Light Source Device with Fresnel Lens and Light Guide
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light source devices using light emitting diodes struggle to achieve high emission efficiency within a desired irradiation range.
Innovation Solution
A light source device comprising a light emitting device, a first lens with an entrance part and a light guide part, and a second lens with a Fresnel lens face, designed to collect and refract light efficiently within a specific irradiation range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional light source devices use simple lens structures, then device complexity is reduced, but emission efficiency within desired irradiation range deteriorates
Solution Approach 1:
The light source device divides the lens system into multiple functional segments: a first lens with an entrance part and light guide part, and a second lens with a Fresnel lens face. This segmentation allows each component to perform specific optical functions, improving light collection and directional control efficiency without requiring a single complex lens structure.
Solution Approach 2:
The patent introduces a multi-dimensional optical path control mechanism by adding the light guide part that directs oblique light at angles of 45 degrees or more toward the Fresnel lens face. This dimensional approach to light routing enables efficient utilization of light that would otherwise be lost, improving emission efficiency without proportionally increasing structural complexity.
2Ease of manufacture
If conventional light source devices use simple lens structures, then manufacturing is easier, but light distribution control within desired irradiation range deteriorates
Solution Approach 1:
By segmenting the optical system into a first lens, light guide part, and second lens with Fresnel face, each component can be manufactured using standard processes while achieving precise overall light distribution control. The modular design allows for easier manufacturing of individual parts compared to a single complex precision lens.
Solution Approach 2:
The light guide part acts as an intermediary component that bridges the light emitting device and the Fresnel lens. It mediates the light paths by directing oblique light at specific angles, enabling precise light distribution control without requiring the entire system to be manufactured as a single precision component.
3Device complexity
If conventional light source devices collect light without light guide parts, then device complexity is reduced, but light collection efficiency deteriorates
Solution Approach 1:
The optical system is segmented into light-collecting components (first lens), light-directing components (light guide part), and light-shaping components (second lens with Fresnel face). This segmentation enables efficient light collection and directional control while maintaining reasonable device complexity through modular design.
Solution Approach 2:
The light guide part introduces a new dimensional approach to light collection by capturing oblique light at angles of 45 degrees or more and redirecting it toward the Fresnel lens. This multi-dimensional light routing significantly improves light collection efficiency without requiring a substantial increase in 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
The device achieves high emission efficiency by effectively guiding and refracting light from the light emitting device, ensuring optimal light distribution within the desired irradiation range.
Implementation Method 1
a second lens disposed to face the first lens, wherein a lower face of the second lens facing the first lens includes a Fresnel lens face composed of a plurality of annular protruding portions
Implementation Method 2
designed to collect and refract light efficiently within a specific irradiation range
Implementation Method 3
a light guide part provided on an outside of the entrance part to guide the light entering the entrance part
Data Source
AI summary
A light source device includes: a light emitting device having an upper face including a light emission face; and a first lens having a lower face that faces the light emitting device, and an upper face opposite the lower face. The lower face of the first lens includes: an entrance part located in a center of the lower face where light from the light emitting device enters, and a light guide part located outward of the entrance part and configured to guide the light entering the entrance part. The upper face of the first lens includes a plurality of annular protruding portions.