WO2012043016A1 - Dispositif et procédé de formation d'image - Google Patents

Dispositif et procédé de formation d'image Download PDF

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Publication number
WO2012043016A1
WO2012043016A1 PCT/JP2011/066043 JP2011066043W WO2012043016A1 WO 2012043016 A1 WO2012043016 A1 WO 2012043016A1 JP 2011066043 W JP2011066043 W JP 2011066043W WO 2012043016 A1 WO2012043016 A1 WO 2012043016A1
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WO
WIPO (PCT)
Prior art keywords
detection
lenticular
head
sheet
lens
Prior art date
Application number
PCT/JP2011/066043
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English (en)
Japanese (ja)
Inventor
和也 真弓
吉田　直樹
Original Assignee
富士フイルム株式会社
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Filing date
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Application filed by 富士フイルム株式会社 filed Critical 富士フイルム株式会社
Publication of WO2012043016A1 publication Critical patent/WO2012043016A1/fr

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B35/00—Stereoscopic photography
    • G03B35/14—Printing apparatus specially adapted for conversion between different types of record
    • 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
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2132—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding
    • B41J2/2146—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding for line print heads
    • 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • B41J25/316—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with tilting motion mechanisms relative to paper surface
    • 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
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects

Definitions

  • the present invention relates to an image forming apparatus and an image forming method capable of forming a high-quality stereoscopic image by matching the longitudinal direction of a lenticular lens with the longitudinal direction of a linear image constituting a stereoscopic image.
  • an image forming apparatus that forms a stereoscopic image by printing a plurality of viewpoint images on a lenticular sheet in which a plurality of substantially semi-cylindrical lenticular lenses are arranged. Specifically, a lenticular sheet is conveyed, and a linear image of each viewpoint image is printed for each lenticular lens using a line head on the back of the lenticular sheet. For example, when printing six viewpoint images, six linear images are printed for each lenticular lens.
  • Patent Document 1 discloses a configuration in which a test pattern is printed and then read by a photosensor, and a movement amount from the printing position to the reading position of the photosensor is detected.
  • Patent Document 2 discloses a configuration in which a relative position of a lenticular lens with respect to a head is detected by an optical sensor provided in the head.
  • Patent Document 3 discloses a configuration in which the inclination angle of a lenticular lens is calculated by reading a lenticular sheet and calculating the inclination of a valley of the lenticular lens (convex lens) with respect to a reference parallel line.
  • JP-A-8-137034 Japanese Patent Laid-Open No. 2003-21878 JP 2007-127521 A
  • Patent Document 1 In the configuration described in Patent Document 1, only the amount of movement from the printing position to the reading position of the photosensor is detected, and the tilt of the lenticular lens and the head cannot be accurately detected. In the configuration described in Patent Document 2, only the relative position of the lenticular lens with respect to the head is detected, and the tilt of the lenticular lens and the head cannot be accurately detected. With the configuration described in Patent Document 3, it is possible to detect the tilt angle of the lenticular lens, but if the tilt angle is large with respect to the lens pitch, erroneous detection of the tilt angle occurs. In addition, none of Patent Documents 1 to 3 describes correction for head tilt.
  • the present invention has been made in view of such circumstances, and provides an image forming apparatus and an image forming method capable of forming a high-quality stereoscopic image even when the lenticular lens and the head are inclined. Objective.
  • the present invention conveys a lenticular sheet formed with a plurality of lenticular lenses arranged along the sub-scanning direction and a detection line along the longitudinal direction of the lenticular lens in the sub-scanning direction.
  • a plurality of detection sensors including first and second detection sensors disposed on a reference line in a main scanning direction orthogonal to the sub-scanning direction, provided in a conveyance path for the lenticular sheet, and the lenticular sheet
  • the detection line of the lenticular lens is detected by the plurality of detection sensors, and an inclination angle of the lenticular lens with respect to the reference line is calculated based on detection signals of the plurality of detection sensors, and a conveyance path of the lenticular sheet Arranged along the longitudinal direction intersecting the sub-scanning direction, and the lenticular sheet of the lenticular sheet
  • an inclination correction control unit that matches the inclination angle of the lenticular lens with the inclination angle of the head. That is, by using the virtual line connecting the first detection sensor and the second detection sensor as a reference line, angle correction is performed so that the tilt angle of the lenticular lens coincides with the tilt angle of the head, whereby a plurality of lenticular lenses on the lenticular sheet are corrected.
  • a plurality of linear images can be recorded with high accuracy corresponding to each, and a highly accurate stereoscopic image can be formed.
  • the detection line of the lenticular lens is formed by coloring a groove between the lenticular lenses in a longitudinal direction of the lenticular lens
  • the lens inclination measurement unit includes the plurality of lens inclination measuring units. Based on the detection signal of the detection sensor, an inclination angle of the colored groove with respect to the reference line is calculated. That is, by detecting a detection line in which grooves (valleys) between lenticular lenses are colored in the longitudinal direction of the lenticular lens, the adjacent peaks are identical to those in the case of detecting a non-colored lenticular lens peak. It is possible to prevent erroneous detection of a mountain.
  • the detection line of the lenticular lens is formed by coloring a peak of the lenticular lens in a longitudinal direction of the lenticular lens
  • the lens inclination measuring unit is configured to detect the plurality of detections.
