Thermally Conductive Optical Elements for AR Heat Dissipation
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Solution Overview
Problem
Current augmented and virtual reality devices face challenges in efficiently dissipating heat, particularly in space-constrained designs, which can lead to reduced display brightness and a poorer user experience.
Innovation Solution
The use of thermally conductive optical elements, such as silicon carbide and optically transparent ceramics, in conjunction with thermally conductive connectors like conductive foam and thermal straps, to efficiently dissipate heat across lenses and waveguides within the devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional thermally insulating materials (glass) are used for optical elements, then optical transparency is maintained, but heat dissipation capability deteriorates
Solution Approach 1:
The patent changes the thermal conductivity parameter of optical elements by transitioning from traditional glass to advanced materials like silicon carbide and optically transparent ceramics. This material substitution maintains optical transparency while dramatically improving heat dissipation capability, allowing optical elements to serve dual functions of light transmission and thermal management
Solution Approach 2:
The patent employs composite material strategies by combining thermally conductive materials with optical transparency properties. Specifically, it uses silicon carbide and optically transparent ceramics that exhibit both excellent thermal conductivity and optical clarity, creating a composite functional material that simultaneously addresses heat dissipation and optical performance requirements
2Temperature
If heat dissipation components are added to improve heat dissipation, then heat dissipation capability is improved, but device size and weight increase
Solution Approach 1:
The patent makes optical elements multi-functional by enabling them to perform both their primary function of light transmission and a secondary function of heat dissipation. By selecting materials like silicon carbide and optically transparent ceramics, the same optical components that guide and transmit light also serve as heat sinks, eliminating the need for separate dedicated heat dissipation components and thereby avoiding additional weight
Solution Approach 2:
The patent merges the heat dissipation function with existing optical elements rather than adding separate heat dissipation components. The optical elements are designed to simultaneously conduct heat and transmit light, combining thermal management and optical functions into a single integrated component structure, thus avoiding the weight penalty of additional dedicated cooling components
3Temperature
If heat dissipation components are added to improve heat dissipation, then heat dissipation capability is improved, but device complexity increases
Solution Approach 1:
The patent makes optical elements multi-functional by enabling them to perform both their primary function of light transmission and a secondary function of heat dissipation. By selecting materials like silicon carbide and optically transparent ceramics, the same optical components that guide and transmit light also serve as heat sinks, eliminating the need for separate dedicated heat dissipation components and thereby avoiding additional complexity
Solution Approach 2:
The patent merges the heat dissipation function with existing optical elements rather than adding separate heat dissipation components. The optical elements are designed to simultaneously conduct heat and transmit light, combining thermal management and optical functions into a single integrated component structure, thus avoiding the complexity of additional dedicated cooling components
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 approach enables more effective heat dissipation, maintaining display brightness and improving the overall performance and usability of augmented and virtual reality devices without increasing their size or weight.
Implementation Method 1
a thermally conductive optical element that is optically transparent and that dissipates the heat produced by the heat source
Implementation Method 2
a thermally conductive connector that transfers the heat between the heat source and the thermally conductive optical element
Data Source
AI summary
An optical device may include (i) a heat source that produces heat while operating, (ii) a thermally conductive optical element that is optically transparent and that dissipates the heat produced by the heat source, and (iii) a thermally conductive connector that transfers the heat between the heat source and the thermally conductive optical element. Various other methods, systems, and computer-readable media are also disclosed.