Title:
SWITCHING APPARATUS
Document Type and Number:
Japanese Patent JPH0353497
Kind Code:
A
Abstract:
PURPOSE: To improve color temperature controllability by providing an optical sensing means for registering the spectral power of a light emitted from a lamp in a first wavelength region between 350nm and 800nm of a control signal generating means. CONSTITUTION: A means 4 for generating a control signal and an optical sensing means 41 for registering the spectral power of a light emitted from a lamp 1 is a first wavelength region between 350nm and 800nm are provided. Thus, for registering the spectral power of a light emitted from the lamp 1, a linear relationship between a color temperature and power supplied to the lamp 1 is correctly approximated and thereby a signal expressed in a relatively wide area is made. The signal thereby made is particularly suited to by used as a control signal for a color temperature and is independent of an amalgam compound over a wide range.
Inventors:
FURANSHISUKASU ADORUFU MARII S
ROBERUTASU ANTONIUSU YOHANESU
MACHIIRU ANTONIUSU MARUCHINUSU
ROBERUTASU ANTONIUSU YOHANESU
MACHIIRU ANTONIUSU MARUCHINUSU
Application Number:
JP17039690A
Publication Date:
March 07, 1991
Filing Date:
June 29, 1990
Export Citation:
Assignee:
PHILIPS NV
International Classes:
H05B41/36; H05B41/392; H05B41/231; (IPC1-7): H05B41/231; H05B41/36
Attorney, Agent or Firm:
Akihide Sugimura (5 outside)
Next Patent: ENCLOSED TYPE ELECTRICITY REMOVER