Backlight containing formed birefringence reflective polarizer

Details Backlight containing formed birefringence reflective polarizer Backlight containing formed birefringence reflective polarizer

2007-06-11

2009-11-17

O'Shea, Sandra L (Department: 2875)

Illumination

Edge lighted panel

Light modifier with emission face combined with light guide...

C362S318000, C362S615000, C349S061000, C349S062000, C349S063000, C349S096000

Reexamination Certificate

active

07618178

ABSTRACT:
A backlight unit comprises:(1) a light source;(2) a light guide plate (LGP) having an incident face toward the light source and having a refractive index nLGP;(3) a reflective polarizer having formed birefringence in optical contact with the LGP including a layer having parameters of the reflective polarizer selected to provide R0>0.8 for one polarization state and T90>0.8 for the orthogonal polarization state, for light of wavelength of 550 nm, for least one reflective polarizer angle of light incidence θa.

REFERENCES:
patent: 6285423 (2001-09-01), Li et al.
patent: 6443585 (2002-09-01), Saccomanno
patent: 6788461 (2004-09-01), Kurtz et al.
patent: 6798468 (2004-09-01), Iijima

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