QUANTA STORAGE INC. Patent applications |
Patent application number | Title | Published |
20160114486 | METHOD FOR AUTOMATICALLY RECALIBRATING A ROBOTIC ARM - A method for automatically recalibrating a robotic arm is provided. Firstly, the recalibration of a robotic arm is automatically activated at a pre-determined time. Then, an eye-in-hand (EIH) camera of the robotic arm is controlled and moved to one or a plurality of pre-determined orientations to focus and capture an image of an identifiable simple pattern, which is fixed with respect to a body of the robotic arm. Then, the detecting orientation of a movable portion of the robotic arm is calculated according to the captured image, and an error between the detecting orientation and the pre-determined orientation is obtained through comparison. Lastly, the error of the robotic arm is calibrated. | 04-28-2016 |
20160042758 | METHOD FOR DETERMINING PHASE DIFFERENCE OF TRACKING ERROR SIGNAL - A method for determining phase difference of tracking error (TE) signal is disclosed. The method includes following steps. An optical disc drive is activated to generate a TE signal. Amplitudes of the master push pull (MPP) signal, the secondary push pull (SPP) signal and the TE signal are measured. The phase difference between the MPP signal and the SPP signal of the TE signal is quickly calculated according to the law of cosine. | 02-11-2016 |
20150255147 | WRITING METHOD FOR SOLID STATE DISK - A writing method for a solid state disk is disclosed. The method comprises following steps: A writing unit is arranged in a buffer memory, wherein plane addresses of the writing unit are in one-to-one correspondence with non-volatile memories of the solid state disk. A writing data is received. A reordered plane address of the writing unit is obtained by using the residue of the logical allocation address of the writing data dividing the plane address number. Whether the reordered plane address is empty is checked. If the reordered plane address is not empty, the next plane address is shifted and the plane address is reordered. If the reordered plane address is empty, the writing data is buffered to the reordered plane address and the logical allocation address of the writing data is arranged in order. | 09-10-2015 |
20150217450 | TEACHING DEVICE AND METHOD FOR ROBOTIC ARM - A teaching device and a teaching method for a robotic arm are disclosed. The teaching device comprises a robotic arm, a control device and a gesture recognition module. The gesture recognition module detects a control gesture signal and transmits the detected control gesture signal to the control device. After receiving the control gesture signal, the control device teaches the robotic arm to move and switches between an arm movement mode and a hand movement mode. In an arm movement mode, the control device, aided by an arm ambient image shown on an eye frame and an arm control gesture, teaches an arm unit to move to a target at a high velocity. In the hand movement mode, the control device, aided by a hand vicinity image shown on an eye-in-hand frame and a hand control gesture, teaches a hand unit to move the processing target at a low velocity. | 08-06-2015 |
20140320405 | METHOD FOR CONTROLLING PORTABLE TERMINAL BY TOUCH DEVICE - A method for controlling a portable terminal by a touch device includes the following steps: connecting the touch device to the portable terminal, and recording a screen resolution of the portable terminal; displaying the same image on respective screens of the touch device and the portable terminal synchronously; resetting respective cursors on the respective screens to corresponding reference points concurrently; detecting an absolute coordinate of the cursor on the screen of the touch device in response to a press operation performed upon the screen of the touch device; calculating a relative displacement between the absolute coordinate and the corresponding reference point; transforming the relative displacement into a corresponding relative coordinate of the cursor of the portable terminal; transmitting the corresponding relative coordinate to the portable terminal over a wireless link; controlling the cursor of the portable terminal according to the corresponding relative coordinate; and resetting the respective cursors concurrently. | 10-30-2014 |
20140316571 | ARTICULATION MODULE FOR A ROBOT AND CONTROL METHOD FOR THE SAME - An articulation module for robot and a control method for the same are provided. A plurality of buffer springs are sleeved on a passive element sleeved on a reduction mechanism. A sensor is sleeved on the buffer springs to form a multi-sleeved articulation module. By detecting a difference angle of the distorted buffer springs, the motor is controlled to rotate along with a resistance direction for ensuring operation safety. | 10-23-2014 |
20140114501 | METHOD FOR CONTROLLING VEHICLE-MOUNTED DEVICE BY PORTABLE TERMINAL - A method for controlling a vehicle-mounted device by a portable terminal is provided. The method comprises the following steps. The vehicle-mounted device is turned on. A synchronous mode is started. Connection to the portable terminal is confirmed. The vehicle-mounted device is switched to the synchronous mode. An operation module is selected. A stored pattern of operation modes of the operation module is transmitted to the portable terminal. An operation module on the portable terminal is started for enabling the vehicle-mounted device to playback the function mode corresponding to the operation module and controlling the vehicle-mounted device by operating the operation mode on the portable terminal. | 04-24-2014 |
