1276895 •九、發明說明： 【發明所屬之技術領域】 匕本^涉及背統構，尤其涉及可雙面發光之縣做，肢應用於 該为光棋組之導光板及該導光板之製造方法。 【先前技術】 在般液曰曰』示ϋ中’需使用背光模組作為光源，而背光模組依據構 造之不同，通常可分為側光式及直下式兩大類。 側光式背光·通常僅採料支辟或兩支燈管作為絲，利用導光 板設計來加強對光線行進方向之控制，然而由於光線行進方向控制不易， 籲因此顯示效果通常較差。相比而言，直下式背光模組之設計係將作為光源 之燈管置於背光模組正下方，因安置空間變大，故可使用兩支以上之燈管 來增加光源強度，因而較適用於對可移植性與空間要求較不挑剔之一般液 晶顯不器。 如，一圖所示，一種先前技術之直下式背光模組1包括一反射板14、 多個燈管13、一導光板1〇、一稜鏡片u及一擴散片12。其中反射板14位 於直下式背光模組1之最底部，用以將燈管13所發出之光線反射向導光板 10。燈官13為直下式背光模組之光源。導光板1〇設置於反射板14上。稜 鏡片11設置於導光板10上，擴散片12設置於稜鏡片u上。導光板1〇與 擴散片12作用在於將光線散射，以調整光線之均勻度，稜鏡片n之作用 • 在於聚光，以增加背光模組1之輝度。 背光模組1在與燈管13相對應之區域會比背光模組1之其他區域較 亮，容易導致背光模組1之出光不均勻。 另，由於液晶面板僅位於背光模組1之相對於擴散片12之一面，因此， 燈管13朝向另一面所散射之光線，僅能由反射板14反射回來，方能達到 顯示用光線之功能，如此背光模組1不但在光線反射時消耗了光線利用率， 且只能提供單面顯示功能，並未充分利用光線。 【發明内容】 有鑑於此，有必要提供一種發光均勻度高且可以有效提高光源利用率 之背光模組、導光板及導光板製造方法。 1276895 -種背光模組，包括若侦管及相對設置之兩導光板，該兩導光板分 別包括1光面及-與該人光面減之出光面，該若干燈管餅上述兩導 光板入光面之間，上述兩導光板之入光面正對燈管之區域分別間隔設置有 若干第-突起組；相鄰第-突起組之間設有—第二突起；上述出光面正對 弟一突起之區域為凹面。 所述之出光面為霧面。 -種導光板，包括-人光面及—與該入光面相對之出光面，上述入光 面間隔設置有轩第-突起組；相鄰第-突起組之間設有-第二突起；上 述出光面正對第一突起之區域為凹面。1276895 • Nine, invention description: [Technical field of invention] 匕本^ relates to the back structure, especially to a county capable of double-sided illumination, the limb is applied to the light guide plate of the optical chess set and the manufacturing method of the light guide plate . [Prior Art] In the case of the liquid 曰曰 曰曰 ’ ’ ’ 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光Sidelight type backlights. Usually only the material is used as the wire or the two tubes are used as the wire. The light guide plate design is used to enhance the control of the direction of light travel. However, because the direction of light travel is not easy to control, the display effect is usually poor. In contrast, the design of the direct-lit backlight module is to place the lamp as a light source directly under the backlight module. Since the installation space becomes larger, more than two lamps can be used to increase the intensity of the light source, so that it is more suitable. A general LCD display that is less critical to portability and space requirements. As shown in the figure, a prior art direct type backlight module 1 includes a reflector 14 , a plurality of tubes 13 , a light guide 1 , a cymbal u and a diffusion sheet 12 . The reflector 14 is located at the bottom of the direct-type backlight module 1 for reflecting the light emitted by the lamp 13 to the light guide plate 10. The lamp officer 13 is a light source of the direct type backlight module. The light guide plate 1 is disposed on the reflection plate 14. The prism lens 11 is disposed on the light guide plate 10, and the diffusion sheet 12 is disposed on the cymbal u. The light guide plate 1 〇 and the diffusion sheet 12 act to scatter light to adjust the uniformity of the light, and the role of the cymbal n is to condense light to increase the brightness of the backlight module 1. The area of the backlight module 1 corresponding to the lamp tube 13 is brighter than other areas of the backlight module 1, which tends to cause uneven illumination of the backlight module 1. In addition, since the liquid crystal panel is only located on one side of the backlight module 1 with respect to the diffusion sheet 12, the light scattered by the lamp tube 13 toward the other surface can only be reflected back by the reflection plate 14 to achieve the function of displaying light. Therefore, the backlight module 1 not only consumes light utilization when the light is reflected, but also provides a single-sided display function, and does not make full use of light. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a backlight module, a light guide plate, and a light guide plate manufacturing method which have high light-emitting uniformity and can effectively improve light source utilization. 1276895 - A backlight module comprising: a detecting tube and two opposite light guiding plates, wherein the two light guiding plates respectively comprise a light surface and a light emitting surface which is reduced from the light surface of the light, and the two light guiding plates of the plurality of light tube cakes Between the smooth surfaces, the light-incident surfaces of the two light guide plates are respectively disposed with a plurality of first-protrusion groups adjacent to the region of the lamp tube; and a second protrusion is disposed between adjacent first-protrusion groups; the light-emitting surface is opposite to the light-emitting surface The area of a protrusion is a concave surface. The light exiting surface is a matte surface. a light guide plate comprising: a human light surface and a light emitting surface opposite to the light incident surface, wherein the light incident surface is spaced apart from the first protrusion group; and the adjacent first protrusion group is provided with a second protrusion; The region where the light-emitting surface faces the first protrusion is a concave surface.
所述之出光面為霧面。 一種製造上述導光板之方法，包括以下步驟： 提供一母模仁與一公模仁； 於母模仁表面加工形成與導光板出光面互補之圖案； 於公板仁表面加工形成與導光板入光面互補之圖案； 將公母模仁合模，進行射出成型； 脫模，形成導光板。 上述之導光板之方法還包括町步驟：於母模仁表面經過 電極放電加工得到具有霧面效果之表面。 以ΪίΤ紐術，騎之^模組錢面式縣，使得同一背光 用、率=晶面板=用^不僅可以同時顯示晝面，還可使背光模組之 射光線之作用冋蚀^背光模組中導光板之入光面之第一突起組起到了散 盘朵满正經g、>光均勻之作用；减凹面_起，可以降低背光模組之 目'的二二A之光強度，避免該區域光強度過高，從而達到均勻出射之 更加均勻。’人光面之第二突起也用來散射來自光源之絲，使出光 之出光面之霧面可以更進一步散射光線，使f光模組 【實施方式】 下面將結合關，對本發_進—步之詳細說明。 1276895 請參閱第二圖，為本發明背光模組之實施例。該背光模組2包括兩導光 板20、若干燈管23、兩稜鏡片21、兩擴散片22及一外框25。 燈管23—般為冷陰極螢光燈，若干燈管23平行設置於背光模組2内。 兩導光板20以若干燈管23平行排列所形成之平面為對稱面對稱設置， 分別包括一入光面201及一與之相對之出光面202，以下僅對其中之一進行 說明。導光板20之入光面201包括若干間隔設置之第一突起組20H，兩相鄰 第一突起組2011之間以及導光板20之兩端與其相鄰之第一突起組2〇11之間 為一第二突起2012，其中，第二突起2012之高度大於第一突起組2〇11，且 兩導光板20之相對設置之第二突起2〇12相互合攏，以使兩導光板2〇之兩相 對之第一突起組2011之間形成一空腔，用於放置燈管23。該第一突起組20H 組及第二突起2012用以擴散燈管23所發出之光線。出光面202在與燈管23相 對之區域設置沿燈管23徑向之截面為弧形之凹面2〇21，其中，凹面2〇21之 沿燈管23徑向之截面凹弧之曲率半徑R>燈管23徑向截面之曲率半徑r。上述 第一突起組2011、第二突起2012及凹面2021皆沿燈管23之轴向方向設置。 可以理解，凹面2021還可以為其卿式，比如徑向截面為v形之凹面等。 兩稜鏡片21分別平行設置於兩導光板2〇之外侧，擴散片22則係分別平 行設置於兩稜鏡片21外側。 外框25將燈管23、導光板2〇、稜鏡片21及擴散片22包覆在一起，用於 將他們固定。 、 出 請參閱第三圖，出光面202除凹面2〇21之外之其他區域為平面。另 光面202還可以為霧面，可以起到擴散光之效果。 請參閱第四圖與第五圖，本實施例之第一突起組2〇11為複數三棱柱， 2燈管23徑向截面為複數三㈣。第二突起謂之沿燈節徑向之截面 為梯且該獅在導光板料側之_底邊相較㈣—底邊短。 λτα \併，閱第’、七及第人圖。第六圖為第一突起組2011之沿燈管23 ’該複數截面三角形之朝向導光板2(3外側之—角角度為 Θ ’角度0範圍為6〇。〜150。。险二备γ从唆扣 向之截面還可為複數之1他开二丨:外同第且2011之沿燈管23徑 Μ數之侧^ / 狀第七圖，第一突起組2011，為其中一角 <·、、 ®角-角形，或如第八圖，第-突起組2011”為複數之圓弧形 1276895 * *等。 清-併參閲第九圖與第十圖。第九圖為第二突起2〇12之沿燈管23徑向 之截面不意圖，為一梯形，其兩腰於朝向導光板2〇外侧方向所成之角度為 Φ ’角度Φ範圍為80〜175。。除梯形外，第二突起2〇12之沿燈管23徑向之 截面還可為其他形狀，如第十圖之三角形等，其中該三角_向導光板2〇 外侧方向之角度為Φ，，角度φ，範圍為8〇。〜175。。 可以理解，兩導光板2〇亦可以不完全相同，其入光面2〇1之第一突起組 2011、第二突起2〇12及出光面2〇2之凹面2〇21可在各自之參數範圍内變化。 相較於先刖技術’本實施例之背光模組2中之導光板2〇之入光面2〇1具 馨有第一突起組2011與第二突起2〇12，皆具有將光擴散之效果，使背光模組2 出光均勻。導光板2〇之出光面2〇2正對燈管之區域設置之凹面2〇21與正對燈 官23之第一突起組2011共同作用，將背光模組2正對燈管烈之區域之光擴 散’使出光更加均勻。另，出光面採用霧面設計，可以使背光模組2之出光 更加均勻。 進一步地，背光模組2可供兩個液晶面板利用，不僅可以同時顯示晝 面，還可以使背光模組2之光線利用率提高。 本發明還提供一上述導光板2〇之射出成型製造方法，其包括以下步驟： 提供一母模仁與一公模仁； 於母模仁表面加工形成與導光板之出光面202互補之圖案； • 於公模仁表面加工形成與導光板入光面201互補之圖案； 將公母模仁合模，進行射出成型； 脫模，形成導光板。 