JPH06143628A - Display and displaying method - Google Patents

Abstract

PURPOSE:To obtain a display excellent in visibility which can produce an image for large screen at a low cost by constituting the display of a thermal recording medium, a printer, an illuminator, and a display with the thermal recording medium and the display being arranged closely while facing each other. CONSTITUTION:An image having different transparency is formed through a thermal means in a thermal head 5-1 installed in a printer 5 onto a thermal recording medium 4 comprising a transparent support 2 and a reversible thermal recording layer 3 rotatable about rollers 11. When the image is irradiated with light from an illuminator 1 comprising a reflector 1-2 for equalizing the quantity of light emitted from a halogen lamp 1-1, a large quantity of light transmits through a transparent part 9 as compared with an opaque part 10. On the other hand, a light scattering display 6 is disposed closely to the thermal recording medium 4 while opposing to the surface thereof. When the light transmitted through the thermal recording medium 4 further transmits through the display 6 composed of a transparent support 2 and a light scattering layer 7, total quantity of light decreases to provides a viewer 8 with a high contrast image where the transparent part 9 is bright and the opaque part 10 is dark.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device and a display method using a thermosensitive recording medium capable of reversibly recording and erasing an image by heating.

[0002]

2. Description of the Related Art Conventionally, as a display device, a CRT (CATHODE-
RAY TUBE), liquid crystal display devices, plasma display devices, etc. are used. CRTs are used in many fields because they can produce bright screens and color moving images, but they have the drawbacks that it is difficult to make large screen devices and that the devices themselves consume large amounts of power. is doing. Liquid crystal display devices have many advantages such as mobile TVs, personal computers, and various measuring devices because they have the excellent feature that they can make color movies with extremely low power and are small in size. However, it has a drawback that visibility is greatly different depending on the angle. Although plasma display devices are also used for many displays, they still have the problems that it is difficult to make a large screen and that visibility is poor.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems in the prior art, to produce a large-screen image at low cost, and to provide a display device excellent in visibility. It provides a display method.

[0004]

DISCLOSURE OF THE INVENTION According to the present invention, there is provided a thermosensitive recording medium comprising a reversible thermosensitive recording layer whose transparency can be reversibly changed with temperature, and an image-like change in transparency of the thermosensitive recording medium. A printing device equipped with a heating means capable of
A light irradiation device disposed on one side of the thermal recording medium and a light-transmissive and light-scattering display disposed on the other side, and the surface of the thermal recording medium and the display. The present invention relates to a display device characterized in that the surfaces are arranged close to each other.

Further, according to the present invention, an image is formed or erased on a thermosensitive recording medium composed of a reversible thermosensitive recording layer whose transparency can be reversibly changed with temperature, by a printing device having a heating means. It is possible to project the image-like transmitted light obtained by irradiating light from the light irradiating device onto one surface of the light-transmissive and light-scattering display body and visually recognize the projected image from the other surface of the display body. The present invention relates to a characteristic display method.

The details of the display device and the display method of the present invention will be described below with reference to FIG.

FIG. 1 shows an example of the arrangement of each device in the display device of the present invention. First, the roller 1 formed endlessly
1, a transparent support 2 and a reversible thermosensitive recording layer 3 which wrap around
An image having different transparency is formed on the thermosensitive recording medium 4 consisting of the thermal head 5-1 installed in the printer 5 by thermal means. When this image is irradiated with light from the light irradiation device 1 which makes the light amount of the halogen lamp 1-1 uniform by the reflecting mirror 1-2, a large amount of light is transmitted through the transparent portion 9 and a small amount of light is transmitted through the opaque portion 10. Will be done.

On the other hand, on the surface of the thermosensitive recording medium, a light-scattering display 6 is provided close to the surface. In this case, the proximity means that the surface of the thermosensitive recording medium and the surface of the display body may be separated as shown in FIG. 1, or both surfaces may be in contact with each other without viscous adhesion. Then, the amount of light transmitted through the thermosensitive recording medium is further reduced when it passes through the display 6 including the transparent support 2 and the light scattering layer 7. As a result, the viewer 8 can see a bright and dark image with excellent visibility in which the transparent portion 9 of the thermal recording medium 4 is bright and the opaque portion 10 is dark. Further, when the formed image is erased, the image is erased by the thermal means of the heat roller 5-2.

In the present invention, in order to clarify the visible image on the display, and to enlarge or reduce the recording on the thermosensitive recording medium and project it on the display, the light irradiation device and the thermosensitive recording medium. , A lens can be disposed at least at any position between the thermal recording medium and the display, and between the display and the viewer.