20130312016 | EMERGENCY EJECTION DEVICE FOR A SLOT-IN OPTICAL DISC DRIVE - An emergency ejection device is disclosed for a slot-in optical disc drive. A thin stick inserts into an ejection hole to rotate an ejection plate for an emergency ejection. A guide pin slides along a guide slot to rotate a release bar such that a clutch gear at the other end of the release bar departs from a self-locking power unit. Then the ejection plate moves a rack to rotate a ratchet unit at a predetermined direction for driving a transmission gear unit to unload a disc. | 11-21-2013 |
20130305266 | SLOT-IN TYPE OPTICAL DISK DRIVE - A slot-in type optical disk drive is disclosed. An inclined flange is protruded on the lower end of a guide pin. When ejecting a disc, a power unit moves a slider backward to push a shifting lever at one end of a detecting rod. The detecting rod is rotated to move the guide pin at the other end such that the inclined flange pushes the back edge of the disc to ascend along the inclined flange to avoid jamming. | 11-14-2013 |
20130290990 | CASING STRUCTURE OF SLIM OPTICAL DISK DRIVE - A casing structure of a slim optical disk drive is provided. The casing is formed by an upper casing and a lower casing. A notch is formed on the upper casing or the lower casing. The notch can receive a tag. The depth of the notch is larger than or equal to the thickness of the tag. The tag adhered to the notch does not cross over the notch and jut out from the casing, so that the gap is avoided and the noise is reduced. | 10-31-2013 |
20130263163 | EMERGENCY EJECTION PROTECTING MODULE FOR AN OPTICAL DISC DRIVE - An emergency ejection protecting module is disclosed to protect the emergency ejection device in an optical disc drive. When the optical disc drive reads/writes a disc, moving a protection door at the case to reveal an ejection hole causes an abnormal operation of the emergency ejection. The contact end protruded from the protection door activates a sensor to transmit an ejection signal to the optical disc drive, and the optical disc drive starts the ejection operation to protect the disc. | 10-03-2013 |
20130254784 | OPTICAL DISK DRIVE - An optical disk drive is disclosed to fix a main board in the casing and a second board under the tray. A flat cable on the bottom of the casing connects the main board with one end, and forms a bent portion to connect the connector of the second board at the other end. A cable protection device close to the connector is fixed under the tray to face the bent portion with an incline for preventing the bent portion from bending. | 09-26-2013 |
20130168540 | LIGHT GRATING STRUCTURE FOR A FORCE FEEDBACK DEVICE - The invention is to provide a light grating structure for a force feedback device, projecting a light beam from a light source through the pervious parts of a grating body to form pervious areas at a reception end, blocking the light beam by the shade parts of the grating body to form shade areas at the reception end, and increasing the grating distance to move the grating body close to the reception end and increasing the width of the shade part bigger than the pervious part to enable the width of the shade area to equal to the width of the pervious area. | 07-04-2013 |
20130162419 | FORCE FEEDBACK DEVICE - A force feedback device is provided. Several spring-sleeved screw bolts respectively pass through the suppression holes around the top cover to fix the top cover on the base. Each spring in the ladder-shaped suppression hole is suppressed between the nut of the screw bolt and the top cover. Since the body of the screw bolt is longer than a predetermined height of the suppression hole, an absorption gap is reserved between the nut and the top cover to provide a smooth feel in operating the joystick. | 06-27-2013 |
20130135473 | METHOD AND SYSTEM FOR VEHICLE SURVEILLANCE - A method and a system for vehicle surveillance are provided. The vehicle surveillance system integrates a global position system (GPS) and a vehicle recorder. The geographic coordinate of the current parking position is obtained by the GPS system. The vehicle surveillance system is turned off if the vehicle surveillance system is outside a predetermined radius of geographic coordinates of pre-saved non-safe parking positions. The activation of the vehicle surveillance system is maintained such that the vehicle is surveilled and its surrounding images are recorded in a selective and continuous manner if the vehicle surveillance system is within a predetermined radius of the geographic coordinates of non-safe parking positions. | 05-30-2013 |
