200928494200928494
【發明所屬之技術領域】 本發明是有關於一種平面顯示器，且特別是有關於一種 背光模組及其在液晶顯示器（LCD)上的應用。 【先前技術】 由於液晶顯示器本身無法發光’而需藉助背光模組來提 供液晶顯示面板充足且均勻亮度的光源，來使得液晶顯示面 板能顯示影像。正因為如此，背光模組為液晶顯示器中相當 關鍵之零組件。背光模組依光源的位置而可分為直下式背光 模組與側邊入光式背光模組。為達輕巧與薄型化以利攜帶的 目的，筆記型電腦等可攜式裝置的顯示器大都採用側邊入光 式背光模組。 請參照第1圖’其係繪示傳統背光模組之結構的剖面示 意圖。一般而言，背光模組100主要由導光板（Light GuideBACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a flat panel display, and more particularly to a backlight module and its use on a liquid crystal display (LCD). [Prior Art] Since the liquid crystal display itself cannot emit light, it is necessary to provide a light source with sufficient and uniform brightness of the liquid crystal display panel by means of the backlight module, so that the liquid crystal display panel can display an image. Because of this, the backlight module is a relatively critical component in liquid crystal displays. The backlight module can be divided into a direct type backlight module and a side edge light-in type backlight module according to the position of the light source. In order to achieve light weight and thinness for portable purposes, most portable displays such as notebook computers use side-lit backlight modules. Please refer to Fig. 1 for a schematic cross-sectional view showing the structure of a conventional backlight module. In general, the backlight module 100 is mainly composed of a light guide plate (Light Guide)
Plate)l〇8、光學膜片no與116、光源114、光源反射罩112、 背板102與膠框118所組成’其中光學膜片11()為反射片， 而光學膜片116則可為擴散片或增亮膜等。背板1〇2主要係 由底板104與侧板106所構成’其中側板1 〇6環繞底板104， 且側板106之一側邊與底板1 〇4之側邊互相接合。導光板 設置在背板1〇2之内部，且位於底板1〇4上。導光板ι〇8 主要係在於使光源114所發出之光能均勻分佈於整體的背 光模組10(K光源114設置在背板1〇2内部，且介於側板1〇6 與導光板108之侧面之間。光源114 一般係採用冷陰極燈管 (CCFL)〇 200928494Plate), optical film no and 116, light source 114, light source reflector 112, back plate 102 and plastic frame 118 are composed of 'where optical film 11 () is a reflective sheet, and optical film 116 can be Diffusion sheet or brightness enhancement film, etc. The back plate 1 2 is mainly composed of a bottom plate 104 and a side plate 106. The side plates 1 〇 6 surround the bottom plate 104, and one side of the side plates 106 and the side edges of the bottom plate 1 〇 4 are engaged with each other. The light guide plate is disposed inside the back plate 1〇2 and is located on the bottom plate 1〇4. The light guide plate ι 8 is mainly used to uniformly distribute the light emitted by the light source 114 to the entire backlight module 10 (the K light source 114 is disposed inside the back plate 1 〇 2 and interposed between the side plates 1 〇 6 and the light guide plate 108). Between the sides, the light source 114 is generally a cold cathode lamp (CCFL) 〇200928494
Ο 具有反射功能之光學膜片110則貼設在導光板1〇8之底 面’而介於導光板108與底板104之間。光源反射罩112 則係鄰設在側板10 6之内側面’且介於導光板1 〇 8之侧面與 背板102之側板106之間，其中光源反射罩112之剖面形狀 呈U字型，以將光源114罩設住。光學膜片丨丨〇與光源反 射罩112均係用以將光源114所發射之光，反射至導光板 108，以增加光源114之使用效率。光學膜片丨丨6則位於導 光板108上，光學膜片116主要係用以使從導光板1〇8所發 射出之光的免度更大或分佈更為均勻。待光學膜片1 i 6設置 完成後，即可將膠框118設置在側板106之另一侧邊上，而 遮蓋住燈管反射罩112之上側面 '以及部分之導光板1 〇 8 與部分之光學膜片116上、 目前，為提升行動電話、個人數位助理（pDA)與筆記型 電腦（NB)等可攜式裝置之顯示元件的輝度與省電效能°，降 低材料成本，並使這些可攜式裝置獲得更進一步的輕薄化， 而發展出導光板之V型溝槽（γ-cut)切削技術。請參照第2 圖，V-Cut導光板120主要係直接在導光板12〇之表面122 進行稜鏡微加工，以使v型溝槽124直接成型在導光板12〇 的表面122上。 然而，具有V-Cut結構之導光板在應用上會面臨一些問 題。-般常見的問題主以在於採用v_Cut結構之導光^ 筆記型電腦，在進行震動和衝擊試驗時，例如對背光模组之 背板施加背壓的測試時，受壓之背板會進而壓迫導光板，如 此-來’導光板表面上之v_Cut結構容易因受壓而損壞因 此極容易致使顯示晝面出現白點（編6 s_的現象，嚴重 6 200928494 影響液晶顯示裝置的顯示品質，並造成產·品可靠度下降 【發明内容】 因此，本發明之目的就是在提供一種背光模組，其背板 設有至少一凹折部延伸橫跨背板，而使背板之二邊緣區具有 高低差，如此一來，導光板之中央區域懸空於背板之上而形 成緩衝空間。故，可避免因背板受壓而壓迫損毁導光板之表 面結構。 ❹ 本發明之另一目的是在提供一種背光模組，其導光板可 完全位於背板之内、背板之一部分邊緣係位於導光板之外圍 邊緣區且另一部分邊緣係延伸於導光板之外、或者背板之邊 緣係位於導光板之外圍邊緣區，因此背板受壓時可將應力導 引至導光板或背光模組之外圍，而可避免應力聚集在背光模 組之内部，進而可有效避免壓壞導光板。 本發明之又一目的是在提供一種背光模組，其背板之上 側係採用非鎖固的固定方式，因此當背板受背壓時，背板之 Q 上側仍可滑移，而可提供應力緩衝效果。 本發明之再一目的是在提供一種液晶顯示器，可大幅降 ,導練因背板受背壓而遭損壞的機會，而可有效提高液晶 不益之可#度，進而可延長液晶顯示器之使用壽命。 根據本發明之上述目的，提出—種背光模組，至少包 包括链具有至少一凹折部延伸橫跨該背板’其中背板 ^括第-邊緣區與第二邊緣區分別位於凹折部之二側； 光板設於背板之上，其中導朵 *中導先板之底面具有第-側邊區、第 —側邊區、以及中本r5• 梦 木 夂〒央Q位於第一側邊區與第二側邊區之間， 200928494 第一側邊區與第二側邊區分別壓設於背板之第一邊緣區與 第二邊緣區上，而中央區懸空在背板之上；以及一光源設於 導光板之一侧邊且鄰近底面之第一側邊區β 依照本發明一較佳實施例’上述之背光模組更至少包括 -膠框圍設在背板之外緣’其中f板之第二邊緣區為此膠框 所承托。 依照本發明之另一較佳實施例，上述之膠框更包括至少 一卡勾，以固定背板之第二邊緣區。 ❹ 根據本發明之目的，提出一種液晶顯示器，至少包括一 背光模組、以及一液晶顯示面板設於背光模組之上。背光模 組至少包括：一背板，具有至少一凹折部延伸橫跨背板，其 中背板包括第一邊緣區與第二邊緣區分別位於凹折部之二 側；一導光板設於背板之上，其中導光板之底面具有第一侧 邊區、第二側邊區、以及中央區位於第一側邊區與第二側邊 區之間，第一側邊區與第二側邊區分別壓設於背板之第一邊 緣區與第二邊緣區上，而中央區懸空在背板之上；以及一光 Q 源設於導光板之一側邊且鄰近底面之第一側邊區。 依照本發明一較佳實施例，上述背光模組更至少包括一 電路板，且此電路板設於背板之第二邊緣區之下方。 依照本發明之另一較佳實施例，上述之背光模組更至少 包括一電路板，且此電路板介於背板之第二邊緣區與導光板 之底面之間。 