經濟部中央揉準局員工消费合作社印製 A7 _ _B7 五、發明説明（1 ) 〔發明所靥之技術領域〕 本發明，係有關檢出描畫筆，手指等的按壓位置之阻 抗感壓型偶極子，更詳言之，係關於在待命模式檢出按壓 阻抗板的阻抗感壓型偶極子和其下筆檢出方法。 〔習知技藝〕 已往的阻抗感壓型偶極子，係如圓9所示，一面X座 標阻抗板1 0 1和Y座標阻抗板1 0 2，甩絕緣性之點間 隔物（未圚示）等以微小間隔分開，使互相之阻抗層相對 地曼合。 該阻抗層係以均勻的阻抗體形成，因此在阻抗板之一 側電極施加座標檢出用電壓而將他側電極接地時，會在阻 抗板的各位置發生和從電極之距離成正比的電位，而形成 相同傾斜之電位梯度。 以如此構成的阻抗感壓型偶極子進行座標檢出時，首 先，根據從CPU105之控制將X側的開關103， 1 0 4閉合，在X座標阻抗板1 0 1加上電位梯度。此時 ，和A/D變換器1 0 6之輸入端子連接的開關1 0 7， 係和Y座標阻抗板1 0 2之輸出電極側連接。A7 _ _B7 printed by the Employee Consumer Cooperative of the Central Bureau of Economic Development of the Ministry of Economic Affairs 5. Description of the invention (1) [Technical field of the invention] The present invention relates to an impedance-sensing type that detects the pressing position of a paintbrush, finger, etc. The dipole, more specifically, relates to the detection of an impedance-pressure-type dipole that presses an impedance plate in standby mode and the method for detecting it. [Conventional Techniques] The previous impedance pressure-sensitive dipoles are shown in circle 9, with an X-coordinate impedance plate 101 and a Y-coordinate impedance plate 1 02, throwing away insulating point spacers (not shown) Wait at a small interval to make the impedance layers relatively together. The impedance layer is formed of a uniform impedance body. Therefore, when a voltage for coordinate detection is applied to one electrode of one side of the impedance plate and the other electrode is grounded, a potential proportional to the distance from the electrode occurs at various positions of the impedance plate , And the same gradient of potential gradient is formed. When performing coordinate detection using the impedance-pressure-type dipole thus constructed, first, the switch 103, 104 on the X side is closed under the control of the CPU 105, and a potential gradient is added to the X coordinate impedance plate 101. At this time, the switch 10 7 connected to the input terminal of the A / D converter 106 is connected to the output electrode side of the Y coordinate impedance plate 102.
此時，以描晝筆等按壓X座標阻抗板1 0 1的P點（ X，y )時，在P點之電位VP •如圖所示地設從X輸入 電極1 1 1的距離之阻抗爲x2，從X輸出電極1 1 0的 距離之阻抗爲xl時，將成爲Vccxxl + (xl+x2 )，根據以A/D變換器106讓取該電位，檢出X 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） _ 4 _ -----►--1---裝------.訂—：-----線 _一 (請先閱讀背面之注意事項再填寫本萸) 295645 B7 經濟部中央標準局貝工消費合作杜印製 五、 發明説明 2 ) 1 1 座 標 ( X ) 〇 1 接 著 > 粑 X 側 的 開 關 1 0 3 1 0 4 開 放 * 同 時 將 Y 1 側 之 開 關 1 0 8 > 1 0 9 閉 合 把 和 A / D 變 換 器 1 0 6 1 I 請 1 J 的 輸 入 端 子 連 接 之 開 關 1 0 7 連 接 在 X 座 標 阻 抗 板 先 閱 1 I 1 0 1 之 X 輸 出 電 極 1 1 0 〇 讀 背 1 之 1 在 P 點 的 電 位 V P 如 果 同 樣 地 把 從 Y 輸 入 電 極 注 寒 1 1 1 2 之 距 離 的 阻 抗 做 爲 y 2 將 從 Y 输 出 電 極 1 1 3 之 % 再 1 I 距 離 的 阻 抗 做 爲 y 1 時 將 成 爲 V C C X y 1 ( y 1 + 寫 本 1 裝 y 2 ) 根 據 以 A / D 變 換 器 1 0 6 讀 取 該 電 位 V P 而 頁 1 1 檢 出 y 座 標 ( y ) 0 1 1 如 此 地 在 座 標 檢 出 模 式 因 爲 將 在 X 座 標 阻 抗 板 1 | 1 0 1 和 Y 座 標 阻 抗 板 1 0 2 中 之 一 交 互 地 施 加 電 位 梯 度 訂 I 9 所 以 將 會 消 耗 大 的 電 力 〇 1 I 因 此 在 習 知 的 阻 抗 感 壓 型 偶 極 子 例 如 rat 圖 9 所 示 之 1 1 I 特 開 平 6 — 3 0 9 0 8 6 號 所 述 在 待 命 模 式 係 不 在 阻 抗 1 1 線 板 施 加 電 位 梯 度 而 在 判 別 爲 下 筆 之 後 再 移 行 至 座 標 檢 出 模 式 0 1 1 亦 即 在 待 命模 式 係 將 X 座 標 阻 抗 板 1 0 1 的 — 方 之 1 | 開 關 1 0 3 閉 合 開 放 他 方 的 開 關 1 0 4 把 X 座 標 阻 抗 板 1 I 1 0 1 保 持 V C C 之 電 位 另 一 方 面 > Y 座 標 阻 抗 板 1 0 2 1 1 1 係 將 開 關 1 0 8 開 放 把 開 關 1 0 9 閉 合 而 使 之 接 地 0 1 1 此 時 如 果 將 和 A / D 變 換 器 1 0 6 的 輪 入 端 子 連 接 1 1 之 開 關 1 0 7 連 接 至 X 座 標 阻 抗板 1 0 1 的 電 極 側 時 t 1 1 如 刖 所 述 地 其 输 入 端 子 之 電 位 爲 V C C 〇 1 1 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） 經濟部中央標準局貝工消費合作杜印製 A7 B7 五、發明説明（3 ) 在此，如果以描畫筆等按壓X座標阻抗板1 0 1的位 置P時，將會從其按壓點經Y座標阻抗板1 0 2，開關 1 0 9向接地側通電，在X座標阻抗板1 〇 1之電極 1 1 0的電位，亦即A/D變換器1 〇 6之輸入端子的電 位，會降低至所定之電位。 在CPU 1 〇 5 ，將比較該電位和事先設定的下筆檢 出臨限值VT ，在成爲下筆檢出臨限值VT以下時，判定 爲按壓阻抗板，而移行至前述之座標檢出模式。 〔發明所要解決之課題〕 根據下筆而降低的電位VP ，設接觸阻抗爲r時將以 VccX (yl + r) + (x2 + yl + r)表示，如圖 1 0 ( a )所示地從按壓前之電位V cc隨著接觸阻抗r的 減少而變化，在接觸阻抗r成爲最小時以電位V &安定。 因此，將下筆檢出臨限值VT ，如圖10(a)所示 地設定爲比此稍高的電位，把該值事先記憶在未圖示之 ROM，和根據下筆而降低的電位VP比較，以判定按壓 阻抗板。 但是’因爲該接觸阻抗r成爲最小時的電位VPlj，將 會根據X座標阻抗板1 〇 1和Y座標阻抗板1 〇 2之阻抗 值X 2 ’ y 1而變化，所以會受到阻抗板的咀抗層之材質 ，阻抗皮膜的厚度等之影響，而成爲每偶極子不同者。 因此’以圖1 0 ( a )設定的下筆檢出臨限值VT ， 設定其他偶極子之下筆檢出臨限值VT 1時，將會如圖 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -----.--：---裝------.訂 -------線 (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局貞工消费合作杜印製 A7 _ B7 五、發明説明（4 ) 10 (b)所示，成爲V &以下而發生不能判定阻抗板的 按壓之情況。 例如，在把阻抗層以碳形成的偶極子和以I TO (銦 錫氧化物）形成之偶極子，需要使用記憶不同的下筆檢出 臨限值VT之ROM，而有無法將ROM共用之問題。 爲了解決此問題，雖然也能考慮如圖1 〇 ( a )所示 地，將下筆檢出臨限值VT拉高至比在待命模式的電位 V cc稍低之電位做爲下筆檢出臨限值V τ 2，但是，因 爲超過下筆檢出臨限值VT 2時，接觸阻抗r比A/D變 換器1 0 6的內部阻抗等尙未降低至能忽視之程度，所以 如果以此狀態判定爲已按壓阻抗板而移行至以後之座標檢 出模式時，將發生座標檢出會受到接觸阻抗r的變化影響 之問題。 亦即，在座標檢出模式例如要檢出X座標（x<)時， 雖然如前所述，把在P點的電位VP ，如圖9所示地根據 以A/D變換器1 〇 6讀取而檢出，但是，此係以在P點 安定之接觸阻抗r ，比A/D變換器10 6的內部阻抗 R λ (1Μ至10ΜΩ)能視程度地小做爲前提者，在 Ρ點之電&VP剛超過下筆檢出臨限值乂^： 2後之接觸阻 抗r ，係成爲大的值。 此時之在A/D變換器106讀取的電位>，因 係VP xRa + (RA + r)，故當接觸阻抗成 爲不能忽視之大的值時，接觸阻抗r的變化將會顯出在讀 取之電位VP >，而成爲發生座標檢出誤差之原因》 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） :7 _ -----r-----裝------：订------線 (請先閱讀背面之注意事項再填寫本買) 經濟部中央標隼局貝工消費合作社印裝 A7 _____B7 五'發明説明（5 ) 特別係，接觸阻抗r大的期間，從外部之雜訊也會受 大的影響，而成爲檢出座標之障害。 —方面，雖然也已知以下筆檢出臨限值VT 2判定按 壓阻抗板，然後設定接觸阻抗r充份降低爲止的時間τ。 之定時器，使以後的向座標檢出模式之移行延遲者，但是 將需要充份的定時器電路而成爲高價者，具有電路也將變 成複雜之問題。 更且，至接觸阻抗充份降低爲止的時間，係根據下筆 之按壓條件而每次不同，很難一律地設定其時間T。。 結果，在圖10 (a)，下筆檢出臨限值VT ，將需 要爲以阻抗的材質，阻抗皮膜之厚度等而定的電位V π以 上，同時需要設定爲接觸阻抗r降低，其變化不影響座標 檢出時之電位V PC以下，但是因爲該電位VP1_，V ^爲每 偶極子固有的電位，所以需要把下筆檢出臨限值VT在每 偶極子設定，而使之記憶在ROM。 相反地，一旦使之記憶在ROM後，將不能對應其他 機種，而需要每次更換ROM。 爲了解決此問題，本專利申請人已申請，如圖1 1所 示地以阻抗R 1和可變阻抗R 2的分壓比，設定下筆檢出 臨限值VT的阻抗感壓型偶極子之專利（特願平7年第 6 3 5 2 7 號）。 亦即，在串聯連接的阻抗R 1 ，R2之一端施加基準 檢出電壓Vcc，將他端接地，把其中間接頭T連接在A/ D變換器114的輸入端子1丫+ 。把在中間接頭T之電 I1 裝 訂 線 (請先閲讀背面之注意事項-S-·填寫本頁) 本紙浪尺度適用中國國家梂準（CNS ) A4規格（210X297公釐） -8 - 經濟部中央標準局負工消费合作社印製 A7 ____B7_ 五、發明説明（6 ) 位做爲A/D變換器1 1 4的下筆檢出臨限值VT時，因 爲在中間接頭T之電位，係將基準檢出電壓V cc以阻抗 R1 ，R2分壓的電位，所以能夠只變更可變阻抗R2之 阻抗值R 2，而做爲任意的下筆檢出臨限值VT 。 爲了將該下筆檢出臨限值，設定成下筆的最低電 位V 以上，而且阻抗板間之接觸阻抗的變化降低至能忽 視程度時之電位V π以下的電位，將一面試驗性把重複偶 極子之下筆，一面確認偶極子的動作，而設定可變阻抗 R 2之阻抗值。亦即，調整可變阻抗R 2的阻抗值，使之 能夠檢出偶極子的按壓，而且檢出後不會顯出接觸阻抗的 變化之影響。 如此地調整的可變阻抗R 2之值，係成爲使偶極子試 驗性地按壓時，比接觸阻抗降低而安定時的接觸阻抗值 rMIN和從按壓位置Ρ /至電極之兩阻抗板的阻抗值ry ，γχ之阻抗值的和（rMIN +ry +rx )稍大之阻抗 值。 —方面，在檢出下筆的待命模式，係把可變阻抗R 2 之一端（PCHK-)做爲OFF，如圖所示地將X側阻 抗板1 1 5的電極接地，把中間接頭T之電位和根據上述 設定的下筆檢出臨限值VT比較，而判別下筆。 因此，即使阻抗感壓型偶極子的材質等不同，只要按 壓在調整時按壓之位置近傍時，將能正確地檢出偶極子的 按壓，而且在檢出後，不會顯出接阻抗r之變化的影響》 但是，爲了調整可變阻抗而按壓偶極子的位置P > ， 本纸張尺度適用中國國家揉举（CNS ) A4规格（210X2S»7公釐〉 I 裝 訂 線 (請先聞讀背面之注意事項再填寫本頁) -9 - 經濟部中央搮準局貝工消費合作社印製 A7 ___B7_ 五、發明説明（7 ) 和要實際檢出之下筆的按壓位置P不同時，將如圖1 2所 示，從按壓位置P至電極爲止之兩阻抗板的阻抗值ry / ，rx >不同，即使達到安定之接觸阻抗值ΓμΙν也不超 過下筆檢出臨限值VT ，而會發生不能檢出下筆之問題》 亦即，按壓比調整可變阻抗時按壓偶極子的位置P / 離電極較遠之按壓位置P時，將成爲ry >+rx /> r y + r x ，中間接頭T的電位會上升，而發生不能檢出 下筆之問題，反之，在按壓比調整可變阻.抗時按壓偶極子 的位置靠近電極之按壓位置P時，將變成ry ^ + r X / >ry+rx ，中間接頭T的電位會降低，而成爲 接觸阻抗r尙未充份降低時就判別爲下筆，在以後的座標 檢出，將會發生游標移動之問題。 該問題，因爲不論將下筆檢出臨限值VT如何設定， 要檢出下筆時的按壓位置P將每次不同，所以無法解決。 並且，在圖1 1所示的阻抗感壓型偶極子，設定下筆 檢出臨限值VT時使用之可變阻抗R 2 ，需要在以後檢出 下筆的待命模式和座標檢出模式，使之不會影響A/D變 換器114的輸入電壓地，將其一端（PCHK -)做爲 〇 F F，需要爲此之開關電路而電路構成變爲複雜。 本發明，係爲了解決以上的問題點而開發者，其目的 在提供能夠以簡單之構成，設定每阻抗感Μ型偶極子的下 筆檢出臨限值VTR，而且和偶極子之按壓位置Ρ無關地， 能夠以接觸阻抗充份降低的狀態判別爲下筆之阻抗感壓型 偶極子和阻抗感壓型偶極子之下筆檢出方法者。 本紙張尺度遄用中國國家橾準（CNS ) A4規格（210X297公釐） I 裝 訂 線 (請先閲讀背面之注意事項再填寫本頁) -10 - 經濟部中央揉準局負工消費合作社印製 & 5 6 45 A7 ___ B7 五、發明説明（8 ) 〔爲了解決課題之方法〕 爲了達成上述目的，申請專利範圍第1項所述之阻抗 感壓型偶極子，主要係，在具有沿X方向的兩端之2邊分 別形成有X輸入電極與X輸出電極的X座檩阻抗板，和沿 著與X方向正交之Y方向的兩端之2邊分別形成有Y輸出 電極與Y输出電極，而與X座標阻抗板以微小的絕緣空隙 重叠之Y座標阻抗板，和在待命模式，向一方的阻抗板施 加基準檢出電壓Vcc，使他方之阻抗板接地地控制，從根 據下筆而變化的阻抗板之電位檢出阻抗板的按壓之C P U 的阻抗感壓型偶極子，其特徵爲， 在一方的阻抗板之輸入電極，經由調整阻抗Rp施加 基準檢出電壓，同時將他方的阻抗板之輸出電極接地，根 據A/D變換器，比較檢出電壓施加側阻抗板的输入電極 之電位和基準檢出電壓的第1電位差VA ，與檢出電壓施 加側阻抗板之輸出電極的電位和接地側阻抗板之輸入電極 的電位之第2電位差VB ，當第2電位差VB從第1電位 差VA成爲規定的下筆檢出臨限值V TR以下時，判別爲按 壓阻抗板者。 在下筆檢出狀態按壓偶極子時，將從施加基準檢出電 壓的調整阻抗RP之一端，經由調整阻抗Rp ，檢出電壓 施加側阻抗板的输入電極•檢出電壓施加側阻抗板，在按 壓位置之接觸阻抗，接地側阻抗板的輸出電極會通電· 此時，因爲在檢出電壓施加側阻抗板的输出電極和接 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） J II 裝 訂 線 (請先閲讀背面之注意事項再填寫本頁) -11 經濟部中央樣準局負工消費合作社印製 A7 __B7 五、發明説明（9 ) 地側阻抗板之輸入電極將不通電，所以第1電位差VA係 表示根據調整阻抗RP的電壓降低，而第2電位差VB係 表示根據接觸阻抗r之電壓降低。同時，因調整阻抗值和 接觸阻抗的電流值相同，所以比較第2電位差VB和第1 電位差VA時，就能夠比較變化的接觸阻抗之阻抗值和調 整阻抗RP之阻抗值。 將調整阻抗RP的阻抗值，以接觸阻抗r之阻抗值降 至能夠忽視程度時的阻抗值（以下，稱爲接觸阻抗臨限值 rc )做爲基準地調整時，比較從第1電位差VA所定的 下筆檢出臨限值V TR和第2電位差VB ，能夠把第2電位 差VB成爲下筆檢出臨限值V TR以下時，做爲接觸阻抗r 降低至接觸阻抗臨限值r c ，而判別已按壓阻抗板。 亦即，雖然根據偶極子的按壓位置，在偶極子通電之 電流值不同，但是根據比較調整阻.抗值和接觸阻抗的電壓 降低，能夠不受按壓位置之影響而判別阻抗板之按壓。 同時，下筆檢出臨限值VTR，係如果能夠事先知道偶 極子的接觸阻抗臨限值rc時，能夠根據使用與此配合之 阻抗值rp的調整阻抗RP而設定。 申請專利範圍第2項所述之阻抗感壓型偶極子，主要 係，在具有沿Y方向的2邊分別形成有X輸入電極與X輸 出電極之X座標阻抗板，和沿著與Y方向正交的X方向之 2邊分別形成有Y輸入電極與Y輸出電極，與X座標阻抗 ，板以微小的絕緣空隙叠合之Y座標阻抗板’和在待命模 式將在一方的阻抗板施加基準檢出電壓Vcc’控制爲將他 本紙张尺度適用中國國家揉準（CNS ) A4規格（210 X 297公釐） I I I I I ^ 裝 I» n 訂 II 線 (請先閱讀背面之注意事項再填寫本頁) -12 - B7 B7 經濟部中央橾隼局員工消費合作社印製 五、發明説明（10) 方之阻抗板接地，從根據下筆而變化的阻抗板之®位，檢 出按壓阻抗板的C PU之阻抗感壓型偶極子，其特徵爲， 在一方的阻抗板之輸入電極施加基準檢出電壓，同時 將他方的阻抗板之輸出電極經由調整阻抗Rp接地，根據 A/D變換器，將檢出電壓施加側阻抗板的输出電極，和 接地側阻抗板之輸入電極與輸出電極的各電位檢出，根據 C PU，將接地側阻抗板之輸出電極的電位與接地電壓之 第1電位差VA ，和檢出電壓施加側阻抗板的输出電極之 電位與接地電壓的第1電位差VA ，和檢出電壓施加側阻 抗板之輸出電極的電位與接地側阻抗板之輸入電極的電位 之第2電位差VB比較，當第2電位差VB從第1電位差 V A成爲所定的下筆檢出臨限値V T R以下時，判別爲已按 壓阻抗板者。 在下筆檢出狀態按壓偶極子時，會從施加基準檢出電 壓的檢出電壓施加側阻抗板之輸入電極，經由檢出電壓施 加側阻抗板，在按壓位置的接觸阻抗，接地側阻抗板，接 地側阻抗板之輸出m極，調整阻抗rp而通電。 此時，因在檢出電壓施加側阻抗板的輸出電極和接地 側阻抗板之輸入電極不通電，所第1電位差vA ，係表示 根據調整阻抗Rp的電壓降低，第2電位差νΒ ，係表示 根據接觸阻抗r之電壓降低。同時，因爲調整阻抗値和接 地阻抗的電流値相等，所以比較第2電位差VB和第1電 位差VA時，能夠比較變化的接觸阻抗之阻抗値和調整阻 抗R P之阻抗値。 本紙張尺度適用中國國家標準（CNS M4規格（210X297公釐） -----"-----^-- (請先閱讀背面之注意事項再填寫本頁) 訂 線 經濟部中央標準局貝工消費合作社印製 A7 B7 五、發明説明（11 ) 從第1電位差νΑ比較所定的下筆檢出臨限値V 1^和 第2電位差VB ，當第2電位差νΒ成爲下筆檢出臨限値 v tr以下時，做爲已按壓阻抗板，則能夠直接和接觸阻抗 臨限値r。比較，而判別按壓阻抗板。 亦即，雖然根據偶極子的按壓位置，在偶極子之電流 値會不同，但是能夠根據比較調整阻抗値和接觸阻抗的電 壓下降，而不受按壓位置之影響地判別阻抗板之按壓。 再者，下筆檢出臨限値VTR，如果能事先得知偶極子 的接觸阻抗臨限値r。，將能根據使用與此配合的阻抗値 之調整阻抗RP而設定。 申請專利範圍第3項所述之阻抗感壓型偶極子，其特 徵，係調整阻抗RP爲可變阻抗者。 因調整阻抗RP爲可變阻抗，故能容易地變更調整阻 抗Rp的阻抗値r P 。因此，能夠試驗性地重複偶極子之 下策，一面確認偶極子的動作一面變更可變阻抗之阻抗値 r p ，而檢出偶極子的按壓，而且能設定在檢出後使之不 會顯出接觸阻抗變化的影響之下筆檢出臨限値VTR。 因爲並非將下筆檢出臨限値V TR，只以可變阻抗調整 ，以和串聯連接的其他阻抗之分壓比而得’到者，故將不需 要在設定下筆檢出臨限値¥^後，把前述其他阻抗從電路 切離用之開關。 申請專利範圍第4項所述之阻抗感壓型偶極子，其特 徵爲，下筆檢出臨限値和第1電位差VA相等。 因爲下筆檢出臨限値V TR和第1電位差相等，所以如 本紙乐尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ~ ' -14 - 裝 訂 線 (請先閲讀背面之注意事項再填寫本頁) 經濟部中央標隼局員工消費合作杜印製 A7 _B7 五、發明説明（12) 果使用和接觸阻抗臨限値rc相同阻抗値的調整阻抗RP 時，當第2電位差VB成爲下筆檢出臨限値V TRW下時， 接觸阻抗會變成接觸阻抗臨限値r c以下，能夠直接和接 觸阻抗臨限値r。比較，而判別阻抗板之按壓。 申請專利範圍第5項所述之阻抗感壓型偶極子，其特 徵爲，下筆檢出臨限値，係在第1電位差VA乘以比1大 的校正常數N之値者。 能夠在接觸阻抗r成爲接觸阻抗臨限値r c以下時能 判別爲下筆的下筆檢出臨限値V TR，使用1 / N之阻抗値 r P的調整阻抗RP設定，故對座標檢出電路之影響少， 在移行至座檩檢出模式後，也能道：接經由調整阻抗RP ， 在阻抗板形成電位梯度。 申請專利範圍第6項所述之阻抗感壓型偶極子之下筆 檢出方法，主要係，將X座標阻抗板和Y座標阻抗板以微 小的絕緣空隙重S，在待命模式，控制爲在一方之阻抗板 施加基準檢出電壓Vcc，而把他方的阻抗板接地，從根據 下筆而變化的阻抗板之電位檢出已按壓阻抗板的阻抗感壓 型偶極子之下筆檢出方法，其特徵爲， 在一方的阻抗板，經由調整阻抗Rp施加基準檢出電 壓，同時將他方之阻抗板接地，比較調整阻抗Rp的兩端 之電位差的第1電位差VA ，和阻抗板間之電位差的第2 電位VB ，當第2電位差Vb成爲從第1電位差Va所定 之下筆檢出臨限値V TR以下時，判別爲已按壓阻抗板者。 申請專利範圍第7項所述的阻抗感壓型偶極子之下筆 本紙張尺度適用中國國家標準（CNS ) Α4規格（21.0X297公釐） -----.--：---^------，玎------ά. (請先閲讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作杜印製 A 7 B7 五、發明説明（13) 檢出方法，主要係，將X座檫阻抗板和Y座標阻抗板以微 小的絕緣空隙重叠，在待命摸式，控制爲在一方之阻抗板 施加基準檢出電壓Vcc，而把他方的阻抗板接地，從根據 下筆而變化的阻抗板之電位檢出己按壓阻抗板的阻抗感壓 型偶極子之下筆檢出方法，其特徵爲， 在一方的阻抗板施加基準檢出電壓，同時將他方之阻 抗板經由調整阻抗Rp接地，比較調整阻抗RP的兩端之 電位差的第1電位差vA ，和阻抗板間之m位差的第2電 位差Vb，當第2電位差VB成爲從第1電位差νΑ所定 的下筆檢出臨限値V TR以下時，判別爲按壓阻抗板者。 在申請專利範圍第6項和第7項所述的阻抗感壓型偶 極子之下筆檢出方法，第2電位差VB和第1電位差VA 之比，將表示變化的接觸阻抗r之阻抗値和調整阻抗RP 的阻抗値之比。 比較從第1電位差VA所定的下筆檢出臨限値V ^和 第2電位差VB ，當第2電位差VB成爲下筆檢出臨限値 V TR以下時，做爲按壓阻抗板時，能夠直接和接觸阻抗臨 限値r c比較，而判別阻抗板之按壓。 因爲調整阻抗RP爲可變阻抗，故能變更調整阻抗 RP的阻抗値rP ，容易地設定下筆檢出臨限値VTR。 因下筆檢出臨限値VTR，係只以可變阻抗調整，並非 以和串聯連接的其他阻抗之分壓比而得者，故在設定下筆 檢出臨限値V TR後，將不需要爲了把前述其他阻抗從電路 切離用之開關。 