1333162 r 1 九 μ 、發明說明： 【發明所屬之技術領域】 本發明係關於一種以節段式外框天線板實現大尺寸 電磁感應式數位板，提供以分段式電路板架構成大尺寸 之數位板。 【先前技術】 • 傳統之電磁感應式的手寫輸入用數位板，其架構大 多由一枝電磁感應筆以及一塊手寫板所組成。而手寫板 内部，大都具有以下之電路區塊：陣列二維天線、類比 訊號放大器、訊號濾波器、計算頻率電路、以及微處理 器。 • 此類數位板内部的矩陣式天線板，目前多半採用下 列材質：材質種類為FR1或FR4的玻璃纖維板為基板， 或是採用聚酯(PET)、聚氣乙烯(PVC)、或聚笨乙烯(PS)、 塑耀·薄膜為基板，在其上鋪有X及γ軸的陣列式的天線 迴圈，此類二維陣列式天線迴圈也就決定數位板可繪圖 區的大小，典型的二維陣列式天線迴圈示意圖如第一圖 所示。當其天線佈線於印刷電路板(Prated circuit board， PCB)時，X軸天線（x〇 _ xl2)與γ軸天線（y〇 _ 會 佈線於印刷電路板不同的面以利走線，並運用導通貫孔 以利交錯。 5 一般的數位板，如果需要較大的電磁感應訊號，在 設計感應天線線圈時，多半採用增加感應迴圈的圈數， 以得到比較大的感應電流，不過這會在印刷電路板的電 路佈局的實務上產生問題’尤其當印刷電路板只是雙面 板時，單條感應天線f複繞線越多圈時就代表該天線的 迴圈中有水平偏移產生，而且每圈的偏移也不一致，這 就導致座標計算時會有比較大的誤差，除非雙面板變為 四層板或六層板’也採取複雜的導通孔設計與複雜的交 錯走線架構才能克服，但這也會讓生產電路板變得費 時’並使生產成本大幅增加》 且受限現有市面上的標準印刷電路板生產設備機 台、平面網印機、熱風烤箱機台、及油壓裁切機等生產 設備’都有尺寸上的限制，一般來說，上述設備只能用 於製造’長和寬皆小於60公分乘60公分以下的電路板， 正因如此’數位板在尺寸上也就有了一種的限制，無法 超越生產用機台的最大工作尺寸。 傳統作法上’想作出尺寸大於60公分乘60公分手 寫數位板’基本上就是採用多塊中小尺寸的印刷電路， 以水平方式彼此相連接的方式來連成一大片的電路板。 不過’此方法有其缺點，即材料的成本會隨長度的平方 成正比’一片長度是120公分乘以120公分的電路板， 其成本是60公分乘6〇公分電路板的4倍。且隨著數位 1333162 板的尺寸越大，天線迴圈的數量越多，即所需的多工器 也越多，由於多工器皆由微處理器直接控制，所以當天 線迴圈、多工器越多，其線路走線與設計也變得複雜， ^ 也會導致生產電路板變得費時。 * 【發明内容】 本發明克服了前述傳統之大尺寸手寫數位板製程上 與線路複雜度問題的缺點。本發明為一種以節段式外框 • 天線板貫現大尺寸電磁感應式數位板，其利用具有分段 式之電路板架構，可減少印刷電路板的使用面積，且可 無限擴充數位板面積，並有效降低成本。 為達成上述目的，本發明之以節段式外框天線板實 現大尺寸電磁感應式數位板包含一或多個天線折返板、 一或多個天線多工器板、一實體天線網、以及一主控制 板。 天線折返板提供多個焊接點供電線做折返之用，並 使單根電線轉變成一封閉迴圈，天線多工器板佈有等間 距的焊接點、邏輯電路、陣列天線選擇電路、多個多工 器、以及感應電流輸出入電路。實體天線網係以單心或 多心的電線依固定的方式，在天線折返板與天線多工器 板間，以等間距排成二維陣列天線。主控制板則具有大 部分的主要控制電路與微處理器。 7 本發明之大尺寸電磁感應式數位板中之一或多個天 線折返板、一或多個天線多工器板、實體天線網、及主 控制板，彼此間係以連接器、直接焊錫、或壓合方式導 通相連。 其中，本發明之大尺寸電磁感應式數位板令每塊天 線折返板上的電路佈局都一樣，所以天線折返板可不拘 順序地串聯排列；同樣地，每塊天線多工器板上的電路 佈局也都一樣，所以天線多工器板也可不拘順序地串聯 排列。而單一的天線折返板與天線多工器板其長度剛好 等於數位板書寫區寬度或長度的整數倍分之一，因此天 線折返板與天線多工器板可對應串聯成一長尺寸的天線‘ 板，不用受限於生產設備機台以及相關的生產設備尺寸 上的限制。並且天線多工器板上係以邏輯電路結合多個 多工器來貫現多工器陣列天線選擇電路，如此可適當地 減少控制板之線路佈局，以降低成本。 茲配合下列圖示、實施例之詳細說明及申請專利範 圍，將上述及本發明之其他目的與優點詳述於後。 實施方式】 第-圖為本發明之以節段式外框天線板實現大尺寸 電磁感應式數位板的-個示意I參考k圖，本發明 之大尺寸電磁感應式數位板201包含一或多個天線折返 板205、一或多個天線多工器板2〇7、一實體天線網2〇3、 及一主控制板209。 此一或多個天線#返板205主要提供多個焊接點， 以讓電線做折返之用途，並使單根電線轉變成一封閉迴 圈，使電磁感應電流得以正確產生。而一或多個天線多 工器207板除了佈有與天線折返板205之焊接點等間距 的多個焊接點供電線做定位之用外，更備有邏輯電路、 陣列天線選擇電路、感應電流輸出/輸入電路、及多個多 工器。 實體天線網203則是以單心或多心的電線依固定的 方式，在每一天線折返板205與天線多工器板207間， 以等間距排列；而一或多個天線折返板205與天線多工 器板207對稱分佈於實體天線網203四周，以組合成二 維的陣列天線，用以感應電磁筆之電磁場；而主控制板 209接收並放大處理感應電流訊號，以實現節段式外框 天線板之大尺寸電磁感應式數位板201 〇 不失一般性，主控制板備有主要的控制電路以及微 處理器(micro-pr〇cessor)。主控制板更可以依照設計者要 求’包含以下之週邊電路與功能：類比訊號放大器電路、 訊號濾波器電路、計算頻率電路、動態記憶體、快閃記 憶體、USB串列輸出入介面、so/MMC記憶卡插槽。主 控制板除了具有大部分主要的控制電路，並具有阻抗匹 配的電路能良好的接收來自二維陣列天線所接收到的感 應電流訊號。 本發明之大尺寸電磁感應式數位板中之一或多個天 線折返板、一或多個天線多工器板、實體天線網、及主 控制板’係以連接器、直接焊錫、或壓合方式導通相連。 因此，藉由串聯對應之天線折返板與天線多工器板，且 實體天線網之天線係可以實際之電線拉線，亦不受印刷 電路板的限制，如此，即可拼湊出大面積之電磁感應式 數位板。 由於，多工器是用於控制實體天線網2〇3之二維陣 列天線中，其某一條天線的使用與否；亦即多工器是介 於二維陣列天線與訊號放大器之間，做為導通或斷開的 控制閥。本發明將大尺寸電磁感應式數位板2〇1所需要 的多工器加以分組後適當地分配到此一或多個之天線多 工器板207上。當以等量分配方式分配多工器至一或多 個之天線多工器板207上，如此每塊天線多工器板之電 路佈局相同，亦此一或多個天線多工器板2〇7則具有重 複利用的特性，即可重複的、不拘順序、串聯排列出大 面積的感應天線範圍。 舉例來說，一個大尺寸電磁感應式數位板，其x轴 有160個天線迴圈，若一個多工器具有8個1/〇通道， 則代表X軸需要20個多工器。當此20個多工器分配在 10塊天線多工器板上時，則表示每塊天線多工器板上有 2個多工器，第三圖為備有2個多工器303、304以及相 關的邏輯電路之天線多工器板之線路圖的一個工作範 例0 此10塊天線多工器板在印刷電路板上實作電路佈 局’將此每塊天線多工器板上2個多工器的I/O通道， 伕照所配置的天線焊接點作等分式配置，則此10塊天線 多工器板係具有相同之電路佈局。 天線焊接點的間距可利用以下之公式來計算： 焊接點間距=天線迴圈的寬度/迴圈等分常數。 而上述的迴圈等分常數亦決定了每個天線迴圈會被 幾等分，且也同時決定了單軸方向的天線總數=(工作 區長度/焊接點間距）+ 2» 天線多工器板上的焊接點與多工器依照上述的公式 作等分式地配置，則可以使此1〇塊天線多工器板具有重 複利用的特性’即此相同的10塊天線多工器板可不拘順 序地串聯出大面積的感應天線範圍。 第四圖為主控制板控制一天線多工器板以接收訊號 的一個示意圖。參考第四圖，主控制板209上的微處理 器209a更包括3條控制訊號線401 · 403以及位址訊號 線(AO - A2)藉以控制一天線多工器板207，而此天線多 工器板207上包括一邏輯電路207a、兩個3對8多工器（多 工器l(207b)與多工器2(207c))、一陣列天線選擇電路 207d。 主控制板之3條控制訊號線（X轴/Y軸選擇控制訊號 線40卜多工器選擇控制訊號線402、及模組選擇控制訊 號線403)連接至天線多工器板207上之邏輯電路207a上 (邏輯電路包括反或邏輯閘(NOR Gate)或反及邏輯閘 (NAND Gate))。其中，X軸/Ύ軸選擇控制訊號線401控 制天線多工器板207選擇X軸或Y軸方向的天線；多工 器選擇控制訊號線402則是用來選擇此天線多工器板 207上的多工器2〇7b、2〇7c，而任一時間只有一個多工 器被選擇；模組選擇控制訊號線403係用來控制是否選 擇此塊天線多工器板207。