Ι258554_/〇〇6 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種背光模組(backlight module)與液 晶顯示器（liquid crystal display, LCD)，且特別是有關於一 種可調整面光源之色溫的背光模組與具有此種背光模組之 液晶顯示器。 【先前技術】 隨著電腦性能的大幅進步以及網際網路、多媒體技 術的高度發展，目前影像資訊的傳遞大多已由類比傳輸轉 為數位傳輸。為了配合現代生活模式，視訊或影像裝置之 體積日漸趨於輕薄。雖然傳統之陰極射線管(Cathode Ray Tube，CRT)顯示器仍有其優點，但是由於其内部電子腔的 結構’使得顯示器體積龐大而且佔空間，並且在輸出影像 時具有輻射線傷眼等問題。因此，配合光電技術與半導體 製造技術所發展之平面式顯示器（Flat Panel Display， FPD)，例如液晶顯示器(Liquid Crystal Display, LCD)、有 機電激發光顯示器（Organic Electro_Luminescent Display， 0ELD)或是電漿顯示器(Plasma Display Panel，PDP)，已逐 漸成為顯示器產品之主流。 液晶顯示器依其光源利用型態可略分為反射式液晶 顯示态（Reflective LCD)、穿透式液晶顯示器（Transmissive LCD)以及半穿透半反射式液晶顯示器三種，其中穿透式 或是半穿透半反射式的液晶顯示器，主要係由一液晶面板 1258554 15240twf.doc/006 及月光拉組所構成。液晶面板係由兩片 M、此液日日面板所需之面光源，以使液晶顯示器達 示的效果。-般來說，背光模組大致上可分為直下^ (Dlrect_Type)與側邊入光式兩種。 △刀圖1A繪不為習知直下式背光模組之剖面示意圖。請 ί,、、、圖1A㊂知直下式背光模組i〇〇a主要包括一燈箱 110、複數個冷陰極螢光燈管（c〇ld Cath〇de Flu〇rescenceΙ258554_/〇〇6 IX. Description of the Invention: [Technical Field] The present invention relates to a backlight module and a liquid crystal display (LCD), and more particularly to an adjustable surface A backlight module having a color temperature of a light source and a liquid crystal display having the backlight module. [Prior Art] With the dramatic advancement of computer performance and the high development of Internet and multimedia technologies, most of the current image information transmission has been transferred from analog transmission to digital transmission. In order to cope with the modern lifestyle, the size of video or video devices is becoming thinner and lighter. Although the conventional cathode ray tube (CRT) display still has its advantages, the structure of the internal electron cavity makes the display bulky and takes up space, and has problems such as radiation damage when outputting an image. Therefore, a flat panel display (FPD) developed by optoelectronic technology and semiconductor manufacturing technology, such as a liquid crystal display (LCD), an organic electro-luminescence display (OLED), or a plasma The display (Plasma Display Panel, PDP) has gradually become the mainstream of display products. According to the light source utilization mode, the liquid crystal display can be roughly classified into a reflective liquid crystal display (Reflective LCD), a transmissive liquid crystal display (Transmissive LCD), and a transflective liquid crystal display, in which a transmissive or a semi-transparent liquid crystal display is used. The transflective liquid crystal display is mainly composed of a liquid crystal panel 1252854 15240twf.doc/006 and a moonlight pull group. The liquid crystal panel consists of two pieces of M, the surface light source required for this liquid day and day panel, so that the liquid crystal display can achieve the effect. In general, the backlight module can be roughly divided into two types: Drect_Type and Side Into. FIG. 1A is a schematic cross-sectional view of a conventional direct type backlight module. Please, ί, ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Lamp’ CCFL)120、一擴散板(Diffusion piate)13〇 以及光學Lamp' CCFL) 120, a diffusion plate (Diffusion piate) 13 〇 and optical
膜片140。其中，冷陰極螢光燈管12〇係配置於燈箱HQ 内，且冷陰極螢光燈管12〇所發出之光線會在燈箱110内 初步混光，並通過擴散板130與光學膜片140，以提供一 面光源。 圖1B繪示為習知側邊入光式背光模組之剖面示意 圖。請參照圖1B，侧邊入光式背光模組100b主要係由導 光板15〇、一冷陰極螢光燈管12〇、一燈罩16〇以及光學 膜片140所組成。其中，導光板15〇具有一光入射面152 與光出射面154，而冷陰極螢光燈管12〇係配置於導光 板150的光入射面152旁，且位於燈罩16〇内。另外，光 學膜片140係配置於導光板丨5〇的光出射面154上。 由圖1B可知，冷陰極螢光燈管12〇所發出的光線會 先經過燈罩160反射或是直接從光入射面152進入導光板 150中，並經由導光板15〇的光出射面154出射，其中導 光板150之作用係將陰極螢光燈管12〇所發出的線光源轉 !258554_/〇〇6 變成面光源。 上述兩種背光模組的冷陰極螢光燈管係提供一白光 光源以作為顯示之用，且此白光光源通常會因其色溫的不 同，而帶給人眼不同的視覺感受。舉例而言，當白光光源 之色溫較高時，則會造成顯示晝面偏藍的情形，而當白光 光源之色溫較低時，則會使得顯示晝面偏黃，因此隨著客 戶端之視覺喜好的不同，通常需調整背光光源至不同的色 溫0 更詳細地說，若需要較高色溫的顯示（白光）光源時， 則例如必須提高冷陰極螢光燈管之藍色螢光粉的比例，來 增加光源的色溫。然而，此種作法會相對降低冷陰極螢光 燈管的發光效率，進而影響背光模組所提供的面光源之亮 度。換言之，習知此種背光模組不僅無法對其輪出之顯示 光源的色溫進行㈣的調整，且即使更換不同成分的^ :螢光燈管也將犧牲顯示光源的亮度，並導致製作成：： 【發明内容】 為明的目的就是在提供—種背光模組，龙 敕先挺 主要係藉由一主光源組搭配一& π ^ 可提供較佳之心=如光源之色溫與亮度的調整，並 入#3:4的又-目的是提供-種背光模組， 先式月光模叙，主要係藉由-主光源搭配至i巧邊 一入光 1258554 15240twf.doc/006 源，以同時兼顧顯示光源之色溫與亮度的調整，並可提供 較佳之顯示品質。 