CN1707313A - Apparatus for regulating contrast of liquid crystal displaying method and regulating method thereof - Google Patents
Apparatus for regulating contrast of liquid crystal displaying method and regulating method thereof Download PDFInfo
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- CN1707313A CN1707313A CN 200410020677 CN200410020677A CN1707313A CN 1707313 A CN1707313 A CN 1707313A CN 200410020677 CN200410020677 CN 200410020677 CN 200410020677 A CN200410020677 A CN 200410020677A CN 1707313 A CN1707313 A CN 1707313A
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Abstract
The present invention relates to liquid crystal display module, and is especially the contrast regulating device and method of liquid crystal display module. The contrast regulating device consists of: liquid crystal display module, signal input part, signal processing part to process the input image signal into signal capable of being displayed, calibrator to convert the image signal into set resolution, storing part to store the image in frame unit, white pixel detecting part to detect at least one white pixel group and its white pixel percentage, and white brightness regulating part to regulate the white brightness of the white pixel group based on the percentage. The present invention makes it possible to obtain clear image.
Description
Technical field
The present invention relates to a kind of LCD MODULE, the contrast adjusting gear and the method for adjustment thereof of especially relevant LCD MODULE.
Background technology
In general, LCD as a kind of planar display, compare cathode-ray tube display, get the nod, its average power consumption amount is than the cathode-ray tube display much less of onesize picture, and, thermal value is also little, therefore, on the display device of the monitor of plasma display (PDP:Plasma Display Panel), Field Emission Display FED (Field Emission Display), nearest mobile phone screen, computing machine, televisor, paid close attention to widely.
This LCD is to be undertaken between two thin glass plates of surface-treated by special, poured into the intermediate liquid eutectic substance of solid and liquid, because glass plate voltage difference up and down, impel the permutations of liquid crystal molecule, the action principle of shaded-image takes place, but this LCD oneself itself can not be sent the light of expression literal, must add light source in order to see video picture at any time.
With reference to Fig. 1, the LCD MODULE contrast adjusting gear of prior art is described.
LCD MODULE contrast adjusting gear by prior art is made of following structure: LCD 5 and electroluminescent lamp 6 are formed liquid crystal display device module (Liquid Crystal Display); Power supply unit 7; The power conversion of being supplied with from above-mentioned power supply unit 7 becomes the transducer 8 that liquid crystal display device module must reference power supply; Signal input part 1 from the outside various picture signals of importing; But carry out the signal processing part 2 of display process by the picture signal of above-mentioned signal input part 1 input; Signal by above-mentioned signal processing part 2 is shown conversion, the essential drive division 3 that drives liquid crystal display device module; The picture signal of above-mentioned signal input part 1 input is transformed into liquid crystal display device module, the required control part 4 that carries out system's conversion and control.
The LCD MODULE contrast adjusting gear of prior art action as constituted above, by the various picture signals of signal input part 1 input, but and the picture signal of various picture signals by control part 4 selection video pictures.
Above-mentioned selected picture signal, but process signal processing part 2 is processed into the picture signal of video picture.
But the picture signal of the video picture that above-mentioned signal processing part 2 is handled is sent to drive division 3, be processed into the signal that drives LCD 5 by drive division 3 again, and above-mentioned LCD 5 drives by the signal of above-mentioned liquid crystal display-driving portion 3.
Above-mentioned LCD 5 is received by the power supply of power supply unit 7 through transducer 8 conversion, and opens electroluminescent lamp, that is to say that electroluminescent lamp 6 is finally realized image as light source.
The LCD MODULE contrast adjustment process of prior art by the picture signal of above-mentioned signal input part 1 input, is carried out the increase and decrease of marking current at signal processing part 2, afterwards the adjustment of degree of comparing as shown in Figure 2.
