CN101388199B - Pre-reinforcing module for liquid crystal display and drive method thereof - Google Patents
Pre-reinforcing module for liquid crystal display and drive method thereof Download PDFInfo
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- CN101388199B CN101388199B CN2008102024452A CN200810202445A CN101388199B CN 101388199 B CN101388199 B CN 101388199B CN 2008102024452 A CN2008102024452 A CN 2008102024452A CN 200810202445 A CN200810202445 A CN 200810202445A CN 101388199 B CN101388199 B CN 101388199B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000003014 reinforcing effect Effects 0.000 claims description 26
- 230000008439 repair process Effects 0.000 claims description 25
- 230000003111 delayed effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- 101150046160 POL1 gene Proteins 0.000 description 6
- 101100117436 Thermus aquaticus polA gene Proteins 0.000 description 6
- 210000002858 crystal cell Anatomy 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a prestressing module of a liquid crystal display device and a driving method thereof, the prestressing module comprises a first operational amplifier, a second operational amplifier, a third operational amplifier and a forth operational amplifier, wherein a positive input end of the first operational amplifier is connected with an input signal end and external voltage simultaneously, a negative input end is connected with an output end through a resistance, a positive input end of the second operational amplifier is connected with an input signal end, the negative input end is shortly connected with an output end, the positive input end of the third operational amplifier is connected with the input signal end, a negative input end is connected with the external voltage, the positive input end of the forth operational amplifier is connected with the input signal end, and the negative input end is shortly connected with the output end. The front portion of the negative input end of each operational amplifier is equipped with an input control switch, and the rear portion of the output end is equipped with an output control switch. The prestressing module of the liquid crystal display device and the driving method thereof solve the poor display of a repairing line, which is caused because RC of the repairing line is delayed in a 2Line inversion type.
Description
Technical field
The present invention relates to a kind of pre-reinforcing module and driving method thereof of liquid crystal indicator, particularly relate to a kind of pre-reinforcing module and driving method thereof that improves the liquid crystal indicator of repairing line RC delay.
Background technology
The TFT liquid crystal panel comprises TFT substrate 4 respect to one another and CF (color Filter) substrate 5, wherein TFT substrate 4 comprises many sweep traces that intersect vertically mutually 6 and many data lines 7, described sweep trace 6 is driven by scanning chip 1, described data line 7 is driven by data chip 2, pcb board 3 (Printed Circuit Board) provides signal for scanning chip 1 and data chip 2, specifically as described in Figure 1.Because the TFT liquid crystal panel is made, the phenomenon that data line disconnects takes place through regular meeting, the upper end still can normally show from data chip 2 to broken string, but the data-signal of back, lower end, broken string place can not normally transmit, and therefore causes data presentation undesired.
For broken string is repaired, existing technology is line 8 to be repaired by first on the array base palte in the upper end of broken string be drawn out on the pcb board 3, amplify by the operational amplifier on the pcb board 3 10 then, be transferred to the data line lower end of breaking repairing line 9 from pcb board 3 through second on array (Array) substrate again, as shown in Figure 2 through amplifying signal.
Because the characteristic of liquid crystal material itself needs to adopt various reversing mode to drive display panels, the polarity by charging data in each liquid crystal cells that periodically reverses reduces flicker and image retention.Because the state of liquid crystal is controlled with the voltage difference of public electrode current potential by the data-signal Vdata that liquid crystal cells is charged into, and controls the transmitance of light then; When voltage difference is timing, definition charging data are positive polarity; When voltage difference when negative, definition charging data are negative polarity.Can be consuming time in balance flicker level and source drive, the reversing mode of a kind of 2Line commonly used.See also Fig. 3, in the reversing mode of 2Line, the data-signal that is provided to the liquid crystal cells of horizontal direction arrangement has opposite polarity with the interval of a liquid crystal cells respectively, and the data-signal that is provided to the liquid crystal cells of vertical direction arrangement has opposite polarity with the interval of two liquid crystal cells respectively.Reverse to the polarity of each data-signal in interval at every frame, as shown in Figure 3, each data-signal is opposite in the polarity of Fn frame and Fn+1 frame.Because the influence that second RC that repairs line 9 and data line postpones on the array base palte, when the polarity of display voltage is that unit reverses with 2Line, signal between the same polarity difference can occur after repairing line and data line, the signal that is first line in the same polarity is owing to the reason that postpones, in article one line duration of charging T1, do not reach target voltage or need just to arrive for a long time target voltage, and the signal of second row of same polarity is because polarity is identical, the process that does not have delay, so in second line duration of charging T2, can remain on target voltage, as shown in Figure 4.For above-mentioned reasons, the voltage difference that the pixel on two lines of same polarity reaches at last causes the difference of demonstration, form show bad.
