公开(公告)号：US12062329B2

公开(公告)日：2024-08-13

申请号：US18139682

申请日：2023-04-26

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Yu-Sheng Ma ,  Jhih-Siou Cheng ,  Chun-Fu Lin

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/06 ,  G09G2310/0202 ,  G09G2310/0272 ,  G09G2320/0233 ,  G09G2330/025

Abstract: A source driver and a driving system for driving an LED panel, and an LED display system are provided. The driving system includes: a plurality of source drivers, for respectively supplying driving currents to channels of different portions on the LED panel, and each source driver includes: a plurality of driving circuits, which are in one-to-one correspondence with the plurality of channels on the LED panel, and are connected to a same current control line, each driving circuit being configured to supply a driving current to a corresponding channel, wherein, the supplied driving current is associated with a voltage on the current control line which the driving circuit is connected with. When one or more driving circuits switch between a non-driving state and a driving state, the driving current being supplied by the driving circuit(s) being in the driving state in the plurality of source drivers is compensated.

公开(公告)号：US20240223161A1

公开(公告)日：2024-07-04

申请号：US18091381

申请日：2022-12-30

Applicant: Novatek Microelectronics Corp.

Inventor： Chih-Yuan Chang ,  Yu-Te Liao ,  Wei Cheng Liu

IPC: H03K3/011 ,  H03F1/08 ,  H03K5/26 ,  H03K17/56

CPC classification number: H03K3/011 ,  H03F1/08 ,  H03K5/26 ,  H03K17/56

Abstract: Pseudo resistor having an auto-tune function automatically calibrates resistance of the pseudo resistor and compensates for DC drift based on an output signal of an electrical circuit to which the pseudo resistor is coupled, as to mitigate signal phenomenon in the output signal caused by PVT variation. The pseudo resistor includes first transistor, second transistor, and adder. The first terminal of the second transistor is coupled to the first terminal of the first transistor and forms a first common node. The control terminal of the first transistor is coupled to the control terminal of the second transistor and forms second common node. The adder is coupled between the first and second common nodes and configured to receive adjustment voltage for generating a bias voltage for controlling the first and second transistors, where the adjustment voltage corresponds to the output signal coupled to the second terminal of the second transistor.

公开(公告)号：US12014564B2

公开(公告)日：2024-06-18

申请号：US17407133

申请日：2021-08-19

Applicant: Novatek Microelectronics Corp.

Inventor： Wei-Lun Shih ,  Wu Wei Lin ,  Kuei Jung Chen

IPC: G06V40/13 ,  G06F3/041 ,  G09G3/36

CPC classification number: G06V40/13 ,  G06F3/0412 ,  G09G3/36 ,  G09G2300/0408 ,  G09G2310/0286

Abstract: An electronic circuit adapted to control an operation of a gate driver circuit is provided. The electronic circuit includes a gate control circuit. The gate control circuit outputs control signals to the gate driver circuit in a display period and a fingerprint sensing period via the same output nodes. The control signals include a start pulse signal and a switch control signal. The switch control signal controls the gate driver circuit to operate in the display period or the fingerprint sensing period. The gate driver circuit includes a plurality of shift register groups and a switch circuit. The shift register groups output scan signals according to the start pulse signal. The switch circuit receives and outputs the scan signals to display scan lines in the display period and outputs the scan signals to fingerprint scan lines in the fingerprint sensing period according to the switch control signal.

公开(公告)号：US20240161672A1

公开(公告)日：2024-05-16

申请号：US18421930

申请日：2024-01-24

Applicant: Novatek Microelectronics Corp.

Inventor： Huan-Teng Cheng ,  Ting-Hsuan Hung ,  Tzu-Wen Hsieh ,  Wei-Lun Shih ,  Huang-Chin Tang

IPC: G09G3/20 ,  G06F3/041 ,  G06V40/13

CPC classification number: G09G3/20 ,  G06F3/0412 ,  G06V40/13 ,  G06V40/1318 ,  G09G2310/0272

Abstract: An electronic circuit including a plurality of common terminals, a first circuit, a second circuit, and a plurality of switch units is provided. The first circuit is configured to output display driving signals to data lines of a display panel via the common terminals. The second circuit is configured to receive fingerprint sensing signals from fingerprint sensing lines of the display panel via the common terminals. Each of the switch units includes a first terminal coupled to one of the common terminals and a plurality of second terminals coupled to the first circuit and the second circuit. The switch units are grouped into a plurality of groups, and each group corresponds to a fingerprint sensing channel of the second circuit.

公开(公告)号：US20240153970A1

公开(公告)日：2024-05-09

申请号：US18155760

申请日：2023-01-18

Applicant: Novatek Microelectronics Corp.

