M385018M385018
A κ 五、新型說明： 【新型所屬之技術領域】 本創作係一種投影裝置，尤其係關於一種具有鏡頭旋轉功能 之投影機。 ^ 【先前技術】 曰常生活中，投影裝置經常被用來將圖文或影像資料投射放 大於投射面上，令使用者觀看時更具有視覺上的舒適性，且電子 設備均有朝向輕、薄、短小之設計趨勢來符合人性的需求，因此 投影裝置也不例外地趨於微小化，俾能應用於3G手機、PDA等 電子產品，亦或成為一種可隨身攜帶的小型投影裝置，藉此使用 ^ - 者可隨處利用投影裝置來播放欲觀賞的影片，輕鬆地達到娛樂之 - 效果。 請參閱圖1，其為習知投影裝置之投影示意圖，投影裝置1 放置於桌面3上，其包括照明系統10、影像顯示裝置11以及光學 鏡頭12。照明系統10提供給影像顯示裝置11 一光源，而光學鏡 頭12將後方的影像顯示裝置11的影像投射至前方的投射面2,使 影像顯示裝置11之影像被放大顯示於投射面2上。一般而言，光 學鏡頭12的設計除了將影像顯示裝置11的影像往前投射外，還 3 M385018 會使其投射區域具有一投射偏移量，使顯示於投射面2的影像向 某一方向偏移（例如，向上偏移），以避免顯示於投射面2的影像低 於桌面3而不利使用者觀看。 其中，使用者更可以將投影裝置1以直立的方式擺設於桌面3 上，使光學鏡頭12可以朝向上方投射；請參閱圖2與圖3A、圖 3B，圖2為習知投影裝置向上投影示意圖、圖3A為習知投影裝置 放置於床尾時之向上投影側視圖，而圖3B為習知投影裝置放置於 床頭時之向上投影側視圖。 如圖2與圖3A所示，投影裝置1以直立的方式放置於床尾的 桌面4上，使得影像顯示裝置11之影像A被投射於天花板5上， 使用者6因此可輕鬆自在地躺在床上觀看；惟，此將投影裝置1 放置於床尾之缺失在於，將令躺在床上的使用者6要操作或調整 投影裝置1時，一定要特別起身至床尾才能接觸到投影裝置1，如 此一來於操作上顯將存在相當的不便利性。 特別注意的是，受到投射偏移量的影響，習知投影裝置1通 常也只能設置於床尾的方向，因為若是如圖3B所示般設置於床頭 櫃7，將會使投影裝置1的投射區域超過天花板5的範圍。亦即， 圖3B所示影像晝面A的一部份影像A2仍會被投射在天花板5 上，但影像畫面A的另一部分影像A1(人物臉部，其係為投射區 域超過天花板範圍的部分）則會被投射在使用者6後方的牆壁8 上，進而造成使用者6無法觀看。 4 M385018 再者，倘若使用者6將設置於床頭櫃7的投影裝置1進行180度 旋轉，其如圖4所示，且圖4A為將習知投影裝置旋轉180度後向 上投影示意圖，圖4B為將習知投影裝置旋轉180度後向上投影側 視圖，此時投影裝置1内的影像顯示裝置11連同光學鏡頭12將 會被旋轉180度，使得影像顯示裝置11的影像畫面A也相對應地 被以反方向投射，進而使影像晝面A完全地呈現於天花板5上， 但此將造成影像畫面A上下左右顛倒，亦令使用者無法觀看。 【新型内容】 本創作之目的，在提供一種將顯示元件之影像晝面投射至一 投射面之特定方位上的投影機。 本創作之另一目的，在提供一種具有鏡頭旋轉功能之投影 機，尤其係關於一種可將顯示元件之影像畫面以一水平及/或垂直 位移之方式投射至一投射面之投影機，以方便使用者觀看與操作。 於一較佳實施例中，本創作提供一種投影機，包括：顯示元 件，用以呈現影像畫面；照明系統，用以提供光源予顯示元件； 鏡頭，位於投射面與顯示元件之間，用以投射影像畫面至投射面， 使影像畫面被放大顯示於投射面上，且藉由旋轉鏡頭而改變投射 影像畫面之方向；第一殼體，用以容置鏡頭；以及第二殼體，活 動連結於第一殼體，用以容置照明系統與顯示元件；其中，包含 5 M385018 有顯示元件之第二殼體固定不動，且第一殼體可帶動鏡頭相對於 第二殼體進行轉動，以於鏡頭被旋轉至一特定角度時，顯示元件 上之影像晝面被投射至投射面之不同方位上，使影像晝面於投射 面上呈現一水平及/或垂直位移之效果。 於一較佳實施例中，當該特定角度為〇度時，影像晝面被投 射於投射面之第一方位上。 於一較佳實施例中，當鏡頭被向右旋轉至該特定角度為90度 時，影像畫面被以向右與向下位移之方式投射於投射面之第二方 位上，使第二方位處於第一方位之右下方。 於一較佳實施例中，當鏡頭被向右旋轉至該特定角度為180 度時，影像晝面被以向下位移之方式投射於投射面之第三方位 上，使第三方位處於第一方位之下方。 於一較佳實施例中，當鏡頭被向右旋轉至該特定角度為270 度時，影像晝面被以向左與向下位移之方式投射於投射面之第四 方位上，使第四方位處於第一方位之左下方。 於一較佳實施例中，顯示元件係為穿透式液晶面板。 於一較佳實施例中，照明系統係利用複數個發光二極體作為 發光源。 於一較佳實施例中，鏡頭包括第一與第二透鏡群組，且第二 透鏡群組設置於第一透鏡群組與顯示元件之間，用以將來自且垂 直於顯示元件之光源折射至第一透鏡群組。 6 M385018 雙凹透鏡以及凸出方向與影像投射方向相反之第二凸透鏡。 於一較佳實施例中，第二透鏡群組具有正屈光度，包括至少 一凸出方向與影像投射方向相反之第三凸透鏡。 於一較佳實施例中，本創作亦提供一種投影機，包括：顯示 元件，用以呈現影像畫面；照明系統，用以提供光源予顯示元件； 以及鏡頭，位於投射面與顯示元件之間，用以投射影像晝面至投 射面，使影像畫面被放大顯示於投射面上，鏡頭包括：第一與第 二透鏡群組，第二透鏡群組設置於第一透鏡群組與顯示元件之 間，用以將來自且垂直於顯示元件之光源折射至第一透鏡群組； 其中，第二透鏡群組與顯示元件具有共同中心軸，而第一透鏡群 組之中心軸以相距一間隔距離至少設置於共同中心軸之下方、左 方或右方等方向中之任一者，以使被顯示於投射面之影像晝面的 中心軸處於共同中心軸之相對應下方、左方或右方等方向中之任 一者。 於一較佳實施例中，顯示元件係為一穿透式液晶面板。 於一較佳實施例中，照明系統係利用複數個發光二極體作為 發光源。 於一較佳實施例中，第一透鏡群組具有正屈光度，其包括至 少一凸出方向與影像投射方向相同之第一凸透鏡與一凸出方向與 影像投射方向相反之第一非球面透鏡。 於一較佳實施例中，第一透鏡群組更包括第二非球面透鏡、 9 M385018 雙凹透鏡以及凸出方向與影像投射方向相反之第二凸透鏡。 於一較佳實施例中，第二透鏡群組具有正屈光度，包括至少 一凸出方向與影像投射方向相反之第三凸透鏡。 於一較佳實施例中，當光學鏡頭被旋轉時，第二透鏡群組係 以共同中心軸進行自轉動作，而第一透鏡群組之中心軸係以間隔 距離為半徑，並以共同中心軸進行公轉動作，且當光學鏡頭被旋 轉一特定角度後，顯示元件之影像晝面被以一水平及/或垂直位移 之方式投射至投射面之不同方位上。 【實施方式】 請參閱圖5與圖6，圖5為本創作投影機一較佳實施例之不同 視角之外觀結構示意圖，圖6為本創作投影機一較佳實施例之結 構側剖面圖。 投影機9包括第一殼體91與第二殼體92，第一殼體91用以 容置投影用之光學鏡頭93,而第二殼體92用以容置投影機内部的 照明系統94與顯示元件95 ;其中，第一與第二殼體91、92以活 動方式連結，亦即在第二殼體92固定不動之情況下，第一殼體91 可相對於第二殼體92進行轉動。 本實施例中，照明系統94提供光源照射在用以呈現影像畫面 之顯示元件95，再經由投影鏡頭93將呈現於顯示元件95之影像 M385018 投影放大至-投射面刚(如圖8、9所示）上，其中，顯示元件％ 可為穿透式液晶面板，且照明系統94可利用複數個發光二極體作 為發光源。當然’本創作概念之制並不限於使用穿透式液晶面 板或疋以發光一極體作為發光源的投影設備。 . 請參關7’其為本創作《彡機—較佳實_之光學鏡頭結構 示意圖，光學鏡頭93包括第-透鏡群組931與第二透鏡群組阳， .第二透鏡群組932設置於第一透鏡群組931與顯示元件％之間， 籲且與第一透鏡群組931相距一間隔距離⑴，其用以將來自且垂直 於顯示元件95之光源折射至第一透鏡群組931。其中，第一透鏡 群組931沿著第一透鏡群組931之中心軸9311由前方至後方依序 包括凸出方向與影像投射方向相同之第一凸透鏡9312、第二非球 面透鏡9313、雙凹透鏡9314、凸出方向與影像投射方向相反之第 二凸透鏡9315以及凸出方向與影像投射方向相反之第—非球面透 鏡9316’而第二透鏡群組932由一 &出方向與影像投射方向相反 _之第三凸透鏡9321所構成，以上所述光學結構的組合將使得第一 與第二透鏡群組93卜932皆具有正屈光度，而第一與第二非球面 透鏡9316、9313則用以減少與修正光學結構組合所產生的像差。 此外，改變間隔距離D1的長短可以用來調整光學鏡頭％的 等效焦距。請再度參閱圖5與圖6，第一殼體91包括一具有螺紋 結構9⑴的容置體911，用以容置第一透鏡群組931，且容置體 911活動連結於第一殼體9卜其中，第一殼體91具有螺紋槽μ〕， M385018 且容置體911的螺紋結構9111相對應地設置於第一殼體91的螺 紋槽912内，當容置體911被旋轉時，螺紋結構9111會沿著螺紋 槽912移動，使得容置體911可相對於第一殼體91進行轴向移動 而改變間隔距離D1，當然，容置體911與第一殼體91的活動連 接方式並不侷限於螺紋結構9111與螺紋槽912的組合。 接下來說明本案之創作精神，請再度參閱圖7，第二透鏡群組 932與顯示元件95具有一共同中心軸9322，且第一透鏡群組931 之中心軸9311與共同中心軸9322相距一間隔距離D2，其中，當 包含有顯示元件95的第二殼體92固定不動，而第一殼體91帶動 光學鏡頭93進行轉動時，第二透鏡群組932會以共同中心軸9322 進行自轉動作，而第一透鏡群組931之中心軸9311則以間隔距離 D2為半徑，並且以共同中心軸9322進行公轉動作。 特別說明的是，藉由旋轉光學鏡頭93，係可以改變投影機9 投射影像晝面的方向；申言之，請參閱圖8，圖8A為本創作投影 機一較佳實施例之光學鏡頭被旋轉前之光路示意圖，圖8B為圖 8A所示之光學鏡頭被向右（左）旋轉180度後之光路示意圖。 