CN215769545U - Safety display based on finger vein recognition - Google Patents

Abstract

The utility model particularly relates to a safe display based on finger vein recognition, which comprises a display drive board and a display screen, wherein the display drive board is connected with the display screen through a flat cable and comprises a signal processing board and a finger vein module, an external host is connected with the signal processing board through an HDMI/DVI signal line, the signal processing board is connected with the display drive board through an HDMI/DVI signal line, the finger vein module is used for storing, comparing and recognizing vein information data of a user and sending the vein information data to the signal processing board according to a recognition result, and the signal processing board controls the connection and disconnection of signals between the host and the display drive board. The biological identification technology can not be lost or stolen, and has no memory password burden; the coating is not influenced by rough skin and external environment (temperature and humidity); the method has the advantages of wide applicable population, high accuracy, no copying, no counterfeiting, safety and convenience.

Description

Safety display based on finger vein recognition

Technical Field

The utility model relates to the technical field of safety display, in particular to a safety display based on finger vein identification.

Background

With the advancement of the times, electronic data has become an important form of data storage, and a display serves as a window for displaying the electronic data, so that the risk of data leakage exists. The display is opened or closed through a power switch of the display, and in some departments needing to prevent disclosure, when a computer user temporarily walks away, the display is only closed, so that the display is easily opened and peeped, a system password is set, and the risk of password leakage and theft is also caused.

In order to improve the safety, some displays have a fingerprint identification switch function, and only specific people can turn on the displays, so that the defect that the existing display switches have no identification function is overcome, but fingerprints are possibly copied, the safety is not high enough, and the identification rate is low under the conditions of finger abrasion, skin breaking and the like, so that inconvenience is brought to users in use.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a safety display based on finger vein identification, which ensures the safety of the use of the display.

In order to realize the purpose, the utility model adopts the technical scheme that: the utility model provides a safe display based on finger vein discernment, including display drive plate and display screen, the display screen is connected through the winding displacement to the display drive plate, still include signal processing board and finger vein module, external host computer passes through HDMI/DVI signal line connection signal processing board, the display drive plate is connected through HDMI/DVI signal line to the signal processing board, the finger vein module is used for the storage, contrast discernment user's vein information data and send for the signal processing board according to the result of discernment, the break-make of signal between signal processing board according to discernment result control host computer and the display drive plate.

Compared with the prior art, the utility model has the following technical effects: by using the finger vein biological recognition technology, the identity information of a user is recognized, the output of a video signal on a display is controlled, the safety is high, the recognition accuracy is high, and the content on the display can be better protected; by adopting the biological identification technology, the password can not be lost or stolen and the burden of memorizing the password is avoided; the recorded information is the internal information of the human body and is not influenced by the rough epidermis and the external environment (temperature and humidity); the method has the advantages of wide applicable population, high accuracy, no copying, no counterfeiting, safety and convenience.

Drawings

FIG. 1 is a functional block diagram of the present invention;

FIG. 2 is a circuit schematic of the signal processing board and finger vein module;

FIG. 3 is a control flow diagram of a maintenance client and finger vein module;

fig. 4 is a control flow diagram of the present invention.

Detailed Description

The present invention will be described in further detail with reference to fig. 1 to 4.

Referring to fig. 1, a safety display based on finger vein recognition, including a display driver board 20 and a display screen 10, the display driver board 20 is connected to the display screen 10 through a flat cable, including a signal processing board 30 and a finger vein module 50, an external host 40 is connected to the signal processing board 30 through an HDMI/DVI signal line, the signal processing board 30 is connected to the display driver board 20 through an HDMI/DVI signal line, the finger vein module 50 is used to store, compare and recognize vein information data of a user and send the vein information data to the signal processing board 30 according to a recognition result, and the signal processing board 30 controls the connection and disconnection of signals between the host 40 and the display driver board 20 according to the recognition result. Through using finger vein biological identification technique, discernment user's identity information, the output of the video signal on the control display, the security is high, the discernment rate of accuracy is high, can be better the content on the protection display.

