Method, apparatus and system for display compensation based on reference luminance values obtained from test pictures

1. A method for display compensation, comprising:

measuring a luminance value of each of pixels in a full-color test picture outputted from a display apparatus in a uncompensated status when the display apparatus outputs the full-color test picture;

calculating and obtaining a luminance value with a highest probability in occurrence from the measured luminance values of the respective pixels, and taking the luminance value with the highest probability as a reference luminance value;

obtaining compensation coefficients for the respective pixels according to the reference luminance value and luminance values of the respective pixels;

performing a compensation and correction on signals inputted to the respective pixels respectively according to the compensation coefficients.

2. The method for display compensation according to claim 1 , wherein the full-color test picture comprises a full white test picture; or the full-color test picture comprises a full red test picture, a full green test picture and a full blue test picture;

wherein said measuring the luminance value of each of pixels in the full-color test picture outputted from the display apparatus comprises:

for each of the pixels in the full-color test picture outputted from the display apparatus, measuring a luminance value of red color R, a luminance value of green color G and a luminance value of blue color B respectively.

3. The method for display compensation according to claim 2 , wherein said obtaining the reference luminance value according to the measured luminance values of the respective pixels comprises:

obtaining a reference luminance value of R, a reference luminance value of G, a reference luminance value of B according to the measured luminance values of R, luminance values of G and luminance values of B of the respective pixels respectively.

4. The method for display compensation according to claim 3 , characterized in that said obtaining compensation coefficients for the respective pixels according to the reference luminance value and luminance values of the respective pixels comprises:

dividing the reference luminance value of R, the reference luminance value of G and the reference luminance value of B by the measured luminance value of a component R, the measured luminance value of a component G and the measured luminance value of a component B of each of the pixels respectively, and obtaining a compensation coefficient of the component R, a compensation coefficient of the component G, a compensation coefficient of the component B of each of the pixels respectively.

5. The method for display compensation according to claim 1 , wherein after the compensation coefficients are obtained, the method further comprises:

storing the compensation coefficients in a non-volatile memory, so that signals for the respective pixels can be compensated and corrected when the display apparatus is turned on or reset.

6. An apparatus for display compensation, comprising:

a measuring unit configured to measure luminance value of each of pixels in a full-color test picture outputted from a display apparatus in a uncompensated status, when the display apparatus outputs the full-color test picture;

a probability calculation module configured to calculate and obtain a luminance value with a highest probability in occurrence from the measured luminance values of the respective pixels, and to take the luminance value with the highest probability as a reference luminance value;

a processing unit configured to obtain compensation coefficients for the respective pixels according to the reference luminance value and the luminance values of the respective pixels; and

a compensation unit configured to perform a compensation and correction on signals inputted to the respective pixels respectively according to the compensation coefficients.

7. The apparatus for display compensation according to claim 6 , wherein the full-color test picture comprises a full white test picture; or the full-color test picture comprises a full red test picture, a full green test picture and a full blue test picture;

wherein the measuring unit is further configured to, for each of the pixels in the full-color test picture outputted from the display apparatus, measure a luminance value of red color R, a luminance value of green color G and a luminance value of blue color B respectively.

8. The apparatus for display compensation according to claim 7 , wherein the calculation unit is further configured to obtain a reference luminance value of R, a reference luminance value of G, a reference luminance value of B according to the measured luminance values of R, the measured luminance values of G and the measured luminance values of B of the respective pixels respectively.

9. The apparatus for display compensation according to claim 8 , wherein the processing unit comprises:

a RGB processing module configured to divide the reference luminance value of R, the reference luminance value of G and the reference luminance value of B by the measured luminance value of a component R, the measured luminance value of a component G and the measured luminance value of a component B of each of the pixels respectively, and to obtain a compensation coefficient of the component R, a compensation coefficient of the component G, a compensation coefficient of the component B of each of the pixels respectively.

10. The apparatus for display compensation according to claim 6 , further comprising:

a storage unit configured to store the compensation coefficients in a non-volatile memory, so that signals for the respective pixels are compensated and corrected when the display apparatus is turned on or reset.

11. A system for display compensation, comprising a display apparatus and the apparatus for display compensation according to claim 6 , wherein the apparatus for display compensation is configured to:

measure luminance value of each of pixels in a full-color test picture outputted from the display apparatus in a uncompensated status when the display apparatus outputs the full-color test picture;

calculating and obtaining a luminance value with a highest probability in occurrence from the measured luminance values of the respective pixels, and taking the luminance value with the highest probability as a reference luminance value;

obtaining compensation coefficients for the respective pixels according to the reference luminance value and luminance values of the respective pixels;

performing a compensation and correction on signals inputted to the respective pixels respectively according to the compensation coefficients.

12. The system for display compensation according to claim 11 , wherein the full-color test picture comprises a full white test picture; or the full-color test picture comprises a full red test picture, a full green test picture and a full blue test picture;

wherein the measuring unit is further configured to, for each of the pixels in the full-color test picture outputted from the display apparatus, measure a luminance value of red color R, a luminance value of green color G and a luminance value of blue color B respectively.

13. The system for display compensation according to claim 12 , wherein the calculation unit is further configured to obtain a reference luminance value of R, a reference luminance value of G, a reference luminance value of B according to the measured luminance values of R, the measured luminance values of G and the measured luminance values of B of the respective pixels respectively.

14. The system for display compensation according to claim 13 , wherein the processing unit comprises:

a RGB processing module configured to divide the reference luminance value of R, the reference luminance value of G and the reference luminance value of B by the measured luminance value of a component R, the measured luminance value of a component G and the measured luminance value of a component B of each of the pixels respectively, and to obtain a compensation coefficient of the component R, a compensation coefficient of the component G, a compensation coefficient of the component B of each of the pixels respectively.

15. The system for display compensation according to claim 11 , wherein the apparatus for display compensation further comprises:

a storage unit configured to store the compensation coefficients in a non-volatile memory, so that signals for the respective pixels are compensated and corrected when the display apparatus is turned on or reset.