TWI575425B - Touch detection apparatus having fingerprint recognition function - Google Patents
Touch detection apparatus having fingerprint recognition function Download PDFInfo
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- TWI575425B TWI575425B TW105111242A TW105111242A TWI575425B TW I575425 B TWI575425 B TW I575425B TW 105111242 A TW105111242 A TW 105111242A TW 105111242 A TW105111242 A TW 105111242A TW I575425 B TWI575425 B TW I575425B
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
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Description
本發明係有關於一種觸控檢測裝置，且特別是關於一種具指紋辨識功能的觸控檢測裝置。 The present invention relates to a touch detection device, and more particularly to a touch detection device having a fingerprint recognition function.
如果行動裝置需要認證使用者，一般作法為設定特定密碼。使用者必須輸入正確的密碼，認證成功後電子裝置才可被使用。近年來，利用指紋辨識裝置來辨識使用者的電子裝置越來越多。因為指紋具有相當高的單一性，亦即，只需要讓指紋辨識裝置記錄使用者的指紋，使用者無須記住特定密碼，因而免於密碼被偷竊或破解的風險。 If the mobile device requires an authenticated user, it is common practice to set a specific password. The user must enter the correct password and the electronic device can be used after successful authentication. In recent years, more and more electronic devices have been identified by fingerprint recognition devices. Because the fingerprint has a relatively high degree of singularity, that is, only the fingerprint recognition device needs to record the user's fingerprint, the user does not need to remember the specific password, thereby avoiding the risk of the password being stolen or cracked.
而現行最為常見的指紋辨識裝置係獨立設置於行動裝置上，例如設置於筆記型電腦鍵盤之固定一側，或設置於行動電話之背側或一端底側的固定位置上。由於均和行動裝置的觸控檢測裝置，如觸控螢幕彼此獨立，必需單獨佈設在行動裝置的螢幕外，佔據行動裝置額外體積，致使無法有效縮減行動裝置之總體積，和行動裝置現行輕、薄、短、小的設計理念不符。 The most common fingerprint identification device is independently installed on the mobile device, for example, on the fixed side of the notebook computer keyboard, or on a fixed position on the back side or the bottom side of the mobile phone. Since the touch detection devices of the mobile device and the touch screen are independent of each other, they must be separately disposed outside the screen of the mobile device, occupying an extra volume of the mobile device, so that the total volume of the mobile device cannot be effectively reduced, and the mobile device is currently light. Thin, short, and small design concepts do not match.
因此，本發明提供一種具指紋辨識功能的觸控檢測裝置，以解決先前技藝中指紋辨識裝置和觸控檢測裝置須分別設置於行動裝置上，致使行動裝置體積無法有效縮減的缺點。 Therefore, the present invention provides a touch detection device with a fingerprint recognition function, which solves the defects that the fingerprint recognition device and the touch detection device must be separately disposed on the mobile device in the prior art, so that the volume of the mobile device cannot be effectively reduced.
本發明內容之一技術態樣是在提供一種具指紋辨識功能的觸控檢測裝置具有一感測電極、一模式選擇電路、一觸控檢測電路和一指紋辨識電路。模式選擇電路耦接感測電極。觸控檢測電路和指紋辨識電路耦接模式選擇電路。模式選擇電路可選擇觸控檢測電路或指紋辨識電路和感測電極耦接。當模式選擇電路選擇指紋辨識電路耦接感測電極時，感測電極以第一分辨率擷取的一使用者指紋資料。當模式選擇電路選擇觸控檢測電路耦接感測電極時，感測電極以第二分辨率擷取觸碰資料進行觸碰位置檢測，其中該第一分辨率大於該第二分辨率。 One aspect of the present invention provides a touch detection device having a fingerprint recognition function having a sensing electrode, a mode selection circuit, a touch detection circuit, and a fingerprint recognition circuit. The mode selection circuit is coupled to the sensing electrode. The touch detection circuit and the fingerprint identification circuit are coupled to the mode selection circuit. The mode selection circuit can be coupled to the touch detection circuit or the fingerprint identification circuit and the sensing electrode. When the mode selection circuit selects the fingerprint identification circuit to be coupled to the sensing electrode, the sensing electrode captures a user fingerprint data at the first resolution. When the mode selection circuit selects the touch detection circuit to be coupled to the sensing electrode, the sensing electrode captures the touch data at the second resolution to perform the touch position detection, wherein the first resolution is greater than the second resolution.
在一實施例中，感測電極更包括複數條第一軸向感測電極，沿一第一軸向排列，複數條第二軸向感測電極，沿一第二軸向排列以及一絕緣層，設置於此些條第一軸向感測電極條和此些條第二軸向感測電極間。其中此些條第一軸向感測電極以及此些條第二軸向感測電極彼此絕緣且交叉排列。 In one embodiment, the sensing electrode further includes a plurality of first axial sensing electrodes arranged along a first axial direction, a plurality of second axial sensing electrodes arranged along a second axial direction and an insulating layer Provided between the first axial sensing electrode strips and the second axial sensing electrodes. Wherein the strips of the first axial sensing electrodes and the strips of the second axial sensing electrodes are insulated from each other and arranged in a cross.
在一實施例中，每一第一軸向感測電極以及每一第二軸向感測電極的電極寬度為50μm，且任兩相鄰第一軸 向感測電極間，和任兩相鄰第二軸向感測電極間之距離是20μm。 In an embodiment, the electrode width of each of the first axial sensing electrodes and each of the second axial sensing electrodes is 50 μm, and any two adjacent first axes The distance between the sensing electrodes and any two adjacent second axial sensing electrodes was 20 μm.
在一實施例中，指紋辨識電路根據一互電容原理驅動此些條第一軸向感測電極以及此些條第二軸向感測電極以擷取此使用者指紋資料。 In an embodiment, the fingerprint identification circuit drives the first axial sensing electrodes and the second axial sensing electrodes according to a mutual capacitance principle to capture the user fingerprint data.
在一實施例中，指紋辨識電路係根據一自電容原理驅動此些條第一軸向感測電極以及此些條第二軸向感測電極以擷取此使用者指紋資料。其中遠離此使用者指紋的此些條第一軸向感測電極或此些條第二軸向感測電極被接地。 In one embodiment, the fingerprint identification circuit drives the first axial sensing electrodes and the second axial sensing electrodes according to a self-capacitance principle to capture the user fingerprint data. The strips of the first axial sensing electrodes or the strips of the second axial sensing electrodes that are remote from the fingerprint of the user are grounded.
在一實施例中，模式選擇電路更包括舵個第一切換元件，分別設置於任兩相鄰第一軸向感測電極，以及任兩相鄰第二軸向感測電極間，當任兩相鄰第一軸向感測電極或任兩相鄰第二軸向感測電極間之第一切換元件被導通時，該任兩相鄰第一軸向感測電極或任兩相鄰第二軸向感測電極形成一並聯結構。 In an embodiment, the mode selection circuit further includes a rudder first switching element respectively disposed between any two adjacent first axial sensing electrodes and between any two adjacent second axial sensing electrodes. When the first switching element between the adjacent first axial sensing electrodes or any two adjacent second axial sensing electrodes is turned on, the two adjacent first axial sensing electrodes or any two adjacent second The axial sensing electrodes form a parallel structure.
在一實施例中，模式選擇電路更根據此第二分辨率，分組此些條第一軸向感測電極和此些條第二軸向感測電極，每一組中之第一切換元件被導通，使得每一組中之此些條第一軸向感測電極和每一組中之此些條第二軸向感測電極形成一並聯結構，以同時接收此觸控檢測電路的一驅動信號。 In an embodiment, the mode selection circuit further groups the first axial sensing electrodes and the second axial sensing electrodes according to the second resolution, and the first switching component in each group is Turning on, such that the first axial sensing electrodes in each group and the second axial sensing electrodes in each group form a parallel structure to simultaneously receive a driving of the touch detecting circuit signal.
在一實施例中，模式選擇電路更包括複數個第二切換元件，分別設置於此些第一軸向感測電極和此觸控檢測 電路，以及此些第二軸向感測電極和此觸控檢測電路間，其中當此模式選擇電路選擇此指紋辨識電路耦接此感測電極時，此些個第二切換元件被斷開，以及，當此模式選擇電路選擇此觸控檢測電路耦接此感測電極時，此些個第二切換元件被導通。 In an embodiment, the mode selection circuit further includes a plurality of second switching elements respectively disposed on the first axial sensing electrodes and the touch detection a circuit, and the second axial sensing electrode and the touch detecting circuit, wherein when the mode selecting circuit selects the fingerprint identifying circuit to be coupled to the sensing electrode, the second switching elements are disconnected, And when the mode selection circuit selects the touch detection circuit to be coupled to the sensing electrode, the second switching elements are turned on.