But the high-high brightness of LCD MODULE is that the brightness with above-mentioned electroluminescent lamp 6 determines, so as Fig. 3 institute, the image of high definition the lower phenomenon of contrast speed (ContrastRate) occurs than the image of low definition.
That is to say, LCD MODULE contrast method of adjustment by original technology, make the brightness variation of the brightness of LCD MODULE with electroluminescent lamp 6, so, its contrast speed of the image that sharpness is high is just low more more, therefore, LCD MODULE can not obtain distinct image with the variation of resolution, the problem that this method that Here it is exists.
Summary of the invention
The present invention proposes the contrast adjusting gear and the method for adjustment thereof of LCD MODULE in order to solve the problems of the technologies described above, purpose is in order to make LCD MODULE, obtains distinct more image with the raising of sharpness.
In order to reach aforesaid purpose, the contrast adjusting gear of LCD MODULE of the present invention is made of following structure: LCD MODULE; Receive the signal input part of picture signal from the outside; Be processed into the signal processing part that can carry out shows signal from the picture signal of signal input part input; The image signal transformation that signal processing part is obtained handling is a scaler of setting resolution; Obtaining the picture signal of conversion in scaler, is that unit carries out memory storing with the frame; From memory stores be the picture signal of unit with the frame, detect an above white pixel group at least, and each the white pixel group who detects is to the percentile white pixel test section of whole number of pixels; According to number percent, regulate the white brightness adjusting portion of this white pixel group signal that shows by liquid crystal display device module from the detected white pixel group of above-mentioned white pixel test section.
And in order to reach aforesaid purpose, the contrast method of adjustment of LCD MODULE of the present invention has LCD MODULE; Receive the signal input part of picture signal from the outside; The picture signal of signal input part output is processed into the signal processing part that can carry out shows signal; The image signal transformation that signal processing part obtains handling is for setting the scaler of resolution; The picture signal of conversion is in the LCD MODULE contrast adjusting gear that constitutes of the portions such as storage part that store of unit with the frame, comprises the following stage: receive stage with the picture signal of frame unit by storage part; From storage portion stores be the picture signal of unit with the frame, detect an above white pixel group's detection-phase at least; Each the white pixel group who is detected is to the percent detection-phase of whole number of pixels; According to percent, regulate the white brightness of this white pixel group signal that shows by liquid crystal display device module and regulate the stage from the detected white pixel group of white pixel test section.
Advantageous effect of the present invention: the contrast adjusting gear of LCD MODULE of the present invention and method of adjustment thereof are from the picture signal with frame, only detect the brightness of each the white pixel group within an above white pixel group's who forms by white pixel the frame, size according to pixel group, regulate brightness, thereby effectively control the contrast of final image.
Thereupon, within a frame, according to the size in white field, regulate mutually different brightness, thereby improve the resolution of LCD MODULE, and obtain distinct more image, therefore, the performance that has not only improved product also has the effect that reliability is improved greatly simultaneously.
Description of drawings:
Fig. 1 is the formation block diagram of contrast adjusting gear of the LCD MODULE of prior art.
Fig. 2 is the synoptic diagram that the contrast of the LCD MODULE of prior art is adjusted processing procedure.
Fig. 3 is the synoptic diagram by the sharpness signal model.
Fig. 4 is the block diagram that the contrast adjusting gear of LCD MODULE of the present invention constitutes.
Fig. 5 is the process flow diagram of the contrast method of adjustment of LCD MODULE of the present invention.
Fig. 6 is that to be shown as what detect white pixel be unit picture signal example synoptic diagram with the frame
The explanation ※ of ※ drawing major part symbol
10: signal input part; 20: signal processing part; 30: scaler; 40: storage part; 50: the white pixel test section; 60: the white brightness adjusting portion; 70: LCD MODULE.
Embodiment
Below, with reference to the drawing of appendix, further specify the contrast adjusting gear and the method for adjustment thereof of LCD MODULE of the present invention.
