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公开(公告)号：US09119249B2
公开(公告)日：2015-08-25
申请号：US14058951
申请日：2013-10-21
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Hsing-Chien Yang , Wen-Hsin Cheng , Ying-Hao Hsu , Lan-Ting Hsu , Tsung-Hau Chang
CPC classification number: H05B33/0806 , H05B33/0818 , H05B33/0845
Abstract: A light-emitting diode (LED) driving circuit includes an LED control circuit and a power stage circuit. The LED control circuit shifts an input pulse width modulation (PWM) signal toward a higher frequency direction in a frequency domain to generate an output PWM signal having a duty cycle substantially the same as a duty cycle of the input PWM signal. The power stage circuit outputs an LED driving current according to the output PWM signal.
Abstract translation: 发光二极管（LED）驱动电路包括LED控制电路和功率级电路。 LED控制电路在频域中将输入脉宽调制（PWM）信号向较高频率方向移位，以产生具有与输入PWM信号的占空比基本相同的占空比的输出PWM信号。 功率级电路根据输出PWM信号输出LED驱动电流。
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公开(公告)号：US20220122552A1
公开(公告)日：2022-04-21
申请号：US17467443
申请日：2021-09-06
Applicant: NOVATEK Microelectronics Corp.
Inventor： Chun-Fu Lin , Hsing-Kuo Chao , Jhih-Siou Cheng , Ju-Lin Huang , Wen-Hsin Cheng
IPC: G09G3/34 , G02F1/1335 , G02F1/13357
Abstract: An LED backlight driver includes at least one driving chip configured to drive a backlight module. The at least one driving chip is disposed on at least one chip-on-film package, and not in direct contact with the backlight module to reduce heat transfer to the backlight module.
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Patent Agency Ranking
公开(公告)号：US20140042917A1
公开(公告)日：2014-02-13
申请号：US14058951
申请日：2013-10-21
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Hsing-Chien YANG , Wen-Hsin Cheng , Ying-Hao Hsu , Lan-Ting Hsu , Tsung-Hau Chang
IPC: H05B33/08
CPC classification number: H05B33/0806 , H05B33/0818 , H05B33/0845
Abstract: A light-emitting diode (LED) driving circuit includes an LED control circuit and a power stage circuit. The LED control circuit shifts an input pulse width modulation (PWM) signal toward a higher frequency direction in a frequency domain to generate an output PWM signal having a duty cycle substantially the same as a duty cycle of the input PWM signal. The power stage circuit outputs an LED driving current according to the output PWM signal.
Abstract translation: 发光二极管（LED）驱动电路包括LED控制电路和功率级电路。 LED控制电路在频域中将输入脉宽调制（PWM）信号向较高频率方向移位，以产生具有与输入PWM信号的占空比基本相同的占空比的输出PWM信号。 功率级电路根据输出PWM信号输出LED驱动电流。
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公开(公告)号：US09494961B2
公开(公告)日：2016-11-15
申请号：US14818314
申请日：2015-08-05
Applicant: NOVATEK Microelectronics Corp.
Inventor： Min-Chieh Hsu , Wen-Hsin Cheng
CPC classification number: G05F1/575 , H05B33/0812 , H05B33/0851
Abstract: A feedback device for a constant current driver controls a power supply module in the constant current driver to generate an output voltage. The constant current driver drives an electrical load with an output current. The feedback device includes a feedback control module and a feedback output unit. The feedback control module is utilized for receiving a load driven voltage related to the electrical load and generating a control voltage accordingly. The feedback output unit is utilized for generating a feedback current via an equivalent resistor of the feedback output unit according to a voltage difference between the control voltage and a feedback voltage of the power supply module. The power supply module controls the magnitude of the output voltage according to the feedback current, allowing the constant current driver to drive the electrical load with the output current.
Abstract translation: 用于恒流驱动器的反馈装置控制恒流驱动器中的电源模块以产生输出电压。 恒流驱动器通过输出电流驱动电气负载。 反馈装置包括反馈控制模块和反馈输出单元。 反馈控制模块用于接收与电负载相关的负载驱动电压并相应地产生控制电压。 反馈输出单元用于根据控制电压和电源模块的反馈电压之间的电压差，经由反馈输出单元的等效电阻产生反馈电流。 电源模块根据反馈电流控制输出电压的大小，允许恒流驱动器以输出电流驱动电气负载。
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公开(公告)号：US20160239030A1
公开(公告)日：2016-08-18
申请号：US14818314
申请日：2015-08-05
Applicant: NOVATEK Microelectronics Corp.
Inventor： Min-Chieh Hsu , Wen-Hsin Cheng
CPC classification number: G05F1/575 , H05B33/0812 , H05B33/0851
Abstract: A feedback device for a constant current driver controls a power supply module in the constant current driver to generate an output voltage. The constant current driver drives an electrical load with an output current. The feedback device includes a feedback control module and a feedback output unit. The feedback control module is utilized for receiving a load driven voltage related to the electrical load and generating a control voltage accordingly. The feedback output unit is utilized for generating a feedback current via an equivalent resistor of the feedback output unit according to a voltage difference between the control voltage and a feedback voltage of the power supply module. The power supply module controls the magnitude of the output voltage according to the feedback current, allowing the constant current driver to drive the electrical load with the output current.
Abstract translation: 用于恒流驱动器的反馈装置控制恒流驱动器中的电源模块以产生输出电压。 恒流驱动器通过输出电流驱动电气负载。 反馈装置包括反馈控制模块和反馈输出单元。 反馈控制模块用于接收与电负载相关的负载驱动电压并相应地产生控制电压。 反馈输出单元用于根据控制电压和电源模块的反馈电压之间的电压差，经由反馈输出单元的等效电阻产生反馈电流。 电源模块根据反馈电流控制输出电压的大小，允许恒流驱动器以输出电流驱动电气负载。
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公开(公告)号：US11823635B2
公开(公告)日：2023-11-21
申请号：US17467443
申请日：2021-09-06
Applicant: NOVATEK Microelectronics Corp.
Inventor： Chun-Fu Lin , Hsing-Kuo Chao , Jhih-Siou Cheng , Ju-Lin Huang , Wen-Hsin Cheng
IPC: G09G3/30 , G09G3/34 , G02F1/1335 , G02F1/13357
CPC classification number: G09G3/3426 , G02F1/133603 , G02F1/133612 , G02F1/133628 , G09G2300/0408
Abstract: An LED backlight driver includes at least one driving chip configured to drive a backlight module. The at least one driving chip is disposed on at least one chip-on-film package, and not in direct contact with the backlight module to reduce heat transfer to the backlight module.
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公开(公告)号：US20190325808A1
公开(公告)日：2019-10-24
申请号：US15957910
申请日：2018-04-20
Applicant: Novatek Microelectronics Corp.
Inventor： Keko-Chun Liang , Jhih-Siou Cheng , Wen-Hsin Cheng
IPC: G09G3/20
Abstract: A driver of a display panel comprises an operational amplifier and a bias control circuit. The operational amplifier outputs an output signal to drive the display panel according to a bias voltage. The bias control circuit is coupled to the operational amplifier and is configured to output the bias voltage to the operational amplifier, wherein the bias control circuit generates the bias voltage according to a random bit stream. The bias voltage is changed according to signal levels of the random bit stream, and a systematic voltage offset of the operational amplifier is adjusted according to the bias voltage. A method adapted to a driver of a display panel, and a display system are also introduced.
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