JPS626219A - Display device - Google Patents

Abstract

PURPOSE:To record, display, holds, and rewrite information directly almost without any electric power by arraying beltlike light transmissive ceramics having Kerr effect, generating a potential difference between optional local places on the surface of an adhered flat plate by a head for voltage application and causing birefringence, and displaying the information. CONSTITUTION:Beltlike PLZT ceramics 1 are connected mutually by adhesive layers 2, facing electrodes are formed on the PLZT substrate, and a voltage is applied between the electrodes to cause the birefringence of the PLZT substrate. For the purpose, polarizing films are arranged on both surfaces of the PLZT substrate to form a light and shade pattern between parts where the birefringence is caused and other parts, thus making a display. When a switch is opened while the voltage is applied to the PLZT substrate, the birefringence of the PLZT substrate is maintained and a storage state is entered. A head scanning drive part 4 scans the head to give a potential difference to an optional part on the PLZT substrate and causing a display state. The data is erased by scanning the head 3 for voltage application 3 over the entire PLZT substrate 1 while holding the voltage at zero V, or rubbing conductive rubber or a finger against the surface of the PLZT substrate 1.

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) have become popular.

Information and communication technologies such as value-added communication networks (VANs) are rapidly developing. As a result of this trend, the development of information output terminal equipment is attracting a lot of attention due to the reduction in the number of people to zero and the number of people. Currently, output terminal devices that are being used and are being actively developed are printers and copying machines represented by displays such as CRTs and liquid crystal displays.

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 and 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 a liquid crystal by matrix driving or the like, increasing the amount of information per screen increases the number of driving circuits, resulting in extremely high costs.

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 information has been output, a note 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, information can be rewritten, but they do not have memory of their own, and the information capacity per screen is insufficient, and like printers, information cannot be recorded and retained. Although it is easy, there are some things that require maintenance and cannot be rewritten. However, there is nothing that combines both functions.

The present invention solves the poor image quality, high cost, and non-memory nature of soft copies such as CRTs, and the need for maintenance and non-rewritability of hard copies such as printers. Record and display information in sufficient image quality for the required amount of time.

The present invention relates to a display device that can be held and rewritten.

Means for Solving the Problems In order to solve the above problems, the display device of the present invention uses a flat plate made by arranging strip-shaped translucent porcelain having a voltage-controlled Kerr effect in one direction and bonding them together. The present invention has a structure in which a voltage applying head is used to apply a potential difference to the surface of Then, a voltage applying head applies a potential difference between arbitrary locations on the surface of the bonded flat plate to cause birefringence, thereby displaying information. Furthermore, the voltage application head or the translucent porcelain is scanned to electrically open the potential of the part where birefringence has occurred, the displayed information is saved, and the surface of the translucent porcelain is electrically opened. Erasing is performed by short-circuiting the data. This allows for direct recording and display of information.

It can be held and erased, consumes almost no power during writing, erasing, and holding information, and has a very simple configuration. In addition, as mentioned above, by arranging the band-shaped translucent porcelain in one direction and adhering it to the substrate,
The planographic plate described above can be given flexibility, and a display board with a large area can be easily constructed.

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 band-shaped translucent porcelain having an electro-optic effect, and in this example, lead zirconate titanate (PI, ZT) added with lanthanum is used.
composition with a large Kerr effect (La/Zr/Ti = 9/6
5/35) was used. 2 is a strip-shaped PLZT porcelain 1
This is the adhesive layer that connects the two to each other. 3 is the above PLZT
It is a voltage application head that can locally apply a potential difference on the surface of porcelain, and 4 is a voltage application head 3,
It shows a head drive unit that can scan arbitrarily in the X-Y directions. Reference numeral 6 indicates polarizing plates disposed above and below the PLZT ceramic 1 and the head scanning drive unit.

In this example, the polarizing plates 6 were arranged so that their respective polarization axes were in the same direction (parallel Nicols).