The finger vein recognition technology is a biological recognition technology which is most advanced in the world and has high precision and high speed, and personal recognition is performed by using vein grain images obtained after near infrared rays penetrate fingers. Among various biometric techniques, since the biometric technique performs recognition using an internal feature of a living body invisible from the outside, the biometric technique attracts attention as a second-generation biometric technique having high forgery prevention property. Compared with other biometric identification technologies, the finger vein authentication technology has the following main advantages.

1. The biological identification technology can not be lost, stolen and not bear the memory password.

2. The internal information of the human body is not influenced by the rough epidermis and the external environment (temperature and humidity).

3. The method has the advantages of wide applicable population, high accuracy, no copying, no counterfeiting, safety and convenience.

In addition, the signal processing board 30 is used to control the on/off of the signal between the host 40 and the display driving board 20, and the control can be conveniently performed according to the identification result of the finger vein module.

Simultaneously, the above-mentioned HDMI signal line or DVI signal line that only mentions comparatively commonly used, in the in-service use, can also use the signal line that has VGA interface, Type-C interface etc. only need additionally select the adapter or set up some interfaces more on the signal processing board can.

Referring to fig. 2, further, the signal processing board 30 may have various implementations, such as HDMI signal line or DVI signal line with on-off switch. In the present invention, preferably, the signal processing board 30 includes an FPGA chip, an HDMI input interface and/or DVI input interface, an HDMI output interface and/or DVI output interface, the host 40 is connected to the FPGA chip through the HDMI input interface or DVI input interface, and the display driver board 20 is connected to the FPGA chip through the HDMI output interface or DVI output interface. The FPGA chip is a mature technology, and the on-off of the video signal is controlled very conveniently through the FPGA chip. In addition, the input interface and the output interface may be selected according to actual conditions, or a plurality of interfaces may be provided to make the device more widely applicable, and these interfaces may be set in detail according to actual requirements.

Further, the finger vein module 50 is connected with the FPGA chip through a serial port for outputting the recognition result to the FPGA chip, and the FPGA chip controls the on/off of the signal between the host 40 and the display drive board 20 according to the recognition result. In the present case, what we used is the VM661J finger vein module 50 of saint point century science and technology limited, and when in use, it is directly connected to the FPGA chip through a serial port. The finger vein module 50 has high integration level, and can directly identify the finger of the user and return an identification result.

Referring to fig. 3, the finger vein module 50 can conveniently identify a user, but when a user of the display changes, operations such as adding and deleting finger vein information stored in the finger vein module 50 are required, and related operations are conveniently and reliably performed, and here, the system preferably includes a maintenance client 60, the signal processing board 30 is provided with a USB interface, the maintenance client 60 is connected to an FPGA chip through the USB interface, and the FPGA chip is used for bridging the maintenance client 60 and the finger vein module 50. The VM661J finger vein module 50 may be directly connected to the maintenance client 60 to perform corresponding modification operations, but considering that the finger vein module 50 is already connected to the FPGA chip through a serial port, the maintenance client 60 and the finger vein module 50 may be connected quickly and reliably through the bridging function of the FPGA chip. After the two are bridged, the maintenance client 60 outputs the instruction for finger vein entry and deletion to the finger vein module 50 and receives the returned result of the operation for finger vein entry and deletion fed back by the finger vein module 50, so that the finger vein information can be conveniently managed, and the specific flow is shown in fig. 3.

Further, in order to improve the safety of the display during the use process, in this case, further, when the host signal received by the FPGA chip is interrupted or the host signal is not received, the signal between the host 40 and the display driver board 20 is controlled to be disconnected. For example, when the user restarts the host or enters a sleep state to wake up, the identity of the user needs to be re-verified.

The operation of the apparatus will be described in further detail with reference to fig. 4.

After the display is powered on, because the display driver board 20 and the host 40 are disconnected, no display is made on the display screen 10 at this time, and when the user successfully authenticates through the finger vein module 50, the display driver board 20 and the host 40 are successfully connected, and the display screen 10 displays corresponding contents.

In the state that the display screen 10 is lighted up and displays contents, if the user sets the host 40 to the sleep mode or restarts the host 40, the signal output by the host 40 is interrupted, at this time, the display screen 10 does not display anything, and the signal processing board 30 restores the finger vein authentication state to the non-passing state. When the host 40 is successfully restarted or the host 40 wakes up from the sleep mode, the host 40 outputs a signal, but the signal processing board 30 cuts off the connection between the host 40 and the display driver board 20, the display screen 10 still does not display any signal, and only after the identification verification through the finger vein module 50 is successful, the display driver board 20 and the host 40 are successfully connected, and the display screen 10 displays corresponding content.

