200848841 WFy3ii-C202-0572 23497twf.doc/e 九、發明說明： 液日日顯不面板及液晶顯示器，且 面功能的液晶顯示面板及液晶顯 【發明所屬之技術領域】 本發明是有關於一種 特別是有關於一種具有鏡 示器。 【先前技術】 ik著科技的日显發達’行動電話(mGbileph_)、數位 〇 相機(digital camera)、數位攝影機(digiM Video camera)、筆 記型電腦(她bookW及桌上型電腦等數位化卫具益不朝 向更便利、多功能且美觀的方向發展。在使用這些資訊產 品時’顯示榮幕是不可或缺的人機溝通界面，透過顯示榮 幕的顯示功能，使用者在產品的操作上更為便利。液晶顯 示器因具有省電、低輕射等優點，儼然已成為顯示勞幕之 主流。 就實用性而έ，顯示螢幕若能加上反射鏡面的效果， 必定能夠擴展顯示螢幕的應用範圍。目前，美國專利第 7088406號提出在液晶顯示面板中，利用偏光片加設雙重 增光膜(double brightness enhanced film，DBEF)的設計，以 提供鏡面功能。然而，雙重增光膜是一種由多層膜結構所 構成的選擇性反射板，價格相當昂貴且容易刮傷，且當設 計應用於液晶顯示面板之大量生產時，有耗費人工之問 題。此外，若利用膽固型液晶分子以製作此類液晶顯示面 板’則液晶顯示面板的光線利用率將大幅下降。 在台灣專利第1248152號中’利用開口性反射膜提供 200848841 w r 7 ^ χ 1-0202-0572 23497twf.doc/e 液晶顯示面板鏡面之功用，並以開口性反射膜之開口作為 顯示之區域。只是，開口性反射膜向來有開口率低的門題 使得液晶顯示面板的顯示亮度大幅受限。當然，也有此液 晶顯示面板是利用半透膜以達到鏡面之功效，卻仍有& 利用率低的問題。 Ο 整體而言，欲使液晶顯示面板具有鏡面功能又能兼顧 液晶顯示面板的顯示品質以及提高對背光源光線=利用 率’仍為一項難題。 【發明内容】 一本發明提供一種液晶顯示面板，以提高液晶顯示面板 顯示影像的色飽和度，並使液晶顯示面板兼具鏡面之功能。 本發明另提供一種液晶顯示器，以解決習知之具有鏡 面功能的液晶顯示器之光線利用率低的問題。 本發明提出一種液晶顯示面板，包括主動元件陣列基 板對向基板、光學濾光膜以及液晶層。對向基板配置於 主動凡件陣列基板上方，而光學濾光膜配置於對向基板 上光子;慮光膜包括第一半透金屬層、間隙層以及第二半 透金屬層，其中間隙層配置於第一半透金屬層以及第二半 透金屬層之間。液晶層則配置於主動元件陣列基板以及對 向基板之間。 本發明另提出一種液晶顯示器，包括主動元件陣列基 板:對向基板、液晶層以及背光模組。對向基板配置於主 動凡件陣舰板上方，且對向基板具有光賴、光膜。光學 ;慮光膜包括依序堆疊之第—半透金屬層、_層以及第二 200848841 ”上〜A a-C202-0572 23497twf.doc/e 半透金屬層。液晶層配置於主動元件陣列基板以及對向基 板之間。背光模組配置於主動元件陣列基板之下方。土 本發明之一實施例中，上述之第一半透金屬層之材質 包括銀、銀合金或鉻。另外，上述之第二半透金屬層之材 貝包括銀、銀合金或絡。 本發明之一實施例中，上述之間隙層之材質包括介電 材料。進—步而言’間隙層之材f例如是氧切、氮化ς 或氮氣化梦。 本發明之一實施例中，藉由不同厚度之間隙層，以使 光線經過光學濾光膜作用之後，呈現紅光、綠光或是藍光。 、本發明之-實施例中’液晶顯示面板更包括第二光 片以及第―偏光片。第—偏光片例如是配置於對向基板 上，而第二偏光片則例如是配置於主動元件陣列基板上。 本發明之-實施例中’液晶顯示面板更包括一可切換 2位差板’其配置於第—偏光片以及光學㈣膜之間， /、中，可切換式相位差板所提供之相位差在〇與λ/4之間 切換。 在本發明之—實闕巾，上叙背紐組開啟時，可 二換式相位差板之所提供相位差為λ/4，而f光模組關閉 守了切換式相位差板所提供之相位差為〇。 t發明’用半透金屬層、㈣:層與半透金屬層的夹 :=所構成之光學㈣顧作為濾H，可使液晶顯 的顯不晝面具有高色飽和度。同時，本發明也利用 +透金屬層狀雜質赌供液晶顯㈣板鏡面反射的功 7 200848841 ” 1 〜u〜202-0572 23497twf.doc/e 月b因此’本發明之液晶顯示面板不需搭配選擇性反射板 或是開孔的設計即具有鏡面功能。此外，本發明之液晶顯 示面板搭配背光模組而組成之液晶顯示器具有較高的光線 利用率。 為邊本發明之上述和其他目的、特徵和優點能更明顯 易懂，下文特舉實施例，並配合所附圖式，作詳細說明如 Τ 〇 … 【實施方式】 一 圖1繪示為本發明之一實施例之液晶顯示面板的剖面 示意圖。請參照圖1，液晶顯示面板100包括主動元件陣 列基板110、對向基板12〇、光學濾光膜13〇以及液晶層 140。對向基板12〇配置於主動元件陣列基板u〇上方，而 光子;慮光膜130配置於對向基板12〇上。液晶層則配 置於主動元件陣列基板11〇以及對向基板12〇之間。 圖2繪示為本發明之一實施例之光學濾光膜的剖面示 意圖。請同時參照圖1與圖2，光學濾光膜13〇包括第一 U 半透金屬層132、間隙層134以及第二半透金屬層136，其 中間隙層134配置於第一半透金屬層132以及第二半透金 屬層136之間。就光學濾光膜13〇之配置方式而言，在本 實施例中是將光學濾光膜130配置於對向基板12〇與液晶 層140之間；而在其他實施例中，光學濾光膜13〇也可以 是配置於液晶層140相對於對向基板12〇之另一側上。以 材質的種類而言，第一半透金屬層132之材質包括銀、銀 合金或鉻，而第二半透金屬層136之材質也例如是銀、銀 200848841 WP9511-C202-0572 23497twf.doc/e 合金或鉻。另外，間隙層134例如是由介電材料所構 具體來說，間隙層134之材質例如是氧化矽、氮化 : 氧化矽。 "我虱 一般的彩色濾光膜多是利用不同顏色的彩色顏料i 樹脂均勻混合而成的，其中彩色顏料可對不同波長的光^ 有不同之吸收程度而使通過彩色濾光膜的光線可呈現特定 的顏色。然而，彩色濾光膜會吸收大部分光線，而有光線 利用率很低的問題，同時通過彩色濾光膜的光線多有色飽 和度不足的現象。本實施例的光學濾光膜13〇由第一半透 金屬層132、間隙層134以及第二半透金屬層136構成， 其藉由不同厚度之間隙層134,可使光線經過光學濾光膜 1+30作用之後，呈現紅光、綠光或是藍光之穿透光線。此 日守，具有不同波長的光線並非被吸收，而是被光學濾光膜 130反射至與入射光之同一侧，亦即本發明之光學濾光膜 130不會將大部份的光線吸收。因此，本發明之光學濾光 膜130的光線利用率高於習知之彩色濾光膜。 詳言之，當間隙層134之材質為二氧化矽(Si〇2)時， 間隙層134之厚度例如可以介於5〜120奈米、120〜145 奈米以及145〜190奈米三種厚度，以使光線經過光學濾光 膜13〇作用後分別呈現藍色、綠色及紅色之穿透光線。另 一方面，當間隙層134之材質為氮化矽(si3N4)時，間隙層 134之厚度例如是調整至介於5〜70奈米、70〜95奈米以 及95〜120奈米三種厚度，以使光線經過光學濾光膜13〇 作用後分別呈現藍色、綠色及紅色之穿透光線。 9 200848841 WP9511-C202-0572 23497twf.doc/e 另外，由實際經驗得知，經過光學濾光膜130作用後 所呈現的光線之波長分布在狹小的範圍内。換言之，光線 經光學濾光膜130作用後可以呈現高色飽和度的色彩。因 此，本發明之光學濾光膜130可以使液晶顯示面板1〇〇顯 示的影像較為鮮艷(高色飽和度）。