【實施方式】 本發明揭露一種背光模組及其應用。為了使本發明之敘 200928494 述更加詳盡與完備，可參照下列描述並配合第3圖至第6B 圖之圖式。 請一併參照第3圖至第6B圖，其中第3圖係繪示依照 本發明一較佳實施例的一種液晶顯示器之裝置系統圖，第4 圖係繪示第3圖之液晶顯示器的上視圖，第5圖係繪示沿著 第4圖之剖面線所獲得之液晶顯示器的剖面圖，而第6 a圖 與第6B圖則係分別緣示第5圖之二放大部分的剖面圖。液 晶顯示器200主要係由背光模組220與液晶顯示面板216 所組成，其中液晶顯示面板216設於背光模組220之上，亦 即背光模組220位於液晶顯示面板216之背面，以從背面提 供液晶顯示面板216光源。此外，液晶顯示器2〇〇通常更包 括别框218 ’其中刖框218框罩在.液晶.顯示面.板2外侧之 邊緣區，且前框218可以與背光模組220之背板202結合， 而將液晶顯示面板216與背光模組220組合在一起，如第3 圖與第4圖所示。在一實施例中，液晶顯示器2〇〇可應用於 筆記型電腦等可攜式裝置中，其中為滿足可攜式裝置對於輕 巧薄型化的需求，大都採侧邊入光式背光模組。而在本示範 實施例中’背光模組220即是一種侧邊入光式背光模組。 背光模組220主要包括背板202、導光板208、以及光 源222。背板202之主要功能係提供整個背光模組22〇結構 上的支撐，因此背板202通常係由金屬板件或硬質塑膠板件 所構成。由金屬板件所構成之背板202同時亦可作為整個膜 組之散熱的傳導媒介。背板202包括至少一凹折部224，其 中此凹折部224延伸而橫跨過整個背板202,藉以使得凹折 部224二側的背板202的二平板部226與228具有高度上的 200928494 落差。背板202包括邊緣區230與232，其中邊緣區230與 232分別位於平板部226之一側與平板部228之一侧，且邊 緣區230與232分別位於背板202之相對二側。而由於平板 部226與228分別位於凹折部224之二側，因此邊緣區230 與232也分別位於凹折部224之二側，且邊緣區230與232 之間亦因凹折部224的存在而具有高度上的落差，如第3 圖、第5圖與第6A圖所示。 導光板208設置在背板202之上，其中導光板208之底 面256承靠在背板202之底面上。導光板208之底面256 大致區分成二側邊區250與254、以及中央區252，其中此 二側邊區250與254分別位於導光板208之底面256的相對 二側，而中央區252則是介於此二侧邊區250與254之間， 如第3圖與第5圖所示。導光板208之底面256的側邊區 250壓合在背板202之平板部228的邊緣區232上，而由背 板202之邊緣區232所承托，如第6B圖所示；導光板208 之底面256的侧邊區254壓合在背板202之平板部226的邊 緣區230上，而由背板202冬邊緣區230所承托，如第6A 圖所示。在本示範實施例中，導光板208之底面256的側邊 區250落在背板202之邊緣區232内，而導光板208之底面 256的側邊區254超出背板202之邊緣區230，但背板202 之邊緣區230係落在而導光板208之底面256的侧邊區254 的外邊緣區，如第5圖所示。在另一示範實施例中，導光板 208可完全位於背板202的範圍内。在其他示範實施例中， 導光板208之底面256的側邊區250落在背板202之邊緣區 232内，且導光板208之底面256的侧邊區254亦落在背板 10 200928494 202之邊緣區230内。 在本示範實施例中，導光板208具有楔型結構，且導光 板208之厚度從鄰近底面256的側邊區250之一侧邊朝相對 之另一侧邊遞減，如第5圖所示。在其他實施例中，導光板 208亦可為均勻厚度之平板結構。在一些實施例中，導光板 208更可為表面具有V-Cut結構的導光板。 由於背板202設有凹折部224，而使得背板202相對二 侧上的邊緣區230與232之間具有高度上的落差，因此當導 光板208之底面256的二侧邊區250與254分別對應壓合在 背板202相對二侧的邊緣區232與230上時，導光板208 之底面256的中央區252與背板202之間會產生緩衝空間 244，而使導光板208之底面256的中央區252懸空在背板 202之上，如第5圖所示。如此一來，當背板202受到背壓 力258壓迫時，導光板208之底面256與背板202之間的緩 衝空間244可供背板202活動，而可防止背板202直接壓迫 到導光板208，進而可提供導光板208更為優異的防護，大 幅提高導光板208的可靠度，更可延長背光模組220之操作 壽命。此外，由於背板202之一部分邊緣係位於導光板208 之外圍邊緣區且另一部分邊緣係延伸於導光板208之外（如 第5圖與第6A圖所示）、或者導光板208可完全位於背板 202之範圍内，因此當背板202遭道背壓力壓迫時，可將應 力導引至導光板208之外圍或背光模組220之外圍，如此一 來可避免應力聚集在導光板208之内部或背光模組之内 部，進而可有效避免壓壞導光板208之表面的微結構，可確 保顯示品質。 11 200928494 光源222設於導光板208之一側邊，且光源222所設置 之此側邊鄰近於導光板208底面256之側邊區250，如第5 圖與第6B圖所示。光源222可例如採用冷陰極燈管或發光 二極體（LED)。光源222在導光板208之侧邊所發光之光經 過導光板208之導引後，可使光源222所發出之光均勻分佈 於整個背光模組220。 依實際產品設計需求，背光模組220可選擇性地包括膠 框204，其中膠框204圍設在背板202之外周緣，並與背板 202結合在一起，且膠框204可支承在導光板208之底面256 的侧邊區254之下方，如第3圖與第5圖所示。配合楔型結 構之導光板208，膠框204包括至少一缓衝部262，其中缓 衝部262夾設在背板202之邊緣區230與導光板208之底面 256的側邊區254之間，以作為導光板208之厚度相對較薄 的一侧與背板202之間的高度緩衝結構，而使導光板208 之厚度較薄的此一侧能透過缓衝部262而順利地由背板202 之邊緣區230所承托，如第6A圖所示。膠框204較佳.更可 包括至少一卡勾260，以固定背板202之邊緣區230的位 置，而可有效避免背板202朝背光模組220之背面彎曲而倒 下，如第6A圖所示。背板202之邊緣區230並未被完全固 定，因此仍可向内或向外移動。但背板202 ·之邊緣區232 則係以係鎖固或卡固方式被完全固定在前框218。卡勾260 包括承托部266與擋牆264，其中承托部266之一側邊與擋 牆264之一側邊相互接合，而形成類L型結構，如第6A圖 所示。卡勾260之承托部266可支撐背板202之邊緣區230, 而擋牆264則可限制背板202之邊緣區230朝擋牆264方向 12 200928494 的位移量。背板202之背面未受到朝向導光板2〇8方向之背 壓力的壓迫時，背板202之邊緣區230與卡勾260的擋牆 264之間具有間距268 ’此時由於背板202之邊緣區232遭 元全固定住而無法自由移動或伸展，因此這樣的間距268 即可k供背板202朝擋牆264方向的延伸或擴展的緩衝空 間。 根據產品需求，背光模組220更可選择性地包括反射片 206，其中反射片206貼設在導光板2〇8之底面256，以將 ，光源222射向背板202底面的光朝背光模組22〇之出光面反 射，如第3圖、第6A圖與第6B圖。在一些實施例中，可 在背板202之底面塗佈反射塗料或採用具反射特性之板材 來作為背板202，如此可省略反射片206的設置。背光模組 220亦可選擇性地設置光學膜片組214於導光板2〇8之頂面 上’以提1¾出光均勻度及/或亮度。在本示範實施例中，光 學琪片組214包括依序疊設在導光板208之頂面上的二光學 膜片210與212’其中光學膜片21〇可為稜鏡片，而光學膜 》 片212可為擴散片。在一實施例中，配合導光板2〇8可為 V-Cut導光板，光學膜片21〇採用逆稜鏡片，而光學膜片212 採用上擴散片。背光模組220更可依實際需求而選擇性地包 括光源反射罩246，其中光源反射罩246罩覆在光源222之 外側，而與導光板208之侧面將光源222完全包圍住，如第 6B圖所示。藉由光源反射罩246的設置可將光源222朝背 光模組220外朝射出的光反射回導光板208，以進一步提升 光源222之效率。 老光模組220更包括電路板248，其中電路板248可例 13 200928494 如為印刷電路板（PCB)。在 。 ^ '知只施例中，電路板248係 叹於月板202之邊緣區23〇之 产杜加典卜城， 卜万，亦即電路板248係設置 在整個背光模組220之外側面卜，1结 士 & & & ▲如第5圖與第6A圖所示。 由於者板202 s免有凹折部224，而枯# ον加 而使侍凹折部224 一侧的平 板部226與.另一側的平板邦9〇〇 ^ ,十板°卩228之間具有高低差，進而在背 板202之平板部226的區肖(#彡$，# 码办烕因此電路板248可設置在 背板202凹陷區域的平板部226，以充分利用背光模組22〇 之空間’避免增加背光模、组22〇之厚度。