在一實施例中，此模式選擇電路更包括複數個第三切換元件，分別設置於此些第一軸向感測電極和此指紋辨識電路，以及此些第二軸向感測電極和此指紋辨識電路間，其中當此模式選擇電路選擇此指紋辨識電路耦接此感測電極時，此些個第三切換元件被導通，以及，當此模式選擇電路選擇此觸控檢測電路耦接此感測電極時，此些個第三切換元件被斷開。 In an embodiment, the mode selection circuit further includes a plurality of third switching elements respectively disposed on the first axial sensing electrodes and the fingerprint identification circuit, and the second axial sensing electrodes and the fingerprint Identifying between the circuits, wherein when the mode selection circuit selects the fingerprint identification circuit to be coupled to the sensing electrode, the third switching elements are turned on, and when the mode selection circuit selects the touch detection circuit to couple the sense When the electrodes are measured, the third switching elements are turned off.
綜上所述，本發明之技術方案與現有技術相比具有明顯的優點和有益效果。由於本技術方案是直接將用於觸控檢測的感測電極作為指紋辨識電極，不需於行動裝置上額外佈設指紋辨識電極，因此可讓行動裝置的可顯示區域最大化。再者，因為不需額外進行指紋辨識電極之製作，不需變更原電極的製作流程，在製程上相當方便且節省成本。 In summary, the technical solution of the present invention has obvious advantages and beneficial effects compared with the prior art. Since the present invention directly uses the sensing electrode for touch detection as the fingerprint recognition electrode, it is not necessary to additionally provide a fingerprint recognition electrode on the mobile device, thereby maximizing the displayable area of the mobile device. Furthermore, since it is not necessary to additionally manufacture the fingerprint recognition electrode, it is not necessary to change the fabrication process of the original electrode, which is quite convenient and cost-effective in the process.
以下將以實施方式對上述之說明作詳細的描述，並對本發明之技術方案提供更進一步的解釋。 The above description will be described in detail in the following embodiments, and further explanation of the technical solutions of the present invention will be provided.
100‧‧‧觸控檢測裝置 100‧‧‧Touch detection device
110‧‧‧感測電極 110‧‧‧Sensing electrode
111‧‧‧第一軸向感測電極 111‧‧‧First axial sensing electrode
112‧‧‧第二軸向感測電極 112‧‧‧Second axial sensing electrode
113‧‧‧第一軸向驅動線 113‧‧‧First axial drive line
114‧‧‧第二軸向驅動線 114‧‧‧Second axial drive line
120‧‧‧模式選擇電路 120‧‧‧ mode selection circuit
121‧‧‧第一切換元件 121‧‧‧First switching element
122‧‧‧第二切換元件 122‧‧‧Second switching element
123‧‧‧第三切換元件 123‧‧‧3rd switching element
130‧‧‧觸控檢測電路 130‧‧‧Touch detection circuit
140‧‧‧指紋辨識電路 140‧‧‧Fingerprint identification circuit
為讓本發明之上述和其他目的、特徵、優點與實施 例能更明顯易懂，所附圖式之說明如下：第1圖所示為根據本發明一實施例之具指紋辨識功能的觸控檢測裝置概略圖。 The above and other objects, features, advantages and embodiments of the present invention are made. The example can be more clearly understood, and the description of the drawings is as follows: FIG. 1 is a schematic diagram of a touch detection device with a fingerprint recognition function according to an embodiment of the invention.
第2圖所示是依照本發明一較佳實施例第一軸向感測電極以及第二軸向感測電極的放大圖示。 2 is an enlarged view of a first axial sensing electrode and a second axial sensing electrode in accordance with a preferred embodiment of the present invention.
第3圖所示為根據本發明一較佳實施例的模式選擇電路概略圖示。 Figure 3 is a schematic illustration of a mode selection circuit in accordance with a preferred embodiment of the present invention.
為了使本發明內容之敘述更加詳盡與完備，可參照所附之圖式及以下所述各種實施例，圖式中相同之號碼代表相同或相似之元件。但所提供之實施例並非用以限制本發明所涵蓋的範圍，而結構運作之描述非用以限制其執行之順序，任何由元件重新組合之結構，所產生具有均等功效的裝置，皆為本發明所涵蓋的範圍。 In order to make the description of the present invention more complete and complete, reference is made to the accompanying drawings and the accompanying drawings. However, the embodiments provided are not intended to limit the scope of the invention, and the description of the operation of the structure is not intended to limit the order of its execution, and any device that is recombined by the components produces equal devices. The scope covered by the invention.
