201015374 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種具觸控功能之主機系統，尤其是一種不 需要觸控面板而能達成觸控功能之主機系統及其執行方法。 【先前技術】 觸控面板（Touch Panel)又稱為觸控榮幕（Touch Screen)，目 前生活中觸控面板的應用相當廣泛，如自動提款機、智慧型手 ® 機、個人數位助理（Personal Digital Assistant，PDA)、工業電腦， 其直覺的輸入方式能夠取代鍵盤、滑鼠或按鍵的操作，在使用 上更加簡單而方便。 製造具觸控功能的顯示裝置係在顯示器的表面安裝上一 片觸控面板’上述之顯示裝置可為液晶顯示器（Liquid Crystal Display ’ LCD)或疋陰極射線管顯不器（Cathode Ray Tube Display，CRT Display)。現今觸控面板之觸控感應技術包括電 容式（Capacitive)、電阻式（Resistive)、表面音波式（Surface Φ Acoustic Wave)以及紅外線式（infrared Ray) 〇 觸控面板為一種表面接收觸控訊號而感應的裝置，觸控訊 號的來源如電磁筆或是手指。上述之感應技術以電阻式觸控面 板以及電容式觸控面板較為普遍。電阻式觸控面板雖然使用壽 命較短，但由於價格低廉，為目前使用較多的感應技術，其原 理係利用電壓降的方式搜尋觸控訊號的座標。電容式觸控面板 則是利用電容感應的原理搜尋觸控訊號的座標，其具有較佳之 感測效果以及耐用之特性。 隨著蘋果（Apple)公司所生產iPhone觸控手機之風行，電容 201015374 ’ 式觸控面板的多點觸控（Multi-Touch)功能已吸引更多廠商投入 研發’在未來的發展上’由於觸控面板屬於人機介面的技術， 具多點觸控功能之電容式觸控面板更能符合人性化的需求，因 此可望超過電阻式觸控面板成為市場上的主流。 上述提及製造具觸控功能的顯示裝置係在顯示器的表面 安裝上一片觸控面板。以液晶顯示器為例，若液晶顯示器的尺 寸為19吋時，則15吋的觸控面板無法應用至19吋的液晶顯 示器，而必須訂做19吋的觸控面板。因此現今具觸控功能的 β 顯不裝置存在著觸控面板價格無法降低，導致顯示裝置的成本 亦無法降低的問題。此外，顯示裝置的尺寸必須與觸控面板的 尺寸相符合，使觸控面板在應用上的機動性不高，減緩其未來 的發展性。 因此需要對上述問題提出一種解決方法。 【發明内容】 ❹ 本發明之—目的在於提供—種具觸控㈣之主機系統及 :執行方法，能使該主機系統不需要具備價格昂貴之觸控面 扳’而能達成觸控之功能。 二發明之另一目的在於提供一種具觸控功能之主機系統 式觸控面板之魏。 使^機^具有如同電容 為^上述目的，本發明之具觸控功能之主機系統包括一 及一h ^單几一第—影像感測單元、—標的辨識單元以 定位單元。螢幕電性連接至一主 之影像。輸入單元用以接觸勞幕i 顯示主機所提供 堂綦第—影像感測單元設置於感 6 201015374 - 測範圍涵蓋螢幕之處，用以感測螢幕所顯示之影像。標的辨識 單元連接第一影像感測單元，用在辨識出螢幕上的輸入單元。 定位單元連接第一影像感測單元，用以偵測輸入單元接觸螢幕 上之XY座標值，並將XY座標值傳回主機，以供主機根據XY 座標值判斷輸入單元接觸螢幕之影像所對應之功能。 本發明之具觸控功能之主機系統的執行方法，包括下列步 驟：一第一影像感測單元感測一螢幕所顯示之影像；一標的辨 識單元在螢幕上辨識出一輸入單元；當辨識出螢幕上的輸入單 〇 元之後，一定位單元偵測輸入單元接觸螢幕上之XY座標值； 以及將XY座標值傳回一主機，以供主機根據XY座標值判斷 輸入單元接觸螢幕之影像所對應之功能。 本發明之具觸控功能之主機系統及其執行方法藉由偵測 輸入單元接觸螢幕上之χγ座標值，使主機系統中的一般螢幕 不需額外安裝觸控面板而能具有觸控功能，降低整個主機系統 之成本，尤其是當螢幕尺寸越大時，習知技術必須訂製與螢幕 尺寸相同之觸控面板，並將觸控面板安裝於螢幕上才能使螢幕 Φ 具有觸控功能，而本發明只需將第一影像感測單元設置於感測 範圍能涵蓋整個螢幕之處，即可使螢幕具有觸控功能。再者， 本發明能同時偵測多點座標值的方式，使螢幕如同觸控面板具 有多點觸控的功能，但其成本卻比昂貴之觸控面板更低。 【實施方式】 以下將參照所附圖式詳細說明本發明之技術内容。 請參考第1圖，係顯示本發明第一實施例之主機系統100 的方塊圖。主機系統100包括一螢幕102電性連接至一主機 7 201015374 112、一輸入單元J 〇4、—一 單一及一定位單元110W象感測单元106、-標的辨識 Μ二機112如桌上型電腦、筆記型電腦、自動提款機之主機、 =式遊樂機台之主機，螢幕m用以顯示主機112所提二 :像1U。輸入單元104供一使用者接觸勞幕1〇2，舉凡如二 手指筆等長形且其—側為尖端狀之物體皆可作為輪 參 ❹ 处用以感測螢幕102所顯示之影像。 的辨識早疋108連接第一影像感測單元106,用以辨識出螢^ 102上的輸入單元⑽。定位單元U。連接第-影像感測t 106 ’用以谓測輸入單元1〇4接觸勞幕1〇2上之χγ座標值 (Xl’Y〇,並將所傾測到的χγ座標（χπ)值傳回主機112Γ以 供主機112根據ΧΥ座標值（χ,，γι)判斷輸入單元ι〇4接觸榮幕 102之影像114所對應之功能。 上述所對應之功能視主機112之種類而定，一般而言為主 機112内之程式。以桌上型電腦或是筆記型電腦為例勞幕⑽ 所顯示之影像m如作業系統之晝面，作業系統令包括各種不 同應用程式供使用者執行。當使用者以輸入單元104接觸勞幕 102時，標的辨識單元1〇8以影像處理的方式辨識出螢幕 上的輸入單元104，接著定位單元11〇偵測輸入單元1〇4之尖 端狀接觸螢幕上102之Χγ座標值（Χι Υι)，其中&代表螢幕 1〇2水平方向的座標值，¥1代表螢幕1〇2垂直方向的座標值。 所偵測到的座標值（X丨，Yl)會傳回主機112以供主機U2判斷使 用者所選擇勞幕102上之功能’如點選各種應用程式之功能 列。因此螢幕102就好比具觸控功能一樣，直接在螢幕1〇2上 8 201015374 * 點選即可操作各種應用程式。 在另一實施例中，若主機112為一投幣式遊戲機台，則螢 幕102所顯不之畫面為包括多種遊戲之遊戲選單，當作為輸入 單元104之手指點選螢幕1〇2時’第一影像偵測單元1〇6將所 摘測到的座標值（ΧιΥι)傳回主機U2，主機丨12判斷使用者所 選取的遊戲，並執行該遊戲。 上述第一影像感測單元1〇6為一外接式攝影機，需要使用 時將外接式攝影機與主機112連接，使用完畢後則可將外接式 ⑩攝影機從主機112上卸除，達到快速拆除以及安裝之目的。而 外接式攝影機與主機112連接之介面係選自由通用串列匯流排 (Universal Serial Bus，USB)、IEEE 1394 以及無線(Wireless)所 構成之群組中之任一 β 2本實施例中，第一影像感測單元1〇6、標的辨識單元ι〇8 以及疋位單το 11G係分職立設置。帛2圖係顯示第丨圓中之 第一影像感測單元106、標的辨識單元1〇8以及定位單元⑽ 整合成-模組之示意圖，將上述三者整合成一模組後更能增加 ©主機系統_之機動性。在另—實施射，影像感測單元⑽ 為内建於主機112之攝影機。但無論攝影機外接或内建於主機 112,對於解析度之要求無需太高，—般而言，如萬畫素的解 析度即可感測到清晰之畫面以供標的辨識單元108以及定位單 元110作後續處理。 上述之標的辨識單元 可辨識出輸入單元104，以及定 =元叫貞測輸入單幻G6接觸絲102之χγ座標值的功 月b白可選擇由硬趙或軟體實現。 