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1.发明授权Lighting device, luminaire using lighting device, and lighting system using luminaire 有权照明装置，使用照明装置的灯具和使用照明装置的照明系统公开(公告)号：US09485822B2
公开(公告)日：2016-11-01
申请号：US14974449
申请日：2015-12-18
Inventor： Shinichi Murakami , Koji Watanabe , Kazuhiro Kumada , Miyo Kangyo
CPC classification number: H05B33/0824 , H05B33/0815 , Y02B20/346
Abstract: A lighting device includes at least first and second lighting circuits configured to receive electric power from a single common DC power supply. First lighting circuit includes a first output capacitor connected between output ends thereof, and a first pre-charge circuit configured to keep a voltage across first output capacitor at a first voltage for first lighting circuit, while a first light source is in OFF state. Second lighting circuit includes a second output capacitor connected between output ends thereof; and a second pre-charge circuit configured to keep a voltage across second output capacitor at a second voltage for second lighting circuit, while a second light source is in OFF state. First and second voltages are set such that a difference between a forward voltage of first light source and the first voltage agrees with a difference between a forward voltage of second light source and the second voltage.
Abstract translation: 照明装置包括至少第一和第二照明电路，其被配置为从单个公共DC电源接收电力。 第一照明电路包括连接在其输出端之间的第一输出电容器和被配置为在第一光源处于截止状态时将第一输出电容器两端的电压保持在第一照明电路的第一电压的第一预充电电路。 第二照明电路包括连接在其输出端之间的第二输出电容器; 以及第二预充电电路，其被配置为在第二光源处于OFF状态时将第二输出电容器两端的电压保持在第二电压的第二电压。 第一和第二电压被设置为使得第一光源的正向电压和第一电压之间的差与第二光源的正向电压和第二电压之间的差一致。
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公开(公告)号：US09992837B1
公开(公告)日：2018-06-05
申请号：US15829888
申请日：2017-12-02
Inventor： Shinichi Murakami , Kazuhiro Kumada , Ryuhei Hayashi
IPC: H05B33/08 , F21V23/00 , F21Y115/10 , F21W131/406 , F21S8/02
CPC classification number: H05B33/0845 , F21S8/00 , F21S8/026 , F21V23/001 , F21W2131/406 , F21Y2115/10 , F21Y2115/20 , H05B33/0812 , H05B33/0815
Abstract: A lighting device includes: a variable voltage source; a transistor which controls a current flowing through a light-emitting element; and a control circuit which causes the transistor to pass a current corresponding to a received instruction for a dimming level through the light-emitting element. When the received instruction instructs at least a predetermined dimming level, the control circuit causes a voltage drop in the transistor to become a first voltage by controlling the variable voltage source, and when the received instruction instructs a dimming level less than the predetermined dimming level, the control circuit causes the voltage drop to become a second voltage higher than the first voltage, by controlling the variable voltage source.
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公开(公告)号：US10076010B2
公开(公告)日：2018-09-11
申请号：US15650880
申请日：2017-07-15
Inventor： Kazuhiro Kumada , Shinichi Murakami
CPC classification number: H05B33/0848 , G05F1/10 , H05B33/0818 , H05B33/0845 , H05B33/0866 , H05B33/0884 , H05B37/02 , Y02B20/347
Abstract: A constant current is configured to control an FET to adjust a drain current so that a detection voltage is equal to a reference voltage. A reference setter is configured to set the reference voltage to a sum of a first voltage and a second voltage. The first voltage is equal to a voltage developing across the detection resistor while a current, which has a same magnitude as a current supplied to the light source so that a current dimming level of the light source is equal to the dimming instruction value, flows through the detection resistor. The second voltage is equal to a voltage developing across the detection resistor while a second current, which has a same magnitude as a current flowing through the limiting resistor while the light source is on, flows through the detection resistor.
