WO2017107269A1 - 一种背光模组、液晶显示装置及其背光调节方法 - Google Patents

一种背光模组、液晶显示装置及其背光调节方法 Download PDF

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Publication number
WO2017107269A1
WO2017107269A1 PCT/CN2016/070917 CN2016070917W WO2017107269A1 WO 2017107269 A1 WO2017107269 A1 WO 2017107269A1 CN 2016070917 W CN2016070917 W CN 2016070917W WO 2017107269 A1 WO2017107269 A1 WO 2017107269A1
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WIPO (PCT)
Prior art keywords
liquid crystal
led lamp
adjustable resistor
led
display device
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Ceased
Application number
PCT/CN2016/070917
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English (en)
French (fr)
Inventor
郭星灵
熊彬
李曼
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Application filed by Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Technology Co Ltd
Priority to US14/909,109 priority Critical patent/US10146088B2/en
Publication of WO2017107269A1 publication Critical patent/WO2017107269A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
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    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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Definitions

  • the present invention claims the prior application priority of the application No. 201510969996.1, entitled “A Backlight Module, Liquid Crystal Display Device, and Backlight Adjustment Method", which was filed on December 22, 2015, the contents of which are incorporated herein by reference. The way is incorporated into this text.
  • the present invention relates to the field of liquid crystal display, and in particular, to a backlight module, a liquid crystal display device, and a backlight adjustment method thereof.
  • RGB is acted upon by a corresponding color resist on the CF substrate, and white W is acted upon by a transparent fill material OC.
  • the effects of the three colors of red, green and blue displayed on the LCD panel are determined by three color resistances and backlights of RGB, and the white effect of the liquid crystal panel is determined by two conditions, one is red, green and blue, and the backlight is One is OC+ backlight.
  • the NTSC (color gamut) of the liquid crystal panel and the color temperature and white point color coordinates of the liquid crystal panel are important considerations in product design.
  • the color temperature and white point of the red, green and blue resistance + backlight are not equal to the color temperature and white point of the OC+ backlight, resulting in a large difference between the color temperature of the liquid crystal panel designed and produced and the color temperature of the original design, resulting in color temperature and white point color coordinates. Drifting situation.
  • the color performance of the designed liquid crystal panel is not up to standard, and the color temperature difference is large.
  • Embodiments of the present invention provide a backlight module and a liquid crystal display device, which achieve the purpose of accurately adjusting the color temperature and white point color coordinates of the liquid crystal panel.
  • the invention also provides a backlight adjustment method.
  • the present invention provides a backlight module
  • the backlight module includes a light guide plate and an LED light bar disposed on a light incident side of the light guide plate, wherein the LED light bar includes a driving chip and a plurality of intervals of at least two different color temperatures.
  • the arranged LED lamps, the LED lamps of the same color temperature are sequentially connected in series to form a road, and each branch is connected in series with an adjustable resistor, and the branches formed by the plurality of LED lamps are connected in parallel with the driving chip.
  • the backlight module Connected to form a driving circuit, the backlight module further includes a control module, and the control module is connected to the driving circuit.
  • the LED lamp has two color temperatures
  • the LED lamp comprises a first LED lamp and a second LED lamp, the first LED lamp and the second LED lamp are staggered, and the color temperature of the first LED lamp Higher than a color temperature of the second LED lamp
  • the adjustable resistor includes a first adjustable resistor and a second adjustable resistor, the first adjustable resistor and the plurality of the first LED lamps are connected in series to form a first branch
  • the second adjustable resistor and the plurality of the second LED lamps are connected in series to form a second branch.
  • the first LED lamp and the second LED lamp are coated with phosphors having the same thickness or different thicknesses of the same thickness.
  • the backlight module further includes a prism sheet, a diffusion plate, and a reflection sheet.
  • the prism sheet, the diffusion sheet, the light guide plate, and the reflection sheet are sequentially stacked, and the prism sheet and the diffusion sheet are located in a light-emitting direction of the light guide plate.
