WO2022209205A1 - 描画システムおよび描画方法 - Google Patents

描画システムおよび描画方法 Download PDF

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Publication number
WO2022209205A1
WO2022209205A1 PCT/JP2022/002331 JP2022002331W WO2022209205A1 WO 2022209205 A1 WO2022209205 A1 WO 2022209205A1 JP 2022002331 W JP2022002331 W JP 2022002331W WO 2022209205 A1 WO2022209205 A1 WO 2022209205A1
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WIPO (PCT)
Prior art keywords
laser beams
recording medium
scanning
light source
laser
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.)
Ceased
Application number
PCT/JP2022/002331
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English (en)
French (fr)
Japanese (ja)
Inventor
功 高橋
聡子 浅岡
光成 星
将弘 高田
太一 竹内
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Sony Group Corp
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Sony Group Corp
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Filing date
Publication date
Application filed by Sony Group Corp filed Critical Sony Group Corp
Publication of WO2022209205A1 publication Critical patent/WO2022209205A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
    • B41J2/47—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using the combination of scanning and modulation of light
    • B41J2/471—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using the combination of scanning and modulation of light using dot sequential main scanning by means of a light deflector, e.g. a rotating polygonal mirror
    • B41J2/473—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using the combination of scanning and modulation of light using dot sequential main scanning by means of a light deflector, e.g. a rotating polygonal mirror using multiple light beams, wavelengths or colours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
    • B41J2/44—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements
    • B41J2/442—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements using lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
    • B41J2/475—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material for heating selectively by radiation or ultrasonic waves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/28—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating
    • B41M5/282—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating using thermochromic compounds
    • B41M5/284—Organic thermochromic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/323—Organic colour formers, e.g. leuco dyes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/333—Colour developing components therefor, e.g. acidic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/34—Multicolour thermography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
    • B41J2/475—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material for heating selectively by radiation or ultrasonic waves
    • B41J2/4753—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material for heating selectively by radiation or ultrasonic waves using thermosensitive substrates, e.g. paper
    • B41J2002/4756—Erasing by radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/04—Direct thermal recording [DTR]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/38—Intermediate layers; Layers between substrate and imaging layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/42—Multiple imaging layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/305—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers with reversible electron-donor electron-acceptor compositions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/323—Organic colour formers, e.g. leuco dyes
    • B41M5/327—Organic colour formers, e.g. leuco dyes with a lactone or lactam ring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/46—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography characterised by the light-to-heat converting means; characterised by the heat or radiation filtering or absorbing means or layers

Definitions

  • the present disclosure relates to a drawing system and a drawing method.
  • thermosensitive recording medium As a display medium to replace printed matter, a recording medium that reversibly records and erases information with heat, a so-called reversible thermosensitive recording medium, has been developed.
  • a reversible thermosensitive recording medium for example, a plurality of reversible thermosensitive recording layers having different light-to-heat conversion wavelengths are laminated via a heat insulating layer.
  • a reversible thermosensitive recording medium is irradiated with a laser beam of a predetermined wavelength to selectively generate heat in a specific reversible thermosensitive recording layer, and the action of the generated heat causes color development or discoloration. information is recorded or erased (see, for example, Patent Document 1).
  • thermo crosstalk occurs between two reversible thermosensitive recording layers adjacent in the stacking direction, resulting in unexpected writing and erasing. Erasure may occur. Therefore, it is desirable to provide a drawing system and drawing method in which unexpected writing and erasing are unlikely to occur.
  • a drawing system performs drawing on a recording medium in which a plurality of recording layers each containing a different color former and a different photothermal conversion agent are laminated via a heat insulating layer. It is a drawing system that performs This drawing system includes a light source section and a scanning section.
  • the light source unit generates a plurality of laser beams having wavelengths different from each other and including wavelengths corresponding to absorption wavelengths of the photothermal conversion agent.
  • the scanning unit irradiates the surface of the recording medium with a plurality of laser beams generated by the light source unit through a predetermined gap, and synchronizes the plurality of laser beams in the same direction on the surface of the recording medium. Scan.
  • a plurality of laser beams generated by the light source unit are irradiated onto the surface of the recording medium through a predetermined gap, and the plurality of laser beams are emitted onto the surface of the recording medium. are synchronously scanned in the same direction as each other. This can reduce the occurrence of thermal crosstalk between adjacent recording layers in the stacking direction. As a result, it is possible to reduce the possibility of unexpected writing or erasing.
  • a drawing method performs drawing on a recording medium in which a plurality of recording layers each containing a different color former and a different photothermal conversion agent are laminated via a heat insulating layer. is the way to do it.
  • This drawing method includes the following two. (1) generating a plurality of laser beams having wavelengths different from each other and including a wavelength corresponding to the absorption wavelength of the photothermal conversion agent; while irradiating the surface of the recording medium with a plurality of laser beams synchronously scanning in the same direction on the surface of the recording medium
  • a plurality of laser beams are irradiated onto the surface of a recording medium through a predetermined gap, and the plurality of laser beams are radiated in the same direction on the surface of the recording medium. Scanned synchronously. This can reduce the occurrence of thermal crosstalk between adjacent recording layers in the stacking direction. As a result, it is possible to reduce the possibility of unexpected writing or erasing.
  • FIG. 1 is a diagram illustrating a schematic configuration example of a drawing system according to an embodiment of the present disclosure
  • FIG. FIG. 2 is a diagram showing a schematic configuration example of a drawing unit in FIG. 1
  • 3 is a diagram showing a cross-sectional configuration example of the recording medium of FIG. 2
  • FIG. 2 is a diagram showing how drawing is performed in the drawing system of FIG. 1
  • FIG. It is a figure showing an example of the drawing method based on a comparative example. It is a figure showing an example of the drawing method based on a comparative example.
  • FIG. 2 is a diagram showing a modified example of the schematic configuration of the drawing system of FIG. 1
  • FIG. 2 is a diagram showing a modified example of the schematic configuration of the drawing system of FIG. 1;
  • FIG. 2 is a diagram showing a modified example of the schematic configuration of the drawing system of FIG. 1;
  • FIG. 2 is a diagram showing a modified example of the schematic configuration of the drawing system of FIG. 1;
  • FIG. 2 is a diagram showing a modified example of the schematic configuration of the drawing system of FIG. 1;
  • FIG. 2 is a diagram showing a modified example of the schematic configuration of the drawing system of FIG. 1;
  • FIG. 12 is a diagram showing a modification of the drawing method in the drawing system of FIGS. 1 and 7 to 11;
  • FIG. 12 is a diagram showing a modification of the drawing method in the drawing system of FIGS. 1 and 7 to 11;
  • FIG. 1 shows a schematic configuration example of a drawing system 100 according to this embodiment.
