CN101281728A - Method and apparatus for switching adaptability gamma conversion voltage - Google Patents
Method and apparatus for switching adaptability gamma conversion voltage Download PDFInfo
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- CN101281728A CN101281728A CNA2007100968027A CN200710096802A CN101281728A CN 101281728 A CN101281728 A CN 101281728A CN A2007100968027 A CNA2007100968027 A CN A2007100968027A CN 200710096802 A CN200710096802 A CN 200710096802A CN 101281728 A CN101281728 A CN 101281728A
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Abstract
The present invention discloses an adaptive method and a device for switching gamma switching voltage. In the present invention, a quantifying unit obtains quantified brightness data from video data. The adaptive gamma voltage switching core adjusts the gamma switching voltage dynamically according to the quantified brightness data to provide output to a panel, so that the panel shows inserted black frames and dynamic images in adaptive contrast in alternate. The method and device provided in the present invention can not only enhance image contrast and reduce blur, but also solve the problem of weak brightness cause be insertion of black frames.
Description
Technical field
The invention relates to a kind of changing method and device thereof, and particularly relevant for a kind of adaptability gamma conversion voltage changing method and device thereof.
Background technology
(consumer is also more and more high for the requirement of LCD for Liquid Crystal Display, LCD) flourish, requires not only that product weight is light, volume is little, also requires picture color bright-coloured, clear bright simultaneously along with LCD.At modern's demand, each tame manufacturer all develops many technology, improves the quality that picture presents.
(Thin-Film Transistor Liquid Crystal Display TFT-LCD) is example with the membrane transistor LCD.In present technology,, mainly improve target and can be divided into color (Color) and handle, strengthen contrast (Contrast Enhancement), and reduce fuzzy (Blurreduce) for the application of dynamic menu quality improving.
Fig. 1 describes the circuit block diagram of existing contrast reference voltages means.Please refer to Fig. 1, existing contrast reference voltages means mainly is made up of a control panel (Control Board) 11 and 12 of source electrode drive circuits (SourceDriver Integrated Circuit).Wherein control panel 11 has comprised time schedule controller (TimingController, TCON) 113 with series resistor and buffer cell (Resistance-string and Buffers) 115, in order to receiving video data (Video Data), and send video signal data and the appropriate control signals of arranging in pairs or groups to drive source electrode drive circuit 12.
Fig. 2 describes the circuit diagram of existing series resistor and buffer cell.Fig. 3 describes existing fixed formula gamma graph.Please refer to Fig. 2 and Fig. 3.The contrast reference voltage of general traditional TFT-LCD is to be formed by the electric resistance partial pressure that is connected in series.The contrast reference voltage can't change after series resistor is set.Fixing because of the resistance value of its dividing potential drop, causing gamma (Gamma) family curve is fixing can't the change.And only transfer magnitude of voltage to offer source electrode drive circuit 12 in the conventional art with one group of gamma characteristic order of a curve, export panel 21 to by source electrode drive circuit 12 again, therefore no matter any picture all uses the fixed gamma characteristic curve of Fig. 3 as adjustment.And there is no the mechanism of judging picture on the conventional architectures, therefore also can't do suitable gamma curve adjustment with the display characteristic of dynamic picture.In brief, the major defect of this framework is the lightness that can't suitably show color under the dynamic menu, and this shortcoming can significantly reduce display quality.
In the processing of picture, reducing fuzzy also is one of important theme, and common minimizing fuzzy technology has excessive driving (Over Drive), picture black frame insertion (Black Insertion, BI) and optics self-compensating birefringence mode (Optically self-Compensated Birefringence, OCB) ... Deng.The prerequisite that drives owing to overuse is to need fixing gamma characteristic curve, therefore when gamma curve be not fixedly the time, Driving technique then can't overuse.Also just make dynamic menu to reach and use the gamma characteristic curve to strengthen dynamic menu, reach again and reduce the fuzzy suitable degree of difficulty that has.
Picture black frame insertion mainly is divided into data black plug and black plug dual mode backlight.Aspect the data black plug, its method be the normal pictures data of TFT-LCD and black picture data Alternation Display in two picture frames, or distribute and be shown in the picture frame.Also be divided into two big classes aspect the black plug backlight, one of them is the flicker open and close backlight (Blinking/Flash Backlight) of TFT-LCD; Another way is open and close in proper order (the Scanning Backlight) backlight of TFT-LCD.But black plug shortcoming backlight increases control hardware structure backlight for needing, and cost increases; Reducing backlight assembly life-span and backlight open time needs accurately to cooperate the response characteristic of liquid crystal, adjusts to be difficult for.Not only so, no matter use data black plug or black plug backlight, all can cause the problem of brightness deterioration, how effectively the compensate for brightness deficiency also is the place of problem.
