JPS6131351Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrode structure of a display body, and is particularly characterized by having an insulator partially on the electrode.

An object of the present invention is to obtain a three-dimensional image in a first field-effect display. A second purpose is to reduce current consumption in a current effect type display. Field-effect displays include liquid crystal displays of various modes, PLZT, EPID, etc., and current-type displays include DSM liquid crystal displays, EC, etc. Conventional drawbacks and the present invention will be explained using a FETN liquid crystal display as an electric field type display and an EC as a current type display as an example.

FETN liquid crystal displays have the disadvantage that the image display is flat and lacks a three-dimensional effect. The present invention attempts to obtain a three-dimensional image by taking advantage of the phenomenon that when an electrode is coated with an insulator, contrast decreases when the thickness exceeds a certain level. Figure 1-1 is a sectional view of the electrode structure of the present invention, Figure 1-2 is a plan view,
FIG. 2 shows a V-contrast curve when the electrode structure of the present invention is used in combination with a conventional common electrode. In FIG. 1-1, 1 is a substrate, and inorganic materials such as glass, ceramic, and inorganic crystals, and polymeric materials such as polyester, polysulfon, polyether sulfon, cellulose, and nylon are used. 2 is a transparent conductive film, and a metal oxide such as tin oxide or indium oxide or a metal thin film such as Au or Pd is used, and is coated on the substrate 1 by a CVD method, a spray method, a vapor deposition method, a sputtering method, etc. Then, etching patterning is performed by screen printing, photoresist method, etc. 3 is an insulator, and inorganic compounds such as SiO, SiO ₂ , TiO ₂ , ZrO ₂ , Al ₂ O ₃ , silicon nitride, MgF ₂ , and polymeric materials such as silicone resin, polyimide resin, Teflon resin, and polyester resin are used. It will be done.

In view of the gist of the present invention, the smaller the dielectric constant, the smaller the thickness. 1000Å~ when using SiO ₂
The thickness is about 3000 Å, preferably 1500 Å to 3000 Å. These insulators can be patterned by masking or etching in the same manner as the transparent conductive film. The polymer insulator can be formed by coating by a spinner method using a mask, a dipping method, or the like, or by patterning by an etching method. With the shape shown in Figure 1, the two displayed images have high contrast;
The three-part display image is a low-contrast image, that is, a stereoscopic image with low contrast in the center and high contrast in the periphery.

The V-contrast curves of the displayed images of parts 2 and 3 are shown in FIG. When driven at 3.1V and 32Hz, the second part shows a contrast curve like A, and the third part shows a contrast curve like B. This kind of effect is
In addition to FETN LCD display, guest host, DAP,
It can also be used for displays such as PLZT.

In a current effect display, the contrast is proportional to the current density, so the only way to reduce current consumption with the same contrast is to reduce the area of the image display electrodes. By providing the electrode structure as shown in FIG. 1, the current value decreases in proportion to the coverage ratio of the electrodes 2 to 3. In EC using WO ₃ , TiO ₂ , Mo ₂ O ₃ , and pulse electrolytic iridium, a display electrode such as WO ₃ is formed on the second transparent conductive film, but the third insulator is formed on the WO ₃ electrode. It's better to let them. In the viologen-based EC, the electrode structure shown in Figure 1-1 is used as is.

As mentioned above, the present invention provides a liquid crystal display in which a field-effect liquid crystal is sealed within a pair of substrates, and electrodes are formed on each substrate, and the outline of the electrode formed on one of the substrates is A region having a contour end on the inside at a predetermined distance from the end is formed on the electrode, and a transparent conductive film with a thickness of 3000 Å or less is formed on the entire surface of the region, so that the electrode does not have an insulating thin film formed thereon. There is a difference between the voltage applied to the liquid crystal from the contour area and the voltage applied to the liquid crystal in the area where the insulating thin film is formed, so that the contour area is dark and the inside of the electrode is pale, resulting in a three-dimensional display. Can be done.

Display bodies using the electrode structure obtained by the present invention are used for watches, calculators, televisions, optical shutters, graphic displays, displays for measuring instruments, and the like.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an electrode according to the present invention, FIG. 1 is a plan view of an electrode according to the present invention, and FIG. 2 is a V-contrast curve of a FETN liquid crystal display using the electrode according to the present invention.

Claims (1)

[Scope of utility model registration request] In a liquid crystal display in which a field-effect liquid crystal is sealed within a pair of substrates, and electrodes are formed on each substrate, a predetermined distance apart from the edge of the contour of the electrode formed on one of the substrates. 1. A liquid crystal display comprising: a region having a contour end on the inside thereof; and a transparent insulating film having a thickness of 3000 Å or less formed on the entire surface of the region.