CN111862896A - Common voltage compensation device and method applied to display driving circuit - Google Patents
Common voltage compensation device and method applied to display driving circuit Download PDFInfo
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- CN111862896A CN111862896A CN201910437699.0A CN201910437699A CN111862896A CN 111862896 A CN111862896 A CN 111862896A CN 201910437699 A CN201910437699 A CN 201910437699A CN 111862896 A CN111862896 A CN 111862896A
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- 238000006243 chemical reaction Methods 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
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- Theoretical Computer Science (AREA)
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Abstract
The invention discloses a common voltage compensation device and a common voltage compensation method applied to a display driving circuit. The display driving circuit comprises a receiving unit and a latch unit. The receiving unit receives a plurality of input data and transmits the plurality of input data to the latch unit. The common voltage compensation device comprises a judgment unit and a compensation unit. The judging unit is coupled between the receiving unit and the latching unit and used for judging whether the coupled common voltage needs to be compensated or not according to the plurality of input data. The compensation unit is coupled to the judgment unit and used for selectively compensating the coupled common voltage according to the judgment result of the judgment unit so as to generate a compensated common voltage.
Description
Technical Field
The present invention relates to a display, and more particularly, to a common voltage compensation device and a common voltage compensation method applied to a display driving circuit.
Background
Please refer to fig. 1 to 5. Fig. 1 is a schematic diagram of a conventional liquid crystal display panel architecture (LCD panel architecture). Fig. 2 to 3 show that the Coupling (Coupling) of the Common Voltage (VCOM) is directly influenced by the output voltage of the source driver. Fig. 4A to 4C are an embodiment of an ideal display pattern, a display pattern with horizontal Crosstalk (Crosstalk), and different Data line positions of the display panel, respectively. FIG. 5 is a timing diagram illustrating the common voltage being distorted by different data lines and failing to return to the desired voltage level before the gate is turned off (as shown by the circled points A3 and A4).
In general, in order to reduce the common voltage coupling phenomenon on the liquid crystal display panel side, a circuit designer may add a logic operation mechanism to the common voltage buffer circuit of the display driving circuit. However, since the area of the display driving circuit is limited, once more logic control circuits and common voltage buffer control circuits are added to the display driving circuit, the area of the display driving circuit is wasted.
In addition, panel designers can reduce the noise of the common voltage by reducing the pixel capacitance of the lcd array, or resist the coupling of the display data by enhancing the driving capability of the common voltage. However, as the size of the display panel is getting larger and larger, the complexity of the display panel design is also increased, so that the conventional methods of reducing the pixel capacitance and enhancing the driving capability of the common voltage are greatly limited, and thus, a need to overcome the above problem is needed.
Disclosure of Invention
In view of the above, the present invention provides a common voltage compensation apparatus and a common voltage compensation method applied to a display driving circuit to effectively solve the above-mentioned problems encountered in the prior art.
An embodiment of the present invention is a common voltage compensation device. In this embodiment, the common voltage compensation device is applied to the display driving circuit. The display driving circuit comprises a receiving unit and a latch unit. The receiving unit receives a plurality of input data and transmits the plurality of input data to the latch unit. The common voltage compensation device comprises a judgment unit and a compensation unit. The judging unit is coupled between the receiving unit and the latching unit and used for judging whether the coupled common voltage needs to be compensated or not according to the plurality of input data. The compensation unit is coupled to the judgment unit and used for selectively compensating the coupled common voltage according to the judgment result of the judgment unit so as to generate a compensated common voltage.
In an embodiment, if the determination result of the determining unit is yes, the compensating unit compensates the coupled common voltage line to generate a compensated common voltage; if the judgment result of the judgment unit is negative, the compensation unit does not compensate the coupled common voltage.
In an embodiment, the common voltage compensation device further includes a buffer unit. The buffer unit has a first input terminal, a second input terminal and an output terminal. The first input end is coupled with the compensation unit, the second input end is coupled with the output end, and the compensated common voltage is output by the output end.
In one embodiment, the display driving circuit further includes an output pad. The output pad is coupled between the display panel and the output end of the buffer unit and used for outputting the compensated common voltage to the display panel.
In one embodiment, when the compensation unit compensates the coupled common voltage, the compensation unit generates a Pre-charging/Pre-discharging voltage (Pre-charging/Pre-discharging voltage) according to the plurality of input data and superimposes the Pre-charging/Pre-discharging voltage on the coupled common voltage to generate the compensated common voltage.