另，若出光面202為霧面時，可在母模仁表面加工形成具有與出光面 202互補之圖案後，再進行下面步驟：於母模仁表面經過電極放電加工得到 具有霧面效果之出光面。 綜上所述’本發明確已符合發明專利之要件，爰依法提出專利申請。 惟，以上所述者僅為本發明之較佳實施方式，本發明之範圍並不以上述實 财式為限，舉凡熟f本案㈣之人诚依本發狀精摘作之等效修飾 或變化，皆應涵蓋於以下申請專利範圍内。 1276895 【圖式簡單說明】 第一圖係先前技術背光模組之截面示意圖； 第二圖係本發明實施例背光模組之沿燈管徑向之截面示意圖； 第三圖係本發明實施例背光模組所採用導光板之立體圖； 第四圖係本發明實施例背光模組所採用導光板另一角度之立體圖； 第五圖係本發明實施例背光模組所採用之導光板沿燈管徑向之截面示 意圖； 第六圖係第五圖之VI部分之放大示意圖； 第七圖、第八圖係另兩種形式之第-突起組沿燈管徑向之截面之放大 不意圖；The light exiting surface is a matte surface. A method for manufacturing the above light guide plate comprises the steps of: providing a female mold core and a male mold core; forming a pattern complementary to the light exit surface of the light guide plate on the surface of the female mold core; forming a surface and forming a light guide plate on the surface of the male plate a matte complementary pattern; the male and female molds are clamped and injection molded; the mold is released to form a light guide plate. The method of the above light guide plate further comprises the step of: forming a surface having a matte effect by electrode discharge machining on the surface of the mother mold. Ϊ Τ Τ Τ , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The first protrusion group of the light-incident surface of the light guide plate in the group functions to make the disk full of positive g, > light uniform; the concave surface can reduce the light intensity of the backlight of the backlight module. Avoid the light intensity in this area is too high, so as to achieve a more uniform uniform emission. The second protrusion of the human smooth surface is also used to scatter the filament from the light source, so that the matte surface of the light exiting surface can further scatter the light, so that the f-light module [embodiment] will be combined with the following, Detailed description of the steps. 1276895 Please refer to the second figure, which is an embodiment of a backlight module of the present invention. The backlight module 2 includes two light guide plates 20, a plurality of light tubes 23, two cymbals 21, two diffusion sheets 22, and an outer frame 25. The lamp tube 23 is generally a cold cathode fluorescent lamp, and a plurality of lamps 23 are disposed in parallel in the backlight module 2. The two light guide plates 20 are symmetrically arranged with a plane formed by the parallel arrangement of the plurality of lamps 23, and respectively include a light incident surface 201 and a light exit surface 202 opposite thereto, and only one of them will be described below. The light incident surface 201 of the light guide plate 20 includes a plurality of spaced apart first protrusion groups 20H, between the two adjacent first protrusion groups 2011 and between the two ends of the light guide plate 20 and the first protrusion group 2〇11 adjacent thereto a second protrusion 2012, wherein the height of the second protrusions 2012 is greater than the first protrusion group 2〇11, and the oppositely disposed second protrusions 2〇12 of the two light guide plates 20 are closed to each other, so that the two light guide plates 2 are A cavity is formed between the first protrusion group 2011 for placing the lamp tube 23. The first protrusion group 20H and the second protrusions 2012 are used to diffuse the light emitted by the lamp tube 23. The light exiting surface 202 is provided with a concave surface 2〇21 which is curved in a