JP2002185843A - Information terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information terminal that is provided with an image pickup function that is configured to be suitable for downsizing, without providing different optical systems different for usual photographing and fingerprint photographing. SOLUTION: A focal position moving device 17 selects a camera mode position P1 of two focal positions where a focal distance of an image pickup element 16, placed on an image pickup axis Q via an image pickup lens 15 and an image pickup window 14 is set to be infinitive or a fingerprint authentication mode position P2, where the focal distance is set to a distance (close) up to a fingerprint face of a finger F, while a fingerprint read range of the finger F (e.g. toward a tip from a 1st joint) is matched with an emission range of an emitted light R by a light source 18, and a common optical system can capture an image by the usual photographing and a fingerprint image. Thus, the proper fingerprint image can be obtained in spite of a small-sized device configuration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an information terminal device such as a PDA (Personal Digital Assistants) or a cellular phone having an imaging function.

[0002]

2. Description of the Related Art In recent years, by connecting to the Internet using a portable terminal device such as a PDA or a portable telephone, a desired Web site has been established.
Access to the site is becoming routine.

[0003] In such access processing on the Internet, there are occasions where identity verification is often required due to security problems. However, identity verification based on simple identification of ID codes or passwords is not reliable because of low reliability. It is desired to add a personal identification function using a fingerprint.

[0004]

On the other hand, as a conventional portable terminal device, a PDA or a cellular phone having an image pickup function equipped with a small CCD (charge coupled device) camera is also in practical use. If a portable terminal device with an imaging function is to be used to capture a fingerprint image, it is necessary to arrange a plurality of different optical systems for normal photographing and fingerprint photographing, and to switch and use these optical systems.
There is a problem that it is difficult to make the configuration suitable for miniaturization.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and does not require a plurality of different optical systems for normal photographing and fingerprint photographing. It is an object of the present invention to provide an information terminal device having an imaging function.

[0006]

That is, an information terminal device according to the present invention comprises an image pickup unit having one image pickup element and a lens system, and changing the distance between the image pickup element and the lens system in this image pickup unit. A focal length switching unit for switching the focal length by switching the focal length in the imaging unit by the focal length switching unit in accordance with switching between a normal imaging mode and a fingerprint imaging mode. .

In such an information terminal device according to the present invention, even if the imaging unit has one imaging device and a lens system, the distance between the imaging device and the lens system in this imaging unit is changed to change the focus. The focal length can be switched to the focal length according to the switching between the normal photographing mode and the fingerprint photographing mode by the focal length switching means for switching the distance. You can do it.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 is a diagram showing the configuration of a portable terminal device according to a first embodiment of the information terminal device of the present invention, and FIG. 1A is a front perspective view showing the external configuration. FIG. 1B is a partial sectional view showing the configuration of the imaging unit.

On the front face 10a of the main body 10 of the portable terminal device, a key input unit 11 provided with keys for inputting numbers, characters, and symbols, an instruction key for transmission / reception, various function keys, a selection / cursor key, and a liquid crystal display. A display unit 12 is provided;
An antenna 1 for telephone communication is provided on an upper surface 10b of the main body 10.
3 are provided.

An imaging window 14 is provided in the lower surface 10c of the main body 10, and an imaging lens 15 is provided in the imaging window 14.
Is attached.

An image pickup device 16 using a CCD is disposed inside the main body 10 on the image pickup axis Q from the image pickup window 14 through the image pickup lens 15, and the image pickup device 16 uses a piezo actuator. The focus position moving device 17 is mounted as a mechanism that can be slid and switched between two focus positions along the imaging axis Q, a camera mode position P1 and a fingerprint authentication mode position P2.

The image pickup lens 15 and the image pickup device 16
A light source 18 using an LED that is turned on in the fingerprint authentication mode is provided on the side of the imaging axis Q between the light source 18 and the illumination light R from the light source 18.
The reflection of the half mirror 19 arranged on the imaging axis Q between the camera and the imaging element 16 causes the light to radiate downward through the imaging lens 15 and the imaging window 14 to illuminate the fingerprint capturing range of the finger F. .

The focal length when the image pickup device 16 is slid to the camera mode position P1 by the focus position moving device 17 is set to infinity, and the focal length when the image pickup device 16 is slid to the fingerprint authentication mode position P2. Is set as the distance (proximity) to the fingerprint surface of the finger F when the fingerprint reading range of the finger F (for example, the tip side from the first joint) is adjusted to the irradiation range of the irradiation light R by the light source 18.

FIG. 2 is a block diagram showing a configuration of an electronic circuit of the portable terminal device.

