U.S. patent application number 16/517981 was filed with the patent office on 2019-11-14 for stereoscopic display device with selectively transmissive parallax barriers.
This patent application is currently assigned to Japan Display Inc.. The applicant listed for this patent is Japan Display Inc.. Invention is credited to Takeo Koito, Daisuke Takama.
Application Number | 20190349574 16/517981 |
Document ID | / |
Family ID | 47992168 |
Filed Date | 2019-11-14 |
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United States Patent
Application |
20190349574 |
Kind Code |
A1 |
Koito; Takeo ; et
al. |
November 14, 2019 |
STEREOSCOPIC DISPLAY DEVICE WITH SELECTIVELY TRANSMISSIVE PARALLAX
BARRIERS
Abstract
A display device including a display part including a pixel of a
first series having a first horizontal pixel width and a pixel of a
second series having a second horizontal pixel width smaller than
the first horizontal pixel width, the pixels of the first series
and the pixels of the second series being arrayed alternately in
each of a horizontal direction and a vertical direction, and a
light beam control part that controls a light beam from the display
part or a light beam toward the display part.
Inventors: |
Koito; Takeo; (Kanagawa,
JP) ; Takama; Daisuke; (Kanagawa, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Japan Display Inc. |
Tokyo |
|
JP |
|
|
Assignee: |
Japan Display Inc.
Tokyo
JP
|
Family ID: |
47992168 |
Appl. No.: |
16/517981 |
Filed: |
July 22, 2019 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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15478907 |
Apr 4, 2017 |
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16517981 |
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15057692 |
Mar 1, 2016 |
9648312 |
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15478907 |
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13609416 |
Sep 11, 2012 |
9313480 |
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15057692 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04N 13/31 20180501;
G09G 3/2003 20130101; H04N 13/351 20180501; H04N 13/305 20180501;
G09G 2320/0209 20130101; H04N 13/324 20180501; H04N 13/312
20180501 |
International
Class: |
H04N 13/31 20060101
H04N013/31; H04N 13/351 20060101 H04N013/351; G09G 3/20 20060101
G09G003/20; H04N 13/305 20060101 H04N013/305; H04N 13/312 20060101
H04N013/312; H04N 13/324 20060101 H04N013/324 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 29, 2011 |
JP |
2011-214867 |
Claims
1. A display device comprising: first-series pixels including a
first first-series pixel and a second first-series pixel;
second-series pixels including a first second-series pixel arranged
between the first first-series pixel and the second first-series
pixel in a first direction; lenses including a first lens opposed
to the first first-series pixel, the second first-series pixel, and
the first second-series pixel, wherein, in a first display mode,
the first first-series pixel is configured to display a first image
corresponding to a first viewpoint, and the first image of the
first first-series pixel is radiated to the first viewpoint through
the first lens, the second first-series pixel is configured to
display a second image corresponding to a second viewpoint, and the
second image of the second first-series pixel is radiated to the
second viewpoint through the first lens, and the first
second-series pixel is configured to display a black color or a
gray color.
2. The display device according to claim 1, wherein, in a second
display mode, the first first-series pixel, the second first-series
pixel, and the first second-series pixel are configured to display
a common image corresponding to the first viewpoint and the second
viewpoint.
3. The display device according to claim 2, wherein: the common
image corresponds to a 2D image, and the first image and the second
image correspond to a 3D image.
4. The display device according to claim 1, wherein the first lens
is a lens with a fixed refraction index.
5. The display device according to claim 1, wherein the first lens
is a liquid crystal lens or a liquid lens.
6. The display device according to claim 1, wherein a distance
between the first first-series pixel and the second first-series
pixel in the first direction is substantially equal to a width of
the first first-series pixel in the first direction.
7. The display device according to claim 1, wherein a distance
between the first first-series pixel and the second first-series
pixel in the first direction is shorter than a width of the first
first-series pixel in the first direction.
8. The display device according to claim 1, wherein a distance
between the first first-series pixel and the second first-series
pixel in the first direction is larger than a width of the first
first-series pixel in the first direction.
9. The display device according to claim 1, wherein: the
first-series pixels further include a third first-series pixel, the
second-series pixels further include a second second-series pixel,
and the second second-series pixel is arranged between the first
first-series pixel and the third first-series pixel in a second
direction which crosses the first direction.
10. The display device according to claim 9, wherein a central
coordinate in the first direction of the first first-series pixel
is equal to a central coordinate in the first direction of the
second second-series pixel.
11. The display device according to claim 1, wherein the first lens
extends in a second direction which crosses the first
direction.
12. The display device according to claim 1, further comprising an
illuminator, wherein the first-series pixels and the second-series
pixels are present between the illuminator and the lenses.
13. The display device according to claim 1, further comprising an
illuminator, wherein the lenses are present between the illuminator
and both the first-series pixels and the second-series pixels.
14. The display device of claim 1, wherein, for a given group of
four neighboring first-series pixels, two of the neighboring
first-series pixels display a same first color and two of the
neighboring first-series pixels display a same second color.
15. The display device of claim 1, wherein, in a second display
mode, the first second-series pixel is configured to display a same
color with at least one of the first first-series pixel or the
second first-series pixel.
16. The display device of claim 1, wherein: the first series pixels
further include a third first-series pixel, the second series
pixels further include a second second-series pixel, the second
second-series pixel is arranged between the first first-series
pixel and the third first-series pixel in a second direction which
crosses the first direction, and in a second display mode, the
second second-series pixel is configured to display a same color
with the first first-series pixel.
Description
RELATED APPLICATION DATA
[0001] This application is a continuation of U.S. patent
application Ser. No. 15/478,907 filed Apr. 4, 2017, which is a
continuation of U.S. patent application Ser. No. 15/057,692 filed
Mar. 1, 2016, now U.S. Pat. No. 9,648,312 issued May 9, 2017, which
is a continuation of U.S. patent application Ser. No. 13/609,416
filed Sep. 11, 2012, now U.S. Pat. No. 9,313,480 issued Apr. 12,
2016, the entireties of all of which are incorporated herein by
reference to the extent permitted by law. The present application
claims the benefit of priority to Japanese Patent Application No.
JP 2011-214867 filed on Sep. 29, 2011 in the Japan Patent Office,
the entirety of which is incorporated by reference herein to the
extent permitted by law.
BACKGROUND
[0002] The present disclosure relates to display devices, display
panels and electronic apparatus for displaying images.
[0003] Recently, display devices capable of performing 3D display
are spotlighted. A 3D display displays viewpoint images including
parallax (difference in point of view). When a viewer views
viewpoint images different from each other with right and left
eyes, the viewer recognizes a stereoscopic image with a depth
sensation. Also, such a display device has been developed in which
three or more images including parallax are displayed, and more
natural 3D images are provided to a viewer.
[0004] As such display devices, for example, a parallax barrier
system and a lenticular lens system are available. These systems
are configured to simultaneously display multiple viewpoint images
and a viewer watches images different from each other depending on
the viewing angle with right and left eyes. For example,
JP-A-3-119889 teaches a display device of parallax barrier system
in which liquid crystal elements are used as the barrier.
[0005] With respect to these display devices of such system,
various techniques for improving the image quality have been
disclosed. For example, JP-A-2008-249887 teaches a display device
which reduces moire caused from relative positional relationship
between pixels array and lens or barrier in a display part. Also,
for example, JP-A-10-186294 teaches a display device capable of
increasing the aperture ratio. Also, for example, JP-A-7-005420
teaches a display device which is capable of displaying images
including continuous parallax.
SUMMARY
[0006] However, these display devices are desired to further
improve the image quality. For example, in a display device capable
of 3D display, it is desired to reduce, so-called crosstalk in
which left eye image and right eye image are mixed. Also, in
addition to 3D display, when a display device is configured to
provide ordinarily 2D display, it is desired to enhance the image
quality of 2D display.
