TWI708171B - Touch panel device and signal attenuation determining and adjustment method thereof - Google Patents
Touch panel device and signal attenuation determining and adjustment method thereof Download PDFInfo
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Abstract
Description
本發明是有關於一種面板裝置,且特別是有關於一種觸控面板裝置及其訊號衰減判斷與調整方法。 The present invention relates to a panel device, and more particularly to a touch panel device and its signal attenuation judgment and adjustment method.
觸控面板裝置,已廣泛應用於手機、電腦及互動式顯示平台等電子裝置上,其具有操作簡單、直接、自然、空間節省等優勢,儼然成為未來主要的人機操作界面。 Touch panel devices have been widely used in electronic devices such as mobile phones, computers, and interactive display platforms. They have the advantages of simple, direct, natural, and space-saving operation, and become the main man-machine interface in the future.
觸控面板裝置主要是藉由觸碰而產生一感應訊號,此感應訊號經過導線傳遞至控制單元,經由處理並計算出此感應訊號所在之座標位置,然後藉由此座標位置對一圖形介面進行操控。為了得知觸控訊號是否為有效訊號,需檢測觸控感應電路是否正常。當觸控感應電路不正常時,訊號傳遞時的阻抗加大,將使輸出之訊號能量強度衰減,進而造成訊號之失真或扭曲,並影響到觸碰動作之判斷。 The touch panel device mainly generates a sensing signal by touching, the sensing signal is transmitted to the control unit through the wire, and the coordinate position of the sensing signal is calculated through processing, and then a graphical interface is performed by the coordinate position Manipulation. In order to know whether the touch signal is a valid signal, it is necessary to check whether the touch sensing circuit is normal. When the touch sensing circuit is abnormal, the impedance of the signal transmission will increase, which will attenuate the energy intensity of the output signal, which will cause distortion or distortion of the signal and affect the judgment of the touch action.
隨著觸控面板裝置的尺寸加大,面板本身之阻抗將變大,此訊號能量衰減的情形會更加嚴重。因此,為了改善觸控訊號異常的情形,需提出更有效解決之道。 As the size of the touch panel device increases, the impedance of the panel itself will increase, and the signal energy attenuation will become more serious. Therefore, in order to improve the situation of abnormal touch signals, it is necessary to propose a more effective solution.
本發明係有關於一種觸控面板裝置及其訊號衰減判斷與調整方法,可根據訊號能量衰減量對應調整觸控感應電路上各量測點的報點門檻值,用以改善異常判斷觸控位置的情形。 The present invention relates to a touch panel device and its signal attenuation judgment and adjustment method. According to the signal energy attenuation, the threshold value of each measurement point on the touch sensing circuit can be adjusted correspondingly to improve the abnormal judgment of the touch position Situation.
根據本發明之一方面,提出一種觸控面板裝置,包括一觸控感應電路、多數個第一導線以及一控制單元。觸控感應電路包括多數個第一電極串,其中各個第一電極串具有一第一端部、複數個量測點以及一第二端部。多數個第一導線連接於相對應的各個第一電極串的第一端部與第二端部。控制單元與此些第一導線電性連接,用以接收各個第一電極串的此些量測點的電壓訊號,其中控制單元判斷此些第一導線之一導線發生一訊號衰減事件時,對應調整連接此導線的第一電極串的此些量測點的報點門檻值。 According to one aspect of the present invention, a touch panel device is provided, including a touch sensing circuit, a plurality of first wires, and a control unit. The touch sensing circuit includes a plurality of first electrode strings, and each of the first electrode strings has a first end, a plurality of measurement points, and a second end. The plurality of first wires are connected to the first end and the second end of each corresponding first electrode string. The control unit is electrically connected to the first wires for receiving the voltage signals of the measuring points of the first electrode strings. When the control unit determines that a signal attenuation event occurs on one of the first wires, it corresponds to Adjust the reporting threshold of the measurement points of the first electrode string connected to the wire.