  • the present invention also provides a liquid crystal display device, the liquid crystal display device includes a backlight module and a liquid crystal panel, and the liquid crystal panel and the backlight module are stacked;
  • the backlight module includes a light guide plate and an LED light bar disposed on a light incident side of the light guide plate, wherein the LED light bar includes a driving chip, a plurality of staggered LED lights of at least two different color temperatures, and a color temperature of the same
  • the LED lamps are sequentially connected in series to form a road, and each branch has an adjustable resistor in series, and the branches formed by the plurality of LED lamps are connected in parallel to the driving chip to form a driving circuit, and the backlight module is further connected.
  • a control module is included, the control module being coupled to the drive circuit.
  • the LED lamp has two color temperatures
  • the LED lamp comprises a first LED lamp and a second LED lamp, the color temperature of the first LED lamp is higher than the color temperature of the second LED lamp;
  • the first adjustable resistor and the second adjustable resistor are connected in series with the plurality of the first LED lamps to form a first branch, the second adjustable resistor and the plurality of the second LED lamps The series constitutes a second branch.
  • the present invention also provides a backlight adjustment method for a liquid crystal display device, and the backlight adjustment method of the liquid crystal display device includes:
  • the control module adjusts the adjustable resistance of each branch to change a current value of the branch through the LED lamp according to the color temperature to be displayed and the white point color coordinate.
  • the resistance of the first adjustable resistor is lowered, and the resistance of the second adjustable resistor is increased to increase the color temperature of the liquid crystal display device and reduce the drift of the white point color coordinate.
  • the resistance of the first adjustable resistor is increased, and the resistance of the second adjustable resistor is lowered to reduce the color temperature of the liquid crystal display device and reduce the drift of the white point color coordinate.
  • FIG. 1 is a schematic longitudinal cross-sectional view of a backlight module according to an embodiment of the present invention
  • FIG. 2 is a schematic transverse cross-sectional view of the backlight module of FIG. 1;
  • FIG. 3 is a schematic diagram of a driving circuit of an LED light bar of the backlight module illustrated in FIG. 1;
  • FIG. 4 is a schematic flow chart of a backlight adjustment method of a liquid crystal display device according to an embodiment of the present invention.
  • an embodiment of the present invention provides a backlight module 100 including a prism sheet 10 , a diffusion sheet 20 , a light guide plate 30 , a reflection sheet 40 , and an LED strip 60 .
  • the prism sheet 10, the diffusion sheet 20, the light guide plate 30, and the reflection sheet 40 are laminated in this order.
  • the prism sheet 10 and the diffusion sheet 20 are located in the light exiting direction of the light guide plate 30.
  • the LED light bar 60 faces the lateral direction of the light guide plate 30.
  • the LED light bar 60 further includes a substrate 69 and at least two LED lamps 61 of different color temperatures, a driving chip 62 and a plurality of adjustable resistors.
  • the number of the LED lamps 61 is 8 to 12.
  • the LED lamps 61 of different color temperatures are spaced apart on the substrate 69.
  • the LED lamps 61 of the same color temperature are sequentially connected in series to form a branch circuit, and each of the branches is connected in series with one of the adjustable resistors, and each of the branches is connected in parallel to the driving chip 62 to form a driving circuit.
  • the backlight module further includes a control module (not shown), and the control module is connected to the driving circuit.
  • the control module can control a resistance change of the adjustable resistor in the driving circuit.
  • the LED lamp 61 is divided into two color temperatures, and the LED lamp 61 includes a first LED lamp 611 and a second LED lamp 612.
  • the color temperature of the first LED lamp 611 is higher than the color temperature of the second LED lamp 612.
  • the difference in color temperature between the first LED lamp 611 and the second LED lamp 612 can be achieved by coating phosphors having the same concentration but different thicknesses or phosphors having different concentrations but the same thickness.
  • the phosphor thickness of the first LED lamp 611 is smaller than the phosphor of the second LED lamp 612. Thickness; when the first LED lamp 611 and the second LED lamp 612 have phosphors having different concentrations but the same thickness, the phosphor concentration of the first LED lamp 611 is smaller than the phosphor concentration of the second LED lamp 612 .
