JPH03116130A - Manufacture of stereographic image forming body - Google Patents

Abstract

PURPOSE:To attain a design while obtaining the impression which almost looks like a real object by pressing a thermal head providing heating body strings on the rear surface of a lenticular lens via a transfer ribbon and along the longitudinal direction of a convex lens, and carrying out transfer while moving the lenticular lens and the thermal head relatively. CONSTITUTION:The thermal head 2 providing heating body strings is pressed on the rear surface 1b of the lenticular lens 1 composed of plural convex lenses arranged in the form of stripes via the transfer ribbon 4 and along the longitudinal direction of the convex lens; an image on the right-eye side and an image on the left-eye side are transferred in the one pitch (d) of the lens 1 while relatively moving the lenticular lens 1 and the thermal head 2. Therefore, a thing designed on the screen of a display can be instantly converted into a stereographic image. Therefore, laying out or design can be carried out while confirming its volumetric feeling, etc., at real time.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a three-dimensional image forming body using a lenticular lens.

More specifically, a method for visualizing three-dimensional images with depth from computer-generated three-dimensional information will be discussed.

(Prior Art) With the development of computer technology, a technology has been developed to express an image in three-dimensional coordinates and visualize this on a display such as a CRT.

Since images are expressed in three-dimensional coordinates, images viewed from any angle or projected onto any plane can be reproduced on a display through computer operations. Furthermore, by operating the computer, the three-dimensional coordinates of the image can be changed to provide shading or to emphasize perspective on the zero image that can be used to design three-dimensional objects on the display screen.

However, displays are essentially flat, making it difficult to express images with depth. For this reason, the volume, overall balance, surface irregularities, etc. of a three-dimensional object could not be sufficiently expressed. For this reason,
There was a limit to the design that could be done on the screen.

On the other hand, a method of expressing a three-dimensional image using a lenticular lens in which lenses having a semicylindrical cross section are arranged in a stripe pattern is well known. Two parallax images of a three-dimensional object projected with binocular cameras are divided into stripes each corresponding to 1,000 lenses, and the left-eye and right-eye images are arranged alternately and optically compressed. This method then prints on the back side of the lenticular lens.

However, printing had to be performed in synchronization with the pitch of the lenses by combining images into stripes, and printing required specialized skill. Moreover, since it uses photographic technology or printing technology, it has not been possible to form a three-dimensional visible image from a computer containing the three-dimensional information.

For this reason, there was a problem in that it was not possible to design while checking the volume feeling etc. in real time.

(Problems to be Solved by the Invention) Therefore, the present invention provides a method for manufacturing a visualized three-dimensional image forming body from three-dimensional information stored in a computer without requiring specialized or skilled techniques. The purpose is to

(Means for Solving the Problems) In order to achieve this object, the present invention provides a technique for applying a transfer ribbon to the back surface of a lenticular lens formed by arranging a large number of semi-cylindrical lenses in a stripe pattern, using a transfer ribbon along the longitudinal sides of the semi-cylindrical lenses. Provided is a method for manufacturing a three-dimensional image forming body, characterized in that a thermal head having a row of heating elements is pressed along a direction, and the lenticular lens and the thermal head are transferred while moving relative to each other.

(Example) The lenticular lens according to the present invention has a large number of semicylindrical lenses arranged in a stripe pattern. FIG. 1 is an explanatory perspective view showing the state of transfer. As shown in the figure, the back surface (1b) of the lenticular lens (1) is flat, and the front surface (1a) has unevenness. The space between the concave portions on the surface constitutes one semicylindrical lens. The lens may be molded from plastic.

Furthermore, the transfer ribbon (4) according to the present invention provides an ink layer containing a colorant and a binder as main components on one side of a long base film, and applies a heated thermal head to the transferred object. It can be colored. There are two types, one in which the entire ink layer is transferred to the object to be transferred by the pressure of a thermal head, and one in which only the colorant is transferred to the object to be transferred, both of which are well known. In the former case, a colored pigment is preferably used as the colorant, and a heat-melting material such as wax is used as the binder. The latter uses a sublimable dye as a coloring agent, and transfer is performed by sublimating the dye and penetrating the inside of the object to be transferred. As the binder, polyvinyl acecool, polyvinyl butyral, etc. are preferably used.
In the present invention, the transfer ribbon (4) may be any type, but it is easy to express shades depending on the amount of heat generated by the thermal head, and mixed colors can be expressed by overlapping each color of yellow, magenta, and cyan. A transfer ribbon that transfers a sublimable dye is preferred because it is easy to transfer. C, 1, Disperse Yellow for yellow dye
8. C, 1, Disperse R for magenta dye
ed 9, C,1Disperse for cyan dye
Blue 36 etc. are available. The resin and the dye may be mixed at a weight ratio of 7:3 to 3.

