TW201502666A - Reflecting frame and backlight unit - Google Patents
Reflecting frame and backlight unit Download PDFInfo
- Publication number
- TW201502666A TW201502666A TW103113703A TW103113703A TW201502666A TW 201502666 A TW201502666 A TW 201502666A TW 103113703 A TW103113703 A TW 103113703A TW 103113703 A TW103113703 A TW 103113703A TW 201502666 A TW201502666 A TW 201502666A
- Authority
- TW
- Taiwan
- Prior art keywords
- frame
- light guide
- side plate
- guide plate
- light
- Prior art date
Links
Classifications
-
- 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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- 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
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
Description
本發明係有關於一種用於液晶面板，導光板式之反射框架及背光單元。 The invention relates to a liquid crystal panel, a light guide plate type reflective frame and a backlight unit.
在液晶顯示裝置等中，使用由液晶層之背面側照光而發光之背光單元。近年來，特別增加採用可減少光源數，且有利於省能化之邊緣發光方式之背光單元。如此之邊緣發光方式之背光單元要求光射出面全體中均一之亮度。 In a liquid crystal display device or the like, a backlight unit that emits light by illuminating the back side of the liquid crystal layer is used. In recent years, a backlight unit that uses an edge light-emitting method that can reduce the number of light sources and is advantageous for energy saving has been particularly added. Such a backlight unit of the edge illumination method requires uniform brightness in the entire light exit surface.
在邊緣發光式背光單元之導光板上積層設置反射板。反射板具有使由光源導入導光板內之光中漏出至反射板側的部份返回液晶層側而提高亮度之功能。 A reflector is laminated on the light guide plate of the edge-lit backlight unit. The reflector has a function of returning a portion of the light introduced into the light guide plate from the light source to the side of the reflector to return to the liquid crystal layer side to increase the brightness.
如此之邊緣發光方式之背光單元具有形成在反射片上積層金屬板之反射板，且使反射板密接在導光板之底面及一對側面上的邊緣發光方式之背光構造。 The backlight unit of the edge light-emitting method has a backlight structure in which a reflection plate of a metal plate is formed on a reflection sheet, and the reflection plate is closely adhered to the bottom surface and the pair of side surfaces of the light guide plate.
專利文獻1：日本特開2008-166200號公報 Patent Document 1: Japanese Laid-Open Patent Publication No. 2008-166200
另一方面，由於省能之要求，故尋求背光單元之消耗電力之降低。對此，如果可使背光單元之亮度提高，則可減少光源之使用，且可降低消耗電力。用以提高背光單元之亮度之方法中之一方法包括減少漏光。藉由抑制由導光板之側面，及光源與反射器之間隙的漏光，可提高背光單元之亮度。 On the other hand, due to the energy saving requirement, the power consumption of the backlight unit is sought to be reduced. In this regard, if the brightness of the backlight unit can be increased, the use of the light source can be reduced, and power consumption can be reduced. One of the methods for increasing the brightness of the backlight unit includes reducing light leakage. The brightness of the backlight unit can be improved by suppressing light leakage from the side surface of the light guide plate and the gap between the light source and the reflector.
在專利文獻1中，由形成在反射板上之孔射入來自光源之光。因此，反射器與反射板形成為一體。但是，如專利文獻1地彎折加工反射板，無法防止由彎折部之間隙的漏光。特別地，積層金屬板及反射薄膜之反射板產生因來自光源之熱造成之熱膨脹或熱膨脹之差之影響產生之翹曲或變形，恐有增大漏光之虞。 In Patent Document 1, light from a light source is incident from a hole formed in a reflecting plate. Therefore, the reflector is formed integrally with the reflecting plate. However, as in Patent Document 1, the reflection plate is bent, and light leakage from the gap of the bent portion cannot be prevented. In particular, the laminated metal plate and the reflecting plate of the reflective film generate warpage or deformation due to the difference in thermal expansion or thermal expansion caused by heat from the light source, and there is a fear that the light leakage is increased.
本發明係有鑒於如此之問題而作成者，且目的在於提供一種可提高背光單元之亮度之反射框架等。 The present invention has been made in view of such problems, and an object thereof is to provide a reflection frame or the like which can improve the brightness of a backlight unit.
為達到前述目的，第一發明係一種反射框架，係用於由樹脂發泡體構成之背光單元者，其特徵在於：前述反射框架係呈其中一面開口，而可收容導光板之箱型；又，在側板部形成有光源用之孔；且前述側板部彼此之邊界係呈無間隙地封閉狀態。 In order to achieve the above object, the first invention is a reflective frame for a backlight unit composed of a resin foam, wherein the reflective frame has a box shape in which one side is open and can accommodate a light guide plate; A hole for the light source is formed in the side plate portion; and the boundary between the side plate portions is closed without a gap.
如此，本發明由於反射框架係由樹脂發泡體形成，故沒有如熱膨脹率不同之素材之金屬板及反射薄膜積層之反射板的翹曲及變形等問題。 As described above, in the present invention, since the reflective frame is formed of a resin foam, there are no problems such as warpage and deformation of the metal plate of the material having different thermal expansion rates and the reflection plate laminated with the reflective film.
又，由於樹脂發泡體具有因熱微小地收縮之特性，故由樹脂發泡體形成之本發明反射框架具有由於在使用背光面板時產生之熱在密接於導光板之方向上尺寸變化之傾向。因此依據本發明之由樹脂發泡體形成之箱型反射框架，可進一步減少由背光面板之漏光。 Further, since the resin foam has a characteristic of being slightly contracted by heat, the reflective frame of the present invention formed of the resin foam has a tendency to change in size in a direction in which the heat generated when the backlight panel is used is adhered to the light guide plate. . Therefore, according to the box type reflection frame formed of the resin foam of the present invention, light leakage by the backlight panel can be further reduced.
又，由於反射框架呈箱型，且在反射框架之側板部彼此之邊界未形成間隙，故沒有由間隙之漏光，而可得到高亮度。因此，可減少光源及消耗電力。 Further, since the reflection frame has a box shape and no gap is formed at the boundary between the side plate portions of the reflection frame, light leakage from the gap is not obtained, and high luminance can be obtained. Therefore, the light source and power consumption can be reduced.
前述反射框架宜為將樹脂發泡素材成形為模具形狀，且係全部之面為整體連續之箱型。 The reflective frame is preferably a box shape in which the resin foamed material is formed into a mold shape, and the entire surface is continuous.
如此，藉由一體成形反射框架，製造性良好，且確實地封閉側板部彼此之邊界的間隙。 As described above, by integrally molding the reflection frame, the manufacturability is good, and the gap between the boundary portions of the side plate portions is surely closed.
