201122576 rijooo 六、發明說明： 【發明所屬的技術領域】 本發明關於一 光距離的導光板， 種導光板，且_是_-種可減少混 以及應用此導光板的背光模組。 【先前技術】201122576 rijooo VI. Description of the Invention: [Technical Field] The present invention relates to a light-distance light guide plate, a light guide plate, and a backlight module capable of reducing mixing and applying the light guide plate. [Prior Art]
隨者電子產業日益發達，輕薄化的液日日日平面顯示器已 逐漸取代傳統猶極射線管顯示ϋ。由於液晶顯示器^是 自發光性的齡㈣，錄藉㈣部絲(如#光模組)達 到顯示效果。以側光式㈣光模組為例，錢設置於導光 板的-側’錢所發出的光束經由人光面進人導光板中， 然後從導光板的出光面射出。 對於-般的導光板而言，光源所發出的光束需在導光 板中行經-段混光距離，才能均句的由導光板射出，導光 板在混光區域中光線分布不均一般將混光區域稱之為非 可視區或無效區。非可視區的範圍越大，用來遮蔽非可視 區的邊框寬度越寬’因此為了達到均勻出光的效果，減少 混光距離，於設計上多會在導光板中設計微結構。 中華民國專利公告號M343817揭露在導光板内部以 雷射雕刻方式形成複數個氣泡，以解決輝度不均之現象。 中華民國專利公告號530919揭露在導光板上設置有複數 個凹洞，适些凹洞卩迎者發光二極體（light emitting diode， 201122576 LED)之位置而分佈，藉此破壞LED光源的指向性並增加 發散角度，減少亮帶的發生，使導光板產生更均勻的散射 光源。美國專利公開號20090051852揭露在導光板的入光 面與LEE)的出光面處中間設有透明彈性體，且透明彈性體 内部有複數散射粒子，以提高發光效率。 【發明内容】 本發明提出一種導光板，可減少混光距離並提高光源 利用率。 本發明另提供一種應用上述導光板的背光模組，可減 少混光距離並提高光源利用率。 本發明的其他目的和優點可以從本發明所揭露的技 術特徵中得到進一步的了解。 為達上述之一或部份或全部目的或是其他目的，本發 明之一實施例提供一種導光板，適於引導發光二極體單元 發出的光束，導光板包含入光面、底面、以及複數個中空 結構。其中’入光面適於使光束經由入光面進入導光板中， 而底面則鄰接於此入光面。複數個中空結構位於導光板中 且鄰近入光面，並排列成一或複數個幾何圖形，且這些中 空結構適於偏折進入導光板中之光束’上述的幾何圖形位 於導光板的非可視區内且適於設置於發光二極體單元的正 上方。 5 201122576 本發明之另一實施例提供一種背光模組。背光模組包 含一或複數個發光二極體單元及上述的導光板。導光板包 含入光面、底面、以及複數個中空結構。一或複數個發光 二極體單元適於發出一光束，且一或複數個發光二極體單 元設置於入光面旁。其中，入光面適於使光束經由入光面 進入導光板中，而底面則鄰接於此入光面。複數個中空結With the development of the electronics industry, the thin and light liquid day and day display has gradually replaced the traditional uranium tube display. Since the liquid crystal display ^ is self-illuminating (4), the recording (four) part of the wire (such as #光模块) achieves the display effect. For example, in the side-light (four) optical module, the light beam emitted from the side of the light guide plate enters the light guide plate through the human light surface, and then is emitted from the light exit surface of the light guide plate. For a general light guide plate, the light beam emitted by the light source needs to pass through the light-diffusing distance in the light guide plate, so that the uniform light is emitted by the light guide plate, and the light distribution of the light guide plate in the light mixing region is generally mixed. The area is called a non-visible area or an invalid area. The larger the range of the non-visible area, the wider the width of the border used to shield the non-visible area. Therefore, in order to achieve uniform light output and reduce the light mixing distance, the microstructure is designed in the light guide plate. The Republic of China Patent Publication No. M343817 discloses that a plurality of bubbles are formed by laser engraving in the interior of the light guide plate to solve the phenomenon of uneven brightness. The Republic of China Patent Publication No. 530919 discloses that a plurality of dimples are provided on the light guide plate to distribute the positions of the light emitting diodes (201122576 LEDs), thereby damaging the directivity of the LED light source. And increase the divergence angle to reduce the occurrence of bright bands, so that the light guide plate produces a more uniform scattering source. U.S. Patent Publication No. 20090051852 discloses the provision of a transparent elastomer between the light incident surface of the light guide plate and the light exit surface of the LEE), and a plurality of scattering