CN1482797A - 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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- CN1482797A CN1482797A CNA021320527A CN02132052A CN1482797A CN 1482797 A CN1482797 A CN 1482797A CN A021320527 A CNA021320527 A CN A021320527A CN 02132052 A CN02132052 A CN 02132052A CN 1482797 A CN1482797 A CN 1482797A
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Abstract
The invention discloses a method and apparatus for the remedy of liquid crystal faceplate blemish pixels, the method comprises at least, first, inspecting the liquid crystal faceplate, obtaining the position of the defective pixels on the crystal faceplate, then inputting the pixel signal which contains pixel brightness signal to make one pixel have a first brightness according to the pixel signal, if the pixel signal is used to input to the defective pixel, then replace the pixel brightness signal with a preset brightness signal, to make the pixel have a second brightness, wherein the second brightness is less than the first brightness, e.g. all dark, finally, exporting the pixel signal.
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 Cfystal 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, 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 default luminance signal, and should default luminance signal is with so that pixel has one second brightness.
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.If this picture element signal is in order to inputing to this defect pixel, then the pixel intensity signal in this picture element signal to be substituted by default luminance signal, this default luminance signal is with so that pixel has second brightness.Wherein, second brightness is less than first brightness, for example: complete dark.At last, output pixel 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 respectively according to enabling signal (En), clock signal (clk), horizontal-drive signal (Hs) and vertical synchronizing signal (Vs) schematic diagram with the position of represent pixel on panel.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 in 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 " is represented.
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 VA pattern, then the dim spot luminance signal was a low voltage signal.When liquid crystal face very during the display panels of TN pattern, 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 (14)
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;
If this picture element signal is in order to inputing to this defect pixel, then this pixel intensity signal is substituted by a default luminance signal, wherein, this default luminance signal is with so that this pixel has one second brightness; And
Export this picture element signal.
2. the means to save the situation of liquid crystal panel defect pixel as claimed in claim 1 is characterized in that, described second brightness 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 VA pattern, this default 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 TN pattern, this default 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 picture element signal comprises a location of pixels signal, and this location of pixels signal is corresponding with this pixel.
6. the means to save the situation of liquid crystal panel defect pixel as claimed in claim 5 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.
7. the means to save the situation of liquid crystal panel defect pixel as claimed in claim 5 is characterized in that, learns that according to this picture element signal position signalling whether this picture element signal is in order to input to this defect pixel.
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, couple with this position comparing unit, when this picture element signal is in order to input to this defect pixel, then this pixel intensity signal to be substituted by a default luminance signal, wherein, this default luminance signal is with so that this pixel has one second brightness.
9. liquid crystal panel defect pixel as claimed in claim 8 remedy device, it is characterized in that described second brightness is complete dark.
10. liquid crystal panel defect pixel as claimed in claim 8 remedy device, it is characterized in that when this liquid crystal panel was the display panels of VA pattern, this default luminance signal was a low voltage signal.
11. liquid crystal panel defect pixel as claimed in claim 8 remedy device, it is characterized in that when this liquid crystal panel was the display panels of TN pattern, this default luminance signal was a high voltage signal.
12. liquid crystal panel defect pixel as claimed in claim 8 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.
13. liquid crystal panel defect pixel as claimed in claim 8 remedy device, it is characterized in that this liquid crystal panel defective pixel remediation device is arranged in the graduator.
14. liquid crystal panel defect pixel as claimed in claim 8 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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| 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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| Publication Number | Publication Date |
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| CN1482797A true CN1482797A (en) | 2004-03-17 |
| CN1224250C CN1224250C (en) | 2005-10-19 |
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| CN 02132052 Expired - Fee Related CN1224250C (en) | 2002-09-09 | 2002-09-09 | Apparatus and method for defective pixel remediation of liquid crystal panel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1979603B (en) * | 2005-12-07 | 2010-05-12 | 乐金显示有限公司 | Flat display panel, picture quality controlling apparatus and method thereof |
| CN1901025B (en) * | 2005-07-22 | 2011-08-10 | 辉达公司 | Defective pixel management for flat panel displays |
| CN104363391A (en) * | 2014-11-28 | 2015-02-18 | 广东欧珀移动通信有限公司 | Image defective pixel compensation method and system and photographing device |
| CN105321461A (en) * | 2014-07-07 | 2016-02-10 | 乐金显示有限公司 | Method of driving organic light emitting display apparatus |
| WO2017016322A1 (en) * | 2015-07-27 | 2017-02-02 | Boe Technology Group Co., Ltd. | Controller for compensating mura defects, display apparatus having the same, and method for compensating mura defects |
| CN117079586A (en) * | 2023-10-12 | 2023-11-17 | 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 |
-
2002
- 2002-09-09 CN CN 02132052 patent/CN1224250C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1901025B (en) * | 2005-07-22 | 2011-08-10 | 辉达公司 | Defective pixel management for flat panel displays |
| CN1979603B (en) * | 2005-12-07 | 2010-05-12 | 乐金显示有限公司 | Flat display panel, picture quality controlling apparatus and method thereof |
| CN105321461A (en) * | 2014-07-07 | 2016-02-10 | 乐金显示有限公司 | Method of driving organic light emitting display apparatus |
| US9754538B2 (en) | 2014-07-07 | 2017-09-05 | Lg Display Co., Ltd. | Method of driving organic light emitting display apparatus with a defective pixel |
| CN105321461B (en) * | 2014-07-07 | 2018-07-24 | 乐金显示有限公司 | The method for driving organic light-emitting display device |
| CN104363391A (en) * | 2014-11-28 | 2015-02-18 | 广东欧珀移动通信有限公司 | Image defective pixel compensation method and system and photographing device |
| WO2017016322A1 (en) * | 2015-07-27 | 2017-02-02 | Boe Technology Group Co., Ltd. | Controller for compensating mura defects, display apparatus having the same, and method for compensating mura defects |
| US10249264B2 (en) | 2015-07-27 | 2019-04-02 | Boe Technology Group Co., Ltd. | Controller for compensating mura defects, display apparatus having the same, and method for compensating mura defects |
| CN117079586A (en) * | 2023-10-12 | 2023-11-17 | 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 |
| 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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| Publication number | Publication date |
|---|---|
| CN1224250C (en) | 2005-10-19 |
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Granted publication date: 20051019 Termination date: 20160909 |