200931304 九、發明說明： 【發明所屬之技術領域】 本發明作係有關一種可校準輸出訊號的觸控面板之訊號傳導 構造’尤指一種可在訊號傳送過程中因應不同之訊號傳導路徑而 去補正該訊號’使從觸控面板各部位置的輸入該訊號，均可獲得 一符合特定規格的輸出訊號者。 【先前技術】 近年來觸控面板已成為一種重要的輸入裝置，它被廣泛應用 〇於配置在液晶顯示器或陰極射線管等顯示幕面上，讓使用者可透 過顯示幕晝面上的指示以手指頭或筆尖等觸控所需位置，藉此來 進行訊號輸入之功能。觸控面板通常包含二片面狀的導電薄膜以 分開一定間隙而對向配置，其中至少有一導電薄膜係被設置於一 可撓性的透明薄膜之上，而另一導電薄膜則被設置於一堅硬基板 的表面，在對向配置的二面之間設有多數平面膠條作為導通及絕 緣之用，並預留粘合區域塗佈黏膠，藉此將二者密封黏接在一起。 o 前述導電薄膜表面上具有由導電物質沉積佈設而成的導電 層，例如是氧化錫銦(indium tin oxide，ΙΤΟ)，而這導電薄膜上的訊 號係透過電接在側面邊緣的銀導路(Sjiver-containing conductive electrode)傳送到訊號處理電路，例如第三圖所示的，在導電薄膜 T上第一部位P1所觸發的訊號，被以最短的傳導距離的第一路徑 D1傳送到銀導路R上，再從該銀導路上的第一訊號輸入點K1將 訊號傳送到該銀導路的線端Μ而輸出，同理，在該導電薄膜上第 200931304 二部位P2所觸發的訊號，將從最短距離的第二路徑D2傳送到該 银導路上再從第一訊號輸入點K2將訊號傳送到該銀導路的線端 Μ而輸出；由前述說明可知，在該導電薄膜上不同位置所觸發的 訊號，會經由不同的傳導路徑而傳送到後續的訊號處理電路，然 而，由於一般的銀導路係以長形的平面箔條而電接配置在前述導 電薄膜的侧緣，且該銀導路本身具有較高的阻抗(jmpedance)，而 阻抗在訊號的傳導過程中將會導致訊號的衰減，因此，當訊號由 〇該銀導路之不同點K1、K2輸人到從線端Μ輸㈣触中，訊號 將承受不同阻抗值的影響而具有不同程度的衰減，特別是在該銀 導路上離輸出線端Μ最遠的部位Κχ與最近的部位Ky，二者之間 的傳送訊號的衰減程度對比更加這結果，如果訊號衰減的 差異嚴重時’將會影響觸控面板上接觸點得準確定位，造成後續 的訊號處理電路在運作上的不娜響；因此，目前大多數的做法 是在該訊號傳送過程中，去執行一個可補正訊號強度的校準程 〇序，以便獲得輸出一符合特定規格的訊號。 許多習知的峨校準方法中，有的是_設有複雜的導電圖 紋(conductive patterns)來重新分配訊號，或在導路中額外地串接 訊號補正電路以控制該重新分配的訊號，以減低這訊號在傳輸過 程中衰減不均勻的現象，其中，例如美國專利第4293734號和 第4,661,655號等專利案所揭露的設置補強電極方法：如第四、 五騎不，係利用在該導電薄膜τ的邊緣附近設置經特別設計之 200931304 複雜圖紋的補強電極R ’而該補強電極具有不同的形狀或長度， 且將多數補強電極設於靠近的中間部位，藉由在中間部位增加設 置多數補強電極以降低該部位訊號傳遞時的衰減值，達到拉近電 極一端與中央部位的傳導訊號電壓值差異之目的；然而這種習知 技術，由於該複雜的圖紋電極之設計及計算方法不易，且其製作 技術難度較高，也很容易在製造生產時發生誤差，以致產生不準 確的訊號校準結果，又，在該導電薄膜邊緣設置這些複雜的導電 ❹圖紋’也將導致觸控面板的作用面積被陷縮成更小。另外，在其 他的訊號校準方法中，還有的是以在該導電薄膜T的邊緣設置一 非平行的彎曲線(non-parallel curved lines)式樣的匯流導路r (Bus-Bar) ’例如第六圖所示，利用這種具有弧形等電位#(b()wed equipotential field)的匯流導路以達訊號校準之目的；這項習知技 術雖然設置簡單，但是在匯流導路訊號輸出端變得窄小，導致電 流訊號被大量消耗是其主要缺點，又，這匯流導路所呈現的彎曲 〇邊緣，使觸控面板外觀顯得極為突兀而不甚美觀，以及將觸控面 板的工作面積陷縮成較小。 【發明内容】 本發明之主要目的係提供一種觸控面板的訊號傳導構造，可 使在觸控面板上各個不同部位所產生的訊號在傳送到銀導路(電極) 的輸出端的訊號傳導路徑中均獲得一約略相同的衰減值，以便獲 得傳導訊號電壓值接近相同的輸出訊號。 根據本發明，該觸控面板的訊號傳導構造乃將其導電薄臈之 200931304 邊緣附近設有複數電阻單元，並令各電阻單元之間彼此具有一適 當間隔以形成訊號傳導通道’使該等電阻單元與訊號傳導通道彼 此互呈交錯地排列設置，並設有一銀導路電接於該等電阻單元與 訊號傳導通道之外侧的導電薄膜邊緣表面上；藉由控制該等電阻 單元的設置位置以及彼此之間的訊號傳導通道大小，以調整該導 電薄膜上各個不同部位之訊號傳導路徑的阻抗值，改善訊號在傳 輸過程中衰減不均勻的現象，使輸出端點可獲得接近相同的傳導 0 訊號電壓值之來自各部位的輸出訊號。 上述電阻單元係為貫穿該導電薄膜的鏤空槽道或孔；前述鏤 空槽道或孔係可利用蝕刻方法來製成。 最好，該等電阻單元係呈長條形，且其長度係由中間部位向 二端邊以非雜騎增加的方絲設，或是使該等訊號傳導通道 的寬度是以由中間部位向二端邊以非線性逐漸減小的方式佈設， 或前述二種方式佈設的混合搭配使用。 Ο 而緊接於後將以一具體實施例繼續說明，以進一步闡明本發 明之創新特徵。 【實施方式】 >后附各_示’該觸控面板的導電薄膜1係被配置在一基 板4的表面上’並於該導電薄膜1的邊緣搭接銀導路6，使觸發 在該導電薄膜上的訊號可透過電接在側邊的銀導路而由其二端緣 、§輸出端61傳送到後續的訊號處理電路；其中，於該導電薄 膜1邊緣且靠近電接的料路6附近設有數道貫穿料電薄膜的 200931304 鏤空槽道(slot)12，且令各鐘空槽道12之間彼此具有一適當間隔 寬度以形成訊號傳導通道(channel)13，使該等槽道12與訊號傳 導通道13彼此互呈交錯地排列設置；前述該導電薄膜1的導電層 係由氧化錫銦(ITO)材料所沉積而成的，所以該等鏤空槽道12可 藉由姓刻方法來達成，這蚀刻加工操作係先在該導電薄膜表面對 欲保留的部分塗佈(或印製)一層阻絕侵蝕的塗料，再將該導電薄模 浸入餘刻液中，例如是鹽酸或硝酸溶液，然後藉由蝕刻去除掉在 0 該導電薄膜上不要的部分，只保留所需的預定部分。 〇 又如所知的，該導電薄膜1及該銀導路6均各具不同的阻抗 特性，且訊號傳導過程中所遭受的阻抗值約略係與訊號傳導通道 的截面積大*呈函數性正比，以及與傳導躲長短呈函數性反 比；因此本發明實施·上述結構設置，運作時可藉由控制該等 鍵空槽道12的長度大小或該等訊號料通道13的寬度大小，以 調整該導電_彳上在各财_位發的峨被傳送到該銀 導路6二側的訊號輸出端61路程中所遭受不同的阻抗值大小，以 便由該導電_ 1各敏_贿細麵碱， 訊號輸出額時均可具備物目_導訊_$ = 的訊號處理電路之運算處理。 平不Η曼續 更具體來說，如第一圖所示，♦ _造_控制該等鏤空槽“長:所:方：控:板: 等細道12喊編物―肖：物非線性逐: 200931304 增加的方式佈設’因此在中間部位具有較短的鏤空槽道12及較密 集的訊號料通道13設置；另如第二圖所示，該訊號傳導構造係 利用調整該等訊號傳導通道13寬度的方式來佈置時，則是將該等 訊號傳導通道13的寬度由中間部位向二端邊以非線性逐漸減小 寬度的方式佈設，因此在中間部位具有較寬的訊號傳導通道 二側部位具有較窄的訊號傳導通道13設置；據此設置，可使在該 導電薄臈1在中間部位的觸發訊號於傳送到該銀導路6中段部位 ❹的路程中所遭受的較小阻抗值，而在該導電薄膜1在邊側部位的 觸發訊號於傳送到該銀導路6邊端部位的路程中所遭受的較大阻 抗值，又軸驗導路6在巾段部賴触的職強度較高於在 邊側部位所接收的訊號，惟該等訊號從該銀導路6上傳送到二侧 的訊號輸出端61時’祕_經不度的傳導行程而遭受不同 大小的阻抗值’產生不同程度的訊號強度衰減，亦即，從該中段 部位輸入的訊號到二側的訊號輸出端61因為具有較長的傳導行 〇程，因此將承受較大的阻抗、產生較多的強度衰減，這結果可使 無論在該導電薄膜1各部位的觸發訊號於傳送到該銀導路6二侧 的訊號輸出端61時，均可獲得接近相同的訊號強度。 