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TWI711951B - Touch sensing unit and fingerprint touch apparatus appling the touch sensing unit - Google Patents

Touch sensing unit and fingerprint touch apparatus appling the touch sensing unit Download PDF

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Publication number
TWI711951B
TWI711951B TW105129057A TW105129057A TWI711951B TW I711951 B TWI711951 B TW I711951B TW 105129057 A TW105129057 A TW 105129057A TW 105129057 A TW105129057 A TW 105129057A TW I711951 B TWI711951 B TW I711951B
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terminal
electrically coupled
scan
transistor
lines
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TW105129057A
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TW201809996A (en
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黃日鋒
戴亞翔
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仟融科技股份有限公司
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Priority to CN201710605989.2A priority patent/CN107807757B/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Image Input (AREA)

Abstract

A fingerprint touch apparatus includes a plurality of readout lines, a plurality of scanning lines, a scan driving circuit, processing circuit and a plurality of touch sensing units. The scan driving circuit is electrically coupled to the scanning line. The processing circuit is electrically coupled to the readout lines. Each of the touch sensing units includes a metallic foil, a first transistor and a second transistor. The first transistor comprises a first terminal, a second terminal and a first control terminal. The first terminal and the first control terminal are electrically coupled to a first scanning line of the plurality of scanning lines, and the second terminal is electrically coupled to the metallic foil. The second transistor comprises a third terminal, a fourth terminal and a second control terminal. The second control terminal is electrically coupled to the metallic foil, the third terminal is electrically coupled to a first readout line of the plurality of readout lines, and the fourth terminal is electrically coupled to a second scanning line of the plurality of scanning lines.

Description

觸控感測單元及具有該觸控感測單元的指紋觸控裝置 Touch sensing unit and fingerprint touch device with the touch sensing unit

本發明是有關於一種觸控面板，特別是一種觸控感測單元及具有該觸控感測單元的指紋觸控裝置。 The invention relates to a touch panel, in particular to a touch sensing unit and a fingerprint touch device having the touch sensing unit.

觸控面板可依其偵測觸控點的物理原理，主要分為電阻式(resistive)觸控面板及電容式(capacitive)觸控面板兩種。電阻式觸控面板係用手指或觸控筆輕按就會產生電壓；而電容式觸控面板係以手指接觸面板而吸取微小的電流方式操作。其中，目前又以電容式觸控面板較為廣泛使用。 Touch panels can be classified into resistive touch panels and capacitive touch panels based on their physical principles for detecting touch points. Resistive touch panels generate voltage when lightly pressed with a finger or stylus; while capacitive touch panels operate in a way that a finger touches the panel and draws a tiny current. Among them, capacitive touch panels are now widely used.

再者，電容式觸控面板又以自感或互感的方式來偵測觸控事件。互感的方式是使用具有偵測出X方向的座標之第一電極，以及用以偵測出Y方向的座標之第二電極，並需經過第一電極與第二電極搭配以完成偵測。而自感的方式則是經由每一電極本身的電壓傳送與接收來完成偵測。由於，在施加有電壓之電極上形成電場，此時，若以手指等碰觸時，接觸位置經由人體的靜電電容而接地。結果會在電極的端子與接觸位置之間產生電容值的變化，進而取得觸控位置的座標。 Furthermore, the capacitive touch panel detects touch events by means of self-inductance or mutual inductance. The method of mutual inductance is to use a first electrode that detects the coordinates in the X direction and a second electrode to detect the coordinates in the Y direction, and the first electrode and the second electrode are matched to complete the detection. The self-induction method is to complete the detection through the voltage transmission and reception of each electrode itself. Since an electric field is formed on the electrode to which a voltage is applied, if a finger is touched at this time, the contact position is grounded via the electrostatic capacitance of the human body. As a result, the capacitance value changes between the terminal of the electrode and the contact position, thereby obtaining the coordinates of the touch position.

不同於習知觸控面板的架構，本發明之一目的在提供一種觸控感測單元，包括：金屬電極、第一電晶體及第二電晶體。第一電晶 體具有第一端、第二端及第一控制端，第一控制端及第一端電性耦接第一掃描線，而第二端電性耦接金屬電極。第二電晶體具有第三端、第四端及第二控制端，第二控制端電性耦接金屬電極，第三端電性耦接讀取線，而第四端電性耦接第二掃描線。 Different from the structure of the conventional touch panel, one object of the present invention is to provide a touch sensing unit including: a metal electrode, a first transistor, and a second transistor. First Dianjing The body has a first end, a second end and a first control end. The first control end and the first end are electrically coupled to the first scan line, and the second end is electrically coupled to the metal electrode. The second transistor has a third terminal, a fourth terminal, and a second control terminal. The second control terminal is electrically coupled to the metal electrode, the third terminal is electrically coupled to the read line, and the fourth terminal is electrically coupled to the second Scan line.

本發明之一實施例提供具有前述觸控感測單元的指紋觸控裝置，包括：多條讀取線、多條掃描線、掃描驅動電路、處理電路及多個觸控感測單元。掃描驅動電路電性耦接此些掃描線。處理電路電性耦接此些讀取線。多個觸控感測單元，其中每一觸控感測單元包括：金屬電極、第一電晶體及第二電晶體。第一電晶體具有第一端、第二端及第一控制端，第一控制端及第一端電性耦接此些掃描線中之第一掃描線，而第二端電性耦接金屬電極。第二電晶體具有第三端、第四端及第二控制端，第二控制端電性耦接金屬電極，第三端電性耦接此些讀取線之第一讀取線，而第四端電性耦接此些掃描線中之第二掃描線。 An embodiment of the present invention provides a fingerprint touch device with the aforementioned touch sensing unit, including: a plurality of read lines, a plurality of scan lines, a scan driving circuit, a processing circuit, and a plurality of touch sensing units. The scan driving circuit is electrically coupled to these scan lines. The processing circuit is electrically coupled to these read lines. A plurality of touch sensing units, each of which includes a metal electrode, a first transistor and a second transistor. The first transistor has a first terminal, a second terminal, and a first control terminal. The first control terminal and the first terminal are electrically coupled to the first scan line of the scan lines, and the second terminal is electrically coupled to the metal electrode. The second transistor has a third terminal, a fourth terminal, and a second control terminal. The second control terminal is electrically coupled to the metal electrode, the third terminal is electrically coupled to the first read line of the read lines, and the first The four terminals are electrically coupled to the second scan line among the scan lines.

