WO2015188407A1 - 导光板组件 - Google Patents

导光板组件 Download PDF

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Publication number
WO2015188407A1
WO2015188407A1 PCT/CN2014/081028 CN2014081028W WO2015188407A1 WO 2015188407 A1 WO2015188407 A1 WO 2015188407A1 CN 2014081028 W CN2014081028 W CN 2014081028W WO 2015188407 A1 WO2015188407 A1 WO 2015188407A1
Authority
WO
WIPO (PCT)
Prior art keywords
light guide
guide plate
plate
bent piece
assembly according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/081028
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English (en)
French (fr)
Inventor
李全
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
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/416,359 priority Critical patent/US9829624B2/en
Publication of WO2015188407A1 publication Critical patent/WO2015188407A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0093—Means for protecting the light guide

Definitions

  • the present invention relates to the field of liquid crystal display manufacturing, and more particularly to a light guide plate assembly for a backlight. Background technique
  • the light guide plate is one of the most important components.
  • the material of the light guide plate is mainly polymethyl methacrylate (PMMA). Since polymethyl methacrylate (PMMA) has a large thermal expansion coefficient, in order to allow the light guide plate to expand freely, in the backlight module, an expansion gap needs to be reserved between the light guide plate and the frame for fixing the light guide plate. .
  • the reserved expansion gap is too large, the optical efficiency of the backlight module is affected, and since the gap is too large, the frame for fixing the light guide plate cannot closely fix the light guide plate, and the light guide plate A certain amount of sloshing may occur, which may cause friction and scratching on the optical film on the light guide plate; on the other hand, if the reserved expansion gap is too small, the size of the light guide plate will become larger after being thermally expanded, because there is no Sufficient space is provided for accommodating the light guide plate, the side edges of the light guide plate are squeezed, and the light guide plate is arched, which of course causes an abnormality in display quality.
  • an expansion gap is required between the light guide plate and the frame for fixing the light guide plate for thermal expansion of the light guide plate.
  • the expansion gap is too large or too small, it will have a negative impact.
  • the presence of the gap affects the optical efficiency of the backlight module, and the optical film on the light guide plate is scratched due to insufficient fixing, or the space is insufficient.
  • the light-expanding light guide plate is caused to be arched by extrusion.
  • the present invention provides a light guide plate assembly, the light guide plate assembly including a light guide plate And a frame for fixing the light guide plate, the light guide plate has a first side edge for introducing light and a second side edge for introducing no light, the frame at least partially surrounding the light guide plate The two side edges, wherein a buffer member capable of at least partially elastically deforming is disposed between the frame body and the second side edge of the light guide plate.
  • the cushioning member includes a supporting portion that is not elastically deformable and a functional portion that is elastically deformable, and the supporting portion and the functional portion are joined in one body at the joint region.
  • the support portion is configured as a plate-like body having a flat surface, the plate-like body having two hollow regions adjacent to opposite sides of the joint region, the functional portion not being The portion where the plate-like body is joined is on the flat surface of the plate-like body.
  • the orthographic projection of the ⁇ all falls into the hollowed-out region.
  • the setting of the hollow area is mainly to optimize the mechanical properties of the cushioning part, so that the functional part can be elastically deformed more naturally and flexibly, and the risk that the breaking or deformation is not natural enough is reduced.
  • the functional portion is configured as a bent piece extending from the joint region on one side of the plate-shaped body, the convex surface of the bent piece facing the plate-shaped body, and the concave surface of the curved piece Facing the second side edge of the light guide plate.
  • the term "bending piece” mainly refers to a sheet whose curved section is smooth and does not include a sheet whose cross section has a distinct chamfer.
  • the joint region is located at an apex of the curved piece, and the bent piece is mirror-symmetrical with respect to a central plane where the apex thereof is located, the central plane and the flat surface of the plate-shaped body and the light guide plate
  • the surfaces are all vertical.
  • a curved piece is a face formed by a plurality of arcs tiling in a lateral direction thereof, and a "vertex" corresponding to each arc has a plurality of "vertices", and these "vertices" are along The lateral direction of the bent piece constitutes a line segment. Therefore, the so-called "vertex of the bent piece” as a whole constitutes a line segment along the lateral direction of the bent piece.
  • the orthographic projection of the bent piece on the flat surface of the plate-like body is a rectangle, and Al A2 + D1 , wherein A1 represents between the end edges of the two hollow regions away from the joint region Distance A2 represents the distance between the opposite end edges of the bent piece; and D1 represents the distance between the end edge of the bent piece and the flat surface of the plate-like body facing the bent piece.
  • the functional portion is configured as a flap extending from the joint region on one side of the plate-shaped body, the outer corner surface of the flap facing the plate-shaped body, and the inner corner surface of the flap Facing the light guide plate The second side edge.
  • the term "flap” mainly refers to a sheet whose cross-sectional shape has a distinct chamfer and which is substantially a flat surface in the remaining portion.
  • the flap there is an arcuate region that is curved toward the plate-like body, the convex surface of the arcuate region abutting against the second edge of the light guide plate. So constructed, the arcuate region exerts a relatively soft pressure on the second edge of the light guide plate, which does not easily damage the second edge of the light guide plate, and in turn prevents the flap itself from being damaged.
  • the bend of the flap in the joint region is arranged smoothly. In this way, it is possible to prevent the flap from being fatigued or broken at the bent portion, thereby ensuring the service life of the entire cushion member.
  • the support portion of the cushioning member is integrally formed with the frame body. This saves additional time, process, materials and money.
  • the buffer member is provided on the frame body:
  • the functional part of the cushioning member is closely abutted against the light guide plate, and there is no gap between the two, which ensures the optical efficiency of the entire backlight module; at the same time, the frame for fixing the light guide plate can be tightly fixed
  • the light guide plate prevents the light guide plate from shaking, thereby avoiding friction and scratching on the optical film on the light guide plate due to shaking.
  • the functional portion of the cushioning member can be elastically deformed, although the size of the light guide plate is increased after being thermally expanded, since the functional portion is elastically compressed by the light guide plate, a sufficient space can be provided for accommodating the light guide plate.
  • the light guide plate is prevented from being pressed by the rigid pressure and arched, thereby ensuring the display quality of the display.