根據本發明之一方面,提出一種觸控面板裝置的訊號衰減判斷與調整方法,包括下列步驟。接收複數個量測點的電壓訊號。計算該些量測點的訊號衰減變化率,以判斷是否發生一訊號衰減事件。當存在有訊號衰減事件時,根據相對應的此些量測點的訊號能量,對應調整此些量測點的報點門檻值。 According to one aspect of the present invention, a method for determining and adjusting signal attenuation of a touch panel device is provided, which includes the following steps. Receive voltage signals from multiple measuring points. Calculate the signal attenuation rate of change at these measurement points to determine whether a signal attenuation event occurs. When there is a signal attenuation event, according to the signal energy of the corresponding measurement points, correspondingly adjust the reporting point thresholds of these measurement points.
為了對本發明之上述及其他方面有更佳的瞭解,下文特舉實施例,並配合所附圖式詳細說明如下: In order to have a better understanding of the above and other aspects of the present invention, the following specific examples are given in conjunction with the accompanying drawings to describe in detail as follows:
100:觸控面板裝置 100: Touch panel device
102:觸控感應電路 102: Touch sensing circuit
104:控制單元 104: control unit
108:第一電極串 108: The first electrode string
108a:第一端部 108a: first end
108b:第二端部 108b: second end
110:第二電極串 110: second electrode string
110b:端部 110b: end
112:第一導線 112: First wire
113:異常導線 113: Abnormal Wire
114:導線 114: Wire
115:正常導線 115: normal wire
116:第二導線 116: second wire
A1、B1:報點門檻值 A1, B1: reporting threshold
T1、Ti、Ti-1:訊號能量 T1, Ti, Ti-1: signal energy
Si、Si-1:報點門檻曲線 Si, Si-1: threshold curve for reporting points
A:斷點 A: Breakpoint
△y/△x:衰減變化率 △y/△x: Attenuation rate of change
R1至Rm:量測點 R1 to Rm: measuring point
n、m:數量 n, m: quantity
X、Y:方向 X, Y: direction
(R1,T1)、(R1,Tn)、(Rm,T1)、(Rm,Tn):座標點 (R1,T1), (R1,Tn), (Rm,T1), (Rm,Tn): coordinate point
(Ti-1x1,Ti-1y1)、(Tix1,Tiy1)、(Ti-1xm,Ti-1ym)、(Tixm,Tiym):座標點 (T i-1 x 1 ,T i-1 y 1 ), (T i x 1 ,T i y 1 ), (T i-1 x m ,T i-1 ym), (T i xm,T i ym): coordinate point
第1圖繪示依照本發明一實施例的觸控面板裝置的示意圖。 FIG. 1 is a schematic diagram of a touch panel device according to an embodiment of the invention.
第2圖繪示依照本發明一實施例的正常導線的訊號能量分布的示意圖。 FIG. 2 is a schematic diagram of the signal energy distribution of a normal wire according to an embodiment of the invention.
第3A圖繪示依照本發明一實施例的透過訊號衰減變化率(例如斜率)判斷是否有一異常導線的訊號能量分布的示意圖。 FIG. 3A is a schematic diagram showing the signal energy distribution of determining whether there is an abnormal wire according to the signal attenuation change rate (such as the slope) according to an embodiment of the present invention.
第3B圖繪示依照本發明一實施例的正常導線與異常導線的訊號能量分布的示意圖。 FIG. 3B is a schematic diagram of the signal energy distribution of a normal wire and an abnormal wire according to an embodiment of the present invention.
第4圖繪示依照本發明一實施例的觸控面板裝置的訊號衰減判斷與調整方法的示意圖。 FIG. 4 is a schematic diagram of a method for determining and adjusting signal attenuation of a touch panel device according to an embodiment of the invention.
