Optical element, production method for optical element, and liquid crystal display device
An optical element, liquid crystal phase technology, applied in the directions of optical elements, optics, polarizing elements, etc., can solve the problem of color change and other problems, and achieve the effect of reducing the oblique tone change and excellent oblique brightness.
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Embodiment 1
[0298]
[0299] [Acrylic resin having a lactone ring structure represented by the following general formula (II) {comonomer mass ratio=methyl methacrylate / 2-(hydroxymethyl)methyl acrylate=8 / 2, The lactone cyclization rate is about 100%, the content of the lactone ring structure is 19.4%, the weight average molecular weight is 133000, the melt flow rate is 6.5g / 10 minutes (240°C, 10kgf), and the Tg is 131°C}90 Parts by mass, a mixture with 10 parts by mass of acrylonitrile-styrene (AS) resin {Toyo-AS AS20, manufactured by TOYO STYRENE CO., LTD.}, Tg is 127 ° C] pellets are supplied to the twin-screw extruder, It was melt-extruded at about 280° C. into a sheet form to obtain a long temporary support with a thickness of 40 μm.
[0300] [chemical formula 7]
[0301]
[0302] In the above general formula (II), R 1 is a hydrogen atom, R 2 and R 3 For methyl.
[0303]
[0304] On the aforementioned temporary support, an alignment layer coating solution (A) having the foll...
Embodiment 2～16
[0328] The addition amount of the chiral reagent was adjusted so that the reflection wavelength became the reflection wavelength described in Table 1, and the biaxial stretching conditions were described in Table 1, and the reflection polarization was formed in the same manner as in Example 1. device.
Embodiment 21～26
[0349] As shown in Table 2, reflective polarizers of Examples 1 to 16 were formed as a blue reflective layer (first light reflective layer), a green reflective layer (second light reflective layer), a red reflective layer (third light reflective layer), respectively. Optical elements of Examples 21 to 25 in which a reflection polarizer including a plurality of light reflection layers is laminated, and a λ / 4 plate and a polarizer are further laminated. Furthermore, the optical element of Example 26 provided with the reflective polarizer which laminated|stacked the infrared reflective layer (fourth light reflection layer) further with the structure of Example 23 was produced.
[0350] The lamination method of the first light reflection layer to the third light reflection layer is as follows.
[0351] The second light reflection layer and the third light reflection layer were produced on the above-mentioned temporary supports, respectively. A commercially available acrylic adhes...
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