201122965 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種觸控面板，特別是關於一種光學觸控系統。 【先前技術】 目前的觸控面板技術中，有接觸式的電阻式與電容式觸控面板，也有 非接觸式的光學式、超音波式、投影式、電磁式與内嵌式等。其中，又以 光學式觸控面板可運用在大尺寸液晶顯視器上，而引起眾人的矚目，其具 籲有不需增設觸控面板層’而可直接於屬於平面型驗晶顯視器上裝設而成 的特色，並且，其具有可進行多點觸碰偵測的效果。 -般的光學式觸控面板’ A都縣紅外線作為發絲。因紅外線不為 人所視’而不會影響液晶顯視器的顯示光源。在結構上，有採取角落兩個 影賴取模組’並於面板的周邊裝置多個紅外線發光源的方式。不過，此 種方式會產生兩個影像操取單元本身的角落死角問題。亦即，當物件觸碰 到非常接近角落的兩個影像榻取模組其中之一時，由於只有一個影像榻取 修模組擷取到影像’因此，無法採取交叉式的計算而獲得座標，而形成，，死角” 〇 乍法為國内廠商所提出的架構，其在兩個角落影像榻取模組中 間增加至y -個影像棘模組，如此，增加可觸的鋪，以防止誤判。 過此種作法仍然無法解決角落影像摘取模組本身的死角問題。 第-種作法為國外廠商所提出的架構’其在四個祕個裝置—個影像 4取模.且此種作法無死角的問題，不過，其成本較兩個或三個影像擷取 模组為高。 乂上的光痛碰系統，都必須面臨另外—個問題，使用者仍然會”接觸， 201122965 液晶顯視器。亦即’使用者仍會希望有觸碰的感覺，並且，會進行實際的 觸碰。光學觸碰系統的不須觸碰即可偵測的優點，在使用者須要進行觸碰 的要求下，反而變成缺點。於是，如何同時以低成本解決死角的問題，以 及’同時可滿足絲用者綱的目的，則可讓光學觸碰系統顧到更多液 晶顯視器產品。 【發明内容】 鑑於以上習知麟的問題，本發明提出_種光學觸控系統 ，用於偵測 至少-個觸碰物觸碰-面板之至少—觸碰座標，包含：至少—發光單元， 叹置於面板’用以發射-光線以分佈於面板上；至少三個影賴取單元， 分別没置機面板之另三個㈣’用喃取影像；及處理單元，連接發光 單7C，連接並接㈣賴取單搞傳送之雜，並依刺碰物麟光線所 形成之影像計算觸碰座標。 本發明更提出_種光學繼彡統，麟個至少-侧碰物觸碰一面 板之至少-觸碰座標’包含：第—發光單元，設置於面板，贱發射一光 線以分佈於面板上；第-、第二影像娜單元，分別設置於面板兩角落， 用以摘取総所形狀影像；至少—第三影像練單元，設置於面板之至 夕-邊’用靖取影像；及處理單元，連接第__發光單元，連接並接收第 '第-、第二影賴取單元所傳送之鱗，並依刺碰物遮斷光線所形 成之影像計算觸碰座標。 以下在實施方式中詳細敘述本發明之詳細特徵以及優點，其内容足以 使任何熟習相關技藝者瞭解本發明之技術内容並據以實施，域據本說明 書所揭露之内容、中請專利侧及圖式，任何熟習相關技藝者可輕易地理 201122965 解本發明相關之目的及優點。 【實施方式】 首先，請參考第1圖，其為本發明之光學觸控系統彳第一實施 例，其可侧面板之至少一個觸碰物，例如，圖中的液晶面板12。光學 觸控系統1包含有：發光單元28、影像擷取單元22、影像擷取單 元24、影像擷取單元26,與一處理單元（未畫出）。 各元件的連結關係說明如下。發光單元28，設置於液晶面板12 籲之角落，連接處理單元’其在第1圖中為外罩1〇的右下角，用以發射佈於 液晶面板12上之光線。影像擷取單元22、24、26連接處理單元分別設 置於液晶面板12之另三個角落，用以擷取發光單元28所發送之光線所形 成之影像。處理單元用以控制發光單元28之發光，並接收影像擷取單元 22、24、26所傳送之影像，並依據觸碰物遮斷光線所形成之影像計算觸碰 物之座標。 如第1圖所示者，當兩手指觸碰到液晶面板12的觸碰點丁1、T2時， ® 影像操取單元22、24、26分別娜到不同角度的觸碰點T1、T2資訊。當 送至處理單元時，處理單元即可據以計算出真實的觸碰點資訊。由於計算 方式為簡易的數學計算，本發明不多贅述。重點在於，當觸碰點位於影像 _取單元22、24、26其中任何-個角落時，另外兩個影像摘取單元仍^ 看到影像，進而可計算得到準確的座標，避免了習知技術的，，死角，，問題。 其中，發光單元28係為一紅外線發射器，或者為一廣角型紅外線發 射器。而影像梅取單元22、24、26係為紅外線攝職。 導光板，設置於該面板上，用以平均分佈該發光單元所發射之該光線。 201122965 請參考第2圖，其為第1圖沿a—A轴線之剖面圖，其說明了 發光單元28發射光線，進而由影像擷取單元24接收到的情形。 當物件進入發光單元28的光線發射範圍内，也就是液晶面板12 由外罩1〇所包圍的空間，就會發生光線遮斷。藉由此光線遮斷的 兩個以上的影像，處理單元即可計算交叉計算出物件觸碰的座 標。理所當然地，可輕易地計算出多點觸碰的座標。 運用三個角落的影像擷取單元，另可*避免掉兩個影像擷取單 元的鬼影問題。 除了將三個影像擷取單元設置於三個角落的方式，亦可採取 將兩個設置相鄰兩個角落，另一個設置於對邊的方式。 請參考第3A圖’其為本發明之光學觸控系統1第二實施例中第 一例。光學觸控系統彳包含有：發光單元28、發光單元30、影像 擷取單元22、影像擷取單元24、影像擷取單元26，與一處理單 元（未晝出〉。 影像操取單元22、24、26連接處理單元，分別設置於液晶面板12之 另兩個角落，在第3圖中係為左上角與右上角，用以擷取發光單元28、30 所發送之光線所形成之影像^處理單元用以控制發光單元28、3〇之發光， 並接收影像触單it 22、24、26所攸之雖，魏細碰物賴光線所 形成之影像計算觸碰物之座標。 設置於對邊的影像操取單元26，可設置於中央，亦可設置於中央偏左 或中央偏右，或靠近角落，或左右兩個鄰邊的其中—處皆可。而三個影像 201122965 擷取單元的設計’同樣可達到前述的防止死角與鬼影的效果。而兩個發光 單元28、30的設計，若發光單元的發光效率很好，亦可採取一個即可。 請參考第3Β圖，其為本發明之光學觸控系統彳第二實施例中第 二例，其為將兩個影像擷取單元22、24設置於兩對角，而另一個 影像擷取單元26設置於底邊的實施例。亦即，除了第3Α圖的相 鄰兩邊的設置外，亦可採取對角與其中一邊的一處的設計。 除了對邊或者鄰邊的一個影像擷取單元的設置外，亦可設置 多個鄰邊或對邊的影像擷取單元。請參考第3^圖，其為本發明之 光學觸控祕1第二實施射第三例，其為將兩個影像擷取單元 22、24設置於兩對角，而另兩個影像擷取單元％、32設置於底 邊的實施例。 本發明更提供-射增加繼問題的枝―在硫上增加一導光 板。增加導絲有幾個效果，-、提高發光單元的光線分佈均勻度；二、 保護液晶面板。 請參考第4圖，其為本發明之光學觸控系統第三實施例，其為 運用導光板40(例如’可制導光_)的第—實⑽。比較第， 圖與第4圖可發現’其差異點在於第4圖增加了導光板•其餘 白相同其差異性再睛參考第5圖，第4圖沿Α_Α軸線之剖面 圖。由第5圖可觀察到’發光單元28所發射的光線，會經由導光 進行導光^•無物件接觸時，光線將會均自分佈於導光板 4〇。若有物件接_，因為物件與導光板40的折射率額於空氣 201122965 與導光板40的折射率，將會使光線的走向發生變化，影像擷取單 元24可截取到此變化。 同樣地，第3圖的實施例亦可採用導光板40的增設設計，請 參考第6圖，其為本發明之光學觸控系統第四實施例，增設導光 板40的設計。其與第3圖的差異僅在於導光板40的增設’餘者 相同，不再贅述。 實作上’三個影像擷取單元的設置，另可設置的位置有：兩 個對角與一周邊’或者，相鄰兩角落與其鄰邊。以第1圖的實施 例來說，將影像擷取單元24的位置設置於外罩的上邊、下邊、 左邊或者右邊均可。以第3圖的實施例來說，將影像擷取單元26 置於外罩1〇的左邊或右邊而非下邊，亦可達到相同效果。不 過，相應地，不同的設置位置，處理單元必須將設置的角度列入 計算座標的參數值，計算上較為複雜。 此外，導光板的設置，可採用單片或者多片的設計。 雖然本發_技術内容已經以較佳實施例揭露如上，然其並非用以限 定本發明，任何熟習此技藝者，在不脫離本發明之精神所作些許之更動與 潤飾’皆應涵蓋於本發明的範嘴内，因此本發明之保魏圍當視後附之申 請專利範圍所界定者為準。 