以下係提出實施例進行詳細說明,實施例僅用以作為範例說明,並非用以限縮本發明欲保護之範圍。以下是以相同/類似的符號表示相同/類似的元件做說明。以下實施例中所提到的方向用語,例如:上、下、左、右、前或後等,僅是參考所附圖式的方向。因此,使用的方向用語是用來說明並非用來限制本發明。 The following examples are provided for detailed description. The examples are only used as examples for description, and are not intended to limit the scope of the present invention. In the following description, the same/similar symbols represent the same/similar elements. The directional terms mentioned in the following embodiments, for example: up, down, left, right, front or back, etc., are only the directions with reference to the accompanying drawings. Therefore, the directional terms used are used to illustrate but not to limit the present invention.
請參照第1圖,依照本發明之一實施例,觸控面板裝置100可包括一觸控感應電路102、複數個第一導線112、複數
個第二導線116以及一控制單元104。觸控感應電路102包含複數個第一電極串108與第二電極串110所交織構成之感測元件陣列,其係用以產生觸控訊號。
Please refer to FIG. 1, according to an embodiment of the present invention, the
第一電極串108沿X方向延伸且排列成列1至列n之複數列之電極串,其中n為一整數,其表示觸控感應電路102之列數。各第一電極串108具有一第一端部108a以及一第二端部108b,且各個第一電極串108具有多數個量測點R1至Rm設置於第一端部108a與第二端部108b之間。此外,第一導線112設置於觸控感應電路102的兩側,且連接於相對應之各第一電極串108的第一端部108a和第二端部108b,使各個第一電極串108與其相對應之第一導線112間構成封閉迴路,藉此有效地提昇觸控訊號之能量強度,其中T1至Tn表示控制單元104經由各第一導線112於量測點R1至Rm上所測得的訊號能量(例如電壓訊號),n為一整數,其表示觸控感應電路102之列數。
The
第二電極串110沿Y方向延伸且排列成行1至行m之複數行之電極串,其中m為一整數,其表示觸控感應電路102之行數。此外,第二導線116可設置於的一側(例如下側),且各第二電極串110之一端部110b連接於相對應之第二導線116而連接於控制單元104。然而,在另一實施例中,第二導線116亦可設置於觸控感應電路102的兩側(例如上下側),且連接於相對應之各第二電極串110之二端部以構成封閉迴路,本發明對此不加以限制。在一實施範例中,X和Y可相互垂直。
The
第一電極串108與第二電極串110包含複數個串接之電極(圖未繪示),其可以一透明材質所組成,而該透明材質之一實施範例可為氧化銦錫。觸控面板裝置100可為電阻式觸控面板裝置或電容式觸控面板裝置,而其中以電容式觸控面板裝置為較佳。
The
各第一導線112連接對應之導線114而連接於控制單元104,藉以將訊號輸入至控制單元104,或自控制單元104輸出訊號。控制單元104用於控制觸控感應電路102以及計算觸控感應電路102所感測之觸控訊號之位置,提供一人機操作界面之輸入/輸出處理。
Each
請參照第1及2圖,控制單元104可接收各個第一電極串108的此些量測點的電壓訊號(訊號能量),以產生一能量測試圖,其中X座標為量測點R1至Rm的位置,Y座標為各個量測點R1至Rm上的電壓訊號,量測點R1至Rm上的電壓訊號可經由方程式轉換成相對應的數值或能量單元,以繪製出n條曲線的訊號能量。例如,在第2圖中,Ti表示第i條曲線的訊號能量,在正常狀態下,各個量測點R1至Rm的訊號能量Ti由左右兩側向中央遞減,即相對兩側的量測點的訊號能量高於中央的量測點的訊號能量。控制單元104可預先設定一報點門檻曲線Si,當觸發一觸控訊號後測得的訊號能量Ti低於報點門檻曲線Si時,則判斷一觸控事件發生。
Please refer to Figures 1 and 2, the
然而,請參照第1及3A圖,當第一導線112發生一斷點(如圖中所示之A點處)而存在一異常導線113時,異常導線113僅有一側可傳輸訊號能量,因此控制單元104所接收到的訊號能量的強度降低。如第3A圖所示,其中第i條曲線上各量測點的訊號能量Ti由於訊號衰減由左向右沿著X方向遞減,造成控制單元104接收到的訊號能量Ti低於報點門檻曲線Si,故控制單元104無法正常判斷一觸控事件是否發生。
However, referring to Figures 1 and 3A, when the
對此,本實施例提出一種觸控面板裝置的訊號衰減判斷與調整方法,可根據訊號能量衰減量調整各量測點的報點門檻值,用以改善異常判斷觸控位置的情形。 In this regard, this embodiment provides a method for determining and adjusting the signal attenuation of a touch panel device, which can adjust the threshold value of each measurement point according to the attenuation of the signal energy, so as to improve the situation of abnormally determining the touch position.
