JP2008143220A - Individual authentication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle authentication system capable of securing the crime preventive performance of a vehicle and imparting an added value to door glass. <P>SOLUTION: This individual authentication system 13 comprises a display device 31, an input device 32 and an authentication control device 33. The display device 31 comprises a transmitting type screen 42 provided at a side face on the cabin inner side of the door glass 41; a projector 43 projecting an input screen for inputting the identification information of a user, on the screen 42 from the inside of a cabin; and a display control device 44 for controlling the projector 43 to project the input screen on the screen 42. The input device 32 comprises an infrared CCD camera 62 photographing the input operation of a user to the input screen from the inside of the cabin; and an input control device 63 acquiring identification information of the user based on image information acquired through the camera. The authentication control device 33 authenticates a user's identity when determining that the identification information acquired by the input device is appropriate. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a personal authentication system for a vehicle that authenticates a user when entering the vehicle.

  2. Description of the Related Art Conventionally, a vehicle personal authentication system that authenticates the identity of a person based on a user's biological characteristics has been proposed. This system captures the entire user's face and iris of the user who got into the vehicle with a camera, and extracts information for identifying the driver such as facial feature data and pupil iris data by image analysis processing. The extracted information is compared with information registered in advance. Then, the driver is authenticated as a registered person by determining whether or not the similarity between the two is equal to or higher than a threshold value that is a reference for authenticating the person. In recent years, as disclosed in Patent Document 1, for example, such a system is being applied to a vehicle antitheft system that prevents the vehicle from being stolen. In this case, the engine is allowed to start only when the driver is authenticated as the person himself / herself. Thus, the crime prevention performance of the vehicle is ensured by allowing the vehicle to be driven only to those who are permitted to drive the vehicle in advance.

Further, for example, Patent Document 2 discloses a vehicle antitheft system that uses an electronic key system as primary authentication and a face authentication system as secondary authentication. The electronic key system permits the door to be unlocked or unlocked through mutual wireless communication between the electronic key and the vehicle when the user approaches the vehicle with the electronic key. The face authentication system captures a face image of a user who has entered the vehicle with a camera, and permits the engine to start based on a result of collation between the face image and a previously registered face image. In this way, the security performance of the vehicle is enhanced by performing user authentication both during and after boarding.
JP 2000-168502 A JP 2005-67353 A

  However, although the anti-theft system as described above has been installed in vehicles, in recent years, the number of organized or planned vehicle theft cases has been increasing year by year. Is also diversifying. For example, in the anti-theft system disclosed in Patent Document 2, it is impossible to determine whether the person holding the electronic key is an authorized user or a third party on the vehicle side. For this reason, as long as the electronic key is possessed, a third party can get into the vehicle. From such an actual situation, there is a strong demand for further enhancement of the crime prevention performance of the vehicle, particularly when riding.

  On the other hand, in recent years, there is still a tendency for vehicles to be multifunctional and highly functional. In so-called luxury cars, there is a demand for such multi-functionality or high functionality. The door glass is no exception, and various functions are added to obtain convenience, such as a power window device that opens and closes the door glass by the driving force of the motor. However, the door glass still plays the original role of securing the field of view necessary for driving, protecting the driver from wind and rain, flying objects, etc., and keeping the environment in the vehicle comfortable. For this reason, it has been desired to add some added value to the door glass from the viewpoint of the above-described multifunctional or high-functionality of the vehicle.

  Therefore, the applicant of the present application uses door glass in order to mutually satisfy the demand for enhancing the crime prevention performance of the vehicle (especially the crime prevention performance when riding) and the demand for multifunctional or high functionality of the door glass. I came up with some kind of crime prevention measures. However, how to use the door glass to take measures against vehicle theft has not been specified.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vehicle authentication system that can secure crime prevention performance of a vehicle and can add added value to a door glass. is there.

  The invention described in claim 1 is a personal authentication system for a vehicle that confirms the identity of the user when the user gets on the vehicle, and includes a transmissive screen provided on a door glass, and a user on the screen. A display device comprising: a projection means for projecting an input screen for inputting the identification information from the vehicle interior side; a display control means for controlling the projection means to project the input screen onto the screen; and a user input to the input screen An input device comprising: an imaging unit that acquires the input operation as image information by imaging the operation from the vehicle interior side; and an input control unit that acquires user identification information based on the image information acquired through the imaging unit; The validity of the user identification information acquired by the input control means is judged, and if it is judged valid, the identity of the user is authenticated. An authentication control unit that, as its gist in that it comprises an.

  According to the present invention, when the user gets on the vehicle, the transmission screen provided on the door glass has an input screen for inputting user identification information through the projection means controlled by the display control means from the vehicle interior side. Projected. The user's input operation to the input screen is taken from the vehicle interior side by the photographing means and acquired as image information. Based on the image information acquired through the photographing unit, the input control unit acquires user identification information. Then, the authentication control apparatus determines the validity of the user identification information acquired by the input control means, and authenticates the identity of the user if it is determined to be appropriate. Thus, when a user of a vehicle gets on the vehicle, added value is created by using the door glass as a display. In addition, when the user gets on the vehicle, authentication of the identity is performed, so that the crime prevention performance of the vehicle is suitably ensured.

  According to a second aspect of the present invention, in the personal authentication system according to the first aspect, the display control means displays an input screen for inputting a plurality of types of identification information corresponding to a plurality of types of authentication methods on a screen. The projecting unit is controlled, the input control unit acquires a plurality of types of identification information corresponding to a plurality of types of authentication methods based on the image information acquired through the photographing unit, and the authentication control device is acquired by the input control unit. The gist is to authenticate the identity of the user when it is determined that all of the plurality of types of identification information are valid.

  According to the present invention, the authentication accuracy of the user's identity can be improved by combining a plurality of types of authentication. In addition, by providing the door glass with a screen, it is possible to suitably secure a display place for a plurality of types of input screens corresponding to a plurality of types of authentication methods.

  According to a third aspect of the present invention, in the personal authentication system according to the second aspect, the input screen is a first input screen for inputting a personal identification number registered in advance in an authentication control device as the identification information, and the The gist of the present invention is that it includes a second input screen for inputting user biometric information registered in advance in the authentication control apparatus as identification information.

According to the present invention, the authentication accuracy of the user's identity can be improved by combining the password authentication and the biometric authentication.
According to a fourth aspect of the present invention, in the personal authentication system according to the second aspect, the input screen is configured to input a first biometric information of a user registered in advance in an authentication control device as the identification information. The gist of the invention is that it includes an input screen and a second input screen for inputting second biometric information of the user registered in advance in the authentication control device as the identification information.

  According to the present invention, by performing a combination of a plurality of types of biometric authentication, the authentication accuracy of the user's identity can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, while ensuring the crime prevention performance of a vehicle, added value can be provided to a door glass.

Hereinafter, an embodiment in which the present invention is embodied in a vehicle antitheft system will be described with reference to FIG.
As shown in FIG. 1, the anti-theft system 11 mounted on the vehicle 10 includes an electronic key system 12 and a personal authentication system 13. The electronic key system 12 confirms the identity of the user through wireless communication when the user gets into the vehicle 10. Similarly, the personal authentication system 13 confirms the identity of the user based on the identification information input by the user. The antitheft system 11 unlocks the door lock of the vehicle 10 only when both the first authentication by the electronic key system 12 and the second authentication by the personal authentication system are established.

<Electronic key system>
First, the electronic key system 12 will be described. As shown in FIG. 1, the electronic key system 12 is mounted on the electronic key 21 possessed by the user and the vehicle 10 and verifies the validity of the electronic key 21 through wireless communication with the electronic key 21. A control device 22 is provided. A transmitter 23 and a receiver 24 for performing mutual wireless communication with the electronic key 21 unique to the vehicle 10 are connected to the verification control device 22. The transmitter 23 includes a transmission antenna 23a, and the receiver 24 includes a reception antenna 24a. The collation control device 22 includes a door control device 26 that controls the door lock motor 25 to lock and unlock the door lock (not shown), a power control device 27 that manages the power supply of the on-vehicle electrical components, and ignition of the engine 28. An engine control device 29 that performs control and fuel injection control and an authentication control device 33 that will be described later that authenticates the identity of the user are connected through a bus 30. Each control device can exchange information with each other through the bus 30.

  The collation control device 22 performs mutual wireless communication with the electronic key 21 through the transmission antenna 23a and the reception antenna 24a, and determines the validity of the electronic key 21 outside or inside the vehicle through the communication. That is, the verification control device 22 generates an outdoor verification response request signal Sreq that requests a response from the electronic key 21, and transmits the signal to the outside of the vehicle through the transmission antenna 23a at a predetermined control period. Thereby, a detection area (not shown) of the electronic key 21 is formed around the door of the vehicle 10. When the user holds the electronic key 21 and approaches the locked vehicle and enters the detection area, the electronic key 21 receives the response request signal Sreq and returns a response signal Srep including a predetermined identification code. To do. When the returned response signal Srep is received through the receiving antenna 24a, the collation control device 22 determines the validity of the predetermined identification code included in the received response signal Srep, and determines that it is appropriate. The unlock request signal is output to the door control device 26 on condition that the identity of the user is authenticated by the personal authentication system 13 described later. The door control device 26 unlocks the door lock by receiving the unlock request signal from the verification control device 22 and driving the door lock motor 25. When the verification control device 22 determines that the predetermined identification code included in the received response signal Srep is valid, the verification control device 22 sends the determination result to the input control device 63 through the authentication control device 33 described later. The validity of the identification code is determined by whether or not the identification code matches the identification code registered in the vehicle (more precisely, the verification control device 22).

  After unlocking the door lock, when the user holding the electronic key 21 gets into the vehicle, the collation control device 22 detects this by a door sensor (not shown), and for vehicle interior communication (not shown) provided in the vehicle 10. A detection area for the electronic key 21 is formed in the passenger compartment by transmitting a response request signal Sreq for indoor verification through the transmitter. The electronic key 21 receives the response request signal Sreq and returns a response signal Srep including an identification code. When the response signal Srep is received through the receiving antenna 24a, the collation control device 22 determines the validity of the identification code included in the response signal Srep. to approve. When the start switch (not shown) disposed in the vicinity of the driver's seat in the passenger compartment is operated by the user in a state where the start of the engine 28 is permitted, the power supply control device 27 sends an engine start signal to the engine control device 29. Output. The engine control device 29 receives the engine start signal from the power supply control device 27 and starts the engine 28.

  When the user stops the engine 28 through the operation of the start switch and goes out of the passenger compartment, the collation control device 22 determines again the validity of the electronic key 21 outside the passenger compartment and determines that it is appropriate. When this occurs, the verification control device 22 outputs a lock request signal to the door control device 26. The door control device 26 locks the door lock by driving the door lock motor 25 in response to the lock request signal from the verification control device 22.

<Personal authentication system>
Next, the personal authentication system 13 will be described. As shown in FIG. 1, the personal authentication system 13 includes a display device 31, an input device 32, and an authentication control device 33. The display device 31 displays an input screen for inputting user identification information on the door glass. The input device 32 acquires user identification information input through the input screen displayed on the door glass by the display device 31. The authentication control device 33 determines the validity of the user identification information acquired by the input device 32, and authenticates the identity of the user if it is determined to be appropriate.

<Display device>
The display device 31 includes a transmissive screen 42 provided on the door glass 41 on the driver's seat, a projector 43 as a projection unit that projects an input screen for inputting user identification information on the screen 42 from the vehicle interior side, and A display control device 44 that controls the projector 43 to project the input screen onto the screen 42 is provided. Note that a transmissive screen projects an image from a light source such as a projector from the back of the screen (side of the vehicle interior) and forms an image on the screen, and the image is the front of the screen (side of the vehicle interior). This is the type that you observe.

  The screen 42 employs a light control film whose transparency changes between transparent, translucent and opaque through control of an applied voltage. As shown in FIG. 2A, the light control film is formed in a rectangular shape that can be accommodated in the door glass 41, and is pasted over a region about half of the rear side of the vehicle 10 on the side surface of the door glass 41 on the vehicle interior side. It has been.

  Here, the configuration of the screen 42 will be described. As shown in FIG. 3, the screen 42 includes a liquid crystal sheet 51 whose transparency can be adjusted according to an applied voltage, and two sheet-like transparent electrodes 52 provided on two outer surfaces of the liquid crystal sheet 51, 52 and two transparent films 53 and 53 further provided on the outer surface of the transparent electrodes 52 and 52.

  As shown in FIG. 4A, the liquid crystal sheet 51 is formed by dispersing nematic liquid crystal droplets having a property that molecules are oriented in a certain direction in a transparent polymer film. As shown in the figure, in the state where no voltage is applied, the liquid crystals shown as rod-like molecules are aligned along the interface with the polymer. In this state, the light incident on the liquid crystal sheet 51 is refracted at the interface with the polymer and inside due to the difference in refractive index between the polymer and the liquid crystal and the birefringence of the liquid crystal. As a result, the light cannot travel straight and is scattered, and the screen 42 becomes opaque. As shown in FIG. 4B, when a voltage is applied, the liquid crystal molecules try to line up parallel to the direction in which the voltage is applied. For this reason, the state becomes equal to the absence of an interface with the polymer, and light travels straight without being scattered. As a result, the screen 42 becomes transparent. Further, when a voltage having a value that is, for example, half of the voltage at which the film becomes transparent is applied, the liquid crystals are arranged according to the voltage value. That is, the liquid crystal is in an intermediate arrangement state between when it becomes transparent and when it becomes opaque. As a result, the screen 42 becomes translucent.

  The transparent electrode 52 is made of, for example, indium tin oxide (ITO). As shown in FIG. 3, the two transparent electrodes 52 and 52 are connected to the display control device 44. When a voltage is applied to the liquid crystal sheet 51 through the two transparent electrodes 52, 52 by the display control device 44, the transparency of the liquid crystal sheet 51 varies between transparent, translucent and opaque according to the value of the voltage. Change. That is, when a voltage set to make the liquid crystal sheet 51 transparent is applied between the two transparent electrodes 52, 52, the liquid crystal molecules are aligned in parallel with the voltage application direction, thereby transmitting the parallel light transmittance. The liquid crystal sheet 51 becomes transparent. When a voltage is not applied to the liquid crystal sheet 51, the liquid crystal molecules become uneven, thereby reducing the transmittance of parallel rays, and the liquid crystal sheet 51 becomes opaque. Further, when a voltage set to make the liquid crystal sheet 51 translucent is applied between the two transparent electrodes 52, 52, the transmittance of the parallel rays of the liquid crystal sheet 51 becomes opaque when it becomes transparent. The liquid crystal sheet 51 becomes translucent. In the present embodiment, when the liquid crystal sheet 51 is translucent, the screen 42 functions as a transmissive screen. The image projected from the projector 43 is preferably displayed on the screen 42, and the user can preferably observe the image from outside the passenger compartment.

