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Digital dimming device and digital dimming method

A dimming device and dimming technology, applied in the field of lighting, can solve problems such as complex wiring of the system, and achieve the effects of simple wiring of the device, convenient operation, and convenient control

Inactive Publication Date: 2013-05-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, other dimming methods use multi-wire control. In addition to the two power lines, a special dimming control signal is required, which will make the system wiring complicated.

Method used

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  • Digital dimming device and digital dimming method
  • Digital dimming device and digital dimming method
  • Digital dimming device and digital dimming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1, figure 1 The circuit diagram of a new digital dimming device is given. In this embodiment, the input terminals are IN1 and IN2, and the input power (power supply) can be DC or AC. The dimming pulse generating component is a switch element 100, which can be a rotary switch, a normal switch with lock, or a switch without lock.

[0035] One end of the switching element 100 is connected to an input terminal IN1, and the other end of the switching element 100 is respectively connected to the light source driving circuit 106 through the light source driving circuit input line 101, and to one of the input terminal 109 of the limiter circuit 104 and the auxiliary power supply circuit 112. The input terminal 110 is connected.

[0036] Take the rotary switch as an example. Normally, the rotary switch is in the on position. When an external force (such as a human hand) turns the switch, the rotary switch is in the off position; when there is no external force (or loosened),...

Embodiment 2

[0055] Embodiment 2. Using the digital dimming device shown in embodiment 1, the agreed protocol is changed to the following content:

[0056] In this embodiment, the negative pulse time (t brightness ), adjust the negative pulse time of the dimming direction (t direction ), the pulse time generated by the jitter and the setting of the light source brightness level are the same as in the first embodiment. After the system is powered on, the initial dimming direction is down. The toggle switch outputs a series of negative pulses for adjusting the brightness to the decoding circuit 105. After the decoding circuit 105 de-jitters the pulse signal, it temporarily does not adjust the brightness of the light source, but records the number of effective dimming pulses. Until t after receiving the previous pulse wait Until the next pulse is received within the time, the decoding circuit 105 calculates the current brightness level to be adjusted according to the number of recorded pulse...

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PUM

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Abstract

The invention discloses a digital dimming device which comprises a switch element (100); the switch element (100) is coupled with an amplitude limiting circuit (104); the output end of the amplitude limiting circuit (104) is coupled with a decoding circuit (105); the decoding circuit (105) is coupled with a light source driving circuit (106); and the light source driving circuit (106) is connected with a light source. The invention also provides a digital dimming method which is carried out with the dimming device and comprises that the switch element (100) is serially connected with a power supply, to produce dimming pulse; a pulse signal produced by the switch element (100) is converted into a pulse dimming signal with the amplitude applicable to the decoding circuit (105) through the amplitude limiting circuit (104); and the decoding circuit (105) jitters the pulse dimming signal and analyzes and decodes the signal according to an agreed agreement, and controls the light source driving circuit (106) to dim the light source. The method can realize dimming under the premise of not changing the traditional wiring.

Description

Technical field [0001] The invention relates to dimming technology in the field of lighting, and in particular to a device and method for dimming using a digital method. Background technique [0002] At present, the dimmers widely used at home and abroad mainly adopt the thyristor chopper technology. The main advantages of thyristor dimming equipment are: simple operation, flexibility, convenient use, long life, and convenient wiring (only 2 power cords are required, and the dimmer can be directly replaced by the switch). However, when the thyristor dimming device is turned on, every half of the power frequency cycle of the power supply cuts the phase of the input, the waveform is distorted, and contains rich high-order harmonics, which seriously pollutes the power grid and also passes radiation It interferes with other equipment with electric conduction, and at the same time makes the bulb produce "silk" sound, which is low in efficiency and poor in load adaptability. [0003] I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 张军明杜韦静
Owner ZHEJIANG UNIV