  • the first LED lamp 611 and the second LED lamp 612 are staggered on the substrate.
  • the number of the first LED lamps 611 is four
  • the number of the second LED lamps 612 is four.
  • the four first LED lamps 611 are connected in series to form a first branch 66
  • the four second LED lamps 612 are connected in series to form a second branch 67.
  • the adjustable resistor includes a first adjustable resistor 631 and a second adjustable resistor 632.
  • the first adjustable resistor 631 is connected in series with the four first LED lamps 611 in the first branch 66.
  • the second adjustable resistor 632 is connected in series with the four second LED lamps 612 in the second branch 67.
  • the first branch 66 is connected in parallel with the second branch 67 and connected to the driving chip 62 to form a driving circuit 70.
  • the driving circuit 70 can adjust the color temperature of the backlight module 100.
  • the present invention also provides a liquid crystal display device including the backlight module 100 and a liquid crystal panel, and the backlight module 100 and the liquid crystal panel are stacked.
  • the color temperature and white point color coordinates of the liquid crystal display device can be adjusted by the driving circuit of the backlight module 100.
  • the present invention further provides a backlight adjustment method of the liquid crystal display device described above.
  • the method is to realize that the color temperature and the white point color coordinate of the liquid crystal display device are adjustable.
  • the backlight adjustment method of the liquid crystal display device includes:
  • Step S1 determining a color temperature and a white point color coordinate to be displayed by the liquid crystal display device
  • step S2 the control module adjusts the adjustable resistance of each branch to change the current value of the branch through the LED lamp 61 according to the color temperature to be displayed and the white point color coordinate.
  • the resistance value of the first adjustable resistor 631 is lowered, thereby increasing the current value passing through the first LED lamp 611.
  • the resistance value of the second adjustable resistor 632 is lowered, thereby increasing the current value passing through the second LED lamp 612.
