201117062 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種手寫輸入光筆及具有該手寫輸入光筆的 光學觸控系統。 【先前技#f】 [0002] 在電子裝置内，傳統的手寫輸入方式為在具備觸摸功能 的顯示幕上，利用金屬或塑膠的手寫筆在該顯示幕上進 行書寫，該顯示幕識別該手寫筆的書寫軌跡，進而達到 手寫輸入的目的。惟，這樣以物理接觸的方式進行手寫 ^ 輸入，容易使該顯示幕損壞。 [0003] 目前，一種新興的光學觸控方式被發展起來。該光學觸 控方式為採用一個手寫輸入光筆於一個手寫板區域内投 影光點，並利用該手寫輸入光筆書寫欲輸入的文字或者 圖形，然後，利用一個偵測設備對光點的軌跡進行記錄 ，藉由運算得到與該光點的移動軌跡相一致的文字或者 圖形，進而實現手寫輸入。由於在這種光學觸控方式中 0,該偵測設備只對光點的移動軌跡進行記錄，因而無需 .. .. ... 與顯示幕進行物理接觸而慢慢取代傳統的手寫輸入方式 。因此，如何設計出一種手寫輸入光筆及具有該手寫輸 入光筆的光學觸控系統成為現在亟待解決的問題。 【發明内容】 [0004] 一種手寫輸入光筆，其包括：一個外殼、一個紅外光源 、一個會聚鏡片以及一個筆頭。該筆頭包括一個位於該 外殼内的收容端及與該收容端相背且位於該外殼外的一 個書寫端，該筆頭開設一個自該收容端向該書寫端貫穿 098138319 表單編號A0101 第5頁/共18頁 0982065723-0 201117062 該筆頭的通孔。該會聚鏡片設置於該收容端。該紅外光 源位於該外殼内並用於發射紅外光線。該會聚鏡片用於 將該紅外光線會聚以使該紅外光線穿過該通孔並投射至 該書寫端。' [0005] —種光學觸控系統，其包括上述手寫輸入光筆及一個紅 外攝像模組。該手寫輸入光筆用於經該書寫端投射一個 紅外光點。該紅外攝像模組用於攝取該紅外光點的移動 軌跡。 [0006] 所述的手寫輸入光筆及光學觸控系統藉由書寫端在手寫 區域進行書寫，同時，光源發出的紅外光線經會聚鏡片 投射在該書寫端以形成紅外光點，實現了光點的形成， 進而實現了光學觸控輸入。 【實施方式】 [0007] 下面將結合附圖對本發明作進一步詳細說明。 [0008] 請參閱圖1及圖2，本發明第一實施方式提供的一種手寫 輸入光筆100包括：一個外殼10、一個紅外光源20、一個 會聚鏡片30以及一個筆頭40。 [0009] 該外殼10為中空的筒狀結構，如圓筒狀或方筒狀結構。 本實施方式中，外殼10為圓筒狀結構。外殼10内部形成 容置空間12，該容置空間12用於容置該紅外光源20及該 會聚鏡片30。外殼10的材料可選自金屬或塑膠。 [0010] 該紅外光源20為紅外線發光二極體以發射紅外光線，比 可見光提高了光線的可偵測性，以提高偵測設備的偵測 準確率。紅外光源20包括發光體22及引腳24。該發光體 098138319 表單編號A0101 第6頁/共18頁 0982065723-0 201117062 [0011] 〇 [0012] [0013] Ο 22發射紅外光，引腳24與發光體22電連接並用於與手寫 輸入光筆100的電源（圖未示）相連。 該會聚鏡片30為新月形的凸透鏡’其設置於紅外光源20 的出光光路上。會聚鏡片30包括用於會聚光線的有效光 學部32以及位於該有效光學部32周圍的支撐部34。該支 樓部34用於將會聚鏡片3G 111定在容置空間12内。本實施 方式中，該支撐部34為圍繞有效光學部32周緣的環形支 撐部。 有效光學部32包括光學凸面32a及與光學凸面32a相背的 光學凹面32b， 光學凸面32a比光學凹面32b更遠離紅外 光源20。本實施方式中，會聚鏡片30的材料為容易成型 的塑膠。 該筆頭40為階梯形的圓柱狀結構。筆頭40包括一個位於 該外殼10的容置空間12内的收容端42及與該收容端42相 背且位於該外殼10外的一偃書寫端4.4。筆頭開設一個 自該收容端42向該書寫端Φ4賞漦諸每讀4 0的圓形通孔4 6 。筆頭40可藉由粘膠固定在外殼10的容置空間12上。筆 頭40的材料可選自不透光的塑膠來遮擋其他雜散光以提 高紅外光源20發射光的偵測性。當然，在其他實施方式 中，若筆頭40的材料為可透光的材料，也可在通孔46的 内壁及筆頭40的外表面上均塗上黑漆以達到遮擋其他雜 散光的目的。 [0014] 本κ施方式巾’通孔46為階梯狀的圓形通孔。通孔在 收容端42形成第一開口 丨& J 4ba該通孔46在該書寫端44形 098138319 表單編號A0101 第7頁/共18頁 0982065723-0 201117062 成第二開口46b，該第一開口46a的孔徑比第二開口 4此 的孔徑大。因此，收容端42包括形成在該通孔託内並用 於支撐會聚鏡片30的支撐面42a。支撐部34藉由粘膠固定 在該支撐面42a上即可固定會聚鏡片3〇。該書寫端44的端 面44a為弧形面以方便書寫。該紅外光源2〇發射光線，會 t鏡片30將該光線會聚並穿過該通孔46以投射至該書寫·、 端44，並經第二開口 46b出射至手寫區域以形成光點。 [0015] [0016] [0017] [0018] 為將紅外光源20固定在容置空間12内，手寫輸入光筆1〇〇 還包括光源固定部50，該光源固定部5〇包括固定罩52及 固定在該固定罩52上的支撐架54，該紅外光源2〇固定於 ^' 該固定罩52内，該固定罩52開設有與該通孔46對準並相 通的出光孔56。紅外光源20的引腳24穿設於支樓架54， 被支揮架54包覆保護。該光源固定部5〇的材料可選自塑 膠。 手寫輪入光筆100還包括一個開關16。該開關16設置在外 殼10的遠離筆頭40的一端。開關16用於控制手寫輸入光 筆100的電源與紅外光源20的電性連接的通斷。 y 請結合圖3 ’為本發明第二實施方式提供的一種光學觸控 系統200。該光學觸控系統2 00包括上述手寫輸入光筆 100、一個紅外攝像模組2〇2及一個手寫板2〇4。 该紅外攝像模組202固定於該手寫板204的一邊，該紅外 攝像模組202的攝像範圍覆蓋該手寫板2〇4的表面。紅外 攝像模組202的攝像範圍與紅外攝像模組202所使用的廣 角鏡頭及紅外攝像模組2〇2與該手寫板2〇4的表面的距離 098138319 表單蝙號A0101 第8頁/共18頁 0982065723-0 201117062 [0019] 等有關。紅外攝像模組202用於攝取手寫輸入光筆1〇〇所 發出的並在該手寫板204的表面投射形成的紅外光點的移 動軌跡並將該移動轨跡傳送至一個資訊處理裝置進行處 理及應用’該資訊處理裝置可以為個人電腦、個人數位 助理或移動通訊終端等。 由於人們在書寫時，筆通常與書寫面係傾斜的，所以當 手寫輪入光筆100用於在手寫板204上手寫輸入時，筆頭 40與手寫板204的表面傾斜接觸，因此，筆頭40不會對紅 〇 外攝像模組202偵測該紅外光點造成遮擋，並且該手寫輸 入光筆100還能提供給人們實際書寫的感覺。 [0020] 手寫輸入光筆100在工作時，書寫端44接觸於手寫板204 的表面’紅外光源2〇發出紅外光線，該紅外光線經過會 聚鏡片30的有效光學部32會聚後成為集中光束，該集中 光束穿過通孔46，並經書寫端44投射，在手寫板204内形 成該紅外光點。該紅外攝像模組2〇2偵測該紅外光點的移 動軌跡’進而實現光學觸禮輸入。 0 [0021] ...-： 可以理解，該光學觸控系統2〇〇寸以不包括手寫板204， 而可直接利用桌面等一些漫反射表面，用手寫輸入光筆 100在該漫反射表面上書寫即可❶紅外攝像模組2〇2也可 置於手寫板204外的其他一些支撐物上，該漫反射表面上 或該漫反射表面外的另一些支撐物上。 [0022] 請結合圖4，為本發明第三實施方式提供的一種光學觸控 系統300。該光學觸控系統30〇包括上述手寫輸入光筆 100、一個紅外攝像模組302及—個觸控屏3〇4 ^ 098138319 表單編號A0101 第9頁/共18頁 0982065723-0 201117062 _3] t實施方式中’該紅外攝像模組3G2設置於該觸控屏綱 的轉角處。紅外攝像單元3〇2的攝像範圍均可覆蓋整個觸 控屏304的表面。 [0024] 當手寫輸入光筆100將紅外光點投射至觸控屏3〇4的表面 時’该紅外影像單元302偵測該紅外光點的移動軌跡，之 後將該移動軌跡輸出至資訊處理裝置進行處理及應用。 [0025] 綜上所述，本發明確已符合發明專利之要件，遂依法提 出專利申請。