Liquid discharging method, liquid discharging head, and head cartridge and liquid discharging apparatus using said liquid discharging head

A liquid discharging method of discharging liquid from a discharge port by a liquid discharging element in a first liquid flow path communicating with said discharge port for supplying said liquid to said discharge port, said method comprising the steps of:

• using a movable member for causing negative pressure to act on said first liquid flow path:
• providing said movable member displaceable with respect to said first liquid flow path only by disappearance of a bubble, wherein said negative pressure is caused to act by the displacement of said movable member, and said movable member is displaced in a direction away from said first liquid flow path by the disappearance of said bubble;
• and
• detecting presence/absence of the liquid using a detecting means provided near said discharge port, and the detection result in a state in which said movable member is not displaced and the detection result in a state in which said movable member is displaced are compared with each other to thereby detect the presence/absence of the liquid.

A liquid discharging head comprising:

• a discharge port for discharging liquid therethrough;
• a first bubble creating area for creating a first bubble in the liquid;
• a first liquid flow path provided with said first bubble creating area and communicating with said discharge port, the liquid in said first liquid flow path being discharged through said discharge port by creation of said first bubble;
• a second bubble creating area for creating a second bubble in the liquid;
• a second liquid flow path provided with said second bubble creating area;
• and
• negative pressure acting means using a movable member provided between said first liquid flow path and said second liquid flow path for causing only negative pressure to act in said first liquid flow path by the disappearance of said second bubble, wherein said negative pressure acting means is displaced in a direction away from said first liquid flow path by disappearance of said second bubble.