Under-Display Camera See-Through Area With Moisture Barrier Layout
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Solution Overview
Problem
Display devices face challenges in reducing the non-pixel area while maintaining image capturing quality due to moisture permeation issues when a see-through area is formed for cameras, which can degrade image quality and increase the risk of defects.
Innovation Solution
A display device structure is implemented with a camera see-through area within the pixel area, featuring a routing area for data and scan lines, and a multi-layer encapsulation system using inorganic layers to prevent moisture permeation, along with a translucent cathode and absence of sub-pixels in the see-through area to enhance transmittance and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a through hole is formed in the display device to improve transmittance of the camera see-through area, then the transmittance is improved, but moisture may be permeated into the pixel causing defects
Solution Approach 1:
The patent introduces an encapsulation structure as an intermediary between the camera see-through area and the pixel area. This encapsulation layer acts as a mediator that allows light to pass through while blocking moisture from reaching the pixel area, thus resolving the contradiction between improving transmittance and preventing moisture permeation.
Solution Approach 2:
The patent employs thin film encapsulation layers that are transparent to light but impermeable to moisture. These thin films are integrated into the display structure to provide moisture barrier functionality without significantly affecting the optical transmittance of the camera see-through area.
2Area of stationary object
If the see-through area for camera overlaps the pixel area, then the non-pixel area is reduced, but the image capturing quality is degraded
Solution Approach 1:
The patent applies local quality by creating a camera see-through area with specific local characteristics within the pixel area. This region is optimized for optical transmittance and camera functionality, while maintaining the overall pixel structure. The local modification allows the camera to capture images through the display without significantly reducing the total pixel area.
3Measurement precision
If the camera see-through area is maximized for better image capture, then image capturing quality is improved, but moisture permeation risk increases
Solution Approach 1:
The patent addresses the moisture permeation issue by adding a vertical dimension solution - an encapsulation layer structure - rather than reducing the horizontal area of the camera see-through region. This allows the camera see-through area to be maximized in the plane while the encapsulation layers provide moisture protection in the vertical dimension.
Data Source
AI summary
A display device includes a camera see-through area which includes a camera module disposed therein; a routing area which is disposed in the vicinity of the camera see-through area and is bypassed by at least one data line and scan line; and a pixel area which includes the camera see-through area and the routing area and includes a plurality of sub-pixels including an organic light emitting diode and a cathode disposed therein.