WO2012155362A1 - 一种液晶背光模组及膜材背板组件 - Google Patents

一种液晶背光模组及膜材背板组件 Download PDF

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Publication number
WO2012155362A1
WO2012155362A1 PCT/CN2011/074769 CN2011074769W WO2012155362A1 WO 2012155362 A1 WO2012155362 A1 WO 2012155362A1 CN 2011074769 W CN2011074769 W CN 2011074769W WO 2012155362 A1 WO2012155362 A1 WO 2012155362A1
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hole
optical film
rectangle
liquid crystal
backlight module
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PCT/CN2011/074769
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English (en)
French (fr)
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李全
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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 US13/260,313 priority Critical patent/US20120293928A1/en
Publication of WO2012155362A1 publication Critical patent/WO2012155362A1/zh

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    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means

Definitions

  • the present patent application relates to a liquid crystal backlight module, and the patent application also relates to a film back sheet assembly.
  • the liquid crystal backlight module in order to improve the uniformity of the backlight, the brightness of the center, etc., a variety of optical films are often used. Most of the substrates of these optical films are made of smooth PET or PC. Since the coefficient of friction of each other is small, the problem of jumping out of the optical film often occurs.
  • the common practice is to use plastic frame to press the optical film.
  • the gap in the Z direction is often large.
  • the plastic frame presses the optical film. The area is shrinking. Therefore, this positioning effect is not good.
  • Another way is to attach the tape, because most of the tape is easy to fail in the high temperature and high humidity loop test and the labor cost is also high due to the consideration of the attaching precision, and it is also not convenient to return to the work.
  • the purpose of this patent application is to provide a liquid crystal backlight module and a film back plate assembly to solve the problem of poor positioning of the optical film in the existing liquid crystal backlight module.
  • a liquid crystal backlight module comprising an optical film material and a back plate frame, the optical film material being placed on the back plate frame, the edge of the optical film material being provided with at least one through hole, the through hole including a wide portion and a narrow portion, the back
  • the plate frame is provided with at least one positioning structure, the positioning structure is a convex member, the protruding member has an inverted L shape in cross section, and the optical film material is placed in a positioning structure of the back plate frame by a wide portion of the through hole.
  • the upper structure of the protruding member is stuck on the back surface of the optical film;
  • the gap between the through hole and the protruding member is 0.15-0.5 mm;
  • the protruding member is die-cut and a folding wall formed by bending an upper portion;
  • the optical film material is one or more of a diffusion plate, a diffusion sheet, and a brightness enhancement sheet; and
  • the through hole is L-shaped or b-shaped.
  • a liquid crystal backlight module comprising an optical film and a back plate frame, wherein the optical film is placed on the back plate frame, the edge of the optical film is provided with at least one through hole, and the back plate frame is provided with at least one positioning structure, the through hole Engage with the positioning structure.
  • the through hole includes a wide portion and a narrow portion
  • the positioning structure is a convex member
  • the protruding portion has an inverted L shape in cross section
  • the optical film material is placed in the back by the wide portion of the through hole.
  • the positioning structure of the plate frame is then translated to the narrow portion, and the upper structure of the raised member is caught on the back side of the film.
  • the upper portion of the through hole is a narrow portion
  • the lower portion of the through hole is a wide portion
  • the wide portion and the narrow portion are both rectangular
  • the width of the wide portion is larger than the width of the narrow portion
  • the upper portion of the through hole is a narrow portion
  • the lower portion of the through hole is a wide portion
  • the narrow portion is a combination of a first rectangle and a first semicircle
  • a half circle is at an upper end of the first rectangle
  • a wide portion is a combination of a second rectangle and a second semicircle
  • the second semicircle is on a side of the second rectangle.
  • an upper portion of the through hole is a narrow portion
  • a lower portion of the through hole is a wide portion
  • a narrow portion is a first rectangle
  • a wide portion is a second rectangle and a second semicircle
  • the second semicircle is on a side of the second rectangle.
  • the gap between the through hole and the positioning structure is 0.15-0.5 mm.
  • the protruding member is a folding wall formed by punching and bending the upper portion.
