Display device brightness compensation look-up table manufacturing method, device thereof, and display device
View Patent ↗The present application discloses a display device brightness compensation look-up table obtaining method. The method includes a parameter reading step, an initial grayscale brightness detection step, a compensation region brightness detection step, a compensation data obtaining step, and a compensation look-up table generation step. The above method solves a technical issue that conventional demura technologies cannot uniform brightness of the display panel to result in poor quality of the display panel.
1. A display device brightness compensation look-up table obtaining method, comprising:
a parameter reading step comprising loading a plurality of parameters into a process unit of a display device brightness compensation look-up table generation device, wherein the parameters comprise: compensation region dividing parameters of a display panel of a display device and a plurality of calibration gray scale values, and the compensation region dividing parameters comprise a means for dividing the display panel into a plurality of compensation regions;
an initial grayscale brightness detection step comprising according to one of the calibration gray scale values, for the display device displaying an image with the same calibration gray scale value throughout the image, detecting and recording a true brightness value of each of the compensation regions of the display device;
a compensation region brightness detection step comprising defining one of the compensation regions of the display device as a standard compensation region, and for the compensation region having the true brightness value different from the true brightness value of the standard compensation region, detecting the true brightness value of the compensation region after a display grayscale value of the display device is adjusted;
a compensation data obtaining step comprising repeatedly implementing the compensation region brightness detection step and defining the display grayscale value of the display device as compensation data when a difference between the true brightness value of the compensation region and the true brightness value of the standard compensation region is a minimum difference; and
a compensation look-up table generation step comprising under the calibration gray scale values, recording each of the compensation regions and compensation data of each of the compensation regions to constitute a brightness compensation look-up table corresponding to the calibration gray scale values.
2. The display device brightness compensation look-up table obtaining method according to claim 1 , wherein the means for dividing the display panel into the compensation regions comprises dividing the display panel into a plurality of compensation regions being rectangular, wherein an area of the compensation region near a periphery of the display device is less than an area of the compensation region near a center of the display device, and the compensation region located at the center of the display device is a standard compensation region.
3. The display device brightness compensation look-up table obtaining method according to claim 1 , wherein in the compensation region brightness detection step, the display device brightness compensation look-up table generation device simultaneously obtains the true brightness values of all of the compensation regions.
4. The display device brightness compensation look-up table obtaining method according to claim 1 , wherein the display device comprises a white tracking (WT) function including a frame control (FRC) function or a dither function, a grayscale value adjustment unit of the display device is less than 1 grayscale level, in the compensation region brightness detection step, the display grayscale value adjustment unit of the display device is less than 1 grayscale level.
5. The display device brightness compensation look-up table obtaining method according to claim 4 , wherein in the compensation data obtaining step repeatedly implementing the compensation region brightness detection step and defining the display grayscale value of the display device as compensation data when a difference between the true brightness value of the compensation region and the true brightness value of the standard compensation region is a minimum difference, the display grayscale value of the display device is adjusted by using an adjustment unit of 1 grayscale level to obtain a value of the minimum difference, and then is adjusted by using an adjustment unit less than 1 grayscale level to obtain a more precise value of the minimum difference.
6. The display device brightness compensation look-up table obtaining method according to claim 1 , wherein the display device brightness compensation look-up table generation device is connected to the display device through a transmission line to provide the display device in the initial grayscale brightness detection step with image data displayed entirely with the same calibration gray scale value, and the display device brightness compensation look-up table obtaining method, after the compensation look-up table generation step, further comprises:
a brightness compensation look-up table output step comprising outputting and storing the brightness compensation look-up table into the display device through the transmission line.
7. The display device brightness compensation look-up table obtaining method according to claim 1 , wherein the brightness compensation look-up table records each of the compensation regions and a compensation coefficient of each of the compensation regions, and the compensation coefficient=compensation data/calibration gray scale value.
8. The display device brightness compensation look-up table obtaining method according to claim 1 , wherein a number of the calibration gray scale values is less than 256, and a number of the calibration gray scale values less than level 128 is greater than a number of the calibration gray scale values greater than level 128.
