TWI812432B - Fingerprint identification device and operating method thereof - Google Patents

Abstract

A fingerprint identification device and an operating method thereof are provided. The fingerprint identification device includes a plurality of fingerprint scanning blocks, at least one light emitting diode and a control unit. Each of the fingerprint scanning blocks includes a first scanner and a plurality of second scanners. The first scanner is located in a center of the fingerprint scanning block. The second scanners surround the first scanner. The light emitting diodes are located among the fingerprint scanning blocks. The control unit activates the first scanners to sense a finger. The control unit activates some of the fingerprint scanning blocks according to a sensing result of the first scanners to scan a fingerprint on the finger.

Description

Fingerprint identification device and its operating method

The present disclosure relates to an electronic device and an operating method thereof, and in particular, to a fingerprint identification device and an operating method thereof.

Many electronic products use fingerprint recognition devices to enhance information security. However, the area of current fingerprint recognition devices is usually smaller than that of a finger. During the fingerprint registration process, the application must capture fingerprints multiple times and stitch them together. The stitched final fingerprint may just pass the threshold of required feature points, and the fingerprint template may still be fragmented. The registration process cannot identify whether it is the same finger, so a fingerprint template may be a combination of multiple different fingers. During the fingerprint registration process, due to the small area of the fingerprint recognition device, it can usually only capture limited feature points. Under such conditions, there is only the most basic security level.

The present disclosure relates to a fingerprint identification device and its operating method. After increasing the size of the fingerprint identification device, only the first scanner is turned on in the standby state, and the second scanner and the light-emitting diode are not turned on, so that Electricity losses can be reduced to the lowest. In addition, even when a finger is sensed, only a part of the second scanner is turned on, so that power consumption can be effectively reduced.

According to one aspect of the present disclosure, a fingerprint identification device is provided. The fingerprint identification device includes several fingerprint scanning blocks, at least one light-emitting diode and a control unit. Each fingerprint scanning block includes a first scanner and a plurality of second scanners. The first scanner is located in the center of the fingerprint scanning block. These second scanners surround the first scanners. Light-emitting diodes are located between these fingerprint scanning blocks. The control unit activates these first scanners to sense a finger. The control unit activates part of the fingerprint scanning block to scan a fingerprint based on one of the sensing results of the first scanners.

According to another aspect of the present disclosure, an operating method of a fingerprint identification device is provided. The fingerprint identification device includes several fingerprint scanning areas, at least one light-emitting diode and a control unit. Each fingerprint scanning block includes a first scanner and a plurality of second scanners. In each fingerprint scanning block, the first scanner is located in the center of each fingerprint scanning block. These second scanners surround the first scanners. The operation method includes the following steps. The control unit activates these first scanners. If some of the first scanners sense a finger, the control unit activates some of the fingerprint scanning blocks to scan a fingerprint on the finger based on one of the sensing results of the first scanners.

In order to have a better understanding of the above and other aspects of the present disclosure, embodiments are given below and described in detail with reference to the accompanying drawings:

100,200,300,400,500,600,700,800,900: Fingerprint identification device

BK1, BK2, BK3, BK4, BK5, BK6, BK7, BK8, BK91, BK92: fingerprint scanning block

CD1: first condition

CD2: Second condition

CR1: coordinate point

CTR1: control unit

LED1,LED2,LED3,LED4,LED5,LED6,LED7,LED8,LED9: light emitting diodes

RX1: Horizontal scanning range

RY1: Longitudinal scanning range

S110, S120, S130: steps

SN1: First scanner

SN2: Second scanner

ST1: standby state

ST2: Startup state

Figure 1 is a schematic diagram of a fingerprint identification device according to an embodiment.

Figure 2 is a schematic diagram of a fingerprint identification device according to an embodiment.

Figure 3 illustrates a state machine diagram of a fingerprint identification device according to an embodiment.

FIG. 4 illustrates a flow chart of an operating method of a fingerprint identification device according to an embodiment.

Figure 5 illustrates scan lines according to one embodiment.

Figure 6 is a schematic diagram of a fingerprint identification device according to another embodiment.

Figure 7 is a schematic diagram of a fingerprint identification device according to another embodiment.

Figure 8 is a schematic diagram of a fingerprint identification device according to another embodiment.

Figure 9 is a schematic diagram of a fingerprint identification device according to another embodiment.

Figure 10 is a schematic diagram of a fingerprint identification device according to another embodiment.

Figure 11 is a schematic diagram of a fingerprint identification device according to another embodiment.

Figure 12 is a schematic diagram of a fingerprint identification device according to another embodiment.

Figure 13 is a schematic diagram of a fingerprint identification device according to another embodiment.

Please refer to FIG. 1 , which illustrates a schematic diagram of a fingerprint identification device 100 according to an embodiment. The fingerprint identification device 100 is, for example, installed on a laptop, a mobile phone, a tablet, or an electronic lock. The area of the fingerprint identification device 100 of this embodiment is larger than the area of a finger, so that the user only needs to press once to complete the fingerprint registration.