  • An inclination angle of the colored mountain with respect to the reference line is calculated based on a detection signal of the sensor. That is, by detecting a detection line in which the lenticular lens peak is colored in the longitudinal direction of the lenticular lens, the adjacent peak is the same peak as in the case of detecting a non-colored lenticular lens peak. It is possible to prevent erroneous detection.
  • the detection line of the lenticular lens is formed in a shape lacking a mountain of the lenticular lens
  • the lens inclination measurement unit is based on detection signals of the plurality of detection sensors. Then, an inclination angle of the detection line formed in a shape lacking the mountain with respect to the reference line is calculated. That is, by detecting a detection line formed with a shape (skip shape) lacking the lenticular lens ridge, the adjacent ridges are compared with the case where a non-colored lenticular lens ridge is detected. It is possible to prevent erroneous detection as being.
  • the lenticular lens in the sub-scanning direction is detected.
  • a lens position detector for detecting the reference position is provided. In other words, even if there is a detection line on the lenticular sheet, the reference position of the lenticular lens can be accurately detected.
  • a plurality of the detection lines of the lenticular lens are formed in total on the lenticular sheet with one or more lenticular lenses interposed therebetween, and the lens inclination measuring unit is The tilt of the lenticular lens is calculated based on the detection signal of the detection sensor that has detected a plurality of detection lines.
  • At least one detection line of the lenticular lens is formed near both the front end and the rear end from the center of the lenticular sheet in the sub-scanning direction. That is, the detection line can be reliably detected even if the top and bottom direction (front and rear) is reversed and conveyed in the conveyance direction (sub-scanning direction) of the lenticular sheet.
  • a holding unit that holds the lenticular sheet conveyed on the conveyance path by the conveyance unit is provided, and the inclination correction control unit makes the holding unit perpendicular to the conveyance surface of the lenticular sheet.
  • the tilt angle of the lenticular lens is changed by rotating it around a certain axis.
  • the detection line of the lenticular lens is formed in a non-holding region that is not held by the holding part of the lenticular sheet, and the plurality of detection sensors are connected to the non-holding region from the non-holding region. Detect the detection line.
  • the head tilt detection sheet is transported by the transport unit, and the head tilt angle with respect to the reference line is detected while the head tilt detection sheet is held by the holding unit.
  • a detection pattern printing control unit that prints a detection pattern on the detection sheet by the head, the detection pattern is detected by the plurality of detection sensors, and the reference is based on detection signals of the plurality of detection sensors.
  • a head inclination angle measuring unit that calculates an inclination angle of the detection pattern with respect to a line and stores the inclination angle in the storage unit as the inclination angle of the head.
  • a bending amount storage unit that stores a bending amount in the longitudinal direction of the head, and a bending distortion of the viewpoint image formed on the lenticular sheet due to the bending of the head are canceled.
  • an image correction unit that corrects the curvature of the viewpoint image in accordance with the amount of curvature stored in the storage unit.
  • detection for detecting an inclination angle of the head with respect to the reference line in a state where the detection sheet is conveyed by the conveyance unit and the detection sheet is held by the holding unit A detection pattern printing control unit that prints a pattern on the detection sheet by the head, and the inclination detection pattern is detected by the plurality of detection sensors, and the reference line is detected based on detection signals of the plurality of detection sensors.
  • a head tilt angle measurement unit that calculates the tilt angle of the detection pattern and stores the tilt angle in the storage unit as the tilt angle of the head, and detection of the plurality of detection sensors that detect the detection pattern of the detection sheet Based on the signal, the bending amount with respect to the longitudinal direction of the head is calculated and stored in the storage unit;
  • An image correction unit that corrects the curvature of the viewpoint image in accordance with the amount of bending stored in the storage unit so as to cancel the distortion of the viewpoint image formed on the lenticular sheet due to the curvature of the lens. It is characterized by having.
  • a detection sensor for detecting the bending amount is arranged at the center between the first detection sensor and the second detection sensor.
  • four or more detection sensors are arranged as the plurality of detection sensors.
  • the plurality of detection sensors are arranged such that at least one of the intervals of the plurality of detection sensors in the main scanning direction is different from any other interval.
  • the present invention provides a transport unit that transports in the sub-scanning direction a lenticular sheet in which a plurality of lenticular lenses arranged in the sub-scanning direction and a detection line along the longitudinal direction of the lenticular lens are formed,
  • a plurality of detection sensors including first and second detection sensors provided on a reference line in a main scanning direction orthogonal to the sub-scanning direction and provided in the lenticular sheet conveyance path;
  • a plurality of linear images corresponding to each of the plurality of lenticular lenses is arranged on a surface opposite to the surface on which the lenticular lens is formed of the lenticular sheet, which is arranged along a longitudinal direction intersecting the scanning direction.
  • An image forming apparatus comprising: a head that records a plurality of viewpoint images on the lenticular sheet by recording; and a storage unit. Storing the inclination angle of the head in the longitudinal direction with respect to a line in the storage unit, detecting the detection lines of the lenticular sheet by the plurality of detection sensors, and based on detection signals of the plurality of detection sensors Calculating the tilt angle of the lenticular lens with respect to the reference line, and the tilt angle of the lenticular lens based on the calculated tilt angle of the lenticular lens and the tilt angle of the head stored in the storage unit; There is provided an image forming method for executing a step of matching the tilt angle of the head and a step of recording the plurality of viewpoint images by the head on the back surface of the lenticular sheet.
