Patent ID: 9459472
Filing Date: 2016-10-04
CPC Classification: G02F

Claim Text:
1. A privacy filter controllably adjustable between a wide field viewing mode and a narrow field viewing mode, to block lateral viewing and to narrow viewing angle while retaining front viewing in the narrow field mode, comprising: a first transparent substrate including a plurality of pattern elements in the form of a wire grid, each comprising a first sidewall portion, a top portion, and a second sidewall portion, and having a bottom portion between adjacent pattern elements, to form a plurality of trenches; a second transparent substrate positioned a predetermined distance apart from and opposite to the first transparent substrate, and having a planar configuration; an electrolyte filled between the first and second transparent substrates; a second transparent conductive layer disposed between the electrolyte and the second transparent substrate; a first transparent conductive layer formed on the first transparent substrate; and an electrochromic layer being formed on the first transparent conductive layer parallel to the sidewall of the wire grid of the first transparent substrate and containing an electrochromic material to transmit or absorb visible light responsive to an electrical signal applied to the first and second transparent conductive layers, wherein the electrochromic layer is an inorganic material comprising Prussian Blue or LiNiO