公开(公告)号：US12287935B2

公开(公告)日：2025-04-29

申请号：US18639005

申请日：2024-04-18

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Choon Hyop Lee ,  Jang Hui Kim ,  Jae Won Kim ,  In Nam Lee

IPC: G06F3/041 ,  G06F3/044 ,  G09G3/32

Abstract: A touch sensor including: a touch sensing area including driving electrodes and sensing electrodes; a driving signal generator which determines phases of driving signals based on a reference code and supplies the driving signals to the sensing electrodes, wherein the driving signals are sine waves; and a touch processor which receives sensing signals according to the driving signals from the sensing electrodes and determines a touch position based on the sensing signals and the reference code, wherein the driving signal generator controls the phases of the driving signals by updating the reference code at a predetermined time point.

公开(公告)号：US11903296B2

公开(公告)日：2024-02-13

申请号：US17985913

申请日：2022-11-14

Applicant: Samsung Display Co., Ltd.

Inventor： In Nam Lee ,  Jang Hui Kim ,  Choon Hyop Lee

IPC: H10K59/40 ,  G06F3/041 ,  G06F3/044 ,  H10K50/844

CPC classification number: H10K59/40 ,  G06F3/0412 ,  G06F3/0443 ,  G06F3/04184 ,  H10K50/844 ,  G06F2203/04112

Abstract: A display device including a display panel including pixels that emit light on a frame basis. An input sensing unit includes driving electrodes and sensing electrodes. A driving signal generator is configured to provide driving signals to the driving electrodes. Analog front-ends are configured to receive sensing signals depending on the driving signals from the sensing electrodes. A signal processor is configured to detect touch input, based on differential output values of the analog front-ends. The driving signal generator provides the driving signals to the driving electrodes while avoiding a period in which a pulse of a vertical synchronization signal defining start of the frame is generated.

公开(公告)号：US11899878B2

公开(公告)日：2024-02-13

申请号：US18148253

申请日：2022-12-29

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Choon Hyop Lee ,  Jang Hui Kim ,  Jae Won Kim ,  In Nam Lee

IPC: G06F3/041 ,  G06F3/044 ,  H03M1/18

CPC classification number: G06F3/04166 ,  G06F3/044 ,  G06F3/04164 ,  H03M1/18

Abstract: An input sensing device includes driving electrodes and sensing electrodes, and an analog front-end which processes sensing signals from the sensing electrodes to output a differential output value. The analog front-end includes a first charge amplifier which differentially amplifies first and second sensing signals from two sensing electrodes to first and second input terminals, thus outputting first and second differential signals through first and second output terminals, a second charge amplifier which differentially amplifies the first and second differential signals, thus outputting third and fourth differential signals, a first demodulation circuit which filters the first and second differential signals in a first mode and filters each of the third and fourth differential signals in a second mode, and a first analog-to-digital converter which outputs a first sensing value based on at least one output signal of the first demodulation circuit.

公开(公告)号：US11067723B2

公开(公告)日：2021-07-20

申请号：US16743941

申请日：2020-01-15

Applicant: Samsung Display Co., Ltd.

Inventor： In Nam Lee ,  Young Seok Yoo ,  Kang Won Lee ,  Hyun Jae Lee ,  Seung Hwan Chung

IPC: G06F3/044 ,  G02B1/14 ,  G02F1/1333 ,  G06F3/041

Abstract: An optical touch film includes a sensor layer, an optical film, an adhesive layer, a separation layer, and a refractive insulating layer. The sensor layer includes touch electrodes forming a sensor. The adhesive layer is between the sensor layer and the optical film. The separation layer is on a surface of the sensor layer. The separation layer includes an organic polymer material. The refractive insulating layer is on the touch electrodes. A refractive index of the refractive insulating layer is greater than a refractive index of the separation layer.

公开(公告)号：US10928941B2

公开(公告)日：2021-02-23

申请号：US16299280

申请日：2019-03-12

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： In Nam Lee ,  Young Sik Kim ,  Hyun Jae Lee ,  Mi Young Kim ,  Sung Hwan Kim ,  Chang Bum Kim ,  Hyung Chul Kim

IPC: G06F3/041 ,  G06F3/044 ,  G01L1/14 ,  G01L1/22

Abstract: An input sensing device includes a first base layer, a plurality of first sensing electrodes, a plurality of second sensing electrodes, a plurality of third sensing electrodes, and a plurality of fourth sensing electrodes. The first sensing electrodes are arranged on the first base layer along a first direction. The second sensing electrodes are arranged on the first base layer in different rows from the first sensing electrodes. The third sensing electrodes are arranged on the second sensing electrodes along a second direction different from the first direction. The third sensing electrodes overlap the second sensing electrodes. The fourth sensing electrodes are arranged on the same layer as the third sensing electrodes and overlap the first sensing electrodes. A constant voltage is applied to the third sensing electrodes during a touch pressure sensing operation.

