1280426 九、發明說明： 【發明所屬之技術頜城】 — 本發明係關於一種導光板及採用該導光板之背光模 組，特別係關於一種具網點分佈之導光板及使用該導光板 的背光模組。 【先前技術】 由於液晶顯示器面板中之液晶本身不具發光特性’因 而，為達到顯示效果，須給液晶顯示器面板提供一面光源 裝置，如背光模組，其功能在於向液晶顯示器面板供應輝 度充分且分佈均勻之面光源。 習知背光模組主要由光源、導光板、反射板、擴散板 及稜鏡板組成。其中，該光源可設置於導光板一侧或二相 對側並將光線發射至該導光板。該導光板之作用在於引導 光線傳輸方向，使光線由導光板之光出射面均勻出射。因 光源發出之光線自導光板侧面進入，故導光板靠近光源之 部份發光較亮，而遠離光源之部份發光較暗，因此，為增 加‘光板的出光效率及均勻度，通常在導光板之一面設置 v形槽或配置光擴散網點。當光線傳輸至v形槽或光擴散 、、罔點時，光線將發生反射及散射，並向各個不同方向傳輸， 隶〜由V光板之光出射面射出。利用各種疏密、大小不同 之v形槽或光擴散網點，可使導光板發光均勻。 一種具網點分佈之習知技術背光模組如第一圖與第二 圖所不’其揭露於1994年n $ 8日公告之美國專利第 5,363,294號。該專利揭示之背光模組包括—導光板22、〆 1280426 線光源21、一擴散板27及一反射板25、29。該導光板22-包括一光入射面223、一光出射面221、一端面224、二侧· 面225及一底面222 ’該線光源21設置於該導光板22光 入射面223 —側，該反射板29設置於該端面224 —侧，該 擴散板27係相對該光出射面221設置’該反射板25係相 對該底面222設置。其中’為有效利用線光源21所發出之 光線，其亦設置/反射燈罩28環繞該線光源21。該導光 板22底面222設置複數呈行列狀排佈之網點26。 請參閱第二圖，其係該網點26於該導光板22底面222 之分佈示意圖。該網點26沿與線光源21軸向平行之方向 形成複數列，且每一列中網點26之大小相同。該網點26 沿與線光源21軸向垂直之方向形成複數行’且每一行中網 點26之大小不同，其中，靠近線光源21之網點26最小， 隨著與線光源21之間距離之增大，該網點26呈線性關係 逐漸變大。由於線光源21所發出光線之強度隨著傳輸距離 之增加而降低，加之導光板22遠離線光源21之端面224 貼有反射板29(如第一圖所示），該反射板29對投射於其上 光線之反射，造成該導光板22内光線強度並非於遠離線光 源21之端面224達到最小，其最小光線強度所處位置係介 於光入射面223與端面224之間且靠近該端面224。該網 點26之尺寸即於該導光板22内光線強度最小處達到最 大，並隨之以恆定大小分佈至該導光板22遠離線光源21 之端面224。 該美國專利第5,363,294號所揭露之技術可基本解決 1280426 9 1 μ線光源21之部份發光較亮，而遠離線光源· 21之雜發光較暗之技術問題，然，由於該導光板2 面224設置有反射板29，其將入射其上之光線反射回導光 板22内導致該導光板22端面—附近的實際光線強度 並非怪定大小分佈，而是最靠近端面224處光線強度較稍 遠離&面224 伤大’此為邊界反射效應，故該網點％於 端面224附近之恆定大小分佈不能使該導光板22出光均 勻。同樣，導光板22側面225附近亦存在邊界反射效應， 列向排列之網點26之怪定大小分佈亦不能使該導光板22 出光均勻。 另，由於線光源21發出之光線在導光板22内傳輸過 程中，通常在導光板22光出射面221與底面222之間多次 反射，其在導光板22内自線光源21至端面224附近部份 之實際光線強度並非線性關係變化，且，由於線光源21具 一定長度，導光板22靠近線光源21中心之部份接受的光 線較靠近線光源21二端之部份多，又，線光源21二端靠 近電極之部份亮度比中間低，導致導光板22靠近線光源 21二端之部份發光亮度不及靠近線光源21中心之部份發 光亮度，因此，該網點26於該導光板22底面分佈仍難以 實現整個導光板22出光度之完全均勻一致。 同樣，應用上述配合線光源21之導光板22的背光模 組亦無法實現均勻發光。 因是，改進導光板之網點分佈，提高整個背光模組之 出光輝度及均勻度之設計實為必需。 1280426 【發明内容】 本發明之目 之導光板。 的在於提供一種具較高均勻度配合綠光源 本發明之目的還在於提供 導光板之背光模組。 一種具較高均勻度採用 上述 本=導$包括一第一表面、一與該第一表面相對 弟了表面、稷數邊侧面及複數擴散單元。其中，該第二 表面係光出射面，魏數擴散單元龍於該第—表面，: 複數邊侧面至少-個為光人射面，而其他邊侧面則為光^ 射侧面。各擴散單元於該第—表面之投影面積，與其與該 複數邊側面内或外<至少一線性座標點集合中各座標點、 及絲線性座標點集合於該光反射侧面形成之鏡像線性座 標點集合中各錢點之距離酿平方和成正比。 一本發明背光模纟且包括至少一線光源及一導光板，該導 光板包括-第-表面、—與該第—表面相對之第二表面、 複數邊侧面及複數擴散單元。其中，該線光源係相對光入 射面没置，該第二表面係光出射面，該複數擴散單元設置 於該第一表面，該複數邊侧面至少一個為光入射面，而其 他邊側面則為光反射側面。各擴散單元於該第—表面之投 影面積，與其與該複數邊侧面内或外之至少一線光源各部 份、及該線光源於該光反射側面形成之鏡像線光源各部份 之距離倒數平方和成正比。 本發明導光板之擴散單元於該導光板第 一表面之投影 面積與第二表面對應區域之光線導出強度成正比關係，恰 1280426 可實現該導光板之整體均勻出光，因而可提高採用冷陰極-螢光燈等線光源之導光板及採用該導光板之背光模組的出· 光均勻度。 【實施方式】 請一併參閱第三圖與第四圖，分別係本發明導光板第 一實施例之侧視圖與其底面之網點分佈示意圖。該導光板 32包括一光入射面323、一光出射面321、複數光反射側 面324、一底面322及分佈於底面322之光擴散網點36。 其中，該導光板32係一矩形平板，該光出射面321與底面 322係相對設置。 該導光板32係以透明材料如丙烯酸樹脂、聚碳酸g旨、 聚乙烯樹脂或玻璃等製成。該光入射面323接收來自光源 (圖未示）之光線，並將其導入該導光板32内。該光出射面 321將光線導出該導光板32。該光反射侧面324將入射其 上之光線反射回導光板32並經由該光出射面321出射，以 防止光線自該光反射侧面324出射而造成損失。光反射側 面324與底面322可貼附反射板’亦可採用反射膜直接鍍 於其上，以使於導光板32内傳輸之光線充分反射，最終經 光出射面321出射。 該網點36設置於該導光板32底面322,且向外突出。 該複數網點36用以提高該導光板32之出光均勻度，其亦 可為其他光擴散單元，如稜鏡結構等。該網點36可以印刷 或射出成型之方式製作。該網點36為圓球面體，其於導光 板32底面322之投影係圓形，當然，該網點36亦可為橢 11 1280426 圓體、多面體、圓錐體或削去尖端之錐形台等，其於底面· — 322之技衫亦相應為橢圓形或多邊形。該網點％於該底面 322上為凸形。該網點36係呈行列狀分佈於該導光板32 之底面322上，其中，沿與光入射面323平行之方向（圖中 標示為Y)以均勻間距設置複數列網點36,沿與光入射面 323垂直之方向（圖中標示為X)以均勻間距設置複數行網點 36。為進一步增強網點36對光線之作用，與光入射面323 平行且相鄰之奇數列與偶數列網點36亦可分別錯開半行 距離而呈交錯式分佈，當然，該網點36亦可以其他方式規 馨 則排列。 請參閱第五圖，係第四圖所示線性座標點集合37與其 於該導光板32光反射侧面324之鏡像線性座標點集合37， 示意圖。由於該光反射侧面324係鏡面，故該線性座標點 集合37以二個光反射侧面324為鏡面而於導光板32外部 形成二個鏡像線性座標點集合37’。網點36於該底面322 之投影面積與該光入射面323外之一線性座標點集合37中 各座標點有關，還與該線性座標點集合37中各座標點於該 籲 光反射側面324之鏡像座標點集合37,有關，其具體關係 為·該網點36於該底面322之投影面積，與其與該複數光 反射侧面324外之一線性座標點集合37中各座標點、及該 線性座k點集合37於該光反射侧面324形成之鏡像線性座 標點’集合37中各座標點之距離倒數平方和成正比。