[0007] The present disclosure has been proposed in view of the
above problems. Accordingly, the present disclosure is intended to
provide a display device, a display panel and an electronic
apparatus capable of increasing the image quality.
[0008] A display device according to an embodiment of the present
disclosure includes a display part and a light beam control part.
The display part includes a pixel of a first series having a first
horizontal pixel width and a pixel of a second series having a
second horizontal pixel width smaller than the first horizontal
pixel width, the pixels of the first series and the pixels of the
second series being arrayed alternately in each of a horizontal
direction and a vertical direction. The light beam control part
controls a light beam from the display part or a light beam toward
the display part.
[0009] A display panel according to an embodiment of the present
disclosure includes a pixel of a first series and a pixel of a
second series. The pixel of the first series has a first horizontal
pixel width. The pixel of the second series has a second horizontal
pixel width smaller than the first horizontal pixel width. The
pixels of the first series and the pixels of the second series are
arrayed alternately in each of a horizontal direction and a
vertical direction.
[0010] Electronic apparatuses according to an embodiment of the
present disclosure includes the above display device; for example,
mobile terminal apparatuses such as a television set, a digital
camera, a personal computer, a video camera and a mobile phone are
applicable.
[0011] In a display device, a display panel and an electronic
apparatus according to an embodiment of the present disclosure, a
light beam passes through the light beam control part thereby an
image displayed on the display part is viewed and recognized by a
viewer. At this time, in the display part, the display is performed
on both of pixels of the first series and pixels of the second
series having horizontal pixel width different from each other,
which are disposed alternately in the horizontal direction and the
vertical direction.
[0012] With the display device, the display panel and the
electronic apparatus according to an embodiment of the present
disclosure, since pixels of the first series and pixels of the
second series are arrayed alternately in each of the horizontal
direction and the vertical direction, the image quality can be
enhanced.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1 is a block diagram showing an example of the
configuration of a 3D display device according to an embodiment of
the present disclosure;
[0014] FIG. 2 is a block diagram illustrating an example of the
configuration of the display drive part shown in FIG. 1;
[0015] FIG. 3A is a circuit diagram illustrating an example of the
configuration of the display part shown in FIG. 1; FIG. 3B is a
cross-sectional view thereof;
[0016] FIG. 4 is a plan view illustrating an example of the
configuration of the display part shown in FIG. 1;
[0017] FIG. 5 illustrates a detailed disposition of the sub-pixels
shown in FIG. 4;
[0018] FIG. 6A is a plan view illustrating an example of the
configuration of the barrier part shown in FIG. 1; FIG. 6B is a
cross-sectional view thereof;
[0019] FIG. 7 illustrates a relationship between a barrier part and
the display part shown in FIG. 1;
[0020] FIGS. 8A and 8B are schematic views illustrating a
relationship between the barrier part and the display part shown in
FIG. 1;
[0021] FIG. 9 is a schematic view illustrating an example of the
operation of the 3D display device shown in FIG. 1;
[0022] FIGS. 10A to 10C illustrate a characteristic of the 3D
display device shown in FIG. 1;
[0023] FIG. 11 is a schematic view showing an example of a
brightness distribution in the 3D display device shown in FIG.
1;
[0024] FIG. 12 is a schematic view showing another example of the
brightness distribution in the 3D display device shown in FIG.
1;
[0025] FIG. 13 is a plan view of an example of the configuration of
a display part according to a comparative example;
[0026] FIGS. 14A to 14C illustrate a characteristic of a 3D display
device according to a comparative example;
[0027] FIG. 15 is a schematic view illustrating an example of a
brightness distribution in the 3D display device according to the
comparative example;
[0028] FIG. 16 is a schematic view illustrating another example of
the brightness distribution in the 3D display device according to
the comparative example;
[0029] FIGS. 17A and 17B are plan views illustrating an example of
the configuration of a display part according to a
modification;
[0030] FIG. 18 illustrates a characteristic of the 3D display
device;
[0031] FIGS. 19A AND 19B are plan views illustrating an example of
the configuration of a barrier part according to another
modification;
[0032] FIG. 20 illustrates a relationship between the barrier part
and the display part according to another modification;
[0033] FIG. 21 is a plan view illustrating an example of the
configuration of the display part according to another
modification;
[0034] FIG. 22 illustrates a relationship between the barrier part
and the display part according to another modification;
[0035] FIG. 23 is a plan view illustrating an example of the
configuration of the barrier part according to another
modification;
[0036] FIGS. 24A and 24B are schematic views illustrating a
relationship between the barrier part and the display part
according to another modification;
[0037] FIG. 25 is a block diagram illustrating an example of the
configuration of the 3D display device according to another
modification;
[0038] FIG. 26 is a schematic view illustrating an example of the
operation of the 3D display device according to another
modification;
[0039] FIG. 27 is a plan view illustrating an example of the
configuration of the display part according to another
modification;
[0040] FIG. 28 is a plan view of another example of the
configuration of the display part according to another
modification;
[0041] FIG. 29 is a plan view of another example of the
configuration of the display part according to another
modification;
[0042] FIG. 30 illustrates a relationship between the barrier part
and the display part according to another modification; and
[0043] FIG. 31 is a perspective illustration showing an external
configuration of a TV set to which the 3D display device according
to an embodiment is applied.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0044] Embodiments of the present disclosure will be described in
detail below referring to the appended drawings. Description will
be made in the following order:
1. Embodiments
[0045] 2. Application example
1. EMBODIMENTS
Configuration Example
(Example of Entire Configuration)
[0046] FIG. 1 illustrates an example of configuration of a 3D
display device according to the embodiment. A 3D display device 1
is a 3D display device of parallax barrier system. Since a display
panel according to the embodiment of the present disclosure is
achieved by this embodiment, the description thereof will be made
accordingly.
[0047] The 3D display device 1 includes a control section 41, a
back light drive section 42, a back light 30, a display drive
section 50, a display part 20, a barrier drive section 43 and a
barrier part 10.
[0048] The control section 41 is a circuit that controls the back
light drive section 42, the display drive section 50 and the
barrier drive section 43 based on an image signal Sdisp supplied
from the external. In particular, the control section 41 is
configured to supply a back light control signal to the back light
drive section 42, to supply an image signal Sdisp 2 generated based
on the image signal Sdisp to the display drive section 50, and to
supply a barrier control signal to the barrier drive section 43.
The image signal Sdisp2 is an image signal S2D when the 3D display
device 1 performs ordinary display (2D display) which includes one
viewpoint image; and when the 3D display device 1 performs 3D
display, the image signal Sdisp2 is an image signal S3D which
includes multiple (in this example, 4) viewpoint images as
described below.
[0049] The back light drive section 42 drives the back light 30
based on a back light control signal supplied from the control
section 41. The back light 30 has a function to output
surface-emitted light toward the display part 20. The back light 30
is configured including, for example, an LED (Light Emitting
Diode), a CCFL (Cold Cathode Fluorescent Lamp) or the like.
[0050] The display drive section 50 drives the display part 20
based on the image signal Sdisp2 supplied from the control section
41. In this example, the display part 20 is a liquid crystal
display part, which is configured to drive the liquid crystal
display and modulates light output from the back light 30 to
thereby perform a display.
[0051] The barrier drive section 43 drives the barrier part 10
based on the barrier control signal supplied from the control
section 41. The barrier part 10 allows the light, which is output
from the back light 30 and passes through the display part 20, to
pass therethrough (open operation) or blocks (close operation) the
same, and has multiple open/close parts 11 and 12 (described below)
which is configured by using liquid crystal.
[0052] In the 3D display device 1, the back light 30, the display
part 20, and the barrier part 10 are disposed in this order as
shown in FIG. 1. That is, it is arranged so that the light output
from the back light 30 reaches to a viewer through the display part
20 and the barrier part 10.
(Display Drive Section 50 and Display Part 20)
[0053] FIG. 2 is a block diagram illustrating an example of the
display drive section 50. The display drive section 50 includes a
timing control section 51, a gate driver 52 and a data driver 53.
