×

SLEEP EVALUATION DEVICE

  • US 20080306351A1
  • Filed: 06/06/2008
  • Published: 12/11/2008
  • Est. Priority Date: 06/06/2007
  • Status: Active Grant
First Claim
Patent Images

1. A sleep evaluation device comprising:

  • a biometric signal measurer that measures a state of a human subject, for output as a biometric signal;

    a primary parameter generator that generates, based on the biometric signal, n number of primary parameters indicating a state of sleep, the n being a natural number that is at least 2;

    a secondary parameter generator that generates m number of secondary parameters by multiplying each of the n number of primary parameters by an eigenvector, with the eigenvector being a first coefficient, and totalizing results of the multiplications, the m being a natural number satisfying n≧

    m and a correlation coefficient of any two of the secondary parameters being smaller than a correlation coefficient of any two of the primary parameters; and

    a sleep index generator that computes a sleep index indicating a quality of sleep based on a result of computation obtained by multiplying each of the secondary parameters by a second coefficient and totalizing results of the multiplications.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×