M398155 ,ί 五、新型說明： ί 【新型所屬之技術領域】 一種光學式觸控系統，供以應用於電子裝置所需求 的觸控螢幕上，本創作尤指一種利用 一雷射發光模組產 生光源，並搭配一個以上的感測單元進行感浪】，以達到 簡化觸控模組的結構、以及提升觸控點辨識率的光學式 觸控模組。 $ 【先前技術】 隨著科技的發展’電子資訊產品的輸入裝置，例如 鍵盤、滑鼠等，逐漸與顯示模組進行整合，觸控螢幕（亦 即觸控面板）便因此誕生，由於觸控螢幕可於螢幕上， 直接利用物體或手指進行操作，當使用者觸碰螢幕上的 觸控模組時，觸控螢幕内的觸覺反饋單元可經由預先編 輯的程式，驅動相關聯的物件或程式，更可進一步藉由 螢幕產生生動的效果；觸控模組的作動方式，主要區分 為電阻式、電容式、光學式以及聲波式等，其中，光學 式觸控模組主要係利用光源接收遮斷的原理，當光源遭 遮斷時，經由一感測單元感測光源產生遮斷點的位置， 進而確認觸控點位置，然而，傳統的光學式觸控模組係 在端緣設置有複數個光源模組’且光源模組相對應的端 緣上設置有複數個感測單元’藉由判斷無法偵測到光源 的座標’轉換成觸控點座標，此作法雖可達到觸控的憤 3 M398155 1 = ’但所需使用的光源模組數量依面板尺寸的變大而變 5 多，因此，當其中一感測單元或光源模組失效時，便會 產生誤判，再者，一般傳統的光學觸控模組，係利用發 光二極體等發光元件做為發光源，#面板尺寸較大時， 離光源較遠的區域’因光源的功率減弱，使得感測單元 無法有效的偵測遮斷點，且一般的發光元件係會受到其 他光源的影響’使得觸控點無法精準的判斷，為因應上 述的問題’進而延伸發展出利用導光板，將光源模組所 產生的光源平均分布於觸控感應區域的光學觸控模組， 上述構件雖可減少光源模組的數量以及所需耗費的功率 等，但導光板的組設使原有組裝結構複雜化，且導光板 的平面粗糙以及導光率不佳時，皆會使光源無法均勻分 佈於觸控感應區域内或產生光線散射的情事。 【新型内容】 有鑒於上述的情況，本創作者係依據多年來從事相 關產品設計的經驗，針對光學觸控模組的觸控原理以及 雷射發光模組的特性進行研究及整合，期能設計出符合 需求的結構；緣此，本創作的主要目的在於提供—種利 用雷射發光模組做為光源，以簡化觸控面板所需的組成 構件’且可有效提升觸控點辨識率的光學式觸控系統。 為達上述的目的，本創作所稱的光學式觸控系統， 主要係利用一雷射發光模組產生光源，以形成一面狀的 4 M398155 觸控感應㊣域’並在觸#感應區域的端緣組設有一個以 上的感測單元，藉由感測單元偵測觸控感應區域上的光 遮斷點，進而判斷觸控點的位置，如此便可驅動相關聯 的物件進行作動，再者，本創作主要係利用雷射光的特 性，使光遮斷點可較明確的產生，進而快速且明確的判 斷出觸控點的位置。 以上關於本創作内容之說明及以下之實施方式之說 明’係用以示範與解釋本創作之精神與原理，並且提供 本創作之專利範圍更進一步解釋。 【實施方式】 請參閱「第1圖」，圖中所示係為本創作之構件示意 圖’本創作所稱的光學式觸控系統1 〇，主要係利用一雷 射發光模組101、以及一個以上的感測單元丨02所組構而 成，其中，雷射發光模組1 〇 1係經過光學設計，使雷射 發光模組101經電流導通後，可產生一光平面1 〇 3，藉由 此光平面103形成一面狀的觸控感應區域1〇31，為使雷 射發光模組1 〇 1所產生的光源可以平均的分佈於觸控感 應區域1 〇 31内’組設雷射發光模組1 〇 1時，係可進行適 當角度的調整（如角度A所示），且更可進一步搭配光源 角度較廣（如角度B所示）的雷射發光模組101產生光 源’又，如圖所示’感測單元丨〇2係分別組設於觸控感 應區域1 0 3 1的兩側邊上’用以接收雷射發光模組1 〇 1所 5 M398155 ) 產生的光源，又’上述所稱的雷射發光模組1 〇 1係可進 Ϊ 一步依據實施情況，使其可為一表面黏著型元件的態 樣’或進行微型化的設計，再請參閱「第2圖」，圖中所 示係為本創作之觸控點判斷的實施流程，本創作所稱的 光學式觸控系統10，經電流導通後，各構件開始做動， " 其觸控點判斷如下所述： • (1)光學式觸控系統開始作動21 :經電流導通後， 雷射發光模組101產生一光平面103,且此光平 0 面103形成面狀的觸控感應區域〗〇31; (2)感測早元進行偵測2 2 :承上所述，雷射發光模 組101產生光源後，各感測單元1〇2開始進行光M398155 , ί V. New description: ί [New technical field] An optical touch system for use on touch screens required by electronic devices. This creation especially refers to the use of a laser light-emitting module. The light source is combined with more than one sensing unit for sensing, so as to achieve an optical touch module that simplifies the structure of the touch module and improves the recognition rate of the touch point. $ [Prior Art] With the development of technology, the input devices of electronic information products, such as keyboards and mice, are gradually integrated with the display module, and the touch screen (also known as the touch panel) is born. The screen can be directly operated by an object or a finger on the screen. When the user touches the touch module on the screen, the tactile feedback unit in the touch screen can drive the associated object or program via a pre-edited program. The screen can be further divided into a resistive type, a capacitive type, an optical type, and an acoustic wave type. The optical touch module mainly uses a light source to receive the light. The principle of breaking, when the light source is blocked, the position of the blocking point is generated by sensing the light source through a sensing unit, thereby confirming the position of the touch point. However, the conventional optical touch module is provided with a plurality of edges at the edge. The light source module 'and the corresponding edge of the light source module is provided with a plurality of sensing units 'by determining that the coordinates of the light source cannot be detected' is converted into a touch point seat Mark, this method can achieve the touch of anger 3 M398155 1 = 'But the number of light source modules to be used varies by the size of the panel, so when one of the sensing units or the light source module fails In addition, the conventional optical touch module uses a light-emitting element such as a light-emitting diode as a light-emitting source. When the size of the panel is large, the area farther from the light source is due to the power of the light source. The weakening makes the sensing unit unable to effectively detect the blocking point, and the general light-emitting component is affected by other light sources, so that the touch point cannot be accurately judged, and the light guide plate is further developed in response to the above problem. The light source generated by the light source module is evenly distributed on the optical touch module of the touch sensing area. Although the above components can reduce the number of light source modules and the power required, the light guide plate is assembled. When the assembly structure is complicated, and the plane of the light guide plate is rough and the light guiding rate is not good, the light source cannot be uniformly distributed in the touch sensing area or the light is scattered. [New content] In view of the above situation, the creator is based on years of experience in related product design, researching and integrating the touch principle of optical touch modules and the characteristics of laser light-emitting modules. Therefore, the main purpose of this creation is to provide an optical device that uses a laser-emitting module as a light source to simplify the components required for the touch panel and can effectively improve the recognition rate of the touch point. Touch system. In order to achieve the above objectives, the optical touch system referred to in the present invention mainly uses a laser light emitting module to generate a light source to form a side-shaped 4 M398155 touch sensing positive domain and is in the end of the touch sensing region. The edge group has more than one sensing unit, and the sensing unit detects the light blocking point on the touch sensing area, thereby determining the position of the touch point, so that the associated object can be driven to operate, and This creation mainly uses the characteristics of laser light to make the light interception point clearer, and then quickly and clearly determine the position of the touch point. The above description of the present invention and the following description of the embodiments are intended to demonstrate and explain the spirit and principles of the present invention, and to provide further explanation of the scope of the patent. [Embodiment] Please refer to "Figure 1", which is a schematic diagram of the components of the creation. The optical touch system 1 本 in this creation mainly uses a laser light-emitting module 101 and a The above-mentioned sensing unit 丨02 is configured, wherein the laser illuminating module 1 〇1 is optically designed, so that after the current is turned on, the laser illuminating module 101 can generate a light plane 1 〇 3, The light-emitting plane 103 forms a one-side touch sensing area 1〇31, so that the light source generated by the laser light-emitting module 1 〇1 can be evenly distributed in the touch-sensitive sensing area 1 〇31. When the module 1 〇1, the appropriate angle adjustment (as shown by the angle A) can be performed, and the laser light source module 101 having a wider light source angle (as shown by the angle B) can be further used to generate the light source. As shown in the figure, the