第一影像感測單元 106更可包括一伸縮裝置，以供使用者 9 201015374 依據實際需求調整第一影像感測單元i 06與螢幕丨02之間的距 離，使定位單元110在偵測輸入單元1〇4之尖端狀接觸螢幕上 之XY座標值（Χ^ΥΟ時更加精確。 請參考第3圖，係顯示本發明第二實施例之主機系統1〇〇, 的方塊圖。第3圖中與第1圖中相同元件具有相同的編號且具 有相同的功能，故此不在贅述。兩者之差別為第3圖之主機系 統100’還包括一第二影像感測單元116如一攝影機，設置於螢 幕102之一旁側，用以感測輸入單元1〇4以及螢幕1〇2接觸之 © 影像，即感測螢幕102表面，並將輸入單元1 〇4以及螢幕i 〇2 所接觸之影像114傳送至主機112,以供主機112判斷輸入單 元104以及螢幕102之接觸狀態，如接觸面積大小，接觸時間 等。以輸入單元104以及螢幕1〇2之接觸面積為例，當輸入單 元1〇4為使用者之手指時，主機112判斷接觸面積為小面積代 表手指執行輕碰的狀態；相反地’若主機112判斷接觸面積為 大面積則代表手指執行重壓的狀態。 主機112可根據第一影像感測單元106搭配第二影像感測 ® 單元116作更精準的判斷，例如主機112根據第二影像感測單 元110所傳回輸入單元104以及螢幕1〇2接觸之影像lu，判 斷輸入單元104與螢幕102 —直處於接觸的狀態，另一方面， 第一影像感測單元106所偵測的XY座標值（Xl，Yl)代表輸入單 元104之移動方向，综合上述資訊可得知輸入單元ι〇4 一直與 螢幕102接觸且從某一點移動至另一點，即代表輸入單元ι〇4 從某一點拖曳至另一點，完成觸控功能的偵測。 在上述第一實施例以及第二實施例中，定位單元11〇能同 時债測多個輸入單元104與螢幕102接觸之座標值，並將同時 201015374 * 偵測到的多個座標值傳回主機112，達成等效於一般電容式觸 控面板的多點觸控功能。 請參閱第4圖，係顯示本發明具觸控功能之主機系統的執 行方法流程圖，包括下列步驟： 步驟S410中，一第一影像感測單元感測一螢幕所顯示之 影像，其中螢幕所顯示之影像為一主機内儲存之程式，如桌上 型電腦之應用程式或投幣式遊樂機台之遊戲選單； ” 步驟S42〇中，一標的辨識單元在螢幕上辨識出一輸入單 © 元’其t輸人單it以供-使用者與勞幕接觸，如電磁筆、手指 或一般筆等長形且其一側為尖端狀之物體； …步驟S430中，當辨識出螢幕上的輸入單元之後，一定位 單元偵測輸入單元接觸螢幕時之χγ座標值；以及 步驟S44〇 t ’將χγ座標值傳回主機以供主機根據 座標值判斷輸入單元接觸榮幕之影像所對應之功能’如執行桌 ^型電腦之應用程式或選擇投幣式遊戲機台之遊戲選單的遊 第:影像感測單元還包括—伸縮袭置，用以調整第一影像 感測單兀與螢幕之間的距離。 ’、 顯示之影像過小或不清晰，測榮幕所 盘螢幕之距齙裝置使第—影像感測單元 他 接近，&第一影像感測單元感測螢幕所顯 像過大造成無法_㈣ ^所顯不之影 單元與登幕之距離拉遠。伸縮裝置使第-影像感測 在上述步驟S41〇中， , 示之影像外，更包括Ζ Γ 測單元感測螢幕所顯 幕接觸之參後包括一第二影像感測單元感測輸入單元以及螢 I接蜩之影像，並將影像 Λ 得送至主機，以供主機㈣輸入單元 201015374 以及螢幕之接觸狀態的步驟。其令主機判斷輸入單元以及螢幕 之接觸狀態包括一接觸面積或一接觸時間。藉此主機可根據第 一影像感測單元搭配第二影像感測單元作更精準的判斷。 疋位單元不僅能偵測單一輸入單元與螢幕接觸之χγ座標 值，亦能同時偵測多個輸入單元與螢幕接觸之χγ座標值，並 將同時偵測到的多個座標值傳回主機，使主機達成等效於一般 電容式觸控面板的多點觸控功能。 本發明之具觸控功能之主機系統藉由偵測輸入單元接觸 ®榮幕之χγ座標值’使主機系統中的一般勞幕不需額外安裝觸 控面板而能具有觸控功能，降低整個主機系統之成本，尤其是 當榮幕尺寸越大時，習知技術必須訂製與螢幕尺寸相同之觸控 面板安裝才能使螢幕具有觸控功能，而本發明只需將第一影像 感測單元設置於感測範圍能涵蓋整個榮幕之處，即可使榮幕具 有觸控功能。再者’本發明能同時摘測多點座標值的方式，使 勞幕具有多點觸控的功能如同觸控面板，但成本比昂貴之觸控 面板低。而將第-影像感測單元、標的辨識單元以及定位單元 ©整合於-模組時，當需要時再將該模組與主機連接使用，相較 於習知技術必須將螢幕與觸控面板安裝固定，本發明更具機動 性0 ^练上所述，本發明符合發明專利要件，爰依法提出專利申 清淮以上所述者僅為本發明之較佳實施例，舉凡熟悉此項技 藝之人士，在爰依本發明精神架構下所做之等效修飾或變化， 皆應包含於以下之申請專利範圍内。 【圖式簡單說明】 12 201015374 ' 第1圖係顯示本發明第一實施例之主機系統的方塊圖； 第2圊係顯示第1圖中之第一影像感測單元、標的辨識單 元以及定位單元整合成一模組之示意圖； 第3圖，係顯示本發明第二實施例之主機系統的方塊圖； 以及 第4圖係顯示本發明具觸控功能之主機系統的執行方法流 程圖。 〇 【主要元件符號說明】 100 ' 1005 主機系統 102 螢幕 104 輸入單元 106 第一影像感測單元 108 標的辨識單元 110 定位單元 112 主機 114 影像 116 第二影像感測單元 S410〜S440 步驟 13[Technical Field] The present invention relates to a host system with a touch function, and more particularly to a host system capable of achieving a touch function without a touch panel and an execution method thereof. [Prior Art] Touch Panel (Touch Panel) is also called Touch Screen. At present, touch panels are widely used in life, such as automatic teller machines, smart hand machines, personal digital assistants ( Personal Digital Assistant (PDA), industrial computer, its intuitive input method can replace the operation of keyboard, mouse or button, which is simpler and more convenient to use. The display device with touch function is mounted on the surface of the display with a touch panel. The display device can be a liquid crystal display (LCD) or a cathode ray tube display (CRT). Display). Touch sensing technologies of touch panels today include capacitive, resistive, surface Φ Acoustic Wave, and infrared ray touch panels for receiving a touch signal on a surface. Inductive device, the source of the touch signal such as an electromagnetic pen or a finger. The above sensing