200832200 AOC-06-32-TW 九、發明說明： 【發明所屬之技術領域】 本發明係有關一種光學式定位輸入之方法及裝置，尤指 一種以兩感測方向交錯之位置感測器接收照射到指向件之反 射光，得知指向件兩方向之相對位置，再由處理電路計算出 指向件絕對位置之設計者。 【先前技術】 按，目前使用於筆記型電腦或個人數位助理器（Personal Digital Assistant，PDA)顯示幕之定位輸入裝置，一般為電 阻式或電容式之觸控面板，而此等觸控面板必須額外之薄膜 製程，並降低顯示面穿透率，致使其可靠度不佳；於是，光 學式之觸控面板乃逐漸發展應用，但習知之光學式觸控面 板，皆需使用某種機械式之掃瞄動作及光偵測器陣列，構造 及電路之設計複雜。 【發明内容】 本發明之主要目的，係欲解決先前技術構造及電路複雜 之問題，而具有構造及電路簡易之功效。 為達上述功效，本發明之結構特徵，係包括有： 一光源，設置於一顯示幕表面之一側； 一散光元件，相對該光源設置於顯示幕表面之一側，俾 以於顯示幕表面形成線性光束； 一指向件； 至少兩位置感測器，以感測方向交錯之態樣設置於該顯 示幕表面之側邊，用以感測出指向件至少兩方向之相對位 5-200832200 AOC-06-32-TW IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD The present invention relates to a method and apparatus for optical positioning input, and more particularly to a position sensor that is staggered by two sensing directions to receive illumination. To the reflected light of the pointing member, the relative position of the pointing member in both directions is known, and then the processing circuit calculates the designer of the absolute position of the pointing member. [Prior Art] Press, currently used in notebook computers or personal digital assistant (PDA) display screen positioning input devices, generally resistive or capacitive touch panels, and these touch panels must The additional film process and the reduction of the display surface penetration rate make it less reliable; therefore, the optical touch panel is gradually developed, but the conventional optical touch panel requires a certain mechanical type. Scanning motion and photodetector arrays are complex in construction and circuit design. SUMMARY OF THE INVENTION The main object of the present invention is to solve the problems of the prior art construction and circuit complexity, and to have the advantages of construction and circuit simplicity. In order to achieve the above effects, the structural features of the present invention include: a light source disposed on one side of a display screen surface; an astigmatism element disposed on one side of the display screen surface opposite to the display surface Forming a linear beam; a pointing member; at least two position sensors disposed on the side of the display surface in a state in which the sensing directions are staggered to sense the relative position of the pointing member in at least two directions.
200832200 AOC-06-32-TW 置；以及 一處理電路，與該位置感測器構成訊號連接關係，而計 算出指向件之絕對位置者。 【實施方式】 首先’睛參閱第一圖所示，本發明之光學式定位輸入方 法’其步驟係包括有： (a )利用如雷射二極體之光源（i 〇)及散光元件（工 5)產生線性光束（2 〇); (b)線性光束（2 〇 )以平行於顯示幕（3 〇 )表面之 方向照射，照射到如觸控筆或手指之指向件（4 〇 )而反射； (c )以至少兩感測方向交錯之位置感測器（5 〇， PSD，Position Sensing Detector)，透過成像元件（6〇)接 收照射到指向件（4 〇 )之反射光，得知指向件（4 〇 )至 少兩方向之相對位置；其中，如第二圖所示，位置感測器（5 0 )之動作原理，乃當光束射入受光部時，在光之入射位置 上產生與光能量成比例之電荷，產生之電荷則化為光電流通 過P層（P層為全面均等電阻值之電阻層），此一光電流與電 極間之距離（電阻值）成反比例分割，而分別從各電極取出； 因此，假设電極間之距離為L，總光電流為〗，被分割從電極 取出之電流為I!、I2，位置感測器之中心與光束入射位置之 距離為X，則成立I尸I (L-2X) /2L及Ih (L+2X) /2L，故 /(L+2X)，而只要求出從電極取出之電流比， 即可得知光束之入射位置（與光能量大小無關）；以及 (d )依據至少兩位置感測器（5 〇 )對指向件（4 〇 ) 之感測結果，由處理電路（7 0)依幾何原理計算出指向件 -6_200832200 AOC-06-32-TW; and a processing circuit that forms a signal connection relationship with the position sensor and calculates the absolute position of the pointing member. [Embodiment] First, as shown in the first figure, the optical positioning input method of the present invention includes the following steps: (a) using a light source (i 〇) such as a laser diode and an astigmatism element (work) 5) Produce a linear beam (2 〇); (b) A linear beam (2 〇) illuminates in a direction parallel to the surface of the display (3 〇), and is reflected by a pointing object such as a stylus or a finger (4 〇) (c) A position sensor (5 〇, Position Sensing Detector) staggered with at least two sensing directions, receiving the reflected light that is incident on the pointing member (4 〇) through the imaging element (6〇), and knowing the pointing The relative position of the piece (4 〇) in at least two directions; wherein, as shown in the second figure, the action principle of the position sensor (50) is when the light beam is incident on the light receiving portion, and the light is incident on the light incident position. The light energy is proportional to the charge, and the generated charge is converted into a photocurrent through the P layer (the P layer is a resistive layer with a comprehensive equal resistance value), and the distance between the photocurrent and the electrode (resistance value) is inversely divided, and respectively Take out from each electrode; therefore, assume the distance between the electrodes For L, the total photocurrent is 〗, the current taken out from the electrode is I!, I2, and the distance between the center of the position sensor and the incident position of the beam is X, then I corpse I (L-2X) /2L and Ih (L+2X) /2L, so /(L+2X), and as long as the current ratio taken from the electrode is obtained, the incident position of the beam (independent of the amount of light energy) can be known; and (d) according to at least The sensing result of the two-position sensor (5 〇) on the pointing member (4 〇) is calculated by the processing circuit (70) according to the geometric principle.
