LED Side Emission via Embedded Reflective Transparent Layer
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Solution Overview
Problem
Conventional LED packaging designs for achieving 'bat-wing' light illumination are overly complex and bulky, failing to efficiently direct light emission from the side of the device.
Innovation Solution
A light emitting diode device with a multi-layer stack, a transparent layer, and a reflective surface adjacent to the transparent layer to redirect light emissions away from the primary direction, enhancing side emission without the need for intricate optical designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional optical designs are used to achieve bat-wing illumination, then side light emission is enhanced, but device complexity and packaging size increase
Solution Approach 1:
The patent merges the light extraction function and side emission enhancement into a single integrated transparent layer with embedded reflective surfaces, eliminating the need for separate optical components and complex packaging structures while achieving the desired bat-wing illumination pattern
Solution Approach 2:
The transparent layer acts as an intermediary element between the LED chip and the external environment, using embedded reflective surfaces to redirect light paths and achieve side emission enhancement without requiring complex external optical designs
2Illumination intensity
If conventional optical designs are used to achieve bat-wing illumination, then side light emission is enhanced, but packaging volume increases
Solution Approach 1:
The patent combines multiple functions (light extraction, light redirection, and side emission enhancement) into a single transparent layer structure, significantly reducing the overall packaging volume compared to conventional designs that require multiple separate optical components
Solution Approach 2:
The patent utilizes the vertical dimension by embedding reflective surfaces within the transparent layer to redirect light paths, achieving side emission enhancement without increasing the horizontal packaging footprint
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 configuration allows for a compact LED device with controlled side light emission, reducing packaging complexity and achieving a desired 'bat-wing' illumination pattern without the need for complex optical designs.
Implementation Method 1
a reflective surface formed at or adjacent the second surface of the transparent layer for directing at least a portion of the emitted light in a direction away from the primary emission direction
Data Source
AI summary
A light emitting diode device includes a multi-layer stack of materials including a p-layer, a n-layer, and a light generating region for emission of light in a primary emission direction towards one of the p- and n-layers; a substantially transparent layer located at or adjacent said one of the p- and n-layers, having a first surface facing said one of the p- and n-layers and an opposed second surface; and a reflective surface formed at or adjacent the second surface of the transparent layer for directing at least a portion of the emitted light in a direction away from the primary emission direction so as to enhance light emission from a side of the light emitting diode device.