TWI701581B - Fingerprint touch apparatus and driving method thereof - Google Patents

Abstract

A fingerprint touch apparatus includes a scanning line, a readout line, a sensing unit, a scan driving circuit and a processing circuit. The sensing unit electrically coupled to the scanning line and the readout line. The scan driving circuit electrically coupled to the scanning line, and used for providing a scan pulse for the scanning line. The processing circuit electrically coupled to the readout line. The processing circuit used for providing at least one driving pulse for the readout line during the enable period of the scan pulse, wherein each one of the enable period of the driving pulse is smaller than each one of the enable period of the scan pulse. During the enable period of the scan pulse, the processing circuit reads a sensing data through the sensing unit after each one of the enable period of the driving pulse.

Description

Fingerprint touch device and driving method thereof

The invention relates to a driving technology of a panel, in particular to a fingerprint touch device and a driving method thereof.

Touch panels can be classified into resistive touch panels and capacitive touch panels according to 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.

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.

Different from the structure of the conventional touch panel, one object of the present invention is to provide a fingerprint touch device with fingerprint recognition and touch sensing, including: scan lines, data lines, sensing units, scan driving circuits and processing Circuit. The sensing unit is electrically coupled to the scan line and the data line. The scan driving circuit is electrically coupled to the scan line, and the scan driving circuit is used to provide scan line scan pulses. The processing circuit is electrically coupled to the data line for providing at least one driving pulse for the data line during the enabling period of the scan pulse. The enabling period of each driving pulse is shorter than the enabling period of the scan pulse, and is used during the enabling period of the scan pulse During the period and after the enabling period of each driving pulse ends, the processing circuit reads the sensing data of the sensing unit.

An embodiment of the present invention provides a fingerprint touch device, including: a plurality of scan lines, a plurality of data lines, a plurality of sensing units, a scan driving circuit, and a processing circuit. Each sensing unit is electrically coupled to one of the scan lines and one of the data lines. The scan driving circuit is electrically coupled to the scan lines, and is used for providing a plurality of scan pulses to at least a part of the scan lines. The processing circuit is electrically coupled to the data lines for providing at least one driving pulse for each data line during the enabling period of each scan pulse, the enabling period of each driving pulse is shorter than the enabling period of each scan pulse, and During the enabling period of each scan pulse and after the enabling period of each driving pulse ends, the processing circuit reads the sensing data of the sensing unit.

One objective of the present invention is to provide a driving method of a fingerprint touch device. The fingerprint touch device has a sensing unit, a scan line and a data line, and the sensing unit is electrically coupled to the scan line and the data line. The driving method of the fingerprint touch device includes: providing scan pulses to the scan lines, and providing at least one driving pulse for the data line during the enabling period of the scan pulse, and the enabling period of each driving pulse is shorter than the enabling period of the scan pulse, And in the enabling period of the scan pulse and after the enabling period of each driving pulse ends, the sensing data of the sensing unit is read through the data line.

Another embodiment of the present invention provides a driving method of a fingerprint touch device. The fingerprint touch device has a sensing unit, a scan line and a data line, and the sensing unit is electrically coupled to the scan line and the data line. The driving method of the fingerprint touch device includes: providing scan pulses to the scan lines, and providing at least one driving pulse for the data line during the enabling period of the scan pulse, and the enabling period of each driving pulse is shorter than the enabling period of the scan pulse, And during the enabling period of the scan pulse and after the enabling period of each driving pulse ends, the sensing data of the sensing unit is read through the read line, wherein the read line is electrically coupled to the sensing unit.

Another embodiment of the present invention provides a driving method of a fingerprint touch device. The fingerprint touch device has a plurality of scan lines, a plurality of data lines, and a plurality of sensing units, and each sensing unit is electrically coupled to one of the scan lines and one of the data lines. The driving method of the fingerprint touch device includes: respectively providing a plurality of scan pulses to at least a part of the scan lines, and providing at least one driving pulse for each data line during the enabling period of each scan pulse, and each The enabling period of a driving pulse is shorter than the enabling period of each scan pulse, and the sensing data of the sensing unit is read during the enabling period of each scan pulse and after the enabling period of each driving pulse ends.

