201131220 GLT09033TW(I) 33169twf.doc/n 六、發明說明： 【發明所屬之技術領域】 本發明是^於-種導光板、背光模組以及光線傳導 0]fr ^ /丄 / ^ 々合 j. 、首 « 兩個導光板之間 •勺免線之^光板的光學結構設計，以及使用該 板的背光模組與光線傳導方法。 【先前技術】201131220 GLT09033TW(I) 33169twf.doc/n VI. Description of the Invention: [Technical Field] The present invention is a light guide plate, a backlight module, and light conduction 0] fr ^ /丄/ ^ j j. , the optical structure of the first « between the two light guides, the spoon-free line, and the backlight module and light transmission method using the board. [Prior Art]
液晶顯示器包括液晶顯示面板與背光模組。隨著液晶 =的輕、薄發展趨勢，逐漸採用了厚度較薄的側面入 、月光杈組，其大致是由發光二極體（Ught E論㈣ Diode，LED)與導光板所組成。 一 ‘光板疋光學精度相當高的光學元件。為了使從發光 極虹出射的線光源經由導光板而轉變成均勻的面光源， 所以在導光板的Λ光面通常會設置絲射醜，且該光散 射圖案疋·連續變化的形態。 μ而，當有拼接多個導光板的需求時（例如，將多個 J面積的導光板拼接組合成—個大面積的導光板，以應用 在大尺寸液晶顯不器中；或者，需分區照明而拼接多個導 光板:不同的導光板可各自進行導光），若將多個導光板 上下拼接或者左右拼接時，相鄰的兩個導光板的相接處， 將因為光源相互影響而產生極明顯的亮線。 圖1為習知的拼接式導光板的俯視示意圖、以及沿著 向的面光源的能量示意圖。請參照圖1，由於導光板 201131220 GLT09033TW(I) 33169twf.doc/n 的光散射圖案（未!會示）是連續變化的，所以 二光,100 (圖1中緣示三個）時’在導光板二的“ &G (圖1中，以粗線表示）產生的不連續，使得拼产 =的面光源的能量特職出，而產生明顯亮線b。如此， 曰降低拼接後的導光板m所提供的面先源的均句度。 【發明内容】 有鑑於此，本發明提供—種導光板，具有 結構而能㈣除拼接的兩辦光板之 本發明提供一種背光 广線 提供均勾的面光源。&且使用上述的導光板，而能 本發明提供一種光後值土 而能提供均勻的岐Ϊ料枝，❹上蘭導光板， 本發明提出-種導光板，具有上表面 板具有多個導光區域，每—導；；下表面導先 邊與第二邊。在第-邊處設 :到=板中;括光”傳輪方向與第二邊的延伸方向平 :=置在導光板的上表面與下表面 先線π夠於上述條狀凸起物中傳輸。 源。一種背光模組，包括：導光板以及光 導先板具有多個導光區 板包括多個條狀凸起物，沿著第二逢的延伸二= 201131220 uuwd3TW(I) 33169twf.doc/n 導光板的上表面與下表面至少其中之一。光源設置在第— 邊處。此光源提供光線入射到導光板中。光線的傳輸方向 與第二邊的延伸方向平行，使光線能夠於上述條狀凸起物 中傳輸。 在本發明的一實施例中’上述的導光板更包括：光散 射圖案，設置在條狀凸起物上。 在本發明的一實施例中，上述靠近光源的光散射圖案 的密度比遠離光源的光散射圖案的密度低。 • 在本發明的一實施例中，利用雷射 '噴沙或蝕刻方式 在條狀凸起物上形成光散射圖案。 ，在本發明的一實施例中，上述的每一條狀凸起物的剖 面形狀包括.半圓形、四邊形或三角形。 ^在本發明的—實施例中，上述的條狀凸起物為彼此連 續相接、等續相接或不等續相接。 ,在本發明的一實施例中，上述的條狀凸起物的高度為 彼此相等、規則變化或不規則變化。 又 • 在本發明的—實施例中，上述在相鄰的兩個導光區域 之間設置有一溝槽。 之門月的—實施例中，上述在相鄰的兩個導光區域 之間δ又置有一切斷面。 在，的—實施例中’上述的條狀凸起物同時設置 在5玄上表面與該下表面。 相鄰提出一種光線傳導方法’用以消除導光板的 相郇兩個導光區域之間產生的亮線，其中，導光板具有上 5 201131220 GLT09033TW(I) 33169hvf.doc/n 表面與下表面，每一導光區域具有彼此相鄰的第一邊與第 二邊’在第-邊歧置有光源、且祕提供紐人射到導 光板中’光線的傳輸方向與第二邊的延伸方向平行。此光 線傳導方法包括：沿料光板的第二邊的延伸方向，在導 光板的上表面與下表面至少其中之—上設置多個條狀凸起 物，使光線能夠於條狀凸起物中傳輸。 基於上述’本發明的導光板具有特殊的光學結構（即 备、狀凸起物）可’肖除拼接多個導光板的拼接處的明顯亮 線。另外’可依照需求而採㈣#的光學設計，在條狀凸 起物上^設置光學散射gj案；或者，可改變條狀凸起物的 間距、高度等’而得到所需要的面光源分布。使用上述導 光板的背光模㈣及光線傳導方法可提供料的面光源。 —為讓本發明之上述特徵和優點能更明顯祕，下文特 舉實施例，並配合所附圖式作詳細說明如下。 【實施方式】 本發明的導光板具有特殊的光學結構，所以，當拼接 夕個導光板時，可以消除②光板的拼接處_顯亮線。以 L將舉綠财_，齡_切於本㈣進行詳細 的解說。 圖2為本發明較佳實施例的—種導光板的示意圖。請 2圆2 ’導先板2〇〇具有上表面鳥與下表面屬。導 =具有多個導光區域21〇，每—導光區域21〇具有 彼此相鄰的第-邊212與第二邊214。在第—邊212處設 201131 沒L_ 〜 二提供光線[入射到導光板2⑻中。 第二邊214的延伸方向平行。此導光 夕固條狀凸起物220，沿著第_邊214 μ 伸方向而設置在導来杯9ΛΛ认“考弟—邊214的延 至少並中之_。光的上表面2GGa與下表面2_ ^2中= 曰夠於"^條狀凸起物220中傳輸。 220 ^上'，以局部放大的方式來表示條狀凸起物 220 4際上，條狀凸起物22()的尺寸 顯辨識，且使多個條狀八減精八士 Π目艮無法明 ㈣分布於導光板200上。 特別疋’可>主思到’在圖2中 域210之間設置有溝槽2 =兩個¥先£ 雜射Γ 可_—體成型、 多，二工，直接在導光板200上劃分出多個導光區 =210。母一個導光區域21〇可以各自進行分區導ί。如 圖2所示’在設置條狀凸起物22Q之後，可消除2 溝槽23G處發生的亮線’後續於圖4再詳細進行說明: 接方林㈣紐實齡㈣_導歧的拼 接方式的側面以圖。料參照圖从，在相_兩個導光 區域210之間設置有溝槽23〇。換言之，可將每一個 ::210視為一個小面積的導光板’經由—體成型且刻劃 溝槽2·㈣方式而形成為—個大面積的導光板獅 夠進行分區導光。 此 另外’請參照圖SB ’也可在相鄰的兩個導光區域2ι〇 之間設置有崎面C。換言之，可將每—個導光區域训 視為-個小面積的導光板’經由彼此拼接的方式而形成為 -個大面積的導光板20G。特別是，以圖3B為例來說明'、'， 201131220 GLT09033TW(1) 33I69twf.doc/n 條狀凸起物220可以同時設置在上表面2〇〇a與下表面 200b ;當然，條狀凸起物220也可僅設置在上表面2〇〇a， 或僅設置在下表面200b。 圖4為本發明較佳實施例的導光板的俯視示意圖、以 及沿著X方向的面光源的能量示意圖。請參照圖4，當拼 接多個導光板200時，在導光板200的拼接處g原本會產 生明顯冗線。然而，透過設置多個條狀凸起物220，可使 面光源的能量呈現均勻的分佈。比較習知的圖丨，可明顯 知道，圖4中於拼接處g的面光源的能量並不會特別突 出，而能夠消除視覺上的明顯亮線。 圖5A〜圖5C為本發明較佳實施例的三種條狀凸起物 的剖面形狀的示意圖。請共同參照圖5A〜圖5C，每一條 狀凸起物220的剖面形狀可以是半圓形（如圖5A所示）、 二邊形（如圖5B所示）或三角形（如圖5C所示）。