Projection Illumination System Reducing Optical Loss
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Solution Overview
Problem
Conventional projection apparatuses suffer from efficiency loss, high cost, and increased volume due to the presence of numerous optical elements in the optical system, which lead to absorption, reflection, and misalignment issues.
Innovation Solution
The proposed projection apparatus includes an illumination system with a light source device, light homogenization device, optical transmission module, and optical wavelength conversion module, where the light source beam is optimized by the light homogenization device and optical transmission module before reaching the wavelength conversion module, allowing the omission of additional light homogenization elements between the wavelength conversion module and the light valve, thereby reducing the number of optical elements and simplifying the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If an optical system with multiple lenses and prism sets is disposed between the light homogenization element and the light valve, then light utilization is increased, but efficiency loss increases due to absorption and reflection by multiple elements
Solution Approach 1:
The patent extracts and removes the optical system (lenses and prism sets) from the traditional placement between the light homogenization element and the light valve. By taking out these intermediate optical elements, the patent eliminates the associated absorption and reflection losses while maintaining light utilization through alternative design approaches.
Solution Approach 2:
The patent merges the functions of the optical system into the light homogenization element itself. The light homogenization element is designed to simultaneously perform homogenization and the functions previously requiring separate lenses and prisms, thereby reducing the total number of optical elements and associated losses.
2Use of energy by moving object
If more optical elements are used to increase light utilization, then the volume and cost of the projection apparatus increase
Solution Approach 1:
The patent removes the intermediate optical system comprising multiple lenses and prism sets, thereby reducing the overall volume of the projection apparatus. This extraction of unnecessary components directly decreases the device volume while maintaining optical performance.
Solution Approach 2:
The patent combines multiple optical functions into a single light homogenization element, eliminating the need for separate lenses and prisms. This merging reduces the total number of components and their associated volumes, leading to a more compact device.
3Use of energy by moving object
If more optical elements are used to increase light utilization, then the cost of the projection apparatus increases
Solution Approach 1:
The patent extracts and removes the intermediate optical system with multiple lenses and prisms, thereby reducing manufacturing costs. Fewer optical elements mean lower material costs, reduced assembly complexity, and easier manufacturing processes.
Solution Approach 2:
The patent merges multiple optical functions into a single light homogenization element, reducing the total number of components that need to be manufactured and assembled. This consolidation directly reduces manufacturing costs and simplifies the production process.
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 configuration results in reduced efficiency loss, lower costs, and a smaller volume by optimizing the light source beam and matching speckle shapes, increasing conversion efficiency and avoiding unnecessary optical elements, thus enhancing the overall performance of the projection apparatus.
Implementation Method 1
The optical wavelength conversion module is disposed on a transmission path of the light source beam from the optical transmission module and is configured to convert a first portion of the light source beam into a converted light beam. A wavelength of the converted light beam is different from a wavelength of the light source beam.
Data Source
AI summary
A projection apparatus and an illumination system thereof are provided. The illumination system includes a light source device, a light homogenization device, an optical transmission module, and an optical wavelength conversion module. The light homogenization device is disposed on a transmission path of a light source beam from the light source device. The optical transmission module is disposed on a transmission path of the light source beam from the light homogenization device. The optical wavelength conversion module is disposed on a transmission path of the light source beam from the optical transmission module and is configured to convert a first portion of the light source beam into a converted light beam. The converted light beam and a second portion of the light source beam form an illumination light beam. The light homogenization device is disposed outside a transmission path of the illumination light beam.