綜上所述可知，本創作藉由在導電薄膜之邊緣钱刻成若干彼 此互呈交錯地排列設置的鏤空槽道12及訊號傳導通道13，以對 該銀導路㈣的電接部位提供—修正齡軌號，來補正該銀導 路在各輸人位置的不同阻抗值，f言之’係舰馳面板各部位 200931304 置觸發的滅經前舰號傳導構造傳如輪出峨的過程中生 成在各财_域料職狀有蝴或近㈣峨值，亦= 使訊號具有相同程度的衰減’因此均可獲得 出訊號，達訊號校準之目的- 0、 的輪 【圖式簡單說明】 顯示該等鏤空槽道12的 第一圖係本發明之局部平面圖 佈設方式；200931304 IX. Description of the Invention: [Technical Field] The present invention relates to a signal transmission structure of a touch panel capable of calibrating an output signal, in particular, a signal transmission path that can be corrected in response to a signal transmission process during signal transmission. The signal 'allows the input of the signal from each position of the touch panel to obtain an output signal conforming to a specific specification. [Prior Art] In recent years, touch panels have become an important input device, which is widely used in display screens such as liquid crystal displays or cathode ray tubes, so that users can display the indications on the screen surface. The desired position is touched by a finger or a pen tip to perform signal input. The touch panel usually comprises two planar conductive films arranged opposite to each other with a certain gap, wherein at least one conductive film is disposed on a flexible transparent film, and the other conductive film is disposed on a rigid film. On the surface of the substrate, a plurality of flat strips are provided between the two sides of the opposite side for conducting and insulating, and the adhesive areas are coated with adhesive to seal the two together. o The conductive film has a conductive layer deposited on the surface of the conductive film, such as indium tin oxide, and the signal on the conductive film is electrically connected to the silver guide at the side edge ( The Sjiver-containing conductive electrode is transmitted to the signal processing circuit. For example, the signal triggered by the first portion P1 on the conductive film T is transmitted to the silver guiding path at the first path D1 of the shortest conduction distance. On R, the signal is transmitted from the first signal input point K1 on the silver guide to the line end of the silver guide, and similarly, the signal triggered by the P2 of the second portion of the conductive film on the conductive film will be Transmitting from the second path D2 of the shortest distance to the silver guiding path, and transmitting the signal from the first signal input point K2 to the line end of the silver guiding path, and outputting; as can be seen from the foregoing description, different positions on the conductive film The triggered signal is transmitted to the subsequent signal processing circuit via different conduction paths. However, since the general silver guiding path is electrically connected to the conductive film by the elongated planar foil strip. The side edge, and the silver guide itself has a higher impedance (jmpedance), and the impedance will cause the signal to decay during the signal transmission, therefore, when the signal is lost by the different points K1, K2 of the silver guide When the person touches from the line (4), the signal will withstand different impedance values and have different degrees of attenuation, especially the farthest part of the silver guide from the output line Κχ and the nearest part Ky, two The degree of attenuation of the transmitted signal between the two is more contrasting. If the difference in signal attenuation is severe, 'will affect the accurate positioning of the contact point on the touch panel, causing the subsequent signal processing circuit to operate inaccurately; At present, most of the current practice is to perform a calibration procedure that corrects