Patents by Inventor Hyun Seob Choi
Hyun Seob Choi 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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Publication number: 20240097251Abstract: An embodiment of the present invention relates to a cylindrical secondary battery in which a positive electrode terminal is adhered and fixed to a cylindrical can by an insulating sheet, and thus sealing between the cylindrical can and the positive electrode terminal can be facilitated due to an increased contact area.Type: ApplicationFiled: March 29, 2022Publication date: March 21, 2024Inventors: Hyun Ki JUNG, Byung Chul PARK, Gun Gue PARK, Gwan Hyeon YU, Jin Young MOON, Kyung Rok LEE, Myung Seob KIM, Sung Gwi KO, Woo Hyuk CHOI
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Patent number: 7251209Abstract: 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 at an effective light receiving region of a front photodetector without interference due to internal reflection occurring in the plate beam splitter. In the alternative, a wedge beam splitter in the optical pickup includes first and second mirror planes at a predetermined angle to transmit and reflect incident light at a predetermined ratio. In the optical pickup, an amount of light that is exactly proportional to an output power of the light source can be detected, where the output power of the light source can be accurately controlled, thereby improving a linearity of the output power of the light source.Type: GrantFiled: April 29, 2003Date of Patent: July 31, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Yong-jun Cho, Pyong-yong Seong, Seung-man Han, Hyun-seob Choi, Eun-goo Kim, Jong-koog Lee, Kun-soo Kim, Chun-gi Kim
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Patent number: 7116627Abstract: A compatible optical pickup device includes a single light source to emit a light having a wavelength longer than 650 nm, an objective lens having a near axis area, a ring type annular lens area, and a far axis area to focus the light to form light spots suitable for a first relatively thin optical disk and a second relatively thick optical disk to form a first light spot having an FWHM (full width at half maximum) of 0.72 ?m or less for the first optical disk and a second light spot having an FWHM of 0.8 ?m or more for the second optical disk, an optical path changer to change a proceeding path of incident light, and a photodetector to receive light reflected by the optical disk and having passed through the objective lens and the optical path changer and to detect an information signal and/or an error signal.Type: GrantFiled: July 6, 2001Date of Patent: October 3, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Jang-hoon Yoo, Seung-tae Jung, Ho-cheol Lee, Ju-hyung Lee, Chul-woo Lee, Young-il Kim, Hyun-seob Choi, Sang-beom Hong
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Patent number: 7072114Abstract: 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 optical path control unit controls the light beams so that the light beam emitted from one of the laser light sources is directed to the objective lens and the light output from the objective lens is directed to the optical detection unit, and a phase shift unit between the optical path control unit and the objective lens and which shifts a phase of the second light to reduce the size of a beam spot which is formed the information recording surface in the CD-R.Type: GrantFiled: October 27, 2005Date of Patent: July 4, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Jang Hoon Yoo, Chul Woo Lee, Chong Sam Chung, Pyong Yong Seong, Kun Ho Cho, Hyun Seob Choi, Yong Hoon Lee, Tae Kyung Kim, No Kyong Park
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Patent number: 6985293Abstract: 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 optical path control unit controls the light beams so that the light beam emitted from one of the laser light sources is directed to the objective lens and the light output from the objective lens is directed to the optical detection unit, and a phase shift unit between the optical path control unit and the objective lens and which shifts a phase of the second light to reduce the size of a beam spot which is formed the information recording surface in the CD-R.Type: GrantFiled: June 11, 2003Date of Patent: January 10, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Jang Hoon Yoo, Chul Woo Lee, Chong Sam Chung, Pyong Yong Seong, Kun Ho Cho, Hyun Seob Choi, Yong Hoon Lee, Tae Kyung Kim, No Kyong Park
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Patent number: 6791933Abstract: 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 sources emit a first light beam having a relatively shorter wavelength for the. DVD and a second light beam having a longer wavelength for the CD-R, respectively. An objective lens has a predetermined focal length in accordance with the position of an information recording surface in the DVD. An optical path control unit controls the path of light beams so that the light beam emitted from one of the laser light sources is directed to the objective lens and the light output from the objective lens is directed to the optical detection unit.Type: GrantFiled: March 1, 2000Date of Patent: September 14, 2004Assignee: Samsung Electronics Co., Ltd.Inventors: Jang Hoon Yoo, Chul Woo Lee, Chong Sam Chung, Pyong Yong Seong, Kun Ho Cho, Hyun Seob Choi, Yong Hoon Lee, Tae Kyung Kim, No Kyong Park
