JPS5829494B2 - Image storage display method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image storage and display method, in particular, a method in which an optical semiconductor layer such as amorphous selenium is provided on a transparent conductive substrate, and a transparent conductive film is attached to one surface of a ceramic solid solution. and
The present invention relates to a method of accumulating and displaying images using a corona charger.

Conventionally, as an image storage display method, as shown in FIG.
Pb(1-x)Lax(Zr(1-y)Tiy)t-
``The compositional transformation phase boundary (
Morphotropic Phase Bounda
A DC voltage is applied between both electrodes 1 and 4 in an element formed by stacking a ceramic solid solution 3 having a ceramic solid solution 3 having a nylon rye and a transparent electrode 4, and in this state image exposure 5 is performed from the transparent electrode 1 side as shown in FIG. A method of storing and displaying images is known.

In this way, the ceramic solid solution 3' corresponding to the bright part of the optical image undergoes a phase transition to a light scattering state, and the ceramic solid solution 3'' corresponding to the dark part remains transparent, so that an accumulated image is created.

The stored image thus created can be made into a negative or positive image using either a transmissive or reflective readout mechanism.

In addition, the accumulated image created in this way is produced by uniformly exposing the transparent electrode 1 to light 6 and then alternately passing an in-plane current of about 100 Hz through the transparent electrode 4 on the surface, as shown in FIG. It can be erased by heating.

In the conventional image storage and display method described above, since the erasing means is thermal erasure using phase transition, the optical semiconductor layer 2 is made of a substance such as selenium, which has high sensitivity but crystallizes at a relatively low temperature. In addition to being unusable, when creating a positive image from a positive image, the projected image is formed using scattered light, which has the disadvantage that the brightness is significantly reduced.

The present invention was made in view of the above-mentioned circumstances, and its purpose is to be able to use a substance that is highly sensitive but crystallizes at a relatively low temperature as an optical semiconductor layer, and to create a positive image from a positive image. An object of the present invention is to provide an image storage and display method that can reduce the reduction in brightness when images are displayed.

The present invention will be described in detail below with reference to FIG. 4 and subsequent figures.

FIG. 4 shows members used in the image storage and display method according to the present invention. A first member A includes a transparent electrode 9 provided with a transparent conductive film 8 on a glass substrate 7 and an optical semiconductor layer 10 provided thereon.
and ceramics Pb(1x)Lax(Zr(1-y)Tiy)1-LQ in which La is added to Pb(Zr,Ti)OJ solid solution.
Ceramic solid solution 11 (hereinafter abbreviated as PLZT) having a compositional transformation phase boundary whose composition changes little with respect to temperatures such as 3
It consists of a second member B having a transparent conductive film 12 on one side thereof, and a charging member C such as a corotron charger.

Next, a method of storing and displaying images using the members A, B, and C described above will be explained.

First, as shown in FIG. 5, the charging member C is moved along the optical semiconductor layer 10 of the first member A to place charges 13 on the optical semiconductor layer 10.

Next, as shown in FIG. 6, image exposure 14 is performed from the glass substrate 7 side.
Then, only the charges 13 corresponding to the dark portions of the optical image remain on the optical semiconductor layer 10.

Thereafter, as shown in FIG. 7, the first member A is superimposed on the second member B, and a voltage is applied to both electrodes 8 and 12.

In this way, the PLZT corresponding to the charge remaining portion 13'
11' transitions to a light-scattering state while the others remain in the transparent phase 11'', thus forming an accumulated image on PLZTll.

Even if the second member B is separated from the first member A, the accumulated image is stored in the PLZTll, so that the PLZTll is stored in the PLZTll by a transmission type readout mechanism consisting of a readout light 14, a lens 15, and a display section 16 as shown in FIG. The stored images can be read out.

Also, to erase the accumulated image of PLZTli, place the second member B on the conductive flat plate 17 as shown in FIG.

The PLZTll can be reused because it is erased by passing a current through the transparent conductive film 12 to generate Joule heat.

Next, a specific example will be explained.

A first member A is formed by vacuum-depositing amorphous selenium to a thickness of 10 to 30 μm on a Nesa glass substrate 9 to form an optical semiconductor layer 10 .

On the other hand, PLZT7.6/70/30 was polished into a thin plate with a thickness of 200 μm, and the surface was coated with I n 03 S n
A transparent conductive film 12 having a resistance of about 10 Ω/hole was formed by high-frequency sputtering of the solid solution of No. 02 to form a second member B.

Terminals for passing current are made on the surface by vapor-depositing chromium and gold.
Connect the lead wires.

First, the Nesaglass conductive film 8 is grounded, and the amorphous selenium 10 is charged 13 to about -200V using a corotron charger C.

Next, imagewise exposure is performed from the back side to leave an imagewise electrostatic charge pattern on the surface of the amorphous selenium 10.

Thereafter, a second member B is placed on the first member A with the conductive surface facing up.
When a voltage of about +50 V is applied to the surface electrode 12, an accumulated image formed by a light scattering phase and a transparent phase is PLZTll.
can be obtained.

Then, the second member B can be separated and used as a display element.

FIG. 10 is an explanatory diagram in which the second member B having the accumulated image obtained in this way is applied to a copying machine, and the P of the second member B is
The accumulated image created on the LZTi 1 is formed on the photosensitive drum 21 by the lens 20 through the writing light source 18 and the condenser lens 19, and then transferred to the paper 24 through the development process 22 and the transfer process 23, and the accumulated image is transferred to the paper 24. It can be copied to 24.

By doing so, it is possible to make a larger number of copies than the stored image created in PLZTll, and it is also possible to reduce the power consumption of the copying machine.

Since the present invention is configured as described above, a light scattering image corresponding to the optical image can be obtained on the ceramic solid solution layer 11, and the accumulated image will not be erased even if the ceramic solid solution layer 11 is separated and independent.

Therefore, since heat resistance is not required for the optical semiconductor layer 10, it is possible to use a substance such as amorphous selenium which has high sensitivity but crystallizes at a relatively low temperature, and the ceramic solid solution layer 11 can be separated and independently imaged with transmitted light. can be reproduced, the attenuation of the brightness of the readout light can be made extremely small, and the decrease in brightness can be reduced when creating a positive image from a positive image.

[Brief explanation of the drawing]

Figure 1 shows an element used in a conventional image storage and display method, Figure 2 is a schematic diagram of the operation of a method for storing and displaying images using the element, and Figure 3 shows an image created using the method shown in Figure 2. FIG. 4 is an explanatory diagram of each member used in the image storage and display method according to the present invention. FIGS. 5 to 7 are explanatory diagrams showing the method according to the present invention in the order of steps. FIG. FIG. 9 is an explanatory diagram of the readout configuration of an image created by the method according to the present invention, FIG. 9 is an explanatory diagram of erasing the image, and FIG. 10 is an explanatory diagram of application to a copying machine. 9 is a transparent electrode, 10 is an optical semiconductor layer, 11 is a ceramic solid solution layer, and 12 is an electrode.

Claims (1)

[Claims] 1 After charging the optical semiconductor layer 10 provided on the transparent electrode 9, image exposure is performed, and then a ceramic solid solution layer 11 with an electrode 12 provided on the back surface is stacked on the optical semiconductor layer 10, and a layer is formed between both electrodes 9 and 12. By applying a voltage, the ceramic solid solution layer 11
1. An image accumulation and display method characterized by forming a light scattering accumulation image corresponding to a light image within a display.