  • the drawing system 100 writes (renders) and erases information on a recording medium 10, which will be described later.
  • the rendering system 100 converts externally input image data described in the device-dependent color space (hereinafter referred to as “input image data”) into image data described in the color space of the recording medium 10 ( hereinafter referred to as “drawing image data”).
  • the device-dependent color space is, for example, an RGB color space such as sRGB or Adobe (registered trademark) RGB.
  • the color space of the recording medium 10 is a color space that the recording medium 10 has as a characteristic.
  • the drawing system 100 further converts, for example, the image data for drawing obtained by the conversion into output setting values for the drawing unit 150, which will be described later, and inputs the output setting values obtained by the conversion to the drawing unit 150. , drawing on the recording medium 10 is performed. Below, first, the drawing system 100 will be described, and then the recording medium 10 will be described.
  • the drawing system 100 includes, for example, a communication unit 110, an input unit 120, a display unit 130, a storage unit 140, a drawing unit 150, and an information processing unit 160.
  • the drawing system 100 is connected to a network via a communication unit 110, for example.
  • a network is, for example, a communication line such as LAN or WAN.
  • Terminal devices for example, are connected to the network.
  • the drawing system 100 is configured, for example, to be able to communicate with terminal devices via a network.
  • the terminal device is, for example, a mobile terminal, and is configured to be able to communicate with the drawing system 100 via a network.
  • the communication unit 110 communicates with external devices such as terminal devices.
  • the communication unit 110 transmits input image data received from an external device such as a mobile terminal to the information processing unit 160, for example.
  • the input image data is data in which the gradation value of each drawing coordinate is described in a device-dependent color space.
  • the gradation value of each drawing coordinate is composed of, for example, an 8-bit red gradation value, an 8-bit green gradation value, and an 8-bit blue gradation value.
  • the input unit 120 accepts input from the user (eg, execution instructions, data input, etc.).
  • the input unit 120 transmits information input by the user to the information processing unit 160 .
  • the display unit 130 performs screen display based on various screen data created by the information processing unit 160 .
  • the display unit 130 is configured by, for example, a liquid crystal panel or an organic EL (Electro Luminescence) panel.
  • the storage unit 140 stores, for example, a program for converting input image data described in the device-dependent color space into drawing image data described in the color space of the recording medium 10 .
  • the image data for drawing is, for example, data in which the gradation value of each drawing coordinate is described in the color space of the recording medium 10 .
  • the gradation value of each drawing coordinate in the drawing image data is, for example, an 8-bit magenta gradation value, an 8-bit cyan gradation value, and an 8-bit cyan gradation value. It is composed of the yellow tone values of the bits.
  • the storage unit 140 stores, for example, a program for deriving an output setting value of the drawing unit 150 for each drawing coordinate based on the gradation value of the drawing image data obtained by conversion. These programs are collectively expressed as a program 141 in FIG.
  • the information processing unit 160 includes, for example, a CPU (Central Processing Unit) and a GPU (Graphics Processing Unit), and executes various programs (eg, program 141) stored in the storage unit 140.
  • the information processing section 160 executes a series of procedures described in the program 141 by loading the program 141 .
  • FIG. 2 shows a schematic configuration example of the drawing unit 150 .
  • the drawing section 150 has, for example, a signal processing circuit 51 , a laser driving circuit 52 , a light source section 53 , a scanner driving circuit 54 , an X scanner section 55 , a Y stage driving circuit 56 and a Y stage 57 .
  • the drawing unit 150 executes drawing on the recording medium 10 by controlling the output of the light source unit 53 based on the voltage value file (list of command voltage values) input from the information processing unit 160 .
  • the voltage value file list of command voltage values
  • the signal processing circuit 51 acquires the voltage value file (list of command voltage values) input from the information processing section 160 as the image signal Din.
  • the signal processing circuit 51 generates, for example, a pixel signal Dout according to the scanning operation of the X scanner section 55 from the image signal Din.
  • the pixel signal Dout causes the light source section 53 (for example, light sources 53A, 53B, and 53C, which will be described later) to output laser light with power corresponding to the command voltage value.
  • the signal processing circuit 51 controls, together with the laser driving circuit 52, the crest value of the current pulse applied to the light source section 53 (for example, the light sources 53A, 53B, and 53C) according to the pixel signal Dout.
  • the laser drive circuit 52 drives the light sources 53A, 53B, 53C of the light source section 53 according to, for example, the pixel signal Dout.
  • the laser drive circuit 52 controls the luminance (brightness and darkness) of the laser light, for example, in order to draw an image according to the pixel signal Dout.
  • the laser drive circuit 52 has, for example, a drive circuit 52A that drives the light source 53A, a drive circuit 52B that drives the light source 53B, and a drive circuit 52C that drives the light source 53C.
  • the light sources 53A, 53B, and 53C perform drawing on the recording medium 10 by outputting laser light with power corresponding to the command voltage value to the recording medium 10 .
  • the light sources 53A, 53B, and 53C emit near-infrared laser light.
  • the light source 53A is, for example, a semiconductor laser that emits laser light La having an emission wavelength ⁇ 1.
  • the light source 53B is, for example, a semiconductor laser that emits laser light Lb having an emission wavelength ⁇ 2.
  • the light source 53C is, for example, a semiconductor laser that emits laser light Lc having an emission wavelength ⁇ 3.
  • ⁇ 1 is the absorption wavelength (absorption peak wavelength) of the recording layer 13, which will be described later, and is, for example, 915 nm.
  • ⁇ 2 is the absorption wavelength (absorption peak wavelength) of the recording layer 15, which will be described later, and is, for example, 860 nm.
  • ⁇ 3 is the absorption wavelength (absorption peak wavelength) of the recording layer 17, which will be described later, and is, for example, 760 nm.
  • the light source unit 53 has a plurality of light sources (for example, three light sources 53A, 53B, 53C) having different emission wavelengths in the near-infrared region.
  • Each light source (for example, each light source 53A, 53B, 53C) generates laser light including a wavelength corresponding to the absorption wavelength of a photothermal conversion agent (described later) contained in the recording medium 10 .