在另一實施例中，光学 The optical film 110 having a reflective function is attached to the bottom surface of the light guide plate 1〇8 and interposed between the light guide plate 108 and the bottom plate 104. The light source reflector 112 is disposed adjacent to the inner side surface of the side plate 106 and between the side of the light guide plate 〇8 and the side plate 106 of the back plate 102. The cross-sectional shape of the light source reflector 112 is U-shaped. The light source 114 is covered. Both the optical diaphragm 丨丨〇 and the light source reflector 112 are used to reflect the light emitted by the light source 114 to the light guide plate 108 to increase the efficiency of use of the light source 114. The optical film 丨丨 6 is located on the light guide plate 108. The optical film 116 is mainly used to make the light emitted from the light guide plate 1 〇 8 more uniform or evenly distributed. After the optical film 1 i 6 is set, the plastic frame 118 can be disposed on the other side of the side plate 106 to cover the upper side of the lamp reflector 112 and a portion of the light guide plate 1 〇 8 and a portion thereof. On the optical film 116, at present, in order to enhance the brightness and power saving performance of the display elements of portable devices such as mobile phones, personal digital assistants (pDA) and notebook computers (NB), the material cost is reduced, and these are The portable device achieves further thinning and thinning, and the V-channel cutting technology of the light guide plate is developed. Referring to FIG. 2, the V-Cut light guide plate 120 is mainly micro-machined directly on the surface 122 of the light guide plate 12, so that the v-shaped groove 124 is directly formed on the surface 122 of the light guide plate 12A. However, a light guide plate having a V-Cut structure faces some problems in application. The most common problem is the use of the v_Cut structure of the light guide ^ notebook computer, in the vibration and impact test, such as the back pressure of the backlight module back pressure test, the pressure back plate will be pressed The light guide plate, so - the 'v_Cut structure on the surface of the light guide plate is easily damaged by the pressure, so it is easy to cause white spots on the display surface (6 s_ phenomenon, serious 6 200928494 affects the display quality of the liquid crystal display device, and Therefore, the object of the present invention is to provide a backlight module, wherein the back plate is provided with at least one concave portion extending across the back plate, so that the two edge regions of the back plate have The height difference is such that the central region of the light guide plate is suspended above the back plate to form a buffer space. Therefore, the surface structure of the light guide plate can be prevented from being pressed and damaged by the pressure of the back plate. 另一 Another object of the present invention is A backlight module is provided, wherein the light guide plate can be completely located in the back plate, one edge of the back plate is located at a peripheral edge region of the light guide plate and the other portion of the edge extends outside the light guide plate Or the edge of the back plate is located in the peripheral edge region of the light guide plate, so that the stress can be guided to the periphery of the light guide plate or the backlight module when the back plate is pressed, and the stress can be prevented from being concentrated inside the backlight module, thereby It is effective to avoid crushing the light guide plate. Another object of the present invention is to provide a backlight module, wherein the upper side of the back plate is fixed by a non-locking manner, so when the back plate is subjected to back pressure, the upper side of the Q of the back plate is still It can be slipped to provide a stress buffering effect. A further object of the present invention is to provide a liquid crystal display which can greatly reduce the chance of damage caused by the backing of the backing plate, and can effectively improve the liquid crystal. According to the above object of the present invention, a backlight module is provided, at least comprising a chain having at least one concave portion extending across the back plate, wherein the back plate includes - the edge region and the second edge region are respectively located on two sides of the concave portion; the light plate is disposed on the back plate, wherein the bottom surface of the guiding guide has a first side region, a first side region, and a middle portion本r5•梦木夂The central Q is located between the first side zone and the second side zone, and the first side zone and the second side zone are respectively pressed on the first edge zone and the second edge zone of the backboard, and the center is The backlight unit is suspended on the backplane; and a light source is disposed on one side of the light guide plate and adjacent to the first side edge region β of the bottom surface. According to a preferred embodiment