JPS63175978A - Personal certification device - Google Patents

Abstract

PURPOSE:To input a stable finger print pattern by disposing a planar light transmitting member for placing a finger for inputting the finger print to a finger print input part, moving this light transmitting member by one screen at every input of the finger print and cleaning the surface of the light transmitting member. CONSTITUTION:The finger print is inputted through a glass 13. The transparent glass 13 is substantially horizontally held on a pair of carrier rollers 14, 14, and erected between these carrier rollers 14, 14, the carrier rollers 14, 14 are driven by a carrier control part 15 as necessary, thereby, the one screen is alternately moved in directions shown by arrows (a) and (b). Cleaning members 16, 16 brought into contact with the surface of the transparent glass 13 are disposed at positions corresponding to the carrier rollers 14, 14 on the surface of the transparent glass 13 so as to clean the surface of the glass with the movement of the transparent glass 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a personal authentication device that authenticates an individual using a fingerprint.

(Prior Art) FIG. 3 shows a conventional personal authentication device that authenticates an individual using a fingerprint. In the figure, 1 is a fingerprint input section, 2 is a fingerprint matching section, 3 is a fingerprint dictionary section, and 4 is a host machine. When performing authentication, first place the finger whose fingerprint is to be taken on the fingerprint input section 1. The fingerprint input unit 1 is configured as shown in FIG. 4, for example, and a finger 5 from which a fingerprint is to be taken is placed on a finger rest 6. The finger rest 6 is made of, for example, transparent glass, and fingerprint reading is performed here by utilizing total reflection of the glass. In other words, the light on the opposite side of the finger 5 with respect to the finger rest 6! The light from i7 enters the glass of the finger rest 6 and is reflected by the glass surface on which the finger 5 is placed, and the reflected light enters the light receiving element 8, which receives a signal corresponding to the fingerprint pattern formed on the glass surface. The fingerprint pattern signal is generated and sent to the fingerprint matching section 2. The fingerprint matching section 2 matches the input fingerprint pattern with a pre-registered fingerprint pattern stored in the fingerprint dictionary section 3, and sends the matching result to the host machine 4.
to be transmitted.

However, such conventional personal authentication devices are easily affected by dirt on the finger rest 6 or traces of fingerprints from the previous use, and there are problems such as the need to keep the finger rest 6 clean at all times. there were.

(Problems to be Solved by the Invention) As described above, the present invention is easily affected by dirt on the finger rest, fingerprint marks from the previous use, etc., and the finger rest needs to be kept clean at all times. The purpose of this invention is to provide a personal authentication device that is always clean and easy to use, allows stable fingerprint pattern input, and can be expected to improve performance.

[Structure of the Invention] (Means for Solving the Problems) The personal authentication device of the present invention includes a fingerprint input section, and a plate-shaped light-transmitting device disposed in the fingerprint input section on which a finger is placed for inputting a fingerprint. a photoelectric conversion means for converting a fingerprint pattern of a finger placed on the light-transmissive member into an electrical signal, a collation dictionary means for storing and storing registered fingerprint patterns in advance, and the photoelectric conversion means a collation means for collating an input fingerprint pattern, which is an output of the means, with a fingerprint pattern in the collation dictionary means; a moving means for moving the light-transmissive member by one screen as necessary; and cleaning means that moves relatively to the light transmitting member to clean the surface of the light transmitting member.

(Function) A plate-shaped light-transmissive member is placed on the fingerprint input section to place a finger for inputting a fingerprint, and this light-transparent member is moved by one screen each time a fingerprint is input, and the surface of the light-transparent member is moved. By cleaning the fingerprint input section, 'W41!' will always be displayed. A light-transmissive member has been developed, which allows it to be kept clean at all times and improves operability. Additionally, it is not affected by fingerprint marks from the previous use, unlike conventional devices, so stable fingerprint pattern input can be performed at all times, and performance can be expected to improve.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 11 denotes a window-shaped fingerprint input section, and a plate-shaped light-transmissive member, such as a fingerprint A plate-shaped transparent glass 13 having a thickness equivalent to two pattern screens is arranged, and a fingerprint is input through this transparent glass 13. The transparent glass 13 is attached to a pair of conveyor rows 5
It is held almost horizontally on the conveyor rollers 14, 14@14, and is in a state where it is mounted on the conveyor rollers 14, 14@. It is arranged to alternately move one screen in the direction of arrow a or b. Further, a cleaning member 16° 16 is provided in contact with the surface of the transparent glass 13 at a portion corresponding to the conveyance O-ra 14.14 on the surface of the transparent glass 13, and is used to prevent the movement of the transparent glass 13. At the same time, the surface is subjected to aIn.

