JP6314586B2 - Image display - Google Patents

Description

  The present invention relates to an image display that can be used for personal authentication, for example.

In many cases, personal authentication media such as ID (IDentification) cards and passports use facial images to enable visual personal authentication.
A passport, which is an example of a personal authentication medium, has an owner display unit that displays an owner's face image. Since the display of face images by posting face photos may be tampered with by changing the face photos, recent owner display units have reproduced the face images of owners on paper instead of posting face photos. Adopting fixing.
Image reproduction methods include, for example, a method of reproducing a face image using fluorescent ink, a method of reproducing a face image using ink containing a colorless or light-colored fluorescent dye and a colored pigment, and a face using a pearl pigment. A method for reproducing an image is known (for example, see Patent Documents 1 to 3).

JP 2000-141863 A JP 2002-226740 A Japanese Patent Laid-Open No. 2003-170685

However, even for a face image reproduced by the above-described image reproduction method, the visual effect of the face image is simple, so it is easy to forge or tamper, and the authenticity of the face image can be determined visually. It has the problem of being difficult.
The present invention is intended to solve such problems, is difficult to tamper with, exhibits a more complex and characteristic visual effect, can record individual information as a latent image, and determines authenticity. An object of the present invention is to provide an image display body capable of easily performing the above.

One aspect of the present invention includes a plurality of linear protrusions formed on one surface of a substrate,
The height of a part of the convex portion is changed to a height corresponding to an image to be displayed.
In one embodiment of the present invention, the convex portion is formed by thermal transfer using a thermal head with respect to a transfer ribbon in which a release layer and an adhesive layer are sequentially formed on a wound film. It is an image display.
Another embodiment of the present invention is the image display body in which the sum of the thickness of the release layer and the thickness of the adhesive layer is in the range of 0.2 μm to 30 μm.

Another embodiment of the present invention is the image display body in which the release layer includes a diffusing agent.
Another embodiment of the present invention is the image display body in which the convex portion is formed in a linear shape in a direction orthogonal to the observation direction of the image to be displayed.
In one embodiment of the present invention, the convex portion and the concave portion formed between the adjacent convex portions may be transferred to the same location multiple times at a ratio within a range of 1: 9 to 9: 1. This is a characteristic image display body.
Another embodiment of the present invention is the image display body in which the one transfer of the plurality of transfers transfers the convex portion to all regions of the image to be displayed.

  According to one embodiment of the present invention, by recording individual information as a latent image, it is possible to provide a personal authentication medium that is easy to determine authenticity by visual observation.

It is an example of the image display body of 1st embodiment of this invention, and is a top view which shows the personal authentication medium provided with the image display part in the state which opened the paper surface in which the image display part was provided. It is sectional drawing which shows the structure of a transfer ribbon. It is a side view which shows the structure of the image display part of 1 layer. FIG. 4 is a view taken in the direction of the arrow IV in FIG. 3 and is a plan view showing an image of a single-layer image display unit. It is a side view which shows the structure of a two-layer image display part. FIG. 6 is a view taken along line VI in FIG. 5 and is a plan view showing an image of a two-layer image display unit. It is a side view which shows the observation method of authenticity determination of an image display body. It is a block diagram which shows an example of a transfer ribbon. 1 is a configuration diagram illustrating an example of a printer that forms an image display body according to a first embodiment of the present invention on a personal authentication medium. FIG.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
Hereinafter, a first embodiment of the present invention (hereinafter referred to as the present embodiment) will be described with reference to the drawings.
(Configuration of personal authentication medium 10)
As shown in FIG. 1, the personal authentication medium 10 is a booklet composed of binding paper 11 and a cover 12, and has a plurality of paper surfaces 13.
The cover 12 has a display function for displaying an image including personal information, and is folded in two so as to sandwich the binding paper 11.
Here, personal information includes personal authentication information used for owner authentication, and is classified into, for example, biometric information and non-biometric personal information.

