KR101923320B1 - User Terminal which is able to Detect Fingerprint on Display and Method for Detecting Fingerprint - Google Patents

Abstract

The present invention relates to a user terminal enabling fingerprint recognition on a display unit and a fingerprint recognition method thereof. The user terminal includes: multiple light emitting elements and multiple light detection elements coupled to a display circuit board; a fingerprint contact area sensing unit which senses a contact area when a user′s finger comes in contact with the display unit for fingerprint recognition; a light emitting element control unit which controls the light emitting elements to be activated for obtaining specific division area images in the fingerprint contact area; a light detection element control unit which controls the light detection elements to be activated based on the total reflection angle range of the light emitting elements to be activated; and a fingerprint feature information generating unit which obtains the division area images from the activated light detection elements and uses the obtained division area images to generate fingerprint feature information. The terminal and method can be used to recognize fingerprints on the display unit of the terminal while using an optical system with a high-resolution scheme for fingerprint recognition.

Description

Technical Field [0001] The present invention relates to a user terminal capable of fingerprint recognition on a display,

Embodiments of the present invention relate to a fingerprint recognition apparatus and method using a user terminal, and more particularly, to a user terminal capable of fingerprint recognition on a display.

As the functions of personal information security and payment through biometrics are introduced into portable terminals such as smart phones, the biometric sensor market is rapidly growing. Fingerprint recognition, which occupies the largest portion among them, is widely regarded as the most simple and highly secure biometric method. However, the fingerprint sensor used in the portable terminal is a capacitive array type sensor, and its resolution is low (500 dpi). If the details of the fingerprint such as sweat glands can be seen, the security will be greatly improved and it will be able to be used without any problems in financial transaction or information security. However, since the resolution required is known to be higher than 1000 dpi, Is required.

On the other hand, attempts have been made to recognize fingerprints on a display of a terminal using an optical system. Since the display has an internal light source, the light from the light source is reflected on the fingerprint and the form of the fingerprint is read by the image sensor. However, a system using an optical system also requires a microlens or the like for condensing light due to scattering of light, and there is still a problem in that it requires a complicated image restoration algorithm.

It is an object of the present invention to propose a user terminal and a fingerprint recognition method capable of recognizing a fingerprint on a display.

Also, the present invention proposes a user terminal and a fingerprint recognition method capable of recognizing a fingerprint without using a condensing lens or a mirror at a high resolution.

According to an aspect of the present invention, there is provided a display device including: a plurality of light emitting elements and a plurality of light detecting elements coupled to a display circuit board; A fingerprint contact area sensing unit for sensing a contact area when a user's finger touches the display for fingerprint recognition; A light emitting element controller for controlling a light emitting element to be activated for acquiring a specific divided region image among the fingerprint contacting regions; A photodetector element control unit for controlling a photodetector element to be activated based on a total reflection angle range of the light emitting element to be activated; And a fingerprint feature information generating unit for obtaining a fingerprint feature information from the activated photodetector and using the obtained fingerprint feature images, and a user terminal capable of fingerprint recognition in a display.

The user terminal further includes a region division unit that divides the fingerprint contact region into a plurality of divided regions based on a total reflection angle range of the plurality of light emitting devices.

The fingerprint contact region sensing unit senses a fingerprint contact region using pressure information of the touch module.

The plurality of divided areas set by the area dividing unit are set to overlap in a predetermined portion.

The light emitting element controller activates a single light emitting element having a total reflection characteristic or a plurality of light emitting elements adjacent to each other for the specific divided region.

Wherein the light emitting element control unit sequentially activates light emitting elements corresponding to each of the divided regions to acquire the first through Nth divided region images, wherein the light detecting element control unit controls the light emitting elements based on the sequentially activated light emitting elements, Lt; / RTI >

The fingerprint feature information generating unit generates a fingerprint image by combining the divided region images, and generates the fingerprint feature information from the generated fingerprint image.

