Display Panel Optical Layer Layout for Accurate Under-Screen Identification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display panels face challenges in optical identification due to small identification areas and low accuracy.
Innovation Solution
A display panel design featuring an optical identification region with a first layer and a second layer, where the first layer includes light-shielding regions and light-transmitting holes, and the second layer includes corresponding light-transmitting holes that overlap with the first layer's light-shielding regions, allowing for improved light transmission and identification accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional single-layer structure is used for optical identification, then the device complexity is low, but the identification area is small and accuracy is low
Solution Approach 1:
The patent divides the optical identification structure into multiple layers (first layer with light-shielding regions and first light-transmitting holes, second layer with second light-transmitting holes). This segmentation allows each layer to perform specific functions: the first layer blocks stray light while the second layer transmits identification light, thereby improving identification accuracy without creating an overly complex integrated structure
Solution Approach 2:
The patent transitions from a conventional single-layer planar structure to a multi-layer vertical structure. By adding the vertical dimension with stacked layers at different heights, the design enables light to pass through multiple controlled openings while blocking unwanted light paths, thus improving identification accuracy through three-dimensional spatial arrangement
2Measurement precision
If light-shielding regions are added to block stray light, then identification accuracy improves, but light transmission intensity decreases
Solution Approach 1:
The patent segments the light control function into different layers: the first layer's light-shielding regions block stray light to improve accuracy, while the first and second light-transmitting holes in subsequent layers restore and guide the identification light. This segmentation allows simultaneous achievement of light blocking for accuracy and light transmission for intensity
Solution Approach 2:
The light-transmitting holes act as intermediaries that allow identification light to pass through the light-shielding regions. The holes provide controlled light paths through otherwise blocking structures, enabling both stray light rejection and sufficient light transmission for sensor detection
3Measurement precision
If multiple layers with light-transmitting holes are stacked, then large-angle reflected light can reach the sensor improving accuracy, but the device complexity increases
Solution Approach 1:
The patent uses vertical stacking of multiple layers at different heights to create three-dimensional light paths. This vertical arrangement allows large-angle reflected light to sequentially pass through first and second light-transmitting holes in different layers, reaching the sensor while maintaining a relatively simple overall structure compared to complex lateral arrangements
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 design enhances optical identification accuracy by allowing large-angle reflected light to pass through the light-transmitting holes and reach the optical sensor, thereby improving the intensity of the light received and the overall identification process.
Implementation Method 1
The first layer has at least one first light-shielding region and includes at least one first light-transmitting hole. The second layer includes at least one second light-transmitting hole corresponding to the at least one first light-transmitting hole.
Implementation Method 2
One of the at least one first light-shielding region and one of the at least one second light-transmitting hole at least partially overlap with each other along a direction perpendicular to a plane of the display panel
Implementation Method 3
allowing large-angle reflected light to pass through the light-transmitting holes and reach the optical sensor
Data Source
AI summary
Provided are a display panel and a display device. The display panel has an optical identification region and includes a first layer and a second layer. The first layer is located at a side of the second layer close to a light-exiting side of the display panel. The first layer has at least one first light-shielding region and includes at least one first light-transmitting hole. The second layer includes at least one second light-transmitting hole corresponding to the at least one first light-transmitting hole. One of the at least one first light-shielding region and one of the at least one second light-transmitting hole at least partially overlap with each other along a direction perpendicular to a plane of the display panel.