201227461 六、發明說明： 【發明所屬之技術領域】 剛本發明涉及-種光㈣測系統及應用該光學制系統的 觸摸屏。 【先前彳支術】 [_傳統上，運用於電腦輪人系統的光學細u統通常會在 偵測區（例如一顯示熒幕或一觸控板）的周圍環繞設置 多個影像或光學偵測器。例如，設置多個影像偵測器裝 設於一顯示熒幕的左上和右上兩端，藉以當顯示熒幕被 觸摸時截取觸控物件的影像以及偵測區的影像。觸摸物 件的位置就可以根據影像偵齡器‘所獲得的影像信號計算 出來。或者一般會利用光學鏡片將光源發射的光束反射 至偵測區域内，當照射至位於偵測區的物件時，光束被 物件反射，並經過導引透鏡接收並導引，偵測器接受該 導引透鏡所導引的反射光，將物件的影像成像於偵測器 上。 [〇〇〇3]但是，顯示熒幕的四個邊上的空間袜影像偵測器、光學 偵測器及透鏡等光學鏡片所佔滿，使得已知的光學偵測 系統的結構大都太複雜，因此不管在製造或維修上，所 需成本都較高。而，若用於較大顯示熒幕時，光線經過 多次的反射後，會使得反射光不均勻或強度不足，影響 偵測的準確性。 【發明内容】 [0004]有鑒於此，有必要提供一種結構較為簡單的光學偵測系 統，以有效偵測物件。 099144928 表單編號A0101 0992077582-0 201227461 [0005] 還有必要提供一種應用所述光學偵測系統的觸摸屏。 [0006] —種光學偵測系統，用以偵測靠近或接觸一偵測區域的 一物件，該光學偵測系統包括：至少兩個發光單元，沿 偵測區域一側的邊緣設置，用於發射光束。光學鏡片， 裝設於偵測區域的另一側，與該發光單元相對，並與偵 測區域側邊框保持一定距離，用於接收並導引該發光單 元所發出的光，其中當該光照射至該對象時，部分光被 該對象遮擋。感光元件，裝設於該光學鏡片遠離偵測區 ^ 域的一側，並與該光學鏡片保持一定距離，用於接收經 該光學鏡片導引的光並在該感光元件上成像，被該物件 遮擋的部分光在該感光元件上形成至少兩個像點。該光 • 學偵測系統還包括處理單元，用於接收該感光元件所偵 測到的位置信號，並計算該物件接觸該顯示熒幕時的位 置。 [0007] 一種觸摸屏，該觸摸屏包括一顯示熒幕，還包括光學偵 測系統，用以偵測靠近或接觸該顯示熒幕的一對象。該 Ο 光學偵測系統包括：至少兩個發光單元，沿顯示熒幕一 侧的邊緣設置，用於發射光束。光學鏡片，裝設於顯示 熒幕的另一侧，與該發光單元相對，並與顯示熒幕側邊 框保持一定距離，用於接收並導引該發光單元所發出的 光，其中當該光照射至該對象時，部分光被該對象遮擋 。感光元件，裝設於該光學鏡片遠離顯示熒幕的一侧， 並與該光學鏡片保持一定距離，用於接收經該光學鏡片 導引的光並在該感光元件上成像，被該物件遮擋的部分 光在該感光元件上形成至少兩個像點。處理單元，用於 099144928 表單編號A0101 第5頁/共18頁 0992077582-0 201227461 接收該感光元件所偵測到的位置信號，並計算該物件接 觸該顯示熒幕時的位置。 [0008] [0009] [0010] [0011] 099144928 相對於現有技術，本翻提供的-種光學W统，可 、偵測並疋位；^件接觸顯示焚幕的位置。此光學偵 系''先較已知的光學偵n統在結構設計上較為簡單， 且發射光不需要經過多次反射，即可成像於感光元件。 口而，月b夠更容易且經濟、準確地確定物件觸摸位置。 【實施方式】 下麵將結合附圖，對本發明作進一步的詳細說明。 晴參閱圖1，為本發明一具競實施例的光學谓測系統的示 意圖。該光學偵測系統1 〇，可實施於一顯示熒幕上，用 於疋位接觸顯不熒幕的物件（例如使用者的手指、觸控 筆或其他物體）在顯示熒幕上的座標◊該光學偵測系統 1〇包括若干個發光單元100、光學鏡片102及感光元件 103。其中，該多個發光單元1〇〇以排列成一列的形式設 置於一偵測區域101的一側，可朝向翁測區域1〇1發射大 致平行於偵測區域101的平面光束，在本實施例申，該發 光單元100包括發光單元l〇〇a*l〇〇b，該發光單元i〇〇a 和100b可以為發光二極體（LED)和紅外發射管等光源， 用於發射相應的光束。 光學鏡片1 0 2裝設於偵測區域1 〇 1的另一側，與發光單元 10 0相對’並距離彳貞測區域1 〇 1最近的側邊框2倍焦距的位 置’該光學鏡片102經配置可接收上述發光單元1〇0所發 出的光，並將光導引至感光元件103上。上述光學偵測系 統10可包括多個光學鏡片，該多個光學鏡片1 〇 2沿偵測區 表單編號A0101 第6頁/共18頁 0992077582-0 201227461 域1 0 1上與發光單元1 〇 〇相對的一側排列成一列’能導引 發射光使其成像於感光元件1 〇 3上即可。在本實施例中， 光學偵測系統10包括2面光學鏡片102a和102b，排列成 一列，且每一面光學鏡片102均為凸透鏡，凸透鏡的光軸 大致平行。 [0012]201227461 VI. Description of the Invention: [Technical Field] The present invention relates to a light (four) measuring system and a touch screen to which the optical system is applied. [Previous sputum] [_ Traditionally, the optical system used in the computer wheel system usually surrounds multiple imaging or optical detection around the detection area (such as a display screen or a touchpad). Detector. For example, a plurality of image detectors are disposed on the upper left and upper right ends of a display screen, so that the image of the touch object and the image of the detection area are intercepted when the display screen is touched. The position of the touch object can be calculated from the image signal obtained by the image chronograph. Or generally, the optical lens is used to reflect the light beam emitted by the light source into the detection area. When the object is located in the detection area, the light beam is reflected by the object, and is received and guided by the guiding lens, and the detector receives the light guide. The reflected light guided by the lens is used to image the image of