Light Combining Module Alignment Structure for Projector Brightness
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Solution Overview
Problem
Conventional projection modules face challenges in enhancing the brightness of the image projected, particularly in effectively exciting the green LED, which affects the overall brightness and image quality.
Innovation Solution
A light combining module with an alignment structure that adjusts the position of the light source module, dichroic mirror, or collimating lens to optimize the light combination, utilizing a combination of LEDs and dichroic mirrors to enhance excitation efficiency and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional light sources (red LED, blue LED, green LED) are used to generate projection light, then the projection module can produce image light, but the brightness of the projected image is insufficient due to inadequate excitation of the green LED
Solution Approach 1:
The patent combines multiple light sources (first light source emitting first light, second light source emitting second light) with different spectral characteristics to illuminate the green fluorescent material. The first light source directly excites the green fluorescent material, while the second light source provides additional excitation through the dichroic mirror, creating a merged illumination system that enhances overall excitation efficiency and green light output brightness.
Solution Approach 2:
The patent introduces a green fluorescent material as an intermediary that converts light from the light sources into green projection light. The fluorescent material acts as a mediator that transforms the spectral output of the LEDs into the desired green wavelength range, improving the effectiveness of energy conversion and enhancing the brightness of the green component in the projected image.
2Manufacturing precision
If the position of light sources and optical components is fixed, then the device structure is simple, but the alignment precision between light sources and optical components is insufficient, leading to reduced excitation efficiency
Solution Approach 1:
The patent implements adjustable mounting structures for the light sources and optical components, allowing dynamic repositioning during assembly and alignment. The first light source and second light source can be independently adjusted in position, enabling precise alignment with the green fluorescent material and dichroic mirror. This dynamic adjustability ensures high manufacturing precision while maintaining a relatively simple overall device structure through modular design.
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
The solution achieves higher brightness and improved image quality by ensuring precise alignment and excitation of light sources, specifically enhancing the green light output through the alignment structure, resulting in better performance for projectors.
Implementation Method 1
The first dichroic mirror is disposed on a transmission path of the first light and the second light, wherein the first light is incident on the second light source via the first dichroic mirror
Data Source
AI summary
A light combining module includes a first light source, a second light source, a first dichroic mirror, and an alignment structure. The first light source is used to output a first light. The second light source is used to output a second light. The first dichroic mirror is disposed on a transmission path of the first light and the second light, wherein the first light is incident on the second light source via the first dichroic mirror. The alignment structure adjusts the position of the second light source.