WO2016106898A1 - 胶框、背光模组以及液晶面板 - Google Patents

胶框、背光模组以及液晶面板 Download PDF

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Publication number
WO2016106898A1
WO2016106898A1 PCT/CN2015/071201 CN2015071201W WO2016106898A1 WO 2016106898 A1 WO2016106898 A1 WO 2016106898A1 CN 2015071201 W CN2015071201 W CN 2015071201W WO 2016106898 A1 WO2016106898 A1 WO 2016106898A1
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WO
WIPO (PCT)
Prior art keywords
frame
light
backlight module
shielding tape
guide plate
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PCT/CN2015/071201
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English (en)
French (fr)
Inventor
刘中杰
谢晨
Original Assignee
深圳市华星光电技术有限公司
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Publication of WO2016106898A1 publication Critical patent/WO2016106898A1/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
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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 invention relates to a liquid crystal display technology, in particular to a plastic frame, a backlight module and a liquid crystal panel.
  • FIG. 1 shows a prior art liquid crystal panel 100 for screen narrow bezel technology.
  • the liquid crystal panel 100 includes a backlight module and a liquid crystal panel 2 attached to the backlight module.
  • the backlight module includes a light guide plate 4, an optical film group 3 covering the light-emitting surface of the light guide plate 4, a light bar (not shown) attached to one side of the light guide plate 4, surrounding the light guide plate 4, and the light bar And a plastic frame 1 of the optical film group 3, and a light-shielding tape 5 which is adhered to the plastic frame 1 and the optical film group 3 and has the other surface adhered to the liquid crystal panel 2.
  • the light emitted from the light bar enters the light guide plate 4 from the side of the light guide plate 2, is refracted, is emitted from the light exit surface of the light guide plate 4, passes through the optical film group 3, and is incident on the liquid crystal panel 2.
  • the liquid crystal panel 2 displays graphics and colors by modulating the light emitted by the backlight module. Since the light-shielding tape 5 is opaque, the plastic frame 1 is opaque or the light transmittance of the plastic frame 1 is very low, so that a frame that cannot emit light is formed on the outer edge of the backlight module.
  • the liquid crystal panel 100 can be mounted into a housing (not shown) of the product, which can be a cell phone or a tablet.
  • the outer peripheral wall of the plastic frame 1 abuts against the housing, and the plastic frame 1 is generally made of a flexible material, so that the impact of the housing on the liquid crystal panel 100 can be buffered.
  • One use of the light-shielding tape 5 is to fix the plastic frame 1 and the liquid crystal screen 2 to each other, and another purpose is to block a portion of the light that is directed toward the edge of the liquid crystal panel 2 to avoid forming a brightness at the edge of the liquid crystal screen 2 that is significantly higher than other portions. Bright line.
  • the border of the backlight module is getting narrower and narrower.
  • the width of the side pillar of the plastic frame 1 is reduced.
  • the minimum width of the side pillar of the plastic frame can be 0.4 mm, and correspondingly, the area of contact between the plastic frame 1 and the light shielding tape 5 is reduced, thereby causing the plastic frame 1 and the light shielding.
  • the adhesive force of the tape 5 is reduced.
  • the prior art generally employs a means of replacing the light-shielding tape 5 having a higher adhesion ability to complement the adhesive force, but the price of such a light-shielding tape 5 is generally high.
  • the plastic frame 1 when the width of the side post of the plastic frame 1 is reduced to 3 mm, since the width of the side post is very small, the plastic frame 1 and the shading The maximum assembly error between the tapes 5 is up to 30% of the width of the side posts. It is difficult for the plastic frame and the light-shielding tape to be accurately aligned according to the design requirements, which may cause the light-shielding tape 5 not to be attached to the side pillar of the plastic frame 1 so that a gap capable of transmitting light is generated between the side pillar and the light-shielding tape 5, thereby being on the liquid crystal screen. The edge of 2 produces a bright line phenomenon, thereby reducing the yield of the backlight module or the liquid crystal panel 100.
  • the technical problem to be solved by the invention is the problem of insufficient adhesion between the plastic frame and the light-shielding tape under the screen narrow frame technology, and it is also desired to weaken the assembly error band between the plastic frame and the light-shielding tape under the narrow frame technology of the screen. The impact of the coming, the pass rate of the backlight module is increased.
