200912465 P060206SBZ1TW 21124twf.doc/p 九、發明說明： 【發明所屬之技術領域】 本發明是有關於-種顯示元件與發光元件，且特 有關於一種液晶顯示器及其背光模組。 疋 【先前技術】 Ο u 在—般顯示器中，由於液晶顯示面板本身並不呈有發 :功故/液晶顯示面板下方必須配置—背光絲 =供：：光源’以使液晶顯示面板能達到顯示書面之目 描式ί:二=升顯示晝面之品質，市場上因而有了掃 描式月先梹組（Scan backlightmodule)的出現。 圖1A是習知一發光二極體的掃描式直下 3考圖1，習知之掃描式背光模組110包括 』個設置於條狀電路板(光源條)⑴上的 發光—極體114，發光二極體114通常 、 原色發光二極體。I巾，、、、 i及、、，彔一 向脑m 相12可劃分出四個沿同-方 八 知描區域卜11、1^與IV。此外，發光二極轉n4 '刀別配置於掃描區域Ι、Π、ΙΙΙ轉巾。_ 當液晶县昏+品上^具體而έ ’例如 面非為1二（未緣示）對應掃描區域I之顯示部分書 描二二輸入晝素灰階信號的晝素行(R_)時，掃 以tT此^^㈣崎描區域1狀發先二極體 影。然而，掃描的，信號被顯示而造成畫面殘 因此位於掃沖與1間並無間隔板阻隔， 會干擾體r*的部分光線 次進而對原本欲達成之低殘影顯示效 200912465 m〇206SBZMV^ 21124twf.doc/p 果造成不良影響。 ，上述，掃描區域m與ιν内之發光二極體ι]4雖然 ，描區域！較遠，但其所發“部分树也會干擾到掃 描區域I。為了改善光源相互干擾之問題，若 板來隔開掃描區域J、、JJQ；與jy， 所#^ t 幻知插式背光模組1Ϊ0 戶於間隔板處相當容易M生暗紋，進而使 尸汁提供光源之品質下降。 數目^方，二直下式背光模組所需發光二極體m 用成ίΓ 龍罩整侧示區域，且耗電量也增加了使 另外，有一較為節省發光二極體 μ 1Β所示之一側邊式背光模組u 〇 ^十^、， U3,，並在對應於顯干或兩侧）配置光源條 導光板m。此外，導光板=的空間安放多個長條狀之 示區域mi 所發出之光線向上反射至顯 織’以作為顯示晝面所需之光源。 職·、，負 ΪΙΙ與IV奸門H式肖光"^組11G’只能以掃描區域I、II、 [間内的某一局部書 ，動，目此無法再針對各 畫面之顯示品質。C，進而無法有效提升細部 限於光源與導光板^之門^區域1、11、111 _因受 同1方向排列’這會使‘、配J位置關係’因此是沿著 播方向受限於—個 叹掃描式背光模組110之掃 又上。右追求更高品味的顯示晝質， 200912465 P060206SBZ1TW 21124twf.doc/p 而在二維度的局部位置要作區域性的背光源亮暗控制，以 配合局部晝面資料的亮暗，則難以達到。因此，如何開發 一能兼顧在低耗電狀況下又能有二維的動態背光控制，實 為一重要課題。 另外，請參考圖2，習知之液晶顯示器1〇〇主要是由 月光模組110與液晶顯示面板120所構成。一般液晶顯示 面板120内會含有液晶LC，以控制背光模組丨1〇所發出之 〇 光線能否通過液晶顯示面板120。這裡要說明的是，習知 之^光模組110所發出之光線L1與12由於是屬於散射的 狀，，因此其準直性不佳且會有光程差無法一致的問題。 更詳細而言，這是由於液晶顯示面板120中光線L1行徑 上所經過的液晶LC排列狀態與光線L2行徑上所經過的液 晶LC排列狀態不同所致，以導致由液晶顯示面板12〇出 射之光線L1與光線L2亮度上有所差異。換言之，液晶顯 不面板120之顯示晝面會因視角改變而有不良的色偏現 象’實有改進之必要。 〇 【發明内容】 有鑑於此，本發明其中之—目的是提供一種背光模 組，其具有兩個維度的掃描方向以及能提供準直性良好的 光源。 本發明之另一目的是提供一種液晶顯示器，其應用本 I明之背光模組而能有效改善顯示晝面會因視角改變而有 不良的色偏現象，以提升顯示晝面之品質。 為達上述或是其他目的，本發明提出一種背光模組， 200912465 P060206SBZ1TW 21124twf.doc/p 其包括一燈箱與多個發光單元。其中，發光單元沿一第一 方向與一第二方向陣列排列於燈箱内。每—發光單元包括 多個燈源與一導光板，而燈源配置於導光板之底部。 在本發明之一實施例中，上述之第—方向與第二方向 可以是互相垂直。 、在本發明之一實施例中，上述之背光模組更包括一侧 邊發光型發光二極體（Side emitting type LED)。 在本發明之一實施例中，上述之背光模組更包括一光 導引元件，其配置於每一發光單元内且位於燈源與導光板 之間，其中光導引元件適於將燈源所發出的光線導引至侧 向’以射入導光板。 在本發明之一實施例中，上述之光導引元件包括一透 鏡。 在本發明之一實施例中，上述之導光板具有一光反射 面與—光出射面，燈源所發出之光線藉由光反射面之反射 而由光出射面出射。 在本發明之一實施例中，上述之光反射面可以為弧 狀。 在本發明之一實施例中，上述之導光板可以具有一凹 槽，且燈源藉由凹槽而配置於弧狀之光反射面之焦點處。 在本發明之一實施例中，上述之光反射面可以為一斜 面。 在本發明之一實施例中’上述之導光板可以具有一凹 槽’凹槽位於導光板之底部中心處，且燈源配置於導光板 200912465 FU60206SJaznW 21124twf.doc/p 之凹槽内。 在本發明之一實施例中，上述之燈源包括白光發光二 極體。 在本發明之一實施例中，上述之燈源包括紅色發光二 極體、綠色發光二極體與藍色發光二極體。 在本發明之一實施例中，上述之導光板之底面可以有 多個印刷網點。 在本發明之一實施例中，上述之背光模組更包括多個 v形槽’其分別配置於導光板之底面。 在本發明之一實施例中，上述之背光模組更包括多個 反射片’其分別配置於導光板之底面。 盥本發明提出一種液晶顯示器，其包括上述之背光模組 與-液晶顯示面板。其中’液晶顯示面板配置於背光模组 上方。 在本發明之一實施例中，上述之液晶顯示器更包括一 擴散膜>{，其配置於液晶顯示面板遠離f光模組之一面上。 本發明之背光模組因具有沿第一方向與第二方向陣 【，歹j的發光單％。因此，本發明之背紐組可以有兩個 ϋ的掃描方向，進而可有效提升晝社顯示品f。由於 ^之背光模組可藉由配置燈源於光反射面之焦點處， 曰f供Ϊ晶顯示面板高準直性之光源。因此，本發明之液 現ί下盗可有效改善顯示晝面會因視角變化而產生的色偏 為讓本發明之上述和其他目的、特徵和優點能更明顯 200912465 P060206SBZ1TW 21124twf.doc/p 易懂’下文特舉較佳實施例，並配合所附圖式，作詳細說 明如下。 【實施方式】 第一實施例。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。疋[Prior Art] Ο u In the general display, because the LCD panel itself does not have a hair: power / LCD panel must be configured below - backlight wire = for:: light source 'to enable the liquid crystal display panel to achieve display Written eyesight ί: The second = liter shows the quality of the noodles, and the market has the appearance of a scanning type of the backlight module. 1A is a scanning direct type 3 of a conventional light-emitting diode. FIG. 1 is a schematic diagram of a conventional scanning backlight module 110 including a light-emitting body 114 disposed on a strip-shaped circuit board (light source strip) (1). The diode 114 is usually a primary color light emitting diode. I towel,,,, i,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In addition, the light-emitting diode to n4 'knife is placed in the scanning area Ι, Π, ΙΙΙ ΙΙΙ. _ When the LCD County is faint + on the product ^ specific and έ ' For example, the surface is not 1 2 (not shown) corresponding to the scanning area I display part of the description of the binary input gray signal of the elementary line (R_), sweep In the tT this ^^ (four) Saki area, the first bipolar body shadow. However, if the signal is displayed, the signal is displayed and the picture is disabled. Therefore, there is no space between the sweep and the barrier. It will interfere with the partial light of the body r* and then display the effect of the low residual image originally intended. 