Liquid Crystal Lighting Fixture for Stepless Illumination
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Solution Overview
Problem
Conventional lighting fixtures require mechanical structures that are prone to wear and tear, limiting them to only two fixed light patterns and failing to provide stepless adjustments for different illumination needs on surfaces with varying gloss levels.
Innovation Solution
A lighting fixture with an electrical control system for an illumination adjusting element, comprising tin-doped indium oxide films and a liquid crystal layer, allowing seamless switching between opaque and transparent modes to adjust light patterns based on surface glossiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If mechanical structures are used to adjust light patterns, then light convergence and diffusion can be achieved, but the mechanical parts are prone to wear and tear and damage
Solution Approach 1:
The patent replaces the mechanical adjustment system with an electro-optical system. A liquid crystal layer is introduced between the light source and condensing lens, controlled by voltage application. When voltage is applied, the liquid crystal molecules align to allow light passage; when voltage is removed, they scatter light. This electrical control mechanism eliminates mechanical moving parts, thereby resolving the wear and tear issue while maintaining light pattern adjustment capability.
2Adaptability or versatility
If mechanical structures are used to provide fixed light patterns, then two distinct patterns can be achieved, but stepless adjustment between patterns is not possible
Solution Approach 1:
The patent transforms the static, discrete light pattern adjustment into a dynamic, continuous adjustment system. By controlling the voltage applied to the liquid crystal layer, the degree of light scattering can be precisely modulated. This allows the light pattern to transition smoothly between concentrated and diffused states, enabling stepless adjustment and greatly enhancing adaptability to different illumination requirements.
Solution Approach 2:
The patent changes the optical parameter of the liquid crystal layer by applying different voltages. The liquid crystal's refractive index and molecular orientation are altered electrically, which directly controls the light scattering properties. This parameter change approach enables continuous variation of light patterns without mechanical complexity, resolving the contradiction between versatility and device complexity.
3Ease of operation
If the light source and condensing lens are moved relative to each other, then light pattern switching is achieved, but the structure becomes complex and fragile
Solution Approach 1:
The patent replaces the mechanical relative movement between light source and condensing lens with an electrical control of the liquid crystal layer. Instead of moving components, the system uses voltage-controlled liquid crystal orientation to achieve the same optical effect. This substitution greatly simplifies the structure, eliminates fragility associated with moving parts, and maintains ease of operation through simple electrical switching.
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 flexible and continuous adjustment of lighting effects without mechanical stress, accommodating various application scenarios by reducing glare and enhancing light distribution on both low and high gloss surfaces.
Implementation Method 1
an illumination adjusting element which is capable of being switched between an opaque mode and a transparent mode by means of electrical control
Implementation Method 2
comprising tin-doped indium oxide films and a liquid crystal layer, allowing seamless switching between opaque and transparent modes
Implementation Method 3
comprising tin-doped indium oxide films and a liquid crystal layer
Implementation Method 4
a condensing lens which condenses the light from the light source
Implementation Method 5
a reflector which reflects the light from the light source
Data Source
AI summary
A lighting fixture includes a lighting body and an illumination adjusting element which is arranged on the lighting body and is capable of being switched between an opaque mode and a transparent mode by means of electrical control, so that the lighting fixture is able to provide different illumination patterns.