Patent ID: 9274259
Filing Date: 2016-03-01
CPC Classification: G02B,H01L

Claim Text:
1. A display device comprising: an organic light-emitting diode (OLED) display panel configured to display an image; a first tri-acetyl cellulose (TAC) layer; a second tri-acetyl cellulose (TAC) layer; a Poly-Vinyl Acetate (PVA) layer between the first TAC layer and the second TAC layer, the PVA layer configured to linearly polarize external light; and a Quarter Wave Plate (QWP) configured to circularly polarize light, the QWP placed closer to the display panel than the PVA layer, wherein the QWP has an in-plane retardation value in a range of 90 through 140 nm, and a ratio of reflective indices in x and y axes directions corresponding to 1.1, wherein the PVA layer has an iodine molecular weight in accordance with the in-plane retardation value of the QWP.