Patent ID: 9265100
Filing Date: 2016-02-16
CPC Classification: H05B

Claim Text:
1. A driving circuit of a semiconductor-type light source for a vehicle lighting device, the device using the semiconductor-type light source as a light source, the semiconductor-type light source comprising a plurality of light emitting chips which are mounted on a board, the plurality of light emitting chips having different forward voltage characteristics within a predetermined forward voltage characteristics range, wherein the plurality of light emitting chips are randomly mounted in a bare-chip state on the board without classifying their specific forward voltage characteristics in advance; an opening resistor and a trimming resistor are mounted on the board and are disposed in parallel; the resistors being configured to be opened or trimmed to provide a combined resistance value corresponding to a combined forward voltage characteristics range of the plurality of light emitting chips such that the resistors feed a current of a set predetermined value for the plurality of light emitting chips, the combined forward voltage characteristics range corresponding to a combination of the predetermined forward voltage characteristics range of the plurality of light emitting chips; and the trimming resistor is trimmed after the plurality of light emitting chips has mounted on the board.