SYSTEM AND METHOD OF DETERMINING LIGHT SOURCE AGING
First Claim
1. A monitoring system comprising:
- a sensor having a light source; and
an age detector circuit in communication with said light source and configured to determine an age of said light source based on a current-voltage characteristic of said light source.
4 Assignments
0 Petitions
Accused Products
Abstract
A physiological sensor includes a light source and an age detector circuit in communication with the light source. The age detector circuit is configured to determine an age of the light source based on current-voltage characteristics of said light source. In addition, a method includes measuring an initial I-V characteristic and an actual I-V characteristic of the light source, and comparing the initial I-V characteristic to the actual I-V characteristic since changes in the I-V characteristics indicate aging. Actual I-V characteristics can be compared between light sources when they age at different rates to determine light source aging. Moreover, the method may include updating the memory device with the actual I-V characteristic at predetermined times.
-
Citations
23 Claims
-
1. A monitoring system comprising:
-
a sensor having a light source; and an age detector circuit in communication with said light source and configured to determine an age of said light source based on a current-voltage characteristic of said light source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method of determining an age of a light source, said method comprising:
-
measuring an initial current-voltage characteristic of the light source; measuring an actual current-voltage characteristic of the light source; and comparing the initial current-voltage characteristic of the light source to the actual current-voltage characteristic of the light source to determine the age of the light source. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
Specification