JP2682892B2 - Multi-element image display and multi-element image display method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention forms a plurality of different multi-dimensional images in the same plane as a transparent latent image, and successively transmits these images by transmitted or reflected light. In addition, the present invention relates to a versatile display method and display body capable of repeatedly extracting individual images at any time and blinking the display.

[Conventional technology]

A conventional method for displaying many images in the same plane sharing the same space is to divide the display surface into strips as shown in FIG. 6 and to divide them into strips (4). (5) A method of printing or directly drawing a divided image on a plate and rotating a strip plate to display a plurality of images successively, and a large number of minute light bulbs (6) shown in FIG. There is a device (7) for arranging and electrically displaying an arbitrary image by electric control, and the device of these display methods,
In both cases, the manufacturing method is complicated, the cost is high, the device is large due to structural restrictions, and it is difficult to make it a small and compact object with portability, and the invisibility of incorporating images is kept confidential. It was not used as a function.
On the other hand, there is a display method using a CRT or a liquid crystal as a portable device with a built-in image, but all of the devices have a highly electronic and complicated structure and the manufacturing cost is considerably high.

[Problems to be solved by the invention]

An object of the present invention is to share the same plane as an image display surface,
As a method of displaying multiple different images in this plane (hereinafter referred to as "multi-dimensional image display method"), it is possible to use the same means from extremely small and compact ones such as ID cards to fairly large ones such as indoor and outdoor display boards. In addition, the present invention is to provide a display body and a method thereof, which retains the confidentiality of an image and the anti-copying effect of a polarized light latent image and can freely take out and display an arbitrary image at any time when necessary. That is, the object of the present invention is to provide a polarizing plate for a physically free size multi-dimensional image display, from a compact and compact one that can be worn and carried to a fairly large one, as a precise in-plane multi-dimensional latent image display. The purpose is to be able to provide it at an extremely low cost.

[Means for solving the problem]

There have been some attempts to display an image using a polarizing plate, but all of them are single, ie, one-dimensional images. For example, as in a technical animation, a partial element of the displayed image blinks. I was just trying to elicit visual interest. Therefore, the present invention
Two or more kinds of multidimensional images are formed as transparent latent images on the same display plane by an assembly of minute polarizing films, and the function of image confidentiality due to their invisibility under normal illumination is given and uniaxial polarization Polarized illumination by a child makes it possible to extract any latent image as a visible image at extremely low cost and easily.
Enabled to display. The principle of the present invention will be described below.

To divide a plane into regular polygons of equal shape,
Mathematically, it is as shown in the table below.

In this case, the square and the regular hexagon also satisfy the condition with respect to the equi-orientation (all the constituent graphics must have the same orientation), but in the case of the equilateral triangle, they are composed of mutually symmetrical graphics. I'm not satisfied. The isotropic property of a figure is an important property as a pixel.

On the other hand, when an image is to be obtained as a printed matter, it is a well-known technique to decompose and express this meaningful image into minute non-meaning pattern pixels called halftone dots. This halftone dot is formed by a polarizing film, and halftone dots with different polarization axes
If the planes can be divided without invading each other, it is possible to form and represent a plurality of images, that is, multiple images in the same plane. More specifically, as shown in FIG. 1, in the multi-dimensional image forming body (1), a plurality of minute
A multi-dimensional image (A ₁ ), (A ₂ ), ... (A _N ) consisting of polarizing film pixels (a) [illustration is shown in the example of FIG. 2 below] is formed as a latent image, while uniaxially polarized light The child (2) can be exchanged or rotated on the multi-dimensional image forming body (1), and any one image (A ₁ ) can be taken out and displayed by the orthogonality or coincidence of the absorption axes.

As described above, the shape of the polarizing film pixel (a) of this unit is, in principle, an isotropic regular polygon, for example, 2 The original shape is a square, the three-dimensional shape is a regular hexagon, and the four-dimensional shape is a square.
The reason is that in order to have a function as a pixel of a display image, the unit polarization film pixels (a) of the same origin must be arranged at equal distances from each other, and the combination of different azimuth patterns is a factor of image expression power. This is because it causes decline and technical difficulty.

For example, some modifications such as parallelograms, equilateral triangles symmetrical to each other, and circles when binary are possible. However, as is clear from the principle, the halftone dot occupancy rate in the case of 2 yuan, that is, the gradation limit is 50%, the gradation limit in the case of 3 yuan is about 33%, and the gradation limit in the case of 4 yuan is 25%. Since it is subject to restrictions on the expression effect, the adoption of the deformation pattern is not desirable because it further restricts the expression when considering the display of a general image, but it is not preferable to use a circular shape, an oval shape, A star-shaped pattern or the like can be adopted if necessary.

