CN103618861A - A method for calibrating image brightness of a tablet television receiver - Google Patents
A method for calibrating image brightness of a tablet television receiver Download PDFInfo
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- CN103618861A CN103618861A CN201310518140.3A CN201310518140A CN103618861A CN 103618861 A CN103618861 A CN 103618861A CN 201310518140 A CN201310518140 A CN 201310518140A CN 103618861 A CN103618861 A CN 103618861A
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Abstract
Provided is a method for calibrating image brightness of a tablet television receiver. The method comprises: a step that the tablet television receiver receives a gray-scale video signal and receives monochrome gray-scale signals at various signal source channels in a full-width 16-to-9 display status; a step of adjusting the controlled quantity of the image brightness of the tablet television receiver to a standard status or other prescribed status; and a step of changing the display ratio of a screen and calibrating black level: changing the display ratio of the screen of the tablet television receiver to a 4-to-3 status with a screen width type display function, wherein in the meantime, a monochrome gray-scale image frame is compressed in the horizontal direction and the two sides of the monochrome gray-scale image are provided with black tapes, namely a blank screen without images; then adjusting correlative register values of an image processing chip in the television receiver in order to adjust the brightness of the gray-scale signal in the darkest grade to be consistent with that of the black tape areas on the sides for completing black level calibration, thereby presenting a monochrome gray-scale signal with a monochrome gray-scale image the same as a signal source.
Description
One, technical field
The present invention relates to broadcasting television technology field, a kind of method of observing flat television receiver screen display GTG test signal is proposed, realize calibration chart image brightness black reference level, with what solve that current panel TV exists, cannot pass through the problem of detecting signal by oscilloscope waveform.
Two, background technology
As everyone knows, domestic TV is towards thinner more flat trend development.The panel TV of new generation that is considered as representative with liquid crystal, plasma electric has replaced traditional CRT TV, is called the main flow of Polarizations for Target Discrimination in Clutter.Along with the development of colour TV panelized and digitizing technique, the inner integrated level of television receiver is gradually improved, and a lot of circuit that are originally comprised of discrete component are all integrated in chip internal.At present panel TV internal signal processing capacity is only completed by a chips, and various vision signals are inputted this chip and after inter-process, converted digital signal to and export to display screen.Therefore, cannot detect the calibration that analog signal waveform is realized image brightness black level with oscilloscope.
Television receiver image brightness needs to adjust, and particularly, as the black level of benchmark, whether this level adjustment is correctly very large on the impact of screen picture image quality.But, on flat television receiver, various vision signals processing are all to complete at chip internal at present, after chip internal converts the required digital signal of display screen to, export, for the adjustment of black level, can not resemble over again CRT television receiver by realizing with detecting signal by oscilloscope waveform.The present invention is based on this problem and propose a kind of solution.
Three, summary of the invention
The present invention seeks to, propose the method for a kind of image brightness calibration of a kind of flat television receiver, the object of the invention is especially to propose to realize the method to the brightness adjustment of flat television receiver and calibration by the image of observation screen display.
Technical scheme of the present invention is: a kind of method of image brightness calibration of flat television receiver, is characterized in that step is as follows:
1) receive gray level video signal, flat television receiver is believed at each with full width (16:9) show state
Under source channels, receive black and white GTG signal;
2) the image brightness controlled quentity controlled variable of flat television receiver is adjusted to the state of standard state or other regulation;
3) change screen display ratio, calibration black level: screen " width type " Presentation Function by (in user remote controller) changes flat television receiver screen display ratio into 4:3 state, now black and white GTG image frame horizontal direction is compressed, there is black-tape (blank screen is without figure) in black and white gray scale image areas at both sides, adjust again the related register numerical value of television receiver internal image process chip, the darkest one-level brightness in GTG signal is adjusted to consistent with black-tape region, side, completes black reference level calibration.Can show black and white gray scale image black and white GTG consistent with signal source signal.
For compatible high definition and SD signal, the screen size of most panel TVs adopts 16:9 aspect ration example, by chip internal SCALER treatment circuit, is responsible for adjusting image displaying ratio.When panel TV is shown as lower time of aspect ration example state of 4:3, chip internal SCALER treatment circuit becomes 4:3 ratio by the image compression of demonstration automatically by computing, exceeds the region that this width type image shows and shows with black signal image.We can utilize this feature of panel TV to address the above problem.
Beneficial effect of the present invention: the gray scale image by observation screen display is realized adjustment and the calibration to flat television receiver brightness black level, method is extremely simple and clear, by the gray scale image of observation screen display, is adjusted after picture processing chip related register Numerical Implementation is controlled required digital signal and is exported.
Four, accompanying drawing explanation
Fig. 1 is that panel TV full width of the present invention shows eight GTG signals (b) and image (a);
Fig. 2 is that panel TV 4:3 displaying ratio of the present invention shows eight GTG signals (b) and image (a).
