Method for manufacturing polarizing plates

A manufacturing method and technology of polarizing plates, which are applied in optics, polarizing elements, nonlinear optics, etc., can solve problems affecting the degree of polarization of polarizing plates, large molecular structure, and poor iodine dichroism, and reduce light leakage in dark states , increase the effect of contrast

Inactive Publication Date: 2009-09-30
CHUNGHWA PICTURE TUBES LTD
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Problems solved by technology

However, due to the large molecular structure of the dyeing auxiliaries used in the dyeing process, when it enters the polyvinyl alcohol film, it will interfere with the molecular bonding between iodide ions and polyvinyl alcohol in the subsequent iodine solution dyeing process, and The dichroic effect of iodine is not good, which in turn affects the degree of polarization of the polarizing plate made

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  • Method for manufacturing polarizing plates
  • Method for manufacturing polarizing plates
  • Method for manufacturing polarizing plates

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Embodiment Construction

[0028] figure 2 It is a schematic diagram of a manufacturing process of a polarizing plate according to a first embodiment of the present invention. The manufacturing method of the polarizing plate of the present invention mainly combines the dyeing process and the iodine solution dyeing process, so that the manufactured polarizing plate has the advantages of good weather resistance of the dye-based polarizing plate and high polarization degree of the iodine-based polarizing plate. Please refer to figure 2 As shown, firstly, a polyvinyl alcohol (PVA) film 110 is provided, and the polyvinyl alcohol film 110 is transported between different workstations by using a plurality of rollers. Afterwards, the polyvinyl alcohol film 110 will be transported into a first dyeing tank 200 to perform a dyeing process on the polyvinyl alcohol film 110 . Furthermore, when the polyvinyl alcohol film 110 is dyed with dye, the present invention utilizes an ultraviolet light 500 to irradiate th...

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Abstract

The invention discloses a method for manufacturing polarizing plates. The method comprises the following steps: providing a polyvinyl alcohol (PVA) thin film; dyeing the PVA thin film with dye and using ultraviolet irradiation to assist in dyeing; dyeing the PVA thin film with iodine solution; and forming a protective layer on the upper surface and the lower surface of the PVA thin film respectively, thus the process of manufacturing the polarizing plates is completed.

Description

technical field [0001] The present invention relates to a manufacturing method of a polarizing plate, and in particular to a manufacturing method of a polarizing plate combined with a dyeing process and an iodine dyeing process. Background technique [0002] With the development of liquid crystal displays in many applications, such as: liquid crystal displays (LCD), mobile phones, portable computers or LCD TVs, etc., the demand for polarizers is also increasing. However, the polarizer still needs to be further improved to obtain better polarizing properties. In addition, in order to meet the conditions of different environments where different products are located, such as GPS systems, polarizers also need to have better weather resistance, such as moisture resistance and heat resistance, to meet the needs of different use environments. [0003] At present, polarizers can be mainly divided into dye-based polarizers and iodine-based polarizers. Dye-based polarizers are char...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02F1/1335
Inventor 连詹田邹健龙莫启能
Owner CHUNGHWA PICTURE TUBES LTD
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