Title:
CURRENT CONTROL METHOD AND DRIVING CIRCUIT FOR MULTI-LAMPS
Document Type and Number:
WIPO Patent Application WO/2008/040251
Kind Code:
A1
Abstract:
This invention discloses a multi-lamps electric current control method which includes:
When any of the said multi-lamps is open or the resonance circuit parameter is
changed, the output voltage of the transformer is adjusted to ensure the output voltage
of the transformer conforms to the range determined by the relation between the
output voltage and the frequency of the said transformer required to stabilize the
current of a single lamp, and the relation between the said lamp and the voltage and
the frequency of the capacitance series circuit, so as to stabilize the current value
of each of the lamps. The multi-lamps driving circuit disclosed in this invention
has the operating mode controlling unit which includes the storage module to
store the data of the relationship curve of the voltage and the frequency of the
said lamp and the capacitance series circuit, and the controlling module used
to control the voltage output from the transformer falling into the range determined
by the relation between the voltage and the frequency of the said transformer to
keep the current of a single lamp stable, and the relationship curve between the
said voltage and the frequency. This invention can precisely control the current
of a lamp to ensure a stable illumination and normal operating condition of the
current even under interference.
Inventors:
YANG DONGPING (CN)
Application Number:
PCT/CN2007/070788
Publication Date:
April 10, 2008
Filing Date:
September 26, 2007
Export Citation:
Assignee:
PROVIEW TECHNOLOGY SHENZHEN CO (CN)
YANG DONGPING (CN)
YANG DONGPING (CN)
International Classes:
H05B41/282
Domestic Patent References:
| WO2006051630A1 | 2006-05-18 |
Foreign References:
| US20050099144A1 | 2005-05-12 | |||
| CN1805644A | 2006-07-19 | |||
| KR100337111B1 | 2002-11-22 | |||
| US20040105287A1 | 2004-06-03 | |||
| CN1669206A | 2005-09-14 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (Scitech PlaceNo.22, Jian Guo Men Wai Ave., Chao Yang District, Beijing 4, CN)
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