The user terminal further includes a buffer layer stacked on the display circuit board, and the buffer layer is formed of a material having a refractive index different from that of the display glass.

According to another aspect of the present invention, there is provided a display device comprising: a plurality of light emitting elements and a plurality of light detecting elements coupled to a display circuit board; A fingerprint contact area sensing unit for sensing a contact area when a user's finger touches the display for fingerprint recognition; An area dividing unit dividing the fingerprint contacting area into a plurality of divided areas based on a total reflection angle range of the plurality of light emitting devices, and a light emitting device to be activated based on the total reflection angle range of the plurality of light emitting devices A light emitting element control unit A photodetector element control unit for controlling a photodetector element to be activated based on the light emitting element to be activated; And a fingerprint feature information generating unit for generating fingerprint feature information using the optical information received by the optical detecting device.

According to another aspect of the present invention, there is provided a display device comprising: a plurality of light emitting elements and a plurality of light detecting elements coupled to a display circuit board; A fingerprint contact area sensing unit for sensing a contact area when a user's finger touches the display for fingerprint recognition; An area dividing unit dividing the fingerprint contacting area into a plurality of divided areas based on a total reflection angle range of the plurality of light emitting devices; A light emitting element controller for controlling a light emitting element to be activated for obtaining a specific divided region image among the plurality of divided regions; And a fingerprint feature information generation unit that obtains a segment region image from the light detection elements and generates finger feature information using the obtained segment region images.

According to another aspect of the present invention, there is provided a fingerprint recognition method in a terminal display in which a plurality of light emitting elements and a plurality of light detecting elements are combined on a display circuit board, (A) detecting an area; (B) controlling a light emitting element to be activated for acquisition of a specific one of the fingerprint contact areas; (C) controlling a light detecting element to be activated based on a total reflection angle range of the light emitting element to be activated; And a step (d) of obtaining a divided area image from the activated light detecting element and generating fingerprint characteristic information using the obtained divided area images.

The fingerprint recognition method further includes dividing the fingerprint contact area into a plurality of divided areas based on a total reflection angle range of the plurality of light emitting devices.

According to another aspect of the present invention, there is provided a fingerprint recognition method in a terminal display in which a plurality of light emitting elements and a plurality of photodetecting elements are combined on a display circuit board, (A); (B) controlling a light emitting element to be activated based on the fingerprint contact area and the total reflection angle range of the plurality of light emitting elements; (C) controlling a light detecting element to be activated based on the light emitting element to be activated; And (d) generating fingerprint feature information using optical information received by the optical detection element.

According to another aspect of the present invention, there is provided a fingerprint recognition method in a terminal display in which a plurality of light emitting elements and a plurality of photodetecting elements are combined on a display circuit board, (A); (B) dividing the fingerprint contact area into a plurality of divided areas based on a total reflection angle range of the plurality of light emitting devices; (C) controlling a light emitting element to be activated for acquiring a specific divided region image among the plurality of divided regions; And a step (d) of obtaining a segmented region image from the photodetector elements and generating fingerprint feature information using the obtained segmented region images.

According to the present invention, the fingerprint can be recognized on the display of the terminal.

In addition, the present invention has an advantage that a fingerprint can be recognized without using a condensing lens or a mirror at a high resolution.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining a fingerprint recognition structure in a user terminal capable of fingerprint recognition according to an embodiment of the present invention; FIG.
2 is a block diagram illustrating a configuration of a user terminal capable of fingerprint recognition in a display according to an embodiment of the present invention;
Fig. 3 is a two-dimensional view of a region capable of total internal reflection in a single light emitting device. Fig.
4 is a diagram illustrating an example of setting a divided area when fingerprint contact is recognized in a display according to an embodiment of the present invention.
5 is a view for explaining an example of setting an active region of a light detecting element according to an embodiment of the present invention;
6 is a block diagram showing the structure of a fingerprint feature information generating unit according to an embodiment of the present invention;
FIG. 7 is a flowchart showing an overall flow of a fingerprint recognition method in a display according to an embodiment of the present invention; FIG.
8 is a diagram illustrating a structure of a terminal to which a fingerprint recognition device according to another embodiment of the present invention is applied.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view for explaining a fingerprint recognition structure in a user terminal capable of fingerprint recognition according to an embodiment of the present invention.