本發明的另一目的是在提供一種背光模組，其主要 係藉由一冷陰極螢光燈管搭配至少一發光二極體，以同時 兼顧顯示光源之色溫與亮度的調整。 本發明的再一目的是在提供一種液晶顯示器，其係 藉由一可同時兼顧顯示光源之色溫與亮度的調整之背光模 組，以提高顯示品質。 、 基於上述與其他目的，本發明提出一種背光模組，其 包括一燈箱、一主光源組、一色溫調整光源組以及一擴散 板。其中，燈箱具有至少一開口，而擴散板配置於燈箱之 開口處附近。此外，主光源組與色溫調整光源組皆配置於 溫 燈箱内。另外，主光源組與色溫調整光源組所形成之色、 係不相同。 在上述之背光模組中，主光源組例如係位於色溫調 整光源組與擴散板之間。此外，主光源組例如係對應位於 色溫調整光源組之正上方。另外，主光源組與色溫^整光 源組例如係呈交替穿插配置。 在上述之背光模組中，例如更包括至少一 其係配置於擴散板上。 予膜片， 在上述之背光模組中，例如更包括一反射 盆 配置於燈箱底部。 ，、货、 …本發明又提出—種背光肋，其包括-導光板、一主 光源組以及至少-色溫調整光源組。其中，導光板具有一 1258554 15240twf.doc/006 光入射面與一光出射面。此外，主光源組與色溫調整光源 組皆配置於光入射面旁。另外，主光源組與色溫調整光源 組所形成之色溫係不相同。 在上述之月光模組中，例如更包括至少一燈罩，其 係配置於光入射面旁，且主光源組與色溫調整光源組係ς 於燈罩内。 在上述之背光模組中，例如更包括至少一光學膜片， 其係配置於導光板之光出射面旁。 本發明另提出一種背光模組，其適於提供一顯示光 源至一液晶顯示面板。此背光模組之特徵在於同時具有一 主光源組以及一色溫調整光源組，以藉由談色溫調整光源 組調製顯示光源之色溫。 ’、 "在上述這些背光模組中，主光源組例如係形成一白 光。此外，主光源組例如包括至少一冷陰極螢光燈管或至 少一發光二極體。另外，色溫調整光源組例如係選自至少 一藍光發光二極體、至少一紅光發光二極體、至少一綠光 务光一極體以及上述該等之組合其中之一。 （ 本發明再提出一種背光模組，其包括一燈箱、至少 一冷陰極螢光燈管與至少一發光二極體。其中，燈箱具^ 至=一開口，而冷陰極螢光燈管與發光二極體，係配置於 燈箱内。 、 在上述之背光模組中，冷陰極螢光燈管盘發光二極 體所形成之色溫例如係不相同。此外，冷陰極^燈;例 如係形成一白光。另外，發光二極體例如係選自至少一藍 1258554 15240twf.doc/006 光發光一極體、至少—紅光發光二極體、至少—綠光發光 二極體以及上述該等之組合其中之一。 本發明另提出一種液晶顯示器，其係由上述各種背 光模組其中一種與一液晶面板所組成。 “由於本發明之背光模組具有一主光源組與一色溫調 整光源組。其中，主光源組可提供足夠亮度的顯示光源， 而色溫調整光源組可用來調整顯示光源的色溫。因此，本 發明之为光模組可同時兼顧顯示光源之色溫與亮度的調 整，進而使得本發明之液晶顯示器在顯示暗畫面或較低灰 P白晝面日守，不容易有畫面偏藍的現象，以提供較佳的顯示 品質。 為讓本發明之上述和其他目的、特徵和優點能更明 顯易懂，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】 第一實施作j_ 圖2A與圖2B係繪示依照本發明第一實施例所述之 二種背光模組的結構剖面圖。請參照圖2A與圖2B，本 實施例之背光模組200為直下式背光模組，其包括一燈箱 210、一主光源組22〇、一色溫調整光源組23〇以及一擴 散板240。其中，燈箱210具有一開口 212，而擴散板240 配置於燈箱210之開口 212處。此外，主光源組220與色 溫調整光源組230皆配置於燈箱210内。 1258554 15240twf.doc/006 上述之背光模組200中，主光源組220係用以提供 一白光，此主光源組220例如包括一個或複數個冷陰極螢 光燈管222 (在圖2A與圖2B中係以複數個冷陰極燈管為 例）。當然，主光源組220亦可由其他可發出白光光源的 發光體所組成。此外，色溫調整光源組230例如包括一個 或複數個發光二極體232(在圖2A與圖2B中係以複數個 發光二極體為例）。這些發光二極體232例如是藍光發光 二極體、紅光發光二極體、綠光發光二極體或是上述這些 發光二極體的組合。以下將以藍光發光二極體為例進行說 明。 在第一實施例中，主光源組220係提供一白光光源， 而色溫調整光源組230係提供一藍光光源。此二種光源形 成背光模組200之顯示光源，其於燈箱21〇内混光後，會 經由擴散板240，以形成一亮度均勻的面光源。 值得注意的是，在本實施例中可於擴散板24〇上配 置至少一光學膜片，以使背光模組2〇〇所提供的顯示光源 之亮度更為均勻。此外，在背光模組2〇〇中，可於燈箱21〇 底部配置一反射片260，其可使主光源組220及色溫調整 光源組230所提供的光源更有效地反射至擴散板240，以 ^南月光才果組200的發光效率。 本發明第一實施例中，主光源組220例如係位於色 溫調整光源組230與擴散板24〇之間。更詳細地說，主光 源組220例如係對應位於色溫調整光源組230之正上方(如 圖2A所不），或是與色溫調整光源組230呈交替穿插配 11 1258554 15240twf.doc/006 置(如圖2B所示）。其中，當主光源组22〇對鹿位於 調整光源組230之正上方時，背光模組的混光效果= 佳。而當主光源組220與色溫調整光源組23〇呈交替穿插 配置時，背光模組20G的發光效率較佳。 本實施例之背光模組200 +，色溫調整光源植顶 所發出之單色光的色溫與主絲组22G的色溫不同，可用 以補償顯示光源之色溫’所以在需調整顯示光源之色溫 時，僅需調整色溫調整光源組230所顯示之單色光強产， 而不需變更冷陰極$光燈管222,因此不會影響整體^ 模組200之發光效率。換言之，本發明亦可使用較高二 效率之冷陰極螢光燈管222,並藉由藍光光源來維持^示 光源的色溫，以提供高亮度且色溫適當賴示光源。’ 承上述，在液晶顯示器顯示較低灰階晝面或是暗晝 面時，本實施例之背光模組200可藉由發光二極體232來 調整顯示光源之色溫’以使晝面不會有偏藍的現象。此外， 在液晶顯示器顯示局部較低灰階晝面或是局部暗畫面時， 更可依低灰階晝面或暗畫面的分佈區域，來調整對應這此 區域的發光二極體232之發光強度，以使低灰階晝面的灰 階更低’或是使畫面的灰階更接近於零。 值得注意的是，本實施例之色溫調整光源組23〇除 了如上述内容中所提及之藍光發光二極體外，亦可為其2 务光顏色之發光二極體。更詳細地說，本實施例之色溫調 整光源組230亦可為綠光發光二極體、紅光發光二極=了 綠光發光二極體搭配紅光發光二極體、綠光發光二極體搭 12 I258551,OC/006 配藍光發光二極體，或是藍光發光二極體搭配紅光發光二 極體等組合。 圖3繪示為冷陰極螢光燈管與發光二極體的調光信 號之波形圖。請同時參照圖2A、2B與3，其例如是藉由 脈衝旯頻调變(pulse wideband modulation，PWM)的調光方 式’來驅動背光模組200，其中冷陰極螢光燈管222的調 光4§號係以L1表示，而發光二極體232的調光信號係以 L2表示。在本實施例中，例如可藉由調整調光信號L2的 脈衝寬度d來改變發光二極體232的發光強度，進而調整 顯示光源的色溫。此外，值得一提的是，為避免啟動瞬間 之顯不光源之瞬間色溫不同，例如可使調光信號L1^ L2 在啟動時同步，以提供較為穩定之顯示光源。 第二實施例 圖4係繪示依照本發明第二實施例所述之一種背先 模組的結構剖面圖。請參照圖4，本實施例之背光模組3〇〇 例如是一單邊入光式的背光模組，其主要包括一導光板 310、一主光源組320以及一色溫調整光源組330。其中， 導光板310具有一光入射面312與一光出射面314，而主 光源組320與色溫調整光源組330係配置於導光板310之 一側，並位於光入射面312旁。 上述之背光模組300中，主光源組320例如是一冷 陰極螢光燈管。此外，色溫調整光源組33()例如是由至少 發光一極體332所組成，其例如是藍光發光二極體、紅 13 1258554 15240twf.doc/006 光發光^^查體、綠光發光二極體或是上述這些發光二極體 之組合其中之一。更詳細地說，此色溫調整光源組330更 例如可以是綠光發光二極體、紅光發光二極體、綠光發光 一極體搭配紅光發光二極體、綠光發光二極體搭配藍光發 光一極體’或是藍光發光二極體搭配紅光發光二極體等組 合。下文將以藍光發光二極體為例進行說明。 在弟'一貫施例中’主光源組320可發出白光，而色 溫調整光源組330係發出單色光(例如是藍光），且此白光 與單色光係由導光板310之光入射面312入射至導光板 310内，並在導光板310内混光後，再由光出射面gw出 射，以提供一均勻之面光源。此外，為使白光與單色光更 有效地入射導光板310，更可於主光源組32〇與色溫調整 光源組330外配置一燈罩340，以達到較佳的集光效果， 進而提高背光模組300發光效率。另外，導光板之光 出射面314旁更例如可配置至少一光學膜片35〇，以使顯 示光源的亮度更為均勻。 當然，除上述之單邊入光式的背光模組之外，本發 明更可以疋雙邊入光式之背光模組。請參考圖5，其綠示 依照本發明第二實施例所述之另—歸光模組的結構示意 圖。如圖5所示，在側邊入光式之背光模組·中，& 光板310a例如具有相對之二光入射面312，而複數個主 光源組320與色溫調整光源級33〇係分別配置於此二光入 射^犯产。_雙邊入光式之背光模組可較單邊入光式 之为光杈組提供更高亮度的顯示光源。 