JPS54136765A - Lamp lighting circuit - Google Patents
Lamp lighting circuitInfo
- Publication number
- JPS54136765A JPS54136765A JP4368278A JP4368278A JPS54136765A JP S54136765 A JPS54136765 A JP S54136765A JP 4368278 A JP4368278 A JP 4368278A JP 4368278 A JP4368278 A JP 4368278A JP S54136765 A JPS54136765 A JP S54136765A
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- lighting
- contact switch
- lamp lighting
- lighting circuit
- 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
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
PURPOSE: To enable a lighting of a lamp so that a lighting initial current will not be larger than a lighting constant current, by connecting condensers with both terminals of a lamp.
CONSTITUTION: Since both terminals of a lamp 2 are short-circuited by a contact switch 4 when the contact switch 4 is closed, no current flows to the lamp 2. When the contact switch 4 is opened, a d.c. power source 1 is supplied to the lamp 2 through a resistance 6 and a condenser 7. But a voltage supplied to the lamp 2 rises gradually due to a charging characteristic of the resistance 6 and condenser 7. And thus, a lighting initial current flowing to the lamp 2 can be equalized with a lighting constant current.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4368278A JPS54136765A (en) | 1978-04-13 | 1978-04-13 | Lamp lighting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4368278A JPS54136765A (en) | 1978-04-13 | 1978-04-13 | Lamp lighting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54136765A true JPS54136765A (en) | 1979-10-24 |
Family
ID=12670601
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4368278A Pending JPS54136765A (en) | 1978-04-13 | 1978-04-13 | Lamp lighting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54136765A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6326909A (en) * | 1986-11-25 | 1988-02-04 | 林原 健 | Overcurrent limiting circuit for dc lamp bulb |
JP2008283850A (en) * | 2007-05-09 | 2008-11-20 | Freescale Semiconductor Inc | Power supply circuit and power supply control method |
-
1978
- 1978-04-13 JP JP4368278A patent/JPS54136765A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6326909A (en) * | 1986-11-25 | 1988-02-04 | 林原 健 | Overcurrent limiting circuit for dc lamp bulb |
JP2008283850A (en) * | 2007-05-09 | 2008-11-20 | Freescale Semiconductor Inc | Power supply circuit and power supply control method |
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