Infrared Ray Dividing Part for Light Source Unit Cooling
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Solution Overview
Problem
Image projection apparatuses face inefficiencies in cooling due to infrared rays generated by light sources, which can increase component temperatures and reduce manufacturing cost-effectiveness by requiring additional heat-resistant materials.
Innovation Solution
A light source unit with an infrared ray dividing part that blocks and absorbs infrared rays using a blocking part with an absorbing layer, while maintaining a cooling channel through passing parts with openings, effectively preventing infrared rays from exiting the apparatus and enhancing cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If infrared rays are allowed to pass through the reflective member, then the light source unit structure is simple, but the temperature of components increases and cooling efficiency deteriorates
Solution Approach 1:
The infrared ray dividing part is divided into multiple functional sections: a blocking part with blocking surfaces that absorb infrared rays, and passing parts with openings that allow visible light to pass through. This segmentation allows selective filtering of infrared rays while maintaining light transmission, resolving the contradiction between temperature control and structural simplicity.
Solution Approach 2:
The infrared ray dividing part acts as an intermediary component positioned between the reflective member and the external environment. It selectively blocks infrared rays while allowing visible light to pass through, thereby controlling component temperature without interfering with the lighting function, thus resolving the contradiction between temperature management and structural simplicity.
2Temperature
If additional heat-resistant materials are used to block infrared rays, then cooling efficiency is improved, but manufacturing cost increases
Solution Approach 1:
The blocking part is designed with specific local properties: inner surfaces coated with black paint or other heat-absorbing materials that selectively absorb infrared rays. This localized application of heat-absorbing properties in specific areas (the blocking part) rather than throughout the entire structure achieves effective infrared blocking while minimizing material costs and manufacturing complexity.
3Length of stationary object
If a compact design is implemented, then the apparatus is slimmer, but infrared ray blocking effectiveness may be compromised
Solution Approach 1:
The infrared ray dividing part is positioned in the optical path at a specific distance from the reflective member, utilizing the spatial dimension to achieve effective infrared blocking. The blocking surfaces are oriented to intercept infrared rays traveling in different directions, creating a three-dimensional blocking arrangement that effectively stops infrared rays while maintaining a compact overall apparatus thickness.
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 effectively blocks infrared rays, improving cooling efficiency, reducing material costs, and allowing for a slimmer design by preventing thermal impact on components and eliminating the need for additional heat-resistant materials.
Implementation Method 1
comprises a blocking part to block part of infrared rays generated from the light source
Implementation Method 2
a reflective member which reflects light emitted from the light source
Data Source
AI summary
A light source unit and an image projection apparatus are provided. The light source unit includes: a light source part including a light source and a reflective member which reflects light emitted from the light source; and an infrared ray dividing part which is provided corresponding to a shape of the reflective member, is spaced apart from the reflective member, and includes a blocking part to block part of infrared rays generated from the light source and passing through the reflective member and a passing part having an opening formed through the blocking part. The image projection apparatus includes the light source unit and a casing accommodating the light source unit.