JPS6485781A - Digital flash printer - Google Patents

Digital flash printer

Info

Publication number
JPS6485781A
JPS6485781A JP24093587A JP24093587A JPS6485781A JP S6485781 A JPS6485781 A JP S6485781A JP 24093587 A JP24093587 A JP 24093587A JP 24093587 A JP24093587 A JP 24093587A JP S6485781 A JPS6485781 A JP S6485781A
Authority
JP
Japan
Prior art keywords
optical shutter
liquid crystal
shutter elements
crystal optical
elements
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
Application number
JP24093587A
Other languages
Japanese (ja)
Inventor
Makoto Kikukawa
Takashi Mori
Hidekazu Sasaki
Katsuaki Miyawaki
Toshio Kawakubo
Yuusuke Takeda
Masaichi Muranaka
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP24093587A priority Critical patent/JPS6485781A/en
Publication of JPS6485781A publication Critical patent/JPS6485781A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
    • G06K15/1238—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point
    • G06K15/1242—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point on one main scanning line
    • G06K15/1252—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point on one main scanning line using an array of light modulators, e.g. a linear array

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)

Abstract

PURPOSE:To print a gradation image with a high resolving power, by a method wherein, a plurality of liquid crystal optical shutter plates arranged in matrix form are laid over each other, optical shutter elements are respectively opened/closed according to a digital density gradation signal for each pixel, and a light is transmitted per element by the amount according to the density gradation signal. CONSTITUTION:In a liquid crystal optical shutter 1, two sheets of liquid crystal optical shutters 1a, 1b having the same matrix arrangement are laid over each other without the deviation between optical shutter elements 30a, 30b. The plurality of optical shutter elements of one of the liquid crystal optical shutters have the same light transmittance in a shutter close state, and those of the other liquid crystal optical shutter plate have different light transmittances in the optical shutter close state. In an open state, all the optical shutter elements have a light transmittance of 1. Therefore, by separately opening/closing the optical shutter elements 30a, 30b vertically overlapped, four types of combination are available, and four types of light transmittance can be obtained. Image data is inputted to a data conversion part through an interface and converted to gradation data per pixel, and the open and close of the two optical shutter elements is controlled by an LCS driver.
JP24093587A 1987-09-28 1987-09-28 Digital flash printer Pending JPS6485781A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24093587A JPS6485781A (en) 1987-09-28 1987-09-28 Digital flash printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24093587A JPS6485781A (en) 1987-09-28 1987-09-28 Digital flash printer

Publications (1)

Publication Number Publication Date
JPS6485781A true JPS6485781A (en) 1989-03-30

Family

ID=17066834

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24093587A Pending JPS6485781A (en) 1987-09-28 1987-09-28 Digital flash printer

Country Status (1)

Country Link
JP (1) JPS6485781A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6612709B2 (en) 1993-03-03 2003-09-02 Fujitsu Display Technologies Corporation Lighting device and display device using the lighting device
US7242444B2 (en) 2003-03-28 2007-07-10 Seiko Epson Corporation Space light modulating apparatus, projector including same, process for manufacturing microstructure element used in same, and microstructure element manufactured by same process

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6612709B2 (en) 1993-03-03 2003-09-02 Fujitsu Display Technologies Corporation Lighting device and display device using the lighting device
US6986600B2 (en) 1993-03-03 2006-01-17 Sharp Kabushiki Kaisha Lighting device and display device using the lighting device
US7242444B2 (en) 2003-03-28 2007-07-10 Seiko Epson Corporation Space light modulating apparatus, projector including same, process for manufacturing microstructure element used in same, and microstructure element manufactured by same process
US7401926B2 (en) 2003-03-28 2008-07-22 Seiko Epson Corporation Space light modulating apparatus, projector including same, process for manufacturing microstructure element used in same, and microstructure element manufactured by the same process

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