Fig. 4 is the block diagram that the contrast adjusting gear of LCD MODULE of the present invention constitutes.And Fig. 5 is the process flow diagram of the contrast method of adjustment of LCD MODULE of the present invention, and Fig. 6 is to be unit picture signal example synoptic diagram with the frame for what detect white pixel.
The contrast adjusting gear of LCD MODULE of the present invention at first, is described with reference to Fig. 4.
As shown in the figure, the contrast adjusting gear of LCD MODULE of the present invention is to be made of following structure: LCD MODULE 70; Receive the signal input part 10 of picture signal from the outside; Be processed into the signal processing part 20 that can carry out shows signal from the picture signal of signal input part 10 inputs; The image signal transformation that obtains from signal processing part 20 is a scaler 30 of setting resolution; In above-mentioned scaler 30 converted picture signals, be the storage part 40 that unit stores with the frame; From above-mentioned storage portion stores be among the picture signal of unit with the frame, detect at least more than one white pixel group, and each the white pixel group who detects is to the percentile white pixel test section 50 of whole number of pixels; According to number percent, regulate the white brightness adjusting portion 60 of this white pixel group signal that shows by above-mentioned LCD MODULE 70 from above-mentioned white pixel test section 50 detected white pixel groups.
At this moment, above-mentioned white pixel test section 50 should comprise and store the storage part (omitting among the figure) of the white pixel coordinate of group unit general more than at least 2 according to pixels.
See following again, action situation as the contrast adjusting gear of above-mentioned LCD MODULE of the present invention, being input to above-mentioned signal input part 10 picture signals is processed into through signal processing part 20 and can carries out the shows signal form, that is to say that the signal aspect that can receive with scaler 30 enters scaler 30.
Then, above-mentioned scaler 30 is the picture signal of being handled by signal processing part 20, be stored in storage part 40 with frame unit, reading with the frame is the picture signal that unit stores, and is transformed into the picture signal that meets LCD MODULE 70 sharpness and is input to LCD MODULE 70.
The present invention, utilize white pixel test section 50, is what be stored in storage part 40 that the picture signal reception that unit stores is come with the frame, from the picture signal that reception is come, detect the white pixel group, and detect each white pixel group's size (that is, forming the percent of white pixel group's pixel count) to whole pixel counts.
At this moment, above-mentioned white pixel group is in the picture signal of a frame, has the plural pixel that a direction is connected among horizontal, vertical at least and forms.
And, white brightness adjusting portion 60 is in order to realize final image in LCD MODULE 70, by the percent of white pixel test section 50 detected white pixel groups to whole number of pixels, decide white pixel group gray scale, gray scale is regulated each brightness white pixel group thus, thereby control is to the contrast of the picture signal of LCD MODULE 70 outputs.
As above-mentioned formation,, the contrast method of adjustment of LCD MODULE of the present invention is described as follows again with reference to Fig. 5:
At first, utilize above-mentioned white pixel test section 50, reading in storage part 40 with the frame is the picture signal of unit, from the picture signal of the frame unit of reading, detects more than one white pixel group (S10) again.
Describe white pixel test section 50 again in detail as shown in Figure 6, from (1,1) beginning, to (n, n) pixel is judged the data of the picture signal that forms a frame unit one by one.
At this moment, judge that white data (maximal value) that each pixel has after what, the coordinate of white pixel, is stored in storage part.Then, by detecting the white pixel of closing in the coordinate of the white pixel that is stored in storage part.
