JPH05196947A - Liquid crystal display - Google Patents

Abstract

PURPOSE:To impress a uniform driving signal voltage to the respective display electrodes of a first electrode pattern. CONSTITUTION:This device is constituted by facing a first substrate 1 provided with a first electrode pattern 3 and a second substrate 2 provided with a second electrode pattern 4 each other, and a slit 12 is provided at a part corresponding to the non-cross part of the first and second electrode patterns 3 and 4 in the first electrode pattern 3 adjacent to terminal electrodes 9a-9c of the second electrode pattern 4 so as to lower the conductivity of the first electrode pattern 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display in which liquid crystal is filled between two substrates having display electrodes on opposite surfaces.

[0002]

2. Description of the Related Art Liquid crystal displays are used in a wide variety of applications because of their low power consumption, small size and light weight. Recently, in addition to the conventionally used TN (Twisted Nematic) type, we have developed a birefringence mode liquid crystal display that makes the twist angle of liquid crystal molecules 180 ° or more, and has a large capacity and high visibility for personal computers and word processors. It is possible to display gender, and its applications are expanding. Generally, a liquid crystal display has a structure in which a liquid crystal is sandwiched between two glass substrates having transparent display electrodes formed in a strip shape on the surface.

Such a liquid crystal display has a structure in which a plurality of strip-shaped display electrodes which are orthogonal to each other are formed on two glass substrates. Then, the tip of the display electrode for inputting a drive signal to the display electrode, through the wiring electrode,
It is exposed to the edge of the glass substrate to serve as a terminal electrode. A common driver and a segment driver for inputting a driving signal to this are connected to the respective glass substrates for display.

[0004]

By the way, when a display operation is performed in this type of liquid crystal display device, the display dots far from the common driver and the segment driver are driven by the resistance value of the electrodes as compared with the display dots in the vicinity. Since a signal voltage drop occurs, the display density becomes low, and there is a problem that uniform display cannot be performed in the entire display device. In order to eliminate such a display density difference, a method has been proposed in which the width of the wiring electrode pattern is corrected in advance when the electrode pattern is formed and the resistance value of the display electrode is changed. However, when the resistance value is changed depending on the width of the wiring electrode pattern, the pattern width may become too narrow, which may cause a problem such as disconnection. It was difficult to make the display density uniform by making the voltage uniform. The present invention has been made in view of such conventional circumstances.

[0005]

SUMMARY OF THE INVENTION The present invention is a liquid crystal display in which liquid crystal is sandwiched between first and second substrates having first and second electrode patterns formed on opposite surfaces thereof. And a slit is provided at a portion corresponding to a non-intersecting portion of the first and second electrode patterns in the first electrode pattern near the input terminal of the second electrode pattern, The conductivity of is reduced.

[0006]

According to the present invention, the non-intersecting portions of the first and second electrode patterns are arranged so that the conductivity of the first electrode pattern near the input terminal of the second electrode pattern to which the drive signal is applied is lowered. By providing a slit in the corresponding part,
It is possible to make the display density uniform by keeping the voltage supplied to each display electrode in the first electrode pattern constant.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing an essential part of an embodiment of the present invention, and FIG. 2 is a sectional view corresponding to the AA 'axis in FIG. According to the manufacturing process in FIGS. 1 and 2,
A first electrode pattern 3 and a second electrode pattern 4 made of, for example, an ITO film are formed on one main surface of the first substrate 1 and the second substrate 2, which are made of glass, respectively. Here, the first electrode pattern 3 includes the display electrodes 5a, 5b, 5
c, 5d, terminal electrodes 6a, 6b, 6c, 6d and wiring electrodes 7a, 7b, 7c, 7d for connecting these electrodes, respectively. The second electrode pattern 4 is also similar to the first electrode pattern 3 in the display electrodes 8a, 8b, 8c and the terminal electrodes 9a, 9c.
b, 9c and wiring electrodes 10a for connecting these electrodes,
It has a plurality of scanning electrodes each composed of 10b and 10c. Further, a portion corresponding to the non-intersection portion of the first and second electrode patterns 3 and 4, that is, the display dot 11
Except for the above, the display electrode 5a has, for example, three round slits 12, the display electrode 5b has, for example, two round slits 12, and the display electrode 5c has, for example, one round slit 12. Is provided. Next, the first and second substrates 1 and 2 are combined with each other, for example, with a sealant 13 so that their main surfaces face each other, and a liquid crystal 14 is held in this gap. Here, terminal portions 6a, 6b, 6c, 6d are provided in the extension portion 15 of the first substrate 1 with respect to the second substrate 2, and terminals are provided in the extension portion 16 of the second substrate 2 with respect to the first substrate 1. The electrodes 9a, 9b, 9c are exposed.

In this embodiment, the display electrodes 5a, 5b, 5 are arranged so that the number of slits 12 is reduced from the position near the terminal electrodes 9a, 9b, 9c which are the input terminals of the scanning side drive signal.
forming c. As a result, the display electrodes 5a, 5b, 5
The conductivity of c decreases as it approaches the terminal electrodes 9a, 9b, 9c, and each of the display electrodes 5a, 5b, ...
It is possible to apply a uniform drive signal voltage to.

In this embodiment, the slit 12
Is provided at the non-intersection portion of the first and second electrode patterns 3 and 4, so that it does not adversely affect the display quality, and the shape and number of the slits 12 are within the range in which the object of the present invention is achieved. It is optional. Further, although the case where the first electrode pattern 3 is the signal electrode and the second electrode pattern 4 is the scanning electrode has been described so far, conversely, the first electrode pattern 3 is the scanning electrode and the second electrode pattern 3 is the scanning electrode. It goes without saying that the present invention can be applied to the case where the electrode pattern 4 of 4 is a signal electrode.

[0011]

As described above, the present invention utilizes the slit to provide a second
By lowering the conductivity of the first electrode pattern near the input terminal of the electrode pattern, a uniform drive signal voltage can be applied to each display electrode, and the display density becomes uniform and the display quality is improved. Further, it is not necessary to correct the electrode pattern width when designing the electrode pattern, and stable electrode design can be performed even in a high-definition display device.

[Brief description of drawings]

FIG. 1 is a plan view showing a main part of an embodiment of the present invention.

FIG. 2 is a cross-sectional view corresponding to the AA ′ axis in FIG.

[Explanation of symbols]

 1 ... First substrate 2 ... Second substrate 3 ... First electrode pattern 4 ... Second electrode pattern 12 ... Slit 14 ... Liquid crystal

Claims (1)

[Claims] 1. A liquid crystal display in which a liquid crystal is sandwiched between a first substrate and a second substrate having first and second electrode patterns formed on opposite surfaces thereof, respectively, and the second electrode pattern is provided. 2. A liquid crystal display, wherein a slit is provided in a portion of the first electrode pattern near the input terminal corresponding to a non-intersecting portion of the first and second electrode patterns to reduce conductivity.