WO2014056259A1 - 一种背光模组及液晶显示装置 - Google Patents

一种背光模组及液晶显示装置 Download PDF

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Publication number
WO2014056259A1
WO2014056259A1 PCT/CN2012/083436 CN2012083436W WO2014056259A1 WO 2014056259 A1 WO2014056259 A1 WO 2014056259A1 CN 2012083436 W CN2012083436 W CN 2012083436W WO 2014056259 A1 WO2014056259 A1 WO 2014056259A1
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WIPO (PCT)
Prior art keywords
light
sheet
backlight module
liquid crystal
crystal display
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PCT/CN2012/083436
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English (en)
French (fr)
Inventor
余亚军
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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 US13/697,859 priority Critical patent/US20140098521A1/en
Publication of WO2014056259A1 publication Critical patent/WO2014056259A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors

Definitions

  • the present invention relates to the field of liquid crystal display, and in particular to a backlight module and a liquid crystal display device. Background technique
  • the existing liquid crystal display module usually performs a hollow design for the conventional backplane, so that the production cost of the liquid crystal display module can be further reduced.
  • the back panel is designed with a hollow liquid crystal display module, which has the following problems:
  • the white reflector on the back of the module will emit a part of the light from the hollow area of the back panel, causing light leakage. This light leakage makes the entire module look bright from the back and is visually uncomfortable.
  • the circuit board such as the power board or the system board is fixed on the bracket of the hollow back board, and the reflective sheet mounted on the back board is next to the circuit board and the reflective sheet. Any barrier. Since the reflective sheet used in the liquid crystal display module is of a foaming type, this type of reflective sheet is not fireproof and is easily affected by the high temperature of the circuit board, thereby making the entire module fireproof and safe.
  • the liquid crystal display module of the existing hollow backplane structure has problems of light leakage and fire safety regulation, and the solution of the problem is particularly important and urgent.
  • Summary of the invention The invention provides a backlight module and a liquid crystal display device, which can solve the light leakage of the backlight module and
  • the invention can also solve the technical problem of the fireproof and safety compliance of the backlight module.
  • the present invention provides a backlight module.
  • the backlight module includes at least: a backboard and a reflective sheet, the backboard includes at least one hollowed out area, and the reflective sheet is mounted on the backplane.
  • At least one light shielding layer is disposed between the back plate and the reflective sheet to cover the hollowed out area.
  • the light shielding layer is a light shielding sheet made of a flame retardant material, and the light shielding sheet is fixed on the back sheet.
  • the light shielding sheet comprises a black flame retardant polyester light shielding sheet or a black PET light shielding sheet.
  • each of the light shielding sheets has a similar shape to a corresponding hollow area.
  • the light shielding layer is a light shielding layer made of a flame retardant material and adhered to the non-reflecting surface of the reflection sheet.
  • the light shielding layer is a black flame retardant polyester film.
  • the present invention also discloses a liquid crystal display device having the above backlight module.
  • the backlight module and the liquid crystal display device provided by the present invention have a light shielding film disposed between the hollow backing plate and the retroreflective sheeting, a light shielding layer adhered to the non-reflecting surface of the reflective sheet, or corresponding to the hollowed-out area of the backing plate.
  • the non-reflecting surface of the reflective sheet is coated with a layer of flame-retardant particles, which can block the light transmitted by the reflecting sheet, avoid the problem of light leakage and 3D scanning flicker, and enable the backlight module to meet the safety standard; Process, which is conducive to cost control.
  • FIG. 1 is a schematic exploded view of a backlight module according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a retroreflective sheeting of a backlight module according to Embodiment 2 of the present invention. detailed description DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
  • FIG. 1 is a schematic diagram of an explosion structure of a backlight module according to an embodiment of the present invention.
  • the backlight module of the embodiment of the invention comprises: a back sheet 1, a reflective sheet 2 and other structural members.
  • the non-reflective surface of the retroreflective sheeting 2 is assembled toward the side of the backing plate 1, and the reflecting surface of the retroreflective sheeting 2 is assembled toward the other structural members.
  • the other structural members are in the assembled position as shown in Fig. 1, and from the bottom to the top are the light guide plate 91, the optical film 92, the plastic frame 93, the glass assembly 94, and the front frame 95.