The fingerprint touch device of the present invention can, through the arrangement of its scan lines, data lines, and sensing units, enable the processing circuit to read the sensing data of each sensing unit to determine the fingerprint contact event and it is sufficient to construct the corresponding fingerprint based on the sensing data The fingerprint pattern of the contact event. Moreover, the scan driving circuit can also only provide scan pulses to part of the scan lines to quickly determine whether a fingerprint contact event has occurred.

Please refer to FIG. 1, which is a structural diagram of a fingerprint touch device according to an embodiment of the present invention. In the first embodiment of the present invention, the fingerprint touch device 100 includes: scan lines G1~Gm and data lines D1~ Dm, the common potential line Vcom, the scan driving circuit 10, the sensing unit 11, and the processing circuit 12. The sensing units 11 arranged in a matrix are electrically coupled to the scan lines G1 to Gm, the data lines D1 to Dm, and the common potential line Vcom, respectively. The scan driving circuit 10 is electrically coupled to the scan lines G1 to Gm, and the scan driving circuit 10 is used to provide scan pulses for the scan lines G1 to Gm. The processing circuit 12 is electrically coupled to the data lines D1 to Dm and the common potential line Vcom.

FIG. 2 is a circuit diagram of the sensing unit 11 of the first embodiment. FIG. 3 is a signal timing diagram of the sensing unit 11 in FIG. 2. 1 to 3, the sensing unit 11 includes a transistor T1 and a storage capacitor Cst. The transistor T1 has a first end, a second end and a control end. The control end is used to electrically couple the scan line, and the first One end is electrically coupled to the data line. One end of the storage capacitor Cst is electrically coupled to the second end, and the other end is electrically coupled to the common potential line Vcom.

It is particularly noted that the processing circuit 12 is used to provide at least one driving pulse for the data line during the enabling period of the scan pulse, and the enabling period of each driving pulse is shorter than the enabling period of the scan pulse. In addition, during the enabling period of the scan pulses of the scan lines G1~Gm, and after the enabling period of each driving pulse ends, the processing circuit 12 reads the sensing data of the sensing unit 11, whereby the processing circuit 12 is based on The read sensing data detects whether a fingerprint contact event occurs in the fingerprint touch device 100, and obtains a fingerprint pattern based on the data frame constructed by the sensing data.

For example, as shown in FIG. 3A, the processing circuit 12 is used to provide the data line Dm driving pulse P11 to charge the storage capacitor Cst during the enabling period of the scan pulse P10 of the scan line Gm, and the data line Dm is in the driving pulse P11 After the end, it is at a low level, so the storage capacitor Cst will be discharged during the period t11, and then read through the data line Dm and sent to the processing circuit 12, so the processing circuit 12 reads the sensing unit 11 and obtains the sensing data.

In some embodiments, the common potential line Vcom can be coupled to a zero potential or a ground potential. Here, if the sensing unit 11 is not touched, the detected sensing data is the discharge of the storage capacitor Cst during the period t11. Potential. Conversely, if the sensing unit 11 is touched by a finger, the contact position is grounded via the human body in response to an inductive capacitor, so that the sensing data read by the processing circuit 12 will be greater than the provided driving pulse P11, and it is determined that a fingerprint has occurred Contact incident.

In some embodiments, the common potential line Vcom can be coupled to a non-zero potential. Preferably, the common potential line Vcom and its corresponding data line can be provided with a driving pulse with the same enabling time and voltage magnitude. Here, if If the sensing unit 11 is not touched, the sensing data is detected when the two ends of the storage capacitor Cst are equipotential in the period t11, wherein the two ends of the storage capacitor Cst are almost equal to zero current. Conversely, if the sensing unit 11 is touched by a finger, the contact position is grounded via the human body and responds to an inductive capacitor, so that the sensed data of the detected sensing unit 11 will be a potential that is obviously not equal to zero, so it is determined that a fingerprint has occurred Contact incident.

Furthermore, during the enabling period of the scan pulses of the scan lines G1˜Gm, the processing circuit 12 may provide one or more driving pulses for the data lines D1˜Dm. As shown in FIG. 3B, in the enabling period of the scan pulse P10 of the scan line Gm, after the driving pulse P12 is provided to the data line Dm, the data line Dm reads the sensing data of the sensing unit 11 in the period t12, and The processing circuit 12 can also perform another detection to provide the driving pulse P13 to the data line Dm, and the data line Dm reads the sensing data of the sensing unit 11 in the period t13. The processing circuit 12 can increase accuracy by detecting multiple times through the data line Dm during the enabling period of the scan pulse of the scan line Gm, and has richer sensing data to construct a data screen to obtain a fingerprint pattern. However, the present invention is not limited to this, and the number of detections through the data line during the enable period of the scan pulse can be adjusted according to the actual implementation situation.

