201111897 PT1580 308l2twf.doc/n 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種顯示裝置與鏡頭，且特別是有關 於一種投影裝置及多向投影鏡頭。 【先前技術】 隨著顯示技術的進步，投影裝置不再限制於傳統刻板 印象中置於桌上或天花板上的大型裝置，而已經可以是適 於放入口袋中的微型可攜式裝置。此外，微型投影系統可 結合至手機、相機或個人數位助理等可攜式裝置中，以增 加使用的便利性。 隨著人們對晝面解析度的要求越來越高，投影裝置中 的光閥越來越大，而隨著對晝質的要求越來越高，亦使得 對微型投影裝置的可變焦性與大光圈之需求日益增加。然 而，如此高的規格需求會直接地造成投影鏡頭的尺寸與體 積之增加。因此’從各元件的配置方式之設計來縮小投影 裝置的整體體積。 美國專利第7075727號與本國公告專利第];282439號 各提出一 L型鏡頭，L型鏡頭的元件配置方式有別於傳統 直線型鏡頭的元件配置方式，其藉由一摺鏡（folding mirror)來改變光的行進路徑。然而，這樣的鏡頭並無法 達到多重顯像的功能，以增加使用的便利性。 【發明内容】 201111897 PT1580 30812twf.doc/n 中得本至^月的丰其他目的和優點可以從本發曰月所揭露的技術特徵 T得到進一步的了解。201111897 PT1580 308l2twf.doc/n VI. Description of the Invention: TECHNICAL FIELD The present invention relates to a display device and a lens, and more particularly to a projection device and a multi-directional projection lens. [Prior Art] With the advancement of display technology, the projection device is no longer limited to a large device placed on a table or a ceiling in a conventional stereotype, but may already be a micro-portable device suitable for being placed in a pocket. In addition, the miniature projection system can be incorporated into portable devices such as cell phones, cameras or personal digital assistants to increase ease of use. As people's requirements for the resolution of the kneading surface become higher and higher, the light valve in the projection device is getting larger and larger, and as the requirements for the enamel are getting higher and higher, the zoomability of the micro-projection device is also The demand for large apertures is increasing. However, such high specification requirements directly contribute to the increase in the size and volume of the projection lens. Therefore, the overall volume of the projection device is reduced from the design of the arrangement of the components. U.S. Patent No. 7,075,727 and National Patent No. 282,439 each propose an L-type lens, and the L-type lens has a component arrangement different from that of a conventional linear lens, which is formed by a folding mirror. To change the path of travel of light. However, such a lens does not achieve the function of multiple developments to increase the convenience of use. SUMMARY OF THE INVENTION 201111897 PT1580 30812twf.doc/n The other purposes and advantages of this book can be further understood from the technical features disclosed in this issue.
為達上述之一或部份或全部目的或是其他目的，本發 明提供一種投影裝置具有多重顯像功能。 XTo achieve one or a portion or all of the above or other objects, the present invention provides a projection apparatus having multiple development functions. X
本發明提供-種多向投影鏡頭，可將影像光束投射於 夕個方向上。本發明之一實施例提出—種投影裝置，包括 一光閥及一多向投影鏡頭。光閥適於產生—影像光束。多 向投影鏡頭配置於影像光束的傳遞路徑上，並包括一後透 鏡群、一可勤式反射元件、一第一前透鏡群及一第二前透 鏡群。後透鏡群配置於影像光束的傳遞路徑上。可動式反 ，元件適於切入或切離來自後透鏡群的影像光束的傳遞路 從。當可動式反射元件切入影像光束的傳遞路徑時，可動 式反射元件將來自後透鏡群的影像光束反射至第一前透鏡 群’且影像光束穿透第一前透鏡群而沿著一第一方向傳遞 至外界。當可動式反射元件切離影像光束的傳遞路徑時， 來自後透鏡群的影像光束穿透第二前透鏡群而沿著一第二 方向傳遞至外界，且第一方向不同於第二方向。 在本發明之一實施例中，多向投影鏡頭更包括一第一 支轴’其中可動式反射元件樞接至第一支軸，並適於以第 一支轴為轴擺動’使得可動式反射元件切入或切離影像光 束的傳遞路徑。多向投影鏡頭更包括一致動器，致動器連 接至可動式反射元件，以驅使可動式反射元件擺動。第一 前透鏡群的光軸可實質上垂直於第二前透鏡群的光軸。 201111897 PT1580 30812twf.doc/n e在本發明f—實補中，可動式反射元件具有相對之 -第-端與-第二端，並適於在_第—位置、―第二位置 及一第Γ位置之間切換。多向投影鏡頭更包括一第—支 軸、一第一支軸及一第三前透鏡群。當可動式反射元件切 換至第-位置時’可動式反射科的第—端與第一支軸樞 接’且可動式反射元件將影像光束反射至第_前透鏡群。 當可動式反射元件婦至第二位置時，可動式反射元件的 第-端與第-支軸樞接，可動式反射元件的第二端與第二 支軸樞接。此時，可動式反射元件切離影像光束的傳遞路 徑，而影像光束穿透第二前透鏡群而傳遞至外界。當可動 式^射7G件切換至第三位置時，可動式反射元件的第二端 與第-支軸枢接，並以該第二支軸為軸擺動，以將影像光 束反射至第二前透鏡群，而影像光束穿透第三前透鏡群而 沿著-第三方向傳遞至外界。第三方向不同於第—方向及 第二方向。 〇在本發明之一實施例中，多向投影鏡頭更包括一致動 器’致動ϋ連接至可動纽射元件，尋使可動式反射元 件在第-位置、第二位置及第三位置之間切換。第一前透 鏡群的光，與第三前透鏡群的光轴實質上落在同一直線 上’第二前透鏡群的光軸實f上垂直於第—前透鏡群的光 軸’且可動式反射元件配置於第—前透鏡群與第三前透鏡 群之間。後透鏡群可包括一凸透鏡，凸透鏡配置於後透鏡 群之郝近可動式反射元件的—端。第—前透鏡群可包括一 凹透鏡’凹透鏡配置於第一前透鏡群之遠離可動式反射元 201111897 PT1580 30812twf.doc/n 件的一端。第二前透鏡群可包括另一凹透鏡，凹透鏡配置 於第二前透鏡群之遠離可動式反射元件的一端。 本發明之另一實施例提出一種投影裝置，包括一光閥 及-多向投影鏡頭。光㈣於產生―影像光束。多向投影 鏡頭配置於影像光束的傳遞路徑上，並包括—後透鏡群、 第中性费度濾光單元、一第一前透鏡群及一第二前透 鏡群。後透鏡群配置於影像光束的傳遞路徑上。第一中性The present invention provides a multi-directional projection lens that projects an image beam in a temporal direction. One embodiment of the present invention provides a projection apparatus including a light valve and a multi-directional projection lens. The light valve is adapted to produce an image beam. The multi-directional projection lens is disposed on the transmission path of the image beam, and includes a rear lens group, a movable reflection element, a first front lens group and a second front lens group. The rear lens group is disposed on the transmission path of the image beam. The movable element is adapted to cut in or out from the transmission path of the image beam from the rear lens group. When the movable reflective element cuts into the transmission path of the image beam, the movable reflective element reflects the image beam from the rear lens group to the first front lens group' and the image beam penetrates the first front lens group along a first direction Passed to the outside world. When the movable reflective element cuts away from the transmission path of the image beam, the image beam from the rear lens group penetrates the second front lens group and is transmitted to the outside in a second direction, and the first direction is different from the second direction. In an embodiment of the invention, the multi-directional projection lens further includes a first support shaft 'where the movable reflective element is pivotally connected to the first support shaft and is adapted to swing with the first support shaft as an axis to enable movable reflection The component cuts or cuts off the transmission path of the image beam. The multi-directional projection lens further includes an actuator coupled to the movable reflective member to urge the movable reflective member to oscillate. The optical axis of the first front lens group may be substantially perpendicular to the optical axis of the second front lens group. 