201128461 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明是有關於一種電磁輸入筆方法，特別是有關於一 種電磁輸入筆之傾斜角偵測方法。 【先前技術】 [0002] 目前電磁式輸入筆之傾斜角偵測方式例如美國專利 5, 751，229與5, 748, 1 1 0是由電磁筆發射訊號後，由天 線或感應線圈於接收到電磁式輸入筆的訊號後，經一系 列訊號處理包含訊號放大、濾波、整流、相位偵測與類 比數位轉換等產生電壓値與電磁式輸入筆所在位置的X或 Y座標的對應關係。當電磁式輸入筆的姿態係與天線或感 應線圈垂直時，電磁式輸入筆所在位置的天線或感應線 圈及其對應座標處電壓訊號値強度為最大，且為唯一出 現電壓訊號値的座標。但當電磁式輸入筆姿態並非與天 線或感應線圈垂直時，電磁式輸入筆所在位置鄰近的天 線或感應線圈及其對應座標處亦會有電壓訊號値出現， 但相對於電磁式輸入筆所在位置的電壓訊號値，為強度 次高的電壓訊號値。此時電磁式輸入筆的傾斜角係利用 電磁式輸入筆所在位置強度最高的電壓訊號値，即電壓 訊號値與X或Y座標關係圖主峰値（main peak value) ，與強度次高的電壓訊號値，即電壓訊號値與X或Y座標 關係圖次峰値（sub peak value)，進行函數運算後計 算出電磁式輸入筆傾斜角的角度。 [0003] 但是上述傳統電磁式輸入筆之傾斜角偵測方式，必須使 用強度最高的電壓訊號値或主峰値訊號與強度次高的電 099103407 表單編號A0101 第4頁/共16頁 0992006397-0 201128461 麗訊號値或次峰値訊號^文 度。以X軸的角度為例，卷數運算後計算出傾斜角的角 ，而X軸為0度傾斜但γ料L磁式輪入筆維持在—定高度 訊號與次峰値訊號會改變 斜角度時’ X軸的主峰値 @相對應的比例值也會有所戀 化，且主峰値訊號與次略作 ”值也1有所隻 m訊號強弱的變化不一定對笙 ，也不一定有比例上的關仫 ^ 丁寻 A t 3 關係’容易因電磁式輸入筆位置 造成主峰値訊號的變化而&伽 夏 雙化而影響傾斜角的準碟性，增加 磁式輸入筆角度上判斷的 電 & 的誤差，在運算上徒增繁瑣的判 Ο [0004] 斷0 的問題 鑑於上述傳統電料輪人筆之傾斜角偵測方式的缺點， 本發明提出—種電磁輸Μ之傾斜角_方法，以解決 傳統電磁式輸人筆傾斜_測方式判斷誤Μ運算繁項 【發明内容】201128461 VI. Description of the Invention: [Technical Field] [0001] The present invention relates to an electromagnetic input pen method, and more particularly to a method for detecting a tilt angle of an electromagnetic input pen. [Prior Art] [0002] At present, the tilt angle detection method of the electromagnetic input pen, for example, U.S. Patent Nos. 5, 751, 229 and 5, 748, 1 1 0 are received by the electromagnetic pen after being received by the antenna or the induction coil. After the signal of the electromagnetic input pen, the signal processing includes signal amplification, filtering, rectification, phase detection and analog digital conversion to generate the corresponding relationship between the voltage 値 and the X or Y coordinate of the position of the electromagnetic input pen. When the attitude of the electromagnetic input pen is perpendicular to the antenna or the induction coil, the intensity of the voltage signal 天线 at the antenna or the induction coil at the position of the electromagnetic input pen and its corresponding coordinate is the largest, and is the only coordinate at which the voltage signal 値 appears. However, when the attitude of the electromagnetic input pen is not perpendicular to the antenna or the induction coil, there will be a voltage signal 値 appearing in the antenna or induction coil adjacent to the position of the electromagnetic input pen, but relative to the position of the electromagnetic input pen. The voltage signal 値 is the second highest voltage signal. At this time, the tilt angle of the electromagnetic input pen is the highest voltage signal 値 using the position of the electromagnetic input pen, that is, the main peak value of the voltage signal 値 and the X or Y coordinate relationship, and the second highest voltage signal.値, that is, the voltage signal 値 and the X or Y coordinate relationship peak peak (sub peak value), after the function operation, calculate the angle of the electromagnetic stylus pen tilt angle. [0003] However, the tilt angle detection method of the above-mentioned conventional electromagnetic input pen must use the highest intensity voltage signal or the main peak signal and the second highest power 099103407 Form No. A0101 Page 4 / Total 16 Page 0992006397-0 201128461 Lixun 値 or the second peak 値 signal ^ Wendu. Taking the angle of the X-axis as an example, the angle of the tilt angle is calculated after the number of volumes is