Optical display device manufacturing system and manufacturing method, and material roll set and method for manufacturing same

Abstract

Provided are optical display device manufacturing system and manufacturing method capable of bonding, by using two material rolls having the anisotropies of an absorption axis or other axis oriented in the same direction, optical films to one and the other surfaces of an optical display unit so that the optical anisotropies are orthogonal to each other, and also provided are a material roll set and a method for manufacturing the material roll set. Cut lines are provided in advance on a first optical film (F11) having a width corresponding to the short side of an optical display unit (W) to divide the first optical film (F11) into a length corresponding to the long side of the optical display unit (W). Cut lines are provided in advance on a second optical film (F21) having a width corresponding to the long side of the optical display unit (W) to divide the second optical film (F21) into a length corresponding to the short side of the optical display unit (W). A first bonding device (18) bonds a divided piece of the first optical film (F11) having a length corresponding to the long side of the optical display unit (W) to one surface of the optical display unit (W). A second bonding device (28) bonds a divided piece of the second optical film (F21) having a length corresponding to the short side of the optical display unit (W) to the other surface of the optical display unit (W).

Description

technical field [0001] The present invention relates to a manufacturing system and manufacturing of an optical display device for bonding an optical film having optical anisotropy, such as an optical film including a polarizing plate, to one surface and the other surface of a rectangular optical display unit Method, roll-like web assembly and method of manufacturing the same. Background technique [0002] Figure 8 A conventional method of manufacturing an optical display unit mounted on a liquid crystal display device is schematically shown. First, at an optical film manufacturer, a strip-shaped sheet product (#1) with an optical film is manufactured in the form of a roll. Since this specific manufacturing process is a well-known manufacturing process, description is abbreviate|omitted. Examples of rolls of the strip-shaped sheet product include polarizing plate rolls, retardation plate rolls, and laminated film rolls of polarizing plates and retardation plates used in li...

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Problems solved by technology

[0008] However, in the manufacturing system of the optical display device of Patent Document 1, there is no disclosure of an apparatus for laminating the optical film on the other side of the optical display module after the optical film is attached to one side of the optical display module separately. Structure

Therefore, when the optical film is bonded on the other side using the same manufacturing system, there is room for improvement in manufacturing efficiency by performing secondary operations when loading the bonded optical display module into the device.

[0009] In addition, the polarizing plate bonded to one surface and the other surface of the optical display unit, the direction of the absorption axis is different (perpendicularly intersecting) between the one surface and the other surface, and generally manufactured with the absorption axis in the width direction of the roll. Difficulties with roll stock, and typical optical display components are rectangular

Taking these factors into consideration, it cannot be said that the structure of the device is perfect only by adding the various mechanisms from the supply mechanism of the strip-shaped sheet product to the bonding processing mechanism to the manufacturing system of Patent Document 1.

[0010] In addition, not only in the case of laminating a polarizing plate on one surface and the other surface, for example, in the case of laminating a retardation plate on one surface and the other surface of an optical display module, there is also a case where it is necessary to make the slow axis The direction is perpendicular to one surface and the other surface, and also in this case, there are the same problems as the case of laminating polarizing plates

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