201104536 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種觸控系統，尤其涉及一種光學式觸控系 統。 【先前技術】 [0002] 許多電子產品用觸控面板作為輸入方式，目前市場上的 觸控面板主要包括電阻式觸控面板、電容式觸控面板和 表面聲波式觸控面板。 [0003] 電阻式觸控面板的主要部分係一塊與顯示器表面非常配 合的電阻薄膜屏，這係一種多層的複合薄膜，它以一層 玻璃或硬塑膠平板作為基層，表面塗有一層透明氧化金 屬（透明的導電電阻）導電層，上面再蓋有一層外表面 硬化處理、光滑防擦之塑膠層、它的内表面亦塗有一層 塗層、在他們之間有許多細小的（小於1 /1 000英寸）的 透明隔離點把兩層導電層隔開絕緣。當手指觸摸螢幕時 ，兩層導電層在觸摸點位置就有了接觸，電阻發生變化 ，在X和Y兩個方向上產生訊號，然後送觸摸屏控制器。 控制器偵測到這一接觸並計算出（X，Y)的位置。電阻 式觸控屏不受塵埃、水、污物影響，能夠於較為惡劣情 況下工作；但是，金屬導電層比較薄且容易脆斷，塗得 太厚會降低透光率，並且經常被觸摸，使用一定時間後 會出現裂紋，甚至變形。 [0004] 電容式觸控面板係在薄膜表面貼上一層透明的特殊金屬 導電物質。當手指觸摸在金屬層上時，用戶和觸摸屏表 面形成以一個耦合電容，觸點的電容就會發生變化，使 098124988 表單編號A0101 第4頁/共17頁 0982042731-0 201104536 得與之相連的振盪器頻率發生變化，通過測量頻率變化 可以確定觸摸位置。由於電容隨溫度、濕度或接地情況 的不同而變化，故，穩定性較差，往往會產生漂移現象 〇 [0005] ❹ [0006] ❹ [0007] 表面聲波式觸控面板由屏體、表面聲波發生器、反射條 紋、表面聲波接收器和控制器組成。其中，表面聲波發 生器發送表面聲波跨越屏體表面，當手指觸及屏體時， 觸點的表面聲波即被阻止，控制器通過分析接收到的表 面聲波確定觸點的位置。表面聲波式觸控屏不受溫度、 濕度等環境因素影響，解析度高，有極好的防刮性，壽 命長；透光率高、能保持清晰的圖像品質；沒有漂移， 只需安裝時一次校正；有第三軸（即壓力軸）響應，目 前在公共場所使用較多。但是表面聲波會被水、灰塵、 油污甚至飲料的液體吸收，因此需經常清潔維護。 【發明内容】 有鑑於此，有必要提供一種結構簡單、綜合性能良好的 觸控系統。 一種觸控系統，包括：顯示面板，用於供觸控物觸控並 實現顯示内容，該顯示面板具有N條邊；N-1個紅外線感 測器，該N-1個紅外線感測器分別沿該顯示面板的N-1條 邊而設置；第一紅外光源及第二紅外光源，該第一及第 二紅外光源分別設置於該顯示面板之沒有設置紅外線感 測器的邊之兩個端點，該第一及第二紅外光源發出之紅 外線均覆蓋該顯示面板，該第一及第二紅外光源發出之 紅外線被該觸控物阻擋後分別在該N -1個紅外線感測器之 098124988 表單編號A0101 第5頁/共17頁 0982042731-0 201104536 其中一個上形成一個暗點；以及訊號處理器，接收該Nq 個紅外線感測器之暗點訊號並根據該暗點訊號在該N _ i個 紅外線感測器上之位置來判斷該觸控物在該顯示面板上 之觸控位置。 [0008] [0009] [0010] [0011] 098124988 相較於先前技術，本發明實施例提供之觸控系統之紅外 光源發出之紅外線覆蓋顯示面板表面，用戶利用觸控物 觸控顯示面板之某一點，觸控物便會擋住經過該位置之 紅外線，從而在相對應之紅外線感測器上形成暗點，根 據暗點與紅外光源之連線所成交點便可確定觸控物之觸 控位置，因此，該觸麵系統結構簡單；由於紅外線不受 電流、電壓和靜電干擾，所以適宜複雜環境條件。 【實施方式】 下面將結合附圖對本發明實施例作進一步之詳細說明。 請一併參閱圖1及圖2所示，本發明實施例提供之觸控系 統100包括顯示面板11〇、轉一紅外線感測器121、第二 紅外線感測器122、第三紅i卜線感測2 3、第一紅外光 源131、第二紅外光源132及訊號處理器14〇。 顯示面板110為矩形形狀，第一及第二紅外光源131、 132與第一、第二及第三紅外線感測器121、122、123位 於顯示面板11 〇面對用戶之同一側。三個紅外線感測器 121 ' 122、123分別沿顯示面板11〇之三條邊而設置。紅 外光源131 ' 132發出之光線覆蓋於整個顯示面板11〇， 並照射於紅外線感測器121、122、123上。觸控物例如 手指或觸控筆觸控於顯示面板110上，會阻擋紅外光線照 射至紅外線感測器，從而在紅外線感測器上形成暗點訊 0982042731-0 表單編號A0101 第6頁/共17頁 201104536 號，訊號處理器140分別與紅外線感測器121、122、123 電性連接’訊號處理器140接收紅外線感測器121、122 、123之暗點訊號並進行處理，計算出觸控點之位置。 [0012] 第一及第二紅外光源131、132位於顯示面板110之左右 上角，其為可以發出紅外線之發光二極體或鐳射二極體 ’且其出光角度可選擇為90度或大於90度，即，使紅外 光源131、132發出之光能覆蓋顯示面板11〇即可。 [0013] Ο 紅外線感測器121、122、123分別位於顯示面板11〇之左 右側邊及底邊。於本實施例中，第一、第二及第三紅外 線感測器121、122、123為缚型紅外终辱?測器，當然其 亦可以為面输紅外線感測器》第:二4箏二及第三紅外線 感測益 121、122、123為CCD(Cha:rge 'Coup 1 ed Device ’電荷耦合器件）感測器或者 CMOSCComplementary Metal Oxide Semiconductor ，互補金屬氧化物半導體記.憶體）感測器,，:其具有一排線 型排列之CCD感光單元或CMOS感光單元。 〇 [0014] 假設第三紅外線感測器i23之感光單元排列方向定義為χ 抽，第一紅外線感測器121之感光單元排列方向定義為γ 轴’ X轴與Υ轴之交點〇為紅外線感測器121、123之交點 ，亦即矩形顯示面板110底邊與左側邊之交點，即矩形之 左下頂點。同時定義第一紅外光源之位置位於Α點，第二 紅外光源之位置位於B點，其中，A、B兩點亦即矩形顯示 面板110之左上和右上兩個頂點。 [0015] 當某一觸控點位於顯示面板之Q點時，則由於觸控物之遮 098124988 表單編號A0101 第7頁/共17頁 0982042731-0 201104536 擋，經由A點之第一紅外光源131發出之光線在第三紅外 線感測器123上形成暗點N，且經由B點之第二紅外光源 132發出之光線在第三紅外線感測器123上形成暗點Μ。其 中，Μ點、Ν點即Α點及Β點分別與Q點之連線延長後與第三 紅外線感測器12 3之交點。由此反推，當知道Μ點及N點之 座標時，分別作Μ點與A、Β點之連線ΜΑ、MB，作Ν點與A 、6點之連線ΝΑ、NB，則可以得到MB與ΝΑ之交點Q之座標 ，而點Q正係觸控點之位置。 [0016] 由此可見，只要檢測到紅外線感測器上之暗點所在位置 ，即可計算出觸控點所處之位置。由於訊號處理器140與 第一、第二及第三紅外線感測器121、122、123分別電 性連接，則可將接收到之第一、第二或第三紅外線感測 器121、122、123感測到之暗點位置進行分析，進而得 到觸控物在顯示面板110上之觸控位置。 [0017] 在本實施例中，觸控系統100預先將Α點、Β點之座標作為 基本資料儲存在訊號處理器140中，只要觸控物在顯示面 板之有效區域内進行觸控操作，則訊號處理器140即會收 集到紅外線感測器121、122、123上之暗點訊號座標， 根據該暗點訊號座標和預先存儲好之A點、B點之座標可 以推算出觸控點所在位置Q之座標。 [0018] 由於觸控系統100包括三個紅外線感測器121、122、123 ，所以無論觸控點位於顯示面板之哪個位置，都可以根 據紅外線感測器121、12 2、12 3上之暗點位置來推算出 觸控點之位置。如圖3所示，當暗點位置Μ位於第一紅外 線感測器1 21上，暗點位置Ν位於第三紅外線感測器1 2 3上 098124988 表單編號Α0101 第8頁/共17頁 0982042731-0 201104536 [0019] 參 時，分別作Μ點、N點與A、Β點之連線ΜΑ、MB ' ΝΑ ' ΝΒ ，即得到MB與ΝΑ之交點P之座標，即觸控點之位置座標。 