radial direction along the radial direction of the bulb 23 in a region opposite to the bulb 23, wherein the radius of curvature of the concave curved surface of the concave surface 2〇21 along the radial direction of the bulb 23 is R> The radius of curvature r of the radial section of the lamp tube 23. The first protrusion group 2011, the second protrusions 2012, and the concave surface 2021 are all disposed along the axial direction of the bulb 23. It can be understood that the concave surface 2021 can also be of a clear type, such as a concave surface having a v-shaped radial cross section. The two cymbals 21 are respectively disposed in parallel on the outer sides of the two light guide plates 2, and the diffusion sheets 22 are respectively disposed on the outer sides of the two cymbals 21 in parallel. The outer frame 25 encloses the bulb 23, the light guide plate 2, the cymbal 21 and the diffusion sheet 22 for fixing them. Please refer to the third figure. The area of the light-emitting surface 202 except the concave surface 2〇21 is a plane. The smooth surface 202 can also be a matte surface, which can function to diffuse light. Referring to the fourth and fifth figures, the first protrusion group 2〇11 of the embodiment is a plurality of triangular prisms, and the two lamps 23 have a radial cross section of a plurality of three (four). The second protrusion means that the section in the radial direction of the lamp joint is a ladder and the lion is shorter on the side of the light guide sheet than on the (four)-bottom side. Λτα \ and, read the ', seven and the first person map. The sixth figure shows the first protrusion group 2011 along the lamp tube 23' of the plurality of triangular faces toward the light guide plate 2 (the outer side of the angle - the angular angle is Θ 'the angle 0 range is 6 〇. ~ 150. The cross section of the buckle can also be a plurality of ones. The other side is the same as the side of the 23rd diameter of the lamp along the 23th of the tube. The first protrusion group 2011 is one of the corners. , , ® corner-angle, or as in the eighth diagram, the first-protrusion group 2011" is a plurality of arcs 1278895 * *, etc. - and see the ninth and tenth figures. The ninth is the second protrusion The cross section of the lamp tube 23 in the radial direction of the lamp tube 23 is not intended to be a trapezoidal shape, and the angle formed by the two waists toward the outer side of the light guide plate 2 is Φ 'the angle Φ ranges from 80 to 175. In addition to the trapezoidal shape, The cross section of the second protrusion 2〇12 along the radial direction of the bulb 23 may have other shapes, such as the triangle of the tenth figure, etc., wherein the angle of the outer direction of the triangle _ guide light plate 2 is Φ, the angle φ, the range is 8〇.~175. It can be understood that the two light guide plates 2〇 may not be identical, and the first protrusion group 2011, the second protrusion 2〇12 of the light incident surface 2〇1 and The concave surface 2〇21 of the light-emitting surface 2〇2 can be varied within the respective parameters. Compared with the prior art, the light-guiding plate 2 of the backlight module 2 of the present embodiment has a light-emitting surface 2〇1 The first protrusion group 2011 and the second protrusions 2〇12 have the effect of diffusing light, so that the backlight module 2 emits light uniformly. The light-emitting surface 