Display driver, circuit device, electro-optical device, and electronic apparatus

A circuit device, comprising:

• a driving circuit including an amplifier circuit and configured to:
• cause the amplifier circuit to output a data voltage corresponding to display data;
• drive a data line with a higher driving capability than a driving capability of the amplifier circuit, in a first driving duration;
• and
• cause the amplifier circuit to output the data voltage to the data line in a second driving duration following the first driving duration;
• a reference voltage generation circuit configured to generate a reference voltage supplied to a reference current source of the amplifier circuit and output the reference voltage to an output node, the reference voltage generation circuit including:
• a current source circuit, having one end connected with the output node, and another end connected with a node of a second power source, configured to make a current set based on a current setting signal flow between the output node and a node of the second power source;
• and
• a current voltage conversion circuit, having one end connected with the output node, and another end connected with a node of a first power source, configured to convert the current made to flow by the current source circuit to the reference voltage;
• and
• a setting circuit configured to set a voltage of the output node to the first voltage in the first driving duration, and set the voltage of the output node to the reference voltage in the second driving duration, the setting circuit including:
• first to m-th capacitors, each having one end that is connected with the output node;
• a control circuit configured to control a voltage of another end of each of the first to the m-th capacitors based on an enable signal to change a voltage of the output node from a first voltage at which a reference current flowing in the reference current source is off, toward the reference voltage;
• and
• control a voltage of the other end of each of one or more capacitors selected based on the current setting signal among the first to the m-th capacitors.

A display driver, comprising:

• a setting circuit including a capacitor having one end connected with an output node, the setting circuit being configured to:
• output a first voltage to the output node and set the one end and another end of the capacitor to the first voltage, when an enable signal is inactive;
• change a voltage of the output node from the first voltage toward a reference voltage when the enable signal changes from inactive to active;
• and
• set the voltage of the output node to the reference voltage and set the other end of the capacitor to a second voltage different from the first voltage, when the enable signal is active;
• and
• an amplifier circuit including a reference current source, wherein
• in the amplifier circuit, when a voltage of the output node is the first voltage, a reference current flowing in the reference current source is turned off, and the amplifier circuit is configured to output a data voltage corresponding to display data when the voltage of the output node is the reference voltage.

A circuit device, comprising:

• a reference voltage generation circuit configured to generate a reference voltage and output the reference voltage to an output node;
• and
• a setting circuit configured to set a voltage of the output node of the reference voltage generation circuit, the setting circuit including:
• a capacitor having one end connected with the output node;
• and
• a control circuit configured to:
• control a voltage of another end of the capacitor based on an enable signal to change a voltage of the output node from a first voltage toward the reference voltage;
• set the one end and the other end of the capacitor to the first voltage when the enable signal is inactive;
• and
• set the other end of the capacitor to a second voltage different from the first voltage when the enable signal is active.