201128245 六、發明說明： 【發明所屬之技術領域】 本發明涉及一種可應用於背光模組做為導光用途的導光板， 特別是一種直接在導光板形成具備光線擴散層的製造方法，以及 由該製造方法所製成之導光板。 【先前技術】 一般用於液晶顯示器（LCD)的背光模組包含有一導光板，導光 板的第一侧面設置一反射片，相對的第二側面則設置由擴散片與 棱鏡片等所組成的複數光學膜片，再於該些元件的周邊以一外框 包圍，導光板的側邊則設置光源（通稱側光式），光源所發出的光 線由導光板的側邊投射進入，部分光線由反射片反射，再依序通 過擴散片與稜鏡片射出；擴散片的功能，在於使透過的光線均勻 擴散，增加發光角度。 習知側光式顯示器的背光模組進行組裝時，係由下而上依序 為反射片、導光板、擴散片，以及稜鏡片，由於糾較多，故製 造後的厚度較大，無法進一步降低生產成本。 【發明内容】 本發明的目的’在於解決習知背光模組，由於元件數量較多， 以致於組裝程序隨之較多，無法進一步降低製造成本的問題。 本發明的特徵，係提供—鑛擴散層—體結合於導光板的製 201128245 造方法，使導光板本身即频擴散絲的功能，*需雜裝擴散 片’從而減少背光模組的組裝工序，降低生產成本。 基於此，本發明提供的導光板製造方法，其技術手段包括： 提供-導光板體材料；提供具有不同於料光板體材料之光 折射率的擴散粒子；將—部分所述導紐體材料在軟化狀態下與 所述擴散粒子混合形姐合物質；將軟化狀態的所述混合物質與 軟化狀細另-部分導絲體材料經由—模頭導出，並通過複數 滾壓輪輾壓而形成具有—擴散層的導光板，且該混合物質結合於 導光板體一表面形成擴散層。 本發明在導光板體的出光面設置擴散層，相對於出光面的背. 面可以設置用來增加光折射與反射效果的複數導光微結構；其技 術手段可以在賴輪絲設置複數__，使導祕體材料與 混合物質通過該滾壓輪時，利用模塑結構在導光板體材料表面成 型出導光微結構。 一種選擇，所述設於滚壓輪表面的模塑結構，可以是高於滾 壓輪表面的突出結構’該突出結構可以是任何一種幾何形狀或不 規則形狀，藉由突出結構壓入軟化的導光板材料，使導光板材料 表面形成凹孔狀的導光微結構。 另一種選擇，所述設於滾壓輪表面的模塑結構，可以是低於 滚壓輪表面的凹入結構，該凹入結構可以是任何一種幾何形狀或 不規則形狀，藉由軟化的導光板材料被壓入該凹入結構後，使導 光板材料表面形成凸部的導光微結構。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light guide plate that can be applied to a backlight module as a light guide, and particularly to a method for directly forming a light diffusion layer on a light guide plate, and The light guide plate produced by the manufacturing method. [Prior Art] A backlight module generally used for a liquid crystal display (LCD) includes a light guide plate. The first side of the light guide plate is provided with a reflection sheet, and the opposite second side surface is provided with a plurality of diffusion sheets and prism sheets. The optical film is surrounded by a frame at the periphery of the components, and a light source (generally called a side light type) is disposed on a side of the light guide plate, and light emitted by the light source is projected from the side of the light guide plate, and part of the light is reflected. The sheet is reflected and then sequentially ejected through the diffusion sheet and the cymbal sheet; the function of the diffusion sheet is to uniformly diffuse the transmitted light and increase the illuminating angle. When the backlight module of the conventional side-lit display is assembled, it is a reflection sheet, a light guide plate, a diffusion sheet, and a cymbal sheet from bottom to top. Since the correction is large, the thickness after manufacture is large, and further cannot be further reduce manufacturing cost. SUMMARY OF THE INVENTION The object of the present invention is to solve the conventional backlight module, which has a large number of components, so that there are many assembly procedures, and the problem of manufacturing cost cannot be further reduced. The invention provides a method for manufacturing a mineral-diffusion layer-body bonded to a light guide plate according to the method of manufacturing the light guide plate, so that the light guide plate itself functions as a frequency-diffusion wire, and the multi-purpose diffusion sheet is required to reduce the assembly process of the backlight module. reduce manufacturing cost. Based on this, the method for manufacturing a light guide plate provided by the present invention includes: providing a light guide plate material; providing a diffusion particle having a refractive index different from that of the material of the light guide plate; and partially-forming the guide material Mixing the substance with the diffusing particles in a softened state; and extracting the mixed substance and the softened fine-partial guide wire material in a softened state through a die, and forming by having a plurality of rolling rollers a light guide plate of the diffusion layer, and the mixture is bonded to a surface of the light guide plate to form a diffusion layer. The invention provides a