CN101059939A - LCD and its image edge enhancement method - Google Patents
LCD and its image edge enhancement method Download PDFInfo
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- CN101059939A CN101059939A CN 200610060410 CN200610060410A CN101059939A CN 101059939 A CN101059939 A CN 101059939A CN 200610060410 CN200610060410 CN 200610060410 CN 200610060410 A CN200610060410 A CN 200610060410A CN 101059939 A CN101059939 A CN 101059939A
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Abstract
The invention relates to a liquid crystal display, comprising a scan driver, a data driver, and a time sequence control and video output unit connected with the scan driver and the data driver, wherein the time sequence control and video output unit comprises an edge strength circuit and a convert matrix circuit, the edge strength circuit can strength the edge of the image signal of external YCbCr color space received by the time sequence control and video output unit, and the convert matrix circuit converts the processed image signal of the YCbCr color space into the image signal of RGB color space to be output to the data driver. The invention has clear image edge. And the invention also provides a method for strengthening the image edge of liquid crystal display.
Description
[technical field]
The present invention relates to a kind of LCD, particularly a kind of driving circuit of LCD.
[background technology]
At present, LCD has replaced conventional cathode ray tube (the Cathode Ray Tube that is used for counter gradually, CRT) display, and owing to characteristics such as the liquid crystal display utensil are light, thin, little, make its be fit to very much be applied to desktop PC, personal digital assistant (Personal Digital Assistant, PDA), portable phone, TV and multiple office automation and audio-visual equipment.
Seeing also Fig. 1, is a kind of synoptic diagram of LCD of prior art exposure.This LCD 100 comprises sequential control and video output unit 110, one scan driver 120, a data driver 130 and a display panels 140.This sequential control and video output unit 110 receive outer video signal, are translated into sweep signal and data-signal after treatment and export to this scanner driver 120 and data driver 130 respectively.This scanner driver 120 and this data driver 130 link to each other with this display panels 140, are used to drive this display panels 140 display images.
The external signal that this sequential control and video output unit 110 receive is generally the signal of YCbCr color space, this sequential control and video output unit 110 comprise a transition matrix circuit 111, it is used for the YCbCr signal of this sequential control and video output unit 110 receptions is converted into rgb signal, and it adopts a fixed correspondence that each pixel is transformed into rgb space from the YCbCr color space.
Each picture element signal is made up of three components at the YCbCr color space: luminance component Y and two color difference components Cb and Cr.Because the susceptibility that human eye changes brightness is usually above to color change, so the YCbCr signal is normally with the compressed signal of this color difference components compression.When the YCbCr signal is compressed, successively adjacent several pixels are divided into one group usually, because in most cases, the neighbor color is close and between same color zones, and institute is so that should the group shared color difference components Cb of pixel and Cr.As shown in Figure 2, a kind of compressed format is 4: 1: 1, be one group of shared Cb component and Cr component promptly with last four neighbors of delegation, and adopt different Y components, before compression, four pixels of one group all adopt Cb component and Cr component separately, when compressing sampling, choose this Cb component of organizing first pixel and Cr component and are this group shared Cb component and Cr component.As shown in Figure 3, another kind of compressed format is 4: 2: 2, promptly two adjacent pixels are one group of shared Cb component and Cr component on delegation, and adopt different Y components, before compression, one group two pixels all adopt Cb component and Cr component separately, and this two pixel is chosen this Cb component of organizing first pixel and Cr component and is this group shared Cb component and Cr component when compressing sampling.Above-mentioned YCbCr compressed signal can be saved storage space and reduce the transmission bandwidth demand, but because it loses the color difference components of some pixels when compression, and some neighbor color differs more greatly and not in a color interval, when being reduced into rgb signal, can there be slight distortion, so that soft edge.
[summary of the invention]
For solving the problem of above-mentioned LCD soft edge, be necessary to provide a kind of LCD of image edge clear.
