JPH1138399A - Method for polishing liquid crystal display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for newly manufacturing a waterproofing jig even if the size, etc., of a liquid crystal display panel is changed, and to prevent the infiltration of water into mounted parts for the liquid crystal display panel. SOLUTION: The liquid crystal display panel 4 with glass substrates flawed in the production stage of liquid crystal display devices is set on a panel setting stage 16 mounted to the polishing apparatus after both centers are visually aligned, and such and fixed. Next, the waterproofing jig is set on the sucked and fixed liquid crystal display panel 4 after both centers are visually aligned, and sucked and fixed. Rubber 7 mounted on the contact surface of a vacuum picture frame 1 with the liquid crystal display panel 4 is brought into tight contact with the surface of the liquid crystal display panel 4 in compliance with its surface shape by attracting and fixing the waterproofing jig, there by, the spacing of the contact surface between the liquid crystal display panel 4 and the rubber 7 is eliminated and waterproofing is made possible. The flaws of the liquid crystal display panel 4 are polished away by using a polishing means consisting of a felt wheel 14 formed of wool, etc., and rotational driving means 15 for rotating the felt wheel 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for polishing a liquid crystal display panel, and more particularly to a method for polishing a liquid crystal display panel by polishing and removing scratches on the liquid crystal display panel using an abrasive and water. is there.

[0002]

2. Description of the Related Art In the manufacturing process of a liquid crystal display device, the surface of a glass substrate constituting a liquid crystal display panel may be damaged during various devices or during transportation.

For example, when a foreign substance such as dust adheres to a liquid crystal display panel, when a polarizing plate is pasted as it is, display quality is deteriorated by a lighting inspection, and the polarizing plate pasted on the liquid crystal display panel is removed. A rework operation is performed in which the liquid crystal display panel is cleaned using a dedicated device or jig, and the polarizing plate is attached again.
However, during the reworking operation of the polarizing plate peeling operation, as shown in FIG. 7A, the foreign matter 18 between the liquid crystal display panel 4 and the polarizing plate 26 is moved to the position shown in FIG. As shown in the drawing, the liquid crystal display panel 4 is scratched at the same time when the polarizing plate 26 is peeled off, and a streak-like scratch 19 may be formed on the liquid crystal display panel 4 as shown in FIG.

If the scratches 19 are formed on the liquid crystal display panel 4 as described above, the display quality of the liquid crystal display panel 4 becomes poor. Therefore, the scratches 19 are removed by polishing using an abrasive and water. Thus, the defect caused by the scratch 19 is corrected.

[0005] In such wet polishing, as shown in FIGS. 9 and 10, circuit components and the like mounted on the liquid crystal display panel 4 are wetted using a waterproof jig using a rubber packing 20. Not waterproof.

The lid plate 21 includes a pin 22 for positioning the liquid crystal display panel 4, a rubber packing 20 for waterproofing, a concave portion 27 for avoiding interference with circuit components mounted on the liquid crystal display panel 4, and a bottom plate 23. It is composed of a snap lock 24 for opening and closing with the lid plate 21 and sealing. This lid plate 21
After positioning the liquid crystal display panel 4 with the pins 22, the liquid crystal display panel 4 is placed, and a bottom plate 23 provided with a rubber plate 25 formed of rubber is overlapped with the lid plate 21 so as to match with the lid plate 21. By closing the lock 24, the liquid crystal display panel 4 and the rubber packing 20 are brought into close contact with each other, and the gap between the liquid crystal display panel 4 and the rubber packing 20 is eliminated to perform waterproofing.

[0007]

In recent years, liquid crystal display devices have become larger and thinner, and their application fields are diversified. Therefore, TCP (Tape Carrier) mounted on a glass substrate and a liquid crystal display panel is used. Pa
Cage) has also become diverse in accordance with its use.

In the wet polishing using the waterproof jig described above,
If the external dimensions of the TCP, the glass substrate, or the liquid crystal display panel are changed, the dimensions of the waterproof jig must also be changed, so that there is a problem that a processing cost is required each time. In addition, since the waterproof jig is difficult to be diverted between models of the liquid crystal display device, there is a problem in that when the production of one model is completed, the use of the waterproof jig is lost.

The present invention has been made in view of the above-mentioned conventional problems, and does not require a new waterproof jig even if the dimensions of the liquid crystal display panel are changed. It is another object of the present invention to provide a method of polishing a liquid crystal display panel that can prevent water from entering a component mounted on the liquid crystal display panel.

