Solid-state light source device with lens array for uniform intensity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional projector light sources, such as those using discharge lamps, face issues with short product life, difficulty in quick lighting, and ultraviolet light degradation of liquid crystal light valves, while alternative light sources like solid-state arrays suffer from light saturation due to uneven intensity distribution, leading to reduced luminance efficiency.
Innovation Solution
A light source device comprising a plurality of solid-state light sources emitting excitation light as parallel beams, a lens array to divide and homogenize the light, and a light collection optical system to ensure uniform intensity distribution on the light emitting element, preventing light saturation and enhancing luminance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a solid-state light source array is used to increase light intensity, then the light intensity is improved, but the light intensity distribution becomes uneven causing light saturation and reduced luminance efficiency
Solution Approach 1:
The patent divides the excitation light into multiple partial light beams using a lens array, where each lens in the array focuses light from different solid-state light sources onto different regions of the fluorescent body. This segmentation ensures that light intensity is distributed more uniformly across the fluorescent body surface, preventing saturation in any single region while maintaining high overall light intensity.
Solution Approach 2:
The patent applies different optical paths and focusing conditions to different regions of the fluorescent body. Each region receives light from specific solid-state light sources through controlled optical focusing, creating locally optimized illumination conditions that prevent saturation while maximizing overall luminance efficiency.
2Illumination intensity
If the excitation light intensity is increased to obtain intense light, then the light intensity is improved, but the luminance efficiency degrades due to light saturation
Solution Approach 1:
By segmenting the excitation light into multiple partial light beams that are distributed across different regions of the fluorescent body, the system achieves high light intensity without causing saturation. Each region receives appropriate intensity levels, maximizing the conversion efficiency of excitation light to fluorescence throughout the entire fluorescent body.
Solution Approach 2:
The patent changes the spatial distribution parameter of the excitation light by using a lens array to redirect and distribute light from multiple solid-state light sources. This parameter change allows the system to maintain high overall light intensity while ensuring uniform distribution that prevents saturation and maximizes luminance efficiency.
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 stabilizes light intensity and prevents light saturation, allowing for high-quality image display with improved luminance efficiency and extended light source life.
Implementation Method 1
a light source section (10A, 10B) including a plurality of solid-state light sources (12) emitting excitation light as parallel beams
Implementation Method 2
a lens array (32, 34) dividing the excitation light into a plurality of partial light beams
Implementation Method 3
a light emitting element (60) emitting fluorescence by being excited by the excitation light collected by the light collection optical system
Data Source
AI summary
A light source device includes a light source section adapted to emit excitation light, a lens array adapted to divide the excitation light into a plurality of partial light beams, a light collection optical system adapted to collect the excitation light divided into the plurality of partial light beams, and a light emitting element adapted to emit fluorescence by being excited by the excitation light.