CN101419789A - Restoration device for liquid crystal device and driving method thereof - Google Patents
Restoration device for liquid crystal device and driving method thereof Download PDFInfo
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- CN101419789A CN101419789A CNA2008102040489A CN200810204048A CN101419789A CN 101419789 A CN101419789 A CN 101419789A CN A2008102040489 A CNA2008102040489 A CN A2008102040489A CN 200810204048 A CN200810204048 A CN 200810204048A CN 101419789 A CN101419789 A CN 101419789A
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000004973 liquid crystal related substance Substances 0.000 title description 14
- 230000002045 lasting effect Effects 0.000 claims abstract description 9
- 239000004065 semiconductor Substances 0.000 claims description 13
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract 1
- 230000008439 repair process Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 10
- 230000003321 amplification Effects 0.000 description 3
- 210000002858 crystal cell Anatomy 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention relates to a restoration device of an LCD and a driving method thereof; the restoration device comprises an overdrive operational amplifier which inputs reset control signal and data signal, when the reset control signal is in high level, overdrive signal is output; when the reset control signal is in low level, normal data signal is output; wherein, an overdrive time real time adjustable device which is used for regulating the lasting time of high level of the reset control signal is arranged in front of the operational amplifier. The restoration device of the LCD and the driving method thereof can correspondingly regulate restoration signals according to the position of broken wire on a panel and the lingering measurement of actual restoration wire RC, thus avoiding the poor restoration of over-charging and under charging.
Description
Technical field
The present invention relates to a kind of prosthetic device and driving method thereof of LCD, particularly relate to a kind of prosthetic device and driving method thereof of LCD that can online adjustment repair signal.
Background technology
Liquid crystal indicator (LCD) is to utilize the variation that is clipped in electric field intensity on the liquid crystal molecule, and the power that changes the orientation control printing opacity of liquid crystal molecule is come display image.At present, liquid crystal indicator since its have in light weight, volume is little, thin thickness, be used in widely in the various big-and-middle undersized terminal presentation facilities.In general, liquid crystal indicator comprises LCD panel with picture element matrix and the driving circuit that is used to drive this LCD panel.
As shown in Figure 1, liquid crystal indicator comprises: display panels 11, and it has picture element matrix; Gate drivers 12 is used for the gate lines G L of display panels 11 is driven gating; Source electrode driver 14 is used for the data line DL of display panels 11 is driven; Wherein, gate drivers 12 and source electrode driver 14 are by time schedule controller 13 controls.At display panels 11, there is liquid crystal in each zone that between gate lines G L and data line DL, intersects, liquid crystal cells Clc becomes matrix distribution in display panels 11; In the zone of this intersection, there is a thin film transistor (TFT) TFT, as the residing gate lines G L of TFT during by gating, the data-signal of data line DL charges into liquid crystal cells Clc, and keeps this data-signal by Cs; The other end of Cs electric capacity is communicated with by a CS electrode wires parallel with gate lines G L; Liquid crystal cells Clc changes the state of liquid crystal according to signal, shows to realize GTG thereby control transmittance.
In the LCD of reality produces,, generally can import the design of repairing line in order to occur the bad of broken string on the repair data line.And increase along with the size of LCD in recent years, the RC that repairs line postpones also constantly to increase, in order to improve the repair ability under big RC postpones, Chinese patent CN200810034156.6 provides a kind of repairing line operation amplification circuit, and this repairing line operation amplification circuit is referred to as the repairing line operation multiplying arrangement of overdriving hereinafter.See also Fig. 2, this repairing line operation multiplying arrangement of overdriving can make the picture signal that is applied to the reparation line in the incipient a bit of time (overpotential time) under the control of external signal Control_signal, make signal voltage in positive polarity, will be higher than normal image signal voltage, and in negative polarity, will be lower than positive Changde image signal voltage.So just can make the picture signal that is in reparation line end can reach target voltage values in the short period of time, thereby solve in the pixel of repairing the line end because picture signal postpones can't reach too greatly the problem of required voltage owing to RC in the sweep time in delegation.
Yet in the production application of reality, the broken string position of the data line on the TFT panel can't be estimated in advance, and the actual RC of the reparation line the when broken string of diverse location is repaired postpones to exist more different.The RC that repairs line 2 when as shown in Figure 3, the actual repair line is used postpones to postpone much larger than the RC that repairs line 1.Therefore, in actual applications, when the above-mentioned repairing line operation multiplying arrangement of overdriving is repaired repairing line, be difficult to estimate the overpotential time of reparation, two kinds of faulty restoration phenomenons shown in Figure 4 may appear, faulty restoration that promptly overcharges and the faulty restoration of owing to charge.
