201104316 六、發明說明： ，* 【發明所屬之技術領域】 本發明是有關於一種液晶顯示裝置及其背光模組，且 特別是有關於一種以彩色濾光片基板過濾部分光源之液 晶顯示裝置及其背光模組。 【先前技術】 隨著顯示科技的發展’各式顯示裝置不斷推陳出新。 以液晶顯示裝置為例’請參照第1圖，其繪示一種傳統液 晶顯示裝置之示意圖。液晶顯示裝置900包括一顯示面板 910及一背光模組920。顯示面板91〇包括一彩色濾光片 基板912、一薄膜電晶體基板914及一液晶層913。液晶 層913係設置於彩色濾光片基板912及薄膜電晶體基板 914之間。背光模組920包括一光源923。光源923用以 提供一可見光（波長範圍落於380〜780奈米（nm)之間 的光線）。可見光穿越顯示面板910時，除了透過液晶層 913控制光線之穿透量外，某些波長之非原色光線將被彩 色濾光片基板912所吸收，而僅有特定波長之原色光線（例 如是波長為625〜680奈米之紅色光線、波長為520〜540 奈米之綠色光線及波長為450〜500奈米之藍色光線）可 以穿透彩色濾光片基板912。此些可以穿透之原色光線， 最後將在人眼中組成一幅晝面。 然而，光源923所提供之玎見光卻在穿越彩色濾光片 基板912時，大量地被吸收，造成許多可見光的浪費與亮 度的降低。此一現象不僅影響浪晶顯示裝置900之品質表 201104316 I ι 現，更不符經濟效益。 【發明内容】 本發明係有關於一種液晶顯示裝置及其背光模組，其 利用光轉換裝置之設計，以提高可見光穿透钐色濾光片基 板之量。 根據本發明之一方面，提出一種液晶顯示裝置。液晶 顯示裝置包括一顯示面板及一背光模組。顯示面板包括一 I 彩色遽光片基板、一薄膜電晶體基板及一液晶層。彩色滤 光片基板用以吸收一第一光線，並讓一第二光線穿透。第 一光線及第二光線之波長範圍不同，且第一光線及第二光 線之波長範圍皆落於380〜780奈米（nm)之間。液晶層 係設置於彩色濾光片基板及薄膜電晶體基板之間。背光模 組包括一光源及一光轉換裝置。光源至少提供第一光線。 光轉換裝置用以轉換至少部分之第一光線為第二光線。 根據本發明之另一方面，提出一種背光模組。背光模 φ 組係設置於一液晶顯示裝置内。液晶顯示裝置包括背光模 組及顯示面板。顯示面板包括一彩色濾光片基板、一薄膜 電晶體基板及一液晶層。彩色濾光片基板用以吸收一第一 光線，並讓一第二光線穿透。第一光線及第二光線之波長 範圍不同，且第一光線及第二光線之波長範圍皆落於380 〜780奈米（nm)之間。液晶層係設置於彩色濾光片基板 及薄膜電晶體基板之間。背光模組包括一光源及一光轉換 裝置。光源至少提供第一光線。光轉換裝置用以轉換至少 部分之第一光線為第二光線。 201104316 * t 根據本發明之再一方面，提出一種液晶顯示裝置。液 晶顯示裝置包括一顯示面板及一背光模組。顯示面板包括 一彩色濾光片基板、一薄膜電晶體基板及一液晶層。液晶 層係設置於彩色濾光片基板及薄膜電晶體基板之間。背光 模組包括一光源及一光轉換裝置。光源用以提供一可見 光。光轉換裝置用以調變可見光之頻譜，以增加可見光穿 透彩色濾光片基板之量。 根據本發明之另一方面，提出一種背光模組。背光模 組係設置於一液晶顯示裝置内。液晶顯示裝置包括一顯示 面板及背光模組。顯示面板包括一彩色濾、光片基板、一薄 膜電晶體基板及一液晶層。液晶層係設置於彩色遽光片基 板及薄膜電晶體基板之間。背光模組包括一光源及一光轉 換裝置。光源用以提供一可見光。光轉換裝置用以調變可 見光之頻譜，以增加可見光穿透彩色濾光片基板之量。 為讓本發明之上述内容能更明顯易懂，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】 以下係提出一實施例進行詳細說明，實施例僅用以作 為範例說明，並不會限縮本發明欲保護之範圍。此外，實 施例中之圖式係省略不必要之元件，以清楚顯示本發明之 技術特點。 第一實施例 請參照第2圖，其繪示本發明第一實施例之液晶顯示 裝置之示意圖，液晶顯示裝置100包括一顯示面板110及 201104316 一背光模組120。顯示面板110包括一第一偏光板111、 一彩色濾光片基板112、一液晶層113、一薄膜電晶體基 板114及一第二偏光板115。背光模組120包括一光源 123、一光學轉換裝置（例如是一光轉換薄膜122)及一擴 散片121。光源123用以提供一可見光（波長範圍落於380 〜780奈米（nm)之間的光線）。此可見光穿越顯示面板 110時，某些波長之非原色光線將被彩色濾光片基板112 所吸收，而僅有特定波長之原色光線（例如是波長為625 〜680奈米之紅色光線、波長為520〜540奈米之綠色光線 及波長為450〜500奈米之藍色光線）可以穿透彩色濾光 片基板112。此些可以穿透之原色光線，最後將在人眼中 組成一幅晝面。 其中，光轉換薄膜122用以調變上述可見光之頻譜， 以增加可見光穿透彩色濾光片基板112之量。舉例來說， 請參照第3A〜3B圖，第3A圖繪示尚未透過光轉換薄膜轉 換前之第一光線的頻譜，第3B圖繪示透過光轉換薄膜轉 換後之第二光線的頻譜。以TPP-OH為材質之光轉換薄膜 122為例，TPP-OH為材質之光轉換薄膜122可將波長為432 奈米之第一光線轉換為波長為662奈米之第二光線（相當 於紅色光線），所以原本無法穿透彩色濾光片基板112之 第一光線被轉會為可以穿透彩色濾光片基板112之第二光 線，進而提高可見光穿透彩色濾光片基板112之量。 除了 TPP-OH以外，光轉換薄膜122之材質尚有多種 選擇，例如是有機螢光物質、有機金屬錯合物或無機螢光 物質。此類物質均可吸收某種波長範圍之光線，再釋放出 201104316 不同波長範圍之光線或熱能。201104316 VI. Description of the Invention: , * Technical Field of the Invention The present invention relates to a liquid crystal display device and a backlight module thereof, and more particularly to a liquid crystal display device for filtering a partial light source by a color filter substrate and Its backlight module. [Prior Art] With the development of display technology, various display devices have been continuously updated. Taking a liquid crystal display device as an example, please refer to Fig. 1, which is a schematic view showing a conventional liquid crystal display device. The liquid crystal display device 900 includes a display panel 910 and a backlight module 920. The display panel 91A includes a color filter substrate 912, a thin film transistor substrate 914, and a liquid crystal layer 913. The liquid crystal layer 913 is disposed between the color filter substrate 912 and the thin film transistor substrate 914. The backlight module 920 includes a light source 