CN101350885A

CN101350885A - Method for automatically adjusting grey-scale coefficient curve and white balance of flat plate television

Info

Publication number: CN101350885A
Application number: CNA2008101247684A
Authority: CN
Inventors: 冯杰
Original assignee: Nanjing Panda Electronics Co Ltd; Panda Electronics Group Co Ltd
Current assignee: Nanjing Panda Electronics Co Ltd; Panda Electronics Group Co Ltd
Priority date: 2008-09-02
Filing date: 2008-09-02
Publication date: 2009-01-21
Anticipated expiration: 2028-09-02
Also published as: CN101350885B

Abstract

The invention aims at providing a method for automatically debugging the gray coefficient curve and the white balance of a flat-panel television, including that the actual optical properties of a panel is measured; a chroma analyzer acquires the color coordinates and brightness data on panel, and then sends data to a computer; the computer draws three nonlinear gray coefficient curves R/G/B, implements the linearization on non-linear curves R/G/B, and records and corrects the data; the computer implements the white balance adjustment on the three linear gray coefficient curves R/G/B, and then a gamma curve is obtained, the corresponding correction data is recorded; the computer adjusts the gamma curve to the gamma curve with the curve coefficient of 2.2 and obtains and records the final correction data; and writes the final adjustment data within the memory unit of the computer to the software module of a signal processing board. The method simplifies debugging steps on principle, thus realizing the automatic debugging of the gray coefficient curve and white balance of the flat-panel television.

Description

Panel TV gamma curves and white balance be the method for debugging automatically

Technical field

The present invention relates to flat panel display equipment, is a kind of method that is used for panel TV gamma curves and the automatic debugging of white balance specifically.

Background technology

At present along with the occupation rate of panel TV on market constantly improves, the panel TV complete machine is divided into panel and signal-processing board, run into aborning and the different problem of traditional C RT TV, because the inherent characteristic of panel makes that gamma curves (gamma) is irregular, red-green-blue does not overlap, cause adjusting difficulty, and automaticity is not high, and precision is not high yet, the consistency of product that influence is produced in batches.At present artificial manual adjustment needs for a long time, and often adjusts not in placely, and the whole piece curve is pulled one hair and move the whole body, and certain defective is also arranged on principle, causes when adjusting white balance, and different gray level white balances are variant.

Summary of the invention

The objective of the invention is by a kind of new method, on principle, simplify the step of debugging, thereby realize the automatic debugging of flat panel display equipment gamma curves and white balance.

The present invention solves the above problems by the following technical programs:

A kind of panel TV gamma curves and white balance be the method for debugging automatically, it is characterized in that comprising step:

A. the computer command driver module sends continuous R, the G that changes from low to high of brightness, B, white four groups of signals are given panel;

B. the colorimetric analysis instrument is gathered chromaticity coordinates data and the brightness data on the panel, and described data is sent in the memory cell of computer;

C. computer is at first according to the chromaticity coordinates data that receive and brightness data draw three nonlinearized gamma curves R/G/B and a brightness curve, then with nonlinear curve R/G/B linearisation, and corresponding correction data is recorded in the memory cell;

D. the gamma curves R/G/B of computer after with linearisation carries out the white balance adjustment, and three straight lines of R/G/B are overlapped, and obtains the gamma curve, notes corresponding correction data once more;

E. described gamma curve is adjusted into curve coefficients is 2.2 gamma curve to computer, obtains final correction data and is recorded in the memory cell;

F. in the software module with adjustment data write signal disposable plates final in the Computer Storage unit.

Wherein, described computer comprises nonlinear curve R/G/B linearisation step: computer calculates oppositely value with non-linearization GTG coefficient curve R/G/B pointwise, draw three S-curves, after described three S-curves and corresponding three non-linearization curve R/G/B compensate, the GTG coefficient curve R/G/B that panel shows is the linearisation straight line, and corresponding correction data is recorded in the memory cell;

The gamma curves R/G/B of described computer after with linearisation carries out in the white balance set-up procedure, adopts formula Y=Ax+B, obtains A, B, three straight lines of R/G/B can be overlapped;

Described signal-processing board is owing to there are differences when producing, and only need gain finely tune to R/G/B three looks to reach requirement;

Described computer forms the different gamma curve of multistage gamma curve coefficients on request with the gamma curve, obtains final correction data and is recorded in the memory cell.

