公开(公告)号：US20130322059A1

公开(公告)日：2013-12-05

申请号：US13521712

申请日：2012-06-11

申请人： Xinming Gao ,  Fei Li ,  Xiang Yang

发明人： Xinming Gao ,  Fei Li ,  Xiang Yang

IPC分类号： G09F13/04 ,  F21L4/02

CPC分类号： G09F13/04 ,  G02F1/133603 ,  H05B33/0827

摘要： The present invention provides an LED backlight system and display device. Backlight system includes power source module, LED array, master switch module, current detection module, current equalizer module and current shunt module. LED array is connected to power source module and includes LED strings with common anode. Master switch module includes first switch transistors for receiving switch control PWM signal of LED strings. Current detection module outputs current feedback signals corresponding to currents of LED strings. Current equalizer module is connected to current detection and includes equalizer control unit and equalizer switch unit. Based on current feedback signal, equalizer control unit controls on-and-off of equalizer switch unit. Current shunt module is connected in parallel with current equalizer module and performs current shunt on current equalizer module. As such, the present invention reduces energy-consumption of current equalizer module and temperature of LED drive chip.

摘要翻译： 本发明提供一种LED背光系统和显示装置。 背光系统包括电源模块，LED阵列，主开关模块，电流检测模块，电流均衡模块和电流分流模块。 LED阵列连接到电源模块，并包括带有阳极的LED串。 主开关模块包括用于接收LED串的开关控制PWM信号的第一开关晶体管。 电流检测模块输出与LED串电流相对应的电流反馈信号。 电流均衡器模块连接到电流检测，包括均衡器控制单元和均衡器开关单元。 基于电流反馈信号，均衡器控制单元控制均衡器开关单元的导通和关断。 电流分流模块与电流均衡器模块并联连接，并对电流均衡模块进行电流分流。 因此，本发明降低了电流均衡器模块的能量消耗和LED驱动芯片的温度。

公开(公告)号：US08704449B2

公开(公告)日：2014-04-22

申请号：US13519151

申请日：2012-05-16

申请人： Xiang Yang ,  Xinming Gao ,  Fei Li

发明人： Xiang Yang ,  Xinming Gao ,  Fei Li

IPC分类号： H05B37/02

CPC分类号： H05B33/086

摘要： The invention discloses an LED backlight driving circuit, an LCD device and a driving circuit. The LED backlight driving circuit includes a power supply module, an LED lightbar coupled with an output terminal of the power supply module, a dimming module coupled with the output terminal of the LED lightbar, and the LED backlight driving circuit further includes a transfer switch. A first input terminal of the transfer switch is coupled to the output terminal of the LED lightbar, and a second input terminal of the transfer switch is coupled to a feedback voltage. The output terminal of the transfer switch is coupled to the power supply module. The transfer switch is switched to the first input terminal when the dimming module is ON, and the transfer switch is switched to the second input terminal when the dimming module is OFF. Therefore, the LEDs of the invention can operate normally within the short dimming cycle. The invention only adds one transfer switch, the circuit is simple and does not increase the circuit area, and the cost is low.

摘要翻译： 本发明公开了一种LED背光驱动电路，LCD装置和驱动电路。 LED背光驱动电路包括电源模块，与电源模块的输出端子连接的LED灯条，与LED灯条的输出端子连接的调光模块，LED背光驱动电路还包括转换开关。 转移开关的第一输入端耦合到LED灯条的输出端，转换开关的第二输入端耦合到反馈电压。 转换开关的输出端子耦合到电源模块。 当调光模块为ON时，转换开关切换到第一输入端子，当调光模块关闭时，转换开关切换到第二输入端子。 因此，本发明的LED可以在短的调光周期内正常工作。 本发明仅增加一个转换开关，电路简单，不增加电路面积，成本低。

公开(公告)号：US20130285571A1

公开(公告)日：2013-10-31

申请号：US13515284

申请日：2012-04-28

申请人： Fei Li ,  Xinming Gao ,  Xiang Yang

发明人： Fei Li ,  Xinming Gao ,  Xiang Yang

IPC分类号： H05B37/02 ,  H05B37/00

CPC分类号： H05B33/0827 ,  H05B33/0821

摘要： The invention provides an LED backlight drive circuit, an LCD device and a driving method. The LED backlight drive circuit comprises a plurality of LED lightbars which are arranged in parallel connection, and a detection module; a comparison unit is arranged in said detection module, the comparison ends of the comparison unit are respectively coupled to the output ends of the LED lightbars, and the reference end thereof is coupled with an adjustable reference voltage module. In the invention, because the comparison unit is used, and the reference end of the comparison unit is coupled to an adjustable reference voltage module, different reference voltages are selected in accordance with different output end voltages of the LED lightbars of the LCD device. If the voltage difference between the output end voltage of the LED lightbar and the reference voltage is controlled within a reasonable range, the comparison accuracy can be effectively improved. The maximum voltage difference of the LED lightbar is fed back to the power source end of the drive circuit to regulate the output of the power source.

