Fabric-based items with electrical component arrays
A fabric-based item may include fabric layers and other layers of material. An array of electrical components may be mounted in the fabric-based item. The electrical components may be mounted to a support structure such as a flexible printed circuit. The flexible printed circuit may have a mesh shape formed from an array of openings. Serpentine flexible printed circuit segments may extend between the openings. The electrical components may be light-emitting diodes or other electrical devices. Polymer with light-scattering particles or other materials may cover the electrical components. The flexible printed circuit may be laminated between fabric layers or other layers of material in the fabric-based item.
1. A fabric-based item comprising:
an array of electrical components mounted on a flexible substrate;
a polymer layer that covers the array of electrical components; and
a fabric layer to which the polymer layer is attached, wherein the fabric layer has a plurality of windows, wherein each window is aligned with a respective electrical component of the array of electrical components, and wherein each window has a lower yarn density than remaining portions of the fabric layer.
2. The fabric-based item defined in claim 1 , further comprising:
a first adhesive layer that attaches the polymer layer to the fabric layer;
an additional polymer layer, wherein the flexible substrate is interposed between the polymer layer and the additional polymer layer;
an additional fabric layer to which the additional polymer layer is attached; and
a second adhesive layer that attaches the additional polymer layer to the additional fabric layer.
3. The fabric-based item defined in claim 1 , wherein each window is more transparent than remaining portions of the fabric layer.
4. The fabric-based item defined in claim 1 , wherein the flexible substrate comprises a flexible printed circuit having an array of openings.
5. The fabric-based item defined in claim 1 , wherein the array of electrical components comprises light-emitting diodes.
6. The fabric-based item defined in claim 1 , further comprising a bead of translucent polymer covering each of the electrical components of the array of electrical components.
7. The fabric-based item defined in claim 6 , wherein the polymer layer is a clear polymer layer and the beads of translucent polymer are embedded within the clear polymer layer.
8. The fabric-based item defined in claim 1 , wherein each of the electrical components of the array of electrical components comprises an interposer to which multiple semiconductor dies are mounted.
9. The fabric-based item defined in claim 1 , wherein the array of electrical components comprises actuators.
10. The fabric-based item defined in claim 1 , wherein the array of electrical components comprises sensors.
11. A fabric-based item comprising:
an array of light-emitting diodes mounted on a flexible substrate;
a clear polymer layer that covers the array of light-emitting diodes; and
a fabric layer that overlaps the clear polymer layer and the array of light-emitting diodes, wherein the fabric layer has a plurality of windows, wherein each light-emitting diode emits light through one of the plurality of windows, and wherein each window includes perforations.
12. The fabric-based item defined in claim 11 , wherein each window is more transparent than remaining portions of the fabric layer.
13. A fabric-based item comprising:
an array of electrical components mounted on a flexible substrate;
a polymer layer that covers the array of electrical components; and
a fabric layer to which the polymer layer is attached, wherein the fabric layer has first portion having a first transparency and a second portion having a second transparency that is greater than the first transparency and wherein the second portion of the fabric layer overlaps one of the electrical components.
14. The fabric-based item defined in claim 13 , further comprising:
a first adhesive layer that attaches the polymer layer to the fabric layer;
an additional polymer layer, wherein the flexible substrate is interposed between the polymer layer and the additional polymer layer;
an additional fabric layer to which the additional polymer layer is attached; and
a second adhesive layer that attaches the additional polymer layer to the additional fabric layer.
15. The fabric-based item defined in claim 13 , wherein the array of electrical components comprises electrical components selected from a group consisting of: light-emitting diodes, actuators, and sensors.