JPS6319693A - Display unit - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention 1 by Gotoyo relates to a display device in which visual information is displayed at a predetermined display position.

A display device is known in which visual information is written on a film surface and displayed on a predetermined display window. Conventionally, such display devices used only one information display film, but a plurality of such information display films are prepared and, for example, different information is written on them so that they can be displayed at the same display position. If the visual information of one film is displayed at the same time, the amount of information displayed for the same display position increases, and the visual information of one film is left as it is, while the visual information of the other film is changed one after another and displayed simultaneously. It can have various polymorphic functions.

An object of the present invention is to provide a display device made in view of the above points.

3. In order to achieve the above object, the present invention provides a display device that has a surface to which visual information can be added and that allows a rotatably supported information display film to be stopped at a designated display position. The present invention is characterized in that a plurality of the information display films are provided, and the plurality of information display films are laminated at least at the display position.

The present invention will be explained below with reference to illustrated embodiments.

FIG. 1 is an enlarged view of an example of an information display film included in a display device according to an embodiment of the present invention.

The information display film 3 serves as an image display body for displaying image information and basically consists of a base material 1 that is colorless and transparent, and a heat-sensitive material 2 that is cloudy.

The image display body 3 is made by laminating a heat-sensitive material 2 made of a matrix material and an organic low-molecular substance on a film base material 1 such as transparent plastic.

By the way, thermochromic materials are known as materials that can reversibly become transparent or cloudy depending on heat-sensitive temperature, and in recent years, such materials themselves have been molded into films or made into base films. The situation is such that it can be made into a film by coating it on top.

The image display body 3 used in the apparatus of the present invention is made of such a constituent material, and the heat-sensitive material 2, which is the constituent body thereof, is as shown in FIG.

Specific temperature t. When it is heated above, it has a property that its light transmittance changes depending on the temperature.

That is, this heat-sensitive material has a temperature of t. It has two state transition temperatures t I, t 2 (t + < t 2) for higher temperatures, and after heating to 12 or more, 1. When cooled below, it becomes cloudy and reaches maximum light shielding state.

On the other hand, when the heat-sensitive material is heated to a temperature range from to to less than t1 and then cooled to below to, the heating temperature is t.

From 1. As the temperature increases, the white turbidity of the heat-sensitive material when cooled exhibits a continuous intermediate white turbidity from the maximum light shielding state to transparency.

Furthermore, after heating to a temperature range of t1 or more and less than t2,
Even when cooling to below t, as the heating temperature increases from 11 to t2, the white turbidity of the heat-sensitive material when cooled is:
It shows a continuous intermediate white turbidity from a transparent state to a maximum light-shielding state.

In FIG. 2, the solid line shows the light transmittance curve during heating, and the broken line shows the light transmittance curve after cooling (to or below).

By the way, with respect to the image display body 3 shown in FIG.
Alternatively, the heat-sensitive material 2 may be colored in a specific color. For example, when a red dye, pigment, etc. is dispersed in any layer, a predetermined image can be displayed with a slightly pale red part and a red transparent part. In addition, in such an example, without coloring the base material or heat-sensitive material,
A third colored layer can also be newly provided. Further, the image display body 3 basically consists of a base material 1 and a heat-sensitive material 2, but a surface protection layer, an antireflection layer, an intermediate adhesive layer, etc. may be provided in addition.

FIG. 3 shows an example of a display in which display bodies with different colors are duplicated. Note that in this example, the viewpoint is placed upward in the diagram.

The heat-sensitive material 2 is colored white, and the other heat-sensitive material 2' is colored red. Note that the hatched areas in 2 and 2' are cloudy areas, and the rest, including the base material 1, is transparent.

Here, a black background plate 4 is provided on the back of the display body, and when the display body with the background plate added is viewed from above in the figure, the cloudy part of the display body 3 is In this case, a white image can be seen regardless of the state of the display body 3' and the background plate 4.

On the other hand, when the display body 3 is transparent and the display body 3' is cloudy, it appears red due to the coloring material dispersed in the heat-sensitive material 2' of the display body 3'.

When the display bodies 3 and 3' are both transparent, the transmitted light is red, but if the background plate 4 is black, that red light will also be absorbed and almost no reflected light will be reflected. Parts appear black.

From this point of view, in the illustrated example, the colors are white and red.

This makes it possible to display images in three colors, including black.

Note that even if the color of the background plate 4 is cyan, it shows a tendency to absorb red light, so it will exhibit three colors in the same way.

FIG. 4 shows an example where the display body is triple-layered.

