Patents by Inventor Byung-Duck Cho
Byung-Duck Cho 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: 7335844Abstract: A keypad assembly for an electronic device is disclosed. The keypad assembly includes a light guide plate through which a light moves, a plurality of first key buttons on the top surface of the light guide plate, a plurality of reflecting patterns on the bottom surface of the light guide plate for reflecting the light moving through the light guide plate toward the first key buttons, protrusions under the reflecting patterns, a plurality of light emitting devices for supplying the light to the light guide plate, and a switch board including a plurality of dome switches and at least one first optical filtering layer whose color is changed into various colors by reacting or not reacting to the wavelengths of lights generated from the light emitting devices is included under each of the first key buttons.Type: GrantFiled: February 2, 2007Date of Patent: February 26, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Joo-Hoon Lee, Byung-Duck Cho, Dong-Hoon Jang, Sun-Tae Jung
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Publication number: 20080039151Abstract: Disclosed is a portable communication terminal having a display unit using a panel-type waveguide. The portable communication terminal includes a body having an optical unit; a panel-type waveguide having a display unit mounted on the body while facing the body, displaying a source image emitted by the optical unit; and an information input/output device positioned in parallel with the panel-type waveguide while being adjacent to the display unit.Type: ApplicationFiled: August 13, 2007Publication date: February 14, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hyun-Soo Kim, Byung-Duck Cho, Kang-Hoon Lee, In-Kwon Kang, Kwang-Cheol Chol, Young-Shik Shin, Jae-Ho Kim
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Publication number: 20080028433Abstract: Disclosed is a system and a method for offering a digital video broadcasting service, and for offering multiple sub-services connected with a main service simultaneously with the main service while offering a DVB-H service.Type: ApplicationFiled: July 26, 2007Publication date: January 31, 2008Applicant: SAMSUNG ELECTRONICS CO., LTDInventors: Byoung-Dai LEE, Byung-Duck Cho, Young-Seop Han, Kang-Hoon Lee, Young-Jip Kim, Jin-Woo Jeon
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Patent number: 7294803Abstract: A keypad includes a light guide panel, the interior of which light propagates through; at least one key button positioned on the upper surface of the light guide panel; and at least one reflective pattern fixedly positioned with respect to the light guide panel to reflect a part of the light, which propagates through the interior of the light guide panel, towards the key button.Type: GrantFiled: December 15, 2005Date of Patent: November 13, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Joo-Hoon Lee, Sun-Tae Jung, Kyoung-Youm Kim, Byung-Duck Cho, Dong-Hoon Jang
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Publication number: 20070240972Abstract: A keypad includes a light guide panel, the interior of which light propagates through; at least one key button positioned on the upper surface of the light guide panel; and at least one reflective pattern fixedly positioned with respect to the light guide panel to reflect a part of the light, which propagates through the interior of the light guide panel, towards the key button.Type: ApplicationFiled: June 18, 2007Publication date: October 18, 2007Inventors: Joo-Hoon Lee, Sun-Tae Jung, Kyoung-Youm Kim, Byung-Duck Cho, Dong-Hoon Jang
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Publication number: 20070240973Abstract: A keypad includes a light guide panel, the interior of which light propagates through; at least one key button positioned on the upper surface of the light guide panel; and at least one reflective pattern fixedly positioned with respect to the light guide panel to reflect a part of the light, which propagates through the interior of the light guide panel, towards the key button.Type: ApplicationFiled: June 18, 2007Publication date: October 18, 2007Inventors: Joo-Hoon Lee, Sun-Tae Jung, Kyoung-Youm Kim, Byung-Duck Cho, Dong-Hoon Jang
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Publication number: 20070205088Abstract: A keypad assembly for an electronic device is disclosed. The keypad assembly includes a light guide plate through which a light moves, a plurality of first key buttons on the top surface of the light guide plate, a plurality of reflecting patterns on the bottom surface of the light guide plate for reflecting the light moving through the light guide plate toward the first key buttons, protrusions under the reflecting patterns, a plurality of light emitting devices for supplying the light to the light guide plate, and a switch board including a plurality of dome switches and at least one first optical filtering layer whose color is changed into various colors by reacting or not reacting to the wavelengths of lights generated from the light emitting devices is included under each of the first key buttons.Type: ApplicationFiled: February 2, 2007Publication date: September 6, 2007Inventors: Joo-Hoon Lee, Byung-Duck Cho, Dong-Hoon Jang, Sun-Tae Jung
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Publication number: 20070175744Abstract: A keypad includes a light guide panel, the interior of which light propagates through, a film positioned on the upper surface of the light guide panel and having at least one key button positioned on the upper surface thereof, and at least one reflective pattern fixedly positioned with respect to the light guide panel to reflect a part of the light, which propagates through the interior of the light guide panel, towards the key button.Type: ApplicationFiled: March 30, 2007Publication date: August 2, 2007Inventors: Joo-Hoon Lee, Sun-Tae Jung, Kyoung-Youm Kim, Byung-Duck Cho, Dong-Hoon Jang
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Publication number: 20070178935Abstract: Disclosed are an apparatus and a method for changing an operation mode of a dual mode terminal by synchronizing a radio frequency identification (RFID) system with a terminal RFID reader and/or a terminal TFID tag. The RFID system includes an RFID tag and/or an RFID reader is installed in a specific area, or in a predetermined area or an entrance/exit of a building provided with a WiFi service. The terminal RFID reader and/or the terminal RFID tag are installed in the dual mode terminal providing a WiFi service and a mobile communication service. Accordingly, the present invention provides advantages of saving power consumption and improving user convenience.Type: ApplicationFiled: January 3, 2007Publication date: August 2, 2007Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Chung Seob Shim, Byung Duck Cho
