Abstract: A feeding device of a slot-in disk drive is disposed in a casing of the disk drive and includes a traverse. A bolt is disposed on and protrudes from a side of the traverse. A flange extends from the side of the traverse near the bolt. A pre-stressed piece is a bended elastic body. One end of the pre-stressed piece is fixed to the flange of the traverse, and the other end is fixed to the casing. The pre-stressed piece presses the traverse downward by its elastic force. A slider includes a protrusion with a groove formed on a side of the protrusion. The bolt is inserted into and slides within the groove. The groove includes an unloading end, an inserting portion and a loading end. An opening is formed on the upper surface of the slider near the inserting portion for reducing the thickness of the disk drive.

Abstract: A writing method for a multilayer optical disc. The method includes: measuring and recording optimum internal gains obtained when the objective lens is located on each inner side of the pick-up head, respectively, checking the writing direction based on the specific writing direction on each data layer of the disc, selecting the inner optimum internal gain when the writing direction is toward outside, and selecting the opposite inner optimum internal gain when the writing direction is toward inside to minimize the offset of the tracking error signal.

Abstract: A focusing control method on a light-scribed disc firstly focuses a base voltage on a label side. Light summed signals are detected and recorded. The biggest light summed signal is determined, and subtracts the light summed signal of each spoke to form an error signal. The error signal is multiplied by a gain to form a gain signal. The base voltage adds the gain signal to form an upper referring voltage, and subtracts the gain signal to form a lower referring voltage. The label side is focused with the upper referring voltage and the lower referring voltage respectively. The light summed signals are detected and recorded, to determine the biggest light summed signal of each spoke. According to the corresponding voltage of the biggest light summed signals, a focusing control curve is approached to determine optimum parameters.

Abstract: A position detecting device of an optical drive utilizes a simple wire to connect a CPU of the optical drive to a latch part and a fixing part, such that the latch part, the CPU and the fixing part, which are original parts of the optical drive, form a detecting circuit. When the latch part clasps or releases a tray, the latch part latches or releases the fixing part to close or open the detecting circuit so that the CPU can correctly judge whether the tray enters for positioning, and thus start or shut down the optical drive. In addition, the members such as a flexible cable, a casing and a mainboard may replace parts of the wire to simplify the detecting circuit.

Abstract: A method for calibrating an actuator is provided. A reflective reference surface is set. An objective lens is shifted to several calibration positions along the tracking direction in the actuator, focusing is performed at each position, and the shift volt and the focus volt are recorded. The focus volt at a calibration position is set as a standard focus volt, and the focus volt bias at the other calibration position with respect to the standard focus volt is calculated. A focus volt bias curve is formed by curve-fitting the focus volt bias and the shift volt at each calibration position, and a focus volt bias is obtained to compensate the volt along the focusing direction.

Abstract: A backup method includes reading record information of an optical disc; when the reading operation fails, utilizing an optical disc drive to read backed up record information at a plurality of specified positions in the lead-out area; checking a status of a session as a preparation for following recording; utilizing the optical disc drive to record data into a session on the optical disc; updating record information of the optical disc to generate an updated record information when recording of the session is completed and simultaneously recording the updated record information including a TOC block within the lead-in area of the optical disc to a plurality of specified positions on the optical disc according to different data types of the record information to serve as backed up record information; and ending a recording operation of the session.

Abstract: A protection device of a slot-in optical disk drive is provided. The protection device is disposed between two linking parts of the slot-in optical disk drive. One of the two linking parts is formed with a slot, and the other one of the two linking parts is connected to an upper end of a guide pin. A lower end of the guide pin protrudes and is inserted into the slot, and a portion of the guide pin corresponding to a side of the slot is formed with a notch. As the notch engages with the slot, the situation that the guide pin slides out of the slot can be avoided.

Abstract: The invention provides a jam-proof device of a slot-in optical disk drive. In the jam-proof device, a contact pin protrudes from one end of the loading bar, the other end of the loading bar is pivoted with a pivot on a first side of the casing, and a block protrudes adjacent to the pivot. One end of the unloading bar is pivoted on a second side of the casing opposite to the first side, and a reception end is formed at the other end of the unloading bar to extend to a center of the casing. A distance between the block and the reception end at a default position is shorter than a diameter of an 8-cm disc to prevent the disc from entering the slot-in optical disk drive.

Abstract: A method and an apparatus for capturing encoded signals on a label surface. A pick-up head is utilized to detect all or predetermined codes on a control feature zone of a label surface of a Light Scribe disc so as to generate a sub-beam added signal. A calculation unit is used to calculate the average value of the sub-beam added signals. A dynamic slicer, which could dynamically set its standard value at a half of the average value of the sub-beam added signals, slices the sub-beam added signals and captures the encoded signals. A processor decodes the encoded signals and translates those into Light Scribe disc's information.

Abstract: A recovery method for recording to a write-once disc. The recovery method includes: sequentially reading data within a plurality of Data Control Blocks corresponding to respective sessions on the write-once disc; utilizing data included in the Data Control Blocks to establish address information corresponding to each closed session; determining whether the write-once disc is finalized or not according to existence of a lead-out zone; reading a TOC (table of content) block of a TOC area; utilizing the address information stored in a memory of an optical disc drive to recover the TOC block and then storing the TOC block into the memory of the optical disc drive as data of the TOC block prepared for the next recording operation when reading the TOC block fails and the write-once disc is not finalized; and completing the loading operation of the write-once disc to make the write-once disc enter a recordable status.