Summary of the invention
Technical matters to be solved by this invention provides a kind of pre-reinforcing module of liquid crystal indicator, solves under the 2Line inversion mode, because the reparation line that the RC of reparation line postpones to be caused shows bad.
The present invention solves the problems of the technologies described above the pre-reinforcing module that the technical scheme that adopts provides a kind of liquid crystal indicator, comprising:
First operational amplifier, positive input terminal links to each other with the input signal end, and links to each other with external voltage by resistance R 1, and negative input end links to each other with output terminal by resistance R 5;
Second operational amplifier, positive input terminal links to each other with the input signal end, negative input end and output terminal short circuit;
The 3rd operational amplifier, positive input terminal links to each other with the input signal end by resistance R 7, and negative input end links to each other with external voltage by resistance R 3;
Four-operational amplifier, positive input terminal links to each other with the input signal end, negative input end and output terminal short circuit;
Wherein, the positive input terminal of each operational amplifier links to each other with the input signal end by the input gauge tap, and output terminal links to each other with output signal end by output control switch.
The present invention is for solving the problems of the technologies described above the driving method of the pre-reinforcing module that a kind of above-mentioned liquid crystal indicator also is provided, the input signal end of described pre-reinforcing module and first is repaired line and is linked to each other, output signal end and second is repaired line and is linked to each other, the first reparation line and second is repaired line and is linked to each other with the two ends up and down of the data line that breaks respectively, described data line adopts the 2line reversing mode to drive, and the driving method of this pre-reinforcing module comprises:
If repair data line signal is the positive polarity reverse signal, then the first operational amplifier output cathode is strengthened signal in advance;
If repair data line signal is the positive polarity holding signal, the normal output cathode repair signal of second operational amplifier then;
If repair data line signal is the negative polarity reverse signal, then the 3rd operational amplifier output negative pole is strengthened signal in advance;
If repair data line signal is the negative polarity holding signal, the normal output negative pole repair signal of four-operational amplifier then.
The driving method of the pre-reinforcing module of above-mentioned liquid crystal indicator, described positive polarity are strengthened voltage of signals in advance and are higher than the positive polarity target voltage, and described negative polarity is strengthened signal in advance and is lower than the negative polarity target voltage.
The present invention contrasts prior art following beneficial effect: the pre-reinforcing module of liquid crystal indicator provided by the invention and method thereof, by the alternately pre-reinforcement of output and normal both positive and negative polarity data-signal of four operational amplifiers, solved under the 2Line inversion mode, because the reparation line that the RC delay of reparation line is caused is bad.
Description of drawings
Fig. 1 is the wire break of liquid crystal display device synoptic diagram.
Fig. 2 is that existing wire break of liquid crystal display device is repaired synoptic diagram.
Fig. 3 is a liquid crystal indicator 2Line inversion driving synoptic diagram.
Fig. 4 is that data line RC postpones synoptic diagram.
Fig. 5 is that the present invention strengthens signal and effect synoptic diagram thereof in advance.
Fig. 6 is a pre-reinforcing module circuit diagram of the present invention.
Fig. 7 is the control signal oscillogram of Fig. 6.
