Abstract: An apparatus for ejecting liquid droplets, including: ejecting head main body having a plurality of nozzle rows; a pressure generation chamber; a pressurization section for giving pressure to the pressure generation chamber; and plural drive circuits corresponding to the nozzle rows, each drive circuit including: a first storage section for storing the ejection data corresponding to a nozzle row; a first latch section for storing the ejection data from the first storage section; a second latch section for storing the ejection data from the first latch section; and a drive section for driving the pressurization section based on the ejection data stored the second latch section; and a control section, which ensures that a timing for storing the ejecting data into the first latch section is synchronized among the nozzle rows, and a timing for storing the ejecting data into the second latch section can be adjusted independently.

Abstract: An inkjet recording head for ejecting ink, having a plurality of piezoelectric sidewalls to form a plurality of ink channels; a piezoelectric bottom plate; and a plurality of electrodes All of the ink channels are divided into two or more groups of ink channels composed of ink channels between which at least one ink channel is sandwiched; wherein an ink ejection operation is performed successively in a time-sharing mode for each of the group of ink channels, while satisfying the condition of |CTC+CTE|?10 (%); where a crosstalk between ink channels in one group due to a compliance ratio of the sidewalls to the ink in the ink channel is CTC; and a crosstalk between ink channels in one group due to a leak of electric field caused by electric voltage applied to the electrodes is CTE.

Abstract: An inkjet recording head for ejecting ink in ink channels by deformation of the piezoelectric element, comprising: a partition wall, formed by making grooves in an actuator substrate made of a polarized piezoelectric element, for forming longitudinal side surface of a plurality of ink channels; a cover plate adhered on an upper surface of the partition wall to form a top surface of the plurality of ink channels; a nozzle plate, adhered on a front side surface of the actuator substrate, having a nozzle hole for ejecting ink, wherein the cover plate is made of a machinable ceramics, which has a higher thermal conductivity than that of the piezoelectric element, and where Lc and Lp respectively represent the linear thermal expansion coefficient of the cover plate and the piezoelectric element, the relationship of, |Lc?Lp|?5×10?6/° C. is satisfied, and a top plate having higher thermal conductivity than the cover plate is provided on the cover plate.

Abstract: A liquid jetting device having: a recording head including a jetting energy generating element; a drive circuit generating drive signal for the element; a liquid detection sensor detecting a jetting characteristic value of liquid jetted from a nozzle; a drive voltage adjustment unit adjusting a voltage value of the drive signal; and a controller to control the drive circuit, the sensor and the drive voltage adjustment unit, wherein the controller performs control so that the liquid is jetted, and creates a correction data from the jetting characteristic value; and the controller performs control so that the voltage value is corrected based on a value obtained by multiplying the correction data by convergence coefficient within a range from 0.50 or more to less than 1.00, and repeats correcting the voltage value until a detection result of the liquid jetted based on the drive signal after the correction becomes a target value.

Abstract: The present liquid ejecting device adjusts the cross-talk amount to a range of ±15%, by providing: a recording head having actuators which generate the ejection energy for ejecting the liquid from a plurality of nozzles for each of the plurality of nozzles; a drive circuit to generate the drive signal for driving the actuator; and an adjusting circuit for adjusting at least one of the rising time constant and the falling time constant of the waveform of the drive signal to a time period more than 30 nsec and less than 150 nsec before the drive signal reaches the actuator.

Abstract: An inkjet head having: an inkjet head chip having ink jetting openings which are lined up to form a nozzle row on a front surface of the inkjet head chip; a manifold attached securely to a side of the inkjet head chip and leading ink to the inkjet head chip; and an ink heater which is in thermal contact through the manifold with ink in the manifold and which varies in heat generation density in a direction of the nozzle row.

Abstract: An inkjet recording head for ejecting ink, having a plurality of piezoelectric sidewalls to form a plurality of ink channels; a piezoelectric bottom plate; and a plurality of electrodes All of the ink channels are divided into two or more groups of ink channels composed of ink channels between which at least one ink channel is sandwiched;

Abstract: An inkjet recording head for ejecting ink in ink channels by deformation of the piezoelectric element. The inkjet head has: a partition wall, at least a part of which is formed with a piezoelectric element, for partitioning a plurality of tubular ink channels; a top wall for forming a top surface of the plurality of tubular ink channels by shielding and upper part of the plurality of tubular ink channels; and a bottom wall for forming a bottom surface of the plurality of tubular ink channels by shielding the bottom part of the plurality of tubular ink channels; wherein, at least a part of the top wall and the bottom wall is made of AlN—BN.

Abstract: A method of manufacture an ink jet head in which an ink is jetted from a nozzle hole by applying an electric voltage to an electrode so as to deform ink chambers divided by a partition wall. The method includes the steps of providing plural piezoelectric base plates having polarization side by side on a first non-piezoelectric plate, forming plural grooves for the ink chambers on the piezoelectric base plates and at connecting portions where each edge of the plural piezoelectric base plates provided side by side comes to face other edge; and mounting a second non-piezoelectric base plate on the plural piezoelectric base plates as so to cover the plural grooves so that the ink chambers divided by the partition wall are formed.