particles inside the transparent elastic body to improve luminous efficiency. SUMMARY OF THE INVENTION The present invention provides a light guide plate that can reduce the light mixing distance and improve the utilization of the light source. The invention further provides a backlight module using the above light guide plate, which can reduce the light mixing distance and improve the utilization rate of the light source. Other objects and advantages of the present invention will become apparent from the technical features disclosed herein. In order to achieve one or a part or all of the above or other purposes, an embodiment of the present invention provides a light guide plate adapted to guide a light beam emitted from a light emitting diode unit, the light guide plate including a light incident surface, a bottom surface, and a plurality of Hollow structure. Wherein the light incident surface is adapted to cause the light beam to enter the light guide plate through the light incident surface, and the bottom surface is adjacent to the light incident surface. a plurality of hollow structures are located in the light guide plate adjacent to the light incident surface and arranged in one or a plurality of geometric patterns, and the hollow structures are adapted to deflect the light beam entering the light guide plate. The geometric pattern is located in the non-visible area of the light guide plate. And suitable for being disposed directly above the light emitting diode unit. 5 201122576 Another embodiment of the present invention provides a backlight module. The backlight module includes one or a plurality of light emitting diode units and the above light guide plate. The light guide plate includes a light surface, a bottom surface, and a plurality of hollow structures. One or a plurality of light emitting diode units are adapted to emit a light beam, and one or more light emitting diode units are disposed adjacent to the light incident surface. The light incident surface is adapted to pass the light beam into the light guide plate through the light incident surface, and the bottom surface is adjacent to the light incident surface. Multiple hollow knots
構位於導光板中且鄰近入光面，並排列成一或複數個幾何 圖形，且這些中空結構適於偏折進入導光板中之光束，上 述的幾何圖形位於導光板的非可視區内且適於設置於發光 二極體單元的正上方。 本發明的實施例至少具有以下其中一個優點，在本發 月的上述貝;^例中’導光板包含複數個中空結構，複數個 中空結構㈣成—或複數㈣何圖形且位於導歧的非可 視區内’並位發光二極體的正上方。當光束進人導光板中 時，可經由中空結構多次偏折光線以達到光均勻的效果， 相較於先前脑，本發明之實補的料聽較短，且光 源利用率較高。 ，讓本發明之上述特徵和優點能更明顯易懂，下文 舉複數個實關’並配合所_式，作詳細說明如下。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 6 201122576 以下配合參考圖式之複數個實施例的詳細說明中，將可清 楚的呈現。以下實施例中所提到的方向用語，例如「上」、 下」、「前」、「後」、「左」、「右」等，僅是參考 附加圖式的方向。因此，使用的方向用語是用來說明，而 非用來限制本發明。 D月參閱圖一 A及圖一 B’圖一A為根據本發明之一實 • %例所緣不的導光板；圖一 B為應用圖-A之導光板的背 光模組。 、/圖—A所示，導光板11具有入光面111、鄰接於 入，面111的底面113、與底面113相對的出光面115、以 I數個中空結構117。其中，複數個中空結構117位於 二:反11中，且鄰近於入光面111。如圖一 B所示，背光 取」包含上述的導光板11、至少—發光二極體單元13。 • x二極體單元13設置於導光板11的入光面111旁，當 ^極體單元13發出光束時，光束從人光面m進入導 後反，中，經由位於導光板U中的複數個中空結構117偏折 <出光面115射出。 數個^達到縮短混光距離的功效，於本實施例中，將複 示的坐工結構117排列成一或複數個如圖一 A及圖一 B所 出的非可、目 歲何圖形位於導光板11所定義 非T視區119内（長短虛線所圍成的區域），此非可視 201122576 區119為發光二極體單元13的光束之混光區域。幾何圖形 設置於發光二極體單亓η x L + , . ^ 胚早兀13的正上方。此處的正上方代表的 是幾何圖形的位置，正對著光束出光的位置。換句話說， 此-或複數個由中空結構i i7所排列而成的 幾何圖形的位 置，分別對應於至少一發光二極體單元13。當光束進入導 光板11中，光束被位於非可視區的複數個中空結構117 • 乡次偏折並往各個方向擴散，破壞了原本發光二極體單元 13的问才曰向性，使得光束可在非可視區119中均勻分布， 而達到縮短混光距離的功效。於另一實施例中，為了加強 光束均勾以的財’亦可於導光板u的底面上設置複數 個微結構(未—於圖中），如凹槽、稜鏡結構、或其他# 構’用來反射光束。 