  • the present application provides a plastic frame, comprising: a frame, the frame includes a first end surface for attaching the light shielding tape; and a convex portion protruding radially inward from the inner surface of the frame, wherein The first side of the convex portion near the first end surface is flush with the first end surface.
  • the thickness of the raised portion is less than the thickness of the frame.
  • the first side is for applying a light-shielding tape
  • the top end of the raised portion does not extend beyond the boundary of the light-shielding tape
  • the frame is a rectangular frame and the raised portions are disposed at least on the opposite side posts of the frame.
  • a backlight module which comprises the above-mentioned plastic frame.
  • the backlight module further includes a light guide plate, and the frame is disposed on the light guide plate, and the light emitting surface of the light guide plate abuts against the second side of the convex portion opposite to the first side.
  • the light guide plate includes a back surface opposite to the light exit surface
  • the frame includes a second end surface opposite the first end surface
  • the back surface is flush with the second end surface
  • the backlight module further includes an optical film set disposed on the light-emitting surface, the top end of the convex portion abuts the side of the optical film group, and the thickness of the convex portion is equal to the optical film group thickness.
  • the backlight module further includes a light-shielding tape
  • the light-shielding tape is configured as a rectangular frame in a sheet shape, and the four sides of the light-shielding tape are spanned by the plastic frame and the optical film group.
  • liquid crystal panel comprising the above-mentioned plastic frame or the above backlight module.
  • the first side of the convex portion can also be used for attaching the light-shielding tape, thereby increasing the contact area between the plastic frame and the light-shielding tape, thereby increasing the adhesion between the light-shielding tape and the plastic frame, so that the light-shielding tape can be more firmly Attached to the frame.
  • the assembly difficulty between the plastic frame and the light-shielding tape is reduced correspondingly, and the influence of the assembly error is weakened, thereby improving the qualification of the backlight module or the liquid crystal panel. rate.
  • Figure 1 shows a schematic cross-sectional view of a conventional liquid crystal panel
  • Figure 2 shows a schematic perspective view of a plastic frame in accordance with the present invention
  • Figure 3 shows a partial enlarged view of a portion A in Figure 2;
  • Figure 4 shows a schematic cross-sectional view of the plastic frame of Figure 2;
  • Figure 5 shows a schematic perspective view of the first side post of Figure 2;
  • FIG. 6 shows a schematic disassembly diagram of a backlight module in accordance with the present invention
  • Figure 7 shows a schematic cross-sectional view of a liquid crystal panel in accordance with the present invention.
  • Figure 8 shows a schematic perspective view of the light bar of Figure 6.
  • the frame 10 is typically made of a flexible material, preferably a PC material (i.e., polycarbonate).
  • the plastic frame 10 includes a frame 11 and a boss 12 disposed in the frame 11.
  • the frame 11 has a substantially rectangular frame structure.
  • the frame 11 includes four side columns 11a, 11b, 11c, and 11d each constituting four rectangular sides, and the four side columns are connected end to end.
  • the four side columns are all in the same plane.
  • the plastic frame 10 includes a first end surface 13 (shown in FIG. 4) for attaching the light shielding tape 50.
  • the plastic frame 10 further includes a second end surface 16 disposed opposite the first end surface 13.
  • the boss 12 is provided on the inner surface of the frame 11 and protrudes radially inward from the inner surface of the frame 11, i.e., the boss 12 is disposed on the side of the side post facing inward.
  • the raised portion 12 includes a first side 14 adjacent the first end face 13.
  • the first side 14 is flush with the first end face 13.
  • the raised portion 12 also includes a second side 15 that is opposite the first side 14.
  • the thickness of the boss 12 is smaller than the thickness of the frame 11, that is, the distance between the first side 14 to the second side 15 is smaller than the distance between the first end face 13 to the second end face 16.
  • the second side 15 and the inner wall of the frame 11 enclose a cavity for mounting the light guide plate 40.
  • the first side surface 14 of the convex portion 12 is flush with the first end surface 13 of the frame 11, so that the first side surface 14 of the convex portion 12 can also be affixed with the light shielding tape 50, thus increasing the plastic frame 10 and the light shielding tape 50.
  • the contact area thereby increasing the adhesion between the light-shielding tape 50 and the bezel 10, allows the light-shielding tape 50 to adhere more firmly to the bezel 10.