In order to tackle the faulty restoration phenomenon that may occur when the above-mentioned repairing line operation multiplying arrangement counter plate of overdriving is repaired, when actual repair, need postpone the different adjustment of carrying out repair signal with actual RC according to the position of repairing line, but the cycle of presetting control signal of prior art and high level lasting time generally directly are stored in the ROM the inside by T-CON producer, in case be to be difficult to adjust after setting.
Summary of the invention
Technical matters to be solved by this invention provides a kind of prosthetic device and driving method thereof of LCD, correspondingly adjust repair signal according to the size that the position of breaking on the panel and actual repair line RC postpone, avoid occurring the generation of overcharging or owing to charge faulty restoration.
The present invention solves the problems of the technologies described above the prosthetic device that the technical scheme that adopts provides a kind of LCD, comprise the computing multiplying arrangement of overdriving, control signal and data-signal are preset in the described computing multiplying arrangement input of overdriving, the output signal of overdriving when presetting control signal for high level is exported normal data signal for for low level the time when presetting control signal; Wherein, also be provided with the time Adjustable real-time device of overdriving before the described computing multiplying arrangement, the described time Adjustable real-time device of overdriving is used for adjusting the described control signal high level lasting time that presets.
The prosthetic device of above-mentioned LCD, wherein, the described time Adjustable real-time device of overdriving comprises a PWM modulator and a modulation resistor.
The prosthetic device of above-mentioned LCD, wherein, the described time Adjustable real-time device of overdriving comprises first metal-oxide-semiconductor, control signal is preset in its grid connection, grounded drain, source electrode connects the high level current potential by first resistor; In the source electrode junction of first resistor and first metal-oxide-semiconductor, connect the modulation terminal of modulation resistor; Arbitrary terminal in the modulation resistor except that the modulation terminal is connected with first capacitor; The other end of first capacitor is connected with the grid of the 2nd MOS; The grounded drain of second metal-oxide-semiconductor, source electrode connects high level voltage by second resistor; In the junction of second metal-oxide-semiconductor and second resistor, output is adjusted control signal to the described computing multiplying arrangement of overdriving.
The present invention may further comprise the steps for solving the problems of the technologies described above the driving method of the prosthetic device that a kind of above-mentioned LCD also is provided:
A) the described time Adjustable real-time device of overdriving receives and presets the control signal input, adjusts high level lasting time, and output adjustment controls signal to the described computing multiplying arrangement of overdriving;
B) the described computing multiplying arrangement of overdriving receives the data-signal of repairing on the line, under the effect of described adjustment control signal, periodically exports overdrive signal and normal data signal.
The present invention contrasts prior art following beneficial effect: the prosthetic device of LCD provided by the invention and driving method thereof, on the basis of the existing computing multiplying arrangement of overdriving, increase a kind of time Adjustable real-time device of overdriving, this device is correspondingly adjusted repair signal according to the size that the position of breaking on the panel and actual repair line RC postpone, thereby avoids occurring the generation of overcharging or owing to charge faulty restoration.
Description of drawings
Fig. 1 is the structure of liquid crystal display panel synoptic diagram of prior art.
Fig. 1 is existing liquid crystal indicator structural representation.
Fig. 2 is the repairing line operation amplification circuit synoptic diagram of overdriving of prior art.
Difference when Fig. 3 is the application of actual repair line is repaired position view.
Fig. 4 a is the faulty restoration synoptic diagram that overcharges.
Fig. 4 b is the faulty restoration synoptic diagram of owing to charge.
Fig. 5 is the system architecture diagram of technical solution of the present invention.
Fig. 6 is the system architecture diagram of the embodiment of the invention one.
Fig. 7 is the system architecture diagram of the embodiment of the invention two.
Among the figure:
11 display panels, 12 gate drivers, 13 time schedule controllers
The 14 source electrode drivers 15 computing multiplying arrangement of overdriving
The 16 time Adjustable real-time devices of overdriving
Embodiment
The invention will be further described below in conjunction with accompanying drawing and exemplary embodiments.
Fig. 5 is the system architecture diagram of technical solution of the present invention.
See also Fig. 5, the prosthetic device of the LCD among the present invention, comprise the computing multiplying arrangement 15 of overdriving, input end and the output terminal of computing multiplying arrangement 15 of overdriving links to each other with the two ends of broken string respectively, control signal and data-signal are preset in computing multiplying arrangement 15 inputs of overdriving, the output signal of overdriving when presetting control signal for high level is exported normal data signal for for low level the time when presetting control signal; Wherein, also be provided with the time Adjustable real-time device 16 of overdriving before the computing multiplying arrangement, the time Adjustable real-time device 16 of overdriving is used for adjusting the described control signal high level lasting time that presets.