於一實施例中，複數個中空結構117可為空心球體、 φ 氣泡、擴散粒子，且可以利用雷射雕刻的方法製成。此外， 還可將複數個中空結構117排列在同一平面上，形成平面 成何圖形，例如：多邊形、扇形、圓形、半橢圓形、戒橢 圓形。請參閱圖二A至圖二d,圖二A至圖二D為根據 本發明之另一貫施例所綠示的背光模組。圖二A參JI〆P 所示之背光模組2、3、4、5的構造如上述實施例戶斤述，同 樣包含如圖一 B所示之發光二極體單元13及導光板11、 以及位於導光板11中的複數個中空結構117，不同處在於 201122576 illνυΟ 複數個中工結構117排職如圖二A所示的三角形；如圖 一斤示的半圓形，如圖二C所示的梯形；或如圖二^ 所不的半Hi形。上述的平面幾何靴僅是絲說明 不以此為限。 亚 再者’遇可將複數個中空結構117排列在不同的平面 t形成立體幾何圖形，例如圖—A中的三角柱體，或者Arranging in the light guide plate adjacent to the light incident surface and arranging into one or a plurality of geometric shapes, and the hollow structures are adapted to be deflected into the light beam in the light guide plate, wherein the geometric pattern is located in the non-visible area of the light guide plate and is suitable for It is disposed directly above the light emitting diode unit. The embodiment of the present invention has at least one of the following advantages. In the above-mentioned example of the present month, the light guide plate includes a plurality of hollow structures, a plurality of hollow structures (four) into - or a plurality of (four) patterns and are located in the non-discrimination Directly above the 'parallel light-emitting diode' in the visible area. When the light beam enters the light guide plate, the light can be deflected multiple times through the hollow structure to achieve a uniform light effect. Compared with the prior brain, the solid material of the present invention is shorter and the light source utilization rate is higher. The above features and advantages of the present invention will become more apparent and understood, and the following will be described in the following. [Embodiment] The foregoing and other technical contents, features, and advantages of the present invention will be apparent from the detailed description of the <RTIgt; The directional terms mentioned in the following embodiments, such as "upper", "down", "front", "back", "left", "right", etc., refer only to the direction of the additional drawing. Therefore, the directional terminology used is for the purpose of illustration and not limitation. Referring to FIG. 1A and FIG. 1B, FIG. 1A is a light guide plate according to one embodiment of the present invention; FIG. 1B is a backlight module using the light guide plate of FIG. As shown in Fig. A, the light guide plate 11 has a light incident surface 111, a bottom surface 113 adjacent to the surface 111, a light exit surface 115 opposed to the bottom surface 113, and a plurality of hollow structures 117. Wherein, the plurality of hollow structures 117 are located in the two: the reverse 11 and adjacent to the light incident surface 111. As shown in FIG. 1B, the backlight includes the light guide plate 11 and at least the light emitting diode unit 13. The x-diode unit 13 is disposed beside the light-incident surface 111 of the light guide plate 11. When the gate unit 13 emits a light beam, the light beam enters the guide light from the human light surface m, and then passes through the plurality of light-guiding plates U. The hollow structures 117 are deflected < the light exit surface 115 is emitted. In the embodiment, the duplicated structure 117 is arranged into one or a plurality of non-corresponding graphs as shown in FIG. 1A and FIG. The light panel 11 defines a non-T viewing zone 119 (a region surrounded by long and short dashed lines), and this non-visible 201122576 region 119 is a light mixing region of the