Patent ID: 9144136
Filing Date: 2015-09-22
Classification: F21K,G09G,H05B

Abstract:
1. A method for controlling a lighting apparatus comprising a first light source unit, a second light source unit and a third light source unit, the method comprising: outputting an R component signal, a G component signal and a B component signal, each of which respectively corresponds to light quantities of an R component, a G component and a B component of lights outputted from the first light source unit, the second light source unit and the third light source unit; receiving the R component signal, the G component signal and the B component signal and generating a comparative color coordinate; and comparing the comparative color coordinate with a standard color coordinate located within an area formed by the respective color coordinates of the first, the second and the third light source units, and controlling light quantities of the first, the second and the third light source units to reduce an error value between the standard color coordinate and the comparative color coordinate, wherein the standard color coordinate or the comparative color coordinate is generated by measuring the R component, the G component and the B component of the light emitted from the first, second and third light source units, by calculating a tristimulus value in correspondence with the light quantities of the measured R component, G component and B component, and by calculating the standard color coordinate or the comparative color coordinate by using the tristimulus value.