WO2015110013A1 - 一种光学膜片的定位装置 - Google Patents

一种光学膜片的定位装置 Download PDF

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Publication number
WO2015110013A1
WO2015110013A1 PCT/CN2015/071226 CN2015071226W WO2015110013A1 WO 2015110013 A1 WO2015110013 A1 WO 2015110013A1 CN 2015071226 W CN2015071226 W CN 2015071226W WO 2015110013 A1 WO2015110013 A1 WO 2015110013A1
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WO
WIPO (PCT)
Prior art keywords
positioning
optical film
hole
positioning hole
longitudinal
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Ceased
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PCT/CN2015/071226
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English (en)
French (fr)
Inventor
贺虎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/647,108 priority Critical patent/US9797579B2/en
Publication of WO2015110013A1 publication Critical patent/WO2015110013A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/108—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening using hook and loop-type fasteners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/002—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for interchangeability, i.e. component parts being especially adapted to be replaced by another part with the same or a different function
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/46—Fixing elements
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/54—Arrangements for reducing warping-twist

Definitions

  • the invention relates to an optical component of a backlight module, in particular to a positioning device for an optical film.
  • the optical film is used in the backlight module to improve the brightness of the backlight module. Since the diaphragm is thin, it needs to be positioned by the mechanism design. In the existing optical film, a plurality of positioning holes are provided, and the shape of each positioning hole is matched with the positioning column. When the temperature is high and high humidity, the optical film will expand and contract, when cold shrinkage occurs. The optical film interferes between the positioning post and the positioning hole at the positioning position, so that the optical film is deformed and bent, which greatly affects the installation and use effect of the optical film, thereby affecting the imaging quality of the backlight module. Shadows and other phenomena appear.
  • the main object of the present invention is to provide a positioning device that allows the optical film to be thermally expanded and contracted freely, and the positioning post does not interfere in the positioning hole to ensure the flatness of the optical film.
  • the invention provides a positioning device for an optical film, comprising a positioning hole formed on the optical film and a positioning post inserted into the positioning hole, and the optical film is fixed on the carrier substrate through the positioning hole through the positioning column, wherein: the shape of each of the positioning holes respectively extends in the direction of expansion of the optical film at the corresponding position.
  • the positioning hole comprises a fixing hole, a lateral positioning hole and a longitudinal positioning hole, wherein the lateral positioning hole is in line with the fixing hole, and the longitudinal positioning hole is not in line with the fixing hole.
  • the lateral positioning hole extends in a direction parallel to the fixing hole, and the longitudinal positioning hole extends in a direction perpendicular to the fixing hole.
  • the positioning hole further comprises an oblique positioning hole extending in a direction pointing to the fixing hole.
  • the lateral positioning hole, the longitudinal positioning hole and the oblique positioning hole are respectively disposed around the fixing hole, and the long axis direction is in line with the line connecting the center of the hole and the center of the fixing hole.
  • the lateral locating holes, the longitudinal locating holes and the oblique locating holes have a major axis width greater than a minor axis width thereof and are greater than a diameter of the positioning post.
  • the shape of the fixing hole is adapted to the shape of the positioning post, and the shape of the lateral positioning hole, the longitudinal positioning hole and the oblique positioning hole are elliptical or rounded rectangle.
  • the positioning device of the optical film of the present invention is provided with a plurality of positioning holes of different shapes around the fixing hole, and the long axis extending direction of the positioning hole at the point and the shrinking direction of the optical film.
  • the width of the long axis extending direction is larger than the diameter of the positioning post, and a certain width is reserved in the positioning hole, so that the optical film can be freely swelled at each positioning point, so that the optical film is thermally expanded and contracted.
  • the positioning post does not interfere with the positioning hole, causing its bending deformation, ensuring The flatness of the optical film improves the quality of the backlight module.
  • FIG. 1 is a schematic view showing the assembly of a positioning device for an optical film according to the present invention
  • FIG. 2 is a partial enlarged view of the positioning device of the optical film in the oblique positioning hole of the present invention.
  • the present invention provides an optical film.
  • the positioning device of the sheet includes a positioning hole 10 formed on the optical film 1 and a positioning post 12 inserted into the positioning hole 10, and the optical film 1 is fixed on the carrier substrate through the positioning hole 10 through the positioning post 12.
  • the shape of each of the positioning holes 10 extends in the swell direction of the optical film 1 at the corresponding position, respectively.
  • the optical film 1 is suitable for use in a backlight module, such as a diffusion sheet, a prism sheet, a brightness enhancement film, etc., for improving the brightness and taste of the backlight module.
  • a backlight module such as a diffusion sheet, a prism sheet, a brightness enhancement film, etc.