然後邏輯電路207a接受主控 制板上209的微處理器209a之控制訊號後，送出一控制 訊號404至被選上的多工器（多工器l(207b)或多工器 2(207c))。 主控制板209之位址訊號線(AO - A2)係用來控制此 天線多工器板207上的多工器(207b、207c)位址，由於此 天線多工器板207上的多工器係3對8之多工器，所以 主控制板209根據三條位址訊號線(AO - A2)控制多工 器(207b、207c)，多£器(207b、207c)再藉由陣列天線選 擇電路207d可選擇實體天線網203令X轴或Y轴中的 其中一條天線，被選擇到的天線接收外部電磁感應筆的 電磁場變化而產生感應電流訊號後，將此感應電流訊號 405透過此天線多工器板207回傳給主控制板209作訊 號放大以及訊號處理等後續動作。其中，多工器l(2〇7b) 與多工器2(207c)的位址訊號線(AO - A2)是共用的。 進一步說明的是，天線多工器板207上僅有被動的 夕個多工器’並沒有微處理器209a或是控制器(controller) 的存在，因此，實體天線網203上每一條天線的開啟及 關閉等動作，可由主控制板209發出命令，再經由控制 訊號線401 - 403把命令傳導到天線多工器板2〇7上。由 於天線多工器板207上具有邏輯電路2〇7a結合多個多工 器(207b、207c)來實現陣列天線選擇電路207d ’如此可 適當地減少主控制板209上輸出入腳位及控制線之電路 佈局，可降低成本、降低訊號雜訊，以及增加可數位板 可書寫空間等優點》 而實體天線網203中的天線感應迴圈的導通與否完 全由天線多工器扳207上的多工器及邏輯選擇電路做控 制，每次只會有一根天線被選擇到可以形成完整的封閉 迴圈，其餘皆如同斷路無法產生感應電流，所以每一個 感應迴圈相對於其他的感應迴圈皆為獨立存在，並不會 爻到其他感應迴圈的午擾。更由於每個天線感應迴圈的 長度、大小及圈數都相同，所以感應訊號的大小及品質 可被適當的控制》 大尺寸感應式之數位板中串聯的天線多工器板，其 除了可選擇實體天線網中的感應天線外，也負責將訊號 向前延伸傳遞，亦即每塊天線多工器板如同一小段訊號 排線，可將控制器板發出的控制訊號傳遞至下一塊天線 多工器板；同時，實體天線網中天線所產生的感應電流 訊號，也是透過相鄰的天線多工器板做為中介，傳遞感 應電流訊號至主控制板上的類比放大電路。 如第三圖之範例，當天線多工器板207上的焊接點 間距已經決定了，則天線折返板205上的焊接點間距與 焊接點數目，則如同上述之天線多工器板207上的焊接 點一樣作等分式地配置。第五圖為一範例，說明一天線 折返板之焊接點與電路佈局時形成多個Γ)型迴轉線路的 一個示意圊。參考第五圖，此天線折返板上備有16個焊 接點SI - S16、及8個门型的迴轉線路z〇 _ Z7,其中， 此8個门型的迴轉線路Z0 - Z7係分別連接於此16個 1333162 焊接點SI - S 16兩端。 此8個门型的迴轉線路ZO - Z7係讓感應式之數位 板上的天線在轉折處能保持垂直，以避免彼此天線間電 磁信號的干擾。例如，當2根長直天線與门型的迴轉線 路Z0兩端的焊接點SI ' S2相連時，迴轉線路Z0會讓 此2根長直天線保持垂直’並形成一门型的天線。 而天線折返板205與天線多工器板207 —樣，其長 度剛好等於數位板書寫區寬度（或長度）的整數倍分之 一’所以可利用相同的天線折返板205搭配天線多工器 板207串聯起來成為一個大尺寸感應式之數位板。 第六圖為另一範例，說明兩相鄰的天線轉折板，其 彼此預留焊接點，以利將截斷的天線連接起來的一個示 意圖。參考第六圖，此相鄰的兩天線轉折板205、205’ 在天線截斷處正反面各備有4個焊接點(205a - 205d、 205’a - 205’d)(其中，轉折板205、205’反面之天線截斷處 的4個銲接點，未顯示於第六圖中如此兩天線轉折板 205、205’即可透過焊錫或壓合方式將彼此連接起來。 同樣地，在每塊天線多工器板207之天線被裁斷的 位置預留焊接點，方便把相鄰的天線多工器板207被截 斷的天線連接起來，以利訊號傳遞。因此，天線多工器 15 板207也同天線轉折板205，在天線裁斷處預留焊接點， 以利兩相鄰的天線多工器板2〇7連接。 第七圖為以節段式外框天線板實現大尺寸電磁感應 式數位板結構中，天螓轉折板與天線多工器板相對應位 置的-個示意® 參考第七圖’此大尺寸電磁感應式數 位板結構中，上方為天線轉折板2〇5，下方為天線多工 器板207，其中，此部份天線轉折板2〇5與天線多工器 板中207 ’其對應的焊接點7(U、701’的相對應位置不能 有偏差’有偏差則會導致天線(電線)偏移而使得電磁感應 式數位板的結果不理想》其中此示意圖係局部之天線轉 折板與天線多工器板在大尺寸電磁感應式數位板中相對 位置的一個範例，天線多工器板與天線轉折板上之部分· 線路佈局、1C…等，並無於此範例中呈現。 更進一步說明的是，本發明中實體天線網中的天線 本身並無材質或粗細上的限制，一般採用標準型或阻抗 較低的電線》由於，感應天線是採用真實的電線(即—種 具有絕缘外皮的電線），因此，無須受限於印刷電路板的 電路佈局’此實體天線網之天線(電線)可自在地向上推叠 配置，當某一條天線的圈數需要較多圈時，並不會因為 隨著圈數的增加而產生水平位移，更可以提升電磁感應 訊號的正確性，提高座標解析的精準度。 且用來固定實體天線網中的天線矩陣式天線板’係 可選用材質種類為FR1或FR4的玻璃纖維板為基板’或 是採用聚酯(PET)、聚氣乙烯(PVC)、或聚苯乙烯(PS)、 塑膠薄膜為基板，只要能固定實體天線網之天線(電線) 即可。 惟’以上所述者，僅為發明之最佳實施例而已，當不 能依此限定本發明實施之範圍。即大凡一本發明申請專 利範圍所作之均等變化與修飾，皆應仍屬本發明專利涵 蓋之範圍内。 【圖式簡單說明】 第圖為一不意圖’說明一種典型的二維陣列式天線迴 圈。 第一圖為一示意圖’說明本發明之以節段式外框天線板實 現大尺寸電磁感應式數位板。 第三圖為一工作範例，說明一天線多工器板之線路圖。 第四圖為主控制板控制一天線多工器板以接收訊號的一 個示意圖。 第五圖為為一範例，說明一天線折返板之焊接點與電路佈 局時形成多個门型迴轉線路的一個示意圖。 第六圖為另一範例，說明兩相鄰的天線轉折板，其彼此預 留焊接點’以利將截斷的天線連接起來的一個示意圖。 第七圖為部分天線轉折板與天線多工器板的相對應位置 的一個示意圖。 【主要元件符號說明】 201大尺寸電磁感應式數位 203實體天線網 板 205天線折返板 207、207’天線多工器板 209主控制板 207a邏輯電路 207b、207c多工器 207d陣列天線選擇電路 209a微處理器 1333162 303、304多工器 401 X軸/Y轴選擇控制訊號線 402多工器選擇控制訊號線 403模組選擇控制訊號線 405感應電流訊號 Α0-Α2位址訊號線 S1-S16焊接點 Z0-Z7门型的迴轉線路 205a-205d焊接點 205’a-205’d 焊接點 701、701’焊接點1333162 r 1 九μ, invention description: [Technical Field] The present invention relates to a large-sized electromagnetic induction type digital board realized by a segment type outer frame antenna board, and provides a large-sized structure by a segmented circuit board frame. Digital tablet. [Prior Art] • The traditional electromagnetic induction type handwriting input tablet is composed of an electromagnetic induction pen and a tablet. Inside the tablet, most of them have the following circuit blocks: array two-dimensional antenna, analog signal amplifier, signal filter, calculation frequency circuit, and microprocessor. • The matrix antenna board inside the tablet is currently made of