JPH1054981A - Polarizing plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the generation of static electricity in a stage for sticking a polarizing plate to a liquid crystal display element and to lessen the damage of the liquid crystal panel. SOLUTION: This polarizing plate is formed by forming a protective film on one surface of a polarizing plate body and forming a separator 6a via a tacky adhesive on the other surface. The peripheral part of the tacky adhesive side surface of the separator 6a is formed as a non-treated region 2 to be adhered to the tacky adhesive and the central part thereof is formed as a release treated region 1 not to be adhered to the tacky adhesive. At the time of sticking the polarizing plate to the liquid crystal display element, the separator 6a is peeled and the polarizing plate body is pressed and adhered to the liquid crystal display element via the tacky adhesive. The release area of the separator 6a is made smaller with respect to the tacky adhesive by providing the tacky adhesive side surface of the separator 6a with the release treated region and, therefore, the electrification generated at the time of peeling the separator 6a decreases and the quantity of the static electricity moved and diffused to the liquid crystal display element when the polarizing plate body is adhered to the liquid crystal display element decreases. The damage on the liquid crystal panel by the static electricity is thus lessened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to information equipment and AV
The present invention relates to a polarizing plate attached to the surface of a liquid crystal display element used for equipment and the like.

[0002]

2. Description of the Related Art In recent years, applications of liquid crystal panels have been rapidly expanding, and accordingly, cost reduction and improvement in production efficiency have been demanded. In particular, the challenge in improving yield is
This is the generation of static electricity in the liquid crystal panel manufacturing process. The generation of static electricity may be caused by the human body, the device, the material, the configuration, and the like. In particular, a manufacturing process in which static electricity is frequently generated includes a step of attaching a polarizing plate to a liquid crystal display element.

The configuration of a conventional polarizing plate will be described below with reference to the drawings. FIG. 3 is a cross-sectional view showing a configuration of a conventional polarizing plate before sticking to a liquid crystal display element. In FIG. 3, 3 is a protective film, 4 is a polarizing plate body, 5 is an adhesive,
6 is a separator. In the polarizing plate shown in FIG. 3, a protective film 3 is attached to a surface of the polarizing plate main body 4 not to be attached to the liquid crystal display element in order to protect it from contamination, and this protective film 3 is easily peeled off at the time of use. It is possible. A separator 6 is adhered to the surface of the polarizing plate body 4 on the side to be attached to the liquid crystal display element via an adhesive 5. When attaching this polarizing plate to a liquid crystal display element,
The separator 6 is peeled off, and the polarizing plate body 4 is pressed and adhered to the liquid crystal display element via the adhesive 5. As shown in FIG. 4, the surface of the separator 6 on the side of the adhesive 5 is an untreated area 2 on which the entire surface is not subjected to any processing. And glued.

[0004]

However, in the above-mentioned conventional configuration, in the step of attaching the polarizing plate to the liquid crystal display element, when the separator 6 is peeled off from the pressure-sensitive adhesive 5, peeling charging occurs, and the pressure-sensitive adhesive 5 and the separator 5 are separated. Different kinds of charges are generated on the 6th side. Then, the polarizing plate main body 4 is placed via the adhesive 5.
Was pressed and adhered to the liquid crystal display element, the charge moved and diffused into the liquid crystal display element, and the resulting liquid crystal panel was damaged. The amount of generated static electricity is smaller as the peeling area is smaller if other conditions are equal. However, as shown in FIG. The area was large, and a large amount of static electricity was generated when the liquid crystal panel was peeled off from the adhesive 5, and the liquid crystal panel was greatly damaged. Such a mode in which the liquid crystal panel is relatively damaged is the STN mode. In the STN liquid crystal panel, discharge occurs between the opposed electrodes or between the adjacent electrodes, which appears as a phenomenon such as a line defect or white turbidity on the display surface. In the panel, it additionally appears as a line defect due to the breakdown of the transistor.

An object of the present invention is to provide a polarizing plate capable of suppressing generation of static electricity in a step of sticking to a liquid crystal display element and reducing damage to a liquid crystal panel.