  • the position and number of the positioning holes 10 vary depending on the design and size of the optical film.
  • positioning holes 10 are provided in the vicinity of the four corners and the middle of the side of the optical film 1 to fix the upper and lower sides thereof to the carrier substrate.
  • the optical film 1 has a rectangular structure, and the top arm and the bottom arm respectively extend with three piercing ears 14, and the piercing ears 14 on the top arm are on the same straight line, and similarly, The piercing ears 14 on the bottom arms are also in the same straight line, and the piercing ears 14 on the top and bottom arms are aligned with each other such that the points of the optical film are balanced.
  • the positioning hole 10 includes a fixing hole 101, a lateral positioning hole 102 and a longitudinal positioning hole 103.
  • the fixing hole 101 is adapted to the outer shape of the positioning post 12. If the positioning column has a circular cross section, the fixing hole 101 has a cross section. Also round.
  • the lateral positioning holes 102 and the fixing holes 101 are on the same straight line, and the longitudinal positioning holes 103 and the fixing holes 101 are not in the same straight line.
  • the fixing hole 101 is formed on the piercing hole 14 in the middle of the top arm of the optical film 1.
  • the positioning post 12 is fixed on the carrier substrate through the fixing hole 101.
  • a lateral positioning hole 102 is provided on the same line horizontal to the fixing hole 101 for fixing the top arm of the optical film 1.
  • the lateral positioning holes 102 are at least two, which are symmetrically disposed on both sides of the fixing hole 101.
  • the lateral positioning hole 102 has an elliptical shape or a rounded rectangular shape, and the short axis direction is equivalent to the diameter of the positioning post 12, and the long axis direction is on the same line as the center of the hole and the center of the fixing hole 101, and is laterally positioned.
  • the hole 102 extends in the long axis direction and extends in parallel with the fixing hole 101.
  • the lateral positioning hole 102 expands and widens its width, so that the positioning film 12 does not expand laterally under high temperature and high humidity conditions. Interference with the lateral positioning hole 102, so that the optical film 1 can freely extend to the left and right in the lateral direction. Similarly, the optical film 1 reserves an appropriate width in the lateral positioning hole 102 during the shrinking process.
  • a longitudinal positioning hole 103 is provided, which is disposed directly below the fixing hole 101, to The optical film 1 is positioned in the vertical direction.
  • the longitudinal positioning The shape of the hole 103 may also be an elliptical or rounded rectangle whose short axis direction is equivalent to the diameter of the positioning post 12, and the long axis direction is on the same line as the line connecting the center of the hole and the center of the fixing hole 101, so that the longitudinal positioning hole
  • the long axis extending direction of the 103 is perpendicular to the longitudinal direction of the lateral positioning hole 102.
  • the width is widened so that the optical film 1 is longitudinally expanded under high temperature and high humidity conditions, and the positioning post 12 is not Interference with the longitudinal positioning hole 103 allows the optical film 1 to freely extend upward and downward in the longitudinal direction.
  • an appropriate width is reserved in the longitudinal positioning hole 103 to ensure the optical film.
  • the sheet 1 does not interfere with the positioning post 12 so that it does not undergo bending deformation.
  • the piercing ears 14 on both sides of the bottom arm of the optical film 1 are symmetrically opened.
  • At least one oblique positioning hole 104 is distributed on both sides of the longitudinal positioning hole 103 to fix both sides of the bottom arm of the optical film 1.
  • the extending direction of the oblique positioning hole 104 is directed to the fixing hole 101.
  • the long-axis direction of the oblique positioning hole 104 is on the same line as the line connecting the center of the hole and the center of the fixing hole 101, and the long-axis direction (direction A) of the oblique positioning hole 104 is provided with the optical film.
  • the angle between the longitudinal direction (B direction) is an angle ⁇
  • the vertical component of the center line between the oblique positioning hole 104 and the fixed hole 101 is D1
  • the horizontal component is D2
  • tan ⁇ D1/D2.
  • the direction of the long axis of the oblique positioning hole 104 is consistent with the direction of the resultant force at the point, so that the optical film 1 does not interfere with the optical film 1 during thermal expansion and contraction, thereby ensuring interference. It can also smoothly swell on both sides of the bottom arm of the optical film without causing bending deformation of the optical film.
  • the lateral locating holes, the longitudinal locating holes and the oblique locating holes have a major axis width greater than a minor axis width thereof and are greater than a diameter of the positioning post.
  • the number and position of the fixing hole and the positioning hole are not limited, and the lateral positioning hole 102, the longitudinal positioning hole 103, and the oblique positioning hole 104 are respectively disposed around the fixing hole 101 to reinforce the positioning of the periphery of the fixing hole.
  • the long axis extending direction of each positioning hole is consistent with the thermal expansion and contraction direction of the optical film at the point, and the width of the long axis extending direction is larger than the diameter of the positioning post 12, and a certain width is reserved in the positioning hole.
  • the optical film can be freely swelled at each positioning point, and when the optical film 1 is inflated, the interference between the positioning post 12 and each positioning hole is caused to cause bending deformation of the optical film, thereby ensuring the backlight module. quality.

