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Lighting device of high-temsion discharge amp and lighting device

A technology for high-pressure discharge lamps and lighting devices, which is applied to lighting devices, the use of gas discharge lamps, energy-saving lighting, etc., and can solve the problems of high cost and complicated reverse-phase control circuits, etc.

Inactive Publication Date: 2003-12-17
TOSHIBA LIGHTING & TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, although it is conceivable to carry out a certain control of the electric power of the lamp, in this way, the whole body becomes larger and the cost becomes higher.
[0007] Also, in Japanese Patent Application Laid-Open No. 2000-58284, when the output voltage of the booster circuit is switched during activation, the inverting control circuit becomes complicated for switching.

Method used

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  • Lighting device of high-temsion discharge amp and lighting device
  • Lighting device of high-temsion discharge amp and lighting device
  • Lighting device of high-temsion discharge amp and lighting device

Examples

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Embodiment Construction

[0070] Hereinafter, examples of the present invention will be described. figure 1 is a configuration diagram of a high-pressure discharge lamp lighting device 11 according to a first embodiment of the present invention, figure 2 It is an explanatory drawing of an example of the high-pressure discharge lamp 12 used in the Example of this invention.

[0071] figure 2 The high-pressure discharge lamp 12 shown is a ceramic discharge lamp using an alumina tube 13 as a luminous tube, and the alumina tube 13 is made of translucent alumina. The alumina tube 13 of the ceramic discharge lamp is made of quartz glass used in the luminous tube of the general high-pressure discharge lamp 12, and is chemically and thermally stable to the metal halide of the enclosure. The aluminum oxide tube 13 of the luminous tube is housed in an outer tube 14 that is kept vacuum inside, and a lamp cap 15 is provided at one end of the outer tube 14 . A high-frequency circuit from the high-pressure disc...

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PUM

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Abstract

The present invention provides a discharge lamp lighting device with less fluctuation of lamp power and less irregularity of a start pulse voltage against the fluctuation of a lamp voltage. For a main circuit 20 to which a high-pressure discharge lamp 12 is connected, a non-load resonance frequency f0 of the high-pressure discharge lamp 12 is set between 2-3 times the resonance frequency of the high-pressure discharge lamp 12 when it is lighted. For an inverter control circuit 21, a half-bridge type inverter circuit 19 is oscillation-controlled at a constant frequency f1 lower than the non-load resonance frequency f0 at which acoustic resonance is not generated when the high-pressure discharge lamp 12 is lighted, and at a frequency close to or over the non-load resonance frequency when the high-pressure discharge lamp 12 is started.

Description

technical field [0001] The invention relates to a high-pressure discharge lamp lighting device and an illuminating device for high-frequency lighting of a high-pressure discharge lamp. Background technique [0002] Generally, the discharge lamp lighting device has an LC resonance type inverter circuit. When the discharge lamp is activated, the inverter circuit starts to oscillate at a high frequency, and slowly lowers the frequency close to the LC resonance circuit (resonance circuit). Resonance frequency. Thereby, the secondary voltage of the inverter circuit rises, and when the secondary voltage reaches the activation voltage of the discharge lamp, the discharge lamp starts to discharge and is lit. Once the discharge lamp is lit, the frequency of the inverter circuit is lowered further, and the discharge lamp is continuously lit at a stable lighting frequency (frequency at the time of lighting). [0003] On the one hand, high-pressure discharge lamps have a characteristi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/24H05B41/282H05B41/288H05B41/292H05B41/38
CPCY02B20/208H05B41/2925H05B41/2883Y02B20/204H05B41/388Y02B20/00
Inventor 三田一敏
Owner TOSHIBA LIGHTING & TECH CORP
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