TWI868559B - Capacitive fingerprint sensing method, capacitive fingerprint sensing module and information processing device - Google Patents
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Abstract
一種電容式指紋感測方法，其包括：使一電容陣列之每兩行感應單元共同耦接一行選擇信號線及使該電容陣列之各列感應單元中的一組奇數感應單元和一組偶數感應單元各自耦接一不同的列選擇信號線；以及使一驅動電路驅動各該行選擇信號線及各該列選擇信號線以感測該電容陣列之一幀感應資料。A capacitive fingerprint sensing method includes: coupling every two rows of sensing units in a capacitor array to a row selection signal line and coupling a group of odd-numbered sensing units and a group of even-numbered sensing units in each row of sensing units in the capacitor array to a different row selection signal line; and driving a driving circuit to drive each row selection signal line and each column selection signal line to sense a frame of sensing data of the capacitor array.
Description
本發明係有關指紋感測，尤指一種電容式指紋感測方案。The present invention relates to fingerprint sensing, and more particularly to a capacitive fingerprint sensing solution.
請參照圖1，其為一現有電容式指紋感測器之電容陣列之示意圖。如圖1所示，該電容陣列具有多個感應單元10、多條列選擇信號線11及多條行選擇信號線12，其中，掛在各條列選擇信號線11上的感應單元10的數目遠大於掛在各條行選擇信號線12上的感應單元10的數目。Please refer to FIG1, which is a schematic diagram of a capacitor array of a conventional capacitive fingerprint sensor. As shown in FIG1, the capacitor array has a plurality of
然而，由於掛在各條列選擇信號線11上的感應單元10的數目遠大於掛在各條行選擇信號線12上的感應單元10的數目，各條列選擇信號線11乃具有較大的負載，致使該驅動電路須具有較強的驅動能力。然而，提高驅動能力卻會增加感測器之製造成本，且會增加功耗。However, since the number of
為解決上述的問題，本領域亟需一新穎的電容式指紋感測架構。To solve the above problems, a novel capacitive fingerprint sensing architecture is urgently needed in the art.
本發明之一目的在於揭露一種電容式指紋感測方法，其可藉由使一電容陣列之每兩行感應單元掛在同一行選擇信號線上及使該電容陣列之各列感應單元中的所有奇數感應單元和所有偶數感應單元對應掛在一不同的列選擇信號線上，有效降低掛在各列選擇信號線上的負載，從而降低一驅動電路之驅動能力要求、製造成本及其功耗。One object of the present invention is to disclose a capacitive fingerprint sensing method, which can effectively reduce the load on each column selection signal line by making every two rows of sensing cells in a capacitor array connected to the same row selection signal line and making all odd-numbered sensing cells and all even-numbered sensing cells in each column of sensing cells in the capacitor array connected to a different column selection signal line, thereby reducing the driving capability requirement, manufacturing cost and power consumption of a driving circuit.
本發明之另一目的在於揭露一種電容式指紋感測模組，其可藉由前述之方法降低其驅動電路之驅動能力要求、製造成本及功耗。Another object of the present invention is to disclose a capacitive fingerprint sensing module, which can reduce the driving capability requirement, manufacturing cost and power consumption of its driving circuit by the aforementioned method.
本發明之又一目的在於揭露一種資訊處理裝置，其可藉由前述之電容式指紋感測模組降低指紋感測之功耗及整體製造成本。Another object of the present invention is to disclose an information processing device that can reduce the power consumption and overall manufacturing cost of fingerprint sensing by using the aforementioned capacitive fingerprint sensing module.
