# US 11,442,573 B2 · Display device and driving method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,442,573 B2 - Document ID: US11442573B2 - Status: Granted - Kind: B2 - Application number: 17/367,417 - Filed: 2021-07-05 - Published: 2022-04-28 - Granted: 2022-09-13 - Earliest claimed: 2020-10-27 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Sang Hyun Lim - Web page: https://patentgrep.com/patent/US11442573B2 ## CPC - G06F 3/04162: {for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware} - G06F 3/04166: {Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184)} - G06F 3/04184: {Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A display device includes a display part and a sensor part overlapping the display part. During a first period, sensors in a first area of the sensor part are configured to transmit a first uplink signal. During the first period, sensors in a second area of the sensor part are configured to transmit a first inversion signal with respect to the first uplink signal. During a second period after the first period, sensors in a third area of the sensor part are configured to transmit a second uplink signal. During the second period, sensors in a fourth area of the sensor part are configured to transmit a second inversion signal with respect to the second uplink signal. The first area at least partially overlaps the fourth area. The second area at least partially overlaps the third area. ## Claims ### Claim 1 A display device comprising: a display part; and a sensor part overlapping the display part, wherein: during a first period, sensors in a first area of the sensor part are configured to transmit a first uplink signal; during the first period, sensors in a second area of the sensor part are configured to transmit a first inversion signal with respect to the first uplink signal; during a second period after the first period, sensors in a third area of the sensor part are configured to transmit a second uplink signal; during the second period, sensors in a fourth area of the sensor part are configured to transmit a second inversion signal with respect to the second uplink signal; the first area at least partially overlaps the fourth area; and the second area at least partially overlaps the third area. ### Claim 2 (depends on 1) The display device of claim 1, wherein: a transition direction of the first inversion signal is opposite a transition direction of the first uplink signal; and a transition direction of the second inversion signal is opposite a transition direction of the second uplink signal. ### Claim 3 (depends on 1) The display device of claim 1, wherein at least some of the sensors are configured to receive an acknowledgment signal for the first uplink signal during a third period between the first period and the second period. ### Claim 4 (depends on 3) The display device of claim 3, wherein at least some of the sensors are further configured to receive a position signal and a data signal during the third period. ### Claim 5 (depends on 3) The display device of claim 3, wherein at least some of the sensors are further configured to receive a position signal and a data signal during a fourth period after the second period. ### Claim 6 (depends on 1) The display device of claim 1, wherein at least some of the sensors are configured to receive an acknowledgment signal for the second uplink signal during a fourth period after the second period. ### Claim 7 (depends on 6) The display device of claim 6, wherein at least some of the sensors are further configured to receive a position signal and a data signal during the fourth period. ### Claim 8 (depends on 1) The display device of claim 1, wherein at least some of the sensors are configured to receive an acknowledgment signal for the first uplink signal or the second uplink signal after the second period. ### Claim 9 (depends on 8) The display device of claim 8, wherein at least some of the sensors are further configured to receive a position signal and a data signal after receiving the acknowledgment signal. ### Claim 10 (depends on 1) The display device of claim 1, wherein: during the first period, sensors in a fifth area between the first area and the second area are configured not to transmit ether of the first uplink signal and the first inversion signal; and during the second period, sensors in a sixth area between the third area and the fourth area are configured not to transmit either of the second uplink signal and the second inversion signal. ### Claim 11 (depends on 10) The display device of claim 10, wherein: the first area partially overlaps the sixth area; and the third area partially overlaps the fifth area. ### Claim 12 (depends on 10) The display device of claim 10, wherein: during the first period, the sensors in the fifth area are configured to transmit a first constant voltage signal; and during the second period, the sensors in the sixth area are configured to transmit a second constant voltage signal. ### Claim 13 (depends on 11) The display device of claim 11, wherein the fifth area and the sixth area do not overlap each other. ### Claim 14 A method of driving a display device comprising a display part and a sensor part overlapping the display part, the driving method comprising: during a first period: transmitting, by sensors in a first area of the sensor part, a first uplink signal; and transmitting, by sensors in a second area of the sensor part, a first inversion signal with respect to the first uplink signal; and in response to an acknowledgment signal for the first uplink signal not being received, during a second period after the first period: transmitting, by sensors in a third area of the sensor part, a second uplink signal; and transmitting, by sensors in a fourth area of the sensor part, a second inversion signal with respect to the second uplink signal, wherein the first area at least partially overlaps the fourth area, and wherein the second area at least partially overlaps the third area. ### Claim 15 (depends on 14) The method of driving the display device of claim 14, further comprising: in response to an acknowledgment signal for the second uplink signal being received, determining a subsequent uplink signal as the second uplink signal. ### Claim 16 (depends on 15) The method of driving the display device of claim 15, further comprising: in response to an acknowledgment signal for the first uplink signal being received, not transmitting the second uplink signal and the second inversion signal during the second period. ### Claim 17 (depends on 14) The method of driving the display device of claim 14, wherein: the first area and the fourth area are the same; and the second area and the third area are the same. ### Claim 18 (depends on 14) The method of driving the display device of claim 14, further comprising: during the first period, not transmitting, by sensors in a fifth area between the first area and the second area, either of the first uplink signal and the first inversion signal. ### Claim 19 (depends on 18) The method of driving the display device of claim 18, further comprising: during the second period, not transmitting, by sensors in a sixth area between the third area and the fourth area, either of the second uplink signal and the second inversion signal. ### Claim 20 (depends on 19) The method of driving the display device of claim 19, further comprising: during the first period, transmitting, by the sensors in the fifth area, a first constant voltage signal; and during the third period, transmitting, by the sensors in the sixth area, a second constant voltage signal.