Addressable Multi-Segment LED for Compact Color Mixing
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Solution Overview
Problem
Current color-changing LED technologies face challenges in achieving efficient color mixing and optical control due to the need for multiple LEDs and primary optics, which increases size, cost, and complexity, while also limiting form factor and aesthetic appeal.
Innovation Solution
A color-changing light-emitting device package with a single LED die composed of multiple segments emitting different colors, allowing for efficient color mixing outside the die, reducing the need for multiple optics and enabling better optical control with a smaller form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple individual LEDs of different colors are placed under a single primary optic, then color changing capability is achieved, but color mixing efficiency deteriorates and beam control worsens
Solution Approach 1:
The LED die is divided into multiple segments, each emitting a different color (e.g., red, green, blue segments). This segmentation allows each segment to be independently controlled and mixed outside the die, resolving the color mixing inefficiency while maintaining color changing capability.
Solution Approach 2:
A single primary optic acts as an intermediary element that receives light from all colored segments and performs the color mixing function externally. This mediator approach allows efficient color mixing while maintaining good beam control, unlike placing multiple LEDs directly under the optic.
2Ease of operation
If multiple individual LEDs of different colors are each placed under their own primary optic, then each LED has dedicated optical control, but the number of optics increases and aesthetic appeal deteriorates
Solution Approach 1:
Multiple colored segments are merged into a single LED die structure and controlled by a single primary optic. This combining approach reduces the number of optics from multiple to one, simplifying the device while maintaining optical control capability through segment-level addressing.
Solution Approach 2:
The single primary optic serves multiple functions by receiving and mixing light from all colored segments simultaneously. This multi-functional optic replaces multiple dedicated optics, reducing device complexity while maintaining versatile optical control.
3Adaptability or versatility
If multiple individual LEDs are used to achieve color changing, then color tuneability is achieved, but the form factor increases
Solution Approach 1:
Multiple colored LEDs are merged into a single multi-segment LED die, dramatically reducing the form factor from multiple discrete components to one integrated device while preserving full color tuneability through independent segment control.
Solution Approach 2:
The LED die uses a composite structure with multiple semiconductor materials emitting different colors (e.g., different AlGaInP or InGaN compositions) integrated into a single die. This composite approach enables color changing in a compact form factor.
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 solution allows for improved optical control, reduced cost, and a smaller form factor by enabling efficient color mixing and beam steering with fewer components, while maintaining high color tuneability and dynamic lighting effects.
Implementation Method 1
A LED die is divided into a number of segments, each emitting a different color
Data Source
AI summary
A light-emitting device package includes a metalized substrate, a light-emitting diode (LED) die, and a single primary optic. The metalized substrate includes a top surface, pads on the top surface, and traces extending from the pads. The LED die is mounted on the pads of the metalized substrate. The LED die includes individually addressable segments. Each segment includes one or more junctions. The primary optic is located over the LED die.