To further illustrate, FIG. 4 is a schematic diagram when a fingerprint contact event occurs in the sensing unit 11 of the present invention. 1 and 4, when the sensing unit 11 in the fingerprint touch device 100 is touched by a finger, the finger applied to the glass cover plate corresponding to the sensing unit 11 and the surface of the glass cover plate will be A sensing capacitor Cf is formed, and the corresponding sensing unit 11 responds to the sensing capacitor Cf, and one end of the sensing capacitor Cf is like being coupled to the second end of the sensing unit 11, and the other end is grounded. Finger-based fingerprint lines have peaks and troughs, and the charge value charged by the sensing capacitor Cf responding to the peak of the fingerprint will be greater than the charge value charged by the sensing capacitor Cf responding to the trough of the fingerprint. Therefore, after the processing circuit 12 reads the sensing data of the sensing unit 11 corresponding to each fingerprint contact event, one or more fingerprint patterns can be constructed according to different charge values. In the embodiment of the present invention, since the fingerprint touch device 100 has a resolution of at least 200 dpi to 508 dpi, preferably a resolution of 508 dpi, there is sufficient sensing data to facilitate the construction of a data screen.

In the aforementioned first embodiment, after the data line provides the driving pulse to each sensing unit, the sensing data of each sensing unit is read by the same data line and sent to the processing circuit. FIG. 5A is a structural diagram of a fingerprint touch device 200 according to the second embodiment of the present invention. FIG. 5B is a circuit diagram of the sensing unit 11a according to the second embodiment of the invention. It should be noted that the difference between the sensing unit 11a of the second embodiment and the sensing unit of the first embodiment is that after the data line provides driving pulses to each sensing unit 11a, it is read by the same sensing unit 11a. Take the line to read the sensing data of each sensing unit 11a and send it to the processing circuit.

As shown in FIG. 5A, the sensing units 11a arranged in a matrix are electrically coupled to the scan lines G1~Gm, the data lines D1~Dm and the read lines R11~Rmm, respectively. As shown in FIG. 5B, the sensing unit 11a includes a transistor T1, a transistor T2, and a storage capacitor Cst. The transistor T1 has a first terminal, a second terminal, and a first control terminal. The first control terminal is used for electrical coupling. The scan line Gm is connected, and the first terminal is electrically coupled to the data line Dm. One end of the storage capacitor Cst is electrically coupled to the second end. The transistor T2 has a third terminal, a fourth terminal and a second control terminal. The second control terminal is electrically coupled to the scan line Gm, the third terminal is electrically coupled to the other end of the storage capacitor Cst, and the fourth terminal is electrically coupled to The read line Rmm is electrically coupled to the processing circuit 12 to transmit sensing data.

FIG. 5C is a signal timing diagram of the sensing unit 11a of FIG. 5B. 5A and 5C, the processing circuit 12 is used to provide the data line Dm driving pulse P14 to charge the storage capacitor Cst during the enabling period of the scan pulse P10 of the scan line Gm, and the data line Dm ends at the driving pulse P14 The latter is a low level, so the storage capacitor Cst is discharged and is read by the read line Rmm in the period t14 and then sent to the processing circuit 12, whereby the processing circuit 12 reads the sensing unit 11a to obtain sensing data.