technologies are more common with resistive touch panels and capacitive touch panels. Although the resistive touch panel has a short life, it is a low-cost, currently used sensing technology. The principle is to search for the coordinates of the touch signal by means of voltage drop. The capacitive touch panel uses the principle of capacitive sensing to search for the coordinates of the touch signal, which has better sensing effect and durability. With the popularity of the iPhone touch phone produced by Apple, the multi-touch function of the capacitor 201015374 'touch panel has attracted more manufacturers to invest in the development of the future. The control panel belongs to the human-machine interface technology. The capacitive touch panel with multi-touch function can meet the needs of humanization, so it is expected to surpass the resistive touch panel to become the mainstream in the market. The above-mentioned manufacturing of the display device with touch function is to mount a touch panel on the surface of the display. Taking a liquid crystal display as an example, if the size of the liquid crystal display is 19 ,, the 15 吋 touch panel cannot be applied to the 19 液晶 liquid crystal display, and the 19 吋 touch panel must be customized. Therefore, the current beta-display device with touch function has the problem that the price of the touch panel cannot be lowered, and the cost of the display device cannot be lowered. In addition, the size of the display device must conform to the size of the touch panel, making the touch panel less flexible in application and slowing down its future development. Therefore, it is necessary to propose a solution to the above problems. SUMMARY OF THE INVENTION The present invention is directed to providing a host system with touch (four) and an execution method that enables the host system to achieve a touch function without requiring an expensive touch panel. Another object of the invention is to provide a touch panel of a host system with a touch function. For the above purpose, the host system with touch function of the present invention includes one and one h^ single-first image-sensing unit, and a target identification unit to locate the unit. The screen is electrically connected to a main image. The input unit is used to contact the display screen. The display unit provides the image. The image sensing unit is set to the sense 6 201015374 - The measurement range covers the screen to sense the image displayed on the screen. The target identification unit is connected to the first image sensing unit for identifying the input unit on the screen. The positioning unit is connected to the first image sensing unit for detecting the XY coordinate value of the input unit contacting the screen, and transmitting the XY coordinate value to the host, so that the host determines, according to the XY coordinate value, that the input unit contacts the image of the screen. Features. The method for performing the touch function host system of the present invention comprises the following steps: a first image sensing unit senses an image displayed on a screen; a target identification unit identifies an input unit on the screen; After the input unit on the screen, a positioning unit detects that the input unit contacts