201031969 六、發明說明： 【發明所屬之技術領域】 本發明關於一種影像顯示裝置，尤其關於一種具有多種 顯示模式切換功能的影像顯示裝置。 【先前技術】 圖1為示意圖，顯示利用視差光件(parallax optics)自動 φ 產生立體影像的一習知影像顯示裝置1〇〇。如圖1所示，該 影像顯示裝置100包含一液晶面板102、一視差障壁基板 (parallax barrier plate)104及一背光模組116。視差障壁基板 104係由一玻璃基板118及形成於玻璃基板118上的複數條 紋式遮光部120所構成，其與液晶面板102表面接觸作為分 離左右眼影像之光分離元件。液晶面板102於玻璃基板1〇6 及108之間形成一液晶層110。觀察者122側(光出射側)之玻 φ 璃基板106設置有偏光板112，背光模組116側(光入射侧) 設置有偏光板114。如圖1所示，習知自動產生立體影像的 方式’係將左眼用影像及右眼用影像於液晶層中以交互間隔 一 的方式顯示，當光線由背光模組116發出後，穿透左眼用影 像及右眼用影像的光線可藉由視差障壁基板1〇4相互分離， 使觀察者122之左眼僅觀察到左眼用影像而右眼僅觀察到右 眼用影像，產生視差效果而使觀察者122自動感知一立體影 像。然而’此一設計僅能使影像顯示裝置1〇〇呈現立體三維 4 201031969 (3D)顯不，而無法於平面二維(2D)顯示及立體三維(3d)顯示 模式間進行切換。 另一方面，若於背光模組116與液晶面板1〇2設置一光準 直元件(圖未示），可使具大視角的光線無法通過而呈現窄視 一 肖顯示效果，但卻無法於窄視賴式與廣視減式間進行切 . 換右要獲#控制視角的效果，需在液晶面板1Q2的液晶層 内部提供_液晶分子轉向的結構，而該結構的製造過程相 ❿ 當複雜。 【發明内容】 本發明-實施例提供_種具有乡_示模式切換功能 的影像顯示裝置及其光馳織置。本發&實施例提供一 種具有多種顯示模式切換功能的影像顯示裝置及其光源控 制裝置，其從第-顯示模式切換至第二顯示模科，兩模式 • _顯示亮度差異較小。本發明—實施例提供-種具有平面 -維(2D)/立體二維(3D)顯示模式切換功能；或窄視角/寬視角 顯示模式切換功能的影像顯示裝置及其光源控制裝置。 • 财發狀-實關’―種·顯稀置適於呈現相異 的-第-顯示模式及-第二顯示模式且包含—顯示面板、一 背光模組、-光路改變元件及一切換式光擴散元件。背光模 纽對向顯示面板設置，且f光模組發出之光線作為顯示面板 之顯示光源，光路改變元件設置於顯示面板與背光模組之間 5 201031969 並改變此光線的光路，以配合顯示面板而產生第一顯示模 式。切換式光擴散元件設置於光路改變元件與顯示面板之 間，切換式光擴散元件具有不散射進入其中之光線的一透明 模式及散射進入其中之光線的一散射模式，於透明模式下影 像顯示裝置呈現第一顯示模式，且於散射模式下影像顯示裝 ' 置呈現第二顯示模式。 」 依本發明之一實施例，背光模組係依據切換式光擴散元 • 件呈現透明模式或散射模式，選擇性地呈現一第一亮度模式 或一第二亮度模式。更具體而言，切換式光擴散元件適於接 受一第一電壓而呈透明模式且適於接受一第二電壓而呈散 射模式。較佳地，切換式光擴散元件接受第一電壓時，背光 模組接受一第二電屢；切換式光擴散元件接受第二電愿時， 背光模組接受一第四電壓。於一實施例中，影像顯示裝置更 包含一第一電源控制器及一第二電源控制器。第一電源控制 參 器選擇性地提供第一電壓或第二電壓；而第二電源控制器選 擇性地提供第三電壓或第四電壓。 依本發明之一實施例，影像顯示裝置更包含一光感測 器。光感測器用以感測通過切換式光擴散元件之光線的一測 置亮度，其中背光模組依據測量亮度呈現相異的亮度模式。 較佳地，影像顯示裝置更包含—第二電源控制器。第二電源 控制器依據測量亮度提供相異的電壓給背光模組。 依本發明之一實施例，光路改變元件為一視差光件。視 6 201031969 差光件用以產生視覺分離效果，且第—顯示模式為立體三維 顯示模式；而第二顯示模式為平面二維顯示模式。 依本發明之-實酬，姐改變元件為—鮮直元件。 光準直元件用以準直背紐組發出之絲，且第—顯示模式 .纟見窄視角顯7F模式，而第二顯示模式呈現廣視角顯示模 式。 基於上述各實酬之設計可知，轉明—實施例能夠提 • ❺一種具有多種顯示模式切換功能的影像顯示裝置。 依本發明之另-實施例，一種光源控制裝置設置於一顯 不面板及提供顯不面板的―絲之間。光源控繼置依開啟 及關閉兩種獨狀態^具有—第—模式及—第二模式，於該 第模式下可令已準直或分離之光線以不改變其原先行進 路仏方式通過’於料二模式下可散射已準直或分離之光線 而變化其原先行進路徑，其中第一模式對應顯示面板之一立 ❹ 體三維顯示模式或一窄視角顯示模式，且第二模式對應顯示 面板之-平面二維顯示模式或一廣視角顯示模式。基於上述 - 之設計可知，藉㈣—_式錢散元件作為光源控 . 制裝置’並設置於—顯示面板及提供顯示面板的光源間，當 光源控制裝置依開啟及關閉兩種不同狀態而具有一第一模 式及-第二模式，於第—模式下可令已準直或分離之光線以 不改變其原先行進路徑方式通過，於第二模式下可散射已準 直或分離之光線而變化其縣行進路徑，可使—影像顯示裝 7 201031969 置具有平面二維(2〇)/立體三維⑽顯示模式切換功能以提 供不=覺效果’且具”視㈣視_補式切換功能使 顯不資訊具有例如公職示或賴隱私的不同用途。 本發明的其他目的和伽可峨本翻所揭露的技術 特徵中制進—步的了解。為縣發明之上述样他目的、 特徵和優點缺明顯紐，下文特舉實施例並配合所附圖 式，作詳細說明如下。 癱 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在以 下配合參相式之實施例的詳細說财，將可清楚的呈現。 以下實施例中所提到的方向用語，例如：上、下、左、右、 前或後等，僅是參相加圖式的方向。因此，使㈣方向用 語是用來說明並非用來限制本發明。 圖2A及圖2B為顯示依本發明一實施例之影像顯示裝置 10不思圖，其中圖2八示意一平面二維(2〇)顯示模式且圖迚 不意-立體三維卿顯示模式’即影像顯示裝置1()可於犯 及3D顯示模式間進行切換。請參照圖2A及圖2b，影像顯 不裝置10包含一顯示面板12、一背光模組14、一視差光件 (pamllax optics)16及一切換式光擴散元件（撕此^^ diffilSer)18。背光模組14對向顯示面板12設置，且背光模組 14發出之光線I作為顯示面板12之顯示光源。視差光件π 8 201031969 設置於顯示面板12與背光模組14之間以產生視覺分離效 果。於本實施例中’視差光件16為一視差障壁基板22(parallax barrier plate)，視差障壁基板22具有交替排列的複數透光區 塊22a及不透光區塊22b。當光線I由背光模組14發出後， 穿透左眼用影像及右眼用影像之光線可藉由視差障壁基板 22相互分離，使觀察者32的左眼僅觀察到左眼用影像而右 眼僅觀察到右眼用影像’產生視差效果而使觀察者2〇感知 ❿ 一立體影像。切換式光擴散元件18設置於視差障壁基板22 與顯示面板12之間。於本實施例中，切換式光擴散元件18 開啟(ON)時被施加電壓而呈透明狀態，且切換式光擴散元件 18關閉(OFF)時未被施加電壓而呈現有霧度（Haze)狀態。 於另外一種實施方式中，切換式光擴散元件18也可於開啟 (ON)時未被施加電壓而呈透明狀態，於關閉(〇1；1?)時有被施 加電壓而呈現有霧度狀態。因此，如圖2A所示，當切換式 參 光擴散元件18關閉時，由視差障壁基板22相互分離的光線 被有霧度的切換式光擴散元件18打亂，如此進入觀察者2〇 的光線即不具視覺分離效果使該影像顯示裳置1〇呈現平面 ’ 二維㈣顯示。另-方面’如圖2B所示，當切換式光擴散 元件1㈣啟時，由視差障壁基板22相互分離的光線可依原 路徑通過透_讀式域散元件18科受料，如此進 入觀察者2〇的光線具概分雜果使該輯齡裝置川呈 現立體三維(3D)顯示。 9 201031969 於一實施例中，影像顯示裝置10可以更包含一第一電 壓控制器24。第一電壓控制器24耦接於切換式光擴散元件 18並選擇性地提供切換式光擴散元件18 一第一電壓或一第 二電壓。切換式光擴散元件18適於接受第一電壓而呈透明 模式且適於接受第二電壓而呈散射模式。較佳地，此第二電 壓為零’使得切換式光擴散元件18接受第一電壓時被開啟； 接觉係為零的第一電壓亦即未接受任何電壓時被關閉。 參 切換式光擴散元件18由呈透明模式轉換為散射模式 時’會造成影像顯示裝置10之正向的顯示亮度降低，而使 人眼感覺到瞬間顯示亮度變化，且變化後造成顯示亮度下 降’影響顯示品質。於-實施例中’依據切換式光擴散元件 18呈現透式紐射模式，使該f光触14聰性地呈 現一第-亮度模式或-第二亮度模式。較佳地，使第二亮度 模式的紐大於第-亮賴柄亮度。因此，_式光紐 兀件18從透明模式切換至散射模式時，背光模組14亦從第 一亮度模式切換至第二亮度模式，除了能夠降低人眼察覺到 =示;置1〇顯示亮度的變化之外，尚能夠補償切換式 、兀之散射模式所造成之光線能量的損失使 ==亮度獲得補償改善顯示品f。相反地，切換式光擴 ^ 散射模式切換蝴模鱗，細組Η亦從 第—級模式，_降低人眼察覺到影 像顯不裝置iG顯轉度_化，咐善顯示品質。 201031969 於一實施例中’影像顯示裝置ίο亦可以更包含一第二 電愿控制器24a。第二電壓控制器24a耦接背光模組14，當 切換式光擴散元件18接受第一電壓時，第二電壓控制器24a 提供一第三電壓使背光模組14接受第三電壓以呈現第一亮 度模式’·當切換式光擴散元件18接受第二電壓時，第二電 壓控制器24a和：供一第四電壓使背光模組14接受第四電壓以 呈現第二亮度模式。較佳地，係使第四電壓大於第三電壓。 Φ 於一實施例中，切換式光擴散元件18可為一高分子散 佈形液晶(polymer dispersed liquid crystal; PDLC)面板或雙穩 態膽固醇液晶(bi-stable cholesteric liquid crystal)面板。 圖3A及圖3B為本發明另一實施例之示意圖，說明視差 障壁基板採用具反射特性之不透光區塊所帶來的功效。形成 視差障壁基板22的不透光區塊22b的材質並不限定，例如 可為金屬材質、塑膠材質或油墨材料。請參照圖3A及圖3B， ❿當視差障壁基板22的不透光區塊22b採用具反射特性的材 質，例如金屬材質形成時，被不透光區塊22b遮擋的光線IR 可反射回背光模組14中，再經由背光模組14反射後往視差 ， 障壁絲22的方向出光，這樣可以將原本會被吸收掉的光 線予以回收再利用，達到提高出光效率的效果。 再者，本發明提供視覺分離效果的視差光件並不限定為 -視差障壁基板22 ’例如亦可為單—聚焦透鏡組26(圖4)或單 -柱狀透鏡組28(圖5)，單-聚焦透鏡組26由多個聚焦透鏡結 11 201031969 構26a所組成，單一柱狀透鏡組μ由多個柱狀透鏡結構28a所 組成。當然，亦可將聚焦透鏡結構2如及柱狀透鏡結構28a混 合形成於同一視差光件16中，且聚焦透鏡結構26a或柱狀透鏡 結構28a可排列於同-視差光件16的頂面或底面、或者同時形 成於同一視差光件16的頂面及底面。 圖6A及圖6B為顯示依本發明另一實施例之影像顯示裝 置30不意圖，其中圖6八示意一廣視角顯示模式且圖6B示意一 馨 窄視角顯示模式，即影像顯示裝置30可於廣視角及窄視角顯 示模式間進行切換。請參照圖6A及圖6B，影像顯示裝置3〇 包含一顯示面板32、一背光模組34、一光準直元件36及一切 換式光擴散元件38。背光模組34對向顯示面板32設置，且背 光模組34發出之光線I作為顯示面板32之顯示光源。光準直元 件36设置於顯示面板32與背光模組34之間，以提供將光線I 準直的效果。光準直元件36例如可為單一柱狀透鏡組52(圖 . 