  • a high-quality stereoscopic image can be formed by matching the longitudinal direction of the lenticular lens with the longitudinal direction of the linear image.
  • FIG. 1 Schematic of an image forming apparatus to which the present invention is applied
  • Perspective view of lenticular sheet Top view showing an example of the detection sensor and its periphery Side view of angle detector Illustration of detection signal
  • the perspective view which shows a clamp unit and its periphery 1 is a block diagram showing the configuration of a printer control system in a first embodiment.
  • the flowchart which shows the flow of the example of an initial measurement process in 1st Embodiment.
  • Explanatory drawing which shows the state which printed the detection pattern for head inclination angle detection
  • Explanatory drawing which shows a mode that the detection pattern for head inclination angle detection is detected.
  • the flowchart which shows the flow of the example of the stereo image formation process in 1st Embodiment.
  • Its side view Sectional drawing which shows a mode that the detection line for lens inclination angle detection is detected A perspective view showing a state before the clamper is rotated.
  • the perspective view which shows a mode that the detection line LL of the lenticular sheet was made to correspond with the reference line Lb by clamper rotation.
  • Explanatory drawing which shows the state which rotated the head and made the inclination angle of a lenticular lens and the inclination angle of a head correspond.
  • a perspective view showing an example of a lenticular sheet in which a plurality of detection lines are formed Cross section
  • the perspective view which shows an example of the detection line formed in the shape which lacked the peak of the lenticular lens Sectional drawing which shows an example of the detection line formed by coloring the mountain of a lenticular lens Explanatory drawing which shows a mode that the lenticular lens adjacent to a detection line is detected.
  • the top view which shows an example of the detection sensor in 2nd Embodiment, and its periphery
  • the block diagram which shows the structure of the control system of the printer in 2nd Embodiment.
  • the flowchart which shows the flow of the example of an initial measurement process in 2nd Embodiment.
  • Explanatory drawing which shows the state which printed the detection pattern for detecting a head inclination and the curvature amount.
  • Explanatory drawing which shows a mode that the detection pattern is detecting with the detection sensor
  • Explanatory drawing used for explanation of measurement of head bending amount The flowchart which shows the flow of the example of the stereo image formation process in 2nd Embodiment.
  • FIG. 1 is a schematic configuration diagram showing a printer 2 to which the present invention is applied.
  • the printer 2 records a parallax image on the back surface of the lenticular sheet 3.
  • the lenticular sheet 3 has a large number of substantially semi-cylindrical lenticular lenses 4 (hereinafter sometimes simply referred to as “lenses”) arranged on the surface, and the back surface is flat.
  • the lenticular lens 4 is formed of a cylindrical lens and has a surface shape that forms a part of a cylinder.
  • the “lenticular lens” in the present invention is not limited to the shape shown in FIG. 2, and includes other cylindrical lenses.
  • a large number of lenses 4 are formed on the surface of the lenticular sheet 3 along the sub-scanning direction y (conveying direction), and the lenticular sheet 3 is in a state where the longitudinal direction of the lens 4 is substantially parallel to the main scanning direction x. Be transported.
  • an image area 5 is virtually divided for each lens 4, and one image area 5 corresponds to one lens 4.
  • Each image region 5 is virtually divided into a plurality of rows of minute regions 5a to 5f in the arrangement direction of the lens 4 corresponding to the number of viewpoints (six viewpoints in this example) for displaying a stereoscopic image, and parallax images
  • a linear image obtained by dividing the line is recorded in each of the plurality of minute areas 5a to 5f. For example, a first viewpoint parallax image is printed in the first minute region 5a.
  • the printer 2 is provided with a conveyance path 12 through which the lenticular sheet 3 supplied from the conveyance port 11 is conveyed.
  • a feed roller pair 15, a head 16 and a platen roller 17, an inclination angle detection unit 18, and a clamp unit 19 are arranged in the transport path 12 in order from the upstream side in the transport direction.
  • the clamp unit 19 is a clamper that switches between a clamper 23 as a holding unit that releasably clamps (holds) the tip of the lenticular sheet 3, and a closed state in which the lenticular sheet 3 is clamped and an open state in which the lenticular sheet 3 is unclamped.
  • An opening / closing mechanism 24 and a clamper driving mechanism 25 that reciprocates the clamper 23 along the transport path 12 are configured.
  • the clamper 23 is moved by the clamper driving mechanism 25 between a clamp position for clamping and releasing the tip of the lenticular sheet 3 fed by the feed roller pair 15 and a terminal position downstream of the clamp position.
  • the lenticular sheet 3 clamped by the clamper 23 reciprocates in the sub-scanning direction orthogonal to the main scanning direction. Further, the clamper driving mechanism 25 rotates the clamper 23 around an axis perpendicular to the transport surface of the transport path 12. That is, the lenticular sheet 3 can be rotated at an arbitrary angle around an axis perpendicular to the conveyance surface.
  • the transport path 12 near the upstream side of the platen roller 17 is provided with a return transport path 12a that extends obliquely downward toward the upstream side.
