公开(公告)号：US6133697A

公开(公告)日：2000-10-17

申请号：US381690

申请日：1999-09-23

申请人： Satoshi Nagai ,  Kenichiro Nishi ,  Takahisa Hamaguchi ,  Kentaro Eguchi ,  Jun Bunya ,  Osamu Ishikawa

发明人： Satoshi Nagai ,  Kenichiro Nishi ,  Takahisa Hamaguchi ,  Kentaro Eguchi ,  Jun Bunya ,  Osamu Ishikawa

IPC分类号： H05B41/392 ,  G05F1/00

CPC分类号： H05B41/3921 ,  H05B41/3925 ,  Y10S315/04

摘要： The present invention is to provide a fluorescent lamp dimming apparatus capable of continuously dimming the fluorescent lamp, and capable of eliminating a fluctuation of light outputs, and in particular, capable of turning ON the fluorescent lamp in a low temperature. The fluorescent lamp dimming apparatus is comprised of a lamp voltage detecting circuit for detecting a discharge voltage of the fluorescent lamp, and a control unit intermittently controls the output frequency of a high frequency power supply in such a manner that the output frequency becomes higher than a dimming frequency based on the dimming signal so as to periodically change a current supplied to the fluorescent lamp into a low current; and when the output frequency of the high frequency power supply becomes higher than the dimming frequency, the control unit sets a lower limit dimming set value based upon a detection voltage of the lamp voltage detecting circuit in order that the output frequency of the high frequency power supply is controlled to become lower than, or equal to the upper limit frequency in accordance with the lower limit dimming set value.

摘要翻译： PCT No.PCT / JP98 / 02073 Sec。 371 1999年9月23日第 102（e）1999年9月23日PCT PCT日期：1998年5月11日PCT公布。 公开号WO99 /​​ 59383 日期：1999年11月18日本发明提供一种荧光灯调光装置，其能够对荧光灯进行连续调光，能够消除光输出的波动，特别是能够在低温下接通荧光灯。 荧光灯调光装置包括用于检测荧光灯的放电电压的灯电压检测电路，并且控制单元以这样的方式间歇地控制高频电源的输出频率，使得输出频率变得高于 基于所述调光信号的调光频率，以便周期性地将提供给所述荧光灯的电流改变为低电流; 并且当高频电源的输出频率变得高于调光频率时，控制单元基于灯电压检测电路的检测电压设定下限调光设定值，以使高频电源的输出频率 电源根据下限调光设定值被控制为低于或等于上限频率。

公开(公告)号：US5910713A

公开(公告)日：1999-06-08

申请号：US129848

申请日：1998-08-06

申请人： Kenichiro Nishi ,  Satoshi Nagai ,  Kentaro Eguchi ,  Takeshi Arai ,  Jun Bunya ,  Kazutaka Shimizu ,  Koji Shibata ,  Isamu Ogawa

发明人： Kenichiro Nishi ,  Satoshi Nagai ,  Kentaro Eguchi ,  Takeshi Arai ,  Jun Bunya ,  Kazutaka Shimizu ,  Koji Shibata ,  Isamu Ogawa

