JPS62143020A - Display device - Google Patents

Abstract

PURPOSE:To reduce an applied voltage by providing a sheet having plural transparent band-shaped electrodes at a reflection-like position to each other so as not to contact a light transmissive porcelain, on the surface and the reverse side of the plate-shaped light transmissive porcelain having a Kerr effect of a voltage control, and applying simultaneously a voltage. CONSTITUTION:Every other electrode of a transparent band-shaped electrode group 3 is set to 'O'V, an optional voltage is applied to the remaining electrodes, and simultaneously, a pressure use head 6 is scanned, and a display state and a sorage state are caused. That it to say, by the pressure use head 6, a part of the band-shaped electrode group 3 is made to contact the surface and the reverse side of the PLZT plate 1, and a display state is caused by generating locally a potential difference on the PLZT plate 1. Subsequently, when the pressure use head 6 is made to scan in a stage that a potential remains applied to the band-shaped electrode group 3, a contact part of the band-shaped electrode plate 3 and the PLZT plate 1 moves, but a part of its locus becomes a storage state. Also, the band-shaped electrode group which has been provided on the surface and the reverse side of the plate-shaped light transmissive porcelain is placed in a reflection-like position, and a double refraction is caused by applying simultaneously a voltage, by which an applied voltage is reduced remarkably.

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, low-cost device that can directly record, display, retain, and erase information. The present invention relates to a power consumption display device.

Conventional technology In recent years, optical communications and advanced communication systems (INS).

Information and communication technologies such as value-added communication networks (VANs) are rapidly developing. With the accompanying shift to OA and HA, the development of information output terminal equipment 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. Furthermore, when driving the liquid crystal by matrix driving or the like, increasing the amount of information per screen increases the number of drive 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.
It solves the high cost, non-memory nature, need for maintenance, and non-rewritability of hard copies such as printers, and records the necessary information with sufficient image quality for the necessary time at low cost and low power consumption. .

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 configured above, has sheets having a plurality of strip-like electrodes 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. , while applying a signal to the strip electrode, applying pressure to any part of the sheet from the surface of the polarizing film placed on the front surface of the sheet to bring it into contact with the translucent porcelain; Display is performed by applying a potential difference to the parts to generate birefringence and changing the intensity of light through a polarizing plate. 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.

Furthermore, like the display device of the present invention, the band-shaped electrode groups provided on the front and back sides of the plate-shaped translucent porcelain are arranged in mirror positions with respect to each other,
By simultaneously applying voltage to the front and back sides of a plate-shaped translucent porcelain to cause birefringence, the applied voltage can be significantly reduced.

As a result, information can be directly recorded, displayed, held, and erased, and almost no power is consumed through writing, erasing, and holding information, resulting in 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, reference numeral 1 denotes a translucent porcelain having an electro-optic effect, and in this example, a composition (La/Zr /Ti=9/65
/35) was used. Transparent sheets 2 are placed on the front and back sides of the PLZT flat plate 1 so as not to contact the PLZT flat plate 1. 3 shows a group of transparent band-shaped electrodes formed on the transparent sheet 2, and the band-shaped electrode groups on the front and back sides are arranged at mirror positions with respect to the PLZT flat plate 1. 4 is PL
Polarizing films arranged on the front and back sides of the ZT flat plate 1 and the transparent sheet 2 are shown, and the polarization axis of each polarizing film is the same as that of the strip electrode group 3.
It is arranged at an angle of 45° to the longitudinal direction of. 5
is a reflective film, and in this example, aluminum was deposited on the back surface of the polarizing film 4 to produce it. 6 is each polarizing film 4
Pressure is applied to the transparent sheet 2 and the transparent band-shaped electrode group 3 from the surface of the PLZT flat plate 1, and a part of the transparent band-shaped electrode group 3 is attached to the PLZT flat plate 1.
This is a pressurizing head for contacting the 7 is a control circuit for giving a signal to the transparent band-shaped electrode group 3 and causing the pressurizing head 6 to scan.0 In this embodiment,
Every other electrode in the transparent band-shaped electrode group 3 was set to 0 (v), and a voltage was applied to any part of the other band-shaped electrodes. Further, the transparent band-shaped voltage electrode 3 produced in this example has an electrode width of 50 (μm) and an electrode spacing of 150 (μm).

The operation of the display device configured as described above 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.

(The state shown in FIG. 2(a)) In other words, display is possible. Next, as shown in Figure 2(b), when the switch is opened with voltage applied to the PLZT substrate, the PLZT
Birefringence generated in the ZT substrate is maintained. In other words, it becomes a memory state. This can be eliminated by short-circuiting the electrodes as shown in FIG. 3 (el).

Utilizing the characteristics of the PLZT element as described above, every other electrode in the transparent band-shaped electrode group 3 shown in FIG. 6 is scanned to cause the display state and storage state to occur. In other words, the pressurizing head 6 shown in FIG.
A part of the band-shaped electrode group 3 is brought into contact with the front and back sides of the PLZT flat plate 1, and a potential difference is locally generated on the PLZT flat plate 1 to cause a display state.
When the pressurizing head 6 is scanned while a potential is still applied to the band-shaped electrode group 3, the contact portion between the band-shaped electrode group 3 and the PLZT flat plate 1 moves, but the voltage is not applied to the part of the trajectory. The state in which it is opened after opening, that is, (b) in Figure 2
The state is the same as that of Therefore, it will be displayed as well as stored. In this example, the memory state was left at room temperature for 7 days, but the state did not change.

The information displayed and recorded in this way can be erased by setting all the voltages of the transparent strip electrode group 3 to 0 (ν) and scanning the pressurizing head.The display contrast of the display section in this embodiment is 20. That was it. Further, the optimum voltage applied to the band-shaped electrode group 3 during display is 100 (ν), which allows for significantly low voltage driving.

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 reflective structures.

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 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, and through all of these functions, almost no electricity is required. , which has the very great feature of being able to be driven at low voltage.

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 easy-to-use 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. 1...PLZT flat plate, 2...Transparent sheet, 3...Transparent strip electrode group, 4...Polarizing film, 5...Reflection Membrane, 6... Pressure head, 7... Control circuit. /---PLZT child 4 good 2-m-transparent sheet 3--Ichiaki Akira t & rod 4--Ichiyaru film δ-L ash 6---Head for sword roll Fig. 1 7-kai ]Multi-p circuit diagram 2

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
2. The display device according to claim 1, wherein the display device is arranged in a mirrored position with respect to the plate-shaped translucent porcelain.