JPS57627A - Power source device for camera - Google Patents
Power source device for cameraInfo
- Publication number
- JPS57627A JPS57627A JP7532480A JP7532480A JPS57627A JP S57627 A JPS57627 A JP S57627A JP 7532480 A JP7532480 A JP 7532480A JP 7532480 A JP7532480 A JP 7532480A JP S57627 A JPS57627 A JP S57627A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- output
- circuit
- power source
- reference voltage
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/26—Power supplies; Circuitry or arrangement to switch on the power source; Circuitry to check the power source voltage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Camera Bodies And Camera Details Or Accessories (AREA)
Abstract
PURPOSE:To reduce the chances for power consumption of a primary battery of a high cost as far as possible by consuming the secondary battery accumulating the output of solar batteries in preference to the primary battery. CONSTITUTION:The electric power generated in solar batteries 12 by photodetection is accmulated in a secondary battery 14 through a reverse flow blocking diode 13. When a release switch 16 is closed, a voltage decision circuit 17 compares the output of the battery 14 with a preset reference voltage value, and when it decides that the output of the battery 14 is above the reference voltage value, it closes a switching circuit 18 and opens a switching circuit 19. When it decides that the output of the battery 14 has not arrived at the reference voltage, it opens the circuit 18 and closes the circuit 19. Since in this way the battery 14 acts as a power source in preference to the battery 20, the results are lessened consumption of the battery 20 of a high cost and maximum utilization of the output of the battery 12. When the voltage of the battery 14 has dropped at the time of photographing in a dark place, the battery 20 is operated as a power source and therefore, missing of a shutter chance does not occur.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7532480A JPS57627A (en) | 1980-06-03 | 1980-06-03 | Power source device for camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7532480A JPS57627A (en) | 1980-06-03 | 1980-06-03 | Power source device for camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57627A true JPS57627A (en) | 1982-01-05 |
Family
ID=13572964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7532480A Pending JPS57627A (en) | 1980-06-03 | 1980-06-03 | Power source device for camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57627A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5133922A (en) * | 1986-10-24 | 1992-07-28 | Kraftanlagen Ag | Process for the production of panels, webs, and profiles from plastic materials |
| JP2003295275A (en) * | 2002-03-29 | 2003-10-15 | Nikon Corp | Power source circuit for camera system |
| JP2010132199A (en) * | 2008-12-05 | 2010-06-17 | Koito Mfg Co Ltd | Lighting system of vehicular lighting fixture |
-
1980
- 1980-06-03 JP JP7532480A patent/JPS57627A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5133922A (en) * | 1986-10-24 | 1992-07-28 | Kraftanlagen Ag | Process for the production of panels, webs, and profiles from plastic materials |
| JP2003295275A (en) * | 2002-03-29 | 2003-10-15 | Nikon Corp | Power source circuit for camera system |
| JP2010132199A (en) * | 2008-12-05 | 2010-06-17 | Koito Mfg Co Ltd | Lighting system of vehicular lighting fixture |
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