7)、單一柱狀稜鏡組54(圖8)或光障壁基板56(圖9)等，或者可 將柱狀透鏡結構52a及柱狀稜鏡結構54a混合形成於同一光準 直元件36中（圖1〇、圖^)，且柱狀透鏡結構52a及柱狀棱鏡 結構54a可排列於同一光準直元件36的頂面或底面、或者同時 形成於同一光準直元件36的頂面及底面(圖10)。切換式光擴 散元件38設置於光準直元件36與顯示面板32之間，於本實施 例中’當切換式光擴散元件38開啟(ON)時被施加電壓而呈透 明狀態，當切換式光擴散元件38關閉(OFF)時未被施加電壓 12 201031969 而呈現有霧度狀態。於另外一種實施方式中，切換式光擴散 元件38也可於開啟(ON)時未被施加電壓而呈透明狀態，於關 閉(OFF)時有被施加電壓而呈現有霧度（Haze)狀態。因此， 如圖6A所示，背光模組34發出的光線經過光準直元件36準直 後可使具大視角的光線無法通過而呈現窄視角的效果，然 而，當切換式光擴散元件38關閉時，有霧度的切換式光擴散 元件38可散射光線使視角增大，使影像顯示裝置列呈現廣視 ❹ 角顯示模式。另一方面，如圖6B所示，背光模組34發出的光 線經過光準直元件36準直後可使具大視角的光線無法通過 而呈現窄視角的效果，而當切換式光擴散元件38開啟時，窄 視角的光線可依原路徑通過透明的切換式光擴散元件38而 不受影響，使影像顯示裝置3〇呈現窄視角顯示模式。 於一實施例中，影像顯示裝置3〇可以更包含一第一電 壓控制器44。第-電壓控制H 44減於切換式絲散元件 ❿ 18並選雜地提供城式光錄元件38 -帛-電壓或一第 • 。切換式絲散元件38適於接受第—賴而呈透明 模式且適於接受第二電壓而呈散射模式。較佳地，此第二電 ‘ 壓為零’使得切換式鎌散树38接受第—電壓時被開啟； 接受係為零的第二電壓卿未接受任何電壓時被關閉。 切換式光擴散元件38由呈透明模式轉換為散射模式 時’會造成影像顯示裝置30之正向的顯示亮度降低，而使 人眼感覺到瞬間顯示亮度變化，且變化後造成顯示亮度下 13 201031969 降，影響顯示品質。於-實施例中，依據切換式光擴散元件 38呈現透明模<或散射模式，使背光模組％選擇性地呈現 -第-亮度模式或-第二亮度模式。較佳地，使第二亮度模 式的亮度大於第-亮度模式的亮度。因此，切換式光擴散元 ^ 件38從透明模式切換至散射模式時，背光模組34亦從第- 党度模式切換至第二亮度模式’除了能夠降低人眼察覺到影 • 賴示裝置3G顯示亮度_化之外，尚賴補償切換式光 β 擴散元件38之散射模式所造成之光線能量的損失，使得正 向顯示亮度獲得補償改善顯示品質。相反地，切換式光擴散 元件38從散射模式切換至透明模式時，背光模组％亦從第 -党度模式切換至第—亮麵式，麟降低人眼察覺到影像 顯不裝置30顯示亮度的變化，而改善顯示品質。 於一實施例中，影像顯示裝置3〇亦可以更包含一第二 電屢控制器44a。第二電麼控制器44a耦接背光模組％，當 ❿ 切換式光擴散元件％接受第-電麼時，第二電壓控制器· 提供一第三電麼使背光模組34接受第三電|以呈現第一亮 度模式，當切換式光擴散元件38接受第二電壓時，第二電 壓控帝i器44a提供一第四電壓使背光模組44接受第四電壓以 呈現第一壳度模式。較佳地，係使第四電壓大於第三電壓。 ；圖UA及圖12；8為本發明另一實施例之示意圖，說明光 準直几件採用具反射特性之不透光區塊所帶來的功效。當光 準直7L件為一光障壁基板56時，形成光障壁基板允的不透 201031969 光區塊56b的材質並不限定，例如可為金屬材質、塑膠材質 或油墨材料。請參顯12A及圖12β，當光賴基板兄的 不透光區塊56b採用具反射特性的材質，例如金屬材質形成 時，被不透光區塊56b遮播的大視角光線ir可反射回背光 模組34中，再經由背光模組34往上出光，達到提高出光效 率的效果。 • 由前述本發明各個實施例的設計可知，藉由將-切換式 ❹ 賴散元件作為光馳繼置，麵置於-顯示面板及提供 顯示面板的光源間，當光源控制裝置依開啟及關閉兩種不同 狀態而具有一第一模式及一第二模式，於第一模式下可令已 準直或分離之光線以不改變其原先行進路裡方式通過，於第 二模式下可散射已準直或分離之光線而變化制先行進路 徑’可使-影像顯示裝置具有平面二維(2D)/立體三維㈣顯 示模式切換功能以提供不同視覺效果，且具有窄視角/寬視角 ❹ 齡模式城魏賴示資訊具有修公示或保護隱 私的不同用途。 由前述本發明各個實施例的設計可知， •…影像顯示裝置不限定於包含-視差光件準= 件。影像顯示裝置可以包含為_光路改變元件，用以改變背 光模組發出之光線的光路，以配合顯示面板而產生一第一顯 示模式。前述各個實施例之一視差光件或一光準直元件僅是 光路改變元件的—實酬，光路改變元件可以為現有或未來 15 201031969 發展之改變背光模組發出之光線的光路以配合顯示面板而 產生一顯示模式的元件。 圖13為顯示依本發明另一實施例之影像顯示裝置30a的 示意圖。圖13之實施例相似於圖68之實施例，因此相同的元 件使用相同的符號，並省略相同部分的說明，以下僅說明兩 實施例相異的部分。 請參照圖13 ’影像顯示裝置3〇a包含一顯示面板％、一背 光模組34、一光路改變元件35、一光感測器45a及一切換式光 擴散元件38。於本實施例中，光路改變元件％係為一光準直 7L件36 ’因此影像顯稍置3崎於廣視肖及窄視肖顯示模式 間進行切換。於一實施例中光路改變元件35亦可為一視差光 件。光感測器45喊於切換式光擴散元件38的出光側，用以感 測通過切換式光擴散元件38之光線的一測量亮度。於本實施 例’光感測H45a係設於面對顯示面板32_換式光擴散元件 38之-侧’且介於顯示面板32與切換式光擴散元件爛。於 另-實施例中’光感測||45&可以設於顯示面板32之出光側 (圖未示）。 此外光模組34依據光感測器祝所測得的測量亮度呈 現相異的亮度模式。更具體說明，切換式光擴散元件38由呈 透明模式雜綠賴式時，會造成影軸稀置％的顯示 亮度降低’因此光感測器祝所測得的測量亮度亦從一第一水 平變成-低於此第-水平的第二水平。背光歡34接收測量 16 201031969 亮度後得知此測量亮度賴化，亦H亮賴式轉換至 一第二亮賴式，其巾第二亮賴式的亮度大於第一亮度模 式的亮度。於-實施射，影像顯示裝置3轉可以更包含一 第二電壓控制器44a。第二電壓控制器4蝴接背光模組规 光感測lf45a，第二電壓控制器44a接收測量亮度依據測量亮 • 舰供相異的電躲背光模組34。更具體而言，當光感測器 45a所測得的測量冗度為第—水平時，第二電壓控制器糾&提 ❿ 供第電壓使背光模組34接受第三電壓以呈現第-亮度 模式；當光感測器45a所測得的測量亮度為第二水平時，第二 電壓控制器44a提供-第四電壓使背光模組44接受第四電廢 以呈現第二亮度模I由於第二水平低於第—水平，因此較 佳地係使第四電壓大於第三電壓。 造成影細示裝置30之正向的顯示亮度降低的原因，例 如還有背光模組34的老化。她於_之實施例，本實施例 ⑩ 因設有域 4城_得因背絲㈣老化所造成的顯 示亮度降低，並能_對應地提升提供給背級㈣的電壓 ' 使背細組34顯示較高的亮度，目此影細示裝置3Ga能狗呈 - 現較穩定顯示焭度，而具有較高的顯示品質。 雖然本發曝佳實施_露如上，然其並_以限定本 發明’任何熟習此技藝者’在不脫離本發明之精神和範圍 内，當可作些許之更動與潤飾，因此本發明之保護範圍當視 後附之申請專利範圍所界定者為準。另外，本發明的任:實 17 201031969 施例或中請專利範私須達成本發明所聽之 優點或特點。此外，摘要部分和標題僅是_助目^ 搜尋之用，並非用來限制本發明之權利範圍。和文件 【圖式簡單說明】 -習=:置顯示_視差光件自動產一的201031969 VI. Description of the Invention: [Technical Field] The present invention relates to an image display device, and more particularly to an image display device having a plurality of display mode switching functions. [Prior Art] Fig. 1 is a schematic view showing a conventional image display device 1 that automatically generates φ images using parallax optics. As shown in FIG. 1, the image display device 100 includes a liquid crystal panel 102, a parallax barrier plate 104, and a backlight module 116. The parallax barrier substrate 104 is composed of a glass substrate 118 and a plurality of stripe-type light-shielding portions 120 formed on the glass substrate 118, and is in contact with the surface of the liquid crystal panel 102 as a light separating element for separating left and right eye images. The liquid crystal panel 102 forms a liquid crystal layer 110 between the glass substrates 1 and 6 and 108. The glass substrate 106 of the viewer 122 side (light exit side) is provided with a polarizing plate 112, and the polarizing plate 114 is provided on the backlight module 116 side (light incident side). As shown in FIG. 1 , the conventional method for automatically generating a stereoscopic image is to display the left-eye image and the right-eye image in the liquid crystal layer in an alternate interval, and when the light is emitted by the backlight module 116, the light penetrates. The light for the left-eye image and the right-eye image can be separated from each other by the parallax barrier substrate 1〇4, so that only the left-eye image is observed in the left eye of the observer 122, and only the right-eye image is observed in the right eye, and the parallax is generated. The effect is such that the viewer 122 automatically perceives a stereoscopic