LED Light Shaping Screen with Slots and Chamfers
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Solution Overview
Problem
Lighting fixtures with punctiform sources like LEDs face issues with parasitic reflection phenomena, leading to undesired side emissions and light smears when emitting nearly laminar and two-dimensional light flows.
Innovation Solution
A screen of opaque material with slots and inclined chamfers is arranged near the LEDs to allow the main light flow while blocking secondary reflections, shaping the light beam to minimize parasitic effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If punctiform light sources like LEDs are used to emit nearly laminar and two-dimensional light flows, then lighting control and flexibility are improved, but parasitic reflection phenomena occur causing undesired side emissions and light smears
Solution Approach 1:
A screen with slots is introduced as an intermediary element between the LED light source and the environment. This screen allows the main light flow to pass through the slots while blocking parasitic reflections, thus mediating between the beneficial laminar light emission and the harmful side emissions without eliminating either completely
Solution Approach 2:
The screen structure implements local quality by having different regions with different properties: slots that are transparent to light in the main emission direction, and opaque regions that block light in parasitic reflection directions. This spatially differentiated quality allows selective transmission of light based on direction
2Object-generated harmful factors
If screens with slots are used to block parasitic reflections, then undesired side emissions are reduced, but the device complexity increases
Solution Approach 1:
The screen is segmented into multiple slots rather than being a single continuous opening. This segmentation allows the screen to selectively transmit light in specific directions while blocking light in other directions, achieving parasitic reflection reduction through geometric segmentation rather than complex materials or mechanisms
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 effectively reduces parasitic reflections, ensuring a more focused and desired light distribution without unwanted side emissions or smears, enhancing the design and functionality of lighting fixtures.
Implementation Method 1
slots which allow the passage of the main direct light flow, emitted by said punctiform light sources, and to prevent the passage of any secondary light flows due to reflection phenomena affecting said main light flow
Data Source
AI summary
A device adapted to perform the shaping of light beams emitted by lighting fixtures, in particular by lighting fixtures comprising punctiform light sources such as, for example, LEDs. The device according to the present invention, in particular, allows shaping the light flow produced by lighting devices comprising punctiform light sources, so as to filter any parasitic reflection phenomena of the light flow emitted.