  As shown in FIG. 2A, the projector 43 and the display control device 44 are disposed inside the door 46 in a state of being housed in the single package 31a. The projector 43 projects and displays the input screen S1 and the guidance screen S2 shown in FIG. 2B on the screen 42 based on the input screen information and the guidance screen information acquired through the display control device 44. The projection area Ap of the projector 43, the projection direction, the focal length of a projection lens (not shown), and the like are set so that the image projected by the projector 43 corresponds to the screen 42. Further, the projector 43 is provided so that the projection area Ap is a rectangle having substantially the same area as the screen 42. As the light source of the projector 43, either a visible light source or an invisible light source can be employed.

  As shown in FIG. 2B, the input screen S <b> 1 is displayed on the lower part of the door glass 41 and the guidance screen S <b> 2 is displayed on the upper part of the door glass 41. The input screen S1 includes a numeric keypad screen S1a for inputting a numeric keypad and a palm shape input screen S1b for inputting a palm shape. The numeric keypad screen S1a and the palm-shaped input screen S1b are displayed side by side in the front-rear direction of the vehicle (the left-right direction in FIG. 2B). The numeric keypad screen S1a includes ten numbers from “0” to “9”, operation symbols such as “+” and “−”, and a plurality of types such as “enter” used when determining the input. A keyboard area is arranged in a grid pattern vertically and horizontally. The palm-shaped input screen S1b is provided with a hand-shaped hand pattern that clearly indicates a position where the hand is held (input position). On the guidance screen S2, a message for prompting the user to enter a numeric keypad and a palm-shape and notifying the operation procedure (for example, “Enter your PIN and hold your hand over the input position”) is displayed. .

  The display control device 44 is connected to the authentication control device 33 through the bus 30. The display control device 44 can exchange information with the authentication control device 33 through the bus 30. The display control device 44 includes a storage device 44a such as an EEPROM, and the storage device 44a includes input screen information used when a user inputs an input screen for inputting identification information and display of the input screen. Stored is video content such as guidance information used when displaying a guidance screen that guides the user to input procedures and the like by characters. The storage device 44a stores various control programs such as a display control program for controlling the projector 43 and a light control program for performing light control of the screen 42 (light control film).

  When the display control device 44 controls the projector 43 to project the input screen S1 and the guidance screen S2 on the screen 42, the voltage set to make the screen 42 translucent is transmitted through the two transparent electrodes 52, 52 to the liquid crystal sheet. 51 is applied. As a result, the projection light projected from the projector 43 passes through the liquid crystal sheet 51 and passes through the exit surface opposite to the incident surface on which the projection light of the liquid crystal sheet 51 is incident, whereby the input screen S1 and the guide screen S2 are displayed. It will be displayed favorably. Then, the user can observe the image displayed on the screen 42 from outside the passenger compartment of the screen 42.

<Input device>
The input device 32 includes an infrared light emitting diode 61, an infrared CCD camera 62, and an input control device 63. As shown in FIG. 2A, the infrared light emitting diode 61, the infrared CCD camera 62, and the input control device 63 are disposed inside the door 46 in a state of being housed in the single package 32a. The infrared light emitting diode 61 irradiates the irradiation region set over almost the entire door glass 41 with infrared rays from the vehicle interior side. The imaging region of the infrared CCD camera 62 is set over almost the entire door glass 41. The infrared CCD camera 62 captures the input operation as image information by photographing the user's input operation on the input screen S1 displayed on the door glass 41 by the display device 31 from the vehicle interior side. Precisely, the infrared CCD camera 62 receives infrared rays reflected by a part of the user's body used for the input operation on the input screen S1, and acquires the input operation as image information based on the received light signal. To do.

The input control device 63 acquires user identification information based on image information acquired through the infrared CCD camera 62.
When the determination result indicating that the validity of the electronic key 21 has been determined is not sent through the authentication control device 33, the input control device 63 keeps the infrared light emitting diode 61 in the extinguished state and the infrared CCD camera 62. Hold in a stopped state. When the determination result indicating that the validity of the electronic key 21 has been determined is sent through the authentication control device 33, the input control device 63 turns on the infrared light emitting diode 61 and activates the infrared CCD camera 62. . In this state, when the preliminary operation by the user such as holding the hand over the door glass 41 or approaching the face is acquired as image information by the infrared CCD camera 62 in this state, the input control device 63 performs the operation on the screen 42 through the authentication control device 33. A display request signal for requesting projection of the input screen S1 and the guidance screen S2 is sent to the display control device 44. Upon receiving the signal, the display control device 44 applies a voltage set to make the screen 42 translucent to the liquid crystal sheet 51 through the two transparent electrodes 52 and 52, and inputs the input screen to the translucent screen 42. The projector 43 is controlled to project S1 and the guidance screen S2.

  When the user performs a numeric keypad input operation through the numeric keypad screen S1a, the input control device 63 uses the numeric keypad based on, for example, the degree of reflection of infrared rays by the finger used for the input, that is, the degree of shading of the photographed finger image. The finger position (input position) on the screen S1a is recognized. More specifically, since the infrared CCD camera 62 captures infrared light reflected by a finger or the like, the finger image captured by the infrared CCD camera 62 becomes clearer as the finger approaches the numeric keypad screen S1a. By using this, the input control device 63 performs an input to a predetermined input portion on the numeric keypad screen S1a when the degree of lightness and darkness of a finger image taken by the infrared CCD camera 62 exceeds a predetermined lightness and darkness threshold value. The input to the keyboard corresponding to the input position on the numeric keypad screen S1a is confirmed. Thereafter, the input control device 63 acquires personal identification number information set in advance as user identification information based on an input operation repeated in the same manner. When the input control device 63 confirms the input to the keyboard corresponding to “enter”, the input control device 63 determines that the input of the personal identification number by the user has been completed, and the information that has been confirmed so far is displayed as a single personal identification number. To the authentication control device 33.

  When the user performs a palm-shaped input operation through the palm-shaped input screen S1b, the input control device 63 reflects the degree of reflection of infrared rays by the palm used for the input, that is, the degree of shading of the captured palm image. Based on the above, the input operation to the palm-shaped input screen S1b is recognized. Similarly to the above, the input control device 63 determines that the input to the palm-shaped input screen S1b has been performed when the shade degree of the palm image photographed by the infrared CCD camera 62 exceeds a predetermined shade threshold, The input to the input position on the palm-shaped input screen S1b is confirmed. Then, the input control device 63, based on the palm image taken by the infrared CCD camera 62 at this time, through a predetermined image analysis process, the palm geometric feature information, that is, the palm size (finger length). , The palm width and the surface area of the four fingers, etc.) and the biometric information (palm shape information) such as the shape are extracted as user identification information, and the extracted biometric information is sent to the authentication control device 33.

<Authentication control device>
The authentication control device 33 comprehensively controls the display device 31 and the input device 32. The authentication control device 33 includes a storage device 33a such as an EEPROM, and user identification information is stored in the storage device 33a. In the present embodiment, a personal identification number and palm shape information which is biometric information are stored as user identification information. The storage device 33a stores an authentication control program for determining the validity of the user identification information acquired by the input device 32. Then, the authentication control device 33 determines the validity of the user identification information acquired by the input device 32 according to the authentication control program, and authenticates the identity of the user when it is determined to be appropriate.