image. However, this design can only enable the image display device 1 to display stereoscopic three-dimensional 4 201031969 (3D) display, and cannot switch between planar two-dimensional (2D) display and stereoscopic three-dimensional (3d) display mode. On the other hand, if a light collimating element (not shown) is disposed on the backlight module 116 and the liquid crystal panel 1〇2, the light having a large viewing angle cannot pass through and exhibits a narrow-viewing effect, but cannot be The narrow view and the wide view subtraction are performed. For the effect of controlling the angle of view, it is necessary to provide a structure of liquid crystal molecular steering inside the liquid crystal layer of the liquid crystal panel 1Q2, and the manufacturing process of the structure is complicated. . SUMMARY OF THE INVENTION The present invention provides an image display device having a home mode display mode switching function and its optical knitting. The present embodiment provides an image display device having a plurality of display mode switching functions and a light source control device thereof, which switch from the first display mode to the second display mode, and the two modes • _ display brightness difference is small. The present invention provides an image display device having a planar-dimensional (2D)/stereoscopic two-dimensional (3D) display mode switching function or a narrow viewing angle/wide viewing angle display mode switching function and a light source control device therefor. • Finance-real--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Light diffusing element. The backlight module is disposed opposite to the display panel, and the light emitted by the f-light module is used as the display light source of the display panel, and the optical path changing component is disposed between the display panel and the backlight module 5 201031969 and changes the light path of the light to match the display panel The first display mode is generated. The switching light diffusing element is disposed between the optical path changing element and the display panel, the switching light diffusing element has a transparent mode that does not scatter the light entering the light diffusing mode and a scattering mode of the light that scatters therein, and the image display device in the transparent mode The first display mode is presented, and in the scattering mode, the image display device presents a second display mode. According to an embodiment of the invention, the backlight module selectively presents a first brightness mode or a second brightness mode according to the switching mode light diffusing element exhibiting a transparent mode or a scattering mode. More specifically, the switched light diffusing element is adapted to accept a first voltage in a transparent mode and to accept a second voltage in a scatter mode. Preferably, when the switching light diffusing element receives the first voltage, the backlight module receives a second electrical frequency; and when the switching light diffusing component receives the second electrical power, the backlight module receives a fourth voltage. In an embodiment, the image display device further includes a first power controller and a second power controller. The first power control parameter selectively provides a first voltage or a second voltage; and the second power controller selectively provides a third voltage or a fourth voltage. According to an embodiment of the invention, the image display device further comprises a light sensor. The light sensor is configured to sense a measured brightness of the light passing through the switching light diffusing element, wherein the backlight module presents a different brightness mode according to the measured brightness. Preferably, the image display device further comprises a second power controller. The second power controller provides a different voltage to the backlight module based on the measured brightness. According to an embodiment of the invention, the optical path changing element is a parallax light element. Vision 6 201031969 The light difference component is used to generate a visual separation effect, and the first display mode is a stereoscopic three-dimensional display mode; and the second display mode is a planar two-dimensional display mode. According to the invention - the actual reward, the sister changes the component to - fresh straight components. The light collimating element is used to collimate the wire emitted by the back button group, and the first display mode sees the narrow viewing angle display 7F mode, and the second display mode exhibits the wide viewing angle display mode. Based on the design of the above-mentioned various remunerations, it can be seen that the embodiment of the invention can provide an image display device having a plurality of display mode switching functions. In accordance with another embodiment of the present invention, a light source control device is disposed between a display