The driving method of the prosthetic device of above-mentioned LCD may further comprise the steps:
A) overdrive time Adjustable real-time device 16 receives and presets the control signal input, adjusts high level lasting time, and output adjustment controls signal to the computing multiplying arrangement 15 of overdriving;
B) overdrive computing multiplying arrangement 15 receives the data-signal of repairing on the lines, under the effect of described adjustment control signal, and overdrive signal and normal data signal of output periodically.
Embodiment one
Fig. 6 is the system architecture diagram of the embodiment of the invention one.
See also Fig. 6, the Adjustable real-time device 16 of overdriving in the present embodiment comprises PWM (width modulation) modulator and a modulation resistor, the PWM modulator provides input terminal and links to each other with described modulation resistor, is the output duty cycle of scalable PWM modulator by regulating the modulation resistor.To preset control signal input PWM modulator, this repetition period of presetting control signal is pixel duration of charging TP, and high level lasting time is an overpotential time T 1; This presets the adjustment of control signal through the PWM modulator, and the signal input end of control signal to the repairing line operation multiplying arrangement 15 of overdriving adjusted in output; The repetition period of this adjustment control signal is similarly pixel duration of charging TP, but high level time is adjusted into overpotential time T 2; The modulation resistor is connected with the PWM modulator, and the resistance of its modulation resistor is corresponding with the output duty cycle of PWM adjuster; Therefore, panel is repaired personnel can be according to the position and the reparation display effect of broken data wire, adjust the resistance of modulation resistor, the ratio of overpotential time T 2 and pixel duration of charging TP in the control adjustment control signal, thereby correspondingly adjust repair signal, avoid occurring the generation of overcharging or owing to charge faulty restoration.
Embodiment two
Fig. 7 is the system architecture diagram of the embodiment of the invention two.
See also Fig. 7, the Adjustable real-time device 16 of overdriving in the present embodiment comprises: the first metal-oxide-semiconductor Q1, and control signal is preset in its grid connection, grounded drain, source electrode connects the high level current potential by first resistor R 1; In the source electrode junction of first resistor R 1 and the first metal-oxide-semiconductor Q1, connect the modulation terminal of modulation resistor VR; Arbitrary terminal among the modulation resistor VR except that the modulation terminal is connected with the first capacitor C1; The other end of the first capacitor C1 is connected with the grid of the second metal-oxide-semiconductor Q2; The grounded drain of the second metal-oxide-semiconductor Q2, source electrode connects high level voltage by second resistor R 2; In the junction of the second metal-oxide-semiconductor Q2 and second resistor R 2, the signal input end of control signal to the repairing line operation multiplying arrangement 15 of overdriving adjusted in output.Equally, panel is repaired personnel can and repair the effect that shows according to the position of broken data wire, adjusts the resistance of modulation resistor in the foregoing circuit, thereby correspondingly adjusts repair signal, avoids occurring the generation of overcharging or owing to charge faulty restoration.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (4)
1, a kind of prosthetic device of LCD, comprise the computing multiplying arrangement of overdriving, control signal and data-signal are preset in the described computing multiplying arrangement input of overdriving, the output signal of overdriving when presetting control signal for high level is exported normal data signal for for low level the time when presetting control signal; It is characterized in that also be provided with the time Adjustable real-time device of overdriving before the described computing multiplying arrangement, the described time Adjustable real-time device of overdriving is used for adjusting the described control signal high level lasting time that presets.
2, the prosthetic device of LCD according to claim 1 is characterized in that, the described time Adjustable real-time device of overdriving comprises a PWM modulator and a modulation resistor.
3, the prosthetic device of LCD according to claim 2 is characterized in that, the described time Adjustable real-time device of overdriving comprises:
First metal-oxide-semiconductor, control signal is preset in its grid connection, grounded drain, source electrode connects the high level current potential by first resistor;
In the source electrode junction of first resistor and first metal-oxide-semiconductor, connect the modulation terminal of modulation resistor; Arbitrary terminal in the modulation resistor except that the modulation terminal is connected with first capacitor;
The other end of first capacitor is connected with the grid of the 2nd MOS; The grounded drain of second metal-oxide-semiconductor, source electrode connects high level voltage by second resistor;
In the junction of second metal-oxide-semiconductor and second resistor, output is adjusted control signal to the described computing multiplying arrangement of overdriving.
