LCD Panel Slit Electrode Zoning for Chroma Uniformity
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Solution Overview
Problem
Liquid Crystal Display (LCD) panels experience non-uniformity in color due to light absorption by the light guider, resulting in differences in color at various distances from the backlight source, leading to chroma inconsistencies across the display.
Innovation Solution
The display panel is divided into zones with varying electrode sheet widths and slit widths for slit electrodes, with wider sheet widths and narrower slit widths at greater distances from the backlight source to compensate for light absorption, ensuring uniform chroma across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a sided-illuminating backlight module with a light guider is used, then the backlight can be provided to the liquid crystal panel, but the light guider absorbs light in different colors causing non-uniformity in color across the panel
Solution Approach 1:
The first substrate is divided into multiple zones (first zone, second zone, third zone, etc.) based on distance from the backlight source. Each zone has pixel elements with specifically designed slit electrodes having different electrode sheet widths and electrode slit widths tailored to compensate for light absorption at that position, thereby achieving uniform color across the entire panel
Solution Approach 2:
Different zones of the panel have different electrode configurations. Specifically, pixel elements in zones farther from the backlight source have wider electrode sheet widths and narrower electrode slit widths compared to zones closer to the backlight source. This local differentiation compensates for the varying light absorption effects across the panel
2Ease of manufacture
If uniform electrode sheet width and slit width are used across all zones, then manufacturing is simplified, but color non-uniformity occurs due to light absorption differences
Solution Approach 1:
The panel is segmented into multiple zones with different electrode specifications. This segmentation allows precise control of optical properties in each zone while maintaining a systematic manufacturing approach where each zone's electrodes are fabricated with predetermined dimensions based on its position
Solution Approach 2:
The electrode parameters (sheet width and slit width) are changed according to zone position. Pixel elements in zones farther from the backlight source use wider electrode sheets and narrower slits, while zones closer to the backlight source use narrower electrode sheets and wider slits, optimizing color uniformity across the panel
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively adjusts transmissivity in different zones to compensate for light absorption, addressing non-uniformity in chroma and enhancing color consistency across the LCD panel.
Implementation Method 1
The light guider 103 absorbs the light in different colors to some extent so that there may be differences in color in zones of the liquid crystal panel 104 at respective distances from the backlight source 101
Data Source
AI summary
A display panel is disclosed. The display panel includes a backlight module and first and second substrates. The first substrate comprises pixel elements arranged in an array, each including a sub-pixel element having a first slit electrode therein. The first substrate is divided into N zones. In addition, there are a uniform electrode sheet width and a uniform electrode slit width of the first slit electrodes in the pixel elements in each zone, the electrode sheet width of the first slit electrodes in the pixel elements in the i-th zone is less than the electrode sheet width of the first slit electrodes in the pixel elements in the (i+1)-th zone, and the electrode slit width of the first slit electrodes in the pixel elements in the i-th zone is greater than the electrode slit width of the first slit electrodes in the pixel elements in the (i+1)-th zone.