第一及第二紅外光源131、132之出光角度為90度，其可 以通過利用一紅外發光二極體、一準直透鏡及一驅動件 來實現，紅外發光二極體發出之光線經準直透鏡準直， 驅動件用於驅動紅外發光二極體與準直透鏡整體以90度_ 之角度快速作來回掃描擺動，以使第一或第二紅外光源 131、132發出之光線覆蓋整個顯示面板110。 Q [0020] 該第一及第二紅外光源131、132還可以由一紅外發光二 極體及一反射罩組成，紅外發光二極體設置於反射罩内 ，反射罩之形狀設置為可使紅外發光二級管發出之光線 經反射罩出射後之出光角度為90度，以使第一或第二紅 外光源131、132發出之光覆蓋整個顯示面板110。 [0021] ❹ 或者，第一及第二紅外光源131、132直接採用一封裝好 : :ί 之發光二極體器件，且該發光二極體器件之出光角度為 90度，以使第一或第二紅外光源131、132發出之光覆蓋 整個顯示面板110。 [0022] 第一及第二紅外光源131、132發出之紅外線覆蓋顯示面 板110表面，用戶利用觸控筆或手指等觸摸顯示面板110 之某一點，觸控筆便會擋住經過該位置之紅外線，觸控 筆所在位置對應之紅外線感測器上會形成暗點，訊號處 理器根據暗點所在位置便可計算出觸控筆之位置，因此 ，該觸控系統100結構簡單；由於紅外線不受電流、電壓 和靜電干擾，所以適宜複雜的環境條件。 098124988 表單編號A0101 第9頁/共17頁 0982042731-0 201104536 [0023] 可以理解，所述顯示面板U〇亦可以為其他形狀，例如： 梯形、三角形、五邊形#等’戶斤述紅外線感測器之個數 隨顯米面板110之邊數變化而變化。由於除了設置有紅外 光源之邡條邊不需要設置紅外線感測器外，其他邊均須 設置紅外線感測器，因此，當顯示面板110具有N條邊時 ，紅外線感測器之個數即為N〜1個。 [0024] 可以理解，第一及第二紅外光源131、132之出光角度當 顯示面板110為其他形狀時即相應設置為其他角度。例如 ，第〆紅外光源131具有第—出光角度，第一出光角度與 第一紅外光源131所在之顯示面板11〇之頂角的度數相同 或大於该頂角之度數，以使第一紅外光源131發出之光線 覆蓋整個顯示面板11〇。同樣地，.第二紅外光源132具有 第二出光角度，第二出光角度與第二紅外光源132所在之 顯示面板之頂角的度數相同或者大於該頂角的度數，以 使第二紅外光源1 32發出之光線覆蓋整個顯示面板丨i ^ [0025] 综上所述，本發明確已符合發明專利之要件，遂依法提 出專利中請。H上所述者僅為本㈣之較佳實施方 式’自不能以此限制本案之申請專利範圍。舉凡熟悉本 案技藝之人士援依本發明之精神所作之等效修飾或變化 ’皆應涵益於以下申凊專利範圍内。 【圖式簡單說明】 [0026] 圖1係本發明實施例提供之觸控系統之示轰圖。 [0027] 圖2及圖3均為圖1中觸控系統之工作原理示意圖。 【主要元件符號說明】 098124988 表單編號A0101 第10頁/共17頁 0982042731-0 觸控系統 100 顯示面板 110 第一紅外線感測器 121 第二紅外線感測器 122 第三紅外線感測器 123 第一紅外光源 131 第二紅外光源 132 訊號處理器 140 201104536 Ο201104536 VI. Description of the Invention: [Technical Field] The present invention relates to a touch system, and more particularly to an optical touch system. [Previous Technology] [0002] Many electronic products use a touch panel as an input method. Currently, touch panels on the market mainly include a resistive touch panel, a capacitive touch panel, and a surface acoustic wave touch panel. [0003] The main part of the resistive touch panel is a resistive film screen which is very compatible with the surface of the display. This is a multi-layer composite film which is made of a glass or hard plastic plate as a base layer and coated with a transparent oxidized metal ( Transparent conductive resistor) conductive layer, covered with a layer of external surface hardened, smooth anti-scratch plastic layer, its inner surface is also coated with a coating, there are many small between them (less than 1 / 1 000 The transparent isolation dots of the inch are insulated from the two conductive layers. When the finger touches the screen, the two conductive layers have contact at the touch point position, the resistance changes, and signals are generated in both the X and Y directions, and then sent to the touch screen controller. The controller detects this contact and calculates the position of (X, Y). The resistive touch screen is not affected by dust, water and dirt, and can work under severe conditions; however, the metal conductive layer is relatively thin and easy to be brittle, and coating too thick will reduce the light transmittance and is often touched. After a certain period of time, cracks may occur and even deformation may occur. [0004] A capacitive touch panel is provided with a transparent special metal conductive material on the surface of the film. When the finger touches the metal layer, the user and the surface of the touch screen form a coupling capacitor, and the capacitance of the contact changes, so that the 098124988 form number A0101 page 4/17 page 0982042731-0 