Illustrate, from sweep trace, detect (1,2), (1 for the first time, 4), (1,5), (1,6) white pixel is because of the white pixel of closing on of the white pixel that do not detect (1,2), so abandon, and closing on of the white pixel of (1,4) just can have been judged (1,5), the white pixel of (1,6) is just (1,5), the pixel coordinate of (1,6) has been stored in (1,4) pixel coordinate same domain.Same reason for the second time, detects (2,1), (2 from sweep trace, 4), (2,5), (2,6) white pixel is because fail to detect the white pixel of closing in (2,1) white pixel, so abandon, and (2,4), (2,5), the white pixel of (2,6) is closed on mutually, simultaneously, can judge and (1,4) coordinate of pixel coordinate has directly or indirectly and closes on mutually, and same reason has been stored in (1,4) pixel coordinate same domain with each pixel coordinate.That is to say, in (1,4) that store in the same field of storage part, (1,5), (1,6), (2,4), and (2,5), the white pixel of (2,6) is categorized as the first white pixel group 100.
By said process, the white pixel group (200,300,400) that all two above white pixel are closed on mutually detects, and each pixel coordinate is stored in the different mutually fields.
That is to say,, be stored in the different mutually fields white pixel group the first, the second, the three, the Sibai color pixel group (100,200,300,400) of the composition of two above white pixel.
Then, the pixel coordinate of forming each white pixel group of above-mentioned detection, judged several pixel coordinates earlier, calculate in each white pixel group the white pixel number to the percent (K) of whole number of pixels (S11), detect white pixel group's size with this.
Then, above-mentioned white brightness adjusting portion 60 will be according to the luminance standard of the white pixel group's who is detected by white pixel test section 50 percent (K), flows to LCD MODULE 70 and shows that the contrast of final images regulates.
In other words, in white brightness adjusting portion 60, the more than one white pixel group who detects by white pixel test section 50, whether each white pixel group's percent (K) was judged (S20) at 0 o'clock, above-mentioned white pixel group's percent is 0 o'clock, above-mentioned white brightness adjusting portion 60 is not moved (S21), and outputs to LCD MODULE 70 directly being sent by the picture signal of scaler 30 outputs.
Simultaneously, above-mentioned white pixel group's percent (K) is not 0 o'clock, but during a certain number, each white pixel group just can determine (S22) to the pairing luminance standard of percent (K) of whole number of pixels.
[table 1]
| K value (%) | Brightness (%) | K value (%) | Brightness (%) |
| ??1～10 | ??100 | ??51～60 | ??80 |
| ??11～20 | ??98 | ??61～70 | ??75 |
| ??21～30 | ??95 | ??71～80 | ??70 |
| ??31～40 | ??90 | ??81～90 | ??65 |
| ??41～50 | ??85 | ??91～100 | ??60 |
At this moment, with above-mentioned white pixel group are the tables (Look Up Table) (table 1 of top) that after repetition test, draw to the judgment standard of the corresponding luminance standard of percent (K) of whole number of pixels, with this table 1 decision luminance standard.
That is to say that each white pixel group that mutually different pixel counts is formed calculates the percent (K) of whole number of pixels, according to the percent (K) of each white pixel group to whole number of pixels, with reference to table 1, the decision luminance standard.
The present invention is, from being the picture signal of unit with the frame, detect the white pixel group who only forms by white pixel, then, according to each white pixel group size (promptly, percent to whole number of pixels) each white pixel group luminance standard is regulated, its result is controlled in the contrast of the final image that LCD MODULE 70 realizes.
Claims (5)
1, the contrast adjusting gear of LCD MODULE is characterized in that it being to be made of following structure:
LCD MODULE;
Receive the signal input part of picture signal from the outside;
Be processed into the signal processing part that can carry out shows signal from the picture signal of signal input part input;
The image signal transformation that obtains handling from signal processing part is a scaler of setting resolution;
Obtaining the picture signal of conversion in scaler, is the storage part that unit stores with the frame;
From storage portion stores be the picture signal of unit with the frame, detecting at least has more than one white pixel group, and each the white pixel group who detects is to the percentile white pixel test section of whole number of pixels;
The white pixel group's who detects according to the white pixel test section percent, the white brightness adjusting portion of regulating this white pixel group signal that shows by LCD MODULE.
