JPH08320460A - Production of liquid crystal panel and device for scribing glass substrate - Google Patents

Abstract

PURPOSE: To improve productivity by making it possible to obtain surely cracked surfaces free from skirts and chipping and to efficiently arrange many liquid crystal cells with decreased crops with large-sized glass substrates in a cracking stage by pressing with a roll body to additionally increase the depth of cracks at scribing lines. CONSTITUTION: The plural liquid crystal panels are produced by cracking a liquid crystal panel body 1 formed by arranging liquid crystals between the two sheets of upper and lower glass substrates 3 and 4 and forming plural display areas. At this time, the cracks 8 are put on the surface of the one glass substrate 3 by marking with a cutter. The cracked surface is then heated to deepen the cracks 8 and thereafter, the surface of the other glass substrate 4 is pressed, by which the liquid crystal panel body is cracked for each of the respective display areas and the plural liquid crystal panels are produced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal panel manufacturing method and a glass substrate scribing apparatus.

[0002]

2. Description of the Related Art In recent years, liquid crystal panels have been mass-produced, and a process of forming a large number of liquid crystal panels on a large glass substrate and treating them collectively has been introduced to improve productivity.

For this reason, as shown in FIG. 8, a configuration is adopted in which as many liquid crystal panels 51 as possible are arranged in one large glass substrate 52, which leads to a display portion of the liquid crystal panel or a wiring lead-out. The end material portion, which is an unnecessary portion other than the portion, is becoming smaller and smaller. Therefore, in the cleaving work for cleaving a large number of liquid crystal panels 51 from a large glass substrate 52, high cleaving accuracy in a narrow area is required.

The size of this cleaving area is conventionally 6 to 10.
Since it was a cutting operation of the end material having a relatively wide width of mm, for example, as shown in FIG. 9, the surface of the upper glass substrate 53 of the liquid crystal cell composed of the upper and lower glass substrates 53 and 54 is coated with super steel or Ruled line 55 with diamond sintering cutter 61
Then, as shown in FIG. 10, the pressing roller body 62 made of hard rubber or the like is pressed (pressed) from above the surface on the opposite side where the score lines 55 are inserted, and is positioned on the lower side. The glass substrate 53 to be cut is cut, and then, like the upper glass substrate 53, the lower glass substrate 54 is cut with the cutter 6.
After performing the scoring with 1 and pressing with the pressing roller body 62 to perform the cutting, as shown in FIG.
Was getting

[0005]

However, according to the above-described conventional manufacturing method, it is not possible to further improve the productivity or obtain a narrow frame which makes the panel size other than the liquid crystal cell compact, and it is possible to reduce the size of the end material. As for the width,
2-3mm is required.

[0006] When the width of the scrap material is such, the cut surface other than the scored portion of the cutter is cut, or the cut surface called a skirt is not cut perpendicularly to the glass surface but becomes oblique and the accuracy of the external dimension is increased. Defects and chipping of terminals in the wiring part will occur.

In order to prevent the occurrence of such a defect, there is a drawback in that it is necessary to adjust the cutting depth of the cutter, adjust the pressing force of the pressing roll body, and set delicate conditions. .

Further, there is a problem that the cutting depth of the cutter tends to vary due to the warp of the glass substrate, wear of the blade of the cutter, and the like, and thus a cutting failure occurs at a portion having a small cutting depth.

[0009]

In order to solve the above problems, in the method of manufacturing a liquid crystal panel of the present invention, liquid crystal is arranged between upper and lower two glass substrates and a plurality of display areas are formed. When manufacturing multiple liquid crystal panels by cutting the liquid crystal panel body that consists of the above, the surface of one of the upper and lower glass substrates is marked with a cutter to make a crack, and then the cracked surface is heated. Then, after deepening the cracks, the surface on the opposite side is pressed to cut each display area to obtain a plurality of liquid crystal panels.