  • the light source unit 53 further converts a plurality of laser beams (eg, three laser beams La, Lb, and Lc) emitted from a plurality of light sources (eg, three light sources 53A, 53B, and 53C) into predetermined It has an optical system that arranges and outputs in a predetermined direction through a gap.
  • a plurality of irradiation spots Pa, Pb, and Pc generated on the recording medium 10 by a plurality of laser beams La, Lb, and Lc are arranged on the Y stage 57 at predetermined intervals in the X-axis direction.
  • a plurality of laser beams La, Lb, and Lc are output to the X scanner unit 55 so as to line up.
  • the X-axis direction is a direction orthogonal to the movement direction (Y-axis direction) of the Y stage 57 and parallel to the scanning direction of a uniaxial scanner 55a, which will be described later.
  • the light source unit 63 has, for example, two reflecting mirrors 53a and 53d and two dichroic mirrors 53b and 53c as such an optical system.
  • the laser beams La and Lb emitted from the two light sources 53A and 53B are made into substantially parallel light (collimated light) by, for example, a collimator lens. After that, for example, the laser beam La is reflected by the reflecting mirror 53a and the dichroic mirror 53b, and the laser beam Lb is transmitted through the dichroic mirror 53b. As a result, the laser light La and the laser light Lb are output side by side in a predetermined direction. The laser beams La and Lb pass through the dichroic mirror 53c.
  • the laser light Lc emitted from the light source 53C is made into substantially parallel light (collimated light) by, for example, a collimating lens. After that, the laser light Lc is reflected by the reflecting mirror 53d and the dichroic mirror 53c, for example. As a result, the laser beams La and Lb transmitted through the dichroic mirror 53c and the laser beam Lc reflected by the dichroic mirror 53c are output side by side in a predetermined direction.
  • the light source unit 53 outputs laser beams La, Lb, and Lc aligned in a predetermined direction to the X scanner unit 55 by the above optical system, for example.
  • the spot where the laser beam La is reflected and the spot where the laser beam Lb is transmitted may overlap each other.
  • the optical system is configured such that the optical axis of the laser beam La reflected by the dichroic mirror 53b and the optical axis of the laser beam Lb transmitted through the dichroic mirror 53b intersect at a predetermined angle.
  • the spot where the laser beam La is reflected and the spot where the laser beam Lb is transmitted may not completely overlap each other and may be shifted.
  • the spot where the laser beam La is reflected and the spot where the laser beam Lb is transmitted may be separated from each other.
  • the optical system may be configured such that the optical axis of the laser beam La reflected by the dichroic mirror 53b and the optical axis of the laser beam Lb transmitted through the dichroic mirror 53b intersect at a predetermined angle,
  • the optical system may be configured to be parallel to each other.
  • the optical system is configured so that the spot through which the laser beam La or the laser beam Lb is transmitted and the spot through which the laser beam Lc is reflected do not completely overlap with each other and are shifted.
  • the spot through which the laser beam La is transmitted, the spot through which the laser beam Lb is transmitted, and the spot through which the laser beam Lc is reflected may be aligned with a slight shift in a predetermined direction.
  • a spot through which the laser beam La is transmitted, a spot through which the laser beam Lb is transmitted, and a spot through which the laser beam Lc is reflected may be arranged with a predetermined gap therebetween.
  • the optical axis of the laser beam La transmitted through the dichroic mirror 53c, the optical axis of the laser beam Lb transmitted through the dichroic mirror 53c, and the optical axis of the laser beam Lc reflected by the dichroic mirror 53c are at a predetermined angle to each other.
  • the optical system may be configured to intersect at .
  • the light source unit 53 outputs the plurality of laser beams La, Lb, and Lc to the X scanner unit 55 in a state in which the optical axes of the plurality of laser beams La, Lb, and Lc are shifted from each other.
  • the light beams La, Lb, and Lc are output to the X scanner unit 55 so that the optical axes of the plurality of laser beams La, Lb, and Lc intersect each other at a predetermined angle.
  • the optical axis of the laser beam La transmitted through the dichroic mirror 53c, the optical axis of the laser beam Lb transmitted through the dichroic mirror 53c, and the optical axis of the laser beam Lc reflected by the dichroic mirror 53c are arranged parallel to each other.
  • An optical system may be configured.
  • the light source unit 53 outputs the plurality of laser beams La, Lb, and Lc to the X scanner unit 55 in a state in which the optical axes of the plurality of laser beams La, Lb, and Lc are shifted from each other.
  • the light beams La, Lb, and Lc are output to the X scanner unit 55 so that the optical axes of the plurality of laser beams La, Lb, and Lc are parallel to each other with a predetermined gap therebetween.
  • the scanner driving circuit 54 drives the X scanner section 55 based on the control signal input from the signal processing circuit 51, for example. Further, for example, when a signal about the irradiation angle of a uniaxial scanner 55a (to be described later) is input from the X scanner unit 55, the scanner drive circuit 54 adjusts the desired irradiation angle based on the signal. , the X scanner unit 55 is driven.
  • the X scanner unit 55 scans the surface of the recording medium 10 in the X-axis direction with a plurality of laser beams La, Lb, and Lc incident from the light source unit 53, for example.
  • the X scanner section 55 has, for example, a uniaxial scanner 55a and an f ⁇ lens 55b.
  • the uniaxial scanner 55a scans the surface of the recording medium 10 with laser beams La, Lb, and Lc incident from the light source unit 53 in the X-axis direction based on drive signals input from the scanner drive circuit 54, for example. It is a galvanomirror.
  • the f ⁇ lens 55b converts the uniform rotational motion of the uniaxial scanner 55a into uniform linear motion of the spot moving on the focal plane (surface of the recording medium 10).
  • the Y stage drive circuit 56 drives the Y stage 57 based on the control signal input from the signal processing circuit 51, for example.
  • the Y stage 57 moves the recording medium 10 placed on the Y stage 57 with respect to the X scanner unit 55 in the Y-axis direction at a predetermined speed.
  • move to Laser beams La, Lb, and Lc raster scan the surface of the recording medium 10 by coordinated operations of the X scanner unit 55 and the Y stage 57 .
  • FIG. 3 shows a configuration example of each layer included in the recording medium 10.
  • the recording medium 10 is a reversible recording medium on which information can be written (drawn) and erased.
  • the recording medium 10 includes a plurality of recording layers 13, 15, 17 having different color tones.