of the present invention, the backlight module further includes at least a plastic frame. The second edge region of the f-board is supported by the plastic frame. According to another preferred embodiment of the present invention, the plastic frame further includes at least one hook to fix the backplane. The second edge area is provided. ❹ According to the purpose of the present invention, a liquid crystal display includes at least one backlight module and a liquid crystal display panel disposed on the backlight module. The backlight module includes at least: a back plate having at least A concave portion extends across the back plate, wherein the back plate includes a first edge region and a second edge region respectively located on two sides of the concave portion; a light guide plate is disposed on the back plate, wherein the bottom surface of the light guide plate has a first The side area, the second side area, and the central area are located Between the one side area and the second side area, the first side area and the second side area are respectively pressed on the first edge area and the second edge area of the backboard, and the central area is suspended in the backboard And an optical Q source disposed on one side of the light guide plate and adjacent to the first side edge region of the bottom surface. According to a preferred embodiment of the present invention, the backlight module further includes at least one circuit board, and the circuit board is disposed under the second edge region of the back board. According to another preferred embodiment of the present invention, the backlight module further includes at least one circuit board, and the circuit board is interposed between the second edge region of the backplane and the bottom surface of the light guide plate. Embodiments The present invention discloses a backlight module and an application thereof. In order to make the present disclosure 200928494 more detailed and complete, reference is made to the following description and in conjunction with the drawings of Figures 3 to 6B. Please refer to FIG. 3 to FIG. 6B together, wherein FIG. 3 is a system diagram of a liquid crystal display device according to a preferred embodiment of the present invention, and FIG. 4 is a diagram showing a liquid crystal display device of FIG. Fig. 5 is a cross-sectional view showing the liquid crystal display taken along the section line of Fig. 4, and Fig. 6a and Fig. 6B are sectional views showing the enlarged portion of Fig. 5, respectively. The LCD panel 200 is mainly composed of a backlight module 220 and a liquid crystal display panel 216. The liquid crystal display panel 216 is disposed on the backlight module 220, that is, the backlight module 220 is located on the back of the liquid crystal display panel 216 to provide the back surface. The liquid crystal display panel 216 is a light source. In addition, the liquid crystal display 2 〇〇 generally includes a frame 218 'where the frame 218 is framed on the outer edge of the liquid crystal display surface. The front frame 218 can be combined with the back plate 202 of the backlight module 220. The liquid crystal display panel 216 is combined with the backlight module 220 as shown in FIGS. 3 and 4. In one embodiment, the liquid crystal display device 2 can be applied to a portable device such as a notebook computer. In order to meet the requirements of the portable device for being light and thin, most of the side-in-light backlight modules are used. In the exemplary embodiment, the backlight module 220 is a side-lit backlight module. The backlight module 220 mainly includes a back plate 202, a light guide plate 208, and a light source 222. The main function of the backplane 202 is to provide support for the entire backlight module 22, so the backplane 202 is typically constructed of sheet metal or rigid plastic panels. The backing plate 202 composed of sheet metal members can also serve as a heat transfer medium for the entire film group. The back plate 202 includes at least one concave portion 224, wherein the concave portion 224 extends across the entire back plate 202, so that the two flat portions 226 and 228 of the back plate 202 on both sides of the concave portion 224 have a height. 200928494 The difference. The backing plate 202 includes edge regions 230 and 232, wherein the edge regions 230 and 232 are respectively located on one side of the flat plate portion 226 and one side of the flat plate portion 228, and the edge regions 230 and 232 are respectively located on opposite sides of the back plate 202. Since the flat portions 226 and 228 are respectively located on the two sides of the concave portion 224, the edge regions 230 and 232 are also located on the two sides of the concave portion 224, respectively, and the edge portions 230 and 232 are also separated by the concave portion 224. There is a drop in height, as shown in Figures 3, 5, and 6A. The light guide plate 208 is disposed on the back plate 202, wherein the bottom surface 256 of the light guide plate 208 bears on the bottom surface of the back plate 202. The bottom surface 256 of the light guide plate 208 is roughly divided into two side regions 250 and 254, and a central portion 252, wherein the two side regions 250 and 254 are respectively located on opposite sides of the bottom surface 256 of the light guide plate 208, and the central portion 252 is Between the two side regions 250 and 254, as shown in Figures 3 and 5. The side region 250 of the bottom surface 256 of the light guide plate 208 is pressed against the edge region 232 of the flat portion 228 of the back plate 202, and is supported by the edge region 232 of the back plate 202, as shown in FIG. 6B; the light guide plate 208 The side region 254 of the bottom surface 256 is pressed against the edge region 230 of the flat portion 226 of the backing plate 202, and is supported by the winter edge region 230 of the backing plate 202, as shown in Fig. 6A. In the exemplary embodiment, the side region 250 of the bottom surface 256 of the light guide plate 208 falls within the edge region 232 of the back plate 202, and the side region 254 of the bottom surface 256 of the light guide plate 208 extends beyond the edge region 230 of the back plate 202. However, the edge region 230 of the backing plate 202 falls on the outer edge region of the side region 254 of the bottom surface 256 of the light guide plate 208, as shown in FIG. In another exemplary embodiment, light guide plate 208 can be located entirely within the scope of backing plate 202. In other exemplary embodiments, the side region 250 of the bottom surface 256 of the light guide plate 208 falls within the edge region 232 of the back plate 202, and the side region 254 of the bottom surface 256 of the light guide plate 208 also falls on the edge of the back plate 10 200928494 202. Within area 230. In the exemplary embodiment, the light guide plate 208 has a wedge-shaped structure, and the thickness of the light guide plate 208 decreases from one side of the side edge region 250 adjacent to the bottom surface 256 toward the opposite side, as shown in FIG. In other embodiments, the light guide plate 208 can also be a flat structure of uniform thickness. In some embodiments, the light guide plate 208 may be a light guide plate having a V-Cut structure on the surface. Since the back plate 202 is provided with the concave portion 224 such that the back plate 202 has a height difference between the edge regions 230 and 232 on the opposite sides, when the two side regions 250 and 254 of the bottom surface 256 of the light guide plate 208 are respectively When the edge regions 232 and 230 are pressed on opposite sides of the back plate 202, a buffer space 244 is generated between the central portion 252 of the bottom surface 256 of the light guide plate 208 and the back plate 202, and the bottom surface 256 of the light guide plate 208 is formed. The central zone 252 is suspended above the backing plate 202 as shown in FIG. As a result, when the back plate 202 is pressed by the back pressure 258, the buffer space 244 between the bottom surface 256 of the light guide plate 208 and the back plate 202 can be moved by the back plate 202, and the back plate 202 can be prevented from directly pressing to the light guide plate 208. In addition, the light guide plate 208 can be provided with more excellent protection, the reliability of the light guide plate 208 can be greatly improved, and the operation life of the backlight module 220 can be extended. In addition, since a part of the edge of the back plate 202 is located at a peripheral edge region of the light guide plate 208 and another portion of the edge extends outside the light guide plate 208 (as shown in FIGS. 5 and 6A), or the light guide plate 208 can be completely located. In the range of the back plate 202, when the back plate 202 is pressed by the back pressure, the stress can be guided to the periphery of the light guide plate 208 or the periphery of the backlight module 220, so that stress accumulation on the light guide plate 208 can be avoided. The inside of the internal or backlight module can effectively avoid the micro structure of the surface of the light guide plate 208, and the display quality can be ensured. 