Detecting key actuation in a keyboard

Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad

Reexamination Certificate

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C200S0050EA, C200S344000

Reexamination Certificate

active

08031087

ABSTRACT:
A system and method for detecting key actuation in a keyboard assembly, which, in one embodiment, is used as a conductor to electrically communicate with an information appliance. The rows in the keyboard assembly are electrically isolated from one another, and each row contains keys bridging a two-wire bus. Each key has a switch that is closed during key actuation, a diode to polarize the key, and a resistor to provide a resistive load when the switch is closed and the diode is biased with the current flow. Alternatively, each key has a switch that is closed during key actuation, a timer with an output that goes high after a predetermined time period, and a resistor that provides an identifying load when the switch is closed and the output of the timer is high. Other features of the invention include a linear matrix coupled to a row of keys to allow the row to be scanned by sections and individual keys, and a flexible circuit that provides the electrical pathways for the linear matrix.

REFERENCES:
patent: 3499515 (1970-03-01), Mikrut
patent: 3574335 (1971-04-01), Ricke
patent: 3576569 (1971-04-01), Watson
patent: 3693123 (1972-09-01), Pedersen
patent: 3703040 (1972-11-01), Hill
patent: 3893559 (1975-07-01), Hishida et al.
patent: 3940758 (1976-02-01), Margolin
patent: 4066850 (1978-01-01), Heys, Jr.
patent: 4092527 (1978-05-01), Luecke
patent: 4336530 (1982-06-01), Koike et al.
patent: 4366463 (1982-12-01), Barker
patent: 4368364 (1983-01-01), Harbers, Jr.
patent: 4517660 (1985-05-01), Fushimoto et al.
patent: 4560844 (1985-12-01), Takamura et al.
patent: 4633227 (1986-12-01), Menn
patent: 4638151 (1987-01-01), Suwa
patent: 4661005 (1987-04-01), Lahr
patent: RE32419 (1987-05-01), Rooney
patent: 4735520 (1988-04-01), Suzuki et al.
patent: 4818828 (1989-04-01), Curley et al.
patent: 4839474 (1989-06-01), Hayes-Pankhurst et al.
patent: 4885430 (1989-12-01), Kinser, Jr. et al.
patent: 4885891 (1989-12-01), Lynch
patent: 4914999 (1990-04-01), Masubuchi et al.
patent: 4939514 (1990-07-01), Miyazaki
patent: 4942700 (1990-07-01), Hoberman
patent: 4996522 (1991-02-01), Sunano
patent: 5024031 (1991-06-01), Hoberman
patent: 5044798 (1991-09-01), Roylance et al.
patent: 5057836 (1991-10-01), Inaba
patent: 5070330 (1991-12-01), Wu
patent: 5122786 (1992-06-01), Rader
patent: 5137384 (1992-08-01), Spencer et al.
patent: 5141343 (1992-08-01), Roylance et al.
patent: 5163765 (1992-11-01), Levy
patent: 5164723 (1992-11-01), Nebenzahl
patent: 5167100 (1992-12-01), Krishnapillai
patent: 5187644 (1993-02-01), Crisan
patent: 5198991 (1993-03-01), Pollitt
patent: 5210846 (1993-05-01), Lee
patent: 5212473 (1993-05-01), Louis
patent: 5227615 (1993-07-01), Oogita
patent: 5252971 (1993-10-01), Franz et al.
patent: 5267127 (1993-11-01), Pollitt
patent: 5287245 (1994-02-01), Lucente et al.
patent: 5329079 (1994-07-01), English et al.
patent: 5329084 (1994-07-01), Watanabe et al.
patent: 5341154 (1994-08-01), Bird
patent: 5383138 (1995-01-01), Motoyama et al.
patent: 5394959 (1995-03-01), Cullity et al.
patent: 5398326 (1995-03-01), Lee
patent: 5398585 (1995-03-01), Starr
patent: 5422447 (1995-06-01), Spence
