Telegraphy – Systems – Position coordinate determination for writing
Patent
1993-02-22
1996-04-09
Chin, Stephen
Telegraphy
Systems
Position coordinate determination for writing
178 19, 178 20, 345156, 345158, G08C 2100, G09G 302
Patent
active
055063756
ABSTRACT:
A multilayer circuit board for a coordinate detecting apparatus has a sensor region having X-coordinate sensor lines which are equidistantly arranged in parallel and Y-coordinate sensor lines which are also equidistantly arranged in parallel; a processing circuit is in a periphery of the board. A first layer has signal lines which constitute the processing circuit. A second layer has grounded dummy sensor lines in a position corresponding to the signal lines on the first layer. The X and Y dummy sensor lines intersect to form mesh grounds on the second layer and cover the signal lines. Optionally, the mesh grounds are formed on a third layer, and the first layer is sandwiched between the second and third layers. The dummy sensor lines or the mesh grounds substantially block propagation of noise produced by the circuit board and help increase the size of the sensor region effective area.
REFERENCES:
patent: 4081603 (1978-03-01), Davis
patent: 4138592 (1979-02-01), Capehart
patent: 4210775 (1980-07-01), Rodgers
patent: 4477877 (1984-10-01), Nakamura
patent: 4582955 (1986-04-01), Blesser
patent: 4617515 (1986-10-01), Taguchi et al.
patent: 4649232 (1987-03-01), Nakamura
patent: 4679241 (1987-07-01), Lukis
patent: 4705919 (1987-11-01), Dhawan
patent: 4794209 (1988-12-01), Asada et al.
patent: 4795858 (1989-01-01), Yamazaki
patent: 4806708 (1989-02-01), Yahagi
patent: 4818851 (1989-04-01), Kimura
patent: 4878553 (1989-11-01), Yamanami et al.
patent: 4956526 (1990-09-01), Murakami
patent: 4959805 (1990-09-01), Ohouchi et al.
patent: 4988837 (1991-01-01), Murakami et al.
patent: 5231381 (1993-07-01), Duwaer
Chin Stephen
Shankar Vijay
Wacom Co. Ltd.
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