EP 0377558 A4 19911113 - TOUCH SCREEN INPUT SYSTEM
Title (en)
TOUCH SCREEN INPUT SYSTEM
Publication
Application
Priority
- US 8702073 W 19870817
- US 81606586 A 19860103
Abstract (en)
[origin: WO8901677A1] A touch screen input system (10) for use with a display screen (12) having a photo-active display surface including a controllable sweeping beam. The system includes at least one photo-detector (20) in combination with detection circuitry for continuously registering the position of the beam in the display surface. A pointer (26) is adapted to reflect light from the beam to the photo-detector to provide a latch signal which is used to hold a signal identifying display screen location corresponding to pointer means location.
IPC 1-7
IPC 8 full level
G06F 3/037 (2013.01); G06F 3/042 (2006.01); G08C 21/00 (2006.01)
CPC (source: EP US)
G06F 3/037 (2013.01 - EP US); G06F 3/0421 (2013.01 - EP US); G06F 3/0428 (2013.01 - EP US)
Citation (search report)
- [X] US 3441722 A 19690429 - GLOESS PAUL FRANCOIS MARIE
- [A] US 4305071 A 19811208 - BELL STEVE W, et al
- See also references of WO 8901677A1
Designated contracting state (EPC)
AT BE DE FR GB IT NL SE
DOCDB simple family (publication)
US 4733022 A 19880322; WO 8901677 A1 19890223; EP 0377558 A1 19900718; EP 0377558 A4 19911113
DOCDB simple family (application)
US 81606586 A 19860103; US 8702073 W 19870817; EP 87905859 A 19870817