Under-Display Camera Pixel Layout for Transmittance and Luminance
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Solution Overview
Problem
Existing display devices face challenges in improving the transmittance of the camera area while arranging the camera to overlap the display area inside the display panel, which also affects high luminance at low resolution.
Innovation Solution
A display device design that includes a substrate with an optical device such as a camera located under the substrate in the display area, and a subpixel layer with transistors of different characteristics over the substrate. The first area overlapping with the optical device uses transparent polyimide and oxide transistors for high transmittance, while the second area uses color polyimide and LTPS transistors for high luminance and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the camera is disposed to overlap the display area inside the display panel, then the design complexity is reduced and the display area is maximized, but the transmittance of the camera area deteriorates and high luminance at low resolution becomes difficult to implement
Solution Approach 1:
The patent applies local quality by differentiating the transistor characteristics in different regions of the display panel. Specifically, oxide transistors with high transmittance characteristics are used in the first area where the camera overlaps, while LTPS transistors with high luminance characteristics are used in the second area. This regional differentiation allows each area to optimize its performance for its specific function, resolving the contradiction between maximizing display area and maintaining camera transmittance.
2Device complexity
If the camera is disposed to overlap the display area inside the display panel, then the design complexity is reduced and the display area is maximized, but high luminance at low resolution becomes difficult to implement
Solution Approach 1:
The patent implements local quality by assigning different transistor types to different regions: LTPS transistors in the second area (non-camera region) provide high luminance performance, while oxide transistors in the first area (camera region) provide high transmittance. This allows the display to achieve high luminance in the display area while maintaining high transmittance in the camera area, even when the camera overlaps the display area at low resolution.
3Reliability
If a large bezel is used for installation and exposure of the optical device, then the optical device can be properly installed and exposed, but the size of the display panel increases
Solution Approach 1:
The patent merges the camera area with the display area by allowing the camera to overlap the display area internally. This integration eliminates the need for a separate bezel region for camera installation, as the camera is positioned within the display area itself. The internal overlap design combines the optical device exposure function with the display function, reducing the overall panel size while maintaining proper optical device installation and exposure.
4Reliability
If the display panel is cut out in a notch shape for camera exposure, then the camera can be exposed, but the design quality deteriorates due to poor aesthetics
Solution Approach 1:
The patent merges the camera exposure function with the display area by positioning the camera internally within the display area. This internal overlap design eliminates the need for external notches or cutouts, as the camera is integrated within the display region. The seamless integration maintains the完整性 and aesthetics of the display surface while ensuring proper camera exposure, thereby preserving design quality.
Data Source
AI summary
Embodiments of the present disclosure relate to a display device including a substrate, an optical device located under the substrate in a display area, and a subpixel layer located over the substrate in the display area, wherein the subpixel layer includes at least one of first transistor with a first characteristic are located at a first area overlapping with the optical device, and at least one of second transistor with a second characteristic are located at a second area not overlapping with the optical device.