A liquid discharge head according to the present invention includes a flow passage member and a plurality of pressurizing sections. The flow passage member includes a plurality of discharge holes, a plurality of pressurizing chambers respectively connected to the plurality of the discharge holes, a plurality of first flow passages respectively connected to the plurality of the pressurizing chambers to supply liquid to the plurality of the pressurizing chambers, a plurality of second flow passages respectively connected to the plurality of the pressurizing chambers to collect the liquid from the plurality of the pressurizing chambers, and a plurality of third flow passages respectively connected to the pressurizing chambers to supply the liquid to the pressurizing chambers. A plurality of the pressurizing sections respectively pressurizes the plurality of the pressurizing chambers.

Provided are a painting robot system that may perform painting well not only on a forward path but also on a backward path, and a painting method. An image processing portion (210) included in a painting robot system (11) creates image data for a forward path in a state of having first strip image data of a strip shape corresponding to nozzles (54A) in a first nozzle column (55A) and second strip image data of a strip shape corresponding to nozzles (54B) in a second nozzle column (55B), the image processing portion (210) creates the second strip image data as image data for a backward path in a state of deviating relative to the first strip image data, and the amount of position deviation is set as the following position: the Pth nozzle (54B) in the second nozzle column (54B) lands first relative to the Pth nozzle (54A) in the first nozzle column (54A) with an adjacent landing position at a distance of multiplying the number (N) by twice of the distance (L1).

A liquid ejecting head supported by a support body includes: a first head chip; a holder having a holding portion holding the first head chip and a flange portion; and a heater heating the holding portion, in which the holding portion has a heat receiving portion receiving heat from the heater, and a shortest path of heat transferred through the holder from the heat receiving portion to the flange portion is bent or curved at two or more points.

A liquid ejecting head includes: a plurality of head chips having a nozzle surface; a thermally conductive holder holding the plurality of head chips; a thermally conductive flow path structure provided with a flow path of a liquid supplied to the plurality of head chips; and a planar heater disposed between the holder and the flow path structure and along a direction parallel to the nozzle surface, in which the heater overlaps the plurality of head chips in a plan view.

A liquid ejecting head includes a first compression chamber row 11A on other side of a sub-manifold 5a, which extends in one direction, in other direction, and a second compression chamber row 11B on one side of the sub-manifold 5a in the other direction. First restricting-portion bodies 6Aa and second restricting-portion bodies 6Ba extend in a direction that crosses the one direction, and are alternately arranged in the one direction. First inlets 6Ab are on the one side of the second outlets 6Bc in the other direction. The first inlets 6Ab have an opening width greater than an opening width of the second outlets 6Bc. Channels of the second restricting portions 6B have a similar configuration.

A flow path structure includes: a substrate that includes a first surface and a second surface on a side opposite to the first surface; a supply port formed on the first surface; a plurality of discharge ports formed on the second surface; grooves that are formed on the first surface so as to extend in an X direction and communicate with the supply ports and with the plurality of discharge ports via through-holes formed on the substrate; and a sealing portion that is disposed on the first surface and seals each groove.

A flow path forming substrate in which an individual flow path which communicates with a nozzle opening that discharges liquid is formed; and a communication plate in which a recess portion which configures at least a part of a common flow path that is common to and communicates with the plurality of individual flow paths is provided to be open on a side opposite to the flow path forming substrate, are provided, the recess portion includes a first recess portion, and a second recess portion which is deeper than the first recess portion, the communication plate includes a supply path which is provided to be open on a bottom surface of the first recess portion, communicates with the recess portion and the individual flow path, and becomes a throttle portion that throttles a flow path with respect to the individual flow path, and a communication path which communicates with the individual flow path and the nozzle opening, and in the individual flow path, a throttle portion which throttles the individual flow path from a part that communicates with the supply path to a part that communicates with the communication path, is not provided.

An ejection surface extends in a first direction as a scanning direction and a second direction orthogonal to the first direction and is externally exposed. A plurality of nozzles opens at the ejection surface. A plurality of partial channels is located inside the ejection surface, and at bottom surfaces on a side of the ejection surface, the nozzles open. The plurality of nozzles is arranged in a direction intersecting with the first direction in plural rows to constitute a plurality of nozzle rows. The number of the nozzles arranged in each row is greater than the number of the plural rows. Between the nozzles in each nozzle row, the nozzles in other nozzle rows appear as seen in the first direction. A position of openings in the bottom surfaces of the partial channels differs across at least some of the nozzles in each nozzle row.

A flow path forming substrate has a pressure generation chamber communicating with a nozzle opening; and a communication plate having a supply path communicating with a manifold common to and communicating with the pressure generation chamber. A recess of the manifold opens opposite to the flow path forming substrate. The recess has a first recess, and a second recess deeper than the first recess. Supply paths are open on a bottom surface of the first recess, and are arranged in a first direction between the first and second recesses. An inclined surface inclined toward the bottom surface of the second recess from the bottom surface of the first recess is provided along the first direction. The inclined surface is configured as alternately repeated first and second inclined surfaces with different angles. A pitch of adjacent second inclined surfaces is smaller than a pitch of adjacent supply paths.

A liquid ejecting apparatus may include a flow path forming substrate in which a pressure generation chamber which communicates with a nozzle opening that discharges liquid is formed and a communication plate which has a supply path that communicates with a manifold. A recess portion which configures at least a part of the manifold is open on a side opposite to the flow path forming substrate, on the communication plate. The supply path includes a discharge supply path which communicates with a discharge pressure generation chamber that discharges liquid from the nozzle opening, and a dummy supply path which communicates with a dummy pressure generation chamber that does not discharge liquid from the nozzle opening.