panel and a wire that provides a display panel. The light source control relays the two independent states according to the opening and closing modes. The first mode has a first mode and a second mode. In the first mode, the collimated or separated light can be passed through without changing its original traveling path. In the second mode, the collimated or separated light can be scattered to change the original traveling path, wherein the first mode corresponds to one of the display panel and the third perspective display mode or the narrow viewing angle display mode, and the second mode corresponds to the display panel. - A planar two-dimensional display mode or a wide viewing angle display mode. Based on the above-mentioned design, it is known that the (four)----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- a first mode and a second mode, in the first mode, the collimated or separated light can be passed without changing its original traveling path, and in the second mode, the collimated or separated light can be scattered to change. The county travel path can be used to display the image display device 7 201031969 with a planar two-dimensional (2 〇) / stereo three-dimensional (10) display mode switching function to provide a non-conscious effect 'and with a visual (four) view _ complement switching function to display The non-information has different uses such as public service or privacy. The other objects of the present invention and the understanding of the technical features disclosed in the gag. The following detailed description of the embodiments and the accompanying drawings will be described in detail below. 实施 [Embodiment] The foregoing and other technical contents, features and effects of the present invention are The detailed description of the embodiment of the following phase-matching formula will be clearly presented. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only The direction of the drawings is therefore intended to be illustrative and not to limit the invention. FIG. 2A and FIG. 2B are diagrams showing an image display device 10 according to an embodiment of the invention, wherein FIG. The planar two-dimensional (2〇) display mode and the image is unintentional - the stereoscopic three-dimensional display mode, that is, the image display device 1 () can switch between the 3D display mode and the 3D display mode. Please refer to FIG. 2A and FIG. 2b, the image display device 10 includes a display panel 12, a backlight module 14, a parallax optical component (pmllax optics) 16 and a switching light diffusing component (tear the diffilSer) 18. The backlight module 14 is disposed opposite the display panel 12, and The light I emitted by the backlight module 14 serves as a display light source of the display panel 12. The parallax light member π 8 201031969 is disposed between the display panel 12 and the backlight module 14 to produce a visual separation effect. In the present embodiment, the parallax light member 16 a parallax barrier substrate 22 (parallax ba The barrier magnetic barrier substrate 22 has a plurality of transparent light-transmissive blocks 22a and opaque blocks 22b arranged alternately. When the light I is emitted by the backlight module 14, the light for the left-eye image and the right-eye image is penetrated. The parallax barrier substrate 22 can be separated from each other such that only the left-eye image is observed by the left eye of the observer 32, and only the right-eye image is observed by the right eye to generate a parallax effect, so that the observer 2 〇 perceives a stereoscopic image. The switching light diffusing element 18 is disposed between the parallax barrier substrate 22 and the display panel 12. In the present embodiment, the switching light diffusing element 18 is transparent when a voltage is applied when the switching light diffusing element 18 is turned on (ON), and the switching light diffusing element When 18 is OFF, no voltage is applied and a haze state is exhibited. In another embodiment, the switching light diffusing element 18 can also be in a transparent state when no voltage is applied when it is turned on, and is applied with a voltage when it is turned off (〇1; 1?). . Therefore, as shown in FIG. 2A, when the switching type light-diffusing element 18 is turned off, the light beams separated from each other by the parallax barrier substrate 22 are disturbed by the hazy switching light-diffusing element 18, thus entering the light of the observer 2 That is, there is no visual separation effect, so that the image display is set to 1 〇 presentation plane 'two-dimensional (four) display. In another aspect, as shown in FIG. 2B, when the switching light diffusing element 1 (4) is turned on, the light separated from each other by the parallax barrier substrate 22 can be received by the through-reading domain element 18 according to the original path, thus entering the observer. The 2 〇 light has an outline and a miscellaneous fruit to make the stereoscopic device (3D) display. 