the XY coordinate value on the screen; and transmits the XY coordinate value back to a host, so that the host can judge the image of the input unit contacting the screen according to the XY coordinate value. The function. The host system with touch function of the present invention and the execution method thereof can detect the χ coordinate value on the screen by the input unit, so that the general screen in the host system can have the touch function without additional installation of the touch panel, thereby reducing The cost of the entire host system, especially when the screen size is larger, the conventional technology must customize the touch panel with the same size as the screen, and install the touch panel on the screen to make the screen Φ have the touch function, and The invention only needs to set the first image sensing unit to the sensing range to cover the entire screen, so that the screen has a touch function. Furthermore, the present invention can simultaneously detect multi-point coordinate values, so that the screen has a multi-touch function as the touch panel, but the cost is lower than that of the expensive touch panel. [Embodiment] Hereinafter, the technical contents of the present invention will be described in detail with reference to the accompanying drawings. Referring to Fig. 1, there is shown a block diagram of a host system 100 in accordance with a first embodiment of the present invention. The host system 100 includes a screen 102 electrically connected to a host 7 201015374 112, an input unit J 〇 4, a single and a positioning unit 110W like the sensing unit 106, a target identification device 112 such as a desktop computer. The notebook computer, the main body of the cash dispenser, the host of the =-type amusement machine, and the screen m are used to display the host computer 112: like 1U. The input unit 104 is for a user to contact the screen 1 2, and an object such as a two-finger pen and its tip-shaped object can be used as a rim to sense the image displayed on the screen 102. The identification early 108 is connected to the first image sensing unit 106 for recognizing the input unit (10) on the flash 102. Positioning unit U. The connection first image sensing t 106 ' is used to measure the χ coordinate value (Xl'Y〇) of the input unit 1〇4 contacting the screen 1〇2, and returning the measured χγ coordinate (χπ) value. The host 112 is configured to allow the host 112 to determine the function corresponding to the image 114 of the honor screen 102 by the input unit ι 4 according to the ΧΥ coordinate value (χ, γι). The corresponding function depends on the type of the host 112, generally speaking, It is a program in the host computer 112. A desktop computer or a notebook computer is used as an example of the image displayed on the screen (10). For example, the operating system system includes various applications for the user to execute. When the input unit 104 contacts the screen 102, the target identification unit 1〇8 recognizes the input unit 104 on the screen by image processing, and then the positioning unit 11 detects the tip-shaped contact screen 102 of the input unit 1〇4. Χγ coordinate value (Χι Υι), where & represents the coordinate value of the horizontal direction of the screen 1〇2, and ¥1 represents