Display Compensation System for Luminance Uniformity
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Solution Overview
Problem
Display panels often suffer from luminance non-uniformity due to variations in subpixel characteristics, leading to image quality issues like screen blotches and unevenness, which existing compensation methods fail to adequately address while also consuming excessive memory and power.
Innovation Solution
A display compensation system and method that generates compensation data by photographing the displayed image, calculating luminance differences, and adjusting shift voltages to enhance luminance uniformity, efficiently utilizing memory and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing compensation methods are used to address luminance non-uniformity, then image quality improves, but memory consumption and power consumption increase excessively
Solution Approach 1:
The patent extracts and stores only the essential compensation parameters (luminance difference values and shift voltages) in a compact format, rather than storing complete compensation lookup tables. This selective extraction of critical data reduces memory consumption while maintaining luminance uniformity compensation capability.
Solution Approach 2:
Instead of storing large compensation tables and looking up values, the patent inverts the approach by storing minimal luminance difference data and calculating shift voltages on-demand through iterative adjustment. This inversion from storage-heavy to computation-light methodology reduces memory requirements.
2Manufacturing precision
If existing compensation methods are used to address luminance non-uniformity, then image quality improves, but power consumption increases excessively
Solution Approach 1:
The patent applies partial action by implementing compensation only for luminance differences that exceed a threshold, rather than uniformly processing all pixels. The iterative shift voltage adjustment also applies partial corrections incrementally, reducing computational overhead and power consumption while achieving adequate luminance uniformity.
3Manufacturing precision
If compensation data is stored for all luminance levels, then luminance uniformity across all bands improves, but memory space utilization decreases
Solution Approach 1:
The patent applies local quality by focusing compensation efforts specifically on low luminance bands where luminance non-uniformity is most problematic, rather than uniformly compensating all luminance levels. This selective local compensation reduces memory requirements while improving perceived image quality in critical regions.
Solution Approach 2:
The patent segments the luminance range into different bands and applies differentiated compensation strategies, with enhanced compensation for low luminance bands and reduced compensation for high luminance bands. This segmentation allows efficient memory utilization by storing compensation data only where most needed.
Data Source
AI summary
Embodiments of the disclosure relate to a display compensation system and a display panel compensation method. Specifically, it is possible to enhance the luminance uniformity of the display panel by generating a current temporary shift voltage by adding a unit offset voltage to a previous temporary shift voltage, generating modified image data by compensating for image data based on the current temporary shift voltage, driving the display panel based on the modified image data, and reducing the luminance difference value which is the difference between the maximum luminance data and the minimum luminance data for the display panel.