201104536 has an oscillation connected thereto. The frequency of the device changes, and the touch position can be determined by measuring the frequency change. Since the capacitance varies with temperature, humidity, or grounding, the stability is poor and the drift phenomenon often occurs. [0005] ❹ [0006] ❹ [0007] The surface acoustic wave touch panel is generated by the screen and surface acoustic waves. It consists of a reflector, a reflection stripe, a surface acoustic wave receiver and a controller. Wherein, the surface acoustic wave generator sends a surface acoustic wave across the surface of the screen body, and when the finger touches the screen body, the surface acoustic wave of the contact is blocked, and the controller determines the position of the contact by analyzing the received surface acoustic wave. The surface acoustic wave touch screen is not affected by environmental factors such as temperature and humidity, has high resolution, excellent scratch resistance and long life; high light transmittance and clear image quality; no drift, only installation One time correction; there is a third axis (ie pressure axis) response, currently used in public places. However, surface acoustic waves are absorbed by water, dust, oil, or even beverage liquids, so they need to be cleaned and maintained frequently. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a touch system that has a simple structure and good overall performance. A touch system includes: a display panel for touching a touch object and realizing display content, the display panel having N sides; N-1 infrared sensors, the N-1 infrared sensors respectively The N-1 side of the display panel is disposed; the first infrared light source and the second infrared light source are respectively disposed at two end points of the side of the display panel where the infrared sensor is not disposed, The infrared rays emitted by the first and second infrared light sources cover the display panel, and the infrared rays emitted by the first and second infrared light sources are blocked by the touch object, and are respectively numbered in the form of the N-1 infrared sensor 098124988. A0101 Page 5 of 17 0982042731-0 201104536 One of the dark spots is formed; and the signal processor receives the dark point signal of the Nq infrared sensors and according to the dark point signal in the N _ i infrared The position on the sensor determines the touch position of the touch object on the display panel. [0009] [0011] [0011] 098124988 Compared with the prior art, the infrared light emitted by the infrared light source of the touch system provided by the embodiment of the present invention covers the surface of the display panel, and the user touches the display panel with the touch object. At one point, the touch object blocks the infrared rays passing through the position, thereby forming a dark spot on the corresponding infrared sensor, and determining the touch position of the touch object according to the point of the connection between the dark point and the infrared light source. Therefore, the contact system has a simple structure; since the infrared rays are not interfered by current, voltage and static electricity, it is suitable for complicated environmental conditions. [Embodiment] Hereinafter, embodiments of the present invention will be further described in detail with reference to the accompanying drawings. As shown in FIG. 1 and FIG. 2 , the touch control