20130099713 | METHOD FOR INCREASING ROTATION SPEED OF SPINDLE MOTOR - A method is disclosed to increase a rotation speed of a spindle motor, which comprises: setting a predetermined rotation speed; increasing the rotation speed of the spindle motor to the predetermined rotation speed; recording a critical rotation speed of the spindle motor; decreasing the rotation speed of the spindle motor to the critical rotation speed and remaining at the critical rotation speed for a predetermined time; and increasing the rotation speed of the spindle motor to the working rotation speed for eliminating vibration noise. | 04-25-2013 |
20120263027 | METHOD FOR DETERMINING PHASE DIFFERENCE OF TRACKING ERROR SIGNAL - A method for determining a phase difference of a tracking error signal is provided. The method includes: predetermining a plurality of phase differences, measuring MPP and SPP signals, establishing a phase difference curve by use of an amplitude ratio between (MPP+SPP) and (MPP−SPP), measuring MPP and SPP signals for a tracking error signal under test, calculating the amplitude ratio (MPP+SPP)/(MPP−SPP), and comparing with the phase difference curve to promptly determine the phase difference. | 10-18-2012 |
20120263026 | METHOD FOR DETERMINING ECCENTRICITY OF OPTICAL DISC - A method for determining an eccentricity of an optical disc is provided. The method includes predetermining a plurality of optical disc with known eccentric distances, respectively measuring a ratio of maximum and minimum amplitudes of a tracking error signal of the optical discs, establishing an eccentric distance ratio table or curve, measuring a ratio of maximum and minimum amplitudes of the tracking error signal for an optical disc under test, and comparing the measured ratio with the table or curve to promptly determine the eccentricity distance of the optical disc under test. | 10-18-2012 |
20120216221 | METHOD FOR CALIBRATING STEPS OF STEPPING MOTOR USED IN OPTICAL DISC DRIVE - A method for calibrating steps of a stepping motor used in an optical disc drive is provided. A pick-up head is moved to an origin of the structure. The pick-up head is moved toward a terminal of the structure by a stepping motor. The steps of the stepping motor are recorded until a counter electromotive force of the stepping motor is detected. A predetermined travel distance of the pick-up head is calculated. If the predetermined travel distance of the pick-up head is different from the maximum distance of the structure, then it is decided that the stepping motor has step error, and the steps of the stepping motor are calibrated. | 08-23-2012 |
20120216220 | CLAMPING DEVICE OF OPTICAL DISC - An optical disc clamping device is disclosed. Two concentric rotators with inward/outward rotation are disposed in the inner ring of a stationary seat, and a number of protruded slide grooves support the indented slide base for sliding, such that the stationary seat, the two rotators and the pressing plate are directly suspended to move together. The two-stage rotation enlarges the descent distance of the clamping device and directly descends the pressing plate for clamping the optical disc stably. | 08-23-2012 |
20120042329 | JAM-PROOF DEVICE OF SLOT-IN OPTICAL DISK DRIVE - 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. | 02-16-2012 |
20120036521 | OPTICAL DISC CLAMPING DEVICE - An optical disc clamping device is provided. A driving bar is moved away from a center hole to synchronously drive a first linking bar and a second linking bar. A first pivotal rod and a second pivotal rod are respectively driven by the first slider and the second slider to move towards the center hole to drive a carrier which carries a chucking disk disposed thereon to contact a spindle motor. A suppresser is fixed at the rim of the center hole to press on the chucking disk to clamp the disc stably. | 02-09-2012 |
20110292781 | METHOD FOR DETECTING OBLIQUITY OF OPTICAL DISC DRIVE - A method for detecting the obliquity of an optical disc drive is provided. The method includes the steps of calibrating balance gains of TE signals and CE signals with predetermined obliquities of the optical disc drive, curve-fitting and storing a relating function between the predetermined obliquities and the balance gains, calibrating the balance gains of signals for an installed optical disc drive, and acquiring an calibrated balance gain to find the obliquity of the optical disc drive from the relating function. | 12-01-2011 |
20110228655 | COMPENSATION METHOD IN RADIAL DIRECTION ON LABEL SIDE OF OPTICAL DISC - The disclosure discloses a compensation method in a radial direction on a label side of an optical disc. An optical disc is inserted into an optical disk drive. The data side of the optical disc is divided into at least one compensation area. An optical pick-up head (OPU) is moved from inner to outer rings by simulating a writing process. The OPU is moved to some pre-determined points and radial-directional compensation is performed to obtain radial-directional voltage gains at the pre-determined points. The voltage gains are recorded. The label side of an optical disc is inserted into the optical disk drive. The simulated track number is calculated on the basis of the required moving distance for the OPU to write pattern on the label side. The OPU is moved to write the label side by a radial-directional lens driving voltage compensated with a gain obtained from a compensation formula. | 09-22-2011 |
