公开(公告)号：EP1988537A3

公开(公告)日：2010-10-20

申请号：EP08100077.0

申请日：2008-01-03

申请人： Samsung Electronics Co., Ltd.

发明人： Kang, Jeong-il 502-403, Samsung 5th Apartment ,  Lee, Sang-hoon ,  Park, Yung-jun 504-902, Samsung 5th Apt. ,  Kim, Su-gun 101-601, Suji Central I-park ,  Seong, Ki-bum 506-703, Mokryeon Woosung Apt

IPC分类号： G09G3/34

CPC分类号： G09G3/342 ,  G09G3/3406 ,  G09G2310/0237 ,  G09G2310/024 ,  G09G2320/0261 ,  H05B41/2824 ,  H05B41/2881 ,  H05B41/3928 ,  Y02B20/186 ,  Y02B20/202

摘要： A backlight unit driving apparatus is provided. The backlight unit driving apparatus includes a plurality of flash lamps (100-1,100-2,100-n) at a backlight unit (100) to supply light to a liquid crystal panel, supplies voltage necessary for discharge, and supplies a discharge initiating voltage so that the flash lamps can emit lights in a sequential order. Accordingly, motion picture characteristics improve, and good screen brightness is maintained.

公开(公告)号：EP2169816A1

公开(公告)日：2010-03-31

申请号：EP09168772.3

申请日：2009-08-27

申请人： Osram Gesellschaft mit beschränkter Haftung

发明人： Li, Shangbin ,  MA, Changsong

IPC分类号： H02M1/36 ,  H02M1/42

CPC分类号： H02M1/36 ,  H02M1/4225 ,  H02M2001/0006 ,  H05B41/2824 ,  Y02B20/186 ,  Y02B70/126

摘要： The present invention provides a startup circuit for a power factor correction controller chip (U1), which includes a rectification circuit (D1,D2,D3,D4) and a charge pump circuit (C2,R5,D7,C5). The output of the rectification circuit is connected to the supply voltage pin (Vcc) of the chip (U1) through a startup resistor (R1), and the output of the charge pump circuit is connected with the supply voltage pin (Vcc) of the chip (U1). The startup circuit includes a first current path (Q1,D5) and a second current path (R2,Q2), wherein an input of the first current path is connected with the startup resistor (R1), and an output thereof is connected with the supply voltage pin (Vcc) of the chip; an input of the second current path is connected with the startup resistor (R1), and an output thereof is connected with a ground potential. When the power is turned on, the first current path is ON, and the second current path is OFF. When the PFC controller chip works normally, the first current path is OFF, and the second current path is ON.

摘要翻译： 本发明提供了一种用于功率因数校正控制器芯片（U1）的启动电路，其包括整流电路（D1，D2，D3，D4）和电荷泵电路（C2，R5，D7，C5）。 整流电路的输出通过启动电阻（R1）连接到芯片（U1）的电源电压引脚（Vcc），电荷泵电路的输出端与电源电压引脚（Vcc）连接， 芯片（U1）。 启动电路包括第一电流路径（Q1，D5）和第二电流路径（R2，Q2），其中第一电流路径的输入与启动电阻器（R1）连接，并且其输出端与 电源电压引脚（Vcc）; 第二电流路径的输入与启动电阻（R1）连接，其输出与地电位连接。 当电源接通时，第一电流路径为ON，第二电流路径为OFF。 当PFC控制器芯片工作正常时，第一个电流路径为OFF，第二个电流路径为ON。

