公开(公告)号：US08654067B2

公开(公告)日：2014-02-18

申请号：US13036328

申请日：2011-02-28

Applicant: Tae Wook Lee

Inventor： Tae Wook Lee

IPC: G09G3/36

CPC classification number: H05B41/2855 ,  G09G3/3406 ,  G09G3/3648 ,  G09G2330/04 ,  H05B41/285 ,  Y02B20/186

Abstract: A backlight driving apparatus of a liquid crystal display (LCD) apparatus including a master trans and a slave trans for supplying a current to a plurality of lamps, and a master driver and a slave driver for driving the lamps, includes an operated condition unit that converts an AC voltage generated in accordance with a phase difference between a master AC voltage and a slave AC voltage fed back from the master trans and the slave trans, respectively, into an analog DC voltage; a protect controller that determines an error is generated during an operation of the lamps using the analog DC voltage and outputs an operating error signal when an error is generated; and a lamp driving controller that stops driving the master driver and the slave driver in response to the operating error signal.

Abstract translation: 一种液晶显示器（LCD）装置的背光驱动装置，包括用于向多个灯提供电流的主转换器和从器件反相器，以及用于驱动灯的主驱动器和从驱动器，包括操作状态单元， 将根据主交流电压和从主反向反相的从交流电压之间的相位差分别产生的交流电压转换为模拟直流电压; 在使用模拟DC电压的灯的操作期间产生确定错误的保护控制器，并且当产生错误时输出操作错误信号; 以及灯驱动控制器，其响应于操作误差信号停止驱动主驱动器和从驱动器。

公开(公告)号：US08427068B2

公开(公告)日：2013-04-23

申请号：US12646151

申请日：2009-12-23

Applicant: Yu Jin Jang ,  Jeong In Cheon

Inventor： Yu Jin Jang ,  Jeong In Cheon

IPC: H05B37/02

CPC classification number: H05B41/285

Abstract: There are provided a reference signal generator and a PWM control circuit for LCD backlight. The reference signal generator and the PWM control circuit for LCD backlight may be configured to respectively include: a current control unit that controls generation of a variable current sequentially changing; a current generating unit that generates a variable current changing sequentially; and a reference signal generating unit that controls charging until a charged voltage charged by the variable current generated by the current generating unit reaches a first reference voltage level, starts discharging when the charged voltage reaches the first reference voltage level, controls discharging until the charged voltage reaches a second reference voltage level, and generates a triangular wave reference signal that has a frequency buffering interval in which a frequency sequentially changes when the initial driving completion signal or the protection signal is input.

Abstract translation: 为LCD背光源提供参考信号发生器和PWM控制电路。 参考信号发生器和用于LCD背光的PWM控制电路可以被配置为分别包括：电流控制单元，其控制顺序变化的可变电流的产生; 电流产生单元，其生成顺序变化的可变电流; 以及参考信号生成单元，其控制充电，直到由所述电流产生单元产生的可变电流充电的充电电压达到第一基准电压电平，当充电电压达到第一参考电压电平时开始放电，控制放电直到充电电压 达到第二参考电压电平，并且产生具有频率缓冲间隔的三角波参考信号，其中，当输入初始驱动完成信号或保护信号时，频率顺次改变。

公开(公告)号：US20110304272A1

公开(公告)日：2011-12-15

申请号：US13143907

申请日：2010-01-07

Applicant: Chong Ng ,  Paul Dalby ,  Jamie Kelly

Inventor： Chong Ng ,  Paul Dalby ,  Jamie Kelly

IPC: H05B37/02 ,  H05B41/36

CPC classification number: H05B41/285 ,  Y02B20/183

Abstract: The application relates to a circuit for operating a light-emitting means, having a half-bridge or full-bridge circuit for providing a supply voltage for the at least one light-emitting means, and a control circuit for the closed-loop control of the operation of the light-emitting means and/or fault identification. A measurement signal which represents the current through the bridge circuit and/or a measurement signal which represents the lamp current and a measurement signal which represents the voltage across the at least one light-emitting means are supplied to the control circuit at the same input.

Abstract translation: 本申请涉及一种用于操作发光装置的电路，具有用于提供至少一个发光装置的电源电压的半桥或全桥电路，以及用于闭环控制的控制电路 发光装置的操作和/或故障识别。 表示通过桥接电路的电流和/或表示灯电流的测量信号的测量信号和表示至少一个发光装置两端的电压的测量信号在相同的输入端被提供给控制电路。

公开(公告)号：US20110062884A1

公开(公告)日：2011-03-17

申请号：US12646151

申请日：2009-12-23

Applicant: Yu Jin JANG ,  Jeong In Cheon

Inventor： Yu Jin JANG ,  Jeong In Cheon

IPC: H05B37/02 ,  G05F3/02

CPC classification number: H05B41/285

Abstract: There are provided a reference signal generator and a PWM control circuit for LCD backlight. The reference signal generator and the PWM control circuit for LCD backlight may be configured to respectively include: a current control unit that controls generation of a variable current sequentially changing; a current generating unit that generates a variable current changing sequentially; and a reference signal generating unit that controls charging until a charged voltage charged by the variable current generated by the current generating unit reaches a first reference voltage level, starts discharging when the charged voltage reaches the first reference voltage level, controls discharging until the charged voltage reaches a second reference voltage level, and generates a triangular wave reference signal that has a frequency buffering interval in which a frequency sequentially changes when the initial driving completion signal or the protection signal is input.

