公开(公告)号：US20170083152A1

公开(公告)日：2017-03-23

申请号：US14860364

申请日：2015-09-21

Applicant: Apple Inc.

Inventor： Alexandre GOUREVITCH ,  Albert LIN ,  Isaac CHAN ,  Martin Paul GRUNTHANER ,  Prathit BUGNAIT ,  Seyed Mohammad NAVIDPOUR ,  Sumant RANGANATHAN

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

CPC classification number: G06F3/0418 ,  G06F3/03545 ,  G06F3/0412 ,  G06F3/044 ,  G06F2203/04106

Abstract: Electrode configurations for reducing wobble error for a stylus translating on a surface of a touch sensor panel is disclosed. Electrodes associated with a more linear signal profile can correlate to lower wobble error. In some examples, electrodes can be configured such that the signal profile associated with each electrode is spread to be wider, and thus, more linear. In some configurations, electrodes can include two or more bars extending along the length of the electrode with each bar electrically connected to one another at one or both ends. Bars can be of non-uniform width or spacing. Some configurations can include a “split bar,” which can divide a bar lengthwise in order to improve optical uniformity. In some examples, electrodes can include projections which can interleave with corresponding projections in adjacent electrodes.

公开(公告)号：US20170293372A1

公开(公告)日：2017-10-12

申请号：US15485698

申请日：2017-04-12

Applicant: Apple Inc.

Inventor： Leah GUM ,  Wayne C. WESTERMAN ,  Seyed Mohammad NAVIDPOUR ,  Shahrooz SHAHPARNIA

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

CPC classification number: G06F3/044 ,  G06F3/0418 ,  G06F2203/04104

Abstract: In one aspect, the present disclosure relates to a method including determining which sense lines are potentially corrupted based on touch image information, measuring a sense signal on each sense line, and applying a trained best compensation factor to the measured sense signal on potentially corrupted sense lines in order to produce a corrected sense signal. The corrected sense signal eliminates active stylus signal that has cross-coupled to a touch contact (e.g., a finger or conductive stylus) and thereby mitigates errors in stylus location due to cross-coupled signal.

公开(公告)号：US20170068330A1

公开(公告)日：2017-03-09

申请号：US14964514

申请日：2015-12-09

Applicant: Apple Inc.

Inventor： Seyed Mohammad NAVIDPOUR ,  Apexit SHAH ,  Wayne Carl WESTERMAN

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

CPC classification number: G06F3/03545 ,  G06F3/0418 ,  G06F3/044

Abstract: Pre-processing can be applied to raw signal measurements resulting from stimulation from an input device, such as an active stylus, having a non-linear signal profile. The pre-processing can include a non-linear transformation, which can linearize the signal profile and thereby reduce wobble resulting from location detection algorithms. The transformation can be selected based on the signal profile for the stylus and the ideal profile for the location detection algorithms. In some examples, the transformation can be applied to linearize the entire signal profile, but in other examples, the non-linear transformation can be applied only to specific regions of the signal profile. The pre-processing can also discard raw signal measurements that are at least a threshold distance from the peak signal measurement or raw signal measurements below a threshold signal level. Pre-processing raw signal measurements before detecting location can reduce wobble across a range of stimulation frequencies and stylus orientations.

Abstract translation: 预处理可以应用于从具有非线性信号轮廓的输入装置（例如有源手写笔）的刺激导致的原始信号测量。 预处理可以包括非线性变换，其可以线性化信号分布，从而减少由位置检测算法产生的摆动。 可以基于用于触控笔的信号轮廓和位置检测算法的理想轮廓来选择变换。 在一些示例中，可以将变换应用于将整个信号分布线性化，但在其他示例中，非线性变换可以仅应用于信号分布的特定区域。 预处理还可以丢弃与峰值信号测量或原始信号测量之间至少阈值距离低于阈值信号电平的原始信号测量。 在检测位置之前预处理原始信号测量可以减少刺激频率和触针取向范围内的摆动。