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公开(公告)号：US20200343892A1
公开(公告)日：2020-10-29
申请号：US16583220
申请日：2019-09-25
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hsin-Hong Yang , Yen-Cheng Cheng
IPC: H03K19/0185 , H03F3/45 , H03K17/687 , H03F1/02
Abstract: An output stage circuit includes a first operational amplifier, a second operational amplifier, a switch circuit, a clamp circuit and at least one pull-low transistor. The first operational amplifier is operated in a first voltage domain. The second operational amplifier is operated in a second voltage domain. The switch circuit is coupled to the first operational amplifier and the second operational amplifier. The clamp circuit is coupled between the switch circuit and a plurality of output terminals of the output stage circuit. The at least one pull-low transistor is coupled to the switch circuit.
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公开(公告)号：US20200342801A1
公开(公告)日：2020-10-29
申请号：US16395247
申请日：2019-04-26
Applicant: NOVATEK Microelectronics Corp.
Inventor： Yen-Tao Liao , Hung-Hsiang Chen , Jen-Ta Yang , Yi-Wei Lin , Huang-Chin Tang
IPC: G09G3/20
Abstract: The present invention discloses a driving method for a source driver, for driving a source line of a display panel. The driving method includes the steps of: driving the source line with a first voltage or a second voltage smaller than the first voltage in a first driving cycle; driving the source line with the first voltage in a second driving cycle next to the first driving cycle when the source line is driven with the first voltage in the first driving cycle; and driving the source line with an overdrive voltage in the second driving cycle when the source line is driven with the second voltage in the first driving cycle. The first voltage is a normal high voltage of the display panel, and the overdrive voltage is greater than the normal high voltage.
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563.发明申请公开(公告)号：US20200342196A1
公开(公告)日：2020-10-29
申请号：US16907176
申请日：2020-06-20
Applicant: NOVATEK Microelectronics Corp.
Inventor： Tsen-Wei Chang , Chih-Peng Hsia , Wei-Lun Shih , Hong-Chu Chen , Su-Wei Lien , Sheng-Wen Hsiao , Liang-Chi Cheng
Abstract: The present invention provides a control method for an optical fingerprint sensor. The optical fingerprint sensor includes a plurality of pixels, and each of the pixels has a first control signal line and a second control signal line. Each of the pixels is further coupled to a first voltage source line, a second voltage source line and a sensing line. The control method includes a plurality of steps, and the steps are applying a first anti-loading driving (ALD) signal on the second control signal line, and applying a second ALD signal on at least one of the first control signal line, the first voltage source line, the second voltage source line and the sensing line.
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公开(公告)号：US10812756B2
公开(公告)日：2020-10-20
申请号：US16278759
申请日：2019-02-19
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Jen-Huan Hu
IPC: H04N7/14 , H04N19/513 , H04N19/577 , H04N5/00 , H04N7/00 , H04N7/01 , H04N5/14
Abstract: A movement detection circuit, a motion estimation circuit and associated movement detection method are provided. The movement detection circuit includes a candidate searching module including a first-frame and a second-frame candidate circuits, an object selection module including a first selection circuit, a second selection circuit, and a motion vector calculation circuit. The first-frame and the second-frame candidate circuits respectively locate a first and a second first-frame candidate positions in the first frame and locates a first and a second second-frame candidate positions in the second frame. The first-frame object selection circuit identifies one of the first and the second first-frame candidate positions as a first-frame object position, and the second-frame object selection circuit identifies one of the first and the second second-frame candidate positions as a second-frame object position. An object motion vector representing movement of an object based on the first-frame and the second-frame object positions is calculated.
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公开(公告)号：US20200329244A1
公开(公告)日：2020-10-15
申请号：US16384907
申请日：2019-04-15
Applicant: NOVATEK Microelectronics Corp.
Inventor： Fandi Jou
IPC: H04N19/126 , H04N19/139 , H04N19/89 , H04N19/189 , H04N19/176
Abstract: A method of determining quantization parameters includes the steps of: receiving a block of image data; calculating a general variance of the block of image data; calculating a plane-based variance of the block of image data by subtracting an image moment of the block of image data from the general variance; and determining a quantization parameter for the block of image data according to the plane-based variance.
