Display Optical Functional Layer for Low Reflection and Light Recycling
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Solution Overview
Problem
Existing display apparatuses face challenges in minimizing external light reflection while maintaining high light efficiency, often requiring complex manufacturing processes due to increased mask usage for blocking reflection.
Innovation Solution
A display apparatus comprising a substrate with multiple light-emitting devices, color conversion layers, a transmissive layer, a reflective metal layer, and a light-absorbing layer, featuring a reflective metal layer with high reflectance and a light-absorbing layer with specific metal components, along with optical functional layers that include phase assistant layers and openings for improved light recycling and reduced reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a structure for blocking reflection of external light is applied, then external light reflection is minimized, but light efficiency is reduced
Solution Approach 1:
The optical functional layer is segmented into multiple distinct layers: a light-absorbing layer for blocking external light reflection, a reflective metal layer for reflecting internal light, and a phase assistant layer for phase adjustment. This segmentation allows each layer to perform its specific function optimally without interfering with the others, resolving the contradiction between blocking external light and maintaining internal light efficiency
Solution Approach 2:
Different regions of the optical functional layer have different optical properties tailored to local needs. The light-absorbing layer has high absorption coefficient to block external light, while the reflective metal layer has high reflectance to redirect internal light. This local differentiation of optical properties allows simultaneous achievement of external light blocking and internal light efficiency
2Object-affected harmful factors
If a structure for blocking reflection of external light is applied, then external light reflection is minimized, but manufacturing process becomes complicated
Solution Approach 1:
Multiple functional layers (light-absorbing layer, reflective metal layer, phase assistant layer) are merged into a single integrated optical functional layer structure. This consolidation achieves complex optical functions (light absorption, reflection, and phase adjustment) through a unified layer system, simplifying the manufacturing process compared to implementing separate structures for each function
Solution Approach 2:
The optical functional layer serves multiple functions simultaneously: blocking external light reflection, reflecting internal light, and adjusting light phase. This multi-functionality is achieved through a single integrated layer structure, eliminating the need for multiple separate components and reducing manufacturing complexity
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 effectively minimizes external light reflection and enhances light efficiency through internal light recycling, simplifying the manufacturing process by reducing the need for additional masks and improving color purity and visibility.
Implementation Method 1
a reflective metal layer and a light-absorbing layer, the light-absorbing layer being located on the reflective metal layer
Implementation Method 2
the light-absorbing layer may include a metal having an absorption coefficient
Data Source
AI summary
A display apparatus includes: a first light-emitting device, a second light-emitting device, and a third light-emitting device, on a substrate; a first color conversion layer and a second color conversion layer respectively on the first light-emitting device and the second light-emitting device; a transmissive layer on the third light-emitting device; and an optical functional layer on the first color conversion layer, the second color conversion layer, and the transmissive layer, and comprising a reflective metal layer and a light-absorbing layer, the light-absorbing layer being on the reflective metal layer, wherein the optical functional layer comprises a plurality of openings respectively corresponding to a first emission area of the first light-emitting device, a second emission area of the second light-emitting device, and a third emission area of the third light-emitting device.