JPH02194485A - Fingerprint data input device - Google Patents

Abstract

PURPOSE:To input a data of fingerprint pattern from which individual identification is attained with high accuracy through simple operation by detecting it that a fingerprint pattern taking face is depressed at a prescribed force and inputting the data of the fingerprint pattern. CONSTITUTION:Since a support member 3 has an elasticity, when a finger is pressed onto a fingerprint pattern taking face 7 provided to a transparent optical member 2, the transparent optical member 2 is displaced in a direction perpendicular to the face 7 with its pressing force, and when the pressing of the face 7 by a prescribed force is detected by a detection means 4, a control means 20 inputs an output of a photoelectric conversion means 6 as a fingerprint pattern data. The data of the fingerprint pattern depressed at a prescribed force is inputted by pressing a finger onto the fingerprint take face 7 in this way, and the data of the fingerprint pattern able to identify person is inputted with high accuracy and less mis-recognition.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a fingerprint data input device for inputting a fingerprint pattern as data.

B. Summary of the Invention The present invention is a fingerprint data input device that inputs a fingerprint pattern as data, and the fingerprint pattern data is input by detecting that the fingerprint pattern collection surface is pressed with a predetermined force. This allows fingerprint pattern data, which allows for highly accurate personal identification, to be input with a simple operation.

C1 Prior Art In general, various devices are known that perform highly accurate personal identification using the physical characteristics of the human body. Among these, fingerprint patterns are considered highly reliable as personal identification information that cannot be forged or transferred.

As a device for inputting fingerprint data manually using such a fingerprint pattern as data, for example, the one shown in the external perspective view of FIG. 9 is known.

That is, the conventional fingerprint data input device 100 has a housing 1
A sensor part 103 formed in a concave shape for inserting a finger 102, a key manual part] 04, a front button part 105, etc. are provided on the F side part of 01, respectively. The fingerprint pattern sampling surface portion 102 is formed of a transparent optical member, and a means for illuminating the finger 102 such as a light emitting diode (LED), an image pickup device (CCD image sensor), etc. is mounted below the optical member. Fingerprint pattern imaging means and the like are arranged.

In such a fingerprint data input device 100, the number of bacteria used is 1.
By pressing the L key manual unit 104 with another finger while pressing the finger 102 against the sensor portion 103, the means for illuminating the ffj l 02, the fingerprint pattern image means, etc. are activated. , the fingerprint pattern is input as data.

I]1 Problems to be Solved by the Invention However, in the conventional fingerprint data input device 100,
In order to input the data of the fingerprint pattern, two operations are performed: - Press the finger 102 against the sensor part 103 and use another finger to press the F key manual part 104 as described above. was necessary. For this reason, the conventional fingerprint data input device 100 has the disadvantage that operations for inputting fingerprint pattern data are complicated.

1-5 In the conventional fingerprint data input device 100, the fingerprint pattern is slightly deformed due to changes in the force with which the finger 102 is pressed against the sensor portion 103, so there is a high risk of misrecognition. There were also drawbacks, such as the need for complex data processing in order to accurately identify individuals.

The present invention has been proposed in view of the above circumstances, and its purpose is to provide a novel method that allows fingerprint pattern data, which can be used to identify individuals with high precision, to be inputted with an intermediate operation. An object of the present invention is to provide a fingerprint data input device having a unique configuration.

1.6 Means for Solving the Problems In order to achieve two objects, the fingerprint data human-powered device according to the present invention includes: a transparent optical member provided with a fingerprint pattern collection surface portion; a holding member that is elastically displaceable in a direction perpendicular to the sampling surface; a detection means that is attached to the optical member and detects when the sampling surface is pressed with a predetermined force; an illumination means for illuminating the surface; a photoelectric conversion means for collecting light from the illumination means reflected by the sampling surface through the optical member; and a photoelectric conversion means for photoelectrically converting the light reflected from the sampling surface; and control means for controlling the output of the photoelectric conversion means to be input as fingerprint pattern data.

Since the material has elasticity, when a finger is pressed against the fingerprint pattern sampling surface provided on the transparent optical member, the transparent optical member is displaced in a direction perpendicular to the fingerprint pattern sampling surface due to the pressing force.

- The detection means detects from the displacement of the optical member that the sampling surface section F is pressed with a predetermined force, and the detection output is sent to the control means.

Further, the fingerprint portion of the finger pressed against the sampling surface is illuminated by illumination means, and the reflected light from the sampling surface according to the fingerprint pattern is guided to the photoelectric conversion means and photoelectrically converted.

Then, in response to the detection output ζ from the J2 detection means, the control means inputs the output of the photoelectric conversion means as fingerprint pattern data.

Therefore, simply by pressing a finger against the L sampling surface, the data of the fingerprint pattern when pressed with a predetermined force is input.

