公开(公告)号：US20210096684A1

公开(公告)日：2021-04-01

申请号：US16882740

申请日：2020-05-25

Applicant: Novatek Microelectronics Corp.

Inventor： Yen-Cheng Cheng

IPC: G06F3/041 ,  G06F3/044

Abstract: A driver chip including a receiving structure, a shielding structure, and a touch control circuit is provided. The receiving structure can receive a touch sensing signal. The shielding structure can be disposed aside the receiving structure. The shielding structure can shield at least one parasitic capacitor coupled to the receiving structure. The touch control circuit can be connected to the receiving structure and configured to receive the touch sensing signal. An electronic device including a driver chip is also provided.

公开(公告)号：US20210048913A1

公开(公告)日：2021-02-18

申请号：US16992140

申请日：2020-08-13

Applicant: Novatek Microelectronics Corp.

Inventor： Yen-Cheng Cheng

IPC: G06F3/041

Abstract: A touch analog front-end circuit includes a current conveyor and an accumulator. The current conveyor receives a first voltage as an operation voltage, and generates a current signal according to a touch sensing signal received from a touch display panel. The accumulator is coupled to the current conveyor, receives a second voltage as an operation voltage, and generates an accumulating result according to the current signal and a reference voltage. The first voltage is higher than the second voltage.

公开(公告)号：US20210020135A1

公开(公告)日：2021-01-21

申请号：US16513723

申请日：2019-07-17

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hsiu-Hui Yang ,  Yen-Cheng Cheng ,  Chin-Hung Hsu

IPC: G09G3/36 ,  G11C7/10

Abstract: An output circuit of a driver includes a plurality of output nodes, a first output buffer group and a multiplexer. The first output buffer group is configured to output data to the plurality of output nodes, wherein each output buffer in the first output buffer group is configured to output data to at least two output nodes among the plurality of output nodes. The multiplexer, coupled between the plurality of output nodes and the first output buffer group, is configured to select to couple each output buffer in the first output buffer group to one of the plurality of output nodes.

公开(公告)号：US20200028508A1

公开(公告)日：2020-01-23

申请号：US16293613

申请日：2019-03-05

Applicant: Novatek Microelectronics Corp.

Inventor： Yen-Cheng Cheng ,  Kuang-Feng Sung

IPC: H03K17/687 ,  G09G5/00

Abstract: A channel circuit of source driver and an operation method thereof are provided. The channel circuit includes a digital-to-analog converter (DAC), a first switch, an output buffer circuit and a pre-charge circuit. The terminals of the first switch are coupled to the first output terminal of the DAC and the first input terminal of the output buffer circuit, respectively. The pre-charge circuit is coupled to the first input terminal of the output buffer circuit. The pre-charge circuit pre-charges the first input terminal of the output buffer circuit when the first switch is turned off during a pre-charge period, and not to pre-charge the first input terminal of the output buffer circuit when the first switch is turned on during a normal operation period.