Power supply circuit, display driver, electro-optical device, and electronic instrument

A power supply circuit that outputs a boosted voltage, the power supply circuit comprising:

• a voltage booster circuit that generates a boosted voltage by boosting a second voltage with respect to a first voltage;
• and
• a limiter circuit that limits a potential of the boosted voltage,
• the limiter circuit discharging a charge to or charging a charge from a power supply line so that the boosted voltage becomes a given target voltage, the second voltage being supplied to the power supply line,
• the voltage booster circuit changing a boost capability corresponding to an output load of the power supply circuit,
• the power supply circuit decreasing the boost capability when the power supply circuit has determined that the boost capability is high with respect to the output load of the power supply circuit, and
• the power supply circuit increasing the boost capability when the power supply circuit has determined that the boost capability is low with respect to the output load of the power supply circuit.

A power supply circuit that outputs a boosted voltage, the power supply circuit comprising:

• a voltage booster circuit that generates a boosted voltage by boosting a second voltage with respect to a first voltage;
• and
• a limiter circuit that limits a potential of the boosted voltage,
• the limiter circuit discharging a charge to or charging a charge from a power supply line so that the boosted voltage becomes a given target voltage, the second voltage being supplied to the power supply line,
• the voltage booster circuit changing a boost capability corresponding to an output load of the power supply circuit, and
• the voltage booster circuit changing the boost capability based on the output load and limiter operation information, the limiter operation information indicating whether or not the limiter circuit has limited the potential of the boosted voltage.

A power supply circuit that outputs a boosted voltage, the power supply circuit comprising:

• a voltage booster circuit that generates a boosted voltage by boosting a second voltage with respect to a first voltage;
• and
• a limiter circuit that limits a potential of the boosted voltage,
• the limiter circuit discharging a charge to or charging a charge from a power supply line so that the boosted voltage becomes a given target voltage, the second voltage being supplied to the power supply line,
• the voltage booster circuit changing a boost capability corresponding to an output load of the power supply circuit,
• a drive voltage corresponding to grayscale data supplied to a source line among a plurality of source lines of the electro-optical device being generated based on the boosted voltage,
• the output load being evaluated based on a sum total of grayscale data of the plurality of source lines corresponding to one scan line.

A power supply circuit that outputs a boosted voltage, the power supply circuit comprising:

• a voltage booster circuit that generates a boosted voltage by boosting a second voltage with respect to a first voltage;
• and
• a limiter circuit that limits a potential of the boosted voltage,
• the limiter circuit discharging a charge to or charging a charge from a power supply line so that the boosted voltage becomes a given target voltage, the second voltage being supplied to the power supply line,
• the voltage booster circuit changing a boost capability corresponding to an output load of the power supply circuit,
• the voltage booster circuit including:
• a first charge-pump circuit that generates the boosted voltage by boosting the output voltage from the regulator with respect to the first voltage by a charge-pump operation using a first flying capacitor;
• and
• a second charge-pump circuit that generates the boosted voltage by boosting the second voltage with respect to the first voltage by a charge-pump operation using a second flying capacitor, the second flying capacitor having a capacitance larger than a capacitance of the first flying capacitors,
• the power supply circuit outputting the boosted voltage generated by the first charge-pump circuit, the boosted voltage generated by the second charge-pump circuit, or the boosted voltage generated by the first charge-pump circuit and the second charge-pump circuit after the boost capability of the voltage booster circuit has been changed.

A display driver that drives an electro-optical device, the display driver comprising:

• a power supply circuit that outputs a boosted voltage, the power supply circuit including:
• a voltage booster circuit that generates a boosted voltage by boosting a second voltage with respect to a first voltage;
• and
• a limiter circuit that limits a potential of the boosted voltage, the limiter circuit discharging a charge to or charging a charge from a power supply line so that the boosted voltage becomes a given target voltage, the second voltage being supplied to the power supply line,
• a driver section that drives the electro-optical device, and
• a drive voltage of the driver section being generated based on the boosted voltage.

An electro-optical device comprising:

• a plurality of gate lines;
• a plurality of source lines;
• a gate driver that scans the plurality of gate lines;
• a source driver that drives the plurality of source lines;
• a power supply circuit, the power supply circuit including:
• a voltage booster circuit that generates a boosted voltage by boosting a second voltage with respect to a first voltage;
• and
• a limiter circuit that limits a potential of the boosted voltage, the limiter circuit discharging a charge to or charging a charge from a power supply line so that the boosted voltage becomes a given target voltage, the second voltage being supplied to the power supply line;
• and
• at least one of a scan voltage of the gate driver and a drive voltage of the source driver being generated based on the boosted voltage.