| Patent Number |
Title Of Patent |
Date Issued |
| RE39025 |
Lens device including a light controlling mechanism and an optical pickup apparatus using a lens |
March 21, 2006 |
| A lens device which can be used as an objective lens in an optical pickup apparatus includes an objective lens provided along a light path facing a disc and having a predetermined effective diameter, and light controlling means provided along the light path for controlling the light in a |
| 7486596 |
Method and apparatus compensating for tilt |
February 3, 2009 |
| A method and apparatus for compensating tilt. The tilt compensation method includes: obtaining one of a jitter best, an RF envelope, and a focus DC offset (FODC) from a detection signal of the ROM data region and determining whether the obtained value is within a tolerance range; and |
| 7478411 |
Optical pickup actuator and method with multi-conductive suspension |
January 13, 2009 |
| An optical pickup actuator including a multi-conductive suspension. The optical pickup actuator may include a base, a holder fixed to the base, a bobbin holding an object lens and having a plurality of driving coils, and a plurality of suspensions connected between the bobbin and the |
| 7457226 |
Heat source having thermoelectric element, optical pickup assembly employing the same, and metho |
November 25, 2008 |
| A heat source having a device emitting heat, a case protecting and supporting the device, and a thermoelectric element absorbing the heat emitted from the device and dissipating the heat to an outside. |
| 7453656 |
Recording and/or reproducing apparatus with an optical pickup actuator having high thrust |
November 18, 2008 |
| An optical recording and/or reproducing apparatus with an optical pickup actuator having high thrust. The optical pickup actuator may include a lens holder which holds an objective lens and is movably supported by a supporting unit, and a magnetic driving unit which drives the lens holde |
| 7403458 |
Compatible optical pickup and light output amount detecting method performed in the compatible o |
July 22, 2008 |
| A compatible optical pickup, including first and second light sources for emitting lights with different wavelengths and first and second photodetectors for detecting an information signal and/or an error signal, and a method of detecting the amount of output light using the compatib |
| 7362689 |
Optical pickup and optical recording and/or reproducing apparatus adopting the same |
April 22, 2008 |
| An optical pickup which, when a first light reflected by a recording medium is divided into a central light area and first and second peripheral light areas at both sides of the central light area, divides the first light reflected by the recording medium into at least 6 light areas, |
| 7355953 |
Optical pickup for cutting off optical noise and optical recording and/or reproducing apparatus |
April 8, 2008 |
| An optical pickup includes a light source which emits light, a grating which separates a portion of the light emitted from the light source, a reflecting member which reflects another portion of the light emitted from the light source, a monitoring photodetector disposed on a traveling |
| 7343103 |
Apparatus and method for detecting beam power in optical drive |
March 11, 2008 |
| An apparatus and method for detecting beam power generated by a plurality of light sources, using a single device. The apparatus includes a light-receiving unit that receives the beam power generated by one of a plurality of light sources, and an amplifying unit that selects a gain, |
| 7283440 |
Tracking error signal detecting method selectively using a push-pull method, an improved push-pu |
October 16, 2007 |
| An optical recording/reproducing apparatus includes an optical pickup and a signal processor. The optical pickup includes an optical splitting device which splits light emitted from a first light source into a main light beam and sub-light beams which are symmetrical with respect to the |
| 7280458 |
Optical pickup apparatus and optimal light spot focusing method |
October 9, 2007 |
| An optical pickup apparatus includes a first light source to emit a first light beam having a predetermined wavelength, a first optical path changer to change a proceeding path of the first light beam, an objective lens to focus the first light beam on a recording medium, a diffraction |
| 7272103 |
Laser power monitor device, optical pickup including the same, and optical recording and/or repr |
September 18, 2007 |
| In order to improve the frequency characteristic of a laser power monitor device and the precision of laser power control when low-speed recording is performed, there is provided a laser power monitor device for an optical recording and/or reproducing apparatus, the laser power monitor |
| 7251209 |
Optical pickup and a wedge beam splitter |
July 31, 2007 |