本紙張尺度適用中國國家標準（CNS ) A4規格（2 Η) X 297公釐），c -10 -----r--^---裝-- (請先鬩讀背面之注意事項再填寫本頁) 訂 線 A7 B7 經濟部中央標隼局員工消費合作社印製 五 、發明説明 ( 14 ) 1 1 [ 實 施 例 1 以 下 ， 根 據 圖 面 說 明 本 發 明 的 實 施 例 〇 1 I 圖 1 至 圖 4 > 係 顯 示 有 關 本 發 明 的 第 1 實 施 例 之 阻 抗 請 先 閱 1 1 I 感 壓 型 偶 極 子 2 0 者 9 在 圖 1 中 9 C P U 1 內 裝 有 A / D 讀 背 面 I 1 變 換 器 2 9 該 A / D 變 換 器 9 具 有 3 個 輸 入 端 子 A D 1 9 之 注 1 I A D 2 A D 3 y 成 爲 能 夠 同 時 檢 出 各 輸 入 端 子 之 電 位 〇 事 項 1 I 再 1 | 在 C P U 1 9 具 有 5 個 輸 入 端 子 P C Η Κ 9 I X 9 % 本 1 裝 I 0 X y I Y 9 0 Y 9 在 各 輸 出 入 端 子 的 後 段 連 接 有 頁 '— | 將 此 等 端 子 和 內 部 電 路 之 連 接 切 換 的 電 子 開 關 3 7 〇 各 1 I 電 子 開 關 3 7 > 係 成 爲 根 據 C P U 1 之 控 制 個 別 地 動 作 1 1 | 9 和 C P U 1 內 的 內 部 電 路 之 連 接 能 夠 切 換 〇 訂 8 和 9 爲 X 座 標 阻 抗 板 和 Y 座 標 阻 抗 板 根 據 在 阻 抗 1 板 8 ， 9 上 印 刷 成 點 狀 的 印 刷 間 隔 物 ( 未 ΓΒΓΐ 圖 示 ) 隔 著 微 1 1 小 空 隙 9 使 形 成 互 相 均 匀 之 阻 抗 層 對 向 地 重 曼 0 1 | 如 圖 所 示 在 X 座 標 阻 抗 板 8 沿 著 X 方 向 的 兩 端 之 線 2 邊 形 成 有 X 輸 入 電 極 8 a 和 X 輸 出 電 極 8 b X 輸 入 1 1 | m 極 8 a 9 係 經 由 C P U 1 的 I X * 端 子 和 調 整 阻 抗 之 可 0 1 變 阻 抗 R P 連 接 在 P C Η Κ 端 子 9 X 輸 出 電 極 8 b 9 係 連 1 1 接 和 C P U 1 之 0 X - 端 子 〇 1 1 同 時 9 在 Y 座 檫 阻 抗 板 9 沿 Y 方 向 的 兩 端 之 2 邊 1 1 形 成 有 Y 输 入 電 極 9 a 和 Υ 输 出 電 極 9 b 9 Υ 输 入 電 極 1 | 9 a 係 連 接在 C P U 1 的 I Y - 端 子 > Y 輸 出 電 極 9 b 係 1 I 連 接 在 C P U 1 之 0 Y - 端 子 0 1 1 1 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐），^ -1 / 295645 A7 B7 五、發明説明（15 ) 如此構成的阻抗感壓型偶極子，在使用前，將在待命 模式把成爲檢出阻抗板之按壓的檢出感度之下筆檢出臨限 値V TR初始設定。 (請先调讀背面之注意事項再填寫本頁) 在把下筆檢出臨限値vTR初始設定時，使C PU 1的 各電子開關3〜7如圖1所示地動作，將CPU 1之各輸 出入端和內部電路連接。 亦即，PCHK*端子，係根據開關3和電源V cc連 接，在X座稱阻抗板8的X輸入電極8 a，經由可變阻抗 Rp施加基準檢出電壓Vcc。 同時，IX* > 0 X - ，ΙΥ·的各输出入端子，係 根據開關4 ，5，6分別連接在A/D變換器2之輸入端 子ADI ，AD2，AD3，使之檢出X座標阻抗板8的 X輸入電極8 a，X輸出電極8 b和Y座標阻抗板9的Y 輸入電極9 a之電位。 剩下的0Y_輸出入端子，係根據電子開關7和接地 端子連接，把Υ座標阻抗板9之Υ輸出電極9 b做爲 G N D電平。 經濟部中央標準局員工消費合作社印製 在本實施例，係從此狀態試驗性地按壓偶極子，一面 確認阻抗感壓型偶極子的動作，一面調整可變阻抗RP之 阻抗値rP ，設定下筆檢出臨限値VTR。 以下，參照圖2說明該下筆檢出臨限値V 〃的設定。 ’圖2爲圖1的阻抗感壓型偶極子之等效電路圖。阻抗 感壓型偶極子2 0，在未按壓偶極子時，X座標阻抗板8 爲基準檢出電壓Vcc電平，而Y座標阻抗板9 ，係成爲 本紙張尺度適用中國國家標準（〇奶）八4規格（210父297公釐）_18_ ~~~~ 經濟部中央梂準局貝工消費合作社印製 A7 _B7______ 五、發明説明（16) G N D電平。 如同圖所示，從此狀態按壓X座檩阻抗板8時，在按 壓位置，會從X座標阻抗板8向Y座標阻抗板9，有 根據接觸阻抗的變化而變化之電流i t會通電。此時，在 IX + > Ο X - ，：IY·輸出入端子，因分別連接有A/ D變換器2 ，所以忽視向此等方向流的微小電流時，在可 變阻抗RP和接觸阻抗r，將會通相等之電流i 。 因此，將其兩端的電位差分別做爲第1電位差VA ， 第2電位差V b加以比較時，將能比較可變阻抗R P之阻 抗値r p和接觸阻抗r。 從同圖可知，該第1電位差VA能從已知的基準檢出 電壓Vcc和A/D變換器2之輸入端子AD 1的電位Vi ，第2電位差VB ，能從A/D變換器2之輸入端子 AD 2和AD 3的電位V2，V3求得。 在本實施例，係將可變阻抗RP的阻抗値r P調整爲 和接觸阻抗臨限値r c相等値，根據把此時之可變阻抗 RP兩端的第1電位差VA做爲下筆檢出臨限値VTR，比 較下筆檢出臨限値V TR和第2電位差VB ，實質上，比較 接觸阻抗臨限値r和根據偶極子的按壓（以下，稱爲下筆 )變化之接觸阻抗r者。 爲了把可變阻抗RP的阻抗値rP調整爲和接觸阻抗 臨限値rc相等値，每變更可變阻抗RP的阻抗値！·。， 按壓偶極子，在第2電位差VB成爲第1電位差VA以下 時，使之判別爲檢出下筆而確認偶極子之動作。 本紙張尺度適用中國國家標準（〇奶）八4規格（21_0父297公釐）_19_ ~—一 裝 訂 線 (請先閱讀背面之注意事項再填寫本頁) 經濟部中央橾準扃貝工消費合作社印装 A7 -----Β2_ 五、發明説明（17) 可變阻抗R ρ的阻抗値r Ρ ，比接觸阻抗r之最小安 定値rMIN小時將不檢出下筆，太大時在接觸阻抗r比A /〇變換器的內部電路RA成爲能忽視程度地小之前，就 會判別爲下筆，所以接觸阻抗r的樊化將表現爲座標檢出 資料之誤差，游標會隨著接觸阻抗r的變化移動。 亦即，當確實檢出下筆，而且在檢出下筆後接觸阻抗 r的變化不影響下筆檢出後之座標檢出地判別下筆時，可 變阻抗RP的阻抗値rP ，將成爲調整成比A/D樊換器 之內部電路Ra充份小，和比最小安定値r MIN1大的接 觸阻抗臨限値r c相等値者。 再者，雖然在本實施例，係將調整阻抗RP做爲可變 阻抗，而調整第1電位差VA ，但是，也可以適當地換裝 阻抗値不同的調整阻抗RP ，調整第1電位差VA 。特別 係，在上述實施例，雖然係把偶極子之下筆試驗性地重複 而確認偶極子的動作，求得可變阻抗Rp之阻抗値rP ， 根據使其阻抗値r p變化而進行調整，但是，如果能事先 得知接觸阻抗臨限値r。時，能夠根據連接與此略相同的 阻抗値rP之調整阻抗Rp ，而不需要重複上述爲了調整 的下筆地調整。 如此地，根據將調整阻抗RP調整爲和接觸阻抗臨限 値r c相等値的_ 1之偶極子，判別下筆。 在監視下筆的待命模式，係和上述下筆檢出臨限値 V tr之初始設定時一樣，使C PU 1的各霉子開關3〜7 如圖1所示地動作，將X座檩阻抗板8做爲基準檢出電壓 ^紙浪尺度適用中國國家標準（〇吣）八4規格（210'乂297公釐）_2〇- — (請先閲讀背面之注意事項再填寫本頁) -裝. 訂 經濟部中央樣準局貝工消費合作社印製 A7 _B7___ 五、發明説明（18) V CC電平，而使Y座標阻抗板9做爲GND電平。 在此待命模式，因爲X座檫阻抗板8和Y座標阻抗板 9之間不通電，所以調整阻抗Rp兩端的電位相等，第1 電位VA爲0V。同時，0X — ，：[Υ ♦之各輸出入端子 之電位分別爲V cc和0V，而第2電位差VB爲Vcc，故 比第1電位差差大。 如圖2所示，從此狀態按壓偶極子時，兩阻抗板8， 9間的接觸位置P之接觸阻抗r，會隨著接壓變大，從無 限大急速地減少。 在該接觸阻抗變化的狀態，設電流爲it時，第1電 位差▽▲爲！·。X i t ，因阻抗値rP係調整爲和接觸阻 抗臨限値r <=相等之値，故和第1電位差VA相等的下筆 檢出臨限値V TR，能夠以r c和i t之積表示。 因此，把IX-輸入端子和οχ- ，ιγ-輸出入端 子的各電位Vi，v2，v3以A/D變換器2檢出，將以 基準檢出電壓V CC和電位V i之差得到的下筆檢出臨限値 VtR，和以v2和V3之電位差所得的第2電位差VB以 CPU1比較時，將成爲把接觸阻抗臨限値和接觸阻 抗r直接比較。 亦即，因在下筆檢出臨限値V TR和第2電位差V b ， 皆未包會阻抗板8，9的阻抗値，故按壓阻抗板之任何位 置，也能以相同條件比較。 接觸阻抗r變成接觸阻抗臨限値r <：以下時，第2電 位差VB會成爲下筆檢出臨限値V TR以下，將此時以 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）~ ---- -Z1 - 裝 訂 線 (請先閲讀背面之注意事項再填寫本頁) 經濟部中央橾準局貝工消費合作社印製 A7 __B7 五、發明説明（w) C P U 1判別爲下筆。 因此，能將下筆完全檢出，同時在判別爲下筆時，因 接觸阻抗r比A/D變換器2的內部阻抗Ra ，變成能忽 視程度地小，故其變化對於以後的在座標檢出模式之座標 檢出無影響。 以待命模式檢出下筆時，將移行至座標檢出模式，在 X座檫阻抗板8和Y座標阻抗板9交互地形成電位梯度， 而檢出按壓位置P的X，Y座標。在座棋檢出模式，將根 據電子開關3把PCHK +端子做爲OFF，把調整阻抗 Rp從阻抗板之電路切離。 圇3 ，係顯示爲了檢出X座檩，在X座標阻抗板8形 成電位梯度的狀態之阻抗感壓型偶極子。 亦即，根據電子開關4把IX_輸入端子和電源Vcc 連接，從I X_輸入端子向X座標阻抗板8的X輸入電極 8 a施加基準檢出電壓Vcc，同時把OX —輸出入端子根 據電子開關5使之接地，將X座標阻抗板8的他方之X輸 出電極8 b接地，在X座標阻抗板8形成均勻傾斜之電位 梯度。 同時，Y座標阻抗板9，係將和Y輸出電極9 b連接 的ΟΥ —輸出入端子，根據電子開關7斷開，使從和X座 標阻抗板8之接觸位置不會向Υ座標阻抗板9通電，同時 將ΙΥ +輸出入端子根據霉子開關6連接在A/D變換器 2的输入端子AD 3，而從Υ座標阻抗板9的Υ輸入電極 9 a，檢出按壓位置Ρ之電位。 ( CNS ) ( 21{)X297/>* ) _ cyy — (請先閲讀背面之注意事項再填寫本頁) .裝. 訂 經濟部中央標準局員工消費合作社印製 A7 __ B7 五、發明説明（20) 然後，從以該輸入端子AD3檢出的電位Vx ，將按 壓位置P之X座標（Vx / Vcc)以CPU 1計算而檢出 0 在檢出X座檩後，以同樣的方法檢出Y座檩。 圖4，顯示在Y座標阻抗板9形成電位梯度狀態之阻 抗感壓型偶極子。 如同圖所示，根據電子開關6 ，7的動作，在Y座標 阻抗板9之Y输入電極9 a施加基準檢出電壓Vcc，同時 將他方的Y輸出電極9 b接地，在Y座標阻抗板9形成均 匀傾斜之電位梯度。 同時，根據電子開關4 ，5的動作，把X座標阻抗板 8之X輸出電極8 b端子做爲OFF，使之不會從和Y座 標阻抗板9的接觸位置向X座標阻抗板8通電，同時把和 X輸入電極8 a連接之I X +輸出入端子連接在A/D變 換器2的輸入端子AD 1 ，而從X輸入電極8 a檢出按壓 位置P之電位。 如此地，和X座標同樣地，從在輸入端子AD 1檢出 的電位VY ，把按壓位置P之Y座標（VY/VCC)以 CPU1計算而檢出。 結束X座標，Y座標的座標檢出後，CPU1將動作 控制電子開關3〜7 ，再度成爲圖1之狀態，重複下筆檢 出。 在下筆檢出，如果第2電位差VB爲下筆檢出臨限値 V TR以下時，將能判定爲座檩檢出後也繼續把筆按壓，而 本紙張尺度適用中國國家標準（CNS > A4規格（2Γ0Χ297公釐）_ 23 裝 訂 線 (請先閲讀背面之注意Ϋ項再填寫本頁) 經濟部中央標準局員工消費合作社印製 A7 _B7__ 五、發明説明（21) 把之前剛檢出的X座標，γ座標做爲有效位置資訊，輸出 至個人電腦等上位處理裝β(未圖示）。 再者，如果此時不能判定爲下筆時，則判斷爲在座標 檢出中筆分開，而把之前剛檢出的X座標和Υ座標之位置 資訊做爲無效。 不論何種情況，一旦檢出下筆而實行座標檢出後，將 在所定時間（例如5ms e c )後，再度成爲待命模式而 重複下筆檢出。 在以上的第1實施例，雖然將第1電位差V a直接做 爲下筆檢出臨限値VTR和第2電位差VB比較，但是，也 可以如圖5所示之阻抗感壓型偶極子，把調整阻抗RP 一 的阻抗値rP / ，調整爲接觸阻抗臨限値rc之丨/N ( N爲比1大的校正常數）之阻抗値r。/N，將調整阻抗 Rp <兩端的第1電位差VA之N倍的電位差做爲下筆檢 出臨限値VTR，比較下筆檢出臨限値V TR和第2電位差 V B 。 和上述實施例一樣，如果把接觸阻抗變化的狀態之電 流做爲it時，下筆檢出臨限値Vtr，爲NXVA亦即N X r p ^ X i t ，因阻抗値rP /已調整爲接觸阻抗臨限 値r c的1 / Ν之阻抗値，結果，下筆檢出臨限値Vtr能 以l*c和ί t之積表不0 因此，將IX-輸出入端子和OX· ，IY-输出入 端子的各電位Vi，v2，V3以A/D變換器2檢出，把 基準檢出電壓Vcc和電位V i之差Ν倍所得的下筆檢出臨 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐）_ % - " I 裝 訂 線 (請先閲讀背面之注意事項再填寫本頁) 經濟部中央標準局貝工消費合作社印製 295645 A7 B7 五、發明説明（22) 限値vTR，和在▽2與乂3之m位差所得的第2電位差 vB以CPU1比較時，能夠和上述第1實施例一樣地， 把接觸阻抗臨限値rc和接觸阻抗r直接比較。 如此地將調整阻抗RP的阻抗値！·。變更爲阻抗値 r p /小之調整阻抗R p ^，也能夠比較接觸阻抗臨限値 r c和接觸阻抗r，而判別下筆。 再者，雖然在本發明，不一定要在座標檢出模式把調 整阻抗RP從阻抗板8，9的電路切離，但是如本第2實 施例把調整阻抗RP ^之阻抗値rP >變小時，即使直接 連接在阻抗板8，9的電路，對座標檢出之分解度影響少 0 亦即，在圇3所示的檢出X座標之座標檢出模式，假 設從PC HK輸出入端子經由調整阻抗Rp在X輸入電極 8 a施加基準檢出電壓V cc時，X輸入電極8 a的電位， 將比基準檢出電壓V cc只降低根據調整阻抗R P之電壓降 低 V R P。 調整阻抗Rp的阻抗値rP ，在上述第1實施例，係 和接觸阻抗臨限値rc相等，在和X座標阻抗板8之阻抗 層串聯連接的座檩檢出模式，V RP比V cc將成爲不能忽視 之大小。 因此，X座標阻抗板8的兩極8 a，8 b間之電位差 *將成爲Vcc — Vrp*因Vrp爲不能忽視的大小*故將損 害根據Vx / (VCC-VRP)求得的X座檩之座檫檢出精 確度。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -----r--：---裝-- (請先閲讀背面之注意事項再填寫本頁) 訂 B7 經濟部中央標準局貝工消費合作社印製 五 >發明説明 ( 23 ) 1 但 是 在 圖 5 所 示 的 阻 抗 感 壓 型 偶 極 子 ， 以 X 座 棋 檢 1 出 模 式 > 從 I X + 輸 出 端 子 經 由 調 整 阻 抗 R P 一 在 X 輸 入 .I 電 極 8 a 施 加 基 準 檢 出 電 壓 V C C 也 因 調 整 阻 抗 R P 〆 之 ^—> 1 1 阻 抗 値 r P - 9 係 將 接 觸 阻 抗 臨 限 値 r C 以 校 正 常 數 Ν 除 請 Μ 1 1 | 的 値 5 故 V R P 小 9 而 不 會 損 害 X 座 標 之 座 標 檢 出 精 確 度 〇 讀 背 1 同 時 9 雖 然 在 上 述 本 發 明 的 第 1 第 2 實 施 例 9 係 在 之 注 1 I 意 1 I 待 命 模 式 J 經 由 調 整 阻 抗 R Ρ 在 基 準 電 壓 施 加 側 阻 抗 板 施 事 項 1 I 再 1 1 加 基 準 檢 出 電 壓 V C C 檢 出 下 筆 ， 但 是 也 可 以 在 未 施 加 寫 本 1 裝 基 準 檢 出 電 壓 V C C 的 接 地 側 阻 抗 板 連 接 調 整 阻 抗 R P 9 把 1 1 接 地 側 阻 抗 板 經 由 調 整 阻 抗 R Ρ 與 接 地 端 子 連 接 9 而 檢 出 1 I 下 筆 0 1 1 | 以 下 > 參 照 圇 6 及 圖 7 說 明 有 關 第 3 實 施 例 的 阻 抗 感 1 訂 1 壓 型 偶 極 子 3 0 0 1 1 ΓΒΓί 圖 6 係 顯 示 在 接 地 側 阻 抗 板 的 Y 座 標 阻 抗 板 9 之 Υ 1 1 输·出 電 極 9 b 連 接 調 整 阻 抗 之 可 變 阻 抗 R P 9 將 可 變 阻 抗 1 1 R P 的 他 端 接 地 之 狀 態 的 阻 抗 感 壓 型 偶 極 子 在 圖 示 之 狀 線 態 9 把 調 整 阻 抗 R Ρ 的 阻 抗 値 初 始 設 定 9 做 爲 檢 出 下 筆 之 1 I 待 命 模 式 者 0 1 1 1 該 阻 抗 感 壓 型 偶 極 子 3 0 ， 係 除 了 以 各 電 子 開 關 3 1 1 I 7 切 換 的 C P U 1 之 內 部 電 路 不 同 ， 和 連 接 在 P C Η Κ 端 1 1 子 的 調 整 阻 抗 R Ρ 之 他 端 連 接 在 Υ 座 標 阻 抗 板 9 的 Υ 輸 出 1 1 電 極 9 b 外 ί 大 致 和 第 1 實 施 例 ( 參 照 圖 1 ) 爲 相 同 構 成 1 1 1 以 和 第 1 資 施 例 相 同 的 方 法 9 在 本 阻 抗 感 壓 型 偶 極 子 1 1 1 本紙張尺度適用中國國家標準（CNS)A4規格（210X297公釐）_ % 經濟部中央標隼局員工消費合作社印製 A7 B7 五、發明説明（24) ，也在使用前試驗性地重複下筆，一面確認動作而調整調 整阻抗RP之阻抗値rP ，將下筆檢出臨限値V TR初始設 定0 以下，參照圖7說明該下筆檢出臨限値V ^的設定。 圇7 ，係圖6的阻抗感壓型偶極子之等效電路圖。圇 6的阻抗感壓型偶極子，係未按壓偶極子時，X座標阻抗 板8爲基準檢出電壓V cc電平，而Y座標阻抗板9係成爲 G N D電平。 如圖7所示，從此狀態按壓X座標阻抗板8時，在按 壓位置P-，將從X座標阻抗板8有電流it向Y座標阻 抗板9通電。此時的可變阻抗Rp和接觸阻抗r之關係， 和前述一樣能從各別的阻抗之兩端的電位差比較，能夠根 據比較A/D變換器2之输入端子AD 1的電位Vi與已 知之接地電位GND的第1電位差VA，和A/D變換器 2之輸入端子D 2與AD 3的第2電位差VB而求得。 因此，和第1實施例一樣，一面確認動作而調整可變 阻抗RP的阻抗値rP ，或如果已知接觸阻抗臨限値rc 時，把相當之阻抗値的調整阻抗Rp連接，使調整阻抗 RP之阻抗値rP和接觸阻抗臨限値rc相等。 再者，下筆檢出臨限値V TR，係判別爲下筆時的，調 整爲該接觸阻抗臨限値rc之調整阻抗Rp兩端的第1電 位差V A。 如此地，根據設定的下筆檢出臨限値VTR之偶極子， 判別下筆。在監視下筆的待命模式，CPU1之各篦子開 本紙張尺度適用中國國家標準（CNS > Α4规格（210 X 297公釐）_ 27 - -----Γ-----裝-- (請先聞讀背面之注意事項再填寫本頁) 訂 線 A7 B7 經济部中央揉準局貝工消費合作社印製 五 發明説明 ( 25 ) 1 | 關 3 7 9 也 以 和 下 筆 檢 出 臨 限 値 V T R的 初 始 設 定 時 -樣 1 之 圖 6 的 位 置 9 和 C P U 1 之 內 部 電路連 接 0 在 待 命模式 9 當 按 壓 俱 極 子 時 ，圖7 所 示 的 兩 阻 抗板 ys 1 I 8 9 9 間 之 接 觸 位 置 P 的 接 觸 阻 抗 r，將 隨 著 接 觸 壓 逐漸 請 先 閲 1 1 | 變 大 9 而 從 無 限 大 急 速 地 減 少 0 ik 背 1 1 I 把 在該接觸 阻 抗 Γ 變 化 的 狀態 ，所通 之 電 流做 爲 it 之 注 1 | 意 時 和 第 1 電 位 差 V A相等的下筆檢出臨限値V T R *爲Γ C 事 項 1 I 再 1 1 X 1 t 9 而 第 2 電 位 差 V B 9 爲 接 觸阻抗 r X 1 t 〇 填 奄 I 裝 1 因 此 將 0 Y 輸 出 入 端 子 和 οχ- 9 I Y 輸 出入 頁 ·««*✓ 1 I 端 子 的 各 電 位 V 1 V 2 9 V 3 以 A / D變 換 器 2 檢 出 ，把 1 I 以 電 位 V α與接地電位G N D之差所得的下筆檢出臨限値 1 1 I V T R 9 和 以 V 2與V 3 之電位差所得的第2電位差Vb 以 訂 1 C P U 1 比 較 時 9 將 成 爲 把 接 觸 阻 抗臨限 値 r C 和 接 觸阻 1 1 抗 r 直 接 比 較 0 1 1 亦 即 因 在 下 筆 檢 出 臨 限 値 V Τ Η和第 2 電 位 差 V B 9 1 1 皆 不 包 括 會 阻 抗 板 8 9 9 的 阻 抗 値 ，故按 壓 阻 抗 板 之 任何 線 位 置 > 皆 能 夠 以 同 條 件 比 較 0 1 I 當 接 觸 阻 抗 r 成 爲 接 觸 阻 抗 臨 限値r C 以 下 時 ί 第2 Γ | 電 位 差 V B 會 變 成 下 筆 檢 出 臨 限 値 V T R以 下 將 此 時 以 1 1 C P U 1 判 別 爲 下 筆 〇 1 1 因 此 9 在 本 第 3 實 施 例 ， 也 能 毫無遺 漏 地 檢 出 下 筆， 1 1 同 時 在 判 別 爲 下 筆 時 f 因 接 觸 阻 抗 r比A / D 變 換 器 2的 1 I 內 部 阻 抗 R A 9 成 爲 能 忽 視 程 度 地 小，故 其 變 化 將 不 會對 1 I 於 以 後 之 在 座 標 檢 出 模 式 的 座 標 檢 出有影 響 0 1 1 1 本紙張尺度適用中國國家標準（CNS)A4規格（2丨0X297公釐）_ B7 經濟部中央標李局負工消費合作社印製 五 發明説明 ( 26 ) 1 | 再 者 9 關 於 連 接 在 該 接 地 側 阻 抗 板 的 調整 阻 抗 R P 9 1 也 和 第 2 實 施 例 — 樣 > 能 夠 把 調 整 阻 抗 R P之 阻 抗 値 r P 1 9 並 換 成 做 爲 接 觸 阻 抗 臨 限 値 r C 的 1 / N ( N 爲 比 1 大 1 I 之 校 正 常 數 ) 的 阻 抗 値 r P 之 調 整 阻 抗 R p 〆 0 請 先 閱 1 I 圖 8 9 係 顯 示 更 不 同 的 有 關 第 4 實 施 例之 阻 抗 感 壓 型 背 Λ 1 | 偶 極 子 4 0 0 之 注 1 | 意 在 圖 8 的 阻 抗 感 壓 型 偶 極 子 9 下 筆 檢 出臨 限 値 V T R 9 事 項 1 I 再 1 | 爲 N X V A > 亦 即 N X r P X \ t 9 因 阻抗 値 Γ P 爲 填 % 本 1 裝 1 接 觸 阻 抗 臨 限 値 Γ C 的 1 / N 之 阻 抗 値 > 所以 下 筆 檢 出 臨 頁 1 1 限 値 V T R 爲 r C X 1 t C 1 I 因 此 9 以 A / D 變 換 器 2 檢 出 0 Y - 輸出 入 端 子 和 1 I 〇 X - 9 I Y - 输 出 入 端 子 的 各 電 位 V 1 3 V 2 > V 3 ， 以 訂 I C P U 1 比 較 將 接 地 電 位 G N D 和 電 位 V 1的差N倍而得 1 1 之 下 筆 檢 出 臨 限 値 V T R > 和 以 V 2與V 3 的電位差所得之 1 1 第 2 電 位 差 V B 時 9 將 和 上 述 第 3 實 施 例 一樣 9 直 接 比 較 1 1 接 觸 阻 抗 臨 限値 r C 和 接 媒 觸 阻 抗 Γ 〇 線 L 如 此 地 將 調 整 阻 抗 R P 的 阻 抗 値 r P變 成 阻 抗 値 1 r P 之 調 整 阻 抗 R P 時 9 能 夠 直 接 比 較接 tom 觸 阻 抗 臨 限 1 · 1 1 値 r C 和 接 觸 阻 抗 r ， 而 判 別 下 筆 9 同 時 ，和 第 2 實 施 例 1 1 — 樣 9 直 接 在 阻 抗 板 8 9 9 的 電 位 連 接 調 整阻 抗 R P 時 1 1 ， 對 座 標 檢 出 之 分 解 度 的 影 響 少 0 1 1 同 時 9 在 上 述 實 施 例 係 以 在 C P U 1內 裝 A / D 變 1 | 換 器 2 之 例 說 明 9 但 是 9 如 果 至 少 能 讀 取 3處 的 電 位 者 f 1 I A D 變 換 器 2 和 C P U 1 也 可 以 爲 獨 立 者 ，同 時 > 也 可 以 1 1 1 本紙張尺度適用中國國家標準（CNS)A4規格（210X297公釐）_ 經濟部中央梯準局員工消費合作社印製 A7 ____ B7_ 五、發明説明（27 ) 使用2以上之AD變換器2。 並且，在上述實施例，雖然根據AD變換器2求得調 整阻抗RP兩端的電位，和接觸阻抗r兩端之電位，比較 從第2電位差和第1電位差所定的下筆檢出臨限値，但是 ，也可以把調整阻抗RP兩端之電位差，和接觸阻抗r兩 端的電位差输入比較電路，比較第2電位差和下筆檢出臨 限値而判別下筆。 〔發明之效果〕 如以上所述，根據本發明時，即使阻抗感壓型偶極子 的阻抗之材質，阻抗皮膜的厚度等不同，也不需要事先將 下筆檢出臨限値VT記憶在ROM，能夠根據變更調整阻 抗之阻抗値，容易地修正下筆檢出臨限値VTR，在每偶極 子以最適條件進行下筆檢出。 同時，因將下筆檢出臨限値V TR以調整阻抗R p的阻 抗値r p設定，故將不需要如習知者，記憶下筆檢出臨限 値V T之記憶部。 並且，在判別下筆時，雖然根據偶極子的按壓位置， 在偶極子通電之電流値會不同，但是因係根據比較在接觸 阻抗r和調整阻抗R p的各別之電壓降低而判別，故能不 受按壓位置的影響地判別下筆。 同時，下筆檢出臨限値VTR，如果能事先得知偶極子 的接觸阻抗臨限値rc時，根據使用與此配合的咀抗値 r P之調整阻抗，而能簡單地設定。 本紙張尺度適用中國國家標準（〔阽）人4規格（21’0父297公釐）_3〇 _ 裝 訂 線 (請先閱讀背面之注意事項再填寫本頁) 經濟部中央樣準局員工消f合作社印製 295645 A7 B7 五、發明説明（28) 根據申請專利範圍第3，6 ，7項所述之發明時，因 爲調整阻抗Rp爲可變阻抗，故能容易地變更調整阻抗的 阻抗値rP 。因此，能夠試驗性地重複偶極子之下筆，一 面確認偶極子的動作而變更可變阻抗之阻抗値rP ，檢出 偶極子的按壓，而且能夠設定在檢出後不會顯出調整阻抗 之變化的影響之下筆檢出臨限値VTR。 因爲並非將下筆檢出臨限値VTR，只以可變阻抗調整 ，以和串聯連接的其他阻抗之分壓比而得到者，故在設定 下筆檢出臨限値V TR後，不需要爲了把前述其他阻抗從電 路切離用之開關。 根據申請專利範圍第5項所述之發明時，能夠將接觸 阻抗r變成接觸阻抗臨限値！ c以下時判別爲下筆的下筆 檢出臨限値VTR，使用接觸阻抗臨限値r=的1/N之阻 抗値rP /的調整阻抗RP ^設定，所以把調整阻抗維持 連接在阻抗板而移行至座標檢出模式，對座標檢出電路之 影響少。 四.圖面之簡單說明 〔圖1〕 係有關本發明的第1實施例之阻抗感壓型偶極子2 0 的電路圖。 〔圚2〕 爲圚1的阻抗感壓型偶極子2 0之等效電路圖。 