Abstract: To assuredly determine whether a shutter pinches a disk in a disk device including a shutter at a disk insertion slot. A shutter control device 10 includes a pinch determining unit 14 that determines whether the disk is pinched by the shutter based on a position of the shutter during a process of closing the shutter, and a sensitivity changing unit that sets sensitivity of determination to be high as ambient temperature of a shutter driving mechanism increases.

Abstract: During a process of closing of a shutter of a disk device, a position of the shutter is detected. A first shutter position indicator indicative of a first position of the shutter and a second shutter position indicator indicative of a second position, which is immediately before the first position, are calculated. Whether a disk is pinched by the shutter is determined based on comparison of a predetermined threshold and the difference between the first shutter position indicator and the second shutter position indicator.

Abstract: A controller 27 controls the driving member 2 to move the conveyer 23 as a second member to a target position of the receiving rack 10 as a first member in the other direction after moving the conveyer 23 over the target position when the conveyer 23 is moved in one direction to align the conveyer 23 with the target position. After the conveyer 23 is moved over the target position and when the conveyer 23 is moved in the other direction, the controller controls the conveyer 23 to move by a distance of a mechanical error at a time, and then to move intermittently to the target position for aligning the conveyer 23 with the target position.

Abstract: During a process of closing of a shutter of a disk device, a position of the shutter is detected. A first shutter position indicator indicative of a first position of the shutter and a second shutter position indicator indicative of a second position, which is immediately before the first position, are calculated. Whether a disk is pinched by the shutter is determined based on comparison of a predetermined threshold and the difference between the first shutter position indicator and the second shutter position indicator.

Abstract: To assuredly determine whether a shutter pinches a disk in a disk device including a shutter at a disk insertion slot. A shutter control device 10 includes a pinch determining unit 14 that determines whether the disk is pinched by the shutter based on a position of the shutter during a process of closing the shutter, and a sensitivity changing unit that sets sensitivity of determination to be high as ambient temperature of a shutter driving mechanism increases.

Abstract: An information recording medium conveyer is provided, which provides countermeasures against power interruptions with high reliability. When a power interruption occurs during a loading operation with a conveying roller, the first unloading operation is initiated. When the outputs from detection sensors satisfy a predetermined condition during the first unloading operation, the process is initialized to cause the conveying roller to initiate a re-loading operation, thereby loading an information recording medium into a tray. On the other hand, when the outputs from the detection sensors do not change in accordance with a predetermined sequence during the re-loading operation, the process initiates the second unloading operation.

Abstract: An apparatus for reproducing an optical recording medium includes a system controller. If a digital audio signal is present in a shockproof memory, the system controller sets a first search target address so as to be connected to an absolute time address of a digital audio signal which is last accumulated in the shockproof memory. If there is no digital audio signal in the shockproof memory, the system controller calculates a second search target address based on the absolute time address of the digital audio signal which is last accumulated in the shockproof memory and an elapsed time since no digital audio signal remains in the shockproof memory, and moves the optical pickup to a position on the disk indicated by the second search target address calculated.

Abstract: An apparatus for reproducing an optical recording medium includes a system controller. The system controller causes a reproduction processor to first execute an initial setup process of reading out audio data from a disk and then to execute a reproduction process. When digital audio data is accumulated in a shockproof memory, the system controller causes the reproduction processor to suspend reading of the audio data from the disk and execute an automatic adjustment process. After the automatic adjustment process is finished, the reproduction processor resumes the reading of the audio data from the disk using adjustment values acquired through the automatic adjustment process executed.

Abstract: A medium detecting device determines whether a medium is set in a device. The medium detecting device includes an optical sensor irradiates a light towards a position where the medium is possibly set, collects a reflected light, and outputs a signal based on the reflected light. A temperature sensor measures temperature around the optical sensor. A threshold selecting unit selects a threshold from among a plurality of thresholds based on the parameter. A determining unit determines whether the medium is set based on comparison of the signal and the threshold selected.

Abstract: An output of an optical sensor in the initial state, that is, when a disc is absent, is set as a reference value. A threshold for detecting the disc is calculated by adding a predetermined variation to the reference value. When the output of the optical sensor exceeds the threshold, it is determined that the disc is present.

Abstract: During an ejecting or unloading operation of an information recording medium by a conveying roller, if detection signals are output from detecting sensors indicating that the object being ejected or unloaded has already been discharged from an insertion hole although it has not, then the insertion hole is closed by the door. If, for some reasons, the door fails to close the insertion hole within a predetermined time, the conveying roller performs a forcible ejecting operation, whereby the object left inside is forcibly ejected to the outside. Thus, ejection or unloading of a medium is carried out without failure.

Abstract: An information recording medium conveyer is provided, which provides countermeasures against power interruptions with high reliability. When a power interruption occurs during a loading operation with a conveying roller, the first unloading operation is initiated. When the outputs from detection sensors satisfy a predetermined condition during the first unloading operation, the process is initialized to cause the conveying roller to initiate a re-loading operation, thereby loading an information recording medium into a tray. On the other hand, when the outputs from the detection sensors do not change in accordance with a predetermined sequence during the re-loading operation, the process initiates the second unloading operation.

Abstract: During an ejecting or unloading operation of an information recording medium by a conveying roller, if detection signals are output from detecting sensors indicating that the object being ejected or unloaded has already been discharged from an insertion hole although it has not, then the insertion hole is closed by the door. If, for some reasons, the door fails to close the insertion hole within a predetermined time, the conveying roller performs a forcible ejecting operation, whereby the object left inside is forcibly ejected to the outside. Thus, ejection or unloading of a medium is carried out without failure.

Abstract: A gain controlling apparatus includes a pre-amplifier for roughly adjusting a gain of a generation signal, which is generated on the basis of a reception signal from an optical disc; a variable amplifier for finely adjusting the gain on the basis of the roughly adjusted gain by the pre-amplifier; a memory for storing a plurality of values for adjusting the gain generated during a previous occasion of gain adjustment in time series; and a controlling device for controlling the pre-amplifier at a current occasion of gain adjustment on the basis of the respective stored values for adjusting the gain and controlling the variable amplifier, wherein the controlling device comprises a predicting device for predicting a current adjustment value, namely an adjusted value for the gain roughly adjusted at the current occasion by the pre-amplifier, and the controlling device controls the pre-amplifier on the basis of the predicted current adjustment value.

Abstract: An apparatus for driving an optical pickup for a tracking servo control. The apparatus includes an emitting device disposed in the optical pickup for emitting a main beam to a first position on an information track of a recording medium and emitting at least two subsidiary beams to a second position and a third position on the information track of the recording medium, respectively. The positions of the main beam and the subsidiary beams are determined appropriately for a three beam method.