system 100 of the present invention includes a display panel 11 , an infrared sensor 121 , a second infrared sensor 122 , and a third red line . The sensing 2 3, the first infrared light source 131, the second infrared light source 132, and the signal processor 14A. The display panel 110 has a rectangular shape, and the first and second infrared light sources 131, 132 and the first, second, and third infrared sensors 121, 122, and 123 are located on the same side of the display panel 11 facing the user. Three infrared sensors 121' 122, 123 are provided along the three sides of the display panel 11 respectively. The light emitted from the red light source 131' 132 covers the entire display panel 11A and is incident on the infrared sensors 121, 122, 123. Touching a touch object such as a finger or a stylus on the display panel 110 blocks infrared light from being incident on the infrared sensor, thereby forming a dark spot on the infrared sensor. 0982042731-0 Form No. A0101 Page 6 of 17 On page No. 201104536, the signal processor 140 is electrically connected to the infrared sensors 121, 122, 123 respectively. The signal processor 140 receives the dark spot signals of the infrared sensors 121, 122, 123 and processes them to calculate the touch points. The location. [0012] The first and second infrared light sources 131, 132 are located at the upper left and right upper corners of the display panel 110, which are light emitting diodes or laser diodes that can emit infrared rays and have a light extraction angle of 90 degrees or more. The degree, that is, the light emitted from the infrared light sources 131, 132 can cover the display panel 11 〇. [0013] The infrared sensors 121, 122, and 123 are respectively located on the left and right sides and the bottom side of the display panel 11A. In this embodiment, the first, second, and third infrared sensors 121, 122, and 123 are closed-type infrared final humbuckers, and of course, they can also be surface-infrared sensors: 2: 4 The second and third infrared sensing benefits 121, 122, 123 are CCD (Cha: rge 'Coup 1 ed Device ' charge coupled device) sensor or CMOS C Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor memory ,: It has a line of CCD photosensitive cells or CMOS photosensitive cells. 00[0014] It is assumed that the direction of arrangement of the photosensitive cells of the third infrared sensor i23 is defined as χ, and the direction of arrangement of the photosensitive cells of the first infrared sensor 121 is defined as the γ-axis 'the intersection of the X-axis and the 〇 axis 〇 is an infrared sensation The intersection of the detectors 121, 123, that is, the intersection of the bottom side and the left side of the rectangular display panel 110, that is, the lower left vertex of the rectangle. At the same time, the position of the first infrared light source is located at the defect point, and the position of the second infrared light source is located at point B, wherein the two points A and B are the upper left and upper right vertices of the rectangular display panel 110. [0015] When a certain touch point is located at the Q point of the display panel, the first infrared light source 131 passing through the point A is blocked by the touch object 098124988 form number A0101 page 7/17 page 0982042731-0 201104536 block. The emitted light forms a dark spot N on the third infrared ray sensor 123, and the light emitted from the second infrared light source 132 at the