FIG. 6 is a circuit diagram of the sensing unit 11b according to the third embodiment of the present invention. The sensing unit 11b includes a transistor T1 and a metal sheet 13. The method of driving and reading the sensing data of the sensing unit 11b is substantially the same as that of the sensing unit of the first embodiment, except that the second end of the transistor T1 is electrically coupled to the metal sheet 13. Specifically, referring to FIG. 6 and FIG. 3A together, the processing circuit is used to provide the data line Dm driving pulse P11 during the enable period of the scan pulse P10 of the scan line Gm. At this time, if the fingerprint contact event has not yet occurred, it will not There is a sensing capacitor Cf, and the metal sheet 13 is in a floating state. Therefore, the sensing data sent to the processing circuit by the data line Dm after reading may have some floating values. However, the charge value charged by the sensing capacitor Cf in response to the crest of the fingerprint will be significantly greater than the charge value charged in the sensing capacitor Cf in response to the trough of the fingerprint, so that when a fingerprint contact event occurs, there are many corresponding fingerprint contact events. The changes in the sensing data between two adjacent sensing units will show a significant difference. Therefore, after the processing circuit reads the sensing data of the sensing unit 11b, it determines whether the change of the sensing data between a plurality of adjacent sensing units 11b is greater than a preset threshold value, and if yes, it is determined to occur Fingerprint contact incident. In this way, the part where the change of the sensing data between the plurality of adjacent sensing units 11b is greater than the preset threshold value will construct the pattern of the wave crest pattern of the fingerprint.

In the first embodiment to the third embodiment, the fingerprint touch device detects whether a fingerprint contact event occurs by sequentially providing a plurality of scan pulses to each scan line G1~Gm, and each scan pulse At least one driving pulse is provided for each data line D1~Dm during the enabling period, and the processing circuit 12 judges whether a fingerprint contact event has occurred by reading the sensing data of the sensing unit. Alternatively, the scan driving circuit 10 divides the scan lines G1~Gm into a plurality of groups, and provides a plurality of scan pulses to the groups respectively, that is, the scan driving circuit 10 may only provide a part of the scan lines Scan the pulse, and quickly determine whether a fingerprint contact event has occurred. Wherein, the manner of dividing the scan lines G1~Gm into multiple groups can be adjusted according to actual implementation needs. Furthermore, when a fingerprint contact event is detected, the scan can be expanded according to the corresponding range, so that the processing circuit 12 reads the sensing data of the sensing unit corresponding to the fingerprint contact event to construct a fingerprint pattern, for example, In other words, after detecting a fingerprint contact event, scan the corresponding scan line with multiple adjacent scan lines, so that the neighboring sensor can be sensed according to the sensor unit where the fingerprint contact event occurred. Unit to expand the range of sensing data.

FIG. 7 is a schematic diagram of the configuration of the switch unit of the fingerprint touch device according to an embodiment of the present invention. The fingerprint touch device 300 further includes a switch unit 21 or/and 22. By combining the application of the switch unit 21/22, Reduce the number of scan drive circuits connected to multiple scan lines, and reduce the number of signal input lines that the circuit control chip is connected to multiple data lines. This embodiment is based on the fingerprint touch device 300 with the sensing unit of the first embodiment, but the present invention is not limited. Those skilled in the art should know the structure of the sensing unit of the second embodiment. The switch unit can also be used in combination with the fingerprint touch device having the sensing unit of the second embodiment or the third embodiment. In addition, since the driving method of the fingerprint touch device 300, the operations of detecting fingerprint contact events and constructing a fingerprint pattern are the same as those of the fingerprint touch device of the first embodiment to the third embodiment, the details are not described herein again.

Referring to FIG. 7, the switch unit 21 may specifically be a plurality of one-to-many switch circuits. The input terminal is used to receive the scan pulse provided by the scan driving circuit 10, and the output terminal is electrically coupled to the scan lines G1~Gm to form n There are input terminals and m output terminals, and it can be known that both n and m are positive integers and n is less than m.

In some embodiments, the switch circuit is controlled to be turned on with the scan pulse sent by the scan drive circuit 10. For example, the switch circuit provides one scan pulse to one hundred scan lines, and the one hundred scan lines In actual implementation, it is just about the range of driving scan lines required to obtain a fingerprint pattern. Based on the foregoing, when the scan driving circuit 10 only provides part of the scan pulse to the switch circuit, for example, only the even shift register provides the scan pulse, it can quickly determine whether a fingerprint contact event occurs. In some embodiments, when it is determined that a fingerprint contact event occurs, the processing circuit 12 can control the conduction of the switch circuit according to a logical design. For example, the switch circuit can sequentially transmit scan pulses to scan lines and read each corresponding fingerprint contact. The sensing data of the sensing unit of the event constructs a fingerprint pattern.