為達上述目的，一種電容式指紋感測方法乃被提出，其包括： 使一電容陣列之每兩行感應單元共同耦接一行選擇信號線及使該電容陣列之各列感應單元中的一組奇數感應單元和一組偶數感應單元各自耦接一不同的列選擇信號線；以及 使一驅動電路驅動各該行選擇信號線及各該列選擇信號線以感測該電容陣列之一幀感應資料。 To achieve the above-mentioned purpose, a capacitive fingerprint sensing method is proposed, which includes: making every two rows of sensing units of a capacitor array commonly coupled to a row selection signal line and making a group of odd-numbered sensing units and a group of even-numbered sensing units in each row of sensing units of the capacitor array respectively coupled to a different column selection signal line; and making a driving circuit drive each of the row selection signal lines and each of the column selection signal lines to sense a frame of sensing data of the capacitor array.
在一實施例中，各所述感應單元均包含一電極。In one embodiment, each of the sensing units includes an electrode.
在一實施例中，各所述感應單元均包含一開關電路。In one embodiment, each of the sensing units includes a switch circuit.
在一實施例中，該電容陣列係形成於一矽基材上。In one embodiment, the capacitor array is formed on a silicon substrate.
為達上述目的，本發明進一步提出一種電容式指紋感測模組，其具有一電容陣列及一驅動電路以驅動該電容陣列，其特徵在於： 該電容陣列之每兩行感應單元耦接同一行選擇信號線，且該電容陣列之各列感應單元中的一組奇數感應單元和一組偶數感應單元各自耦接一不同的列選擇信號線；以及 該驅動電路驅動各該行選擇信號線及各該列選擇信號線以感測該電容陣列之一幀感應資料。 To achieve the above-mentioned purpose, the present invention further proposes a capacitive fingerprint sensing module, which has a capacitor array and a driving circuit to drive the capacitor array, and is characterized in that: Every two rows of sensing units in the capacitor array are coupled to the same row selection signal line, and a group of odd-numbered sensing units and a group of even-numbered sensing units in each row of sensing units in the capacitor array are respectively coupled to a different column selection signal line; and The driving circuit drives each of the row selection signal lines and each of the column selection signal lines to sense a frame of sensing data of the capacitor array.
在一實施例中，各所述感應單元均包含一電極。In one embodiment, each of the sensing units includes an electrode.
在一實施例中，各所述感應單元均包含一開關電路。In one embodiment, each of the sensing units includes a switch circuit.
在一實施例中，該電容陣列係形成於一矽基材上。In one embodiment, the capacitor array is formed on a silicon substrate.
為達上述目的，本發明進一步提出一種資訊處理裝置，其具有一中央處理單元及如前述之電容式指紋感測模組，該中央處理單元係用以與該電容式指紋感測模組通信。To achieve the above object, the present invention further proposes an information processing device having a central processing unit and the capacitive fingerprint sensing module as described above, wherein the central processing unit is used to communicate with the capacitive fingerprint sensing module.
在可能的實施例中，所述之資訊處理裝置可為一智慧型手持裝置、一攜帶型電腦、一穿戴裝置、一車載電腦或一門禁系統。In a possible embodiment, the information processing device may be a smart handheld device, a portable computer, a wearable device, a vehicle-mounted computer or an access control system.
為使 貴審查委員能進一步瞭解本發明之結構、特徵及其目的，茲附以圖式及較佳具體實施例之詳細說明如後。In order to enable the Review Committee to further understand the structure, features and purpose of the present invention, the following are attached with drawings and detailed descriptions of preferred specific embodiments.
本發明之原理在於： (一)使一電容陣列之每兩行感應單元掛在同一行選擇信號線上以減少行選擇信號線的數目；以及 (二)使該電容陣列之各列感應單元中的所有奇數感應單元和所有偶數感應單元對應掛在兩條不同的列選擇信號線上以增加列選擇信號線的數目。 The principles of the present invention are: (i) making every two rows of sensing units in a capacitor array connected to the same row selection signal line to reduce the number of row selection signal lines; and (ii) making all odd-numbered sensing units and all even-numbered sensing units in each row of sensing units in the capacitor array connected to two different column selection signal lines to increase the number of column selection signal lines.