923. Light source 923 is used to provide a visible light (light having a wavelength range between 380 and 780 nanometers (nm)). When visible light passes through the display panel 910, in addition to controlling the amount of light transmitted through the liquid crystal layer 913, certain wavelengths of non-primary light will be absorbed by the color filter substrate 912, and only a specific wavelength of primary light (for example, wavelength) The red light of 625 to 680 nm, the green light of 520 to 540 nm, and the blue light of 450 to 500 nm can penetrate the color filter substrate 912. These primary light rays can be penetrated and will eventually form a face in the human eye. However, the glint light provided by the light source 923 is largely absorbed as it passes through the color filter substrate 912, resulting in a waste of many visible light and a decrease in brightness. This phenomenon not only affects the quality table of the wave crystal display device 900 201104316 I ι, but is even less economical. SUMMARY OF THE INVENTION The present invention is directed to a liquid crystal display device and a backlight module thereof that utilize a design of a light conversion device to increase the amount of visible light penetrating a color filter substrate. According to an aspect of the invention, a liquid crystal display device is proposed. The liquid crystal display device includes a display panel and a backlight module. The display panel includes an I color slab substrate, a thin film transistor substrate and a liquid crystal layer. The color filter substrate absorbs a first light and allows a second light to pass through. The first light and the second light have different wavelength ranges, and the wavelength ranges of the first light and the second light fall between 380 and 780 nanometers (nm). The liquid crystal layer is disposed between the color filter substrate and the thin film transistor substrate. The backlight module includes a light source and a light conversion device. The light source provides at least a first light. The light conversion device is configured to convert at least a portion of the first light into a second light. According to another aspect of the present invention, a backlight module is provided. The backlight mode φ group is disposed in a liquid crystal display device. The liquid crystal display device includes a backlight module and a display panel. The display panel includes a color filter substrate, a thin film transistor substrate, and a liquid crystal layer. The color filter substrate absorbs a first light and allows a second light to pass through. The first light and the second light have different wavelength ranges, and the wavelength ranges of the first light and the second light fall between 380 and 780 nanometers (nm). The liquid crystal layer is disposed between the color filter substrate and the thin film transistor substrate. The backlight module includes a light source and a light conversion device. The light source provides at least a first light. The light conversion device is configured to convert at least a portion of the first light into a second light. 