Screen Display Correction via Sequential Channel Feedback
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Solution Overview
Problem
Existing methods for correcting screen display luminance and color temperature in PDPs and LCDs suffer from low accuracy and slow correction speed due to the independent adjustment of R, G, and B channel parameters.
Innovation Solution
A method utilizing negative feedback to iteratively correct the G, B, and R channel values based on measured luminance and color temperature differences, ensuring target values are met by adjusting each channel separately and using threshold comparisons for accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If simultaneous correlation correction of R, G, and B channel parameters is used, then correction comprehensiveness is improved, but correction accuracy and speed deteriorate
Solution Approach 1:
The patent segments the correction process into three independent sequential steps: first correcting luminance using G channel, then correcting color temperature y-coordinate using B channel, and finally correcting color temperature x-coordinate using R channel. This segmentation allows each parameter to be corrected independently without mutual interference, thereby improving correction accuracy while maintaining comprehensiveness.
Solution Approach 2:
The patent implements a dynamic correction process where the correction sequence and parameters are adjusted based on real-time measurement results. The system dynamically determines whether further correction is needed by comparing measured values with target values, and adjusts the correction magnitude accordingly, enabling adaptive optimization of correction accuracy and speed.
2Adaptability or versatility
If simultaneous correlation correction of R, G, and B channel parameters is used, then correction comprehensiveness is improved, but correction speed deteriorates
Solution Approach 1:
By dividing the correction into three separate sequential operations (luminance correction with G channel, color temperature y-coordinate correction with B channel, and color temperature x-coordinate correction with R channel), the system eliminates the computational complexity and iterative adjustments required in simultaneous correction, thereby significantly improving correction speed while maintaining comprehensive correction coverage.
Solution Approach 2:
The patent performs preliminary measurement of current luminance and color temperature values before correction, and calculates the exact correction amounts needed in advance. This preliminary action allows the system to directly apply the calculated correction values without iterative trial-and-error, thereby accelerating the correction process while ensuring comprehensive parameter adjustment.
3Manufacturing precision
If one parameter is adjusted, then that parameter correction is improved, but other parameters change causing re-correction needs
Solution Approach 1:
The patent assigns specific correction responsibilities to specific channels: G channel exclusively for luminance, B channel exclusively for color temperature y-coordinate, and R channel exclusively for color temperature x-coordinate. This segmentation creates independent correction pathways where adjusting one parameter does not affect others, eliminating the need for re-correction while maintaining comprehensive coverage through sequential execution of all three corrections.
Data Source
AI summary
The invention discloses a method for correcting screen display based on negative feedback. Correction of the G channel value, the B channel value and the R channel value in turn is marked as a correction of the working parameters of the screen. Measuring if the luminance, color temperature y-axis coordinate and color temperature x-axis coordinate of the screen display simultaneously reach the corresponding target values after correcting the working parameters for one time; if yes, the current gray scale correction is ended; otherwise, correcting the working parameters of the current gray scale again by starting from correction of the G channel value. The R channel value, the G channel value and the B channel value are corrected in a separate manner based on the feedback, and the correction process is simplified, such that the accuracy of a single correction is higher and the correction speed is improved.