由圖8所示之光學鏡頭93的光路933可知，光學鏡頭93被 轉前，投影機9係將顯示元件95上之影像畫面朝投影面100之上 方投射，而光學鏡頭93被向右（左）旋轉180度後，投影機9係轉 換為將顯示元件95上之影像晝面朝投影面100之下方投射。 詳言之，當光學鏡頭93被旋轉至一特定角度時，顯示元件95 12 M385018 上之影像畫面會被投射至投射面100的不同方位上，使影像畫面 於投射面100上呈現位移的效果，請參閱圖9，圖9A為本創作投 影機一較佳實施例之投影示意圖，圖9B為本創作投影機另一較佳 實施例之投影示意圖；當光學鏡頭93被轉前（亦即特定角度為0 度時），影像畫面被投射至投射面的第一方位101上，而當光學鏡 頭93被向右（左）旋轉180度後，被投射且顯示於投射面100上的 影像畫面則由第一方位101向下移動至第三方位103。同理可言， 當光學鏡頭93被向右旋轉90度後，被投射且顯示於投射面100 上的影像晝面則由第一方位101向右與向下移動至第二方位 102，而當光學鏡頭93被向右旋轉270度（向左旋轉90度）後，被 投射且顯示於投射面100上的影像畫面則由第一方位101向左與 向下移動至第四方位104。 其中，光學鏡頭的組合與設計，可使第一、第二、第三以及 第四方位101、102、103、104上的影像具有重疊區域，即被投射 且顯示於投射面100上的影像晝面位移量小，其如圖9A所示；當 然，亦可使第一、第二、第三以及第四方位101、102、103、104 上的影像不具重疊區域，即被投射且顯示於投射面100上的影像 晝面位移量大，其如圖9B所示。 特別說明的是，本創作投影機9在光學鏡頭93被旋轉時，顯 示元件95始終保持固定不動，使得被投射且顯示於投射面100上 的影像畫面可以呈現一水平及/或垂直位移之效果，而並不會造成 13 M385018 影像畫面的旋轉。舉例來說，請參閱圖ίο，圖10A為本創作投影 機一較佳實施例之向上投影示意圖，圖10B為圖10A所示之向上 投影側視圖，其中，投影機9擺設於床頭櫃7，若在光學鏡頭93 未被旋轉的情況下，顯示元件95上之影像晝面B會被以投射至投 射面100之第一方位101(如圖9所示）的方式投射至天花板5上， 因此影像畫面B的一部份影像B2仍會被投射在天花板5上，但影 像畫面B的另一部分影像B1(人物臉部）投射區域則會超過天花板 5的範圍（如先前技術所述之圖3B)，此時只要將光學鏡頭93向右 (左）旋轉180度，顯示元件95上之影像晝面B則以從投射面100 之第一方位101移動至第三方位103(如圖9所示）的方式被投射至 天花板5，使得影像晝面B完整的呈現於天花板5上，並且不會 造成影像晝面B上下左右的顛倒，其如圖10所示，如此一來，使 用者6將可以在觀看影像畫面之餘，輕鬆地操作或調整擺設於床 頭櫃7的投影機9。 再者，本創作投影機9的應用範疇甚廣，請參閱圖11，圖11A 為本創作投影機一較佳實施例之向右投影示意圖，圖11B為本創 作投影機一較佳實施例之向左投影示意圖。一般而言，投影機9 係擺置於使用者6與投影面100之間，然而此將擋住使用者6的 觀看視線，若是將投影機9擺置於使用者6的左前方，並將光學 鏡頭93向右旋轉90度，使得顯示元件95上之影像畫面以從投射 面100之第一方位101移動至第二方位102(如圖9所示）的方式被 14 M385018 投射至投射面100,如此影像晝面即可呈現於使用者6的正前方卻 不會被投影機9擋住觀看視線，其如圖11A所示；同樣地，可將 投影機9擺置於使用者6的右前方，並將光學鏡頭93向右旋轉270 度（向左旋轉90度），使得顯示元件95上之影像畫面以從投射面 100之第一方位101移動至第四方位104(如圖9所示）的方式被投 射至投射面100,如此影像畫面亦可呈現於使用者6的正前方卻不 會被投影機9擔住觀看視線，其如圖11B所示。 當然，本創作之投影機9亦可不具鏡頭旋轉功能，而於被製 造出廠之前因應其應用範疇與使用者6的需求預先固定投影機9 内的結構配置，使投影機9固定投射影像晝面的投射方向。請再 度參閱圖9，如第一透鏡群組931之中心軸9311以相距間隔距離 D2固定地設置於共同中心軸9322的上方，則顯示於投射面之影 像晝面的中心軸1011處於共同中心軸9322之上方，即影像晝面 固定地被投射於投射面之第一方位101上；同理，如第一透鏡群 組931之中心軸93 11以相距間隔距離D2固定地設置於共同中心 軸9322的右方，則顯示於投射面之影像畫面的中心軸1021處於 共同中心軸9322之右方，即影像晝面固定地被投射於投射面之第 二方位102上；如第一透鏡群組931之中心轴9311以相距間隔距 離D2固定地設置於共同中心軸9322的下方，則顯示於投射面之 影像畫面的中心軸1031處於共同中心軸9322之下方，即影像畫 面固定地被投射於投射面之第三方位103上；如第一透鏡群組931 15 M385018 之中心軸9311以相距間隔距離D2固定地設置於共同中心軸9322 的左方，則顯示於投射面之影像畫面的中心軸1041處於共同中心 軸9322之左方，即影像晝面固定地被投射於投射面之第四方位 104 上。 因此，請參閱圖10A，如使用者6欲長期將投影機9擺設於 床頭櫃7上以利睡前躺在床上觀看，並且投影機9不再作其他的 用途，投影機9只要於出廠前將第一透鏡群組931之中心軸9311 固定的設置於共同中心軸9322的下方，使影像畫面B永遠被投射 至投射面的第三方位1〇3(如圖9所示）上，如此投影機9雖不具鏡 頭旋轉功能仍可達到使用目的。 以上所述僅為本創作之較佳實施例，並非用以限定本創作之 申請專利範圍，因此凡其它未脫離本創作所揭示之精神下所完成 之等效改變或修飾，均應包含於本案之申請專利範圍内。 16 M385018 【圖式簡單說明】 圖1 :係為習知投影裝置之投影示意圖。 圖2 :係為習知投影裝置之向上投影示意圖。 圖3A :係為習知投影裝置放置於床尾之向上投影側視圖。 圖3B :係為習知投影裝置放置於床頭之向上投影側視圖。 圖4A :係為將習知投影裝置旋轉180度後向上投影示意圖。 圖4B :係為將習知投影裝置旋轉180度後向上投影側視圖。 圖5:係為本創作投影機一較佳實施例之不同視角之外觀結構示意 圖。 圖6:係為本創作投影機一較佳實施例之結構側剖面圖。 圖7:係為本創作投影機一較佳實施例之光學鏡頭結構示意圖。 圖8A :係為本創作投影機一較佳實施例之光學鏡頭被旋轉前之光 路示意圖。 圖8B :係為圖8A所示之光學鏡頭被向右（左）旋轉180度後之光 路示意圖。 圖9A:係為本創作投影機一較佳實施例之投影示意圖。 圖9B :係為本創作投影機另一較佳實施例之投影示意圖。 圖10A :係為本創作投影機一較佳實施例之向上投影示意圖。 圖10B :係為圖10A所示之向上投影側視圖。 圖11A :係為本創作投影機一較佳實施例之向右投影示意圖。 圖11B :係為本創作投影機一較佳實施例之向左投影示意圖。 17 M385018 【主要元件符號說明】A κ V. New description: [New technical field] This creation is a projection device, especially for a projector with lens rotation function. ^ [Prior Art] In normal life, projection devices are often used to project graphics or image data onto the projection surface, making the user more visually comfortable when viewing, and the electronic devices are light, Thin and short design trends to meet the needs of human nature, so projection devices are no exception to miniaturization, can be applied to electronic products such as 3G mobile phones, PDAs, or as a small projection device that can be carried around. With ^ - you can use the projection device to play the movie you want to watch, and easily achieve the entertainment-effect. Referring to FIG. 1, which is a schematic view of a projection of a conventional projection device, the projection device 1 is placed on a table top 3, which includes an illumination system 10, an image display device 11, and an optical lens 12. The illumination system 10 supplies a light source to the image display device 11, and the optical lens 12 projects the image of the rear image display device 11 to the front projection surface 2, so that the image of the image display device 11 is enlarged and displayed