公开(公告)号：US20160092010A1

公开(公告)日：2016-03-31

申请号：US14500653

申请日：2014-09-29

Applicant: Apple Inc.

Inventor： Manu AGARWAL ,  Christopher Tann ,  Brijesh Tripathi ,  Martin Paul Grunthaner

IPC: G06F3/041 ,  G09G5/18

CPC classification number: G06F3/0412 ,  G06F3/0416 ,  G06F2203/04105 ,  G09G5/12 ,  G09G2310/04 ,  G09G2330/022 ,  G09G2340/0435 ,  G09G2354/00

Abstract: Synchronization of display functions and various touch, stylus and/or force sensing functions for devices including a variable refresh rate (VRR) display is disclosed. In some examples, touch, stylus and/or force sensing functions can be synchronized with display frames and a display refresh rate can be adjusted by extended blanking of the display for one or more display frames. In other examples, touch, stylus and/or force sensing functions can be synchronized with display sub-frames and a display refresh rate can be adjusted by extended blanking of the display for one or more display sub-frames. Pre-warning synchronization signals can be generated to prepare one or more scan controllers to implement the appropriate scan events during and after extended blanking periods. Latency between the scan results and the corresponding image on the display can be corrected in software and/or firmware by time-stamping scan results or by dropping scan results from uncompleted scans.

Abstract translation: 公开了显示功能与用于包括可变刷新率（VRR）显示的设备的各种触摸，触笔和/或力感测功能的同步。 在一些示例中，触摸，触笔和/或力感测功能可以与显示帧同步，并且可以通过对一个或多个显示帧的显示器的扩展消隐来调整显示刷新率。 在其他示例中，触摸，触笔和/或力感测功能可以与显示子帧同步，并且可以通过对一个或多个显示子帧的显示器的扩展消隐来调整显示刷新率。 可以生成预警同步信号以准备一个或多个扫描控制器以在延长的消隐期间和之后实施适当的扫描事件。 扫描结果与显示器上的相应图像之间的延迟可以通过软件和/或固件通过时间戳扫描结果或通过从未完成的扫描中删除扫描结果进行校正。

公开(公告)号：US20170090668A1

公开(公告)日：2017-03-30

申请号：US14864351

申请日：2015-09-24

Applicant: Apple Inc.

Inventor： Manu AGARWAL ,  Jason C. HU ,  Dhaval PATEL ,  Shahrooz SHAHPARNIA ,  Sumant RANGANATHAN

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0418 ,  G06F3/0414 ,  G06F3/044 ,  G06F2203/04106

Abstract: Noise in sensor panel measurements can be reduced using a common pixel correction algorithm. Noise can be introduced into touch or force sensor panel measurements, for example, by circuitry of a transmit (Tx) section or a receive (Rx) section coupled to one or more sensing nodes of a sensor panel. For example, a digital-to-analog converter in the transmit section or an analog-to-digital converter in the receive section can introduce low-frequency correlated noise. Additionally, transmit and receive sections can introduce uncorrelated noise into the system. Reference nodes, coupled between Tx and Rx sections, can sense correlated and uncorrelated noise from the Tx and Rx sections. The noise measured at reference nodes can be subtract from signals measured at other sensing nodes coupled to the same Rx channel. The measurement at the reference node can be scaled using a scaling parameter to account for differences between reference nodes and sensing nodes.

公开(公告)号：US20160370915A1

公开(公告)日：2016-12-22

申请号：US14866797

申请日：2015-09-25

Applicant: Apple Inc.

Inventor： Manu AGARWAL ,  Hopil BAE ,  Kingsuk BRAHMA

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G06F3/044 ,  G09G3/00 ,  G09G3/2022 ,  G09G3/2096 ,  G09G2330/021 ,  G09G2340/0435

Abstract: Various timing schemes can be used to synchronizing display functions with touch and/or stylus sensing functions for devices including a variable refresh rate (VRR) display. In a continuous-touch mode, for example, extended blanking can result in frame judder due to mismatch or latency between reporting of sensing data and the display. To minimize these issues, sensing operations can reset to re-synchronize with the display operation, and unreported data from sensing scans can be discarded or ignored. In some examples, a display frame can be divided into two sub-frames, and a system can be configured to perform a touch sensing scan during the first sub-frame of a display frame. At the conclusion of extended blanking, the sensing operations can reset to re-synchronize with the display. The touch sensing scan can be completed in one intra-frame pause and can begin at the start of the display frame.

Abstract translation: 可以使用各种定时方案来将显示功能与用于包括可变刷新率（VRR）显示的设备的触摸和/或触控笔感测功能同步。 在连续触摸模式中，例如，由于在传感数据的报告和显示之间的不匹配或等待时间，扩展消隐可能导致帧抖动。 为了最小化这些问题，感测操作可以重置为与显示操作重新同步，并且可以丢弃或忽略来自感测扫描的未报告数据。 在一些示例中，显示帧可以被划分为两个子帧，并且系统可以被配置为在显示帧的第一子帧期间执行触摸感测扫描。 在延长消隐的结论中，感测操作可以重置为与显示器重新同步。 触摸感测扫描可以在一个帧内暂停中完成，并且可以在显示帧的开始处开始。