公开(公告)号：US12131716B1

公开(公告)日：2024-10-29

申请号：US18488994

申请日：2023-10-17

Applicant: NOVATEK Microelectronics Corp.

Inventor： Wei-Jen Lai ,  Jen-Hao Liao

IPC: G09G3/36

CPC classification number: G09G3/3677 ,  G09G2310/08 ,  G09G2330/021

Abstract: A gate line driver is provided and includes first to second transistors and first to third switches. The first transistor and the second transistor are coupled in series between a first voltage terminal and a second voltage terminal. The first switch has a first terminal coupled to a first node between the first and second transistors. The second switch has a first terminal coupled to a third voltage terminal and a second terminal coupled to a second terminal of the first switch at a second node. The third switch has a first terminal coupled to the third voltage terminal, a second terminal coupled to the first node, and a third terminal coupled to the second node.

公开(公告)号：US11019700B2

公开(公告)日：2021-05-25

申请号：US16387539

申请日：2019-04-18

Applicant: Novatek Microelectronics Corp.

Inventor： Wei-Jen Lai

IPC: H05B45/40 ,  H05B45/50

Abstract: A light-emitting diode driving system including a load, a power supply circuit and a light-emitting diode driving device is provided. The load includes one or more light-emitting diode strings. The power supply circuit outputs an output voltage to drive the load according to a feedback signal. The light-emitting diode driving device includes at least one current source, at least one comparator and a control logic circuit. The current source outputs a current to drive the load. The comparator compares a first voltage from the current source to a reference voltage and outputs a second voltage according to a comparison result. The control logic circuit includes a control node. The control logic circuit receives the second voltage through the control node and converts the second voltage to a control signal to adjust a resistance value of a variable resistor circuit. A light-emitting diode driving device is also provided.

公开(公告)号：US11265986B2

公开(公告)日：2022-03-01

申请号：US17172953

申请日：2021-02-10

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Wei-Jen Lai ,  Neng-Chieh Hsu ,  Zhen-Guo Ding ,  Kang-Fan Yeh

IPC: G09G3/34 ,  G09G5/12 ,  H05B45/325

Abstract: An LED controller is used with a video source and at least one LED unit, and includes a control signal generator and a driver. The control signal generator performs pulse width modulation based on a first clock signal, a second clock signal and a data signal, which is generated by the video source, to generate at least one control signal. The first and second clock signals are independent of a vertical synchronization signal that is generated by the video source. The driver generates, based on the at least one control signal, at least one drive signal that is related to light emission of the at least one LED unit.

公开(公告)号：US20230208295A1

公开(公告)日：2023-06-29

申请号：US17563091

申请日：2021-12-28

Applicant: NOVATEK Microelectronics Corp.

Inventor： Wei-Jen Lai ,  Jen-Hao Liao

IPC: H02M3/158 ,  H02M1/08

CPC classification number: H02M3/158 ,  H02M1/08

Abstract: A power supply circuit for a switching converter includes a power stage and a signal selector. The power stage has a first voltage port, a second voltage port, a third voltage port and a fourth voltage port, and has a first device terminal and a second device terminal configured to be coupled to a power storage device. The power stage includes a first switch coupled between the first voltage port and the first device terminal, a second switch coupled between the second voltage port and the second device terminal, a third switch coupled between the third voltage port and the first device terminal, and a fourth switch coupled between the fourth voltage port and the second device terminal. The signal selector, coupled to the power stage, is configured to select one of a plurality of control signals to be output to each of the first to fourth switches.

公开(公告)号：US10966296B1

公开(公告)日：2021-03-30

申请号：US16902472

申请日：2020-06-16

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Wei-Jen Lai ,  Neng-Chieh Hsu ,  Zhen-Guo Ding ,  Kang-Fan Yeh

IPC: G09G3/34 ,  G09G5/12 ,  H05B45/325

Abstract: An LED controller is used with a video source and at least one LED unit, and includes a control signal generator and a driver. The control signal generator performs pulse width modulation based on a first clock signal, a second clock signal and a data signal, which is generated by the video source, to generate at least one control signal. The first and second clock signals are independent of a vertical synchronization signal that is generated by the video source. The driver generates, based on the at least one control signal, at least one drive signal that is related to light emission of the at least one LED unit.

公开(公告)号：US20190327808A1

公开(公告)日：2019-10-24

申请号：US16387539

申请日：2019-04-18

Applicant: Novatek Microelectronics Corp.

Inventor： Wei-Jen Lai

IPC: H05B33/08

Abstract: A light-emitting diode driving system including a load, a power supply circuit and a light-emitting diode driving device is provided. The load includes one or more light-emitting diode strings. The power supply circuit outputs an output voltage to drive the load according to a feedback signal. The light-emitting diode driving device includes at least one current source, at least one comparator and a control logic circuit. The current source outputs a current to drive the load. The comparator compares a first voltage from the current source to a reference voltage and outputs a second voltage according to a comparison result. The control logic circuit includes a control node. The control logic circuit receives the second voltage through the control node and converts the second voltage to a control signal to adjust a resistance value of a variable resistor circuit. A light-emitting diode driving device is also provided.