11 200928494 The light source 222 is disposed on one side of the light guide plate 208, and the side of the light source 222 is disposed adjacent to the side region 250 of the bottom surface 256 of the light guide plate 208, as shown in FIGS. 5 and 6B. Light source 222 can be, for example, a cold cathode lamp or a light emitting diode (LED). After the light emitted by the light source 222 on the side of the light guide plate 208 is guided by the light guide plate 208, the light emitted by the light source 222 can be evenly distributed throughout the backlight module 220. The backlight module 220 can optionally include a plastic frame 204, wherein the plastic frame 204 is disposed around the outer periphery of the back plate 202 and combined with the back plate 202, and the plastic frame 204 can be supported by the guide frame 204. Below the side area 254 of the bottom surface 256 of the light panel 208, as shown in Figures 3 and 5. The plastic frame 204 includes at least one buffer portion 262. The buffer portion 262 is interposed between the edge region 230 of the back plate 202 and the side region 254 of the bottom surface 256 of the light guide plate 208. With the height buffer structure between the relatively thinner side of the light guide plate 208 and the back plate 202, the side of the light guide plate 208 having a thinner thickness can be transmitted through the buffer portion 262 smoothly from the back plate 202. The edge area 230 is supported as shown in Fig. 6A. The plastic frame 204 preferably includes at least one hook 260 to fix the position of the edge region 230 of the back plate 202, and can effectively prevent the back plate 202 from being bent toward the back surface of the backlight module 220, as shown in FIG. 6A. Shown. The edge region 230 of the backing plate 202 is not fully secured and therefore can still move inward or outward. However, the edge region 232 of the back panel 202 is completely secured to the front frame 218 in a manner of locking or securing. The hook 260 includes a receiving portion 266 and a retaining wall 264, wherein one side of the receiving portion 266 and one side of the retaining wall 264 are joined to each other to form an L-like structure, as shown in Fig. 6A. The receiving portion 266 of the hook 260 can support the edge region 230 of the backing plate 202, while the retaining wall 264 can limit the amount of displacement of the edge region 230 of the backing plate 202 toward the direction of the retaining wall 264 12 200928494. When the back surface of the back plate 202 is not pressed by the back pressure toward the light guide plate 2〇8, the edge region 230 of the back plate 202 and the retaining wall 264 of the hook 260 have a spacing 268′ at this time due to the edge of the back plate 202. The area 232 is fully fixed and cannot be freely moved or stretched, so that the spacing 268 can be used to extend or extend the buffer space of the backing plate 202 toward the retaining wall 264. The backlight module 220 further includes a reflective sheet 206, wherein the reflective sheet 206 is attached to the bottom surface 256 of the light guide plate 2〇8 to direct the light source 222 toward the bottom surface of the back plate 202 toward the backlight module. The group 22 is reflected by the light surface, as shown in Fig. 3, Fig. 6A and Fig. 6B. In some embodiments, a reflective coating may be applied to the bottom surface of the backing plate 202 or a sheet having reflective properties may be used as the backing plate 202, such that the arrangement of the reflective sheet 206 may be omitted. The backlight module 220 can also selectively set the optical film group 214 on the top surface of the light guide plate 〇8 to improve the light uniformity and/or brightness. In the exemplary embodiment, the optical chip set 214 includes two optical films 210 and 212' which are sequentially stacked on the top surface of the light guide plate 208. The optical film 21 can be a bake, and the optical film is 212 can be a diffusion sheet. In one embodiment, the mating light guide plate 2〇8 may be a V-Cut light