  • the optical film material is one or more of a diffusion plate, a diffusion sheet, and a brightness enhancement sheet.
  • a film backing plate assembly comprising an optical film material and a back plate frame, the optical film material being placed on the back plate frame, the edge of the optical film material being provided with at least one through hole, the back plate frame being provided with at least one positioning structure, The through hole is engaged with the positioning structure.
  • the through hole of the optical film is engaged with the positioning structure of the back plate frame, and the structure is simple to assemble, and can restrict the movement of the film in the Z direction and improve Positioning effect. Specifically, the upper structure of the raised member of the positioning structure is caught on the back side of the film, thereby restricting the movement of the film in the Z direction. Since the patent application does not require tape attachment, the reliability of the entire structure is improved, assembly time is reduced, cost is reduced, and rework is facilitated.
  • the through hole of the optical film is engaged with the positioning structure of the back plate frame, and the structure is simple to assemble, and can restrict the movement of the film in the Z direction and improve Positioning effect. Specifically, the upper structure of the raised member of the positioning structure is caught on the back side of the film, thereby restricting the movement of the film in the Z direction. Since the patent application does not require tape attachment, the reliability of the entire structure is improved, assembly time is reduced, cost is reduced, and rework is facilitated.
  • FIG. 1 is a schematic view showing the assembly of an optical film of a liquid crystal backlight module.
  • FIG. 2 is a schematic view showing a positioning structure of a backplane frame of a liquid crystal backlight module.
  • Fig. 3 is a schematic view showing a through hole of the optical film of the first embodiment.
  • Example 4 is a schematic view showing a through hole of an optical film of Example 2.
  • Fig. 5 is a schematic view showing a through hole of an optical film of the third embodiment.
  • a liquid crystal backlight module includes a light source, an optical film 1, a back plate frame 2, a diffusion plate, a light guide plate, and a bottom reflection sheet.
  • the optical film 1 is placed on the back plate frame 2.
  • the edge of the optical film 1 is provided with at least one through hole 11.
  • the through hole 11 includes a communicating wide portion 111 and a narrow portion 112, and a lower portion of the through hole 11 is a wide portion 111, and an upper portion of the through hole 11 is The narrow portion 112, the wide portion 111 and the narrow portion 112 are all rectangular, and the width of the wide portion 111 is greater than the width of the narrow portion 112.
  • the backboard frame 2 is provided with at least one positioning structure 21, and the positioning structure 21 is a convex member, and the protruding member has an inverted L shape in cross section.
  • the positioning structure 21 corresponds to the through hole 11, and the optical film 1 is placed in the positioning structure 21 of the back plate frame 2 by the wide portion 111 of the through hole 11, and then translated to the narrow portion 112, and the upper structure of the convex member is stuck in the film The back. Thereby, the movement of the film 1 in the Z direction is restricted by the upper structure of the projection.
  • the raised member is a folded wall formed by punching and bending the upper portion.
  • the gap between the membrane through hole 11 and the positioning structure 21 is set at 0.15 to 0.5 mm.
  • the through hole 11 of the optical film 1 and the positioning structure 21 of the back plate frame 2 may also have two or more corresponding ones.
  • the optical film 1 is one or more of a diffusion plate, a diffusion sheet, and a brightness enhancement sheet.
  • the liquid crystal backlight module can use LED or CCFL (cold cathode tube) as a light source.
  • the difference between the embodiment and the first embodiment is that the upper portion of the through hole 11 is a narrow portion 112, and the lower portion of the through hole 11 is a wide portion 111, and the narrow portion 112 is a first rectangle.
  • the first semicircle is at the upper end of the first rectangle
  • the wide portion 111 is a combination of a second rectangle and a second semicircle. The second rectangular side is described.
  • the difference between the embodiment and the first embodiment is that the upper portion of the through hole 11 is a narrow portion 112, and the lower portion of the through hole 11 is a wide portion 111.
  • the narrow portion 112 is a first rectangle and is wide.
  • the portion 111 is a combination of a second rectangle and a second semicircle, and the second semicircle is on the second rectangular side.
  • the present patent application does not limit the number of the membrane through holes 11 and the positioning structure 21, the specific position of the arrangement, and the like. Further, the positioning structure 21 of the backboard frame 2 does not have any defects such as burrs in contact with the film 1.