當然， 還可以是其他合適的形狀。可以利賴仁（未繪示）對光 學板進行壓印’而製得具有條狀凸起物220的導光板200。 對應於上述圖5A〜圖5C的條狀凸起物的剖面形狀， 模仁上會製作R溝（對應於圖5A的半卿）、矩溝（對 應於圖5B的四邊形）與乂溝（對應於圖5。的三角形）。 圖6為本發㈣佳實關的又—種導光板的示意圖。 °二“、、圖6 一此導光板202與圖2的導光板200類似，相 同的兀件標和_的符號。值得注意的是，導光板202 可更包括.光散射圖案謂，設置在條狀凸起物220上。 可利用雷射、切或_方式等，祕狀凸起物220上形 201131220 GLT090337 W(i) 33169twf.doc/n 。並且’可調整不同位置的光散射圖案 的刀布挽度’例如，可使得靠近光源s的光散安 240的分布密度比遠離統s的光散射_ 的分布二 ίί越Γ=Γ越遠離光源s的位置，光線l的衰； Ϊ Ϊ么IS光散射圖案240的分布密度的調整方 1出射的處的位置得到較高的光散射效果以增The liquid crystal display includes a liquid crystal display panel and a backlight module. With the light and thin development trend of liquid crystal =, the thin side inlet and moonlight 杈 group are gradually adopted, which is roughly composed of a light-emitting diode (Ught E (4) Diode, LED) and a light guide plate. An optical component with a relatively high optical precision. In order to convert the line light source emitted from the illuminating element into a uniform surface light source via the light guide plate, the illuminating surface of the light guide plate is usually provided with a smear, and the light scatter pattern 连续· continuously changes. μ, when there is a need to splicing a plurality of light guide plates (for example, splicing a plurality of J-area light guide plates into a large-area light guide plate for use in a large-size liquid crystal display device; or, partitioning is required) Illuminating and splicing a plurality of light guide plates: different light guide plates can respectively conduct light guides. If a plurality of light guide plates are spliced or spliced left and right, the intersection of two adjacent light guide plates will be affected by the mutual influence of the light sources. Produces a very bright line. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic top plan view of a conventional spliced light guide plate, and an energy diagram of a surface light source along a direction. Referring to FIG. 1, since the light scattering pattern (not shown) of the light guide plate 201131220 GLT09033TW(I) 33169twf.doc/n is continuously changed, two light, 100 (three in the figure 1) is The discontinuity generated by the &G (in Figure 1, indicated by the thick line) of the light guide plate 2 causes the energy of the surface light source of the spelling = to be out of service, resulting in a distinct bright line b. Thus, the splicing is reduced. In view of the above, the present invention provides a light guide plate having a structure and capable of (4) splicing two light panels. The present invention provides a backlight wide line providing The present invention provides a light guide plate, and the present invention provides a light-receiving soil to provide a uniform ramming material, and a blue light guide plate. The upper surface plate has a plurality of light guiding regions, each guiding; the lower surface guiding the first side and the second side. At the first side: at: the plate; the light "the direction of the transmission wheel and the extension direction of the second side" Flat: = placed on the upper surface of the light guide plate and the lower surface π is sufficient for the above strip protrusion Transmission. source. A backlight module includes: a light guide plate and a light guide plate having a plurality of light guide plates including a plurality of strip-shaped protrusions, extending along the second square=201131220 uuwd3TW(I) 