LED Filament Lamp AC Power Integration via Series Rectification
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Solution Overview
Problem
Traditional LED filament lamps are complex in structure and require a circuit board and driving circuit, making them difficult to connect to an AC power supply and increasing production costs.
Innovation Solution
An LED filament lamp design featuring a transparent hood with a lamp cap, a support base made of insulating material, and a strip-shaped substrate with LED wafers connected in series, where rectifying units allow direct connection to an AC power supply, eliminating the need for a circuit board and driving circuit, and using a current limiting resistor for power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a circuit board and driving circuit are used in traditional LED filament lamps, then the lamp can be connected to AC power supply, but the structure becomes complex and production cost increases
Solution Approach 1:
The patent extracts and removes the circuit board and driving circuit from the LED filament lamp structure. Instead of using traditional complex driving circuits, the invention directly connects LED beads to the AC power supply through simple wire connections, eliminating unnecessary components while maintaining AC power compatibility.
Solution Approach 2:
The patent segments the LED filament into multiple independent LED beads connected in series. Each LED bead is independently mounted on the filament wire without requiring a circuit board, allowing direct AC power connection through the series-connected bead structure.
2Adaptability or versatility
If a circuit board and driving circuit are used in traditional LED filament lamps, then the lamp can be connected to AC power supply, but production cost increases
Solution Approach 1:
The patent extracts and removes the circuit board and driving circuit from the LED filament lamp structure. Instead of using traditional complex driving circuits, the invention directly connects LED beads to the AC power supply through simple wire connections, eliminating unnecessary components while maintaining AC power compatibility.
Solution Approach 2:
The patent replaces expensive circuit boards and driving circuits with simple, inexpensive wire connections and basic components. The design uses affordable LED beads mounted directly on the filament, significantly reducing material costs while maintaining functionality.
3Illumination intensity
If LED wafers are connected using metal wires on a strip-shaped substrate, then the LED filament can emit light, but the device can only use direct current requiring AC to DC conversion
Solution Approach 1:
The patent changes the electrical connection parameters by connecting LED beads in series along the filament wire rather than on a substrate. This series connection configuration allows the lamp to directly accept AC power supply voltage, eliminating the need for AC to DC conversion while maintaining light emission 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
Simplifies the production process, reduces production costs, and allows for direct AC power connection, enhancing flexibility and service life of the LED filament lamp.
Implementation Method 1
LED is an abbreviation of light emitting diode. The basic structure of an LED is an electroluminescent semiconductor chip.
Implementation Method 2
The basic structure of an LED is an electroluminescent semiconductor chip.
Implementation Method 3
the lower end of the light emitting source is connected with the lamp cap through a current limiting resistor
Data Source
AI summary
The present invention belongs to the technical field of lighting devices, in particular to an LED filament lamp. The LED filament lamp comprises a transparent hood with an opening at the lower end, and a lamp cap connected to the transparent hood, and a light emitting source is arranged in the transparent hood. The LED filament lamp also comprises a support base; the support base is arranged in a space enclosed by the transparent hood and the lamp cap; the light emitting source is fixed on the support base, and the lower end of the light emitting source is connected with the lamp cap through a current limiting resistor. The light emitting source comprises a single strip-shaped substrate, and a plurality of LED wafers; the two ends of the strip-shaped substrate are conductive electrical connecting ends; the plurality of LED wafers are connected in turn and arranged on the strip-shaped substrate at an interval to form a strip-shaped LED wafer set; a rectifying unit electrically connected with the strip-shaped LED wafer set is arranged at each one of the two ends of the strip-shaped LED wafer set; and each one of the rectifying units is fixed on the strip-shaped substrate and is electrically connected with each corresponding one of the electrical connecting ends. The present invention provides an LED filament lamp which is conveniently assembled and can be directly connected with an alternating current.