U.S. patent application number 14/459793 was filed with the patent office on 2014-12-04 for touch-sensing display device.
The applicant listed for this patent is Wintek Corporation. Invention is credited to TING-YU CHANG, CHIH-CHANG LAI, CHIN-CHANG LIU, WEN-CHUN WANG.
Application Number | 20140354575 14/459793 |
Document ID | / |
Family ID | 44258169 |
Filed Date | 2014-12-04 |
United States Patent
Application |
20140354575 |
Kind Code |
A1 |
WANG; WEN-CHUN ; et
al. |
December 4, 2014 |
TOUCH-SENSING DISPLAY DEVICE
Abstract
A touch-sensing display device includes a display panel, a touch
panel, a driver unit, and a flexible printed circuit board. The
touch panel is disposed on the display panel, and the driver unit
is disposed on the display panel to provide driving signals and
drive the display panel and the touch panel. The flexible printed
circuit board connects the display panel to a system main
board.
Inventors: |
WANG; WEN-CHUN; (TAICHUNG
CITY, TW) ; LAI; CHIH-CHANG; (TAI PING CITY, TW)
; CHANG; TING-YU; (FENG SHAN CITY, TW) ; LIU;
CHIN-CHANG; (FENGYUAN CITY, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Wintek Corporation |
Taichung City |
|
TW |
|
|
Family ID: |
44258169 |
Appl. No.: |
14/459793 |
Filed: |
August 14, 2014 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
13006121 |
Jan 13, 2011 |
8836650 |
|
|
14459793 |
|
|
|
|
Current U.S.
Class: |
345/173 |
Current CPC
Class: |
G02F 1/13338 20130101;
G06F 2203/04107 20130101; G06F 3/041 20130101; G06F 2203/04103
20130101; G06F 3/04164 20190501 |
Class at
Publication: |
345/173 |
International
Class: |
G06F 3/041 20060101
G06F003/041 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 14, 2010 |
TW |
099100866 |
Apr 2, 2010 |
TW |
099110273 |
Claims
1. A touch-sensing display device, comprising: a display panel; a
cover glass disposed on one side of the display panel; a
touch-sensing element formed on the cover glass; a driver IC
disposed on the display panel and providing driving signals to
drive the display panel and the touch-sensing element, wherein the
driver IC comprises at least one first pad block associated with a
touch-sensing function and at least one second pad block associated
with a display function, the first pad block has multiple first
pads arranged to form a first pattern, the second pad block has
multiple second pads arranged to form a second pattern, and the
first pattern is different to the second pattern; a first flexible
printed circuit board for connecting the display panel to a system
main board; and a second flexible printed circuit board for
connecting the touch-sensing element o the first flexible printed
circuit board.
2. The touch-sensing display device as claimed in claim 1, wherein
the display panel is connected to the system main board through a
first connector, the touch-sensing element comprises a first outer
lead, the display panel comprises a second outer lead, signal lines
of the touch-sensing element are connected to the first flexible
printed circuit board through the first outer lead, the second
flexible printed circuit board and a second connector, and the
routing of the first flexible printed circuit board is connected to
the driver IC through the second outer lead.
3. The touch-sensing display device as claimed in claim 1, wherein
an arrangement of the first pads in the first pad block is
different to an arrangement of the second pads in the second pad
block.
4. The touch-sensing display device as claimed in claim 1, wherein
a pitch between two adjacent first pads in the first pad block is
different to a pitch between two adjacent second pads in the second
pad block.
5. The touch-sensing display device as claimed in claim 1, wherein
the driver IC comprises a source channel, a gate channel and a
touch panel controller.
6. The touch-sensing display device as claimed in claim 5, wherein
the first pad block is a source pad block, the first pads are
source pads, the second pad block is a touch pad block, the second
pads are touch pads, and an arrangement of the source pads in the
source pad block is different to an arrangement of the touch pads
in the touch pad block.
7. The touch-sensing display device as claimed in claim 5, wherein
the first pad block is a source pad block, the first pads are
source pads, the second pad block is a touch pad block, the second
pads are touch pads, and a pitch between two adjacent source pads
in the source pad block is different to a pitch between two
adjacent touch pads in the touch pad block.
8. The touch-sensing display device as claimed in claim 1, wherein
the touch-sensing element is a touch panel, and the cover glass
covers the touch panel.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application is a Continuation of co-pending application
Ser. No. 13/006,121, filed on Jan. 13, 2011, for which priority is
claimed under 35 U.S.C. .sctn.120; this application claims
priorities of Application No. 099100866 filed in Taiwan on Jan. 14,
2010 and Application No. 099110273 filed in Taiwan on Apr. 2, 2010
under 35 U.S.C. .sctn.119; and the entire contents of all of which
are hereby incorporated by reference.
