Abstract: An optical information recording medium 10 comprises: a plurality of recording layers 14, each of which undergoes a change in a refractive index by irradiation with a recording beam; and at least one intermediate layer 15 provided between the plurality of recording layers 14. The recording layer 14 and the intermediate layer 15 have different refractive indices, and, among interfaces between the plurality of recording layers 14 and the at least one intermediate layer 15, a recording layer 14 and an intermediate layer 15 disposed adjacent to the recording layer 14 at an incident side from which the recording beam enters the recording layer 14 are merged with each other at an interface (near-side interface 19) therebetween, whereby a refractive index gradually changes at the interface.

Abstract: Noise generation in transferring data is suppressed or prevented by transferring data at a data transfer rate according to the amount of data to be transferred to a memory. In a reproducing apparatus, when a read unit or both reads data from a storage medium or both, a determination unit determines the type of the storage medium from which the data is read, then, according to the determined type of the storage medium, a transfer rate change unit orders a data transfer unit to use a preset transfer rate corresponding to the type of the storage medium. The data transfer unit transfers the read data to the temporary storage unit at the ordered transfer rate. This allows data to be transferred without a significant change in the amount of data transfer, which suppresses or prevents noise.

Abstract: A disk drive is disclosed comprising a head actuated over a disk, a dynamic fly height (DFH) actuator operable to control a fly height of the head over the disk, and a touchdown (TD) sensor operable to generate a TD signal. A periodic control signal is applied to the DFH actuator to generate a periodic response in the TD signal comprising at least one cycle, wherein the cycle comprises a first half cycle and a second half cycle. An anti-correlation is computed between the first half cycle and the second half cycle of the TD signal, and the head contacting the disk is detected in response to the anti-correlation.

Abstract: A disk drive is disclosed comprising a disk, a head, and a voice coil motor (VCM) operable to actuate the head over the disk, wherein the VCM generates a back electromotive force (BEMF) voltage. At least one reference track is written on the disk, and the head is positioned near a first diameter of the disk. While moving the head from the first diameter toward a second diameter of the disk, the reference track is read and a first estimated state error is measured. While moving the head from the second diameter of the disk toward the first diameter of the disk, the reference track is read and a second estimated state error is measured. A gain and an offset of a velocity sensor are adjusted in response to the first and second estimated state errors.

Abstract: In one embodiment, the optical read/write apparatus includes a plurality of optical pickups arranged to cross tracks of an optical storage medium and a control section. On finding the data that has been written by any of those optical pickups inaccurate or on detecting any defect at a location where data is going to be written by any of the optical pickups, the control section instructs another one of the optical pickups to write that data on a different track from a track on which the data should have been written.

Abstract: Optical information recording medium 10 comprises: a plurality of recording layers 14 which undergo a change in refractive index by irradiation with recording beam; and an intermediate layer 15 provided between the recording layers 14. The intermediate layer 15 includes first intermediate layer 15A disposed adjacent to a recording layer 14 at a side opposite to an incident side from which recording beam enters the recording layer, and second intermediate layer 15B disposed adjacent to a recording layer 14 at an incident side from which the recording beam enters the recording layer. The first intermediate layer 15A and the recording layer 14 have different refractive indices, whereas the second intermediate layer 15B and the recording layer 14 have substantially the same refractive index. The first and the second intermediate layer 15A, 15B are merged with each other at an interface therebetween, whereby refractive index gradually changes at the interface.

Abstract: An apparatus including a first surface having at least one display, a second surface having at least one display, and a third surface having at least one display. The first, second and third surface form an outer surface of the apparatus, the outer surface being generally of a triangular shape.

Abstract: Disclosed is an improved DRAW technique for writing data on an optical storage medium and reading the data in parallel. In obtaining the optical power of a first light source 1, writing user data is temporarily suspended to write non-user data with a second light source 2 turned OFF.

Abstract: Methods and systems are described for correcting repeatable runout. In one aspect, an open loop tracking signal is received and squared. A discrete Fourier transform (DFT) of the squared open loop tracking signal is obtained. A velocity magnitude and an absolute value of the phase of the open loop tracking signal is determined. A RRO correction signal is iteratively constructed by performing a partial correction based on an initial phase selected and an initial velocity amplitude, measuring a relative velocity amplitude, performing a partial control correction using the initial phase and relative velocity amplitude if the amplitude is smaller than an initial amplitude or using the initial phase rotated by one hundred eighty degrees and the relative velocity amplitude if the amplitude is larger than an initial amplitude, and repeating the above steps until a tracking controller can perform closed loop control of the track to optical pickup unit velocity.

Abstract: A method of targeted corruption of user data in a shingled magnetic recording disk includes identifying user data on a Track_N targeted for corruption; identifying a readback centerline of the Track_N; identifying a readback centerline of an adjacent track to Track_N; acquiring user data of the adjacent track; and rewriting the user data of the adjacent track with an offset write centerline to overwrite magnetic material at the readback centerlines of both Track_N and the adjacent track.

Abstract: An optical recording medium includes: N recording layers (where N?4); a number of kinds of layer intervals between the recording layers adjacent to each other being an integer M equal to or less than a minimum integer equal to or more than log2(N); and one or more AB blocks including four recording layers with a first layer interval A, a second layer interval B, and the first layer interval A formed in order in the one or more AB blocks. When the M as the number of kinds of layer intervals is M?3, the optical recording medium has a part of a third layer interval C as a layer interval between a recording layer forming an AB block and a recording layer adjacent to the recording layer, the adjacent recording layer being included in other than the AB block including the recording layer.