The electronic circuit of the portable terminal device has a control unit (CPU) 21 which is a computer.

The control unit (CPU) 21 is an EEP-ROM
The operation of each part of the circuit is controlled in accordance with the terminal device control program stored in advance in the storage device 22 using the terminal device control program. The terminal device control program stored in the storage device 22 includes, for example, the key input unit. 11 is activated in response to a key operation signal input from the key unit 23 in response to the operation of 11.

In the storage device 22, as a program for controlling the terminal device, a system program 22a for controlling the whole operation, a communication control program 22b for performing a communication process with a telephone base station, and a fingerprint collation process are performed. Fingerprint matching program 22c is stored in advance, registered fingerprint image data 22d in which a fingerprint image of the owner of the terminal device body 10 is registered, and a registered telephone number in which the telephone number of the terminal device body 10 is registered Data 22e and the like are stored.

The control unit (CPU) 21 includes, in addition to the storage device 22 and the key unit 23, a communication unit 24 mainly composed of a transmission / reception circuit with a telephone base station and a voice input / output circuit. An image pickup unit 25 for digitally processing optical image data picked up by the element 16 and taking it in; a RAM including various work data memories
26, and a display unit 27 including a liquid crystal driving circuit for displaying various display data on the liquid crystal display unit 12 on a screen is connected.

The RAM 26 stores a mode data memory 26a in which data indicating a currently set mode of the camera mode or the fingerprint authentication mode is stored, and a slide of the image pickup device 16 by the focus position moving device 17 in the image pickup unit 25. An imaging position data memory 26b in which data indicating whether the position is in the camera mode position P1 or the fingerprint authentication mode position P2 is stored. The fingerprint image data to be collated taken from the imaging unit 25 in the fingerprint authentication mode is stored. A stored fingerprint collation image memory 26c, a telephone directory data memory 26d in which telephone numbers and names of acquaintances and friends are appropriately registered and stored, and a control unit (CPU) according to various control programs stored in the storage device 22. ) Various data input / output to / from 21 may be temporarily A work memory 26 to be stored and held in
e is prepared.

The switching operation of the image pickup device 16 between the camera mode position P1 and the fingerprint authentication mode position P2 by the focus position moving device 17 of the image pickup unit 25 is as follows.
It is executed in response to an instruction by a key operation on the key input unit 11.

Next, the operation of the portable terminal device having the above configuration will be described.

FIG. 3 is a flowchart showing the overall processing of the portable terminal device.

When the power is turned on by operating the key input unit 11, the RA is first used in order to exclude use by anyone other than the user.
Data indicating the fingerprint authentication mode is set in the mode data memory 26a in the M26 and the fingerprint collation program 2
2c is started, and the process proceeds to the fingerprint matching process (see FIG. 4) (step S1 → SA).

FIG. 4 is a flowchart showing a fingerprint collation process accompanying the comprehensive process of the portable terminal device.

In this fingerprint collation processing, the registered fingerprint image data 22d of the owner of the apparatus main body 10 registered in the storage device 22 or the web site of the Internet, and the collated fingerprint image data currently captured by the imaging unit 25 When the fingerprint matching process is started, data indicating the slide position of the image sensor 16 stored in the image capturing position data memory 26b in the RAM 26 is read out, and the fingerprint authentication mode position P2 is read. It is determined whether “OK” has been switched to “OK” or “NG” has not been switched (step A1).

Here, the slide position of the image sensor 16 in the image pickup unit 25 is the fingerprint authentication mode position P2.
Is determined to be "OK", the irradiation range of the irradiation light R radiated from the imaging window 14 of the lower surface 10c of the apparatus main body 10 is irradiated with the fingerprint range at the tip from the first joint of the finger F. The fingerprint image of the user in the state is
Is read by the image pickup device 16 via the CPU and stored in the collation fingerprint image memory 26c in the RAM 26 (step A).
1 → A2).

Then, the collation fingerprint image stored in the collation fingerprint image memory 26c in the RAM 26 and the storage device 2
2 or registered fingerprint image data 22d of the owner of the apparatus main body 10 registered on the Internet web site
Is performed by matching / mismatching the images, and it is authenticated whether or not the current user is the owner (step A3).

On the other hand, in step A1, the slide position of the image sensor 16 in the image pickup unit 25 is "NG" which has not been switched to the fingerprint authentication mode position P2.
If it is determined that the switching to the fingerprint authentication mode position P2 has not been made, the user is notified as an error by a beep or a message display (steps A1 to A4).

