CN100530331C - Liquid crystal panel driving device and its driving method - Google Patents
Liquid crystal panel driving device and its driving method Download PDFInfo
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- CN100530331C CN100530331C CNB200610060620XA CN200610060620A CN100530331C CN 100530331 C CN100530331 C CN 100530331C CN B200610060620X A CNB200610060620X A CN B200610060620XA CN 200610060620 A CN200610060620 A CN 200610060620A CN 100530331 C CN100530331 C CN 100530331C
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Abstract
The invention is a LCD panel driver, comprising a drive IC, where the drive IC comprises: a video memory to record the previous image frame displayed by LCD, a comparer, a reverser, a two-way switch and a counter, where the two-way switch comprises a first output end and a second output end, the first output end directly outputs image, and the second output end is connected to the reverser; the counter is used to determine whether the input image is a static image; the reverser reverses the current image frame and outputs an irregular image; the comparer compares the current image frame with the previous image frame and has two output channels, one directly outputting an image through the first output end and the other outputting an irregular image in turn through the counter, the second output end and the reverser. And its circuit structure is simpler and able to be used to eliminate the residual image existing on the LCD panel.
Description
Technical field
The present invention relates to a kind of liquid crystal panel drive and driving method thereof.
Background technology
In recent years, (Liquid Crystal Display LCD) has progressively replaced traditional cathode-ray tube (CRT) (Cathode Ray Tube, CRT) display to LCD.Though LCD has high brightness, lightening characteristics,, ghost phenomena remains the technical bottleneck that field of liquid crystal display exists.
At present, in order to solve the ghost problem of LCD, industry utilization insertion one picture between display frame usually solves the ghost problem.Fig. 1 is a kind of structural representation of prior art liquid crystal panel drive.This liquid crystal panel drive 10 comprises an image input media 11, an image output device 13, an interpolation device 15 and a drive integrated circult (Drive Integrated Circuit) 17.This image input media 11 is gathered the view data of sending from external circuit and is sent to this drive integrated circult 17.The view data of these image input media 11 inputs of these drive integrated circult 17 analyzing and processing.This interpolation device 15 is generally an image and produces chip, can independently produce and export a view data to this image output device 13.
This drive integrated circult 17 comprises a shadow memory 171, a comparer 172 and a counter 173.This shadow memory 171 is a memory circuit, the previous frame view data that this liquid crystal panel of its stored record shows.Whether this comparer 172 is used for relatively the view data that view data and this shadow memory 171 of this image input media 11 inputs store identical.This counter 173 default critical values and initial values, it is driven by this comparer 172 and moves, and can produce a trigger pip and drive this interpolation device 15.
When this image input media 11 transmits a frame image data to this comparer 172, whether this comparer 172 can compare this frame image data and the previous frame view data that is stored in this shadow memory 171 earlier, be a still image to determine this frame image data.If two image differences are then directly exported this frame image data to this image output device 13; If two images are identical, then comparer 172 sends a trigger pip and triggers this counter 173 and begin counting, thereby initial value is increased.When initial value increases to critical value, this counter 173 sends a trigger pip and drives this interpolation device 15, make this interpolation device 15 produce an interpolated frame and be sent to this image output device 13, thereby the long-time still image that shows of forced fluid crystal panel changes, and reaches the purpose of eliminating ghost.
But, because being generally an image, this interpolation device 15 produces chip, its circuit structure complexity and volume are bigger, thereby make the circuit structure of this liquid crystal panel drive 10 complicated.
Summary of the invention
In order to solve prior art liquid crystal panel drive circuit structure, be necessary to provide a kind of circuit structure better simply liquid crystal panel drive than complicated problems.
In addition, also be necessary to provide a kind of driving method of above-mentioned liquid crystal panel drive.