其中圖式僅以說明為目的，並未依照原尺寸作圖。另一方面，眾所週知的元件與步驟並未描述於實施例中，以避免對本發明造成不必要的限制。 The drawings are for illustrative purposes only and are not drawn to the original dimensions. On the other hand, well-known elements and steps are not described in the embodiments to avoid unnecessarily limiting the invention.
本發明具指紋辨識功能的觸控檢測裝置是直接將用於觸控檢測的感測電極作為指紋辨識電極，因此，不需於行動裝置上額外佈設指紋辨識電極，可有效縮減行動裝置之總體積。且由於行動裝置上並不需設置用來進行指紋辨識的非顯示區域，因此可讓行動裝置的可顯示區域最大化。再者，因為是直接將用於觸控檢測的感測電極作為指 紋辨識電極，不需額外進行指紋辨識電極之製作，因此不需變更原電極的製作流程，在製程上相當方便且節省時效和製程成本。 The touch detection device with the fingerprint recognition function directly uses the sensing electrode for touch detection as the fingerprint recognition electrode. Therefore, it is not necessary to additionally provide a fingerprint recognition electrode on the mobile device, which can effectively reduce the total volume of the mobile device. . Moreover, since the non-display area for fingerprint recognition is not required to be provided on the mobile device, the displayable area of the mobile device can be maximized. Furthermore, because the sensing electrode for touch detection is directly used as a finger The pattern recognition electrode does not require additional fingerprint identification electrodes, so there is no need to change the original electrode fabrication process, which is quite convenient in the process and saves time and process costs.
第1圖所示為根據本發明一實施例之具指紋辨識功能的觸控檢測裝置概略圖。此觸控檢測裝置100，包括一感測電極110、一模式選擇電路120、一觸控檢測電路130以及一指紋辨識電路140。觸控檢測電路130以及指紋辨識電路140共同耦接到模式選擇電路120，而由模式選擇電路120根據一控制信號，選擇觸控檢測電路130或指紋辨識電路140來和感測電極110耦接。當模式選擇電路120選擇觸控檢測電路130和感測電極110耦接時，感測電極110所擷取的使用者觸摸信號會透過模式選擇電路120傳送給觸控檢測電路130來進行觸控位置檢測。而當模式選擇電路120選擇指紋辨識電路140來和感測電極110耦接時，感測電極110所擷取的使用者指紋影像資料會透過模式選擇電路120傳送給指紋辨識電路140進行比對。 FIG. 1 is a schematic diagram of a touch detection device with a fingerprint recognition function according to an embodiment of the invention. The touch detection device 100 includes a sensing electrode 110, a mode selection circuit 120, a touch detection circuit 130, and a fingerprint recognition circuit 140. The touch detection circuit 130 and the fingerprint identification circuit 140 are coupled to the mode selection circuit 120. The mode selection circuit 120 selects the touch detection circuit 130 or the fingerprint recognition circuit 140 to be coupled to the sensing electrode 110 according to a control signal. When the mode selection circuit 120 selects the touch detection circuit 130 and the sensing electrode 110 to be coupled, the user touch signal captured by the sensing electrode 110 is transmitted to the touch detection circuit 130 through the mode selection circuit 120 for the touch position. Detection. When the mode selection circuit 120 selects the fingerprint identification circuit 140 to be coupled to the sensing electrode 110, the user fingerprint image data captured by the sensing electrode 110 is transmitted to the fingerprint identification circuit 140 through the mode selection circuit 120 for comparison.