請一併參照第1、3A及4圖,其中第4圖中的訊號衰減判斷與調整方法可包括下列步驟S11-S15。在步驟S11中,接收多個量測點R1至Rm的電壓訊號。在步驟S12中,計算此些量測點R1至Rm的訊號衰減變化率。在步驟S13中,判斷此些第一導線112之一導線是否發生一訊號衰減事件。在步驟S14中,當存在有訊號衰減事件時,調整此些量測點R1至Rm的報點門檻值。在步驟S15中,接收觸控感測訊號,以判斷一觸控位置。
Please refer to Figures 1, 3A, and 4 together. The signal attenuation judgment and adjustment method in Figure 4 may include the following steps S11-S15. In step S11, the voltage signals of a plurality of measurement points R1 to Rm are received. In step S12, the rate of change of signal attenuation at these measurement points R1 to Rm is calculated. In step S13, it is determined whether a signal attenuation event occurs in one of the
在步驟S11中,各條的訊號能量Ti例如是經由排列成列1至列n的左側第一導線112依序傳輸一電壓訊號至觸控感應電路102,再通過排列成行1至行m的各個量測點至右側的第一導線112,並接收右側的第一導線112所回傳的訊號能量,以判斷各量測點R1至Rm的訊號能量Ti。
In step S11, each signal energy Ti transmits a voltage signal to the
在本實施例中,由於各第一導線112與相對應的第一電極串108構成一封閉迴路,因此各量測點R1至Rm的訊號能量Ti會隨著訊號傳遞的距離增加而減少。在步驟S12中,計算多個量測點R1至Rm的訊號衰減變化率更包括計算n條訊號能量的衰減變化率的平均值,n為第一導線112的數量,以得到一參考值,此參考值可根據觸控感應電路102的特性調整使其大於或等於訊號衰減變化率的平均值,例如根據各廠商生產的觸控感應電路102的參數及靈敏度來調高或調低參考值,使其符合實際操作要求。請參照第3A圖,(0,1400)與(81,1390)表示為第一條訊號能量T1於量測點R1與Rm的座標及訊號能量,(0,930)與(81,310)表示為第i條訊號能量Ti於量測點R1與Rm的座標及訊號能量,先計算n條訊號能量的衰減變化率,即斜率△y/△x,其中n-1條訊號能量的斜率△y/△x大致上相等,例如為(1390-1400)/(81-0)=-0.12,衰減變化率的平均值約為-0.12,另外一條訊能量的斜率△y/△x為(310-930)/(81-0)=-7.65,明顯大於所有訊號能量的衰減變化率的平均值,例如大於平均值的2倍至10倍,由此可知該條訊號能量不正常。因此,在本實施例中,例如計算上述n條訊號能量的斜率的平均值,可得到一參考值。當斜率△y/△x為正時,表示訊號能量由R1往Rm遞增,當斜率△y/△x為負時,表示訊號能量由R1往Rm遞減。計算參考值或所有斜率的平均值時,可以各斜率的絕對值來計算。在後續步驟S13中,控制單元104可根據各條訊號能量
的訊號衰減變化率(△y/△x)與所有訊號能量的訊號衰減變化率的平均值的關係來判斷第一導線112中是否存在一異常導線113。
In this embodiment, since each
在步驟S13中,當其中一條訊號能量Ti的衰減變化率大於參考值或所有斜率的平均值時,表示第一導線112中存在一異常導線113。因此,控制單元104根據此條訊號能量Ti的衰減變化率,判斷是否有一訊號衰減事件(例如單邊斷線事件)發生。在另一實施例中,本發明不限定以斜率△y/△x的大小來判斷是否發生單邊斷線事件,亦可藉由此條訊號能量Ti的電壓降來判斷是否發生單邊斷線事件,例如當其中一條訊號能量Ti的電壓降大於一參考值,例如衰減至電壓值的2/3或其他值,即可判斷是否有一訊號衰減事件發生。
In step S13, when the attenuation change rate of one of the signal energy Ti is greater than the reference value or the average value of all slopes, it indicates that an
此外,當存在有訊號衰減事件時,控制單元104還可藉由比較相鄰兩條訊號能量Ti-1、Ti之間的比值來調整各個量測點R1至Rm的報點門檻值。
In addition, when there is a signal attenuation event, the