the following materials: fiberglass board with FR1 or FR4 as the substrate, or polyester (PET), polyethylene (PVC), or polystyrene. (PS), plastic film, film as substrate, arrayed antenna loop with X and γ axis on it, such two-dimensional array antenna loop also determines the size of the tablet's drawable area, typical The schematic diagram of the two-dimensional array antenna loop is shown in the first figure. When the antenna is wired on a Prated circuit board (PCB), the X-axis antenna (x〇_xl2) and the γ-axis antenna (y〇_ will be routed on different sides of the printed circuit board to facilitate routing and use The through-holes are turned on to facilitate interleaving. 5 Generally, if a large electromagnetic induction signal is required, when designing the induction antenna coil, the number of turns of the induction loop is mostly used to obtain a relatively large induced current, but this will be There is a problem in the practicality of the circuit layout of the printed circuit board. Especially when the printed circuit board is only a double panel, the more turns of the single sensing antenna f, the horizontal offset occurs in the loop of the antenna, and each circle The offsets are also inconsistent, which leads to large errors in the calculation of the coordinates, unless the double-panel becomes a four-layer or six-layer board'. Complex tunneling design and complex interleaved wiring architecture can be overcome, but This will also make production of the board time-consuming 'and increase production costs' and limit the existing standard printed circuit board production equipment machine, flat screen printer, hot air oven Machines, and hydraulic cutting machines and other production equipment 'have size limitations. In general, the above equipment can only be used to manufacture boards with lengths and widths less than 60 cm by 60 cm. 'The digital board has a limitation on the size, which can't exceed the maximum working size of the production machine. Traditionally, 'I want to make a handwritten tablet with a size larger than 60 cm by 60 cm' is basically using multiple small and medium sizes. The printed circuits are connected in a horizontal manner to each other to form a large circuit board. However, this method has the disadvantage that the cost of the material is proportional to the square of the length. One piece is 120 cm by 120 cm. The cost of the board is 4 times that of a 60 cm by 6 cm board. And as the size of the 1333162 board is larger, the number of antenna loops is larger, that is, the more multiplexers are required. The tools are directly controlled by the microprocessor, so when the antenna is looped and the multiplexer is more, the wiring and design of the circuit become complicated, and the production circuit board becomes time-consuming. The invention overcomes the shortcomings of the above-mentioned conventional large-size handwritten tablet process and line complexity problem. The invention is a large-sized electromagnetic induction type digital board which adopts a segment type outer frame and an antenna board, and the utilization thereof has The segmented circuit board architecture can reduce the use area of the printed circuit board, and can expand the tablet area infinitely, and effectively reduce the cost. To achieve the above object, the segmented outer frame antenna board of the present invention realizes large-sized electromagnetic The inductive tablet includes one or more antenna foldback boards, one or more antenna multiplexer boards, a physical antenna net, and a main control board. The antenna foldback board provides a plurality of soldering point power supply lines for folding back, and The individual wires are converted into a closed loop, and the antenna multiplexer is provided with equally spaced solder joints, logic circuits, array antenna selection circuits, multiple multiplexers, and induced current input and output circuits. The solid antenna network is arranged in a two-dimensional array antenna at equal intervals between the antenna foldback board and the antenna multiplexer in a fixed manner by a single-core or multi-core wire. The main control board has most of the main control circuitry and microprocessor. 