前述反射框架亦可將呈箱形狀展開後之形狀的樹脂發泡素材彎折成箱形狀，且以封閉藉由相鄰接之側板部形成之角部的方式互相接合該等側板部。 The reflective frame may be formed by bending a resin foamed material having a shape in a box shape into a box shape, and joining the side plate portions so as to close the corner portions formed by the adjacent side plate portions.
如此，互相接合該等側板部之裝置包括膠帶或接著劑。如果互相接合側板部，則可阻塞彎折素材產生之間隙，而可減少由角部之漏光。 As such, the means for joining the side panels to each other includes an adhesive tape or an adhesive. If the side plate portions are joined to each other, the gap generated by the bending material can be blocked, and light leakage from the corner portions can be reduced.
前述側板部彼此之接合可採用在側板部設置舌片，且在將前述樹脂發泡素材彎折成箱形狀時，使前述舌片與相鄰接之側板部重疊之手段。 The joining of the side plate portions to each other may be performed by providing a tongue piece in the side plate portion and overlapping the tongue piece with the adjacent side plate portion when the resin foam material is bent into a box shape.
如此，藉由設置舌片且折回至側板部彼止之邊界，可以素材本身確實地阻塞彎折素材產生之間隙，而可減少由角部之漏光。 In this way, by providing the tongue and folding back to the boundary of the side plate portion, the material itself can surely block the gap generated by the bending material, and the light leakage from the corner portion can be reduced.
前述反射框架之內面宜形成用以防止與導光板密接之凸部。 The inner surface of the reflective frame is preferably formed to prevent the convex portion from being in close contact with the light guide plate.
藉由如此設置防止密接之凸部，可防止因導光板與反射板之密接而使部份地光聚光反射所產生之白點的發生。 By providing the convex portions that are prevented from being in contact with each other, it is possible to prevent the occurrence of white spots caused by partial light condensing reflection due to the close contact between the light guide plate and the reflecting plate.
前述反射框架宜由已使非結晶性熱可塑性樹脂片發泡而成之樹脂發泡素材形成。 The reflective frame is preferably formed of a resin foamed material obtained by foaming an amorphous thermoplastic resin sheet.
例如，如聚碳酸酯之已使非結晶性熱可塑性樹脂片發泡而成之樹脂發泡素材具有良好成形性。因此，可容易成形加工成反射框架所希望之形狀。特別地，亦可容易在成形素材時形成用以防止前述密接之凸部。 For example, a resin foamed material obtained by foaming a non-crystalline thermoplastic resin sheet such as polycarbonate has good formability. Therefore, it can be easily formed into a desired shape of the reflective frame. In particular, it is also easy to form a convex portion for preventing the aforementioned adhesion when the material is formed.
第二發明係一種背光單元，其特徵在於包含：第一發明之反射框架；收容在箱型之前述反射框架內部之導光板；及從設於前述反射框架之側板部的孔照射光至前述導光板的光源。 A second invention is a backlight unit, comprising: a reflective frame of the first invention; a light guide plate housed inside the reflective frame of the box type; and a light from the hole provided in the side plate portion of the reflective frame to the guide The light source of the light panel.
如此之背光單元由於亮度高，故與習知比較可減少光源之個數。因此，可降低成本及消耗電力。 Such a backlight unit has a high brightness, so that the number of light sources can be reduced as compared with the conventional one. Therefore, the cost and power consumption can be reduced.
依據本發明，可提供可提高背光單元之亮度之反射框架等。 According to the present invention, a reflection frame or the like which can increase the brightness of the backlight unit can be provided.
1,1a,1b,1c‧‧‧背光單元 1,1a, 1b, 1c‧‧‧ backlight unit
3‧‧‧背面底盤 3‧‧‧Back chassis
5,5a,5b,5c‧‧‧反射框架 5,5a,5b,5c‧‧‧reflection frame
7a,7b‧‧‧側板部 7a, 7b‧‧‧ side panel
7t‧‧‧底面 7t‧‧‧ bottom
9‧‧‧孔 9‧‧‧ hole
11‧‧‧光源 11‧‧‧Light source
13‧‧‧導光板 13‧‧‧Light guide plate
15‧‧‧光學薄膜 15‧‧‧Optical film
17,17a,17b,17c‧‧‧樹脂發泡素材 17,17a,17b,17c‧‧‧Resin foam material
18a‧‧‧上模 18a‧‧‧上模
18b‧‧‧下模 18b‧‧‧下模
19‧‧‧膠帶 19‧‧‧ Tape
21‧‧‧舌片 21‧‧‧ tongue
23‧‧‧珠粒 23‧‧‧ beads
25‧‧‧微細氣泡 25‧‧‧Microbubbles
27‧‧‧發泡層 27‧‧‧Foam layer
28‧‧‧珠粒塗層 28‧‧‧Bead coating
29‧‧‧未發泡層 29‧‧‧Unfoamed layer
31‧‧‧凸部 31‧‧‧ convex
B‧‧‧箭號 B‧‧‧Arrow
C‧‧‧間隔 C‧‧‧ interval
圖1係顯示背光單元1之構造之分解立體圖。 FIG. 1 is an exploded perspective view showing the configuration of the backlight unit 1.
圖2(a)係背光單元1之截面圖，圖2(b)係圖2(a)之A部放大圖。 2(a) is a cross-sectional view of the backlight unit 1, and FIG. 2(b) is an enlarged view of a portion A of FIG. 2(a).
圖3係背光單元1b之截面圖。 3 is a cross-sectional view of the backlight unit 1b.
圖4(a)係顯示成形樹脂發泡素材17c前之狀態的部份截面圖，圖4(b)係顯示已藉由上模18a及下模18b成形反射框架5之狀態的部份截面圖，圖4(c)係背光單元1c之截面圖。 Fig. 4 (a) is a partial cross-sectional view showing a state before the molded resin foamed material 17c, and Fig. 4 (b) is a partial cross-sectional view showing a state in which the reflective frame 5 has been formed by the upper mold 18a and the lower mold 18b. 4(c) is a cross-sectional view of the backlight unit 1c.
圖5係顯示另一實施形態之圖，圖5(a)係樹脂發泡素材17之展開圖，圖5(b)係顯示反射框架5a之立體圖。 Fig. 5 is a view showing another embodiment, Fig. 5(a) is a developed view of the resin foamed material 17, and Fig. 5(b) is a perspective view showing the reflective frame 5a.
圖6係顯示另一實施形態之圖，圖6(a)係樹脂發泡素材17a之展開圖，圖6(b)係顯示反射框架5b之立體圖。。 Fig. 6 is a view showing another embodiment, Fig. 6(a) is a developed view of the resin foamed material 17a, and Fig. 6(b) is a perspective view showing the reflective frame 5b. .