  • a discharge port (not shown) for discharging the recorded lenticular sheet 3 outside the printer 2 is provided at the tip of the return conveyance path 12a.
  • the head 16 and the platen roller 17 are disposed so as to sandwich the conveyance path 12.
  • an array of recording elements 16a in which a large number of heating elements are arranged in a line in a plurality of rows in the main scanning direction is formed below the head 16.
  • the head 16 moves between a pressing position where the recording film is pressed against the back surface of the lenticular sheet 3 on the platen roller 17 and a retracted position where the recording film is retracted upward from the pressing position.
  • an image receiving layer film 27, an ink film 28, and a back layer film 29 are attached to a film exchange mechanism 30.
  • the image receiving layer film 27 is heated by the head 16 while being superimposed on the back surface of the lenticular sheet 3, the transparent image receiving layer to which the color ink from the ink film 28 is attached is transferred to the back surface of the lenticular sheet 3.
  • the ink film 28 is a sublimation type ink film, and when heated by the head 16 in a state of being superimposed on the image receiving layer on the back surface of the lenticular sheet 3, yellow, magenta, and cyan inks are sublimated to adhere to the image receiving layer. .
  • the back layer film 29 transfers the white back layer onto the image when heated by the head 16 in a state of being superimposed on the image recorded on the lenticular sheet 3.
  • the head driving unit 32 drives the head 16.
  • the head driving unit 32 simultaneously generates heat generation amounts necessary for the transfer in the respective heating elements, and when recording an image using the ink film 28, the head driving unit 32 is based on the parallax image data. Each heating element generates heat.
  • the tilt angle detector 18 optically detects the tilt angle ⁇ L of the lens 4 of the lenticular sheet 3 conveyed by the clamp unit 19.
  • the tilt angle ⁇ L of the lens 4 is an angle formed by the longitudinal direction of the lens 4 and the main scanning direction.
  • the tilt angle detection unit 18 includes a first detection sensor 34 and a second detection sensor 36.
  • the first detection sensor 34 (S1) is disposed at a position facing one side end of the lenticular sheet 3.
  • the second detection sensor 36 (S2) is disposed at a position facing the other side end of the lenticular sheet 3.
  • Reference numeral L12 indicates a distance between the first detection sensor 34 (S1) and the second detection sensor 36 (S2).
  • the head 16 has a plurality of recording elements 16 a arranged along the longitudinal direction intersecting the sub-scanning direction in the conveyance path of the lenticular sheet 3 and arranged along the longitudinal direction of the head 16.
  • the head 16 records a plurality of linear images corresponding to each of the plurality of lenticular lenses 4 on the back surface of the lenticular sheet 3 opposite to the surface on which the lenticular lens 4 is formed. Record multiple viewpoint images.
  • the longitudinal direction of the head 16 is parallel to the main scanning direction. However, in practice, the head 16 may be inclined with respect to the main scanning direction. Such correction is necessary.
  • the first detection sensor 34 and the second detection sensor 36 are provided in the conveyance path of the lenticular sheet 3 and are arranged on the reference line Lb in the main scanning direction orthogonal to the sub-scanning direction. Based on the detection signals output from the plurality of detection sensors 34 and 36, the tilt angle of the lenticular lens 4 can be obtained.
  • each of the detection sensors 34 and 36 includes a light emitting diode (hereinafter referred to as “LED”) 38 and a photo sensor 39 that are arranged to face each other with the conveyance surface of the lenticular sheet 3 interposed therebetween.
  • a slit plate 40 is disposed between the photo sensor 39 and the conveyance surface of the lenticular sheet 3.
  • the slit plate 40 is formed with a slit hole 40a set to a width through which almost one light of the lens 4 passes.
  • the detection range is limited by the slit hole 40 a and is received by the photosensor 39.
  • the photo sensor 39 outputs a detection signal corresponding to the amount of received light.
  • the amount of light received by the photosensor 39 changes according to the position of the lens 4 with respect to each of the detection sensors 34 and 36, and the magnitude of the detection signal also changes.
  • the detection signal of this example increases to a maximum until the apex of the lens 4 faces the detection sensor 34, 36 until the boundary between the lenses 4 faces, then decreases, and the boundary between the lenses 4 decreases. When facing each other, it starts to increase again.
  • FIG. 5 is a perspective view showing the clamp unit 19 and its surroundings.
  • the clamper 23 includes a fixed plate 42 and a movable plate 43.
  • the fixed plate 42 is a flat plate whose length in the longitudinal direction is larger than the width of the lenticular sheet 3, and is arranged in parallel with the transport surface.
  • the movable plate 43 rotates between a holding position for holding the lenticular sheet 3 between the movable plate 43 and a holding release position for releasing the holding.
  • a spring (not shown) is disposed between the fixed plate 41 and the movable plate 43, and the movable plate 43 is urged toward the holding position by this spring.
  • the clamper opening / closing mechanism 24 includes a cam shaft 45 that rotates the movable plate 43 and a clamp release motor 46 that rotates the cam shaft 45.
  • the cam shaft 45 is disposed in the vicinity of the clamper 23 at the clamp position. By rotating the cam shaft 45 by the clamp release motor 46 and displacing the movable plate 43 between the holding position and the holding release position by the cam 45a attached to the cam shaft 45, the clamper 23 is opened and closed. Switch between states.