diffusion layer on the light-emitting surface of the light guide plate body, and a plurality of light-guide microstructures for increasing the light refraction and reflection effect can be provided on the back surface of the light-emitting surface; the technical means can set the plural number in the ray wheel __ When the guiding body material and the mixed substance pass through the rolling wheel, the light guiding microstructure is formed on the surface of the light guiding plate body material by the molding structure. Alternatively, the molding structure provided on the surface of the rolling wheel may be a protruding structure higher than the surface of the rolling wheel. The protruding structure may be any geometric shape or irregular shape, and is softened by pressing the protruding structure. The material of the light guide plate is such that the surface of the light guide plate material forms a light guiding microstructure with a concave hole shape. Alternatively, the molding structure provided on the surface of the rolling wheel may be a concave structure lower than the surface of the rolling wheel, and the concave structure may be any geometric shape or irregular shape by softening guide. After the light plate material is pressed into the concave structure, the light guide plate material surface forms a light guiding microstructure of the convex portion.
4 S 201128245 本發明係將擴散層一體結合地設於導光板的出光面而構成一 導光板。 本發明之導光板包含有一導光板體與一擴散層，該導光板體 具有至少一表面；所述擴散層一體結合於該導光板體的該表面， 該擴散層具有不同於該導光板體的折射率。 本發明用於一體結合於導光板體的擴散層具有一基材，該基 材是相同於導光板體的材料，該基材中包含有複數不同於該導光 板體材料之光折射率的擴散粒子。 本發明之導光板體用於結合擴散層的表面，為導光板體的出 光面。 本發明在導光板體相對於結合擴散層之該表面的一背面設有 導光微結構。 本發明設於導光板體的導光微結構為複數低於所述背面的凹 孔’或複數高於所述背面的凸部。 和習知導光板相較’本發明藉由將擴散層直接一體結合於導 光板’使得導光板本身具備擴散光線的效果，因此，在組裝背光 模組時’不需要再組裝擴散片，可以減少元件組裝工序，降低生 產成本，以及避免擴散片與導光板剥離的可能性，降低背光模組 的不良或故障機率。 【實施方式】 以下配合圖式及元件符號對本發明的實施方式做更詳細的說 201128245 l 明’俾使熟習該項技藝者在研讀本說明書後能據以實施。 第-圖為顯示本發明導光板結構及光線折射表現之實施例平 面剖視m圖中顯示本發明的導光板i包含有一導歧體u與一 擴散層12，導光板體11具有至少一表面，例如位於側邊的入光面 11卜與-位於導光板11 -側面的出光面112，相對於出光面⑴ 的-面為背面113 ;入光面U1設置至少一光源2 ;背面ιΐ3可設 置複數導光微結構114 ;擴散層12係一體結合地設於導光板體^ 的出光面112 ;光源2將光線投射進人導光板體u傳導後，部分 光線直接通過出光面112與擴散層12射出，部分光線則由導光微 結構114反射與折射再通過出光面丨12與擴散層12射出。 其中，所述擴散層12是一種利用相同於導光板體u的材料 做為基材，在該基材中摻入具有不同於該導光板體11之材料之光 折射率的擴散粒子121所形成的混合物質。 前述的導光微結構114可以是複數低於所述背面ι13的凹 孔’也可以是複數高於所述背面113的凸部。4 S 201128245 In the present invention, a diffusion layer is integrally provided on the light-emitting surface of the light guide plate to form a light guide plate. The light guide plate of the present invention comprises a light guide plate body and a diffusion layer, the light guide plate body has at least one surface; the diffusion layer is integrally coupled to the surface of the light guide plate body, and the diffusion layer has a different from the light guide plate body. Refractive index. The diffusion layer for integrally bonding to the light guide plate body has a substrate which is the same material as the light guide plate body, and the substrate includes a plurality of diffusions different from the refractive index of the light guide plate body material. particle. The light guide plate body of the present invention is used for bonding the surface of the diffusion layer and is a light-emitting surface of the light guide plate body. In the present invention, a light guiding microstructure is provided on a back surface of the light guiding plate body with respect to the surface to which the diffusion layer is bonded. In the present invention, the light guiding microstructure of the light guiding plate body is a plurality of concave holes or lower portions than the back surface. Compared with the conventional light guide plate, the present invention has the effect of diffusing light by directly integrating the diffusion layer into the light guide plate. Therefore, when assembling the backlight