calculated, and the X-axis is inclined by 0 degrees, but the γ-L magnetic wheel is maintained at the constant height signal and the secondary peak signal will change the oblique angle. When the 'X-axis main peak 値 @ corresponding proportion value will also be loved, and the main peak 値 signal and the second slightly "value also has a m signal strength is not necessarily correct, not necessarily proportional On the upper part ^ Ding Xun A t 3 relationship 'easy to change the main peak 値 signal due to the position of the electromagnetic input pen & gamma doubled and affect the tilt angle of the quasi-disc, increase the magnetic input pen angle judgment The error of the electric & the cumbersome judgment in the operation [0004] The problem of the broken 0 In view of the shortcomings of the above-mentioned conventional electric wheel wheel tilt angle detection method, the present invention proposes a tilt angle of the electromagnetic transmission _ method to solve the traditional electromagnetic input pen tilt _ test method to determine the erroneous operation complex [invention content]
[0005] G 本發明的目的在於提出—種電磁輪人筆之傾斜角债測方 法’利用_電磁式輸人筆所在位置兩側訊號強度並取 樣兩側訊號峰値的方式進行函數運算，並由計算結果去 判斷電磁式輸入筆的傾斜角度。如此可以不受到所在位 置訊號主峰値的變化而影響傾斜角的準確性，減少電磁 式輸入筆角度上判斷的誤差。 [0006] 根據上述的目的，本發明提出一種電磁輸入筆之傾斜角 偵測方法，此電磁輸入筆之傾斜角偵測方法包含以下步 驟。首先提供一電磁輪入筆在Χ/Υ轴天線x /γ上方^ η η ^ 著以天線Xn/Yn為中心點兩侧各掃描a天線數。然後根據 掃描訊號及掃描的a天線數分析天線X n / γ n中心點與兩侧 099103407 表單編號Α0101 第5頁/共16頁 0992006397-0 201128461 主要訊號分佈。接著決定兩側所需取樣的天線數目。然 後根據取樣的天線數目開啟兩側所需的天線糊取電磁筆 的訊號。最後根據兩侧天線取樣訊號判斷該電磁輸入筆 之一傾斜角。 【實施方式】 [0007] 本發明的一些實施例將詳細描述如下。然而，除了如下 描述外，本發明還可以廣泛地在其他的實施例施行’且 本發明的範圍並不受實施例之限定，其以之後的專利範 圍為準。再者，為提供更清楚的描述及更易理解本發明 r * ，圖式内各部分並沒有依照其相對尺寸繪圖，某些尺寸 與其他相關尺度相比已經被誇張；不相關之細節部分也 未完全繪出，以求圖式的簡潔。 [0008] 第一圖顯示本發明一實施例之一電磁感應輸入系統。電 磁感應輸入系統包含一電磁感應控制基板102與一電磁輸 入筆（stylus) 106。電磁感應控制基板102包含含複數 沿X與Y方向排列彼此平行部分重疊由導體或感應線圈構 成的天線區104與控制元件（未圖示）。控制元件包含處 、 理單元例如微控制器（Micro-controller Unit，MCU )與相關訊號遽波（f i 1 ter )、訊號放大（amp 1 i f i er )、天線開關（switch)、相位摘測（phase detector) 、 類比數位轉換 （a/D converter) 等訊號處理電 路。電磁輸入筆106包含一共振電路（resonance circuit) 。電磁輸入筆 i〇6 的座標係藉由電磁輸入筆 i〇6 内 共振電路與電磁感應控制基板102上之感應線圈之間的電 磁波傳送與接收而獲得。 099103407 表單編號A0101 第6頁/共16頁 0992006397-0 201128461 [0009] 望— —圖顯不電礙式輸入筆於電磁感應輸入系統的天線區 (X 〜γ \ n~8 n + 8)傾斜一角度的示意圖。於第二圖中，當電 弋輸入筆垂直於電磁感應輸入系統的天線區時定義為 ' 0〇,向右邊傾倒至平行於天線區時為90。，向左邊傾倒至 平行於天線區時為-90°。 [0010] 第：ISI 筋-达 一 肩不為經由電磁式輸入系統的天線區所擷取到的X #電壓訊號與座標示意圖。其中橫轴為X軸的天線數，縱 為^壓號的強度’及訊號主峰値與兩侧訊號次鋒値 〇 訊號刀布圖。γ軸訊號也是如此ό以下說明都是以X軸 錢為主。並延伸至γ_訊號。 []β電磁式輸入筆軸天線、上方，以、為中心點兩側各 掃私複數個天線數，由各個天線所掃描出來的訊號強弱 及掃描的天線數去分析出複數個主要的訊號分布。因為 電磁感應的訊號分布有對稱性，兩側峰値在做訊號取樣 時’可以應用相對應的天線做取樣，而使用相對應的天 線數取樣時’當筆有傾斜時或是提高時，其兩側峰値比 例變化是一致的，並不受到主峰値訊號強弱而造成傾斜 角度的誤差。而兩側次峰値訊號的取樣，可以是單數或 疋複數個天線讯號強度的總和。當決定好兩側次峰值訊 號的取樣的方式為單數或是複數個天線後。在進行傾斜 角偵測時’訊號取樣只要開啟決定好的天線取樣即可， 並不需要取樣主峰的訊號值。當取樣完成後，再應用其 訊號強度來進行函數運算來判斷電磁式輸入筆的傾斜角 度。 [0012] 本發明第一實施例根據第二圖與第三圖所示’當電磁輸 099103407 表單編號A0101 第7 1/共16頁 0992006397-0 201128461 入筆在X轴天線X上方，以X為中心點兩側各掃描8個天 η η 線數，左邊號掃描天線數為χ 。及右邊號掃描天線 η-1 η-8 數為X Μ。由各個天線所掃描出來的訊號強弱及掃 η+1 η+8 描的天線數去分析出3個主要的訊號分布，例如：主峰訊 號為X 、左峰訊號為X ν~χ Α、右峰訊號為 η-2 η+2 η-7 η-4 n [0013] 此實施例以複數個天線訊號強度的總和為例，左峰訊號 取樣為X 7~Χ λ的訊號強度值總和，及右峰訊號取樣為 n- 7 η-4 Χη + 4〜X 的訊號強度值總和。當決定好兩侧峰訊號的取 η + 7 樣的方式後，在進行傾斜角偵測時，兩侧峰値訊號取樣 只要開啟X 7~χ ，及又^〜叉^的天線取樣訊號即可。 η-7 η-4 η + 4 η + 7 [0014] 當取樣完成後，左峰訊號取樣為X 7〜Χ ,的訊號強度值 η-7 η-4 總和=左峰訊號值；右峰訊號取樣為X , μ ~ X , ν的訊號 η+4 η+7 強度值總和=右峰訊號值，再經過函數運算後，去判斷 傾斜角度。以下為其中的一種函數運算去判斷傾斜角度 〇 [0015] 當訊號取樣完成，已知左峰訊號值及右峰訊號值，此函 數運算以X轴兩侧峰値訊號值的比例值作為傾斜角的判斷 :當筆垂直天線區時，X軸兩侧峰値訊號值為相等； 右鋒訊號值/(右鋒訊號值+左峰訊號值）=1/2 ά角度 為0度 當筆向右邊傾倒至平行於天線區時，X軸右峰訊號值遠大 於左峰的訊號值： 右鋒訊號值/(右鋒訊號值+左峰訊號值）与1 a角度 為90度 099103407 表單編號A0101 第8頁/共16頁 0992006397-0 201128461 當筆向左邊傾倒至平行於天線區時，χ軸左峰訊號值遠大 於右峰的訊號值： 右鋒訊號值/(右鋒訊號值+左峰訊號值）与〇》角产 為-90度 ^ 右鋒訊號值/(右鋒訊號值+左峰訊號值）=比例值Β， 而比例值Β會落在〇 $比例值Β $ !