on the projection surface 2. In general, the design of the optical lens 12 is not only projecting the image of the image display device 11 forward, but also the 3 M385018 has a projection offset for the projection area, so that the image displayed on the projection surface 2 is biased in a certain direction. Move (for example, offset upward) to avoid the image displayed on the projection surface 2 being lower than the desktop 3 and not being viewed by the user. The user can display the projection device 1 on the table top 3 in an upright manner so that the optical lens 12 can be projected upwards. Referring to FIG. 2 and FIG. 3A and FIG. 3B, FIG. 2 is a schematic diagram of the upward projection of the conventional projection device. FIG. 3A is an upward projection side view of a conventional projection device placed at the end of the bed, and FIG. 3B is an upward projection side view of the conventional projection device placed on the bed. As shown in FIG. 2 and FIG. 3A, the projection device 1 is placed in an upright manner on the table top 4 of the bed, so that the image A of the image display device 11 is projected on the ceiling 5, so that the user 6 can easily lie in the bed. Viewing; however, the lack of placing the projection device 1 at the end of the bed is such that when the user 6 lying on the bed wants to operate or adjust the projection device 1, it is necessary to particularly get up to the end of the bed to access the projection device 1, thus There will be considerable inconvenience in operation. It is particularly noted that the conventional projection device 1 can only be placed in the direction of the tail of the bed due to the influence of the projection offset, because if it is placed in the bedside cabinet 7 as shown in FIG. 3B, the projection area of the projection device 1 will be made. More than the ceiling 5 range. That is, a part of the image A2 of the image plane A shown in FIG. 3B is still projected on the ceiling 5, but another part of the image A of the image frame A is a person's face, which is a portion of the projection area that exceeds the ceiling. ) will be projected on the wall 8 behind the user 6, causing the user 6 to be unable to view. 4 M385018 Furthermore, if the user 6 rotates the projection device 1 provided on the bedside table 7 by 180 degrees, as shown in FIG. 4, and FIG. 4A is a schematic diagram of the upward projection of the conventional projection device after rotating 180 degrees, FIG. 4B is a schematic view. The conventional projection device is rotated 180 degrees and then projected to the side view. At this time, the image display device 11 in the projection device 1 and the optical lens 12 will be rotated by 180 degrees, so that the image frame A of the image display device 11 is correspondingly Projecting in the opposite direction, so that the image plane A is completely presented on the ceiling 5, but this will cause the image frame A to be upside down and left and right, and the user cannot view it. [New Content] The purpose of this creation is to provide a projector that projects an image plane of a display element onto a specific orientation of a projection surface. Another object of the present invention is to provide a projector having a lens rotation function, in particular to a projector capable of projecting an image of a display element to a projection surface in a horizontal and/or vertical displacement manner for convenience. User viewing and operation. In a preferred embodiment, the present invention provides a projector comprising: a display element for presenting an image frame; an illumination system for providing a light source to the display element; and a lens disposed between the projection surface and the display element for Projecting the image image to the projection surface, causing the image image to be enlargedly displayed on the projection surface, and changing the direction of the projected image frame by rotating the lens; the first housing for accommodating the lens; and the second housing, the active connection a first housing for accommodating the illumination system and the display element; wherein the second housing including the 5 M385018 display element