# US 2021/0344994 A1 · Display device and method for operating same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0344994 A1 - Document ID: US20210344994A1 - Status: Published application - Kind: A1 - Application number: 17/280,597 - Filed: 2019-02-18 - Published: 2021-11-04 - Earliest claimed: 2019-02-18 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Jinyoung CHOI - Web page: https://patentgrep.com/patent/US20210344994A1 ## CPC - H04N 21/4432: {Powering on the client, e.g. bootstrap loading using setup parameters being stored locally or received from the server (resetting in general G06F1/14; program loading or initiating in general G06F9/445; bootstrapping in general G06F9/4401; secure boots of computer platforms G06F21/57)} - H04N 21/42203: {sound input device, e.g. microphone} - H04N 21/43635: {HDMI} - H04N 21/485: End-user interface for client configuration - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A display device according to an embodiment of the present invention can comprise: a display unit; an external device interface unit for exchanging information with a set-top box; and a control unit which receives set-top box information from the set-top box by means of the external device interface unit, determines whether or not a high definition multimedia interface-consumer electronics control (HDMI-CEC) function is turned on on the basis of the received set-top box information, and automatically turns on an HDMI-CEC function of the display device if the HDMI-CEC function is turned on. ## Claims ### Claim at position 1 1-15. (canceled) ### Claim 16 A display device comprising: a display; an external device interface; and a controller configured to: connect with a set-top box through the external device interface, transmit display device information to the set-top box through the external device interface, wherein the display device information indicates that a High Definition Multimedia Interface-Consumer Electronics Control (HDMI-CEC) function of the display device is turned off, receive set-top box information from the set-top box through the external device interface, wherein the set-top box information includes a CEC field indicating whether a HDMI-CEC function of the set-top box is turned on or off, in response to the CEC field indicating the HDMI-CEC function of the set-top box is turned on, turn on the HDMI-CEC function of the display device, and in response to the CEC field indicating the HDMI-CEC function of the set-top box is turned off, maintain the HDMI-CEC function of the display device to be turned off. ### Claim 17 (depends on 16) The display device of claim 16, wherein the controller is configured to turn on a power of the display device when a power of the set-top box is turned on. ### Claim 18 (depends on 17) The display device of claim 17, wherein the controller is configured to switch an external input to the set-top box when the power of the display device is turned on. ### Claim 19 (depends on 16) The display device of claim 16, wherein the controller is configured to display a setting menu on the display for setting the HDMI-CEC function of the set-top box, and wherein the setting menu includes a guide indicating that power operations of the set-top box and the display device are equally performed when the HDMI-CEC function of the set-top box is turned on. ### Claim 20 (depends on 16) The display device of claim 16, wherein the set-top box information includes a manufacturer of the set-top box, a model name of the set-top box and extra information including the CEC field. ### Claim 21 (depends on 20) The display device of claim 20, wherein the extra information includes a prefix field identifying whether the extra information is present the CEC field. ### Claim 22 (depends on 21) The display device of claim 21, wherein the controller is configured to indicate that the HDMI-CEC function of the set-top box is turned off when a value of the CEC function field is a first value and indicate that the HDMI-CEC function of the set-top box is turned on when the value of the CEC function field is a second value. ### Claim 23 (depends on 16) The display device of claim 16, wherein the display device information includes information indicating that the HDMI-CEC function is capable of being automatically turned on. ### Claim 24 (depends on 16) The display device of claim 16, wherein the set-top box information includes a data packet including a plurality of byte fields, and wherein the CEC field is one of the plurality of byte fields. ### Claim 25 (depends on 24) The display device of claim 24, wherein the plurality of byte fields further include: an eight byte field indicating a vendor name of the set-top box, a six byte field indicating a model name of the set-top box, a four byte field including the CEC field, and a one byte field indicating source information of the set-top box. ### Claim 26 (depends on 25) The display device of claim 25, wherein the plurality of byte fields further include: a one byte space field between the six byte field indicating the model name and the four byte field including the CEC field, and wherein the one byte space field distinguishes between the six byte field indicating the model name and the four byte field including the CEC field. ### Claim 27 A method of operating a display device, the method comprising: connecting with a set-top box through an external device interface of the display device; transmitting, via a controller of the display device, display device information to the set-top box through the external device interface, wherein the display device information indicates that a High Definition Multimedia Interface-Consumer Electronics Control (HDMI-CEC) function of the display device is turned off; receiving, via the controller, set-top box information from the set-top box through the external device interface, wherein the set-top box information includes a CEC field indicating whether a HDMI-CEC function of the set-top box is turned on or off; in response to the CEC field indicating the HDMI-CEC function of the set-top box is turned on, turning on, via the controller, the HDMI-CEC function of the display device; and in response to the CEC field indicating the HDMI-CEC function of the set-top box is turned off, maintaining, via the controller, the HDMI-CEC function of the display device to be turned off. ### Claim 28 (depends on 27) The method of claim 27, further comprising turning on a power of the display device when a power of the set-top box is turned on. ### Claim 29 (depends on 28) The method of claim 28, further comprising switching an external input to the set-top box when the power of the display device is turned on. ### Claim 30 (depends on 27) The method of claim 27, further comprising displaying a setting menu for setting the HDMI-CEC function of the set-top box, wherein the setting menu includes a guide indicating that power operations of the set-top box and the display device are equally performed when the HDMI-CEC function of the set-top box is turned on. ### Claim 31 (depends on 27) The method of claim 27, wherein the set-top box information includes a manufacturer of the set-top box, a model name of the set-top box and extra information including the CEC field. ### Claim 32 (depends on 31) The method of claim 31, wherein the extra information further includes a prefix field identifying whether the extra information is present . ### Claim 33 (depends on 32) The method of claim 32, wherein a first value of the CEC function field indicates that the HDMI-CEC function of the set-top box is turned off and a second value of the CEC function field indicates that the HDMI-CEC function of the set-top box is turned on. ### Claim 34 (depends on 27) The method of claim 27, wherein the set-top box information includes a data packet including a plurality of byte fields, and wherein the CEC field is one of the plurality of byte fields. ### Claim 35 (depends on 34) The method of claim 34, wherein the plurality of byte fields further include: an eight byte field indicating a vendor name of the set-top box, a six byte field indicating a model name of the set-top box, a four byte field including the CEC field, and a one byte field indicating source information of the set-top box.