# US 2021/0240327 A1 · Fingerprint recognition touch sensor and electronic apparatus including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0240327 A1 - Document ID: US20210240327A1 - Status: Published application - Kind: A1 - Application number: 17/237,308 - Filed: 2021-04-22 - Published: 2021-08-05 - Earliest claimed: 2019-01-28 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Jinmyoung KIM; Dongkyun KIM; Jaechul PARK - Web page: https://patentgrep.com/patent/US20210240327A1 ## CPC - G06F 3/04164: {Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads} - G06F 3/041661: {using detection at multiple resolutions, e.g. coarse and fine scanning; using detection within a limited area, e.g. object tracking window} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06V 40/1306: {non-optical, e.g. ultrasonic or capacitive sensing} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract A touch sensor includes a plurality of parallel transmitting lines extending in a first direction, a plurality of parallel receiving lines extending in a second direction crossing the first direction, and a transmitting driver configured to, in a first mode, apply first driving signals of a first voltage, to the plurality of transmitting lines, and in a second mode, apply second driving signals of a second voltage, to the plurality of transmitting lines, the second voltage being different than the first voltage. The touch sensor further includes a signal output unit configured to receive touch signals from the plurality of receiving lines. ## Claims ### Claim 1 A touch sensor comprising: a plurality of parallel transmitting lines extending in a first direction; a plurality of parallel receiving lines extending in a second direction crossing the first direction; a transmitting driver configured to: in a fingerprint recognition mode, apply first driving signals of a first voltage, to the plurality of transmitting lines; in a low resolution touch sensing mode, apply second driving signals of a second voltage, to the plurality of transmitting lines, the second voltage being different than the first voltage; and in a high resolution touch sensing mode, apply third driving signals of a third voltage, to the plurality of transmitting lines, the third voltage being lower than the first voltage and higher than the second voltage; and a signal output unit configured to receive touch signals from the plurality of receiving lines. ### Claim 2 (depends on 1) The touch sensor of claim 1, wherein the transmitting driver comprises a plurality of transmitting groups disposed in the second direction, and wherein each of the plurality of transmitting groups comprises adjacent ones of the plurality of transmitting lines. ### Claim 3 (depends on 2) The touch sensor of claim 2, wherein the transmitting driver is further configured to: in the fingerprint recognition mode, sequentially apply one of the first driving signals of the first voltage, to each of the plurality of transmitting lines; in the low resolution touch sensing mode, sequentially apply the second driving signals of the second voltage, to each of the plurality of transmitting groups; in the high resolution touch sensing mode, apply the third driving signals of the third voltage, to first ones of the plurality of transmitting lines that are sequentially disposed in one of the plurality of transmitting groups, and then apply the third driving signals of the third voltage to second ones of the plurality of transmitting lines that are sequentially disposed in the one of the plurality of transmitting groups. ### Claim 4 (depends on 3) The touch sensor of claim 3, wherein the plurality of transmitting groups comprise a first transmitting group and a second transmitting group adjacent to the first transmitting group, and wherein the transmitting driver is further configured to, in the low resolution touch sensing mode, apply the second driving signals of the second voltage simultaneously to first ones of the plurality of transmitting lines that are disposed in the first transmitting group, and then apply the second driving signals of the second voltage simultaneously to the second ones of the plurality of transmitting lines that are disposed in the second transmitting group. ### Claim 5 (depends on 3) The touch sensor of claim 3, wherein the transmitting driver comprises: a plurality of transmitting circuits connected to the plurality of transmitting lines, respectively; a first voltage line configured to supply the first voltage to the plurality of transmitting circuits; a second voltage line configured to supply the second voltage to the plurality of transmitting circuits; and a third voltage line configured to supply the third voltage to the plurality of transmitting circuits. ### Claim 6 (depends on 5) The touch sensor of claim 5, wherein the transmitting driver is further configured to: in the fingerprint recognition mode, connect the first voltage line to the plurality of transmitting circuits; in the low resolution touch sensing mode, connect the second voltage line to the plurality of transmitting circuits; and in the high resolution touch sensing mode, connect the third voltage line to the plurality of transmitting circuits. ### Claim 7 (depends on 6) The touch sensor of claim 6, wherein the transmitting driver is further configured to: in the fingerprint recognition mode, sequentially and separately activate the plurality of transmitting circuits; in the low resolution touch sensing mode, simultaneously activate first ones of the plurality of transmitting circuits that are disposed in the one of the plurality of transmitting groups; and in the high resolution touch sensing mode, simultaneously activate second ones of the plurality of transmitting circuits that are connected to the first ones of the plurality of transmitting lines in the one of the plurality of