公开(公告)号：US20180062508A1

公开(公告)日：2018-03-01

申请号：US15798193

申请日：2017-10-30

Applicant: Apple Inc.

Inventor： Weijun YAO ,  David A. STRONKS ,  Hopil BAE ,  Kingsuk BRAHMA ,  Wei Hsin YAO ,  Yafei BI ,  Yingxuan LI

IPC: H02M3/07 ,  H01L23/64 ,  G06F3/044 ,  G06F1/32 ,  G06F3/041

CPC classification number: H02M3/07 ,  G06F1/3262 ,  G06F3/041 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/044 ,  H01L23/642

Abstract: A charge pump that can be configured to operate in a first mode and a second mode is disclosed. The charge pump can comprise a charging capacitor coupled to a first node and configured to transfer a first DC voltage to the first node. The charge pump can also comprise a first output node and a second output node coupled to the first node. During the first mode, the first output node can be configured to output a second DC voltage based on the first DC voltage, and the second output node can be configured to output a third DC voltage based on the first DC voltage. During the second mode, the first output node can be configured to output the second DC voltage, and the second output node can be configured to output an AC voltage, the AC voltage being offset by the third DC voltage.

公开(公告)号：US20170139539A1

公开(公告)日：2017-05-18

申请号：US15313549

申请日：2014-05-22

Applicant: Apple Inc.

Inventor： Weijun YAO ,  Ahmad AL-DAHLE ,  Hyunwoo NHO ,  Taif A. SYED ,  Wei Hsin YAO ,  Yingxuan LI

IPC: G06F3/041 ,  H01L27/12 ,  G06F3/044

CPC classification number: G06F3/0418 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/044 ,  G06F2203/04104 ,  G06F2203/04108 ,  H01L27/124 ,  H01L27/1255

Abstract: A self-capacitance touch screen. In some examples, the touch screen comprises a plurality of display pixels, a first display pixel of the plurality of display pixels including a first touch electrode of a plurality of touch electrodes, and a gate line coupled to the first display pixel, wherein the gate line is configured such that a voltage at the gate line substantially follows a voltage at the first touch electrode. In some examples, the gate line is coupled to a resistor, the resistor being configured to decouple the gate line from ground. In some examples, the gate line is coupled to an AC voltage source.

公开(公告)号：US20170090644A1

公开(公告)日：2017-03-30

申请号：US15039400

申请日：2014-09-30

Applicant: APPLE INC.

Inventor： Weijun YAO ,  Wei Hsin YAO ,  Yingxuan LI ,  Bingrui YANG ,  Marduke YOUSEFPOR ,  Abbas JAMSHIDI-ROUDBARI ,  Ahmad AL-DAHLE

IPC: G06F3/041 ,  H01L27/32 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G06F3/044 ,  H01L27/323 ,  H01L27/3248 ,  H01L27/3265

Abstract: A self-capacitive touch sensor panel configured to have a portion of both the touch and display functionality integrated into a common layer is provided. The touch sensor panel includes a layer with circuit elements that can switchably operate as both touch circuitry and display circuitry such that during a touch mode of the device the circuit elements operate as touch circuitry and during a display mode of the device the circuit elements operate as display circuitry. The touch mode and display mode can be time multiplexed. By integrating the touch hardware and display hardware into common layers, savings in power, weight and thickness of the device can be realized.

公开(公告)号：US20160241139A1

公开(公告)日：2016-08-18

申请号：US15043405

申请日：2016-02-12

Applicant: Apple Inc.

Inventor： Weijun YAO ,  David A. STRONKS ,  Hopil BAE ,  Kingsuk BRAHMA ,  Wei Hsin YAO ,  Yafei BI ,  Yingxuan LI

IPC: H02M3/07 ,  G06F3/044 ,  G06F3/041

CPC classification number: H02M3/07 ,  G06F1/3262 ,  G06F3/041 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/044 ,  H01L23/642

Abstract: A charge pump that can be configured to operate in a first mode and a second mode is disclosed. The charge pump can comprise a charging capacitor coupled to a first node and configured to transfer a first DC voltage to the first node. The charge pump can also comprise a first output node and a second output node coupled to the first node. During the first mode, the first output node can be configured to output a second DC voltage based on the first DC voltage, and the second output node can be configured to output a third DC voltage based on the first DC voltage. During the second mode, the first output node can be configured to output the second DC voltage, and the second output node can be configured to output an AC voltage, the AC voltage being offset by the third DC voltage.

