Double-Layer Light-Transmitting Structure for Display Crosstalk Control
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Solution Overview
Problem
Existing light-emitting devices face challenges in balancing light-emitting intensity and resolution due to the light transmittance of packaging colloids, leading to issues like light crosstalk, reduced contrast, and brightness.
Innovation Solution
A light-emitting device is designed with a double-layer light-transmitting structure and nano coating to reduce lateral crosstalk, improve resolution, and maintain light-emitting intensity, featuring a first light-transmitting layer with lower transmittance and a second layer with higher transmittance, along with a nano coating that covers the outer surfaces and side surfaces to prevent impurity intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high light transmittance packaging colloid is used, then light-emitting intensity is improved, but light crosstalk increases and resolution decreases
Solution Approach 1:
The packaging colloid is divided into two distinct layers: a first light-transmitting layer with higher light transmittance positioned below the light-emitting chip to maximize light extraction, and a second light-transmitting layer with lower light transmittance positioned above the light-emitting chip to suppress lateral crosstalk. This segmentation allows each layer to perform its specialized function, resolving the contradiction between light-emitting intensity and resolution.
Solution Approach 2:
Different regions of the packaging structure are assigned different light transmittance properties. The lower region (first light-transmitting layer) has high light transmittance to enhance light output, while the upper region (second light-transmitting layer) has low light transmittance to reduce crosstalk. This local differentiation of material properties enables simultaneous optimization of both light-emitting intensity and resolution.
2Manufacturing precision
If low light transmittance packaging colloid is used, then resolution and contrast are improved, but light-emitting intensity decreases
Solution Approach 1:
The packaging structure is segmented into two functional layers with different light transmittance characteristics. The first light-transmitting layer (higher transmittance) ensures sufficient light-emitting intensity by efficiently extracting light from the chip, while the second light-transmitting layer (lower transmittance) ensures high resolution by suppressing lateral crosstalk. This segmentation resolves the contradiction by distributing different performance requirements to different layers.
Solution Approach 2:
The packaging colloid exhibits spatially varying light transmittance properties: the lower layer has high light transmittance to maximize light output intensity, while the upper layer has low light transmittance to maintain high resolution and contrast. This local quality differentiation allows the system to simultaneously achieve both high brightness and sharp image quality.
3Device complexity
If single-layer packaging colloid is used, then device complexity is reduced, but ability to balance light-emitting intensity and resolution is compromised
Solution Approach 1:
The packaging colloid is segmented into two layers with distinct light transmittance properties to simultaneously achieve high light-emitting intensity and high resolution. Despite this segmentation, the patent maintains relatively simple device complexity by using the same base material composition for both layers, differing only in thickness ratios, which simplifies manufacturing while achieving the desired optical performance balance.
Solution Approach 2:
The patent resolves the contradiction by changing the thickness parameter of the packaging colloid layers rather than introducing fundamentally different materials. The first light-transmitting layer has a greater thickness than the second light-transmitting layer, creating the effective light transmittance difference needed to balance intensity and resolution while keeping the overall structure simple and manufacturable.
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 configuration enhances the light-emitting device's performance by reducing crosstalk, improving resolution and contrast, and extending its service life while maintaining brightness and anti-impurity performance.
Implementation Method 1
The light transmittance of the second light-transmitting layer is greater than the light transmittance of the first light-transmitting layer. The lower surface is covered by the first light-transmitting layer, and the upper surface is covered by the second light-transmitting layer
Implementation Method 2
The nano coating covers the outer surface of the first light-transmitting layer, the outer surface of the second light-transmitting layer and the side surface of the substrate
Data Source
AI summary
The disclosure provides a light-emitting device and a displayer. Herein, the light-emitting device includes a substrate, a light-emitting chip, a first light-transmitting layer, a second light-transmitting layer and a nano coating. The light transmittance of the second light-transmitting layer is greater than the light transmittance of the first light-transmitting layer. A reference surface corresponding to the light-emitting chip is arranged above the substrate, and the reference surface is higher than the bottom surface of the light-emitting chip and not higher than the top surface of the light-emitting chip. The first light-transmitting layer covers the surface of the light-emitting chip below the reference surface, and the second light-transmitting layer covers the surface of the light-emitting chip above the reference surface. The nano coating covers the outer surface of the first light-transmitting layer, the outer surface of the second light-transmitting layer and the side surface of the substrate.