CN101377906B - Apparatus for quickening power supply discharge rate - Google Patents
Apparatus for quickening power supply discharge rate Download PDFInfo
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- CN101377906B CN101377906B CN2007101212144A CN200710121214A CN101377906B CN 101377906 B CN101377906 B CN 101377906B CN 2007101212144 A CN2007101212144 A CN 2007101212144A CN 200710121214 A CN200710121214 A CN 200710121214A CN 101377906 B CN101377906 B CN 101377906B
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Abstract
The invention discloses a power source discharging speed accelerating device, which comprises a liquid crystal panel, an integrated source drive circuit, an integrated grid drive circuit, a voltage adjusting circuit and a switch circuit, wherein, the voltage adjusting circuit has a power source input end, an analog power source output end, a grid cut-in voltage output end and a grid turn-off voltage output end, the analog power source output end is connected with the integrated source drive circuit, the grid cut-in voltage output end and the grid turn-off voltage output end are connected with the integrated grid drive circuit; the switch circuit is arranged in at least one output end and used for importing electric charge of a power source directly into ground when turning off the power source, thus raising the discharging speed of the power source. Through the technical proposal that the electric charge of the power source is released in time when turning off machines, the power source discharging speed accelerating device eliminates abnormal picture phenomenon and improves picture quality.
Description
Technical field
The present invention relates to a kind of device of accelerating the power supply velocity of discharge, relate in particular to a kind of device that utilizes the FET self characteristics to accelerate the power supply velocity of discharge.
Background technology
That Thin Film Transistor-LCD (TFT-LCD) has is in light weight, panelized, low-power consumption, radiationless, characteristics such as display quality is good; And the existence of these advantages must depend on good circuit; Wherein, The main part of driving circuit by the plurality of voltages source, can provide the circuit of correct digit logical signal and the backlight drive circuit that designs in order to see display frame constitutes; Certainly, different LCDs is because the difference of internal circuit also needs some different peripheral accessory circuits.
Produce circuit for plurality of voltages,, need the outside that digital voltage and aanalogvoltage are provided owing to be integrated with digital circuit and mimic channel in the liquid crystal display.In addition, in order to accomplish data scanning, need TFT to take turns On/Off.When TFT opened, data were loaded into show electrode through source electrode driver, and the voltage difference between show electrode and public electrode remakes and is used for liquid crystal and realize shows, therefore need control TFT cut-in voltage Von, close voltage Voff and common electric voltage Vcom.
When start, foregoing circuit can realize well that picture shows, but there are some drawbacks in foregoing circuit when shutdown, for example, the unusual phenomenon of picture can occur.Its main cause is: the foregoing circuit more complicated; And each power supply all parallel connection causes the electric charge release rate slow for the more filter capacitor of number, and charge discharge needs the long time; Therefore, the phenomenon that has shutdown picture display abnormality owing to can not in time discharging of power supply electric charge.
Summary of the invention
The objective of the invention is provides a kind of device of accelerating the power supply velocity of discharge through some embodiment, and the power supply electric charge can in time be discharged when shutdown, eliminates the picture abnormal occurrence, improves image quality.
For realizing above-mentioned purpose, the invention provides a kind of device of accelerating the power supply velocity of discharge, comprising:
Liquid crystal panel, the common electric voltage output terminal that comprises grid line, data line, is formed on the TFT of grid line and data line infall and common electric voltage is provided;
The source drive integrated circult is connected with data line, is used for to liquid crystal panel data-signal being provided through data line;
The grid drive integrated circult is connected with grid line, is used for to the liquid crystal panel circuit control signal being provided through grid line;
Voltage regulator circuit; Have power input, analog power output terminal, grid cut-in voltage output terminal and gate off voltage output terminal; Said analog power output terminal is connected with the source drive integrated circult, and said grid cut-in voltage output terminal is connected with the grid drive integrated circult with the gate off voltage output terminal;
On-off circuit is arranged at least one output terminal, is used for when power remove the electric charge of power supply is directly imported ground, improves the velocity of discharge of power supply.
Said on-off circuit comprises first on-off circuit; Said first on-off circuit comprises the N channel depletion type FET and first energy storage capacitor; The source electrode of said N channel depletion type FET is connected with the analog power output terminal, and grid is connected grounded drain with the input power supply; One end of said first energy storage capacitor is connected other end ground connection with the grid of said N channel depletion type FET.