In one embodiment, the pre-charge/pre-discharge voltage and the coupled common voltage are inverted with respect to each other, and the pre-charge/pre-discharge voltage temporally precedes the coupled common voltage.
In one embodiment, the display driving circuit is a source driver integrated circuit.
Another embodiment according to the present invention is a common voltage compensation method. In this embodiment, the common voltage compensation method is applied to the display driving circuit. The common voltage compensation method comprises the following steps:
(a) the display driving circuit receives a plurality of input data;
(b) judging whether the coupled common voltage needs to be compensated or not according to the plurality of input data; and
(c) selectively compensating the coupled common voltage according to the judgment result of the step (b) to generate a compensated common voltage.
In one embodiment, if the determination result in the step (b) is yes, the step (c) compensates the coupled common voltage to generate the compensated common voltage; if the judgment result in the step (b) is negative, the step (c) does not compensate the coupled common voltage.
In one embodiment, the display driving circuit is coupled to a display panel, and the common voltage compensation method further includes the following steps: (d) and outputting the compensated common voltage to the display panel.
In one embodiment, when the step (c) compensates the coupled common voltage, the step (c) generates a pre-charge/pre-discharge voltage according to the plurality of input data and superimposes the pre-charge/pre-discharge voltage on the coupled common voltage to generate the compensated common voltage.
In one embodiment, the pre-charge/pre-discharge voltage and the coupled common voltage are inverted with respect to each other, and the pre-charge/pre-discharge voltage temporally precedes the coupled common voltage.
In one embodiment, the display driving circuit is a source driver integrated circuit.
Compared with the prior art, the common voltage compensation device and the common voltage compensation method of the invention judge whether a pre-charge/pre-discharge voltage signal which is opposite to the coupled common voltage and leads in time needs to be generated or not according to a plurality of input data received by a display driving circuit (a source drive integrated circuit) so as to compensate the coupled common voltage, thereby reducing the noise of the coupled common voltage. Therefore, a panel designer does not need to reduce the noise of the common voltage by reducing the pixel capacitance of the liquid crystal display array and does not need to resist the coupling of display data by enhancing the driving capability of the common voltage, so that the complexity of the design of the display panel can be greatly reduced.
In addition, the compensation of the coupled common voltage by the common voltage compensation Device and the common voltage compensation method of the present invention can be adjusted according to different display data, different Bias setting (Bias setting) and different Device size control (Device size control) of the display panel, so that the flexibility in performing the common voltage compensation can be greatly increased.
The advantages and spirit of the present invention can be further understood by the following detailed description of the invention and the accompanying drawings.
Drawings
The attached drawings of the invention are illustrated as follows:
fig. 1 is a schematic diagram of a conventional lcd panel structure.
Fig. 2 to 3 show that the coupling of the common voltage is directly affected by the output voltage of the source driver.
Fig. 4A to 4C are schematic diagrams illustrating an ideal display pattern, a display pattern with horizontal crosstalk, and different data line positions, respectively.
FIG. 5 is a timing diagram illustrating the common voltage being distorted by different data lines and failing to return to the desired voltage level before the gate is turned off.
FIG. 6 is a diagram of a common voltage compensation device applied to a display driving circuit according to a preferred embodiment of the present invention.
Fig. 7 is a timing diagram of the common voltage compensation apparatus of the present invention for generating a compensated common voltage by superimposing the pre-charge/pre-discharge voltage on the coupled common voltage.
FIG. 8 is a flowchart of a common voltage compensation method according to another preferred embodiment of the present invention.
Description of the main element symbols:
S10-S14: step (ii) of
1: display device
PL: display panel
PCB: circuit board
TCON: time sequence controller
PW: power supply
VCOM: coupled common voltage
SD, SD 1-SDN: source electrode driving integrated circuit
GD. GD 1-GDN: gate drive integrated circuit
DAT: displaying data
BF 1-BF 2: buffer unit
SW 1-SW 2: switch unit
CH 1-CH 2: channel
CON: control unit
VOUT (SD1) to VOUT (SD 2): output voltage of source driving integrated circuit
t 1-t 4: time of day
GPX: gray pixel
BPX: black pixel
HCT: horizontal crosstalk
DLA to DLB: display line
GX to GY: gate line
PXB 1-PXB 2: pixel
RX: receiving unit
LA: latch unit
LS: level shift unit
DAC: digital-to-analog conversion unit
BF 1-BFN: buffer unit
CH 1-CHN: channel
C: capacitor with a capacitor element
R: resistance (RC)
6: common voltage compensation device
60: judging unit
62: compensation unit
64: buffer unit
DAT 1-DATN: inputting data
JR: the judgment result
VCOM': compensated common voltage
PAD: output pad
A1-A4: circled part
1 FM: one frame
STB: converting signals
PC: pre-charge/pre-discharge voltage
DR: during the display period
VIC: ideal voltage value
Detailed Description
An embodiment of the present invention is a common voltage compensation device. In this embodiment, the common voltage compensation device is applied to a display driving circuit, such as a source driver integrated circuit, but not limited thereto.
