# US 11,239,911 B2 · Display apparatus and control method for display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,239,911 B2 - Document ID: US11239911B2 - Status: Granted - Kind: B2 - Application number: 16/970,166 - Filed: 2019-02-11 - Published: 2021-04-08 - Granted: 2022-02-01 - Earliest claimed: 2018-03-23 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Jaewoong Jung - Web page: https://patentgrep.com/patent/US11239911B2 ## CPC - H04B 10/0795: {Performance monitoring; Measurement of transmission parameters} - H04B 10/07955: {Monitoring or measuring power} - G06F 3/14: Digital output to display device {; Cooperation and interconnection of the display device with other functional units} - H04B 10/25: Arrangements specific to fibre transmission - H04B 10/25751: {Optical arrangements for CATV or video distribution (adaptations of television systems for optical transmission H04N7/22)} - H04B: TRANSMISSION - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A display apparatus is disclosed. The display apparatus includes: an optical communication interface configured to communicate with an electronic device through an optical cable; and a processor for, when an optical signal including at least one signal among an image signal and a sound signal is received from the electronic device through the optical communication interface, measuring a strength of the received optical signal, and controlling an operation of the display apparatus related to a state of the optical cable, on the basis of the measured strength of the optical signal. ## Claims ### Claim 1 A display apparatus comprising: an optical communication interface configured to communicate with an electronic device through an optical cable; and a processor configured to: based on an optical signal including at least one signal among an image signal and a sound signal being received from the electronic device through the optical communication interface, measure a strength of the received optical signal, and control an operation of the display apparatus related to a state of the optical cable based on the measured strength of the optical signal, wherein the processor is further configured to: based on the measured strength of the optical signal being smaller than a first threshold value, transmit a control signal for increasing a strength of transmission of the optical signal of the electronic device to the electronic device, and based on the strength of the optical signal measured after transmitting the control signal to the electronic device being identical to the strength of the optical signal measured before transmitting the control signal to the electronic device, determine that the optical cable is defective. ### Claim 2 (depends on 1) The display apparatus of claim 1, further comprising: an outputter, wherein the processor is further configured to: based on the measured strength of the optical signal being smaller than a second threshold value, output a notification indicating that the optical cable is defective through the outputter. ### Claim 3 (depends on 1) The display apparatus of claim 1, further comprising: an outputter, wherein the processor is further configured to: based on the measured strength of the optical signal being smaller than the first threshold value and greater than or equal to a second threshold value, transmit a control signal for increasing a strength of transmission of the optical signal of the electronic device to the electronic device, and based on the measured strength of the optical signal being smaller than the second threshold value, output a notification indicating that the optical cable is defective through the outputter. ### Claim 4 A display apparatus comprising: an optical communication interface configured to communicate with an electronic device through an optical cable; and a processor configured to: based on an optical signal including at least one signal among an image signal and a sound signal being received from the electronic device through the optical communication interface, measure a strength of the received optical signal, and control an operation of the display apparatus related to a state of the optical cable based on the measured strength of the optical signal, wherein the optical communication interface includes a plurality of channels, and wherein the processor is further configured to: measure a strength of each of optical signals of the plurality of channels, sum up the measured strength of each of the optical signals of the plurality of channels, and control the operation of the display apparatus based on the summed up strength of each of the optical signals. ### Claim 5 (depends on 1) The display apparatus of claim 1, comprising: a communicator configured to communicate with a user terminal apparatus, wherein the processor is further configured to: based on the measured strength of the optical signal being smaller than a second threshold value, control the communicator to transmit a message informing that the optical cable is defective to the user terminal apparatus. ### Claim 6 A method for controlling a display apparatus comprising an optical communication interface configured to communicate with an electronic device through an optical cable, the method comprising: receiving an optical signal including at least one signal among an image signal and a sound signal from the electronic device; measuring a strength of the received optical signal; and controlling an operation of the display apparatus related to a state of the optical cable based on the measured strength of the optical signal, wherein the controlling comprises: based on the measured strength of the optical signal being smaller than a first threshold value, transmitting a control signal for increasing a strength of transmission of the optical signal of the electronic device to the electronic device, and based on the strength of the optical signal measured after transmitting the control signal to the electronic device being identical to the strength of the optical signal measured before transmitting the control signal to the electronic device, determining that the optical cable is defective. ### Claim 7 (depends on 6) The method of claim 6, wherein the controlling comprises: based on the measured strength of the optical signal being smaller than a second threshold value, outputting a notification indicating that the optical cable is defective. ### Claim 8 (depends on 6) The method of claim 6, wherein the controlling comprises: based on the measured strength of the optical signal being smaller than the first threshold value and greater than or equal to a second threshold value, transmitting a control signal for increasing a strength of transmission of the optical signal of the electronic device to the electronic device, and based on the measured strength of the optical signal being smaller than the second threshold value, outputting a notification indicating that the optical cable is defective. ### Claim 9 A method for controlling a display apparatus comprising an optical communication interface configured to communicate with an electronic device through an optical cable, the method comprising: receiving an optical signal including at least one signal among an image signal and a sound signal from the electronic device; measuring a strength of the received optical signal; and controlling an operation of the display apparatus related to a state of the optical cable based on the measured strength of the optical signal, wherein the optical communication interface includes a plurality of channels, and wherein the measuring comprises: measuring a strength of each of optical signals of the plurality of channels, and summing up the measured strength of each of the optical signals of the plurality of channels, and wherein the controlling comprises: controlling the operation of the display apparatus based on the summed up strength of each of the optical signals. ### Claim 10 (depends on 6) The method of claim 6, wherein the controlling comprises: based on the measured strength of the optical signal being smaller than a second threshold value, transmitting a message informing that the optical cable is defective to a user terminal apparatus. ### Claim 11 A display system comprising: an electronic device which converts at least one signal among an image signal and a sound signal into an optical signal, and transmits the converted optical signal to a display apparatus through an optical cable; and a display apparatus which, based on receiving the converted optical signal from the electronic device through the optical cable, converts the received optical signal and outputs at least one signal among the image signal and the sound signal, wherein the display apparatus is configured to: based on receiving the optical signal, measure a strength of the received optical signal, and perform an operation related to a state of the optical cable based on the measured strength of the optical signal, and wherein the display apparatus is further configured to: based on the measured strength of the optical signal being smaller than a first threshold value, transmit a control signal for increasing a strength of transmission of the optical signal of the electronic device to the electronic device, and based on the strength of the optical signal measured after transmitting the control signal to the electronic device being identical to the strength of the optical signal measured before transmitting the control signal to the electronic device, determine that the optical cable is defective.