JPH11318863A - Fingerprint inputting device and fingerprint examining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely record the fingerprint inputted picture of the finger tip to be examined by drying the fingerprinting part of the finger tip by a drying means, then bringing the fingerprinting part of the finger tip to an oil film applying means forming a uniform oil film so as to apply the oil film and then examining the fingerprinting part of the finger tip by a fingerprint examining means. SOLUTION: A fingerprint inputting part 100 consists of the finger tip drying means 30 drying the fingerprinting part of the finger tip 5, the oil film applying means 40 applying the uniform and thin oil film to the fingerprinting part of the finger tip, the fingerprint examining part 50 examining the fingerprinting part of the finger tip and a controlling means 60 totally controlling the respective means. The means 30 to be used at the device 100 is provided with a function removing sweat components stuck to the finger tip 5 from the surface of the finger tip 5 and the means 30 is desirably constituted of a finger tip inserting part 31 to insert the tip to be examined 5 and an air flow forming means 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fingerprint input device and a fingerprint inspection method, and more particularly to a fingerprint input device and a fingerprint inspection device, and more particularly, to a fingerprint inspection device, in particular, an image recognition means. The present invention relates to a fingerprint input device and a fingerprint inspection method.

[0002]

2. Description of the Related Art In recent years, with the spread of computers, ID cards and the like have been employed as identification means for assuring the existence, reliability and validity of individuals, but fingerprints are used as a more secure method. Although fingerprint input devices have been used, stable input performance and recognition performance are indispensable elements for future development.

Hitherto, as a fingerprint input device using a fingerprint as an individual identification means, a fingerprint input device using a prism has been used in many cases. That is, the principle of the fingerprint input device is to irradiate, for example, one inclined surface of the prism 6 with the light of the light source 2 from inside the glass as shown in FIG. Then, when the fingerprint portion of the fingertip 5 is pressed against the surface of the appropriate prism 6, as shown in FIG. 4B, the scattered light D In the valley line portion of the fingerprint, the incident light becomes total reflection light C, and the total reflection light C is transmitted to an appropriate image element of the image sensor 4 via the imaging optical system 3 outside the prism. A method has been put to practical use in which an image is formed on an image and the result is compared with appropriate stored data.

However, in the conventional fingerprint collation method, since the unevenness of the fingerprint is originally detected and recognized as image data, it is necessary that the ridges of the fingerprint adhere to the prism surface. The condition is that the valley line floats from the prism surface to form an air layer. However, since there is an individual difference in the amount of human skin secretions, even when the fingerprint is ridged and the degree of adhesion to the prism surface is low, it is totally reflected instead of the scattered light, even when the fingerprint is ridged. On the other hand, if the amount of skin secretion is too large, there is a problem that scattered light is generated even in a valley line, and an accurate fingerprint image cannot be obtained.

In other words, when sweat or the like adheres to the fingertip to be inspected, the valley between the ridges of the fingerprint portion is a portion which should normally be totally reflected due to the influence of skin secretions due to sweat. There was a problem that diffuse reflection occurred. In other words, as shown in FIG. 5A, when the fingertip 5 to be inspected having a certain fingerprint structure including the ridges 51 and the valleys 52 is inserted into a predetermined fingerprint input device, the condition becomes correct. In this case, fingerprint recognition data as shown in FIG. 5 (C) is obtained. However, if the skin of the fingertip is dry, the ridge 51 of the fingerprint portion is accurately detected. Since it is not pressed against the surface of the prism 6, fingerprint recognition data as shown in FIG. 5 (B) is obtained. If the skin of the fingertip contains a lot of skin secretions such as sweat, the fingerprint portion is removed. The skin secretion 53 enters the valley line 52 and the ridge 51
The skin secretion may also intervene at the interface between the lens and the prism 6, so that only inaccurate fingerprint recognition data can be obtained as shown in FIG.

Therefore, in such a situation, fingerprint input cannot be performed accurately, and there is a problem that fingerprint verification cannot be performed accurately. On the other hand, Japanese Patent Laid-Open No. 2-16
No. 7138 discloses a method of applying a volatile substance to a fingertip to be inspected and then applying a non-volatile liquid to the fingertip to be inspected to perform fingerprint recognition. There is a possibility that there is a danger to the human body due to handling, and it is not practical because there is a problem of odor and a problem that it takes a long time until the volatile substance is completely volatilized. Since the supply of the non-volatile liquid uses the dropping method, the amount of the substance adhered to the fingertip to be inspected becomes non-uniform, so that accurate recognition cannot be performed in image processing. is there.

Further, Japanese Patent Application Laid-Open No. 61-28171 describes a method of moistening a fingertip to be inspected before inputting a fingerprint, and Japanese Patent Application Laid-Open No. 2-149253 discloses a method for inputting a fingerprint. This document only describes the structure of the image sensor described above, but does not disclose a method of drying the fingertip to be inspected as preliminary processing for the inspection. or,
JP-A-5-309082 merely describes a method for measuring the dry or wet state of a fingertip to be inspected, and describes the necessity of actively drying the fingertip to be inspected. There is no.

[0008]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve the above-mentioned drawbacks of the prior art and to enable a fingerprint input image of a fingertip to be inspected to be accurately recorded under any environmental conditions. It is an object of the present invention to provide a fingerprint input device and a fingerprint inspection method that do not cause erroneous recognition.

[0009]

The present invention employs the following technical configuration to achieve the above object. That is, in the first aspect according to the present invention, after the fingerprint portion of the fingertip is dried by the drying device, the fingerprint portion of the fingertip is brought into contact with the oil film coating device on which the uniform oil film is formed. A fingerprint inspection method in which the fingerprint portion is applied to the fingerprint portion and then the fingerprint portion is inspected by fingerprint inspection means. In a second aspect according to the present invention, a fingertip drying device for drying the fingerprint portion of the fingertip is provided. Means, an oil film coating means for applying a uniform thin film oil film to the fingerprint portion of the fingertip, a fingerprint inspection means for inspecting the fingerprint portion of the fingertip, and a control means for comprehensively controlling the respective means. Fingerprint input device.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A fingerprint input device and a fingerprint inspection method according to the present invention employ the above-described technical configuration.
More specifically, since a dryer unit for drying the fingerprint unit and an oil film coating unit corresponding to a seal portion for attaching an oil film to the fingerprint unit are provided, the fingerprint unit of the fingertip is provided. By previously removing the water present in the fingerprint and applying a grease film to the fingerprint portion, it is possible to improve the above-mentioned disadvantages of the prior art.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the fingerprint inspection method and the fingerprint input device according to the present invention will be described below in detail with reference to the drawings. That is, FIG. 1 is a block diagram showing the configuration of a specific example of the fingerprint input device according to the present invention. In FIG. Oil film applying means 40 for applying a thin film of oil film, fingerprint inspection means 5 for inspecting a fingerprint portion of the fingertip
0 shows a fingerprint input device 100 including a control unit 60 for comprehensively controlling the respective units.

The fingertip drying means 30 used in the fingerprint input device 100 according to the present invention has a function of removing sweat components adhering to the fingertip 5 from the surface of the fingertip 5. Then, as shown in FIG. 2, for example, the fingertip drying means 30 is preferably composed of a fingertip insertion part 31 for inserting the fingertip 5 to be inspected, and an airflow forming means 32.

That is, the fingertip drying means 30 according to the present invention.
The purpose of the present invention is to remove moisture adhering to the surface of the fingertip 5 to be inspected, in particular, secretions due to sweat, and therefore, the air flow having a normal temperature or a predetermined temperature on the surface of the fingertip 5 to be inspected. Are brought into contact with each other to perform an operation of blowing off, air-drying, or evaporating the water. More specifically, the fingertip drying means 30 includes an air suction unit 33.
And an appropriate air duct 10 having an air exhaust portion 34, and a part of the air duct 10
The air duct 10 is provided with an appropriate air flow generating means 13 such as an electric fan at the same time as the fingertip insertion portion 31 is provided.

In the fingertip drying means 30, the temperature of the air flow can be set to an arbitrary value in the vicinity of the air flow generating means 13, for example, a temperature control means 11 composed of a resistor or the like.
It is also possible to arrange. Further, in the fingerprint input device 100 according to the present invention, it is determined whether or not the fingertip 5 to be inspected has been inserted into the fingertip insertion portion 31 of the fingertip drying means 30. The fingertip insertion identification means 12 to be performed may be arranged.

