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。

公开(公告)号：US20140198089A1

公开(公告)日：2014-07-17

申请号：US13909084

申请日：2013-06-04

Applicant: Novatek Microelectronics Corp.

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

IPC: G06F1/32 ,  G09G3/36

CPC classification number: G06F1/32 ,  G06F1/3234 ,  G09G3/3611 ,  G09G2330/022 ,  Y02D50/20

Abstract: An image processing unit including an always on circuit block and a non-always on circuit block is provided. When operating under a first operation mode, the non-always on circuit block receives a bias voltage from a power supply unit, so as to perform an image processing operation on an image input signal. When operating under a second operation mode, the non-always on circuit block stops receiving the bias voltage from the power supply unit, so as to stop the image processing operation, and at least a microcontroller of the non-always on circuit block is powered down. One of the always on circuit block and the non-always on circuit block controls the power supply unit to stop supplying the bias voltage to the non-always on circuit block according an event trigger signal, such that the non-always on circuit block enters the second operation mode from the first operation mode.

Abstract translation: 提供一种包括总是在电路块和非始终在线电路块的图像处理单元。 当在第一操作模式下操作时，非始终接通电路块从电源单元接收偏置电压，以对图像输入信号执行图像处理操作。 当在第二操作模式下操作时，非始终在线电路块停止接收来自电源单元的偏置电压，以便停止图像处理操作，并且至少一个非始终在线电路块的微控制器被供电 下。 总是在电路块和不总是在电路块之一控制电源单元根据事件触发信号停止向非始终在线电路块提供偏置电压，使得不总是在电路块进入 从第一操作模式开始的第二操作模式。

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.

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.

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。

公开(公告)号：USRE50213E1

公开(公告)日：2024-11-19

申请号：US17833906

申请日：2022-06-07

Applicant: Novatek Microelectronics Corp.

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

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

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.

公开(公告)号：US09201483B2

公开(公告)日：2015-12-01

申请号：US13909084

申请日：2013-06-04

Applicant: Novatek Microelectronics Corp.

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

IPC: G06F3/038 ,  G06F1/32 ,  G09G3/36

CPC classification number: G06F1/32 ,  G06F1/3234 ,  G09G3/3611 ,  G09G2330/022 ,  Y02D50/20

Abstract: An image processing unit including an always on circuit block and a non-always on circuit block is provided. When operating under a first operation mode, the non-always on circuit block receives a bias voltage from a power supply unit, so as to perform an image processing operation on an image input signal. When operating under a second operation mode, the non-always on circuit block stops receiving the bias voltage from the power supply unit, so as to stop the image processing operation, and at least a microcontroller of the non-always on circuit block is powered down. One of the always on circuit block and the non-always on circuit block controls the power supply unit to stop supplying the bias voltage to the non-always on circuit block according an event trigger signal, such that the non-always on circuit block enters the second operation mode from the first operation mode.

Abstract translation: 提供了包括总是在电路块和非始终在线电路块的图像处理单元。 当在第一操作模式下操作时，非始终接通电路块从电源单元接收偏置电压，以对图像输入信号执行图像处理操作。 当在第二操作模式下操作时，非始终在线电路块停止接收来自电源单元的偏置电压，以便停止图像处理操作，并且至少一个非始终在线电路块的微控制器被供电 下。 总是在电路块和不总是在电路块之一控制电源单元根据事件触发信号停止向不总是在电路块提供偏置电压，使得不总是在电路块进入 从第一操作模式开始的第二操作模式。