BACKGROUND OF THE INVENTION
[0002] a. Field of the Invention
[0003] The invention relates to a touch-sensing display device.
[0004] b. Description of the Related Art
[0005] FIG. 1 shows a schematic diagram of a conventional
touch-sensing display device 100. As shown in FIG. 1, an external
touch panel 104 is attached to a display panel 102, and a display
panel driver IC (LCD driver) of the touch-sensing display device
100 and a touch panel driver IC (touch panel controller) are
separated from each other. Thus, two flexible printed circuit
boards (FPC) are needed, where a first flexible printed circuit
board 106 connects the signals between the LCD driver and the
system main board 110 and a second flexible printed circuit board
108 connects the routing of the touch panel 104 and the touch panel
controller and further connects them to the first flexible printed
circuit board 106. FIG. 2 shows another conventional touch-sensing
display device 200. As shown in FIG. 2, an embedded touch panel 204
is directly integrated into a display panel 202, and the display
panel driver IC (LCD driver) and the touch panel driver IC (touch
panel controller) are separated from each other. Thus, similarly,
two flexible printed circuit boards (FPC) are needed, where a first
flexible printed circuit board 206 connects the signals between the
LCD driver and the system main board 210 and a second flexible
printed circuit board 208 connects the routing of the touch panel
204 and the signal lines of the system main board 210.
[0006] Therefore, according to the conventional designs, two
flexible printed circuit boards are needed to combine with a
display panel driver IC and a touch panel driver IC separate from
each to therefore decrease the production yield and increase
fabrication costs. Thus, the routing design of a single driver IC
that has the function of driving both a display panel and a touch
panel is needed to reduce signal noises and layout areas.
BRIEF SUMMARY OF THE INVENTION
[0007] The invention provides a touch-sensing display device having
reduced signal noises and layout areas.
[0008] According to an embodiment of the invention, a touch-sensing
display device includes a display panel, a touch panel, a driver
unit, and a flexible printed circuit board. The touch panel is
disposed on the display panel, and the driver unit is disposed on
the display panel to provide driving signals and drive the display
panel and the touch panel. The flexible printed circuit board
connects the display panel to a system main board.
[0009] According to another embodiment of the invention, a
touch-sensing display device includes a display panel, a touch
panel, a driver unit, a first flexible printed circuit board and a
second flexible printed circuit board. The driver unit is disposed
on the display panel and provides driving signals to drive the
display panel and the touch panel. The first flexible printed
circuit board is electrically connected to the driver unit and
connects the display panel to a system main board through a first
connector. The second flexible printed circuit board connects the
touch panel to the first flexible printed circuit board.
[0010] According another embodiment of the invention, a
touch-sensing display device includes a display panel, a cover
glass, a touch panel, a driver unit, a first flexible printed
circuit board and a second flexible printed circuit board. The
cover glass is disposed on one side of the display panel, and the
touch panel is formed on the cover glass. The driver unit is
disposed on the display panel and provides driving signals to drive
the display panel and the touch panel. The first flexible printed
circuit board connects the display panel to a system main board
through a connector, and the second flexible printed circuit board
connects the touch panel to the display panel.
[0011] In one embodiment, the driver unit includes at least one
first pad block with a first function and at least one second pad
block with a second function, the second function is different to
the first function, and the pad distribution or the pad arrangement
of the first pad. block is different to the pad distribution or the
pad arrangement of the second pad block.
[0012] In one embodiment, the driver unit includes at least one
first pad block with a first function and at least one second pad
block with a second function, the second function is different to
the first function, the first pad block comprises a plurality of
first pads, the second pad block comprises a plurality of second
pads, a pitch between two adjacent first pads is different to the
distance between the first pad block and the second pad block, and
a pitch between two adjacent second pads is different to the
distance between the first pad block and the second pad block.
[0013] In one embodiment, the driver unit includes at least one
first pad block with a first function and at least one second pad
block with a second function, the second function is different to
the first function, the first pad block comprises a plurality of
first pads, the second pad block comprises a plurality of second
pads, and a pitch between two adjacent first pads, a pitch between
two adjacent second pads and the distance between the first pad
block and the second pad block are different from each other.
[0014] Other objectives, features and advantages of the invention
will be further understood from the further technological features
disclosed by the embodiments of the invention wherein there are
shown and described preferred embodiments of this invention, simply
by way of illustration of modes best suited to carry out the
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] FIG. 1 shows a schematic diagram of a conventional
touch-sensing display device according to the prior art.
