Abstract: 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.

Abstract: A method for accessing data in solid state drive (SSD) is disclosed. The method includes: Receiving and buffering an access request; splitting the access request into a number of separate access requests each corresponding to a respective physical block; merging the separate access requests to form a reconfigured access request conformed to a flash operation mode; transmitting the reconfigured access request; accessing the reconfigured access request in a mode conformed to flash operation to increase access speed.

Abstract: An encoded calibrating plate is fixed on the working environment of the robot arm and has a chessboard pattern with each square in the chessboard pattern being an encoding. The encoding indicates direction or position on the encoded calibration plate. A visual system of the robot arm captures an image of the encoded calibrating plate, calculates the coordinates encoding of the encoded calibration plate, and positions the visual system to calibrate a positioning error of the robot arm and the visual system.

Abstract: 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.

Abstract: 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.

Abstract: 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 r

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A writing method for an optical disk drive includes receiving a command to write a disc; implementing an optimum power control (OPC) test for a predetermined data transfer rate to obtain a relation of a beta parameter to writing power; acquiring a writing power for the predetermined data transfer rate with a target beta parameter; calculating the energy area ratio of writing strategies for every data transfer rate; multiplying the energy area ratio by the writing power for the predetermined data transfer rate to produce the writing power for every data transfer rate; and compensating the writing power with automatic writing control.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.