  • FIG. 1 is a cross-sectional view of a liquid crystal display equipped with a light guide plate assembly according to the present invention
  • FIG. 2 is a view showing a frame of a first embodiment of a light guide plate assembly according to the present invention
  • Figure 3 is a partial enlarged view of the cushioning member of the frame of Figure 2;
  • Figure 4 is a cross-sectional view of the frame of Figure 2 taken along line A-A;
  • Figure 5 shows a first state of the first embodiment of the light guide plate assembly according to the present invention, wherein the light guide plate is in a natural state
  • Figure 6 shows a second state of the first embodiment of the light guide plate assembly according to the present invention, wherein the light guide plate is in a state of being thermally expanded
  • Figure 7 shows a frame of a second embodiment of a light guide plate assembly according to the present invention.
  • Figure 8 is a partial enlarged view of the cushioning member of the frame of Figure 7;
  • Figure 9 is a cross-sectional view of the frame of Figure 7 taken along line B-B.
  • the light guide plate assembly includes a light guide plate 1 and a frame 2 for fixing the light guide plate 1.
  • the light guide plate 1 has a first side edge 1.3 for introducing light and a second side edge 1.4 for introducing light.
  • a light-emitting element 4 is usually disposed on one side of the light guide plate 1.
  • the light-emitting element 4 is disposed in the vicinity of the first side edge 1.3 of the light guide plate 1 for introducing light, such that light from the light-emitting element 4 can enter through the first side edge 1.3.
  • the light-emitting element 4 can be a light-emitting diode (LED).
  • LED light-emitting diode
  • a blue light-emitting diode (LED) with high luminous efficiency is generally used, and a phosphor or a quantum strip is disposed between the blue light-emitting diode (LED) and the light guide plate 1, and the latter can be excited to generate blue light.
  • the complementary light causes the light that finally enters the interior of the light guide plate 1 through the first side edge 13 to be a full-color white light.
  • a light reflecting film 1.2 is disposed on the bottom surface of the light guide plate 1 to lock the light inside the light guide plate 1.
  • the light is converted into a uniform surface light source by reflection, scattering, refraction, etc. of the optical film layer of the light guide plate 1, and then emitted through the top surface 1.1 of the light guide plate 1, for example, after some additional homogenization treatment, etc., finally enters the liquid crystal. box.
  • the light from the light guide plate 1 is ejected in the liquid crystal cell through the array substrate, the liquid crystal layer (by the liquid crystal to change the polarization state), and the color filter substrate (here divided into three primary colors and mutually tuned to form a specific color required for the display image). . In this way, the viewer can see a particular display from the screen of the liquid crystal display.
  • the frame 2 its main function is to support and fix the light guide plate 1, so that the frame 2 can be disposed around the four edges of the light guide plate 1.
  • the frame 2 Considering the effect of full fixation, the gravity balance of the entire liquid crystal display, and the frame 2 and other supporting components in the liquid crystal display (for example, a back panel, provided with, for example, an LED strip
  • the frame 2 is provided as a rectangular frame as shown in FIG. 2, which covers all the edges of the light guide plate 1.
  • the frame 2 needs to at least partially surround the second side edge 1.4 of the light guide plate 1 that does not introduce light, so that the technical solution according to the present invention can be effectively implemented.
  • a cushion member 3 capable of at least partially elastically deforming is provided between the frame 2 and the second side edge 1.4 of the light guide plate 1.
  • the second side edge 1.4 represents the side edge of the light guide plate 1 that is not used to introduce light.
  • the buffer member 3 is disposed at a position corresponding to the second side edge 1.4 of the light guide plate 1 (instead of the first side edge 13), so that the buffer member 3 does not hinder the light path design of the light-emitting element 4, Does not hinder the normal transmission of light.
  • the elastic deformation function of the cushioning member 3 can provide a certain letting space between the frame 2 and the second side edge 1.4 of the light guide plate 1.
  • the second side edge 1.4 of the light guide plate 1 is mounted in the frame body 2 against the cushioning member 3.
  • the cushioning member 3 performs its elastic deformation function and can be freely adjusted.
  • the distance between the frame 2 and the second side edge 1.4 of the light guide plate 1. since the cushion member 3 is actually deformed by being compressed by the expanded light guide plate 1, the two are always closely adhered to each other, and the light guide plate 1 is fixed at any time.
  • the light guide plate 1 obtains a certain buffer space, and the light guide plate 1 is not subjected to rigidity due to a reasonable design so that the degree of thermal expansion of the light guide plate 1 does not exceed the elastic deformation range of the cushion member 3.
  • the squeezing force is deformed and arched, thereby avoiding the normal display effect;
  • the buffer member 3 - the side is always tightly abutted against the second side edge 1.4 of the light guide plate 1, and
  • the cushioning member 3 can firmly hold the light guide plate 1. In this way, there is no loose gap around the light guide plate 1 to prevent the light guide plate 1 from being scratched when it is shaken.
  • Optical film layer is a certain buffer space, and the light guide plate 1 is not subjected to rigidity due to a reasonable design so that the degree of thermal expansion of the light guide plate 1 does not exceed the elastic deformation range of the cushion member 3.
  • the squeezing force is deformed and arched, thereby avoiding the normal display effect;
  • Fig. 2 shows a frame 2 of a first embodiment of a light guide plate assembly according to the present invention.
  • a cushioning member 30 is provided at a position of the frame 2 toward the second side edge 1.4 of the light guide plate 1 (not shown in the drawing, but its position is located inside the frame 2, which is easily understood).
  • Fig. 3 shows a partial enlarged view of the cushioning member 30 of the frame 2 of Fig. 2.
  • the cushioning member 30 includes a supporting portion 30.1 which is not elastically deformable and a functional portion 30.2 which is elastically deformable, and the supporting portion 30.1 and the functional portion 30.2 are integrally joined at the joint region 30.3.
  • the support portion 30.1 and the frame 2 are fixedly coupled to each other.
  • the entire frame 2 can be closely attached to the light guide plate 1 through the cushioning member 3 (the portion to be attached will be specifically described below), thereby fixing the light guide plate 1 without leaving any swaying gap; on the other hand, due to the functional portion 30.2
  • the elastic deformation can occur, and when the light guide plate 1 is thermally expanded, the functional portion 30.2 is pressed and adaptively deformed (compressed) to make room for the expansion of the light guide plate 1 instead of the frame as in the prior art.
