公开(公告)号：US20180252994A1

公开(公告)日：2018-09-06

申请号：US15905136

申请日：2018-02-26

申请人： SEIKO EPSON CORPORATION

发明人： Shun SATO

IPC分类号： G03B21/20 ,  H05B41/288 ,  H04N9/31

CPC分类号： G03B21/2053 ,  G03B21/006 ,  G03B21/2026 ,  G03B33/12 ,  H04N9/3102 ,  H04N9/3105 ,  H04N9/3155 ,  H05B41/2887

摘要： In a discharge lamp driver, a control section is configured to alternately repeat a first period in which an AC current is supplied and a second period in which a DC current is supplied, and when a first drive power lower than a rated power of the discharge lamp is supplied and an accumulated lighting time of the discharge lamp is shorter than a predetermined time, the control section is configured to set the length of the first period to be greater than that in a case where the first drive power is supplied and the accumulated lighting time is equal to or longer than the predetermined time, and set the frequency of the AC current during the first period to be higher than that in the case where the first drive power is supplied and the accumulated lighting time is equal to or longer than the predetermined time.

公开(公告)号：US10021359B2

公开(公告)日：2018-07-10

申请号：US15329338

申请日：2015-07-23

申请人： USHIO DENKI KABUSHIKI KAISHA

发明人： Koji Yamada ,  Shigeyoshi Matsumoto

IPC分类号： H04N9/31 ,  G03B21/20

CPC分类号： H04N9/3155 ,  G03B21/2026 ,  G09G3/002 ,  G09G3/34 ,  G09G3/36 ,  G09G2320/0247 ,  H04N9/3179 ,  H05B41/2887 ,  Y02B20/202

摘要： The discharge lamp lighting device for supplying alternating current to a discharge lamp includes: a power supply control part having a segment signal generation part, a peak value control part, and a frequency control part; and a power supply part. The peak value control part sets a specific segment period, which indicates a value where a value of integral corresponding to a product of the length of the segment period and a peak value set in a segment period is most deviated from an average value of the values of integral within the specific period, to a period other than a final segment period positioned at the final end of the specific period, among a plurality of segment periods belonging to the specific period.

公开(公告)号：US09897902B2

公开(公告)日：2018-02-20

申请号：US15408049

申请日：2017-01-17

申请人： SEIKO EPSON CORPORATION

发明人： Tetsuo Terashima

IPC分类号： G03B21/20 ,  H05B41/36 ,  H05B41/24 ,  G03B21/00

CPC分类号： G03B21/2053 ,  G03B21/006 ,  G03B21/2026 ,  H05B41/24 ,  H05B41/2887 ,  H05B41/36 ,  Y02B20/202

摘要： A discharge lamp driving device includes a discharge lamp driving section configured to supply a driving current to a discharge lamp including a first electrode and a second electrode and a control section configured to control the discharge lamp driving section. The control section is configured to repeat a unit period. The unit period includes a direct current period including a first direct current period in which a direct current having a first polarity is supplied to the discharge lamp and a second direct current period in which a direct current having a second polarity is supplied to the discharge lamp, and an alternating current period provided between the first direct current period and the second direct current period, an alternating current being supplied to the discharge lamp in the alternating current period. The control section is configured to temporally change length of the direct current period.

公开(公告)号：US20170231074A1

公开(公告)日：2017-08-10

申请号：US15501614

申请日：2015-08-05

申请人： USHIO DENKI KABUSHIKI KAISHA

发明人： Kosuke SAKA ,  Minoru FUKUDA ,  Shigeyoshi MATSUMOTO ,  Shoichi TERADA

IPC分类号： H05B41/36

CPC分类号： H05B41/36 ,  H01J61/00 ,  H01J61/04 ,  H01J61/0732 ,  H01J61/12 ,  H01J61/26 ,  H01J61/822 ,  H05B41/2886 ,  H05B41/2887 ,  Y02B20/202

摘要： A discharge lamp lighting device includes a control unit adapted to control a frequency of the AC electric current supplied to a discharge lamp by a feeding unit, in different manners within a first term and a second term which are alternately repeated, the control unit is adapted to control the frequency of the AC electric current such that, within the first term, the frequency of the AC electric current becomes at least one frequency out of plural set frequencies, and is further adapted to control the frequency of the AC electric current, based on a predetermined frequency and an electric current within the previous first term, such that, within the second term, the frequency of the AC electric current becomes a frequency lower than this predetermined frequency.