In order to solve the above problems, the glass substrate scribing apparatus of the present invention is provided with a table for mounting the glass substrate on the lower portion of the apparatus body, and the table on the upper portion of the apparatus body,
A cutter for marking the surface of the glass substrate placed on the table to make a crack is provided, and a heating means for heating the surface of the glass substrate cracked by the cutter is provided.

[0011]

According to the above manufacturing method and the structure of the scribing apparatus, since the marking surface of the glass substrate constituting the liquid crystal panel body is heated, the marking surface is stretched and the marking surface side is warped in a convex shape. Due to this warpage, the scribe portion is stretched, and the depth of the crack introduced in the first scribe is further increased.

Therefore, a reliable fractured surface without a skirt or a chip can be obtained in a fractured step by pressing the roller body which is a later step.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the liquid crystal panel manufacturing method and liquid crystal panel scribing apparatus of the present invention will be described below with reference to the drawings.

First, the structure of the liquid crystal panel will be described. In FIGS. 4 and 5, reference numeral 1 denotes a large liquid crystal panel body, and a large number of liquid crystal panels 2 (2A, 2A, each having a display area are shown in FIG. 4).
2B, 2C, 2D) are formed at one time.

This liquid crystal panel body 1 has an upper first glass substrate (generally provided with a color filter) 3
And the lower second glass substrate (generally a TFT transistor is formed) 4 and both glass substrates 3,
The glass substrates 3 and 4 are bonded to each other by a seal adhesive 6 made of epoxy or UV resin.

Next, after scribing a predetermined position on the surface of the liquid crystal panel body 1 by a scribing device, the part of the scribing line 7 is pressed by a break device to be cut, whereby a plurality of liquid crystal panels 2 are formed. A method of simultaneously manufacturing the above will be described.

First, the scribing apparatus will be described with reference to FIGS.
It will be explained based on. The scribing device 11 includes a device body 12, a movable body 14 movably provided in a predetermined direction by a guide member 13 arranged at a bottom portion of the device body 12, and an upper portion of the movable body 14 in a horizontal plane. The rotary table 15 is rotatably provided and on which the liquid crystal panel body 1 is placed, and the surface, that is, the lower surface of the liquid crystal panel body 1 provided inside the turntable 15 and placed on the upper surface thereof is heated. Heating heater (an example of heating means, specifically, a coil heater is used) 16
Similarly, lifting pins 17 for lifting the liquid crystal panel body 1 mounted on the upper surface of the rotary table 15 at four positions, and the upper frame portion 11a of the apparatus main body 12 and the movable body 14 are provided. A rotary screw shaft body 18 arranged in a direction perpendicular to the moving direction, a moving body 19 screwed to the rotary screw shaft body 18, and a movable body 19 which is attached to the movable body 19 so as to be movable up and down, for example, via a cylinder device or the like. Rotating table 1
5. A circular cutter (for example, one provided with a diamond blade on the outer periphery) 20 for inserting the marking lines 7 on the surface of the liquid crystal panel body 1 on 5, and a liquid crystal panel on the rotary table 15 provided on the apparatus main body 12 side. It is composed of a cooling air blowing nozzle 21 that blows compressed air onto the surface of the body 1 for cooling.

Although not shown, movement of the movable body 14,
Drive devices for rotating the rotary table 15 are provided respectively. The scribing device 11 is provided with a reversing device (not shown) that holds the liquid crystal panel body 1 lifted by the lifting pins 17 and reverses (turns it over).

For example, this reversing device is composed of a robot arm for gripping the lifted liquid crystal panel body 1 and a reversing stand for mounting and reversing the liquid crystal panel body 1 held by the robot arm. . Of course, the liquid crystal panel body 1 may be held by the robot arm and inverted as it is.

