Invention Grant
- Patent Title: Light emitting display providing with compensated cholesteric reflective polarizer for improved contrast even in high ambient light or large viewing angle
- Patent Title (中): 发光显示器提供补偿胆甾型反射偏振器,即使在高环境光或大视角下也能改善对比度
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Application No.: US10914855Application Date: 2004-08-10
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Publication No.: US07732809B2Publication Date: 2010-06-08
- Inventor: Masaya Adachi , Osamu Itou
- Applicant: Masaya Adachi , Osamu Itou
- Applicant Address: JP Chiba
- Assignee: Hitachi Displays, Ltd.
- Current Assignee: Hitachi Displays, Ltd.
- Current Assignee Address: JP Chiba
- Agency: Hogan & Hartson LLP
- Priority: JP2003-293127 20030813
- Main IPC: G02F1/1335
- IPC: G02F1/1335 ; H01L33/00

Abstract:
The present invention provides light emitting displays which produce a bright image by efficiently emitting light radiated from a light-emitting thin-film layer to the viewer side, and also produces a high-quality image of high contrast ratio and changing in color to a limited extent over a wide viewing angle range even in a bright atmosphere. The light emitting displays are provided with a plurality of light-emitting devices 70, each device 70 having a light-emitting thin-film layer 100 and a light reflective surface 300 in this order on the back side, and a circularly polarized light reflective layer 500 which separates incident light into two types of circularly polarized components, one being reflected and the other transmitted by the reflective layer, an optical compensation layer 800, a quarter-wave plate 700 and a polarizer 600 on the front side, wherein the optical compensation layer 800 is composed of a transparent body working as an optical indicatrix having little refractive index distribution in the in-plane direction and having a refractive index in the thickness direction different from that in the in-plane direction.
Public/Granted literature
- US20050035353A1 Light emitting display Public/Granted day:2005-02-17
Information query
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