U.S. patent application number 14/518163 was filed with the patent office on 2016-02-25 for pixel array and display device.
This patent application is currently assigned to BOE TECHNOLOGY GROUP CO., LTD.. The applicant listed for this patent is BOE TECHNOLOGY GROUP CO., LTD.. Invention is credited to Hyunsic CHOI, Chulgyu JUNG, Heecheol KIM.
Application Number | 20160056203 14/518163 |
Document ID | / |
Family ID | 51910150 |
Filed Date | 2016-02-25 |
United States Patent
Application |
20160056203 |
Kind Code |
A1 |
KIM; Heecheol ; et
al. |
February 25, 2016 |
PIXEL ARRAY AND DISPLAY DEVICE
Abstract
A pixel array and a display device are provided. The pixel array
includes a two-dimensional array that is formed by arranging a
plurality of color sub-pixels and a plurality of white sub-pixels
in the row direction and in the column direction, the color
sub-pixels include color sub-pixels in three different colors. For
color sub-pixels in each color in each row, color sub-pixels with
the same color in the same row are arranged so that, the
odd-numbered column sub-pixel and the even-numbered column
sub-pixel alternate one by one, or they are disposed by way of
groups each including two odd-numbered column sub-pixels
alternating with even-numbered column sub-pixels or by way of
groups each including two even-numbered column sub-pixels
alternating with odd-numbered column sub-pixels.
Inventors: |
KIM; Heecheol; (Beijing,
CN) ; JUNG; Chulgyu; (Beijing, CN) ; CHOI;
Hyunsic; (Beijing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
BOE TECHNOLOGY GROUP CO., LTD. |
Beijing |
|
CN |
|
|
Assignee: |
BOE TECHNOLOGY GROUP CO.,
LTD.
Beijing
CN
|
Family ID: |
51910150 |
Appl. No.: |
14/518163 |
Filed: |
October 20, 2014 |
Current U.S.
Class: |
257/89 |
Current CPC
Class: |
G02F 1/133514 20130101;
G02F 2201/52 20130101 |
International
Class: |
H01L 27/15 20060101
H01L027/15 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 19, 2014 |
CN |
201410409400.8 |
Claims
1: A pixel array, comprising a two-dimensional array that is formed
by arranging a plurality of color sub-pixels and a plurality of
white sub-pixels in a row direction and in a column direction, the
plurality of color sub-pixels include color sub-pixels in three
different colors, wherein, in a same row, color sub-pixels with a
same color lie in odd-numbered columns and even-numbered columns of
the two-dimensional array, respectively, so as to form odd-numbered
column sub-pixels and even-numbered column sub-pixels; for color
sub-pixels with each color in each row, color sub-pixels with the
same color in the same row are arranged so that, the odd-numbered
column sub-pixels and the even-numbered column sub-pixels alternate
one by one, or they are disposed by way of groups each including
two odd-numbered column sub-pixels alternating with even-numbered
column sub-pixels or by way of groups each including two
even-numbered column sub-pixels alternating with odd-numbered
column sub-pixels.
2: The pixel array according to claim 1, wherein, as for sub-pixels
of any one kind among the color sub-pixels in three different
colors and the white sub-pixels, in the same row, adjacent
sub-pixels with the same color are situated in odd-numbered columns
and even-numbered columns of the two-dimensional array,
respectively.
3: The pixel array according to claim 1, wherein, three color
sub-pixels with different colors and one white sub-pixel constitute
one pixel group.
4: The pixel array according to claim 2, wherein, three color
sub-pixels with different colors and one white sub-pixel constitute
one pixel group.
5: The pixel array according to claim 3, wherein, in each row of
the two-dimensional array, a plurality of the pixel groups are
arranged in sequence along the row direction.
6: The pixel array according to claim 5, wherein, in each of the
pixel groups, the three color sub-pixels with different colors and
the one white sub-pixel are classified into a first pixel sub-group
and a second pixel sub-group that are arranged in the row
direction, the first pixel sub-group and the second pixel sub-group
include two adjacent sub-pixels, respectively; in any two adjacent
pixel groups, the two adjacent sub-pixels in the first pixel
sub-groups are arranged in different orders along the row
direction, and the two adjacent sub-pixels in the second pixel
sub-groups are arranged in different orders along the row
direction.
7: The pixel array according to claim 6, wherein, the plurality of
color sub-pixels include a red sub-pixel, a green sub-pixel and a
blue sub-pixel, the first pixel sub-group includes one red
sub-pixel and one white sub-pixel, and the second pixel sub-group
includes one blue sub-pixel and one green sub-pixel.
8: The pixel array according to claim 6, wherein, in each row of
the two-dimensional array, a repetitive unit of the pixel
arrangement is at least one of the following repetitive units:
R-W-B-G-W-R-G-B W-R-G-B-R-W-B-G G-W-R-B-W-G-B-R W-G-B-R-G-W-R-B
B-W-R-G-W-B-G-R W-B-G-R-B-W-R-G, wherein, R, G, B and W represent a
red sub-pixel, a green sub-pixel, a blue sub-pixel and a white
sub-pixel, respectively.