The present invention proposes a structure in which, when a user touches a fingerprint on a display of a terminal such as a smart phone, the fingerprint can be recognized even if the fingerprint touches any position of the display. FIG. 1 is a sectional view of a terminal to which a fingerprint recognition apparatus and method according to an embodiment of the present invention is applied, and a fingerprint recognition principle of the present invention will be described with reference to FIG.

Referring to FIG. 1, a terminal to which the fingerprint recognition apparatus and method of the present invention is applied includes a display circuit board 100 and a display glass 110. A plurality of light emitting devices 102 for display are coupled to the display circuit board 100 and the light detecting devices 104 are coupled to the display circuit board 100 together with the light emitting devices.

이상일 경우 전반사가 발생하고

이하일 경우 전반사가 발생하지 않는다고 가정한다. 본 발명은 디스플레이를 위해 단말기에 이미 구비되어 있는 발광 소자(102)를 지문 인식을 위해 이용하는 것이다. 여기서, 발광 소자는 LED, OLED와 같은 알려진 다양한 발광 소자를 모두 포함할 수 있다는 점은 당업자에게 있어 자명할 것이다. It is assumed that a specific light emitting element among the plurality of light emitting elements 102 shown in FIG. 1 is turned on and the other light emitting element is inactivated. On the other hand, when the angle of the light reflected by the activated light emitting element 102 is

Total reflection occurs.

The total reflection does not occur. The present invention uses a light emitting element 102 already provided in a terminal for display for fingerprint recognition. It will be apparent to those skilled in the art that the light emitting device may include various known light emitting devices such as LEDs and OLEDs.

The fingerprint of the user is brought into contact with the display glass 110, and the fingerprint is made up of protruding portions and grooves as a groove region. In the present invention, the photodetector element 104 detects the reflected wave of light generated in the light emitting element to perform fingerprint recognition. Unlike a conventional terminal, a plurality of photodetector elements 104 are provided on a display circuit board . As the photodetector element 104, various known elements such as a photodiode and the like can be used.

 In Fig. 1, light irradiated by the activated light emitting element 102 is indicated by three kinds. The first path light is light irradiated outside the total reflection range and the second path light is the light irradiated into the total reflection range and irradiated to the area (groove area of the fingerprint) not in direct contact with the fingerprint, (The protruding region of the fingerprint) that is irradiated in the range region and is in contact with the fingerprint.

The first path light emitted from the activated light emitting element 102 causes reflection, transmission and refraction irrespective of whether there is direct contact with the fingerprint. The first path light is substantially scattered substantially at the interface of the glass, The reflected wave of the one-path light is input very weakly to the photodetector element 104 and substantially acts as noise.

The second path light in the total reflection range region does not directly contact the protruding portion of the fingerprint, so that the total path loss is performed for the second path light and the second path light for total reflection is received.

The third path light in the total reflection range region is irradiated to an area directly in contact with the fingerprint. In this case, the aspect of the reflected light is different from the second path light. As the glass-air medium changes into the glass-skin medium, the total reflection angle changes and diffuse reflection occurs. That is, the reflected light of the second path light is detected brightly by the corresponding photodetector element 104a due to total reflection, but the reflected light of the third path light is detected darkly by the corresponding photodetector element 104b.

The inventors of the present invention have found that reflection occurs in different directions when the light irradiated into the total reflection range of the light emitting element 102 is irradiated to a region directly contacting the fingerprint and when irradiated to a region not directly contacting the fingerprint And the present invention proposes a structure of an apparatus and a method for recognizing fingerprints on a display based thereon.

