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JPS642078A - Exposure illuminator for copying machine - Google Patents

Exposure illuminator for copying machine

Info

Publication number
JPS642078A
JPS642078A JP62159271A JP15927187A JPS642078A JP S642078 A JPS642078 A JP S642078A JP 62159271 A JP62159271 A JP 62159271A JP 15927187 A JP15927187 A JP 15927187A JP S642078 A JPS642078 A JP S642078A
Authority
JP
Japan
Prior art keywords
light quantity
fluorescent lamp
previous lighting
temperature
copying
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.)
Granted
Application number
JP62159271A
Other languages
Japanese (ja)
Other versions
JPH012078A (en
JP2586493B2 (en
Inventor
Hirohisa Miyamoto
Yasuyuki Matsuuchi
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.)
Minolta Co Ltd
Original Assignee
Minolta Co 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP62159271A priority Critical patent/JP2586493B2/en
Priority to US07/210,758 priority patent/US4853739A/en
Publication of JPS642078A publication Critical patent/JPS642078A/en
Publication of JPH012078A publication Critical patent/JPH012078A/en
Application granted granted Critical
Publication of JP2586493B2 publication Critical patent/JP2586493B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Projection-Type Copiers In General (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To obtain a distinct image from the leading edge of copying, to prolong the life of a fluorescent lamp and to judge a fault before occurring by executing a previous lighting with a voltage according to the temperature of the tube wall of the fluorescent lamp, completing it when light quantity reaches a specified value and displaying the shortage of the light quantity when a previous lighting time exceeds a specified time. CONSTITUTION:When a power source is applied, the temperature of the tube wall of the fluorescent lamp 3 is detected by a temperature detector 35 and the previous lighting by a voltage according to the temperature is executed through an output variable type lighting device 27. When the light quantity detected by a light quantity detector 34 reaches the specified value, the previous lighting is completed and a copying-enable signal is outputted. Meanwhile, when the previous lighting time exceeds the specified time, the shortage of the light quantity is displayed. Thus, copying is executed with sufficient light quantity so as to obtain a clear image. Since the previous lighting is not executed for a specified time with voltage of the maximum level, the life of the fluorescent lamp can be prolonged. In case of the abnormality, etc., of the fluorescent lamp 3 the fault can be directly judged.
JP62159271A 1987-06-25 1987-06-25 Document illumination device Expired - Lifetime JP2586493B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP62159271A JP2586493B2 (en) 1987-06-25 1987-06-25 Document illumination device
US07/210,758 US4853739A (en) 1987-06-25 1988-06-23 Illuminating device for image exposure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62159271A JP2586493B2 (en) 1987-06-25 1987-06-25 Document illumination device

Publications (3)

Publication Number Publication Date
JPS642078A true JPS642078A (en) 1989-01-06
JPH012078A JPH012078A (en) 1989-01-06
JP2586493B2 JP2586493B2 (en) 1997-02-26

Family

ID=15690128

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62159271A Expired - Lifetime JP2586493B2 (en) 1987-06-25 1987-06-25 Document illumination device

Country Status (1)

Country Link
JP (1) JP2586493B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02221976A (en) * 1989-02-22 1990-09-04 Mita Ind Co Ltd Image forming device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5911560U (en) * 1982-07-14 1984-01-24 松下電送株式会社 Original illumination device
JPS59171972A (en) * 1983-03-19 1984-09-28 Fuji Xerox Co Ltd Display device of preheating abnormality in copying machine
JPS61208961A (en) * 1985-03-13 1986-09-17 Canon Inc Picture forming device
JPS626276A (en) * 1985-07-02 1987-01-13 Konishiroku Photo Ind Co Ltd Exposing device
JPS6236966A (en) * 1985-08-09 1987-02-17 Casio Comput Co Ltd Light source device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5911560U (en) * 1982-07-14 1984-01-24 松下電送株式会社 Original illumination device
JPS59171972A (en) * 1983-03-19 1984-09-28 Fuji Xerox Co Ltd Display device of preheating abnormality in copying machine
JPS61208961A (en) * 1985-03-13 1986-09-17 Canon Inc Picture forming device
JPS626276A (en) * 1985-07-02 1987-01-13 Konishiroku Photo Ind Co Ltd Exposing device
JPS6236966A (en) * 1985-08-09 1987-02-17 Casio Comput Co Ltd Light source device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02221976A (en) * 1989-02-22 1990-09-04 Mita Ind Co Ltd Image forming device
US5206688A (en) * 1989-02-22 1993-04-27 Mita Industrial Co., Ltd. Light control device for an image forming apparatus

Also Published As

Publication number Publication date
JP2586493B2 (en) 1997-02-26

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