201104316* t According to still another aspect of the present invention, a liquid crystal display device is proposed. The liquid crystal display device comprises a display panel and a backlight module. The display panel includes a color filter substrate, a thin film transistor substrate, and a liquid crystal layer. The liquid crystal layer is disposed between the color filter substrate and the thin film transistor substrate. The backlight module includes a light source and a light conversion device. The light source is used to provide a visible light. The light conversion device is used to modulate the spectrum of visible light to increase the amount of visible light penetrating through the color filter substrate. According to another aspect of the present invention, a backlight module is provided. The backlight module is disposed in a liquid crystal display device. The liquid crystal display device includes a display panel and a backlight module. The display panel comprises a color filter, a light substrate, a thin film transistor substrate and a liquid crystal layer. The liquid crystal layer is disposed between the color filter substrate and the thin film transistor substrate. The backlight module includes a light source and a light conversion device. The light source is used to provide a visible light. The light conversion device is used to modulate the spectrum of the visible light to increase the amount of visible light that penetrates the color filter substrate. In order to make the above description of the present invention more comprehensible, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is intended to be illustrative and not to limit the scope of the invention. In addition, the drawings in the embodiments omit unnecessary elements to clearly show the technical features of the present invention. First Embodiment Referring to FIG. 2, a schematic diagram of a liquid crystal display device according to a first embodiment of the present invention is shown. The liquid crystal display device 100 includes a display panel 110 and a backlight module 120 of 201104316. The display panel 110 includes a first polarizing plate 111, a color filter substrate 112, a liquid crystal layer 113, a thin film transistor substrate 114, and a second polarizing plate 115. The backlight module 120 includes a light source 123, an optical conversion device (for example, a light conversion film 122), and a diffusion sheet 121. The light source 123 is used to provide a visible light (light having a wavelength range between 380 and 780 nanometers (nm)). When the visible light passes through the display panel 110, certain wavelengths of non-primary light will be absorbed by the color filter substrate 112, and only a specific wavelength of primary light (for example, a red light having a wavelength of 625 to 680 nm, a wavelength of The green light of 520 to 540 nm and the blue light of 450 to 500 nm can penetrate the color filter substrate 112. These primary light rays can be penetrated and will eventually form a face in the human eye. The light conversion film 122 is used to modulate the spectrum of the visible light to increase the amount of visible light penetrating the color filter substrate 112. For example, please refer to FIG. 3A to FIG. 3B. FIG. 3A shows the spectrum of the first light before the conversion of the light conversion film, and FIG. 3B shows the spectrum of the second light after the conversion by the light conversion film. For example, a light conversion film 122 made of TPP-OH is used, and a light conversion film 122 made of TPP-OH can convert a first light having a wavelength of 432 nm into a second light having a wavelength