Light Source Module Dichroic Mirror Passing Area
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Solution Overview
Problem
Conventional laser phosphor wheel projectors experience reduced energy and saturation of long-wavelength color light due to energy loss when it passes through dichroic mirrors, resulting in insufficient final projected color light.
Innovation Solution
A light source module comprising a first and second light-emitting unit, a dichroic mirror with a passing area, and a wavelength conversion unit with a phosphor layer on a substrate, which converts and reflects the first color light while allowing the second color light to pass through, minimizing light loss and enhancing color light supplementation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If long-wavelength color light passes through the dichroic mirror to be supplemented, then the color light saturation is improved, but the energy of the long-wavelength color light is reduced
Solution Approach 1:
The dichroic mirror is segmented into a coating area and a passing area. The coating area reflects the first color light, while the passing area allows the second color light to pass through without energy loss, resolving the contradiction between color light saturation and energy preservation
Solution Approach 2:
Different areas of the dichroic mirror have different optical properties: the coating area has high reflectivity for the first color light, while the passing area has high transmissivity for the second color light. This local differentiation allows both color lights to be effectively utilized without energy loss
2Ease of operation
If a dichroic mirror is used to separate and direct color lights, then the light path control is improved, but excessive light loss occurs
Solution Approach 1:
The dichroic mirror is divided into functional zones (coating area and passing area) that perform different operations on different color lights, enabling precise light path control while minimizing energy loss through selective transmission and reflection
Solution Approach 2:
The passing area acts as an intermediary element that allows the second color light to pass through the dichroic mirror without being reflected or absorbed, serving as a bridge between the light source and the projection path while preserving energy
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 ensures that the color light is not excessively lost during emission and projection, achieving the best light supplement effect by effectively transmitting and reflecting the light through the dichroic mirror and wavelength conversion unit.
Implementation Method 1
The phosphor layer is configured to convert the first color light transmitting through the first dichroic mirror into a third color light
Implementation Method 2
The first dichroic mirror is configured to allow the first color light to transmit through and has a passing area. The passing area is configured to allow the second color light to pass through
Implementation Method 3
The phosphor layer is configured to reflect and scatter the second color light passing through the passing area
Data Source
AI summary
A light source module includes a first light-emitting unit, a second light-emitting unit, a first dichroic mirror, and a wavelength conversion unit. The first light-emitting unit emits a first color light. The second light-emitting unit emits a second color light. The first dichroic mirror allows the first color light to transmit through and has a passing area. The passing area allows the second color light to pass through. The wavelength conversion unit includes a substrate and a phosphor layer disposed on the substrate. The phosphor layer converts the first color light transmitting through the first dichroic mirror into a third color light, and reflects and scatters the second color light passing through the passing area. The first dichroic mirror reflects the second color light reflected by the wavelength conversion unit and the third color light.