Patent ID: 9185277
Filing Date: 2015-11-10
Classification: G06F

Abstract:
1. An optical touch screen comprising: a lens panel comprising a plurality of narrow-angle lenses and a plurality of wide-angle lenses, the plurality of narrow angle lenses and the plurality of wide angle lenses being arranged in a two-dimensional (2D) array; an infrared light source disposed under the lens panel; and a light-detection panel disposed between the lens panel and the infrared light source, comprising a plurality of first light-detectors and a plurality of second light-detectors, the plurality of first light detectors and the plurality of second light detectors being arranged in a 2D array, wherein one of the plurality of first light-detectors receives light passing through one of the plurality of narrow-angle lenses from outside, and wherein one of the second plurality of light-detectors detects infrared light emitted from the infrared light source and detects infrared light reflected by an object that is in contact with or is proximate to the optical touch screen, wherein the one of the plurality of narrow-angle lenses comprises: a micro lens comprising a conical transparent body portion; and a light guide connected to the conical transparent body portion, wherein the one of the plurality of narrow-angle lenses and one of the plurality of wide-angle lenses is positioned in one of a plurality of pixel regions, wherein the one of the plurality of first light-detectors corresponds to the one of the plurality of narrow-angle lenses, wherein the one of the plurality of second light-detectors corresponds to the one of the plurality of the wide-angle lenses, and wherein each of the plurality of pixel regions is provided with a respective one of the plurality of narrow-angle lenses and a respective one of the plurality of wide-angle lenses such that the plurality of narrow-angle lenses are arranged alternately with respect to the plurality of wide-angle lenses.