In U.S. Patent Publication a kind of OCB drive device for display is then proposed for US2006/0017682 number, utilize power supply supply control circuit, providing independently, picture black frame insertion reference voltage and image reference voltage increase the problem that the picture black frame insertion rate causes picture brightness and contrast to reduce to source electrode driver to improve.But it must provide independently voltage just can reach picture black frame insertion, and so still the complexity of circuit does not promote yet, and more needs to expend more cost.
In view of this, suitable settling mode there's no one who doesn't or isn't is eager to seek in the relevant manufacturer of panel, to overcome above-mentioned problem.
Summary of the invention
Purpose of the present invention is providing a kind of adaptability gamma conversion voltage changing method exactly, strengthens and reduce fuzzy pictures in order to contrast, and then promotes display effect.
Another object of the present invention is providing a kind of adaptability gamma conversion voltage switching device shifter exactly, strengthens and reduce fuzzy pictures in order to contrast, and then promotes display effect.
According to above purpose, the present invention proposes a kind of adaptability gamma conversion voltage changing method, and this adaptability gamma conversion voltage changing method may further comprise the steps: the statistics video signal data quantizes brightness data to obtain one of video signal data.Dynamically adjust a gamma conversion voltage so that this gamma conversion voltage conversion video signal data to be provided according to this quantification brightness data.Switching this gamma conversion voltage makes panel insert a black plug picture.
According to above purpose, the present invention proposes a kind of adaptability gamma conversion voltage switching device shifter in addition, and this adaptability gamma conversion voltage switching device shifter comprises quantifying unit and gamma switch unit.This quantifying unit obtains the quantification brightness data of video signal data by the brightness cumulative distribution function of statistics video signal data.Adaptability gamma voltage switches core dynamically adjusts gamma conversion voltage to provide this gamma conversion voltage to D/A conversion unit according to quantizing brightness data, wherein D/A conversion unit uses making panel alternately present black plug picture and adaptation contrast dynamic menu according to this gamma conversion voltage conversion video signal data.
The present invention can adjust the intensity of correlation data because of having the structure of dynamic adjustment gamma conversion voltage, increases visual brightness, improves the dynamic menu quality.The advantage that not only has dynamic contrast to strengthen, picture black frame insertion reduces fuzzy, has more compensated the luminance shortage phenomenon that causes because of picture black frame insertion.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. is described in detail below.
Description of drawings
Fig. 1 describes the circuit block diagram of existing contrast reference voltages means.
Fig. 2 describes the circuit diagram of existing series resistor and buffer cell.
Fig. 3 describes existing fixed formula gamma graph.
Fig. 4 describes the circuit block diagram that the embodiment of the invention contains the liquid crystal display drive circuit of adaptability gamma conversion voltage switching device shifter.
Fig. 5 A describes the circuit block diagram of the adaptability gamma voltage switching core 427 of the embodiment of the invention.
Circuit and peripheral circuit that Fig. 5 B describes the adaptability gamma voltage switching core 427 of the embodiment of the invention concern calcspar.
Fig. 6 describes the control signal oscillogram of the adaptability gamma voltage switching device 42 of the embodiment of the invention.
Fig. 7 describes the curve map of the contrast of preferred embodiment of the present invention to output brightness.
Fig. 8 describes the circuit block diagram that another embodiment of the present invention contains the liquid crystal display drive circuit of adaptability gamma conversion voltage switching device shifter.
Fig. 9 A describes the circuit block diagram that embodiment of the invention adaptability gamma voltage switches core 827.
Circuit and peripheral circuit that Fig. 9 B describes embodiment of the invention adaptability gamma voltage switching core 827 concern calcspar.
Figure 10 describes another contrast that the embodiment of the invention illustrates graph of a relation to output brightness.
