Patent Number: 6,670,949

Title: Digitizer

Abstract: An apparatus for locating a point physically touched and producing an electrical signal corresponding to the location includes an insulating substrate; a resistor touch pattern supported on the insulating substrate; and a protective insulating plate arranged over the resistive touch pattern. The resistive touch pattern has a plurality of strip resistors parallel to a center line; a plurality of linear resistors connected to the strip resistors, the resistance of the linear resistors decreasing with distance from the center line; first and third terminals positioned on an intermediate point of alternate edges of the touch pattern; and second and fourth terminals, positioned on an intermediate point of other alternate edges of the touch pattern. The resistive value of the linear resistors selected for a corresponding strip resistor so as to produce equal potential at a corresponding selected point on all said strip resistors.

Inventors: Ahn; Young-Soo (Kyonggi-do, KR), Jeong; Yun-Cheol (Seoul, KR), Oh; Young-Jin (Kyonggi-do, KR)

Assignee: LG. Philips LCD Co., Ltd.

International Classification: G06F 3/033 (20060101); G09G 005/00 ()

Expiration Date: 12/30/2020