Lighting Device With Liquid Crystal Lens For Rectangular Light Spot
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Solution Overview
Problem
Existing lighting devices that change the shape or size of light spots suffer from high energy loss and require significant time and effort to arrange light shading plates, making them inefficient for dynamic lighting applications.
Innovation Solution
The use of a funnel-shaped reflector with an LED light source and a liquid crystal lens at the opening, where the distance from the neck to the opening is such that the ratio of height to diameter is two or larger, allowing for the adjustment of light spot shape and size with minimal energy loss, combined with the ability to use both circular and rectangular reflectors to achieve various light distributions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light shading plates are used to change the shape or size of light spot, then the lighting area can be adjusted, but energy loss increases significantly
Solution Approach 1:
The patent replaces the mechanical light shading plate system with an electro-optical liquid crystal lens system. The liquid crystal lens changes its focal length in response to voltage signals, thereby controlling the light spot shape and size without physically blocking light. This substitution eliminates the energy loss associated with light absorption by shading plates while maintaining adaptability in light distribution.
Solution Approach 2:
The patent utilizes the variable focal length parameter of the liquid crystal lens to dynamically adjust the light spot characteristics. By changing the focal length parameter in response to voltage signals, the system achieves flexible control over light distribution patterns without the energy waste inherent in physical light blocking methods.
2Adaptability or versatility
If light shading plates are arranged to acquire proper lighting area, then the light distribution can be controlled, but it takes significant time and effort
Solution Approach 1:
The patent replaces the manual arrangement of light shading plates with an automated electro-optical control system. The liquid crystal lens responds instantaneously to voltage signals, enabling rapid adjustment of lighting area without the time-consuming manual positioning required by traditional shading plate methods.
Solution Approach 2:
The patent introduces dynamic control through the voltage-responsive liquid crystal lens, which can continuously and rapidly adjust its optical properties. This dynamic system eliminates the static, time-consuming arrangement process of traditional shading plates, allowing real-time adaptation to different lighting requirements.
3Device complexity
If traditional lighting devices are used, then the structure is simple, but the ability to change light spot shape or size is limited
Solution Approach 1:
The patent integrates multiple functions into a single compact component: the liquid crystal lens simultaneously serves as both a focusing element and a light distribution controller. This multi-functional approach enables diverse light spot patterns (circular, rectangular, adjustable sizes) without requiring complex mechanical assemblies, achieving high adaptability with moderate structural 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
This configuration enables simple and efficient adjustment of light spot shape and size with reduced energy loss, allowing for precise control of light distribution and increased utilization efficiency compared to traditional methods using light shading plates.
Implementation Method 1
a liquid crystal lens is disposed at the opening
Implementation Method 2
a funnel shaped reflector which includes a neck portion and an opening portion, in which an LED as a light source is disposed at the neck
Data Source
AI summary
The purpose is to provide a rectangle light spot with a simple structure. The invention is: A lighting device having a funnel shaped reflector which includes a neck portion and an opening portion, in which an LED as a light source is disposed at the neck, the opening portion of the funnel shaped reflector is a circle in a plan view, provided a distance from the neck portion to the opening portion along an optical axis is h, and a diameter of the circle is d, h/d is two or larger, and a liquid crystal lens is disposed at the opening.