公开(公告)号：EP2098100A2

公开(公告)日：2009-09-09

申请号：EP06785955.3

申请日：2006-06-30

申请人： IDEA, INC. ,  Lu, Chao-Cheng

发明人： LU, Chao-Cheng

IPC分类号： H05B37/02 ,  H05B41/16

CPC分类号： H05B41/2824 ,  Y02B20/186

摘要： A power source apparatus is disclosed in this invention, specifically a power source apparatus apparatus comprising a voltage amplitu control unit (IC2) that employs an active power factor corrector (100) to control the output DC voltage by applying positive or negati logic control voltage, incorporated with high frequency power source circuit (200) and high frequency transformer (300), brightness o cold cathode fluorescent lamp (CCFL) or external electrode fluorescent lamp (EEFL) are controllable and DC power (700) is directly applied to a DC load Such method is accomplished by adjusting the amplitude of the supplying DC voltage for controlling the amplitude of the high frequency voltage of CCFL or EEFL, thus called voltage amplitude method (VAM) Because of the characteristics of stable frequency, high resolution and linearity, VAM is broadly used m the control of luminance of discharge tubes, such as TFT-LCD TVs, LCD monitors and advertisement lamps The impulse width controller (6O0) of the present invention achieve the luminance control of CCFL or EEFL inside or outside the glow discharge zone

公开(公告)号：EP1424879B1

公开(公告)日：2009-03-11

申请号：EP03103649.4

申请日：2003-10-02

申请人： ROBERT BOSCH GMBH

发明人： Krespach, Andreas

IPC分类号： H05B41/00 ,  H05B41/282 ,  H05B41/24

CPC分类号： H05B41/2824 ,  H05B41/245

公开(公告)号：EP1198160A3

公开(公告)日：2008-11-12

申请号：EP01119719.1

申请日：2001-08-24

申请人： Hitachi, Ltd. ,  Hitachi Device Engineering Co., Ltd.

发明人： Hirakata, Junichi, Hitachi, Ltd., Int. Prop. Gp. ,  Ono, Kikuo, Hitachi, Ltd., Int. Prop. Gp. ,  Shingai, Akira

IPC分类号： H05B41/36 ,  G02F1/13357

CPC分类号： H05B41/2821 ,  G02F1/133604 ,  G02F2001/133612 ,  G09G3/342 ,  G09G2310/024 ,  G09G2320/0261 ,  G09G2320/041 ,  G09G2320/0633 ,  G09G2320/064 ,  G09G2320/066 ,  G09G2330/045 ,  H05B41/2824 ,  H05B41/3927

摘要： A liquid crystal display device includes a liquid crystal display panel (2,3) and a lighting device (8,10). The lighting device is supplied with alternately a first current during a period t 1 and a second current during a second period t 2 such that electric power E1 is lower than electric power E2. E1 is defined as (t 1 × i p-p (1) × V p-p (1))/2+(t 2 × i p-p (2) × V p-p (2))/2, where i p-p = a peak-to-peak value of the first current, V p-p (1) = a peak-to-peak value of a voltage across the light source during the period t 1 , i p-p (2) = a peak-to-peak value of the second current, and V p-p (2) = a peak-to-peak value of a voltage across the light source during the period t 1 . E2 is defined as (t 1 + t 2 )× I off × V off , where I off and V off are effective values of the current and voltage of the light source, respectively.

公开(公告)号：EP1906519A2

公开(公告)日：2008-04-02

申请号：EP07018557.4

申请日：2007-09-21

申请人： Samsung Electronics Co., Ltd.

发明人： Gwon, Dal-jung ,  Kang, Moon-shik ,  Kwon, Young-sub ,  Hwang, Eui-dong

IPC分类号： H02M7/5387 ,  H05B41/282

CPC分类号： H05B41/2824

摘要： A power supply apparatus capable of reducing power consumption and a liquid crystal display including the power supply apparatus includes a first DC-AC converting unit (250) enabled by a driving signal (CONT) to convert a DC voltage into a first AC voltage, increase the first AC voltage, and supply the increased first AC voltage as a first power supply voltage (Vac_1); a switching unit (260) which selectively transmits the driving signal (CONT) in response to a selection signal (SEL); and a second DC-AC converting unit (270) enabled by the driving signal (CONT) selectively transmitted by the switching unit (260) to convert the DC voltage into a second AC voltage, increase the second AC voltage, and supply the increased second AC voltage as a second power supply voltage (Vac_2).