惟，以上所述者僅為本發明之較佳實施方 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 ，如通孔46可為方形等其他形狀或通孔46為一直線的圓 形通孔’藉由將會聚鏡片30的外側表粘著於通孔46的内 表面以固定會聚鏡片30 ;或將會聚鏡片3〇的支撐部μ直 接粘貼於該收容端42的端面上而固定會聚鏡片3〇 ;紅外 光源20也可以直接利用粘膠固定在外殼1〇内而可省略上 述的光源固定部5 0等，皆應涵蓋於以下申請專利範圍内 〇 【圖式簡單說明】 [0026] 圖1為本發明第一實施方式提供的一種手寫輸入光筆的立 體示意圖。 - [0027] 圖2為圖1中手寫輸入光筆的截面放大示意圖。 [0028] 圖3為本發明第二實施方式提供的一種光學觸控系統的立 體示意圖。 [0029] 圖4為本發明第三實施方式提供的一種光學觸控系統的立 098138319 表單編號A0101 第頁/共18頁 0982065723-0 201117062 [0030] 體示意圖。 【主要元件符號說明】 手寫輸入光筆：100，200，300 [0031] 外殼：10 [0032] 紅外光源：20 [0033] 會聚鏡片：30 [0034] 筆頭：40 0 [0035] 容置空間：12 [0036] 發光體：22 ' [0037] 引腳：24 [0038] 有效光學部：32 [0039] 支撐部：34 [0040] 光學凸面：32a 〇 [0041] 光學凹面：32b [0042] 收容端：42 [0043] 支撐面：42a [0044] 書寫端：44 [0045] 端面.4 4 a [0046] 通孔：46 [0047] 第一開口 ： 46a 098138319 表單編號A0101 第11頁/共18頁 0982065723-0 201117062 [0048] 第二開口 ： 46b [0049] 光源固定部：5 0 [0050] 固定罩：5 2 [0051] 支撐架：54 [0052] 出光孔：56 [0053] 開關：16 [0054] 紅外攝像模組：202，302 [0055] 手寫板：204 [0056] 觸控屏：304 0982065723-0 098138319 表單編號A0101 第12頁/共18頁201117062 VI. Description of the Invention: [Technical Field] The present invention relates to a handwriting input light pen and an optical touch system having the same. [Previous technique #f] [0002] In an electronic device, a conventional handwriting input method is to perform writing on a display screen using a metal or plastic stylus on a display screen having a touch function, and the display screen recognizes the handwriting The writing track of the pen, in order to achieve the purpose of handwriting input. However, it is easy to make the display screen damaged by handwriting ^ input in physical contact. [0003] Currently, an emerging optical touch method has been developed. The optical touch method uses a handwriting input light pen to project a light spot in a tablet area, and uses the handwriting input light pen to write a text or a graphic to be input, and then uses a detecting device to record the track of the light spot. Handwriting input is realized by calculating a character or a figure that coincides with the movement trajectory of the spot. Since in the optical touch mode, the detecting device only records the moving track of the light spot, so that it is not necessary to make physical contact with the display screen and gradually replace the traditional handwriting input mode. Therefore, how to design a handwriting input light pen and an optical touch system having the handwriting input light pen has become an urgent problem to be solved. SUMMARY OF THE INVENTION [0004] A handwriting input light pen includes: a housing, an infrared light source, a converging lens, and a pen tip. The pen head includes a receiving end in the outer casing and a writing end opposite to the receiving end and located outside the outer casing. The pen head opens from the receiving end to the writing end through the 098138319 form number A0101. 18 pages 0982065723-0 201117062 The through hole of the pen. The concentrating lens is disposed at the receiving end. The infrared light source is located within the housing and is used to emit infrared light. The converging lens is configured to converge the infrared light such that the infrared light passes through the through hole and is projected to the writing end. [0005] An optical touch system comprising the above-described handwriting input light pen and an infrared camera module. The handwriting input stylus is used to project an infrared spot through the writing end. The infrared camera module is configured to capture a moving trajectory of the infrared spot. [0006] The handwriting input light pen and the optical touch system