公开(公告)号：DE3886643D1

公开(公告)日：1994-02-10

申请号：DE3886643

申请日：1988-06-21

Applicant: IBM

Inventor： GARWIN RICHARD LAWRENCE ,  LEVINE JAMES LEWIS LEVINE JAME

IPC: G06F3/042 ,  G06F3/033 ,  G06F3/041 ,  G06F3/048 ,  G06K11/08

Abstract: User-machine interaction through a touch input display screen is enhanced through the use of surface coding in the form of stylus diameter or reflectivity peripheral surface features that are sensed in optical sensing apparatus.

公开(公告)号：DE3886643T2

公开(公告)日：1994-06-23

申请号：DE3886643

申请日：1988-06-21

Applicant: IBM

Inventor： GARWIN RICHARD LAWRENCE ,  LEVINE JAMES LEWIS LEVINE JAME

IPC: G06F3/042 ,  G06F3/033 ,  G06F3/041 ,  G06F3/048 ,  G06K11/08

Abstract: User-machine interaction through a touch input display screen is enhanced through the use of surface coding in the form of stylus diameter or reflectivity peripheral surface features that are sensed in optical sensing apparatus.