JPS62143021A - Display device - Google Patents

Abstract

PURPOSE:To increase the number of dots of a character which has been displayed and recorded, and to improve the resolution by placing a band-shaped electrode group which has been formed on a transparent sheet of the surface and the reverse side, so that it is not superposed in a reflection-like position with regard to a plate-shaped light transmissive porcelain. CONSTITUTION:The number of dots of a character which has been displayed and recorded is increased, and the resolution is improved by placing a band- shaped electrode group 3 which has been provided on the surface and the reverse side of a plate-shaped light transmissive porcelain 1, so that it is not superposed to each other in a reflection-like position. In this way, direct recording, display, holding and erasing of information can be executed, the power is scarcely consumed, and the constitution is also simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is effective when used as an information output terminal device, and is a very simple, low-cost, and low-cost device that can directly record, display, retain, and erase information. The present invention relates to a power consumption display device.

BACKGROUND OF THE INVENTION In recent years, information and communication technologies such as optical communication, advanced communication systems (INS), and value-added communication (VAN) have been rapidly developing. With the accompanying shift to OA and HA, the development of information output terminals is attracting much attention. Currently, the output terminal devices that are being used and are being actively developed are soft copies represented by displays such as CRTs and liquid crystal displays, and hard copies such as printers.

CRTs and LCD displays do not have a memory function of their own, so if you want to keep the output information displayed for the required amount of time, you must leave the power on, which consumes less power. I need. Furthermore, CRT displays are large devices that are difficult to carry. On the other hand, a flat display using liquid crystal or the like allows the device to be made smaller, but the display quality is poor and the amount of information per screen is small. Further, when driving the liquid crystal by matrix driving or the like, increasing the amount of information per screen increases the number of driving circuits, resulting in a very high cost.

On the other hand, output devices such as printers have sufficient information capacity and resolution, and can directly record and retain information, but
Maintenance of ink, toner, etc. is required, and
Once the information has been output, the hard copy cannot be played back.

Problems to be Solved by the Invention As mentioned above, conventional information output terminal devices include CRT,
Like LCD displays, which can rewrite information, but have no memory of their own, and the information capacity per screen is insufficient, and like printers,
Although it is easy to record and maintain information, there are some things that require maintenance and cannot be rewritten. However, there is nothing that combines both functions.

The present invention addresses the problem of poor image quality caused by soft copies such as CRTs.
Solving the high cost and non-memory nature, the need for maintenance and non-rewritability of hard copies such as printers,
Get the information you need, in the time you need, with low cost and low power consumption.
Records with sufficient image quality.

The present invention relates to a display device that can display, hold, and rewrite data.

Means for Solving the Problems In order to solve the above-mentioned problems, the display device of the present invention has a transparent plate having a plurality of transparent strip-like electrodes on the front and back sides of a plate-like translucent porcelain having a voltage-controlled Kerr effect. A sheet is arranged so as not to come into contact with the translucent porcelain, and polarizing films are provided above and below, and pressure is applied to any part of the sheet from the surfaces of the two polarizing films with a pressure head. The structure is such that the front and back surfaces of the translucent porcelain are brought into contact with the sheet.

Function The present invention, as in the above configuration, arranges sheets having a plurality of strip-shaped electrodes on the front and back sides of a plate-shaped translucent porcelain having a voltage-controlled Kerr effect so as not to contact the translucent porcelain, While applying a signal to the strip-shaped electrode, pressure is applied to any part of the sheet from the surface of the polarizing film arranged on the front surface of the sheet to bring it into contact with the translucent porcelain, and the desired part of the translucent porcelain is brought into contact with the translucent porcelain. A potential difference is applied to generate birefringence, and the intensity of light is changed through reversal of polarization to perform display. Furthermore, by returning the pressurizing part to its original state, the strip electrode and the translucent porcelain come out of contact, and the potential can be maintained. In other words, the displayed information can be retained. In addition, the display can be erased by applying pressure to the displayed area and bringing the sheet into contact with translucent porcelain, without applying voltage to the strip electrode.

In addition, as in the display device of the present invention, by arranging the band-shaped electrode groups provided on the front and back sides of the plate-shaped translucent porcelain so that they do not overlap each other in the mirrored position, the band-shaped electrodes do not cause birefringence. The contact area can also generate birefringence from either the front or the back, improving display resolution.

This allows information to be directly recorded, displayed, held, and erased, consumes almost no power through writing, erasing, and holding information, and has a very simple configuration.

