JPH05188362A - Manufacture of liquid crystal display device and its glass substrate - Google Patents

Abstract

PURPOSE:To discharge static electricity generated in the course of manufacture at a place having no relation to a display, and also, to smoothly execute an open/short inspection. CONSTITUTION:This glass substrate consists of a glass substrate 10 which becomes to be a product, and other glass substrate 13 than the product, which is cut off after its manufacture. 20 denotes a transparent electrode for a display, which transparent electrode 20 is extended onto other glass substrate 13 than a product, and an electric discharge terminal 20b for discharging static electricity is formed. 21 denotes a pseudo short electrode which becomes a discharge destination of the electric discharge terminal 20b. An end part of the electric discharge terminal 20b has an angle of theta. As for theta, theta<=90 deg. is desirable. After a liquid crystal is enclosed between a pair of glass substrates, a polarizing plate, etc., are disposed, and they are assembled as a liquid crystal display device. Thereafter, by cutting off the part of the other glass substrate 13 than a product, the liquid crystal display device being a product is obtained.

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 device,
In particular, it relates to the manufacturing method and the glass substrate.

[0002]

2. Description of the Related Art FIG. 4 shows a glass substrate of a conventional liquid crystal display device. A display unit 11 is provided on the glass substrate 10. In this display unit 11, the ITO (Indium T
A transparent electrode 12 such as an in oxide film is formed. A necessary voltage is supplied to the transparent electrode 12 from an external circuit (not shown) via the voltage application terminal 12a. A pair of such glass substrates 10 are prepared, liquid crystal is sealed between them, and a polarizing plate is arranged outside the glass substrates. In the assembly process of the liquid crystal display device, static electricity is generated in the transparent electrodes 12 of the glass substrate 10. However, it may be discharged to the adjacent transparent electrode, and not only the transparent electrode but also the display section 11 may be destroyed, resulting in a display failure in which intended display cannot be performed.

FIGS. 5 and 6 show the structure of a glass substrate in which static electricity, which causes the defect, is discharged to a portion other than the transparent electrode of the display unit to prevent the above defect. The glass substrate shown in FIGS. 5 and 6 is composed of a glass substrate 10 which is actually a product, and a non-product glass substrate 13 which is cut out after assembly and shown by a broken line. In the structure as shown in FIG. 5, the transparent electrode 12 is stretched and formed on the glass substrate 13 outside the product, and the short electrode 14 electrically connected to the transparent substrate 12 is further formed. , To discharge static electricity. Further, in the structure shown in FIG. 6, the pseudo short electrode 15 is formed at a predetermined distance from the extended end of the transparent electrode 12 to discharge static electricity.

[0004]

In the case of the above glass substrate as shown in FIG. 5, since the short electrode 14 is formed so as to conduct to all of the plurality of transparent electrodes, the open / close of each transparent electrode is prevented. There was a problem that short-circuit inspection could not be performed. In the case of FIG. 6, the open / short test is possible, but since the distance between the transparent electrode and the adjacent electrode and the distance between the pseudo short electrode 15 are almost the same, static electricity is discharged only to the pseudo short electrode 15. Was difficult. The present invention solves such a problem, discharges static electricity generated during manufacturing in a place that does not affect the display, and enables a smooth open / short inspection. It is intended to provide a substrate.

[0005]

In order to achieve the above object, the glass substrate of the liquid crystal display device of the present invention is a glass substrate for a liquid crystal display device in which liquid crystal is sealed between a pair of glass substrates. The first transparent electrode for display is provided.
And a second portion in which the display transparent electrode provided in the first portion is provided in a protruding manner, and a grounding transparent electrode facing the protruding display transparent electrode is provided. At least one of the ends of the second portion where the display transparent electrode and the grounding transparent electrode face each other has 0 ° <θ <180 ° or 180 ° <θ <360.
It is formed with an angle θ that is °. Further, the method for manufacturing a liquid crystal display device of the present invention is characterized in that a first portion provided with a display transparent electrode and the display transparent electrode provided in the first portion are provided in a protruding manner, and the protrusion is provided. The second transparent electrode for grounding is provided opposite to the transparent electrode for display.
And at least one of the ends of the second portion where the display transparent electrode and the grounding transparent electrode face each other is 0 ° <θ <180 ° or 180 ° <θ <3.
Regarding a glass substrate formed with an angle θ of 60 °, liquid crystal is sealed between a pair of the glass substrates, and then the second portion of each glass substrate is cut off.

