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LED (light-emitted diode) lamp and open-circuit protective circuit thereof

A technology for LED lamps and open circuit protection, which is applied to emergency protection circuit devices, lamp circuit arrangements, and automatic disconnection emergency protection devices, etc., can solve the problems of high cost and complex structure of open circuit protection circuits, and achieves low cost and simple structure. Effect

Active Publication Date: 2015-04-29
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an open-circuit protection circuit for LED lamps, aiming to solve the problems of complex structure and high cost in the current open-circuit protection circuit

Method used

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  • LED (light-emitted diode) lamp and open-circuit protective circuit thereof
  • LED (light-emitted diode) lamp and open-circuit protective circuit thereof
  • LED (light-emitted diode) lamp and open-circuit protective circuit thereof

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0017] figure 1 The structure of the LED lamp open-circuit protection circuit provided by the first embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows.

[0018] The open-circuit protection circuit of LED lamps is connected between the power supply and the electric load. The open-circuit protection circuit includes:

[0019] Voltage dividing resistor R1, voltage dividing resistor R2, sampling resistor R3, delay disconnection relay K1, first switching tube 100 an...

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Abstract

The invention is applicable to the field of LED (light emitting diode) lamp protective circuits, and particularly relates to an LED lamp and an open-circuit protective circuit of the LED lamp. In the LED lamp and the open-circuit protective circuit of the LED lamp, the open-circuit protective circuit for the LED lamp comprises separate elements, wherein when the LED load is in open, no current flows through the LED lamp, and the sampling voltage of a sampling resistor is of low level; a switch tube controls a delay off relay to switch off a power supply loop of a follow-up LED constant-current circuit, so that the open circuit is protected; and moreover, the open-circuit protective circuit has a simple structure and is low in cost.

Description

technical field [0001] The invention belongs to the field of LED lamp protection circuits, in particular to an LED lamp and an open circuit protection circuit thereof. Background technique [0002] As a new type of light source, LED has the characteristics of energy saving, environmental protection, and high efficiency. The technology has matured and is used in various fields. LED is widely used as a lighting source. Open-circuit protection needs to be added to the drive circuit to provide effective protection after the LED is open to prevent the fault from expanding. [0003] The current open-circuit protection circuit generally adopts single-chip microcomputer to sample voltage and output control. Although the single-chip microcomputer control has the advantages of high efficiency and flexible use, but the single-chip microcomputer needs to cooperate with various devices such as reference source and sampling circuit to work, so it has the advantages of large space occupati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02H02H3/00H02H3/06
CPCY02B20/40
Inventor 周明杰孙占民
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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