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

Description

一种液晶背光模组及膜材背板组件 技术领域
本专利申请涉及一种液晶背光模组，本专利申请还涉及一种膜材背板组件。
背景技术
在液晶背光模组中，为了提高背光的均匀度，中心的亮度等，往往会用到多种光学膜材。这些光学膜材的基材大多为光滑的PET材质或PC材质。由于彼此摩擦系数较小，故经常出现光学膜材跳出的问题。目前常见的做法是采用塑胶框压光学膜材，但由于设计时塑胶材质与PET材质涨缩值的考量，故经常Z方向的间隙较大，同时由于窄边框的设计，塑胶框压光学膜片的面积在缩小。因此这种定位效果不佳。另一种方式是贴附胶带，由于大部分胶带在高温高湿环测时容易失效且由于考虑贴附精度故人工成本也较高，同时也不便于返工作业。
 技术问题
本专利申请的目的在于提供一种液晶背光模组及膜材背板组件，以解决现有液晶背光模组中光学膜材定位效果不佳的问题。
 技术解决方案
本专利申请的目的通过以下技术方案实现：
一种液晶背光模组，包含光学膜材和背板框架，光学膜材放置在背板框架上，光学膜材的边缘设置有至少一个通孔，所述通孔包括宽部和窄部，背板框架设置有至少一个定位结构，所述定位结构为一凸起件，所述凸起件的横截面呈倒L形，光学膜材由通孔的宽部放入背板框架的定位结构，然后平移至窄部，所述凸起件的上部结构卡在光学膜材的背面；所述通孔与所述凸起件的间隙为0.15~0.5mm；所述凸起件为经冲切和对上部进行弯折而形成的折墙；所述光学膜材为扩散板、扩散片、增光片中的一种或几种；所述通孔为L形或b形。
一种液晶背光模组，包含光学膜材和背板框架，光学膜材放置在背板框架上，光学膜材的边缘设置有至少一个通孔，背板框架设置有至少一个定位结构，通孔与定位结构卡接。
在本专利申请的一实施例中，通孔包括宽部和窄部，定位结构为一凸起件，凸起件的横截面呈倒L形，光学膜材由通孔的宽部放入背板框架的定位结构，然后平移至窄部，凸起件的上部结构卡在膜材的背面。
在本专利申请的一实施例中，所述通孔的上部为窄部，所述通孔的下部为宽部，宽部和窄部均为长方形，宽部的宽度大于窄部的宽度。
在本专利申请的一实施例中，所述通孔的上部为窄部，所述通孔的下部为宽部，所述窄部为第一长方形和第一半圆形的组合，所述第一半圆形在所述第一长方形的上端，宽部为第二长方形和第二半圆形的组合，所述第二半圆形在所述第二长方形一侧。
在本专利申请的一实施例中，所述通孔的上部为窄部，所述通孔的下部为宽部，窄部为第一长方形，宽部为第二长方形和第二半圆形的组合，所述第二半圆形在所述第二长方形一侧。
在本专利申请的一实施例中，所述通孔与所述定位结构的间隙为0.15~0.5mm。
在本专利申请的一实施例中，所述凸起件为经冲切和对上部进行弯折而形成的折墙。
在本专利申请的一实施例中，所述光学膜材为扩散板、扩散片、增光片中的一种或几种。
本专利申请还提供了一种膜材背板组件，其技术方案如下：
一种膜材背板组件，包含光学膜材和背板框架，光学膜材放置在背板框架上，光学膜材的边缘设置有至少一个通孔，背板框架设置有至少一个定位结构，所述通孔与所述定位结构卡接。