  • the light guide plate 1 is rigidly pressed, and the latter causes the light guide plate 1 to be deformed and arched; at the same time, it is easy to understand that when the light guide plate 1 is returned to the thermal reset, the functional portion 30.2 is correspondingly reset (as long as the design is reasonable, The entire process does not exceed the critical value of its elastic deformation, which is easily accomplished by those skilled in the art), the function of the light guide plate 1 and the buffer member 30 throughout the process from compression deformation to recovery.
  • the portion 30.2 is always in close contact, ensuring that the light guide plate 1 is firmly fixed in the frame 2 without being shaken.
  • the support portion 30.1 is configured as a plate-like body 30.1 having a flat surface, and the plate-like body 30.1 has two hollow regions 30 ⁇ 2 adjacent to opposite sides of the joint region 30.3, and the functional portion 30.2 is not
  • the orthographic projection of the portion where the plate-like body 30.1 is joined on the flat surface of the plate-like body 30.1 falls into the hollow region 30 ⁇ 2.
  • the cutout area 30 ⁇ 2 is indicated by hatching, that is, the plate body 30.1 is hollowed out in the area covered by the hatching.
  • the hollow area 30 ⁇ 2 is mainly set to optimize the mechanical properties of the cushioning member 30, so that the functional part 30.2 can be elastically deformed more naturally and flexibly, reducing the risk that the breaking or deformation is not natural.
  • the functional part 30.2 can be elastically deformed more naturally and flexibly, reducing the risk that the breaking or deformation is not natural.
  • the functional portion 30.2 is configured as a bent piece 30.2 extending from the joint region 30.3 on one side of the plate-like body 30.1, and the convex surface 30.2.5 of the bent piece 30.2 faces the concave portion of the plate-like body 30.1 and the curved piece 30.2. 30.2.6
  • the second side edge 1.4 of the light guide plate 1 (not shown in Fig. 3, the apparent positional relationship can be understood in conjunction with Fig. 1).
  • bending sheet mainly means a sheet having a curved cross section, and does not include a sheet having a substantially folded cross section.
  • the joint region 30.3 is located at the apex of the bent piece 30.2, and the bent piece 30.2 is mirror-symmetrical with respect to the central plane where the apex thereof is located, the central plane and the flat surface of the plate-like body 30.1 and the light guide plate 1
  • the planes are all vertical.
  • the apex of the curved piece 30.2 constitutes the side along the curved piece A line segment in the direction.
  • the curved piece 30.2 is a face formed by laterally tiling a plurality of arcs, and a "vertex" corresponding to each arc has a plurality of "vertices” which are along the side of the curved piece.
  • a line segment is formed in the direction (shown schematically by the broken line D in Fig. 3).
  • the central plane is perpendicular to the flat surface of the plate-like body 30.1;
  • the central plane is perpendicular to the surface of the light guide plate 1 (i.e., the planar direction of the screen of the entire liquid crystal display).
  • the central plane, the flat surface of the plate-like body 30.1, and the surface of the light guide plate 1 may form reference planes of the space rectangular coordinate system, and the line segment formed by the "apex" of the curved piece 30.2 passes through the central plane.
  • the curved piece 30.2 is mirror-symmetrical with respect to the central plane. It can be easily understood from Fig. 3 that the central plane is actually a plane of symmetry in the center of the curved piece 30.2, that is, the curved piece 30.2 itself is a mirror-symmetrical structure about the central plane, and " The vertex is the midpoint of the arc in its section.
  • Figure 4 is a cross-sectional view of the frame 2 of Figure 2 taken along line A-A.
  • the preferred size of the cushioning member 30 will be described below with reference to FIG. It will be readily understood that in the embodiment illustrated in the drawings, the bent piece 30.2 is on the flat surface of the plate-like body 30.1.
  • the orthographic projection of the ⁇ is rectangular.
  • A1 represents the distance between the end edges 30 ⁇ 1 of the two hollow regions 3 ⁇ 2 away from the joint region 30.3
  • A2 represents the relationship between the opposite end edges 30.2.1 of the bent piece 30.2.
  • the plate-like body 30.1 and the bent piece 30.2 of the cushion member 30 are constructed in accordance with the dimensions, and the mechanical properties thereof can be optimized.
  • the plate-like body 30.1 can both provide sufficient fixation and support without hindering and constraining the free elastic deformation of the curved piece 30.2.
  • the cushioning member 30 can securely support and fix the light guide plate 1 in a sufficiently rigid manner, and on the other hand, can flexibly provide an elastic buffer space for the expansion of the light guide plate 1, which is optimally obtained in two functions.
  • the compromise can meet both requirements at the same time, and does not cause tearing or obstruction within the buffer member 30 itself.
  • FIG. 5 shows a first state of the first embodiment of the light guide plate assembly according to the present invention, in which the light guide plate 1 is in a natural state (unexpanded).
  • the functional portion 30.2 of the cushioning member 30 i.e., the bent piece 30.2
  • the two end edges 30.2.1 of the bent piece 30.2 are closely abutted against the second edge 1.4 of the light guide plate 1. Since the end edge 30.2.1 of the bent piece 30.2 directly opposes the second edge 1.4 of the light guide plate 1, the frame 2 can press the light guide plate 1 through the cushioning member 30 so that it cannot be shaken casually.
  • Fig. 6 shows a second state of the first embodiment of the light guide plate assembly according to the present invention, in which the light guide plate 1 is in a state of being thermally expanded.
  • the functional portion 30.2 i.e., the bent piece 30.2
  • the bent piece 30.2 has undergone significant deformation, and its deformation is caused by the thermal expansion and contraction of the light guide plate 1.
  • almost the entire concave surface 30.2.6 of the bent piece 30.2 is attached to the second edge 1.4 of the light guide plate 1.
  • the end portion 30.2 of the bent piece 30.2 is always closely abutted against the second edge 1.4 of the light guide plate 1. In this way, during the entire expansion process, the frame 2 can press the light guide plate 1 through the cushioning member 30 so that it does not shake easily.
  • Fig. 7 shows a frame 2 of a second embodiment of a light guide plate assembly according to the present invention.