F1 Effect In the fingerprint data input device according to the present invention, the holding section G is used.Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The fingerprint data input binding 1 according to the first embodiment of the present invention has a first
As shown in νJ and FIG. 2, a prism 2, which is an optical member, is held by a support portion 9, which is a part of the housing, via a damper 3, which is a holding member. The prism 2 is formed of a material f'-1 having good light transmittance, such as glass, so that its cross section has an approximately inverted triangular shape, and a switch serving as a detection means is provided at the lowest negative part of the prism 2. 4 is installed.

Further, in the vicinity of the left and right side surfaces of the beam 11 2, a 1° ED 5 as an illumination means and a CCD image sensor 6 as a photoelectric conversion means are arranged. And the above Sui 4. The LED 5 and the CCD image sensor 1/6 are electrically connected to a control section 20 which is a control means.

- A fingerprint pattern collection surface section 7 is provided on the two surfaces of the prism 2, and as shown in FIG.
The fingerprint part can be pressed against it. Further, the damper 3 is made of a material exhibiting a predetermined elasticity, and when the finger 8 is pressed against the sampling surface portion 7, the pressing force causes the sampling surface portion 1 to move as shown by arrow A in FIG. When the F prism 2 is displaced in a direction perpendicular to 7 and the prism 2 is displaced to a predetermined position, the switch 4 is turned on.

Further, as shown in FIG. 2, the sampling surface portion 7 of the prism 2 is
When the finger 8 is released, the prism 2 returns in the opposite direction to the arrow A as shown by the arrow B in the same figure, and the switch 4 marked with "-" is turned off. Therefore, when the switch 4 is turned on, it is detected that the sampling surface section 7 is pressed with a predetermined force, and the detection output is sent to the control section 20.
sent to.

Further, the fingerprint portion of the finger 8 pressed against the collection surface section 7 is illuminated with a desired illuminance by the light emitted from the LED 5 and diffused with a sufficient spread angle through the prism 2. ing. In addition, the above L E
The lighting of D5 may be controlled by the -F control unit 20, and for example, the light may be turned on only during the period when the switch 1-4 is on.

In the sampling surface section 7, as shown in FIG.
Behind the light Li from D5, the light that enters the part where the skin convex part of the fingerprint part of the finger 8 and the J2 collection surface part 7 are in contact becomes diffused light, and it comes into contact with the above-mentioned collection surface part 7 of the four parts of the skin. The light that enters the areas that are not covered is totally reflected and is reflected in the direction of the CCD image sensor 6! , becomes 0. The light Lo reflected by the sampling surface 7 is guided to the imaging lens 10 via the prism 2, passes through the imaging lens 1O, and is received by the CCD image sensor 6. It has become. Therefore, the CCD image sensor 6 can obtain an image output corresponding to the fingerprint pattern of the skin recess.

By using the prism 2 in the optical system in this way, it is possible to capture the fingerprint pattern of the finger 8 pressed against the sampling surface section 7 with sufficient contrast by the CCD image sensor 6.

FIG. 4 is a block diagram showing the electrical configuration of the control section 20. As shown in FIG. As shown in FIG. 4, the control section 20
consists of a latch circuit 21, each AND gate 22, 24, a delay circuit 23, an alley-log/digital (A/D) conversion circuit 25, a memory 26, an input interface 27, and a central processing unit 2 (CPtJ) 28. ing.

In the control section 20, the detection output from the switch 4 is supplied to the latch circuit 21, and, for example, at time 1 as shown in FIG. When switch 4 is on (high:
Then, as shown in FIG. 5(b), a latch pulse that becomes high (H) is formed from the above-mentioned time L1 and is sent to the above-mentioned AND gate 22.

The AND gate 22 receives a vertical synchronizing signal (Vsy) of the CCD image sensor 6 along with the two launch pulses.
nc) is supplied. The AND gate 22 outputs these AND signals, that is, the latch pulse, when it is high (!
During the period 1), the imaging output of the CCD image sensor 6 (shown in (a) in FIG. 5) becomes high (l() only in one vertical interval period (T) as shown in (c) in FIG. 5). A gate pulse as shown in is formed and supplied to the delay circuit 23.

The delay circuit 23 divides the gate pulses from the AND gate 22 vertically by one or several times in order to maximize the recognition rate of the fingerprint pattern. Delay by IJI period, 5th
1-4 by forming a delayed pulse as shown in (d) in the figure.
The signal is supplied to the AND gate 24.

The A N D gate 24 is supplied with the tl image output of the CCD image sensor 6 shown in (a) in FIG. 5 along with the delayed pulse. The AND gate 24 forms a fingerprint pattern output which becomes the imaging output during the period when the delay pulse is high (01), as shown in FIG. 5(e), from the logical product of these.

The fingerprint pattern output from the AND gate 24 is converted into digital data by the A/D conversion circuit 25 and sent to the memory 26.

Further, the detection output from the switch 4 is supplied to the CPU 28 via the human power interface 27. The CPU 2B issues an instruction to import the digital data into the memory 26 in accordance with the detection output, and also controls the operation of a system such as fingerprint pattern personal identification (not shown).