  • Part of the back panel 1 is hollowed out, and the back panel 1 is set to be hollowed out, which not only reduces the cost of the backlight module, but also meets the development requirements of the thin and light backlight module.
  • a light shielding film 3 is disposed between the hollow back sheet 1 and the retroreflective sheeting 2, as shown in Fig. 1.
  • the light shielding sheet 3 can block the reflective sheet 2 exposed by the hollow area of the back sheet 1 to prevent light from being transmitted through the hollow area of the back sheet when the module is in operation, thereby preventing the module from being operated. Leakage and 3D scanning flicker problems.
  • a black shading PET polyethylene terephthalate plastic
  • PET polyethylene terephthalate plastic
  • the light shielding sheet 3 is made of a flame retardant material.
  • the light shielding sheet 3 disposed between the back sheet 1 and the reflection sheet 2 solves the problem of light leakage and 3D scanning flicker, and is also capable of solving the problem of safety regulation because it is made of a flame retardant material having a fireproof level.
  • the backlight module comprises: a back sheet 1, a reflective sheet 2, and other structural members.
  • the reflective surface of the retroreflective sheeting 2 is assembled toward the other structural members.
  • the other structural members are in the assembled position as shown in Fig. 1, and the light guide plate 91, the optical film 92, the plastic frame 93, the glass member 94, and the front frame 95 are sequentially arranged from bottom to top.
  • This embodiment is different from the first embodiment in that the light blocking sheet 3 is replaced by the reflecting sheet 2 having the light shielding layer 21.
  • the light shielding layer 21 is adhered to the non-reflecting surface of the reflective sheet 2, so that the reflective sheet 2 forms a multi-layered film structure, and the function of the light shielding layer 21 is as described above.
  • the light shielding sheet 3 has the same function, and also blocks the light transmitted by the reflection sheet 2 to prevent the mold. The group's light leakage during operation and the effect of 3D scanning flicker.
  • the light shielding layer 21 can be made of a flame retardant material to solve the safety problem.
  • the light-shielding layer 21 in this embodiment may use a black flame-retardant polyester film or a black light-shielding PET film. In this way, a reflective sheet having a reflective function on the front side and a light-shielding and fire-proof function on the reverse side is formed.
  • the light shielding layer 21 of the retroreflective sheeting 2 can be directly assembled toward one side of the backing plate 1. Compared with the first embodiment, since the light shielding layer 21 is formed on the reflection sheet 2, it is possible to carry out the assembly process and save costs.
  • the backlight module comprises: a back plate 1, a reflective sheet 2, and other structural members.
  • the non-reflective surface of the retroreflective sheeting 2 is assembled toward the side of the backing plate 1, and the reflective surface of the retroreflective sheeting 2 is assembled toward the other structural members.
  • the other structural members are in the assembled position as shown in Fig. 1, and the light guide plate 91, the optical film 92, the plastic frame 93, the glass member 94, and the front frame 95 are sequentially arranged from bottom to top.
  • This embodiment differs from the first embodiment and the second embodiment in that the flame-retardant particle layer is coated on the non-reflecting surface of the reflection sheet 2 corresponding to the hollow region of the back sheet 1.
  • the function of the flame-retardant particle layer is the same as that of the light-shielding sheet 3 and the light-shielding layer 21, and also blocks the light transmitted by the reflection sheet 2, thereby preventing the module from leaking light during operation and 3D scanning flicker, and at the same time solving Safety issues.
  • the flame-retardant particle layer can be sprayed after the reflective sheet 2 is assembled with the back sheet 1. Since the non-hollowed area of the backing plate 1 can block part of the light transmitted by the reflective sheet 2, only the hollowed-out area of the backing plate is sprayed, and finally a flame-retardant particle layer is formed, which is used to solve the operation of the module, and the light leakage and 3D scanning flicker, On the basis of the rules and other issues, it is also possible to save material and the action on the assembly.
  • the present invention also discloses a liquid crystal display device, which includes the backlight module in the above embodiment, and details are not described herein again.
  • the backlight module and the liquid crystal display device embodying the present invention have the following beneficial effects: a light shielding film is disposed between the hollow backing plate and the retroreflective sheeting, a light shielding layer is adhered to the non-reflecting surface of the reflective sheet, or a reflective sheet is adhered thereto. 2 transmitted light, to avoid the problem of light leakage and 3D scanning flicker, so that the backlight module can meet the safety standard; the cylindrical assembly process is conducive to cost control.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Liquid Crystal (AREA)