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐）_ 3工 -----—j---裝— (請先閲讀背面之注意事項再填寫本頁) *11 線 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（29 ) 〔圇3〕 係在圖1的阻抗感壓型偶極子2 0 ，顯示X座標之座 標檢出模式的電路圖。 〔圖4〕 係在圖1的阻抗感壓型偶極子2 0 ，顯示Y座標之座 標檢出模式的電路圖。 〔圖5〕 爲顯示有關本發明的第2實施例之阻抗感壓型偶極子 的電路圖。 〔圖6〕 爲顯示有關本發明的第3實施例之阻抗感壓型偶極子 3 0的電路圖。 〔圖7〕 爲圖6的阻抗感壓型偶極子3 0之等效電路圇。 〔圖8〕 爲顯示有關本發明的第4實施例之阻抗感壓型偶極子 4 0的電路圇。 本紙張尺度適用中國國家標準（CNS)A4規格（21ΌΧ297公釐）. I---《--^---^------IT—·-----0 (請先閲讀背面之注意事項再填寫本頁) 經濟部中央樣準局員工消費合作杜印製 A 7 _B7_ 五、發明説明（3(3) 〔圖9〕 爲顯示習知的阻抗感壓型偶極子之電路圇。 C 圖 1 0〕 爲顯示根據下筆而電壓會變化的在按壓點Pi®壓 vP和下筆檢出臨限値ντ的關係之波形圖。 (a )爲接觸阻抗安定時的電壓V pi«比較低之偶極子 的波形圖， (b )爲接觸阻抗安定時的電壓V PL比較高之偶極子 的波形圖。 〔圇 1 1〕 爲顯示設定下筆檢出臨限値VT的狀態之阻抗感壓型 偶極子的電路圖。 〔圖 1 2〕 爲顯示檢出下筆的狀態之阻抗感壓型偶極子的電路圖 〔記號之說明〕At this time, when pressing the P point (X, y) of the X coordinate impedance plate 101 with a stylus pen, etc., the potential VP at the P point • Set the impedance at a distance from the X input electrode 1 11 as shown in the figure Is x2, when the impedance from the X output electrode 1 1 0 is xl, it will become Vccxxl + (xl + x2). According to the A / D converter 106, the potential is used to detect X. This paper size is suitable for China. Standard (CNS) A4 specification (210X297 mm) _ 4 _ ----- ►--1 --- installed ------. Order-: ----- line_one (please read the back first (Notes to fill out this cornel) 295645 B7 Central Ministry of Economic Affairs, Bureau of Standards, Beigong Consumer Cooperation Du Printing 5. Description of invention 2) 1 1 Coordinate (X) 〇1 Next> switch on the X side of the rice 1 0 3 1 0 4 Open * Simultaneously connect the switch 1 0 8> 1 0 9 on the Y 1 side to the A / D converter 1 0 6 1 I. Please connect the switch 1 0 7 of the input terminal of the J to the X coordinate impedance board. 1 I 1 0 1 X output electrode 1 1 0 〇Read back 1 1 When the potential VP at point P is the same as the impedance from the Y input electrode at the distance of 1 1 1 2 as y 2 the impedance from the Y output electrode 1 1 3% and the impedance of the 1 I distance as y 1 It will be VCCX y 1 (y 1 + writing book 1 installed y 2) According to reading the potential VP with A / D converter 1 0 6 and page 1 1 y coordinate is detected (y) 0 1 1 so detected at the coordinate The mode will consume a large amount of power because I will alternately apply a potential gradient to one of the X-coordinate impedance plate 1 | 1 0 1 and the Y-coordinate impedance plate 1 0 2. Therefore, the conventional impedance sensing pressure For example, the type of dipole, such as rat, shown in Figure 9 is 1 1 I. Japanese Patent Application No. 6 — 3 0 9 0 8 No. 6 In standby mode, the potential gradient is not applied to the impedance 1 1 line board, and it is moved to the coordinate test after being judged to be a pen. Out mode 0 1 1 is in standby mode The X-coordinate impedance plate 1 0 1-Square 1 | Switch 1 0 3 Close and open the other switch 1 0 4 Keep the X-coordinate impedance plate 1 I 1 0 1 to maintain the potential of VCC on the other hand> Y-coordinate impedance plate 1 0 2 1 1 1 opens the switch 1 0 8 and closes the switch 1 0 9 to ground it. 0 1 1 At this time, if the in-line terminal of the A / D converter 1 0 6 is connected to the 1 1 switch 1 0 7 When connected to the electrode side of the X-coordinate impedance plate 1 0 1 t 1 1 The potential of the input terminal is VCC 〇1 1 as described in this paper. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 mm) A7 B7, printed by Beigong Consumer Cooperation, Central Bureau of Standards, Ministry of Economic Affairs V. Description of the invention (3) Here, if the position P of the X-coordinate impedance plate 101 is pressed with a paintbrush, etc., it will pass Y from its pressing point. Coordinate impedance plate 102, switch 109 is energized to the ground side, the potential of the electrode 1 110 of the X coordinate impedance plate 101, that is, the potential of the input terminal of the A / D converter 1.06, Is reduced to the predetermined potential. In the CPU 105, the potential is compared with the preset lower pen detection threshold VT, and when it becomes the lower pen detection threshold VT or less, it is determined that the impedance plate is pressed, and the coordinate detection mode is shifted to the aforementioned. [Problem to be solved by the invention] The potential VP lowered according to the following pen is set to VccX (yl + r) + (x2 + yl + r) when the contact resistance is set to r, as shown in Figure 10 (a) The potential V cc before pressing changes as the contact resistance r decreases, and is stabilized by the potential V & when the contact resistance r becomes minimum. Therefore, the detection threshold VT of the next pen is set to a slightly higher potential as shown in FIG. 10 (a), and the value is stored in a ROM (not shown) in advance, and compared with the potential VP lowered by the pen. To determine the pressing of the impedance plate. However, since the potential VPlj when the contact impedance r becomes the minimum, it will vary according to the impedance value X 2 ′ y 1 of the X-coordinate impedance plate 1 〇1 and the Y-coordinate impedance plate 1 〇2, so it will be affected by the impedance plate. The effect of the material of the anti-layer, the thickness of the impedance film, etc. becomes different for each dipole. Therefore, when using the pen detection threshold VT set in Figure 10 (a) and the pen detection threshold VT 1 under other dipoles, the Chinese National Standard (CNS) A4 specification will be applied as shown in the paper scale (210X297mm) -----.--: --- installed ------. Ordered ------- line (please read the precautions on the back before filling in this page) Central Ministry of Economic Affairs A7 _ B7 made by the Consumer Council of the Standards Bureau for consumer cooperation. V. Description of the invention (4) 10 (b) As below V &, the pressing of the impedance plate cannot be determined. For example, when using a dipole made of carbon and a dipole made of I TO (indium tin oxide), it is necessary to use a different memory to detect the ROM of the threshold VT, and there is a problem that the ROM cannot be shared. . In order to solve this problem, as shown in FIG. 10 (a), it is possible to raise the lower detection threshold VT to a potential slightly lower than the potential V cc in the standby mode as the lower detection threshold. Value V τ 2 However, when the detection threshold VT 2 is exceeded, the contact impedance r is not lower than the internal impedance of the A / D converter 106 to the extent that it can be ignored, so if it is judged in this state When the impedance plate is pressed to move to the next coordinate detection mode, the problem that the coordinate detection will be affected by the change in the contact impedance r will occur. That is, in the coordinate detection mode, for example, the X coordinate (x <), although the potential VP at the point P is detected as shown in FIG. 9 based on the reading by the A / D converter 106 as described above, it is stable at the point P The contact resistance r is less than the internal impedance R λ (1Μ to 10ΜΩ) of the A / D converter 106. If the premise is that the electrical resistance at point P & VP has just exceeded the detection threshold ^: The contact resistance r after 2, becomes a large value. At this time, the potential read at the A / D converter 106 is VP xRa + (RA + r), so when the contact impedance becomes a value that cannot be ignored, the change in the contact impedance r will show up The reading potential VP > is the cause of the coordinate detection error. "This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm): 7 _ ----- r ----- Packing --------: Order ------ line (please read the notes on the back before filling in the purchase) Printed and printed A7 _____B7 Five 'Invention Description (5) In particular, during the period when the contact resistance r is large, the noise from the outside will also be greatly affected and become a barrier to detecting the coordinates. On the other hand, although it is known that the following pen detection threshold value VT 2 determines that the impedance plate is pressed, and then sets the time τ until the contact impedance r sufficiently decreases. The timer will delay the transition to the coordinate detection mode in the future, but it will require a sufficient timer circuit and become expensive, and the circuit becomes complicated. Moreover, the time until the contact resistance is sufficiently reduced varies with each pressing condition of the pen, and it is difficult to set the time T uniformly. . As a result, in Fig. 10 (a), the threshold VT is detected in the next pen. It will need to be a potential V π or more depending on the material of the impedance, the thickness of the impedance film, etc. At the same time, it needs to be set so that the contact resistance r decreases and its change The potential at the time of coordinate detection is below V PC, but because the potential VP1_, V ^ is a potential unique to each dipole, it is necessary to set the next detection threshold VT at each dipole and store it in the ROM. Conversely, once it is memorized in the ROM, it will not be compatible with other models, and the ROM needs to be replaced every time. In order to solve this problem, the applicant of this patent has applied to set the voltage-sensing type dipole of the threshold VT with the voltage division ratio of the impedance R 1 and the variable impedance R 2 as shown in FIG. 11. Patent (No. 6 3 5 2 7 of Teyuan Ping 7). That is, the reference detection voltage Vcc is applied to one end of the series connected impedances R 1 and R2, the other end is grounded, and the intermediate terminal T is connected to the input terminal 1+ of the A / D converter 114. Put the electric I1 binding line at the middle connector T (please read the precautions on the back-S- · fill in this page) This paper wave standard is applicable to China National Standards (CNS) A4 specifications (210X297 mm) -8-Central Ministry of Economic Affairs A7 ____B7_ printed by the Consumer Labor Cooperative of the Bureau of Standards V. Description of invention (6) As the A / D converter 1 1 4 is used to detect the threshold VT, because the potential at the intermediate connector T, the reference is checked The output voltage V cc is a potential divided by the impedances R1 and R2, so that only the impedance value R 2 of the variable impedance R2 can be changed, and it can be used as an arbitrary detection threshold VT. In order to set the detection threshold of this pen, set it to the minimum potential V of the pen below, and the potential of the contact impedance between the impedance plates is reduced to a potential that is below the potential V π when it can be ignored, and the dipole will be repeated experimentally. Use the pen to confirm the movement of the dipole and set the impedance value of the variable impedance R 2. That is, the impedance value of the variable impedance R 2 is adjusted so that it can detect the pressing of the dipole, and the effect of the change in contact impedance does not appear after detection. The value of the variable impedance R 2 adjusted in this way is the contact resistance value rMIN which is lower than the contact resistance when the dipole is pressed experimentally, and the impedance values of the two impedance plates from the pressing position P / to the electrode The sum of the resistance values of ry and γχ (rMIN + ry + rx) is slightly larger. On the other hand, when the standby mode of the pen is detected, one end (PCHK-) of the variable impedance R 2 is turned OFF, and the electrode of the X-side impedance plate 115 is grounded as shown, and the middle connector T The electric potential