Light management films for displays
View Patent ↗Microlens arrays include a substrate, an array of microlenses on a first side of the substrate and an aperture mask on a second side of the substrate. The aperture mask includes an array of apertures at optical axes of the lenses. A second array of apertures may be included in the aperture mask at randomized positions therein. The randomized apertures may be provided in the aperture mask by providing a diffusive layer between the aperture mask and the substrate, and directing coherent radiation through the lens array, the diffusive layer and aperture mask.
1. A light management film for a Liquid Crystal Display (LCD) comprising:
an optically transparent substrate;
an array of microstructures on a first side of the substrate; and
an optically reflective layer, including apertures therein, the optically reflective layer being located on a second side of the substrate opposite the first side wherein an optically reflective surface of the optically reflective layer is uncoated facing an illumination source for the LCD.
2. A video display comprising:
an image display configured to provide an image thereon for transmission to a viewer beyond the video display; and
a light management film between the image display and the viewer, the light management film comprising:
an optically transparent substrate;
an array of microstructures on a first side of the substrate; and
an optically reflective layer, including apertures therein, the optically reflective layer being located on a second side of the substrate opposite the first side wherein an optically reflective surface of the optically reflective layer is uncoated facing an illumination source of the video display.