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Light dimmer, light dimming system and light dimming method

A dimmer and dimming technology, applied in the field of lighting, can solve the problems of increased cost, complex structure of the dimmer, and reduced accuracy of the dimming signal, etc.

Active Publication Date: 2015-06-10
INVENTRONICS HANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is currently no dimmer capable of outputting a half-wave dimming signal
Second, due to figure 1 The dimmer in the output output the dimming signal in the form of leading-edge chopping voltage, and when the light source driver of the subsequent stage is a capacitive load, it will figure 1 The capacitance value of capacitor C1 in the dimmer in the dimmer affects the chopping angle of the leading-edge chopping voltage, resulting in figure 1 The accuracy of the dimming signal output by the dimmer decreases in
also, figure 1 In the dimmer, since the bidirectional thyristor S1 has the limitation of the minimum holding current, it is necessary to add an impedance matching circuit to eliminate the limitation of the minimum holding current, thus making the structure of the dimmer more complicated and increasing the cost

Method used

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  • Light dimmer, light dimming system and light dimming method
  • Light dimmer, light dimming system and light dimming method
  • Light dimmer, light dimming system and light dimming method

Examples

Experimental program
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Embodiment 1

[0097] see image 3 , the present invention provides a specific embodiment of a dimmer, in this embodiment, the dimmer is connected in series between the AC power supply and the light source driver, and the dimmer includes a first branch and a second branch; The first branch and the second branch are connected in parallel, the first branch includes a first switch S1, and the second branch includes a diode D1.

[0098] Wherein, when the dimmer is in a dimming state, the first switch S1 is turned off, and the dimmer outputs a first half-wave signal.

[0099] exist image 3 In the illustrated embodiment, the diode D1 can also be any kind of unidirectional rectifier, for example, the diode D1 can be a triode in a saturated state, an insulated gate bipolar transistor (IGBT) in a saturated state, or an IGBT in a conductive state. Any one of the one-way thyristors.

[0100] The first switch S1 may also be any device with switch conduction characteristics, for example, the first sw...

Embodiment 2

[0104] Figure 4 A specific embodiment of a dimming system provided by the present invention, the dimming system includes an AC power supply 401, a light source driver 402 and image 3 A dimmer 403 is provided in the illustrated embodiment. The dimmer 403 is connected in series between the AC power source 401 and the light source driver 402 .

[0105] The AC power source 401 outputs an AC signal to the dimmer 403 .

[0106] The dimmer 403 includes a first branch and a second branch; the first branch and the second branch are connected in parallel, the first branch includes a first switch S1, and the second branch includes a diode D1. When the dimmer 403 is in the dimming state, the first switch S1 is turned off, and the dimmer 403 outputs a first half-wave signal. The diode D1 enables the direction of the current flowing through the diode D1 to be unidirectionally conducted from the AC power source 401 to the light source driver 402 .

[0107] The light source driver 402 i...

Embodiment 3

[0112] Figure 7 A specific embodiment of a dimming system provided by the present invention, the dimming system includes an AC power supply 701, a light source driver 702, image 3 In the illustrated embodiment a dimmer 703 and a control unit 704 are provided. The dimmer 703 is connected in series between the AC power source 701 and the light source driver 702 .

[0113] The AC power source 701 outputs an AC signal to the dimmer 703 .

[0114] The dimmer 703 includes a first branch and a second branch; the first branch and the second branch are connected in parallel, the first branch includes a first switch S1, and the second branch includes a diode D1. When the dimmer 703 is in the dimming state, the first switch S1 is turned off, and the dimmer 703 outputs a first half-wave signal. The diode D1 enables the direction of the current flowing through the diode D1 to be unidirectionally conducted from the AC power source 701 to the light source driver 702 .

[0115] The cont...

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PUM

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Abstract

The invention provides a light dimmer. The light dimmer is connected between an alternating-current power supply and a light source driver in series and comprises a first branch and a second branch which are connected in parallel, wherein the first branch comprises a first switch, and the second branch comprises a first one-way rectifier; and when the light dimmer is in a light dimming state, the first switch is disconnected, and the light dimmer outputs a first half-wave signal. Thus, when the first switch is disconnected, the light dimmer is in the light dimming state, the first one-way rectifier conducts an alternating-current signal into the half-wave signal in a one-way manner, so that the light dimmer capable of outputting a light dimming signal in the half-wave form can be realized, and the light source driver performs light dimming according to the light dimming signal. In addition, the devices used by the light dimmer are the switches and the one-way rectifiers, so that even though the rear-stage light driver is a capacitive load, the influence on the accuracy of the light dimming signal emitted to the light dimmer also can not be caused, and an impedance matching circuit does not need to be added. The invention also provides a light dimming system and a light dimming method.

Description

technical field [0001] The invention relates to the lighting field, in particular to a dimmer, a dimmer system and a dimmer method. Background technique [0002] In the lighting field, in many cases, it is necessary to adjust the brightness of the light source according to the dimming signal. The dimmer is a lighting accessory used to output a dimming signal that can change the luminous flux of the light source and adjust the illuminance level. [0003] figure 1 It is a common dimming system. The dimming system includes a dimmer, an AC voltage, and a light source driver. The dimmer includes a bidirectional thyristor S1, and a trigger composed of a bidirectional trigger diode D1, an adjustable resistor R1, and a capacitor C1. circuit. The working principle of the dimmer is: the capacitor C1 is charged through the adjustable resistor R1, when the voltage on the capacitor C1 rises to the conduction threshold voltage of the bidirectional trigger diode D1, the bidirectional tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 葛良安华桂潮姚晓莉
Owner INVENTRONICS HANGZHOU