公开(公告)号：US11675456B2

公开(公告)日：2023-06-13

申请号：US17833954

申请日：2022-06-07

Applicant: Japan Display Inc.

Inventor： Hayato Kurasawa ,  Hiroshi Mizuhashi ,  Fumitaka Gotoh ,  Gen Koide ,  Tadayoshi Katsuta

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/046

CPC classification number: G06F3/04166 ,  G06F3/046 ,  G06F3/0412 ,  G06F3/0446 ,  G06F2203/04111

Abstract: According to an aspect, a display apparatus includes: a substrate; a plurality of pixel electrodes; a plurality of detection electrodes arranged in a matrix in a display area of the substrate; a plurality of detection electrode lines coupled to the respective detection electrodes; a plurality of first electrodes provided in the same layer as the detection electrodes or the detection electrode lines and extending in a first direction; a plurality of switching elements coupled to the respective pixel electrodes; a plurality of signal lines coupled to the switching elements and extending in a second direction crossing the first direction; a coupling member provided in a peripheral area outside the display area and configured to couple ends of the first electrodes to each other; and a drive circuit configured to output a first drive signal in a first sensing period in which an electromagnetic induction method is used.

公开(公告)号：US20210173245A1

公开(公告)日：2021-06-10

申请号：US17181038

申请日：2021-02-22

Applicant: Japan Display Inc.

Inventor： Hayato Kurasawa ,  Hiroshi Mizuhashi ,  Fumitaka Gotoh ,  Gen Koide ,  Tadayoshi Katsuta

IPC: G02F1/1368 ,  G02F1/1362 ,  G02F1/1333 ,  G06F3/046

Abstract: According to an aspect, a display apparatus includes: a substrate; a plurality of pixel electrodes provided in a display area; a plurality of switching elements coupled to the respective pixel electrodes; a plurality of first electrodes provided between semiconductors of the switching elements and the substrate in a direction orthogonal to the substrate and extending in a first direction; a plurality of signal lines coupled to the switching elements and extending in a second direction intersecting the first direction; a coupling member provided in a peripheral area outside the display area and configured to couple ends of the first electrodes to each other; and a drive circuit configured to output a first drive signal to the first electrodes or the signal lines during a first sensing period in which an electromagnetic induction method is used.

公开(公告)号：US10996783B2

公开(公告)日：2021-05-04

申请号：US16815806

申请日：2020-03-11

Applicant: Japan Display Inc.

Inventor： Takeya Takeuchi ,  Hiroshi Mizuhashi ,  Tadayoshi Katsuta ,  Takehiro Shima

IPC: G06F3/041 ,  G06F3/044 ,  G02F1/1333 ,  G09G3/36

Abstract: A display device with a touch sensor is provided and includes a substrate; pixel electrodes on the substrate; thin film transistors (TFTs) coupled to the pixel electrodes; touch sensor electrodes arranged opposite to the pixel electrodes; a gate buffer coupled to the TFTs; a first switch coupled to the gate buffer; first-L and first-H lines coupled to the first switch; a second line coupled to the gate buffer; and a drive control circuit applying a drive signal to the touch sensor electrodes, wherein a signal supplied to the TFTs is one of a pulse wave signal and a signal in which different three potentials are switched at given timings, wherein three potentials include a first potential supplied through the first-L line, a second potential supplied through the second line, and a third potential supplied through first-H line, wherein the first switch switches to couple the gate buffer with first-L line and first-H line in synchronization with the drive signal in which a first and second common potential are repeated, such that the TFT circuits are supplied with the pulse wave signal in which first and third potential are repeated, and wherein the third potential is greater than the first potential and less than the second potential.

公开(公告)号：US10989952B2

公开(公告)日：2021-04-27

申请号：US16519262

申请日：2019-07-23

Applicant: Japan Display Inc.

Inventor： Tadayoshi Katsuta

IPC: G02F1/1345 ,  G02F1/1335 ,  H01L27/32 ,  G02F1/1362

Abstract: A display device includes a display region, a peripheral region outside the display region, a control circuit, driving circuits, a clock line connecting the control circuit to one of the driving circuits and in which a first clock signal is supplied, and another clock line connecting the control circuit to the other of the driving circuits and in which a second clock signal is supplied. A light shielding layer includes extension portions each extending along a Y direction, and bent portions between the extension portions. A length of one of the extension portions is longer than a length of the other of the extension portions. In plan view, one of the bent portions overlaps with one of the clock lines, and the other of the bent portions is located between termination portions of the clock lines.

公开(公告)号：US10955953B2

公开(公告)日：2021-03-23

申请号：US16859281

申请日：2020-04-27

Applicant: Japan Display Inc.