Abstract: A traverse of a light scribe disk drive is provided. An opening is disposed at the center of a frame, wherein one end of the opening has a half circle, and a fillister is integrally formed around the half circle. A spindle motor is mounted on a PCB to form a spindle motor module. The PCB with a connecting slot is disposed on the frame to insert the spindle motor into the half circle. An optical sensor is mounted on a substrate to form an optical sensor module, and the substrate is inserted in the fillister. One end of a cable is connected to the substrate, and the other end is connected to the connecting breach to simplify the structure.

Abstract: The present invention is to provide an apparatus and method for calibrating focus balance in an optical disk drive. A focus servo unit controls a pick-up head to focus and read a mark for generating an RF signal. A jitter generator separates a jitter signal from the RF signal to form a jitter frequency. A focus balance unit compares sequential jitter frequencies to check the convergence and the goal, and determines the direction and variable of calibrating focus balance to generate an error signal. A compensator receives the error signal through the focus servo unit to control the pick-up head for calibrating focus balance.

Abstract: A method for identifying a layer number of an optical disc is provided. Firstly, a SA value is adjusted to a standard SA value of each of two data layers in sequence. Next, focusing courses are performed so as to enable the focus point to pass through the optical disc. Then, maximum amplitudes of focusing error signals in the focusing courses are recorded. After that, whether the maximum amplitudes of the focusing error signals recorded in the focusing courses are equal is checked. If the maximum amplitudes are equal, the optical disc is identified as a double-layered disc. If the maximum amplitudes are not equal, the optical disc is identified as a single-layered disc.

Abstract: An insertion-proof device for optical disk drive is provided to prevent other discs from being inserted in the operating disk drive. A slider moves back and forth along the optical disk drive to load and unload a disc. A push head is disposed on one end of the slider near an entrance. A protrusion is extended backward from the protection unit and disposed on the moving path of the slider. At least one supporting arm is extended from the protection unit. After a disc is loaded, the push head pushes the protrusion, so that the protection unit rotatably fixed near the entrance is turned upward to cover part of the entrance to prevent other discs from being inserted in the operating disk drive. When unloading a disc, the push head releases the protrusion, so that the protection unit leaves the entrance for the original position.

Abstract: An electrostatic discharge protection apparatus disposed in an optical disk drive includes a spindle motor and a feeding mechanism for driving a pick-up head. The mechanism includes a sled motor for driving the pick-up head. A traverse is disposed in a casing of the optical disk drive for disposing the motor and the mechanism. The electrostatic discharge protection apparatus is an elastic sheet disposed at one end of the spindle motor adjacent to the sled motor and includes a main body and several strips extending from the main body. The main body is connected with a metal fixing plate of the spindle motor. One strip contacts the sled motor, another strip contacts the guide bar, and another obliquely protruding strip penetrates and contacts a base plate and presses against the casing. A big electrostatic discharge sink is formed to buffer the transient impact caused by high electrostatic charges.

Abstract: An ejection device of a slot-in optical disc drive includes a rotating plate and an elastic unit. The rotating plate is installed on the slot-in optical disc drive and attached to an actuating gear of a feeding gear unit. The actuating gear is capable of following the rotation of the rotating plate to disengage from the feeding gear unit of the slot-in optical disc drive. The elastic unit is attached to the rotating plate to keep the actuating gear engaged with the feeding gear unit. A push wall of the rotating plate and a push block of a sliding piece, connected with the output of the feeding gear unit, are located sequentially on the path of a hole penetrating into the optical disk drive. A stick can be inserted into the hole to activate the ejection device.

Abstract: The invention is to provided an emergency ejection device for a slot-in optical drive, which utilizes a feeding motor to rotate a transmission shaft from one end of the transmission shaft without self-locking. The other end of the transmission shaft extending to the front of the drive forms as a pincer-like slot, and a worm is disposed between the two ends. One end of a gear set having a plurality of gears drives a clamping unit, and the other end rotates a roller. A worm wheel is disposed on one of the gears in the middle of the gear set and is engaged with the worm with self-locking so that the transmission shaft can be rotated by hand to eject a disk.

Abstract: The invention provides a protection cover of a pick-up head provided on a traverse of an optical drive. A plate flatly is positioned on an upper surface of the traverse, and the plate has a slot, with one end of the slot fastened to a spindle motor to clamp a disc and the other end of the slot forming a staying part for the pick-up head to stay in a stand-by mode. The pick-up head is disposed in the slot and has an objective lens. When the objective lens stays in the staying part out of a periphery of a 12-cm disc, the protection cover crosses over the staying part to protect the objective lens.

Abstract: The invention provides a cooling device for the feeding motor of a pick-up head on a traverse covered a protection plate. The protection plate disposes a long slot along the major axis of the traverse. One end of the long slot disposes a spindle rotating a disc above the protection plate. A feeding motor rotates a screw bar to move the pick-up head back and forward along the long slot. A diffuser is connected to at least one side of the upper surface of the feeding motor. An install recess on the protection plate faces the rotating disc and accommodates the upper surface and the diffuser to increase the cooling effect.

Abstract: The invention provides a traverse with a splash-proof device which disposes a spindle on one end of a body and is covered by a protection plate. A feeding device utilizes a feeding motor to rotate a screw bar, and two guiding bars, paralleling the screw bar are individually disposed on the two sides of the body. A pick-up head is disposed across two guiding bars and one side is driven h)y the screw bar to slide along the two guiding bars. The splash-proof device utilizes stick slices between the guiding bars and the protection plate to prevent lubricant from splashing.