圖7係顯示另一實施形態之圖，且係樹脂發泡素材17b之展開圖。 Fig. 7 is a view showing another embodiment, and is a developed view of the resin foamed material 17b.
圖8(a)係背光單元1a之截面圖，圖8(b)係圖8(a)之B部放大圖。 Fig. 8(a) is a cross-sectional view of the backlight unit 1a, and Fig. 8(b) is an enlarged view of a portion B of Fig. 8(a).
(實施形態1) (Embodiment 1)
以下，一面參照圖式，一面說明本發明之實施形態。圖1係顯示用於液晶顯示裝置等之背光單元1之分解立體圖，圖2係截面圖。背光單元1係所謂邊緣發光方式之背光單元，且主要是由反射框架5、光源11、導光板13等構成。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is an exploded perspective view showing a backlight unit 1 for a liquid crystal display device or the like, and FIG. 2 is a cross-sectional view. The backlight unit 1 is a backlight unit of an edge light-emitting type, and is mainly composed of a reflection frame 5, a light source 11, a light guide plate 13, and the like.
反射框架5係箱形狀之構件。反射框架5係在內部具有獨立氣泡之多孔質體，且藉由樹脂發泡體形成。反射 框架5係使用片狀樹脂發泡素材一體成形。因此，反射框架5之全部之面(底面及側板部7a、7b)之邊界係皆無間隙地一體成形。 The reflective frame 5 is a box-shaped member. The reflection frame 5 is a porous body having closed cells inside, and is formed of a resin foam. reflection The frame 5 is integrally molded using a sheet-like resin foamed material. Therefore, the boundary between the entire surface (the bottom surface and the side plate portions 7a, 7b) of the reflection frame 5 is integrally formed without any gap.
如圖2(a)所示，反射框架5之表面(與導光板13之對向面)設有多數珠粒23。珠粒23係，例如，矽粒子或碳酸鈣粒子。在圖1中，省略珠粒23之圖示。 As shown in FIG. 2(a), the surface of the reflection frame 5 (opposite to the light guide plate 13) is provided with a plurality of beads 23. Beads 23 are, for example, cerium particles or calcium carbonate particles. In Fig. 1, the illustration of the beads 23 is omitted.
如圖2(b)所示，反射框架5在內部具有發泡層27，且在表面背面具有未發泡層29。又，未發泡層29亦可只形成在與導光板13之對向面。發泡層27中形成有多數微細氣泡25。微細氣泡25之平均直徑係0.1至10.0μm時，反射框架5之反射率良好。未發泡層29中不存在微細氣泡25，或，即使假設有的話，與發泡層27比較，其量亦非常少。 As shown in FIG. 2(b), the reflection frame 5 has a foam layer 27 inside and an unfoamed layer 29 on the back surface. Further, the unfoamed layer 29 may be formed only on the opposite side to the light guide plate 13. A plurality of fine bubbles 25 are formed in the foam layer 27. When the average diameter of the fine bubbles 25 is 0.1 to 10.0 μm, the reflectance of the reflective frame 5 is good. The fine bubbles 25 are not present in the unfoamed layer 29, or even if it is present, the amount is very small as compared with the foamed layer 27.
反射框架5(未發泡層29)之表面上設有珠粒塗層28。珠粒塗層28係藉由塗布混合珠粒23之塗布劑形成。又，如果可保持珠粒23在反射框架5之表面，則不一定需要珠粒塗層28。 A bead coating 28 is provided on the surface of the reflective frame 5 (unfoamed layer 29). The bead coating 28 is formed by coating a coating agent that mixes the beads 23. Also, if the beads 23 can be kept on the surface of the reflective frame 5, the bead coating 28 is not necessarily required.
珠粒23在反射框架5之表面形成凸部。又，珠粒23之形狀可為球體、橢圓體、多面體等各種立體形狀，但是最好是球體。 The beads 23 form a convex portion on the surface of the reflection frame 5. Further, the shape of the beads 23 may be various three-dimensional shapes such as a sphere, an ellipsoid, and a polyhedron, but is preferably a sphere.
用於反射框架5之樹脂發泡素材係使熱可塑性樹脂片發泡而形成。又，在本發明中使用之熱可塑性樹脂沒有特別限制，但是可使用聚對苯二甲酸乙二酯等之結晶性熱可塑性聚酯樹脂作為結晶性之熱可塑性樹脂，且使用 聚碳酸酯作為非結晶性之熱可塑性樹脂。特別地，當考慮樹脂發泡素材之成形性時，最好是聚碳酸酯。 The resin foaming material for the reflection frame 5 is formed by foaming a thermoplastic resin sheet. Further, the thermoplastic resin used in the present invention is not particularly limited, but a crystalline thermoplastic polyester resin such as polyethylene terephthalate can be used as the crystalline thermoplastic resin, and used. Polycarbonate is used as a non-crystalline thermoplastic resin. In particular, when considering the formability of the resin foamed material, polycarbonate is preferred.
就樹脂發泡素材之製造方法詳細將於後述。 The method for producing the resin foamed material will be described in detail later.
反射框架5之各個側板部7b之外面配置光源11。光源11可使用，例如，LED(發光二極體；Light Emitting Diode)、CCFL(冷陰極螢光燈；Cold Cathode Fluorescent Lamp)等，且藉由配置如LED之點光源成一列，或將該等配置成線狀或面狀構成。 The light source 11 is disposed on the outer surface of each of the side plate portions 7b of the reflection frame 5. The light source 11 can be used, for example, an LED (Light Emitting Diode), a CCFL (Cold Cathode Fluorescent Lamp), or the like, and is arranged in a column by configuring a point source such as an LED, or the like It is configured in a line or a plane.
反射框架5之對向的一對側板部7b分別附設貫穿側板部7b之多數孔9。孔9係配置光源11之點光源之部位。因此，孔9係形成於對應光源11之各點光源之位置。此外，孔9宜為孔加工成不受點光源之熱影響之大小。孔尺寸小時受到點光源之熱影響，且恐有反射框架5變形之虞。 A plurality of holes 9 penetrating through the side plate portion 7b are attached to the pair of side plate portions 7b facing each other of the reflection frame 5. The hole 9 is a portion where the point light source of the light source 11 is disposed. Therefore, the holes 9 are formed at positions corresponding to the respective point light sources of the light source 11. In addition, the apertures 9 are preferably sized such that the apertures are not affected by the thermal effects of the point source. The pore size is affected by the heat of the point source, and there is fear that the reflection frame 5 is deformed.
