Transparent Carrier Light-Mixing Zone for LED Uniformity
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Solution Overview
Problem
Existing methods for improving light-mixing efficiency in LEDs, such as using customized optical lenses or encapsulating light-mixing materials with resin, are complex and costly, and do not effectively shorten the light-mixing distance.
Innovation Solution
A light-mixing type light-emitting apparatus featuring a transparent carrier with a light-mixing zone and a plurality of LEDs, where the LEDs are attached through a transparent adhesive layer and a reflecting layer to enhance light mixing and extraction efficiency, allowing for uniform mixing of light beams into a specific color like white light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If customized optical lenses are used to redirect light for enhancing light extraction efficiency, then light-mixing efficiency is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts the light-mixing function from complex optical lenses and separates it into independent light-mixing elements that can be independently positioned and adjusted, eliminating the need for customized lens design while maintaining light-mixing efficiency
Solution Approach 2:
The patent divides the light-mixing system into multiple discrete light-mixing elements arranged in an array, allowing independent optimization of each element's position and orientation to achieve uniform light mixing without requiring complex integrated optical designs
2Productivity
If light-mixing materials are encapsulated with resin to scatter light randomly, then light-mixing efficiency is improved, but manufacturing process complexity and cost increase
Solution Approach 1:
The patent removes the resin encapsulation step and light-mixing material dispersion process, replacing them with discrete light-mixing elements that achieve light scattering and mixing through their geometric structure and positioning rather than through material dispersion
Solution Approach 2:
The patent replaces the chemical/material-based light-mixing approach (dispersing light-mixing materials in resin) with a geometric/optical approach using precisely positioned light-mixing elements, simplifying the manufacturing process while maintaining light-mixing effectiveness
3Device complexity
If conventional LED arrangements are used without dedicated light-mixing mechanisms, then device complexity is reduced, but light-mixing distance increases and uniformity decreases
Solution Approach 1:
The patent incorporates light-mixing elements at predetermined positions between the LED array and the exit surface, performing light mixing in advance before light exits the device, thereby achieving uniform light output over a shorter distance without adding complex post-processing mechanisms
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 achieves high light-mixing efficiency, reduces the mixing distance, and is applicable to high-voltage electrical apparatuses and direct-type backlight sources, enabling increased display area and reduced thickness in flat display applications.
Implementation Method 1
The transparent carrier provides a light-mixing zone underlying the plurality of LEDs for the light beams emitted from the plurality of LEDs to mix uniformly
Implementation Method 2
a reflecting layer to enhance light mixing and extraction efficiency
Data Source
AI summary
A light-mixing type light-emitting apparatus comprises a plurality of light-emitting diodes (LEDs) formed on a transparent carrier, wherein each of the LEDs with a transparent substrate emits light of a distinct color when driven, and the light beams generated from the LEDs are mixed to form a specific color. The transparent carrier setting forth in the present invention provides a mixing zone underlying the plurality of LEDs for the light beams to mix uniformly so as to improve the light-mixing efficiency of the light-emitting apparatus and shorten the mixing distance.