perform writing in the handwriting area by the writing end, and at the same time, the infrared light emitted by the light source is projected on the writing end by the convergence lens to form an infrared light spot, thereby realizing the light spot. Formed, and thus optical touch input is achieved. [Embodiment] The present invention will be further described in detail below with reference to the accompanying drawings. Referring to FIG. 1 and FIG. 2, a handwriting input light pen 100 according to a first embodiment of the present invention includes a housing 10, an infrared light source 20, a condenser lens 30, and a pen head 40. [0009] The outer casing 10 is a hollow cylindrical structure such as a cylindrical or square tubular structure. In the present embodiment, the outer casing 10 has a cylindrical structure. An accommodating space 12 is formed inside the casing 10 for accommodating the infrared light source 20 and the condensing lens 30. The material of the outer casing 10 may be selected from metal or plastic. [0010] The infrared light source 20 is an infrared light emitting diode for emitting infrared light, which improves the detectability of the light than the visible light, so as to improve the detection accuracy of the detecting device. The infrared source 20 includes an illuminator 22 and a pin 24. The illuminant 098138319 Form No. A0101 Page 6 / 18 pages 0982065723-0 201117062 [0011] 00 22 emits infrared light, the pin 24 is electrically connected to the illuminant 22 and is used for inputting the stylus pen 100 with the handwriting The power supply (not shown) is connected. The condensing lens 30 is a crescent-shaped convex lens ′ which is disposed on the light path of the infrared light source 20. The concentrating lens 30 includes an effective optical portion 32 for concentrating light and a support portion 34 located around the effective optical portion 32. The branch portion 34 is used to position the condenser lens 3G 111 in the accommodating space 12. In the present embodiment, the support portion 34 is an annular support portion surrounding the periphery of the effective optical portion 32. The effective optic portion 32 includes an optical convex surface 32a and an optical concave surface 32b opposite the optical convex surface 32a, the optical convex surface 32a being further away from the infrared light source 20 than the optical concave surface 32b. In the present embodiment, the material of the condensing lens 30 is a plastic that is easily formed. The writing head 40 is a stepped cylindrical structure. The pen tip 40 includes a receiving end 42 in the receiving space 12 of the outer casing 10 and a writing end 4.4 opposite the receiving end 42 and located outside the outer casing 10. The pen head opens a circular through hole 4 6 from the receiving end 42 to the writing end Φ4 for reading 40 each. The writing head 40 can be fixed to the accommodating space 12 of the outer casing 10 by adhesive. The material of the tip 40 can be selected from opaque plastic to block other stray light to improve the detection of the light emitted by the infrared source 20. Of course, in other embodiments, if the material of the pen tip 40 is a light transmissive material, black paint may be applied to the inner wall of the through hole 46 and the outer surface of the pen tip 40 to block other stray light. [0014] The present invention is a circular through hole having a stepped shape. The through hole forms a first opening 收容 & J 4ba at the receiving end 42. The through hole 46 is at the writing end 44 shape 