Flexible Display Module Layout for Under-Screen Camera Light Transmission
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Solution Overview
Problem
The light loss caused by the blocking or reflection of light from the touch functional layer and flexible display substrate reduces the amount of light collected by the under-screen camera in OLED display modules, affecting image acquisition.
Innovation Solution
The display module includes a flexible display substrate with a light-transmitting region and a main display region, where the light transmittance in the light-transmitting region is higher than in the main region, and a touch functional layer that exposes this region to minimize light blocking, combined with an anti-reflection layer and cover plates to enhance light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch functional layer is added to enable touch functionality, then ease of operation is improved, but light transmittance deteriorates due to blocking and reflection
Solution Approach 1:
The flexible display substrate is designed with different light transmittance characteristics in different regions: the light-transmitting display region has higher light transmittance to allow more light to reach the under-screen camera, while the main display region has lower light transmittance for normal display function. This local differentiation resolves the contradiction by allowing the touch functional layer to be present throughout while minimizing its impact on camera performance in specific regions.
2Productivity
If the screen-to-body ratio is increased, then productivity is improved, but light transmittance deteriorates due to reduced light transmission area
Solution Approach 1:
The display area is segmented into two functional regions: the light-transmitting display region dedicated to camera light transmission with optimized transparency, and the main display region for visual output. This segmentation allows the overall screen-to-body ratio to be increased while preserving a specific area optimized for light transmission to the under-screen camera.
3Measurement precision
If pixel density is increased in the main display region, then measurement precision is improved, but light transmittance deteriorates due to more blocking elements
Solution Approach 1:
Different pixel densities are implemented in different regions: the main display region has high pixel density for sharp visual display, while the light-transmitting display region has reduced pixel density or optimized sub-pixel structures to maximize light transmission. This local differentiation allows high resolution where needed while maintaining camera performance where light transmission is critical.
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 improves the light transmittance and enhances the image acquisition capability of the under-screen camera by reducing light loss, thereby improving the image definition collected by the optical sensor.
Implementation Method 1
an anti-reflection layer and cover plates to enhance light transmission
Data Source
AI summary
A display module includes a flexible display substrate and a touch functional layer. The flexible display substrate has a light-transmitting display region and a main display region. A light transmittance of a portion of the flexible display substrate located in the light-transmitting display region is greater than a light transmittance of a portion of the flexible display substrate located in the main display region. The touch functional layer is located on a display side of the flexible display substrate, and exposes at least part of the portion of the flexible display substrate located in the light-transmitting display region. The display module has a first region and a second region adjacent to the first region. The display module is bent towards a direction away from the display side of the flexible display substrate in the first region.