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Digital dimming control method and system for two-wire fluorescent lamps

A technology of digital dimming and control method is applied in the field of dimming control of lamps, which can solve the problems of large electromagnetic interference, changes in lamp brightness, and limited control accuracy.

Inactive Publication Date: 2011-02-16
傲玺微电子(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PCT patent with the application number ZL200680015814.6 provides a control method, but this dimming control method will cause continuous large electromagnetic interference due to the use of a thyristor chopper circuit when the ballast is working normally. , and because in the condition of voltage fluctuation, the phase angle will fluctuate and cause the brightness of the lamp to change, the control method adopts analog quantity control, so the addressing method cannot be used for control, and the control accuracy is also limited

Method used

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  • Digital dimming control method and system for two-wire fluorescent lamps
  • Digital dimming control method and system for two-wire fluorescent lamps
  • Digital dimming control method and system for two-wire fluorescent lamps

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Embodiment 1

[0046] One of the embodiments of the dimming controller of the present invention has the design requirement that the dimming controller has functions of switching and dimming up and down. The data protocol of this design is relatively simple, with fewer instructions for transmitting data and less data volume. Therefore, this design can be realized through the following control methods: using zero-crossing switches, taking three "half-waves" as a basic data unit; the transmitted data command does not include the lamp address, that is, all lamps after a controller receive After this command, perform exactly the same action; the data command does not contain brightness assignment information, and can only be adjusted up or down to realize the dimming function; that is, after all the lights are turned on, all lights are in a bright state and can be gradually adjusted. bottom; or all lights are in a low light state, which can be gradually increased.

[0047] The data protocol to r...

Embodiment 2

[0055] A dimming control method with brightness assignment data is the second embodiment of the present invention. Its design requirements are: the controller not only has the functions of switching and dimming up and down, but also has the function of assigning values ​​to the ballast through data instructions. , the function to control the brightness of the lamp. Since the data instructions to be transmitted in this embodiment include assignment information, there are relatively large amounts of data. However, it is suitable for combining with peripheral control systems, and the amount of data is relatively large. Therefore, this design can be realized through the following control methods: use zero-crossing switch, take three "half-waves" as a basic data unit, and the transmitted data instructions do not include the address of the lamp, that is, the lamp after a controller, in the Exactly the same action is performed when a data command is received. In addition, the data ...

Embodiment 3

[0074] A dimming control method with brightness assignment data and address code is the third embodiment of the present invention. Its design requirements: In addition to the switch and dimming function of the controller, the data command also adds the information of assigning the brightness of the ballast, and assigning the address of the lamp. There are relatively many data instructions, which are suitable for combining with peripheral control systems, and can control a single lamp, so that precise control actions can be obtained. Therefore, this design can be realized through the following control methods: use a thyristor chopper switch, take a half-wave as a basic unit (data bit), and transmit data including lamp addresses, that is, different lamps behind one controller, After receiving the instruction, the address judgment must be carried out first, and the corresponding operation will be carried out only if the address is correct.

[0075] The protocol of the data that ...

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Abstract

The invention relates to a dimming control method for lamps, in particular to a digital dimming control method and a digital dimming control system for two-wire fluorescent lamps. In the method, the lamps are controlled by power lines. The digital dimming control method for the two-wire fluorescent lamps comprises a system consisting of a dimming controller 1 and a dimming ballast 2, and a digital protocol. The digital protocol perform addressing on the controlled next-stage lamps through a control instruction and / or a data set to combine a group of control signals and / or address codes through different waveforms, and the control signals and / or the address codes are transmitted to the ballast directly through a power line of the ballast, so that the turn-on, turn-off and / or luminance of each next-stage lamp are controlled. By the method of the invention, after a group of waveforms are transmitted, a power supply signal restores to the original integral sinusoidal waveform, so additional electromagnetic interference is not generated; and digital quantity is used rather than analog quantity in the process of transmission, so the fluctuation of voltage does not influence the dimming performance.

Description

technical field [0001] The invention relates to a dimming control method for a lamp, in particular to a digital dimming control method and system for fluorescent lamps using a two-wire type. Background technique [0002] Fluorescent lamps are widely used in industrial and commercial occasions, and are currently an important energy-saving light source under the background of energy conservation. At present, the dimming technology of fluorescent lamps is divided into two categories. One is the four-wire dimming, such as the dimming of the DALI system. This method can perform addressing and precise control, but requires the user to reconfigure the control line. The other is to use two-wire dimming, such as thyristor dimming. The PCT patent with the application number ZL200680015814.6 provides a control method, but this dimming control method will cause continuous large electromagnetic interference due to the use of a thyristor chopper circuit when the ballast is working normal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/14H05B41/38
Inventor 曹磊
Owner 傲玺微电子(上海)有限公司
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