098138319 Form No. A0101 Page 7 / 18 pages 0982065723-0 201117062 into a second opening 46b, the first opening The aperture of 46a is larger than the aperture of the second opening 4. Accordingly, the receiving end 42 includes a support surface 42a formed in the through hole holder for supporting the condenser lens 30. The support portion 34 is fixed to the support surface 42a by an adhesive to fix the condensing lens 3 〇. The end face 44a of the writing end 44 is curved to facilitate writing. The infrared source 2 emits light, and the t-lens 30 converges the light and passes through the through hole 46 to project to the writing end 44, and exits through the second opening 46b to the handwriting area to form a spot. [0018] [0018] [0018] In order to fix the infrared light source 20 in the accommodating space 12, the handwriting input stylus 1 〇〇 further includes a light source fixing portion 50, which includes a fixed cover 52 and a fixed In the support frame 54 of the fixed cover 52, the infrared light source 2 is fixed in the fixed cover 52. The fixed cover 52 defines a light exit hole 56 aligned with the through hole 46. The pin 24 of the infrared light source 20 is disposed through the branch frame 54 and is covered and protected by the support 54. The material of the light source fixing portion 5A may be selected from plastics. The handwriting wheel stylus 100 also includes a switch 16. The switch 16 is disposed at an end of the outer casing 10 away from the pen tip 40. The switch 16 is used to control the on and off of the electrical connection of the power source of the handwriting input stylus 100 to the infrared source 20. y Please refer to FIG. 3' as an optical touch system 200 according to a second embodiment of the present invention. The optical touch system 200 includes the handwriting input light pen 100, an infrared camera module 2〇2, and a tablet 2〇4. The infrared camera module 202 is fixed to one side of the tablet 204. The imaging range of the infrared camera module 202 covers the surface of the tablet 2〇4. The imaging range of the infrared camera module 202 and the wide-angle lens used by the infrared camera module 202 and the distance between the infrared camera module 2〇2 and the surface of the tablet 2〇4 are 098138319. Form bat number A0101 Page 8/18 pages 0982065723 -0 201117062 [0019] and so on. The infrared camera module 202 is configured to take in the movement track of the infrared light spot emitted by the handwriting input light pen 1 投射 and projected on the surface of the tablet 204 and transmit the movement track to an information processing device for processing and application. 'The information processing device can be a personal computer, a personal digital assistant or a mobile communication terminal. Since the pen is usually inclined with the writing surface when writing, when the handwriting wheel stylus 100 is used for handwriting input on the tablet 204, the pen head 40 is in oblique contact with the surface of the tablet 204, and therefore, the pen 40 does not The infrared camera module 202 detects the infrared light spot to cause occlusion, and the handwriting input light pen 100 can also provide a feeling of actual writing. [0020] When the handwriting input light pen 100 is in operation, the writing end 44 contacts the surface of the tablet 204. The infrared light source 2 emits infrared light, and the infrared light rays converge through the effective optical portion 32 of the collecting lens 30 to become a concentrated light beam. The beam passes through the through hole 46 and is projected through the writing end 44 to form the infrared spot in the tablet 204. The infrared camera module 2〇2 detects the moving trajectory of the infrared spot and further realizes an optical touch input. [0021] ...