Abstract translation: 为LCD背光源提供参考信号发生器和PWM控制电路。 参考信号发生器和用于LCD背光的PWM控制电路可以被配置为分别包括：电流控制单元，其控制顺序变化的可变电流的产生; 电流产生单元，其生成顺序变化的可变电流; 以及参考信号生成单元，其控制充电，直到由所述电流产生单元产生的可变电流充电的充电电压达到第一基准电压电平，当充电电压达到第一参考电压电平时开始放电，控制放电直到充电电压 达到第二参考电压电平，并且产生具有频率缓冲间隔的三角波参考信号，其中，当输入初始驱动完成信号或保护信号时，频率顺次改变。

公开(公告)号：US20080012503A1

公开(公告)日：2008-01-17

申请号：US11573900

申请日：2005-07-27

Applicant: Johannes Wessels ,  Arnold Buij ,  Geert Van Der Veen

Inventor： Johannes Wessels ,  Arnold Buij ,  Geert Van Der Veen

IPC: H05B41/285

CPC classification number: H05B41/285 ,  H05B41/282 ,  Y02B20/183

Abstract: A fluorescent lamp (2), in particular a backlight lamp of a display device, is supplied with an alternating voltage, a frequency and an amplitude of which being greater during ignition than during normal operation of the lamp. The voltage (V) across the lamp and the current (I) through the lamp are measured to provide a measured voltage value and a measured real lamp current value. From the alternating voltage there is derived a voltage (V2). The measured voltage value is multiplied by the sum of the measured real lamp current value and the derived voltage. The multiplication result (P=V*(I+V2)) is compared with a reference value (Ref), which results in a difference or error value. The error value is used to control the frequency and the amplitude of the alternating voltage (V), such that the error value is minimized.

Abstract translation: 荧光灯（2），特别是显示装置的背光灯被提供有在点火期间比在灯的正常操作期间更大的交流电压，频率和振幅。 测量灯上的电压（V）和通过灯的电流（I），以提供测量的电压值和测得的实际灯电流值。 从交流电压导出电压（V 2）。 测得的电压值乘以测得的实际灯电流值与导出电压之和。 将乘法结果（P = V *（I + V 2））与参考值（Ref）进行比较，这导致差值或误差值。 误差值用于控制交流电压（V）的频率和幅度，使得误差值最小化。

公开(公告)号：US20070029950A1

公开(公告)日：2007-02-08

申请号：US11354463

申请日：2006-02-15

Applicant: Hyeon-Yong Jang ,  Jong-Cheol Lee

Inventor： Hyeon-Yong Jang ,  Jong-Cheol Lee

IPC: H05B39/04

CPC classification number: H05B33/0854 ,  H05B33/0851 ,  H05B33/089 ,  H05B33/0896 ,  H05B41/282 ,  H05B41/285

Abstract: An LCD shuts down an inverter when a supply time of a high current from the inverter to a lamp exceeds an allowable time, and also controls the allowable time according to an ambient temperature, thereby minimizing damage to a lamp due to overheating in a high-brightness driving operation.

Abstract translation: 当从逆变器到灯的高电流的供给时间超过允许时间时，LCD关闭逆变器，并且还根据环境温度来控制允许的时间，从而最小化由于高温下的过热对灯的损坏， 亮度驾驶操作。

公开(公告)号：US20060044255A1

公开(公告)日：2006-03-02

申请号：US11117392

申请日：2005-04-29

Applicant: Kang Lee ,  Sin Park

Inventor： Kang Lee ,  Sin Park

IPC: G09G3/36

CPC classification number: H05B41/285 ,  Y02B20/183

Abstract: A method for driving backlight unit includes generating at least one pulse, after generating the at least one pulse, generating a driving signal having a constant state, supplying a predetermined capacitor voltage to a lamp assembly, wherein the predetermined capacitor voltage corresponds to the at least one pulse, and supplying a second voltage to the lamp assembly supplied with the predetermined capacitor voltage, wherein the second voltage corresponds to the driving signal and wherein the lamp assembly emits light in response to the supplied second voltage.