導光板13收容在反射框架5中。即，反射框架5呈可收容導光板13之箱形狀。導光板13呈平板狀，且光之射出面(在圖2之上面側配置省略圖示之液晶面板之側)係平滑地構成。導光板13可使用，例如，丙烯酸系樹脂、聚碳酸酯樹脂、環狀烯烴樹脂等之高導光性透明素材。 The light guide plate 13 is housed in the reflection frame 5. That is, the reflection frame 5 has a box shape in which the light guide plate 13 can be housed. The light guide plate 13 has a flat plate shape, and the light exit surface (the side on which the liquid crystal panel (not shown) is disposed on the upper surface side of FIG. 2) is smoothly formed. As the light guide plate 13, for example, a highly light-transmitting transparent material such as an acrylic resin, a polycarbonate resin or a cyclic olefin resin can be used.
又，在導光板13之背面側(在圖2之下面側，反射框架5側)，亦可實施利用光擴散用之白色墨水等產生之擴散圖案，及微細凹凸加工等。藉此，可使由線狀光源或點光源射入之光，藉由光射出面均一且有效率地面發光。 Further, on the back side of the light guide plate 13 (on the lower side of FIG. 2, on the side of the reflection frame 5), a diffusion pattern generated by white ink or the like for light diffusion, fine graining processing, or the like may be used. Thereby, the light incident from the linear light source or the point light source can be uniformly illuminated by the light exit surface and efficiently.
在導光板13之光之射出面側可依需要設置光學 薄膜15。光學薄膜15係積層具有多數功能之薄膜而構成。例如，可使用用以使背光單元1之表面亮度均一之光擴散薄膜，及用以提高亮度之稜鏡片等。 Optical can be set as needed on the exit surface side of the light of the light guide plate 13 Film 15. The optical film 15 is formed by laminating a film having a plurality of functions. For example, a light-diffusing film for uniformizing the surface brightness of the backlight unit 1, and a ruthenium or the like for improving the brightness can be used.
藉由背面底盤3保持以上反射框架5、光源11、導光板13、光學薄膜15。背面底盤3係藉由例如板金沖壓加工製造。藉由使用如此形成之背光單元1，在前面配置液晶面板(省略圖示)，且利用前面底盤(省略圖示)嵌合、固定，製造液晶顯示裝置。 The above reflective frame 5, the light source 11, the light guide plate 13, and the optical film 15 are held by the back chassis 3. The back chassis 3 is manufactured by, for example, sheet metal stamping. By using the backlight unit 1 thus formed, a liquid crystal panel (not shown) is disposed on the front surface, and a liquid crystal display device is manufactured by fitting and fixing the front chassis (not shown).
(樹脂發泡素材之製造方法) (Method of manufacturing resin foam material)
接著，說明樹脂發泡素材之製造方法。樹脂發泡片之製法包括延伸法、批式發泡法、擠出發泡法等。例如，為藉批式發泡法製造由聚碳酸酯形成之發泡片，首先，使用混合機熔融混合非結晶性熱可塑性樹脂之聚碳酸酯樹脂(Sumika Styron製PCX-5771)與熔融型結晶化核劑(新日本理化製NU100)之混合物，製作樹脂組成物。接著，使用擠出機等成形樹脂組成物為片狀，且重疊該樹脂片與分離件，並且捲繞成捲狀。 Next, a method of producing a resin foamed material will be described. The method for producing the resin foamed sheet includes an elongation method, a batch foaming method, an extrusion foaming method, and the like. For example, in order to produce a foamed sheet formed of polycarbonate by a batch foaming method, first, a polycarbonate resin (PCX-5771 manufactured by Sumika Styron) and a molten crystal which are melt-mixed with a non-crystalline thermoplastic resin using a mixer are used. A mixture of a nucleating agent (Nippon Chemical and Chemical Co., Ltd. NU100) was used to prepare a resin composition. Next, a molded resin composition such as an extruder is used in the form of a sheet, and the resin sheet and the separator are stacked and wound into a roll shape.
藉由保持該捲於加壓惰性氣體環境中，使樹脂片含有惰性氣體。又，在常壓下加熱含有惰性氣體之樹脂片至聚碳酸酯樹脂之玻璃轉移溫度(Tg)以上而使其發泡。如此可得到微細發泡聚碳酸酯片。 The resin sheet contains an inert gas by keeping the coil in a pressurized inert gas atmosphere. Further, the resin sheet containing an inert gas is heated under normal pressure to a glass transition temperature (Tg) of the polycarbonate resin to be foamed. Thus, a finely foamed polycarbonate sheet can be obtained.
又，上述製造方法係一例，且本發明不特別限定於樹脂發泡素材之原料或製造方法。 Further, the above production method is an example, and the present invention is not particularly limited to a raw material or a production method of a resin foamed material.
又，可使預先混入珠粒23於素材組成中者發泡，或者， 亦可在製造樹脂發泡素材後，將珠粒23混合於塗布劑中且塗布在樹脂發泡素材表面上。 Further, it is possible to foam the beads 23 in advance in the composition of the material, or After the resin foaming material is produced, the beads 23 may be mixed in a coating agent and coated on the surface of the resin foamed material.
在後程序中進行熱成形之情形方面，最好是將珠粒23預先混入素材組成中，且發泡之製法，但是樹脂發泡素材之製法使用所謂延伸法時，由於恐有在延伸時珠粒23脫落之虞，故最好在發泡處理後塗布珠粒23。 In the case of performing hot forming in the post-process, it is preferable to mix the beads 23 in advance in the composition of the material, and to foam the method, but when the resin foaming material is produced by the so-called stretching method, it is feared that the beads are extended. Since the granules 23 are detached, it is preferable to coat the beads 23 after the foaming treatment.
(反射框架之製造方法) (Method of manufacturing reflective frame)
接著，說明反射框架5之成形方法。首先，預備加熱藉前述方法製造之微細發泡聚碳酸酯片。預備加熱係在微細發泡聚碳酸酯片上方及下方對向配置遠紅外線加熱器來進行。 Next, a method of forming the reflection frame 5 will be described. First, the finely foamed polycarbonate sheet produced by the above method is prepared for heating. The preliminary heating is performed by arranging the far-infrared heater oppositely above and below the finely foamed polycarbonate sheet.
微細發泡聚碳酸酯片由於是非結晶性樹脂，故恐有在發泡程序中形成之內部氣泡因熱膨脹，且在片表面產生所謂***之現象之虞。因此，在6至10秒之短時間內，進行預備加熱。加熱溫度宜預熱成使放射溫度計之片表面溫度為玻璃轉移溫度附近之溫度的150至160℃。這是因為在150℃以下容易產生成形破裂，且在160℃以上容易產生粗大氣泡或***。 Since the finely foamed polycarbonate sheet is an amorphous resin, there is a fear that the internal bubbles formed in the foaming process are thermally expanded and a so-called bulging phenomenon occurs on the surface of the sheet. Therefore, preliminary heating is performed in a short time of 6 to 10 seconds. The heating temperature is preferably preheated so that the sheet surface temperature of the radiation thermometer is 150 to 160 ° C at a temperature near the glass transition temperature. This is because the formation fracture is likely to occur at 150 ° C or lower, and coarse bubbles or bulges are likely to occur at 160 ° C or higher.