摘要翻译： 本发明提供一种LED背光驱动电路，LCD装置及驱动方法。 LED背光驱动电路包括并列配置的多个LED灯条和检测模块; 比较单元布置在所述检测模块中，比较单元的比较端分别耦合到LED光条的输出端，并且其参考端与可调参考电压模块耦合。 在本发明中，由于使用比较单元，并且比较单元的参考端耦合到可调参考电压模块，所以根据LCD装置的LED光条的不同输出端电压来选择不同的参考电压。 如果将LED灯条的输出端电压与参考电压之间的电压差控制在合理的范围内，则可以有效提高比较精度。 LED灯条的最大电压差被反馈到驱动电路的电源端，以调节电源的输出。

公开(公告)号：US08994639B2

公开(公告)日：2015-03-31

申请号：US13518429

申请日：2012-05-21

申请人： Xinming Gao ,  Xiang Yang ,  Fei Li

发明人： Xinming Gao ,  Xiang Yang ,  Fei Li

IPC分类号： G09G3/36 ,  G09G3/34 ,  H05B33/08

CPC分类号： G09G3/3406 ,  G09G2320/0606 ,  G09G2320/0633 ,  G09G2330/00 ,  H05B33/0812 ,  H05B33/0815 ,  Y02B20/343

摘要： The invention provides an LED backlight driving circuit, a backlight module, and an LCD device. The LED backlight driving circuit includes an LED light string; an input end of the LED light string is directly connected with an input end of a power source, and an output end of the LED light string is coupled with a buck module. In the invention, because the output end of the LED light string is in series connected with the buck module, the LED light string is connected in series between an input voltage and an output voltage, and a part of LEDs are directly supplied by the input voltage without the first stage conversion. Thus, the energy supplied by the buck module is reduced, the conversion efficiency is improved, the energy efficiency is increased, the requirement of the buck module to withstand voltage is reduced, and the device standard is decreased, thereby favoring cost reduction.

摘要翻译： 本发明提供一种LED背光驱动电路，背光模块和LCD装置。 LED背光驱动电路包括LED灯串; LED灯串的输入端与电源的输入端直接连接，LED灯串的输出端与降压模块连接。 在本发明中，由于LED灯串的输出端与降压模块串联连接，所以LED灯串串联连接在输入电压与输出电压之间，一部分LED由输入端直接供电 电压无第一级转换。 因此，由降压模块提供的能量降低，转换效率提高，能量效率提高，降压模块承受电压的要求降低，器件标准降低，有利于降低成本。

公开(公告)号：US20150069927A1

公开(公告)日：2015-03-12

申请号：US13522962

申请日：2012-05-25

申请人： Fei Li ,  Xinming Gao ,  Xiang Yang

发明人： Fei Li ,  Xinming Gao ,  Xiang Yang

IPC分类号： H05B37/02 ,  G09G3/34

CPC分类号： H05B37/0209 ,  G09G3/3406 ,  G09G2320/0247 ,  G09G2320/0653 ,  G09G2330/026 ,  G09G2330/027 ,  H05B33/0815 ,  H05B33/0824 ,  Y02B20/346

摘要： The present invention discloses an LCD backlight module, which includes a backlight source and a backlight source control device, the backlight source control device comprising: a first switch; a boost module; a control module, utilized to control the first switch, so that the backlight source is switched on off under the control of the control module, and utilized to control the boost module, so that the boost module keeps outputting the voltage after the backlight source is turned off by the first switch.