200912465 m〇206SBZMV^ 21124twf.doc/p has an adverse effect. In the above, the scanning area m and the light-emitting diode ι]4 in the ιν, although the area! Farther, but the "partial tree" will also interfere with the scanning area I. In order to improve the mutual interference of the light source, if the board separates the scanning area J, JJQ; and jy, the #^ t phantom insert backlight The module 1Ϊ0 is quite easy to M dark lines on the partition plate, which makes the quality of the light source of the corpse juice drop. The number of squares, the two direct-lit backlight modules need to be used for the light-emitting diodes. The area, and the power consumption is also increased. In addition, there is a side-saving backlight module u 〇^10^, U3, which is more transparent to the light-emitting diode μ 1 Β, and corresponds to the stem or the sides The light source strip light guide plate m is arranged. In addition, the light emitted by the light guide plate = a plurality of long strips of the area mi is reflected upward to the visible weave as a light source required for displaying the kneading surface. ΪΙΙ and IV 奸门H-style Xiaoguang"^ group 11G' can only scan areas I, II, [a certain part of the book, move, can not be used for the display quality of each picture. C, and thus can not The effective lifting detail is limited to the light source and the light guide plate ^ the door ^ area 1, 11, 111 _ due to the same direction Arrange 'this will make ', J position relationship' is therefore limited along the broadcast direction - the scan of the sing-scan backlight module 110. Right to pursue a higher taste display enamel, 200912465 P060206SBZ1TW 21124twf.doc/ p, in the local position of the two-dimensional degree to be a regional backlight light and dark control, in order to match the brightness of the local surface data, it is difficult to achieve. Therefore, how to develop one can take into account the low power consumption can have two The dynamic backlight control of the dimension is an important issue. In addition, referring to FIG. 2, the conventional liquid crystal display 1 is mainly composed of a moonlight module 110 and a liquid crystal display panel 120. Generally, the liquid crystal display panel 120 may contain liquid crystal. The LC is used to control whether the light emitted by the backlight module 丨1〇 passes through the liquid crystal display panel 120. It is to be noted that the light beams L1 and 12 emitted by the conventional optical module 110 are scattered. Therefore, the collimation is not good and there is a problem that the optical path difference cannot be uniform. In more detail, this is due to the alignment state and light of the liquid crystal LC passing through the path of the light L1 in the liquid crystal display panel 120. The alignment state of the liquid crystal LC passing through the L2 path is different, so that the brightness of the light L1 and the light L2 emitted by the liquid crystal display panel 12 is different. In other words, the display surface of the liquid crystal display panel 120 is changed by the viewing angle. In view of the above, the present invention provides a backlight module having two dimensions of scanning direction and providing collimation. A good light source. Another object of the present invention is to provide a liquid crystal display, which can effectively improve the quality of the display surface due to the change of the viewing angle by using the backlight module of the present invention. . To