Among the figure:
1 scanning chip, 2 data chip 3PCB plates
4TFT substrate 5CF substrate 6 sweep traces
7 data lines 8 first are repaired line 9 second and are repaired line
10 operational amplifiers, 11 first operational amplifiers, 12 second operational amplifiers
13 the 3rd operational amplifiers, 14 four-operational amplifiers
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
The invention discloses a kind of pre-reinforcing module and driving method thereof of liquid crystal indicator.The liquid crystal indicator that the present invention uses can be referring to Fig. 2, the present invention is by strengthening in advance handling to the repair signal that is drawn out to from TFT substrate 4 on the pcb board 3 at pre-reinforcing module of increase on the pcb board 3, wherein the part of desire reinforcement is the signal of article one line in the repair signal, and the signal of second line remains unchanged.Wherein, positive polarity is strengthened voltage of signals in advance and is higher than the positive polarity target voltage, and negative polarity is strengthened signal in advance and is lower than the negative polarity target voltage.
After pre-reinforcement of signal process of article one line, can make actual charging voltage in article one line duration of charging T1, arrive target voltage, as shown in Figure 5.
Fig. 6 is a pre-reinforcing module circuit diagram of the present invention.
See also Fig. 6, the present invention has provided the realization circuit of a pre-reinforcing module.This circuit is made up of resistance, a plurality of switch (SW) that 4 operational amplifiers, a plurality of resistance equate.Wherein the positive input terminal of first operational amplifier 11 is connected to resistance R 1, R2, and negative input end is connected with resistance R 5, R6, and output terminal is connected with resistance R 5, switch SW 11, and the end of R1 is connected to an external voltage V1, and the end of R2 connects switch SW 3; The positive input terminal of second operational amplifier 12 is connected to switch SW 4, and negative input end and output terminal short circuit also are connected to switch SW 8; The positive input terminal of the 3rd operational amplifier 13 is connected to resistance R 7, R8, and negative input end is connected with resistance R 3, R4, and output terminal is connected with resistance R 4, switch SW 9, and the end of R3 is connected to an external voltage V1, and the end of R7 connects switch SW 3; The positive input terminal of four-operational amplifier 14 is connected to switch SW 6, and negative input end and output terminal short circuit also are connected to switch SW 10.
Be connected to switch SW 1, SW2 after the repair signal input, the pre-reinforcement of process is handled and is connected to switch SW 11, SW12 exports then.
The concrete course of work is described below:
When POL, POL1 are high level, switch SW 1, SW3, SW7, SW11 closure, pre-reinforcing module carries out positive polarity to the repair signal of article one line and strengthens in advance.There are following relation: Vout=Vin+V1 in the repair signal Vin of input and the repair signal Vout of output;
At POL is high level, when POL1 is low level, and switch SW 1, SW4, SW8, SW11 closure, the repair signal of the normal output cathode second of pre-reinforcing module line, Vout=Vin;
At POL is low level, when POL1 is high level, and switch SW 2, SW5, SW9, SW12 closure, pre-reinforcing module carries out negative polarity to the repair signal of article one line and strengthens in advance.There are following relation: Vout=Vin-V1 in the repair signal Vin of input and the repair signal Vout of output;
When POL, POL1 are low level, switch SW 2, SW6, SW10, SW12 closure, the repair signal of the normal output negative pole second of pre-reinforcing module line, Vout=Vin.
The pre-reinforcing module of liquid crystal indicator provided by the invention and method thereof, by the alternately pre-reinforcement of output and normal both positive and negative polarity data-signal of four operational amplifiers, solved under the 2Line inversion mode, because the reparation line that the RC delay of reparation line is caused is bad.Wherein, positive polarity is strengthened voltage of signals in advance and is higher than the positive polarity target voltage, and negative polarity is strengthened signal in advance and is lower than the negative polarity target voltage, strengthens the size of signal in advance and can regulate by external voltage V1 and resistance.Pre-reinforcing module provided by the invention is at the pre-reinforcement of repairing the line analog signals, has only several because generally repair line, can not increase how many costs.Normal data lines is strengthened if desired in advance then can be in the inner realization of data chip.
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 (3)
1. the pre-reinforcing module of a liquid crystal indicator is characterized in that, this pre-reinforcing module comprises:
First operational amplifier, positive input terminal links to each other with the input signal end, and links to each other with external voltage by resistance R 1, and negative input end links to each other with output terminal by resistance R 5;
Second operational amplifier, positive input terminal links to each other with the input signal end, negative input end and output terminal short circuit;
The 3rd operational amplifier, positive input terminal links to each other with the input signal end by resistance R 7, and negative input end links to each other with external voltage by resistance R 3;
Four-operational amplifier, positive input terminal links to each other with the input signal end, negative input end and output terminal short circuit;
Wherein, the positive input terminal of each operational amplifier links to each other with the input signal end by the input gauge tap, and output terminal links to each other with output signal end by output control switch.