公开(公告)号：US20170219919A1

公开(公告)日：2017-08-03

申请号：US15407553

申请日：2017-01-17

申请人： SEIKO EPSON CORPORATION

发明人： Satoshi KITO ,  Shun SATO

IPC分类号： G03B21/20 ,  H05B41/24 ,  G03B21/00 ,  H05B41/36

CPC分类号： G03B21/2053 ,  G03B21/006 ,  G03B21/2026 ,  H05B41/2887 ,  H05B41/36

摘要： In a discharge lamp driving device, a mixed period is provided, in which a first period in which an alternating current is supplied and a second period in which a direct current is supplied are alternately repeated and a third period alternately including a first direct current period and a second direct current period in which a direct current having a polarity opposite to a polarity of the direct current in the first direct current period is supplied. Length of the second direct current period is smaller than 0.5 ms. A total of lengths of the first direct current periods in the third period is larger than length of the second period. The third period is not provided at least when the inter-electrode voltage is smaller than a first predetermined value or when a cumulative lighting time of the discharge lamp is smaller than a second predetermined value.

公开(公告)号：US09699875B2

公开(公告)日：2017-07-04

申请号：US14367249

申请日：2012-12-19

申请人： OSRAM GmbH

发明人： Juergen Mueller ,  Norbert Magg

IPC分类号： G03B21/20 ,  H04N9/31 ,  H05B41/288

CPC分类号： H05B41/2887 ,  G03B21/2026 ,  G03B21/2053 ,  H04N9/3114 ,  H04N9/3155 ,  Y02B20/202

摘要： Various embodiments relates to a DLP (digital light processing) projector for projecting at least one image on a projection surface. A discharge lamp is driven by a current waveform having at least one first region, to which a first frequency is assigned, and a second region, to which a second frequency is assigned, wherein the first region is established by a first commutation and a following second commutation, wherein the second region is established by the region between the second commutation and a following first commutation, wherein further commutations can occur within the second region, wherein a modulation factor is defined by the ratio of second frequency to first frequency, wherein the modulation factor is at least 3. A method for projecting at least one image is also disclosed.

公开(公告)号：US09602791B2

公开(公告)日：2017-03-21

申请号：US15045739

申请日：2016-02-17

申请人： SEIKO EPSON CORPORATION

发明人： Tetsuo Terashima ,  Yoichi Nakagomi

IPC分类号： H04N9/31 ,  G03B21/20 ,  G03B21/00 ,  H05B41/292 ,  H05B41/288

CPC分类号： H04N9/3197 ,  G03B21/006 ,  G03B21/2053 ,  H04N9/3123 ,  H04N9/3141 ,  H04N9/3179 ,  H05B41/2887 ,  H05B41/2928 ,  Y02B20/202

摘要： A discharge lamp driving device includes a discharge lamp driving unit configured to supply driving current to a discharge lamp provided with a first electrode and a second electrode, and a controller configured to control the discharge lamp driving unit. The driving current includes a first AC period and a second AC period in which an AC current is supplied. The first AC period includes a plurality of consecutive first unit driving periods each of which is formed of a first polarity period and a second polarity period, a length of the first polarity period being larger than a length of the second polarity period. The second AC period includes a plurality of consecutive second unit driving periods each of which is formed of the first polarity period and the second polarity period, the length of the second polarity period being larger than the length of the first polarity period.

公开(公告)号：US09470962B2

公开(公告)日：2016-10-18

申请号：US14529722

申请日：2014-10-31

申请人： SEIKO EPSON CORPORATION

发明人： Keishi Kimura

IPC分类号： G03B21/20 ,  H05B41/288 ,  G03B35/16 ,  H04N9/31 ,  H04N13/04 ,  G02B27/22 ,  H05B41/16 ,  H05B41/24

CPC分类号： G03B21/2053 ,  G02B27/2264 ,  G03B35/16 ,  H04N9/3155 ,  H04N13/341 ,  H04N13/363 ,  H04N13/398 ,  H05B41/16 ,  H05B41/24 ,  H05B41/2887 ,  Y02B20/202

摘要： A discharge lamp driving device includes: a direct-current power supply section (a power supply section) that controls a current of power to be supplied to a discharge lamp from input power, and outputs the current; a voltage detecting section that detects a lamp voltage (a drive voltage) of the discharge lamp; and a control section that controls a modulation factor of a lamp current (a drive current) on which amplitude modulation has been performed, the lamp current (the drive current) which is supplied to the discharge lamp from the direct-current power supply section (the power supply section), in accordance with the detected lamp voltage (drive voltage) of the discharge lamp.

