WO2014008672A1 - 一种led背光驱动电路、背光模组和液晶显示装置 - Google Patents

一种led背光驱动电路、背光模组和液晶显示装置 Download PDF

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Publication number
WO2014008672A1
WO2014008672A1 PCT/CN2012/078710 CN2012078710W WO2014008672A1 WO 2014008672 A1 WO2014008672 A1 WO 2014008672A1 CN 2012078710 W CN2012078710 W CN 2012078710W WO 2014008672 A1 WO2014008672 A1 WO 2014008672A1
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Prior art keywords
connector
led
led lamp
lamp group
coupled
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PCT/CN2012/078710
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English (en)
French (fr)
Inventor
高新明
黎飞
杨翔
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深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US13/582,420 priority Critical patent/US20140016304A1/en
Publication of WO2014008672A1 publication Critical patent/WO2014008672A1/zh

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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light-emitting diodes [LED]

Definitions

  • the present invention relates to the field of liquid crystal display, and more particularly to an LED backlight driving circuit, a backlight module, and a liquid crystal display device.
  • Boost boost circuit
  • the inductor L1 stores energy
  • Q1 is turned off
  • the L1 reversely releases energy, so that the output voltage is higher than the input.
  • the voltage is then used by the constant current module to make the current flowing through the LED string constant:
  • the impedance of the MOS transistor Q2 is controlled such that the voltage across the resistor R1 is equal to the reference voltage Vref to achieve constant current.
  • a backlight module for partition scanning is often used.
  • Partition scanning requires a symmetrical LED strip, as shown in Figure 2, for the partitioning of the backlight module in the 8-zone LED strip.
  • the LED strip is divided into 16 zones, so that the constant current module needs 16 channels for constant current, resulting in an increase in the cost of the constant current module. 2D models can sometimes use this backlight-driven solution to reduce some of the power consumption.
  • the technical problem to be solved by the present invention is to provide an LED backlight driving circuit, a backlight module and a liquid crystal display device which can reduce the cost of the constant current module.
  • An LED backlight driving circuit includes a plurality of display areas, each display area includes at least two sets of LED light groups, and at least two sets of LED light sets in each display area are arranged in series; forming a plurality of LEDs connected in parallel at both ends of the driving circuit power supply Light.
  • each of the display areas includes a first LED light group and a second LED light group
  • the LED backlight driving circuit further includes a connector, between the first LED light group and the second LED light group, and The first LED light group, the second LED light group, and the power source are coupled by a connector.
  • the connector Through the connector, on the one hand It is convenient to carry out the series connection between different LED light groups.
  • each LED light group can be used as a separate general-purpose piece, and can be applied to the present invention as well as to existing conventional models.
  • the connector comprises a positive connector, a negative connector, a first connector and a second connector, the first LED lamp set input and output terminals are coupled to the first connector; the second LED Both the lamp set input and output are coupled to the second connector; the positive terminal of the power supply is coupled to the positive connector; the negative terminal of the power supply is coupled to the negative connector.
  • This is a specific type of connector, and each part is docked with a connector for further assembly.
  • the output end of the first LED lamp set is coupled to the input end of the second LED lamp set through the first connector, the positive connector, the negative connector and the second connector.
  • each of the two lamp groups is separately connected to one connector, and the series connection is realized by the positive connector and the negative connector of the power terminal, so that each LED lamp group is independent, and the fault is directly pulled out in case of failure.
  • the connector can be replaced without affecting other LED groups.
  • the output of the first LED lamp set is coupled to the input of the second LED lamp set through the first connector and the second connector.
  • This is a tandem structure between another LED light group.
  • the input end of the LED light bar is coupled with a boosting circuit, and the output end is coupled with a step-down circuit.
  • the load of the LED strips of each branch increases, and the driving capability of the power supply has higher requirements.
  • the boosting circuit and the step-down circuit the two ends of the LED strip can be increased.
  • the differential pressure improves the drive capability of the circuit.
  • the LED backlight driving circuit comprises a converter module circuit board coupled to an output end of each LED lamp group, and an output end of the first LED lamp group and an input end of the second LED lamp group pass through the converter module The board is electrically connected.
  • a backlight module includes the above LED backlight driving circuit.
  • a 3D liquid crystal display device includes the above backlight module.
  • the first LED light group and the second LED light group are respectively located on left and right sides of the liquid crystal display device.
  • the first LED light group and the second LED light group are respectively located on the liquid crystal display device Upper and lower ends. This is another specific lamp group distribution structure.
  • the LED light groups of the same display area are used in series, two or more small light bars are connected in series to form a large LED light bar, so that the original plurality of small light bars only need to occupy one channel of the constant current module.
  • the number of channels of the constant current module can be reduced by more than half, which reduces the cost of the constant current module. It is especially suitable for the LED symmetrically distributed 3D display device.
  • the LEDs on both sides of the same display area are simultaneously bright and simultaneously extinguished, and can be used in series to save constant
  • the channel of the flow module is of course fully applicable to 2D liquid crystal display devices with backlight control.
  • 1 is a conventional LED driving circuit
  • FIG. 2 is a schematic diagram of driving of a conventional 3D driving circuit LED lamp group