14 1258554 15240twf.doc/006 本發明第二實施例中，背光模組300、300a主要係 藉由主光源組320提供足夠亮度的顯示光源，並藉由色溫 調整光源組330調整顯示光源的色溫，因此可同時兼顧顯 示光源之党度與色溫。此外，關於背光模組300、300a之 驅動、調光方式或顯示光源之亮度與色溫的調整等細節， 清麥照上述第一實施例’在此不再資述。 第二實施例 圖6係繪示依照本發明第三實施例所述之一種液晶 顯示器的結構剖面圖。請參照圖6，本實施例之液晶顯示 器300包括一液晶面板310與一背光模組320。其中，背 光模組320係配置於液晶面板31〇之一側，以提供液晶面 板310所需之顯示光源322。此外，液晶面板310例如係 由一上基板312、一下基板314以及一液晶層316所組成。 另外，背光模組320為第一實施例與第二實施例所述之各 種可調整顯示光源之色溫的背光模組其中之一。 由於本實施例之液晶顯示器300所使用的背光模組 320為一種可調整顯示光源322之色溫的背光模組，所以 在顯示暗晝面或較低灰階晝面時，不容易有晝面偏藍的現 象。因此，本實施例之液晶顯示器3〇〇可以提供較佳的顯 不品質 〇 综上所述，本發明之背光模組同時具有一主光源組 以及一色溫調整光源組。主光源組主要係提供足夠亮度的 顯不光源，而色溫調整光源組係調製顯示光源之色溫。因 15 1258554 15240twf.doc/006 :調Ϊ發明之背光模組可同時兼顧顯示光源之亮度與色溫 此外，㈣切kg顯示 色溫的調整之軸 Ι Ϊ 2灰面時’不容易出現晝面偏藍的現象。因 本U之液日Β顯示器可提供較佳的顯示品質。 以限iitr任已Λ較佳實施例揭露如上，然其並非用 神和範圍〗，|可=$此技*者’在不脫離本發明之精 闽圍内田了作些許之更動與潤飾，因此本發明之保 護耗圍當視後附之申請專利範圍所界定者=本U之保 【圖式簡單說明】 ΓΓΛ示\習知直下式背光模組之剖面示意圖。 圖。3 ^為習知側邊人光式背光模组之剖面示意 圖2A與圖沈係綠示依 —種背光模_結構剖面圖。 Μ心例所逑之 號之二3圖繪示為冷陰極榮光燈管與發光二極體的調光信 種背 模組的圖結4構財發料二實施_述之-種背先 光模===財發㈣二餘騎述之另一 圖6得身示依照本發明第三實_所述之— 種液 曰曰 16 1258554 15240twf.doc/006 顯示器的結構剖面圖。 【主要元件符號說明】 100a、100b、100c、200、300、300a :背光模組 110、210 ··燈箱 120、222 :冷陰極螢光燈管 130、240 :擴散板 140、250、350 :光學膜片 150、310、310a :導光板 152、312 :光入射面 154、314 :光出射面 160、340 ··燈罩 170、232、332 :發光二極體 212 :開口 220、320 :主光源組 230、330 :色溫調整光源組 260 :反射片 300 :液晶顯示器 310 ·液晶面板 312 :上基板 314 :下基板 316 :液晶層 320 ··背光模組 322 :顯示光源 U、L2 :調光信號Diaphragm 140. The cold cathode fluorescent lamp tube 12 is disposed in the light box HQ, and the light emitted by the cold cathode fluorescent tube 12 is preliminarily mixed in the light box 110, and passes through the diffusion plate 130 and the optical film 140. To provide a side light source. FIG. 1B is a schematic cross-sectional view of a conventional side-lit backlight module. Referring to FIG. 1B, the side-lit backlight module 100b is mainly composed of a light guide plate 15A, a cold cathode fluorescent tube 12A, a lamp cover 16A, and an optical film 140. The light guide plate 15A has a light incident surface 152 and a light exit surface 154, and the cold cathode fluorescent tube 12 is disposed beside the light incident surface 152 of the light guide plate 150 and located in the lamp cover 16A. Further, the optical film 140 is disposed on the light exit surface 154 of the light guide plate 丨5〇. As can be seen from FIG. 1B, the light emitted by the cold cathode fluorescent lamp 12 反射 is reflected by the lamp cover 160 or directly enters the light guide plate 150 from the light incident surface 152 and exits through the light exit surface 154 of the light guide plate 15 . The function of the light guide plate 150 is to turn the line light source 258554_/〇〇6 emitted by the cathode fluorescent tube 12 into a surface light source. The cold cathode fluorescent lamp of the above two backlight modules provides a white light source for display, and the white light source usually has different visual perceptions due to different color temperatures. For example, when the color temperature of the white light source is high, it will cause the display surface to be bluish, and when the color temperature of the white light source is low, the display surface will be yellowish, so with the vision of the client. The preference is usually to adjust the backlight source to a different color temperature. In more detail, if a higher color temperature display (white light) source is required, for example, the proportion of blue phosphor powder in the cold cathode fluorescent tube must be increased. To increase the color temperature of the light source. However, this method relatively reduces the luminous efficiency of the cold cathode fluorescent lamp, thereby affecting the brightness of the surface light source provided by the backlight module. In other words, it is known that such a backlight module can not only adjust (4) the color temperature of the display light source that is turned on, and even if the fluorescent tube of different components is replaced, the brightness of the display light source will be sacrificed, and the result is: [Invention] The purpose of the invention is to provide a backlight module. The main function of the dragon is to provide a