U.S. patent application number 14/344848 was filed with the patent office on 2015-10-01 for method, device and system of touch panel display control.
The applicant listed for this patent is BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.. Invention is credited to Ziwei Cui, Hao Wu, Hongjun Yu.
Application Number | 20150277640 14/344848 |
Document ID | / |
Family ID | 49134886 |
Filed Date | 2015-10-01 |
United States Patent
Application |
20150277640 |
Kind Code |
A1 |
Wu; Hao ; et al. |
October 1, 2015 |
METHOD, DEVICE AND SYSTEM OF TOUCH PANEL DISPLAY CONTROL
Abstract
The embodiments of the present invention disclose a method, a
device and a system of touch panel display control. The method of
touch panel display control comprises: acquiring the changes of the
capacitances at respective positions of coupling capacitors, and
determining pressed pixel units; determining the pressure on the
pressed pixel units according to a first corresponding relationship
between the changes and the pressure; and according to a second
corresponding relationship between the pressure and a current gray
level and a compensation signal, outputting a compensation signal
corresponding to the pressure on the pressed pixel units, and the
compensation signal is used for keeping the consistency of the
light transmittance of the pressed pixel units with that of
non-pressed pixel units. The method of the present invention keeps
a consistent light transmittance between the liquid crystal
molecules of the pressed pixel units and the liquid crystal
molecules of the non-pressed pixel units, so that the image display
of the overall touch panel keeps consistent, and the quality of the
image displayed by the touch panel is improved.
Inventors: |
Wu; Hao; (Beijing, CN)
; Yu; Hongjun; (Beijing, CN) ; Cui; Ziwei;
(Beijing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
BOE TECHNOLOGY GROUP CO., LTD. |
Beijing
Beijing |
|
CN
CN |
|
|
Family ID: |
49134886 |
Appl. No.: |
14/344848 |
Filed: |
December 17, 2013 |
PCT Filed: |
December 17, 2013 |
PCT NO: |
PCT/CN2013/089730 |
371 Date: |
March 13, 2014 |
Current U.S.
Class: |
345/174 |
Current CPC
Class: |
G06F 2203/04105
20130101; G06F 3/0447 20190501; G06F 3/04184 20190501; G06F 3/0412
20130101; G06F 3/044 20130101; G06F 2203/04104 20130101 |
International
Class: |
G06F 3/041 20060101
G06F003/041; G06F 3/044 20060101 G06F003/044 |
Foreign Application Data
Date |
Code |
Application Number |
May 10, 2013 |
CN |
201310173517.6 |
Claims
1. A method of touch panel display control, comprising: acquiring
the amount of changes of the capacitances at respective positions
of coupling capacitors, and determining pressed pixel units;
determining the pressure on the pressed pixel units according to a
first corresponding relationship between the amount of changes of
the capacitances at the positions of the coupling capacitors and
the pressure; and according to a second corresponding relationship
between the pressure on the pressed pixel units and a current gray
level as well as a compensation signal, outputting a compensation
signal corresponding to the pressure on the pressed pixel units,
and the compensation signal being used for keeping the consistency
of the light transmittance of the pressed pixel units with that of
non-pressed pixel units.
2. The method of touch panel display control according to claim 1,
wherein, the first corresponding relationship is the corresponding
relationship, obtained through a plurality of experiments, between
the amount of changes of the capacitances of coupling capacitors
and the pressure on the pressed pixel units.
3. The method of touch panel display control according to claim 1,
wherein, the second corresponding relationship is the relationship
between different pressures and the compensation signals, which is
obtained through searching a compensation signal lookup table
corresponding to pressure information according to the current gray
level and the pressure information.
4. A device of touch panel display control, comprising: an
acquiring unit configured for acquiring the amount of changes of
the capacitances at respective positions of coupling capacitor and
determining pressed pixel units; and a controlling unit configured
for determining the pressure on pressed pixel units according to a
first corresponding relationship between the amount of changes of
the capacitances at the positions of the coupling capacitor and the
pressure; and outputting a compensation signal corresponding to the
pressure on the pressed pixel units according to a second
corresponding relationship between the pressure on the pressed
pixel units and a current gray level as well as the compensation
signal, and the compensation signal being used for keeping the
consistency of the light transmittance of the pressed pixel units
with that of non-pressed pixel units.