the object on the detector. [〇〇〇3] However, the optical lenses such as the space sock image detector, optical detector and lens on the four sides of the screen are filled, making the structure of the known optical detection system too complicated. Therefore, the cost is high regardless of manufacturing or maintenance. However, if it is used for a large display screen, the light will be reflected multiple times, which will make the reflected light uneven or insufficient, which will affect the accuracy of detection. SUMMARY OF THE INVENTION [0004] In view of the above, it is necessary to provide a relatively simple optical detection system to effectively detect objects. 099144928 Form No. A0101 0992077582-0 201227461 [0005] It is also necessary to provide a touch screen to which the optical detection system is applied. [0006] An optical detection system for detecting an object approaching or contacting a detection area, the optical detection system comprising: at least two illumination units disposed along an edge of one side of the detection area, for The beam is emitted. The optical lens is disposed on the other side of the detecting area, opposite to the light emitting unit, and is spaced apart from the side border of the detecting area for receiving and guiding the light emitted by the light emitting unit, wherein the light is irradiated When the object is reached, part of the light is blocked by the object. a photosensitive element mounted on a side of the optical lens away from the detection area and at a distance from the optical lens for receiving light guided by the optical lens and imaging on the photosensitive element Part of the occluded light forms at least two image points on the photosensitive element. The optical detection system further includes a processing unit for receiving a position signal detected by the photosensitive element and calculating a position at which the object contacts the display screen. A touch screen includes a display screen, and an optical detection system for detecting an object approaching or contacting the display screen. The 光学 optical detection system includes: at least two illumination units disposed along an edge of the display screen for emitting a light beam. An optical lens is disposed on the other side of the display screen opposite to the light emitting unit and at a distance from the display side frame for receiving and guiding light emitted by the light emitting unit, wherein the light is illuminated When the object is reached, part of the light is blocked by the object. a photosensitive element mounted on a side of the optical lens away from the display screen and at a distance from the optical lens for receiving light guided by the optical lens and imaging on the photosensitive element, obscured by the object Part of the light forms at least two image points on the photosensitive element. Processing unit, for 099144928 Form No. A0101 Page 5 of 18 0992077582-0 201227461 Receive the position signal detected by the sensor and calculate the position of the object when it touches the display screen. [0010] [0011] 099144928 Compared with the prior art, the optical system provided by the present invention can detect, clamp and position; the contact of the component displays the position of the burnt screen. The optical detector '' is more simple in structure design than the known optical detection system, and the emitted light can be imaged on the photosensitive element without multiple reflections. Mouth, month b is easier and more economical and accurate to determine the touch position of the object. [Embodiment] Hereinafter, the present invention will be further described in detail with reference to the accompanying drawings. 1 is a schematic diagram of an optical metrology system according to an embodiment of the present invention. The optical detection system 1 can be implemented on a display screen for clamping the coordinates of an object (such as a user's finger, a stylus or other object) on the display screen. The optical detection system 1 includes a plurality of light emitting units 100, an optical lens 102, and a photosensitive element 103. The plurality of light emitting units 1 设置 are arranged in a row and arranged on one side of a detecting area 101, and can emit a planar light beam substantially parallel to the detecting area 101 toward the detecting area 1 ,1. For example, the light emitting unit 100 includes a light emitting unit 10a*1〇〇b, and the light emitting units i〇〇a and 100b may be light sources such as a light emitting diode (LED) and an infrared emitting tube, for transmitting corresponding beam. The optical lens 102 is mounted on the other side of the detection area 1 〇1, opposite to the light-emitting unit 100 and at a position 2 times the focal length of the side frame closest to the detection area 1 〇1. The arrangement is configured to receive light emitted by the above-described light emitting unit 110 and direct light to the photosensitive element 103. The optical detection system 10 may include a plurality of optical lenses, the plurality of optical lenses 1 〇 2 along the detection area form number A0101, page 6 / 18 pages 0992077582-0 201227461 domain 1 0 1 and the light unit 1 〇〇 The opposite side is arranged in a row to guide the emitted light to be imaged on the photosensitive element 1 〇3. In the present embodiment, the optical detection system 10 includes two-sided optical lenses 102a and 102b arranged in a row, and each of the optical lenses 102 is a convex lens, and the optical axes of the convex lenses are substantially parallel. [0012]
感光元件103裝設於光學鏡片102遠離偵測區域101的一 侧’並與該光學鏡片102中心點相距1倍焦距的距離，發 光單元100發出的並經過偵測區域1〇1和光學鏡片1〇2的 光在該感光元件1 〇 3上成像。可科用能夠偵測一維位置信 號的疋件來作為本案所述的感光元件1〇3V包括線性互補 金屬氧化半導趙（linear CMOS)、線性電躺合元件（ linear CCD)與光學位置感知元掉（0pticai p〇Si_ tion-sensingdetector)。在本實施例中，該感光元 件103為線性電耦合元件（linear CCD)組成。 [0013] Ο 一般而言’上述發光單元1〇〇發出的平面光會略高於偵測 區域101的表面且大致平行於偵測區域ι〇ι的表面。該偵 測區域101可位於1顯呆熒幕的顯示面上。因此，當有一 物件（如手指）與侧區域UU的表Φ (如顯示癸幕的顯 不面）接觸時，照射到該對象上的平面光就會被物件遮 擋，而在感光元件103上形成黑像點。 [0014] 099144928 … 以發光單元100a和光學鏡片102a為例，從 Z單元iGOa發出的光經光學鏡㈣2a後在感光元件 =像。如圖2所示，當手指位於偵測區細内時， =1〇3(線性⑽可制到由發光單元ma所發 表單=號，並=信號成像，而被這根手指遮 第7頁/共18頁 0992077582-0 201227461 擋的光由於不能夠被導引至感光元件！ 〇3上·，相較於其他 光線所成的像，而形成一像點。 [0015] [0016] [0017] 099144928 在本實例中’光學偵測系統1〇還包括一處理單元1〇4，該 處理單元1 0 4能夠接收感光元件1 〇 3所偵測到的位置信號 ，並利用三角定位法來計算物件接觸偵測區域丨〇丨時的位 置。 