公开(公告)号：US11353991B2

公开(公告)日：2022-06-07

申请号：US17313810

申请日：2021-05-06

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Chun-Hung Chen ,  Kai-Wen Shao ,  Feng-Lin Chan ,  Shuo-Wen Jang

IPC: G06F3/041 ,  G09G3/3233 ,  G06F3/044 ,  G09G3/3208

Abstract: The disclosure provides a method for driving an OLED touch-and-display device, a driving circuit, and an OLED touch-and-display device. The method includes: generating gate driving signals that are sequentially shifted based on the first clock signal (GCK); sequentially applying the gate driving signals that are sequentially shifted to the plurality of GLs; writing display data in a display driving period for each row of pixels, to the row of pixels, wherein a time length of the display driving period depends on a corresponding gate driving signal and is smaller than the clock cycle; and for a display driving period for each of at least one row of pixels, setting a touch detection period corresponding to the display driving period or corresponding to the display driving period for previous row of pixels at least partially overlapping with the display driving period in time.

公开(公告)号：US20210373738A1

公开(公告)日：2021-12-02

申请号：US17330058

申请日：2021-05-25

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Hung-Kai Chen ,  Yu-Huang Chen ,  Feng-Lin Chan

IPC: G06F3/041 ,  G06F3/044

Abstract: A touch sensing method, apparatus for a touch panel, and electronic device are provided. The method includes: determining a first number of to-sense touch sensing circuits, and determining a second number of reference touch sensing circuits, each to-sense touch sensing circuit having a corresponding reference touch sensing circuit; causing each to-sense touch sensing circuit to receive a touch excitation signal TX1, and apply TX1 to a corresponding touch sensitive cell and receive a touch sensing signal therefrom, and output a first output signal; causing each reference touch sensing circuit to receive a touch reference signal DC/TX2, and apply DC/TX2 to a corresponding touch sensitive cell and receive a reference sensing signal therefrom, wherein DC/TX2 and TX1 are different signals; and obtaining, according to respective first and second output signals, a capacitance difference of capacitances sensed by each to-sense touch sensing circuit and its corresponding reference touch sensing circuit.

公开(公告)号：US20210256236A1

公开(公告)日：2021-08-19

申请号：US16790636

申请日：2020-02-13

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hung-Kai Chen ,  Ting-Hsuan Hung ,  Chih-Yuan Chang ,  Feng-Lin Chan

IPC: G06K9/00

Abstract: A fingerprint detecting system comprises a fingerprint module, for detecting a fingerprint of a user and outputting a current signal according to the detected fingerprint, and a signal processing circuit, coupled to the fingerprint module, for receiving the current signal from the fingerprint module, performing a offset cancellation for the current signal to remove an offset of the current signal, and converting the current signal without the offset to a voltage signal for fingerprint data analysis.

公开(公告)号：US11709565B2

公开(公告)日：2023-07-25

申请号：US17558611

申请日：2021-12-22

Applicant: Novatek Microelectronics Corp.

Inventor： Yu-Hsien Lee ,  Ting-Hsuan Hung ,  Feng-Lin Chan ,  Wu Wei Lin

IPC: G06F3/041 ,  G06V40/13

CPC classification number: G06F3/04166 ,  G06F3/0412 ,  G06F3/04164 ,  G06V40/13

Abstract: A fingerprint sensing apparatus includes a plurality of fingerprint sensors and a fingerprint readout circuit. The fingerprint sensors may be configured to operate in a fingerprint sensing cycle. The fingerprint readout circuit may be coupled to the plurality of fingerprint sensors via a plurality of sensing lines. The fingerprint readout circuit may be configured to control the fingerprint sensors to operate in the fingerprint sensing cycle. The fingerprint sensing cycle includes an initialization period, an exposure period and a readout period. A voltage of a reset node in each fingerprint sensor among the plurality of fingerprint sensors is reset to a first voltage in a reset period after the fingerprint sensing cycle ends. The voltage of the reset node in each fingerprint sensor is initialized to an initial voltage in the initialization period. The initial voltage is different from the first voltage.

公开(公告)号：US20220357832A1

公开(公告)日：2022-11-10

申请号：US17738590

申请日：2022-05-06

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Hung-Kai Chen ,  Feng-Lin Chan

IPC: G06F3/041

Abstract: A touch control circuit, display-and-touch system, touch panel and touch sensing method are disclosed. The system includes a display panel, a touch panel having a plurality of touch sensors, a touch control circuit and at least one interference sensing capacitor configured to be insensitive to a touch on the touch panel and interference other than the interference from an interference layer of the display panel, the touch control circuit includes: at least one interference sensing channel configured to receive an interference sensing signal from the at least one interference sensing capacitor; and a plurality of touch sensing channels configured to receive touch sensing signals from at least part of touch sensors of the plurality of touch sensors; wherein a first electrode of each interference sensing capacitor is connected with the interference layer of the display panel, and a second electrode thereof is connected with a corresponding interference sensing channel.

