公开(公告)号：US20210050830A1

公开(公告)日：2021-02-18

申请号：US16935174

申请日：2020-07-21

Applicant: NOVATEK Microelectronics Corp.

Inventor： Ying-Hsiang Wang ,  Tsung-Hau Chang ,  Jung-Hsing Liao

IPC: H03F3/45

Abstract: An operational amplifier includes a first differential input pair, a first switch and a second switch. The first differential input pair includes a first input transistor and a second input transistor. The first input transistor has a gate terminal coupled to an output terminal of the operational amplifier. The second input transistor has a gate terminal. The first switch is coupled between the gate terminal of the first input transistor and the gate terminal of the second input transistor. The second switch is coupled between a first input terminal of the operational amplifier and the gate terminal of the second input transistor.

公开(公告)号：US20210043153A1

公开(公告)日：2021-02-11

申请号：US16547586

申请日：2019-08-22

Applicant: NOVATEK Microelectronics Corp.

Inventor： Yun-Shu Yang ,  Yen-Tao Liao ,  Hongchun Cong

IPC: G09G3/36

Abstract: A method of gray level adjustment for an image data generator includes receiving a plurality of image frames including a first image frame and a second image frame next to the first image frame, wherein the first image frame includes a first input subpixel data corresponding to a first subpixel of a display panel and the second image frame includes a second input subpixel data corresponding to the first subpixel; with respect to the first input subpixel data, outputting a first gray level data of a first gamma lookup table as a first output subpixel data; and with respect to the second input subpixel data, outputting a second gray level data of a second gamma lookup table as a second output subpixel data. The first output subpixel data and the second output subpixel data are corresponding to the first subpixel of the display panel.

公开(公告)号：US20210034189A1

公开(公告)日：2021-02-04

申请号：US16944157

申请日：2020-07-31

Applicant: Novatek Microelectronics Corp.

Inventor： Huan-Teng Cheng ,  Wei-Lun Shih ,  Huang-Chin Tang

IPC: G06F3/041 ,  G06K9/00

Abstract: An electronic circuit is adapted to drive a display panel having touch sensors and fingerprint sensors. The electronic circuit includes a first circuit, a second circuit, a first switch circuit and a control circuit. The first circuit processes touch sensing signals from the touch sensors. The second circuit processes fingerprint sensing signals corresponding to a fingerprint from the fingerprint sensors. The first switch circuit includes a plurality of first terminals coupled to the first circuit and the second circuit and a plurality of second terminals configurable to be coupled to the display panel. The first switch circuit couples a part of the first terminals to the second terminals in a first time interval and couples the other part of the first terminals to the second terminals in a second time interval. The touch sensing signals and the fingerprint sensing signals are inputted to the electronic circuit through the second terminals.

公开(公告)号：US10904578B2

公开(公告)日：2021-01-26

申请号：US16726266

申请日：2019-12-24

Applicant: Novatek Microelectronics Corp.

Inventor： Yu-Wei Chang ,  Po-Chin Hu

IPC: H04N19/85 ,  H04N19/88 ,  H04N19/423

Abstract: A video processing apparatus and a video processing circuit of the video processing apparatus are provided. The video processing circuit includes a video processor, a first memory controller, a second memory controller and a distributor. The video processor includes at least one sub-processing-tasks processor which is configured to execute one or more sub-processing tasks respectively. The first memory controller controls a first memory. The second memory controller controls a second memory. The distributor stores the data outputted by the video processor to the first memory and the second memory through the first memory controller and the second memory controller respectively.

公开(公告)号：US10902791B2

公开(公告)日：2021-01-26

申请号：US16522661

申请日：2019-07-26

Applicant: NOVATEK Microelectronics Corp.

Inventor： Chia-Hsin Tung ,  Chun-Hung Chen

IPC: G09G3/3275

Abstract: A method of controlling a source driver includes the steps of: detecting a line of image data to be outputted by a plurality of channels of the source driver, to generate a detection result; generating a plurality of control signals according to the detection result, each of the plurality of control signals corresponding to a channel among the plurality of channels; and enabling or disabling an operational amplifier in each of the plurality of channels via one of the plurality of control signals corresponding to the channel.

