Display Afterimage Controller Convolution Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face issues with current-voltage characteristics changes and increased current consumption due to high output luminance in previous frames, leading to afterimages and inefficient power usage.
Innovation Solution
A method and system for a display device that includes a data accumulator, a data receiver, and an afterimage controller performing a convolution operation between a filter based on previous frame data and current frame data to correct current values, reducing power consumption and afterimage recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high output luminance is displayed in a previous frame, then the current consumption increases for the current frame, but this causes visual afterimages and reduces display quality
Solution Approach 1:
The patent applies preliminary action by accumulating previous frame data and performing convolution operations before the current frame is displayed. The afterimage controller pre-calculates correction values based on historical luminance data and applies them to compensate for transistor characteristics changes before the actual display occurs, thereby preventing afterimage effects and reducing unnecessary current consumption.
Solution Approach 2:
The patent implements feedback by continuously monitoring previous frame data and using convolution operations to generate correction values that are fed back to adjust the current frame's current values. This closed-loop control system uses the filter (accumulating previous frame data) to dynamically adjust current consumption based on historical luminance patterns, eliminating afterimages while optimizing power usage.
2Power
If high current consumption occurs in the current frame due to previous frame luminance, then the driving transistor characteristics change, but this leads to afterimage formation
Solution Approach 1:
The system performs preliminary compensation by accumulating previous frame grayscale data and calculating correction values before the current frame display. The afterimage controller pre-adjusts the current values for the current frame based on historical data convolution, compensating for transistor characteristics changes before they cause afterimage effects.
Solution Approach 2:
The patent uses feedback control by continuously analyzing previous frame luminance patterns and feeding correction values back to adjust current frame current values. The filter accumulates historical data and generates real-time compensation signals that counteract the harmful effects of current consumption-induced transistor characteristics changes, thereby preventing afterimage formation.
3Measurement precision
If the filter size (number of previous frames) increases, then the correction accuracy improves, but the first correction period becomes longer
Solution Approach 1:
The patent applies dynamics by making the filter adaptable to different correction scenarios. The system dynamically adjusts the convolution operation parameters and correction application timing based on the accumulated previous frame data patterns. This allows the filter to achieve high correction accuracy while managing the correction period length through adaptive parameter adjustment rather than fixed-size constraints.
Solution Approach 2:
The system utilizes parameter changes by adjusting the convolution operation parameters and correction values based on the filter's accumulated data. The afterimage controller modifies correction parameters dynamically to balance accuracy and timing, allowing the filter to maintain high precision while optimizing the correction period duration through parameter optimization.
Data Source
AI summary
A display device of the present disclosure comprises pixels arranged in a display, a data accumulator for accumulating first image data for an N-th frame output through the display, a data receiver for receiving second image data for an (N+1)th frame to be output through the display, and an afterimage controller for correcting a current value corresponding to a grayscale value of the second image data through a convolution operation between a filter, which is set based on the first image data, and the second image data.