# US 11,897,150 B2 · Electronic device projecting different light patterns for different functions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,897,150 B2 - Document ID: US11897150B2 - Status: Granted - Kind: B2 - Application number: 18/088,798 - Filed: 2022-12-27 - Published: 2023-05-04 - Granted: 2024-02-13 - Earliest claimed: 2018-10-11 - Applicants: PixArt Imaging Inc. - Inventors: Guo-Zhen Wang - Web page: https://patentgrep.com/patent/US11897150B2 ## CPC - A47L 9/30: Arrangement of illuminating devices - B25J 9/1697: {Vision controlled systems} - A47L 9/2826: {the condition of the floor} - A47L 11/4061: {Steering means; Means for avoiding obstacles; Details related to the place where the driver is accommodated} - B25J 9/1666: {Avoiding collision or forbidden zones} - B25J 11/0085: {Cleaning} - G01S 7/4815: {using multiple transmitters} - G01S 17/48: Active triangulation systems, i.e. using the transmission and reflection of electromagnetic waves other than radio waves - G01S 17/88: Lidar systems specially adapted for specific applications - G01S 17/931: of land vehicles - G05D 1/0238: {using obstacle or wall sensors (G05D1/0246 and G05D1/0289 take precedence; lidar systems designed for anti-collision purposes G01S17/93)} - A47L 2201/04: Automatic control of the travelling movement; Automatic obstacle detection - A47L 2201/06: Control of the cleaning action for autonomous devices; Automatic detection of the surface condition before, during or after cleaning - A47L: DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B9/00; laundry D06F); SUCTION CLEANERS IN GENERAL (cleaning in general B08) - B25J: MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES ({manipulators specially adapted for use in surgery A61B34/70; manipulators used in cleaning hollow articles B08B9/04}; manipulators associated with rolling mills B21B39/20; manipulators associated with forging machines B21J13/10; {manipulators associated with picking-up and placing mechanisms B23P19/007}; means for holding wheels or parts thereof B60B30/00; {vehicles with ground-engaging propulsion means, e.g. walking members B62D57/02, B62D57/032; devices for picking-up and depositing articles or materials between conveyors B65G47/90, B65G47/91; manipulators with gripping or holding means for transferring packages B65H67/065}; cranes B66C; {manipulators used in the protection or supervision of pipe-line installations F17D5/00; walking equipment adapted for nuclear steam-generators F22B37/006}; manipulators specially adapted for, or associated with, nuclear reactors G21C; {apparatus used for handling wafers during manufacture or treatment of semiconductor H10P72/50}) - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - G05D: SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES ## Abstract There is provided an electronic device including a light source module, an image sensor and a processor. The light source module projects a first pattern and a second pattern toward a moving direction. The image sensor captures an image of the first pattern and an image of the second pattern. The processor calculates one-dimensional depth information according to the image of the first pattern and calculates two-dimensional depth information according to the image of the second pattern. ## Claims ### Claim 1 An electronic device, comprising: a first optical element; a first light source configured to project a first pattern through the first optical element; a second optical element; a second light source configured to project a second pattern through the second optical element, wherein the second pattern is different from the first pattern and for identifying an appearance of an obstacle; and an image sensor configured to acquire an image of the first pattern and an image of the second pattern. ### Claim 2 (depends on 1) The electronic device as claimed in claim 1, wherein the first pattern is within a region of the second pattern. ### Claim 3 (depends on 2) The electronic device as claimed in claim 2, wherein the first light source and the second light source are turned on simultaneously, and a dominant wavelength of the first light source is different from that of the second light source. ### Claim 4 (depends on 2) The electronic device as claimed in claim 2, wherein the first light source and the second light source are turned on sequentially. ### Claim 5 (depends on 1) The electronic device as claimed in claim 1, wherein the first pattern is outside of a region of the second pattern. ### Claim 6 (depends on 1) The electronic device as claimed in claim 1, wherein a projected angle of the first pattern is different from that of the second pattern. ### Claim 7 (depends on 1) The electronic device as claimed in claim 1, further comprising a processor configured to identify whether there is the obstacle according to the image of the first pattern. ### Claim 8 (depends on 7) The electronic device as claimed in claim 7, wherein the processor is further configured to turn on the first light source but turn off the second light source when identifying no obstacle in the image of the first pattern. ### Claim 9 (depends on 7) The electronic device as claimed in claim 7, wherein the processor is further configured to identify a distance from the obstacle according to the image of the first pattern, and control the electronic device to turn to move in a direction parallel to the obstacle when the distance is identical to a predetermined distance. ### Claim 10 (depends on 9) The electronic device as claimed in claim 9, wherein the image sensor comprises a linear pixel array, and when the electronic device is moving parallel to the obstacle, the processor is further configured to control the electronic device to maintain the predetermined distance to move parallel to the obstacle according to an image size of the obstacle detected by the linear pixel array. ### Claim 11 An electronic device, comprising: a first optical element, disposed at a first position of the electronic device; a first light source configured to project a first pattern through the first optical element; a second optical element, disposed at a second position, different from the first position, of the electronic device; a second light source configured to project a second pattern, different from the first pattern, through the second optical element; and an image sensor configured to acquire an image of the first pattern and an image of the second pattern. ### Claim 12 (depends on 11) The electronic device as claimed in claim 11, wherein the first pattern is within a region of the second pattern. ### Claim 13 (depends on 12) The electronic device as claimed in claim 12, wherein the first light source and the second light source are turned on simultaneously, and a dominant wavelength of the first light source is different from that of the second light source. ### Claim 14 (depends on 12) The electronic device as claimed in claim 12, wherein the first light source and the second light source are turned on sequentially. ### Claim 15 (depends on 11) The electronic device as claimed in claim 11, wherein the first pattern is outside of a region of the second pattern. ### Claim 16 (depends on 11) The electronic device as claimed in claim 11, wherein a projected angle of the first pattern is different from that of the second pattern. ### Claim 17 (depends on 11) The electronic device as claimed in claim 11, further comprising a processor configured to identify whether there is an obstacle according to the image of the first pattern, and identify an appearance of the obstacle according to the image of the second pattern. ### Claim 18 (depends on 17) The electronic device as claimed in claim 17, wherein the processor is configured to turn on the first light source but turn off the second light source when identifying no obstacle in the image of the first pattern. ### Claim 19 (depends on 17) The electronic device as claimed in claim 17, wherein the processor is further configured to identify a distance from the obstacle according to the image of the first pattern, and control the electronic device to turn to move in a direction parallel to the obstacle when the distance is identical to a predetermined distance. ### Claim 20 (depends on 19) The electronic device as claimed in claim 19, wherein the image sensor comprises a linear pixel array, and when the electronic device is moving parallel to the obstacle, the processor is further configured to control the electronic device to maintain the predetermined distance to move parallel to the obstacle according to an image size of the obstacle detected by the linear pixel array.