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    Differential difference amplifier circuit having variable transconductance
    32.
    发明授权
    Differential difference amplifier circuit having variable transconductance 有权

    公开(公告)号：US10971080B2

    公开(公告)日：2021-04-06

    申请号：US16815129

    申请日：2020-03-11

    Applicant: NOVATEK MICROELECTRONICS CORP.

    Inventor： Chih-Hsien Chou ,  Po-Yu Tseng ,  Jhih-Siou Cheng

    IPC: G09G3/20 ,  G09G3/3283 ,  H03F3/45 ,  G09G3/36

    Abstract: The differential difference amplifier circuit includes a differential input stage circuit, a loading stage circuit coupled to the differential input stage circuit, and an output stage circuit coupled to the loading stage circuit. The output stage circuit is configured to generate an output signal. The differential input stage circuit includes a first differential pair having a first transconductance and a second differential pair having a second transconductance. The first differential pair is biased by a first current source and receives a first input signal and the output signal. The second differential pair is biased by a second current source and receives a second input signal and the output signal. At least one of the first transconductance and the second transconductance is adjusted according to the image data.

    Source driver
    33.
    发明授权
    Source driver 有权

    公开(公告)号：US10777146B2

    公开(公告)日：2020-09-15

    申请号：US16512414

    申请日：2019-07-16

    Applicant: Novatek Microelectronics Corp.

    Inventor： Chih-Hsien Chou ,  Po-Yu Tseng ,  Jhih-Siou Cheng ,  Jin-Yi Lin

    IPC: G09G3/3291

    Abstract: A source driver including a sensing circuit and an operational amplifier is provided. The sensing circuit senses pixel information of an organic light-emitting diode (OLED) pixel circuit. The operational amplifier includes an amplifier circuit and an offset voltage storing and reducing circuit. An input terminal of the amplifier circuit is coupled to the sensing circuit. The amplifier circuit includes a first gain circuit and a second gain circuit. An output terminal of the offset voltage storing and reducing circuit is coupled to a coupling terminal of the first gain circuit. An input terminal of the offset voltage storing and reducing circuit is coupled to an output terminal of the second gain circuit. The offset voltage storing and reducing circuit stores and reduces an offset voltage of the first gain circuit.

    Operational amplifier circuit using variable bias control
    36.
    发明授权
    Operational amplifier circuit using variable bias control 有权

    公开(公告)号：US10224886B2

    公开(公告)日：2019-03-05

    申请号：US15716789

    申请日：2017-09-27

    Applicant: NOVATEK MICROELECTRONICS CORP.

    Inventor： Chih-Wen Lu ,  Po-Yu Tseng ,  Jhih-Siou Cheng ,  Shang-I Liu ,  Chih-Hsien Chou

    IPC: H03F3/45 ,  G05F1/56 ,  H03F1/32 ,  H03F3/30

    Abstract: An operational amplifier circuit is provided. The operational amplifier circuit includes a differential input stage circuit and a loading stage circuit. The differential input stage circuit includes a first current source, a first transistor, a second transistor, a third transistor, and a fourth transistor. The control terminal of the first transistor receives a first input signal. The control terminal of the second transistor receives a second input signal. The third transistor has a first terminal coupled to the second terminal of the first transistor, a second terminal coupled to the first current source, and a control terminal coupled to the control terminal of the second transistor. The fourth transistor has a first terminal coupled to the second terminal of the second transistor, a second terminal coupled to the first current source, and a control terminal coupled to the control terminal of the first transistor.

    GATE DRIVER CIRCUIT, DISPLAY APPARATUS HAVING THE SAME, AND GATE DRIVING METHOD
    38.
    发明申请
    GATE DRIVER CIRCUIT, DISPLAY APPARATUS HAVING THE SAME, AND GATE DRIVING METHOD 有权
    门控驱动电路，具有相同的显示设备和门驱动方法

    公开(公告)号：US20160307529A1

    公开(公告)日：2016-10-20

    申请号：US14687931

    申请日：2015-04-16

    Applicant: Novatek Microelectronics Corp.

