Ceiling Lighting Strip with Segmented Optical Redistribution
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Solution Overview
Problem
Conventional solid state lighting strips used in ceiling illumination are aesthetically undesirable as they appear as dark stripes when viewed from below, and they often result in direct and uncomfortable illumination due to their positioning within the ceiling.
Innovation Solution
A lighting strip with an L- or T-shaped carrier carrying solid state lighting elements, featuring a first optical arrangement for redistributing luminous output towards the target surface and a second optical arrangement for diffusing output away from the surface, minimizing visibility and glare, allowing for aesthetically pleasing light patterns while maintaining efficient illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If lighting strips are positioned within the ceiling to provide direct illumination, then illumination efficiency is improved, but aesthetic appearance deteriorates (dark stripes visible from below)
Solution Approach 1:
The lighting strip is segmented into multiple independent light-emitting sections along the carrier, with each section having its own optical arrangement. This allows different portions of light to be redirected in different directions (towards and away from the target surface), resolving the contradiction between efficient direct illumination and aesthetic appearance by making the strip invisible from below while maintaining illumination effectiveness
Solution Approach 2:
Optical arrangements (lenses, reflectors, or diffusers) are introduced as intermediary elements between the SSL elements and the target surface. These intermediaries redirect light paths so that light can be efficiently delivered to the target surface while preventing direct line-of-sight to the light source from below, thus eliminating the dark stripe appearance while maintaining illumination efficiency
2Shape
If lighting strips are suspended below the ceiling to hide them from view, then aesthetic appearance is improved, but illumination efficiency deteriorates (light must travel further and reflect off surface)
Solution Approach 1:
The lighting strip is mounted in a different spatial dimension (within the ceiling plane rather than suspended below it), allowing light to be redirected at various angles towards the target surface. This dimensional repositioning combined with optical arrangements enables the strip to remain invisible from below while maintaining short light paths and high illumination efficiency
Solution Approach 2:
Optical arrangements serve as intermediaries that decouple the position of the light source from the direction of light delivery. This allows the lighting strip to be positioned within the ceiling (hiding it from below) while still delivering light efficiently to the target surface through controlled redirection, eliminating the need for suspension below the ceiling
3Shape
If SSL elements are directed towards the ceiling to create luminous patterns, then aesthetic effects are improved, but comfort deteriorates (direct illumination perceived as bright and uncomfortable)
Solution Approach 1:
Different regions of the lighting strip are equipped with different optical arrangements tailored to their specific functions. Some sections have optics optimized for creating luminous patterns on the ceiling, while other sections have optics designed to redirect light away from direct viewer exposure. This local differentiation allows aesthetic luminous patterns to be created while preventing uncomfortable direct illumination in occupied spaces
Solution Approach 2:
Optical arrangements act as intermediaries that control and modify light directionality. By introducing these intermediaries, light can be redirected towards the ceiling to create aesthetic patterns while being simultaneously redirected away from direct exposure to occupants, thus achieving both aesthetic effects and visual comfort
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 provides unobtrusive and aesthetically pleasing surface illumination by redistributing light to create desired patterns on the target surface while minimizing the visibility of the lighting strip and reducing glare, enhancing the comfort and visual appeal of the illuminated space.
Implementation Method 1
a first optical arrangement along said elongation direction and being in axial direction if in front of the light source for creating a first redistribution of a first portion of the luminous output of said solid state lighting elements
Implementation Method 2
the at least one cross-bar being a second optical arrangement along said elongation direction for creating a second redistribution of a second portion of the luminous output of said solid state lighting elements
Data Source
AI summary
A lighting strip (10) is disclosed comprising a carrier (11) carrying, on at least one of its major surfaces (13), a plurality of solid state lighting elements (15) distributed along an elongation direction of said carrier; a first optical arrangement (21) along said elongation direction for creating a first redistribution of a first portion of the luminous output of said solid state lighting elements; and a second optical arrangement (23) along said elongation direction for creating a second redistribution of a second portion of the luminous output of said solid state lighting elements, wherein the first redistribution is different to the second redistribution. A surface illumination kit including a plurality of such lighting strips is also disclosed.