Manufacturing method of optical thin film sheet

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for an optical film chip which can improve the productivity and an automatic cutting device for an optical film intermediate body which is used for the method. SOLUTION: The method comprises a cutting process of cutting the optical film intermediate body out of a long-sized optical film, a chip cutting process of cutting an optical film chip out of the cut optical film intermediate body, an inspecting process of inspecting the cut optical film chip, and a packing process of packing the specified number of optical film chips having been inspected. In the cutting process, the optical film intermediate body is automatically cut interlocked with the chip cutting process and in the inspecting process, optical film chips received from the chip cutting process are sequentially inspected; and a quantity detecting means automatically detect the number of optical film chips having been inspected and when the number of the optical film chips having been inspected reaches a specified number, the specified number of the optical film chips are sent to the packing process.

Description

technical field [0001] The invention relates to a method for manufacturing an optical film used in a liquid crystal display device and an automatic cutting device for an optical film intermediate used in the method. Background technique [0002] Optical films represented by polarizing films, retardation films, etc. are important optical components constituting liquid crystal display devices. For example, in TN (Twisted Nematic) type liquid crystal display devices, etc., the polarizing film is added on the liquid crystal element in the form of a square optical film sheet, one on each of the upper and lower sides. [0003] The required optical film is cut out from the long optical film as the raw material, but if the optical film is cut directly from the long optical film, the size of the optical film is really small compared with the long optical film. Too small and the cutting out operation is difficult. Therefore, a method of first cutting out an intermediate-sized optica...

AI Technical Summary

Problems solved by technology

[0015] ①In each independently configured operation, the optical film intermediates 13 or optical film sheets 14, 14' are kept in a certain quantity, and then transported to the next process with a flatbed truck, etc., and each operation is prone to stagnation, requiring There is a production lead time of 4 to 5 days, which cannot meet the short-term delivery needs of customers

[0017] ③Because the inspection is carried out at the end of mass production, when there are unqualified products, the feedback of abnormal quality will be delayed, resulting in more material loss

[0018] ④Because each process is independently configured, more space and personnel are required to build the production line, so improvements are urgently needed in terms of space and manpower for the production line

[0019] ⑤When establishing the production plan, the estimated yield of each operation should be included, so compared with the required production volume, it will cause too much waste

Especially in the production of multiple varieties and small batches, the low yield rate is even more obvious

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