Abstract: A variation in a signal line voltage is suppressed. A signal line drive circuit drives a plurality of signal lines, and the signal line drive circuit includes: a reference voltage generation unit that generates a reference voltage whose voltage level changes with time in a first period before the plurality of signal lines is driven; a current holding unit that is provided to correspond to the signal line and holds a current corresponding to a load of the signal line and a temporal change of the reference voltage; and a current control unit that causes the current held by the current holding unit to flow through the corresponding signal line in a second period after a lapse of the first period to generate a drive voltage of the signal line.

Abstract: A variation in a signal line voltage is suppressed. A signal line drive circuit drives a plurality of signal lines, and the signal line drive circuit includes: a reference voltage generation unit that generates a reference voltage whose voltage level changes with time in a first period before the plurality of signal lines is driven; a current holding unit that is provided to correspond to the signal line and holds a current corresponding to a load of the signal line and a temporal change of the reference voltage; and a current control unit that causes the current held by the current holding unit to flow through the corresponding signal line in a second period after a lapse of the first period to generate a drive voltage of the signal line.

Abstract: To improve display quality in a case where pixels are driven by using a ramp wave voltage.

Abstract: A comparator circuit according to the present disclosure includes a first switch section that selectively takes in a signal voltage, a second switch section that selectively takes in a control waveform, a differential amplifier including a non-inverted input end connected to each of output ends of the first switch section and the second switch section, a capacity section including one end connected to an inverted input end of the differential amplifier and the other end supplied with a reference voltage, and a third switch section that selectively short-circuits the inverted input end and an output end of the differential amplifier.

Abstract: A comparator circuit according to the present disclosure includes: a first switch section that selectively takes in a signal voltage; a second switch section that selectively takes in a control waveform; a differential amplifier including a non-inverted input end connected to each of output ends of the first switch section and the second switch section; a capacity section including one end connected to an inverted input end of the differential amplifier and the other end supplied with a reference voltage; and a third switch section that selectively short-circuits the inverted input end and an output end of the differential amplifier.

Abstract: A comparator circuit according to the present disclosure includes: a first switch section that selectively takes in a signal voltage; a second switch section that selectively takes in a control waveform; a differential amplifier including a non-inverted input end connected to each of output ends of the first switch section and the second switch section; a capacity section including one end connected to an inverted input end of the differential amplifier and the other end supplied with a reference voltage; and a third switch section that selectively short-circuits the inverted input end and an output end of the differential amplifier.

Abstract: A comparator circuit includes a differential circuit unit which detects a difference between two input signals, a current supply unit which supplies a current to the differential circuit unit, and a control unit which detects an operation timing of the differential circuit unit and controls the current supplied to the differential circuit unit by the current supply unit according to a detection result thereof.

Abstract: A comparator circuit includes a differential circuit unit which detects a difference between two input signals, a current supply unit which supplies a current to the differential circuit unit, and a control unit which detects an operation timing of the differential circuit unit and controls the current supplied to the differential circuit unit by the current supply unit according to a detection result thereof.

Abstract: A comparator circuit includes a differential circuit unit which detects a difference between two input signals, a current supply unit which supplies a current to the differential circuit unit, and a control unit which detects an operation timing of the differential circuit unit and controls the current supplied to the differential circuit unit by the current supply unit according to a detection result thereof.

Abstract: A transport apparatus includes a correction mechanism, a detector, and a meandering attenuator. The detector detects a widthwise position of elongated strip-shaped printing paper. The correction mechanism corrects the widthwise position of the printing paper, based on a detection result from the detector. The meandering attenuator is disposed upstream or downstream of the correction mechanism as seen in a transport direction. The meandering attenuator includes a plurality of attenuation rollers rotating while being in contact with the printing paper. When the printing paper passes over the attenuation rollers, the meandering of the printing paper is attenuated by the friction between the attenuation rollers and the printing paper. Thus, meandering exceeding the correction capability of the correction mechanism and new meandering occurring in the correction mechanism are attenuated.