the coordinate value of the vertical direction of the screen 1〇2. The detected coordinate value (X丨, Yl) will be transmitted. Returning to the host 112 for the host U2 to determine the user's choice The function on the screen 102 is to select the function columns of various applications. Therefore, the screen 102 is just like the touch function, directly on the screen 1〇2 8 201015374 * Click to operate various applications. In another implementation For example, if the host 112 is a slot machine, the screen displayed by the screen 102 is a game menu including a plurality of games. When the screen is selected as the input unit 104, the first image is detected. The measuring unit 1〇6 transmits the measured coordinate value (ΧιΥι) to the host U2, and the host computer 12 determines the game selected by the user and executes the game. The first image sensing unit 1〇6 is an external connection. The camera needs to connect the external camera to the host 112 when it is used. After use, the external camera 10 can be removed from the host 112 for rapid removal and installation. The interface between the external camera and the host 112 is connected. The system is selected from any one of the group consisting of a universal serial bus (USB), IEEE 1394, and wireless (Wireless). In the present embodiment, the first image sensing unit 1〇 6. The target identification unit ι〇8 and the unit το 11G are divided into two positions. The 图2 system displays the first image sensing unit 106, the target identification unit 1〇8 and the positioning unit (10) in the third circle. - The schematic diagram of the module, the integration of the above three into one module can increase the mobility of the mainframe system. In another implementation, the image sensing unit (10) is a camera built into the host 112. Or built in the host 112, the resolution requirement does not need to be too high, in general, the resolution of the megapixel can sense the clear picture for the target identification unit 108 and the positioning unit 110 for subsequent processing. The above-mentioned target identification unit can recognize the input unit 104, and the power of the χ 座 coordinate value of the 输入 元 元 G G G 6 6 G6 contact wire 102 can be selected by hard Zhao or software. The first image sensing unit 106 further includes a telescopic device for the user 9 201015374 to adjust the distance between the first image sensing unit i 06 and the screen 丨 02 according to actual needs, so that the positioning unit 110 is in the detecting input unit. The XY coordinate value on the tip of the touch screen of 1〇4 is more accurate. Please refer to Fig. 3, which is a block diagram showing the host system 1〇〇 of the second embodiment of the present invention. The same components as those in FIG. 1 have the same functions and have the same functions, and therefore are not described herein. The difference between the two is that the host system 100' of FIG. 3 further includes a second image sensing unit 116 such as a camera, which is disposed on the screen. One side of the 102 is used to sense the input image of the input unit 1〇4 and the screen 1〇2, that is, the surface of the screen 102 is sensed, and the image 114 touched by the input unit 1 〇 4 and the screen i 〇 2 is transmitted to The host 112 