light beam of the light emitting diode unit 13. The geometry is set directly above the light-emitting diodes 亓 x L + , . ^ embryos. The top right here represents the position of the geometry, facing the position where the beam exits. In other words, the position of the geometric pattern in which the plurality of hollow structures i i7 are arranged corresponds to at least one of the light emitting diode units 13, respectively. When the light beam enters the light guide plate 11, the light beam is deflected by the plurality of hollow structures 117 located in the non-visible area, and is diffused in various directions, thereby destroying the orientation of the original light-emitting diode unit 13 so that the light beam can be It is evenly distributed in the non-visible area 119, and the effect of shortening the light mixing distance is achieved. In another embodiment, a plurality of microstructures (not in the figure), such as grooves, 稜鏡 structures, or other structures, may be disposed on the bottom surface of the light guide plate u in order to enhance the beam. 'Used to reflect the beam. In one embodiment, the plurality of hollow structures 117 may be hollow spheres, φ bubbles, diffusing particles, and may be fabricated by laser engraving. In addition, a plurality of hollow structures 117 may be arranged on the same plane to form a plane, such as a polygon, a sector, a circle, a semi-ellipse, or an ellipse. Referring to FIG. 2A to FIG. 2D, FIG. 2A to FIG. 2D are backlight modules according to another embodiment of the present invention. The structure of the backlight modules 2, 3, 4, and 5 shown in FIG. 2A is the same as that of the above embodiment, and also includes the LED unit 13 and the light guide plate 11 as shown in FIG. And a plurality of hollow structures 117 located in the light guide plate 11, the difference is 201122576 illνυΟ a plurality of middle-structured structures 117 rows of triangles as shown in Figure 2A; as shown in Figure 1C, The trapezoid shown; or the half-Hi shape as shown in Figure 2. The above-mentioned flat geometric boots are only for illustrative purposes. The sub-canon can arrange a plurality of hollow structures 117 on different planes to form a solid geometric figure, such as a triangular cylinder in Fig. A, or
疋一角柱以外的立體幾何圖形，例如柱體、半柱體、球體、 半球體、或錐體。請參關三A至圖三B，@三八及圖三 B為根據本發明之3—實關靖示的背光餘。圖三a 至圖一 B所不之背光模組6、7的構造類似於圖二a至圖 二D ’同樣包含上述的導光板u、至少一發光二極體單^ 13 ’但複數個中空結構m則排列成如圖三a之四角柱及 圖三B之半圓柱體。在此要別說明的是，上述的形狀僅曰 用來說明，本發明並不以此為限。 疋 如圍 所不，為了達到更好的均勻效果，複數個中 二結構117所排列之幾何圖形，鄰近於入光φ 1U的—妓 的寬度W1小於鱗於_於人光面的另—端的 W2。中空結構117的數目可隨著其舆縣二極體單元見= 距離而增加。靠近入光面U1的中空結構η?的數 可避免發光二極體單元13所發㈣絲於進人導光板 中就全部被反射回來H中空結構ιΐ7的位置正對著 201122576 rιiυου 光極體單元的位置13 ’則可有效偏折光束，因此將幾 何圖形的位置設置成其幾何中心lm與其所對應的發光 二極體單元13的幾何中心〗31的連線大虹垂直於入光面 111。 如圖-3至圖三B所示之導光模組卜2、3、4、5、 6、7’於-實施例中’還可包括用來覆蓋非可視區ιΐ9的 # 麟罩。請參關四，圖四為根據本發明之另—實施例所 s勺月光板組。圖四所不之背光模組8的構造類似於圖 —B之背光模組1’包含發光二極體單元83與具有入光面 ^ ‘光板81、以及位於導光板81的非可視區819中的 、—個中工U冓817。除此之外，圖四之背光模組8還包 射罩85 ’其中至少—發光二極體單元83設置於該反 射罩85上，且反射罩85覆蓋非可視區幻9。 » 、一於一實施例中’為了減少熱點(hotspot)的產生，還可 ^ /在上述貫施例的導光板之人光面上形成複數個微結 明另H關五A至圖五E ’圖五A至圖五E為根據本發 3、/施例所緣示的背光模組正視圖。圖五A至圖五E 2光模組9的構造同樣類似於圖-B之背光模組！，包 :發光二極體單元93及導光板9卜以及位於導敍91中 9:數個中空結構917。除此之外，於導光板％的入光面 上更形成複數個微結構919,這些微結構9Π可為圖五 201122576 麗 1 I vt»0 A至圖五C所示之V形凹槽、圖五D所示之半圓形四槽 或者是如圖五E所示的凹槽與凸起結構的組合，其分佈可 為圖五A所示的連續分佈，或者如圖五B、圖五c以—對 一、多對一的分佈方式對應於發光二極體93。