200846731 九、發明說明： ^ 【發明所屬之技術領域】 - 本發明係涉及導光板結構，特別是一種應用於背光模 組中可提高光線利用率，並提高整體背光模組輝度之導光 板結構。 【先前技術】 按，帶有侧光照明背光單元之液晶顯示器，由於體積 • 小、重量輕、並且亮度均勻，因此於筆記本電腦、車載顯 示器、手機等領域有廣泛應用。液晶顯示器之背光模組係 一個能將分散點光源或線光源轉化成均勻平面光源之光 學機構。隨著液晶顯示器應用領域之拓展，對以導光板為 主之背光技術提出了更高要求，主要表現於：高亮度、低 成本、低能耗、輕薄化等。 如第一圖所示，目前傳統之背光模組1包括光源 10、導光板12、數牧光學膜片以及顯示面板14，根據功 • 能不同，光學膜片分別有··反射片11以及擴散片13。其 中該反射片11係設於導光板12下方，可將未被散射之光 線再導入導光板12中，而擴散片13則設於導光板12上 方，使光線形成漫射而均勻擴散，消除導光板12上所形 成之免區。 而一般導光板12如圖所示，其具有一入光面121、 一與該入光面121相交之底面122，以及一與該底面122 相對之出光面123,該出光面123上設有複數微結構124, 請同時參閱第二圖所示，各微結構124之截面係為三角 200846731 形’且出光面123之表面形成相對稱之第一、二斜角M、 A2,而當光源10之光線由導光板之入光面i2i射入時， 會在該微結構124之側面形成全反射現象，則許多光線將 直接於微結構124正上方出光，因而造成導光板形成亮紋 現象。 【發明内容】 、本發明「導光板及背光模組」即針對應用於背光模組 之導光板加以改良，其主要目的係在於提供一種可提高光 線利用率，並提高整體背光模組輝度之導光板結構。 其中，该導光板具有一入光面、一與該入光面相交之 底面，以及一與該底面相對之出光面；其中，該底面以及 出光面中至少一面設有複數微結構，各微結構與表面間具 有非對稱之第一、二斜角，當光線由入光面進入導光板 後，藉由各微結構之作用可破壞全反射，而形成較佳折射 出光角度。 【實施方式】 為能使貴審查委員清楚本發明之結構組成，以及整 體運作方式，茲配合圖式說明如下： 本發明「導光板及背光模組」，該導光板2之結構如第 三圖之第一實施例所示，其具有一入光面21、一與該入光 面21相交之底面22,以及一與該底面22相對之出光面23 ; 其中，該底面以及出光面中至少一面設有複數微結構，請 6 200846731 同射參閱第四圖所示，各微結構24係設於出光面23上，且 凸出於出光面23設置，各微結構24之截面包括但不限於三 角型’各微結構24與出光面23之表面間具有非對稱之第 一、二斜角Bl、B2，如圖所示B1>B2，以形成不肉斜率之 第一、二斜面Cl、C2。 當本發明之導光板應用於背光模組中時，如第三圖所 示，其设有至少一光源3係設於相對於導光板2之一侧，並 由該導光板之入光面21—侧形成入光，而導光板2之上、 下方可分別進一步設置有擴散片4及反射片5，當光源3之 光線由導光板入光面21—侧形成入光，並藉由不同斜率之 第一、二斜面Cl、C2改變光線的行進路徑，以破壞全反射， 而形成較佳折射出光角度，以提高整體背光模組之輝度。 如第五圖（A)之第二實施例所示，各微結構24係設於 出光面23上，且凹入於出光面23設置，各微結構24與出光 面23之表面間具有非對稱之第一、二斜角以、β2，各微結 構24之截面包括但不限於多邊型，如第五圖（b)所示，各 微結構24之截面係為六邊形且B1<B2;當然，各微結構24 係設於底面22上，如第六圖之第三實施例所示；另外，各 微結構24亦可設於底面22以及出光面23上，如第七圖之第 四實施例所示，各微結構24係均凹入於底面22以及出光面 23設置，而各微結構亦可均凸出於底面以及出光面設置， 或者凸出於底面（或出光面）設置，凹入於出光面（或底 面）設置。 如第八圖之第五實施例所示，各微結構24係凹入於出 7 200846731 光面23之表面設置，且各微結構24凹入之深声係由入， 21朝另侧漸增，亦即Wl<W2<W3<W4<W5<^6<r^光面 ^ ^ ^ i ^ t^ ^ «24#1W^ , 光面23之設置，且各微結構24凸出之高度係 ^ 朝另侧漸增，亦即Η1<Η2<Η3<Η4<Η5<Η6<Η7先 如第十圖之第七實施例所示，各微結構24間係 距，且各微結賴間之間距㈣人光㈣ 減^ 即 Ρ1>Ρ2>Ρ3>Ρ4>Ρ5>Ρ6>Ρ7。200846731 IX. INSTRUCTIONS: ^ Technical Field of the Invention - The present invention relates to a light guide plate structure, and more particularly to a light guide plate structure which is applied to a backlight module to improve light utilization efficiency and improve the brightness of the overall backlight module. [Prior Art] Press, a liquid crystal display with a side-lit backlight unit has a wide range of applications in notebook computers, car displays, and mobile phones due to its small size, light weight, and uniform brightness. The backlight module of the liquid crystal display is an optical mechanism capable of converting a scattered point source or a line source into a uniform planar source. With the expansion of the field of liquid crystal display applications, higher requirements have been placed on the backlight technology based on the light guide plate, mainly in the following aspects: high brightness, low cost, low power consumption, light weight and the like. As shown in the first figure, the conventional backlight module 1 includes a light source 10, a light guide plate 12, a digital optical film, and a display panel 14. The optical film has a reflective sheet 11 and a diffusion according to different functions. Slice 13. The reflection sheet 11 is disposed under the light guide plate 12, and the unscattered light can be further introduced into the light guide plate 12, and the diffusion sheet 13 is disposed above the light guide plate 12 to diffuse and uniformly spread the light, and eliminate the guide. A zone formed on the light panel 12. As shown in the figure, the light guide plate 12 has a light incident surface 121, a bottom surface 122 intersecting the light incident surface 121, and a light exit surface 123 opposite to the bottom surface 122. The light exit surface 123 is provided with a plurality of light emitting surfaces 123. The microstructure 124, please also refer to the second figure, the cross-section of each microstructure 124 is a triangle 200846731 shape 'and the surface of the light-emitting surface 123 forms a first and second