公开(公告)号：US20230230414A1

公开(公告)日：2023-07-20

申请号：US18123880

申请日：2023-03-20

Applicant: Apple Inc.

Inventor： Christoph H. KRAH ,  Mohammad Yeke Yazdandoost

IPC: G06V40/13 ,  H04N25/616

CPC classification number: G06V40/1318 ,  H04N25/616 ,  H04N25/75

Abstract: A method of temperature compensation in an optical-fingerprint detection system includes acquiring a first reading associated with one or more pixels of an array. The first reading is a baseline reading. The method further includes acquiring a second reading associated with the one or more pixels of the array. The second reading includes the baseline plus a signal. Producing a temperature compensated signal reading by subtracting the first reading from the second reading. The array is an optical-fingerprint array, and each pixel of the array is coupled to a readout circuit via a pixel switch. The method includes row-based and frame-based schemes and a blind pixel scheme. Readout circuit improvements including multiplexed analog front-end (AFE), charge magnifier with column charge offset compensation and a low-noise gate driver circuit are provided.

公开(公告)号：US20230094533A1

公开(公告)日：2023-03-30

申请号：US17933820

申请日：2022-09-20

Applicant: Apple Inc.

Inventor： Christoph H. KRAH ,  Bin HUANG ,  Stanley B. WANG

IPC: G06F3/041 ,  G09G3/32 ,  G06F3/042 ,  G06F3/044 ,  H01L27/15

Abstract: An electronic device can include integrated micro circuitry configurable for optical sensing and touch and/or proximity sensing. An integrated touch screen can include light emitting diodes or organic light emitting diodes and chiplets. In some examples, the LEDs/OLEDs and chiplets can be disposed in a visible area of the integrated touch screen. In some examples, some or all of the chiplets can be disposed outside of the visible area of the integrated touch screen. In some examples, the chiplets can include display driving circuitry and touch sensing circuitry, and can optionally perform optical sensing using the touch sensing circuitry. In some examples, the chiplets can include separate touch chiplets configured to perform touch sensing (and/or optical sensing) and display chiplets configured to perform display functionality (and optionally provide some switching functionality).

公开(公告)号：US20230040857A1

公开(公告)日：2023-02-09

申请号：US17805673

申请日：2022-06-06

Applicant: Apple Inc.

Inventor： Christoph H. KRAH

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

Abstract: A switching circuit is disclosed. The switching circuit can comprise a plurality of pixel mux blocks, each of the pixel mux blocks configured to be coupled to a respective touch node electrode on a touch sensor panel, and each of the pixel mux blocks including logic circuitry. The switching circuit can also comprise a plurality of signal lines configured to be coupled to sense circuitry, at least one of the signal lines configured to transmit a touch signal from one of the respective touch node electrodes to the sense circuitry. The logic circuitry in each pixel mux block of the plurality of pixel mux blocks can be configured to control the respective pixel mux block so as to selectively couple the respective pixel mux block to any one of the plurality of signal lines.

公开(公告)号：US20180321791A1

公开(公告)日：2018-11-08

申请号：US16039216

申请日：2018-07-18

Applicant: Apple Inc.

Inventor： Minh-Dieu Thi VU ,  Thomas James WILSON ,  Christoph H. KRAH

IPC: G06F3/041 ,  G06F3/0354 ,  G06F3/044 ,  G06F1/32

CPC classification number: G06F3/0416 ,  G06F1/3262 ,  G06F3/03545 ,  G06F3/041 ,  G06F3/044 ,  G06F2203/04104

Abstract: A device that can autonomously scan a sensor panel is disclosed. Autonomous scanning can be performed by implementing channel scan logic. In one embodiment, channel scan logic carries out many of the functions that a processor would normally undertake, including generating timing sequences and obtaining result data; comparing scan result data against a threshold value (e.g., in an auto-scan mode); generating row count; selecting one or more scanning frequency bands; power management control; and performing an auto-scan routine in a low power mode.

公开(公告)号：US20180095560A1

公开(公告)日：2018-04-05

申请号：US15821135

申请日：2017-11-22

Applicant: Apple Inc.