When the fingertip insertion identifying means 12 detects that the fingertip 5 to be inspected has been inserted into the fingertip inserting portion 31, the fingertip insertion identifying means 12 responds to an output signal of the fingertip insertion identifying means 12 to control the control means. 60 is configured to control the air flow generating means 13 and / or the temperature control means 11 to be driven. Further, in the present invention, when the fingertip insertion identifying means 12 detects that the fingertip 5 to be inspected has been inserted into the fingertip insertion part 31, the fingertip insertion identification means 12 is provided at an appropriate position of the fingertip insertion part 30. The displayed display means 14 may be configured to be driven, whereby the state in which the fingertip 5 to be inspected is currently inserted into the fingertip insertion section 30 or the state in which the fingertip drying means 30 is operating is displayed. , Can be notified via the display lamp 14 or the like as the notification means.

On the other hand, the fingerprint input device 10 according to the present invention
As shown in FIG. 3, which is an enlarged perspective view of the grease film applying means 40, the grease film applying means 40 basically has a long shape which carries a grease film having a uniform thickness. And a supporting member 19 for supporting the base member 20, and the base member 20 is desirably configured to be movable in a certain direction.

The substrate portion 20 used in the present invention
A predetermined length of the base material portion 20 is wound up in advance in an appropriate roller shape, and is mounted on an appropriate supply roller portion 16 mounted on the driven shaft 45, and an arbitrary length is fixed therefrom. It is configured to be pulled out intermittently at a speed. The moving speed, moving direction, moving pitch, and the like of the base member 20 are controlled by a winding drive roller 15 having an appropriate motor 21.
Can be determined by arbitrarily setting the driving conditions.

The driving conditions of the winding drive roller 15 are as follows.
It can be determined by the control means 60 described above. Further, in the oil film applying means 40 in the fingerprint input device 100 according to the present invention, the inspected fingertip 5 air-dried in the fingertip drying means 30 is attached to the oil film applying means 40. Support member 19 and base member 2
0, and is slightly pressed against the surface of the base member 20, so that the base member 20
Is transferred to the surface of the fingertip 5 to be inspected.

The base portion 20 is a long narrow structure made of paper, woven fabric, non-woven fabric, film, or the like, and has a porous structure capable of incorporating an oil or fat material therein. Is desirable. The support member 19 may have any structure as long as it has a function of slidably holding the base member 20 on the surface of the base member 20. Has a structure such that when the fingertip 5 to be inspected comes into contact with the surface of the base member 20, the surface of the base member 20 is slightly depressed. Is desirable.

That is, in the fingerprint input device 100 according to the present invention, the support member 19 and the support member 1 are provided.
The base material portion 20 passing over the upper surface 9 constitutes the oil film coating means 40. Further, the fingertip 8 to be inspected is attached to the base member 20 by the oil film applying means 40 according to the present invention.
Grease film coating operation execution identifying means 18 for detecting that the fingertip 8 to be inspected has come off from the base portion 20 or has come off.
It is also desirable that the information is provided.

The grease film application operation execution identifying means 18 comprises:
For example, it is possible to use appropriate optical sensor means. In the oil film applying means 40 according to the present invention, the winding drive roller 15 having the drive motor 21 is provided.
The controller 60 outputs a predetermined drive signal to the drive motor 21 of the take-up drive roller 15 in response to the output signal from the oil-and-fat-film-coating-operation execution identifying means 18 so that the roller 15 is intermittently driven. It is preferable that the surface of the base portion 20 in the oil / fat film adhering portion 41 is always updated with a new oil / fat film surface, so that it is always uniform and appropriate. It is possible to attach a large amount of oil film to the surface of the fingertip 5 to be inspected.

The oil film material that can be used in the present invention is not particularly limited. For example, animal oils and fats are preferable. Hereinafter, a more specific example of the fingerprint input device 100 according to the present invention will be described with reference to FIGS. As shown in FIG. 1, reference numeral 31 denotes a fingertip insertion unit of a fingertip drying means 30 corresponding to a dryer unit.
Is inserted, the optical sensor 12 detects the finger 5, the control circuit unit 60 as a control means is activated, and the display lamp 14
Lights up.