The timing control section 51 controls the drive timing of the gate
driver 52 and the data driver 53, generates an image signal Sdisp3
based on the image signal Sdisp2 supplied from the control section
41 and supplies the same to the data driver 53. The gate driver 52
selects pixels Pix within the display part 20 in order on the line
basis in accordance with the timing control by the timing control
section 51, to performing the scanning on the lines in order. The
data driver 53 supplies a pixel signal based on the image signal
Sdisp3 to each of the pixels Pix of the display part 20. In
particular, the data driver 53 performs a D/A (digital-analog)
conversion based on an image signal Sdisp3 to generate an analog
pixel signal, and supplies the same to each of the pixels Pix
[0054] FIGS. 3A and 3B illustrate an example of configuration of
the display part 20; FIG. 3(A) illustrates an example of a circuit
diagram of a sub-pixel SPix constituting a pixel Pix; and FIG. 3(B)
illustrates a configuration of a cross-section of the display part
20.
[0055] Each pixel Pix has three sub-pixels SPix corresponding to
red (R), green (G), blue (B) respectively. Each of the sub-pixels
SPix includes a TFT (Thin Film Transistor) element Tr, a liquid
crystal element LC and a retentive capacity element Cs as shown in
FIG. 3(A). TFT element Tr is made of, for example, a MOS-FET (Metal
Oxide Semiconductor-Field Effect Transistor); the gate thereof is
connected to a gate line GCL; the source is connected to a data
line SGL; and the drain is connected to one end of the liquid
crystal element LC and of the retentive capacity element Cs. One
end of the liquid crystal element LC is connected to the drain of
the TFT element Tr, and the other end thereof is grounded. One end
of the retentive capacity element Cs is connected to the drain of
the TFT element Tr, and the other end thereof is connected to a
retentive capacity line CSL. The gate line GCL is connected to the
gate driver 52; and the data line SGL is connected to the data
driver 53.
[0056] The display part 20 is constituted of a drive substrate 207,
a counter substrate 208 and a liquid crystal layer 203 sealed
therebetween as shown in FIG. 3(B). The drive substrate 207
includes a transparent substrate 201, a pixel electrode 202 and a
polarization plate 206a. The transparent substrate 201 is made of,
for example, glass or the like formed with a TFT element Tr. On the
transparent substrate 201, a pixel electrode 202 is disposed for
each sub-pixel SPix. On the surface opposite to the surface
disposed with the pixel electrode 202 of the transparent substrate
201, the polarization plate 206a is stuck. The counter substrate
208 includes a transparent substrate 205, a counter electrode 204
and a polarization plate 206b. The transparent substrate 205 is
made of, for example, glass or the like. On the surface at the
liquid crystal layer 203 side of the transparent substrate 205, a
color filter and a black matrix are formed; and further thereon,
the counter electrode 204 is disposed as a common electrode for the
sub-pixels SPix. On the surface of the transparent substrate 205
opposite to the surface disposed with the counter electrode 204,
the polarization plate 206b is stuck. The polarization plate 206a
and the polarization plate 206b are stuck to each other so as to be
crossed Nichol prism or parallel polarizer.
[0057] FIG. 4 illustrates an array of sub-pixels SPix in the
display part 20. In FIG. 4,
"R" represents a red sub-pixel SPix; "G" represents a green
sub-pixel SPix; and "B" represents a blue sub-pixel SPix.
[0058] The display part 20 includes two different sub-pixels SPix
(21, 22) each extending in a vertical direction Y and each
different in width in the horizontal direction X of the display
screen. In particular, the display part 20 includes sub-pixels 21
(21R, 21G 21B) which have a larger width W21 in the horizontal
direction X, and sub-pixels 22 (22R, 22G, 22B) which have a smaller
width W22 in the horizontal direction X. The sub-pixels 21 and
sub-pixels 22 are disposed alternately in the horizontal direction
X. In particular, in this example, sub-pixels 21R, 22B, 21G 22R,
21B and 22G are repeatedly disposed in the horizontal direction X
in this order. Also, the sub-pixel 21 and the sub-pixel 22 are
disposed alternately in the vertical direction Y of the display
screen. The sub-pixel 21 and the sub-pixel 22 neighboring on each
other in the vertical direction Y are arranged so that the central
coordinates thereof coincide with each other in the horizontal
direction X. In the boundary area between the neighboring
sub-pixels 21 and 22, a black matrix (not shown) is formed to
prevent color mixture among red (R), green (G) and blue (B).
[0059] FIG. 5 illustrates more precisely the disposition of the
sub-pixels 21 in the display part 20. In the display part 20, the
distance S21 between the neighboring sub-pixels 21 in the
horizontal direction X is arranged to be equal to a width W21 of
the sub-pixels 21 itself. With this arrangement, for example, the
coordinate of the right edge (for example, right edge SR1) in the
horizontal direction X of a sub-pixel 21 is arranged to be equal to
the coordinate in the horizontal direction X of the left edge (for
example, left edge SL2) of the sub-pixel 21 which is disposed
neighboring at right upper. And for example, the coordinate in the
horizontal direction X of the left edge (for example, left edge
SL1) of a sub-pixel 21 is arranged to be equal to the coordinate of
the right edge (right edge SR2) in the horizontal direction X of
the sub-pixel 21 which is disposed neighboring at the left
upper.
[0060] With this arrangement, when the 3D display device 1 performs
a 3D display, which will be described later, the sub-pixels 21
display four viewpoint images, and the sub-pixel 22 displays a
black color. When the 3D display device 1 performs an ordinary
display (2D display), both of the sub-pixel 21 and the sub-pixel 22
displays a two dimensional image. With this, when the 3D display
device 1 performs the 3D display, which will be described later,
moire and crosstalk are reduced resulting in a enhanced image
quality; and when the ordinary display is made, the image quality
is enhanced by increased brightness.
(Barrier Part 10)
[0061] FIGS. 6A and 6B illustrate an example of a configuration of
the barrier part 10; FIG. 6A is a plan view of the barrier part 10,
and FIG. 6B shows a cross-sectional configuration of the barrier
part 10 taken along a line VI-VI as viewed in a direction of
arrows.
[0062] The barrier part 10 is so-called a parallax barrier
including multiple open/close parts (liquid crystal barrier) 11 and
12, which are light-transmissive or block the light as shown in
FIG. 6A. In this example, the open/close parts 11 and 12 are
provided extending in the vertical direction Y. In this example,
the width W11 of the open/close part 11 and the width W12 of the
open/close part 12 are different from each other; in this case, for
example, W11>W12. However, the width relationship of the
open/close parts 11 and 12 is not limited to this; it may be
W11<W12 or W11=W12.
[0063] The barrier part 10 includes a drive substrate 107, a
counter substrate 108 and a liquid crystal layer 103 sealed
therebetween as shown in FIG. 6B. The drive substrate 107 includes
a transparent substrate 101, a transparent electrode layer 102 and
a polarization plate 106a. The transparent substrate 101 is made
of, for example, glass or the like, and the transparent electrode
layer 102 is formed thereon. On the surface opposite to the surface
which is disposed with the transparent electrode layer 102 of
transparent substrate 101, the polarization plate 106a is stuck
thereto. The counter substrate 108 includes a transparent substrate
105, a transparent electrode layer 104 and a polarization plate
106b. The transparent substrate 105 is made of, for example, glass
or the like, and the transparent electrode layer 104 is formed
thereon. On the surface opposite to the surface which is disposed
with the transparent electrode layer 104 of the transparent
substrate 105, the polarization plate 106b is stuck thereto. The
polarization plate 106a and polarization plate 106b are stuck with
respect to each other so as to form crossed Nichol prism or
parallel polarizer.
[0064] The transparent electrode layer 102 has multiple transparent
electrodes 110 and 120. The transparent electrode layer 104 is
provided as so-called a common electrode over the positions
corresponding to the multiple transparent electrodes 110 and 120.
