JPS559548A - Device having light source for exposure - Google Patents
Device having light source for exposureInfo
- Publication number
- JPS559548A JPS559548A JP8227778A JP8227778A JPS559548A JP S559548 A JPS559548 A JP S559548A JP 8227778 A JP8227778 A JP 8227778A JP 8227778 A JP8227778 A JP 8227778A JP S559548 A JPS559548 A JP S559548A
- Authority
- JP
- Japan
- Prior art keywords
- lighting
- time
- control
- light quantity
- 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
- Exposure Or Original Feeding In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE:To prevent uneven exposure in lighting, by providing means for controlling the light quantity of a light source for exposure to control the start time of lighting of the source in accordance with the control quantity. CONSTITUTION:Variable resistors VR1 to VR3 for controlling the light quantity, and a delay circuit comprising capacity C1, resistors R8 to R10, and variable resistor VR4 are provided in order to control start time of lighting of the light source in accordance with the control quantity of the light quantity control means. On switching on a power source, a voltage higher than that defined by variable resistors VR1 to VR3 is produced from an output terminal, and then the voltage set with variable resistor VR2 is produced, resulting in improving rising of the lamp, and lighting of the lamp at the predetermined light quantity after a constant time. Temporary application of the higher rating voltage at the start of lighting shortens the rising time, and controlling variable resistor VR4 in accordance with the application time can cut down compensation time.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8227778A JPS559548A (en) | 1978-07-06 | 1978-07-06 | Device having light source for exposure |
GB7922040A GB2024438B (en) | 1978-06-30 | 1979-06-25 | Electrophotographic copier |
US06/053,088 US4320964A (en) | 1978-06-30 | 1979-06-28 | Image formation apparatus |
DE2954647A DE2954647C2 (en) | 1978-06-30 | 1979-06-29 | Electrophotographic copier with lamp control circuit |
DE19792926360 DE2926360A1 (en) | 1978-06-30 | 1979-06-29 | IMAGE GENERATION DEVICE |
GB08137972A GB2108688B (en) | 1978-06-30 | 1981-12-16 | Electrophotographic copier |
GB08137971A GB2108687B (en) | 1978-06-30 | 1981-12-16 | Electrophotographic copier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8227778A JPS559548A (en) | 1978-07-06 | 1978-07-06 | Device having light source for exposure |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS559548A true JPS559548A (en) | 1980-01-23 |
Family
ID=13769994
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8227778A Pending JPS559548A (en) | 1978-06-30 | 1978-07-06 | Device having light source for exposure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS559548A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56149054A (en) * | 1980-04-19 | 1981-11-18 | Ricoh Co Ltd | Device for controlling charging and exposure in copying machine |
JPS60136728A (en) * | 1983-12-26 | 1985-07-20 | Toshiba Corp | Image forming device |
-
1978
- 1978-07-06 JP JP8227778A patent/JPS559548A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56149054A (en) * | 1980-04-19 | 1981-11-18 | Ricoh Co Ltd | Device for controlling charging and exposure in copying machine |
JPS60136728A (en) * | 1983-12-26 | 1985-07-20 | Toshiba Corp | Image forming device |
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