JPS55138755A - Phase control system - Google Patents
Phase control systemInfo
- Publication number
- JPS55138755A JPS55138755A JP4746079A JP4746079A JPS55138755A JP S55138755 A JPS55138755 A JP S55138755A JP 4746079 A JP4746079 A JP 4746079A JP 4746079 A JP4746079 A JP 4746079A JP S55138755 A JPS55138755 A JP S55138755A
- Authority
- JP
- Japan
- Prior art keywords
- stepwise
- phase
- controlled
- controlling
- constitution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE:To make possible stepwise phase controlling without increasing circuit constituting elements by generating the trigger signal corresponding to set time through interrupt processing of a microcomputer thereby performing phase controlling. CONSTITUTION:Clock pulses are formed by a photo coupler PC according to the AC input through a rectifying circuit REC. The microcomputer MPU operating synchronously with this clock pulses makes interrupt operation of the phase control signal corresponding to the timer set value through selection of switches A-C and controls the conduction of a transistor T. As a result of this, the conduction period of a triode AC switch TRC is controlled by a transformer T, by which the phase of AC input is controlled and the AC voltage applied to a lamp 34, etc. is controlled stepwise according to setting, whereby the controlling, etc. of the exposure is accomplished. With this constitution, the phase controlling may be performed stepwise without increasing the circuit constituting elements according to the discrete stepwise change.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4746079A JPS55138755A (en) | 1979-04-18 | 1979-04-18 | Phase control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4746079A JPS55138755A (en) | 1979-04-18 | 1979-04-18 | Phase control system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55138755A true JPS55138755A (en) | 1980-10-29 |
Family
ID=12775764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4746079A Pending JPS55138755A (en) | 1979-04-18 | 1979-04-18 | Phase control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55138755A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57196267A (en) * | 1981-05-28 | 1982-12-02 | Konishiroku Photo Ind Co Ltd | Power supply circuit |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4838718A (en) * | 1971-09-16 | 1973-06-07 | ||
JPS51113736A (en) * | 1975-03-31 | 1976-10-07 | Iwatsu Electric Co Ltd | Automatic light exposure phase controller |
JPS5246739U (en) * | 1975-09-29 | 1977-04-02 | ||
JPS52147756A (en) * | 1976-06-04 | 1977-12-08 | Ricoh Co Ltd | Zero volt trigger method in ac load |
-
1979
- 1979-04-18 JP JP4746079A patent/JPS55138755A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4838718A (en) * | 1971-09-16 | 1973-06-07 | ||
JPS51113736A (en) * | 1975-03-31 | 1976-10-07 | Iwatsu Electric Co Ltd | Automatic light exposure phase controller |
JPS5246739U (en) * | 1975-09-29 | 1977-04-02 | ||
JPS52147756A (en) * | 1976-06-04 | 1977-12-08 | Ricoh Co Ltd | Zero volt trigger method in ac load |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57196267A (en) * | 1981-05-28 | 1982-12-02 | Konishiroku Photo Ind Co Ltd | Power supply circuit |
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