JPH08282906A - Device for sticking polarizing plate on lcd panel with frame - Google Patents

Abstract

PURPOSE: To surely press a polarizing plate from a sticking starting position in an LCD panel having a step part even if the polarizing plate is stuck in a position spaced by a short distance from the step part. CONSTITUTION: An apparatus 51 for pressing a polarizing plate against a recess of an LCD panel 15 with a frame having a step part and applying the polarizing plate to the LCD panel 15 is provided with a semi-cylindrical rubber roller 31 to press the polarizing plate against the recess.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a device for attaching a polarizing plate to an LCD panel with a frame.

[0002]

2. Description of the Related Art Conventionally, a cylindrical rubber roller has been used to attach a polarizing plate to an LCD panel. This rubber roller is used alone or incorporated in a part of the apparatus. To attach a polarizing plate using a rubber roller, use L
Hold the CD panel on a moving stage etc. with the sticking surface facing up, place the polarizing plate on the sticking surface of this LCD panel, and apply a predetermined pressing force to the rubber roller on the polarizing plate from one end. By rolling to the other end, the polarizing plate was pressed uniformly against the LCD panel, and the polarizing plate was attached to the LCD panel in a close contact state so that air bubbles did not enter.

[0003]

However, in the pasting using the conventional cylindrical rubber roller, as shown in FIG. 9, the LCD panel 1 is provided with the frame having the step portion 3 and the pasting surface 1a is recessed. Moreover, when the distance x from the step 3 to the sticking start position is shorter than the height h of the step 3, the step 3 becomes an obstacle and the end of the polarizing plate 7 is blocked by the cylindrical roller 5. There was a problem in that it could not be pressed and could not be pasted, or insufficient pressure caused bubbles to enter between the polarizing plate 7 and the LCD panel 1. The present invention has been made in view of the above circumstances, and in an LCD panel having a step portion, even when the polarizing plate is attached at a short distance from the step portion, it is possible to reliably press the polarizing plate from the attaching start position. The purpose is to provide a plate sticking device and improve the function of sticking a polarizing plate.

[0004]

In order to achieve the above object, the structure of a polarizing plate sticking device for a framed LCD panel according to the present invention is such that a polarizing plate is pressed into a concave portion of a framed LCD panel having a step. A device for attaching a polarizing plate to an LCD panel with a frame to be attached, comprising a semi-cylindrical rubber roller for pressing the polarizing plate into the recess.

[0005]

The rubber roller is formed in a semi-cylindrical shape with the extra arc portion cut off, and the extra arc portion and the step portion of the LCD panel do not interfere with each other.
Even when it is attached to the concave portion of the CD panel, it is possible to press from the attachment start position of the polarizing plate.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a device for attaching a polarizing plate to an LCD panel with a frame according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a perspective view of a polarizing plate sticking device of the present invention,
2 is an enlarged view of the polarizing plate holding portion, FIG. 3 is a view taken in the direction of arrow A in FIG.
4 is an enlarged view of the rubber roller portion, FIG. 5 is an enlarged view showing the flat portion of the rubber roller, FIG. 6 is an explanatory view of the rubber roller without the flat portion, FIG. 7 is a plan view of the roller rotation start positioning mechanism, and FIG.
FIG. 6 is a side view of a roller rotation start positioning mechanism. An XYθ stage 13 is provided on the base 11, and the XYθ stage 13 can move the LCD panel 15 placed on the upper surface to a desired position. Further, a slider 16 is provided on the base 11 adjacent to the XYθ stage 13, and the slider 16 is movable in the approaching / separating direction with respect to the XYθ stage 13.

A polarizing plate holding portion 17 is provided on the slider 16, and the polarizing plate holding portion 17 is supported by a rotary shaft 19 which is orthogonal to the moving direction of the slider 16 and is horizontal so as to be reversible (see FIG. 2). . Adsorption holes 21 shown in FIG. 3 are formed in the holding surface 17a of the polarizing plate holding portion 17, and the adsorption holes 2
Reference numeral 1 holds the polarizing plate 23 by suction. A positioning guide 25 is attached to the holding surface 17a, and the positioning guide 25 positions the polarizing plate 23 at a predetermined position.