| An optical pickup for a recording medium includes a light source, an objective lens, a main photodetector, and a front photodetector. The configuration of the optical pickup enables converging or diverging of light to be incident on a plate beam splitter so that light can be received |
| 7230905 |
Optical pickup using two-wavelength light source module and method for correcting position diffe |
June 12, 2007 |
| An optical pickup includes a light source module in which first and second light sources that emit first and second light beams of different wavelengths are integrated into a single package, an objective lens that focuses the first and second light beams to form a light spot on a rec |
| 7218598 |
Optical pickup using two-wavelength light source module |
May 15, 2007 |
| An optical pickup using a two-wavelength light source module includes a light source module, a collimating lens, and a first optical element. The light source module includes first and second light sources which emit first and second light beams of different wavelengths and are formed in |
| 7206266 |
Optical pickup, optical recording and/or reproducing apparatus including the same, and method fo |
April 17, 2007 |
| An optical pickup, optical recording and/or reproducing apparatus including the same, and a method of realizing a tracking servo that is compatible between different types of optical data storage media. The optical recording and/or reproducing apparatus splits light from a light sour |
| 7203148 |
Method and apparatus for identifying the type of optical recording medium |
April 10, 2007 |
| A method and an apparatus for identifying the type of an optical recording medium are provided. The method includes detecting a surface reflected signal S.sub.S and a writable-surface reflected signal S.sub.R of an optical recording medium while performing a focus search using a first |
| 7164626 |
Optical pickup using a wedge type beam splitter |
January 16, 2007 |
| A compatible type optical pickup using a wedge type beam splitter that can record and/or reproduce information on/from optical recording media having different formats. The compatible type optical pickup includes: a first light source that generates and emits a first light beam of a |
| 7072114 |
Optical pickup using an optical phase plate and which is compatible with optical recording media |
July 4, 2006 |
| An optical pickup apparatus having laser light sources emit a first light beam having a relatively shorter wavelength for a DVD and a second light beam having a longer wavelength for a CD-R, an objective lens having a focal length of an information recording surface in the DVD, an optica |
| 7068933 |
Apparatus and method for detecting beam power in optical drive |
June 27, 2006 |
| An apparatus and method for detecting beam power generated by a plurality of light sources, using a single device. The apparatus includes a light-receiving unit that receives the beam power generated by one of a plurality of light sources, and an amplifying unit that selects a gain, |
| 7016291 |
Optical recording and pickup head for digital versatile disc compatible with read-writable compa |
March 21, 2006 |
| An optical recording and pickup head having a flat plate lens of a staircase type diffraction grating structure is compatible with a DVD and a CD-RW. The optical recording and pickup head includes a first optical source for emitting first light having a relatively short wavelength, a |
| 6985293 |
Optical pickup using an optical phase plate and which is compatible with optical media for diffe |
January 10, 2006 |
| An optical pickup apparatus having laser light sources emit a first light beam having a relatively shorter wavelength for a DVD and a second light beam having a longer wavelength for a CD-R, an objective lens having a focal length of an information recording surface in the DVD, an optica |
| 6873592 |
Slim optical pickup apparatus |
March 29, 2005 |
| A slim optical pickup apparatus which records/reads information from a recording medium includes a light source, an objective lens which focuses a beam incident from the light source on the recording medium, an optical device which is provided on an optical path between the light source |
| 6791933 |
Optical pickup using an optical phase plate |
September 14, 2004 |
| An optical pickup apparatus having compatibility with a recodable compact disk (CD-R) and a digital video disk (DVD), which uses a wavelength of one of a first light beam and a second light beam according to the recording medium to be used. In the optical pickup apparatus, laser light so |
| 6765857 |
Optical recording and pickup head for digital versatile disc compatible with read-writable compa |
July 20, 2004 |
| An optical recording and pickup head having a flat plate lens of a staircase type diffraction grating structure is compatible with a DVD and a CD-RW. The optical recording and pickup head includes a first optical source for emitting first light having a relatively short wavelength, a |