Each of the open/close part 11 is configured including the
transparent electrode 110 and the portions corresponding to the
transparent electrode 110 in the liquid crystal layer 103 and the
transparent electrode layer 104. Likewise, the open/close part 12
is configured including the transparent electrode 120 and the
portions corresponding to the transparent electrodes 120 in the
liquid crystal layer 103 and transparent electrode layer 104. With
this configuration, when a voltage is selectively applied to the
transparent electrode 110 or transparent electrode 120, in the
barrier part 10, the liquid crystal layer 103 has a liquid-crystal
molecular orientation corresponding to the voltage; and thus, the
open/close operation of the respective open/close parts 11 and 12
can be performed.
[0065] The open/close parts 11 and 12 perform different operations
depending on the display mode that the 3D display device 1
performs; i.e., the ordinary display (2D display) or the 3D
display. In particular, when the ordinary display is made the
open/close part 11 gets into the open state (transmissive state);
and when the 3D display is made, the open/close part 11 gets into
the closed state (blocking state) which will be described below. In
both of the ordinary display mode and the 3D display mode, the
open/close part 12 gets into open state (transmissive state).
[0066] FIG. 7 illustrates a relative positional relationship in the
display part 20 between the sub-pixels 21 and the open/close parts
11 and 12 in the barrier part 10. Note that the sub-pixels 22 in
the display part 20 are omitted in the figure in FIG. 7. That is,
the sub-pixels 22, which display a black color when the 3D display
is performed, are omitted in FIG. 7. Within neighboring two lines,
one open/close part 12 is provided for four sub-pixels 21
(sub-pixel group PG) in the horizontal direction X. This
corresponds to the fact that, when the 3D display device 1 performs
the 3D display, four viewpoint images are displayed.
[0067] FIGS. 8A and 8B schematically illustrate the state of the
barrier part 10 in a cross-sectional structure when the 3D display
and the ordinary display (2D display) are made. FIG. 8A shows a
state when the 3D display is made; and FIG. 8B shows a state when
the ordinary display is made. In FIG. 8, the open/close parts 11
marked with slashes represent the state that the light is
blocked.
[0068] When the 3D display is made, an image signal S3D is supplied
to the display drive section 50, and the display part 20 performs
the display based on the image signal S3D. In particular, as show
in FIG. 8A, in the barrier part 10, the open/close parts 12 get in
the open state (transmissive state); and the open/close parts 11
get into the closed state (blocking state). In the display part 20,
the neighboring four sub-pixels 21 (sub-pixel group PG) disposed at
the positions corresponding to the open/close part 12 displays four
piece of sub-pixel information P1-P4 each corresponding to the
viewpoint images; and every sub-pixel 22 (not shown) performs the
black display. With this arrangement, the viewer views viewpoint
images which are different from each other on the left eye and the
right eye as described later; i.e., stereoscopic image.
[0069] When the ordinary display (2D display) is made, an image
signal S2D is supplied to the display drive section 50, and the
display part 20 performs the display based on the image signal S2D.
In particular, in the barrier part 10, both of the open/close parts
11 and 12 get into the open state (transmissive state); and in the
display part 20, every sub-pixels 21 and 22 display one viewpoint
image (two dimensional image) as shown in FIG. 8B. With this, the
viewer views an ordinary two dimensional image displayed on the
display part 20 as it is.
[0070] Here, the sub-pixels 21 (21R, 21G, 21B) correspond to a
particular example of "first series pixels" according to an
embodiment of the present disclosure; while the sub-pixels 22 (22R,
22G 22B) correspond to a particular example of "second series
pixels" according to an embodiment of the present disclosure. The
open/close part 12 corresponds to a particular example of "liquid
crystal barrier in first series" according to an embodiment of the
present disclosure; and the open/close part 11 corresponds to a
particular example of a "liquid crystal barrier in second series"
according to an embodiment of the present disclosure.
[Operation and Working]
[0071] Subsequently, the operation and working of the 3D display
device 1 of the embodiment will be described below.
(Entire Outline of the Operation)
[0072] Referring to FIG. 1, entire outline of the operation of the
3D display device 1 will be described first. The control section 41
controls the back light drive section 42, the display drive section
50 and the barrier drive section 43 based on the image signal Sdisp
which is supplied from the external. The back light drive section
42 drives the back light 30 based on a back light control signal
supplied from the control section 41. The back light 30 outputs the
emitted light from the surface thereof to the display part 20. The
display drive section 50 drives the display part 20 based on the
image signal Sdisp2 supplied from the control section 41. The
display part 20 modulates the light output from the back light 30
to perform the display. In particular, when performing the 3D
display, the sub-pixels 21 on the display part 20 display the pixel
information relevant to the four viewpoint images, and the
sub-pixels 22 perform the black display. When performing the
ordinary display (2D display), the sub-pixels 21 and 22 display a
pixel information according to one viewpoint image (two dimensional
image). The barrier drive section 43 controls the barrier part 10
based on the barrier control signal supplied from the control
section 41. The open/close parts 11 and 12 in the barrier part 10
performs the open/close operation based on an instruction from the
barrier drive section 43 to allow the light, which is output from
the back light 30 and passes through the display part 20, to pass
therethrough or block the same.
(Detailed Operation of the 3D Display)
[0073] The operation for performing the 3D display will be
described in detail.
[0074] FIG. 9 illustrates an example of 3D display operation in the
display part 20 and the barrier part 10. When the 3D display is
performed, in the barrier part 10, the open/close parts 12 get into
the open state (transmissive state); and the open/close parts 11
gets into the closed state (blocking state). The display part 20
displays the pixel information of the image signal S3D. At this
time, the four sub-pixels 21 (sub-pixel group PG) disposed adjacent
to the open/close part 12 display the pixel information P1-P4
corresponding to four viewpoint images respectively as shown in
FIG. 9. The respective beams of light output from each of the
sub-pixels 21 in the display part 20 are output with an angle
restricted by the open/close part 12. With this, the viewer views,
for example, the pixel information P2 with the left eye, and the
pixel information P3 with the right eye. Thus, the viewer views
different pieces of pixel information in the pixel information
P1-P4 with the left eye and the right eye. Accordingly, the viewer
senses the displayed image as a stereoscopic image.
(Image Quality)
[0075] Subsequently, a description is made on the image quality of
the 3D display device 1. The description is made on the image
quality of the 3D display, and then on the image quality of the
ordinary display.
[0076] First, a description is made on the moire and the crosstalk
in the 3D display.
[0077] FIG. 10A-FIG. 10C illustrate relative positional
relationship between the sub-pixels 21 in the display part 20 and
the open/close parts 12 in the barrier part 10. Note that the
open/close parts 11 and the sub-pixels 22 are omitted in these
figures. That is, in these figures, the open/close parts 12 which
get into the open state when the 3D display is made and the
sub-pixels 21 that display the image are illustrated; but the
open/close parts 11 that get into the closed state when the 3D
display is made and the sub-pixels 22 that display black color are
omitted. The positional relationship shown in FIG. 10A-FIG. 10C is
caused by, for example, a viewing angle when the viewer views the
display screen. In particular, for example, when the viewer views
from the front side perpendicular to the display screen, the
positional relationship shown in FIG. 10B is obtained; when the
viewer views from at the right side with respect to the front side
perpendicular to the display screen, the positional relationship
shown in FIG. 10A is obtained; and when the viewer views from at
the left side with respect to the front side perpendicular to the
display screen, the positional relationship shown in FIG. 10C is
obtained.
[0078] For example, in the positional relationship shown in FIG.
10A, the viewer views a portion A1 in the sub-pixels 21G
corresponding to an open/close part 12 in the open state. In the
positional relationship shown in FIG. 10B, the viewer views
portions A21 and A22 corresponding to the open/close part 12 in two
sub-pixels 21G. Also in the positional relationship shown in FIG.
