Funnel Reflector Lighting Device Rectangular Light Spot
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Solution Overview
Problem
Existing lighting devices struggle to create uniform illumination in rectangular spaces due to their circular light spot design, requiring complex designs and manufacturing processes to achieve pseudorectangular or rectangular light spots.
Innovation Solution
A lighting device featuring a funnel-shaped reflector with a rectangular opening and LED light source, where the aspect ratio of the opening to the height is 2 or larger, allowing for the generation of rectangular and other desired light spot shapes through a simple structure by controlling the light distribution angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If multiple different reflecting plates or concave mirrors are disposed according to their reflecting characteristics, then rectangular light spot can be acquired, but device complexity and manufacturing process become complicated
Solution Approach 1:
The invention divides the reflecting surface into multiple reflection regions (first reflection region and second reflection region) with different reflecting characteristics. Each region is responsible for directing light to specific areas to form the rectangular light spot pattern, eliminating the need for multiple separate reflecting plates or concave mirrors while achieving the desired light distribution.
Solution Approach 2:
Different regions of the single reflecting plate are assigned different local reflecting characteristics. The first reflection region has specific reflectivity and orientation for directing light to certain zones, while the second reflection region has different properties for other zones. This local differentiation allows a single component to perform functions that previously required multiple components.
2Shape
If multiple concave mirrors with different shapes are disposed considering their reflecting characteristics, then pseud rectangular light spot can be acquired, but manufacturing precision requirements increase
Solution Approach 1:
The reflecting plate is segmented into multiple reflection regions with distinct optical functions. By integrating these segmented regions into a single plate, the invention eliminates the need for precise positioning and alignment of multiple separate concave mirrors, thereby reducing manufacturing precision requirements while maintaining the ability to form rectangular light spots.
Solution Approach 2:
Multiple reflecting functions that previously required separate concave mirrors are merged into a single reflecting plate with multiple reflection regions. This consolidation eliminates alignment and positioning challenges associated with multiple components, simplifying the manufacturing process while achieving the same optical effect.
3Device complexity
If circular light spot design is used, then lighting device structure is simple, but uniform illumination in rectangular spaces cannot be achieved
Solution Approach 1:
The reflecting plate incorporates regions with different local reflecting characteristics to transform the circular light output from the light source into a rectangular light spot pattern. By strategically designing the reflectivity and orientation of different regions, the invention achieves shape transformation while maintaining structural simplicity.
Solution Approach 2:
The invention transforms the light distribution from a circular pattern to a rectangular pattern by utilizing spatial variation in reflecting characteristics across the reflecting plate surface. This dimensional transformation of the light spot shape is achieved through the geometric arrangement and optical properties of different reflection regions.
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
Enables the creation of rectangular and various light spot shapes with improved uniformity and simplicity in design and manufacturing, maintaining the shape even at distant irradiated surfaces with a small light distribution angle of 10 degrees or less.
Implementation Method 1
an LED, which is disposed at the neck
Implementation Method 2
a funnel shaped reflector including a neck and an opening
Data Source
AI summary
The purpose is to realize a lighting device which can project a light spot of rectangle with a simple structure. The invention is: A lighting device having a light source unit 1, the light source unit 1 including a funnel shaped reflector 10 and an LED 20, in which the funnel shaped reflector 10 includes a neck and an opening, the LED 20 is disposed at the neck of the funnel shaped reflector 10, a plan view of the opening is a rectangle, and provided a distance from the neck to the opening along axis is d, and one side of the rectangle is x, either one of the first light source unit and the second light source unit satisfies, d/x is 2 or larger.