On the other hand, in Fig. 1, it can be seen that the distance A on the display expands to the distance A 'from the light detection area.

2 is a block diagram illustrating a configuration of a user terminal capable of fingerprint recognition in a display according to an exemplary embodiment of the present invention.

2, a user terminal according to an exemplary embodiment of the present invention includes a contact area sensing unit 200, an area dividing unit 210, a light emitting device activation control unit 220, a light detecting device activation control unit 230, And a feature information generating unit 240.

The contact area sensing unit 200 senses an area where the user touches the display on the display for fingerprint recognition. For example, the fingerprint contact area may be sensed using pressure information sensed by the touch module of the terminal. Of course, it will be apparent to those skilled in the art that fingerprint contact areas can also be detected in various ways.

When the fingerprint contact area is detected, the area dividing unit 210 divides the fingerprint contact area into a plurality of divided areas. As described above, the present invention obtains a fingerprint image by using reflection phenomenon occurring within the total reflection range region of the light emitting element 102. [ Since the total reflection range of one light emitting element 102 is limited, a region in which a proper fingerprint image can be obtained from one light emitting element is also limited.

The area dividing section 210 divides the fingerprint contact area based on the total reflection range of the light emitting element 102, and the fingerprint image acquisition of the light detecting elements 104 is performed in a divided area unit.

FIG. 3 is a view showing in two dimensions the region capable of total internal reflection in the light emitting device. FIG.

내지

일 경우, 홀이 형성된 영역은

보다 각도가 작은 영역에 해당된다. As shown in FIG. 3, the region where one light emitting element can be totally reflected from the viewpoint of the fingerprint contact region has a donut shape in which a hole is formed at the center. The total reflection range

To

, The region where the holes are formed

And corresponds to a region having a smaller angle.

It is possible to obtain an appropriate fingerprint image in the total reflection possible region shown in FIG. 3 when a specific light emitting element is activated, and the divided region is set based on the region capable of total reflection shown in FIG.

Referring to FIG. 3, since a hole region is included in one divided region (total reflection possible region), the divided region is set to overlap so that a proper fingerprint image can be obtained even in the hole region.

4 is a diagram illustrating an example of setting a divided area when fingerprint contact is recognized in a display according to an embodiment of the present invention.

Referring to FIG. 4, a plurality of divided regions are set for the fingerprint contact region, and the final fingerprint image is generated using the fingerprint image information in each divided region. 4, a hole is formed in the center of the first division area 400, and a fingerprint image of a region corresponding to the hole of the first division area is obtained. The fingerprint image of the second division area to the fourth division area 402, 404, 406, and 408 are overlapped with the first partition 400 and set.

As a result, the region dividing section 210 sets a plurality of divided regions for the fingerprint contact region in the same manner as in Fig.

When the divided area is set by the area dividing unit 210, it is necessary to activate the light emitting element 102 corresponding to the divided area set for acquiring the fingerprint image of the divided area, Thereby activating a light emitting element for acquiring an image.

For example, in FIG. 4, in order to acquire a fingerprint image of the first partition 400, the light emitting device activation controller 220 controls the first partition 400 ) Activates the light emitting element that causes total reflection. The light emitting element activated here is preferably a single light emitting element, but it will be apparent to those skilled in the art that a plurality of adjacent light emitting elements may be simultaneously activated if necessary.

When the fingerprint image of the first partition 400 is acquired, the light emitting element activation controller 220 activates the light emitting element for acquiring the fingerprint image of the second partition 402. In this way, a fingerprint image of all necessary divided areas is acquired.

The photodetecting element activation control unit 230 controls the activation of the photodetecting elements to receive light by total internal reflection of the light emitting element based on activation of the light emitting element. In the case of the light emitting element, a plurality of light detecting elements corresponding to the total reflection region of the activated light emitting element are activated.