Also be necessary to provide a kind of LCD image edge enhancement method.
A kind of LCD, it comprises the one scan driver, one data driver and sequential control and video output unit, this sequential control links to each other with this scanner driver and this data driver with video output unit, and it comprises an edge intensifier circuit and a transition matrix circuit, the picture signal of the outside YCbCr color space that this edge intensifier circuit can receive this sequential control and video output unit is carried out the edge enhancement process, and it comprises a brightness comparing unit and an aberration adjustment unit, this brightness comparing unit is used to receive the also luminance signal of compared pixels, this aberration adjustment unit is used to receive the colour difference signal of pixel, and according to the comparative result of this brightness comparing unit the color difference components of pixel is adjusted, the picture signal of the YCbCr color space after this transition matrix circuit will be handled is converted to the picture signal of rgb color space and exports to this data driver.
A kind of LCD image edge enhancement method, the compressing image signal of this outside YCbCr color space comprises many group packed pixel signals, every group of packed pixel signal comprises a pixels sampled signal and at least one non-pixels sampled signal, the step of this method comprises: provide an edge intensifier circuit, the aberration adjustment circuit that it comprises a brightness comparator circuit and is connected with this brightness comparator circuit; The size of the luminance difference of this brightness comparator circuit pixels sampled signal that relatively this non-pixels sampled signal and its two are adjacent, and comparative result is sent to this aberration adjusts circuit; This aberration is adjusted circuit will give this non-pixels sampled with the color difference components of the little pixels sampled signal of this non-pixels sampled difference.
Compared with prior art, because the sequential control and the video output unit of above-mentioned LCD further comprise an edge intensifier circuit, it is judged between can the color zones at pixel place to the YCbCr picture signal of compression and the color difference components of this pixel is adjusted, thereby realize this YCbCr edge of image enhancement process, YCbCr picture signal after the edge enhancement process is the RGB picture signal by this transition matrix circuit conversion, can make the image edge clear of this liquid crystal display displays.In like manner, above-mentioned LCD image edge enhancement method can make the image edge clear of this liquid crystal display displays.
[description of drawings]
Fig. 1 is the synoptic diagram of the LCD of prior art.
Fig. 2 is that compression factor is the synoptic diagram of 4: 1: 1 YCbCr picture signal.
Fig. 3 is that compression factor is the synoptic diagram of 4: 2: 2 YCbCr picture signal.
Fig. 4 is the synoptic diagram of LCD of the present invention.
Fig. 5 is the synoptic diagram of edge intensifier circuit shown in Figure 4.
Fig. 6 is that compression factor is the synoptic diagram of 4: 1: 1 YCbCr picture signal one-row pixels.
Fig. 7 is that compression factor is the synoptic diagram of 4: 2: 2 YCbCr picture signal one-row pixels.
[embodiment]
Seeing also Fig. 4, is the synoptic diagram of the LCD of the present invention's one better embodiment.This LCD 200 comprises sequential control and video output unit 210, one scan driver 220, a data driver 230 and a display panels 240.This sequential control and video output unit 210 comprise an edge intensifier circuit 211 and a transition matrix circuit 212.This sequential control and video output unit 210 receive outside vision signal, and are converted into sweep signal and data-signal, and export to this scanner driver 220 and this data driver 230 respectively.This scanner driver 220 and this data driver 230 are used to provide picture signal to this display panels 240, to control the demonstration of this display panels 240.This edge intensifier circuit 211 is used for the picture signal of the YCbCr color space of this sequential control and video output unit 210 receptions is carried out the edge enhancement process, makes edge of image clear.This transition matrix circuit 212 will be the signal of rgb space through the YCbCr conversion of signals after this edge intensifier circuit 211 is handled, and be sent to this data driver 230.