Thus, when switching from the camera mode position P1 of the imaging device 16 to the fingerprint authentication mode position P2 of the image pickup device 16 by the focus position moving device 17 is performed in response to an instruction by a key operation on the key input section 11, The process proceeds to step A2, where the fingerprint image of the user who has entered the irradiation range of the irradiation light R is read by the image sensor 16, and the read fingerprint image is used as a verification fingerprint image for verification / authentication with the registered fingerprint image. Processing is performed (steps A5 → A2, A3).

When the user is authenticated as the owner through the fingerprint collation processing (step SA), the operation of the communication unit 24 is controlled according to the communication control program 22b, and the communication processing by telephone with the desired partner is performed. Various processes desired by the user, such as a process for accessing a desired web site on the Internet or the Internet, are executed (step S2).

If, for example, a request for authentication of an access user by fingerprint collation is received in connection with a process for accessing a desired web site on the Internet, the process proceeds to the fingerprint collation process similar to the above (see FIG. 4). It is shifted (step S3 → SA), and the we are accessing the current user.
Authentication processing by fingerprint collation for whether or not the user is registered at the site b is performed (steps A1 to A5).

Therefore, according to the imaging function in the portable terminal device of the first embodiment having the above-described configuration, the imaging device 16 disposed on the imaging axis Q from the imaging window 14 via the imaging lens 15 is moved to the focus position moving device. A camera mode position P1 at which the focal length is set to infinity by a light source 18;
The fingerprint authentication mode position P2 set to the distance (close proximity) to the fingerprint surface of the finger F when the fingerprint reading range of the finger F (for example, the tip side from the first joint) is adjusted to the irradiation range of the irradiation light R by the finger F In this case, switching between the two focal positions can be performed so that normal photographing and fingerprint image capture can be performed with a common optical system, so that a good fingerprint image can be obtained with a small device configuration.

(Second Embodiment) FIG. 5 is a diagram showing an external configuration of a portable terminal device according to a second embodiment of the information terminal device of the present invention. FIG. FIG. 2B is a front perspective view showing the external configuration when the camera mode switching is set.

FIG. 6 is a partial cross-sectional view showing the configuration of the imaging unit 25A of the portable terminal device according to the second embodiment. FIG. 6A is a diagram showing a fingerprint imaging state when the fingerprint authentication mode switching is set. FIG. 7B is a diagram showing a normal shooting state when camera mode switching is set.

In the portable terminal device according to the second embodiment, the imaging direction of the main body 10A is changed with respect to the upper end of the main body 10A.
An imaging unit 25A is provided that can be rotated 90 ° up and down in the direction opposite to the front face 10a of 0A (normal imaging direction) and the inside direction of the main body 10A (fingerprint imaging direction) as shown by an arrow a.

The imaging unit 25A includes the main body 10A.
(Normal shooting direction) and the body 1
An imaging lens 15 is provided on one side surface which can be switched to an internal direction of 0A (fingerprint photographing direction).
The imaging element 16 is disposed on the far side of the imaging axis Q via the.

The image pickup device 16 is provided on the image pickup axis Q when the image pickup unit 25A is switched to the normal photographing direction or when the photographing direction is switched to the fingerprint photographing direction by the focus position moving device 17 using a piezo actuator. (Infinity focus) position P1 along the camera
And a fingerprint authentication mode (close focus) position P2.

At a position adjacent to the imaging unit 25A at the upper end inside the main body 10A, the imaging direction of the imaging unit 25A is switched to the interior direction (fingerprint imaging direction) of the main body 10A. A half mirror 19 is provided for refracting Q and guiding it to the direction of the imaging window (transparent plate) 14 on the front face 10a of the main body 10A.

Further, on the inner wall on the back side of the main body 10A corresponding to the arrangement position of the imaging window 14, a light source 18 which is driven to be lit when the imaging direction of the imaging unit 25A is switched to the fingerprint imaging direction. Irradiation light R from the light source 18 is transmitted through the half mirror 19 and is radiated to the outside from the imaging window 14 to irradiate a fingerprint surface of a finger F pressed against the imaging window 14.

That is, when the fingerprint authentication mode switching is set, as shown in FIGS. 5A and 6A, the imaging direction of the imaging unit 25A is switched to the fingerprint imaging direction toward the inside of the main body 10A. The focal length becomes the close-up photographing state (P2), and the fingerprint of the finger F pressed against the imaging window 14 is illuminated by the irradiation light R from the light source 18 and passes through the half mirror 19 and the imaging lens 15. An image is captured by the image sensor 16.