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Publication number: 20040090900Abstract: A compatible optical pickup device includes a single light source to emit a light having a wavelength longer than 650 nm, an objective lens having a near axis area, a ring type annular lens area, and a far axis area to focus the light to form light spots suitable for a first relatively thin optical disk and a second relatively thick optical disk to form a first light spot having an FWHM (full width at half maximum) of 0.72 &mgr;m or less for the first optical disk and a second light spot having an FWHM of 0.8 &mgr;m or more for the second optical disk, an optical path changer to change a proceeding path of incident light, and a photodetector to receive light reflected by the optical disk and having passed through the objective lens and the optical path changer and to detect an information signal and/or an error signal.Type: ApplicationFiled: July 6, 2001Publication date: May 13, 2004Inventors: Jang-hoon Yoo, Seung-tae Jung, Ho-cheol Lee, Ju-hyung Lee, Chul-woo Lee, Young-il Kim, Hyun-seob Choi, Sang-beom Hong
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Publication number: 20030210638Abstract: 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 sources emit a first light beam having a relatively shorter wavelength for the DVD and a second light beam having a longer wavelength for the CD-R, respectively. An objective lens has a predetermined focal length in accordance with the position of an information recording surface in the DVD. An optical path control unit controls the path of light beams so that the light beam emitted from one of the laser light sources is directed to the objective lens and the light output from the objective lens is directed to the optical detection unit.Type: ApplicationFiled: June 11, 2003Publication date: November 13, 2003Applicant: Samsung Electronics Co., LtdInventors: Jang Hoon Yoo, Chul Woo Lee, Chong Sam Chung, Pyong Yong Seong, Kun Ho Cho, Hyun Seob Choi, Yong Hoon Lee, Tae Kyung Kim, No Kyong Park
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Publication number: 20030202453Abstract: 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 at an effective light receiving region of a front photodetector without interference due to internal reflection occurring in the plate beam splitter. In the alternative, a wedge beam splitter in the optical pickup includes first and second mirror planes at a predetermined angle to transmit and reflect incident light at a predetermined ratio. In the optical pickup, an amount of light that is exactly proportional to an output power of the light source can be detected, where the output power of the light source can be accurately controlled, thereby improving a linearity of the output power of the light source.Type: ApplicationFiled: April 29, 2003Publication date: October 30, 2003Applicant: Samsung Electronics Co., Ltd.Inventors: Yong-jun Cho, Pyong-yong Seong, Seung-man Han, Hyun-seob Choi, Eun-goo Kim, Jong-koog Lee, Kun-soo Kim, Chun-gi Kim
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Publication number: 20020136132Abstract: A method of controlling a balance of a photodetector capable of increasing light reception efficiency thereof in a compatible optical pickup and an apparatus thereof. The method includes installing first and second light sources in a single module; directing light supplied from the first or second light source and transmitted through a holographic optical element, an optical path changing unit, and an objective lens onto a disk corresponding to each light source, transmitting the light reflected from the disk through the objective lens, and the optical path changing unit to a photodetector, moving the photodetector so that the center of a first one of first and second spots received by the photodetector is concentric with the center of the photodetector; and moving the holographic optical element so that the center of the second received spot from the second light source is concentric with the center of the photodetector.Type: ApplicationFiled: December 6, 2001Publication date: September 26, 2002Inventors: Jong-ryull Kim, Pyong-Yong Seong, Hyun-seob Choi, Young-kug Yoon, Jong-koog Lee
