JPH05264943A - Cutting method for liquid crystal glass plate - Google Patents

Abstract

PURPOSE:To execute cutting without sealing a liquid crystal in a liquid crystal housing part, and also, to execute the cutting while preventing a dirty cutting liquid from flowing in the liquid crystal housing part by supplying a liquid into a gap between the upper and the lower glass, and cutting a liquid crystal glass plate by a cutting blade. CONSTITUTION:Prior to a cutting work, other liquid than a liquid crystal, for instance, pure water is injected from an injection part 3a into each liquid crystal housing part 3, and the cutting work is executed in a state that the part 3 is filled with this liquid. After a liquid crystal glass plate 1 is cut, moreover, only the upper glass plate 1a is cut along a line a little outside the peripheral edge of a seal material 2 in order to expose a wiring pad part 4 to the outside, and each liquid crystal plate is formed. As for the liquid crystal plate formed in such a way, other liquid than the liquid crystal still fills the liquid crystal housing part 3 as it is, therefore the part 3 is made empty by discharging the liquid, and thereafter, by injecting the liquid crystal from the injection port 3a and closing it injection port 3a, the inside of the liquid crystal housing part 3 is sealed with the liquid crystal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting a liquid crystal glass plate.

[0002]

2. Description of the Related Art Generally, a relatively large size liquid crystal glass plate in which liquid crystal is sealed between an upper glass and a lower glass is cut into a plurality of liquid crystal plates along a predetermined cutting line. The cutting blade is used while supplying the cutting fluid. In the work of cutting the liquid crystal glass plate, if a defective product is generated, the liquid crystal sealed in the liquid crystal storage portion is wasted. To avoid such waste, the liquid crystal glass plate can be cut in an empty state in which the liquid crystal is not sealed, but dirty cutting fluid flows from the liquid crystal inlet provided in the liquid crystal storage part, and the liquid crystal is cut after cutting. Can no longer be injected. Therefore, the liquid crystal had to be sealed and cut first.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and cuts liquid crystal without sealing it in the liquid crystal storage portion, and does not allow dirty cutting fluid to flow in. It is an object of the present invention to provide a method for cutting a liquid crystal glass plate that can be cut.

[0004]

As a means for technically solving this problem, the present invention is composed of an upper glass plate and a lower glass plate, and cuts a liquid crystal glass plate before liquid crystal is sealed. The method is to supply a liquid instead of the liquid crystal to the gap formed by the upper and lower plate glasses, and to cut the liquid crystal glass plate with a cutting blade while supplying the cutting liquid. Further, the gist is that the liquid is pure water and the cutting blade is a circular rotary blade.

[0005]

[Operation] Since an appropriate liquid such as pure water is injected instead of the liquid crystal, the cutting fluid that is dirty at the time of cutting cannot enter the liquid crystal storage portion, and the liquid is cut while it is sealed. Even if a defective product is produced, the liquid crystal is not sealed so that the liquid crystal can be wasted. After cutting, if the liquid is removed by evaporation or the like and then the liquid crystal is injected, the desired liquid crystal plate can be obtained.

[0006]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In FIG. 1, reference numeral 1 is a relatively large-sized liquid crystal glass plate, which is composed of an upper glass plate 1a and a lower glass plate 1b as shown in FIG.
A plurality of liquid crystal storage portions 3 are formed surrounded by, and each of the liquid crystal storage portions 3 is provided with an injection port 3a.

A wiring pad portion 4 is formed on the upper surface of the lower glass 1b so as to be positioned on three sides around the liquid crystal storage portion 3.

Reference numeral 5 is a cross-shaped alignment mark provided in a key portion of the liquid crystal glass plate 1. Based on this alignment mark 5, a cut position is precisely positioned, and as shown in FIG. While supplying the cutting fluid 7, the liquid crystal glass plate 1 is cut by a cutting blade 6 such as a circular rotary blade.
Disconnect.

Before the cutting work, each of the liquid crystal storage portions 3 is
A liquid other than liquid crystal, such as pure water, is filled in the inlet 3a.
And the cutting operation is performed in a state of being filled with this liquid (which does not leak because the injection port 3a is small). This is to prevent the cutting fluid supplied at the time of cutting from entering the liquid crystal storage unit 3. In other words, if the liquid crystal storage unit 3 is cut while it is empty, dirty cutting fluid will enter, which is to prevent it.

After cutting the liquid crystal glass plate 1, in order to further expose the wiring pad portion 4 to the outside, only the upper glass plate 1a is cut along a line slightly outside the outer peripheral edge of the sealing material 2. To form each liquid crystal plate.

In the liquid crystal plate thus formed, the liquid crystal storage portion 3 is still filled with a liquid other than the liquid crystal. Therefore, after the liquid is drained and completely emptied, Liquid crystal is injected from the inlet 3a and the inlet 3a is closed to seal the liquid crystal in the liquid crystal housing 3.

As a result, the intended liquid crystal plate can be obtained. However, even if a glass breakage occurs when the liquid crystal glass plate is cut and a defective product is produced, the liquid crystal is sealed in the liquid crystal plate. No expensive liquid crystal is wasted because it is filled with liquid other than liquid crystal such as pure water.

In order to remove the liquid from the inside of the liquid crystal storage unit 3, for example, means for evaporating the liquid by heating is the simplest, and means for sucking and removing the liquid to the outside is also conceivable. It is necessary to dry the water adhering to the wall surface.

The present invention is not limited to the case of cutting a plurality of liquid crystal plates from a relatively large size liquid crystal glass plate, and is also applied to the case of cutting a single liquid crystal plate from one liquid crystal glass plate. It is possible.

[0015]

As described above, according to the present invention,
When cutting the liquid crystal glass plate to form the liquid crystal plate, it is a method of cutting when the liquid crystal storage part is filled with a liquid other than liquid crystal such as pure water, so even if a defective product occurs at the time of cutting, the liquid crystal It is not wasteful, and the cutting fluid that is soiled at the time of cutting does not flow into the liquid crystal housing portion, and the liquid is removed after cutting and easily replaced with liquid crystal.

[Brief description of drawings]

FIG. 1 is a plan view of a liquid crystal glass plate before cutting.

FIG. 2 is a front view of the same.

FIG. 3 is an explanatory diagram showing a state when the liquid crystal glass plate is cut.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Liquid crystal glass plate 1a ... Upper glass plate 1b ... Lower glass plate 2 ... Sealing material 3 ... Liquid crystal storage part 3
a ... injection port 4 ... wiring pad part 5 ... alignment mark 6 ... cutting blade 7 ... cutting fluid

Claims (2)

[Claims] 1. A cutting method for cutting a liquid crystal glass plate which is composed of upper and lower glass plates and before liquid crystal is sealed, wherein liquid crystal is replaced in the gap formed by the upper and lower plate glasses. A method for cutting a liquid crystal glass plate, in which a liquid is supplied and a cutting blade is used to cut the liquid crystal glass plate while supplying a cutting liquid. 2. The method for cutting a liquid crystal glass plate according to claim 1, wherein the liquid is pure water and the cutting blade is a circular rotary blade.