  • the recording medium 10 has a structure in which, for example, an underlayer 12, a recording layer 13, a heat insulating layer 14, a recording layer 15, a heat insulating layer 16, a recording layer 17, and a protective layer 18 are laminated in this order on a substrate 11. .
  • the three recording layers 13, 15, and 17 are arranged in the order of the recording layer 13, the recording layer 15, and the recording layer 17 from the substrate 11 side.
  • the two heat insulating layers 14 and 16 are arranged in order of the heat insulating layer 114 a and the heat insulating layer 16 from the substrate 11 side.
  • the underlying layer 12 is formed in contact with the surface of the base material 11 .
  • a protective layer 18 is formed on the outermost surface of the recording medium 10 .
  • the base material 11 supports the recording layers 13, 15, 17 and the heat insulating layers 14, 16.
  • the base material 11 functions as a substrate for forming each layer on its surface.
  • the substrate 11 may transmit light or may not transmit light. When the substrate 11 does not transmit light, the color of the surface of the substrate 11 may be, for example, white, or may be a color other than white.
  • the base material 11 is made of ABS resin, for example.
  • the underlayer 12 has a function of improving the adhesion between the recording layer 13 and the substrate 11 .
  • the underlying layer 12 is made of, for example, a material that transmits light.
  • a moisture-resistant barrier layer or a light-resistant barrier layer may be provided on or under the base layer 12 or the base material 11 .
  • a heat insulating layer may be provided between the underlayer 12 and the recording layer 13 .
  • the three recording layers 13, 15, and 17 can reversibly change their state between a colored state and a decolored state.
  • the three recording layers 13, 15, and 17 are configured so that the colors in the developed state are different from each other.
  • Each of the three recording layers 13, 15, 17 contains a color former, a photothermal conversion agent, and a developer/color reducer.
  • the three recording layers 13, 15 and 17 are composed of different color formers and different photothermal conversion agents. In the three recording layers 13, 15 and 17, the color former, the photothermal conversion agent and the developer/color reducer are dispersed in polymeric materials.
  • a leuco dye is used as the color-developing compound.
  • the leuco dye When heated, the leuco dye is combined with a developer/color-reducing agent to form a colored state, or separated from the developer/color-reducing agent to become a decolorized state.
  • the color tone of the leuco dye contained in each of the recording layers 13, 15 and 17 is different for each of the recording layers 13, 15 and 17.
  • FIG. The leuco dye contained in the recording layer 13 develops a magenta color by combining with the developer/color reducing agent by heat.
  • the leuco dye contained in the recording layer 15 develops a cyan color by combining with the developer/color reducing agent by heat.
  • the leuco dye contained in the recording layer 17 develops a yellow color by being combined with the developer/color reducing agent by heat.
  • the positional relationship of the three recording layers 13, 15, 17 is not limited to the above example. Also, the three recording layers 13, 15 and 17 become transparent in the decolored state. As a result, the recording medium 10 can record an image using colors in a wide color gamut.
  • a photothermal conversion agent absorbs light in the near-infrared region (700 nm to 2500 nm) and emits heat.
  • the near-infrared region refers to a wavelength band of 700 nm to 2500 nm.
  • the absorption wavelengths of the photothermal conversion agents contained in the respective recording layers 13, 15 and 17 are different from each other in the near-infrared region (700 nm to 2500 nm).
  • the photothermal conversion agent contained in the recording layer 13 has, for example, an absorption peak at 915 nm.
  • the photothermal conversion agent contained in the recording layer 15 has, for example, an absorption peak at 860 nm.
  • the photothermal conversion agent contained in the recording layer 17 has, for example, an absorption peak at 760 nm.
  • the absorption peak of the photothermal conversion agent contained in each recording layer 13, 15, 17 is not limited to the above examples.
  • the heat insulating layer 14 is for making it difficult for heat to be conducted between the recording layer 13 and the recording layer 15 .
  • the heat insulating layer 16 is intended to make it difficult for heat to be conducted between the recording layer 15 and the recording layer 17 .
  • the protective layer 18 is for protecting the surface of the recording medium 10 and functions as an overcoat layer for the recording medium 10 .
  • the heat insulating layers 14, 16 and protective layer 18 are made of a transparent material.
  • the recording medium 10 may include, for example, a relatively rigid resin layer (for example, a PEN resin layer) directly below the protective layer 18 .
  • the protective layer 18 may include a moisture-resistant barrier layer or a light-resistant barrier layer. Protective layer 18 may also include any functional layer.
  • leuco dyes examples include existing thermal paper dyes.
  • a specific example thereof is a compound containing, for example, an electron-donating group in the molecule, represented by Chemical Formula 1 below.
  • the color-forming compound is not particularly limited and can be appropriately selected according to the purpose.
  • Specific color-developing compounds include, in addition to the compounds shown in Chemical Formula 1, fluorane compounds, triphenylmethanephthalide compounds, azaphthalide compounds, phenothiazine compounds, leuco auramine compounds and indoles. A nophthalide compound etc. are mentioned.
  • 2-anilino-3-methyl-6-diethylaminofluorane 2-anilino-3-methyl-6-di(n-butylamino)fluorane, 2-anilino-3-methyl-6-(N -n-propyl-N-methylamino)fluorane, 2-anilino-3-methyl-6-(N-isopropyl-N-methylamino)fluorane, 2-anilino-3-methyl-6-(N-isobutyl-N -methylamino)fluorane, 2-anilino-3-methyl-6-(Nn-amyl-N-methylamino)fluorane, 2-anilino-3-methyl-6-(N-sec-butyl-N-methyl amino) fluorane, 2-anilino-3-methyl-6-(Nn-amyl-N-ethylamino) fluorane, 2-anilino-3-methyl-6-(N-iso-
  • the developer/color-reducer is for, for example, developing a colorless color-forming compound or decoloring a color-forming compound exhibiting a predetermined color.
  • developer/color reducing agents include phenol derivatives, salicylic acid derivatives and urea derivatives.
  • a compound having a salicylic acid skeleton shown in Chemical Formula 2 below and containing an electron-accepting group in the molecule can be mentioned.