【圖式簡單說明】 第1圖係為本發明之光學觸控系統第一實施例； 第2圖係為第1圖沿A—A轴線之剖面圖； 第3A圖係為本發明之光學觸控系統第二實施例中第一例； 201122965 第3B圖係為本發明之光學觸控系統第二實施例中第二例； 第3C圖係為本發明之光學觸控系統第二實施例中第三例； 第4圖係為本發明之光學觸控系統第三實施例； 第5圖係為第4圖沿A—A軸線之剖面圖；及 第6圖係為本發明之光學觸控系統第四實施例。 【主要元件符號說明】201122965 VI. Description of the Invention: [Technical Field] The present invention relates to a touch panel, and more particularly to an optical touch system. [Prior Art] In the current touch panel technology, there are contact type resistive and capacitive touch panels, as well as non-contact optical, ultrasonic, projection, electromagnetic and in-line types. Among them, the optical touch panel can be applied to a large-size liquid crystal display device, which attracts everyone's attention, and it has a need to add a touch panel layer, and can directly belong to a planar crystal inspection device. The features are mounted on the top, and it has the effect of multi-touch detection. - The general optical touch panel 'A Du County infrared rays as a hair. Since the infrared rays are not viewed by humans, they do not affect the display light source of the liquid crystal display. In terms of structure, there are two ways of taking a plurality of infrared light sources from the corners of the panel. However, this method creates a corner deadband problem for the two image manipulation units themselves. That is, when an object touches one of the two image-taking modules that are very close to the corner, since only one image-recovery module captures the image, the coordinates cannot be obtained by cross-calculation. The formation, the dead angle" is a structure proposed by domestic manufacturers. It is added to the y-image ratchet module in the middle of the two corner image capture module. Thus, the touchable shop is added to prevent misjudgment. This method still can not solve the problem of the dead angle of the corner image extraction module itself. The first method is the architecture proposed by foreign manufacturers, which is in the four secret devices - image 4 is taken. The problem of dead angle, however, is higher than two or three image capture modules. The light-touch system on the raft must face another problem, the user will still "contact, 201122965 LCD monitor . That is, the user still wants to feel touched, and the actual touch is made. The advantage of the optical touch system that can be detected without touching the touch becomes a disadvantage when the user needs to make a touch. Therefore, how to solve the problem of dead angles at a low cost at the same time, and at the same time satisfying the purpose of the wire user, allows the optical touch system to take care of more liquid crystal display products. SUMMARY OF THE INVENTION In view of the above problems, the present invention provides an optical touch system for detecting at least one touch object-at least-touch coordinates of a touch panel, including: at least - a light unit, an sigh The panel is used to emit light-distributed on the panel; at least three of the units are taken, and the other three (four) of the panel are not used to capture the image; and the processing unit is connected to the light-emitting unit 7C, and connected and connected (4) Relying on the single transmission, and calculating the touch coordinates according to the image formed by the light of the thorn. The invention further proposes that the at least one-touch object touches a panel at least the touch coordinate