20110222385 | APPARATUS AND METHOD FOR TESTING SPOKE SENSOR - An apparatus and a method for testing spoke sensor are disclosed. A drive unit is started to rotate a test disc to a predetermined rotation speed. A module test unit is electrically connected to a spoke sensor under test of a spindle motor module. The module test unit is started to drive the spoke sensor to detect the spoke signals of the test disc and record the number of detected spoke signals. Within a test time, a comparison unit is used for comparing the number of spoke signals with a threshold, and only when the detected number is larger than a threshold will the spoke sensor be assembled to the product. Thus, the product quality is assured. | 09-15-2011 |
20110122753 | METHOD FOR DETERMINING FOCUS HEIGHT - A method for determining a focus height of an optical disc drive is provided. A disc is placed into the optical disc drive. An objective lens is moved to lock a focus on a data layer of the disc. The objective lens is radially moved from inner tracks to outer tracks, and at the same time the focus voltages at the radial position are recorded. A focus voltage curve is curve-fitted based on the recorded focus voltages. A corresponding refocus voltage is obtained from the focus voltage curve according to the radial position where a focus drop occurs. The objective lens is moved to the focus height by the refocus voltage for refocusing. | 05-26-2011 |
20110088049 | SLOT-IN OPTICAL DISK DRIVE WITH LIFTING EJECTION DEVICE - A slot-in optical disk drive with lifting ejection device is disclosed. A sliding device which has a first guiding slot and a second guiding slot is driven by a transmission unit. A sliding bolt protruded from a traverse is inserted into the first guiding slot, and the traverse connects with the sliding device. A lifting ejection device has a column vertically set in a housing and a sleeve which covers the column. A guiding pin protruded from the sleeve is inserted into the second guiding slot and is driven by the sliding device to disengage an optical disk. | 04-14-2011 |
20110072444 | Device for Adjusting Height of Guiding Bar in Slot-In Optical Disk Drive - A device for adjusting the height of a guiding bar in a slot-in optical disk drive is disclosed. The device is disposed on the guiding bar. One end of the guiding bar is pivoted on the pivot on a base plate in the slot-in optical disk drive, and the other end with a screw hole is protruded by a pin to suspend in the slot-in optical disk drive. The device passes through the screw hole to touch the base plate such that the end, with the pin, of the guiding bar is adjusted the height of the guiding bar by taking the pivot as a fulcrum. | 03-24-2011 |
20110038244 | WRITING METHOD FOR MULTILAYER OPTICAL DISC - 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. | 02-17-2011 |
20110002210 | METHOD FOR CALIBRATING ACTUATOR - 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. | 01-06-2011 |
20100281495 | PROTECTION DEVICE OF SLOT-IN OPTICAL DISK DRIVE - 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. | 11-04-2010 |
20100281492 | Slim Optical Disk Drive - 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. | 11-04-2010 |
20100260017 | Method and Apparatus for Capturing Encoded Signals on Label Surface - 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. | 10-14-2010 |
20100242057 | TRAVERSE OF LIGHT SCRIBE DISK DRIVE - 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. | 09-23-2010 |
20100177606 | METHOD FOR IDENTIFING A LAYER NUMBER OF AN OPTICAL DISC - 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. | 07-15-2010 |
20100077416 | SLOT-IN OPTICAL DISK DRIVE - 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. | 03-25-2010 |
20100077414 | SLOT-IN OPTICAL DISK DRIVE - A slot-in type disk drive fastens a clamping unit with two protrusions around its periphery on the central hole of a base plate. A front positioning part utilizes a stick to link a front right positioning bar and a front left positioning bar to synchronously open or close. A locking rod has a limiting pin inserted into an arc slot on the side of the base plate, and protrudes a locking end from the rear end. A rear positioning part utilizes an idle gear to link rear right and rear left positioning bars to synchronously open or close. The locking end can insert a first or second positioning recess on the rear left positioning bar and a touch block of the locking rod leans against the first protrusion. A lever is disposed on the rear right positioning bar to link a linkage plate set by one end. | 03-25-2010 |
20100077413 | Traverse with Splash-Proof Device - 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. | 03-25-2010 |
20100074093 | Protection Cover of Pick-Up Head - 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. | 03-25-2010 |
20100072836 | Cooling Device for Feeding Motor of Pick-Up Head - 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. | 03-25-2010 |
