Resolution-Segmented Display Compensation for Luminance Stability
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Solution Overview
Problem
Display devices experience luminance deviation and afterimages due to pixel degradation, particularly in areas with different resolutions, leading to unstable compensation when using a single compensation method.
Innovation Solution
A display device with separate compensation factors for high and low resolution areas, utilizing a degradation compensator to generate compensation data based on stress compensation weighted values, opening ratios, and color filter thicknesses for each pixel area, adjusting driving currents accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the camera overlaps with the pixel area to minimize bezel area, then the bezel area is reduced, but the display resolution in the camera area deteriorates
Solution Approach 1:
The display area is segmented into a first pixel area with lower resolution (where the camera is disposed) and a second pixel area with higher resolution. This allows different resolution levels in different regions, enabling the camera to overlap with the display area while maintaining acceptable display quality in non-camera regions.
Solution Approach 2:
Different pixel densities are applied to different regions of the display. The first pixel area has a first number of pixels per unit area, while the second pixel area has a second number of pixels per unit area that is higher than the first number. This local differentiation optimizes both camera integration and display quality.
2Device complexity
If the same compensation method is used in areas with different resolutions, then the compensation process is simplified, but the pixel degradation compensation becomes unstable
Solution Approach 1:
Different compensation factors are applied to different pixel areas based on their resolution characteristics. The first compensation factor is used for the first pixel area with lower resolution, while the second compensation factor is used for the second pixel area with higher resolution. This ensures stable and accurate degradation compensation tailored to each region's specific characteristics.
Solution Approach 2:
The compensation process is segmented into region-specific operations. The display device applies different compensation strategies to the first pixel area and the second pixel area, allowing each region to be compensated according to its unique degradation characteristics and resolution requirements.
3Device complexity
If a single compensation factor is applied to all pixel areas, then the compensation system is simpler, but luminance deviation and afterimage effects worsen
Solution Approach 1:
Different compensation factors are applied to different pixel areas to account for their distinct characteristics. The first compensation factor addresses the specific degradation patterns in the first pixel area, while the second compensation factor addresses the second pixel area, thereby reducing luminance deviation and afterimage effects across the entire display.
Data Source
AI summary
A display device includes: a pixels unit including first pixels in a first pixel area and second pixels in a second pixel area; a degradation compensator for generating a stress compensation weighted value by accumulating image data, generating first compensation data corresponding to the first pixels, based on the stress compensation weighted value and a first compensation factor, and generating second compensation data, based on the stress compensation weighted value and a second compensation factor; and a panel driver for driving the pixel unit by reflecting the first compensation data and the second compensation data on input data from an outside.