9 201031969 In an embodiment, the image display device 10 may further include a first voltage controller 24. The first voltage controller 24 is coupled to the switching light diffusing element 18 and selectively provides the switched light diffusing element 18 with a first voltage or a second voltage. The switched light diffusing element 18 is adapted to accept the first voltage in a transparent mode and to accept the second voltage in a scattering mode. Preferably, the second voltage is zero' such that the switched light diffusing element 18 is turned on when the first voltage is received; the first voltage that is zero is sensed, i.e., when no voltage is received. When the switching light diffusing element 18 is switched from the transparent mode to the scattering mode, the display brightness of the image display device 10 in the forward direction is lowered, and the human eye feels the instantaneous display brightness change, and the display brightness is lowered after the change. Affects display quality. In the embodiment, the transmissive light diffusing element 18 exhibits a transmissive shot mode, such that the f-light touch 14 intelligently exhibits a first-luminance mode or a second brightness mode. Preferably, the ridge of the second brightness mode is made larger than the brightness of the first illuminating handle. Therefore, when the _ type light button 18 is switched from the transparent mode to the scattering mode, the backlight module 14 is also switched from the first brightness mode to the second brightness mode, in addition to being able to reduce the human eye to detect the display; In addition to the change, it is still possible to compensate for the loss of light energy caused by the switching mode and the scattering mode of the 使, so that the == brightness is compensated to improve the display product f. Conversely, the switched optical divergence mode switches the butterfly scale, and the fine group also changes from the first-level mode, _ reduces the human eye to the image display device iG display degree _, and displays the quality. 201031969 In an embodiment, the image display device ίο may further include a second power controller 24a. The second voltage controller 24a is coupled to the backlight module 14. When the switching light diffusing element 18 receives the first voltage, the second voltage controller 24a provides a third voltage to cause the backlight module 14 to receive the third voltage to present the first Luminance Mode '. When the switching light diffusing element 18 receives the second voltage, the second voltage controller 24a and: a fourth voltage causes the backlight module 14 to accept the fourth voltage to assume the second brightness mode. Preferably, the fourth voltage is greater than the third voltage. Φ In one embodiment, the switching light diffusing element 18 can be a polymer dispersed liquid crystal (PDLC) panel or a bi-stable cholesteric liquid crystal panel. 3A and 3B are schematic views showing the effect of the opaque block having a reflective property on the parallax barrier substrate according to another embodiment of the present invention. The material of the opaque block 22b forming the parallax barrier substrate 22 is not limited, and may be, for example, a metal material, a plastic material or an ink material. Referring to FIG. 3A and FIG. 3B, when the opaque block 22b of the parallax barrier substrate 22 is made of a material having a reflective property, such as a metal material, the light IR blocked by the opaque block 22b can be reflected back to the backlight mode. In the group 14, the backlight module 14 reflects the parallax and the light in the direction of the barrier wire 22, so that the light that would otherwise be absorbed can be recovered and reused, thereby improving the light-emitting efficiency. Furthermore, the parallax light piece of the present invention providing the visual separation effect is not limited to the parallax barrier substrate 22', for example, the single-focus lens group 26 (FIG. 4) or the single-column lens group 28 (FIG. 5). The single-focus lens group 26 is composed of a plurality of focus lens junctions 11 201031969, and a single lenticular lens group μ is composed of a plurality of lenticular lens structures 28a. Of course, the focusing lens structure 2 and the lenticular lens structure 28a may be mixed and formed in the same parallax light member 16, and the focusing lens structure 26a or the lenticular lens structure 28a may be arranged on the top surface of the same-parallax light member 16 or The bottom surface or the top surface and the bottom surface of the same parallax light member 16 are simultaneously formed. FIG. 6A and FIG. 6B are schematic diagrams showing an image display device 30 according to another embodiment of the present invention, wherein FIG. 6-8 illustrates a wide viewing angle display mode and FIG. 6B illustrates a sweet and narrow viewing angle display mode, that is, the image display device 30 can be Switch between wide