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公开(公告)号：US20140285260A1
公开(公告)日：2014-09-25
申请号：US14295324
申请日：2014-06-03
Applicant: NOVATEK Microelectronics Corp.
Inventor： Xie-Ren Hsu , Ji-Ting Chen , Yao-Hung Kuo
Abstract: An output buffer circuit of a source driver includes an operational amplifier, having a first terminal as an output of the operational amplifier, and an output control unit, coupled between the output terminal of the operational amplifier and a second terminal for driving a load, to generate a variable impedance of a signal output path between the first terminal and the second terminal, wherein when the operational amplifier charges or discharges the second terminal to reach a predetermined level, the output control unit change a value of the variable impedance of the signal output path.
Abstract translation: 源极驱动器的输出缓冲器电路包括具有作为运算放大器的输出的第一端子的运算放大器和耦合在运算放大器的输出端和用于驱动负载的第二端子之间的输出控制单元， 产生第一端子和第二端子之间的信号输出路径的可变阻抗，其中当运算放大器对第二端子进行充电或放电以达到预定电平时，输出控制单元改变信号输出的可变阻抗值 路径。
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公开(公告)号：US20140253240A1
公开(公告)日：2014-09-11
申请号：US14053616
申请日：2013-10-15
Applicant: Novatek Microelectronics Corp.
Inventor： Kuo-Che Hong , Ji-Ting Chen
IPC: H03F3/16
CPC classification number: H03F3/16 , H03F3/4521
Abstract: A circuit of an operational amplifier includes an operational main circuit, a plurality of current sources, and at least one clamp circuit. The current sources are configured to connect the operational main circuit to a high voltage source or a ground voltage source. The clamp circuit is connected between the operational main circuit and at least one of the current sources. Here, a transistor device connected to the clamp circuit has a crossing-voltage endurance level which is lower than a preset crossing-voltage endurance level of the operational main circuit.
Abstract translation: 运算放大器的电路包括操作主电路，多个电流源和至少一个钳位电路。 电流源被配置为将操作主电路连接到高电压源或地电压源。 钳位电路连接在操作主电路和至少一个电流源之间。 这里，连接到钳位电路的晶体管器件的交叉电压耐受水平低于操作主电路的预设交叉耐压水平。
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公开(公告)号：US20140078189A1
公开(公告)日：2014-03-20
申请号：US13781777
申请日：2013-03-01
Applicant: NOVATEK MICROELECTRONICS CORP.
Inventor： Ji-Ting Chen , Wei-Hsiang Hung
CPC classification number: G09G3/00 , G09G2320/0276 , G09G2320/0626 , H02J4/00 , H04N5/148 , Y10T307/461
Abstract: A load driving apparatus for driving a plurality of loads is provided. The load driving apparatus includes an output stage module, a load driving module, and an output stage selection module. The output stage module includes a plurality of output stages. Each of the output stages is coupled to a corresponding one of the loads. The load driving module is coupled to the output stage module and outputs a driving signal to drive one of the loads through the output stage module. The output stage selection module is coupled between the output stage module and the load driving module and selects one of the output stages in the output stage module, so that the load driving module drives the load which is coupled to the selected output stage through the selected output stage. Furthermore, a grayscale voltage generating circuit including the foregoing load driving apparatus is also provided.
Abstract translation: 提供了用于驱动多个负载的负载驱动装置。 负载驱动装置包括输出级模块，负载驱动模块和输出级选择模块。 输出级模块包括多个输出级。 每个输出级耦合到相应的一个负载。 负载驱动模块耦合到输出级模块并输出驱动信号以通过输出级模块驱动负载之一。 输出级选择模块耦合在输出级模块和负载驱动模块之间，并选择输出级模块中的一个输出级，使得负载驱动模块通过所选择的驱动模块驱动耦合到所选输出级的负载 输出阶段。 此外，还提供了包括上述负载驱动装置的灰度级电压发生电路。
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公开(公告)号：US11015914B2
公开(公告)日：2021-05-25
申请号：US16252739
申请日：2019-01-21
Applicant: Novatek Microelectronics Corp.
