JPS5975227A - Electrochromic display - 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 The present invention relates to an electrochromic display device comprising a glass front plate for electrical contact and a touch surface with a display structure, a light reflective material impregnated with an electrolyte, and a monk-shaped back wall for a back electrode. .

Blue tungsten blue can be reversibly produced by passing cathodic current through a colorless tungsten oxide thin film in contact with a suitable electrolyte. Display information using 1-7. The display container must be sealed to prevent leakage of the electrolyte, which is generally a liquid. At the same time, the influence of outside air is blocked. The tungsten oxide layer is 45
At temperatures above 3°C, its electrochromic properties are significantly inhibited. Glass solder closure is therefore not possible and hermetic sealing of the electrochromic cell must be by adhesive.

Structure of the electrochromic display device: The starting point for the development described in this report was a completely symmetrical structure with a front plate and a back plate similar to a liquid crystal cell, but during the development process, the structure deviated significantly from that. A prototype cell format has been produced. For example, one has been proposed that uses a monk-shaped metal back wall made in advance by extrusion as a base.

In conventional electrochromic displays, the functions of the hermetic back wall and the back electrode are combined in one component, or materials compatible with the electrochromic material, such as iron plates or titanium plates, are used. In this case, the thickness of the plate cannot be reduced below a certain limit in order to maintain mechanical stability.

An object of the present invention is to simplify the structure of a known electrochromic display device to facilitate the production of the display device.

This object is achieved by the features listed in Claim J and the structures listed in Items 1 to 1.

The front panel and the back wall may be joined together by a sealed adhesive combination of silicone rubber and closed ends. If carefully crafted, the closed end will prevent adhesive from entering the inside of the display; this adhesive bond will withstand temperatures up to 353K; add a silicone rubber backing ring, especially for non-curing silicone rubber adhesives; This effectively seals and connects the front plate and the back wall.

Furthermore, the combination of a backing ring and a cover frame is also effective in sealing the connection between the front plate and the back wall.

The material for the back wall may be a melamine resin material or a polyethylene 7-I nofuclate material. By simultaneously housing the back electrode within this back wall, the function as an electrode and the mechanical configuration can be completely separated. It is also possible to use the same structure and a variety of back electrodes that are less stable or permeable to the electrolyte. Therefore, for example, the kW of titanium plate
Another advantage is that it is significantly lower cost than walls.

The synthetic resin used as the material for the back wall is required to have various properties such as injection moldability, press moldability, mechanical stability, inertness to electrolytes, and the possibility of adhesion to the front plate. Suitable materials include melamine reinforced with polyethylene alephthalate and glass fibers. No effect of the back wall material on the function of the display cell was observed when using these materials.

In principle, the back wall is made in the shape of a monk, with holes on the flat bottom for filling and for contacting the back electrode.

+1) No No V Horn V No No l'iJ''-N
'l-'114ゝRisheP)'a) Fill with electrolyte with n(4). This filling hole is used to contact the back electrode, but depending on the material of the back electrode, the contact and filling may be performed through separate holes. Special steel or titanium screws are used for contact and sealing.

This invention will be described in more detail with reference to the drawings showing embodiments of the invention.

FIG. 1 shows an analysis of one embodiment of the present invention.

11 is a monk-shaped back wall made of, for example, melamine resin; 12 is a back electrode housed within this back wall; 13 is a sealing backing; 14 is a glass front plate having a display structure;
1 is a connection terminal of the back electrode 12, and 16 is an electrolyte filling hole.

Figure 2 shows the simplest connection method between the front plate and the back wall. The back wall 21 and the glass front plate 24 with the display structure are connected by adhesive bonding using silicone rubber 27. , 28 are closed ends that prevent the adhesive body 27 from entering the inside of the display device.

Show the method. Waiting for the monk-shaped back wall 31 and display structure, °f class face plate 34 is made of silicone rubber 37 and backing ring 38
They are joined by a concentric bond consisting of: 1t. Ring 3
8 acts to reinforce the sealing performance for uncured silicone rubber adhesives.

A temperature load test of 50,000 openings and closings and 353 hours for 50 hours showed that the backing ring alone was sufficient for effective sealing of the display.

FIG. 4 schematically shows a further embodiment in which the sealing connection between the back wall 41 and the glass front plate 44 is effected by a silicone rubber backing ring 48 and an overlay 49. The back wall 41 is covered with synthetic resin, for example, polyvinyl chloride.
The necessary compression pressure is applied by fitting it in. If the sealing process is performed within the electrolyte, the above structure allows filling of the display device without the need for a vacuum.

The front electrode groove; connection method shows the method of contacting the spring (7) structure formed on the back wall by injection, pressing, etc. in the form of a plug row or conductor plate. In FIG. 1 this is done through contact.

Figure 5 shows the culture between the front electrode 54 and the spring contact 4 contacts 5!2 to 1
The configuration of the embodiment is shown below. In this configuration, when assembling the individual parts of the display device, the contact springs 512 are pressed against the electrode terminals of the front If lath plate, creating a stable connection with the IP and contact portions on the back. In this way, the nctrothalomic display device can be connected directly to a circuit by means of conventional plug-in contacts or soldering contacts without any forces being applied to its glass parts.

To prevent group 61L of spring contacts 512, the assembled device is encapsulated in silicone rubber, and the backing ring 58 prevents contamination of the WO3 layer by uncured silicone rubber parts. In FIG. 5, 51 is a back wall, and 59 is a cover.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of one embodiment of the present invention, and FIG.
Figures 4 to 4 show three types of sealing coupling methods between the front plate and the back wall, and Figure 5 shows the front plate electrode groove (8), 13... backing, 14... glass front plate. 16... Filling hole.

Claims (1)

[Claims] 1) The back wall (11) is made of an organic insulator and the back wall (11) is
2): A” is provided in the back wall (1) and electrical contact is made with one thread passing through the back wall, and the front plate (14) and the back wall (11
) are connected to each other by a sealing joint (13); a glass front panel with a display structure and an electrically angular surface; a truncated back wall with a light-reflecting material impregnated with electrolyte and a back electrode; 2) A display according to claim 1, characterized in that: 2) a combination of a silicone rubber body (27) and a closed end (28) is provided as a sealing joint; Device. 3) A display device according to claim IJ11, paragraph J, characterized in that the sealing joint is a silicone rubber body (37). 4) A self-cultivated display device according to claim 1, characterized in that a sealing ring (48) and a cover (49) are installed as a sealing joint. 5) Melamine resin as an organic insulator for the back wall? The display device according to one of claims 1 to 4, characterized in that the display device uses a polyethylene resin material or a polyethylene resin.