  • the clamper driving mechanism 25 includes a left motor 49 and a right motor 50, a left pulley 51 and a right pulley 52 attached to a rotating shaft, a left belt 53 hung on the left motor 49 and the left pulley 51, and a right motor. 50 and a right belt 54 hung on the right pulley 52.
  • Both ends of the clamper 23 are attached to the left and right belts 53 and 54 so as to be rotatable around an axis perpendicular to the conveying surface.
  • the left and right belts 53 and 54 move the clamper 23 in the sub-scanning direction.
  • the left motor 49 and the right motor 50 rotate in opposite directions, or when only one of them rotates, the left and right belts 53 and 54 rotate the clamper 23 around an axis perpendicular to the conveyance surface.
  • the clamper drive mechanism 25 includes a left guide rail 55 and a right guide rail 56 that guide the clamper 23 in the sub-scanning direction.
  • a left skew regulation guide 57 and a right skew regulation guide 58 are disposed inside the left and right guide rails 55 and 56.
  • the left and right skew regulation guides 57 and 58 regulate the skew angle of the lenticular sheet 3 fed from the feed roller pair 15 to the clamp unit 19 to be a predetermined angle or less.
  • a conveying means for conveying the lenticular sheet 3 in the sub-scanning direction is constituted by the feeding roller pair 15, the clamp unit 19, the left and right belts 53 and 54, and the like.
  • FIG. 6 is a block diagram showing the configuration of the control system of the printer 2 in the first embodiment.
  • the elements shown in FIGS. 1 to 5 are given the same reference numerals.
  • the CPU 60 controls each part of the printer 2 in an integrated manner.
  • the memory 61 stores a program and data for controlling the printer 2.
  • the motor driver 62 rotates and stops the feed roller pair 15 by the motor 21 according to the control of the CPU 60. Further, the motor driver 62 rotates the left and right belts 53 and 54 according to the control of the CPU 60.
  • the head retracting mechanism 64 moves the head 16 to the press contact position or the retracted position under the control of the CPU 60.
  • the tip detection sensor 65 (see FIG. 5) is disposed upstream of the clamp position, and outputs a tip detection signal to the CPU 60 when it detects passage of the tip of the lenticular sheet 3.
  • the head drive control unit 68 controls the drive of the head 16 by the head drive unit 32.
  • the clamper drive control unit 69 switches between a closed state and an open state of the clamper 23 by the clamper opening / closing mechanism 24. Further, the clamper drive control unit 69 controls the movement of the clamper 23 in the sub-scanning direction and the rotation of the clamper 23 by the clamper drive mechanism 25.
  • the clamper drive control unit 69 of this example controls holding and releasing of the sheet such as the lenticular sheet 3 by the clamper opening / closing mechanism 24. Further, the clamper drive control unit 69 of this example adjusts the tilt angle of the lens 4 of the lenticular sheet 3 by the clamper drive mechanism 25.
  • the tilt correction control unit 70 performs tilt correction control by rotating the clamper 23 by the clamper drive control unit 69. Details of the tilt correction control will be described later.
  • the detection pattern printing control unit 72 conveys the transparent sheet 82 by the feeding roller pair 15 and the like, abuts against the abutting surface 23 a of the clamper 23, and clamps the transparent sheet 82 by the clamper 23.
  • the detection pattern 83 for detecting the tilt angle of the head 16 is printed on the transparent sheet 82 by the head 16.
  • the head inclination measuring unit 73 detects the detection pattern 83 of the transparent sheet 82 by the first detection sensor S1 and the second detection sensor S2, as shown in FIG. 9, and detects the first detection sensor S1 and the second detection sensor S2. Based on the signal, the inclination angle ⁇ p of the detection pattern 83 with respect to the reference line Lb (main scanning direction x) connecting the first detection sensor S1 and the second detection sensor S2 is calculated, and the inclination angle ⁇ p is calculated as the inclination angle of the head 16. It is stored in the memory 61 as ⁇ h.
  • the lens inclination measuring unit 74 detects the detection line (LL in FIG. 11A) of the lenticular sheet 3 by the first detection sensor S1 and the second detection sensor S2 as shown in FIG. 12, and the first detection sensor S1 and the second detection sensor 2 are detected. Based on the detection signal of the sensor S2, an inclination angle in the longitudinal direction of the lenticular lens 4 with respect to a reference line (Lb in FIG. 8) connecting the first detection sensor S1 and the second detection sensor S2 is calculated.
  • the lens position detection unit 75 detects a peak 4b of the lenticular lens 4 adjacent to the detection line LL among the plurality of lenticular lenses 4 based on the detection signals of the detection sensors S1 and S2, as shown in FIG. The reference position of the lenticular lens 4 in the sub-scanning direction is detected.
  • the aforementioned tilt correction control unit 70 executes various tilt corrections based on the measurement results of the head tilt measuring unit 73 and the lens tilt measuring unit 74.
  • the tilt correction control unit 70 of this example is based on the tilt angle of the lenticular lens 4 calculated by the lens tilt measuring unit 74 and the head tilt angle calculated by the head tilt measuring unit 73 and stored in the memory 61. Then, tilt correction control is performed to match the tilt angle of the lenticular lens 4 with respect to the reference line Lb (main scanning direction) and the tilt angle of the head 16.