includes: a first light-emitting unit disposed on the panel, wherein a light is emitted to be distributed on the panel; The first and second image unit are respectively disposed at two corners of the panel for extracting the image of the shape of the frame; at least the third image training unit is disposed at the side of the panel to capture the image; and the processing unit And connecting the __ illuminating unit, connecting and receiving the scale transmitted by the first and second shadow absorbing units, and calculating the touch coordinates according to the image formed by the puncturing object intercepting the light. The detailed features and advantages of the present invention are described in detail below in the embodiments, which are sufficient to enable the skilled person to understand the technical contents of the present invention and to implement the present invention. Anyone skilled in the art can easily geotide 201122965 to address the objects and advantages associated with the present invention. [Embodiment] First, please refer to Fig. 1, which is a first embodiment of the optical touch system of the present invention, which can be at least one touch of a side panel, for example, the liquid crystal panel 12 in the figure. The optical touch system 1 includes a light emitting unit 28, an image capturing unit 22, an image capturing unit 24, an image capturing unit 26, and a processing unit (not shown). The connection relationship of each component is explained below. The light-emitting unit 28 is disposed at a corner of the liquid crystal panel 12, and is connected to the processing unit', which is the lower right corner of the cover 1 in FIG. 1 for emitting light on the liquid crystal panel 12. The image capturing units 22, 24, and 26 are respectively disposed in the other three corners of the liquid crystal panel 12 for capturing images formed by the light emitted by the light emitting unit 28. The processing unit is configured to control the illumination of the illumination unit 28, and receive the image transmitted by the image capture unit 22, 24, 26, and calculate the coordinates of the touch object according to the image formed by the touch object intercepting the light. As shown in Fig. 1, when two fingers touch the touch points D1 and T2 of the liquid crystal panel 12, the image capturing units 22, 24, and 26 respectively reach the touch points T1 and T2 of different angles. . When sent to the processing unit, the processing unit can calculate the actual touch point information. Since the calculation method is a simple mathematical calculation, the present invention will not be repeated. The important point is that when the touch point is located in any of the corners of the image capture unit 22, 24, 26, the other two image capture units still see the image, and the accurate coordinates can be calculated, avoiding the prior art. ,, dead ends, problems. The light-emitting unit 28 is an infrared emitter or a wide-angle infrared emitter. The image capture unit 22, 24, 26 is an infrared camera. a light guide plate is disposed on the panel for evenly distributing the light emitted by the light emitting unit. 201122965 Please refer to Fig. 2, which is a cross-sectional view along line a-A of Fig. 1, which illustrates the case where the light-emitting unit 28 emits light and is received by the image capturing unit 24. When the object enters the light emission range of the light-emitting unit 