201111897 PT1580 30812twf.doc/ne In the f-complement of the present invention, the movable reflective element has a relative - first end and a second end, and is adapted to be at the _th position, the second position, and a third Switch between locations. The multi-directional projection lens further includes a first support shaft, a first support shaft and a third front lens group. When the movable reflecting element is switched to the first position, the first end of the movable reflecting section is pivoted with the first supporting shaft and the movable reflecting element reflects the image beam to the first front lens group. When the movable reflective element is in the second position, the first end of the movable reflective element is pivotally coupled to the first support shaft, and the second end of the movable reflective element is pivotally coupled to the second support shaft. At this time, the movable reflecting element cuts off the transmission path of the image beam, and the image beam passes through the second front lens group and is transmitted to the outside. When the movable 7G member is switched to the third position, the second end of the movable reflective member is pivotally connected to the first support shaft, and is pivoted about the second support shaft to reflect the image beam to the second front The lens group passes through the third front lens group and is transmitted to the outside in the third direction. The third direction is different from the first direction and the second direction. In one embodiment of the invention, the multi-directional projection lens further includes an actuator 'actuating ϋ coupled to the movable ejector element, locating the movable reflective element between the first position, the second position, and the third position Switch. The light of the first front lens group substantially falls on the same line as the optical axis of the third front lens group. The optical axis of the second front lens group is perpendicular to the optical axis of the first front lens group and is movable. The reflective element is disposed between the first front lens group and the third front lens group. The rear lens group may include a convex lens disposed at the end of the near-moving reflective element of the rear lens group. The first front lens group may include a concave lens. The concave lens is disposed at one end of the first front lens group away from the movable reflection element 201111897 PT1580 30812twf.doc/n. The second front lens group may include another concave lens disposed at an end of the second front lens group remote from the movable reflective element. Another embodiment of the present invention provides a projection apparatus including a light valve and a multi-directional projection lens. Light (4) produces an "image beam." The multi-directional projection lens is disposed on the transmission path of the image beam, and includes a rear lens group, a neutral density filter unit, a first front lens group and a second front lens group. The rear lens group is disposed on the transmission path of the image beam. First neutral
密度濾'光單元配置於來自後透麟的影像光束的傳遞路徑 上1其中縣光束的—第—部分絲會被第—巾性密度渡 光單兀反射，且影像光束的一第二部分光束會穿透第一中 性密度遽光單元。第-前透鏡群於來自第—中性密度 濾光單元的第一部分光束的傳遞路徑上，其中第一部分光 束會穿透第-前透鏡群而沿著—第—方向傳遞至外界:第 二前透鏡群配置於來自第—巾性密度濾光單元的第二部分 光束之傳祕徑上，其巾第二部分光束會穿透第二前透鏡 群而沿著-第二方向傳遞至外界。第—方向不同於第二方 向。 在本發明之-實施例中，第一中性密度遽光單元為一 半穿透半反料元。第-巾性密賴料元例如為一中性 密度濾、舰。在本發明之-實施财，S向郷鏡頭更包 括二稜鏡’彼此互相承靠’其中$—巾性密輯光單元位 於此二棱鏡的交界面，且為一中性密度濾光膜。 在本發明之-實施例中，多向投影_更包括 中性密度滤光單元及-第三前透鏡群。第二中性密度渡光 201111897 PT1580 30812twf.doc/n 單元配置於來自後透鏡群的影像光束的傳遞路徑上，且該 第一甲性密度濾光單元與該第二中性密度濾光單元為交叉 配置。第二部分光束會穿透第二中性密度濾光單元而傳遞 至弟一剷透鏡群，且影像光束的一第三部分光束會被第二 中性德度滤光單元反射。第三前透鏡群配置於來自第二中 性雄、度遽光單元的第三部分光束的傳遞路徑上。 在本發明之一實施例中，第二中性密度歲 半穿透半反料H中性密錢絲元與t =密 度濾光單元例如各為一中性密度濾光鏡。在本發明之一實 施例中，多向投影鏡頭更包括一第一稜鏡、一第二稜鏡二 一第三稜鏡及一第四稜鏡。第二稜鏡承靠第一稜鏡。第三 稜鏡承靠第二稜鏡。第四稜鏡承靠第三稜鏡與第一棱鏡。 部分第-中性密度濾 '光單元位於第—稜鏡與第二稜鏡的交 ，面，且另-部分第-中性密度濾、光單元位於第三棱鏡與 第四稜鏡較界面。部分第二巾性密錢光單元位於第一 稜鏡與第四棱鏡的交界面，且另—部分第二中性即豫光 單元位於第二稜鏡與第三稜鏡的交界面。第一中= 光單元與第二巾_度縣單元例如各為^ ^第-中性密錢、料元與第二中性密度濾光單元㈣ 於第一前透鏡群與第三前透鏡群之間。 凸 在本發明之-實施例中’後透鏡群包括一凸透鏡 透鏡配置於錢鏡群讀㈣—幢密錢料元的一 Hwit鏡群可包括-凹透鏡’凹透鏡配置於第一 201111897 PT1580 30812twf.doc/n 透鏡群之遠離第一中性密度濾光單元的一端。& 群可包括另-凹透鏡，凹透鏡配置於第二前:爾透鏡 第一中性密度濾光單元的一端。 逯鏡蛘之遠離 本發明之X-實麵郷 投射-光騎產生的1 彡像光束。多向投影鏡ς = 後透鏡群、上述可動式反射元件、上述第 述第二前透鏡群。 透鏡群及上 本發明之再-實施例提出一種多向投影鏡頭， 投射-:¾騎產生的—影像光束。多向投影鏡=过 後透鏡群、上述第—中性密度濾光單元、 2 群及上述第4魏群。 Μ Μ透鏡 由於本發明之實施例之多向投影鏡頭採用可反 f70件來切換影像光束的傳遞方向，或採用中性密度滅光 ，來將影像光束分成多道’因此本發明之實施二G向 ，影鏡頭可將影像光束投射於多個方向上，進而使採用此 夕向投影鏡頭的投影裝置能夠達到多重顯像的功能。 杏為讓本發明之上述特徵和優點能更明顯易僅，下文特 舉實施例，並配合所附圖式作詳細說明如下。 