Serial Pixel Grouping for Gamma Correction in Display Devices
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Solution Overview
Problem
The half-source driving structure in active-type matrix display devices increases costs and degrades display quality due to difficulties in gamma curve correction for single color, leading to color unevenness and line mura issues.
Innovation Solution
A display device and driving method utilizing a configuration of three serially connected pixels, where each pixel is electrically coupled to a gate line and data line, allowing for progressive pulse signals and overlapping time intervals to facilitate gamma curve correction without Zigzag driving, reducing the number of data lines and enabling all gate fan-out lines to be within the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a half-source driving structure is adopted to reduce the number of source drivers, then the cost is reduced, but gamma curve correction for single color becomes difficult and display quality degrades
Solution Approach 1:
The pixel array is segmented into groups of three pixels (R, G, B) that are serially connected and share a common data line. This segmentation allows the display device to reduce the number of data lines by 2/3 while maintaining the ability to perform gamma curve correction for each color independently through sequential driving of gate lines.
Solution Approach 2:
The display device employs periodic action by sequentially enabling different gate lines (first gate line for red pixels, second gate line for green pixels, third gate line for blue pixels) at different time intervals. This periodic gating allows independent gamma curve correction for each color while using a shared data line structure, thus maintaining display quality with reduced hardware.
2Adaptability or versatility
If pixels are arranged in groups of three for RGB colors, then color display is achieved, but gamma curve correction requires complex Zigzag driving mode
Solution Approach 1:
The patent applies periodic action by sequentially activating gate lines for different color pixels (red, green, blue) in a repeating cycle. Each gate line is enabled during specific time intervals to allow independent gamma curve correction for each color group, eliminating the need for complex Zigzag driving while maintaining full color display capability.
Solution Approach 2:
The patent implements preliminary action by pre-organizing pixels into three distinct groups (R, G, B) with dedicated gate lines before operation. This preliminary grouping allows the driving circuit to sequentially address each color group with appropriate timing, simplifying the correction process and enabling independent gamma adjustment for each color without complex real-time switching.
3Quantity of substance
If data lines are reduced by half, then the number of source drivers is halved, but area of integrated circuit is reduced and cost is reduced
Solution Approach 1:
The patent segments the pixel array into groups of three (R, G, B pixels) that share a common data line. This segmentation reduces the total number of data lines required from N to N/3, thereby reducing the area occupied by data lines and source drivers in the integrated circuit, while maintaining full color display functionality through sequential gate line control.
Data Source
AI summary
An exemplary display device includes multiple pixels, first through third gate lines and a data line. The pixels include first through third pixels. The first through third gate lines respectively are electrically coupled with the first through third pixels and for deciding whether to enable the first through third pixels. The first pixel is electrically coupled to the data line to receive a display data provided by the data line. The second pixel is electrically coupled to the first pixel to receive a display data provided by the data line through the first pixel. The third pixel is electrically coupled to the second pixel to receive a display data provided by the data line through both the first pixel and the second pixel. A display driving method adapted to be implemented in the display device also is provided.