10C, the viewer views a portion A3 corresponding to an open/close
part 12 in the open state in the sub-pixels 21G. At this time, in
the 3D display device 1, since the sub-pixels 21 are disposed so
that distance S21 in the horizontal direction X is equal to the
width W21 between the sub-pixels 21 as shown in FIG. 5, the area of
the portion A1 in FIG. 10A, the total area of the portions A21 and
A22 in FIG. 10B and the area of the portion A3 in FIG. 10C are
equal to each other. That is, the area of the viewed sub-pixel is
constant regardless of the viewing angle .alpha. when the viewer
views the display screen. With this, since the 3D display device 1
maintains the brightness at a substantially constant level
regardless of the viewing angle .alpha., the generation of moire is
suppressed; and thus and the deterioration of the image quality is
suppressed different from the case of comparative example, which
will be described later.
[0079] Also, for example, the relative positional relationship
between the sub-pixels 21 and 22 and the open/close part 12 may
displace from a desired positional relationship due to the
differences of manufacturing conditions or the like, and there may
be a case that the states shown in FIG. 10A-FIG. 10C cyclically
appear on the display screen. However, even in such case, the 3D
display device 1, in the states shown in FIG. 10A-FIG. 10C, since
the brightness is equal to each other, the brightness on the
display screen is maintained uniformly.
[0080] FIGS. 11 and 12 schematically illustrate the brightness
distribution relevant to a sub-pixel group PG FIG. 11 illustrates a
case when the width W12 of the open/close parts 12 is large; and
FIG. 12 illustrates a case when the width W12 of the open/close
parts 12 is small.
[0081] Multiple light beams relevant to four viewpoint images,
which are different from each other are output from each sub-pixel
(in this example, two sub-pixels 21R and two sub-pixels 21G) in the
sub-pixel group PG, and each of the multiple light beams proceeds
in the respective directions passing through the open/close part 12
in the open state resulting in a brightness distribution ID. The
brightness distribution ID reflects the width W12 of the open/close
part 12. That is, in the brightness distribution ID, the larger
width W12 of the open/close part 12 (FIG. 11) obtains the
brightness I higher than that of the smaller width W12 (FIG. 12).
And the smaller width W11 of the open/close part 12 obtains the
overlapped portion in the neighboring brightness distributions ID
that is larger than that of the larger width W11 (FIG. 11).
[0082] The total brightness IT, which is the sum of the brightness
distributions ID, becomes substantially constant regardless of the
width W12 of the open/close part 12 and regardless of the viewing
angle .alpha. as shown in FIG. 11 and FIG. 12, thus the generation
of moire is suppressed. This agrees with the fact that the area of
the viewed sub-pixel is substantially constant regardless of the
viewing angle .alpha. as described referring to FIG. 10. That is,
since this characteristic is caused from the disposition of the
sub-pixels 21 as shown in FIG. 5, this characteristic is ensured
regardless of the width W12 of the open/close part 12. In the 3D
display device 1, since the total brightness IT has a flat
characteristic with respect to the viewing brightness a regardless
of the width W12 of the open/close part 12, the generation of moire
is suppressed.
[0083] In a range where neighboring brightness distributions
overlap with each other (crosstalk range act), the beams of light
relevant to the viewpoint images, which are different from each
other, overlap with each other. When the viewer views the displayed
image at a viewing angle .alpha. within the range, a crosstalk
occurs, in which different viewpoint images are displayed being
overlapped with each other. The crosstalk range act can be made
smaller by reducing the width W12 of the open/close part 12 as
demonstrated in FIGS. 11 and 12. That is, different from a
comparative example, which will be described later, in the 3D
display device 1, the crosstalk can be reduced while suppressing
the generation of moire by reducing the width W12 of the open/close
part 12.
[0084] As described above, in the 3D display device 1, since the
sub-pixels 21 and the sub-pixels 22 are disposed alternately in the
horizontal direction X, the generation of moire can be suppressed
regardless of the width W12 of the open/close part 12, and thus,
the degree of designing freedom is enhanced. In particular, for
example, to reduce the crosstalk, width W12 of the open/close part
12 is reduced; to enhance the brightness I, the width W12 of the
open/close part 12 is increased.
[0085] Subsequently, a description will be made on the image
quality in the ordinary display (2D display).
[0086] When performing the ordinary display, the 3D display device
1 controls the open/close parts 11 and 12 in the barrier part 10 to
get into the open state (transmissive state), and the sub-pixels 21
and 22 in the display part 20 display a two dimensional image. That
is, when performing the 3D display, only the sub-pixels 21 in the
display part 20 display a viewpoint image and the sub-pixels 22
perform black display. When performing ordinary display, both of
the sub-pixels 21 and 22 display the image. Compared to the case
where the sub-pixels 22 are not provided, the 3D display device 1
enhances the brightness during the ordinary display. As described
above, when performing the 3D display, the 3D display device 1
effectively utilizes the sub-pixels 22 performing the black display
during the ordinary display; to thereby enhance the image
quality.
[0087] Also, in the 3D display device 1, the sub-pixels 21 and 22
are repeatedly disposed like 21R, 22B, 21G 22R, 21B and 22G in this
order as shown in FIG. 4. The sub-pixels, which are relevant to the
same color (for example, sub-pixels 21R, 22R), are disposed
uniformly at the constant distance in the horizontal direction X.
Compared to the case where, for example, the sub-pixels 21R, 22R
are disposed being neighboring on each other, smooth display with
little sensation of dots is achieved.
Comparative Example
[0088] While comparing with a comparative example, advantageous
effects of the 3D display device 1 according to the present
embodiment will be described below. A 3D display device 1R
according to the comparative example is configured including a
display part 60R in which the disposition of sub-pixels SPix is
different from that of the present embodiment. Other configuration
is identical to that of the present embodiment (FIG. 1 or the
like).
[0089] FIG. 13 illustrates the array of sub-pixels SPix in the
display part 60R. The display part 60R includes sub-pixels 61 (61R,
61G, 61B) each of which has an equal width in the horizontal
direction X. That is, in the display part 20 according to the
present embodiment, two different kinds of sub-pixels 21 and 22
each having a width different from each other are included.
However, in the display part 60R according to the comparative
example, the width of every sub-pixels of 61R, 61G and 61B is equal
each other. The 3D display device 1R is configured so that every
sub-pixel of 61R, 61G and 61B performs the display in both modes of
the 3D display and the ordinary display (2D display).
[0090] FIGS. 14A to 14C illustrate a relative positional
relationship between the sub-pixel 61 and the open/close part 12 in
the 3D display device 1R. When the 3D display is performed, for
example, in the positional relationship shown in FIG. 14A, the
viewer views a portion R1 corresponding to the open/close part 12
in the open state in a sub-pixel 61G. In a positional relationship
shown in FIG. 14B, the viewer views portions R21 and R22
corresponding to the open/close part 12 in certain two sub-pixels
61G. In a positional relationship shown in FIG. 14C, the viewer
views a portion R3 corresponding to the open/close part 12 in a
sub-pixel 61G. In this case, for example, the area of the portion
R1 in FIG. 14A and the area of the portion R3 in FIG. 14C are
larger than the total area of the portions R21 and R22 in FIG. 14B.
In this example, in the positional relationships shown in FIG. 14A
and FIG. 14C, compared to the positional relationship in FIG. 14B,
the brightness of green is higher. Thus, in the 3D display device
1R, the brightness changes (moire) depending on a viewing angle
.alpha. and the image quality may be deteriorated.
[0091] Also, for example, when the relative positional relationship
between the sub-pixel 61 and the open/close part 12 is deviated
from a desired positional relationship due to differences in
manufacturing conditions, and when the states shown in FIG.
14A-FIG. 14C cyclically appear in the display screen, in the states
in FIG. 14A-FIG. 14C, the brightness is different from each other,
the viewer may view uneven brightness on the display screen and the
image quality may be deteriorated.