請參閱圖3，進一步說明處理單元1〇4利用三角定位法來 計算物件接觸偵測區域的位置的原理。發光單元丨〇 〇 a、 i〇〇b發射出的光線分別穿越光學鏡片1023和1021)後，在 感光元件103上產生位置信號而形成對應的影像。當物件 300與偵測區域ιοί接觸時，分別將發光單元1〇〇a*1〇〇b 所發出的光束100a’和100b’遮擋住，而在感光元件 103上產生位置信號而形成物件3〇〇的像點，即影像3〇〇3 ’和300b’ 。處理單元1〇4能夠由影像3〇〇a，、3〇〇b， 的位置獲知兩個影像之間的距離S。; 光學鏡片102a和l〇2b分別有一光軸線112a和112b，且 112a、112b分別和l〇〇a’ 、100b’ 的延長線ii〇a’ 、 UOb’形成夾角、02。此外，在感光元件103上形成 的像點的影像300a’ 、300b，與轴線112a、112b和感 光元件103的交點之間有一距離，分別是1^與1^，上述距 離會隨著物件300和偵測區域101接觸位置移動而改變， 而處理單元104能夠由影像300a， 、300b，的成像位置 獲知此距離。F!、F/分別是光學鏡片102a、102b的焦距 。另外，光束100a’ 、100b’的延長線ll〇a’ 、u〇b » 之間形成夾角為α ’且夾角α、6^、6>2的角度大小會 表單蝙號AG1G1 第8頁/共18頁 0992077582-0 201227461 隨著物件300接觸偵測區域101的位置移動而改變，其中 處理單元104可以利用以下方程式1、2和3來計算各角度 ，其中n= 1或2 : [0018] 0 =arctan(F /L )(方程式 1 ); η η η [0019] β =9Ο°-0 (方程式2); η η [0020] 6^=180^-/^ (方程式3)； [0021] 其後，由於每個物件300與兩個黑像點的影像所成的三角 形的三個夾角角度是唯一的，這樣，處理單元104即可根 〇 據ct、、召2及呂進一步確定出物件300在偵測區域101 中的座標（也就是物件3 0 C和偵測區域101接觸的位置） 〇 [0022] 請參照圖4，將光學楨測系統10整合於顯示熒幕400的周 圍，與顯示熒幕400—同構成一觸摸屏。在本實施例中， 光學偵測系統10包含處理單元104 (圖未示）以及分別設 於顯示熒幕400左方邊緣的發光單元100陣列，及依次設 〇 於顯示熒幕400右方的光學鏡片102和感光元件103。每 一個發光單元100皆可朝向偵測區域101 (顯示熒幕400 的顯示區域）發出平面光。感光元件10 3可接收穿過光學 鏡片102的光線。在其他實施方式中，光學偵測系統10可 整合於顯示熒幕400的上、下邊緣。該光學偵測系統10還 可以可拆卸方式安裝於顯示熒幕400的周圍。 [0023] 使用上述光學偵測系統，此光學偵測系統可用以偵測並 定位一物件接觸顯示熒幕的位置。此光學偵測系統較已 知的光學偵測系統在結構設計上較為簡單，且發射光不 099144928 表單編號 A0101 第 9 頁/共 18 頁 0992077582-0 201227461 需要經過多次反射，即可成像於感光元件。因而，能夠 更容易且經濟、準綠地確定物件觸摸位置。 [0024] 可以理解的是，對於本領域的普通技術人員來說，可以 根據本發明的技術構思做出其他各種相應的改變與變形 ，而所有這些改變與變形都應屬於本發明權利要求的保 護範圍。 【圖式簡單說明】 [0025] 圖1為本發明一具體實施例的光學偵測系統的示意圖。 [0026] 圖2為圖1中的光學偵測系統在偵測物件時的示意圖與所 產生的信號圖。 [0027] 圖3為位於偵測區域中的物件以及該物件成像於光學偵測 系統的示意圖。 [0028] 圖4為本發明一具體實施例的光學偵測系統運用於顯示熒 幕構成一觸摸屏的示意圖。 【主要元件符號說明】 [0029] 光學偵測系統：1 0 [0030] 發光單元 _· 100、100a、100b [0031] 偵測區域：101 [0032] 光學鏡片：102、102a、102b [0033] 感光元件：103 [0034] 處理單元 104 : 104 [0035] 光束：100a’ 、10Ob’ 099144928 表單編號A0101 第10頁/共18頁 0992077582-0 201227461 [0036] 光束延長線：11 〇a’ 、 110b’ [0037] 轴線 ：112a ' 112b [0038] 距離 ：Li'L2'S [0039] 焦距 ：Fi'F2 [0040] 對象 ：300 [0041] 影像 :300a， 、300b’ [0042] 夾角 ..a、θ、' Θ 9 ' 1 u 099144928 表單編號A0101 第11頁/共18頁 0992077582-0The photosensitive element 103 is disposed on a side of the optical lens 102 away from the detecting area 101 and is at a focal length of 1 times from the center point of the optical lens 102. The light emitting unit 100 emits the detected area 1〇1 and the optical lens 1 The light of 〇2 is imaged on the photosensitive element 1 〇3. The utility model can detect the one-dimensional position signal as the photosensitive element 1 〇 3V described in the present invention, including linear complementary metal oxidized semi-conducting linear CMOS, linear CCD and optical position sensing. Yuan (0pticai p〇Si_ tion-sensingdetector). In the present embodiment, the photosensitive element 103 is composed of a linear CCD. [0013] Ο In general, the planar light emitted by the light-emitting unit 1 is slightly higher than the surface of the detection area 101 and substantially parallel to the surface of the detection area ι〇ι. The detection area 101 can be located on the display surface of the display screen. Therefore, when an object (such as a finger) is in contact with the surface Φ of the side area UU (such as the display surface of the display curtain), the planar light irradiated