Display Panel Light-Shielding Layout for Under-Display Camera Imaging
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Solution Overview
Problem
The improvement of the screen-to-body ratio in display electronic devices is hindered by the presence of front cameras, which restricts the integration of high pixel density display panels, and existing under-display camera solutions face challenges with light transmittance and imaging quality due to diffraction and interference from conductive patterns.
Innovation Solution
A display panel design featuring a transparent substrate, a pixel array, a circuit structure, and a light shielding portion, where the circuit structure includes conductive patterns and a light shielding portion to minimize diffraction and interference, allowing for higher light transmittance and improved imaging quality by shielding gaps between conductive patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display panel uses high pixel density to improve display quality, then the screen-to-body ratio improves, but light transmittance decreases due to more conductive patterns blocking light
Solution Approach 1:
The patent applies different pixel densities in different regions of the display panel. The first display region has a first pixel density while the second display region has a second pixel density that is lower than the first pixel density. This local variation allows the camera region to have higher light transmittance while other regions maintain high display quality.
2Illumination intensity
If the display panel uses low pixel density region to improve light transmittance for under-display camera, then imaging quality improves, but display quality decreases in that region
Solution Approach 1:
The patent divides the display panel into different regions with different pixel densities. The second display region has a lower pixel density optimized for camera light transmittance, while the first display region maintains high pixel density for display quality. This creates local optimization for both functions.
3Measurement precision
If the conductive patterns are arranged closely to reduce gap size and minimize diffraction, then imaging quality improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent introduces a light shielding portion that is arranged in a direction different from the direction in which the conductive patterns extend. This light shielding portion spans the gaps between conductive patterns and blocks diffracted light, effectively addressing the diffraction problem without requiring extremely tight spacing of the conductive patterns themselves.
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 light transmittance in the display panel, particularly in regions with lower pixel density, enabling better imaging for under-display cameras by reducing diffraction and interference, thus improving the screen-to-body ratio and overall display performance.
Implementation Method 1
the first gap causes at least a part of imaging light to be diffracted when passing through the first gap
Implementation Method 2
The light shielding portion includes a first light shielding portion... blocks the imaging light
Data Source
AI summary
Disclosed are a display panel and a display device. The display panel includes: a substrate, a pixel array including a plurality of pixel units arranged on the substrate, a circuit structure including at least two first conductive patterns and at least one second conductive pattern, and a light shielding portion including a first light shielding portion. Orthographic projections of the first conductive patterns on the substrate are separated from each other by a first gap. An orthographic projection of at least a part of the first gap on the substrate is within an orthographic projection of the first light shielding portion on the substrate and within an orthographic projection of the second conductive pattern on the substrate. The at least one second conductive pattern extends in a direction different from a direction in which the at least two first conductive patterns extend, so as to span the first conductive patterns.