  • FIG. 3 is a schematic view showing a series connection of LED lamp groups according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a driving circuit with a step-down circuit according to an embodiment of the present invention.
  • 110 a first LED light group
  • 120 a second LED light group
  • 210 a positive electrode connector
  • 220 a negative electrode connector
  • 230 a first connector
  • 240 a second connector
  • the invention discloses a 3D liquid crystal display device, which comprises a liquid crystal panel and a backlight module, and the backlight module comprises an LED backlight driving circuit.
  • the LED backlight driving circuit comprises a plurality of display areas, each display area comprising at least two sets of LED lamp sets arranged in series to form a plurality of LED strips connected in parallel at the two ends of the driving circuit power supply.
  • the LED light groups of the same display area are used in series, two or more small light bars are connected in series to form a large LED light bar, so that the original plurality of small light bars only need to occupy one channel of the constant current module.
  • the number of channels of the constant current module can be reduced by more than half, which reduces the cost of the constant current module. It is especially suitable for the LED symmetrically distributed 3D display device.
  • the LEDs on both sides of the same display area are simultaneously bright and simultaneously extinguished, and can be used in series to save constant
  • the channel of the flow module of course, for backlight control
  • the 2D liquid crystal display device is also fully applicable.
  • each display area includes a first LED light group 110 and a second LED light group 120, and the first LED light group 110 and the second LED light group 120 can be divided into left and right sides of the liquid crystal display device. Side or upper and lower ends are symmetrically distributed.
  • the LED backlight drive circuit further includes a connector between the first LED light group 110 and the second LED light group, the first LED light group 110, the second LED light group, and the power source coupled by a connector.
  • the connector includes a positive connector 210, a negative connector 220, a first connector 230, and a second connector 240, the first LED lamp set 110 input and output terminals are coupled to the first connector 230; the second LED light group input Both the output and the output are coupled to the second connector 240; the positive terminal of the power supply is coupled to the positive connector 210; the negative terminal of the power supply is coupled to the negative connector 220.
  • the output of the first LED light set 110 is coupled to the input of the second LED light set through a first connector 230, a positive connector 210, a negative connector 220, and a second connector 240.
  • each LED light group can be used as a separate universal part, which can be applied to the present invention as well as existing ones. Regular models.
  • the parts where each part is butted are connected by connectors, which is further convenient for assembly.
  • the two lamp groups are respectively connected to one connector, and the series is realized by the positive connector 210 and the negative connector 220 of the power terminal, so that each LED lamp group is independent, and the corresponding lamp is directly unplugged correspondingly.
  • the connector can be replaced without affecting other LED groups.
  • the output of the first LED lamp set 110 can also be coupled to the input of the second LED lamp set via the first connector 230 and the second connector 240, i.e., in series at the LED lamp set.
  • the LED backlight driving circuit includes a converter module circuit board coupled to the output end of each LED lamp group. Therefore, the output end of the first LED lamp group 110 and the input end of the second LED lamp group can be in the converter module circuit.
  • the plates are connected in series by soldering.
  • the boosting circuit can be coupled at the input end of the LED light bar, and the output end coupling is lowered. Pressure circuit. By the cooperation of the boosting circuit and the step-down circuit, the differential pressure across the LED strip can be increased. Improve the drive capability of the circuit.
  • the input terminals of the booster circuit and the buck circuit are connected to the VBL, and D104, D105, D106, and D107 are connected in series to form an LED strip.
  • the boosting circuit includes a first energy storage inductor L103, a first diode D102, one end of the first energy storage inductor L103 is connected to the power source VBL, and the other end is connected to the negative pole of the first diode D102, the first diode
  • the anode of D102 is connected to the anode of the LED strip; between the cathode of the first diode D102 and the ground of the power source, a first controllable switch Q109 is connected in series; between the anode of the first diode D102 and the ground of the power source
  • the first storage capacitor CP3 is connected in series.
  • the step-down circuit comprises a second controllable switch Q110 for storing energy, a second diode D103, one end of the second controllable switch D103 is connected to the power source VBL, and the other end is connected to the anode of the second diode D103, the second diode
  • the negative electrode of D103 is connected to the negative pole of the LED light bar
  • the second storage capacitor CP4 is connected in series between the negative pole of the second diode D103 and the ground of the power supply
  • the positive pole of the second diode D103 is connected to the ground of the power supply
  • the control terminals of the first controllable switch and the second controllable switch are electrically connected, so that the same control signal can be used to control and control the control circuit.
  • the circuit drives the LED light bar by using two different topological structures, one is a boosting topology composed of a first energy storage inductor L103, a first diode D102, and a first controllable switch Q109 ( BOOST), which causes the power supply VBL to be boosted to a certain high voltage to drive the positive pole of the LED light bar, and the other is the second energy storage inductor L104, the second diode D103, and the second controllable switch Q110.
  • BOOST first controllable switch Q109
  • PUCK-BOOST which causes the power supply VBL to be stepped down to a certain negative voltage to drive the negative pole of the LED strip, thus breaking the limit of the maximum voltage that a single boost circuit can provide, increasing the ends of the LED strip.
  • the pressure difference can fully meet the driving requirements of the LED strip after the series connection.