sensing unit 丨〇2 is respectively disposed on the two sides of the touch sensing area 1 0 3 1 to receive the light source generated by the laser light emitting module 1 〇1 5 M398155, and 'The above-mentioned laser light-emitting module 1 〇1 can be implemented step by step. In this case, it can be a surface-adhesive component's design or miniaturized design. Please refer to "Figure 2". The figure shows the implementation process of the touch point judgment of the creation. The so-called optical touch system 10, after the current is turned on, the components start to move, " the touch point judgment is as follows: • (1) The optical touch system starts to operate 21: After the current is turned on, The laser light emitting module 101 generates a light plane 103, and the light flat surface 103 forms a planar touch sensing area 〇 31; (2) sensing the early element for detecting 2 2: as described above, the laser After the light emitting module 101 generates the light source, each sensing unit 1〇2 starts to light.
IW 遮斷點的偵測； (3 )產生光遮斷點2 3 :常態下，感測單元1 〇 2持續 偵測雷射發光模組1 〇 1所產生的光源，當使用者 使用物件或手指碰觸觸控模組丨〇時，使觸控感 0 應區域1031上產生一光遮斷點，使感測單元i〇2 ：， 因光源的變化’偵測到一光遮斷點； - (4)產生觸控點座標資料2 4 :承上所述，感測單元 10 2感測到光遮斷點後’經運算推導，可產生— 觸控點座標資料，進而驅動相關的物件進行作 動0 為使上述觸控點的判斷更為精確，本創作係可進一 - 步搭配一個以上的雷射發光模組產生光源，請參閱「第3 6 M398155 圖」’圖令所示係為本創作的另一實施例（一），如圖所 示，本創作所稱光學式觸控系統30係利用兩組雷射發光 模組（3 01 ’ 3 01 )產生光源’其中’第一雷射發光模組 301與第二雷射發光模組301’組設時，為避免兩雷射發 光模組（301 ’ 301’ ）所產生的光源相互干擾，因此組設 時兩雷射發光模組（3 01，3 01 ’）所組設的高度需呈高低 差’進而使兩光源產生錯位’又，各感測單元（3〇2、 302’ 、302”）亦隨著所對應的雷射發光模組（3〇1，3〇1，） 調整組設的高度以及組設的位置，以偵測各雷射光源模 組（301 ’ 301 )所產生的光源，其實施過程係如「第2 圖」所述，在此不於贅述，當使用者利用物件或手指碰 觸兩光平面交疊產生的觸控感應區域303時，便會在兩 光平面上分別形成一光遮斷點，如此，便可藉由兩光遮 斷點更精確的判斷出觸控點的所在位置，進而驅動相關 的物件或程式；再請參閱「第4圖」，圖中所示係為本創 作的另一實施例（二），如圖所示，本創作係可進一步組 設有多組的雷射發光模組301，且於各雷射發光模組3〇1 所相對應的端緣組設有一感測元件3〇2，藉此使觸控點辨 識率提高，其中，雷射發光模組3〇1所組設的位置如圖 中所示的al、a2、a3，然而感測單元302組設位置係如 圖中所示的bl、b2、b3、b4。 請參閱「第5圖」’圖中所示係為本創作的另—實施 例（三），如圖所示，本創作所稱的光學式觸控系統4〇主 7 M398155 要係由一雷射發光模組401以及一感測單元4〇2所組構 而成，其中，雷射發光模組401係為可產生光平面的雷 射二極體所製成，且雷射發光模組4 〇 1的組設跟隨著面 板的尺寸，進行適當角度的調整，又，感測單元402係 組設於與雷射發光模組4 01相呼應的對角上，且感測單 元402組設有一透鏡4021，透鏡4021係可使原本收光角 度車父小的感測單元4 0 2能夠接收到較大角度範圍的光 源’其係可緊貼於感測元件402的收光面組設，或與感 測元件4 0 2呈相間隔組設’又，本創作所稱的光學式觸 控系統40，其實施方式係如「第2圖」所述，在此不於 贅述’又，為使觸控點的判斷更為精準，本創作係可組 設一個以上的雷射發光模組401以及感測單元402進行 感測，並不以上述構件所限制，請參閱「第6圖」，圖中 所示係為本創作的另一實施例（四），如圖所示，光學式 觸控系統40係由兩組雷射發光模組（4〇 1、4〇 1，）以及兩 感測早元（4 0 2、4 0 2 )所組構而成，且兩感測單元（4 0 2 ' 402’ ）係分別組設於所對應的雷射發光模組（4〇1、4〇1，） 的對角上’以偵測所對應的雷射發光模組（4〇1、4〇1’ ） 所產生的光源’又，兩雷射發光模組（4〇1、401，）為避 免光源相互干擾，其組設方式係如「第3圖」所述，在 此不於贅述；再請參閱「第7圖」，圖中所示係為本創作 之另一實施例（五），本創作係可進一步將雷射發光模組 401及感測單元402同時組設於觸控感應區域403其中一 8 M398155 端點’並於相對的另一端點組設有另一雷射發光模組 401及感測單元402’ ，其實施時，係可透過感測單元 (402或402 )直接感測因觸控所產生的光遮斷點，而雷 射發光模組4 01所產生的光源，係可由組設於同一端點 的感測單元402或組設於另一端點的感測單元4〇2，，進 行光遮斷點的感測，又，為避免兩雷射發光模組㈠〇1、 4〇1 )所產生的光源相互干涉，係可利用「第3圖」所 述的方式進行組設，而感測單元（4〇2、4〇2，）所組設的 位置係對應於所感測的雷射發光模組（4〇丨、4〇丨，）；另， 上述結構係可進一步搭配一影像識別系統，以更精確的 判斷光遮點的位置。 呈上述’本創作除可利用上述構件達成本創作欲達 成的目的，更可進一步搭配一反射件實施，請參閱「第8 圖」，圖中所示係為本創作之另一實施例（六），如圖所 示雷射發光模組4 01及感測單元4 〇 2係相對組設於觸 控感應區域403的其中一側，而所相對應的另一側係組 设有一反射件405，此反射件405可進一步藉由光學設 计，使其可將光源反射至所指定的方向，如此，雷射發 光杈組401所產生的雷射光，藉由反射件4〇5的反射， 可供感測單元402進行感測，以達到判斷光遮斷點，進 而產生觸控點的功用，又，上述所稱的反射件405，係可 ’、且於觸控感應區域4〇3的其中一側邊，或數個反射件 405分別組設於觸控感應區域403的其中一側邊，而本創 9 M398155 作所繪示之「第8圖」，僅為舉例，並不以限制反射件4〇5 所組設的數量及位置；又，本創作係可進一步將反射件 405運用於「第7圖」所揭露的結構之令，請參閱「第9 圖」，圖中所示係為本創作之另一實施例（七），藉由反射 件405的反射，使感測單元402,可感測組設於相對端點 的雷射發光模組401所產生的光源。