摘要:
A disk drive apparatus for a disk having helically-formed or concentric circle-like formed tracks includes a spindle motor for controlling a rotation of the disk; a pick-up device for recording or reproducing information on or from the disk; a stepping motor for moving the pick-up device in a radial direction of the disk in accordance with a drive current; a system controller for tracking a rotation speed of the spindle motor and for outputting command signals according to the rotation speed of the spindle motor; and a stepping motor controller for controlling the stepping motor by changing a slope of a rising part and a falling part of a waveform of the drive current of the stepping motor according to the command signals.
摘要:
In a DVD player, when data information in a DVD disk is played back, it is judged whether the data information is protected by a copyright or not on the basis of disk control information. Further, it is judged whether the DVD disk is writable or not, based on whether the DVD disk is provided with a wobble or not. Thus, if the data information is protected by the copyright and the DVD disk is writable, a playback of the DVD disk is prevented so that an illegal use of the DVD disk, which infringes the copyright, is effectively prevented.
摘要:
A driving circuit of a liquid crystal display device includes driver output lines connected to outputs of a data line driver, m pieces of block selection signal lines for sequentially selecting m pieces of blocks, and data lines for supplying data to a display area. A switch sequentially connects an ith driver output line to ith, i+2jth, . . . , and i+2jx(m−1)th data lines in response to signals on the m pieces of block selection signal lines when j is a positive integer smaller than m.
摘要:
A disk drive apparatus for a disk having helically-formed or concentric circle-like formed tracks includes a spindle motor for controlling a rotation of the disk; a pick-up device for recording or reproducing information on or from the disk; a stepping motor for moving the pick-up device in a radial direction of the disk in accordance with a drive current; a system controller for tracking a rotation speed of the spindle motor and for outputting command signals according to the rotation speed of the spindle motor; and a stepping motor controller for controlling the stepping motor by changing a slope of a rising part and a falling part of a waveform of the drive current of the stepping motor according to the command signals.
摘要:
A disk apparatus includes a pick-up for reading/writing signals from/on a disk; a pick-up base provided with the pick-up; a traverse motor for moving the pick-up in a radial direction of said disk; a feed screw rotated by the traverse motor and provided with a thread groove on its periphery; a rack having a fixing portion fixed to the pick-up base and a nut portion engaged with the thread groove; a guiding mechanism for guiding the pick-up movably in a radial direction of the disk; and a cantilever parallel spring for connecting the fixing portion to the nut portion of the rack, displaceably in a radial direction of the feed screw.
摘要:
A liquid crystal display device includes a display circuit having data lines and scanning lines arranged in two-dimensional matrix, and switching elements connected between the data lines and the scanning lines. A first inspection circuit is also provided, including an inspection voltage input and/or output terminal for inputting and/or outputting an inspection voltage to/from one ends of the data lines via a first analog switch. A second inspection circuit includes an inspection voltage input and/or output terminal for inputting and/or outputting an inspection voltage to/from the other ends of the data lines. The display circuit, the first inspection circuit, and the second inspection circuit are provided on one substrate, and the first inspection circuit is constructed to be separated from the rest of the display circuit.
摘要:
An information recording method of recording information, in which laser light is applied to a recording medium while depending on predetermined information said laser light is modulated and the intensity of said light is controlled to form recording mark areas at which reflectivity of said recording medium changes, depending on the intensity of said applied light, whereinbefore starting data recording, said light is applied to said recording medium at predetermined light intensity, reflection light from said recording mark areas of said recording medium is received, the amount of said reflection light is detected, and a light intensity controlling reference value is calculated on the basis of the amount of said detected light, andduring data recording, reflection light from said recording mark areas of said recording medium is received, the amount of said reflection light is detected, and a light intensity controlling detection value is calculated on the basis of the amount of said detected light, corrected light intensity is obtained from the difference between said light controlling intensity reference value and said light intensity controlling detection value, said light intensity controlling reference value is corrected depending on said corrected light intensity, and the intensity of said laser light is controlled so that said corrected light intensity controlling reference value substantially coincides with said light intensity controlling detection value.
摘要:
A liquid crystal display panel of the active matrix drive type is disclosed. Each pixel is provided with an storage capacitor, wherein capacitors for stabilizing the voltage are added to the common storage capacitor bus line that applies a predetermined potential to the storage capacitor bus lines provided for each of the rows to absorb noise that mixes into the storage capacitor bus lines through parasitic capacitances, thereby to decrease fluctuation in the voltage of the storage capacitor bus lines and to prevent the occurrence of display unevenness and crosstalk. Capacitors Ccs for stabilizing the voltage are added to a common storage capacitor bus line (vertical Cs line) 5 that applies a predetermined potential (storage capacitor bus line voltage Vcs) to the storage capacitor bus lines (horizontal Cs lines) 4 provided for each of the rows to form a common side of the storage capacitors Cs formed in each of the pixels. The capacitors Ces are formed by utilizing the common storage capacitor bus line (vertical Cs line) 5. The capacitors Ccs may be formed in the MOS structure.
摘要:
A display device includes a display unit of a dot-matrix type, each pixel of which has view-angle-dependent characteristics. The display device further includes a correction circuit which corrects the view-angle-dependent characteristics by changing a voltage of a video signal with respect to every at least one horizontal scan period.
摘要:
A display has a display panel of a first aspect ratio and is able to display on the display panel an image of a second aspect ratio whose width element is larger than that of the first aspect ratio. The display has a gate driver, a data driver, and a timing controller. The gate driver sequentially selects gate lines of the display panel. The data driver stores data for one gate line and supplies the data to one of the gate lines selected by the gate driver. The timing controller supplies control signals to the gate and data drivers so that predetermined data is displayed in top and bottom non-image areas of the display panel during a vertical blanking period. The display is capable of displaying images of different sizes.