Patent ID: 9535199
Date: 2017-01-03
CPC Classifications: G02B,Y02E

Claim:
1. A polarization film comprising: a polarizer consisting of a single layer configured to polarize incident light in a polarization direction, the polarizer having a plurality of first polarization grooves, a plurality of second polarization grooves, a plurality of another first polarization grooves, and a plurality of another second polarization grooves, wherein the first and the another first polarization grooves are recessed from an upper surface of the polarizer, the first and the another first polarization grooves extending in a first direction and a second direction, respectively, such that a thickness of the polarizer is reduced at the plurality of the first and the another first polarization grooves, wherein at least one of the first polarization grooves intersects at least one of the another first polarization grooves, and wherein the second and the another second polarization grooves are recessed from a lower surface of the polarizer, the second and the another second polarization grooves extending in the first direction and the second direction, respectively, such that a thickness of the polarizer is reduced at the plurality of the second and the another second polarization grooves, wherein at least one of the second polarization grooves intersects at least one of the another second polarization grooves; a first transparent support at the upper surface of the polarizer, the first transparent support having a planar shape and having a lowermost portion that is above an uppermost portion of the polarizer; and a second transparent support at the lower surface of the polarizer, the second transparent support having a planar shape and having an uppermost portion that is below a lowermost portion of the polarizer, wherein a portion of the upper surface of the polarizer is flat between the first polarization grooves, and a portion of the lower surface of the polarizer is flat between the second polarization grooves.