依此，本發明即可有效降低掛在各列選擇信號線上的負載，從而降低一驅動電路之驅動能力要求、製造成本及其功耗。Accordingly, the present invention can effectively reduce the load on each column selection signal line, thereby reducing the driving capability requirement, manufacturing cost and power consumption of a driving circuit.
請參照圖2，其為本發明之電容式指紋感測模組之一實施例之示意圖。如圖2所示，一電容式指紋感測模組100具有一電容陣列110及一驅動電路120以驅動電容陣列110。Please refer to FIG. 2 , which is a schematic diagram of an embodiment of a capacitive fingerprint sensing module of the present invention. As shown in FIG. 2 , a capacitive
電容陣列110具有多個感應單元111、多對列選擇信號線(112a、112b)及多條行選擇信號線113，其中，每兩行感應單元111耦接同一條行選擇信號線113，其情形如圖3a所示；且各列感應單元111中的一組奇數感應單元和一組偶數感應單元對應耦接一對列選擇信號線(112a、112b)，其情形如圖3b所示。The
於操作時，驅動電路120輸出行驅動信號ROW
1~ROW
m以驅動m條行選擇信號線113，及輸出n對列驅動信號(C
1a,C
1b)~(C
na,C
nb)以驅動n列選擇信號線(112a、112b)，從而感測電容陣列110之一幀感應資料，其中，m、n均為大於1之正整數。
During operation, the
另外，感應單元111可包含一電極及一開關電路，其中，該開關電路係用以依所述行驅動信號及列驅動信號之控制選通該電極。另外，電容陣列110可形成於一矽基材上。In addition, the
依此設計，本發明即可有效降低掛在各列選擇信號線(112a或112b)上的負載，從而降低驅動電路120之驅動能力要求、製造成本及其功耗。According to this design, the present invention can effectively reduce the load on each column selection signal line (112a or 112b), thereby reducing the driving capability requirement, manufacturing cost and power consumption of the
由上述的說明可知，本發明揭露了一種電容式指紋感測方法。請參照圖4，其繪示本發明之電容式指紋感測方法之一實施例之流程圖。如圖4所示，該方法包括：使一電容陣列之每兩行感應單元共同耦接一行選擇信號線及使該電容陣列之各列感應單元中的一組奇數感應單元和一組偶數感應單元各自耦接一不同的列選擇信號線(步驟a)；以及使一驅動電路驅動各該行選擇信號線及各該列選擇信號線以感測該電容陣列之一幀感應資料(步驟b)。As can be seen from the above description, the present invention discloses a capacitive fingerprint sensing method. Please refer to FIG4, which shows a flow chart of an embodiment of the capacitive fingerprint sensing method of the present invention. As shown in FIG4, the method includes: coupling every two rows of sensing units of a capacitor array to a row selection signal line and coupling a group of odd-numbered sensing units and a group of even-numbered sensing units in each row of sensing units of the capacitor array to a different row selection signal line (step a); and driving a driving circuit to drive each row selection signal line and each column selection signal line to sense a frame of sensing data of the capacitor array (step b).
在上述的步驟中，各所述感應單元均包含一電極，且各所述感應單元可包含一開關電路。另外，該電容陣列可形成於一矽基材上。In the above steps, each of the sensing units includes an electrode, and each of the sensing units may include a switch circuit. In addition, the capacitor array may be formed on a silicon substrate.