之間，可以依據不 同的比例值Β對應到相對應的角度上。 [0016] Ο 以上實施例也可以用左鋒訊號值/ (右鋒訊號值+左峰訊 號值）=比例值，所得到的比例值會與上述實施例相同 ，但是所定義的傾斜方向卻是相反的。所以判斷出傾斜 角度與上述實施例差一個負號。 [0017] Ο [0018] 本發明第二實施例為當電磁輸入筆在X軸天線χ上方以 Χη為中心點兩側各掃描8個天線數，左邊號掃描天線數為 HP右邊號掃描天線數為Χη+1'+8。由各個天線 所掃描出來的訊號強弱及掃描的天線數去分析出3/(固主要 的訊號分布，例如：主峰訊號為χη_Γχη+2、左峰訊號為 Χη-7〜Χη_4、右峰訊號為Χη + 4~Χη + Γ 此實施例以單個天線訊號強度為例’左峰訊號取樣為χ ·、、、η- 5 的訊號強度，及右峰訊號取樣為χη+5的訊號強度。當決定 好兩側峰訊號的取樣的方式後’在進行傾斜角偵測時， 兩側峰値訊號取樣只要開啟Χ η - 5及Χ η + 5的天線取樣訊號即 當取樣完錢，左峰訊靜樣減強度值=左 峰訊號值；右峰祕喊為Χη+5的減姐值=右峰訊 099103407 表單編號Α0101 第9頁/共16頁 0992006397-0 [0019] 201128461 號值，再經過函數運算後，去判斷傾斜角度。以下為其 中的一種函數運算去判斷傾斜角度。 [0020] 當訊號取樣完成，已知左峰訊號值及右峰訊號值，此函 數運算以X軸兩側峰値訊號值的差值作為傾斜角的判斷： 當筆垂直天線區時，X軸兩側峰値訊號值為相等； 右鋒訊號值-左峰訊號值=0 a角度為0度 當筆向右邊傾倒至平行於天線區時，X軸右峰訊號值遠大 於左峰的訊號值： 右鋒訊號值-左峰訊號值与右峰訊號值a角度為90度 當筆向左邊傾倒至平行於天線區時，X軸左峰訊號值遠大 於右峰的訊號值： 右鋒訊號值-左峰訊號值与-左峰訊號值a角度為-90度 右鋒訊號值-左峰訊號值=差值A，而差值A會落在-左 峰訊號值S差值A S右峰訊號值之間，可以依據不同的 差值A對應到相對應的角度上。 [0021] 以上實施例也可以用左鋒訊號值-右峰訊號值=差值， 所得到的差值會與上述的實施例差一個負號。可以用一 樣的方式判斷出傾斜角度。而Y軸方向的傾斜角度可以依 照上述實施例去做判斷。 [0022] 第四圖顯示本發明電磁輸入筆之傾斜角偵測方法一實施 例之流程圖。首先，於步驟202中，將電磁輸入筆置於X/ Y軸天線X /Y上方。接著於步驟204中，以天線X /Y為 η η η η 中心點兩侧各掃描a個天線數。然後於步驟206中，根據 掃描訊號及掃描的天線數分析中央與兩侧主要訊號分佈 。接著於步驟2 08中，決定兩側所需取樣的天線數目。然 099103407 表單編號A0101 第10頁/共16頁 0992006397-0 201128461 後於步驟21G中，根據取樣的天線數目開啟兩側所需的天 線操取電磁筆的訊號。最後於步驟212中，根據兩側天線 取樣訊號判斷電磁輸入筆傾斜角。 [0023] 本發明制㈣式輸人筆所在位置㈣訊號強度並取樣 兩側訊號峰値的方式進行函數運算，並由計算結果判斷 電磁式輸入筆的傾斜角度。如此可以不受到所在位置訊 號主峰値的變化而影響傾斜角的準確性，並可減少電磁 式輸入筆角度上判斷的誤差。 Ο 上述之實施例僅係為說明本發明之技術思想及特點，其 目的在使熟悉此技藝之人士能了解本發明乏内容並據以 實施’當不能據以限定本發明之專利範圍，即凡其他未 脫離本發明所揭示精神所完成之各種等效改變或修飾都 涵蓋在本發明所揭露的範圍内，均應包含在以下之申請 專利範圍内。 【圖式簡單說明】[0005] The purpose of the present invention is to provide a method for measuring the tilt angle of a magnetic wheel pen, using the method of using the intensity of the signal on both sides of the position of the electromagnetic input pen and sampling the peaks of the two sides of the signal to perform a function operation, and The angle of inclination of the electromagnetic input pen is judged from the calculation result. In this way, the accuracy of the tilt angle can be affected without being affected by the change of the main peak of the position signal, and the error of the judgment of the angle of the electromagnetic input pen can be reduced. According to the above object, the present invention provides a method for detecting a tilt angle of an electromagnetic input pen, and the method for detecting a tilt angle of the electromagnetic input pen comprises the following steps. First, an electromagnetic wheel pen is provided above the Χ/Υ axis antenna x / γ ^ η η ^ The number of scanning a antennas on both sides of the antenna Xn/Yn is taken as the center point. Then analyze the antenna X n / γ n center point and both sides according to the scanning signal and the number of scanned a antennas. 099103407 Form No. 1010101 Page 5 of 16 0992006397-0 201128461 Main signal distribution. Then determine the number of antennas to be sampled on both sides. Then, according to the number of antennas sampled, the signal of the antenna paste electromagnetic pen required on both sides is turned on. Finally, the tilt angle of one of the electromagnetic input pens is determined according to the antenna sampling signals on both sides. [Embodiment] Some embodiments of the present invention will be described in detail below. However, the present invention may be embodied