better heart = a color temperature and brightness adjustment of the light source by using a main light source group with a & π ^ Incorporating #3:4 again - the purpose is to provide a kind of backlight module, the first-form moonlight model, mainly by - the main light source is matched to the i-edge side into the light 1258554 15240twf.doc/006 source, at the same time It also adjusts the color temperature and brightness of the display light source and provides better display quality. Another object of the present invention is to provide a backlight module which is mainly provided by a cold cathode fluorescent lamp with at least one light emitting diode to simultaneously adjust the color temperature and brightness of the display light source. It is still another object of the present invention to provide a liquid crystal display which is improved in display quality by a backlight module which can simultaneously adjust the color temperature and brightness of the display light source. Based on the above and other objects, the present invention provides a backlight module including a light box, a main light source group, a color temperature adjustment light source group, and a diffusion plate. Wherein the light box has at least one opening, and the diffuser plate is disposed near the opening of the light box. In addition, the main light source group and the color temperature adjustment light source group are all disposed in the temperature light box. In addition, the colors formed by the main light source group and the color temperature adjustment light source group are different. In the above backlight module, the main light source group is, for example, located between the color temperature adjustment light source group and the diffusion plate. In addition, the main light source group corresponds, for example, directly above the color temperature adjustment light source group. In addition, the main light source group and the color temperature control light source group are, for example, alternately interposed. In the backlight module described above, for example, at least one of the backlight modules is disposed on the diffusion plate. In the above backlight module, for example, a reflective basin is disposed at the bottom of the light box. The invention further proposes a backlight rib comprising a light guide plate, a main light source group and at least a color temperature adjustment light source group. Wherein, the light guide plate has a light incident surface and a light exit surface of 1258554 15240 twf.doc/006. In addition, the main light source group and the color temperature adjusting light source group are disposed beside the light incident surface. In addition, the color temperature formed by the main light source group and the color temperature adjusting light source group is different. In the above-mentioned moonlight module, for example, at least one lamp cover is further disposed, which is disposed beside the light incident surface, and the main light source group and the color temperature adjusting light source group are disposed in the lamp cover. In the above backlight module, for example, at least one optical film is disposed, which is disposed beside the light exit surface of the light guide plate. The invention further provides a backlight module adapted to provide a display light source to a liquid crystal display panel. The backlight module is characterized in that it has a main light source group and a color temperature adjustment light source group at the same time to modulate the color temperature of the display light source by adjusting the color temperature adjustment light source group. In the backlight modules described above, the main light source group forms, for example, a white light. Further, the main light source group includes, for example, at least one cold cathode fluorescent lamp or at least one light emitting diode. Further, the color temperature adjusting light source group is selected, for example, from at least one of a blue light emitting diode, at least one red light