  • the assembly difficulty between the plastic frame 10 and the light-shielding tape 50 is correspondingly reduced, and the plastic frame 10 and the light-shielding tape 50 overlap at the convex portion 12, so that Can reduce or even eliminate the plastic frame
  • the possibility of creating a gap between the 10 and the light-shielding tape 50 can improve the yield of the backlight module when mounted on the backlight module.
  • FIG. 6 shows a backlight module in accordance with the present invention.
  • the backlight module includes the above-mentioned plastic frame 10 provided with the convex portion 12, the light guide plate 40 disposed in the plastic frame 10, and the light bar 70 disposed at one end of the light guide plate 40.
  • the light guide plate 40 is made of a transparent material.
  • the refractive index of the transparent material is generally higher than the refractive index of air.
  • the transparent material can be an optical grade polycarbonate or polymethyl methacrylate.
  • the light guide plate 40 has a substantially rectangular plate-like structure.
  • One plate surface of the light guide plate 40 is a light exit surface 41 (as shown in FIG. 7), and the other plate surface, that is, a surface opposite to the light exit surface 41, is a back surface 42. Except for the back surface 42, other surfaces of the light guide plate 40, such as the respective outer side surfaces and the light exit surface 41, are very smooth. Portions of the back side 42 of the light guide plate 40 project outwardly to form dense reflective dots.
  • One side of the light guide plate 40 is a light incident surface of the light guide plate 40.
  • the four side columns of the frame 11 are named as the first side column 11a, the second side column 11b, the third side column 11c, and the fourth side column 11d.
  • the inner side of the first end surface 13 of the first side post 11a is recessed to form a positioning portion 18 for fitting the light bar 70.
  • the boss portion 12 is provided at least on any one of the second side pillars 11b, the third side pillars 11c, and the fourth side pillars 11d. More preferably, the boss 12 is provided at least on the second side post 11b and the fourth side post 11d.
  • the frame 11 of the plastic frame 10 is disposed on the light guide plate 40.
  • the four side posts are respectively parallel to the four sides of the light guide plate 40.
  • the first side pillar 11a is adjacent to the light incident surface of the light guide plate 40 and parallel to the light incident surface. .
  • the light exit surface 41 of the light guide plate 40 abuts against the second side surface 15 of the boss portion 12.
  • the distance between the first side pillar 11a and the third side pillar 11c is larger than the length of the light guide plate 40.
  • the light bar 70 includes a substantially strip-shaped bottom plate 71, and a plurality of light-emitting elements 72 fixed to the bottom plate 71.
  • the bottom plate 71 may be a flexible printed circuit board (ie, a flexible printed circuit board).
  • Light emitting element 72 can be a light emitting diode. These light emitting elements 72 are spaced apart from one another.
  • the light-emitting elements 72 are evenly distributed on the same side of the bottom plate 71 along the extending direction of the bottom plate 71, and are perpendicular to the bottom plate 71.
  • the light-emitting portion 73 of the light-emitting element 72 is located on the side of the light-emitting element 72.
  • These illuminating places 73 are oriented in the same direction, and this direction is perpendicular to the extending direction of the bottom plate 72.
  • the bottom plate 71 can be capped on the positioning portion 18 of the first side post 11a such that the light emitting element 72 is inserted into the fitting groove between the bezel 10 and the light guide plate 40, and the light emitting portion 73 faces the light guide plate 40.
  • the glossy side Into the glossy side.
  • the light emitted from the light-emitting element 72 can enter the light guide plate 40 through the light-incident surface, and then be reflected from the light-emitting surface 41 after being reflected one or more times.
  • one of the light rays is reflected by the one or more reflections inside the light guide plate 40 to a reflective mesh point disposed on the back surface 42 of the light guide plate 40.
  • Each reflective dot can scatter light that strikes its surface. Part of the scattered light hits the illuminating surface 41, and its incident angle on the light exit surface 41 is smaller than the critical angle. Thereby, this part of the scattered light is emitted from the light exit surface 41 to the light guide plate 40.
  • the bezel 10 further includes a plurality of bosses 19 disposed on the inner surface of the positioning portion 18 of the first side post 11a. These bosses 19 are spaced apart from each other and evenly distributed along the first side pillars 11a. After the plastic frame 10 is assembled on the light guide plate 40, the top end of the boss 19 abuts on the light incident surface of the rail plate, and a plurality of mounting grooves are formed between the adjacent bosses 19. After the light bar 70 is assembled to the bezel 10, each of the light-emitting elements 72 is inserted into its corresponding fitting groove. Thus, the boss 19 supports the light guide plate 40 to prevent the light guide plate 40 from pressing the light emitting element 72. In addition, when the plastic frame 10 is subjected to an impact, the boss 19 can also serve as a buffer.
