Chip-on-board illuminating device

A chip-on-board (COB) illuminating device, comprising:

• a light source component, comprising:
• a plurality of illuminating sets, which are electrically coupled in series;
• a control module, comprising:
• a plurality of control terminals formed in pairs, wherein each pair of control terminals comprises a preceding control terminal and a succeeding control terminal and corresponds to an intersection between a preceding illuminating set and a succeeding illuminating set out of the plurality of illuminating sets, the preceding control terminal is electrically coupled to the preceding illuminating set, and the succeeding control terminal is electrically coupled to the succeeding illuminating set;
• an input control terminal, electrically coupled to a head illuminating set of the plurality of illuminating sets;
• an output control terminal, electrically coupled to a tail illuminating set of the plurality of illuminating sets;
• and
• a constant current control unit, electrically coupled to the plurality of control terminals, the input control terminal and the output control terminal, and configured to activate a dynamic number of illuminating sets out of the plurality of illuminating sets starting from the head illuminating set, and the dynamic number is directly proportional to a voltage level of an input voltage received by the constant current control unit;
• and
• a base plate component, comprising:
• a base plate, configured to load both the light source component and the constant current control unit;
• and
• an insulating package, loaded on the base plate and configured to cover the light source component, wherein each of the plurality of illuminating set comprises a plurality of illuminating units that are electrically coupled in series, wherein each of the plurality of illuminating set further comprises a diode that is electrically coupled to a head of the plurality of illuminating units in series.