  More specifically, the authentication control device 33 collates the password sent from the input control device 63 with the password stored in the storage device 33a, and if they match, the password from the input control device 63 is Judge that it is appropriate. Further, the authentication control device 33 collates the biometric information (palm shape information) sent from the input control device 63 with the biometric information stored in the storage device 33a. Then, it is determined whether or not the similarity between the two pieces of information is equal to or greater than an acceptance threshold value that is a reference for authenticating the user's identity. Judge that it is appropriate. When the authentication control device 33 determines that both the password number and the biometric information sent from the input control device 63 are valid, the authentication control device 33 authenticates the user as a registered person and The authentication result is sent to the verification control device 22.

  Further, when a determination result indicating that the electronic key 21 is valid is sent from the verification control device 22, the authentication control device 33 performs input control of the determination result as proximity detection information to the user's vehicle 10. Send to device 63.

<Operation of the embodiment>
Next, an outline of the operation of the antitheft system configured as described above when unlocked will be described with reference to the flowchart shown in FIG.

  In the standby state of the vehicle in which all the doors are closed and locked while the engine is stopped, the anti-theft system 11 first determines whether or not the authentication of the electronic key 21 is established through the electronic key system 12 ( Step S101). If the anti-theft system 11 determines that the authentication of the electronic key 21 is not established (NO in step S101), the process ends. If it is determined that the authentication is established (YES in step 101), the process proceeds to step 102. Migrate processing.

  In step 102, the anti-theft system 11 determines whether authentication of the user's identity has been established through the personal authentication system 13 (step S102). If the anti-theft system 11 determines that the authentication of the user's identity is not established (NO in step S102), the process ends. If the anti-theft system 11 determines that the authentication is established (YES in step 102), the process proceeds to step 103. Transfer processing to.

  In step 103, the antitheft system 11 unlocks the door lock through the electronic key system 12. As described above, the anti-theft system 11 includes both the authentication of the validity of the electronic key 21 by the electronic key system 12 (first authentication) and the authentication of the user's identity (second authentication) by the personal authentication system 13. Only when it is established, the door lock of the vehicle 10 is unlocked. Therefore, the crime prevention performance of the vehicle 10 is suitably ensured. In the flowchart shown in FIG. 5, the electronic key 21 authentication process executed when the process proceeds to step S101 and the user personal authentication process performed when the process proceeds to step S102. This will be described in detail later.

<Authentication processing of electronic key>
Next, in the flowchart shown in FIG. 5, the authentication process of the electronic key 21 that is executed when the process proceeds to step S101 will be described in detail.

  In the above-described standby state of the vehicle 10, the verification control device 22 forms a detection area for the electronic key 21 around the door of the vehicle by transmitting a response request signal Sreq through the transmission antenna 23a. When the user has the electronic key 21 and enters the detection area formed around the door of the vehicle, the electronic key 21 receives the response request signal Sreq and returns a response signal Srep including a predetermined identification code. .

  When receiving the response signal Srep through the receiving antenna 24a, the verification control device 22 determines the validity of the predetermined identification code included in the response signal Srep. When the verification control device 22 determines that the identification code is not valid, the verification control device 22 determines that the electronic key 21 is not valid and ends the process. If the verification control device 22 determines that the identification code is valid, the verification control device 22 determines that the identification key is a legitimate electronic key 21 and sends the determination result to the authentication control device 33.

  The authentication control device 33 sends the determination result from the verification control device 22 to the input control device 63 as proximity detection information indicating that the user is approaching the vehicle 10. As described above, in order to authenticate the validity of the electronic key 21, the user who has the electronic key 21 needs to approach the vehicle 10 and enter the detection area described above. It can be said that the user is approaching the vehicle 10 when the mutual wireless communication with the vehicle 10 is established, and as a result, the validity of the electronic key 21 is authenticated.

  In addition, after the validity of the electronic key 21 is confirmed, the verification control device 22 enters an unlocking standby state waiting for input of an authentication result of the user's identity by the personal authentication system 13 described below. The verification control device 22 receives the authentication result indicating that the personal authentication of the user is established by the personal authentication system 13 and unlocks the door lock through the door control device 26.

<User personal authentication processing>
Next, in the flowchart shown in FIG. 5, a user personal authentication process executed when the process proceeds to step S102 will be described in detail. In the standby state of the vehicle 10 described above, the infrared light emitting diode 61 is turned off and the infrared CCD camera 62 is kept stopped. Further, the display control device 44 holds a state in which a voltage set to make the screen 42 translucent is applied to the liquid crystal sheet 51 through the two transparent electrodes 52 and 52. Therefore, the screen 42 is held in a semi-transparent (white) state, and the user can take an image from the vehicle interior side with the infrared CCD camera 62.

  Now, in such a standby state of the vehicle 10 (step S201), the input control device 63 detects that the user is approaching the vehicle 10 by inputting proximity detection information of the user to the vehicle 10 through the authentication control device 33. (Step S202). Then, the input control device 63 turns on the infrared light emitting diode 61 and activates the infrared CCD camera 62 to start photographing (step S203).

  In this state, when a preliminary operation is performed by the user such as holding his hand over the door glass 41 or bringing his face close, the operation is acquired as image information by the infrared CCD camera 62. When the input control device 63 detects the preliminary operation of the user through the image information (step S204), the display control device 44 sends a display request signal for requesting the projection of the input screen S1 and the guidance screen S2 on the screen 42 through the authentication control device 33. Send to.

  The display control device 44 receives the display request signal sent through the authentication control device 33 and applies a voltage set to make the screen 42 translucent to the liquid crystal sheet 51 through the two transparent electrodes 52 and 52. The projector 43 is controlled to project the input screen S1 and the guidance screen S2 on the translucent screen 42. As a result, as shown in FIG. 2B, the input screen S1 (the numeric keypad screen S1a and the palm-shaped input screen S1b) and the guidance screen S2 are displayed on the screen 42 (step S205). At this time, since the input screen S1 and the guidance screen S2 appear to be raised on the transparent door glass 41, the user can be surprised and give a futuristic or novel impression. It becomes possible. In addition, a so-called eye catching effect that attracts the eyes of the user can be obtained.

  When the identification information is input through the input screen S 1 by the user, the input control device 63 acquires the user identification information based on the image information related to the input operation sent from the infrared CCD camera 62. The identification information is sent to the authentication control device 33 (step S206). That is, the input control device 63 obtains the input personal identification number and sends it to the authentication control device 33 based on the image information of the input operation for the user numeric keypad screen S1a sent from the infrared CCD camera 62. Further, the input control device 63 acquires biometric information (palm shape information) as user identification information based on the image information of the input operation on the user's palm shape input screen S1b sent from the infrared CCD camera 62, and is authenticated. Send to control device 33.

  Next, the authentication control device 33 determines the validity of the user identification information sent from the input control device 63 (S207). In other words, the authentication control device 33 collates the password sent from the input control device 63 with the password registered in advance in the storage device 33a, and if the collation matches, the entered password is valid. Judge that there is. Further, the authentication control device 33 collates the biometric information (palm shape information) sent from the input control device 63 with the biometric information registered in advance in the storage device 33a, and the similarity between the biometric information is determined. If it is greater than or equal to the acceptance threshold, it is determined that the input biological information is valid.

  If the authentication control device 33 determines that both the password number and the biometric information sent from the input control device 63 are valid (YES in S207), the authentication control device 33 authenticates the user as the registered person. . Then, the authentication control device 33 sends an authentication result indicating that the user's personal authentication has been established to the verification control device 22 (step S208). Further, the authentication control device 33 stops the photographing by the infrared CCD camera 62 and the display of the input screen S1 and the guidance screen S2 on the screen 42 (step S209).