33169twf.doc/n light guide plate At least one of the upper surface and the lower surface. The light source is set at the first edge. This light source provides light into the light guide. The direction of light transmission is parallel to the direction in which the second side extends so that light can be transmitted through the strip-like projections. In an embodiment of the invention, the light guide plate further includes: a light scattering pattern disposed on the strip-shaped protrusions. In an embodiment of the invention, the density of the light scattering pattern adjacent to the light source is lower than the density of the light scattering pattern away from the light source. • In an embodiment of the invention, a light scattering pattern is formed on the strip-like protrusions by laser sandblasting or etching. In an embodiment of the invention, the sectional shape of each of the strip-shaped protrusions includes a semicircular shape, a quadrangular shape or a triangular shape. In the embodiment of the present invention, the above-mentioned strip-like projections are continuously connected to each other, or sequentially connected or unequally connected. In an embodiment of the invention, the height of the strip-like projections is equal to each other, regularly varying or irregularly changing. Further, in the embodiment of the invention, a groove is provided between the adjacent two light guiding regions. In the embodiment of the door, the above-mentioned δ is placed between the adjacent two light guiding regions. In the embodiment, the strip-like projections described above are simultaneously disposed on the upper surface of the upper surface and the lower surface. Adjacently, a light-conducting method is proposed to eliminate the bright line generated between the two light-guiding regions of the light guide plate, wherein the light guide plate has a surface and a lower surface of the upper surface of the 3201131220 GLT09033TW(I) 33169hvf.doc/n. Each of the light guiding regions has a first side and a second side adjacent to each other. A light source is disposed on the first side, and a light source is provided in the light guide plate. The transmission direction of the light is parallel to the extending direction of the second side. . The light transmission method includes: a plurality of strip-like protrusions are disposed on at least one of the upper surface and the lower surface of the light guide plate along the extending direction of the second side of the light guide plate, so that the light can be in the strip-shaped protrusion transmission. The light guide plate based on the above-mentioned 'the present invention has a special optical structure (i.e., a projection, a protrusion) can eliminate the apparent bright line of the splicing portion of the plurality of light guide plates. In addition, 'the optical design of (4)# can be selected according to the requirements, and the optical scattering gj case can be set on the strip-like protrusions; or the pitch, height, etc. of the strip-shaped protrusions can be changed to obtain the desired surface light source distribution. . The surface light source of the material can be provided by using the backlight module (4) of the above-mentioned light guide plate and the light transmission method. In order to make the above features and advantages of the present invention more comprehensible, the following embodiments are described in detail with reference to the accompanying drawings. [Embodiment] The light guide plate of the present invention has a special optical structure, so that when the light guide plates are spliced, the splicing position of the two light plates can be eliminated. L will raise the green money _, the age _ cut in this (four) for a detailed explanation. 