其中，感測電極110更包括複數條沿著橫向(例如X軸方向)進行排列的第一軸向感測電極111，以及複數條沿著縱向(例如Y軸方向)進行排列的第二軸向感測電極112，其中第一軸向感測電極111以及第二軸向感測電極112彼此交叉排列，且第一軸向感測電極111和第二軸向感測電極112間設有一透明絕緣層，用以電性隔絕第一軸向感測電極111以及第二軸向感測電極112，因此第一軸向感測電極111以及第二軸向感測電極112彼此絕緣且交叉排列。 而每一第一軸向感測電極111和一第一軸向驅動線113連接，以透過第一軸向驅動線113耦接模式選擇電路120。每一第二軸向感測電極112和一第二軸向驅動線114連接，以透過第二軸向驅動線114耦接模式選擇電路120。在一較佳實施例中，由於本案感測電極110需同時進行觸控位置檢測與指紋影像資料擷取，為使所擷取的指紋影像資料具有一定之分辨率，因此，在一較佳實施例中，如第2圖所示的放大圖示，本案的第一軸向感測電極111以及第二軸向感測電極112的電極寬度W較佳是採用50μm，而任兩相鄰電極間的間距d較佳是採用20μm。 The sensing electrode 110 further includes a plurality of first axial sensing electrodes 111 arranged along a lateral direction (for example, an X-axis direction), and a plurality of second axial axes arranged along a longitudinal direction (for example, a Y-axis direction). The sensing electrode 112, wherein the first axial sensing electrode 111 and the second axial sensing electrode 112 are arranged to cross each other, and a transparent insulation is disposed between the first axial sensing electrode 111 and the second axial sensing electrode 112. The layer is used to electrically isolate the first axial sensing electrode 111 and the second axial sensing electrode 112, and thus the first axial sensing electrode 111 and the second axial sensing electrode 112 are insulated from each other and arranged in a cross arrangement. Each of the first axial sensing electrodes 111 is coupled to a first axial driving line 113 for coupling to the mode selection circuit 120 through the first axial driving line 113. Each of the second axial sensing electrodes 112 is coupled to a second axial driving line 114 for coupling to the mode selection circuit 120 through the second axial driving line 114. In a preferred embodiment, since the sensing electrode 110 needs to simultaneously perform touch position detection and fingerprint image data capture, in order to obtain a certain resolution of the captured fingerprint image data, in a preferred implementation In the example, as shown in the enlarged view of FIG. 2, the electrode width W of the first axial sensing electrode 111 and the second axial sensing electrode 112 of the present invention is preferably 50 μm, and between any two adjacent electrodes. The pitch d is preferably 20 μm.
另一方面，當進行觸控位置檢測時，例如以互電容方式進行觸控位置檢測，通常是依序送出驅動信號驅動其中一軸向的感測電極，並搭配逐條接收另一軸向感測電極上的感應信號來完成每一交錯點的定址，因此感測電極的分辨率會影響掃描檢測時間。為了避免因為擷取指紋影像資料所增加的感測電極分辨率造成觸控反應速度下降，因在一較佳實施例中，本發明更於模式選擇電路120中設置多個第一切換元件，藉以將同一軸向相鄰的複數條感測電極彼此並聯作為單一的感測電極，改變感測電極110分辨率，從指紋辨識時使用的第一分辨率變換成觸控檢測時使用的第二分辨率，其中第一分辨率大於第二分辨率，以在進行觸控位置檢測時提高觸控反應速度。 On the other hand, when the touch position detection is performed, for example, the touch position detection is performed in a mutual capacitance manner, usually, the drive signal is sequentially sent to drive one of the axial sensing electrodes, and the other axial sense is received one by one. The sensing signal on the electrode is used to complete the addressing of each interlaced point, so the resolution of the sensing electrode affects the scan detection time. In order to avoid a decrease in the touch response speed due to the increased sensitivity of the sensing electrode resolution obtained by capturing the fingerprint image data, in a preferred embodiment, the present invention further sets a plurality of first switching elements in the mode selection circuit 120. The plurality of sensing electrodes adjacent to each other in the same axial direction are connected in parallel to each other as a single sensing electrode, and the resolution of the sensing electrode 110 is changed, and the first resolution used in fingerprint recognition is converted into the second resolution used in touch detection. The rate, wherein the first resolution is greater than the second resolution, to improve the touch response speed when performing touch position detection.
