公开(公告)号：US20070262733A1

公开(公告)日：2007-11-15

申请号：US11798274

申请日：2007-05-11

申请人： Feng-Li Lin

发明人： Feng-Li Lin

IPC分类号： H05B39/00

CPC分类号： H05B41/282 ,  G09G3/3406 ,  G09G2320/0247 ,  G09G2320/0646

摘要： A control method for a backlight module having a driving circuit and at least one lighting element includes the steps of controlling the driving circuit to drive the lighting element according to a first-type control signal before a first time instant, controlling the driving circuit to drive the lighting element according to a transition modulation signal at a time instant between the first time instant and a second time instant, and controlling the driving circuit to drive the lighting element according to a second-type control signal after the second time instant.

摘要翻译： 一种用于具有驱动电路和至少一个照明元件的背光模块的控制方法，包括以下步骤：控制驱动电路，以在第一时刻之前根据第一类控制信号驱动发光元件，控制驱动电路驱动 所述照明元件根据在所述第一时刻和第二时刻之间的时刻的转换调制信号，并且控制所述驱动电路，以在所述第二时刻之后根据第二类型控制信号驱动所述照明元件。

公开(公告)号：US20070182345A1

公开(公告)日：2007-08-09

申请号：US11647117

申请日：2006-12-29

申请人： Po-Wen Wang ,  Chia-Tse Yeh ,  Chien-Kun Huang

发明人： Po-Wen Wang ,  Chia-Tse Yeh ,  Chien-Kun Huang

IPC分类号： H05B41/36

CPC分类号： H05B41/2821 ,  H05B41/282

摘要： A monitor and a power circuit thereof. The monitor includes a power circuit and a lamp. The power circuit driving the lamp to emit light includes an AC-to-DC converter, a transformer, a switch, a pulse width modulation (PWM) unit, a DC filter and a Royer circuit. The AC-to-DC converter receives a first AC voltage and generates a first DC voltage. The transformer has a secondary side coil for generating a second AC voltage, and a primary side coil, which has one end for receiving the first DC voltage and the other end coupled to a low potential through the switch. The PWM unit controls the switch to turn on to adjust the second AC voltage. The DC filter filters the second AC voltage into a second DC voltage. The Royer circuit generates a third AC voltage for driving the lamp to emit the light according to the second DC voltage.

摘要翻译： 监视器及其电源电路。 显示器包括电源电路和灯。 驱动灯发光的电源电路包括AC-DC转换器，变压器，开关，脉冲宽度调制（PWM）单元，DC滤波器和Royer电路。 AC-DC转换器接收第一AC电压并产生第一DC电压。 变压器具有用于产生第二AC电压的次级侧线圈和用于接收第一DC电压的一端和通过开关耦合到低电位的另一端的初级侧线圈。 PWM单元控制开关打开以调整第二个交流电压。 直流滤波器将第二交流电压滤波成第二直流电压。 Royer电路产生第三AC电压，用于驱动灯以根据第二DC电压发光。

公开(公告)号：US20070152599A1

公开(公告)日：2007-07-05

申请号：US11320875

申请日：2005-12-30

申请人： Chun-Kong Chan ,  Jeng-Shong Wang

发明人： Chun-Kong Chan ,  Jeng-Shong Wang

IPC分类号： B60Q1/02

CPC分类号： H05B41/282 ,  H01F27/326 ,  H01F38/10 ,  Y02B20/183

摘要： A power transformer combined with balance windings is used for driving a CCFL. The power transformer makes use of a ferrite core structure to achieve a closed magnetic circuit, and is combined with balance windings. When used in application circuits, the power transformer combined with balance windings can provide stable induction voltages and balance load currents to CCFLs to enhance the luminous efficiency and uniformity of the CCFLs, thereby improving the drawbacks of a irregular current flowing through the CCFLs and too high a manufacturing cost of conventional CCFL application circuits.

摘要翻译： 与平衡绕组组合的电力变压器用于驱动CCFL。 电力变压器利用铁氧体磁芯结构实现封闭磁路，并与平衡绕组组合。 当应用电路中使用时，与平衡绕组组合的电力变压器可以提供稳定的感应电压并平衡CCFL的负载电流，以提高CCFL的发光效率和均匀性，从而改善流过CCFL的不规则电流的缺点，并且太高 常规CCFL应用电路的制造成本。

公开(公告)号：US07235932B2

公开(公告)日：2007-06-26

申请号：US10903461

申请日：2004-07-30

申请人： Earl F. Crandall ,  Ray King

发明人： Earl F. Crandall ,  Ray King

IPC分类号： H05B41/16

CPC分类号： H05B41/3927 ,  H05B41/282

摘要： An electronic ballast for a gas discharge lamp includes an adjustable constant current source circuit adapted to convert a direct current input to provide an initial start current and a variably controlled constant current. A coupling transformer circuit is connected to the adjustable constant current source and adapted to couple the initial start current to the gas discharge lamp to provide a corresponding start voltage approximately equal to a strike voltage of the gas discharge lamp and to convert the variably controlled constant current to a square wave current to power the gas discharge lamp thereafter. A current sense circuit is adapted to sense an operating current at the coupling transformer and to provide corresponding current sense information to the adjustable constant current source, wherein said current sense information is used to vary the variably controlled constant current.