Said on-off circuit comprises the second switch circuit; Said second switch circuit comprises the N channel depletion type FET and second energy storage capacitor; The source electrode of said N channel depletion type FET is connected with grid cut-in voltage output terminal, and grid is connected grounded drain with the input power supply; One end of said second energy storage capacitor is connected other end ground connection with the grid of said N channel depletion type FET.
Said on-off circuit comprises the 3rd on-off circuit; Said the 3rd on-off circuit comprises N channel depletion type FET and the 3rd energy storage capacitor; The source electrode of said N channel depletion type FET is connected with the common electric voltage output terminal, and grid is connected with logic power, grounded drain; One end of said the 3rd energy storage capacitor is connected other end ground connection with the grid of said N channel depletion type FET.
Said on-off circuit comprises the 4th on-off circuit, and said the 4th on-off circuit comprises P channel depletion type FET, and the drain electrode of said P channel depletion type FET is connected with the gate off voltage output terminal, and grid is connected grounded drain with the input power supply.
The present invention accelerates the device of the power supply velocity of discharge, utilizes the FET self characteristics, when power remove; Can rapidly the electric charge in the drain electrode directly be imported ground; Improve the velocity of discharge of power supply, eliminated the picture abnormal occurrence preferably, improved picture quality.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
Fig. 1 accelerates the structural representation of the device embodiment 1 of the power supply velocity of discharge for the present invention;
Fig. 2 accelerates the structural representation of the device embodiment 2 of the power supply velocity of discharge for the present invention;
Fig. 3 accelerates the structural representation of the device embodiment 3 of the power supply velocity of discharge for the present invention;
Fig. 4 accelerates the structural representation of the device embodiment 4 of the power supply velocity of discharge for the present invention;
Fig. 5 accelerates the structural representation of the device embodiment 5 of the power supply velocity of discharge for the present invention.
Description of reference numerals:
The 1-liquid crystal panel; 2-source drive integrated circult; 3-grid drive integrated circult;
The 4-voltage regulator circuit; The 11-grid line; The 12-data line;
51-first on-off circuit; 52-second switch circuit; 53-the 3rd on-off circuit;
54-the 4th on-off circuit; Von-grid cut-in voltage; The Voff-gate off voltage;
The Vcom-public electrode; The field effect of Q1-N channel depletion type field effect Q2-N channel depletion type
Pipe; Pipe;
The field effect of Q3-N channel depletion type field effect Q4-P channel depletion type
Pipe; Pipe.
Embodiment
Fig. 1 accelerates the structural representation of the device embodiment 1 of the power supply velocity of discharge for the present invention; Shown in Fig. 1, the device of accelerating the power supply velocity of discharge comprises liquid crystal panel 1, source drive integrated circult 2, grid drive integrated circult 3, voltage regulator circuit 4 and on-off circuit.Wherein, liquid crystal panel 1 comprises the TFT of grid line 11, data line 12 and grid line 11 and data line 12 infalls; Source drive integrated circult 2 is connected with data line 12, is used for to liquid crystal panel 1 data-signal being provided; Grid drive integrated circult 3 is connected with grid line 11, is used for to liquid crystal panel 1 control signal being provided; Voltage regulator circuit 4 has power input, analog power output terminal, grid cut-in voltage output terminal and gate off voltage output terminal; The analog power output terminal is connected with source drive integrated circult 2, and grid cut-in voltage output terminal is connected with grid drive integrated circult 3 with the gate off voltage output terminal;
On-off circuit comprises first on-off circuit 51; First on-off circuit 51 comprises the N channel depletion type FET Q1 and the first energy storage capacitor C1, and the source electrode of above-mentioned N channel depletion type FET Q1 is connected with the analog power output terminal, and grid is connected with input power vd D; Grounded drain; The end of the first energy storage capacitor C1 is connected with the grid of N channel depletion type FET Q1, and other end ground connection is used to accelerate the velocity of discharge of power supply.
