Light-collecting plate micro lens array glare control
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Solution Overview
Problem
Lighting systems using point light sources, such as LEDs, suffer from side glaring and degradation in illumination due to wide viewing angles, which are not effectively addressed by existing diffusion plates and auxiliary diffusion sheets.
Innovation Solution
A lighting system incorporating a light-collecting plate with a micro lens array that diffuses and focuses light emitted from LEDs, controlling the radiation path and reducing side glaring by forming convex lenses on its surface with a specific diameter-to-height ratio and density, allowing for controlled illumination and viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a diffusion plate or auxiliary diffusion sheet is used to diffuse light from LEDs, then light distribution is improved, but illumination intensity degrades and viewing angle widens causing side glaring
Solution Approach 1:
The patent divides the light-collecting plate into multiple lens units arranged in an array, where each lens independently collects and directs light. This segmentation allows precise control over light distribution, concentrating light in desired directions while minimizing side glaring, thus resolving the contradiction between maintaining illumination intensity and reducing harmful glare effects.
Solution Approach 2:
The patent optimizes geometric parameters of the lens units, specifically setting the diameter-to-height ratio (H/D) between 0.4 and 0.8, and controlling lens diameter between 30-80 μm with density rate of 65%-90%. These parameter changes enable the lens array to effectively concentrate light while controlling viewing angle, thereby maintaining illumination intensity and reducing side glaring simultaneously.
2Area of stationary object
If diffusion plates are used to distribute light from point light sources, then light coverage area increases, but illumination intensity decreases
Solution Approach 1:
The patent applies local quality by creating zones of different optical properties within the light-collecting plate. The lens array creates concentrated light paths in specific directions while allowing other areas to have different light distribution characteristics. This enables the system to cover a wide area while maintaining high illumination intensity in targeted regions, resolving the contradiction between coverage area and illumination intensity.
3Area of stationary object
If the viewing angle is widened to cover more area, then light distribution improves, but side glaring increases
Solution Approach 1:
The lens units in the array serve as intermediary elements between the light source and the surrounding environment. Each lens acts as a mediator that selectively directs light toward specific areas while blocking or redirecting light that would cause side glaring. This intermediary function allows the system to achieve wide coverage area without increasing harmful glare 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
The system effectively prevents side glaring and maintains comfortable illumination levels by controlling the light's radiation path, achieving a unified glare rating (UGR) of 16.6 or less, thereby reducing user discomfort.
Implementation Method 1
a light-collecting plate for collecting the light diffused by the diffusion plate and radiating the collected light; wherein at least one lens for collecting the light diffused from the diffusion plate and radiating the collected light, and for controlling a radiation path of the light is formed on one surface or both surfaces of the light-collecting plate
Implementation Method 2
the diffusion plate includes diffusion beads regularly or irregularly therein to diverge a path of light output from the diffusion plate
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
Disclosed are a light-collecting plate and a lighting system using the same. More particularly, the present invention relates to a lighting system comprising: at least one or more light sources; a diffusion plate for diffusing light radiated from the light sources; a light-collecting plate for collecting light diffused by the diffusion plate and radiating the collected light; and a micro lens array protruding from both sides or one side of the light-collecting plate so as to collect light emitted from the light source, to radiate the collected light and to control the radiation path of the light.