B point forms a dark spot 在 on the third infrared ray sensor 123. Among them, the defect point, the defect point, the defect point and the defect point are respectively extended with the connection point of the Q point and the intersection with the third infrared sensor 12 3 . Therefore, when you know the coordinates of the defect and the N point, respectively, the connection point of the defect point to the A and the defect point, MB, and the connection point of the point A and the 6 point, NB, can be obtained. The intersection of MB and ΝΑ is the coordinate of point Q, and point Q is the position of the touch point. [0016] It can be seen that as long as the position of the dark spot on the infrared sensor is detected, the position of the touch point can be calculated. Since the signal processor 140 is electrically connected to the first, second, and third infrared sensors 121, 122, and 123, respectively, the first, second, or third infrared sensors 121, 122 can be received. The position of the dark spot sensed by 123 is analyzed, and the touch position of the touch object on the display panel 110 is obtained. [0017] In the embodiment, the touch system 100 stores the coordinates of the defect and the defect as the basic data in the signal processor 140, as long as the touch object performs the touch operation in the effective area of the display panel. The signal processor 140 collects the dark spot signal coordinates on the infrared sensors 121, 122, and 123, and can calculate the position of the touch point according to the dark spot signal coordinates and the coordinates of the A and B points stored in advance. The coordinates of Q. [0018] Since the touch system 100 includes three infrared sensors 121, 122, and 123, no matter where the touch point is located on the display panel, it may be dark according to the infrared sensors 121, 12 2, and 12 The point position is used to derive the position of the touch point. As shown in FIG. 3, when the dark spot position is located on the first infrared sensor 1 21, the dark spot position is located on the third infrared sensor 1 2 3 098124988 Form No. 101 0101 Page 8 / Total 17 Page 0982042731- 0 201104536 [0019] Time-division, respectively, as a point, N point and A, a connection point MB, MB ' ΝΑ ' ΝΒ, that is, the coordinates of the intersection point of MB and ΝΑ, that is, the position coordinates of the touch point. The first and second infrared light sources 131 and 132 have an exit angle of 90 degrees, which can be realized by using an infrared light emitting diode, a collimating lens and a driving member, and the light emitted by the infrared light emitting diode is collimated. The lens is collimated, and the driving component is used for driving the infrared light emitting diode and the collimating lens to quickly scan back and forth at an angle of 90 degrees _, so that the light emitted by the first or second infrared light sources 131, 132 covers the entire display panel. 