20100035450 | DOCKING STATION FOR PORTABLE PRODUCT - A docking station for a portable product is provided. The docking station has a body formed with an opening. A limiting block is formed on a bottom of the body to form a slide way. The limiting block and straight guide slots are on two opposite sides of the slide way. Through holes are formed around a connector in a docking cave. A slider of an ejection device on the slide way has oblique guide slots. A button is inserted into the opening to lean against an inclined surface of the slider. A push block is formed with a slide pin with two ends respectively inserted into the oblique and straight guide slots. A spring having both ends respectively pushing the body and fixed to the slider is for moving the slider to raise the button and locate the slide pin at a low end of the oblique guide slot. | 02-11-2010 |
20100008194 | READING METHOD AND DEVICE FOR OPTICAL DISK DRIVES - A reading method and a reading device for an optical disk drive, which reads data on a track of an optical disk, receives a host command to read required data, checks cache data, reads cache required data to respond to the command, sets the required data to a target track of the optical disk if no required data exists, calculates moving time for which an optical head is moved from a current position to the target track by way of track jumping and track skipping, respectively, compares the moving time for the track skipping and the track jumping with each other, selects one of the track jumping and the track skipping corresponding to the shorter one of the moving time, moves the optical head to the target track to read the required data and responds to the host command to enhance the reading efficiency. | 01-14-2010 |
20090285062 | Method for Rearranging Back-Up Data - The invention discloses a method for rearranging back-up data, which first starts rearranging a back-up area when a rewritable optical disc is loaded, reads all available replacing blocks on the back-up area, rearranges the order of the replacing blocks based on the order of addresses of corresponding data blocks on the user data area, writes the rearranged replacing blocks into a planned area of the back-up area, and registers the corresponding information to finish the operation of rearrangement for rapidly reading data. | 11-19-2009 |
20090285060 | METHOD OF ADJUSTING GAIN BALANCE OF OPTICAL TRANSDUCER - A method of adjusting gain balance of an optical transducer includes the following steps. First, two external gains are predetermined. Next, the projection position of a reflection spot is adjusted toward one side of the optical transducer, and the current output values of the optical transducer each corresponding to one of the external gains are measured, respectively, Next, the projection position of the reflection spot is adjusted toward the other side of the optical transducer, and the current output values of the optical transducer each corresponding to one of the external gains are measured, respectively. Then, a gain balance value of the optical transducer is adjusted, and is set as the external gain. Next, the projection position of the reflection spot is adjusted. Finally, the projection position of the reflection spot, where the current output value of the transducer is equal to 0, is locked to complete the adjustment rapidly. | 11-19-2009 |
20090165028 | Method and device for protecting slot-in optical disc drive - A method and device for protecting slot-in optical disc drive are provided. A first sensing switch is for detecting the action of an unloading unit, a second sensing switch is for detecting the action of a receiving unit, and a third sensing switch is for detecting the action of a positioning bar. A disc is inserted as the optical disc drive is at the initial state, and the states of the first, second and third sensing switches are detected. The transmission unit is activated to automatically load the disc as all sensing switches are turned on, and whether the state of the third sensing switch changes is checked. When the state of the third sensing switch changes, the extraction of the disc is detected, so the transmission unit is immediately reversed to execute the unloading of the disc, so as to protect the optical disc drive. | 06-25-2009 |
20090165027 | Rack Structure in an Optical Disk Drive - The invention is to provide a rack structure in an optical disk drive, which is formed integrally by pressing a metal plate. A connecting fixing part is disposed on a body. A brace is formed by bending down a periphery of the body. A convex or a concave trench is pressed near a front end of the body to form a secondary reinforcement. A reinforcement is formed by bending down near the middle of the front end of the body An elastic support is extended from the front end of the reinforcement and bent parallel to the front end of the body. A space is maintained between the elastic support and the body. A horizontal slot is pressed in the middle of the elastic support to form an upper support and a lower support. A first rack is disposed on one end connecting the upper support, of the lower support. The other end of the lower support is extended from the reinforcement to form a bending pivot. A second rack is formed on the other end of the upper support to enhance the engagement with the screw. | 06-25-2009 |