Seeing also Fig. 5, is the synoptic diagram of this edge intensifier circuit 211.This edge intensifier circuit 211 comprises a brightness comparing unit 213 and an aberration adjustment unit 214.This brightness comparing unit 213 is used to receive the also luminance component of compared pixels, and this aberration adjustment unit 214 is used to receive the color difference components of pixel and according to the comparative result of this brightness comparing unit 213 color difference components of pixel is adjusted.The YCbCr picture signal of 211 pairs of compressions of this edge intensifier circuit is carried out edge enhancement process line by line, and its process is: the YCbCr picture signal that receives delegation's compression; Judge between the color zones at each pixel place of 213 pairs of these row images of this brightness comparing unit; Pixel after 214 pairs of judgements of this aberration adjustment unit is carried out the color adjustment.Delegation's compressing image signal of this outside YCbCr color space generally includes many group packed pixel signals, every group of packed pixel signal comprises a pixels sampled signal and at least one non-pixels sampled signal, this edge intensifier circuit is judged between its color zones by the luminance difference of the two pixels sampled signals that this non-pixels sampled signal relatively is adjacent, and will give this non-pixels sampled with the color difference components of the little pixels sampled signal of this non-pixels sampled difference, color difference components to this non-sampling sample element is adjusted, to reach the purpose that the edge strengthens.Be that 4: 1: 1 and compression factor are that to carry out the edge enhancement process be that example illustrates its process for the picture signal of 4: 2: 2 YCbCr color space with 211 pairs of compression factor of this edge intensifier circuit below.
Seeing also Fig. 6, is that compression factor is 4: 1: 1 the YCbCr of a delegation picture signal.This row pixel comprises the YCbCr picture element signal of many group compressions, and every group of pixel all comprises four pixels, and this four pixel all adopts identical Cb and Cr component, and adopts different Y components.With the processing procedure of this first pixel groups 31 processing procedure to this row pixel is described below.This first pixel groups 31 comprises four pixels: first pixel 301, second pixel 302, the 3rd pixel 303 and the 4th pixel 304, wherein, this first pixel 301 is a pixels sampled.This four pixel all adopts identical color difference components Cb
1,1And Cr
1,1, and adopt different luminance component Y
1,1, Y
1,2, Y
1,3And Y
1,4 Second pixel groups 32 adjacent with this first pixel groups 31 also comprises four pixels: the 5th pixel 305, the 6th pixel 306, the 7th pixel 307 and the 8th pixel 308, and wherein, the 5th pixel 305 is a pixels sampled, its brightness and color difference components are respectively Y
1,5, Cb
1,5And Cr
1,5Processing procedure to this first pixel groups 31 is: this brightness comparing unit 213 is the brightness Y of this second pixel 302 relatively
1,2Brightness Y with this first pixel 301
1,1Difference and with the brightness Y of the 5th pixel 305
1,5Difference, comparative result is sent to this aberration adjustment unit 214; Principle was adjusted the color difference components of this second pixel 302 under this aberration adjustment unit 214 was complied with: if the brightness Y of this second pixel 302
1,2Brightness Y with this first pixel 301
1,1Difference less than the brightness Y of this second pixel 302
1,2Brightness Y with the 5th pixel 305
1,5Difference, the color that then shows this second pixel 302 more near this first pixel 301 and this first pixel 301 belong between same color zones, keep its color difference components Cb
1,1And Cr
1,1Constant; Otherwise, the color that then shows this second pixel 302 more near the 5th pixel 305 and the 5th pixel 305 belong between same color zones, the color difference components of this second pixel 302 is adjusted into the color difference components Cb of the 5th pixel 305
1,5And Cr
1,5If two above-mentioned differences equate, then still keep the color difference components Cb of this second pixel 302
1,1And Cr
1,1Constant.After handling this second pixel 302, next adopt the method for handling this first pixel 301 and this first pixel 301 and the 5th pixel 305 to compare and the color difference components adjustment successively to the 3rd pixel 303, the 4th pixel 304.After handling the signal of this first pixel groups 31, the remaining pixel groups of this row is handled, can be finished the edge enhancement process of this row YCbCr picture signal with identical method.Can handle every capable pixel according to said method, after so handling, close color before the reducible Cheng Yuwei compression of the color of the non-pixels sampled of YCbCr picture signal makes edge of image clear.