is fixed, and the first housing can drive the lens to rotate relative to the second housing to When the lens is rotated to a specific angle, the image plane on the display element is projected onto different orientations of the projection surface, so that the image surface exhibits a horizontal and/or vertical displacement effect on the projection surface. In a preferred embodiment, when the particular angle is a twist, the image plane is projected onto the first orientation of the projection surface. In a preferred embodiment, when the lens is rotated to the right to the specific angle of 90 degrees, the image frame is projected to the second orientation of the projection surface in a rightward and downward displacement, so that the second orientation is The lower right of the first position. In a preferred embodiment, when the lens is rotated to the right to a certain angle of 180 degrees, the image plane is projected on the third side of the projection surface in a downward displacement manner, so that the third party is in the first position. Below the position. In a preferred embodiment, when the lens is rotated to the right to the specific angle of 270 degrees, the image plane is projected to the fourth orientation of the projection surface in a leftward and downward displacement, so that the fourth orientation In the lower left of the first position. In a preferred embodiment, the display element is a transmissive liquid crystal panel. In a preferred embodiment, the illumination system utilizes a plurality of light emitting diodes as the light source. In a preferred embodiment, the lens includes a first lens group and a second lens group, and the second lens group is disposed between the first lens group and the display element for refracting the light source from and perpendicular to the display element. To the first lens group. 6 M385018 Double concave lens and second convex lens with convex direction opposite to the image projection direction. In a preferred embodiment, the second lens group has a positive refracting power and includes at least one third convex lens having a convex direction opposite to the image projection direction. In a preferred embodiment, the present invention also provides a projector comprising: a display element for presenting an image frame; an illumination system for providing a light source to the display element; and a lens disposed between the projection surface and the display element, The image is displayed on the projection surface, and the image is enlarged and displayed on the projection surface. The lens includes: first and second lens groups, and the second lens group is disposed between the first lens group and the display element. For refracting a light source from and perpendicular to the display element to the first lens group; wherein the second lens group and the display element have a common central axis, and the central axes of the first lens group are at least one distance apart One of the directions below, the left or the right of the common central axis, such that the central axis of the image plane displayed on the projection surface is below the common central axis, left or right, etc. Any of the directions. In a preferred embodiment, the display element is a transmissive liquid crystal panel. In a preferred embodiment, the illumination system utilizes a plurality of light emitting diodes as the light source. In a preferred embodiment, the first lens group has positive refracting power, and includes a first convex lens having at least one convex direction and the same image projecting direction and a first aspherical lens having a convex direction opposite to the image projection direction. In a preferred embodiment, the first lens group further includes a second aspherical lens, a 9 M385018 biconcave lens, and a second convex lens having a convex direction opposite to the image projection direction. In a preferred embodiment, the second lens group has a positive refracting power and includes at least one third convex lens having a convex direction opposite to the image projection direction. In a preferred embodiment, when the optical lens is rotated, the second lens group rotates with a