Light Module Edge Illumination Uniformity
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Solution Overview
Problem
Conventional light modules with edge light sources struggle to create a uniform large illuminating area, as gaps between joined modules can cause visual disturbances due to uneven light intensity and visible edges.
Innovation Solution
A light module design featuring a light guide plate with a light bar and reflector, where the light bar is positioned on one edge to provide an edge light source and a reflector on the opposing edge to reflect light back, creating a uniform illumination and making the edge invisible, allowing multiple modules to be joined seamlessly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple light modules are joined together to create a large illuminating area, then the area coverage is improved, but gaps and visual disturbances occur at the joined edges
Solution Approach 1:
The patent applies local quality by positioning the light bar specifically at one edge of the light guide plate and the reflector at the opposite edge, creating localized light injection and reflection zones. This localized arrangement ensures that light is uniformly distributed across the entire surface, including the edges where modules join, thereby eliminating visible gaps and visual disturbances while maintaining large area coverage.
2Productivity
If a light bar is positioned at one edge to provide edge light source, then light injection efficiency is improved, but light intensity distribution becomes uneven without reflector
Solution Approach 1:
The patent implements feedback by placing the reflector at the edge opposite the light bar to bounce light back toward the light bar region. This creates a feedback loop where light that would otherwise be lost at the opposite edge is reflected back into the system, ensuring uniform light intensity distribution across the light guide plate while maintaining efficient light injection at the light bar position.
3Area of stationary object
If edge light source is used to create planar light distribution, then large illuminating area is achieved, but the edge itself becomes visible and disruptive
Solution Approach 1:
The patent applies the taking out principle by extracting the light bar from the visible edge region and positioning it at the bottom edge of the light guide plate, while using the reflector to redirect light away from the top edge. This extraction of the light source from the visible edge area, combined with strategic light reflection, eliminates the visible edge effect while preserving the large planar illuminating area.
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 ensures uniform light distribution across a large area, reducing the visibility of edges and gaps between modules, resulting in a more consistent and aesthetically pleasing illumination.
Implementation Method 1
a light guide plate 122... The light guide plate has a first edge surface, a second edge surface, and a top surface
Implementation Method 2
The reflector is disposed on the second edge surface to reflect light back to a region above the light bar
Implementation Method 3
The light bar has a plurality of light-emitting devices
Data Source
AI summary
A light module includes a light guide plate, a light bar, and a first reflector. The light guide plate has a first edge surface, a second edge surface, and a top surface serving as a light-outgoing surface. The light bar is disposed on the first edge surface for providing an edge light source into the light guide plate. The light bar has a plurality of light-emitting devices. The first reflector is disposed on the second edge surface to reflect light back to a region above the light bar.