guide plate, the optical film sheet 21〇 is a reverse diaphragm, and the optical film 212 is an upper diffusion sheet. The backlight module 220 can further include a light source reflector 246 according to actual needs, wherein the light source reflector 246 covers the outer side of the light source 222, and the light source 222 is completely surrounded by the side of the light guide plate 208, as shown in FIG. Shown. The light source 222 is reflected toward the light guide plate 208 toward the light guide plate 208 by the light source reflector 246 to further enhance the efficiency of the light source 222. The old light module 220 further includes a circuit board 248, wherein the circuit board 248 can be, for example, a printed circuit board (PCB). In. ^ 'In the case of the only example, the circuit board 248 is sighed by the edge area of the moon plate 202, 23 〇 杜 杜 杜 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , 1 士士 &&& ▲ as shown in Figure 5 and Figure 6A. Since the plate 202 s is free of the concave portion 224, the dry plate 226 is added to the flat portion 226 on the side of the concave portion 224 and the flat plate on the other side is between 9 and 10 There is a height difference, and further, in the flat portion 226 of the back plate 202, the circuit board 248 can be disposed on the flat portion 226 of the recessed portion of the back plate 202 to fully utilize the backlight module 22〇. The space 'avoids increasing the thickness of the backlight mold, group 22". In another embodiment,
電路板248.可設於背板202夕.遠^·!-、- 牙极U2之邊緣區230與導光板208之底 面256之間’亦即電路板248係設置在整個背光模組22〇 之内部。 請再次參照第3圖與第5圖，液晶顯示面板216設置在 背光模組220之上，且可利用例如黏著物242而接合固定在 膠框204上，並由膠框204所支撐。液晶顯示面板216至少 包括偏光板234與240、薄膜電晶體（TFT)基板236、彩色濾 光片238以及液晶層（未繪示）。偏光板234設在導光板2〇8 上方之光學膜片組214之上’其中偏光板234與光學膜片組 214之間具有間:隙。薄膜電晶鱧基板2 3 6覆蓋在偏光.板.2 3 4 上，彩色濾光片238覆蓋在薄膜電晶體基板236之上，而液 晶層則夾設在薄膜電晶體基板236與彩色濾光片238之間。 偏光板240則覆蓋在彩色濾光片238之上。再將前框218 罩設在液晶顯示面板216之偏光板240的外周緣上，並同時 框住液晶顯示面板216下方之背光模組220的外緣，且與背 光模組220卡合或鎖合，而將液晶顯示面板216與背光模組 220結合在一起，而完成液晶顯示器200之裝置。 14 200928494 k 由上述示範實施例可知，本發明之一優點就是因為_ 範實施例m模m設有至少1折部延伸橫跨: 板，而使背板之二邊緣區具有高低差，進而可使導光板 央區域懸空於背板之上而與背板之間形成緩衝空間。因1中 可避免因背板受壓而壓迫損毀導光板。 ’ 由上述示練佳實施例可知’本發明之另—優點就是因 為一示範實施例之背光模組之導光板可完全位於背板之 内、背板之邊緣係位於導光板之外圍邊緣區、或者背板之邊 ❹ 緣係位於導光板之外圍邊緣區，因此背板受壓時可將應力導 引至導光板或背光模組之外圍，而可避免應力聚集在背光模 組之内部，進而可有效避免壓壞導光板、、 由上述示範較佳實施例可知，本發明之又一優點就是因 為一示範實施例之背光模組之背板的上側係採用非鎖固的 固定方式，因此當背板受背壓時，肯板之上侧仍可滑移，而 可提供應力缓衝效果。 由上述示範較佳實施例可知，本發明之再一優點就是因 〇 為一示範實施例之液晶顯示器可大幅降低導光板因背板受 背壓而遭損壞的機會，而可有效提高液晶顯示器之可靠度， 進而可延長液晶顯示器之使用壽命。 雖然本發明已以一較佳實施例揭露如上，然其並非用以 限定本發明，任何在此技術領域中具有通常知識者，在不脫 離本發明之精神和範圍内，當可作各種之更動與潤飾，因此 本發明之保護範圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 15 200928494 第 第 第 示器之 第 第 的剖面 第 面圖。 第 剖面圖 1圖係緣示傳統背光模組之結構的剖面示意圖。 2圖係緣示-般V_Cut導先板的剖面示意圖。 3圖係繪示依照本發明-較佳實施例的-種液晶顯 裝置系統圖。 ^ 4圖係繪示第3圖之液晶顯示器的上視圖： 5圖係繪示沿著第4圖之剖面線所獲得之液晶顯示器 圖。 6A圖係繪示第5圖之液晶顯示器之一部分的放大剖 6B圖係繪示第5圖之液晶顯示器之另一部分的放大 〇 主要元件符號說明】 1〇〇 :背光模組 104 :底.板 108 :導光板 112 :光源反射罩 116 :光學膜片 120 :導光板 124 : V型溝槽 202 :背板 206 :反射片 210 :光學膜片 214 :光學膜片組 218 前框 102 :背板 106 :側板 110 :光學膜片 114 :光源 118 :膠框 122 :表面 200:液晶顯不 204 :膠框 208 :導光板 212 :光學膜片 216 :液晶顯示面板 220 :背光模組 16The circuit board 248. can be disposed on the back panel 202. The distance between the edge region 230 of the tooth pole U2 and the bottom surface 256 of the light guide plate 208, that is, the circuit board 248 is disposed in the entire backlight module 22〇 Internal. Referring to FIG. 3 and FIG. 5 again, the liquid crystal display panel 216 is disposed on the backlight module 220, and is fixed to the plastic frame 204 by, for example, an adhesive 242, and supported by the plastic frame 204. The liquid crystal display panel 216 includes at least polarizing plates 234 and 240, a thin film transistor (TFT) substrate 236, a color filter 238, and a liquid crystal layer (not shown). The polarizing plate 234 is disposed above the optical film group 214 above the light guiding plate 2'8" with a gap between the polarizing plate 234 and the optical film group 214. The thin film electro-crystal substrate 2 3 6 is covered on the polarizing plate 2. 2 3 4 , the color filter 238 is overlaid on the thin film transistor substrate 236, and the liquid crystal layer is sandwiched between the thin film transistor substrate 236 and the color filter. Between sheets 238. The polarizing plate 240 is overlaid on the color filter 238. The front frame 218 is disposed on the outer periphery of the polarizing plate 240 of the liquid crystal display panel 216, and simultaneously covers the outer edge of the backlight module 220 below the liquid crystal display panel 216, and is engaged or locked with the backlight module 220. The liquid crystal display panel 216 and the backlight module 220 are combined to complete the device of the liquid crystal display 200. 