Patents by Inventor Lacroix Yves
Lacroix Yves 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: 9029801Abstract: A carrier lifetime measurement method includes material excitation, and detection of light emitted from that material. The method is characterized by: exciting the material such that excitation periods are repeated at periodic intervals; optically separating decaying light emitted after the end of the excitation period from light emitted from the material during the excitation period; and accumulating and detecting a plurality of the separated decaying light emissions within a measurement time which spans a plurality of the excitation periods and obtaining a lifetime based on an intensity of the accumulated light.Type: GrantFiled: February 15, 2011Date of Patent: May 12, 2015Assignee: YSystems, Ltd.Inventor: Lacroix Yves
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Patent number: 8673656Abstract: Provided is a method and a device for measuring a temperature which can recognize the temperature of a semiconductor layer directly with high precision when the semiconductor layer is formed by deposition. The quantity of laser light transmitted to a semiconductor layer is monitored by a photodetector by using laser light having a wavelength ?s at which the transmittance of light changes abruptly when the temperature of the semiconductor layer reaches Ts during or after deposition. When heat being given to the semiconductor layer is changed, the quantity of laser light monitored by the photodetector changes abruptly when the temperature of the semiconductor layer reaches Ts at a time A, B or C. Consequently, the fact that the temperature of the semiconductor layer reached Ts at a time A, B or C can be recognized exactly, and an error in temperature information observed by a device for measuring temperature variations can be calibrated, for example.Type: GrantFiled: December 26, 2008Date of Patent: March 18, 2014Assignee: YSystems, Ltd.Inventor: Lacroix Yves
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Patent number: 8643029Abstract: Disclosed is a light emitting device having a plurality of light emitting cells and a package having the same mounted thereon. The light emitting device includes a plurality of light emitting cells which are formed on a substrate and each of which has an N-type semiconductor layer and a P-type semiconductor layer located on a portion of the N-type semiconductor layer. The plurality of light emitting cells are bonded to a submount substrate. Accordingly, heat generated from the light emitting cells can be easily dissipated, so that a thermal load on the light emitting device can be reduced. Meanwhile, since the plurality of light emitting cells are electrically connected using connection electrodes or electrode layers formed on the submount substrate, it is possible to provide light emitting cell arrays connected to each other in series.Type: GrantFiled: March 29, 2011Date of Patent: February 4, 2014Assignee: Seoul Opto Device Co., Ltd.Inventors: Chung Hoon Lee, Lacroix Yves, Hyung Soo Yoon, Young Ju Lee
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Publication number: 20130277682Abstract: The present invention relates to a light emitting device, including a conductive substrate, vertical light emitting cells arranged on the conductive substrate, an insulating layer interposed between the conductive substrate and the vertical light emitting cells, and a wire electrically connecting the vertical light emitting cells.Type: ApplicationFiled: June 20, 2013Publication date: October 24, 2013Inventors: Chung-Hoon LEE, Keon-Young Lee, Lacroix Yves
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Patent number: 8536612Abstract: Disclosed is a light emitting device having a plurality of light emitting cells and a package having the same mounted thereon. The light emitting device includes a plurality of light emitting cells which are formed on a substrate and each of which has an N-type semiconductor layer and a P-type semiconductor layer located on a portion of the N-type semiconductor layer. The plurality of light emitting cells are bonded to a submount substrate. Accordingly, heat generated from the light emitting cells can be easily dissipated, so that a thermal load on the light emitting device can be reduced. Meanwhile, since the plurality of light emitting cells are electrically connected using connection electrodes or electrode layers formed on the submount substrate, it is possible to provide light emitting cell arrays connected to each other in series.Type: GrantFiled: June 3, 2011Date of Patent: September 17, 2013Assignee: Seoul Opto Device Co., Ltd.Inventors: Chung Hoon Lee, Lacroix Yves, Hyung Soo Yoon, Young Ju Lee