  • the second side edge 1.4 of the frame 2 facing the light guide plate 1 (not shown in the drawing, but its position is located inside the frame 2, which is easy to understand)
  • a buffer member 40 is provided at the position of ).
  • Fig. 8 is a partially enlarged view showing the cushioning member 40 of the frame 2 of Fig. 7.
  • the cushioning member 40 includes a supporting portion 40.1 which is not elastically deformable and a functional portion 40.2 which is elastically deformable, and the supporting portion 40.1 and the functional portion 40.2 are integrally joined at the joint region 40.3.
  • the support portion 40.1 is constructed as a plate-like body 40.1 having a flat surface having two hollow regions 40 ⁇ 2 adjacent to opposite sides of the joint region 40.3, and the plate portion of the functional portion 40.2
  • Figure 9 is a cross-sectional view of the frame of Figure 7 taken along line BB.
  • the functional portion 40.2 is configured as a flap 40.2 extending from the joint region 40.3 on the - side of the plate-like body 40.1, the flap 40.2
  • the outer corner surface 40.2.5 faces the plate-like body 2
  • the inner corner surface 40.2.6 of the flap 40.2 faces the second side edge 1.4 of the light guide plate 1.
  • the sheet “mainly refers to a sheet whose cross-sectional shape has a distinct chamfer and which is substantially a flat surface in the remaining portion.
  • the functional portion 40.2 of the cushioning member 40 as a whole is not a curved piece having a rounded curved cross section. Instead, it has a flap 40.2 with a bend 40.2.4 (the cross-sectional shape of which has a distinct chamfer and the remainder is a flat surface).
  • the flaps have different mechanical properties compared to the bent piece.
  • the stiffness coefficient of the deformation of the two, the deformation strength in the surface direction of the plate-like bodies 30.1, 40.1, and the direction of the normal phase of the plate-like bodies 30.1, 40, 1 are different. Therefore, the present invention provides two different options, and a suitable embodiment can be selected according to the thermal expansion coefficient of the light guide plate 1 and the material of the frame 2.
  • the bent portion 40.2.4 of the flap 40.2 located in the joint region 40.3 is smoothly disposed. Because the bent portion 40.2.4 is the most fragile part of the flap 40.2, the sleek setting can be dispersed by the deformation to the bent portion
  • the resulting pressing force prevents fatigue or breakage of the flap 40.2, which ensures the service life of the entire cushioning member 40.
  • the flap 40.2 can be symmetrical about its bend 40.2.4.
  • the flap 40.2 there is an arcuate region 40.2.3 which is curved towards the plate-like body 40.1, and the convex surface of the arcuate region 40.2.3 abuts against the second edge 1.4 of the light guide plate 1.
  • the curved region 40.23 is only located at the end of the flap 40.2, i.e., most of the portion of the flap 40.2 is still a flat surface.
