Brightness compensation method and device of display panels

Abstract

The invention provides a brightness compensation method and device of display panels, and belongs to the technical field of display. The brightness compensation method of display panels includes the steps that several display panels obtained after Gamma station processing are taken, and the brightness value of each test point in each display panel obtained after Gamma station processing is detected; according to the detected brightness value of each test point, the function relation between the brightness values and positions of each display panel obtained after Gamma station processing is obtained; according to the obtained function relation between the brightness values and positions of each display panel obtained after Gamma station processing, an optimal function relation is selected to serve as a standard function relation; according to the standard function relation, data voltage input into a display panel to be subjected to Gamma station processing is adjusted so that the brightness value of the display panel at the Gamma station can meet the standard function relation, and thus the brightness uniformity of the display panel can be improved.

Description

Technical field [0001] The invention belongs to the field of display technology, and in particular relates to a method and device for brightness compensation of a display panel. Background technique [0002] Under the current manufacturing process conditions, organic light emitting diode (Organic Light Emitting Diode, OLED) display devices have spatial and temporal non-uniformity problems, and as the size of display devices increases, such problems become more exposed. The invention is obvious, so solving the display unevenness of large-size OLED display devices has become one of the indispensable key technologies in mass production. The display unevenness of OLED display devices is closely related to the manufacturing process. When the threshold voltage value on the entire panel has a large difference, the overall brightness uniformity of the display device becomes worse; at the same time, the organic material used is in its own During the lifetime, there is also the problem of...

AI Technical Summary

Problems solved by technology

[0002] Under the current manufacturing process conditions, organic light emitting diode (Organic Light Emitting Diode, OLED) display devices have spatial and temporal non-uniformity problems, and as the size of the display device becomes larger, such problems are exposed more and more. Therefore, solving the display non-uniformity of large-size OLED display devices has become one of the indispensable key technologies in mass production.

The display unevenness of OLED display devices is closely related to the manufacturing process. When there is a large difference in the threshold voltage value of the entire panel, the overall brightness uniformity of the display device will become poor; at the same time, the organic materials used in their own There is also the issue of changing brightness during lifetime

This makes it impossible to completely solve such problems only through technological improvements, and can only be solved through various compensatory drives

[0003] In the prior art, a sub-circuit built with a thin film transistor (Thin Film Transistor, TFT) is usually used to compensate the brightness inside the pixel; the pixel structure and driving method of this method are relatively complicated, and the compensation effect is limited to the TFT threshold voltage and Line voltage drop cannot solve the afterimage problem; at the same time, in large-size, high-resolution and high-refresh display applications, this compensation method will cause the problem of reduced aperture ratio and slow drive speed

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