Patents by Inventor Jeen Hur
Jeen Hur 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: 20230069985Abstract: Provided are a variable pulse width flat-top laser device and an operation method therefor. A variable pulse width flat-top laser device includes a light source unit including first and second laser light sources driven at different times to respectively emit pulse-type first and second laser beams, a beam shaping unit configured to shape the first and second laser beams emitted from the light source unit into flat-top laser beams, a combination/split unit located between the light source unit and the beam shaping unit, and including a first beam combination/split unit configured to combine optical paths of the first and second laser beams and split a combined optical path into at least two optical paths so that the split at least two optical paths are directed to different regions of an incident surface of the beam shaping unit, and an imaging optical system configured to time-sequentially overlay the flat-top laser beams shaped by the beam shaping unit on a target object to form an image.Type: ApplicationFiled: February 5, 2021Publication date: March 9, 2023Applicant: EO TECHNICS CO., LTD.Inventors: Kyu Dong SUNG, Jeen HUR, Eun Kyong MOON, Hans Juergen KAHLERT
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Patent number: 7613141Abstract: The present invention provides an efficient data transmission method in BLUETOOTH broadcasting. The method of BLUETOOTH broadcasting generates a first broadcast packet and determines whether a slot is included in an access window. In a case where the slot is not included in the access window, a service interface (SI) information value is set to the assignment information of the slot. The first broadcast packet is then transmitted. A second broadcast packet is then generated and it is determined whether a slot is included in the access window. If the slot is not included in the access window, the SI information value is set to zero. The second broadcast packet is then transmitted. A slave receives the broadcast packets and obtains the SI information values. It is then determined whether the slave transmits data at the next odd numbered slot.Type: GrantFiled: December 15, 2003Date of Patent: November 3, 2009Assignee: Electronics and Telecommunications Research InstituteInventors: Jeen Hur, Sangbaek Han, Sun-Hee Kim, Seong-Su Park
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Patent number: 7525999Abstract: Provided is a wireless packet communication method, and more particularly, a method and apparatus for enabling low-power communication by providing separate driving clocks optimized for a lower part for performing the function of a physical layer part and an upper part for performing the function of an upper layer above the physical layer in a wireless packet communication system. The method includes a first clock providing step of measuring actual data transmission and reception rates at a predetermined period, setting up a frequency (F1) of a first clock based on the measured rates, and providing the first clock to the upper part and a second clock providing step of determining a transfer mode of the wireless packet communication system, detecting a frequency (F2) of a second clock selected according to the determined transfer mode, and providing the second clock to the lower part.Type: GrantFiled: December 9, 2005Date of Patent: April 28, 2009Assignee: Electronics and Telecommunications Research InstituteInventors: Jeen Hur, Sun Hee Kim, Byung Jo Kim, Seong Su Park, Sang Baek Han, Hoo Sung Lee
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Patent number: 7508860Abstract: Provided are a pulse signal generator for UWB radio transception and a radio transceiver having the same. The pulse signal generator includes: an envelope generator generating a plurality of envelope signals; a local oscillator array composed of a plurality of high frequency oscillators, each outputting two oscillation signals having a phase difference from each other; a multiplier array receiving the envelope signals and the oscillation signals and outputting signals obtained by respectively multiplying the envelope signals by the oscillation signals; and an I channel adder and a Q channel adder outputting an I channel pulse signal and a Q channel pulse signal by adding output signals having the same phase components among the signals output from the multiplier array, respectively.Type: GrantFiled: December 3, 2004Date of Patent: March 24, 2009Assignee: Electronics and Telecommunications Research InstituteInventors: Seok-Bong Hyun, Geum-Young Tak, Byung Jo Kim, Kyung Hwan Park, Jeen Hur, Seong-Su Park