  • the curved region 40.23 is mainly for forming a relatively gentle receiving portion for abutting against the second edge 1.4 of the light guide plate 1.
  • the close abutment continues, so that the smooth convex surface of the curved region 40.2.3 and the light guide plate are The second edge 1.4 of 1 contacts, the curved region 40.2.3 applies a relatively soft pressure to the second edge 1.4 of the light guide plate 1, and does not easily damage the second edge 1.4 of the light guide plate 1 (and vice versa also prevents the flap 40.2 Self-damaged). In this way, the service life of the cushion member 40 is ensured.
  • the buffer member is provided on the frame body:
  • the functional part of the cushioning member is closely abutted against the light guide plate, and there is no gap between the two, which ensures the optical efficiency of the entire backlight module; at the same time, the frame for fixing the light guide plate can be closely fixed to the guide.
  • the light plate prevents the light guide plate from shaking, thereby avoiding friction and scratching on the optical film on the light guide plate due to shaking.
  • the functional portion of the cushioning member can be elastically deformed, although the size of the light guide plate is increased after being thermally expanded, since the functional portion is elastically compressed by the light guide plate, a sufficient space can be provided for accommodating the light guide plate. Preventing the light guide plate from being squeezed by the rigid pressure and arching, ensuring the display of the display Quality.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种导光板组件，涉及液晶显示器制造领域，导光板组件包括导光板（1）和用于固定所述导光板（1）的框体（2），所述导光板（1）具有用于引入光线的第一侧缘（1.3）和不引入光线的第二侧缘（1.4），所述框体（2）至少局部地包围住所述导光板（1）的第二侧缘（1.4），其中，在所述框体（2）和所述导光板（1）的第二侧缘（1.4）之间设置有能够至少局部地发生弹性形变的缓冲件（3）。

Description

导光板组件 相关中请的交叉引用
本申请要求享有于 2014年 6月 12日提交的名称为 "导光板组件"的中国专 利申请 CN201410260368.1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
本发明涉及液晶显示器制造领域， 尤其涉及一种用于背光源的导光板组件。 背景技术
在显示器的背光模组中， 导光板是最主要的零部件之一。 在现有技术中， 导 光板的材质主要是聚甲基丙烯酸甲酯 (PMMA)。 由 Τ聚甲基丙烯酸甲酯 (PMMA) 的热膨胀系数较大， 为了使导光板能够自由膨胀， 在背光模组中， 在导光板和用 于固定导光板的框体之间需要预留膨胀间隙。
然而， 一方面， 如果预留的膨胀间隙过大， 就会影响背光模组的光学效率， 且由于间隙过大， 用于固定导光板的框体便不能够紧密地固定住导光板， 导光板 会发生一定幅度的晃动， 容易对导光板上的光学膜造成摩擦和刮伤； 另一方面， 如果预留的膨胀间隙过小， 则导光板受热膨胀后尺寸会变大， 这时因为已经没有 足够的空间用来容纳导光板， 导光板的侧部边缘受到挤压， 导光板就会拱起， 这 当然会引起显示品质的异常。 发明内容
在现有技术的背光模组中， 在导光板和用于固定导光板的框体之间需要预留 膨胀间隙， 用于导光板的热膨胀。 然而， 膨胀间隙过大或过小， 都会带来负面影 响， 例如间隙的存在使背光模组的光学效率受到影响， 由于固定不够牢固而造成 导光板上光学膜的刮伤， 或者由于空间不够而使得受热膨胀后的导光板被挤压拱 起。
针对 .―匕述问题， 本发明提出了一种导光板组件， 所述导光板组件包括导光板 和用于固定所述导光板的框体， 所述导光板具有用于引入光线的第一侧缘和不引 入光线的第二侧缘， 所述框体至少局部地包围住所述导光板的第二侧缘， 其中， 在所述框体和所述导光板的第二侧缘之间设置有能够至少局部地发生弹性形变 的缓冲件。
优选地， 所述缓冲件包括不能够发生弹性形变的支撑部分和能够发生弹性形 变的功能部分， 所述支撑部分和所述功能部分在接合区域接合为-一体。
优选地， 所述支撑部分构造为具有平坦表面的板状体， 所述板状体具有相邻 地位于所述接合区域的相对两侧的两个镂空区域， 所述功能部分的未与所述板状 体相接合的部位在所述板状体的平坦表面 . --匕的正投影全部落入所述镂空区域中。 镂空区域的设置主要是为了优化缓冲件的力学性质， 使得功能部分可以更加自 然、 柔韧地发生弹性形变， 而降低其折断或变形不够自然的风险。
优选地， 所述功能部分构造为在所述板状体的一侧从所述接合区域延伸出来 的弯片， 所述弯片的凸出面面向所述板状体， 所述弯片的凹陷面面向所述导光板 的第二侧缘。 此处， 用语 "弯片"主要指其截面为圆滑的弧形的片体， 不包括其 截面具有明显折角的片体。