9: The pixel array according to claim 7, wherein, in each row of
the two-dimensional array, a repetitive unit of the pixel
arrangement is at least one of the following repetitive units:
R-W-B-G-W-R-G-B W-R-G-B-R-W-B-G G-W-R-B-W-G-B-R W-G-B-R-G-W-R-B
B-W-R-G-W-B-G-R W-B-G-R-B-W-R-G, wherein, R, G, B and W represent a
red sub-pixel, a green sub-pixel, a blue sub-pixel and a white
sub-pixel, respectively.
10: The pixel array according to claim 1, wherein, for color
sub-pixels in each color in each row, color sub-pixels with the
same color in the same row are arranged so that they are disposed
by way of groups each including two odd-numbered column sub-pixels
alternating with even-numbered column sub-pixels or by way of
groups each including two even-numbered column sub-pixels
alternating with odd-numbered column sub-pixels.
11: The pixel array according to claim 1, wherein, the pixel array
includes a 12.times.4 two-dimensional repetitive unit, in the
two-dimensional repetitive unit, a first-colored pixel column, a
second-colored pixel column and a third-colored pixel column are
included, a pixel column in each color is composed of three color
sub-pixels with the same color and one white sub-pixel, and the
first-colored pixel column, the second-colored pixel column and the
third-colored pixel column are repetitively disposed in this order;
in the first to fourth pixel columns, the white sub-pixel lies in a
first row, a second row, a third row and a fourth row of the
two-dimensional repetitive unit, respectively; in the fifth to
eighth pixel columns, the white sub-pixel lies in the first row,
the second row, the third row and the fourth row of the
two-dimensional array, respectively; and in the ninth to twelfth
pixel columns, the white sub-pixel lies in the first row, the
second row, the third row and the fourth row of the two-dimensional
array, respectively.
12: The pixel array according to claim 11, wherein, the
two-dimensional repetitive unit is repetitively disposed in the row
direction and the column direction of the two-dimensional
array.
13: The pixel array according to claim 1, wherein, three color
sub-pixels with different colors and one white sub-pixel constitute
one pixel group, three adjacent pixel groups in the row direction
of the two-dimensional array constitute one repetitive unit; in
each row of pixels, the white sub-pixel is arranged in a same
position in each pixel group; in each repetitive unit, sub-pixels
in each color are arranged in positions different from each other
in the three adjacent pixel groups.
14: The pixel array according to claim 13, wherein, for pixels in
different rows, position of a white sub-pixel in each pixel group
may be the same or differ.
15: A display device, comprising a pixel array including a
two-dimensional array that is formed by arranging a plurality of
color sub-pixels and a plurality of white sub-pixels in a row
direction and in a column direction, the plurality of color
sub-pixels include color sub-pixels in three different colors,
wherein, in a same row, color sub-pixels with a same color lie in
odd-numbered columns and even-numbered columns of the
two-dimensional array, respectively, so as to form odd-numbered
column sub-pixels and even-numbered column sub-pixels; for color
sub-pixels with each color in each row, color sub-pixels with the
same color in the same row are arranged so that, the odd-numbered
column sub-pixels and the even-numbered column sub-pixels alternate
one by one, or they are disposed by way of groups each including
two odd-numbered column sub-pixels alternating with even-numbered
column sub-pixels or by way of groups each including two
even-numbered column sub-pixels alternating with odd-numbered
column sub-pixels.
16: The display device according to claim 15, wherein, as for
sub-pixels of any one kind among the color sub-pixels in three
different colors and the white sub-pixels, in the same row,
adjacent sub-pixels with the same color are situated in
odd-numbered columns and even-numbered columns of the
two-dimensional array, respectively.
17: The display device according to claim 15, wherein, three color
sub-pixels with different colors and one white sub-pixel constitute
one pixel group.
18: The display device according to claim 17, wherein, in each row
of the two-dimensional array, a plurality of the pixel groups are
arranged in sequence along the row direction.
19: The display device according to claim 18, wherein, in each of
the pixel groups, the three color sub-pixels with different colors
and the one white sub-pixel are classified into a first pixel
sub-group and a second pixel sub-group that are arranged in the row
direction, the first pixel sub-group and the second pixel sub-group
include two adjacent sub-pixels, respectively; in any two adjacent
pixel groups, the two adjacent sub-pixels in the first pixel
sub-groups are arranged in different orders along the row
direction, and the two adjacent sub-pixels in the second pixel
sub-groups are arranged in different orders along the row
direction.
20: The display device according to claim 19, wherein, in each row
of the two-dimensional array, a repetitive unit of the pixel
arrangement is at least one of the following repetitive units:
R-W-B-G-W-R-G-B W-R-G-B-R-W-B-G G-W-R-B-W-G-B-R W-G-B-R-G-W-R-B
B-W-R-G-W-B-G-R W-B-G-R-B-W-R-G, wherein, R, G, B and W represent a
red sub-pixel, a green sub-pixel, a blue sub-pixel and a white
sub-pixel, respectively.
Description
TECHNICAL FIELD
[0001] Embodiments of the present invention relate to a pixel array
and a display device that includes the pixel array.
BACKGROUND
[0002] As a mainstream display at present, Liquid Crystal Displays
have occupied the chief market for flat panel display by virtue of
the advantages of small volume, thin thickness, low power
consumption, etc., and the liquid crystal display technology is
also in course of continuous development.
[0003] FIG. 1 illustrates a pixel array of RGB sub-pixels of an
existing liquid crystal display and a drive mode thereof. In the
course of drive, in order to prevent a crosstalk phenomenon between
adjacent sub-pixels, it is required that polarities of image
signals applied across the adjacent sub-pixels be opposite. As
illustrated in FIG. 1, in each row of sub-pixels, polarities of
applied image signals change alternately between positive and
negative.
[0004] In order to increase brightness of liquid crystal displays,
a pixel array of RGBW sub-pixels has been proposed, namely, on the
basis of an original RGB pixel array, a white (w) sub-pixel is
added. FIG. 2 illustrates a pixel array of RGBW. In each row of
sub-pixels, they are arranged repetitively in the `R-W-B-G`
repetitive unit. In such a pixel array, a drive mode similar to
that illustrated in FIG. 1 is carried out, namely, signal data for
adjacent pixels have opposite polarities.
SUMMARY
[0005] According to an embodiment of the invention, there is
provided a pixel array, comprising a two-dimensional array that is
formed by arranging a plurality of color sub-pixels and a plurality
of white sub-pixels in a row direction and in a column direction,
the color sub-pixels include color sub-pixels in three different
colors, wherein,
[0006] in a same row, color sub-pixels with a same color lie in
odd-numbered columns and even-numbered columns of the
two-dimensional array, respectively, so as to form odd-numbered
column sub-pixels and even-numbered column sub-pixels;
[0007] for color sub-pixels with each color in each row, color
sub-pixels with the same color in the same row are arranged so
that, the odd-numbered column sub-pixels and the even-numbered
column sub-pixels alternate one by one, or they are disposed by way
of groups each including two odd-numbered column sub-pixels
alternating with even-numbered column sub-pixels or by way of
groups each including two even-numbered column sub-pixels
alternating with odd-numbered column sub-pixels.
[0008] In an example, as for sub-pixels of any one kind among the
color sub-pixels in three different colors and the white
sub-pixels, in the same row, adjacent sub-pixels with the same
color are situated in odd-numbered columns and even-numbered
columns of the two-dimensional array, respectively.
[0009] In an example, three color sub-pixels with different colors
and bne white sub-pixel constitute one pixel group.
[0010] In an example, in each row of the two-dimensional array, a
plurality of the pixel groups are arranged in sequence along the
row direction.
[0011] In an example, in each of the pixel groups, the three color
sub-pixels with different colors and the one white sub-pixel are
classified into a first pixel sub-group and a second pixel
sub-group that are arranged in the row direction, the first pixel
sub-group and the second pixel sub-group include two adjacent
sub-pixels, respectively; in any two adjacent pixel groups, the two
adjacent sub-pixels in the first pixel sub-groups are arranged in
different orders along the row direction, and the two adjacent
sub-pixels in the second pixel sub-groups are arranged in different
orders along the row direction.
[0012] In an example, the color sub-pixels include a red sub-pixel,
a green sub-pixel and a blue sub-pixel, the first pixel sub-group
includes one red sub-pixel and one white sub-pixel, and the second
pixel sub-group includes one blue sub-pixel and one green
sub-pixel.
[0013] In an example, in each row of the two-dimensional array, a
repetitive unit of the pixel arrangement is at least one of the
following repetitive units: R-W-B-G-W-R-G-B W-R-G-B-R-W-B-G
G-W-R-B-W-G-B-R W-G-B-R-G-W-R-B B-W-R-G-W-B-G-R W-B-G-R-B-W-R-G,
wherein, R, G, B and W represent a red sub-pixel, a green
sub-pixel, a blue sub-pixel and a white sub-pixel,
respectively.
[0014] In an example, for color sub-pixels in each color in each
row, color sub-pixels with the same color in the same row are
arranged so that they are disposed by way of groups each including
two odd-numbered column sub-pixels alternating with even-numbered
column sub-pixels or by way of groups each including two
even-numbered column sub-pixels alternating with odd-numbered
column sub-pixels.
[0015] In an example, the pixel array includes a 12.times.4
two-dimensional repetitive unit, in the two-dimensional repetitive
unit, a first-colored pixel column, a second-colored pixel column
and a third-colored pixel column are included, a pixel column in
each color is composed of three color sub-pixels with the same
color and one white sub-pixel, and the first-colored pixel column,
the second-colored pixel column and the third-colored pixel column
are repetitively disposed in this order; in the first to fourth
pixel columns, the white sub-pixel lies in a first row, a second
row, a third row and a fourth row of the two-dimensional repetitive
unit, respectively; in the fifth to eighth pixel columns, the white
sub-pixel lies in the first row, the second row, the third row and
the fourth row of the two-dimensional array, respectively; and in
the ninth to twelfth pixel columns, the white sub-pixel lies in the
first row, the second row, the third row and the fourth row of the
two-dimensional array, respectively.
[0016] In an example, the two-dimensional repetitive unit is
repetitively disposed in the row direction and the column direction
of the two-dimensional array.
[0017] In an example, three color sub-pixels with different colors
and one white sub-pixel constitute one pixel group, three adjacent
pixel groups in the row direction of the two-dimensional array
constitute one repetitive unit; in each row of pixels, the white
sub-pixel is arranged in a same position in each pixel group; in
each repetitive unit, sub-pixels in each color are arranged in
positions different from each other in the three adjacent pixel
groups.
