Display Timing Controller Crosstalk Compensation via Voltage Adjustment
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Solution Overview
Problem
Display apparatuses face issues with crosstalk due to interference between pixels, which affects image quality and visibility, particularly in liquid crystal display panels.
Innovation Solution
A display apparatus and control method that utilize a timing controller to adjust RGB image data by using lookup tables and weights to compensate for changes in common voltage, alternately outputting normal and inverted RGB image signals to reduce crosstalk without structural changes to the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid crystal display panel is used to display images, then image information can be visually displayed to users, but crosstalk occurs due to interference between pixels affecting image quality
Solution Approach 1:
The patent applies parameter changes by adjusting the common voltage level dynamically based on the displayed image content. When crosstalk is detected or anticipated (e.g., during high-contrast patterns), the common voltage is modified to compensate for the interference between pixels, thereby improving image quality without requiring structural changes to the display panel
Solution Approach 2:
The patent replaces potential hardware modifications with a software-based image processing approach. Instead of changing the physical structure of the display panel to reduce crosstalk, the invention uses timing controller software to process image data and adjust voltage parameters, substituting a mechanical/structural solution with an information-processing solution
2Reliability
If the common voltage is changed to compensate for crosstalk, then image quality improves, but additional control complexity is required
Solution Approach 1:
The timing controller is designed to perform multiple functions: it not only generates timing signals for the display panel but also processes image data, detects crosstalk conditions, and adjusts common voltage parameters. By making the timing controller multi-functional, the patent avoids adding separate control circuits, thereby managing complexity while achieving crosstalk compensation
3Reliability
If lookup tables and weights are used to adjust RGB image data, then crosstalk is reduced and viewing angles are enhanced, but processing time and computational load increase
Solution Approach 1:
The patent uses lookup tables (LUTs) that are pre-computed and stored in memory. Instead of performing complex real-time calculations for each pixel during display operation, the necessary adjustment values are prepared in advance and simply looked up during operation, significantly reducing processing time while maintaining image quality improvements
Data Source
AI summary
A display apparatus includes a display panel including a plurality of pixels; a source driver configured to convert RGB image data into an RGB image signal, and output the RGB image signal based on a common voltage to each of the plurality of pixels; and a timing controller configured to output the RGB image data to the source driver, and when it is determined the common voltage is changed, the timing controller may adjust the RGB image data to compensate the change of the common voltage, and output the adjusted RGB image data to the source driver.