Plastic film and image display device
A technology of image display and plastic film, applied in optical components, optics, instruments, etc., can solve the problems of large difference in refractive index, interference spots, high refractive index, and high reflection of the interface
Inactive Publication Date: 2008-12-10
FUJIFILM CORP
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Problems solved by technology
As a result, the following problems occurred: (1) high reflection at the interface; (2) interference spots due to interference between reflection on the interface and reflection on the surface; and (3) interference due to reflection on the back side of the PET , the appearance of interference spots
In order to solve this problem, it has been proposed to improve the flatness of the PET film, thereby reducing interference spots due to the PET film and the pressure-sensitive adhesive layer (for example, see JP-A-2001-071439), but this method has achieved only limited success with respect to the speckle
[0016] Furthermore, it is often seen today that the substrate film itself is prepared by providing the substrate with an underlayer whose refractive index differs considerably from that of the substrate, so that the substrate film itself also suffers from the above-mentioned interference. The problem of speckle, which also hinders the resolution of interference speckle and high index of refraction problems
Method used
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[0103] The present invention is described in more detail below.
[0104] The present invention will now be described more specifically in detail.
[0105] The plastic film according to the invention avoids the occurrence of interference spots, which are often observed under light sources (for example fluorescent lamps) containing bright-line spectral components at specific wavelengths, especially in the visible range. More specifically, the plastic film according to the present invention includes a hard coat film having a hard coat layer, a plastic film having a pressure-sensitive adhesive layer, a plastic film having an underlayer which is the above-mentioned plastic film intermediate products, and a functional plastic film with functional layers. Furthermore, the scope of the plastic film according to the present invention also includes an antireflection film which prevents interference spots and has an antireflection layer.
[0106] The interference spots discussed in the...
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A plastic film comprising a transparent plastic substrate, a primer layer and a functional layer in this order wherein a refractive index ns of the substrate and a refractive index nH of the functional layer satisfy the following formula (1): 0.03 <=|Ns-nH|| and an average reflectance of light of from 540 to 550 nm in wavelength incidenting perpendicular onto a face of the film at an interface among the functional layer and the substrate is 0.02% or less.
Description
[0001] This application is a divisional application of the Chinese patent application entitled "Plastic Film and Image Display Unit" filed on December 24, 2004, with application number "03814777.7". technical field [0002] The present invention relates to a plastic film free of interference spots and having improved visibility. More specifically, it relates to a hard coat film hardly showing any interference spots even under a three-wavelength fluorescent lamp, a plastic film having a pressure-sensitive adhesive layer, a plastic film having an underlayer which is An intermediate product of the above-mentioned plastic film, and a functional plastic film on which a functional layer is laminated. [0003] The invention further relates to an image display unit having a plastic film according to the invention. Background technique [0004] In recent years, there has been an increasing demand for transparent plastic substrates that are used as substrates for hard coat films and ...
Claims
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Login to View More IPC IPC(8): G02B1/11B32B7/02G02B1/14
Inventor 福田谦一松藤明博
Owner FUJIFILM CORP