Light Source Device Synchronizes Emission Positions for Uniform Illumination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In projector systems, color unevenness occurs due to the fixed emission axis of blue light from the second illumination device, leading to inconsistencies when combined with fluorescent light from the first illumination device, resulting in poor image quality.
Innovation Solution
A light source device with a wavelength conversion element and an emission-position changing mechanism that synchronizes the emission positions of excitation light and converted light, ensuring they align in the same direction, thereby matching the emission positions of blue light and fluorescent light for uniform illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed emission axis is used for blue light from the second illumination device, then the device structure is simple, but color unevenness occurs when combined with fluorescent light from the first illumination device
Solution Approach 1:
The patent applies the dynamics principle by making the emission position of blue light changeable through a movable mirror or prism. Instead of a fixed emission axis, the system dynamically adjusts the blue light emission position to match the moving fluorescent light emission position, thereby eliminating color unevenness while maintaining relatively simple device structure
Solution Approach 2:
The patent changes the emission position parameter of blue light to match the emission position of fluorescent light. By adjusting the position parameter of blue light dynamically, the system ensures color uniformity in the combined light without requiring complex device restructuring
2Adaptability or versatility
If separate light sources are used for excitation light and blue light, then the light source configuration is flexible, but the device complexity increases
Solution Approach 1:
The patent merges the excitation light source and blue light source into a single integrated light source device. By combining these two functions into one device and using a wavelength conversion element to generate both types of light, the system maintains configuration flexibility while significantly reducing device complexity
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 prevents color unevenness by ensuring the blue light and fluorescent light have aligned optical axes, enhancing image quality by reducing illumination inconsistencies and simplifying the projector's design by eliminating the need for separate light sources for excitation and diffusion.
Implementation Method 1
a wavelength conversion element configured to convert a wavelength of excitation light made incident thereon and emit converted light having a wavelength larger than the wavelength of the excitation light
Data Source
AI summary
A light source device includes a first light source configured to emit first color light, a wavelength conversion element configured to convert a wavelength of excitation light made incident thereon and emit converted light having a wavelength larger than the wavelength of the excitation light, and an emission-position changing mechanism configured to change an emission position of the incident excitation light to thereby change an incident position of the excitation light on the wavelength conversion element and change an emission position of the first color light and an emission position of the converted light in the same direction in synchronization with each other.