Digital Signal Processing for LCD Horizontal Cross-Talk Compensation
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Solution Overview
Problem
Existing liquid-crystal display technologies fail to effectively address horizontal cross-talk issues in color panel structures, particularly in compensating for cross-talk effects on both the front and back sides of the scan direction, leading to shadow patterns and color shifts due to incomplete compensation methods.
Innovation Solution
A digital-signal processing method that computes line-unit weight coefficients, compensation coefficients, and partial weight sums to calculate compensation quantities for each pixel, effectively addressing horizontal cross-talk by considering the positional relation and color information of adjacent pixels, thereby compensating for both the front and back sides of the scan direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional compensation methods are used, then processing complexity is reduced, but compensation precision deteriorates due to inability to address both front and back sides of scan direction
Solution Approach 1:
The patent divides the compensation process into two distinct segments: one for the front side of the scan direction and another for the back side. This segmentation allows each side to be compensated with appropriate weight coefficients, improving overall compensation precision without excessively increasing processing complexity through systematic organization.
Solution Approach 2:
The patent applies different weight coefficients to different spatial locations (front side vs. back side of scan direction) and different color channels (R, G, B). This local quality approach ensures that compensation is tailored to specific regions and color components, enhancing precision by accounting for location-specific and color-specific cross-talk characteristics.
2Reliability
If simple compensation is applied, then processing speed is improved, but compensation effectiveness deteriorates due to ignoring positional relations and color information
Solution Approach 1:
The patent performs preliminary calculations of weight coefficients and their sums before the actual compensation process. By pre-computing these values, the system reduces real-time processing requirements, maintaining high compensation effectiveness through comprehensive calculations while improving processing speed during actual operation.
Solution Approach 2:
The patent incorporates feedback mechanisms by using calculated compensation quantities to adjust the display signal. The system continuously monitors the effect of compensation and uses the computed weight coefficient sums to refine the compensation process, ensuring high effectiveness while maintaining efficient processing through iterative improvement.
3Measurement precision
If comprehensive compensation considering all pixels is implemented, then compensation precision is improved, but processing time increases
Solution Approach 1:
The patent performs preliminary calculations of weight coefficients and their sums before the actual compensation process. By pre-computing these values, the system reduces real-time processing requirements, maintaining high compensation precision through comprehensive calculations while improving processing speed during actual operation.
4Measurement precision
If location-specific compensation is applied, then compensation precision is improved, but device complexity increases due to additional calculations
Solution Approach 1:
The patent divides the compensation process into two distinct segments: one for the front side of the scan direction and another for the back side. This segmentation allows each side to be compensated with appropriate weight coefficients, improving overall compensation precision without excessively increasing processing complexity through systematic organization.
Solution Approach 2:
The patent performs preliminary calculations of weight coefficients and their sums before the actual compensation process. By pre-computing these values, the system reduces real-time processing requirements, maintaining high compensation precision through comprehensive calculations while improving processing speed during actual operation.
Data Source
AI summary
A digital-signal processing apparatus for processing elementary-color data to be output to a liquid-crystal display apparatus having a color panel structure, the digital-signal processing apparatus including: a line-unit weight-coefficient sum computation section; a compensation-coefficient computation section; a partial-weight-coefficient-sum computation section; a first-compensation-quantity-component computation section; a second-compensation-quantity-component computation section; a compensation-quantity computation section; a line memory used for applying a 1-line period extension process to each elementary-color data; and a horizontal-cross-talk compensation section for successively compensating each elementary-color data, which has been subjected to the 1-line period extension process in the line memory.