Membrane assembly and touch keyboard using the same

Abstract

This invention provides a touch keyboard, comprising keycaps and a membrane assembly. The membrane assembly is disposed below the keycaps, and the keycaps form a keycap projection area on the membrane assembly. The membrane assembly includes a first capacitor electrode layer, a second capacitor electrode layer, and a spacer layer. A capacitor is formed between the first capacitor electrode layer and the second capacitor electrode layer. The first capacitor electrode layer has a first switching area located within the keycap projection area. The second capacitor electrode layer has a second switching area located within the keycap projection area and at least partially overlaps with the first switching area in the vertical direction. The spacer layer has a spacing hole corresponding to the overlap of the first and second switching areas and separating them by a first distance.

Claims

1. A touch keyboard, comprising: a plurality of keycaps; A membrane assembly is disposed below the plurality of keycaps, the plurality of keycaps forming a plurality of keycap projection areas on the membrane assembly, the membrane assembly comprising: A first capacitor electrode layer has a plurality of first switching regions, which are respectively located in the plurality of keycap projection regions; A second capacitor electrode layer, wherein a capacitor is formed between the second capacitor electrode layer and the first capacitor electrode layer, the second capacitor electrode layer having a plurality of second switching regions, the plurality of second switching regions being located in the orthographic projection regions of the plurality of keycaps, the plurality of second switching regions overlapping at least partially with the plurality of first switching regions in the vertical direction; and a spacer layer having a plurality of spacer holes, the plurality of spacer holes being respectively disposed at the vertical overlap of the first switching regions and the second switching regions, the first switching regions and the second switching regions being separated by a first gap through the spacer holes.

2. The touch keyboard as described in claim 1, wherein, The thin film assembly further includes a first thin film and a second thin film, with the spacer layer sandwiched between the first thin film and the second thin film.

3. The touch keyboard as described in claim 2, wherein, The first film has a first inner surface and a first outer surface, and the second film has a second inner surface and a second outer surface. The first inner surface and the first outer surface are disposed opposite to each other, and the second inner surface and the second outer surface are disposed opposite to each other. The first inner surface faces the second inner surface.

4. The touch keyboard as described in claim 3, wherein, The first capacitor electrode layer is disposed on the first inner surface, and the second capacitor electrode layer is disposed on the second inner surface.

5. The touch keyboard as described in claim 1, wherein, The first capacitor electrode layer includes a plurality of first electrode arrays extending along a first direction and spaced apart along a second direction; the second capacitor electrode layer includes a plurality of second electrode arrays extending along the second direction and spaced apart along the first direction, the first direction being perpendicular to the second direction.

6. The touch keyboard as described in claim 1, wherein, The thin-film assembly is further connected to a control module. The thin-film assembly is pressed against the overlapping area of ​​the first switch area and the second switch area, causing the first switch area and the second switch area to move closer to each other through the gap hole to a second gap. The capacitance value of the capacitors in the first switch area and the second switch area changes, and the control module outputs a button signal. The second gap is greater than zero.

7. A touch keyboard as described in claim 6, wherein, The first spacing is 0.1 mm, and the second spacing is 0.01 mm.

8. The touch keyboard as described in claim 1, wherein, The first switching region and the second switching region have one or any combination of an extension, a recess, a notch, and a switching portion.

9. A touch keyboard as described in claim 4, wherein, The thin-film assembly further includes a first insulating layer and a second insulating layer, the first insulating layer being disposed on the surface of the first capacitor electrode layer and the second insulating layer being disposed on the surface of the second capacitor electrode layer.

10. A touch keyboard as described in claim 9, wherein, The first insulating layer extends further to cover the first inner surface, and the second insulating layer extends further to cover the second inner surface.

11. The touch keyboard as described in any one of claims 1 to 10, the touch keyboard further comprising: Multiple connection components; One base plate; and a plurality of elastic elements; wherein the plurality of connecting components are pivotally connected to the plurality of keycaps and the base plate respectively, and are used to move the plurality of keycaps up and down relative to the base plate, the base plate is disposed below the membrane assembly, the plurality of elastic elements are respectively located between the plurality of keycaps and the membrane assembly, and the plurality of elastic elements are used to elastically reset the plurality of keycaps.

12. A thin-film assembly, comprising: A first capacitor electrode layer having a plurality of first switching regions; A second capacitor electrode layer, wherein a capacitor is formed between the second capacitor electrode layer and the first capacitor electrode layer, the second capacitor electrode layer having a plurality of second switching regions, the plurality of second switching regions overlapping at least partially with the plurality of first switching regions in the vertical direction; and a spacer layer having a plurality of spacer holes, the plurality of spacer holes being respectively disposed at the vertical overlap of the first switching regions and the second switching regions, the first switching regions and the second switching regions being separated by a first gap through the spacer holes.

13. The thin-film assembly as described in claim 12, wherein, The thin film assembly further includes a first thin film and a second thin film, with the spacer layer sandwiched between the first thin film and the second thin film.

14. The thin-film assembly as described in claim 13, wherein, The first film has a first inner surface and a first outer surface, and the second film has a second inner surface and a second outer surface. The first inner surface and the first outer surface are disposed opposite to each other, and the second inner surface and the second outer surface are disposed opposite to each other. The first inner surface faces the second inner surface.

15. The thin-film assembly as described in claim 14, wherein, The first capacitor electrode layer is disposed on the first inner surface, and the second capacitor electrode layer is disposed on the second inner surface.

16. The thin-film assembly as described in claim 12, wherein, The first capacitor electrode layer includes a plurality of first electrode arrays extending along a first direction and spaced apart along a second direction; the second capacitor electrode layer includes a plurality of second electrode arrays extending along the second direction and spaced apart along the first direction, the first direction being perpendicular to the second direction.

17. The thin-film assembly as described in claim 12, wherein, in, The thin-film assembly is further connected to a control module. The thin-film assembly is pressed against the overlapping area of ​​the first switch area and the second switch area, causing the first switch area and the second switch area to move closer to each other through the gap hole to a second gap. The capacitance value of the capacitors in the first switch area and the second switch area changes, and the control module outputs a button signal. The second gap is greater than zero.

18. The thin-film assembly as described in claim 17, wherein, The first spacing is 0.1 mm, and the second spacing is 0.01 mm.

19. The thin-film assembly as described in claim 12, wherein, The first switching region and the second switching region have one or any combination of an extension, a recess, a notch, and a switching portion.

20. The thin-film assembly as claimed in claim 15, wherein, The thin-film assembly further includes a first insulating layer and a second insulating layer, the first insulating layer being disposed on the surface of the first capacitor electrode layer and the second insulating layer being disposed on the surface of the second capacitor electrode layer.

21. The thin-film assembly as described in claim 20, wherein, The first insulating layer extends further to cover the first inner surface, and the second insulating layer extends further to cover the second inner surface.

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