[0018] In an example, for pixels in different rows, position of a
white sub-pixel in each pixel group may be the same or differ.
[0019] According to another embodiment of the invention, there is
provided a display device, comprising the pixel array according to
any of the above embodiments.
[0020] In an example, the display device is a liquid crystal
display, and the color sub-pixels include color filter in
corresponding colors.
[0021] In an example, the display device includes a drive unit,
configured to conduct a scanning in line sequence on the pixel
array, and when sub-pixels in each row are driven, polarities of
image data signals applied to the sub-pixels vary alternately in
sequence.
[0022] In an example, the liquid crystal display is an ADS mode
display.
BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to illustrate the technical solution of the
embodiments of the invention more clearly, the drawings of the
embodiments will be briefly described below; it is obvious that the
drawings as described below are only related to some embodiments of
the invention, but not limitative of the invention.
[0024] FIG. 1 is a schematic view illustrating a RGB pixel
array;
[0025] FIG. 2 is a schematic view illustrating a RGBW pixel
array;
[0026] FIG. 3 is a schematic view illustrating a pixel array
according to the first embodiment of the invention;
[0027] FIG. 4 is a schematic view illustrating a pixel array
according to the second embodiment of the invention;
[0028] FIG. 5 is a schematic view illustrating a pixel array
according to the third embodiment of the invention;
[0029] FIGS. 6(a) and 6(b) are schematic views illustrating a
normal display picture and a crosstalk picture.
DETAILED DESCRIPTION
[0030] In order to make objects, technical details and advantages
of the embodiments of the invention apparent, hereinafter, the
technical solutions of the embodiments of the invention will be
described in a clearly and fully understandable way in connection
with the drawings related to the embodiments of the invention. It
is obvious that the described embodiments are just a part but not
all of the embodiments of the invention. Based on the described
embodiments of the invention, those ordinarily skilled in the art
can obtain other embodiment(s), without any inventive work, which
should be within the scope sought for protection by the
invention.
[0031] When a pixel array as illustrated in FIG. 2 works in such a
drive mode that polarities of data signals across adjacent
sub-pixels are opposite, because each repetitive unit includes four
(even-numbered) sub-pixels (RGBW), sub-pixels with the same color
in each row of sub-pixels have the same polarity. It is found by
inventors that, crosstalk may be produced by such a construction
when it appears in a specific picture pattern. The reason for the
production of crosstalk is that, when adjacent sub-pixels with the
same color are each charged in the same polarity in unit charge
time of sub-pixels, under the influence of a data electrode, a
common electrode shifts toward one side, resulting in a change of
picture brightness. Upon drive, in the row direction, the polarity
for each of sub-pixels may alternate between positive and negative,
so as to achieve a better drive. Thus, the polarity of an image
signal applied to each of sub-pixels corresponds to an odd-numbered
column or even-numbered column position where the sub-pixel is
located.
[0032] In the present specification, it is mainly directed to a
pixel array including color sib-pixels and a white sub-pixel (W).
In the following embodiments, descriptions will be given with
reference to an example in which the color sub-pixels include a red
sub-pixel (R), a green sub-pixel (G) and a blue sub-pixel (B).
However, embodiments according to the invention are not limited to
the above color sub-pixels, and for example, color sub-pixels may
include sub-pixels in other three colors for color display, such
as, a magenta sub-pixel, a cyan sub-pixel and a yellow
sub-pixel.
[0033] In order to avoid crosstalk, it is preferred that the
following drive can be realized for sub-pixels in each color among
color sub-pixels, namely, drive polarities for the adjacent
sub-pixels with the same color change alternately. For such a drive
mode that polarities of positive and negative alternate, for
example, adjacent sub-pixels with the same color lie in an
odd-numbered column and an even-numbered column, respectively. As
such, a crosstalk issue resulted from the fact that adjacent
sub-pixels with the same color have the same polarity can be
avoided. However, when polarities of sub-pixels with the same color
varying alternately can be realized only for color sub-pixels, a
function of preventing crosstalk may also be served. That is,
embodiments of the invention are directed to a pixel array that
includes a two-dimensional array formed by a plurality of color
sub-pixels and a plurality of white sub-pixels. In the same row,
color sub-pixels with the same color lie in odd-numbered columns
and even-numbered columns of the two-dimensional array,
respectively, so as to form odd-numbered column sub-pixels and
even-numbered column sub-pixels. For color sub-pixels in each color
in each row, color sub-pixels with the same color in the same row
are arranged so that, the odd-numbered column sub-pixels and the
even-numbered column sub-pixels alternate one by one, or they are
disposed by way of groups each including two odd-numbered column
sub-pixels alternating with even-numbered column sub-pixels or by
way of groups each including two even-numbered column sub-pixels
alternating with odd-numbered column sub-pixels.
[0034] In the specification, the pixel array refers to the
arrangement mode of sub-pixels in various colors. By way of
adjusting the arrangement mode of sub-pixels in various colors,
crosstalk resulted from the fact that adjacent sub-pixels with the
same color have the same polarity upon polarity inverting drive can
be avoided by the prevent invention. The pixel array in the present
invention can be applied to various flat panel display devices. For
example, it can be applied to various liquid crystal display
devices. In a liquid crystal display device, color in various
sub-pixels is realized by color filters of corresponding colors.
