JPS62143019A - Display device - Google Patents

Abstract

PURPOSE:To execute direct recording, display, holding, and rewriting of information by a low power consumption, by providing a plate-shaped light transmissive porcelain having a polarizing plate on the surface, and a sheet having plural band-shaped electrodes so as not to contact its porcelain, on the reverse side of its porcelain. 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 made to scan, and a display state and a storage state are caused. That is to say, by the pressure use head 6, a part of the band-shaped electrode group 3 is brought to contact the reverse side of a 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 state that a potential remains applied to the band-shaped electrode group 3, a contact part of the band-shaped electrode group 3 and the PLZT plate 1 moves, but a part of its locus becomes a storage state. Accordingly, it is displayed, and also stored.

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 W4 (VAN) have been 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, flat-panel displays using liquid crystals, etc., allow devices to be made smaller, but display quality is poor (and the amount of information per screen is small. Also, when driving liquid crystals using matrix drive etc. Increasing the amount of information on one 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 display images.

Means for Solving the Problems In order to solve the above-mentioned problems, the display device of the present invention includes a plate-shaped transparent porcelain having a voltage-controlled Kerr effect and having a polarizing plate on its surface; A sheet having a plurality of strip-shaped electrodes arranged on the back side of the porcelain so as not to contact the porcelain, and applying pressure to any part of the sheet from the back side of the sheet, the translucent porcelain and the sheet are heated. It is constructed from a pressurizer that can bring the two into contact with each other.

Effects of the present invention, as in the above configuration, a sheet having a plurality of strip electrodes is placed on the back surface of a plate-shaped translucent porcelain having a voltage-controlled Kerr effect so as not to come into contact with the translucent porcelain, Said strip 1! While applying a signal to the rod, pressure is applied to any part of the sheet from the back side of the sheet to bring it into contact with the translucent porcelain, and a potential difference is applied to any part of the translucent porcelain to generate birefringence. Display is performed by 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,
This means that 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.

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 =9/65/3
5) was used. 2, on the PLZT flat plate l flat plate surface,
PLZT flat plate is a transparent sheet arranged so that it does not face flat. 3 indicates a group of transparent band-shaped electrodes formed on the transparent sheet 2. As shown in FIG. 4 indicates a polarizing film,
In this example, in order to increase the contrast, the polarizing films were placed on the front and back sides of the PLZT flat transparent sheet 2. Further, the polarization axis of each polarizing film is arranged at an angle of 45° with respect to the longitudinal direction of the band-shaped electrode group 3. 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 from the back surface of the reflective film 5,
This is a pressure head for applying pressure to the transparent sheet 2 and the transparent band-shaped electrode group 3 to bring a part of the transparent band-shaped electrode group 3 into contact with the PLZT flat plate 1. 7 is a transparent strip electrode group 3
This is a control circuit for giving signals to the pressurizing head 6 and scanning the pressurizing head 6. In this example, every other electrode in the transparent band-shaped electrode group 3 was set to O(v), and a voltage was applied to any part of the other band-shaped electrodes. Moreover, the transparent band-shaped voltage electrode 3 produced in this example had a winding width of 50 (μm
), and the electrode spacing was 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 a counter electrode is formed on a PLZT substrate and a voltage is applied between the electrodes, birefringence occurs in the PLZTi plate. Therefore, if polarizing films are placed above and below the PLZT substrate, the areas where birefringence occurs and the other areas q can be bright and dark.

(The state shown in Figure 2 (8)) In other words, when the switch is opened with a 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, every other electrode of the transparent band-shaped electrode group 3 shown in FIG.
As such, a voltage is arbitrarily applied to the remaining electrodes, and at the same time, the pressurizing head 6 is scanned to cause a display state and a memory state. That is, a part of the band-shaped electrode group 3 is brought into contact with the back surface of the PLZT flat plate 1 using the pressurizing head 6 shown in FIG. cause to happen.

Next, when the pressure head 6 is scanned while the potential remains applied to the band-shaped electrode group 3, the band-shaped electrode group 3 and PL
The contact part of the ZT flat plate 1 moves, but its trajectory is
After a voltage is applied, it becomes open, which is the same state as (bl) in FIG.

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 (v) and scanning the pressurizing head.The display contrast of the display section in this embodiment is 10. That was it. Further, the optimum voltage applied to the band-shaped electrode group 3 during display was 200 (V).

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 a plate-shaped translucent porcelain having a polarizing plate on the surface and a voltage-controlled Kerr effect, and a plate-shaped translucent porcelain having a polarizing plate on the back surface of the translucent porcelain to prevent contact with the porcelain. a sheet having a plurality of strip-shaped electrodes arranged on the sheet, and a pressure head capable of applying pressure to any part of the sheet from the back side of the sheet to bring the translucent porcelain and the sheet into contact. It is a display device with a built-in display device that can directly record, display, hold, and rewrite information, which was not possible with conventional display 'Al, and all of these functions require very little electricity. It has great characteristics. 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. 1...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 /---P
LL lower + 2--Ichitomon Sheet 3--Ichigo Shoushi Selection House Figure 1 4-#1g Clothes 5---, Sha,! R month - 6 - - ttoL punishment head upper head - mourning 17 troubles Figure 2

Claims (2)

[Claims] (1) A plate-shaped translucent porcelain having a voltage-controlled Kerr effect with a polarizing plate on its surface, and a plurality of strip-shaped electrodes arranged on the back surface of the translucent porcelain so as not to contact the porcelain. A display device comprising a sheet and a pressure head capable of applying pressure to any part of the sheet from the back surface of the sheet to bring the translucent porcelain and the sheet into contact. (2) The display device according to claim 1, wherein the sheet is composed of a transparent band-shaped electrode group and a polarizing film having a reflective film.