emitting diode, at least one green light light one, and a combination of the above. The invention further provides a backlight module, comprising a light box, at least one cold cathode fluorescent tube and at least one light emitting diode, wherein the light box has an opening, and the cold cathode fluorescent tube and the light emitting The diodes are disposed in the light box. In the backlight module described above, the color temperature formed by the LEDs of the cold cathode fluorescent tube disk is different, for example. In addition, the cold cathode lamp; for example, forms a In addition, the light-emitting diode is, for example, selected from at least one blue 1258554 15240 twf.doc/006 light-emitting diode, at least a red light-emitting diode, at least a green light-emitting diode, and combinations thereof. The present invention further provides a liquid crystal display, which is composed of one of the above various backlight modules and a liquid crystal panel. "The backlight module of the present invention has a main light source group and a color temperature adjusting light source group. The main light source group can provide a display light source with sufficient brightness, and the color temperature adjustment light source group can be used to adjust the color temperature of the display light source. Therefore, the optical module of the present invention can simultaneously consider the color temperature of the display light source. The adjustment of the brightness, in turn, causes the liquid crystal display of the present invention to display a dark picture or a lower gray P white surface, and it is not easy to have a phenomenon that the picture is bluish to provide better display quality. To make the above and other aspects of the present invention The objects, features, and advantages will be more apparent and understood. The following detailed description of the preferred embodiments, together with the accompanying drawings, will be described in detail below. [Embodiment] The first embodiment is shown in FIG. 2A and FIG. The structure of the backlight module of the first embodiment is shown in FIG. 2A and FIG. 2B. The backlight module 200 of the embodiment is a direct-lit backlight module, which includes a light box 210 and a main light source. The group 22 〇, a color temperature adjusting light source group 23 〇 and a diffusion plate 240. The light box 210 has an opening 212, and the diffusion plate 240 is disposed at the opening 212 of the light box 210. In addition, the main light source group 220 and the color temperature adjusting light source group 230 is disposed in the light box 210. 1258554 15240twf.doc/006 In the backlight module 200 described above, the main light source group 220 is used to provide a white light, and the main light source group 220 includes, for example, one or a plurality of cold cathode fluorescent lamps. The tube 222 is exemplified by a plurality of cold cathode lamps in FIGS. 2A and 2B. Of course, the main light source group 220 may also be composed of other illuminants capable of emitting a white light source. Further, the color temperature adjusting light source group 230 includes, for example. One or a plurality of light-emitting diodes 232 (exemplified by a plurality of light-emitting diodes in FIGS. 2A and 2B). These light-emitting diodes 232 are, for example, blue light-emitting diodes, red light-emitting diodes, A green light emitting diode or a combination of the above light emitting diodes. Hereinafter, a blue light emitting diode will be described as an example. In the first embodiment, the main light source group 220 provides a white light source, and the color temperature is adjusted. Light source group 230 provides a blue light source. The two light sources form a display light source of the backlight module 200. After being mixed in the light box 21, the light source passes through the diffusion plate 240 to form a surface light source with uniform brightness. It should be noted that in the embodiment, at least one optical film can be disposed on the diffusion