200848841 WFy3ii-C202-0572 23497twf.doc/e IX. Description of the invention: Liquid crystal display panel and liquid crystal display with liquid crystal display and surface function [Technical field of invention] The present invention relates to a special There is a kind of mirror with a mirror. [Prior technology] ik technology developed by the Japanese mobile phone (mGbileph_), digital camera (digital camera), digital camera (digiM Video camera), notebook computer (her bookW and desktop computers and other digital aids Benefits are not developed in a more convenient, versatile and aesthetic direction. When using these information products, 'displaying the honor screen is an indispensable human-machine communication interface. By displaying the display function of the screen, the user can operate the product more. For convenience, the liquid crystal display has become the mainstream of the display screen because of its advantages of power saving, low light shooting, etc. In terms of practicality, if the display screen can be added with a mirror surface effect, it is sure to expand the application range of the display screen. At present, U.S. Patent No. 7,084,046 proposes to use a polarizer to add a double brightness enhanced film (DBEF) to provide a mirror function in a liquid crystal display panel. However, the double brightness enhancement film is a multilayer film structure. The selective reflection plate is expensive and easy to scratch, and is designed to be applied to a liquid crystal display panel. In production, there is a problem of labor. In addition, if the liquid crystal display is used to make such a liquid crystal display panel, the light utilization efficiency of the liquid crystal display panel will be greatly reduced. In Taiwan Patent No. 1248152, 'Using open-end reflection The film provides 200848841 wr 7 ^ χ 1-0202-0572 23497twf.doc/e The function of the mirror surface of the liquid crystal display panel, and the opening of the open reflective film is used as the display area. However, the open reflective film has a door with a low aperture ratio. The problem is that the display brightness of the liquid crystal display panel is greatly limited. Of course, there is also a problem that the liquid crystal display panel utilizes a semi-permeable film to achieve a mirror surface, but there is still a problem of low utilization rate. Ο Overall, for liquid crystal display It is still a problem that the panel has a mirror function and the display quality of the liquid crystal display panel and the improvement of the backlight light utilization rate. [Invention] The present invention provides a liquid crystal display panel for improving the display image of the liquid crystal display panel. Color saturation, and the liquid crystal display panel has the function of mirror surface. The present invention further provides a liquid crystal display. The invention solves the problem of low light utilization rate of the conventional mirror-enabled liquid crystal display. The invention provides a liquid crystal display panel comprising an active device array substrate opposite substrate, an optical filter film and a liquid crystal layer. Above the array substrate, the optical filter film is disposed on the opposite substrate; the light film comprises a first semi-transmissive metal layer, a gap layer and a second semi-transmissive metal layer, wherein the gap layer is disposed on the first semi-transmissive metal layer And the second semi-transmissive metal layer is disposed between the active device array substrate and the opposite substrate. The invention further provides a liquid crystal display comprising an active device array substrate: an opposite substrate, a liquid crystal layer and a backlight module . The opposite substrate is disposed above the active array board, and the opposite substrate has a light ray and a light film. The optical film comprises a first-semi-transparent metal layer, a layer, and a second 200848841"~A a-C202-0572 23497twf.doc/e