  That is, the authentication control device 33 sends to the input control device 63 a shooting stop signal indicating that shooting is to be stopped, and sends a display stop signal indicating that display of the input screen S1 and the guidance screen S2 is stopped to the display control device 44. . The input control device 63 receives the photographing stop signal, turns off the infrared light emitting diode 61 and stops the infrared CCD camera 62. Further, the display control device 44 stops the projector 43 upon receiving the display stop signal and stops the application of voltage to the screen 42. Thereby, although the screen 42 is in an opaque (white) state, since the screen 42 is provided on the rear side of the vehicle 10 in the door glass 41, the view of the user on the door glass 41 side is secured.

  Note that, even when the personal authentication of the user is established, it is possible to continuously apply a voltage set to make the screen 42 translucent between the two transparent electrodes 52 and 52. In this way, the scenery outside the passenger compartment can be seen through the translucent screen 42, so that the visibility on the side of the vehicle of the user can be suitably secured. In addition, after the personal authentication of the user is established, a voltage set to make the screen 42 transparent can be applied between the two transparent electrodes 52 and 52. In this way, visibility on the side of the user's vehicle can be ensured more suitably.

  On the other hand, if the authentication control device 33 determines in step S207 that any one of the password number and the biometric information sent from the input control device 63 is not valid (NO in step S207), the user's identity. The personal authentication is performed again as a predetermined operation when the sex cannot be confirmed. That is, the authentication control device 33 counts the number of times it is determined that the user's personal authentication has not been established with a counter (not shown). Then, the authentication control apparatus 33 determines whether or not the number of times that it has been determined that personal authentication has not been established is less than a predetermined number N (twice in the present embodiment) (step S210). If it is determined that the predetermined number N has not been reached (NO in S210), a message prompting the user to re-enter identification information on the guidance screen S2 (for example, “Authentication failed. Please enter again. ]) Is sent to the display control device 44, and the process proceeds to step S206. Upon receiving the command, the display control device 44 controls the projector 43 so as to display the above-described message for prompting re-input on the guidance screen S2. On the other hand, if it is determined in step S210 that the predetermined number of times N has been reached (YES in step S210), the fact is notified to predetermined contacts such as the user and the security company through communication means (not shown). .

<Effect of Embodiment>
Therefore, according to the present embodiment, the following effects can be obtained.
(1) The vehicle personal authentication system 13 that confirms the identity of the user when the user gets on the vehicle 10 includes a display device 31, an input device 32, and an authentication control device 33. The display device 31 includes a transmissive screen 42 provided on a side surface of the door glass 41 on the vehicle interior side, a projector 43 that projects an input screen S1 for inputting user identification information on the screen 42 from the vehicle interior side, and a screen 42. And a display control device 44 for controlling the projector 43 to project the input screen S1. The input device 32 captures the input operation of the user with respect to the input screen S1 from the vehicle interior side to acquire the input operation as image information, and the user based on the image information acquired through the infrared CCD camera 62. And an input control device 63 for acquiring the identification information. The authentication control device 33 determines the validity of the user identification information acquired by the input device 32, and authenticates the identity of the user if it is determined to be appropriate.

  According to this configuration, when the user gets on the vehicle 10, the input screen S <b> 1 for inputting the user identification information is displayed on the door glass 41. Thus, added value is born by using the door glass 41 as a display. Moreover, when the user gets on the vehicle 10, the security performance of the vehicle 10 is suitably ensured by authenticating the identity.

  (2) The display control device 44 displays on the screen 42 a plurality of types of input screens S1 (tenkey screen S1a and palm shape input screen S1b) corresponding to a plurality of types of authentication methods (password authentication and palm-shaped authentication). The projector 43 is controlled. The input control device 63 acquires a plurality of types of identification information (password and palm shape information) corresponding to a plurality of types of authentication methods based on the image information acquired through the infrared CCD camera 62. And the authentication control apparatus 33 authenticates a user's identity, when it judges that all the several types of identification information acquired by the input control apparatus 63 is appropriate.

  According to this configuration, the authentication accuracy of the user's identity can be improved by combining a plurality of types of authentication. Further, since the screen 42 is provided on the door glass 41, even when a plurality of types of authentication methods are used in combination, a plurality of types of input screens corresponding to the authentication methods (the numeric keypad screen S1a and the palm-shaped input screen). The display location of S1b) can be suitably secured. In addition, since the area of each input screen can be sufficiently secured, it is possible to suitably ensure the convenience for the input operation of the identification information of the user.

  (3) The input screen S1 includes a password authentication numeric keypad screen S1a (first input screen) for performing authentication based on a password registered in advance in the authentication control device 33 as user identification information, and user identification information. As a palm-shaped input screen S1b (second input screen) for biometric authentication for performing authentication based on user biometric information registered in advance in the authentication control device 33.

According to this configuration, the authentication accuracy of the user's identity can be improved by combining the password authentication and the biometric authentication.
(4) The input control device 63 activates the infrared CCD camera 62 when the proximity of the user to the vehicle 10 is detected, and the preliminary operation performed by the user by the infrared CCD camera 62 as image information. If acquired, a display request signal indicating that the input screen S1 is to be projected onto the screen 42 is sent to the display control device 44. Then, the display control device 44 controls the projector 43 to project the input screen S1 on the screen 42 based on the display request signal sent from the input control device 63.

  According to this configuration, the input screen S1 is projected on the screen 42 only when the user approaches the vehicle 10 and performs a predetermined preliminary operation. For this reason, if the user just approaches the vehicle 10, the input screen S1 is not displayed on the screen 42, and the useless operation of the projector 43 is avoided.

  (5) The collation control device 22 constituting the electronic key system 12 was used as a detection means for detecting the proximity of the user to the vehicle 10. That is, the verification control device 22 confirms that the electronic key 21 is within a predetermined area defined around the door of the vehicle 10 through wireless communication with the electronic key 21 possessed to indicate the position of the user. It functions as a determination unit that makes a determination based on position information (response signal Srep) by the electronic key 21. Utilizing this fact, the input control device 63 indicates that the mutual wireless communication between the verification control device 22 and the electronic key 21 has been established, that is, the determination result that the electronic key 21 is valid. To detect the approach of the user to the vehicle 10.

  According to this configuration, the fact that the user who possesses the electronic key 21 approaches the vehicle 10 and enters the predetermined area around the door can be easily confirmed through wireless communication between the electronic key 21 and the verification control device 22. Can be detected.

  (6) The input device 32 includes an infrared light emitting diode 61 as an infrared irradiation means for irradiating infrared light from the vehicle interior side to a portion where the screen 42 of the door glass 41 is provided. An infrared CCD camera 62 is employed as a photographing means for photographing an input operation on the user input screen S1. The infrared CCD camera 62 receives infrared light reflected by a part of the user's body used for the input operation on the input screen S1, and acquires the input operation as image information based on the received light signal.

  According to this configuration, the user's input operation can be suitably acquired as image information regardless of day or night by using infrared rays. Moreover, it is hard to receive influence of what is called environmental light, such as sunlight or illumination light. Therefore, the recognition accuracy of the user input operation can be improved.

  (7) As the screen 42, a liquid crystal sheet 51 as a liquid crystal layer whose transparency can be adjusted according to an applied voltage, and two sheet-like transparent electrodes 52 provided on the two outer surfaces of the liquid crystal sheet 51. , 52 and two transparent films 53, 53 further provided on the outer surface of the transparent electrodes 52, 52 are used. Then, when the display control device 44 controls the projector 43 to project the input screen S1 on the screen 42, the display control device 44 applies a voltage to the liquid crystal sheet 51 through the transparent electrodes 52 and 52 so that the screen 42 becomes translucent. As a result, the projection light projected from the projector 43 is transmitted through the liquid crystal sheet 51 and is transmitted to the exit surface opposite to the incident surface on which the projection light of the liquid crystal sheet 51 is incident. Is displayed.