is configured to determine, by the host 112, the contact state of the input unit 104 and the screen 102, such as the contact area size, the contact time, etc. The contact area of the input unit 104 and the screen 1〇2 is taken as an example, when the input unit 1〇4 is used. When the finger is a finger, the host 112 determines that the contact area is a small area representing a state in which the finger performs a tap; conversely, if the host 112 determines that the contact area is a large area, it represents a state in which the finger performs a heavy press. The host 112 can be based on the first image sense. The measuring unit 106 is configured to perform a more accurate determination with the second image sensing unit 116. For example, the host 112 determines the input unit 104 according to the image unit lu that the second image sensing unit 110 returns to the input unit 104 and the screen 1〇2. The screen 102 is in a state of direct contact. On the other hand, the XY coordinate value (X1, Yl) detected by the first image sensing unit 106 represents the moving direction of the input unit 104. The above information can be used to know the input unit ι〇. 4 is always in contact with the screen 102 and moves from one point to another, that is, the input unit ι〇4 is dragged from one point to another to complete the detection of the touch function. In the first embodiment and the second embodiment described above The positioning unit 11 can simultaneously measure the coordinate values of the plurality of input units 104 in contact with the screen 102, and transmit the plurality of coordinate values detected by the 201015374* to the host 112 at the same time. It is equivalent to the multi-touch function of the general capacitive touch panel. Please refer to FIG. 4 , which is a flow chart showing the execution method of the host system with touch function of the present invention, including the following steps: Step S410, a first The image sensing unit senses an image displayed on a screen, wherein the image displayed on the screen is a program stored in the host, such as a desktop application or a game menu of a coin-operated amusement machine;” Step S42〇 In the middle, a target identification unit recognizes an input single element on the screen, and the input unit is used for the user to contact the screen, such as an electromagnetic pen, a finger or a general pen, and the tip thereof is a tip. In step S430, after recognizing the input unit on the screen, a positioning unit detects the χ γ coordinate value when the input unit contacts the screen; and step S44 〇t 'transmits the χ γ coordinate value back to the host for the host According to the coordinate value, it is judged that the input unit touches the function corresponding to the image of the glory screen, such as the application of the desktop computer or the game menu of the coin-operated game machine: the image sensing unit It includes - opposing telescopic passage, for adjusting the distance between the first image sensing Wu and single screen. ', the displayed image is too small or not clear, the distance device of the screen of the glory screen makes the first image sensing unit close to him, & the first image sensing unit senses that the screen is too large to cause _(4) ^ The shadow