优选地， 所述接合区域位于所述弯片的顶点处， 所述弯片相对于其顶点所在 的中央平面镜像对称， 所述中央平面与所述板状体的平坦表面和所述导光板的表 面均垂直。实际 .―匕弯片为由多条弧线沿其侧向方向平铺而构成的一个面，一个"顶 点"对应每一条弧线， 则其具有多个 "顶点" ， 这些 "顶点"沿着弯片的侧向方 向构成一条线段。 因此所谓 "弯片的顶点"整体 .―匕构成沿着弯片的侧向方向的一 条线段。
优选地， 所述弯片在所述板状体的平坦表面上的正投影为矩形， 且 Al A2+D1 , 其中 A1表示所述两个镂空区域的远离所述接合区域的末端边缘之间的 距离； A2表示所述弯片的相对的两个末端边缘之间的距离； 以及 D1表示所述弯 片的末端边缘与所述板状体的朝向所述弯片的平坦表面之间的距离。 按照所述尺 寸来构造缓冲件的板状体和弯片， 可以将其力学性质最优化。 -一方面能够足够紧 固地支撑和固定住导光板， 另一方面又能够灵活地为导光板的膨胀提供弹性的缓 冲空间， 在两个功能中获得了最佳折衷。
优选地， 所述功能部分构造为在所述板状体的一侧从所述接合区域延伸出来 的折片， 所述折片的外角面面向所述板状体， 所述折片的内角面面向所述导光板 的第二侧缘。 此处， 用语 "折片"主要指其截面形状具有明显的折角， 而在其余 部分大致为平坦表面的片体。
优选地， 在所述折片的端部处具有朝向所述板状体弯曲的弧形区域， 所述弧 形区域的凸出面顶靠着所述导光板的第二边缘。 如此地构造， 弧形区域给导光板 的第二边缘所施加的压力相对柔和， 不易损坏导光板的第二边缘， 反过来也防止 了折片自身受损。
优选地， 所述折片的位于所述接合区域中的弯折部圆滑地设置。 如此地， 可 以防止折片在弯折部发生疲劳或断裂， 保证了整个缓冲件的使用寿命。
优选地， 所述缓冲件的所述支撑部分与所述框体一体成型。 如此可节省另外 的时间、 工序、 材料及金钱的成本。
根据本发明的导光板组件， 由于在框体上设置了缓冲件：
-一方面， 缓冲件的功能部分与导光板紧密抵靠， 二者之间并无间隙， 保证了 整个背光模组的光学效率； 同时， 使得用于固定导光板的框体能够紧密地固定住 导光板， 防止导光板发生晃动， 避免了因为晃动而对导光板上的光学膜造成摩擦 和刮伤。
另一方面， 由于缓冲件的功能部分能够发生弹性形变， 虽然导光板受热膨胀 后尺寸会变大， 这时因为功能部分弹性地被导光板压缩， 可以让出足够的空间用 来容纳导光板， 防止了导光板受到刚性压力的挤压而拱起， 保证了显示器的显示 品质。
. --匕述技术特征可以各种适合的方式组合或由等效的技术特征来替代， 只要能 够达到本发明的目的。 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显示了配备有根据本发明的导光板组件的液晶显示器的剖视图； 图 2显示了根据本发明的导光板组件的第-一实施例的框体；
图 3显示了图 2中的框体的缓冲件的局部放大图；
图 4显示了图 2中的框体沿 A-A线的剖视图；
图 5显示了根据本发明的导光板组件的第一实施例的第一状态， 其中导光板 处于自然状态； 图 6显示了根据本发明的导光板组件的第一实施例的第二状态， 其中导光板 处于受热膨胀的状态；
图 7显示了根据本发明的导光板组件的第二实施例的框体；
图 8显示了图 7中的框体的缓冲件的局部放大图； 以及
图 9显示了图 7中的框体沿 B-B线的剖视图。
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。 具体实 ½方式
- F面将结合附图对本发明作进一歩说明。
图 1显示了配备有根据本发明的导光板组件的液晶显示器剖视图。 根据本发 明的导光板组件包括导光板 1和用于固定导光板 1的框体 2。
导光板 1 具有用于引入光线的第一侧缘 1.3 和不用于引入光线的第二侧缘 1.4。 由图 1中可清楚地看出， 在典型的液晶显示器的背光模组中， 通常在导光板 1 的一侧设置发光元件 4。 在图 1所示的实施例中， 发光元件 4设置在导光板 1 的用于引入光线的第一侧缘 1.3附近， 如此使得来自发光元件 4的光线能够通过 第一侧缘 1 .3进入到导光板 1内部。
典型地， 发光元件 4可以为发光二级管 (LED)。 目前通常采用发光效率较高 的蓝色发光二级管 (LED),并在蓝色发光二级管 (LED)与导光板 1之间设置荧光粉 或量子条， 后者可受激产生蓝色光的互补光， 使得最终通过第一侧缘 13进入到 导光板 1内部的光线为色彩饱满的白色光。
在导光板 1的底面设置有反光膜 1.2， 其可以将光线锁定于导光板 1的内部。 光线通过导光板 1的光学膜层的反射、 散射、 折射等转换成均匀的面光源， 而后 通过导光板 1的顶面 1.1射出， 例如可再经过一些额外的匀光处理等后， 最终进 入液晶盒。 来自导光板 1的光线在液晶盒中分别经过阵列基板、 液晶层 （通过液 晶改变偏振状态） 和彩膜基板 （在此处分为三原色， 并相互调和以形成显示画面 所要求的特定颜色） 后射出。 以此方式， 观看者即可从该液晶显示器的屏幕上观 看到特定的显示画面。
关于框体 2， 其主要作用是用来支撑和固定住导光板 1， 因此框体 2可围绕 导光板 1的四个边缘来设置。 考虑到全面固定的效果、 整个液晶显示器的重力平 衡， 以及框体 2与液晶显示器内其它支撑部件（例如背板、设置有例如 LED灯条 的发光元件的支撑板以及卡件等） 之间的相互接合， 优选地框体 2设置为如图 2 所示的矩形框架， 其包覆住导光板 1的所有边缘。 然而， 框体 2需要至少局部地 包围住导光板 1 的不引入光线的第二侧缘 1.4， 才能够有效实施根据本发明的技 术方案。
根据本发明， 在框体 2和导光板 1的第二侧缘 1.4之间设置有能够至少局部 地发生弹性形变的缓冲件 3。 如前所述， 第二侧缘 1.4即代表导光板 1 的不用于 引入光线的侧缘。 将缓冲件 3设置在框体 2的与导光板 1 的第二侧缘 1.4 (而非 第一侧缘 13 ) 相对应的位置处， 则缓冲件 3不会妨碍发光元件 4的光路设计， 也不会妨碍光线的正常传播。
如此设置,缓冲件 3的弹性形变功能可以在框体 2和导光板 1的第二侧缘 1.4 之间提供一定的让位空间。 导光板 1 的第二侧缘 1 .4以抵靠着缓冲件 3的方式而 装设到框体 2中， 当导光板 1受热膨胀时， 缓冲件 3实施其弹性形变的功能， 可 自由调节框体 2和导光板 1的第二侧缘 1.4之间的距离。 同时， 由于实际上缓冲 件 3是被膨胀的导光板 1压縮而形变的， 二者之间始终保持紧密贴合， 保证了在 任意时刻固定住导光板 1。
如此地， -一方面， 导光板 1得到了一定的缓冲空间， 只要通过合理设计， 使 得导光板 1的热胀程度不超出缓冲件 3的弹性形变范围， 则导光板 1就不会因为 受到刚性的挤压力而变形拱起， 避免了因此而影响正常的显示效果； 另一方面， 在整个形变过程中， 缓冲件 3—侧始终紧密抵靠着导光板 1 的第二侧缘 1.4， 另 一侧与框体 2相互固定， 则缓冲件 3可以牢固地卡住导光板 1， 以此方式， 在导 光板 1的周围不存在使其松动的间隙， 防止了导光板 1在晃动时刮伤光学膜层。