[0092] FIGS. 15 and 16 schematically illustrate a brightness
distribution relevant to a sub-pixel group PG in the 3D display
device 1R. FIG. 15 illustrates the case where the width W12 of the
open/close part 12 is larger. And FIG. 16 illustrates the case
where the width W12 of the open/close part 12 is smaller.
[0093] The total brightness IT which is a sum of the respective
brightness distributions ID changes depending on the viewing angle
.alpha. as shown in FIGS. 15 and 16. This is caused from the fact
that area of the viewed sub-pixel 61 changes depending on the
viewing angle .alpha. as shown in FIGS. 14A-14C. Particularly, when
the width W12 of the open/close part 12 is made smaller as shown in
FIG. 16, the total brightness IT largely changes depending on the
viewing angle .alpha.. As describe above, in the 3D display device
1R, when the width W12 of the open/close part 12 is made smaller,
the brightness I changes depending on the viewing angle .alpha.,
and this may be recognized as a moire.
[0094] The crosstalk range act can be reduced by reducing the width
W12 of the open/close part 12 as shown in FIGS. 15 and 16. That is,
same as the case of the 3D display device 1 according to the
present embodiment, the crosstalk can be reduced by reducing the
width W12 of the open/close part 12.
[0095] As described above, in the 3D display device 1R according to
the comparative example, for example, when the width W12 of the
open/close part 12 is made larger, although the moire on the
display screen can be reduced, the crosstalk gets worse. Also, for
example, when the width W12 of the open/close part 12 is made
smaller, although the crosstalk can be reduced, the moire is
generated. That is, in the 3D display device 1R, the moire and the
crosstalk are in a relationship of trade-off. Therefore, both
characteristics are hardly improved simultaneously.
[0096] On the other hand, in the 3D display device 1 according to
the present embodiment, since the sub-pixel 21 and the sub-pixel 22
are disposed alternately in the horizontal direction X, generation
of moire can be suppressed regardless of the width W12 of the
open/close part 12. That is, in the 3D display device 1, the moire
and the crosstalk are not in a relationship of trade-off.
Therefore, the crosstalk can be reduced while suppressing the
generation of moire by reducing the width W12 of the open/close
part 12.
Advantageous Effect
[0097] As described above, according to the present embodiment, in
addition to the sub-pixels 21, the sub-pixels 22 are provided.
Therefore, the brightness in the ordinary display (2D display) can
be enhanced resulting in an enhanced image quality.
[0098] Also, in the present embodiment, the distance between the
sub-pixels 21 in the horizontal direction is arranged to be equal
to the width of the sub-pixel 21 itself. Therefore, the generation
of moire can be suppressed during performing the 3D display and the
degree of designing freedom can be enhanced. In particular, for
example, when the width of the open/close part 12 made smaller, the
crosstalk can be reduced while suppressing the generation of
moire.
[Modification 1-1]
[0099] In the above embodiment, the distance S21 between the
sub-pixels 21 in the horizontal direction X is arranged to be equal
to the width W21 of the sub-pixel 21 itself. However, the
embodiment is not limited to this. Detailed descriptions will be
made below.
[0100] FIGS. 17A and 17B illustrate the disposition of the
sub-pixels 21 in the display part 20A according to the modification
1-1. FIG. 17A illustrates the case where the distance S21 between
the sub-pixels 21 is smaller than the width W21. FIG. 17B
illustrates the case where the distance S21 between the sub-pixels
21 is larger than the width W21. When the sub-pixels 21 are
disposed as shown in FIG. 17, different from the case of the
above-described embodiment (FIG. 10), the area of the viewed
sub-pixel changes slightly depending on the viewing angle .alpha.
when the viewer views the display screen. With this, for example,
the smaller the width W12 of the open/close part 12, the fewer the
crosstalk results in. However, the moire may be generated. That is,
in the modification 1-1, although not so considerably large as the
above-described comparative example, a relationship of trade-off is
generated between the crosstalk and the moire. Therefore, in the
modification 1-1, it is necessary to arrange the distance S21
between the sub-pixels 21 and the width W12 of the open/close part
12 within a range where the image quality is not deteriorated by
the crosstalk and the moire.
[0101] A description will be made on the amount of the crosstalk
and the moire under which the viewer does not recognize the decease
of the image quality. A description is made first on acceptable
amount of the crosstalk.
[0102] FIG. 18 illustrates the brightness distribution of the
neighboring multiple sub-pixels 21. In an area adjacent to the both
sides of a viewing angle range R.alpha. in which mainly the light
from a sub-pixel 21 can be viewed, the light from a sub-pixel 21
neighboring on the sub-pixel 21 also viewed. In particular, for
example, at the viewing angle .alpha.1, in addition to the light of
brightness I1 from the desired sub-pixel 21, the light of
brightness I2 from the neighboring sub-pixel 21 is also viewed. At
this time, the crosstalk amount CT is expressed by the following
formula:
CT=I2/I1.times.100 (1)
That is, the crosstalk amount CT is a value such that the larger
influence from the neighboring sub-pixel 21 (the larger crosstalk),
the larger value results in. Personal difference is found in
recognition of the decease of image quality due to the crosstalk;
and the sensation is different depending on the content of the
displayed image. The crosstalk amount CT is preferred to be
approximately 10% or less.
[0103] Subsequently, a description is made on acceptable amount of
the moire. In the case when the sub-pixels 21 are disposed as shown
in FIGS. 17A and 17B the area of the viewed sub-pixel changes
depending on the viewing angle .alpha. when the viewer views the
display screen. Therefore, the brightness I changes depending on
the viewing angle .alpha.. In particular, it is assumed that, for
example, at a viewing angle .alpha., the brightness I is maximum
(brightness I3); and at another viewing angle .alpha., the
brightness I is minimum (brightness I4). At this time, the moire
amount MO is expressed by the following formula:
MO=(1-I4/I3).times.100 (2)
That is, the moire amount MO is a value such that the larger
difference of the brightness I due to the viewing angle .alpha.
results in the larger value. Personal difference is found also in
the recognition of the image quality decease due to the moire. The
moire amount MO is preferably approximately 30% or less.
[0104] Accordingly, when disposing the sub-pixels 21 as shown in
FIGS. 17A and 17B, the sub-pixels 21 are preferably disposed so
that the crosstalk amount CT is 10% or less; and the moire amount
MO is 30% or less, for example.
[Modification 1-2]
[0105] In the above embodiment, it is arranged so that, when
performing the 3D display, the sub-pixels 22 display the black
color. The embodiment is not limited to this. Alternatively, for
example, gray may be displayed. With this, compared to the case
where sub-pixels 22 perform the black display, the brightness of
the display screen can be enhanced during the 3D display.
[0106] In this case, the crosstalk amount CT also can be reduced.
When the sub-pixels 22 display the gray, the crosstalk amount CT is
expressed by the following formula:
CT=I2/(I1+IG).times.100 (3)
Wherein, IG is a brightness of gray display. Thus, when the
sub-pixels 22 performs the gray display, the crosstalk amount CT
decreases. Thus, the possibility that the viewer recognizes the
decease of the image quality due to the crosstalk can be reduced.
In this case also, the brightness IG of the gray display may be set
so that the crosstalk amount CT is, for example, 10% or less.
[Modification 1-3]
[0107] In the above embodiment, the open/close parts 11 and 12 are
provided so as to extend in the vertical direction Y. However, the
embodiment is not limited to this. Alternatively, for example,
open/close parts 71A and 72A may be formed in a step-like
configuration as a barrier part 70A shown in FIG. 19A. Or,
open/close parts 71B and 72B may be formed so as to extend in an
oblique direction as a barrier part 70B shown in FIG. 19B.
[0108] FIG. 20 illustrates a positional relationship between the
sub-pixels 21 and the open/close part 72A in the case where barrier
part 70A is used shown in FIG. 19A. Note that, the sub-pixels 22
and open/close part 72B are omitted in the figure. Receiving an
identical control signal, these open/close parts 72A perform the
open/close operation simultaneously. One open/close part 72A is
provided for four sub-pixels 21 in the horizontal direction X. This
agrees with a fact that the 3D display device according to the
modification performs the 3D display by displaying four viewpoint
images.
