LED Package AC Drive Rectifying Circuit Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Light-emitting diodes (LEDs) require additional circuits to operate with alternating current power, leading to complex configurations and reduced light-emitting areas due to the need for rectifying circuits, which complicates the packaging and reduces the desired light emission level.
Innovation Solution
A light-emitting device package with a simplified rectifying circuit structure that allows direct driving with alternating current power, featuring a package substrate with conductive patterns and rectifying circuits connected to light-emitting devices, enabling full-wave rectification and independent driving of LEDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional rectifying circuits are included to drive LEDs with alternating current power, then the LED package can be driven by commercially available AC power, but the configuration and wiring structure becomes complicated
Solution Approach 1:
The patent integrates the rectifying circuit functions directly into the LED package structure by forming rectifying diodes using the LED chip's own PN junctions and additional doped regions. This merging of the rectifying function with the light-emitting function eliminates the need for separate external rectifying circuits and simplifies the overall wiring structure while maintaining AC power compatibility
Solution Approach 2:
The LED chip is designed to serve multiple functions: it acts as both the light-emitting device and the rectifying circuit. By creating additional doped regions (first and second doped regions) that form PN junctions with the LED chip's P-type and N-type regions, the same chip structure performs both light emission and AC-to-DC rectification, reducing the need for additional components
2Adaptability or versatility
If additional rectifying circuits are included to drive LEDs with alternating current power, then the LED package can be driven by commercially available AC power, but the light-emitting area is reduced
Solution Approach 1:
The patent combines the rectifying circuit functionality with the LED chip structure itself, eliminating the need for separate external rectifying components that would occupy additional space. The rectifying diodes are formed within the same chip substrate, maximizing the light-emitting area while enabling AC power operation
Solution Approach 2:
The rectifying circuit is nested within the LED chip structure by forming doped regions inside the chip substrate. The first and second doped regions are created within the same physical space as the LED chip, allowing the rectifying function to be embedded without increasing the overall package size or reducing the light-emitting area
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 simplifies the wiring structure, increases the light-emitting area, and allows for efficient operation with various alternating current power levels, enhancing the light output and reducing manufacturing defects.
Implementation Method 1
a first rectifying circuit disposed on the first and second conductive patterns; a first light-emitting device disposed on the fifth conductive pattern and electrically connected to the first rectifying circuit; a second rectifying circuit disposed on the third and fourth conductive patterns
Data Source
AI summary
A light-emitting device package including: a package substrate; first to fifth conductive patterns disposed on a top surface of the package substrate; a first rectifying circuit disposed on the first and second conductive patterns; a first light-emitting device disposed on the fifth conductive pattern and electrically connected to the first rectifying circuit; a second rectifying circuit disposed on the third and fourth conductive patterns; and a second light-emitting device disposed on the fifth conductive pattern and electrically connected to the second rectifying circuit.