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

Abstract

一种光学膜片的定位装置，包括开设于光学膜片（1）上的定位孔（10）和插入定位孔（10）中的定位柱（12），通过定位柱（12）穿过定位孔（10），将光学膜片（1）固定于承载基板上，各定位孔（10）的形状分别在相应位置的光学膜片（1）的缩胀方向上延伸。定位装置在固定孔（101）的四周设置多种不同形状的定位孔（10），该点的定位孔（10）的长轴延伸方向与光学膜片（1）的缩胀方向相一致，其长轴延伸方向的宽度大于定位柱（12）的直径，在定位孔（10）中预留一定的宽度，使得光学膜片（1）能在各定位点自由地缩胀，使得光学膜片（1）发生热胀冷缩时，定位柱（12）不会对定位孔（10）产生干涉而造成其弯曲变形，保证了光学膜片（12）的平整度，从而提高了背光模组的品质。

Description

一种光学膜片的定位装置 技术领域
本发明涉及一种背光模组的光学组件，尤其是指一种用于光学膜片的定位装置。
背景技术
在背光模组中都会使用到光学膜片，以提升背光模组的亮度，由于膜片较薄，需要通过机构设计来进行定位。现有的光学膜片中，设有多个定位孔，各定位孔的外形与定位柱相适配，在高温高湿状况下时，光学膜片会发生热胀冷缩，当发生冷缩时，光学膜片在定位处的定位柱与定位孔之间发生干涉，使得光学膜片产生变形弯曲，极大地影响了光学膜片的安装和使用效果，进而影响了背光模组的成像品质，会出现暗影等现象。
发明内容
基于现有技术的不足，本发明的主要目的在于提供一种可让光学膜片自由地热胀冷缩，定位柱不会在定位孔中发生干涉，以保障光学膜片的平整度的定位装置。
本发明提供了一种光学膜片的定位装置，包括开设于光学膜片上的定位孔和插入定位孔中的定位柱，通过定位柱穿过定位孔，将光学膜片固定于承载基板上，其中：所述各定位孔的形状分别在相应位置的光学膜片的缩胀方向上延伸。
优选地，所述定位孔包括固定孔、横向定位孔和纵向定位孔，所述横向定位孔与固定孔在同一直线上，所述纵向定位孔与固定孔非同一直线上。所述横向定位孔的延伸方向与固定孔相平行，所述纵向定位孔的延伸方向与固定孔相垂直。通过定位孔在该点缩胀方向上的延伸，避免了定位柱与定位孔之间发生干涉而影响光学膜片的平整度。
优选地，所述定位孔还进一步包括斜向定位孔，其延伸方向指向固定孔。
优选地，所述横向定位孔、纵向定位孔和斜向定位孔分别设置于固定孔的四周，其长轴方向与孔中心和固定孔中心的连线在同一直线上。所述横向定位孔、纵向定位孔和斜向定位孔的长轴宽度大于其短轴宽度，且均大于定位柱的直径。
优选地，所述固定孔的形状与定位柱的外形相适配，所述横向定位孔、纵向定位孔和斜向定位孔的外形为椭圆形或圆角矩形。
与现有技术相比，本发明一种光学膜片的定位装置，在固定孔的四周设置多种不同形状的定位孔，该点的定位孔的长轴延伸方向与光学膜片的缩胀方向相一致，其长轴延伸方向的宽度大于定位柱的直径，在定位孔中预留一定的宽度，使得光学膜片能在各定位点自由地缩胀，使得光学膜片发生热胀冷缩时，定位柱不会对定位孔产生干涉而造成其弯曲变形，保证 了光学膜片的平整度，从而提高了背光模组的品质。
附图说明
图1为本发明一种光学膜片的定位装置的装配示意图；
图2为本发明一种光学膜片的定位装置在斜向定位孔的局部放大图。
具体实施方式
为了加强光学膜片的定位，且避免光学膜片的热胀冷缩时，定位柱对定位孔产生的干涉，保证光学膜片的平整，参照图1所示，本发明提供了一种光学膜片的定位装置，包括开设于光学膜片1上的定位孔10和插入定位孔10中的定位柱12，通过定位柱12穿过定位孔10，将光学膜片1固定于承载基板上，所述各定位孔10的形状分别在相应位置的光学膜片1的缩胀方向上延伸。
光学膜片1适用于背光模组中，如扩散片、棱镜片、增光膜等，用于提升背光模组的亮度和品味。根据光学膜片的设计和尺寸的不同，定位孔10的位置和个数有所不同。优选地，在光学膜片1的侧边四角和中部附近设置定位孔10，以将其上下侧边固定于承载基板上。