  • the raised portion 12 is configured in the shape of a strip. Both ends of the boss 12 extend to both ends of the side column where they are located. The raised portion 12 evenly blocks light along the side post.
  • the second side pillar 11b, the third side pillar 11c, and the fourth side pillar 11d are each provided with a strip-shaped convex portion 12. In this way, the three side columns can increase the area of contact with the light-shielding tape 50, and greatly improve the pass rate of the backlight module.
  • the light guide plate 40 includes a back surface 42 opposite the light exit surface 41, and the back surface 42 is flush with the second end surface 16 of the frame 11.
  • the backlight module further includes a reflective sheet 60 bonded to the back surface 42 of the light guide plate 40.
  • the reflection sheet 60 can be made, for example, of polyethylene terephthalate.
  • the reflective sheet 60 is opaque and its surface can be reflective. Therefore, the reflection sheet 60 can reflect the light emitted from the back sheet to the light guide plate 40 back to the light guide plate 40. More preferably, each edge of the reflective sheet 60 overlaps with each of the side posts of the bezel 10.
  • the light that exits the light guide plate 40 from the back surface 42 does not emit the backlight module along the outside of the reflection sheet 60, thereby preventing the utilization of light in the light guide plate 40 from being lowered.
  • the backlight module further includes an optical film set 30 disposed on the light exit surface 41 of the light guide plate 40.
  • the optical film set 30 has a rectangular shape.
  • the frame 10 surrounds the optical film set 30, and the side legs of the frame 11 are parallel to the side of the optical film set 30 adjacent thereto.
  • the top end of the raised portion 12 abuts against the side of the optical film set 30 to position the optical film set 30.
  • the thickness of the optical film set 30 is set equal to the thickness of the raised portion 12.
  • the optical film set 30 is preferably configured to abut against the side of the bottom plate 71.
  • the optical film set 30 includes a diffusion sheet 31, a lower prism sheet 32, and an upper prism sheet 33 which are sequentially stacked.
  • the diffusion sheet 31 can be bonded to the light exit surface 41.
  • the backlight module further includes a light shielding tape 50.
  • the light shielding tape 50 is a double-sided tape.
  • the light-shielding tape 50 can be constructed as a sheet-shaped rectangular frame. The four sides of the light-shielding tape 50 are bridged between the plastic frame 10 and the optical film set 30.
  • the first end face 13 of the first side post 11a, the bottom surface of the bottom plate 71 facing away from the plate surface of the light-emitting element 72, and the optical film set 30 face away from the plate surface of the light guide plate 40 are attached to one side of the light-shielding tape 50.
  • the light-shielding tape 50 can at least overlap with the bosses 12 on the second side post 11b, the third side post 11c, and the fourth side post 11d to avoid a bright line phenomenon.
  • the side of the light-shielding tape 50 facing away from the plastic frame 10 is used to affix the display screen 20.
  • the light-shielding tape 50 is preferably a black and white glue, and one side of the black and white glue is attached to the plastic frame 10.
  • the inner side of the light-shielding tape 50 is adhered to the optical film, that is, the top end of the convex portion 12 does not extend beyond the boundary of the light-shielding tape 50.
  • the light-shielding tape 50 can press against the edge of the optical film to prevent the edge of the optical film from warping. Further, the tip end of the boss portion 12 does not protrude beyond the boundary of the light-shielding tape 50, so that the edge of the display region of the liquid crystal panel does not become dark and become small.
  • a liquid crystal panel 200 can also be obtained in accordance with the present invention.
  • the liquid crystal panel 200 includes the above-mentioned plastic frame 10 or a backlight module in which the above-mentioned plastic frame 10 is mounted.
  • Such a liquid crystal panel 200 has a low manufacturing cost and a high yield.

