CN1224250C - Apparatus and method for defective pixel remediation of liquid crystal panel - Google Patents
Apparatus and method for defective pixel remediation of liquid crystal panel Download PDFInfo
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- CN1224250C CN1224250C CN 02132052 CN02132052A CN1224250C CN 1224250 C CN1224250 C CN 1224250C CN 02132052 CN02132052 CN 02132052 CN 02132052 A CN02132052 A CN 02132052A CN 1224250 C CN1224250 C CN 1224250C
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Abstract
The present invention discloses a remedy method for a defect pixel on an LCD panel and a device thereof. The method at least comprises the following steps: firstly, an LCD panel is checked so as to obtain the position of a defect pixel on the LCD panel; then, a pixel signal is input, wherein the pixel signal comprises a pixel brightness signal which causes one pixel to have first brightness according to the pixel signal; if the pixel signal is used for being input to the defect pixel, the pixel brightness signal is replaced by a preset brightness signal which causes the pixel to have second brightness, wherein the second brightness is less than the first brightness, such as full dark; finally, the pixel signal is output.
Description
Technical field
The present invention relates to a kind of pixel driving device and driving method thereof of liquid crystal panel, and particularly relevant for a kind of defective pixel remediation device and means to save the situation thereof of liquid crystal panel.
Background technology
The development of imaging technique is maked rapid progress, and (Liquid Crystal Display LCD) has low radiation, low power consumption and compact advantage to LCD, becomes the main product of display in recent years gradually.
Liquid crystal panel is made up of a plurality of pixels of arranging with matrix form.Control the brightness of pixel by the pixel data of each pixel of feed-in respectively, make whole liquid crystal panel display frame.
If because all errors of panel manufacturing process, for example: the first metal layer is with the second metal level short circuit, or coats coming off of photoresist on the glass substrate ... or the like, and the defective that causes pixel to construct.So, have this pixel and can't show that the situation of corresponding brightness takes place according to its received pixel data.For example: because coming off of photoresist will make the shown brightness meeting of its corresponding pixel much larger than its neighbor, thereby form a fleck defect.For convenience, in this manual, pixel is constructed the tool defective pixels be called defect pixel, and will always show that the pixel of brightness is called bright spot greatly because of photoresist comes off.If have bright spot on the liquid crystal panel, can cause the image display quality of liquid crystal panel to seriously influence, also can reduce the wish that the consumer buys.
The mode that solves at present the bright spot problem of liquid crystal panel is with machine or directly comes off with the defect sturcture or the photoresist of the mode correction of the defect pixel of craft.Because the volume of each pixel is all very little, structure is also very complicated, want to check the position of the fault of construction of finding out defect pixel, and repair at this defect sturcture, not only very difficult, the cost of time, money and manpower is also very high, even the defective on the certain structures can't be repaired.Therefore, how reducing the influence that image display quality caused of defect pixel to liquid crystal panel, is crucial problem.
Summary of the invention
Technical problem to be solved by this invention is, what a kind of liquid crystal panel defect pixel was provided remedies device and means to save the situation, mode with the cost less expensive of simple and time, money and manpower, solve the bright spot problem that defect pixel is caused on liquid crystal panel, and reduce the influence that image display quality caused of defect pixel liquid crystal panel.
To achieve these goals, the invention provides a kind of device of remedying of liquid crystal panel defect pixel, this device replaces the unit by defect pixel signal storage element, picture element signal storage element, position comparing unit and picture element signal at least and is formed.Defect pixel signal storage element is in order to output defect pixel signal, and the defect pixel signal is in order to the position of expression defect pixel at liquid crystal panel.The picture element signal storage element is in order to the output pixel signal.Picture element signal comprises the pixel intensity signal, with so that this picture element signal of a pixel basis and have one first brightness, and the location of pixels signal, in order to represent the position of this pixel on liquid crystal panel.Whether the position comparing unit couples with defect pixel signal storage element and picture element signal storage element respectively, in order to compare defect pixel signal and location of pixels signal, be in order to input to this defect pixel to determine this picture element signal.Picture element signal replaces the unit and the position comparing unit couples, and when this picture element signal is when inputing to this defect pixel, then the pixel intensity signal in this picture element signal is substituted by the dim spot luminance signal, and this dim spot luminance signal is with so that this pixel is a dim spot.