接著，將經預熱之微細發泡聚碳酸酯片搬送至加熱模具中。微細發泡聚碳酸酯片係，例如，藉由上下之加熱模具夾入，且藉由成形為預定形狀之配合模製成形方式成形為箱型。成形後，使用空氣流冷卻，藉此製造箱形狀之反射框架5。 Next, the preheated finely foamed polycarbonate sheet is transferred to a heating mold. The finely foamed polycarbonate sheet is formed into a box shape by, for example, being sandwiched by a heating mold which is formed by a top and bottom, and formed into a shape by a molding which is formed into a predetermined shape. After forming, it is cooled using an air flow, thereby manufacturing a box-shaped reflective frame 5.
又，模具之加熱溫度宜為在不能由預熱溫度冷 卻成急冷狀態之情形下聚碳酸酯之玻璃轉移溫度以下之溫度的100至120℃。模具之溫度超過玻璃轉移溫度以上之溫度的160℃時，恐有與預熱相同地產生內部氣泡之膨脹，且在成形表面產生***之虞。又，為在成形後防止變形，宜冷卻至60℃。 Also, the heating temperature of the mold should be such that it cannot be cooled by the preheating temperature. In the case of a quenching state, the temperature below the glass transition temperature of the polycarbonate is 100 to 120 °C. When the temperature of the mold exceeds 160 ° C of the temperature higher than the glass transition temperature, expansion of internal bubbles may occur in the same manner as preheating, and ridges may occur on the formed surface. Further, in order to prevent deformation after molding, it is preferred to cool to 60 °C.
又，使用聚對苯二甲酸乙二酯樹脂時，預熱溫度可為200至220℃，且模具溫度可為170至180℃。 Further, when a polyethylene terephthalate resin is used, the preheating temperature may be 200 to 220 ° C, and the mold temperature may be 170 to 180 °C.
反射框架5之成形方法不限於配合模製方法。例如，亦可為依據成形品形狀或尺寸精度，使用1凹或凸形狀之模具的加壓成形、真空成形、真空加壓成形及使用柱塞拉伸片後進行成形之柱塞輔助真空成形、柱塞輔助加壓成形、柱塞輔助真空加壓成形等習知成形方法。但是，片成形中模轉印性最佳的是配合模製成形方式。 The forming method of the reflecting frame 5 is not limited to the fitting molding method. For example, press forming, vacuum forming, vacuum press forming, and plunger assisted vacuum forming using a concave or convex mold according to the shape or dimensional accuracy of the molded article may be used. Conventional forming methods such as plunger assisted press forming and plunger assisted vacuum press forming. However, in the sheet forming, the optimum transferability of the mold is in the form of a molding.
如此製造導光板13嵌入中間之箱形狀的反射框架5。該反射框架5之側板部及底面之各面的邊界係呈一體，且被封閉。因此，可防止由導光板13之側面之漏光。又，為由光源11及反射框架5等之接觸面抑制光之損失，宜在光源11之表面施加白色塗料(TAIYO INK製LED顯像型高反射白色阻焊劑)，或使用白色反射基板(新神戶電機CEL-447WT)。 The reflective frame 5 in which the light guide plate 13 is embedded in the middle of the box shape is thus manufactured. The boundary between each of the side plate portion and the bottom surface of the reflection frame 5 is integrated and closed. Therefore, light leakage from the side of the light guide plate 13 can be prevented. Further, in order to suppress the loss of light by the contact faces of the light source 11 and the reflection frame 5, it is preferable to apply a white paint (a LED reflection type high reflection white solder resist by TAIYO INK) to the surface of the light source 11, or use a white reflective substrate (new Kobe Motor CEL-447WT).
(背光單元之功能) (function of backlight unit)
接著，說明背光單元1之功能。由光源11發出之光射入導光板13之內部。射入導光板13內部之光線由於存在導光板13前面之空氣層在界面全反射。另一方面，由導光板13 背面射出之光之一部份在反射框架5之表面反射，且返回導光板13內。 Next, the function of the backlight unit 1 will be described. Light emitted from the light source 11 enters the inside of the light guide plate 13. The light incident into the inside of the light guide plate 13 is totally reflected at the interface due to the presence of the air layer in front of the light guide plate 13. On the other hand, by the light guide plate 13 A portion of the light emitted from the back surface is reflected on the surface of the reflective frame 5 and returned to the light guide plate 13.
又，射入反射框架5內之光在與多數微細氣泡25(內部係例如空氣層，且折射率比構成反射框架5之樹脂小)之界面全反射或擴散，且在導光板13側射出。如此，在反射框架5之表面反射或在內部擴散之光返回導光板13內，且一部份在導光板13之前面再全反射，並且剩餘之光在導光板13之前面射出。如此可由背光單元之前面全體均一地射出光。 Further, the light incident on the reflection frame 5 is totally reflected or diffused at the interface with the plurality of fine bubbles 25 (the internal layer is, for example, an air layer, and the refractive index is smaller than the resin constituting the reflection frame 5), and is emitted toward the light guide plate 13 side. Thus, the light reflected or diffused inside the surface of the reflective frame 5 is returned to the light guide plate 13, and a portion is totally totally reflected before the light guide plate 13, and the remaining light is emitted in front of the light guide plate 13. In this way, light can be uniformly emitted from the entire front surface of the backlight unit.
此時，在反射框架5及導光板13之間，藉由珠粒23維持預定之狹小間隙。因此，不會因導光板13與反射框架5之面接觸等產生白點等。因此，對導光板13之前面全體，可確保均一之亮度。 At this time, a predetermined narrow gap is maintained by the beads 23 between the reflection frame 5 and the light guide plate 13. Therefore, white spots or the like are not generated due to contact of the light guide plate 13 with the surface of the reflection frame 5 or the like. Therefore, uniform brightness can be ensured for the entire front surface of the light guide plate 13.
該實施形態之反射框架5係以覆蓋導光板13之側面的方式成形為箱型，且不使用金屬板等而是藉本身維持收容導光板13之形狀，因此可避免因熱膨脹率不同而產生翹曲，且可減輕由與導光板之間隙漏光之問題。 The reflection frame 5 of the embodiment is formed into a box shape so as to cover the side surface of the light guide plate 13, and the shape of the light guide plate 13 is maintained by itself without using a metal plate or the like. Therefore, it is possible to avoid warpage due to the difference in thermal expansion rate. The music can reduce the problem of light leakage from the gap with the light guide plate.
