LED Lamp Optical Element for Glare Reduction
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Solution Overview
Problem
Existing lamps with LED light sources and optical reflection and transmission elements often suffer from glare issues due to the high luminance and bundled light emission, leading to reflections on illuminated surfaces.
Innovation Solution
Incorporating a glare suppression and deflection unit, such as a microprism plate or partially transparent spherical cap structure, to deflect and partially transmit the light, reducing glare and enabling effective anti-glare effects while maintaining indirect lighting capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an optical reflection and transmission element with high luminance is used to achieve efficient light distribution, then lighting efficiency is improved, but reflected glare occurs on illuminated surfaces
Solution Approach 1:
The optical element is divided into multiple segments with different optical properties: a first region that reflects light for direct illumination and a second region that transmits light for indirect illumination. This segmentation allows each region to perform its function optimally without causing glare, as the transmitted portion is diffused while the reflected portion provides focused lighting.
Solution Approach 2:
Different regions of the optical element are assigned different local qualities: the first region has high reflectivity for efficient direct lighting, while the second region has high transmissivity for soft indirect lighting. This local differentiation enables the system to achieve high overall lighting efficiency while the transmitted region specifically addresses the glare problem by providing diffuse, non-glaring illumination.
2Use of energy by moving object
If LED light source emits bundled light to achieve high efficiency, then energy efficiency is improved, but glare risk increases on illuminated surfaces
Solution Approach 1:
The bundled LED light is segmented by the optical element into reflected and transmitted components. The transmitted component passes through a diffusing region that breaks up the bundled nature of LED light, converting it into diffuse, non-glaring illumination while the reflected component maintains the efficient directed lighting for overall illumination.
Solution Approach 2:
The optical element acts as an intermediary between the bundled LED light source and the illuminated surfaces. It receives the efficient but potentially glary bundled light and transforms it into two separate light paths: one reflected for direct illumination and one transmitted and diffused for glare-free indirect illumination, thus mediating between energy efficiency and glare prevention.
3Productivity
If optical element is designed for direct illumination to improve lighting efficiency, then light distribution efficiency is improved, but indirect lighting capability is reduced
Solution Approach 1:
The optical element is designed with multi-functionality, serving both direct and indirect lighting purposes simultaneously. The first region provides efficient direct illumination through reflection, while the second region provides indirect illumination through transmission and diffusion. This universal design allows a single optical element to fulfill multiple lighting functions, enhancing the lamp's adaptability for different lighting scenarios.
Solution Approach 2:
The optical element is segmented into functional regions: one optimized for direct light reflection and another for light transmission and diffusion. This segmentation enables each region to specialize in its function while working together to provide comprehensive lighting coverage, maintaining high light distribution efficiency through the reflected portion while simultaneously enabling effective indirect lighting through the transmitted portion.
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 significantly reduces the risk of reflected glare while maintaining efficient light distribution, allowing for both direct and indirect lighting with a compact design.
Implementation Method 1
optical reflection and transmission element which reflects a first part of the light and transmits a second part of the light
Implementation Method 2
optical reflection and transmission element which reflects a first part of the light and transmits a second part of the light
Implementation Method 3
glare suppression and deflection unit has a microprism plate
Implementation Method 4
glare suppression and deflection unit has a microprism plate
Implementation Method 5
glare suppression and deflection unit, such as a microprism plate or partially transparent spherical cap structure
Implementation Method 6
glare suppression and deflection unit, such as a microprism plate or partially transparent spherical cap structure
Implementation Method 7
LED light source (LED: light-emitting diode) for generating a light
Data Source
Figure 1
Figure 2
AI summary
The lamp has a light emitting diode light source (1) for generating a light (L) and an optical reflection-and transmission-element, which reflects a first portion (L1) of the light and transmits a second portion of the light. The first portion of the light is provided for generating a direct lighting. A glare and return unit is provided for glare control and deflection of the second portion of the light.