Five, embodiment
Embodiment: the method for flat television receiver image brightness calibration, receive gray level video signal, under each information source channel of panel TV, receive black and white GTG signal (eight GTG signals as shown in Figure 1).The various simulation controlled quentity controlled variables of television receiver are adjusted to the state of standard or other regulation; Change screen display ratio, calibration black level: be about to flat television receiver screen display ratio and change 4:3 state into, now image frame horizontal direction is compressed, and black-tape appears in image areas at both sides, this black-tape is the black signal of the inner output of picture processing chip.Now, then adjust the television receiver internal image process chip related register numerical value parameter of secondary brightness (be generally regulate), the darkest one-level brightness in GTG signal is adjusted to consistent with black-tape region, side, complete black reference level calibration, as shown in Figure 2.Utilize the inventive method, on the liquid crystal television receiver of the applicant's panda money model, adopted the present invention program.By the inventive method, can realize very soon the calibration function to image brightness black level.
Fig. 2 is the waveform schematic diagram of this liquid crystal television receiver black reference level calibration, and the numerical value by changing " secondary brightness " control register is adjusted to the darkest one-level brightness in GTG signal when consistent with black-tape region, side (entirely black) and shows black level adjustment on reference level.Fig. 1 and Fig. 2 can show intuitively and reflect the equivalence that uses this method and use oscilloscope detection waveform.In Fig. 1, the width type that image shows is 16:9, there is no black signal image on screen, and the darkest one-level brightness in GTG signal cannot compare by subjective observation; In Fig. 2, the width type that image shows is 4:3, and the region of screen sides beyond GTG is black signal image, and the darkest one-level brightness in GTG signal can compare by subjective observation.
Although the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on claims person of defining.
Claims (1)
1. the method that the image brightness of flat television receiver is calibrated, is characterized in that step is as follows:
1) flat television receiver receives gray level video signal, with full width 16:9 show state, receives black and white GTG signal under each information source channel;
2) the image brightness controlled quentity controlled variable of flat television receiver is adjusted to the state of standard state or other regulation;
3) change screen display ratio, calibration black level: change flat television receiver screen display ratio into 4:3 state by screen " width type " Presentation Function, now black and white GTG image frame horizontal direction is compressed, black and white gray scale image areas at both sides occurs that black-tape is that blank screen is without figure, adjust again the related register numerical value of television receiver internal image process chip, the darkest one-level brightness in GTG signal is adjusted to consistent with black-tape region, side, completes black reference level calibration; Show black and white gray scale image black and white GTG consistent with signal source signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310518140.3A CN103618861A (en) | 2013-10-28 | 2013-10-28 | A method for calibrating image brightness of a tablet television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310518140.3A CN103618861A (en) | 2013-10-28 | 2013-10-28 | A method for calibrating image brightness of a tablet television receiver |
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| CN103618861A true CN103618861A (en) | 2014-03-05 |
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| CN201310518140.3A Pending CN103618861A (en) | 2013-10-28 | 2013-10-28 | A method for calibrating image brightness of a tablet television receiver |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1273487A (en) * | 1999-05-06 | 2000-11-15 | 汤姆森多媒体公司 | Method for detecting horizontal black tape in video image |
| CN101035298A (en) * | 2006-03-07 | 2007-09-12 | 乐金电子（南京）等离子有限公司 | Gray coefficient adjusting device for automatically adjusting the picture brightness and the gray coefficient adjusting system and its method using the same |
| CN101452666A (en) * | 2007-12-04 | 2009-06-10 | 帆宣系统科技股份有限公司 | Image display system |
| CN101742157A (en) * | 2009-12-28 | 2010-06-16 | 深圳华为通信技术有限公司 | Video display method and device |
| CN102142216A (en) * | 2011-04-02 | 2011-08-03 | 奇智软件（北京）有限公司 | Method and system for testing color expression of displayer |
-
2013
- 2013-10-28 CN CN201310518140.3A patent/CN103618861A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1273487A (en) * | 1999-05-06 | 2000-11-15 | 汤姆森多媒体公司 | Method for detecting horizontal black tape in video image |
| CN101035298A (en) * | 2006-03-07 | 2007-09-12 | 乐金电子（南京）等离子有限公司 | Gray coefficient adjusting device for automatically adjusting the picture brightness and the gray coefficient adjusting system and its method using the same |
| CN101452666A (en) * | 2007-12-04 | 2009-06-10 | 帆宣系统科技股份有限公司 | Image display system |
| CN101742157A (en) * | 2009-12-28 | 2010-06-16 | 深圳华为通信技术有限公司 | Video display method and device |
| CN102142216A (en) * | 2011-04-02 | 2011-08-03 | 奇智软件（北京）有限公司 | Method and system for testing color expression of displayer |
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Application publication date: 20140305 |
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