2, the contrast adjusting gear of LCD MODULE according to claim 1, it is characterized in that above-mentioned white pixel group be horizontal, vertical among, form by plural adjacent to one another pixel at least in one direction.
3, the contrast adjusting gear of LCD MODULE according to claim 2 is characterized in that above-mentioned white pixel test section is to form each white pixel group, plural at least pixel coordinate, and according to pixels the group unit amount is stored in storage part.
4, the contrast method of adjustment of LCD MODULE is characterized in that having LCD MODULE; Receive the signal input part of picture signal from the outside; The picture signal of input is processed into the signal processing part that can carry out shows signal; The image signal transformation of handling is for setting the scaler of resolution; The picture signal of conversion is to be to be made of the following stage in the LCD MODULE contrast adjusting gear of the storage part stored of unit with the frame:
Being received with the frame by storage part is the stage of the picture signal of unit;
Storage portion stores be in the picture signal of unit with the frame, detect an above white pixel group's detection-phase at least;
To each white pixel group of being detected percent detection-phase to whole number of pixels;
The white pixel group's who detects according to the white pixel test section percent is regulated the white brightness of this white pixel group signal that is shown by LCD MODULE and is regulated the stage.
5, the contrast method of adjustment of LCD MODULE according to claim 4 is characterized in that being in the picture signal of unit with the frame, detects white pixel order of a group section and also comprises:
From being the picture signal of unit with the frame, detect the stage of white pixel in order;
To on the detected white pixel/down or a left side/right, have or not the judgement stage of the white pixel of closing on mutually;
If there is the white pixel close on mutually, be divided into the stage that the white pixel group in same field stores the white pixel of above-mentioned detection with the coordinate that closes on white pixel.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100206778A CN100365473C (en) | 2004-06-07 | 2004-06-07 | Apparatus for regulating contrast of liquid crystal displaying method and regulating method thereof |
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| CNB2004100206778A CN100365473C (en) | 2004-06-07 | 2004-06-07 | Apparatus for regulating contrast of liquid crystal displaying method and regulating method thereof |
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| CN1707313A true CN1707313A (en) | 2005-12-14 |
| CN100365473C CN100365473C (en) | 2008-01-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324722B (en) * | 2007-06-13 | 2010-11-03 | 深圳Tcl新技术有限公司 | Method for adjusting liquid crystal display device backlight lightness and contrast |
| US10714025B2 (en) | 2018-01-12 | 2020-07-14 | Au Optronics Corporation | Signal processing method and display device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3569352B2 (en) * | 1994-05-31 | 2004-09-22 | ペンタックス株式会社 | White balance adjustment device |
| EP1453030B1 (en) * | 2001-11-02 | 2011-06-22 | Sharp Kabushiki Kaisha | Image display apparatus |
| US6894666B2 (en) * | 2001-12-12 | 2005-05-17 | Samsung Sdi Co., Ltd. | Contrast correcting circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324722B (en) * | 2007-06-13 | 2010-11-03 | 深圳Tcl新技术有限公司 | Method for adjusting liquid crystal display device backlight lightness and contrast |
| US10714025B2 (en) | 2018-01-12 | 2020-07-14 | Au Optronics Corporation | Signal processing method and display device |
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| CN100365473C (en) | 2008-01-30 |
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Owner name: NANJING LG XINGANG DISPLAY CO., LTD. Free format text: FORMER OWNER: LG ELECTRONICS (SHENYANG) CO., LTD. Effective date: 20070518 |
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Effective date of registration: 20070518 Address after: 210038 No. 346 Yao Yao Avenue, Nanjing economic and Technological Development Zone, Jiangsu, China Applicant after: LG Electronics Nanjing Display Co., Ltd. Address before: 110179 35,40, hi tech Development Zone, Liaoning, Shenyang Applicant before: LG Electronic (Shenyang) Co., Ltd. |
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Granted publication date: 20080130 Termination date: 20170607 |
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