摘要翻译： 一种能够降低功耗的电源装置和包括电源装置的液晶显示器，包括：通过驱动信号（CONT）使第一DC-AC转换单元（250），将DC电压转换为第一AC电压，增加 第一交流电压，并将增加的第一交流电压作为第一电源电压（Vac_1）提供; 切换单元（260），其响应于选择信号（SEL）选择性地发送所述驱动信号（CONT）; 以及通过由开关单元选择性地传输的驱动信号（CONT）使得能够将DC电压转换为第二AC电压的第二DC-AC转换单元（270），从而增加第二AC电压，并且增加第二AC电压 交流电压作为第二电源电压（Vac_2）。

公开(公告)号：EP1814367A1

公开(公告)日：2007-08-01

申请号：EP05748848.8

申请日：2005-06-07

申请人： MINEBEA Co., Ltd.

发明人： SUZUKI, Shinichi, c/o Minebea Co., Ltd. ,  SUZUKI, Yoshihito, c/o Minebea Co., Ltd.

IPC分类号： H05B41/24 ,  H02M7/48

CPC分类号： H05B41/2822 ,  H02M7/48 ,  H02M2001/009 ,  H05B41/2824 ,  H05B41/2827 ,  H05B41/2828

摘要： A backlight inverter in which surface luminance of an LCD is stabilized as compared with that at CCFL actuating by supplying a stabilized lamp current, with no influence by lamp temperature, and its driving method. In a backlight inverter (1) where a plurality of inverter transformers (1) are connected with a plurality of cold cathode lamps (5), primary windings formed on the primary side of the inverter transformers (4) are connected in series, a resonance circuit of leakage inductance and capacitance is formed on the secondary side of each inverter transformer (4), and the inverter transformer (4) is driven at an operating frequency lower than or equal to the intermediate frequency between the series resonance frequency and the parallel resonance frequency in the resonance circuit but higher than or equal to a frequency showing the peak of phase characteristics curve viewed from the primary side of the inverter transformer.

摘要翻译： 一种背光逆变器，其中通过在不受灯温度影响的情况下提供稳定的灯电流和其驱动方法，与CCFL致动相比，LCD的表面亮度稳定。 在多个逆变器变压器（1）与多个冷阴极灯（5）连接的背光源逆变器（1）中，形成在逆变变压器（4）的一次侧的初级绕组串联连接，共振 在每个逆变变压器（4）的次级侧形成漏电感和电容电路，逆变器变压器（4）以低于或等于串联谐振频率和并联谐振之间的中频的工作频率被驱动 频率，但高于或等于表示从逆变变压器的初级侧观察的相位特性曲线的峰值的频率。

公开(公告)号：EP1559300A2

公开(公告)日：2005-08-03

申请号：EP03769262.1

申请日：2003-08-27

申请人： Harman/Becker Automotive Systems GmbH

发明人： SCHANZ, Christian ,  RUPPRECHT, Matthias

IPC分类号： H05B41/42

CPC分类号： H05B41/3927 ,  H05B41/2824 ,  Y02B20/186

摘要： The invention relates to a control system for at least two light tubes (6, 7) connected to a common transformer circuit (5). The aim of said invention is to prevent in a relatively simple manner the instability of the tubes, in particular a flicker thereof. The inventive control system (2) comprises a control circuit (3) which is provided with at least two detection inlets (a2, a3) used for detecting lamp currents (l1, l2) passing through the light tubes (6, 7) The detected lamp currents (l1, l2) can be regulated to a day mode with a high current intensity and to a night mode with a low current intensity by means of the control circuit (3). The lamp currents (l1, l2) can be detected individually in day mode and in a common manner in night mode.

