公开(公告)号：JP2000081610A

公开(公告)日：2000-03-21

申请号：JP22352999

申请日：1999-08-06

Applicant: IBM

Inventor： IVAN GEORGE COLGAN ,  JAMES LEWIS LEVIN ,  KURIHARA MIKIO ,  KARUBE SATOSHI ,  SAKAI KAZUMI ,  KANZAKI EISUKE ,  MISHIMA YUTAKA

IPC: G06F3/044 ,  G02F1/133 ,  G02F1/1333 ,  G02F1/136 ,  G06F3/041 ,  G09F9/00 ,  G06F3/03 ,  G06F3/033

Abstract: PROBLEM TO BE SOLVED: To reduce the weight and thickness of the device and to permit position detection with high sensitivity and high resolution by integrally providing a substrate or polarizing plate with a position detection conductive film of an analog capacitor coupling system. SOLUTION: A liquid crystal layer 12 is held between two sheets of glass; a substrate 8 and a substrate 18. The position detection conductive film 20 is disposed on either the front or rear surface of the polarizing plate 24 or the substrate 18 by integration therewith. When the position detection accuracy and the electrical influence on the liquid crystal layer 12 are taken into consideration, the position detection conductive film 20 is preferably disposed on the side nearer the polarizing plate 24 than an ITO film 14. More preferably, the position detection conductive film 20 is disposed between the polarizing plate 24 and the substrate 18. The use of the ITO film 14 which is a common electrode existing between the position detection conductive film 20 and a TFT array 10 as a noise shield is made possible and the position detection of the extremely high accuracy which hardly receives the influence of noise may be embodied.