of 662 nm (equivalent to red). The first light that cannot penetrate the color filter substrate 112 is transferred to a second light that can penetrate the color filter substrate 112, thereby increasing the amount of visible light penetrating the color filter substrate 112. In addition to TPP-OH, the material of the light conversion film 122 has various options such as an organic fluorescent substance, an organic metal complex or an inorganic fluorescent substance. These materials can absorb light in a certain wavelength range, and then release the light or heat of different wavelengths of 201104316.
其中’有機螢光物質例如是為含有低7Γ到7Γ*轉換能 階不飽和鍵的笨環化合物。當此種化合物具平面性及剛硬 性（rigid)且含有推電子效應或增加π鍵共振性的取代 基時’均能在吸收特定波長的光線後，發揮出相當優良的 螢光發光效率。如表一所示，TPP、ΤΡΡ-0Η、TPP-CPPH及 TPP-Ada分別可吸收418奈米、423奈米、421奈米及424 奈米之第一光線，並釋放出654奈米、662奈米、648奈 米及656奈米之第二光線。 ΤΡΡ TPP-OH TPP-C00H TPP-Ada 吸收 第一光線 418 nm 423 nm 421 nm 424 nm 釋放 第二光線 654 nm 662 nm 648 nm 656 nm 表一 有機金屬錯合物例如是鎂（Mg)或辞（Zn)等錯合物。 此類錯口物均此在吸收特定波長的光線後，將釋放出螢 光。以ΖηΤΡΡ為例，ZnTpp可吸收426奈米之第一光線並 釋放出611奈米之第二光線。 無機營光物質例如是*主體化合物及活化劑所組成 錯合物均能在吸收蚊波長的光線後， 良的螢光發光效率。其中活化劑之添加量可以用 來控制螢光的強度（甚至是控制螢光的顏色）。 8 201104316 當然，上述光源123可以原本就同時提供第一光線及 第二光線。藉由光轉換薄膜122將第一光線轉換為第二光 線，而增加第二光線的量。 或者，上述光源123可以原本就不提供第二光線。藉 由光轉換薄膜122將第一光線轉換為第二光線1而提供光 源123所沒有的第二光線。 就光轉換薄膜122之設置位置而言，光轉換薄膜122 係可設置於第二偏光片115及光源123之間。如此可避免 φ 光轉換薄膜122影響光線在第二偏光片115的偏光效果。 較佳地，本實施例之光轉換薄膜122係設置於擴散片 121及光源123之間。如此一來，即可避免光轉換薄膜122 影響光線在擴散片121之擴散效果。 此外，上述光轉換薄膜122雖然係以轉換第一光線為 第二光線為例做說明。然而，光轉換薄膜122並不限定於 用以轉換單一光線。光轉換薄膜122可以更將第三光線轉 換為第四光線（第三光線與第一光線之波長範圍不同）。 φ 所以原本無法穿透彩色濾光片基板112之第三光線被轉會 為可以穿透彩色濾光片基板112之第四光線，進而更提高 可見光穿透彩色濾光片基板112之量。也就是說，光轉換 薄膜122可以用以同時轉換多種光線，設計者係可依據實 際需求來做設計。 再者，在轉換兩種光線的設計下，設計者可透過材料 的選擇，將第二光線與第三光線之波長範圍設定為不同， 並將第四光線與第一光線之波長範圍設定為不同。如此一 來，轉換後的第二光線不會又被轉換成第四光線，且轉換The 'organic fluorescent substance' is, for example, a stupid compound containing a low-order 7 to 7 Γ* conversion energy-stable unsaturated bond. When such a compound is planar and rigid and contains a push-electron effect or a substituent which increases the resonance of the π bond, it can exhibit a relatively excellent fluorescence luminous efficiency after absorbing light of a specific wavelength. As shown in Table 1, TPP, ΤΡΡ-0Η, TPP-CPPH and TPP-Ada can absorb the first rays of 418 nm, 423 nm, 421 nm and 424 nm, respectively, and release 654 nm, 662. Second light of nano, 648 nm and 656 nm. ΤΡΡ TPP-OH TPP-C00H TPP-Ada absorbs the first light 418 nm 423 nm 421 nm 424 nm releases the second light 654 nm 662 nm 648 nm 656 nm The first organometallic complex is, for example, magnesium (Mg) or Zn) and other complexes. Such erroneous substances will release fluorescence after absorbing light of a specific wavelength. Taking ΖηΤΡΡ as an example, ZnTpp can absorb the first light of 426 nm and release the second light of 611 nm. The inorganic camping light substance is, for example, a compound composed of a main compound and an activator, and is capable of absorbing light of a mosquito wavelength, and has good fluorescence luminous efficiency. The amount of activator added can be used to control the intensity of the fluorescence (even the color of the fluorescent control). 