在本发明的优选实施例中，所述光学膜片1为矩形结构，其顶臂和底臂分别延伸有三个穿耳14，所述顶臂上的穿耳14在同一直线上，同样地，底臂上的穿耳14亦在同一直线上，并且，顶臂和底臂上的穿耳14相互对齐，使得光学膜片的各点受力均衡。所述定位孔10包括固定孔101、横向定位孔102和纵向定位孔103，所述固定孔101与定位柱12的外形相适配，若定位柱的截面为圆形，则固定孔101的截面亦为圆形。所述横向定位孔102与固定孔101在同一直线上，所述纵向定位孔103与固定孔101非同一直线上。其中，固定孔101开设于光学膜片1的顶臂中部的穿耳14上，定位柱12穿过固定孔101而固定在承载基板上。为了将光学膜片进行多点定位，使其更为稳固地装配于承载基板上，在与固定孔101相水平的同一直线上设置横向定位孔102，用于固定光学膜片1的顶臂。优选地，所述横向定位孔102为至少两个，其对称地设置于固定孔101的两侧。所述横向定位孔102的外形为椭圆形或圆角矩形，其短轴方向与定位柱12的直径相当，长轴方向与孔中心和固定孔101中心的连线在同一直线上，且横向定位孔102在长轴方向上延伸，其延伸方向与固定孔101相平行，横向定位孔102通过延伸扩宽其宽度，使得光学膜片1在高温高湿状况下发生横向膨胀时，定位柱12不会与横向定位孔102发生干涉，使得光学膜片1在横向方向上可自由地向左右延伸，同样地，光学膜片1在收缩过程中，在横向定位孔102中预留适当的宽度，可保证光学膜片1不会与定位柱12发生干涉现象，使其不会发生弯曲变形。为了对光学膜片1的竖直方向进行定位，在光学膜片1的底臂的穿耳14上，设置纵向定位孔103，所述纵向定位孔103设于固定孔101的正下方，以对光学膜片1在垂直方向上进行定位。同样地，所述纵向定位 孔103的外形亦可为椭圆形或圆角矩形，其短轴方向与定位柱12的直径相当，长轴方向与孔中心和固定孔101中心的连线在同一直线上，这样，纵向定位孔103的长轴延伸方向与横向定位孔102的长轴延伸方向相垂直，在纵向方向上，通过延伸拓宽其宽度，使得光学膜片1在高温高湿状况下发生纵向膨胀时，定位柱12不会与纵向定位孔103发生干涉，使得光学膜片1可在纵向方向上自由地向上下延伸，在光学膜片1的收缩过程中，纵向定位孔103中预留适当的宽度，可保证光学膜片1不会与定位柱12发生干涉现象，使其不会发生弯曲变形。
为了加强对光学膜片的侧面的定位，结合参照图2所示，在本发明的又一个优选实施例中，在所述光学膜片1底臂两侧的穿耳14上，对称地开设有至少一个斜向定位孔104，其分布于纵向定位孔103的两侧，以将光学膜片1的底臂两侧固定。所述斜向定位孔104的延伸方向指向固定孔101。参照图2所示，斜向定位孔104的长轴方向与孔中心和固定孔101中心的连线在同一直线上，设斜向定位孔104的长轴方向(A方向)与光学膜片的长边方向(B方向)之间的夹角为α角，斜向定位孔104与固定孔101之间的中心连线的垂直分量为D1，水平分量为D2，tanα＝D1/D2。斜向定位孔104的长轴延伸方向与在该点所受合力方向相一致，使得光学膜片1在热胀冷缩时，定位柱12与光学膜片1之间不会发生干涉，保证了在光学膜片的底臂两侧也可顺畅地缩胀，不会造成光学膜片的弯曲变形。所述横向定位孔、纵向定位孔和斜向定位孔的长轴宽度大于其短轴宽度，且均大于定位柱的直径。
在本发明中，固定孔和定位孔的个数和位置不受限制，横向定位孔102、纵向定位孔103和斜向定位孔104分别围绕固定孔101设置，以加强固定孔周边的定位。同时，各定位孔的长轴延伸方向与光学膜片在该点的热胀冷缩方向相一致，其长轴延伸方向的宽度大于定位柱12的直径，在定位孔中预留一定的宽度，使得光学膜片能在各定位点自由地缩胀，避免光学膜片1在缩胀时，定位柱12与各定位孔之间发生干涉而造成光学膜片的弯曲变形，保证了背光模组的品质。