本专利申请的液晶背光模组和膜材背板组件中，光学膜材的通孔与背板框架的定位结构卡接，这种结构组装简单，并能限制膜材在Z方向的运动，提高了定位效果。具体而言，定位结构的凸起件的上部结构卡在膜材的背面，从而限制膜材在Z方向的运动。由于本专利申请不需要贴附胶带，提高了整个结构的可靠性，减少了组装工时，降低了成本，并且方便返工。
 有益效果
本专利申请的液晶背光模组和膜材背板组件中，光学膜材的通孔与背板框架的定位结构卡接，这种结构组装简单，并能限制膜材在Z方向的运动，提高了定位效果。具体而言，定位结构的凸起件的上部结构卡在膜材的背面，从而限制膜材在Z方向的运动。由于本专利申请不需要贴附胶带，提高了整个结构的可靠性，减少了组装工时，降低了成本，并且方便返工。
 附图说明
图1是液晶背光模组的光学膜材装配示意图。
图2是液晶背光模组的背板框架定位结构示意图。
图3是实施例一的光学膜材的通孔示意图。
图4是实施例二的光学膜材的通孔示意图。
图5是实施例三的光学膜材的通孔示意图。
 本发明的最佳实施方式
为让本专利申请上述目的、特征及优点更明显易懂，下文特举本专利申请较佳实施例，并配合附图，作详细说明。
实施例一
参照图1和图2，一种液晶背光模组，包含光源、光学膜材1、背板框架2、扩散板、导光板和底反射片。光学膜材1放置在背板框架2上。光学膜材1的边缘设置有至少一个通孔11，如图3所示，通孔11包括连通的宽部111和窄部112，通孔11的下部为宽部111，通孔11的上部为窄部112，宽部111和窄部112均为长方形，宽部111的宽度大于窄部112的宽度。
如图1、2所示，背板框架2设置有至少一个定位结构21，定位结构21为一凸起件，凸起件的横截面呈倒L形。定位结构21和通孔11相对应，光学膜材1由通孔11的宽部111放入背板框架2的定位结构21，然后平移至窄部112，凸起件的上部结构卡在膜材的背面。从而利用凸起件的上部结构限制了膜材1在Z方向的运动。在本实施例中，凸起件为经冲切和对上部进行弯折而形成的折墙。
膜材通孔11与定位结构21的间隙设置在0.15~0.5mm。光学膜材1的通孔11和背板框架2的定位结构21还可以相应的有两个或多个。光学膜材1为扩散板、扩散片、增光片中的一种或几种。液晶背光模组可采用LED或CCFL（冷阴极管）作为光源。
实施例二
如图4所示，本实施例与实施例一的区别在于，所述通孔11的上部为窄部112，所述通孔11的下部为宽部111，所述窄部112为第一长方形和第一半圆形的组合，所述第一半圆形在所述第一长方形的上端，宽部111为第二长方形和第二半圆形的组合，所述第二半圆形在所述第二长方形一侧。
实施例三
如图5所示，本实施例与实施例一的区别在于，所述通孔11的上部为窄部112，所述通孔11的下部为宽部111，窄部112为第一长方形，宽部111为第二长方形和第二半圆形的组合，所述第二半圆形在所述第二长方形一侧。
本专利申请并不限定膜材通孔11和定位结构21的数量以及设置的具体位置等。并且，背板框架2的定位结构21与膜材1接触的地方不可有毛刺等不良。
本专利申请已由上述相关实施例加以描述，然而上述实施例仅为实施本专利申请的范例。必需指出的是，已公开的实施例并未限制本专利申请的范围。相反地，包含于权利要求书的精神及范围的修改及均等设置均包括于本专利申请的范围内。
 本发明的实施方式
工业实用性
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Claims (15)

