Source: http://www.google.com/patents/US7869340?ie=ISO-8859-1
Timestamp: 2014-12-26 04:16:44
Document Index: 435775091

Matched Legal Cases: ['Application No. 2000', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005']

Patent US7869340 - Method of printing label on optical disk, optical disk unit, and optical disk - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA visible light characteristic changing layer formed from photosensitive or heat-sensitive material is formed in a location which can be viewed from a part of a label surface of an optical disk. The optical disk is set on a turntable of an optical disk unit while the label surface of the optical disk...http://www.google.com/patents/US7869340?utm_source=gb-gplus-sharePatent US7869340 - Method of printing label on optical disk, optical disk unit, and optical diskAdvanced Patent SearchPublication numberUS7869340 B2Publication typeGrantApplication numberUS 11/834,241Publication dateJan 11, 2011Filing dateAug 6, 2007Priority dateOct 30, 2000Fee statusPaidAlso published asUS7015939, US7268794, US7336292, US7336293, US7436420, US7471305, US7561174, US7675535, US20020191517, US20050281149, US20050281152, US20050281181, US20050281182, US20050281183, US20060132593, US20060197824, US20070286057, US20090003151Publication number11834241, 834241, US 7869340 B2, US 7869340B2, US-B2-7869340, US7869340 B2, US7869340B2InventorsKazuhiko Honda, Tamon KondoOriginal AssigneeYamaha CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (99), Non-Patent Citations (9), Referenced by (2), Classifications (29), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetMethod of printing label on optical disk, optical disk unit, and optical diskUS 7869340 B2Abstract A visible light characteristic changing layer formed from photosensitive or heat-sensitive material is formed in a location which can be viewed from a part of a label surface of an optical disk. The optical disk is set on a turntable of an optical disk unit while the label surface of the optical disk is directed downward. The optical disk and an optical pickup are moved mutually along the plane of the optical disk. In synchronism with the relative movement, the power of a laser beam output from the optical pickup is modulated in accordance with image data, such as characters or graphic images to be printed, and the laser beam is emitted onto the visible light characteristic changing layer. As a result of the visible light characteristic changing layer being exposed to the laser beam, a visible-light reflectivity of the visible light characteristic changing layer is changed, thereby forming a image corresponding to the image data on the label surface.
1. An optical disk, being recordable and image-formable by irradiation of a laser beam of an optical pickup, the optical disk comprising:
a data surface on which a recording layer is formed for data recording by the irradiation of the laser beam via a substrate; and
a label surface, opposed to the data surface, on which a visible light characteristic changing layer is formed for visible image-forming via a protective layer,
wherein the visible light characteristic changing layer having a visible characteristic thereof changed by exposure to a laser beam that enters from a label surface side, the visible light characteristic changing layer being formed in a location capable of being viewed from the label surface side, wherein a light scattering layer, which is translucence and has a light scattering characteristic, is interposed between a first reflection layer of the optical disk and the visible light characteristic changing layer.
2. The optical disk according to claim 1, wherein the light scattering layer serves as an intermediate layer.
3. An optical disk, being recordable and image-formable by irradiation of a laser beam of an optical pickup, the optical disk comprising:
a data surface;
a first substrate provided on the data surface;
a recording layer provided on the substrate, and being recordable by the irradiation of the laser beam;
a first reflection layer provided on the recording layer;
a visible light characteristic changing layer provided on the reflection layer, a visible light characteristic thereof being changed by exposure to a laser beam;
a label surface provided on the protection layer,
further comprising a light scattering layer provided between the first reflection layer and the visible light characteristic changing layer.
4. The optical disk according to claim 3, further comprising:
a buffer layer provided on the first reflection layer; and
a second reflection layer provided between the buffer layer and the visible light characteristic changing layer.
5. The optical disk according to claim 3, further comprising:
a second substrate provided on the first reflection layer; and
a second reflection layer provided on the second substrate.