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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)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

一种胶框(10)、背光模组以及液晶面板(200)，胶框(10)包括：框架(11)，框架(11)包括用于粘贴遮光胶带(50)的第一端面(13)；以及从框架(11)的内表面径向向内凸出的凸起部(12)，凸起部(12)靠近第一端面(13)的第一侧面(14)与第一端面(13)平齐。这种胶框(10)用于粘接遮光胶带(50)时，胶框(10)与遮光胶带(50)的接触面积较大，胶框(10)和遮光胶带(50)之间的粘合力更大。同时，还提升了背光模组的合格率。

Description

胶框、背光模组以及液晶面板
相关申请的交叉引用
本申请要求享有于2014年12月31日提交的名称为“胶框、背光模组以及液晶面板”的中国专利申请CN20140856628.1的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本发明涉及一种液晶显示技术，特别涉及一种胶框、背光模组以及液晶面板。
背景技术
图1显示了一种现有的且用于屏幕窄边框技术的液晶面板100。该液晶面板100包括背光模组以及粘贴在背光模组上的液晶屏2。
背光模组包括导光板4、覆盖在导光板4的出光面上的光学膜片组3，贴合在导光板4的一个侧面上的灯条(未示出)，环绕导光板4、灯条和光学膜片组3的胶框1，以及一面粘贴在胶框1和光学膜片组3上的、且另一面粘贴在液晶屏2上的遮光胶带5。灯条发出的光线从导光板2的侧面射入导光板4，经折射后从导光板4的出光面射出并穿过光学膜片组3后射入到液晶屏2。液晶屏2通过对背光模组发出的光线进行调制来显示出图形和色彩。由于遮光胶带5不透光，胶框1不透光或胶框1的透光率非常低，从而在该背光模组的外缘形成不能射出光线的边框。
该液晶面板100可以安装到产品的壳体(未示出)内，该产品可以为手机或平板电脑。胶框1的外周壁与壳体相抵接，胶框1一般由挠性材料制成，这样就可以缓冲壳体对液晶面板100的冲击。遮光胶带5的一个用途是将胶框1和液晶屏2相互固定，另一个用途是用来遮挡住部分射向液晶屏2边缘的光线以避免在液晶屏2的边缘形成亮度明显高于其他部分的亮线。
随着屏幕窄边框技术的发展，背光模组的边框越来越窄。胶框1的侧柱的宽度减小，目前，胶框的侧柱的最小宽度可达0.4mm，对应地，胶框1与遮光胶带5接触的面积减小，由此导致胶框1与遮光胶带5的粘合力减小。现有技术一般采用更换具有更高粘附能力的遮光胶带5的手段来补足粘合力，但这种遮光胶带5的价格通常较高。
另外，胶框1的侧柱的宽度减小到3mm时，由于侧柱的宽度非常小，胶框1与遮光 胶带5之间最大的装配误差可达侧柱宽度的30％。胶框与遮光胶带难以按设计要求准确对齐，这样可能导致遮光胶带5没有粘贴到胶框1的侧柱上，以至于侧柱与遮光胶带5之间产生可以透光的缝隙，从而在液晶屏2的边缘产生亮线现象，由此降低了背光模组或液晶面板100的合格率。
发明内容
本发明所要解决的技术问题是屏幕窄边框技术下的胶框和遮光胶带之间的粘合力不足的问题，另外还希望削弱屏幕窄边框技术下的胶框和遮光胶带之间的装配误差带来的影响，使背光模组的合格率升高。
为了解决上述技术问题，本申请提供了一种胶框，包括：框架，框架包括用于粘贴遮光胶带的第一端面；以及从框架的内表面径向向内凸出的凸起部，其中，凸起部靠近第一端面的第一侧面与第一端面平齐。
在一个具体的实施例中，凸起部的厚度小于框架的厚度。
在一个具体的实施例中，第一侧面用于粘贴遮光胶带，凸起部的顶端不伸过遮光胶带的边界。
在一个具体的实施例中，框架为矩形框，凸起部至少设置在框架相对的两条侧柱上。
根据本发明还提供了一种背光模组，其包上述的胶框。
在一个具体的实施例中，背光模组还包括导光板，框架套装在导光板上，导光板的出光面抵接于凸起部的与第一侧面相对的第二侧面。
在一个具体的实施例中，导光板包括与出光面相对的背面，框架包括与第一端面相对的第二端面，背面与第二端面平齐。
