Display device with improved flexibility
First Claim
1. A support for an electrically modulated imaging element comprising a flexible substrate of nonhomogeneous material and of uniform thickness, said flexible substrate having a more flexible area and a less flexible area, wherein said less flexible area underlies an electrically modulated imaging area of said electrically modulated imaging element.
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Abstract
The present invention relates to a support for an electrically modulated imaging element and a display made with the support comprising a flexible substrate of nonhomogeneous material and of uniform thickness, which has a less flexible area underlying and more flexible area. The present invention also relates to a support for an electrically modulated imaging element and a display made with the support comprising a continuous flexible layer having attached thereto at least one reinforcing area, wherein the reinforcing area underlies an electrically modulated imaging area. The present invention also includes a method and a coextrusion die apparatus for making the support.
168 Citations
50 Claims
- 1. A support for an electrically modulated imaging element comprising a flexible substrate of nonhomogeneous material and of uniform thickness, said flexible substrate having a more flexible area and a less flexible area, wherein said less flexible area underlies an electrically modulated imaging area of said electrically modulated imaging element.
- 16. A support comprising a continuous flexible layer having attached thereto at least one reinforcing area, wherein said reinforcing area underlies an electrically modulated imaging area.
- 29. A display comprising an array of cell enclosures, wherein said cell enclosures comprise an electrically modulated imaging layer, and a first transparent conductive layer applied to a support, wherein said support comprises a flexible substrate of nonhomogeneous material and of uniform thickness having a more flexible area and a less flexible area, wherein said less flexible area underlies said cell enclosure.
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41. A display comprising an array of cell enclosures, wherein said cell enclosures comprise an electrically modulated imaging layer, and a first transparent conductive layer applied to a support, wherein said support comprises a continuous flexible layer having attached thereto at least one reinforcing area, wherein said reinforcing area underlies said cell enclosure.
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42. A method for making a flexible substrate of nonhomogeneous material and of uniform thickness comprising:
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providing at least a first molten polymer stream and at least a second molten polymer stream;
combining said first molten polymer stream and said second molten polymer stream into a melt curtain, wherein said first molten polymer stream and said second molten polymer stream are adjacent to each other and oriented vertically;
contacting said melt curtain to a cooling roller;
elongating said melt curtain;
cooling said melt curtain on a chill roller; and
stripping said cooled melt curtain off said chill roller. - View Dependent Claims (43, 44)
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- 45. A coextrusion die apparatus for forming a multi-segment sheet comprising extrusion equipment for supplying at least two molten polymers of differing viscosities connected to a die manifold, wherein said die manifold comprises at least two die blocks, one die block for each of said at least two molten polymers, wherein said die block comprises a polymer inlet port for receiving molten polymer, a polymer distribution cavity connecting said polymer inlet port to a pixel slot flow channel, wherein said pixel slot flow channel is connected to an exit slot, and a substrate for receiving said at least two molten polymers from said exit slot.
Specification