Referring to fig. 6, fig. 6 is a schematic diagram illustrating the application of the common voltage compensation device in the embodiment to the display driving circuit.
As shown in fig. 6, the display driving circuit SD is coupled to the display panel PL. The display driving circuit SD includes a receiving unit RX, a latch unit LA, a level shift unit LS, a digital-analog conversion unit DAC, and N buffer units BF1 to BFN corresponding to N channels CH1 to CHN, respectively, where N is a positive integer.
The receiving unit RX is coupled to the latch unit LA. The latch unit LA is coupled to the level shift unit LS. The level shift unit LS is coupled to the digital-to-analog conversion unit DAC. The DAC is coupled to the positive inputs + of the N buffer units BF 1-BFN. The negative inputs and outputs of the N buffer units BF1 to BFN are coupled to each other.
When the receiving unit RX receives the N input data DAT1 to DATN respectively corresponding to the N channels CH1 to CHN, the receiving unit RX transfers the N input data DAT1 to DATN to the latch unit LA. Next, the level shift unit LS performs a level shift process on the N input data DAT1 to DATN, the digital-analog conversion unit DAC performs a process of converting digital signals into analog signals, and the N buffer units BF1 to BFN output the analog signals to the display panel PL through the N channels CH1 to CHN, respectively.
In this embodiment, the common voltage compensation device 6 includes a determining unit 60, a compensating unit 62 and a buffering unit 64. The buffer unit 64 has a positive input terminal +, a negative input terminal-, and an output terminal K. The determining unit 60 is coupled between the receiving unit RX and the latch unit LA. The determining unit 60 is further coupled to the compensating unit 62. The compensation unit 62 is coupled to the positive input of the buffer unit 64 +. The negative input and the output K of the buffer unit 64 are coupled to each other. The output terminal K of the buffer unit 64 is coupled to the display panel PL through the output PAD.
The determining unit 60 is configured to determine whether compensation for the coupled common voltage VCOM is required according to the N input data DAT 1-DATN and provide the determining result JR to the compensating unit 62. The compensation unit 62 selectively compensates the coupled common voltage VCOM according to the determination result JR of the determining unit 60 to generate the compensated common voltage VCOM 'to the positive input terminal + of the buffer unit 64, and then the compensated common voltage VCOM' is outputted from the output terminal K of the buffer unit 64 to the display panel PL through the output PAD.
In detail, if the determination result JR of the determining unit 60 is yes, that is, the coupled common voltage VCOM needs to be voltage compensated, the compensating unit 62 performs voltage compensation on the coupled common voltage VCOM to generate a compensated common voltage VCOM'; if the determination result JR of the determining unit 60 is negative, that is, the coupled common voltage VCOM does not need to be voltage compensated, step S14 does not perform voltage compensation on the coupled common voltage VCOM.
In practical applications, when the compensation unit 62 performs voltage compensation on the coupled common voltage VCOM, the compensation unit 62 generates the pre-charge/pre-discharge voltage PC (as shown in fig. 7) according to the plurality of input data DAT 1-DATN, and superimposes the pre-charge/pre-discharge voltage PC and the coupled common voltage VCOM to generate the compensated common voltage VCOM'.
In addition, the pre-charge/pre-discharge voltage PC and the coupled common voltage VCOM are inverted from each other, and the pre-charge/pre-discharge voltage PC temporally precedes the coupled common voltage VCOM. Therefore, when the pre-charge/pre-discharge voltage PC is overlapped with the coupled common voltage VCOM, most of the original noise of the coupled common voltage VCOM will be cancelled by the pre-charge/pre-discharge voltage PC with the opposite phase, so that the noise of the compensated common voltage VCOM' is greatly reduced, and the phenomenon of horizontal Crosstalk (Crosstalk) on the picture displayed by the display panel can be effectively avoided.
