US Patent No. 10,338,731

FINGERPRINT SENSOR INTEGRATED TYPE TOUCHSCREEN DEVICE


Patent No. 10,338,731
Issue Date July 02, 2019
Title Fingerprint Sensor Integrated Type Touchscreen Device
Inventorship Moonbong Song, Seoul (KR)
Kyoseop Choo, Suwon-si (KR)
Assignee LG Display Co., Ltd., Seoul (KR)

Claim of US Patent No. 10,338,731

1. A fingerprint sensor integrated type touchscreen device, comprising:a sensor array including sensors disposed in a touch sensor area and in a fingerprint and touch sensor area, and sensor lines respectively coupled to the sensors in the touch sensor area and to the sensors in the fingerprint and touch sensor area, the sensor lines including Tx lines to which sensor driving signals are applied and Rx lines that extend in a direction transverse to the Tx lines; and
a touch integrated circuit (IC) that is coupled to the sensor lines in the touch sensor area and the fingerprint and touch sensor area and that senses a touch input in a touch recognition mode, based on a change in sensor signals received from the touch sensor area and the fingerprint and touch sensor area, and senses a fingerprint in a fingerprint recognition mode, based on a change in sensor signals received from the fingerprint and touch sensor area, the touch IC including a switch array having a plurality of first switches and a plurality of second switches, all of the Rx lines in the fingerprint and touch sensor area being electrically coupled to respective ones of the first switches, all of the Rx lines in the fingerprint and touch sensor area being electrically coupled to respective ones of the second switches,
wherein, in the touch recognition mode, the plurality of second switches electrically connects a portion of the Rx lines in the fingerprint and touch sensor area to a touch sensing circuit, and in the fingerprint recognition mode, the plurality of first switches electrically connects all of the Rx lines in the fingerprint and touch sensor area to respective fingerprint sensing circuits, the portion of the Rx lines in the fingerprint and touch sensor area being fewer in number than all of the Rx lines in the fingerprint and touch sensor area,
wherein all of the Rx lines in the fingerprint and touch sensor area are separated from the Rx lines in the touch sensor area.