Embodiment
Fig. 4 describes the circuit block diagram that the embodiment of the invention contains the liquid crystal display drive circuit of adaptability gamma conversion voltage switching device shifter.Please refer to Fig. 4, this liquid crystal display drive circuit comprises time schedule controller (Timing Controller, TCON) 411, panel 413, digital-to-analogue conversion (Digital Analog Converter, DAC) unit 415, adjustable (Backlight) backlight unit 417, adaptability gamma voltage switching device (Adaptive GammaVoltage Switching Device) 42, light sensor (Light Sensor) 421.Time schedule controller 411 couples mutually with panel 413, provides panel 413 to show required control signal and data, and panel 413 is in order to video data.These data have comprised video signal data (Video Data).D/A conversion unit 415 is adjusted in order to give different gamma characteristic curves according to different display frame, digital signal data is converted in order to drive the voltage of pixel, and, be converted to the source electrode drive circuit that simulation contrast voltage data exports panel 413 to the digital contrast voltage data that adaptability gamma voltage switching device 42 is provided.
And it should be noted that adaptability gamma voltage switching device (Adaptive Gamma VoltageSwitching Device) 42 comprises that further histogram extraction cells (Histogram Extraction) 423, quantifying unit (Equalization) 425, adaptability gamma voltage switch core (Adapt Gamma VoltageSwitch Core.Be called for short AGVS) 427, arithmetic element (Arithmetic) 429.Histogram extraction cells (Histogram Extraction) 423 is responsible for the video signal data of input is extracted histogram, obtains to count probability distribution function (Probability Distribution Function, PDF) data.Quantifying unit 425 couples mutually with histogram extraction cells 423, and quantifying unit 425 is utilized the PDF data statistics and obtained a cumulative distribution function (Cumulative Distribution Function, CDF) data.Then according to these CDF data, can obtain contrasting input contrast behind the modulation to output contrast mapping (Mapping) data.Again this input contrast is exported to adaptability gamma voltage to output contrast mapping (enum) data and switch core 427.In other words, adaptability gamma voltage switches core 427 promptly dynamically adjusts gamma conversion voltage according to quantizing brightness data, and provides gamma conversion voltage to D/A conversion unit 415.415 of D/A conversion units are according to gamma conversion voltage conversion video signal data, use making panel 413 alternately present the black plug picture and adapt to the contrast dynamic menu.And above-mentioned be to analyze dynamic menu with this, could give suitable contrast thereafter along with the variation of different pictures and strengthen.
Adaptability gamma voltage switches core 427 except synchronous reception time series data (Vertical Sync in the above-mentioned adaptability gamma voltage switching device, Dena) and outside the monochrome information that detects of panel 413 glazed thread sensors 421, also receive input contrast behind the contrast modulation to output contrast mapping (enum) data.Adaptability gamma voltage switch core 427 with above-mentioned data processing after, produce brightness control signal, adapt to the contrast dynamic menu/voltage mapping (enum) data of black plug picture Alternation Display, digital revolving die is intended (DAC) control signal.Wherein the adjustable back light unit 417 of brightness control signal may command is the problems that are used for compensating luminance shortage that picture black frame insertion causes.
The DAC control signal then is used for control figure analog-converted unit 415 and whether enables, and makes D/A conversion unit 415 that digital contrast voltage data is changed into simulation contrast voltage data.Arithmetic element (Arithmetic) 429 is coupled to adaptability gamma voltage and switches between core 427 and the D/A conversion unit 415, the adaptation that arithmetic element 429 is produced adaptability gamma voltage switching core 427 contrasts the voltage mapping (enum) data of dynamic menu/black plug picture Alternation Display, via producing digital contrast reference voltage after the computing, sequence exports D/A conversion unit 415 to.Then following will being described in further detail at adaptability gamma voltage switching core 427 inside structures.
Fig. 5 A describes the circuit block diagram of the adaptability gamma voltage switching core 427 of the embodiment of the invention.Circuit and peripheral circuit that Fig. 5 B describes the adaptability gamma voltage switching core 427 of the embodiment of the invention concern calcspar.Please refer to Fig. 5 A and Fig. 5 B.Adaptability gamma voltage switches core 427 and comprises light engine (OpticalEngine) 4271, black plug switching device shifter (BI Switch Device) 4273, control signal generator (CtrlSignal Generator) 4275 corresponding with the voltage input and output (Vin/Vout Mapping) unit 4277.Wherein light engine 4271 provides brightness control signal to adjustable back light unit 417 after the monochrome information that receives from light sensor 421, to adjust backlight illumination.After black plug switching device shifter 4273 receives time series data, output black plug switching signal BI Ctrl.The corresponding unit 4277 of voltage input and output couples mutually with black plug switching device shifter 4273, its input contrast after according to the contrast modulation of reception quantifying unit 425 is to the black plug switching signal BI Ctrl of output contrast data with black plug switching device shifter 4273, and output adapts to the voltage mapping (enum) data of contrast dynamic menu/black plug picture Alternation Display to arithmetic element 429.4275 of control signal generators are exported the DAC control signal synchronously and are given D/A conversion unit 415, whether enable in order to control figure analog-converted unit 415.