The polarizing plate holder 17 has an XYθ stage 13
A pair of support rods 27 projecting in the direction are fixedly provided, and the support rods 2
Reference numeral 7 rotatably supports a roller shaft 29 in the same direction as the rotating shaft 19. A semi-cylindrical rubber roller 31 is fixed to the roller shaft 29, and the rubber roller 31 has an arcuate portion 31a (see FIG. 4) whose outer peripheral length matches the length of the polarizing plate 23. The rubber roller 31 is configured by winding, for example, silicon rubber around a metal core. Further, the rubber roller 31 is pressed against the polarizing plate 23 such that the flat surface portion 31 b in the diameter direction faces the step portion 15 a of the LCD panel 15.

A flat portion 33 shown in FIG. 5 is provided on the rubber roller 31, and the flat portion 33 is formed in a tangential direction from the end of the arcuate portion 31a on the sticking start side. This flat portion 33
Is provided for the following reason. That is, the rubber roller 31
When there is no flat portion 33, for example, in the case of a completely semi-cylindrical shape shown in FIG. 6A, when a pressing force is applied at the beginning of sticking,
The force is concentrated on the corner c at the end of the arc portion, the elastic deformation amount of the rubber increases, and the polarizing plate 23 is distorted. A bubble line 35 perpendicular to the direction is generated. Therefore, in this embodiment, the flat portion 33 capable of surface contact is provided to disperse the concentration of the pressing force to disperse / reduce the strain generated in the polarizing plate 23 and solve the above-mentioned inconvenience.

As shown in FIGS. 7 and 8, one support rod 2 is provided.
One end of the roller shaft 29 is projected from 7, and a stopper 37 is fixed to the projected end of the roller shaft 29.
A torsion coil spring 39 is provided on the roller shaft 29, and the torsion coil spring 39 urges the rubber roller 31 in a direction opposite to the rotation direction during sticking. A screw hole 43 is formed in the pasting head portion 41 connected to the support rod 27 in a direction orthogonal to the roller shaft 29, and a stopper screw 45 is screwed into the screw hole 43. The tip of the stopper screw 45 contacts the stopper 37.

Therefore, the rubber roller 31 is held at the roller rotation start position where the stopper 37 and the stopper screw 45 come into contact with each other by the urging force of the torsion coil spring 39. Further, in the rubber roller 31, the contact position between the stopper screw 45 and the stopper 37 is changed by rotating the stopper screw 45, and the rotation start position can be adjusted. A roller rotation start positioning mechanism 47 is configured by mainly using the stopper 37, the torsion coil spring 39, and the stopper screw 45. In addition, 49 in FIG. 1 is a handle for pressing and moving the rubber roller 31. The polarizing plate sticking device 51 of the present embodiment is configured with the rubber roller 31, the flat portion 33, and the roller rotation start positioning mechanism 47 as the main components of the configuration.

The polarizing plate sticking device 5 having the above-mentioned structure
The operation of No. 1 will be described. First, the polarizing plate holding portion 17 is inverted as shown in FIG. 2, the end is aligned with the flat portion 33 of the rubber roller 31, and the polarizing plate 23 is suction-held on the holding surface 17a. At the same time, the LCD panel 15 is moved to the XYθ stage 13
Place on.

Then, the polarizing plate holding portion 1 is held by the handle 49.
2 is rotated in the direction of arrow a in FIG. 2, and one end of the polarizing plate 23, which coincides with the flat portion 33, is pressed to the attachment start position of the LCD panel 15. At this time, since the rubber roller 31 has a semi-cylindrical shape, the step portion 15a does not become an obstacle, and the flat surface portion 31b of the rubber roller 31 is arranged to face the step portion 15a as shown in FIG. The polarizing plate 23 has a flat portion 33 (see FIG. 5).
It becomes possible to press from the immediate vicinity of the stepped portion 15a by the reference.

Thereafter, the rubber roller 31 rolls on the polarizing plate 23 by moving the rubber roller 31 in the attaching direction (the direction of arrow b in FIG. 1) while pressing the rubber roller 31 against the polarizing plate 23 with the grip 49. Is pressed against the LCD panel 15 with a uniform pressing force from one end, and the sticking is completed at the sticking end position (see the chain double-dashed line in FIG. 4). At this time, since the rubber roller 31 is rotated against the torsion coil spring 39, when the pressing force is released at the pasting end position, the rubber roller 31 is reversely rotated by the restoring force of the torsion coil spring 39, and the stopper 37 is released. Is again held at the roller rotation start position where it comes into contact with the stopper screw 45.