20090138899 | RESTRAINING DEVICE OF OPTICAL DISK DRIVE - The invention is to provide a restraining device of an optical disk drive in which a traverse is disposed. A transmission unit rotates a roller to, load/unload a disc, and drives a slider to move the roller. The transmission unit includes the restraining device moving with the roller. When the optical disk drive carries a disc, the slider moves to release the traverse and push down the roller to move the restraining device away from the vibration range of the traverse. When the optical disk drive does not carry a disc, the slider moves to restrain the traverse and release the roller to move the restraining device close to the front end of the traverse. The vibration range of the traverse is restrained to protect the gear teeth from damage. | 05-28-2009 |
20090135867 | Temperature compensation method for laser power of an optical disk drive - A temperature compensation method for laser power in an optical disk drive is provided. A predetermined linear-fitting power curve and a temperature-changing slope curve are previously stored in the optical disk drive. Firstly, an output of laser power is controlled according to the predetermined linear-fitting power curve to read/write data. Next, the temperature of the disk drive is detected. Then, whether the temperature has changed is checked. If the temperature has not changed, the method continues to read/write data. If the temperature has changed, the method obtains a relative slope from the slope curve by use of the temperature of the disk drive, displaces the slope of the predetermined linear-fitting power curve with the obtained relative slope to form a new linear-fitting power curve for replacing the predetermined linear-fitting power curve, and controls the output of laser power. | 05-28-2009 |
20090135865 | Method for controlling power of an optical disk drive - A method for controlling laser power of an optical disk drive is provided. Firstly, a power-controlling curve of a first loop circuit is formed according to a real test. Next, two test points are selected from the power-controlling curve. Then, the voltage outputted from a second loop circuit is adjusted. After that, whether the generated internal power signal is equal to the internal power signal of the two test points is checked. Afterwards, the voltage outputted from the second loop circuit is recorded. Then, the gain of the two loop circuits under the same change of the internal power signal is calculated. Lastly, a gained power-controlling curve of the first loop circuit is used as a power-controlling curve of the second loop circuit, such that the power-controlling curve is quickly obtained. | 05-28-2009 |
20090135695 | Method of detecting an abnormal disc - A method of detecting an abnormal disc is provided. Firstly, an objective lens is moved along a one-way path for enabling the light beam of the objective lens to pass through the data layer of a disc. Next, the path having RF signal is detected and recorded. Then, whether the terminal of the one-way path is reached is determined: if the terminal is not reached, the method continues to move the objective lens; if the terminal is reached, the method calculates the length of vibration path on which RF signal is detected. After that, whether the length of vibration path is larger than a path threshold is determined: if the length of vibration path is not larger than a path threshold, the disc is a normal disc; if the length of vibration path is larger than the path threshold, the disc is an abnormal disc. | 05-28-2009 |
20090100450 | GEAR HOLDER IN AN OPTICAL DISK DRIVE - The invention is to provide a gear holder in an optical disk drive, wherein a bolt upwardly protrudes from the bottom of a casing. A screw hole is disposed in the center of the bolt inserted by a wheel hole on the center of a gear. The height of the wheel hole is lower than the height of the bolt. A ring flange protrudes under the peripheral of a through hole disposed on a support cover. The width of the ring flange is equal to the width of the bolt, and the height thereof is equal to the height difference from the bolt to the wheel hole. The support cover is fastened on the bolt by a screw screwed in the screw hole, and then the gear is held and rotates between the casing and the support cover. The ring flange presses on the top of the bolt to maintain a rotation space. | 04-16-2009 |
20090097369 | Method for adjusting recording power - A method for adjusting recording power is provided. The addresses of changing recording velocity and section pause points are set. Then, the recording power in the inner circle is tested with the lowest rate, and the recording power on each high rate area is estimated. A required record data is recorded. Afterwards, whether the recording of the required record data is completed is determined. If confirmed, the recording process is terminated; otherwise, whether the recording velocity needs to be changed is determined. If confirmed, the recording is paused to change the recording velocity, otherwise, the recording process continues. The recording of required record data continues according to the estimated recording power and the recording power is tested to obtain an optimum recording power. Next, the recording power is adjusted to the optimum recording power to continue recording the rest of required record data, so as to enhance the recording quality. | 04-16-2009 |