摘要翻译： 放电灯驱动装置包括：直流电源部（电源部），其从输入电力控制向放电灯供电的电力电流，并输出电流; 电压检测部，其检测放电灯的灯电压（驱动电压）; 以及控制部分，其控制已经进行了幅度调制的灯电流（驱动电流）的调制因数，从直流电源部分提供给放电灯的灯电流（驱动电流） 电源部），根据检测到的放电灯的灯电压（驱动电压）。

公开(公告)号：US09380686B2

公开(公告)日：2016-06-28

申请号：US13956518

申请日：2013-08-01

申请人： USHIO DENKI KABUSHIKI KAISHA

发明人： Takanori Samejima ,  Masashi Okamoto ,  Isao Miyake

IPC分类号： H05B37/02 ,  H05B41/36 ,  H05B41/288 ,  G03B21/00

CPC分类号： H05B41/36 ,  G03B21/005 ,  H05B41/2887 ,  Y02B20/202

摘要： A polarity-reversal control circuit gives a polarity-reversal order so that the polarity of an inverter is inverted each time the polarity-reversal timing notified by a signal is recognized. The number of times of consecutive appearances of a normal polarity-reversal interval period, in which an interval of adjoining polarity-reversal timings is equal to or less than an upper limit of a polarity-reversal interval desirable for a discharge lamp, is counted, and if the unusual polarity-reversal interval period, in which an interval of the adjoining polarity-reversal timing is longer than the upper limit of a polarity-reversal interval, appears, Npm is memorized as the maximum of the number of times of consecutive appearances and after that, when the polarity-reversals signal in which the number of times of consecutive appearances becomes equal to Npm is received, it is regarded as a start of an unusual polarity-reversal interval period, and additional polarity-reversal order is given.

摘要翻译： 极性反转控制电路给出极性反转顺序，使得每当通过信号通知的极性反转定时被识别时，反相器的极性反转。 计数相邻的极性反转定时的间隔等于或小于放电灯所需的极性反转间隔的上限的正常极性反转间隔周期的连续出现次数， 并且如果出现相邻极性反转定时的间隔长于极性反转间隔的上限的异常极性反转间隔周期，Npm被存储为连续出现次数的最大值 之后，当连续出现次数等于Npm的极性反转信号被接收时，将其视为异常极性反转间隔周期的开始，并且给出额外的极性反转顺序。

公开(公告)号：US20160124293A1

公开(公告)日：2016-05-05

申请号：US14890866

申请日：2014-06-05

申请人： SEIKO EPSON CORPORATION

发明人： Shun SATO

IPC分类号： G03B21/20 ,  H04N13/04 ,  H05B41/392 ,  H04N9/31 ,  G02B27/22 ,  H05B41/288

CPC分类号： G03B21/2053 ,  G02B27/2264 ,  G03B21/2026 ,  H04N9/312 ,  H04N9/3155 ,  H04N9/3197 ,  H04N13/302 ,  H04N13/315 ,  H04N13/324 ,  H04N13/341 ,  H04N13/363 ,  H05B41/2887 ,  H05B41/2928 ,  H05B41/3928 ,  Y02B20/202 ,  Y02B20/208

摘要： A light source device includes a discharge lamp configured to emit light, a discharge lamp driving unit configured to supply a driving current for driving the discharge lamp to the discharge lamp, and a control unit configured to control the discharge lamp driving unit. A driving current waveform of the driving current alternately has a first period and a second period. An absolute value of the driving current during the first period is smaller than an absolute value of the driving current during the second period. The control unit is configured to supply an alternating current as the driving current to the discharge lamp during the first period. A frequency of the alternating current during the first period is equal to or higher than 750 Hz.

摘要翻译： 光源装置包括配置为发光的放电灯，放电灯驱动单元，被配置为向放电灯提供用于驱动放电灯的驱动电流;以及控制单元，被配置为控制放电灯驱动单元。 驱动电流的驱动电流波形交替地具有第一周期和第二周期。 第一期间的驱动电流的绝对值小于第二期间的驱动电流的绝对值。 控制单元被构造成在第一时段期间将交流电作为驱动电流提供给放电灯。 在第一周期期间的交流电频率等于或高于750Hz。