5. A system of touch panel display control, comprising: a liquid
crystal panel comprising a plurality of pixel units; coupling
capacitors provided on the liquid crystal panel and configured for
acquiring the amount of changes of the capacitances at positions of
the coupling capacitor and determining pressed pixel units; and a
compensation chip provided on the liquid crystal panel and in
signal connection with the coupling capacitors, which is configured
for determining the pressure on the pressed pixel units according
to a first corresponding relationship between the mount of changes
of the capacitances at the positions of the coupling capacitors and
the pressure; and outputting a compensation signal corresponding to
the pressure on the pressed pixel units according to a second
corresponding relationship between the pressure on the pressed
pixel units and a current gray level and the compensation signal,
and the compensation signal being used for keeping the consistency
of the light transmittance of the pressed pixel units with that of
non-pressed pixel units.
6. The system of touch panel display control according to claim 5,
wherein, the compensation chip comprises: a storage which stores
the first corresponding relationship between the amount of changes
of the capacitances at the positions of the coupling capacitors and
the pressure, and a second corresponding relationship between the
pressure on the pressed pixel units and the current gray level as
well as the compensation signal; and a processor in signal
connection with the storage, which is configured for determining
the pressure on the pressed pixel units according to the first
corresponding relationship between the amount of changes of the
capacitances at the positions of the coupling capacitor and the
pressure; and outputting the compensation signal corresponding to
the pressure on the pressed pixel units according to the second
corresponding relationship between the pressure on the pressed
pixel units and the current gray level as well as the compensation
signal, and the compensation signal being used for keeping the
consistency of the light transmittance of the pressed pixel units
with that of non-pressed pixel units.
Description
TECHNICAL FIELD
[0001] The embodiments of the present invention relate to a method,
a device and a system of touch panel display control.
BACKGROUND
[0002] With the fast development of display technology, touch
panels have been popularized in people's daily life. Currently,
touch panels can be divided into resistive touch panels, capacitive
touch panels, an infrared touch panels and a surface sound wave
type touch panels according to working principles. Wherein, the
capacitive touch panel has been widely used industrially as it can
achieve true multi-point touch and high sensitivity. When the
capacitive touch panel is pressed, the capacitance of a coupling
capacitor provided in the touch panel changes, so that the chip of
a display device can determine the pressed position.
[0003] Current capacitive touch panels are liquid crystal display
screens comprising a color filter substrate and an array substrate
which are assembled, and a liquid crystal layer provided between
the color filter substrate and the array substrate. When the liquid
crystal screen displays an image, the liquid crystal molecules of
the liquid crystal layer are twisted so that light is irradiated to
the color filter substrate through the liquid crystal molecules,
and then the image is displayed.
[0004] The defects of the prior art lie in that, when the touch
panel is pressed, the thickness of the liquid crystal layer is
changed due to the pressure, so that the pressed part and the
non-pressed part of the liquid crystal layer have different light
transmittances, and then the effect of the displayed image is
lowered and then the quality of the image display of the overall
touch panel is affected.
SUMMARY
[0005] The embodiments of the present invention provide a method, a
device and a system of touch panel display control, to improve the
quality of the image display of touch panels.
[0006] The method of touch panel display control provided by the
embodiment of the present invention comprises: acquiring the amount
of changes of the capacitances at respective positions of coupling
capacitors, and determining pressed pixel units;
[0007] determining the pressure on the pressed pixel units
according to a first corresponding relationship between the amount
of changes of the capacitances at the positions of the coupling
capacitor and the pressure; and
[0008] according to a second corresponding relationship between the
pressure on the pressed pixel units and a current gray level as
well as a compensation signal, outputting a compensation signal
corresponding to the pressure on the pressed pixel units, and the
compensation signal is used for keeping the consistency of the
light transmittance of the pressed pixel units with that of
non-pressed pixel units.
[0009] Preferably, the first corresponding relationship is the
corresponding relationship, obtained through a plurality of
experiments, between the amount of changes of the capacitances of
coupling capacitors and the pressure on the pressed pixel
units.
[0010] Preferably, the second corresponding relationship is the
relationship between different pressures and the compensation
signal, which is obtained through searching a compensation signal
lookup table corresponding to pressure information according to the
current gray level and the pressure information.
[0011] The device of touch panel display control provided by the
embodiment of the present invention comprises:
[0012] an acquiring unit configured to acquire the amount of
changes of the capacitances at respective positions of coupling
capacitors and determining pressed pixel units; and
[0013] a controlling unit configured to determine the pressure on
the pressed pixel units according to a first corresponding
relationship between the amount of changes of the capacitances at
the positions of the coupling capacitors and the pressure; and
output a compensation signal corresponding to the pressure on the
pressed pixel units according to a second corresponding
relationship between the pressure on the pressed pixel units and a
current gray level and a compensation signal, and the compensation
signal is used for keeping the consistency of the light
transmittance of the pressed pixel units with that of non-pressed
pixel units.
