Projector Light Source Module Thermal Management
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Solution Overview
Problem
Conventional projector light source modules experience premature failure of the red light source due to higher temperature buildup, leading to frequent repairs, as it heats up faster than green and blue light sources, reducing its luminous intensity and lifespan.
Innovation Solution
A light source module design featuring a beam splitter with angled reflection sides and splitter films that allow red rays to pass through while reflecting blue and green rays, separating the red light source for improved thermal dissipation, and using LEDs for the light sources, with collimators to maintain parallel rays and ensure proper beam alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the red light source is arranged with green and blue light sources in a conventional configuration, then the projector can form color images, but the red light source heats up faster and has shorter lifespan
Solution Approach 1:
The patent divides the light source arrangement into separate zones: red light sources are positioned on one side of the beam splitter while green and blue light sources are positioned on the other side. This spatial segmentation isolates the red light sources from the heat generated by green and blue light sources, allowing independent thermal management and extending red light source lifespan.
Solution Approach 2:
The red light sources are extracted from the common light source array and positioned separately at a different location relative to the beam splitter. This extraction removes the red light sources from the high-temperature environment created by green and blue light sources, solving the overheating problem while maintaining color image formation capability.
2Temperature
If the beam splitter uses traditional angle configuration, then light paths are simple, but red light sources cannot achieve sufficient thermal dissipation
Solution Approach 1:
The beam splitter is configured with asymmetric light source positioning: red light sources are located at a first position with a specific angle relative to the beam splitter, while green and blue light sources are located at a second position with a different angle. This asymmetric arrangement creates distinct thermal zones and optical paths, enabling improved thermal dissipation for red light sources while maintaining the necessary color separation and image formation functions.
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 design extends the lifespan of the red light source by enhancing thermal dissipation, maintaining sufficient luminous intensity over time, thereby reducing the frequency of projector repairs.
Implementation Method 1
a first splitter film is provided on a first reflection side of the beam splitter and a second splitter film is provided on a second reflection side of the beam splitter. An angle between a normal line of the first reflection side and a normal line of the second reflection side is in a range between 165 degrees and 180 degrees, both the first splitter film and the second splitter film permit red rays to pass therethrough
Implementation Method 2
both the first splitter film and the second splitter film permit red rays to pass therethrough
Implementation Method 3
The beam splitter has a first reflection side, on which a first splitter film is provided, and a second reflection side, on which a second splitter film is provided
Implementation Method 4
using LEDs for the light sources, with collimators to maintain parallel rays and ensure proper beam alignment
Data Source
AI summary
A light source module of a projector includes a beam splitter, a red light source, a blue light source, and a blue light source. The beam splitter has a first reflection side, on which a first splitter film is provided, and a second reflection side, on which a second splitter film is provided. An angle between a normal line of the first reflection side, and a normal line of the second reflection side, is in a range between 165 degrees and 180 degrees. Both the first splitter film and the second splitter film permit red rays to pass therethrough. The red light source is separated from the blue and green light sources to obtain a better thermal dissipation.