Patents by Inventor Shin Ukegawa
Shin Ukegawa 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: 9041277Abstract: A lighting device includes an LED light source that emits light having a first peak wavelength at 430 to 460 nm and a second peak wavelength at 530 to 570 nm.Type: GrantFiled: April 23, 2013Date of Patent: May 26, 2015Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Naohiro Toda, Shin Ukegawa, Makoto Yamada, Takashi Saito, Shinichi Aoki, Hiroki Noguchi, Masaki Ishiwata, Sayaka Nishi, Ayako Tsukitani
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Patent number: 8878441Abstract: A display device 1 includes light emitting sections 36, 37 of different luminous colors disposed between anode and cathode electrodes, current control units 34, 35 for controlling currents supplied to the light emitting sections 36, 37 to desired current levels, respectively, and an emergency power supply for supplying a current to the current control units 34, 35 in an emergency in which a commercial power source does not perform a desired function. When operated by the emergency power supply, the current control units turn on and off the light emitting sections 36, 37 of different luminous colors such that they are turned on during different periods of time. When the emergency power supply is used, the display device 1 controls turning on of the planar light emitting element using an organic EL light emitting element depending on luminous colors thereof, thereby suppressing the power consumption of the emergency power supply.Type: GrantFiled: February 22, 2011Date of Patent: November 4, 2014Assignee: Panasonic CorporationInventors: Hideharu Kawachi, Shin Ukegawa, Yoshinori Tsuzuki, Tadasi Nisimura, Hiroyuki Hirose, Masanao Okawa
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Publication number: 20130300280Abstract: A lighting device includes an LED light source that emits light having a first peak wavelength at 430 to 460 nm and a second peak wavelength at 530 to 570 nm.Type: ApplicationFiled: April 23, 2013Publication date: November 14, 2013Applicant: PANASONIC CORPORATIONInventors: Naohiro TODA, Shin UKEGAWA, Makoto YAMADA, Takashi SAITO, Shinichi AOKI, Hiroki NOGUCHI, Masaki ISHIWATA, Sayaka NISHI, Ayako TSUKITANI
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Patent number: 8513898Abstract: A light emitting device includes: a plurality of light emitting elements configured to emit light when a direct current is supplied thereto; and a direct current power supply circuit configured to supply an electric current of a given level or more to the light emitting elements. The light emitting device further includes: a light emitting element voltage detection circuit configured to detect a voltage applied to the light emitting elements; and a forward/reverse inverting circuit configured, when the light emitting element voltage detection circuit detects an abnormality in a light emitting element, to apply a reverse voltage to the light emitting element in which the abnormality is detected.Type: GrantFiled: March 26, 2009Date of Patent: August 20, 2013Assignee: Panasonic CorporationInventors: Masanao Okawa, Hirofumi Takaki, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi
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Patent number: 8502471Abstract: A planar light-emitting module lighting circuit uses a lamp comprising an organic electroluminescence layer and electrodes sandwiching the organic electroluminescence layer as a load, and applies a current to the load so as to cause the organic electroluminescence layer to emit light. In the planer light-emitting module lighting circuit, a current at a lighting start time of the lamp is made small as compared with a current at a stationary lighting time at which a predetermined time period has passed since a lighting start.Type: GrantFiled: December 18, 2008Date of Patent: August 6, 2013Assignee: Panasonic CorporationInventors: Masanao Ookawa, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi, Hirofumi Takaki
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Patent number: 8432105Abstract: A light control apparatus and a lighting appliance using the same enable increased luminous efficiency in light control and elongated operative life of a light source. The lighting appliance includes a light source and a light control apparatus. The light control apparatus comprises an electric current output circuit that outputs a constant electric current for lighting to a light source configured of an organic electroluminescence device, and a light control circuit that performs light control of the light source by intermittently supplying the constant electric current outputted from the electric current output circuit. The light control apparatus also comprises an electric discharge prevention circuit (diode) that prevents electric discharge of an electric charge charged in a capacitive component of the organic electroluminescence device.Type: GrantFiled: September 24, 2008Date of Patent: April 30, 2013Assignee: Panasonic CorporationInventors: Hirofumi Takaki, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi, Masanao Okawa