請參照第1及3B圖,Ti-1表示第i-1條曲線的訊號能量,Ti表示第i條曲線的訊號能量。如第1圖所示,第一導線112包含相鄰的一正常導線115及一異常導線113,其中Ti-1y1為正常導線115於其第一量測點R1(Ti-1x1)的訊號能量,Tiy1為異常導線113於其第一量測點R1(Tix1)的訊號能量。計算正常導線115與異常導線113於各自的第一量測點R1的訊號能量的比值,即比值Tiy1/Ti-1y1,並依照此比值Tiy1/Ti-1y1對應調整異常導線113於其第一量測點R1(Tix1)的報點門檻值,也就是說,第一量測
點R1(Tix1)與R1(Ti-1x1)的報點門檻值(B1/A1)正比於比值Tiy1/Ti-1y1。同理可知,正常導線115與異常導線113於其餘量測點R2至Rm上的報點門檻值也是根據相對應量測點R2至Rm上的訊號能量的比值來調整。其中,Si表示對應第i條訊號能量的報點門檻曲線,Si-1表示對應第i-1條訊號能量的報點門檻曲線。
Please refer to Figures 1 and 3B, Ti-1 represents the signal energy of the i-1th curve, and Ti represents the signal energy of the i-th curve. As shown in Figure 1, the
此外,Ti-1ym為正常導線115於第m個量測點Rm(Ti-1xm)的訊號能量,Tiym為異常導線113於第m個量測點Rm(Tixm)的訊號能量。計算正常導線115與異常導線113於第m個量測點Rm的訊號能量的比值,即比值Tiym/Ti-1ym,並依照此比值Tiym/Ti-1ym對應調整異常導線113於第m個量測點Rm的報點門檻值。
In addition, T i-1 y m is the signal energy of the
舉例來說,正常導線115於第一量測點R1的報點門檻值為1100能量單位,當無觸控訊號時,訊號能量為1200能量單位,當有觸控訊號時,訊號能量為1050能量單位,小於報點門檻值,因此可得知一觸控事件發生。
For example, the reporting threshold of the
當有訊號衰減事件(例如單邊斷線事件)發生時,異常導線113與正常導線115於第一量測點R1的訊號能量的比值為77.5%,則對應調整異常導線113於第一量測點R1的報點門檻值為1100能量單位x 77.5%,得到852.5能量單位。此時,當異常導線113上無觸控訊號時,訊號能量為930能量單位,當異常導線113上有觸控訊號時,訊號能量為840能量單位,小於報點門檻值,因此可得知一觸控事件發生。反之,則無。
When a signal attenuation event (such as a unilateral disconnection event) occurs, the ratio of the signal energy of the
此外,異常導線113與正常導線115於第m個量測點Rm的訊號能量的比值為27%,則對應調整異常導線113於第m個量測點Rm的報點門檻值為1100能量單位x 27%,得到297能量單位。此時,當異常導線113上無觸控訊號時,訊號能量為315能量單位,當異常導線113上有觸控訊號時,訊號能量為280能量單位,小於報點門檻值,因此可得知一觸控事件發生。反之,則無。
In addition, if the ratio of the signal energy of the
另外,本實施例還可設定訊號能量的比值不得低於一預設值。例如,當異常導線113與正常導線115的訊號能量的比值低於10%時,因訊號能量過低,則不對報點門檻值進行調整。
In addition, this embodiment can also set the signal energy ratio not to be lower than a preset value. For example, when the ratio of the signal energy of the
本發明上述實施例所揭露之觸控面板裝置及其訊號衰減判斷與調整方法,可根據訊號能量衰減量對應調整各量測點的報點門檻值,用以改善異常判斷觸控位置的情形。此外,即使發生單邊斷線事件,觸控面板裝置仍可正常使用,因而使用壽命可增長。 The touch panel device and its signal attenuation judgment and adjustment method disclosed in the above embodiments of the present invention can adjust the threshold value of each measurement point according to the signal energy attenuation, so as to improve the situation of abnormally judging the touch position. In addition, even if a unilateral disconnection event occurs, the touch panel device can still be used normally, so the service life can be increased.