14 200928494 k It can be seen from the above exemplary embodiments that one advantage of the present invention is that the m-mode m is provided with at least one fold extending across the plate, so that the two edge regions of the back plate have a height difference, and thus The central region of the light guide plate is suspended above the back plate to form a buffer space with the back plate. Because 1 can avoid the pressure plate being pressed and damaged by the back plate. The other advantage of the present invention is that the light guide plate of the backlight module of an exemplary embodiment can be completely located in the back plate, and the edge of the back plate is located in the peripheral edge region of the light guide plate. Or the edge of the backing plate is located at the peripheral edge region of the light guide plate, so that the stress can be guided to the periphery of the light guide plate or the backlight module when the back plate is pressed, and the stress can be prevented from accumulating inside the backlight module, thereby further Another advantage of the present invention is that the upper side of the back panel of the backlight module of the exemplary embodiment is a non-locking fixing manner, so that when the light guide plate is crushed, it is known from the above preferred embodiment. When the backing plate is subjected to back pressure, the upper side of the Ken plate can still slide, and the stress buffering effect can be provided. It is a further advantage of the present invention that the liquid crystal display of the exemplary embodiment can greatly reduce the chance of the light guide plate being damaged by the back pressure of the back plate, thereby effectively improving the liquid crystal display. Reliability, which in turn extends the life of the LCD display. Although the present invention has been described above in terms of a preferred embodiment, it is not intended to limit the invention, and it is intended that various modifications may be made without departing from the spirit and scope of the invention. And the scope of the present invention is defined by the scope of the appended claims. [Simple description of the drawing] 15 200928494 The first section of the first indicator is shown in the first section. Fig. 1 is a schematic cross-sectional view showing the structure of a conventional backlight module. 2 The diagram shows the cross-section of the general V_Cut guide plate. 3 is a system diagram of a liquid crystal display device in accordance with the preferred embodiment of the present invention. 4 shows a top view of the liquid crystal display of Fig. 3: Fig. 5 shows a liquid crystal display obtained along the section line of Fig. 4. 6A is a magnified section 6B of a liquid crystal display of FIG. 5, showing a magnified portion of another part of the liquid crystal display of FIG. 5, a main component symbol description] 1: backlight module 104: bottom plate 108: light guide plate 112: light source reflector 116: optical film 120: light guide plate 124: V-shaped groove 202: back plate 206: reflective sheet 210: optical film 214: optical film group 218 front frame 102: back plate 106: side plate 110: optical film 114: light source 118: plastic frame 122: surface 200: liquid crystal display 204: plastic frame 208: light guide plate 212: optical film 216: liquid crystal display panel 220: backlight module 16
200928494 222 :光源 226 :平板部 230 :邊緣區 234 :偏光板 238 :彩色濾光片 242 :黏著物 246 :光源反射罩 250 :侧邊區 254 :侧邊區 258 :背壓力 262 :緩衝部 2 6 6 :承托部 224 :凹折部 228 :平板部 232 :邊緣區 236 :薄膜電 240 :偏光板 244 :緩衝空 248 :電路板 252 :中央區 256 :底面 260 :卡勾 264 :擋牆 268 :間距 晶體基板 間200928494 222: Light source 226: Flat plate portion 230: Edge region 234: Polarizing plate 238: Color filter 242: Adhesive 246: Light source reflecting cover 250: Side region 254: Side region 258: Back pressure 262: Buffer portion 2 6 6 : receiving portion 224 : concave portion 228 : flat portion 232 : edge region 236 : thin film electricity 240 : polarizing plate 244 : buffer blank 248 : circuit board 252 : central region 256 : bottom surface 260 : hook 264 : retaining wall 268 : Between spaced crystal substrates
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