US 7,339,578 B2
Multi-layer touch display device comprising electromagnetic actuators
Moustapha Hafez, Paris (France); Jean-Marc Alexandre, Antony (France); and Mohamed Benali Khoudja, Antony (France)
Assigned to Commissariat A l'Energie Atomique, Paris (France)
Appl. No. 10/538,421
PCT Filed Dec. 04, 2003, PCT No. PCT/FR03/50152
§ 371(c)(1), (2), (4) Date Jun. 09, 2005,
PCT Pub. No. WO2004/055754, PCT Pub. Date Jul. 01, 2004.
Claims priority of application No. 02 15527 (FR), filed on Dec. 09, 2002.
Prior Publication US 2006/0012576 A1, Jan. 19, 2006
Int. Cl. G09G 5/00 (2006.01)
U.S. Cl. 345—173  [715/701] 14 Claims
OG exemplary drawing
 
1. Touch-sensitive display device (10) comprising:
a touch plate (1) with a touch-sensitive surface,
a network of magnetic coils (31) in the form of a monolithic layer actuating parts to modify the tactile sensation, as a function of currents flowing in said coils (31) so as to produce on the touch-sensitive surface (16) a tactile sensation which is a function of the different currents flowing in each of said coils (31),
an intermediate layer (2) placed between the monolithic layer (3) of coils (31) and the touch plate (1),
an addressing circuit to address currents selectively into the different coils (31),
characterised in that:
the touch plate (1) comprises a monolithic network of tactile sensation modification components (11), constituted by a set of one or more blades (12) integral with the touch plate via one or more arms (13), one or more blade release grooves (14) being present around part of perimeter of the blade (12), each mobile blade being able to be displaced under the action of a magnetic field, each set of mobile blades (12) of a network component (11) being subject to the field produced by one or more coils (31) of the network, the intermediate layer (2) is insulant and comprises opposite each of the tactile sensation modification components (11), a recess (21) procuring a deformation space for said set of mobile blades (12) of this component (11).