【實施方式】 下列各實施例的說明是參考附加的圖式，用以例示本 I月ΊΓ用以貫施之特定實施例。本發明所提到的方向用 語，例如「上」、「下」、「前」、「後」、「左」、.「右」 等，僅疋參考附加圖式的方向。因此，使用的方向用語是 201111897 PT1580 30812twf.doc/n 用來說明，而非用來限制本發明。 圖1A為本發明之一實施例之投影裝置當其可動式反 射元件切入影像光束的傳遞路徑時之結構示意圖，而圖汨 為圖1A之投影裝置當其可動式反射元件切離影像光束的 傳遞路徑時之結構示意圖。請參考圖1A及圖1B，本實施 例之投影裝置100包括一光閥110及一多向投影鏡^ 200。光閥11〇適於產生一影像光束112。具體而言，投影 裝置100可包括一照明系統12〇適於提供一照明光束 122。在本實施例中，光閥11〇例如為一矽基液晶面板 (liquid-cryStal-on-silicon panel，LC〇s panel )，而照明光 束122會被一偏振分光元件130反射至光閥ho。光閥11〇 會將照明光束122反射並轉換為影像光束112。由於影像 光束112的偏振方向與照明光束122的不同，因此影像光 束112會牙透偏振分光元件130。然而，本發明之光閥no 並不以矽基液晶面板為限，在其他實施例中，光閥11〇亦 可採用數位微鏡元件（digitai micr〇_mirr〇r device，dmd )， 而偏振分光元件130亦置換為適用於數位微鏡元件的光學 元件諸如内部全反射稜鏡（t〇tal internal reRecti〇n prism， TIR prism)、％鏡（fieid iens)或摺鏡（folding mirror) 等’如圖1C所示’光閥110為數位微鏡元件，適於投射 一影像光束112 ’影像光束112通過内部全反射稜鏡傳遞 至多向投影鏡頭200。 再次茶考圖1A及圖1B，多向投影鏡頭200配置於影 像光束112的傳遞路徑上，並包括一後透鏡群21〇、一可 201111897 PT1580 30812twf.doc/n 動式反射元件220、一第一前透鏡群23〇及一第二前透鏡 群240。後透鏡群210配置於影像光束112的傳遞路徑上。 可動式反射元件220適於切入或切離來自後透鏡群21〇的 影像光束112的傳遞路徑，且例如為一反射鏡。在本實施 例中，多向投影鏡頭200更包括一第一支軸25〇，而可動 式反射元件220樞接至第一支軸25〇，並適於以第一支軸 250為轴擺動，而切入或切離影像光束112的傳遞路徑。 • 在本實施例_，第一支軸250配置於第一前透鏡群23()的 光轴A1之一側，且配置於第二前透鏡群24〇的光軸A2 之一側。光軸A1可實質上垂直於光轴A2。此外，在本實 施例中，多向投影鏡頭2〇〇可更包括一致動器26〇，其連 接至可動式反射元件22〇 ,以驅使可動式反射元件22〇擺 動。 當可動式反射元件220切入影像光束112的傳遞路徑 時，如圖1A所示，會將來自後透鏡群21〇的影像光束ιΐ2 反射至弟一4透鏡群230，且影像光束112會穿透第—前 透鏡群230而沿著一第一方向D1傳遞至外界。當可動式 反射元件220切離影像光束112的傳遞路徑時，如圖 所不，來自後透鏡群21〇的影像光束112會穿透第二前 鏡群240而沿著一第二方向Μ傳遞至外界。第—方向以 不同於第二方向E>2。如此一來，多向投影鏡頭2〇〇便能夠 將衫像光束112投影在兩個方向上，並在兩個不同的位置 形成影像晝面，而使本實施例之投影裝置1〇〇能夠達到雙 重顯像的功能。如此一來，投影裝置1〇〇的擺放位置與= 201111897 PT1580 30812twf.doc/n 向便能夠有較多的選擇，此有利於增加投影裝置1〇〇 同環境的適用性。 + 在本實施例中，第一前透鏡群230與第二前透鏡群24〇 的屈光度例如為負’而後透鏡群210的屈光度例如為正， 但本發明並不以此為限。此外，在本實施例中，後透鏡群 210可包括一凸透鏡212配置於後透鏡群210之鄰近可動 式反射元件220的一端，以使影像光束112能夠以接*** 行光的方式入射可動式反射元件220，這可提升反射效率 與均勻性。第一前透鏡群230可包括一凹透鏡232配置於 第一前透鏡群230之遠離可動式反射元件22〇的一端。第 二前透鏡群240可包括一凹透鏡242配置於第二前透鏡群 240之遠離可動式反射元件220的一端。凹透鏡232或凹 透鏡242能使影像光束112發散，以在一屏幕（未繪示） 上形成車父大尺寸的影像晝面。 圖2A、圖2B及圖2C分別繪示本發明之另一實施例 之投影裝置當可動式反射元件切換至第一位置、第二位置 及第二位置時的結構示意圖。請參照圖2a至圖2C，本實 施例之投影裝置l〇〇a與上述投影裝置1〇〇 (如圖1A及圖 1B所繪示）類似，而兩者的差異如下所述。在本實施例中， 可動式反射元件220具有相對之一第一端222與一第二端 224，並適於在一第一位置ρι (如圖2A所示）、一第二 位置P2 (如圖2B所示）及—第三位置p3 (如圖2C所示） 之間切換。多向投影鏡頭2〇〇a更包括一第—支柏250、一 第二支軸280及一第三前透鏡群29〇。在本實施例中，第 12 201111897 PT1580 30812twf.d〇c/n 支軸25〇與第二支轴細分別位於第三前透鏡群观的 光，A3之相對_，且第一支軸25〇與第二支軸位 於弟二Μ透鏡群240的光軸A2之同一側^此外，在本實 施例中，絲A1與光軸A3實f上落在同—直線上，光轴 A2實質上垂直於光軸A1，且可動式反射元件22q配置於 第一前透鏡群230與第三前透鏡群29〇之間。當可動式反 射元件220切換至第一位置ρι日夺，可動式反射元件22〇 的第-端222會與第-支軸25〇樞接，且可動式反射元件 220會將影像光束112反射至第一前透鏡群23〇。當可動式 反，凡件220切換至第二位置p2時，可動式反射元件22〇 的第一端222會與第一支軸250樞接，且可動式反射元件 220的第二端224會與第二支軸28〇樞接。此時，可動式 反射元件220會切離影像光束112的傳遞路徑，而影像光 束112會穿透第二前透鏡群24〇而傳遞至外界。當可動式 反射元件220切換至第三位置p3時，可動式反射元件22〇 的第二端224會與第二支軸280樞接，並以該第二支軸28〇 為轴擺動，以將影像光束112反射至第三前透鏡群290， 而影像光束112會穿透第三前透鏡群29〇而沿著一第三方 向D3傳遞至外界。第三方向D3不同於第一方向D1及第 =方向D2。如此一來，多向投影鏡頭2〇〇a便能夠將影像 光束112投射至二個不同的方向，以使本實施例之投影裝 置100a達到三重顯像的功能。 在本實施例中，多向投影鏡頭200a的致動器260可 驅使可動式反射元件220在第一位置P1、第二位置p2及 13 201111897 PT1580 30812twf.doc/n 第一位ίΡ3之間切換。此外，多向投影鏡頭2GGa更包括 一，制單元獅，其·連接至致動器260、第-支軸250 及第-，軸28G。當可動式反射元件22()欲切換至第一位 置PI B寸，控制單元3〇〇可下達指令，以使第一支轴25〇 將可動式反射元件220的第一端222鎖住，但仍使可動式 反射元件220能夠以第一支轴250為轴樞轉。此時，控制 單兀300可下達另一指令，以使致動器26〇驅使可動式反 射元# 220樞轉至第一位置p〗。當可動式反射元件22〇欲 切換至弟一位置P2時，控制單元300可下達指令，以使 第一支軸250與第二支軸280分別將可動式反射元件22〇 的第一端222與第二端224鎖住。當可動式反射元件22〇 欲切換至第三位置P3時，控制單元300可下達指令，以 使第二支軸280將可動式反射元件220的第二端224鎖 住’但仍使可動式反射元件220能夠以第二支轴28〇為軸 樞轉。此時，控制單元300可下達另一指令，以使致動器 260驅使可動式反射元件220樞轉至第三位置P3。 此外’使第一支軸250鎖住第一端222或使第二支軸 280鎖住第二端224可採用所屬領域中具有通常知識者所 熟知的方法，例如採用機構的卡合、磁力的吸引、靜電力 的吸引或其他適當的方法。 圖3為本發明之又一實施例之投影裝置的結構示意 圖。本實施例之投影裝置10(^與上述投影裝置100 (如圖 1A及圖1B所繪示）類似’而兩者的差異主要在於本實施 例之投影裝置l〇〇b之多向投影鏡頭200b是採用一第一中 201111897 30812twf.doc/n 性密度濾光單元400來取代投影裝置10〇中的可動式反射 元件220。具體而言，第一中性密度濾光單元4〇〇配置於 來自後透鏡群210的影像光束112的傳遞路徑上，其中影 像光束112的一第一部分光束H2a會被第—中性密度濾光 單元400反射，且影像光束112的一第二部分光束 會牙透第一中性也、度慮光單元400。第一前透鏡群mo配 置於來自第一中性密度濾光單元400的第—部分光束n2a 的傳遞路徑上’其中第一部分光束112a會穿透第一前透鏡 群230而沿著第一方向D1傳遞至外界。第二前透鏡群24〇 配置於來自第一中性密度濾光單元400的第二部分光束 112b之傳遞路徑上，其中第二部分光束112b會穿透第二 前透鏡群240而沿著第二方向D2傳遞至外界。第一方向 ΓΜ不同於第二方向D2。如此一來，投影鏡頭2〇0b便能將 影像光束112 —分為二，以將影像光束112投影至兩個不 同的方向上，進而使本實施例之投影裝置l〇0b達到雙重顯 像。 在本實施例中，第一中性密度瀘光單元4〇〇例如為一 半穿透半反射單元，.但本發明並不以此為限。在本實施例 中’多向投影鏡頭200b更包括二稜鏡410a、410b，其彼 此互相承靠，其中第一中性密度濾光單元400位於此二稜 鏡410a、410b的交界面，且為一中性密度濾光膜。 然而’在其他實施例中，多向投影鏡頭2〇〇b亦可不 採用稜鏡410a、410b ’而第一中性密度濾光單元4〇〇為一 中性密度濾光鏡。 15 201111897 ΡΤ158ϋ 30812twf.doc/n 圖4為本發明之再一實施例之投影裝置的結構示意 圖。本實施例之投影裝置100c與上述投影裝置100b (如 圖3所繪示）類似’而兩者的差異如下所述。在本實施例 之投影裝置100c中，多向投影鏡頭200c更包括一第二中 性德度;慮光單元500及一第三前透鏡群290。第二中性密 度濾光單元500配置於來自後透鏡群21〇的影像光束的傳 遞路控上’在本實施例_，第一中性密度濾光單元400與 第二中性密度濾光單元5〇〇可為交叉配置。第二部分光束 112b會穿透第二中性密度濾光單元5〇〇而傳遞至第二前透 鏡群240 ’且影像光束112的一第三部分光束U2c會被第 二中性密度濾光單元5〇〇反射。第三前透鏡群29〇配置於 來自，二中性密度濾光單元500的第三部分光束丨丨及的傳 遞路徑上，且第一中性密度濾光單元400與第二中性密度 :盧⑽光單,500配置於第一前透鏡群23〇與第三前透鏡君; ^之而第三部分光束⑽會穿透第三前透鏡群㈣ 者第二方向D3傳遞至外界。第三方向D3不同於第一 及第二方向D2°如此-來’投影鏡頭2G〇e便能 夸衫像光束112-分為三，以將影像光束112投影至 的方向上，進而使本實關之投料置魏達到:重 為之—實施财，第二中,_度渡光單元500 Β、日透+反射單元’但本發明並不以此為限。