Pixel Matrix Driving Method for VA Display Power Reduction
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Solution Overview
Problem
Existing VA-type liquid crystal display technologies face issues with high power consumption, leading to increased manufacturing costs and poor user experience due to temperature rises caused by driving chip heating.
Innovation Solution
A driving method and device for a pixel matrix that inverts data line polarity every two columns and exchanges voltage polarity every N sub-pixels, using a bow-shaped routing structure to alternately load high and low gray scale voltages, reducing power consumption and avoiding crosstalk and bright/dark lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If data line polarity is inverted every two sub-pixels to improve Washout problem, then display quality is improved, but power consumption increases causing driver IC temperature rise
Solution Approach 1:
The patent applies dynamic voltage loading by alternating between high gray scale voltage and low gray scale voltage every N sub-pixels. This dynamic switching allows the system to maintain display quality while reducing average power consumption, thereby lowering driver IC temperature without sacrificing display performance.
Solution Approach 2:
The patent changes the voltage parameter by using different gray scale levels (high and low) instead of constant voltage. By varying the voltage parameter every N sub-pixels, the system achieves both improved display quality through polarity inversion and reduced power consumption through optimized voltage levels.
2Manufacturing precision
If high gray scale voltage is loaded to all sub-pixels to maintain display brightness, then display quality is maintained, but power consumption increases
Solution Approach 1:
The patent applies partial action by loading high gray scale voltage only to specific sub-pixels (every N sub-pixels) rather than all sub-pixels continuously. This selective voltage application maintains display quality in critical areas while reducing overall power consumption through optimized voltage distribution.
Solution Approach 2:
The patent uses periodic action by alternating between high and low gray scale voltage every N sub-pixels. This periodic voltage switching maintains adequate display brightness while significantly reducing average power consumption compared to continuous high voltage application.
3Device complexity
If voltage is loaded to adjacent sub-pixels to simplify routing, then device complexity is reduced, but crosstalk and bright/dark lines occur
Solution Approach 1:
The patent applies inversion by alternating the polarity of data lines every two columns and exchanging voltage polarity every N sub-pixels. This inverted voltage loading pattern prevents crosstalk and bright/dark lines by ensuring adjacent sub-pixels have different voltage polarities, eliminating the harmful effects while maintaining routing simplicity.
Data Source
AI summary
The invention provides a driving method for a pixel matrix. The pixel matrix includes a plurality of sub-pixels arranged in a matrix, the polarity of data lines is inverted once every two columns, the polarity of the voltage loaded in the direction of the data lines is exchanged once every N sub-pixels, and each data line alternately loads the voltage to the lth column and (I+2)th column of sub-pixels every N sub-pixels. The driving method includes: acquiring original pixel data; generating a first driving voltage and a second driving voltage according to the original pixel data; and loading the first driving voltage or the second driving voltage to the pixel matrix along the data lines within one frame, where I≥1, N≥2. In addition, the invention further provides a display device.