各網 點36之半徑大小R滿足公式：1280426 IX. Description of the Invention: [Technology of the Invention] The present invention relates to a light guide plate and a backlight module using the same, and more particularly to a light guide plate having a dot distribution and a backlight mold using the same group. [Prior Art] Since the liquid crystal in the liquid crystal display panel itself has no light-emitting characteristics, in order to achieve the display effect, the liquid crystal display panel must be provided with a light source device, such as a backlight module, whose function is to supply the liquid crystal display panel with sufficient brightness and distribution. Even surface light source. The conventional backlight module is mainly composed of a light source, a light guide plate, a reflection plate, a diffusion plate and a seesaw. Wherein, the light source can be disposed on one side or two opposite sides of the light guide plate and emit light to the light guide plate. The function of the light guide plate is to guide the light transmission direction so that the light is uniformly emitted from the light exit surface of the light guide plate. Since the light emitted by the light source enters from the side of the light guide plate, the portion of the light guide plate that is close to the light source emits light, and the portion that is far away from the light source emits light. Therefore, in order to increase the light output efficiency and uniformity of the light plate, usually in the light guide plate One side is provided with a v-shaped groove or a light diffusion dot is arranged. When the light is transmitted to the v-shaped groove or the light is diffused or smeared, the light will be reflected and scattered, and transmitted to the different directions, and the light is emitted from the light exit surface of the V-plate. The light guide plate can be uniformly illuminated by using various v-shaped grooves or light diffusion dots of different sizes and sizes. A conventional backlight module having a dot distribution, as shown in the first and second figures, is disclosed in U.S. Patent No. 5,363,294, issued on Dec. 8, 1994. The backlight module disclosed in the patent includes a light guide plate 22, a 〆 1280426 line light source 21, a diffusion plate 27 and a reflection plate 25, 29. The light guide plate 22 includes a light incident surface 223, a light exit surface 221, an end surface 224, two side surfaces 225, and a bottom surface 222. The line light source 21 is disposed on the light incident surface 223 side of the light guide plate 22. The reflection plate 29 is disposed on the side of the end surface 224, and the diffusion plate 27 is disposed opposite to the light exit surface 221. The reflection plate 25 is disposed opposite to the bottom surface 222. In order to effectively utilize the light emitted by the line source 21, it also sets/reflects the lamp cover 28 around the line source 21. The bottom surface 222 of the light guide plate 22 is provided with a plurality of dots 26 arranged in a matrix. Please refer to the second figure, which is a schematic diagram of the distribution of the dots 26 on the bottom surface 222 of the light guide plate 22. The dots 26 form a plurality of columns in a direction parallel to the axial direction of the line source 21, and the dots 26 of each column have the same size. The dot 26 forms a plurality of rows ' in a direction perpendicular to the axial direction of the line source 21 and the size of the dots 26 in each row is different, wherein the dot 26 adjacent to the line source 21 is the smallest, and the distance from the line source 21 