Systems and methods for current matching of LED channels

A system for generating a plurality of channel currents, the system comprising:

• a first channel current divider configured to generate a first input current, a second input current, and a third input current;
• a second channel current divider configured to generate a fourth input current, a fifth input current, and a sixth input current;
• a first channel driver configured to generate a first channel current based at least in part on the first input current, the second input current, and the third input current;
• and
• a second channel driver configured to generate a second channel current based at least in part on the fourth input current, the fifth input current, and the sixth input current;
• wherein the first channel driver includes:
• a first transistor including a first transistor terminal, a second transistor terminal, and a third transistor terminal;
• a second transistor including a fourth transistor terminal, a fifth transistor terminal, and a sixth transistor terminal;
• a first resistor associated with a first resistance and coupled to the third transistor terminal at a first voltage;
• and
• a second resistor associated with a second resistance and coupled to the sixth transistor terminal at a second voltage;
• wherein:
• the first transistor terminal and the fourth transistor terminal are coupled;
• the second transistor terminal is configured to receive the second input current;
• and
• the fifth transistor terminal is configured to receive the third input current;
• wherein:
• a multiplication of the first resistance and a sum of the second input current and the first channel current is equal to a first magnitude;
• a multiplication of the second resistance and a sum of the first input current and the third input current is equal to a second magnitude;
• the first magnitude is equal to the second magnitude minus an offset voltage;
• and
• the offset voltage is equal to a difference between the second voltage and the first voltage in magnitude.

A method for generating a plurality of channel currents, the method comprising:

• generating a first input current, a second input current, and a third input current based on at least a first channel driving current;
• processing the first input current, the second input current, and the third input current;
• generating a fourth input current, a fifth input current, and a sixth input current based on at least a second channel driving current;
• processing the fourth input current, the fifth input current, and the sixth input current;
• generating a first channel current based on at least the first input current, the second input current, and the third input current;
• and
• generating a second channel current based on at least the fourth input current, the fifth input current, and the sixth input current;
• wherein:
• a sum of the first input current and the second input current is equal to the first channel driving current;
• the second input current is equal to the third input current;
• a sum of the fourth input current and the fifth input current is equal to the second channel driving current;
• and
• the fifth input current is equal to the sixth input current.

A method for generating a plurality of channel currents, the method comprising:

• generating a first input current, a second input current, and a third input current;
• processing the first input current, the second input current, and the third input current;
• generating a fourth input current, a fifth input current, and a sixth input current;
• processing the fourth input current, the fifth input current, and the sixth input current;
• generating a first channel current based on at least the first input current, the second input current, and the third input current;
• and
• generating a second channel current based on at least the fourth input current, the fifth input current, and the sixth input current;
• wherein:
• a multiplication of a first resistance and a sum of the second input current and the first channel current is equal to a first magnitude;
• a multiplication of a second resistance and a sum of the first input current and the third input current is equal to a second magnitude;
• and
• the first magnitude is equal to the second magnitude minus an offset voltage.