oblique angles M, A2, and when the light source 10 When the light is incident from the light incident surface i2i of the light guide plate, a total reflection phenomenon is formed on the side of the microstructure 124, and a plurality of light rays will be directly emitted directly above the microstructure 124, thereby causing the light guide plate to form a bright grain phenomenon. SUMMARY OF THE INVENTION The "light guide plate and backlight module" of the present invention is improved for a light guide plate applied to a backlight module, and the main purpose thereof is to provide a guide for improving light utilization efficiency and improving brightness of the entire backlight module. Light board structure. The light guide plate has a light incident surface, a bottom surface intersecting the light incident surface, and a light emitting surface opposite to the bottom surface; wherein at least one of the bottom surface and the light emitting surface is provided with a plurality of microstructures, and each of the microstructures There is an asymmetrical first and second oblique angle between the surface and the surface. When the light enters the light guide plate from the light incident surface, the total reflection can be destroyed by the action of the microstructures to form a better refracting light angle. [Embodiment] In order to enable the reviewing committee to understand the structural composition of the present invention and the overall operation mode, the following description is given as follows: The "light guide plate and backlight module" of the present invention, the structure of the light guide plate 2 is as shown in the third figure. The first embodiment has a light-incident surface 21, a bottom surface 22 intersecting the light-incident surface 21, and a light-emitting surface 23 opposite to the bottom surface 22; wherein at least one of the bottom surface and the light-emitting surface A plurality of microstructures are provided, please refer to FIG. 4 200846731. The microstructures 24 are disposed on the light-emitting surface 23 and protrude from the light-emitting surface 23, and the cross-sections of the microstructures 24 include but are not limited to triangles. The type 'the microstructures 24 and the surface of the light-emitting surface 23 have asymmetrical first and second oblique angles B1 and B2, as shown in the figure B1 > B2, to form the first and second slopes C1 and C2 of the non-slurry slope. When the light guide plate of the present invention is applied to a backlight module, as shown in the third figure, at least one light source 3 is disposed on one side of the light guide plate 2, and the light incident surface 21 of the light guide plate is provided. The light is formed on the side, and the diffusion sheet 4 and the reflection sheet 5 are further disposed on the upper side and the lower side of the light guide plate 2, and the light of the light source 3 is formed by the light incident surface 21 side of the light guide plate, and is formed by different slopes. The first and second slanting surfaces Cl and C2 change the traveling path of the light to destroy the total reflection, and form a better refracting light angle to improve the brightness of the overall backlight module. As shown in the second embodiment of the fifth embodiment (A), each of the microstructures 24 is disposed on the light-emitting surface 23 and is recessed on the light-emitting surface 23, and the microstructures 24 and the surface of the light-emitting surface 23 are asymmetric. The first and second oblique angles are β2, and the cross sections of the microstructures 24 include, but are not limited to, a polygonal type. As shown in the fifth figure (b), each of the microstructures 24 has a hexagonal cross section and B1 <B2; Of course, each of the microstructures 24 is disposed on the bottom surface 22, as shown in the third embodiment of FIG. 6; in addition, each of the microstructures 24 may