2 is a schematic view of a light guide plate according to a preferred embodiment of the present invention. Please 2 round 2 ′ lead plate 2〇〇 with upper surface bird and lower surface genus. The guide has a plurality of light guiding regions 21A, and each of the light guiding regions 21A has a first side 212 and a second side 214 adjacent to each other. At the first side 212, 201131 is not provided. L_ 〜 2 provides light [into the light guide plate 2 (8). The extending direction of the second side 214 is parallel. The light guiding strip-shaped protrusion 220 is disposed along the extending edge of the first side 214 μ in the guide cup 9 ΛΛ “ 考 考 考 考 边 边 边 边 214 214 214 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The surface 2_^2 = 曰 is transmitted in the "^ strip-like protrusion 220. 220 ^上', in a partially enlarged manner, the strip-shaped protrusion 220 4 , strip-like protrusion 22 ( The size of the display is clearly recognized, and a plurality of strips of eight condensed octopus are not clearly visible (four) distributed on the light guide plate 200. In particular, 'can be> 'thinking' is set between the fields 210 in FIG. Trench 2 = two ¥ first 杂 Γ _ _ _ body shaping, multiple, two work, directly on the light guide plate 200 divided into a plurality of light guide area = 210. The mother a light guide area 21 〇 can be partitioned As shown in Fig. 2, 'after setting the strip-shaped protrusions 22Q, the bright lines occurring at the 2 grooves 23G can be eliminated'. This will be further described in detail in Fig. 4: Connection forest (4) New Reality (4) _ The side of the splicing manner is shown in the figure. From the reference picture, a groove 23 is provided between the two light guiding regions 210. In other words, each :: 210 can be regarded as a small area. The light plate is formed by a body-molding and scribed groove 2·(4) method to form a large-area light guide plate lion capable of partitioning light guide. This other 'Please refer to FIG. SB' can also be adjacent to two light guides. A region C is provided with a surface C. In other words, each of the light guiding regions can be regarded as a small-area light guide plate spliced into a large-area light guide plate 20G. Yes, taking FIG. 3B as an example to illustrate ',', 201131220 GLT09033TW(1) 33I69twf.doc/n strip protrusions 220 can be simultaneously disposed on the upper surface 2〇〇a and the lower surface 200b; of course, strip-like protrusions The object 220 may also be disposed only on the upper surface 2A, or only on the lower surface 200b. Fig. 4 is a top plan view of a light guide plate according to a preferred embodiment of the present invention, and an energy diagram of the surface light source along the X direction. Referring to FIG. 4, when a plurality of light guide plates 200 are spliced, a significant redundant line is originally generated at the splicing portion g of the light guide plate 200. However, by providing a plurality of strip-shaped protrusions 