The biometric information indicates a biometric feature of the owner. In addition, the biological information is, for example, at least one of a face, a fingerprint, a vein, and an iris, and is recorded in a format that can be read by an optical method.
Non-biological personal information is personal information other than biological information. The non-biological personal information is, for example, at least one of name, date of birth, age, blood type, gender, nationality, address, permanent address, telephone number, affiliation, and status. The non-biological personal information may be characters formed by typing, a handwritten signature of the owner, or a combination thereof.
Further, the cover 12 includes a first image display unit 15, a second image display unit 16, a third image display unit 17, a fourth image display unit 18, and a fifth image display unit 19.

The first image display unit 15 and the second image display unit 16 are portions where the wavelength and amplitude of light are recorded, and display an image using light absorption. That is, for example, when the first image display unit 15 and the second image display unit 16 are irradiated with white light, each part of the first image display unit 15 and the second image display unit 16 is recorded with the light recorded therein. Visible light corresponding to the wavelength of light and the amplitude of light is reflected to display a visible image.
Moreover, the 1st image display part 15 and the 2nd image display part 16 contain dye and a pigment as a forming material, for example. The first image display unit 15 and the second image display unit 16 are formed by a thermal transfer recording method using a thermal head, an ink jet recording method, an electrophotographic method, or a combination of two or more thereof.
The first image display unit 15 and the second image display unit 16 may be formed by drawing with a laser beam on a layer containing a thermal color former, or may be formed by a combination of these methods. Further, at least one of the first image display unit 15 and the second image display unit 16 may be formed by a thermal transfer recording method using a hot stamp, may be formed by a printing method, or a combination thereof. It may be formed.

The third image display unit 17 stores a light wavelength, light amplitude, and phase, and displays an image using light diffraction. This is because, for example, when the third image display unit 17 is irradiated with white light, each part of the third image display unit 17 emits light according to the wavelength, amplitude and phase of the light recorded therein. A diffracted and visible image is displayed.
The fourth image display unit 18 has a hologram element having a diffraction grating. The fourth image display unit 18 is formed, for example, by performing thermal transfer recording using a thermal head and thermal transfer recording using a hot stamp or a heat roll in this order.
The images displayed by the first image display unit 15 and the fourth image display unit 18 are the face images of the owner. Here, the face image included in the image displayed by the first image display unit 15 and the face image included in the image displayed by the fourth image display unit 18 may have the same or different outer dimensions. .

Further, each of the images displayed on the first image display unit 15 and the fourth image display unit 18 may include other biological information instead of the face image, and further includes biological information other than the face image in addition to the face image. May be included.
The image displayed by the fourth image display unit 18 may include non-biological personal information instead of the biological information, and may further include non-biological personal information in addition to the biological information. The image displayed by the fourth image display unit 18 may include non-personal information instead of personal information, and may further include non-personal information in addition to the personal information.
The image displayed by the second image display unit 16 includes non-biological personal information and non-personal information. The image displayed by the second image display unit 16 is composed of, for example, one or more of characters, symbols, codes, and marks.

The image displayed by the third image display unit 17 is a background pattern. This is because, for example, the image displayed on the third image display unit 17 overlaps the face image displayed on the first image display unit 15 or the face image displayed on the fourth image display unit 18, thereby causing the personal authentication medium 10. Tampering is further suppressed.
The configuration of the fifth image display unit 19 will be described later.
On the paper surface 13, paper surface information 14 such as a character string and a background pattern is printed. Note that the paper surface 13 may include an IC chip on which personal information is recorded, an antenna for non-contact communication with the outside, and the like.

