Flat-Panel Display Data-to-Scan Coupling Error Compensation
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Solution Overview
Problem
Conventional flat-panel displays experience distorted luminance and color due to data-to-scan signal coupling, leading to artifacts such as darker and brighter lines in the output image.
Innovation Solution
The implementation of a method and device that corrects for distorted luminance and color by calculating aggressor values using spatial interpolated voltage transitions and group average voltages, and applying compensation correction voltage values through a FIFO buffer to align with the input signal frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If data-to-scan signal coupling is present in the display system, then the display can operate with standard driving circuits, but luminance and color distortion artifacts appear in the output image
Solution Approach 1:
The patent applies preliminary action by calculating compensation values in advance based on data voltage transitions and storing them in buffers before the actual display scanning process. The line subtractor computes voltage transitions between consecutive lines, and these compensation values are prepared and stored in FIFO buffers before being applied during the scanning process, thus preventing distortion artifacts before they occur.
Solution Approach 2:
The patent implements feedback by using the line subtractor to calculate the actual voltage transition between consecutive data lines and using this information to generate compensating signals. The system continuously monitors the data voltage transitions and adjusts the scan signal accordingly through the compensation adder, creating a closed-loop feedback mechanism that eliminates luminance and color distortion.
2Manufacturing precision
If data voltage transition compensation is applied to correct luminance distortion, then luminance uniformity improves, but device complexity increases due to additional circuit components
Solution Approach 1:
The patent applies segmentation by dividing the compensation process into distinct functional modules: a line subtractor for calculating voltage transitions, separate FIFO buffers for storing compensation values for different scan phases, and a compensation adder for applying the correction. This modular segmentation allows the complex compensation function to be implemented as discrete, manageable circuit blocks that can be integrated systematically.
Solution Approach 2:
The patent uses intermediary elements such as the FIFO buffers that store compensation values between the calculation stage (line subtractor) and the application stage (compensation adder). These intermediary buffers decouple the timing of compensation value generation from their application, allowing the system to manage complexity by introducing controlled intermediate storage points in the signal path.
Data Source
AI summary
An electronic display device designed to a method and device that corrects for distorted luminance and colors due to data-to-scan coupling in a flat-panel display.