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Patent number: 8344651Abstract: It is an object to provide a light control apparatus and a lighting appliance using the same which enables to increase luminous efficiency in the light control. The lighting appliance includes a light source and a light control apparatus. The light control apparatus includes an electric current output circuit which outputs a constant electric current for lighting to a light source configured of an organic electroluminescence device, an electric current control circuit which controls an intensity of a driving electric current outputted from the electric current output circuit, and the electric current control circuit biases a direct current component so as to vary the driving electric current periodically between a predetermined maximum value and a predetermined minimum value and flows in the same direction at all times in the light control of the light source.Type: GrantFiled: September 24, 2008Date of Patent: January 1, 2013Assignee: Panasonic CorporationInventors: Hirofumi Takaki, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi, Masanao Okawa
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Patent number: 8138679Abstract: Provision of a light emitting device having functionality for restoring to normal even if a low-voltage error occurs, by temporarily applying a reverse current to a low-voltage error light emitting element using a direction inverting circuit, and repairing portions in which impedance has fallen by applying the current.Type: GrantFiled: March 26, 2009Date of Patent: March 20, 2012Assignee: Panasonic Electric Works Co., Ltd.Inventors: Hirofumi Konishi, Shin Ukegawa, Minoru Maehara, Masanao Okawa, Hirofumi Takaki
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Patent number: 8089215Abstract: A discharge lamp lighting device includes: a DC power source; an inverter for inverting the DC power at a predetermined inversion time interval to supply a square wave AC power to a discharge lamp; and a controller for controlling the output power. The controller performs a synchronous operation and controls the DC power source such that DC power outputted during a period other than the output temporarily increasing period in a power increasing period is greater than the DC output power outputted during the period other than the output temporarily increasing period in a rated power period. Further, the controller controls the DC power source such that at least one of an increment of the output power for the output temporarily increasing period and a length of the output temporarily increasing period is less in at least a part of the output increasing period than in the rated power period.Type: GrantFiled: August 24, 2009Date of Patent: January 3, 2012Assignee: Panasonic Electric Works Co., Ltd.Inventors: Toshifumi Tanaka, Hirofumi Konishi, Shin Ukegawa, Shinichi Anami, Masahiro Seki
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Publication number: 20110204789Abstract: A display device 1 includes light emitting sections 36, 37 of different luminous colors disposed between anode and cathode electrodes, current control units 34, 35 for controlling currents supplied to the light emitting sections 36, 37 to desired current levels, respectively, and an emergency power supply for supplying a current to the current control units 34, 35 in an emergency in which a commercial power source does not perform a desired function. When operated by the emergency power supply, the current control units turn on and off the light emitting sections 36, 37 of different luminous colors such that they are turned on during different periods of time. When the emergency power supply is used, the display device 1 controls turning on of the planar light emitting element using an organic EL light emitting element depending on luminous colors thereof, thereby suppressing the power consumption of the emergency power supply.Type: ApplicationFiled: February 22, 2011Publication date: August 25, 2011Applicant: Panasonic Electric Works Co., LTDInventors: Hideharu KAWACHI, Shin Ukegawa, Yoshinori Tsuzuki, Tadasi Nisimura, Hiroyuki Hirose, Masanao Okawa
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Publication number: 20110169422Abstract: A planar light-emitting module lighting circuit uses a lamp comprising an organic electroluminescence layer and electrodes sandwiching the organic electroluminescence layer as a load, and applies a current to the load so as to cause the organic electroluminescence layer to emit light. In the planer light-emitting module lighting circuit, a current at a lighting start time of the lamp is made small as compared with a current at a stationary lighting time at which a predetermined time period has passed since a lighting start.Type: ApplicationFiled: December 18, 2008Publication date: July 14, 2011Inventors: Masanao Ookawa, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi, Hirofumi Takaki
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Publication number: 20110101875Abstract: A light emitting device includes: a plurality of light emitting elements configured to emit light when a direct current is supplied thereto; and a direct current power supply circuit configured to supply an electric current of a given level or more to the light emitting elements. The light emitting device further includes: a light emitting element voltage detection circuit configured to detect a voltage applied to the light emitting elements; and a forward/reverse inverting circuit configured, when the light emitting element voltage detection circuit detects an abnormality in a light emitting element, to apply a reverse voltage to the light emitting element in which the abnormality is detected.Type: ApplicationFiled: March 26, 2009Publication date: May 5, 2011Applicant: PANASONIC ELECTRIC WORKS CO., LTD.Inventors: Masanao Okawa, Hirofumi Takaki, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi
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Publication number: 20100244704Abstract: It is objected to provide a light control apparatus and a lighting appliance using the same which enable to increase luminous efficiency in the light control and to elongate operative life of a light source. The lighting appliance comprises a light source 1 and a light control apparatus 2. The light control apparatus 2 comprises an electric current output circuit 5 which outputs a constant electric current for lighting to a light source configured of an organic electroluminescence device, a light control circuit 6 which performs light control of the light source 1 by intermittently supplying the constant electric current outputted from the electric current output circuit, and an electric discharge prevention circuit (diode) 70 which prevents electric discharge of an electric charge charged in capacitive component of the organic electroluminescence device.Type: ApplicationFiled: September 24, 2008Publication date: September 30, 2010Applicant: PANASONIC ELECTRIC WORKS CO., LTD.Inventors: Hirofumi Takaki, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi, Masanao Okawa
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Publication number: 20100219768Abstract: It is an object to provide a light control apparatus and a lighting appliance using the same which enable to increase luminous efficiency in the light control. The lighting appliance includes a light source and a light control apparatus. The light control apparatus includes an electric current output circuit which outputs a constant electric current for lighting to a light source configured of an organic electroluminescence device, an electric current control circuit which controls an intensity of a driving electric current outputted from the electric current output circuit, and the electric current control circuit biases a direct current component so as to vary the driving electric current periodically between a predetermined maximum value and a predetermined minimum value and flows in the same direction at all times in the light control of the light source.Type: ApplicationFiled: September 24, 2008Publication date: September 2, 2010Applicant: PANASONIC ELECTRIC WORKS CO., LTD.Inventors: Hirofumi Takaki, Shin Ukegawa, Minoru Maehara, Hirofumi Konishi, Masanao Okawa
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Patent number: 7719173Abstract: An electrodeless discharge lamp has a bulb into which a discharge gas and a mercury, which is controlled at a temperature of a coldest spot are filled. A power coupler generates a high frequency electromagnetic field. A ferrule couples the bulb and the power coupler. The bulb is configured as a substantially spherical barrel formed of a transparent material and has an opening. A sealing member is welded to the opening of the barrel having a substantially cylindrical cavity. A protrusion, which becomes the coldest spot when the lamp is lit in a state that the ferrule is disposed upward, is formed at an apex of the bulb. A protruding portion is formed in a vicinity just above the ferrule of the bulb, that is, in a bulb neck portion, so that the bulb neck portion becomes the coldest spot when the lamp is lit in a state that the ferrule is disposed downward. Thereby, a constant optical output is obtained, regardless of a posture of installation of the electrodeless discharge lamp.Type: GrantFiled: March 23, 2006Date of Patent: May 18, 2010Assignee: Panasonic Electric Works Co., Ltd.Inventors: Yoshinori Tsuzuki, Kazuhiko Sakai, Shin Ukegawa, Shigeki Matsuo
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Publication number: 20100052538Abstract: A discharge lamp lighting device includes: a DC power source; an inverter for inverting the DC power at a predetermined inversion time interval to supply a square wave AC power to a discharge lamp; and a controller for controlling the output power. The controller performs a synchronous operation and controls the DC power source such that DC power outputted during a period other than the output temporarily increasing period in a power increasing period is greater than the DC output power outputted during the period other than the output temporarily increasing period in a rated power period. Further, the controller controls the DC power source such that at least one of an increment of the output power for the output temporarily increasing period and a length of the output temporarily increasing period is less in at least a part of the output increasing period than in the rated power period.Type: ApplicationFiled: August 24, 2009Publication date: March 4, 2010Applicant: Panasonic Electric Works Co., Ltd.Inventors: Toshifumi Tanaka, Hirofumi Konishi, Shin Ukegawa, Shinichi Anami, Masahiro Seki
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Publication number: 20100045193Abstract: Provision of a light emitting device having functionality for restoring to normal even if a low-voltage error occurs, by temporarily applying a reverse current to a low-voltage error light emitting element using a direction inverting circuit, and repairing portions in which impedance has fallen by applying the current.Type: ApplicationFiled: March 26, 2009Publication date: February 25, 2010Inventors: Hirofumi Konishi, Shin Ukegawa, Minoru Maehara, Masanao Okawa, Hirofumi Takaki
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Publication number: 20090051291Abstract: In an electrodeless discharge lamp 1 comprising a bulb 10 into which discharge gas and mercury which is controlled at a temperature of a coldest spot are filled, a power coupler 20 generating high frequency electromagnetic field, and a ferrule 15 for coupling the bulb 10 and the power coupler 20, the bulb 10 is configured of a substantially spherical barrel 14 formed of a transparent material and having an opening, and a sealing member 11 welded to the opening of the barrel 14 and having a substantially cylindrical cavity 5; a protrusion 4, which becomes a coldest spot when the lamp is lit in a state that the ferrule 15 is disposed upward, is formed at an apex of the bulb 10; and a protruding portion 17 is formed in a vicinity of just above the ferrule 15 of the bulb 10, that is, in a bulb neck portion 19 so that the bulb neck portion 19 becomes the coldest spot when the lamp is lit in a state that the ferrule 15 is disposed downward.Type: ApplicationFiled: March 23, 2006Publication date: February 26, 2009Applicant: MATSUSHITA ELECTRIC WORKS, LTD.Inventors: Yoshinori Tsuzuki, Kazuhiko Sakai, Shin Ukegawa, Shigeki Matsuo
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Patent number: 6979958Abstract: An arc discharge metal halide lamp for use in selected lighting fixtures having a discharge chamber with light permeable ceramic walls of a selected shape about a discharge region of a selected volume. A pair of electrodes are supported in the discharge region separated from one another by a separation length. The separation length is in a ratio to the effective inner diameter that is greater than four. Ionizable materials are provided in the discharge region comprising a quantity of mercury in a ratio to the discharge region volume that is less than 4 mg/cm3, a noble gas, praseodymium halide, and sodium halide.Type: GrantFiled: January 31, 2002Date of Patent: December 27, 2005Assignees: Matsushita Electric Industrial Co., Ltd., Matsushita Electric Works, Ltd.Inventors: Huiling Zhu, Shin Ukegawa, Hiroshi Nohara, Jakob Maya
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Publication number: 20040108815Abstract: An improved microwave-excited electrodeless discharge bulb and a lamp system using the bulb are designed to produce a nearly white light at an increased luminous efficacy. The bulb encloses a filling containing a mixture of a rare earth halide, a sodium halide, mercury, and a rare gas. The rare earth halide is at least one selected from a group consisting of a cerium halide and praseodymium halide. With the inclusion of cerium halide and/or praseodymium halide in combination with the mercury, the bulb can produce nearly white light at superior luminous efficacy, when energized by the microwave.Type: ApplicationFiled: October 6, 2003Publication date: June 10, 2004Inventors: Shin Ukegawa, Tsutomu Kobayashi, Motohiro Sami