5 is a diagram for explaining an example of setting an active region of a light detecting element according to an embodiment of the present invention.

내지

가 활성화된 발광 소자의 전반사 각도이며, 이 경우,

에 따른 반사파의 도달 거리는 L1으로 표현되며,

에 따른 반사파의 도달 거리는 L2로 표현된다. Referring to Figure 5,

To

Is the total reflection angle of the light emitting element in which the light emitting element is activated,

The arrival distance of the reflected wave according to < RTI ID = 0.0 >

Is represented by L2.

In this case, the photodetecting element activation controller 230 performs a control operation to activate the photodetecting elements at the L1 to L2 distances from the activated light emitting element. The photodetecting elements to be activated are indicated by concentric circles on the right side of Fig.

Of course, it will be apparent to those skilled in the art that not all of the light detecting elements at the L1 to L2 distances from the activated light emitting element but only some of the light detecting elements associated with the fingerprint contacting area may be activated.

As a result, when a plurality of divided regions are set and a fingerprint image for the first divided region is to be obtained, a single or a plurality of light emitting elements corresponding to the first divided region are activated and corresponding to the activated light emitting elements A plurality of photodetecting elements for activating the plurality of photodetecting elements are activated and operate to obtain a fingerprint image for the first divided region using the light receiving information of the plurality of photodetecting elements that are activated. This same operating principle applies equally to all the divided areas.

According to another embodiment of the present invention, the light detecting element is not particularly activated but the entire light detecting element is activated to acquire the fingerprint image, and then only the effective image region corresponding to the total reflection angle range of the activated light emitting element It may be selected by processing.

The fingerprint feature information generation unit 240 generates a final fingerprint image using the fingerprint image of each of the divided regions, and generates fingerprint feature information from the generated fingerprint image. As described above, a plurality of divided regions are overlapped, and a final fingerprint image is generated in consideration of overlapping portions.

6 is a block diagram illustrating the structure of a fingerprint feature information generation unit according to an embodiment of the present invention.

6, a fingerprint feature information generating unit 240 according to an exemplary embodiment of the present invention includes a divided region image obtaining unit 600, a coordinate correcting unit 610, a fingerprint image generating unit 620, 630, and a feature information generation unit 640.

The divided region image obtaining unit 600 obtains the divided region image for each divided region using the light receiving information of the light detecting element.

The coordinate setting unit 610 sets coordinates for setting a composite position of each divided region image to generate a final fingerprint image using each divided region image.

When the coordinates for synthesizing the respective divided region images are determined, the fingerprint image generating unit 620 generates the final fingerprint image through synthesis of the divided region images. As described above, the divided area images overlap in a specific area. According to an embodiment of the present invention, in the overlap region, the pixel values of the overlap region may be determined by summing up the pixel values of the divided region images and obtaining an average.

When a fingerprint image is generated by the fingerprint image generating unit 620, the post-processing unit 630 performs post-processing for improving the quality of the fingerprint image, and various methods of post-processing can be applied to those skilled in the art something to do.

The feature information generation unit 640 extracts feature information from the fingerprint image. Feature points and feature coordinates from the fingerprint image.

7 is a flowchart illustrating an overall flow of a fingerprint recognition method in a display according to an embodiment of the present invention.

Referring to FIG. 7, when the user touches the fingerprint on the display of the terminal for fingerprint recognition, the user's fingerprint contact area is sensed (step 700).

If a fingerprint contact area is detected, N divided areas for the fingerprint contact area are set (step 702). The N divided areas are set based on the total reflection angle range of the light emitting element.

When the setting of the divided area is completed, the light emitting element having the total reflection characteristic in the first divided area is activated (step 704). It is preferable to activate a single light emitting element, but a plurality of adjacent light emitting elements having total internal reflection characteristics in the first division region may be activated.

