LED Light Bar Uniform Illumination via Inverted Emission
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Solution Overview
Problem
Existing decorative light strips, both front-emitting and side-emitting types, suffer from uneven light emission, with centers being brighter than edges, leading to inconsistent illumination.
Innovation Solution
The LED light bar incorporates a flexible light shielding sleeve, a flexible scattering layer, and a flexible light strip, where the light emitting direction of the flexible light strip is opposite to the illumination direction of the LED light bar. This configuration allows LED light to undergo multiple reflections and refractions within the flexible scattering layer, enhancing light reflection efficiency and achieving uniform illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the light emitting direction of the light strip is consistent with the light-output direction of the light bar (front-emitting type), then the structure is simple, but the light emission becomes uneven with the center being brighter than edges
Solution Approach 1:
The patent inverts the light emission direction by making the light strip emit light in the opposite direction to the light-output direction of the light bar. The light emitting direction of the flexible light strip is opposite to the illumination direction of the LED light bar, causing light to travel through the flexible scattering layer from back to front, which enables uniform light distribution across the light-emitting surface.
Solution Approach 2:
The patent introduces a flexible scattering layer as an intermediary between the light strip and the light-output direction. This scattering layer contains multiple light guiding walls and a scattering wall that redirect and distribute light uniformly, acting as a mediator that transforms the directional light from the LED strip into uniform omnidirectional illumination.
2Illumination intensity
If the light emitting direction of the light strip is perpendicular to the light-output direction of the light bar (side-emitting type), then the light emission uniformity is improved, but the structure becomes more complex with additional reflective films and angled arrangements
Solution Approach 1:
Instead of using the conventional side-emitting configuration with perpendicular arrangement and reflective films, the patent inverts the approach by having the light strip emit light in the opposite direction to the light-output direction, achieving uniform illumination through the scattering layer without requiring complex reflective structures.
Solution Approach 2:
The flexible scattering layer serves as an intermediary that replaces the need for complex reflective films and angled arrangements. The light guiding walls and scattering wall within this layer uniformly distribute light without requiring the light strip to be positioned at specific angles or equipped with additional reflective components.
3Ease of manufacture
If a light shielding sleeve is added to prevent light emission from bottom and side walls, then light is emitted only from one end, but the light emitting surface becomes brighter at one side and dark at another side
Solution Approach 1:
The flexible scattering layer acts as an intermediary between the light strip and the external environment, uniformly distributing light that would otherwise concentrate on one side. The multiple light guiding walls and scattering wall redirect light paths to ensure even illumination across the entire light-emitting surface, preventing one-sided brightness issues.
Solution Approach 2:
The patent applies local quality by creating different optical paths within the scattering layer. The light guiding walls and scattering wall are strategically positioned to redirect light to different areas, ensuring that each region of the light-emitting surface receives appropriate light distribution for uniform illumination.
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 a more uniform and softer illumination effect, preventing centers from being excessively brighter than edges, thus offering improved lighting consistency and aesthetic appeal.
Implementation Method 1
The LED light emitted by the flexible light strip undergoes multiple direct paths and refractions within the flexible scattering layer
Implementation Method 2
a light reflecting surface of the flexible light shielding sleeve improves light reflection efficiency
Data Source
AI summary
A light-emitting diode (LED) light bar capable of refracting and scattering LED light and a flexible neon lamp are provided. The LED light bar includes a flexible light shielding sleeve, a flexible scattering layer, and a flexible light strip. The flexible light shielding sleeve extends along the LED light bar, the flexible light strip is disposed in the flexible scattering layer. A light emitting direction of the flexible light strip is opposite to an illumination direction of the LED light bar. The flexible scattering layer extends along the flexible light shielding sleeve and is disposed between the flexible light strip and the flexible light shielding sleeve. The LED light emitted by the flexible light strip undergoes multiple reflections and refractions within the flexible scattering layer, and a light reflecting surface of the flexible light shielding sleeve is additionally provided to improve light reflection efficiency.