  1. 一种液晶背光模组，其特征在于：包含光学膜材和背板框架，光学膜材放置在背板框架上，光学膜材的边缘设置有至少一个通孔，所述通孔包括宽部和窄部，背板框架设置有至少一个定位结构，所述定位结构为一凸起件，所述凸起件的横截面呈倒L形，光学膜材由通孔的宽部放入背板框架的定位结构，然后平移至窄部，所述凸起件的上部结构卡在光学膜材的背面；所述通孔与所述凸起件的间隙为0.15~0.5mm；所述凸起件为经冲切和对上部进行弯折而形成的折墙；所述光学膜材为扩散板、扩散片、增光片中的一种或几种；所述通孔为L形或b形。
  2. 一种液晶背光模组，其特征在于：包含光学膜材和背板框架，光学膜材放置在背板框架上，光学膜材的边缘设置有至少一个通孔，背板框架设置有至少一个定位结构，所述通孔与所述定位结构卡接。
  3. 根据权利要求2所述的液晶背光模组，其特征在于：所述通孔包括宽部和窄部，所述定位结构为一凸起件，所述凸起件的横截面呈倒L形，光学膜材由通孔的宽部放入背板框架的定位结构，然后平移至窄部，所述凸起件的上部结构卡在光学膜材的背面。
  4. 根据权利要求3所述的液晶背光模组，其特征在于：所述通孔的上部为窄部，所述通孔的下部为宽部，宽部和窄部均为长方形，宽部的宽度大于窄部的宽度。
  5. 根据权利要求3所述的液晶背光模组，其特征在于：所述通孔的上部为窄部，所述通孔的下部为宽部，所述窄部为第一长方形和第一半圆形的组合，所述第一半圆形在所述第一长方形的上端，宽部为第二长方形和第二半圆形的组合，所述第二半圆形在所述第二长方形一侧。
  6. 根据权利要求3所述的液晶背光模组，其特征在于：所述通孔的上部为窄部，所述通孔的下部为宽部，窄部为第一长方形，宽部为第二长方形和第二半圆形的组合，所述第二半圆形在所述第二长方形一侧。
  7. 根据权利要求2所述的液晶背光模组，其特征在于：所述通孔与所述定位结构的间隙为0.15~0.5mm。
  8. 根据权利要求2所述的液晶背光模组，其特征在于：所述凸起件为经冲切和对上部进行弯折而形成的折墙。
  9. 根据权利要求2所述的液晶背光模组，其特征在于：所述光学膜材为扩散板、扩散片、增光片中的一种或几种。
  10. 一种膜材背板组件，其特征在于：包含光学膜材和背板框架，光学膜材放置在背板框架上，光学膜材的边缘设置有至少一个通孔，背板框架设置有至少一个定位结构，所述通孔与所述定位结构卡接。
  11. 根据权利要求10所述的膜材背板组件，其特征在于：所述通孔包括宽部和窄部，所述定位结构为一凸起件，所述凸起件的横截面呈倒L形，光学膜材由通孔的宽部放入背板框架的定位结构，然后平移至窄部，所述凸起件的上部结构卡在光学膜材的背面。
  12. 根据权利要求11所述的膜材背板组件，其特征在于：所述通孔的上部为窄部，所述通孔的下部为宽部，宽部和窄部均为长方形，宽部的宽度大于窄部的宽度。
  13. 根据权利要求11所述的膜材背板组件，其特征在于：所述通孔的上部为窄部，所述通孔的下部为宽部，所述窄部为第一长方形和第一半圆形的组合，所述第一半圆形在所述第一长方形的上端，宽部为第二长方形和第二半圆形的组合，所述第二半圆形在所述第二长方形一侧。
  14. 根据权利要求11所述的膜材背板组件，其特征在于：所述通孔的上部为窄部，所述通孔的下部为宽部，窄部为第一长方形，宽部为第二长方形和第二半圆形的组合，所述第二半圆形在所述第二长方形一侧。
  15. 根据权利要求10所述的膜材背板组件，其特征在于：所述凸起件为经冲切和对上部进行弯折而形成的折墙。
PCT/CN2011/074769 2011-05-17 2011-05-27 一种液晶背光模组及膜材背板组件 WO2012155362A1 (zh)

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