In the display device of the present invention, in order to display image information, the thermal recording medium is fixed and the printing device is moved to form an image, and the printing device is fixed and the thermal recording medium is moved. In some cases, an image is formed by using this. In the latter case, a roll-shaped thermosensitive recording medium is unwound as necessary, or as described above, the thermosensitive recording medium is repeatedly formed into an endless belt by using a movable shaft such as a roller 11 as shown in FIG. The method used can be considered.

Next, the structure of the present invention will be sequentially described in detail.

The thermosensitive recording medium referred to in the present invention is, for example, a transparent support provided with the reversible thermosensitive recording layer.
Incidentally, when the reversible thermosensitive recording layer itself has a sufficient coating film strength, the transparent support is not always necessary.

As the transparent support in the present invention, synthetic resin films such as polyvinyl chloride, polyester, polycarbonate, polyacetate and polyimide, and transparent glass can be used.

With a reversible thermosensitive recording layer whose transparency can change reversibly with temperature, the transparency when it is once heated and then cooled to around room temperature is different from that before heating, and when it is further heated, it returns to the original transparency. Moreover, it means that this phenomenon can be repeated. As such a reversible heat-sensitive recording layer, for example, the one proposed in JP-A-3-180388 can be applied to the present invention.

That is, the reversible thermosensitive recording layer has a structure in which an organic low molecular weight substance is dispersed in an organic high molecular weight substance.

The organic polymer substance has good transparency,
Those having excellent mechanical strength and good film-forming property are preferable. Specific examples thereof include polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl acetate-vinyl alcohol copolymer, vinyl chloride-vinyl acetate-maleic acid copolymer, vinyl chloride-acrylate copolymer. , Polyvinylidene chloride, vinylidene chloride-vinyl chloride copolymer, vinylidene chloride-acrylonitrile copolymer, polyester resin, polyamide resin, acrylic resin, silicone resin and the like. Among these, particularly preferable are vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl acetate-maleic acid copolymer, vinyl chloride-vinyl acetate-vinyl alcohol copolymer, and polyester resin.

As the organic low molecular weight substance, alkanol,
Alkanediol, halogenoalkanol, halogenoalkanediol, alkylamine, alkane, alkene, alkyne, halogenoalkane, halogenoalkene,
Halogenoalkyne, cycloalkane, cycloalkene,
Cycloalkynes, saturated or unsaturated mono- or dicarboxylic acids and their esters, amides or ammonium salts, saturated or unsaturated halogeno fatty acids and their esters, amides or ammonium salts, halogenoallylcarboxylic acids and their esters, amides or ammonium salts , Thioalcohols, thiocarboxylic acid polymers and their esters, amides or ammonium salts, carboxylic acid esters of thioalcohols, etc., having 10 carbon atoms.
-40 and a molecular weight of 100-700. Particularly preferred is a melting point of 50 to 150 ° C.
And higher fatty acids such as montanic acid, lauric acid, palmitic acid, stearic acid, arachidic acid and behenic acid, and their esters, amides and ammonium salts.

The mixing ratio of the organic high molecular weight substance and the organic low molecular weight substance is preferably 5 parts by weight to 200 parts by weight of the organic low molecular weight substance based on 100 parts by weight of the organic high molecular weight substance. It is preferably in the range of 10 to 100 parts. When the amount of the organic low molecular weight substance is less than 5 parts, the reversible thermosensitive recording layer is not sufficiently clouded and it is difficult to obtain contrast. On the other hand, if the amount is more than 200 parts, the film formability of the reversible thermosensitive recording layer will be deteriorated.

Further, in the present invention, in order not to adversely affect the printing device and to prevent the transparency from being lowered by repeated heating and cooling on the reversible thermosensitive recording layer side,
A protective layer can be provided on the side of the thermal recording medium that is heated by the printing device.

The form of the image formed by the printing device on the thermosensitive recording medium constituting the present invention is only required to have a transparency contrast between the image portion and the non-image portion so as to be visible through the display. Therefore, for example, the case where the image portion is the opaque portion and the non-image portion is the transparent portion, or the case where the image portion is the transparent portion and the non-image portion is the opaque portion can be applied to the present invention.

The printing apparatus constituting the present invention is for recording and erasing images having different degrees of transparency on the above-mentioned thermal recording medium, and at least a heating means such as a thermal head, a heating plate, a heat roll and a laser beam. It uses one. As a heating means for forming a clear image, it is preferable to use a thermal head or a laser beam. Further, when it is necessary to erase the entire image, a thermal head or a laser beam can be used, but it is more preferable to use a heat roll or a hot plate.

Printing and erasing may be performed by the same printing device, and printing and erasing may be performed by different printing devices.

Furthermore, regarding the positional relationship between the laminated structure of the printing device and the thermosensitive recording medium, the printing device and the reversible thermosensitive recording layer are arranged so that heat for printing does not disperse and hinders image formation. It is preferable that and are directly facing each other.