6. An optical storage media, being recordable and image-formable by irradiation of a laser beam of an optical pickup, the optical storage media comprising:
a data surface on which a recording layer is formed for data-recording by the irradiation of the laser beam via a substrate; and
a label surface, opposed to the data surface, on which a visible light characteristic changing layer is formed for visible image-forming via a protective layer;
the visible light characteristic changing layer arranged over the reflection layer, wherein a visible light characteristic thereof is changed by exposure to the laser beam; and
a translucence layer formed adjacent to the visible light characteristic changing layer.
7. The optical storage media according to claim 6, wherein the translucence layer is an intermediate layer formed between the visible light characteristic changing layer and the reflective layer.
8. The optical storage media according to claim 6, wherein the protective layer is arranged over the visible light characteristic changing layer.
9. The optical storage media according to claim 6, wherein the visible light characteristic changing layer is a color changing layer, photosensitive layer or a heat sensitive layer.
10. The optical storage media according to claim 9, wherein the color changing layer is formed from two layers which are fused or mixed together when exposed to the laser beam.
11. The optical storage media according to claim 6, further comprising:
a second reflection layer provided adjacent to the reflection layer.
a layer provided between the second reflection layer and the reflection layer.
13. The optical storage media according to claim 12, wherein the layer provided between the second reflection layer and the reflection layer is a buffer layer.
14. The optical storage media according to claim 12, wherein the layer provided between the second reflection layer and the reflection layer is a substrate.
15. An optical storage media, being recordable and image-formable by irradiation of a laser beam of an optical pickup, the optical storage media comprising:
a light scattering layer formed adjacent to the visible light characteristic changing layer.
16. The optical storage media according to claim 15, wherein the light scattering layer is an intermediate layer formed between the visible light characteristic changing layer and the reflective layer.
17. The optical storage media according to claim 15, wherein the protective layer is arranged over the visible light characteristic changing layer.
18. The optical storage media according to claim 15, wherein the visible light characteristic changing layer is a color changing layer, photosensitive layer or a heat sensitive layer.
19. The optical storage media according to claim 18, wherein the color changing layer is formed from two layers which are fused or mixed together when exposed to the laser beam.
20. The optical storage media according to claim 15, further comprising:
21. The optical storage media according to claim 20, further comprising:
22. The optical storage media according to claim 21, wherein the layer provided between the second reflection layer and the reflection layer is a buffer layer.
23. The optical storage media according to claim 21, wherein the layer provided between the second reflection layer and the reflection layer is a substrate. Description
CROSS REFERENCE TO RELATED APPLICATION This application is a divisional of U.S. patent application Ser. No. 10/053,238, filed Oct. 29, 2001, which claims priority under 35 U.S.C. �119 to Japanese Patent Application No. 2000-330359, filed Oct. 30, 2000, the entire disclosure of which is herein expressly incorporated by reference.
SUMMARY OF THE INVENTION The present invention has been conceived in light of the foregoing problem and aims at providing a method or forming an image on a label surface of an optical disk, an optical disk unit, and an optical disk, wherein an image is formed on a label surface of an optical disk by utilization of a laser beam output from an optical disk unit, thereby obviating a necessity for writing of an image performed with a pen or printing an image with a printer.
The present invention provides a method of forming an image on a label surface of an optical disk, the method comprising the steps of: forming a visible light characteristic changing layer in a position which can be viewed from a label surface side of an optical disk, the layer changing a characteristic or visible light having entered from the label surface side by exposure to a laser beam used for recording a signal and emitted from the part of the label surface; setting the optical disk on a turntable of an optical disk unit such that a label surface of the optical disk is oriented toward a direction in which a laser beam emitted from an optical pickup is to enter; relatively moving the optical disk and the laser beam along a plane of the optical disk; and modulating the laser beam, in synchronism with the mutual movement, into a specific characteristic in accordance with image data to be printed, such as characters or graphic images, and emitting the modulated laser beam onto the visible light characteristic changing layer from the part of the label surface, wherein a reflection characteristic of the visible light having entered the visible light characteristic changing layer is changed by means of exposure, thereby printing a corresponding image on the label surface. According to the label surface image formation method, a laser beam output from the optical disk unit can be emitted onto the visible light characteristic changing layer formed in an area which can be viewed from the part of a label surface of an optical disk, thereby changing the reflectivity, permeability, or light-scattering characteristic of the visible light. In this way, corresponding images, such as characters or graphic images, can be formed on the label surface, thereby obviating a necessity of writing images with a pen or printing images with a printer.