第3圖所示為根據本發明一較佳實施例的模式選擇電路概略圖示，其中係以改變第二軸向感測電極112的 分辨率為例來進行說明，然而，同樣之切換電路結構亦可用於切換第一軸向感測電極111中。根據本實施例，兩相鄰之第二軸向驅動線114間設置一第一切換元件121，藉以在進行觸控位置檢測時讓第一切換元件121導通，使得相鄰兩第二軸向感測電極112形成並聯架構共同作為一感測電極，同時接收觸控檢測電路130傳送的驅動信號，來將第二軸向感測電極112的分辨率，從進行指紋辨識時使用的第一分辨率變換成較小第二分辨率以增加觸控反應速度。在一實施例中，以形成寬度400μm的感測電極為例，由於每一第二軸向感測電極112的電極寬度是50μm，而電極間的間距是20μm，因此將以5條第二軸向感測電極112為一組形成並聯結構來共同作為一感測電極，將分辨率從進行指紋辨識時使用的第一分辨率變換成較小第二分辨率。因此，此複數條第二軸向感測電極112會以5條第二軸向感測電極112為一組的方式進行分組，並將每一組中之第一切換元件121導通，使得此組中的5條第二軸向感測電極112形成並聯結構來共同作為一感測電極，再透過一第二切換元件122和觸控檢測電路130耦接。因此，觸控檢測電路130即可透過第二切換元件122將驅動信號同時傳送給同一組並聯的5條第二軸向感測電極112以進行觸控位置檢測。其中，所並聯的第二軸向感測電極112數目並不以本實施例為限，可根據實際使用情況進行調整。 3 is a schematic illustration of a mode selection circuit in accordance with a preferred embodiment of the present invention, wherein the second axial sensing electrode 112 is modified. The resolution is described as an example, however, the same switching circuit configuration can also be used to switch the first axial sensing electrode 111. According to the embodiment, a first switching element 121 is disposed between the two adjacent second axial driving lines 114, so that the first switching element 121 is turned on when the touch position detection is performed, so that the two adjacent second axial senses are The measuring electrodes 112 form a parallel structure together as a sensing electrode, and simultaneously receive the driving signal transmitted by the touch detecting circuit 130 to adjust the resolution of the second axial sensing electrode 112 from the first resolution used for fingerprint recognition. Transform to a smaller second resolution to increase the touch response speed. In one embodiment, taking a sensing electrode having a width of 400 μm as an example, since the electrode width of each second axial sensing electrode 112 is 50 μm and the spacing between the electrodes is 20 μm, five second axes will be used. A pair of sensing electrodes 112 are formed in a parallel structure to collectively function as a sensing electrode, and the resolution is converted from a first resolution used for fingerprint recognition to a smaller second resolution. Therefore, the plurality of second axial sensing electrodes 112 are grouped in a group of five second axial sensing electrodes 112, and the first switching element 121 in each group is turned on, so that the group The five second axial sensing electrodes 112 are formed in parallel to form a sensing electrode, and are coupled to the touch detecting circuit 130 through a second switching component 122. Therefore, the touch detection circuit 130 can simultaneously transmit the driving signal to the same group of five parallel second sensing electrodes 112 through the second switching element 122 for touch position detection. The number of the second axial sensing electrodes 112 connected in parallel is not limited to the embodiment, and may be adjusted according to actual use conditions.
此外，每一第二軸向驅動線114和觸控檢測電路130間設置的第二切換元件122可根據第二軸向感測電極 112的分組狀況，導通對應的第二切換元件122，使得觸控檢測電路130可透過此第二切換元件122將驅動信號傳送給同一組中並聯的第二軸向感測電極112。此外，為配合感測電極分辨率的改變，本發明更以等比例方式進行座標變換來定位觸碰位置，例如，以具有1000條第二軸向感測電極112的觸控面板為例，原本1000條第二軸向感測電極112之位置若分別為1~1000，再以5條第二軸向感測電極112為一組進行分組後，由於係以5：1的比例方式進行座標變換，因此新的感測電極位置將為1~200。 In addition, the second switching element 122 disposed between each of the second axial driving lines 114 and the touch detection circuit 130 may be configured according to the second axial sensing electrode. The grouping condition of 112 turns on the corresponding second switching element 122, so that the touch detection circuit 130 can transmit the driving signal to the second axial sensing electrode 112 connected in parallel in the same group through the second switching element 122. In addition, in order to cope with the change of the resolution of the sensing electrode, the present invention performs coordinate transformation in an equal ratio to locate the touch position. For example, a touch panel having 1000 second axial sensing electrodes 112 is taken as an example. If the positions of the 1000 second axial sensing electrodes 112 are respectively 1 to 1000, and then the 5 second axial sensing electrodes 112 are grouped as a group, the coordinate transformation is performed in a ratio of 5:1. Therefore, the new sensing electrode position will be 1~200.