common central axis, and the central axes of the first lens group are separated by a distance and have a common central axis. The revolving action is performed, and after the optical lens is rotated by a specific angle, the image plane of the display element is projected to a different orientation of the projection surface in a horizontal and/or vertical displacement. [Embodiment] Please refer to FIG. 5 and FIG. 6. FIG. 5 is a schematic diagram showing the appearance of different perspectives of a preferred embodiment of the projector. FIG. 6 is a side cross-sectional view of a preferred embodiment of the projector. The projector 9 includes a first housing 91 for accommodating the optical lens 93 for projection, and a second housing 92 for accommodating the illumination system 94 inside the projector. The display member 95; wherein the first and second housings 91, 92 are movably coupled, that is, the first housing 91 is rotatable relative to the second housing 92 in the case where the second housing 92 is stationary. . In this embodiment, the illumination system 94 provides a light source to illuminate the display element 95 for presenting an image, and then projects the image M385018 presented on the display element 95 to the projection surface via the projection lens 93 (as shown in FIGS. 8 and 9). In the above, wherein the display element % can be a transmissive liquid crystal panel, and the illumination system 94 can utilize a plurality of light emitting diodes as the light source. Of course, the concept of the present inventive concept is not limited to a projection apparatus using a transmissive liquid crystal panel or a light-emitting one as a light-emitting source. Please refer to 7' which is the schematic diagram of the optical lens structure of the creation "Pushing Machine - Better Real", the optical lens 93 includes the first lens group 931 and the second lens group Yang, the second lens group 932 is set. Between the first lens group 931 and the display element %, a distance (1) is spaced from the first lens group 931 for refracting the light source from and perpendicular to the display element 95 to the first lens group 931. . The first lens group 931 includes a first convex lens 9312, a second aspheric lens 9313, and a biconcave lens in the same direction as the image projection direction from the front to the rear along the central axis 9311 of the first lens group 931. 9314, a second convex lens 9315 having a convex direction opposite to the image projection direction, and a first aspherical lens 9316' having a convex direction opposite to the image projection direction, and the second lens group 932 is opposite to the image projection direction by an & The third convex lens 9321 is configured, and the combination of the optical structures described above will cause the first and second lens groups 93 932 to have positive refracting power, and the first and second aspherical lenses 9316, 9313 to reduce Aberration produced by combining with a modified optical structure. In addition, changing the length of the separation distance D1 can be used to adjust the equivalent focal length of the optical lens %. Referring to FIG. 5 and FIG. 6 again, the first housing 91 includes a receiving body 911 having a threaded structure 9 (1) for receiving the first lens group 931, and the receiving body 911 is movably coupled to the first housing 9 The first housing 91 has a threaded groove μ, M385018, and the threaded structure 9111 of the receiving body 911 is correspondingly disposed in the threaded groove 912 of the first housing 91. When the receiving body 911 is rotated, the thread The structure 9111 is moved along the thread groove 912, so that the receiving body 911 can be axially moved relative to the first housing 91 to change the separation distance D1. Of course, the movable body 911 and the first housing 91 are movably connected. It is not limited to the combination of the threaded structure 9111 and the threaded groove 912. Next, the creative spirit of the present invention will be described. Referring again to FIG. 7, the second lens group 932 and the display element 95 have a common central axis 9322, and the central axis 9311 of the