本發明之一實施例提供另一種觸控感測單元，包括：金屬電極、第一電晶體及第二電晶體。第一電晶體具有第一端、第二端及第一控制端，第一控制端電性耦接第一掃描線，第一端電性耦接預設電壓，而第二端電性耦接金屬電極。第二電晶體具有第三端、第四端及第二控制端，第二控制端電性耦接金屬電極，第三端電性耦接讀取線，而第四端電性耦接第二掃描線。 An embodiment of the present invention provides another touch sensing unit, including a metal electrode, a first transistor, and a second transistor. The first transistor has a first terminal, a second terminal, and a first control terminal. The first control terminal is electrically coupled to the first scan line, the first terminal is electrically coupled to a predetermined voltage, and the second terminal is electrically coupled to Metal electrode. The second transistor has a third terminal, a fourth terminal, and a second control terminal. The second control terminal is electrically coupled to the metal electrode, the third terminal is electrically coupled to the read line, and the fourth terminal is electrically coupled to the second Scan line.

本發明之一實施例又提供一種指紋觸控裝置，包括：多條讀取線、多條掃描線、掃描驅動電路、處理電路及多個觸控感測單元。掃描驅動電路電性耦接此些掃描線。處理電路電性耦接此些讀取線。多個觸控感測單元，其中每一觸控感測單元包括：金屬電極、第一電晶體及第二電晶體。第一電晶體具有一第一端、第二端及第一控制端，第一控制端電性耦接此些掃描線中之第一掃描線，第一端電性耦接預設電壓，而第二端電性耦接金屬電極。第二電晶體具有第三端、第四端及第二控制端，第二控制端電性耦接金屬電極，第三端電性耦接此些讀取線 之第一讀取線，而第四端電性耦接此些掃描線中之第二掃描線。 An embodiment of the present invention further provides a fingerprint touch device, including: a plurality of read lines, a plurality of scan lines, a scan driving circuit, a processing circuit, and a plurality of touch sensing units. The scan driving circuit is electrically coupled to these scan lines. The processing circuit is electrically coupled to these read lines. A plurality of touch sensing units, each of which includes a metal electrode, a first transistor and a second transistor. The first transistor has a first terminal, a second terminal, and a first control terminal. The first control terminal is electrically coupled to the first scan line among the scan lines, the first terminal is electrically coupled to the predetermined voltage, and The second terminal is electrically coupled to the metal electrode. The second transistor has a third terminal, a fourth terminal, and a second control terminal. The second control terminal is electrically coupled to the metal electrode, and the third terminal is electrically coupled to the read lines The first read line, and the fourth terminal is electrically coupled to the second scan line of the scan lines.

本發明之一實施例還提供一種指紋觸控裝置，包括：觸控層、掃描驅動電路及處理電路。觸控層包括：多條讀取、多條掃描線及多個觸控感測單元。其中，每一觸控感測單元包括：金屬電極、第一電晶體及第二電晶體。第一電晶體具有第一端、第二端及第一控制端，第一控制端及第一端電性耦接此些掃描線中之第一掃描線，而第二端電性耦接金屬電極。第二電晶體具有第三端、第四端及第二控制端，第二控制端電性耦接金屬電極，第三端電性耦接此些讀取線中之第一讀取線，而第四端電性耦接此些掃描線中之第二掃描線。掃描驅動電路電性耦接此些掃描線。處理電路電性耦接此些讀取線，處理電路透過第一讀取線讀取觸控感測單元之感測資料。 An embodiment of the present invention also provides a fingerprint touch device, including: a touch layer, a scan driving circuit, and a processing circuit. The touch layer includes: multiple reading lines, multiple scan lines, and multiple touch sensing units. Among them, each touch sensing unit includes: a metal electrode, a first transistor, and a second transistor. The first transistor has a first terminal, a second terminal, and a first control terminal. The first control terminal and the first terminal are electrically coupled to the first scan line of the scan lines, and the second terminal is electrically coupled to the metal electrode. The second transistor has a third terminal, a fourth terminal, and a second control terminal. The second control terminal is electrically coupled to the metal electrode, and the third terminal is electrically coupled to the first read line among the read lines, and The fourth terminal is electrically coupled to the second scan line among the scan lines. The scan driving circuit is electrically coupled to these scan lines. The processing circuit is electrically coupled to these read lines, and the processing circuit reads the sensing data of the touch sensing unit through the first read line.

本發明的指紋觸控裝置中每一觸控感測單元包括金屬電極、第一電晶體及第二電晶體的電路結構，利用波峰所形成的感應電容釋放的電荷量會大於手指的波谷所形成的感應電容釋放的電荷量，而在每一列觸控感測單元的感測資料會在下一級掃描線的致能期間藉由處理電路分別透過讀取線讀取感測資料。因此，指紋觸控裝置能偵測是否發生指紋接觸事件，並根據感測資料建構成的資料畫面得到指紋圖案。 此外，還可藉由增加指紋觸控裝置之觸控層的厚度，而降低耦合電容對指紋觸控裝置電路的干擾。 In the fingerprint touch device of the present invention, each touch sensing unit includes a metal electrode, a first transistor, and a circuit structure of a second transistor. The amount of charge released by the inductive capacitance formed by the wave crest is greater than that formed by the wave trough of the finger The amount of charge released by the sensing capacitor, and the sensing data of each row of touch sensing units will be read through the read lines by the processing circuit during the enabling period of the next level of scan lines. Therefore, the fingerprint touch device can detect whether a fingerprint contact event occurs, and obtain a fingerprint pattern based on the data screen constructed from the sensing data. In addition, by increasing the thickness of the touch layer of the fingerprint touch device, the interference of the coupling capacitor on the circuit of the fingerprint touch device can be reduced.