The fingerprint input section 11 is formed into a window shape as described above, and the user places the finger 12 on the transparent glass 13 inside the fingerprint input section 11. When the user places the finger 12 on the transparent glass 13, the fingerprint pattern of the finger 12 is optically scanned by the photoelectric conversion means 18 and converted into an electrical signal. Here, for example, a light emitting diode is used as the light source 19, and the light from the light source 19 is transmitted through the optical system 20 and then through the transparent glass 13.
The light passes through and is irradiated onto the finger 12. The reflected light from the finger 12 is
A light receiving element 22 such as a COD sensor via an optical system 21
, and is output as a two-dimensional pattern electrical signal (fingerprint pattern signal) and sent to the fingerprint matching section 17 .

In this way, when you finish capturing the fingerprint pattern,
The fingerprint verification section 17 notifies the conveyance control section 15 of this fact. Then, the conveyance control unit 15 moves the transparent glass 13 in the direction of arrow a by driving the conveyance row 514.14 for a predetermined period of time.
Or move it one screen in the direction b. For example, in the state shown in FIG. 1, the transparent glass 13 is moved one screen in the direction of the arrow. At this time, as the transparent glass 13 moves, the cleaning member 16.16 provided in contact with the surface cleans the surface of the transparent glass 13.

Now, the fingerprint matching unit 17 has finished capturing the fingerprint pattern.
Verifies the input fingerprint pattern.

That is, the fingerprint matching unit 17 receives the input fingerprint pattern signal and compares the signal with a pre-registered user's fingerprint pattern stored in the fingerprint dictionary unit 23 . This fingerprint pattern comparison is performed by, for example, a pattern matching method or a feature extraction method. The results of the verification are transferred to the host machine 24, and an appropriate operation is performed according to the verification results, such as unlocking the door if the verification results match.

In this way, a plate-shaped transparent glass having the size of two fingerprint patterns is placed in the fingerprint input section, and the transparent glass is alternately moved by one screen each time a fingerprint is input. At the same time, by cleaning the surface of the transparent glass with the cleaning member, the cleaned transparent glass always appears on the fingerprint input section, so that it is always clean and the operability is improved. Additionally, it is not affected by fingerprint marks from the previous use, unlike conventional devices, so stable fingerprint pattern input can be performed at all times, and performance can be expected to improve.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a personal authentication device that is always clean and easy to use, allows stable input of fingerprint patterns, and is expected to improve performance.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing an embodiment of the present invention, Fig. 2 is a plan view showing the arrangement relationship between the transparent glass and the cleaning member in the same embodiment, and Figs. 3 and 4 are conventional personal authentication devices. FIG. 11... Fingerprint input section, 12... Finger, 1
3...Transparent glass (light transmitting member), 14...
...Transportation roller, 15...Transportation tfil'
lA section, 16...Cleaning member (cleaning means), 17
...Fingerprint verification unit (verification means), 18...
- Photoelectric conversion means, 23...fingerprint dictionary section (dictionary means for verification). Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2

Claims (4)

[Claims] (1) A fingerprint input section; A plate-shaped light-transmissive member disposed in this fingerprint input section on which a finger is placed for inputting a fingerprint; A fingerprint pattern of a finger placed on this light-transmissive member is photoelectric conversion means for converting into a signal; collation dictionary means for storing and storing fingerprint patterns registered in advance; collation of the input fingerprint pattern, which is the output of the photoelectric conversion means, with the fingerprint pattern in the collation dictionary means; a checking means for moving the light-transmitting member by one screen as needed; a cleaning means for moving the light-transmitting member relative to the light-transmitting member and cleaning the surface of the light-transmitting member. A personal authentication device comprising: (2) The personal authentication device according to claim 1, wherein the moving means alternately moves the light-transmitting member vertically or horizontally by one screen. (3) The cleaning means is fixed in contact with the surface of the light-transmitting member, and cleans the surface as the light-transmitting member moves. The personal authentication device according to paragraph or paragraph 2. (4) The personal authentication device according to claim 1, wherein the light-transmitting member is transparent glass.