semi-transmissive metal layer. The liquid crystal layer is disposed on the active device array substrate. And the backlight module is disposed under the active device array substrate. In one embodiment of the invention, the material of the first semi-transmissive metal layer comprises silver, a silver alloy or chromium. The material of the second semi-transmissive metal layer comprises silver, a silver alloy or a network. In one embodiment of the invention, the material of the gap layer comprises a dielectric material. For further, the material of the gap layer f is, for example, oxygen. In one embodiment of the present invention, the gap layer of different thickness is used to cause the light to pass through the optical filter film to exhibit red light, green light or blue light. In the embodiment, the liquid crystal display panel further includes a second light sheet and a first polarizer. The first polarizer is disposed on the counter substrate, for example, and the second polarizer is disposed on the active device array substrate, for example. Implementation of the present invention In the example, the liquid crystal display panel further includes a switchable 2-position difference plate disposed between the first polarizer and the optical (four) film, and the phase difference provided by the switchable phase difference plate is 〇 and λ/ Switching between 4. In the present invention, when the upper back group is opened, the phase difference provided by the two-stage phase difference plate is λ/4, and the f-light module is closed to maintain the switching phase. The phase difference provided by the difference plate is 〇. The invention uses a semi-transmissive metal layer, (4): the layer and the semi-transmissive metal layer are sandwiched: = the optical structure (4) is regarded as the filter H, and the liquid crystal display can be displayed. It has high color saturation. At the same time, the present invention also utilizes the + metal-transparent layered impurity to gamble for the work of mirror reflection of the liquid crystal display (2008). 4 200848841 ” 1 〜u~202-0572 23497 twf.doc/e month b thus 'the invention The liquid crystal display panel has a mirror function without the need of a selective reflector or an aperture design. In addition, the liquid crystal display panel composed of the liquid crystal display panel of the present invention and the backlight module has high light utilization efficiency. The above and other objects, features, and advantages of the present invention will become more apparent from the aspects of the invention. A schematic cross-sectional view of a liquid crystal display panel according to an embodiment of the invention. Referring to FIG. 1, a liquid crystal display panel 100 includes an active device array substrate 110, an opposite substrate 12A, an optical filter film 13A, and a liquid crystal layer 140. The counter substrate 12A is disposed above the active device array substrate u〇, and the photon; the photo film 130 is disposed on the counter substrate 12. The liquid crystal layer is disposed between the active device array substrate 11A and the opposite substrate 12A. Fig. 2 is a cross-sectional view showing an optical filter film according to an embodiment of the present invention. Referring to FIG. 1 and FIG. 2 simultaneously, the optical filter film 13A includes a first U-transmissive metal layer 132, a gap layer 134, and a second semi-transmissive metal layer 136, wherein the gap layer 134 is disposed on the first semi-transmissive metal layer 132. And between the second semi-transmissive metal layers 136. In the embodiment, the optical filter film 130 is disposed between the opposite substrate 12 and the liquid crystal layer 140; and in other embodiments, the optical filter film is disposed. 