Tablet with system power saving features including reactivation

Details Tablet with system power saving features including reactivation Tablet with system power saving features including reactivation

1996-10-21

1999-06-01

Ngo, Chuong Dinh

Boots, shoes, and leggings

39575003, 178 1901, G08C 2100

Patent

active

059093820

ABSTRACT:
A digitizing tablet has an improved operation for saving power. After an input device contacts the tablet surface, resistive sheets provide analog pen position signals to a sample/track and hold circuit. Once the signals are captured by the sample/track and hold, power is removed from the resistive sheets and digitization of the analog signals is performed. During an input waiting period, power is further conserved by removing power from the sample/track and hold and analog-to-digital converter, as a separate level detect circuit detects contact with the tablet surface by an input device.

REFERENCES:
patent: 5266750 (1993-11-01), Yatsuzuka
patent: 5324895 (1994-06-01), Inamori et al.
patent: 5384721 (1995-01-01), Joto
patent: 5396443 (1995-03-01), Mese et al.
patent: 5416726 (1995-05-01), Garcia-Duarte et al.
patent: 5423045 (1995-06-01), Kannan et al.
patent: 5568409 (1996-10-01), Neoh

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