in a wide variety of other embodiments, and the scope of the present invention is not limited by the examples, which are subject to the scope of the following patents. Furthermore, in order to provide a clearer description and to more easily understand the present invention r*, the various parts of the drawing are not drawn according to their relative dimensions, and some dimensions have been exaggerated compared to other related dimensions; the unrelated details are not Completely drawn to make the schema simple. The first figure shows an electromagnetic induction input system in accordance with an embodiment of the present invention. The electromagnetic induction input system includes an electromagnetic induction control substrate 102 and an electromagnetic input stylus 106. The electromagnetic induction control substrate 102 includes an antenna region 104 and a control element (not shown) including a plurality of parallel conductors or induction coils arranged in parallel in the X and Y directions. The control component includes a processing unit, such as a microcontroller (Micro-controller unit (MCU) and related signal chopping (fi 1 ter ), signal amplification (amp 1 ifi er ), antenna switch (switch), phase extraction (phase) Signal processing circuit such as detector), analog digital conversion (a/D converter). The electromagnetic input pen 106 includes a resonance circuit. The coordinates of the electromagnetic input pen i〇6 are obtained by transmitting and receiving electromagnetic waves between the electromagnetic input pen i〇6 internal resonance circuit and the induction coil on the electromagnetic induction control substrate 102. 099103407 Form No. A0101 Page 6 of 16 0992006397-0 201128461 [0009] Looking at the antenna area of the electromagnetic induction input system (X ～ γ \ n~8 n + 8) A schematic diagram of an angle. In the second figure, when the stylus is perpendicular to the antenna area of the electromagnetic induction input system, it is defined as '0〇, which is 90 when it is tilted to the right and parallel to the antenna area. , tilted to the left to -90° parallel to the antenna area. [0010] No.: ISI rib-to-shoulder is not a schematic diagram of the X# voltage signal and coordinates captured by the antenna area of the electromagnetic input system. The horizontal axis is the number of antennas on the X-axis, and the vertical direction is the intensity of the voltage and the main peak of the signal and the signal on both sides of the signal. The same is true for the γ-axis signal. The following explanations are based on X-axis money. And extended to γ_ signal. [] β electromagnetic input pen shaft antenna, above, with , as the center point, each side sweeps a plurality of antennas, the signal strength scanned by each antenna and the number of scanned antennas analyzes a plurality of main signal distributions . Because the signal distribution of the electromagnetic induction is symmetrical, the peaks on both sides can be sampled when the signal is sampled, and the corresponding antenna is used for sampling, and when the corresponding antenna number is sampled, when the pen is tilted or raised, The change of the peak-to-peak ratio on both sides is consistent, and the error of the tilt angle is not caused by the strength of the main peak signal. The sampling of the secondary peak signals on both sides may be the sum of the singular or multiple antenna signal strengths. When the sampling of the peak