  • the overall color temperature of the liquid crystal display device is biased toward the color temperature of the first LED lamp 611, that is, a high color temperature, thereby increasing the color temperature of the liquid crystal display device and reducing the drift of the white point color coordinates.
  • the resistance value of the first adjustable resistor 631 is increased, thereby reducing the current value passing through the first LED lamp 611.
  • the resistance of the second adjustable resistor 632 is lowered, thereby increasing the current value passing through the second LED lamp 612.
  • the overall color temperature of the liquid crystal display device is biased toward the color temperature of the second LED lamp 612, that is, a low color temperature, thereby reducing the color temperature of the liquid crystal display device and reducing the drift of the white point color coordinates.
  • the adjustable resistor is connected in series in the driving circuit, and the driving current of the LED lamp 61 can be controlled by accurately adjusting the current limiting manner by the resistor, thereby accurately adjusting the brightness of the LED lamp 61 to make the color temperature of the liquid crystal display device And white point color coordinates for precise adjustment.

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Abstract

一种背光模组（100）、液晶显示装置及其背光调节方法；所述背光模组（100）包括导光板（30）和设于所述导光板（30）的入光侧的LED灯条（60），所述LED灯条（60）包括驱动芯片（62）、若干至少两种不同色温的交错排列的LED灯（61），相同色温的所述LED灯（61）依次串联构成一支路，并且每一支路串联一个可调电阻（631、632），若干个LED灯（61）构成的支路并联后均与所述驱动芯片（62）相连构成驱动电路（70），所述背光模组（100）还包括控制模块，所述控制模块与所述驱动电路（70）连接。所述液晶显示装置的背光调节方法包括：确定所述液晶显示装置待显示的色温及白点色坐标（S1）；所述控制模块根据所述待显示的色温及白点色坐标，调节所述每一支路的所述可调电阻（631、632）改变该支路通过所述LED灯（61）的电流值（S2）。

Description

一种背光模组、液晶显示装置及其背光调节方法
本发明要求2015年12月22日递交的发明名称为“一种背光模组、液晶显示装置及其背光调节方法”的申请号201510969996.1的在先申请优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本发明涉及液晶显示领域，尤其涉及一种背光模组、液晶显示装置及其背光调节方法。
背景技术
采用RGBW像素排列的液晶面板架构，RGB在CF基板是由相应色阻充当，而白色W则是由透明的填平材料OC充当。液晶面板显示的红绿蓝这三种颜色的效果分别由RGB三种色阻和背光来决定，液晶面板显示的白色的效果就分两种条件决定，一种是红绿蓝色阻+背光，一种是OC+背光。液晶面板的NTSC(色域)和液晶面板的色温及白点色坐标是产品设计中重要的考量因素。然而红绿蓝色阻+背光的色温及白点却不等于OC+背光的色温及白点，导致设计生产出来的液晶面板的色温与一开始设计的色温相差很大，造成色温及白点色坐标漂移的情况。使设计出来的液晶面板色彩表现不达标，色温差异大。