A kind of liquid crystal panel drive, it comprises a drive integrated circult.This drive integrated circult comprises the previous frame view data that this shadow memory record liquid crystal panel of a shadow memory, a comparer, a reverser, a two-way switch and a counter shows.This two-way switch comprises one first output terminal and one second output terminal, the direct output image data of this first output terminal, and second output terminal is connected to this reverser.This counter is used for judging whether the view data of input is a still image.This reverser and is exported irregular image data with the current frame image data reversal of input.The previous frame view data of current frame image data that this comparer is relatively imported and the storage of this shadow memory, it has two output channels, one output channel is by the direct output image data of first output terminal of this two-way switch, another output channel by second output terminal and this reverser of this counter, this two-way switch, is exported irregular image data in regular turn.
A kind of driving method of liquid crystal panel drive, it may further comprise the steps: a shadow memory, a comparer, a counter, a two-way switch and a reverser are provided; Store a frame image data to this shadow memory; The view data of utilizing this comparer to receive a new input also relatively is somebody's turn to do the view data of new input and the view data of this shadow memory storage; Control the conducting direction of this two-way switch according to the comparative result of comparer, if i.e. two frame image data differences, then comparer triggers an end of the direct output image data of this two-way switch conducting, thus the direct view data of the new input of output; If two frame image datas are identical, then comparer flip-flop number counting drives this reverser one end of this two-way switch conducting when counting up to certain value, the view data of the new input of this reverser counter-rotating, and export an irregular image.
This liquid crystal panel drive utilizes a two-way switch and a reverser to realize inserting a view data to liquid crystal panel, thereby forces the long-time still image that shows to change, and reaches the purpose of eliminating ghost.The circuit structure of this two-way switch and reverser is simple, can be set directly on the drive integrated circult, thereby simplify the circuit structure of this liquid crystal display drive unit.
Description of drawings
Fig. 1 is a kind of structural representation of prior art liquid crystal panel drive.
Fig. 2 is the structural representation of liquid crystal panel drive one better embodiment of the present invention.
Embodiment
Fig. 2 is the structural representation of liquid crystal panel drive one better embodiment of the present invention.This liquid crystal panel drive 20 comprises an image input media 21, an image output device 23 and a drive integrated circult 25.This image input media 21 is gathered the view data that produces from external circuit and is sent to this drive integrated circult 25.These drive integrated circult 25 processing and transmitted image data are to this image output device 23.
This drive integrated circult 25 comprises a shadow memory 251, a comparer 253, a counter 255, one two-way switch 257 and a reverser 259.This shadow memory 251 is a memory circuit, the previous frame view data that this liquid crystal panel of its stored record shows.Whether this comparer 253 is used for relatively the view data that view data and this shadow memory 251 of this image input media 21 inputs store identical.This counter 255 default an initial value a, one first critical value b and one second critical value c, wherein c is less than b.This counter 255 drives operation by this comparer 253, and can produce trigger pip and drive this two-way switch 257.This two-way switch 257 comprises one first output terminal 2571 and one second output terminal 2572, and this first output terminal 2571 is connected to image output device 23, and this second output terminal 2572 is connected to this reverser 259.This reverser 259 can export the view data counter-rotating of input to this image output device 23.
When this image input media 21 transmits a frame image data, be designated as the n two field picture, during to this comparer 253, this comparer 253 reads the former frame view data of these shadow memory 251 storages, be designated as the n-1 two field picture, and compare n two field picture and n-1 two field picture, whether be a tableaux to determine the n two field picture.
If two frame image data differences, then comparer 253 triggers first output terminal, 2571 conductings of these two-way switchs 257, and then this image output device 23 is directly exported the n frame image data, and reads in n two field picture to this shadow memory 251 and store; If two frame image datas are identical, then comparer 253 send a trigger pip drive this counter 255 begin the counting, make the initial value a of this counter 255 add 1.Then, this image input media 21 continues to transmit the n+1 two field picture to this comparer 253, and comparer 253 is n+1 two field picture and n-1 two field picture relatively.If two frame image data differences, then comparer 253 triggers first output terminal, 2571 conductings of this two-way switch 257, then this image output device 23 is directly exported the n+1 frame image data, and reads in n+1 two field picture to this shadow memory 251 and store, and makes counter 255 zero clearings simultaneously; If two frame image datas are identical, then comparer 253 sends a trigger pip again and drives this counter 255, makes the count value of counter 255 add 1 again.
