Side Illumination Lens with V-Shaped Total Reflection Surface
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Solution Overview
Problem
Conventional luminescent devices using total internal reflection lenses are complex and costly to manufacture due to the need for multiple refractive surfaces, making it difficult to achieve side illumination effectively.
Innovation Solution
A side illumination lens with a total reflection surface and linear or curved refractive surfaces extending from its periphery, allowing for efficient side luminescence while simplifying the manufacturing process and reducing costs, integrated into a luminescent device with a heat sink for enhanced heat dissipation and light output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional lenses with multiple refractive surfaces are used to achieve total internal reflection, then side illumination is achieved, but the fabrication process becomes complicated and costs increase
Solution Approach 1:
The patent extracts the essential function of total internal reflection from the complex multi-surface lens structure and implements it using a simpler single curved surface that extends from the periphery of a V-shaped total reflection surface. This eliminates the need for multiple refractive surfaces while maintaining the side illumination effect through total internal reflection at the single curved interface.
Solution Approach 2:
Instead of creating multiple refractive surfaces that bend light through refraction, the patent inverts the approach by using a single curved refractive surface that works in conjunction with a V-shaped total reflection surface. The light path is inverted by reflecting off the V-shaped surface first, then exiting through the single curved surface, achieving side illumination with simpler geometry.
2Illumination intensity
If conventional lenses with multiple refractive surfaces are used to achieve total internal reflection, then side illumination is achieved, but fabricating costs increase
Solution Approach 1:
The patent extracts the essential function of total internal reflection from the complex multi-surface lens structure and implements it using a simpler single curved surface that extends from the periphery of a V-shaped total reflection surface. This eliminates the need for multiple refractive surfaces while maintaining the side illumination effect through total internal reflection at the single curved interface.
Solution Approach 2:
The patent adopts a lens design that can be easily fabricated using conventional molding techniques, replacing the expensive and complex multi-surface lens. The simpler geometry with a V-shaped total reflection surface and single curved refractive surface reduces manufacturing complexity and cost, making it suitable for mass production.
3Power
If luminescent devices emit light forward, then light output is efficient, but side illumination capability is poor
Solution Approach 1:
The patent segments the light emission function by separating the forward-emitting luminescent chip from the side-illuminating lens structure. The V-shaped total reflection surface captures forward-emitted light and redirects it to the curved refractive surface, which then emits light in the side direction. This segmentation allows the device to maintain efficient light output while achieving side illumination capability.
Solution Approach 2:
The patent transitions the light emission from a one-dimensional forward direction to a two-dimensional side direction by using the V-shaped total reflection surface to redirect light at 45-degree angles, and the curved refractive surface to emit light horizontally. This dimensional change enables side illumination while maintaining the efficiency of forward-emitting LED chips.
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 enables effective side illumination, reduces manufacturing defects and costs, and allows for high-volume production of luminescent devices with improved light output and heat dissipation properties.
Implementation Method 1
studies on development of a device capable of emitting light in side directions of a lens have been actively conducted using the total internal reflection (TIR) property of light
Implementation Method 2
a plurality of refractive surfaces which have different slopes and through which light reflected by the total reflection surface is emitted to the outside
Data Source
AI summary
The present invention relates to a side illumination lens and a luminescent device using the same, and provides a body, a total reflection surface with a total reflection slope with respect to a central axis of the body, and a linear and/or curved refractive surface(s) formed to extend from a periphery of the total reflection surface; and a luminescent device including the lens. According to the present invention, a lens with total internal reflection surfaces with different slopes, and a linear and/or curved refractive surface(s) allows light emitted forward from a luminescent chip to be guided to a side of the lens. Further, a linear surface(s) formed in a direction perpendicular or parallel to a central axis of a lens and a curved surface are formed on an edge of the lens so that a process of fabricating the lens is facilitated, thereby reducing a defective rate and fabrication costs of the lens.