JPS5493870A - Apparatus for stepwise controlling intensity of light - Google Patents

Apparatus for stepwise controlling intensity of light

Info

Publication number
JPS5493870A
JPS5493870A JP16018777A JP16018777A JPS5493870A JP S5493870 A JPS5493870 A JP S5493870A JP 16018777 A JP16018777 A JP 16018777A JP 16018777 A JP16018777 A JP 16018777A JP S5493870 A JPS5493870 A JP S5493870A
Authority
JP
Japan
Prior art keywords
capacitor
lamp
relay
contact
switch
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
Application number
JP16018777A
Other languages
Japanese (ja)
Inventor
Motohiro Kageyama
Hiroyuki Shoji
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP16018777A priority Critical patent/JPS5493870A/en
Publication of JPS5493870A publication Critical patent/JPS5493870A/en
Pending legal-status Critical Current

Links

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

PURPOSE: To provide an apparatus for stepwise controlling brightness of a lamp, in which brightness of the lamp is changed stepwise by controlling a switching element to a certain conduction phase angle at the time when charging of a capacitor is completed, whereby switching from full-lighted mode to brightness-controlled mode can be effected instantly.
CONSTITUTION: Provided that changeover switch 5 is turned to the side of first contacts 6, 6a with wall switch 7 being kept in its ON-position, lamp 3 is fully lighted since it is connected to power source E via ballast B, first contact 6a of changeover switch 5 and wall switch 7. Simultaneously with this full lighting of lamp 3, relay Ry is energized momentarily via the circuit of power source E, the first contact 6a of changeover switch 5, capacitor 19, relay Ry, diode 20 and power source E, whereby relay contact (r) is closed momentarily and residual charge of capacitor 1 is discharged through resistance 9. When the switch 5 is turned to the side of a second contact 8, on the other hand, relay Ry is not energized and transistor Tr is kept in its OFF-condition since charging of capacitor 1 is completed.
COPYRIGHT: (C)1979,JPO&Japio
JP16018777A 1977-12-30 1977-12-30 Apparatus for stepwise controlling intensity of light Pending JPS5493870A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16018777A JPS5493870A (en) 1977-12-30 1977-12-30 Apparatus for stepwise controlling intensity of light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16018777A JPS5493870A (en) 1977-12-30 1977-12-30 Apparatus for stepwise controlling intensity of light

Publications (1)

Publication Number Publication Date
JPS5493870A true JPS5493870A (en) 1979-07-25

Family

ID=15709695

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16018777A Pending JPS5493870A (en) 1977-12-30 1977-12-30 Apparatus for stepwise controlling intensity of light

Country Status (1)

Country Link
JP (1) JPS5493870A (en)

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