Patent ID: 9357619
Filing Date: 2016-05-31
CPC Classification: G01J,G08B,H05B,Y02B

Claim Text:
1. A lighting device having a passive infrared sensor, comprising: a light-emitting module; a passive infrared sensor generating a series of voltage sensing signals within a specified time period in response to motions of a human body at an environmental temperature; and a control circuit module electrically connected to the light-emitting module and the passive infrared sensor, and presetting therein with an adaptive base voltage threshold value, wherein the control circuit module receives the voltage sensing signals from the passive infrared sensor for controlling light emission of the light-emitting module; wherein the control circuit module raises the adaptive base voltage threshold value when a count of the occurrences that the voltage sensing signals from the passive infrared sensor are higher than the adaptive base voltage threshold value has reached a first preset count, or the control circuit module lowers the adaptive base voltage threshold value when a count of the occurrences that the voltage sensing signals from the passive infrared sensor are lower than the adaptive base voltage threshold value has reached a second preset count.