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Emergency power supply switching circuit and LED drive circuit thereof

A technology of emergency power supply and switching circuit, which is applied in the direction of emergency power supply arrangement, lamp circuit layout, electric light source, etc., can solve the problems of not having the automatic switching function of AC and DC power supply, and achieve the effect of improving the range and overall performance

Inactive Publication Date: 2010-06-02
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an emergency power switching circuit and an LED driving circuit using the emergency power switching circuit in view of the above-mentioned defects of the existing LED driving circuit that does not have the automatic switching function of AC and DC power supplies

Method used

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  • Emergency power supply switching circuit and LED drive circuit thereof
  • Emergency power supply switching circuit and LED drive circuit thereof
  • Emergency power supply switching circuit and LED drive circuit thereof

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Embodiment Construction

[0026] 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.

[0027] see figure 1 , is a block diagram of an embodiment of an LED drive circuit with an emergency power switching function in the present invention. Such as figure 1 As shown, the LED drive circuit with emergency power switching function provided by the present invention adopts the emergency power switching circuit. The emergency power switching circuit includes a DC input circuit 100 , an AC input circuit 200 , and a signal switching circuit 300 .

[0028] The input end of the DC input circuit 100 is connected to the DC power supply 100' for receiving the input signal of the DC power supply; ...

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Abstract

The invention relates to an emergency power supply switching circuit which comprises a direct current input circuit, an alternating current input circuit and a signal switching circuit, wherein the input end of the direct current input circuit is connected with a direct current power supply and used for receiving direct current power supply input signals; the input end of the alternating current input circuit is connected with an alternating current power supply and used for receiving alternating current power supply input signals; and the signal switching circuit is connected between the direct current input circuit and the alternating current input circuit to realize the automatic switching of the direct current power supply input signals and the alternating current power supply input signals. The invention also correspondingly provides an LED drive circuit with an emergency power supply switching function. The LED drive circuit uses the alternating current power supply as a preferred power supply, uses the direct current power supply as a spare power supply, and realizes the switching function of the alternating current power supply and the direct current power supply, and enables an ordinary LED lamp to have the capability of emergency lighting.

Description

technical field [0001] The present invention relates to an LED driving circuit, more specifically, to an emergency power switching circuit and an LED driving circuit using the emergency power switching circuit. Background technique [0002] Currently, LEDs are generally powered by an AC power source. Therefore, the corresponding LED driving circuit is also mainly driven for AC power. In some cases, LEDs can also be powered by a DC power supply, and the corresponding LED driving circuit is only suitable for driving by a DC power supply. [0003] However, in some special occasions, such as ships, LED lamps need to be powered by emergency power supplies when the AC power supply fails, so as to meet the requirements of emergency lighting. Since the emergency power supply is usually a DC source, and the general LED drive circuit driven by an AC power supply is not suitable for DC power supply, there is an urgent need for a drive circuit with an emergency power switching functio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02H02J9/06
CPCY02B70/30Y04S20/20
Inventor 周明杰李万丰陈永伦
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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