在太膝 月之一貫施例中，多向投影鏡頭1〇〇c x 一第二稜鏡稱b、一第三稜鏡心4 :;鏡 久弟四稜鏡 201111897 PT1580 30812twf.doc/nThe density filter 'light unit is disposed on the transmission path of the image beam from the rear tunnel 1 wherein the first portion of the county beam is reflected by the first-density density light-emitting unit, and a second partial beam of the image beam Will penetrate the first neutral density calender unit. The first-front lens group is on a transmission path of the first partial beam from the first-neutral density filter unit, wherein the first partial beam passes through the first-front lens group and is transmitted to the outside in the first direction: the second front The lens group is disposed on the secret path of the second partial beam from the ninth density filter unit, and the second portion of the beam passes through the second front lens group and is transmitted to the outside in the second direction. The first direction is different from the second direction. In an embodiment of the invention, the first neutral density calender unit is a semi-transparent half-reverse element. The first-clothing dense material element is, for example, a neutral density filter, a ship. In the practice of the present invention, the S-direction lens further includes two 稜鏡's mutually abutting each other' wherein the $-skin-density light unit is located at the interface of the two prisms and is a neutral density filter film. In an embodiment of the invention, the multi-directional projection further comprises a neutral density filter unit and a third front lens group. The second neutral density crossing light 201111897 PT1580 30812twf.doc/n unit is disposed on the transmission path of the image beam from the rear lens group, and the first alpha density filter unit and the second neutral density filter unit are Cross configuration. The second portion of the beam passes through the second neutral density filter unit and is transmitted to the shovel lens group, and a third portion of the image beam is reflected by the second neutrality filter unit. The third front lens group is disposed on a transmission path of the third partial light beam from the second neutral male and the grading unit. In one embodiment of the invention, the second neutral density eccentric hemispherical H-neutral dense filament element and the t = density filter unit are each a neutral density filter, for example. In one embodiment of the present invention, the multi-directional projection lens further includes a first side, a second side, a third side, and a fourth side. The second is to rely on the first one. The third is to rely on the second. The fourth one bears the third and the first prism. Part of the neutrophil filter 'light unit is located at the intersection of the first 稜鏡 and the second 稜鏡, and the other part of the neutrophil filter, the light unit is located at the interface between the third prism and the fourth 。. A portion of the second denim light unit is located at the interface of the first and fourth prisms, and another portion of the second neutral, that is, the unit of light, is located at the interface of the second and third turns. The first middle = light unit and the second towel _ degree unit are, for example, ^ ^ first-neutral dense money, the element and the second neutral density filter unit (4) in the first front lens group and the third front lens group between. In the embodiment of the present invention, the 'rear lens group includes a convex lens lens disposed in the pocket group reading (4) - a Hwit lens group of the dense money element may include a - concave lens 'concave lens disposed on the first 201111897 PT1580 30812twf.doc /n The lens group is away from one end of the first neutral density filter unit. The & group may include a double-concave lens disposed at one end of the second front-end lens first neutral density filter unit. The 逯 mirror is far away from the X-real surface of the present invention 投射 Projection - 1 彡 beam generated by light riding. The multi-directional projection mirror ς = the rear lens group, the movable reflection element, and the second front lens group. Lens Group and Above A further embodiment of the present invention provides a multi-directional projection lens that projects a - image beam produced by a ride. Multi-directional projection mirror = post-lens group, the above-mentioned first-neutral density filter unit, 2 groups, and the above-mentioned 4th Wei group. The multi-directional projection lens of the embodiment of the present invention uses an anti-f70 device to switch the transmission direction of the image beam, or uses a neutral density to extinguish the image beam into multiple channels. Therefore, the implementation of the present invention is two The projection lens can project the image beam in a plurality of directions, thereby enabling the projection device using the illuminating projection lens to achieve multiple development functions. The above features and advantages of the present invention are more apparent from the above, and the following specific embodiments are described in detail below with reference to the accompanying drawings. [Embodiment] The following description of the embodiments is provided to illustrate the specific embodiments of the present invention. The directions used in the present invention, such as "upper", "lower", "front", "back", "left", "right", etc., refer only to the direction of the additional drawing. Therefore, the directional term used is 201111897 PT1580 30812twf.doc/n for illustration, and not for limiting the invention. FIG. 1A