发明内容
本发明实施例提供一种背光模组及液晶显示装置，实现使液晶面板的色温和白点色坐标精确可调的目的。
本发明还提供一种及背光调节方法。
为了实现上述目的，本发明实施方式提供如下技术方案：
本发明提供一种背光模组，所述背光模组包括导光板和设于所述导光板的入光侧的LED灯条，所述LED灯条包括驱动芯片、若干至少两种不同色温的间隔排列的LED灯，相同色温的所述LED灯依次串联构成一支路，并且每一支路串联一个可调电阻，若干个LED灯构成的支路并联后均与所述驱动芯片 相连构成驱动电路，所述背光模组还包括控制模块，所述控制模块与所述驱动电路连接。
其中，所述LED灯具有两种色温，所述LED灯包括第一LED灯和第二LED灯，所述第一LED灯和所述第二LED灯交错排列，所述第一LED灯的色温高于所述第二LED灯的色温；所述可调电阻包括第一可调电阻和第二可调电阻，所述第一可调电阻与若干所述第一LED灯串联构成第一支路，所述第二可调电阻与若干所述第二LED灯串联构成第二支路。
其中，所述第一LED灯与所述第二LED灯涂覆相同厚度不同浓度或者相同浓度不同厚度的荧光粉。
其中，所述背光模组还包括棱镜片、扩散板和反射片，所述棱镜片、扩散片、导光板和反射片依次层叠设置，并且所述棱镜片、扩散片位于导光板出光方向。
本发明还提供一种液晶显示装置，所述液晶显示装置包括背光模组和液晶面板，所述液晶面板与所述背光模组层叠设置；
所述背光模组包括导光板和设于所述导光板的入光侧的LED灯条，所述LED灯条包括驱动芯片、若干至少两种不同色温的交错排列的LED灯，相同色温的所述LED灯依次串联构成一支路，并且每一支路串联一有个可调电阻，若干个LED灯构成的支路并联后均与所述驱动芯片相连构成驱动电路，所述背光模组还包括控制模块，所述控制模块与所述驱动电路连接。
其中，所述LED灯具有两种色温，所述LED灯包括第一LED灯和第二LED灯，所述第一LED灯的色温高于所述第二LED灯的色温；所述可调电阻包括第一可调电阻和第二可调电阻，所述第一可调电阻与若干所述第一LED灯串联构成第一支路，所述第二可调电阻与若干所述第二LED灯串联构成第二支路。
本发明还提供一种液晶显示装置的背光调节方法，所述液晶显示装置的背光调节方法包括：
确定所述液晶显示装置待显示的色温及白点色坐标；
所述控制模块根据所述待显示的色温及白点色坐标，调节所述每一支路的所述可调电阻改变该支路通过所述LED灯的电流值。
其中，调低所述第一可调电阻的阻值，并调高所述第二可调电阻的阻值来提高所述液晶显示装置的色温以及降低白点色坐标的漂移。
其中，调高所述第一可调电阻的阻值，并调低所述第二可调电阻的阻值来降低所述液晶显示装置的色温以及降低白点色坐标的漂移。
本发明的一种背光模组、液晶显示装置及其背光调节方法，通过交叉布置不同色温的LED光源，并在LED光源电路中串联可变电阻并设定电阻限流的方式，控制不同色温LED搭配比例，实现液晶面板的色温和白点色坐标精确可调。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的背光模组的纵向截面示意图；
图2是图1所述的背光模组的横向截面示意图；
图3是图1所述的背光模组的LED灯条的驱动电路原理图；
图4是本发明实施例提供的液晶显示装置的背光调节方法得流程示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请一并参阅图1和图2，本发明实施方式提供一种背光模组100，所述背光模组100包括棱镜片10、扩散片20、导光板30、反射片40和一条LED灯条60。所述棱镜片10、扩散片20、导光板30和反射片40依次层叠设置。并且所述棱镜片10、扩散片20位于所述导光板30的出光方向。所述LED灯条60正对所述导光板30的侧向。
请一并参阅图2和图3，进一步的，所述LED灯条60包括一基板69和至少两种不同色温的LED灯61、驱动芯片62和若干可调电阻。所述LED灯61的个数为8至12个。所述不同色温的LED灯61在所述基板69上间隔排列。相同色温的所述LED灯61依次串联构成一支路，每一支路串联一个所述可调电阻，所述每一支路并联后与所述驱动芯片62相连构成驱动电路。所述背光模组还包括控制模块(图未示)，所述控制模块与所述驱动电路连接。所述控制模块可控制所述驱动电路中所述可调电阻的阻值变化。
在本实施例中，所述LED灯61分为两种色温，所述LED灯61包括第一LED灯611和第二LED灯612。所述第一LED灯611的色温高于所述第二LED灯612的色温。所述第一LED灯611和第二LED灯612的色温的不同可通过涂覆浓度相同但厚度不同的荧光粉或者浓度不同但厚度相同的荧光粉来实现。具体地，当所述第一LED灯611和第二LED灯612具有浓度相同但厚度不同的荧光粉时，所述第一LED灯611的荧光粉厚度小于所述第二LED灯612的荧光粉厚度；当所述第一LED灯611和第二LED灯612具有浓度不同但厚度相同的荧光粉时，所述第一LED灯611的荧光粉浓度小于所述第二LED灯612的荧光粉浓度。
请再次参见图2，进一步的，所述第一LED灯611和第二LED灯612在所述基板上交错排列。在本实施例中，所述第一LED灯611的个数为四个，所述第二LED灯612的个数为四个。四个所述第一LED灯611串联构成第一支路66，四个所述第二LED灯612串联构成第二支路67。