8 201104316 Of course, the above light source 123 can provide the first light and the second light at the same time. The amount of the second light is increased by converting the first light into the second light by the light conversion film 122. Alternatively, the light source 123 may not provide the second light originally. The first light is converted into the second light 1 by the light conversion film 122 to provide the second light which is not provided by the light source 123. The light conversion film 122 can be disposed between the second polarizer 115 and the light source 123 in terms of the position at which the light conversion film 122 is disposed. Thus, the φ light conversion film 122 can be prevented from affecting the polarizing effect of the light on the second polarizer 115. Preferably, the light conversion film 122 of the present embodiment is disposed between the diffusion sheet 121 and the light source 123. In this way, the light conversion film 122 can be prevented from affecting the diffusion effect of the light on the diffusion sheet 121. Further, the above-described light conversion film 122 is exemplified by converting the first light into the second light. However, the light conversion film 122 is not limited to use to convert a single light. The light conversion film 122 can further convert the third light into a fourth light (the third light is different from the wavelength range of the first light). Therefore, the third light which is not able to penetrate the color filter substrate 112 is transferred to the fourth light which can penetrate the color filter substrate 112, thereby further increasing the amount of visible light penetrating the color filter substrate 112. That is to say, the light conversion film 122 can be used to simultaneously convert a plurality of lights, and the designer can design according to actual needs. Furthermore, in the design of converting two kinds of light, the designer can set the wavelength range of the second light and the third light differently by selecting the material, and set the wavelength range of the fourth light and the first light to be different. . In this way, the converted second light will not be converted into the fourth light again, and the conversion
* I 201104316 後的第四光線也不會又被轉換成第二光線。 請參照第4圖，其繪示第一實施例之光轉換薄膜之示 意圖。在轉換兩種光線的設計下，光轉換薄膜122包括一 第一材料122a及一第二材料122b。第一材料122a用以轉 換至少部分之第一光線為第二光線。第二材料122b用以 轉換至少部分之第三光線為第四光線。在本實施例中，光 轉換薄膜122之第一材料122a及第二材料122b係均勻地 混合成單層之薄膜（在第4圖中係以兩種混合之網點表示 兩種材料的混合，實際上第一材料122a及第二材料122b 已均勻地混合）。以此種方式，可以讓光線穿越光轉換薄 膜122時，第一材料122a及第二材料122b之轉換效果同 時發揮出來。 雖然，上述光轉換薄膜122係以轉換兩種光線為例做 說明，然而光轉換薄膜122亦可用以轉換兩種以上的光 線，設計者可以依據需求來選擇。例如，在轉換多種光線 的設計下，光轉換薄膜122包括多種材料，每一種材料用 以轉換一種光線。並將所有的欲轉換之光線與所有的轉換 後之光線的波長範圍設定為不同。如此一來，轉換後之光 線不會又被轉換成其他的光線。 同樣地，在本實施例中，多種材料係均勻混合成單層 之薄膜。透過此種方式，可以讓光線穿越光轉換薄膜122 時，多種材料之轉換效果同時發揮出來。 請參照第5A〜5B圖，第5A圖繪示尚未透過光轉換薄 膜轉換前之可見光的頻譜，第5B圖繪示透過光轉換薄膜 轉換後之可見光的頻譜。可見光在透過光轉換薄膜122轉 201104316 亂 * 換後，波長為625〜680奈米之紅色光線、波長為520〜540 奈米之綠色光線及波長為450〜500奈米之藍色光線的穿 透量明顯增加許多。所以在光轉換薄膜122的設計下，可 見光之整體頻譜可被適當地調整，進而提高可見光穿透彩 色濾光片基板112之量。 第二實施例 請參照第6圖，其繪示依照本發明第二實施例之液晶 _ 顯示裝置之示意圖。本實施例之液晶顯示裝置200與第一 實施例之液晶顯示裝置100不同之處在於光轉換薄膜222 之設置位置，其餘相同之處不再重述。 如第6圖所示，背光模組220更包括一反射片224， 光轉換薄膜222係設置於反射片224上。光源123所射出 之部分可見光投射於光轉換薄膜222及反射片224上，此 部分之可見光的頻譜經過裝轉換薄膜222適當地轉換後， 進而提高可見光可穿越彩色濾光片基板112的量。 第三實施例 請參照第7圖，其繪示依照本發明第三實施例之光轉 換薄膜之示意圖。本實施例之光轉換薄膜322與第一實施 例之光轉換薄膜122不同之處在於在各種材料之設置方 式，其餘相同之處不再重述。 以轉換兩種光線之光轉換薄膜322為例，光轉換薄膜 322包括一第一材料322a及一第二材料322b，第一材料 322a用以轉換至少部分之第一光線為第二光線。第二材料 201104316 =一用二 分之第三光線為第四光線。本實施例 膜1如二! 料3221}係堆疊成二層以上之薄 、 "以疋一層第一材料322a及一層第_材料322b 的堆巷;或者是兩層第一材料3 第_:= 的交互堆4 ;或者可以是多層第-材料丄= =1=互…7圖係"第-二及 曰遠Μ13的堆豐為例來繪示。透過堆疊的方式， 可以讓先線穿越光轉換薄膜奶時，第二材料及第 一材料322a之轉換效果依序發握屮办 若以轉換多種光線之光轉換薄膜322為例’光轉換薄 膜322則包括多種材料，每一種材料用以轉換一種光線。 此些材料係堆疊成多層之薄膜。