For example, as shown in fig. 7, when the compensation unit 62 performs voltage compensation on the coupled common voltage VCOM, the compensation unit 62 generates the pre-charge/pre-discharge voltage PC according to the plurality of input data DAT 1-DATN, and superimposes the pre-charge/pre-discharge voltage PC and the coupled common voltage VCOM to generate the compensated common voltage VCOM'.
Next, the time t1 to t4 will be described as an example.
At time t1, the output voltages VOUT (SD1) and VOUT (SD2) of the display driver circuit are at a low level, and the transition signal STB changes from the low level to a high level. At this time, the voltage level of the pre-discharge voltage PC generated by the compensation unit 62 begins to decrease, and the coupled common voltage VCOM is still maintained. Therefore, during the time period t 1-t 2, the voltage level of the compensated common voltage VCOM' generated by the pre-charge/pre-discharge voltage PC and the coupled common voltage VCOM is decreased from the ideal voltage VID to a low point at time t 2.
At time t2, the transition signal STB changes from high to low, and the output voltages VOUT (SD1) and VOUT (SD2) of the display driving circuit change from low to high. At this time, the voltage level of the pre-discharge voltage PC generated by the compensation unit 62 starts to rise from the lowest point, and the coupled common voltage VCOM starts to generate noise that rises and then falls first. In the display period DR from time t2 to time t3, since most of the noise of the coupled common voltage VCOM is cancelled by the pre-discharge voltage PC in the opposite phase, the voltage level of the compensated common voltage VCOM' generated by the pre-charge/pre-discharge voltage PC and the coupled common voltage VCOM being superimposed increases from the low point to the ideal voltage value VID and then is maintained at the ideal voltage value VID, so that the horizontal Crosstalk (Crosstalk) phenomenon in the display period DR can be effectively avoided.
At time t3, the output voltages VOUT (SD1) and VOUT (SD2) of the display driver circuit are at a high level, and the transition signal STB changes from a low level to a high level. At this time, the voltage level of the pre-discharge voltage PC generated by the compensation unit 62 starts to rise, and the coupled common voltage VCOM is maintained. Therefore, during the time period t 3-t 4, the voltage level of the compensated common voltage VCOM' generated by the pre-charge/pre-discharge voltage PC and the coupled common voltage VCOM will rise from the ideal voltage VID to a high point at time t 4.
The rest of the cases can be analogized to the above embodiments, and therefore, the description thereof is omitted.
Another embodiment according to the present invention is a common voltage compensation method. In this embodiment, the common voltage compensation method is applied to a display driving circuit, such as a source driver integrated circuit, but not limited thereto.
Referring to fig. 8, fig. 8 is a flowchart of a common voltage compensation method in this embodiment. As shown in fig. 8, the common voltage compensation method may include the following steps:
step S10: the display driving circuit receives a plurality of input data;
step S12: judging whether the coupled common voltage needs to be compensated or not according to the plurality of input data; and
Step S14: the coupled common voltage is selectively compensated according to the judgment result of the step S12 to generate a compensated common voltage, and output to the display panel.
In detail, if the determination result of the step S12 is yes, the step S14 compensates the coupled common voltage to generate a compensated common voltage; if the determination result of step S12 is no, step S14 does not compensate the coupled common voltage.
It should be noted that, when the coupled common voltage is compensated in step S14, step S14 generates a pre-charge/pre-discharge voltage according to the plurality of input data and superimposes the pre-charge/pre-discharge voltage with the coupled common voltage to generate a compensated common voltage.
In practical applications, the pre-charge/pre-discharge voltage and the coupled common voltage are in opposite phase with each other, and the pre-charge/pre-discharge voltage temporally precedes the coupled common voltage. Therefore, when the pre-charge/pre-discharge voltage is superposed with the coupled common voltage, most of the original noise of the coupled common voltage is cancelled by the pre-charge/pre-discharge voltage with the opposite phase, so that the noise of the compensated common voltage is greatly reduced, and the phenomenon of horizontal Crosstalk (Crosstalk) of the picture displayed by the display panel can be effectively avoided.