Preferably, the relative movement mechanism includes a rotary drive device for rotationally driving a turntable and a radial-direction feed drive device for moving the optical pickup in a radial direction of the optical disk; wherein the control circuit can control the rotary drive device and the radial-direction food drive device, thereby controlling relative movement between the optical disk and the laser beam. In this case, the control circuit can drive the rotary drive device to a constant rotating speed, thereby driving the radial-direction feed drive device by a predetermined amount at each predetermined rotary position. Further, the optical disk unit can further comprise a circumferential-direction position sensor for detecting a circumferential position on the optical disk, and a radial-direction position sensor for detecting a radial position of the optical pickup on the optical disk; wherein the control circuit can perform a control operation for modulating a laser beam emitted from the optical pickup, in accordance with the position detected by the circumferential-direction position sensor and the radial-direction position sensor and with image data to be formed on a label surface of the optical disk, such as characters or graphic images. The positional information about image data can be expressed as coordinate data consisting of a combination of a circumferential position on an optical disk and a radial position on an optical disk. The circumferential-direction position sensor can comprise a frequency generator which is rotated by the rotary drive device to generate a signal of frequency corresponding to rotation, and a multiplier for multiplying the frequency of a signal generated by the frequency generator. The relative movement mechanism can comprise a radial-direction feed drive device for moving the optical pickup in a radial direction of the optical disk, and a track-tangential-direction feed drive device for moving the optical pickup in a direction which is perpendicular to the radial direction of movement and is tangent to a track of the optical disk; wherein the control circuit can control relative movement between the optical disk and the laser beam by controlling the radial-direction position sensor and the track-tangential-direction feed drive device while the turntable is left in a stationary state. The optical disk unit further comprises a circumferential-direction position sensor for detecting a circumferential position on the optical disk, and a track-tangential-direction position sensor for detecting a position which is orthogonal to the radial direction of movement and is tangent to a track of the optical disk; wherein the laser beam emitted from the optical pickup can be controlled in accordance with the position detected by the circumferential-direction position sensor and the track-tangential-direction position sensor and with image data to be formed on a label surface of the optical disk, such as characters or graphic images. The positional information about image data can be expressed as coordinate data consisting of a combination of a radial position on an optical disk and a position along a direction which is perpendicular to the radial direction of movement of the optical disk and is tangent to a track of the optical disk. Further, the control circuit performs relative movement between the optical disk and the laser beam by turning off a tracking servo and turning on/off a focus servo. The control circuit can perform a control operation for vibrating and driving a tracking actuator of the optical pickup while performing relative movement between the optical disk and the laser beam. The optical disk unit according to the present invention can be embodied in, for example, an optical disk unit for a single-side CD-type optical disk, such as a CD-R (CD-R recordable) and CD-RW (CD rewritable); or an optical disk recording device for an optical disk formed by laminating two substrates; for example, a DVD-type optical disk such as a DVD-R (DVD recordable) or DVD-RW (DVD rewritable).