onto the object is blocked by the object and formed on the photosensitive member 103. Black like dots. [0014] 099144928 ... Taking the light-emitting unit 100a and the optical lens 102a as an example, the light emitted from the Z-unit iGOa passes through the optical mirror (4) 2a after the photosensitive element = image. As shown in Fig. 2, when the finger is located in the thin of the detection area, =1〇3 (linear (10) can be made to the single = number issued by the light-emitting unit ma, and = signal imaging, and the finger is covered by the seventh page / Total 18 pages 0992077582-0 201227461 The light of the block cannot be guided to the photosensitive element! 〇3, which forms an image point compared to the image formed by other rays. [0015] [0017] 099144928 In the present example, the optical detection system 1A further includes a processing unit 1〇4, which is capable of receiving a position signal detected by the photosensitive element 1 〇3 and calculating by using a triangulation method. The position when the object contacts the detection area 请. Please refer to FIG. 3 to further explain the principle that the processing unit 〇4 uses the triangulation method to calculate the position of the object contact detection area. The illumination unit 丨〇〇a, i〇〇 After the emitted light passes through the optical lenses 1023 and 1021, respectively, a position signal is generated on the photosensitive element 103 to form a corresponding image. When the object 300 is in contact with the detection area ιοί, the light beams 100a' and 100b' emitted by the light-emitting units 1a**1〇〇b are respectively blocked, and a position signal is generated on the photosensitive element 103 to form an object 3〇. The image points of the , are the images 3〇〇3 'and 300b'. The processing unit 1〇4 can know the distance S between the two images from the positions of the images 3〇〇a, 3〇〇b. The optical lenses 102a and 102b respectively have optical axes 112a and 112b, and 112a, 112b form an angle with the extension lines ii 〇 a' and UOb' of l 〇〇 a' and 100 b', respectively. In addition, there is a distance between the images 300a', 300b of the image points formed on the photosensitive element 103 and the intersections of the axes 112a, 112b and the photosensitive element 103, which are 1^ and 1^, respectively, which will follow the object 300. The position of the contact area of the detection area 101 changes and the processing unit 104 can know the distance from the imaging position of the image 300a, 300b. F!, F/ are the focal lengths of the optical lenses 102a, 102b, respectively. In addition, the angles between the extension lines ll〇a' and u〇b» of the light beams 100a' and 100b' are α' and the angles of the angles α, 6^, 6>2 are in the form of the bat number AG1G1. Page 18, 0992077582-0 201227461 Changes as the object 300 contacts the positional movement of the detection area 101, wherein the processing unit 104 can calculate the angles using Equations 1, 2, and 3 below, where n = 1 or 2: [0018] =arctan(F /L )(Equation 1); η η η [0019] β =9Ο°-0 (Equation 2); η η [0020] 6^=180^-/^ (Equation 3); [0021] Thereafter, since the angles of the three angles of the triangle