Abstract

一种背光模组，至少包括背板（1）和反光片（2）。背板（1）包括至少一镂空区域，反光片（2）装设在背板（1）上，在背板（1）和反光片（2）之间设置有至少一遮光层（3）以遮住镂空区域。液晶显示装置包括该背光模组。所述背光模组和液晶显示装置能够遮挡由反射片透射过的光线，避免发生漏光及3D扫描闪烁现象，使背光模组达到安规标准，简化装配程序，利于成本控制。

Description

一种背 组及液晶显示装置 本申请要求于 2012 年 10 月 10 日提交中国专利局、 申请号为 201210381342.3、 发明名称为 "一种背光模组及液晶显示装置" 的中国专利 申请的优先权， 上述专利的全部内容通过引用结合在本申请中。 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及液晶显示装置。 背景技术
现有的液晶显示模组， 为了节省背板材料的用量， 通常会针对传统背板 进行镂空设计， 使液晶显示模组的生产成本能够进一步降低。
背板设计镂空的液晶显示模组， 其存在如下的问题：
1、 在液晶显示模组点亮的时候， 模组背后的白色反射片会从背板的镂 空区域透出一部分光， 产生漏光现象。 该漏光现象使得整个模组从背后看起 来很亮， 视觉上非常的不舒适。
同时， 液晶显示器在播放 3D影片， 使用 3D扫描功能时， 整个液晶显 示器的背后会出现连续不停的明暗闪烁， 严重干扰到前方的观看者。 客户和 消费者均表示无法接受。
2、 液晶显示模组在组装后是将电源板或***板等电路板固定在镂空背 板的支架上的， 其紧挨着装设在背板上的反射片， 电路板和反射片之间没有 任何隔挡物。 由于液晶显示模组所使用的反射片属于发泡型， 这种类型的反 射片并不防火， 容易受电路板高温的影响， 进而使得整个模组的防火及安规
(产品认证中对产品的安全要求） 不达标。
综上， 现有镂空背板架构的液晶显示模组存在漏光和防火安规的问题， 该问题的解决显得尤为重要而迫切。 发明内容 本发明提供一种背光模组及液晶显示装置， 能够解决背光模组漏光和
3D扫描闪烁的技术问题。
本发明还可以解决背光模组防火和安规达标的技术问题。
为了解决上述技术问题， 本发明提供一种背光模组， 所述背光模组至少 包括： 背板和反光片， 所述背板包括至少一镂空区域， 所述反光片装设在所 述背板上；
在所述背板和所述反光片之间设置有至少一遮光层， 以遮住所述镂空区 域。
其中， 所述遮光层是由阻燃材料制成的遮光片， 所述遮光片固定在所述 背板上。
其中， 所述遮光片包括黑色阻燃聚酯遮光片或黑色 PET遮光片。
其中， 所述每一遮光片与对应的镂空区域具有相似形状。
其中，所述遮光层为由阻燃材料制成的且粘附在所述反射片的非反射面 上的遮光层。
其中， 所述遮光层为黑色阻燃聚酯薄膜。 区域相对应的区域上的阻燃粒子层。
进一步的， 本发明还公开了一种具有上述背光模组的液晶显示装置。 本发明所提供的背光模组及液晶显示装置， 由于在镂空背板和反光片之 间装设遮光片、在反射片的非反射面粘附有遮光层或是在与背板镂空区域相 对应的反射片的非反射面上涂设有阻燃粒子层， 能够遮挡由反射片透射过的 光线， 避免发生漏光及 3D扫描闪烁的问题， 使背光模组能够达到安规的标 准； 筒化装配工序， 利于成本控制。 附图说明
图 1是本发明实施例一背光模组的***结构示意图。
图 2是本发明实施例二背光模组的反光片的结构示意图。 具体实施方式 下面参考附图对本发明的优选实施例进行描述。
参见图 1 , 为本发明实施例背光模组的***结构示意图。
本发明实施例的背光模组包括： 背板 1、 反光片 2以及其它结构件。 其 中， 反光片 2的非反光面朝向背板 1一侧进行装配， 反光片 2的反光面朝向 其它结构件进行装配。