(Configuration of the fifth image display unit 19)
The fifth image display unit 19 is formed using the transfer ribbon 20 shown in FIG.
The transfer ribbon 20 includes a base material 21, a release layer 22 positioned on the base material 21, and an adhesive layer 23.
The base material 21 is, for example, a resin sheet including a resin film and a flat resin thin plate having a surface that is thicker than the resin film and sufficiently wider than the thickness. Moreover, the base material 21 is formed from the material excellent in heat resistance, such as a polyethylene terephthalate, for example. In addition, the base material 21 is a base material that supports the adhesive layer 23, and instead of the release layer 22, for example, a fluororesin or a silicone resin is used on the surface of the base material 21 that supports the adhesive layer 23. A mold release layer may be provided.
Further, as shown in FIG. 3, the fifth image display unit 19 includes a transfer target 31 and a first transfer image 32 that is a transfer image of the first layer.

The first transfer image 32 is formed by transferring the release layer 22 and the adhesive layer 23 to the transfer target 31 of the fifth image display unit 19. Specifically, in the first transfer image 32, the adhesive layer 23 is brought into intimate contact with the transfer target 31, and the thermal head is brought into intimate contact from the substrate 21 side and heated by the thermal head, whereby a stripe-shaped transfer image is obtained. It is formed by transferring.
Further, as the first transfer image 32 transferred to the transfer target 31, for example, a uniform striped image is used over the entire area of the fifth image display unit 19 as shown in FIG. When the first transfer image 32 is transferred to the transfer target 31, one linear transfer is transferred to the entire area of the image to be displayed once in a plurality of transfers.
When transferring the second transfer image 52, which is the transfer image of the second layer, to the transfer target 31, the transfer target in a state where the first transfer image 32 is transferred as shown in FIG. The adhesive layer 23 is brought into intimate contact with 31, and the thermal head is brought into intimate contact with the substrate 21, and heated with the thermal head to transfer the stripe-shaped transfer image. Here, the transfer position of the second transfer image 52 is the same as the transfer position of the first transfer image 32.

In the present embodiment, as an example, a case where an image representing an English character “AB” is used as the second transfer image 52 will be described. Therefore, in the present embodiment, when the second transfer image 52 is transferred to the transfer target 31, an image representing the English character “AB” is displayed on the fifth image display unit 19 as shown in FIG. Will be. Here, in the second transfer image 52, the second layer is superimposed on the part with the character, and the convex part of only the first layer is on the part without the character.
In the present embodiment, as an example, a case will be described in which the total thickness of the release layer 22 and the adhesive layer 23 is in the range of 0.2 μm to 30 μm. This is because it is difficult to recognize an image when observed from the front, and it is easier to recognize an image when observed from an inclined direction. The contrast between the image observed from the front and the image observed from the inclined direction is This is because the image display body becomes larger and the displayed image is easier to visually recognize.

  Further, the release layer 22 is an image display body containing a diffusing agent. In a state where the first transfer image 32 and the second transfer image 52 are transferred to the transfer target 31, the release layer 22 is the outermost surface. For this reason, by including a diffusing agent in the release layer 22, it becomes easier to recognize the stripe-shaped convex portions in a state where the first transfer image 32 and the second transfer image 52 are transferred to the transfer target 31. In particular, when observed from an inclined angle, the resin layer containing the diffusing agent is observed from an oblique direction, and the effect of diffusion is increased.

As shown in FIG. 7, when observed from a viewpoint 71 perpendicular to the transfer target 31, the second transfer image 52 of the second layer transferred to the transfer target 31 is It is not recognized as being assimilated with the first transfer image 32 of the first layer, but is recognized as a uniform stripe image on the entire surface, which is the transfer image of the first layer.
However, when viewed from the viewpoint 72 in the direction inclined from the viewpoint 71 with the stripe-like straight line transferred to the transfer target 31 as an axis, the second layer transfer image 52 is observed separately, The second transfer image 52 can be recognized.

