JPS5673353A - Test system for lamp - Google Patents
Test system for lampInfo
- Publication number
- JPS5673353A JPS5673353A JP15030079A JP15030079A JPS5673353A JP S5673353 A JPS5673353 A JP S5673353A JP 15030079 A JP15030079 A JP 15030079A JP 15030079 A JP15030079 A JP 15030079A JP S5673353 A JPS5673353 A JP S5673353A
- Authority
- JP
- Japan
- Prior art keywords
- lamps
- lamp
- node
- voltage
- accordance
- 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
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
PURPOSE: To simply and surely detect the defect of a display device and to seek automation of the lamp test by a method wherein an alarm is generated in accordance with a value of voltage detected when all lamps are turned off.
CONSTITUTION: Series circuits of lamps L1WLN and resistors R1WRN are installed between a Dc source V0 and the earth. The turning ON and OFF of lamps is performed by switching the potential at a node between each lamp and each resistor to a high or low level. And then, a cathode side of each of diodes D1WDN is connected to each node and an anode side of each diode is jointly connected and this joint node is connected to an input side of a voltage detector 30. And an alarm system 40 is actuated in accordance with a voltage value detected through the detector 30 when lamps are entirely turned off by means of a control circuit 20, thus, informing an abnormality of the lamp display system.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15030079A JPS5673353A (en) | 1979-11-20 | 1979-11-20 | Test system for lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15030079A JPS5673353A (en) | 1979-11-20 | 1979-11-20 | Test system for lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5673353A true JPS5673353A (en) | 1981-06-18 |
Family
ID=15493983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15030079A Pending JPS5673353A (en) | 1979-11-20 | 1979-11-20 | Test system for lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5673353A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006116166A (en) * | 2004-10-25 | 2006-05-11 | Toshimitsu Sasaki | Baby's chair |
JP2007236490A (en) * | 2006-03-06 | 2007-09-20 | Combi Corp | Protection frame attachment structure and seat with the same |
-
1979
- 1979-11-20 JP JP15030079A patent/JPS5673353A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006116166A (en) * | 2004-10-25 | 2006-05-11 | Toshimitsu Sasaki | Baby's chair |
JP2007236490A (en) * | 2006-03-06 | 2007-09-20 | Combi Corp | Protection frame attachment structure and seat with the same |
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