发明名称 |
Apparatus for a stylus input system for shielding RFI/EMI fields |
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.
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申请公布号 |
US5486847(A) |
申请公布日期 |
1996.01.23 |
申请号 |
US19920994973 |
申请日期 |
1992.12.21 |
申请人 |
NCR CORPORATION |
发明人 |
RANF, KARL-HEINZ;PENROD, JACK R. |
分类号 |
G06F1/16;G06F1/18;G06F3/033;G06F3/044;(IPC1-7):G09G5/00 |
主分类号 |
G06F1/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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