Touch screen

G - Physics – 06 – F

Patent

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Details

G06F 3/023 (2006.01) G06F 3/033 (2006.01) G09G 5/00 (2006.01)

Patent

CA 2278512

A touch screen of the voltage-divider type is provided which includes two substrates (122, 124) spaced apart from each other by a gap, each substrate including a region formed of conductive material formed in overlapping relationship to each other. A pair of strips (50, 130 and 52, 138) formed from a resistive material is coupled to opposed edges of each conductive region such that the resistance strips (50, 130) of the first substrate (122) extending in a substantially perpendicular direction to the resistance strips (52 and 138) of said the second substrate (124). A circuit (142) is provided which applies a first reference voltage across the resistance strips (50, 130) of the first substrate (122), and subsequently applies a second reference voltage across the resistance strips (52, 138) of the second substrate (124).

L'invention concerne un écran tactile du type diviseur de tension qui comprend deux substrats (122, 124) séparés entre eux par un espace, chaque substrat comprenant une région fabriquée en matériau conducteur, chacune de ces régions étant fabriquée dans une relation de superposition avec l'autre région. Deux bandes (50, 130 et 52, 138) fabriquées en matériau résistant sont couplées à des bords opposés de chaque région conductrice de façon à ce que les bandes de résistance (50, 130) du premier substrat (122) se trouvent dans une position sensiblement perpendiculaire aux bandes de résistance (52, 138) du second substrat (124). L'invention concerne également un circuit (142) qui applique une première tension de référence à travers les bandes de résistance (50, 130) du premier substrat (122) et, ultérieurement, applique une seconde tension de référence à travers les bandes de résistance (52, 138) du second substrat (124).

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