In the foregoing, for convenience of description, expressions such as "the display driver board 20 and the host 40 are successfully connected" or "the display driver board 20 and the host 40 are disconnected" are used, and in this case, the signal processing board 30 formed by an FPGA chip is used to control on/off of the host 40 and the display driver board 20, so that, in terms of a physical structure, the host 40 is always connected to the display driver board 20 through the signal processing board 30, but is not always logically connected, where "successful connection" indicates that the signal processing board 30 outputs a received signal of the host 40 to the display driver board 20, and "disconnected" indicates that the signal processing board 30 does not output a received signal of the host 40 to the display driver board 20.

Furthermore, a watermark embedding unit is arranged in the FPGA chip, the finger vein module 50 is connected with the watermark embedding unit, the finger vein module 50 sends the identified user identity information to the watermark embedding unit, and the watermark embedding unit adds a watermark to the video output by the host 40 according to the user identity information. The video watermark embedding is a very mature technology, in the embodiment, no improvement is made on how to embed the watermark, and the existing watermark embedding technology in the prior art is used, so that the improvement point of the scheme is as follows: the finger vein module 50 is connected with the watermark embedding unit, so that the watermark embedding unit can add watermarks to the video according to the user identity information identified by the finger vein module 50, and the watermarks embedded in the display content on the display screen 10 are ensured to be associated with the user identity information identified by the finger vein module 50, so that the display is safer to use, on one hand, the display can be opened only by a user who inputs the finger vein information, and on the other hand, the identity information of the user can be embedded in the displayed content as the watermarks after the display is opened. The watermark can be a clear watermark or a hidden watermark, and can be selected according to the requirements of users.

Claims (6)

1. A safe display based on finger vein discernment, includes display drive board (20) and display screen (10), and display drive board (20) are through winding displacement connection display screen (10), its characterized in that: including signal processing board (30) and finger vein module (50), signal processing board (30) are connected through HDMI/DVI signal line to external host computer (40), signal processing board (30) are through HDMI/DVI signal line connection display drive board (20), finger vein module (50) are used for the storage, contrast discernment user's vein information data and send for signal processing board (30) according to the result of discernment, signal processing board (30) are according to the break-make of signal between identification result control host computer (40) and display drive board (20).

2. The finger vein identification based security display of claim 1, wherein: the signal processing board (30) comprises an FPGA chip, an HDMI input interface and/or a DVI input interface, an HDMI output interface and/or a DVI output interface, the host (40) is connected with the FPGA chip through the HDMI input interface or the DVI input interface, and the display driving board (20) is connected with the FPGA chip through the HDMI output interface or the DVI output interface.

3. The finger vein identification based security display of claim 2, wherein: the finger vein module (50) is connected with the FPGA chip through a serial port and used for outputting the identification result to the FPGA chip, and the FPGA chip controls the connection and disconnection of signals between the host (40) and the display drive board (20) according to the identification result.

4. The finger vein identification based security display of claim 2, wherein: the device comprises a maintenance client (60), wherein a USB interface is arranged on a signal processing board (30), the maintenance client (60) is connected with an FPGA chip through the USB interface, the FPGA chip is used for bridging the maintenance client (60) and a finger vein module (50), and the maintenance client (60) outputs finger vein input and deletion instructions to the finger vein module (50) and receives finger vein input and deletion operations fed back by the finger vein module (50) to return results.

5. The finger vein identification based security display of claim 2, wherein: when the FPGA chip receives the signal interruption of the host (40), the signal processing board (30) restores the finger vein verification state to a non-passing state.

6. The finger vein identification based security display of claim 2, wherein: the FPGA chip is provided with a watermark embedding unit, the finger vein module (50) is connected with the watermark embedding unit, the finger vein module (50) sends identified user identity information to the watermark embedding unit, and the watermark embedding unit adds a watermark to a video output by the host (40) according to the user identity information.

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