  According to this configuration, the transparency of the liquid crystal sheet 51 can be easily controlled through the control of the voltage applied to the transparent electrodes 52 and 52 by the display control device 44. Then, the input screen S1 can be suitably displayed on the screen 42.

  (8) As described above, the screen 42 is provided on the door glass 41, and the input screen S1 for inputting user identification information is displayed on the screen 42, so that the numeric keypad screen S1a and the palm-shaped input screen S1b are displayed. Can be secured sufficiently. For this reason, for example, it is suitable for an authentication method (such as palm-type authentication or PIN code authentication that requires a numeric keypad) in which the installation place is large due to the fact that the input device tends to be larger than fingerprint authentication or the like. Can respond. Incidentally, when the door glass 41 is not used as a display device, it is difficult to provide an authentication device such as a palm shape authentication and a password authentication around the door of the vehicle 10. This is because there are great restrictions on the mounting location, such as a locking / unlocking mechanism provided inside the door, and it is difficult to secure an installation location for an authentication device such as password authentication and palm-shaped authentication.

<Other embodiments>
In addition, you may implement this Embodiment as follows.
In the present embodiment, the screen 42 is provided on the side surface of the door glass 41 on the vehicle interior side, but may be provided on the side surface on the vehicle exterior side. Alternatively, the door glass 41 may be a pair glass made of two glass plates, and the screen 42 may be disposed between the glass plates.

  -In this Embodiment, although the screen 42 was provided in the door glass 41 by the side of a driver's seat, it is also possible to provide in another door glass. Further, screens 42 may be provided on all door glasses of the vehicle 10. In this case, the input screen S1 and the guidance screen S2 need only be displayed on any one of the screens.

  In the present embodiment, in a standby state where the user is not close to the vehicle 10, the display control device 44 keeps the screen 42 in a semi-transparent state so that the infrared CCD camera 62 can take a picture from inside the vehicle interior. However, it may be kept opaque. When the authentication of the electronic key 21 is established and the approach of the user to the vehicle 10 is detected, the display control device 44 applies a predetermined voltage to the transparent electrode 52 to make the screen 42 translucent. In this state, when the preliminary operation by the user is recognized through the infrared CCD camera 62, the input screen S1 and the guidance screen S2 are projected onto the screen 42. In this way, it is not necessary to energize the screen 42 during normal times, and power consumption can be saved. As described above, when the screens 42 are provided on all the door glasses of the vehicle 10, all the screens 42 are in an opaque state in the standby state of the vehicle 10. Therefore, confidentiality in the passenger compartment is suitably ensured. In this case, if the screen 42 is provided over the entire surface of the door glass 41, the confidentiality of the interior of the vehicle is more suitably secured.

  In the present embodiment, the screen 42 using liquid crystal is used, but a transparent film on which a fine three-dimensional structure that scatters the projection light projected from the projector 43 is formed can also be used as the screen. In this case, the input screen S1 and the guidance screen S2 are generated by the scattered light scattered through the three-dimensional structure.

  For example, as shown in FIG. 7A, a Fresnel lens sheet 73 in which a Fresnel lens 72 is formed as a fine three-dimensional structure on the surface of a transparent film 71 can be used as a screen. In this case, the Fresnel lens sheet 73 is disposed on the door glass 41 so that the projection light from the projector 43 is incident from the side surface opposite to the Fresnel lens 72. The projection light from the projector 43 is preferably refracted through the Fresnel lens sheet 73 toward the user outside the vehicle compartment. Therefore, the projection light from the projector 43 is scattered through the Fresnel lens 72 as a three-dimensional structure, and the input screen S1 and the guidance screen S2 are suitably displayed on the Fresnel lens sheet 73 as a screen.

  As shown in FIG. 7B, a lenticular lens sheet 76 in which a lenticular lens 75 is formed as a fine three-dimensional structure on the surface of the transparent film 74 can be used as a screen. As shown in the figure, the lenticular lens 75 is formed by arranging a plurality of kamaboko convex lenses extending in a predetermined direction (vertical or horizontal). Then, the lenticular lens sheet 76 is disposed on the door glass 41 so that the projection light from the projector 43 enters from the side surface opposite to the lenticular lens 75. The projection light from the projector 43 is preferably refracted and diffused through the lenticular lens sheet 76 in the horizontal direction or vertical direction of the user outside the vehicle compartment. Therefore, the projection light from the projector 43 is scattered through the lenticular lens 75 as a three-dimensional structure, and the input screen S1 and the guidance screen S2 are suitably displayed on the lenticular lens sheet 76 as a screen.

  Furthermore, as shown in FIG. 7C, the above-described Fresnel lens sheet 73 and the same lenticular lens sheet 76 can be combined and used as a screen. In this case, the Fresnel lens sheet 73 and the lenticular lens sheet 76 are disposed so that the Fresnel lens 72 and the lenticular lens 75 face each other, and the projection of the projector 43 from the back side where the Fresnel lens 72 of the Fresnel lens sheet 73 is not formed. Make light incident. Even in this case, the phase of the projection light from the projector 43 is suitably controlled through the Fresnel lens sheet 73 and the lenticular lens sheet 76. For example, it is possible to transmit or reflect light of a specific color in the projection light. Alternatively, the projection light can be converged in an arbitrary direction, or light entering from a specific direction can be reflected. As a result, the projection light from the projector 43 can be suitably delivered as an image to the eyes of the user outside the passenger compartment.

  In the present embodiment, as the transmissive screen 42, the following configuration can be adopted in addition to the above-described one. That is, a light diffusion sheet that functions as an imaging layer for a projected image, a translucent sheet that functions as a reinforcing material, and an antireflection sheet that suppresses the influence of disturbance light other than the projection light from the light source are laminated and integrated. It is also possible to adopt the screen as a screen. Moreover, you may employ | adopt as a transmissive screen what formed the diffraction grating of predetermined pitch in transparent films, such as a photopolymer. Such a diffraction grating can also be formed directly on the door glass 41. Furthermore, it is also possible to employ a transparent screen in which a diffusion layer containing a granular material that reflects light is formed on the surface of a transparent film having transparency and flexibility. Such a diffusion layer can be formed directly on the door glass 41. Even when these screens are employed, the projection light from the projector 43 preferably reaches the eyes of the user outside the passenger compartment as an image.

  In the present embodiment, the authentication control device 33 detects the approach of the user to the vehicle 10 based on the establishment of the authentication of the electronic key 21, but the user proximity detection in step S202 in the flowchart of FIG. It can also be performed by detecting whether or not a mechanical key is inserted into a key cylinder provided in the door. That is, as shown in FIG. 1, the key cylinder 81 provided on the door of the vehicle 10 is provided with an insertion detection sensor 83 that detects whether or not the mechanical key 82 is inserted into the key cylinder 81. The authentication control device 33 detects the approach of the user to the vehicle 10 based on the detection signal from the insertion detection sensor 83. In this way, the proximity of the user to the vehicle 10 can be easily detected through the insertion of the mechanical key 82 into the key cylinder 81. The insertion detection sensor 83 corresponds to the insertion detection means of the present invention.