module, it is not necessary to assemble the diffusion sheet, which can be reduced. The component assembly process reduces the production cost and avoids the possibility of peeling off the diffusion sheet and the light guide plate, and reduces the probability of failure or failure of the backlight module. [Embodiment] Hereinafter, the embodiments of the present invention will be described in more detail with reference to the drawings and the reference numerals. The invention can be implemented by those skilled in the art after studying this specification. Figure 1 is a cross-sectional view showing the structure of the light guide plate and the light refraction of the present invention. The light guide plate i of the present invention comprises a guide body u and a diffusion layer 12, and the light guide plate body 11 has at least one surface. For example, the light-incident surface 11 on the side and the light-emitting surface 112 on the side of the light-guide plate 11 are opposite to the surface 113 of the light-emitting surface (1); at least one light source 2 is disposed on the light-incident surface U1; The plurality of light guiding microstructures 114; the diffusion layer 12 is integrally disposed on the light emitting surface 112 of the light guiding plate body ^; the light source 2 projects the light into the human light guiding plate body u, and some of the light directly passes through the light emitting surface 112 and the diffusion layer 12 Upon exiting, part of the light is reflected and refracted by the light guiding microstructures 114 and then emitted through the light exiting surface 12 and the diffusion layer 12. The diffusion layer 12 is formed by using a material similar to the light guide plate body u as a substrate, and a diffusion particle 121 having a refractive index different from that of the material of the light guide plate body 11 is incorporated in the substrate. The quality of the mixture. The aforementioned light guiding microstructures 114 may be a plurality of recesses lower than the back surface 135, or may be a plurality of convex portions higher than the back surface 113.
第二圖與第三圖係顯示本發明製造導光板的製造設備與方法 的不意圖；圖中顯示本發明可以提供一種包含有模頭31的製造設 備3’模頭31連接一内部設有第一加熱螺桿34的管道與一内部設 有第二加熱螺桿35的管道’第一加熱螺桿34再連接一導光板體 材料桶32與一混合物質桶33;模頭31是一種具有内空間的容器， 其内空間具有區隔的空間與輸送機構(該輸送機構屬於習知技 二’故不予顯示）’可將軟化的導光板體材料11A或混合物質12A 201128245 輸送通過其下方的出口流出。導光板體材料桶32係用來盛裝製造 導光板體的原料粒子；混合物質桶33係用來盛裝在導光板體材料 中摻入適當比例之前述擴散粒子混合而成的混合物質12A。導光板 體材料11A的原料粒子在管道中被第一加熱螺桿34輸送至模具31 的過程中被適當地加熱而成軟化狀態。導光板體材料之原料粒子 與擴散粒子在管道巾被第二加解桿35輸送域具31的過程中 亦被適當地加熱而成軟化狀態的混合物質12A。模頭31的出口下 方設置滾壓輪組36 ’其可以包含第一滾壓輪36卜第二滾壓輪3兕 與第二滚壓輪363’甚至可以依實際需求設置更多滾壓輪；以及設 置輸送滾輪娜’與包含上托拉輪難與下托拉輪_的托拉輪 組364。軟化狀態的導光板體材料丨1A與混合物質12A同時從模頭 31的出口被輸送而下，進入第一滾壓輪361與第二滾壓輪3肋之 間，由第-滾壓輪361與第二滾塵輪362將導光板體材料UA與 混合物質12A初步輾壓結合在一起’再通過第二滾壓輪362與第 二滾壓輪363之間進-步製作前述的導光微結構丨丨4，同時讓導光 板體材料11A與混合物質l2A進—步結合更緊密形成導光板i，所 述混合物質12A即形成導光板體U上之擴散層丨以遗後再通過輸 送滾輪365，以及上托拉輪364Α與下托拉輪364β之間，由上、下 托拉輪接觸導光板1產生的摩擦力將導光板丨拉動輸送，最後再 依實際需要的尺寸將其裁切成適當面積。 第四圖為顯不本發明在導光板體相對於擴散層另—面的背面 形成導光微結構的實施方式，可以在第三滾壓輪咖的表面設置 201128245 複健歧構3_賴顏構；如第四A _示，當軟化狀態 且的$光板體材料11A與混合物質以被輸送通過第二滾屢 輪362、與第三滾壓輪363之間時，導光板體材料m與混合物質 12A將叉到勤而結合為—體，同時利用突出結構蘭 壓入軟化 /導光板體材料11A’等到突出結構卿離開導歧體材料⑴ y4、P成3L出低於‘光板體背面的凹孔1142，以做為導光微結構； 所述凹孔可以是任何一種適當的幾何形狀或非幾何形狀。 ，第五圖為顯示本發明在導祕體相對於擴散層另—面的背面 形成導光微結構的實施方式，可以在第三滾壓輪363的表面設置 複數凹入結構3632做為模麵構；如第五a圖所示，當軟化狀態 且重疊的導光板體材料11A與混合物質m被輸送通過第二賴 輪362與第二滾壓輪363之間時，導光板體材料⑽與混合物質 似將受到壓力而結合為—體，同時使得導光板體材料 11A因為受 到壓力而被壓入凹入結構3632，等到凹入結構卿脫離導光板體 材枓m後即成型出高於導光板體背面的凸部⑽，以做為導光 微結構；所述凸部可以是任何一種適當的幾何形狀或非幾何形狀。 以上所述者僅為用以解釋本發明之較佳實施例，並非企圖且 以對本發明做任何形式上之限制，是以，凡有在相同之發明精神 下所作有關本_之任何修飾或變更，㈣應 保«L 个知I圖 8 s 201128245 【圖式簡單說明】 第一圖為顯示本發明導光板結構及光線折射表現之第一實施例平 面刹視圖。 第二圖為顯示本發明製造具有擴散效果之導光板的設備與方法之 實施例不意圖。 第三圖為第二圖之A區域的局部放大圖。 第四圖為顯示本發明在其巾—滾壓輪表面設置賴塑結構為複數 突出結構之實施例示意圖。 第四A圖為顯示本發明细模塑結構為突出結構之滾壓輪在混合 物質表面形成複數凹孔之導光微結構的實施例示意圖。 