220, the energy of the surface light source can be made uniform. Distribution. Comparing the well-known maps, it is obvious that in Figure 4 The energy of the surface light source at the splicing point g is not particularly prominent, and the visually bright line can be eliminated. Fig. 5A to Fig. 5C are schematic views showing the cross-sectional shapes of three strip-shaped protrusions according to a preferred embodiment of the present invention. Referring to FIG. 5A to FIG. 5C together, the cross-sectional shape of each strip-shaped protrusion 220 may be semi-circular (as shown in FIG. 5A), quadrilateral (as shown in FIG. 5B) or triangular (as shown in FIG. 5C). Of course, other suitable shapes are also possible. The light guide plate 200 having the strip-shaped protrusions 220 can be obtained by embossing the optical plate by Lilyen (not shown). Corresponding to the cross-sectional shape of the strip-like protrusions of FIGS. 5A to 5C described above, R grooves (corresponding to the half-curve of FIG. 5A), rectangular grooves (corresponding to the quadrilateral of FIG. 5B), and gullies are formed on the mold core (corresponding to Figure 3 of the triangle). Fig. 6 is a schematic view of another type of light guide plate of (4) Jiashiguan. The second light guide plate 202 is similar to the light guide plate 200 of FIG. 2, and the same element is marked with a symbol of _. It is noted that the light guide plate 202 may further include a light scattering pattern, which is disposed at On the strip-shaped protrusions 220. Laser, cut or _ mode can be used, and the secret protrusions 220 are shaped like 201131220 GLT090337 W(i) 33169twf.doc/n. And 'the light scattering pattern of different positions can be adjusted. The knife cloth degree 'for example, can make the distribution density of the light dispersion 240 close to the light source s be smaller than the distribution of the light scattering _ away from the system s. Γ = Γ away from the position of the light source s, the decay of the light l; Ϊ Ϊ The position of the distribution density of the IS light scattering pattern 240 is adjusted to obtain a higher light scattering effect.
‘散射效杲、、壳度;而靠近光源s的位置可得到較低的 先^射效果，以避免切的光線L 板2 0 2將可得到更均勻的面光源。 ㈣而。導先 類似地，為了得到所需的面光源的 f光學設計需求來調整條狀凸起物的連接方式t是二 可為彼此遠濟她f 多個條狀凸起物220 也可為等續;:接並;再多個條狀凸起物22。 間距均為Μ。請再參1圖7^固條狀凸起物220之間的 為不等續相接，其中回 夕個條狀凸起物220也可 距可為（Π、d2、d3。 個條狀凸起物220之間的間 圖8A〜圖8C為本發明齡杜每 的高度變化方式的示意圖。在圖的二種條狀凸起物 起物⑽為等續相接的方式來H8c中’以條狀凸 起物_的連接方式或高條狀凸 ^合笨請先參照圖8A’多個條起 此相4’亦即’高度均“1。請再參二：： 201131220 GLT09033TW(I) 33169twf.doc/n 凸起物220的高度也可為規則變化，其中，條狀凸起物220 的高度hi、h2、h3例如可以是線性變化。請再參照圖8C， 多個條狀凸起物220的高度也可為不規則變化，其中，條 狀凸起物220的高度hi、h2、h3可以是任意變化。 圖9為本發明較佳實施例的一種背光模組的示意圖。 請參照圖9’此背光模組300包括：導光板310以及光源S。 導光板310可以採用上述的導光板200或導光板202。關 於導光板200或導光板202的詳細内容，在此不予以重述。 另外，光源S可以採用發光二極體。由此，背光模組3〇〇 φ 即使使用拼接式的導光板31〇，仍可以消除拼接處g所產 生的亮線，而提供均勻的面光源FL。 另外’本發明還提出一種光線傳導方法。在一實施例 中’此光線傳導方法使用上述的導光板2〇〇或2〇2。關於 導光板200、202的詳細内容在此不予以重述。此光線傳導 方法的特點在於：沿著導光板200的第二邊214的延伸方 白在導光板200的上表面2〇〇a與下表面2〇〇b至少其中 之一上設置多個條狀凸起物22〇 ’使光線L能夠於條狀凸 起物220中傳輸。如此一來，可消除拼接多個導光區域21〇 · (可視為多個小面積的導光板）時 '在導光板2〇〇、2〇2 的相鄰兩個導光區域21()之間產生的紐。 絲上所述’本發明的導光板、背光模組以及光線傳導 方法至少具有以下優點： 、在導光板设置條狀凸起物’且條狀凸起物的延伸方向 與光線的傳輸方向平行。所以，光線可在條狀凸起物中傳 10 201131220 uuWv；33irW(I) 33169twf.doc/n 輸，而能夠在導光板内形成均勻的能量分布。如此一來， 可消除拼接多個導光板的拼接處的鶴亮線。還可依照需 求而採用適g的光學设計，在條狀凸起物上再設置光學散 射圖案；或者’可改變條狀凸起物的間距、高度等，以^ f所需要的面光源分布。另外，使用上述導光i的背光^ 、、且以及光線傳導方法可提供均勻的面光源。 