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US 5,870,033 AGranted
Keyboard, in particular a membrane keyboard
OwnerLothar Stroloinventor
Life of this patent
Estimating the term…
Abstract
A keyboard system for activating equipment to be operated, including: a keyboard for generating activation signals, a wireless transmitter for wirelessly transmitting the activation signals; and a receiver connectable to the equipment to be operated for receiving the activation signals from the transmitter.
Claims26
A keyboard system for activating a network-compatible personal computer to be operated, comprising:
- a plurality of independent keyboards for generating activation signals, each of the keyboards having a keyboard address and including a key matrix that is scanable row-by-row and column-by-column;
- wireless transmitter means for wirelessly transmitting the activation signals as light pulses which lie in an infrared range, the transmitter means being operative to send data messages in which a keyboard address is contained, the transmitter means having a transmission channel for each key of the keyboard, the transmitter means being operative to transmit data messages in which the keyboard address is in each case contained;
- and
- receiver means connectable to the personal computer to be operated for receiving the activation signals from the transmitter means, the receiver means including an address decoder and an address comparator that passes on data received from the transmitter means to the personal computer if the data match a preset dedicated address, the receiver means further including an address decoder that is operative to pass on data received in accordance with the decoded address to an interface card of the personal computer assigned to this address.
1 more element
A keyboard system for activating a personal computer to be operated, comprising:
- a keyboard for generating activation signals, the keyboard including a key matrix that is scanable row by row and column by column;
- wireless transmitter means for wirelessly transmitting the activation signals as light pulses which lie in an infrared range, the transmitter means being operative to send data messages in which a keyboard address is contained, the transmitter means having a transmission channel for each key of the keyboard;
- receiver means connectable to the personal computer to be operated for receiving the activation signals from the transmitter means, the receiver means including an address decoder and an address comparator that passes on data received from the transmitter means to the personal computer if the data match a preset dedicated address;
- and
- a plurality of interface cards mountable in the personal computer and associated with respective addresses, the receiver means being operative to direct the data to an appropriate one of the interface cards.
2 more elements
A keyboard system for activating a personal computer to be operated, comprising:
- a keyboard for generating activation signals, the keyboard including a key matrix that is scanable row by row and column by column;
- wireless transmitter means for wirelessly transmitting the activation signals as light pulses which lie in an infrared range, the transmitter means being operative to send data messages in which a keyboard address is contained, the transmitter means having a transmission channel for each key of the keyboard;
- and
- receiver means connectable to the personal computer to be operated for receiving the activation signals from the transmitter means, the receiver means including an address decoder and an address comparator that passes on data received from the transmitter means to the personal computer if the data match a preset dedicated address, the receiver means including an automatically operating sensitivity setting element (AGC), the transmitter means being operative to transmit a 2-bit carrier, at a beginning of a data message, for the AGC setting of the receiver means.
1 more element
Dependencies are inferred from the claim text.