When the camera mode switching is set,
As shown in FIGS. 5 (B) and 6 (B), the imaging direction of the imaging unit 25A is switched to the normal imaging direction opposite to the front surface 10a of the main body 10A, and the focal length thereof is set to an infinite imaging state (P1). ), The images in the same direction are directly taken in from the imaging lens 15 and imaged by the imaging element 16.

The configuration and operation of the electronic circuit of the portable terminal device according to the second embodiment are described in FIGS.
This is substantially the same as the case of the mobile terminal device according to the first embodiment, and the description thereof is omitted.

Therefore, according to the imaging function of the portable terminal device of the second embodiment having the above-described configuration, the imaging lens 15
The image pickup unit 25A incorporating the focus position moving device 17 and the image pickup device 16 at the upper end of the apparatus main body 10A has an image pickup direction facing the front 10a of the main body 10A (normal shooting direction) and an internal direction of the main body 10A. (Fingerprint shooting direction) is provided so as to be switchable, and when the fingerprint authentication mode switching is set, the close-up shooting state (P2)
Through the half mirror 19 disposed directly below the imaging unit 25A inside the upper end of the main body 10A.
Since the fingerprint surface of the finger F pressed against the imaging window 14 on the front surface 10a is illuminated by the irradiation light Q from the light source 18 and is imaged by the imaging device 16 in the imaging unit 25A, a common optical system is used. Thus, normal photographing and fingerprint image capture can be performed, and a good fingerprint image can be obtained with a small device configuration.

(Third Embodiment) FIG. 7 is a diagram showing an external configuration of a portable terminal device according to a third embodiment of the information terminal device of the present invention. FIG. FIG. 2B is a front perspective view showing the external configuration when the camera mode switching is set.

FIG. 8 is a partial cross-sectional view showing the configuration of the imaging unit 25B of the portable terminal device according to the third embodiment. FIG. 8A is a diagram showing a fingerprint imaging state when the fingerprint authentication mode switching is set. FIG. 7B is a diagram showing a normal shooting state when camera mode switching is set.

In the portable terminal device according to the third embodiment, the upper left half of the main body 10B is taken in the direction opposite to the front face 10a of the main body 10B (normal shooting direction) and the right upper half of the main body 10B. Internal direction (fingerprint shooting direction)
In addition, as shown by an arrow b, the imaging unit 25B is configured to be capable of being rotated 90 ° left and right to be switched.

The imaging unit 25B includes the main body 10B
(Normal shooting direction) and the body 1
An imaging lens 15 is provided on one side surface which can be switched to the inner direction (fingerprint imaging direction) of the upper right half of the upper end of the image sensor 0B.
Is arranged.

The image pickup device 16 is provided on the image pickup axis Q when the image pickup unit 25B is switched to the normal photographing direction or when the photographing direction is switched to the fingerprint photographing direction by the focus position moving device 17 using a piezo actuator. (Infinity focus) position P1 along the camera
And a fingerprint authentication mode (close focus) position P2.

An imaging window (transparent plate) 14 is provided on the side of the upper right half of the main body 10B opposite to the imaging unit 25B.

Further, on the inner wall of the upper right half of the main body 10B in which the imaging window 14 is disposed, the imaging unit 2 is provided.
A light source 18 is provided which is turned on when the imaging direction of 5B is switched to the fingerprint imaging direction, and irradiation light R from this light source 18 is radiated to the outside from the imaging window 14 and faces the imaging window 14. Irradiates the fingerprint surface of the finger F pressed.

That is, when the fingerprint authentication mode switching is set, as shown in FIGS. 7A and 8A, the image pickup direction of the image pickup unit 25B is directed to the inside of the upper right half of the main body 10B. Direction, the focal length thereof changes to the close-up shooting state (P2), and the fingerprint of the finger F pressed against the imaging window 14 is illuminated by the irradiation light R from the light source 18 and passes through the imaging lens 15. And is imaged by the image sensor 16.

When the camera mode switching is set,
As shown in FIG. 7B and FIG. 7B, the imaging direction of the imaging unit 25B is switched to the normal imaging direction opposite to the front face 10a of the main body 10B, and the focal length thereof is set to an infinite imaging state (P1). ), The images in the same direction are directly taken in from the imaging lens 15 and imaged by the imaging element 16.

The structure and operation of the electronic circuit of the portable terminal device according to the third embodiment are described in FIGS.
This is substantially the same as the case of the mobile terminal device according to the first embodiment, and the description thereof is omitted.