Beneficial effect of the present invention is:

1. the debug process of gamma curves and white balance has realized automation, has shortened the time of debugging, improves precision, can solve this series products the puzzlement inconsistent problem of subjective feeling for a long time, i.e. white balance inconsistent problem always aborning.

2. consistency of product when having increased batch process is enhanced productivity, and the quality of production.

Description of drawings

Fig. 1 is the optical characteristics data acquisition system structured flowchart of panel of the present invention.

Fig. 2 is a debug process implementation structure block diagram of the present invention.

Fig. 3 is a nonlinear GTG coefficient curve R/G/B and a brightness curve.

Fig. 4 is linear GTG coefficient curve R/G/B.

Fig. 5 is the linear GTG coefficient curve R/G/B of three coincidences, i.e. gamma curve.

Fig. 6 is 2.2 gamma curve for curve coefficients.

Fig. 7 is many gamma curves that curve coefficients is different.

Fig. 8 is a workflow diagram of the present invention.

Embodiment

The present invention is further illustrated with embodiment in conjunction with the accompanying drawings in bottom:

Shown in accompanying

drawing

1,2,3,4,5,6,7, a kind of panel TV gamma curves and white balance be the method for debugging automatically, at first the computer command driver module sends continuous R, the G that changes from low to high of brightness, B, white four groups of signals are given panel, promptly measure the actual optical characteristics of panel, just gamma curves; The colorimetric analysis instrument is gathered chromaticity coordinates data and the brightness data on the panel, and described data is sent in the memory cell of computer; Computer is at first according to the chromaticity coordinates data that receive and brightness data draw three nonlinearized gamma curves R/G/B and a brightness curve, as shown in Figure 3, the gamma curve coefficients of also having drawn on the figure is 1.0 and 2.2 datum curve, then computer is with nonlinear curve R/G/B linearisation, promptly at first non-linearization GTG coefficient curve R/G/B pointwise (because coordinate data is a discrete magnitude) is carried out oppositely along the degree of 45 in coordinate system straight line, and calculate its reverse value, draw S-curve, after described three S-curves and corresponding three non-linearization curve R/G/B compensate, the GTG coefficient curve R/G/B that panel shows is the linearisation straight line, the convenient adjustment, be Fig. 3 to Fig. 4, corresponding correction data is recorded in the memory cell; The gamma curves R/G/B of computer after with linearisation carries out the white balance adjustment, adopts formula Y=Ax+B, obtains A, B, three straight lines of R/G/B can be overlapped, obtain the gamma curve, and reach the colour temperature requirement that to adjust, be Fig. 4 to Fig. 5, note corresponding correction data once more; It is 2.2 gamma curve that computer is adjusted into curve coefficients with described gamma curve, Fig. 5 is to Fig. 6, or described gamma curve coefficients formed the different curve of multistage gamma curve coefficients on request, Fig. 5 is to Fig. 7, obtains final correction data and is recorded in the memory cell; In the software module with adjustment data write signal disposable plates final in the Computer Storage unit.Described signal-processing board is owing to there are differences when producing, and only need gain finely tune to R/G/B three looks makes it reach requirement, and the final control signal disposable plates writes the gain data of adjusting in the memory body of disposable plates, thereby realizes whole process.

Claims

1, the method for the automatic debugging of a kind of panel TV gamma curves and white balance is characterized in that comprising step:

2, the method for the automatic debugging of panel TV gamma curves according to claim 1 and white balance, its feature exists, described computer comprises nonlinear curve R/G/B linearisation step: computer calculates oppositely value with non-linearization GTG coefficient curve R/G/B pointwise, draw three S-curves, after described three S-curves and corresponding three non-linearization curve R/G/B compensate, the GTG coefficient curve R/G/B that panel shows is the linearisation straight line, and corresponding correction data is recorded in the memory cell.

3, the method for the automatic debugging of panel TV gamma curves according to claim 1 and white balance, its feature exists, the gamma curves R/G/B of described computer after with linearisation carries out in the white balance set-up procedure, adopt formula Y=Ax+B, obtain A, B, three straight lines of R/G/B can be overlapped.

4, the method for the automatic debugging of panel TV gamma curves according to claim 1 and white balance, its feature exists, because signal-processing board there are differences when producing, only need gain finely tune to R/G/B three looks to reach requirement.

5, the method for the automatic debugging of panel TV gamma curves according to claim 1 and white balance, its feature exists, described computer forms the different gamma curve of multistage gamma curve coefficients on request with the gamma curve coefficients, obtains final correction data and is recorded in the memory cell.