依上述的說明，本發明進一步提出一種資訊處理裝置。請參照圖5，其繪示本發明之資訊處理裝置之一實施例的方塊圖。如圖5所示，一資訊處理裝置200具有一中央處理單元210及一電容式指紋感測模組220，其中，電容式指紋感測模組220係由電容式指紋感測模組100實現，且中央處理單元210係用以與電容式指紋感測模組220。另外，資訊處理裝置200可為一智慧型手持裝置、一攜帶型電腦、一穿戴裝置、一車載電腦或一門禁系統。According to the above description, the present invention further proposes an information processing device. Please refer to FIG. 5, which shows a block diagram of an embodiment of the information processing device of the present invention. As shown in FIG. 5, an
藉由前述所揭露的設計，本發明乃具有以下的優點： 一、本發明之電容式指紋感測方法可可藉由使一電容陣列之每兩行感應單元掛在同一行選擇信號線上及使該電容陣列之各列感應單元中的各奇數感應單元和各偶數感應單元分別掛在一不同的列選擇信號線上，有效降低掛在各列選擇信號線上的負載，從而降低一驅動電路之驅動能力要求、製造成本及其功耗。 二、本發明之電容式指紋感測模組可藉由前述之方法降低其驅動電路之驅動能力要求、製造成本及功耗。 三、本發明之資訊處理裝置可藉由前述之電容式指紋感測模組降低指紋感測之功耗及整體製造成本。 Through the above disclosed design, the present invention has the following advantages: 1. The capacitive fingerprint sensing method of the present invention can effectively reduce the load on each column selection signal line by making every two rows of sensing units in a capacitor array hang on the same row selection signal line and making each odd-numbered sensing unit and each even-numbered sensing unit in each column of the capacitor array hang on a different column selection signal line, thereby reducing the driving capability requirement, manufacturing cost and power consumption of a driving circuit. 2. The capacitive fingerprint sensing module of the present invention can reduce the driving capability requirement, manufacturing cost and power consumption of its driving circuit through the above method. 3. The information processing device of the present invention can reduce the power consumption and overall manufacturing cost of fingerprint sensing by using the aforementioned capacitive fingerprint sensing module.
本案所揭示者，乃較佳實施例，舉凡局部之變更或修飾而源於本案之技術思想而為熟習該項技藝之人所易於推知者，俱不脫本案之專利權範疇。The invention disclosed in this case is a preferred embodiment. Any partial changes or modifications that are derived from the technical concept of this case and are easily inferred by people familiar with the art do not deviate from the scope of the patent rights of this case.
綜上所陳，本案無論目的、手段與功效，皆顯示其迥異於習知技術，且其首先發明合於實用，確實符合發明之專利要件，懇請 貴審查委員明察，並早日賜予專利俾嘉惠社會，是為至禱。In summary, this case shows that its purpose, means and effects are all different from the known technology, and it is the first invention that is practical and indeed meets the patent requirements for invention. We sincerely request the review committee to examine this carefully and grant a patent as soon as possible to benefit the society. This is our utmost prayer.
10:感應單元10: Sensing unit
11:列選擇信號線11: Row selection signal line
12:行選擇信號線12: Row selection signal line
100:電容式指紋感測模組100: Capacitive fingerprint sensing module
110:電容陣列110: Capacitor array
111:感應單元111: Sensing unit
112a:列選擇信號線112a: row selection signal line
112b:列選擇信號線112b: row selection signal line
113:行選擇信號線113: Row selection signal line
120:驅動電路120:Drive circuit
200:資訊處理裝置 200: Information processing device
210:中央處理單元 210: Central processing unit
220:OLED顯示器 220:OLED display
ROW1~ROWm:行驅動信號 ROW 1 ~ROW m : row drive signal
(C1a,C1b)~(Cna,Cnb):列驅動信號 (C 1a ,C 1b )~(C na ,C nb ): row drive signal
ROW1:行驅動信號 ROW 1 : Row drive signal
C1a、C1b:列驅動信號 C 1a , C 1b : Row drive signal
步驟a:使一電容陣列之每兩行感應單元共同耦接一行選擇信號線及使該電容陣列之各列感應單元中的一組奇數感應單元和一組偶數感應單元各自耦接一不同的列選擇信號線 Step a: make every two rows of sensing units in a capacitor array be coupled to a row selection signal line together and make a group of odd-numbered sensing units and a group of even-numbered sensing units in each row of sensing units in the capacitor array be coupled to a different row selection signal line respectively.