The size of the unit polarizing film pixel (a) must be 50 points per inch, that is, about 500 μm or less, as in general printed matter, when displaying at a distance of clear vision. However, when using it as a general indoor / outdoor guide display or display of an exhibit, depending on the size of the viewing angle relative to the size of the angle of view of the display image, it may be 500 μm or more, and in some cases 1 mm or more. It may be of size.

Fixation of any image to the plane as a latent image is achieved by the following method.

That is, a screen pattern composed of specific polygons that evenly divides a plane into a ratio of 1 / N, which is the reciprocal of the assumed element number N, is created as an N-element net screen. The screen pattern occupancy ratio of this screen is 1 / N, and if the distance between screen dots is, for example, ternary 3, the aperture diameter is D D. Using this specific halftone screen, the original photographic original is halftone decomposed by the same procedure as the ordinary halftone decomposition to obtain a synthetic mask film. Then, a pair of synthetic mask films whose image forming surfaces are plane-symmetrical are produced by the reversal film.

From the remaining (N-1) original photo manuscript (N-
1) Make the original synthetic mask film.

Next, a pair of synthetic mask films are precisely laminated on both sides of the metal plate with the photosensitive solution applied on the front and back sides in advance, and double-sided exposure, development, and hardening treatment are performed in the same manner as the usual corrosion method, and the metal plate is corroded and perforated with the corrosive liquid. To obtain a metal mask plate in a net negative state. The remaining (N-1) original metal mask plate is obtained in the same manner.

If the desired image is a binary image like a line drawing,
It is also possible to directly obtain an N-element metal mask plate by punching puncher processing controlled by a computer.

Next, the original metal mask plate is superposed on a transparent support such as a pretreated transparent resin film or a glass plate and rubbed in a certain direction to form an oriented surface on the surface of the support. Next, rub with the second mask plate, but fix the second mask plate so that the rubbing surface comes to a predetermined position with an appropriate pin system, and change the angle from that of the first mask plate. . The most appropriate angle at this time is 180 / N degrees. Rubbing is performed on all N-original mask plates by the same procedure. In addition, for example, U.S. Pat.
According to the method described in the publication No., etc., an N-dimensional multi-dimensional polarized latent image can be obtained by appropriately selecting, applying and drying an orienting dye.

[Action]

An image display body formed by forming a plurality of multi-dimensional images on a transparent resin or glass plate as a latent image by assembling minute polarizing films having different polarization axes, retains the invisibility of these images under normal illumination. , So as to be located between the display and the light source or on the side opposite to the light source with respect to the display.
A desired image can be successively displayed at any time by placing an axial polarizing plate and replacing or rotating it under transmitted or reflected illumination.

〔Example〕

Example 1 As shown in FIG. Using a CAD system, make a manuscript that is formed with regular hexagonal patterns that are twice the distance and that 1/3 of the plane is regularly filled with these regular hexagonal patterns.
This is photographed with a plate-making camera using a lith film, and a negative film (hereinafter referred to as a pattern film) having a fine regular hexagonal pattern having an opening diameter D of 400 μm is produced.

Prepare three original films with different images. One of the films is overlaid with the above putter film, and a lith film is used for contact reversal to produce a film for a synthetic mask. Then, the film is subjected to contact exposure using a film for duplicating to produce a pair of films for synthetic masks having the same image and having different film surfaces. Similarly, two sets of synthetic mask films are produced from the other two image films.

Photoresist is applied to both sides of a stainless steel plate with a thickness of 0.1 mm, the above pair of synthetic mask films are overlapped so that the positions of the image parts on the front and back of the stainless steel plate are exactly aligned, contact exposure is performed, and the unexposed part is developed. Remove. Next, etching is carried out simultaneously on the front and back sides using a ferric chloride solution to produce a stainless mask plate having image perforations corroded and perforated. Two stainless mask plates are produced by the same method from the other two sets of synthetic mask films.

Next, one of the three stainless steel mask plates was placed on the corona-treated polyester film, and a certain direction was determined and rubbing with felt to form a surface in which the molecules on the film surface were oriented in a certain direction. To do. Then, instead of the second stainless mask plate, the same film is rubbed by changing the angle by 60 ° in the clockwise direction as in the case of using the first stainless mask plate. However, the portion where molecules are oriented by rubbing using the first stainless mask plate is fixed at a position where it is completely protected by the non-corroded portion of the second stainless mask plate. Next, change to the third stainless mask plate, and turn the same film surface further 60 ° clockwise.
The rubbing is performed in a direction in which the angle is changed, but the third stainless mask plate is fixed at a position where the surface of which is oriented by using the first and second stainless mask plates is not rubbed. These three rubbing parts are precisely positioned by the pin system so that they do not overlap each other.

