JPS54122125A - Static latent image formation process - Google Patents
Static latent image formation processInfo
- Publication number
- JPS54122125A JPS54122125A JP2950278A JP2950278A JPS54122125A JP S54122125 A JPS54122125 A JP S54122125A JP 2950278 A JP2950278 A JP 2950278A JP 2950278 A JP2950278 A JP 2950278A JP S54122125 A JPS54122125 A JP S54122125A
- Authority
- JP
- Japan
- Prior art keywords
- latent image
- high voltage
- voltage pulses
- electrode
- diode
- 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
- Dot-Matrix Printers And Others (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Electrophotography Using Other Than Carlson'S Method (AREA)
Abstract
PURPOSE:To form a high quality latent image using a simple constitution, by providing a semiconductor diode in the reverse direction to the polarity of high voltage pulses applied across a needle electrode and a drive circuit for applying high voltage pulses to this electrode. CONSTITUTION:Needle electrode 5 is disposed in contact to latent image forming surface 4 or keeping a gap of few tens micrometers from surface 4, and positive or negative polarity high voltage pulses 7 are applied from drive circuit 6 in the form of characters or signs divided into dots. On reaching start voltage for discharge, discharge occurs, and the charge discharged at that time is kept in dielectric layer 2 of latent image forming unit 3 to form a latent image. Diode 8 is inserted between circuit 6 and electrode 5 in the direction to be reversely biased on applying high voltage pulses. As a result, when high voltage pulses are applied from circuit 6, discharge current is controlled to a correct value due to the reverse direction characteristics of diode 8, premitting occurrence of spots to be eliminated and a high respolution latent image to be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2950278A JPS54122125A (en) | 1978-03-15 | 1978-03-15 | Static latent image formation process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2950278A JPS54122125A (en) | 1978-03-15 | 1978-03-15 | Static latent image formation process |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54122125A true JPS54122125A (en) | 1979-09-21 |
Family
ID=12277849
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2950278A Pending JPS54122125A (en) | 1978-03-15 | 1978-03-15 | Static latent image formation process |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54122125A (en) |
-
1978
- 1978-03-15 JP JP2950278A patent/JPS54122125A/en active Pending
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