the signal strength during the signal transmission to obtain a signal that meets a specific specification. Among many conventional 峨 calibration methods, some have complex conductive patterns to redistribute signals, or additionally connect signal correction circuits in the lead to control the redistributed signals to reduce this. The method of accommodating the reinforced electrode during the transmission process, for example, the method of setting the reinforced electrode disclosed in Patent Nos. 4,293, 734 and 4, 661, 655, etc., such as the fourth and fifth riding, is utilized in the conductive film τ. A reinforcing electrode R' of a specially designed 200931304 complex pattern is disposed near the edge, and the reinforcing electrode has a different shape or length, and a plurality of reinforcing electrodes are disposed in the vicinity of the middle portion, by adding a plurality of reinforcing electrodes in the middle portion Decreasing the attenuation value of the signal transmission at the portion to achieve the purpose of narrowing the difference of the conduction signal voltage between one end of the electrode and the central portion; however, this conventional technique is difficult to design and calculate the complicated pattern electrode, and The production technology is more difficult, and it is easy to make errors in the manufacturing process, resulting in inaccurate information. As a result of the calibration, in addition, the arrangement of these complex conductive patterns on the edge of the conductive film will also cause the active area of the touch panel to be trapped to be smaller. In addition, in other signal calibration methods, there is a bus-path r (Bus-Bar) of a non-parallel curved lines pattern at the edge of the conductive film T, for example, the sixth figure. As shown, the confluence path with arc equipotential field (b) is used for signal calibration; this conventional technique is simple to set up, but becomes at the output of the confluence signal. The narrow size, which causes the current signal to be consumed in a large amount is its main disadvantage. Moreover, the curved edge of the converging path makes the appearance of the touch panel extremely sharp and not beautiful, and the working area of the touch panel is shrunk. It is smaller. SUMMARY OF THE INVENTION The main object of the present invention is to provide a signal transmission structure of a touch panel, which can transmit signals generated at different parts of the touch panel to a signal conduction path transmitted to an output end of a silver guide (electrode). Approximately the same attenuation value is obtained to obtain an output signal whose conduction signal voltage value is close to the same. According to the present invention, the signal-conducting structure of the touch panel is provided with a plurality of resistor units in the vicinity of the edge of the 200931304 of the conductive thin layer, and the resistor units are appropriately spaced from each other to form a signal conducting channel to make the resistors The unit and the signal conducting channel are arranged alternately with each other, and a silver guiding path is electrically connected to the edge surface of the conductive film on the outer side of the resistor unit and the signal conducting channel; by controlling the setting position of the resistor unit and The signal conduction channel size between each other is used to adjust the impedance value of the signal conduction path of each different part of the conductive film to improve the attenuation