綜上所述,雖然本發明已以實施例揭露如上,然其並非用以限定本發明。本發明所屬技術領域中具有通常知識者,在不脫離本發明之精神和範圍內,當可作各種之更動與潤飾。因此,本發明之保護範圍當視後附之申請專利範圍所界定者為準。 In summary, although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Those who have ordinary knowledge in the technical field to which the present invention belongs can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to those defined by the attached patent application scope.
100:觸控面板裝置 100: Touch panel device
102:觸控感應電路 102: Touch sensing circuit
104:控制單元 104: control unit
108:第一電極串 108: The first electrode string
108a:第一端部 108a: first end
108b:第二端部 108b: second end
R1至Rm:量測點 R1 to Rm: measuring point
T1至Tn:訊號能量 T1 to Tn: signal energy
110:第二電極串 110: second electrode string
110b:端部 110b: end
112:第一導線 112: First wire
113:異常導線 113: Abnormal Wire
114:導線 114: Wire
115:正常導線 115: normal wire
116:第二導線 116: second wire
A:斷點 A: Breakpoint
n、m:數量 n, m: quantity
X、Y:方向 X, Y: direction
(R1,T1)、(R1,Tn)、(Rm,T1)、(Rm,Tn):座標點 (R1,T1), (R1,Tn), (Rm,T1), (Rm,Tn): coordinate point
Claims (9)
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CN104459400A (en) * | 2014-12-08 | 2015-03-25 | 深圳市华星光电技术有限公司 | Detection circuit and detection method used for self-contained touch screen |
CN104808859A (en) * | 2015-05-08 | 2015-07-29 | 厦门天马微电子有限公司 | Embedded type touch panel and touch display device |
TW201612709A (en) * | 2014-09-25 | 2016-04-01 | Hosiden Corp | Touch sensing device with grouped electrodes for determination of target objects with a predetermined size |
WO2016106785A1 (en) * | 2014-12-30 | 2016-07-07 | 深圳市华星光电技术有限公司 | Display panel having touch function and fault detection method |
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TW201635121A (en) * | 2013-12-05 | 2016-10-01 | 禾瑞亞科技股份有限公司 | System for determining mistaken approaching or touching event |
TW201612709A (en) * | 2014-09-25 | 2016-04-01 | Hosiden Corp | Touch sensing device with grouped electrodes for determination of target objects with a predetermined size |
CN104459400A (en) * | 2014-12-08 | 2015-03-25 | 深圳市华星光电技术有限公司 | Detection circuit and detection method used for self-contained touch screen |
WO2016106785A1 (en) * | 2014-12-30 | 2016-07-07 | 深圳市华星光电技术有限公司 | Display panel having touch function and fault detection method |
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