  In the present embodiment, the presence / absence of the proximity of the user to the vehicle 10 is determined based on the success or failure of the authentication of the electronic key 21. However, as a detection unit that detects the proximity of the user to the vehicle 10, a human detection sensor Can also be provided separately. In this case, the human detection sensor is disposed on, for example, a front pillar (A pillar).

  In the present embodiment, both the electronic key system 12 and the personal authentication system 13 are mounted on the vehicle 10, but it is also possible to omit the electronic key system 12 and use the personal authentication system 13 as a key system. In this case, when the authentication of the user's identity is established by the personal authentication system 13, the door lock of the vehicle 10 is unlocked or the engine is allowed to start. Even in this case, when the user gets into the vehicle 10, the personal authentication system 13 confirms the identity of the user, so that the crime prevention performance of the vehicle 10 is ensured. Note that the proximity detection of the user to the vehicle 10 in step S202 of the flowchart shown in FIG. 6 may be detected based on whether or not the mechanical key 82 is inserted into the key cylinder 81 described above, or from the human detection sensor described above. Detection may be performed based on the detection signal.

  In the present embodiment, when the preliminary operation by the user is recognized through the infrared CCD camera 62 after the authentication of the electronic key 21 is established, the projector 43 is activated to project the input screen S1 and the guidance screen S2 onto the screen 42. However, it is also possible to omit the preliminary operation as follows. That is, when the authentication of the electronic key 21 is established, the input control device 63 operates the infrared light emitting diode 61 and the infrared CCD camera 62, while the display control device 44 projects the input screen S1 and the guidance screen S2 on the screen 42. Accordingly, the projector 43 is operated. Even in this case, the photographing by the infrared CCD camera 62 and the projection of the input screen S1 and the guidance screen S2 by the projector 43 are performed only when the user approaches the vehicle 10. For this reason, when the user is away from the vehicle 10, shooting by the infrared CCD camera 62 and image display by the projector 43 are not performed. Therefore, useless shooting by the infrared CCD camera 62 and useless projection by the projector 43 are avoided.

  In the present embodiment, the personal identification number authentication and the biometric authentication (palm-shaped authentication) are used in combination. However, the personal identification number authentication may be omitted and a plurality of types of biometric authentication methods may be used in combination. That is, biometric authentication methods include fingerprint authentication, face authentication, glow authentication, retinal authentication, vein authentication, voice authentication, and the like in addition to the above-described palm-shaped authentication. Two, three or more of these authentication methods are used in appropriate combination.

  For example, when the palm authentication and the fingerprint authentication are combined, as shown in FIG. 8, the input screen S1 includes a palm input screen S1b (first input screen) and a fingerprint input screen S1c (second input screen). Prepare and configure. The palm-shape input screen S1b is used when the palm-shape information as the first biometric information of the user registered in advance in the authentication control device 33 as the user identification information is input. The fingerprint input screen S1c is used when the fingerprint information as the second biological information of the user registered in advance in the authentication control device 33 as the user identification information is input. Thus, by performing a combination of a plurality of types of biometric authentication, the authentication accuracy of the user's identity can be improved. In this case, the content of the guidance display on the guidance screen S2 is also changed according to the authentication method to be combined (for example, “Please hold your finger and hand over the input position”).

  As described above, when a plurality of types of authentication methods are used in combination, it is possible to set a threshold value that is a criterion for authentication to be lower than a threshold value when each authentication method is employed alone. . Even if it does in this way, a user's authentication system is ensured by employ | adopting a multiple types of authentication system.

In the present embodiment, password authentication and biometric authentication (palm-shaped authentication) are used in combination, but only one of them may be provided.
In the present embodiment, both the personal identification number and the palm shape are input, but either one may be selectively input. In this case, the door lock is unlocked when it is determined that the selectively entered personal identification number or palm shape information is valid.

  In the present embodiment, input is prompted in the order of password authentication and palm-shaped authentication, but it may be reversed. Further, the process may be shifted to the other authentication process only when one authentication is established. For example, when it is determined that one of the authentications is not established, the user is prompted to re-enter identification information without proceeding to the other authentication process. When it is determined that the re-input identification information has not been authenticated, the process is terminated, or notification is made to a predetermined contact through a not-shown notification means.

  In this embodiment, when a user gets into the vehicle interior, other authentication means such as a fingerprint authentication device, a face authentication device, an iris authentication device, retina authentication, vein authentication or voice authentication are separately provided in the vehicle interior. Further, authentication by the authentication means can be further performed. In this way, the crime prevention performance of the vehicle 10 can be further improved.

  In the present embodiment, the infrared CCD camera 62 corresponding to the light in the infrared region is employed as the photographing means, but a CCD camera corresponding to the light in the visible light region can also be employed. In this case, the infrared light emitting diode can be omitted. Further, a CCD camera having light receiving sensitivity from the visible light region to the infrared region may be employed.

  In the present embodiment, the infrared light emitting diode 61 and the infrared CCD camera 62 are disposed inside the door 46, but may be disposed in other parts. For example, the infrared light emitting diode 61 and the infrared CCD camera 62 can be disposed on a room lamp, an inner mirror, a dashboard, or the like.

  In the present embodiment, the projector 43 is disposed inside the door 46. However, the projector 43 may be disposed not only in the door 46 but also in other parts of the vehicle interior. For example, it is possible to arrange the projector 43 on the ceiling in the vehicle interior.

  In the present embodiment, the user is prompted to enter a numeric keypad and a palm, and a message for notifying the operation procedure is displayed on the guidance screen S2, but the guidance screen S2 is not displayed. Is also possible. Moreover, it is also possible to perform voice guidance through a speaker instead of the display on the guidance screen S2.

<Other technical ideas>
Next, the technical idea that can be grasped from the embodiment will be described below.
(A) It is provided with detection means for detecting the proximity of the user to the vehicle, and the input control means activates the photographing means based on a detection signal from the detection means, and a preliminary operation predetermined by the user by the photographing means is performed. When acquired as image information, a display request signal indicating that the input screen is required to be projected onto the screen is sent to the display control means, and the display control means is configured to display the screen based on the display request signal sent from the input control means. The personal authentication system according to claim 1, wherein the projection unit is controlled to project an input screen.
According to this configuration, the input screen is projected on the screen only when the user approaches the vehicle and performs a predetermined preliminary operation. For this reason, an input screen is not displayed on a screen only by a user approaching a vehicle, and useless projection of a projection means is avoided.

(B) It is provided with detection means for detecting the proximity of the user to the vehicle, and upon receiving a detection signal from the detection means, the input control means activates the photographing means, while the display control means projects an input screen on the screen. The personal authentication system according to any one of claims 1 to 4, wherein the projection unit is controlled accordingly.
According to this configuration, photographing by the photographing unit and projection of the input screen by the projecting unit are performed only when the user approaches the vehicle. For this reason, when the user is away from the vehicle, shooting and display are not performed. Therefore, unauthorized photographing by the photographing means and useless projection of the projecting means are avoided.

(C) The personal authentication system according to (a) or (b), wherein the detection means is an insertion detection means for detecting insertion of a mechanical key into a key cylinder provided in a vehicle door. system.
According to this configuration, it is possible to easily detect the proximity of the user to the vehicle through insertion of the mechanical key into the key cylinder.

(D) In the personal authentication system described in the above (a) or (b), the detection means can detect the electronic key through wireless communication with an electronic key possessed to indicate the position of the user. A personal authentication system, which is a determination unit that determines that a vehicle is within a predetermined area around a door of a vehicle based on position information obtained by the electronic key.
According to this configuration, it can be easily detected through wireless communication between the electronic key and the determination means that the user who possesses the electronic key has approached the vehicle and has entered a predetermined area defined around the door. .