increases. The dot 26 gradually becomes larger in a linear relationship. Since the intensity of the light emitted by the line source 21 decreases as the transmission distance increases, the end surface 224 of the light guide plate 22 away from the line source 21 is attached with a reflecting plate 29 (as shown in the first figure), and the pair of reflecting plates 29 are projected on The reflection of the light thereon causes the intensity of the light in the light guide plate 22 to be minimized from the end surface 224 of the line source 21, and the minimum light intensity is located between the light incident surface 223 and the end surface 224 and close to the end surface 224. . The size of the dot 26 is maximized at a minimum intensity of light in the light guide plate 22, and is then distributed to a constant size to the end face 224 of the light guide plate 22 away from the line source 21. The technique disclosed in the U.S. Patent No. 5,363,294 can basically solve the technical problem that a part of the light of the 1280426 9 1 μ line source 21 is brighter and the light of the line light source 21 is darker, however, since the light guide plate 2 faces The 224 is provided with a reflector 29, which reflects the light incident thereon back into the light guide plate 22, so that the actual light intensity near the end surface of the light guide plate 22 is not a strange size distribution, but the light intensity closest to the end surface 224 is relatively far away. & face 224 injury large 'this is the boundary reflection effect, so the constant size distribution of the mesh point % near the end face 224 can not make the light guide plate 22 uniform light. Similarly, there is also a boundary reflection effect near the side 225 of the light guide plate 22. The strange size distribution of the dots 26 arranged in the column direction cannot make the light guide plate 22 emit light uniformly. In addition, since the light emitted by the line source 21 is transmitted in the light guide plate 22, it is usually reflected multiple times between the light exit surface 221 and the bottom surface 222 of the light guide plate 22, and is in the light guide plate 22 from the line source 21 to the end surface 224. The actual light intensity changes in a non-linear relationship, and since the line source 21 has a certain length, the portion of the light guide plate 22 near the center of the line source 21 receives more light than the two ends of the line source 21, and the line The brightness of the portion of the light source 21 near the electrode is lower than that of the middle portion, so that the portion of the light guide plate 22 near the two ends of the line source 21 is less bright than the portion near the center of the line source 21. Therefore, the dot 26 is on the light guide plate. 22 The bottom surface distribution is still difficult to achieve complete uniformity of the light output of the entire light guide plate 22. Similarly, the backlight module to which the light guide plate 22 of the line source 21 is applied is also unable to achieve uniform illumination. Therefore, it is necessary to improve the distribution of the dots of the light guide plate and improve the brightness and uniformity of the entire backlight module. 