Multi-Region LED Structure for Beam Angle and CCT Control
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Solution Overview
Problem
Existing light emitting modules struggle with controlling beam angle and achieving variable correlated color temperature (CCT) due to the use of a single wavelength conversion layer on a single LED chip.
Innovation Solution
A light emitting diode with multiple light emitting regions, each independently controllable, and a wavelength conversion layer that includes different phosphors to emit light with varying color temperatures, allowing for adjustable beam angle and color temperature through independent operation of these regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single wavelength conversion layer is used on a single LED chip, then the device structure is simple, but the beam angle control and color temperature variability are poor
Solution Approach 1:
The patent divides the LED device into multiple light emitting regions (first light emitting region and second light emitting region) with different wavelength conversion layers. Each region can be independently controlled to emit light with different color temperatures, enabling beam angle and color temperature control while maintaining a unified device structure.
Solution Approach 2:
Different wavelength conversion layers with distinct phosphor compositions are applied to different light emitting regions. The first wavelength conversion layer contains phosphors for warm white light (2,300K-3,500K) while the second wavelength conversion layer contains phosphors for cool white light (4,500K-6,500K), allowing each region to have specialized optical properties for its intended function.
2Adaptability or versatility
If multiple light emitting regions with different wavelength conversion layers are used, then beam angle and color temperature control are improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple light emitting regions and their corresponding wavelength conversion layers into a single integrated LED device structure. Both regions share common components including the LED chip, substrate, and encapsulation, reducing overall device complexity while maintaining the ability to independently control each region's light output.
Solution Approach 2:
The single LED device structure serves multiple functions by incorporating both warm white and cool white light emitting regions. The device can operate in multiple modes (warm white only, cool white only, or mixed) and can control beam angle by selectively activating different regions, making it a multi-functional lighting solution.
3Adaptability or versatility
If multiple wavelength conversion layers with different phosphors are used, then variable color temperature is achieved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies different wavelength conversion layers to different light emitting regions during the manufacturing process before final assembly. The phosphor materials are pre-selected and positioned on specific regions of the LED chip, allowing for efficient batch production while ensuring each region has the correct phosphor composition for its intended color temperature output.
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
Enables precise control over beam angle and color temperature, facilitating miniaturization and efficient mixing of light with different color temperatures.
Implementation Method 1
a wavelength conversion layer covering the first light emitting region and the second light emitting region
Implementation Method 2
The wavelength conversion layer may include phosphors having substantially the same composition at portions corresponding to the first light emitting region and the second light emitting region
Implementation Method 3
Each of the first light emitting region and the second light emitting region may include a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer
Data Source
AI summary
A light device including a substrate, and first and second light emitters spaced apart from each other, and a power source to control the first light emitter and the second light emitter, in which the first and second light emitters include a light emitting region, a wavelength conversion layer disposed on the light emitting region, and a lateral reflection layer covering a region of a side of the light emitting region and the wavelength conversion layer, the first light emitter and the second light emitter are configured to output the same or different magnitudes of power by receiving the same or different magnitudes of current, the first and second light emitters are respectively configured to emit first light and second light, the first light emitter is electrically connected to the second light emitter through a common electrode.