Then, the rubbed film surface is coated with an orientational dye dissolved in an aqueous solvent and dried to obtain a film having a ternary polarized light latent image.

The multi-dimensional polarized latent image film is laminated on a transparent PET on which necessary items are printed in advance to produce an ID card. At the card presentation location, prepare the ID card and a uniaxial polarizing plate on a light table with a built-in fluorescent tube, and verify the authenticity certificate, the expiration date, and the wearer's appearance etc. You can instantly see and verify.

Practical example 2 As shown in FIG.
Using a CAD system, make a manuscript that is formed with square patterns that are twice as large as each other and that 1/4 of the plane is regularly filled with these square patterns. Then, a pattern film consisting of a minute square with one side of 300 μm is prepared.

Prepare four original films with different images. Four sets of synthetic mask films are prepared from the respective originals in the same manner as in Example 1.

A photoresist is applied to both sides of a 0.05 mm thick stainless steel plate, the above two synthetic mask films are overlapped so that the positions of the image parts on the front and back of the stainless steel plate are exactly aligned, contact exposure is performed, and the unexposed part is developed. Remove. Next, etching is carried out simultaneously on the front and back sides using a ferric chloride solution to produce a stainless mask plate having image perforations corroded and perforated. Three stainless mask plates are produced by the same method from the other three sets of synthetic mask films.

Next, stack one of the stainless mask plates on the corona-treated polyester film, set a certain direction,
Rubbing with felt. Then, instead of the second stainless steel mask plate, the same film is rubbed by changing the angle by 45 ° in the clockwise direction as in the case of using the first stainless steel mask plate. However, the portion where molecules are oriented by rubbing using the first stainless mask plate is fixed at a position where it is completely protected by the non-corroded portion of the second stainless mask plate. Next, change to the third stainless mask plate,
The same film surface is further rubbed in a direction with a 45 ° angle change in the clockwise direction, but the portion where the surface is oriented by using the first and second stainless mask plates is placed in a position where it is not rubbed by the third stainless mask plate. To fix. Then the fourth
The same film surface is rubbed in a direction with a 45 ° angle change further clockwise, instead of the stainless mask plate of No. 1, but the part where the surface is oriented using the first, second and third stainless mask plates is The fourth stainless mask plate is fixed at a position where it is not rubbed. The four rubbing parts are accurately positioned so that they do not overlap each other.

Then, the rubbed film surface is coated with an alignment dye dissolved in an aqueous solvent and dried to obtain a film having a quaternary polarized latent image.

This multi-dimensional polarized latent image film is laminated on a transparent PET on which various items are printed in advance to produce a card admission ticket. Immediately confirm the authenticity certificate, qualification requirements, expiration date, and personal appearance of the person carried on the card as a latent image on a light table with a uniaxial polarizing plate and a fluorescent tube built in at the card presentation location. Can be visually checked and collated.

Example 3 As shown in FIG. Using a CAD system, make a manuscript that is formed by a circular pattern that is twice as long as the plane π / 8 is regularly filled with these circular patterns. A pattern film consisting of a minute circle with a diameter of 500 μm is prepared.

Prepare two original films with different images. Two sets of synthetic mask films are produced from each original in the same manner as in Example 1.

Photoresist is applied to both sides of a stainless steel plate with a thickness of 0.1 mm, the above set of synthetic mask films are overlapped so that the positions of the image areas on the front and back of the stainless steel plate are exactly aligned, contact exposure is performed, and the unexposed area is developed. Remove. Next, etching is carried out simultaneously on the front and back sides using a ferric chloride solution to produce a stainless mask plate having image perforations corroded and perforated. From another set of synthetic mask films, one stainless mask plate is prepared by the same method. Next, one of the stainless mask plates is overlaid on the corona-treated polyester film, a certain direction is determined, and rubbing is performed with a felt.
Then, instead of the second stainless mask plate, the same film is rubbed by changing the angle by 90 ° in the clockwise direction as in the case of using the first stainless mask plate. However, the portion where molecules are oriented by rubbing using the first stainless mask plate is fixed at a position where it is completely protected by the non-corroded portion of the second stainless mask plate. The two rubbing parts are accurately positioned so that they do not overlap each other.

Then, the above-mentioned rubbed film surface is coated with an orientational dye dissolved in an organic solvent and dried to obtain a film having a binary polarized latent image. This multi-polarized latent image film is laminated on a transparent PET on which various items are printed in advance, and an entrance certificate is prepared by backing a metal plate with high reflectance. A uniaxial polarizing plate is prepared at the presentation location, and the authenticity certificate, qualification requirements, etc., which are embedded as latent images in this card, can be immediately viewed and collated under a normal lighting device.