公开(公告)号：US10572080B2

公开(公告)日：2020-02-25

申请号：US15619840

申请日：2017-06-12

Applicant: Samsung Display Co., Ltd.

Inventor： In Nam Lee ,  Young Seok Yoo ,  Kang Won Lee ,  Hyun Jae Lee ,  Seung Hwan Chung

IPC: G06F3/044 ,  G06F3/041 ,  G02B1/14 ,  G02F1/1333

Abstract: An optical touch film includes a sensor layer, an optical film, an adhesive layer, a separation layer, and a refractive insulating layer. The sensor layer includes touch electrodes forming a sensor. The adhesive layer is between the sensor layer and the optical film. The separation layer is on a surface of the sensor layer. The separation layer includes an organic polymer material. The refractive insulating layer is on the touch electrodes. A refractive index of the refractive insulating layer is greater than a refractive index of the separation layer.

公开(公告)号：US10268241B2

公开(公告)日：2019-04-23

申请号：US15434534

申请日：2017-02-16

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Kang Won Lee ,  Hee Woong Park ,  Young Seok Yoo ,  Jeong Heon Lee ,  Choon Hyop Lee ,  In Nam Lee ,  Hyun Jae Lee

IPC: G06F3/041 ,  G06F1/16

Abstract: A touch screen panel including a display panel; a first flexible circuit board including a first end connected to the display panel, the first flexible circuit board having at least one first opening; a touch panel disposed on the display panel and the first flexible circuit board; and a second flexible circuit board including a first end connected to the touch panel, the second flexible circuit board having at least one second opening corresponding to the at least one first opening.

公开(公告)号：US11983360B2

公开(公告)日：2024-05-14

申请号：US17708188

申请日：2022-03-30

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Choon Hyop Lee ,  Jang Hui Kim ,  Jae Won Kim ,  In Nam Lee

IPC: G06F3/041 ,  G06F3/044 ,  G09G3/32

CPC classification number: G06F3/04166 ,  G06F3/0418 ,  G06F3/0446 ,  G09G3/32

Abstract: A touch sensor including: a touch sensing area including driving electrodes and sensing electrodes; a driving signal generator which determines phases of driving signals based on a reference code and supplies the driving signals to the sensing electrodes, wherein the driving signals are sine waves; and a touch processor which receives sensing signals according to the driving signals from the sensing electrodes and determines a touch position based on the sensing signals and the reference code, wherein the driving signal generator controls the phases of the driving signals by updating the reference code at a predetermined time point.

公开(公告)号：US11543914B2

公开(公告)日：2023-01-03

申请号：US17711594

申请日：2022-04-01

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Choon Hyop Lee ,  Jang Hui Kim ,  Jae Won Kim ,  In Nam Lee

IPC: G06F3/041 ,  G06F3/044 ,  H03M1/18

Abstract: An input sensing device includes driving electrodes and sensing electrodes, and an analog front-end which processes sensing signals from the sensing electrodes to output a differential output value. The analog front-end includes a first charge amplifier which differentially amplifies first and second sensing signals from two sensing electrodes to first and second input terminals, thus outputting first and second differential signals through first and second output terminals, a second charge amplifier which differentially amplifies the first and second differential signals, thus outputting third and fourth differential signals, a first demodulation circuit which filters the first and second differential signals in a first mode and filters each of the third and fourth differential signals in a second mode, and a first analog-to-digital converter which outputs a first sensing value based on at least one output signal of the first demodulation circuit.

公开(公告)号：US11301074B2

公开(公告)日：2022-04-12

申请号：US17151765

申请日：2021-01-19

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： In Nam Lee ,  Young Sik Kim ,  Hyun Jae Lee ,  Mi Young Kim ,  Sung Hwan Kim ,  Chang Bum Kim ,  Hyung Chul Kim

IPC: G06F3/041 ,  G06F3/044 ,  G01L1/14 ,  G01L1/22

Abstract: An input sensing device includes a first base layer, a plurality of first sensing electrodes, a plurality of second sensing electrodes, a plurality of third sensing electrodes, and a plurality of fourth sensing electrodes. The first sensing electrodes are arranged on the first base layer along a first direction. The second sensing electrodes are arranged on the first base layer in different rows from the first sensing electrodes. The third sensing electrodes are arranged on the second sensing electrodes along a second direction different from the first direction. The third sensing electrodes overlap the second sensing electrodes. The fourth sensing electrodes are arranged on the same layer as the third sensing electrodes and overlap the first sensing electrodes. A constant voltage is applied to the third sensing electrodes during a touch pressure sensing operation.