Abstract: The amounts of liquid discharged from a liquid discharge head to predetermined areas can be made uniform while suppressing an increase in circuit size. In order to achieve this object, there is provided a liquid discharge apparatus which discharges a liquid from a liquid discharge head having a plurality of nozzles for discharging the liquid, wherein the liquid discharge head includes a subset of nozzles capable of individually controlling liquid discharge amounts, among the plurality of nozzles. The subset of nozzles is smaller in number than the total number of the plurality of nozzles.

Abstract: It is an object of this invention to make the amounts of liquid discharged from the nozzles of a liquid discharge head uniform. To achieve this object, there is provided a liquid discharge apparatus for discharging a liquid to a medium using a liquid discharge head having a plurality of nozzles for discharging the liquid, characterized by comprising a discharge amount changing device which can change the amounts of liquid discharged from the respective nozzles of the liquid discharge head independently of each of the plurality of nozzles, the discharge amount changing device including a voltage control device which can change a driving voltage value of a driving pulse to be supplied to each of the plurality of nozzles.

Abstract: It is an object of this invention to make the amounts of liquid discharged from the nozzles of a liquid discharge head uniform. To achieve this object, there is provided a liquid discharge apparatus for discharging a liquid to a medium using a liquid discharge head having a plurality of nozzles for discharging the liquid, characterized by comprising a discharge amount changing device which can change the amounts of liquid discharged from the respective nozzles of the liquid discharge head independently of each of the plurality of nozzles, the discharge amount changing device including a voltage control device which can change a driving voltage value of a driving pulse to be supplied to each of the plurality of nozzles.

Abstract: It is an object of this invention to make the amounts of liquid discharged from a liquid discharge head to predetermined areas uniform while suppressing an increase in circuit size. In order to achieve this object, there is provided a liquid discharge apparatus which discharges a liquid from a liquid discharge head having a plurality of nozzles for discharging the liquid, wherein the liquid discharge head includes nozzles capable of individually controlling liquid discharge amounts, among the plurality of nozzles, which are smaller in number than the total number of the plurality of nozzles.

Abstract: A linear image sensor includes N arrays of photoelectric converting pixels, wherein N is an even integer at least equal to 2. Each array is formed by arranging, with a predetermined pixel pitch in a first direction of the array, a plurality of pixels, and each of the pixels is so shaped that the area per unit length of the pixel decreases progressively from the center of the pixel both in the first direction of the array and in a second direction perpendicular to the first direction. The N arrays themselves are provided with a mutual distance from each other of M/2 times the pixel pitch in the second direction and are mutually displaced by 1/N of the pixel pitch in the first direction so as to form a mutually interpolating arrangement, wherein M is a positive integer equal to at least 1 and wherein M and N are independent of each other.

Abstract: A synchronizing pattern detecting apparatus includes a pattern matching device, a pulse generating device, a delay device and a determination device. The pattern matching device samples synchronizing patterns with an asynchronous clock to determine whether the synchronizing patterns match with predetermined patterns. The pulse generating device generates a plurality of pulse signals having predetermined widths in accordance with the synchronizing patterns when the pattern matching device determines successful pattern matching. The delay device delays the plurality of pulse signals output from the pulse generating device to substantially match the timings of the pulse signals with each other. The determination device synthesizes output signals from the delay device to determine a degree of matching of the synchronizing patterns from a synthesis result.

Abstract: In an information recording-reproducing apparatus for recording and/or reproducing data on an information recording data on medium, the data recorded from the recording data on medium is reproduced by utilization of partial response. The data for each predetermined block is modulated and recorded such that during waveform equalization in the partial response, the number of a plurality of level values present in L samples corresponding to one block of the data may become constant in each block.

Abstract: A digital information reproducing apparatus includes a reading device to read out digital information recorded on a recording medium; a first clock generator to produce a first clock synchronized with the digital information read out by the reading device; a second clock generator to generate a second clock of a predetermined frequency; a processing circuit to process the digital information read out by the reading device on the basis of the first clock produced by the first clock generator; and a switching circuit for switching from the first clock produced by the first clock generator to the second clock generated by the second clock generator and for outputting the second clock to the processor in a case when the frequency of the first clock produced by the first clock generator deviates from a predetermined range. The first clock generator includes a PLL circuit for inputting the digital information read out by the reading device and producing the first clock.