unit is far from the curtain. The telescopic device causes the second image sensing unit to sense the input unit, and the first image sensing unit, and the second image sensing unit, the sensing input unit, and the image sensing unit The image of the Firefly I is connected to the host, and the image is sent to the host for the host (4) input unit 201015374 and the screen contact state. It causes the host to judge that the contact state of the input unit and the screen includes a contact area or a contact time. Thereby, the host can make a more accurate judgment according to the first image sensing unit and the second image sensing unit. The clamping unit can not only detect the χ coordinate value of the single input unit in contact with the screen, but also detect the χ coordinate value of the multiple input unit and the screen contact, and transmit the detected multiple coordinate values back to the host. The host achieves a multi-touch function equivalent to a general capacitive touch panel. The touch-enabled host system of the present invention can detect the input device to contact the χ 座 coordinate value of the glory screen to enable the general screen in the host system to have a touch function without additionally installing a touch panel, thereby reducing the entire host. The cost of the system, especially when the size of the screen is larger, the prior art must customize the touch panel installation with the same screen size to enable the screen to have a touch function, and the present invention only needs to set the first image sensing unit. The touch screen can be used to cover the entire screen of the honor. Furthermore, the present invention can simultaneously measure the multi-point coordinate value, so that the multi-touch function of the screen is like a touch panel, but the cost is lower than that of the expensive touch panel. When the first image sensing unit, the target identification unit, and the positioning unit © are integrated into the module, the module is connected to the host when needed, and the screen and the touch panel must be installed compared to the prior art. Fixed, the invention is more maneuverable. The invention is in accordance with the requirements of the invention patent, and the patent is filed according to law. The above description is only a preferred embodiment of the present invention, and those skilled in the art are Equivalent modifications or variations made in accordance with the spirit of the invention are intended to be included in the following claims. [Simplified description of the drawing] 12 201015374 ' Fig. 1 is a block diagram showing a host system according to a first embodiment of the present invention; the second drawing shows a first image sensing unit, a target identification unit, and a positioning unit in Fig. 1 FIG. 3 is a block diagram showing a host system according to a second embodiment of the present invention; and FIG. 4 is a flow chart showing a method for executing a host system having a touch function according to the present invention. 〇 [Main component symbol description] 100 ' 1005 host system 102 screen 104 input unit 106 first image sensing unit 108 target identification unit 110 positioning unit 112 host 114 image 116 second image sensing unit S410 ~ S440 step 13