13〇 may also be disposed on the other side of the liquid crystal layer 140 with respect to the opposite substrate 12. The material of the first semi-transmissive metal layer 132 includes silver, silver alloy or chromium, and the material of the second semi-transmissive metal layer 136 is, for example, silver, silver 200848841 WP9511-C202-0572 23497twf.doc/ e alloy or chrome. Further, the gap layer 134 is made of, for example, a dielectric material. Specifically, the material of the gap layer 134 is, for example, yttrium oxide or yttrium oxide. "My general color filter film is made by uniformly mixing different colors of color pigment i resin, wherein the color pigment can absorb the light passing through the color filter film with different absorption degrees of different wavelengths of light. A specific color can be rendered. However, the color filter film absorbs most of the light, and there is a problem that the light utilization rate is low, and the light passing through the color filter film has insufficient color saturation. The optical filter film 13 of the present embodiment is composed of a first semi-transmissive metal layer 132, a gap layer 134 and a second semi-transmissive metal layer 136, which can pass light through the optical filter film by using the gap layer 134 of different thicknesses. After 1+30, the light of red, green or blue light is reflected. In this case, light having different wavelengths is not absorbed, but is reflected by the optical filter film 130 to the same side as the incident light, that is, the optical filter film 130 of the present invention does not absorb most of the light. Therefore, the optical filter film 130 of the present invention has higher light utilization efficiency than the conventional color filter film. In detail, when the material of the gap layer 134 is cerium oxide (Si〇2), the thickness of the gap layer 134 may be, for example, three thicknesses of 5 to 120 nm, 120 to 145 nm, and 145 to 190 nm. In order to make the light pass through the optical filter film 13 呈现, the blue, green and red penetrating rays respectively appear. On the other hand, when the material of the gap layer 134 is tantalum nitride (si3N4), the thickness of the gap layer 134 is adjusted to, for example, three thicknesses of 5 to 70 nm, 70 to 95 nm, and 95 to 120 nm. In order to make the light pass through the optical filter film 13 呈现, the blue, green and red penetrating rays respectively appear. 9 200848841 WP9511-C202-0572 23497twf.doc/e In addition, it is known from practical experience that the wavelength of light presented by the optical filter film 130 is distributed within a narrow range. In other words, the light can exhibit a high color saturation color after being applied through the optical filter film 130. Therefore, the optical filter film 130 of the present invention can make the image displayed on the liquid crystal display panel 1 较为 brighter (high color saturation).
