Lighting Device Light Guide Reflection Section
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Solution Overview
Problem
Existing lighting devices face challenges in enhancing light intensity in specific directions and minimizing light loss through the dispensing section, which affects their light distribution characteristics.
Innovation Solution
The lighting device incorporates a light guide with a concave section and a reflection section featuring a through hole and inclined reflection surfaces, along with an irradiation section that protrudes from the through hole, allowing for controlled light distribution and condensation of light in predetermined directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light is radiated through the dispensing section to achieve light distribution similar to incandescent bulbs, then light distribution characteristics are improved, but light loss is increased
Solution Approach 1:
The light guide is divided into multiple sections: a first light guide section for guiding light from the emitting element, a second light guide section with a concave portion for light condensation, and a dispensing section. This segmentation allows different functional zones to optimize both light distribution and reduce loss by directing more light through the condensing path rather than dispersing it all through the dispensing section.
Solution Approach 2:
The concave portion acts as an intermediary optical element between the light emitting element and the dispensing section. It condenses and redirects light, serving as a mediator that transforms the light path to reduce loss while maintaining distribution characteristics. The concave surface reflects and focuses light, creating an intermediate optical path that improves overall efficiency.
2Illumination intensity
If light intensity in predetermined directions is enhanced, then directional lighting performance is improved, but device complexity is increased
Solution Approach 1:
The concave portion is strategically positioned and shaped to create localized light condensation in specific directions. By modifying only the local geometry of the light guide (adding the concave section) rather than redesigning the entire system, the patent achieves directional enhancement with minimal added complexity. The concave surface's curvature and position are optimized to focus light where needed without requiring additional optical components.
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 enhances light intensity in desired directions and allows for precise control of light distribution, reducing light loss and improving overall light efficiency.
Implementation Method 1
a light guide that guides light radiated from the light emitting element
Implementation Method 2
a reflection section that includes a through hole provided on a bottom surface of the concave section, a first reflection surface provided on a side surface of the concave section
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A lighting device (1) according to an embodiment includes: a light emitting section (2) that has a light emitting element (21); a light guide (4) that is provided on a side of radiation of light of the light emitting section (2); and a reflection section (5) that is provided in an end section of the light guide (4) on the side opposite the side of the light emitting section (2) and includes a through hole (5b) that exposes the light guide (4) and a first reflection surface (5a) that is inclined in a direction in which a side of the light emitting section (2) approaches a side of a center shaft of the light guide (4).