1280426 SUMMARY OF THE INVENTION A light guide plate for the purpose of the present invention. It is to provide a green light source with a high degree of uniformity. The object of the present invention is also to provide a backlight module for a light guide plate. A higher uniformity using the above-mentioned present guide includes a first surface, a surface opposite to the first surface, a side of the number of sides, and a plurality of diffusion units. Wherein, the second surface is a light exit surface, the Wei number diffusion unit is on the first surface, and at least one side of the plurality of sides is a light human surface, and the other side surfaces are light side surfaces. a projected linear area formed by the diffusing unit on the first surface, and a plurality of coordinate points in the set of at least one linear coordinate point, and a linear coordinate point on the light reflecting side of the diffusing unit The distance between the money points in the point set is proportional to the sum of the squares. A backlight module of the invention includes at least one line source and a light guide plate, the light guide plate including a - surface, a second surface opposite the first surface, a plurality of side surfaces, and a plurality of diffusion units. Wherein, the line light source is not disposed opposite to the light incident surface, the second surface is a light exit surface, the plurality of diffusion units are disposed on the first surface, and at least one of the plurality of side surfaces is a light incident surface, and the other side surfaces are Light reflection side. The inverse of the distance between the projection area of each diffusion unit on the first surface, the portion of at least one of the line sources in the side of the plurality of sides, and the portions of the line source formed by the line source on the light reflection side And directly proportional. The projection area of the diffusion unit of the light guide plate of the present invention is proportional to the light-emission intensity of the first surface of the light guide plate, and the uniform light output of the light guide plate can be realized by 1280426, thereby improving the use of the cold cathode- Light-emitting uniformity of a light guide plate of a line source such as a fluorescent lamp and a backlight module using the light guide plate. [Embodiment] Please refer to the third and fourth figures, respectively, which are schematic diagrams showing the distribution of the dot points of the side view and the bottom surface of the first embodiment of the light guide plate of the present invention. The light guide plate 32 includes a light incident surface 323, a light exit surface 321, a plurality of light reflecting side surfaces 324, a bottom surface 322, and a light diffusion dot 36 disposed on the bottom surface 322. The light guide plate 32 is a rectangular flat plate, and the light exit surface 321 is opposite to the bottom surface 322. The light guide plate 32 is made of a transparent material such as an acrylic resin, a polycarbonate, a polyethylene resin, or glass. The light incident surface 323 receives light from a light source (not shown) and introduces it into the light guide plate 32. The light exit surface 321 directs light to the light guide plate 32. The light reflecting side surface 324 reflects the light incident thereon back to the light guide plate 32 and exits through the light exit surface 321 to prevent light from being emitted from the light reflecting side surface 324 to cause loss. The light reflecting side surface 324 and the bottom surface 322 may be attached to the reflecting plate ′. The reflecting film may be directly plated thereon so that the light transmitted through the light guiding plate 32 is sufficiently reflected and finally emitted through the light emitting surface 321 . The dot 36 is