其他结构件按如图 1所示的装配位置， 由下至上依次是导光板 91、光学 膜片 92、 胶框 93、 玻璃组件 94以及前框 95。
背板 1的部分区域设置镂空， 将背板 1设为镂空， 不但可以降低背光模 组的成本， 而且还可以满足背光模组轻薄化的发展需求。
实施时， 在镂空的背板 1和反光片 2之间装设遮光片 3, 如图 1所示。 遮光片 3能够将由背板 1镂空区域显露出来的反光片 2进行遮挡， 防止 在模组工作时， 光线透过反射片 2由背板的镂空区域发散出， 进而起到防止 模组在工作时漏光及 3D扫描闪烁的问题。
具体的， 可以直接在背板 1 的内部粘附一张黑色遮光的 PET ( Polyethylene terephthalate, 聚对苯二曱酸类塑料）， 然后将反射片 2放在该 PET遮光片 3上， 这样， PET遮光片 3就能够有效遮挡由反射片 2透射过的 光线。
优选的， 遮光片 3使用阻燃材料制成。 这样， 设置在背板 1和反射片 2 之间的遮光片 3在解决漏光及 3D扫描闪烁问题的同时， 由于其使用防火等 级达标的阻燃材料制成， 还能够解决安规的问题。
本发明背光模组的第二实施例， 背光模组包括： 背板 1、 反光片 2以及 其它结构件。 其中， 反光片 2的反光面朝向其它结构件进行装配。
其他结构件按照如图 1所示的装配位置， 由下至上依次是导光板 91、光 学膜片 92、 胶框 93、 玻璃组件 94以及前框 95。
该实施方式与实施例一的不同之处在于， 通过设置具有遮光层 21 的反 射片 2代替遮光片 3。
如图 2所示， 为本实施例反射片的结构示意图， 遮光层 21粘附在反射 片 2的非反射面上， 使反射片 2形成了多层的膜结构， 遮光层 21的作用与 上述遮光片 3的作用相同， 也是遮挡由反射片 2透射过的光线， 起到防止模 组在工作时漏光及 3D扫描闪烁的作用。
同样， 遮光层 21可以使用阻燃材料制成， 能够解决安规问题。
本实施例中的遮光层 21可以使用黑色阻燃聚酯薄膜或黑色遮光的 PET 薄膜。 这样， 就形成了一张正面具有反射功能， 同时反面兼具遮光和防火功 能的反射片。 装配时， 可以直接将反光片 2的遮光层 21朝向背板 1的一侧 进行装配。 与实施例一相比， 由于遮光层 21成型在反射片 2上， 能够筒化 装配上的工序， 节省成本。
本发明背光模组的第三实施例， 背光模组包括： 背板 1、 反光片 2以及 其它结构件。 其中， 反光片 2的非反光面朝向背板 1的一侧进行装配， 反光 片 2的反光面朝向其它结构件进行装配。
其他结构件按照如图 1所示的装配位置， 由下至上依次是导光板 91、光 学膜片 92、 胶框 93、 玻璃组件 94以及前框 95。
该实施方式与实施例一和实施例二的不同之处在于， 该实施方式是在与 背板 1镂空区域相对应的反射片 2的非反射面上涂设有阻燃粒子层。
阻燃粒子层的作用与上述遮光片 3和遮光层 21的作用相同， 也是遮挡 由反射片 2透射过的光线， 起到防止模组在工作时漏光及 3D扫描闪烁的作 用， 其同时能够解决安规的问题。
装配过程中， 阻燃粒子层可以在反射片 2与背板 1装配后进行喷涂。 由 于背板 1的非镂空区域能够遮挡部分由反射片 2透射过的光线，仅在背板的 镂空区域进行喷涂， 最终形成阻燃粒子层， 在解决模组工作中漏光及 3D扫 描闪烁、 安规等问题的基础上， 还可以节省材料， 筒化装配上的动作。
本发明还公开了一种液晶显示装置， 该液晶显示装置包括上述实施例中 的背光模组， 具体实施方式不再赘述。
实施本发明的背光模组及液晶显示装置， 具有如下有益效果： 由于在镂 空背板和反光片之间装设遮光片、在反射片的非反射面粘附有遮光层或是在 由反射片 2透射过的光线， 避免发生漏光及 3D扫描闪烁的问题， 使背光模 组能够达到安规的标准； 筒化装配工序， 利于成本控制。

