LED stepless light-adjusting driving circuit and LED lamp
A driving circuit and stepless dimming technology, applied in the field of electric lighting, can solve the problem that the LED driving circuit cannot be steplessly dimmed
Active Publication Date: 2012-05-16
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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Problems solved by technology
[0004] In order to solve the problem that the traditional LED drive circuit cannot perform stepless dimming, it is necessary to provide a LED stepless dimming drive circuit
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[0019] In order to make the objectives, features, and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0020] figure 1 It is a circuit block diagram of an LED stepless dimming driving circuit in an embodiment, which includes a first filter module 100, a constant voltage module 200, a pulse width adjustment module 300, and a constant current module 400.
[0021] The first filtering module 100 receives the DC power signal input from the power input terminal, performs filtering processing, and outputs it to the constant voltage module 200 and the constant current module 400.
[0022] The input terminal of the constant voltage module 200 is connected to the output terminal of the first filter module 100, receives the filtered DC signal for voltage stabilization processing, and the output terminal of the constant voltage module 200 outputs a...
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The invention relates to an LED stepless light-adjusting driving circuit comprising a first filter module, a constant voltage module, a pulse width adjusting module and a constant current module; the first filter module is used for receiving a direct current power supply signal input by an input end of a power supply and outputting the direct current power supply signal to the constant voltage module and the constant current module after carrying out filter treatment on the direct current power supply signal; the constant voltage module is used for receiving the direct current signal subjected to the filter treatment, carrying out voltage-stabilizing treatment and outputting a constant voltage signal; the pulse width adjusting module is used for receiving the constant voltage signal and adjusting the pulse width of a pulse signal output by an output end; and the constant current module is used for receiving the direct current signal subjected to the filter treatment by the first filter module and the pulse signal output by the output end of the pulse width adjusting module and adjusting the current output to an LED light source according to the pulse width of the pulse signal. The invention also provides an LED lamp. In the invention, the brightness of the LED light source can be continuously adjusted through the pulse width adjusting module, stepless adjustment can be realized, and the circuit is stable and reliable.
Description
【Technical Field】 [0001] The invention relates to the field of electric lighting, in particular to an LED stepless dimming drive circuit, and also relates to an LED lamp. 【Background technique】 [0002] As a new type of light source, LED (Light Emitting Diode) has the characteristics of energy saving, environmental protection and high efficiency. The technology has been mature and applied in various fields. LEDs are widely used as lighting sources, and various LED drive circuits have appeared. Traditionally, in low-voltage places, DC-DC chopping technology is used to drive LEDs, but it has disadvantages such as high cost, complicated circuits, easy damage, strong (high frequency) electromagnetic interference, and can’t be steplessly adjusted. Light. [0003] Stepless dimming refers to the continuous adjustment of the luminous power of lamps, and the stepless dimming of LEDs has a wide range of application prospects. [Content of the invention] [0004] In order to solve the proble...
Claims
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Login to View More IPC IPC(8): H05B37/02F21S2/00F21Y101/02
Inventor 周明杰孙占民
Owner OCEANS KING LIGHTING SCI&TECH CO LTD