-: It can be understood that the optical touch system does not include the tablet 204, but can directly use some diffuse surface such as a desktop, and input the light pen 100 on the diffuse surface by handwriting. The infrared camera module 2〇2 can also be placed on other supports outside the tablet 204, on the diffuse surface or on other supports outside the diffuse surface. [0022] Please refer to FIG. 4, which is an optical touch system 300 according to a third embodiment of the present invention. The optical touch system 30 includes the above-mentioned handwriting input light pen 100, an infrared camera module 302, and a touch screen 3〇4 ^ 098138319 Form No. A0101 Page 9 / 18 pages 0982065723-0 201117062 _3] t implementation The 'infrared camera module 3G2 is disposed at the corner of the touch screen. The imaging range of the infrared camera unit 3〇2 can cover the entire surface of the touch panel 304. [0024] When the handwriting input light pen 100 projects the infrared light spot onto the surface of the touch screen 3〇4, the infrared image unit 302 detects the moving track of the infrared light spot, and then outputs the moving track to the information processing device. Processing and application. [0025] In summary, the present invention has indeed met the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention, such as through holes 46 may be square or other shapes or through holes 46 are straight circular through holes 'by the outer side of the condenser lens 30 The surface is adhered to the inner surface of the through hole 46 to fix the condensing lens 30; or the supporting portion μ of the condensing lens 3 直接 is directly attached to the end surface of the receiving end 42 to fix the condensing lens 3 〇; the infrared light source 20 can also be directly utilized. The adhesive is fixed in the outer casing 1 而, and the above-mentioned light source fixing portion 50 and the like can be omitted, and the invention should be included in the following patent application. [FIG. 1] FIG. 1 is a first embodiment of the present invention. A stereoscopic schematic diagram of a handwritten input light pen. 2 is a schematic enlarged cross-sectional view of the handwriting input light pen of FIG. 1. 3 is a schematic perspective view of an optical touch system according to a second embodiment of the present invention. 4 is a perspective view of an optical touch system according to a third embodiment of the present invention. 098138319 Form No. A0101 Page 18 of 18 0982065723-0 201117062 [0030] FIG. [Main component symbol description] Handwriting input pen: 100,200,300 [0031] Case: 10 [0032] Infrared source: 20 [0033] Converging lens: 30 [0034] Pen: 40 0 [0035] Housing space: 12 Luminaire: 22 ' [0037] Pin: 24 [0038] Effective optics: 32 [0039] Support: 34 [0040] Optical convex: 32a 〇 [0041] Optical concave: 32b [0042] : 42 [0043] Support surface: 42a [0044] Writing end: 44 [0045] End face. 4 4 a [0046] Through hole: 46 [0047] First opening: 46a 098138319 Form number A0101 Page 11 of 18 0982065723-0 201117062 [0048] Second opening: 46b [0049] Light source fixing part: 5 0 [0050] Fixed cover: 5 2 [0051] Support frame: 54 [0052] Light exit hole: 56 [0053] Switch: 16 [ 0054] Infrared camera module: 202,302 [0055] Tablet: 204 [0056] Touch screen: 304 0982065723-0 098138319 Form number A0101 Page 12 of 18