achieve the above or other objects, the present invention provides a backlight module, 200912465 P060206SBZ1TW 21124twf.doc/p which includes a light box and a plurality of light emitting units. The light emitting unit is arranged in the light box along a first direction and a second direction array. Each of the light-emitting units includes a plurality of light sources and a light guide plate, and the light source is disposed at the bottom of the light guide plate. In an embodiment of the invention, the first direction and the second direction may be perpendicular to each other. In an embodiment of the invention, the backlight module further includes a side emitting type LED (Side emitting type LED). In an embodiment of the present invention, the backlight module further includes a light guiding component disposed in each of the light emitting units and located between the light source and the light guide plate, wherein the light guiding component is adapted to be the light source The emitted light is directed to the lateral direction to enter the light guide. In an embodiment of the invention, the light guiding element comprises a lens. In an embodiment of the invention, the light guide plate has a light reflecting surface and a light exiting surface, and the light emitted by the light source is emitted from the light emitting surface by reflection of the light reflecting surface. In an embodiment of the invention, the light reflecting surface may be arcuate. In an embodiment of the invention, the light guide plate may have a recess, and the light source is disposed at a focus of the arc-shaped light reflecting surface by the recess. In an embodiment of the invention, the light reflecting surface may be a sloped surface. In one embodiment of the present invention, the light guide plate may have a recessed groove at the center of the bottom of the light guide plate, and the light source is disposed in the groove of the light guide plate 200912465 FU60206SJaznW 21124twf.doc/p. In an embodiment of the invention, the light source comprises a white light emitting diode. In an embodiment of the invention, the light source comprises a red light emitting diode, a green light emitting diode and a blue light emitting diode. In an embodiment of the invention, the bottom surface of the light guide plate may have a plurality of printed dots. In an embodiment of the invention, the backlight module further includes a plurality of v-shaped grooves ′ disposed on the bottom surface of the light guide plate. In an embodiment of the invention, the backlight module further includes a plurality of reflective sheets ′ disposed on the bottom surface of the light guide plate. The present invention provides a liquid crystal display comprising the above-described backlight module and liquid crystal display panel. The liquid crystal display panel is disposed above the backlight module. In an embodiment of the invention, the liquid crystal display further includes a diffusion film >{, which is disposed on a side of the liquid crystal display panel away from the f-light module. The backlight module of the present invention has a single light-emitting unit in the first direction and the second direction. Therefore, the back button group of the present invention can have two scanning directions of the crucible, thereby effectively improving the display f of the company. Since the backlight module can be configured to source the light from the focus of the light reflecting surface, the light source is provided with a high collimating light source for the twin crystal display panel. Therefore, the present invention can effectively improve the color shift caused by the change of the viewing angle of the present invention, so that the above and other objects, features and advantages of the present invention can be made more obvious. 200912465 P060206SBZ1TW 21124twf.doc/p Easy to understand DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments are described below in conjunction with the drawings and are described in detail below. Embodiments First Embodiment
