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Machine translation
1. (WO1997040482) TOUCH AND PRESSURE SENSING METHOD AND APPARATUS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1997/040482    International Application No.:    PCT/US1997/006775
Publication Date: 30.10.1997 International Filing Date: 21.04.1997
Chapter 2 Demand Filed:    24.11.1997    
IPC:
G06F 3/033 (2006.01)
Applicants: LOGITECH, INC. [US/US]; 6505 Kaiser Drive, Fremont, CA 94555 (US) (For All Designated States Except US).
KASSER, Bernard [CH/US]; (US) (For US Only)
Inventors: KASSER, Bernard; (US)
Agent: HAUGHEY, Paul, C.; Townsend and Townsend and Crew L.L.P., 8th floor, Two Embarcadero Center, San Francisco, CA 94111-3834 (US)
Priority Data:
08/637,099 24.04.1996 US
Title (EN) TOUCH AND PRESSURE SENSING METHOD AND APPARATUS
(FR) PROCEDE ET DISPOSITIF POUR DETECTER LE CONTACT ET LA PRESSION
Abstract: front page image
(EN)The present invention provides a touch pad (10) which can detect a simple stylus using a change capacitance. The touch pad (10) is made flexible, so that the stylus pressure compresses an insulating layer between a conductive reference layer and matrix of conductive traces. The compression causes a change in capacitance due to either the two capacitive conductive surfaces being closer to each other, or a variation of the dielectric value of the insulating layer due to the explosion of air in air gaps.
(FR)L'invention concerne une tablette tactile (10) qui peut détecter un stylet simple par le biais d'un changement de capacité. La tablette tactile (10) est flexible, de façon que la pression du stylet comprime une couche isolante disposée entre une couche de référence conductrice et une matrice de traces conductrices. La compression provoque une modification de la capacité due soit au rapprochement des deux surfaces conductrices capacitives, soit à une variation de la valeur diélectrique de la couche isolante liée à l'expulsion de l'air contenu dans les couches d'air.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU.
African Regional Intellectual Property Organization (GH, KE, LS, MW, SD, SZ, UG)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)