  • the detection pattern printing control unit 72 conveys the transparent sheet 82 (head inclination detection sheet), abuts against the abutting surface 23 a of the clamper 23, and the transparent sheet 82 is clamped by the clamper 23.
  • control is performed such that the detection pattern 83 for detecting the tilt angle ⁇ h of the head 16 with respect to the reference line Lb is printed on the transparent sheet 82 by the head 16.
  • the data converter 76 reads out the two viewpoint parallax images from the memory 61 and converts them into multi-viewpoint (for example, six viewpoints) parallax images.
  • the stereoscopic image recording control unit 77 drives the head 16 with the multi-viewpoint parallax image generated by the data conversion unit 76 via the head drive control unit 68 and the head drive unit 32, and the head 16 is placed behind the lenticular sheet 3. Thus, a stereoscopic image (a multi-view parallax image) is recorded.
  • FIG. 7 is a flowchart showing an exemplary flow of the initial measurement process in the first embodiment. This process is executed by the CPU 60 according to a program.
  • a virtual line Lb connecting the first detection sensor S1 and the second detection sensor S2 is a reference line along the main scanning direction x.
  • the origin information of the clamper 23 is held in the memory 61. Based on the origin information, the abutting surface 23a of the clamper 23 can be set parallel to the reference line Lb. It is assumed that the longitudinal direction of the head 16 is not parallel to the reference line Lb. Therefore, it is necessary to correct the inclination angle of the head 16 in the longitudinal direction.
  • the detection pattern printing control unit 72 conveys an unprinted transparent sheet 82 by the feeding roller pair 15 to abut against the abutting surface 23 a of the clamper 23, and the transparent sheet 82 by the clamper 23. Is detected (step S11), and the detection pattern 83 for detecting the tilt angle of the head 16 is moved to the transparent sheet 82 by the head 16 while the transparent sheet 82 is moved in the sub-scanning direction y by driving the belts 53 and 54. Printing is performed (step S12).
  • the head inclination measuring unit 73 drives the belts 53 and 54 to move the transparent sheet 82 in the sub-scanning direction in a state where the transparent sheet 82 printed with the detection pattern 83 is clamped by the clamper 23. While moving at y, the detection pattern 83 of the transparent sheet 82 is detected by the first detection sensor S1 and the second detection sensor S2 (step S13).
  • the head inclination measuring unit 73 is configured to use a reference line Lb (main scanning direction x) connecting the first detection sensor S1 and the second detection sensor S2 based on the detection signals of the first detection sensor S1 and the second detection sensor S2.
  • the calculated tilt angle ⁇ p is stored in the memory 61 as the tilt angle ⁇ h of the head 16 with respect to the reference line Lb (step S14).
  • the distance between the first detection sensor S1 and the second detection sensor S2 is L12
  • the detection position deviation amount of the detection pattern 83 between the first detection sensor S1 and the second detection sensor S2 is DH.
  • FIG. 10 is a flowchart showing a flow of an example of the stereoscopic image forming process in the first embodiment. This process is executed by the CPU 60 according to a program.
  • the tilt angle ⁇ h of the head 16 is acquired from the memory 61 (step S21).
  • Step S22 the lenticular sheet 3 shown in the perspective view of FIG. 11A and the side view of FIG. 11B is conveyed by the pair of feeding rollers 15 to abut against the abutting surface 23a of the clamper 23, and the lenticular sheet 3 is clamped by the clamper 23.
  • the lens inclination measuring unit 74 drives the belts 53 and 54 in the sub-scanning direction with the clamper 23 clamping the transparent sheet 82 on which the detection pattern 83 is printed. While moving at y, the detection line LL of the lenticular sheet 3 is detected by the first detection sensor S1 and the second detection sensor S2 (step S23).
  • FIG. 13A shows the lenticular sheet 3 before tilt correction.
  • the lens tilt measurement unit 74 is configured to use a reference line Lb (main scanning direction x) connecting the first detection sensor S1 and the second detection sensor S2 based on the detection signals of the first detection sensor S1 and the second detection sensor S2.
  • the inclination angle ⁇ L of the detection line LL with respect to () is calculated, and the calculated inclination angle ⁇ L is stored in the memory 61 (step S24).
  • the tilt correction control unit 70 rotates the clamper 23 by the tilt angle ⁇ L so that the detection line LL coincides with the reference line Lb by the clamper driving mechanism 25 (step S25).
  • the tilt correction control unit 70 rotates the clamper 23 by the tilt angle ⁇ h by the clamper driving mechanism 25 (step S26).
  • a stereoscopic image (a plurality of viewpoint images) is formed on the lenticular sheet 3 (step S27).
  • the lenticular sheet 3 on which a plurality of viewpoint images are recorded as a stereoscopic image is discharged (step S28).
  • the tilt correction control unit 70 calculates the tilt angle ⁇ L with respect to the reference line Lb of the lenticular lens 4 calculated by the lens tilt measuring unit 74 and the tilt angle ⁇ h with respect to the reference line Lb in the longitudinal direction Lh of the head 16 stored in the memory 61. Based on the above, tilt correction is performed so that the tilt angle of the lenticular lens 4 with respect to the reference line Lb coincides with the tilt angle ⁇ h with respect to the reference line Lb in the longitudinal direction Lh of the head 16.