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Patent Agency Ranking
公开(公告)号：US09788385B2
公开(公告)日：2017-10-10
申请号：US15192369
申请日：2016-06-24
Inventor： Koji Watanabe , Hiroyuki Matsumoto , Yuichirou Hirowatari , Koji Uenoyama , Shinichi Murakami
IPC: H05B33/08
CPC classification number: H05B33/0857 , H05B33/0803 , H05B33/0845 , H05B33/0866
Abstract: The lighting device includes a control unit configured to set desired values of drive currents of solid state light sources with different light emission colors. The control unit has a normal mode and a correction mode. The normal mode is a mode of setting the desired values to normal desired values corresponding to instruction values representing a desired color of colors. The correction mode is a mode of setting the desired values to corrected desired values corresponding to corrected instruction values obtained by correcting the instruction values.
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公开(公告)号：US10375792B2
公开(公告)日：2019-08-06
申请号：US16141078
申请日：2018-09-25
Inventor： Koji Uenoyama , Yuichirou Hirowatari , Shinichi Murakami
IPC: H05B33/08 , F21S2/00 , H05B37/02 , F21Y115/10
Abstract: A luminaire includes: a light source configured to emit light in a plurality of different colors; a controller that controls the color of the light emitted by the light source; and a plurality of buttons that correspond one-to-one with the plurality of different colors and are operated by a user to cause the light source to emit light. Each time one of the buttons is operated, the controller stores a control parameter associating the color corresponding to the button operated with a sequence value indicating a sequential order in which the button is selected. The controller changes the color of the light emitted by the light source in accordance with the colors and the sequential order indicated in the stored control parameter.
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公开(公告)号：US10149359B2
公开(公告)日：2018-12-04
申请号：US15839940
申请日：2017-12-13
Inventor： Yukio Mori , Shinichi Murakami
Abstract: A dimming control device configured to receive dimming input level data updated at intervals, and to control a dimming level of a light source based on the dimming input level data, includes: a memory that stores the dimming input level data received prior to the newest dimming input level data; and a generator that generates dimming output level data as data having higher resolution than the dimming input level data, the dimming output level data being generated as a function of the dimming input level data received and stored in the memory.
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公开(公告)号：US09756695B2
公开(公告)日：2017-09-05
申请号：US15178825
申请日：2016-06-10
Inventor： Koji Uenoyama , Koji Watanabe , Hiroyuki Matsumoto , Shinichi Murakami , Yuichirou Hirowatari
IPC: H05B33/08 , F21V29/76 , F21V7/00 , F21V14/02 , F21V23/02 , F21Y101/00 , F21Y101/02
CPC classification number: H05B33/086 , F21V7/0083 , F21V14/02 , F21V23/02 , F21V29/763 , F21Y2101/00 , F21Y2113/10 , H05B33/0827
Abstract: The lighting device includes a controller for determining first, second, and third desired values of first, second, third drive currents to first, second, and third light sources, based on a correction coefficient for correcting chromaticity points of the first, second, and third light sources to first, second, and third chromaticity points. The first, second, and third light sources have first, second, and third ranges of individual differences in color. The first chromaticity point is an intersection of a straight line touching the first and second ranges and another straight line touching the first and third ranges. The second chromaticity point is an intersection of a straight line touching the second and first ranges and another straight line touching the second and third ranges. The third chromaticity point is an intersection of a straight line touching the third and first ranges and another straight line touching the third and second ranges.
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公开(公告)号：US09521717B2
公开(公告)日：2016-12-13
申请号：US15044634
申请日：2016-02-16
Inventor： Miyo Kangyo , Koji Watanabe , Kazuhiro Kumada , Shinichi Murakami
CPC classification number: H05B33/0815 , H05B33/0845 , H05B33/0887 , H05B33/089 , H05B37/02 , Y02B20/346
Abstract: When supplying an LED light source with a first output voltage that is equal to or higher than a threshold voltage, an LED driver causes a DC power supply to output a first DC voltage and causes a switching regulator to supply the LED light source with the first output voltage. When supplying the LED light source with a second output voltage that is below the threshold voltage, the LED driver causes the DC power supply to output a second DC voltage lower than the first DC voltage and causes the dropper regulator to supply the LED light source with the second output voltage.
Abstract translation: 当提供等于或高于阈值电压的第一输出电压的LED光源时，LED驱动器使直流电源输出第一直流电压，并使开关调节器向第一 输出电压。 当将LED光源提供低于阈值电压的第二输出电压时，LED驱动器使直流电源输出低于第一直流电压的第二直流电压，并使滴管调节器向LED光源提供 第二个输出电压。
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