Display Panel Subpixel Timing to Reduce Triple-Gate Color Cast
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Solution Overview
Problem
Liquid crystal display devices using a triple-gate electrode driver framework experience color cast issues in single-color and two-color mixed-color screen images due to voltage fluctuations and insufficient pixel charging time, leading to reduced image quality and increased power consumption.
Innovation Solution
A display panel design where adjacent sub-pixels of different colors are connected to the same data line, with specific gate electrode driver units controlling the sub-pixels to alternate their scanning and charging times, allowing one sub-pixel to be turned off during a frame while extending the charging duration of the other, thereby improving color accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a triple-gate electrode driver framework is adopted to reduce the number of data lines, then the number of data lines is reduced to one-third, but the charging time of each gate electrode pulse is reduced to one-third, resulting in insufficient pixel charging time
Solution Approach 1:
The gate electrode driver is divided into multiple independent driver units (first gate electrode driver unit, second gate electrode driver unit, etc.), each capable of independently controlling different sub-pixels. This segmentation allows different gate electrode pulses to have different widths, enabling sufficient charging time for each pixel while maintaining the reduced data line structure.
2Productivity
If the number of scanning lines is increased to three times that of the normal driver framework, then more sub-pixels can be controlled, but the opening duration of the pixel driving circuit is compressed, resulting in insufficient pixel charging time
Solution Approach 1:
The gate electrode pulse width is made dynamic rather than uniform. Different gate electrode driver units can generate pulses with different widths based on the specific display content and pixel requirements. This dynamic adjustment allows the pixel driving circuit to have sufficient opening duration for charging while still controlling a large number of sub-pixels through the increased scanning lines.
3Productivity
If voltage is transmitted cyclically through data lines to control sub-pixels, then all sub-pixels can be addressed, but the amplitude fluctuates between high and low, presenting as a flickering screen and causing color cast issues
Solution Approach 1:
Different gate electrode driver units are assigned to control different sub-pixels based on their specific requirements. Each driver unit can independently adjust its gate electrode pulse characteristics (width, timing) to optimize the charging of its controlled sub-pixels. This local quality approach ensures that each sub-pixel receives appropriate charging time and voltage, eliminating color cast issues while maintaining comprehensive sub-pixel coverage.
Data Source
AI summary
The present application provides a display panel and a driving method thereof, electronic device, display panel includes data lines, a first sub-pixel and a second sub-pixel disposed adjacently and connected to a same one of the data lines. In a display stage of a first type frame, a second gate electrode driver unit connected to the second sub-pixel outputs a first effective scan signal to control the second sub-pixel to switch on and be loaded with a second data voltage to emit light, and a first gate electrode driver unit connected to the first sub-pixel controls the first sub-pixel to switch off.