Optoelectronic Device With Segmented Walls For High Luminance And Heat Dissipation
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Solution Overview
Problem
Optoelectronic devices with three-dimensional light-emitting diodes face challenges in achieving high luminance, contrast, and efficient heat dissipation simultaneously.
Innovation Solution
The optoelectronic device incorporates a substrate with lateral electrical insulation elements, assemblies of light-emitting diodes, a transparent conductive electrode layer, a protection layer with luminophores, and walls made of different materials extending across the protection layer to enhance luminance and contrast, while also facilitating heat dissipation through conductive materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If three-dimensional light-emitting diodes are used to increase light intensity, then luminance is improved, but heat dissipation becomes more difficult
Solution Approach 1:
The device segments the pixel structure into multiple functional layers including a substrate, light-emitting diode assembly, transparent electrode layer, protection layer, and wall structures. This segmentation allows heat to be conducted through specific pathways (substrate and walls) while light is emitted through optimized optical paths, resolving the contradiction between high luminance and heat dissipation.
Solution Approach 2:
The patent introduces intermediary structures such as the transparent conductive electrode layer and the wall structures that serve dual functions: they conduct heat away from the light-emitting diodes while maintaining optical transparency or reflectivity. These intermediaries mediate between the heat-generating LEDs and the heat-dissipating substrate.
2Illumination intensity
If three-dimensional light-emitting diodes are used to increase light intensity, then luminance is improved, but contrast deteriorates
Solution Approach 1:
The patent applies local quality by making different parts of the device have different optical properties: the electrode layer is transparent to allow light passage, the protection layer contains luminophores for wavelength conversion, and the wall structures are opaque or reflective to confine light. This localized differentiation of optical properties enables high contrast while maintaining high luminance from the three-dimensional LEDs.
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 increases the maximum light intensity and contrast of the optoelectronic device while efficiently managing heat, improving its overall performance.
Implementation Method 1
optoelectronic device comprising light-emitting diodes, particularly light-emitting diodes made of inorganic materials
Implementation Method 2
light-emitting diodes formed from three-dimensional semiconductor elements
Implementation Method 3
a protection layer containing a first dielectric material at least partially transparent at least in the emission wavelength range of the light-emitting diodes and possible luminophores present in the protection layer
Data Source
AI summary
An optoelectronic device including a substrate including first and second opposite surfaces and lateral electrical insulation elements extending in the substrate and delimiting first electrically-insulated semiconductor or conductive portions. The optoelectronic device includes, for each first portion, an assembly of light-emitting diodes electrically coupled to the first portion. The optoelectronic device includes an electrode layer covering all the light-emitting diodes, a protection layer covering the electrode layer, and walls extending in the protection layer and delimiting second portions surrounding or opposite the assemblies of light-emitting diodes. The walls contain at least one material from the group including air, a metal, a semiconductor material, a metal alloy, a partially transparent material, and a core made of an at least partially transparent material covered with an opaque or reflective layer.