Abstract translation: 一种用于驱动背光单元的方法包括在产生至少一个脉冲之后产生至少一个脉冲，产生具有恒定状态的驱动信号，向灯组件提供预定电容器电压，其中预定电容器电压对应于至少 一个脉冲，并且向提供有预定电容器电压的灯组件提供第二电压，其中第二电压对应于驱动信号，并且其中灯组件响应于所提供的第二电压而发光。

公开(公告)号：US20020125835A1

公开(公告)日：2002-09-12

申请号：US10076146

申请日：2002-02-14

Inventor： Masayasu Ito ,  Hitoshi Takeda

IPC: H05B037/02

CPC classification number: H05B41/292 ,  H05B41/285 ,  Y02B20/183

Abstract: When alternately applying an output voltage of a DC-DC converting circuit 3 to one discharge lamp, an output voltage on a non-load side in outputs having positive and negative polarities which is not applied to the discharge lamp during the light-up of the discharge lamp is restricted to be equal to an output voltage on a side which is applied to the discharge lamp. Moreover, when supplying a power to two discharge lamps while alternately switching a polarity of an output voltage through the DC-DC converting circuit 3, an output voltage on a non-load side in the outputs having positive and negative polarities which is not applied to the discharge lamp is restricted to be equal to the output voltage on the side which is applied to the discharge lamp if one of the discharge lamps is lighted up or an instruction for light-up is given and the other discharge lamp is lighted out or an instruction for light-out is given.

Abstract translation: 当将DC-DC转换电路3的输出电压交替地施加到一个放电灯时，在非负载侧的输出中的正极性和负极性的输出电压在亮灯期间不施加到放电灯 放电灯被限制为等于施加到放电灯的一侧的输出电压。 此外，当通过DC-DC转换电路3交替地切换输出电压的极性时，当向两个放电灯供电时，输出中的非负载侧的输出电压具有正极性和负极性，不适用于 放电灯被限制为等于放电灯的一侧上的输出电压，如果放电灯中的一个点亮或者点亮指示，另一个放电灯点亮，或 给出了指示灯。

公开(公告)号：US6108220A

公开(公告)日：2000-08-22

申请号：US27378

申请日：1998-02-20

Applicant: Raymond C. Franke

Inventor： Raymond C. Franke

IPC: H02M5/458 ,  H05B41/285

CPC classification number: H05B41/2856 ,  H02M5/458 ,  H05B41/285

Abstract: The vital driver utilizes rectification and subsequent synchronized inverting of the rectified power, which is then fed to a transformer. Failed operation, which permits current having a DC component to reach the load transformer, causes an increase in the current which is sensed by a current sensor. The high current can be detected by a fuse. Some embodiments use primary modules having a rectifier section with sufficient power to run a number of secondary units, each powering an individual load. The synchronizing inverter can utilize optically coupled solid state switches.

Abstract translation: 重要的驱动器使用整流和随后的整流功率的同步反相，然后将其馈送到变压器。 允许具有DC分量的电流到达负载变压器的故障操作导致由电流传感器感测的电流的增加。 高电流可以通过保险丝检测。 一些实施例使用具有足够功率的整流器部分的主模块来运行多个次级单元，每个次级单元为单独的负载供电。 同步反相器可以利用光耦合固态开关。

公开(公告)号：US5998937A

公开(公告)日：1999-12-07

申请号：US23783

申请日：1998-02-13

Applicant: Eitaro Nishigaki

Inventor： Eitaro Nishigaki

IPC: H05B41/392 ,  H02M3/24 ,  H02M7/48 ,  H02M11/00 ,  H05B41/24 ,  H05B41/285 ,  H05B37/02

CPC classification number: H05B41/285 ,  H05B41/245 ,  Y02B20/186

Abstract: A piezoelectric transformer drives a cold cathode tube under the control of a light controller; when the cold cathode tube is radiating in a small luminous intensity range, the light controller changes the duty factor of a driving signal supplied to the piezoelectric transformer so as to adjust the cold cathode tube at a target luminous intensity, and prevents the cold cathode tube from undesirable luminous gradient; when the cold cathode tube is radiating in a large luminous intensity range, the light controller changes the frequency of the driving signal so as to adjust the cold cathode tube to a target luminous intensity, and prevents a power supply unit from undesirable frequent load variation.

Abstract translation: 压电变压器在光控制器的控制下驱动冷阴极管; 当冷阴极管在小的发光强度范围内照射时，光控制器改变提供给压电变压器的驱动信号的占空因数，以将冷阴极管调节到目标发光强度，并防止冷阴极管 来自不良发光梯度; 当冷阴极管在大的发光强度范围内辐射时，光控制器改变驱动信号的频率，以将冷阴极管调节到目标发光强度，并且防止电源单元不期望的频繁的负载变化。