Transparent Light Emitting Module With Segmented Electrodes
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Solution Overview
Problem
Existing light emitting devices face challenges in reducing light loss, improving light extraction efficiency, delaying moisture penetration, enhancing reliability, and maintaining high color purity while operating on transparent surfaces like glass.
Innovation Solution
A light emitting apparatus comprising a light transmissive layer, a base film with an electrode layer, and multiple light emitting devices, where the base film and light transmissive layer differ in refractive index, transmittance, and thermal conductivity, allowing for adjustable light paths and improved heat dissipation, and the electrode covers less than 50% of the base film to maintain transparency and reduce glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrode layer covers a large area of the base film, then current distribution is improved, but transparency is reduced and glare increases
Solution Approach 1:
The electrode layer is divided into multiple separate electrode patterns (e.g., ITO patterns) arranged in a matrix configuration, rather than using a single continuous large-area electrode. This segmentation allows current to be distributed through multiple discrete points while maintaining transparency in the spaces between electrodes, resolving the contradiction between current distribution and transparency.
Solution Approach 2:
Different regions of the device have different electrode densities and configurations. The electrode patterns are strategically positioned to provide adequate current distribution at light emitting devices while maintaining high transparency in regions where light transmission is prioritized, achieving local optimization of both current distribution and transparency.
2Reliability
If the electrode layer is made more extensive, then electrical connection is improved, but heat dissipation is reduced
Solution Approach 1:
The electrode layer is segmented into multiple discrete patterns rather than a continuous extensive layer. This segmentation maintains adequate electrical connection to multiple light emitting devices while creating air gaps and reducing overall electrode material volume, thereby improving heat dissipation through enhanced thermal pathways and reduced heat accumulation.
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 the light emitting module to display shapes and characters on transparent surfaces while maintaining transparency when not in use, reducing light loss, and improving reliability through enhanced light extraction and heat dissipation, thus enhancing visibility and stability.
Implementation Method 1
the base film and light transmissive layer differ in refractive index, transmittance, and thermal conductivity, allowing for adjustable light paths
Implementation Method 2
the base film and light transmissive layer differ in refractive index, transmittance, and thermal conductivity
Implementation Method 3
the base film and light transmissive layer differ in refractive index, transmittance, and thermal conductivity, allowing for adjustable light paths and improved heat dissipation
Data Source
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AI summary
A light emitting module is disclosed. The light emitting module includes: a light transmissive layer transmitting light; and a film disposed on at least one surface of the light transmissive layer, wherein the film comprises a plurality of light emitting devices, and the light emitting module displays at least one of shapes, characters, emoticons, or pictures through the plurality of light emitting devices while maintaining transparency when the plurality of light emitting devices is not turned on.