110. [0020] The first and second infrared light sources 131, 132 may also be composed of an infrared light emitting diode and a reflective cover, and the infrared light emitting diode is disposed in the reflective cover, and the shape of the reflective cover is set to enable infrared The light emitted from the light-emitting diode passes through the reflector to have an exit angle of 90 degrees, so that the light emitted by the first or second infrared light sources 131, 132 covers the entire display panel 110. [0021] ❹ Alternatively, the first and second infrared light sources 131, 132 directly adopt a packaged light-emitting diode device, and the light-emitting diode device has an exit angle of 90 degrees to make the first or The light emitted by the second infrared light sources 131, 132 covers the entire display panel 110. [0022] The infrared rays emitted by the first and second infrared light sources 131, 132 cover the surface of the display panel 110, and the user touches a certain point of the display panel 110 by using a stylus pen or a finger, etc., and the stylus pen blocks the infrared rays passing through the position. A dark spot is formed on the infrared sensor corresponding to the position of the stylus, and the signal processor can calculate the position of the stylus according to the position of the dark spot. Therefore, the touch system 100 has a simple structure; , voltage and static interference, so suitable for complex environmental conditions. 098124988 Form No. A0101 Page 9 of 17 0982042731-0 201104536 [0023] It can be understood that the display panel U〇 can also have other shapes, such as: trapezoidal, triangular, pentagonal, etc. The number of detectors varies with the number of sides of the display panel 110. Since the infrared sensor is not required to be disposed besides the edge of the infrared light source, the infrared sensor is required on the other sides. Therefore, when the display panel 110 has N sides, the number of the infrared sensors is N~ One. [0024] It can be understood that the light exit angles of the first and second infrared light sources 131, 132 are correspondingly set to other angles when the display panel 110 has other shapes. For example, the second infrared light source 131 has a first light-emitting angle, and the first light-emitting angle is equal to or greater than the degree of the apex angle of the display panel 11 所在 where the first infrared light source 131 is located, so that the first infrared light source 131 The emitted light covers the entire display panel 11〇. Similarly, the second infrared light source 132 has a second light-emitting angle, and the second light-emitting angle is equal to or greater than the degree of the apex angle of the display panel where the second infrared light source 132 is located, so that the second infrared light source 1 The light emitted by 32 covers the entire display panel. [0025] In summary, the present invention has indeed met the requirements of the invention patent, and the patent is filed according to law. The above description of H is only the preferred embodiment of this (4), which cannot limit the scope of patent application in this case. Equivalent modifications or variations made by those skilled in the art in light of the spirit of the invention are intended to be within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS [0026] FIG. 1 is a schematic diagram of a touch system provided by an embodiment of the present invention. 2 and FIG. 3 are schematic diagrams showing the working principle of the touch system of FIG. 1. [Main component symbol description] 098124988 Form No. A0101 Page 10 of 17 0982042731-0 Touch system 100 Display panel 110 First infrared sensor 121 Second infrared sensor 122 Third infrared sensor 123 First Infrared light source 131 second infrared light source 132 signal processor 140 201104536 Ο
098124988 表單編號Α0101 第11頁/共17頁 0982042731-0098124988 Form NumberΑ0101 Page 11 of 17 0982042731-0