公开(公告)号：US10902767B1

公开(公告)日：2021-01-26

申请号：US16726962

申请日：2019-12-26

Applicant: NOVATEK Microelectronics Corp.

Inventor： Tsung-Hau Chang ,  Chi-Wei Liu ,  Ping Chen

IPC: G09G3/20

Abstract: A driving circuit of display apparatus includes an operational amplifier (OP), comprising a plurality of input terminals; a digital-to-analog converter (DAC); a multiplexer, coupled to the OP and the DAC, comprising a plurality of switches; and a boosting module, configured to decrease an equivalent time constant between the DAC and the OP to increase an output slew rate of the OP in a boosting period; wherein the boosting period is enabled before a steady state of the OP.

公开(公告)号：US10887601B1

公开(公告)日：2021-01-05

申请号：US16600563

申请日：2019-10-13

Applicant: Novatek Microelectronics Corp.

Inventor： Jingzhi Zhang ,  Xin Huang

IPC: H04N19/147 ,  H04N19/124 ,  H04N19/19 ,  H04N19/196 ,  H04N19/184 ,  H04N19/149 ,  H04N19/154

Abstract: The disclosure provides a method and an image processing device for video bit-rate control. The method includes the following steps. A designated distortion value and a maximum bit-rate value are received. A Lagrange multiplier and a quantization parameter (QP) of a current frame among a sequence of video frames are estimated according to the designated distortion value and the maximum bit-rate value. The current frame is encoded according to the estimated Lagrange multiplier and the estimated QP.

公开(公告)号：US20200380235A1

公开(公告)日：2020-12-03

申请号：US16424506

申请日：2019-05-29

Applicant: NOVATEK Microelectronics Corp.

Inventor： Jung-Chen CHUNG ,  Chi-Ting CHEN

IPC: G06K9/00 ,  G06K9/20

Abstract: A fingerprint sensing apparatus having a large-area sensing mechanism is provided that includes at least three optical fingerprint sensing circuits and a processing circuit. The at least three optical fingerprint sensing circuits are configured to perform sensing within a plurality of sensing areas to obtain a plurality of sensed images, wherein each of the sensing areas corresponds to one of the optical fingerprint sensing circuits. The processing circuit is electrically coupled to the optical fingerprint sensing circuits to receive the sensed images and is configured to splice the sensed images together to form an integrated sensed image.

公开(公告)号：US10855931B1

公开(公告)日：2020-12-01

申请号：US16677570

申请日：2019-11-07

Applicant: Novatek Microelectronics Corp.

Inventor： Chi-Fan Liou ,  Wei Hsu

IPC: H04N5/235

Abstract: A high dynamic range image sensing method for an image sensing device is provided. The high dynamic range image sensing method comprises: calculating a brightness sum value of a pixel block to obtain a long exposure value; calculating a brightness average value of the pixel block to obtain a short exposure value; calculating a block average value of a plurality of adjacent pixel blocks; obtaining a weight value according to the block average value; and outputting a high dynamic range pixel value of one pixel according to the long exposure value, the short exposure value and the weight value.

公开(公告)号：US20200373893A1

公开(公告)日：2020-11-26

申请号：US16421538

申请日：2019-05-24

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： De-Shiou TSENG

IPC: H03F3/45 ,  H03G3/30 ,  H03G1/00

Abstract: An output stage circuit of an operational amplifier, the operational amplifier, and a signal amplifying method applied to the operational amplifier are provided. The output stage circuit includes an inverting circuit and a compensation module. The inverting circuit is electrically connected to a gain stage circuit of the operational amplifier. The inverting circuit generates an output signal of the operational amplifier. The compensation module includes a first compensation circuit, including a first current providing path and a first suppression activation circuit. The first current providing path provides a first compensation current. The first suppression activation circuit conducts the first compensation current to the inverting circuit if a first compensation condition related to a first gain stage signal generated by the gain stage circuit is satisfied. Variation of the output signal is suppressed because of the first compensation current.