Title:
【発明の名称】白熱灯点灯装置
Document Type and Number:
Japanese Patent JP2843117
Kind Code:
B2
Abstract:
PURPOSE:To safely exchange a lamp by installing a control means to control the output to an incandescent lamp from a lighting apparatus until electric power source is thrown again in the case of re-setting time of an incandescent lamp. CONSTITUTION:A resistor R4 is connected in parallel with a primary side of a current transformer T2 to stop the oscillation of an inverter in the case of no load condition at the time of filament rupture, etc., and prevent re-lighting at the time of lamp re-setting, so that danger e.g. burning is prevented. Due to the resistor, current in the primary coil of the current transformer T2 at the time of no load decreases as compared with that at the time of the normal conditions and is divided to the resistor R4 and owing to this, bias current of transistors Q1, Q2 running in the secondary coil of the current transformer T2 also decreases and lessens to the level at which the on-off of the transistors Q1, Q2 does not return. As a result, under no load condition, oscillation does not occur.
Inventors:
HAMAHATA SEIJI
HIRATOMO YOSHIMITSU
YAMAZAKI SHIGEAKI
TAMURA YUKIO
HIRATOMO YOSHIMITSU
YAMAZAKI SHIGEAKI
TAMURA YUKIO
Application Number:
JP15803390A
Publication Date:
January 06, 1999
Filing Date:
June 15, 1990
Export Citation:
Assignee:
MATSUSHITA DENKO KK
International Classes:
H05B39/00; H05B39/04; H05B39/10; (IPC1-7): H05B39/00; H05B39/04; H05B39/10
Domestic Patent References:
| JP2256195A | ||||
| JP266890A | ||||
| JP6199298A | ||||
| JP266889A | ||||
| JP1157099A | ||||
| JP5769692A | ||||
| JP177299U | ||||
| JP5783699U | ||||
| JP277898U |
Attorney, Agent or Firm:
Keisei Nishikawa (1 person outside)