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Patent number: 7336645Abstract: The present invention relates to a Bluetooth-IP access system, and provides the Bluetooth-IP access system capable of performing broadband, large capacity and fast access by providing a Bluetooth-IP accessing device and a Bluetooth terminal with a module supporting broadband, large capacity, and fast search mounted therein.Type: GrantFiled: October 30, 2003Date of Patent: February 26, 2008Assignee: Electronics and Telecommunications Research InstituteInventors: Jeen Hur, Sang Baek Han, Hoo Sung Lee, Byung Jo Kim, Sung Pack Hong, Seong Su Park
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Publication number: 20060203741Abstract: Provided is a wireless packet communication method, and more particularly, a method and apparatus for enabling low-power communication by providing separate driving clocks optimized for a lower part for performing the function of a physical layer part and an upper part for performing the function of an upper layer above the physical layer in a wireless packet communication system. The method includes a first clock providing step of measuring actual data transmission and reception rates at a predetermined period, setting up a frequency (F1) of a first clock based on the measured rates, and providing the first clock to the upper part and a second clock providing step of determining a transfer mode of the wireless packet communication system, detecting a frequency (F2) of a second clock selected according to the determined transfer mode, and providing the second clock to the lower part.Type: ApplicationFiled: December 9, 2005Publication date: September 14, 2006Inventors: Jeen Hur, Sun Kim, Byung Kim, Seong Park, Sang Han, Hoo Lee
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Patent number: 7020097Abstract: In the adaptive wireless network system having a central optimizer and a method thereof, and in the record medium capable of being read through a computer having a writing of a program to realize the inventive method, in which information for a use wave environment of a corresponding subnet is gained from an access point regardless of a sort of wireless communication instruments so as to apply an optimum transmission/reception type of the corresponding subnet thereto; the system includes an optimizing unit for selecting optimum transmission/reception types of sub networks and transmitting them; an access point determining unit for providing node activity representative data and activity representative data of access point itself, to the optimizing unit, and determining it as the optimum transmission/reception type; and a communication node determining unit for re-determining its own transmission/reception type according to a requirement of the access point determining unit.Type: GrantFiled: December 28, 2001Date of Patent: March 28, 2006Assignee: Electronics and Telecommunications Research InstituteInventors: Jeen Hur, Seong-Su Park, Seok-Bong Hyun, Kyu-Ha Baek, Hee-Tae Lee
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Publication number: 20050141602Abstract: Provided are a pulse signal generator for UWB radio transception and a radio transceiver having the same. The pulse signal generator includes: an envelope generator generating a plurality of envelope signals; a local oscillator array composed of a plurality of high frequency oscillators, each outputting two oscillation signals having a phase difference from each other; a multiplier array receiving the envelope signals and the oscillation signals and outputting signals obtained by respectively multiplying the envelope signals by the oscillation signals; and an I channel adder and a Q channel adder outputting an I channel pulse signal and a Q channel pulse signal by adding output signals having the same phase components among the signals output from the multiplier array, respectively.Type: ApplicationFiled: December 3, 2004Publication date: June 30, 2005Inventors: Seok-Bong Hyun, Geum-Young Tak, Byung Kim, Kyung Park, Jeen Hur, Seong-Su Park
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Publication number: 20040148426Abstract: The present invention provides an efficient data transmission method in Bluetooth broadcasting. The method of Bluetooth broadcasting, includes the steps of: (a) at a master, generating a broadcast packet to include assign information and header information and transmitting the broadcast packet; (b) at the master, generating a broadcast packet by including notification information and transmitting the broadcast packet; and (c) at the slave, receiving the broadcast packet, obtaining the assigning information, header information or notification information included in the broadcast packet and determining whether or not the slave transmits data.Type: ApplicationFiled: December 15, 2003Publication date: July 29, 2004Inventors: Jeen Hur, Sangbaek Han, Sun-Hee Kim, Seong-Su Park
