Under-Display Camera Mask Layout for Diffraction Control
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Solution Overview
Problem
The arrangement of pixels and wirings in electronic devices with a camera device under the display causes diffraction of light, leading to reduced image quality and increased thickness due to the presence of a metal sheet, which can wrinkle and affect the appearance.
Innovation Solution
A mask layer with opaque masks is introduced in the display panel to reduce diffraction, and the metal sheet is partially removed to minimize thickness and prevent wrinkling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal sheet is disposed on the rear surface of the display to increase rigidity and shield noise, then the structural strength and noise shielding are improved, but the thickness of the electronic device increases and the appearance may deteriorate due to wrinkling
Solution Approach 1:
The patent removes the metal sheet from the rear surface of the display, extracting the component that causes thickness increase and wrinkling issues while seeking alternative solutions for rigidity and noise shielding through the camera device housing structure
Solution Approach 2:
The patent combines the noise shielding and rigidity functions into the camera device housing structure itself, merging these protective functions with the existing structural components rather than adding separate metal sheets
2Illumination intensity
If pixels and wirings are arranged at low density in the transmissive area to satisfy camera transmittance requirements, then the transmittance for the camera is improved, but diffraction occurs in light entering the camera device which deteriorates image quality
Solution Approach 1:
The patent applies different pixel and wiring arrangement strategies in different areas: the transmissive area has low-density arrangements optimized for camera light passage, while other areas maintain normal display density, creating local optimization that satisfies both transmittance and image quality requirements
Solution Approach 2:
The patent introduces a mask layer as an intermediary component between the pixels/wirings and the camera device. This mask layer with its specific pattern design controls and redirects light paths, reducing diffraction effects while maintaining the low-density arrangement needed for high transmittance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances image quality by reducing light diffraction and maintains a thinner profile while preventing display defects.
Implementation Method 1
a mask layer including an opaque mask, and the opaque mask includes a first portion at least partially formed in the field-of-view area
Implementation Method 2
pixels and/or wirings (e.g., metal) are formed in an irregular arrangement structure in the transmissive area, and thus diffraction having various frequencies may occur in light entering the camera device
Data Source
AI summary
An electronic device is provided. The electronic device includes a display and a camera device, the camera device overlaps at least a portion of an active area in a second direction of the display. The display comprises a display panel comprising a first active area, which has a first transmittance, at least partially overlaps on the camera device, and comprises a viewing angle area corresponding to the viewing angle of the camera device, and a second active area having a second transmittance that is lower than the first transmittance, the display panel comprises a mask layer comprising an opaque mask, and the opaque mask comprises a first portion at least partially formed in the viewing angle area, and a second portion formed to have a specified width and encompass the outer boundary of the viewing angle area.