200832200 AOC-06-32-TW (4 0)之絕對位置者。 又，本發明之光學式定位輸入裝置，係包括有： 一諸如雷射二極體之光源（1 〇)，設置於—顯示幕（3 0)表面之一側； 一散光元件（1 5 )，相對該光源（1 〇 )設置於顯示 幕（3 0)表面之一側，俾以於顯示幕（3 〇)表商形成線 性光束（2 0); 一指向件（4 0 )，如觸控筆或手指； 夕、兩位置感測器（5 〇 )，以感測方向交錯之態樣設 置於該顯示幕（3 〇)表面之側邊，另於感測路徑加=有= 像元件（6 0 )，肖以感測出指向件（4 〇 )至少兩方 對位置；以及 一處理電路（7 0 )，與該位置感測器（5 0 )構成訊 號連接關係，而計算出指向件（4())之絕對位置者。200832200 AOC-06-32-TW (4 0) absolute position. Moreover, the optical positioning input device of the present invention comprises: a light source (1 〇) such as a laser diode, disposed on one side of the surface of the display screen (30); an astigmatism element (15) Relative to the light source (1 〇) disposed on one side of the surface of the display screen (30), 俾 forming a linear beam (2 0) for the display screen (3 〇); a pointing member (4 0 ), such as a touch The pen or the finger; the two-position sensor (5 〇) is placed on the side of the surface of the display screen (3 〇) in the direction in which the sensing direction is staggered, and is added to the sensing path plus = image element (6 0 ), Shaw senses at least two pairs of pointing parts (4 〇); and a processing circuit (7 0 ), which forms a signal connection relationship with the position sensor (5 0 ), and calculates a pointing direction The absolute position of the piece (4()).
基於如是之構成，本發明之光學式定位輸入裝置，完全 Ϊ機械動m單之位置感财式，且不需複雜之訊號 處理電路，而可内建或外加於資訊電子產品顯示幕，亦不受 尺寸^小之限制；是以，本發明具有構造及電路簡易之功效。 「、“上所述’本發明所揭示之技術手段，確具「新賴性」、 • V 1±」及可供產業利用」等發明專利要件，祈請鈞 局惠賜專利，以勵發明，無任德感。 Γ上述所揭露之圖式、朗，僅為本發明之較佳實施 例’大凡熟悉此項技蓺人+， 等效變化，仍應包括本案中請^範所作之修飾或 -7 -Based on the configuration, the optical positioning input device of the present invention completely embodies the mechanical position of the mechanical movement, and does not require a complicated signal processing circuit, and can be built in or added to the display screen of the information electronic product, nor It is limited by the size of the small size; therefore, the invention has the functions of simple structure and circuit. "The above-mentioned technical means disclosed in the present invention have the invention patent requirements such as "new dependence", "V 1±" and available for industrial use, and pray for the patent to encourage the invention. There is no sense of morality. The above-disclosed drawings and lang are only preferred embodiments of the present invention. 'Family familiar with this technology + equivalent change, and should still include the modification or -7 of the case in this case.
200832200 AOC-06-32-TW 【圖式簡單說明】 第一圖係本發明之結構說明圖。 第二圖係位置感測器之動作原理說明圖。 【主要元件符號說明】 (10)光源 (15)散光元件 (2 0)線性光束 (3 0)顯示幕 (4 0)指向件 (5 0)位置感測器 (6 0)成像元件 (7 0)處理電路200832200 AOC-06-32-TW [Simple description of the drawings] The first figure is a structural explanatory diagram of the present invention. The second figure is an explanatory diagram of the action principle of the position sensor. [Main component symbol description] (10) Light source (15) Astigmatic component (20) Linear beam (30) Display screen (40) Pointer (50) Position sensor (60) Imaging component (7 0 Processing circuit
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