[0016] FIG. 2 shows a schematic diagram of another conventional
touch-sensing display device according to the prior art.
[0017] FIG. 3A shows a schematic diagram illustrating a
touch-sensing display device according to an embodiment of the
invention and FIG. 3B shows a partial cross-sectional schematic
diagram of FIG. 3A.
[0018] FIG. 4A shows a schematic diagram illustrating a
touch-sensing display device according to another embodiment of the
invention and FIG. 4B shows a partial cross-sectional schematic
diagram of FIG. 4A.
[0019] FIG. 5A shows a schematic diagram illustrating a
touch-sensing display device according to another embodiment of the
invention and FIG. 5B shows a partial cross-sectional schematic
diagram of FIG. 5A.
[0020] FIG. 6A shows a schematic diagram illustrating a
touch-sensing display device according to another embodiment of the
invention and FIG. 6B shows a partial cross-sectional schematic
diagram of FIG. 6A.
[0021] FIGS. 7-10 show distribution schematic diagrams of different
pad blocks with different functions according to different
embodiments of the invention.
DETAILED DESCRIPTION OF THE INVENTION
[0022] In the following detailed description of the preferred
embodiments, reference is made to the accompanying drawings which
form a part hereof, and in which are shown by way of illustration
specific embodiments in which the invention may be practiced. In
this regard, directional terminology, such as "top," "bottom,"
"front," "back," etc., is used with reference to the orientation of
the Figure(s) being described. The components of the invention can
be positioned in a number of different orientations. As such, the
directional terminology is used for purposes of illustration and is
in no way limiting. On the other hand, the drawings are only
schematic and the sizes of components may be exaggerated for
clarity. It is to be understood that other embodiments may be
utilized and structural changes may be made without departing from
the scope of the invention. Also, it is to be understood that the
phraseology and terminology used herein are for the purpose of
description and should not be regarded as limiting. The use of
"including," "comprising," or "having" and variations thereof
herein is meant to encompass the items listed thereafter and
equivalents thereof as well as additional items. Unless limited
otherwise, the terms "connected," "coupled," and "mounted" and
variations thereof herein are used broadly and encompass direct and
indirect connections, couplings, and mountings. Similarly, the
terms "facing," "faces" and variations thereof herein are used
broadly and encompass direct and indirect facing, and "adjacent to"
and variations thereof herein are used broadly and encompass
directly and indirectly "adjacent to". Therefore, the description
of "A" component facing "B" component herein may contain the
situations that "A" component directly faces "B" component or one
or more additional components are between "A" component and "B"
component. Also, the description of "A" component "adjacent to" "B"
component herein may contain the situations that "A" component is
directly "adjacent to" "B" component or one or more additional
components are between "A" component and "B" component.
Accordingly, the drawings and descriptions will be regarded as
illustrative in nature and not as restrictive.
[0023] FIG. 3A shows a touch-sensing display device 10 according to
an embodiment of the invention, and FIG. 39 shows a partial
cross-sectional schematic diagram of FIG. 3A. As shown in FIG. 3A,
the touch-sensing display device 10 includes a display panel 12, a
touch panel 14, a driver unit 16, and a flexible printed circuit
board (FPC) 18. The touch panel 14 is disposed on the display panel
12, and the driver unit 16 is disposed on the display panel 12 to
provide driving signals for driving the display panel 12 and the
touch panel 14. The flexible printed circuit board 18 connects the
display panel 12 to a system main board 24. Specifically, the
flexible printed circuit board 18 may connect the display panel 12
to a connector 22, and the connector 22 is connected to a system
main board 24. In this embodiment, the gate driver (RASD circuit 26
shown in FIG. 3A) of the display panel 12 is embedded in a bottom
glass 12a of the display panel 12, and the driver unit 16 is, for
example, a single driver IC with a touch-sensing function. The
driver unit 16 provides driving signals to drive the display panel
12 and the touch panel 14 and includes a source channel 32, a touch
panel (TP) controller 34, and control lines of the gate driver. As
shown in FIG. 3B, the touch panel 14 is embedded in the display
panel 12, and signal lines of the touch panel 14 are connected to a
pad 38 on the bottom glass 12a of the display panel 12 through an
outer lead 28 and silver paste 36. The pad 38 is interconnected
with the driver unit 16, and a cover glass 42 covers the touch
panel 14.
[0024] In this embodiment, signal lines of the touch panel 14 are
directly connected to the driver unit 16 having a touch-sensing
function on the bottom glass 12a of the display panel 12.