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Patent number: 7158084Abstract: A variable antenna apparatus for a mobile terminal. The variable antenna apparatus includes a radiation component that is rotatably coupled with the mobile terminal, a feeding component that is adjacent to a first end part of the radiation component and electrically connected to a radio frequency board of the mobile terminal. A grounding component is adjacent to the first end part of the radiation component and selectively connected to a ground of the radio frequency board as the radiation component is rotated. The antenna apparatus is accommodated in a terminal so that it is possible to conveniently carry the terminal, and the antenna is rotatably protruded from the terminal during a telephone call, such that appropriate antenna gain is achieved.Type: GrantFiled: September 22, 2004Date of Patent: January 2, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Dong-Hwan Kim, Byung-Duck Cho, Wan-Jin Choi
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Publication number: 20060260922Abstract: A keypad includes a light guide panel, the interior of which light propagates through; at least one key button positioned on the upper surface of the light guide panel; and at least one reflective pattern fixedly positioned with respect to the light guide panel to reflect a part of the light, which propagates through the interior of the light guide panel, towards the key button.Type: ApplicationFiled: December 15, 2005Publication date: November 23, 2006Inventors: Joo-Hoon Lee, Sun-Tae Jung, Kyoung-Youm Kim, Byung-Duck Cho, Dong-Hoon Jang
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Publication number: 20060260923Abstract: A keypad includes a light guide panel, the interior of which light propagates through, a film positioned on the upper surface of the light guide panel and having at least one key button positioned on the upper surface thereof, and at least one reflective pattern fixedly positioned with respect to the light guide panel to reflect a part of the light, which propagates through the interior of the light guide panel, towards the key button.Type: ApplicationFiled: January 6, 2006Publication date: November 23, 2006Inventors: Joo-Hoon Lee, SunTae Jung, Kyoung-Youm Kim, Byung-Duck Cho, Dong-Hoon Jang
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Publication number: 20060240833Abstract: A mobile station (MS) for performing a handoff using position information including a global positioning system (GPS) module for receiving one or more GPS signals; and a controller for calculating a position of the MS by enabling the GPS module if a handoff condition occurs and transmitting the calculated position information to a base station (BS).Type: ApplicationFiled: February 22, 2006Publication date: October 26, 2006Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Do-Hun Kwon, Ki-Tae Lee, Byung-Duck Cho, Doo-Yoel Kam, Dong-In Oh
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Publication number: 20060094368Abstract: An apparatus and method for supplying information so that power consumption in a digital broadcast receiving terminal can be reduced and a user can use an appropriate antenna depending on a situation. The digital broadcast receiving terminal includes an external antenna detachably assembled with the outside of the terminal a switch unit for selecting any one among the internal antennas and the external antenna, and a signal-receiving condition sensing unit capable of sensing the signal-receiving condition of the internal antennas and the external antenna. If it is impossible to receive the digital broadcast signal by using the internal antennas, the external antenna is used. If the external antenna is mounted, power is supplied only to an RF unit connected to the external antenna and the power supply to the remaining RF unit is cut off, reducing power consumption.Type: ApplicationFiled: October 24, 2005Publication date: May 4, 2006Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Kyung-Ha Lee, Byung-Duck Cho
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Publication number: 20050237242Abstract: A variable antenna apparatus for a mobile terminal. The variable antenna apparatus includes a radiation component that is rotatably coupled with the mobile terminal, a feeding component that is adjacent to a first end part of the radiation component and electrically connected to a radio frequency board of the mobile terminal. A grounding component is adjacent to the first end part of the radiation component and selectively connected to a ground of the radio frequency board as the radiation component is rotated. The antenna apparatus is accommodated in a terminal so that it is possible to conveniently carry the terminal, and the antenna is rotatably protruded from the terminal during a telephone call, such that appropriate antenna gain is achieved.Type: ApplicationFiled: September 22, 2004Publication date: October 27, 2005Applicant: SAMSUNG ELECTRONICS CO., LTD..Inventors: Dong-Hwan Kim, Byung-Duck Cho, Wan-Jin Choi
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Patent number: 6397090Abstract: A power saving device for a radio communication terminal reduces current consumption by changing the number of power amplifying stages. A power amplifier in the radio communication terminal includes a first amplifier for high power and a second amplifier for low power. A signal path selector switches an input signal to an input node of the first or second amplifier in response to a switching control signal. An output path selector selects one of output signals from the first and second amplifiers in response to the switching control signal. An RSSI detector detects signal strength of a signal received from a base station.Type: GrantFiled: December 16, 1998Date of Patent: May 28, 2002Assignee: Samsung Electronics, Co., Ltd.Inventor: Byung-Duck Cho
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Patent number: 6157849Abstract: A method for reducing power consumption in a portable radio communication terminal by selectively preventing back light operation using daylight hours. The portable radio communication terminal checks whether current time of the timer is within a predetermined period of daytime. If the current time is within the period of daytime, the portable radio communication terminal is set to a back light-off mode. In this condition, if key data is received, the portable radio communication terminal manages the key data without turning on the back light. Therefore, it is possible not only to extend an operating time of the battery but also to prevent an increase of the temperature due to the heat radiation of the portable radio communication terminal.Type: GrantFiled: December 23, 1997Date of Patent: December 5, 2000Assignee: Samsung Electronics Co., Ltd.Inventor: Byung-Duck Cho