formed by the image of each object 300 and the two black image points are unique, the processing unit 104 can further determine the object according to ct, call 2 and Lu. The coordinates of the 300 in the detection area 101 (that is, the position where the object 3 0 C and the detection area 101 are in contact with each other) 002 [0022] Referring to FIG. 4, the optical metrology system 10 is integrated around the display screen 400, and The display screen 400 is configured to form a touch screen. In this embodiment, the optical detection system 10 includes a processing unit 104 (not shown) and an array of light emitting units 100 respectively disposed on the left edge of the display screen 400, and opticals disposed on the right side of the display screen 400. Lens 102 and photosensitive element 103. Each of the light emitting units 100 emits planar light toward the detection area 101 (display area of the display screen 400). Photosensitive element 103 can receive light that passes through optical lens 102. In other embodiments, the optical detection system 10 can be integrated into the upper and lower edges of the display screen 400. The optical detection system 10 can also be detachably mounted around the display screen 400. [0023] Using the optical detection system described above, the optical detection system can be used to detect and position an object in contact with the display screen. Compared with the known optical detection system, the optical detection system is simple in structure design, and the emitted light is not 099144928. Form No. A0101 Page 9 of 18 0992077582-0 201227461 Needs multiple reflections to be imaged element. Thus, the object touch position can be determined more easily and economically and quasi-green. [0024] It is to be understood that various other changes and modifications can be made in accordance with the technical concept of the present invention, and all such changes and modifications should be protected by the claims of the present invention. range. BRIEF DESCRIPTION OF THE DRAWINGS [0025] FIG. 1 is a schematic diagram of an optical detection system according to an embodiment of the present invention. 2 is a schematic diagram of the optical detection system of FIG. 1 in detecting an object and a generated signal diagram. [0027] FIG. 3 is a schematic illustration of an object located in a detection area and the object being imaged in an optical detection system. 4 is a schematic diagram of an optical detection system for displaying a screen to form a touch screen according to an embodiment of the present invention. [Main component symbol description] [0029] Optical detection system: 1 0 [0030] Light-emitting unit _· 100, 100a, 100b [0031] Detection area: 101 [0032] Optical lens: 102, 102a, 102b [0033] Photosensitive element: 103 [0034] Processing unit 104: 104 [0035] Light beam: 100a', 10Ob' 099144928 Form number A0101 Page 10/Total 18 page 0992077582-0 201227461 [0036] Beam extension line: 11 〇a', 110b [0037] Axis: 112a ' 112b [0038] Distance: Li'L2'S [0039] Focal length: Fi'F2 [0040] Object: 300 [0041] Image: 300a, 300b' [0042] Angle: a, θ, ' Θ 9 ' 1 u 099144928 Form number A0101 Page 11 of 18 0992077582-0