The above strip-shaped PLZT plate is 80 x 20 tt.
x, a plurality of PLZT sintered bodies with a thickness of 2 mm are precisely aligned and bonded on a glass substrate, grooves are mechanically formed in one direction, resin is poured and hardened, and the thickness is 200
It was created by slicing with 11tn and polishing both sides. In this example, the width of the strip-like PLZTO was 300 μm, and the thickness of the adhesive layer was 100 μm. FIG. 2 shows a structural diagram of the voltage application head section shown in FIG. 1. In FIG. 2, 6 is a flexible sheet, and in this example, a polyimide resin sheet was used. 7 is a reinforcing plate for fixing the polyimide resin sheet 6, and 8 is a group of electrodes formed on the sheet 6. The formed electrode is
The electrode width is 100 μm, and the electrode spacing is 200 μm.

Reference numeral 9 indicates a lead wire for applying a voltage to each electrode of the electrode group 8.

The operation of the display device configured as described above will be described below.

FIG. 3 shows PLZT in a display device according to the present invention.
FIG. 3 is a principle diagram for explaining the function of the element. As shown in FIG. 3, 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 a PLZT substrate, brightness and darkness can be created between the areas where birefringence occurs and the other areas. (Status of the 3rd device) This means that it can be displayed. Next, as shown in Figure 3, when the switch is opened with voltage applied to the LZT board, the PL
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. 3C.

Utilizing the characteristics of the PLZT element as described above, every other electrode in the electrode group 8 of the voltage application head shown in FIG. 1
The head scanning drive unit shown in the figure causes the head to scan and cause the display state and storage state to occur. In other words, the voltage application head 3 shown in FIG.
A display state is caused by applying a potential difference to any part of the T-substrate. Next, when the head is scanned with the voltage applied to the voltage application head 3, the trajectory will be the same as the state where the voltage is applied and then opened (the state shown in Figure 3). A state of memory can be achieved. In this example, the memory state was left at room temperature for 20 days or more, but the state did not change. The information displayed and recorded in this way can be obtained by scanning the PLZT substrate 1 with all the voltages of the voltage application head 3 set to OV, or by rubbing the surface of the PLZT substrate 1 with conductive rubber or a finger. It can be erased by Also, like the configuration of this embodiment shown in FIG.
The display contrast in the case of transmissive display was 20 or more.

In the embodiment of the present invention, a transmissive type display device is used, but in the configuration shown in FIG. 1, the PLZT substrate 1
It is clear that a reflective type structure in which a reflective film is provided on the back surface and the polarizing plate 6 on the back surface is removed has the same function, and is not limited to a transmissive type structure.

Effects of the Invention As described above, the present invention applies a potential difference to the surface of a flat plate made by arranging and bonding band-shaped translucent porcelain having a voltage-controlled Kerr effect in one direction using a voltage applying head. It is a display device that has a configuration that provides information, and is capable of directly recording, displaying, retaining, and rewriting information, which was not possible with conventional display devices, and all of these functions require almost no electricity. It has very great features. Further, the display device of the present invention can be realized as a system with a very simple configuration and has sufficient display quality. Furthermore, by arranging strip-shaped translucent porcelain in one direction and adhering them to the substrate, the flat plate can be made flexible, and a large-area display board can be easily constructed. becomes.

Such a display device is highly desired as a simple information output terminal in a highly information-oriented society that will continue to develop in the future, and its effects are significant.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of a display device according to the present invention, and FIG.
The figure is a block diagram showing the structure of the voltage application head section in FIG. 1, and FIGS. 3a, b, and c are diagrams for explaining the principle of the display device according to the present invention. 1... PLZT substrate, 2... adhesive layer,
3... Head for voltage application, 4... Head scanning drive unit, 6... Polarizing plate, 6...
Flexible sheet, 7... Reinforcement plate, 8...
... Electrode group, 9... Lead wire. Name of agent: Patent attorney Toshio Nakao and one other person f.
・・Ph3-4・・HetsuF°Length measurement moving part 5・・#J light plate 2nd figure 3rd figure νtsuchi

Claims (2)

[Claims] (1) Applying a potential difference using a voltage applying head to the surface of a flat plate made by arranging band-shaped translucent porcelain having a voltage-controlled Kerr effect in one direction and bonding them with a flexible adhesive,
A display device characterized in that the intensity of light transmitted through a polarizing plate placed in front of the flat plate is changed. (2) The display device according to claim 1, wherein the voltage application head has at least one pair of electrodes and scans over a flat plate.