4, a kind of driving method of prosthetic device of LCD according to claim 1 is characterized in that, said method comprising the steps of:
A) the described time Adjustable real-time device of overdriving receives and presets the control signal input, adjusts high level lasting time, and output adjustment controls signal to the described computing multiplying arrangement of overdriving;
B) the described computing multiplying arrangement of overdriving receives the data-signal of repairing on the line, under the effect of described adjustment control signal, periodically exports overdrive signal and normal data signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102040489A CN101419789B (en) | 2008-12-04 | 2008-12-04 | Restoration device for liquid crystal device and driving method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102040489A CN101419789B (en) | 2008-12-04 | 2008-12-04 | Restoration device for liquid crystal device and driving method thereof |
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| Publication Number | Publication Date |
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| CN101419789A true CN101419789A (en) | 2009-04-29 |
| CN101419789B CN101419789B (en) | 2010-12-01 |
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| CN2008102040489A Expired - Fee Related CN101419789B (en) | 2008-12-04 | 2008-12-04 | Restoration device for liquid crystal device and driving method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013242A (en) * | 2010-12-09 | 2011-04-13 | 深圳市华星光电技术有限公司 | Device and method for repairing broken data line |
| CN102495486A (en) * | 2011-12-07 | 2012-06-13 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal display device and repairing method thereof |
| CN107369418A (en) * | 2017-08-04 | 2017-11-21 | 中国科学院光电技术研究所 | Liquid crystal overdrive implementation method based on FPGA |
| CN108231025A (en) * | 2018-01-07 | 2018-06-29 | 苏州锵创智能设备有限公司 | A kind of source electrode drive circuit and liquid crystal display device |
| CN108257564A (en) * | 2018-01-07 | 2018-07-06 | 苏州锵创智能设备有限公司 | A kind of liquid crystal display driving method |
| CN112071282A (en) * | 2020-09-27 | 2020-12-11 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal display module and peripheral repair line compensation method thereof |
| WO2022217642A1 (en) * | 2021-04-12 | 2022-10-20 | Tcl华星光电技术有限公司 | Backlight driving method and display panel |
-
2008
- 2008-12-04 CN CN2008102040489A patent/CN101419789B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013242A (en) * | 2010-12-09 | 2011-04-13 | 深圳市华星光电技术有限公司 | Device and method for repairing broken data line |
| WO2012075650A1 (en) * | 2010-12-09 | 2012-06-14 | 深圳市华星光电技术有限公司 | Apparatus for repairing broken data line and method thereof |
| US8836622B2 (en) | 2010-12-09 | 2014-09-16 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Data line repair apparatus and method thereof |
| CN102495486A (en) * | 2011-12-07 | 2012-06-13 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal display device and repairing method thereof |
| CN107369418A (en) * | 2017-08-04 | 2017-11-21 | 中国科学院光电技术研究所 | Liquid crystal overdrive implementation method based on FPGA |
| CN107369418B (en) * | 2017-08-04 | 2019-08-02 | 中国科学院光电技术研究所 | Liquid crystal overdrive implementation method based on FPGA |
| CN108231025A (en) * | 2018-01-07 | 2018-06-29 | 苏州锵创智能设备有限公司 | A kind of source electrode drive circuit and liquid crystal display device |
| CN108257564A (en) * | 2018-01-07 | 2018-07-06 | 苏州锵创智能设备有限公司 | A kind of liquid crystal display driving method |
| CN108231025B (en) * | 2018-01-07 | 2020-09-08 | 赤峰埃晶电子科技有限公司 | Source electrode driving circuit and liquid crystal display device |
| CN112071282A (en) * | 2020-09-27 | 2020-12-11 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal display module and peripheral repair line compensation method thereof |
| WO2022217642A1 (en) * | 2021-04-12 | 2022-10-20 | Tcl华星光电技术有限公司 | Backlight driving method and display panel |
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| Publication number | Publication date |
|---|---|
| CN101419789B (en) | 2010-12-01 |
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Owner name: NANJING CEC PANDA LCD TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SVA (GROUP) CO., LTD. Effective date: 20110613 |
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Free format text: CORRECT: ADDRESS; FROM: 200233 3/F, NO. 757, YISHAN ROAD, XUHUI DISTRICT, SHANGHAI TO: 210038 NO. 9, HENGYI ROAD, NANJING ECONOMIC AND TECHNOLOGICAL DEVELOPMENT ZONE, NANJING CITY, JIANGSU PROVINCE |
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Effective date of registration: 20110613 Address after: 210038 Nanjing economic and Technological Development Zone, Jiangsu Province, Hengyi Road, No. 9, No. Patentee after: NANJING CEC PANDA LCD TECHNOLOGY Co.,Ltd. Address before: 200233, Shanghai, Yishan Road, No. 757, third floor, Xuhui District Patentee before: SVA OPTRONICS |
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Granted publication date: 20101201 |