IMAGE PROCESSING METHOD AND IMAGE PROCESSING APPARATUS

• US 20140078234A1
• Filed: 10/07/2013
• Published: 03/20/2014
• Est. Priority Date: 03/14/2006
• Status: Abandoned Application

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: KAWAHARA, Shinya, ISHIMI, Tomomi, HOTTA, Yoshihiko
• Application Number:
  US14/047,410
• Publication Number:
  US 20140078234A1
• Time in Patent Office: Days
• US Class Current: 347/179
• CPC Class Codes: B41J 2/473 using multiple light beams, wavelengths or colours
• CPC Class Codes: B41J 2/4753 using thermosensitive substrates, e.g. paper
• CPC Class Codes: B41M 5/305 with reversible electron-donor electron-acceptor compositions
• CPC Class Codes: B41M 7/009 using thermal means, e.g. infrared radiation, heat

Abstract

To provide an image processing method including at least one of an image recording step and an image erasing step, wherein (1) laser beams are swept in the same direction and laser scanning involves a period where laser application is discontinued, (2) laser beams are swept in alternating directions and the laser scanning involves a period where laser application is discontinued, (3) laser beams are swept in alternating directions and laser scanning involves a period where laser application is discontinued, wherein the period involves no laser beam application from first laser scanning end point to second laser scanning point, or (4) laser beams are applied in alternating directions while avoiding continuous laser irradiation of nearby portions between adjacent laser beam lines, and laser scanning involves a period where laser application is discontinued.

Claims

1-6. -6. (canceled)

7. An image processing method comprising at least one of:

recording an image on a thermoreversible recording medium by heating the thermoreversible recording medium by application of laser beams thereon, the image being formed of a plurality of laser beam lines; and

erasing an image from a thermoreversible recording medium by heating the thermoreversible recording medium by application of laser beams, the image being formed of a plurality of laser beam lines,

wherein during laser scanning where the laser beams are swept over the medium in parallel at a predetermined distance, the laser beams are sequentially applied in alternating directions,

some part of the laser scanning involves a period where laser application is discontinued, and

the period where laser application is discontinued involves no laser beam application from a first laser scanning end point to a second laser scanning point, the first laser scanning end point corresponding to the end point of laser scanning started at a first laser scanning starting point, and

wherein the thermoreversible recording medium offers temperature-dependent reversible changes in transparency or color tone.

8. The image processing method according to claim 7, wherein the thermoreversible recording medium comprises at least a reversible thermo sensitive recording layer formed over a support, and the reversible thermosensitive recording layer contains a resin and a low-molecular-weight organic substance.

9. The image processing method according to claim 7, wherein the thermoreversible recording medium comprises at least a reversible thermosensitive recording layer formed over a support, and the reversible thermo sensitive recording layer contains a leuco dye and a reversible developer.

10. The image processing method according to claim 7, wherein in the light intensity distribution of the laser beam in its cross section cut along a direction substantially orthogonal to the beam travel direction, the intensity of the central region is equal to or less than the intensity of the peripheral region.

11-24. -24. (canceled)

25. An image processing apparatus comprising:

a laser beam application unit; and

a light intensity adjusting unit configured to change the light intensity of a laser beam, the light intensity adjusting unit being placed at the laser emission side of the laser beam application unit,

wherein the image processing apparatus is used in an image processing method which comprises at least one of;

recording an image on a thermoreversible recording medium by heating the thermoreversible recording medium by application of laser beams thereon, the image being formed of a plurality of laser beam lines; and

erasing an image from a thermoreversible recording medium by heating the thermoreversible recording medium by application of laser beams, the image being formed of a plurality of laser beam lines,

wherein during laser scanning where the laser beams are swept over the medium n parallel at a predetermined distance, the laser beams are sequentially applied in alternating directions,

some part of the laser scanning involves a period where laser application is discontinued, and

the period where laser application is discontinued involves no laser beam application from a first laser scanning end point to a second laser scanning point, the first laser scanning end point corresponding to the end point of laser scanning started at a first laser scanning starting point, and

wherein the thermoreversible recording medium offers temperature-dependent reversible changes in transparency or color tone.

26. The image processing apparatus according to claim 25, wherein the light intensity adjusting unit is at least one of a lens, a filter, and a mirror.

27-30. -30. (canceled)