Therefore, according to the imaging function of the portable terminal device of the third embodiment having the above-described configuration, the imaging lens 15
Unit 25B incorporating the focus position moving device 17 and the image sensor 16 as the upper left half of the apparatus main body 10B, and the imaging direction is the front 10a of the main body 10B.
The main body 10B is provided so as to be rotatable in a direction opposite to the main body 10B (in a normal photographing direction) and in an inner direction (fingerprint photographing direction) of the upper right half of the main body 10B. The fingerprint surface of the finger F pressed against the imaging window 14 on the right side through the upper right half portion is illuminated by the irradiation light Q from the light source 18 and is imaged by the imaging device 16 in the imaging unit 25B. Therefore, normal photographing and fingerprint image capturing can be performed by a common optical system, and a good fingerprint image can be obtained with a small device configuration.

(Fourth Embodiment) FIG. 9 is a diagram showing an external configuration of a portable terminal device according to a fourth embodiment of the information terminal device of the present invention. FIG. FIG. 2B is a front perspective view showing the external configuration when the fingerprint authentication mode switching is set.

FIG. 10 is a partial cross-sectional view showing the configuration of the image pickup unit of the portable terminal device according to the fourth embodiment. FIG. 10A shows a normal photographing state when camera mode switching is set. (B) is a diagram showing a fingerprint photographing state when the fingerprint authentication mode switching is set.

In the portable terminal device according to the fourth embodiment, the key input portion 11a of the device body 10C is covered with a protective cover 20 slidable in the direction indicated by the arrow c, and the lower end of the protective cover 20 is transparent. A plate imaging window 14 is provided.

An image pickup lens 15 is attached to the lower end of the key input section 11a covered by the protective cover 20, and an image pickup element 16 is provided on the image pickup axis Q inside the main body 10C from the image pickup lens 15. Is arranged.

The image pickup device 16 is provided with a camera mode (infinity) along the image pickup axis Q when the protective cover 20 is closed or opened by the focus position moving device 17 using a piezo actuator. It is mounted as a mechanism for performing a slide switching operation between two focal positions, that is, a focal position P1 and a fingerprint authentication mode (close focus) position P2.

Further, at a position adjacent to the imaging lens 15 at the lower end of the key input section 11a, a light source 18 is provided which is driven to light when the protection cover 20 is slid and the key input section 11a is opened. This light source 1
Irradiation light R from 8 is radiated outside from the imaging window 14,
The fingerprint surface of the finger F pressed against the imaging window 14 is irradiated.

Here, the state where the key input section 11a is covered by the protective cover 20 is a normal photographing position according to the setting of the camera mode, and the state where the protective cover 20 is slid and the key input section 11a is opened is a fingerprint. This is set as the fingerprint imaging position according to the setting of the authentication mode.

That is, when the camera mode switching is set, as shown in FIGS. 9A and 10A, the protective cover 20 is closed and switched to the normal photographing position, and the focal length is set to the infinite photographing state (P1). ), And the imaging window 14
The image in the direction facing is captured through the imaging window 14 and the imaging lens 15 and is captured by the imaging device 16.

When the fingerprint authentication mode switching is set, as shown in FIGS. 9B and 10B, the protective cover 20 is opened and switched to the fingerprint photographing position, and the focal length is set to the close photographing state (P2). ), The fingerprint of the finger F pressed against the imaging window 14 is illuminated by the irradiation light R from the light source 18 and is imaged by the imaging element 16 via the imaging lens 15.

The structure and operation of the electronic circuit of the portable terminal device according to the fourth embodiment are described in FIGS.
This is substantially the same as the case of the mobile terminal device according to the first embodiment, and the description thereof is omitted.

Therefore, according to the imaging function of the portable terminal device of the fourth embodiment having the above configuration, the key input unit 11
a key input portion 11a covered by the protective cover 20a
An image pickup unit incorporating an image pickup lens 15, a focus position moving device 17 and an image pickup device 16 is provided at the lower end of the cover 2.
0 is provided at the lower end surface of the camera cover 0, and when the protection cover 20 is slid to switch to the fingerprint imaging position in which the key input unit 11a is opened, the imaging window 14 at the lower end of the protection cover 20 is set to the close-up imaging state (P2). The fingerprint surface of the finger F pressed against the camera is illuminated by the irradiation light Q from the light source 18 and is imaged by the imaging device 16 inside the lower end of the key input unit 11a. And a fingerprint image can be captured, and a good fingerprint image can be obtained with a small device configuration.

(Fifth Embodiment) FIG. 11 is a diagram showing an external configuration of a portable terminal device according to a fifth embodiment of the information terminal device of the present invention, and FIG. FIG. 2B is a front perspective view showing the external configuration when the fingerprint authentication mode switching is set.