The above action of repetitive cycling, increase to the first critical value b until the initial value a of this counter 255, be that the liquid crystal panel display image is a still image, then this counter 255 sends second output terminal, 2572 conductings that one first trigger pip drives this two-way switch 257, then the last frame view data of 259 pairs of these image input medias of this reverser, 21 inputs is reversed, obtain an irregular image, again this irregular image is sent to this image output device 23, thereby the long-time still image that shows of forced fluid crystal panel changes.
When this counter 255 sent first trigger pip, the count value of this counter 255 was cleared, and beginning is counting again.When counting makes that initial value a increases to this second critical value c, this counter 255 sends one second trigger pip makes this two-way switch 257 transfer 2571 conductings of first output terminal to by 2572 conductings of second output terminal, thus the normal picture that the display image redirect of liquid crystal panel is fed back into.
This liquid crystal panel drive 20 utilizes a two-way switch 257 and a reverser 259 to realize inserting a view data to this image output device 23, thereby forces the long-time still image that shows to change, and reaches the purpose of eliminating ghost.This two-way switch 257 is simple with the circuit structure of reverser 259, can be set directly on the drive integrated circult 25, thereby simplify the circuit structure of this liquid crystal display drive unit 20.
Claims (10)
1. liquid crystal panel drive, it comprises a drive integrated circult, this drive integrated circult comprises:
One shadow memory, the previous frame view data that its record liquid crystal panel shows;
One comparer, the previous frame view data of current frame image data that it is relatively imported and the storage of this shadow memory;
One counter, it is used for judging whether the view data of input is a still image;
It is characterized in that: this drive integrated circult further comprises:
One reverser, it can and export irregular image data with the current frame image data reversal of input;
One two-way switch, it comprises one first output terminal and one second output terminal, the direct output image data of this first output terminal, this second output terminal is connected to this reverser;
Wherein, this comparer has two output channels, one output channel is by the direct output image data of first output terminal of this two-way switch, and another output channel by second output terminal and this reverser of this counter, this two-way switch, is exported irregular image data in regular turn.
2. liquid crystal panel drive as claimed in claim 1, it is characterized in that: this liquid crystal panel drive further comprises an image input media and an image output device, this image input media is used for gathering the view data of sending from external circuit and is sent to this drive integrated circult, and this image output device is used for receiving each view data of this drive integrated circult output and exporting liquid crystal panel to.
3. liquid crystal panel drive as claimed in claim 1 is characterized in that: this shadow memory is a memory circuit.
4. liquid crystal panel drive as claimed in claim 1 is characterized in that: this counter has one first critical value and one second critical value, and this second critical value is less than this first critical value.
5. liquid crystal panel drive as claimed in claim 4, it is characterized in that: this first critical value is used for judging whether the view data of input is a still image, when this rolling counters forward reaches this first critical value, this counter will trigger its second output terminal of this two-way switch conducting.
6. liquid crystal panel drive as claimed in claim 4, it is characterized in that: this second critical value is used for limiting the demonstration time of the irregular image data that this reverser exports, when this rolling counters forward reaches the New count of laying equal stress on after this first critical value zero clearing and reaches this second critical value, this counter will trigger this two-way switch and turn to its first output terminal of conducting from its second output terminal of conducting.
