JPH0654041U - Liquid crystal display - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a liquid crystal display device capable of suppressing an erroneous display due to static electricity and preventing an inspection error during a display inspection. In a liquid crystal display device in which a liquid crystal 4 is enclosed between a pair of transparent substrates 1 and 2 having transparent electrodes 5 and 6, almost the entire outer surfaces of the substrates 1 and 2 are covered with a transparent conductive film 12. A portion of the transparent conductive film 12 that covers the outer surface of the one substrate 1 and a portion of the transparent conductive film 12 that covers the outer surface of the other substrate 2 are electrically connected to each other via the conductive portion 12c.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a liquid crystal display device that displays an image using liquid crystal.

[0002]

[Prior art]

 FIG. 3 shows the structure of a conventional simple matrix type liquid crystal display device. In this liquid crystal display device, a pair of transparent substrates 1 and 2 made of glass or the like are stacked with a frame-shaped seal member 3 interposed therebetween, and a liquid crystal is provided in a region between the seal member 3 and the substrates 1 and 2. 4 is enclosed.

Transparent electrodes 5 and 6 made of a transparent conductive film such as ITO are formed on the inner surfaces of the substrates 1 and 2 in a direction intersecting each other at right angles, and these transparent electrodes 5 and 6 are formed respectively. The substrates are covered with alignment films 7 and 8 made of polyimide or the like, and polarizing plates 9 and 10 are attached to the outer surfaces of the substrates 1 and 2, respectively.

Then, a voltage is selectively applied between the transparent electrodes 5 and 6 according to image information, and the orientation of the molecules of the liquid crystal 4 in the electrode pair portion to which the voltage is applied is changed to display a desired image. It is a thing.

[0005]

[Problems to be solved by the device]

 Generally, when such a liquid crystal display device is manufactured, a display inspection for inspecting an image display state is performed after the manufacturing. However, static electricity is generated when the protective sheet attached to one of the polarizing plates 9 or 10 exposed on the upper and lower surfaces of the liquid crystal display device is peeled off or a charged hand or other object is brought into contact with the display inspection. Then, a potential difference is generated between one substrate side and the other substrate side of the liquid crystal display device, and the potential difference causes the molecules of the liquid crystal 4 to behave erroneously, which may cause an inspection error. .

The present invention has been made in view of such a point, and an object thereof is a liquid crystal display capable of suppressing the occurrence of erroneous display due to static electricity and preventing an inspection error at the time of display inspection. To provide a device.

[0007]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention provides a liquid crystal display device in which a liquid crystal is enclosed between a pair of transparent substrates having transparent electrodes formed thereon. A conductive film is provided, and the pair of transparent conductive films are electrically connected via a conductive member.

[0008]

[Action]

 In such a configuration, even if static electricity is generated by rubbing the outer surface of one transparent substrate of the liquid crystal display device, the static charge passes from the one transparent substrate side to the other through the transparent conductive film. Therefore, there is no possibility that a potential difference due to static electricity is generated between one transparent substrate side and the other transparent substrate side. Therefore, the malfunction of the liquid crystal due to the generation of static electricity can be prevented, and the display inspection of the liquid crystal display device can be properly performed without any error.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The parts corresponding to those of the conventional structure are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 1 shows a first embodiment of the present invention. In the first embodiment, a transparent and conductive transparent conductive film 12 is attached between the outer surface of one transparent substrate 1 and the outer surface of the other transparent substrate 2, and the transparent conductive film 12 is attached. Thus, almost the entire outer surface of one transparent substrate 1 and the entire outer surface of the other transparent substrate 2 are covered.

The transparent conductive film 12 is formed, for example, by forming a transparent and conductive ITO film 14 on one surface of a transparent resin film 13 by means of vapor deposition or the like. It is affixed so that it adheres closely to the outer surface of the.

The transparent conductive film 12 includes a first cover portion 12 a that covers the outer surface of one transparent substrate 1, a second cover portion 12 b that covers the outer surface of the other transparent substrate 2, and the first cover portions 12 b. It comprises a conducting portion 12c for electrically conducting the sill portion 12a and the second covering portion 12b. The conducting portion 12c is attached to the side surfaces of the transparent substrates 1 and 2 and the side surface of the sealing material 3. Polarizing plates 9 and 10 are attached to the outer surface of the first cover 12a and the outer surface of the second cover 12b, respectively.