又，該實施形態之反射框架5係藉由具有因熱微小地收縮之特性之樹脂發泡體形成，因此在供背光單元1使用時，因由電氣部件等產生之熱，反射框架5在密接於導光板13之方向上尺寸變化。結果，反射框架5及導光板13之間隙(特別是側部)會更狹窄，且可期待漏光減少。 Further, since the reflection frame 5 of the embodiment is formed of a resin foam having a property of being slightly contracted by heat, when the backlight unit 1 is used, the reflection frame 5 is in close contact with heat generated by an electric component or the like. The size of the light guide plate 13 changes in the direction. As a result, the gap (particularly the side portion) of the reflection frame 5 and the light guide plate 13 is narrower, and leakage reduction can be expected.
又，該實施形態之反射框架5係在相鄰接之側板部彼此之邊界沒有間隙，且相鄰接之側板部構成之角部係呈封閉 狀態。因此，可更高度地抑制由導光板13之側面的漏光。 Further, in the reflection frame 5 of this embodiment, there is no gap between the adjacent side plate portions, and the corner portions formed by the adjacent side plate portions are closed. status. Therefore, light leakage from the side surface of the light guide plate 13 can be suppressed more highly.
又，如圖2(a)所示，在反射框架5之內面全面設置珠粒23時，導光板13等之側面與反射框架5之側板部7b(7a)之間亦維持利用珠粒23產生之間隙。此時，藉由膠帶或框板等，可防止由導光板13等之側面之漏光。 Further, as shown in Fig. 2(a), when the beads 23 are entirely provided on the inner surface of the reflection frame 5, the side faces of the light guide plate 13 and the side plate portion 7b (7a) of the reflection frame 5 are also maintained by the beads 23 The gap created. At this time, light leakage from the side surface of the light guide plate 13 or the like can be prevented by an adhesive tape, a frame plate or the like.
又，雖然已說明前述實施形態1之珠粒23全面地存在之反射框架5，但是亦可如圖3顯示之背光單元1b所示，珠粒23只存在反射框架5內側之底面7t。如此之反射框架可藉由在將樹脂發泡素材成形為箱型後，只在底面7t塗布混合珠粒之塗料來製造。此時，可使反射框架5之側板部7b(7a)與導光板13等之側面密接，因此可防止由導光板13之側面漏光。 Further, although the reflection frame 5 in which the beads 23 of the first embodiment described above are entirely present has been described, the beads 23 may be present only on the bottom surface 7t of the inner side of the reflection frame 5 as shown by the backlight unit 1b shown in FIG. Such a reflection frame can be produced by coating a resin foam material into a box shape and applying a coating material of the mixed beads only on the bottom surface 7t. At this time, the side plate portion 7b (7a) of the reflection frame 5 can be brought into close contact with the side surface of the light guide plate 13 or the like, so that light leakage from the side surface of the light guide plate 13 can be prevented.
又，亦可使用珠粒23全面地存在之樹脂發泡素材，且在配合模製成形時只在內側之底面7t形成凸部。此時，首先，如圖4(a)所示，將珠粒23設在其中一面之全面之樹脂發泡素材17c固定在上模18a與下模18b之間。 Further, a resin foamed material in which the beads 23 are entirely present may be used, and when the molding is carried out, the convex portions are formed only on the inner bottom surface 7t. At this time, first, as shown in Fig. 4 (a), the entire resin foamed material 17c on which one side of the beads 23 is provided is fixed between the upper mold 18a and the lower mold 18b.
接著，使上模18a下降(圖4(a)之箭號B)，成形箱型之反射框架5(圖4(b))。此時，對應於側板部7b(7a)之位置之上模18a與下模18b之間隔C係設定成比對應於底面7t之部位之間隔狹窄。更詳而言之，對應於側板部7b(7a)之部份之間隔C係只考慮側板部7b之樹脂厚度來調整。又，對應於底面7t之部份之間隔，除了底面7t之樹脂厚度以外亦考慮珠粒23之突出部份來調整。因此，在側板部7b(7a)中，一部份由樹脂發泡素材17c露出，且在表面形成凸部 之珠粒23塞入樹脂之內部。結果，側板部7b(7a)之內面呈大略平坦狀。 Next, the upper mold 18a is lowered (arrow B of Fig. 4(a)), and the box-shaped reflection frame 5 is formed (Fig. 4(b)). At this time, the interval C between the upper mold 18a and the lower mold 18b corresponding to the position of the side plate portion 7b (7a) is set to be narrower than the interval between the portions corresponding to the bottom surface 7t. More specifically, the interval C corresponding to the portion of the side plate portion 7b (7a) is adjusted only in consideration of the resin thickness of the side plate portion 7b. Further, the interval corresponding to the portion of the bottom surface 7t is adjusted in consideration of the protruding portion of the bead 23 in addition to the resin thickness of the bottom surface 7t. Therefore, in the side plate portion 7b (7a), a part is exposed by the resin foamed material 17c, and a convex portion is formed on the surface. The beads 23 are stuffed into the interior of the resin. As a result, the inner surface of the side plate portion 7b (7a) is substantially flat.
圖4(c)顯示使用如此形成之反射框架5之背光單元1c。背光單元1c係在底面7t形成珠粒23產生之凸部，防止導光板13與反射框架5接觸。另一方面，側板部7b(7a)由於珠粒23被埋入，故內面呈大略平坦狀，可防止在側板部7b(7a)與導光板13等之間形成間隙。結果，可使反射框架5之側板部7b(7a)與導光板13等之側面密接，因此可防止由導光板13之側面漏光。 Fig. 4(c) shows the backlight unit 1c using the reflection frame 5 thus formed. The backlight unit 1c forms a convex portion generated by the beads 23 on the bottom surface 7t, and prevents the light guide plate 13 from coming into contact with the reflection frame 5. On the other hand, since the side plate portion 7b (7a) is embedded in the beads 23, the inner surface is substantially flat, and it is possible to prevent a gap from being formed between the side plate portion 7b (7a) and the light guide plate 13 or the like. As a result, the side plate portion 7b (7a) of the reflection frame 5 can be brought into close contact with the side surface of the light guide plate 13 or the like, so that light leakage from the side surface of the light guide plate 13 can be prevented.
(實施形態2) (Embodiment 2)
接著，說明反射框架之另一實施形態。又，在以下說明中，就具有與反射框架5等相同功能之構造，賦予與圖1至圖4相同之符號，且省略重複之說明。 Next, another embodiment of the reflection frame will be described. In the following description, the same functions as those of the reflection frame 5 and the like are denoted by the same reference numerals as those in FIGS. 1 to 4, and the description thereof will not be repeated.
