Reflective Plate Layout for Micro-LED Black Reflection Control
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Solution Overview
Problem
Micro-LED display devices face challenges in optimizing light efficiency and reflectance while maintaining good black reflection visibility, particularly due to the use of high reflectance reflective plates that can deteriorate black reflection visibility.
Innovation Solution
A reflective plate structure with distinct areas of different reflectance levels is employed, where a first reflective area has higher reflectance than a second area, with light-emitting elements positioned to overlap the higher reflectance area, optimizing light efficiency and reflectance while improving black reflection visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a reflective plate with high reflectance is disposed in a larger area to increase light efficiency, then light efficiency is improved, but black reflection visibility is deteriorated
Solution Approach 1:
The reflective plate is divided into different regions with different reflectance characteristics. The first region has high reflectance to improve light efficiency, while the second region has low reflectance to maintain black reflection visibility. This local differentiation allows each region to serve its specific function without compromising the other.
Solution Approach 2:
The reflective plate is segmented into multiple functional zones based on the position and light efficiency requirements of different light-emitting elements. By segmenting the plate, the patent optimizes light reflection for each element while controlling overall reflectance to prevent black reflection issues.
2Manufacturing precision
If the reflective plate area is increased to accommodate alignment margin during transfer process, then transfer precision is improved, but average reflectance increases causing black reflection visibility deterioration
Solution Approach 1:
Different regions of the reflective plate are assigned different reflectance levels based on their functional requirements. Regions requiring alignment margin have appropriate reflectance, while other regions are optimized for light efficiency, preventing overall black reflection visibility deterioration.
3Use of energy by moving object
If high reflectance is used to improve light efficiency, then light efficiency is improved, but power consumption increases
Solution Approach 1:
The reflective plate uses high reflectance only in regions where light-emitting elements are positioned, maximizing light efficiency where needed. Other regions use lower reflectance materials, reducing overall power consumption while maintaining display performance.
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
This approach enhances light efficiency and reflectance while reducing average reflectance, improving black reflection visibility and power consumption, and allows for eco-friendly recycling through the use of a uni-material reflective plate.
Implementation Method 1
a reflective plate having high reflectance that may reflect light from the micro-LED element as efficiently as possible may be disposed
Data Source
AI summary
Disclosed are a display panel and a display device in which one reflective plate has different areas with different light reflectance, such that an average reflectance of the reflective plate is lowered, while a light-emitting element is positioned in an area corresponding to a relatively high reflectance area, so that black reflection visibility can be improved while light efficiency and light reflectance can be optimized. The display panel includes a substrate; a reflective plate disposed on the substrate; and a light-emitting element disposed on the reflective plate, wherein the reflective plate includes a first reflective area and a second reflective area, wherein the first reflective area has a reflectance of light of a wavelength of 550 nm greater than a reflectance of light of a wavelength of 550 nm of the second reflective area, wherein at least a partial area of the light-emitting element overlaps the first reflective area.