plate 24A to make the brightness of the display light source provided by the backlight module 2〇〇 more uniform. In addition, in the backlight module 2, a reflective sheet 260 can be disposed on the bottom of the light box 21〇, which can reflect the light source provided by the main light source group 220 and the color temperature adjustment light source group 230 to the diffusion plate 240 more effectively. ^ Luminous efficiency of the South Moonlight Group 200. In the first embodiment of the present invention, the main light source group 220 is located, for example, between the color temperature adjustment light source group 230 and the diffusion plate 24A. In more detail, the main light source group 220 is correspondingly located directly above the color temperature adjusting light source group 230 (as shown in FIG. 2A) or alternately inserted with the color temperature adjusting light source group 230 (1, 1 258,554, 15240 twf.doc/006). As shown in Figure 2B). Wherein, when the main light source group 22 is located directly above the adjustment light source group 230, the light mixing effect of the backlight module is better. When the main light source group 220 and the color temperature adjusting light source group 23 are alternately interposed, the backlight module 20G has better luminous efficiency. In the backlight module 200+ of the embodiment, the color temperature of the monochromatic light emitted by the top of the color temperature adjusting light source is different from the color temperature of the main wire group 22G, and can be used to compensate the color temperature of the display light source. Therefore, when the color temperature of the display light source needs to be adjusted, It is only necessary to adjust the monochromatic light intensity displayed by the color temperature adjusting light source group 230 without changing the cold cathode light tube 222, so that the luminous efficiency of the overall module 200 is not affected. In other words, the present invention can also use a higher efficiency second cold cathode fluorescent lamp 222, and maintain the color temperature of the light source by a blue light source to provide high brightness and a suitable color temperature for the light source. In the above, when the liquid crystal display displays a lower gray scale or a dark surface, the backlight module 200 of the embodiment can adjust the color temperature of the display light source by the light emitting diode 232 so that the surface does not There is a bluish phenomenon. In addition, when the liquid crystal display displays a local lower gray scale surface or a partial dark image, the light intensity of the light emitting diode 232 corresponding to the region can be adjusted according to the distribution area of the low gray scale surface or the dark image. So that the gray level of the low gray level surface is lower 'or make the gray level of the picture closer to zero. It should be noted that the color temperature adjusting light source group 23 of the present embodiment can eliminate the blue light emitting diode as mentioned in the above, and can also be a light emitting diode of its two colors. In more detail, the color temperature adjusting light source group 230 of the embodiment may also be a green light emitting diode, a red light emitting diode, a green light emitting diode, a red light emitting diode, and a green light emitting diode. The body is equipped with 12 I258551, OC/006 with blue light emitting diode, or a combination of blue light emitting diode and red light emitting diode. Fig. 3 is a waveform diagram showing dimming signals of a cold cathode fluorescent lamp and a light emitting diode. Referring to FIG. 2A, FIG. 2B and FIG. 3 simultaneously, the backlight module 200 is driven by, for example, a pulse width modulation (PWM) dimming mode, wherein the dimming of the cold cathode fluorescent tube 222 is performed. The § number is indicated by L1, and the dimming signal of the illuminating diode 232 is represented by L2. In the present embodiment, for example, the