Display Brightness Uniformity via Pixel Transmittance Mapping
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Solution Overview
Problem
Liquid crystal displays experience uneven brightness due to light scattering at the edges or high brightness of backlight sources, leading to overall brightness decrease when using a black plastic frame to improve uniformity.
Innovation Solution
A method involving a drive module that adjusts light transmittance of pixels using a mapping table to counteract light-leaking pixels, reducing their brightness to achieve uniform display brightness across the screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a black plastic frame is employed to improve brightness uniformity, then brightness uniformity is improved, but overall brightness decreases
Solution Approach 1:
The patent applies local quality by adjusting the light transmittance of specific pixels based on their position and light-leaking characteristics. The drive module divides pixels into different regions (first region with higher light transmittance, second region with lower light transmittance) and applies different transmittance values to different locations, thereby achieving uniform brightness without requiring a black plastic frame that would reduce overall brightness.
2Stability of the object's composition
If light transmittance of pixels is adjusted to counteract light-leaking pixels, then brightness uniformity is maintained, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-calculating and storing a mapping table that contains the relationship between pixel positions and their corresponding light transmittance values. This mapping table is generated in advance and stored in the drive module, allowing the system to quickly retrieve and apply appropriate transmittance values during operation without performing complex real-time calculations, thereby maintaining brightness uniformity while minimizing device complexity.
Data Source
AI summary
A display screen adjustment method, applied in a display screen includes a display module. The display screen adjustment method includes steps of: displaying a preset picture in a display area of the display module; dividing the display area into a plurality of subareas; detecting whether a brightness of the display area is uniform; determining which subareas have higher brightness than the other subareas; and decreasing light transmittances of pixels in the subareas having higher brightness to offset additional brightness of the pixels that is caused by light leaking of the pixels. An electronic device is also provided.