viewing angle and narrow viewing angle display mode. Referring to FIGS. 6A and 6B, the image display device 3A includes a display panel 32, a backlight module 34, a light collimating element 36, and all of the light diffusing elements 38. The backlight module 34 is disposed opposite to the display panel 32, and the light I emitted by the backlight module 34 is used as a display light source of the display panel 32. The light collimating element 36 is disposed between the display panel 32 and the backlight module 34 to provide an effect of collimating the light I. The light collimating element 36 may be, for example, a single cylindrical lens group 52 (FIG. 7), a single cylindrical group 54 (FIG. 8) or a light barrier substrate 56 (FIG. 9), or the like, or the cylindrical lens structure 52a may be used. The columnar crucible structure 54a is mixed and formed in the same light collimating element 36 (Fig. 1A, Fig. 2), and the lenticular lens structure 52a and the columnar prism structure 54a are arranged on the top surface of the same optical collimating element 36. The bottom surface or the bottom surface or the bottom surface of the same light collimating element 36 (Fig. 10). The switching light diffusing element 38 is disposed between the light collimating element 36 and the display panel 32. In the present embodiment, when the switching light diffusing element 38 is turned on (ON), a voltage is applied to be transparent, when the switching light is switched. When the diffusing element 38 is turned off (OFF), the voltage is not applied 12 201031969 and the haze state is exhibited. In another embodiment, the switching light diffusing element 38 may be in a transparent state when no voltage is applied when it is turned on, and a haze state when a voltage is applied when it is turned off (OFF). Therefore, as shown in FIG. 6A, the light emitted by the backlight module 34 is collimated by the light collimating element 36, so that the light having a large viewing angle cannot pass through and exhibits a narrow viewing angle. However, when the switching light diffusing element 38 is turned off, The hazy switching light diffusing element 38 can scatter light to increase the viewing angle, so that the image display device array exhibits a wide viewing angle display mode. On the other hand, as shown in FIG. 6B, the light emitted by the backlight module 34 is collimated by the light collimating element 36, so that the light having a large viewing angle cannot pass through and exhibits a narrow viewing angle, and when the switching light diffusing element 38 is turned on. When the light of the narrow viewing angle is passed through the transparent switching light diffusing element 38, the image display device 3 〇 exhibits a narrow viewing angle display mode. In an embodiment, the image display device 3 can further include a first voltage controller 44. The first-voltage control H 44 is reduced from the switched-type filament element ❿ 18 and the ground-type optical recording element 38 - 帛-voltage or a first is provided. Switching dispersive element 38 is adapted to accept a first mode in a transparent mode and to accept a second voltage in a scattering mode. Preferably, the second electrical voltage is zero so that the switched divergence tree 38 is turned on when the first voltage is received; and the second voltage receiving zero is closed when no voltage is received. When the switching light diffusing element 38 is switched from the transparent mode to the scattering mode, the display brightness of the positive direction of the image display device 30 is lowered, and the human eye feels the instantaneous display brightness change, and the display brightness is caused by the change 13 201031969 Drop, affecting display quality. In an embodiment, the transparent mode <or scattering mode is employed in accordance with the switched light diffusing element 38 such that the backlight module selectively presents a -first brightness mode or a second brightness mode. Preferably, the brightness of the second brightness mode is made greater than the brightness of the first brightness mode. Therefore, when the switching light diffusing element 38 is switched from the transparent mode to the scattering mode, the backlight module 34 is also switched from the first-party mode to the second brightness mode, in addition to reducing the human eye and detecting the image. In addition to the display luminance, the loss of light energy caused by the compensation of the scattering mode of the switched-type optical beta diffusing element 38 is compensated for, so that the forward display luminance is compensated for improved display quality. Conversely, when the switching light diffusing element 38 is switched from the scattering mode to the transparent mode, the backlight module % is also switched from the first party mode to the first light surface mode, and the human eye perceives the image display device 30 to display the brightness. Changes while improving display quality. In an