Abstract

公开了一种LED背光驱动电路、背光模组和液晶显示装置。所述LED背光驱动电路包括多个显示区,每个显示区包括两组对称的第一LED灯组(110)和第二LED灯组(120),所述第一LED灯组(110)和第二LED灯组(120)串联设置,形成多条并联在驱动电路电源两端的LED灯条。由于将同一显示区的LED灯组串联使用,即将两个以上的小灯条串联,形成一条大的LED灯条,这样原来的多个小灯条只需要占用恒流模块的一个通道,恒流模块的通道数量可以缩减一半以上,降低了恒流模块的成本,对于LED对称分布3D显示装置尤其适用,同一显示区两边的LED是同时亮也同时灭,完全可以串联起来使用,节省恒流模块的通道,当然对于有背光控制的2D液晶显示装置也完全适用。

Description

一种 LED背光驱动电路、 背光模组和液晶显示装置
【技术领域】
本发明涉及液晶显示领域, 更具体的说, 涉及一种 LED背光驱动电路、 背 光模组和液晶显示装置。
【背景技术】
如图 1所示, 在背光驱动电路中, 常采用升压电路(Boost )架构, 在 M0S 管 Q1导通时电感 L1存储能量, Q1关断时 L1反向释放能量, 使输出电压高于 输入电压, 然后再利用恒流模块使流过 LED灯串的电流恒定: 控制 MOS管 Q2 的阻抗使电阻 R1上的电压与基准电压 Vref相等来实现恒流。 当是 3D机种时, 为了降低串扰(crosstalk ), 常采用分区扫描的背光模组。 分区扫描需要对称的 LED灯条, 如图 2所示的分区扫描的背光模组分 8区时 LED 灯条的连接方式。 这样 LED灯条被分了 16区, 这样恒流模块就需要 16个通道进行恒流, 导致恒 流模块的成本上升。 2D机种有时也可采用此背光驱动的方案, 可以降低一部分 功耗。
【发明内容】
本发明所要解决的技术问题是提供一种可降低恒流模块成本的 LED背光驱 动电路、 背光模组和液晶显示装置。
本发明的目的是通过以下技术方案来实现的:
一种 LED背光驱动电路, 包括多个显示区, 每个显示区包括至少两组 LED 灯组, 每个显示区中至少两组 LED灯组串联设置; 形成多条并联在驱动电路电 源两端的 LED灯条。
优选的, 所述每个显示区包括第一 LED灯组和第二 LED灯组, 所述 LED 背光驱动电路还包括连接器,所述第一 LED灯组和第二 LED灯组之间, 以及第 一 LED灯组、 第二 LED灯组和电源之间通过连接器耦合。 通过连接器, 一方面 可以方便进行不同 LED灯组之间的串连, 另一方面,每个 LED灯组可以作为单 独的通用件使用, 既可应用于本发明, 也能应用于现有的常规机种。
优选的, 所述连接器包括正极连接器、 负极连接器、 第一连接器和第二连 接器,所述第一 LED灯组输入和输出端都耦合到第一连接器; 所述第二 LED灯 组输入和输出端都耦合到第二连接器; 所述电源的正极耦合到正极连接器; 所 述电源的负极耦合到负极连接器。 此为具体的连接器种类, 每个部件对接的部 位都用连接器来连接, 进一步方便装配。
优选的, 所述第一 LED灯组的输出端通过第一连接器、 正极连接器、 负极 连接器和第二连接器耦合到第二 LED灯组的输入端。 此技术方案中, 两个各灯 组各自单独连接一个连接器, 其串联通过电源端的正极连接器和负极连接器来 实现, 这样每个 LED灯组都是独立的, 一旦出现故障直接拔下相应的连接器既 可更换, 不影响其他 LED灯组。
