Charge pump, voltage control method for charge pump, and display device

A charge pump, comprising a voltage output end and a first step-up circuitry, wherein

• the first step-up circuitry comprises a first energy storage circuit, a second energy storage circuit, a first input control circuit, a first voltage application control circuit, a first output control circuit and a first charging path control circuit;
• the first input control circuit is configured to enable a first input voltage end to be electrically connected to, or electrically disconnected from, a first end of the first energy storage circuit, enable the first input voltage end to be electrically connected to, or electrically disconnected from, a second end of the first energy storage circuit, enable the first input voltage end to be electrically connected to, or electrically disconnected from, a first end of the second energy storage circuit, and enable the first input voltage end to be electrically connected to, or electrically disconnected from, a second end of the second energy storage circuit;
• the first voltage application control circuit is configured to enable the first end of the first energy storage circuit to be electrically connected to, or electrically disconnected from, a first voltage end, and enable the first end of the second energy storage circuit to be electrically connected to, or electrically disconnected from, a second voltage end;
• the first charging path control circuit is configured to enable the second end of the first energy storage circuit to be electrically connected to, or electrically disconnected from, the first end of the second energy storage circuit, and enable the second end of the first energy storage circuit to be electrically connected to, or electrically disconnected from, the second end of the second energy storage circuit;
• and
• the first output control circuit is configured to enable the second end of the second energy storage circuit to be electrically connected to, or electrically disconnected from, the voltage output end,
• wherein the charge pump further comprises a second step-up circuitry, wherein
• the second step-up circuitry comprises a third energy storage circuit, a fourth energy storage circuit, a second input control circuit, a second voltage application control circuit, a second output control circuit and a second charging path control circuit;
• the second input control circuit is configured to enable a second input voltage end to be electrically connected to, or electrically disconnected from, a first end of the third energy storage circuit, enable the second input voltage end to be electrically connected to, or electrically disconnected from, a second end of the third energy storage circuit, enable the second input voltage end to be electrically connected to, or electrically disconnected from, a first end of the fourth energy storage circuit, and enable the second input voltage end to be electrically connected to, or electrically disconnected from, a second end of the fourth energy storage circuit;
• the second voltage application control circuit is configured to enable the first end of the third energy storage circuit to be electrically connected to, or electrically disconnected from, a third voltage end, and enable the first end of the fourth energy storage circuit to be electrically connected to, or electrically disconnected from, a fourth voltage end;
• the second charging path control circuit is configured to enable the second end of the third energy storage circuit to be electrically connected to, or electrically disconnected from, the first end of the fourth energy storage circuit, and enable the second end of the third energy storage circuit to be electrically connected to, or electrically disconnected from, the second end of the fourth energy storage circuit;
• and
• the second output control circuit is configured to enable the second end of the fourth energy storage circuit to be electrically connected to, or electrically disconnected from, the voltage output end,
• wherein
• the third energy storage circuit comprises a third storage capacitor, a negative plate of the third storage capacitor is the first end of the third energy storage circuit and a positive plate of the third storage capacitor is the second end of the third energy storage circuit,
• the fourth energy storage circuit comprises a fourth storage capacitor, a negative plate of the fourth storage capacitor is the first end of the fourth energy storage circuit, and a positive plate of the fourth storage capacitor is the second end of the fourth energy storage circuit, and
• the second input control circuit comprises:
• a fifth input control transistor, wherein a first electrode of the fifth input control transistor is electrically connected to the second input voltage end, and a second electrode of the fifth input control transistor is electrically connected to the positive plate of the fourth storage capacitor;
• a sixth input control transistor, wherein a first electrode of the sixth input control transistor is electrically connected to the second input voltage end, and a second electrode of the sixth input control transistor is electrically connected to the negative plate of the third storage capacitor;
• a seventh input control transistor, wherein a first electrode of the seventh input control transistor is electrically connected to the second input voltage end, and a second electrode of the seventh input control transistor is electrically connected to the positive plate of the third storage capacitor;
• an eighth input control transistor, wherein a first electrode of the eighth input control transistor is electrically connected to the second input voltage end, and a second electrode of the eighth input control transistor is electrically connected to the negative plate of the fourth storage capacitor;
• and
• a second input control sub-circuit, wherein the second input control sub-circuit is electrically connected to a gate electrode of the fifth input control transistor, a gate electrode of the sixth input control transistor, a gate electrode of the seventh input control transistor, and a gate electrode of the eighth input control transistor, and the second input control sub-circuit is configured to turn on or turn off the fifth input control transistor, turn on or turn off the sixth input control transistor, turn on or turn off the seventh input control transistor, and turn on or turn off the eighth input control transistor.

