发明名称 |
Touch terminal with reliable pad selection |
摘要 |
A touch terminal identifies a single user-selectable, touch-responsive pad element on the display screen for user communication with a data processing system. The terminal makes the identification in response to the durations of pulse signals which vary according to the touch-selection condition of the pad elements. A multiple-step technique of repetitively measuring the signal durations relative to reference values attains essentially error-free pad selection. The operation includes the updating of the reference values of the pulse-signal durations.
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申请公布号 |
US4374381(A) |
申请公布日期 |
1983.02.15 |
申请号 |
US19810259614 |
申请日期 |
1981.05.01 |
申请人 |
INTERACTION SYSTEMS, INC. |
发明人 |
NG, HENRY H.;SCHMIDT, FREDERICK R. |
分类号 |
G06F3/033;G06F3/041;(IPC1-7):G06F3/14;G09F9/32 |
主分类号 |
G06F3/033 |
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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