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Polarized sheet protective film and polarized sheet using said film and liquid crystal display device
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A technology of protective film and polarizer, applied in optics, instruments, nonlinear optics, etc., can solve problems such as LCD visual deterioration, and achieve the effect of improving visibility, characteristics and appearance.
Active Publication Date: 2009-06-10
KONICA MINOLTA OPTO
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[0005] When the liquid crystal display device is used continuously for a long time, or when it is used continuously at high temperature, or under high temperature and high humidity, the deterioration of LCD visibility is inevitable
Method used
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Embodiment 1～11
[0186] (Manufacturing polarizer protective film by solution casting method)
[0187] When the cellulose triacetate film of the present invention having a desired dry film thickness of 40 μm is produced by the solution casting method, the dope is firstly prepared. That is, the following compounded composition in which triacetyl cellulose was dissolved in a solvent was put into an airtight container, and the prepared dope was dissolved while stirring, and the prepared dope was filtered with filter paper.
[0188] (mastic composition)
[0189] 100 parts by weight of cellulose triacetate with an acetyl substitution degree of 2.88
[0236] (Manufacture of polarizer protective film by melt casting method)
[0237] The cellulose triacetate film of the polarizer protective film of the present invention having a target dry film thickness of 80 μm was produced by the melt casting film forming method.
[0238] 100 parts by weight of cellulose triacetate with an acetyl substitution degree of 2.88
[0245] Infrared absorber IR-2 (embodiment 12) 0.4 parts by weight
[0246] In Example 13, 0.3 parts by weight of IR-7 as an infrared absorber was used, and in Example 14, 0.2 parts by weight of IR-32 as an infrared absorber was used.
[0247] The mixture of the above-mentioned materials was mel...
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Abstract
To provide a polarizing plate and the liquid crystal display using the same. The polarizing plate protection film has <=10% transmissivity at 380 nm wavelength and >=91% transmissivity at 450 nm wavelength and satisfies at least one among conditions A, B, and C condition described below. Condition A: variation width of transmissivity after elapse of 200 hours under environment of 80[deg.]C temperature and 90%RH humidity is respectively >=80% and <=120% toward transmissivity at respective wavelengths. Condition B: variation width of transmissivity after elapse of 200 hours under dry environment of 105[deg.]C temperature is respectively >=90% and <=110%. Condition C: variation width of transmissivity after elapse of 200 hours under environment of -50[deg.]C temperature is respectively >=90% and <=110%.
Description
technical field [0001] The present invention relates to a polarizing plate protective film used as a protective film for a polarizing plate of a liquid crystaldisplay device (LCD), and a polarizing plate using the film. Background technique [0002] In recent years, liquid crystal display devices (LCDs) have been increasingly used in liquid crystal displays such as TVs, personal computers, and mobile phones because of space saving and energy saving. In particular, with the progress of larger screen size and higher image quality of TV, higher quality of liquid crystal display devices is required due to the expansion, generalization and diversification of use places, and further improvement of display function and visibility function is required. [0003] It has been found that the quality of liquid crystal displays is influenced by the characteristics of polarizers, one of the components of liquid crystal displays. The stabilization of the polarization characteristics of th...
Claims
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Application Information
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