1261130 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種導光板及使用該導光板之背光模組，特別 係關於一種可雙面射出光線之導光板及背光模組。 【先前技術】 隨著電子與光電產業之發展，越來越多之電子產品具有雙面 顯示功能，相應雙面發光背光模組之設計便成為液晶顯示器業者 一項非常重要之議題。目前雙面發光導光板主要通過反射片分光 與網點分光二種方式對導光板内部光線進行分配，使之由二出光 面射出，實現雙面發光。 一種先別技術背光模組之平面示意圖如第一圖所示，其揭露 於2002年7月12公告的日本專利第3, 326, 854號。該雙面發光背光 模組20包括二光聰，—反射片23，—上導光板％及—下導光板 28 ’戎上導光板24包括一第一入光面（未標示）、-相鄰之第-出 光面（未“不）及-第一底面（未標示），該第一出光面與第一底面 2對。又置，s亥下導光板28包括一第二人光面（未標示）、-相鄰之 第二出光面（未標及H面（未標示），糾二出光面與第 、底面相對4置，其中，該反射片23係雙面反射反射片，其設置 於上導光板24與下導光板28之間，肖二光源_對設置於該上導 j板24之从面與下導光板默人光面一側， 該上導光板24之第 ^出光面與訂導光板28之第二出光面均設置於該反射片23之外 1另外，该背光模組20還包括二均勻化層26及二擴散板25，其 1261130 依次设於紅導光板24之出導紐28之出絲-侧，其 作用在於擴散射出光，使其均勻化。 工作時’光線（圖未示）自光源21發出後，分爲兩部份，-部 =經第-人光面進人上導光板24，另—部份經第二人光面進入下 V光板28 4兩部份光線再分別經過對應導光板％、沈的傳導及 反射片23—側面的反射從對應出光面射出，最後經過均勻化層況 及擴散板25均光作用，實現雙面發光。 惟:該背光模遞不易將統21之光束均城合到上導光板 24與下導光板28之上’容易造成上導光板24與下導光機光輝度 不均勻的情況’此問題特則岐在導光板之邊沿處。1261130 IX. Description 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 and a backlight module capable of emitting light on both sides. [Prior Art] With the development of the electronics and optoelectronics industry, more and more electronic products have double-sided display functions, and the design of the corresponding double-sided light-emitting backlight module has become a very important issue for the liquid crystal display industry. At present, the double-sided light-emitting light guide plate mainly distributes the light inside the light guide plate by two methods of splitting the light of the reflection sheet and splitting the light points, so that the light is emitted from the two light-emitting surfaces to realize double-sided light emission. A plan view of a prior art backlight module is shown in the first figure, which is disclosed in Japanese Patent No. 3,326,854, issued on July 12, 2002. The double-sided light-emitting backlight module 20 includes two light-light, a reflective sheet 23, an upper light guide plate%, and a lower light guide plate 28'. The upper light guide plate 24 includes a first light-incident surface (not labeled), adjacent a first-light-emitting surface (not "no") and a first bottom surface (not shown), the first light-emitting surface is opposite to the first bottom surface 2. Again, the light-guide plate 28 includes a second human light surface (not Marked), adjacent to the second illuminating surface (unlabeled and H-faced (not labeled), the illuminating surface is opposite to the first and the bottom surface, wherein the reflecting sheet 23 is a double-sided reflective sheet, which is disposed on Between the upper light guide plate 24 and the lower light guide plate 28, the second light source _ is disposed on the side of the upper guide plate 24 and the lower light guide surface, and the light emitting surface of the upper light guide plate 24 is The second light-emitting surface of the light-guiding plate 28 is disposed outside the reflective sheet 23. In addition, the backlight module 20 further includes a second homogenizing layer 26 and two diffusing plates 25, and the 1261130 is sequentially disposed on the red light guiding plate 24. The wire-side of the guide button 28 functions to diffuse the emitted light to make it uniform. During operation, the light (not shown) is emitted from the light source 21, and then The two parts, the - part = enter the light guide plate 24 through the first person, and the other part enters the lower V-plate 28 through the second person's smooth surface, and then