Display Apparatus Low-Reflection Layer and Reflection Control
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Solution Overview
Problem
Conventional display apparatuses suffer from reduced visibility due to external light reflection, which affects the quality of the displayed images.
Innovation Solution
A display apparatus is designed with a low-reflection layer and a reflection control layer, including inorganic materials and dyes, to minimize light reflection. The apparatus features a substrate with light-emitting devices emitting different wavelengths, a color filter layer, and a reflection control layer strategically positioned to reduce external light reflection, enhancing visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional display apparatus structure is used, then the device is simple and easy to manufacture, but external light reflection reduces visibility
Solution Approach 1:
The anti-reflection function is segmented into multiple specialized layers: a low-reflection layer with specific refractive index (1.3-1.7) to minimize surface reflection, a color filter layer to manage color transmission, and a reflection control layer with dye/pigment to absorb remaining reflections. Each layer addresses a specific aspect of light interaction, collectively solving the visibility problem without requiring complete structural redesign.
Solution Approach 2:
The low-reflection layer acts as an intermediary between the light-emitting device and the external environment. With its specific refractive index (1.3-1.7), it serves as a transition medium that reduces the abrupt refractive index difference between the display structure and air, thereby minimizing external light reflection and improving visibility without significantly increasing overall device complexity.
2Object-affected harmful factors
If multiple layers are added to reduce reflection, then visibility improves, but device thickness and manufacturing complexity increase
Solution Approach 1:
The patent employs thin-film structures for the low-reflection layer, color filter layer, and reflection control layer. These thin films collectively provide comprehensive anti-reflection functionality while maintaining minimal additional thickness. The use of thin-film technology allows multiple functional layers to be stacked without proportionally increasing overall device thickness, thus improving visibility while controlling the increase in device dimensions.
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 reduces external light reflection, improving the display's visibility and maintaining high luminance and low power consumption, thus enhancing the overall display quality.
Implementation Method 1
a low-reflection layer on the first light-emitting device, the second light-emitting device, and the third light-emitting device, the low-reflection layer including an inorganic material
Implementation Method 2
a color filter layer on the low-reflection layer and configured to transmit light in a first wavelength region corresponding to the second light-emitting device
Implementation Method 3
a reflection control layer on the color filter layer and including a dye, a pigment, or a combination thereof
Data Source
AI summary
A display apparatus includes: a substrate; a first light-emitting device, a second light-emitting device, and a third light-emitting device on the substrate and having respective emission areas, the first light-emitting device, the second light-emitting device, and the third light-emitting device being configured to emit light having different wavelengths from each other; a low-reflection layer on the first light-emitting device, the second light-emitting device, and the third light-emitting device, the low-reflection layer including an inorganic material; a color filter layer on the low-reflection layer and configured to transmit light in a first wavelength region corresponding to the second light-emitting device; and a reflection control layer on the color filter layer and including a dye, a pigment, or a combination thereof.