Image Corrector for Display Pixel Degradation and Power Reduction
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Solution Overview
Problem
Display devices such as organic light emitting display devices and liquid crystal display devices experience performance degradation due to continuous output of images or text, leading to pixel degradation and increased power consumption.
Innovation Solution
A display device with an image corrector that moves images across display areas driven at different frequencies, using a frame data counter, speed controller, scenario determiner, and up-down scaling adjuster to adjust image movement speed, direction, and area scaling, thereby reducing pixel degradation and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a display device continuously outputs a specific image or text for a long period of time, then the display function is maintained, but pixels degrade and performance deteriorates
Solution Approach 1:
The patent implements periodic image movement at predetermined intervals to prevent pixel degradation. The image corrector moves the displayed image periodically, ensuring that no single pixel group remains in the same position continuously, thus extending pixel lifespan while maintaining display function.
Solution Approach 2:
The system dynamically adjusts image position and movement parameters based on display duration and pixel status. By making the display system dynamic rather than static, the image can be repositioned to distribute wear across different pixel groups, preventing permanent degradation in fixed positions.
2Speed
If the display device operates at high frequency, then image quality and responsiveness are improved, but power consumption increases
Solution Approach 1:
The patent applies partial image movement rather than complete frame refresh at every interval. By moving only the necessary portions of the image or using less frequent movement intervals, the system reduces power consumption while maintaining acceptable display quality and responsiveness.
Solution Approach 2:
Instead of continuous high-frequency refreshing, the system uses periodic image movement at optimized intervals. This reduces the overall power consumption by avoiding unnecessary frequent updates while still preventing pixel degradation through regular repositioning.
3Adaptability or versatility
If images move at different speeds in display areas driven at different frequencies, then each area can be optimized independently, but the image appears distorted across areas
Solution Approach 1:
The image corrector implements a universal coordinate system and movement calculation method that works across multiple display areas with different refresh frequencies. By calculating image movement based on a common reference frame and adjusting for frequency differences, the system maintains image consistency while allowing each area to operate at its optimized frequency.
Solution Approach 2:
The system dynamically adjusts movement parameters such as shift amount and timing based on the refresh frequency of each display area. By changing these parameters adaptively, the image maintains consistent appearance across areas driven at different frequencies, preventing distortion while preserving area-specific optimization.
Data Source
AI summary
A display device includes: a frame data counter configured to calculate frame information of an image displayed in a display area; a speed controller configured to determine a moving speed of the image; and a scenario determiner configured to determine a moving direction and moving amount of the image.