Light Guide Plate Directed Beam Injection for Glare Reduction
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Solution Overview
Problem
Existing luminaire designs with light-guiding plates suffer from unfavorable light distributions and glare issues due to non-directed light coupling and decoupling, which cannot be effectively controlled without additional optical components.
Innovation Solution
A luminaire with a flat light-guiding plate featuring directed coupling structures on one side and elongated decoupling structures on the other, oriented to redirect light in a defined manner, allowing for controlled light deflection and extraction without additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If straight, continuous coupling structures are used to couple light into the light guide plate, then light coupling is simple and broad, but the light distribution becomes unfavorable and glare occurs due to non-directed coupling
Solution Approach 1:
The coupling structures are segmented into multiple individual elements (e.g., multiple LEDs or light sources) arranged in specific patterns rather than a single continuous source. This segmentation allows each element to couple light in specific directions, creating controlled beam bundles that reduce glare while maintaining manufacturing simplicity
Solution Approach 2:
Different regions of the coupling structures have different properties - some areas are designed to couple light at specific angles while others couple at different angles. This local differentiation of coupling characteristics enables tailored light distribution patterns that eliminate glare in specific directions while maintaining overall simplicity
2Object-affected harmful factors
If additional optical components such as diaphragms or optical plates are added to control glare, then light distribution is improved, but device complexity and cost increase
Solution Approach 1:
The light guide plate itself is designed to perform multiple functions: it guides light, controls distribution patterns, and eliminates glare - all without requiring separate dedicated components. The coupling structures are designed to simultaneously achieve light input and glare control in a single integrated system
Solution Approach 2:
The light guide plate's geometry and coupling structure design inherently control the light distribution and eliminate glare through its own structure, without needing external diaphragms or optical plates. The system serves its own glare control needs through its fundamental design rather than additional components
3Illumination intensity
If decoupling structures are used to redirect light for homogeneous distribution, then light extraction is improved, but the angular range coverage remains insufficient leading to light concentration in certain directions
Solution Approach 1:
The coupling structures employ asymmetric arrangements of light sources or asymmetric coupling geometries that inherently direct light into specific angular ranges. This asymmetry prevents uniform distribution in all directions and instead concentrates light in controlled angular sectors, eliminating the harmful concentration effect while maintaining homogeneity in the illuminated 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
This configuration achieves a homogeneous light distribution and effective glare reduction, eliminating the need for extra optical aids, thereby reducing costs and enhancing design flexibility.
Implementation Method 1
The light then spreads in the light guide plate by means of total reflection
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
The present invention relates to a planar light guide plate (100) for a lamp, comprising: two planar sides (101, 102), which are connected to each other by a circumferential end face (103), injection patterns (200), which are provided on the end face (103) and are designed to inject light from the outside into the light guide plate (100), and outcoupling patterns (300), which are provided on one of the planar sides (101, 102) to deflect the light injected into the light guide plate (100) through the injection patterns (200) in such a manner as to couple the light out of the light guide plate (100) through one of the planar sides (101, 102), wherein the injection patterns (200) are designed such that the injected light is injected as a directed beam bundle (400) and the outcoupling patterns (300) have an elongate shape and extend by their longitudinal axis substantially in the planar plane of the light guide plate (100).