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Dimming circuit and method

A dimming circuit and voltage regulating circuit technology, applied in the direction of light sources, electric light sources, electrical components, etc., can solve the problems of high unit price of integrated circuits, inability to effectively reduce the price of gas discharge lamps, etc.

Inactive Publication Date: 2015-06-10
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high unit price of integrated circuits (ICs), the price of gas discharge lamps cannot be effectively reduced

Method used

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  • Dimming circuit and method

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Embodiment Construction

[0018] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by those skilled in the art to which the present invention belongs. "First", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any sequence, quantity or importance, but are only used to distinguish different components. Likewise, words like "a" or "one" do not denote a limitation in quantity, but indicate that there is at least one. Words such as "comprises" or "comprising" and similar terms mean that the elements or items listed before "comprising" or "comprising" include the elements or items listed after "comprising" or "comprising" and their equivalents, and do not exclude other component or object. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0019] figu...

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Abstract

A dimming circuit comprises a multipath input end, an alternating current-direct current conversion circuit, a voltage adjusting circuit, a direct current-alternating current conversion circuit and a control circuit, wherein the multipath input end is coupled to an alternating-current power supply and used for receiving alternating-current voltage, the alternating current-direct current conversion circuit is used for converting the alternating-current voltage into first direct-current voltage; the voltage adjusting circuit is used for converting the first direct-current voltage into second direct-current voltage, and the voltage adjusting circuit comprises a first switch; the direct current-alternating current conversion circuit is used for converting the second direct-current voltage into the working voltage of a lamp; the control circuit is coupled to the multipath input end and provides a control signal to the first switch. The dimming circuit has the advantages that the coupling modes of the multipath input end and the alternating-current power supply are converted to adjust the control signal so as to change the duty ratio of the first switch and adjust the brightness of the lamp; the dimming circuit is simple in electronic element connection, and the multipath input end is selectively coupled to the input end of the alternating-current power supply to achieve dimming.

Description

technical field [0001] The invention relates to a dimming circuit and a dimming method, which can be used for gas discharge lamps or other lamps of the same type, in particular to a dimming circuit capable of three-way dimming and the application of the dimming circuit Dimming method of dimming circuit. Background technique [0002] In order to meet the needs of different lighting application conditions and the goal of energy saving and emission reduction, various dimming ballasts that can control the brightness change of gas discharge lamps have appeared. [0003] The gas discharge lamp changes the current flowing through the gas discharge lamp by changing the operating frequency of the ballast driving the gas discharge lamp, thereby achieving the purpose of adjusting the brightness of the gas discharge lamp. The core of the dimming ballast can be attributed to the frequency control of the ballast inverter. By controlling the oscillation frequency of the internal inverter ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/38
Inventor 朱成花庄凯
Owner GENERAL ELECTRIC CO
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