  • developer/color reducing agents include 4,4'-isopropylidenebisphenol, 4,4'-isopropylidenebis(o-methylphenol), 4,4'-secondary butylidenebisphenol, 4,4' -isopropylidenebis(2-tert-butylphenol), zinc p-nitrobenzoate, 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanuric acid, 2,2 -(3,4'-dihydroxydiphenyl)propane, bis(4-hydroxy-3-methylphenyl)sulfide, 4- ⁇ -(p-methoxyphenoxy)ethoxy ⁇ salicylic acid, 1,7-bis(4-hydroxyphenyl) thio)-3,5-dioxaheptane, 1,5-bis(4-hydroxyphenythio)-5-oxapentane, monobenzyl phthalate monocalcium salt, 4,4′-cyclohe
  • the photothermal conversion agent is, for example, one that generates heat by absorbing light in a predetermined wavelength range in the near-infrared region.
  • the photothermal conversion agent it is preferable to use, for example, a near-infrared absorbing dye that has an absorption peak in the wavelength range of 700 nm or more and 2000 nm or less and has almost no absorption in the visible region.
  • phthalocyanine dyes compounds having a phthalocyanine skeleton (phthalocyanine dyes), compounds having a naphthalocyanine skeleton (naphthalocyanine dyes), compounds having a squarylium skeleton (squarylium dyes), metal complexes such as dithio complexes, diimmonium Salts, aminium salts, inorganic compounds, and the like.
  • inorganic compounds include graphite, carbon black, metal powder particles, tricobalt tetraoxide, iron oxide, chromium oxide, copper oxide, titanium black and metal oxides such as ITO, metal nitrides such as niobium nitride, tantalum carbide, and the like.
  • a compound having a cyanine skeleton (cyanine dye) having excellent light resistance and heat resistance may be used.
  • Such a compound having a cyanine skeleton includes a counter ion of SbF6 , PF6 , BF4 , ClO4 , CF3SO3 and ( CF3SO3 )2N in the molecule, and a methine chain containing a 5- or 6-membered ring.
  • the cyanine dye preferably has both of the above counter ions and a cyclic structure such as a 5-membered ring and a 6-membered ring in the methine chain. and heat resistance are ensured. Materials with excellent light resistance and heat resistance do not decompose during laser irradiation as described above.
  • As means for confirming the light resistance for example, there is a method of measuring the peak change of the absorption spectrum during a xenon lamp irradiation test. If the rate of change after irradiation for 30 minutes is 20% or less, it can be judged that the light resistance is good.
  • As means for confirming the heat resistance for example, there is a method of measuring the peak change of the absorption spectrum during storage at 150°C. If the rate of change after the 30-minute test is 20% or less, it can be judged that the heat resistance is good.
  • the polymeric material is preferably one in which the color former, developer/color reducer, and photothermal conversion agent are easily dispersed uniformly.
  • the polymeric material preferably has high transparency, and for example, preferably has high solubility in organic solvents.
  • Polymeric materials include, for example, thermosetting resins and thermoplastic resins.
  • polyvinyl chloride polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, ethyl cellulose, polystyrene, styrenic copolymer, phenoxy resin, polyester, aromatic polyester, polyurethane, polycarbonate, polyacrylic acid
  • the recording layers 13, 15, and 17 each contain at least one kind of each of the above-described color former, developer/color reducer, and photothermal conversion agent.
  • the photothermal conversion agent varies depending on the film thickness of the recording layers 13 , 15 and 17 .
  • the recording layers 13, 15 and 17 may also contain various additives such as sensitizers and ultraviolet absorbers in addition to the above materials.
  • the protective layer 18 is for suppressing entry of moisture and/or oxygen into the recording layers 13, 15 and 17.
  • FIG. A protective layer 18 covers the surface of the recording layer 17 .
  • the protective layer 18 preferably has a water vapor transmission rate of, for example, 0.001 g/m 2 /day or more and 10 g/m 2 /day or less.
  • the protective layer 18 should have high transparency in order to obtain high visibility of the information written in the recording layers 13, 15 and 17 in the same manner as the polymer material constituting the recording layers 13, 15 and 17. is preferred.
  • Examples of such a protective layer 18 include a laminated film in which an inorganic oxide film is provided on a substrate made of a plastic film.
  • the protective layer 18 configured as a laminated film of a plastic film and an inorganic oxide film covers the recording layer 17 so that, for example, the inorganic oxide film is on the recording layer 17 side (inner side) and the plastic film is on the outer side.
  • the plastic film that serves as the substrate can be, for example, an industrial plastic film, and is formed using at least one of polyethylene terephthalate (PET), polycarbonate (PC) and polymethyl methacrylate (PMMA). can be done.
  • PET polyethylene terephthalate
  • PC polycarbonate
  • PMMA polymethyl methacrylate
  • the thickness of the plastic film is preferably, for example, 5 ⁇ m or more and 100 ⁇ m or less.
  • the inorganic oxide film examples include a silicon oxide film (SiO x film), an aluminum oxide film (AlO x film) and a silicon nitride film formed using a sputtering method, a chemical vapor deposition (CVD) method, or the like. (SiN x film).
  • the thickness of the protective layer 18 is preferably 10 nm or more and 1 ⁇ m or less, for example.
  • the information processing unit 160 converts the input image data described in the RGB color space into leuco image data described in the leuco color space.
  • the information processing section 160 derives a voltage value file (list of command voltage values) based on the gradation value of each color of each drawing coordinate of the leuco image data obtained by the conversion.
  • the information processing section 160 transmits the derived voltage value file (list of command voltage values) to the drawing section 150 .
  • the signal processing circuit 51 of the drawing unit 60 acquires the voltage value file (list of command voltage values) input from the information processing unit 160 as the image signal Din.
  • the signal processing circuit 51 synchronizes with the scanning operation of the X scanner unit 55 from the image signal Din and generates an image signal according to the characteristics such as the wavelength of the laser light.
  • the signal processing circuit 51 generates a projection image signal that emits laser light according to the generated image signal.
  • the signal processing circuit 51 outputs the generated projection image signal to the laser drive circuit 52 of the drawing section 150 .
  • the laser drive circuit 52 drives the light sources 53A, 53B, and 53C of the light source section 53 according to projection video signals corresponding to each wavelength. At this time, the laser drive circuit 52 causes at least one of the light sources 53A, 53B, and 53C to emit a laser beam to scan the recording medium 10 .
  • laser light La with an emission wavelength of 760 nm is absorbed by the photothermal conversion agent in the recording layer 17, and the leuco dye in the recording layer 17 reaches the writing temperature due to the heat generated from the photothermal conversion agent.
  • the yellow color density depends on the intensity of the laser light La with an emission wavelength of 760 nm.