公开(公告)号：US20220197469A1

公开(公告)日：2022-06-23

申请号：US17558611

申请日：2021-12-22

Applicant: Novatek Microelectronics Corp.

Inventor： Yu-Hsien Lee ,  Ting-Hsuan Hung ,  Feng-Lin Chan ,  Wu Wei Lin

IPC: G06F3/041 ,  G06V40/13

Abstract: A fingerprint sensing apparatus includes a plurality of fingerprint sensors and a fingerprint readout circuit. The fingerprint sensors may be configured to operate in a fingerprint sensing cycle. The fingerprint readout circuit may be coupled to the plurality of fingerprint sensors via a plurality of sensing lines. The fingerprint readout circuit may be configured to control the fingerprint sensors to operate in the fingerprint sensing cycle. The fingerprint sensing cycle includes an initialization period, an exposure period and a readout period. A voltage of a reset node in each fingerprint sensor among the plurality of fingerprint sensors is reset to a first voltage in a reset period after the fingerprint sensing cycle ends. The voltage of the reset node in each fingerprint sensor is initialized to an initial voltage in the initialization period. The initial voltage is different from the first voltage.

公开(公告)号：US20210349601A1

公开(公告)日：2021-11-11

申请号：US17313818

申请日：2021-05-06

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Chun-Hung Chen ,  Kai-Wen Shao ,  Feng-Lin Chan ,  Shuo-Wen Jang

IPC: G06F3/041 ,  G09G3/3208

Abstract: The disclosure provides a method for driving an OLED touch-and-display device, a driving circuit, and the OLED touch-and-display device. The method includes: dividing each display frame into at least one display period and at least one touch detection period which are alternated; during each display period, generating sequentially-shifted gate driving signals and sequentially-shifted light-emission control signals, and sequentially applying them to at least a part of gate driving lines of the plurality and corresponding light-emission control lines; during each touch detection period: suspending the generation of gate driving signals or also suspending the generation of light-emission control signals; adjusting the average display luminance of a plurality of rows of pixels within a predetermined time period, so that the display luminance is uniform, and the gate driving signal for each row of pixels and the light-emission control signal of the light-emission control line maintain a preset timing relationship.

公开(公告)号：US20210349600A1

公开(公告)日：2021-11-11

申请号：US17313810

申请日：2021-05-06

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Chun-Hung Chen ,  Kai-Wen Shao ,  Feng-Lin Chan ,  Shuo-Wen Jang

IPC: G06F3/041 ,  G09G3/3233 ,  G06F3/044

Abstract: The disclosure provides a method for driving an OLED touch-and-display device, a driving circuit, and an OLED touch-and-display device. The method includes: generating gate driving signals that are sequentially shifted based on the first clock signal (GCK); sequentially applying the gate driving signals that are sequentially shifted to the plurality of GLs; writing display data in a display driving period for each row of pixels, to the row of pixels, wherein a time length of the display driving period depends on a corresponding gate driving signal and is smaller than the clock cycle; and for a display driving period for each of at least one row of pixels, setting a touch detection period corresponding to the display driving period or corresponding to the display driving period for previous row of pixels at least partially overlapping with the display driving period in time.

公开(公告)号：US20210256240A1

公开(公告)日：2021-08-19

申请号：US16789448

申请日：2020-02-13

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hung-Kai Chen ,  Ting-Hsuan Hung ,  Chih-Yuan Chang ,  Feng-Lin Chan

IPC: G06K9/00

Abstract: A fingerprint detecting system comprises a fingerprint module, for receiving a fingerprint driving signal and performing a frequency modulation on the fingerprint driving signal, to correspondingly outputting a fingerprint signal with a first frequency based on the fingerprint driving signal, and a signal processing circuit, coupled to the fingerprint module, for receiving the fingerprint signal with the first frequency, performing a frequency demodulation to shift the first frequency of the fingerprint signal to a second frequency, and filtering the fingerprint signal with the second frequency based on the first frequency, whereby the filtered fingerprint signal is used for a fingerprint data analysis.

公开(公告)号：US11062650B2

公开(公告)日：2021-07-13

申请号：US16576776

申请日：2019-09-20

Applicant: Novatek Microelectronics Corp.

Inventor： Chih-Yuan Chang ,  Feng-Lin Chan

IPC: G09G3/3233 ,  H03F3/393

Abstract: A sensing circuit of a display device is provided. The sensing circuit includes a chopper circuit, a first operational amplifier and a filter. The chopper circuit is configured to receive a sensing input signal of the display device and modulate the sensing input signal. The first operational amplifier is coupled to the chopper circuit. The first operational amplifier is configured to receive the modulated sensing input signal and output the modulated sensing input signal to the chopper circuit. The chopper circuit is further configured to demodulate the modulated sensing input signal from the first operational amplifier and output the demodulated sensing input signal. The filter is coupled to the chopper circuit. The filter is configured to filter the demodulated sensing input signal from the chopper circuit and output the filtered sensing input signal as a sensing output signal. A source driver including the sensing circuit is also provided.