Therefore, only one flexible printed circuit board, one connector,
and one IC are needed to thereby increase the production yield and
reduce fabrication costs, signal noises and layout areas.
[0025] FIG. 4A shows a schematic diagram illustrating a
touch-sensing display device 20 according to another embodiment of
the invention. FIG. 4B shows a partial cross-sectional schematic
diagram of FIG. 4A. As shown in FIGS. 4A and 4B, the touch-sensing
display device 20 includes a display panel 12, a touch panel 14, a
driver unit 16, a first flexible printed circuit board 18a and a
second flexible printed circuit board 18b. The driver unit 16 is
disposed on the display panel 12 and provides driving signals to
drive the display panel 12 and the touch panel 14. The first
flexible printed circuit board 18a is electrically connected to the
driver unit 16 and connects the display panel 12 to a first
connector 22a, and the first connector 22a is connected to a system
main board 24. Signal lines X1-Xm and Y1-Yn of the touch panel 14
are connected to the first flexible printed circuit board 18a
through the first outer lead 28a of the touch panel 14, the second
flexible printed circuit board 18b and the second connector 22b,
and the routing of the first flexible printed circuit board 18a is
connected to the driver unit 16 through the second outer lead 28b
of the display panel 12. Besides, a cover glass 42 covers the touch
panel 14, and the touch panel 14 may be formed on a glass carrier
48. In this embodiment, the driver unit 16 is, for example, a
single driver IC with a touch-sensing function. The driver unit 16
provides driving signals for driving the display panel 12 and the
touch panel 14 and includes a source channel 32, a gate channel 44
and a touch panel controller 34. The gate channel 44 may be divided
into two parts, a left part of the gate channel 44 may drive
odd-numbered gate lines, and a right part of the gate channel 44
may drive even-numbered gate lines.
[0026] FIG. 5A shows a schematic diagram illustrating a
touch-sensing display device 30 according to another embodiment of
the invention, and FIG. 5B shows a partial cross-sectional
schematic diagram of FIG. 5A. As shown in FIGS. 5A and 5B, the
touch-sensing display device 30 includes a display panel 12, a
touch panel 14, a driver unit 16, a first flexible printed circuit
board 18a and a second flexible printed circuit board 18b. A cover
glass 42 is disposed on one side of the display panel 12, and the
touch panel 14 is formed on the cover glass 42. The driver unit 16
is disposed on the display panel 12 and provides driving signals to
drive the display panel 12 and the touch panel 14. The first
flexible printed circuit board 18a connects the display panel 12 to
a connector 22, and the connector 22 is connected to a system main
board 24. Signal lines of the touch panel 14 are connected to a
second outer lead 28b of the display panel 12 through a first outer
lead 28a of the touch panel 14 and the second flexible printed
circuit board 18b, and the second outer lead 28b is connected to a
touch panel controller 34 of the driver unit 16. In this
embodiment, the driver unit 16 is, for example, a single driver IC
with a touch-sensing function. The driver unit 16 includes a source
channel 32, a gate channel 44 and a touch panel controller 34 to
provide driving signals for driving the display panel 12 and the
touch panel 14. The gate channel 44 may be divided into two parts,
a left part of the gate channel 44 may drive odd-numbered gate
lines, and a right part of the gate channel 44 may drive
even-numbered gate lines.
[0027] The touch-sensing display device 40 shown in FIGS. 6A and 6B
is similar to the touch-sensing display device 30 shown in FIGS. 5A
and 5B, except the driver unit 16 of the touch-sensing display
device 40 includes a first touch panel controller 34a and a second
touch panel controller 34b. A half of signal lines of the touch
panel 14 are connected to the second outer lead 28b of the display
panel 12 through the first outer lead 28a of the touch panel 14 and
the second flexible printed circuit board 18b, and the second outer
lead 28b is connected to the first touch panel controller 34a of
the driver unit 16. The other half of signal lines of the touch
panel 14 are connected to the fourth outer lead 28d of the display
panel 12 through the third outer lead 28c of the touch panel 14 and
the third flexible printed circuit board 18c, and the fourth outer
lead 28d is connected to the second touch panel controller 34b of
the driver unit 16.
[0028] Furthermore, in the above embodiments, the wiring
configurations of the touch panel 14 and the display panel 12 can
be exchanged with each other to also achieve the same effect of
reducing noises and layout areas.
[0029] Besides, since the driver unit 16 has both the effects of
driving a display panel and performing touch-sensing controls, the
following will describe how to differentiate the functionalities of
a source pad block SP, a gate pad block GP, a touch pad block TP,
and a driver control signal pad block DP in the driver unit 16.