Abstract: A capacitive position sensor is provided having a touch-sensitive area defined by a single-layer of electrodes arranged in a pattern along two axes. The electrode pattern includes a plurality of units each occupying a portion of the touch sensitive area along one axis. Each unit has at least three lines of elongate electrodes spaced apart in the one axis and extending for a length parallel to the other axis. The three lines of elongate electrodes in each unit comprise at least one line of drive electrodes and two lines of sense electrodes or at least one line of sense electrodes and two lines of drive electrodes. Selected electrodes of each unit are arranged in interconnected groups, each group having electrodes from more than one line which have partially overlapping extents along their length.

Abstract: A position control method of an optical pickup head of an optical disc drive is provided. The optical disc drive has an optical pickup head for reading data from an optical disc and a step index for controlling the movement of the optical pickup head. The position control method includes: calculating a first position information of the optical pickup head according to the step index; reading an address information from the optical disc, calculating a second position information of the optical pickup head according to the address information; determining whether a difference between the first position information and the second position information is greater than a predetermined value; updating the step index when the difference is not greater than the predetermined value; moving the optical pickup head to an initial position when the difference is greater than the predetermined value, and setting the step index as zero.

Abstract: An optical disc apparatus includes: a light irradiation/reception section to irradiate an optical disc recording medium with light via an objective lens and receive return light of the light; a tilt adjustment section to tilt the lens; a focus servo control section to exert focus servo control over the lens; a focus bias application section to apply a focus bias to a focus servo loop; a tracking direction error signal generation section to generate a tracking direction error signal representing an error between light-reception signals; and a control section to perform a tilt adjustment value search process for making a search for a tilt adjustment value with which the tracking direction error signal is maximized, a tilt adjustment value revision process for revising the tilt adjustment value found by the tilt adjustment value search process, and an adjustment control process for causing the tilt adjustment section to perform tilt adjustment.

Abstract: The wavelength is monitored using a spectrum analyzer in a state where a semiconductor laser is being driven while changing the light-emitting time of the semiconductor laser. When the internal temperature of the semiconductor laser estimated from a measured wavelength falls out of a preset temperature range, a gimbal assembly is identified as a defective product.

Abstract: An optical disc apparatus includes: a chassis; an optical pickup that is movably disposed on the chassis; a flexible member including wiring, which extends out from the optical pickup; and a wall portion that is provided in a standing manner at one end portion of the chassis. In the optical disc apparatus, an opening that allows the flexible member to be disposed in a bent state is formed through the chassis, and a first cutout is formed at the wall portion so as to be continuous with the opening.

Abstract: A recording wavelength generator selects control parameters of a recording pulse sequence, based on combinations of mark length, a first space length of a first space immediately before the mark, and a second space length of a second space immediately after the mark. A laser drive circuit records the marks by the recording pulse sequence. The first and second space lengths are classified into m and n types, respectively. An absolute value of a difference between two predetermined control parameters from among (m×n) control parameters selected during recording on a second information layer located on an incidence side of the laser beam with respect to a predetermined first information layer from among N information layers is equal to or greater than an absolute value of a difference between two predetermined control parameters from among the (m×n) control parameters selected during recording on the first information layer.

Abstract: An optical disc device and a recording method is provided in which information can be additionally recorded on an optical disc, which has a servo layer and recording layers separately formed, by accurately correcting a relative angle between a light beam and the optical disc used in the previous recording without providing an area where recording is not performed while maintaining the stability of tracking servo. The above subject can be solved by studying with high accuracy the relative angle between the optical disc and the optical axis used in the previous recording by applying a radial tilt servo according to a signal from the recording layers with the tracking servo applied by the servo layer. Further, the additional recording can be performed stably by fixing the radial tilt at the previously studied angle when the recording is performed.

Abstract: One embodiment of an apparatus for capacitive sensing and capacitive measuring having a digital circuitry (16) which has a digital input port P1 communicating with a capacitive sensing element (10). A resistance element (12) forms an electrical pathway between the sensing element and a signal generator (18) by electrically communicating with both. The signal generator outputs adjustable singles to charge and discharge the sensing element. The voltage Vc of the sensing element at the input port P1 will cause logic level change between “1” and “0” inside the digital circuitry when passing through the logic threshold of the digital circuit. The digital circuitry measures the time between the logic level changes and the reference points of the signals, and then calculates the capacitance or the capacitance change. The digital circuitry can be a microcontroller and the signal source can be the microcontroller's output port. Other embodiments are described and shown.

Abstract: An LCD and a touch display panel that can be integrated in the LCD are provided. The touch display panel comprises an active device matrix substrate that includes multiple sensing lines disposed on multiple data lines correspondingly and arranged parallel thereto, and multiple sensing devices formed on multiple scan lines. When an external pressure is exerted, a current is generated in the sensing lines, and the X and Y coordinates of the touch point is determined from a slight leakage current generated in the scan lines. The conventional external touch screen LCD device is substantially improved in response accuracy of the touch coordinates, material costs, and mechanical thickness.