LED Lighting Device Parallel Plate Channel Diffuser
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Solution Overview
Problem
Current LED lighting in motor vehicles often results in inhomogeneous illumination and can be blinding, failing to meet regulatory standards for uniformity and performance across different lighting applications.
Innovation Solution
A lighting device featuring LEDs arranged on a PCB with parallel opaque plates forming a channel, where the LEDs emit light perpendicular to the plates, creating a channel that diffuses and disperses the light before it exits, enhancing homogeneity and reducing blinding effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LEDs are used as direct light sources in motor vehicle lighting, then energy efficiency and brightness are improved, but illumination uniformity deteriorates and blinding effects increase
Solution Approach 1:
The patent introduces an optical intermediary element (diffuser plate or light guide) between the LED light source and the target area. This intermediary component receives the direct LED light and redistributes it uniformly across the desired area, eliminating the blinding effect while maintaining energy efficiency. The diffuser plate scatters the concentrated LED light into a broader, more uniform illumination pattern.
Solution Approach 2:
The patent transitions from point-source direct illumination to a planar light distribution system. By using a light guide or diffuser plate with specific geometric features (such as prisms, diffusers, or waveguide structures), the light is redistributed across a two-dimensional area rather than projecting in a concentrated beam, achieving uniform illumination while maintaining LED energy efficiency.
2Use of energy by stationary object
If LED lighting is used in motor vehicles, then energy consumption is reduced, but light diffusion and homogeneity deteriorate
Solution Approach 1:
The patent employs optical intermediary components such as diffuser plates, light guides, or integrating cavities that receive concentrated LED light and transform it into uniformly diffused illumination. These intermediaries ensure that the energy-efficient LED source produces homogeneous light distribution across the entire illuminated area, solving the diffusion problem while maintaining low energy consumption.
Solution Approach 2:
The patent modifies the optical parameters of the light distribution system by introducing elements with specific refractive indices, surface geometries, or scattering properties. These parameter changes enable the system to transform the directional LED light into omnidirectional or uniformly distributed light, achieving good diffusion while maintaining the energy efficiency of LED sources.
3Device complexity
If direct LED illumination is implemented, then device simplicity is improved, but illumination homogeneity and user comfort worsen
Solution Approach 1:
The patent introduces an optical intermediary (diffuser or light guide) that acts as a buffer between the LED source and the user's eye. This intermediary softens the direct light beam, scattering it into a gentler, more uniform illumination that eliminates the blinding effect while adding minimal complexity to the overall device structure.
Solution Approach 2:
The patent transforms the concentrated one-dimensional LED beam into a two-dimensional or three-dimensional light distribution pattern. By using light guides with specific cross-sectional geometries or diffuser plates with varied surface structures, the light is spread across multiple dimensions, reducing intensity concentration and eliminating blinding effects with minimal added complexity.
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 homogeneous and less blinding lighting experience by diffusing and dispersing the light within the channel, resulting in a more uniform and less tiring illumination for users.
Implementation Method 1
the spatial diffusion of the emitted light is improved
Implementation Method 2
parallel opaque plates forming a channel, where the LEDs emit light perpendicular to the plates, creating a channel that diffuses and disperses the light
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a lighting device, in particular for a motor vehicle, comprising LEDs secured to a printed circuit board (PCB). The device is characterised in that a system is positioned substantially perpendicularly to the LEDs (5) in front of the illuminating face of the LED, said system comprising parallel opaque plates (1, 2), of which at least one of the faces is a light colour, preferably white. According to the invention, at least two of the aforementioned parallel plates rest on the PCB (4) and/or on the periphery thereof, on each side of at least one LED borne by said PCB, such as to define a channel having a base in which the LEDs are distributed; the wall-forming plates are deployed substantially perpendicularly to the mid-plane of the PCB such as to channel the light emitted by the LEDs, which leaves the device on the side of the plates opposite the above-mentioned side resting on or around the PCB; and the at least one light-coloured or white face of the plates faces into the channel.