9. The display device brightness compensation look-up table obtaining method according to claim 1 , wherein
the means for dividing the display panel into a plurality of compensation regions comprises dividing the display panel into a plurality of compensation regions being rectangular, wherein an area of the compensation region near a periphery of the display device is less than an area of the compensation region near a center of the display device, and the compensation region located at the center of the display device is the standard compensation region;
in the compensation region brightness detection step, the display device brightness compensation look-up table generation device simultaneously obtains the true brightness values of all of the compensation region; and
the display device comprises a white tracking (WT) function including a frame control (FRC) function or a dither function, a grayscale value adjustment unit of the display device is less than 1 grayscale level, in the compensation region brightness detection step, the display grayscale value adjustment unit of the display device is less than 1 grayscale level.
10. The display device brightness compensation look-up table obtaining method according to claim 9 , wherein in the compensation data obtaining step repeatedly implementing the compensation region brightness detection step and defining the display grayscale value of the display device as compensation data when a difference between the true brightness value of the compensation region and the true brightness value of the standard compensation region is a minimum difference, the display grayscale value of the display device is adjusted by using an adjustment unit of 1 grayscale level to obtain a value of the minimum difference, and then is adjusted by using an adjustment unit less than 1 grayscale level to obtain a more precise value of the minimum difference.
11. The display device brightness compensation look-up table obtaining method according to claim 9 , wherein the display device brightness compensation look-up table generation device is connected to the display device through a transmission line to provide the display device in the initial grayscale brightness detection step with image data displayed entirely with the same calibration gray scale value, and the display device brightness compensation look-up table obtaining method, after the compensation look-up table generation step, further comprises:
a brightness compensation look-up table output step comprising outputting and storing the brightness compensation look-up table into the display device through the transmission line.
12. The display device brightness compensation look-up table obtaining method according to claim 9 , wherein the brightness compensation look-up table records each of the compensation regions and a compensation coefficient of each of the compensation regions, and the compensation coefficient=compensation data/calibration gray scale value.
13. The display device brightness compensation look-up table obtaining method according to claim 9 , wherein a number of the calibration gray scale values is less than 256, and a number of the calibration gray scale values less than level 128 is greater than a number of the calibration gray scale values greater than level 128.
14. A display device brightness compensation look-up table generation device, comprising:
a brightness detection unit configured to detect an image brightness of a display panel of a display device;
a connection line unit configured to connect with the display device and provide a display device with a plurality of image data such that the display device generates an image with a single grayscale on the entire image according to the image data, and store the look-up table into a control unit of the display device after a look-up table is generated; and
a process unit connected to the brightness detection unit, and configured to receive detection data provided by the brightness detection unit, wherein the process unit comprises:
a parameter reading module configured to load a plurality of parameters, wherein the parameters is recorded in a storage module or inputted by a user interface module, and the parameters comprise: a plurality of compensation region dividing parameters of the display panel of the display device and a plurality of calibration gray scale values, wherein the compensation region dividing parameters comprise a means for dividing the display panel into a plurality of compensation regions;
a grayscale brightness detection module configured to control the brightness detection unit to detect true brightness values displayed by the compensation regions;
a compensation region brightness calculation module configured to define one of the compensation regions as a standard compensation region, and configured to, for the compensation region having the true brightness value different from the true brightness value of the standard compensation region, detect the true brightness value of the compensation region after a display grayscale value of the display device is adjusted;
a compensation data obtaining module configured to control the compensation region brightness calculation module to repeatedly implement compensation region brightness detection and define the display grayscale value of the display device as compensation data when a difference between the true brightness value of the compensation region and the true brightness value of the standard compensation region is a minimum difference; and
a compensation look-up table generation module configured to, under the calibration gray scale values, record each of the compensation regions and the compensation data of each of the compensation regions to constitute a brightness compensation look-up table corresponding to the calibration gray scale values; and
a brightness compensation look-up table output module configured to output and store the brightness compensation look-up table to the display device through the connection line unit.