LED Projection Module Waveguide Indentations
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Solution Overview
Problem
Existing LED projection modules face difficulties in creating clear transitions between light and dark areas in partial-light distributions, and achieving good superimposition of individual light exposures in full light distributions, leading to inhomogeneities and poor homogeneity.
Innovation Solution
The optical waveguides for individual LED light sources are arranged laterally side by side to form a common total-light optical waveguide with indentations between them, allowing light to pass over and creating a total-light outlet surface that can be divided into sub-areas for clear definition, with indentations configured to prevent light interference between adjacent waveguides, enabling precise control of light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple LED light sources are arranged to produce partial-light distributions, then selective illumination and masking capabilities are improved, but clear vertical transitions between light and dark areas cannot be achieved
Solution Approach 1:
The optical waveguide is divided into multiple laterally arranged segments, each corresponding to a specific LED light source. These segmented waveguides can be independently activated or deactivated, enabling precise control over light distribution patterns and clear vertical transitions between illuminated and masked areas.
Solution Approach 2:
Absorptive elements are introduced as intermediary components between adjacent optical waveguides. These elements prevent lateral light propagation between neighboring waveguide segments, ensuring that light from each LED source remains confined to its designated area and producing sharp vertical boundaries in the light distribution.
2Adaptability or versatility
If multiple LED light sources project light through individual optical waveguides, then partial-light distributions can be produced, but good superimposition of light exposures for full light distribution is difficult achieving
Solution Approach 1:
The optical waveguide system is segmented into multiple laterally arranged waveguides, each handling light from a specific LED source. This segmentation allows independent control of each light source while maintaining proper optical alignment, enabling both partial-light distributions and homogeneous full light distribution through selective activation.
Solution Approach 2:
Multiple optical waveguides are laterally arranged and optically combined to form a unified light distribution system. The waveguides are positioned and configured so that their light outputs can be properly superimposed by the projection lens, achieving homogeneous illumination when all sources are activated while maintaining the flexibility for partial-light distributions.
3Productivity
If individual light outlet surfaces are arranged side by side to form total-light outlet surface, then full light distribution can be produced, but gaps between surfaces cause inhomogeneities in light exposure
Solution Approach 1:
Absorptive elements are placed in the gaps between adjacent light outlet surfaces to prevent light from one waveguide from leaking into adjacent areas. These intermediary elements eliminate the inhomogeneities caused by gaps while maintaining the efficient light output of each individual waveguide.
Solution Approach 2:
The gaps between light outlet surfaces are treated differently from the illuminated areas. By applying absorptive material specifically in the gap regions, the patent creates local quality differences that prevent unwanted light propagation while preserving the homogeneous appearance of the overall light distribution.
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 solution allows for clear vertical light/dark borders and improved homogeneity in light exposure, enabling the production of desired light distributions with defined sub-areas that can be activated or deactivated independently, reducing inhomogeneities and enhancing the control over light distribution patterns.
Implementation Method 1
the optical waveguides for the individual LED light sources are arranged laterally side by side in a horizontal plane and border one another directly or preferably form a common total-light optical waveguide, such that light can pass over between adjacent optical waveguides
Implementation Method 2
the exiting light is projected by means of a projection lens into the outside space to form at least one light distribution
Data Source
AI summary
An LED projection module (1) includes two or more LED light sources which each consist of one or more light-emitting diodes that couple light via a light coupling-in point associated therewith into an optical waveguide. Light exits from the optical waveguides via a light decoupling point. The exiting light is projected by a projection lens to form at least one light distribution. The optical waveguides for the individual LED light sources are arranged laterally side by side in a horizontal plane and border one another directly such that light can pass over between adjacent optical waveguides. The individual light outlet surfaces are arranged side by side and form a total-light light outlet surface. One or more indentations are provided in the total-light light outlet surface, between the individual light outlet surfaces, and in each case extend at least over part of the vertical extension of the total-light light outlet surface.