That is, in the case of the transfer target 31 having the above-described configuration, the above-described image can be visually recognized by observing the transfer target 31 from a direction inclined with a straight line perpendicular to the observation direction as an axis. It becomes possible. Further, by using the transfer ribbon 20 and the thermal head, individual information can be recorded as a latent image.
Here, in this embodiment, as an example, the plurality of linear convex portions (the first transfer image 32 and the second transfer image 52) are linear in a direction orthogonal to the observation direction of the image to be displayed. The case where it is formed and the repetition width of each convex portion is 0.005 mm or more will be described. This is because the resolution of a general thermal head is about 1200 dpi to 2400 dpi. The resolution is about 0.021 mm to about 0.011 mm.

Moreover, in this embodiment, the case where the repetition width | variety of several linear convex part shall be 0.5 mm or less as an example is demonstrated. This is because if the repetition width of the plurality of linear convex portions is set to an interval exceeding 0.5 mm, the image cannot be recognized even if it is inclined.
Moreover, in this embodiment, the case where the ratio of a convex part and a recessed part shall be in the range of 1: 9 to 9: 1 as an example is demonstrated. This is because the angle from the vertical direction can be reduced as the inclination angle observed from the inclined direction, and the accuracy range in which the image can be observed can be widened.
Here, the surface of the transfer target 31 is preferably flat like a card. In the case of a passport, the transfer surface is not a paper material but is made of resin such as polycarbonate or coated with resin. It is desirable that the booklet be. This is because the visibility of the recorded latent image is deteriorated due to the influence of the surface irregularities.

Further, as shown in FIG. 8, the transfer ribbon 20 has a diffraction grating panel that can observe diffracted light of each of red, green, and blue wavelengths when observed from a predetermined position. In addition, the transfer ribbon 20 uses the R (red) panel 81, the G (green) panel 82, and the B (blue) panel 83 when transferring the fourth image display unit 18, so that the red, red, Transfer green and blue images.
When the fifth image display unit 19 is transferred, the fifth image is transferred using the C panel 84 of the transfer ribbon 20. Since the C panel 84 is transferred twice, the C panel 84 is longer than the R panel 81, the G panel 82, and the B panel 83.
In addition, when the fifth image is transferred twice, the transfer ribbon 20 is a positioning mark necessary for accurately performing the second transfer at the positions of the plurality of linear protrusions transferred the first time. 85.

(Printer configuration)
The printer 90 that forms the image display body of the present embodiment on the personal authentication medium 10 includes an insertion unit 91 as shown in FIG.
When the image display body is formed on the personal authentication medium 10 using the printer 90, first, the personal authentication medium 10 inserted from the insertion unit 91 is conveyed to the thermal head 94 and the platen roll 95 by the conveyor.
Then, the transfer ribbon 20 is disposed on the unwinding 93, and the transfer ribbon 20 unwound by the unwinding 93 and the winding 96 is brought into close contact with the personal authentication medium 10 between the thermal head 94 and the platen roll 95.
Further, the transfer position is determined by the positioning mark 85 of the transfer ribbon 20, and the image is transferred by the thermal head 94 and the platen roll 95. When transferring the fourth image display unit 18, after transferring the R panel 81, the platen roll 95 is reversed and the personal authentication medium 10 is moved to a position where the G panel 82 is transferred. The image is transferred from the B panel 83 by repeating normal rotation and reverse rotation. The fourth image is transferred by the operation as described above.

Next, the fifth image is transferred using the C panel 84 of the transfer ribbon 20. Specifically, the platen roll 95 moves the personal authentication medium 10 to a position where the fifth image is transferred, and transfers the first fifth image. Further, the platen roll 95 is reversed, and the second fifth image is transferred to the same position as the first transfer position. Then, after the fifth image is transferred twice, the personal authentication medium 10 is discharged by the discharge unit 97.
In the configuration shown in FIG. 9, the fourth image and the fifth image are directly transferred to the personal authentication medium 10. However, for the fourth image, the intermediate transfer is performed on the intermediate transfer medium to perform personal authentication. There is also a method of performing transfer again on the medium 10. Moreover, about the 5th image, since the height of a convex part is provided by performing the transcription | transfer several times to the same location, it cannot transfer by an intermediate transfer system.