The light irradiating device constituting the present invention is for irradiating the above-mentioned thermosensitive recording medium with light, and includes a halogen lamp, a fluorescent lamp, a mercury lamp, a xenon lamp, a neon lamp,
A light emitting diode, a plasma luminous body, an EL luminous body, etc. can be used. It is also possible to use a reflecting mirror as shown in FIG. 1 in order to irradiate the heat-sensitive recording medium with light uniformly.

The display of the present invention is a display which transmits and scatters a certain amount of light, for example, a frosted glass-like one, a transparent film having fine scratches on its surface, and a transparent support. Examples include those coated with a light-scattering filler, and glass and film containing a light-scattering filler. Also, translucent paper such as tracing paper can be used.

[0026]

EXAMPLES The following paint was applied to one surface of a transparent polyethylene terephthalate film having a thickness of 75 μm and dried to form a reversible thermosensitive recording layer having a thickness of 6 μm. -Behenyl montanate 95 parts by weight-N, N'-distearyl dodecanedioic acid amide 5 parts by weight-Vinyl chloride-vinyl acetate copolymer 300 parts by weight-Tetrahydrofuran 1600 parts by weight Further, phosphazene on the reversible thermosensitive recording layer. A resin (made by Idemitsu Petrochemical: U-2000) was coated, and the coated surface was cured by ultraviolet rays to form a heat resistant protective layer having a thickness of 2 μm, to prepare a thermosensitive recording medium.

The heat-sensitive recording medium has a width of 21 cm and a circumference of 120.
cm-shaped belt to form an endless belt, and an applied pulse width of 2.0 msec and an applied energy of 0.
Opaque image (whitening) under the condition of 42 mj / dot
I went.

On the other hand, one surface of the display body made of frosted glass of A4 size was placed close to the thermal recording medium as shown in FIG. As the light irradiation device, one 10 W fluorescent lamp having a reflecting mirror on the back surface was used.

When viewed from the other side of the display body made of frosted glass, a dark image could be clearly observed on a light background. The image once recorded on the thermosensitive recording medium moves in the direction of the arrow in FIG. 1 at a moving speed of 20 mm / sec, and a heat roll (diameter 5 cm, set temperature 110
Completely erased by touching (° C) (transparent state)
Then, it became possible to print again. The image printing and erasing were repeated 200 times continuously, but the image visibility did not change.

[0030]

As described above, the heat-sensitive recording medium having the reversible heat-sensitive recording layer, the printing device, the light irradiation device and the display member are arranged at the above-mentioned predetermined places, and the transparency is imaged by the printing device. By irradiating the changed thermal recording medium with light from the light irradiation device and projecting the image on the light-transmissive and light-scattering display body, an extremely bright and dark image with excellent visibility can be obtained. Was completed.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a display device and a display method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light irradiation device 1-1 Halogen lamp 1-2 Reflector 2 Transparent support 3 Reversible thermosensitive recording layer 4 Thermosensitive recording medium 5 Printing device 5-1 Thermal head 5-2 Heat roller 6 Display 7 Light scattering layer 8 Visual recognition Person 9 Transparent part 10 Opaque part 11 Roller

Front page continuation (51) Int.Cl. ⁵ Identification number Office reference number FI Technical indication location G03C 5/56 8910-2H H04N 1/23 Z 9186-5C 6956-2H B41M 5/18 101 A (72) Invention Takeshi Suzuki, 3-1, Soba-machi, Shizuoka-shi, Shizuoka Prefecture, Tomoegawa Paper Co., Ltd. Electronic Materials Laboratory (72) Inventor Nagao Makino 3--1, Soba-machi, Shizuoka-shi, Shizuoka Prefecture In the laboratory

Claims (3)

[Claims] 1. A printing comprising a thermosensitive recording medium comprising a reversible thermosensitive recording layer whose transparency can be reversibly changed with temperature, and a heating means capable of imagewise changing the transparency of the thermosensitive recording medium. A device, a light irradiation device disposed on one side of the thermal recording medium, and a light-transmissive and light-scattering display disposed on the other side, and the surface of the thermal recording medium, A display device, wherein a surface of a display body is arranged close to each other. 2. A thermosensitive recording medium comprising a reversible thermosensitive recording layer whose transparency can change reversibly with temperature is formed with a printing device equipped with a heating means to form or erase an image, and the image is exposed to light. A display characterized by projecting image-like transmitted light obtained by irradiating light from an irradiation device onto one surface of a light-transmissive and light-scattering display body and visually recognizing a projected image from the other surface of the display body. Method. 3. A lens is provided at least between the light irradiation device and the thermosensitive recording medium, between the thermosensitive recording medium and the display, and between the display and the viewer. The display device and the display method according to claim 1 or 2.