Under-screen Camera Display Light-shielding Layer Diffraction Control
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Solution Overview
Problem
Current display devices with under-screen cameras suffer from poor imaging quality due to diffraction caused by metal traces, which reduces the quality of the front camera module's images.
Innovation Solution
A display screen design featuring a light-shielding layer with specific openings in the under-screen camera region to prevent light diffraction, allowing external light to enter and emitted light to exit while blocking metal trace diffraction, and varying pixel density and spacing to optimize image transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal traces are used to connect pixels in the under-screen camera region, then electrical connectivity is achieved, but light diffraction occurs causing poor imaging quality
Solution Approach 1:
The patent extracts and removes the metal traces from the light path in the under-screen camera region. By eliminating the metal trace structure that causes diffraction, the harmful optical effect is removed while electrical connectivity is maintained through alternative routing or design approaches.
Solution Approach 2:
The patent introduces a light-shielding layer as an intermediary structure between the metal traces and the light path. This layer blocks or redirects light that would otherwise interact with the metal traces, preventing diffraction while allowing the electrical connections to remain intact.
2Reliability
If a light-shielding layer is added to prevent diffraction, then imaging quality improves, but device structure becomes more complex
Solution Approach 1:
The light-shielding layer is merged with existing display structure layers, such as being integrated into the pixel electrode layer or color filter layer. This combination approach adds the necessary light-blocking function without creating a completely separate structural element, thereby minimizing increased complexity.
Solution Approach 2:
The light-shielding layer serves multiple functions: it prevents light diffraction by blocking light from reaching metal traces, and it can simultaneously serve as part of the pixel electrode structure or color filter layer. This multi-functionality reduces the need for additional separate components.
3Illumination intensity
If pixel density is reduced in the first display region to accommodate camera openings, then more light can enter for under-screen camera, but display resolution decreases
Solution Approach 1:
The patent applies different pixel densities in different regions of the display: the first display region (under-screen camera area) has reduced pixel density to allow light entry, while the second display region maintains normal high pixel density for display quality. This local differentiation optimizes both camera function and display resolution in their respective areas.
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
Enhances the imaging quality of under-screen cameras by preventing light diffraction and ensuring consistent image quality across the display screen, improving user experience.
Implementation Method 1
a light-shielding layer disposed on the substrate; wherein the light-shielding layer includes at least one first opening located in a non-pixel region between neighboring pixels, and external light enters the display screen through the at least one first opening
Implementation Method 2
external light enters the display screen through the at least one first opening
Implementation Method 3
any one of the at least one second opening corresponds to at least one of the pixels, and light emitted by the at least one of the pixels enters an external side through the at least one second opening
Data Source
AI summary
The present invention provides a display screen and a display device, and the display screen includes at least one first display region and a second display region located outside the at least one first display region; the at least one first display region includes a substrate disposed in the at least one first display region and a light-shielding layer disposed on the substrate; wherein, the light-shielding layer includes at least one first opening located in a non-pixel region between neighboring pixels, and external light enters the display screen through the at least one first opening.