transmitting groups, and then simultaneously activate third ones of the plurality of transmitting circuits that are connected to the second ones of the plurality of transmitting lines. ### Claim 8 (depends on 3) The touch sensor of claim 3, wherein the signal output unit comprises a plurality of receiving groups disposed in the first direction, and wherein each of the plurality of receiving groups comprises adjacent ones of the plurality of receiving lines. ### Claim 9 (depends on 8) The touch sensor of claim 8, wherein the signal output unit comprises: a plurality of first receiving circuits disposed to correspond to the plurality of receiving lines, respectively; and a plurality of second receiving circuits, wherein each of the plurality of second receiving circuits is disposed to correspond to a respective one of the plurality of receiving groups. ### Claim 10 (depends on 9) The touch sensor of claim 9, wherein the signal output unit is further configured to, in the fingerprint recognition mode: connect the plurality of receiving lines respectively to the plurality of first receiving circuits; and simultaneously receive the touch signals through all of the plurality of first receiving circuits respectively connected to the plurality of receiving lines. ### Claim 11 (depends on 10) The touch sensor of claim 10, wherein the signal output unit is further configured to, in the low resolution touch sensing mode: connect ones of the plurality of receiving lines that are disposed in one of the plurality of receiving groups to one of the plurality of second receiving circuits corresponding to the one of the plurality of receiving groups; and receive the touch signals through the one of the plurality of second receiving circuits connected to the ones of the plurality of receiving lines. ### Claim 12 (depends on 11) The touch sensor of claim 11, wherein the signal output unit is further configured to, in the high resolution touch sensing mode, receive the touch signals by connecting first ones of the plurality of receiving lines that are sequentially disposed in one of the plurality of receiving groups, to one of the plurality of second receiving circuits corresponding to the one of the plurality of receiving groups, and then receive the touch signals by connecting second ones of the plurality of receiving lines that are sequentially disposed in the one of the plurality of receiving groups, to the one of the plurality of second receiving circuits corresponding to the one of the plurality of receiving groups. ### Claim 13 (depends on 9) The touch sensor of claim 9, wherein each of the plurality of first receiving circuits comprises a first feedback capacitor having a first capacitance, and wherein each of the plurality of second receiving circuits comprises a second feedback capacitor having a second capacitance greater than the first capacitance. ### Claim 14 (depends on 3) The touch sensor of claim 3, wherein the signal output unit comprises a plurality of receiving groups disposed in the first direction, wherein each of the plurality of receiving groups comprises adjacent ones of the plurality of receiving lines, and wherein the signal output unit further comprises: a plurality of first receiving circuits disposed to correspond to the plurality of receiving lines, respectively; a second receiving circuit disposed to correspond to first ones of the plurality of receiving lines that are sequentially disposed in each of the plurality of receiving groups; and a third receiving circuit disposed to correspond to second ones of the plurality of receiving lines that are sequentially disposed in each of the plurality of receiving groups. ### Claim 15 (depends on 14) The touch sensor of claim 14, wherein the signal output unit is further configured to, in the high resolution touch sensing mode, receive the touch signals by connecting the first ones of the plurality of receiving lines sequentially disposed in each of the plurality of receiving groups, to the second receiving circuit, while receiving the touch signals by connecting the second ones of the plurality of receiving lines sequentially disposed in each of the receiving groups, to the third receiving circuit. ### Claim 16 (depends on 3) The touch sensor of claim 3, wherein the signal output unit comprises a plurality of receiving groups disposed in the first direction, wherein each of the plurality of receiving groups comprises adjacent ones of the plurality of receiving lines, and wherein the signal output unit comprises a plurality of receiving circuits disposed to correspond to the plurality of receiving lines, respectively. ### Claim 17 (depends on 16) The touch sensor of claim 16, wherein the signal output unit is further configured to: in the fingerprint recognition mode, connect the plurality of receiving lines respectively to the plurality of receiving circuits, and simultaneously receive the touch signals through all of the plurality of first receiving circuits respectively connected to the plurality of receiving lines; in the low resolution touch sensing mode, receive the touch signals by connecting first ones of the plurality of receiving lines that are disposed in one of the plurality of receiving groups, to any first one of the plurality of receiving circuits in the one of the plurality of receiving groups; and in the high resolution touch sensing mode, receive the touch signals by connecting second ones of the plurality of receiving lines that are sequentially disposed in the one of the plurality of receiving groups, to any second one of the plurality of receiving circuits in the one of the plurality of receiving groups, and connecting third ones of the plurality of receiving lines that are sequentially disposed in the plurality of receiving groups, to another one of the plurality of receiving circuits in the one of the plurality of receiving groups.