LED Illumination Device with Focusing Optics for Glare Reduction
Solution Overview
Problem
Existing lighting devices fail to achieve high-quality, glare-free, and energy-efficient room illumination while maintaining a low overall height, often resulting in inefficient light emission and dazzling effects.
Innovation Solution
The lighting device features a focusing lens system that directs the luminous flux from LEDs through small light exit openings in a panel, creating a double-cone beam path with the constriction point at the opening, making the light sources invisible and allowing for efficient illumination with lower luminosity sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If large-area light exit openings are used to achieve efficient light emission, then energy efficiency is improved, but dazzling effect increases and light sources become visible
Solution Approach 1:
The patent divides the light emission function into multiple small light exit openings distributed across the panel surface, rather than using a single large opening. This segmentation allows efficient light extraction while preventing any single point from causing dazzling effects or revealing the light source structure
Solution Approach 2:
The patent applies different optical properties to different regions: the light exit openings are optimized for efficient light extraction, while the surrounding panel material provides diffusion and masking. This local differentiation enables simultaneous achievement of high light efficiency and glare-free appearance
2Length of stationary object
If light sources are positioned close to the panel to reduce overall height, then device compactness is improved, but light sources become visible and dazzling effect increases
Solution Approach 1:
The patent embeds the light sources within recesses or cavities in the panel structure, nesting them within the panel thickness rather than mounting them externally. This allows compact overall height while the panel material itself masks the light sources from view
Solution Approach 2:
The panel material with its light exit openings serves as an intermediary between the light sources and the room space. It transmits light efficiently while simultaneously hiding the light sources, mediating between the conflicting requirements of compactness and invisibility
3Object-affected harmful factors
If light sources are positioned far from the panel to hide them, then invisibility of light sources is improved, but overall height increases
Solution Approach 1:
The patent moves the light sources from the external horizontal dimension (mounting distance from panel) into the internal vertical dimension (within panel recesses). This dimensional transition allows hiding light sources without increasing the horizontal mounting space or overall projection height
4Object-affected harmful factors
If small light exit openings are used to prevent dazzling, then glare-free illumination is improved, but light emission efficiency decreases
Solution Approach 1:
The patent optimizes the parameters of the light exit openings (size, shape, distribution, orientation) to achieve the optimal balance between preventing glare and maintaining efficiency. By carefully controlling these parameters, small openings can transmit sufficient light without causing dazzling effects
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 solution provides glare-free, regionally uniform, and energy-efficient room illumination with an aesthetic appearance, reducing the visibility of light sources and enabling sufficient lighting with lower luminosity LEDs.
Implementation Method 1
the light source is assigned a focusing lens system for bundling the emitted light onto a focal point in the area of the light exit opening
Implementation Method 2
a focusing optic with a lens arranged between the light source and the panel is assigned to focus the emitted light onto a focal point
Data Source
Figure 1~3
Figure 2
AI summary
The present invention relates to a lighting device for illuminating rooms, comprising at least one light source (2), preferably in the form of an LED, and a preferably panel-shaped cover (3) having a light emission opening (4) associated with the light source (2). It is proposed to reduce the size of the at least one light emission opening (4) in the preferably panel-shaped cover (3), regardless of the size of the light source, to such an extent that glare from the light source (2) concealed behind the panel (3) is more or less eliminated. In order to nevertheless achieve efficient illumination and to prevent the light source (2) from being largely shaded by the panel (3) due to the lack of large light emission openings (4), the luminous flux emitted by the light source (2) is focused through the inherently too small light emission openings (4) in the panel (3).According to the invention, it is provided that the light source (2) is spaced apart from the light emission opening (4) of the diaphragm (3) and that a focusing optic (5) is assigned to the light source (2) for focusing the emitted light onto a focal point (7) located in the area of the light emission opening (4).