OLED gray scale loss compensation method

Abstract

The invention provides an OLED gray scale loss compensation method in order to solve the gray scale loss problem of an OLED display panel. In the testing process of the OLED panel, the red channel lowest distinguishable gray scale, the red channel starting transformation gray scale, the green channel lowest distinguishable gray scale, the green channel starting transformation gray scale, the blue channel lowest distinguishable gray scale and the blue channel starting transformation gray scale are acquired and stored into an LED drive circuit; the LED drive circuit is used for detecting the voltages corresponding to the luminance, nonlinear gray scale compression transformation is conducted on display data according to a gray scale transformation equation provided in the method, the display data of an input image are compensated in real time, and the gray scale loss phenomenon caused by luminance variation is calibrated. After the method is used, the stability of display parameters of the OLED panel can be kept within a wide luminance variation range, and the original drawing detail loss caused by supply voltage fluctuation under the luminance variation condition of the display panel can be reduced.

Description

technical field [0001] The invention belongs to the technical field of OLED display panels, and in particular relates to a method for compensating OLED gray scale loss. Background technique [0002] Organic Light-Emitting Diode Display (OLED) is the main force in the new generation of flat panel display technology. Compared with other flat panel displays represented by liquid crystals, it has many advantages such as low cost, self-illumination, wide viewing angle, low voltage, low power consumption, all solid state display, anti-vibration, high reliability, and fast response. Since OLED is an active light-emitting display device, the light source utilization rate can reach 100%, and the display energy consumption is low. OLED is thin and light, only 1 / 3 of the thickness of LCD, and does not need backlight. OLED is known as the most potential third-generation display technology. With the development of information technology, OLED has initially entered the stage of industr...

AI Technical Summary

Problems solved by technology

The lower the supply voltage, the lower the current density, resulting in a decrease in OLED brightness

Therefore, when the display brightness of the OLED panel is reduced by reducing the power supply voltage of the OLED panel, the pixels of a specific gray scale will change from emitting to not emitting light, which leads to the so-called loss of gray scale when the OLED panel displays a specific image—— like image 3 and Figure 4 shown, where image 3 is the original image that needs to be displayed, Figure 4 It is the result that can be displayed when the voltage is lowered to 10%. As the voltage is lowered, the details of the original image are lost and the distortion intensifies

There is currently no effective solution to this problem

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