| 6728177 |
Method of recording data on optical disc at high multiple speed and apparatus thereof |
April 27, 2004 |
| An optical disc recording method to record data on a disc using multiple speeds by dividing a disc region into an inner circumference region and an outer circumference region depending on radii of the disc, setting a multiple recording speed for each region; setting optical recording pow |
| 6686697 |
Circuit to protect a light element |
February 3, 2004 |
| A circuit protects a light element and prevents a breakdown of a laser diode (LD) when electric static discharge (ESD) occurs. The circuit protects the light element in a drive to control an operation of the light element, which radiates light onto a disc. Here, the drive includes a |
| 6636464 |
Optical pickup device capable of detecting stable error signal |
October 21, 2003 |
| An optical pickup device employing a signal detection unit including a hologram element having a plurality of pattern regions for diffracting and/or focusing light reflected and incident from a recording medium, a photodetector having a plurality of light receiving regions for receiving |
| 6587481 |
Light emitting module and compatible optical pickup device adopting the same |
July 1, 2003 |
| A light emitting module packaging two light sources emitting two light beams of different wavelengths, and a compatible optical pickup device adopting the module are provided. The light emitting module includes a base, first and second light sources installed on the base, for emitting |
| 6567366 |
Optical pickup using laser light of different wavelengths to record and reproduce information to |
May 20, 2003 |
| An optical pickup records information on a recordable and reproducible disk and reads information therefrom. The optical pickup includes a laser light source for emitting first laser light in case of a reproduction mode for reproducing information from the disk and emitting second laser |
| 6480222 |
Semiconductor laser and flying optical pickup for recording/reproducing using the same |
November 12, 2002 |
| A semiconductor laser for generating a laser beam and an optical pickup for recording/reproducing information using the semiconductor laser as an optical source are provided. The semiconductor laser includes an aperture member on an emitting end thereof to perform high-density memory |
| 6449241 |
Optical disk |
September 10, 2002 |
| An optical disk having an improved structure is provided so that about 15 gigabytes or more can be recorded on each information recording surface. The optical disk includes at least one information substrate having an incident surface where light for recording/reproducing signals is inpu |
| 6449237 |
Optical recording and pickup head for digital versatile disc compatible with read-writable compa |
September 10, 2002 |
| An optical recording and pickup head having a flat plate lens of a staircase type diffraction grating structure is compatible with a DVD and a CD-RW. The optical recording and pickup head includes a first optical source for emitting first light having a relatively short wavelength, a |
| 6449229 |
Optical pickup assembly with adjustable inclination |
September 10, 2002 |
| An optical pickup assembly includes a base, a bobbin having an objective lens mounted thereon, the bobbin being installed at the base so as to be movable and having a pair of first side surfaces parallel to a radial direction of a disk and a pair of second side surfaces parallel to the |
| 6400658 |
DVD-RAM disk reproduction apparatus for reducing errors during detection of identification data |
June 4, 2002 |
| A DVD-RAM disk reproduction apparatus for reducing an error during detection of ID data, which includes a first operational amplifier for obtaining a sum signal resulting from the addition of four picked-up signals picked up by divided-by-four photodiodes from a DVD-RAM disk having a |
| 6381207 |
Optical pickup movable to control beam shift and field angle in an optical disk drive |
April 30, 2002 |
| An optical pickup of an optical disk drive. The optical pickup includes a laser beam source for generating a laser beam; a pickup base having an objective lens for projecting the laser beam generated from the laser beam source to an information recording surface of an optical disk; a var |
| 6295255 |
Optical pickup having a tilt mechanism to adjust an optical axis of an incident light beam |
September 25, 2001 |
| An optical pickup includes a rotary block rotatably installed on a fixed base; a holder integrally coupled to the rotary block; a bobbin supported by a wires of the holder to be movable; a base plate fixed to the fixed base and placed between the rotary block and the bobbin; an objective |
| 6285646 |
Optical pickup using objective lens compatible with a plurality of optical disks |
September 4, 2001 |
