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A single-channel current-limiting drive two-color LED circuit and LED lamps

A technology of LED circuits and LED lamps, which can be applied to the layout of electric lamp circuits, electric light sources, lighting devices, etc., and can solve the problems of no current limiting function and damage to LED lamps, etc.

Inactive Publication Date: 2015-10-21
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a single-channel current-limiting drive two-color LED circuit, which aims to solve the problem that the current single-channel drive two-color LED circuit has no current limiting function, and the LED lamp will be damaged when the external power supply of the circuit fluctuates.

Method used

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  • A single-channel current-limiting drive two-color LED circuit and LED lamps
  • A single-channel current-limiting drive two-color LED circuit and LED lamps

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Embodiment Construction

[0014] 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.

[0015] figure 1 The circuit structure of the single-channel current-limiting driving dual-color LED 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:

[0016] A dual-color LED circuit 100 driven by a single-channel current limiter is respectively connected to a first LED light group LED1 and a second LED lamp group LED2 of different colors. The single-channel current-limited drive dual-color LED circuit 100 includes:

[0017] Vol...

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Abstract

The invention is applied to the field of lighting circuits and particularly relates to a single-circuit current-limiting driving double-color LED circuit and an LED lamp. Current-limiting functions are respectively achieved between an NPN-type audion Q4, an NPN-type audion Q5 and a current-limiting resistor R7 and between a PNP-type audion Q3, an PNP-type audion Q6 and a current-limiting resistor R9. In an over-current state, the NPN-type audion Q4 disconnects in an over-current mode, so that a second LED lamp set is extinguished. Similarly, the PNP-type audion Q3 disconnects in an over-current mode, so that a first LED lamp set is extinguished. Consequently, the LED lamp is prevented from being heated and being damaged due to over-current work.

Description

technical field [0001] The invention belongs to the field of lighting circuits, and in particular relates to a single-channel current-limiting driving two-color LED circuit and an LED lamp. Background technique [0002] At present, the driving circuit of night scene LED lamps in lighting engineering is basically driven by the one-to-one correspondence between LED lamps and their driving circuits. In order to save cost and reduce the complexity of the circuit, a single circuit driving two-color LED circuit is specially introduced. Since the driving circuit is simplified from the original two circuits to one circuit, its reliability is improved, the cost is reduced, and the volume is reduced. It is especially suitable for small electronic products. [0003] However, the existing single-channel drive dual-color LED circuit has an unlimited current function. When the external power supply of the circuit fluctuates, the operating current of the LED lamp will increase, resulting i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 周明杰管伟芳
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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