Seeing also Fig. 7, is that compression factor is 4: 2: 2 the YCbCr of a delegation picture signal.This row pixel comprises the YCbCr picture element signal of many group compressions, and every group of pixel all comprises two pixels, and this two pixel all adopts identical Cb and Cr component, and adopts different Y components.With the processing procedure of this first pixel groups 41 processing procedure to this row pixel is described below.This first pixel groups 41 comprises first pixel 401 and second pixel 402, and this two pixel all adopts identical color difference components Cb
1,1And Cr
1,1, and adopt different luminance component Y
1,1And Y
1,2, this first pixel 401 is a pixels sampled.Second pixel groups 42 adjacent with this first pixel groups 41 comprises the 3rd pixel 403 and the 4th pixel 404, and this two pixel all adopts identical color difference components Cb
1,3And Cr
1,3, and adopt different luminance component Y
1,3And Y
1,4Edge treated process to this first pixel groups 41 is: this brightness comparing unit 213 is the brightness Y of this second pixel 402 relatively
1,2Brightness Y with this first pixel 401
1,1Difference and with the brightness Y of the 3rd pixel 403
1,3Difference, and comparative result is sent to this aberration adjustment unit 214; This aberration adjustment unit 214 is adjusted the color difference components of this second pixel 402 according to following principle: if the brightness Y of this second pixel 402
1,2Brightness Y with this first pixel 401
1,1Difference less than the brightness Y of this second pixel 402
1,2Brightness Y with the 3rd pixel 403
1,3Difference, the color that then shows this second pixel 402 more near this first pixel 401 and this first pixel 401 belong between same color zones, keep its color difference components Cb
1,1And Cr
1,1Constant; Otherwise, the color that then shows this second pixel 402 more near the 3rd pixel 403 and the 3rd pixel 403 belong between same color zones, the color difference components of this second pixel 402 is adjusted into the color difference components Cb of the 3rd pixel 403
1,3And Cr
1,3If two above-mentioned differences equate, then still keep the color difference components Cb of this second pixel 402
1,1And Cr
1,1Constant.According to said method the remaining pixel groups of this row is handled again, can be finished the edge treated of this row pixel 40.Equally successively the pixel of other row is carried out edge treated, after so handling, close color before the reducible Cheng Yuwei compression of the color of the non-pixels sampled of YCbCr picture signal makes edge of image clear.
Compared to prior art, because the sequential control and the video output unit 210 of above-mentioned LCD 200 further comprise an edge intensifier circuit 211, the brightness of each non-pixels sampled of YCbCr picture signal that it can be by relatively this compression and two adjacent pixels sampled of this pixel comes the color of this non-pixels sampled is adjusted, after so handling, close color before the reducible Cheng Yuwei compression of the color of the non-pixels sampled of YCbCr picture signal, thereby strengthen the edge effect of YCbCr picture signal, after the YCbCr picture signal that this edge intensifier circuit 211 of process is handled was converted to the picture signal output of rgb space, the edge of image effect was preferable.
Claims (6)
1. LCD, it comprises:
The one scan driver;
One data driver;
One sequential is controlled and video output unit, can receive the compressing image signal of outside YCbCr color space, and it links to each other with this scanner driver and this data driver, and this sequential control and video output unit comprise:
One transition matrix circuit, its image signal with the YCbCr color space are converted to the image signal of rgb color space and export to this data driver,
It is characterized in that: this sequential control and video output unit further comprise an edge intensifier circuit, the compressing image signal of the outside YCbCr color space that it can receive this video and sequential control module carries out the edge enhancement process, it comprises a brightness comparing unit and an aberration adjustment unit, this brightness comparing unit is used to receive the also luminance signal of compared pixels, this aberration adjustment unit is used to receive the colour difference signal of pixel, and according to the comparative result of this brightness comparing unit the color difference components of pixel is adjusted, the image signal of the YCbCr color space after this edge intensifier circuit will be handled is sent to this transition matrix circuit.