第五圖為顯示本發明在其巾―賴輪表面設置賴龍構為複數 凹入結構之實施例示意圖。 第五A圖為顯示本發明_模_構為凹人結構之滾壓輪在混合 物質表面形錢數凸部之導光微結構的實施例示意圖。 【主要元件符號說明】 1……導光板 π......導光板體 ha......導光板體材料 111 ......入光面 112 ......出光面 113 ......背面 114……導光微結構 201128245 1141· ••…凸部 1142. ••…凹孔 12···· ••擴散層 12A”. …混合物質 121... …擴散粒子 2…… 光源 3…… ’製造設備 31···· ••模頭 32···· • · ^光板體材料桶 33···· ••混合物質桶 34···· ••第一加熱螺桿 35···· • •第二加熱螺桿 36…. ••滾壓輪組 361“ •…第一滾壓輪 362" …·第二滾壓輪 363- •…第三滾壓輪 3631. …··突出結構 3632. ••…凹入結構 364" •…托拉輪組 364A* .....上托拉輪 364B· ••…下托拉輪 365.. …·輸送滾輪2 and 3 are schematic views showing the manufacturing apparatus and method for manufacturing a light guide plate according to the present invention; the figure shows that the present invention can provide a manufacturing apparatus 3' including a die 31. A pipe of a heating screw 34 and a pipe 1A having a second heating screw 35 are further connected to a light guide plate material barrel 32 and a mixture barrel 33; the die 31 is a container having an inner space. The inner space has a space and a conveying mechanism (the conveying mechanism belongs to the prior art), and the softened light guide plate material 11A or the mixed material 12A 201128245 can be conveyed through the outlet below it. The light guide plate material material barrel 32 is used to hold the raw material particles for manufacturing the light guide plate body; the mixed material barrel 33 is for containing the mixed substance 12A in which a suitable ratio of the above-mentioned diffusion particles is mixed in the light guide plate body material. The raw material particles of the light guide plate body material 11A are appropriately heated to be softened in the process of being conveyed by the first heating screw 34 to the mold 31 in the duct. The raw material particles and the diffusing particles of the light guide plate body material are also appropriately heated to form a mixed substance 12A in a softened state in the process in which the pipe towel is transported to the field member 31 by the second strainer 35. A rolling wheel set 36' is disposed below the outlet of the die 31. It may include a first rolling wheel 36, a second rolling wheel 3兕 and a second rolling wheel 363', and even more rolling wheels may be provided according to actual needs; And a set of transport rollers Na' and a tow wheel set 364 including a top puller and a lower puller_. The light-guide plate material 丨1A and the mixed substance 12A in a softened state are simultaneously conveyed from the outlet of the die 31, and enter between the first rolling wheel 361 and the second rolling wheel 3 rib, and the first rolling roller 361 And the second dust wheel 362 combines the light guide plate body material UA with the mixed material 12A, and the second light guide wheel 362 and the second rolling wheel 363 are further advanced to form the aforementioned light guide micro The structure 丨丨4, at the same time, the light guide plate material 11A and the mixed substance l2A are further combined to form the light guide plate i, and the mixed substance 12A forms the diffusion layer on the light guide plate U to pass through the transport roller. 365, and between the upper roller 364 Α and the lower roller 364β, the friction between the upper and lower roller contacts the light guide plate 1 to pull the light guide plate 输送, and finally cut according to the actual size required. Into the appropriate area. The fourth figure shows an embodiment in which the light guiding plate body is formed on the back surface of the light guiding plate body opposite to the other side of the diffusion layer, and the surface of the third rolling wheel can be set to 201128245. As shown in FIG. 4A, when the soft plate state 11A and the mixture are transported between the second rolling wheel 362 and the third rolling wheel 363, the light guide plate material m and