图 2显示了根据本发明的导光板组件的第-一实施例的框体 2。 在框体 2的朝 向导光板 1 的第二侧缘 1.4 (图中未示出， 但其位置位于框体 2的内部， 这很容 易理解） 的位置处设置有缓冲件 30。
图 3显示了图 2中的框体 2的缓冲件 30的局部放大图。 在图 3所示的实施 例中， 缓冲件 30包括不能够发生弹性形变的支撑部分 30.1和能够发生弹性形变 的功能部分 30.2,支撑部分 30.1和功能部分 30.2在接合区域 30.3处接合为一体。
支撑部分 30.1与框体 2相互固定地接合。在现有技术中，这有许多实现方式, 例如焊接、 胶粘等， 然而考虑到工艺过程的简化和材料成本的降低， 最优选将支 撑部分 30.1与框体 2—体成型。 由于支撑部分 30.1与框体 2相互固定地接合， 整个框体 2可以通过缓冲件 3与导光板 1紧密贴合 (下面会具体介绍贴合的部分）, 从而将导光板 1固定住， 不留出任何晃动间隙； 另一方面， 由于功能部分 30.2能 够发生弹性形变， 在导光板 1受热膨胀时， 功能部分 30.2会被挤压而发生适应性 形变 （被压缩） ， 为导光板 1的膨胀让出空间， 而非如现有技术那般使框体刚性 地对导光板 1进行挤压， 后者会导致导光板 1变形拱起； 同时， 容易理解， 当导 光板 1退热复位时， 功能部分 30.2也会相应地发生复位（只要设计合理， 使得整 个过程不会超出其弹性形变的临界值， 而这对于本领域技术人员而言是容易做到 的） , 在从压縮形变到复原的整个过程中， 导光板 1和缓冲件 30的功能部分 30.2 始终紧密贴合， 保证了将导光板 1牢固地固定于框体 2中， 而不使其晃动。
在图 3 中， 支撑部分 30.1构造为具有平坦表面的板状体 30.1， 板状体 30.1 具有相邻地位于接合区域 30.3的相对两侧的两个镂空区域 30丄 2， 功能部分 30.2 的未与板状体 30.1接合的部位在板状体 30.1 的平坦表面上的正投影全部落入镂 空区域 30丄 2中。 为了便于观察， 图中用阴影线表示了镂空区域 30丄 2， 也就是 说， 在阴影线所覆盖的区域中， 板状体 30.1被挖空了。
镂空区域 30丄 2的设置主要是为了优化缓冲件 30的力学性质， 使得功能部 分 30.2可以更加自然、柔韧地发生弹性形变， 而降低其折断或变形不够自然的风 险。 通过在接合区域 30.3的相对两侧在板状体 30.1上挖出两个镂空区域 30丄 2, 减小了周围区域对接合区域 303的束缚， 使得功能部分 30.2与板状体 30.1之间 的接合更加柔和自然， 因此功能部分 30.2的弹性形变可更加自由， 而不会被不能 形变的刚性板状体 30.1所拉扯、 束缚， 甚至由于局部受力不均而破裂。
在图 3中， 功能部分 30.2构造为在板状体 30.1的一侧从接合区域 30.3延伸 出来的弯片 30.2， 弯片 30.2的凸出面 30.2.5面向板状体 30.1 , 弯片 30.2的凹陷 面 30.2.6面向导光板 1的第二侧缘 1.4 (图 3中未示出， 可结合图 1理解其显而 易见的位置关系） 。
需要强调的是， 在本发明的第一实施例中， 用语 "弯片"主要指其截面为圆 滑的弧形的片体， 不包括其截面具有明显折角的片体。
由图 3可明显看出， 接合区域 30.3位于弯片 30.2的顶点处， 且弯片 30.2相 对于其顶点所在的中央平面镜像对称，所述中央平面与板状体 30.1的平坦表面和 导光板 1的平面均垂直。
此处以立体几何的角度考虑， "弯片 30.2的顶点"整体 t:构成沿着弯片的侧 向方向的一条线段。 实际上弯片 30.2为由多条弧线沿侧向平铺而构成的一个面， 一个 "顶点"对应每一条弧线， 则其具有多个 "顶点" ， 这些 "顶点"沿着弯片 的侧向方向构成一条线段 （在图 3中由虚线 D示意性显示） 。
至于 "中央平面" ， 关于其有三个方面的限定：
第一， 上述由 "顶点"所构成的线段 （即图 3中的虚线 D) 位于该中央平面 内；
第二， 该中央平面与板状体 30.1的平坦表面垂直；
第三,该中央平面与导光板 1的表面（即整个液晶显示器的屏幕的平面方向） 垂直。
也就是说， 中央平面、板状体 30.1的平坦表面和导光板 1的表面可形成空间 直角坐标系的 个基准面， 且弯片 30.2的 "顶点"所构成的线段要经过该中央平 面。 弯片 30.2关于中央平面镜像对称， 在图 3中可很容易地理解， 中央平面实际 上就是位于弯片 30.2中央的对称平面， 即弯片 30.2 自身为关于该中央平面的镜 像对称结构， 而 "顶点" 即其截面中的弧线的中点。
当然， 用语 "顶点"和 "中央平面"应从机械领域的角度进行理解， 其所代 表的位置应当理解为包括机械公差能够允许的范围， 而并非严格的几何构型。
图 4显示了图 2中的框体 2沿 A-A线的剖视图。下面将结合图 4介绍缓冲件 30的优选尺寸。 容易理解， 在附图所示的实施例中， 弯片 30.2在板状体 30.1的 平坦表面 . --匕的正投影为矩形。优选地在缓冲件 30中，使其尺寸满足 A1 5?A2+D1。 其中参照图 4可知， A1表示所述两个镂空区域 3丄 2的远离接合区域 30.3的末端 边缘 30丄 1之间的距离； A2表示弯片 30.2的相对的两个末端边缘 30.2.1之间的 距离； 以及 D 1表示弯片 30.2的末端边缘 30.2.1 与板状体 30.1的朝向弯片 30.2 的平坦表面之间的距离。
按照所述尺寸来构造缓冲件 30的板状体 30.1和弯片 30.2， 可以将其力学性 质最优化。板状体 30.1既能够起到足够的固定和支撑作用， 又不会妨碍和约束弯 片 30.2的自由弹性形变。 从而， 缓冲件 30 -—方面能够足够紧固地支撑和固定住 导光板 1， 另-一方面又能够灵活地为导光板 1 的膨胀提供弹性的缓冲空间， 在两 个功能中获得了最佳折衷， 能够同时满足两个方面的需求， 且不会在缓冲件 30 自身内部造成相互撕扯或阻碍。
- F面将具体介绍缓冲件 30的作用过程。 图 5显示了根据本发明的导光板组件的第一实施例的第一状态， 其中导光板 1处于自然状态（未膨胀）。此时可以发现缓冲件 30的功能部分 30.2 (即弯片 30.2) 并未发生明显形变，而弯片 30.2的两个末端边缘 30.2.1紧密抵靠住导光板 1的第 二边缘 1.4。 由于弯片 30.2的末端边缘 30.2.1直接顶住导光板 1的第二边缘 1.4, 框体 2可通过缓冲件 30将导光板 1压住， 使其不能随便晃动。
图 6显示了根据本发明的导光板组件的第-一实施例的第二状态， 其中导光板 1处于受热膨胀的状态。 由图 6可明显看出， 功能部分 30.2 (即弯片 30.2) 已经 发生了明显形变， 其形变是由于导光板 1的受热膨胀挤压所致。此时弯片 30.2的 几乎整个凹陷面 30.2.6都贴在了导光板 1的第二边缘 1.4上。 容易看出， 也容易 理解， 在导光板 1受热膨胀和弯片 30.2受压缩而形变的过程中， 弯片 30.2的端 部 30.2.〗始终紧密抵靠着导光板 1 的第二边缘 1.4。 以此方式， 在整个膨胀过程 中， 框体 2都可以通过缓冲件 30将导光板 1压住， 使其不会随便晃动。
