Patents by Inventor Cheol-sung Yeon
Cheol-sung Yeon has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7417934Abstract: An optical pickup used to record information on and/or reproduce information from an optical recording medium, the optical pickup including an optical module to emit a light beam; and a front photo-detector to monitor power of the light beam; wherein the optical module is coupled to the front photo-detector so that a fixed distance is maintained between the optical module and the front photo-detector.Type: GrantFiled: January 20, 2004Date of Patent: August 26, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Young-pyo Lee, Cheol-sung Yeon, Hee-dong Kim, Hong-kyu Lee
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Patent number: 7123437Abstract: A PCMCIA card type recording apparatus includes a housing having a seating section on which a disk cartridge is seated, a disk driving section disposed in the housing to rotatably drive a recording medium in the disk cartridge seated on the seating section, a recording/reproducing unit disposed in the housing to record and reproduce data with respect to the recording medium, and a protection cover disposed at the housing to cover and protect the disk cartridge.Type: GrantFiled: September 26, 2001Date of Patent: October 17, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Byoung-young Bae, Soon-kyo Hong, Chul-woo Lee, Young-min Cheong, Cheol-sung Yeon, Seung-tae Jung
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Patent number: 7088664Abstract: A reflection type compound prism and an optical pickup apparatus employing the same. As a light beam is passed through the compound prism, a size of the light beam in a direction perpendicular to a reference plane is reduced by a first reflection surface, propagated toward an objective lens by second and third reflection surfaces and the size restored by reflecting the light beam from a fourth reflection surface forming an angle less than 45° with respect to the reference plane so that a height of an optical system is reducible to obtain a small thin optical pickup with a desired NA. The second and third reflection surfaces are spaced apart in a direction perpendicular to the reference plane by an amount close to a diameter of the light beam at a point of incidence of the light beam with the compound prism.Type: GrantFiled: February 21, 2002Date of Patent: August 8, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Dae-sik Kim, Seung-tae Jung, Cheol-sung Yeon, Kun-ho Cho
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Patent number: 7079455Abstract: An optical reading and writing system including a base; an optical disk rotatably mounted on the base; an optical pickup including an objective lens, focusing a light beam to form a light spot on a recording surface of the optical disk; an actuator arm mounted on the base such that the actuator arm can pivot in the radial direction of the optical disk by a voice coil motor; a load beam supported by the actuator arm, and capable of moving slightly up and down and in the radial direction of the optical disk by an external force; a flexure attached to the load beam, supporting a slider to enable the slider to contact the recording surface; and a driving unit mounted on free ends of the actuator arm and the load beam, providing a driving force in the radial direction to the free end of the load beam.Type: GrantFiled: February 6, 2001Date of Patent: July 18, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Young-min Cheong, Cheol-sung Yeon, Ho-cheol Lee, Dong-seob Jang, Gyu-chan Jun
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Patent number: 6873592Abstract: 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 and the objective lens, and converts the beam incident from the light source into a parallel beam, an optical axis shifting unit which is provided on an optical path between the optical device and the objective lens, and shifts an optical axis of the parallel beam passing through the optical device in parallel in a direction, a reflecting mirror which is provided on an optical path between the optical axis shifting unit and the objective lens, and reflects the parallel beam passing through the optical axis shifting unit toward the recording medium, and a photodetector which receives a beam reflected from the recording medium and passed through the optical axis shifting unit, and performs a photoelectric conversion.Type: GrantFiled: July 5, 2002Date of Patent: March 29, 2005Assignee: Samsung Electronics Co., Ltd.Inventors: Cheol-sung Yeon, Pyong-yong Seong
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Publication number: 20050046955Abstract: Disclosed is an optical pickup device, which comprises a twin LD (Laser Diode) and an achromatic prism for compensating for optical axes, thereby omitting a separate optical component such as an HOE (Holographic Optical Element) or a wedge beam splitter and having a simple optical pickup structure. The optical pickup device includes a light emitting element for emitting two or more light beams having different wavelengths; an objective lens for converging the light beams emitted from the light emitting element onto an optical disk; a light receiving element for receiving light beams reflected by the optical disk; a beam splitter installed at an optical route between the light emitting element and the objective lens; and an achromatic prism installed at an optical route between the light emitting element and the beam splitter.Type: ApplicationFiled: December 15, 2003Publication date: March 3, 2005Inventors: Hee-Dong Kim, Cheol-Sung Yeon, Ju-Young Gong
