Patent ID: 8016440
Filing Date: 2011-09-13
Classification: F21K,F21S,F21Y,H01L,H05B,Y10S,Y10T

Abstract:
1. A method of making an interchangeable LED bulb that can be interchangeably used with other LED bulbs in an LED light string without affecting performance and luminosity of said light string, said LED bulb having a first resistor, a second resistor, and an LED element, comprising: selecting an operating current (I selecting a standardized input impedance for said interchangeable LED bulb that is substantially equal to input impedances of said other LED bulbs in said LED light string, by determining an input voltage and an input current to be applied to said interchangeable LED bulb when said interchangeable LED bulb is inserted in said light string; selecting resistive values for said first resistor and said second resistor so that said operating current (I connecting a first resistor in series with said LED element; connecting a second resistor in series with said first resistor and in parallel with said LED element.