JPS6167026A - Display panel - Google Patents

Abstract

PURPOSE:To simplify the constitution and to reduce the space of a panel part to only an information input space by providing an electrochromic element which is formed by laminating the 1st coloring layer, an insulating layer, the 2nd coloring layer, and another insulating layer in order on a transparent electrode substrate. CONSTITUTION:The display panel is constituted by arranging a transparent electrode 22 on the lower electrode substrate 21 which is transparent like glass, etc., providing a dot spacer 23 in a display part, and forming the electrochromic element 24 formed of a laminate of an oxidation-side coloring layer as the 1st coloring layer, insulating layer, reduction-side coloring layer as the 2nd coloring layer, and the 2nd insulating layer. Then, an upper electrode substrate 26 equipped with an electrode 25 on the reverse surface is provided. Both electrodes are connected mutually across a space by forming a spacer adhesive 27. The space 28 is formed between the upper electrode substrate 26 and electrochromic element 24, and this upper electrode substrate 26 is flexible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a display channel for displaying information on a mother channel surface according to information processing requirements.

[Background of the invention]

A display like this! As an example of a display panel, a display panel using a liquid crystal cell is shown in FIG. In the figure, 1 indicates a liquid crystal cell, and 2 indicates an upper information input cell. The upper information input cell 2 has a lower electrode substrate 4 with an electrode 3 on the upper surface and an upper electrode substrate 6 with an electrode 5 on the lower surface separated by a space 7, and both substrates are glued together with an adhesive 8. It is connected. Dot spacers 9 are formed on the lower electrode substrate 4 K. This display armpit has a complicated structure and requires a space for the liquid crystal cell portion. Moreover, there is a drawback that the display part cannot be pivoted until the information in the upper information input cell is output to the outside.

The present invention provides a display panel that incorporates an electrochromic element that utilizes an electrochemical coloring/decoloring phenomenon, that is, an electrochromic phenomenon, in order to eliminate the drawbacks of F4 grayscale panels using such liquid crystal cells. This is what I am trying to do. Electrochromic elements can be applied to, for example, numeric display elements, x-y matrix display elements, optical shutters, aperture mechanisms, etc., and can be classified into liquid types and solid types based on their materials. In particular, the present invention aims to provide a display panel incorporating an all-solid-state electronic element.

Two structural examples of all-solid-state electrochromic devices utilizing electrochromic phenomena are shown in FIGS. 4 and 5. These figures show the general structure of an all-solid-state electrochromic device.

The electrochromic element shown in Figure WJ4 includes a first electrode 12 made of a transparent conductive film on a transparent substrate 11, and an electrochromic/F! color forming layer on the anode side. 13. An insulating layer 14 made of a dielectric film and a second electrode 15 made of a conductive film are sequentially laminated. Further, a second electrochromic layer 16, which is a coloring layer on the cathode side, is further laminated between the insulating layer 14 and the second electrode 15 in the electrochromic element shown in FIG. 5 and the structure shown in FIG. It is something.

In the above structure, the substrate 1 is generally formed of a glass plate, but it is not limited to a glass plate, and may be any colorless and transparent plate such as a glass plate or an acrylic plate. Not under the first electrode 12,
It may be provided on the second electrode 15, or may be provided on both sides depending on the purpose (for example, as a belly cover).

However, depending on these cases, it may be necessary to use a transparent conductive film for the second electrode 15 or for both electrodes to have a transparent conductive film. If both electrodes are transparent electrodes, a transparent element can be created. The insulating layer 14 may be made of not only a dielectric material but also a solid electrolyte or the like.

The transparent conductive film is ITOp (indium oxide In2
O3 doped with tin oxide S no 2), NESA film, etc. are used. Conventionally, the coloring layer 13 on the anode side is made of chromium trioxide (cr2o3).
, iridium hydroxide (Ir(OH)2), nickel hydroxide (Ni(OH)2), etc.