| An optical pickup device including an objective lens which is compatible with a plurality of optical disks of respectively different specifications, such as a digital versatile disk (DVD), a compact disk-recordable (CD-R) medium, a compact disk (CD) and a laser disk (LD). The optical |
| 6282161 |
Optical recording and reproducing apparatus, tilt adjusting method appropriate therefor, and rec |
August 28, 2001 |
| An optical recording and reproducing apparatus for adjusting a tilt of an optical pickup in accordance with an amount of jitter of a reproduction signal, a tilt adjusting method therefor, and a recording control method. The optical recording and reproducing apparatus includes an optical |
| 6275461 |
Optical pickup using an optical phase plate |
August 14, 2001 |
| A recording/reproducing apparatus includes an optical pickup device having an optical phase plate which is compatible with optical recording mediums having different thicknesses, and an optical signal processing device processes information read from the optical recording mediums and |
| 6272096 |
Optical pickup using an optical phase plate |
August 7, 2001 |
| An optical pickup apparatus having compatibility with a recodable compact disk (CD-R) and a digital video disk (DVD), which uses a wavelength of one of a first light beam and a second light beam according to the recording medium to be used. In the optical pickup apparatus, laser light so |
| 6266315 |
Catadioptric optical system, optical pickup and optical disk drive employing the same, and optic |
July 24, 2001 |
| An optical focusing system which uses a light beam emitted from a light source, includes a refractive surface on one side of the optical focusing system and having a first radius of curvature, a first reflection surface on the above one side, surrounding the refractive surface and having |
| 6243216 |
Fast responding optical modulator |
June 5, 2001 |
| A fast responding optical modulating device for a high-density recording using in an optical pickup includes a light source, an optical modulator and a pair of lenses. The pair of lenses are so arranged that the distance between the lenses is shorter than the sum of each focal length of |
| 6222812 |
Optical pickup using an optical phase plate |
April 24, 2001 |
| An optical pickup apparatus having compatibility with a recodable compact disk (CD-R) and a digital video disk (DVD), which uses a wavelength of one of a first light beam and a second light beam according to the recording medium to be used. In the optical pickup apparatus, laser light so |
| 6222801 |
Optical pickup using optically variable iris |
April 24, 2001 |
| An optical pickup includes a variable iris having a numerical aperture is adjusted according to wavelength of light and can be compatibly used for discs having respectively different specifications. The optical pickup includes a plurality of laser sources respectively emitting light of |
| 6167004 |
Error signal detecting apparatus of optical pickup adopting hologram grating |
December 26, 2000 |
| An error signal detecting apparatus for an optical pickup employing a hologram grating, including a sensing lens for focusing light reflected from a recording medium, a hologram grating having first through fourth pattern regions arranged clockwise in a 2.times.2 matrix arrangement, for |
| 6088170 |
Optical system for shaping light beams and an optical pickup employing the same |
July 11, 2000 |
| A beam-shaping optical system includes a light source, a plurality of plates, and a cylindrical lens disposed between the light source and the plurality of plates, wherein the plurality of plates and the cylindrical lens have an optical feature in which the light output from the light |
| 6081497 |
Optical pickup having compatibility with a digital versatile disk and a compact disk-recordable |
June 27, 2000 |
| An optical pickup is used for two kinds of disks, each of which uses a different wavelength of light. The optical pickup includes first and second light sources for individually emitting first and second light beams which have a respectively different wavelength from each other and a |
| 5987924 |
Lens mold and method of manufacturing a lens |
November 23, 1999 |
| A lens device which can be used as an objective lens in an optical pickup apparatus includes an objective lens provided along a light path facing a disc and having a predetermined effective diameter, and light controlling means provided along the light path for controlling the light in a |
| 5872760 |
Optical pickup for correcting an astigmatic difference of light |
February 16, 1999 |
| An optical pickup for correcting an astigmatic difference of a light by using a collimating lens arranged at an angle with respect to the thickness direction of an active layer of a light source and parallel to the width direction of the active layer, for collimating the light emitted |
