JPH06160873A - Sealing method and sealing device for liquid crystal panel - Google Patents

Abstract

PURPOSE:To seal the liquid crystal injection holes of LCD panels in which liquid crystals are already injected by a UV curing resin. CONSTITUTION:An automatic applying section 4 detects plural sheets of the LCD panels into which the liquid crystals are already injected and which are housed into jigs 2, by each sheet. This section, then, applies the UV curing resin to the liquid crystal injection holes of the LCD panels at a prescribed application quantity and application length. The device is equipped with the two automatic applying sections 4 which can be respectively independently driven. A transporting plate 3 carrying plural pieces of the jigs 2 is sent to the position perpendicularly below a UV irradiation lamp 22 when the application of the UV curing resin ends. The applied UV curing resin is cured by adjusting the integrated light quantity of the UV rays with which the resin is irradiated by the opening and closing time of a shutter 23. The sealing of the liquid crystal injection holes of the LCD panels is thus executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal (LCD) panel sealing method and a sealing device.

[0002]

2. Description of the Related Art Conventionally, in a device in which an ultraviolet curable resin is applied to a liquid crystal injection hole of an LCD panel in which liquid crystal has been injected, and the applied portion is irradiated with ultraviolet rays to be cured and sealed, an operator inserts the ultraviolet curable resin. Has a cylindrical container (barrel)
The ultraviolet curing resin was applied by moving it along the elongated liquid crystal injection hole of the LCD panel while discharging the ultraviolet curing resin from a needle-shaped application port (needle) attached to the tip of the barrel. Also, the irradiation of ultraviolet rays is a spot.
The irradiation is performed by manually moving the ultraviolet irradiation lamp in the X direction and the Y direction (on a horizontal plane), aligning it with the portion of the LCD panel coated with the ultraviolet curable resin, and irradiating the ultraviolet ray for a certain period of time.

[0003]

In the above-described conventional sealing device, the operator applies the ultraviolet curable resin to the liquid crystal injection hole of the panel by moving the needle tip along the liquid crystal injection hole. The coating amount and coating length are non-uniform, and there is a drawback that high reliability cannot be expected in coating. Further, this work requires a lot of skill, and the burden on the worker is large and much time is required.

[0004] The irradiation of ultraviolet rays has been performed by a worker adjusting the ultraviolet irradiation lamp in the X and Y directions on a horizontal plane in accordance with the portion of the LCD panel to which the ultraviolet curable resin is applied.
Further, since the irradiation of ultraviolet rays is spot irradiation, the irradiation range is limited to a narrow circular area, and one LCD panel can be processed by one irradiation, and irradiation position alignment and irradiation must be repeated for the number of LCD panels. I had to spend a lot of time and effort here as well.

[0005]

SUMMARY OF THE INVENTION The present invention provides a method for sealing a liquid crystal injection hole of an LCD panel in which liquid crystal is already injected,
A step of applying the ultraviolet curable resin to the liquid crystal injection hole of the LCD panel with a plurality of application ports at a predetermined application amount and application length;
And irradiating the portion of the LCD panel coated with the ultraviolet curable resin with ultraviolet rays.

Further, the liquid crystal panel sealing device of the present invention comprises:
Two automatically applying parts that are independently driven, each having a sensor for detecting the LCD panel and a mechanism for applying the ultraviolet curable resin to the detected LCD panel, and respective moving mechanisms for moving the automatic applying part to the left and right. It is characterized by comprising a moving mechanism for moving the application unit base on which two automatic applying units and respective moving mechanisms are moved back and forth, and a sensor for detecting a jig accommodating a plurality of LCD panels. .

Further, the liquid crystal panel sealing device of the present invention comprises:
A mechanism for moving the carrier plate on which a plurality of jigs are placed back and forth to a position where the UV-curable resin-coated portion (liquid crystal injection hole) of the LCD panel is within the irradiation range, and a plurality of LCD panels housed in one jig A lamp with an effective irradiation range that can cure and seal the UV-cured resin coating part at once.
The shutter is provided with a shutter that prevents ultraviolet rays from being irradiated outside the range of curing and sealing and that allows ultraviolet rays to be irradiated for a certain period of time, and a mechanism that opens and closes the shutter.

[0008]

The present invention will be described below with reference to the drawings. FIG. 1 is a side view of a sealing device according to an embodiment of the present invention. FIG. 2 is a front view of the sealing device according to the embodiment of the present invention. 3 (a), (b), and (c) respectively show a carrier plate on which a plurality of jigs 2 accommodating a plurality of LCD panels 1 mounted on the sealing device according to one embodiment of the present invention are mounted. 3 is a front view and a side view of FIG. 3, and a detailed view of a liquid crystal injection hole. 4 is a detailed view of the coating mechanism, and FIG. 5 is a detailed view of the automatic coating section 4 included in the coating mechanism shown in FIG.

A plurality of LCD panels 1 are housed in a jig 2 as shown in FIG. 3 with the liquid crystal injection hole facing upward, and the plurality of jigs 2 are placed on a carrier plate 3. The carrier plate 3 on which the jig 2 is placed is placed at a predetermined position (see FIG. 1) of this device, and a series of operations of this device starts.

The coating section base 5 on which the two automatic coating sections 4 and the drive mechanism thereof are mounted is guided by the linear guide bearing 8 by the rotational force of the motor 6 transmitted by the ball screw 7 to move forward (direction of FIG. 1A). Move to). When the jig detection sensor 12 detects the jig 2, the coating section base 5 is stopped, and the two automatic coating sections 4 include the motor 9, the ball screw 10, and the linear guide bearing 11.
It moves to each origin position by each linear motion mechanism constituted by. The automatic coating unit 4 is shown in FIG.
Move to the right, LCD panel detection sensor 17
When the panel 1 is detected, the automatic coating unit 4 is stopped and the detected LCD panel 1 is coated with the ultraviolet curable resin.