At the same time, a current flows through the resistance coil constituting the temperature control means 11 and the electric fan constituting the air flow generation means 13. As a result, the air sucked from the intake port 33 is heated by the resistance coil 11 and becomes hot air, hits the finger 5, and then passes through the air duct 10 to the exhaust port 34.

The above operation is controlled by the control means 60 and is stopped after counting a predetermined time. This allows
A skin secretion 53 which is water on the valley line 52 of the finger 5 in FIG.
Is evaporated to dryness. Next, the base member 2 of the support member 19
When the fingertip 5 to be inspected is pressed against the fingertip 0, for example, a fat or oil impregnated in an oil paper sheet constituting the base material portion 20 is attached to the ridges of the fingertip 5 to be inspected.

When the fingertip 5 to be inspected is pressed against the base part 20 made of an oil paper sheet or the like, whether or not the fingertip 5 to be inspected is in contact with the base part 20 by the optical sensor 18 is determined. Is detected. The detection signal is controlled by the control circuit section 60 to drive the take-up driving roller 15 to count the feed amount of the oil / fat sheet 20, send a predetermined amount, and stop.

Thus, the oil paper sheet 20 used once
Is rolled up by the drive roller 15, so that a new oil paper sheet 20 is always prepared for the next use. The fingerprint input method according to the present invention forms an image by pressing the fingerprint input surface 55 of the appropriate fingerprint sensor 1 constituting the fingerprint inspection means 50 with the oil and fat film adhered to the fingertip 5 to be inspected by the above procedure. Through the engineering system 3, the image is recognized by the image sensor 4 configured by a conventionally known image processing method.

That is, as shown in FIG. 4, the fingerprint sensor 1 reflects only the light from the light source 2 in the prism 6 while specularly reflecting the light from the light source 2 through the imaging optical system 3.
Enter. In this specific example, for example, when the fingertip 5 to be inspected is inserted into the fingertip insertion portion 31 of the fingertip drying means 30 in FIG. 2, the optical sensor 12 detects the fact and outputs an appropriate signal. In response to the current, the electric current is supplied to the electric fan 13 at the same time as the electric current flows to the resistance coil 11, and the electric fan 13 operates.

At the same time, the display lamp 14 is turned on. Further, as shown in FIG. 3, an oil paper sheet 20 as an example of the base member is an oil-absorbing sheet material. In this specific example, an oil paper roll 20 made of oil paper impregnated with oil is used. doing. The oil paper roll 20 is set on the drive roller 15 and the driven shaft 16 and is in a state where tension is always applied. The oil paper sheet 20 on the support member 19
When the finger 5 is pressed against the ridge, an oil film can be formed on the ridge of the finger 5.

Incidentally, the supporting member 19 is fixed, and when the finger 5 is pressed, the oil paper sheet 20 is brought into close contact with the finger so that the oil and fat can be easily attached. Further, in FIG. 3, when the finger 5 is pressed against the oil paper sheet 20, the finger 5 is detected by the optical sensor 18. When the finger 5 is released therefrom, the motor 21 operates and the drive roller 15
The oil paper sheet 20 is wound. The feed amount of the oil / fat sheet is controlled by the control circuit 60.

In the fingerprint inspection method according to the present invention, as described above, when the fingertip 5 to be inspected is placed on the fingerprint input surface, that is, one surface of the prism 6 and pressed against the fingerprint input surface, the light emitted from the inner surface of the prism becomes uneven. The ridges of the fingertip 5 to be inspected are easily adhered to the fingerprint input surface because the grease film is formed thereon. The valley line is the fingerprint input surface 6
There is a layer of air between them. The light from the light source of the fingerprint sensor 1 is totally reflected at the valley of the fingertip 5 to be inspected, but is not totally reflected at the ridge, so that the image of the ridge and valley of the finger can be clearly recognized.

This means that since a fingerprint input image can be accurately obtained, an image close to the input image can be obtained even during fingerprint collation, so that a fingerprint input device free from erroneous recognition can be provided. Next, a specific example of the fingerprint inspection method according to the present invention will be described. The configuration of this specific example is the same as the specific example described above.