first lens group 931 is spaced apart from the common central axis 9322. a distance D2, wherein when the second housing 92 including the display element 95 is fixed, and the first housing 91 drives the optical lens 93 to rotate, the second lens group 932 rotates with the common central axis 9322. The central axis 9311 of the first lens group 931 has a radius of the separation distance D2 and revolves with the common central axis 9322. In particular, by rotating the optical lens 93, the direction in which the projector 9 projects the image plane can be changed. For the sake of reference, please refer to FIG. 8. FIG. 8A shows an optical lens of a preferred embodiment of the projector. Schematic diagram of the optical path before rotation, and FIG. 8B is a schematic diagram of the optical path after the optical lens shown in FIG. 8A is rotated 180 degrees to the right (left). It can be seen from the optical path 933 of the optical lens 93 shown in FIG. 8 that before the optical lens 93 is rotated, the projector 9 projects the image on the display element 95 toward the upper side of the projection surface 100, and the optical lens 93 is turned to the right (left). After being rotated by 180 degrees, the projector 9 is converted to project the image plane on the display element 95 below the projection surface 100. In detail, when the optical lens 93 is rotated to a specific angle, the image frame on the display element 95 12 M385018 is projected onto different orientations of the projection surface 100, so that the image image is displaced on the projection surface 100. Please refer to FIG. 9. FIG. 9A is a schematic view of a projection of a preferred embodiment of the projector. FIG. 9B is a schematic view of another projection of the projector according to another preferred embodiment; when the optical lens 93 is rotated (ie, a specific angle) When it is 0 degrees, the image frame is projected onto the first orientation 101 of the projection surface, and when the optical lens 93 is rotated 180 degrees to the right (left), the image image projected and displayed on the projection surface 100 is composed of The first orientation 101 moves down to the third party bit 103. Similarly, when the optical lens 93 is rotated 90 degrees to the right, the image plane projected and displayed on the projection surface 100 is moved from the first orientation 101 to the right and downward to the second orientation 102, and when After the optical lens 93 is rotated 270 degrees to the right (90 degrees to the left), the image frame projected and displayed on the projection surface 100 is moved leftward and downward by the first orientation 101 to the fourth orientation 104. The combination and design of the optical lens can make the images on the first, second, third and fourth orientations 101, 102, 103, 104 have overlapping regions, that is, images projected and displayed on the projection surface 100. The amount of surface displacement is small, as shown in FIG. 9A; of course, the images on the first, second, third, and fourth orientations 101, 102, 103, and 104 may also have no overlapping regions, that is, projected and displayed on the projection. The amount of image pupil displacement on the face 100 is large, as shown in Fig. 9B. In particular, when the optical projector 93 is rotated, the display element 95 is always fixed, so that the image frame projected and displayed on the projection surface 100 can exhibit a horizontal and/or vertical displacement effect. , and does not cause the rotation of the 13 M385018 image. For example, please refer to FIG. 10A, FIG. 10A is a schematic diagram of an upward projection of a preferred embodiment of the projector, and FIG. 10B is an upward projection side view of FIG. 10A, wherein the projector 9 is disposed on the bedside cabinet 7, if In the case where the optical lens 93 is not rotated, the image plane B on the display element 95 is projected onto the ceiling 5 in a first orientation 101 (shown in FIG. 9) projected onto the projection surface 100, so that the image A part of the image B2 of the picture B will still be projected on the ceiling 5, but another part of the image B1 (personal face) projection area of the