圖3A是本發明第一實施例之背光模組示意圖，而圖 3B是本發明第一實施例之發光單元之剖面示意圖。請同時 參考圖3A與圖3B，本實施例之背光模組2〇〇為一直下式 背光模組（direct type backlight module)，且其包括一燈 箱210與多個發光單元22〇。其中’發光單元沿一^ 一方向D1與一第二方向D2陣列排列於燈箱21〇内。舉例 =言，第一方向D1與第二方向〇2可以是互相垂直，當然 第-方向D1與第二方向D2也可以是其他二維方向性配 置’在此並不刻意侷限。 實務上，發光單元220可提供液晶顯示面板（未緣示） 所需之面光源，而每—發光單元220都可透過簡單的線路 各^啟或關。換言之，依照液晶顯示面板中顯示書面 鱗欲呈現之明暗程度，發光單元220可配合顯示 二面各區塊之财程度_啟或關，哺糊示效果。 $要說明的是’圖从所示之發光單元22〇數目為Μ個。 二所屬技術領域中具有通常知識者應知發光單元⑽ 以視需求而增減，在此並不刻意局限其數目。此 方向ml發明之發光單元22θ沿著第—方向D1與第二 個維度的:此本發明之背光模組可以有兩 命描方向。相較於習知技術，本發明之背光模組 200912465 νυου/υοΜίζ,ι ι W 21124twf.d〇c/p 200能有更高的掃描靈活度來配合顯示晝面之功能需要， 進而能有效提升顯示晝面之品質及品味。 詳細地說，每一發光單元220包括多個燈源222與一 導光板224 (如圖3B所示），·而燈源222配置於導光板 224之底部。其中，導光板224具有一具全反射（T〇tai internal reflection)特性的光反射面224a與一光出射面 224b ’而燈源222發出之光線可藉由光反射面224a之反射 r、而由光出射面224b出射。實務上，上述之燈源222可以為 ' 一般之白光發光二極體，而導光板224 一般是將pc (polycarbonate)或 PMMA (polymethylmethacrolate)透 過射出成型等方式形成塊狀體而製成。換言之，導光板224 之外形可透過射出成型等加工而製作出所需要之形狀。 值得注意的是’導光板224之光反射面224a可以製 成一近似於拋物面或實際上為一拋物面的弧狀，而燈源 222可藉由導光板224内之一凹槽G1而配置於弧狀光反射 面224a之焦點處F。這樣一來，燈源222發出的光線L3 Ci 可透過弧狀光反射面224a之反射’而以實質上垂直光出射 面224b之方向出射。換言之’背光模組2〇〇所發出之光線 L3會有良好的準直性。為了進一步提升背光模組2〇〇所提 供光源之品質’上述之燈源222更可加裝一光導引元件226 來形成一側邊發光型發光二極體（Side emitting type LED)。一般常見之光導引元件226為具有將光線侧向反 射而出的反射面之一透鏡（lens)。請參考美國專利6679621 號。由於側邊發光型發光二極體所發出之光線大部分集中 11 200912465 Λ 2U24twf.doc/p 於侧向’這可有效確保燈源222❹ 一之方向出射而減少二 :要特別說明的是，本發明之發光單元細可 2先板224而發出高準直性之光源，因此發光單元⑽3A is a schematic view of a backlight module according to a first embodiment of the present invention, and FIG. 3B is a schematic cross-sectional view of a light emitting unit according to a first embodiment of the present invention. Referring to FIG. 3A and FIG. 3B, the backlight module 2 of the present embodiment is a direct type backlight module, and includes a light box 210 and a plurality of light emitting units 22A. The light-emitting unit is arranged in the light box 21A in an array along the direction D1 and the second direction D2. For example, the first direction D1 and the second direction 〇2 may be perpendicular to each other. Of course, the first direction D1 and the second direction D2 may also be other two-dimensional directional configurations', which are not deliberately limited herein. In practice, the light-emitting unit 220 can provide a surface light source required for the liquid crystal display panel (not shown), and each of the light-emitting units 220 can be turned on or off through a simple line. In other words, according to the degree of lightness and darkness of the written scale displayed on the liquid crystal display panel, the light-emitting unit 220 can cooperate with the display of the financial level of each of the two sides to open or close, and feed the effect. $ It is to be noted that the number of light-emitting units 22 shown in the figure is one. It is known to those of ordinary skill in the art that the illumination unit (10) is increased or decreased as needed, and the number is not deliberately limited herein. In this direction, the illumination unit 22θ of the invention is along the first direction D1 and the second dimension: the backlight module of the present invention can have two life-drawing directions. Compared with the prior art, the backlight module 200912465 νυου/υοΜίζ, ι ι W 21124twf.d〇c/p 200 of the present invention can have higher scanning flexibility to meet the functional needs of the display surface, thereby effectively improving Show the quality and taste of the noodles. In detail, each of the light emitting units 220 includes a plurality of light sources 222 and a light guide plate 224 (as shown in FIG. 3B), and the light source 222 is disposed at the bottom of the light guide plate 224. The light guide plate 224 has a light reflecting surface 224a and a light exiting surface 224b' having a T全tai