After or before light from a backlight is modulated by a liquid
crystal layer, they pass through color filters of various colors to
generate light in corresponding colors. With regard to a RGBW pixel
array, through proportion allocation of various lights emitted by a
R sub-pixel, a G sub-pixel, a B sub-pixel and a W sub-pixel, the
color display of a variety of colors is achieved. Of course, for
sub-pixels of each color, besides color filters of a corresponding
color, a variety of other requisite components may also be
included, such as, a thin film transistor functioning as a switch,
a data line, a gate line, and so on. Embodiments according to the
invention focus on the arrangement relationship between sub-pixels
of various colors, and there is not a specific limit on the
concrete structure of sub-pixels of each color. Therefore,
descriptions of the concrete structure of sub-pixels are omitted in
the specification.
[0035] Hereinafter, several embodiments according to the invention
will be described in more detail, so that technical solutions
according to the invention become clearer.
First Embodiment
[0036] As illustrated in FIG. 3, in a two-dimensional array
composed by sub-pixels of a variety of colors, color sub-pixels in
three different colors and one white sub-pixel constitute one pixel
group. For example, each pixel group includes one red sub-pixel,
one green sub-pixel, one blue sub-pixel and one white sub-pixel.
Sub-pixels in each pixel group are sequentially arranged in the row
direction of the two-dimensional array, and a plurality of pixel
groups are also sequentially arranged in the row direction. It is
to be noted that, the pixel configuration illustrated in FIG. 3
merely schematically illustrates a part of the pixel array, rather
than full of the pixel array. For example, in the pixel
configuration of FIG. 3, three pixel groups arranged consecutively
are included in each row, and each pixel group is composed by one
red sub-pixel, one green sub-pixel, one blue sub-pixel and one
white sub-pixel.
[0037] For each pixel group, it can be divided into two pixel
sub-groups arranged sequentially in the row direction, wherein, one
pixel sub-group includes two sub-pixels in the pixel group, and the
other pixel sub-group includes the other two sub-pixels in the
pixel group. Four pixels in each pixel group are classified into a
first pixel sub-group and a second pixel sub-group arranged in the
row direction. For example, as illustrated in FIG. 3, for each
pixel group, the first pixel sub-group includes a red sub-pixel and
a white sub-pixel; and the second pixel sub-group includes a blue
sub-pixel and a green sub-pixel. However, embodiments of the
invention are not limited thereto, the first pixel sub-group may
include sub-pixels of any two colors, and the second pixel
sub-group may include sub-pixels of the remaining two colors. For
example, the first pixel sub-group may include a green sub-pixel
and a white sub-pixel, the second pixel sub-group may include a
blue sub-pixel and a red sub-pixel; or, the first pixel sub-group
may include a green sub-pixel and a red sub-pixel, the second pixel
sub-group may include a blue sub-pixel and a white sub-pixel; or,
the first pixel sub-group may include a green sub-pixel and a blue
sub-pixel, the second pixel sub-group may include a red sub-pixel
and a white sub-pixel.
[0038] As illustrated in FIG. 3, in pixel groups that are adjacent
in the row direction, sub-pixels in the first pixel sub-groups in
the two pixel groups have different arranging orders in the row
direction, and sub-pixels in the second pixel sub-groups in the two
pixel groups have different arranging orders in the row direction.
For example, three pixel groups are included in a first row in FIG.
3. For the sake of illustrative convenience, they are named as a
first pixel group PG1, a second pixel group PG2 and a third pixel
group PG3 in the left-to-right order, respectively. With regard to
the first pixel group PG1 and the second pixel group PG2 that are
adjacent, the case with a first pixel sub-group PSG1 in the first
pixel group PG1 is that a red sub-pixel is ahead of a white
sub-pixel; the case with a first pixel sub-group PSG1 in the second
pixel group PG2 is that a white sub-pixel is ahead of a red
sub-pixel; the case with a second pixel sub-group PSG2 in the first
pixel group PG1 is that a blue sub-pixel is ahead of a green
sub-pixel; the case with a second pixel sub-group PSG2 in the
second pixel group PG2 is that a green sub-pixel is ahead of a blue
sub-pixel. Similarly, with regard to the second pixel group PG2 and
the third pixel group PG3 that are adjacent, the case with a first
pixel sub-group PSG1 in the second pixel group PG2 is that a white
sub-pixel is ahead of a red sub-pixel; the case with a first pixel
sub-group PSG1 in the third pixel group PG3 is that a red sub-pixel
is ahead of a white sub-pixel; the case with a second pixel
sub-group PSG2 in the second pixel group PG2 is that a green
sub-pixel is ahead of a white sub-pixel; the case with a second
pixel sub-group PSG2 in the third pixel group PG3 is that a blue
sub-pixel is ahead of a green sub-pixel. For adjacent pixel groups
in other row, they have an arranging mode similar to that stated
above. However, embodiments according to the invention are not
limited to such an order, as long as first pixel sub-groups in
adjacent pixel groups have different arranging orders, and second
pixel sub-groups in the two pixel groups have different arranging
orders.
[0039] In addition, for pixel configuration in different rows,
adjacent rows may have exactly the same pixel arrangement.
Certainly, adjacent rows may also have different pixel
arrangements. In the embodiment, it is necessary for each row to
meet such a requirement that first pixel sub-groups in adjacent
pixel groups have different arranging orders, and second pixel
sub-groups in the two pixel groups have different arranging
orders.