image picture B will exceed the range of the ceiling 5 (Fig. 3B as described in the prior art) At this time, as long as the optical lens 93 is rotated 180 degrees to the right (left), the image plane B on the display element 95 is moved from the first orientation 101 of the projection surface 100 to the third position 103 (as shown in FIG. 9). The way is projected to the ceiling 5, so that the image plane B is completely presented on the ceiling 5, and does not cause the image plane B to be upside down, left and right, as shown in FIG. 10, so that the user 6 will be able to Easily watch the video Furnishings for adjustment of the bed or the head 7 of the projector cabinet 9. Furthermore, the application scope of the projector 9 is very wide. Please refer to FIG. 11. FIG. 11A is a schematic diagram of a projection to the right of a preferred embodiment of the projector, and FIG. 11B is a preferred embodiment of the projector. Project the schematic to the left. In general, the projector 9 is placed between the user 6 and the projection surface 100, however this will block the viewing line of the user 6, if the projector 9 is placed on the left front of the user 6, and the optical The lens 93 is rotated 90 degrees to the right, so that the image frame on the display element 95 is projected to the projection surface 100 by 14 M385018 in a manner moving from the first orientation 101 of the projection surface 100 to the second orientation 102 (as shown in FIG. 9). Thus, the image plane can be presented directly in front of the user 6 without being blocked by the projector 9 as shown in FIG. 11A; likewise, the projector 9 can be placed on the right front of the user 6. The optical lens 93 is rotated 270 degrees to the right (90 degrees to the left), so that the image on the display element 95 is moved from the first orientation 101 of the projection surface 100 to the fourth orientation 104 (as shown in FIG. 9). The mode is projected onto the projection surface 100 such that the image frame can also be presented directly in front of the user 6 without being held by the projector 9 as viewed in FIG. 11B. Of course, the projector 9 of the present invention may also have no lens rotation function, and the structure of the projector 9 is fixed in advance according to the application scope and the needs of the user 6 before being manufactured, so that the projector 9 fixes the projection image. The direction of the projection. Referring again to FIG. 9, if the central axis 9311 of the first lens group 931 is fixedly disposed above the common central axis 9322 at a distance D2, the central axis 1011 of the image plane displayed on the projection surface is at a common central axis. Above the 9322, the image pupil plane is fixedly projected on the first orientation 101 of the projection surface; for the same reason, the central axis 93 11 of the first lens group 931 is fixedly disposed on the common central axis 9322 at a distance D2 apart from each other. On the right side, the central axis 1021 of the image frame displayed on the projection surface is on the right side of the common central axis 9322, that is, the image pupil plane is fixedly projected on the second orientation 102 of the projection surface; for example, the first lens group 931 The central axis 9311 is fixedly disposed below the common central axis 9322 at a distance D2. The central axis 1031 of the image displayed on the projection surface is below the common central axis 9322, that is, the image is fixedly projected on the projection surface. The third axis 103 of the first lens group 931 15 M385018 is fixedly disposed on the left side of the common central axis 9322 at a distance D2, and is displayed on the projection surface. The central axis 1041 at the left of the image frame 9322 of the common central axis, i.e., the image plane fixedly day is projected onto the projection surface 104 of the fourth orientation. Therefore, referring to FIG. 10A, if the user 6 wants to hang the projector 9 on the bedside table 7 for a long time to watch in bed before going to bed, and the projector 9 is no longer used for other purposes, the projector 9 will only be shipped before leaving the factory. The