internal reflection characteristic, and the light emitted by the light source 222 can be reflected by the light reflecting surface 224a. The light exit surface 224b is emitted. In practice, the light source 222 may be a 'normal white light emitting diode, and the light guide plate 224 is generally formed by forming a bulk of pc (polycarbonate) or PMMA (polymethylmethacrolate) by injection molding or the like. In other words, the outer shape of the light guide plate 224 can be processed by injection molding or the like to produce a desired shape. It should be noted that the light reflecting surface 224a of the light guide plate 224 can be formed into an arc shape similar to a paraboloid or a paraboloid, and the light source 222 can be disposed in the arc by a groove G1 in the light guide plate 224. The focal point F of the light reflecting surface 224a. In this way, the light L3 Ci emitted from the light source 222 can be emitted in the direction of the substantially vertical light exit surface 224b through the reflection of the arc-shaped light reflecting surface 224a. In other words, the light L3 emitted by the backlight module 2 has good collimation. In order to further improve the quality of the light source provided by the backlight module 2, the light source 222 may be further provided with a light guiding element 226 to form a side emitting type LED (Side emitting type LED). A generally common light guiding element 226 is a lens having a reflecting surface that reflects light laterally. Please refer to US Patent No. 6,667,621. Since most of the light emitted by the side-emitting LEDs is concentrated 11 200912465 Λ 2U24twf.doc/p in the lateral direction, this can effectively ensure that the light source 222 is emitted in the direction of the light source and is reduced by two: it is specifically stated that The light-emitting unit of the invention can make a high-collimation light source by the second plate 224, and thus the light-emitting unit (10)
二線可以有效避免干擾到鄰近之發光單元 220。备縣早元22〇需配合顯示晝面㈣請時，也不易受 鄰近之發料元220發出之规㈣亮。料有效提升本 發明之背光模組200所提供光源之品質。 一除了上述之發光單元220外，本發明之發光單元22〇 還可以有其他設計，以下將列舉數種以供說明。圖3C是 本發明第-實施例之另—發光單元之剖面示意圖。請參考 圖3C，為了有效確保背光模組2〇〇所提供光源之準直性， 本實施例之背光模組200仍包括一光導引元件’一般 常見之光導引元件226例如是透鏡（lens)。 實務上，光導引元件226可藉由導光板224内之一適 當大小的凹槽G2而配置於燈源222與導光板224之間。 〇 具體而言，光導引元件226適於將燈源222所發出的光線 導引至側向’以射入導光板224内。這樣一來，燈源222 雖未位於弧狀反射面224a的焦點’但其所朝向側向發出的 大部分光線L4仍可透過弧狀光反射面224a之反射，而以 近似垂直光出射面224b之方向出射。當然，所屬技術領域 中具有通常知識者應知上述導光板224只要能將燈源222 所發出的光線以近似垂直光出射面224b之方向出射即 可，在此並不刻意對導光板224之外形作限制。 12 200912465 P060206St5ZUW 21124twf.doc/p 圖3D是本發明第一實施例之又一發光單元之剖面示 意圖。請參考圖3D，導光板224,之光反射面224，a為一具 有全反射特性的斜面，而此光反射面224，a之傾斜程度只 要能把光線L5以近似垂直光出射面224，b之方向反射即 可。實務上，光反射面224’a之傾斜程度可以經由計算而 得知。為了進一步確保光源之準直性，如圖3E所示，本 發明之發光單元220c更可包括一習知光導引元件226,， 光導引元件226,為一可將燈源222 (發光二極體）的大部 分光線平行地朝水平側向射出的透鏡。此光導引元件226, 可藉由導光板224’内之一凹槽G4而配置於燈源222與導 光板224’之間。光導引元件226,適於將燈源222所發出的 光線導引至側向，以射入導光板224,内，再經由平斜面狀 的光反射面224，a向上反射而出。另一方面，為了提升背 光模組200之發光亮度，如圖3F所示，發光單元22〇d更 "I增5又燈源222以及相應之光導引元件226,來達到目的。 4二實施例 第二實施例與第一實施例類似，兩者主要不同之處在 於：本實施例之發光單元可以藉由設置印刷網點、ν形槽 (V-cut)或反射片，來提升發光單元之混光與反射之效果。 圖4疋本發明第一貫施例之發光單元之局部立體示意 圖。請參考圖4，本實施例之發光單元23〇内之燈源 可以包括紅色發光二極體、綠色發光二極體與藍色發光二 極體，以混合出所需要之白光。此外，發光單元23〇内之 導光板224之光反射面224a上可設有多個v形槽（v_cut) 23 200912465 i W 21124twf.doc/p p。一般而言，V形槽p可經由模具壓印在導光板224表 面製作而成，實務上V形槽P具有反射及調整光行徑方向 之功用。The second line can effectively avoid interference with the adjacent light unit 220. In the early morning of the county, there is a need to cooperate with the display of the noodles (4), and it is not easy to be issued by the neighboring materials 220 (4). The material is effectively improved in the quality of the light source provided by the backlight module 200 of the present invention. In addition to the above-described light-emitting unit 220, the light-emitting unit 22A of the present invention may have other designs, and several will be listed below for explanation. Fig. 3C is a schematic cross-sectional view showing another embodiment