The present invention also proposes a kind of means to save the situation of liquid crystal panel defect pixel, and this method may further comprise the steps at least: at first, check liquid crystal panel, learn the position of defect pixel on liquid crystal panel.Then, the input picture element signal, wherein, picture element signal also comprises the pixel intensity signal, with so that a pixel basis picture element signal has first brightness; This picture element signal also comprise one with the corresponding location of pixels signal of this pixel, in order to represent the position of this pixel on liquid crystal panel; If comparing definite this picture element signal by the position to this locations of pixels and this defect pixel is in order to input to this defect pixel, then the pixel intensity signal in this picture element signal is substituted by the dim spot luminance signal, this dim spot luminance signal is with so that this pixel is a dim spot.The brightness of described dim spot is for example: complete dark.At last, export this picture element signal that this pixel intensity signal has been substituted by the dim spot luminance signal.
The invention has the beneficial effects as follows that the means to save the situation of liquid crystal panel defect pixel of the present invention by the pixel intensity signal of control input defect pixel, makes that the brightness of defect pixel is permanent in complete dark.So, then can be simple and the mode of the cost less expensive of time, money and manpower, solve the problem of the bright spot that defect pixel causes, also can improve the image display quality of liquid crystal panel.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the circuit block diagram according to the defective pixel remediation device of the liquid crystal panel of embodiment drafting proposed by the invention;
Fig. 2 is the flow chart of the defective pixel remediation method of the liquid crystal panel that illustrates according to embodiment proposed by the invention;
Fig. 3 A, Fig. 3 B represent the schematic diagram put in faceplate with represent pixel according to enabling signal, clock signal, horizontal-drive signal and vertical synchronizing signal respectively.
Embodiment
Technical characterstic of the present invention is, will be substituted by default dim spot pixel data in order to the picture element signal that inputs to this defect pixel, makes liquid crystal panel when display frame, and the brightness of defect pixel perseverance is complete dark.So, but the problem of the bright spot that caused of fix the defect pixel then improves the image display quality of liquid crystal panel.
Fig. 1 is the calcspar of remedying device of a kind of liquid crystal panel defect pixel of foundation embodiment drafting proposed by the invention.Defective pixel remediation device 100 is to repair unit 104 by defect pixel set of signals storage element 102 and picture element signal to be constituted, wherein, picture element signal repairing unit 104 comprises that also picture element signal storage element 106, defect pixel signal storage element 108, position comparing unit 110 and picture element signal replace unit 112.Wherein, position comparing unit 110 couples with defect pixel signal storage element 108 and picture element signal storage element 106 respectively, and picture element signal replaces unit 112 and position comparing unit 110 couples, as shown in Figure 1.Be noted that defective pixel remediation device 100 can be a circuit arrangement independently, also can partly or all be arranged in other existing circuit arrangements.For example: defective pixel remediation device 100 can wholely be arranged in graduator (scaler) or other the existing circuit arrangements, or only picture element signal is repaired unit 104, perhaps the part of picture element signal repairing unit 104 is arranged in graduator or other the existing circuit arrangements.
Fig. 2 is the flow chart of the means to save the situation of a kind of liquid crystal panel defect pixel of representing according to embodiment proposed by the invention.At first, execution in step 202 is checked liquid crystal panel, learns the position of each defect pixel on liquid crystal panel on the liquid crystal panel.Then, execution in step 204 with the position of each defect pixel on liquid crystal panel, with the form of defect pixel set of signals, is stored in the defect pixel set of signals storage element 102.In the present embodiment, each defect pixel signal is represented the position of each defect pixel on liquid crystal panel with the form of coordinate.All defect pixel signal sets are got up just to form a defect pixel set of signals, and be stored in the defect pixel set of signals storage element 102.Wherein, defect pixel set of signals storage element 102 can be a microcontroller (micro controller) or an integrated circuit (IC).
Then, execution in step 206 inputs to the defect pixel signal in the defect pixel signal storage element 108 respectively, and general picture element signal is inputed in the picture element signal storage element 106.Wherein, general picture element signal comprises the pixel intensity signal, uses so that receive this pixel intensity signal display brightness of pixel basis of this picture element signal.In color liquid crystal panel, pixel is divided into three kinds, respectively in order to show redness (R), green (G) and blue (B), so the pixel intensity signal also has redness (R), green (G) and blue (B) three kinds.In addition, general picture element signal also comprises the location of pixels signal, in order to represent the position of pixel on liquid crystal panel of this picture element signal desire input.The location of pixels signal comprises horizontal-drive signal Hs, vertical synchronizing signal Vs, clock signal clk and enabling signal En.Fig. 3 A, Fig. 3 B represent the schematic diagram with the position of represent pixel on panel according to enabling signal En, clock signal clk, horizontal-drive signal Hs and vertical synchronizing signal Vs respectively.Please refer to Fig. 3 A, can the horizontal level of remarked pixel on liquid crystal panel according to enabling signal En, clock signal clk and horizontal-drive signal Hs.As Fig. 3 B, can the upright position of remarked pixel on liquid crystal panel according to enabling signal En, horizontal-drive signal Hs and vertical synchronizing signal Vs.For example: the pixel that is arranged in the 2nd row the 3rd row on the liquid crystal panel can be denoted as among the clock signal clk and Fig. 3 B of " 2 " with Fig. 3 A, and the horizontal-drive signal Hs that is denoted as " 3 " represents.
Next, execution in step 208, picture element signal storage element 106 and defect pixel signal storage element 108 are exported general picture element signal and defect pixel signal respectively to position comparing unit 110.Position comparing unit 110 can be learnt the position of defect pixel according to the defect pixel signal, and according to the location of pixels signal of general picture element signal, can learn the locations of pixels of this general picture element signal institute in order to import.
Afterwards, execution in step 210.After position comparing unit 110 more general pixel informations and defect pixel data, learn that this general picture element signal is in order to inputing in the defect pixel, then execution in step 212, and the pixel intensity signal of this general picture element signal is substituted by the dim spot luminance signal.Wherein, the signal value of dim spot luminance signal is to use so that pixel shows complete dark.When liquid crystal panel was the display panels of vertical alignment, then the dim spot luminance signal was a low voltage signal.When liquid crystal face very during the display panels of twisted nematic mode, then this dim spot luminance signal is a high voltage signal.In this manual, the pixel intensity signal picture element signal that is substituted by the dim spot luminance signal is called the dim spot picture element signal.
At last, execution in step 214 is exported this picture element signal.So, then finish the method for repairing and mending of defect pixel proposed by the invention.
The means to save the situation of the disclosed liquid crystal panel defect pixel of the above embodiment of the present invention by the pixel intensity signal of control input defect pixel, makes that the brightness of defect pixel is permanent in complete dark.So, then can be simple and the mode of the cost less expensive of time, money and manpower, solve the problem of the bright spot that defect pixel causes, also can improve the image display quality of liquid crystal panel.
In sum, though the present invention discloses as above with a preferred embodiment, be not in order to limit the present invention, those skilled in the art, without departing from the spirit and scope of the present invention, the equivalent transformation of being made all is included in the claim of the present invention.
Claims (12)
1. the means to save the situation of a liquid crystal panel defect pixel is characterized in that, this method may further comprise the steps at least:
Check this liquid crystal panel, learn the position of this defect pixel on this liquid crystal panel;
Import a picture element signal, wherein, this picture element signal comprises a pixel intensity signal, with so that this picture element signal of a pixel basis has one first brightness; This picture element signal also comprise one with the corresponding location of pixels signal of this pixel, in order to represent the position of this pixel on liquid crystal panel;
If comparing definite this picture element signal by the position to this locations of pixels and this defect pixel is in order to input to this defect pixel, then this pixel intensity signal is substituted by a dim spot luminance signal, wherein, this dim spot luminance signal is with so that this pixel is a dim spot; And
Export this picture element signal that this pixel intensity signal has been substituted by this dim spot luminance signal.
2. the means to save the situation of liquid crystal panel defect pixel as claimed in claim 1 is characterized in that, the brightness of described dim spot is complete dark.