进一步的，所述可调电阻包括第一可调电阻631和第二可调电阻632。所述第一可调电阻631与四个所述第一LED灯611串联在所述第一支路66。所述第二可调电阻632与四个所述第二LED灯612串联在所述第二支路67。所述第一支路66与所述第二支路67并联后与所述驱动芯片62相连构成驱动电路70。所述驱动电路70可以调节所述背光模组100的色温。
本发明还提供一种液晶显示装置，所述液晶显示装置包括所述背光模组100和液晶面板，所述背光模组100与所述液晶面板层叠设置，。所述液晶显示装置的色温和白点色坐标可以通过所述背光模组100的驱动电路调节。
请参阅图4，本发明还提供了一种以上所述的液晶显示装置的背光调节方 法，以实现液晶显示装置的色温和白点色坐标可调。所述液晶显示装置的背光调节方法包括：
步骤S1，确定所述液晶显示装置待显示的色温及白点色坐标；
步骤S2，所述控制模块根据所述待显示的色温及白点色坐标，调节所述每一支路的所述可调电阻改变该支路通过所述LED灯61的电流值。
当待显示的所述液晶显示装置的色温偏低并且白点色坐标漂移较大时，调低所述第一可调电阻631的阻值，从而提高通过所述第一LED灯611的电流值；同时调高所述第二可调电阻632的阻值，从而降低通过所述第二LED灯612的电流值。进而使所述液晶显示装置的整体色温偏向所述第一LED灯611的色温，即高色温，来提高所述液晶显示装置的色温以及降低白点色坐标的漂移。
当待显示的所述液晶显示装置的色温偏高并且白点色坐标漂移较大时，调高所述第一可调电阻631的阻值，从而降低通过所述第一LED灯611的电流值；同时调低所述第二可调电阻632的阻值，从而提高通过所述第二LED灯612的电流值。进而使所述液晶显示装置的整体色温偏向所述第二LED灯612的色温，即低色温，来降低所述液晶显示装置的色温以及降低白点色坐标的漂移。
在驱动电路里面串联所述可调电阻，可以通过电阻精确微调限流的方式，控制所述LED灯61的驱动电流，从而精确调节所述LED灯61的亮度，使所述液晶显示装置的色温以及白点色坐标可实现精确调节。
以上所揭露的仅为本发明较佳实施例而已，当然不能以此来限定本发明之权利范围，本领域普通技术人员可以理解实现上述实施例的全部或部分流程，并依本发明权利要求所作的等同变化，仍属于发明所涵盖的范围。

Claims (9)

  1. 一种背光模组，其中，所述背光模组包括导光板和设于所述导光板的入光侧的LED灯条，所述LED灯条包括驱动芯片、若干至少两种不同色温的间隔排列的LED灯，相同色温的所述LED灯依次串联构成一支路，并且每一支路串联一个可调电阻，若干个LED灯构成的支路并联后均与所述驱动芯片相连构成驱动电路，所述背光模组还包括控制模块，所述控制模块与所述驱动电路连接。
  2. 如权利要求1所述的背光模组，其中，所述LED灯具有两种色温，所述LED灯包括第一LED灯和第二LED灯，所述第一LED灯和所述第二LED灯交错排列，所述第一LED灯的色温高于所述第二LED灯的色温；所述可调电阻包括第一可调电阻和第二可调电阻，所述第一可调电阻与若干所述第一LED灯串联构成第一支路，所述第二可调电阻与若干所述第二LED灯串联构成第二支路。
  3. 如权利要求2所述的背光模组，其中，所述第一LED灯与所述第二LED灯涂覆相同厚度不同浓度或者相同浓度不同厚度的荧光粉。
  4. 如权利要求1所述的背光模组，其中，所述背光模组还包括棱镜片、扩散板和反射片，所述棱镜片、扩散片、导光板和反射片依次层叠设置，并且所述棱镜片、扩散片位于导光板出光方向。
  5. 一种液晶显示装置，其中，所述液晶显示装置包括背光模组和液晶面板，所述液晶面板与所述背光模组层叠设置；
    所述背光模组包括导光板和设于所述导光板的入光侧的LED灯条，所述LED灯条包括驱动芯片、若干至少两种不同色温的交错排列的LED灯，相同色温的所述LED灯依次串联构成一支路，并且每一支路串联一有个可调电阻，若干个LED灯构成的支路并联后均与所述驱动芯片相连构成驱动电路，所述背光模组还包括控制模块，所述控制模块与所述驱动电路连接。
  6. 如权利要求5所述的液晶显示装置，其中，所述LED灯具有两种色温，所述LED灯包括第一LED灯和第二LED灯，所述第一LED灯的色温高于所述第二LED灯的色温；所述可调电阻包括第一可调电阻和第二可调电阻，所 述第一可调电阻与若干所述第一LED灯串联构成第一支路，所述第二可调电阻与若干所述第二LED灯串联构成第二支路。
  7. 一种液晶显示装置的背光调节方法，其中，所述液晶显示装置的背光调节方法包括：
    确定所述液晶显示装置待显示的色温及白点色坐标；
    所述控制模块根据所述待显示的色温及白点色坐标，调节所述每一支路的所述可调电阻改变该支路通过所述LED灯的电流值。
  8. 如权利要求7所述液晶显示装置的背光调节方法，其中，调低所述第一可调电阻的阻值，并调高所述第二可调电阻的阻值来提高所述液晶显示装置的色温以及降低白点色坐标的漂移。
  9. 如权利要求7所述液晶显示装置的背光调节方法，其中，调高所述第一可调电阻的阻值，并调低所述第二可调电阻的阻值来降低所述液晶显示装置的色温以及降低白点色坐标的漂移。
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