[0006]

By doing so, even if the distance between the transparent electrode for grounding and the transparent electrode for display for discharging static electricity generated during manufacturing is about the same as the distance between the transparent electrodes for display, it is generated. The generated static electricity is surely discharged from the end of the display transparent electrode to the grounding transparent electrode.

[0007]

Embodiments of the present invention will now be described with reference to the drawings.
explain. FIG. 1 shows an example of a glass substrate of a liquid crystal display device embodying the present invention. The glass substrate of this embodiment includes a glass substrate 10 as a product and a non-product glass substrate 13 that is cut off after manufacturing. Reference numeral 20 is a transparent electrode for display, and a discharge terminal 20b for discharging static electricity is formed by extending the transparent electrode 20 onto the glass substrate 13 outside the product. Reference numeral 21 is a pseudo short electrode which is a discharge destination of the discharge terminal 20b. As shown in the figure, the end of the discharge terminal 20b on the pseudo short electrode 21 side has an angle of θ. θ is 0 ° <
In the range of θ <180 ° or 180 ° <θ <360 °, θ ≦ 90 ° is preferable. Adjacent transparent electrodes
Distance d1 between 20, discharge terminal 20b and pseudo short electrode 21
Even when the distance d2 between and is substantially equal to each other, the ends of the discharge terminals 20b are formed with an angle θ, so that the pseudo short electrode 21 is easily discharged. Further, since the discharge terminal 20b and the pseudo short electrode 21 are not electrically connected,
The open / short of the transparent electrode 20 can be electrically inspected.

FIG. 2 shows a second embodiment. In this, the same angle as that of the discharge terminal 20b is also provided on the pseudo short electrode 21 side. In the third embodiment shown in FIG. 3, the end of the discharge terminal 20b is flat, and an angle is provided only on the pseudo short electrode side.

After a liquid crystal is sealed between a pair of glass substrates as shown in FIGS. 1, 2 and 3, a polarizing plate or the like is arranged and assembled as a liquid crystal display device. After that, the glass substrate outside the product
A liquid crystal display device as a product can be obtained by cutting off 13 parts.

The present invention, for example, by the generation of static electricity, such as EL (electroluminescence) display,
The product is applicable to those affected.

[0011]

As described above, according to the present invention,
Static electricity generated during the manufacture of the liquid crystal display device can be reliably discharged to the grounding transparent electrode by the transparent electrode having a sharp tip, so that the static electricity does not adversely affect the display unit and the The display quality and the manufacturing yield can be improved. Further, since the transparent electrode and the grounding electrode are not electrically connected, the open / short inspection of the transparent electrode can be smoothly performed.

[Brief description of drawings]

FIG. 1 is a diagram showing a glass substrate of a liquid crystal display device embodying the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a diagram showing a third embodiment of the present invention.

FIG. 4 is a diagram showing a glass substrate of a conventional liquid crystal display device.

FIG. 5 is a view showing a conventional glass substrate for electrostatic discharge.

FIG. 6 is a diagram showing a conventional glass substrate for electrostatic discharge.

[Explanation of symbols]

 10 Glass substrate 11 Display unit 12 Transparent electrode 12a Voltage application terminal 13 Non-product glass substrate 14 Short electrode 15 Pseudo short electrode 20 Transparent electrode 20b Discharge terminal 21 Pseudo short electrode

Claims (2)

[Claims] 1. A glass substrate for a liquid crystal display device, wherein a liquid crystal is sealed between a pair of glass substrates, comprising: a first portion provided with a transparent electrode for display; A second portion provided with the transparent display electrode provided so as to project, and a transparent ground electrode provided opposite to the projected transparent electrode for display; At least one of the end portions of the transparent electrode for grounding and the grounding transparent electrode facing each other is 0 ° <θ <1
A glass substrate of a liquid crystal display device, wherein the glass substrate is formed with an angle θ of 80 ° or 180 ° <θ <360 °. 2. A first portion provided with a display transparent electrode, and the display transparent electrode provided on the first portion are provided so as to project, and face the projected display transparent electrode. A second portion provided with a grounding transparent electrode, and at least one end of the second portion where the display transparent electrode and the grounding transparent electrode face each other is 0 ° <θ <1.
Regarding a glass substrate formed with an angle θ of 80 ° or 180 ° <θ <360 °, after enclosing a liquid crystal between a pair of the glass substrates, the second portion of each glass substrate is removed. A method for manufacturing a liquid crystal display device, which comprises cutting off.