雖然本發明已以實施例揭露如上，然其並非用以限定 考X月任何所屬技術領域中具有通常知識者，在不脫離 發明之精神和範_，t可作些許之更動與潤飾，故本 X月之保魏®當視後附之巾請專利範圍所界定者為準。 【圖式簡單說明】 固為‘知的拼接式導光板的俯視示意圖、以及沿著 入方向的面光源的能量示意圖。 圖2為本發明較佳實施例的一種導光板的示意圖。 ，3A與圖3B為本發明較佳實施例的兩種導光板的拼 擇方式的側面示意圖。 j 4為本發日月較佳實施例的導光板的俯視示意圖、以 及〉。者X方向的面光源的能量示意圖。 Γ^ι ( * -. Θ 〜圖5C為本發明較佳實施例的三種條狀凸起物 的剖面形狀的示意圖。 刃 ®6為本發明較佳實施例的又一種導光板的示意圖。 ® 7A〜目7C為本發明較佳實施綱三種條狀凸起物 的連接方式的示意圖。 11 5 201131220 GLT09033TW(I) 33169twf.doc/n 圖8A〜圖8C為本發明較佳實施例的三種條狀凸起物 的高度變化方式的示意圖。 圖9為本發明較佳實施例的一種背光模組的示意圖。 【主要元件符號說明】 100、200、202、310 :導光板 200a :上表面 200b :下表面 210 :導光區域 212 :第一邊 214 :第二邊 220 :條狀凸起物 230 :溝槽 240 :光散射圖案 300 :背光模組 B :亮線 C :切斷面 dl、d2、d3 :間距 FL :面光源 G :拼接處 Μ、h2、h3 :高度 L :光線 S :光源 12‘scattering effect, shell degree; and the position close to the light source s can get a lower first shot effect, so as to avoid the cut light L 2 2 2 will get a more uniform surface light source. (4) And. Similarly, in order to obtain the required optical design requirements of the surface light source to adjust the connection manner of the strip-like protrusions t is two, which may be far away from each other, and a plurality of strip-like protrusions 220 may also be continuation. ;: Join; a plurality of strip-shaped protrusions 22. The spacing is Μ. Please refer to FIG. 7 and the slab-like protrusions 220 are unequally connected, wherein the strip-shaped protrusions 220 can also be Π, d2, d3. Fig. 8A to Fig. 8C are schematic diagrams showing the height variation of the age of the invention. In the figure, the two kinds of strip-like protrusions (10) are in the form of continuous continuation, in the case of H8c. For the connection method of the strip-like protrusions _ or the strip-like protrusions, please refer to Figure 8A's multiple strips to start this phase 4', that is, the 'height' is 1. Please refer to 2: 201131220 GLT09033TW(I) 33169twf.doc/n The height of the protrusions 220 may also be a regular change, wherein the heights hi, h2, h3 of the strip-shaped protrusions 220 may be, for example, linearly changed. Referring again to FIG. 8C, a plurality of strip-shaped protrusions The height of the object 220 may also be irregularly changed, wherein the heights hi, h2, and h3 of the strip-shaped protrusions 220 may be arbitrarily changed. Figure 9 is a schematic view of a backlight module according to a preferred embodiment of the present invention. 9 。 The backlight module 300 includes: a light guide plate 310 and a light source S. The light guide plate 310 can use the above-mentioned light guide plate 200 or light guide plate 202. About the light guide plate 2 The details of the 00 or the light guide plate 202 will not be repeated here. In addition, the light source S can be a light-emitting diode. Thus, the backlight module 3〇〇φ can be eliminated even if the spliced light guide plate 31 is used. The bright line generated by the g is spliced to provide a uniform surface light source FL. In addition, the present invention also proposes a light-conducting method. In an embodiment, the light-conducting method uses the above-mentioned light guide plate 2 or 2〇2 The details of the light guide plates 200, 202 will not be repeated here. This light transmission method is characterized in that the extension along the second side 214 of the light guide plate 200 is white on the upper surface 2a of the light guide plate 200. A plurality of strip-like protrusions 22'' are disposed on at least one of the lower surfaces 2'b to enable the light L to be transmitted in the strip-like protrusions 220. Thus, the plurality of light-guiding areas 21 can be eliminated. 