The insulating layer 14 made of dielectric material is made of zircon dioxide (ZrO
z), using oxides such as tantalum pentoxide (Ta205), silicon oxide (sto, 5to2), etc., or heptadides such as lithium fluoride (LiF), magnesium fluoride (MgF2), etc. Form. In addition, an electrochromic layer 1 which is a coloring layer on the cathode side
6 is tungsten oxide (Ws2r”03),
An all-solid-state electrochromic element with such a structure is formed using molypide oxide 7 (MeO2T Mars), pentoxide A (V,,05), etc. between the first electrode 12 and the second tC electrode 15 By applying a voltage to the material, an electrochemical reaction occurs, resulting in coloring and decoloring. This coloring mechanism is, for example, one electrochromic layer, one layer
It is generally said that bronze is formed by double injection of cations and electrons into 6. for example,
When WO3 is used as an electrochromic substance, an oxidation-reduction reaction represented by the following formula (1) occurs, resulting in coloration.

According to WO+xH++xe-;=HxWO3(i)(1)2, tungsten bronze HxWOs is formed and colored, but if the applied voltage is reversed here, it becomes a decolored state. In the reaction of formula (1), in an all-solid-state electrochromic device, protons are supplied and colored by the separation layer inside the device.

In the above electrochromic device, the electrochromic layer 13, which is the coloring layer on the anode side, is conventionally formed by forming a hydroxide such as iridium hydroxide (Ir(OH)z) by reactive sputtering or an anodic oxidation film method. are doing.

[Purpose of the invention]

It is an object of the present invention to eliminate the drawbacks of the conventional display panel using liquid crystal cells as described above, to have a simple configuration, to necessitate only space for the information person to use the panel, and to use a driving method for inputting information. It is an object of the present invention to provide a disk fv inno-I channel that only requires the use of a drive.

Another object of the present invention is to provide a display panel that has advantages such as superior quality compared to those using liquid crystals, the ability to read displays such as characters even in dim light, and no viewing angle. [Summary of the Invention] A display gray panel according to the present invention includes a first coloring layer, an insulating layer, and a second coloring layer on a transparent lower electrode substrate having a transparent electrode on the upper surface. An electrochromic element consisting of a layer and an insulating layer are sequentially laminated, and a space is provided on top of the electrochromic element.
This device is characterized by providing a flexible upper electrode substrate with electrodes on the lower surface.

[Embodiments of the invention]

The basic configuration of the DisGray panel according to the present invention is explained below.
As shown in the figure. The illustrated display panel has a transparent electrode 22 disposed on a transparent lower electrode substrate 21 made of glass or the like, a Doratos 4-sa 23 provided in the display section, and then a first coloring layer formed on the oxidized side. An electrochromic element 24 is formed of a laminate of a layer, an insulating layer, a reduced coloring layer which is a second coloring layer, and a second insulating layer. Next, an upper electrode substrate 26 having an electrode 25 on its lower surface is provided. In order to connect both electrode substrates to each other with a space between them, a spacer/adhesive 27 is formed to connect the upper and lower electrode substrates.

A space 28 is formed between the upper electrode substrate 26 and the electrochromic element 24, and the upper electrode substrate 26 is flexible.

The upper electrode substrate 26 of the panel incorporating this electrochromic element is in a flexible state. For example, if downward pressure is applied from above the upper electrode substrate 26 by some method, the upper electrode 25 and the electrochromic The upper part of the element 24 contacts and develops color. When decoloring, a reverse voltage may be applied and contact may be made in the same manner as described above.

A spacer is installed inside one panel so that the electrode 25 does not come into contact with unnecessary parts when pressure is applied to the upper electrode substrate 26, and this spacer is preferably transparent.

According to the present invention, the second insulating layer is formed on the second coloring layer, and this is to prevent the colored portion from spreading laterally when the upper electrode comes into contact with the coloring layer. be. That is, because the insulating layer is located between the electrode and the coloring layer, current flows in the vertical direction of the insulating layer, but does not flow in the horizontal direction. This can prevent the colored portion from spreading in the lateral direction.

