Light-emitting device with integrated wire grid polarizer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal projectors require high-polarization light sources, but existing designs with separate light-emitting elements and polarizing plates increase device size and hinder uniform electric current application.
Innovation Solution
A light-emitting device with a laminated structure including a first and second semiconductor layer and a light-emitting layer, where a wire grid polarizing plate with orthogonal wire portions is integrated between the layers to polarize light and apply an electric current, reducing size and enhancing uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a separate polarizing plate is mounted away from the light-emitting element, then light polarization is achieved, but device size increases
Solution Approach 1:
The patent combines the polarizing plate with the light-emitting element into an integrated structure, where the polarizing plate is positioned adjacent to and coupled with the light-emitting element. This merging eliminates the need for separate mounting of the polarizing plate away from the light-emitting element, thereby achieving light polarization while reducing device size.
2Illumination intensity
If a separate polarizing plate is used, then polarization function is provided, but structural complexity increases
Solution Approach 1:
The polarizing plate is integrated with the light-emitting element through direct coupling or adjacent positioning, reducing the number of separate components and simplifying the overall structure. This merging approach provides the polarization function while reducing structural complexity compared to separate mounting arrangements.
3Illumination intensity
If electric current is applied through separate electrodes, then light emission is achieved, but current distribution uniformity decreases
Solution Approach 1:
The patent introduces a conductive layer as an intermediary between the electrodes and the light-emitting element. This conductive layer serves as a mediator that distributes electric current uniformly across the light-emitting element, ensuring even current distribution while maintaining effective light emission.
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 enables size reduction, efficient polarization of light, and uniform electric current application to the light-emitting layer, improving the light-emitting device's performance and efficiency.
Implementation Method 1
the conductive layer includes a plurality of wire portions extending in a direction orthogonal to a lamination direction of the laminated structure, and is configured to polarize light generated at the light-emitting layer
Data Source
AI summary
A light-emitting device includes a substrate, a laminated structure provided at the substrate, and a conductive layer provided at the laminated structure and configured to apply an electric current to the laminated structure. The laminated structure is provided between the substrate and the conductive layer, and includes a first semiconductor layer of a first conductive type, a second semiconductor layer of a second conductive type different from the first conductive type, and a light-emitting layer provided between the first semiconductor layer and the second semiconductor layer. The conductive layer includes a plurality of wire portions extending in a direction orthogonal to a lamination direction of the laminated structure, and is configured to polarize light generated at the light-emitting layer, and an electric current is applied to the light-emitting layer via the plurality of wire portions.