KR20070077996A - Apparatus and method for scribing glass substrate with polarizer attached thereto - Google Patents

Abstract

An apparatus of scribing a glass substrate with a polarizing panel combined thereto is provide to prevent generation of impurities from the polarizing panel while cutting the glass substrate by fabricating a laser beam emitting device, a stand to support the glass substrate and a coolant injection device to cool sites underwent the laser beam emission. The apparatus consists of: a stand(30) for supporting a glass substrate(20) combined with a polarizing panel(10); a laser beam emitting device(40) that is arranged to move relative to the stand; and a coolant injection device(50) to quench parts to be emitted by the laser beam. The stand is fixed while the laser beam emitting device is movable relative to the stand. Alternatively, the laser beam emitting device is fixed while the stand is movable relative to the device. The coolant injection device follows the laser beam emitting device. Multiple laser beam emitting devices are aligned in parallel to multiple coolant injection devices at constant intervals.

Description

Apparatus and method for cutting a glass substrate with a polarizing plate {APPARATUS AND METHOD FOR SCRIBING GLASS SUBSTRATE WITH POLARIZER ATTACHED THERETO}

1 is a schematic perspective view of an apparatus for cutting a glass substrate with a polarizing plate according to an embodiment of the present invention.

2 is a cross-sectional view taken along the line A-A of FIG.

3 is a sectional view of a glass substrate completely cut by a laser beam;

4 is a schematic perspective view of an apparatus for cutting a glass substrate with a polarizing plate according to another embodiment of the present invention.

※ Explanation of code for main member of drawing ※

10: polarizing plate 15: cut line

20: glass substrate 30: mounting table

40: laser beam supply means 41: laser beam

50: refrigerant injection means

The present invention relates to a method and apparatus for cutting a glass substrate with a polarizing plate, and more particularly, to an apparatus and method for cutting a glass substrate with a polarizing plate using a laser.

In general, a liquid crystal display device displays a desired image on a screen by adjusting the amount of light transmitted according to an image signal applied to a plurality of control switches arranged in a matrix form, and displaying a color filter substrate and a thin film transistor (TFT). A liquid crystal display panel for directly displaying an image including a liquid crystal between the substrates, a liquid crystal display panel driver IC for operating the liquid crystal display panel, a backlight unit used as a light source of the liquid crystal display device, and each component of the liquid crystal display device. It consists of a chassis for fastening to one, in order to electrically connect the thin film transistor substrate and the color filter substrate, a short is formed between both substrates.

In the manufacturing process of the liquid crystal display device, the glass substrate is cut into a plurality of unit liquid crystal display panels, and then a polarizing plate is attached. Therefore, a method of attaching a polarizing plate to each unit liquid crystal display panel has been added to increase the process time, and workability is poor. Thus, a method of cutting a glass substrate having a polarizing plate attached thereto has been developed.

In Korean Laid-Open Patent Publication No. 2005-43770, a peeling groove is formed in a polarizing plate using a peeling cutter on a glass substrate on which a polarizing plate is formed, and then a scribe mark (crack) is applied to the glass substrate exposed by the peeling groove using a cutter wheel. And a method of cutting a glass substrate bottom by pressing with a pressing means.

However, this problem of the prior art has a problem that the peeled polarizing plate and the foreign material is not completely removed when forming the peeling groove using the peeling cutter, causing the defect of the cutter wheel, and also difficult to cleanly cut the glass substrate have.

Accordingly, an object of the present invention is to provide an apparatus and method for cutting a glass substrate having a polarizing plate attached thereto by using a laser such that foreign matters are not generated from the polarizing plate.

The cutting device of the glass substrate with a polarizing plate which concerns on this invention is a mounting base which supports the glass substrate with a polarizing plate, the laser beam supply means arrange | positioned so that relative movement with respect to the mounting table, and the position to which the laser beam was irradiated Refrigerant injection means for cooling the.

Here, the mounting table is fixed, the laser beam supply means may be movable. In addition, the laser beam supply means is fixed, the mounting table may be movable. The refrigerant injection means follows the laser beam supply means. The laser beam supply means and the refrigerant injection means may be integrally formed with a predetermined distance apart. A plurality of the laser beam supply means and the refrigerant injection means are arranged side by side at a predetermined interval.

The method for cutting a glass substrate with a polarizing plate according to the present invention includes providing a glass substrate with a polarizing plate and irradiating a laser beam across the glass substrate.

A notch is formed on the glass substrate before the laser beam irradiation step. The method for cutting a glass substrate with a polarizing plate according to the present invention may further include cooling the position where the laser beam is irradiated. Irradiating the laser beam may be performed above and below the glass substrate.

Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention in more detail. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various forms, and the present embodiments merely make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention pertains. It is provided to fully inform the person of the scope of the invention. Like numbers refer to like elements in the drawings.

First, before explaining the apparatus and method for cutting a glass substrate with a polarizing plate according to the present invention, a brief look at the internal structure of the glass substrate 20 with a polarizing plate, the glass substrate 20 and the color filter substrate It is composed of a thin film transistor substrate. A black matrix, a color filter, and a common electrode are sequentially formed on the color filter substrate. The black matrix is formed between the color filter and the pixel to block light leakage, and the color filter is formed of a resin film including dyes or pigments of three basic colors (red, green, and blue), and the common electrode. Is an electrode formed of ITO or the like which is a transparent electric conductor, and applies a voltage to the liquid crystal cell.

The thin film transistor substrate includes a thin film transistor which is a switching element for applying and blocking a signal voltage to a liquid crystal, a pixel electrode which is formed of transparent and electrically conductive ITO to apply a signal voltage applied to the thin film transistor to a liquid crystal cell, and the pixel electrode. A storage capacitor is formed to maintain the signal voltage applied to the device for a predetermined time. A thin organic film made of polyimide is formed on an uppermost layer of the color filter substrate and the thin film transistor substrate, and an alignment layer for aligning liquid crystals is formed, and a spacer for securing a space between the two substrates is provided between the upper substrate and the lower substrate. The liquid crystal layer is injected into the space provided by the spacer. A seal pattern is formed at the periphery of the liquid crystal panel to fix the color filter substrate and the thin film transistor substrate. Shorts are disposed outside the seal pattern, and the shorts electrically connect the two substrates. Polarizing plates are attached to the outer surface of both substrates. The glass substrate thus manufactured is cut into unit liquid crystal display panels of various sizes depending on the product by the cutting device of the glass substrate with a polarizing plate according to the present invention.

1 is a schematic perspective view of an apparatus for cutting a glass substrate with a polarizing plate according to an embodiment of the present invention.

Referring to FIG. 1, the glass substrate cutting device includes a mounting table 30 for supporting a glass substrate 20 to which a polarizing plate 10 is attached, and a laser beam supply means movably disposed on the mounting table 30. 40 and a refrigerant injection means 50 provided spaced apart from the laser beam supply means 40 by a predetermined interval.

The mounting table 30 supports the glass substrate 20 and is rotatable by an appropriate rotation driving means (not shown).

The laser beam supply means 40 is composed of a laser beam supply part, a reflector and a dust collecting lens. The laser beam supply means 40 proceeds in the direction of the arrow in FIG. 1 to irradiate a laser beam 41 having a predetermined magnitude of energy to melt the polarizing plate 10 attached to the glass substrate 20 and to dissolve the glass substrate 20. ) Is cut into a unit liquid crystal display panel. The polarizing plate 10 of the laser beam and the cutting performance of the glass substrate 20 may be controlled by the energy of the laser beam 41 and the scanning speed and amount of the laser beam supply means 40.

The coolant spray means 50 is spaced apart from the laser beam supply means 40 at a predetermined interval to cool the glass substrate 20 heated by the laser beam 41 supplied from the laser beam supply means 40. . That is, the polarizing plate 10 is melted by the laser beam 41 and the glass substrate 20 is cut. In this case, the glass substrate 20 to which the laser beam 41 is irradiated is heated by the laser beam 41. Therefore, the glass substrate 20 is cooled by injecting a coolant such as air or acetone.

In FIG. 1, the laser beam supply means 40 and the coolant spray means 50 are shown to be moved independently. However, the present invention is not limited thereto, and the laser beam supply means 40 and the coolant spray are made using an appropriate connection member. By connecting the means 50, they may be integrally moved at a predetermined distance apart.

Before cutting the glass substrate 20 to which the polarizing plate 10 is attached, the notch 15 formed along the line to be cut is formed on the polarizing plate 10 of the glass substrate 20 supported on the mounting table 30. This can be formed. The notch 15 is generally formed at the beginning or end of the glass substrate 20 to which the polarizing plate 10 to be cut is attached using a diamond wheel.

2 is a cross-sectional view taken along the line A-A of FIG. Referring to FIG. 2, the laser beam 41 irradiated from the laser beam supply means 40 first melts the polarizing plate 10 and then cuts the glass substrate 20 into a unit liquid crystal display panel. Thereafter, the glass substrate 20 heated by the laser beam 41 is cooled by the refrigerant injected from the refrigerant injection means.