  • the laser light Lb having an emission wavelength of 860 nm is absorbed by the photothermal conversion agent in the recording layer 15, and the leuco dye in the recording layer 15 reaches the writing temperature due to the heat generated from the photothermal conversion agent.
  • the color density of cyan depends on the intensity of the laser light Lb with an emission wavelength of 860 nm.
  • the laser light Lc having an emission wavelength of 915 nm is absorbed by the photothermal conversion agent in the recording layer 13, and the leuco dye in the recording layer 13 reaches the writing temperature due to the heat generated from the photothermal conversion agent.
  • the density of the magenta color depends on the intensity of the laser light Lc with an emission wavelength of 915 nm. As a result, the desired color is produced by mixing yellow, cyan and magenta colors.
  • FIG. 4 shows how information is written to the recording medium 10 by the drawing unit 150 .
  • FIG. 4 exemplifies the cross-sectional configuration of the recording medium 10, and further shows how the laser beams La, Lb, and Lc are scanned from left to right on the paper surface through predetermined gaps ⁇ X1 and ⁇ X2. exemplified.
  • a mechanism consisting of the scanner driving circuit 54, the X scanner section 55, the Y stage driving circuit 56, and the Y stage 57 converts the plurality of laser beams La, Lb, and Lc generated by the light source section 53 into predetermined It functions as a scanning unit that irradiates the surface of the recording medium 10 through the gaps ⁇ X1 and ⁇ X2.
  • This mechanism also synchronously scans the surface of the recording medium 10 with a plurality of laser beams La, Lb, and Lc in the same direction.
  • a plurality of irradiation spots Pa, Pb, and Pc by a plurality of laser beams La, Lb, and Lc are aligned in the same direction as the scanning direction (X-axis direction) of the plurality of laser beams La, Lb, and Lc by a predetermined gap ⁇ X1. , ⁇ X2, the surface of the recording medium 10 is scanned with a plurality of laser beams La, Lb, and Lc.
  • the gap ⁇ X1 between the irradiation spot Pa of the laser beam La and the irradiation spot Pb of the laser beam Lb is the high-temperature region Ra generated in the recording layer 13 and its surroundings by the laser beam La and the recording layer 15 and its surroundings caused by the laser beam Lb. It is preferable that the high-temperature region Rb has a size that does not overlap each other.
  • the gap ⁇ X1 is, for example, 0.6 mm.
  • the gap ⁇ X2 between the irradiation spot Pb of the laser beam Lb and the irradiation spot Pc of the laser beam Lc consists of a high-temperature region Rb generated in the recording layer 15 and its surroundings by the laser beam Lb and a high-temperature region Rb generated in the recording layer 17 and its surroundings by the laser beam Lc. It is preferable that the high-temperature region Rc generated in the region is large enough not to overlap with each other.
  • the gap ⁇ X2 is, for example, 0.6 mm.
  • the laser beams La, Lb, and Lc irradiate the same spot P1 (same pixel) on the recording medium 10 . Therefore, the high temperature region Ra and the high temperature region Rb partially overlap each other, and the high temperature region Rb and the high temperature region Rc partially overlap each other. As a result, in the comparative example shown in FIG. 5, thermal crosstalk occurs between two recording layers adjacent in the stacking direction, resulting in unexpected writing and erasing.
  • the entire recording medium 10 is sequentially irradiated with laser beams La, Lb, and Lc. Accordingly, the high temperature region Ra and the high temperature region Rb do not overlap each other, and the high temperature region Rb and the high temperature region Rc do not overlap each other.
  • the drawing takes three times as long as the comparative example shown in FIG.
  • the plurality of laser beams La, Lb, and Lc generated by the light source unit 53 are irradiated onto the surface of the recording medium 10 via the predetermined gaps ⁇ X1 and ⁇ X2, and the plurality of laser beams
  • the light beams La, Lb, and Lc scan the surface of the recording medium 10 synchronously in the same direction. This can reduce the occurrence of thermal crosstalk between the recording layers 13 and 15 adjacent in the stacking direction and between the recording layers 15 and 17 adjacent in the stacking direction. As a result, it is possible to reduce the possibility of unexpected writing or erasing.
  • the irradiation spots Pa, Pb, and Pc are aligned in the same direction as the scanning direction (X-axis direction) of the plurality of laser beams La, Lb, and Lc with predetermined gaps ⁇ X1 and ⁇ X2.
  • a plurality of laser beams La, Lb, and Lc scan the surface of the recording medium 10 . This can reduce the occurrence of thermal crosstalk between the recording layers 13 and 15 adjacent in the stacking direction and between the recording layers 15 and 17 adjacent in the stacking direction. As a result, it is possible to reduce the possibility of unexpected writing or erasing.
  • a mechanism for scanning a plurality of laser beams La, Lb, and Lc in the X-axis direction and a Y stage 47 for moving the recording medium 10 in the Y-axis direction are provided. This makes it possible to realize raster scanning while reducing the occurrence of thermal crosstalk.
  • raster scanning is performed by scanning the plurality of laser beams La, Lb, and Lc in the X-axis direction and moving the recording medium 10 in the Y-axis direction. This makes it possible to realize raster scanning while reducing the occurrence of thermal crosstalk.
  • the plurality of laser beams La, Lb, and Lc are output to the X scanner unit 55 with the optical axes of the plurality of laser beams La, Lb, and Lc shifted from each other.
  • a plurality of laser beams La, Lb, and Lc are irradiated onto the surface of the recording medium 10 through predetermined gaps ⁇ X1 and ⁇ X2, so that the recording layers 13 and 15 adjacent in the lamination direction and It is possible to reduce the occurrence of thermal crosstalk between the recording layers 15 and 17 adjacent in direction. As a result, it is possible to reduce the possibility of unexpected writing or erasing.
  • the plurality of laser beams La, Lb, and Lc are scanned by the X scanner so that the optical axes of the plurality of laser beams La, Lb, and Lc are parallel to each other with predetermined gaps ⁇ X1 and ⁇ X2 interposed therebetween. It is output to the unit 55 .
  • a plurality of laser beams La, Lb, and Lc are irradiated onto the surface of the recording medium 10 through predetermined gaps ⁇ X1 and ⁇ X2, so that the recording layers 13 and 15 adjacent in the lamination direction and It is possible to reduce the occurrence of thermal crosstalk between the recording layers 15 and 17 adjacent in direction. As a result, it is possible to reduce the possibility of unexpected writing or erasing.