2. the driving method of the pre-reinforcing module of a liquid crystal indicator as claimed in claim 1, the input signal end of described pre-reinforcing module and first is repaired line and is linked to each other, output signal end and second is repaired line and is linked to each other, the first reparation line and second is repaired line and is linked to each other with the two ends up and down of the data line that breaks respectively, described data line adopts the 2line reversing mode to drive, and the driving method of this pre-reinforcing module comprises:
If repair data line signal is the positive polarity reverse signal, then the first operational amplifier output cathode is strengthened signal in advance;
If repair data line signal is the positive polarity holding signal, the normal output cathode repair signal of second operational amplifier then;
If repair data line signal is the negative polarity reverse signal, then the 3rd operational amplifier output negative pole is strengthened signal in advance;
If repair data line signal is the negative polarity holding signal, the normal output negative pole repair signal of four-operational amplifier then.
3. the driving method of the pre-reinforcing module of liquid crystal indicator as claimed in claim 2 is characterized in that, described positive polarity is strengthened voltage of signals in advance and is higher than the positive polarity target voltage, and described negative polarity is strengthened signal in advance and is lower than the negative polarity target voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008102024452A CN101388199B (en) | 2008-11-07 | 2008-11-07 | Pre-reinforcing module for liquid crystal display and drive method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102024452A CN101388199B (en) | 2008-11-07 | 2008-11-07 | Pre-reinforcing module for liquid crystal display and drive method thereof |
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| CN101388199A CN101388199A (en) | 2009-03-18 |
| CN101388199B true CN101388199B (en) | 2010-06-02 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102024438B (en) * | 2010-12-24 | 2012-10-17 | 北京京东方光电科技有限公司 | Liquid crystal display source driving device and driving method |
| CN105632429A (en) * | 2014-11-28 | 2016-06-01 | 十速兴业科技（深圳）有限公司 | Voltage follower and driving device |
| US9626925B2 (en) * | 2015-03-26 | 2017-04-18 | Novatek Microelectronics Corp. | Source driver apparatus having a delay control circuit and operating method thereof |
| CN114360438B (en) | 2020-09-30 | 2022-12-16 | 荣耀终端有限公司 | Display device, driving chip and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003131611A (en) * | 2001-07-31 | 2003-05-09 | Canon Inc | Scanning circuit and image display device |
| JP2005253181A (en) * | 2004-03-03 | 2005-09-15 | Seiko Epson Corp | Voltage supply circuit, voltage supply method, power supply circuit, electro-optical device, and electronic apparatus |
| CN1797141A (en) * | 2004-12-20 | 2006-07-05 | 凌阳科技股份有限公司 | Thin film transistor liquid crystal display with disconnection function and high impedance detection circuit |
| CN201289555Y (en) * | 2008-11-07 | 2009-08-12 | 上海广电光电子有限公司 | Pre-reinforcing module of liquid crystal display device |
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- 2008-11-07 CN CN2008102024452A patent/CN101388199B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003131611A (en) * | 2001-07-31 | 2003-05-09 | Canon Inc | Scanning circuit and image display device |
| JP2005253181A (en) * | 2004-03-03 | 2005-09-15 | Seiko Epson Corp | Voltage supply circuit, voltage supply method, power supply circuit, electro-optical device, and electronic apparatus |
| CN1797141A (en) * | 2004-12-20 | 2006-07-05 | 凌阳科技股份有限公司 | Thin film transistor liquid crystal display with disconnection function and high impedance detection circuit |
| CN201289555Y (en) * | 2008-11-07 | 2009-08-12 | 上海广电光电子有限公司 | Pre-reinforcing module of liquid crystal display device |
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| CN101388199A (en) | 2009-03-18 |
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Owner name: NANJING CEC PANDA LCD TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SVA (GROUP) CO., LTD. Effective date: 20110704 |
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