Patent ID: 6147313
Filing Date: 2000-11-14
Classification: G06F

Abstract:
A tablet device for use with an electronic input coordinate system, comprising:a first resistance membrane to detect a first coordinate;a second resistance membrane to detect a second coordinate;said first resistance membrane overlying said second resistance membrane;a first electrode coupled to said first resistance membrane;a second electrode coupled to said second resistance membrane;a first line coupled to said first electrode at one point and thereafter diverging into two lines including a first voltage supply line to supply voltage to said first resistance membrane and a first electrical potential monitor line to monitor an electrical potential of said first electrode;a second line coupled to said second electrode at one point and thereafter diverging into two lines including a second voltage supply line to supply voltage to said second resistance membrane and a second electrical potential monitor line to monitor an electrical potential of said second electrode;wherein when said first electrical potential monitor line of said first line monitors said electrical potential of said first electrode to detect an initial value of electrical potential of said first electrode, said first voltage supply line of said first line supplies voltage to said first resistance membrane;when said second electrical potential monitor line of said second line monitors said electrical potential of said second electrode to detect an initial value of electrical potential of said second electrode, said second voltage supply line of said second line supplies voltage to said second resistance membrane;when said first electrical potential monitor line of said first line monitors said electrical potential of said first electrode to detect said second coordinate, said second voltage supply line of said second line supplies voltage to said second resistance membrane; andwhen said second electrical potential monitor line of said second line monitors said electrical potential of said second electrode to detect said first coordinate, said first voltage supply line of said first line supplies voltage to said first resistance membrane.