pass through the corresponding light guide plate, sinking The reflection and reflection sheet 23 - the side reflection is emitted from the corresponding light exit surface, and finally the uniformization layer condition and the diffusion plate 25 are both light-acting to realize double-sided illumination. However, the backlight molding is not easy to integrate the beam of the system 21 to Above the upper light guide plate 24 and the lower light guide plate 28, it is easy to cause the brightness of the upper light guide plate 24 and the lower light guide to be uneven. This problem is particularly at the edge of the light guide plate.
有鑑於此，提供-種輝度均勻之雙面發光導光板及背光模組 本發明之目的在於提供-種輝度均勻之可雙面㈣光線之導In view of the above, a double-sided light-emitting light guide plate and a backlight module with uniform brightness are provided. The object of the present invention is to provide a double-sided (four) light guide with uniform brightness.
輝度均勻之雙面發光之背光Brightness uniform double-sided illumination backlight
其包括··一上板及 ，一與該入光面相 鄰之出光面，一與該出光面相對之底面， 一入先面，一與該入光面相鄰之出光面， 及一側面；該下板包括 一與該出光面相對之底 1261130 面’及-側面’該下板之底面與該上板之底面相貼合設置，該上 板之側面與該下板之側©在工作巾可分職射人财上之光線反 射入下板與上板。 對應於上述目的’本發明還提供—種背光模组，其包括一導 光板，-光源，-反射片’及二擴散板，該導光板包括：一上板 及-與該上板結合之下板，該上板包括_人光面，—與該入光面 相鄰之出光© 與該出光面相對之底面，及—側面；該下板包 括-入光面’ -與該人絲相鄰之出絲，—與該出光面相對之 底面，及’©，該下板之底面與該上板之底面她合設置，該 上板之側面與該下板之側面在工作中可分別將射入到其上之光線 反射入下板與上板。該反則位于該上板與該下板之間該光源 位于遠導光板人光面-側，該二擴散板位于該導光板域面一側。 相較於先前技術’在本發明導光板及背光模組巾，將上板與 下板邊沿的結構相結合使入射光源可以在上下板中傳輸，上板之 側面與下板之側面在X作巾可分聰人㈣其上之光線反射入下 板與上板’增加了上下板之間_合效應，使導光板出光面的輝 度均勻性得到提高。 【實施方式】 凊一倂參閱第二圖與第三圖，係本發明導光板第一實施方式 的立體示意圖及平面示意圖。該導光板40包括一上板44及一與 該上板44結合之下板48。 1261130 該上板44包括-入光面441，—與該入光面44i相鄰之出光 面44卜與該出光面442相對之底面撕，及二側面❿該底 面444祕祕放置反射# (圖未示）之凹陷區445，該側面443 塗有反光性材料（圖未示）’其相對於該出光面桃形成一鈍角， 相對於該底面444形成一銳角。 該下板48包括一入光面48卜_與該入光面似相鄰之出光 面482 ’ -與該出光面衡目對之底面概，及二側面娜，該侧 面483塗有反光性材料（圖未示），其相對於該出光面 482形成一 鈍角，相對於該底面484形成一銳角。 該導光板40之上板44與下板48由導光性材質如聚酯 (Polyester, ΡΕΤ)，聚碳酸酯（p〇iyCarb〇na1：e，pc)，聚甲基丙烯 酸甲醋（Polymethyl Methacrylate，PMMA)等經射出成型方法製 成’當然也可使用其他方法製造。組裝時，該下板48之底面484 與該上板44之底面444相貼合設置，該二底面444、484的接觸 面（未標示）可以通過透光性的糌膠膠合在一起。 請一倂參閱第四圖與第五圖，係本發明導光板第二實施方式 的立體示意圖及平面示意圖。該導光板60與第一實施方式之導光 板40結構基本相同，其不同之處在於該導光板60之上板64及下 板68的側面643及683之形狀。該側面643、683呈弧形。 請一倂參閱第六圖與第七圖，係本發明導光板第三實施方式 的立體示意圖及平面示意圖。該導光板80與第一實施方式之導光 1261130 板40結構基本相同，其不同之處在於該導光板8〇上板似的側面 843之形狀。該側面843包括一斜面8431及一竪直面8432。 5月參閲第八圖係本發明背光模組第一實施方式的立體示意 圖，该背光模組100包括一導光板80、二擴散板125、一雙面反 射反射片90及一光源（圖未示）。該導光板8〇具體結構如第六圖 與第七圖所示。該背光模組1〇〇組裝時，該反射片9〇置於該導光 板80之凹陷區845内，以透光性糌膠把上板84及下板88之底面 844、884的接觸面（未標示）膠合在一起，再把該二擴散板分 別置於上板84及下板88之出光面842、882外側，把光源置於上 板84及下板88之入光面841、881 —側。 該背光模組100工作時，光源發出光線分別進入上板84及下 板88，光線在上板84或下板88内傳輸時，部份光線如光線y 的傳輸規律與先前技術如第一圖所示背光模組20内光線（圖未示） 的傳輸規律是一樣的，光線L1傳到下板88之底面884時，被與 底面88相鄰的反射片90反射回來，再經下板88之出光面882射 向擴散板125 ;部份光線如光線L2傳輸到下板88側面883，由於 側面883皇有反光性材料（圖未示），光線u被反射進入上板％， 後傳輸到側面843之斜面8431，由於側面8431亦塗有反光性材料 (圖未不）’光線L2被斜面8431反射到上板84出光面842，再經 擴散板125射出。 本發明導光板40、60、80及背光模組100中，將上板與下板 1261130 邊沿的結構相結合使射入光源可以在上下板中傳輸，上板之側面 與下板之側面在工作中可分別將入射到其上之光線反射入下板與 上板’增加了上下板之間_合效應，使導光板出光面的輝度均 勻性得到提高。 當然，本發明之導光板及背光模組結構不限於上述幾種形 式例如，導光板上板及下板之底面可以設置複數個網點；上板 及下板之侧面塗有的反紐材料亦可狀射#代替；放置反射片 之凹陷區445、845亦可形成於下板底面；上板及下板之側面形狀 亦不僅限於上述實施方式，其側面形狀設計只要滿足上板之側面 與下板之側面在工作中可分別將人射到其上之絲反射入下板與 上板即可。 紅上所述，本發明確已符合發明專利之要件，爰依法提出專 辦請。上所述者僅為本發明之較佳實施方式，本發明之 觀圍亚;^上述實施方式為限，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，皆應涵蓋於以下中請專利範 圍内。 【圖式簡單說明】 第一圖係—種先前技術背光触之平面示意圖。 f二圖係本發明導歧第-實施方式的立體示意圖 第三圖係第二圖所示導光板之平面示意圖。 1261130 第四圖係本發明導光板第二實施方式的立體示意圖。 第五圖係第四圖所示導光板之平面示意圖。 第六圖係本發明導光板第三實施方式的立體示意圖。 第七圖係第六圖所示導光板之平面示意圖。 第八圖係本發明背光模組的立體示意圖。 