28, that is, the space surrounded by the outer cover 1 of the liquid crystal panel 12, light breakage occurs. With more than two images intercepted by the light, the processing unit can calculate the coordinates of the intersection of the objects. Of course, the coordinates of the multi-touch can be easily calculated. Use the image capture unit in three corners, and avoid the ghosting problem of the two image capture units. In addition to the way in which three image capturing units are placed in three corners, it is also possible to set two adjacent corners and the other to the opposite side. Please refer to FIG. 3A, which is a first example of the second embodiment of the optical touch system 1 of the present invention. The optical touch system includes: a light emitting unit 28, a light emitting unit 30, an image capturing unit 22, an image capturing unit 24, an image capturing unit 26, and a processing unit (not shown). The image capturing unit 22, 24, 26 connection processing units, respectively disposed in the other two corners of the liquid crystal panel 12, in the third figure is the upper left corner and the upper right corner, for capturing the image formed by the light emitted by the light-emitting units 28, 30 ^ The processing unit is configured to control the illumination of the light-emitting units 28 and 3, and receive the coordinates of the image touch-tabs it 22, 24, and 26, and calculate the coordinates of the touch object by the image formed by the light-sensitive object. The image capturing unit 26 on the side may be disposed at the center, or may be disposed at the center to the left or the center to the right, or to the corner, or to the left and right sides of the two sides. The three images 201122965 capture unit The design 'can also achieve the above-mentioned effect of preventing dead angles and ghosting. The design of the two light-emitting units 28, 30, if the luminous efficiency of the light-emitting unit is good, one can be taken. Please refer to the third figure, Optical touch of the present invention The control system is a second example in the second embodiment, which is an embodiment in which two image capturing units 22, 24 are disposed at two opposite corners, and another image capturing unit 26 is disposed at the bottom edge. In addition to the arrangement of the adjacent two sides of the third figure, a design of the diagonal and one of the sides may be adopted. In addition to the setting of one image capturing unit of the side or the adjacent side, a plurality of adjacent sides or pairs may be provided. The image capturing unit of the side, please refer to FIG. 3, which is a third example of the second embodiment of the optical touch function 1 of the present invention, which is to set the two image capturing units 22 and 24 at two diagonals. The other two image capturing units %, 32 are disposed on the bottom side of the embodiment. The invention further provides a branch that increases the problem after the injection - adding a light guide plate to the sulfur. The guide wire has several effects, - The light distribution uniformity of the light-emitting unit; Second, the protection of the liquid crystal panel. Please refer to FIG. 4, which is a third embodiment of the optical touch system of the present invention, which is the use of the light guide plate 40 (for example, 'guide light _) - Real (10). Comparing the figure, Figure 4 and Figure 4 can be found 'the difference is in the 