Claims

权 利 要 求
1、 一种背光模组， 其中， 所述背光模组至少包括： 背板和反光片， 所 述背板包括至少一镂空区域， 所述反光片装设在所述背板上；
在所述背板和所述反光片之间设置有至少一遮光层， 以遮住所述镂空区 域。
2、 如权利要求 1所述的背光模组， 其中， 所述遮光层是由阻燃材料制 成的遮光片， 所述遮光片固定在所述背板上。
3、 如权利要求 2所述的背光模组， 其中， 所述遮光片包括黑色阻燃聚 酯遮光片或黑色 PET遮光片。
4、 如权利要求 3所述的背光模组， 其中， 所述每一遮光片与对应的镂 空区域具有相似形状。
5、 如权利要求 1所述的背光模组， 其中， 所述遮光层为由阻燃材料制 成的且粘附在所述反射片的非反射面上的遮光层。
6、 如权利要求 5所述的背光模组， 其中， 所述遮光层为黑色阻燃聚酯 薄膜。
7、 如权利要求 6所述的背光模组， 其中， 所述遮光层为涂设在所述反 射片的非反射面上与所述背板的镂空区域相对应的区域上的阻燃粒子层。
8、 一种液晶显示装置， 其中， 所述液晶显示装置包括背光模组， 所述 背光模组至少包括： 背板和反光片， 所述背板包括至少一镂空区域， 所述反 光片装设在所述背板上；
在所述背板和所述反光片之间设置有至少一遮光层， 以遮住所述镂空区 域。
9、 如权利要求 8所述的液晶显示装置， 其中， 所述遮光层是由阻燃材 料制成的遮光片， 所述遮光片固定在所述背板上。
10、 如权利要求 9所述的液晶显示装置， 其中， 所述遮光片包括黑色阻 燃聚酯遮光片或黑色 PET遮光片。
11、 如权利要求 10所述的液晶显示装置， 其中， 所述每一遮光片与对 应的镂空区域具有相似形状。
12、 如权利要求 8所述的液晶显示装置， 其中， 所述遮光层为由阻燃材 料制成的且粘附在所述反射片的非反射面上的遮光层。
13、 如权利要求 12所述的液晶显示装置， 其中， 所述遮光层为黑色阻 燃聚酯薄膜。
14、 如权利要求 13所述的液晶显示装置， 其中， 所述遮光层为涂设在 所述反射片的非反射面上与所述背板的镂空区域相对应的区域上的阻燃粒 子层。
PCT/CN2012/083436 2012-10-10 2012-10-24 一种背光模组及液晶显示装置 WO2014056259A1 (zh)

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