Here, in this specific example, in FIG.
Reference numeral 6 denotes a fingerprint input surface, reference numeral 30 denotes a dryer unit for evaporating moisture in the fingerprint portion of the fingertip, and reference numeral 19 denotes a support member for forming an oil film on the fingerprint. The operation procedure is as follows. First, the fingertip 5 to be inspected is inserted into the fingertip insertion portion 31 of the fingertip drying means 30.
Since the display lamp 14 is turned on when it is put on the fingertip, the fingerprint portion of the fingertip 5 to be inspected is dried until it disappears. Is formed. Next, the fingertip 5 is pressed against the fingerprint input unit 1a to input a fingerprint.

That is, when the to-be-inspected fingertip 5 is placed on the fingertip insertion portion 31 of the fingertip drying means 30, the optical sensor 12 detects and displays the display lamp 14 and the control circuit 6
By the control of 0, the electric fan 13 is operated at the same time as the power supply to the resistance coil 11 is turned on. Then, the control circuit unit 6
After this operation is performed for a certain period of time by the timer 0, the indicator lamp 14 is extinguished, and the power supply to the resistance coil 11 and the power supply to the electric fan 13 are performed.

The purpose of the display lamp 14 is to indicate to the operator that the dryer function is in operation. As another method, a voice transmission method or an image display method may be used. I can't tell. Next, when the fingertip 5 is placed on the support member 19, the optical sensor 18 detects the state and outputs a predetermined detection signal.

When the fingertip 5 to be inspected is separated from the support member 19, the drive motor 21 is driven by the control of the control circuit 60, and the take-up drive roller 15 is driven. Is wound up by a certain amount. This is provided with a mechanism for automatically feeding out the used oil paper sheet 20 and feeding out a new oil paper sheet 20. That is, a new oil paper sheet is always prepared every time it is used.

Since the optical sensor 12 detects the presence or absence of a finger when the finger is placed on the fingertip drying means 30, another method such as a micro switch may be used in terms of function. Further, the oil and fat roll 20 may not necessarily be in the form of a roll but may be in the form of a belt. In the present invention,
The fingerprint input is performed with the fingerprint input surface 6 of the fingerprint sensor 1 kept in a state in which an oil film is formed on the fingertip 5 to be inspected by the above-described procedure.
Is recognized by the image sensor 4 through the imaging engineering system 3.

When a finger is put on the fingerprint input surface 6 and pressed against the fingerprint input surface, light emitted from the inner surface of the prism uniformly hits the concave and convex portions of the fingerprint. It becomes easy to adhere to. In addition, an air layer is formed between the valley line and the fingerprint input surface 6. The light from the light source of the fingerprint sensor 1 is totally reflected at the valley of the fingertip 5 to be inspected, but is not totally reflected at the ridge, so that the images of the ridge and valley of the finger can be clearly recognized. .

This means that since a fingerprint input image can be accurately formed, an image close to the input image can be obtained even during fingerprint collation, and a fingerprint input device free from erroneous recognition can be provided. That is, as described above, in the fingerprint inspection method according to the present invention, basically, after the fingerprint portion of the fingertip is dried by the drying means, a uniform oil film is formed on the fingerprint portion of the fingertip. This is a fingerprint inspection method in which the fingerprint portion is applied to the fingerprint portion by being brought into contact with an oil / fat film application device, and then the fingerprint portion of the fingertip is inspected by the fingerprint inspection device.

In the fingerprint inspection method, the drying means desirably air-drys the fingertip. Further, the drying means removes a sweat component adhering to the fingertip from the fingertip. It is desirable to remove it from the surface. Further, it is desirable that the oil film surface in the oil film coating means in the fingerprint inspection method of the present invention is updated to a new oil film surface each time the fingertip to be inspected comes into contact.

[0040]

Since the fingerprint input device and the fingerprint inspection method according to the present invention employ the above-described configurations, the first effect obtained by the fingerprint input device and the fingerprint inspection method is that the skin secretion of the finger is too much. In this case, the skin secretions adhering to the valleys are dried with a dryer, so that the possibility of misrecognition of the skin secretions and ridges at the fingerprint input surface is largely eliminated, and thereafter, only the ridges of the fingerprints are greased. Since the film is formed, the adhesion between the ridges and the fingerprint input surface is greatly improved, the difference between the ridges and the valleys can be recognized as a clear image, and errors in fingerprint recognition can be reduced.