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Patent number: 6847606Abstract: An air-bearing slider for an optical disk drive for recording/reproducing information onto/from an optical disk while floating and moving at a predetermined height from the rotatably installed optical disk due to a dynamic air pressure is disclosed. The air-bearing slider includes a slider main body having an objective lens installation hole formed through the slider main body so that an objective lens can be installed, and an opening formed through the slider main body at one side portion of the objective lens installation hole, so that air flow flowing under the slider main body can flow out through the opening via the objective lens installation hole when the slider is floating as a result of dynamic air pressure.Type: GrantFiled: April 17, 2001Date of Patent: January 25, 2005Assignee: Samsung Electronics Co., Ltd.Inventors: Cheol-sung Yeon, Dong-seob Jang, Gyu-chan Jun, Young-min Cheong
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Patent number: 6844969Abstract: A front projection type screen includes a transparent base; a diffusion member formed on one surface of the transparent base; and a retroreflection prism array formed on another surface of the transparent base. Thus, a wide angle of visibility can be secured in a horizontal direction while an angle of visibility in a vertical direction is limited to a narrow scope. Also, a wide viewing angle can be achieved and high efficiency and brightness of light may be obtained.Type: GrantFiled: February 12, 2002Date of Patent: January 18, 2005Assignee: Samsung Electronics Co., Ltd.Inventors: Kun-ho Cho, Seung-tae Jung, Dae-sik Kim, Cheol-sung Yeon
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Publication number: 20050007905Abstract: An optical pickup used to record information on and/or reproduce information from an optical recording medium, the optical pickup including an optical module to emit a light beam; and a front photo-detector to monitor power of the light beam; wherein the optical module is coupled to the front photo-detector so that a fixed distance is maintained between the optical module and the front photo-detector.Type: ApplicationFiled: January 20, 2004Publication date: January 13, 2005Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Young-Pyo Lee, Cheol-sung Yeon, Hee-dong Kim, Hong-kyu Lee
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Patent number: 6633513Abstract: A magneto-optical head for magneto-optical writing and reading systems having an improved construction for a field modulating coil and a miniature objective lens, and a method of manufacturing the magneto-optical head.Type: GrantFiled: June 23, 2000Date of Patent: October 14, 2003Assignee: Samsung Electronics Co., Ltd.Inventors: Woon-bae Kim, Byoung-chan Lee, Hyung-gae Shin, Cheol-sung Yeon, Sang-hun Lee, Jong-woo Shin
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Patent number: 6560186Abstract: A shutter opening apparatus and method for opening a shutter of a cartridge outside an optical disc recording and reproducing apparatus. The shutter opening apparatus includes an opening section mounted on a longitudinal opening of a tray for opening the shutter, a feeding section moved by the opening section for feeding the tray into an inner portion of the optical disc recording and reproducing apparatus, and a driving section for driving the opening section and the feeding section. The opening section includes a worm shaft rotatably mounted across the longitudinal opening, a first bevel gear rotated by the driving section and which is engaged with the worm shaft, and a bracket moved by the worm shaft for opening the shutter. The feeding section is movably installed on the tray and includes a slide bar moved between a first and second positions by the bracket, and a bias spring disposed between the try and the slide bar to bias the slide bar toward the first position.Type: GrantFiled: November 17, 1998Date of Patent: May 6, 2003Assignee: Samsung Electronics Co., Ltd.Inventor: Cheol-sung Yeon
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Publication number: 20030020881Abstract: A projection display system having a projector and a screen. The screen displays an image formed by light projected from the projector and processes user control signals input by a user to transmit the user control signals to the projector. The projector projects light to the screen to form an image thereon according to the user control signals output from the screen.Type: ApplicationFiled: January 7, 2002Publication date: January 30, 2003Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Seung-Tae Jung, Byeong-Cheon Koh, Cheol-Sung Yeon, Kun-Ho Cho, Dae-Sik Kim
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Publication number: 20030012116Abstract: 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 and the objective lens, and converts the beam incident from the light source into a parallel beam, an optical axis shifting unit which is provided on an optical path between the optical device and the objective lens, and shifts an optical axis of the parallel beam passing through the optical device in parallel in a direction, a reflecting mirror which is provided on an optical path between the optical axis shifting unit and the objective lens, and reflects the parallel beam passing through the optical axis shifting unit toward the recording medium, and a photodetector which receives a beam reflected from the recording medium and passed through the optical axis shifting unit, and performs a photoelectric conversion.Type: ApplicationFiled: July 5, 2002Publication date: January 16, 2003Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Cheol-Sung Yeon, Pyong-Yong Seong
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Publication number: 20020172133Abstract: A reflection type compound prism and an optical pickup apparatus employing the same. As a light beam is passed through the compound prism, a size of the light beam in a direction perpendicular to a reference plane is reduced by a first reflection surface, propagated toward an objective lens by second and third reflection surfaces and the size restored by reflecting the light beam from a fourth reflection surface forming an angle less than 45° with respect to the reference plane so that a height of an optical system is reducible to obtain a small thin optical pickup with a desired NA. The second and third reflection surfaces are spaced apart in a direction perpendicular to the reference plane by an amount close to a diameter of the light beam at a point of incidence of the light beam with the compound prism.Type: ApplicationFiled: February 21, 2002Publication date: November 21, 2002Applicant: Samsung Electronics Co., Ltd.Inventors: Dae-sik Kim, Seung-tae Jung, Cheol-sung Yeon, Kun-ho Cho