FIG. 12 is a partial cross-sectional view showing the configuration of the imaging unit of the portable terminal device according to the fifth embodiment. FIG. 12A shows a state where the imaging unit is stored when not in use. (B) is a diagram showing a fingerprint photographing state when the fingerprint authentication mode switching is set.

In the portable terminal device according to the fifth embodiment, the key input section 11a of the device main body 10D is covered with a protective cover 20A slidable in the direction shown by the arrow c. Plate imaging window 14
Is provided.

An image pickup lens 15 is attached to the lower end of the key input section 11a covered by the protective cover 20A, and an image pickup element 16 is mounted on the image pickup axis Q inside the main body 10D from the image pickup lens 15. Is arranged.

The imaging element 16 is moved by a focus position moving device 17 using a piezo actuator between a camera mode (infinity focus) position P1 and a fingerprint authentication mode (near focus) position P2 along the imaging axis Q. It is attached as a mechanism that performs a slide switching operation at the two focal positions.

The switching operation between the camera mode position P1 and the fingerprint authentication mode position P2 of the image sensor 16 by the focus position moving device 17 is executed in response to an instruction by a key operation on the key input unit 11.

Further, at a position adjacent to the image pickup lens 15 at the lower end of the key input section 11a, a light source 18 which is driven to light when the protection cover 20A is slid and the key input section 11a is opened is provided. Irradiation light R from the light source 18 is reflected 90 ° by the mirror 30 mounted on the bottom surface of the protective cover 20A facing the imaging lens 15 via support springs 30a and 30b, and is reflected from the imaging window 14. It is radiated to the outside and the imaging window 14 concerned
Irradiate the fingerprint surface of the finger F pressed against the.

Here, the state in which the key input section 11a is covered by the protective cover 20A is a storage position of the imaging unit when not in use, and the state in which the protective cover 20A is slid and the key input section 11a is opened is a fingerprint. This is set as the fingerprint imaging position according to the setting of the authentication mode.

That is, at the time of unused setting, FIG.
(A) and FIG.
A is closed and switched to the imaging unit storage position,
The mirror 30 inside the protection cover 20A is
a is pushed into contact with the lower end of the protective cover 20A.
Is housed in the gap with the bottom surface.

When the fingerprint authentication mode switching is set, as shown in FIGS. 11B and 12B, the protective cover 20 is opened and switched to the fingerprint photographing position, and the focal length is set to the close photographing state (P2). ), And the imaging window 14
Is illuminated by the irradiation light R from the light source 18 reflected by the mirror 30,
The imaging device 1 is connected via the mirror 30 and the imaging lens 15.
6 is imaged.

The structure and operation of the electronic circuit of the portable terminal device according to the fifth embodiment are described in FIGS.
This is substantially the same as the case of the mobile terminal device according to the first embodiment, and the description thereof is omitted.

Therefore, according to the imaging function of the portable terminal device of the fifth embodiment having the above configuration, the key input unit 11
The key input unit 11 covered by the protective cover 20A of FIG.
An image pickup unit incorporating the image pickup lens 15, the focus position moving device 17 and the image pickup device 16 is provided at the lower end of the image pickup device a, an image pickup window 14 is provided on the front surface 10 a of the protective cover 20 A, and a protective cover facing the image pickup lens 15. 20
A mirror 30 supported by support springs 30a and 30b for refracting the imaging axis Q from the imaging lens 15 in the direction of the imaging window 14 is provided on the bottom surface of the mirror A. When the protective cover 20A is closed, the mirror 30 is keyed. When set to switch to the fingerprint imaging position in which the key input unit 11a is opened by sliding the protective cover 20A by being pushed in by the lower end of the unit 11a and being housed in the gap with the bottom surface of the protective cover 20A, the close-up imaging state (P2) As the protective cover 20A
The fingerprint surface of the finger F pressed against the front imaging window 14 is
Since the light source 18 is illuminated by the irradiation light Q via the mirror 30 and is picked up by the image pickup element 16 inside the lower end of the key input unit 11a, it is possible to obtain a good fingerprint image with a small device configuration. .

Note that, instead of the support springs 30a and 30b, a mirror mechanism may be arranged at a predetermined position by using a link mechanism interlocked with the movement of the protective cover 20A.

Further, in each of the above embodiments, the imaging window (transparent plate) 14, which is a surface for reading the fingerprint image by pressing the fingerprint surface of the finger F, has a flat surface as shown in FIG. 14, for example. For example, as shown in FIG. 13, an imaging window (transparent plate) 1 having both front and back surfaces formed as concave curved surfaces as shown in FIG.
By using 4a to match the fingerprint surface shape of the finger F which is a convex curved surface and by making the focal length pseudo-over the entire surface, a good fingerprint image can be taken over a wide range of the fingerprint surface. It may be configured.