7 one or more antenna foldback boards, one or more antenna multiplexer boards, a solid antenna net, and a main control board of the large-sized electromagnetic induction type tablet of the present invention, which are connected by a connector, direct solder, Or press-fitted to connect. Wherein, the large-sized electromagnetic induction type digital board of the invention has the same circuit layout on each antenna returning board, so the antenna folding boards can be arranged in series without order; likewise, the circuit layout of each antenna multiplexer board The same is true, so the antenna multiplexer boards can also be arranged in series without order. The length of the single antenna foldback board and the antenna multiplexer board is exactly equal to one-off of the width or length of the writing area of the tablet, so the antenna fold board and the antenna multiplexer board can be connected in series to form a long-sized antenna board. There is no restriction on the size of the production equipment machine and the associated production equipment. Moreover, the multiplexer board is connected with a plurality of multiplexers by logic circuits to realize the multiplexer array antenna selection circuit, so that the layout of the control board can be appropriately reduced to reduce the cost. The above and other objects and advantages of the present invention will be described in detail with reference to the accompanying drawings. Embodiments of the present invention are a schematic diagram of a large-sized electromagnetic induction type tablet 201 of the present invention, which comprises one or more of the large-sized electromagnetic induction type digital board of the present invention. An antenna foldback board 205, one or more antenna multiplexer boards 2〇7, a physical antenna network 2〇3, and a main control board 209. The one or more antennas #205 are primarily provided with a plurality of solder joints for the purpose of folding the wires and converting the individual wires into a closed loop for proper electromagnetic induction current generation. The one or more antenna multiplexer 207 boards are provided with a plurality of soldering point power supply lines spaced at equal intervals from the soldering points of the antenna folding board 205, and are provided with logic circuits, array antenna selection circuits, and induced currents. Output/input circuits, and multiple multiplexers. The physical antenna network 203 is fixed in a single-core or multi-core wire, and is arranged at equal intervals between each antenna folding board 205 and the antenna multiplexer board 207; and one or more antenna folding boards 205 and The antenna multiplexer board 207 is symmetrically distributed around the solid antenna network 203 to form a two-dimensional array antenna for sensing the electromagnetic field of the electromagnetic pen; and the main control board 209 receives and amplifies the induced current signal to implement the segment type The large-sized electromagnetic induction type tablet 201 of the outer frame antenna board has no loss of generality, and the main control board is provided with a main control circuit and a microprocessor (micro-pr〇cessor). The main