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Publication number: 20020105891Abstract: An optical pickup apparatus including first and second light sources emitting first and second light beams, respectively, each light beam including different wavelengths; first and second optical path converters changing optical paths of the first and second light beams, respectively; an objective lens, arranged next to the first and second optical path converters, focusing a divergent light beam from one of the first and second optical path converters on one of a relatively thin disc and a relatively thick disc; and a photodetector receiving the divergent light beam from the first and second optical path converters after being reflected by the optical recording medium, wherein the optical pickup is exclusive of a collimating lens.Type: ApplicationFiled: September 27, 2001Publication date: August 8, 2002Inventors: Ju-hyung Lee, Hyun-seob Choi
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Patent number: 6275461Abstract: 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 processes information to be recorded thereon using the optical pickup device.Type: GrantFiled: March 31, 2000Date of Patent: August 14, 2001Assignee: Samsung Electronic Co., Ltd.Inventors: Jang Hoon Yoo, Chul Woo Lee, Chong Sam Chung, Pyong Yong Seong, Kun Ho Cho, Hyun Seob Choi, Yong Hoon Lee, Tae Kyung Kim, No Kyong Park
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Patent number: 6272096Abstract: 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 sources emit a first light beam having a relatively shorter wavelength for the DVD and a second light beam having a longer wavelength for the CD-R, respectively. An objective lens has a predetermined focal length in accordance with the position of an information recording surface in the DVD. An optical path control unit controls the path of light beams so that the light beam emitted from one of the laser light sources is directed to the objective lens and the light output from the objective lens is directed to the optical detection unit.Type: GrantFiled: November 30, 2000Date of Patent: August 7, 2001Assignee: Samsung Electronics Co., Ltd.Inventors: Jang Hoon Yoo, Chul Woo Lee, Chong Sam Chung, Pyong Yong Seong, Kun Ho Cho, Hyun Seob Choi, Yong Hoon Lee, Tae Kyung Kim, No Kyong Park
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Patent number: 6222812Abstract: 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 sources emit a first light beam having a relatively shorter wavelength for the DVD and a second light beam having a longer wavelength for the CD-R, respectively. An objective lens has a predetermined focal length in accordance with the position of an information recording surface in the DVD. An optical path control unit controls the path of light beams so that the light beam emitted from one of the laser light sources is directed to the objective lens and the light output from the objective lens is directed to the optical detection unit.Type: GrantFiled: August 29, 1997Date of Patent: April 24, 2001Assignee: Samsung Electronics Co., Ltd.Inventors: Jang Hoon Yoo, Chul Woo Lee, Chong Sam Chung, Pyong Yong Seong, Kun Ho Cho, Hyun Seob Choi, Yong Hoon Lee, Tae Kyung Kim, No Kyong Park
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Publication number: 20010000310Abstract: 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 sources emit a first light beam having a relatively shorter wavelength for the DVD and a second light beam having a longer wavelength for the CD-R, respectively. An objective lens has a predetermined focal length in accordance with the position of an information recording surface in the DVD. An optical path control unit controls the path of light beams so that the light beam emitted from one of the laser light sources is directed to the objective lens and the light output from the objective lens is directed to the optical detection unit.Type: ApplicationFiled: November 30, 2000Publication date: April 19, 2001Inventors: Jang Hoon Yoo, Chul Woo Lee, Chong Sam Chung, Pyong Yong Seong, Kun Ho Cho, Hyun Seob Choi, Yong Hoon Lee, Tae Kyung Kim, No Kyong Park
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Patent number: 5933401Abstract: An optical pickup capable of compatibly adopting disks of different formats which are placed in an optical player includes a first optical source for emitting light having a predetermined wavelength, a second optical source for emitting light having a wavelength different from that of light emitted from the first optical source, an objective lens for focusing light emitted from the respective first and second optical sources on a recording medium placed in the optical player, a light path changing unit disposed on a light path between the first and second optical sources and the objective lens for changing the traveling path of incident light, a first optical detector for receiving light emitted from the first optical source and is incident via the recording medium and the light path changing unit, and a second optical detector for receiving light emitted from the second optical source and is incident via the recording medium and the light path changing unit.Type: GrantFiled: June 5, 1997Date of Patent: August 3, 1999Assignee: Samsung Electronics Co., Ltd.Inventors: Chul-woo Lee, Dong-ho Shin, Chong-sam Chung, Pyeong-yong Seong, Kun-ho Cho, Hyun-seob Choi, Yong-hoon Lee, Tae-kyoung Kim, No-kyong Park