Solid-State Light Source Array Cooling Configuration
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Solution Overview
Problem
Existing projection display apparatuses face challenges in miniaturization due to the size constraints imposed by the cooling mechanisms of solid-state light sources, which limit the compactness of the light source device and the overall apparatus.
Innovation Solution
The light source device incorporates a configuration where the third solid-state light source array, requiring the lowest target cooling temperature, is positioned on one side, and the first and second solid-state light source arrays, capable of operating under higher temperatures, are positioned on the other side, allowing for a reduced size without compromising cooling efficiency. This configuration utilizes a light combiner with dichroic mirrors and a half mirror to combine and direct color lights into a single optical path, minimizing the space required for the cooling mechanisms and enhancing light efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If solid-state light sources are used to achieve miniaturization and high efficiency, then light utilization efficiency is improved, but the cooling mechanism size increases and restricts further miniaturization
Solution Approach 1:
The patent divides the solid-state light source system into three separate arrays (blue, green, red) with different cooling requirements. By segmenting the light sources and their cooling mechanisms, the system can optimize cooling for each color independently, reducing the overall cooling mechanism size while maintaining high light utilization efficiency.
Solution Approach 2:
The patent arranges the three solid-state light source arrays in a triangular configuration around the optical axis, utilizing spatial distribution in multiple dimensions. This dimensional arrangement allows each array to have its own optimized cooling path while maintaining compact overall structure, resolving the contradiction between miniaturization and cooling requirements.
2Productivity
If multiple solid-state light source arrays are arranged to combine color lights, then light combination efficiency is improved, but device complexity increases
Solution Approach 1:
The patent merges the optical paths of three separate solid-state light source arrays through a shared optical system. The light combining mechanism integrates blue, green, and red light paths into a single projection path, achieving high light combination efficiency while managing device complexity through unified optical design.
Solution Approach 2:
The patent designs a universal optical system that handles multiple color lights (blue, green, red) from different solid-state light source arrays. The optical components are configured to universally process and combine different wavelengths, improving light combination efficiency while avoiding the need for separate processing systems for each color.
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 arrangement enables a more compact light source device and projection display apparatus by optimizing the placement of cooling mechanisms and light combination, reducing the size of the installation area while maintaining efficient light usage and temperature control.
Implementation Method 1
a light combiner for combining the first to third color lights respectively from the first to third solid-state light source arrays into a combined color light
Data Source
AI summary
The light source device includes a first solid-state light source array emitting a first color light, a second solid-state light source array emitting a second color light, a third solid-state light source array emitting a third color light, and a light combiner for combining the first to third color lights respectively from the first to third solid-state light source arrays into a combined color light, and emitting a light flux of the combined color light in the same direction. The third solid-state light source array requiring the lowest target cooling temperature among the first to third solid-state light source arrays is disposed on a first side, and the first and second solid-state light source arrays are disposed on a second side, with an optical axis of the light flux emitted from the light combiner, as a boundary.