In some embodiments, the switch unit 21 may also be a plurality of demultiplexers or a multi-stage demultiplexer, by electrically coupling the plurality of demultiplexers to the scan driving circuit 10 and the scan lines G1~Gm. In between, each multiplexer has n input terminals and m output terminals, and the input terminal of the demultiplexer is used to receive the scan pulse provided by the scan driving circuit 10, and the output terminal of the demultiplexer is electrical The scan lines G1~Gm are sexually coupled. In some embodiments, by electrically coupling a plurality of demultiplexers between the processing circuit 12 and the data lines D1~Dm, the demultiplexer has n input terminals and m output terminals, and the demultiplexer The input terminal of the device is used to receive the driving pulse provided by the processing circuit 12, and the output terminal of the multiplexer 22 is electrically coupled to the data lines D1~Dm. Those skilled in the art should know that if the switch unit is implemented with a multi-stage demultiplexer, the input signal of the switch unit will be less than when implemented with a single-stage demultiplexer. In addition, those skilled in the art should also be aware of various aspects of demultiplexers, such as one-to-four demultiplexers or three-to-eight demultiplexers..., which will not be described here. When the switch unit is realized by a demultiplexer, if the demultiplexer is in the enabled state, it will be caused by any input terminal of the demultiplexer receiving a scan pulse provided by the scan driving circuit 10 The multiple output terminals of the demultiplexer are passed to the scan line. In some embodiments, the processing circuit 12 can control each selection line of the demultiplexer according to a logic design, so that the scan pulses are sequentially transmitted to the scan lines.

Referring to FIGS. 7 and 8A together, in one embodiment, during the enabling period of the scan pulse of the scan line G1, the processing circuit 12 sequentially transmits driving pulses to the data lines D1~Dm through the switch unit 22, and After the enabling period of the driving pulse of each data line D1 to Dm ends, the processing circuit 12 reads the sensing data of the sensing unit 11 through the same data line. Thereby, the processing circuit 12 can sequentially receive the sensing data, detect whether a fingerprint contact event occurs, and obtain the fingerprint pattern according to the constructed data screen.

Please refer to FIGS. 7 and 8B together. In one embodiment, the data lines are divided into multiple groups, and each of the groups can be sequentially performed during the enable period of the scan pulse of each scan line. Transmit drive pulses. In detail, during the enable period of the scan pulse of the scan line G1, the processing circuit 12 simultaneously transmits the driving pulse to the data lines D1~D(m/n) through the switch unit 22, and the data lines D1~D(m/n) After the enabling period of the driving pulse of n) ends, the data lines D1 to D (m/n) simultaneously read the sensing data of the sensing unit 11. Then, the switch unit 22 simultaneously transmits the driving pulses to the data lines D(m/n+1)~D(m*2/n), and the data lines D(m/n+1)~D(m*2/ After the enabling period of the driving pulse of n) ends, the data lines D(m/n+1)˜D(m*2/n) simultaneously read the sensing data of the sensing unit 11. Therefore, in the same way, it can be known that during the enabling period of the scan pulse of each scan line, multiple groups sequentially send drive pulses to the data lines, and the sensing units of the sensing unit are read by multiple groups. Test data, so the operation process of the subsequent group will not be repeated here.

In addition, the switch unit 22 may be realized via a plurality of one-to-many switching circuits, or via a plurality of demultiplexers (single-stage or multi-stage). Furthermore, although the foregoing description is based on the scan line G1, those skilled in the art should know after referring to the foregoing embodiments that the switch unit 21 arranges the scan pulses to be transmitted to the scan line, and the switch unit 22 controls the data line The way of reading the sensing data, therefore, the fingerprint touch device of the present invention can reach the scan line of the driving part and control the data line of the part to read the sensing data through the configuration of the switch unit 21 and the switch unit 22.

9 is a schematic diagram of the configuration of the switch unit of the fingerprint touch device according to another embodiment of the present invention. Please refer to FIG. 9. The fingerprint touch device 400 further includes a switch unit 23 or/and 22. The switch unit 23 is located in the processing circuit 12 and Between scan driving circuit 10. The switch unit 23 has a similar operating principle to the switch unit 21 described in FIG. 8. In FIG. 9, the processing circuit 12 sends a control signal, such as a high-level signal, to the scan by controlling the conduction of the switch circuit 23. In the driving circuit 10, each level of shift register in the scan driving circuit 10 outputs scan pulses as the start signal terminal receives the high level signal of each switch circuit 23. Therefore, the processing circuit 12 can control the output of the switch circuit 23 according to a logic design, so that the scan driving circuit 10 only provides scan pulses for part of the scan lines, and quickly determines whether a fingerprint contact event occurs. Furthermore, the switch circuit can sequentially transmit the scan pulses to the scan lines. Alternatively, the configuration of the switch unit 23 and the switch unit 22 can reach the scan line of the driving part and control the data line of the part to read the sensing data.