【主要元件符號說明】 導光板 40、60、80 上板 44、64、84 下板 48、68、88 入光面 441 > 481 > 84卜 881 出光面 442、482、842、882 底面 444 、 484 、 844 、 884 側面 443、643、683、 483、843、883 凹陷區 445 、 845 斜面 8431 竪直面 8432 擴散板 125 反射片 90 背光模組 100The utility model comprises an upper plate and a light emitting surface adjacent to the light incident surface, a bottom surface opposite to the light emitting surface, a front surface, a light emitting surface adjacent to the light incident surface, and a side surface The lower plate includes a bottom portion 1261130 opposite to the light-emitting surface and a side surface of the lower plate is disposed in conformity with a bottom surface of the upper plate, and the side of the upper plate and the side of the lower plate are at work The towel can be split into the lower board and the upper board. Corresponding to the above purpose, the present invention further provides a backlight module including a light guide plate, a light source, a reflection sheet and a two diffusion plate, the light guide plate comprising: an upper plate and a combination with the upper plate a plate comprising: a human light surface, an exit light adjacent to the light incident surface © a bottom surface opposite the light exit surface, and a side surface; the lower plate includes a light incident surface - adjacent to the human filament The wire, the bottom surface opposite to the light emitting surface, and '©, the bottom surface of the lower plate and the bottom surface of the upper plate are disposed together, and the side surface of the upper plate and the side surface of the lower plate can be separately shot during operation The light that enters it is reflected into the lower and upper plates. The light source is located between the upper plate and the lower plate. The light source is located on the side of the light guide surface of the remote light guide plate, and the two diffusion plates are located on the side of the light guide plate. Compared with the prior art, in the light guide plate and the backlight module towel of the present invention, the structure of the upper plate and the lower plate edge is combined, so that the incident light source can be transmitted in the upper and lower plates, and the side faces of the upper plate and the side of the lower plate are made in X. The towel can be divided into Congren (4) The light on it is reflected into the lower plate and the upper plate', and the effect between the upper and lower plates is increased, so that the brightness uniformity of the light-emitting surface of the light guide plate is improved. [Embodiment] Referring to the second and third figures, a perspective view and a plan view of a first embodiment of a light guide plate of the present invention are shown. The light guide plate 40 includes an upper plate 44 and a lower plate 48 joined to the upper plate 44. 1261130 The upper plate 44 includes a light-incident surface 441, a light-emitting surface 44 adjacent to the light-incident surface 44i, and a bottom surface opposite to the light-emitting surface 442, and two side surfaces 444 the bottom surface 444 secretly placed reflection # ( A recessed area 445, not shown, is coated with a light-reflecting material (not shown) which forms an obtuse angle with respect to the light-emitting surface peach and forms an acute angle with respect to the bottom surface 444. The lower plate 48 includes a light-incident surface 48, a light-emitting surface 