在一个具体的实施例中，背光模组还包括设置在出光面上的光学膜片组，凸起部的顶端抵接于光学膜片组的侧面，凸起部的厚度等于光学膜片组的厚度。
在一个具体的实施例中，背光模组还包括遮光胶带，遮光胶带构造成呈片状的矩形框，遮光胶带的四条边均跨接胶框和光学膜片组。
根据本发明还提供了一种液晶面板，液晶面板包括上述胶框或上述背光模组。
凸起部的第一侧面也可用于粘贴遮光胶带，这样就增大了胶框与遮光胶带的接触面积，由此增加遮光胶带与胶框之间的粘合力，使得遮光胶带可以更牢固地附着在胶框上。另外，增大胶框与遮光胶带的接触面积后，相应地减小了胶框与遮光胶带之间的装配难度，削弱了装配误差带来的影响，从而提高了背光模组或液晶面板的合格率。本发明的其它特征和优点将在随后的说明书中阐述。
附图说明
在下文中将基于实施例并参考附图来对本发明进行更详细的描述。其中：
图1显示了一种现有的液晶面板的示意性剖视图；
图2显示了根据本发明的一种胶框的示意性立体图；
图3显示了图2中A部分的局部放大图；
图4显示了图2中的胶框的示意性剖视图；
图5显示了图2中第一侧柱的示意性立体图；
图6显示了根据本发明的一种背光模组的示意性拆解图；
图7显示了根据本发明的一种液晶面板的示意性剖视图；
图8显示了图6中的灯条的示意性立体图。
在附图中，相同的部件使用相同的附图标记。附图并未按照实际的比例绘制。
具体实施方式
下面将结合附图对本发明作进一步说明。
图2至图5示意性地显示了一种胶框的结构。胶框10一般由挠性材料制成，该挠性材料优选为PC材料(即聚碳酸酯)。胶框10包括框架11和设置在框架11内的凸起部12。
如图2所示，框架11为大致的矩形框结构。框架11包括分别构成四条矩形边的四根侧柱11a、11b、11c、11d，四根侧柱首尾相接。四根侧柱均位于同一平面内。胶框10包括第一端面13(如图4所示)，第一端面13用于粘贴遮光胶带50。胶框10还包括与第一端面13相对设置的第二端面16。
如图3所示，凸起部12设置在框架11的内表面上，并从框架11的内表面径向向内凸出，即凸起部12设置在侧柱朝内的侧面上。
如图4所示，凸起部12包括靠近第一端面13的第一侧面14。第一侧面14与第一端面13平齐。凸起部12还包括与第一侧面14相对的第二侧面15。凸起部12的厚度小于所述框架11的厚度，即第一侧面14到第二侧面15之间的距离小于第一端面13到第二端面16之间的距离。这样，第二侧面15和框架11的内壁围合成一个用于安装导光板40的空腔。
凸起部12的第一侧面14与框架11的第一端面13平齐，从而凸起部12的第一侧面14也可以粘贴遮光胶带50，这样就增大了胶框10与遮光胶带50的接触面积，由此增加遮光胶带50与胶框10之间的粘合力，使得遮光胶带50可以更牢固地附着在胶框10上。另外，增大胶框10与遮光胶带50的接触面积后，相应地减小了胶框10与遮光胶带50之间的装配难度，胶框10与遮光胶带50在凸起部12处重叠，这样可以减少甚至消除胶框 10与遮光胶带50之间产生间隙的可能性，被安装到背光模组上时可以提高了背光模组的合格率。
图6显示了根据本发明的一种背光模组。这种背光模组包括上述的设置有凸起部12的胶框10、设置在胶框10内的导光板40以及设置在导光板40一端的灯条70。
导光板40由透明材料制成。该透明材料的折射率通常高于空气的折射率。该透明材料可以是光学级的聚碳酸酯或聚甲基丙烯酸甲酯。导光板40为大致矩形的板状结构。导光板40的一个板面为出光面41(如图7所示)，另一板面、即与出光面41相对的面为背面42。除背面42外，导光板40的其它表面，例如各个外侧面、出光面41均非常光滑。导光板40的背面42上的一些部分向外凸出，从而形成密集的反光网点。导光板40的一个侧面为导光板40的入光面。
为了便于描述，将框架11的四根侧柱命名为第一侧柱11a、第二侧柱11b、第三侧柱11c和第四侧柱11d。如图5所示，第一侧柱11a的第一端面13的内侧凹陷形成定位部18，定位部18用于装配灯条70。凸起部12至少设置在第二侧柱11b、第三侧柱11c和第四侧柱11d中任意一根侧柱上。更优选地，凸起部12至少设置在第二侧柱11b和第四侧柱11d上。