Claims (20)

  1. 一种光学膜片的定位装置，包括开设于光学膜片上的定位孔和插入定位孔中的定位柱，通过定位柱穿过定位孔，将光学膜片固定于承载基板上，其中：所述各定位孔的形状分别在相应位置的光学膜片的缩胀方向上延伸，所述定位孔包括固定孔、横向定位孔和纵向定位孔，所述横向定位孔与固定孔在同一直线上，所述纵向定位孔与固定孔非同一直线上。
  2. 根据权利要求1所述的光学膜片的定位装置，其中：所述横向定位孔的延伸方向与固定孔相平行。
  3. 根据权利要求1所述的光学膜片的定位装置，其中：所述纵向定位孔的延伸方向与固定孔相垂直。
  4. 根据权利要求2所述的光学膜片的定位装置，其中：所述纵向定位孔的延伸方向与固定孔相垂直。
  5. 根据权利要求4所述的光学膜片的定位装置，其中：所述定位孔还进一步包括斜向定位孔，其延伸方向指向固定孔。
  6. 根据权利要求5所述的光学膜片的定位装置，其中：所述横向定位孔、纵向定位孔和斜向定位孔分别设置于固定孔的四周。
  7. 根据权利要求5所述的光学膜片的定位装置，其中：所述固定孔的形状与定位柱的外形相适配。
  8. 根据权利要求5所述的光学膜片的定位装置，其中：所述横向定位孔、纵向定位孔和斜向定位孔的长轴方向与孔中心和固定孔中心的连线在同一直线上。
  9. 根据权利要求7所述的光学膜片的定位装置，其中：所述横向定位孔、纵向定位孔和斜向定位孔的外形为椭圆形或圆角矩形。
  10. 根据权利要求9所述的光学膜片的定位装置，其中：所述横向定位孔、纵向定位孔和斜向定位孔的长轴宽度大于其短轴宽度，且均大于定位柱的直径。
  11. 一种光学膜片的定位装置，包括开设于光学膜片上的定位孔和插入定位孔中的定位柱，通过定位柱穿过定位孔，将光学膜片固定于承载基板上，其中：所述各定位孔的形状分别在相应位置的光学膜片的缩胀方向上延伸。
  12. 根据权利要求11所述的光学膜片的定位装置，其中：所述定位孔包括固定孔、横向定位孔和纵向定位孔，所述横向定位孔与固定孔在同一直线上，所述纵向定位孔与固定孔非同一直线上。
  13. 根据权利要求12所述的光学膜片的定位装置，其中：所述横向定位孔的延伸方向与固定孔相平行。
  14. 根据权利要求13所述的光学膜片的定位装置，其中：所述纵向定位孔的延伸方向与固定孔相垂直。
  15. 根据权利要求14所述的光学膜片的定位装置，其中：所述定位孔还进一步包括斜向定位孔，其延伸方向指向固定孔。
  16. 根据权利要求15所述的光学膜片的定位装置，其中：所述横向定位孔、纵向定位孔和斜向定位孔分别设置于固定孔的四周。
  17. 根据权利要求12所述的光学膜片的定位装置，其中：所述固定孔的形状与定位柱的外形相适配。
  18. 根据权利要求15所述的光学膜片的定位装置，其中：所述横向定位孔、纵向定位孔和斜向定位孔的长轴方向与孔中心和固定孔中心的连线在同一直线上。
  19. 根据权利要求18所述的光学膜片的定位装置，其中：所述横向定位孔、纵向定位孔和斜向定位孔的外形为椭圆形或圆角矩形。
  20. 根据权利要求18所述的光学膜片的定位装置，其中：所述横向定位孔、纵向定位孔和斜向定位孔的长轴宽度大于其短轴宽度，且均大于定位柱的直径。
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