  • the plurality of laser beams La, Lb, and Lc are output to the X scanner unit 55 so that the optical axes of the plurality of laser beams La, Lb, and Lc intersect each other at a predetermined angle. .
  • a plurality of laser beams La, Lb, and Lc are irradiated onto the surface of the recording medium 10 through predetermined gaps ⁇ X1 and ⁇ X2, so that the recording layers 13 and 15 adjacent in the lamination direction and It is possible to reduce the occurrence of thermal crosstalk between the recording layers 15 and 17 adjacent in direction. As a result, it is possible to reduce the possibility of unexpected writing or erasing.
  • FIG. 7 shows a modified example of the schematic configuration of the drawing system 100 according to the above embodiment.
  • raster scanning is realized by scanning the laser beams La, Lb, and Lc in the X-axis direction with the X-scanner unit 55 and moving the Y-stage 57 in the Y-axis direction.
  • Raster scanning may be achieved by using 55A and fixed stage 57A.
  • the XY scanner drive circuit 54A drives the XY scanner section 55A based on control signals input from the signal processing circuit 51, for example. For example, when a signal about the irradiation angle of a biaxial scanner 55c described later is input from the XY scanner unit 55A, the XY scanner drive circuit 54A achieves a desired irradiation angle based on the signal.
  • the XY scanner unit 55A is driven as follows.
  • the XY scanner unit 55A scans the surface of the recording medium 10 with the laser beams La, Lb, and Lc incident from the light source unit 53, for example, in the X-axis direction, and scans the scan line in the Y-axis direction at a predetermined step width. move to The XY scanner section 55A has, for example, a biaxial scanner 55c and an f ⁇ lens 55b.
  • the biaxial scanner 55c scans the surface of the recording medium 10 in the X-axis direction with the laser beams La, Lb, and Lc incident from the light source unit 53, for example, based on drive signals input from the XY scanner drive circuit 54A.
  • the fixed stage 57A is a platform that simply supports the recording medium 10. As shown in FIG.
  • an XY scanner unit that scans a plurality of laser beams La, Lb, and Lc in the X-axis direction and moves the scan line of the plurality of laser beams La, Lb, and Lc in the Y-axis direction at a predetermined step width. 55A is provided. This makes it possible to realize raster scanning while reducing the occurrence of thermal crosstalk.
  • the plurality of laser beams La, Lb, and Lc are scanned in the X-axis direction, and the plurality of laser beams La, Lb, and Lc are scanned at a predetermined step width.
  • Raster scanning is performed by moving the scan line in the Y-axis direction. This makes it possible to realize raster scanning while reducing the occurrence of thermal crosstalk.
  • FIG. 8 shows a modified example of the schematic configuration of the drawing system 100 according to the above embodiment.
  • raster scanning is realized by scanning the laser beams La, Lb, and Lc in the X-axis direction with the X-scanner unit 55 and moving the Y-stage 57 in the Y-axis direction.
  • raster scanning may be achieved by using XY stage drive circuit 56A and XY stage 57B.
  • the light source section 53D corresponds to the light source section 53 further provided with a condensing lens 53e for condensing the laser beams La, Lb, and Lc.
  • the XY stage driving circuit 56A drives the XY stage 57B based on control signals input from the signal processing circuit 51, for example.
  • the XY stage 57B moves the XY stage 57B at a predetermined speed in the X-axis direction and at a predetermined step width in the Y-axis direction.
  • Laser beams La, Lb, and Lc raster scan the surface of the recording medium 10 by the operation of the XY stage 57B.
  • an XY stage 57B that scans the plurality of laser beams La, Lb, and Lc in the X-axis direction and moves the scan line of the plurality of laser beams La, Lb, and Lc in the Y-axis direction at a predetermined step width.
  • FIG. 9 shows a modified example of the schematic configuration of the drawing system 100 according to the above embodiment.
  • an optical system including the dichroic mirror 53b is used to output the laser beams La, Lb, and Lc arranged in a predetermined direction with a predetermined gap therebetween.
  • the laser beams La, Lb, and Lc may be arranged in a predetermined direction with a predetermined gap therebetween and output.
  • the light source unit 53E has, for example, three light sources 53A, 53B, 53C, three optical fibers 53f, 53g, 53h, a fiber folder 53i, and a condenser lens 53j, as shown in FIG. is doing.
  • the optical fiber 53f is connected to the light source 53A and propagates the laser beam La emitted from the light source 53A.
  • the optical fiber 53g is connected to the light source 53B and propagates the laser light Lb emitted from the light source 53B.
  • the optical fiber 53h is connected to the light source 53C and propagates the laser light Lc emitted from the light source 53C.
  • the fiber folder 53i holds the tip portions of the three optical fibers 53f, 53g, and 53h side by side in a predetermined direction.
  • the condenser lens 53j condenses the laser beams La, Lb, and Lc emitted from the tip portions of the three optical fibers 53f, 53g, and 53h. Laser beams La, Lb, and Lc condensed by the condensing lens 53 j are output to the X scanner section 55 .
  • a plurality of laser beams La, Lb, and Lc are output to the X scanner section 55 via optical fibers 53f, 53g, and 53h separately provided for each of the laser beams La, Lb, and Lc.
  • a plurality of laser beams La, Lb, and Lc are irradiated onto the surface of the recording medium 10 through predetermined gaps ⁇ X1 and ⁇ X2, so that the recording layers 13 and 15 adjacent in the lamination direction and It is possible to reduce the occurrence of thermal crosstalk between the recording layers 15 and 17 adjacent in direction. As a result, it is possible to reduce the possibility of unexpected writing or erasing.
  • FIG. 10 shows a modified example of the schematic configuration of the drawing system 100 according to Modified Example A described above.
  • an optical system including a dichroic mirror 53b is used to output the laser beams La, Lb, and Lc arranged in a predetermined direction with a predetermined gap therebetween.
  • the laser beams La, Lb, and Lc may be arranged in a predetermined direction with a predetermined gap therebetween and output. Even in this case, raster scanning can be achieved while reducing the occurrence of thermal crosstalk.
  • FIG. 11 shows a modified example of the schematic configuration of the drawing system 100 according to the modified example B.
  • an optical system including a dichroic mirror 53b is used to output the laser beams La, Lb, and Lc arranged in a predetermined direction with a predetermined gap therebetween.
  • the laser beams La, Lb, and Lc may be arranged in a predetermined direction with a predetermined gap therebetween and output. For example, as shown in FIG.