Compared with the prior art, the common voltage compensation device and the common voltage compensation method of the invention judge whether a pre-charge/pre-discharge voltage signal which is opposite to the coupled common voltage and leads in time needs to be generated or not according to a plurality of input data received by a display driving circuit (a source drive integrated circuit) so as to compensate the coupled common voltage, thereby reducing the noise of the coupled common voltage. Therefore, a panel designer does not need to reduce the noise of the common voltage by reducing the pixel capacitance of the liquid crystal display array and does not need to resist the coupling of display data by enhancing the driving capability of the common voltage, so that the complexity of the design of the display panel can be greatly reduced.
In addition, the compensation of the coupled common voltage by the common voltage compensation Device and the common voltage compensation method of the present invention can be adjusted according to different display data, different Bias setting (Bias setting) and different Device size control (Device size control) of the display panel, so that the flexibility in performing the common voltage compensation can be greatly increased.
The foregoing detailed description of the preferred embodiments is intended to more clearly illustrate the features and spirit of the present invention, and not to limit the scope of the invention by the preferred embodiments disclosed above. On the contrary, it is intended to cover various modifications and equivalent arrangements included within the scope of the claims.
Claims (13)
1. A common voltage compensation device applied to a display driving circuit, wherein the display driving circuit comprises a receiving unit and a latch unit, the receiving unit receives a plurality of input data and transmits the plurality of input data to the latch unit, the common voltage compensation device comprises:
a judging unit, coupled between the receiving unit and the latch unit, for judging whether to compensate a coupled common voltage according to the plurality of input data; and
and the compensation unit is coupled to the judgment unit and used for selectively compensating the coupled common voltage according to the judgment result of the judgment unit so as to generate a compensated common voltage.
2. The device of claim 1, wherein if the determination result of the determining unit is yes, the compensating unit compensates the coupled common voltage to generate the compensated common voltage; if the judgment result of the judgment unit is negative, the compensation unit does not compensate the coupled common voltage.
3. The common voltage compensation device applied to the display driving circuit according to claim 1, further comprising:
And the buffer unit is provided with a first input end, a second input end and an output end, wherein the first input end is coupled with the compensation unit, the second input end is coupled with the output end, and the compensated common voltage is output by the output end.
4. The apparatus of claim 3, further comprising an output pad coupled between a display panel and the output terminal of the buffer unit for outputting the compensated common voltage to the display panel.
5. The device of claim 1, wherein when the compensation unit compensates the coupled common voltage, the compensation unit generates a pre-charge/pre-discharge voltage according to the plurality of input data and superimposes the pre-charge/pre-discharge voltage on the coupled common voltage to generate the compensated common voltage.
6. The device of claim 5, wherein the pre-charge/pre-discharge voltage and the coupled common voltage are in anti-phase with each other and the pre-charge/pre-discharge voltage temporally precedes the coupled common voltage.
7. The device of claim 5, wherein the display driver circuit is a source driver integrated circuit.
8. A common voltage compensation method applied to a display driving circuit is characterized by comprising the following steps:
(a) the display driving circuit receives a plurality of input data;
(b) judging whether a coupled common voltage needs to be compensated or not according to the plurality of input data; and
(c) selectively compensating the coupled common voltage according to the judgment result of the step (b) to generate a compensated common voltage.
9. The method of claim 8, wherein if the determination result of step (b) is yes, step (c) compensates the coupled common voltage to generate the compensated common voltage; if the judgment result in the step (b) is negative, the step (c) does not compensate the coupled common voltage.
10. The method as claimed in claim 8, wherein the display driving circuit is coupled to a display panel, and the common voltage compensation method further comprises:
(d) And outputting the compensated common voltage to the display panel.
11. The method of claim 8, wherein when the step (c) compensates the coupled common voltage, the step (c) generates a pre-charge/pre-discharge voltage according to the plurality of input data and superimposes the pre-charge/pre-discharge voltage on the coupled common voltage to generate the compensated common voltage.
12. The method of claim 11, wherein the pre-charge/pre-discharge voltage and the coupled common voltage are inverse to each other and the pre-charge/pre-discharge voltage temporally precedes the coupled common voltage.