Inventor： Chen-Tsung Wu , Ji-Ting Chen
Abstract: A capacitive image sensing device and a capacitive image sensing method are provided. The capacitive image sensing device includes a sensor array, a first charge amplifier, a second charge amplifier, a differential amplifier and a first switching circuit. The sensor array includes a plurality of sensing electrodes and a first reference sensing electrode. An input terminal of the first charge amplifier is coupled to one of the sensing electrodes. A first input terminal of the differential amplifier is selectively coupled to an output terminal of the first charge amplifier. A second input terminal of the differential amplifier is coupled to an output terminal of the second charge amplifier. The first switching circuit is configured to selectively electrically connect and disconnect the first reference sensing electrode and the input terminal of the second charge amplifier.
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公开(公告)号：US09990531B2
公开(公告)日：2018-06-05
申请号：US15229126
申请日：2016-08-05
Applicant: Novatek Microelectronics Corp.
Inventor： Ji-Ting Chen
CPC classification number: G06K9/00067 , G06K9/00013
Abstract: A reading device and a reading method for a fingerprint sensor are provided. The reading device includes a switching circuit, a plurality of analog front end (AFE) circuits and a calculation circuit. The switching circuit is coupled to a plurality of pixel units of the fingerprint sensor. The AFE circuits are coupled to the switching circuit. The calculation circuit is coupled to the AFE circuits for calculating a plurality of pixel data of the pixel units. For a first pixel unit among the pixel units, the calculation circuit reads the first pixel unit by using different AFE circuits among the AFE circuits, so as to obtain a plurality of first original sensing values of the first pixel unit. The calculation circuit calculates the pixel data of the first pixel unit according to the plurality of first original sensing values.
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Patent Agency Ranking
公开(公告)号：US20180114049A1
公开(公告)日：2018-04-26
申请号：US15299473
申请日：2016-10-21
Applicant: Novatek Microelectronics Corp.
Inventor： Ji-Ting Chen
IPC: G06K9/00
CPC classification number: G06K9/0012 , G06K9/0002
Abstract: A fingerprint sensor device and an operation method thereof are provided. The fingerprint sensor device includes a driving electrode, a driving circuit, a fingerprint sensing plate, a reading circuit and a determination circuit. The driving circuit applies a driving signal to an object through the driving electrode. The fingerprint sensing plate has sensing electrodes configured to sense the object. The reading circuit reads the driving signal through the fingerprint sensing plate. During a period between a rising edge time point and its adjacent falling edge time point of the driving signal, the reading circuit respectively samples the driving signal in at least two different phases to obtain at least two sampling results and outputs a difference value of the at least two sampling results. The determination circuit checks the difference value to determine whether the object to be sensed is a real finger or a fake finger.
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27.发明申请公开(公告)号：US20180005554A1
公开(公告)日：2018-01-04
申请号：US15706776
申请日：2017-09-18
Applicant: Novatek Microelectronics Corp.
Inventor： Ji-Ting Chen , Wei-Hsiang Hung
CPC classification number: G09G3/00 , G09G2320/0276 , G09G2320/0626 , H02J4/00 , H04N5/148 , Y10T307/461
Abstract: An operational amplifier applicable to a display device is provided. The operational amplifier having multiple output stages. The operational amplifier includes an input stage, an output stage selection module and a plurality of output stages. The output stage selection module is coupled to the input stage. Each of the output stages is coupled to the output stage selection module and is coupleable to drive a corresponding one of a plurality of loads. The output stage selection module is configured to selectively couple or discouple each of the output stages respectively to the input stage according to a plurality of selection signal. Furthermore, a load driving apparatus and a grayscale voltage generating circuit are also provided.
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公开(公告)号：US09299310B2
公开(公告)日：2016-03-29
申请号：US13753530
申请日：2013-01-30
Applicant: Novatek Microelectronics Corp.
