# US 10,503,322 B2 · Projector and method of controlling projector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,503,322 B2 - Document ID: US10503322B2 - Status: Granted - Kind: B2 - Application number: 15/987,106 - Filed: 2018-05-23 - Published: 2018-11-29 - Granted: 2019-12-10 - Earliest claimed: 2017-05-29 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Yoshiyuki Furumi - Web page: https://patentgrep.com/patent/US10503322B2 ## CPC - G06F 3/0425: {using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected (tracking a projected light spot to determine a position on a display surface G06F3/0386)} - G06F 3/04817: using icons (graphical or visual programming using iconic symbols G06F8/34) - H04N 5/44504: {Circuit details of the additional information generator, e.g. details of the character or graphics signal generator, overlay mixing circuits} - H04N 9/3179: {Video signal processing therefor} - H04N 9/3194: {including sensor feedback} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A projector includes a projection section adapted to project a first image and a second image on a projection surface, an imaging section adapted to image the projection surface to generate a taken image, a detection section adapted to detect an operation on the second image based on the taken image, and a processing section adapted to perform a process corresponding to the second image in response to the detection of the operation, and the processing section is prevented from performing the process during a first period starting from when a change occurs in the first image. ## Claims ### Claim 1 A projector comprising: a projection section adapted to project a first image and a second image on a projection surface; an imaging section adapted to image the projection surface to generate a taken image; and one or more processors programmed to detect an operation on the second image based on the taken image, and perform a process on at least one of the first and second images projected on the projection surface corresponding to the operation on the second image in response to the detection of the operation, wherein the one or more processors are prevented from performing the process on the at least one of the first and second images during a first period starting from when a change occurs in the first image. ### Claim 2 (depends on 1) The projector according to claim 1, wherein the one or more processors prevent the projection section from projecting the second image during the first period starting from when the change occurs in the first image. ### Claim 3 (depends on 1) The projector according to claim 1, wherein the one or more processors are further programmed to change the first period in accordance with change information related to a change of the first period. ### Claim 4 (depends on 3) The projector according to claim 3, wherein the change information relates to a second length of the first period selected by a user, and the one or more processors change a first length of the first period to the second length selected by the user. ### Claim 5 (depends on 1) The projector according to claim 1, wherein the imaging section is prevented from generating the taken image during the first period starting from when the change occurs in the first image. ### Claim 6 (depends on 1) The projector according to claim 1, wherein the one or more processors are prevented from detecting the operation during the first period starting from when the change occurs in the first image. ### Claim 7 (depends on 1) The projector according to claim 1, wherein the operation on the second image is an operation by a user to touch the second image. ### Claim 8 (depends on 1) The projector according to claim 1, wherein the process is a positional manipulation of the first image. ### Claim 9 (depends on 1) The projector according to claim 1, wherein the change that occurs in the first image is adding a visual element to the first image. ### Claim 10 A method of controlling a projector adapted to project an image on a projection surface, comprising: projecting a first image and a second image on the projection surface; imaging the projection surface to generate a taken image; detecting an operation on the second image based on the taken image; and performing a process on at least one of the first and second images projected on the projection surface corresponding to the operation on the second image in response to the detection of the operation, wherein the process on the at least one of the first and second images is prevented from being performed during a first period starting from when a change occurs in the first image in the performing the process. ### Claim 11 (depends on 10) The method according to claim 10, wherein the operation on the second image is an operation by a user to touch the second image. ### Claim 12 (depends on 10) The method according to claim 10, wherein the process is a positional manipulation of the first image. ### Claim 13 (depends on 10) The method according to claim 10, wherein the change that occurs in the first image is adding a visual element to the first image. ### Claim 14 (depends on 10) The method according to claim 10, wherein the first period is changed in accordance with change information related to a change of the first period, the change information relates to a second length of the first period selected by a user, and a first length of the first period is changed to the second length selected by the user.