Capacitive touch keyboard
AssigneeTouchplus Information Corp.
InventorShih Hsien Hu
Life of this patent
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Abstract
A capacitive touch keyboard includes a sensor layer, ground plane, a flexible sensed body, and a sensing circuit. The sensor layer includes a substrate and a key sensing cell which disposed on the substrate spaced apart from the ground plane. The flexible sensed body includes a sensed portion and a connected portion connected with the ground plane where the sensed portion obliquely extends to above the key sensing cell such that the flexible sensed body and the key sensing cell jointly form a capacitor structure. The sensing circuit is electrically connected to the sensing cell for probing a capacitance change. Therefore, features of more simplified structure design, tactile feel, and improved durability are provided in a capacitive keyboard.
Claims20
A capacitive touch keyboard, comprising:
- a sensor layer comprising a substrate and a key sensing cell;
- a ground plane disposed along with the key sensing cell on the substrate and spaced apart from the key sensing cell;
- a flexible sensed body comprising a sensed portion and a connected portion, wherein the connected portion is connected with the ground plane and the sensed portion extends from the connected portion to above the key sensing cell such that the flexible sensed body and the key sensing cell jointly form a capacitor structure;
- and
- a sensing circuit electrically connected to the key sensing cell to probe a capacitance change.
A capacitive touch keyboard, comprising:
- a sensor layer comprising a substrate and plural key sensing cells, wherein each key sensing cell comprises six sides and an inner protrusion, the six sides being looped to define an inner space and the inner protrusion extending from one of the sides into the inner space;
- plural ground planes corresponding to the plural key sensing cells and being disposed along with the key sensing cells on the substrate and spaced apart from the key sensing cells, wherein each of the ground planes surrounds the inner protrusion without contact within the corresponding inner space;
- plural flexible sensed bodies corresponding to the plural key sensing cells, wherein each of the sensed bodies comprises a sensed portion and a connected portion, the connected portion being connected with the corresponding ground plane and the sensed portion extending from the connected portion to above the inner protrusion of the corresponding key sensing cell such that the corresponding flexible sensed body and the key sensing cell jointly form a capacitor structure;
- and
- a sensing circuit electrically connected to each of the key sensing cells to probe a capacitance change.
Dependencies are inferred from the claim text.