如圖5(a)所示，在本實施形態中，係使樹脂發泡素材17呈箱型之展開形狀。由該狀態，如圖5(b)所示，彎折各側板部7a、7b作成箱形狀。此時，相鄰接之側板部7a、7b以互相接觸之方式，藉由膠帶19接合，且封閉角部。即，阻塞側板部7a、7b之邊界之間隙。藉此，可防止由側板部7a、7b之漏光。 As shown in Fig. 5 (a), in the present embodiment, the resin foamed material 17 has a box-shaped expanded shape. In this state, as shown in FIG. 5(b), each of the side plate portions 7a and 7b is bent into a box shape. At this time, the adjacent side plate portions 7a, 7b are joined to each other by the tape 19 so as to be in contact with each other, and the corner portion is closed. That is, the gap between the boundaries of the side plate portions 7a, 7b is blocked. Thereby, light leakage by the side plate portions 7a, 7b can be prevented.
又，亦可在阻塞側板部7a、7b之間隙之狀態下藉由接著劑接合側板部7a、7b，取代膠帶19。 Further, instead of the gap 19, the side plate portions 7a and 7b may be joined by the adhesive in a state where the gap between the side plate portions 7a and 7b is blocked.
又，雖然省略圖示，但是在反射框架5之內面藉由珠粒23形成凸部。 Further, although not shown, a convex portion is formed by the beads 23 on the inner surface of the reflection frame 5.
如此形成之反射框架5a可得到與反射框架5同樣 之效果。又，作成箱形狀時，不需要預備加熱，且亦不需成形模具。 The reflection frame 5a thus formed can be obtained in the same manner as the reflection frame 5 The effect. Moreover, in the case of a box shape, no preliminary heating is required, and it is not necessary to form a mold.
(實施形態3) (Embodiment 3)
又，如圖6(a)所示，亦可使用在構成呈展開形狀之側板部之部位的一部份上，設置舌片21之樹脂發泡素材17a。樹脂發泡素材17a之對應於側板部7b之部份的兩端部延伸而形成。 Further, as shown in Fig. 6 (a), the resin foamed material 17a of the tongue piece 21 may be provided on a portion of the portion constituting the side plate portion having the developed shape. The resin foamed material 17a is formed to extend at both end portions of a portion corresponding to the side plate portion 7b.
如圖6(b)所示，將樹脂發泡素材17a彎折成箱形狀，將舌片21折入重疊於鄰接之側板部7a側，藉此可阻塞側板部7a、7b間之間隙。舌片21亦可藉由接著劑等接合在側板部7a之外面。又，雖然在樹脂發泡素材17a中，延伸側板部7b之兩端部而設置舌片21，但是舌片21之形成位置不限於此，且如果可在將樹脂發泡素材17a作成箱形狀時重疊於鄰接之側板部而阻塞側板部間，亦可形成在任一位置。 As shown in Fig. 6(b), the resin foamed material 17a is bent into a box shape, and the tongue piece 21 is folded over to the side of the adjacent side plate portion 7a, whereby the gap between the side plate portions 7a, 7b can be blocked. The tongue piece 21 may be joined to the outer surface of the side plate portion 7a by an adhesive or the like. Further, in the resin foamed material 17a, the tongue piece 21 is provided at both end portions of the side plate portion 7b, but the position at which the tongue piece 21 is formed is not limited thereto, and if the resin foamed material 17a can be formed into a box shape, It may be formed at any position by overlapping the adjacent side plate portions and blocking the side plate portions.
如此形成之反射框架5b可得到與反射框架5a同樣之效果。又，阻塞間隙之構件係與構成反射框架5a之材質相同，因此即使在邊界部亦可確實地反射光。 The reflection frame 5b thus formed can obtain the same effect as the reflection frame 5a. Further, since the member for blocking the gap is the same as the material constituting the reflection frame 5a, light can be surely reflected even at the boundary portion.
(實施形態4) (Embodiment 4)
又，亦可藉由壓凸加工或具有凹部之模具，如圖7所示，使用形成多數凸部31之樹脂發泡素材17b，作成圖8所示之反射框架5c。該樹脂發泡素材17b係只在組裝成箱形狀時之內側的底面7t，即，將導光板13收納在反射框架5c中時，與導光板13之背面對向之底面7t上形成凸部31。 Further, as shown in Fig. 7, the embossing or the mold having the concave portion can be used to form the reflection frame 5c shown in Fig. 8 by using the resin foamed material 17b which forms the plurality of convex portions 31. The resin foamed material 17b is formed on the bottom surface 7t on the inner side when the box shape is assembled, that is, when the light guide plate 13 is housed in the reflection frame 5c, the convex portion 31 is formed on the bottom surface 7t opposite to the back surface of the light guide plate 13. .
圖8(a)係使用由前述樹脂發泡素材17b形成之反射框架5c製作之背光單元1a。此時，如圖8(b)所示，藉由設於反射框架5c之凸部31，在導光板13與反射框架5c之間，維持預定之間隙。因此，可與珠粒23同樣地得到防止白點等之效果。 Fig. 8(a) shows a backlight unit 1a made of a reflective frame 5c formed of the above-described resin foamed material 17b. At this time, as shown in FIG. 8(b), a predetermined gap is maintained between the light guide plate 13 and the reflection frame 5c by the convex portion 31 provided in the reflection frame 5c. Therefore, the effect of preventing white spots or the like can be obtained in the same manner as the beads 23.
又，雖然樹脂發泡素材17b係藉由與圖5(a)所示之樹脂發泡素材17同樣之形狀構成，但是亦可如圖6(a)顯示之樹脂發泡素材17a所示，形成舌片21。又，亦可由1片樹脂發泡素材藉由配合模製方式等之成形，形成箱形狀之反射框架5c。此時，藉由在用於成形時之模具表面上，形成多數凹部，可容易地形成凸部31。 In addition, the resin foamed material 17b is formed in the same shape as the resin foamed material 17 shown in Fig. 5(a), but may be formed as shown in the resin foamed material 17a shown in Fig. 6(a). Tongue 21. Further, a box-shaped reflective frame 5c may be formed by molding a single resin foam material by a molding method or the like. At this time, the convex portion 31 can be easily formed by forming a plurality of concave portions on the surface of the mold for forming.