is a schematic structural view of a projection apparatus according to an embodiment of the present invention when a movable reflection element is cut into a transmission path of an image beam, and FIG. 1A is a projection apparatus of FIG. 1A when a movable reflection element is cut away from an image beam. Schematic diagram of the path. Referring to FIG. 1A and FIG. 1B, the projection apparatus 100 of the present embodiment includes a light valve 110 and a multi-directional projection mirror 200. The light valve 11 is adapted to generate an image beam 112. In particular, projection apparatus 100 can include an illumination system 12 that is adapted to provide an illumination beam 122. In the present embodiment, the light valve 11 is, for example, a liquid-cryStal-on-silicon panel (LC〇s panel), and the illumination beam 122 is reflected by a polarization beam splitting element 130 to the light valve ho. The light valve 11 反射 reflects and converts the illumination beam 122 into an image beam 112. Since the polarization direction of the image beam 112 is different from that of the illumination beam 122, the image beam 112 will be permeable to the polarization beam splitting element 130. However, the light valve no of the present invention is not limited to the 矽-based liquid crystal panel. In other embodiments, the light valve 11 〇 can also be a digital micro mirror element (digitai micr〇_mirr〇r device, dmd), and the polarization The light splitting element 130 is also replaced with an optical element suitable for a digital micromirror element such as a t全tal internal reRecti〇n prism (TIR prism), a % mirror (fieid iens) or a folding mirror. As shown in FIG. 1C, the light valve 110 is a digital micromirror element suitable for projecting an image beam 112. The image beam 112 is transmitted to the multi-directional projection lens 200 through internal total reflection. 1A and 1B, the multi-directional projection lens 200 is disposed on the transmission path of the image beam 112, and includes a rear lens group 21〇, a 201111897 PT1580 30812twf.doc/n moving reflection element 220, a first A front lens group 23A and a second front lens group 240. The rear lens group 210 is disposed on the transmission path of the image beam 112. The movable reflecting element 220 is adapted to cut into or cut away from the transmission path of the image beam 112 from the rear lens group 21, and is, for example, a mirror. In the embodiment, the multi-directional projection lens 200 further includes a first support shaft 25 , and the movable reflective element 220 is pivotally connected to the first support shaft 25 〇 and is adapted to swing with the first support shaft 250 as an axis. The path of the image beam 112 is cut or cut. In the present embodiment, the first support shaft 250 is disposed on one side of the optical axis A1 of the first front lens group 23 () and disposed on one side of the optical axis A2 of the second front lens group 24A. The optical axis A1 may be substantially perpendicular to the optical axis A2. Further, in the present embodiment, the multi-directional projection lens 2 can further include an actuator 26A connected to the movable reflection member 22A to urge the movable reflection member 22 to swing. When the movable reflective element 220 cuts into the transmission path of the image beam 112, as shown in FIG. 1A, the image beam ιΐ2 from the rear lens group 21〇 is reflected to the D4 lens group 230, and the image beam 112 penetrates. The front lens group 230 is transmitted to the outside along a first direction D1. When the movable reflective element 220 cuts off the transmission path of the image beam 112, as shown, the image beam 112 from the rear lens group 21〇 passes through the second front lens group 240 and is transmitted along a second direction to external. The first direction is different from the second direction E>2. In this way, the multi-directional projection lens 2 can project the shirt image beam 112 in two directions and form an image plane at two different positions, so that the projection apparatus of the embodiment can reach Dual imaging capabilities. In this way, the placement position of the projection device 1〇〇 and the =201111897 PT1580 30812twf.doc/n can be more selective, which is advantageous for increasing the applicability of the projection device 1 in the same environment. In the present embodiment, the refracting power of the first front lens group 230 and the second front lens group 24 例如 is, for example, negative ′ and the refracting power of the rear lens group 210 is, for example, positive, but the invention is not limited thereto. In addition, in the embodiment, the rear lens group 210 may include a convex lens 212 disposed at one end of the rear lens group 210 adjacent to the movable reflective element 220 to enable the image light beam 112 to enter the movable reflective element in a manner of approaching parallel light. 