Title:
【発明の名称】調光装置
Document Type and Number:
Japanese Patent JP2977063
Kind Code:
B2
Abstract:
PURPOSE:To precisely realize bit data characteristics peculiar from about the end part of an address to the end part by use of a digital function generating means and prevent the unstable continuity of a phase control element near the zero cross of an AC power source. CONSTITUTION:A synchronous generating means 11 transmits and resets a power source synchronous signal to an address control means 12 every half cycle of an AC power source 1, starts the address of a function generating means 2 made to ROM every half cycle from address 0, and reads the bit information to a D/A converter 3. The D/A converting means 3 converts it into a light control curve. In a phase control means 4, a comparing means 4a compares this with a variable CD voltage and generates a trigger signal to phase-control a light source 5 by a phase control element 13. A voltage fluctuation correcting element is automatically selected by a function selecting means 8 according to the selected function, and supplied to the D/A converter 3. By the bit information characteristics peculiar between address end parts precisely realized by such a digital function generating means, the unstable continuity near the zero cross of the AC power source is prevented, and flicker can be removed.
Inventors:
UEDA YOSHIO
KANEKO MAKOTO
KANEKO MAKOTO
Application Number:
JP31656792A
Publication Date:
November 10, 1999
Filing Date:
October 30, 1992
Export Citation:
Assignee:
ASAHI NASHONARU SHOMEI KK
International Classes:
H05B37/02; H05B39/08; (IPC1-7): H05B39/08; H05B37/02
Domestic Patent References:
| JP498792A | ||||
| JP6068591A | ||||
| JP5242975A | ||||
| JP5636886A | ||||
| JP62126095U | ||||
| JP3131099U |