Display Panel Optical Layer Shielding for Light Extraction and Sensing
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Solution Overview
Problem
Current display technologies face challenges in providing improved user experience and efficient light extraction while integrating display and light sensing functions, often resulting in compromised display quality and increased risk of structural reliability issues due to the introduction of optical structures.
Innovation Solution
A display panel design that includes a substrate with an array layer, a display layer of light-emitting devices, an optical layer with a first optical structure arranged between light-emitting devices, and a light-shielding member forming a light pass opening that overlaps with the optical structure, enhancing light extraction efficiency and preventing light reflection from damaging the array layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If optical structures are introduced to improve light extraction efficiency, then light extraction efficiency is improved, but structural reliability deteriorates due to increased risk of structural issues
Solution Approach 1:
A light-shielding member is introduced as an intermediary component between the optical structure and the array layer. This mediator blocks harmful light reflections from reaching the array layer while allowing the optical structure to maintain its light extraction function, thus resolving the contradiction between improving light extraction and maintaining structural reliability.
Solution Approach 2:
The light-shielding member provides preliminary protection by blocking light reflections before they can damage the array layer. This preventive measure addresses potential structural reliability issues before they occur, allowing the optical structure to be used for improving light extraction efficiency without compromising the underlying array layer.
2Adaptability or versatility
If optical structures are added to enable light sensing function, then sensing capability is improved, but device complexity increases
Solution Approach 1:
The display panel structure is designed to serve multiple functions: the display layer emits light for display purposes, while the optical structure simultaneously enables light sensing capabilities. The light-shielding member with light pass openings further supports both display and sensing functions, reducing the need for separate dedicated sensing components and thereby managing device complexity.
Solution Approach 2:
The patent combines display and light sensing functions within a single integrated structure. The optical structure serves dual purposes: improving light extraction for display and enabling ambient light sensing. The light-shielding member is integrated into this structure, creating a unified multi-functional component rather than separate additive elements.
3Measurement precision
If light pass opening is created in light-shielding member, then light sensing accuracy is improved, but display quality may be compromised due to potential light interference
Solution Approach 1:
The light-shielding member is designed with localized light pass openings at specific positions where light sensing is required, while maintaining light-shielding properties in other areas to protect display quality. This localized differentiation allows the structure to provide precise light sensing functionality without compromising overall display performance.
Solution Approach 2:
The light-shielding member is segmented into regions with different optical properties: light pass openings for sensing accuracy and light-shielding regions for display quality protection. This segmentation allows the single component to simultaneously satisfy both sensing precision requirements and display quality requirements by performing different functions in different spatial zones.
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 improves light extraction efficiency, reduces the divergence angle of light, and enhances the accuracy of light sensing detection, while also preventing potential structural reliability issues and interference from the optical structure, thereby improving the overall display and sensing performance.
Implementation Method 1
an optical layer located on a side of the display layer away from the array layer, wherein the optical layer includes a first optical structure
Implementation Method 2
a first light-shielding member located on a side of the optical layer facing the substrate, wherein the first light-shielding member forms a light pass opening
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a substrate an array layer on the substrate; a display layer located on a side of the array layer away from the substrate, wherein the display layer includes a plurality of light-emitting devices; an optical layer located on a side of the display layer away from the array layer, wherein the optical layer includes a first optical structure, and the first optical structure is arranged corresponding to intervals between the plurality of light-emitting devices; and a first light-shielding member located on a side of the optical layer facing the substrate, wherein the first light-shielding member forms a light pass opening, and the light pass opening and the first optical structure overlap each other.