embodiment, the image display device 3 can further include a second electrical controller 44a. The second controller 44a is coupled to the backlight module %. When the switching light diffusing component % accepts the first power, the second voltage controller provides a third power to enable the backlight module 34 to receive the third power. To present the first brightness mode, when the switching light diffusing element 38 receives the second voltage, the second voltage controller 44a provides a fourth voltage to cause the backlight module 44 to accept the fourth voltage to assume the first shell mode. . Preferably, the fourth voltage is greater than the third voltage. Figure UA and Figure 12; 8 is a schematic view of another embodiment of the present invention, illustrating the effect of using a light-impermeable block with reflective properties. When the light collimating 7L member is a light barrier substrate 56, the material of the optical barrier substrate is not limited. The material of the optical block 56b is not limited, and may be, for example, a metal material, a plastic material or an ink material. Referring to FIG. 12A and FIG. 12β, when the opaque block 56b of the substrate is formed of a material having a reflective property, such as a metal material, the large viewing angle ir ir that is blocked by the opaque block 56b can be reflected back. In the backlight module 34, light is emitted upward through the backlight module 34, thereby achieving an effect of improving light extraction efficiency. According to the design of the foregoing various embodiments of the present invention, the light-emitting control device is turned on and off by using the -switching type 赖 scatter element as the gaze relay, the surface is placed between the display panel and the light source providing the display panel. Two different states have a first mode and a second mode. In the first mode, the collimated or separated light can pass through without changing its original path, and the second mode can be scattered. Direct or separate light changes to make the first travel path' enable-image display device with planar two-dimensional (2D) / stereo three-dimensional (four) display mode switching function to provide different visual effects, and has a narrow viewing angle / wide viewing angle ❹ age mode city Wei Lai's information has different uses for publicity or privacy protection. According to the design of each of the foregoing embodiments of the present invention, the image display device is not limited to the inclusion-disparity optical component. The image display device can include an optical path changing component for changing the optical path of the light emitted by the backlight module to cooperate with the display panel to generate a first display mode. In the foregoing embodiments, the parallax light member or the light collimating component is only the optical path changing component, and the optical path changing component can be an optical path of the light emitted by the backlight module developed by the existing or future 15 201031969 to match the display panel. And a component that produces a display mode. Figure 13 is a diagram showing an image display device 30a according to another embodiment of the present invention. The embodiment of Fig. 13 is similar to the embodiment of Fig. 68, and therefore the same elements are denoted by the same reference numerals, and the description of the same parts will be omitted. Only the parts of the two embodiments will be described below. Referring to FIG. 13, the image display device 3A includes a display panel %, a backlight module 34, an optical path changing element 35, a photo sensor 45a, and a switching light diffusing element 38. In the present embodiment, the optical path changing element % is a light collimating 7L member 36', so that the image display is slightly switched between the wide viewing mode and the narrow viewing mode. In one embodiment, the optical path changing element 35 can also be a parallax optical component. The light sensor 45 is called on the light exiting side of the switching light diffusing element 38 for sensing a measured brightness of the light passing through the switching light diffusing element 38. In the present embodiment, the light sensing H45a is provided on the side facing the display panel 32_the light diffusing element 38 and is interposed between the display panel 32 and the switching light diffusing element. In another embodiment, 'light sensing||45& can be provided on the light exiting side of the display panel 32 (not shown). In addition, the light module 34 exhibits a different brightness mode depending on the measured brightness measured by the light sensor. More specifically, when the switching light diffusing element 38 is in the transparent mode, the display brightness of the shadow axis is reduced by %. Therefore, the measured brightness of the light sensor is also measured from a first level. Becomes - a second level below this first level. Backlighting 34 