图 7显示了根据本发明的导光板组件的第二实施例的框体 2。 与第一实施例 类似地， 在第二实施例中， 框体 2的朝向导光板 1的第二侧缘 1.4 (图中未示出， 但其位置位于框体 2的内部， 这很容易理解） 的位置处设置有缓冲件 40。
图 8显示了图 7中的框体 2的缓冲件 40的局部放大图。 在图 8所示的实施 例中， 缓冲件 40包括不能够发生弹性形变的支撑部分 40.1和能够发生弹性形变 的功能部分 40.2，支撑部分 40.1和功能部分 40.2在接合区域 40.3处接合为一体。 支撑部分 40.1构造为具有平坦表面的板状体 40.1 , 板状体 40.1具有相邻地位于 接合区域 40.3 的相对两侧的两个镂空区域 40丄 2， 功能部分 40.2的未与板状体
40.1 接合的部位在板状体 40.1 的平坦表面上的正投影全部落入镂空区域 40丄 2 中。 为了便于观察， 图中用阴影线表示了镂空区域 40丄 2, 也就是说， 阴影线所 覆盖的区域的板状体 40.1被挖空了。
上述这些技术特征与第一实施例中的相应技术特征并无本质差别， 签于其功 能和优点已在第一实施例中洋述， 在此处不再赘述。 下面将详细描述第二实施例 中本质性地区别于第一实施例的技术特征。
图 9显示了图 7中的框体沿着 B-B线的剖视图。 由图 9可看出， 与第一实施 例不同， 在第二实施例中， 功能部分 40.2构造为在板状体 40.1 的-一侧从接合区 域 40.3处延伸出来的折片 40.2, 折片 40.2的外角面 40.2.5面向板状体 2， 折片 40.2的内角面 40.2.6面向导光板 1 的第二侧缘 1.4。 在第二实施例中， 用语 "折 片"主要指其截面形状具有明显的折角， 而在其余部分大致为平坦表面的片体。 在第二实施例中， 缓冲件 40的功能部分 40.2整体上并非截面为圆滑弧形的 弯片， 而是具有弯折部 40.2.4的折片 40.2 (其截面形状具有明显的折角， 其余部 分大致为平坦表面）。
相较于弯片而言， 折片具有不同的力学性质。 二者发生形变的劲度系数、 在 板状体 30.1、 40.1的表面方向上的形变力度以及在板状体 30.1、 40, 1的法相方向 . --匕的形变力度都有所不同。 因此， 本发明提供了两种不同的选择， 可根据导光板 1的热膨胀系数以及框体 2的材质来选择合适的实施方案。
优选地， 折片 40.2的位于接合区域 40.3中的弯折部 40.2.4圆滑地设置。 因 为弯折部 40.2.4是折片 40.2最脆弱的部分，圆滑地设置可以分散由形变对弯折部
40.2.4造成的挤压力， 防止折片 40.2发生疲劳或断裂， 保证了整个缓冲件 40的 使用寿命。 折片 40.2可关于其弯折部 40.2.4对称。
优选地， 在折片 40.2的端部处具有朝向板状体 40.1弯曲的弧形区域 40.2.3， 而弧形区域 40.2.3的凸出面顶靠着导光板 1 的第二边缘 1.4。 整体而言， 弧形区 域 40.23仅仅位于折片 40.2的末端部分， 也就是说折片 40.2的大部分部位仍然 是平坦表面。 而弧形区域 40.23主要是为了构成一个较为平缓的承接部， 用于与 导光板 1的第二边缘 1.4紧密抵靠。在根据本发明的缓冲件 40中， 不论是自然状 态还是导光板 1热膨胀以后的状态， 这种紧密抵靠都会一直持续着， 因此通过将 弧形区域 40.2.3的圆滑的凸出面与导光板 1的第二边缘 1.4接触，弧形区域 40.2.3 给导光板 1的第二边缘 1.4所施加的压力相对柔和， 不易损坏导光板 1的第二边 缘 1.4 (反之而言也防止了折片 40.2 自身受损） 。 以此方式进一歩保障了缓冲件 40的使用寿命。
根据本发明的导光板组件， 由于在框体上设置了缓冲件：
一方面， 缓冲件的功能部分与导光板紧密抵靠， 二者之间并无间隙， 保证了 整个背光模组的光学效率； 同时， 使得用于固定导光板的框体能够紧密地固定住 导光板， 防止导光板发生晃动， 避免了因为晃动而对导光板上的光学膜造成摩擦 和刮伤。
另一方面， 由于缓冲件的功能部分能够发生弹性形变， 虽然导光板受热膨胀 后尺寸会变大， 这时因为功能部分弹性地被导光板压缩， 可以让出足够的空间用 来容纳导光板， 防止了导光板受到刚性压力的挤压而拱起， 保证了显示器的显示 品质。
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

权利要求书
1. 导光板组件， 所述导光板组件包括导光板和用于固定所述导光板的框体， 所述导光板具有用于引入光线的第一侧缘和不引入光线的第二侧缘， 所述框体至少局部地包围住所述导光板的第二侧缘，
其中， 在所述框体和所述导光板的第二侧缘之间设置有能够至少局部地发生 弹性形变的缓冲件。
2. 根据权利要求 1所述的导光板组件， 其中， 所述缓冲件包括不能够发生弹 性形变的支撑部分和能够发生弹性形变的功能部分， 所述支撑部分和所述功能部 分在接合区域接合为一体。
3. 根据权利要求 2所述的导光板组件， 其中， 所述支撑部分构造为具有平坦 表面的板状体， 所述板状体具有相邻地位于所述接合区域的相对两侧的两个镂空 区域， 所述功能部分的未与所述板状体相接合的部位在所述板状体的平坦表面上 的正投影全部落入所述镂空区域中。
4. 根据权利要求 3所述的导光板组件， 其中， 所述功能部分构造为在所述板 状体的一侧从所述接合区域延伸出来的弯片， 所述弯片的凸出面面向所述板状 体, 所述弯片的凹陷面面向所述导光板的第二侧缘。
5. 根据权利要求 4所述的导光板组件， 其中， 所述接合区域位于所述弯片的 顶点处， 所述弯片相对于其顶点所在的中央平面镜像对称， 所述中央平面与所述 板状体的平坦表面和所述导光板的表面均垂直。
6. 根据权利要求 5所述的导光板组件， 其中， 所述弯片在所述板状体的平坦 表面上的正投影为矩形， 且 A1 A2+D1， 其中
A1表示所述两个镂空区域的远离所述接合区域的末端边缘之间的距离； A2表示所述弯片的相对的两个末端边缘之间的距离； 以及
D1 表示所述弯片的末端边缘与所述板状体的朝向所述弯片的平坦表面之间 的距离。
7. 根据权利要求 3所述的导光板组件， 其中， 所述功能部分构造为在所述板 状体的一侧从所述接合区域延伸出来的折片， 所述折片的外角面面向所述板状 体， 所述折片的内角面面向所述导光板的第二侧缘。
8. 根据权利要求 7所述的导光板组件， 其中， 在所述折片的端部处具有朝向 所述板状体弯曲的弧形区域， 所述弧形区域的凸出面顶靠着所述导光板的第二边 缘。
9. 根据权利要求 7所述的导光板组件， 其中， 所述折片的位于所述接合区域 中的弯折部圆滑地设置。
10. 根据权利要求 2的导光板组件， 其中， 所述缓冲件的所述支撑部分与所 述框体一体成型。
PCT/CN2014/081028 2014-06-12 2014-06-27 导光板组件 Ceased WO2015188407A1 (zh)

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