The personal authentication medium 10 transferred by the above method is an image display body that is difficult to recognize when viewed from the front, and more easily recognized when viewed from an inclined direction. By recording information as a latent image, it is easy to determine authenticity by visual observation.
The image displayed by the image display body may include other biological information in addition to the face image, or may include other biological information instead of the face image. Further, the image displayed by the image display body may include at least one of non-biological personal information and non-personal information in addition to the biological information. At least one of them may be included.

Further, the image displayed by the image display body is not limited to the face image of the owner, and may be, for example, letters, numbers, symbols, figures, patterns, or combinations thereof.
In addition, the image display medium is not limited to a personal authentication medium. For example, a credit card, a driver's license, an employee ID card, an ID card such as a membership card, an admission ticket for an entrance examination, a passport, a banknote, a gift certificate, a point Cards, stock certificates, securities, lottery tickets, horse tickets, bank passbooks, boarding tickets, passports, air tickets, admission tickets for various events, play tickets, prepaid cards for transportation and public telephones, etc.

(Effects of the first embodiment)
The effects of this embodiment are listed below.
(1) An image can be visually recognized by observing the image display body from an inclined direction with a straight line perpendicular to the observation direction as an axis. Further, by using the transfer ribbon 20 and the thermal head, individual information can be recorded as a latent image.
(2) It is possible to reduce the angle of the tilt angle observed from the tilted direction from the vertical direction, and it is possible to widen the accuracy range in which the image can be observed.
(3) When the image is observed from the front, it is difficult to recognize the image, and when the image is observed from the inclined direction, the image is more easily recognized. The contrast between the image observed from the front and the image observed from the inclined direction is It becomes possible to form an image display body that becomes larger and makes it easier to visually recognize the display image.

  DESCRIPTION OF SYMBOLS 10 ... Personal authentication medium, 11 ... Binding paper, 12 ... Cover, 13 ... Paper surface, 14 ... Paper surface information, 15 ... 1st image display part, 16 ... 2nd image display part, 17 ... 3rd image display part, 18 ... 4th image display part, 19 ... 5th image display part, 20 ... Transfer ribbon, 21 ... Base material, 22 ... Release layer, 23 ... Adhesive layer, 31 ... Transfer object, 32 ... First transfer image, 52 ... First Two transfer images, 71 ... viewpoint, 72 ... viewpoint, 81 ... R panel, 82 ... G panel, 83 ... B panel, 84 ... C panel, 85 ... positioning mark, 90 ... printer, 91 ... insertion unit, 93 ... unwinding 94 ... thermal head, 95 ... platen roll, 96 ... winding, 97 ... discharge unit

Claims (5)

Provided with a plurality of linear protrusions formed on one surface of the substrate,
The convex portion is formed by thermal transfer using a thermal head with respect to a transfer ribbon in which a release layer and an adhesive layer are sequentially formed on a wound film.
An image display body, wherein a height of a part of the convex portion is changed to a height corresponding to an image to be displayed. The image display body according to claim 1 , wherein the total thickness of the release layer and the thickness of the adhesive layer is in a range of 0.2 μm to 30 μm. Image display according to claim 1 or claim 2 wherein the release layer is characterized in that it comprises a diffusing agent. The repetition width which is the width between the adjacent convex portions is in the range of 0.005 mm or more and 0.5 mm or less,
The said convex part and the recessed part formed between the said adjacent convex parts are transcribe | transferred several times to the same location in the ratio within the range of 1: 9-9: 1. 4. The image display body according to any one of 3 above. 5. The image display body according to claim 4 , wherein one of the plurality of times of transfer transfers the convex portion to all regions of an image to be displayed.

Images