优选的, 所述第一 LED灯组的输出端通过第一连接器和第二连接器耦合到 第二 LED灯组的输入端。 此为另一种 LED灯组之间的串接结构。
优选的,所述 LED灯条输入端耦合有升压电路,其输出端耦合有降压电路。 两个 LED灯组串联以后,每条支路的 LED灯条的负载增大,对电源的驱动能力 有更高要求,通过升压电路和降压电路的配合,可以增大 LED灯条两端的压差, 提高了电路的驱动能力。
优选的,所述 LED背光驱动电路包括耦合到每个 LED灯组输出端的变流模 块电路板,所述第一 LED灯组的输出端和第二 LED灯组的输入端通过所述变流 模块电路板电连接。
一种背光模组, 包括上述的一种 LED背光驱动电路。
一种 3D液晶显示装置, 包括上述的一种背光模组。
优选的,所述第一 LED灯组和第二 LED灯组分别位于所述液晶显示装置的 左右两侧。 此为具体的灯组分布结构。
优选的,所述第一 LED灯组和第二 LED灯组分别位于所述液晶显示装置的 上下两端。 此为另一种具体的灯组分布结构。
本发明由于将同一显示区的 LED灯组串联使用, 即将两个以上的小灯条串 联, 形成一条大的 LED灯条, 这样原来的多个小灯条只需要占用恒流模块的一 个通道, 恒流模块的通道数量可以缩减一半以上, 降低了恒流模块的成本, 对 于 LED对称分布 3D显示装置尤其适用, 同一显示区两边的 LED是同时亮也同 时灭, 完全可以串联起来使用, 节省恒流模块的通道, 当然对于有背光控制的 2D液晶显示装置也完全适用。
【附图说明】
图 1是现有的一种 LED驱动电路;
图 2是现有 3D驱动电路 LED灯组驱动示意图;
图 3是本发明实施例 LED灯组串联示意图;
图 4是本发明实施例带降压电路的驱动电路示意图;
其中: 110、 第一 LED灯组; 120、 第二 LED灯组; 210、 正极连接器; 220、 负极连接器; 230、 第一连接器; 240、 第二连接器。
【具体实施方式】
本发明公开一种 3D液晶显示装置, 包括液晶面板和背光模组, 背光模组包 括一种 LED背光驱动电路。所述 LED背光驱动电路包括多个显示区,每个显示 区包括至少两组 LED灯组串联设置,形成多条并联在驱动电路电源两端的 LED 灯条。
本发明由于将同一显示区的 LED灯组串联使用, 即将两个以上的小灯条串 联, 形成一条大的 LED灯条, 这样原来的多个小灯条只需要占用恒流模块的一 个通道, 恒流模块的通道数量可以缩减一半以上, 降低了恒流模块的成本, 对 于 LED对称分布 3D显示装置尤其适用, 同一显示区两边的 LED是同时亮也同 时灭, 完全可以串联起来使用, 节省恒流模块的通道, 当然对于有背光控制的 2D液晶显示装置也完全适用。
下面结合附图和较佳的实施例对本发明作进一步说明。
如图 3所示, 每个显示区包括第一 LED灯组 110和第二 LED灯组 120, 所 述第一 LED灯组 110和第二 LED灯组 120可以分列子在液晶显示装置的左右两 侧或上下两端, 呈对称分布。 LED背光驱动电路还包括连接器, 第一 LED灯组 110和第二 LED灯组之间、 第一 LED灯组 110、 第二 LED灯组和电源之间通过 连接器耦合。 连接器包括正极连接器 210、 负极连接器 220、 第一连接器 230和 第二连接器 240,第一 LED灯组 110输入和输出端都耦合到第一连接器 230; 第 二 LED灯组输入和输出端都耦合到第二连接器 240; 电源的正极耦合到正极连 接器 210; 电源的负极耦合到负极连接器 220。第一 LED灯组 110的输出端通过 第一连接器 230、 正极连接器 210、 负极连接器 220和第二连接器 240耦合到第 二 LED灯组的输入端。