Inventor： Steven P. HOTELLING ,  Christoph H. KRAH

IPC: G06F3/044 ,  G06F3/041 ,  G06F3/02 ,  G06F3/01 ,  G06F1/32 ,  G06F3/0488 ,  G06F3/042

Abstract: The use of one or more proximity sensors in combination with one or more touch sensors in a multi-touch panel to detect the presence of a finger, body part or other object and control or trigger one or more functions in accordance with an “image” of touch provided by the sensor outputs is disclosed. In some embodiments, one or more infrared (IR) proximity sensors can be driven with a specific stimulation frequency and emit IR light from one or more areas, which can in some embodiments correspond to one or more multi-touch sensor “pixel” locations. The reflected IR signal, if any, can be demodulated using synchronous demodulation. In some embodiments, both physical interfaces (touch and proximity sensors) can be connected to analog channels in the same electrical core.

公开(公告)号：US20180059870A1

公开(公告)日：2018-03-01

申请号：US15674232

申请日：2017-08-10

Applicant: Apple Inc.

Inventor： Christoph H. KRAH

IPC: G06F3/041 ,  G06F3/044 ,  H03G3/20 ,  H03K17/96 ,  H03K17/955

CPC classification number: G06F3/0418 ,  G06F3/044 ,  G06F2203/04108 ,  H03G3/20 ,  H03K17/955 ,  H03K17/962 ,  H03K2217/96074

Abstract: An analog front end (AFE) can be implemented with automatic variable gain control for self-capacitance based touch- and proximity-sensitive touch sensor panels or touch screens. The AFE can include a charge amplifier and an oversampled analog-to-digital converter (ADC). The AFE can also include multiple signal paths between the charge amplifier and the ADC. The variable gain control can monitor the output of the oversampled ADC and, based on the oversampled ADC output, automatically select one of the multiple signal paths. When the output of the ADC indicates a proximity condition (e.g., relatively small signal, relatively large noise headroom when compared with a touch condition), the automatically selected signal path can amplify the charge amplifier output. The bit resolution of the oversampled ADC in the AFE can be relaxed as a result of the variable gain control.

公开(公告)号：US20170147119A1

公开(公告)日：2017-05-25

申请号：US15424712

申请日：2017-02-03

Applicant: Apple Inc.

Inventor： Steve Porter HOTELLING ,  Wei CHEN ,  Christoph H. KRAH ,  John Greer ELIAS ,  Wei Hsin YAO ,  John Z. ZHONG ,  Andrew Bert HODGE ,  Brian R. LAND ,  Willem den BOER

IPC: G06F3/041 ,  G02F1/1343 ,  G02F1/1335 ,  G06F3/044 ,  G02F1/1333

CPC classification number: G06F3/0412 ,  G02F1/13338 ,  G02F1/133514 ,  G02F1/133528 ,  G02F1/134309 ,  G02F1/134363 ,  G02F1/1362 ,  G02F2201/124 ,  G06F3/0416 ,  G06F3/044 ,  G06F2203/04103 ,  G06F2203/04104 ,  G06F2203/04111 ,  G06F2203/04112 ,  G09G3/3648 ,  G09G2300/0426 ,  G09G2300/0439 ,  G09G2300/0456 ,  G09G2300/0478

Abstract: Disclosed herein are liquid-crystal display (LCD) touch screens that integrate the touch sensing elements with the display circuitry. The integration may take a variety of forms. Touch sensing elements can be completely implemented within the LCD stackup but outside the not between the color filter plate and the array plate. Alternatively, some touch sensing elements can be between the color filter and array plates with other touch sensing elements not between the plates. In another alternative, all touch sensing elements can be between the color filter and array plates. The latter alternative can include both conventional and in-plane-switching (IPS) LCDs. In some forms, one or more display structures can also have a touch sensing function. Techniques for manufacturing and operating such displays, as well as various devices embodying such displays are also disclosed.

公开(公告)号：US20160378263A1

公开(公告)日：2016-12-29

申请号：US15261578

申请日：2016-09-09

Applicant: Apple Inc.