  • the light source unit 53F has three light sources 53A, 53B, 53C, three optical fibers 53f, 53g, 53h, a fiber folder 53i, and a condenser lens 53e. there is Even in this case, raster scanning can be achieved while reducing the occurrence of thermal crosstalk.
  • [Modification F] 12 and 13 show a modification of the drawing method in the drawing system 100 according to the embodiment and its modification.
  • the laser beams La, Lb, and Lc are scanned in a direction parallel to the X-axis direction with a predetermined gap between them.
  • the laser beams La, Lb, and Lc may be scanned in the X-axis direction with a predetermined gap in the direction perpendicular to the X-axis direction (Y-axis direction). .
  • FIG. 12 shows a predetermined gap in the direction perpendicular to the X-axis direction (Y-axis direction).
  • the laser beams La, Lb, and Lc are scanned in the X-axis direction through a predetermined gap in a direction that obliquely intersects the X-axis direction and the Y-axis direction. good. Even in these cases, it is possible to realize raster scanning while reducing the occurrence of thermal crosstalk.
  • the present disclosure can have the following configuration.
  • a drawing system for drawing on a recording medium in which a plurality of recording layers each containing a different color former and a different photothermal conversion agent are laminated via a heat insulating layer, a light source unit for generating a plurality of laser beams having wavelengths different from each other and including wavelengths corresponding to absorption wavelengths of the photothermal conversion agent;
  • a plurality of laser beams generated by the light source unit are irradiated onto the surface of the recording medium through a predetermined gap, and the plurality of laser beams are synchronized in the same direction on the surface of the recording medium.
  • a rendering system comprising a scanning section for scanning and a .
  • the scanning unit scans the surface of the recording medium with the plurality of laser beams while the irradiation spots of the plurality of laser beams are aligned in the same direction as the scanning direction of the plurality of laser beams with a predetermined gap.
  • the scanning unit scans the plurality of laser beams in a first direction and moves the scanning lines of the plurality of laser beams in a second direction orthogonal to the first direction at a predetermined step width.
  • the drawing system according to (1) or (2) which has a system.

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PCT/JP2022/002331 2021-03-31 2022-01-24 描画システムおよび描画方法 Ceased WO2022209205A1 (ja)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4610982A4 (en) * 2022-10-26 2026-03-11 Sony Group Corp DRAWING DEVICE AND METHOD FOR FORMING A DRAWN OBJECT

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025053270A1 (ja) * 2023-09-06 2025-03-13 ソニーグループ株式会社 描画システム

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004188829A (ja) * 2002-12-12 2004-07-08 Sony Corp 可逆性多色記録媒体の記録装置
JP2004249539A (ja) * 2003-02-19 2004-09-09 Sony Corp 可逆性多色記録媒体の記録装置
JP2004249540A (ja) * 2003-02-19 2004-09-09 Sony Corp 可逆性多色記録媒体の記録装置
JP2008213440A (ja) * 2006-03-15 2008-09-18 Ricoh Co Ltd 画像処理方法及び画像処理装置
US20150277221A1 (en) * 2012-10-11 2015-10-01 Agfa-Gevaert Colour laser marking
WO2020090402A1 (ja) * 2018-10-30 2020-05-07 ソニー株式会社 描画方法および消去方法ならびに描画装置

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08267797A (ja) * 1995-03-29 1996-10-15 Toppan Printing Co Ltd レーザ記録方法及びレーザ記録装置
JPH0958025A (ja) 1995-08-21 1997-03-04 Sony Corp カラー画像プリント装置
JP2004188827A (ja) 2002-12-12 2004-07-08 Sony Corp 可逆性多色記録媒体の記録装置
JP3735779B2 (ja) 2003-04-25 2006-01-18 宗宏 伊達 可逆感熱媒体の情報書換装置及び方法
JP2005138558A (ja) * 2003-11-10 2005-06-02 Fuji Photo Film Co Ltd カラー感熱記録方法及びカラー感熱記録装置
JP4586353B2 (ja) 2003-11-18 2010-11-24 ソニー株式会社 記録方法
JP5255218B2 (ja) * 2006-03-14 2013-08-07 株式会社リコー 画像処理方法
JP2007331381A (ja) * 2006-05-19 2007-12-27 Toshiba Tec Corp 感熱媒体用記録装置及び感熱媒体用記録方法
US7804759B2 (en) * 2006-11-27 2010-09-28 Toshiba Tec Kabushiki Kaisha Contactless optical writing apparatus
JP5447783B2 (ja) * 2008-12-10 2014-03-19 株式会社リコー 光走査装置、この光走査装置を備えた画像形成装置
GB201112645D0 (en) * 2011-07-22 2011-09-07 Datalase Ltd An inkless printing method
EP3210790B1 (en) * 2016-02-05 2020-04-08 Ricoh Company, Ltd. Recording method and recording device
EP3636443B1 (en) * 2017-06-08 2021-11-03 Sony Group Corporation Optical device and irradiation method
JP7060016B2 (ja) * 2017-06-20 2022-04-26 ソニーグループ株式会社 消去装置および消去方法
JP6976115B2 (ja) 2017-09-20 2021-12-08 株式会社東芝 レーザ記録装置および方法
WO2020054330A1 (ja) * 2018-09-14 2020-03-19 ソニー株式会社 描画システム、および、変換プロファイルの作成方法
JP7562247B2 (ja) 2019-10-11 2024-10-07 アサヒ飲料株式会社 ブドウ果汁含有飲料及び泡立ち抑制方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004188829A (ja) * 2002-12-12 2004-07-08 Sony Corp 可逆性多色記録媒体の記録装置
JP2004249539A (ja) * 2003-02-19 2004-09-09 Sony Corp 可逆性多色記録媒体の記録装置
JP2004249540A (ja) * 2003-02-19 2004-09-09 Sony Corp 可逆性多色記録媒体の記録装置
JP2008213440A (ja) * 2006-03-15 2008-09-18 Ricoh Co Ltd 画像処理方法及び画像処理装置
US20150277221A1 (en) * 2012-10-11 2015-10-01 Agfa-Gevaert Colour laser marking
WO2020090402A1 (ja) * 2018-10-30 2020-05-07 ソニー株式会社 描画方法および消去方法ならびに描画装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4610982A4 (en) * 2022-10-26 2026-03-11 Sony Group Corp DRAWING DEVICE AND METHOD FOR FORMING A DRAWN OBJECT

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