of the signal during transmission, so that the output end point can obtain the same conduction 0 signal. The output value of the voltage value from each part. The resistor unit is a hollow channel or hole penetrating the conductive film; the hollow channel or hole can be formed by an etching method. Preferably, the resistance units are elongated, and the length thereof is set by a square wire which is increased by a non-hetero ride from the intermediate portion to the two end sides, or the width of the signal conduction passages is oriented from the middle portion. The two ends are arranged in a manner in which the nonlinearity is gradually reduced, or a mixture of the two methods described above is used in combination. The following description will continue with a specific embodiment to further clarify the innovative features of the present invention. [Embodiment] > Each of the conductive films 1 of the touch panel is disposed on the surface of a substrate 4, and the silver guide 6 is overlapped at the edge of the conductive film 1, so that the trigger is The signal on the conductive film can be transmitted to the subsequent signal processing circuit through the two-edge edge and the § output terminal 61 through the silver guide wire electrically connected to the side; wherein, at the edge of the conductive film 1 and close to the electrical connection path There are several 200931304 hollow slots 12 extending through the electrical film, and the clock channels 12 are spaced apart from each other to form a signal conduction channel 13 for the channels. 12 and the signal conducting channels 13 are arranged alternately with each other; the conductive layer of the conductive film 1 is deposited by an indium tin oxide (ITO) material, so the hollow channels 12 can be by the surname method In order to achieve this, the etching processing operation first coats (or prints) a layer of corrosion-resistant coating on the surface of the conductive film, and then immerses the conductive thin film in a residual liquid, such as hydrochloric acid or a nitric acid solution. And then removed by etching at 0 Unnecessary portions of the electroconductive film, leaving only a predetermined desired part. As is known, the conductive film 1 and the silver channel 6 each have different impedance characteristics, and the impedance value suffered during signal transmission is approximately proportional to the cross-sectional area of the signal conduction channel. And is inversely proportional to the conduction avoidance length; therefore, the present invention is implemented in the above configuration, and can be adjusted by controlling the length of the key slot 12 or the width of the signal channel 13 during operation. Conductive _ 在 在 在 在 在 在 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨 峨When the signal output amount is available, the signal processing circuit of the object_guide_$= can be processed. More specifically, as shown in the first figure, ♦ _ _ _ control of these hollow slots "long: all: square: control: board: equals 12 shouts - Xiao: matter nonlinear: 200931304 The added mode is arranged 'so there is a shorter hollow channel 12 and a denser signal channel 13 in the middle; as shown in the second figure, the signal conducting structure adjusts the width of the signal conducting channel 13 In the way of arranging, the width of the signal conducting passages 13 is arranged from the intermediate portion to the two end sides in a non-linearly decreasing width, so that the two sides of the wide signal conducting passage have