Common Absorption Layer for Thin Multicolor Light-Emitting Devices
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Solution Overview
Problem
Display devices with circular polarizers face an increased film thickness due to the thickness of the circular polarizer.
Innovation Solution
A light-emitting device with multiple light-emitting elements emitting different colors, each layered with a common light absorption layer on the emitting face side, which absorbs the respective colors, eliminating the need for a circular polarizer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a circular polarizer is installed on the light-emitting device, then external light reflection is prevented, but the film thickness of the device increases
Solution Approach 1:
The patent extracts and eliminates the circular polarizer component from the light-emitting device structure. By removing this separate component, the invention achieves prevention of external light reflection through the light absorption layer integrated into the device, thereby reducing the overall film thickness while maintaining the anti-reflection function
Solution Approach 2:
The invention merges the light absorption function with the device structure by providing a light absorption layer that serves both as part of the light-emitting element structure and as the anti-reflection mechanism. This integration eliminates the need for a separate circular polarizer layer, thus reducing total film thickness while preventing external light reflection
2Object-affected harmful factors
If a circular polarizer is installed on the light-emitting device, then external light reflection is prevented, but the manufacturing complexity increases
Solution Approach 1:
The invention combines the light absorption layer with the existing light-emitting element structure, eliminating the need for a separate circular polarizer component. This integration simplifies the manufacturing process by reducing the number of components and assembly steps required, while still achieving effective prevention of external light reflection
Solution Approach 2:
The light absorption layer is designed to serve multiple functions: it acts as part of the light-emitting element structure and simultaneously provides the anti-reflection function. This multi-functionality reduces the overall device complexity by eliminating the need for dedicated anti-reflection components like circular polarizers
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 configuration reduces the film thickness and improves luminous efficiency by minimizing external light reflection and enhancing viewing angle characteristics.
Implementation Method 1
the light absorption layer absorbs the light of the first color, the light of the second color, and the light of the third color
Data Source
AI summary
The light-emitting device includes a light-emitting element in which a first electrode, a light-emitting layer, and a second electrode are sequentially layered toward a light-emitting face side. The plurality of light-emitting elements include a first light-emitting element configured to emit light of a first color, a second light-emitting element configured to emit light of a second color different from the first color, and a third light-emitting element configured to emit light of a third color different from the first color and the second color. The light-emitting device includes a light absorption layer on the light-emitting face side of the second electrode, in plane view, in common at positions where the light absorption layer is superimposed on the plurality of light-emitting elements, and the light absorption layer absorbs the light of the first color, the light of the second color, and the light of the third color.