Inventor： Hiroshi Mizuhashi ,  Yasuyuki Teranishi ,  Toshiaki Fukushima ,  Daisuke Ito ,  Gen Koide ,  Tadayoshi Katsuta

IPC: G06F3/041 ,  G09G3/36 ,  G06F3/044 ,  G02F1/133 ,  G02F1/1343 ,  G02F1/1362 ,  G02F1/1368 ,  G02F1/1345 ,  G02F1/1333

Abstract: A liquid crystal display device is provided and includes a liquid crystal element array having pixel electrodes and switching elements arranged in a matrix form; scanning lines arranged in each row of the liquid crystal element array and supply a scanning signal to switching elements; signal lines arranged in each column of the liquid crystal element array and supply an image signal to the pixel electrodes through switching elements; touch electrodes overlapping pixel electrodes and arranged in the column of the liquid crystal element array; signal line drive circuit arranged along one side of the liquid crystal element array parallel to the row of the liquid crystal element array and forms the image signal; first circuit arranged along the other side of the liquid crystal element array parallel to the row of the liquid crystal element array and is connected to the touch electrodes; and second circuit arranged along the one side of the liquid crystal element array and is connected to the touch electrodes, wherein a touch signal is supplied from the second circuit on the one side of the liquid crystal element array and the touch signal is supplied from the first circuit on the other side of the liquid crystal element array.

公开(公告)号：US10884554B2

公开(公告)日：2021-01-05

申请号：US14163094

申请日：2014-01-24

Applicant: Japan Display Inc.

Inventor： Tadayoshi Katsuta ,  Hiroshi Mizuhashi

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

Abstract: According to an aspect, a display device with a touch detection function includes: a display area where a plurality of pixel electrodes are arranged; drive electrodes provided so as to face the pixel electrodes; a control device for performing image display control; a touch detection electrode facing the drive electrodes; a touch detection unit for detecting a position of a proximity object; a wiring arranged in a frame area positioned outside the display area; and a plurality of selection switches for selecting the drive electrodes to be coupled to the wiring based on a selection signal of the control device. The control device supplies the display drive voltage and a touch drive signal to the same wiring at different times.

公开(公告)号：US10824267B2

公开(公告)日：2020-11-03

申请号：US16517086

申请日：2019-07-19

Applicant: Japan Display Inc.

Inventor： Tadayoshi Katsuta

IPC: G06F3/041 ,  G06F3/147 ,  G09G3/36 ,  G06F3/044 ,  G06F3/046

Abstract: An input detection device includes a plurality of drive electrodes, a first wiring that supplies a first voltage to the plurality of drive electrodes, and a second wiring that supplies a second voltage different from the first voltage, to the plurality of drive electrodes. Input detection through an electromagnetic induction method is performed through a magnetic field generated by supplying the first voltage and the second voltage to the plurality of drive electrodes, and the first voltage and the second voltage supplied to the first wiring and the second wiring are direct-current voltages.

公开(公告)号：US10684712B2

公开(公告)日：2020-06-16

申请号：US15407511

申请日：2017-01-17

Applicant: Japan Display Inc.

Inventor： Tadayoshi Katsuta ,  Toshiaki Fukushima ,  Naoyuki Obinata ,  Gen Koide

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

Abstract: A display apparatus includes a first pad electrically connected to the drive circuit, a voltage supply line having one end electrically connected to the first pad, a common wire electrically connected to the voltage supply line and the second electrode, a transistor formed between the voltage supply line and the common wire, and a branch wire being a part of the voltage supply line, extending from a branch section, and electrically connected to the first pad. Then, the branch section is located closer to a center of the insulating substrate than the first pad in a plan view.

公开(公告)号：US10606431B2

公开(公告)日：2020-03-31

申请号：US16518645

申请日：2019-07-22

Applicant: Japan Display Inc.

Inventor： Takeya Takeuchi ,  Hiroshi Mizuhashi ,  Tadayoshi Katsuta ,  Takehiro Shima

IPC: G06F3/041 ,  G06F3/044 ,  G02F1/1333 ,  G09G3/36

Abstract: A display device with a touch sensor includes: plural display pixel electrodes; a common electrode arranged opposite to the display pixel electrodes; a display function layer having an image display function; a display control circuit performing image display control so as to fulfill the display function of the display function layer by applying a voltage for display between the display pixel electrodes and the common electrode based on an image signal; and a touch detection electrode provided opposite to the common electrode and forming capacitance between the touch detection electrode and the common electrode, wherein a drive voltage for display applied to the common electrode by the display control circuit is used as a drive signal for the touch sensor, and a gate potential of TFT circuits included in the display pixel electrodes is increased during a period when the drive signal for the touch sensor is applied.

公开(公告)号：US10572050B2

公开(公告)日：2020-02-25

申请号：US16149190

申请日：2018-10-02

Applicant: Japan Display Inc.

Inventor： Hiroshi Mizuhashi ,  Tadayoshi Katsuta ,  Gen Koide ,  Toshiaki Fukushima

IPC: G06F3/041 ,  G09G3/36 ,  G06F3/044

Abstract: According to one embodiment, a display device includes first and second substrate units, a display function layer, and a drive element. The first substrate unit includes a first substrate, a display unit, and a circuit unit. The first substrate has a first surface including a display region and a peripheral region. The display unit is provided in the display region, and includes first lines, second lines, switch elements, pixel electrodes, and third lines. The circuit unit is provided in the peripheral region, and is electrically connected to one of the second lines and one of the third lines. The second substrate unit includes a second substrate and fourth lines. The display function layer is provided between the first and second substrate units. The drive element is provided on the peripheral region. At least a portion of the circuit unit is disposed between the drive element and the first substrate.