The present invention also provides an optical disk comprising a visible light characteristic changing layer which changes a visible characteristic of a visible light by exposure to a laser beam having entered from a label surface and which is formed in a location capable of being viewed from the part of the label surface. The optical disk enables implementation of the label surface image formation method according to the present invention. Since the visible light characteristic changing layer is formed integrally on an optical disk, occurrence of vibration caused by mass eccentricity during high-speed rotation, and occurrence of failure caused by exfoliation of a label within a drive can be prevented, as compared with a label pasting method.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial cross section showing an embodiment or an optical disk according to the present invention;
As shown in FIG. 2, an intermediate layer 24 can be provided between the reflection layer 16 and the visible light characteristic changing layer 18. The intermediate layer 24 can improve adhesion between a reflection layer and a visible light characteristic changing layer, control heat conductivity contributing to changes in a characteristic of visible light, and control heat insulating property to protect data recorded on a recording surface of an optical disk. The reflection layer and the intermediate layer can be joined directly together, and the intermediate layer and the visible light characteristic changing layer can be joined directly together. As shown in FIG. 3, in place of the intermediate layer 24, the visible light characteristic changing layer 18 is formed into a structure having a plurality of minute dots (e.g., each assuming a circular shape having a diameter of tens of micrometers or a non-circular shape of similar size), through use of, e.g., a film transfer technique. Alternatively, in place of a plurality or minute pores, the visible light characteristic changing layer 18 can be formed into a porous structure having a plurality of minute pores 26. In a case where the visible light characteristic changing layer 18 is formed into the structure having dots such as shown in FIG. 3, the reflection layer 16 and the protective layer 20 are joined together directly outside the dots. In a case where the visible light characteristic changing layer 18 is formed into the structure having pores such as that shown in FIG. 4, the reflection layer 16 and the protective layer 20 are directly joined together within the pores. As a result, there can be achieved good adhesion, and heat insulation control can be performed for the purpose of attaining the object. Even when the visible light characteristic changing layer 18 is translucence, the reflection layer 16 can be partially seen from the part of the label surface 22, through an area where no visible light characteristic changing layer 18 is present and at which the reflection layer 16 and the protective layer 20 are joined together directly. At the time of printing of the label surface 22, focusing on the reflection layer 16 can be achieved readily. The visible light characteristic changing layer 18 can be made into a structure having concentric fringes or linear stripes.
FIG. 5 is a partial cross section (the thickness of each layer differs from that or an actual layer, and a guide groove is omitted from the drawing) showing another embodiment of the optical disk according to the present invention. This embodiment is an example in which the present invention is applied to a CD-RW disk. As to an optical disk 28, a dielectric layer 32, a recording layer 34, a dielectric layer 36, a reflection layer 38, a visible light characteristic changing layer 40, and a protective layer 42 are sequentially formed on a single of a transparent substrate 30 made of, for example, polycarbonate so as to constitute the optical disk 28. The optical disk 28 is identical with an ordinary CD-RW disk, except for provision of the visible light characteristic changing layer 40. The visible light characteristic changing layer 40 can be seen from a label surface 44 side through a transparent protective layer 42. The visible light characteristic changing layer 40 can be constituted in the same manner as in the visible light characteristic changing layer 18 shown in FIG. 1. As in the case of the optical disk 10 shown in FIG. 2, an intermediate layer can be interposed between the reflection layer 38 and the protective layer 42 for the purpose set forth. Further, the visible light characteristic changing layer 40 can be formed into a structure having a plurality of minute spots, as in the visible light characteristic changing layer 18 shown in FIG. 3. Alternatively, the visible light characteristic changing layer 40 can be formed into a porous structure having a plurality of minute pores, as shown in FIG. 4. As another alternative, the visible light characteristic changing layer 40 can be formed into a structure having concentric fringes or a structure having linear stripes.
FIG. 17 shows a partial cross section (the thickness of each layer differs from that of an actual layers, and a guide groove is omitted from the drawing) showing another embodiment of the optical disk according to the present invention. In this embodiment, a reflection layer for data recording and a reflection layer for imaging a label are separately provided in the optical disk. That is, a second reflection layer 35 is formed between an intermediate layer 35 and a buffer layer 37 (separation layer) as shown in FIG. 17. The second reflection layer 35 is made of metal or derivative reflection material. Remain portion of the optical disk shown in FIG. 17 is identical to the optical disk shown in FIG. 5. In this embodiment, since the reflection layers 35 and 38 are separately provided in the optical disc, mutual influence of recording data and printing label to the visible light characteristic changing layer 40 and the recording layer 34 is reduced. Therefore, the influence on formation of an image on the label surface is certainly eliminated.