同樣地，透過此種堆疊方 式，可以讓光線穿越光轉換薄膜322時，多種材料之轉換 效果依序發揮出來。 本發明上述實施例所揭露之液晶顯示裝置及背光模 組具有多項優點’以下僅列舉部分優點說明如下： 第一、在光轉換裝置（例如是光轉換薄膜）的設計下， 光源所提供之可見光的頻譜可被適當地調整，進而提高可 見光穿透彩色濾光片基板之量。 第二、就光轉換薄膜之設置位置而言，光轉換薄膜係 可設置於第二偏光片及光源之間。如此可避免光轉換薄膜 影響光線在第二偏光片的偏光效果。 第三、較佳地，光轉換薄膜係可設置於擴散片及光源 之間，以避免光轉換薄膜影響光線在擴散片之擴散效果。 第四、在一實施例中，光轉換薄膜係可設置於反射片 12 201104316 ( * 上。光源所射出之部分可見光投射於光轉換薄膜及反射片 上，此部分之可見光的頻譜經過裝轉換薄膜適當地轉換 後’亦可提高可見光可穿越彩色濾光片基板的量。 第五、在轉換多種光線的設計下，設計者可透過材料 的選擇’將所有的欲轉換之光線與所有的轉換後之光線的 波長範圍狀為不同。如此-來，轉之光線不會又被 轉換成其他的光線。 第六、在-實施例中，光轉換薄膜之各種材料係可均 句混合成單層之薄膜。透過此種方式，可m線穿越光 轉換薄膜時，多種材料之轉換效果同時發揮出來。 第七、在-實施例中，光轉換薄膜之各種材料係 曼成多層之薄膜。透過此種方式，可以讓光線穿越光轉換 薄膜時，多種材料之轉換效果依序發揮出來。 综上所述，雖然本發明已以較佳實施例㈣如上^ 其並非用以限定本發明。本發明所屬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 利範圍所界定者為準。 胃♦ 【圖式簡單說明】 第1圖繪示一種傳統液晶顯示裝置之示意圖。 第2圖繪示本發明第一實施例之液晶顯示裝 意圖。 〃 第3A圖繪示尚未透過光轉換薄臈轉換前之第一 的頻譜。 、 第3B圖繪示透過光轉換薄膜轉換後之第二光線的頻 13* The fourth light after I 201104316 will not be converted to the second light again. Referring to Figure 4, there is shown a schematic view of a light conversion film of the first embodiment. In the design of converting two kinds of light, the light conversion film 122 includes a first material 122a and a second material 122b. The first material 122a is configured to convert at least a portion of the first light into a second light. The second material 122b is configured to convert at least a portion of the third light into a fourth light. In the present embodiment, the first material 122a and the second material 122b of the light conversion film 122 are uniformly mixed into a single layer film (in FIG. 4, the two kinds of mixed dots represent the mixing of the two materials, actually The upper first material 122a and the second material 122b have been uniformly mixed). In this manner, when the light passes through the light conversion film 122, the conversion effects of the first material 122a and the second material 122b are simultaneously exerted. Although the above-mentioned light conversion film 122 is exemplified by converting two kinds of light, the light conversion film 122 can also be used to convert two or more kinds of light, and the designer can select according to requirements. For example, in a design that converts multiple lights, the light converting film 122 includes a plurality of materials, each of which is used to convert a light. And set all the wavelengths to be converted to different wavelength ranges from all converted rays. As a result, the converted light will not be converted into other light. Also, in the present embodiment, a plurality of materials are uniformly mixed into a single layer film. In this way, when light passes through the light conversion film 122, the conversion effects of various materials are simultaneously exerted. Referring to Figures 5A to 5B, Figure 5A shows the spectrum of visible light before conversion through the light conversion film, and Figure 5B shows the spectrum of visible light after conversion through the light conversion film. After the visible light is transmitted through the light conversion film 122 to 201104316, the red light having a wavelength of 625 to 680 nm, the green light having a wavelength of 520 to 540 nm, and the blue light having a wavelength of 450 to 500 nm are penetrated. The amount has increased significantly. Therefore, under the design of the light conversion film 122, the overall spectrum of the visible light can be appropriately adjusted to increase the amount of visible