IPC分类号： H05B37/03 ,  H05B41/285 ,  H05B41/292 ,  H05B41/392 ,  G05F1/00

CPC分类号： H05B41/2851 ,  H05B37/03 ,  H05B41/2855 ,  H05B41/2925 ,  H05B41/3921 ,  Y02B20/208 ,  Y10S315/04

摘要： A current flowing through a discharge lamp 4 is detected by a current detecting circuit 5, and the detected current is outputted as a lamp current signal A to a feedback control circuit 7 where a difference between the lamp current signal A and the dimming control signal B is obtained and amplified, and then a amplified signal D is outputted to an adder 12 which adds the amplified signal D to the dimming control signal B to constitute a control signal E. The control signal is fed back to a high frequency power supply 2. When a comparing circuit 15 detects that the light level of the dimming control signal B with respect to the full light becomes higher than or equal to 40% to 60%, the feedback circuit is disconnected by operating a switch 13 provided between an error amplifying circuit 9 and an adder 12 to stop the feedback control. When a light level of a discharge lamp 104 is smaller than or equal to a predetermined value, first and second reference voltage 108a and 108b are switched by a two-stage switching circuit 109. A comparator 107 compares a detection voltage 106 of the discharge lamp 104 with the first reference voltage 108a, or the detection voltage 106 with the second reference voltage 108b. When the voltage of the discharge lamp 104 becomes high, a control circuit 110 supplies to a high frequency power supply 102, a control signal 112 for interrupting, or reducing an output of the high frequency power supply 102.

摘要翻译： 通过电流检测电路5检测流过放电灯4的电流，将检测电流作为灯电流信号A输出到反馈控制电路7，反馈控制电路7将灯电流信号A与调光控制信号B 然后将放大信号D输出到加法器12，加法器12将放大的信号D与调光控制信号B相加，构成控制信号E.控制信号反馈给高频电源2。 当比较电路15检测到调光控制信号B相对于全光的光电平变得高于或等于40％至60％时，通过操作设置在误差放大电路之间的开关13来断开反馈电路， 9和加法器12，以停止反馈控制。 当放电灯104的亮度小于或等于预定值时，第一和第二参考电压108a和108b由两级切换电路109切换。比较器107比较放电灯104的检测电压106 104具有第一参考电压108a，或具有第二参考电压108b的检测电压106。 当放电灯104的电压变高时，控制电路110向高频电源102提供控制信号112，用于中断或降低高频电源102的输出。

公开(公告)号：US5952793A

公开(公告)日：1999-09-14

申请号：US816051

申请日：1997-03-11

申请人： Kenichiro Nishi ,  Satoshi Nagai ,  Kentaro Eguchi ,  Takeshi Arai ,  Jun Bunya ,  Kazutaka Shimizu ,  Koji Shibata ,  Isamu Ogawa

发明人： Kenichiro Nishi ,  Satoshi Nagai ,  Kentaro Eguchi ,  Takeshi Arai ,  Jun Bunya ,  Kazutaka Shimizu ,  Koji Shibata ,  Isamu Ogawa

IPC分类号： H05B37/03 ,  H05B41/285 ,  H05B41/292 ,  H05B41/392 ,  H05B37/02

CPC分类号： H05B41/2851 ,  H05B37/03 ,  H05B41/2855 ,  H05B41/2925 ,  H05B41/3921 ,  Y02B20/208 ,  Y10S315/04

摘要： A current flowing through a discharge lamp 4 is detected by a current detecting circuit 5, and the detected current is outputted as a lamp current signal A to a feedback control circuit 7 where a difference between the lamp current signal A and the dimming control signal B is obtained and amplified, and then a simplified signal D is outputted to an adder 12 which adds the amplified signal D to the dimming control signal B to constitute a control signal E. The control signal is fed back to a high frequency power supply 2. When a comparing circuit 15 detects that the light level of the dimming control signal B with respect to the full light becomes higher than or equal to 40% to 60%, the feedback circuit is disconnected by operating a switch 13 provided between an error amplifying circuit 9 and an adder 12 to stop the feedback control.

摘要翻译： 通过电流检测电路5检测流过放电灯4的电流，将检测电流作为灯电流信号A输出到反馈控制电路7，反馈控制电路7将灯电流信号A与调光控制信号B 并且然后将简化信号D输出到加法器12，加法器12将放大的信号D加到调光控制信号B以构成控制信号E.控制信号反馈给高频电源2。 当比较电路15检测到调光控制信号B相对于全光的光电平变得高于或等于40％至60％时，通过操作设置在误差放大电路之间的开关13来断开反馈电路， 9和加法器12，以停止反馈控制。