摘要翻译： 本发明公开了一种包括背光源和背光源控制装置的LCD背光模块，所述背光源控制装置包括：第一开关; 升压模块; 控制模块，用于控制第一开关，使得背光源在控制模块的控制下被接通，并用于控制升压模块，使得升压模块在背光源之后保持输出电压 由第一个开关关闭。

公开(公告)号：US20140016304A1

公开(公告)日：2014-01-16

申请号：US13582420

申请日：2012-07-16

申请人： Xinming Gao ,  Fei Li ,  Xiang Yang

发明人： Xinming Gao ,  Fei Li ,  Xiang Yang

IPC分类号： G09F13/04

CPC分类号： H05B33/0803 ,  G09G3/003 ,  G09G3/342 ,  G09G2300/0426 ,  G09G2320/0209 ,  G09G2320/064 ,  H05B33/0815

摘要： A backlight driving circuit includes a plurality of display areas, and each display area includes a first LED light cluster and a second LED light cluster which are symmetrical. The first LED light cluster and the second LED light cluster are connected in series to form a plurality of LED lightbars connected in parallel connection at two ends of the power source of the backlight driving circuit. Because the LED light clusters of the same display area are connected in series namely more than two small lightbars are connected in series to form a large LED lightbar, the small lightbars only occupy one pin of the constant current circuit. The LEDs on both sides of the same display area of the 3D display device can be simultaneously turned on or simultaneously turned off, and can be completely connected in series for use.

摘要翻译： 背光驱动电路包括多个显示区域，并且每个显示区域包括对称的第一LED光群和第二LED光群。 第一LED灯组和第二LED灯组串联连接，形成在背光驱动电路的电源的两端并联连接的多个LED灯条。 因为相同显示区域的LED灯串串联连接，即两个以上的小灯串串联连接，形成一个大的LED灯条，小灯只占用恒流电路的一个引脚。 可以同时打开或同时关闭3D显示装置的同一显示区域的两侧的LED，并且可以串联地完全连接使用。

公开(公告)号：US20140009455A1

公开(公告)日：2014-01-09

申请号：US13583928

申请日：2012-07-09

申请人： Fei Li ,  Xinming Gao ,  Xiang Yang

发明人： Fei Li ,  Xinming Gao ,  Xiang Yang

IPC分类号： G09G3/36 ,  G06F3/038

CPC分类号： G09G3/3406 ,  G09G2320/041 ,  G09G2320/064 ,  G09G2330/08 ,  H05B33/0827

摘要： The present disclosure discloses a light emitting diode (LED) backlight driving circuit, a backlight module, and a liquid crystal display (LCD) device. The LED backlight driving circuit includes an LED lightbars. An output end of the LED lightbar is connected with a control integrated circuit (IC) in series, and is also connected with a shunt controllable switch. The shunt controllable switch is switched on when a voltage of the output end of the LED lightbar exceeds a preset value and is switched off when the voltage is less than the preset value. In the present disclosure, because a shunt controllable switch is connected in parallel in the control IC, when the LED lightbars are short-circuited, the shunt controllable switch is switched on, a part of current flows towards the shunt controllable switch, and the burden of the control IC is alleviated. Thus, the temperature of the control IC is reduced.

摘要翻译： 本公开公开了一种发光二极管（LED）背光驱动电路，背光模块和液晶显示器（LCD）装置。 LED背光驱动电路包括LED灯条。 LED灯条的输出端与控制集成电路（IC）串联连接，并与分流可控开关连接。 当LED灯条的输出端的电压超过预设值时，并联可控开关接通，当电压小于预设值时，分流可控开关被断开。 在本公开中，由于并联可控开关在控制IC中并联连接，所以当LED光条短路时，分流可控开关接通，部分电流流向分流可控开关，负载 的控制IC得到缓解。 因此，控制IC的温度降低。

公开(公告)号：US09426862B2

公开(公告)日：2016-08-23

申请号：US13512745

申请日：2012-04-25

申请人： Xiang Yang ,  Xinming Gao ,  Fei Li

发明人： Xiang Yang ,  Xinming Gao ,  Fei Li

IPC分类号： H05B33/08 ,  G09G3/34

CPC分类号： H05B33/089 ,  G09G3/3406 ,  G09G2320/064

摘要： The invention discloses an LED backlight drive circuit, an LCD device and a driving method. The LED backlight drive circuit includes a power source; an output capacitor and an LED lightbar which is connected in series with a first controllable switch are in parallel connection, and then are arranged between the output terminal and the ground terminal of the power source. The LED backlight drive circuit further includes a first comparator; a cathode of the first comparator is connected to a first reference voltage, an anode of the first comparator is coupled with the output terminal of the power source, and the output terminal of the first comparator is coupled with a control end of the first controllable switch; when the anode voltage of the first comparator exceeds the cathode voltage, the output terminal of the first comparator drives the first controllable switch to be conducted. In the invention, the LED lightbar only can be conducted at the predetermined voltage. Thus, the LED will be unable to be lighted even if the electric quantity is stored in the output capacitor; only when the output voltage achieves the predetermined voltage in the complete ON operation, the first controllable switch is able to be conducted, which solves the problem of LED blinking in the ON operation.

