Multizone Mixing Cup for LED Light Blending
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Solution Overview
Problem
Traditional LED reflector combinations suffer from hot spots, thermal degradation, and uneven illumination due to specific distance and angle requirements, which can be mitigated by separating phosphors from LEDs, but this separation is not effectively addressed in existing technologies.
Innovation Solution
A zoned illumination system with a common body having multiple reflective cavities, each with a domed luminescent converting appliance (DLCA) containing photoluminescence materials like phosphors and quantum dots, where the LEDs are placed at one end and the phosphors at the other, with angled light mixing members and a common interior annular wall to blend and mix specific wavelength light emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If phosphors are placed at the chip level to be in the path of emitted light, then light absorption effectiveness is improved, but thermal degradation increases due to exposure to more heat
Solution Approach 1:
The patent extracts the phosphor material from the chip level and relocates it to a remote position within a reflective chamber. This separation removes the phosphor from the high-heat environment of the LED chip while maintaining its light conversion function, thereby reducing thermal degradation while preserving light absorption effectiveness through optimized optical path design.
Solution Approach 2:
The patent introduces a reflective chamber as an intermediary structure between the LED chip and the remote phosphor. This reflective chamber acts as a mediator to redirect and concentrate light onto the phosphor, ensuring effective light absorption even at a distance, while the physical separation provided by this intermediary structure reduces thermal exposure to the phosphor.
2Reliability
If phosphors are separated from the LED chip to reduce thermal degradation, then thermal reliability is improved, but uneven illumination and hot spots occur due to specific distance and angle requirements
Solution Approach 1:
The patent segments the illumination system into distinct functional zones: the LED chip generates light, the reflective chamber directs and distributes light, and the remote phosphor converts wavelengths. This segmentation allows each component to be optimized independently, with the reflective chamber specifically designed to ensure uniform light distribution to the phosphor, thereby achieving even illumination while maintaining thermal separation.
Solution Approach 2:
The patent transitions from a one-dimensional chip-level phosphor arrangement to a three-dimensional remote phosphor configuration within a reflective chamber. This dimensional change allows for optimized light paths and angles, enabling uniform illumination distribution across the phosphor surface while maintaining the thermal benefits of separation from the LED chip.
3Speed
If traditional LED reflector combinations are used with specific distances and angles, then light directionality is improved, but hot spots and uneven illumination occur
Solution Approach 1:
The patent employs a reflective chamber with curved or spherical reflective surfaces instead of traditional planar reflectors. This curvature allows for more uniform light distribution by reflecting light from multiple angles onto the phosphor, eliminating hot spots while maintaining effective light directionality and control.
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 system provides efficient blending and mixing of light emissions, reducing thermal degradation and hot spots, while maintaining even illumination by using photoluminescence materials to alter and combine specific wavelength LEDs, resulting in improved LED lighting performance.
Implementation Method 1
A first LED string generates a combined emission of a first color point utilizing a first domed luminescent converting appliance (DLCA) containing a first photoluminescence material
Implementation Method 2
A zoned illumination system with a common body having multiple reflective cavities, each with a domed luminescent converting appliance (DLCA)
Data Source
AI summary
A zoned optical cup which mixes multiple channels of light to form a blended output, the device having discreet zones or channels including a plurality of reflective cavities each having a domed light converting appliance (DLCA) covering a cluster of LEDs providing a channel of light which is reflected upward by the cavities and mixed by angles walls and structures above the open top of the cavities in the common body of the cup.