Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Patent
1993-11-10
1996-06-04
Peng, John K.
Coded data generation or conversion
Bodily actuated code generator
Including keyboard or keypad
341 20, 341 24, 341 25, 200 5A, 36470912, 400479, H03K 1794
Patent
active
055237550
ABSTRACT:
A n-key rollover keyboard having an application specific integrated circuit (ASIC) with a large number of pins, each pin directly connected to a key contact, with the other side of the key contact connected to ground. The direct wire arrangement allows use of a single sided circuit board. The keyboard has a reduced cost over prior n-key rollover designs by allowing removal of the series diodes and double sided circuit board.
REFERENCES:
patent: 3781874 (1973-12-01), Jennings
patent: 4459581 (1984-07-01), Wilson et al.
patent: 4684934 (1987-08-01), Small
patent: 4817010 (1989-03-01), Dobbins
patent: 4878056 (1989-10-01), Isoda et al.
patent: 4916275 (1990-04-01), Almond
patent: 4918445 (1990-04-01), Bower
patent: 5189416 (1993-02-01), Estes
Keytronics Corp., Schematic Diagram Of Keyboard For Compaq Computer Corp. Portable 386 Computer.
Keytronics Corp., Schematic Diagram Of Enhanced 101 Keyboard For Compaq Computer Corp. Computers. Jul. 30, 1986.
Advanced Input Devices, Schematic Diagram Of Enhanced Keyboard For Compaq Computer Corp. Portable 386 Computer. Dec. 24, 1987.
Advanced Input Devices, Schematic Diagram Of Enhanced 101 Keyboard For Compaq Computer Corp. Computers. Dec. 24, 1987.
Compaq Computer Corp.
Peng John K.
Wu Daniel J.
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