A second effect of the present invention is that when the skin secretion in the fingerprint portion is too small, an oil film is formed on the ridge of the fingerprint, so that the fingerprint ridge and the fingerprint are not formed when the fingerprint is input. Since the adhesion between the input surfaces is greatly improved and the difference between the ridge line and the valley line can be recognized as a clear image, errors in fingerprint recognition can be reduced. As a result, in the present invention, there is an effect that a stable and clear fingerprint image can be always obtained which is not affected by the difference of the amount of skin secretion in the fingerprint part due to individual differences or environmental temperature, humidity and the like.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a specific example of a fingerprint input device according to the present invention.

FIG. 2 is a block diagram illustrating a configuration of a fingertip drying unit used in the fingerprint input device according to the present invention.

FIG. 3 is a block diagram illustrating a configuration of an oil film coating means used in the fingerprint input device according to the present invention.

FIG. 4 is a diagram illustrating the principle of a fingerprint inspection method.

FIG. 5 is a diagram illustrating a change in fingerprint recognition depending on a state of a fingertip to be inspected;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Fingerprint sensor 2 ... Light source 3 ... Imaging optical system 4 ... Image sensor 5 ... Fingertip to be inspected 6 ... Prism 10 ... Air duct 11 ... Temperature control means 12 ... Fingertip insertion identification means 13 ... Air flow generation means 14 ... Notification means DESCRIPTION OF SYMBOLS 15 ... Drive roller 16 ... Supply roller part 18, 24 ... Optical sensor 19 ... Support member 20 ... Substrate part 21 ... Motor 30 ... Fingertip drying means 31 ... Fingertip insertion part 32 ... Air flow formation means 33 ... Air suction part 34 ... Air exhaust unit 40 ... Oil film coating means 45 ... Followed shaft 50 ... Fingerprint inspection means 51 ... Ridge 52 ... Valley line 53 ... Skin secretion 60 ... Control circuit unit 100 ... Fingerprint input device

Claims (13)

[Claims] After drying a fingerprint part of a fingertip by a drying means,
After the fingerprint portion of the fingertip is brought into contact with the oil film coating means on which a uniform oil film is formed, and the oil film is applied to the fingerprint portion, the fingerprint portion of the finger tip is inspected by the fingerprint inspection means. A fingerprint inspection method characterized in that: 2. The fingerprint inspection method according to claim 1, wherein said drying means air-drys said fingertip. 3. The fingerprint inspection method according to claim 1, wherein the drying unit removes a sweat component adhering to the fingertip from the surface of the fingertip. 4. The oil / fat film surface in the oil / fat film applying means is updated to a new oil / fat film surface each time the fingertip to be inspected contacts. The described fingerprint inspection method. 5. Fingertip drying means for drying a fingerprint portion of a fingertip, oil film applying means for applying a uniform thin oil film on the fingerprint portion of the fingertip, fingerprint inspection means for inspecting the fingerprint portion of the fingertip, and A fingerprint input device comprising: a control unit that comprehensively controls each unit. 6. The fingerprint input device according to claim 1, wherein said fingertip drying means removes a sweat component adhering to said fingertip from said fingertip surface. 7. The fingerprint input device according to claim 5, wherein said fingertip drying means comprises a fingertip insertion portion for inserting a fingertip to be inspected, and an airflow forming means. 8. The fingerprint input device according to claim 7, wherein said fingertip drying means further includes a temperature control means for said air flow. 9. The fingerprint input device according to claim 7, wherein said fingertip drying means further includes fingertip insertion identification means for judging whether said fingertip to be inspected has been inserted in said fingertip insertion portion. . 10. The oil / fat film applying means is composed of a long base member for supporting an oil / fat film formed in a uniform thickness, and a support member for supporting the base material. The fingerprint input device according to claim 5, wherein the unit is configured to be movable in a fixed direction. 11. The fingerprint input device according to claim 10, wherein the substrate portion is supplied from a supply roller portion, and is wound at a predetermined speed by a winding roller portion. 12. The oil film coating means is constituted by the support member and the base member passing over the support member, and the fingertip to be inspected is applied to the base material by the oil film coating means. The fingerprint input device according to any one of claims 5 to 11, further comprising an oil film coating operation execution identification unit configured to detect that the fingertip to be inspected comes into contact with or separates from the base member. 13. The fingerprint according to claim 11, wherein the winding roller is configured to be driven intermittently in response to an output signal from the oil film coating operation execution identifying means. Input device.