is compared with the detection threshold VT based on the pen setting set above, and the pen is judged. Therefore, even if the material of the impedance pressure type dipole is different, as long as the position of the pressure-sensitive dipole is adjusted during the adjustment, the dipole pressure will be detected correctly, and after detection, the resistance r will not be displayed. Impact of change》 However, in order to adjust the variable impedance, the position of pressing the dipole P >, this paper scale is applicable to China National Rolling (CNS) A4 specification (210X2S »7mm) I binding line (please read beforehand) (Notes on the back and then fill out this page) -9-A7 ___B7_ printed by the Beigong Consumer Cooperative of the Central Bureau of Economic Affairs of the Ministry of Economic Affairs V. Description of the invention (7) and the pressing position P of the pen under actual detection As shown in 12, the impedance values ry /, rx > of the two impedance plates from the pressing position P to the electrode are different, and even if the stable contact impedance value ΓμΙν does not exceed the detection threshold VT of the next pen, it may not be possible The problem of writing a pen is detected. That is, when the pressing ratio adjusts the variable impedance, the position P of the pressing dipole / the pressing position P farther from the electrode will become ry > + rx / > ry + rx, the middle connector T The potential will rise and occur The problem of pen writing can be detected. Conversely, when the compression ratio adjusts the variable resistance. When the position of pressing the dipole is close to the pressing position P of the electrode, it will become ry ^ + r X / > ry + rx, the middle connector T The potential will be reduced, and when the contact resistance r is not sufficiently reduced, it will be judged as a pen, and the problem of cursor movement will occur when the coordinates are detected later. This problem is because no matter how the threshold value VT is set for the pen detection The pressing position P at the time of pen detection will be different every time, so it cannot be solved. Also, set the variable impedance R used when the pen detection threshold VT is used in the impedance pressure dipole shown in FIG. 11 2. The standby mode and coordinate detection mode of the next pen need to be detected in the future, so that it will not affect the input voltage ground of the A / D converter 114, and its one end (PCHK-) is used as FF, and the switch for this is required. The circuit becomes complicated. The present invention was developed to solve the above problems, and its purpose is to provide a simple configuration and set a lower detection threshold VTR for each impedance-sensitive M-type dipole, and And the dipole press Irrespective of the position P, it can be judged as the detection method of the resistance pressure-sensitive dipole and the resistance pressure-sensitive dipole under the state where the contact impedance is sufficiently reduced. The paper standard uses the Chinese National Standard (CNS) A4 size (210X297mm) I binding line (please read the precautions on the back before filling in this page) -10-Printed by the Ministry of Economic Affairs Central Bureau of Accreditation Consumer Cooperatives & 5 6 45 A7 ___ B7 V. Description of invention (8) [Methods for solving the problem] In order to achieve the above-mentioned object, the impedance-pressure-type dipole described in item 1 of the patent scope mainly consists of forming X inputs on two sides having both ends along the X direction The X block purlin impedance plate of the electrode and the X output electrode, and the two sides of the two ends along the Y direction orthogonal to the X direction are respectively formed with a Y output electrode and a Y output electrode, and are slightly insulated from the X coordinate impedance plate The Y-coordinate impedance plate with overlapping gaps, and in standby mode, apply a reference detection voltage Vcc to one impedance plate to ground the other impedance plate, and detect the impedance plate from the potential of the impedance plate that changes according to the pen The impedance-sensitive dipole of the CPU is characterized in that a reference detection voltage is applied to the input electrode of one impedance plate by adjusting the impedance Rp, and the output electrode of the other impedance plate is grounded according to the A / D converter. , Compare the first potential difference VA of the input electrode potential of the detection voltage applying side impedance plate with the reference detection voltage, and the first potential difference of the output electrode potential of the detection voltage applying side impedance plate and the potential of the input electrode of the grounding side impedance plate The second potential difference VB is determined to be a person pressing the impedance plate when the second potential difference VB is equal to or less than the predetermined pen detection threshold V TR from the first potential difference VA. When the dipole is pressed in the pen detection state, the input electrode of the impedance plate on the voltage application side will be detected via the adjusted impedance Rp from one end of the adjusted impedance RP to which the reference detection voltage is applied. The contact impedance of the position, the output electrode of the impedance plate on the ground side will be energized. At this time, because the output electrode of the impedance plate on the detection voltage application side and the size of the connected paper are applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) J II Gutter (Please read the precautions on the back before filling in this page) -11 Printed by the Ministry of Economic Affairs, Central Bureau of Samples and Consumers Cooperative A7 __B7 V. Description of the invention (9) The input electrode of the ground-side impedance plate will not be powered, Therefore, the first potential difference VA represents a voltage decrease based on the adjusted impedance RP, and the second potential difference VB represents a voltage decrease based on the contact impedance r. At the same time, since the current values of the adjusted impedance and the contact impedance are the same, when the second potential difference VB and the first potential difference VA are compared, the impedance value of the changed contact impedance and the impedance value of the adjusted impedance RP can be compared. When the impedance value of the adjustment impedance RP is adjusted based on the impedance value when the impedance value of the contact impedance r drops to a negligible level (hereinafter, referred to as the contact impedance threshold rc), the comparison is determined from the first potential difference VA Detection threshold V TR and the second potential difference VB of the next pen, when the second potential difference VB can be lower than the detection threshold V TR of the next pen, the contact resistance r is reduced to the contact impedance threshold rc, and it is judged Press the impedance plate. That is, although the current value at which the dipole is energized differs according to the pressing position of the dipole, the resistance, impedance value, and contact resistance voltage are adjusted according to the comparison, and the pressing of the impedance plate can be determined without being affected by the pressing position. At the same time, the next detection threshold VTR can be set according to the adjustment impedance RP using the impedance value rp matched with this if the contact impedance threshold rc of the dipole can be known in advance. The impedance-sensing type dipole described in item 2 of the patent application scope mainly consists of an X-coordinate impedance plate having X input electrodes and X output electrodes formed on two sides along the Y direction, and positive along the Y direction. The two sides of the crossing X direction are formed with Y input electrodes and Y output electrodes, respectively, with the X coordinate impedance, the Y coordinate impedance plate superimposed with a small insulating gap, and in standby mode, a reference check will be applied on one impedance plate The control of the output voltage Vcc 'is to adapt the size of the other paper to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) IIIII ^ Pack I »n Order II line (please read the precautions on the back before filling this page) -12-B7 B7 Printed by the Consumer Cooperative of the Central Falcon Bureau of the Ministry of Economic Affairs V. Invention Description (10) The ground of the impedance plate is square, and the position of the impedance plate that changes according to the pen is detected, and the C PU that presses the impedance plate is detected. The impedance pressure-sensitive dipole is characterized in that a reference detection voltage is applied to the input electrode of one impedance plate, and the output electrode of the other impedance plate is grounded via the adjusted impedance Rp, and the detection is performed according to the A / D converter. Voltage application side Each potential of the output electrode of the anti-plate and the input electrode and output electrode of the ground-side impedance plate is detected, and according to the C PU, the first potential difference VA of the potential of the output electrode of the ground-side impedance plate and the ground voltage, and the detected voltage The first potential difference VA between the potential of the output electrode of the application side impedance plate and the ground voltage is compared with the second potential difference VB of the potential of the output electrode of the detection voltage application side impedance plate and the potential of the input electrode of the ground side impedance plate. 2 When the first potential difference VA is equal to or lower than the predetermined pen detection threshold VTR from the first potential difference VA, it is determined that the impedance plate has been pressed. When the dipole is pressed in the detection state of the next pen, the input electrode of the detection voltage application side impedance plate applying the reference detection voltage, the contact impedance at the pressed position via the detection voltage application side impedance plate, the ground side impedance plate, The output m pole of the impedance plate on the ground side is adjusted to the impedance rp to be energized. At this time, since the output electrode of the impedance plate on the detection voltage application side and the input electrode of the ground-side impedance plate are not energized, the first potential difference vA represents the voltage decrease according to the adjusted impedance Rp, and the second potential difference νΒ represents the basis The voltage of the contact resistance r decreases. At the same time, since the current values of the adjusted impedance value and the ground impedance are equal, when the second potential difference VB and the first potential difference VA are compared, the impedance value of the changed contact impedance and the impedance value of the adjusted impedance R P can be compared. This paper scale is applicable to the Chinese national standard (CNS M4 specification (210X297mm) ----- " ----- ^-(please read the precautions on the back before filling out this page) Central Standard of the Ministry of Economics A7 B7 printed by the Bureau Cooperative Consumer Co., Ltd. V. Description of the invention (11) Compare the first detection threshold V 1 ^ and the second potential