patent: 5424728 (1995-06-01), Goldstein
patent: 5454652 (1995-10-01), Huellemeier et al.
patent: 5457453 (1995-10-01), Chiu et al.
patent: 5466901 (1995-11-01), Mochizuki
patent: 5476332 (1995-12-01), Cleveland, Jr.
patent: 5481074 (1996-01-01), English
patent: 5502460 (1996-03-01), Bowen
patent: 5504283 (1996-04-01), Kako et al.
patent: 5508700 (1996-04-01), Taylor et al.
patent: 5512719 (1996-04-01), Okada et al.
patent: 5519569 (1996-05-01), Sellers
patent: 5532904 (1996-07-01), Sellers
patent: 5543787 (1996-08-01), Karidis et al.
patent: 5543790 (1996-08-01), Goldstein
patent: 5555971 (1996-09-01), Takada
patent: 5557057 (1996-09-01), Starr
patent: 5574481 (1996-11-01), Lee
patent: 5575576 (1996-11-01), Roysden, Jr.
patent: 5587875 (1996-12-01), Sellers
patent: 5588759 (1996-12-01), Cloud
patent: 5590020 (1996-12-01), Sellers
patent: 5591927 (1997-01-01), Kawamura et al.
patent: 5596480 (1997-01-01), Manser et al.
patent: 5602715 (1997-02-01), Lempicki et al.
patent: 5612691 (1997-03-01), Murmann et al.
patent: 5621610 (1997-04-01), Moore et al.
patent: 5635928 (1997-06-01), Takagi et al.
patent: 5644338 (1997-07-01), Bowen
patent: 5646817 (1997-07-01), Manser et al.
patent: 5648771 (1997-07-01), Halgren et al.
patent: 5653543 (1997-08-01), Abe
patent: 5654872 (1997-08-01), Sellers
patent: 5659307 (1997-08-01), Karidis et al.
patent: 5677826 (1997-10-01), Sellers
patent: 5687058 (1997-11-01), Roylance
patent: 5695047 (1997-12-01), Tanahashi
patent: 5703578 (1997-12-01), Allison
patent: 5706167 (1998-01-01), Lee
patent: 5712760 (1998-01-01), Coulon et al.
patent: 5733056 (1998-03-01), Meagher
patent: 5735390 (1998-04-01), Takagi et al.
patent: 5746308 (1998-05-01), Lin
patent: 5748114 (1998-05-01), Koehn
patent: 5763842 (1998-06-01), Tsai et al.
patent: 5769210 (1998-06-01), Tsai
patent: 5770824 (1998-06-01), Tsai et al.
patent: 5774384 (1998-06-01), Okaya et al.
patent: 5788386 (1998-08-01), Hayashi et al.
patent: 5800085 (1998-09-01), Lee
patent: 5819914 (1998-10-01), Yoneyama
patent: 5823325 (1998-10-01), Lin
patent: 5841635 (1998-11-01), Sadler et al.
patent: 5870034 (1999-02-01), Wood
patent: 5933320 (1999-08-01), Malhi
patent: 5986227 (1999-11-01), Hon
patent: 6137676 (2000-10-01), Merkel
patent: 6181262 (2001-01-01), Bennett
patent: 6331850 (2001-12-01), Olodort et al.
patent: 6563434 (2003-05-01), Olodort et al.
patent: 7084787 (2006-08-01), Olodort et al.
patent: 7782230 (2010-08-01), Olodort et al.
patent: 2002/0092750 (2002-07-01), Hsu et al.
patent: 2323331 (1998-09-01), None
patent: WO-99/31800 (1999-06-01), None
“Internet Shopping ‘Appliance’ Rolling Out,” by Michael Katz, Broadcasting Cable's Telemedia Week, v126, n16, Apr. 15, 1996, 2 pages.
“Keyboard Key to New Notebooks,” by Margaret Williamson, Computing Canada, Jul. 4, 1996, 2 pages [internet accessed on Jul. 23, 2009].
IBM Technical Disclosure Bulletin, “Briefcase-Portable Textwriter with 100-Key Full-Size Keyboard,” vol. 27, No. 4A, Sep. 1984, 3 pages, #2002-2004.
IBM Technical Disclosure Bulletin, “Compact Computer Keyboard,” vol. 27, No. 10A, Mar. 1985, 3 pages, #5640-5642.
IBM Technical Disclosure Bulletin, “Keyboard,” vol. 27, No. 4B, Sep. 1984, 1 page.
International Search Report of PCT application No. PCT/US98/24019, Apr. 20, 1999, 4 pages.
International Search Report of PCT application No. PCT/US98/24128, Mar. 31, 1999, 4 pages.

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