220, which improves reflection efficiency and uniformity. The first front lens group 230 may include a concave lens 232 disposed at one end of the first front lens group 230 away from the movable reflective member 22A. The second front lens group 240 may include a concave lens 242 disposed at one end of the second front lens group 240 away from the movable reflective element 220. The concave lens 232 or the concave lens 242 allows the image beam 112 to diverge to form a large image of the image on a screen (not shown). 2A, 2B, and 2C are schematic diagrams showing the structure of a projection apparatus according to another embodiment of the present invention when the movable reflective element is switched to the first position, the second position, and the second position. Referring to Figures 2a to 2C, the projection device 10a of the present embodiment is similar to the above-described projection device 1 (shown in Figures 1A and 1B), and the differences between the two are as follows. In this embodiment, the movable reflective element 220 has a first end 222 and a second end 224, and is adapted to be in a first position ρ (as shown in FIG. 2A) and a second position P2 (eg, Switched between Figure 2B) and - third position p3 (shown in Figure 2C). The multi-directional projection lens 2A further includes a first - branching wave 250, a second supporting shaft 280 and a third front lens group 29A. In this embodiment, the 12th 201111897 PT1580 30812twf.d〇c/n fulcrum 25 〇 and the second fulcrum are respectively located in the light of the third front lens group, the relative _ of A3, and the first fulcrum 25 〇 The second axis is located on the same side of the optical axis A2 of the second lens group 240. Further, in the present embodiment, the wire A1 and the optical axis A3 fall on the same line, and the optical axis A2 is substantially vertical. The optical axis A1 and the movable reflective element 22q are disposed between the first front lens group 230 and the third front lens group 29A. When the movable reflective element 220 is switched to the first position, the first end 222 of the movable reflective element 22 is pivotally coupled to the first support 25 , and the movable reflective element 220 reflects the image beam 112 to The first front lens group 23 is. When the movable member 220 is switched to the second position p2, the first end 222 of the movable reflective member 22 is pivotally connected to the first pivot 250, and the second end 224 of the movable reflective member 220 is coupled. The second shaft 28 is pivotally connected. At this time, the movable reflecting element 220 cuts off the transmission path of the image beam 112, and the image beam 112 penetrates the second front lens group 24〇 and is transmitted to the outside. When the movable reflective element 220 is switched to the third position p3, the second end 224 of the movable reflective element 22 is pivotally coupled to the second support shaft 280 and pivoted about the second support shaft 28〇 to The image beam 112 is reflected to the third front lens group 290, and the image beam 112 passes through the third front lens group 29 and is transmitted to the outside along a third direction D3. The third direction D3 is different from the first direction D1 and the == direction D2. In this way, the multi-directional projection lens 2a can project the image beam 112 into two different directions, so that the projection device 100a of the embodiment can achieve the function of triple-exposure. In the present embodiment, the actuator 260 of the multi-directional projection lens 200a can drive the movable reflective element 220 to switch between the first position P1, the second position p2, and the first position Ρ3, 13201111897 PT1580 30812twf.doc/n. Further, the multi-directional projection lens 2GGa further includes a unit lion which is coupled to the actuator 260, the first-support shaft 250, and the first-axis 28G. When the movable reflective element 22() is to be switched to the first position PI B, the control unit 3 can issue an instruction to cause the first support shaft 25 to lock the first end 222 of the movable reflective element 220, but The movable reflective element 220 is still pivotable about the first pivot 250. At this point, the control unit 300 can issue another command to cause the actuator 26 to urge the movable reflector element #220 to pivot to the first position p. When the movable reflective element 22 is to be switched to the second position P2, the control unit 300 can issue an instruction such that the first support shaft 250 and the second support shaft 280 respectively respectively connect the first end 222 of the movable reflective element 22 The second end 224 is locked. When the movable reflective element 22 is to be switched to the third position P3, the control unit 300 can give an instruction to cause the second support shaft 280 to lock the second end 224 of the movable reflective element 220 'but still make movable reflection Element 220 is pivotable with the second support shaft 28〇 as an axis. At this time, the control unit 300 can issue another command to cause the actuator 260 to urge the movable reflective member 220 to pivot to the third position P3. Further, 'locking the first shaft 250 to the first end 222 or the second shaft 280 to the second end 224 can be accomplished by methods well known to those of ordinary skill in the art, such as