通过连接器, 一方面可以方便进行不同 LED灯组之间的串连, 另一方面, 每个 LED灯组可以作为单独的通用件使用, 既可应用于本发明, 也能应用于现 有的常规机种。 而每个部件对接的部位都用连接器来连接, 进一步方便装配。
本实施方式中两个灯组各自单独连接一个连接器, 其串联通过电源端的正 极连接器 210和负极连接器 220来实现, 这样每个 LED灯组都是独立的, 一旦 出现故障直接拔下相应的连接器既可更换, 不影响其他 LED灯组。
当然, 第一 LED灯组 110的输出端还可以通过第一连接器 230和第二连接 器 240耦合到第二 LED灯组的输入端, 即在 LED灯组处串联连接。
一般来说, LED背光驱动电路包括耦合到每个 LED灯组输出端的变流模块 电路板, 因此,第一 LED灯组 110的输出端和第二 LED灯组的输入端可以在变 流模块电路板上通过焊接方式实现串联。
两个 LED灯组串联以后,每条支路的 LED灯条的负载增大,对电源的驱动 能力有更高要求, 因此, 可以在 LED灯条输入端耦合升压电路, 其输出端耦合 降压电路。 通过升压电路和降压电路的配合, 可以增大 LED灯条两端的压差, 提高了电路的驱动能力。
如图 4所示, 升压电路和降压电路的输入端都连接到 VBL, D104、 D105、 D106、 D107串联形成 LED灯条。
升压电路包括第一储能电感 L103、 第一二极管 D102, 第一储能电感 L103 的一端连接电源 VBL, 另一端连接到所述第一二极管 D102的负极, 第一二极 管 D102的正极连接至 LED灯条的正极;第一二极管 D102的负极与电源的接地 端之间串联有第一可控开关 Q109; 第一二极管 D102的正极与电源的接地端之 间串联有第一储能电容 CP3。
降压电路包括储能第二可控开关 Q110、 第二二极管 D103, 第二可控开关 D103的一端连接电源 VBL, 另一端连接到第二二极管 D103的正极, 第二二极 管 D103的负极连接至 LED灯条的负极;第二二极管 D103的负极与电源的接地 端之间串联有第二储能电容 CP4;第二二极管 D103的正极与电源的接地端之间 串联有第二储能电感 L104。 优选的, 第一可控开关和第二可控开关的控制端电 连接, 这样可以采用同一控制信号来控制, 筒化控制电路。
本电路由于采用两种不同拓朴结构的电路对 LED灯条进行驱动, 一种为第 一储能电感 L103, 第一二极管 D102, 第一可控开关 Q109构成的升压拓朴架构 ( BOOST ), 它使得电源 VBL升压到一定的高压对 LED灯条正极进行驱动, 另 一种为第二储能电感 L104, 第二二极管 D103, 第二可控开关 Q110构成的降压 拓朴架构( BUCK— BOOST ) , 它使得电源 VBL降压到一定负压对 LED灯条负 极进行驱动, 这样就突破了单一升压电路所能提供的最高电压的限制, 增加了 LED灯条两端的压差, 完全可以满足串联后的 LED灯条的驱动要求。
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明, 不 能认定本发明的具体实施只局限于这些说明。 对于本发明所属技术领域的普通 技术人员来说, 在不脱离本发明构思的前提下, 还可以做出若干筒单推演或替 换, 都应当视为属于本发明的保护范围。