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Publication number: 20020126378Abstract: A front projection type screen includes a transparent base; a diffusion member formed on one surface of the transparent base; and a retroreflection prism array formed on another surface of the transparent base. Thus, a wide angle of visibility can be secured in a horizontal direction while an angle of visibility in a vertical direction is limited to a narrow scope. Also, a wide viewing angle can be achieved and high efficiency and brightness of light may be obtained.Type: ApplicationFiled: February 12, 2002Publication date: September 12, 2002Inventors: Kun-ho Cho, Seung-tae Jung, Dae-sik Kim, Cheol-sung Yeon
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Publication number: 20020039250Abstract: A PCMCIA card type recording apparatus includes a housing having a seating section on which a disk cartridge is seated, a disk driving section disposed in the housing to rotatably drive a recording medium in the disk cartridge seated on the seating section, a recording/reproducing unit disposed in the housing to record and reproduce data with respect to the recording medium, and a protection cover disposed at the housing to cover and protect the disk cartridge.Type: ApplicationFiled: September 26, 2001Publication date: April 4, 2002Applicant: SAMSUNG ELECTRONICS CO., LTDInventors: Byoung-Young Bae, Soon-Kyo Hong, Chul-Woo Lee, Young-Min Cheong, Cheol-Sung Yeon, Seung-Tae Jung
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Publication number: 20020018441Abstract: An air-bearing slider for an optical disk drive for recording/reproducing information onto/from an optical disk while floating and moving at a predetermined height from the rotatably installed optical disk due to a dynamic air pressure is disclosed. The air-bearing slider includes a slider main body having an objective lens installation hole formed through the slider main body so that an objective lens can be installed, and an opening formed through the slider main body at one side portion of the objective lens installation hole, so that air flow flowing under the slider main body can flow out through the opening via the objective lens installation hole when the slider is floating as a result of dynamic air pressure.Type: ApplicationFiled: April 17, 2001Publication date: February 14, 2002Inventors: Cheol-sung Yeon, Dong-seob Jang, Gyu-chan Jun, Young-min Cheong
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Publication number: 20010055264Abstract: An optical reading and writing system including a base; an optical disk rotatably mounted on the base; an optical pickup including an objective lens, focusing a light beam to form a light spot on a recording surface of the optical disk; an actuator arm mounted on the base such that the actuator arm can pivot in the radial direction of the optical disk by a voice coil motor; a load beam supported by the actuator arm, and capable of moving slightly up and down and in the radial direction of the optical disk by an external force; a flexure attached to the load beam, supporting a slider to enable the slider to contact the recording surface; and a driving unit mounted on free ends of the actuator arm and the load beam, providing a driving force in the radial direction to the free end of the load beam.Type: ApplicationFiled: February 6, 2001Publication date: December 27, 2001Inventors: Young-min Cheong, Cheol-sung Yeon, Ho-cheol Lee, Gyu-chan Jun
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Publication number: 20010012256Abstract: A shutter opening apparatus and method for opening a shutter of a cartridge outside an optical disc recording and reproducing apparatus. The shutter opening apparatus includes an opening section mounted on a longitudinal opening of a tray for opening the shutter, a feeding section moved by the opening section for feeding the tray into an inner portion of the optical disc recording and reproducing apparatus, and a driving section for driving the opening section and the feeding section. The opening section includes a worm shaft rotatably mounted across the longitudinal opening, a first bevel gear rotated by the driving section and which is engaged with the worm shaft, and a bracket moved by the worm shaft for opening the shutter. The feeding section is movably installed on the tray and includes a slide bar moved between a first and second positions by the bracket, and a bias spring disposed between the try and the slide bar to bias the slide bar toward the first position.Type: ApplicationFiled: November 17, 1998Publication date: August 9, 2001Inventor: CHEOL-SUNG YEON
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Patent number: 6266315Abstract: 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 a second radius of curvature being different from the first radius of curvature, a transparent beam focusing surface on the other side of the optical focusing system, and a second reflection surface on the above other side and surrounding the beam focusing surface. The refractive surface refracts an incident light beam, the second reflection surface reflects a light beam refracted by the refractive surface toward the first reflection surface, and the first reflection surface focuses a laser light beam reflected from the second reflection surface on the beam focusing surface as a focused beam spot. The optical focusing system can be used in an optical pickup.Type: GrantFiled: November 20, 1998Date of Patent: July 24, 2001Assignee: Samsung Electronics Co., Ltd.Inventors: Chul-Woo Lee, Chong-Sam Chung, Yong-Moon Lee, Cheol-Sung Yeon, Joong-Eon Seo, Young-Min Cheong, Dong-Ho Shin, Kun-Mo Cho, Pyong-Yong Seong, Jang-Hoon Yoo