Fig. 6 describes the control signal oscillogram of the adaptability gamma voltage switching device 42 of the embodiment of the invention.Please refer to Fig. 6.When black plug switching signal BI Ctrl is under the situation of logical one, panel 413 can present black picture; Otherwise working as black plug switching signal BI Ctrl is under the situation of logical zero, and panel 413 can present and adapt to the contrast dynamic menu.In other words, adaptability gamma voltage switching device 42 can produce the picture enable signal according to time series data and black plug switching signal BI Ctrl, makes display frame alternately present black plug picture and adaptation contrast dynamic menu, reaches enhancing to when reducing fuzzy effect.
Fig. 7 describes the curve map of the contrast of preferred embodiment of the present invention to output brightness.Please refer to Fig. 7.Curve A is a fundamental curve, that is picture is not through contrasting the gamma curve that strengthens.Because the luminance compensation technology that the light sensor is provided, the situation that adapts to the contrast dynamic menu can be divided into two kinds of curves.First kind is curve B, and another kind is a curve C.The adaptability contrast performance graph that curve B is adjusted for no brightness can obviously be found out more highlight of its brightness ratio curve A.Curve C is the adaptability contrast performance graph that has brightness to adjust.Because light engine 4271 directly adjusts adjustable back light unit 417, though so the brightness of curve C brighter compared to curve B, curve but has the relatively poor phenomenon generation of luminance saturation at boundary vicinity.Curve D is that the black plug curve numerical value of also can saying so is zero gamma conversion voltage.When black plug switching signal BI Ctrl is under the situation of logical one, utilizing curve D to make output brightness is 0.In other words this moment, picture presented black picture, and using provides picture black frame insertion.The above-mentioned dynamic menu that not only provides contrasts enhancing, and it is fuzzy to cooperate the picture black frame insertion technology to reduce, and the while has compensated the problem of the luminance shortage that causes because of picture black frame insertion again.
The present technique field has knows also visual its demand of the knowledgeable usually, and changes embodiment according to spirit of the present invention and previous embodiment.Continue to list another embodiment to describe the present invention in detail with next.Fig. 8 describes the circuit block diagram that another embodiment of the present invention contains the liquid crystal display drive circuit of adaptability gamma conversion voltage switching device shifter.This liquid crystal display drive circuit comprises time schedule controller 811, panel 813, D/A conversion unit 815, adjustable back light unit 817, adaptability gamma voltage switching device 82, light sensor 821.This embodiment and previous embodiment difference are that adaptability gamma voltage switches the structure of core 827, and this embodiment framework removes the problem of improving the black plug luminance shortage, also solves the problem of luminance saturation.Its mode is not directly to control adjustable back light unit 817, but adjusts dynamic contrast intensity, comes the problem of compensation panel 813 because of luminance shortage that picture black frame insertion causes, and improves luminance saturation problem backlight.Then switching core 827 at adaptability gamma voltage further describes in detail.
Fig. 9 A describes the circuit block diagram that embodiment of the invention adaptability gamma voltage switches core 827.Circuit and peripheral circuit that Fig. 9 B describes embodiment of the invention adaptability gamma voltage switching core 827 concern calcspar.Please refer to Fig. 9 A and Fig. 9 B.Wherein adaptability gamma voltage switching core 827 comprises light engine 8271, black plug switching device shifter 8273, the corresponding unit 8277 with the voltage input and output of control signal generator 8275.Wherein light engine 8271 receives the monochrome information of light sensor 821, and output luminance compensation voltage gives the voltage input and output corresponding unit 8277.The corresponding 8277 black plug switching signal BI Ctrl according to luminance compensation voltage and black plug switching device shifter 8273 in unit of voltage input and output use compensation and adapt to the brightness of contrast dynamic menu and the voltage mapping (enum) data that output adapts to contrast dynamic menu/black plug picture Alternation Display.In other words, after light engine 8271 responsible monochrome informations with gained are handled, be converted to the corresponding unit of voltage input and output 8277 required contrast modulations and import contrast output contrast mapping value, direct compensation is because of the problem of luminance shortage that picture black frame insertion causes, and solved the adjustable back light unit 817 bright saturated problem that causes.