When the circuit operate as normal, analog power AVDD is about 12V, and input power vd D is about 5V, so the voltage difference Vgs between grid and source electrode＜0, N channel depletion type FET Q1 does not work, and is in off-state; When the circuit general supply was turn-offed, voltage regulator circuit quit work, and analog power AVDD begins to descend; Because input power supply vdd terminal links to each other with the first energy storage capacitor C1, so the velocity of discharge is slower, when analog power AVDD terminal voltage is lower than input power vd D terminal voltage; Voltage difference Vgs between grid and source electrode＞0; N channel depletion type FET Q1 starts working, and impels source electrode and drain electrode conducting, and the electric charge on the analog power AVDD is directly imported ground; Make analog power AVDD discharge rapidly, thereby improved the velocity of discharge of analog power AVDD.
Said apparatus; Utilize N channel depletion type FET Q1 self characteristics, behind power remove, N channel depletion type FET Q1 starts working; Can rapidly the electric charge on the source electrode directly be imported ground; Improve the velocity of discharge of power supply, eliminated the abnormal occurrence that picture occurs preferably, improved picture quality.
Fig. 2 accelerates the structural representation of the device embodiment 2 of the power supply velocity of discharge for the present invention, and shown in Fig. 2, the difference of this embodiment and the foregoing description is; On-off circuit comprises second switch circuit 52; Second switch circuit 52 comprises the N channel depletion type FET Q2 and the second energy storage capacitor C2, and the source electrode of above-mentioned N channel depletion type FET Q2 is connected with grid cut-in voltage output terminal, and grid is connected with input power vd D; Grounded drain; The end of the second energy storage capacitor C2 is connected with the grid of N channel depletion type FET Q2, and other end ground connection is used to accelerate the velocity of discharge of power supply.
When the circuit operate as normal, grid cut-in voltage Von is about 25V, and input power vd D is about 5V, so the voltage difference Vgs between grid and source electrode＜0, N channel depletion type FET Q2 does not work, and is in off-state; When the circuit general supply was turn-offed, voltage regulator circuit quit work, and grid cut-in voltage Von begins to descend; Because input power supply vdd terminal links to each other with the first energy storage capacitor C2, so the velocity of discharge is slower, when grid cut-in voltage Von terminal voltage is lower than input power vd D terminal voltage; Voltage difference Vgs between grid and source electrode＞0; N channel depletion type FET Q2 starts working, and impels source electrode and drain electrode conducting, and the electric charge on the grid cut-in voltage Von is directly imported ground; Make grid cut-in voltage Von discharge rapidly, thereby improved the velocity of discharge of grid cut-in voltage Von.
Said apparatus; Utilize N channel depletion type FET Q2 self characteristics, behind power remove, N channel depletion type FET Q2 starts working; Can rapidly the electric charge on the source electrode directly be imported ground; Improve the velocity of discharge of power supply, eliminated the abnormal occurrence that picture occurs preferably, improved picture quality.
Fig. 3 accelerates the structural representation of the device embodiment 3 of the power supply velocity of discharge for the present invention, and as shown in Figure 3, the difference of this embodiment and the foregoing description is; On-off circuit comprises the 3rd on-off circuit 53; The 3rd on-off circuit 53 comprises N channel depletion type FET Q3 and the 3rd energy storage capacitor C3, and the source electrode of above-mentioned N channel depletion type FET Q3 is connected with the common electric voltage output terminal, and grid is connected with logic power DVDD; Grounded drain; The end of the 3rd energy storage capacitor C3 is connected with the grid of N channel depletion type FET Q3, and other end ground connection is used to accelerate the velocity of discharge of power supply.
When the circuit operate as normal, public electrode voltages Vcom is about 5V, and logic supply voltage DVDD is about 3.3V, so the voltage difference Vgs between grid and source electrode＜0, N channel depletion type FET Q3 does not work, and is in off-state; When the circuit general supply was turn-offed, TFT quit work, and common electric voltage Vcom begins to descend; Because logic power DVDD end links to each other with the 3rd energy storage capacitor C3, so the velocity of discharge is slower, when common electric voltage Vcom is lower than logic power DVDD terminal voltage; Voltage difference Vgs between grid and source electrode＞0; N channel depletion type FET Q3 starts working, and impels source electrode and drain electrode conducting, and the electric charge on the common electric voltage Vcom is directly imported ground; Make common electric voltage Vcom discharge rapidly, thereby improved the velocity of discharge of common electric voltage Vcom.
