摘要:
An air intake apparatus configured to combine air filtered separately through a plurality of air cleaners and lead it to a single throttle body suppresses or prevents variation in the pressure of airflow introduced from a plurality of intake paths to the single throttle body. Outside air is introduced to the plurality of air cleaners by a single air cleaner inlet. The air cleaner inlet has a chamber of a predetermined capacity which has a single intake duct, and a plurality of branching passages which branch off from the chamber into the same number as there are air cleaners and are connected to the separate air cleaners.
摘要:
An inkjet printer whose ink discharge characteristic will rarely change even when used for a long period of time is developed. The inkjet printer has a pressure chamber and a piezoelectric actuator and a controller. The piezoelectric actuator has a first electrode, a first piezoelectric film, a second electrode, a second piezoelectric film, and a third electrode, and they are laminated together in this order. The piezoelectric actuator forms a portion of the wall defining the pressure chanter. The controller applies ink discharge signal between the first and second electrode, ink discharge signal comprises advanced voltage change from a predetermined voltage to the lower voltage and subsequent voltage change from the lower voltage to the predetermined voltage. Ink can be effectively discharged by applying the ink discharge signal, but the ink discharge signal could change piezoelectric characteristic in the second piezoelectric film due to the deformation of the first piezoelectric film. The additional signal applying the second piezoelectric film via the second and the third electrode can reduce the changes of the piezoelectric characteristic. As a result, changes of ink discharge characteristic can be prevented.
摘要:
An inkjet printer whose ink discharge characteristics will rarely change even when used for a long period of time is developed. The inkjet printer has a pressure chamber, a piezoelectric actuator forming a wall of the pressure chamber and a controller for applying voltage to the piezoelectric actuator. The controller applies a predetermined voltage in general, and the piezoelectric actuator is usually deformed to project toward the pressure chamber. Ink discharge signal comprises an advanced voltage change from the predetermined voltage to zero and a subsequent change from zero to the predetermined voltage. The characteristics of the piezoelectric actuator will change if the piezoelectric actuator is continuously deformed during ink non-discharge period. The controller applies an additional signal including an advanced change from the predetermined voltage to a lower voltage and a subsequent change from the lower voltage to the predetermined voltage. The piezoelectric actuator is periodically loosened from the deformed state during non-discharge period, and the change in the characteristics of the piezoelectric actuator over time can be reduced.
摘要:
A plasma display apparatus and a driving method of a plasma display panel which can improve a gradation expressing ability at low luminance. A magnesium oxide layer containing a magnesium oxide crystal which is excited by irradiation of an electron beam and performs a cathode luminescence light emission having a peak in a wavelength range of 200 to 300 nanometers is provided in each of display cells formed on the plasma display panel. When driving for a plurality of subfields having different luminance weights is performed, a sustaining discharge is caused only once in the subfield having the minimum luminance weight.
摘要:
An ink-jet head having a passage unit including pressure chambers each having one end coupled to a nozzle and the other end to be coupled to an ink supply source. The pressure chambers are arranged along a plane to neighbor each other. The ink-jet head further includes actuator units attached to a surface of the passage unit for changing the volume of each pressure chamber. Each actuator unit includes pressure generation portions respectively corresponding to pressure chambers, and is formed to extend over the pressure chambers. The actuator units are arranged along the longitudinal direction of the passage unit so that each neighboring actuator units partially overlap each other in the lateral direction of the passage unit. Each actuator unit has a basic region where many pressure generation portions are formed in a matrix, and an additional region neighboring the basic region in the lateral direction of the passage unit. In the additional region, pressure generation portions are formed to correspond to a gap portion between the pressure generation portions in the basic region of the actuator unit and the pressure generation portions in the basic region of another actuator unit neighboring that actuator unit.
摘要:
A crystalline MgO layer is provided in a position facing a discharge cell formed in a discharge space between the front and back substrates. The crystalline MgO layer includes magnesium oxide crystals caused to emit ultraviolet light with a peak wavelength of between 230 nm and 250 nm by the action of ultraviolet light emitted from xenon in a discharge gas. A phosphor layer emits visible light by being excited by the ultraviolet light emitted from the magnesium oxide layer and the ultraviolet light emitted from the discharge gas.
摘要:
An inkjet printer has a reservoir unit including an ink supply port to which ink is supplied from the outside and an ink reservoir for storing the ink supplied from the ink supply port. Further, the inkjet printer has an air purging passage branched off from an area of an ink supply flow passage extending from the ink supply port to a manifold via the ink reservoir. The area is located downstream with respect to a filter; and an air purging valve capable of opening or closing the air purging passage. The air in the ink supply passage can be readily purged from the air purging passage.
摘要:
A piezoelectric sheet of an ink-jet head includes dummy individual electrodes in addition to individual electrodes which corresponds to respective nozzles. The dummy individual electrodes are in an outer periphery of the individual electrodes. FPC board applies drive voltage to the individual electrodes in a drive area, and deforms the area in the piezoelectric sheet in the direction of an ink pressure chamber, while the drive voltage is not applied to the individual electrodes of the non-drive area. When the dummy individual electrodes are formed in the non-drive area, a boundary area of the drive area and the non-drive area is uniformly fired when the piezoelectric sheet is manufactured. In the drive area, since surrounding structures of the respective individual electrodes become equal to one another, ink discharge characteristic is substantially uniform in the boundary area of the drive area and the non-drive area.
摘要:
Pressure chambers arranged in the form of a matrix along a plane form first and second pressure chamber columns arranged alternately in the plane and having nozzles connected on opposite sides respectively. Two adjacent pressure chamber columns constituted by a first pressure chamber column and a second pressure chamber column are arranged opposite to each common ink path. First connection holes formed in the pressure chambers of the first pressure chamber column and connected to nozzles and second connection holes formed in the pressure chambers of the second pressure chamber column and connected to nozzles are arranged side by side on opposite sides of a corresponding common ink path 5a. Between two adjacent common ink paths, first connection holes and second connection holes are arranged on a column.
摘要:
An actuator 120 is formed from nine piezoelectric sheets stacked in this order to give a laminated configuration. A common electrode 25 is formed on the upper surface of each piezoelectric sheet 122, 121b, 121d, 121f, 121g. A plurality of drive electrodes 24 are formed the upper surface of each piezoelectric sheet 121a, 121c, 121e, 123. The common electrodes 25, a cavity plate 14, and a cover plate 44 are all maintained at the same potential (0V). The lowermost piezoelectric sheet 122 formed with the common electrode 25 is located between the cavity plate 14 and the lowermost drive electrodes 24 on the piezoelectric sheet 121a. In this configuration, an ejection voltage applied to the drive electrodes 24 is reliably prevented from being applied to ink in a pressure chamber and/or the cavity plate 14, whereby reliable ink ejection is possible.