EP 2047308 A4 20101124 - MULTI-TOUCH SENSING DISPLAY THROUGH FRUSTRATED TOTAL INTERNAL REFLECTION
Title (en)
MULTI-TOUCH SENSING DISPLAY THROUGH FRUSTRATED TOTAL INTERNAL REFLECTION
Title (de)
MEHRFACHBERÜHRUNGSDISPLAY DURCH VERHINDERTE INTERNE GESAMTREFLEXION
Title (fr)
DISPOSITIF D'AFFICHAGE À DÉTECTION À TOUCHES MULTIPLES PAR L'INTERMÉDIAIRE DE RÉFLEXION INTERNE TOTALE FRUSTRÉE
Publication
Application
Priority
- US 2007075221 W 20070803
- US 82132506 P 20060803
Abstract (en)
[origin: WO2008017077A2] High-resolution, scalable multi-touch sensing display systems and processes based on frustrated total internal reflection employ an optical waveguide (12, 32, 42, 62, 76, 84) that receives light, such as infrared light, that undergoes total internal reflection and an imaging sensor (20, 50, 72a, 72b, 72c, 86, 104a, 104b) that detects light that escapes the optical waveguide (12, 32, 42, 62, 76, 84) caused by frustration of the total internal reflection due to contact by a user. The optical waveguide (12, 32, 42, 62, 76, 84) may be fitted with a compliant surface overlay (48, 64, 78, 88) to greatly improve sensing performance, minimize the affect of contaminants on and damage to the contact surface, to generally extend system life and to provide other benefits. The systems and processes provide true multi-touch (multi-input) and high- spatial and temporal resolution capability due to the continuous imaging of the frustrated total internal reflection that escapes the entire optical waveguide (12, 32, 42, 62, 76, 84). Among other features and benefits, the systems and processes are scalable to large installations and are well suited for use with rear-projection (22, 52, 74a, 74b, 74c) and other display devices.
IPC 8 full level
G02B 6/00 (2006.01); G02B 6/10 (2006.01); G02B 6/26 (2006.01); G06F 3/041 (2006.01); G06F 3/042 (2006.01)
CPC (source: EP KR)
G02B 6/122 (2013.01 - KR); G02B 6/26 (2013.01 - KR); G06F 3/0304 (2013.01 - KR); G06F 3/0412 (2013.01 - KR); G06F 3/04166 (2019.04 - KR); G06F 3/0425 (2013.01 - EP KR); G06F 2203/04104 (2013.01 - KR); G06F 2203/04109 (2013.01 - EP KR)
Citation (search report)
- [Y] US 2005174646 A1 20050811 - COWAN JAMES [US], et al
- [Y] US 4484179 A 19841120 - KASDAY LEONARD R [US]
- [X] US 2003210537 A1 20031113 - ENGELMANN HARRY [DE]
- [A] US 5942761 A 19990824 - TULI RAJA SINGH [CA]
- [AP] US 2006227120 A1 20061012 - EIKMAN ADAM [US]
- [A] US 2004071417 A1 20040415 - VELIGDAN JAMES T [US]
- [XYI] JEFFERSON Y. HAN: "Low-Cost Multi-Touch Sensing through Frustrated Total Internal Reflection", 27 October 2005 (2005-10-27) - 1 September 2010 (2010-09-01), pages 115 - 118, XP002598826, Retrieved from the Internet <URL:http://delivery.acm.org/10.1145/1100000/1095054/p115-han.pdf?key1=1095054&key2=0998613821&coll=GUIDE&dl=GUIDE&CFID=99856286&CFTOKEN=30876719> [retrieved on 20100901]
- [Y] ANDREAS M. KUNZ AND CHRISTIAN P. SPAGNO: "Technical system for collaborative work.", vol. 23, 2002 - 1 September 2010 (2010-09-01), The Eurographics Association 2002., pages 73 - 80, XP002598827, Retrieved from the Internet <URL:http://delivery.acm.org/10.1145/510000/509722/p73-kunz.pdf?key1=509722&key2=0615423821&coll=GUIDE&dl=GUIDE&CFID=99966734&CFTOKEN=88553563> [retrieved on 20100901]
- [Y] MARKUS GROSS: "blue-c: a spatially immersive display and 3D video portal for telepresence", 2003 - 1 September 2010 (2010-09-01), pages 819 - 827, XP002598828, Retrieved from the Internet <URL:http://portal.acm.org/citation.cfm?id=1201775.882350> [retrieved on 20100901]
- See references of WO 2008017077A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2008017077 A2 20080207; WO 2008017077 A3 20081218; WO 2008017077 A4 20090219; EP 2047308 A2 20090415; EP 2047308 A4 20101124; JP 2009545828 A 20091224; KR 20090060283 A 20090611
DOCDB simple family (application)
US 2007075221 W 20070803; EP 07813780 A 20070803; JP 2009523076 A 20070803; KR 20097004408 A 20090302