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Patent number: 8492775Abstract: The present invention relates to a light emitting device including a light emitting element having a plurality of light emitting cells arranged on a substrate, a first electrode arranged on each light emitting cell of the plurality of light emitting cells, a second electrode arranged between the substrate and each light emitting cell of the plurality of light emitting cells, the second electrode being disposed to face the first electrode. The light emitting device also includes a conductive material electrically connecting the second electrode arranged under a first light emitting cell of the plurality of light emitting cells to the first electrode arranged on an adjacent second light emitting cell of the plurality of light emitting cells, and a control unit configured to control waveforms of a voltage and a current applied to the light emitting element.Type: GrantFiled: May 15, 2012Date of Patent: July 23, 2013Assignee: Seoul Opto Device Co. Ltd.Inventors: Chung-Hoon Lee, Keon-Young Lee, Lacroix Yves
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Publication number: 20130140431Abstract: [Problem] An apparatus and method for measuring luminescence decay due to the lifetime of energy carriers inside a material such as a semiconductor is presented. [Solution] The intensity of a laser is modulated by a light modulating device resulting in a square wave excitation 14, and applied to a semiconducting material. The energy carriers inside the semiconductor are excited, and recombine after a certain time to give rise in part to some light emission 24, which decays in intensity from the time at which the excitation periods end. The decaying light is separated from the light emitted during excitation by another light modulator resulting in 26. This light intensity 26 contains the information related to the carrier lifetime. Because the amount of this light 26 is small and has a very short emission time, a CCD detector is used to be integrated several cycles of the decay periods in order to obtain a reasonable signal. This integrated intensity signal can be used to determine the carrier lifetime.Type: ApplicationFiled: February 15, 2011Publication date: June 6, 2013Applicant: YSystems Ltd.Inventor: Lacroix Yves
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Patent number: 8350276Abstract: The present invention relates to a light emitting device. In the light emitting device of the present invention, light emitting cells of a first light emitting cell block and light emitting cells of a second light emitting cell block corresponding thereto are connected in parallel so that a current can cross the light emitting cells of the first and second light emitting cell blocks. Thus, even though a leakage current occurs in some of light emitting cells, the current is allowed to cross light emitting cells connected in another direction, thereby preventing overload on some of the light emitting cells due to the leakage current and ensuring uniform light emission and prolonged life span in the AC light emitting device.Type: GrantFiled: August 8, 2006Date of Patent: January 8, 2013Assignee: Seoul Opto Device Co., Ltd.Inventors: Jae Ho Lee, Lacroix Yves
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Patent number: 8294386Abstract: The present invention relates to a light emitting device. The light emitting device according to the present invention comprises a light emitting cell block having a plurality of light emitting cells; and a bridge rectifying circuit connected to input and output terminals of the light emitting cell block, wherein the bridge rectifying circuit includes a plurality of diodes between nodes. In manufacturing an AC light emitting device with a bridge rectifying circuit built therein, the present invention can provide a light emitting device capable of enhancing the reliability and luminance of the light emitting device by setting the size of diodes of the bridge rectifying circuit to be a certain size and controlling the number thereof.Type: GrantFiled: September 23, 2011Date of Patent: October 23, 2012Assignee: Seoul Opto Device Co., Ltd.Inventors: Jae Ho Lee, Yeo Jin Yoon, Eu Jin Hwang, Lacroix Yves
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Publication number: 20120235583Abstract: The present invention relates to a light emitting device including a light emitting element having a plurality of light emitting cells arranged on a substrate, a first electrode arranged on each light emitting cell of the plurality of light emitting cells, a second electrode arranged between the substrate and each light emitting cell of the plurality of light emitting cells, the second electrode being disposed to face the first electrode. The light emitting device also includes a conductive material electrically connecting the second electrode arranged under a first light emitting cell of the plurality of light emitting cells to the first electrode arranged on an adjacent second light emitting cell of the plurality of light emitting cells, and a control unit configured to control waveforms of a voltage and a current applied to the light emitting element.Type: ApplicationFiled: May 15, 2012Publication date: September 20, 2012Applicant: SEOUL OPTO DEVICE CO., LTD.Inventors: Chung-Hoon LEE, Keon-Young LEE, Lacroix YVES