7. the driving method of a liquid crystal panel drive, it may further comprise the steps:
One shadow memory, a comparer, a counter, a two-way switch and a reverser are provided;
Store a frame image data to this shadow memory;
The view data of utilizing this comparer to receive a new input also relatively is somebody's turn to do the view data of new input and the view data of this shadow memory storage;
Control the conducting direction of this two-way switch according to the comparative result of comparer, if i.e. two frame image data differences, then comparer triggers an end of the direct output image data of this two-way switch conducting, thus the direct view data of the new input of output; If two frame image datas are identical, then comparer flip-flop number counting drives this reverser one end of this two-way switch conducting when counting up to certain value, the view data of the new input of this reverser counter-rotating, and export an irregular image.
8. the driving method of liquid crystal panel drive as claimed in claim 7 is characterized in that: default one first critical value of this counter and one second critical value, and this first critical value is greater than this second critical value.
9. the driving method of liquid crystal panel drive as claimed in claim 8, it is characterized in that: when the comparative result of comparer is identical when making the count value of this counter reach first critical value, this counter sends one first signal and makes this two-way switch conducting reverser one end.
10. the driving method of liquid crystal panel drive as claimed in claim 9, it is characterized in that: after this counter sends first signal, this counter will be cleared beginning and count again, when count value reached second critical value, this counter sends a secondary signal made this two-way switch be transferred to an end of direct output image data by an end of conducting reverser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610060620XA CN100530331C (en) | 2006-05-12 | 2006-05-12 | Liquid crystal panel driving device and its driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610060620XA CN100530331C (en) | 2006-05-12 | 2006-05-12 | Liquid crystal panel driving device and its driving method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101071543A CN101071543A (en) | 2007-11-14 |
| CN100530331C true CN100530331C (en) | 2009-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB200610060620XA Expired - Fee Related CN100530331C (en) | 2006-05-12 | 2006-05-12 | Liquid crystal panel driving device and its driving method |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101393627B1 (en) * | 2007-03-02 | 2014-05-12 | 삼성디스플레이 주식회사 | Display device and control method of the same |
| CN101739021B (en) * | 2008-11-14 | 2013-04-17 | 北京谊安医疗系统股份有限公司 | Equipment self-inspection control device |
| CN101989418B (en) * | 2009-07-31 | 2014-07-02 | 联咏科技股份有限公司 | Picture turning method and system |
| CN101996590A (en) * | 2009-08-21 | 2011-03-30 | 北京京东方光电科技有限公司 | Driving circuit and driving method of liquid crystal display |
| CN103531153B (en) * | 2012-07-03 | 2015-09-30 | 冠捷投资有限公司 | The control method of display screen |
| CN102903348B (en) * | 2012-09-25 | 2015-02-04 | 苏州佳世达光电有限公司 | Display device with static image judging function and judging method of device |
| CN103247249B (en) * | 2013-04-27 | 2015-09-02 | 京东方科技集团股份有限公司 | Display control circuit, display control method and display device |
| CN103369273A (en) * | 2013-06-25 | 2013-10-23 | 四川虹欧显示器件有限公司 | Plasma television residual image protective method |
| JP7155697B2 (en) * | 2018-07-18 | 2022-10-19 | セイコーエプソン株式会社 | DISPLAY DEVICE AND CONTROL METHOD OF DISPLAY DEVICE |
| CN109147694B (en) * | 2018-09-03 | 2021-09-10 | 明基智能科技（上海）有限公司 | Method for preventing picture ghost and display system |
| CN109803100A (en) * | 2019-01-25 | 2019-05-24 | 冠捷显示科技（厦门）有限公司 | A kind of ghost method that adaptively disappears |
| CN114077470B (en) * | 2020-08-21 | 2023-10-10 | 广州视源电子科技股份有限公司 | Liquid crystal display control method, device, equipment and storage medium |
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- 2006-05-12 CN CNB200610060620XA patent/CN100530331C/en not_active Expired - Fee Related
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| CN101071543A (en) | 2007-11-14 |
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Granted publication date: 20090819 Termination date: 20170512 |