4th The light guide plate is added. The rest of the white is the same as the difference. Refer to Fig. 5 and Fig. 4 for a cross-sectional view along the Α_Α axis. From Fig. 5, it can be observed that the light emitted by the illuminating unit 28 is guided by the light guide. Light ^• When no object is in contact, the light will be self-distributed to the light guide plate 4. If there is an object connected to _, because the refractive index of the object and the light guide plate 40 is equal to the refractive index of the air 201122965 and the light guide plate 40, The orientation of the light is changed, and the image capturing unit 24 can intercept the change. Similarly, the embodiment of FIG. 3 can also adopt the additional design of the light guide plate 40. Please refer to FIG. 6 , which is the optical touch of the present invention. In the fourth embodiment of the system, the design of the light guide plate 40 is added. The difference from the third figure is only the same as the addition of the light guide plate 40, and will not be described again. In practice, the settings of the three image capturing units can be set to two positions: two diagonals and one perimeter or two adjacent corners and adjacent sides. In the embodiment of Fig. 1, the position of the image capturing unit 24 may be set on the upper side, the lower side, the left side or the right side of the outer cover. In the embodiment of Fig. 3, the same effect can be achieved by placing the image capturing unit 26 on the left or right side of the outer cover 1 而非 instead of the lower side. However, correspondingly, for different setting positions, the processing unit must include the set angle in the parameter value of the calculation coordinate, which is computationally complicated. In addition, the light guide plate can be arranged in a single piece or multiple pieces. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any modifications and refinements that are made by those skilled in the art without departing from the spirit of the invention are intended to be encompassed by the present invention. In the scope of the patent application, the scope of the patent application scope of the present invention is subject to the definition of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a first embodiment of an optical touch system of the present invention; FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1; FIG. 3A is an optical of the present invention. The first example of the second embodiment of the touch system; 201122965 is the second example of the second embodiment of the optical touch system of the present invention; and the third embodiment is the second embodiment of the optical touch system of the present invention. The third example is the third embodiment of the optical touch system of the present invention; the fifth figure is a sectional view along the A-A axis of FIG. 4; and the sixth figure is the optical touch of the present invention. The fourth embodiment of the control system. [Main component symbol description]
1 光學觸控系統 10 外罩 12 液晶面板 22 第一影像擷取模組 24 第二影像擷取模組 26 第三影像擷取模組 28 第一發光單元 30 第二發光單元 32 第四影像擷取模組 40 導光板 A 軸線 T1 觸碰點 T2 觸碰點 □1 optical touch system 10 housing 12 liquid crystal panel 22 first image capturing module 24 second image capturing module 26 third image capturing module 28 first lighting unit 30 second lighting unit 32 fourth image capturing Module 40 Light guide plate A Axis T1 Touch point T2 Touch point □