[0014] The system of touch panel display control provided by the
embodiment of the present invention comprises:
[0015] a liquid crystal panel comprising a plurality of pixel
units;
[0016] coupling capacitors provided on the liquid crystal panel for
acquiring the amount of changes of the capacitances at the
positions of the coupling capacitors on the liquid crystal panel
and determining the pressed pixel units; and
[0017] a compensation chip provided on the liquid crystal panel and
in signal connection with the coupling capacitors, which is used
for determining the pressure on the pressed pixel units according
to a first corresponding relationship between the amounts of
changes of the capacitances at the positions of the coupling
capacitors and the pressure; and outputting a compensation signal
corresponding to the pressure on the pressed pixel units according
to a second corresponding relationship between the pressure on the
pressed pixel units and a current gray level as well as a
compensation signal, and the compensation signal is used for
keeping the consistency of the light transmittance of the pressed
pixel units with that of non-pressed pixel units.
[0018] Preferably, the compensation chip comprises:
[0019] a storage which stores the first corresponding relationship
between the amounts of changes of the capacitances at the positions
of coupling capacitors and the pressure, and the second
corresponding relationship between the pressure on the pressed
pixel units and the current gray level as well as the compensation
signal; and
[0020] a processor in signal connection with the storage, which is
configured for determining the pressure on the pressed pixel units
according to the first corresponding relationship between the
amount of changes of the capacitances at the positions of the
coupling capacitors and the pressure; and outputting a compensation
signal corresponding to the pressure on the pressed pixel units
according to the second corresponding relationship between the
pressure on the pressed pixel units and a current gray level as
well as a compensation signal, and the compensation signal is used
for keeping the consistency of the light transmittance of the
pressed pixel units with that of non-pressed pixel units.
[0021] The method provided by the embodiment of the present
invention first acquires the change information of the capacitances
of the coupling capacitors; then determines the pressure
information of the pressed pixel units according to the change
information of the capacitances of the current coupling capacitors
and the first preset corresponding relationship between the change
information of different capacitances and the pressure information
corresponding to the respective pressed pixel unit; and outputting
a compensation signal corresponding to the pressed pixel units
according to the pressure information and the second preset
corresponding relationship between the different pressure
information and the compensation signal corresponding to the pixel
units. The method provided by the present invention can keep a
consistent light transmittance between the liquid crystal molecules
of the pressed pixel units and the liquid crystal molecules of the
non-pressed pixel units through providing the compensation signal
to the pressed pixel units, and then keep the consistency of the
displayed image of the overall touch panel and improve the quality
of the image displayed by the touch panel.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to clearly illustrate the technical solutions of
the embodiments of the invention, the drawings of the embodiments
will be briefly described in the following; it is obvious that the
described drawings are only related to some embodiments of the
invention and thus are not limitative of the invention.
[0023] FIG. 1 is a flow chart of the method of touch panel display
control in the embodiment of the present invention;
[0024] FIG. 2 is a schematic diagram of the structure of the device
of touch panel display control in the embodiment of the present
invention; and
[0025] FIG. 3 is a schematic diagram of the structure of the system
of touch panel display control in the embodiment of the present
invention.
REFERENCE SIGNS
[0026] 10--liquid crystal panel; 20--coupling capacitor;
30--compensation chip; 31--storage; 32--processor; 40--acquiring
unit; 50--controlling unit
DETAILED DESCRIPTION
[0027] In order to improve the quality of the image display of
touch panels, the embodiments of the present invention provide a
method, a device and a system of touch panel display control. In
the present technical solution, c a consistent light transmittance
between the liquid crystal molecules of the pressed pixel units and
the liquid crystal molecules of the non-pressed pixel units an be
kept through providing the compensation signal to the pressed pixel
units, and then the consistency of the displayed image of the
overall touch panel can be kept and the quality of the image
displayed by the touch panel can be improved. In order to make
objects, technical details and advantages of the embodiments of the
invention apparent, the technical solutions of the embodiment will
be described in a clearly and fully understandable way in
connection with the drawings related to the embodiments of the
invention.
[0028] As shown in FIG. 1, it is a flow chart of the method of
touch panel display control in the embodiments of the present
invention.
[0029] At step 101, the amount of changes of the capacitances at
respective positions of coupling capacitors are acquired, and the
pressed pixel units are determined;
[0030] At step 102, the pressure on the pressed pixel units is
determined according to a first corresponding relationship between
the amount of changes of the capacitances at the positions of
coupling capacitors and the pressure; and
[0031] At step 103, according to a second corresponding
relationship between the pressure on the pressed pixel units and a
current gray level as well as a compensation signal, a compensation
signal corresponding to the pressure on the pressed pixel units is
outputted, and the compensation signal is used for keeping the
consistency of the light transmittance of the pressed pixel units
with that of non-pressed pixel units.
