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    Synchronous backlight device and operation method thereof
    3.
    发明授权
    Synchronous backlight device and operation method thereof 有权

    公开(公告)号：US10692443B2

    公开(公告)日：2020-06-23

    申请号：US15828396

    申请日：2017-11-30

    Applicant: Novatek Microelectronics Corp.

    Inventor： Chung-Wen Wu ,  Wen-Chi Lin ,  Sih-Ting Wang

    IPC: G09G3/34 ,  H03K7/08 ,  G02F1/13357

    Abstract: A synchronous backlight device and an operation method thereof are provided. The synchronous backlight device includes a pulse width modulation (PWM) control circuit and a backlight driving circuit. The PWM control circuit receives the video sync information from a video processing circuit and generates a PWM control signal. Wherein, the video sync information defines a plurality of video frame periods, the PWM control circuit at least divides each of the video frame periods into a first period and a second period, the lengths of the first periods of the video frame periods are equal to one another. The frequency of the PWM control signal in the first periods is different from the frequency of the PWM control signal in the second periods. The backlight driving circuit drives the backlight source of a display panel in accordance with the PWM control signal.

    Circuit arrangement for controlling backlight source and operation method thereof
    4.
    发明授权
    Circuit arrangement for controlling backlight source and operation method thereof 有权

    公开(公告)号：US10665177B2

    公开(公告)日：2020-05-26

    申请号：US16163593

    申请日：2018-10-18

    Applicant: Novatek Microelectronics Corp.

    Inventor： Chung-Wen Wu ,  Wen-Chi Lin ,  Jiun-Yi Lin

    IPC: G09G3/34 ,  G09G3/36

    Abstract: A circuit arrangement for controlling a backlight source and an operation method are provided. The circuit arrangement includes a generator. The generator receives a sync signal and generates a pulse width modulation signal synchronous with the sync signal to control the backlight source. The sync signal indicates a frequency of a video including a series of image frames. The sync signal includes a sync period corresponding to a frame of the video. The pulse width modulation signal includes a first waveform pattern in a first sub-period of the sync period and a second waveform pattern in a second sub-period of the sync period. Each of the first waveform pattern and the second waveform pattern includes at least one active pulse. The first waveform pattern is substantially identical to the second waveform pattern.

    SYNCHRONOUS BACKLIGHT DEVICE AND OPERATION METHOD THEREOF
    5.
    发明申请
    SYNCHRONOUS BACKLIGHT DEVICE AND OPERATION METHOD THEREOF 审中-公开

    公开(公告)号：US20190164506A1

    公开(公告)日：2019-05-30

    申请号：US15828396

    申请日：2017-11-30

    Applicant: Novatek Microelectronics Corp.

    Inventor： Chung-Wen Wu ,  Wen-Chi Lin ,  Sih-Ting Wang

    IPC: G09G3/34 ,  H03K7/08 ,  G02F1/1335

    Abstract: A synchronous backlight device and an operation method thereof are provided. The synchronous backlight device includes a pulse width modulation (PWM) control circuit and a backlight driving circuit. The PWM control circuit receives the video sync information from a video processing circuit and generates a PWM control signal. Wherein, the video sync information defines a plurality of video frame periods, the PWM control circuit at least divides each of the video frame periods into a first period and a second period, the lengths of the first periods of the video frame periods are equal to one another. The frequency of the PWM control signal in the first periods is different from the frequency of the PWM control signal in the second periods. The backlight driving circuit drives the backlight source of a display panel in accordance with the PWM control signal.

    Light-Emitting Diode Driving Device, Light-Emitting Diode Device, and Method for Driving the Same
    6.
    发明申请
    Light-Emitting Diode Driving Device, Light-Emitting Diode Device, and Method for Driving the Same 审中-公开
    发光二极管驱动装置，发光二极管装置及其驱动方法

    公开(公告)号：US20140354623A1

    公开(公告)日：2014-12-04

    申请号：US14459333

    申请日：2014-08-14

    Applicant: NOVATEK Microelectronics Corp.

    Inventor： Sih-Ting Wang ,  Chung-Wen Wu ,  Chien-Cheng Tu ,  Chia-Chun Liu

    IPC: G09G3/36

    CPC classification number: G09G3/3696 ,  H05B33/0827 ,  H05B33/089

    Abstract: A light-emitting diode driving device includes a light-emitting diode driving chip, for driving the one or more light-emitting diode strings according to a feedback voltage associated with the one or more light-emitting diode strings, and a voltage limiter, having a terminal coupled to the light-emitting diode driving chip and another terminal coupleable to the one or more light-emitting diode strings, for generating the feedback voltage for provision to the light-emitting diode driving chip according to a bottom voltage of the one or more light-emitting diode strings, and limiting the feedback voltage not to exceed a preset level; wherein the voltage limiter starts limiting the feedback voltage to substantially the preset level when the bottom voltage rises to the preset level.

    Abstract translation: 发光二极管驱动装置包括：发光二极管驱动芯片，用于根据与一个或多个发光二极管串相关联的反馈电压驱动一个或多个发光二极管串;以及电压限制器，具有 连接到所述发光二极管驱动芯片的端子和可耦合到所述一个或多个发光二极管串的另一端子，用于根据所述一个或多个发光二极管串的底部电压产生用于提供给所述发光二极管驱动芯片的反馈电压， 更多的发光二极管串，并且限制反馈电压不超过预设电平; 其中当底电压上升到预设电平时，限压器开始将反馈电压限制在基本上为预设电平。

    DISPLAY EQUIPMENT, BRIGHTNESS COMPENSATION DEVICE AND BRIGHTNESS COMPENSATION METHOD
    7.
    发明申请
    DISPLAY EQUIPMENT, BRIGHTNESS COMPENSATION DEVICE AND BRIGHTNESS COMPENSATION METHOD 有权

    公开(公告)号：US20220343871A1

    公开(公告)日：2022-10-27

    申请号：US17242278

    申请日：2021-04-27

    Applicant: Novatek Microelectronics Corp.

