LED Optical Element Structure for Light Field Distribution Control
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Solution Overview
Problem
Existing light-emitting devices using LEDs face challenges in efficiently directing and distributing light, leading to suboptimal light extraction and field control.
Innovation Solution
A light-emitting device comprising a semiconductor light-emitting element, a transparent support element, an optical element with specific portions and layers, and a conductive adhesive material with nano-particles, which together enhance light field distribution and extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If additional optical components are added to the package to adjust the light field, then the light field control is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple optical functions (light extraction enhancement, light field adjustment, and directional control) into a single integrated optical element. This optical element includes a light extraction structure with reflective surfaces and light field adjustment structures with specific geometric shapes, eliminating the need for separate reflection boards and optical films, thus reducing device complexity while maintaining improved light field control
Solution Approach 2:
The optical element serves multiple functions simultaneously: it acts as a reflection board to enhance light extraction, contains light field adjustment structures to control light distribution, and provides directional control through its geometric design. This multi-functionality reduces the number of components needed while achieving comprehensive light management
2Illumination intensity
If the light emitting surface area is increased to improve light output, then the light extraction is improved, but the volume of the light-emitting chip increases
Solution Approach 1:
The patent enhances light extraction by adding vertical dimension features to the light emitting surface, specifically microlens arrays and light field adjustment structures with specific geometric shapes. These three-dimensional structures increase the effective light extraction area without significantly increasing the horizontal chip footprint, thus improving light output while maintaining compact chip volume
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 improved light field distribution with a maximum corresponding to one portion and a minimum corresponding to another, enhancing light extraction and directional control.
Implementation Method 1
the optical element comprises a first portion and a second portion... the first light passes through the optical element to form a second light
Implementation Method 2
add an optical element, such as a reflection board, on the side of an LED opposing to the side of light emitting surface to increase the reflection
Implementation Method 3
a conductive adhesive material connecting to the intermediate layer... has a thickness larger than 20 μm
Data Source
AI summary
The present application discloses a light-emitting device comprises a semiconductor light-emitting element, a transparent element covering the semiconductor light-emitting element, an insulating layer which connects to the transparent element, an intermediate layer which connects to the insulating layer; and a conductive adhesive material connecting to the intermediate layer.