100、200、300、400:指紋觸控裝置 100, 200, 300, 400: Fingerprint touch device

10、10B:觸控感測單元 10.10B: Touch sensing unit

11:金屬電極 11: Metal electrode

12、T1:第一電晶體 12. T1: the first transistor

13、T2:第二電晶體 13. T2: second transistor

20:掃描驅動電路 20: Scanning drive circuit

30:處理電路 30: Processing circuit

50:觸控層 50: Touch layer

60:放大電路 60: Amplifying circuit

G1~Gm:掃描線 G1~Gm: scan line

R1~Rn:讀取線 R1~Rn: read line

P1、P2、P3:掃描脈衝 P1, P2, P3: scan pulse

Cf:感應電容 Cf: Sensing capacitance

VSET:預設電壓 V SET : preset voltage

圖1為本發明第一實施例之指紋觸控裝置的電路圖。 FIG. 1 is a circuit diagram of the fingerprint touch device according to the first embodiment of the present invention.

圖2繪示為圖1之指紋觸控裝置的訊號時序圖。 FIG. 2 is a signal timing diagram of the fingerprint touch device of FIG. 1. FIG.

圖3為當本發明一實施例之指紋觸控裝置發生指紋接觸事件時的示意圖。 3 is a schematic diagram when a fingerprint contact event occurs in the fingerprint touch device of an embodiment of the present invention.

圖4為本發明第二實施例之指紋觸控裝置的電路圖。 4 is a circuit diagram of a fingerprint touch device according to a second embodiment of the invention.

圖5為本發明一實施態樣之指紋觸控裝置的電路圖。 FIG. 5 is a circuit diagram of a fingerprint touch device according to an embodiment of the present invention.

圖6為本發明另一實施態樣之指紋觸控裝置的電路圖。 6 is a circuit diagram of a fingerprint touch device according to another embodiment of the present invention.

圖1為本發明第一實施例之指紋觸控裝置100的電路圖。請參照圖1，指紋觸控裝置100包括：觸控層50、掃描驅動電路20及處理電路30。觸控層50包括：多條讀取線R1~Rn、多條掃描線G1~Gm及多個觸控感測單元10。呈矩陣排列的感測單元10係分別電性耦接掃描線G1~Gm與讀取線R1~Rn。其中，每一觸控感測單元10包括：金屬電極11、第一電晶體12及第二電晶體13。第一電晶體12具有第一端、第二端及第一控制端，第二電晶體13具有第三端、第四端及第二控制端。第一電晶體12之第一控制端及第一端電性耦接其中一掃描線，第二端電性耦接金屬電極11，第二電晶體13之第三端電性耦接其中一讀取線，第二控制端電性耦接金屬電極11，第四端電性耦接下一級的掃描線。 FIG. 1 is a circuit diagram of a fingerprint touch device 100 according to the first embodiment of the present invention. Please refer to FIG. 1, the fingerprint touch device 100 includes a touch layer 50, a scan driving circuit 20 and a processing circuit 30. The touch layer 50 includes a plurality of reading lines R1 ˜Rn, a plurality of scanning lines G1 ˜Gm, and a plurality of touch sensing units 10. The sensing units 10 arranged in a matrix are electrically coupled to the scan lines G1 to Gm and the read lines R1 to Rn, respectively. Among them, each touch sensing unit 10 includes: a metal electrode 11, a first transistor 12 and a second transistor 13. The first transistor 12 has a first end, a second end and a first control end, and the second transistor 13 has a third end, a fourth end and a second control end. The first control terminal and the first terminal of the first transistor 12 are electrically coupled to one of the scan lines, the second terminal is electrically coupled to the metal electrode 11, and the third terminal of the second transistor 13 is electrically coupled to one of the scanning lines. Taking the line, the second control terminal is electrically coupled to the metal electrode 11, and the fourth terminal is electrically coupled to the scan line of the next stage.

接下來，說明指紋觸控裝置100其電路的運作方式，並以第一列第一欄、第二列第一欄及第三列之觸控感測單元10舉例說明。對於第一列第一欄的觸控感測單元10來說，第一電晶體12之第一控制端及第一端電性耦接掃描線中之第一掃描線G1，並第二電晶體13之第三端電性耦接讀取線R1，第四端電性耦接第二掃描線G2，而第二列第一欄的觸控感測單元10之第一電晶體12之第一控制端及第一端電性耦接第二掃描線G2，且第三端電性耦接讀取線R1，第四端電性耦接第三掃描線G3。也就是說，第一列之觸控感測單元10的第二電晶體13之第四端會電性耦接第二列之觸控感測單元10的第一電晶體12之第一控制端及第一端。 Next, the operation mode of the circuit of the fingerprint touch device 100 will be described, and the touch sensing units 10 in the first row, the first column, the second row, and the third row are taken as examples. For the touch sensing unit 10 in the first row and the first column, the first control terminal and the first terminal of the first transistor 12 are electrically coupled to the first scan line G1 in the scan line, and the second transistor The third terminal of 13 is electrically coupled to the read line R1, the fourth terminal is electrically coupled to the second scan line G2, and the first transistor 12 of the touch sensor unit 10 in the first column of the second row The control terminal and the first terminal are electrically coupled to the second scan line G2, the third terminal is electrically coupled to the read line R1, and the fourth terminal is electrically coupled to the third scan line G3. That is, the fourth end of the second transistor 13 of the touch sensing unit 10 in the first row is electrically coupled to the first control end of the first transistor 12 of the touch sensing unit 10 in the second row And the first end.