A charge pump, comprising a voltage output end and a first step-up circuitry, wherein

• the first step-up circuitry comprises a first energy storage circuit, a second energy storage circuit, a first input control circuit, a first voltage application control circuit, a first output control circuit and a first charging path control circuit;
• the first input control circuit is configured to enable a first input voltage end to be electrically connected to, or electrically disconnected from, a first end of the first energy storage circuit, enable the first input voltage end to be electrically connected to, or electrically disconnected from, a second end of the first energy storage circuit, enable the first input voltage end to be electrically connected to, or electrically disconnected from, a first end of the second energy storage circuit, and enable the first input voltage end to be electrically connected to, or electrically disconnected from, a second end of the second energy storage circuit;
• the first voltage application control circuit is configured to enable the first end of the first energy storage circuit to be electrically connected to, or electrically disconnected from, a first voltage end, and enable the first end of the second energy storage circuit to be electrically connected to, or electrically disconnected from, a second voltage end;
• the first charging path control circuit is configured to enable the second end of the first energy storage circuit to be electrically connected to, or electrically disconnected from, the first end of the second energy storage circuit, and enable the second end of the first energy storage circuit to be electrically connected to, or electrically disconnected from, the second end of the second energy storage circuit;
• and
• the first output control circuit is configured to enable the second end of the second energy storage circuit to be electrically connected to, or electrically disconnected from, the voltage output end,
• wherein the charge pump further comprises a second step-up circuitry, wherein
• the second step-up circuitry comprises a third energy storage circuit, a fourth energy storage circuit, a second input control circuit, a second voltage application control circuit, a second output control circuit and a second charging path control circuit;
• the second input control circuit is configured to enable a second input voltage end to be electrically connected to, or electrically disconnected from, a first end of the third energy storage circuit, enable the second input voltage end to be electrically connected to, or electrically disconnected from, a second end of the third energy storage circuit, enable the second input voltage end to be electrically connected to, or electrically disconnected from, a first end of the fourth energy storage circuit, and enable the second input voltage end to be electrically connected to, or electrically disconnected from, a second end of the fourth energy storage circuit;
• the second voltage application control circuit is configured to enable the first end of the third energy storage circuit to be electrically connected to, or electrically disconnected from, a third voltage end, and enable the first end of the fourth energy storage circuit to be electrically connected to, or electrically disconnected from, a fourth voltage end;
• the second charging path control circuit is configured to enable the second end of the third energy storage circuit to be electrically connected to, or electrically disconnected from, the first end of the fourth energy storage circuit, and enable the second end of the third energy storage circuit to be electrically connected to, or electrically disconnected from, the second end of the fourth energy storage circuit;
• and
• the second output control circuit is configured to enable the second end of the fourth energy storage circuit to be electrically connected to, or electrically disconnected from, the voltage output end,
• wherein the charge pump further comprises:
• an output capacitor, a positive plate of the output capacitor is electrically connected to the voltage output end, and a negative plate of the output capacitor is electrically connected to a fifth voltage end;
• and
• a switch control circuit electrically connected to the first end of the second energy storage circuit and the second end of the fourth energy storage circuit, and configured to enable the first end of the second energy storage circuit to be electrically connected to, or electrically disconnected from, the second end of the fourth energy storage circuit.