difference VB determined from the first potential difference νΑ, when the second potential difference νΒ becomes the next detection limit When the value is below tr, as the impedance plate is pressed, it can be directly compared with the contact impedance threshold value r. Compare and judge the pressing of the impedance plate. That is, although the current value of the dipole will be determined according to the pressing position of the dipole Different, but the impedance value and the contact resistance voltage drop can be adjusted according to the comparison, and the pressing of the impedance plate can be judged without being affected by the pressing position. Furthermore, the threshold value VTR is detected in the pen, if the dipole contact can be known in advance The impedance threshold value r. Can be set according to the adjusted impedance RP using the impedance value matched with this. The impedance-sensing type dipole described in item 3 of the patent scope is characterized in that the adjusted impedance RP is variable Impedance The whole impedance RP is a variable impedance, so the impedance value r P of the adjustment impedance Rp can be easily changed. Therefore, the dipole dipole can be experimentally repeated, and the impedance value rp of the variable impedance can be changed while confirming the operation of the dipole. The detection of the dipole pressure, and it can be set so that it does not show the influence of the change in contact impedance after the detection, the pen detection threshold value VTR. Because the pen detection threshold value V TR is not the only The variable impedance adjustment is obtained by the voltage division ratio with other impedances connected in series, so there is no need to switch the other impedances away from the circuit after detecting the threshold value ¥ ^ under the setting. The impedance-sensitive dipole described in item 4 of the patent scope is characterized in that the detection threshold value of the first pen is equal to the first potential difference VA. Because the detection threshold value V TR of the next pen is equal to the first potential difference, it is like this paper Le standard applies to China National Standard (CNS) A4 specification (210X297mm) ~ '-14-binding line (please read the precautions on the back before filling in this page) Employee consumption cooperation of the Central Standard Falcon Bureau of the Ministry of Economic Affairs Du Printed A7 _B7 Five, issued Explanation (12) If the adjusted impedance RP with the same impedance value as the contact impedance threshold value rc is used, when the second potential difference VB becomes the next detection threshold value V TRW, the contact impedance will become below the contact impedance threshold value rc It can be directly compared with the contact impedance threshold r. Compare and judge the pressing of the impedance plate. The impedance pressure-sensitive dipole described in item 5 of the patent scope is characterized in that the threshold value is detected in the following pen. 1 is the value of the potential difference VA multiplied by the correction constant N greater than 1. It can be judged as the next pen detection threshold value V TR when the contact impedance r becomes lower than the contact impedance threshold value rc, using 1 / N impedance The adjusted impedance RP setting of the value r P has little effect on the coordinate detection circuit. After moving to the frame purse detection mode, it is also possible to connect the adjusted impedance RP to form a potential gradient on the impedance plate. The method for detecting the pen under the pressure-sensitive dipole described in item 6 of the scope of patent application mainly consists of weighing the X-coordinate impedance plate and the Y-coordinate impedance plate with a small insulating gap S, in standby mode, controlled to be one side The reference detection voltage Vcc is applied to the impedance plate, and the other impedance plate is grounded. The potential detection method of the impedance-sensitive dipole that has pressed the impedance plate is detected from the potential of the impedance plate that changes according to the pen. , On one impedance plate, apply the reference detection voltage through the adjustment impedance Rp, and ground the other impedance plate at the same time, compare the first potential difference VA of the potential difference between the two ends of the adjustment impedance Rp, and the second potential of the potential difference between the impedance plates VB, when the second potential difference Vb becomes equal to or less than the threshold value V TR detected by the pen from the first potential difference Va, it is determined that the impedance plate has been pressed. The paper size of the pen under the pressure-sensitive dipole described in item 7 of the patent scope is applicable to the Chinese National Standard (CNS) Α4 specification (21.0X297mm) -----.--: --- ^- ---- ， 玎 ------ ά. (Please read the precautions on the back before filling out this page) Du Printed by the Consumer Standardization Bureau of the Ministry of Economic Affairs, Central China A 7 B7 V. Description of the invention (13) Checked out The method is mainly to overlap the X-frame sassafras impedance plate and the Y-coordinate impedance plate with a small insulating gap. In the standby mode, the reference detection voltage Vcc is applied to one impedance plate, and the other impedance plate is grounded The method of detecting a pen under an impedance pressure type dipole that has pressed the impedance plate from the potential of the impedance plate that changes according to the pen is characterized by applying a reference detection voltage to one impedance plate and simultaneously applying the other impedance plate By adjusting the impedance Rp to ground, the first potential difference vA of the potential difference between the two ends of the adjustment impedance RP is compared with the second potential difference Vb of the m-potential difference between the impedance plates. When the second potential difference VB becomes the first test determined from the first potential difference νΑ When the threshold is below V TR, it is judged as pressing the impedance plate . In the pen detection method of the impedance-sensitive dipole described in items 6 and 7 of the patent scope, the ratio of the second potential difference VB and the first potential difference VA will indicate the change in the impedance value and adjustment of the contact impedance r The ratio of the impedance value of the impedance RP. Comparing the detection threshold value V ^ determined from the first potential difference VA and the second potential difference VB, when the second potential difference VB becomes lower than the detection threshold value VTR, it can directly contact with the impedance plate when pressed The impedance threshold value rc is compared, and the pressing of the impedance plate is discriminated. Since the adjustment impedance RP is a variable impedance, the impedance value rP of the adjustment impedance RP can be changed, and the detection threshold value VTR can be easily set. Because the threshold value VTR is detected by the pen, it is only adjusted by variable impedance, not by the voltage division ratio with other impedances connected in series. Therefore, after setting the pen threshold VTR under the pen setting, it is not necessary to A switch for disconnecting the aforementioned other impedances from the circuit. The size of this paper is applicable to the Chinese National Standard (CNS) A4 specification (2 Η) X 297 mm), c -10 ----- r-^ --- installed-- (please read the precautions on the back first (Fill in this page) Line A7 B7 Printed by the Employee Consumer Cooperative of the Central Standard Falcon Bureau of the Ministry of Economy V. Description of the invention (14) 1 1 [Embodiment 1 The following describes the embodiment of the invention according to the drawings. 〇 I I Figure 1 to Figure 4 > It shows the impedance of the first embodiment of the present invention. Please read first 1 1 I Pressure-sensitive dipole 2 0 9 9 In FIG. 1 9 CPU 1 is equipped with A / D read back I 1 Inverter 2 9 The A / D converter 9 has three input terminals AD 1 9 Note 1 IAD 2 AD 3 y becomes a potential that can detect each input terminal at the same time. Item 1 I 1 | 1 in CPU 1 9 has 5 input terminals PC Η Κ 9 IX 9% This 1 is installed I 0 X y IY 9 0 Y 9 There is a page connected to the rear of each input / output terminal '— | The electronic switch 3 7 that switches the connection between these terminals and the internal circuit. Each 1 I electronic switch 3 7 > becomes an individual operation according to the control of the CPU 1 1 1 | 9 and the internal circuit in the CPU 1 The connection can be switched between 8 and 9 for the X-coordinate impedance plate and the Y-coordinate impedance plate according to the printed spacers printed on the impedance 1 plates 8 and 9 in dots (not shown in ΓΒΓΙ). Form a mutually uniform impedance layer to oppose the ground. 0 1 | As shown in the figure, an X input electrode 8 a and an X output electrode 8 b are formed on the X coordinate impedance plate 8 along the line 2 at both ends in the X direction 1 1 | m pole 8 a 9 is connected to the IX * terminal of the CPU 1 and the impedance can be adjusted. 0 1 Variable impedance RP is connected to the PC Η Κ terminal 9 X output electrode 8 b 9 is connected 1 1 to the CPU 1 0 X -Terminal 〇1 1 at the same time 9 in the Y block Sassafras impedance 9 Two sides of both ends in the Y direction 1 1 Y input electrode 9 a and Υ output electrode 9 b are formed 9 Υ input electrode 1 | 9 a is connected to the IY-terminal of CPU 1> Y output electrode 9 b system 1 I Connected to CPU 1's 0 Y-terminal 0 1 1 1 The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm), ^ -1 / 295645 A7 B7 V. Invention description (15) Prior to use, the impedance-sensing type dipole will initially set the pen detection threshold value V TR under the detection sensitivity of the pressing of the detection impedance plate in the standby mode. (Please read the precautions on the back before filling in this page) When the initial value of the detection threshold value vTR is checked, the electronic switches 3 ~ 7 of C PU 1 are operated as shown in Fig. 1, and the CPU 1 is turned on. Each input and output terminal is connected to the internal circuit. That is, the PCHK * terminal is connected to the power supply Vcc according to the switch 3, and the X input electrode 8a of the X block called the impedance plate 8 is applied with the reference detection voltage Vcc via the variable impedance Rp. At the same time, the input and output terminals of IX * > 0 X-, ΙΥ · are connected to the input terminals ADI, AD2, AD3 of the A / D converter 2 according to the switches 4, 5, 6 respectively, so that the X coordinate is detected The electric potential of the X input electrode 8 a of the impedance plate 8, the X output electrode 8 b and the Y input electrode 9 a of the Y coordinate impedance plate 9. The remaining 0Y input and output terminals are connected to the ground terminal according to the electronic switch 7, and the output electrode 9b of the Y coordinate impedance plate 9 is used as the G N D level. Printed in this example by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs. From this state, the dipole is pressed experimentally, while confirming the operation of the impedance pressure-sensitive dipole, while adjusting the impedance value rP of the variable impedance RP, the written test is set Out of the threshold VTR. The setting of the next detection threshold value V 〃 will be described below with reference to FIG. 2. 