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AssigneeNitto Denko Corporation
InventorsTomokazu Yura, Kazuo Kitada, Satoru Koshio, Takuya Nakazono
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Provided are a method of manufacturing an optical display unit and a manufacturing system of the optical display unit wherein in the case of sticking an optical film to an optical display substrate, a defective optical film is eliminated optimally and precision of the elimination can be confirmed. The method is characterized in that in the process of conveying sheet product, a predictive conveyance distance when conveying positional identification information provided to the sheet product from a first position upstream in the conveyance to a second position downstream of the first position in the conveyance is compared with a measured conveyance distance from the first position to the second position obtained by detecting the positional identification information by use of a detection means respectively at the first position and the second position, and the conveyance processing of the sheet product is corrected so that the measured conveyance distance is within the predetermined range of the predictive conveyance distance.
The method of manufacturing an optical display unit according to claim 1, wherein the predicted feed distance is calculated on the basis of a detection result of the detecting means at the first position, and a feeding controller for a feeding means that feeds the sheet product.
The method of manufacturing an optical display unit according to claim 1, wherein the actually measured feed distance is calculated on the basis of a feed distance measuring means that measures the feed distance of the sheet product, and a detection result of the detecting means at each of the first and second positions.
The method of manufacturing an optical display unit according to claim 1, wherein the detecting means at the second position is set up at the downstream side of a means for the cutting in the feeding direction, or at the upstream side thereof in the feeding direction.
The method of manufacturing an optical display unit according to claim 1, wherein the position specifying data is beforehand given onto the sheet product, and the sheet product is wound into a roll form.
The method of manufacturing an optical display unit according to claim 1, wherein the position specifying data is given onto the sheet product at the upstream side of the feeding from the first position.
The method of manufacturing an optical display unit according to claim 1, wherein when the actually measured feed distance is not within the predetermined range of the predicted feed distance, an alarm is issued about this fact.
The method of manufacturing an optical display unit according to claim 1, wherein the sheet product contains a defect existing in the pressure-sensitive adhesive layer and/or the optical film, and the sheet product is cut into the pressure-sensitive adhesive attached optical film piece from which the defect is excluded, the piece having the predetermined shape.
The method of manufacturing an optical display unit according to claim 1, wherein before the first position, the release film is peeled off from the sheet product to make a defect inspection of the optical film and the pressure-sensitive adhesive layer, and after the defect inspection the release film is next laminated onto the pressure-sensitive adhesive layer.
A manufacturing system of an optical display unit obtained by cutting a long sheet product wherein a release film is laminated onto an optical film through a pressure-sensitive adhesive layer into a predetermined shape without cutting the release film, peeling off a pressure-sensitive adhesive attached optical film piece obtained by the cutting, which includes the pressure-sensitive adhesive layer and the optical film each having the predetermined shape, from the release film, and bonding the pressure-sensitive adhesive layer side of the optical film piece onto an optical display substrate, comprising:
Dependencies are inferred from the claim text.