公开(公告)号：US20230198522A1

公开(公告)日：2023-06-22

申请号：US18112465

申请日：2023-02-21

Applicant: Japan Display Inc.

Inventor： Akihiko Fujisawa, ,  Kaoru Ito ,  Daichi Abe

IPC: H03K17/96 ,  G06F3/04883 ,  G06F3/041

CPC classification number: H03K17/96 ,  G06F3/04883 ,  G06F3/0412 ,  G06F3/0448

Abstract: According to one embodiment, a display device includes a display area, a first sensor electrode, a second sensor electrode and a detector. The display area displays an image. The first sensor electrode is disposed in a peripheral area surrounding the display area. The second sensor electrode is disposed in the peripheral area and disposed adjacent to the first sensor electrode. The detector is electrically connected to the first sensor electrode and the second sensor electrode. The first sensor electrode and the second sensor electrode both have a body portion and a comb tooth portion having a plurality of linear electrodes. A comb tooth portion of the first sensor electrode and a comb tooth portion of the second sensor electrode are disposed at mutually different locations.

公开(公告)号：US11995260B2

公开(公告)日：2024-05-28

申请号：US18119561

申请日：2023-03-09

Applicant: Japan Display Inc.

Inventor： Daichi Abe ,  Akihiko Fujisawa

IPC: G06F3/041 ,  G02F1/1362

CPC classification number: G06F3/0412 ,  G02F1/136218 ,  G06F2203/04101

Abstract: According to one embodiment, a display device includes a display area for displaying an image, a plurality of detection electrodes and a movable electrode. The plurality of detection electrodes are disposed in a peripheral area surrounding the display area. The movable electrode is disposed in such a way as to surround the detection electrodes and is movable around the detection electrodes. The movable electrode has a length corresponding to a length of each of the detection electrodes in a peripheral direction.

公开(公告)号：US11567615B2

公开(公告)日：2023-01-31

申请号：US17577492

申请日：2022-01-18

Applicant: Japan Display Inc.

Inventor： Akihiko Fujisawa ,  Kaoru Ito ,  Daichi Abe

IPC: G06F3/041 ,  G06F3/044

Abstract: According to one embodiment, a display device includes a first substrate, a second substrate opposed to the first substrate, detection electrodes provided to surround a display area where an image is displayed, and a common electrode provided over an entire surface of the display area. The common electrode includes a first lead wiring line that extends to a peripheral area around the display area, along a boundary part between a first detection electrode, which is one of the detection electrodes, and a second detection electrode adjacent to the first detection electrode. A capacitance formed between the first lead wiring line and the first detection electrode is substantially equal to a capacitance formed between the first lead wiring line and the second detection electrode.

公开(公告)号：US11262867B2

公开(公告)日：2022-03-01

申请号：US17217058

申请日：2021-03-30

Applicant: Japan Display Inc.

Inventor： Akihiko Fujisawa ,  Daichi Abe ,  Kaoru Ito

IPC: G06F3/041 ,  G06F3/044 ,  G06K9/00

Abstract: A technology which can improve the accuracy of touch detection is proposed. A display device includes: a touch panel including plural drive electrodes and plural detection electrodes; plural peripheral wirings; and plural switching elements each of which is disposed between a detection electrode and the corresponding peripheral wiring and that is connected to the detection electrode and the corresponding peripheral electrode. The touch panel executes detection by means of a mutual detection scheme using the plural drive electrodes and the plural detection electrodes. In a condition in which a predefined voltage is applied to the peripheral wirings when the plural switching elements are in an off-state, the voltages of the drive electrodes are changed, and subsequently a condition in which the changes of the voltages of the drive electrodes can be detected from the peripheral wirings is set, and the switching elements are turned from off to on.

公开(公告)号：US11762496B2

公开(公告)日：2023-09-19

申请号：US17674517

申请日：2022-02-17

Applicant: Japan Display Inc.

Inventor： Akihiko Fujisawa ,  Daichi Abe ,  Kaoru Ito

IPC: G06F3/041 ,  G06F3/044 ,  G06V40/13

CPC classification number: G06F3/04164 ,  G06F3/0418 ,  G06F3/0446 ,  G06F3/04166 ,  G06V40/1306

Abstract: A technology which can improve the accuracy of touch detection is proposed. A display device includes: a touch panel including plural drive electrodes and plural detection electrodes; plural peripheral wirings; and plural switching elements each of which is disposed between a detection electrode and the corresponding peripheral wiring and that is connected to the detection electrode and the corresponding peripheral electrode. The touch panel executes detection by means of a mutual detection scheme using the plural drive electrodes and the plural detection electrodes. In a condition in which a predefined voltage is applied to the peripheral wirings when the plural switching elements are in an off-state, the voltages of the drive electrodes are changed, and subsequently a condition in which the changes of the voltages of the drive electrodes can be detected from the peripheral wirings is set, and the switching elements are turned from off to on.

公开(公告)号：US11656724B2

公开(公告)日：2023-05-23

申请号：US17406397

申请日：2021-08-19

Applicant: Japan Display Inc.

Inventor： Akihiko Fujisawa ,  Kaoru Ito ,  Daichi Abe

IPC: G06F3/044 ,  G06F3/041 ,  G04G21/08 ,  G02F1/1333

CPC classification number: G06F3/044 ,  G02F1/13338 ,  G04G21/08 ,  G06F3/0412

Abstract: According to one embodiment, a display device includes a first substrate, a second substrate opposing the first substrate, a liquid crystal layer, at least one first detection electrode disposed in a display area and a plurality of second detection electrodes disposed in a peripheral area. In a display period in which images are displayed on the display area, a predetermined voltage is applied to the first detection electrode to drive the liquid crystal layer, and in a period in which the liquid crystal layer is not driven, the first detection electrode is set to a state of being not electrically connected to anywhere or being connected to a predetermined potential with an impedance of 50 kΩ or higher.