Abstract: According to one embodiment, an organic EL device includes an insulating substrate, a pixel electrode disposed above the insulating substrate, an organic layer disposed on the pixel electrode, a counter-electrode disposed on the organic layer, at least one of a first recess portion in which the organic layer and the counter-electrode are missing on the pixel electrode, and a second recess portion in which the counter-electrode is missing on the organic layer, and a protection film covering the counter-electrode and the at least one of the first recess portion and the second recess portion.

Abstract: An ink-jet print head has a piezoelectric ceramic plate having grooves for receiving ink, a nozzle plate connected to the piezoelectric ceramic plate and having nozzle apertures each disposed in communication with respective ones of the grooves, and an ink storing device for storing ink. An ink chamber plate is connected to the piezoelectric ceramic plate and has an ink chamber for supplying ink from the ink storing device to the grooves. A base plate is connected to a side of the ink chamber plate and has an ink reservoir defining a portion of an ink flow path for transporting ink from the ink storing device to the ink chamber of the ink chamber plate. The ink reservoir has at least one tapered portion progressively diverging in a direction toward the ink chamber of the ink chamber plate.

Abstract: Providing an ink-jet print head and ink-jet recording apparatus capable of preventing the dwell of air bubbles contained in ink and relatively easily removing the air bubbles. In an ink-jet print head 10 comprising a plurality of grooves 22 communicated with nozzle apertures 28; an ink chamber 26 for supplying ink to the individual grooves 22; and an ink reservoir 31 defining a communication portion of a flow path with the ink chamber 26, the flow path intercommunicating ink storage means for storing the ink and the ink chamber 26, the ink reservoir 31 includes at least one of a tapered portion 37 opened progressively wider toward the ink chamber 26 and a throttling portion 38 progressively narrowing the flow path toward the ink chamber 26.