JPH0323424A - Liquid crystal display element - Google Patents

Abstract

PURPOSE:To improve display quality by installing dummy electrodes having a specific opposite distance to the respective end parts which are connected to the respective electrodes of plural electrode groups and are disposed to face each other on the outside of an effective display region. CONSTITUTION:The plural electrode groups are connected to the respective electrodes. The dummy electrodes whose respective end parts (c) disposed to face each other are shorter than the opposite distance at the respective electrode butt pats (d) on the effective display region and which are formed in proximity to the extent that the potential difference between the electrode groups due to the static electricity generated at the time of the rubbing treatment of the oriented films in the stage for producing lass substrates is easily eliminated by the discharge between the ends (c) are installed on the outside of the effective display region. A relatively small voltage generated between the dummy electrodes is immediately discharged at this point to eliminate the potential difference if such voltage is generated when the potential difference is generated between the electrode groups due to the generation of the static electricity during the rubbing treatment of the oriented films in the production process. The discharge is not generated at all in the respective electrode butt parts (e) on the effective display region in this way and the display fales by the damage of the discharge are no longer visible.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention is capable of reducing the voltage of multiple electrode groups within an effective display area even if a large amount of static electricity is generated during the rubbing process of an alignment film on a transparent substrate during the manufacturing process. The present invention relates to a large-sized dot matrix type liquid crystal display element with a high duty ratio that prevents damage caused by electric discharge to the abutting portions of the extreme ends.

[Conventional technology] Conventionally, a dot 1 matrix type large liquid display element was used.
In order to divide the electrodes on a single substrate into multiple electrode groups and perform time-division display on each of them, a liquid crystal display having an electrode abutting portion in which the electrode ends of multiple electrode groups are placed facing each other in the right-hand display area. In display elements, a large amount of static electricity is generated during the rubbing process of the alignment film in the manufacturing process of the substrate, but it is possible to reduce the electrostatic charge on the electrodes due to the static electricity by discharging it as soon as possible, so that there are no large scars on the display due to the discharge. To prevent the appearance of
Each ry. (Japanese Unexamined Patent Publication No. 60-218625), it is desirable to provide lightning rod-like locations on both ends of the pole where discharge can occur relatively easily.

[Problems to be Solved by the Invention] The above-mentioned conventional techniques are effective to some extent, but if you consider what happens after the tsukan is put into use, there is a problem with the electric shock at the electrode abutting part. The distance and shape between the parts are not very clear, and sometimes a relatively large discharge occurs, and the scars caused by the discharge on that part of the alignment film may be visible after the alignment film is in use. There was a problem.

The present invention solves the above-mentioned conventional problems, and employs a dot matrix method in which no 'R lightning rod is disposed at the electrode butt portion in the right-hand display area, and there is no discharge scar at all. The aim is to provide a large-screen, large-duty-ratio liquid crystal display element for time-sharing operation.

[A Thousand Steps to Solve the Problem] In order to achieve the above object, the present invention uses a dot matrix type doll liquid display element that divides the electrodes on one substrate into a plurality of electrode groups and performs time sharing. In order to perform display, in a liquid crystal display element having an electrode abutting part in which the electrode ends of a plurality of electrode groups are arranged facing each other within an effective display area, the electrodes are connected to each electrode of the plurality of electrode groups, and the effective display area is The respective ends facing each other on the outside are shorter than the facing distance at each electrode abutting part within the effective display area, and the potential difference between the electrode groups due to static electricity generated during the alignment film rubbing process in the glass substrate manufacturing process is at the ends. Dummy electrodes were placed close enough to each other to be easily extinguished by discharge between the electrodes.

[Operation] If the above is done, the shape of the opposing electrode ends of the dummy electrodes connected to each electrode of the multiple electrode groups and the distance between them will be limited by the conditions after entering the state of use. If static electricity is generated during the rubbing process of the distributed IIIJ film during the manufacturing process and a potential difference occurs between the electrode groups, it can be determined immediately when a relatively small voltage is generated between the dummy electrodes. It is possible to discharge the potential difference and prevent it from developing into a large discharge due to high voltage. Therefore, no discharge occurs at each electrode abutting portion within the effective display area, and no display scratches or the like due to damage caused by discharge can be seen.

[Example] Figure L is a schematic diagram of an embodiment of the present invention, in which a is a glass substrate, b is an electrode individual separation line lt7i, C is a lightning rod-like end of a dummy electrode, and d is a transparent The conductive film wiring, C, is the abutting portion of the electric field on the west side of the right-hand effect display area. 2. Figure 1 is an enlarged view of the lightning rod-like end C of the dummy electrode, and Figure 3 is the electrode butt part C.
It is an enlarged view of. Dummy electrodes are used for each electrode in each of multiple electrode groups.
Since it must be connected to 'Jλ, the board 'M
Up to the middle of the construction, each electrode is connected to a dummy electrode by a transparent conductive film wiring d outside the electrode individual separation cutting line b, but after finishing the alignment film rubbing process, The electrodes are individually separated outside the electrode individual separation cutting line b so that a unique voltage can be applied to each electrode at an appropriate time.

Therefore, the electrodes can be separated individually. Line b is, of course, outside the right-effect display area.

Conventionally, discharge occurred at the electrode abutting portion, but with the above configuration according to the present invention, the dummy electrode according to the present invention can be formed at a distance shorter than the facing distance of the electrode abutting portion 0 in the Ij effect display area. When a relatively small potential difference occurs between the two ends C, it immediately discharges, and the static charge that is the source of the potential difference can be completely destroyed. [Effects of the Invention] As explained above, according to the present invention, even if static electricity is generated during the alignment film rubbing process during manufacturing, no discharge occurs between the electrodes at the electrode abutting portion in the effective display area. This will improve display quality.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of an embodiment of the present invention, FIG. 2 is an enlarged view of the lightning rod-like end of the dummy electrode, and FIG. 3 is an enlarged view of the electrode abutting portion.

Claims (1)

[Claims] 1. In a large dot matrix liquid crystal display element, the electrodes on a single substrate are divided into multiple electrode groups to perform time-division display, so the electrode ends of multiple electrode groups face each other within the effective display area. In a liquid crystal display element having electrode abutting portions arranged, each end connected to each electrode of each of the plurality of electrode groups and facing each other outside the effective display area is connected to each electrode abutting portion within the effective display area. The dummy electrodes are formed so close that the potential difference between the electrode groups due to static electricity generated during the alignment film rubbing process in the glass substrate manufacturing process is easily eliminated by the discharge between the ends. A liquid crystal display element featuring: