公开(公告)号：US20180275795A1

公开(公告)日：2018-09-27

申请号：US15922239

申请日：2018-03-15

Applicant: SYNAPTICS INCORPORATED

Inventor： Seiki Takahashi

IPC: G06F3/044 ,  G06F3/047 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/047 ,  G06F2203/04103 ,  G06F2203/04112 ,  G09G2310/0264

Abstract: A display panel includes a plurality of pixel circuits; and a sense line. The plurality of pixel circuits includes a touch sensing-adapted pixel circuit including a current-driven element, a drive transistor; a hold capacitor configured to hold a voltage corresponding to a data voltage and a sense capacitor. A capacitance of the sense capacitor varies in response to contact of an object with the current-driven display panel in a vicinity of the touch sensing-adapted pixel circuit. The drive transistor is configured to supply a current to the current-driven element in response to the data voltage and supply a sense current to the sense line in response to the capacitance of the sense capacitor.

公开(公告)号：US11157106B2

公开(公告)日：2021-10-26

申请号：US16189486

申请日：2018-11-13

Applicant: SYNAPTICS INCORPORATED

Inventor： Tetsuo Tanemura ,  Seiki Takahashi ,  Joseph Kurth Reynolds ,  Petr Shepelev

IPC: G06F3/042 ,  G06F3/041 ,  G06F3/044 ,  G01L1/18 ,  G06F3/047 ,  G09G3/3208 ,  G09G3/36

Abstract: A system and method for input sensing comprises a display device having at least one piezoresistive sensing transistor. During a first period, a first resulting signal is received with a first data line by driving a first piezoresistive sensing transistor of a first subpixel of the display device with a first select signal. The first resulting signal corresponds to a change in resistance of the first piezoresistive sensing transistor. Further, at least one of force information and positional information associated with an input object may be determined at least partially based on the change in resistance.