482 ′ adjacent to the light-incident surface, and a bottom surface of the light-emitting surface, and a side surface, which is coated with a reflective material. (not shown), which forms an obtuse angle with respect to the light exiting surface 482, forming an acute angle with respect to the bottom surface 484. The upper plate 44 and the lower plate 48 of the light guide plate 40 are made of a light guiding material such as polyester (Polyester, 聚碳酸酯), polycarbonate (p〇iyCarb〇na1:e, pc), polymethyl methacrylate (Polymethyl Methacrylate). , PMMA) and the like are produced by injection molding method. Of course, other methods can also be used. When assembled, the bottom surface 484 of the lower plate 48 is disposed in close contact with the bottom surface 444 of the upper plate 44. The contact surfaces (not labeled) of the two bottom surfaces 444, 484 can be glued together by translucent silicone. Referring to the fourth and fifth figures, a perspective view and a plan view of a second embodiment of the light guide plate of the present invention are shown. The light guide plate 60 has substantially the same structure as the light guide plate 40 of the first embodiment, and is different in the shape of the side faces 643 and 683 of the upper plate 64 and the lower plate 68 of the light guide plate 60. The sides 643, 683 are curved. Referring to the sixth and seventh figures, a perspective view and a plan view of a third embodiment of the light guide plate of the present invention are shown. The light guide plate 80 has substantially the same structure as the light guide 1261130 plate 40 of the first embodiment, except that the light guide plate 8 has a shape similar to the side 843 of the plate. The side 843 includes a slope 8441 and a vertical surface 8432. FIG. 8 is a perspective view of a first embodiment of a backlight module of the present invention. The backlight module 100 includes a light guide plate 80, two diffusion plates 125, a double-sided reflective sheet 90, and a light source. Show). The specific structure of the light guide plate 8 is as shown in the sixth and seventh figures. When the backlight module 1 is assembled, the reflective sheet 9 is placed in the recessed area 845 of the light guide plate 80, and the contact faces of the bottom surfaces 844 and 884 of the upper plate 84 and the lower plate 88 are made of translucent silicone. The two diffusing plates are respectively placed on the outer sides of the light emitting surfaces 842 and 882 of the upper plate 84 and the lower plate 88, and the light source is placed on the light incident surfaces 841 and 881 of the upper plate 84 and the lower plate 88. side. When the backlight module 100 is in operation, the light source emits light into the upper plate 84 and the lower plate 88 respectively. When the light is transmitted in the upper plate 84 or the lower plate 88, the transmission law of part of the light such as the light y is as shown in the first figure. The transmission law of the light (not shown) in the backlight module 20 is the same. When the light L1 is transmitted to the bottom surface 884 of the lower plate 88, it is reflected back by the reflection sheet 90 adjacent to the bottom surface 88, and then passed through the lower plate 88. The light emitting surface 882 is directed to the diffusing plate 125; part of the light is transmitted to the side 883 of the lower plate 88 as the light L2, and since the side surface 883 