另一方面，每一第二軸向驅動線114和指紋辨識電路140間更具有一第三切換元件123，因此可透過切換第一切換元件121、第二切換元件122和第三切換元件123，讓第二軸向感測電極112耦接觸控檢測電路130或指紋辨識電路140。例如，當導通第一切換元件121和第二切換元件122而斷開第三切換元件123時，第二軸向感測電極112耦接觸控檢測電路130來進行觸控位置檢測。反之，若導通第三切換元件123而斷開第一切換元件121和第二切換元件122時，第二軸向感測電極112則耦接指紋辨識電路140來進行指紋影像資料的比對。換言之，模式選擇電路120除了可選擇觸控檢測電路130或指紋辨識電路140和感測電極110耦接外，更可在進行觸控位置檢測時改變感測電極110的分辨率以增加增加觸控反應速度。 On the other hand, each of the second axial driving lines 114 and the fingerprint identification circuit 140 further has a third switching element 123, so that the first switching element 121, the second switching element 122 and the third switching element 123 can be switched. The second axial sensing electrode 112 is coupled to the contact detecting circuit 130 or the fingerprint identifying circuit 140. For example, when the first switching element 121 and the second switching element 122 are turned on to turn off the third switching element 123, the second axial sensing electrode 112 is coupled to the contact detecting circuit 130 for touch position detection. On the other hand, when the third switching element 123 is turned on and the first switching element 121 and the second switching element 122 are turned off, the second axial sensing electrode 112 is coupled to the fingerprint identification circuit 140 for comparison of fingerprint image data. In other words, the mode selection circuit 120 can change the resolution of the sensing electrode 110 to increase the touch when the touch position detection is performed, in addition to the touch detection circuit 130 or the fingerprint identification circuit 140 and the sensing electrode 110. reaction speed.
在一較佳實施例中，本發明是以互電容方式驅動感測電極110擷取指紋影像資料。在以第一軸向感測電極111 面對使用者手指指紋的感測電極架構中，當進行互電容方式驅動時，第一軸向感測電極111會被依序驅動，並逐條接收第二軸向感測電極112上的感應信號，由於電容量和距離成反比，因此當使用者手指放到第一軸向感測電極111上時，紋脊與第一軸向感測電極111接觸的部份會有較大的電容量，紋溝的部份電容量則較小，指紋辨識電路140即可透過接收第二軸向感測電極112上的感應信號分辨電容量的大小而感測出指紋影像資料。而在另一實施例中，本發明亦可採用自電容方式進行指紋影像資料擷取，在自電容的驅動方式中，第一軸向感測電極111會被依序驅動，第二軸向感測電極112則接地，依此，指紋辨識電路140即可透過接收第一軸向感測電極111和第二軸向感測電極112，亦即接地間電容量的大小改變而感測出一指紋影像資料。 In a preferred embodiment, the present invention drives the sensing electrode 110 to capture fingerprint image data in a mutual capacitance manner. Sensing the electrode 111 in the first axial direction In the sensing electrode structure facing the fingerprint of the user's finger, when the mutual capacitance mode is driven, the first axial sensing electrodes 111 are sequentially driven, and the sensing on the second axial sensing electrode 112 is received one by one. The signal, because the capacitance is inversely proportional to the distance, when the user's finger is placed on the first axial sensing electrode 111, the portion of the ridge that is in contact with the first axial sensing electrode 111 has a large capacitance. The partial capacitance of the groove is small, and the fingerprint identification circuit 140 can sense the fingerprint image data by receiving the sensing signal on the second axial sensing electrode 112 to distinguish the capacitance. In another embodiment, the present invention can also perform fingerprint image data acquisition by using a self-capacitance method. In the self-capacitance driving mode, the first axial sensing electrodes 111 are sequentially driven, and the second axial sense is sensed. The measuring electrode 112 is grounded. Accordingly, the fingerprint identifying circuit 140 can sense a fingerprint by receiving the first axial sensing electrode 111 and the second axial sensing electrode 112, that is, the magnitude of the capacitance between the groundings. video material.