light penetrating the color filter substrate 112. SECOND EMBODIMENT Referring to Figure 6, there is shown a schematic view of a liquid crystal display device in accordance with a second embodiment of the present invention. The liquid crystal display device 200 of the present embodiment is different from the liquid crystal display device 100 of the first embodiment in the arrangement position of the light conversion film 222, and the rest of the same points will not be repeated. As shown in FIG. 6 , the backlight module 220 further includes a reflective sheet 224 , and the light conversion film 222 is disposed on the reflective sheet 224 . Part of the visible light emitted from the light source 123 is projected onto the light conversion film 222 and the reflection sheet 224. The spectrum of the visible light in this portion is appropriately converted by the conversion film 222, thereby increasing the amount of visible light that can pass through the color filter substrate 112. THIRD EMBODIMENT Referring to Figure 7, there is shown a schematic view of a light conversion film in accordance with a third embodiment of the present invention. The light conversion film 322 of the present embodiment is different from the light conversion film 122 of the first embodiment in the arrangement of various materials, and the rest of the same points will not be repeated. For example, the light conversion film 322 includes a first material 322a and a second material 322b. The first material 322a is configured to convert at least a portion of the first light into a second light. Second material 201104316 = A third light is used as the fourth light. In this embodiment, the film 1 such as the second material 3221 is stacked in a thin layer of two or more layers, and is formed by stacking a first layer of material 322a and a layer of material 322b; or two layers of the first material 3: = interactive heap 4; or may be multi-layered - material 丄 = =1 = mutual ... 7 diagram "quote - 2nd and 曰 Μ 的 13 piled up as an example to illustrate. By stacking, when the first line passes through the light conversion film milk, the conversion effect of the second material and the first material 322a is sequentially performed. For example, the light conversion film 322 for converting a plurality of light rays is taken as an example of the light conversion film 322. It includes a variety of materials, each of which is used to convert a light. These materials are films stacked in multiple layers. Similarly, by this stacking method, when light passes through the light conversion film 322, the conversion effects of various materials are sequentially exerted. The liquid crystal display device and the backlight module disclosed in the above embodiments of the present invention have a plurality of advantages. The following only some of the advantages are described as follows: First, under the design of a light conversion device (for example, a light conversion film), the visible light provided by the light source The spectrum can be appropriately adjusted to increase the amount of visible light that passes through the color filter substrate. Secondly, in terms of the position at which the light conversion film is disposed, the light conversion film can be disposed between the second polarizer and the light source. This prevents the light conversion film from affecting the polarizing effect of the light on the second