disposed on the bottom surface 322 of the light guide plate 32 and protrudes outward. The plurality of dots 36 are used to increase the light uniformity of the light guide plate 32, and may also be other light diffusing units, such as a crucible structure. The dot 36 can be made by printing or injection molding. The dot 36 is a spherical body, and the projection of the bottom surface 322 of the light guide plate 32 is circular. Of course, the dot 36 can also be an ellipse 11 1280426 round body, a polyhedron, a cone or a tapered tipped table, etc. The bottom of the shirt is also oval or polygonal. The dot % is convex on the bottom surface 322. The dots 36 are arranged in a matrix on the bottom surface 322 of the light guide plate 32. The plurality of rows of dots 36 are arranged at a uniform pitch along a direction parallel to the light incident surface 323 (indicated as Y in the figure), along the light incident surface. The vertical direction of the 323 (labeled X in the figure) sets the plurality of rows of dots 36 at even intervals. In order to further enhance the effect of the dots 36 on the light, the odd-numbered columns and the even-numbered-column dots 36 which are parallel to the light-incident surface 323 may be staggered by a half-line distance, and of course, the dot 36 may be in other manners. Xin is arranged. Please refer to the fifth figure, which is a schematic diagram of a set of linear coordinate points 37 of the linear coordinate point set 37 and the light reflecting side 324 of the light guide plate 32 shown in the fourth figure. Since the light reflecting side surface 324 is a mirror surface, the linear coordinate point set 37 forms two mirrored linear coordinate point sets 37' outside the light guide plate 32 with the two light reflecting side surfaces 324 as mirror surfaces. The projected area of the dot 36 on the bottom surface 322 is related to each coordinate point in the linear coordinate point set 37 outside the light incident surface 323, and the mirror image of the coordinate point 39 in the linear coordinate point set 37 is mirrored on the light-reflecting side 324. a set of coordinate points 37, the specific relationship of which is the projected area of the half point 36 on the bottom surface 322, and the coordinate points of the linear coordinate point set 37 outside the complex light reflecting side surface 324, and the linear point k The set 37 is proportional to the sum of the squares of the reciprocal distances of the respective coordinate points in the mirrored linear coordinate point 'set 37 formed by the light reflecting side 324. The radius R of each mesh point 36 satisfies the formula:
R = rQ +k^A + B 12 1280426 其中： W-W Μ T 2 ΚΖ c〇s〜+ 〜))3 + (F 一万sin ^ B (^- (Icosffj + xsfj))2 + (7-(1 sin5?y + ysjfdl (X，Y)、（xs;·，ys》與(xs/φ ys/y)屬於一直角座標系，（χ，γ) 係網點36之座標，（xS/，yS/)係對應線性座標點集合37起始 端之座標，（xsA;·，ysA;·)係對應線性座標點集合37於該光反射 侧面324形成之鏡像線性座標點集合37，起始端之座標， (/c〇S<9y+XSj，/WwA+ysy)係對應線性座標點集合37中各座標 點於该直角座標系中之座標，（/cos〜+xs~，以义〜+丫％)係 對應線性座標點集合37於該光反射侧面324形成之鏡像線性座 標點集合37中各座標點於該直角座標系中之座標，w為導光板犯 全部光入射面323與光反射侧面324數目之總和，m係光入射面 323之數目’則光反射側面324之數目為：w—m，假設每-光入射 面323僅有-線性座標點集合37，對於本實施例，m為iw為4， 故光反射側面324之數目為3，•係對應線性座標點集合37的長籲 度^係對應座標點集合37與χ座標轴之交角，〜係對應線性 座標點集合37於該光反射側面犯4形成之鏡像線性座標點集合 37’與Χ座標軸之交角，/4對應光反射侧面324之反射率，j為 自然數h為整數’〜與k為常數，對應於不同結構與尺寸之導光 板32 ’不同的線性座標點集合37與位置有不同的让值及❹值。 本發明之導光板32用於背光模組時，如在其底面322 ' 無設置網點36’其内光線導出強度自光入射面323至光反 13 1280426 射侧面324附近部份(c區）離光入射面323越遠越弱，光入-射面323與反射側面324之間之導光板32部份(B區）發光. 相對C區較弱，然，由於導光板32光反射側面324附近存 在邊界反射效應，該導光板32光反射侧面324附近(A區） 的實際光線強度較稍遠離該光反射側面324處(B區）強度 大，如此，當於該導光板32之底面322設置依據本發明而 分佈之網點36時，由於網點36於該底面322之投影面積 與光出射面321對應區域之光線導出強度成正比關係，恰 可實現該導光板32之整體均勻出光。 