Figure 10 describes another contrast that the embodiment of the invention illustrates graph of a relation to output brightness, and curve A 1, curve B 1, curve D 1 are identical with previous embodiment, do not repeat them here.A1 is basic dynamic compensation curve, B1 is the dynamic compensation adjustment, D1 is the black plug curve, it is after the monochrome information of panel 813 glazed thread sensors 821 is received that curve C 1 please refer to this embodiment, and export to and be converted to the corresponding unit 8277 of voltage input and output, directly promote adaptively, avoid directly adjusting the situation that brightness causes the boundary value distortion, therefore solved the problem of luminance saturation specific strength and luminance compensation.
In sum, preferred embodiment of the present invention proposes one with adaptability gamma voltage device for switching, via the output of control gamma conversion voltage, with the gamma conversion voltage switching mode, reaches the purpose of black plug.Wherein the switching of gamma conversion voltage is via change input and output voltage mapping relations, reaches the purpose of switched voltage.And cooperate light sensor sensed luminance data, revise the input and output voltage mapping relations,, increase visual brightness, improve the dynamic menu quality to adjust the intensity of correlation data.The advantage that not only has dynamic contrast to strengthen, picture black frame insertion reduces fuzzy, has more compensated the luminance shortage phenomenon that causes because of picture black frame insertion.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limiting the present invention, anyly has the knack of this skill person, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is when with being as the criterion that claim was defined.
Claims (12)
1. adaptability gamma conversion voltage changing method, this adaptability gamma conversion voltage changing method may further comprise the steps:
Add up a video signal data and quantize brightness data to obtain one of this video signal data;
Dynamically adjust a gamma conversion voltage according to this quantification brightness data and change this video signal data so that this gamma conversion voltage to be provided; And
Switching this gamma conversion voltage makes this panel insert a black plug picture.
2. adaptability gamma conversion voltage changing method as claimed in claim 1 is characterized in that, by changing input and output voltage mapping relations to reach switched voltage.
3. adaptability gamma conversion voltage changing method as claimed in claim 1 is characterized in that, also comprises the light that this panel of sensing shows, and obtains a monochrome information, and adjust a backlight assembly according to this monochrome information.
4. adaptability gamma conversion voltage changing method as claimed in claim 1 is characterized in that, also comprises the light that this panel of sensing shows, and obtains a monochrome information, and adjust this gamma switched voltage according to this monochrome information.
5. adaptability gamma conversion voltage changing method as claimed in claim 1 is characterized in that, this quantification brightness data is obtained by following steps:
The histogram that extracts this video signal data obtains a brightness probability distribution function;
Add up this brightness probability distribution function and obtain a brightness cumulative distribution function; And
Calculate this brightness cumulative distribution function and obtain this quantification brightness data.
6. adaptability gamma conversion voltage switching device shifter, this adaptability gamma conversion voltage switching device shifter comprises:
One quantifying unit obtains one of this video signal data by the brightness cumulative distribution function of adding up a video signal data and quantizes brightness data; And
One adaptability gamma voltage switches core, dynamically adjust a gamma conversion voltage to provide this gamma conversion voltage according to this quantification brightness data to a D/A conversion unit, wherein this D/A conversion unit is changed this video signal data according to this gamma conversion voltage, uses to make a panel alternately present black plug picture and adaptation contrast dynamic menu.
7. adaptability gamma conversion voltage switching device shifter as claimed in claim 6 is characterized in that, it is that zero gamma conversion voltage is used and made this panel present the black plug picture that this D/A conversion unit receives one group of numerical value.
8. adaptability gamma conversion voltage switching device shifter as claimed in claim 6 is characterized in that, also comprises:
One first light sensor, the light that this panel of this first light sensor sensing shows, and obtain a monochrome information, and adjust a backlight assembly according to this monochrome information.
9. adaptability gamma conversion voltage switching device shifter as claimed in claim 8 is characterized in that, this adaptability gamma voltage switches core and comprises:
One light engine, receiving provides after this monochrome information a brightness control signal to use the backlight illumination of adjusting this backlight assembly to a backlight assembly;
One black plug switching device shifter, receive a time series data after, export a black plug switching signal;
One control signal generator, receive this time series data after, the output control signal is given this D/A conversion unit, uses this D/A conversion unit of control and whether enables; And
The corresponding unit of one voltage input and output is coupled to this black plug switching device shifter and this quantifying unit, and it is according to this black plug switching signal of this black plug switching device shifter, and output adapts to the voltage mapping (enum) data of contrast dynamic menu/black plug picture Alternation Display.