signals on both sides is determined to be singular or plural. When performing tilt angle detection, the signal sampling can be performed by simply turning on the determined antenna sampling, and it is not necessary to sample the signal value of the main peak. When the sampling is completed, the signal strength is applied to perform a function operation to determine the tilt angle of the electromagnetic input pen. [0012] The first embodiment of the present invention is based on the second and third figures 'when the electromagnetic input 099103407 form number A0101 7 1 / a total of 16 pages 0992006397-0 201128461 pen in the X-axis antenna X, with X as The number of η η lines is scanned for 8 days on both sides of the center point, and the number of scanning antennas on the left side is χ . And the right-hand scanning antenna η-1 η-8 number is X Μ. The signal intensity scanned by each antenna and the number of antennas scanned by η+1 η+8 are used to analyze the three main signal distributions, for example, the main peak signal is X, the left peak signal is X ν~χ Α, and the right peak The signal is η-2 η+2 η-7 η-4 n [0013] In this embodiment, the sum of the signal strengths of the plurality of antennas is taken as an example, and the left peak signal is sampled as the sum of the signal intensity values of X 7 Χ λ, and the right The peak signal is sampled as the sum of the signal strength values of n-7 η-4 Χη + 4~X. When determining the η + 7-like method of the two sides of the peak signal, when performing the tilt angle detection, the sampling of the peak-to-peak signals on both sides can be performed by simply turning on the X 7~χ and the antenna sampling signals of the ^^^^ . Η-7 η-4 η + 4 η + 7 [0014] When the sampling is completed, the left peak signal is sampled as X 7~Χ, the signal intensity value η-7 η-4 sum = left peak signal value; right peak signal Sampling is X, μ ~ X, ν signal η + 4 η + 7 intensity value sum = right peak signal value, and then after the function operation, to determine the tilt angle. The following is one of the function operations to determine the tilt angle 〇[0015] When the signal sampling is completed, the left peak signal value and the right peak signal value are known. This function calculates the ratio of the peak signal value on both sides of the X axis as the tilt angle. Judgment: When the pen is in the vertical antenna area, the peak signal values on both sides of the X axis are equal; the right edge signal value / (right wing signal value + left peak signal value) = 1/2 ά angle is 0 degrees when the pen is to the right When dumping parallel to the antenna area, the X-axis right peak signal value is much larger than the left peak signal value: Right-wing signal value / (right-wing signal value + left-peak signal value) and 1 a angle is 90 degrees 099103407 Form No. A0101 8 pages / total 16 pages 0992006397-0 201128461 When the pen is tilted to the left to parallel to the antenna area, the value of the left peak signal of the axis is much larger than the signal value of the right peak: Right signal value / (right signal value + left peak signal) Value) and 〇" angle production is -90 degrees ^ right wing signal value / (right wing signal value + left peak signal value) = proportional value Β, and the proportional value Β will fall between 〇 $ proportional value Β $ ! It can be corresponding to different angles according to different scale values. [0016] Ο The above embodiment can also