control board can also include the following peripheral circuits and functions according to the designer's requirements: analog signal amplifier circuit, signal filter circuit, calculation frequency circuit, dynamic memory, flash memory, USB serial input interface, so/ MMC memory card slot. In addition to the majority of the main control circuits, the main control board has an impedance matching circuit that can receive the inductive current signals received from the two-dimensional array antenna. One or more antenna foldback boards, one or more antenna multiplexer boards, a solid antenna network, and a main control board of the large-sized electromagnetic induction type tablet of the present invention are connected by a connector, direct soldering, or press-fitting The mode is connected. Therefore, by connecting the corresponding antenna folding board and the antenna multiplexer board in series, and the antenna of the physical antenna network can be drawn by the actual electric wire, and is not limited by the printed circuit board, the large-area electromagnetic can be assembled together. Inductive tablet. Because the multiplexer is used to control the two-dimensional array antenna of the physical antenna network 2〇3, the use of one of the antennas; that is, the multiplexer is between the two-dimensional array antenna and the signal amplifier, A control valve that is turned on or off. The present invention groups the multiplexers required for the large-sized electromagnetic induction type tablet 2〇1 and appropriately distributes them to the one or more antenna multiplexers 207. When the multiplexer is distributed to one or more antenna multiplexer boards 207 in an equal amount distribution manner, the circuit layout of each antenna multiplexer board is the same, and the one or more antenna multiplexer boards are also 7 has the characteristics of repeated use, which can repeat the large-area sensing antenna range in a random, unscheduled, and series arrangement. For example, a large-size electromagnetic induction tablet has 160 antenna loops on the x-axis. If a multiplexer has eight 1/〇 channels, it means that 20 multiplexers are required for the X-axis. When the 20 multiplexers are allocated on 10 antenna multiplexer boards, it means that there are 2 multiplexers on each antenna multiplexer board, and the third picture shows that there are 2 multiplexers 303 and 304. And a working example of the circuit diagram of the antenna multiplexer board of the relevant logic circuit. The 10 antenna multiplexer boards implement the circuit layout on the printed circuit board. 'This is more than 2 per multiplexer board. The I/O channel of the tool is configured in an equal manner according to the configured antenna solder joints, and the 10 antenna multiplexer boards have the same circuit layout. The spacing of the antenna solder joints can be calculated using the following formula: Solder joint pitch = width of the antenna loop / loop halving constant. The above-mentioned loop halving constant also determines that each antenna loop will be equally divided, and also determines the total number of antennas in the single-axis direction = (working area length / solder joint spacing) + 2» antenna multiplexer The solder joints on the board and the multiplexer are equally divided according to the above formula, so that the 1 〇 block antenna multiplexer board can be reused. That is, the same 10 antenna multiplexer boards can be used. A large area of the sensing antenna range is connected in series without any order. The fourth figure is a schematic diagram of the main control board controlling an antenna multiplexer board to receive signals. Referring to the fourth figure, the microprocessor 