The thermal head (2) has a built-in heating element at its tip, and generates heat when energized.
2) is plate-shaped and has a linear array of heating elements built into its tip. Transfer is performed using a thermal head (
2) is placed on the back surface of the lenticular lens (1), and electricity is applied to each heating element in accordance with a control signal from a computer. For example, energization is 5 to 50V, 0.1 to 50nse.
c, and the image is transferred by energizing each heating element.

The image to be transferred is a right eye side image and a left eye side image divided into stripes and arranged alternately.

Both the right eye side image and the left eye side image may be obtained by projecting a stereoscopic image designed or designed on a display onto bimanual planes that intersect with each other. Alternatively, an existing three-dimensional object may be projected using a binocular camera.

The right eye side image and the left eye side image are alternately scanned at fixed width intervals and output to the thermal head. For this reason, it is necessary to arrange the heating element array of the thermal head (2) along the longitudinal direction of the semicircular lens. After transferring one line of the output signal, the thermal head (2) and the lenticular lens (1) are moved relatively to transfer the next line.

The movement is performed in a direction perpendicular to the longitudinal direction of the semicylindrical lens. Even after moving, the heating element array remains arranged along the longitudinal direction of the semicylindrical lens. The movement is carried out by a platen roll (1b) in contact with the surface (1b) of the lenticular lens (1).
The amount of movement of the lenticular lens is detected by the rotation of the platen roll (3), which may be performed by the rotation of the platen roll (3).

The width of the right eye side image and the width of the left eye side image are both 172 times the convergence (pitch) d of the semicylindrical lens.

However, the surface (1a) of the lenticular lens (1)
In order to obtain a natural three-dimensional effect when viewed from an angle, it is desirable to change the angle of the three-dimensional object little by little and transfer the image projected by the binocular lenses into the pinch d of the semi-cylindrical lens. In this case, the width t of each image is 1/2 n. FIG. 1 shows n-5, that is, five binocular cameras A as shown in FIG.

This is an example in which 10 images taken with B, C, D, and E are arranged in a stripe pattern, which is t-d/10. In addition, A in the figure,
B, C, D, and E indicate cameras and captured images; R,
Similar operations can be performed in the CPU when using stereoscopic images designed or designed on a display, showing right eye side images and left eye side images, respectively.

In order to form a color image, each color may be transferred repeatedly.

In addition, when photographing an existing three-dimensional object with a binocular camera,
Since the thermal responsiveness of the transfer ribbon is not proportional to the strength of the electrical signal, gradation correction is performed to correct this, and color balance is necessary because the proportion of colorants that express the mixed color differs depending on the colorant. It is desirable to output the signal to the thermal head drive circuit after performing a correction to adjust it.

(Effects) According to the present invention, what is designed and designed on a display screen can be instantly converted into a three-dimensional image, so it is possible to design while obtaining an impression closer to the real thing.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, with FIG. 1 being an explanatory diagram of the transfer process, and FIG. 2 being an explanatory diagram at the time of photographing. (1)... Lenticular lens (2)...
Thermal head (3)...Platen roll (4)...Transfer ribbon (5)...Subject (d)...1 pitch of lenticular lens (1)...Left (right) ) Eye-side image width patent
Applicant: Toppan Printing Co., Ltd. Representative: Kazuo Suzuki Figure 1

Claims (1)

[Claims] (1) A thermal head having a row of heating elements along the longitudinal direction of the semi-cylindrical lens is pressed onto the back surface of a lenticular lens formed by arranging a large number of semi-cylindrical lenses in a stripe pattern through a transfer ribbon, and the lenticular lens is A method for producing a three-dimensional image forming body, comprising transferring a right eye side image and a left eye side image to one pitch of a lens while relatively moving a thermal head and a thermal head.