20090078601 | CONTAINER FOR DISK DRIVERS - The invention provides a container for packaging disk drives comprising a lower cover and an upper cover. The lower cover is a thick, flat buffer having a rectangular carrier recess concavely disposed at the center of its top surface. The carrier recess is divided into a plurality of partition spaces by criss-crossing flat partition board. The lower end of the partition board is inserted into the carrier recess. An indent is disposed at the top end of each partition spaces. A plurality of vertical wings protrude from the center of each side of the partition board where the lower end of the wings sits on the edge of carrier recess of lower cover. The upper cover is a thick, flat buffer having a rectangular carrier recess concavely disposed at the center of its bottom surface. The carrier recess of the upper cover can cover the top end of partition board such that its edge can sit on the upper end of the wings to load more disk drives. | 03-26-2009 |
20090022947 | Wear-proof structure for a flexible circuit in an optical disk drive - A wear-proof structure for a flexible circuit disposed within a casing of an optical disk drive is provided. The casing has an entrance. A tray is disposed within the casing and its underside is covered by a protection plate. The protection plate has one end bent upwardly to form a tail with an arc-shaped cross-section. The flexible circuit includes a fixed portion and a movable portion. The fixed portion is immovably disposed on the casing. The movable portion is connected to one end of the fixed portion and extended toward the other end of the fixed portion to form a folded end with the fixed portion, and the folded end is immovably disposed near the entrance. A wear-proof layer is covered on the folded end; besides, the wear-proof layer has a wing outstretched the folded end and pasted on the casing to enhance the wear-proof ability of the flexible circuit. | 01-22-2009 |
20090003158 | Writing method for optical disk drive - A writing method for an optical disk drive includes the following steps. First, a write command and to-be-written data are received from a host. Next, a speed down flag is checked. If the speed down flag is true, a writing speed is decreased; or otherwise the to-be-written data is written into a data area. Next, the written data is read, and accuracy of the written data is verified. If the written data is not accurate, accurate data is re-written into a spare area, and the number of times of re-writing is counted and checked. If the number of times of re-writing is greater than a predetermined threshold value, the speed down flag is changed to true; or otherwise the procedure goes back to the data-writing step to repeat the above-mentioned steps. If the written data is read and verified as accurate, a write-end status is reported back to the host. | 01-01-2009 |
20090003150 | Method for calibrating focus balance of optical disk drive - A method for calibrating focus balance of an optical disk drive includes the steps of: zeroing a reference value; presetting a variable and a direction for calibrating the focus balance; generating a new C1C2 signal according to the preset variable for calibrating the focus balance; determining whether the value of the new C1C2 signal is larger than the value of a previous C1C2 signal or not by way of comparing, and changing the direction if yes or otherwise keeping the direction; and checking whether the value of the new C1C2 signal is larger than a threshold value C1C2 | 01-01-2009 |
20080285189 | Electrostatic discharge protection device for an optical disc drive - An electrostatic discharge protection device for an optical disc drive is provided. A rail disposed on the casing of the disc drive has an opening. A guide bar is slidable disposed on the rail. A conductive elastic plate is fixed around the opening on the rail. The elastic plate has an elastic-pressing end leaning against the guide bar through the opening, and a protrusion electrically contacting the casing. A tray supported by the guide bar to move in and out of the casing has an underside covered by a protection bottom plate. A conductive strip-shaped elastic element is fixed on the tray by a fixing screw, which fastens the protection bottom plate on the tray. As such, the elastic element is in contact with the protection bottom plate; besides, the elastic element also leans against the guide bar, so as to dissipate electrostatic discharge by the guide bar. | 11-20-2008 |
20080250438 | Emergency ejection device for a slot-in optical drive - An emergency ejection device in a slot-in optical drive includes a panel with a hole. A sliding part disposes a pushing block on the path which passes through the hole into the slot-in optical drive. A guiding groove is disposed between the hole and the pushing block. The sliding part links to a loading/unloading mechanism and a rack on the sliding part engages one end of a gear set. The gear set includes a plurality of gears engaging each other one by one for transporting the power. A worm gear with a lead angle larger than the self-lock critical angle, i.e. arctan (μ/cos B), engages the other end of the gear set. A stick can put into the hole to push the pushing block backward to move the sliding part for ejecting a disc. | 10-09-2008 |