Display Panel Compensation Using Area-Level Resolution and Bit-Depth
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Solution Overview
Problem
Display devices, particularly organic light emitting display devices, suffer from luminance deviation and afterimages due to pixel deterioration, necessitating improved image quality compensation while reducing memory size to lower manufacturing costs.
Innovation Solution
A display device compensates for deterioration by receiving stress information, adjusting spatial resolution and bit-depth in specific areas based on the stress information, and storing this information in a memory to maintain a constant memory size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If stress information is stored for each pixel to compensate deterioration, then image quality is improved, but memory size increases
Solution Approach 1:
The display panel is divided into multiple areas based on stress levels, with each area having independent compensation parameters. This segmentation allows stress information to be stored at the area level rather than pixel level, significantly reducing memory requirements while maintaining compensation effectiveness
Solution Approach 2:
Different compensation parameters (spatial resolution and bit-depth) are applied to different areas of the display panel according to their specific stress levels. High stress areas receive different compensation treatment than low stress areas, optimizing image quality while minimizing memory usage by only storing necessary area-level stress information
2Manufacturing precision
If spatial resolution is increased to compensate for deterioration, then image quality is improved, but data processing complexity increases
Solution Approach 1:
The spatial resolution and bit-depth are made dynamically adjustable based on stress levels in different areas. The system can switch between different compensation modes (changing spatial resolution, changing bit-depth, or both) depending on the deterioration stage, allowing flexible adaptation without fixed complex processing requirements
Solution Approach 2:
The system changes compensation parameters (spatial resolution and bit-depth) based on deterioration stage rather than using fixed high-resolution compensation. This allows the system to adapt parameter settings to match the actual deterioration level, reducing unnecessary processing complexity while maintaining image quality
3Manufacturing precision
If bit-depth is increased to compensate for deterioration, then image quality is improved, but memory bandwidth requirement increases
Solution Approach 1:
Bit-depth compensation is applied locally to specific areas based on their stress levels rather than uniformly across the entire display. This allows the system to increase bit-depth only where necessary for compensation, reducing overall memory bandwidth requirements compared to global bit-depth increase
Data Source
AI summary
A display device includes a display panel which displays an image, where a plurality of areas, in each of which a plurality of pixels is positioned, is defined in the display panel, and a controller which generates image data based on an image signal received from the outside and compensates for deterioration of the display panel. The controller includes a stress information generator which generates stress information of the display panel corresponding to the deterioration and a deterioration compensator which changes at least one selected from a spatial resolution and a bit-depth of each of the plurality of areas based on the stress information of each of the plurality of areas.