'Figure 2 is an equivalent circuit diagram of the impedance-pressure dipole of Figure 1. Impedance-sensitive dipole 20. When the dipole is not pressed, the X-coordinate impedance plate 8 detects the voltage Vcc level as the reference, and the Y-coordinate impedance plate 9 becomes the paper standard applicable to the Chinese national standard (〇 奶) Eight 4 specifications (210 father 297 mm) _18_ ~~~~ A7 _B7______ printed by the Beigong Consumer Cooperative of the Central Bureau of Economic Affairs of the Ministry of Economic Affairs V. Invention description (16) GND level. As shown in the figure, when the X block purlin impedance plate 8 is pressed from this state, at the pressed position, the X coordinate impedance plate 8 will move from the X coordinate impedance plate 8 to the Y coordinate impedance plate 9, and a current i t that changes according to the change in contact impedance will be energized. At this time, at the IX + > Ο X-,: IY I / O terminals, because the A / D converter 2 is connected separately, when the small current flowing in these directions is ignored, the variable impedance RP and the contact impedance r, will pass the same current i. Therefore, when comparing the potential difference between the two ends as the first potential difference VA and the second potential difference Vb, the resistance value r p of the variable resistance R P and the contact resistance r can be compared. As can be seen from the same figure, the first potential difference VA can detect the voltage Vcc and the potential Vi of the input terminal AD 1 of the A / D converter 2 from a known reference, and the second potential difference VB can be detected from the A / D converter 2 The potentials V2 and V3 of the input terminals AD 2 and AD 3 are obtained. In this embodiment, the impedance value r P of the variable impedance RP is adjusted to be equal to the contact impedance threshold value rc, and the threshold is detected based on the first potential difference VA at both ends of the variable impedance RP at this time. The value VTR is compared with the threshold value VTR and the second potential difference VB detected by the pen. In essence, the contact resistance threshold value r is compared with the contact resistance r that changes according to the dipole pressing (hereinafter referred to as the pen). In order to adjust the impedance value rP of the variable impedance RP to be equal to the contact impedance threshold value rc, the impedance value of the variable impedance RP is changed every time! ·. When the dipole is pressed and the second potential difference VB becomes equal to or less than the first potential difference VA, it is judged that the pen is detected to confirm the action of the dipole. The size of this paper is applicable to the Chinese National Standard (〇 奶) 84 specifications (21_0 father 297 mm) _19_ ~ —a binding line (please read the precautions on the back and then fill out this page) Ministry of Economic Affairs Central Ministry of Industry and Fisheries Consumer Cooperative Printed A7 ----- Β2_ V. Description of the invention (17) The resistance value r ρ of the variable resistance R ρ is smaller than the minimum stability value r of the contact resistance r rMIN will not detect the pen, if it is too large, the contact resistance r Before the internal circuit RA of the A / 〇 converter becomes negligible, it will be judged as a pen, so the fan resistance of the contact impedance r will appear as an error in the coordinate detection data, and the cursor will change with the contact impedance r mobile. That is, when the pen is indeed detected, and the change of the contact resistance r after the pen is detected does not affect the coordinates of the pen detected after the pen is detected, the impedance value rP of the variable impedance RP will be adjusted to a ratio A The internal circuit Ra of the / D fan converter is sufficiently small and equal to the contact impedance threshold value rc greater than the minimum stability value r MIN1. Furthermore, in this embodiment, the first impedance difference VA is adjusted using the adjustment impedance RP as a variable impedance. However, the adjustment impedance RP having a different impedance value may be appropriately replaced to adjust the first potential difference VA. In particular, in the above embodiment, although the pen dipole test was repeated experimentally to confirm the operation of the dipole, the impedance value rP of the variable impedance Rp was obtained and adjusted according to the change in the impedance value rp, but, If the contact resistance threshold value r can be known in advance. In this case, it is possible to adjust the impedance Rp according to the impedance value rP that is slightly the same as the connection, without having to repeat the above adjustments for adjustment. In this way, the pen is judged based on the dipole of -1 which adjusts the adjustment impedance RP to be equal to the contact impedance threshold value r c. In the standby mode for monitoring the pen, as in the initial setting of the threshold value V tr detected in the pen, the mold switches 3 to 7 of the C PU 1 are operated as shown in FIG. 1, and the X block purlin impedance plate is operated. 8 as the reference voltage detection ^ paper wave scale is applicable to the Chinese national standard (〇 吣) 8 4 specifications (210 '297 mm) _2〇--(please read the precautions on the back before filling this page)-installed. The A7 _B7___ printed by the Beigong Consumer Cooperative of the Central Prototype Bureau of the Ministry of Economic Affairs V. Invention description (18) V CC level, and the Y coordinate impedance plate 9 is used as the GND level. In this standby mode, since there is no power supply between the X-frame sassafras impedance plate 8 and the Y-coordinate impedance plate 9, the potentials at both ends of the adjustment impedance Rp are equal, and the first potential VA is 0V. At the same time, the potentials of the input and output terminals of 0X —, [Υ ♦ are V cc and 0V, respectively, and the second potential difference VB is Vcc, so it is larger than the first potential difference. As shown in FIG. 2, when the dipole is pressed from this state, the contact resistance r at the contact position P between the two impedance plates 8 and 9 decreases rapidly as the contact pressure becomes larger, and it is infinitely and rapidly reduced. In the state where the contact impedance changes, when the current is set to it, the first potential difference ▽ ▲ is! ·. X i t, the impedance value rP is adjusted to the contact resistance threshold value r < = Equal value, so the next detection threshold value V TR equal to the first potential difference VA can be expressed as the product of r c and it. Therefore, the potentials Vi, v2, v3 of the IX- input terminal and οχ-, ιγ- output terminal are detected by the A / D converter 2, and the difference between the reference detection voltage V CC and the potential V i will be obtained When the threshold value VtR is detected in the next pen and compared with the second potential difference VB obtained by the potential difference between v2 and V3 with the CPU1, the contact resistance threshold value and the contact resistance r will be directly compared. That is, since the threshold value V TR and the second potential difference V b are detected in the following pen, neither of the impedance values of the impedance plates 8 and 9 is included. Therefore, any position of pressing the impedance plate can be compared under the same conditions. The contact resistance r becomes the contact resistance threshold value r <: In the following, the second potential difference VB will become the next detection threshold V TR or less. At this time, the Chinese national standard (CNS) A4 specification (210X297 mm) will be applied at this paper scale ~ ---- -Z1 -Binding line (please read the precautions on the back before filling in this page) A7 __B7 printed by the Beigong Consumer Cooperative of the Central Bureau of Economic Affairs of the Ministry of Economic Affairs 5. Invention description (w) CPU 1 is judged to be the next one. Therefore, the pen can be completely detected, and at the same time when the pen is judged to be penalized, the contact impedance r becomes negligibly smaller than the internal impedance Ra of the A / D converter 2, so its change is for the coordinate detection mode in the future The detection of the coordinates has no effect. When the pen is detected in the standby mode, the mode is shifted to the coordinate detection mode, a potential gradient is formed alternately between the X-frame sassafras impedance plate 8 and the Y-coordinate impedance plate 9, and the X, Y coordinates of the pressing position P are detected. In the chess detection mode, the PCHK + terminal is turned off according to the electronic switch 3, and the adjusted impedance Rp is cut off from the circuit of the impedance board. Fig. 3 shows an impedance pressure-sensitive dipole in which a potential gradient is formed on the X-coordinate impedance plate 8 in order to detect the X-position purlin. That is, the IX_ input terminal is connected to the power supply Vcc according to the electronic switch 4, the reference detection voltage Vcc is applied from the I X_ input terminal to the X input electrode 8 a of the X-coordinate impedance plate 8, and at the same time the OX — output terminal is input The electronic switch 5 is grounded, and the other X output electrode 8 b of the X coordinate impedance plate 8 is grounded to form a uniformly inclined potential gradient on the X coordinate impedance plate 8. At the same time, the Y-coordinate impedance plate 9 connects the Υ-output terminal connected to the Y output electrode 9 b, and is disconnected according to the electronic switch 7 so that the contact position from the X-coordinate impedance plate 8 does not go to the Y-coordinate impedance plate 9 While energized, the I + input and output terminals were connected to the input terminal AD 3 of the A / D converter 2 according to the mold switch 6, and the electric potential at the pressing position P was detected from the YO input electrode 9a of the y coordinate impedance plate 9. (CNS) (21 {) X297 / > *) _ cyy — (please read the precautions on the back and then fill out this page). Pack. Order A7 __ B7 printed by the Staff Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (20) Then, from the potential Vx detected by the input terminal AD3, the X coordinate (Vx / Vcc) of the pressed position P is calculated by the CPU 1 and detected 0. After the X coordinate purse is detected, it is detected in the same way Out of Y purlin. Fig. 4 shows an impedance-sensitive dipole in which a potential gradient state is formed on the Y-coordinate impedance plate 9. As shown in the figure, according to the operation of the electronic switches 6, 7, a reference detection voltage Vcc is applied to the Y input electrode 9a of the Y coordinate impedance plate 9, and the other Y output electrode 9b is grounded at the Y coordinate impedance plate 9. Form a uniform gradient of potential. At the same time, according to the actions of the electronic switches 4 and 5, the X output electrode 8 b terminal of the X coordinate impedance plate 8 is turned off, so that it will not be energized to the X coordinate impedance plate 8 from the contact position with the Y coordinate impedance plate 9, At the same time, the IX + I / O terminal connected to the X input