圖2繪示為圖1之顯示面板的訊號時序圖。接下來，請合併參照圖1及圖2，掃描驅動電路20提供第一掃描脈衝P1至第一掃描線G1及提供第二掃描脈衝P2至第二掃描線G2，且第一掃描脈衝P1 的致能期間與第二掃描脈衝P2的致能期間不重疊。詳言之，每一級掃描線的掃描脈衝的致能期間在前一級掃描線的掃描脈衝之後，並且每一級掃描線的掃描脈衝不會與前一級掃描線的掃描脈衝重疊。 FIG. 2 is a signal timing diagram of the display panel of FIG. 1. Next, referring to FIGS. 1 and 2, the scan driving circuit 20 provides the first scan pulse P1 to the first scan line G1 and provides the second scan pulse P2 to the second scan line G2, and the first scan pulse P1 The enabling period of P2 does not overlap with the enabling period of the second scan pulse P2. In detail, the enable period of the scan pulse of each scan line is after the scan pulse of the previous scan line, and the scan pulse of each scan line does not overlap with the scan pulse of the previous scan line.

當掃描驅動電路20提供第一掃描脈衝P1至第一掃描線G1，第一電晶體12導通而施加電壓到金屬電極11進而導通第二電晶體13。在此假設手指是以波谷接觸到第一列第一欄的觸控感測單元10，則通過金屬電極11的電壓會對經由接觸位置通過人體而接地所響應的感應電容充電，然而此時因第二掃描線G2為低準位，又第二電晶體13的源極係耦接至第二掃描線G2，以致於由第二電晶體13之閘極流向汲極至讀取線R1的電流極微小甚至可忽略。 When the scan driving circuit 20 provides the first scan pulse P1 to the first scan line G1, the first transistor 12 is turned on and a voltage is applied to the metal electrode 11 to turn on the second transistor 13. It is assumed here that the finger touches the touch sensing unit 10 in the first column and the first column with a wave trough, and the voltage passing through the metal electrode 11 will charge the inductive capacitance in response to the grounding through the human body through the contact position. The second scan line G2 is at a low level, and the source of the second transistor 13 is coupled to the second scan line G2, so that the current flows from the gate of the second transistor 13 to the drain to the read line R1 Very small or even negligible.

接著，當掃描驅動電路20提供第二掃描脈衝P2至第二掃描線G2，在第二掃描線G2致能的期間，第一列第一欄的觸控感測單元10的第二電晶體13之源極雖為高準位，但由於手指是以波谷接觸到第一列第一欄的觸控感測單元10，因而其感應電容所充的電荷值不足以導通第一列第一欄的第二電晶體13，因而處理電路30透過讀取線R1所讀取之感測資料近乎等於零電流。 Next, when the scan driving circuit 20 provides the second scan pulse P2 to the second scan line G2, during the period when the second scan line G2 is enabled, the second transistor 13 of the touch sensing unit 10 in the first column and the first column Although the source is at a high level, because the finger touches the touch sensing unit 10 in the first column and the first column through the wave trough, the charge value charged by the sensing capacitor is not enough to turn on the first column and the first column. For the second transistor 13, the sensing data read by the processing circuit 30 through the read line R1 is almost equal to zero current.

此時，假設手指是以波峰接觸到第二列第一欄的觸控感測單元10，當第一電晶體12受第二掃描脈衝P2導通而施加電壓到金屬電極11並導通第二電晶體13時，則通過金屬電極11的電壓對所響應的感應電容充電，然而此時因第三掃描線G3為低準位，又第二電晶體13的源極係耦接至第三掃描線G3，以致於由第二電晶體13之閘極流向汲極至讀取線R1的電流極微小甚至可忽略。 At this time, it is assumed that the finger touches the touch sensing unit 10 in the first column of the second row with a wave crest. When the first transistor 12 is turned on by the second scan pulse P2, a voltage is applied to the metal electrode 11 and the second transistor is turned on At 13:00, the voltage of the metal electrode 11 is used to charge the corresponding sensing capacitor. However, at this time, because the third scan line G3 is at a low level, the source of the second transistor 13 is coupled to the third scan line G3. , So that the current flowing from the gate of the second transistor 13 to the drain to the read line R1 is extremely small or even negligible.

接著，當掃描驅動電路20提供掃描脈衝P3至第三掃描線G3時，在第三掃描線G3致能的期間，第二列第一欄的觸控感測單元10的第二電晶體13之源極為高準位，且由於手指是以波峰接觸到第二列第一欄的觸控感測單元10，因而其感應電容所充的電荷值將足以導通第二列第一欄的第二電晶體13而放電，此時處理電路30得以透過讀取 線R1讀取到第二列第一欄的觸控感測單元10的感測資料，同時第三列第一欄的觸控感測單元10之第一電晶體12導通並施加電壓到金屬電極11而導通第二電晶體13進而對所響應的感應電容充電。以此類推，經前述說明，本領域通常知識者應可得知本發明之指紋觸控裝置100的第k列觸控感測單元10的感測資料是在第k+1條掃描線G(k+1)的致能期間藉由處理電路30分別透過讀取線R1~Rn讀取感測資料，其中k為正整數且小於m。因此，指紋觸控裝置100能偵測是否發生指紋接觸事件，並根據感測資料建構成的資料畫面得到指紋圖案。 Then, when the scan driving circuit 20 provides the scan pulse P3 to the third scan line G3, during the period when the third scan line G3 is enabled, one of the second transistors 13 of the touch sensing unit 10 in the first column of the second row The source is extremely high, and because the finger touches the touch sensing unit 10 in the first column of the second row with a wave crest, the charge value charged by its sensing capacitor will be sufficient to conduct the second battery in the first column of the second row. The crystal 13 discharges, and the processing circuit 30 can read through The line R1 reads the sensing data of the touch sensor unit 10 in the first column of the second row, and the first transistor 12 of the touch sensor unit 10 in the first column of the third row is turned on and applies a voltage to the metal electrode 11 and turn on the second transistor 13 to charge the corresponding inductive capacitance. By analogy, after the foregoing description, those skilled in the art should know that the sensing data of the k-th row of touch-sensing units 10 of the fingerprint touch device 100 of the present invention is on the k+1-th scan line G( During the enabling period of k+1), the processing circuit 30 reads the sensing data through the read lines R1 to Rn, where k is a positive integer and less than m. Therefore, the fingerprint touch device 100 can detect whether a fingerprint contact event occurs, and obtain a fingerprint pattern based on the data frame constructed from the sensing data.