Inventor： Ya-Hsiang Tai ,  Yi-Cheng Yuan ,  Chen-Yu Lin

IPC: H01L27/146 ,  H04N25/78

CPC classification number: H01L27/14612 ,  H01L27/14621 ,  H04N25/78

Abstract: The invention provides a display device and a display panel. The display device includes the display panel and a reading circuit. The display panel includes an upper substrate, a lower substrate, a thin-film transistor (TFT) layer, and a photosensitive circuit. The TFT layer is disposed between the upper substrate and the lower substrate. A plurality of TFTs of a pixel array of the display panel are disposed in the TFT layer. The photosensitive circuit is disposed in the TFT layer to sense an ambient light. The reading circuit is coupled to the photosensitive circuit to read a sensing result.

公开(公告)号：US11978393B1

公开(公告)日：2024-05-07

申请号：US18325014

申请日：2023-05-29

Applicant: NOVATEK Microelectronics Corp.

Inventor： Shing-Ron Huang

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0819 ,  G09G2300/0852 ,  G09G2310/061 ,  G09G2310/08

Abstract: A pixel circuit includes a first transistor, a second transistor, a first capacitor, a third transistor, a second capacitor, and a fourth transistor. The first transistor is configured to receive a power voltage. The second transistor is configured to receive a data voltage and is coupled to a gate terminal of the first transistor. The first capacitor is coupled between the gate terminal of the first transistor and a source terminal of the first transistor. The third transistor is coupled between the source terminal of the first transistor and a light-emitting element. The second capacitor is coupled between the source terminal of the first transistor and a reference voltage. The fourth transistor is coupled between the source terminal of the first transistor and a reset voltage.

公开(公告)号：US11961584B2

公开(公告)日：2024-04-16

申请号：US17859010

申请日：2022-07-07

Applicant: Novatek Microelectronics Corp.

Inventor： Wu Wei Lin

IPC: G11C7/00 ,  G11C7/10 ,  G11C7/14

CPC classification number: G11C7/1069 ,  G11C7/1006 ,  G11C7/1039 ,  G11C7/14

Abstract: The present invention provides a readout integrated circuit and an operation method thereof. The readout integrated circuit includes a readout circuit, a line buffer and a communication interface circuit. The readout circuit reads out a plurality of row sensing results of a plurality of sensor rows of a sensor. The line buffer is coupled to the readout circuit for temporarily storing a current row sensing result of a current sensor row of the sensor. The communication interface circuit is coupled to the line buffer. After the current row sensing result of the current sensor row is temporarily stored into the line buffer, the communication interface circuit outputs the current row sensing result in real time to a host circuit.

公开(公告)号：US20240119916A1

公开(公告)日：2024-04-11

申请号：US17963997

申请日：2022-10-11

Applicant: Novatek Microelectronics Corp.

Inventor： Cheng Hsien Li ,  Yuan-Po Cheng

IPC: G09G5/12 ,  G09G5/18

CPC classification number: G09G5/12 ,  G09G5/18

Abstract: An electronic device includes an application processor and a display control circuit. The display control circuit may output a (tearing effect) TE signal to the application processor and receive an image frame from the application processor. A data processing circuit of the display control circuit generates a notification signal when the data processing circuit is ready to receive the image frame from the application processor. The timing controller generates the TE signal having a first frequency during a period from a first time point when the notification signal is received to a second time point when the application processor starts transmitting the image frame to the data processing circuit. The first frequency is greater than a reference frequency based on an output frame rate of the display control circuit.

公开(公告)号：US11953523B2

公开(公告)日：2024-04-09

申请号：US17539170

申请日：2021-11-30

Applicant: NOVATEK Microelectronics Corp.

Inventor： Tzu-Wei Lin ,  Hung-Kai Chen ,  Feng-Lin Chan

IPC: G01R1/30 ,  H03G3/30

CPC classification number: G01R1/30 ,  H03G3/30 ,  H03G2201/103

Abstract: An analog front-end (AFE) circuit, configured to be coupled to a sensor having a plurality of sensing units, includes a plurality of sensing circuits and a plurality of multiplexers. Each of the plurality of multiplexers is coupled between one of the plurality of sensing units and at least two of the plurality of sensing circuits.

公开(公告)号：US11942037B1

公开(公告)日：2024-03-26

申请号：US18318645

申请日：2023-05-16

Applicant: Novatek Microelectronics Corp.

Inventor： Zi-Yi Lian ,  Yen-Tao Liao

IPC: G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2320/0247 ,  G09G2340/0435

Abstract: An organic light emitting diode (OLED) display control circuit and a control method thereof are provided. The OLED control circuit includes a counting unit, a judgment unit, a remainder calculation unit and a signal compensation unit. The counting unit counts display lines of a current frame according to a vertical synchronization signal to generate a first count value. The judgment unit compares the first count value and a second count value to generate a judgment result. The second count value represents the number of display lines of a previous frame preceding to the current frame. The remainder calculation unit calculates a remainder generated by dividing the first count value by a period of an emission control signal. The signal compensation unit adjusts the emission control signal to compensate for an incomplete period of the emission control signal occurring in the end of the current frame period.