Abstract:
The present disclosure is directed to backlighting systems, which include first and second lightguides, at least one light source optically connected to an edge of the first lightguide and at least one light source optically connected to an edge of the second lightguide for supplying light into their respective interiors. In the appropriate exemplary embodiments, the backlighting systems of the present disclosure include an extractor disposed at a surface of the second lightguide for diffuse extraction of light from the interior of the second lightguide. In such exemplary embodiments, at least a portion of the light supplied into the interior of the second lightguide and then diffusely extracted therefrom enters the interior of the first lightguide through a substantially optically clear surface. In some exemplary embodiments, the backlighting systems of the present disclosure include recycling enhancement structures, which may be attached to the first lightguide.
Abstract:
Described is an optical film having a structured surface including a plurality of prismatic structures. Each prismatic structure has a base including at least two longer sides disposed opposite to each other along a first general direction and at least two shorter sides disposed opposite to each other along a second general direction. The body transmits light incident thereon along the first general direction when an angle of incidence is within a first predetermined angle range with respect to the axis and reflects light when the angle of incidence is outside the first predetermined angle range. The body transmits light incident thereon along the second general direction when an angle of incidence is within a second predetermined angle range with respect to the axis and reflects light when the angle of incidence is outside the second predetermined angle range. The optical film further includes a substrate portion having an additional optical characteristic different from an optical characteristic of the structured surface. Display devices including such optical films are also disclosed.
Abstract:
A cutting tool assembly having a tool post capable of lateral movement along a work piece to be cut and an actuator with at least one machined tool tip and possibly other tool tips. The actuator provides for control of the movement of the tool tip in an x-direction into and out of the work piece in order to make continuous or discontinuous microstructures in it. The machined tool tip provides for microstructures within microstructures. The machined work piece can be used to make microstructured articles such as films having non-adjacent lenslets.
Abstract:
A cutting tool assembly having a tool post capable of lateral movement along a work piece to be cut and an actuator with a tool tip. The actuator provides for control of the movement of the tool tip in an x-direction into and out of the work piece in order to make discontinuous microstructures in it. The machined work piece can be used to make microstructured articles such as films having non-adjacent lenslets.
Abstract:
The present disclosure is directed to optical films having a first surface and a structured surface, the structured surface comprising a plurality of prismatic structures. Each prismatic structure has a base including at least two first sides and at least two second sides. At least one of the first and second sides of at least one of the plurality of prismatic structures is offset with respect to at least one of the first and second sides of at least one other prismatic structure.