Color temperature variable light emitting diode module, lighting device using the light emitting diode module and method for fabricating the light emitting diode module

A color temperature variable light emitting diode module that is driven when alternating current power is applied thereto, comprising:

• a substrate;
• a plurality of light emitting diode groups arranged on the substrate and comprising a first light emitting diode group emitting light at an input voltage level equal to or above a first reference voltage and a second light emitting diode group emitting light at an input voltage level equal to or above a second reference voltage higher than the first reference voltage;
• first wavelength converting elements disposed on corresponding light emitting diodes of the first light emitting diode group and converting primary light emitted from the light emitting diodes of the first light emitting diode group into secondary light having a first color temperature;
• an encapsulant comprising second wavelength converting elements and a resin, the second wavelength converting elements being disposed on the first light emitting diode group, the first wavelength converting elements, and the second light emitting diode group and converting some or all of primary light emitted from the first light emitting diode group, primary light emitted from the second light emitting diode group, and the secondary light emitted through the first wavelength converting elements into tertiary light having a second color temperature;
• and
• a control unit connected between the alternating current power and the plurality of light emitting diode groups to detect the input voltage level inputted by the alternating current power,
• wherein mixed light of the secondary light and the tertiary light is emitted or either the secondary light or the tertiary light is emitted in response to the input voltage level detected by the control unit.

A color temperature variable light emitting diode module that is driven when alternating current power is applied thereto, comprising:

• a substrate;
• a first light emitting diode group arranged on the substrate and comprising a plurality of light emitting diodes and first wavelength converting elements disposed on the corresponding light emitting diodes, the first light emitting diode group being configured to emit light at an input voltage level equal to or above a first reference voltage;
• a second light emitting diode group arranged on the substrate and connected in series with the first light emitting diode group, the second light emitting diode group comprising a plurality of light emitting diodes, the second light emitting diode group being configured to emit light at an input voltage level equal to or above a second reference voltage higher than the first reference voltage;
• an encapsulation layer encapsulating the first light emitting diode group and the second light emitting diode group and comprising second wavelength converting elements;
• and
• a control unit connected between the alternating current power and the plurality of light emitting diode groups to detect an input voltage level inputted by the alternating current power,
• wherein the first light emitting diode group is driven to emit light having a first color temperature when the detected input voltage level is equal to or above the first reference voltage, and the first light emitting diode group and the second light emitting diode group are driven to emit light having a second color temperature when the detected input voltage level is equal to or above the second reference voltage level higher than the first reference voltage.