In some embodiments, a switch unit 21 (as shown in FIG. 7) may be provided between the scan driving circuit 10 and the scan lines G1~Gm at the same time, and a switch unit 23 may be provided between the processing circuit 12 and the scan driving circuit 10 ( As shown in Figure 9). Specifically, it is assumed that there are 2,000 scan lines in the fingerprint touch device, and the scan lines are divided into twenty groups, that is, each output of the scan driving circuit 10 can be coupled through the switch unit 21 Up to one hundred scan lines, and the processing circuit 12 can output twenty control signals to the scan driving circuit 10 through the switch unit 23. Thereby, the processing circuit 12 can control the switch unit 21 to sequentially transmit the scan pulses to the scan lines according to the logic design, or only control the control signal of the switch unit 23 to be a high-level signal and the switch unit 21 follows the scan The scan pulse sent by the driving circuit 10 controls the conduction of the switch circuit to provide scan pulses to only part of the scan lines to quickly determine whether a fingerprint contact event has occurred, or after a fingerprint contact event is detected, it can also be based on the relative The corresponding range is expanded to scan, and the configuration of the switch unit 21, the switch unit 22, and the switch unit 23 can reach the scan line of the driving part and control the data line to read the sensing data.

The fingerprint touch device of the present invention can, through the arrangement of its scan lines, data lines, and sensing units, enable the processing circuit to read the sensing data of each sensing unit to determine the fingerprint contact event and it is sufficient to construct the corresponding fingerprint based on the sensing data The fingerprint pattern of the contact event. Moreover, the scan driving circuit can also only provide scan pulses to part of the scan lines to quickly determine whether a fingerprint contact event has occurred.

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, 200, 300, 400‧‧‧Fingerprint touch device 10‧‧‧Scan driving circuit 11, 11a, 11b‧‧‧Sensing unit 12‧‧‧Processing circuit 13‧‧‧Metal sheet 21, 22, 23‧ ‧‧Switch unit T1, T2‧‧‧Transistor Cst‧‧‧Storage capacitor Cf‧‧‧Sense capacitor G1~Gm‧‧‧Scan line D1~Dm‧‧‧Data line D1~D(m/n), D (m/n +1)~D(m*2/n), D(m*(n-1)/n +1)~Dm‧‧‧Data line R11~Rmm‧‧‧Reading line Vcom‧‧ ‧Common potential lines P10, P11, P12, P13, P14‧‧‧Pulse t11, t12, t13, t14‧‧‧Period

FIG. 1 is a structural diagram of a fingerprint touch device according to the first embodiment of the present invention. 2 is a circuit diagram of the sensing unit of the first embodiment of the invention. FIG. 3A is a signal timing diagram of a sensing unit according to an embodiment of the invention. FIG. 3B is a signal timing diagram of a sensing unit according to still another embodiment of the invention. 4 is a schematic diagram when a fingerprint contact event occurs in the sensing unit of the present invention. 5A is a structural diagram of a fingerprint touch device according to a second embodiment of the invention. 5B is a circuit diagram of the sensing unit of the second embodiment of the invention. FIG. 5C is a signal timing diagram of the sensing unit of FIG. 5B. FIG. 6 is a circuit diagram of a sensing unit according to a third embodiment of the invention. FIG. 7 is a schematic diagram of the configuration of the switch unit of the fingerprint touch device according to an embodiment of the invention. FIG. 8A is a timing diagram of driving signals of the fingerprint touch device according to an embodiment. FIG. 8B is a timing diagram of driving signals of the fingerprint touch device according to another embodiment. 9 is a schematic diagram of the configuration of the switch unit of the fingerprint touch device according to another embodiment of the present invention.