Further, as shown in FIG. 3, the liquid crystal panel body 1
The break device 31 for breaking (breaking) is arranged at the lower part of the device main body 32, and the scribing device 11 is used to form the score lines 7.
The mounting table 33 on which the liquid crystal panel body 1 with the (cracks 8) is mounted is provided, and the mounting table 3 is provided on the upper part of the apparatus main body 32.
A pressing roller body (for example, an elastic material such as hard rubber) that presses (presses) the surface of the liquid crystal panel body 1 placed with the surface having the score lines 7 (cracks 8) in 3 as the upper side. (Constituted by) and 34. The mounting table 33 is configured to be movable in a predetermined direction and rotatable in a horizontal plane, similarly to the rotary table 15 in the scribing device 11, and the pressing roller body 3 is also included.
4 is also attached to a movable body 35 that is provided so as to be movable in a predetermined direction, and is moved, for example, via a cylinder device or the like so as to press the surface of the liquid crystal panel body 1 mounted on the mounting table 33. It is attached to the body 35 side.

Next, the cleaving work of the large liquid crystal panel body 1 will be described. First, the liquid crystal panel body 1 is placed on the rotary table 15 of the scribing device 11, and the cutter 20 is moved to a predetermined position via the rotary screw shaft body 18 so that the liquid crystal panel 2 having a predetermined size can be obtained. After that, the movable body 14 is moved in a predetermined direction while being pressed against the surface with a predetermined force, and the score lines 7 are formed on the surface of the first glass substrate 3 on the upper side of the liquid crystal panel body 1 to a predetermined depth. A crack 8 is generated.

After repeating this operation and inserting a predetermined number of score lines 7 or cracks 8, the rotary table 15 is moved to 90.
The creases 8 are rotated at a predetermined angle so that the crease lines 7 are inserted at predetermined positions so as to be orthogonal to the crease lines 7 described above, and cracks 8 are generated (see FIG. 4).

Next, the liquid crystal panel body 1 is raised by the lifting pins 17, the liquid crystal panel body 1 is inverted by the reversing device, and then the liquid crystal panel body 1 is returned onto the rotary table 15.

At this time, the surface of the liquid crystal panel 1 on which the cracks 8 are formed is on the lower side. In this state, power is supplied to the heater 16 to heat the surface to 60 ° C to 80 ° C. And the opposite surface (second glass substrate 4
The cooling air is sprayed from the cooling air spray nozzle 21 to the side). In this way, when the lower surface of the liquid crystal panel body 1 is heated and the upper surface is cooled, the liquid crystal panel body 1 located on the lower side is
As shown in FIG. 6, due to the thermal expansion of the glass substrate 3, a warp is generated in a convex shape on the entire liquid crystal panel body 1, and the warp further deepens the crack 8 generated by the marking.

The amount of warp is about 5 mm at maximum depending on the setting of the heating temperature and the heating time. For example, according to experiments, a good amount of warping can be obtained when the heating temperature is 60 ° C. to 80 ° C. and the heating time is 10 seconds. It was

However, the heating conditions differ depending on the thickness of the glass substrate, the heat history of the glass substrate, etc., and are not limited to the above conditions. Further, since the liquid crystal panel body 1 is uniformly warped, the cracks 8 are formed substantially uniformly in the direction perpendicular to the score lines 7 (toward the surface on the opposite side of the glass substrate).

Next, the liquid crystal panel body 1 is moved to the break device 31, and the pressing roller body 34 is pressed (pressed) from above along the score lines 7 to cut the first glass substrate 3. In this way, since the surface of the glass substrate 3 is heated and the surface of the glass substrate 4 on the opposite side is cooled after the scoring line 7 is inserted, the crack 8 caused by the scoring line 7 firstly inserted Since deep cracks are formed, therefore, what was conventionally cleaved with a strong pressing force can be cleaved with a pressing force of about half, and the cleaving section can be accurately cleaved without forming an inclined surface called a skirt.

Next, in order to make each liquid crystal panel 2,
The second glass substrate 4 is also cut through the same steps as the first glass substrate 3. That is, the individual liquid crystal panels 2 can be accurately obtained.

By the way, in the above embodiment, one surface of the liquid crystal panel body 1 is heated and the other surface is cooled, but the liquid crystal panel body 1 is cut even if it is not cooled. It can be done accurately.