Ο 請再參照圖1，在本實施例中，液晶顯示面板1〇〇更 包括第一偏光片152以及第二偏光片154,其中第一偏光 片152例如是配置於對向基板13〇上，而第二偏光片154 則例如是配置於主動元件陣列基板110上。詳細而言，第 一偏光片152可以如圖1是配置於對向基板丨3〇的外表面 上，或是在其他實施例中，第一偏光片152也可以配置於 對向基板130的内表面上。此外，本實施例之第二偏光片 154的配置方式是配置於主動元件陣列基板Η〇的外表面 上，在其他實施例中，也可以在主動元件陣列基板11〇的 内表面上配置第二偏光片154。 液晶顯示面板1〇〇進行晝面顯示時，光學濾光膜 可以使光線經其作用之後呈現高色飽和度。因此，液晶顯 示面板100的顯示品質相當良好。另一方面，當液晶顯示 面板100不進行晝面顯示時，其光學濾光膜13〇可將外界 光線中不含穿透光線波長之光線反射而使液晶顯示面 100具有鏡面的功能。 當然，本發明之液晶顯示面板並不限定於如上所述之 設計。圖3纟會示為本發明之一實施例之液晶顯示器的气面 不意圖。請參㈣3，在此提出本發明之另-種液晶顯示 200848841 WF9511-C202-0572 23497twf.doc/e 面板300，並將其搭配一背光模組310以構成液晶顯示器 320。具體來說，液晶顯示面板300與上述實施例之液晶顯 式面板100大致相同，故相同之元件具有相同之符號，在 此不另作說明。其差異之處在於，液晶顯示面板300中更 包括一可切換式相位差板360，其配置於第一偏光片152 以及光學濾光膜130之間。同時，背光模組310配置於主 動元件陣列基板110下方。Referring to FIG. 1 again, in the embodiment, the liquid crystal display panel 1 further includes a first polarizer 152 and a second polarizer 154, wherein the first polarizer 152 is disposed on the opposite substrate 13 , for example. The second polarizer 154 is disposed, for example, on the active device array substrate 110. In detail, the first polarizer 152 may be disposed on the outer surface of the opposite substrate 如图 3 如图 as shown in FIG. 1 , or in other embodiments, the first polarizer 152 may also be disposed in the opposite substrate 130 . On the surface. In addition, the second polarizer 154 of the embodiment is disposed on the outer surface of the active device array substrate ,. In other embodiments, the second surface of the active device array substrate 11 配置 may be disposed on the inner surface. Polarizer 154. When the liquid crystal display panel 1 is displayed on the face, the optical filter film can cause high color saturation after the light passes through it. Therefore, the display quality of the liquid crystal display panel 100 is quite good. On the other hand, when the liquid crystal display panel 100 is not subjected to the facet display, the optical filter film 13 can reflect the light of the outside light without the wavelength of the transmitted light to make the liquid crystal display surface 100 have a mirror surface function. Of course, the liquid crystal display panel of the present invention is not limited to the design as described above. Fig. 3 is a view showing the gas phase of the liquid crystal display according to an embodiment of the present invention. Referring to (4) 3, a liquid crystal display 200848841 WF9511-C202-0572 23497 tw.doc/e panel 300 of the present invention is proposed and combined with a backlight module 310 to constitute a liquid crystal display 320. Specifically, the liquid crystal display panel 300 is substantially the same as the liquid crystal display panel 100 of the above-described embodiment, and therefore the same elements have the same reference numerals and will not be described again. The difference is that the liquid crystal display panel 300 further includes a switchable phase difference plate 360 disposed between the first polarizer 152 and the optical filter film 130. At the same time, the backlight module 310 is disposed under the active device array substrate 110.
液晶顯示面板300中光學濾光膜130是由兩層半透金 屬層中間夾一層間隙層而構成，其中半透金屬層可以將外 界光線反射而提供鏡面的功能。然而，當背光模組31〇開 啟日守，半透金屬層若將外界光線反射，則會讓使用者觀看 到口口貝不佳的影像。因此，在本實施例中，藉由可切換式 相位差板360的配置，以避免外界光線的反射光線使液晶 顯示器320的顯示品質受到影響。 貝際上，可切換式相位差板360所提供之相位差在〇 與λ/4之間切換。當背光模組31〇開啟時，可切換式相位 差板360之所提供相位差為λ/4，而當背光模組32〇關閉 時，可切換式相位差板36〇所提供之相位差為〇。 *背光模組310開啟時，外界光線進入液晶顯示面板 的路徑如下所述。首先，外界紐會紐過第-偏光 片152而形成具有第—線偏振方向的光波。接著，具有第 方向的光波會先經過可切換式相位差板360，而 L二眭金眉屬層反射，便再度經過可切換式相位差板 。、，原本具有第一線偏振方向的光波因經過兩次可 200848841 WP9511-C202-0572 23497twf.doc/e 切換式相位差板360的作用而轉變成具有第二線偏振方 向。由於，可切換式相位差板360在此所提供的相位差為 λ/4，因此經過可切換式相位差板36〇的作用兩次後，第二 線偏振方向與第一線偏振方向會相交9〇度(具有χ/2相位 差）。如此一來’第二線偏振方向的光波便無法通過第一偏 光片152。也就是說，背光模組31〇開啟時，外界光線的 反射光線不會被使用者看到，而可提高液晶顯示器320的 ^ 顯不對比。值得一提的是，本實施例中可切換式相位差板 360並非額外增添的元件，當背光模組31〇開啟，液晶顯 不為320進行顯示時，可切換式相位差板360所具有之λ/4 相位差係同時作為液晶顯示器320之顯示光學匹配之用。 除此之外，光學濾光膜130的設計是由兩層半透金屬 層中間夾一層間隙層而構成。因此，背光模組310的光線 在經過光學濾光膜13〇時，部份光線會穿透光學濾光膜13〇 而進行顯示’其他部分光線則會被光學濾光膜130反射。 其中’被反射的部分光線可以再進入背光模組310，並且 ^ 被背光模組310中的反射板反射出來，而再次被利用。簡 言之，本發明的液晶顯示器320可以重複利用背光模組310 之光源’因此不但具有高的光線利用率，還可以節省背光 模組310的能源損耗。 