A solid geometry other than a corner post, such as a cylinder, a semi-cylinder, a sphere, a hemisphere, or a cone. Please refer to Guan A3 to Figure 3B, @三八 and Figure 3B as the backlight of the 3 - Shi Guanjing according to the present invention. The structure of the backlight modules 6, 7 shown in FIG. 3a to FIG. 1B is similar to that of FIG. 2a to FIG. 2D. The same includes the above-mentioned light guide plate u, at least one light-emitting diode single ^ 13 ' but a plurality of hollow The structure m is arranged as a four-column column as shown in Fig. 3a and a half cylinder in Fig. 3B. It is to be noted that the above-described shapes are only used for illustration, and the present invention is not limited thereto. For example, in order to achieve a better uniform effect, the geometric pattern of the plurality of second structures 117 is arranged, and the width W1 of the 妓 adjacent to the light φ 1U is smaller than the other end of the illuminating surface of the human surface. W2. The number of hollow structures 117 may increase as their Jixian diode unit sees = distance. The number of hollow structures η? near the entrance surface U1 can prevent the light emitted from the LED unit 13 from being reflected back into the light guide plate. The position of the hollow structure ιΐ7 is directly opposite to the 201122576 rιiυου photoelectrode unit. The position 13' can effectively deflect the beam, so the position of the geometric figure is set such that its geometric center lm and its corresponding geometric center of the light-emitting diode unit 13 are perpendicular to the light-incident surface 111. The light guiding modules 2, 3, 4, 5, 6, 7' shown in Figures -3 to 3B may also include a # lining for covering the non-visible area ι 9 . Please refer to FIG. 4, which is a set of moonlight panels according to another embodiment of the present invention. The backlight module 8 of FIG. 4 is similar in structure to the backlight module 1 ′ of FIG. B, and includes a light-emitting diode unit 83 and a light-emitting surface 81 and a non-visible area 819 located in the light guide plate 81. , a Chinese worker U冓817. In addition, the backlight module 8 of FIG. 4 also includes a cover 85', at least the light-emitting diode unit 83 is disposed on the reflective cover 85, and the reflective cover 85 covers the non-visible area. » In one embodiment, 'in order to reduce the generation of hotspots, it is also possible to form a plurality of micro-junctions on the light surface of the light guide plate of the above-mentioned embodiment, and another H off five A to five E FIG. 5A to FIG. 5E are front views of the backlight module according to the third embodiment of the present invention. Figure 5A to Figure 5E The structure of the E2 light module 9 is similar to the backlight module of Figure-B! , package: light-emitting diode unit 93 and light guide plate 9 and located in guide 91 9: a plurality of hollow structures 917. In addition, a plurality of microstructures 919 are formed on the light-incident surface of the light guide plate, and the microstructures 9 can be V-shaped grooves shown in FIG. 5 201122576 丽1 I vt»0 A to FIG. The semicircular four-groove shown in FIG. 5D is a combination of the groove and the convex structure as shown in FIG. 5E, and the distribution thereof may be a continuous distribution as shown in FIG. 5A, or as shown in FIG. 5B and FIG. c corresponds to the light-emitting diode 93 in a one-to-one, many-to-one distribution.