    Inventor： Po-Yu Tseng ,  Chieh-An Lin ,  Po-Hsiang Fang ,  Jhih-Siou Cheng ,  Ju-Lin Huang ,  Yi-Chuan Liu

    IPC: G09G3/36 ,  G09G3/32

    CPC classification number: G09G3/3648 ,  G09G3/3258 ,  G09G3/3677 ,  G09G2300/04 ,  G09G2310/0291 ,  G09G2310/067 ,  G09G2310/08 ,  G09G2320/0223 ,  G09G2320/0252 ,  G09G2330/02

    Abstract: A gate driver, a display apparatus having the same, and a gate driving method are provided. The display apparatus includes a plurality of pixels, a data driver circuit, and a gate driver circuit. The gate driver circuit includes M groups of gate channels. Each of the M groups of gate channels includes a control circuit and an output buffer. The control circuit receives a power supply voltage from a power supply circuit and generates a modulated supply voltage. The output buffer is connected to the control circuit, the output buffer is powered by the modulated supply voltage to output a gate signal to a gate line of the display panel, wherein a driving pulse of the gate signal is shaped during a charge period according to the modulated supply voltage, and the shape of the driving pulse of the gate signal is maintained during a pre-charge period.

    Abstract translation: 提供了栅极驱动器，具有该栅极驱动器的显示装置和栅极驱动方法。 显示装置包括多个像素，数据驱动电路和栅极驱动电路。 栅极驱动器电路包括M组栅极通道。 M组栅极通道中的每一个包括控制电路和输出缓冲器。 控制电路从电源电路接收电源电压并产生调制电源电压。 输出缓冲器连接到控制电路，输出缓冲器由调制电源电压供电，以将栅极信号输出到显示面板的栅极线，其中栅极信号的驱动脉冲在充电期间根据 调制电源电压和门信号的驱动脉冲的形状在预充电期间保持。

    Self-detection charge sharing module
    39.
    发明授权
    Self-detection charge sharing module 有权
    自检电荷共享模块

    公开(公告)号：US09230495B2

    公开(公告)日：2016-01-05

    申请号：US14048013

    申请日：2013-10-07

    Applicant: NOVATEK Microelectronics Corp.

    Inventor： Chia-Wei Su ,  Po-Yu Tseng ,  Shun-Hsun Yang ,  Po-Hsiang Fang

    IPC: G09G3/36

    CPC classification number: G09G3/3614 ,  G09G2310/0248 ,  G09G2330/023

    Abstract: A self-detection charge sharing module for a liquid crystal display device is disclosed. The self-detection charge sharing module includes at least one detecting unit, for detecting a plurality of input voltages of a plurality of operational amplifiers driving a plurality of data line sand a plurality of output voltage of the plurality of data line, to generate at least one detecting result, and at least one charge sharing unit, for conducting connection between at least one first data line and at least one second data line among the plurality of data line when the at least one detecting result indicates at least one corresponding first input voltage and at least one corresponding second input voltage among the plurality of input voltage have opposite voltage variation direction and vary toward each other. The at least one first input voltage and the at least one second input voltage maintain respective polarities.

    Abstract translation: 公开了一种用于液晶显示装置的自检电荷共享模块。 自检电荷共享模块包括至少一个检测单元，用于检测多个运算放大器的多个输入电压，该多个运算放大器驱动多条数据线砂多个数据线的多个输出电压，至少产生 一个检测结果和至少一个电荷共享单元，用于当所述至少一个检测结果指示至少一个对应的第一输入电压时，在所述多个数据线中的至少一个第一数据线和至少一个第二数据线之间进行连接 并且所述多个输入电压中的至少一个对应的第二输入电压具有相反的电压变化方向并且彼此变化。 所述至少一个第一输入电压和所述至少一个第二输入电压维持相应的极性。

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