系不上所述’本發明之液晶顯示面板以及液晶顯示器至 少具有以下所述之優點： 3 L 本發明之液晶顯示面板及液晶顯示器中，利用光 予;慮光膜進行濾光作用可以達到多彩化且色彩飽和度高的 12 200848841 WP9511-C202-0572 23497twf.doc/e 顯示效果。 2·本發明之液晶顯示面板及液晶顯示器中，不需額 外配置選擇性反射板或是其他光學膜即具有鏡面功能，因 此光線不易被其他膜層遮蔽或是吸收，而具有較高的光線 利用率。 3· 本發明之液日日顯不面板及液晶顯示器中，背光模 組的光線可以反覆被利用，而可提高光線利用率，並進一 步降低背光模組的能源耗損。 4·本發明之液晶顯示面板及液晶顯示器中，藉由可 切換式相位差板的配置，可以避免背光模組開啟時外界光 線同日寸被反射而影響顯示效果。因此，本發明之液晶顯示 面板及液晶顯示器具有良好的顯示對比。 雖然本發明已以實施例揭露如上，然其並非用以限定 本發明，例如可切換式相位差板可以是一液晶盒，該液晶 盒之初始態具有零或四分之—波長（λ/4)之位相差值， 再利用開關切換使其位相差值有或零的轉換，任何所 ，技術領域巾具有通常知識者，在*脫離本發明之精神和 $&圍内’當可作些許之更動與潤飾，因此本發明之保 圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 一圖1繪不為本發明之一實施例之液晶顯示面板的剖面 不意圖。 圖2繪不為本發明之一實施例之光學濾光膜的剖面示 意圖。 13 200848841 11-C202-0572 23497twf.doc/e 圖3繪示為本發明之一實施例之液晶顯示器的剖面示 意圖。 【主要元件符號說明】 100、300 :液晶顯示面板 110 ··主動元件陣列基板 120 :對向基板 130 :光學濾光膜 132 :第一半透金屬層 134 :間隙層 136 :第二半透金屬層 140 :液晶層 152 :第一偏光片 154 :第二偏光片 310 :背光模組 320 ·液晶顯不裔 360 :可切換式相位差板 14The optical filter film 130 of the liquid crystal display panel 300 is formed by sandwiching a gap layer between two layers of semi-transmissive metal layers, wherein the semi-transmissive metal layer can reflect external light to provide a mirror function. However, when the backlight module 31 is turned on and off, the semi-transmissive metal layer reflects the external light, which allows the user to view the image of the mouth. Therefore, in the present embodiment, the configuration of the switchable phase difference plate 360 prevents the reflected light of the external light from affecting the display quality of the liquid crystal display 320. On the cell, the phase difference provided by the switchable phase difference plate 360 is switched between 〇 and λ/4. When the backlight module 31 is turned on, the phase difference provided by the switchable phase difference plate 360 is λ/4, and when the backlight module 32 is turned off, the phase difference provided by the switchable phase difference plate 36 is Hey. * When the backlight module 310 is turned on, the path of external light entering the liquid crystal display panel is as follows. First, the outside world will pass the first-polarizer 152 to form a light wave having a first linear polarization direction. Then, the light wave having the first direction passes through the switchable phase difference plate 360 first, and the L two gold eyebrow layer reflects, and then passes through the switchable phase difference plate again. The light wave originally having the first linear polarization direction is converted into the second linear polarization direction by the action of the switchable phase difference plate 360 which can be used twice by 200848841 WP9511-C202-0572 23497twf.doc/e. Since the phase difference provided by the switchable phase difference plate 360 is λ/4, the second linear polarization direction and the first linear polarization direction intersect after the action of the switchable phase difference plate 36〇 twice. 9 degrees (with χ/2 phase difference). As a result, the light wave of the second linear polarization direction cannot pass through the first polarizer 152. That is to say, when the backlight module 31 is turned on, the reflected light of the external light is not seen by the user, and the contrast of the liquid crystal display 320 can be improved. It is worth mentioning that the switchable phase difference plate 360 in this embodiment is not an additional component. When the backlight module 31 is turned on and the liquid crystal display is not displayed for 320, the switchable phase difference plate 360 has The λ/4 phase difference is also used as the display optical matching of the liquid crystal display 320. In addition, the optical filter film 130 is constructed by