摘要翻译： 用于气体放电灯的电子镇流器包括可调恒流源电路，其适于转换直流输入以提供初始启动电流和可变控制的恒定电流。 耦合变压器电路连接到可调恒流源，并且适于将初始启动电流耦合到气体放电灯，以提供大致等于气体放电灯的触发电压的相应启动电压，并将可变控制的恒定电流 到其后的气体放电灯的方波电流。 电流感测电路适于感测耦合变压器上的工作电流并且向可调恒定电流源提供相应的电流感测信息，其中所述电流感测信息用于改变可变控制的恒定电流。

公开(公告)号：US20070103089A1

公开(公告)日：2007-05-10

申请号：US11645955

申请日：2006-12-27

申请人： Gilbert Fregoso

发明人： Gilbert Fregoso

IPC分类号： H05B39/04

CPC分类号： H05B41/2856 ,  H05B41/282

摘要： A circuit for driving cold cathode tubes and external electrode fluorescent lamps uses only 19-26 watts of power. A steady state square wave oscillator generator sets a running frequency for the circuit. A high voltage inductor or high voltage/high frequency transformer in combination with a current limiting capacitor, the lamp and two low resonance value capacitors in series are set and tuned to the oscillation frequency to achieve resonance with the oscillator. The circuit requires an input that has been capacitively and inductively filtered to eliminate harmonic noise in and out of the input line. A thermal shutdown feedback circuit monitors temperature of the circuit. Further, a non-inductive or non-capacitive loading lamp detection feedback and a lamp disconnect driver eliminates false disconnects at start up due to cold bulbs and allows all lamps running on the circuit to continue operation if one is disconnected.

摘要翻译： 用于驱动冷阴极管和外部电极荧光灯的电路仅使用19-26瓦的功率。 稳态方波发生器设置电路的运行频率。 高压电感器或高压/高频变压器与限流电容器组合，灯和串联的两个低谐振电容器被设置并调谐到振荡频率以实现与振荡器的共振。 该电路需要一个已经电容和电感滤波的输入，以消除输入和输出的谐波噪声。 热关断反馈电路监测电路的温度。 此外，非感性或非电容性加载灯检测反馈和灯断开驱动器消除由于冷灯泡引起的启动时的假断开，并允许在电路上运行的所有灯在断开连接时继续运行。

公开(公告)号：US07208886B2

公开(公告)日：2007-04-24

申请号：US11163433

申请日：2005-10-19

申请人： Kuan-Hong Hsieh ,  Wei-De Bao

发明人： Kuan-Hong Hsieh ,  Wei-De Bao

IPC分类号： H05B37/02 ,  H05B41/36

CPC分类号： H05B41/382 ,  H05B41/282 ,  H05B41/386

摘要： A starting voltage adjustment circuit (70), which can vary starting voltages to CCFLs (40) according to variations in the temperature of the immediate environment, is employed in an apparatus for driving CCFLs. The starting voltage adjustment circuit includes a zener diode (710), a thermal resistor (720), and a voltage dividing resistor (730) connected in series between a buck converter, a resonant boost converter, and ground. The starting voltage adjustment circuit also includes a control chip (740) which includes pins, of which one is connected between the thermal resistor and the voltage dividing resistor and outputs a constant voltage, and another is connected between the voltage dividing resistor and ground. The thermal resistor has a voltage drop thereacross varying with the temperature. The starting voltage adjustment circuit adjusts an input voltage to the resonant boost converter, thereby adjusting the starting voltage to the CCFLs according to variations in temperature.

摘要翻译： 在用于驱动CCFL的装置中采用起动电压调节电路（70），该启动电压调节电路（70）可根据直接环境的温度变化而将启动电压改变为CCFL（40）。 启动电压调节电路包括串联连接在降压转换器，谐振升压转换器和地之间的齐纳二极管（710），热电阻器（720）和分压电阻器（730）。 启动电压调整电路还包括控制芯片（740），其包括引脚，其中一个连接在热电阻器和分压电阻器之间并输出恒定电压，另一个连接在分压电阻器和地之间。 热敏电阻具有随温度变化的电压降。 启动电压调节电路调节到谐振升压转换器的输入电压，从而根据温度变化调节CCFL的启动电压。

公开(公告)号：US20070069662A1

公开(公告)日：2007-03-29

申请号：US11237930

申请日：2005-09-29

申请人： Chun-Kong Chan ,  Jeng-Shong Wang

发明人： Chun-Kong Chan ,  Jeng-Shong Wang

IPC分类号： H05B41/24

CPC分类号： H05B41/282 ,  Y02B20/183

摘要： The current-balancing circuit for lamps of the present invention adopts a plurality of transformers having a primary winding and a secondary winding. One end of the secondary winding of the transformer is connected with a lamp and another end of the secondary winding of the transformer is connected with an AC power via the primary winding of a neighboring transformer. By the above linking method, the power provides and balances the working current for the lamps via the transformers, and improves upon the drawbacks, including the inductance on the coils of the prior art being different and it not being able to be applied to lamps with an odd quantity and only can be applied to the lamps with an even quantity.