Said apparatus; Utilize N channel depletion type FET Q3 self characteristics, behind power remove, N channel depletion type FET Q3 starts working; Can rapidly the electric charge on the source electrode directly be imported ground; Improve the velocity of discharge of power supply, eliminated the abnormal occurrence that picture occurs preferably, improved the quality of picture.
Fig. 4 accelerates the structural representation of the device embodiment 4 of the power supply velocity of discharge for the present invention, and as shown in Figure 4, the difference of this embodiment and the foregoing description is; On-off circuit comprises the 4th on-off circuit 54; The 4th on-off circuit 54 comprises P channel depletion type FET Q4, and the drain electrode gate off voltage output terminal of above-mentioned P channel depletion type FET Q4 connects, and grid is connected with input power vd D; Grounded drain is used to accelerate the velocity of discharge of power supply.
During the circuit operate as normal, the source voltage of P channel depletion type FET Q4 is 0V, and grid voltage is the voltage of input power vd D; Be about 5V; So voltage difference Vgs ≈ 5V＞0 between grid and source electrode, P channel depletion type FET Q4 does not work, and is in off-state; When the circuit general supply was turn-offed, voltage regulator circuit quit work, and the voltage of input power vd D drops to 0V rapidly; Voltage difference Vgs=0 between grid and source electrode; P channel depletion type FET Q4 starts working, and impels source electrode and drain electrode conducting, and the electric charge on the gate off voltage Voff is directly imported ground; Make gate off voltage Voff discharge rapidly, thereby improved the velocity of discharge of Voff.
Said apparatus utilizes P channel depletion type FET Q4 self characteristics, behind power remove; When pipe is started working, rapidly the electric charge on the source electrode is directly imported ground, improved the turn-off speed of power supply; Eliminate the abnormal occurrence that picture occurs preferably, improved picture quality.
Fig. 5 accelerates the structural representation of the device embodiment 5 of the power supply velocity of discharge for the present invention; As shown in Figure 5; The difference of this embodiment and the foregoing description is, on-off circuit comprises first on-off circuit 51, second switch circuit 52, second switch circuit 53 and second switch circuit 54.Wherein, First on-off circuit 51 comprises the N channel depletion type FET Q1 and the first energy storage capacitor C1; The source electrode of above-mentioned N channel depletion type FET Q1 is connected with the analog power output terminal, and grid is connected grounded drain with input power vd D; The end of the first energy storage capacitor C1 is connected other end ground connection with the grid of N channel depletion type FET Q1; Second switch circuit 52 comprises the N channel depletion type FET Q2 and the second energy storage capacitor C2; The source electrode of above-mentioned N channel depletion type FET Q2 is connected with grid cut-in voltage output terminal; Grid is connected with input power vd D; Grounded drain, the end of the second energy storage capacitor C2 is connected other end ground connection with the grid of N channel depletion type FET Q2; The 3rd on-off circuit 53 comprises N channel depletion type FET Q3 and the 3rd energy storage capacitor C3; The source electrode of above-mentioned N channel depletion type FET Q3 is connected with the common electric voltage output terminal; Grid is connected with logic power DVDD; Grounded drain, the end of the 3rd energy storage capacitor C3 is connected other end ground connection with the grid of N channel depletion type FET Q3; The 4th on-off circuit 54 comprises P channel depletion type FET Q4, and the drain electrode of above-mentioned P channel depletion type FET Q4 is connected with the gate off voltage output terminal, and grid is connected grounded drain with input power vd D; Be used to accelerate the velocity of discharge of power supply.