〇· (can be regarded as a plurality of small-area light guide plates) when the 'light guide plates 21 〇〇, 2 〇 2 between the two adjacent light guide regions 21 () are generated. The light guide plate, the backlight module, and the light transmission method have at least the following advantages: The strip-shaped protrusions are arranged on the light guide plate and the extending direction of the strip-like protrusions is parallel to the direction of light transmission. Therefore, the light can be transmitted in the strip-like protrusions 10 201131220 uuWv; 33irW(I) 33169twf.doc /n can be used to form a uniform energy distribution in the light guide plate. This eliminates the glazing of the splicing of multiple light guide plates. It can also be used according to the needs of the optical design. An optical scattering pattern is further disposed on the protrusions; or 'the pitch, height, etc. of the strip protrusions may be changed to distribute the surface light source required by the surface. In addition, the backlight using the above-described light guiding i, and the light conducting method can provide a uniform surface light source. Although the present invention has been disclosed in the above embodiments by way of example, it is not intended to limit the ordinary knowledge in the technical field of the present invention. Without departing from the spirit and scope of the invention, t can be modified and retouched. The monthly warranty of Wei Wei® is to be determined by the scope of the patent. [Simple description of the drawing] A schematic view of the spliced light guide plate and a schematic diagram of the energy of the surface light source along the in-direction. 2 is a schematic view of a light guide plate according to a preferred embodiment of the present invention. 3A and 3B are side views showing the manner in which the two light guide plates are combined in accordance with a preferred embodiment of the present invention. J 4 is a schematic plan view and a view of the light guide plate of the preferred embodiment of the present invention. Schematic diagram of the energy of the surface source in the X direction. Γ^ι (* -. 〜 〜 5C is a schematic view showing the cross-sectional shape of three strip-shaped protrusions according to a preferred embodiment of the present invention. The blade® 6 is a schematic view of still another light guide plate according to a preferred embodiment of the present invention. 7A to 7C are schematic views showing the connection manner of three strip-like protrusions according to a preferred embodiment of the present invention. 11 5 201131220 GLT09033TW(I) 33169twf.doc/n FIGS. 8A to 8C are three kinds of strips according to a preferred embodiment of the present invention. FIG. 9 is a schematic diagram of a backlight module according to a preferred embodiment of the present invention. [Description of Main Components] 100, 200, 202, 310: Light guide plate 200a: upper surface 200b: Lower surface 210: light guiding region 212: first side 214: second side 220: strip protrusion 230: groove 240: light scattering pattern 300: backlight module B: bright line C: cut surface dl, d2 , d3 : spacing FL: surface light source G: splicing position h, h2, h3: height L: light S: light source 12