Stepped Display Substrate for Under-Panel Camera Transmittance
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Solution Overview
Problem
The integration of a camera into display devices, such as organic light-emitting displays, often results in a thicker device due to the need for a bezel outside the display panel, leading to reduced transmittance and visual differences in the camera region.
Innovation Solution
A display device configuration where the camera is positioned beneath the substrate, with a stepped section formed by removing a portion of the substrate's thickness in the camera region, allowing for subpixels and an optical film to cover both regions, thereby reducing the bezel size and enhancing transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the camera is installed in the bezel outside the display panel, then the camera can be positioned separately from the display panel, but the width and thickness of the bezel must be increased, leading to a thicker device and decreased visual sensation
Solution Approach 1:
The camera module is merged with the display panel by positioning the camera beneath the panel and integrating it into the same structural assembly. The camera lens protrudes through a hole in the front surface of the display panel, allowing the camera to be part of the display panel itself rather than a separate bezel component. This merging eliminates the need for a thick external bezel while maintaining camera functionality.
Solution Approach 2:
The camera is repositioned from a lateral arrangement in the bezel to a vertical arrangement beneath the display panel. By moving the camera to another dimension (beneath the panel rather than outside the panel edges), the design achieves a thinner overall profile while still accommodating the camera lens protrusion.
2Adaptability or versatility
If the camera is installed in the bezel outside the display panel, then the camera module can be independently configured, but the device thickness increases and transmittance decreases
Solution Approach 1:
The camera module is integrated into the display panel structure, with the camera positioned beneath the panel and the lens protruding through the front surface. This merging allows the camera to share the same optical path and structural space as the display, improving light transmittance by eliminating the need for light to pass through a thick bezel while maintaining independent camera module configuration.
3Length of stationary object
If the camera is provided beneath the substrate, then the device can be thinner and transmittance improved, but visual differences and camera visibility when turned off may occur
Solution Approach 1:
The display panel is divided into different regions: a first region corresponding to the camera area with higher transmittance to allow camera operation, and a second region with normal display characteristics. This local differentiation in optical properties allows the camera to be positioned beneath the substrate with improved transmittance while managing visibility concerns through selective transparency in the camera region.
Data Source
AI summary
Discussed is a display device including a substrate including a first region and a second region surrounding the first region, a plurality of first subpixels on the first region of the substrate, and a plurality of second subpixels on the second region of the substrate. The first region includes a transmission portion adjacent to the plurality of first subpixels. Each of the first and second subpixels includes a first electrode, a first common layer, an organic emission layer, a second common layer, and a second electrode stacked in order. The first and second common layers are located in succession in the first and second subpixels.