2. LCD as claimed in claim 1, it is characterized in that: the compressing image signal of this outside YCbCr color space comprises many group packed pixel signals, every group of packed pixel signal comprises a pixels sampled signal and at least one non-pixels sampled signal, the luminance difference of this edge intensifier circuit pixels sampled signal that relatively this non-pixels sampled signal and its two are adjacent, and the color difference components of the pixels sampled signal that difference is little is given this non-pixels sampled.
3. LCD as claimed in claim 2 is characterized in that: the compression factor of the picture signal of the YCbCr color space that this is outside is 4: 1: 1.
4. LCD as claimed in claim 2 is characterized in that: the compression factor of the picture signal of the YCbCr color space that this is outside is 4: 2: 2.
5. LCD as claimed in claim 2 is characterized in that: this LCD further comprises a display panels that is connected with this scanner driver and data driver.
6. LCD image edge enhancement method, the compressing image signal of this outside YCbCr color space comprises many group packed pixel signals, every group of packed pixel signal comprises a pixels sampled signal and at least one non-pixels sampled signal, and the step of this method comprises:
Provide an edge intensifier circuit, the aberration adjustment circuit that it comprises a brightness comparator circuit and is connected with this brightness comparator circuit;
The size of the luminance difference of this brightness comparator circuit pixels sampled signal that relatively this non-pixels sampled signal and its two are adjacent, and comparative result is sent to this aberration adjusts circuit;
This aberration is adjusted circuit will give this non-pixels sampled with the color difference components of the little pixels sampled signal of this non-pixels sampled difference.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100604100A CN100543827C (en) | 2006-04-21 | 2006-04-21 | LCD and image edge enhancement method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100604100A CN100543827C (en) | 2006-04-21 | 2006-04-21 | LCD and image edge enhancement method thereof |
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| Publication Number | Publication Date |
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| CN101059939A true CN101059939A (en) | 2007-10-24 |
| CN100543827C CN100543827C (en) | 2009-09-23 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101551991B (en) * | 2008-03-11 | 2011-12-21 | 陈宏铭 | Method for enhancing perceptibility of image |
| CN102693699A (en) * | 2011-03-25 | 2012-09-26 | 三洋电机株式会社 | Display apparatus |
| CN103581637A (en) * | 2012-07-23 | 2014-02-12 | 佳能株式会社 | Image processing apparatus and image processing method |
| CN109727582A (en) * | 2017-10-31 | 2019-05-07 | 深圳富泰宏精密工业有限公司 | The bearing calibration of electronic device and its display screen |
-
2006
- 2006-04-21 CN CNB2006100604100A patent/CN100543827C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101551991B (en) * | 2008-03-11 | 2011-12-21 | 陈宏铭 | Method for enhancing perceptibility of image |
| CN102693699A (en) * | 2011-03-25 | 2012-09-26 | 三洋电机株式会社 | Display apparatus |
| CN103581637A (en) * | 2012-07-23 | 2014-02-12 | 佳能株式会社 | Image processing apparatus and image processing method |
| US9349161B2 (en) | 2012-07-23 | 2016-05-24 | Canon Kabushiki Kaisha | Image processing apparatus and image processing method with edge enhancement |
| CN103581637B (en) * | 2012-07-23 | 2016-09-14 | 佳能株式会社 | Image processing equipment and image processing method |
| CN109727582A (en) * | 2017-10-31 | 2019-05-07 | 深圳富泰宏精密工业有限公司 | The bearing calibration of electronic device and its display screen |
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| Publication number | Publication date |
|---|---|
| CN100543827C (en) | 2009-09-23 |
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Granted publication date: 20090923 Termination date: 20200421 |