209a on the main control board 209 further includes three control signal lines 401 · 403 and an address signal line (AO - A2) for controlling an antenna multiplexer board 207, and the antenna is multiplexed. The board 207 includes a logic circuit 207a, two 3-to-8 multiplexers (multiplexer 1 (207b) and multiplexer 2 (207c)), and an array antenna selection circuit 207d. The logic of the three control signal lines (X-axis/Y-axis selection control signal line 40, multiplexer selection control signal line 402, and module selection control signal line 403) of the main control board is connected to the antenna multiplexer board 207. On circuit 207a (the logic circuit includes a NOR Gate or a NAND Gate). The X-axis/Ύ-axis selection control signal line 401 controls the antenna multiplexer board 207 to select an X-axis or Y-axis direction antenna; the multiplexer selection control signal line 402 is used to select the antenna multiplexer board 207. The multiplexers 2〇7b, 2〇7c, and only one multiplexer are selected at any one time; the module selection control signal line 403 is used to control whether or not the block antenna multiplexer board 207 is selected. Then, the logic circuit 207a receives the control signal of the microprocessor 209a on the main control board 209, and then sends a control signal 404 to the selected multiplexer (multiplexer l (207b) or multiplexer 2 (207c)) . The address signal line (AO-A2) of the main control board 209 is used to control the address of the multiplexer (207b, 207c) on the antenna multiplexer board 207 due to multiplexing on the antenna multiplexer board 207. The system is a 3-to-8 multiplexer, so the main control board 209 controls the multiplexers (207b, 207c) according to the three address signal lines (AO-A2), and the multi-processors (207b, 207c) are selected by the array antenna. The circuit 207d can select one of the X-axis or the Y-axis of the solid antenna network 203. After the selected antenna receives the electromagnetic field change of the external electromagnetic induction pen to generate an induced current signal, the induced current signal 405 is transmitted through the antenna. The tool board 207 is transmitted back to the main control board 209 for subsequent operations such as signal amplification and signal processing. Among them, the multiplexer l (2〇7b) is shared with the address signal line (AO-A2) of the multiplexer 2 (207c). It is further illustrated that there is only a passive multiplexer on the antenna multiplexer board 207 and there is no presence of the microprocessor 209a or the controller. Therefore, each antenna on the physical antenna network 203 is turned on. And the action of closing, etc., can be commanded by the main control board 209, and then transmitted to the antenna multiplexer board 2〇7 via the control signal lines 401-403. Since the antenna multiplexer board 207 has the logic circuit 2〇7a combined with the plurality of multiplexers (207b, 207c) to implement the array antenna selection circuit 207d', the output pin and the control line on the main control board 209 can be appropriately reduced. The circuit layout can reduce the cost, reduce the signal noise, and increase the writeable space of the digital tablet. The conduction of the antenna in the physical antenna network 203 is completely controlled by the antenna multiplexer 207. The tool and logic selection circuit are controlled. Only one antenna can be selected at a time to form a complete closed loop. The rest can be used as an open circuit to generate an induced current, so each inductive loop is relative to other inductive loops. For independence, it does not pick up the afternoon disturbance of other inductive loops. Moreover, since