公开(公告)号：US20200241666A1

公开(公告)日：2020-07-30

申请号：US16755447

申请日：2018-10-18

Applicant: SYNAPTICS INCORPORATED

Inventor： Shinobu NOHTOMI

IPC: G06F3/044 ,  G06F3/041 ,  G09G3/34

Abstract: A display device comprises: a display panel comprising a plurality of pixel regions each comprising one or more pixels; a plurality of receiver electrodes respectively associated with the plurality of pixel regions and configured to supply a VCOM voltage; and data write lines configured to transmit data write signals for writing6 display data into the plurality of pixel regions. One or more but not all of the plurality of receiver electrodes fail to supply the VCOM voltage, while the display data are being written into one or more but not all of the plurality of pixel regions.6

公开(公告)号：US20210065595A1

公开(公告)日：2021-03-04

申请号：US16584301

申请日：2019-09-26

Applicant: SYNAPTICS INCORPORATED

Inventor： Shinobu NOHTOMI ,  Sosuke TSUJI

IPC: G09G3/00

Abstract: A display driver comprises a decoder, a first source amplifier and a logic circuitry. The decoder is configured to output a grayscale voltage corresponding to an image data. The first source amplifier is configured to output a first source output voltage corresponding to the grayscale voltage to a first external output terminal. The logic circuitry is configured to generate fault detection data for fault detection of a test object connected to the first external output terminal. The fault detection data is based on a comparison output signal generated based on a comparison between a reference voltage and a voltage on the first external output terminal. The comparison is performed by the first source amplifier.

公开(公告)号：US20180107309A1

公开(公告)日：2018-04-19

申请号：US15297540

申请日：2016-10-19

Applicant: SYNAPTICS INCORPORATED

Inventor： Kazuya ENDO ,  Shinobu NOHTOMI ,  Nobukazu TANAKA ,  Tomohiro HIRAKAWA ,  Hiroshi TAKEYAMA ,  Takayuki NOTO ,  Petr SHEPELEV

IPC: G06F3/041 ,  H03K17/96 ,  G09G3/36

CPC classification number: G06F3/0412 ,  G06F3/0416 ,  G09G3/3614 ,  G09G3/3655 ,  G09G2310/0289 ,  G09G2310/08 ,  G09G2330/02

Abstract: The semiconductor device is intended for connection with an in-cell type display touch panel having a plurality of common electrodes, a reference voltage for display is applied to the common electrodes in a display drive period, and the common electrodes serve as sensor electrodes in a touch detection period. The semiconductor device includes a DC level shift circuit operable to shift the DC level of a toggle signal output by a toggle drive circuit to the reference voltage. The semiconductor device supplies the reference voltage to the common electrodes of the display touch panel in the display drive period, and performs a guarding action in which at least a part of the plurality of common electrodes is supplied with a toggle signal shifted in DC level in the touch detection period.