light emission intensity of the light-emitting diode 232 can be changed by adjusting the pulse width d of the dimming signal L2, thereby adjusting the color temperature of the display light source. In addition, it is worth mentioning that, in order to avoid different instantaneous color temperatures of the display light source, for example, the dimming signal L1^L2 can be synchronized at the startup to provide a relatively stable display light source. Second Embodiment FIG. 4 is a cross-sectional view showing the structure of a back module according to a second embodiment of the present invention. Referring to FIG. 4, the backlight module 3 of the present embodiment is, for example, a single-edge light-emitting backlight module, which mainly includes a light guide plate 310, a main light source group 320, and a color temperature adjustment light source group 330. The light guide plate 310 has a light incident surface 312 and a light exit surface 314, and the main light source group 320 and the color temperature adjustment light source group 330 are disposed on one side of the light guide plate 310 and are located beside the light incident surface 312. In the above backlight module 300, the main light source group 320 is, for example, a cold cathode fluorescent lamp. In addition, the color temperature adjusting light source group 33 () is composed of, for example, at least a light emitting body 332, which is, for example, a blue light emitting diode, red 13 1258554 15240 twf.doc/006 light emitting ^^ checking body, green light emitting diode One of the combinations of these light-emitting diodes. In more detail, the color temperature adjusting light source group 330 can be, for example, a green light emitting diode, a red light emitting diode, a green light emitting body, a red light emitting diode, and a green light emitting diode. A blue light emitting diode or a combination of a blue light emitting diode and a red light emitting diode. Hereinafter, a blue light emitting diode will be described as an example. In the 'conventional application', the main light source group 320 can emit white light, and the color temperature adjusting light source group 330 emits monochromatic light (for example, blue light), and the white light and the monochromatic light are transmitted from the light incident surface 312 of the light guide plate 310. The light is incident on the light guide plate 310 and mixed in the light guide plate 310, and then emitted from the light exit surface gw to provide a uniform surface light source. In addition, in order to make the white light and the monochromatic light enter the light guide plate 310 more effectively, a lamp cover 340 can be disposed outside the main light source group 32 〇 and the color temperature adjustment light source group 330 to achieve a better light collecting effect, thereby improving the backlight mode. Group 300 luminous efficiency. In addition, at least one optical film 35A may be disposed beside the light exit surface 314 of the light guide plate to make the brightness of the display light source more uniform. Of course, in addition to the unilateral light-incorporating backlight module described above, the present invention can also be used as a bilateral light-incorporating backlight module. Please refer to FIG. 5, which is a schematic view showing the structure of another homing module according to the second embodiment of the present invention. As shown in FIG. 5, in the side-lit backlight module, the & light panel 310a has, for example, two opposite light incident surfaces 312, and the plurality of main light source groups 320 and the color temperature adjusting light source levels 33 are respectively configured. In this case, the two light incidents are produced. _ Bilateral light-incorporated backlight module can provide higher brightness display light source than single-edge light-in-light mode. In the second embodiment of the present invention, the backlight modules 300 and 300a mainly provide a display light source with sufficient brightness by the main