According to the fingerprint data input device 1 having such a configuration, the fingerprint pattern data is input simply by pressing the finger 8 against the sampling surface portion 7, so that the operation is very simple.

Furthermore, since input is performed when the sampling surface section 7 is pressed with a predetermined force, fingerprint pattern data can always be input in a constant state. Therefore, the risk of misrecognition can be reduced, and individuals can be identified with high accuracy without complex data processing.

Furthermore, since fingerprint pattern data can be input with the sensation of pressing a switch, the test subject will not feel uncomfortable.

FIG. 6 shows the configuration of a fingerprint data input device 60 according to a second embodiment of the present invention.

This fingerprint data input device 60 includes an LED 50 provided on the prism 2 side of a switch 40 attached to the top of the lowest portion of the prism 2. The LED 50 provided at the bottom of the prism 2 is configured to be supplied with current when the switch 4 is turned on, and the LED 50 is configured to be supplied with current when the switch 4 is turned on. When the switch 40 is turned on, it lights up. By adopting such a configuration, the configuration of the optical system can be simplified, and the L E D 50 can be turned on only when the switch 40 is on, without having to control the lighting of the L E D 50 by the control unit 20.
The LED 50 can be turned on, and constant lighting can be prevented.

Note that the other parts can be the same as the fingerprint data input device 1 shown in FIG.

However, in the case of the fingerprint data input device 60, since the LED 50 guides the light Li from almost directly below the sampling surface section 7 to the fingerprint section of the finger 8, as shown in FIG. The light that enters the part that is not in contact with the skin convex part and the sampling surface part 7 becomes diffused light, and the light that enters the part that is in contact with the skin convex part and the sampling surface part 7 is totally reflected and becomes light Lo in the direction of the CCD image sensor 6. Become. For this reason, the above CC
The D image sensor 6 provides an image output corresponding to the fingerprint pattern of the skin convex portion.

As an applied example, FIG. 8 shows an example of a mouse device using the fingerprint data input device according to the present invention as an input operation switch. J. The mouse device 80 is equipped with two input operation switches 81.82, and each of the above-mentioned manual operation switches 81.8
Both or one of the devices 2 and 2 is configured with a fingerprint data input device according to the present invention. Mouse device like this 2
By using the input operation switch 81.80, the input operation switch 81.
Fingerprint pattern data can be input in response to a pressing operation 82, and the mouse device 80 can be configured to only accept input operations by a specific person.

H. Effects of the Invention The human fingerprint data device according to the invention is configured in a double series, so that by simply pressing one finger on the fingerprint pattern collection surface, the fingerprint data when pressed with a predetermined force is detected. Pattern data is input.

Therefore, it is very easy to operate.Firstly, since fingerprint pattern data can always be entered in a constant state, there is less risk of misrecognition and highly accurate personal identification is possible.
It is possible to input data of a valid fingerprint pattern.

[Brief explanation of the drawing]

1 and 2 are diagrams showing a schematic configuration of a fingerprint data input device according to a first embodiment of the present invention, in which FIG. 1 shows a state in which a finger is pressed against a surface from which a fingerprint pattern is collected. , and FIG. 2 shows the above-mentioned finger released and the bark. FIG. 3 is a schematic diagram for explaining the reflection of light on the sampling surface of the fingerprint data input device, FIG. 4 is a schematic diagram showing the configuration of the control section of the fingerprint data input device, and FIG. 5 is a schematic diagram of the control section of the fingerprint data input device. This is a time chart for explaining the operation. FIG. 6 is a schematic diagram showing the M1 configuration of the fingerprint data input device according to the second embodiment of the present invention, and FIG. 7 is a schematic diagram for explaining the reflection of light on the collection surface of the J-recorded fingerprint data input device. It is. FIG. 8 is an external perspective view showing an application example of the fingerprint data input device according to the present invention. FIG. 9 is an external perspective view for explaining a conventional 1h pattern data input device. 1.60... Fingerprint data input device 2... Prism 3 which is an optical member... Damper which is a holding member 4.40... Switch 5.50 which is a detection means...
LjE D6 which is illumination means... C Ci which is photoelectric conversion means Image sensor 20... Control unit which is control means

Claims (1)

[Scope of Claims] A transparent optical member provided with a fingerprint pattern collection surface portion; a holding member that holds the optical member so as to be elastically displaceable in a direction perpendicular to the collection surface portion; a detection means for detecting that the collection surface section is pressed with a predetermined force; an illumination means for illuminating the collection surface section through the optical member; and a detection means for illuminating the collection surface section through the optical member; A fingerprint data input device comprising: a photoelectric conversion means that receives light through the sensor and performs photoelectric conversion; and a control means that performs control to input the output of the photoelectric conversion means as fingerprint pattern data in accordance with the detection output of the detection means. Device.