[Modification 1-4]
[0109] In the above embodiment, the sub-pixels 21 and 22 are formed
to extend in the vertical direction Y. However, the embodiment is
not limited to this. Alternatively, the sub-pixels 21 and 22 may be
formed to extend, for example, in the horizontal direction X.
Detailed description is made below on such modification.
[0110] FIG. 21 illustrates an array of sub-pixels SPix in a display
part 80 according to a modification. The display part 80 includes
two different types of sub-pixels SPix (81 and 82) that extend in
the horizontal direction X but the width in the horizontal
direction X is different from each other. In particular, the
display part 80 includes sub-pixels 81 (81R, 81G, 81B) that has a
larger width (width W81) in the horizontal direction X and
sub-pixels 82 (82R, 82G, 82B) that has a smaller width (width W82)
in the horizontal direction X. The sub-pixels 81 and the sub-pixels
82 are disposed alternately in both of the horizontal direction X
and the vertical direction Y. In particular, in this example,
sub-pixels 81R, 82G, 81B, 82R, 81G, 82B are repeatedly dispose in
the vertical direction Y in this order. In this case, the
sub-pixels 81 and the sub-pixels 82 neighboring on each other in
the vertical direction Y are arranged so as that the central
coordinates thereof in the horizontal direction X coincide with
each other. Also, in the horizontal direction X, the sub-pixels 81R
and 82R are disposed alternately; the sub-pixel 81G and 82G are
disposed alternately; and the sub-pixel 81B and 82B are disposed
alternately. In the display part 80, the distance S81 between the
sub-pixels 81 neighboring in the horizontal direction X is equal to
the width W81 of the sub-pixel 81 itself. With this configure, when
the display device according to the modification 1-4 performs the
3D display, the sub-pixel 81 displays four viewpoint images, and
the sub-pixel 82 displays a black color. When performing the
ordinary display (2D display), both of the sub-pixel 81 and the
sub-pixel 82 display a two dimensional image.
[0111] FIG. 22 illustrates a positional relationship between the
sub-pixels 81 in the display part 80 and the open/close parts 12 in
the barrier part 10. Note that the open/close part 11 and the
sub-pixels 82 are omitted in this figure. One open/close part 12 is
provided for four sub-pixels 81 (sub-pixel group PG) within two
neighboring lines. This agrees with the fact that the 3D display
device according to a modification displays four viewpoint images
when performing the 3D display.
[Modification 1-5]
[0112] In the above embodiment, when performing the 3D display, the
open/close part 12 is constantly maintained in the open state.
However, the embodiment is not limited to this. Alternatively, for
example, by dividing open/close part 12 into multiple groups, and
the groups may be driven to open/close in a time-sharing manner.
Detailed description is made below.
[0113] FIG. 23 illustrates an example of a group configuration of
the open/close part 12. In this example, the open/close part 12 is
divided into two groups; i.e., group-A and group-B. Open/close
parts 12 included in the group-A and open/close parts 12 included
in the group-B are disposed alternately being interposed by the
open/close part 11. Hereinafter, the open/close parts 12 included
in the group-A are appropriately referred to as open/close parts
12A as a collective designation; likewise, the open/close parts 12
included in the group-B are appropriately referred to as open/close
parts 12B as a collective designation.
[0114] FIGS. 24A TO 24B illustrate an example of the operation of a
3D display device 1E according to a modification when performing
the 3D display. FIG. 24A illustrates a first state; and FIG. 24B
illustrates a second state. The 3D display device 1E performs the
operation while switching between the first state and the second
state alternately.
[0115] In the first state, each of the sub-pixels 21 in the display
part 20 displays a piece of pixel information P1-P4 corresponding
to four viewpoint images respectively as shown in FIG. 24A. At this
time, the respective pieces of pixel information P1-P4 are
displayed on the sub-pixels 21 disposed adjacent to the open/close
part 12A. In the barrier part 10, the open/close part 12A gets into
the open state (transmissive state); the open/close part 12B gets
into the closed state. The respective light beams output from the
respective sub-pixels 21 in the display part 20 are output at an
angle regulated by the open/close part 12A. With this, the viewer
views, for example, a piece of pixel information P2 with the left
eye and a piece of pixel information P3 with the right eye; and
thus, the viewer can view a stereoscopic image.
[0116] In the second state, each of the sub-pixels 21 in the
display part 20 displays a piece of pixel information P1-P4
corresponding to the four viewpoint images as shown in FIG. 24B. At
this time, the four pieces of pixel information P1-P4 are displayed
on the sub-pixels 21 disposed adjacent the open/close part 12B. In
the barrier part 10, the open/close part 12B gets into the open
state (transmissive state), and the open/close part 12A gets into
the closed state. The respective light beams output from each of
the sub-pixels 21 in the display part 20 are output at an angle
regulated by the open/close part 12B. With this, the viewer views,
for example, a piece of pixel information P2 with the left eye, and
a piece of pixel information P3 with the right eye; and thus, the
viewer can view a stereoscopic image.
[0117] By displaying the image while causing the open/close part
12A and the open/close part 12B to open/close alternately in a
time-sharing manner as described above, the viewer views images
displayed at positions displaced from each other while averaging
the images. The 3D display device 1E achieves a resolution
two-times higher than that of the 3D display device 1 according to
the above embodiment.
[Modification 1-6]
[0118] In the above embodiments, the back light 30, the display
part 20 and the barrier part 10 are disposed in this order.
However, the embodiment is not limited to this. Alternatively, the
back light 30, the barrier part 10 and the display part 20 may be
disposed in this order as shown in FIG. 25. FIG. 26 illustrates an
example of the operation of the display part 20 and the barrier
part 10 according to a modification 1-6. In this modification, the
light beams output from the back light 30 enter into the barrier
part 10 first. In the entered light beams, the light beams that
pass through the open/close part 12 are modulated by the display
part 20 to output four viewpoint images.
[Modification 1-7]
[0119] In the above embodiment, the display part 20 and the back
light 30 are used. However, the embodiment is not limited to this.
Alternatively, for example, a display part such as EL (Electro
Luminescence) may be employed.
[Modification 1-8]
[0120] In the above embodiment, the sub-pixels 21R, 22B, 21G, 22R,
21B, and 22G are repeatedly disposed in this order in the
horizontal direction X. However, the embodiment is not limited to
this. Alternatively, the sub-pixels may be repeatedly disposed in
order of 21R, 22G, 21G, 22B, 21B and 22R for example, as shown in
FIG. 27; or the disposition of the sub-pixels 21 and 22 may be
changed on the line-basis as shown in FIG. 28.
[0121] Also, for example, the sub-pixels 21R, 21Q 21B may be
disposed adjacent to each other; and likewise the sub-pixels 22R,
22G, 22B may be disposed adjacent to each other as shown in FIG.
29. In this example, for example, the sub-pixels 21R and 21G are
disposed neighboring on each other being interposed by one
sub-pixel 22 in the horizontal direction X, and the sub-pixel 21B
is disposed neighboring on the interposed sub-pixel 22 in the
vertical direction Y. Likewise, for example, the sub-pixels 22R and
22G are disposed neighboring on each other being interposed by one
sub-pixel 21 in the horizontal direction X, and the sub-pixel 22B
is disposed neighboring on the interposed sub-pixel 21 in the
vertical direction Y. With this arrangement, the color balance
during ordinary display (2D display) is improved.
[Modification 1-9]
[0122] In the above embodiment, the barrier part 10 is configured
by using the open/close parts 11 and 12 capable of changing the
transmissive ratio of the light beams. Alternatively, for example,
the barrier part may be configured by using a fixed barrier which
blocks the light beam at a portion corresponding to the open/close
part 11, and opens the portion corresponding to open/close part 12
to allow the light to pass therethrough. In this case also, 3D
display can be performed same as the above embodiment (FIG. 9 or
the like). When performing ordinary display (2D display), for
example, the four sub-pixels 21 (sub-pixel group PG) and four
sub-pixels 22, which are disposed adjacent to the opening, display
one piece of pixel information; thereby 2D image can be
displayed.