IW interception point detection; (3) generating light interception point 2 3 : Normally, the sensing unit 1 〇 2 continuously detects the light source generated by the laser light emitting module 1 ,1, when the user uses the object or When the finger touches the touch module ,, a light occlusion point is generated on the touch sensing area 10, so that the sensing unit i 〇 2: detects a light occlusion point due to the change of the light source; - (4) Generate touch point coordinate data 2 4: According to the above, after the sensing unit 10 2 senses the light interception point, the operation derivative can generate the touch point coordinate data, thereby driving the related object. Actuation 0 In order to make the above-mentioned touch point judgment more accurate, the author can use one or more laser light-emitting modules to generate the light source one by one. Please refer to the "3 6 M398155 figure" Another embodiment of the present invention (1), as shown in the figure, is referred to in the present invention as an optical touch system 30 that uses two sets of laser light emitting modules (3 01 ' 3 01 ) to generate a light source 'where the first mine When the illuminating module 301 and the second laser illuminating module 301 ′ are assembled, in order to avoid two laser illuminating modules (301 ' 301 The generated light sources interfere with each other. Therefore, the heights of the two laser light-emitting modules (3 01, 3 01 ') must be set to be high and low, so that the two light sources are misaligned, and each sensing unit ( 3〇2, 302', 302”) also adjusts the height of the set and the position of the set with the corresponding laser light-emitting module (3〇1, 3〇1) to detect each laser light source mode. The light source generated by the group (301 '301) is implemented as described in "Fig. 2", and is not described here. When the user touches the two light planes by using the object or the finger, the touch sensing area is generated. At 303, a light-blocking point is formed on each of the two light planes, so that the position of the touch point can be more accurately determined by the two light-blocking points, thereby driving the related object or program; Please refer to "Fig. 4", which is another embodiment (2) of the present creation. As shown in the figure, the creation system may further be provided with a plurality of sets of laser light-emitting modules 301, and Each of the end edge groups of the respective laser emitting modules 3〇1 is provided with a sensing element 3〇2, thereby making the touch The point recognition rate is increased, wherein the position of the laser light emitting module 3〇1 is set as al, a2, a3 as shown in the figure, but the position of the sensing unit 302 is set as bl, b2 as shown in the figure. , b3, b4. Please refer to "Fig. 5". The figure shown in the figure is another example (3) of this creation. As shown in the figure, the optical touch system referred to in this creation is the main 7 M398155. The light-emitting module 401 and the sensing unit 4〇2 are configured, wherein the laser light-emitting module 401 is made of a laser diode capable of generating a light plane, and the laser light-emitting module 4 is The set of the 〇1 is adjusted according to the size of the panel, and the appropriate angle is adjusted. Further, the sensing unit 402 is disposed on a diagonal corresponding to the laser light emitting module 401, and the sensing unit 402 is provided with a set. The lens 4021, the lens 4021 is configured to enable the sensing unit 410 that is smaller than the original light-receiving angle to receive a light source of a larger angular range, which can be closely attached to the light-receiving surface of the sensing element 402, or And the sensing element 420 is spaced apart from each other. In addition, the optical