[0032] The method of touch panel display control provided by the
embodiments of the present invention first acquires the amount of
changes of the capacitances at the positions of the coupling
capacitor and then determines the pressed pixel units; then,
determines the pressure on the pressed pixel units according to the
first corresponding relationship between the amount of changes of
the capacitances at the positions the coupling capacitors and the
pressure; and outputs a compensation signal corresponding to the
pressure on the pressed pixel units according to the second
corresponding relationship between the pressure on the pressed
pixels and the current gray level as well as the compensation
signal, and the compensation signal is used to keep the consistency
of the light transmittance of the pressed pixel units with that of
the non-pressed pixel units, and then the consistency of the
displayed image of the overall touch panel is maintained and the
quality of the image displayed by the touch panel is improved.
[0033] Specifically, the pressed pixel units are determined through
acquiring the amount of changes of the capacitances at the
positions of the coupling capacitors, and the pressure information
of the pressed pixel units is determined by the first corresponding
relationship obtained through a plurality of experiments, between
the amounts of changes of the capacitances of the coupling
capacitors and the pressure on the pressed pixel units; then,
according to the pressure on the pressed pixel units and the
current gray level, the compensation signal lookup table
corresponding to the pressure is searched to obtain the
corresponding compensation signal, and the searched compensation
signal is outputted to the pressed pixel units, so that the pressed
pixel units keep consistency with the non-pressed pixel units in
light transmittance, and the display quality of the image of the
touch panel is improved.
[0034] The first corresponding relationship is the relationship
between the amount of changes of the capacitances of coupling
capacitors and the pressure on the pressed pixel units, which is
obtained through a plurality of experiments. When the pixel units
are pressed, the capacitances of the coupling capacitors change
with the pressure, and different pressing forces correspond to
different changes of the capacitances of the coupling capacitors.
Therefore, the relationship between the pressing force and the
amount of changes of the capacitances can be obtained through
experiments, and a corresponding relationship table is established.
During use, the pressure on the pixel units can be determined
through searching the table.
[0035] The second corresponding relationship is different
compensation signal lookup tables established according to
experiments. As shown in table 1, LX gray level is taken as an
example, the transmittance is Tx-0 in the case of no pressing, and
when the pixel units are pressed by a force of N1, the light
transmittances of the gray levels are measured with an optical
measuring instrument, at this moment, LX changes to Tx-1, and the
change amount of the transmittance is recorded as
.DELTA.T.times.1=(Tx-1)-(Tx-0); when the pixel units are pressed by
a force of N2, the light transmittances of the gray levels are
measured with the optical measuring instrument, at this moment, the
change amount of the gray level LX is .DELTA.TX2, in this way,
after the measuring, a matrix corresponding relationship table
between the pressure and the changes of the transmittance is
established.
TABLE-US-00001 TABLE 1 lookup table of transmittance L0 L1 L2 LX .
. . L192 L255 N0 T0-0 T1-0 T2-0 Tx-0 xx T192-0 T255-0 N1 xx xx xx
.DELTA.Tx1 xx xx xx N2 xx xx xx .DELTA.Tx2 xx .DELTA.TxX xx . . .
xx xx xx xx xx xx xx NX xx xx xx .DELTA.TxX xx xx xx
[0036] In table 1, the first row represents the current gray
levels, and the first column represents the pressing forces.
[0037] As shown in table 2, the target gray level corresponding to
the current gray level is measured through the optical measuring
instrument when the transmittance changes. For example, when the
transmittance changes to .DELTA.T.times.X, the target gray level
corresponding to the current gray level L192 is L255, and the
respective gray levels are sequentially measured at different
changes of the transmittance to obtain the corresponding target
gray levels.
TABLE-US-00002 TABLE 2 target gray level lookup table L0 L1 L2 LX .
. . L192 L255 L0 0 xx xx xx xx xx xx L2 xx 0 xx xx xx xx xx Lx xx
xx xx xx xx xx xx . . . xx xx xx xx xx xx xx L255 xx xx xx xx xx
.DELTA.TxX 0
[0038] In table 2, the first row represents the current gray
levels, and the first column represents the target gray levels.
[0039] As shown in table 3, the target gray levels in table 2 are
correspondingly filled into table 1 to obtain the target gray
levels corresponding to the current gray levels under different
pressing forces and then obtain the compensation lookup table.