(E) In the personal authentication system according to any one of claims 1 to 4 or (i) to (d), the input device irradiates the screen with infrared rays from the vehicle interior side. And infrared imaging means for receiving the infrared rays reflected by a part of the user's body used for the input operation on the input screen, and the input operation based on the received light signal as image information. Personal authentication system as an infrared camera to acquire as.
According to this configuration, the user's input operation can be suitably acquired as image information regardless of day or night by using infrared rays. Moreover, it is hard to receive influence of what is called environmental light, such as sunlight or illumination light. Therefore, the recognition accuracy of the user input operation can be improved.

(F) In the personal authentication system according to any one of claims 1 to 4 or any one of the items (a) to (e), the screen is applied with an applied voltage. A liquid crystal layer whose transparency can be adjusted according to the above, two sheet-like transparent electrodes provided on the two outer surfaces of the liquid crystal layer, and two transparent films further provided on the outer surfaces of the transparent electrodes When the display control unit controls the projection unit to project the input screen on the screen, the projection light projected from the projection unit is transmitted through the liquid crystal layer and incident on the liquid crystal layer. A personal authentication system for controlling a voltage applied to a liquid crystal layer through a transparent electrode so that the input screen is displayed by transmitting to an exit surface opposite to the incident surface.
According to this configuration, the transparency of the liquid crystal layer is suitably controlled through the control of the voltage applied to the transparent electrode by the display control means. As a result, the input screen is suitably displayed on the screen.

(G) In the personal authentication system according to any one of claims 1 to 4 or any one of (A) to (E), the screen is projected from a projection unit. A personal authentication system in which a transparent film on which a fine three-dimensional structure for scattering projected light is formed is formed, and the input screen is generated by scattered light scattered through the three-dimensional structure.
According to this configuration, the projection screen is scattered through the three-dimensional structure, so that the input screen is suitably displayed on the screen.

(H) In the personal authentication system described in (F) above, the display control means is set to make the screen translucent in a standby state of the vehicle in which the proximity of the user to the vehicle is not detected through the detection means. A personal authentication system that applies voltage to two transparent electrodes.
According to this configuration, since the screen is kept translucent in the standby state of the vehicle, the user can be preferably photographed from the vehicle interior side when the photographing unit is operated.

(I) In the personal authentication system described in the above (f), the display control means makes the screen translucent or transparent when it is determined by the authentication control device that the input user identification information is valid. A personal authentication system in which a voltage set to be applied is applied to two transparent electrodes.
According to this configuration, even after the identity of the user is confirmed, that is, after getting on, the door glass is kept translucent or transparent. For this reason, the visibility of the user at the time of boarding can be suitably secured.

(N) In the case where the technical idea of the item (f) is applied to the item (b), the display control means makes the screen opaque when the proximity of the user to the vehicle is not detected through the detection means. When the voltage set to be applied is applied to the two transparent electrodes while the proximity of the user to the vehicle is detected through the detecting means, the voltage set to make the screen translucent is applied to the two transparent electrodes. Apply personal authentication system.
According to this configuration, since no voltage is applied to the transparent electrode during standby of the vehicle, power consumption in the standby state can be saved. Further, when the user approaches the vehicle, the screen becomes translucent so that the image projected by the projection means is formed on the screen 42. For this reason, the display of the input screen on the screen is also performed at a suitable timing according to the proximity of the user to the vehicle.

(L) The personal authentication system according to item (f), wherein the screen is provided on the vehicle rear side of the door glass.
According to this configuration, even when the liquid crystal layer shows opacity, the outside of the passenger compartment can be visually observed through the vehicle front side of the door glass. Thus, the visibility of the door glass is not completely impaired.

In the personal authentication system according to any one of (O) and claims 2 to 4 or any one of (A) to (L), a combination of several types of authentication methods is used. In such a case, a personal authentication system in which a threshold value used as a determination criterion for authentication in these authentication methods is set lower than a threshold value when each authentication method is employed alone.
Even if this configuration is adopted, a user authentication system is ensured.

The block block diagram which shows the outline of the antitheft system of this Embodiment. (A) is a schematic perspective view which similarly shows the arrangement | positioning aspect in the door of a personal authentication system, (b) is the front view which similarly looked at the screen from the vehicle interior. Sectional drawing which shows schematic structure of a screen similarly. (A) is principal part sectional drawing of the screen which similarly shows the aspect of the arrangement of the liquid crystal at the time of non-energization, (b) is principal part sectional drawing of the screen which similarly shows the aspect of the arrangement of the liquid crystal at the time of electricity supply. The flowchart which similarly shows the flow of operation | movement of an antitheft system. The flowchart which similarly shows the flow of operation | movement of a personal authentication system. (A) is a fragmentary sectional view of a Fresnel lens sheet in another embodiment, (b) is a fragmentary sectional view of the same lenticular lens sheet, and (c) is a similar Fresnel lens sheet and lenticular lens sheet. The principal part sectional drawing of the screen comprised combining. The front view of the door glass which shows the input screen in other embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 13 ... Personal authentication system, 21 ... Electronic key, 22 ... Collation control apparatus (determination means which comprises a detection means), 31 ... Display apparatus, 32 ... Input device, 33 ... Authentication control apparatus, 41 ... Door glass , 42 ... screen, 43 ... projector (projection means), 44 ... display control device (display control means), 46 ... door, 51 ... liquid crystal sheet (liquid crystal layer), 52 ... transparent electrode, 53 ... transparent film, 61 ... infrared rays Light emitting diode (infrared irradiation means), 62... Infrared CCD camera (imaging means, infrared camera), 63... Input control device (input control means), 71 and 74. Lenticular lens (three-dimensional structure), 81 key cylinder, 82 mechanical key, 83 insertion detection sensor (insertion detection means), S1 input screen S1a ... numeric keypad screen (the first input screen), S1b ... palm-shaped input screen (the second of the input screen).

Claims (4)

A personal authentication system for a vehicle that confirms the identity of the user when the user gets on the vehicle,
A transmissive screen provided on the door glass; a projection means for projecting an input screen for inputting user identification information to the screen from the vehicle interior; and a display control means for controlling the projection means to project the input screen on the screen. A display device comprising:
Image capturing means for acquiring the input operation as image information by capturing the user input operation on the input screen from the vehicle interior side, and input control means for acquiring user identification information based on the image information acquired through the image capturing means An input device comprising:
A personal authentication system comprising: an authentication control device that determines the validity of user identification information acquired by the input control means and authenticates the identity of the user when it is determined to be valid. The personal authentication system according to claim 1,
The display control means controls the projection means to display on the screen an input screen for inputting a plurality of types of identification information corresponding to a plurality of types of authentication methods,
The input control means acquires a plurality of types of identification information corresponding to a plurality of types of authentication methods based on image information acquired through the photographing means,
The authentication control apparatus is a personal authentication system that authenticates a user's identity when it is determined that all of a plurality of types of identification information acquired by the input control means are valid. In the personal authentication system according to claim 2,
The input screen is a first input screen for inputting a personal identification number previously registered in the authentication control device as the identification information, and a second input for inputting the user's biometric information registered in the authentication control device in advance as the identification information. A personal authentication system with an input screen. In the personal authentication system according to claim 2,
The input screen includes a first input screen for inputting first biometric information of a user registered in advance in the authentication control device as the identification information, and a second of a user registered in advance in the authentication control device as the identification information. A personal authentication system comprising a second input screen for inputting the biometric information.

Images