摘要翻译： 本发明公开了一种LED背光驱动电路，LCD装置及驱动方法。 LED背光驱动电路包括电源; 与第一可控开关串联连接的输出电容器和LED灯条并联连接，然后设置在电源的输出端子和接地端子之间。 LED背光驱动电路还包括第一比较器; 第一比较器的阴极连接到第一参考电压，第一比较器的阳极与电源的输出端耦合，第一比较器的输出端与第一可控开关的控制端耦合 ; 当第一比较器的阳极电压超过阴极电压时，第一比较器的输出端驱动第一可控开关导通。 在本发明中，LED灯条只能在预定电压下进行。 因此，即使电量存储在输出电容器中，LED也不能点亮; 只有当输出电压在整个ON操作中达到预定电压时，才能进行第一个可控开关，从而解决了ON操作中LED闪烁的问题。

公开(公告)号：US09072129B2

公开(公告)日：2015-06-30

申请号：US13522962

申请日：2012-05-25

申请人： Fei Li ,  Xinming Gao ,  Xiang Yang

发明人： Fei Li ,  Xinming Gao ,  Xiang Yang

IPC分类号： H05B33/08 ,  H05B37/02 ,  G09G3/34

CPC分类号： H05B37/0209 ,  G09G3/3406 ,  G09G2320/0247 ,  G09G2320/0653 ,  G09G2330/026 ,  G09G2330/027 ,  H05B33/0815 ,  H05B33/0824 ,  Y02B20/346

摘要： The present invention discloses an LCD backlight module, which includes a backlight source and a backlight source control device, the backlight source control device comprising: a first switch; a boost module; a control module, utilized to control the first switch, so that the backlight source is switched on off under the control of the control module, and utilized to control the boost module, so that the boost module keeps outputting the voltage after the backlight source is turned off by the first switch.

摘要翻译： 本发明公开了一种包括背光源和背光源控制装置的LCD背光模块，所述背光源控制装置包括：第一开关; 升压模块; 控制模块，用于控制第一开关，使得背光源在控制模块的控制下被接通，并用于控制升压模块，使得升压模块在背光源之后保持输出电压 由第一个开关关闭。

公开(公告)号：US08911111B2

公开(公告)日：2014-12-16

申请号：US13521712

申请日：2012-06-11

申请人： Xinming Gao ,  Fei Li ,  Xiang Yang

发明人： Xinming Gao ,  Fei Li ,  Xiang Yang

IPC分类号： H05B37/04 ,  H05B37/00

CPC分类号： G09F13/04 ,  G02F1/133603 ,  H05B33/0827

摘要： The present invention provides an LED backlight system and display device. Backlight system includes power source module, LED array, master switch module, current detection module, current equalizer module and current shunt module. LED array is connected to power source module and includes LED strings with common anode. Master switch module includes first switch transistors for receiving switch control PWM signal of LED strings. Current detection module outputs current feedback signals corresponding to currents of LED strings. Current equalizer module is connected to current detection and includes equalizer control unit and equalizer switch unit. Based on current feedback signal, equalizer control unit controls on-and-off of equalizer switch unit. Current shunt module is connected in parallel with current equalizer module and performs current shunt on current equalizer module. As such, the present invention reduces energy-consumption of current equalizer module and temperature of LED drive chip.

摘要翻译： 本发明提供一种LED背光系统和显示装置。 背光系统包括电源模块，LED阵列，主开关模块，电流检测模块，电流均衡模块和电流分流模块。 LED阵列连接到电源模块，并包括带有阳极的LED串。 主开关模块包括用于接收LED串的开关控制PWM信号的第一开关晶体管。 电流检测模块输出与LED串电流相对应的电流反馈信号。 电流均衡器模块连接到电流检测，包括均衡器控制单元和均衡器开关单元。 基于电流反馈信号，均衡器控制单元控制均衡器开关单元的导通和关断。 电流分流模块与电流均衡器模块并联连接，并对电流均衡模块进行电流分流。 因此，本发明降低了电流均衡器模块的能量消耗和LED驱动芯片的温度。