| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 369440170 | Optical head element with rotary motion | 6 |
| 20080253239 | OPTICAL PICKUP AND METHOD FOR MANUFACTURING THE SAME - To increase the speed of operations and improve vibration properties by rotating holders to wind coils in objective lens driving means of an optical pickup. In an optical pickup wherein a tracking coil and two focusing coils are wound on the same surface of a coil holder, the coil holder includes a tracking coil holder and two focusing coil holders, and each of the tracking coil holder and two focusing coil holders has a hole passing through the center of each coil. | 10-16-2008 |
| 20080298182 | METHOD AND APPARATUS TO DETECT LAND/GROOVE SWITCH POSITION IN SEEK MODE, AND OPTICAL DISK DRIVE USING THE SAME - A land/groove switch position detecting method includes measuring information about a land/groove switch generation timing of a disc, using a first signal having a frequency that varies in proportion to a rotation speed of the disk in a normal playback mode, and a second signal having a predetermined frequency higher than the frequency of the first signal, and calculating a predicted land/groove switch generation position in the seek mode, using the information about the land/groove switch generation timing. | 12-04-2008 |
| 20080310262 | METHOD FOR AUTOMATICALLY CALIBRATING OUTPUT POWER OF OPTICAL PICK-UP HEAD AND OPTICAL DISC DRIVER USING THE METHOD - A method for automatically calibrating an output power of an optical pick-up head is provided. First, an optical disc is provided, wherein a relationship between the output power for writing the optical disc and a specific parameter corresponding thereto is defined as a first function. Next, the optical pick-up head is controlled to perform a writing operation on the optical disc according to an instruction value, and obtain the specific parameter corresponding to the instruction value. Next, the output power corresponding to the instruction value is obtained according to the first function and the specific parameter. Next, the instruction value is adjusted according to the instruction value and the output power, and the output power of the optical pick-up head is calibrated according to the adjusted instruction value. | 12-18-2008 |
| 20090086590 | SIGNAL CLAMPING DEVICE AND METHOD THEREOF AND RELATED OPTICAL STORAGE SYSTEM - The invention discloses a signal clamping device capable of clamping a signal with a clamp level that is set according to a frequency characteristic of the signal and a method thereof and a related optical storage system. The signal clamping device includes an equalizing unit, a determining unit, and a clamping unit. The equalizing unit is utilized for equalizing the signal and generating an equalized signal. The determining unit is utilized for generating an indication signal according to the equalized signal. The clamping unit is utilized for determining a clamp level according to the indication signal and clamping the signal with the clamp level. | 04-02-2009 |
| 20090196132 | Method for Improving Focus Accuracy of an Optical Pickup Head - The present invention discloses a method used in an optical disk drive for improving focus accuracy of an optical pickup head. Firstly, during each one revolution of the optical disk, RF | 08-06-2009 |
| 20140029399 | OPTICAL DISK DEVICE AND METHOD FOR CONTROLLING THE SAME - In an optical disk device, a technique for AC tilt correction with stability and following capability is provided in which, during an operation of a tracking servo mechanism, a lens shift amount obtained from a tracking control signal or a lens position error signal is measured for each of predetermined angles of rotation of an optical disk, and the measured values are averaged in a radial direction of the optical disk, and a tilt controller corrects an AC tilt based on the resulting average value. | 01-30-2014 |
