Variable Transmittance Polarizer for Under-Screen Camera Imaging
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Solution Overview
Problem
In OLED display devices with under-screen cameras, conventional polarizers reduce ambient light reflection but also weaken the light intensity entering the camera, affecting imaging quality due to their uniform light transmittance properties.
Innovation Solution
A polarizer with a polarizing layer comprising a first region of higher light transmittance (60-90%) and a second region of lower light transmittance (35-55%), where the ratio of transmittance between the two regions is 1.1:1 to 2.6:1, achieved through secondary treatments such as high-temperature and humidity, photocatalysis, or reagent application, to enhance light transmission for the camera while maintaining polarization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional polarizer with uniform light transmittance is used, then ambient light reflection is reduced and polarization function is maintained, but light intensity entering the under-screen camera is weakened and imaging quality deteriorates
Solution Approach 1:
The polarizing layer is designed with different light transmittance in different regions: a first region with higher light transmittance (60-90%) positioned at the camera area and a second region with lower light transmittance (35-55%) positioned at the display area. This local differentiation allows the camera region to receive sufficient light while the display region maintains effective polarization and ambient light rejection.
Solution Approach 2:
The polarizing layer is segmented into distinct functional regions with different optical properties. The first polarizing region serves the under-screen camera with high transmittance, while the second polarizing region serves the display area with lower transmittance for better polarization performance. This segmentation resolves the contradiction by assigning different transmittance characteristics to different functional zones.
2Illumination intensity
If a polarizer with higher light transmittance is used to improve camera imaging, then light intensity entering the camera is increased, but polarization function and ambient light rejection are weakened
Solution Approach 1:
Different regions of the polarizing layer are assigned different transmittance levels to simultaneously satisfy camera lighting requirements and polarization performance requirements. The first region (camera area) has high transmittance (60-90%) to improve imaging, while the second region (display area) has lower transmittance (35-55%) to maintain effective ambient light rejection.
3Area of stationary object
If the screen ratio is increased by removing or reducing polarizer components, then display area is expanded, but under-screen camera imaging quality deteriorates due to insufficient light transmission
Solution Approach 1:
The polarizing layer maintains its polarization function while creating a first region with enhanced light transmittance (60-90%) specifically at the camera position. This allows the polarizer to be retained in the display area for ambient light rejection while providing sufficient light transmission to the under-screen camera through the high-transmittance region.
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 polarizer effectively balances light transmittance and polarization, improving the imaging quality of under-screen cameras by allowing more light to enter while reducing ambient light reflection, thus enabling a higher screen ratio in display devices.
Implementation Method 1
a polarizing layer (1); wherein the polarizing layer (1) comprises a first polarizing region (11) and a second polarizing region (12); and a light transmittance of the first polarizing region (11) is greater than a light transmittance of the second polarizing region (12)
Implementation Method 2
treating the polarizing layer to be treated to obtain a treated polarizing layer
Implementation Method 3
the treatment humidity is greater than or equal to 70%
Implementation Method 4
providing a mask plate with an opening corresponding to the first polarizing region, attaching the mask plate on at least one side of the polarizing layer to be treated
Data Source
AI summary
A polarizer and a manufacturing method thereof, a display panel, and a display device are provided. The polarizer includes a polarizing layer, and the polarizing layer includes a first polarizing region and a second polarizing region. A light transmittance of the first polarizing region is greater than a light transmittance of the second polarizing region, and a ratio of the light transmittance of the first polarizing region to the light transmittance of the second polarizing region is 1.1:1 to 2.6:1.