Timing controller and operating method thereof

Abstract

A timing controller includes an image compensator for generating compensated image data. The image compensator is configured to: divide an input image into plural image blocks; select plural pixels located at one column of the image block as plural target pixels; generate an average representative gray level of the image block according to a histogram of gray levels of the image block; input the average representative gray level into a first lookup table to obtain a first gain; input a vertical pixel position of the target pixel and the average representative gray level into a second lookup table to obtain a second gain; obtain the compensated gray level by multiplying the gray level, the first gain, and the second gain of the target pixel; and replace the gray levels with the compensated gray levels to acquire the compensated image data.

Description

BACKGROUNDField of Invention[0001]The present invention relates to a timing controller and an operating method of the timing controller. More particularly, the present invention relates to the operating method of the timing controller of an organic light-emitting diode (OLED) display device, and the operating method is used for improving a brightness degradation induced by IR-Drop phenomenon.Description of Related Art[0002]The organic light-emitting diode (OLED) display possesses many outstanding properties of self-illumination, low driving voltage, high luminescence efficiency, short response time, high clarity and contrast, near 180° view angle, wide range of working temperature, applicability of flexible display and large scale full color display. The OLED display is considered as the most potential display device.[0003]With the progress of time and technology, the large scale, high resolution OLED display has been gradually developed. Correspondingly, the large scale OLED displa...

AI Technical Summary

Benefits of technology

The present invention is about a timing controller for controlling the display of images on a screen. The controller includes a receiver, an image compensator, and a transmitter. The image compensator splits the image into smaller blocks and selects certain pixels in each block as target pixels. It then averages the gray levels of pixels within each block and inputs this average into a lookup table to determine a gain for each target pixel. By using these gains, the image compensator calculates the compensated levels of each target pixel by multiplying them with the gain of the corresponding block. This compensated image data is then output by the transmitter. The technical effect of this invention is to improve the quality of images displayed on the screen by adjusting the brightness and color of each pixel within the image.

Problems solved by technology

This phenomenon causes that the display brightness of the entire panel is non-uniform (also called the brightness degradation).

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