The patent's inventors are Lee, Hyun woo (
This patent was filed on
From the background information supplied by the inventors, news correspondents obtained the following quote: "The following description generally relates to an optical device recording or reproducing data on an optical device and an adjusting method thereof.
"In general, an optical disk refers to CD (Compact Disc)-ROM, CD-R, CE-RW, DVD (Digital Versatile Disc)-ROM, DVD-R, DVD-RW, and a recently-developed format of AVCHD, HD-DVD, and a Blu-ray Disc.RTM. using a bluish-violet laser light capable of higher density recording than the above optical discs, such as BD-R and BD-RE.
"Data is recorded or reproduced on the optical disk by an optical pickup including a laser diode as a light emitting source, a photo diode as a light receiving source, a diffraction grating forming a light path between the light emitting source and the light receiving source, a sensor lens, a mirror, and an objective lens.
"In the objective lens of the optical pickup, a focusing servo control is performed on a perpendicular direction of the optical disk, and a tracking servo control is performed on a circumferential direction of the optical disk. In the optical pickup, a track is traced, along a track formed along a circumferential direction of the optical disk, to input and output an optical signal corresponding to a pitch shape of a particular track.
"The optical disk placed on a tray is loaded on or unloaded from an optical device, and rotated by a spindle motor. The optical pickup is connected to a feed motor to linearly move to a radial direction of the optical disk along a guide rod. The spindle motor includes a stator wound with a coil and fixed to a bracket, and a rotor mounted with a magnet generating an electromagnetic force by interacting with the stator.
"In many instances, a problem may occur on a tracking servo or a focusing servo, if a skew angle, which is an angle of inclination or tilt angle (hereinafter referred to as tilt angle) of a rotation shaft in the spindle motor is twisted."
Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "The present disclosure has been made to solve the foregoing problem and, therefore, certain configurations or aspects described herein are to provide an optical device configured to adjust a skew angle of a spindle motor within a range to access an inner periphery and an outer periphery of an optical disk at a same condition and an adjusting method thereof.
"In order to achieve at least the above purpose, in whole or in part, and in accordance with the purposes of the disclosure, as illustrated and broadly described, and in one general aspect, there is provided an optical device, including a spindle motor configured to be mounted in a turn table on which an optical disk is attached and detached. The optical device includes a bracket configured to be secured with a stator of the spindle motor. The optical device further includes and a tray body configured to be directly connected to the bracket, wherein a skew angle of the spindle motor is adjusted by applying an external force to the bracket.
"In accordance with an aspect, an adjusting method of an optical device, includes securing a stator of a spindle motor on a tray body. The method also includes adjusting a skew angle of flatness of a bracket or a spindle motor while the bracket and one or more guide rods guiding a linear movement of an optical pickup are directly connected to the tray body.
"FIG. 1 illustrates an alternative E-architecture in the 3GPP TR 23.882 version 1.12-0, in accordance with an embodiment of the present invention.
"In accordance with an alternative aspect, there is provided an adjusting method of an optical device, including directly connecting a bracket on which a stator of a spindle motor is fixed and one or more guide rods guiding a linear movement of an optical pickup to a tray body. The method also includes selecting at least three reference points relative to the one or more guide rods to set-up a reference plane including the reference points. The method further includes measuring flatness of the bracket relative to the reference plane or a skew angle of the spindle motor. The method includes deforming the bracket by applying an external force to the bracket until a measurement value comes within a range.
"In accordance with an aspect, an optical device, includes a spindle motor configured to be mounted in a turn table on which an optical disk is attached and detached. The device includes a bracket configured to be secured with a stator of the spindle motor. The device further includes a tray body configured to be directly connected to the bracket. A skew angle of the spindle motor is adjusted by applying an external force to a surface of the bracket until a tilt angle of a measuring plane relative to a reference plane is within a range."
For the URL and additional information on this patent, see: Lee, Hyun woo; Kim, Hag Ryeol; Kim, Sang Hun; Kim, Hyouk. Optical Device and Adjusting Method. U.S. Patent Number 8645980, filed
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