When the circuit general supply was turn-offed, TFT quit work, and common electric voltage Vcom begins to descend; Because logic power DVDD end links to each other with the 3rd energy storage capacitor C3, so the velocity of discharge is slower, when common electric voltage Vcom is lower than logic power DVDD terminal voltage; N channel depletion type FET Q3 starts working, and impels source electrode and drain electrode conducting, and the electric charge on the common electric voltage Vcom is directly imported ground; Make common electric voltage Vcom discharge rapidly, thereby improved the velocity of discharge of common electric voltage Vcom; Simultaneously, the voltage of analog power AVDD also begins to descend, because input power supply vdd terminal links to each other with the first energy storage capacitor C1; So the velocity of discharge is slower, when analog power AVDD terminal voltage was lower than input power vd D terminal voltage, N channel depletion type FET Q1 started working; Impel source electrode and drain electrode conducting; Electric charge on the analog power AVDD is directly imported ground, make analog power AVDD discharge rapidly, improved the velocity of discharge of analog power AVDD; Simultaneously, grid cut-in voltage Von also begins to descend, because input power supply vdd terminal links to each other with the second energy storage capacitor C2; So the velocity of discharge is slower, when grid cut-in voltage Von terminal voltage was lower than input power vd D terminal voltage, N channel depletion type FET Q2 started working; Impel source electrode and drain electrode conducting; Electric charge on the grid cut-in voltage Von is directly imported ground, make grid cut-in voltage Von discharge rapidly, improved the velocity of discharge of grid cut-in voltage Von; In addition; The voltage of input power vd D drops to 0V rapidly, and promptly during Vgs=0, P channel depletion type FET Q4 starts working; Impel source electrode and drain electrode conducting; Electric charge on the gate off voltage Voff is directly imported ground, make gate off voltage Voff discharge rapidly, thereby improved the velocity of discharge of Voff.
Said apparatus utilizes the FET self characteristics, behind power remove; When pipe is started working, will drain rapidly or source electrode on electric charge directly import ground, improved the velocity of discharge of power supply; Eliminate the abnormal occurrence that picture occurs preferably, improved picture quality.
What should explain at last is: above each embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (8)
1. a device of accelerating the power supply velocity of discharge is characterized in that, comprising:
Liquid crystal panel, the common electric voltage output terminal that comprises grid line, data line, is formed on the TFT of grid line and data line infall and common electric voltage is provided;
The source drive integrated circult is connected with data line, is used for to liquid crystal panel data-signal being provided through data line;
The grid drive integrated circult is connected with grid line, is used for to the liquid crystal panel circuit control signal being provided through grid line;
Voltage regulator circuit; Have power input, analog power output terminal, grid cut-in voltage output terminal and gate off voltage output terminal; Said analog power output terminal is connected with the source drive integrated circult, and said grid cut-in voltage output terminal is connected with the grid drive integrated circult with the gate off voltage output terminal;
On-off circuit is arranged at least one output terminal, is used for when power remove the electric charge of power supply is directly imported ground, improves the velocity of discharge of power supply.
Said on-off circuit comprises first on-off circuit; Said first on-off circuit comprises the N channel depletion type FET and first energy storage capacitor; The source electrode of said N channel depletion type FET is connected with the analog power output terminal, and grid is connected grounded drain with the input power supply; One end of said first energy storage capacitor is connected other end ground connection with the grid of said N channel depletion type FET.
2. the device of the quickening power supply velocity of discharge according to claim 1; It is characterized in that: said on-off circuit comprises the second switch circuit; Said second switch circuit comprises the N channel depletion type FET and second energy storage capacitor; The source electrode of said N channel depletion type FET is connected with grid cut-in voltage output terminal, and grid is connected grounded drain with the input power supply; One end of said second energy storage capacitor is connected other end ground connection with the grid of said N channel depletion type FET.
3. the device of the quickening power supply velocity of discharge according to claim 1; It is characterized in that: said on-off circuit comprises the 3rd on-off circuit; Said the 3rd on-off circuit comprises N channel depletion type FET and the 3rd energy storage capacitor; The source electrode of said N channel depletion type FET is connected with the common electric voltage output terminal, and grid is connected with logic power, grounded drain; One end of said the 3rd energy storage capacitor is connected other end ground connection with the grid of said N channel depletion type FET.
4. the device of the quickening power supply velocity of discharge according to claim 1; It is characterized in that: said on-off circuit comprises the 4th on-off circuit; Said the 4th on-off circuit comprises P channel depletion type FET; The drain electrode of said P channel depletion type FET is connected with the gate off voltage output terminal, and grid is connected grounded drain with the input power supply.