the engagement of a mechanism, magnetic Attraction, attraction of electrostatic forces or other appropriate methods. Fig. 3 is a view showing the configuration of a projection apparatus according to still another embodiment of the present invention. The projection device 10 of the present embodiment is similar to the above-mentioned projection device 100 (as shown in FIG. 1A and FIG. 1B), and the difference between the two is mainly due to the multi-directional projection lens 200b of the projection device 10b of the present embodiment. Instead of the movable reflective element 220 in the projection device 10A, a first medium 201111897 30812 twf.doc/n density filter unit 400 is used. Specifically, the first neutral density filter unit 4 is configured from In the transmission path of the image beam 112 of the rear lens group 210, a first partial light beam H2a of the image beam 112 is reflected by the first-neutral density filter unit 400, and a second partial beam of the image beam 112 is tooth-permeable. A neutral, light-receiving unit 400. The first front lens group mo is disposed on a transmission path from the first partial light beam n2a of the first neutral density filter unit 400, wherein the first partial light beam 112a penetrates the first The front lens group 230 is transmitted to the outside in the first direction D1. The second front lens group 24 is disposed on the transmission path of the second partial beam 112b from the first neutral density filter unit 400, wherein the second partial beam 112b will penetrate The two front lens groups 240 are transmitted to the outside along the second direction D2. The first direction ΓΜ is different from the second direction D2. Thus, the projection lens 2〇0b can divide the image beam 112 into two to image The light beam 112 is projected into two different directions, thereby causing the projection device 10b of the embodiment to achieve dual imaging. In this embodiment, the first neutral density light-emitting unit 4 is, for example, half-transparent. The reflective unit, but the present invention is not limited thereto. In the present embodiment, the multi-directional projection lens 200b further includes two turns 410a, 410b which are mutually abutted against each other, wherein the first neutral density filter unit 400 Located at the interface of the two electrodes 410a, 410b, and is a neutral density filter film. However, in other embodiments, the multi-directional projection lens 2〇〇b may not use the 稜鏡410a, 410b' and the first The neutral density filter unit 4 is a neutral density filter. 15 201111897 ΡΤ 158 ϋ 30812 twf.doc/n FIG. 4 is a schematic structural view of a projection apparatus according to still another embodiment of the present invention. And the above projection device 100b (as shown in Figure 3 The difference between the two is as follows. In the projection apparatus 100c of the present embodiment, the multi-directional projection lens 200c further includes a second neutrality; the light-aware unit 500 and a third front lens group 290. The second neutral density filter unit 500 is disposed on the transmission path of the image beam from the rear lens group 21A. In the present embodiment, the first neutral density filter unit 400 and the second neutral density filter The unit 5〇〇 may be a cross configuration. The second partial beam 112b will pass through the second neutral density filter unit 5〇〇 and be transmitted to the second front lens group 240′ and a third partial beam U2c of the image beam 112 will It is reflected by the second neutral density filter unit 5〇〇. The third front lens group 29 is disposed on the transmission path from the third partial beam of the second neutral density filter unit 500, and the first neutral density filter unit 400 and the second neutral density: Lu (10) The light sheet, 500 is disposed on the first front lens group 23A and the third front lens; ^the third portion of the light beam (10) passes through the third front lens group (4) and is transmitted to the outside in the second direction D3. The third direction D3 is different from the first and second directions D2° such that the 'projection lens 2G〇e can be divided into three beams to split the image beam 112 into the direction, thereby making the real The closing of the material is set to Wei: the weight is - the implementation of the fiscal, the second, the _ degree of the light unit 500 Β, the sun + reflective unit 'but the invention is not limited thereto. In the consistent practice of the knee, the multi-directional projection lens 1〇〇c x a second nickname b, a third 稜鏡 heart 4:; 镜久弟四稜鏡 201111897 PT1580 30812twf.doc/n