[0030] As shown in FIG. 7, the source pad block SP and the gate pad
block GP are disposed on a longitudinal side of the driver unit 16
and the touch pad blocks TP are disposed on two lateral sides (on
the left-hand side and the right-hand side of the longitudinal
side) of the driver unit 16. The pads in the touch pad blocks TP,
the source pad block SP and the gate pad block GP may be arranged
into a row. Therefore, the functionalities of the source pad block
SP, the gate pad block GP and the touch pad blocks TP can be
distinguished by the distribution positions on the driver unit
16.
[0031] As shown in FIG. 8, the source pad block SP and the gate pad
block GP are disposed on a longitudinal side of the driver unit 16,
and the touch pad blocks TP are disposed towards the right-hand
side or the left-hand side of the longitudinal side of the driver
unit 16. The pads in the touch pad blocks TP, the source pad block
SP and the gate pad block GP are arranged into two rows. In this
embodiment, when a pitch between two adjacent pads in the touch pad
block TP is G1, a pitch between two adjacent pads in the source pad
block SP (or gate pad block GP) is G3, the distance between the
touch pad blocks TP and the source pad block SP (gate pad block GP)
is G2, it is designed to have G1.noteq.G2 and G3.noteq.G2 or
designed to have G1.noteq.G2.noteq.G3. Therefore, the
functionalities of blocks can be distinguished by the pitch of pads
and the distance between blocks.
[0032] As shown in FIG. 9, the source pad block SP (or gate pad
block GP) is disposed on a longitudinal side of the driver unit 16
and the touch pad blocks TP are disposed towards the right-hand
side or the left-hand side of the longitudinal side of the driver
unit 16. The pads in the touch pad blocks TP are arranged into one
row, and the pads in the source pad block SP (or gate pad block GP)
are arranged into two rows. Therefore, the functionalities of
blocks can be distinguished by different arrangement of pads.
[0033] As shown in FIG. 10, the driver control signal pad block DP
is disposed on a longitudinal side of the driver unit 16, and the
touch pad blocks TP are disposed towards the left-hand side or the
right-hand side of the longitudinal side of the driver unit 16. The
pads in the touch pad blocks TP, the driver control signal pad
block DP, the source pad block SP and the gate pad block GP are all
arranged into two rows. In this embodiment, when a pitch between
two adjacent pads in the touch pad block TP is G1, a pitch between
two adjacent pads in the driver control signal pad block DP is G3,
the distance between the driver control signal pad block DP and the
touch pad blocks TP is G2, it is designed to have G1.noteq.G2 and
G3.noteq.G2 or designed to have G1.noteq.G2.noteq.G3. Therefore,
the functionalities of blocks can be distinguished by the pitch of
pads and the distance between blocks.
[0034] In the above embodiments, the arrangement and the positions
of pads in the pad block can be altered. Besides, the touch panel
14 in the above embodiments is only shown as an example but not
limits the invention. Any touch-sensing element capable of
performing touch-sensing controls can be applied to each embodiment
of the invention. The foregoing description of the preferred
embodiments of the invention has been presented for purposes of
illustration and description. It is not intended to be exhaustive
or to limit the invention to the precise form or to exemplary
embodiments disclosed. Accordingly, the foregoing description
should be regarded as illustrative rather than restrictive.
Obviously, many modifications and variations will be apparent to
practitioners skilled in this art. The embodiments are chosen and
described in order to best explain the principles of the invention
and its best mode practical application, thereby to enable persons
skilled in the art to understand the invention for various
embodiments and with various modifications as are suited to the
particular use or implementation contemplated. It is intended that
the scope of the invention be defined by the claims appended hereto
and their equivalents in which all terms are meant in their
broadest reasonable sense unless otherwise indicated. Therefore,
the term "the invention", "the present invention" or the like does
not necessarily limit the claim scope to a specific embodiment, and
the reference to particularly preferred exemplary embodiments of
the invention does not imply a limitation on the invention, and no
such limitation is to be inferred. The invention is limited only by
the spirit and scope of the appended claims. The abstract of the
disclosure is provided to comply with the rules requiring an
abstract, which will allow a searcher to quickly ascertain the
subject matter of the technical disclosure of any patent issued
from this disclosure. It is submitted with the understanding that
it will not be used to interpret or limit the scope or meaning of
the claims. Any advantages and benefits described may not apply to
all embodiments of the invention. It should be appreciated that
variations may be made in the embodiments described by persons
skilled in the art without departing from the scope of the
invention as defined by the following claims. Moreover, no element
and component in the present disclosure is intended to be dedicated
to the public regardless of whether the element or component is
explicitly recited in the following claims.
* * * * *