此外，請再次參閱第1圖，在一實施例中，進行指紋影像擷取區域可事先在感測電極110中加以定義。其中，此指紋影像擷取區可定義於感測電極110任何一部分。當行動裝置被觸發時，於觸控面板的定義位置上會對應顯示此指紋擷取區，且此時模式選擇電路120會選擇指紋辨識電路140和感測電極110耦接，使用者即可將手指按壓於觸控面板上的指紋影像擷取區，藉由感測電極110擷取使用者之指紋影像資料後，由模式選擇電路120傳送給指紋辨識電路140進行比對，於指紋正確時開啟行動通訊裝置之操作功能。當行動通訊裝置開啟後，模式選擇電路120 會選擇觸控檢測電路130和感測電極110耦接，從而進行觸控位置檢測。 In addition, please refer to FIG. 1 again. In an embodiment, the fingerprint image capturing region may be defined in the sensing electrode 110 in advance. The fingerprint image capturing area may be defined in any part of the sensing electrode 110. When the mobile device is triggered, the fingerprint capture area is correspondingly displayed on the defined position of the touch panel, and the mode selection circuit 120 selects the fingerprint identification circuit 140 and the sensing electrode 110 to be coupled, and the user can The finger is pressed against the fingerprint image capturing area on the touch panel, and the fingerprint image data of the user is captured by the sensing electrode 110, and then sent to the fingerprint identification circuit 140 for comparison by the mode selection circuit 120, and is turned on when the fingerprint is correct. The operational function of the mobile communication device. When the mobile communication device is turned on, the mode selection circuit 120 The touch detection circuit 130 and the sensing electrode 110 are coupled to perform touch position detection.
依此，本發明之整合式指紋辨識裝置是直接將用於觸控檢測的感測電極作為指紋辨識電極，不需於行動裝置上額外佈設指紋辨識電極，由於可移除用來進行指紋辨識的非顯示區域，因此可讓行動裝置的可顯示區域最大化。再者，因為不需額外進行指紋辨識電極之製作，因此不需變更原電極的製作流程，在製程上相當方便且節省製程成本。 Accordingly, the integrated fingerprint identification device of the present invention directly uses the sensing electrode for touch detection as a fingerprint recognition electrode, and does not need to additionally provide a fingerprint recognition electrode on the mobile device, since it can be removed for fingerprint identification. Non-display area, thus maximizing the displayable area of the mobile device. Furthermore, since no additional fingerprint recognition electrodes are required, the original electrode fabrication process does not need to be changed, which is quite convenient in the process and saves process cost.
雖然本發明已以實施方式揭露如上，然其並非用以限定本發明，任何所屬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。 The present invention has been disclosed in the above embodiments, and is not intended to limit the invention, and it is intended that various modifications and changes may be made without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.
100‧‧‧觸控檢測裝置 100‧‧‧Touch detection device
110‧‧‧感測電極 110‧‧‧Sensing electrode
111‧‧‧第一軸向感測電極 111‧‧‧First axial sensing electrode
112‧‧‧第二軸向感測電極 112‧‧‧Second axial sensing electrode
113‧‧‧第一軸向驅動線 113‧‧‧First axial drive line
114‧‧‧第二軸向驅動線 114‧‧‧Second axial drive line
120‧‧‧模式選擇電路 120‧‧‧ mode selection circuit
130‧‧‧觸控檢測電路 130‧‧‧Touch detection circuit
140‧‧‧指紋辨識電路 140‧‧‧Fingerprint identification circuit
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| CN110531898A (en) * | 2019-09-20 | 2019-12-03 | 深圳芯启航科技有限公司 | A kind of capacitive induction unit control method, system and device |
| US11062110B2 (en) * | 2019-12-13 | 2021-07-13 | Novatek Microelectronics Corp. | Fingerprint detection device, method and non-transitory computer-readable medium for operating the same |
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- 2016-04-11 TW TW105205003U patent/TWM526119U/en unknown
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070257890A1 (en) * | 2006-05-02 | 2007-11-08 | Apple Computer, Inc. | Multipoint touch surface controller |
| US20080158167A1 (en) * | 2007-01-03 | 2008-07-03 | Apple Computer, Inc. | Simultaneous sensing arrangement |
| TW201104506A (en) * | 2009-06-18 | 2011-02-01 | Wacom Co Ltd | Pointer detection apparatus and pointer detection method |
| TWM526119U (en) * | 2016-01-12 | 2016-07-21 | 宸鴻科技（廈門）有限公司 | Touch detection apparatus having fingerprint recognition function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106959792B (en) | 2023-10-31 |
| TW201725485A (en) | 2017-07-16 |
| CN106959792A (en) | 2017-07-18 |
| TWM526119U (en) | 2016-07-21 |
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