A light emitting diode package, a light source module and a backlight unit including the same are provided. Thereafter, at least one line of the bar code is selected, a displacement of the position of the at least one selected line in the region of the sensor array is registered and the actual position is calculated therefrom by means of a previously determined position. The hair styling tool having the movable member which engages and disengages the hair with the bristles minimizes tangling of the hair while brushing. Flywheels maintain steady rotation of alternator shaft.