In such a liquid crystal display device, when static electricity is generated by rubbing the surface of one of the polarizing plates 9 during the display inspection after manufacturing, the liquid crystal 4 is sandwiched between the both sides. Since the side is electrically maintained by the ITO film 14 and kept at the same potential, a potential difference due to static electricity does not occur between the one transparent substrate 1 side and the other transparent substrate 2 side. Therefore, the liquid crystal 4 does not malfunction, and therefore the display inspection of the liquid crystal display device can be properly performed without error. Of course, even after the liquid crystal display device is shipped to the market as a product, malfunction of the liquid crystal 4 due to static electricity is similarly prevented.

Further, in the transparent conductive film 12 in this example, the ITO film 14 side is attached to the outer surfaces of the transparent substrates 1 and 2. In this case, the smoothness of the outer surfaces of the transparent substrates 1 and 2 made of glass or the like is extremely high, so that the ITO film 14 should be adhered to the transparent substrates 1 and 2 so as to be firmly adhered to the entire outer surfaces of the transparent substrates 1 and 2. The electrical connection property and the adhesive strength are improved.

FIG. 2 shows a second embodiment of the present invention. In this second embodiment, polarizing plates 9 and 10 are directly attached to the outer surfaces of transparent substrates 1 and 2, and A transparent conductive film 12 is attached to the outer surface of one polarizing plate 9 and the outer surface of the other polarizing plate 10, and the first cover portion 12a of the transparent conductive film 12 substantially covers the entire outer surface of one transparent substrate 1. And the second cover 12b covers almost the entire outer surface of the other transparent substrate 2.

In such a liquid crystal display device, static electricity is generated by, for example, rubbing the surface of the resin film 13 in the first cover portion 12a of the transparent conductive film 12 that covers the outer surface of the one transparent substrate 1. However, as in the first embodiment, the both sides of the liquid crystal 4 sandwiched therebetween are electrically kept at the same potential by the ITO film 14, so that one transparent substrate 1 side and the other transparent substrate 1 side. There is no possibility that a potential difference due to static electricity is generated between the second side and the second side, and malfunction of the liquid crystal 4 due to static electricity can be prevented.

Further, in the second embodiment, since the transparent conductive film 12 is attached to the outer surfaces of the polarizing plates 9 and 10, this transparent conductive film 12 is used for protecting the polarizing plates 9 and 10. There is an advantage that it can also be used as a member.

In the first and second embodiments, the transparent conductive film 12 having the same width as a whole is attached from the outer surface side of one transparent substrate 1 to the outer surface side of the other transparent substrate 2. Although the intermediate portion thereof is the conducting portion 12c that electrically connects the first cover portion 12a and the second cover portion 12b, it is not limited to such a configuration, and the point is that the outer surface of one transparent substrate 1 is It suffices that the first covering portion 12a for covering and the second covering portion 12b for covering the outer surface of the other transparent substrate 2 are electrically connected to each other, for example, the first covering portion 12b and the second covering portion 12b. There may be a case where the covering portion 12b and the covering portion 12b are electrically connected by a linear conducting member.

[0019]

[Effect of device]

 As described above, according to the present invention, since the outer sides of the pair of transparent substrates sandwiching the liquid crystal are electrically connected to each other by the transparent conductive film and kept at the same potential, the liquid crystal enclosed between the two substrates is kept. There is an advantage that malfunction due to static electricity can be prevented and the inspection can be performed with high accuracy without causing an inspection error in the display inspection of the liquid crystal display device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a liquid crystal display device according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a conventional liquid crystal display device.

[Explanation of symbols]

 1, 2 ... Transparent substrate 4 ... Liquid crystal 5, 6 ... Transparent electrode 12 ... Transparent conductive film 12a ... Cover part 12b ... Cover part 12c ... Conducting part

Claims (1)

[Scope of utility model registration request] 1. A liquid crystal display device in which a liquid crystal is sealed between a pair of transparent substrates having transparent electrodes formed thereon, and a transparent conductive film extending over substantially the entire surface of each substrate is provided, and the pair of transparent conductive films are provided. A liquid crystal display device, wherein the film is electrically connected through a conductive member.