公开(公告)号：EP2240001A3

公开(公告)日：2016-11-16

申请号：EP10159386.1

申请日：2010-04-08

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： Kamoi, Takeshi

IPC分类号： H05B41/04 ,  H05B41/292

CPC分类号： H05B41/2925 ,  H05B41/042 ,  Y02B20/208

摘要： [Object] To prevent generation of an unnecessary starting high voltage to ensure power saving and safety even when a high-pressure discharge lamp is fails to be started at, for example, the end of useful life, and to provide a normal high-pressure discharge lamp with reliable starting and restarting characteristics.
[Means for Settlement] A control circuit 3 for switching a first operation period to operate a starting voltage generating circuit 2 to start discharging a high-pressure discharge lamp DL and a second operation period to maintain a steady arc discharge after the high-pressure discharge lamp DL has started discharging, based on a result of discrimination from lighting discrimination means 31 has: measurement means 32 adapted to measure operation information of the first operation period; means 33 and 34 adapted to control operation during the first operation period based on a result of measurement from the measurement means 32; and reset means 36 adapted to initialize the operation information of the first operation period measured by the measurement means 32 upon continuation of the second operation period for a reference time or longer.

公开(公告)号：EP2938168A4

公开(公告)日：2016-10-12

申请号：EP13864913

申请日：2013-12-18

申请人： USHIO ELECTRIC INC

发明人： KONO YOICHI

IPC分类号： H05B41/26 ,  H01J61/06 ,  H01J61/073 ,  H01J61/86 ,  H05B41/282

CPC分类号： H05B41/2921 ,  H01J61/0732 ,  H01J61/0735 ,  H01J61/16 ,  H01J61/26 ,  H01J61/86 ,  H05B41/04 ,  H05B41/2925 ,  Y02B20/208

公开(公告)号：EP1843646A3

公开(公告)日：2014-06-04

申请号：EP07014898.6

申请日：2001-07-25

申请人： Harison Toshiba Lighting Corporation

发明人： Yuda, Tokuji ,  Katoh, Junichi

IPC分类号： H05B41/292

CPC分类号： H05B41/2887 ,  H05B41/2928 ,  Y02B20/202 ,  Y02B20/208

摘要： Disclosed a high pressure discharge lamp driving apparatus for driving a high pressure discharge lamp during a stable operation thereof with an AC lamp current alternating for opposite half-cycle periods, the apparatus comprising an AC lamp current supply for supplying the AC lamp current to the high pressure discharge lamp, a detector for detecting the output AC lamp current to the high pressure discharge lamp, a controller responsive to the detector for controlling the AC supply to output the AC lamp current with a waveform which is characterized by that (i) a mean value in the second half of each half-cycle period is larger than the means value of the first half of each half-cycle period, (ii) no pulse current is contained in the second half of each half-cycle period, (iii) the AC lamp current has a maximum value immediately after polarity change between the positive and negative half-cycle periods, and (iv) the AC lamp current has also a waveform defined by that the ratio (d/a) of the maximum value (d) of the AC lamp current and a mean value (a) of the AC lamp current in its each half-cycle period satisfies a following equation. 1.05 ≦ d / a ≦ 1.80

公开(公告)号：EP1838139A3

公开(公告)日：2014-04-09

申请号：EP07005507.4

申请日：2007-03-16

申请人： Funai Electric Co., Ltd.

发明人： Morishita, Isaya

IPC分类号： H05B41/292 ,  H05B41/392

CPC分类号： H05B41/2925 ,  H05B41/3928 ,  Y02B20/202 ,  Y02B20/208

摘要： A projector includes a lamp drive circuit which drives a lamp, and a lamp drive current detection unit which detects the lamp drive current. Based upon the lamp drive current which is detected, the lamp drive circuit controls the lamp drive current by PWM control, so as to drive the lamp at constant power. A control unit detects the pulse width of this PWM control signal for the lamp several times, after a constant time period has elapsed from when the power supply is turned ON, and includes a lamp shorted out decision unit which decides that the lamp is shorted out, if all of these pulse widths which have thus been detected are less than or equal to a predetermined width.