In this example, images can be displayed in four colors: white, yellow, red, and black. In this way, by appropriately combining the spectral transmittance characteristics of each display body, it is possible to display two or more colors.

In addition, as shown in FIGS. 3 and 4, the background plate 4 may be provided on the back of the display body or may be provided integrally on the back of the base material, or the base material itself may be used as the background plate. It may also be configured. In such a case, the base material 1 of the display body 3' is not limited to transparent plastic, but may be made of other materials including metal thin films.

FIG. 5 shows a specific example of the display device.

In the display device of this example, two information display films 3A, 3
B is used, and two-color display is possible.

Reference numeral IO designates a display window constituting the display position, 11 a reading section, 12A and 12B a writing thermal head, 1
3 is a pair of heat rollers for driving and erasing the information display film, 14 is a holder for small items such as markers and blackboard erasers,
The two information display films 3A and 3B are laminated at least at the display window 10, and a background plate 4 is provided on the back of the laminated film.

The two information display films 3A and 3B have the same circumferential length and are driven simultaneously by a pair of heat rollers 13 which also serve as a drive. Note that this driving may be performed separately.

After the information display films 3A and 3B uniformly erased by the heat roller pair 13 are naturally cooled, information is written on each information display film by the thermal heads L2A and 12B and visualized.

Signals to the thermal heads 12A and 12B are electrically transmitted from a device such as an image scanner or a facsimile via an interface (not shown). The information display film on which the visible image is written stops at the display window 10 at a certain timing, and is displayed there.

The display window 10 may be covered with a transparent material such as glass or plastic, but it may also be made open as shown in the figure. ) allows you to write information directly on the information display film.

When the information display films 3A and 3B are rotated after being displayed, the information image is read by the reading section 11. The reading unit 11 has a light source such as a fluorescent lamp and a mirror, and image information is transmitted to the CCD via this mirror, a lens, another mirror, etc.
The electrical signals from here are transmitted to devices such as printers.

The image on the information display film is erased again by the pair of heat rollers 13, but if necessary, the rollers are kept at a low temperature and the image is not erased, but another piece of information is written in the writing section again. Additional writing may be performed.

The embodiment shown in Fig. 5 is provided with a background plate 4, but this may be eliminated, or a suitable light source may be provided on the back side of the information display film as a transparent body for support, and the backlight from this may be utilized. It is also possible to use a system display device.

As a heat source for erasing, it is also possible to use a plate-shaped heater instead of the pair of heat rollers as shown. In this case, a heater will be provided separately from the g-movement roller. Furthermore, after heating this heater to a constant temperature at all times,
If the information display film is brought into contact with and separated from the information display film as necessary, the information display film will not be heated unnecessarily, and deformation and deterioration of the information display film can be prevented. moreover.

Since this is a method in which pressure is applied only when necessary, the temperature rise time of the heater can be generally ignored.

Thermal heads 12A, 12 with an information display film in between
If you install a heater in the part facing B,
When writing with a thermal head, the energy of the thermal head can be reduced, and the writing speed can be improved.

By the way, the embodiment shown in Fig. 5 uses two information display films to display two colors, but if three or more information display films are used, three or more colors can be displayed. This means that display can be performed.

As described above, by stacking monochromatic thermochromic display bodies, it is possible to display multiple colors, and it is also possible to realize a multicolor display function that could not be expected from conventional electronic blackboards.

In addition to such multicolor display, it is also possible to use multiple sheets of ordinary information display film, and add different image information to each film so that it can be seen with the naked eye. They may be displayed in a superimposed manner, and in this way, the amount of display information can be increased for the same display area.

According to the present invention, it is possible to provide a display device that can increase the amount of displayed information and perform a wide variety of displays.

[Brief explanation of the drawings] Figure 1 is an enlarged view showing the basic structure of the information display body, Figure 2 is a diagram showing the correlation between light transmittance of heat-sensitive material and heating temperature, and Figure 3 is a two-layer structure. FIG. 4 is an enlarged view of a three-layer structure display, and FIG. 5 is a configuration diagram of an example of a concrete display device. 3A, 3B... Information display film 10... Display window as display position (7)

Claims (3)

[Claims] (1) A display device that has a surface on which visual information can be added and is configured to stop a rotatably supported information display film at a designated display position, the display device including a plurality of said information display films. A display device comprising: a plurality of information display films, and a plurality of such information display films are stacked at least at the display position. (2) The display device according to claim 1, wherein the information display film has a thermochromic layer. (3) The display device according to claim 1, wherein each of the information display films is colored in a different color.