the length, size and number of turns of each antenna induction loop are the same, the size and quality of the sensing signal can be appropriately controlled. In addition to the antenna multiplexer board connected in series in the large-size inductive type tablet, In addition to the sensing antenna in the physical antenna network, it is also responsible for extending the signal forward, that is, each antenna multiplexer board is like a small signal line, which can transmit the control signal sent by the controller board to the next antenna. At the same time, the induced current signal generated by the antenna in the physical antenna network is also used as an intermediary through the adjacent antenna multiplexer board to transmit the induced current signal to the analog amplifying circuit on the main control board. As an example of the third figure, when the solder joint pitch on the antenna multiplexer board 207 has been determined, the solder joint pitch and the number of solder joints on the antenna foldback board 205 are as described above on the antenna multiplexer board 207. The solder joints are equally sized. The fifth figure is an example of a schematic diagram of a plurality of 回转-type slewing lines formed by solder joints of an antenna foldback board and circuit layout. Referring to the fifth figure, the antenna foldback board is provided with 16 solder joints SI-S16 and 8 gate type rotary lines z〇_Z7, wherein the 8 gate type rotary lines Z0-Z7 are respectively connected to These 16 1333162 solder joints are on both ends of the SI-S 16. The eight-gate rotary line ZO-Z7 allows the antennas on the inductive digital display to remain vertical at the corners to avoid interference with the electromagnetic signals between the antennas. For example, when two long straight antennas are connected to the solder joints SI ' S2 at both ends of the gate type rotary line Z0, the swing line Z0 keeps the two long straight antennas vertical 'and forms a gate type antenna. The antenna foldback board 205 is the same as the antenna multiplexer board 207, and its length is exactly equal to one-off of the integer width (or length) of the writing area of the tablet. Therefore, the same antenna foldback board 205 can be used with the antenna multiplexer board. The 207 is connected in series to form a large-sized inductive tablet. The sixth figure is another example illustrating two adjacent antenna transition plates that reserve solder joints with each other to facilitate the connection of the truncated antennas. Referring to the sixth figure, the adjacent two antenna folding plates 205, 205' are provided with four soldering points (205a - 205d, 205'a - 205'd) on the front and back sides of the antenna cutoff portion (wherein the folding plate 205, The four solder joints of the 205' reverse antenna cutoff are not shown in the sixth figure, so that the two antenna transition plates 205, 205' can be connected to each other by soldering or pressing. Similarly, in each antenna The antenna of the tool board 207 is cut at a position to reserve a soldering point, which facilitates connecting the antennas of the adjacent antenna multiplexer board 207 to be intercepted for signal transmission. Therefore, the antenna multiplexer 15 board 207 is also the same antenna. The turning board 205 reserves a soldering point at the antenna cutting point to facilitate connection of two adjacent antenna multiplexer boards 2〇7. The seventh figure shows a large-sized electromagnetic induction type digital board structure by a segment type outer frame antenna board. In the middle, the corresponding position of the scorpion turning plate and the antenna multiplexer plate is referred to the seventh