進一步說明，圖3為當本發明一實施例之指紋觸控裝置發生指紋接觸事件時的示意圖。請參照圖3，基於公式(1)Q=C*V，其中Q為儲存在電容器電極的電荷量，以及公式(2)C=ε A/d，其中ε是介電質的電容率，A是平板的面積，而d是二平行板間隔的距離，因此可推論得知，由手指的波峰所形成的感應電容Cf將會大於手指的波谷所形成的感應電容Cf，並且波峰所形成的感應電容Cf釋放的電荷量會大於手指的波谷所形成的感應電容Cf釋放的電荷量。 To further illustrate, FIG. 3 is a schematic diagram when a fingerprint contact event occurs in the fingerprint touch device of an embodiment of the present invention. Please refer to Figure 3, based on the formula (1) Q=C*V, where Q is the amount of charge stored in the capacitor electrode, and formula (2) C= ε A/d, where ε is the permittivity of the dielectric, A Is the area of the plate, and d is the distance between the two parallel plates. Therefore, it can be inferred that the inductive capacitance Cf formed by the crest of the finger will be greater than the inductive capacitance Cf formed by the valley of the finger, and the inductive capacitance formed by the crest The amount of charge released by the capacitor Cf will be greater than the amount of charge released by the sensing capacitor Cf formed by the valley of a finger.

圖4為本發明第二實施例之指紋觸控裝置200的電路圖。請參照圖4，第二實施例之指紋觸控裝置200與第一實施例之指紋觸控裝置100不同之處在於，第一實施例之觸控感測單元10的第一電晶體12之第一控制端及第一端電性耦接同一條掃描線，而第二實施例之觸控感測單元10B的第一電晶體12之第一控制端分別電性耦接至掃描線，第一端電性耦接預設電壓VSET。其中，預設電壓VSET可以是由處理電路30提供的直流準位，且預設電壓VSET的準位為大於或等於掃描脈衝的致能準位。由於第二實施例之指紋觸控裝置200與第一實施例之指紋觸控裝置100之電路運作原理大致相同，在此不再贅述。 4 is a circuit diagram of a fingerprint touch device 200 according to a second embodiment of the invention. 4, the fingerprint touch device 200 of the second embodiment is different from the fingerprint touch device 100 of the first embodiment in that the first transistor 12 of the touch sensor unit 10 of the first embodiment is A control terminal and a first terminal are electrically coupled to the same scan line, and the first control terminal of the first transistor 12 of the touch sensing unit 10B of the second embodiment is electrically coupled to the scan line, respectively. The terminal is electrically coupled to the preset voltage V SET . The preset voltage V SET may be a DC level provided by the processing circuit 30, and the level of the preset voltage V SET is greater than or equal to the enable level of the scan pulse. Since the circuit operation principle of the fingerprint touch device 200 of the second embodiment is substantially the same as that of the fingerprint touch device 100 of the first embodiment, it will not be repeated here.

值得一提的是，藉由公式(2)可知，手指之波峰與波谷所響應的感應電容的大小會與指紋觸控裝置100/200所搭配之觸控層50的厚度有關。在第一實施例之指紋觸控裝置100中，若觸控層50的厚 度增加，則需拉高掃描驅動電路所提供的掃描脈衝之致能準位，以致於使通過第一電晶體12而施加到金屬電極11的電壓對感應電容充電後，仍可維持於波峰所形成的感應電容Cf釋放的電荷量能導通第二電晶體13，而波谷所形成的感應電容Cf釋放的電荷量不足以導通第二電晶體13。 It is worth mentioning that, according to formula (2), the size of the sensing capacitance in response to the peaks and valleys of the finger is related to the thickness of the touch layer 50 matched with the fingerprint touch device 100/200. In the fingerprint touch device 100 of the first embodiment, if the touch layer 50 is thick When the temperature increases, the enable level of the scan pulse provided by the scan driving circuit needs to be pulled up, so that the voltage applied to the metal electrode 11 through the first transistor 12 can still be maintained at the peak after charging the sensing capacitor. The amount of charge released by the formed induction capacitor Cf can conduct the second transistor 13, while the amount of charge released by the induction capacitor Cf formed by the trough is insufficient to conduct the second transistor 13.