[0040] As can be seen from FIG. 3, for adjacent sub-pixels with the
same color, they are located in odd-numbered columns and
even-numbered columns, respectively. For example, in a first row in
FIG. 3, in the left-to-right order in the figure, the first red
sub-pixel lies in an odd-numbered column, the second red sub-pixel
lies in an even-numbered column, the third red sub-pixel lies in an
odd-numbered column; the first white sub-pixel lies in an
even-numbered column, the second white sub-pixel lies in an
odd-numbered column, the third white sub-pixel lies in an
even-numbered column; the first blue sub-pixel lies in an
odd-numbered column, the second blue sub-pixel lies in an
even-numbered column, the third blue sub-pixel lies in an
odd-numbered column; the first green sub-pixel lies in an
even-numbered column, the second green sub-pixel lies in an
odd-numbered column, the third green sub-pixel lies in an
even-numbered column. For other rows, there is an arranging mode
similar to the above. That is, for sub-pixels of each color
(including color pixels and white sub-pixels), adjacent sub-pixels
with the same color are located in an odd-numbered column and an
even-numbered column, respectively.
[0041] In each row, sub-pixels with the same color are disposed in
odd-numbered columns and even-numbered columns of the
two-dimensional array, respectively. For the sake of illustrative
convenience, a sub-pixel situated in an odd-numbered column is
referred to as an odd-numbered column sub-pixel, and a sub-pixel
situated in an even-numbered column is referred to as an
even-numbered sub-pixel. As can be seen from FIG. 3, in the same
row, as regards sub-pixels with the same color (including color
sub-pixels and white sub-pixels), the odd-numbered column
sub-pixels and the even-numbered column sub-pixels alternate one by
one. That is, they are disposed repetitively in a repetitive manner
`one odd-numbered column sub-pixel, one even-numbered column
sub-pixel, one odd-numbered column sub-pixel, one even-numbered
column sub-pixel . . . `. For example, with regard to red
sub-pixels in the first row in FIG. 3, they are a red odd-numbered
column sub-pixel, a red even-numbered column sub-pixel, a red
odd-numbered column sub-pixel . . . in this order. With regard to
white sub-pixels in the first row in FIG. 3, they are a white
even-numbered column sub-pixel, a white odd-numbered column
sub-pixel, a white even-numbered column sub-pixel . . . in this
order. With regard to blue and green sub-pixels in the first row,
they have arranging modes similar to those of the red and white
sub-pixels as stated above, and details are omitted here.
[0042] Therefore, as regards the pixel array according to the
present embodiment, when such a drive mode that polarity of a drive
voltage (an image data signal) varies alternately is adopted, the
polarity of a drive voltage for an odd-numbered column and the
polarity of a drive voltage for an even-numbered column correspond
to a positive polarity and a negative polarity, respectively. Owing
to the fact that in the embodiment, for adjacent sub-pixels with
the same color, they are located in an odd-numbered column and an
even-numbered column of a two-dimensional array, respectively,
drive voltages for adjacent sub-pixels with the same color have
different polarities. As such, crosstalk resulted from the fact
that adjacent sub-pixels with the same color have the same polarity
can be prevented.
[0043] As can be known from the above descriptions of the pixel
array of the present embodiment, in each row of the two-dimensional
array of the pixel array, the repetitive unit of the pixel
arrangement may be at least one of the following repetitive units:
R-W-B-G-W-R-G-B W-R-G-B-R-W-B-G G-W-R-B-W-G-B-R W-G-B-R-G-W-R-B
B-W-R-G-W-B-G-R W-B-G-R-B-W-R-G, wherein, R, G, B and W represent a
red sub-pixel, a green sub-pixel, a blue sub-pixel and a white
sub-pixel, respectively.
Second Embodiment
[0044] In the above first embodiment, with regard to sub-pixels of
all colors (including color sub-pixels and white sub-pixels),
adjacent sub-pixels with the same color are located in an
odd-numbered row and an even-numbered row, respectively. That is,
the column where sub-pixels of the same color are located varies
alternately by way of odd one alternating with even one. However,
in case of color sub-pixels with the same color, in the same row,
if they are disposed alternately by way of groups each including
two odd-numbered column sub-pixels alternating with even-numbered
column sub-pixels or groups each including two even-numbered column
sub-pixels alternating with odd-numbered column sub-pixels,
crosstalk can also be prevented. As can be known from the principle
of a RGBW pixel construction, W sub-pixels are to be driven with
the aim of increasing brightness, and there is no such case where
only W sub-pixels are driven. Only in the case that all of R, G and
B sub-pixels are driven, W sub-pixels are driven. In this case, the
average value of positive and negative polarities for all the
pixels in the same row approximates to zero. Therefore, in terms of
a white sub-pixel, the polarity issue when it is driven may not be
taken into consideration separately. According to the second
embodiment of the invention, there is provided a pixel array
configured in the above mode, which will be described in detail
hereinafter.
[0045] For example, the pixel array includes a 12.times.4
two-dimensional repetitive unit. FIG. 4 illustrates the
two-dimensional repetitive unit in the pixel array. In the
two-dimensional repetitive unit, a first-colored pixel column, a
second-colored pixel column and a third-colored pixel column are
included, a pixel column in each color is composed of three color
sub-pixels with the same color and one white sub-pixel, and the
first-colored pixel column, the second-colored pixel column and the
third-colored pixel column are repetitively disposed in this order.