請參照第六圖，係採用本發明導光板之背光模組一實 施例之示意圖，該背光模組包括導光板32及設置於其侧面 之線光源31，如冷陰極螢光燈，該導光板32底面322設 置有反射板或反射膜（圖未示）。光線自線光源31出射，進 入導光板32後一部份光於該導光板32底面322之網點36 進行散射與反射，由底面322出射之光線由於該導光板32 底面322設置之反射板或反射膜而反射回導光板32，從而 可實現該背光模組整體均勻出光。 本發明導光板之第二實施例如第七圖與第八圖所示。 該導光板42包括二光入射面423、一光出射面421、二光 反射側面424、一底面422及底面422上之複數網點46， 其中，該導光板42係一矩形平板，該光出射面421與底面 422相對設置。該實施例與第一實施例大體相同，惟，該 第二實施例之光入射面423為二個，當然，光入射面423 亦可多於二個，該二光入射面423附近皆有線性座標點集 14 1280426 合47，其數目為2 ,當然，亦可係其他數值，且，該網點 46於該底面422投影面積排佈取決於該線性座標點集合47 與其數目、及其中各座標點與該網點46之距離，還取決於1 該光反射侧面424及其數目。 本實施例之導光板42用於背光模組時，如在其底面 422無设置網點46，其内光線導出強度自光入射面423至 光反射侧面424附近部份離光入射面423越遠越弱，光入 射面423與光反射侧面424之間之導光板42部份發光相對 較弱，然，由於導光板42光反射侧面424附近存在邊界反 射效應’該導光板42光反射侧面424附近的實際光線強度 較稍遠離該光反射側面424處強度大，如此，當於該導光 板42之底面422設置依據本發明分佈之網點46時，由於 網點46於該底面422之投影面積與光出射面421對應區域 之光線導出強度成正比關係，恰可實現該導光板42整體均 勻出光。 請參閱第九圖，係本發明導光板第三實施例之侧視 圖，該導光板52包括一光入射面523、一光出射面521、 光反射侧面524、一底面522及底面522上之網點56。其 中，該導光板52係一楔形板，該光出射面521與底面522 相對設置，該網點56於該底面522之投影面積分佈與本發 明第一實施例相似。 當然，本發明導光板還可以係其他形狀如弧形板、彎 折板等，該複數網點亦可以設置於本發明導光板之光出射 面，該網點可凹進該導光板底面，該線性座標點集合亦可 15 1280426 係位於該導光板之光入射面内。 _ 如上述導光板用於背光模組時，導光板邊側面内或外· 之線性座標點集合處可放置線光源，如冷陰極螢光燈。 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例， 本發明之範圍並不以上述實施例為限，舉凡熟習本案技藝 之人士援依本發明之精神所作之等效修飾或變化， = 蓋於以下申請專利範圍内。 白應涵 【圖式簡單說明】 第一圖係習知技術背光模組之侧視圖。 第二圖係第一圖所示之導光板底面之網點分佈示意 圖。 心、 第二圖係本發明導光板第一實施例之侧視圖。 第四圖係第三圖所示導光板底面之網點分佈示意圖。 第五圖係第四圖所示線性座標點集合與其於該導光板 光反射側面之鏡像線性座標點集合示意圖。 第六圖係採用本發明導光板第一實施例之背光模組之 示意圖。 第七圖係本發明導光板第二實施例之侧視圖。 第八圖係第六圖所示導光板底面之網點分佈之示意 圖。 第九圖係本發明導光板第三實施例之側視圖。 【主要元件符號說明】 導光板 32、42、52光入射面323、423、523 16 1280426 網點 36、46、56 光出射面 321、42卜 521 底面 322、422、522 線光源 31 座標點集合 37、47 光反射侧面 324、424、524 鏡像線性座標點集合 37’ 17R = rQ + k^A + B 12 1280426 where: WW Μ T 2 ΚΖ c〇s~+ ~)) 3 + (F 10,000 sin ^ B (^- (Icosffj + xsfj)) 2 + (7-( 1 sin5?y + ysjfdl (X,Y), (xs;·,ys) and (xs/φ ys/y) belong to the coordinate system, (χ, γ) coordinates of the network point 36, (xS/, yS /) is a coordinate corresponding to the beginning of the set of linear coordinate points 37, (xsA; ·, ysA; ·) is a set of mirrored linear coordinate points 37 formed by the set of linear coordinate points 37 on the light reflecting side 324, the coordinates of the starting end, (/c〇S<9y+XSj,/WwA+ysy) is the coordinate of each coordinate point in the linear coordinate point set 37 in the rectangular coordinate system, (/cos~+xs~, meaning ~+丫%) Corresponding to the coordinates of each coordinate point of the coordinate point set 37 in the mirrored linear coordinate point set 37 formed by the linear coordinate point set 37 in the rectangular coordinate system, w is the number of all light incident surfaces 323 and light reflecting sides 324 of the light guide plate. The sum of the m-type light incident faces 323' is the number of light-reflecting sides 324: w-m, assuming that each-light incident face 323 has only a linear set of coordinate points 37. For this embodiment, m is iw 4, so light reflection The number of faces 324 is 3, the length of the corresponding coordinate set 37 is corresponding to the angle of intersection of the coordinate set 37 and the coordinate axis, and the set of corresponding linear coordinate points 37 is formed on the side of the light reflection 4 The angle of intersection of the mirrored linear coordinate point set 37' with the Χ coordinate axis, /4 corresponds to the reflectivity of the light reflecting side 324, j is the natural number h is an integer '~ and k is a constant, corresponding to the light guide plate 32' of different structure and size The linear coordinate point set 37 has different yields and values from the position. When the light guide plate 32 of the present invention is used in the backlight module, for example, the bottom surface 322 'no net point 36' is provided, and the light is emitted from the light incident surface. 