of the light-emitting unit of the first embodiment of the present invention. Referring to FIG. 3C, in order to effectively ensure the collimation of the light source provided by the backlight module 2, the backlight module 200 of the embodiment further includes a light guiding component. The generally common light guiding component 226 is, for example, a lens. Lens). In practice, the light guiding element 226 can be disposed between the light source 222 and the light guide plate 224 by a properly sized groove G2 in the light guide plate 224. Specifically, the light guiding element 226 is adapted to direct the light emitted by the light source 222 to the lateral direction to enter the light guide plate 224. In this way, although the light source 222 is not located at the focus of the arc-shaped reflecting surface 224a, most of the light L4 emitted toward the lateral direction can still be reflected by the curved light reflecting surface 224a, and the approximate vertical light emitting surface 224b. In the direction of the exit. Of course, those skilled in the art should know that the light guide plate 224 can emit light in the direction of the vertical light exit surface 224b, and does not deliberately shape the light guide plate 224. Make a restriction. 12 200912465 P060206St5ZUW 21124twf.doc/p Fig. 3D is a schematic cross-sectional view showing still another light-emitting unit of the first embodiment of the present invention. Referring to FIG. 3D, the light reflecting plate 224, the light reflecting surface 224, a is a slope having a total reflection characteristic, and the light reflecting surface 224, a is inclined as long as the light L5 can be approximated to the vertical light emitting surface 224, b. The direction of reflection can be. In practice, the degree of tilt of the light reflecting surface 224'a can be known by calculation. In order to further ensure the collimation of the light source, as shown in FIG. 3E, the light emitting unit 220c of the present invention may further include a conventional light guiding element 226, and the light guiding element 226 is a light source 222 (light emitting diode). Most of the light rays are emitted in parallel to the horizontally laterally directed lens. The light guiding element 226 can be disposed between the light source 222 and the light guide plate 224' by a groove G4 in the light guide plate 224'. The light guiding element 226 is adapted to guide the light emitted by the light source 222 to the lateral direction to enter the light guide plate 224, and then reflects upward through the flat inclined light reflecting surface 224, a. On the other hand, in order to improve the brightness of the backlight module 200, as shown in FIG. 3F, the light-emitting unit 22〇d further increases the light source 222 and the corresponding light guiding element 226 to achieve the purpose. The second embodiment is similar to the first embodiment. The main difference between the two is that the illumination unit of the embodiment can be improved by setting a printing dot, a V-cut or a reflection sheet. The effect of light mixing and reflection of the light unit. Fig. 4 is a partial perspective view showing the light-emitting unit of the first embodiment of the present invention. Referring to FIG. 4, the light source in the light-emitting unit 23 of the present embodiment may include a red light-emitting diode, a green light-emitting diode, and a blue light-emitting diode to mix the required white light. In addition, a plurality of v-shaped grooves (v_cut) 23 200912465 i W 21124twf.doc/p p may be disposed on the light reflecting surface 224a of the light guiding plate 224 in the light emitting unit 23A. In general, the V-shaped groove p can be formed by imprinting on the surface of the light guide plate 224 via a mold. In practice, the V-shaped groove P has the function of reflecting and adjusting the direction of the light path.