[0010]

In order to achieve the above-mentioned object, a method for polishing a liquid crystal display panel according to the first aspect of the present invention uses a polishing agent and water to scratch a liquid crystal display panel. In the method of polishing a liquid crystal display panel to be polished and removed,
A frame is arranged on the liquid crystal display panel so as to surround the scratch and the surrounding area, and the frame is fixed to the liquid crystal display panel by vacuum suction, thereby waterproofing and polishing and removing the scratch. And

According to a second aspect of the present invention, in the method for polishing a liquid crystal display panel according to the first aspect, a trap is provided in the middle of a pipe for performing the vacuum suction.

According to the method of polishing a liquid crystal display panel of the present invention, a frame is arranged on the liquid crystal display panel so as to surround the scratch and the peripheral area thereof, and the frame is fixed to the liquid crystal display panel by vacuum suction to provide waterproofing. By polishing and removing the scratches, the frame, that is, the waterproof jig can be easily arranged visually without positioning with a pin or the like. Furthermore, even if the model of the LCD panel is changed,
It is possible to deal with this without making a new waterproof jig. Also, since the waterproof jig is fixed to the liquid crystal display panel by vacuum suction, even if water leaks from the waterproof jig, the water leaking from the suction hole for vacuum suction of the waterproof jig is used. And the components mounted on the liquid crystal display panel do not get wet.

Further, by providing a trap in the middle of the pipe for performing vacuum suction, it is possible to prevent water sucked from the suction hole from entering the vacuum equipment.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

The waterproof jig will be described with reference to FIGS. 1 is a perspective view showing a waterproof jig, FIG. 2 is a perspective view showing a lower surface of a vacuum frame, FIG. 3 is an explanatory view schematically showing a mechanism for performing vacuum suction, and FIG. 4 is a perspective view showing a suction trap. is there. FIG. 1 also shows a liquid crystal display panel.

As shown in FIG. 1, the vacuum frame 1 has a joint 2 for piping the vacuum frame 1 and a vacuum ejector,
A vinyl sheet 3 for preventing scattering of abrasive and water, and a support plate 5 for preventing the vinyl sheet 3 from dropping and coming into contact with the liquid crystal display panel 4 are attached. The vinyl sheet 3 has a larger area than the support plate 5 and is attached so as to cover the upper side of the support plate 5, so that the end thereof hangs down.

As shown in FIG. 2 showing the lower surface of the vacuum frame 1, a groove 6 for suction is formed in the vacuum frame 1, and a contact surface with the liquid crystal display panel is provided on the liquid crystal display panel.
A rubber 7 is attached to prevent the liquid crystal display panel from being damaged when the liquid crystal display panel is set, and to improve the adhesion between the vacuum frame 1 and the liquid crystal display panel during vacuum suction. The material of the rubber 7 is preferably urethane, and its hardness is preferably about 70 to 80 °.

Next, a mechanism for performing vacuum suction will be described with reference to FIG. As shown in FIG. 3, the air sent from the air supply source 8 performs vacuum suction using a vacuum ejector 10 via a regulator 9. An adsorption trap 11 is connected in the middle of the pipe between the vacuum ejector 10 and the vacuum frame 1.

The adsorption trap 11, as shown in FIG.
Container 1 made of glass bottle etc. that does not deform due to pressure change
It is preferable to use 2. In addition, it is preferable to increase the capacity of the adsorption trap 11 as much as possible. If the capacity is increased, the abrasive aqueous solution 13 accumulated in the container 12 does not need to be frequently discarded, so that the work labor can be reduced.

The wet polishing will be described below with reference to FIGS. FIG. 5 is a cross-sectional view illustrating wet polishing.
FIG. 6 is a cross-sectional view illustrating a case where vacuum suction is incomplete.

As shown in FIG. 5, the liquid crystal display panel 4 whose glass substrate has been damaged during the manufacturing process of the liquid crystal display device is placed on a panel set stage 16 attached to a polishing device, with the centers of both being visually observed. After setting, the liquid crystal display panel 4 is fixed by suction.

