A method for automatically correcting color coordinates and brightness of a display screen and related equipment

Abstract

The embodiment of the invention discloses a method for automatically correcting the color coordinates and the brightness of a display screen, and a related device, in order to automatically correct the color coordinates and the brightness of the display screen in mass production. The method comprises the following steps: determining target needs; calculating the brightness of white images of a to-be-adjusted screen under N gray scales according to gamma needs; calculating the brightness of a blue image corresponding to the brightness of the white image under each gray scale according to the brightness of the white images under the N gray scales, looking up the brightness of a red image and the brightness of a green image from a ratio lookup table according to the calculated brightness of the white images and the calculated brightness of the blue image; locking up a voltage value corresponding to the brightness of each monochromatic image from a brightness-voltage lookup table accordingto the brightness of the blue image, the brightness of the red image and the brightness of the green image; and inputting the voltage value corresponding to the brightness of each monochromatic imagein a driving IC of the to-be-adjusted screen for detection, and correcting the screen that does not satisfy the target needs.

Description

technical field [0001] The invention relates to the field of light-emitting display, in particular to a method and related equipment for automatically correcting color coordinates and brightness of a display screen. Background technique [0002] Organic electroluminescence display (Organic Electroluminesence Display, OELD) modules are widely used in various display fields, and OLED modules have different grayscale curves in different display fields. In addition, due to the differences in production process, integrated circuit (IC) and flexible printed circuit (FPC) devices, the panel panel cannot reach the normal white balance (color or color coordinate) state, and different customized Each OLED module will be optically corrected during production. [0003] The grayscale curve is a characteristic curve that shows the relationship between the grayscale of the second-speed display module and the brightness change. In order to make the display brightness of the display module ...

AI Technical Summary

Problems solved by technology

This method takes a long time, and because the resistance voltage drop (IR-Drop) is obvious in the white state of current OLED products, the formula calculates a large deviation between the theoretical RGB brightness and the actual brightness, and cannot accurately adjust the W brightness and color coordinates; compensation Debugging method: According to product characteristics and prior instructions, load the Gamma voltage value that meets the W brightness and color coordinate requirements of some screens into the display driver, test the brightness and color coordinate differences of the center point, and perform fine-tuning to achieve the target effect

Although this method takes less time, it requires high product uniformity, and it is cumbersome to measure the initial voltage value of multiple products, so it is not suitable for mass production.

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