Abstract: A comparator circuit according to the present disclosure includes: a first switch section that selectively takes in a signal voltage; a second switch section that selectively takes in a control waveform; a differential amplifier including a non-inverted input end connected to each of output ends of the first switch section and the second switch section; a capacity section including one end connected to an inverted input end of the differential amplifier and the other end supplied with a reference voltage; and a third switch section that selectively short-circuits the inverted input end and an output end of the differential amplifier.

Abstract: A comparator circuit includes a differential circuit unit which detects a difference between two input signals, a current supply unit which supplies a current to the differential circuit unit, and a control unit which detects an operation timing of the differential circuit unit and controls the current supplied to the differential circuit unit by the current supply unit according to a detection result thereof.

Abstract: Disclosed herein is a signal line drive circuit including: a positive voltage supply section; a negative voltage supply section; line buffers; a positive selector; a negative selector; and an output selector, wherein the positive selector is arranged on one side, the negative selector on other side, the positive voltage supply section on the one side, and the negative voltage supply section on the other side, in such a manner that they are symmetrical with respect to the line buffers.

Abstract: A method for writing servo patterns onto a disk of a disk drive. The method includes providing a plurality of different drive currents for an actuator while pushing the actuator into a crash stop defining a swing range of the actuator. The method also includes performing a write operation for at least one of the plurality of different drive currents to write a plurality of servo pattern tracks including a plurality of separate servo pattern sectors. Furthermore, the method includes gradually changing a drive current of the plurality of different drive currents while pushing the actuator into the crash stop so as to gradually move a read element in searching for a servo pattern track to a radial position different from a radial position of the write element. Moreover, the method includes positioning the read element at one of the plurality of servo pattern tracks.

Abstract: A method for writing servo sector sets that include a plurality of separate servo sectors on a disk so that servo sectors are present at same circumferential positions but different radial positions. The method includes reading a first servo sector set in a track with a read element such that the track includes first, second and third servo sector sets. The method also includes writing the third servo sector set with a write element at a different radial position from the read element with positional control and timing control using the first servo sector set while skipping the second servo sector set if all servo sectors of the first servo sector set are non-defective. Moreover, the method includes using positional control and timing control using the second servo sector set in the writing of the third servo sector set if the first servo sector set includes a defective servo sector.

Abstract: Disclosed herein are a digital-to-analog converter and a video display device. The digital-to-analog converter includes a converting section. The converting section has a code converting section, a reference voltage generating section, a plurality of transistors, and a plurality of gate electrodes. The video display device includes: a pixel section; a plurality of signal lines; one resistor string; and a plurality of converting sections.

Abstract: Disclosed herein is a signal line drive circuit including: a positive voltage supply section; a negative voltage supply section; line buffers; a positive selector; a negative selector; and an output selector, wherein the positive selector is arranged on one side, the negative selector on other side, the positive voltage supply section on the one side, and the negative voltage supply section on the other side, in such a manner that they are symmetrical with respect to the line buffers.

Abstract: A method for writing servo sector sets that include a plurality of separate servo sectors on a disk so that servo sectors are present at same circumferential positions but different radial positions. The method includes reading a first servo sector set in a track with a read element such that the track includes first, second and third servo sector sets. The method also includes writing the third servo sector set with a write element at a different radial position from the read element with positional control and timing control using the first servo sector set while skipping the second servo sector set if all servo sectors of the first servo sector set are non-defective. Moreover, the method includes using positional control and timing control using the second servo sector set in the writing of the third servo sector set if the first servo sector set includes a defective servo sector.

Abstract: Disclosed herein is a digital-to-analog converter. The digital-to-analog converter includes: a higher resistor string; a lower resistor string; an operational amplifier; a higher selector; a lower selector; a first switch; a higher capacitor; a second switch; a third switch; and a control circuit.

Abstract: A method for writing servo patterns onto a disk of a disk drive. The method includes providing a plurality of different drive currents for an actuator while pushing the actuator into a crash stop defining a swing range of the actuator. The method also includes performing a write operation for at least one of the plurality of different drive currents to write a plurality of servo pattern tracks including a plurality of separate servo pattern sectors. Furthermore, the method includes gradually changing a drive current of the plurality of different drive currents while pushing the actuator into the crash stop so as to gradually move a read element in searching for a servo pattern track to a radial position different from a radial position of the write element. Moreover, the method includes positioning the read element at one of the plurality of servo pattern tracks.