# US 9,435,910 B2 · Light sensing device for detecting gestures having a casing with a lens receiving aperture disposed immediately adjacent to a display screen > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,435,910 B2 - Document ID: US9435910B2 - Status: Granted - Kind: B2 - Application number: 13/675,045 - Filed: 2012-11-13 - Published: 2013-05-30 - Granted: 2016-09-06 - Earliest claimed: 2011-11-29 - Assignees: Maxim Integrated Products, Inc. - Applicants: Maxim Integrated Products, Inc. - Inventors: Sunny K. Hsu - Web page: https://patentgrep.com/patent/US9435910B2 ## CPC - G01V 8/10: Detecting, e.g. by using light barriers (by reflection from the object G01S17/00) - G06F 3/042: by opto-electronic means - G06F 3/04883: for inputting data by handwriting, e.g. gesture or text - G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices - G06F 2203/04108: Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction - G01V: GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS (means for indicating the location of accidentally buried, e.g. snow-buried, persons A63B29/02) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Light sensing devices are described that have a lens to focus light. In one or more implementations, the light sensing devices include a substrate having a photodetector formed thereon. The photodetector is capable of detecting light and providing a signal in response thereto. The devices also include a display screen that allows light to at least substantially pass through the display screen. An optical baffle extends above a surface of the substrate to display screen and is configured to at least substantially prevent transmission of optical crosstalk to the photodetector. The devices also include a lens disposed proximate to the display screen. The lens is configured to focus light incident upon the lens and to pass the focused light to the photodetector. ## Claims ### Claim 1 A light sensing device comprising: a substrate having a surface; a photodetector disposed over the surface of the substrate, the photodetector configured to detect light and to provide a signal in response thereto; an optical baffle extending from the surface to a display screen, the optical baffle configured to at least substantially prevent transmission of optical crosstalk to the photodetector; a casing having an exterior surface and an interior surface, the casing at least partially disposed over the substrate and the photodetector, the casing defining a lens receiving aperture, the lens receiving aperture positioned over the photodetector; and a lens having an exterior surface co-planar with the exterior surface of the casing and an interior surface extending beyond a plane defined by the interior surface of the casing, the lens disposed within the lens receiving aperture, the lens configured to focus light incident upon the lens and to pass the focused light to the photodetector. ### Claim 2 (depends on 1) The light sensing device as recited in claim 1, wherein the display screen is a scratch-resistance glass material. ### Claim 3 (depends on 1) The light sensing device as recited in claim 1, wherein the photodetector comprises a quad segmented photodetector. ### Claim 4 (depends on 1) The light sensing device as recited in claim 1, wherein the photodetector is configured to generate an un-lock signal. ### Claim 5 A light sensing device comprising: a substrate having a surface; an illumination source disposed over the surface of the substrate, the illumination source configured to generate light; a photodetector disposed over the surface of the substrate, the photodetector configured to detect light emitted from the illumination source and to provide a signal in response thereto; an optical baffle disposed between the illumination source and the photodetector, the optical baffle configured to at least substantially prevent optical crosstalk between the illumination source and the photodetector; a casing having an exterior surface and an interior surface, the casing at least partially disposed over the substrate and the photodetector, the casing defining a lens receiving aperture, the lens receiving aperture positioned over the photodetector; and a lens having an exterior surface co-planar with the exterior surface of the casing and an interior convex surface extending beyond a plane defined by the interior surface of the casing, the lens disposed within the lens receiving aperture, the lens configured to focus light incident upon the lens and to pass the focused light to the photodetector, wherein the illumination source is disposed adjacent to the optical baffle. ### Claim 6 (depends on 5) The light sensing device as recited in claim 5, wherein the display screen is a scratch-resistance glass material. ### Claim 7 (depends on 5) The light sensing device as recited in claim 5, wherein the photodetector comprises a quad segmented photodetector. ### Claim 8 (depends on 5) The light sensing device as recited in claim 5, wherein the photodetector is configured to generate an un-lock signal. ### Claim 9 A light sensing device comprising: a substrate having a surface; an illumination source disposed directly adjacent to the surface of the substrate, the illumination source configured to generate light; a photodetector disposed directly adjacent to the surface of the substrate, the photodetector configured to detect light emitted from the illumination source and to provide a signal in response thereto; a lens configured to be disposed proximate to a display screen, the lens configured to focus light incident upon the lens and to pass the focused light to the photodetector; and a lens support structure disposed between the surface of the substrate and the display screen, the lens support structure including a first support portion and a second support portion, the first and the second support portions configured to hold the lens over the photodetector, the second support portion comprising an optical baffle configured to at least substantially prevent optical crosstalk between the illumination source and the photodetector, wherein the illumination source is disposed immediately adjacent to the second support portion. ### Claim 10 (depends on 9) The light sensing device as recited in claim 9, wherein the display screen is a scratch-resistance glass material. ### Claim 11 (depends on 9) The light sensing device as recited in claim 9, wherein the photodetector comprises a quad segmented photodetector. ### Claim 12 (depends on 9) The light sensing device as recited in claim 9, wherein the photodetector is configured to generate an un-lock signal.