US 11,721,123 B2
Electronic circuit having display driving function, touch sensing function and fingerprint sensing function
Wei-Lun Shih, Hsinchu (TW); Tzu-Wen Hsieh, Hsinchu (TW); Huan-Teng Cheng, Hsinchu (TW); Huang-Chin Tang, Hsinchu County (TW); Yueh-Teng Mai, Hsinchu (TW); Shi-Hao Huang, Hsinchu County (TW); and Jung-Chung Lee, Taoyuan (TW)
Assigned to Novatek Microelectronics Corp., Hsinchu (TW)
Filed by Novatek Microelectronics Corp., Hsinchu (TW)
Filed on Jan. 4, 2022, as Appl. No. 17/567,907.
Application 17/567,907 is a continuation of application No. 16/921,921, filed on Jul. 6, 2020, granted, now 11,270,095.
Claims priority of provisional application 62/889,572, filed on Aug. 21, 2019.
Prior Publication US 2022/0130166 A1, Apr. 28, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/041 (2006.01); G09G 5/10 (2006.01); G09G 3/20 (2006.01); G06V 40/13 (2022.01)
CPC G06V 40/1318 (2022.01) [G09G 5/10 (2013.01); G06F 3/0416 (2013.01); G09G 2320/0626 (2013.01)] 26 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 touch sensing circuit, configured to sense a touch of a finger and determine a first area corresponding to the touch on the display panel;
a fingerprint sensing circuit, configured to sense a fingerprint image of the finger corresponding to the first area of the display panel; and
a display driving circuit, configured to drive pixels of the first area with respective first gray levels and pixels of a second area outside the first area with respective second gray levels,
wherein the display driving circuit processes respective third gray levels to obtain the respective second gray levels, and the display driving circuit generates gamma voltages corresponding to the respective first gray levels and the respective second gray levels according to a same gamma curve.