Liquid discharge head, liquid discharge device, dispensing device, and liquid discharge method

A liquid discharge head, comprising:

• a liquid discharge unit, which comprises a discharge port, a liquid retaining section configured to retain liquid to be discharged from the discharge port, and a displacement section configured to discharge the liquid retained within the liquid retaining section from the discharge port;
• a pair of liquid storage sections, which are configured to store the liquid and are each connected to the liquid retaining section in the liquid discharge unit so that the liquid can flow;
• a pair of liquid feeding sections that are connected to the pair of liquid storage sections and are configured to feed the liquid between the liquid storage section and the liquid retaining section;
• a pair of open and close sections that are each disposed at a flow path between the liquid feeding section and the liquid storage section and are configured to open and close the flow path;
• and
• a controller configured to control at least one selected from the group consisting of the pair of liquid feeding sections and the pair of open and close sections so that liquid surface height within the liquid retaining section is constant.

A liquid discharge head, comprising:

• a liquid discharge unit, which comprises a discharge port, a liquid retaining section configured to retain liquid to be discharged from the discharge port, and a displacement section configured to discharge the liquid retained within the liquid retaining section from the discharge port;
• a pair of liquid storage sections, which are configured to store the liquid and are each connected to the liquid retaining section in the liquid discharge unit so that the liquid can flow;
• a pair of liquid feeding sections that are connected to the pair of liquid storage sections and are configured to feed the liquid between the liquid storage section and the liquid retaining section;
• and
• a pair of open and close sections that are each disposed at a flow path between the liquid feeding section and the liquid storage section and are configured to open and close the flow path;
• wherein when liquid volume of the liquid within the liquid retaining section is smaller than a predetermined value, control for feeding the liquid from at least one of the pair of liquid storage sections to the liquid retaining section is performed.