[0006]

The polarizing plate of the present invention is a polarizing plate provided with a separator which can be peeled off on one side of a polarizing plate body via an adhesive, and the separator is separated from the surface on the side of the adhesive. A characteristic region is provided. According to this configuration, when the polarizing plate is attached to the liquid crystal display element, the separator is peeled off, and the polarizing plate body is pressed and adhered to the liquid crystal display element via the adhesive, but is attached to the surface of the separator on the adhesive side. By providing the region having releasability, the separation area of the separator with respect to the adhesive is reduced, so that the charge generated when the separator is separated is reduced, and the liquid crystal is formed when the polarizing plate body is bonded to the liquid crystal display element. The amount of static electricity that moves and diffuses to the display element is also reduced. Therefore, damage to the liquid crystal panel due to static electricity can be reduced.

[0007]

FIG. 1 is a plan view of a separator in a polarizing plate according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a release processing area of the separator 6a, and reference numeral 2 denotes a non-processing area of the separator 6a. The polarizing plate of the first embodiment is the same as FIG. 3 except that the separator 6 a shown in FIG. 1 is used instead of the separator 6 in FIG. The separator 6a is formed on the other surface with the adhesive 5 interposed therebetween.
The peripheral portion of the separator 6a is the non-processed region 2 where the adhesive 6 is adhered to the adhesive, and the central portion is the release treated region 1. The release processing region 1 at the center is, for example, a region where a release agent is applied.

FIG. 2 is a plan view of a separator in a polarizing plate according to a second embodiment of the present invention. In FIG. 2, reference numeral 1 denotes a release processing area of the separator 6b, and reference numeral 2 denotes a non-processing area of the separator 6b. The polarizing plate of the second embodiment is different from the polarizing plate of FIG.
3 is the same as FIG. 3 except that the separator 6b shown in FIG. The separator 6a according to the first embodiment has a non-processed area 2 at the periphery and a release processing area 1 at the center, but the separator 6b according to the second embodiment does not.
Is provided with a non-process area 2 in the form of a dot and the other area as a release processing area 1. In addition, by arranging the dot-shaped unprocessed areas 2 uniformly in the peeling direction, when the separator 6b is peeled, the separator 6b can be peeled with a stable force.

According to the first and second embodiments, when the polarizing plate is attached to the liquid crystal display device, the separators 6a and 6b are peeled off and the polarizing plate main body 4 is attached via the adhesive 5 to the liquid crystal display device. Is pressed and adhered, but the separator 6a,
By providing the release treatment region 1 on the surface of the adhesive 6b on the side of the adhesive 5, the separation area of the separators 6a and 6b from the adhesive 5 is reduced, so that the charge generated when the separators 6a and 6b are peeled is reduced. In addition, the amount of static electricity that moves and diffuses into the liquid crystal display element when the polarizing plate body 4 is bonded to the liquid crystal display element is reduced. Therefore, damage to the liquid crystal panel due to static electricity can be reduced. The arrangement of the release processing region 1 and the non-processing region 2 is not limited to those shown in FIGS.

[0010]

The polarizing plate of the present invention is characterized in that a region having releasability is provided on the surface of the separator on the side of the adhesive, and when the polarizing plate is attached to a liquid crystal display element, the separator is peeled off. The polarizing plate body is pressed to and adhered to the liquid crystal display element via the adhesive, but the separation area of the separator from the adhesive is reduced by providing a region having releasability on the surface of the separator on the adhesive side. Therefore, the charge generated when the separator is peeled off is reduced, and the amount of static electricity that moves and diffuses into the liquid crystal display element when the polarizing plate body is adhered to the liquid crystal display element is also reduced. Therefore, damage to the liquid crystal panel due to static electricity can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of a separator in a polarizing plate according to a first embodiment of the present invention.

FIG. 2 is a plan view of a separator in a polarizing plate according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view illustrating a configuration of a conventional polarizing plate.

FIG. 4 is a plan view of a separator in a conventional polarizing plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Release processing area 2 Non-processing area 3 Protective film 4 Polarizer main body 5 Adhesive 6a, 6b Separator

Claims (1)

[Claims] 1. A polarizing plate provided with a separator which can be peeled off via an adhesive on one surface of a polarizing plate main body, wherein the separator has an area having a release property on a surface on the adhesive side. Characteristic polarizing plate.