Control device and light source device

A light source device, comprising:

• a first logic operation unit, for receiving a first enable signal and a second enable signal to generate a first logic signal;
• a first adjustment unit, coupled with the first logic operation unit, for receiving the first logic signal, and generating a first adjustment signal according to the first logic signal;
• a first control unit, coupled with the first adjustment unit, for receiving the first enable signal and the first adjustment signal, and generating a first control signal according to the first enable signal and the first adjustment signal;
• a first light-emitting diode, having an anode terminal for receiving an operating voltage, and a cathode terminal for receiving a first control signal;
• a second logic operation unit, for receiving the first enable signal and the second enable signal to generate a second logic signal, wherein the first and second logic signals are complementary;
• a second adjustment unit, coupled with the second logic operation unit, for receiving the second logic signal, and generating a second adjustment signal according to the second logic signal;
• and
• a second control unit, coupled with the second adjustment unit, for receiving the second enable signal and the second adjustment signal, and generating a second control signal according to the second enable signal and the second adjustment signal;
• a second light-emitting diode, having an anode terminal for receiving an operating voltage, and a cathode terminal for receiving the second control signal.

Light brightness and mixing control logic for two light emitting diodes (LEDs), the control logic comprising:

• a pair of enable signal lines, each line carrying either a first logic value or a second logic value, wherein the first logic value is operative to enable a corresponding one of the two LEDs to emit light, and the second logic value is operative to disable the corresponding LED from emitting light;
• and
• resistor circuits coupled to the enable signal lines, the resistor circuits operative to provide selectable resistance values to control the brightness of the LEDs;
• wherein:
• when neither signal line carries the first logic value, neither LED is operative to emit light;
• when both signal lines carry the first logic value, both LEDs are operative to emit light, each in accordance with a corresponding first selected resistance value;
• and
• when only one of the signal lines carries the first logic value, only the corresponding LED is operative to emit light, and in accordance with a corresponding second selected resistance value.