Delay compensating plate, delay compensator, liquid crystal displaying device and projection type image displaying device
A liquid crystal display device and delay compensation technology, applied in projection devices, instruments, optics, etc., can solve problems such as large-angle correlation, contrast reduction, brightness (unfavorable luminance, etc.), and achieve the effect of easy and precise adjustment and improvement of contrast
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example 1
[0128] The controllability of vertical retardation (Rth) of the shaped birefringent films produced as described below was evaluated.
[0129] As shown in FIG. 14, on a support 61 composed of a quartz substrate, SiO as a low refractive index film 2 film and Nb as a high refractive index film 2 o 5The films were alternately stacked into a total of 70 layers (sample 1), a total of 90 layers (sample 2), and a total of 100 layers (sample 3), thereby manufacturing a shaped birefringent layer (optical multilayer film) 62 .
[0130] SiO 2 Membrane and Nb 2 o 5 The thickness of the film was adjusted to 10 nm. "ULDis-900V" available from ULVAC Inc was used as a film forming apparatus. The retardation versus incident angle of these samples 1 to 3 was measured using "RETS-100" available from Otsuka Electronics Co., Ltd. . The results are shown in FIG. 15 . In the drawings, the abscissa represents the incident angle, and the ordinate represents the amount of Re (retardation).
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example 2
[0134] Retardation compensating plates having shaped birefringent films according to other embodiments of the present invention, and retardation compensating plates not provided with such shaped birefringent films were produced, and the individual effects of compensating retardation were determined.
[0135] stack as a shaped birefringent film to a total of 70 layers of SiO 2 Membrane and Nb 2 o 5 Repeated multilayer films of films were formed on each of two quartz substrates with a thickness of 0.3 mm. The thickness of both was determined to be 10 nm. "ULDis-900V" available from ULVAC Inc was used as a film forming apparatus. An AR coating suitable for the blue band is then given on the sample surface. It was found that the reflectance was 0.5% or less in the wavelength band from 430 nm to 500 nm.
[0136] Two quartz substrates were bonded on their surfaces with respect to the film-forming surface while having a norbornene-based polymer film (manufactured by JSR Corporat...
example 3
[0147] A retardation compensation plate having an in-plane retardation of R0c=12 nm was prepared, and a change in retardation amount to be compensated (R0c / R0p= 4.8).
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