touch system 40 referred to in the present invention is described in the "2nd drawing", and is not described herein again. The determination of the touch point is more precise, and the creation system can set more than one laser light emitting module 401 and the sensing unit 402. The measurement is not limited by the above components. Please refer to "Figure 6", which is another embodiment (4) of the creation. As shown in the figure, the optical touch system 40 is composed of two groups. The laser light-emitting module (4〇1, 4〇1,) and the two sensing early elements (4 0 2, 4 0 2 ) are combined, and the two sensing units (4 0 2 '402') are They are respectively arranged on the diagonal of the corresponding laser light-emitting modules (4〇1, 4〇1,) to detect the corresponding laser light-emitting modules (4〇1, 4〇1'). The light source 'again, the two laser light-emitting modules (4〇1, 401,)) are arranged to avoid mutual interference of the light sources, and the method of setting them is as described in “Fig. 3”, and will not be described here; 7 is a diagram of another embodiment (5) of the present invention. The creation of the laser light emitting module 401 and the sensing unit 402 can be further integrated into the touch sensing area 403. The M398155 endpoints are provided with another laser light emitting module 401 and a sensing unit 402' in the opposite end group, which can be directly sensed through the sensing unit (402 or 402). The light-blocking point generated by the touch, and the light source generated by the laser-emitting module 410 may be the sensing unit 402 disposed at the same end point or the sensing unit 4〇2 disposed at the other end point. , in order to sense the light interception point, and to avoid interference between the light sources generated by the two laser light-emitting modules (1) 〇1, 4〇1), the group can be grouped by the method described in "Fig. 3". The position of the sensing unit (4〇2, 4〇2,) is corresponding to the sensed laser light emitting module (4〇丨, 4〇丨,); With an image recognition system to more accurately determine the position of the light block. In the above-mentioned 'this creation can be achieved with the above-mentioned components to achieve the purpose of this creation, and can be further combined with a reflector implementation, please refer to "8th figure", which is shown as another embodiment of the creation (six As shown in the figure, the laser module 4 01 and the sensing unit 4 〇 2 are oppositely disposed on one side of the touch sensing area 403, and the corresponding other side group is provided with a reflecting member 405. The reflector 405 can be further optically designed to reflect the light source to a specified direction. Thus, the laser light generated by the laser group 401 can be reflected by the reflector 4〇5. The sensing unit 402 performs sensing to determine the light blocking point, thereby generating the function of the touch point. Further, the so-called reflector 405 can be used in the touch sensing area 4〇3. One side, or a plurality of reflecting members 405 are respectively disposed on one side of the touch sensing area 403, and the "8th drawing" shown in the original 9 M398155 is only an example and does not limit reflection. The number and location of the 4〇5 set; in addition, the creative department can further For the structure of the structure disclosed in FIG. 7 , please refer to FIG. 9 , which is another embodiment (7) of the present invention, by reflection of the reflector 405, The sensing unit 402 is configured to sense a light source generated by the laser light emitting module 401 disposed at the opposite end point.
