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Method and device for controlling fixed value of light emitting diode (LED) driver and LED driver

A technology of an LED driver and a control method, which is applied to lighting devices, lamp circuit layout, light sources, etc., can solve the problem of high cost of LED drivers, and achieve cost-saving and cost-saving effects

Inactive Publication Date: 2016-01-06
INVENTRONICS HANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides a method and device for controlling a fixed value of an LED driver, so as to overcome the problem in the prior art that a plurality of LED drivers with different upper and lower limits may be required for the same occasion, resulting in high cost of the LED driver

Method used

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  • Method and device for controlling fixed value of light emitting diode (LED) driver and LED driver
  • Method and device for controlling fixed value of light emitting diode (LED) driver and LED driver
  • Method and device for controlling fixed value of light emitting diode (LED) driver and LED driver

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Embodiment 1

[0047] Please refer to the attached figure 1 , which is a flow chart of the first control method for controlling the fixed value of the LED driver disclosed in the embodiment of the present invention, the method may include:

[0048] Step S101: Detect whether an existing terminal of the LED driver inputs a control signal.

[0049]There are three kinds of LED drivers in the prior art. The first LED driver includes: input line Va, input line Vb, positive output line Vo+ and negative output line Vo-. A control signal is input between Va and the input line Vb, and a control signal may also be input between the positive output line Vo+ and the negative output line Vo-. The second type of LED driver includes: input line Va, input line Vb, positive output line Vo+, negative output line Vo-, dimming line Dim, and ground line GND. The control signal can be input between the input line Vb, the control signal can also be input between the positive output line Vo+ and the negative outpu...

Embodiment 2

[0059] see figure 2 , which is a flow chart of the second control method for controlling the fixed value of the LED driver provided by the embodiment of the present invention, the method includes:

[0060] Step S201: Detect whether an existing terminal of the LED driver inputs a control signal.

[0061] When a control signal is input between the dimming line Dim and the ground line GND, the control signal is a signal different from the dimming signal. For example, when the LED driver is working normally, the input signal of the dimming line Dim and the ground line GND is allowed to be a voltage signal of 0-10V, that is, the dimming signal is a voltage signal of 0-10V, as long as the control signal is not at the level of 0-10V The signal is enough, for example, the control signal can be a pulse signal, or a level signal with any amplitude above 10V (excluding 10V).

[0062] When the control signal is input between the auxiliary power supply line Vcc and the ground line GND, ...

Embodiment 3

[0074] There are many ways to obtain the fixed value corresponding to the characteristic parameter in the above embodiment. see image 3 , is a flow chart of the first method for obtaining a fixed value corresponding to a characteristic parameter provided by an embodiment of the present invention, and the method includes:

[0075] Step S301: Control the current value of the fixed value of the LED driver to vary within the first current range according to the characteristic parameters.

[0076] When the LED driver is an LED driver without dimming function, the first current range is the rated current range, and step S301 may be: controlling the output current value of the LED driver to vary within the rated current range according to characteristic parameters.

[0077] The characteristic parameters include one or more of frequency, amplitude and duty cycle. When the LED driver detects the control signal, it will control the rated current of the LED driver to change within the...

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Abstract

The embodiment of the invention provides a method and device for controlling a fixed value of a light emitting diode (LED) driver and the LED driver. The method comprises the following steps of detecting whether a control signal is input to a dimming ray Dim and a grounding line GND of the LED driver or not; inputting a dimming signal between the dimming ray Dim and the grounding line GND when the LED driver normally works, wherein the control signal is a signal different from the dimming signal; and determining the fixed value of the LED driver according to the control signal when the control signal is detected, wherein the fixed value comprises an upper limit or a lower limit of an output current value of the LED driver. With the adoption of the method, the device and the LED driver, provided by the embodiment of the invention, the cost of the LED driver can be saved.

Description

[0001] This application proposes a divisional application to the Chinese patent application with the application number 201210499514.7, the application date is November 28, 2012, and the invention title is "Method, device and LED driver for controlling the fixed value of LED driver". technical field [0002] The present invention relates to the field of LED drivers, and more specifically relates to a method and device for controlling a fixed value of the LED driver and the LED driver. Background technique [0003] There are three types of LED drivers in the prior art. The first type of LED driver includes: input line Va, input line Vb, positive output line Vo+ and negative output line Vo-; the second type of LED driver includes: input line Va, input line Vb, Positive output line Vo+, negative output line Vo-, dimming line Dim, and ground line GND; the third LED driver includes: input line Va, input line Vb, positive output line Vo+, negative output line Vo-, dimming line Dim,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02H05B44/00
CPCH05B45/10
Inventor 华桂潮葛良安熊代富
Owner INVENTRONICS HANGZHOU