Patent ID: 8681091

Claim:
A bistable display device comprising: a substrate having an upper surface and a lower surface; a display film disposed on the upper surface of the substrate; a display circuit formed between the upper surface of the substrate and the display film; an electromagnetic sensing layer formed on the lower surface of the substrate, the electromagnetic sensing layer comprising: a first electromagnetic sensing layer, wherein the first electromagnetic sensing layer comprising a plurality of longitudinal sensing nets and a plurality of transversal sensing nets intersected with the plurality of longitudinal sensing nets without contact; and a second electromagnetic sensing layer disposed under the first electromagnetic sensing layer, wherein the second electromagnetic sensing layer comprising a plurality of longitudinal sensing nets and a plurality of transversal sensing nets intersected with the plurality of longitudinal sensing nets without contact; a shielding layer disposed under the second electromagnetic sensing layer and at a side of the second electromagnetic sensing layer facing away from the display film and the display circuit, wherein the shielding layer is made of metallic material and configured for shielding the first electromagnetic sensing layer and the second electromagnetic sensing layer from a circuit board with a control circuit or a system circuit board separated from the substrate; and a protection layer disposed under the shielding layer.