Drawing system and method of creating conversion profile

Patent metadata

Field	Value
Publication number	US-11902489-B2
Application number	US-201917264698-A
Country	US
Kind code	B2
Filing date	Aug 20, 2019
Priority date	Sep 14, 2018
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

A drawing system according to an embodiment of the present disclosure includes a storage, a generator, and a drawing section. The storage stores a conversion table that describes a correspondence relationship between gradation values in a leuco color space and output setting values of light sources. The generator generates, on the basis of leuco image data described in the leuco color space and the conversion table, the output setting values corresponding to the leuco image data. The drawing section performs drawing on a recording medium on the basis of the output setting values generated by the generator, the recording medium including a plurality of recording layers, the plurality of recording layers each including a leuco dye and a photothermal conversion agent.

First claim

The invention claimed is:

1. A drawing system comprising:
a storage that stores a conversion table that describes a correspondence relationship between gradation values in a leuco color space and output setting values of light sources;
a generator that generates, on a basis of leuco image data described in the leuco color space and the conversion table, the output setting values corresponding to the leuco image data; and
a drawing section that performs drawing on a recording medium on a basis of the output setting values generated by the generator, the recording medium including a plurality of recording layers, the plurality of recording layers each including a leuco dye and a photothermal conversion agent, wherein
the storage further stores a conversion profile that describes a relationship between a device-dependent color space and a device-independent color space, and that describes a relationship between the device-independent color space and the leuco color space, and
the drawing system further includes a converter that converts image data described in the device-dependent color space into the leuco image data described in the leuco color space.

2. The drawing system according to claim 1 , wherein
the storage further stores an exclusion condition list that describes the output setting values that are in a range in which an erasing defect or a medium deterioration defect may occur in drawing on the recording medium performed by the drawing section,
the drawing system further includes a creation section that creates an output setting file by replacing the output setting values that match the exclusion condition list, out of a plurality of sets of the output setting values generated by the generator, with the output setting values that are in the range in which the erasing defect or the medium deterioration defect may occur, and
the drawing section performs drawing on the recording medium on a basis of the output setting file created by the creation section.

3. The drawing system according to claim 1 , wherein the drawing section includes a light source section that outputs a laser light beam having power corresponding to the output setting values.

4. The drawing system according to claim 1 , wherein the conversion profile is provided for each type of recording medium on which drawing is to be performed.

5. The drawing system according to claim 1 , wherein
the device-dependent color space is an RGB color space, and
the device-independent color space is an L*a*b* color space or an XYZ color space.

6. A method of creating a conversion profile, the method comprising:
storing a conversion table that describes a correspondence relationship between gradation values in a leuco color space and output setting values of light sources;
storing a conversion profile that describes a relationship between a device-dependent color space and a device-independent color space, and that describes a relationship between the device-independent color space and the leuco color space;
generating, on a basis of leuco image data described in the leuco color space and the conversion table, the output setting values corresponding to the leuco image data;
converting image data described in the device-dependent color space into the leuco image data described in the leuco color space; and
drawing on a recording medium on a basis of the output setting values generated by the generator, the recording medium including a plurality of recording layers, the plurality of recording layers each including a leuco dye and a photothermal conversion agent.

7. The method of creating the conversion profile according to claim 6 , further comprising:
generating a color list on a basis of the conversion table that describes the correspondence relationship between gradation values in the leuco color space and the output setting values of the light sources, the color list describing a correspondence relationship between combinations of the gradation values of respective colors in the leuco color space and the output setting values corresponding to the combinations; and
generating a conversion profile that describes a correspondence relationship between values in a device-independent color space and the gradation values in the leuco color space included in the color list, the values in the device-independent color space being obtained by performing color measurement on the recording medium on which drawing has been performed on a basis of the color list.

8. The method of creating the conversion profile according to claim 7 , further comprising generating the conversion table, wherein
the forming the conversion table includes creating the conversion table by excluding, from the output setting values, the output setting values that are in a range in which a defect occurs, the defect being that the recording medium develops a color which is different from a color to be developed.

Assignees

• Sony Corp

Inventors

• Tejima Asuka

Classifications

• H04N1/60 Primary

  Colour correction or control {(H04N1/54 takes precedence)} · CPC title

• B41J2/442

  using lasers · CPC title

• B41J2/4753

  using thermosensitive substrates, e.g. paper · CPC title

• B41M5/284

  Organic thermochromic compounds · CPC title

• B41M5/305

  with reversible electron-donor electron-acceptor compositions · CPC title