  • the detection line LL in the lenticular sheet 3 shown in the perspective view of FIG. 15A and the side view of FIG. 15B is formed by coloring the groove 4 a between the lenticular lenses 4 in the longitudinal direction of the lenticular lens 4.
  • the lens inclination measurement unit 74 calculates the inclination angle in the longitudinal direction of the groove 4a with respect to the reference line Lb based on the detection signals of the detection sensors S1 and S2.
  • the detection lines LL are formed in total (two in this example) on the lenticular sheet 3 with a plurality of lenticular lenses 4 interposed therebetween.
  • one or more detection lines LL are formed near both the front end and the rear end of the lenticular sheet 3 in the sub-scanning direction. Further, the detection line LL of this example is formed in a non-clamping region (non-holding region) that is not clamped by the clamper 23 of the lenticular sheet 3.
  • FIG. 15 shows a clamp region CL1 on one side of the lenticular sheet 3 and a clamp region CL2 on the other side. The detection line LL is formed in an unclamped region between CL1 and CL2.
  • FIG. 16 shows a lenticular sheet 3 on which another example detection line LL2 is formed.
  • the detection line LL2 of this example is formed in a shape lacking the mountain 4b of the lenticular lens 4. That is, the detection line LL2 is formed by skipping (making a notch shape) at least a part of one or a plurality of peaks of the lenticular lens 4.
  • Such a lenticular sheet 3 can be formed using, for example, a mold.
  • FIG. 17 shows a lenticular sheet 3 on which another example detection line LL3 is formed.
  • the detection line LL3 in this example is formed by coloring the peak 4b of the lenticular lens 4 in the longitudinal direction of the lenticular lens 4.
  • FIG. 16 shows a clamp region CL1 on one side of the lenticular sheet 3 and a clamp region CL2 on the other side.
  • the detection line LL is formed in an unclamped region between CL1 and CL2.
  • FIG. 18 shows a state in which the reference position of the lenticular lens 4 in the sub-scanning direction is detected by detecting the crest 4b of the lenticular lens 4 adjacent to the detection line LL based on the detection signal of the detection sensor.
  • a third detection sensor 35 is arranged between the first detection sensor 34 (S1) and the second detection sensor 36 (S2). Configured.
  • the third detection sensor 35 (S3) is disposed closer to the first detection sensor 34 (S1) than the center of the first detection sensor 34 (S1) and the second detection sensor 36 (S2). That is, at least one interval among the intervals of the plurality of detection sensors 34, 35, and 36 in the main scanning direction is arranged differently from any other interval.
  • the interval L23 between the second detection sensor 36 (S2) and the third detection sensor 35 (S3) is larger than the interval L13 between the first detection sensor 34 and the third detection sensor 35.
  • the three detection sensors 34, 35, and 36 provided in the conveyance path of the lenticular sheet 3 are arranged in the main scanning direction so that at least one of the intervals is different from any of the other intervals.
  • the bending amount of the head 16 can be obtained based on detection signals output from the detection sensors 34, 35, and 36, as will be described later.
  • FIG. 20 is a block diagram showing the configuration of the control system of the printer 2 in the second embodiment.
  • the elements shown in FIGS. 1 to 6 are denoted by the same reference numerals, and description of matters already described in the first embodiment will be omitted below.
  • the head bending amount measuring unit 78 calculates the bending amount with respect to the longitudinal direction of the head 16 based on the detection signals of the plurality of detection sensors S 1, S 2, S 3 that have detected the detection pattern 83 of the transparent sheet 82 and stores it in the memory 61.
  • the image correction unit 79 corrects the viewpoint image according to the amount of curvature of the head 16 acquired from the memory 61 so as to cancel the distortion of the viewpoint image formed on the lenticular sheet 3 due to the curvature of the head 16.
  • FIG. 21 is a flowchart showing an exemplary flow of measurement processing in the second embodiment. This process is executed by the CPU 60 according to a program. Steps S41 to S44 are the same as steps S11 to S14 in the first embodiment shown in FIG.
  • FIG. 22A shows a state in which the detection pattern 83 is printed on the transparent sheet 82 with the curved head 16 in step S42. Since the head 16 is curved, the detection pattern 83 printed on the transparent sheet 82 by the head 16 is also curved.
  • the curvature of the head 16 is exaggerated for easy understanding of the invention. Actually, the curvature of the head 16 is minute, but in the example shown in FIG. 2, a linear image is printed by dividing the lenticular lens 4 into six minute areas 5a to 5f. If the amount of curvature of the head 16 is large with respect to the width of the regions 5a to 5f, an image that is difficult to view stereoscopically is formed.
  • FIG. 22B shows a state in which the detection pattern 83 on the transparent sheet 82 is detected by the first detection sensor S1 and the second detection sensor S2 in step S43.
  • step S45 the head bending amount measuring unit 78 detects the rotation of the clamper 23 in the direction opposite to the tilt direction of the head 16 by the tilt angle ⁇ h by the clamper driving mechanism 25 as shown in FIG.
  • the detection signal peaks of the sensor S1 and the detection sensor S2 are matched. As a result, the amount of bending can be accurately calculated.
