Annular Light Guide Uniform Illumination Diffusion Cover
Solution Overview
Problem
Existing illumination devices with annular light-guide members fail to achieve uniform brightness across the entire surface when light is entered from one portion, resulting in significant differences in brightness between the incidence portion and other areas.
Innovation Solution
Incorporating a diffusion cover with a plate-shaped base and circular portion to diffuse light generated by the light-guide member, which includes a partition rib shape and specific wall structures to evenly distribute light, ensuring uniform illumination across the annular surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light is entered into the light-guide member from one portion to illuminate the entirety, then the light can be propagated through the light-guide member, but the incidence portion side brightens up excessively and uniform illumination cannot be achieved
Solution Approach 1:
A diffusion cover is introduced as an intermediary component between the light source and the light-guide member. This diffusion cover receives the incident light and distributes it uniformly across the light-guide member, preventing excessive brightness at the incidence portion while maintaining overall illumination effectiveness.
Solution Approach 2:
The diffusion cover is designed with different structural zones: a plate-shaped base portion covering the incidence portion and a circular portion covering the remaining areas. This local differentiation allows tailored light diffusion - the base portion handles the intense incident light while the circular portion ensures uniform distribution across the annular surface.
2Illumination intensity
If a diffusion cover is added to achieve uniform brightness, then brightness difference is reduced, but the device structure becomes more complex
Solution Approach 1:
The diffusion cover integrates multiple functions into a single component: it serves as both a light-diffusing element and a structural cover for the light-guide member. The plate-shaped base portion and circular portion are integrated into one piece, reducing the need for additional separate components while achieving uniform illumination.
Solution Approach 2:
The diffusion cover performs multiple functions simultaneously: it diffuses incident light to prevent overheating, distributes light uniformly across the annular surface, and provides structural protection for the light-guide member. This multi-functionality reduces the overall component count despite adding complexity for uniform illumination.
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 effectively reduces brightness differences between the incidence portion and other areas, achieving uniform brightness throughout the illumination device with a simple and easy-to-assemble structure.
Implementation Method 1
a light-guide member having an annular shape provided with an incidence portion of a light in one portion to illuminate the entirety by propagating an incident light
Implementation Method 2
a diffusion cover disposed on a side different from a light source side relative to the incidence portion to diffuse the light generated from the light-guide member
Data Source
AI summary
An illumination device includes a light-guide member having an annular shape provided with an incidence portion of a light in one portion, and illuminating the entirety by propagating an incident light; and a diffusion cover disposed on a side opposite to a light source relative to the incidence portion by interposing the light-guide member therebetween, and diffusing a light generated from the light-guide member. The diffusion cover includes a plate-shaped base portion covering the incidence portion side in the light-guide member, and a circular portion covering the remaining portions of the light-guide member by integrating an outer peripheral portion into the plate-shaped base portion.