09-05-2013 дата публикации
Номер: US20130114137A1
Принадлежит:
A polarizer includes boric acid, potassium iodide, and a zinc salt. The zinc salt has a concentration gradient in which the concentration of the zinc salt gradually decreases from a surface of the polarizer to an interior thereof 1. A polarizer comprising:boric acid;potassium iodide; anda zinc salt, wherein the zinc salt has a concentration gradient in which the concentration of the zinc salt gradually decreases from a surface of the polarizer to an interior thereof.2. The polarizer as claimed in claim 1 , wherein:on the surface of the polarizer, the concentration of the zinc salt is at least about 80% of the total concentration of the zinc salt, andat a point of about 40% of a total thickness of the polarizer from the surface thereof, the concentration of the zinc salt is about 20% or less of the total concentration of the zinc salt.3. The polarizer as claimed in claim 1 , wherein the concentration gradient has a concentration profile as defined by Equation 1:{'br': None, 'i': C', 'd', 'Ln', 'x, '()=−4.0268×()+39.129;\u2003\u2003[Equation 1]'}wherein C(d) is the concentration of the zinc salt at a depth d of the polarizer from the surface thereof, and x is a depth from the surface of the polarizer.4. The polarizer as claimed in claim 1 , wherein the polarizer includes:about 15 wt % to about 30 wt % of boric acid,about 1 wt % to about 5 wt % of potassium iodide, andabout 0.01 wt % to about 0.5 wt % of the zinc salt.5. The polarizer as claimed in claim 1 , wherein the polarizer has a ΔEvalue less than or equal to about 3.5 claim 1 , as obtained by Equation 2:{'br': None, 'i': E', 'Lc', '−Lc', 'ac', '−ac', 'bc', '−bc', 'Lc', '−Lc', 'ac', '−ac', 'bc', '−bc', 'Lc', '−Lc', 'ac', '−ac', 'bc', '−bc, 'sub': ab', '500', '0', '500', '0', '500', '0', '500', '0', '500', '0', '500', '0', '500', '0', '500', '0', '500', '0, 'sup': 2', '2', '2', '2', '2', '2', '2', '2', '2, 'Δ=√{square root over (()+()+(), )}{square root over (()+()+(), )}{square root over (()+()+(), )}\u2003\u2003 ...
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