light source group 320, and adjust the color temperature of the display light source by the color temperature adjustment light source group 330. Therefore, the party degree and color temperature of the display light source can be simultaneously considered. Further, regarding the driving of the backlight modules 300, 300a, the dimming method, or the adjustment of the brightness and color temperature of the display light source, the first embodiment of the present invention will not be described here. SECOND EMBODIMENT Fig. 6 is a cross-sectional view showing the structure of a liquid crystal display according to a third embodiment of the present invention. Referring to FIG. 6, the liquid crystal display device 300 of the present embodiment includes a liquid crystal panel 310 and a backlight module 320. The backlight module 320 is disposed on one side of the liquid crystal panel 31 to provide a display light source 322 required for the liquid crystal panel 310. Further, the liquid crystal panel 310 is composed of, for example, an upper substrate 312, a lower substrate 314, and a liquid crystal layer 316. In addition, the backlight module 320 is one of the backlight modules of the first embodiment and the second embodiment that can adjust the color temperature of the display light source. Since the backlight module 320 used in the liquid crystal display device 300 of the present embodiment is a backlight module capable of adjusting the color temperature of the display light source 322, it is not easy to face the surface when displaying the dark surface or the lower gray scale surface. The phenomenon of blue. Therefore, the liquid crystal display device 3 of the present embodiment can provide better display quality. In summary, the backlight module of the present invention has both a main light source group and a color temperature adjustment light source group. The main light source group mainly provides a display light source of sufficient brightness, and the color temperature adjustment light source group modulates the color temperature of the display light source. Because 15 1258554 15240twf.doc/006: The backlight module of the invention can simultaneously consider the brightness and color temperature of the display light source. In addition, (4) the axis of the adjustment of the display color temperature Ι Ϊ 2 when the gray surface is not easy to appear blue The phenomenon. This U-liquid daylight display provides better display quality. In the preferred embodiment, it is disclosed in the above preferred embodiment. However, it is not the use of the god and the scope, and the product can be modified and retouched without departing from the essence of the present invention. The protection of the present invention is defined by the scope of the patent application attached to the scope of the application. The protection of the present invention is as follows: [Simplified description of the drawing] The schematic diagram of the conventional backlight module is shown. Figure. 3 ^ is a cross-sectional view of a conventional side human-light backlight module. FIG. 2A and FIG. Figure 2 of the Μ 例 例 绘 绘 绘 3 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷 冷MOD=== 财发(四)二余骑说 Another Figure 6 shows a structural cross-sectional view of the display according to the third embodiment of the present invention - a liquid raft 16 1258554 15240 twf.doc/006. [Main component symbol description] 100a, 100b, 100c, 200, 300, 300a: backlight module 110, 210 · · light box 120, 222: cold cathode fluorescent lamp 130, 240: diffusion plate 140, 250, 350: optical Diaphragm 150, 310, 310a: light guide plates 152, 312: light incident surfaces 154, 314: light exit surfaces 160, 340 · · lampshades 170, 232, 332: light emitting diode 212: openings 220, 320: main light source group 230, 330: color temperature adjustment light source group 260: reflection sheet 300: liquid crystal display 310, liquid crystal panel 312: upper substrate 314: lower substrate 316: liquid crystal layer 320 · backlight module 322: display light source U, L2: dimming signal