Please refer to FIG. 2 , which illustrates a schematic diagram of a fingerprint identification device 100 according to an embodiment. The fingerprint identification device 100 includes several fingerprint scanning blocks BK1, at least one light-emitting Diode LED1 and a control unit CTR1. In the embodiment of FIG. 2, the number of fingerprint scanning blocks BK1 is 4, and the number of light-emitting diodes LED1 is 1. Each fingerprint scanning block BK1 is octagonal, and the light emitting diode LED1 is located between four adjacent fingerprint scanning blocks BK1. The overall area of all fingerprint scanning blocks BK1 is, for example, greater than 1 square centimeter, allowing the entire finger to be contacted.

The fingerprint scanning block BK1 includes a first scanner SN1 and several second scanners SN2. The first scanner SN1 is located in the center of the fingerprint scanning block BK1. The second scanner SN2 surrounds the first scanner SN1. The first scanner SN1 and the second scanner SN2 are arranged in a matrix, for example. For example, the first scanner SN1 and the second scanner SN2 use the same scanner. Alternatively, the first scanner SN1 and the second scanner SN2 may be different scanners. The control unit CTR1 is used to control the first scanner SN1, the second scanner SN2 and the light-emitting diode LED1, and is, for example, a chip, a circuit, a circuit board, a computer program, or a storage device that stores program codes.

The first scanner SN1 can be used to sense fingers. When a finger is sensed, the corresponding second scanner SN2 is activated to perform finger scanning. In this way, energy consumption can be significantly saved.

Please refer to FIG. 3 , which illustrates a state machine diagram of the fingerprint identification device 100 according to an embodiment. The fingerprint identification device 100 has a standby state ST1 and a start-up state ST2. In the standby state ST1, only the first scanner SN1 is activated. In the start-up state ST2, the second scanner SN2 is started. When the fingerprint identification device 100 is in the standby state ST1 and the first condition CD1 is satisfied, it will transition to the startup state ST2. The first condition CD1 is, for example, sensing a finger, receiving Fingerprint registration instructions, receiving electronic device power-on instructions, buttons being pressed, etc. When the fingerprint identification device 100 is in the startup state ST2, it will transition to the standby state ST1 when the second condition CD2 is satisfied. The second condition CD2 is, for example, capturing fingerprints, continuing for a predetermined time, completing registration, etc.

Please refer to FIG. 4 , which illustrates a flow chart of an operating method of the fingerprint identification device 100 according to an embodiment. In step S110, the control unit CTR1 activates the first scanner SN1. The control unit CTR1 senses the finger at a first frequency, for example.

Next, in step S120, the control unit CTR1 determines whether the first scanner SN1 senses the finger. If the first scanner SN1 senses the finger, the process proceeds to step S130; if the first scanner SN1 does not sense the finger, the process returns to step S110.

In step S130, the control unit CTR1 activates part of the fingerprint scanning block BK1 and the light-emitting diode LED1 according to the sensing result of the first scanner SN1 to scan a fingerprint on the finger. In this step, the control unit CTR1 scans fingerprints at a second frequency, for example. The first frequency is lower than the second frequency.

In step S130, the control unit CTR1 only activates the fingerprint scanning block BK1 that has the finger scanned, but does not activate all the fingerprint scanning blocks BK1.

For example, please refer to FIG. 5 , which illustrates scan lines according to an embodiment. The control unit CTR1 can obtain the coordinate point CR1 of the first scanner SN1 that senses the finger according to the sensing result, and obtain a horizontal scanning range RX1 and a longitudinal scanning range RY1 based on the coordinate point CR1. The center system of the horizontal scanning range RX1 is the coordinate The X coordinate of point CR1; the center of the longitudinal scanning range RY1 is the Y coordinate of point CR1. The horizontal scanning range RX1 and the vertical scanning range RY1 can define the fingerprint scanning block BK1 that does not scan the finger.

Please refer to FIG. 6 , which illustrates a schematic diagram of a fingerprint identification device 200 according to another embodiment. In the embodiment of FIG. 6 , four octagonal fingerprint scanning blocks BK2 are arranged in a cross shape, with one light-emitting diode LED2 disposed at the center and four light-emitting diodes LED2 disposed at the four corners. More light-emitting diodes LED2 can make the light source more uniform.

Please refer to FIG. 7 , which illustrates a schematic diagram of a fingerprint identification device 300 according to another embodiment. In the embodiment of FIG. 7, each fingerprint scanning block BK3 is circular. The light-emitting diode LED3 is located between three adjacent fingerprint scanning blocks BK3. The fingerprint scanning blocks BK3 may not be arranged in a matrix, but may be arranged in a triangle. The fingerprint scanning blocks BK3 arranged in a triangle can be closer together to increase the scanning density.

Please refer to FIG. 8 , which illustrates a schematic diagram of a fingerprint identification device 400 according to another embodiment. In the embodiment of FIG. 8, each fingerprint scanning block BK4 is circular. The light emitting diode LED4 is located between four adjacent fingerprint scanning blocks BK4.