FIG. 13 is a view showing a fingerprint imaging optical system when the imaging window 14a having a concave front and back surface is used in the portable terminal device.

FIG. 14 is a view showing a fingerprint imaging optical system when the imaging window 14 having a front and back plane shape is used in the portable terminal device.

[0083]

As described above, according to the information terminal device according to the present invention, even if the imaging unit includes one imaging device and a lens system, the imaging device and the lens system in the imaging unit can be connected to each other. The focal length can be switched to the focal length according to the switching between the normal shooting mode and the fingerprint shooting mode by the focal length switching means for switching the focal length by changing the interval. Photographing and fingerprint image photographing can be performed.

Therefore, it is not necessary to arrange a plurality of different optical systems for normal photographing and fingerprint photographing, and it is possible to provide an information terminal device having an image pickup function capable of realizing a configuration suitable for miniaturization.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a portable terminal device according to a first embodiment of the information terminal device of the present invention, wherein FIG. 1 (A) is a front perspective view showing its external configuration, and FIG. FIG. 3 is a partial cross-sectional view illustrating a configuration of an imaging unit.

FIG. 2 is a block diagram showing a configuration of an electronic circuit of the portable terminal device.

FIG. 3 is a flowchart showing an overall process of the portable terminal device.

FIG. 4 is a flowchart showing a fingerprint collation process accompanying the comprehensive process of the portable terminal device.

FIG. 5 is a diagram showing an external configuration of a portable terminal device according to a second embodiment of the information terminal device of the present invention, and FIG. 5A is a front perspective view showing the external configuration when the fingerprint authentication mode switching is set. FIG. 2B is a front perspective view showing the external configuration when the camera mode switching is set.

FIG. 6 is a partial cross-sectional view illustrating a configuration of an imaging unit of the mobile terminal device according to the second embodiment, and FIG. 6A is a diagram illustrating a fingerprint imaging state when a fingerprint authentication mode is switched;
FIG. 2B is a diagram showing a normal shooting state when camera mode switching is set.

FIG. 7 is a diagram showing an external configuration of a portable terminal device according to a third embodiment of the information terminal device of the present invention, and FIG. 7A is a front perspective view showing the external configuration when the fingerprint authentication mode switching is set. FIG. 2B is a front perspective view showing the external configuration when the camera mode switching is set.

FIG. 8 is a partial cross-sectional view illustrating a configuration of an imaging unit of the portable terminal device according to the third embodiment, and FIG. 8A illustrates a fingerprint imaging state when a fingerprint authentication mode is switched;
FIG. 2B is a diagram showing a normal shooting state when camera mode switching is set.

FIG. 9 is a diagram showing an external configuration of a portable terminal device according to a fourth embodiment of the information terminal device of the present invention, and FIG. 9A is a front perspective view showing the external configuration when the camera mode switching is set; FIG. 2B is a front perspective view showing an external configuration when the fingerprint authentication mode switching is set.

FIG. 10 is a partial cross-sectional view illustrating a configuration of an imaging unit of the portable terminal device according to the fourth embodiment, and FIG. 10A illustrates a normal imaging state when camera mode switching is set;
FIG. 2B is a diagram showing a fingerprint photographing state when the fingerprint authentication mode switching is set.

FIG. 11 is a diagram showing an external configuration of a portable terminal device according to a fifth embodiment of the information terminal device of the present invention, and FIG. 11 (A) is a front perspective view showing the external configuration when the device is not used; FIG. 2B is a front perspective view showing an external configuration when the fingerprint authentication mode switching is set.

FIG. 12 is a partial cross-sectional view showing a configuration of an imaging unit of the portable terminal device according to the fifth embodiment, and FIG. 12A shows a state where the imaging unit is stored when unused, and FIG. () Is a diagram showing a fingerprint photographing state when the fingerprint authentication mode switching is set.

FIG. 13 is a diagram showing a fingerprint imaging optical system when an imaging window having a concave front and back surface is used in the portable terminal device.

FIG. 14 is a diagram showing a fingerprint imaging optical system when the imaging window 14 having a front and back planar shape is used in the portable terminal device.