摘要翻译： 本发明的电流平衡电路采用多个具有初级绕组和次级绕组的变压器。 变压器的次级绕组的一端与灯连接，变压器的次级绕组的另一端通过相邻变压器的初级绕组与交流电连接。 通过上述连接方法，功率通过变压器提供和平衡灯的工作电流，并且改进了缺点，包括现有技术的线圈上的电感是不同的，并且不能应用于具有 奇数，只能用于均匀的灯。

公开(公告)号：US20070057643A1

公开(公告)日：2007-03-15

申请号：US11245947

申请日：2005-10-06

申请人： Changshan Zhang ,  Jun Ye ,  Lieyi Fang

发明人： Changshan Zhang ,  Jun Ye ,  Lieyi Fang

IPC分类号： H05B41/36

CPC分类号： H05B41/282 ,  H05B41/2853

摘要： System and method for driving a cold-cathode fluorescent lamp. The system includes a control subsystem configured to generate one or more control signals, and a power supply subsystem configured to receive the one or more control signals and a DC input voltage, convert the DC input voltage to an AC output voltage, and send the AC output voltage to a cold-cathode fluorescent lamp. If the DC input voltage is lower than a predetermined threshold, the system for driving the cold-cathode fluorescent lamp is turned off in response to the one or more control signals.

摘要翻译： 用于驱动冷阴极荧光灯的系统和方法。 该系统包括配置成产生一个或多个控制信号的控制子系统和被配置为接收一个或多个控制信号和DC输入电压的电源子系统，将DC输入电压转换成AC输出电压，并且发送AC 输出电压到冷阴极荧光灯。 如果直流输入电压低于预定阈值，则根据一个或多个控制信号关闭用于驱动冷阴极荧光灯的系统。

公开(公告)号：US07190128B2

公开(公告)日：2007-03-13

申请号：US10960060

申请日：2004-10-08

申请人： Chien-Chih Chen ,  Tsai-Fu Wu ,  Yu-Tien Chuang

发明人： Chien-Chih Chen ,  Tsai-Fu Wu ,  Yu-Tien Chuang

IPC分类号： H05B41/16

CPC分类号： H05B41/245 ,  H05B41/282 ,  Y02B20/183

摘要： A multi-lamp driving system for driving lamp units includes a multi-phase alternating current (AC) power generating unit for generating a plurality of out-of-phase AC current signals, and a balancing unit for balancing current flowing through each lamp unit. The balancing unit includes a plurality of loads, and a multi-phase transformer that has a plurality of coils. Each lamp unit is adapted to be connected to at least one of a respective load and a respective coil, and forms a series connection with the respective load and the respective coil. The series connection of each lamp unit with the respective load and the respective coil is coupled across the AC power generating unit.

摘要翻译： 用于驱动灯单元的多灯驱动系统包括用于产生多个异相AC电流信号的多相交流（AC）发电单元和用于平衡流过每个灯单元的电流的平衡单元。 平衡单元包括多个负载，以及具有多个线圈的多相变压器。 每个灯单元适于连接到相应负载和相应线圈中的至少一个，并且与相应负载和相应线圈形成串联连接。 每个灯单元与相应负载和相应线圈的串联连接跨过交流发电单元耦合。

公开(公告)号：US07176637B2

公开(公告)日：2007-02-13

申请号：US11232945

申请日：2005-09-23

申请人： Masaki Inoue ,  Hiroyuki Kushida ,  Takahiro Hiraoka

发明人： Masaki Inoue ,  Hiroyuki Kushida ,  Takahiro Hiraoka

IPC分类号： G05F1/00

CPC分类号： H05B41/282 ,  H05B41/2806 ,  Y02B20/183 ,  Y02B20/22

摘要： When a control unit is operated by a lighting control signal, when a reference voltage source unit outputs the reference voltage, voltage inputted into an error amplifier from a time constant circuit increases gradually with passage of time so as to reach the reference voltage. The error amplifier compares the voltage, which gradually increases with a power to be impressed to a lamp. An inverter circuit controls power to be supplied to the lamp according to the error signal. Thereby, the lamp power is controlled at time immediately after the lamp lighting signal is inputted. In addition, by providing a thermo-sensitive element for detecting circumference environmental temperature, it is possible to reduce influence to the light intensity due to the circumference environmental temperature. Further, the time constant circuit and the thermo-sensitive element may be provided in the detecting circuit.

摘要翻译： 当控制单元由照明控制信号操作时，当参考电压源单元输出参考电压时，从时间常数电路输入到误差放大器的电压随着时间的推移逐渐增加以达到参考电压。 误差放大器将电压进行比较，电压随着向电灯施加的功率逐渐增加。 逆变器电路根据误差信号控制向灯提供的电力。 由此，在输入灯点亮信号后立即控制灯功率。 此外，通过设置用于检测周围环境温度的热敏元件，可以减少由于周围环境温度对光强度的影响。 此外，时间常数电路和热敏元件可以设置在检测电路中。