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Patent number: 8227272Abstract: Disclosed is a light emitting device having a plurality of light emitting cells and a package having the same mounted thereon. The light emitting device includes a plurality of light emitting cells which are formed on a substrate and each of which has an N-type semiconductor layer and a P-type semiconductor layer located on a portion of the N-type semiconductor layer. The plurality of light emitting cells are bonded to a submount substrate. Accordingly, heat generated from the light emitting cells can be easily dissipated, so that a thermal load on the light emitting device can be reduced. Meanwhile, since the plurality of light emitting cells are electrically connected using connection electrodes or electrode layers formed on the submount substrate, it is possible to provide light emitting cell arrays connected to each other in series.Type: GrantFiled: June 10, 2009Date of Patent: July 24, 2012Assignee: Seoul Opto Device Co., Ltd.Inventors: Chung Hoon Lee, Lacroix Yves, Hyung Soo Yoon, Young Ju Lee
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Patent number: 8198643Abstract: The present invention relates to a light emitting element with arrayed cells, a method of manufacturing the same, and a light emitting device using the same. The present invention provides a light emitting element including a light emitting cell block with a plurality of light emitting cells connected in series or parallel on a single substrate, and a method of manufacturing the same, wherein each of the plurality of light emitting cells includes an N-type semiconductor layer and a P-type semiconductor layer, and the N-type semiconductor layer of one light emitting cell is electrically connected to the P-type semiconductor layer of another adjacent light emitting cell. Further, the present invention provides a light emitting device including a light emitting element with a plurality of light emitting cells connected in series.Type: GrantFiled: May 11, 2011Date of Patent: June 12, 2012Assignee: Seoul Opto Device Co., Ltd.Inventors: Chung-Hoon Lee, Keon-Young Lee, Lacroix Yves
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Patent number: 8183592Abstract: A light emitting device includes a plurality of light emitting cells which are formed on a substrate and each of which has an N-type semiconductor layer and a P-type semiconductor layer located on a portion of the N-type semiconductor layer. The plurality of light emitting cells are bonded to a submount substrate. Heat generated from the light emitting cells can be easily dissipated, so that a thermal load on the light emitting device can be reduced. Since the plurality of light emitting cells are electrically connected using connection electrodes or electrode layers formed on the submount substrate, it is possible to provide light emitting cell arrays connected to each other in series. Further, it is possible to provide a light emitting device capable of being directly driven by an AC power source by connecting the serially connected light emitting cell arrays in reverse parallel to each other.Type: GrantFiled: September 21, 2011Date of Patent: May 22, 2012Assignee: Seoul Opto Device Co., Ltd.Inventors: Chung Hoon Lee, Lacroix Yves, Hyung Soo Yoon, Young Ju Lee
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Patent number: 8168988Abstract: The present invention relates to a light emitting element with arrayed cells, a method of manufacturing the same, and a light emitting device using the same. The present invention provides a light emitting element including a light emitting cell block with a plurality of light emitting cells connected in series or parallel on a single substrate, and a method of manufacturing the same, wherein each of the plurality of light emitting cells includes an N-type semiconductor layer and a P-type semiconductor layer, and the N-type semiconductor layer of one light emitting cell is electrically connected to the P-type semiconductor layer of another adjacent light emitting cell. Further, the present invention provides a light emitting device including a light emitting element with a plurality of light emitting cells connected in series.Type: GrantFiled: October 25, 2010Date of Patent: May 1, 2012Assignee: Seoul Opto Device Co., Ltd.Inventors: Chung-Hoon Lee, Keon-Young Lee, Lacroix Yves
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Publication number: 20120091478Abstract: A light emitting device includes a plurality of light emitting cells which are formed on a substrate and each of which has an N-type semiconductor layer and a P-type semiconductor layer located on a portion of the N-type semiconductor layer. The plurality of light emitting cells are bonded to a submount substrate. Heat generated from the light emitting cells can be easily dissipated, so that a thermal load on the light emitting device can be reduced. Since the plurality of light emitting cells are electrically connected using connection electrodes or electrode layers formed on the submount substrate, it is possible to provide light emitting cell arrays connected to each other in series. Further, it is possible to provide a light emitting device capable of being directly driven by an AC power source by connecting the serially connected light emitting cell arrays in reverse parallel to each other.Type: ApplicationFiled: September 21, 2011Publication date: April 19, 2012Applicant: SEOUL OPTO DEVICE CO., LTD.Inventors: Chung Hoon LEE, Lacroix YVES, Hyung Soo YOON, Young Ju LEE