Inventor： Kuo-Che Hong , Ji-Ting Chen
CPC classification number: G09G5/00 , G09G3/3614 , G09G3/3688 , G09G2310/0248 , G09G2310/0297 , G09G2330/023
Abstract: A load driving apparatus including a first driving unit, a second driving unit, and a circuit switch module is disclosed. The first and the second driving unit are respectively disposed at a first driving channel and a second driving channel and respectively output a first driving signal and a second driving signal for driving a first load and a second load during a channel output period. The circuit switch module is coupled between the first and the second driving channel and includes a plurality of signal transmitting paths. During a data loading period and a charge sharing period, the circuit switch module turns on all the signal transmitting paths, so that a charge sharing effect between the first load and the second load is achieved during the charge sharing period and accordingly the power consumption is reduced. Additionally, a load driving method of the load driving apparatus is disclosed.
Abstract translation: 公开了一种包括第一驱动单元，第二驱动单元和电路开关模块的负载驱动装置。 第一驱动单元和第二驱动单元分别设置在第一驱动通道和第二驱动通道处，并且在通道输出期间分别输出用于驱动第一负载和第二负载的第一驱动信号和第二驱动信号。 电路开关模块耦合在第一和第二驱动通道之间并且包括多个信号传输路径。 在数据加载期间和电荷共享期间，电路开关模块接通所有信号发送路径，从而在电荷共享期间实现第一负载和第二负载之间的电荷共享效应，因此功耗为 减少 此外，公开了一种负载驱动装置的负载驱动方法。
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29.发明申请公开(公告)号：US20160078837A1
公开(公告)日：2016-03-17
申请号：US14558733
申请日：2014-12-03
Applicant: Novatek Microelectronics Corp.
Inventor： Kuo-Che Hong , Ji-Ting Chen
CPC classification number: G09G3/3696 , G09G3/2007 , G09G3/3648 , G09G3/3688 , G09G2300/0828 , G09G2310/0291 , G09G2320/0673 , G09G2330/021
Abstract: A source driver, an operation method thereof and a driving circuit using the same are provided. The source driver includes a gamma voltage generating circuit, a first voltage buffer and a reference voltage driving circuit. The gamma voltage generating circuit receives an inter reference voltage to provide a first gray level reference voltage corresponding to a first display gray level. The first voltage buffer is used for receiving the first gray level reference voltage to provide a driving voltage. The reference voltage driving circuit is coupled to the gamma voltage generating circuit and the first voltage buffer and used for accelerating rising speed or falling speed of the first gray level reference voltage.
Abstract translation: 提供了源极驱动器，其操作方法和使用该驱动器的驱动电路。 源极驱动器包括伽马电压发生电路，第一电压缓冲器和参考电压驱动电路。 伽马电压发生电路接收中间参考电压以提供对应于第一显示灰度级的第一灰度级参考电压。 第一电压缓冲器用于接收第一灰度级参考电压以提供驱动电压。 参考电压驱动电路耦合到伽马电压产生电路和第一电压缓冲器，用于加速第一灰度级参考电压的上升速度或下降速度。
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公开(公告)号：US09166535B2
公开(公告)日：2015-10-20
申请号：US14053616
申请日：2013-10-15
Applicant: Novatek Microelectronics Corp.
Inventor： Kuo-Che Hong , Ji-Ting Chen
CPC classification number: H03F3/16 , H03F3/4521
Abstract: A circuit of an operational amplifier includes an operational main circuit, a plurality of current sources, and at least one clamp circuit. The current sources are configured to connect the operational main circuit to a high voltage source or a ground voltage source. The clamp circuit is connected between the operational main circuit and at least one of the current sources. Here, a transistor device connected to the clamp circuit has a crossing-voltage endurance level which is lower than a preset crossing-voltage endurance level of the operational main circuit.
Abstract translation: 运算放大器的电路包括操作主电路，多个电流源和至少一个钳位电路。 电流源被配置为将操作主电路连接到高电压源或地电压源。 钳位电路连接在操作主电路和至少一个电流源之间。 这里，连接到钳位电路的晶体管器件的交叉电压耐受水平低于操作主电路的预设交叉耐压水平。
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