摘要:
While the excitation voltage of an ink jet nozzle is swept on the logarithmic scale, the generation state of ink droplets at a phase .theta..sub.k is examined. An excitation voltage value Vn generating an ink droplet of small diameter at the phase .theta..sub.k, an excitation voltage value Vn generating an ink droplet of large diameter at the phase .theta..sub.k, which is lower than vn, and an excitation voltage value Vn+1 generating an ink droplet of large diameter at the phase .theta..sub.k, which is higher than vn are stored. Difference values expressed asWn=vn-Vnwn=Vn-1-vnare derived on the logarithmic scale. Then the nozzle excitation voltage is set at such a value as to generate ink droplets and minimize the value of .vertline.Wn-wn.vertline..
摘要:
In an ink jet recording apparatus, an amplification-degree control circuit is associated with an amplifier circuit amplifying a detection signal indicative of the quantity of charge of charged ink droplets, so as to decrease the degree of signal amplification by the amplifier circuit when a charging signal is applied to a charging electrode charging the ink droplets, but to increase the degree of signal amplification by the amplifier circuit when the quantity of charge of the charged ink droplets is detected from the detection signal.
摘要:
In an ink-jet recording device in which a nozzle is so excited that ink droplets jetted from the nozzle are alternately separated into large-diameter ink droplets and small-diameter ink droplets, and recording ink droplets to be stuck onto the recording surface are made to fly straight while nonrecording ink droplets are charged and deflected to be retrieved by a gutter, there are provided a nonrecording ink droplet sense circuit and a correction signal generator circuit for generating correction charging voltage when an ink droplet to be controlled is generated provided that the preceding ink droplet is a nonrecording ink droplet and the ink droplet to be controlled is a recording ink droplet.
摘要:
An ink-jet printer including an ink jet nozzle for ejecting ink droplets onto the recording paper which is moved relative to the nozzle so that dots of ink are printed in the form of a pattern. The trajectory of flying ink droplets is deflected along the direction of the relative movement under control based on the measurement of the relative movement speed.
摘要:
An original reading apparatus reads out an original which is laid with its surface to be read being directed upward, to thereby convert the read information into an image information. The original reading apparatus has a digitizer function so that a partial reading region of the original is assigned and read out after operator's confirmation by direct observation from an upper side of the surface to be read of the original. A transparent plate on which is depicted reference coordinates for showing a readable region of the apparatus is provided in the vicinity of the original, and a position of the original is finely adjusted on the basis of the reference coordinates. A reading sensor and a carriage mechanism of the original reading apparatus are received in a rotatable upper cover of the apparatus. In case of a large size original, the information thereof is read without any fold or cut of the original.
摘要:
A nozzle head of an ink-jet printing apparatus according to the present invention comprises an ink reservoir for storing the ink supplied from an ink tank, a pump chamber provided between said ink reservoir and a nozzle for injecting ink particles, and a fluid diode provided between said ink reservoir and said pump chamber, which are all formed in a same substrate, wherein said pump chamber is caused to change its volume responsive to electric signals so that the ink stored therein is injected from said nozzle, and the ink is prevented from reversely flowing from said pump chamber to said ink reservoir when the volume of the pump chamber is changed, thereby to improve the frequency response of ink particles injected from the nozzle.
摘要:
An ink jet recorder in which ink droplets having different, large and small diameters are produced, only the small diameter ink droplets of the ink droplets are selectively charged and deflected to record dots on a recording medium. The property of the ink employed in the recorder is selected to meet the condition K.ltoreq.N.sup.n .times.T.sup.m (N represents the viscosity of the ink, T represents the surface tension thereof, and n, m and K are positive constants, respectively), thereby maintaining the diameter of the small diameter ink droplets at a substantially constant value in the operation temperature range of the recorder.
摘要:
A zinc-oxide-based conductive stacked structure 1 includes a substrate 11 and, formed on at least one surface of the substrate, an undercoat layer 12 and a transparent conductive film 13. The transparent conductive film is formed of a plurality of transparent conductive layers formed from a zinc-oxide-based conductive material and has a carrier density of 2.0×1020 to 9.8×1020 cm−3. The zinc-oxide-based conductive stacked structure exhibits a change ratio in sheet resistivity of 50 or less, after bending of the stacked structure around a round bar having a diameter of 15 mm, with the transparent conductive film facing inward.
摘要:
A method for manufacturing a liquid discharging head, the method including forming a plurality of nozzles that discharge liquid droplets, forming a plurality of piezoelectric elements that generate pressure for discharging liquid droplets from the respective nozzles; and performing a repolarization process on the piezoelectric elements to set non-uniformity of the droplet discharging characteristics of the nozzles to be in a predetermined range by combining adjustment of a polarization sensitivity and adjustment of a polarization voltage for each of the piezoelectric elements.
摘要:
A semiconductor device that can suppress variation of GND potential of a control board and prevent malfunction of IC without restricting a mounting direction of the IC of the control board is provided. In a power module 10 as a semiconductor device in which an insulating board 31 having a power switching element 24 and a control board 22 having IC 50 for controlling the power switching element 24 are vertically provided in a case body 19, GND pins 61 are provided at both the sides of the IC 50, a GND pattern 51 to which the GND pins 61 of the IC 50 are connected is provided in the control board 22, and a GND loop breaking slit 70 as a breaking portion for breaking a GND loop formed by electrical connection of the IC 50, the GND pins 61 at both the sides of the IC 50 and the GND pattern 51 is provided to the GND pattern 51.