具體而言，燈源222所發出之光線L7可以透過V形 槽P之反射而沿X方向傳遞而與其他色光混光，以混合出 均勻之白光。然後，透過光反射面224a之反射，而將光線 L7以近似垂直光出射面224b之方向（Z方向）反射。這 p 樣一來，發光單元230不但具有均勻混光之功能，並能提 ^ 供準直性良好之光源。值得一提的是，由於光線是利用X 方向的空間進行混光，因此發光單元230之整體厚度（Z 方向）可有效縮減。 此外’導光板224之底面上也可設有多個印刷網點 (dot) D。一般而言，印刷網點是選用本身具有高反射率 特性的顏料例如是氧化鈦（TI〇2)製作而成。因此，光線 L7可透過印刷網點D之反射而沿X方向與其他色光混 光’以混合出均勻的白光。另一方面，為了提升光線之使 U 用率，上述發光單元230内更可於導光板224之底面設置 反射片R，以進一步提升光線之反射效率。 第三實施例 圖5是本發明之第三實施例之液晶顯示器之示意圖。 請參考圖5，本發明之液晶顯示器400包括上述之背光模 組200與一液晶顯示面板300。其中，背光模組200之結 構已清楚揭露於第一實施例中，而液晶顯示面板300配置 於背光模組200上方。一般液晶顯示面板300内會含有液 14 200912465 rν/υν/ζ,ν/υοο^ι J- »V 21124twf.doc/p 晶LC，以控制背光模組200所發出之光線能否通過液晶顯 示面板300。值得注意的是，本發明之液晶顯示器400更 包括一擴散膜片310，其配置於液晶顯示面板300遠離背 光才吴組200之一面上。 由於本發明之背光模組200可以提供液晶顯示面板 300高準直性之光源，因此通過液晶顯示面板3〇〇之光線 L8與L9會有一致的光程差。換言之，通過液晶顯示面板 300之光線L8與L9會有一致的亮度，因此本發明之液晶 顯示面板300能有效改善習知之液晶顯示面板1〇〇(如圖2 所示）因視角變化而產生的色偏問題。這裡要特別說明的 是’通過液晶顯示面板3〇〇之光線L8與L9會經由擴散膜 片310而均勻地散射，而使顯示晝面有良好的可視角。當 然本發明之液晶顯示面板3〇〇都可分別藉由本發明之發 光單元220a、220b、220c、220d與230，而具有良好的^ 學顯示特性。 〇 一綜上所述，本發明之背光模組因具有沿第一方向蛊第 二方向陣列排列的發光單S。因此’本發明之t光模每 =有兩個維度的掃描方向，進而可有效提升晝面之顯示品 二二之發光單元可藉由稜鏡片與印刷網點來增 此先先私（X方向），因此背光模組之厚度（2方 可有效縮減。本發明之背光模組 J性之光源。因此，本發明之液晶顯示器;有:改】;準 = 產生的色偏現象，進而能提升顯^ 15 200912465 ruo^vuoo^i x 2I124twf.doc/p 雖然本發明已以較佳實施例揭露如上，然其 限定本發明，任何所屬技術領域巾财、識者 所界定者 =Γ精神;範圍内’當可作些許之心^ 發明之保5蒦範圍當視後附之申請專利範圍 為準。 【圖式簡單說明】 ,-fjA是1知—發光二極體的掃描式直下式背光模組 -不思圖。 圖是習知一側邊式背光模組之示意圖。 圖2是習知液晶顯示器之局部示意圖。 圖3A是本發明第一實施例之背光模组示意圖。 圖3B是本發明第一實施例之發光單元之剖面示意 圖3C是本發明第一實施例之另一發光單元之 意圖。 圖3D是本發明第一實施例之又—發光單元之剖面示 D 意圖。 圖3E是本發明第一實施例之再一發光單元之剖面示 意圖。 圖3F是本發明第一實施例之高亮度之發光單元之剖 面示意圖。 圖4是本發明第二實施例之發光單元之局部立體示意 圖。 、 圖5是本發明之第三實施例之液晶顯示器之示意圖。 16 200912465 ruouzuobtsz, i i 21124twf.doc/p 【主要元件符號說明】 110、110’、200 :背光模組 112、 112’、210 :燈箱 113、 113’ ：光源條 114、 114’ ：發光二極體 115、 224、224’ ：導光板 120 .液晶顯不面板 100 .液晶顯不斋 220、220a、220b、220c、220d、230 :發光單元 222 :燈源 224a、224’a :光反射面 224b、224’b :光出射面 226、226’ ：光導引元件 300 .液晶顯不面板 310 :擴散膜片 400 ·液晶顯不斋 D:印刷網點 D1 :第一方向 D2 :第二方向 F :焦點處 G卜 G2、G3、G4 :凹槽 L卜 L2、L3、L4、L5、L6、L7、L8、L9 :光線 LC .液晶 P : V形槽 I、II、III、IV :掃描區域 17Specifically, the light L7 emitted from the light source 222 can be transmitted in the X direction through the reflection of the V-shaped groove P to be mixed with other color lights to mix uniform white light. Then, the light ray L7 is reflected by the reflection of the light reflecting surface 224a in the direction (Z direction) which is approximately the vertical light emitting surface 224b. In this way, the light-emitting unit 230 not only has the function of uniformly mixing light, but also provides a light source with good collimation. It is worth mentioning that since the light is mixed by the space in the X direction, the overall thickness (Z direction) of the light emitting unit 230 can be effectively reduced. Further, a plurality of printing dots D may be provided on the bottom surface of the light guide plate 224. In general, the printing dots are made of a pigment having a high reflectance characteristic, for example, titanium oxide (TI〇2). Therefore, the light L7 can be mixed with other color light in the X direction by the reflection of the printing dot D to mix uniform white light. On the other hand, in order to increase the U-utility of the light, the light-emitting unit 230 can further provide a reflection sheet R on the bottom surface of the light guide plate 224 to further improve the reflection efficiency of the light. Third Embodiment Fig. 5 is a view showing a liquid crystal display of a third embodiment of the present invention. Referring to FIG. 5, the liquid crystal display 400 of the present invention comprises the above-described backlight module 200 and a liquid crystal display panel 300. The structure of the backlight module 200 is clearly disclosed in the first embodiment, and the liquid crystal display panel 300 is disposed above the backlight module 200. Generally, the liquid crystal display panel 300 may contain liquid 14 200912465 rν/υν/ζ, ν/υοο^ι J- »V 21124twf.doc/p crystal LC to control whether the light emitted by the backlight module 200 can pass through the liquid crystal display panel. 