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Publication number: 20120013260Abstract: The present invention relates to a light emitting device. The light emitting device according to the present invention comprises a light emitting cell block having a plurality of light emitting cells; and a bridge rectifying circuit connected to input and output terminals of the light emitting cell block, wherein the bridge rectifying circuit includes a plurality of diodes between nodes. In manufacturing an AC light emitting device with a bridge rectifying circuit built therein, the present invention can provide a light emitting device capable of enhancing the reliability and luminance of the light emitting device by setting the size of diodes of the bridge rectifying circuit to be a certain size and controlling the number thereof.Type: ApplicationFiled: September 23, 2011Publication date: January 19, 2012Applicant: SEOUL OPTO DEVICE CO., LTD.Inventors: Jae Ho LEE, Yeo Jin YOON, Eu Jin HWANG, Lacroix YVES
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Publication number: 20110312107Abstract: Provided is a method and a device for measuring a temperature which can recognize the temperature of a semiconductor layer directly with high precision when the semiconductor layer is formed by deposition. The quantity of laser light transmitted a semiconductor layer is monitored by a photodetector by using laser light having a wavelength As at which the transmittance of light changes abruptly when the temperature of the semiconductor layer reaches Ts during or after deposition. When heat being given to the semiconductor layer is changed, the quantity of laser light monitored by the photodetector changes abruptly when the temperature of the semiconductor layer reaches Ts at a time A, B or C. Consequently, the fact that the temperature of the semiconductor layer reached Ts at a time A, B or C can be recognized exactly, and an error in temperature information observed by a device for measuring temperature variations can be calibrated, for example.Type: ApplicationFiled: December 26, 2008Publication date: December 22, 2011Applicant: YSystems Ltd.Inventor: Lacroix Yves
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Patent number: 8054002Abstract: The present invention relates to a light emitting device. The light emitting device according to the present invention comprises a light emitting cell block having a plurality of light emitting cells; and a bridge rectifying circuit connected to input and output terminals of the light emitting cell block, wherein the bridge rectifying circuit includes a plurality of diodes between nodes. In manufacturing an AC light emitting device with a bridge rectifying circuit built therein, the present invention can provide a light emitting device capable of enhancing the reliability and luminance of the light emitting device by setting the size of diodes of the bridge rectifying circuit to be a certain size and controlling the number thereof.Type: GrantFiled: December 5, 2006Date of Patent: November 8, 2011Assignee: Seoul Opto Device Co., Ltd.Inventors: Jae Ho Lee, Yeo Jin Yoon, Eu Jin Hwang, Lacroix Yves
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Publication number: 20110233574Abstract: Disclosed is a light emitting device having a plurality of light emitting cells and a package having the same mounted thereon. The light emitting device includes a plurality of light emitting cells which are formed on a substrate and each of which has an N-type semiconductor layer and a P-type semiconductor layer located on a portion of the N-type semiconductor layer. The plurality of light emitting cells are bonded to a submount substrate. Accordingly, heat generated from the light emitting cells can be easily dissipated, so that a thermal load on the light emitting device can be reduced. Meanwhile, since the plurality of light emitting cells are electrically connected using connection electrodes or electrode layers formed on the submount substrate, it is possible to provide light emitting cell arrays connected to each other in series.Type: ApplicationFiled: June 3, 2011Publication date: September 29, 2011Applicant: SEOUL OPTO DEVICE CO., LTD.Inventors: Chung Hoon LEE, Lacroix YVES, Hyung Soo YOON, Young Ju LEE
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Publication number: 20110210350Abstract: The present invention relates to a light emitting element with arrayed cells, a method of manufacturing the same, and a light emitting device using the same. The present invention provides a light emitting element including a light emitting cell block with a plurality of light emitting cells connected in series or parallel on a single substrate, and a method of manufacturing the same, wherein each of the plurality of light emitting cells includes an N-type semiconductor layer and a P-type semiconductor layer, and the N-type semiconductor layer of one light emitting cell is electrically connected to the P-type semiconductor layer of another adjacent light emitting cell. Further, the present invention provides a light emitting device including a light emitting element with a plurality of light emitting cells connected in series.Type: ApplicationFiled: May 11, 2011Publication date: September 1, 2011Applicant: SEOUL OPTO DEVICE CO., LTD.Inventors: Chung-Hoon LEE, Keon-Young LEE, Lacroix YVES