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公开(公告)号：AU3268684A
公开(公告)日：1985-04-26
申请号：AU3268684
申请日：1984-09-04
Applicant: IBM
Inventor： BEAVERS JOHN ANDREW
IPC: H04B10/00 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/26 , H04B10/43 , H04B17/00 , G06F3/02 , H04B9/00
Abstract: In a remote battery operated keyboard entry device coupled to a microcomputer (1) through an infra-red link, the drive transistor (10, 17) for an infra-red LED (5) is coupled to receive serial pulses representing keystrokes through a network including a visible LED (14). The arrangement is such that for each input pulse, the visible LED is turned on to provide a visible transmission indication and also an input reference potential to determine the amplitude of the current drive of the transistor through the infra-red LED to guard against data loss caused by battery droop.
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公开(公告)号：GB2144940A
公开(公告)日：1985-03-13
申请号：GB8416922
申请日：1984-07-03
Applicant: IBM
Inventor： BEAVERS JOHN ANDREW
IPC: H04B10/00 , G06F1/00 , G06F3/02 , G06F3/023 , G08C23/00 , H04L25/49 , H04L25/493 , H04Q9/00 , H04B9/00
Abstract: A battery powered keyboard entry device (1) includes an infra- red generator for coupling the device to a processor (2) which includes an infrared receiver. Each input binary signal (A) is transmitted as a few (e.g. two or three) short infra-red pulses (D) indicating the leading edge of the binary signal. In the receiver, the receiving groups of pulses, after detection and amplification, are stretched by a single-shot circuit (22) to produce binary signals of substantially the same length as the original binary signals. As each transmission is substantially shorter than each binary signal, power consumption in the keyboard entry device is substantially reduced as compared with a system in which the infra-red pulses for each input signal extend over the input signal length.
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公开(公告)号：AT70374T
公开(公告)日：1991-12-15
申请号：AT84107806
申请日：1984-07-05
Applicant: IBM
Inventor： BEAVERS JOHN ANDREW
Abstract: A battery powered keyboard entry device (1) includes an infra-red generator (14,15) for coupling the device to a processor (2) which includes an infra-red receiver (20). Each input binary signal is transmitted as a few (e.g. two or three) short infra-red pulses indicating the leading edge of the binary signal. In the receiver, the received groups of pulses, after detection and amplification, are stretched by a single-shot circuit (22) to produce binary signals of substantially the same length as the original binary signals. As each transmission is substantially shorter than each binary signal, power consumption in the keyboard entry device is substantially reduced as compared with a system in which the infra-red pulses for each input signal extend over the input signal length.
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Patent Agency Ranking
公开(公告)号：MX157598A
公开(公告)日：1988-12-02
申请号：MX20227484
申请日：1984-08-06
Applicant: IBM
Inventor： BEAVERS JOHN ANDREW
IPC: H04B10/00 , G06F1/00 , G06F3/02 , G06F3/023 , G08C23/00 , H04L25/49 , H04L25/493 , H04Q9/00 , G06F13/28
Abstract: A battery powered keyboard entry device (1) includes an infra-red generator (14,15) for coupling the device to a processor (2) which includes an infra-red receiver (20). Each input binary signal is transmitted as a few (e.g. two or three) short infra-red pulses indicating the leading edge of the binary signal. In the receiver, the received groups of pulses, after detection and amplification, are stretched by a single-shot circuit (22) to produce binary signals of substantially the same length as the original binary signals. As each transmission is substantially shorter than each binary signal, power consumption in the keyboard entry device is substantially reduced as compared with a system in which the infra-red pulses for each input signal extend over the input signal length.
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公开(公告)号：HK63092A
公开(公告)日：1992-08-28
申请号：HK63092
申请日：1992-08-20
Applicant: IBM
Inventor： BEAVERS JOHN ANDREW
Abstract: A battery powered keyboard entry device (1) includes an infra-red generator (14,15) for coupling the device to a processor (2) which includes an infra-red receiver (20). Each input binary signal is transmitted as a few (e.g. two or three) short infra-red pulses indicating the leading edge of the binary signal. In the receiver, the received groups of pulses, after detection and amplification, are stretched by a single-shot circuit (22) to produce binary signals of substantially the same length as the original binary signals. As each transmission is substantially shorter than each binary signal, power consumption in the keyboard entry device is substantially reduced as compared with a system in which the infra-red pulses for each input signal extend over the input signal length.
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公开(公告)号：BR8405229A
公开(公告)日：1985-08-27
申请号：BR8405229
申请日：1984-10-16
Applicant: IBM
Inventor： BEAVERS JOHN ANDREW
Abstract: In a remote battery operated keyboard entry device coupled to a microcomputer (1) through an infra-red link, the drive transistor (10, 17) for an infra-red LED (5) is coupled to receive serial pulses representing keystrokes through a network including a visible LED (14). The arrangement is such that for each input pulse, the visible LED is turned on to provide a visible transmission indication and also an input reference potential to determine the amplitude of the current drive of the transistor through the infra-red LED to guard against data loss caused by battery droop.
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公开(公告)号：DE3485334D1
公开(公告)日：1992-01-23
申请号：DE3485334
申请日：1984-07-05
Applicant: IBM
Inventor： BEAVERS JOHN ANDREW
Abstract: A battery powered keyboard entry device (1) includes an infra-red generator (14,15) for coupling the device to a processor (2) which includes an infra-red receiver (20). Each input binary signal is transmitted as a few (e.g. two or three) short infra-red pulses indicating the leading edge of the binary signal. In the receiver, the received groups of pulses, after detection and amplification, are stretched by a single-shot circuit (22) to produce binary signals of substantially the same length as the original binary signals. As each transmission is substantially shorter than each binary signal, power consumption in the keyboard entry device is substantially reduced as compared with a system in which the infra-red pulses for each input signal extend over the input signal length.
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10.发明专利
公开(公告)号：PH24697A
公开(公告)日：1990-10-01
申请号：PH30927
申请日：1984-07-06
Applicant: IBM
Inventor： BEAVERS JOHN ANDREW
IPC: H04B10/00 , G06F1/00 , G06F3/02 , G06F3/023 , G08C23/00 , H04L25/49 , H04L25/493 , H04Q9/00 , H04B10/08
Abstract: A battery powered keyboard entry device (1) includes an infra-red generator (14,15) for coupling the device to a processor (2) which includes an infra-red receiver (20). Each input binary signal is transmitted as a few (e.g. two or three) short infra-red pulses indicating the leading edge of the binary signal. In the receiver, the received groups of pulses, after detection and amplification, are stretched by a single-shot circuit (22) to produce binary signals of substantially the same length as the original binary signals. As each transmission is substantially shorter than each binary signal, power consumption in the keyboard entry device is substantially reduced as compared with a system in which the infra-red pulses for each input signal extend over the input signal length.
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