胶框10的框架11套装在导光板40上，四根侧柱分别平行于导光板40的四个侧面，其中，第一侧柱11a靠近导光板40的入光面且平行于该入光面。导光板40的出光面41抵接于凸起部12的第二侧面15。第一侧柱11a与第三侧柱11c之间的距离大于导光板40的长度。将胶框10套装到导光板40上后，第一侧柱11a与导光板40的入光面之间形成装配槽，其余三根侧柱分别对应贴合于导光板40余下的三个侧面。装配槽用于装配灯条70。在这里，凸起部12还起到定位的作用，更方便胶框10与导光板40之间的装配。
如图8所示，灯条70包括大致条状的底板71，以及固定在底板71上的若干发光元件72。底板71可以是柔性电路板(即flexible printed circuit board)。发光元件72可以是发光二极管。这些发光元件72彼此间隔开。发光元件72沿底板71的延伸方向均匀地分布在底板71的同一侧，且垂直于底板71。发光元件72的发光处73位于发光元件72的侧面。这些发光处73朝向相同的方向，且该方向垂直于底板72的延伸方向。装配灯条70时，底板71可以盖合在第一侧柱11a的定位部18上，使得发光元件72***胶框10和导光板40之间的装配槽内，并且发光处73朝向导光板40的入光面。
这样，发光元件72发出的光线可以穿过该入光面射入导光板40内，然后经一次或多次反射后从出光面41射出。尤其是，发光元件发出的光线穿过入光面后，其中一部光线在导光板40内部经过一次或多次反射反射到设置在导光板40的背面42上的反射网点。每个反射网点可以将射到其表面上的光线散射出去。一部分所散射的光线射向出光面 41，并且其在出光面41上的入射角小于临界角。由此，这部分散射光线从出光面41射出导光板40。
在一个实施例中，如图5所示，胶框10还包括设置在第一侧柱11a的定位部18的内表面上的若干凸台19。这些凸台19彼此间隔开来，并沿第一侧柱11a均匀分布。胶框10装配到导光板40上后，凸台19的顶端抵接于导轨板的入光面，相邻凸台19之间形成若干个装配槽。将灯条70装配到胶框10上后，每个发光元件72***与其相应的装配槽内。这样凸台19支撑导光板40，以防止导光板40挤压发光元件72。另外，胶框10受到冲击时，凸台19还可以起到缓冲作用。
在一个实施例中，凸起部12构造为条形。凸起部12的两端分别延伸至其所在侧柱的两端。该凸起部12沿该侧柱均匀地遮挡光线。优选地，第二侧柱11b、第三侧柱11c、第四侧柱11d均设置有条形的凸起部12。这样，三条侧柱均可增加与遮光胶带50接触的面积，极大的提高背光模组的合格率。
在一个实施例中，导光板40包括与所述出光面41相对的背面42，背面42与框架11的第二端面16平齐。这样，第二端面16和背面42形成一个平整的承载面，使得胶框10和导光板40受力均匀。优选地，背光模组还包括粘接在导光板40的背面42上的反射片60。反射片60例如可以由聚对苯二甲酸乙二醇酯制成。反射片60不透光，且其表面可以反光。因此，反射片60可以将从背板射出导光板40的光线反射回导光板40。更优选地，反射片60的各个边缘对应与胶框10的各根侧柱重叠。这样，从背面42射出导光板40的光线不会沿反射片60的外侧射出背光模组，从而避免导光板40中的光线的利用率降低。
在一个实施例中，背光模组还包括设置在所述导光板40的出光面41上的光学膜片组30。光学膜片组30呈矩形。胶框10环绕光学膜片组30，框架11的各条侧柱平行于其所靠近光学膜片组30的边。凸起部12的顶端抵接于光学膜片组30的侧面以定位光学膜片组30。优选地，光学膜片组30的厚度设置成等于凸起部12的厚度。光学膜片组30优选构造成与底板71的侧面相抵接。在一个例子中，光学膜片组30包括依次层叠的扩散片31、下棱镜片32和上棱镜片33。扩散片31可与出光面41粘接。
在一个实施例中，背光模组还包括遮光胶带50。遮光胶带50为双面胶。遮光胶带50可构造为片状的矩形框。遮光胶带50的四条边均跨接胶框10和光学膜片组30。其中，遮光胶带50的一条边粘贴第一侧柱11a的第一端面13、底板71背离发光元件72的板面、光学膜片组30背离导光板40的板面。这样遮光胶带50在粘贴胶框10时，遮光胶带50至少可以与第二侧柱11b、第三侧柱11c和第四侧柱11d上的凸起部12形成重叠，以避免出现亮线现象。遮光胶带50的背离胶框10的一面用于粘贴显示屏20。遮光胶带50优选为黑白胶，黑白胶白的一面粘贴到胶框10上。