Polarizing plate pasting device 51 according to the above embodiment
According to the method, since the rubber roller 31 has a semi-cylindrical shape, the extra arc portion and the step portion 15a do not interfere with each other, and the polarizing plate 2
Even when 3 is attached at a short distance from the step portion 15a, the polarizing plate 23 can be surely pressed from the attachment start position. Since the roller rotation start positioning mechanism 47 is provided, the rubber roller 31 is always held at the predetermined roller rotation start position by bringing the stopper 37 into contact with the stopper screw 45 by the urging force of the torsion coil spring 39. You can Furthermore, the rubber roller 3
Since the flat portion 33 is provided on the first plate, the concentration of the pressing force at the beginning of sticking can be dispersed, and the distortion generated in the polarizing plate 23 can be dispersed / reduced, and the occurrence of the bubble line 35 that is likely to occur at the sticking start portion can be prevented. can do.

According to the invention, an LC having a step 15a
Since it is possible to attach the polarizing plate 23 to the concave portion of the D panel 15, defective products caused by the polarizing plate due to only the polarizing plate 23 (good products can be made if they are reattached due to dust, contamination of foreign matter, or scratches). It is also possible to make a good product (relief) by re-attaching the polarizing plate.

In the above embodiment, the rubber roller 31 is used.
Was formed into a semi-cylindrical shape, but as a modification of the present invention,
The rubber roller is made of soft material with low hardness, and the step 1
A method in which the step difference of 5a is absorbed by the deformation amount of the soft rubber roller is also conceivable. With such a method, a cylindrical rubber roller can be used, and the roller rotation start positioning mechanism 47 can be omitted.

In the above embodiment, the rubber roller 31 is used.
However, as a means for pressing the polarizing plate 23, it is conceivable to use a flat plate-like spatula member made of a resin material or the like instead of the rubber roller 31.

Further, the polarizing plate sticking device 51 may be provided with a pressing control means for controlling the load applied to the rubber roller 31 to be constant and not applying a pressing force above a certain level.
As a configuration of the pressing control means, for example, a spring or a load sensor may be used to reduce the pressing by the rubber roller 31 so as not to exceed a certain level. With such a pressing control means, the rubber roller 31
By stabilizing the pressing force by, it is possible to reliably prevent the inclusion of bubbles.

[0020]

As described above in detail, according to the device for attaching a polarizing plate to an LCD panel with a frame according to the present invention,
Since the rubber roller has a semi-cylindrical shape, the extra arc portion and the step portion do not interfere with each other, and even when the polarizing plate is attached at a short distance from the step portion, the polarizing plate is pressed securely from the attachment start position. be able to. As a result, the polarizing plate and LCD
It is possible to prevent problems such as air bubbles entering between the panel and the panel.

[Brief description of drawings]

FIG. 1 is a perspective view of a polarizing plate sticking device of the present invention.

FIG. 2 is an enlarged view of a polarizing plate holder.

3 is a view on arrow A in FIG. 2. FIG.

FIG. 4 is an enlarged view of a rubber roller portion.

FIG. 5 is an enlarged view showing a flat portion of a rubber roller.

FIG. 6 is an explanatory diagram of a rubber roller having no flat portion.

FIG. 7 is a plan view of a roller rotation start positioning mechanism.

FIG. 8 is a side view of a roller rotation start positioning mechanism.

FIG. 9 is an explanatory view of a conventional polarizing plate sticking device.

[Explanation of symbols]

 15 LCD panel 15a Step 23 Polarizing plate 27 Supporting rod 29 Roller shaft 31 Rubber roller 33 Flat part 37 Stopper 39 Torsion coil spring 45 Stopper screw 51 Polarizing plate pasting device

Claims (3)

[Claims] 1. A device for sticking a polarizing plate to an LCD panel with a frame, which presses and sticks a polarizing plate to a recess of an LCD panel with a frame having a step, and is a semi-cylindrical shape for pressing the polarizing plate to the recess. An apparatus for attaching a polarizing plate to an LCD panel with a frame, which is equipped with the rubber roller. 2. A support rod, a roller shaft rotatably supported by the support rod and on which the rubber roller is fixed, a stopper fixed to one end of the roller shaft, and a rotation direction opposite to the rotation direction when the rubber roller is attached. 2. A torsion coil spring for urging the rubber roller in a direction, and a stopper screw for contacting the stopper from a direction orthogonal to the roller shaft to hold the rubber roller at a predetermined rotation start position. LC with the frame described
Device to attach polarizing plate to D panel. 3. The polarized light for an LCD panel with a frame according to claim 1, wherein the semi-cylindrical rubber roller is provided with a flat portion formed in a tangential direction of the arc at the end of the arc. Board pasting device.