In the first to fourth pixel columns, the white sub-pixel lies in a
first row, a second row, a third row and a fourth row of the
two-dimensional repetitive unit, respectively; in the fifth to
eighth pixel columns, the white sub-pixel lies in the first row,
the second row, the third row and the fourth row of the
two-dimensional array, respectively; and in the ninth to twelfth
pixel columns, the white sub-pixel lies in the first row, the
second row, the third row and the fourth row of the two-dimensional
array, respectively.
[0046] The above two-dimensional repetitive unit can be
repetitively disposed in the row and column directions, so as to
constitute a pixel array that is two-dimensionally arranged. As can
be seen from FIG. 4, in each row, white sub-pixels each are
situated in an odd-numbered column or each are situated in an
even-numbered column. That is, when they are driven in alternate
positive and negative polarities, drive voltages for white
sub-pixels may be in the same polarity.
[0047] For example, in the first row, consecutive red sub-pixels
lie in an even-numbered column, an odd-numbered column and an
even-numbered column, respectively, and if the repetitive unit is
repeated in the row direction, then locations are an even-numbered
column, an odd-numbered column, an even-numbered column, an
even-numbered column, an odd-numbered column, an even-numbered
column, an even-numbered column, an odd-numbered column, an
even-numbered column . . . in turn. Therefore, for red sub-pixels
in the first row, they are disposed by way of groups each including
two even-numbered column sub-pixels alternating with odd-numbered
column sub-pixels.
[0048] For example, in the first row, consecutive blue sub-pixels
lie in an odd-numbered column, an even-numbered column and an
even-numbered column, respectively, and if the repetitive unit is
repeated in the row direction, then locations are an odd-numbered
column, an even-numbered column and an even-numbered column, an
odd-numbered column, an even-numbered column and an even-numbered
column, an odd-numbered column, an even-numbered column and an
even-numbered column . . . in turn. Therefore, for blue sub-pixels
in the first row, they are disposed by way of groups each including
two even-numbered column sub-pixels alternating with odd-numbered
column sub-pixels. In addition, in the first row, green sub-pixels
also have an arrangement similar to that stated above, and details
are omitted here.
[0049] For example, in a second row, consecutive blue sub-pixels
lie in an odd-numbered column, an odd-numbered column and an
even-numbered column, respectively, and if the repetitive unit is
repeated in the row direction, then locations are an odd-numbered
column, an odd-numbered column and an even-numbered column, an
odd-numbered column, an odd-numbered column and an even-numbered
column, an odd-numbered column, an odd-numbered column and an
even-numbered column . . . in turn. Therefore, for blue sub-pixels
in the second row, they are disposed by way of groups each
including two odd-numbered column sub-pixels alternating with
even-numbered column sub-pixels.
[0050] Therefore, in the pixel array of the second embodiment, with
regard to color sub-pixels in each row, in the same row, they are
disposed by way of groups each including two odd-numbered column
sub-pixels alternating with even-numbered column sub-pixels or by
way of groups each including two even-numbered column sub-pixels
alternating with odd-numbered column sub-pixels.
[0051] In fact, in such a drive mode that an image data signal is
applied in alternate positive and negative polarities, an
odd-numbered column or even-numbered column position where a
sub-pixel is located just corresponds to positive or negative of
the driving polarity. In a pixel array according to the embodiment,
polarities of sub-pixels with the same color in the same row also
vary, but their polarities vary alternately by way of two positive
one negative or two negative one positive. With this construction,
a crosstalk phenomenon can also be prevented.
Third Embodiment
[0052] FIG. 5 illustrates a part of a pixel array according to
another embodiment of the invention. In fact, the arranging mode
for each row of the pixel array according to the embodiment is
similar to the arranging mode for the first row or the fourth row
in the pixel array of FIG. 4.
[0053] As illustrated in FIG. 5, three color sub-pixels with
different colors and one white sub-pixel constitute one pixel
group. In the row direction of the two-dimensional array of the
pixel array, three adjacent pixel groups constitute one repetitive
unit. In each row of pixels, white sub-pixels of each pixel group
have the same arranging position. `Same arranging position` here
refers to a relative position of the sub-pixel in the pixel group.
For example, in a first row in FIG. 5, the white sub-pixel in each
pixel group is at the location of the first sub-pixel of a
respective pixel group. In a second row, the white sub-pixel in
each pixel group is at the location of the second sub-pixel of a
respective pixel group. However, there is no corresponding
relationship between the arranging position of a white sub-pixel
and the row number, and it is only required that the arranging
positions of white sub-pixels in respective pixel groups in the
same row be the same.
[0054] In each repetitive unit, the arranging positions of
sub-pixels in each color in the three pixel groups are different
from each other. For example, in the first row in FIG. 5, a green
sub-pixel of a first pixel group PG1 is at the location of the
second sub-pixel, a green sub-pixel of a second pixel group PG2 is
at the location of the fourth sub-pixel, and a green sub-pixel of a
third pixel group PG3 is at the location of the third sub-pixel; a
blue sub-pixel of the first pixel group PG1 is at the location of
the third sub-pixel, a blue sub-pixel of the second pixel group PG2
is at the location of the second sub-pixel, and a blue sub-pixel of
the third pixel group PG3 is at the location of the fourth
sub-pixel; a red sub-pixel of the first pixel group PG1 is at the
location of the fourth sub-pixel, a red sub-pixel of the second
pixel group PG2 is at the location of the third sub-pixel, and a
red sub-pixel of the third pixel group PG3 is at the location of
the second sub-pixel. As for a second row to a fourth row, they
have arranging modes similar to that of the first row, and details
are omitted here.