优选地，遮光胶带50的内边均粘贴在光学膜片上，即凸起部12的顶端不伸过所述遮光胶带50的边界。遮光胶带50可以压住光学膜片的边缘，避免光学膜片的边缘翘曲。另外，凸起部12的顶端不伸出遮光胶带50的边界，这样就不会造成液晶屏的显示区的边缘变暗变小。
如图7所示，根据本发明还可获得一种液晶面板200。液晶面板200包括上述胶框10或安装有上述胶框10的背光模组。这种液晶面板200的制造成本低且合格率高。
虽然已经参考优选实施例对本发明进行了描述，但在不脱离本发明的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本发明并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (10)

  1. 一种用于背光模组的胶框，包括：
    框架，所述框架包括用于粘贴遮光胶带的第一端面；以及
    从所述框架的内表面径向向内凸出的凸起部，
    其中，凸起部靠近所述第一端面的第一侧面与所述第一端面平齐。
  2. 根据权利要求1所述的胶框，其中，所述凸起部的厚度小于所述框架的厚度。
  3. 根据权利要求2所述的胶框，其中，所述第一侧面用于粘贴所述遮光胶带，所述凸起部的顶端不伸过所述遮光胶带的边界。
  4. 根据权利要求3所述的胶框，其中，所述框架为矩形框，所述凸起部至少设置在所述框架相对的两条侧柱上。
  5. 一种背光模组，其中，包括胶框，所述胶框包括
    框架，所述框架包括用于粘贴遮光胶带的第一端面；以及
    从所述框架的内表面径向向内凸出的凸起部，
    其中，凸起部靠近所述第一端面的第一侧面与所述第一端面平齐，所述凸起部的厚度小于所述框架的厚度。
  6. 根据权利要求5所述的背光模组，其中，所述背光模组还包括导光板，所述框架套装在所述导光板上，所述导光板的出光面抵接于所述凸起部的与第一侧面相对的第二侧面。
  7. 根据权利要求6所述的背光模组，其中，所述导光板包括与所述出光面相对的背面，所述框架包括与所述第一端面相对的第二端面，所述背面与所述第二端面平齐。
  8. 根据权利要求6所述的背光模组，其中，所述背光模组还包括设置在所述出光面上的光学膜片组，所述凸起部的顶端抵接于所述光学膜片组的侧面，所述凸起部的厚度等于所述光学膜片组的厚度。
  9. 根据权利要求8所述的背光模组，其中，所述背光模组还包括所述遮光胶带，所述遮光胶带构造成呈片状的矩形框，所述遮光胶带的四条边均跨接所述胶框和所述光学膜片组。
  10. 一种液晶面板，其中，所述液晶面板包括胶框，所述胶框包括
    框架，所述框架包括用于粘贴遮光胶带的第一端面；以及
    从所述框架的内表面径向向内凸出的凸起部，
    其中，凸起部靠近所述第一端面的第一侧面与所述第一端面平齐，所述凸起部的厚度小于所述框架的厚度。
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CN101458420A (zh) * 2007-12-12 2009-06-17 群康科技(深圳)有限公司 背光模组和液晶显示装置
CN201576147U (zh) * 2009-08-10 2010-09-08 浙江新力光电科技有限公司 液晶显示模组遮光胶带结构
CN102402038A (zh) * 2011-11-29 2012-04-04 深圳市华星光电技术有限公司 液晶显示模组的制造方法及液晶显示模组

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CN112965283A (zh) * 2021-03-15 2021-06-15 京东方科技集团股份有限公司 背板组件及其制造方法、背光模组、显示面板
CN112965283B (zh) * 2021-03-15 2023-12-15 京东方科技集团股份有限公司 背板组件及其制造方法、背光模组、显示面板
CN114292600A (zh) * 2021-12-29 2022-04-08 金贵菊 一种复合胶带及其制备方法

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