use the left front signal value / (right edge signal value + left peak signal value) = proportional value, the obtained ratio value will be the same as the above embodiment, but the defined tilt direction is The opposite of. Therefore, it is judged that the tilt angle is a minus sign from the above embodiment. [0018] The second embodiment of the present invention is to scan 8 antennas on both sides of the X-axis antenna Χ above the X-axis antenna ,, and the number of scanning antennas on the left is the number of HP right-number scanning antennas. It is +1η+1'+8. The signal strength and the number of antennas scanned by each antenna are analyzed to analyze 3/(the main signal distribution, for example, the main peak signal is χη_Γχη+2, the left peak signal is Χη-7~Χη_4, and the right peak signal is Χη + 4~Χη + Γ In this example, the single antenna signal strength is taken as an example. The left peak signal is sampled as the signal strength of χ ·, ,, η-5, and the right peak signal is sampled as the signal strength of χη+5. After sampling the peak signal on both sides, 'when the tilt angle is detected, the peak signal sampling on both sides is as long as the antenna sampling signal of Χ η - 5 and η η + 5 is turned on. When the sample is finished, the left peak is quiet. Decrease value = left peak signal value; right peak secret is Χη+5 minus sister value = right peak news 099103407 form number Α0101 page 9 / total 16 page 0992006397-0 [0019] 201128461 value, and then through the function operation After that, the tilt angle is determined. The following is one of the function operations to determine the tilt angle. [0020] When the signal sampling is completed, the left peak signal value and the right peak signal value are known, and the function operates on the X-axis side peak signal. The difference in value is used as the judgment of the tilt angle: When the pen is in the vertical antenna area, the peak signal values on both sides of the X axis are equal; the right edge signal value - left peak signal value = 0 a angle is 0 degrees, when the pen is tilted to the right to be parallel to the antenna area, the X axis is right peak signal The value is much larger than the signal value of the left peak: the right peak signal value - the left peak signal value and the right peak signal value a angle is 90 degrees. When the pen is tilted to the left to be parallel to the antenna area, the X-axis left peak signal value is much larger than the right peak. Signal value: Right wing signal value - left peak signal value and - left peak signal value a angle is -90 degrees right edge signal value - left peak signal value = difference A, and difference A will fall on - left peak signal The value S difference AS between the right peak signal values can be corresponding to the corresponding angle according to different difference A. [0021] The above embodiment can also use the left front signal value - right peak signal value = difference, The difference obtained may be a minus sign from the above embodiment. The tilt angle can be judged in the same manner, and the tilt angle in the Y-axis direction can be judged according to the above embodiment. [0022] The fourth figure shows the present invention. A flowchart of an embodiment of a method for detecting a tilt angle of an electromagnetic input pen. First, in step 202, The electromagnetic input pen is placed above the X/Y axis antenna X / Y. Then, in step 204, the number of antennas