Next, one embodiment of the present invention will be described.

A transparent electrode made of ITO (transmittance 85 cm, resistance value 1
A 0Ω/cIn% film thickness of 2000 A) is formed, and a white adhesive (5E-1700) is applied and cured on the opposite side to produce an electrode substrate.

A doratos 4-sa is formed on this electrode substrate by screen printing.

The screen printing method for the dot spacer was as follows. A large number of holes with a diameter of 0.05 m are drilled in a metal plate with a thickness of 0.1 m, and used as a screen plate. UV curable ink (e.g. Loctite 350) is screen printed and cured to a height of 20 m.
A dot spacer with a diameter of about μm and a diameter of about 0.1 mm is obtained.

Next, a thin plate of gold J4Ir was tartted using the reactive snow vine method, and a gas of H2:0□=l:2 was introduced, and 0.5
A high frequency of W/1yn2 is applied to form I as the first coloring layer.
3001 r(OH)2 films were formed. Next, as an insulating layer, a Ta 20 s film was formed with a thickness of 30,001. As the second coloring layer, WO2 film was used at 4000X, and as the second insulating layer, S
A 50×1 layer of iO□ was formed by a vacuum evaporation method using an electron gun.

After forming these films, the upper electrode plate (Tijin l0D
An adhesive was printed around the lower electrode substrate for bonding with TORI). This adhesive has a spacer (e.g. Micropearl, φ40μff+
) is mixed in. After screen-printing this adhesive (Example 5E-1700) and bonding the upper 1iL electrode substrate, heating was performed for 30 minutes at isoC to complete a disk gray panel.

A voltage of 1.5V is applied between the upper and lower electrodes of the display panel manufactured in this way, with the upper side as the cathode and the lower side as the anode, and when you trace letters, etc. while pressing the upper substrate with your finger,
A display similar to the trajectory of the finger appeared. This display is blue on a white background and is very easy to read.

When erasing, it is sufficient to apply a reverse voltage and trace the displayed area, or to draw the upper electrode on the entire surface of the electrochromic element by some method.

FIG. 1 shows a cross-sectional view of a display tunnel according to the invention. FIG. 2 is a plan view of the lower substrate showing the state of the spacer.

[Invented fishing gear]

As mentioned above, the present invention 1) simplifies the blind bottom of the screen display panel, and the space in the channel portion only needs to be used as an information input space; This also has the advantage of requiring only the use of information input drive.

In addition, the quality is much better than those using conventional liquid crystals, so it is possible to display characters etc. even in dim light, and there is no viewing angle.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the basic structure of the display gray channel according to the present invention, Fig. 2 is a plan view showing the arrangement of dot spacers on the lower electrode substrate, and Fig. 3 uses a conventional liquid crystal cell. Cross-sectional views of the display gray panel, Figures 4 and 5
The figure is a sectional view showing two examples of the structure of an electrochromic element. l...Liquid crystal cell 2...Upper information input cell 3...Electrode 4...Lower electrode substrate 5.
...Electrode 6...Lower electrode substrate 7...
Space 8... Adhesive 9... Dot spacer 11... Substrate] 2... t1 13... Electrochromic layer 14... Insulating layer 15... Electrode 16...
Electrochromic layer 21... Lower electrode substrate 22... Transparent electrode 23.
... Dot spacer 24 ... Electrochromic element 25 ... Electrode 27 ... Adhesive 28 ...
・Space Figure 1 Figure 2 Diagram 1 Figure 3 Figure 4 rs, -, °, °, ', ', ' , ', ',' Figure 5

Claims (1)

[Claims] An electrochromic element is provided on a transparent lower electrode substrate with a transparent electrode on the upper surface, and is formed by sequentially laminating a first coloring layer, an insulating layer, a second coloring layer, and an insulating layer; A display panel characterized in that a flexible upper electrode substrate with electrodes on the lower surface is provided with a space between the two.