公开(公告)号：US20070057048A1

公开(公告)日：2007-03-15

申请号：US11223890

申请日：2005-09-09

Applicant: Serge Plotkin ,  Hristo Bojinov

Inventor： Serge Plotkin ,  Hristo Bojinov

IPC: G06K5/00 ,  G06F17/30 ,  H04L9/00

CPC classification number: G06F21/62 ,  G06F21/78 ,  H04L63/0428 ,  H04L63/101 ,  Y10S707/99939

Abstract: Embodiments of methods and/or systems to authorize access to stored data are disclosed.

Abstract translation: 公开了授权访问存储的数据的方法和/或系统的实施例。

公开(公告)号：US6118205A

公开(公告)日：2000-09-12

申请号：US134315

申请日：1998-08-13

Applicant: Robert P. Wood ,  Serge Plotkin ,  Jacob Harel ,  Alfred Samson Hou

Inventor： Robert P. Wood ,  Serge Plotkin ,  Jacob Harel ,  Alfred Samson Hou

IPC: G06F3/033 ,  G06F3/043 ,  H01L41/08

CPC classification number: G06F3/043 ,  G06F3/03545

Abstract: A transducer signal waveshaping system is provided, in which a signal excitation circuit includes a non-linear device. The resulting circuit produces a short input pulse, which allows a piezoelectric transducer to transmit a shortened output signal having distinct waveshape characteristics. The resulting waveshaped output signal, typically an ultrasonic signal, provides a measurable time-dependent signal that is particularly suited for data entry systems, such as for movable transmitter pens and white boards. The location of the transmitter pen in relation to the writing area of a white board can be determined, using the periodic transmission of the waveshaped output signals. Alternative embodiments include additional circuit elements, which allow the resulting waveshaped output signal to include even more distinctive waveform features. The distinctive waveform features allow the transmitter pen to be located even more accurately, and provide a means for transferring supplementary information, such as pen up vs. pen down distinction, and determined pen characteristics, such as pen color, pen line width, and pen user.

Abstract translation: 提供了一种换能器信号波形整形系统，其中信号激励电路包括非线性装置。 所产生的电路产生短的输入脉冲，其允许压电换能器传输具有不同波形特性的缩短的输出信号。 所产生的波形输出信号（通常是超声波信号）提供特别适用于诸如可移动发射器笔和白板的数据输入系统的可测量的时间相关信号。 可以使用波形输出信号的周期性传输来确定发射器笔相对于白板的写入区域的位置。 替代实施例包括额外的电路元件，其允许所得到的波形输出信号包括更加独特的波形特征。 独特的波形特征允许发射笔更准确地定位，并且提供用于传送补充信息的手段，例如笔对与笔下的区别，以及确定的笔特征，例如笔颜色，笔线宽度和笔 用户。