CAPACITIVE TOUCH KEYBOARD
First Claim
1. A capacitive touch keyboard, comprising:
- a shielding layer comprising a ground plane, wherein the shielding layer further comprises plural first key areas at an outer surface of the shielding layer;
a one-dimensional sensor layer comprising plural sensing cells, wherein the one-dimensional sensor layer further comprises plural second key areas at an outer surface of the one-dimensional sensor layer, and the plural sensing cells correspond to the plural second key areas and the plural first key areas;
an intermediate layer interposed between the ground plane of the shielding layer and the one-dimensional sensor layer so as to form a capacitor structure, wherein the shielding layer, the intermediate layer and the one-dimensional sensor layer are configured to have a clearance between shielding layer and the one-dimensional sensor layer changeable in response to a pressing operation of a user on the plural first key areas or the plural second key areas; and
a sensing circuit electrically connected to the plural sensing cells to probe a capacitance change.
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Accused Products
Abstract
A capacitive touch keyboard includes a shielding layer, a intermediate layer, and a one-dimensional sensor layer where the soft intermediate layer is interposed between the other two to form a capacitor structure. The shielding layer includes a ground plane, and plural first key areas at its outer surface. The one-dimensional sensor layer includes plural sensing cells and plural second key areas where the first key areas correspond to the second key areas, and respective cells are electrically connected to a sensing circuit. Therefore, features of more compact size, simplified structure design, and tactile feel are provided in a capacitive keyboard.
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Citations
20 Claims
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1. A capacitive touch keyboard, comprising:
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a shielding layer comprising a ground plane, wherein the shielding layer further comprises plural first key areas at an outer surface of the shielding layer; a one-dimensional sensor layer comprising plural sensing cells, wherein the one-dimensional sensor layer further comprises plural second key areas at an outer surface of the one-dimensional sensor layer, and the plural sensing cells correspond to the plural second key areas and the plural first key areas; an intermediate layer interposed between the ground plane of the shielding layer and the one-dimensional sensor layer so as to form a capacitor structure, wherein the shielding layer, the intermediate layer and the one-dimensional sensor layer are configured to have a clearance between shielding layer and the one-dimensional sensor layer changeable in response to a pressing operation of a user on the plural first key areas or the plural second key areas; and a sensing circuit electrically connected to the plural sensing cells to probe a capacitance change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A capacitive touch keyboard, comprising:
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a shielding layer comprising a grounding conductive structure; a one-dimensional sensor layer comprising a plurality of sensing cells, and having at least one key area on an outer surface of the one-dimensional sensor layer; an intermediate layer interposed between the shielding layer and the one-dimensional sensor layer so as to form a plurality of capacitor members, and having a through hole thereon corresponding to the key area, wherein the one-dimensional sensor layer deforms by way of a space of the through hole in response to a pressing operation on the key area, thereby changing a clearance between one of the sensing cells and the grounding conductive structure; and a sensing circuit electrically connected to the plurality of sensing cells for sensing both an electronic parameter change correlating to the clearance between one of the sensing cells and the grounding conductive structure, and a capacitance change resulting from a finger touch on the one-dimensional sensor layer. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification