Projector Light Source With Intersecting Dichroic Mirror
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Solution Overview
Problem
Existing light source apparatuses for projectors require separate lens members for guiding light in different wavelength ranges, leading to inefficient utilization of space, increased costs, and assembly complexity due to the need for additional components.
Innovation Solution
A light source apparatus with a rotational wheel device and a dichroic mirror that intersect, allowing for the reflection and transmission of light in multiple wavelength ranges, reducing the need for separate lens members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate lens members are provided for guiding light in different wavelength ranges, then light guidance for each wavelength can be optimized, but the number of constituent members increases and space utilization deteriorates
Solution Approach 1:
The patent combines multiple lens functions into a single common lens that handles light across different wavelength ranges (blue, green, red) through a dichroic mirror system. The common lens replaces multiple separate lens members, reducing component count while maintaining optical guidance efficiency by focusing all wavelength ranges through one optimized optical element.
Solution Approach 2:
The common lens is designed to serve multiple wavelength ranges simultaneously, making it a universal optical component. The lens structure is optimized to effectively focus blue light, green light, and red light through the dichroic mirror system, eliminating the need for wavelength-specific lens members and improving space utilization.
2Reliability
If separate lens members are provided for guiding light in different wavelength ranges, then light guidance for each wavelength can be optimized, but assembly precision requirements increase
Solution Approach 1:
By merging multiple lens functions into one common lens, the patent reduces the number of assembly interfaces and alignment points. Instead of assembling multiple separate lens members with precise relative positioning, only one common lens needs to be positioned, significantly reducing assembly precision requirements and simplifying the manufacturing process.
3Reliability
If separate lens members are provided for guiding light in different wavelength ranges, then light guidance for each wavelength can be optimized, but cost increases due to increased number of constituent members
Solution Approach 1:
The patent reduces manufacturing cost by consolidating multiple lens members into a single common lens. This reduces material costs, manufacturing costs, and especially assembly costs. The dichroic mirror system enables this consolidation by separating and directing different wavelength ranges through the common lens, achieving cost efficiency without sacrificing optical performance.
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
Enhances space utilization, reduces component count, and simplifies assembly while maintaining efficient light guidance for color image projection.
Implementation Method 1
a rotational wheel including a reflection area configured to reflect light in a first wavelength range, and a transmission area configured to transmit at least light in a second wavelength range and light in a third wavelength range
Implementation Method 2
a transmission area configured to transmit at least light in a second wavelength range and light in a third wavelength range
Implementation Method 3
a mirror configured to transmit light in the first wavelength range and light in the second wavelength range and reflect light in the third wavelength range
Data Source
AI summary
A light source apparatus includes a rotational wheel device having a rotational wheel including a reflection area configured to reflect light in the blue wavelength range, and a transmission area configured to transmit at least light in the red wavelength range and light in the green wavelength range and a dichroic mirror configured to transmit light in the blue wavelength range and light in the red wavelength range and reflect light in the green wavelength range, and the dichroic mirror includes an intersecting portion which intersects apart of the rotational wheel in an overlapping manner and on which light in the blue wavelength range, light in the red wavelength range, and light in the green wavelength range are shined.