Light-emitting Device Air Cavity for Warm White LED
Solution Overview
Problem
Conventional LED flexible lighting strips typically produce cold color temperatures and insufficient illumination due to direct encapsulation of the light source, limiting their ability to meet user requirements for warm white light and high lumen output.
Innovation Solution
A light-emitting device design featuring an encapsulation housing with a cavity between the light engine and the encapsulation material, allowing the light to enter the cavity first before exiting, which reduces the influence of the encapsulation material on color temperature and includes a flexible structure for full-sealing and high lumen output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light source is directly encapsulated with flexible material, then waterproof and dustproof effects are achieved, but the color temperature becomes biased to cold light and lumen output is insufficient
Solution Approach 1:
An air cavity is introduced as an intermediary space between the light source and the encapsulation material. This cavity prevents direct contact between the light source and encapsulation material, allowing the light to maintain its original color temperature and lumen output while the encapsulation material still provides waterproof and dustproof protection.
2Reliability
If the light source is directly encapsulated with flexible material, then full-sealing is achieved, but the illumination strength is insufficient
Solution Approach 1:
The air cavity serves as a mediator that allows the encapsulation material to provide full-sealing protection without directly absorbing or blocking the light from the light source, thereby maintaining high illumination strength.
3Device complexity
If the light source is directly encapsulated with flexible material, then the structure is simple, but the color temperature cannot be adjusted to warm white
Solution Approach 1:
The air cavity acts as a simple intermediary structure that prevents the encapsulation material from directly affecting the light's color temperature, enabling the achievement of warm white color temperature without complex additional components.
Data Source
AI summary
Various embodiments may relate to a light-emitting device. The light-emitting device includes an encapsulation housing and a light engine arranged in the encapsulation housing. The light engine is arranged in the encapsulation housing in such a manner that a cavity is formed between the light engine and the encapsulation housing. At least the exit surface of a light source arranged on one side of the light engine is located in the cavity.