2〇2 of the light guide plate 2 is opposite to the concave surface of the tube. 21 cooperates with the first protrusion group 2011 of the lamp officer 23, and diffuses the light of the backlight module 2 facing the area of the lamp tube to make the light more uniform. In addition, the light-emitting surface adopts a matte surface design, which can make the backlight mode The light output of the group 2 is more uniform. Further, the backlight module 2 can be utilized by two liquid crystal panels, which can not only display the kneading surface at the same time, but also improve the light utilization efficiency of the backlight module 2. The present invention also provides a light guide plate. 2〇 injection molding manufacturing method, comprising the steps of: providing a female mold core and a male mold core; forming a pattern complementary to the light exit surface 202 of the light guide plate on the surface of the female mold core; a pattern complementary to the light incident surface 201 of the light guide plate; The male and female molds are clamped and injection molded; the mold is released to form a light guide plate. Further, if the light exit surface 202 is a matte surface, the surface of the female mold core can be processed to form a pattern complementary to the light exit surface 202, and then the lower surface is formed. Step: The surface of the mother mold is subjected to electrode discharge processing to obtain a light-emitting surface having a matte effect. In summary, the invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. In the preferred embodiment of the invention, the scope of the invention is not limited to the above-mentioned actual financial formula, and the equivalent modification or variation of the person who is familiar with the present invention (4) should be covered by the following patent application. 1276895 [Simple description of the drawings] The first figure is a schematic cross-sectional view of a backlight module of the prior art; the second figure is a schematic cross-sectional view of the backlight module of the embodiment of the present invention along the radial direction of the lamp; The perspective view of the light guide plate used in the backlight module of the embodiment; the fourth figure is a perspective view of the light guide plate used in the backlight module of the embodiment of the present invention; the fifth figure is the backlight module of the embodiment of the present invention. A schematic cross-sectional view of the light guide plate along the radial direction of the lamp tube; the sixth figure is an enlarged view of the VI portion of the fifth figure; the seventh and eighth figures are the other two forms of the first-protrusion group along the radial direction of the lamp tube The enlargement of the section is not intended;
第九圖係第五圖之IX部分之放大示意圖； 第十圖係另-種形式之第二突起沿燈管徑向之截面之放大示意圖。 【主要元件符號說明】 背光模組 入光面 第二突起 凹面 擴散片 外框 2 201 2012,2012, 2021 22 導光板 第一突起組 出光面 稜鏡片 燈管 20 2011，2011，，2011” 202 21 23 25The ninth drawing is an enlarged schematic view of a portion IX of the fifth drawing; the tenth drawing is an enlarged schematic view of a cross section of the second protrusion in the radial direction of the lamp. [Description of main component symbols] Backlight module entrance surface 2nd convex concave diffuser frame 2 201 2012,2012, 2021 22 Light guide plate first protrusion group exit surface 稜鏡片灯20 2011,2011,,2011” 202 21 23 25