5. the device of the quickening power supply velocity of discharge according to claim 2; It is characterized in that: said on-off circuit comprises the 3rd on-off circuit; The 3rd on-off circuit comprises N channel depletion type FET and the 3rd energy storage capacitor; The source electrode of said N channel depletion type FET is connected with the common electric voltage output terminal, and grid is connected with logic power, grounded drain; One end of said the 3rd energy storage capacitor is connected other end ground connection with the grid of said N channel depletion type FET.
6. the device of the quickening power supply velocity of discharge according to claim 2; It is characterized in that: said on-off circuit comprises the 4th on-off circuit; Said the 4th on-off circuit comprises P channel depletion type FET; The drain electrode of said P channel depletion type FET is connected with the gate off voltage output terminal, and grid is connected grounded drain with the input power supply.
7. the device of the quickening power supply velocity of discharge according to claim 3; It is characterized in that: said on-off circuit comprises the 4th on-off circuit; Said the 4th on-off circuit comprises P channel depletion type FET; The drain electrode of said P channel depletion type FET is connected with the gate off voltage output terminal, and grid is connected grounded drain with the input power supply.
8. the device of the quickening power supply velocity of discharge according to claim 5; It is characterized in that: said on-off circuit comprises the 4th on-off circuit; Said the 4th on-off circuit comprises P channel depletion type FET; The drain electrode of said P channel depletion type FET is connected with the gate off voltage output terminal, and grid is connected grounded drain with the input power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101212144A CN101377906B (en) | 2007-08-31 | 2007-08-31 | Apparatus for quickening power supply discharge rate |
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| CN2007101212144A CN101377906B (en) | 2007-08-31 | 2007-08-31 | Apparatus for quickening power supply discharge rate |
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| CN101377906A CN101377906A (en) | 2009-03-04 |
| CN101377906B true CN101377906B (en) | 2012-07-18 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101859553A (en) * | 2010-07-07 | 2010-10-13 | 上海贝岭股份有限公司 | Control circuit for liquid crystal display (LCD) driver |
| CN102314847B (en) * | 2011-09-06 | 2013-09-11 | 深圳市华星光电技术有限公司 | Corner cutting circuit in LCD driving system |
| KR101622896B1 (en) * | 2012-10-19 | 2016-05-19 | 샤프 가부시키가이샤 | Display device and drive method thereof |
| CN103927993B (en) * | 2013-12-18 | 2016-04-27 | 上海中航光电子有限公司 | Display backlight control circuit, method and display device |
| KR102374748B1 (en) * | 2015-06-30 | 2022-03-17 | 엘지디스플레이 주식회사 | Power supply and display device using the same |
| CN105118460B (en) * | 2015-09-17 | 2017-10-31 | 广东欧珀移动通信有限公司 | The electric charge method for releasing and device of a kind of LCDs |
| TWI562126B (en) * | 2015-09-30 | 2016-12-11 | Hon Hai Prec Ind Co Ltd | Liquid crystal display device and discharge control method thereof |
| CN105609080B (en) * | 2016-03-16 | 2018-03-06 | 深圳市华星光电技术有限公司 | The top rake circuit of adjustable top rake waveform and the adjusting method of top rake waveform |
| CN107784990B (en) * | 2017-10-31 | 2019-10-01 | 京东方科技集团股份有限公司 | The charging method of liquid crystal display panel, electric discharge adjust circuit and display device |
| CN107886922A (en) * | 2017-12-08 | 2018-04-06 | 南京中电熊猫平板显示科技有限公司 | Liquid crystal display device and the method for improving liquid crystal display device power down splashette |
| CN109377964B (en) * | 2018-12-20 | 2021-03-19 | 惠科股份有限公司 | Discharge circuit, drive circuit and display device |
| CN109712590A (en) * | 2019-03-08 | 2019-05-03 | 惠科股份有限公司 | Driving circuit of display panel and display device |
| CN109979375B (en) * | 2019-05-27 | 2019-08-16 | 南京中电熊猫平板显示科技有限公司 | A kind of shutdown control circuit and display device of display device |
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| CN1920925A (en) * | 2005-08-26 | 2007-02-28 | 群康科技(深圳)有限公司 | System for modifying close remain image of liquid crystal display |
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| CN1920925A (en) * | 2005-08-26 | 2007-02-28 | 群康科技(深圳)有限公司 | System for modifying close remain image of liquid crystal display |
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