Electro-optical Device Infrared Cut Filter Thermal Management
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Solution Overview
Problem
Existing electro-optical devices face temperature increases due to light irradiation, leading to malfunctions and reduced lifespan, as conventional heat dissipation methods are insufficient in effectively managing thermal issues.
Innovation Solution
The integration of an infrared cut filter on the light-transmitting cover, combined with a heat dissipation unit and strategically designed lead terminals with bent sections to enhance airflow, effectively reduces temperature increases by filtering infrared light and improving heat dissipation through increased surface area and airflow pathways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light passes through the light-transmitting cover to illuminate the mirror, then the electro-optical device can perform its light modulation function, but the element substrate temperature increases causing malfunctions and reduced device lifespan
Solution Approach 1:
The light-transmitting cover is segmented into multiple functional layers: a visible light transmission layer and an infrared reflection layer. This segmentation allows the cover to selectively transmit visible light for illumination while reflecting infrared light to prevent heat accumulation on the element substrate, thereby resolving the contradiction between maintaining light transmission function and controlling temperature.
Solution Approach 2:
The light-transmitting cover exhibits different optical properties for different wavelength ranges: it is transparent to visible light (400-700nm) while being reflective to infrared light (700nm-1mm). This local quality differentiation enables the cover to fulfill the illumination function while simultaneously preventing thermal damage to the element substrate.
2Temperature
If conventional heat dissipation methods are used, then the device structure remains simple, but temperature increase cannot be sufficiently suppressed
Solution Approach 1:
The light-transmitting cover is designed to perform multiple functions simultaneously: it serves as both the illumination window (transmitting visible light) and the heat reflection barrier (reflecting infrared light). This multi-functionality eliminates the need for separate heat dissipation structures, controlling temperature without increasing device complexity.
Solution Approach 2:
The infrared light that would normally cause harmful heat accumulation is converted into a beneficial reflected component. By designing the cover with infrared-reflective properties, the harmful thermal energy is redirected away from the element substrate, transforming a potential damage source into a controlled thermal management solution.
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 significantly suppresses temperature-related malfunctions and extends the lifespan of electro-optical devices by efficiently managing heat dissipation, preventing thermal issues and ensuring reliable operation.
Implementation Method 1
an infrared cut filter which is provided on the light-transmitting cover... suppresses an increase in temperature of the element substrate and the like since the infrared cut filter is provided on the light-transmitting cover
Data Source
AI summary
An electro-optical apparatus has an element substrate that is provided with a mirror and a sealing member which seals the mirror, and the sealing member includes a light-transmitting cover which faces the mirror opposite from the element substrate. An infrared cut filter is laminated on the light-transmitting cover.