100‧‧‧Fingerprint touch device

10‧‧‧Scan drive circuit

11‧‧‧Sensing unit

12‧‧‧Processing circuit

G1~Gm‧‧‧Scan line

D1~Dm‧‧‧Data line

Vcom‧‧‧Common potential line

Claims (16)

A fingerprint touch device includes: a scan line; a data line; a sensing unit electrically coupled to the scan line and the data line; a scan driving circuit electrically coupled to the scan line to provide the A scan line, a scan pulse; and a processing circuit, electrically coupled to the data line, for providing at least one driving pulse for the data line during the enabling period of the scan pulse, and the enabling period of each driving pulse is shorter than the scan During the enabling period of the pulse, and during the enabling period of the scan pulse and after the enabling period of each driving pulse ends, the processing circuit reads a sensing data of the sensing unit through the data line. The fingerprint touch device according to claim 1, wherein the sensing unit includes: a transistor having a first end, a second end and a control end, and the control end is electrically coupled to the scan The first end is electrically coupled to the data line; and a storage capacitor, one end of which is electrically coupled to the second end, and the other end is electrically coupled to a common potential. The fingerprint touch device according to claim 1, wherein the sensing unit includes: a transistor having a first end, a second end and a control end, and the control end is electrically coupled to the scan Wire, and the first end is electrically coupled to the data line; and a metal sheet is electrically coupled to the second end. A fingerprint touch device includes: a scan line; a data line; a sensing unit electrically coupled to the scan line and the data line; a scan driving circuit electrically coupled to the scan line to provide the A scan line, a scan pulse; and a processing circuit, electrically coupled to the data line, for providing at least one driving pulse for the data line during the enabling period of the scan pulse, and the enabling period of each driving pulse is shorter than the scan During the enabling period of the pulse, during the enabling period of the scan pulse and after the enabling period of each driving pulse ends, the processing circuit reads a sensing data of the sensing unit; wherein, the sensing unit includes : A first transistor having a first terminal, a second terminal and a first control terminal, the first control terminal is electrically coupled to the scan line, and the first terminal is electrically coupled to the data line; A storage capacitor, one end of which is electrically coupled to the second end; and a second transistor having a third end, a fourth end and a second control end, the second control end is electrically coupled to the scan line The third terminal is electrically coupled to the other terminal of the storage capacitor, the fourth terminal is electrically coupled to a read line, and the read line is electrically coupled to the processing circuit to transmit the sensing data. A fingerprint touch device includes: a plurality of scan lines; a plurality of data lines; a plurality of sensing units, each sensing unit is electrically coupled to one of the scan lines and one of the data lines ； A scan driving circuit electrically coupled to the scan lines and used to provide scan pulses to at least a part of the scan lines respectively; and a processing circuit electrically coupled to the data lines, It is used to provide at least one driving pulse for each data line during the enabling period of each scan pulse. The enabling period of each driving pulse is shorter than the enabling period of each scan pulse, and during the enabling period of each scan pulse And after the enabling period of each driving pulse ends, the processing circuit reads the sensing data of the sensing units through the data lines. According to the fingerprint touch device described in claim 5, each sensing unit includes: a transistor having a first end, a second end and a control end, and the control end is electrically coupled to the One of the scan lines, the first end is electrically coupled to one of the data lines; and a storage capacitor, one end of which is electrically coupled to the second end, and the other end is electrically coupled to a common Potential; wherein, in the enabling period of each scan pulse and after the end of the enabling period of each driving pulse, the processing circuit reads the sensing data through each data line. The fingerprint touch device according to claim 5, wherein the sensing unit includes: a transistor having a first end, a second end and a control end, and the control end is electrically coupled to the scan Wire, and the first end is electrically coupled to the data line; and a metal sheet is electrically coupled to the second end. The fingerprint touch device according to claim 5, further comprising at least one switch unit, the at least one switch unit is electrically coupled between the scan driving circuit and the scan lines, the at least one switch unit It has n input terminals and m output terminals, n and m are both positive integers and n is less than m, and any input terminal of the at least one switch unit is used to receive one of the scan pulses, and the at least one Any output terminal of the switch unit is electrically coupled to one of the scan lines. According to the fingerprint touch device described in claim 5, it further includes at least one switch unit, the at least one switch unit is electrically coupled between the processing circuit and the data lines, and the at least one switch unit has n input terminals and m output terminals, n and m are both positive integers and n is less than m, and