  • the head bending amount measuring unit 78 calculates the bending amount Dc of the head 16 based on the detection signals of the detection sensors S1, S2, and S3, and stores it in the memory 61.
  • DH3 is the distance from the third detection sensor S3 to the end of the detection pattern 83, and is calculated based on the detection signal of the third detection sensor S3.
  • D3 is the amount of positional deviation of the third detection sensor S3 from the reference line Lb (see FIG. 9). D3 is stored in the memory 61 in advance.
  • step S53 the transparent sheet 82 is discharged.
  • FIG. 24 is a flowchart showing a flow of an example of the stereoscopic image forming process. Steps S61 to S66 are the same as steps S21 to S26 of the stereoscopic image forming process in the first embodiment shown in FIG.
  • step S67 the image correction unit 79 acquires the bending amount Dc of the head 16 from the memory 61.
  • step S69 based on the corrected viewpoint image, the head 16 prints a plurality of linear images for each lenticular lens 4 on the back surface of the lenticular sheet 3, so that a three-dimensional image (a plurality of images is displayed on the lenticular sheet 3). Viewpoint image).
  • step S70 the lenticular sheet 3 on which the stereoscopic image is recorded is discharged.
  • the three detection sensors S1, S2, and S3 are provided in the conveyance path.
  • the number of detection sensors may be increased, and four or more detection sensors may be arranged on the conveyance path.
  • the present invention is not limited to such a case.
  • a head rotating means for rotating the head 16 around an axis perpendicular to the conveying surface of the lenticular sheet 3 may be provided.
  • the inclination correction control unit 70 rotates the head 16 by the head rotating means.
  • the present invention is not limited to such a case.
  • the moving speeds of the left and right ends of the lenticular sheet 3 may be matched to convey the lenticular sheet 3 in the sub-scanning direction so that the lenticular sheet 3 does not rotate.
  • the holding means for holding the lenticular sheet 3 is not particularly limited to the clamper 23.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Quality & Reliability (AREA)
  • Stereoscopic And Panoramic Photography (AREA)

Abstract

L'invention concerne un dispositif de formation d'image qui comprend : une unité de transport pour transporter une feuille lenticulaire dans une direction de balayage secondaire, la feuille lenticulaire comportant une pluralité de verres lenticulaires formés dans sa surface de manière à s'aligner dans la direction de balayage secondaire, et une ligne de détection formée dans la direction de la longueur des verres lenticulaires ; une pluralité de capteurs de détection comprenant un premier capteur de détection et un deuxième capteur de détection positionnés sur la ligne de référence dans une direction de balayage principale coupant à angle droit la direction de balayage secondaire, et positionnés sur la trajectoire de transport des verres lenticulaires ; une unité de mesure d'inclinaison de verre pour calculer l'angle d'inclinaison des verres lenticulaires par rapport à la ligne de référence, en fonction d'un signal de détection provenant de la pluralité de capteurs de détection, qui détectent la ligne de détection sur la feuille lenticulaire ; une tête pour enregistrer une pluralité d'images en perspective dans la feuille lenticulaire en enregistrant une pluralité d'images linéaires, qui correspondent à chaque verre de la pluralité de verres lenticulaires, sur la surface de la feuille lenticulaire à l'opposé de la surface sur laquelle sont formés les verres lenticulaires, la tête étant positionnée sur la trajectoire de transport de la feuille lenticulaire dans une direction de la longueur coupant la direction de balayage secondaire ; une unité d'enregistrement pour enregistrer l'angle d'inclinaison de la tête dans la direction de la longueur par rapport à la ligne de référence ; et une unité de commande de correction d'inclinaison pour faire correspondre l'angle d'inclinaison des verres lenticulaires et l'angle d'inclinaison de la tête en fonction de l'angle d'inclinaison des verres lenticulaires calculé par l'unité de calcul d'inclinaison de verre et de l'angle d'inclinaison de la tête enregistré dans l'unité d'enregistrement.
PCT/JP2011/066043 2010-09-30 2011-07-14 Dispositif et procédé de formation d'image WO2012043016A1 (fr)

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JP2010-222562 2010-09-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112623835A (zh) * 2021-01-08 2021-04-09 杭州爱科科技股份有限公司 一种双竖线带断点标线材料的纠偏检测方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0891633A (ja) * 1994-07-26 1996-04-09 Mitsubishi Electric Corp シート搬送装置
JP2007127521A (ja) * 2005-11-04 2007-05-24 Seiko Epson Corp レンズシート計測装置、このレンズシート計測装置を備える印刷装置およびレンズシート計測方法
JP2009096122A (ja) * 2007-10-18 2009-05-07 Seiko Epson Corp 移動区間決定方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0891633A (ja) * 1994-07-26 1996-04-09 Mitsubishi Electric Corp シート搬送装置
JP2007127521A (ja) * 2005-11-04 2007-05-24 Seiko Epson Corp レンズシート計測装置、このレンズシート計測装置を備える印刷装置およびレンズシート計測方法
JP2009096122A (ja) * 2007-10-18 2009-05-07 Seiko Epson Corp 移動区間決定方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112623835A (zh) * 2021-01-08 2021-04-09 杭州爱科科技股份有限公司 一种双竖线带断点标线材料的纠偏检测方法

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