公开(公告)号：US20210305834A1

公开(公告)日：2021-09-30

申请号：US17205017

申请日：2021-03-18

Applicant: Silicon Integrated Systems Corp.

Inventor： Song-Sheng LIN ,  Keng-Nan CHEN

IPC: H02J7/00

Abstract: A constant current charging device is configured to charge a device to be charged and includes: a current regulating unit electrically coupled to the device to be charged and configured to provide a regulating current and a charging current according to a reference voltage; a current-to-voltage converting unit electrically coupled to the current regulating unit and configured to output a regulating voltage according to the regulating current; and a first operational amplifier electrically coupled to the current regulating unit, the current-to-voltage converting unit, and the device to be charged and configured to regulate the regulating current.

公开(公告)号：US11114979B2

公开(公告)日：2021-09-07

申请号：US16687708

申请日：2019-11-19

Applicant: Silicon Integrated Systems Corp.

Inventor： Wen-Chi Lin ,  Keng-Nan Chen

IPC: H03D13/00 ,  H03L7/093 ,  G04F10/00 ,  H01L29/872

Abstract: A frequency detector is used for detecting a frequency difference of a signal to be tested from a first time point to a second time point. The frequency detector includes: an alternating current coupled capacitor configured to receive the signal to be tested; a rectifying circuit electrically connected to the alternating current coupled capacitor; an analog-to-digital converter electrically connected to the rectifying circuit; a control unit electrically connected to the analog-to-digital converter; and a counter electrically connected to the rectifying circuit and the control unit, wherein the control unit is configured to calculate the frequency difference of the signal to be tested from the first time point to the second time point according to outputs of the analog-to-digital converter and outputs of the counter.

公开(公告)号：US10809858B2

公开(公告)日：2020-10-20

申请号：US16101548

申请日：2018-08-13

Applicant: Silicon Integrated Systems Corp.

Inventor： Hsin-Hsuan Yu ,  Jiun-Ying Yeh ,  Chin-Hua Kuo ,  Ying-Jyh Yeh

IPC: G06F3/044 ,  G06F3/047 ,  G06F3/041 ,  G06F3/0354

Abstract: A capacitive touch system and a sensing method thereof are disclosed. The capacitive touch system includes a touch panel including a plurality of driving electrodes and a plurality of sensing electrodes; a touch control chip; and an external device configured to transmit data to the touch control chip. In a position detection mode, the touch control chip drives the driving electrodes, reads a sensing signal from the sensing electrodes, and determines a position of a touch according to the sensing signal. In a data receiving mode, the touch control chip receives the data transmitted by the external device after a time delay period. In the capacitive touch system and the sensing method thereof, the position detection mode and the data receiving mode can be sequentially performed by delaying the time period.

公开(公告)号：US20190326868A1

公开(公告)日：2019-10-24

申请号：US16393363

申请日：2019-04-24

Applicant: Silicon Integrated Systems Corp

Inventor： Wen-Chi LIN ,  Ssu-Che YANG ,  Keng-Nan CHEN

IPC: H03G3/30 ,  H03F3/45 ,  H04R3/00

Abstract: An analog microphone and a control method thereof are disclosed. The analog microphone includes a sensor configured to sense an audio signal and convert the audio signal into an electrical signal; a charge pump configured to provide a bias voltage for the sensor to drive the sensor; a source follower configured to receive the electrical signal and convert the electrical signal into a source follower signal; a gain adjustable amplifier configured to receive the source follower signal, multiply the source follower signal by an amplifying factor, and output an amplified signal; and a detecting module configured to adaptively control the bias voltage of the charge pump and the amplified signal of the gain adjustable amplifier in response to the source follower signal of the source follower.

公开(公告)号：US20180173329A1

公开(公告)日：2018-06-21

申请号：US15840236

申请日：2017-12-13

Applicant: SILICON INTEGRATED SYSTEMS CORP.

Inventor： Keng-Nan Chen ,  Chia-Yi Chu ,  Han-Ning Chen ,  Wen-Chi Lin ,  Hui-Chung Chen

IPC: G06F3/038 ,  G06F3/0354 ,  G06F3/041

Abstract: An active stylus pen comprises a touch component and a pressure sensing module. One end of the touch component is disposed at a nib part of the active stylus pen, wherein the touch component is configured to receive an external pressure. The pressure sensing module is connected to the touch component, wherein the pressure sensing module is configured to generate an oscillation signal, wherein the oscillation signal has a first frequency when the touch component receives the external pressure and the external pressure reaches a first threshold value, and wherein the oscillation signal is adjusted to have a second frequency when the touch component receives the external pressure and the external pressure does not reach the first threshold value; wherein a difference of the first frequency and the second frequency is larger than a second threshold value.

公开(公告)号：US20180127264A1

公开(公告)日：2018-05-10

申请号：US15668844

申请日：2017-08-04

Applicant: SILICON INTEGRATED SYSTEMS CORP.

Inventor： Ssu-Che YANG ,  Wen-Chi LIN ,  Keng-Nan CHEN

IPC: B81B7/00 ,  G01R17/04

CPC classification number: B81B7/008 ,  B81B2201/02 ,  G01R17/04 ,  H02M3/07 ,  H04R3/04 ,  H04R2201/003 ,  H04R2410/00

Abstract: A sensing device includes a micro-electromechanical sensor, a source follower and an amplifier. The source follower includes a first output module including a first transistor and a second transistor. The micro-electromechanical sensor is configured to generate an input signal. A first terminal of the first transistor is configured to receive a first reference voltage. A second terminal and a control of the first transistor are electrically connected to the first output terminal and to a first current source respectively. A first terminal and a second terminal of the second transistor are electrically connected to the second terminal and the control terminal of the first transistor respectively. A control terminal of the second transistor is configured to receive the input signal. A first input terminal and a second input terminal of the amplifier are electrically connected to a first output terminal configured to receive a common-mode voltage respectively.

