EP 1599789 A1 20051130 - TOUCH SCREEN SIGNAL PROCESSING
Title (en)
TOUCH SCREEN SIGNAL PROCESSING
Title (de)
BERÜHRUNGSSCHIRM-SIGNALVERARBEITUNG
Title (fr)
TRAITEMENT DU SIGNAL D'UN ECRAN TACTILE
Publication
Application
Priority
- NZ 2004000029 W 20040216
- NZ 52421103 A 20030214
Abstract (en)
[origin: WO2004072843A1] A touch screen (1) which uses light sources (4) at one or more edges of the screen (1) which directs light across the surface of the screen (1) and at least two cameras (6) having electronic outputs located at the periphery of the screen (1) to receive light from said light sources (4). A processor receives the outputs of said cameras (6) and employs triangulation techniques to determine the location of an object proximate to said screen (1). Detecting the presence of an object includes detecting at the cameras (6) the presence or absence of direct light due to the object, using a screen surface as a mirror and detecting at the cameras (6) the presence or absence of reflected light due to an object. The light sources (4) may be modulated to provide a frequency band in the output of the cameras (6).
IPC 1-7
IPC 8 full level
G06F 3/03 (2006.01); G06F 3/033 (2006.01); G06F 3/037 (2006.01); G06F 3/042 (2006.01)
CPC (source: EP KR)
G06F 3/03 (2013.01 - KR); G06F 3/0421 (2013.01 - EP)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004072843 A1 20040826; AU 2004211738 A1 20040826; AU 2004211738 B2 20070419; CA 2515955 A1 20040826; CA 2515955 C 20110111; CN 100468303 C 20090311; CN 1774692 A 20060517; EP 1599789 A1 20051130; EP 1599789 A4 20100331; JP 2006518076 A 20060803; JP 4668897 B2 20110413; KR 101035253 B1 20110519; KR 20050111324 A 20051124
DOCDB simple family (application)
NZ 2004000029 W 20040216; AU 2004211738 A 20040216; CA 2515955 A 20040216; CN 200480009926 A 20040216; EP 04711522 A 20040216; JP 2006502767 A 20040216; KR 20057014885 A 20040216