OLED Display Image Shift Orbit Expansion
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Solution Overview
Problem
Existing OLED display devices face limitations in image sticking improvement due to restricted maximum shift amounts and fixed shift orbit shapes, which hinder effective dispersion of cumulative stress and image quality.
Innovation Solution
An OLED display device with an image processor that independently determines pixel shift amounts in horizontal and vertical directions within a maximum shift range, allowing for expansion and shape change of the image shift orbit, and applies these shifts to improve image sticking by dispersing cumulative stress more effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rectangular shift method or diamond shift method is used with fixed shift orbit, then the image frame can be shifted by one pixel in predetermined directions, but the maximum shift amount is limited and the shift path is constrained, resulting in decreased cumulative stress dispersion capability and image sticking improvement capability
Solution Approach 1:
The patent applies dynamics by making the shift orbit adjustable and adaptable rather than fixed. The image processing unit dynamically determines shift amounts in horizontal and vertical directions based on maximum shift ranges, allowing the shift orbit to change shape and size according to different display scenarios, thereby improving image sticking prevention without being constrained by predetermined fixed patterns
Solution Approach 2:
The patent changes parameters by independently adjusting shift amounts in horizontal and vertical directions within defined maximum ranges. Instead of using fixed shift patterns, the system varies the shift parameters (horizontal shift amount, vertical shift amount) to create flexible shift orbits that can be optimized for different image content and display conditions, enhancing stress dispersion capability
2Reliability
If the image frame is shifted along a predetermined shift orbit with fixed shape, then the shifting operation is simple, but the shift path is limited and cannot effectively disperse cumulative stress across all pixels, reducing image sticking improvement capability
Solution Approach 1:
The patent segments the shift operation into independent horizontal and vertical components. The image processing unit separately determines the shift amount in the horizontal direction and the shift amount in the vertical direction, allowing each dimension to be optimized independently within its maximum range. This segmentation enables flexible combination of shift amounts to create diverse shift orbits while maintaining manageable control complexity
Solution Approach 2:
The system dynamically adjusts the shift orbit based on independently determined horizontal and vertical shift amounts. Rather than following a fixed predetermined path, the shift orbit adapts to different display scenarios by varying the combination of horizontal and vertical shifts, maximizing stress dispersion capability while using programmable control logic
Data Source
AI summary
Disclosed herein is an organic light emitting diode (OLED) display device capable of improving image sticking improvement capability by expanding an image shift orbit or changing the shape of an image shift orbit using a maximum shift range. An image processor of an OLED display device independently determines a pixel shift amount in a horizontal direction and a pixel shift amount in a vertical direction in consideration of a maximum shift range in each of the horizontal and vertical directions, simultaneously applies the determined pixel shift amounts in the horizontal and vertical directions to shift a source image, and outputs the shifted image.