Constant current driving power supply without polarity distinguishing and LED (Light Emitting Diode) fluorescent lamp

A constant current drive, non-polar technology, applied in the field of lighting, can solve problems such as damage to fluorescent lamps, failure to start, etc., to reduce labor costs, facilitate transportation, and have no noise.

Active Publication Date: 2012-10-03
CHONGQING BEIBEI DISTRICT TIANLI LAMP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] When the power supply of traditional fluorescent lamps is connected, the wiring can only be carried out according to the prescribed method. Since there are lamp caps at both ends of the fluorescent lamps, and there are two conductive columns on

Method used

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  • Constant current driving power supply without polarity distinguishing and LED (Light Emitting Diode) fluorescent lamp
  • Constant current driving power supply without polarity distinguishing and LED (Light Emitting Diode) fluorescent lamp
  • Constant current driving power supply without polarity distinguishing and LED (Light Emitting Diode) fluorescent lamp

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Embodiment Construction

[0045] refer to figure 2 , the non-polarity-differentiated constant-current drive power supply of the present invention is composed of a voltage processor 10 , an input current polarity determination unit 20 , a double-bridge switch 30 and a constant-current controller 40 . Each part is described in detail below:

[0046] refer to figure 2 and image 3 , the driving power supply further includes a voltage processor 10 , the voltage processor is connected to the input terminal of the input current polarity determination unit 20 . The voltage processor 10 includes a piezoresistor Z1 and a transformer T2 connected to the piezoresistor. The voltage processor 10 also includes a fuse F1, and one end of the fuse F1 is connected to the piezoresistor Z1. Since the resistance value of the varistor Z1 changes with the voltage within a certain current and voltage range, the transformer T2 can convert high voltage or large current into a standard low voltage in proportion. Therefore,...

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PUM

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Abstract

The invention discloses a constant current driving power supply without polarity distinguishing, which comprises an input current polarity determination unit, a double-bridge switch and a constant current controller, wherein the input current polarity determination unit is used for determining the polarity of input power; the double-bridge switch is connected with the input current polarity determination unit to rectify current provided by the input current polarity determination unit and then perform polarity switching on obtained direct current to keep the polarity of output current in a constant state; and the constant current controller is connected with the double-bridge switch for sampling a current value and a voltage value of the output current of the double-bridge switch from time to time to control the output current to be output in a constant state. The constant current driving power supply without polarity distinguishing is connected to a power supply without distinguishing the polarity of the power supply and is also suitable for a user who has no circuit knowledge.

Description

technical field [0001] The invention relates to the technical field of lighting, in particular to a non-polarity-differentiated constant-current drive power supply and an LED fluorescent lamp. Background technique [0002] The overall circuit of the traditional fluorescent lamp is as follows: figure 1 shown. Its working principle is: when the switch is turned on, the power supply voltage is immediately added to the two poles of the starter through the ballast and the lamp filament. The voltage of 220 volts immediately ionizes the inert gas of the starter, producing a glow discharge. The heat of the glow discharge causes the bimetal to expand and the two poles come into contact. The current passes through the ballast, the contact of the starter and the filament at both ends to form a path. The filament is quickly heated by the current, emitting a large number of electrons. At this time, since the two poles of the starter are closed, the voltage between the two poles is z...

Claims

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Application Information

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IPC IPC(8): H05B37/02
Inventor 李天华
Owner CHONGQING BEIBEI DISTRICT TIANLI LAMP
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