特別注意的是，在第二實施例之指紋觸控裝置200中，若觸控層50的厚度增加，則僅需拉高預設電壓VSET的直流準位，以致於使通過第一電晶體12而施加到金屬電極11的電壓對感應電容充電後，仍可維持於波峰所形成的感應電容Cf釋放的電荷量能導通第二電晶體13，而波谷所形成的感應電容Cf釋放的電荷量不足以導通第二電晶體13。並且，在第二實施例之指紋觸控裝置200中，可降低掃描驅動電路所提供的掃描脈衝之致能準位而節省電力消耗，掃描脈衝之致能準位只要能導通第一電晶體12即可。其中，觸控層50包括玻璃蓋板，當觸控層50的厚度增加，則產生於感測單元的耦合電容愈小，進而降低對指紋觸控裝置電路的干擾。 It is particularly noted that, in the fingerprint touch device 200 of the second embodiment, if the thickness of the touch layer 50 increases, only the DC level of the preset voltage V SET needs to be pulled up, so that the first transistor 12. After the voltage applied to the metal electrode 11 charges the sensing capacitor, it can still maintain the charge released by the sensing capacitor Cf formed by the peak can conduct the second transistor 13, and the charge released by the sensing capacitor Cf formed by the trough It is not enough to turn on the second transistor 13. In addition, in the fingerprint touch device 200 of the second embodiment, the enable level of the scan pulse provided by the scan driving circuit can be reduced to save power consumption. The enable level of the scan pulse can only turn on the first transistor 12 OK. Wherein, the touch layer 50 includes a glass cover. When the thickness of the touch layer 50 increases, the coupling capacitance generated in the sensing unit becomes smaller, thereby reducing the interference to the fingerprint touch device circuit.

圖5為本發明一實施態樣之指紋觸控裝置300的電路圖。請參照圖5，指紋觸控裝置300與前述之指紋觸控裝置100/200不同之處在於，指紋觸控裝置300還包括多個放大電路60分別電性耦接於讀取線R1~Rn及處理電路30之間。放大電路60包括：第一輸入端、第二輸入端及輸出端。第一輸入端電性耦接讀取線，用以接收讀取線讀取之感測資料。第二輸入端電性耦接參考電位。輸出端電性耦接處理電路30。其中，參考電位可為接地電位。藉由將讀取線R1~Rn所讀取的感測資料放大再傳送到處理電路30，指紋觸控裝置300能更準確的偵測是否發生指紋接觸事件，並根據感測資料建構成的資料畫面得到指紋圖案。 FIG. 5 is a circuit diagram of a fingerprint touch device 300 according to an embodiment of the present invention. 5, the fingerprint touch device 300 is different from the aforementioned fingerprint touch device 100/200 in that the fingerprint touch device 300 also includes a plurality of amplifying circuits 60 electrically coupled to the reading lines R1~Rn and Between processing circuit 30. The amplifying circuit 60 includes: a first input terminal, a second input terminal, and an output terminal. The first input terminal is electrically coupled to the read line for receiving sensing data read by the read line. The second input terminal is electrically coupled to the reference potential. The output terminal is electrically coupled to the processing circuit 30. Among them, the reference potential may be the ground potential. By amplifying the sensing data read by the reading lines R1~Rn and sending it to the processing circuit 30, the fingerprint touch device 300 can more accurately detect whether a fingerprint contact event has occurred, and construct data based on the sensing data The screen gets the fingerprint pattern.

圖6為本發明另一實施態樣之指紋觸控裝置的電路圖。請參照圖6，指紋觸控裝置400與第二實施例之指紋觸控裝置200不同之 處在於，指紋觸控裝置400中每兩欄的觸控感測單元可連接至相同的預設電壓VSET線，而能節省佈置線路。換言之，可將奇數欄的觸控感測單元的結構鏡射成偶數欄的觸控感測單元的結構，如此一來，每兩欄的第一電晶體12之第一端可共用預設電壓VSET。 6 is a circuit diagram of a fingerprint touch device according to another embodiment of the present invention. Please refer to FIG. 6, the fingerprint touch device 400 is different from the fingerprint touch device 200 of the second embodiment in that the touch sensing units of every two columns in the fingerprint touch device 400 can be connected to the same preset voltage V SET line, and can save layout lines. In other words, the structure of the touch-sensing unit in the odd-numbered column can be mirrored into the structure of the touch-sensing unit in the even-numbered column, so that the first end of the first transistor 12 in every two columns can share the preset voltage V SET .

本發明的指紋觸控裝置中每一觸控感測單元包括金屬電極、第一電晶體及第二電晶體的電路結構，利用波峰所形成的感應電容釋放的電荷量會大於手指的波谷所形成的感應電容釋放的電荷量，而在第k列觸控感測單元的感測資料會在第k+1條掃描線的致能期間藉由處理電路分別透過讀取線讀取感測資料，其中k為正整數且小於m。因此，指紋觸控裝置能偵測是否發生指紋接觸事件，並根據感測資料建構成的資料畫面得到指紋圖案。此外，還可藉由增加指紋觸控裝置之觸控層的厚度，而降低耦合電容對指紋觸控裝置電路的干擾。 In the fingerprint touch device of the present invention, each touch sensing unit includes a metal electrode, a first transistor, and a circuit structure of a second transistor. The amount of charge released by the inductive capacitance formed by the wave crest is greater than that formed by the wave trough of the finger The amount of charge released by the sensing capacitor, and the sensing data of the touch sensing unit in the kth row will be read by the processing circuit through the read line during the enabling period of the k+1 scan line, Where k is a positive integer and less than m. Therefore, the fingerprint touch device can detect whether a fingerprint contact event occurs, and obtain a fingerprint pattern based on the data screen constructed from the sensing data. In addition, by increasing the thickness of the touch layer of the fingerprint touch device, the interference of the coupling capacitor on the circuit of the fingerprint touch device can be reduced.

雖然本發明已以較佳實施例揭露如上，然其並非用以限定本發明，任何熟習此技藝者，在不脫離本發明的精神和範圍內，當可作些許的更動與潤飾，因此本發明的保護範圍當視後附之申請專利範圍所界定者為準。 Although the present invention has been disclosed as above in the preferred embodiment, it is not intended to limit the present invention. Anyone who is familiar with the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be subject to the scope of the attached patent application.