[Explanation of symbols]

10, 10A, 10B, 10C, 10D: Portable terminal device main body 10a: Main body front surface 10b: Main body upper surface portion 10c: Main body lower surface portion 11, 11a: Key input unit 12: Liquid crystal display unit 13: Antenna 14: Imaging window (flat type) 14a ... Imaging window (concave curved surface type) 15 ... Imaging lens 16 ... Imaging element 17 ... Focus position moving device 18 ... Light source 19 ... Half mirror 20, 20A ... Protective cover 21 ... Control unit (CPU) 22 ... Storage device 22a ... System program 22b Communication control program 22c Fingerprint collation program 22d Registered fingerprint image data 22e Registered telephone number data 23 Key unit 24 Communication unit 25, 25A, 25B Imaging unit 26 RAM 26a Mode data memory 26b Image capturing position data memory 26c: verification fingerprint image Memory 26 d ... telephone directory data memory 26e ... work memory 27 ... display unit 30 ... mirror 30a, 30b ... support spring F ... finger Q ... imaging axis R ... irradiation light P1 ... camera mode position P2 ... fingerprint authentication mode position

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04M 1/00 H04M 1/21 Z 5K067 1/21 H04N 5/238 Z H04N 5/238 H04B 7/26 109S F-term (reference) 5B019 BA10 DA10 JA10 5B047 AA25 BC05 CA17 CB16 5C022 AA12 AB15 AB21 AB44 AC31 AC51 AC54 AC74 AC77 5K023 AA07 MM25 PP16 5K027 AA11 BB09 HH23 HH29 5K067 AA32 BB04 EE02 KK17

Claims (6)

[Claims] An imaging unit including one imaging element and a lens system; a focal length switching unit that changes a distance between the imaging element and the lens system in the imaging unit to switch a focal length; An information terminal device, comprising: control means for switching the focal length of the imaging unit by the focal length switching means in accordance with switching to a fingerprint photographing mode. 2. An image pickup window provided on a side surface of an apparatus main body, an image pickup lens provided corresponding to the image pickup window, an image pickup device provided inside the main body on an image pickup axis of the image pickup lens, A focal length moving mechanism that changes the focal length by moving the imaging device on the imaging axis, a light source provided inside the main body, and irradiating light from the imaging lens to the outside of the main body through the imaging window, In the normal photographing mode, the focal length is set to an infinite position by the focal length moving mechanism, and in the fingerprint photographing mode,
Control means for setting a focal length to a close position by the focal length moving mechanism and lighting and driving the light source. 3. An image pickup unit rotatably provided in a part of the apparatus main body, and provided on one side of the image pickup unit facing inward and outward directions of the apparatus main body as the image pickup unit rotates. An image pickup lens, an image pickup element disposed inside an image pickup unit on an image pickup axis of the image pickup lens, a focal length moving mechanism for moving the image pickup element on the image pickup axis to change a focal length, and the image pickup unit An imaging window provided on a side surface of the apparatus main body, which is located on the extension of the imaging axis, with one side provided with the imaging lens facing the inside of the apparatus main body; and the imaging window provided inside the main body. A light source for irradiating light toward the outside of the main body through the main body; and in a normal photographing mode in which one side provided with the imaging lens is rotated outwardly in the normal photographing mode, the focal length moving device. The focal length is set to an infinite position by a frame, and in a fingerprint photographing mode in which the imaging unit is rotated and one side provided with the imaging lens faces inward of the apparatus body, the focal length is moved by the focal length moving mechanism. An information terminal device comprising: a control unit that sets the light source to a close position and drives the light source to light up. 4. A slide cover attached to cover one end of the apparatus main body, expose a part of the apparatus main body when the slide is opened, and protect a part of the apparatus main body when the slide is closed, An imaging lens provided on one end side surface of the main body; an imaging element provided inside the main body on an imaging axis of the imaging lens; and a focal length for moving the imaging element on the imaging axis to change a focal length. A moving mechanism, an imaging window provided on a side surface of a slide cover on an extension of an imaging axis from an imaging lens on one side surface of the device main body, and an imaging window of the slide cover provided on one side surface of the device main body. A light source for irradiating light outward of the slide cover through the slide cover; and in a normal photographing mode in which the slide cover is slid and closed, the focal length moving mechanism. Control means for setting the focal length to an infinite position, and in the fingerprint photographing mode in which the slide cover is slid open, setting the focal length to a close position by the focal length moving mechanism and lighting and driving the light source. An information terminal device comprising: 5. The imaging device according to claim 1, wherein the front and back surfaces of the imaging window are formed as concave curved surfaces corresponding to the convex curved surface of the fingerprint surface of the finger. Information terminal device. 6. A fingerprint request judging means for judging the presence or absence of a request for fingerprint photographing, and a control in a fingerprint photographing mode by said control means when the fingerprint request judging means judges that there is a request for fingerprint photographing. A notification means for issuing a warning if no response has been made;
The information terminal device according to any one of claims 1 to 4, further comprising: