High-Transmission Display Panel for Under-Display Cameras
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Solution Overview
Problem
Existing display devices face challenges in implementing full-screen displays due to the integration of optical devices like cameras and sensors, which necessitate reducing the display area and degrade light transmittance and performance.
Innovation Solution
A display panel design with high-transmission areas and low-resolution pixels in specific areas to accommodate optical devices, combined with a polarizing plate featuring a light-transmitting pattern to enhance light transmittance and a structure that includes anti-reflection layers to reduce light diffusion and reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If pixels are disposed in the image area to enable full-screen display, then the display area is increased, but light transmittance is lowered and camera performance is degraded
Solution Approach 1:
The patent applies local quality by creating a high-transmission area within the substrate at the specific position corresponding to the light-transmitting pattern, where the substrate is removed and filled with transparent resin to achieve higher light transmittance (greater than 90%) compared to the remaining substrate areas. This localized modification allows the image area to function both as a display region and as a light-transmitting region for the camera module.
2Reliability
If optical devices are exposed through the display panel to enable camera functionality, then camera performance is improved, but the display area is reduced
Solution Approach 1:
The patent merges the display function and camera function by positioning the camera module at the back of the display panel with its lens facing the image area, and creating a light-transmitting pattern in the polarizing plate that aligns with the image area. This allows the same physical space to serve dual purposes: displaying images when the display function is active and transmitting light to the camera when the camera function is active.
Solution Approach 2:
The patent utilizes the third dimension (depth) by positioning the camera module at the back of the display panel rather than cutting out a hole in the front surface. The light-transmitting pattern in the polarizing plate and the high-transmission area in the substrate create a vertical light path that allows the camera to capture images through the display panel, effectively using the z-axis to resolve the conflict between display area and camera functionality.
3Illumination intensity
If a light-transmitting pattern is created in the polarizing plate to enhance light transmittance, then camera performance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent changes the physical and chemical parameters of the polarizing plate by forming a light-transmitting pattern through laser irradiation, which selectively removes or modifies the polarizing material in specific regions. This process transforms the polarizing plate from a uniform structure to a patterned structure with varying light transmission properties, enabling enhanced light transmittance in the image area while maintaining the polarizing function in other 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
Enables full-screen display by maintaining high light transmittance and improving camera performance without compromising image quality, allowing for effective light transmission to optical devices.
Implementation Method 1
a substrate having a first area in which first pixels are disposed and a second area in which second pixels and a light-transmitting area disposed between the second pixels are disposed
Implementation Method 2
a polarizing plate disposed above the light-transmitting area and including a light-transmitting pattern having a light transmittance higher than that of the remaining area
Implementation Method 3
a structure that includes anti-reflection layers to reduce light diffusion and reflection
Data Source
AI summary
A display panel includes a substrate having a first area in which first pixels are disposed and a second area in which second pixels and a light-transmitting area disposed between the second pixels are disposed, and a polarizing plate disposed above the light-transmitting area and including a light-transmitting pattern having a light transmittance higher than that of the remaining area, wherein the substrate includes a high-transmission area having a higher light transmittance than the remaining portion in a position corresponding to the second area.