Further, in the above embodiment, only the heater is used as the heating means, but as shown in FIG. 7, for example, the scribing device 31 is provided with the warm air heater 41 in addition to the heater 16 to provide a high temperature heater. Air of liquid crystal panel body 1
It is also possible to generate a warp by spraying the glass substrate. In this case, as described in the above embodiment, it is not necessary to turn over the liquid crystal panel body 1 in order to bring the surface with the marking lines in contact with the surface of the rotary table 15 in which the heater 16 is incorporated.

Further, in this case, the heating power source of the warm air heater 41 is stopped and only the air is blown, so that the upper surface side of the liquid crystal panel body 1 whose lower surface side is heated by the heating heater 16 is cooled as it is. can do.

[0032]

According to the above-described manufacturing method and scribing apparatus of the present invention, since the marking surface of the glass substrate constituting the liquid crystal panel body is heated, elongation occurs on the marking surface,
The scribed side warps in a convex shape. Due to this warpage, the scribe portion is stretched, and the depth of the crack introduced in the first scribe is further increased.

That is, since a reliable fractured surface without a skirt or a chip is obtained in a fracture step by pressing a roll body which is a later step, a large number of efficient liquid crystal cells with a small amount of scrap material can be obtained on a large glass substrate. Can be arranged, and therefore, a compact liquid crystal panel having a narrow frame can be obtained, so that productivity can be improved.

Further, since the glass substrate heating means is provided in the scribing device, more reliable scoring, that is, deeper cracks can be generated.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a scribing device according to an embodiment of the present invention.

FIG. 2 is a front view of a scribing device in the example.

FIG. 3 is a front view of the break device according to the embodiment.

FIG. 4 is a plan view of a liquid crystal panel body in the example.

FIG. 5 is a front view of a liquid crystal panel body in the example.

FIG. 6 is a front view showing a heated state of the liquid crystal panel body in the example.

FIG. 7 is a front view showing a modified example of the scribing device of the present invention.

FIG. 8 is a plan view of a liquid crystal panel body for explaining a method of manufacturing a liquid crystal panel in a conventional example.

FIG. 9 is a front view of a liquid crystal panel body for explaining a method of manufacturing a liquid crystal panel in a conventional example.

FIG. 10 is a front view of a liquid crystal panel body for explaining a method for manufacturing a liquid crystal panel in a conventional example.

FIG. 11 is a front view of a liquid crystal panel body for explaining a method for manufacturing a liquid crystal panel in a conventional example.

[Explanation of symbols]

 1 Liquid Crystal Panel Body 2 Liquid Crystal Panel 3 First Glass Substrate 4 Second Glass Substrate 7 Ruled Line 8 Crack 11 Scribing Device 15 Rotating Table 16 Heating Heater 19 Moving Body 20 Cutter 21 Cooling Air Spray Nozzle 31 Break Device

Claims (4)

[Claims] 1. When manufacturing a plurality of liquid crystal panels by cutting a liquid crystal panel body in which liquid crystal is arranged between two upper and lower glass substrates and a plurality of display areas are formed, either The surface of one of the glass substrates is scored with a cutter to make a crack, and then the cracked surface is heated to deepen the crack, and then the opposite surface is pressed to display each display area. A method for manufacturing a liquid crystal panel, characterized in that a plurality of liquid crystal panels are obtained by cleaving. 2. The method for producing a liquid crystal panel according to claim 1, wherein the surface of the glass substrate opposite to the surface having cracks is cooled. 3. A table on which a glass substrate is placed is provided in the lower part of the device body, and a cutter for marking the surface of the glass substrate placed on the table to make a crack is provided on the upper part of the device body, and the cutter is also provided. A scribing device for a glass substrate, characterized by comprising heating means for heating the surface of the glass substrate in which cracks have been made. 4. The glass substrate scribing device according to claim 3, further comprising cooling means for cooling the surface of the glass substrate placed on the table.