US 11,694,473 B2
Electronic circuit having display driving function, touch sensing function and fingerprint sensing function
Huan-Teng Cheng, Hsinchu (TW); and Yuan Heng Lu, Hsinchu (TW)
Assigned to Novatek Microelectronics Corp., Hsinchu (TW)
Filed by Novatek Microelectronics Corp., Hsinchu (TW)
Filed on Jan. 14, 2021, as Appl. No. 17/149,676.
Claims priority of provisional application 63/021,662, filed on May 7, 2020.
Prior Publication US 2021/0349598 A1, Nov. 11, 2021
Int. Cl. G06F 3/041 (2006.01); G06V 40/12 (2022.01)
CPC G06V 40/1335 (2022.01) [G06F 3/0412 (2013.01); G06F 3/04164 (2019.05)] 43 Claims
OG exemplary drawing
 
1. An electronic circuit, adapted to drive a display panel comprising touch sensors and fingerprint sensors, the electronic circuit comprising:
a first circuit, configured to generate display driving signals for driving data lines of the display panel;
a second circuit, configured to receive fingerprint sensing signals corresponding to a fingerprint image from the fingerprint sensors;
a first switch circuit, located outside the display panel and electrically coupled to a second switch circuit that is located inside the display panel via a transmission line, comprising a plurality of first switch elements coupled to the first circuit and a plurality of second switch elements coupled to the second circuit, wherein the plurality of first switch elements and the plurality of second switch elements are not arranged on the display panel, and the plurality of first switch elements and the plurality of second switch elements are directly coupled to the transmission line; and
a control circuit, configured to generate control signals for controlling the first switch circuit, so as to
control the electronic circuit to transmit the display driving signals from the first circuit to the data lines through a first part of the first switch elements in a first time interval, and
control the electronic circuit to receive the fingerprint sensing signals from the fingerprint sensors of the display panel through the second switch elements in a second time interval.