公开(公告)号：EP1594156B1

公开(公告)日：2013-06-19

申请号：EP04027338.5

申请日：2004-11-17

申请人： USHIODENKI KABUSHIKI KAISHA

发明人： Suzuki, Yoshikazu ,  Sugaya, Katumi ,  Arimoto, Tomoyoshi

IPC分类号： H01J61/86 ,  H01J61/12 ,  H01J61/073 ,  G05F1/02 ,  H05B41/00 ,  H01J61/54

CPC分类号： H01J61/827 ,  H01J61/073 ,  H01J61/20 ,  H01J61/86 ,  H05B41/2928 ,  Y02B20/208

公开(公告)号：EP2544513A1

公开(公告)日：2013-01-09

申请号：EP10796642.6

申请日：2010-03-19

申请人： Hu, Jun

发明人： Hu, Jun

IPC分类号： H05B41/36

CPC分类号： H05B41/2883 ,  H05B41/2881 ,  H05B41/2928 ,  Y02B20/208

摘要： A method for automatically controlling the output power of a gas discharge lamp includes: detecting the luminous decay variation of the gas discharge lamp, according to the detected luminous decay variation, matching a corresponding actual power value for the gas discharge lamp; and according to the matched actual power value, regulating the output power of the gas discharge lamp. Accordingly, the invention also discloses an electronic ballast, including: a luminous decay sampling module(8), for detecting the luminous decay variation of the gas discharge lamp; a single chip microcomputer (7), for matching a corresponding actual power value for the gas discharge lamp according to the luminous decay variation detected by the luminous decay sampling module; and a half-bridge inverter(6), for regulating the output power of the gas discharge lamp according to the actual power value matched by the single chip microcomputer microcomputer. The electronic ballast can prolong the service life of the gas discharge lamp, and save more energy compared with existing electronic ballasts by the invention.

摘要翻译： 一种用于自动地控制气体放电灯的输出功率的方法包括：检测所述气体放电灯的发光衰变变化，雅丁于检测到的光衰变型中，用于匹配的气体放电灯的相应的实际功率值; 和gemäß匹配于实际电力值，调节所述气体放电灯的输出功率。 因此，本发明由此盘松动在电子镇流器，包括：一个光衰采样模块（8），用于检测所述气体放电灯的发光衰变变化; 单片机（7），用于匹配用于气体放电灯。根据由发光衰变采样模块检测到的光衰变化对应的实际电力值; 和半桥逆变器（6），用于调节所述的气体放电灯gemäß的输出功率由单片机微机匹配的实际功率值。 电子镇流器可以延长气体放电灯的使用寿命，并节省更多的能量与由现有的发明的电子镇流器相比。

公开(公告)号：EP2271188A3

公开(公告)日：2012-12-05

申请号：EP10160444.5

申请日：2010-04-20

申请人： Murata Manufacturing Co., Ltd.

发明人： Miyazaki, Kengo ,  Toda, Takafumi

IPC分类号： H05B41/288 ,  H05B41/38 ,  H05B41/292

CPC分类号： H05B41/2883 ,  H05B41/2928 ,  Y02B20/208

摘要： The switching frequency of an AC voltage applied to an LC series circuit including an inductor and a capacitor is swept near a frequency having a value given by dividing the resonant frequency of the LC series circuit by an odd number at startup of a discharge lamp and is set to a frequency near or higher than the frequency after the sweeping after the switching frequency is swept to control the on-off duty ratio of switching elements in a DC-AC inverter circuit and, after the operation at startup of the discharge lamp is repeated once or a few times, the switching frequency is made lower than the frequency after the sweeping to light the discharge lamp.

公开(公告)号：EP2117284B1

公开(公告)日：2012-04-11

申请号：EP08103672.5

申请日：2008-04-23

申请人： Martin Professional A/S

发明人： Vinther, Thomas

IPC分类号： H05B41/292

CPC分类号： H05B41/2988 ,  H05B41/2928 ,  Y02B20/208

公开(公告)号：EP2023693A3

公开(公告)日：2011-11-09

申请号：EP08160777.2

申请日：2008-07-21

申请人： Osram Sylvania, Inc.

发明人： Bakre, Shashank

IPC分类号： H05B37/03 ,  H05B41/295 ,  H05B41/298

CPC分类号： H05B41/2853 ,  H02J9/065 ,  H05B41/2923 ,  H05B41/2983 ,  Y02B20/208

摘要： A ballast (e.g. a fluorescent light ballast) includes a primary ballast for powering the lamp from a power supply (e.g., utility line power) and an battery powered ballast for powering the lamp from a battery when the primary power supply is not energized by the power supply. When power supply power is restored to the ballast, the ballast shuts down the battery powered ballast and a switch circuit operably connects the lamp to the primary ballast. The ballast toggles the switch circuit such that the primary ballast detects replacement of a lamp and resets any fault detection or protection circuits (e.g., an end of lamp life circuit) that may have been triggered during the transition from battery power to power from the power supply.

公开(公告)号：EP2249628A3

公开(公告)日：2011-10-05

申请号：EP10165198.2

申请日：2008-09-26

申请人： Seiko Epson Corporation

发明人： Yamauchi, Kentaro ,  Terashima, Tetsuo ,  Takezawa, Takeshi ,  Okawa, Kazuo ,  Kimura, Keishi

IPC分类号： H05B41/292

CPC分类号： H05B41/2928 ,  Y02B20/208

摘要： A light source includes an discharge lamp including a first electrode and a second electrode emitting light by discharge between them, a drive unit performing a steady operation which supplies steady energy to the first and second electrodes and an initial operation which supplies energy to the first and second electrodes with an operation different from the steady operation before performing the steady operation, a determination unit determining states of the discharge lamp and a data storage unit storing plural initial power feeding conditions provided corresponding to states of the discharge lamp as examples of the initial operation and plural steady power feeding conditions provided corresponding to the states of the discharge lamp as examples of the steady operation, in which the drive unit performs the initial operation in any one of conditions selected from the plural initial power feeding conditions according to a determination result by the determination unit and performs the steady operation in any one of conditions selected from the plural steady power feeding conditions according to a determination result by the determination unit.