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Publication number: 20040120341Abstract: The present invention provides a method for managing SCO links dynamically in a Bluetooth system, which can reduces energy consumption in a Bluetooth system and provides better quality of data transmission by managing synchronous connection-oriented (SCO) links according to channel environment. The method includes the steps of: (a) analyzing communication channels in order to secure a quality of data transmission in the Bluetooth system; and (b) changing types of SCO links according to the channel analysis.Type: ApplicationFiled: December 10, 2003Publication date: June 24, 2004Inventors: Jeen Hur, Sungback Hong, Byung-Jo Kim, Hoo-Sung Lee, Sun-Hee Kim, Seong-Su Park
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Publication number: 20040109441Abstract: The present invention relates to a Bluetooth-IP access system, and provides the Bluetooth-IP access system capable of performing broadband, large capacity and fast access by providing a Bluetooth-IP accessing device and a Bluetooth terminal with a module supporting broadband, large capacity, and fast search mounted therein.Type: ApplicationFiled: October 30, 2003Publication date: June 10, 2004Inventors: Jeen Hur, Sang Baek Han, Hoo Sung Lee, Byung Jo Kim, Sung Pack Hong, Seong Su Park
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Patent number: 6648712Abstract: A triode-type field emission device includes an insulating substrate; a cathode formed on the insulating substrate; a field emitter aligned on the cathode, wherein the field emitter includes a plurality of emitter tips and each emitter tip has the diameter of nanometers; an insulating layer positioned around the field emitter for electrically isolating the field emitter; and a gate electrode formed on the insulating layer, wherein the gate electrode is closed to an upper portion of the field emitter. Therefore, the triode-type field emission device may be operable in a low voltage.Type: GrantFiled: October 2, 2002Date of Patent: November 18, 2003Assignee: Electronics and Telecommunications Research InstituteInventors: Sung-Yool Choi, Mun-Cheol Paek, Kyoung-Ik Cho, Jeen Hur, Gi-Pyung Han
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Publication number: 20030054723Abstract: A triode-type field emission device includes an insulating substrate; a cathode formed on the insulating substrate; a field emitter aligned on the cathode, wherein the field emitter includes a plurality of emitter tips and each emitter tip has the diameter of nanometers; an insulating layer positioned around the field emitter for electrically isolating the field emitter; and a gate electrode formed on the insulating layer, wherein the gate electrode is closed to an upper portion of the field emitter. Therefore, the triode-type field emission device may be operable in a low voltage.Type: ApplicationFiled: October 2, 2002Publication date: March 20, 2003Inventors: Sung-Yool Choi, Mun-Cheol Paek, Kyoung-Ik Cho, Jeen Hur, Gi-Pyung Han
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Patent number: 6472802Abstract: A triode-type field emission device includes an insulating substrate; a cathode formed on the insulating substrate; a field emitter aligned on the cathode, wherein the field emitter includes a plurality of emitter tips and each emitter tip has the diameter of nanometers; an insulating layer positioned around the field emitter for electrically isolating the field emitter; and a gate electrode formed on the insulating layer, wherein the gate electrode is closed to an upper portion of the field emitter. Therefore, the triode-type field emission device may be operable in a low voltage.Type: GrantFiled: December 23, 1999Date of Patent: October 29, 2002Assignee: Electronics and Telecommunications Research InstituteInventors: Sung-Yool Choi, Mun-Cheol Paek, Kyoung-Ik Cho, Jeen Hur, Gi-Pyung Han
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Publication number: 20020114304Abstract: In the adaptive wireless network system having a central optimizer and a method thereof, and in the record medium capable of being read through a computer having a writing of a program to realize the inventive method, in which information for a use wave environment of a corresponding subnet is gained from an access point regardless of a sort of wireless communication instruments so as to apply an optimum transmission/reception type of the corresponding subnet thereto; the system includes an optimizing unit for selecting optimum transmission/reception types of sub networks and transmitting them; an access point determining unit for providing node activity representative data and activity representative data of access point itself, to the optimizing unit, and determining it as the optimum transmission/reception type; and a communication node determining unit for re-determining its own transmission/reception type according to a requirement of the access point determining unit.Type: ApplicationFiled: December 28, 2001Publication date: August 22, 2002Inventors: Jeen Hur, Seong-Su Park, Seok-Bong Hyun, Kyu-Ha Baek, Hee-Tae Lee