Patent ID: 9035558
Filing Date: 2015-05-19
Classification: A63J,G01J,H05B

Abstract:
1. A method for evaluating an energy intensity of ambient light comprising: a. providing a controller coupled with a memory, an electrical power supply and a light emitting diode (“diode”), the memory storing a stored voltage value (VR2), and the controller is adapted to receive a detection of ambient light intensity from the diode, wherein the controller is programmed to couple the electrical power supply to the diode when the derived intensity of ambient light is less than a reselected ambient light intensity level; b. exposing the diode to an ambient light environment, the diode having a cathode and an anode; c. imposing a test voltage (Vt) at a time zero T0 between the cathode and the anode of the diode, wherein the test voltage (Vt) is less than a peak inverse voltage of the diode; d. the controller measuring a dynamic voltage (Vt) instantiated between the cathode and an anode over time and after the time zero T0; e. the controller determining a delay time (Td) extending between the time zero (T0) and a time mark (Tm), the time mark (Tm) determined when the dynamic voltage (Vd) is detected to be less than the stored voltage value (VR2); and f. the controller deriving the intensity of the ambient light from decay time (Td).