µ-OLED Display Thermal Decoupling With Ducted Fan Cooling
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Solution Overview
Problem
Existing heat management systems for micro Organic Light Emitting Diode (µ-OLED) display panels in extended-reality headsets are bulky, heavy, and inefficient, failing to effectively manage temperature at operating conditions above 40° C, which can lead to µ-OLED degradation.
Innovation Solution
A thermal management system (TMS) that thermally decouples µ-OLED display panels from electronic components using a U-shaped heat sink and integrated fan, dissipating heat through a thermally conductive structure and air flow, while providing structural support and protection to the headset.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If existing heat management systems are used to manage temperature of µ-OLED display panels, then temperature control is achieved, but the systems take up significant space and add weight
Solution Approach 1:
The patent combines the heat management function with the structural support function into a single integrated frame structure. The frame serves dual purposes: providing mechanical support for the µ-OLED display panel and electronic components, and simultaneously acting as a thermal management system through integrated heat sinks and thermal pathways. This eliminates the need for separate, bulky heat management components.
Solution Approach 2:
The frame structure is designed to perform multiple functions: structural support, thermal conduction, and mechanical protection. By making the frame multi-functional, the patent reduces the overall system weight and space requirements while maintaining effective temperature control of the µ-OLED display panel.
2Temperature
If existing heat management systems are used to manage temperature of µ-OLED display panels, then temperature control is achieved, but the systems take up significant space
Solution Approach 1:
The patent integrates the heat management functionality directly into the existing frame structure rather than adding separate heat management components. The frame incorporates thermal pathways and heat sinks that utilize the same physical space already allocated for structural support, thereby minimizing the additional area required.
Solution Approach 2:
The thermal management is achieved by utilizing the three-dimensional structure of the frame, creating thermal pathways that extend through the depth and volume of the assembly rather than requiring additional surface area. This allows efficient heat dissipation within the existing footprint of the device.
3Temperature
If µ-OLED display panels operate at temperatures above 40° C, then higher operating temperatures are achieved, but the display panels degrade
Solution Approach 1:
The patent extracts heat from the µ-OLED display panel environment by providing dedicated thermal pathways that conduct heat away from the display panel to heat sinks positioned in thermally favorable locations. This active heat extraction maintains the display panel temperature below the 40°C degradation threshold even when surrounding components operate at higher temperatures.
Solution Approach 2:
The patent introduces thermal interface materials and intermediary thermal pathways between the µ-OLED display panel and the heat sinks. These intermediaries facilitate efficient heat transfer while providing thermal decoupling that protects the sensitive display panel from direct thermal exposure to hotter electronic components.
4Temperature
If thermal management system draws heat away from µ-OLED display panels, then temperature control is achieved, but the system is not well suited for use in extended-reality headsets
Solution Approach 1:
The patent merges the thermal management system with the structural frame of the extended-reality headset, creating an integrated solution that is specifically adapted for headset applications. The frame-based approach provides the necessary temperature control while maintaining the compact, lightweight form factor required for comfortable headset wear.
Solution Approach 2:
The patent implements localized thermal management by positioning heat sinks and thermal pathways in specific locations within the headset structure where they can most effectively draw heat from the µ-OLED display panel. This localized approach optimizes thermal control while minimizing the overall system size and weight for headset compatibility.
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 TMS effectively manages temperature within the headset, preventing µ-OLED degradation by maintaining optimal temperatures for both the display panels and electronic components, enhancing the durability and performance of extended-reality headsets.
Implementation Method 1
dissipating heat through a thermally conductive structure
Implementation Method 2
dissipating heat through a thermally conductive structure and air flow
Data Source
AI summary
A device includes a micro-organic light emitting diode (µ-OLED) display panel and an electronic component. An electrical connector electrically couples the µ-OLED display panel and the electronic component. An air duct is physically coupled to the µ-OLED display panel and the electronic component. The air duct functions to cool the µ-OLED display panel when air flows through the air duct. A system fan provides air flow to the air duct and dissipates heat away from the display panel. A system fan can be located disconnected from the µ-OLED display panel and can provide air flow to the air duct to dissipate heat away from the display panel. The device can be implemented with a single fan solution or a multiple fan solution (e.g., two or more fans).