LED constant current driving device

A constant current drive and constant current module technology, applied in lighting devices, lamp circuit layout, light source and other directions, can solve the problems of circuit output power change, short driving life, LED stroboscopic and so on, achieve simple circuit structure, low cost, Small size effect

Active Publication Date: 2015-12-30
SICHUAN SUNFOR LIGHT
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For ordinary people, the use of LED lighting products can save electricity, but the problem with existing LED lighting products is that the driving life is short
Although the LED drive circuit of this scheme has a high power factor and utilization rate, most of this LED drive circuit uses multiple constant current sources
And this kind of driving circuit has the following major defects: when the voltage is in the normal fluctuation range, the output power of the circuit will change greatly, resulting in unstable power and flickering of the LED
The LED drive circuit of this technical solution has a higher power factor, but it does not solve the problem of LED flickering when the voltage fluctuates

Method used

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Embodiment Construction

[0026] A detailed description will be given below in conjunction with the accompanying drawings. Such as figure 1 As shown, the LED constant current driving device of the present invention includes a rectification module 10 , a control module 20 , a constant current module and a lighting module 40 . The output ends of the rectification module 10 are connected to the control module 20 and the lighting module 40 respectively, and provide power input for the control module 20 and the lighting module 40 respectively. The constant current module is arranged between the control module 20 and the lighting module 40 , so that the constant current module can adjust the current flowing through the lighting module 40 under the control of the control module 20 .

[0027]The lighting module 40 includes N LED units connected in series in sequence, and the constant current module includes a current limiting circuit 31 , a sampling circuit 32 and a compensation circuit 33 . During the monot...

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Abstract

The invention relates to an LED constant current driving device which comprises a rectifying module, a control module, a constant current module and a lighting module, wherein the output end of the rectifying module is respectively connected with the control module and the lighting module; the constant current module is arranged between the control module and the lighting module; the lighting module comprises N LED units which are connected in series in sequence; the constant current module comprises a current limiting circuit, a sampling circuit and a compensating circuit; in the monotone increasing or monotone decreasing process of the output voltage of the rectifying module, the N LED units which are connected in series in sequence are conducted one by one or quenched one by one; when at least one LED unit is conducted, the control module outputs a control voltage according to the voltage generated by the compensating circuit and the sampling circuit together to control the current limiting circuit to decrease or increase the current conducted onto the LED unit, so as to enable the power of the conducted LED unit to keep stable.

Description

technical field [0001] The invention relates to an LED driving device, in particular to an LED constant current driving device. Background technique [0002] Now the country advocates energy saving and emission reduction, and lighting products using LED light sources in the lighting field are developing rapidly due to their excellent energy saving, low carbon and green environmental protection effects. When the LED is used as the light source of the lighting device, the life of the lighting device not only depends on the LED, but also depends on components such as the driving power supply. In the current application scheme, the bottleneck of the life of the LED lighting device is still the driving power supply. In order to reduce the impact of the life of the driving power supply on the life of LED lamps, the researchers improved the existing DC power drive device on the one hand, and designed a new circuit for directly driving LEDs with AC power on the other hand. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 杨冕龚云平范青青李东明
Owner SICHUAN SUNFOR LIGHT
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