The mixed substance 12A is bonded to the body and joined to the body, and at the same time, the protruding structure is pressed into the softening/light guide plate material 11A' until the protruding structure leaves the guide material (1) y4, P becomes 3L lower than the 'light plate back The recessed hole 1142 is used as a light guiding microstructure; the recessed hole may be any suitable geometric or non-geometric shape. The fifth figure shows an embodiment in which the light guiding microstructure is formed on the back surface of the guiding body relative to the other surface of the diffusion layer, and a plurality of concave structures 3632 can be disposed on the surface of the third rolling wheel 363 as a molding surface. As shown in FIG. 5A, when the softened state and the overlapping light guide plate material 11A and the mixed substance m are transported between the second range 362 and the second rolling wheel 363, the light guide plate body material (10) is The mixed material seems to be subjected to pressure and combined into a body, and at the same time, the light guide plate body material 11A is pressed into the concave structure 3632 due to the pressure, and waits until the concave structure is separated from the light guide plate body 枓m to form a higher guide. The convex portion (10) on the back side of the light plate body serves as a light guiding microstructure; the convex portion may be any suitable geometric shape or non-geometric shape. The above is only a preferred embodiment for explaining the present invention, and is not intended to be any limitation of the present invention, and any modifications or alterations to the present invention may be made in the spirit of the same invention. (4) should be protected «L know I Figure 8 s 201128245 [Simple description of the drawings] The first figure is a plan view showing the first embodiment of the light guide plate structure and light refraction performance of the present invention. The second figure is intended to show an embodiment of the apparatus and method for manufacturing a light guide plate having a diffusion effect of the present invention. The third figure is a partial enlarged view of the A area of the second figure. The fourth figure is a schematic view showing an embodiment in which the present invention is provided with a plurality of protruding structures on the surface of the towel-rolling wheel. Fig. 4A is a view showing an embodiment of a light guiding microstructure in which a plurality of concave holes are formed on the surface of the mixed material by the rolling wheel of the present invention. Fig. 5 is a view showing an embodiment of the present invention in which a Lailong structure is provided as a plural concave structure on the surface of the towel-receiving wheel. Fig. 5A is a view showing an embodiment of the light guiding microstructure of the rolling wheel of the present invention in the shape of the surface of the mixed material. [Description of main component symbols] 1... Light guide plate π... Light guide plate body ha... Light guide plate body material 111 ... Light entrance surface 112 ... Light output Face 113 ... back 114 ... light guide microstructure 201128245 1141 · ••... convex 1142. ••...recessed hole 12····••diffusion layer 12A”....mixture 121... ...diffusion particles 2... Light source 3... 'Manufacturing equipment 31····••Mold 32······ ^ Light plate material barrel 33····••Mixed barrel 34···· • First heating screw 35···· • Second heating screw 36....••Rolling wheel set 361“•...first rolling wheel 362" ...·second rolling wheel 363- •...third rolling Pressure roller 3631. ...·· protruding structure 3632. ••...recessed structure 364" •...tora wheel set 364A* .....upper puller 364B· ••...lower puller 365.....· Transport roller