步驟b:使一驅動電路驅動各該行選擇信號線及各該列選擇信號線以感測該電容陣列之一幀感應資料 Step b: Use a driving circuit to drive each row selection signal line and each column selection signal line to sense a frame of sensing data of the capacitor array.
圖1為一現有電容式指紋感測器之像素陣列之示意圖。 圖2為本發明之電容式指紋感測模組之一實施例之示意圖。 圖3a為圖2之電容式指紋感測模組之兩行感應單元耦接同一條行選擇信號線之示意圖。 圖3b為圖2之電容式指紋感測模組之一列感應單元中的一組奇數感應單元和一組偶數感應單元對應耦接一對列選擇信號線之示意圖。 圖4繪示本發明之電容式指紋感測方法之一實施例之流程圖。 圖5繪示本發明之資訊處理裝置之一實施例的方塊圖。 FIG. 1 is a schematic diagram of a pixel array of an existing capacitive fingerprint sensor. FIG. 2 is a schematic diagram of an embodiment of a capacitive fingerprint sensing module of the present invention. FIG. 3a is a schematic diagram of two rows of sensing units of the capacitive fingerprint sensing module of FIG. 2 coupled to the same row selection signal line. FIG. 3b is a schematic diagram of a group of odd sensing units and a group of even sensing units in a column of sensing units of the capacitive fingerprint sensing module of FIG. 2 correspondingly coupled to a pair of column selection signal lines. FIG. 4 is a flow chart of an embodiment of a capacitive fingerprint sensing method of the present invention. FIG. 5 is a block diagram of an embodiment of an information processing device of the present invention.
步驟a:使一電容陣列之每兩行感應單元共同耦接一行選擇信號線及使該電容陣列之各列感應單元中的一組奇數感應單元和一組偶數感應單元各自耦接一不同的列選擇信號線 Step a: make every two rows of sensing units in a capacitor array be coupled to a row selection signal line together and make a group of odd-numbered sensing units and a group of even-numbered sensing units in each row of sensing units in the capacitor array be coupled to a different row selection signal line respectively.
步驟b:使一驅動電路驅動各該行選擇信號線及各該列選擇信號線以感測該電容陣列之一幀感應資料 Step b: Use a driving circuit to drive each row selection signal line and each column selection signal line to sense a frame of sensing data of the capacitor array.
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| TW201638832A (en) * | 2015-04-24 | 2016-11-01 | 速博思股份有限公司 | Biometric feature identification device and method |
| TW201638831A (en) * | 2015-04-27 | 2016-11-01 | 瑞鼎科技股份有限公司 | Capacitive fingerprint sensing apparatus and capacitive fingerprint sensing method |
| TWM616810U (en) * | 2020-07-20 | 2021-09-11 | 神盾股份有限公司 | Fingerprint sensing apparatus |
| TWI772210B (en) * | 2019-09-23 | 2022-07-21 | 聯詠科技股份有限公司 | Electronic circuit and electronic apparatus having fingerprint sensing function and method for sensing fingerprint image |
-
2023
- 2023-01-06 TW TW112100651A patent/TWI868559B/en active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201638832A (en) * | 2015-04-24 | 2016-11-01 | 速博思股份有限公司 | Biometric feature identification device and method |
| TW201638831A (en) * | 2015-04-27 | 2016-11-01 | 瑞鼎科技股份有限公司 | Capacitive fingerprint sensing apparatus and capacitive fingerprint sensing method |
| TWI772210B (en) * | 2019-09-23 | 2022-07-21 | 聯詠科技股份有限公司 | Electronic circuit and electronic apparatus having fingerprint sensing function and method for sensing fingerprint image |
| TWM616810U (en) * | 2020-07-20 | 2021-09-11 | 神盾股份有限公司 | Fingerprint sensing apparatus |
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| TW202429316A (en) | 2024-07-16 |
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