以上，雖然一面參照添附圖式，一面說明本發明之實施形態，但是本發明之技術範圍不受前述實施形態左右。可明白的是如果是所屬技術領域中具有通常知識者，在申請專利範圍中記載之技術思想之範疇內可想到各種變化例或修正例，且可了解的是該等變化例或修正例當然屬於本發明之技術範圍。 The embodiments of the present invention have been described above with reference to the accompanying drawings, but the technical scope of the present invention is not limited to the above embodiments. It is to be understood that various modifications and alterations are conceivable within the scope of the technical concept described in the claims, and it will be understood that such variations or modifications are of course The technical scope of the present invention.
1‧‧‧背光單元 1‧‧‧Backlight unit
3‧‧‧背面底盤 3‧‧‧Back chassis
5‧‧‧反射框架 5‧‧‧Reflection frame
7a,7b‧‧‧側板部 7a, 7b‧‧‧ side panel
9‧‧‧孔 9‧‧‧ hole
11‧‧‧光源 11‧‧‧Light source
13‧‧‧導光板 13‧‧‧Light guide plate
15‧‧‧光學薄膜 15‧‧‧Optical film
Claims (7)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013120812A JP2014238968A (en) | 2013-06-07 | 2013-06-07 | Reflection frame and backlight unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW201502666A true TW201502666A (en) | 2015-01-16 |
Family
ID=52007920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW103113703A TW201502666A (en) | 2013-06-07 | 2014-04-15 | Reflecting frame and backlight unit |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2014238968A (en) |
| TW (1) | TW201502666A (en) |
| WO (1) | WO2014196266A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456561A (en) * | 2019-07-29 | 2019-11-15 | 武汉华星光电技术有限公司 | Backlight module and display module |
| CN113835264A (en) * | 2021-09-14 | 2021-12-24 | 永州市福源光学技术有限公司 | Curved surface backlight module and preparation method thereof |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6067791B2 (en) * | 2015-06-30 | 2017-01-25 | 古河電気工業株式会社 | Indirect lighting device, light extraction method from indirect lighting device |
| JP5989861B1 (en) * | 2015-06-30 | 2016-09-07 | 古河電気工業株式会社 | Pattern for LED lighting frame, LED lighting device, and method for assembling LED lighting device |
| JP6200458B2 (en) * | 2015-06-30 | 2017-09-20 | 古河電気工業株式会社 | LED lighting device |
| CN105090817A (en) * | 2015-07-03 | 2015-11-25 | 深圳市华星光电技术有限公司 | Liquid crystal display and backlight module thereof |
| CN105093637B (en) * | 2015-09-22 | 2017-03-15 | 深圳市华星光电技术有限公司 | A kind of for liquid crystal display in front frame and its forming method |
| JP6664203B2 (en) * | 2015-12-04 | 2020-03-13 | 三菱電機株式会社 | Backlight and display device |
| KR101919599B1 (en) * | 2016-11-15 | 2018-11-19 | 희성전자 주식회사 | Backlight unit for display device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100931675B1 (en) * | 2003-07-02 | 2009-12-16 | 삼성전자주식회사 | Backlight Assembly with Diffuse Reflective Film |
| KR20050107034A (en) * | 2004-05-07 | 2005-11-11 | 삼성전자주식회사 | A liquid crystal display provided with a backlight assembly having an improved structure |
| JP2006308690A (en) * | 2005-04-26 | 2006-11-09 | Skg:Kk | Liquid crystal display device and illuminator |
| JP4413186B2 (en) * | 2005-12-28 | 2010-02-10 | 三菱電機株式会社 | Planar light source device and display device using the same |
| JP2007199363A (en) * | 2006-01-26 | 2007-08-09 | Furukawa Electric Co Ltd:The | Light reflection member and straight down type surface light emitting device using same |
| JPWO2010095305A1 (en) * | 2009-02-23 | 2012-08-16 | シャープ株式会社 | Lighting device, surface light source device, and liquid crystal display device |
| JP5549178B2 (en) * | 2009-10-23 | 2014-07-16 | 三菱電機株式会社 | Planar light source device and liquid crystal display device using the same |
| US8944641B2 (en) * | 2009-12-18 | 2015-02-03 | Sharp Kabushiki Kaisha | Lighting device, display device and television receiver |
| WO2012043396A1 (en) * | 2010-09-27 | 2012-04-05 | 古河電気工業株式会社 | Backlight panel and reflection plate for backlight panel |
-
2013
- 2013-06-07 JP JP2013120812A patent/JP2014238968A/en active Pending
-
2014
- 2014-04-09 WO PCT/JP2014/060278 patent/WO2014196266A1/en active Application Filing
- 2014-04-15 TW TW103113703A patent/TW201502666A/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456561A (en) * | 2019-07-29 | 2019-11-15 | 武汉华星光电技术有限公司 | Backlight module and display module |
| US11307349B2 (en) | 2019-07-29 | 2022-04-19 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Backlight module and display module |
| CN113835264A (en) * | 2021-09-14 | 2021-12-24 | 永州市福源光学技术有限公司 | Curved surface backlight module and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014238968A (en) | 2014-12-18 |
| WO2014196266A1 (en) | 2014-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TW201502666A (en) | Reflecting frame and backlight unit | |
| TWI669545B (en) | Display device and backlight module thereof | |
| TWI431346B (en) | Light guide module, backlight module and fabricating method for the light guide module | |
| KR0152279B1 (en) | Edge light panel and its production | |
| JP5009491B2 (en) | Prism-integrated light diffusing plate for LCD backlight device | |
| KR20090073677A (en) | Optical plate, the method manufacturing it and liquid crystal display | |
| TW201213973A (en) | Diffusion bar with spacer collar ring | |
| JP2010281850A (en) | Light reflecting/diffusing apparatus and apparatus and method for manufacturing the same | |
| KR20110114641A (en) | Illuminating device, surface light source, and liquid crystal display device | |
| TWI616671B (en) | Optical sheet and backlight unit for backlight unit | |
| US9075180B2 (en) | Light guide plate and manufacturing method thereof and backlight module using same | |
| TWI401504B (en) | Backlight module | |
| WO2020237715A1 (en) | Backlight module and liquid crystal module | |
| CN106104369A (en) | Display device | |
| WO2017068845A1 (en) | Light-emission device, display device, and illumination device | |
| JP5332469B2 (en) | Optical component, backlight unit and display device | |
| JP2013097954A (en) | Light guide plate and its manufacturing method | |
| JP2017188398A (en) | Planar lighting device | |
| JP6708593B2 (en) | Display device | |
| JP2016021064A (en) | Optical film and display device using the optical film | |
| JP5304081B2 (en) | Optical plate and backlight unit and display device using the same | |
| KR20090073679A (en) | Optical sheet and display | |
| US20110188262A1 (en) | Light conductive plate and manufacturing method thereof | |
| CN210123511U (en) | Optical diaphragm group and backlight module | |
| KR101210412B1 (en) | One-body light guide panel and fabricating method thereof |