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Patent Agency Ranking
公开(公告)号：US10804865B1
公开(公告)日：2020-10-13
申请号：US16729495
申请日：2019-12-30
Applicant: NOVATEK Microelectronics Corp.
Inventor： Chieh-An Lin , Yen-Ru Kuo , Jhih-Siou Cheng , Ju-Lin Huang
Abstract: A current integrator includes an operational amplifier, an integration capacitor and an offset cancelation capacitor. The operational amplifier includes a first input stage and a second input stage. The first input stage is coupled to an input terminal of the current integrator. The integration capacitor is coupled between the first input stage of the operational amplifier and an output terminal of the current integrator. The offset cancelation capacitor is coupled to the second input stage of the operational amplifier.
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公开(公告)号：US20200312208A1
公开(公告)日：2020-10-01
申请号：US16365711
申请日：2019-03-27
Applicant: Novatek Microelectronics Corp.
Inventor： Jen-Wei Li , Jen-Hao Liao
IPC: G09G3/20
Abstract: A display driver that includes a first driver integrated circuit being cascaded to a second driver integrated circuit is introduced. The first driver integrated circuit includes a first gamma voltage generator that is configured to output a plurality of first gamma voltages to output terminals of the first gamma voltage generator. The second driver integrated circuit includes a second gamma voltage generator that is configured to output a plurality of second gamma voltages to output terminals of the second gamma voltage generator. Each of the output terminals of the first gamma voltage generator is corresponded to one of the output terminals of the gamma voltage generator. At least one of the output terminals of the first gamma voltage generator is electrically coupled to the corresponding one of the output terminals of the second gamma voltage generator to output at least one common gamma voltage of the first gamma voltages and the second gamma voltages. A method adapted to the display driver is also introduced.
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公开(公告)号：US10791266B1
公开(公告)日：2020-09-29
申请号：US16449436
申请日：2019-06-23
Applicant: NOVATEK Microelectronics Corp.
Inventor： Yun-Shu Yang , Yen-Tao Liao
Abstract: The image processing circuit includes a receiving circuit, configured to receive a plurality of pixels of a video frame, wherein the plurality of pixels are corresponding to a plurality of pixel locations, a pixel location of a pixel is corresponding to a gamma category value, and the gamma category value is either a gamma-high value or a gamma-low value; and a gamma table circuit, configured to obtain a gamma table; and a compensation circuit, configured to generate an output pixel value; wherein a plurality of first pixel locations are corresponding to a plurality of gamma-high tables, and the plurality of gamma-high tables are mutually different; wherein a plurality of second pixel locations are corresponding to a plurality of gamma-low tables, and the plurality of gamma-low tables are mutually different.
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公开(公告)号：US10790826B1
公开(公告)日：2020-09-29
申请号：US16416261
申请日：2019-05-19
Applicant: NOVATEK Microelectronics Corp.
Inventor： Hsiang-Yi Chiu
IPC: H03K3/012 , H03K19/0175 , H03K19/0185 , H03K3/037
Abstract: A level shifter is disclosed. The level shifter comprises a pulse generating circuit, configured to receive an input signal, and generate a plurality of first-level pulses having a pulse width shorter than a pulse width of the input signal, wherein the input signal swings over a first voltage domain; a pulse transforming circuit, coupled to the pulse generating circuit, configured to generate a plurality of second-level pulses corresponding to the plurality of first-level pulses; and a latching circuit, coupled to the pulse transforming circuit, configured to generate an output signal by latching a status of the output signal in response to the plurality of second-level pulses, wherein the output signal swings over a second voltage domain.
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公开(公告)号：US10789895B2
公开(公告)日：2020-09-29
申请号：US16009290
申请日：2018-06-15
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Chih-Hsien Chou , Po-Yu Tseng , Jhih-Siou Cheng
IPC: G09G3/36 , G09G3/3283 , H03F3/45
Abstract: The differential difference amplifier circuit includes a differential input stage circuit, a loading stage circuit coupled to the differential input stage circuit, and an output stage circuit coupled to the loading stage circuit. The output stage circuit is configured to generate an output signal. The differential input stage circuit includes a first differential pair having a first transconductance and a second differential pair having a second transconductance. The first differential pair is biased by a first current source and receives a first input signal and the output signal. The second differential pair is biased by a second current source and receives a second input signal and the output signal. At least one of the first transconductance and the second transconductance is adjusted according to the image data.
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