Light Emitting Device Protruding Portions Light Distribution
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Solution Overview
Problem
Conventional light-emitting devices require external components like secondary lenses, reflectors, and prisms to control light distribution, which increases complexity and size.
Innovation Solution
Incorporating transparent protruding portions with light guide and light distribution control elements on the light-emitting surface, featuring asymmetric and tilted surfaces to internally manage light distribution through total internal reflection, eliminating the need for external components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If external components (secondary lenses, reflectors, prisms) are used to control light distribution, then light distribution control is achieved, but device complexity and size increase
Solution Approach 1:
The patent merges the light distribution control function directly into the light-emitting element by forming protruding portions with light guide portions and light distribution control portions on the light-emitting surface. This integration eliminates the need for separate external components like secondary lenses, reflectors, and prisms, thereby reducing device complexity while maintaining effective light distribution control through the asymmetric tilted surfaces of the protruding portions
Solution Approach 2:
The light-emitting element performs its own light distribution control function through the protruding portions formed on its light-emitting surface. The asymmetric tilted surfaces of these protruding portions enable the element to independently control light emission patterns without requiring external control components, allowing the device to serve itself in the light distribution control task
2Reliability
If external components are added to control light distribution, then light emission control is improved, but the number of components increases
Solution Approach 1:
The patent combines multiple functions (light emission and light distribution control) into a single integrated light-emitting element structure. The protruding portions with asymmetric tilted surfaces are formed directly on the light-emitting surface, eliminating the need for separate external control components and reducing the total component count while ensuring stable light emission patterns
Solution Approach 2:
The light-emitting element is designed to perform multiple functions simultaneously: it generates light and controls its distribution pattern. The protruding portions with specific geometric configurations enable the element to function both as a light source and as a light distribution controller, reducing the need for additional specialized components
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 internal light distribution control reduces component count, simplifies the device configuration, and stabilizes light emission patterns, achieving high intensity in designated directions while minimizing fluctuations.
Implementation Method 1
The tilted surface is tilted with respect to the central axis of the light guide portion... internally manage light distribution through total internal reflection
Data Source
AI summary
A light-emitting device includes a light-emitting element having a light-emitting surface, and a plurality of protruding portions being separated from each other and disposed on the light-emitting surface. The protruding portions are transparent. Each of the protruding portions includes a light guide portion and a light distribution control portion. The light guide portion has a columnar configuration and is provided at a light-emitting surface side of the protruding portion. The light distribution control portion is provided on the light guide portion. The light distribution control portion is asymmetric with respect to a central axis of the light guide portion and has a tilted surface that is tilted with respect to the central axis.