Under-Display Camera Luminance Compensation Across Pixel Areas
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Solution Overview
Problem
The integration of a camera in a pixel area of a display device affects the image quality due to variations in transmittance, necessitating a solution to maintain uniform luminance across different pixel areas.
Innovation Solution
A method of optical compensation is employed, involving first and second optical compensations to adjust test voltages for each gradation range, ensuring that pixels in overlapping areas with a camera emit light of target luminance, using a luminance measurement device to correct test voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a camera is disposed to overlap the pixel area to reduce bezel size, then the bezel area is reduced, but the transmittance of the overlapping area decreases affecting image quality
Solution Approach 1:
The patent applies different resolution characteristics to different areas of the display panel. The first pixel area (with camera overlap) has a lower resolution than the second pixel area, allowing the camera to function properly while maintaining overall display quality. This local differentiation resolves the contradiction by optimizing each area according to its specific requirements.
2Adaptability or versatility
If the resolution of the overlapping area is reduced to improve camera functionality, then the camera can operate properly, but the uniformity of luminance across the display decreases
Solution Approach 1:
The patent performs optical compensation by adjusting the emission characteristics of pixels in the first pixel area. By modifying the luminance output parameter of pixels in the camera-overlapping region, the system achieves uniform overall luminance while maintaining the lower resolution necessary for camera functionality.
3Stability of the object's composition
If optical compensation is performed to achieve uniform luminance, then luminance uniformity is improved, but the complexity of the manufacturing process increases
Solution Approach 1:
The patent performs optical compensation during the manufacturing process by pre-adjusting the emission characteristics of pixels in the first pixel area before the display is put into service. This preliminary action ensures uniform luminance is achieved without requiring complex post-manufacturing adjustments or additional hardware components.
Data Source
AI summary
A method for optically compensating a display device including a plurality of pixels, a first pixel area including a plurality of first pixels of the pixels, and a second pixel area including a plurality of second pixels of the pixels, includes performing, sequentially, a first optical compensation for each of a plurality of first test voltages for gradations of a first range applied to each of the pixels, and performing, sequentially, a second optical compensation for each of a plurality of second test voltages for gradations of a second range applied to a first pixel of the first pixel area.