420d。第二稜鏡420b承靠第一棱鏡420a。第三稜鏡42〇c 承靠第二稜鏡420b。第四稜鏡420d承靠第三稜鏡420c與 第一稜鏡420a。部分第一中性密度濾光單元400位於第一 稜鏡420a與第二稜鏡420b的交界面，且另一部分第一中 性密度濾光單元位400於第三稜鏡420c與第四稜鏡420d 的交界面。部分第二中性密度濾光單元500位於第一稜鏡 420a與弟四棱鏡420d的交界面，且另一部分第二中性密 度濾光單元500位於第二稜鏡420b與第三稜鏡420c的交 界面。第一中性密度濾光單元4〇〇與第二中性密度濾光單 元500例如各為一中性密度濾光膜。 然而，在其他實施例中，多向投影鏡頭2〇〇c亦可不 採用第一、第二、第三及第四稜鏡42〇a、42〇b、42〇c、42〇d， 而第一中性植、度濾光單元4〇〇與第二中性密度濾光單元 500例如各為一中性密度濾光鏡。 、，不上所述，由於本發明之實施例之多向投影鏡頭採用 可動式反射元絲減影像光束_遞方向，或採用中性 密度濾料it來將縣光束分❹道，因此本發明之實施 例之多向投影鏡頭可將影像光束投射於多個方向上（知如 三個方向上）’進而使採用此多向投影鏡頭 夠達到多重顯像(例如雙重顯像或三重顯像) ί ^二與純便能夠有 增加投難置對不同環境的適用性。 本二已以實施例揭露如上，然其並非用以限定 X 屬技術賴巾具有通f知識者，在不脫離 17 201111897 I>T1580 30812twf.d〇c/n 本發明之精神和範圍内，當可作些許之更動與潤飾，故本 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^發明的任一實施例或申請專利範圍不須達成本發明 所，疼之王部目的或優點或特點。此外，摘要部分和標題 僅疋用來輔助專利文件搜尋之用，並非用來限制本發明之 權利範圍。 【圖式簡單說明】 一圖1A為本發明之一實施例之投影裝置當可動式反射 元件切入影像光束的傳遞路徑時之結構示意圖。 一圖1B為圖1A之投影裴置當可動式反射元件切離影像 光束的傳遞路徑時之結構示意圖。 " 圖2A、圖2B及圖2C分別繪示本發明之另一實施例 之投景>襞置當可動式反射元件切換至第一位置、第二位置 及第三位置時的結構示意圖。 圖3為本發明之又一實施例之投影裝置的結構示意 圖。 圖4為本發明之再一實施例之投影裝置的結構示意 圖。 【主要元件符號說明】 100、100a、100b、100c :投影裝置 11 〇 ·光閥 112 ·’影像光束 18 201111897 PT1580 30812twf.doc/n 112a :第一部分光束 112b :第二部分光束 112c :第三部分光束 120 :照明系統 122 :照明光束 130 :偏振分光元件 200、200a、200b、200c :多向投影鏡頭 210 :後透鏡群 212 :凸透鏡 220 :可動式反射元件 222 ··第一端 224 :第二端 230 :第一前透鏡群 232、242 :凹透鏡 240 :第二前透鏡群 250 :第一支軸 • 260 :致動器 280 :第二支軸 290 :第三前透鏡群 300 :控制單元 400 :第一中性密度濾光單元 410a、410b :稜鏡 420a :第一稜鏡 420b :第二稜鏡 19 201111897 PT1580 30812twf.doc/n 420c :第三稜鏡 420d :第四稜鏡 500:第二中性密度濾光單元420d. The second weir 420b bears against the first prism 420a. The third 稜鏡42〇c bears the second 稜鏡420b. The fourth crucible 420d bears the third crucible 420c and the first crucible 420c. A portion of the first neutral density filter unit 400 is located at the interface of the first 稜鏡 420a and the second 稜鏡 420b, and another portion of the first ND filter unit 400 is at the third 稜鏡 420c and the fourth 稜鏡420d interface. A portion of the second neutral density filter unit 500 is located at the interface of the first 稜鏡 420a and the quaternary prism 420d, and another portion of the second ND filter unit 500 is located at the second 稜鏡 420b and the third 稜鏡 420c. Interface. The first neutral density filter unit 4A and the second neutral density filter unit 500 are each, for example, a neutral density filter film. However, in other embodiments, the multi-directional projection lens 2c may also not use the first, second, third, and fourth 稜鏡42〇a, 42〇b, 42〇c, 42〇d, and A neutral implant, degree filter unit 4〇〇 and a second neutral density filter unit 500 are each, for example, a neutral density filter. In the above, the multi-directional projection lens of the embodiment of the present invention uses a movable reflection element to reduce the image beam direction, or uses a neutral density filter to divide the county beam, so the present invention The multi-directional projection lens of the embodiment can project the image beam in multiple directions (as known as three directions), thereby enabling multiple imaging (for example, dual imaging or triple imaging) to be achieved by using the multi-directional projection lens. ί ^ 2 and pure can have increased applicability to different environments. The second embodiment has been disclosed above by way of example, but it is not intended to limit the knowledge of the X-genuine technology, and it does not deviate from the spirit and scope of the present invention without departing from the spirit and scope of the present invention. A few modifications and refinements may be made, and the scope of protection of the present invention is defined by the scope of the appended claims. In addition, any embodiment or patent application scope of the invention does not require the object or advantage or feature of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1A is a schematic view showing the structure of a projection apparatus according to an embodiment of the present invention when a movable reflection element is cut into a transmission path of an image beam. FIG. 1B is a schematic structural view of the projection device of FIG. 1A when the movable reflective element cuts off the transmission path of the image beam. < 2A, 2B, and 2C respectively illustrate a structure of a projection of another embodiment of the present invention when the movable reflective element is switched to the first position, the second position, and the third position. Fig. 3 is a view showing the configuration of a projection apparatus according to still another embodiment of the present invention. Fig. 4 is a view showing the configuration of a projection apparatus according to still another embodiment of the present invention. [Description of main component symbols] 100, 100a, 100b, 100c: Projection device 11 光 light valve 112 · 'Image beam 18 201111897 PT1580 30812twf.doc/n 112a : First partial beam 112b : Second partial beam 112c : Third part Light beam 120: illumination system 122: illumination beam 130: polarization beam splitting element 200, 200a, 200b, 200c: multi-directional projection lens 210: rear lens group 212: convex lens 220: movable reflection element 222 · first end 224: second End 230: first front lens group 232, 242: concave lens 240: second front lens group 250: first support shaft 260: actuator 280: second support shaft 290: third front lens group 300: control unit 400 : First neutral density filter unit 410a, 410b: 稜鏡 420a: first 稜鏡 420b: second 稜鏡 19 201111897 PT1580 30812twf.doc / n 420c: third 稜鏡 420d: fourth 稜鏡 500: Two neutral density filter unit
Al、A2、A3 :光轴 D1 :第一方向 D2 :第二方向 D3 :第三方向 P1 :第一位置 P2 :第二位置 P3 :第三位置Al, A2, A3: optical axis D1: first direction D2: second direction D3: third direction P1: first position P2: second position P3: third position
2020