electrode 8 a is connected to the input terminal AD 1 of the A / D converter 2, and the potential at the pressing position P is detected from the X input electrode 8 a. In this way, similar to the X coordinate, the Y coordinate (VY / VCC) of the pressing position P is calculated by the CPU 1 from the potential VY detected at the input terminal AD 1. After the X and Y coordinates are detected, the CPU 1 will control the electronic switches 3 to 7 to return to the state shown in Figure 1 and repeat the pen detection. When the second pen is detected, if the second potential difference VB is below the detection threshold V TR of the next pen, it will be determined that the pen will continue to be pressed after the purlin is detected, and this paper standard is applicable to the Chinese National Standard (CNS > A4 Specifications (2Γ0Χ297mm) _ 23 Binding line (please read the note Ϋ on the back before filling in this page) A7 _B7__ printed by the employee consumer cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (21) Take the X that was just detected before Coordinates and γ coordinates are used as valid position information and output to a PC or other host processing device β (not shown). In addition, if the pen cannot be determined at this time, it is determined that the pen is separated during the coordinate detection, and the The position information of the X coordinate and Υ coordinate detected just before is invalid. In any case, once the pen is detected and the coordinate detection is carried out, it will become the standby mode again after the specified time (such as 5ms ec). In the first embodiment above, although the first potential difference V a is directly compared as the next detection threshold value VTR and the second potential difference VB, the impedance-sensing type shown in FIG. 5 may also be used Dipole, Adjusting the impedance of an impedance value RP rP /, Shu adjusted threshold Zhi the contact resistance rc / N (N is a calibration constant greater than 1) of the impedance Zhi r./N, adjusting resistance Rp < The potential difference N times the first potential difference VA at both ends is used as the next pen detection threshold value VTR, and compared with the second pen detection threshold value V TR and the second potential difference V B. As in the previous embodiment, if the current in the state where the contact impedance changes is it, the threshold value Vtr is detected in the next pen, which is NXVA, that is, NX rp ^ X it, because the impedance value rP / has been adjusted to the contact impedance threshold The impedance value of 1 / Ν of rc, as a result, the detection threshold value Vtr can be expressed as 0 by the product of l * c and ί. Therefore, the IX-output terminal and OX ·, IY-output terminal The potentials Vi, v2, V3 are detected by the A / D converter 2, and the next test, which is obtained by N times the difference between the reference detection voltage Vcc and the potential V i, is in accordance with the Chinese National Standard (CNS) A4 specification. 210X 297 mm) _%-" I binding line (please read the precautions on the back before filling in this page) Printed 295645 A7 B7 by the Beigong Consumer Cooperative of the Central Standards Bureau of the Ministry of Economy V. Description of invention (22) Restricted value vTR When comparing the second potential difference vB obtained by the m-bit difference between ▽ 2 and Q3 with the CPU1, the contact impedance threshold value rc and the contact impedance r can be directly compared as in the first embodiment described above. In this way, the impedance value of the impedance RP will be adjusted! ·. Change to impedance value r p / small adjustment impedance R p ^, you can also compare the contact impedance threshold value r c and the contact impedance r to judge the writing. Furthermore, although in the present invention, it is not necessary to separate the adjustment impedance RP from the circuits of the impedance plates 8 and 9 in the coordinate detection mode, but as in the second embodiment, the impedance value rP of the adjustment impedance RP ^ is changed Even if the circuit directly connected to the impedance plates 8 and 9 has less influence on the resolution of the coordinate detection, that is, the coordinate detection mode of X coordinate detection shown in Figure 3, assuming that the input and output terminals are from PC HK When the reference detection voltage V cc is applied to the X input electrode 8 a via the adjustment impedance Rp, the potential of the X input electrode 8 a will be lower than the reference detection voltage V cc by the voltage VRP according to the voltage of the adjustment impedance RP. The impedance value rP of the adjusted impedance Rp is equal to the contact impedance threshold value rc in the first embodiment described above. In the case of the purlin detection mode connected in series with the impedance layer of the X-coordinate impedance plate 8, V RP is greater than V cc Become a size that cannot be ignored. Therefore, the potential difference between the two poles 8 a, 8 b of the X-coordinate impedance plate 8 will become Vcc — Vrp * Since Vrp is a size that cannot be ignored *, it will damage the X-position purlin obtained from Vx / (VCC-VRP) The detection accuracy of the sassafras. This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297mm) ----- r-: --- installed-- (please read the precautions on the back and then fill out this page) Order B7 Central Ministry of Economic Affairs Printed by the Standard Bureau Beigong Consumer Cooperative Society > Description of the invention (23) 1 However, the impedance-sensing type dipole shown in FIG. 5 is detected in the X block chess 1 mode > From the IX + output terminal, the impedance RP is adjusted 1. At the X input. I electrode 8 a is applied with the reference detection voltage VCC also due to the adjustment of the impedance RP 〆 之 ^ — > 1 1 Impedance value r P-9 sets the contact impedance threshold value r C by the correction constant N divided by Μ 1 1 | The value 5 so the VRP is 9 without compromising the coordinate detection accuracy of the X coordinate. Read back 1 and 9 at the same time. In the above-mentioned first embodiment of the present invention, the second embodiment 9 is Note 1 I meaning 1 I Standby mode J Impedance plate application item on the reference voltage application side by adjusting the impedance R Ρ 1 I Then add 1 1 to the reference detection voltage VCC to detect the pen, but you can also connect to the ground-side impedance plate without the reference book 1 installed the reference detection voltage VCC to adjust the impedance RP 9 1 1 ground-side impedance plate through the adjustment impedance R Ρ and The grounding terminal is connected to 9 and detected 1 I. Pen 1 0 1 1 | The following > The impedance sense related to the third embodiment will be explained with reference to Fig. 6 and Fig. 7 1 Set 1 Pressure dipole 3 0 0 1 1 ΓΒΓί Fig. 6 is shown in The Y-coordinate impedance plate 9 of the ground-side impedance plate is connected to the 1 1 output / output electrode 9 b. The variable impedance RP 9 for adjusting the impedance is connected. The impedance-sensitive dipole with the other end of the variable impedance 1 1 RP grounded The state of the line 9 shown in the figure is the initial setting of the impedance value 9 of the adjusted impedance R Ρ as the 1 of the pen detected. I Standby mode 0 1 1 1 The impedance pressure-sensitive dipole 3 0, It is different from the internal circuit of the CPU 1 switched by each electronic switch 3 1 1 I 7, and the other end of the adjusted impedance R P connected to the PC Η Κ terminal 1 1 is connected to the Υ output 1 1 of the coordinate impedance plate 9 The electrode 9 b is basically the same as the first embodiment (refer to FIG. 1) 1 1 1 In the same way as the first embodiment 9 In this impedance-sensitive dipole 1 1 1 The paper size is applicable to the country of China Standard (CNS) A4 specification (210X297 mm) _% A7 B7 printed by the Employee Consumer Cooperative of the Central Standard Falcon Bureau of the Ministry of Economic Affairs V. Description of invention (24), and also repeated the pen experimentally before use, while confirming the action and adjusting The impedance value rP of the impedance RP will initially set the next detection threshold VTR below 0, and the setting of the next detection threshold V ^ will be described with reference to FIG. Fig. 7 is an equivalent circuit diagram of the impedance pressure-sensitive dipole of Fig. 6. When the dipole 6 is an impedance pressure-sensitive dipole, when the dipole is not pressed, the X-coordinate impedance plate 8 detects the voltage V cc level as a reference, and the Y-coordinate impedance plate 9 becomes the G N D level. As shown in FIG. 7, when the X-coordinate impedance plate 8 is pressed from this state, at the pressing position P-, a current it from the X-coordinate impedance plate 8 is energized to the Y-coordinate impedance plate 9. At this time, the relationship between the variable impedance Rp and the contact impedance r can be compared with the potential difference between the two ends of the respective impedances as before, and the potential Vi of the input terminal AD 1 of the A / D converter 2 can be compared with the known ground according to the comparison. The first potential difference VA of the potential GND and the second potential difference VB between the input terminal D 2 of the A / D converter 2 and the AD 3 are obtained. Therefore, as in the first embodiment, the impedance value rP of the variable impedance RP is adjusted while confirming the operation, or if the contact impedance threshold value rc is known, the adjustment impedance Rp of a corresponding impedance value is connected to adjust the impedance RP The impedance value rP and the contact impedance threshold value rc are equal. In addition, when the next pen detects the threshold value V TR, it is determined as the first pen, and it is adjusted to the first potential difference V A across the adjusted impedance Rp of the contact impedance threshold value rc. In this way, the dipole of the threshold value VTR is detected according to the set pen, and the pen is judged. In the standby mode under monitoring, the paper format of each grate of CPU1 is applicable to the Chinese national standard (CNS> Α4 specification (210 X 297 mm) _ 27------ Γ ----- installed-( Please read the precautions on the back first and then fill out this page) Line A7 B7 The Ministry of Economic Affairs, Central Bureau of Economic Development, Beigong Consumer Cooperative Printed the description of the five inventions (25) 1 | Close 3 7 9 The initial setting of the VTR-position 1 in Figure 6 of sample 1 and the internal circuit connection of CPU 1 0 in standby mode 9 When pressing the pole, the contact position between the two impedance plates ys 1 I 8 9 9 shown in Figure 7 The contact resistance r of P will gradually read with the contact pressure 1 1 | becomes 9 and decreases rapidly from infinity to 0 ik back 1 1 I Let the current passed in the state where the contact resistance Γ changes, as it Note 1 | The next detection threshold VTR with the intention that the first potential difference VA is equal to VTR * is Γ C Item 1 I then 1 1 X 1 t 9 and the second potential difference VB 9 is the contact resistance r X 1 t 〇 Fill in I installed 1 so that 0 Y is output to the terminal and οx- 9 IY output to the page · «« * ✓ 1 I terminal each potential V 1 V 2 9 V 3 is detected by the A / D converter 2. 