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1. 发明授权

US5486847A Apparatus for a stylus input system for shielding RFI/EMI fields 失效
标题翻译：用于屏蔽RFI / EMI场的触笔输入系统的装置
公开(公告)号：US5486847A
公开(公告)日：1996-01-23
申请号：US994973
申请日：1992-12-21
申请人： Karl-Heinz Ranf , Jack R. Penrod
发明人： Karl-Heinz Ranf , Jack R. Penrod
IPC分类号： G06F1/16 , G06F1/18 , G06F3/033 , G06F3/044 , G09G5/00
CPC分类号： G06F3/044 , G06F1/1626 , G06F1/1656 , G06F1/1698 , G06F1/182
摘要： An apparatus for a pen-based input system, such as personal communication device or notepad computer, which shields against RFI/EMI fields causing problems either in the internal electronics or in the environment surrounding the system. A digitizer used in such a system must be able to sense a location of a special pen used for inputting information. This digitizer is also a source of RFI/EMI fields. A shield of such RFI/EMI fields must allow the digitizer to work and reduce the amount of RFI/EMI released to the environment. A special transparent conductive layer, such as a coating of Indium-Tin-Oxide, beneath the pen input protective plate performs these two necessary functions. The conductive layer also shields the system internal electronics from external RFI/EMI sources such as attached cellular telephone systems or radio LAN systems.
摘要翻译：一种用于基于笔的输入系统的设备，诸如个人通信设备或记事本计算机，其屏蔽RFI / EMI场，从而在内部电子设备或系统周围的环境中引起问题。在这种系统中使用的数字转换器必须能够感测用于输入信息的专用笔的位置。该数字化仪也是RFI / EMI领域的来源。这种RFI / EMI场的屏蔽必须允许数字化仪工作并减少向环境释放的RFI / EMI量。在笔输入保护板下方的特殊的透明导电层，例如铟锡氧化物涂层，执行这两个必要的功能。导电层还将系统内部电子器件与外部RFI / EMI源屏蔽，例如连接的蜂窝电话系统或无线电LAN系统。

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