[0055] For example, in pixels in different rows, the position of a
white sub-pixel in each sub-pixel group may be the same or
differs.
[0056] As seen from the pixel array of FIG. 5, with regard to color
sub-pixels in each color in each row, color sub-pixels with the
same color in the same row are arranged so that they are disposed
alternately by way of groups each including two odd-numbered column
sub-pixels alternating with even-numbered column sub-pixels or by
way of groups each including two even-numbered column sub-pixels
alternating with odd-numbered column sub-pixels. In such a drive
mode that an image data signal is applied in alternate positive and
negative polarities, an odd-numbered column or even-numbered column
position where a sub-pixel is located just corresponds to positive
or negative of the driving polarity. In a pixel array according to
the embodiment, polarities of sub-pixels with the same color in the
same row also vary, but their polarities vary alternately by way of
two positive one negative or two negative one positive. With this
construction, a crosstalk phenomenon can also be prevented.
[0057] Comparison Between a Normal Picture and a Crosstalk
Picture
[0058] FIG. 6(a) and FIG. 6(b) are a schematic view illustrating a
picture situation of a pixel array according to embodiments of the
invention and a schematic view illustrating a picture situation of
a pixel array according to that illustrated in FIG. 2,
respectively. FIG. 6(a) indicates a normal picture displayed by the
pixel array according to embodiments of the invention, wherein, a
black rectangle in the middle denotes a black display zone, and
grey around it denotes a display zone in a certain color (such as,
red). As illustrated in FIG. 6(b), in the RGBW pixel array
illustrated in FIG. 2, in such a drive mode that an image data
signal is applied in alternate positive and negative polarities,
crosstalk occurs, thus resulting in change of the picture
brightness. Thereby, this causes the color of the monochromic
display zone on both sides of the black rectangle to vary. As can
be known by comparison between FIG. 6(a) and FIG. 6(b), with the
pixel array according to embodiments of the invention, the
crosstalk phenomenon can be avoided.
[0059] According to an embodiment of the present disclosure, there
is further provided a display device, comprising a pixel array
according to the above various embodiments. For example, the
display device according to embodiments of the invention is a
liquid crystal display, the color sub-pixels include color filters
in respective colors, sub-pixels in various colors are implemented
by color filters in respective colors. The color filters may be a
structure formed on a color filter substrate, and may also be a
structure formed on an array substrate (COA), there is no specific
limit on this in the liquid crystal display according to
embodiments of the invention. Embodiments according to the
invention do not set a specific limit on the type of the liquid
crystal display, and for example, it may be an advanced
super-dimensional (ADS) liquid crystal display.
[0060] For the liquid crystal display according to embodiments of
the invention, it may further include a drive unit, configured to
conduct a scanning in line sequence on the pixel array. When
sub-pixels in each row of pixels are driven, polarities of image
data signals applied to the sub-pixels vary alternately in
sequence. Thus, not only crosstalk resulted from the fact that
adjacent sub-pixels have the same polarity can be prevented, but
also crosstalk resulted from the fact that adjacent sub-pixels with
the same color have the polarity can be prevented.
[0061] Descriptions made above are merely some concrete embodiments
according to the invention. As for pixel arrays illustrated in FIG.
3 and FIG. 5, each pixel group includes sub-pixels in four colors
of R, G, B and W, and therefore, each pixel group can constitute
one pixel unit for color display. While for the pixel array
illustrated in FIG. 4, a first row and a fourth row in the
two-dimensional repetitive unit each can be divided into pixel
groups including sub-pixels in four colors of R, G, B and W, each
pixel group in the first row may constitute one pixel unit together
with four sub-pixels adjacent to it in a second row for color
display, while each pixel group in the fourth row may constitute
one pixel unit together with four sub-pixels adjacent to it in the
second row for color display. However, the division mode of a pixel
unit according to the invention is not limited to the above various
concrete circumstances.
[0062] In the above descriptions, only FIG. 3 illustrates the
polarity of an image data signal applied to each column, and pixel
arrays illustrated in FIG. 4 and FIG. 5 as well as other pixel
array according to embodiments of the invention have similar drive
modes. Thus, denotation of the polarity for each column is omitted
in FIG. 4 and FIG. 5. In addition, the alternate change starts with
a first column being in a positive polarity in FIG. 3, but
embodiments according to the invention are not limited thereto. It
may also be possible that the alternate change starts with a first
column being in a negative polarity.
[0063] Descriptions made above are merely exemplary embodiments of
the invention, but are not used to limit the protection scope of
the invention. The protection scope of the invention is determined
by attached claims.
[0064] The present disclosure contains subject matter related to
that disclosed in Chinese Priority Patent Application
CN201410409400.8 filed on Aug. 19, 2014, the entire contents of
which are hereby incorporated by reference.
* * * * *