Patent ID: 8410727

Claim:
An LED lighting device comprising: a first light-emitting unit and a second light-emitting unit differing in a color temperature mutually; and a control circuit for generating a switching control signal based on a chromaticity control signal and a luminance control signal, and executing a cyclic light/quench control of the first light-emitting unit and the second light-emitting unit so as to have a lighting period for lighting/quenching the first light-emitting unit and the second light-emitting unit complementarily, and a quenching period for quenching both the first light-emitting unit and the second light-emitting unit, according to the generated switching control signal, and for generating a pulse number modulation output signal based on the chromaticity control signal and the luminance control signal, and executing a light control of the first light-emitting unit and the second light-emitting unit by a pulse number modulation control in a fixed cycle according to the switching control signal on which the generated pulse number modulation output signal is superimposed.