Claims

权利要求
1、 一种 LED 背光驱动电路, 包括多个显示区, 每个显示区包括至少两组 LED灯组, 每个显示区中至少两组 LED灯组串联设置; 形成多条并联在驱动电 路电源两端的 LED灯条。
2、 如权利要求 1所述的一种 LED背光驱动电路, 其特征在于, 所述每个 显示区包括第一 LED灯组和第二 LED灯组, 所述 LED背光驱动电路还包括连 接器,所述第一 LED灯组和第二 LED灯组之间 ,以及第一 LED灯组、第二 LED 灯组和电源之间通过连接器耦合。
3、 如权利要求 2所述的一种 LED背光驱动电路, 其中, 所述连接器包括 正极连接器、 负极连接器、 第一连接器和第二连接器, 所述第一 LED灯组输入 和输出端都耦合到第一连接器; 所述第二 LED灯组输入和输出端都耦合到第二 连接器; 所述电源的正极耦合到正极连接器; 所述电源的负极耦合到负极连接 器。
4、 如权利要求 3所述的一种 LED背光驱动电路, 其中, 所述第一 LED灯 组的输出端通过第一连接器、 正极连接器、 负极连接器和第二连接器耦合到第 二 LED灯组的输入端。
5、 如权利要求 3所述的一种 LED背光驱动电路, 其中, 所述第一 LED灯 组的输出端通过第一连接器和第二连接器耦合到第二 LED灯组的输入端。
6、 如权利要求 1所述的一种 LED背光驱动电路, 其中, 所述 LED背光驱 动电路包括耦合到每个 LED灯组输出端的变流模块电路板,所述第一 LED灯组 的输出端和第二 LED灯组的输入端通过所述变流模块电路板电连接。
7、 一种背光模组, 包括一种 LED背光驱动电路, 所述 LED背光驱动电路 包括多个显示区, 每个显示区包括至少两组 LED灯组, 每个显示区中至少两组 LED灯组串联设置; 形成多条并联在驱动电路电源两端的 LED灯条。
8、 如权利要求 7所述的一种背光模组, 其特征在于, 所述每个显示区包括 第一 LED灯组和第二 LED灯组, 所述 LED背光驱动电路还包括连接器, 所述 第一 LED灯组和第二 LED灯组之间, 以及第一 LED灯组、 第二 LED灯组和电 源之间通过连接器耦合。
9、如权利要求 8所述的一种背光模组, 其中, 所述连接器包括正极连接器、 负极连接器、 第一连接器和第二连接器, 所述第一 LED灯组输入和输出端都耦 合到第一连接器; 所述第二 LED灯组输入和输出端都耦合到第二连接器; 所述 电源的正极耦合到正极连接器; 所述电源的负极耦合到负极连接器。
10、 如权利要求 9所述的一种背光模组, 其中, 所述第一 LED灯组的输出 端通过第一连接器、 正极连接器、 负极连接器和第二连接器耦合到第二 LED灯 组的输入端。
11、 如权利要求 9所述的一种背光模组, 其中, 所述第一 LED灯组的输出 端通过第一连接器和第二连接器耦合到第二 LED灯组的输入端。
12、 如权利要求 7所述的一种背光模组, 其中, 所述 LED背光驱动电路包 括耦合到每个 LED灯组输出端的变流模块电路板,所述第一 LED灯组的输出端 和第二 LED灯组的输入端通过所述变流模块电路板电连接。
13、 一种 3D液晶显示装置, 包括如权利要求 8所述的一种背光模组。
14、 如权利要求 13所述的一种 3D液晶显示装置, 其中, 所述第一 LED灯 组和第二 LED灯组分别位于所述液晶显示装置的左右两侧。
15、 如权利要求 13所述的一种 3D液晶显示装置, 其中, 所述第一 LED灯 组和第二 LED灯组分别位于所述液晶显示装置的上下两端。
PCT/CN2012/078710 2012-07-10 2012-07-16 一种led背光驱动电路、背光模组和液晶显示装置 WO2014008672A1 (zh)

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