323 to light reverse 13 1280426 The portion near the side 324 (c region) is weaker from the light incident surface 323, and the portion (B region) of the light guide plate 32 between the light incident-emitting surface 323 and the reflective side surface 324 is illuminated. The C area is weaker. However, due to the boundary reflection effect near the light reflecting side 324 of the light guide plate 32, the actual light intensity near the light reflecting side 324 (A area) of the light guiding plate 32 is slightly away from the light reflecting side 324 (B). Zone) is strong, so when it is on the light guide plate 3 When the bottom surface 322 of the second surface 322 is disposed in accordance with the present invention, since the projected area of the half point 36 on the bottom surface 322 is proportional to the light output intensity of the corresponding area of the light exit surface 321 , the overall uniformity of the light guide plate 32 can be achieved. Referring to the sixth embodiment, a schematic diagram of an embodiment of a backlight module using a light guide plate of the present invention includes a light guide plate 32 and a line light source 31 disposed on a side thereof, such as a cold cathode fluorescent lamp. The bottom surface 322 of the light guide plate 32 is provided with a reflection plate or a reflection film (not shown). The light is emitted from the line source 31. After entering the light guide plate 32, a portion of the light is scattered and reflected by the mesh point 36 of the bottom surface 322 of the light guide plate 32. The light emitted from the bottom surface 322 is reflected or reflected by the bottom surface 322 of the light guide plate 32. The film is reflected back to the light guide plate 32, so that the backlight module can be uniformly emitted as a whole. A second embodiment of the light guide plate of the present invention is shown in the seventh and eighth figures. The light guide plate 42 includes a light incident surface 423, a light exit surface 421, a light reflecting surface 424, a bottom surface 422, and a plurality of mesh points 46 on the bottom surface 422. The light guide plate 42 is a rectangular flat plate, and the light emitting surface is a light emitting surface. The 421 is disposed opposite to the bottom surface 422. This embodiment is substantially the same as the first embodiment. However, the light incident surface 423 of the second embodiment is two. Of course, the light incident surface 423 may be more than two, and the two light incident surfaces 423 are linear. The coordinate point set 14 1280426 is 47, the number of which is 2, of course, other values may be used, and the projected area of the mesh point 46 on the bottom surface 422 depends on the linear coordinate point set 47 and its number, and the coordinate points therein The distance from the dot 46 is also dependent on 1 the light reflecting side 424 and its number. When the light guide plate 42 of the embodiment is used in the backlight module, if no dot 46 is provided on the bottom surface 422, the intensity of the inner light is extended from the light incident surface 423 to the vicinity of the light reflecting side 424. The portion of the light guide plate 42 between the light incident surface 423 and the light reflecting side surface 424 is relatively weak. However, due to the boundary