JP3032679U - Fingerprint identification device - Google Patents

Abstract

(57) Abstract: A fingerprint identification device is provided which is capable of increasing the processing speed and increasing the sharpness of an image by eliminating a prism to obtain a more elaborate result. SOLUTION: A glass plate with which a finger pad is contacted, a light source that irradiates the glass plate with light, and a fingerprint image is sent by reflected light of the light, and the fingerprint image is processed to obtain authentic data. In a fingerprint identification device including a processing device to be compared, a CCD camera is used as the processing device, a green LED adapted to the spectral resolution characteristic of the CCD camera is used as a light source, and the reflected light is transferred to the CCD camera. Is sent through a lens, and a switching sensor that detects the presence of the contacted finger pad and activates the processing device is arranged near the glass plate with which the finger pad is contacted. I will.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a fingerprint identification device, particularly for opening and closing doors of rooms and lockers, starting and stopping various machines, etc., by using fingerprints as a medium instead of commonly used keys and cards for further safety. For improving the fingerprint identification device in the lock device to obtain reliability and reliability.

[0002]

[Prior art]

 In general, the fingerprint identification device has a structure as shown in FIG. In FIG. 4, reference numeral 1 denotes a triangular prism, and light is incident from the first surface 1a of the triangular prism 1 by the red LEDs 2, 2 ... With a directionality orthogonal to the first surface 1a. To be done.

Here, the finger 3 is set with the abdomen (fingerprint portion) of the finger 3 abutting on the second surface 1 b to which the light from the red LEDs 2, 2, ... The light from the red LEDs 2, 2, ... Is reflected and emitted from the third surface 1c of the triangular prism 1 as an image in which the shadow of the fingerprint is emphasized due to the difference in reflectivity in the valley portion forming the fingerprint. The fingerprint is identified by sending it to the CCD camera 5 through the lens 4 and immediately comparing the image captured by the CCD camera 5 with the registered genuine data.

[0004]

[Problems to be solved by the device]

 However, according to this conventional fingerprint identification device, the triangular prism 1 is a condition for the configuration, and it is difficult to focus on it. If the focus is on the center, a pint shift occurs in the front and back, and a clear image cannot be obtained. In addition, the spectral resolution characteristic of the CCD camera 5 of the red LEDs 2, 2, ... Has a maximum value in the vicinity of 550 nm, and the light cannot be effectively used. Furthermore, in order to activate the device itself, switching for activation is performed, which requires time for processing.

[0005]

[The purpose of the device]

 Therefore, the present invention was made by paying attention to the actual situation and problems of the above-mentioned conventional technology.By solving these problems, the processing speed is increased and the sharpness of the image is eliminated by eliminating the prism. It is an object of the present invention to provide a fingerprint recognition device which is capable of obtaining more elaborate results.

[0006]

[Means for Solving the Problems]

 In order to achieve this object, a fingerprint identification device according to the present invention uses a glass plate on which a finger pad is abutted, a light source that irradiates the glass plate with light, and a reflected light of the light. An image is sent, and a fingerprint identification device comprising a processing device for processing the fingerprint image and comparing it with the authentic data, a CCD camera is used as the processing device, and a spectral resolution characteristic of the CCD camera is used as a light source. It is characterized by using a green LED adapted to, and transmitting the reflected light to the CCD camera through a lens, and in the vicinity of the glass plate to which the above-mentioned finger pad is contacted, the contacted finger pad It is characterized in that a switching sensor for detecting the presence and activating the processing device is arranged.

[0007]

[Action]

 With the above configuration, the green LED is used as the light source instead of the red LED, and the light can be used more effectively, and the prism is not necessary in the configuration, and the occurrence of defocus is prevented. Furthermore, by bringing the fingerprint into contact with the glass surface, the device can be started up without requiring any special work, thus increasing the processing speed.

[0008]

[Embodiment of device]

 Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a front view showing an outline of a fingerprint identification device embodying the present invention, FIG. 2 is a front view showing an outline of a second embodiment, and FIG. 3 is a side view showing an arrangement of switching sensors. .

In these figures, 10 is a glass plate, and the finger 3 is set by abutting a finger pad (fingerprint portion) on the glass plate 10. A light shielding plate 11 is arranged below the glass plate 10, and green LEDs 12, 12, ... Are provided on the light shielding plate 11. The green LEDs 12, 12, ... Are arranged below the light shielding plate 11 and have a peak emission point at 565 nm that matches the spectral resolution characteristic of the CCD camera 5 to which the fingerprint image is sent from the finger 3 via the lens 4. Exists.

In the case of the second embodiment shown in FIG. 2, a half mirror 13 tilted and fixed at 45 degrees is arranged below the glass plate 10 with which the finger 3 comes into contact. 13 is irradiated with light from the green LEDs 12, 12, ... From the side, reflected to pick up a fingerprint image from the finger 3, and sent to the CCD camera 5 via the lens 4.

Further, a switching sensor 14 is arranged in the vicinity of the glass plate 10 in the present embodiment, particularly in the vicinity of the base of the finger 3 when the finger 3 is brought into contact. The switching sensor 14 activates a CPU 15 which performs comparison and calculation as a processing device, and various types such as a push type, a touch type or an optical system, and a temperature system combined with body temperature can be supported.

[0012]

[Effect of device]

 The fingerprint identifying device according to the present invention is configured as described above. Therefore, light can be effectively used as image data sending means without causing focus shift, and the speed of the fingerprint identification device can be increased, thus eliminating the need for prisms, etc. Therefore, the price can be supplied to consumers as lower price than before.

[Brief description of drawings]

FIG. 1 is a front view showing an outline of a fingerprint identification device embodying the present invention.

FIG. 2 is a front view showing the outline of a second embodiment.

FIG. 3 is a schematic side view showing an arrangement of switching sensors.

FIG. 4 is a schematic front view showing a conventional example.

[Explanation of symbols]

 4 Lens 5 CCD Camera 10 Glass Plate 11 Light-Shielding Plate 12 Green LED 13 Half Mirror 14 Switching Sensor 15 CPU

Claims (2)

[Scope of utility model registration request] 1. A glass plate with which a finger pad is contacted, a light source for irradiating the glass plate with light, and a fingerprint image is sent by reflected light of the light, and the fingerprint image is processed to obtain authentic data. In the fingerprint identification device including a processing device to be compared with, a CCD camera is used as the processing device, a green LED adapted to the spectral resolution characteristic of the CCD camera is used as a light source, and a CCD camera of reflected light thereof is used. Fingerprint identification device characterized in that it is sent to the lens via a lens. 2. A switching sensor for detecting the presence of the abutted finger pad and activating the processing device is arranged in the vicinity of the glass plate with which the finger pad is abutted. The fingerprint identification device according to claim 1.