10. adaptability gamma conversion voltage switching device shifter as claimed in claim 6 is characterized in that, also comprises:
One second light sensor, the light that this panel of this second light sensor sensing shows, and obtain a monochrome information, and adjust this gamma switched voltage that this adaptability gamma voltage switches core according to this monochrome information.
11. adaptability gamma conversion voltage switching device shifter as claimed in claim 10 is characterized in that, this adaptability gamma voltage switches core and comprises:
One light engine receives after this monochrome information and exports a luminance compensation voltage;
One black plug switching device shifter, receive a time series data after, export a black plug switching signal;
One control signal generator, receive this time series data after, the output control signal is given this D/A conversion unit, uses this D/A conversion unit of control and whether enables; And
The corresponding unit of one voltage input and output, be coupled to this black plug switching device shifter, this quantifying unit and this light engine, receive this luminance compensation voltage and this black plug switching signal, use compensation and adapt to the brightness of contrast dynamic menu and the voltage mapping (enum) data that output adapts to contrast dynamic menu/black plug picture Alternation Display.
12. adaptability gamma conversion voltage switching device shifter as claimed in claim 6 is characterized in that, also comprises:
One Nogata acquisition unit, this Nogata acquisition unit counts this brightness probability distribution function by this video signal data and then tries to achieve a brightness cumulative distribution function, and this quantifying unit obtains this quantification brightness data by this brightness cumulative distribution function.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100968027A CN101281728A (en) | 2007-04-03 | 2007-04-03 | Method and apparatus for switching adaptability gamma conversion voltage |
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| CNA2007100968027A CN101281728A (en) | 2007-04-03 | 2007-04-03 | Method and apparatus for switching adaptability gamma conversion voltage |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102214353A (en) * | 2010-04-01 | 2011-10-12 | 承景科技股份有限公司 | Image enhancement apparatus and image enhancement method |
| CN101833920B (en) * | 2009-03-13 | 2012-09-26 | 华映视讯（吴江）有限公司 | Drive circuit and grey insertion method for liquid crystal display |
| WO2016197408A1 (en) * | 2015-06-08 | 2016-12-15 | 深圳市华星光电技术有限公司 | Display device capable of performing black frame insertion |
| WO2017028351A1 (en) * | 2015-08-20 | 2017-02-23 | 深圳市华星光电技术有限公司 | Liquid crystal display drive device and liquid crystal display drive method |
| CN109036293A (en) * | 2018-07-27 | 2018-12-18 | 青岛小鸟看看科技有限公司 | A kind of liquid crystal display brightness regulating circuit and a kind of liquid crystal display |
| WO2019061605A1 (en) * | 2017-09-27 | 2019-04-04 | 深圳市华星光电半导体显示技术有限公司 | Method for compensating voltage of oled, compensation circuit, and display device |
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- 2007-04-03 CN CNA2007100968027A patent/CN101281728A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101833920B (en) * | 2009-03-13 | 2012-09-26 | 华映视讯（吴江）有限公司 | Drive circuit and grey insertion method for liquid crystal display |
| CN102214353A (en) * | 2010-04-01 | 2011-10-12 | 承景科技股份有限公司 | Image enhancement apparatus and image enhancement method |
| CN102214353B (en) * | 2010-04-01 | 2013-12-04 | 承景科技股份有限公司 | Image enhancement apparatus and image enhancement method |
| WO2016197408A1 (en) * | 2015-06-08 | 2016-12-15 | 深圳市华星光电技术有限公司 | Display device capable of performing black frame insertion |
| WO2017028351A1 (en) * | 2015-08-20 | 2017-02-23 | 深圳市华星光电技术有限公司 | Liquid crystal display drive device and liquid crystal display drive method |
| WO2019061605A1 (en) * | 2017-09-27 | 2019-04-04 | 深圳市华星光电半导体显示技术有限公司 | Method for compensating voltage of oled, compensation circuit, and display device |
| US10657896B2 (en) | 2017-09-27 | 2020-05-19 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Voltage compensation method, compensation circuit, and display apparatus of OLED |
| CN109036293A (en) * | 2018-07-27 | 2018-12-18 | 青岛小鸟看看科技有限公司 | A kind of liquid crystal display brightness regulating circuit and a kind of liquid crystal display |
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Open date: 20081008 |