reflection effect near the light reflecting side surface 424 of the light guide plate 42, the light reflecting plate 42 is adjacent to the light reflecting side surface 424. The actual light intensity is greater than the intensity of the light-reflecting side 424. Therefore, when the mesh point 46 distributed according to the present invention is disposed on the bottom surface 422 of the light guide plate 42, the projected area and the light exit surface of the mesh point 46 on the bottom surface 422. The 421 corresponding region has a direct relationship with the light output intensity, and the light guide plate 42 can be uniformly emitted as a whole. Referring to FIG. 9 , a side view of a third embodiment of a light guide plate of the present invention includes a light incident surface 523 , a light exit surface 521 , a light reflecting side surface 524 , a bottom surface 522 , and a mesh point on the bottom surface 522 . 56. The light guide plate 52 is a wedge plate, and the light exit surface 521 is opposite to the bottom surface 522. The projected area distribution of the mesh point 56 on the bottom surface 522 is similar to that of the first embodiment of the present invention. Of course, the light guide plate of the present invention may be other shapes such as a curved plate, a bent plate, etc., and the plurality of dots may also be disposed on the light exit surface of the light guide plate of the present invention, and the dot may be recessed into the bottom surface of the light guide plate, the linear coordinate The set of points may also be 15 1280426 located in the light incident surface of the light guide plate. _ When the above-mentioned light guide plate is used for the backlight module, a line source such as a cold cathode fluorescent lamp can be placed at a set of linear coordinate points inside or outside the side of the light guide plate. In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make equivalent modifications or changes in accordance with the spirit of the present invention. Covered in the scope of the following patent application. Bai Yinghan [Simple description of the diagram] The first diagram is a side view of a conventional backlight module. The second figure is a schematic diagram of the dot distribution of the bottom surface of the light guide plate shown in the first figure. The second and second drawings are side views of the first embodiment of the light guide plate of the present invention. The fourth figure is a schematic diagram of the distribution of the dots on the bottom surface of the light guide plate shown in the third figure. The fifth figure is a schematic diagram of the set of linear coordinate points shown in the fourth figure and the mirrored linear coordinate points of the light reflecting side of the light guide plate. Fig. 6 is a schematic view showing a backlight module of the first embodiment of the light guide plate of the present invention. Figure 7 is a side view of a second embodiment of the light guide plate of the present invention. The eighth figure is a schematic view of the distribution of the dots on the bottom surface of the light guide plate shown in the sixth figure. Figure 9 is a side view of a third embodiment of the light guide plate of the present invention. [Description of main component symbols] Light guide plates 32, 42, 52 Light incident faces 323, 423, 523 16 1280426 Dots 36, 46, 56 Light exit faces 321 , 42 521 Bottom 322, 422, 522 Line source 31 Coordinate point set 37 , 47 light reflecting sides 324, 424, 524 mirrored linear coordinate point set 37' 17