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Operating resonant load circuit, dimming circuit and dimming method

A load circuit and resonant technology, applied in the field of operating resonant load circuits, can solve problems such as startup and unsuitable ballasts, and achieve the effect of dimming function

Inactive Publication Date: 2014-04-30
OSRAM SYLVANIA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for the first power level, the above ballasts may have problems starting at low temperature, low voltage and low power levels
Moreover, this ballast is not suitable for use with an AC input voltage of 230V

Method used

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  • Operating resonant load circuit, dimming circuit and dimming method
  • Operating resonant load circuit, dimming circuit and dimming method
  • Operating resonant load circuit, dimming circuit and dimming method

Examples

Experimental program
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Effect test

no. 1 example

[0028] figure 2 A schematic circuit diagram showing an operating resonant load circuit according to a first embodiment of the present invention. Operation The resonant load circuit 200 operates in conjunction with a three-way switch (not shown) to regulate the power output of the load to three discrete levels corresponding to the three settings of the three-way switch.

[0029] In the operating resonant load circuit 200, SI1, SI2 and SI3 constitute the input unit 201 of the circuit. The three outputs of the traditional three-way switch can be connected to SI1, SI2 and SI3 respectively, so that SI1, SI2 and SI3 can work together in three different ways through the three settings of the three-way switch.

[0030] The first way is to connect SI3 and SI2 to the two output terminals of the AC power supply respectively through the first setting of the three-way switch, and make SI1 idle.

[0031] The second way is to respectively connect SI1 and S12 to the two output ends of the ...

no. 2 example

[0053] image 3 A schematic circuit diagram showing an operating resonant load circuit according to a second embodiment of the present invention. Operation The resonant load circuit 300 operates in conjunction with a three-way switch (not shown) to regulate the power output of the load to three discrete levels corresponding to the three settings of the three-way switch.

[0054] In the operating resonant load circuit 300, input terminals SI1, SI2 and SI3 constitute an input unit 301 of the circuit. The three outputs of a conventional three-way switch can be connected to SI1, SI2, and SI3, respectively, so that SI1, SI2, and SI3 can cooperate in three different ways. The three methods mentioned above have been figure 2 It is explained in the description of , and will not be repeated here.

[0055] In operating the resonant load circuit 300, the voltage doubler rectifier 302 has the figure 2 The same structure of the voltage doubler rectifier 202 in the operating resonant ...

no. 3 example

[0076] Figure 4 A schematic circuit diagram showing an operating resonant load circuit according to a third embodiment of the present invention. Operation The resonant load circuit 400 operates in conjunction with a three-way switch (not shown) to regulate the power output of the load to three discrete levels corresponding to the three settings of the three-way switch.

[0077] In the operating resonant load circuit 400, input terminals SI1, SI2 and SI3 constitute an input unit 401 of the circuit. The three outputs of a conventional three-way switch can be connected to SI1, SI2, and SI3, respectively, so that SI1, SI2, and SI3 can cooperate in three different ways. The three methods mentioned above have been figure 2 It is explained in the description of , and will not be repeated here.

[0078] The branch connected in series by transistors D1 and D2, the branch connected in series by transistors D3 and D4, the branch connected in series by transistors D5 and D6, and the ...

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Abstract

An operating resonant load circuit, a dimming circuit and a dimming method are disclosed. The operating resonant load circuit includes: an input unit including a plurality of input terminals, for receiving an AC voltage; a rectifier, for transforming the AC voltage received by the input unit into a DC bus voltage; and a controller, for dividing the DC bus voltage based on an conducting status of the input terminals to output a corresponding DC reference voltage. The dimming circuit and dimming method use the operating resonant load circuit to perform dimming.

Description

technical field [0001] The present invention generally relates to a circuit for operating a load, and more particularly, the present invention relates to a circuit for operating a resonant load, a dimming circuit, and a dimming method. Background technique [0002] In the prior art, the ballast circuit of a fluorescent lamp cooperates with a traditional three-way switch to adjust the light output of the lamp to provide three discrete light intensity levels. [0003] US Patent No. 5821699 discloses a three-level dimming ballast for fluorescent lamps. In this US patent, a bridge rectifier is used to obtain a first power level for fluorescent lamps, a voltage doubler rectifier is used to obtain a second power level for fluorescent lamps, a voltage doubler rectifier is used and the operating frequency of the ballast is used to obtain a power level for The third power level for fluorescent lamps. [0004] However, for the first power level, the ballasts described above may have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B41/36H05B41/38
CPCH05B41/42
Inventor 罗志刚
Owner OSRAM SYLVANIA INC
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