[Modification 1-10]
[0123] In the above embodiments, the 3D display device of parallax
barrier system is configured. However, the embodiment is not
limited to this. Alternatively, for example, a 3D display device of
a lenticular lens system may be configured. Detailed description is
made below.
[0124] FIG. 30 illustrates an example of the operation of 3D
display by a 3D display device 9 of a lenticular lens system. The
3D display device 9 includes a lens part 90 having a plurality of
lenses 99 that refracts the light beams which are output from the
back light 30 and pass through the display part 20. When performing
3D display, in the display part 20, the four sub-pixels 21
(sub-pixel group PG), which are disposed at the portions
corresponding to each lens 99, displays four pieces of pixel
information P1-P4 corresponding to four viewpoint images,
respectively. The light beams output from the sub-pixels 21 in the
display part 20 are refracted by the lenses 99 and are output in
the respective directions.
[0125] As for the lenses 99, a lens with a fixed refraction index
or, for example, a lens configured so that the characteristic such
as refraction index is variable like a liquid crystal lens or a
liquid lens may be employed.
2. APPLICATION EXAMPLE
[0126] A description is made on an application examples of the 3D
display device described in the above embodiment and
modifications.
[0127] FIG. 31 illustrates an appearance of a television set to
which the 3D display device of the above embodiment or the like is
applied. The television set has, for example, an image display
screen part 510 including a front panel 511 and a filter glass 512.
The image display screen part 510 is constituted of a 3D display
device according to the above-described embodiment or the like.
[0128] The 3D display device of the above-described embodiment or
the like is applicable to, in addition to such television set,
electronic apparatus used in various fields including digital
cameras, note type personal computers, mobile terminal apparatuses
of mobile phones or the like, mobile game machines, video cameras
and the like. In other words, the 3D display device of the
above-described embodiment or the like is applicable to every
electronic apparatuses for displaying images used in various
fields.
[0129] It should be understood by those skilled in the art that
various modifications, combinations, sub-combinations and
alterations may occur depending on design requirements and other
factors insofar as they are within the scope of the appended claims
or the equivalents thereof.
[0130] In the above embodiments, it is configure to display four
viewpoint images in the 3D display. However, the present technology
is not limited to the above; but viewpoint images of three or less,
or viewpoint images of five or more may be displayed.
[0131] Also, in the above-described embodiments, the present
technology has been described while giving the 3D display device as
an example. However, the present technology is not limited to the
3D display device. For example, the present technology may be
applied to a multi-display. That is, in place of multiple viewpoint
images, multiple images for multiple viewers may be displayed. For
example, by displaying different images; i.e. an image to be viewed
at the left side with respect the front side perpendicular to a
display screen different from an image to be viewed at the right
side with respect the front side perpendicular to a display screen;
it is possible to achieve a multi-display.
[0132] Additionally, the present technology may also be configured
as below.
(1) A display device, including:
[0133] a display part including a pixel of a first series having a
first horizontal pixel width and a pixel of a second series having
a second horizontal pixel width smaller than the first horizontal
pixel width, the pixels of the first series and the pixels of the
second series being arrayed alternately in each of a horizontal
direction and a vertical direction; and
[0134] a light beam control part that controls a light beam from
the display part or a light beam toward the display part.
(2) The display device according to (1), wherein
[0135] the display device has a plurality of display modes
including a first display mode and a second display mode,
[0136] in the first display mode, the pixels of the first series
and the pixels of the second series display a single image, and
[0137] in the second display mode, the pixels of the first series
display a plurality of images and the pixels of the second series
display a black color.
(3) The display device according to (2), wherein the distance
between the pixels of the first series in the horizontal direction
is equal to the first horizontal pixel width. (4) The display
device according to (2), wherein the distance between the pixels of
the first series in the horizontal direction is smaller than the
first horizontal pixel width. (5) The display device according to
(2), wherein the distance between the pixels of the first series in
the horizontal direction is larger than the first horizontal pixel
width. (6) The display device according to any one of (3) to (5),
wherein a central coordinate in the horizontal direction of each
pixel of the first series is equal to a central coordinate in the
horizontal direction of a pixel of the second series neighboring on
the pixel of the first series in the vertical direction. (7) The
display device according to (1), wherein
[0138] the display device has a plurality of display modes
including a first display mode and a second display mode,
[0139] in the first display mode, the pixels of the first series
and the pixels of the second series display a single image, and
[0140] in the second display mode, the pixels of the first series
display a plurality of images and the pixels of the second series
display a gray color.
(8) The display device according to any one of (2) to (7), wherein
the light beam control part operates
[0141] in the first display mode, in manner to allow light beams
from the single image or light beams toward the single image to
pass therethrough, and
[0142] in the second display mode, in a manner to regulate light
beams from the respective images displayed on the display part or
light beams toward the respective images in a corresponding angular
direction.
(9) The display device according to any one of (1) to (8),
wherein
[0143] the light beam control part is a barrier part that allows
light to pass therethrough or blocks the same, and
[0144] the barrier part includes a plurality of liquid crystal
barriers of a first series and a plurality of liquid crystal
barriers of a second series which are switchable between an open
state and a closed state.
(10) The display device according to (9), wherein
[0145] the plurality of liquid crystal barriers of the first series
and the plurality of the liquid crystal barriers of the second
series get into a transmissive state in the first display mode,
and
[0146] the plurality of liquid crystal barriers of the first series
get into the transmissive state and the plurality of liquid crystal
barriers of the second series get into a blocking state in the
second display mode.
(11) The display device according to (10), wherein the plurality of
liquid crystal barriers of the first series and the plurality of
liquid crystal barriers of the second series extend in a
predetermined direction. (12) The display device according to (11),
wherein a width of the liquid crystal barriers of the first series
is smaller than the first horizontal pixel width. (13) The display
device according to any one of (1) to (8), wherein
[0147] the light beam control part is a barrier part that allows
light to pass therethrough or blocks the same, and
[0148] the barrier part has a plurality of fixed openings.
(14) The display device according to any one of (1) to (8), wherein
the light beam control part has a plurality of variable lenses
capable of changing a refraction index. (15) The display device
according to any one of (1) to (8), wherein the light beam control
part has a plurality of fixed lenses. (16) The display device
according to any one of (1) to (15), further including
[0149] a back light, wherein
[0150] the display part is a liquid crystal display part, and
[0151] the liquid crystal display part is disposed between the back
light and the barrier part.
(17) The display device according to any one of (1) to (15),
further including
[0152] a back light, wherein
[0153] the display part is a liquid crystal display part, and
[0154] the barrier part is disposed between the back light and the
liquid crystal display part.
(18) A display panel, including:
[0155] a pixel of a first series having a first horizontal pixel
width; and
[0156] a pixel of a second series having a second horizontal pixel
width smaller than the first horizontal pixel width, wherein
[0157] the pixels of the first series and the pixels of the second
series are arrayed alternately in each of a horizontal direction
and a vertical direction.
(19) An electronic apparatus, including:
[0158] a display unit; and
[0159] a control unit that performs operation control by using the
display unit, wherein
[0160] the display unit includes [0161] a display part in which a
pixel of a first series having a first horizontal pixel width and a
pixel of a second series having a second horizontal pixel width
smaller than the first horizontal pixel width are arrayed
alternately in each of a horizontal direction and a vertical
direction; and [0162] a light beam control part that controls a
light beam from the display part or a light beam toward the display
part.
[0163] The present disclosure contains subject matter related to
that disclosed in Japanese Priority Patent Application JP
2011-214867 filed in the Japan Patent Office on Sep. 29, 2011, the
entire content of which is hereby incorporated by reference.
* * * * *