綜上所述，本創作所稱的光學式觸控系統，主要係 利用雷射發光模組產生光源，藉由雷射光的干涉性以及 低散射性’使感測單元可明確的判斷出光遮斷點的位 置’且運用可產生—光平面的雷射發光模組，以減少所 需要的發光模組數量；據此，本創作其據以實施後，確 實可達到提供-種利用雷射發光模組產生光源，以提升 觸控點的辨識率的光學式觸控模組。In summary, the optical touch system referred to in this creation mainly uses a laser light emitting module to generate a light source, and the sensing unit can clearly determine the light interruption by the interference of the laser light and the low scattering property. The position of the point 'and the laser light emitting module that can generate the light plane to reduce the number of light-emitting modules required; accordingly, according to the implementation of the present invention, it is indeed possible to provide a laser light-emitting mode. An optical touch module that generates a light source to enhance the recognition rate of the touch point.
唯，以上所述者，僅為本創作之較佳之實施例而已， 並非用以限定本創作實施之職，任何熟習此技蔽者， 在不脫離本創作之精神與㈣下所作之均等變化與修 飾，皆應涵蓋於本創作之專利範圍内。 綜上所述 「實用性」、「 之規定，向 本創作之功政，係符合申請專利要件之 新賴性」與「進步性」；申請人爰依專利法 鈞局提起新型專利之申請。 M398155 【圖式簡單說明】 第1圖，為本創作之構件示意圖。 第2圖，為本創作之觸控點判斷的實施流程。 第3圖，為本創作的另一實施例（一）。 第4圖，為本創作的另一實施例（二）。 第5圖，為本創作的另一實施例（三）。 第6圖，為本創作的另一實施例（四）。 第7圖，為本創作之另一實施例（五）。The above descriptions are only for the preferred embodiments of the present invention and are not intended to limit the implementation of the present invention. Anyone who is familiar with the skill of the present invention, without departing from the spirit of the creation and (4) Modifications should be covered by the scope of this creation. In summary, the "practicality" and "regulations, the merits of this creation are in line with the new reliance on the application of patent requirements" and "progressiveness"; the applicant filed a new patent application in accordance with the Patent Law Bureau. M398155 [Simple description of the diagram] Figure 1 is a schematic diagram of the components of the creation. Figure 2 is the implementation flow of the touch point judgment of the creation. Fig. 3 is another embodiment (1) of the present creation. Figure 4 is another embodiment (2) of the present creation. Figure 5 is another embodiment (3) of the present creation. Figure 6 is another embodiment (4) of the present creation. Figure 7 is another embodiment (5) of the present creation.
第8圖，為本創作之另一實施例（六）。 第9圖，為本創作之另一實施例（七）。 【主要元件符號說明】 10 光學式觸控系統 101 雷射發光模組 102 感測單元 103 光平面 1031 觸控感應區域 21 光學式觸控系統開始做動 22 感測單元進行偵測 23 產生光遮斷點 24 產生觸控點座標資料 30 光學式觸控系統 11 M398155 301 第一雷射發光模組 301’ 第二雷射發光模組 302 感測單元 302’ 感測單元 302” 感測單元 303 觸控感應區域 - 40 光學式觸控系統 401 雷射發光模組 402 感測單元 • 401’ 雷射發光模組 402’ 感測單元 403 觸控感應區域 4021 透鏡 J 405 反射件 Λ A 角度 B 角度 al 位置 bl 位置 a2 位置 b2 位置 • a3 位置 b3 位置 b4 位置 12Figure 8 is another embodiment (6) of the present creation. Figure 9 is another embodiment (7) of the present creation. [Major component symbol description] 10 Optical touch system 101 Laser light emitting module 102 Sensing unit 103 Light plane 1031 Touch sensing area 21 Optical touch system starts to operate 22 Sensing unit detects 23 Generates light shielding Breakpoint 24 generates touch point coordinate data 30 Optical touch system 11 M398155 301 First laser light emitting module 301' Second laser light emitting module 302 Sensing unit 302' Sensing unit 302" Sensing unit 303 Touch Controlled sensing area - 40 optical touch system 401 laser light emitting module 402 sensing unit • 401' laser light emitting module 402' sensing unit 403 touch sensing area 4021 lens J 405 reflector Λ A angle B angle a Position bl position a2 position b2 position • a3 position b3 position b4 position 12