Next, the above-mentioned waterproof jig is positioned on the suction-fixed liquid crystal display panel 4 after visually aligning both centers thereof, and the waterproof jig is fixed to the liquid crystal display panel 4 by suction. . By adsorbing and fixing the waterproof jig to the liquid crystal display panel 4, the rubber 7 attached to the contact surface of the vacuum frame 1 with the liquid crystal display panel 4 adheres closely to the surface shape of the liquid crystal display panel 4, and The gap between the contact surface between the rubber 4 and the rubber 7 is eliminated, and waterproofing becomes possible.

An abrasive aqueous solution 13 containing an abrasive and water is put in a region surrounded by the vacuum frame 1 and a felt wheel 14 made of wool or the like and a felt wheel 1
The scratches on the liquid crystal display panel 4 are polished and removed by using a polishing means including a rotation driving means 15 for rotating the liquid crystal display panel 4. At this time, even if the abrasive aqueous solution 13 scatters,
The liquid crystal display panel 4 and the panel set stage 16 are not stained because they are protected by the support plate 5.

As shown in FIG. 6, even if the adhesion between the rubber 7 and the liquid crystal display panel 4 is incomplete, since the vacuum frame 1 is vacuum-adsorbed to the liquid crystal display panel 4, the abrasive Since the aqueous solution 13 is sucked up by the suction holes 17 of the vacuum frame 1, it does not leak outside the vacuum frame 1, that is, to the TCP side. The abrasive aqueous solution 13 sucked up by the vacuum frame 1 is stored in the adsorption trap if an adsorption trap is provided as described above.
As described above, since the aqueous abrasive solution 13 sucked up by the vacuum frame 1 is stored in the adsorption trap, it is possible to prevent the aqueous abrasive solution 13 from flowing into the vacuum ejector and to prevent the vacuum ejector from malfunctioning. Can be waterproof.

[0025]

As described above, according to the method for polishing a liquid crystal display panel of the present invention, a picture frame is arranged on a liquid crystal display panel so as to surround a flaw and a peripheral area thereof, and the picture frame is evacuated by vacuum suction. By fixing to the display panel, it is waterproof, and by polishing and removing the scratches, the frame, that is, the waterproof jig, can be easily arranged visually, and even if the model of the liquid crystal display panel is changed, it is waterproof. Work efficiency can be improved because it can be handled without creating a new jig.
Cost reduction becomes possible. Further, since the waterproof jig is fixed to the liquid crystal display panel by vacuum suction, even if water leaks from the waterproof jig, the components mounted on the liquid crystal display panel do not get wet.

Further, by providing a trap in the middle of the pipe for performing vacuum suction, it is possible to prevent water sucked from the suction hole from entering the vacuum equipment.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a waterproof jig.

FIG. 2 is a perspective view showing a lower surface of a vacuum frame.

FIG. 3 is an explanatory view schematically showing a mechanism for performing vacuum suction.

FIG. 4 is a perspective view showing an adsorption trap.

FIG. 5 is a cross-sectional view illustrating wet polishing.

FIG. 6 is a cross-sectional view illustrating a case where vacuum suction is incomplete.

FIGS. 7A and 7B are explanatory views showing a method of peeling a polarizing plate.

FIG. 8 is a perspective view showing scratches on the liquid crystal display panel.

FIG. 9 is a perspective view illustrating a jig used for conventional wet polishing.

FIG. 10 is a perspective view illustrating a lid plate shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum picture frame 2 Joint 3 Vinyl sheet 4 Liquid crystal display panel 5 Support plate 6 Groove 7 Rubber 8 Air supply source 9 Regulator 10 Vacuum ejector 11 Suction trap 12 Container 13 Aqueous abrasive solution 14 Felt wheel 15 Rotation driving means 16 Panel set stage 17 Suction Hole 18 Foreign matter 19 Scratches 20 Rubber packing 21 Cover plate 22 Pin 23 Bottom plate 24 Sling lock 25 Rubber plate 26 Polarizing plate 27 Concave portion

Claims (2)

[Claims] 1. A method for polishing a liquid crystal display panel, wherein a scratch on the liquid crystal display panel is polished and removed using an abrasive and water, wherein a frame is formed on the liquid crystal display panel so as to surround the scratch and its peripheral area. Wherein the frame is fixed to the liquid crystal display panel by vacuum suction to make the frame waterproof, and the scratches are polished and removed. 2. The method for polishing a liquid crystal display panel according to claim 1, wherein a trap is provided in the middle of a pipe for performing the vacuum suction.