central axis 9311 of the first lens group 931 is fixedly disposed below the common central axis 9322, so that the image frame B is always projected onto the third-party position 1〇3 (shown in FIG. 9) of the projection surface, so that the projector 9 Although it does not have the lens rotation function, it can still be used. The above description is only the preferred embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention. Therefore, any equivalent changes or modifications made without departing from the spirit of the present invention should be included in the present case. Within the scope of the patent application. 16 M385018 [Simple description of the diagram] Figure 1 is a schematic diagram of projection of a conventional projection device. Figure 2 is a schematic diagram showing the upward projection of a conventional projection device. Figure 3A is an upwardly projected side view of a conventional projection device placed at the end of the bed. Figure 3B is an upwardly projecting side view of a conventional projection device placed on a bed. FIG. 4A is a schematic diagram of upward projection after rotating a conventional projection device by 180 degrees. FIG. 4B is a side view of the upward projection after rotating the conventional projection device by 180 degrees. Fig. 5 is a schematic view showing the appearance of a different perspective of a preferred embodiment of the present projector. Figure 6 is a side cross-sectional view showing the structure of a preferred embodiment of the present projector. FIG. 7 is a schematic view showing the structure of an optical lens according to a preferred embodiment of the present projector. Fig. 8A is a schematic view showing the optical path before the optical lens of the preferred embodiment of the projector is rotated. Fig. 8B is a schematic view showing the optical path after the optical lens shown in Fig. 8A is rotated 180 degrees to the right (left). FIG. 9A is a schematic view showing the projection of a preferred embodiment of the present projector. FIG. 9B is a schematic view showing the projection of another preferred embodiment of the present projector. FIG. 10A is a schematic diagram showing an upward projection of a preferred embodiment of the present projector. Figure 10B is an upwardly projected side view of Figure 10A. Figure 11A is a schematic view showing the projection to the right of a preferred embodiment of the present projector. FIG. 11B is a schematic diagram of the left projection of a preferred embodiment of the present projector. 17 M385018 [Main component symbol description]
1習知之投影裝置 2投射面 3 桌面 4 床尾的桌面 5天花板 6 使用者 7 床頭櫃 8 牆壁 9投影機 10 照明系統 11 影像顯示裝置 12 光學鏡頭 91第一殼體 92第二殼體 93 光學鏡頭 94 照明系統 95顯示元件 1〇〇 投射面 101第一方位 102 第二方位 103第三方位 104 第四方位 911容置體 912 螺紋槽 931第—透鏡群組 932第二透鏡群組 933 光路 ion衫像晝面的中心軸 9111 螺紋結構 1021影像畫面的中心神 1031衫像晝面的中心轴 1041 影像畫面的中心神 9311胃—透鏡群組之中心軸 9312第一凸透鏡 9313第二非球面透鏡 9314 雙凹透鏡 9315第二凸透鏡 9316第一非球面透鏡 9321第三凸透鏡 9322 共同中心軸 A、B影像晝面 A1 A2 ’讀畫面A之部分影像 B1 B2影像晝面B之部分影像 S 透鏡群組與第二透鏡群組之間隔距離 D2第一透鏡群 且之中心軸與共同中心軸之間隔距離 181 conventional projection device 2 projection surface 3 desktop 4 bedside table 5 ceiling 6 user 7 bedside table 8 wall 9 projector 10 illumination system 11 image display device 12 optical lens 91 first housing 92 second housing 93 optical lens 94 Illumination system 95 display element 1 〇〇 projection surface 101 first orientation 102 second orientation 103 third-party position 104 fourth orientation 911 housing 912 thread groove 931 first lens group 932 second lens group 933 light path ion shirt image The central axis of the kneading surface 9111 The thread structure 1011 The center of the image of the image 1031 The center axis of the image is 1041 The center of the image frame 9311 The center axis of the stomach-lens group 9312 The first convex lens 9313 The second aspheric lens 9314 The double concave lens 9315 second convex lens 9316 first aspherical lens 9321 third convex lens 9322 common central axis A, B image plane A1 A2 'part image B1 of reading picture A B2 part of image B of image plane B lens group and second lens The distance between the groups is D2, the distance between the central axis of the first lens group and the common central axis is 18