3. the means to save the situation of liquid crystal panel defect pixel as claimed in claim 2 is characterized in that, when this panel was the display panels of vertical alignment, this dim spot luminance signal was a low voltage signal.
4. the means to save the situation of liquid crystal panel defect pixel as claimed in claim 2 is characterized in that, when this panel was the display panels of twisted nematic mode, this dim spot luminance signal was a high voltage signal.
5. the means to save the situation of liquid crystal panel defect pixel as claimed in claim 1 is characterized in that, described location of pixels signal comprises a horizontal-drive signal, a vertical synchronizing signal, a clock signal and an enabling signal.
A liquid crystal panel defect pixel remedy device, it is characterized in that, comprise at least:
One defect pixel signal storage element, in order to export a defect pixel signal, wherein, this defect pixel signal is in order to represent the position of this defect pixel at this liquid crystal panel;
One picture element signal storage element is in order to export a picture element signal, wherein, this picture element signal comprises a pixel intensity signal, with so that this picture element signal of a pixel basis has one first brightness, reach a location of pixels signal, in order to represent the position of this pixel on this liquid crystal panel;
One position comparing unit couples with this defect pixel signal storage element and this picture element signal storage element respectively, in order to relatively this defect pixel signal and this location of pixels signal, whether inputs to this defect pixel to determine this picture element signal;
One picture element signal replaces the unit, couples with this position comparing unit, and when this picture element signal is in order to inputing to this defect pixel, then this pixel intensity signal to be substituted by a dim spot luminance signal, wherein, this dim spot luminance signal is with so that this pixel is a dim spot.
7. liquid crystal panel defect pixel as claimed in claim 6 remedy device, it is characterized in that the brightness of described dim spot is complete dark.
8. liquid crystal panel defect pixel as claimed in claim 6 remedy device, it is characterized in that when this liquid crystal panel was the display panels of vertical alignment, this dim spot luminance signal was a low voltage signal.
9. liquid crystal panel defect pixel as claimed in claim 6 remedy device, it is characterized in that when this liquid crystal panel was the display panels of twisted nematic mode, this dim spot luminance signal was a high voltage signal.
10. liquid crystal panel defect pixel as claimed in claim 6 remedy device, it is characterized in that described location of pixels signal comprises a horizontal-drive signal, a vertical synchronizing signal, a clock signal and an enabling signal.
11. liquid crystal panel defect pixel as claimed in claim 6 remedy device, it is characterized in that this liquid crystal panel defective pixel remediation device is arranged in the graduator.
12. liquid crystal panel defect pixel as claimed in claim 6 remedy device, it is characterized in that the portion of element of described liquid crystal panel defective pixel remediation device is arranged in the graduator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02132052 CN1224250C (en) | 2002-09-09 | 2002-09-09 | Apparatus and method for defective pixel remediation of liquid crystal panel |
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|---|---|---|---|
| CN 02132052 CN1224250C (en) | 2002-09-09 | 2002-09-09 | Apparatus and method for defective pixel remediation of liquid crystal panel |
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| CN1482797A CN1482797A (en) | 2004-03-17 |
| CN1224250C true CN1224250C (en) | 2005-10-19 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8044944B2 (en) * | 2005-07-22 | 2011-10-25 | Nvidia Corporation | Defective pixel management for flat panel displays |
| KR101182307B1 (en) * | 2005-12-07 | 2012-09-20 | 엘지디스플레이 주식회사 | Flat Display Panel, Picture Quality Controlling Apparatus thereof and Picture Quality Controlling Method thereof |
| KR102222901B1 (en) | 2014-07-07 | 2021-03-04 | 엘지디스플레이 주식회사 | Method of driving an organic light emitting display device |
| CN104363391B (en) * | 2014-11-28 | 2018-11-27 | 广东欧珀移动通信有限公司 | Dead pixel points of images compensation method, system and photographing device |
| CN104992657B (en) * | 2015-07-27 | 2017-09-22 | 京东方科技集团股份有限公司 | Mura compensating modules and method, display device and method |
| CN117079586B (en) * | 2023-10-12 | 2024-01-05 | 长春希达电子技术有限公司 | Real pixel display screen blind spot repairing device, method, control system and electronic equipment |
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