a wide portion at the intermediate portion. The narrower signal conducting channel 13 is disposed; according to this arrangement, the trigger signal at the intermediate portion of the conductive thin plate 1 can be subjected to a smaller impedance value in the path of the middle portion of the silver guiding path 6 When the trigger signal of the conductive film 1 on the side portion is subjected to a large impedance value transmitted to the edge portion of the silver guide path 6, the axial strength of the guide line 6 in the towel portion is relatively high. Higher than received at the side Signals, but when the signals are transmitted from the silver guide 6 to the signal output 61 on the two sides, the secret value of the different magnitudes is generated by the 'secret transmission delay', which results in different levels of signal strength attenuation, that is, The signal input from the middle portion to the signal output terminal 61 on both sides will have a larger impedance and a greater intensity attenuation because of the longer conduction path, which results in the conductive film. 1 When the trigger signal of each part is transmitted to the signal output end 61 of the two sides of the silver guiding path 6, the same signal intensity can be obtained. In summary, the creation is engraved by the edge of the conductive film. a plurality of hollow channels 12 and signal conducting channels 13 arranged in a staggered relationship with each other to provide a corrected age track number for the electrical connection portion of the silver guiding path (4) to correct the difference of the silver guiding path at each input position Impedance value, f's words' is the part of the ship's sleek panel 200931304. The pre-destruction of the ship's transmission structure is triggered in the process of the round-out 生成 生成 生成 生成 生成 生成 生成 生成 生成 生成 生成 生成 生成 生成 生成= make the signal have a phase Degree of attenuation 'can thus obtain a signal, the signal of the calibration object - A round 0, the formula [FIG simple DESCRIPTION FIG displaying a first hollow channel 12 such tie partial plan layout embodiment of the present invention;
第二圖係本發明之另一實施例的局部平面圖 號傳導通道13之佈設； ’顯不該等訊 第三圖係-習知觸控面板之平面圖，顯示在導電薄膜上所 觸發的訊號經由不同的傳導路徑而輸出之運作示意圖； 第四圖係另-習知觸控面板之導電薄臈的平面圖，顯示在 該導電薄膜的邊緣附近設置經特別設計的圖紋電極，· 第五圖亦係另-習知觸控面板之導電薄膜的平面圖，顯示 ❹另-種在導電薄膜的邊緣附近設置經特別設計的圖紋電極；以 及 第六圖係再一習知觸控面板之導電薄膜的平面圖，顯示一 種在導電薄臈的邊緣設置一非平行的彎曲線式樣的匯流導路。 【主要元件符號說明】 導電薄膜1 基板4 銀導路6 訊號輸出端61 鏤空槽道12 訊號傳導通道13 11The second figure is a layout of a partial plan view number conduction channel 13 of another embodiment of the present invention; 'The third picture system of the same type is a plan view of a conventional touch panel, showing that the signal triggered on the conductive film is via Schematic diagram of the operation of the output of different conductive paths; the fourth figure is a plan view of a conductive thin crucible of a conventional touch panel, showing that a specially designed pattern electrode is arranged near the edge of the conductive film, and the fifth figure is also A plan view of a conductive film of another conventional touch panel, showing that a specially designed pattern electrode is disposed near the edge of the conductive film; and a sixth embodiment is another conductive film of the touch panel. The plan view shows a confluent path in which a non-parallel curved line pattern is placed at the edge of the conductive thin crucible. [Main component symbol description] Conductive film 1 Substrate 4 Silver guide 6 Signal output terminal 61 Hollow channel 12 Signal conduction channel 13 11