An organic EL display device including a substrate, a transparent electrode, a luminescent layer, and a metal electrode layer in this order from a light emission side, a circularly polarizing plate disposed on the light emission side of the substrate, the circularly polarizing plate including a polarizing film and phase difference films that stacked on each other. The phase difference film includes a resin composition (A) containing polystyrene-based polymer having a syndiotactic structure and polyarylene ether, a ratio of the polystyrene-based polymer having the syndiotactic structure with respect to the polyarylene ether in the resin composition (A) is 65:35 to 55:45, being a weight ratio of (the polystyrene-based polymer having the syndiotactic structure) with respect to (the polyarylene ether), the phase difference film satisfies a relation Re 450 <Re 550 <Re 650 , and an Nz coefficient of the phase difference film at a wavelength of 550 nm is âˆ’0.25 to âˆ’0.05.

Claims

18 · 1 independent · depth 4

18 granted claims

›1.independentA phase difference film, comprising:na layer formed of a resin composition (A) containing a polystyrene-based polymer having a syndiotactic structure …+17

›2.↳ 1The phase difference film according to claim 1, wherein Re450/Re550 in the phase difference film is 0.80 or more and 0.90 or less.d2

›3.↳ 1The phase difference film according to claim 1, wherein a birefringence Î”n (Î”n=nxâˆ’ny) of the phase difference film at a wavelength of 550 nm is 0.…d2

›4.↳ 1The phase difference film according to claim 1, having a thickness of 80 μm or less.d2

›5.↳ 1The phase difference film according to claim 1, wherein the polyarylene ether contains a polymer including a phenylene ether unit.d2

›6.↳ 1The phase difference film according to claim 1, wherein the in-plane direction retardation Re550 of the phase difference film at a measurement wavelen…d2

›7.↳ 1The phase difference film according to claim 1, wherein the phase difference film is prepared by subjecting a long-length pre-stretch film formed of t…d2+1

›9.↳ 1The phase difference film according to claim 1, wherein the phase difference film is prepared by subjecting a long-length pre-stretch film layered bod…d2+4

›14.↳ 1The phase difference film according to claim 1, wherein the phase difference film is prepared by: subjecting a long-length pre-stretch film layered bo…d2+3

›18.↳ 1The phase difference film according to claim 1, wherein:nan Nz coefficient of the phase difference film at a wavelength of 550 nm is âˆ’0.25 to âˆ’0.0…d2

Classifications

4 codes

IPC · International Patent Classification

Section G — Physics

G02B5/30

Section H — Electricity

H01L51/52
H01L27/32
H01L29/08

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0.8 y

291 days filing → grant

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non-final + final

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no RCE

Examiner

Elias M Ullah

art unit 2893 · TC 2800

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›Priority documents — 1

Type	Document	Date
related publication	US 20150219816 A1	6 Aug 2015

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