To apply the ultraviolet curable resin, the barrel 13 provided in the automatic application unit 4 is lowered to a predetermined height by the cylinder 15 and the cylinder 16 is ejected while the ultraviolet curable resin is discharged.
To advance to a predetermined position (coating length). When it reaches the specified position, the discharge of the UV curable resin is stopped and the barrel 1
The cylinder 3 is raised by the cylinder 15 and retracted by the cylinder 16 to return to the state when the LCD panel 1 is detected.

The above-described series of operations from the right movement of the automatic coating unit 4 reach the right limit position of each of the two automatic coating units 4 (all of which are stored in the jig 2 detected by the jig detection sensor 12). After the application of the ultraviolet curable resin to the LCD panel 1 is completed), the automatic application unit 4 returns to the origin position and the application unit base 5 advances again. When the application of the ultraviolet curable resin to all the LCD panels 1 placed on the carrier plate 3 is completed, the two automatic application units 4 and the application unit bases 5 are at their respective standby positions (the carrier plate 3 is mounted on this device. State) and finish the coating operation.

When the application of the ultraviolet curable resin is completed, the carrier plate 3 on which the plurality of jigs 2 are placed is guided by the linear guide bearing 20 by the rotational force of the motor 18 transmitted by the ball screw 19 and retracts (FIG. 1B). Move in the direction). When the jig detection sensor 21 detects the jig 2, the carrier plate 3 is stopped and ultraviolet rays are emitted. At this time, the position where the carrier plate 3 stops is LC
The jig detection sensor 2 is preliminarily arranged so that the ultraviolet curable resin coating portion (liquid crystal injection hole) of the D panel 1 is vertically below the ultraviolet irradiation lamp 22 and at the ultraviolet irradiation position when the shutter 23 is opened.
Adjust 1. The ultraviolet irradiation lamp 22 is turned on before the carrier plate 3 moves, the jig 2 is detected, and the carrier plate 3 is detected.
When is stopped, the shutter 23 opens for a set time and irradiates ultraviolet rays. The shutter 23 is opened and closed by the cylinder 24, and by changing the setting of the time during which the shutter 23 is opened, the integrated light amount of the ultraviolet rays applied to the portion coated with the ultraviolet curable resin can be easily adjusted. When the irradiation of the ultraviolet rays to all the jigs 2 (LCD panel 1) is completed, the carrier plate 3 returns to the position placed on the device and the series of sealing operations of the device is completed.

[0014]

As described above, the present invention is provided with the automatic coating section for detecting the LCD panels one by one and coating the ultraviolet curing resin, so that the coating amount and coating length of the ultraviolet curing resin are uniform. It has become possible to automatically perform the coating work of. Further, by providing the two automatic coating units and driving them independently of each other, the time required for the coating work could be significantly shortened.

Further, as described above, since the ultraviolet irradiation lamp having a wide effective irradiation range is provided, it is possible to irradiate the ultraviolet curing resin coated portions of a plurality of LCD panels contained in one jig with one ultraviolet irradiation. Hardened and sealed.

[Brief description of drawings]

FIG. 1 is a side view of a sealing device according to an embodiment of the present invention.

FIG. 2 is a front view of the sealing device shown in FIG.

3 (a), (b), and (c) are front views of a carrier plate on which a plurality of jigs for accommodating a plurality of LCD panels mounted in the hole sealing device shown in FIG. 1 are mounted. FIG. 3 is a side view and a detailed view of a liquid crystal injection hole.

FIG. 4 is a detailed view of a coating mechanism.

FIG. 5 is a detailed view of an automatic coating section included in the coating mechanism shown in FIG.

[Explanation of symbols]

 1 LCD panel 2 Jig 3 Conveyor plate 4 Automatic coating unit 5 Coating base 6,9,18 Motor 7,10,19 Ball screw 8,11,20 Linear guide bearing 12,21 Jig detection sensor 13 Barrel 14 Needle 15 , 16, 24 Cylinder 17 LCD panel detection sensor 22 Ultraviolet irradiation lamp 23 Shutter

Claims (3)

[Claims] 1. A method for sealing a liquid crystal injection hole of a liquid crystal panel in which liquid crystal has been injected, wherein a step of applying a UV-curable resin to the liquid crystal injection hole of the liquid crystal panel with a predetermined application amount and application length by a plurality of application ports. And a step of irradiating the portion of the liquid crystal panel coated with the ultraviolet curable resin with ultraviolet rays, the method for sealing a liquid crystal panel. 2. Two automatic application units which are independently driven and each have a sensor for detecting a liquid crystal panel and a mechanism for applying an ultraviolet curable resin to the detected liquid crystal panel, and the automatic application unit is moved to the left and right respectively. Moving mechanism, a moving mechanism for moving a coating unit base on which two automatic coating units and respective moving mechanisms are placed back and forth, and a sensor for detecting a jig containing a plurality of liquid crystal panels. A liquid crystal panel sealing device characterized by: 3. A mechanism for moving a carrier plate on which a plurality of jigs are placed back and forth to a position where an ultraviolet-curable resin-coated portion (liquid crystal injection hole) of a liquid crystal panel is within an irradiation range, and a mechanism housed in one jig. A lamp with an effective irradiation range that can cure and seal the UV-cured resin-coated parts of multiple liquid crystal panels at once, and prevent UV rays from being irradiated outside the cure-sealed range for a certain period of time. 3. The liquid crystal panel sealing device according to claim 2, further comprising a shutter that enables irradiation and a mechanism that opens and closes the shutter.