figure. In this large-sized electromagnetic induction type digital board structure, the upper side is the antenna turning board 2〇5, and the lower side is the antenna multiplex. Board 207, wherein the part of the antenna turning board 2〇5 In the antenna multiplexer board, 207 'the corresponding solder joint 7 (the corresponding position of U, 701' can not be biased), the deviation of the antenna (wire) will cause the antenna (wire) to shift and the result of the electromagnetic induction tablet is not ideal. The schematic diagram is an example of the relative position of the partial antenna folding plate and the antenna multiplexer plate in the large-sized electromagnetic induction type digital board, the part of the antenna multiplexer board and the antenna turning board, the line layout, the 1C, etc. It is not shown in this example. It is further illustrated that the antenna in the physical antenna network of the present invention has no material or thickness limitation, and generally adopts a standard type or a lower impedance wire. Real wires (ie, wires with an insulating sheath), so there is no need to be limited by the circuit layout of the printed circuit board. 'The antenna (wire) of this solid antenna network can be pushed up and down freely, when a certain antenna is looped When the number needs more cycles, it will not cause horizontal displacement due to the increase of the number of turns, and it can improve the correctness of the electromagnetic induction signal and improve the accuracy of coordinate analysis. And used to fix the antenna matrix antenna board in the solid antenna network 'optional fiberglass board with material type FR1 or FR4 as the substrate' or polyester (PET), polyethylene (PVC), or poly The styrene (PS) and the plastic film are substrates, as long as the antenna (wire) of the solid antenna network can be fixed. However, the above description is only the preferred embodiment of the invention, and the implementation of the invention cannot be limited thereto. </ RTI> </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; The antenna is looped. The first figure is a schematic diagram illustrating the implementation of the segmented outer frame antenna board of the present invention to realize a large-sized electromagnetic induction type digital board. The third figure is a working example illustrating the circuit diagram of an antenna multiplexer board. The fourth figure is a schematic diagram of the main control board controlling an antenna multiplexer board to receive signals. The fifth figure is an example to illustrate a schematic diagram of forming a plurality of gate-type slewing lines when a soldering point of an antenna folding board and a circuit layout are formed. The sixth figure is another example illustrating two adjacent antenna transition plates that pre-retain solder joints to each other to facilitate the connection of the truncated antennas. The seventh figure is a schematic diagram of the corresponding positions of the partial antenna folding plate and the antenna multiplexer plate. [Main component symbol description] 201 large-sized electromagnetic induction type digital 203 physical antenna stencil 205 antenna folding board 207, 207' antenna multiplexer board 209 main control board 207a logic circuit 207b, 207c multiplexer 207d array antenna selection circuit 209a Microprocessor 1333162 303, 304 multiplexer 401 X-axis / Y-axis selection control signal line 402 multiplexer selection control signal line 403 module selection control signal line 405 induction current signal Α 0-Α 2 address signal line S1-S16 welding Point Z0-Z7 gate type rotary circuit 205a-205d solder joint 205'a-205'd solder joint 701, 701' solder joint