When multiple sets of fingerprint scanning blocks and multiple sets of light-emitting diodes are used, the fingerprint scanning blocks and the light-emitting diodes can be randomly arranged in various shapes. For example, please refer to FIG. 9 , which illustrates a schematic diagram of a fingerprint identification device 500 according to another embodiment. Figure 9: Fingerprint scanning block BK5 and luminescence 2 The pole LEDs 5 are arranged in a rectangular range. Please refer to FIG. 10 , which illustrates a schematic diagram of a fingerprint identification device 600 according to another embodiment. In Figure 10, the fingerprint scanning block BK6 and the light emitting diode LED6 are arranged in a circular range. Please refer to FIG. 11 , which illustrates a schematic diagram of a fingerprint identification device 700 according to another embodiment. In Figure 11, the fingerprint scanning block BK7 and the light emitting diode LED7 are arranged within a long circular edge. Please refer to FIG. 12 , which illustrates a schematic diagram of a fingerprint identification device 800 according to another embodiment. In Figure 12, the fingerprint scanning block BK8 and the light emitting diode LED8 are arranged in a long strip.

In addition, the gaps between the scanning blocks do not necessarily need to be filled with light-emitting diodes. Please refer to FIG. 13 , which illustrates a schematic diagram of a fingerprint identification device 900 according to another embodiment. In the fingerprint identification device 900 in Figure 13, the fingerprint scanning block BK91 is a square, and the fingerprint scanning block BK92 is a pentagon. The light emitting diode LED9 is located between four adjacent pentagonal fingerprint scanning blocks BK92.

According to the above various embodiments, after the fingerprint identification device is enlarged, the fingerprint identification device in the standby state only needs to turn on the first scanner without turning on the second scanner and the light-emitting diode, so that the power loss can be minimized. . In addition, even when a finger is sensed, only a part of the second scanner is turned on, so that power consumption can be effectively reduced.

In summary, although the present disclosure has been disclosed in the above embodiments, they are not used to limit the present disclosure. Those with ordinary knowledge in the technical field to which this disclosure belongs can make various modifications and modifications without departing from the spirit and scope of this disclosure. Therefore, the protection scope of the present disclosure shall be subject to the scope of the appended patent application.

100:Fingerprint identification device

BK1: Fingerprint scanning block

CTR1: control unit

LED1: light emitting diode

SN1: First scanner

SN2: Second scanner

Claims (12)

A fingerprint identification device includes: a plurality of fingerprint scanning blocks. Each fingerprint scanning block includes: a first scanner located in the center of the fingerprint scanning block; and a plurality of second scanners surrounding the first scanning block. device; at least one light-emitting diode located between the fingerprint scanning blocks; and a control unit that activates the first scanners to sense a finger. If only part of the first scans are When the finger is scanned by the scanner, only the second scanners surrounded by the part of the first scanners that scan the finger are activated to scan a fingerprint on the finger. The fingerprint identification device of claim 1, wherein the control unit only activates the fingerprint scanning blocks in which the finger is scanned. The fingerprint identification device of claim 1, wherein the control unit senses the finger at a first frequency and scans the fingerprint at a second frequency, the first frequency being lower than the second frequency. The fingerprint identification device as claimed in claim 1, wherein the area of the fingerprint scanning areas is greater than 1 square centimeter. The fingerprint identification device of claim 1, wherein the control unit obtains at least one coordinate point according to the sensing result, and obtains a horizontal scanning range and a longitudinal scanning range based on the coordinate point. The fingerprint identification device as claimed in claim 1, wherein each fingerprint scanning block is in an octagonal shape, and each of the at least one light-emitting diode is located between four adjacent fingerprint scanning blocks. The fingerprint identification device as claimed in claim 1, wherein each of the fingerprint scanning blocks is circular, and each of the at least one light-emitting diode is located between three adjacent fingerprint scanning blocks. The fingerprint identification device as claimed in claim 1, wherein each of the fingerprint scanning blocks is circular, and each of the at least one light-emitting diode is located between four adjacent fingerprint scanning blocks. The fingerprint identification device as claimed in claim 1, wherein each of the fingerprint scanning blocks is square or pentagonal, and each of the at least one light-emitting diode is located between four adjacent pentagonal fingerprint scanning blocks. An operating method of a fingerprint identification device, wherein the fingerprint identification device includes a plurality of fingerprint scanning areas, at least one light-emitting diode and a control unit, and each fingerprint scanning area includes a first scanner and a plurality of second scanners , in each In the fingerprint scanning block, each first scanner is located in the center of each fingerprint scanning block, and the second scanners surround each first scanner. The operation method includes: the control unit activates the first scanners. scanner; and if part of the first scanners senses a finger, the control unit only activates the part of the second scanners surrounded by the part of the first scanners that scans the finger to detect the finger. Finger scan a fingerprint. The operating method of the fingerprint identification device as claimed in claim 10, wherein the control unit senses the finger at a first frequency and scans the fingerprint at a second frequency, the first frequency being lower than the second frequency. The operating method of the fingerprint identification device according to claim 10, wherein the control unit obtains at least one coordinate point according to the sensing result, and obtains a horizontal scanning range and a longitudinal scanning range based on the coordinate point.

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