公开(公告)号：EP1198160A2

公开(公告)日：2002-04-17

申请号：EP01119719.1

申请日：2001-08-24

申请人： Hitachi, Ltd. ,  Hitachi Device Engineering Co., Ltd.

发明人： Hirakata, Junichi, Hitachi, Ltd., Int. Prop. Gp. ,  Ono, Kikuo, Hitachi, Ltd., Int. Prop. Gp. ,  Shingai, Akira

IPC分类号： H05B41/36 ,  G02F1/13357

CPC分类号： H05B41/2821 ,  G02F1/133604 ,  G02F2001/133612 ,  G09G3/342 ,  G09G2310/024 ,  G09G2320/0261 ,  G09G2320/041 ,  G09G2320/0633 ,  G09G2320/064 ,  G09G2320/066 ,  G09G2330/045 ,  H05B41/2824 ,  H05B41/3927

摘要： A liquid crystal display device includes a liquid crystal display panel (2,3) and a lighting device (8,10). The lighting device is supplied with alternately a first current during a period t 1 and a second current during a second period t 2 such that electric power E1 is lower than electric power E2. E1 is defined as (t 1 × i p-p (1) × V p-p (1))/2+(t 2 × i p-p (2) × V p-p (2))/2, where i p-p = a peak-to-peak value of the first current, V p-p (1) = a peak-to-peak value of a voltage across the light source during the period t 1 , i p-p (2) = a peak-to-peak value of the second current, and V p-p (2) = a peak-to-peak value of a voltage across the light source during the period t 1 . E2 is defined as (t 1 + t 2 )× I off × V off , where I off and V off are effective values of the current and voltage of the light source, respectively.

摘要翻译： 液晶显示装置包括液晶显示面板（2,3）和照明装置（8,10）。 照明装置在时间段t 1期间交替提供第一电流，在第二时段t 2期间被提供给第二电流，使得电力E1低于电力E2。 E1定义为（t 1×i pp（1）×V pp（1））/ 2+（t 2×i pp（2）×V pp（2））/ 2，其中i pp = - 第一电流的峰值V pp（1）=在时段t 1期间光源两端的电压的峰 - 峰值，i pp（2）=第二电流的峰 - 峰值 电流和V pp（2）=在时段t 1期间光源两端的电压的峰 - 峰值。 E2定义为（t 1 + t 2）×I off×V off，其中I off和V off分别是光源的电流和电压的有效值。

公开(公告)号：EP1118253A2

公开(公告)日：2001-07-25

申请号：EP99945491.1

申请日：1999-09-03

申请人： Electro-Mag International Inc.

发明人： MOISIN, Mihail, S.

IPC分类号： H05B41/28 ,  H02M1/00 ,  H05B41/282 ,  H05B41/392

CPC分类号： H02M1/4258 ,  H05B41/28 ,  H05B41/2822 ,  H05B41/2824 ,  H05B41/3921 ,  Y02B70/126

摘要： A circuit having a full bridge configuration with a single actively biased switching element. In one embodiment, the circuit is a ballast circuit having a full bridge inverter with one switching element. The bridge includes a diode coupled to the switching element such that the diode and the switching element are coupled between positive and negative rails of the inverter. The bridge further includes first and second capacitors coupled end to end across the positive and negative rails. The ballast circuit can be coupled to a rectifier/boost circuit having a boost inductor coupled to the inverter circuit. In an exemplary embodiment, a ballast circuit includes an inverter circuit having a switching element with a conduction state controlled by a control circuit which limits a voltage applied to the lamp. The control circuit provides a conduction control signal to a duty cycle control circuit. The conduction control signal alternately biases the switching element to conductive and non-conductive states at a first duty cycle when the lamp voltage is below a predetermined level. When the lamp voltage becomes greater than the predetermined level, the duty cycle control circuit decreases the switching element to a second duty cycle, which is less than the first duty cycle, to reduce the voltage at the lamp.