LCD Driving Method Reducing Data Line Voltage Transitions
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Solution Overview
Problem
Conventional liquid crystal display (LCD) panels suffer from poor pixel charge capacity due to high-low voltage variations during single color image display, leading to insufficient charge and reduced display quality.
Innovation Solution
A driving method for LCD panels where sub-pixels are divided into three groups, with K sub-pixels in each group sequentially charged in the order of the first, second, and third sub-pixel groups, reducing high-low level conversion frequencies of data lines and improving charge capacity by adjusting voltage levels for each color image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sub-pixels are charged sequentially in groups to reduce high-low level conversion frequencies, then charge capacity is improved, but charging time increases
Solution Approach 1:
The patent divides sub-pixels into three distinct groups (first sub-pixel group, second sub-pixel group, third sub-pixel group) and charges them sequentially in a specific order. This segmentation allows the data line to maintain a stable voltage level for longer periods by charging complete groups before moving to the next group, thereby reducing the frequency of high-low level conversions and improving charge capacity while managing charging time through structured progression.
2Manufacturing precision
If voltage levels are adjusted for different color images, then display quality is improved, but device complexity increases
Solution Approach 1:
The patent applies different voltage levels selectively based on the color image being displayed. When a first color image is displayed, a first voltage level is applied; when a second color image is displayed, a second voltage level is applied. This local quality approach allows the system to optimize charge delivery for different color sub-pixels without requiring a completely complex control system, as the voltage adjustment is tied to the specific display content and sub-pixel group being charged.
Data Source
AI summary
A method for driving a liquid crystal display panel includes dividing a plurality of sub-pixels in the same column into three sub-pixel groups, which comprises a first sub-pixel group, a second sub-pixel group, and a third sub-pixel group; and sequentially charging K sub-pixels in each sub-pixel group in the order of the first sub-pixel group, the second sub-pixel group, and the third sub-pixel group until all of the corresponding sub-pixels in each sub-pixel group are charged.