be disposed on the bottom surface 22 and the light-emitting surface 23, as shown in the fourth figure. As shown in the embodiment, each of the microstructures 24 is recessed on the bottom surface 22 and the light-emitting surface 23, and each of the microstructures may be protruded from the bottom surface and the light-emitting surface, or protruded from the bottom surface (or the light-emitting surface). Concave to the light exit surface (or bottom surface) setting. As shown in the fifth embodiment of the eighth embodiment, each of the microstructures 24 is recessed on the surface of the surface of the light surface 23 of the 2008, 1987, 31, and the deep sound system of each of the microstructures 24 is recessed, and 21 is gradually increased toward the other side. , that is, Wl < W2 < W3 < W4 < W5 < ^ 6 < r ^ Glossy ^ ^ ^ i ^ t ^ ^ «24 #1W ^ , the setting of the smooth surface 23 , and the height of each microstructure 24 protruding ^ Increasing toward the other side, that is, Η1 < Η 2 < Η 3 < Η 4 < Η 5 < Η 6 < Η 7 first as shown in the seventh embodiment of the tenth figure, each microstructure 24 between the line spacing, and each micro-tie Spacing (four) human light (four) minus ^ instant Ρ 1 > Ρ 2 > Ρ 3 > Ρ 4 > Ρ 5 > Ρ 6 > Ρ 7.
如上所述’本發明提供背光模組一較佳可行之 結構，爰依法提呈發明專利之申請；惟，以上之實施說明 及圖式所示，係本發明較佳實施例者，並·此 明，是以’舉凡與本發明之構造、襄置、特徵等近似 同者，均應屬本發明之創設目的及申請專利範圍之内。田 【圖式簡單說明】 第一圖係為習用背光模組之結構示意圖。 第二圖係為習用導光板之結構示意圖。 第三圖係為本發明中第一實施例導光板應用於背光模組 之結構示意圖。 第四圖係為本發明中導光板第一實施例之部分放大結構 不意圖。 第五圖（Α)、（Β)係為本發明中導光板第二實施例之結構示 意圖。 第六圖係為本發明中導光板第三實施例之結構示意圖。 8 200846731 第七圖係為本發明中導光板第四實施例之結構示意圖。 第八圖係為本發明中導光板第五實施例之結構示意圖。 第九圖係為本發明中導光板第六實施例之結構示意圖。 第十圖係為本發明中導光板第七實施初之結構示意圖。 顯示面板14 導光板2 入光面21 底面22 出光面23 微結構24 光源3 擴散片4 反射片5 【元件代表符號說明】 背光模組1 光源10 反射片11 導光板12 入光面121 底面122 出光面123 微結構124 擴散片13As described above, the present invention provides a preferred and feasible structure of the backlight module, and the application for the invention patent is provided according to the law; however, the above embodiments and drawings show a preferred embodiment of the present invention, and It is to be noted that the same as the structure, the arrangement, the features, etc. of the present invention should be within the scope of the invention and the scope of the patent application. Tian [Simple description of the diagram] The first diagram is a schematic diagram of the structure of the conventional backlight module. The second figure is a schematic structural view of a conventional light guide plate. The third figure is a schematic structural view of a light guide plate applied to a backlight module according to the first embodiment of the present invention. The fourth drawing is a partial enlarged structure of the first embodiment of the light guiding plate of the present invention. The fifth drawing (Α), (Β) is a schematic view of the structure of the second embodiment of the light guiding plate of the present invention. Figure 6 is a schematic view showing the structure of a third embodiment of the light guide plate of the present invention. 8 200846731 The seventh figure is a schematic structural view of a fourth embodiment of the light guide plate of the present invention. The eighth figure is a schematic structural view of a fifth embodiment of the light guide plate of the present invention. The ninth drawing is a schematic structural view of a sixth embodiment of the light guide plate of the present invention. The tenth figure is a schematic structural view of the first embodiment of the light guide plate in the present invention. Display panel 14 Light guide plate 2 Light-incident surface 21 Bottom surface 22 Light-emitting surface 23 Microstructure 24 Light source 3 Diffusion sheet 4 Reflective sheet 5 [Description of component symbols] Backlight module 1 Light source 10 Reflecting sheet 11 Light guide plate 12 Light-incident surface 121 Bottom surface 122 Light-emitting surface 123 microstructure 124 diffusion sheet 13
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