300. It should be noted that the liquid crystal display 400 of the present invention further includes a diffusion film 310 disposed on one side of the liquid crystal display panel 300 away from the backlight assembly 200. Since the backlight module 200 of the present invention can provide a light source with high collimation of the liquid crystal display panel 300, the light beams L8 and L9 passing through the liquid crystal display panel 3 have a uniform optical path difference. In other words, the light beams L8 and L9 of the liquid crystal display panel 300 have the same brightness. Therefore, the liquid crystal display panel 300 of the present invention can effectively improve the conventional liquid crystal display panel 1 (shown in FIG. 2) due to the change of the viewing angle. Color shift problem. It is to be noted here that the light beams L8 and L9 passing through the liquid crystal display panel 3 are uniformly scattered through the diffusion film 310, so that the display pupil surface has a good viewing angle. Of course, the liquid crystal display panel 3 of the present invention can have good display characteristics by the light-emitting units 220a, 220b, 220c, 220d and 230 of the present invention, respectively. In summary, the backlight module of the present invention has a light-emitting sheet S arranged in an array in a second direction along the first direction. Therefore, the optical mode of the present invention has a scanning direction of two dimensions, thereby effectively improving the display of the surface of the light. The light-emitting unit of the second surface can be increased by the slap and the printed dot (X direction). Therefore, the thickness of the backlight module can be effectively reduced. The backlight module of the present invention has a light source. Therefore, the liquid crystal display of the present invention has: a modification; 。 。 。 。 。 。 。 。 。 。 Can make a little heart ^ The scope of the invention 5 当 当 后 后 。 。 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 Figure 2 is a partial schematic view of a conventional liquid crystal display. Figure 3A is a schematic view of a backlight module according to a first embodiment of the present invention. Figure 3B is a first embodiment of the present invention. Schematic diagram of the light emitting unit of the embodiment 3 C is the intention of another illuminating unit according to the first embodiment of the present invention. Fig. 3D is a cross-sectional view of the illuminating unit of the first embodiment of the present invention. Fig. 3E is a further illuminating unit of the first embodiment of the present invention. Figure 3F is a schematic cross-sectional view of a high-intensity light-emitting unit according to a first embodiment of the present invention. Figure 4 is a partial perspective view of a light-emitting unit according to a second embodiment of the present invention. Figure 5 is a third embodiment of the present invention. A schematic diagram of a liquid crystal display. 16 200912465 ruouzuobtsz, ii 21124twf.doc/p [Description of main component symbols] 110, 110', 200: backlight modules 112, 112', 210: light boxes 113, 113': light source strip 114, 114': light-emitting diodes 115, 224, 224': light guide plate 120. liquid crystal display panel 100. liquid crystal display fast 220, 220a, 220b, 220c, 220d, 230: light-emitting unit 222: light source 224a, 224' a : light reflecting surface 224b, 224'b: light emitting surface 226, 226': light guiding element 300. liquid crystal display panel 310: diffusion film 400 · liquid crystal display not fast D: printing dot D1: first direction D2 : second direction F: focus G Bu G2, G3, G4: Groove L Bu L2, L3, L4, L5, L6, L7, L8, L9: Light LC. Liquid crystal P: V-groove I, II, III, IV: Scanning area 17