100:指紋觸控裝置 100: Fingerprint touch device

10:觸控感測單元 10: Touch sensing unit

11:金屬電極 11: Metal electrode

12:第一電晶體 12: The first transistor

13:第二電晶體 13: second transistor

20:掃描驅動電路 20: Scanning drive circuit

30:處理電路 30: Processing circuit

50:觸控層 50: Touch layer

G1~Gm:掃描線 G1~Gm: scan line

R1~Rn:讀取線 R1~Rn: read line

Claims (10)

一種觸控感測單元，包括：一金屬電極；一第一電晶體，具有一第一端、一第二端及一第一控制端，該第一控制端及該第一端電性耦接一第一掃描線，而該第二端電性耦接該金屬電極；以及一第二電晶體，具有一第三端、一第四端及一第二控制端，該第二控制端電性耦接該金屬電極，該第三端電性耦接一讀取線，而該第四端電性耦接一第二掃描線。 A touch sensing unit includes: a metal electrode; a first transistor having a first end, a second end and a first control end, the first control end and the first end are electrically coupled A first scan line, and the second terminal is electrically coupled to the metal electrode; and a second transistor having a third terminal, a fourth terminal and a second control terminal, the second control terminal is electrically connected Coupled to the metal electrode, the third terminal is electrically coupled to a read line, and the fourth terminal is electrically coupled to a second scan line. 一種觸控感測單元，包括：一金屬電極；一第一電晶體，具有一第一端、一第二端及一第一控制端，該第一控制端電性耦接一第一掃描線，該第一端電性耦接一預設電壓，而該第二端電性耦接該金屬電極；以及一第二電晶體，具有一第三端、一第四端及一第二控制端，該第二控制端電性耦接該金屬電極，該第三端電性耦接一讀取線，而該第四端電性耦接一第二掃描線。 A touch sensing unit includes: a metal electrode; a first transistor having a first end, a second end and a first control end, the first control end is electrically coupled to a first scan line , The first terminal is electrically coupled to a predetermined voltage, and the second terminal is electrically coupled to the metal electrode; and a second transistor having a third terminal, a fourth terminal and a second control terminal , The second control terminal is electrically coupled to the metal electrode, the third terminal is electrically coupled to a read line, and the fourth terminal is electrically coupled to a second scan line. 一種指紋觸控裝置，包括：多條讀取線；多條掃描線；一掃描驅動電路，電性耦接該些掃描線；一處理電路，電性耦接該些讀取線；以及多個觸控感測單元，包括一第一觸控感測單元，每一觸控感測單元包括：一金屬電極； 一第一電晶體，具有一第一端、一第二端及一第一控制端，該第一控制端及該第一端電性耦接該些掃描線中之一，而該第二端電性耦接該金屬電極；以及一第二電晶體，具有一第三端、一第四端及一第二控制端，該第二控制端電性耦接該金屬電極，該第三端電性耦接該些讀取線中之一，而該第四端電性耦接該些掃描線中之一，其中對於該第一觸控感測單元，該第一控制端及該第一端電性耦接該些掃描線中之一第一掃描線，該第二電晶體的該第三端電性耦接該些讀取線之一第一讀取線而該第四端電性耦接該些掃描線中之一第二掃描線。 A fingerprint touch device includes: a plurality of read lines; a plurality of scan lines; a scan driving circuit electrically coupled to the scan lines; a processing circuit electrically coupled to the read lines; and a plurality of The touch sensing unit includes a first touch sensing unit, and each touch sensing unit includes: a metal electrode; A first transistor has a first terminal, a second terminal, and a first control terminal. The first control terminal and the first terminal are electrically coupled to one of the scan lines, and the second terminal Electrically coupled to the metal electrode; and a second transistor having a third terminal, a fourth terminal and a second control terminal, the second control terminal is electrically coupled to the metal electrode, and the third terminal is electrically connected Is electrically coupled to one of the read lines, and the fourth terminal is electrically coupled to one of the scan lines, wherein for the first touch sensing unit, the first control terminal and the first terminal Is electrically coupled to a first scan line of the scan lines, the third end of the second transistor is electrically coupled to a first read line of the read lines, and the fourth end is electrically coupled One of the scan lines is connected to the second scan line. 如申請專利範圍第3項所述的觸控裝置，其中該掃描驅動電路提供一第一掃描脈衝至該第一掃描線及提供一第二掃描脈衝至該第二掃描線，且該第一掃描脈衝的致能期間與該第二掃描脈衝的致能期間不重疊。 The touch device according to claim 3, wherein the scan driving circuit provides a first scan pulse to the first scan line and a second scan pulse to the second scan line, and the first scan The enabling period of the pulse and the enabling period of the second scan pulse do not overlap. 如申請專利範圍第4項所述的觸控裝置，其中，對於該第一觸控感測單元，於該第二掃描脈衝的致能期間，該第一掃描線不致能而該第一電晶體不導通，該第二掃描線致能而該第二電晶體導通，並該處理電路透過該第一讀取線讀取該第一觸控感測單元之一感測資料。 The touch device according to claim 4, wherein for the first touch sensing unit, during the enabling period of the second scan pulse, the first scan line is disabled and the first transistor Not conducting, the second scan line is enabled and the second transistor is conducting, and the processing circuit reads the sensing data of one of the first touch sensing units through the first read line. 一種觸控裝置，包括：多條讀取線；多條掃描線；一掃描驅動電路，電性耦接該些掃描線；一處理電路，電性耦接該些讀取線；以及 多個觸控感測單元，包括一第一觸控感測單元，每一觸控感測單元包括：一金屬電極；一第一電晶體，具有一第一端、一第二端及一第一控制端，該第一控制端電性耦接該些掃描線中之一，該第一端電性耦接一預設電壓，而該第二端電性耦接該金屬電極；以及一第二電晶體，具有一第三端、一第四端及一第二控制端，該第二控制端電性耦接該金屬電極，該第三端電性耦接該些讀取線中之一，而該第四端電性耦接該些掃描線中之一，其中對於該第一觸控感測單元，該第一控制端及該第一端電性耦接該些掃描線中之一第一掃描線，該第二電晶體的該第三端電性耦接該些讀取線之一第一讀取線而該第四端電性耦接該些掃描線中之一第二掃描線。 