Example 4 As shown in FIG. Using a CAD system, make a manuscript that is formed by a square pattern that is twice the distance and that half of the plane is regularly filled with these square patterns. Then, a pattern film having a minute square of 500 μm on a side is prepared.

Prepare two original films with different images. Two sets of synthetic mask films are produced from each original in the same manner as in Example 1.

Photoresist is applied to both sides of a copper plate with a thickness of 0.2 mm, the above two synthetic mask films are overlapped so that the positions of the image parts on the front and back of the copper plate are exactly aligned, contact exposure is performed, and the unexposed part is removed by development. . Next, etching is carried out simultaneously on the front and back sides using a ferric chloride solution to produce a copper mask plate in which the image area is corrosively perforated. A copper mask plate is prepared from another set of synthetic mask films by the same method.

Next, one of the copper mask plates is overlaid on the corona-treated polyester film, a certain direction is determined, and rubbing is performed with a felt. Then, instead of the second copper mask plate, the same film is rubbed by changing the angle by 90 ° in the clockwise direction as in the case of using the first copper mask plate. However, the portion where the molecules are oriented by rubbing using the first copper mask plate is
Fix in a position completely protected by the non-corroded parts of the second copper mask plate. The two rubbing parts are accurately positioned so that they do not overlap each other.

Then, the above-mentioned rubbed film surface is coated with an orientational dye dissolved in an organic solvent and dried to obtain a film having a binary polarized latent image. This multi-dimensional polarized latent image film is laminated on transparent PET on which various items are printed in advance to produce a guide display board. Two different guide items inserted as a latent image on the same display surface of the display plate are set by using an illuminating device with a built-in fluorescent tube having a rotatable uniaxial polarizing plate at the installation location. It can be displayed at two specified times.

〔The invention's effect〕

The image display body produced by the present invention, which is formed as a latent image by assembling a plurality of multi-dimensional images on a transparent resin or a glass plate as a latent image by the assembly of minute polarizing films having different polarization axes, is used for these images under normal illumination. Due to the invisibility of the image, the confidentiality of the image is sufficiently exerted. If this display is used for an ID card, a bond, etc., it is extremely difficult to duplicate an image embedded as a latent image, and it has an excellent anti-counterfeiting effect.

Further, if a uniaxial polarizing plate is placed between the display and the light source or on the side opposite to the light source with respect to the display, and is replaced or rotated under transmitted or reflected illumination, It is very easy to take out any built-in image and check the authenticity of the card and the confirmation items very quickly and easily.

On the other hand, if this display is used as an indoor / outdoor guide display, at a specified position, at any time or successively,
A desired image can be extracted and displayed from the image contained as a latent image. Further, these display bodies can be easily mass-produced.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a display body and a display method according to the present invention, and FIGS. 2, 3, 4 and 5 are three-dimensional and four-dimensional, respectively.
FIG. 6A, FIG. 6B, and FIG. 7 are views for explaining the state of the mask screen in the case of the original and dual elements, and are explanatory views of the same plane multiple display method in the conventional apparatus. 1 ... Multi-dimensional image forming body 2 ... Uniaxial polarizer 3 ... Light source 4, 5 ... Strip display plate 6 ... Micro light bulb 7 ... Electronic display plate

Claims (5)

(57) [Claims] 1. A transparent display member having a multi-dimensional latent image in which two or more meaningful images different from each other in the same plane are constituted by polarization pixels each having a regular pattern having different polarization axes. 2. A transparent image according to claim 1, which has a multi-element latent image in which two or more meaningful images different from each other are formed in the same plane by specific regular polygonal polarization pixels having different polarization axes. Display body. 3. A uniaxial polarizer from a transparent display having a multi-dimensional latent image in which two or more meaningful images different from each other in the same plane are composed of polarization pixels each having a regular pattern with different polarization axes. To extract any one-dimensional latent image,
A multi-dimensional image display method characterized by displaying. 4. A transparent display having a multi-element latent image formed by specific regular polygonal polarization pixels having different polarization axes from different meaningful images of two or more elements in the same plane, and optionally using a uniaxial polarizer. 4. The multi-dimensional image display method according to claim 3, wherein the latent image of one element is extracted and displayed. 5. A multi-dimensional latent image in which two or more meaningful images different from each other in the same plane are constituted by polarization pixels having a regular pattern with different polarization axes.
And ID cards attached with the transparent display described in 2 and 2, certificates such as stock certificates, bonds, gift certificates, etc. and proof of identity, rights, qualifications, etc. such as passports, registration certificates, admission tickets, immigration certificates.