Embodiments Hereinafter, display devices according to embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a configuration diagram of a display device in an embodiment of the present invention. In FIG. 1, ■ is a translucent porcelain having an electro-optic effect. =9/65/3
5) was used. 2 is a PLZT flat plate l flat plate dust, P
LZT flat plate is a transparent sheet arranged to prevent dust. 3 shows a transparent band-shaped electrode group formed on the transparent sheet 2, and the band-shaped electrode groups on the front and back are formed on the PLZT flat plate 1.
They are arranged so that they do not overlap each other in a mirrored position. 4 indicates polarizing films arranged on the front and back sides of the PLZT flat plate 1 and the transparent sheet 2, and the polarization axis of each polarizing film is 45 mm with respect to the longitudinal direction of the strip electrode group 3.
It is placed at an angle of °. Reference numeral 5 denotes a reflective film, and in this example, aluminum was deposited on the back surface of the polarizing film 4 to produce it. 6 is a pressure head for applying pressure to the transparent sheet 2 and the transparent band-shaped electrode group 3 from the surface of each polarizing film 4 and touching a part of the transparent band-shaped electrode group 3 to the PLZT flat plate. be. Reference numeral 7 denotes a control circuit for applying a signal to the transparent band-shaped electrode group 3 and causing the pressurizing head 6 to scan. In addition, the transparent strip-shaped voltage electrode 3 produced in this example
is electrode 8 width 100 (μm), electrode spacing 100 (μm)
The operation of a display device configured as 0 or more will be described below.

FIG. 2 shows the PLZ in the display device according to the present invention.
It is a principle diagram for explaining the function of a T element. As shown in FIG. 2, when opposing electrodes are formed on a PLZT substrate and a voltage is applied between the electrodes, birefringence occurs in the PLZT substrate. Therefore, if polarizing films are placed above and below the PLZT substrate, brightness and darkness can be created between the birefringent area and the other areas.

(Figure 2 (al state)) In other words, display is possible.Next, as shown in Figure 2 fbl, when the switch is opened with voltage applied to the PLZT board, the PLZT
Birefringence generated in the ZT substrate is maintained.

In other words, it becomes a memory state. This can be eliminated by shorting the electrodes as shown in FIG. 3 (C1).

Utilizing the characteristics of the PLZT element as described above, a voltage is applied to each electrode of the transparent band-shaped electrode group 3 shown in FIG. The pressure head 6 is scanned to cause a display state and a memory state to occur. That is, the pressure head 6 shown in FIG.
The above-mentioned PLZ'
A display state is caused by locally generating a potential difference on the T-plate 1.Next, when the pressing head 6 is scanned while the band-shaped electrode group 3 remains at a potential, the band-shaped electrode Group 3 and the PLZT flat plate portion move, but the part of the trajectory is in an open state after voltage is applied,
In other words, the state is the same as that of (bl) in FIG. There was no change.In this way, the displayed and recorded information was obtained by setting the voltage of the transparent strip electrode group 3 to 0 (V).
The display contrast of the display unit in this embodiment is 20, which can be erased by scanning the pressure head.
That was it. Further, the optimum voltage applied to the band-shaped electrode group 3 during display was 150 (V).

Furthermore, as in the configuration of this embodiment, by arranging the transparent band-shaped electrode groups 3 on the front and back sides of the PLZT flat plate 1 so that they do not overlap each other in mirrored positions, the number of dots of displayed/recorded characters can be reduced. It was possible to obtain a display with good resolution.

In the embodiment of the present invention, a reflective display device is used, but it is clear that a transmissive structure with the structure shown in FIG. 1 except for the reflective film 5 has the same function. It is not limited to a reflective structure.

Effects of the Invention As described above, the present invention provides transparent sheets having a plurality of transparent strip-like electrodes on the front and back sides of a plate-shaped translucent porcelain having a voltage-controlled Kerr effect so as not to come into contact with the translucent porcelain. and a polarizing film is provided on the top and bottom of the sheet, and pressure is applied to any part of the sheet using a pressure head from the surfaces of the two polarizing films to separate the front and back surfaces of the translucent porcelain and the sheet. It is a display device that is configured to make contact with the display device, and is capable of directly recording, displaying, retaining, and rewriting information, which was not possible with conventional display devices. This device has a very significant feature of being able to display the following information.

Further, the display device of the present invention can be realized as a system with a very simple configuration and has sufficient display quality.

It is thought that the need for such display devices will increase as simple information output terminals in the increasingly advanced information society.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a display device according to the present invention, and FIG. 2 is a schematic diagram for explaining the principle of the display device according to the present invention. ■...PLZT flat plate, 2...Transparent sheet, 3...Transparent strip electrode group, 4...Polarizing film, 5...Reflection Membrane, 6... Pressure head, 7... Control circuit. Name of agent: Patent attorney Toshio Nakao / ---
PLZTv-board 2--Series of Akira sheets J--Ichioi Akira f Kumo 3 scales 4-11 Yuru pusil Figure σ---Reflection narrow 6
--- Katana r: IL Hezuto 7-11 system Oshimegarito

Claims (2)

[Claims] (1) A transparent sheet having a plurality of transparent band-shaped electrodes is arranged on the front and back sides of a plate-shaped translucent porcelain having a voltage-controlled Kerr effect so as not to come into contact with the translucent porcelain, and a polarizing film is placed on the top and bottom of the plate-shaped translucent porcelain. A display characterized in that the front and back surfaces of the translucent porcelain are brought into contact with the front and back surfaces of the translucent porcelain by applying pressure to any part of the sheet using a pressure head from the surfaces of the two polarizing films. Device. (2) The band-shaped electrode groups formed on the front and back transparent sheets are
The display device according to claim 1, wherein the display device is arranged so as not to overlap each other in a mirrored position with respect to the plate-shaped translucent porcelain.