Under-Display Camera Transistor 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 integrating the camera within the display panel, which also affects the implementation of 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 display area, featuring a subpixel layer with first and second transistors of different characteristics, where the first area overlapping with the camera has a higher transmittance achieved through the use of transparent polyimide and a lower subpixel density, and the second area has a higher subpixel density for improved display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the camera is disposed so as to overlap the display area, then the display area is maximized, but it is difficult to improve the transmittance of the camera area and implement high luminance at low resolution
Solution Approach 1:
The patent applies local quality by differentiating the structure between the first area (camera overlap region) and second area (non-camera region). In the first area, the light emitting layer is configured to emit light with wavelength outside the sensitive range of the camera sensor, effectively reducing interference while maintaining display functionality. This localized structural differentiation resolves the contradiction by optimizing each region for its specific function.
Solution Approach 2:
The patent changes the wavelength parameter of the light emitted in the camera overlap area. By configuring the light emitting layer to emit light with wavelength outside the camera sensor's sensitive range (e.g., using different phosphor materials or LED wavelengths), the patent achieves both high transmittance for the camera and functional display capability, resolving the transmittance-luminance contradiction.
2Area of stationary object
If the camera is disposed so as to overlap the display area, then the display area is maximized, but it is difficult to implement high luminance at low resolution
Solution Approach 1:
The patent applies local quality by implementing different subpixel configurations in different areas. The first area (camera overlap) uses a simplified structure with fewer subpixels per unit area, while the second area uses a denser subpixel arrangement. This allows the overall display area to be maximized while maintaining acceptable resolution in non-camera regions.
3Reliability
If a large bezel is used for installation and exposure of the optical device, then the optical device can be properly installed, but the size of the display panel increases
Solution Approach 1:
The patent merges the camera and display functions by positioning the camera to overlap with the display area. The camera is integrated within the active display region rather than being placed in a separate bezel area, allowing the display panel to achieve full-screen coverage while the camera remains properly installed and functional.
Solution Approach 2:
The patent transitions from a planar bezel arrangement to a three-dimensional overlapping configuration. By stacking the camera and display layers in the vertical dimension with optical alignment, the patent eliminates the need for lateral bezel space, reducing the overall display panel size while maintaining proper camera installation.
4Reliability
If the display panel is cut out in a notch shape for camera exposure, then the camera can be exposed, but it induces a poor design
Solution Approach 1:
The patent merges the camera and display areas by positioning the camera to overlap with the display region. This integration eliminates the need for notched or punched-hole designs, maintaining a clean, continuous display surface while ensuring proper camera exposure through the overlapping region.
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.