During use, after obtaining the pressing force, the signals to be
compensated can be obtained through directly searching the
compensation signal lookup table.
TABLE-US-00003 TABLE 3 compensation signal lookup table L0 L1 L2 LX
. . . L192 L255 N0 xx xx xx xx xx xx xx N1 xx xx xx xx xx xx xx N2
xx xx xx xx xx L255 xx . . . xx xx xx xx xx xx xx NX xx xx xx xx xx
xx xx
[0040] In table 3, the first row represents the current gray
levels, and the first column represents the pressing forces.
[0041] As shown in FIG. 2, FIG. 2 is a schematic diagram of the
structure of the device of touch panel display control in the
embodiments of the present invention. The embodiments of the
present invention further provide a device of touch panel display
control, comprising: an acquiring unit 40 for acquiring the amount
of changes of the capacitances at respective positions of coupling
capacitors and determining pressed pixel units; and a controlling
unit 50 for determining the pressure on the pressed pixel units
according to the first corresponding relationship between the
amount of changes of the capacitances at the positions of the
coupling capacitors and the pressure; and outputting a compensation
signal corresponding to the pressure on the pressed pixel units
according to the second corresponding relationship between the
pressure on the pressed pixel units and a current gray level as
well as a compensation signal, and the compensation signal is used
for keeping the consistency of the light transmittance of the
pressed pixel units with that of non-pressed pixel units.
[0042] The device provided by this embodiment can keep a consistent
light transmittance between the liquid crystal molecules of the
pressed pixel units and the liquid crystal molecules of the
non-pressed pixel units, and then improve the quality of the image
displayed by a liquid crystal display device.
[0043] As shown in FIG. 3, it is a schematic diagram of the
structure of the system of touch panel display control in the
embodiments of the present invention. The system of touch panel
display control provided by the embodiment of the present invention
comprises: a liquid crystal panel 10 comprising a plurality of
pixel units; coupling capacitors 20 provided on the liquid crystal
panel 10 for acquiring the amount of changes of the capacitances at
the positions of coupling capacitors on the liquid crystal panel 10
and determining the pressed pixel units; and a compensation chip 30
provided on the liquid crystal panel 10 and in signal connection
with the coupling capacitors 20, which is used for determining the
pressure on the pressed pixel units according to the first
corresponding relationship between the amount of changes of the
capacitances at the positions of the coupling capacitor and the
pressure; and outputting a compensation signal corresponding to the
pressure on the pressed pixel units according to the second
corresponding relationship between the pressure on the pressed
pixel units and a current gray level as well as a compensation
signal, and the compensation signal is used for keeping the
consistency of the light transmittance of the pressed pixel units
with that of non-pressed pixel units.
[0044] Specifically, the coupling capacitors 20 are provided within
the liquid crystal panel 10, when the liquid crystal panel 10 is
pressed, the capacitances of the coupling capacitors 20 change, and
the force on the liquid crystal panel 10 can be obtained through
the changes of the capacitances.
[0045] The compensation ship 30 comprises a storage 31 and a
processor 32.
[0046] The storage 31 stores the first corresponding relationship
between the amount of changes of the capacitances at the positions
of the coupling capacitors and the pressure, and the second
corresponding relationship between the pressure on the pressed
pixel units and the current gray level as well as the compensation
signal.
[0047] The processor 32 is in signal connection with the storage,
and used for determining the pressure on the pressed pixel units
according to the first corresponding relationship between the
amount of changes of the capacitances at the positions of the
coupling capacitor and the pressure; and outputting a compensation
signal corresponding to the pressure on the pressed pixel units
according to the second corresponding relationship between the
pressure on the pressed pixel units and a current gray level as
well as a compensation signal, and the compensation signal is used
for keeping the consistency of the light transmittance of the
pressed pixel units with that of non-pressed pixel units.
[0048] To sum up, in the embodiments of the present invention, the
pressure information of the pressed pixel units is obtained through
acquiring the capacitance changes of the coupling capacitors under
the pressure according to the information of the capacitance
changes of the coupling capacitors and the first corresponding
relationship; then the compensation signal corresponding to the
pressed pixel units is outputted according to the pressure
information and the second preset corresponding relationship, so
that the liquid crystal molecules of the pressed pixel units keep
consistent with the liquid crystal molecules of the non-pressed
pixel units in light transmittance, and the quality of the image
displayed by the touch panel is thereby improved.
[0049] The embodiments of the invention are thus described, and it
will be obvious that the same may be varied in many ways. Such
variations are not to be regarded as a departure from the spirit
and scope of the invention, and all such modifications as would be
obvious to one skilled in the art are intended to be included
within the scope of the following claims.
* * * * *