JPS6234187A - Display unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a low power consumption, inexpensive display device suitable for displaying on a large screen.

[Original technology]

Conventional Daisei display devices of this type have constructed a large screen by connecting a large number of CRTs or a large number of liquid crystal display panels.

[Problem that the invention seeks to solve]

However, the display system using the CRTtt has problems in that the image signal dividing circuit is complicated, the CRT itself is deep and heavy, and it is also expensive. Furthermore, the method using liquid crystal display boards has the problem that the structure is complicated and expensive because a large number of display boards are connected.

The present invention has been made to eliminate these drawbacks, and an object of the present invention is to provide a display device that can display a large size with a simple configuration.

[Means for solving problems]

The present invention provides such a display and device using an electrochromic medium.

It consists of a writing electrode that controls the flow of corona ions to write an electrostatic image on the electrochromic medium.

[Effect]

In this invention, when an electrostatic image is formed on the electrochromic medium by scanning the electrochromic medium with a write electrode, the electrochromic medium is colored by the electric field generated from this electrostatic image.

〔Example〕

FIG. 1 is a schematic diagram showing an embodiment of the present invention. In this figure, reference numeral 10 denotes a write electrode, which controls the flow of corona ions generated from the corona wire 11. Note that 12 is a shield case, and 13 is a write electrode control @omitted.

Reference numeral 20 denotes an electrochromic medium, which is mainly composed of a transparent substrate 21 and an electrochromic layer 22, the details of which will be described later. 2
2A shows a region colored due to the electric field. Write electrode 1
0 controls corona ions generated from the corona wire 11. The corona wire 11 is a gold-plated tungsten wire with a diameter of 60 to 120 μm, and a positive or negative voltage of 4 KV to 10 KV is applied to generate corona ions. The passage of corona ions through the writing electrode 10 is controlled by a principle as shown in FIGS. 2(a) and 2(b).

In FIGS. 2(a) and 2(b), the 10 writing electrodes are configured such that an upper electrode 10& and a lower electrode 10 are arranged at a predetermined interval, and a corona ion flow can pass through a hole provided in the center. ing. 14 is a high-voltage power supply, and 15 is a control power supply, which is supplied according to control from the write electrode control circuit 13 of FIG. 1. 16 is a bias power supply. Also 1
T is a transparent substrate, and 18 is a transparent conductive layer thereon.

Next, the operation will be explained.

When the control source 15 is applied so that the upper electrode 10m side becomes + and the lower electrode 10b@ becomes - as shown in Figure 2 (a),
The electric field becomes forward and the corona ions pass through, as shown in Figure 2 (b
), corona ions cannot pass through. Writing the electrostatic image on the above-mentioned thick substrate T-pole 10 and electrochromic layer 2
2nd Ell! forms an image and develops color. The colored image can be seen as a displayed image when viewed from the side of the transparent substrate 17 made of glass or the like.

To erase the displayed image, apply a potential of opposite polarity to the polarity to the one at the time of writing to the corona wire 11 to allow corona ions to pass through, and scan.
FIG. 3 shows an example of an electrophoretic structure in which rona ions are on the electrochromic layer 22 (1). The electrochromic layer 22 consists of a transparent conductive layer 228% charged colored particles 23Z, a liquid layer 22b dispersed in an insulating liquid, and an IPJ edge l-22C. As the insulating liquid, high-purity petroleum (Esso Corporation, trade name: Fisopar) is used, and an ionic surfactant and an organic substance containing a dye are mixed to create the liquid layer 22b. As a result, the ionic surfactant adsorbs to the organic material containing the pigment, and the organic material becomes electrochemically stably charged and dispersed, thus exhibiting electrophoretic properties.

The operation of this is that when no electric field is applied or when a reverse electric field is applied, the color of the dye dispersed in the insulating liquid layer 22b is visible, or when the electrostatic image 24 is written, the charged colored particles 23 become transparent. This is done by moving to the conductive layer 22a side and making the color of the pigment visible.

(11) Figure 4 shows an example of a rotating sphere configuration.Kt :E, @, l:, %t, layer 2
2a.

One-sided colored sphere 22@Y with one-sided coloring consists of a layer floating with insulating liquid 22f and embedded in an insulating holding medium 22d, an insulating layer 22c. One-sided colored sand 22e is 1, for example, TiO2
4. It is made by arranging white spheres of glass, which is the main component, uniformly and depositing chromium etc. from the top surface. The size may be 30 to 100 μm, but if the size is 10 μm or less, the resolution will be higher. This one-sided colored sand 22e is 13"
The liquid is dispersed in an insulating holding medium 22d such as an elastomer, and an organic solvent insulating liquid 22f such as toluene is collected therein. Since the single-sided colored sand 22 has different surface properties, the amount of ion adsorption differs, and the direction of the surface changes depending on the direction of the electric field.

Therefore, the display function is performed such that the colored surface or non-colored surface is visible depending on whether the electrostatic image 24 is 0 or -.

FIG. 5 shows the appearance of an embodiment of the display device according to the present invention. In this figure, 10A is an electrostatic image writing section, in which a large number of the writing electrodes 10 shown in FIG. Move accordingly. That is, an electrostatic image is written and displayed on the electrochromic layer 22 on the transparent substrate 21 by scanning the writing electrode 10. In addition, the input terminal 25. of the power line (ACllooV). It has an input terminal 26'Y for signals from the machine.

〔Effect of the invention〕

As explained above, the present invention forms an electrostatic image by scanning the electrochromic medium with a writing electrode that forms an electrostatic image by controlling the flow of corner ions, and the electrochromic medium YR color is created by the electric field. Since it has the advantage of low power consumption, low cost, thin shape, and high quality large screen display, it is suitable for large screen display boards such as electronic blackboards in electronic conferences.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the configuration of an embodiment of the present invention, and FIG. 2 (
a) and (b) are explanatory diagrams of the operating principle of the electrostatic image writing electrode, FIG. 3 is a schematic structural diagram showing an example of the electrophoretic type of the electrochromic layer used in the present invention, and FIG. Similarly, a schematic diagram showing the configuration of a rotating sphere type embodiment, and the fifth factor is a perspective view showing an example of the configuration of the capsule display device according to the present invention. In the figure, 10 is t; an inlaid electrode, 11 is a corona wire,
] 2 is a rolled case, 13 is a writing electrode control circuit, 20 is a 'dokai coloring body, 21 is a transparent substrate, and 22 is an 'electrochromic layer'. Figure 3 Figure 4

Claims (1)

[Claims] A display device comprising a writing electrode that controls the flow of corona ions to form an electrostatic image, and an electrochromic medium that generates color when an electric field is applied due to the electrostatic image formed by the writing electrode.