公开(公告)号：US20190102030A1

公开(公告)日：2019-04-04

申请号：US16139963

申请日：2018-09-24

Applicant: Japan Display Inc.

Inventor： Yuto KAKINOKI ,  Naoki TAKADA

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0414 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/04166 ,  G06F3/041662 ,  G06F3/0418 ,  G06F3/04182 ,  G06F3/044 ,  G06F3/0443 ,  G06F3/0445 ,  G06F3/0446 ,  G06F2203/04105

Abstract: A display device with a touch detection function includes a touch detection electrode, first and second electrodes, a touch detection controller, and a force detection controller. The force detection controller performs interpolation processing on reference values to calculate an interpolation value when a reference force is applied to a position in an input surface at which a force has been applied by an object and calculates a force detection value based on a ratio of a detection value detected based on capacitance between first and second electrodes to the interpolation value. The position at which the force is applied is specified based on a position detected by the touch detection controller as a position of contact with the input surface by the object. The reference values are detected based on the capacitance between the first and second electrodes when the reference force is applied to reference positions.

公开(公告)号：US20180246596A1

公开(公告)日：2018-08-30

申请号：US15903897

申请日：2018-02-23

Applicant: Japan Display Inc.

Inventor： Naoki TAKADA ,  Hayato KURASAWA ,  Koji NOGUCHI ,  Takayuki NAKANISHI ,  Yasuyuki TERANISHI

IPC: G06F3/044 ,  G06F3/041 ,  H03K17/96

CPC classification number: G06F3/044 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/0418 ,  G06F2203/04108 ,  H03K17/962

Abstract: A display device includes a substrate, a plurality of detection electrodes, a drive circuit, a detector, and a first switching circuit. The detection electrodes are provided in a display area of the substrate. The drive circuit supplies a drive signal to the detection electrodes. The detector receives, from the detection electrodes, a detection signal corresponding to a capacitance change in the detection electrodes occurring when the drive signal is supplied. The first switching circuit is coupled to the detector via wiring and provided between the detection electrodes and the detector. The first switching circuit changes the number of detection electrodes electrically coupled to one of the wiring based on the detection signal.

公开(公告)号：US20170168640A1

公开(公告)日：2017-06-15

申请号：US15373201

申请日：2016-12-08

Applicant: Japan Display Inc.

Inventor： Teppei YAMADA ,  Masaki MURASE ,  Yoshiyuki IKEHATA ,  Daisuke ITO ,  Naoki TAKADA

IPC: G06F3/041 ,  G02F1/133 ,  G02F1/1362 ,  G06F3/044 ,  G02F1/1333

CPC classification number: G06F3/0416 ,  G06F3/0412 ,  G06F3/044 ,  G06F2203/04107 ,  G09G3/20

Abstract: A liquid crystal display device includes a panel unit and a driving unit driving the panel unit. The driving unit includes as operation modes a first mode in which a detection operation of a first external object is performed in units of a divided region obtained by dividing an entire surface of a touch region of the panel unit and a second mode in which a detection operation of a second external object is performed on the entire surface of the touch region of the panel unit. The first mode is a mode detecting, in units of the divided region of the panel unit, a contact position of the first external object with each divided region, and the second mode is a mode detecting, on the entire surface of the panel unit, whether or not the second external object approaches the entire surface.