    Inventor： Po-Hsiang Huang ,  Chia-Hsing Hou ,  Yu-Lin Cheng ,  Chung-Wen Wu

    IPC: G09G3/36

    Abstract: The disclosure provides a display equipment, a brightness compensation device, and a brightness compensation method. The brightness compensation device includes a variable refresh rate (VRR) detection circuit and a control circuit. The VRR detection circuit and the control circuit receive a video stream from a video source device, and the video stream includes a VRR video frame. The VRR detection circuit detects a blanking period of the VRR video frame and generates a detection result. The control circuit outputs the frame data of the VRR video frame to the display device during the valid data period of the VRR video frame. The control circuit repeatedly outputs the frame data of the VRR video frame to the display device during the blanking period of the VRR video frame according to the detection result until the blanking period ends.

    Light-emitting diode driving circuit and light-emitting apparatus thereof
    8.
    发明授权
    Light-emitting diode driving circuit and light-emitting apparatus thereof 有权
    发光二极管驱动电路及其发光装置

    公开(公告)号：US09468064B1

    公开(公告)日：2016-10-11

    申请号：US14714360

    申请日：2015-05-18

    Applicant: Novatek Microelectronics Corp.

    Inventor： Chung-Wen Wu ,  Sih-Ting Wang ,  Wen-Chi Lin

    IPC: H05B33/08

    CPC classification number: H05B33/0845 ,  H05B33/0827

    Abstract: An LED driving circuit and a light-emitting apparatus thereof are provided. The driving circuit includes a voltage providing unit, a voltage setting unit, a current feedback unit and a current dithering unit. The voltage providing unit receives a voltage setting signal and an input voltage to provide an emission driving voltage to a first terminal of an LED string. The voltage setting unit receives an emission feedback signal to provide a voltage setting signal. The current feedback unit provides the emission feedback signal and sequentially receives current setting voltages to sequentially set a driving current flowing through the LED string according to the current setting voltages. The current dithering unit receives the backlight control signal to sequentially provide the current setting voltages.

    Abstract translation: 提供LED驱动电路及其发光装置。 驱动电路包括电压提供单元，电压设定单元，电流反馈单元和电流抖动单元。 电压提供单元接收电压设置信号和输入电压，以向LED串的第一端提供发射驱动电压。 电压设定单元接收发射反馈信号以提供电压设定信号。 电流反馈单元提供发射反馈信号，并依次接收电流设定电压，以根据当前设定电压依次设定流经LED串的驱动电流。 当前抖动单元接收背光控制信号以顺序提供当前设置电压。

    LIGHT CABINET SUITABLE FOR FORMING LIGHT WALL
    9.
    发明申请
    LIGHT CABINET SUITABLE FOR FORMING LIGHT WALL 有权

    公开(公告)号：US20220317965A1

    公开(公告)日：2022-10-06

    申请号：US17216701

    申请日：2021-03-30

    Applicant: Novatek Microelectronics Corp.

    Inventor： Wen-Chi Lin ,  Yuan-Yung Liao ,  Chung-Wen Wu ,  Chi-Han Lee ,  Jiun-Yi Lin ,  Po-Jui Huang ,  Chung-Wen Hung

    IPC: G06F3/14 ,  F21V23/00 ,  G09G5/00

    Abstract: The disclosure provides a light cabinet, including multiple light boards and multiple light-board controllers. The light boards form a first light-board array of the light cabinet. The light-board controllers are arranged one-to-one on the light boards. The light-board controllers of the light boards in a first column of the first light-board array are connected in series to form a first controller string. The output terminal of the first controller string is connected electrically to an input terminal of a second controller string in a corresponding column of a second light-board array of another light cabinet. The input terminal of the first controller string is connected electrically to a first output terminal of a video data splitter (or an output terminal of a third controller string in a corresponding column of a third light-board array of yet another light cabinet).

    Circuit arrangement for controlling backlight source and operation method thereof
    10.
    发明授权
    Circuit arrangement for controlling backlight source and operation method thereof 有权

    公开(公告)号：US10984733B2

    公开(公告)日：2021-04-20

    申请号：US16854920

    申请日：2020-04-22

    Applicant: Novatek Microelectronics Corp.

    Inventor： Chung-Wen Wu ,  Wen-Chi Lin ,  Jiun-Yi Lin

    IPC: G09G3/34 ,  G09G3/36

    Abstract: A circuit arrangement for controlling a backlight source and an operation method are provided. The circuit arrangement includes a generator. The generator receives a sync signal and generates a pulse width modulation signal synchronous with the sync signal to control the backlight source. The sync signal indicates a frequency of a video including a series of image frames. The sync signal includes a sync period corresponding to a frame of the video. The pulse width modulation signal includes a first waveform pattern in a first sub-period of the sync period and a second waveform pattern in a second sub-period of the sync period. Each of the first waveform pattern and the second waveform pattern includes at least one active pulse. The first waveform pattern is substantially identical to the second waveform pattern.

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