has a reflective material (not shown), the light u is reflected into the upper plate %, and then transmitted to the upper plate. The slope 8431 of the side surface 843 is also coated with a light-reflecting material (not shown). The light L2 is reflected by the slope 8431 to the light-emitting surface 842 of the upper plate 84, and is then emitted through the diffusion plate 125. In the light guide plates 40, 60, 80 and the backlight module 100 of the present invention, the structure of the edge of the upper plate and the lower plate 1261130 is combined, so that the incident light source can be transmitted in the upper and lower plates, and the side faces of the upper plate and the side of the lower plate are working. In the middle, the light incident on the lower plate and the upper plate can be respectively reflected to increase the uniformity between the upper and lower plates, so that the brightness uniformity of the light-emitting surface of the light guide plate is improved. Certainly, the structure of the light guide plate and the backlight module of the present invention is not limited to the above several forms. For example, a plurality of dots may be disposed on the bottom surface of the light guide plate and the lower plate; and the reverse button material coated on the sides of the upper plate and the lower plate may also be The recessed areas 445 and 845 for placing the reflective sheet may be formed on the bottom surface of the lower plate; the shape of the side surfaces of the upper and lower plates is not limited to the above embodiment, and the side shape design is only required to satisfy the side and lower plates of the upper plate. The side of the work can be separately reflected into the lower plate and the upper plate. According to the above description, the present invention has indeed met the requirements of the invention patent, and the special office is requested according to law. The above description is only a preferred embodiment of the present invention, and the above-described embodiments are limited to those skilled in the art, and equivalent modifications or variations made by those skilled in the art in accordance with the spirit of the present invention should be Covered in the scope of the following patents. [Simple description of the diagram] The first diagram is a schematic diagram of a prior art backlight contact. f is a perspective view of a first embodiment of the present invention. The third figure is a schematic plan view of the light guide plate shown in the second figure. 1261130 The fourth figure is a perspective view of a second embodiment of the light guide plate of the present invention. The fifth figure is a schematic plan view of the light guide plate shown in the fourth figure. Figure 6 is a perspective view showing a third embodiment of the light guide plate of the present invention. The seventh figure is a plan view of the light guide plate shown in the sixth figure. The eighth figure is a perspective view of the backlight module of the present invention. [Description of main components] Light guide plates 40, 60, 80 Upper plates 44, 64, 84 Lower plates 48, 68, 88 Light-incident surface 441 > 481 > 84 881 Light-emitting surface 442, 482, 842, 882 Bottom surface 444 , 484 , 844 , 884 side 443 , 643 , 683 , 483 , 843 , 883 recessed area 445 , 845 inclined surface 8431 vertical surface 8432 diffusing plate 125 reflective sheet 90 backlight module 100