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公开(公告)号：US20240176450A1
公开(公告)日：2024-05-30
申请号：US18432158
申请日：2024-02-05
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： JI WOONG KIM , Moon Jae Jeong , Hyung Gun Ma , Tae Hun Lee , Keum Dong Jung , Sang Hyun Heo
CPC classification number: G06F3/04182 , G06F3/0446 , G06F3/0447
Abstract: An input sensing device includes first driving electrodes, second driving electrodes, and sensing electrodes, and a sensing driver that transmits a first driving signal to the first driving electrodes at a first frequency, transmits a second driving signal to the second driving electrodes at a second frequency, and determines a touch or approach of an external object based on sensing signals received from the sensing electrodes. The sensing driver includes analog front-end circuits that separate a sensing signal of the first frequency and a sensing signal of the second frequency that are received from the respective sensing electrodes, and generate digital sensing data based on a result of a recombination of the separated sensing signals.
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公开(公告)号：US11893186B2
公开(公告)日：2024-02-06
申请号：US18176440
申请日：2023-02-28
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Ji Woong Kim , Moon Jae Jeong , Hyung Gun Ma , Tae Hun Lee , Keum Dong Jung , Sang Hyun Heo
CPC classification number: G06F3/04182 , G06F3/0446 , G06F3/0447
Abstract: An input sensing device includes first driving electrodes, second driving electrodes, and sensing electrodes, and a sensing driver that transmits a first driving signal to the first driving electrodes at a first frequency, transmits a second driving signal to the second driving electrodes at a second frequency, and determines a touch or approach of an external object based on sensing signals received from the sensing electrodes. The sensing driver includes analog front-end circuits that separate a sensing signal of the first frequency and a sensing signal of the second frequency that are received from the respective sensing electrodes, and generate digital sensing data based on a result of a recombination of the separated sensing signals.
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公开(公告)号：US11735103B2
公开(公告)日：2023-08-22
申请号：US17721465
申请日：2022-04-15
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Kyung Tea Park , Ji Woong Kim , Hyung Gun Ma , Seong An Park , Seong Joo Lee , Tae Hun Lee , Sang Hyun Heo
CPC classification number: G09G3/32 , H03F3/70 , G09G2310/0291 , G09G2310/0297
Abstract: An analog front-end includes a (1-1)-th charge amplifier configured to differentially amplify a first and second sensing signals provided to a (1-1)-th input terminal and a (1-2)-th input terminal, respectively, and output a (1-1)-th differential signal. A (1-2)-th charge amplifier is configured to differentially amplify the second sensing signal and a third sensing signal provided to a (1-3)-th input terminal and a (1-4)-th input terminal, respectively, and output a (1-2)-th differential signal. A second charge amplifier is configured to differentially amplify the (1-1)-th differential signal and the (1-2)-th differential signal provided to a (2-1)-th input terminal and a (2-2)-th input terminal, respectively, and output a (2-1)-th differential signal and a (2-2)-th differential signal. A demodulation circuit is configured to filter the (2-1)-th differential signal and the (2-2)-th differential signal and output demodulated differential signals. An analog-to-digital converter is configured to output a sensing value based on the demodulated differential signals.
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公开(公告)号：US20240004499A1
公开(公告)日：2024-01-04
申请号：US18176440
申请日：2023-02-28
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： JI WOONG KIM , Moon Jae Jeong , Hyung Gun Ma , Tae Hun Lee , Keum Dong Jung , Sang Hyun Heo
CPC classification number: G06F3/04182 , G06F3/0446 , G06F3/0447
Abstract: An input sensing device includes first driving electrodes, second driving electrodes, and sensing electrodes, and a sensing driver that transmits a first driving signal to the first driving electrodes at a first frequency, transmits a second driving signal to the second driving electrodes at a second frequency, and determines a touch or approach of an external object based on sensing signals received from the sensing electrodes. The sensing driver includes analog front-end circuits that separate a sensing signal of the first frequency and a sensing signal of the second frequency that are received from the respective sensing electrodes, and generate digital sensing data based on a result of a recombination of the separated sensing signals.
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