Liquid ejecting head and liquid ejecting apparatus

A liquid ejecting head comprising:

• a plurality of head chips having a nozzle surface provided with a nozzle configured to elect a liquid;
• a thermally conductive holder holding the plurality of head chips;
• and
• a planar heater disposed at a position where the holder is interposed between the plurality of head chips and the heater and along a direction parallel to the nozzle surface, wherein
• each of the plurality of head chips is elongated along a first direction when the first direction and a second direction are two directions intersecting with each other along the nozzle surface,
• the plurality of head chips include a first head chip and a second head chip,
• the first head chip and the second head chip are disposed to be offset from each other in both the first direction and the second direction,
• the first head chip is in contact with a first side and a third side in a plan view and the second head chip is in contact with a second side in the plan view when the first side is one of four sides of a virtual rectangle circumscribing an aggregate of the plurality of head chips in the plan view, the second side is coupled to one end of the first side, and the third side is coupled to the other end of the first side,
• the heater overlaps the plurality of head chips in the plan view,
• a first region surrounded by the first side, the second side, the first head chip, and the second head chip in the plan view includes a first outside part positioned outside an outer edge of the heater,
• the first side has a first part defining the first region,
• the second side has a second part defining the first region, and
• the outer edge of the heater includes the plurality of head chips and intersects with both the first part and the second part in the plan view.

A liquid ejecting head comprising:

• a plurality of head chips having a nozzle surface provided with a nozzle configured to eject a liquid;
• a thermally conductive holder holding the plurality of head chips;
• and
• a planar heater disposed at a position where the holder is interposed between the plurality of head chips and the hearer and along a direction parallel to the nozzle surface, wherein
• each of the plurality of head chips is elongated along a first direction when the first direction and a second direction are two directions intersecting with each other along the nozzle surface,
• the plurality of head chips include a first head chip, a second head chip, a third head chip, and a fourth head chip,
• the first head chip and the second head chip are disposed to be offset from each other in both the first direction and the second direction,
• the third head chip and the fourth head chip are disposed to be offset from each other in both the first direction and the second direction,
• the first head chip is in contact with a first side and a third side in a plan view and the second head chip is in contact with a second side in the plan view when the first side is one of four sides of a virtual rectangle circumscribing an aggregate of the plurality of head chips in the plan view, the second side is coupled to one end of the first side, and the third side is coupled to the other end of the first side,
• the heater overlaps the plurality of head chips in the plan view,
• a first region surrounded by the first side, the second side, the first head chip, and the second head chip in the plan view includes a first outside part positioned outside an outer edge of the heater,
• the third head chip is in contact with the third side in the plan view and the fourth head chip is in contact with the second side and a fourth side in the plan view when the fourth side is one of the four sides of the virtual rectangle other than the first side, the second side, and the third side, and
• a second region surrounded by the third side, the fourth side, the third head chip, and the fourth head chip in the plan view includes a second outside part positioned outside the outer edge of the heater.