LCD Screen Correction via Regional Tristimulus Compensation
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Solution Overview
Problem
Liquid crystal displays (LCDs) often suffer from non-uniform luminance and chromaticity issues due to manufacturing limitations and hardware defects, leading to visual discomfort as differences in display parameters between pixel points exceed human perception thresholds.
Innovation Solution
A screen correction method that acquires display parameters from multiple regions of an LCD, determines a target region with optimal luminance, converts these parameters to a uniform spectral tristimulus value, and compensates non-target regions to match the target display parameters, ensuring consistent luminance and chromaticity across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If LCD panel manufacturing is performed using conventional methods, then production efficiency and cost are maintained, but display uniformity deteriorates due to luminance and chromaticity differences between pixel points
Solution Approach 1:
The LCD screen is divided into multiple display regions, with each region further divided into multiple pixel points. This segmentation allows for region-specific correction parameters to be applied, addressing local luminance and chromaticity variations while maintaining overall system manageability.
Solution Approach 2:
The invention applies gamma correction and lookup table (LUT) corrections by modifying display parameters such as luminance and chromaticity values. Different correction parameters are applied to different regions and pixel points based on their measured characteristics, thereby improving display uniformity through parameter optimization.
2Ease of operation
If display parameters are not corrected, then device complexity remains low, but visual comfort deteriorates due to perceptible differences in luminance and chromaticity
Solution Approach 1:
Correction parameters are pre-calculated and stored in lookup tables during the manufacturing or calibration phase. During actual display operation, the system simply retrieves and applies these pre-computed parameters, which improves visual comfort without adding significant real-time processing complexity.
Solution Approach 2:
Lookup tables serve as intermediaries between the correction algorithm and the display hardware. The complex correction calculations are performed offline to generate LUTs, which then mediate the correction process during operation, simplifying the real-time system while maintaining correction effectiveness.
3Measurement precision
If uniform correction is applied to all regions, then implementation is simple, but display accuracy deteriorates due to ignoring regional variations in luminance and chromaticity
Solution Approach 1:
The invention applies different correction parameters to different display regions and pixel points based on their specific luminance and chromaticity characteristics. This localized correction approach ensures that each region is optimized for its particular properties, thereby improving overall display parameter accuracy while accounting for regional variations.
Data Source
AI summary
Embodiments of the present disclosure relate to the technical field of displays, and disclose a screen correction method, an electronic device, and a computer-readable storage medium. The method comprises: acquiring a first display parameter of pixel points in at least two display regions of a target screen, wherein the first display parameter comprises first spectral tristimulus values; determining a target region in the display regions and determining a second display parameter of pixel points in a non-target region in the display regions according to the first display parameter, wherein the target region is a display region among the display regions where a luminance parameter meets a preset requirement, and the second display parameter comprises second spectral tristimulus values; converting the luminance parameter into a target display parameter with the type of the second spectral tristimulus values; and compensating the second display parameter based on the target display parameter.