Abstract: An ink jet head to jet ink from a nozzle hole by applying an electric voltage to an electrode so as to deform a shape of a space forming an ink chamber, comprises two piezoelectric base plates given polarization; two non-piezoelectric base plates, wherein the ink chamber is formed by being enclosed by the two piezoelectric base plates facing each other and the two non-piezoelectric base plates facing each other; each of the two piezoelectric base plates comprising at least two lamination layers made of a piezoelectric material, wherein the two lamination layers are laminated such that the laminated surface is substantially parallel to the non-piezoelectric base plates and polarizing directions of the two lamination layers are opposite to each other; and electrodes provided on surfaces of the piezoelectric base plates and the non-piezoelectric base plates, wherein the surfaces face the ink chamber.

Abstract: An inkjet head is provided with a flexible printed circuit cable where a head body for ejecting ink and a connector are mounted at places different from each other, and the flexible printed circuit cable is bent between the head body and the connector so as to absorb tensile and pushing forces applied to the connector. The inkjet head is also provided with an ink ejecting portion for ejecting ink, a head-side connector and a supporting body or a cover for supporting or storing an electric connection portion or a flexible printed circuit cable interposed between the ink ejecting portion and the connector, and the head-side connector is supported by the supporting body or the cover so that the connector is movable in three-dimensional directions.

Abstract: An inkjet head is provided with a flexible printed circuit cable where a head body for ejecting ink and a connector are mounted at places different from each other, and the flexible printed circuit cable is bent between the head body and the connector so as to absorb tensile and pushing forces applied to the connector. The inkjet head is also provided with an ink ejecting portion for ejecting ink, a head-side connector and a supporting body or a cover for supporting or storing an electric connection portion or a flexible printed circuit cable interposed between the ink ejecting portion and the connector, and the head-side connector is supported by the supporting body or the cover so that the connector is movable in the three-dimensional directions.

Abstract: An image processing apparatus for compressing and decompressing image data. The apparatus includes: a composition circuit for composing composed data, having a predetermined bit width, from the given image data which correspond to spatially continuous pixels of an image; a compression circuit for compressing the composed data with Lempel-Ziv algorithm so as to obtain compressed data; a memory for storing the compressed data therein; and a controller for controlling the composition circuit and the compression circuit.

Abstract: An arrester in the shape of a tank has a cylindrical grounding tank as an outer casing to be arranged vertically in which an insulating medium is enclosed. In the grounding tank, a non-linear element group is disposed, the non-linear element group is formed by vertically stacking a plurality of non-linear resisting elements in series at a substantially axially central portion of the grounding tank. A shield having an umbrella-like shape is disposed on a high potential side of the non-linear element group. A shielding unit is operatively connected to a low potential side of the umbrella-shaped shield through a support member. The shielding unit comprises at least one shielding member having a spherical shape provided with a spherical surface portion facing an inner side wall of the grounding tank.

Abstract: A method for detecting a fluidity of powder includes the steps of: (a) making the powder come into contact with a surface of a piezoelectric element which is parallel with an oscillating direction of the piezoelectric element that generates traverse wave oscillations; (b) detecting electrical characteristics of the piezoelectric element under a condition of resonance; and (c) detecting the fluidity of the powder in accordance with a change in the electrical characteristics with respect to a reference value.

Abstract: A memory board includes a board, a RAM (random access memory), a back-up battery for supplying a back-up power to the RAM, and a switch to switch a power source from a main power to the back-up battery when the voltage of the main power drops below a predetermined value. The back-up battery is located at the same position where either the switch or the RAM is located and mounted to cover the switch or the RAM.

Abstract: An image reading apparatus including a diffraction grating element including a transparent plate shaped in the form of consecutive steps to separate a light reflected from a document into a zero order light, -1 order light, and +1 order light. The transparent plate is arranged so that the zero order light has a wavelength in a blue region and +1 order light and -1 order light have wavelengths either in green and red regions, respectively or in red and green regions, respectively.

Abstract: In an image sensor, photoelectric transducers each consisting of a pair of a photodiode and a blocking diode, each of which has a semiconductor layer of an amorphous silicon thin film and two opposing electrodes sandwiching the semiconductor layer therebetween, are aligned in an array on a single substrate and are driven by matrix-wirings. One of the two electrodes serves as a light-receiving side electrode and the other electrode serves as an ohmic contact electrode. One of the light-receiving side electrode and the ohmic contact electrode is formed common to the pair of the photodiode and the blocking diode. Each of the photodiode and the blocking diode is formed by a Schottky junction between the semiconductor layer and the light-receiving side electrode.

Abstract: In an image sensor having plural conversion elements for photoelectrically converting an image into electric signals and a matrix-wired electric circuit, connected to the plural conversion elements, for transmitting the signal therefrom, when reading out the image, all the plural conversion elements are reset at the same time. Thereafter, one of the plural conversion elements is sequentially selected in a predetermined order, and a signal from the selected conversion element is read out through the matrix-wired electric circuit.

Abstract: A transparent conductive optical device comprising a transparent conductive layer of a metal oxide on a substrate wherein the degree of oxidation of the transparent conductive layer is differentiated depending on the proximity to the substrate so that the degree of oxidation adjacent to the substrate is higher than the rest of the layer.