A touch device includes: a plurality of read lines; a plurality of scan lines; a scan driving circuit electrically coupled to the scan lines; a processing circuit electrically coupled to the read lines; and A plurality of touch sensing units, including a first touch sensing unit, each touch sensing unit includes: a metal electrode; a first transistor having a first end, a second end and a first end A control terminal, the first control terminal is electrically coupled to one of the scan lines, the first terminal is electrically coupled to a predetermined voltage, and the second terminal is electrically coupled to the metal electrode; and a second terminal Two transistors having a third terminal, a fourth terminal and a second control terminal, the second control terminal is electrically coupled to the metal electrode, and the third terminal is electrically coupled to one of the read lines , And the fourth terminal is electrically coupled to one of the scan lines, wherein for the first touch sensing unit, the first control terminal and the first terminal are electrically coupled to one of the scan lines The first scan line, the third terminal of the second transistor is electrically coupled to one of the read lines, and the fourth terminal is electrically coupled to one of the scan lines. The second scan line. 如申請專利範圍第6項所述的觸控裝置，其中該掃描驅動電路提供一第一掃描脈衝至該第一掃描線及提供一第二掃描脈衝至該第二掃描線，且該第一掃描脈衝的致能期間與該第二掃描脈衝的致能期間不重疊。 The touch device according to claim 6, wherein the scan driving circuit provides a first scan pulse to the first scan line and a second scan pulse to the second scan line, and the first scan The enabling period of the pulse and the enabling period of the second scan pulse do not overlap. 如申請專利範圍第7項所述的觸控裝置，其中，對於該第一觸控感測單元：於該第一掃描脈衝的致能期間，該第一掃描線致能而該第一電晶體導通，該第二掃描線不致能而該第二電晶體不導通；於該第二掃描脈衝的致能期間，該第一掃描線不致能而該第一電晶體不導通，該第二掃描線致能而該第二電晶體導通，並該處理電路透過該第一讀取線讀取該第一觸控感測單元之一感測資料。 The touch device according to claim 7, wherein, for the first touch sensing unit: during the enabling period of the first scan pulse, the first scan line is enabled and the first transistor Is turned on, the second scan line is not enabled and the second transistor is not turned on; during the enabling period of the second scan pulse, the first scan line is not enabled and the first transistor is not turned on, the second scan line Enabled and the second transistor is turned on, and the processing circuit reads the sensing data of one of the first touch sensing units through the first read line. 一種指紋觸控裝置，包括：一觸控層，包括：多條讀取線；多條掃描線；多個觸控感測單元，包括一第一觸控感測單元，每一觸控感測單元包括：一金屬電極；一第一電晶體，具有一第一端、一第二端及一第一控制端，該第一控制端及該第一端電性耦接該些掃描線中之一，而該第二端電性耦接該金屬電極；以及一第二電晶體，具有一第三端、一第四端及一第二控制端，該第二控制端電性耦接該金屬電極，該第三端電性耦接該些讀取線中之一，而該第四端電性耦接該些掃描線中之一，其中對於該第一觸控感測單元，該第一控制端及該第一端電性耦接該些掃描線中之一第一掃描線，該第二電晶體的該第三端電性耦接該些讀取線之一第一讀取線而該第四端電性耦接該些掃描線中之一第二掃描線；一掃描驅動電路，電性耦接該些掃描線；以及一處理電路，電性耦接該些讀取線，該處理電路透過該第一讀取線讀取該第一觸控感測單元之一感測資料。 A fingerprint touch device includes: a touch layer, including: a plurality of read lines; a plurality of scan lines; a plurality of touch sensing units, including a first touch sensing unit, each touch sensing The unit includes: a metal electrode; a first transistor having a first end, a second end and a first control end, the first control end and the first end are electrically coupled to one of the scan lines 1. The second terminal is electrically coupled to the metal electrode; and a second transistor has a third terminal, a fourth terminal and a second control terminal, and the second control terminal is electrically coupled to the metal Electrode, the third terminal is electrically coupled to one of the read lines, and the fourth terminal is electrically coupled to one of the scan lines, wherein for the first touch sensing unit, the first The control terminal and the first terminal are electrically coupled to a first scan line of the scan lines, the third terminal of the second transistor is electrically coupled to a first read line of the read lines, and The fourth terminal is electrically coupled to one of the second scan lines of the scan lines; a scan driving circuit is electrically coupled to the scan lines; and a processing circuit is electrically coupled to the read lines, the The processing circuit reads the sensing data of one of the first touch sensing units through the first read line. 如申請專利範圍第9項所述的指紋觸控裝置，更包括：多個放大電路，分別電性耦接於該些讀取線及該處理電路之間，此些放大電路中對應該第一讀取線所設置之一第一放大電路包括： 一第一輸入端，電性耦接該第一讀取線，用以接收該第一讀取線讀取之該感測資料；一第二輸入端，電性耦接一參考電位；以及一輸出端，電性耦接該處理電路。 For example, the fingerprint touch device described in claim 9 further includes a plurality of amplifying circuits electrically coupled between the read lines and the processing circuit, and the first amplifying circuits correspond to One of the first amplifying circuits provided in the reading line includes: A first input terminal electrically coupled to the first read line for receiving the sensing data read by the first read line; a second input terminal electrically coupled to a reference potential; and The output terminal is electrically coupled to the processing circuit.
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