Viewing Angle Image Compensation Circuit for Flat Panel Displays
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Solution Overview
Problem
Conventional viewing-angle image compensation technologies suffer from blur effects in high-frequency regions and color bleeding in low-saturation regions, leading to poor display quality at larger viewing angles.
Innovation Solution
A method and circuit for viewing-angle image compensation that detects frequency and saturation distributions in display regions, assigning weights to these regions to adjust pixel values and reduce blur and color bleeding through mixing-weight mapping, thereby minimizing the impact of compensation on high-frequency and low-saturation areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional viewing-angle image compensation is applied to compensate for color shift at large viewing angles, then color shift is reduced, but blur effect occurs in high-frequency display regions and color bleeding occurs in low-saturation display regions
Solution Approach 1:
The patent applies different compensation strategies to different regions of the display based on their frequency and saturation characteristics. High-frequency regions and low-saturation regions are identified and assigned different compensation weights or algorithms, allowing the system to maintain color accuracy in regions where it is needed while avoiding the application of compensation that would cause blur or color bleeding in sensitive regions
Solution Approach 2:
The display region is segmented into multiple zones based on frequency and saturation analysis. By dividing the display area into regions with different compensation requirements, the system can apply targeted compensation measures to each segment, thereby achieving overall color shift compensation without introducing artifacts in specific local areas
Data Source
AI summary
A method and a circuit for viewing-angle image compensation applied to a flat panel display are provided. A viewing-angle image compensation scheme is applied to an input image for improving a problem of color shift caused by a large viewing angle. The method further solves the blur effect in high frequency regions and color bleeding in low saturation regions of the input image after viewing-angle image compensation. In the method, a frequency distribution of the input image is detected and decremental frequency weights are assigned to the regions having high to low frequencies. A saturation distribution of the input image is detected and incremental saturation weights are assigned to the regions having high to low saturations. The weights assigned to the regions are used to designate degrees of the viewing-angle image compensation. The method can effectively reduce the effect of the viewing-angle image compensation on the image.