公开(公告)号：US08754867B2

公开(公告)日：2014-06-17

申请号：US13916357

申请日：2013-06-12

Applicant: Apple Inc.

Inventor： Christoph Horst Krah ,  Steve Porter Hotelling ,  Sean Erik O'Connor ,  Wayne Carl Westerman

IPC: G06F3/041 ,  G09G5/00

CPC classification number: G06F3/0416 ,  G02F1/13338 ,  G06F3/041 ,  G06F3/0412 ,  G06F3/0418 ,  G06F3/044 ,  G06F2203/04104

Abstract: The use of multiple stimulation frequencies and phases to generate an image of touch on a touch sensor panel is disclosed. Each of a plurality of sense channels can be coupled to a column in a touch sensor panel and can have multiple mixers. Each mixer in the sense channel can utilize a circuit capable generating a demodulation frequency of a particular frequency. At each of multiple steps, various phases of selected frequencies can be used to simultaneously stimulate the rows of the touch sensor panel, and the multiple mixers in each sense channel can be configured to demodulate the signal received from the column connected to each sense channel using the selected frequencies. After all steps have been completed, the demodulated signals from the multiple mixers can be used in calculations to determine an image of touch for the touch sensor panel at each frequency.

Abstract translation: 公开了使用多个刺激频率和相位以在触摸传感器面板上产生触摸图像。 多个感测通道中的每一个可以耦合到触摸传感器面板中的列并且可以具有多个混合器。 感测通道中的每个混频器可以利用能够产生特定频率的解调频率的电路。 在多个步骤中的每一个步骤中，可以使用选定频率的各个相位来同时刺激触摸传感器面板的行，并且每个感测通道中的多个混频器可以被配置为解调从连接到每个感测通道的列接收的信号，使用 所选频率。 所有步骤完成后，来自多个混音器的解调信号可用于计算，以确定每个频率下触摸传感器面板的触摸图像。