1 I detects the threshold value 1 1 obtained by the difference between the potential V α and the ground potential GND. 1 1 IVTR 9 and the first obtained by the potential difference between V 2 and V 3 2 Potential difference Vb can be set as 1 CPU 1 when comparing 9 will be to directly compare the contact resistance threshold value r C and the contact resistance 1 1 resistance r 0 1 1 that is because the threshold value V Τ Η and the second potential difference are detected in the next pen VB 9 1 1 does not include the impedance value of the impedance plate 8 9 9, so pressing any line position of the impedance plate can be compared with the same conditions 0 1 I When the contact impedance r becomes the contact impedance threshold value r C or less ί The 2nd Γ | The potential difference VB will become the next detection threshold value VTR or less. At this time, 1 1 CPU 1 will be judged as the next pen. 1 1 Therefore 9 In this third embodiment, the pen can also be detected without omission, 1 1 At the same time when the pen is judged to be pen, at the same time, the internal impedance RA 9 of the A / D converter 2 becomes capable of 1 due to the contact impedance r than the A / D converter 2 The degree of neglect is small, so its change will not affect the coordinate detection of 1 I in the coordinate detection mode in the future. 0 1 1 1 This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (2 丨 0X297mm ) _ B7 The Fifth Invention Note printed by the Consumer Labor Cooperative of the Central Standardization Bureau of the Ministry of Economic Affairs (26) 1 | In addition, the adjustment impedance RP 9 1 connected to the ground-side impedance plate is also the same as that in the second embodiment-> The resistance value r P 1 9 of the adjustment resistance RP can be replaced by the resistance value r p of the contact resistance threshold value r C 1 / N (N is a correction constant greater than 1 by 1 I). 〆0 Please read first 1 I Figure 8 9 shows the resistance of the fourth embodiment that is more different Anti-pressure-sensitive back Λ 1 | Note 1 of dipole 4 0 0 | Intentional pressure-sensitive dipole 9 of FIG. 8 Pen detection threshold VTR 9 Item 1 I 1 again | is NXVA > NX r PX \ t 9 Because the impedance value Γ P is the% fill, this 1 device 1 is the 1 / N impedance value of the contact impedance threshold value Γ C > so the next page is detected 1 1 The limit value VTR is r CX 1 t C 1 I therefore 9 A / D converter 2 detects 0 Y-I / O terminal and 1 I 〇X-9 IY-I / O terminal potentials V 1 3 V 2 > V 3 to compare with ICPU 1 The difference between the ground potential GND and the potential V 1 is N times to get 1 1 under the pen detection threshold value VTR > and the one obtained by the potential difference between V 2 and V 3 1 2 When the potential difference VB 9 is the same as the third above Same as the example 9. Direct comparison 1 1 The contact impedance threshold value r C and the contact impedance Γ 〇 line L The impedance value r P of the entire impedance RP becomes the impedance value 1 when the adjusted impedance RP of r P 9 can be directly compared to the tom contact impedance threshold 1 · 1 1 value r C and the contact impedance r, while judging the pen 9 at the same time, and the second Example 1 1-Sample 9 When adjusting the impedance RP directly at the potential connection of the impedance plate 8 9 9 1 1, it has less influence on the degree of resolution of the coordinate detection 0 1 1 Simultaneously 9 In the above example, it is built in the CPU 1 A / D becomes 1 | Example 2 of converter 2 9 But 9 If you can read at least 3 potentials f 1 IAD converter 2 and CPU 1 can also be independent, while> 1 1 1 paper The standard is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) _ Printed by A7 Employee Consumer Cooperative of the Central Escalation Bureau of the Ministry of Economic Affairs A7 ____ B7_ V. Description of invention (27) Use of AD converter 2 or more 2. Furthermore, in the above embodiment, although the potential at both ends of the adjustment impedance RP is obtained from the AD converter 2 and the potential at both ends of the contact impedance r, the threshold value detected from the second potential difference and the first potential difference is compared, It is also possible to input the potential difference at both ends of the adjustment impedance RP and the potential difference at both ends of the contact impedance r into the comparison circuit, compare the second potential difference with the detection threshold value of the next pen, and determine the pen. [Effects of the Invention] As described above, according to the present invention, even if the material of the impedance of the pressure-sensitive dipole and the thickness of the impedance film are different, there is no need to store the detection threshold VT in the ROM in advance. It is possible to adjust the impedance value of the impedance according to the change, easily correct the pen detection threshold value VTR, and perform pen detection under the optimum conditions for each dipole. At the same time, because the threshold value V TR is detected in the next pen to adjust the impedance value r p setting of the impedance R p, there is no need for those skilled in the art to memorize the memory portion in which the threshold value V T is detected in the next pen. In addition, when judging the writing, although the current value of the dipole is different according to the pressing position of the dipole, it is judged by comparing the voltage drop between the contact resistance r and the adjustment resistance R p. Identify the pen without being affected by the pressing position. At the same time, the threshold value VTR is detected in the next pen. If the contact impedance threshold value rc of the dipole can be known in advance, the impedance can be easily set according to the adjusted impedance of the nozzle resistance value r P used in conjunction with this. The size of this paper is applicable to the Chinese National Standard ([阽) Ren 4 specifications (21'0 father 297 mm) _3〇_ Binding line (please read the precautions on the back before filling this page) Employee consumption of the Central Bureau of Standards of the Ministry of Economic Affairs Printed by the cooperative 295645 A7 B7 V. Description of the invention (28) According to the invention described in items 3, 6 and 7 of the patent application, since the adjustment impedance Rp is a variable impedance, the impedance value rP of the adjustment impedance can be easily changed . Therefore, it is possible to experimentally repeat the pen under the dipole, while confirming the movement of the dipole, to change the impedance value rP of the variable impedance, to detect the pressing of the dipole, and it can be set that the change of the adjusted impedance does not appear after detection Under the influence of the pen, the threshold value VTR was detected. Because the threshold VTR is not detected in the next pen, it is obtained by adjusting the variable impedance and the voltage division ratio with other impedances connected in series. Therefore, after setting the threshold VTR under the pen, it is not necessary to A switch used to cut off the aforementioned other impedance from the circuit. According to the invention described in item 5 of the patent application range, the contact resistance r can be changed to the contact impedance threshold value! c. It is judged as the next pen when the next pen detects the threshold value VTR. Use the contact impedance threshold value r = 1 / N impedance value rP / adjusted impedance RP ^ set, so keep the adjusted impedance connected to the impedance plate and move To coordinate detection mode, it has little effect on the coordinate detection circuit. 4. Brief description of the drawings [FIG. 1] It is a circuit diagram of the impedance pressure-sensitive dipole 2 0 according to the first embodiment of the present invention. 〔圚 2〕 It is the equivalent circuit diagram of the impedance-sensitive dipole 20 of 圚 1. This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) _ 3 工 -----— j --- 装 — (Please read the precautions on the back before filling this page) * 11 line A7 B7 printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Description of the invention (29) [囵 3] The circuit diagram of the coordinate detection mode of the impedance-sensitive dipole 2 0 in Fig. 1 showing the coordinate detection mode of the X coordinate. [Figure 4] This is a circuit diagram showing the coordinate detection mode of the Y-coordinate type dipole 2 0 of FIG. [Fig. 5] A circuit diagram showing an impedance-pressure dipole according to a second embodiment of the present invention. [FIG. 6] is a circuit diagram showing an impedance pressure-type dipole 30 according to a third embodiment of the present invention. [FIG. 7] It is the equivalent circuit of the impedance pressure type dipole 30 of FIG. [FIG. 8] A circuit diagram showing an impedance pressure-type dipole 40 according to a fourth embodiment of the present invention. This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (21ΌΧ297mm). I --- 《-^ --- ^ ------ IT— · ----- 0 (Please read the back first Please pay attention to this page and then fill out this page) A 7 _B7_ printed by the consumer cooperation of the Central Prototype Bureau of the Ministry of Economic Affairs A. _B7_ V. Description of the invention (3 (3) [Figure 9] is a circuit diagram showing a conventional impedance pressure-sensitive dipole C Figure 1 0] It is a waveform diagram showing the relationship between the pressure at the pressing point Pi® pressure vP and the detection threshold value ντ at the pressing point according to the pen down. (A) Comparison of the voltage V pi «for the contact impedance safety timing The waveform diagram of the low dipole, (b) is the waveform diagram of the dipole whose voltage V PL is relatively high at the contact impedance time. [囵 1 1] It is the impedance sensing pressure of the state where the threshold value VT is detected by the pen under the display setting Circuit diagram of the type dipole. [Figure 1 2] It is a circuit diagram of the impedance pressure-type dipole showing the state of the pen under detection [Explanation of symbols]
1 CPU 2 A / D變換器 8 X座檫阻抗板 8 a X输入«極 本紙張尺度適用中國國家標準（CNS ) A4規格（21ΌΧ297公釐）00 -00 裝 訂 線 (請先閲讀背面之注意事項再填寫本頁) A7 B7 五、發明説明（31) 8 b X輸出電極 9 Y座標阻抗板 9 a Y輸入電極 9 b Y輸出電極 V tr 下筆檢出臨限值 V CC 基準檢出電壓 V A 第1電位差 V B 第2電位差1 CPU 2 A / D converter 8 X-socket Sassafras impedance board 8 a X input «polar paper size applicable to China National Standard (CNS) A4 specification (21Ό297mm) 00 -00 binding line (please read the notes on the back first (Fill in this page again) A7 B7 5. Description of the invention (31) 8 b X output electrode 9 Y coordinate impedance plate 9 a Y input electrode 9 b Y output electrode V tr Pen detection threshold V CC Reference detection voltage VA 1 potential difference VB 2nd potential difference
Vi 檢出電壓施加側阻抗板的輸入電極之電位 V 2 檢出電壓施加側阻抗板的輸出電極之電位 V 3 接地側阻抗板的輸入電極之電位 N 校正常數 R p 調整阻抗 (請先閲讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消费合作社印製 本紙張尺度逋用中國國家標準（CNS ) A4规格（210X 297公釐） -34 -Vi The potential of the input electrode of the impedance plate on the applied voltage side V 2 The potential of the output electrode of the impedance plate on the applied voltage side V 3 The potential of the input electrode of the impedance plate on the grounded side N Correction constant R p Adjust the impedance (please read the back Please pay attention to this page and then fill out this page) The paper printed by the Staff Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs uses the Chinese National Standard (CNS) A4 specification (210X 297mm) -34-