Touch panel input apparatus performing a sampling operation inte

Details Touch panel input apparatus performing a sampling operation inte Touch panel input apparatus performing a sampling operation inte

1995-06-06

1998-07-07

Lao, Lin-Yi

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

178 19, 364707, 345211, G09G 300

Patent

active

057776040

ABSTRACT:
A touch panel input apparatus has a touch panel which consists of X- and Y-direction electrode panels. When the apparatus is in a power-off state, one end of the X electrode panel is intermittently connected to a power source and one end of the Y electrode panel is intermittently grounded via an output resistor, in response to control signals outputted from a sampling circuit. In this state, synchronously with a clock signal, the sampling circuit performs sampling of a voltage developed across the output resistor when the two electrode panels are brought into contact. The sampling circuit outputs a power-on instruction signal to make the CPU perform the power-on operation. The sampling circuit stops its sampling operation once power is turned on.

REFERENCES:
patent: 5266750 (1993-11-01), Yatsuzuka
patent: 5371693 (1994-12-01), Nakazoe
patent: 5396443 (1995-03-01), Mese et al.
patent: 5496974 (1996-03-01), Akebi et al.
patent: 5568409 (1996-10-01), Neoh
IBM Technical Disclosure Bulletin, vol. 36, No. 1, Jan. 1993, New York, pp. 157-158, "Screen Programmable Power On Off Switch for Personal Computers".
Research Disclosure, No. 363, Jul. 1994, Havant GB, p. 15, "Computer Devise Start-Up".

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