receives the measurement 16 201031969 After the brightness is known, the brightness of the measurement is reduced, and the brightness of the second brightness is greater than the brightness of the first brightness mode. The image display device 3 can further include a second voltage controller 44a. The second voltage controller 4 is connected to the backlight module to measure the light sensing lf45a, and the second voltage controller 44a receives the measured brightness according to the measurement. More specifically, when the measurement redundancy measured by the photo sensor 45a is the first level, the second voltage controller corrects and supplies the voltage to cause the backlight module 34 to accept the third voltage to present the first- The brightness mode; when the measured brightness measured by the photo sensor 45a is the second level, the second voltage controller 44a provides a fourth voltage to cause the backlight module 44 to accept the fourth electrical waste to present the second brightness mode I due to The second level is lower than the first level, and therefore preferably the fourth voltage is greater than the third voltage. The cause of the decrease in the display brightness of the positive direction of the image display device 30, for example, the aging of the backlight module 34. In the embodiment of _, the present embodiment 10 has a display brightness reduction caused by the aging of the domain 4 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The display shows a higher brightness, and the device 3G can display a relatively stable display with a higher display quality. Although the present invention has been described above, it is intended that the present invention may be modified and modified in a manner that does not depart from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached. In addition, the present invention may be used to achieve the advantages or features of the present invention. In addition, the abstract sections and headings are for the purpose of searching only, and are not intended to limit the scope of the invention. And the file [Simple description of the schema] - Xi =: display _ parallax light automatically produced one
-圖2A及圖2B為顯示依本發明一實施例之影像顯示裝置 不意圖’其中圖2八示意一平面二維(2〇)顯示模式且圖泷示 意一立體三維(3D)顯示模式。 圖3A及圖3B為本發明另一實施例之示意圖，說明視差 障壁基板採用具反射雖之不透光區塊所帶來的功效。 圖4及圖5為顯示不同視差光件實施例之示意圖。 圖6A及圖6B為顯示依本發明另一實施例之影像顯示裝 置不意圖’其中圖6A示意一廣視角顯示模式且圖6B示意一 窄視角顯示模式。 圖7至圖11為顯示不同光準直元件實施例之示意圖。 圖12A及圖12B為本發明另一實施例之示意圖，說明光 準直元件採用具反射特性之不透光區塊所帶來的功效。 圖13為顯示依本發明另一實施例之影像顯示裝置的示 意圖。 18 201031969 【主要元件符號說明】 10 影像顯示裝置 12 顯示面板 14 背光模組 16 視差光件 * 18 切換式光擴散元件 - 20 觀察者 e 22 視差障壁基板 22a 透光區塊 22b 不透光區塊 24 第一電壓控制器 24a 第二電壓控制器 26 聚焦透鏡組 26a 聚焦透鏡結構 28 柱狀透鏡組 28a 柱狀透鏡結構 - 30 影像顯示裝置 - 32 顯不面板 32 觀察者 34 背光模組 36 光準直元件 38 切換式光擴散元件 19 201031969- Figures 2A and 2B are diagrams showing an image display apparatus according to an embodiment of the present invention, which is not intended to have a planar two-dimensional (2D) display mode and a three-dimensional (3D) display mode. 3A and 3B are schematic views showing the effect of a parallax barrier substrate using an opaque block having reflection, according to another embodiment of the present invention. 4 and 5 are schematic views showing embodiments of different parallax optical components. 6A and 6B are diagrams showing an image display apparatus according to another embodiment of the present invention, wherein FIG. 6A illustrates a wide viewing angle display mode and FIG. 6B illustrates a narrow viewing angle display mode. 7 through 11 are schematic views showing embodiments of different light collimating elements. 12A and 12B are schematic views showing the effect of the light collimating element using an opaque block having a reflective property according to another embodiment of the present invention. Fig. 13 is a view showing an image display apparatus according to another embodiment of the present invention. 18 201031969 [Main component symbol description] 10 Image display device 12 Display panel 14 Backlight module 16 Parallax light device * 18 Switching light diffusing element - 20 Observer e 22 Parallax barrier substrate 22a Light transmitting block 22b Light-tight block 24 First voltage controller 24a Second voltage controller 26 Focusing lens group 26a Focusing lens structure 28 Cylindrical lens group 28a Cylindrical lens structure - 30 Image display device - 32 Display panel 32 Observer 34 Backlight module 36 Straight element 38 switching light diffusing element 19 201031969
44 第一電壓控制器 44a 第二電壓控制器 45a 光感測器 52 柱狀透鏡組 52a 柱狀透鏡結構 54 柱狀稜鏡組 54a 柱狀稜鏡結構 56 光障壁基板 56b 不透光區塊 100 影像顯示裝置 102 液晶面板 104 視差障壁基板 106、 108 玻璃基板 110 液晶層 I 入射光 IR 反射光 2044 first voltage controller 44a second voltage controller 45a light sensor 52 cylindrical lens group 52a cylindrical lens structure 54 columnar group 54a columnar structure 56 optical barrier substrate 56b opaque block 100 Image display device 102 liquid crystal panel 104 parallax barrier substrate 106, 108 glass substrate 110 liquid crystal layer I incident light IR reflected light 20