Electronic Display Self-Coupling Compensation for Pixel Artifacts
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Solution Overview
Problem
Image artifacts occur in electronic displays due to self-coupling cross talk between display pixels sharing a common data line, affecting the brightness of one pixel by image data from subsequently programmed pixels.
Innovation Solution
Implement self-coupling cross talk compensation circuitry that adjusts image data for a target pixel by scaling and summing differences in pixel data based on the programming time of subsequently programmed pixels, using a lookup table to compensate for expected cross talk effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple display pixels share a common data line to reduce wiring complexity, then device complexity is reduced, but image artifacts occur due to self-coupling cross talk between pixels
Solution Approach 1:
The patent applies preliminary action by computing and applying compensation values to pixel data before it is written to the display pixels. The compensation circuitry calculates expected cross-talk effects based on subsequent pixel values that will be programmed, and adjusts the current pixel data in advance to counteract the anticipated interference, thereby eliminating image artifacts before they occur
Solution Approach 2:
The patent implements feedback by using pixel data from subsequently programmed rows to calculate compensation values that are fed back to adjust current pixel data. The compensation circuitry continuously monitors subsequent pixel values and uses this information to generate real-time corrections for pixels sharing the same data line, creating a closed-loop system that actively counteracts cross-talk interference
2Manufacturing precision
If pixel data is adjusted to compensate for self-coupling effects, then image quality is improved, but additional processing steps are required
Solution Approach 1:
The patent applies self-service by implementing the compensation function within the display driver circuitry itself, allowing the system to autonomously calculate and apply corrections without external intervention. The compensation circuitry uses readily available pixel data from subsequent rows to generate and apply corrections, making the system self-sufficient in eliminating its own interference problems
Solution Approach 2:
The patent implements parameter changes by modifying pixel data values dynamically based on calculated compensation factors. The compensation circuitry adjusts voltage levels or digital values of pixel data in real-time, transforming the raw pixel data into corrected values that account for anticipated cross-talk effects, thereby improving image quality through parameter transformation
Data Source
AI summary
Electronic devices, displays, and methods are provided for compensating image data to account for self-coupling by display pixels on a shared data line. An electronic display may include an electronic display panel with lines and columns of display pixels. Each column of display pixels may be coupled to a respective data line. Display driver circuitry may adjust image data associated with the display pixels to account for coupling between the display pixels and the respective data lines.