公开(公告)号：US20220229515A1

公开(公告)日：2022-07-21

申请号：US17577492

申请日：2022-01-18

Applicant: Japan Display Inc.

Inventor： Akihiko FUJISAWA ,  Kaoru ITO ,  Daichi ABE

IPC: G06F3/044 ,  G06F3/041

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：US20220171516A1

公开(公告)日：2022-06-02

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

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：US20220057872A1

公开(公告)日：2022-02-24

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 ,  G02F1/1333 ,  G04G21/08

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.