公开(公告)号：US20180121021A1

公开(公告)日：2018-05-03

申请号：US15693309

申请日：2017-08-31

Applicant: SILICON INTEGRATED SYSTEMS CORP.

Inventor： Hsin-Hsuan YU ,  Chin-Hua KUO

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0418 ,  G06F3/044

Abstract: A touch detection method is applied to a touch panel including sensing units and includes: detecting sensing values corresponding to the sensing units; selecting a first sensing value that is a local maximum among the sensing values; determining a first sensing unit corresponding to the first sensing value among the sensing units; selecting from the sensing units a second sensing unit located at the first side of the first sensing unit; selecting from the sensing values a second sensing value corresponding to the second sensing unit; and generating a touch coordinate according to the first sensing value, the second sensing value, a touch sensing value distribution model, and the coordinate of the first sensing unit.

公开(公告)号：US09898109B2

公开(公告)日：2018-02-20

申请号：US14958612

申请日：2015-12-03

Applicant: Silicon Integrated Systems Corp.

Inventor： Min-Yan Ciou ,  Chin-Hua Kuo ,  Ying-Jyh Yeh

IPC: G06F3/038 ,  G06F3/041 ,  G06F3/044 ,  G06F3/0354

CPC classification number: G06F3/0383 ,  G06F3/03545 ,  G06F3/0416 ,  G06F3/044

Abstract: The disclosure provides an active stylus pen and signal transmission methods for the active stylus pen and a touch panel. The stylus has a touch module, a switching module, a signal comparison module, a control module and a pressure sensing module. The stylus determines a first signal generated by a touch panel, and compares an intensity of the first signal and a reference value through a first transmission path. When the intensity of the first signal exceeds the reference value, the stylus outputs a second signal to the touch panel. After the stylus outputs the second signal to the touch panel, the stylus switches to a second transmission path from the first transmission path. The stylus outputs a header signal to the touch panel. When determining a first time sequential distribution, the stylus outputs at least one bit of a pressure signal according to a second time sequential distribution.

公开(公告)号：US20160162044A1

公开(公告)日：2016-06-09

申请号：US14958612

申请日：2015-12-03

Applicant: Silicon Integrated Systems Corp.

Inventor： Min-Yan CIOU ,  Chin-Hua KUO ,  Ying-Jyh YEH

IPC: G06F3/038 ,  G06F3/044 ,  G06F3/0354

CPC classification number: G06F3/0383 ,  G06F3/03545 ,  G06F3/0416 ,  G06F3/044

Abstract: The disclosure provides an active stylus pen and signal transmission methods for the active stylus pen and a touch panel. The stylus has a touch module, a switching module, a signal comparison module, a control module and a pressure sensing module. The stylus determines a first signal generated by a touch panel, and compares an intensity of the first signal and a reference value through a first transmission path. When the intensity of the first signal exceeds the reference value, the stylus outputs a second signal to the touch panel. After the stylus outputs the second signal to the touch panel, the stylus switches to a second transmission path from the first transmission path. The stylus outputs a header signal to the touch panel. When determining a first time sequential distribution, the stylus outputs at least one bit of a pressure signal according to a second time sequential distribution.

Abstract translation: 本公开提供了用于有源触笔和触摸面板的有源触笔和信号传输方法。 触笔具有触摸模块，开关模块，信号比较模块，控制模块和压力感测模块。 触笔确定由触摸面板产生的第一信号，并通过第一传输路径比较第一信号的强度和参考值。 当第一信号的强度超过参考值时，触笔将第二信号输出到触摸面板。 在触控笔将第二信号输出到触摸面板之后，触笔从第一传输路径切换到第二传输路径。 触控笔向触摸面板输出头信号。 当确定第一时间顺序分布时，触笔根据第二时间顺序分布输出压力信号的至少一位。

公开(公告)号：US09262026B2

公开(公告)日：2016-02-16

申请号：US14213250

申请日：2014-03-14

Applicant: SILICON INTEGRATED SYSTEMS CORP

Inventor： Jih-Ming Hsu ,  Chia-Yi Chu ,  Chin-Hua Kuo

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0416

Abstract: A capacitive touch device and a sensing method thereof are disclosed. The capacitive touch device includes a touch panel, at least one touch detection unit and a processing unit. The touch detection unit scans the touch panel, obtains an N-bit sensed data and compresses the N-bit sensed data to an L-bit sensed data. The processing unit receives the L-bit sensed data, decompresses the L-bit sensed data to the N-bit sensed data and calculates a coordinate of a touch according to the N-bit sensed data. The present invention is capable of decreasing the time for transmitting the sensed data, the power consumption and the requirements for the memory capacity of the touch detection unit and the memory capacity of the processing unit.

Abstract translation: 公开了电容式触摸装置及其感测方法。 电容式触摸装置包括触摸面板，至少一个触摸检测单元和处理单元。 触摸检测单元扫描触摸面板，获得N位感测数据，并将N位感测数据压缩为L位感测数据。 处理单元接收L位检测数据，将L位检测数据解压缩为N位检测数据，并根据N位检测数据计算触摸坐标。 本发明能够减少发送感测数据的时间，功耗以及触摸检测单元的存储容量的要求和处理单元的存储容量。