FIG. 18 shows a partial cross section (thickness of each layer differs from that of an actual layers, and a guide groove is omitted from the drawing) showing another embodiment of the optical disk according to the present invention. This embodiment is an example in which the present invention is applied to an optical disk comprising two substrates adhered with other, such as a DVD (Digital video Disk). The optical disk in this embodiment is constituted as follows: a dielectric layer 32, a recording layer 34, a dielectric layer 36 and a first reflection layer 38 are sequentially formed on a first transparent substrates a second reflection layer 35 made of metal or derivative reflection material, a translucence intermediate layer 39 (a light scattering layer), a visible light characteristic changing layer 40 and a protective layer 42 are sequentially formed on a second substrate 33; and the second substrate 33 is built on the first substrate 30 through a laminating adhesive layer 31 as shown in FIG. 18. In case of DVD, each substrate has a thickness of 0.6 mm and is laminated each other, so that sum of thickness including a recording layer is 1.2 mm.
The laser driver 82 drives a laser diode of the optical pickup 66 to emit a laser beam onto the optical disk 50 in accordance with the instruction output from the system control circuit 62, thereby executing recording/reproduction of data or printing a label. At the time of recording of data, the laser diode outputs a laser beam or recording power modulated by a recording signal. At the time of reproduction of data, the laser diode outputs a laser beam of fixed reproduction power. At the time of printing label, the laser diode outputs a laser beam modulated based on image data pertaining to characters or graphic images to be printed (i.e., a laser beam has high power so as to cause changes in the visible light characteristic changing layer in an area to be printed and a laser beam has low power so as not to cause changes in the visible light characteristic changing layer in an area not to be printed). At the time of printing a label, the host computer 46 transmits, to a CD-R/RW drive 48, image data, which edited by a user and to be printed, pertaining to characters or graphic images. The image data is constituted by data (e.g., data which specify a print segment represented by an angle θ for each radial position �r� at a predetermined pitch Δr) represented by coordinates (r, θ), the coordinates corresponding to a combination of a radial position �r� of an optical disk (a distance from a rotation center) and a circumferential position θ (a circumferential angle relative to an appropriate reference position).
(1) The optical disk 50 is set on the turntable 54 while being inverted in case of recording data or reproducing, i.e. the optical disk 50 is set so as to face the surface or the optical disk 50, which the label is to be printed, to the optical pick up 66.
(7) The focus servo circuit 76 is turned on in accordance with the instruction output from the system control circuit 62. Then, the focus servo circuit 76 executes focus servo operation so that the laser beam 67 form the minimum spot on the reflection layer. Here, the tracking servo circuit 78 remains off, and no tracking servo operation in performed.
Scanning is not performed at radial positions where there is no print area, and, the optical pickup 66 moves to a radial position where the next print area is present by passing through the radial position having no print area, and printing is performed. If the pitch Δr is large, an image which is originally to be printed without interruption in the radial direction is printed with gaps, as shown in FIG. 9. In contrast, if the pitch Δr is made small, gaps can be made unnoticeable. However, the number of rotations required for printing data on the entire label surface is increased, and printing involves consumption of time. For this reason, the CD-R/RW drive 48 drives a tracking actuator with a vibration signal (e.g., a sinusoidal signal or triangular signal) generated by the vibration signal generation circuit 80 during a printing operation, thereby vibrating the objective lens in the radial direction of the optical disk 50. As shown in FIG. 10, the laser beam is vibrated in the radial direction of the optical disk 50, thereby enabling a printing operation without gaps (or with occurrence of small gaps) even at a comparatively large pitch Δr. The frequency or the vibration signal can be set to, e.g., several kilohertz or thereabouts. Further, the pitch Δr can be set to, e.g., 50 to 100 μm or thereabouts.