sandwiching a gap layer between two layers of semi-transmissive metal layers. Therefore, when the light of the backlight module 310 passes through the optical filter film 13 , part of the light passes through the optical filter film 13 〇 to display 'other portions of the light are reflected by the optical filter film 130 . The portion of the light that is reflected can be re-entered into the backlight module 310, and is reflected by the reflector in the backlight module 310 and used again. In short, the liquid crystal display 320 of the present invention can reuse the light source of the backlight module 310. Therefore, not only has high light utilization efficiency, but also energy consumption of the backlight module 310 can be saved. The liquid crystal display panel and the liquid crystal display of the present invention have at least the following advantages: 3 L In the liquid crystal display panel and the liquid crystal display of the present invention, the light is applied by the light film; 12 and high color saturation 12 200848841 WP9511-C202-0572 23497twf.doc / e display effect. 2. In the liquid crystal display panel and the liquid crystal display of the present invention, the selective reflection plate or other optical film does not need to be additionally provided with a mirror function, so the light is not easily shielded or absorbed by other film layers, and has high light utilization. rate. 3. In the liquid-day display panel and the liquid crystal display of the present invention, the light of the backlight module can be repeatedly used, thereby improving the light utilization rate and further reducing the energy consumption of the backlight module. 4. In the liquid crystal display panel and the liquid crystal display of the present invention, by the arrangement of the switchable phase difference plate, it is possible to prevent the external light line from being reflected at the same time when the backlight module is turned on, thereby affecting the display effect. Therefore, the liquid crystal display panel and the liquid crystal display of the present invention have a good display contrast. Although the present invention has been disclosed above by way of example, it is not intended to limit the invention. For example, the switchable phase difference plate may be a liquid crystal cell having an initial state of zero or quarter-wavelength (λ/4). The difference between the bits, and then use the switch to switch the phase difference with or without zero conversion. Anyone who has the usual knowledge of the technical field can get a little off from the spirit of the invention and the $& The invention is modified and retouched, and therefore the scope of the patent application of the present invention is subject to the definition of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view of a liquid crystal display panel which is not an embodiment of the present invention. Fig. 2 is a cross-sectional view showing an optical filter film which is not an embodiment of the present invention. 13 200848841 11-C202-0572 23497twf.doc/e FIG. 3 is a cross-sectional view showing a liquid crystal display according to an embodiment of the present invention. [Description of main component symbols] 100, 300: liquid crystal display panel 110 · active device array substrate 120 : opposite substrate 130 : optical filter film 132 : first semi-transmissive metal layer 134 : gap layer 136 : second semi-transmissive metal Layer 140: liquid crystal layer 152: first polarizer 154: second polarizer 310: backlight module 320 · liquid crystal display 360: switchable phase difference plate 14