綜上所述，本發明的實施例至少具有以下其中一個優 點，於本發明之一實施例中的導光板及背光模組，包含複 數個中空結構’複數個中空結構排列成—或複數個幾何圖 形且位於導光板的非可視區内，且複數個中空結構位於發 光二極體的正上方。當光束進人導光板中時，可經由中^ 結構多次偏折光線以達到光均勾的效果，相較於先前: 術’本發明之實施例的混光轉触，且光關轉較高。 惟以上所述者，僅為本發明之較佳實施例而已， 能以此限定本發明實施之範圍，即纽 : 屬本發明專利涵蓋之範圍内與修掷’皆仍 ==圍不須f顯所揭露之全部目的或優點 尋之、，摘要部分和標聰Μ來獅專利文件搜 用’並非用來限制本發明之權利範圍。 【圖式簡單說明】 "為根據本發明之一實施例所緣示的導光板。 圖一Β為根據本發明之-實施例所緣示的背光模組 11 201122576 圖二A至圖二D為根據本發明之另一實施例所繪示 的背光模組。 圖三A至圖三B為根據本發明之另一實施例所繪示的 背光模組。 圖四為根據本發明之另一實施例所繪示的背光模組。 圖五A至圖五E為根據本發明之另一實施例所繪示的 背光模組正視圖。 【主要元件符號說明】 卜2、3、4、5、6、7、8:背光模組 1卜81、91 :導光板 111、811、911 :入光面 113 :底面 115 :出光面 117、817、917 :中空結構 1171、131 :幾何中心 119、819 :非可視區 13、83、93 :發光二極體單元 919 :微形結構 85 :反射罩In summary, the embodiment of the present invention has at least one of the following advantages. In one embodiment of the present invention, the light guide plate and the backlight module comprise a plurality of hollow structures, a plurality of hollow structures arranged in a plurality of geometric structures. The figure is located in the non-visible area of the light guide plate, and a plurality of hollow structures are located directly above the light emitting diode. When the light beam enters the light guide plate, the light can be deflected multiple times through the middle structure to achieve the effect of light homogenization, compared with the previous: the mixed light touch of the embodiment of the present invention, and the light is turned off. high. However, the above is only the preferred embodiment of the present invention, and can limit the scope of the implementation of the present invention, that is, the range covered by the patent of the present invention and the repairing are still == It is not intended to limit the scope of the present invention to the full extent of the disclosure of the invention. BRIEF DESCRIPTION OF THE DRAWINGS " is a light guide plate according to an embodiment of the present invention. FIG. 2 is a backlight module according to another embodiment of the present invention. FIG. 2A to FIG. 2D are diagrams showing a backlight module according to another embodiment of the present invention. FIG. 3A to FIG. 3B are diagrams showing a backlight module according to another embodiment of the present invention. FIG. 4 is a backlight module according to another embodiment of the present invention. 5A to FIG. 5E are front views of a backlight module according to another embodiment of the present invention. [Main component symbol description] Bu 2, 3, 4, 5, 6, 7, 8: backlight module 1 卜 81, 91: light guide plates 111, 811, 911: light-incident surface 113: bottom surface 115: light-emitting surface 117, 817, 917: hollow structure 1171, 131: geometric center 119, 819: non-visible area 13, 83, 93: light-emitting diode unit 919: micro-structure 85: reflector
Wl、W2 :寬度 12Wl, W2: width 12