Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Reexamination Certificate
2007-04-13
2011-12-20
Healy, Brian M. (Department: 2883)
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
C349S061000, C349S065000, C349S067000, C349S069000, C349S096000, C362S097100, C362S097200, C362S600000, C362S609000, C428S001310
Reexamination Certificate
active
08081270
ABSTRACT:
The present invention relates generally to backlight modules for display devices and liquid crystal displays incorporating the same, and more particularly, to a backlight module for generating light with a single polarization state. The present invention provides a backlight module, comprising an optical cavity for reflecting and depolarizing light that is incident upon a front surface of said optical cavity and a multilayer polarizer comprising a plurality of layers. Said multilayer polarizer faces the front surface of the optical cavity and the layers are arranged in such a way that a light of polarization substantially parallel to the transmission axis of said multilayer polarizer is substantially transmitted and the light of substantially orthogonal polarization is substantially reflected by said multilayer polarizer in at least one predetermined wavelength subrange of the visible wavelength range. At least one of said layers comprises rod-like supramolecules forming at least partially a three-dimensional structure in the layer. The present invention also provides a liquid crystal display, comprising a liquid crystal cell, a front polarizer, and a backlight module according to the first aspect of the present invention. The multilayer polarizer of the backlight module faces the back panel and serves as a back polarizer of the liquid crystal display.
REFERENCES:
patent: 2004/0142183 (2004-07-01), Lazarev et al.
patent: 2004/0157122 (2004-08-01), Naoi et al.
patent: 2005/0195340 (2005-09-01), Lazarev
patent: WO 2005051926 (2005-06-01), None
Blevins Jerry
Crysoptix, KK
Healy Brian M.
Houst Consulting
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