Inventor： Christoph H. KRAH ,  Steven P. HOTELLING ,  Marduke YOUSEFPOR

IPC: G06F3/041 ,  G02F1/1333 ,  H03K17/96 ,  G06F3/044

CPC classification number: G06F3/0418 ,  G02F1/13338 ,  G06F3/044 ,  G06F2203/04104 ,  H03K17/962 ,  H03K2217/960705

Abstract: Measuring an effect of body capacitance in a touch sensitive device is disclosed. This effect can be caused by poor grounding of a user or other objects touching the device or of the device itself. The device can operate in a stray capacitance mode to measure a body capacitance effect and in a normal mode to detect a touch on the device. During the stray capacitance mode, the device can obtain a body capacitance measurement from the device. During the normal mode, the device can obtain a touch measurement from the device. The device can calculate a body capacitance factor based on a ratio between the body capacitance measurement and the touch measurement and use the body capacitance factor to compensate for erroneous or distorted touch output values from the device. Various components of the device can be switchably configured according to the particular mode.

Abstract translation: 公开了测量触敏装置中的身体电容的影响。 这种效果可能是由于接触设备或设备本身的用户或其他对象的接地不良引起的。 器件可以在杂散电容模式下工作，以测量体电容效应，并在正常模式下检测器件上的触摸。 在杂散电容模式期间，器件可以从器件获得体电容测量值。 在正常模式下，设备可以从设备获得触摸测量。 该装置可以基于身体电容测量和触摸测量之间的比率来计算身体电容因数，并使用身体电容因子来补偿来自装置的错误或失真的触摸输出值。 可以根据特定模式切换配置设备的各种组件。

公开(公告)号：US20160320898A1

公开(公告)日：2016-11-03

申请号：US15089432

申请日：2016-04-01

Applicant: Apple Inc.

Inventor： Howard TANG ,  Christoph H. KRAH ,  Paolo SACCHETTO ,  Chaohao WANG

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G02F1/13338 ,  G06F3/0412 ,  G06F3/0418 ,  G06F3/044 ,  G09G3/00 ,  G09G3/3655 ,  G09G3/3677 ,  G09G2310/0291

Abstract: A system is disclosed. The system can comprise dynamic drive circuitry configured to drive a plurality of electrodes on a touch screen. The system can also comprise a switching circuit configured to selectively couple the dynamic drive circuitry to one or more of the plurality of electrodes. The system can also comprise a display circuitry configured to selectively update a plurality of display pixels on the touch screen. The dynamic drive circuitry can be configured to set its output based on which of the plurality of electrodes are selectively coupled to the first drive circuitry and which of the display pixels are updated by the display circuitry.

Abstract translation: 公开了一种系统。 该系统可以包括被配置为在触摸屏上驱动多个电极的动态驱动电路。 该系统还可以包括被配置为选择性地将动态驱动电路耦合到多个电极中的一个或多个的开关电路。 该系统还可以包括被配置为选择性地更新触摸屏上的多个显示像素的显示电路。 动态驱动电路可以被配置为基于多个电极中的哪一个选择性地耦合到第一驱动电路并且由显示电路更新哪个显示像素来设置其输出。

公开(公告)号：US20160179281A1

公开(公告)日：2016-06-23

申请号：US15057035

申请日：2016-02-29

Applicant: Apple Inc.

Inventor： Christoph H. KRAH ,  Shahrooz SHAHPARNIA ,  Steven P. HOTELLING

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/047 ,  G06F3/038 ,  G06F3/0354

CPC classification number: G06F3/0416 ,  G06F3/03545 ,  G06F3/0383 ,  G06F3/041 ,  G06F3/044 ,  G06F3/045 ,  G06F3/047

Abstract: A method for receiving data from an input device to a computing device through a touch interface. The method includes detecting an input device, synchronizing with the input device by receiving a position signal and activating an input device scan of the touch interface, receiving a data signal from the input device through at least one of a sense line or a drive line of the touch interface, and scanning the touch interface for a touch input by applying a stimulation signal to the at least one drive line and analyzing the at least one sense line.

Abstract translation: 一种通过触摸界面从输入设备接收数据到计算设备的方法。 该方法包括检测输入设备，通过接收位置信号和激活触摸界面的输入设备扫描与输入设备同步，通过至少一个感测线或驱动线从输入设备接收数据信号 触摸界面，以及通过将刺激信号施加到所述至少一个驱动线并分析所述至少一个感测线，来扫描触摸界面以进行触摸输入。