Image Display Device Heat Dissipation Through Layered Noise Control
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Solution Overview
Problem
Existing virtual image display devices face challenges in achieving effective heat dissipation while minimizing noise conduction from display elements, as noise-reducing sheets can hinder heat transfer.
Innovation Solution
The device incorporates sheet-type and grease-like heat dissipation materials that conduct heat away from display elements while suppressing noise conduction by using materials with low conductivity, and supports optical systems with metal frames for enhanced heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a noise reducing sheet is disposed between the display element and the heat dissipation sheet, then noise spreading is reduced, but heat transfer is suppressed and sufficient heat dissipation cannot be achieved
Solution Approach 1:
The patent introduces a heat dissipation sheet with specific thermal conductivity properties as an intermediary layer between the display element and the noise reducing sheet. This mediator enables heat transfer while allowing the noise reducing sheet to perform its function, thus resolving the contradiction between noise reduction and heat dissipation.
Solution Approach 2:
The patent specifies particular thermal conductivity parameters for the heat dissipation sheet to optimize both heat transfer and noise reduction performance. By carefully selecting and controlling the thermal conductivity parameter, the system achieves sufficient heat dissipation while maintaining noise reduction capabilities.
2Temperature
If a heat dissipation sheet is used to conduct heat away from the display element, then heat dissipation is improved, but noise may spread through the heat dissipation sheet
Solution Approach 1:
The noise reducing sheet acts as an intermediary layer positioned between the heat dissipation sheet and the display element. This intermediary blocks noise conduction through the heat dissipation pathway while allowing the heat dissipation sheet to continue its heat conduction function, thus resolving the contradiction between heat dissipation and noise control.
3Object-generated harmful factors
If noise reduction is prioritized by using noise reducing sheets, then noise spreading is minimized, but heat transfer efficiency decreases
Solution Approach 1:
The patent divides the heat dissipation and noise reduction functions into separate layers: a heat dissipation sheet for heat conduction and a noise reducing sheet for noise control. This segmentation allows each layer to optimize its specific function without compromising the other, thus resolving the contradiction between noise reduction and heat transfer efficiency.
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
Ensures sufficient heat dissipation and minimizes noise conduction, maintaining optimal operating temperatures and reducing image distortion.
Implementation Method 1
a first heat dissipation material that extends from the first cover member to the first display element and that conducts heat of the first display element to the first cover member
Data Source
AI summary
A display element including a light emitting portion of imaging light, an optical system configured to emit imaging light from the display element, a resin-made cover member configured to cover the optical system, and a heat dissipation material attached from the cover member to the display element and configured to conduct heat of the display element to the cover member are included.