×

Flexible fingerprint sensor

  • US 8,363,028 B2
  • Filed: 07/26/2012
  • Issued: 01/29/2013
  • Est. Priority Date: 10/23/2006
  • Status: Active Grant
First Claim
Patent Images

1. A flexible pressure sensor comprising:

  • a single elastomeric layer having a top, a bottom, a lower portion above the bottom, an upper portion below the top, and a middle portion between the lower portion and the upper portion, wherein the single elastomeric layer is capable of returning to substantially its original dimensions on release of pressure;

    a plurality of non-oriented conductive particles distributed homogeneously with no relative orientation between the top and bottom of the single elastomeric layer;

    a first set of the non-oriented conductive particles within the single elastomeric layer that have been combined together to form a first set of substantially parallel conductors disposed within the lower portion of the single elastomeric layer above the bottom of the single elastomeric layer in the x direction;

    a second set of the non-oriented conductive particles within the single elastomeric layer that have been combined together to form a second set of substantially parallel conductors disposed within the upper portion of the single elastomeric layer below the top of the single elastomeric layer in the y direction; and

    wherein the non-oriented conductive particles disposed within the single elastomeric layer electrically connect the first set and second set of conductors in the z direction under application of sufficient pressure that reduces an electrical resistance of the single elastomeric layer there between.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×