13. The method of claim 8, wherein the display driver circuit is a source driver integrated circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW108114597A TWI701655B (en) | 2019-04-25 | 2019-04-25 | Common voltage compensation apparatus and common voltage compensation method applied to display driving circuit |
| TW108114597 | 2019-04-25 |
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| CN111862896A true CN111862896A (en) | 2020-10-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113205770A (en) * | 2021-04-30 | 2021-08-03 | 北海惠科光电技术有限公司 | Crosstalk elimination method and device of display panel and display equipment |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990026582A (en) * | 1997-09-25 | 1999-04-15 | 윤종용 | A driving circuit and a driving method for a liquid crystal display device compensating a gate-off voltage |
| KR20060122255A (en) * | 2005-05-26 | 2006-11-30 | 엘지.필립스 엘시디 주식회사 | Compensating circuit for vcom and it's method |
| KR20060127504A (en) * | 2005-06-07 | 2006-12-13 | 삼성전자주식회사 | Liquid crystal display device with source driver including common voltage feedback circuit |
| KR20070094376A (en) * | 2006-03-17 | 2007-09-20 | 엘지.필립스 엘시디 주식회사 | Common voltage compansation circute for liquid crystal device |
| US20080024417A1 (en) * | 2006-07-28 | 2008-01-31 | Chunghwa Picture Tubes, Ltd. | Common voltage compensation device, liquid crystal display, and driving method thereof |
| CN103065594A (en) * | 2012-12-14 | 2013-04-24 | 深圳市华星光电技术有限公司 | Data driving circuit, liquid crystal display device and driving method |
| US20130278639A1 (en) * | 2012-04-23 | 2013-10-24 | Sitronix Technology Corp. | Display panel and driving circuit thereof |
| US20160189662A1 (en) * | 2014-12-24 | 2016-06-30 | Lg Display Co., Ltd. | Liquid crystal display and driving method thereof |
| US20160189642A1 (en) * | 2014-12-30 | 2016-06-30 | Samsung Display Co., Ltd. | Display device and driving method thereof |
| CN107369424A (en) * | 2017-08-31 | 2017-11-21 | 京东方科技集团股份有限公司 | A kind of common electric voltage compensation circuit, compensation method and display device |
| CN108986756A (en) * | 2018-07-17 | 2018-12-11 | 深圳市华星光电半导体显示技术有限公司 | common voltage feedback compensation circuit, method and liquid crystal display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI549113B (en) * | 2015-05-29 | 2016-09-11 | 鴻海精密工業股份有限公司 | Display device |
-
2019
- 2019-04-25 TW TW108114597A patent/TWI701655B/en not_active IP Right Cessation
- 2019-05-24 CN CN201910437699.0A patent/CN111862896A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990026582A (en) * | 1997-09-25 | 1999-04-15 | 윤종용 | A driving circuit and a driving method for a liquid crystal display device compensating a gate-off voltage |
| KR20060122255A (en) * | 2005-05-26 | 2006-11-30 | 엘지.필립스 엘시디 주식회사 | Compensating circuit for vcom and it's method |
| KR20060127504A (en) * | 2005-06-07 | 2006-12-13 | 삼성전자주식회사 | Liquid crystal display device with source driver including common voltage feedback circuit |
| KR20070094376A (en) * | 2006-03-17 | 2007-09-20 | 엘지.필립스 엘시디 주식회사 | Common voltage compansation circute for liquid crystal device |
| US20080024417A1 (en) * | 2006-07-28 | 2008-01-31 | Chunghwa Picture Tubes, Ltd. | Common voltage compensation device, liquid crystal display, and driving method thereof |
| US20130278639A1 (en) * | 2012-04-23 | 2013-10-24 | Sitronix Technology Corp. | Display panel and driving circuit thereof |
| CN103065594A (en) * | 2012-12-14 | 2013-04-24 | 深圳市华星光电技术有限公司 | Data driving circuit, liquid crystal display device and driving method |
| US20160189662A1 (en) * | 2014-12-24 | 2016-06-30 | Lg Display Co., Ltd. | Liquid crystal display and driving method thereof |
| US20160189642A1 (en) * | 2014-12-30 | 2016-06-30 | Samsung Display Co., Ltd. | Display device and driving method thereof |
| CN107369424A (en) * | 2017-08-31 | 2017-11-21 | 京东方科技集团股份有限公司 | A kind of common electric voltage compensation circuit, compensation method and display device |
| CN108986756A (en) * | 2018-07-17 | 2018-12-11 | 深圳市华星光电半导体显示技术有限公司 | common voltage feedback compensation circuit, method and liquid crystal display device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113205770A (en) * | 2021-04-30 | 2021-08-03 | 北海惠科光电技术有限公司 | Crosstalk elimination method and device of display panel and display equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI701655B (en) | 2020-08-11 |
| TW202040556A (en) | 2020-11-01 |
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