Hybrid LED Packaging with Linear Constant Current Circuit
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Solution Overview
Problem
Conventional LED illuminating modules require complex circuitry and high fabrication costs, making it difficult to integrate them into compact forms without reducing functionality.
Innovation Solution
A packaged illuminating device featuring a hybrid light emitting device with multiple illuminating elements of different luminance properties, connected via bonding wires to a linear constant current circuit, which uses a constant DC voltage and duty cycles to control illuminance, encapsulated by a protection layer and soldering plate, allowing for compact packaging using various packaging types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple LEDs of different illuminating colors are used to form desired illuminance and illuminating color in a mixed manner, then the illuminating performance is improved, but the circuit complexity and fabrication cost increase
Solution Approach 1:
The patent combines multiple LEDs of different illuminating colors (including primary color temperature LEDs) into a single hybrid light emitting device package. This merging approach allows the LEDs to work together to form desired illuminance and illuminating colors through color mixing, while sharing common circuitry for driving and control, thereby reducing overall circuit complexity compared to separate driving circuits for each LED type.
Solution Approach 2:
The patent employs a universal driving circuit design that can drive multiple types of LEDs with different color temperatures and luminance characteristics. The circuit uses duty cycle control and constant current regulation that are applicable across different LED configurations, making the circuit multi-functional and reducing the need for specialized circuitry for each LED type, thus lowering fabrication cost and complexity.
2Illumination intensity
If multiple LEDs of different illuminating colors are used to form desired illuminance and illuminating color in a mixed manner, then the illuminating performance is improved, but the fabrication cost increases
Solution Approach 1:
The patent combines multiple LEDs of different illuminating colors (including primary color temperature LEDs) into a single hybrid light emitting device package. This merging approach allows the LEDs to work together to form desired illuminance and illuminating colors through color mixing, while sharing common circuitry for driving and control, thereby reducing overall circuit complexity compared to separate driving circuits for each LED type.
Solution Approach 2:
The patent employs a universal driving circuit design that can drive multiple types of LEDs with different color temperatures and luminance characteristics. The circuit uses duty cycle control and constant current regulation that are applicable across different LED configurations, making the circuit multi-functional and reducing the need for specialized circuitry for each LED type, thus lowering fabrication cost and complexity.
3Power
If a larger circuit volume is used to accommodate the complicated circuitry, then the driving capability is improved, but the packaging difficulty increases
Solution Approach 1:
The patent transitions from planar circuit layout to a three-dimensional packaging structure. The hybrid light emitting device package incorporates vertical stacking of LEDs and circuit components, utilizing the Z-dimension (height) to accommodate multiple LED types and circuit elements. This dimensional transition allows for higher power capability while maintaining a compact footprint, as components are arranged in layers rather than spreading out in a large planar area.
Solution Approach 2:
The patent implements a nested packaging structure where smaller components are integrated within or around larger structural elements. The bonding wires are routed through and around the LED package structure, the constant current circuit is integrated close to the LED array, and the entire assembly is encapsulated within a protective housing. This nesting approach maximizes space utilization and reduces the overall circuit volume while maintaining full driving capability.
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 a smaller circuit volume with maintained functionality, enabling easier integration and reducing fabrication costs while ensuring reliable operation and adaptability to different luminance properties and colors.
Implementation Method 1
controls duty cycles of the plurality of illuminance elements based on the different or partially same luminance properties of the plurality of illuminating elements
Implementation Method 2
The first plurality of bonding wires are respectively connected to the plurality of illuminating elements. The linear constant current circuit is electrically coupled to the hybrid light emitting device via the first plurality of bonding wires
Implementation Method 3
The soldering plate loads the hybrid light emitting device, the first plurality of bonding wires, and the linear constant current circuit by soldering
Implementation Method 4
The protection layer encapsulates the hybrid light emitting device, the first plurality of bonding wires, the linear constant current circuit, and the second plurality of bonding wires with the aid of the soldering plate
Implementation Method 5
The protection layer is made of a light transmittable material
Implementation Method 6
the light transmittable material has a high thermal conductivity
Data Source
AI summary
A packaged illuminating device includes a hybrid light emitting device, a first plurality of bonding wires, a linear constant current circuit, a soldering plate, a second plurality of bonding wires and a protection layer. The hybrid light emitting device includes a plurality of illuminating elements having different or partially same luminance properties. The plurality of illuminating elements are disposed in respective proximities. The linear constant current circuit is electrically coupled to the hybrid light emitting device via the first plurality of bonding wires at a first plurality of pins of the linear constant current circuit. The linear constant current circuit powers up the plurality of illuminating elements using a constant DC voltage and controls duty cycles. The protection layer encapsulates the hybrid light emitting device, the first plurality of bonding wires, the linear constant current circuit, and the second plurality of bonding wires with the aid of the soldering plate.