polarizer. Thirdly, preferably, the light conversion film can be disposed between the diffusion sheet and the light source to prevent the light conversion film from affecting the diffusion effect of the light on the diffusion sheet. Fourthly, in an embodiment, the light conversion film can be disposed on the reflective sheet 12 201104316 (*). Part of the visible light emitted by the light source is projected on the light conversion film and the reflection sheet, and the spectrum of the visible light in the portion is appropriately converted by the conversion film. After the ground conversion, it can also increase the amount of visible light that can pass through the color filter substrate. Fifth, in the design of converting multiple lights, the designer can select all the light to be converted and all the converted materials through the material selection. The wavelength range of the light is different. Thus, the converted light is not converted into other light. In the sixth embodiment, the various materials of the light conversion film can be uniformly mixed into a single layer film. In this way, when the m-line passes through the light conversion film, the conversion effects of various materials are simultaneously exerted. In the seventh embodiment, the various materials of the light conversion film are formed into a multilayer film. When the light passes through the light conversion film, the conversion effects of the plurality of materials are sequentially exerted. In summary, although the present invention has been in the preferred embodiment (4) The present invention is not intended to limit the invention. Those skilled in the art can make various changes and refinements without departing from the spirit and scope of the invention. The following is a definition of a liquid crystal display device according to a first embodiment of the present invention. FIG. 〃 Figure 3A shows the first spectrum before the conversion by the light conversion thin film. Figure 3B shows the frequency of the second light after conversion by the light conversion film.
I 201104316 譜。 第4圖繪示第一實施例之光轉換薄膜之示意圖。 第5A圖繪示尚未透過光轉換薄膜轉換前之可見光的 頻譜。 第5B圖繪示透過光轉換薄膜轉換後之可見光的頻 譜。 第6圖繪示依照本發明第二實施例之液晶顯示裝置 之示意圖。 第7圖繪示依照本發明第三實施例之光轉換薄膜之 示意圖。 【主要元件符號說明】 100、200、900 :液晶顯示裝置 110、910 :顯示面板 111 :第一偏光片 112、 912 :彩色濾光片基板 113、 913 :液晶層 114、 914 :薄膜電晶體基板 115 :第二偏光片 120、220、920 :背光模組 121 :擴散片 122、 222、322 :光轉換薄膜 122a、322a :第一材料 122b、322b :第二材料 123、 923 :光源 224 :反射片I 201104316 Spectrum. Fig. 4 is a schematic view showing the light conversion film of the first embodiment. Fig. 5A is a view showing the spectrum of visible light before being converted by the light conversion film. Fig. 5B is a view showing the spectrum of visible light converted by the light conversion film. Fig. 6 is a view showing a liquid crystal display device in accordance with a second embodiment of the present invention. Fig. 7 is a view showing a light conversion film according to a third embodiment of the present invention. [Main component symbol description] 100, 200, 900: liquid crystal display device 110, 910: display panel 111: first polarizer 112, 912: color filter substrate 113, 913: liquid crystal layer 114, 914: thin film transistor substrate 115: second polarizer 120, 220, 920: backlight module 121: diffuser 122, 222, 322: light conversion film 122a, 322a: first material 122b, 322b: second material 123, 923: light source 224: reflection sheet