is scanned on both sides of the center point of the antenna X / Y as η η η η. Then in step 206, according to Scan the signal and the number of scanned antennas to analyze the distribution of the main signals on the center and both sides. Then in step 2 08, determine the number of antennas to be sampled on both sides. However, 099103407 Form No. A0101 Page 10 / Total 16 Pages 0992006397-0 201128461 In step 21G, the signals required to operate the electromagnetic pen on both sides are turned on according to the number of antennas sampled. Finally, in step 212, the tilt angle of the electromagnetic input pen is determined according to the sampling signals of the antennas on both sides. [0023] The method of the fourth type of the input pen of the invention (4) is to perform a function operation on the signal intensity and sample the signal peaks on both sides, and the inclination angle of the electromagnetic input pen is judged by the calculation result. In this way, the accuracy of the tilt angle can be affected without being affected by the change of the main peak of the position signal, and the error of the judgment of the angle of the electromagnetic input pen can be reduced. The above embodiments are merely illustrative of the technical spirit and characteristics of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the patent scope of the present invention. Other equivalents and modifications may be made without departing from the spirit and scope of the invention, and are intended to be included within the scope of the invention. [Simple description of the map]
[0024] G 第一圖顯示本發明一實施例之一電磁感應輸入系統。 第二圖顯示電磁式輸入筆於電磁感應輸入系統的天線區 (Xn_8〜Xn+8)傾斜一角度的示意圖。 第三圖顯示為經由電磁式輸入系統的天線區所擷取到的X 轴電壓訊號與座標示意圖。 第四圖顯示本發明電磁輸入筆之傾斜角偵測方法一實施 例之流程圖。 【主要元件符號說明】 [0025] 102電磁感應控制基板 104天線區 099103407 表單編號A0101 第11頁/共16頁 0992006397-0 201128461 ) 106電磁輸入筆 202電磁輸入筆在X/Y軸天線X /Y上方。 η η 204以X /Υ為中心點兩侧各掃描a個天線數 η η 2 0 6根據掃描訊號及掃描的天線數分析中央與兩侧主要訊 號分佈 208決定兩側所需取樣的天線數目 21 0根據取樣的天線數目開啟兩侧所需的天線擷取電磁筆 的訊號 212根據兩侧天線取樣訊號判斷電磁輸入筆傾斜角 099103407 表單編號Α0101 第12頁/共16頁 0992006397-0[0024] G The first diagram shows an electromagnetic induction input system in accordance with an embodiment of the present invention. The second figure shows a schematic diagram of the electromagnetic input pen tilted at an angle in the antenna area (Xn_8~Xn+8) of the electromagnetic induction input system. The third figure shows the X-axis voltage signal and coordinates captured by the antenna area of the electromagnetic input system. The fourth figure shows a flow chart of an embodiment of the tilt angle detecting method of the electromagnetic input pen of the present invention. [Main component symbol description] [0025] 102 electromagnetic induction control substrate 104 antenna area 099103407 Form No. A0101 Page 11 / Total 16 pages 0992006397-0 201128461 ) 106 electromagnetic input pen 202 electromagnetic input pen in X/Y axis antenna X / Y Above. η η 204 scans the number of antennas η η 2 0 on both sides of X / Υ as the center point. According to the scanning signal and the number of scanned antennas, the central and bilateral main signal distributions 208 determine the number of antennas to be sampled on both sides. 0Open the required antenna on both sides according to the number of antennas sampled. Capture the electromagnetic pen signal 212. Determine the tilt angle of the electromagnetic input pen according to the sampling signals of the two sides. 099103407 Form No. 1010101 Page 12/16 pages 0992006397-0