3 is a cross-sectional view of the glass substrate completely cut by the laser beam. Referring to FIG. 3, the energy of the laser beam supply unit of the laser beam supply unit may be properly adjusted to completely cut the glass substrate 20 with the polarizing plate 10 into a unit liquid crystal display panel.

4 is a schematic perspective view of an apparatus for cutting a glass substrate with a polarizing plate according to another embodiment of the present invention.

Referring to FIG. 4, a device for cutting the glass substrate 20 to which the polarizing plate 10 is attached includes a plurality of laser beam supply means 40 and a refrigerant spray spaced apart from the laser beam supply means 40 by a predetermined interval. Means 50, which are identical to the embodiment shown in FIG. 1 except that they are arranged side by side at regular intervals. Due to the plurality of laser beam supply means 40 and the refrigerant injection means 50, the glass substrate 20 to which the polarizer 10 is attached may be cut more quickly.

In the embodiment according to the present invention, the laser beam supply means and the coolant spraying means move to cut the glass substrate with the polarizing plate into a unit liquid crystal display panel. However, the present invention is not limited thereto, and the laser beam supplying means and the coolant spraying means are fixed. The glass substrate may be cut into a unit liquid crystal display panel by moving the glass substrate or the mounting table in the attached state.

Hereinafter, the cutting method of the glass substrate which concerns on this invention is demonstrated.

First, the glass substrate with a polarizing plate is mounted on a mounting table. A notch is then formed on the glass substrate, the polarizing plate is melted with the laser beam irradiated from the laser beam supply means and the substrate is cut. In addition, the coolant from the coolant spray means provided at a predetermined interval away from the laser beam supply means cools the substrate heated by the laser beam. As a result, the glass substrate with the polarizing plate may be cut into the unit liquid crystal display panel.

In the above embodiment, the cutting device is provided on the glass substrate, but the present invention is not limited thereto. When the size of the upper color filter substrate and the lower transistor substrate are different from each other, the cutting device is also provided on the lower portion of the glass substrate to have different sizes. The upper and lower glass substrates can also be cut by

What has been described above is merely an exemplary embodiment of a glass substrate cutting device and method with a polarizing plate according to the present invention, the present invention is not limited to the above-described embodiment, as claimed in the following claims, Without departing from the gist of the present invention, any person having ordinary knowledge in the field of the present invention will have the technical spirit of the present invention to the extent that various modifications can be made.

Therefore, by providing the apparatus and the method which cut | disconnect the glass substrate with a polarizing plate using a laser by this invention, a foreign material does not generate | occur | produce from a polarizing plate.

In addition, according to the present invention, the time required for manufacturing the liquid crystal display device can be shortened by cutting the glass substrate with a polarizing plate using a laser.

Claims (10)

In the cutting device of a glass substrate with a polarizing plate, A mounting table for supporting the glass substrate having the polarizing plate attached thereto; Laser beam supply means arranged to be movable relative to the mounting table; And Refrigerant injection means for cooling the position irradiated with the laser beam, characterized in that Cutting device of a glass substrate with a polarizing plate. The method according to claim 1, The mounting table is fixed, characterized in that the laser beam supply means is movable, Cutting device of a glass substrate with a polarizing plate. The method according to claim 1, The laser beam supply means is fixed, characterized in that the mounting table is movable, Cutting device of a glass substrate with a polarizing plate. The method according to claim 1, Characterized in that the coolant spray means follows the laser beam supply means, Cutting device of a glass substrate with a polarizing plate. The method according to claim 4, The laser beam supply means and the refrigerant injection means is characterized in that formed integrally spaced apart a predetermined distance, Cutting device of a glass substrate with a polarizing plate. The method according to claim 1, The laser beam supply means and the refrigerant injection means is characterized in that the plurality is arranged side by side at a predetermined interval, Cutting device of a glass substrate with a polarizing plate. As a cutting method of the glass substrate with a polarizing plate, Providing a glass substrate having a polarizing plate attached thereto; And Irradiating a laser beam across the glass substrate, The cutting method of the glass substrate with a polarizing plate. The method according to claim 7, Characterized in that it further comprises the step of forming a notch on the glass substrate before the laser beam irradiation step, The cutting method of the glass substrate with a polarizing plate. The method according to claim 7 or 8, Characterized in that it further comprises the step of cooling the laser beam is irradiated, The cutting method of the glass substrate with a polarizing plate. The method according to claim 7, Irradiating the laser beam is characterized in that it is performed above and below the glass substrate, The cutting method of the glass substrate with a polarizing plate.

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