any input terminal of the at least one switch unit is used to receive one of the driving pulses, and the at least one switch Any output terminal of the unit is electrically coupled to one of the data lines. According to the fingerprint touch device described in claim 5, it further includes at least one switch unit, the at least one switch unit is electrically coupled between the scan driving circuit and the processing circuit, and the at least one switch unit has At least one input terminal and n output terminals, n is a positive integer and n is greater than 1, and any input terminal of the at least one switch unit is used to receive a control signal of the processing circuit, and any one of the at least one switch unit The output terminal is electrically coupled to the scan driving circuit. For the fingerprint touch device described in claim 5, the scan driving circuit further divides the scan lines into a plurality of groups, and provides a plurality of scan pulses to the groups respectively. A fingerprint touch device includes: a plurality of scan lines; a plurality of data lines; a plurality of sensing units, each sensing unit is electrically coupled to one of the scan lines and one of the data lines ; A scan driving circuit electrically coupled to the scan lines, and used to provide a plurality of scan pulses to at least some of the scan lines; and a processing circuit electrically coupled to the data lines , Used to provide at least one driving pulse for each data line during the enabling period of each scan pulse, the enabling period of each driving pulse is less than the enabling period of each scan pulse, and during the enabling period of each scan pulse During the period and after the enabling period of each driving pulse ends, the processing circuit reads a plurality of sensing data of the sensing units; wherein, each sensing unit includes: a first transistor having a first transistor Terminal, a second terminal and a first control terminal, the first control terminal is electrically coupled to one of the scan lines, and the first terminal is electrically coupled to one of the data lines; a storage A capacitor, one end of which is electrically coupled to the second end; and a second transistor, having a third end, a fourth end and a second control end, the second control end is electrically coupled to the first control The third end is electrically coupled to the other end of the storage capacitor, the fourth end is electrically coupled to a read line, and the read line is electrically coupled to the processing circuit to transmit the sensing data. A method for driving a fingerprint touch device. The fingerprint touch device has a sensing unit, a scan line and a data line, and the sensing unit is electrically coupled to the scan line and the data line. The driving method includes: Providing a scan pulse to the scan line; At least one driving pulse is provided for the data line during the enabling period of the scan pulse, and the enabling period of each driving pulse is less than the enabling period of the scan pulse; and during the enabling period of the scan pulse and each After the enabling period of the driving pulse ends, the sensing data of one of the sensing units is read through the data line. A method for driving a fingerprint touch device. The fingerprint touch device has a sensing unit, a scan line and a data line, and the sensing unit is electrically coupled to the scan line and the data line. The driving method includes: Providing a scan pulse to the scan line; providing at least one driving pulse for the data line during the enabling period of the scan pulse, and the enabling period of each driving pulse is shorter than the enabling period of the scan pulse; and during the scanning During the enabling period of the pulse and after the enabling period of each driving pulse ends, read one of the sensing data of the sensing unit through a read line, wherein the read line is electrically coupled to the sensing unit; Wherein, the sensing unit includes: a first transistor having a first end, a second end, and a first control end, the first control end is electrically coupled to the scan line, and the first end is electrically Coupled to the data line; a storage capacitor, one end of which is electrically coupled to the second end; and a second transistor having a third end, a fourth end and a second control end, the second control end The third end is electrically coupled to the scan line, the third end is electrically coupled to the other end of the storage capacitor, the fourth end is electrically coupled to a read line, and the read line is electrically coupled to the processing circuit to transmit the Sensing data. A method for driving a fingerprint touch device. The fingerprint touch device includes a plurality of scan lines, a plurality of data lines, and a plurality of sensing units. Each sensing unit is electrically coupled to one of the scan lines and the One of the data lines, the driving method includes: respectively providing a plurality of scan pulses to at least a part of the scan lines; providing at least one scan line for each data line during the enabling period of each scan pulse Driving pulses, and the enabling period of each driving pulse is shorter than the enabling period of each scanning pulse; and in the enabling period of each scanning pulse and after the enabling period of each driving pulse is over, through the data lines Read multiple sensing data of the sensing units. For example, the driving method described in claim 15 further includes dividing the scan lines into a plurality of groups, and respectively providing a plurality of scan pulses to the groups.

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