Abstract translation: 公开了一种可被配置为在第一模式和第二模式下操作的电荷泵。 电荷泵可以包括耦合到第一节点并被配置为将第一DC电压传送到第一节点的充电电容器。 电荷泵还可以包括耦合到第一节点的第一输出节点和第二输出节点。 在第一模式期间，第一输出节点可以被配置为基于第一DC电压输出第二DC电压，并且第二输出节点可以被配置为基于第一DC电压输出第三DC电压。 在第二模式期间，第一输出节点可以被配置为输出第二DC电压，并且第二输出节点可以被配置为输出AC电压，AC电压被第三DC电压偏移。

公开(公告)号：US20160216836A1

公开(公告)日：2016-07-28

申请号：US14606996

申请日：2015-01-27

Applicant: APPLE INC.

Inventor： Weijun YAO ,  Wei Hsin YAO ,  Yingxuan LI

IPC: G06F3/041 ,  G06F3/047 ,  G09G5/00 ,  G06F3/044

CPC classification number: G06F3/0418 ,  G06F3/0416 ,  G06F3/044

Abstract: A sense amplifier can be designed with a series variable resistance circuit to dynamically adjust an input resistance in series with the sense amplifier for stability during the different operating modes. In some examples, a switchable resistor can be switched into the input path of the sense amplifier for stability when required by increased capacitive loading of the sense electrodes, and can be switched out of the input path of the sense amplifier when unnecessary for stability. In some examples, an adjustable resistor can be coupled to and in series with the input of the sense amplifier. The resistance of the adjustable resistor can be tuned to stabilize the sense amplifier during operating modes having increased capacitive loading from the sense electrodes and can be minimized when additional input resistance is unnecessary for stability.

Abstract translation: 读出放大器可以设计成具有串联可变电阻电路，以便在不同的工作模式下动态地调整与读出放大器串联的输入电阻以获得稳定性。 在一些示例中，当需要增加感测电极的电容负载时，可切换电阻器可以切换到读出放大器的输入路径，以便稳定，并且当不需要稳定性时，可以切换到读出放大器的输入路径。 在一些示例中，可调电阻器可以耦合到读出放大器的输入端并与其串联。 可调节可调电阻器的电阻，以便在具有来自感测电极的增加的电容负载的操作模式期间稳定读出放大器，并且当为了稳定性不需要额外的输入电阻时可以最小化该电阻。

公开(公告)号：US20150109212A1

公开(公告)日：2015-04-23

申请号：US14059411

申请日：2013-10-21

Applicant: Apple Inc.

Inventor： Weijun YAO ,  Ahmad AL-DAHLE ,  Yingxuan LI ,  Wei Hsin YAO

IPC: G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0416

Abstract: Systems and processes for stimulating a touch sensor panel using orthogonal frequencies are provided. In one example process, the drive lines of the touch sensor panel can be stimulated with stimulation signals having orthogonal frequencies. The orthogonal frequencies can be separated by a frequency that is inversely proportional to an integration time of the touch sensor panel. The touch signals generated in response to the stimulation signals can be amplified, converted into digital form, demodulated using the orthogonal frequencies, and integrated over the integration time. Integrating the demodulated signals over a length of time that is inversely proportional to the frequency spacing between the orthogonal frequencies reduces or eliminates interference in the touch signals caused by the stimulation signals having different frequencies.

Abstract translation: 提供了使用正交频率来刺激触摸传感器面板的系统和过程。 在一个示例性过程中，可以用具有正交频率的刺激信号来刺激触摸传感器面板的驱动线。 正交频率可以与与触摸传感器面板的积分时间成反比的频率分开。 响应于刺激信号产生的触摸信号可以被放大，转换成数字形式，使用正交频率进行解调，并在积分时间内积分。 在与正交频率之间的频率间隔成反比的时间长度上整合解调信号减少或消除由具有不同频率的刺激信号引起的触摸信号中的干扰。