The track-tangential-direction feed mechanism can move the spindle motor 88 instead of moving the optical pickup 90. In this case, a feed screw 117 and a feed motor 119 for moving the spindle motor 88 in the same direction are provided in place of the feed screw 101 and the feed motor 103 for moving the optical pickup 90 in the direction tangent to a track. FIGS. 15A and 15A show a layout of the feed mechanism in such a case (neither the feed motor 119 nor the feed screw 117 is shown) as an example. Slide bars 121 are provided in and fixed to a mechanical base of the CD-R/RW drive 84 in parallel with the plane of the optical disk 50. A spindle motor 88 is slidably supported by the slide bars 121. The spindle motor 88 is moved along the slide bars 121 by a feed motor 119 and a feed screw 117 (see FIG. 13). Slide bars 123 are mounted on and fixed to a mechanical base or ho CD-R/RW drive 84. The optical pickup 90 is slidably supported by the slide bars 123 and is moved along the slide bars 123 by the feed motor 94 and the feed screw 92 (shown in FIG. 13). At the time of printing operation, feed mechanisms feeding in two directions are driven. At the time of recording/reproduction of data, only the track-radial-direction feed mechanism is driven. The track-tangential-direction feed mechanism is stopped in a neutral position thereof (i.e., the position in which an objective lens 90 a of the optical pickup 90 is moved in the radial direction of a disk by driving the track-radial-direction feed mechanism).
In FIG. 13, in accordance with an instruction output from the system control circuit 105, a focus servo circuit 125 actuates a focus actuator of the optical pickup 90 on the basis of a focus error signal, thus performing focus control operation. At the time of printing a label, the focus servo circuit 125 is turned on. At the time of recording or reproduction of data, a tracking servo circuit 127 actuates a tracking actuator or the optical pickup 90 on the basis of a tracking error signal in accordance with the instruction output from the system control circuit 105, thus performing tracking control operation. At the time of printing a label, the tracking servo circuit 127 is turned off. At the time of printing a label, the vibration signal generation circuit 129 generates a predetermined vibration signal in accordance with the instruction output from the system control circuit 105, and supplies the vibration signal to the tracking actuator. Accordingly, an object lens of the optical pickup 90 is vibrated in the radial direction of the optical disk to bridge a gap between the areas circularly scanned by a laser beam, as a result of which there is obtained a print product having no gaps.
In accordance with the instruction output from the system control circuit 105, a laser driver 131 drives a laser diode of the optical pickup 66 to emit a laser beam onto the optical disk 50, thereby performing recording/reproduction of data or printing or a label surface. At the time of recording of data, the laser diode outputs a laser beam of recording power modulated by a recording signal, by driving action of the laser driver 131. At the time of reproduction of data, the laser diode outputs a laser beam whose recording power has a fixed predetermined reproducing power. At the time of printing label, the laser diode outputs a laser beam modulated with image data pertaining to characters or graphic images to be printed (i.e., a laser beam has high power to cause changes in the visible light characteristic changing layer in an area to be printed and a laser has low power so as not to cause changes in the visible light characteristic changing layer in an area not to be printed). At the time of printing a label, a host computer 133 transmits, to the CD-R/RW drive 84, image data pertaining to characters or graphic images to be edited by the user and to be printed. The image data are constituted by dot-matrix data (e.g., data which specify a print segment in the direction tangent to a track represented by �t,� for each radial position �r� at a predetermined pitch Δr) represented by coordinates (r, t), the coordinates corresponding to a combination of a radial position �r� of an optical disk, which is a distance from an appropriate reference position (e.g., rotation center) in the radial direction of the disk, and a position �t� in the direction tangent to a track, which is a distance from the appropriate reference position in the direction tangent to a track.
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G11B7/0037, G11B23/40, G11B7/26, G11B7/0045, B41J2/47, G11B7/085, B41J3/407, G11B7/2403, G11B7/24094Cooperative ClassificationG11B23/40, B41J3/4071, B41J2/47, G11B7/08505, G11B7/0037, B41J19/16, G11B7/2403, G11B7/24094European ClassificationG11B7/0037, G11B23/40, B41J2/47, B41J3/407C, G11B7/24, B41J19/16Legal EventsDateCodeEventDescriptionJun 11, 2014FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google