Activating photodetecting elements to receive light by total reflection of the activated light emitting element with activation of the light emitting element associated with the first partition (step 706). The activated light detecting elements are also determined based on the total reflection characteristic of the activated light emitting element.

A first segmented image is obtained using the light receiving information of the activated light detecting elements (step 708).

Steps 702 to 706 are applied to the second and the Nth divided areas in the same manner.

Once the first through N < th > segment images are acquired, a fingerprint image is generated through synthesis of segment images (step 710). As described above, since each divided area is overlapped, the average value of each divided area image in the overlapping area may be set as the pixel value. Of course, other approaches such as weighted averaging may be applied.

Once the fingerprint image is obtained, feature information including the feature point information and the feature point coordinates is generated from the fingerprint image (step 712).

FIG. 8 is a diagram illustrating a structure of a terminal to which a fingerprint recognition apparatus according to another embodiment of the present invention is applied.

Referring to FIG. 8, a buffer layer 805 may be formed between the display circuit board 800 and the display glass 810 as compared with the embodiment of FIG. At this time, the material constituting the buffer layer is a material having a refractive index different from that of glass.

According to one embodiment of the present invention, the material constituting the buffer layer 805 may comprise a UV curable adhesive.

As described above, the divided area is determined based on the total reflection angle range of the light emitting element. If the total reflection angle range is increased, a smaller number of divided areas would be required, thereby reducing the overall fingerprint recognition time.

The buffer layer 805 is formed between the display circuit board 800 and the display glass 810 for enlarging the total reflection angle range and forms a buffer layer with a material having a refractive index different from that of glass .

Meanwhile, various structures for increasing the total reflection angle range may be employed in the terminal. For example, FIG. 1 shows a case in which the display circuit board has a horizontal structure, but if the display circuit board is appropriately bent, the total reflection angle range can be enlarged.

The present invention as described above enables fingerprint recognition on a display without requiring a complicated image restoration algorithm without using a separate mechanism such as a microlens. In addition, the present invention enables fingerprint recognition at a high resolution, so that fingerprint feature information such as sweat glands as well as fingerprint features can be effectively recognized.

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains. Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

Claims (20)

A plurality of light emitting elements and a plurality of light detecting elements coupled to the display circuit board;
A fingerprint contact area sensing unit for sensing a contact area when a user's finger touches the display for fingerprint recognition;
A light emitting element controller for controlling a light emitting element to be activated for acquiring a specific divided region image among the fingerprint contacting regions;
A photodetector element control unit for controlling a photodetector element to be activated based on a total reflection angle range of the light emitting element to be activated;
A fingerprint feature information generating unit for obtaining a divided region image from the activated photodetector and generating fingerprint feature information using the obtained divided region images; And
And a region dividing unit dividing the fingerprint contact region into a plurality of divided regions based on a total reflection angle range of the plurality of light emitting devices,
The light detecting element control unit controls to activate the light detecting elements located within the total reflection angle range of the light emitting element to be activated, and the plurality of divided regions set by the region dividing unit have a donut shape in which a hole is formed at the center Wherein the plurality of divided regions are set to overlap at a predetermined portion so that an appropriate fingerprint image in the hole region is obtained.
delete The method according to claim 1,
Wherein the fingerprint contact area sensing unit senses a fingerprint contact area using pressure information of the touch module.
delete The method according to claim 1,
Wherein the light emitting element control unit activates a single light emitting element having a total internal reflection characteristic or a plurality of light emitting elements adjacent to each other for the specific divided region.
6. The method of claim 5,
Wherein the light emitting element control unit sequentially activates light emitting elements corresponding to each of the divided regions to acquire the first through Nth divided region images, wherein the light detecting element control unit controls the light emitting elements based on the sequentially activated light emitting elements, The user terminal being capable of fingerprint recognition in the display.
The method according to claim 1,
Wherein the fingerprint feature information generating unit generates a fingerprint image by synthesizing the divided region images, and generates the fingerprint feature information from the generated fingerprint image.
The method according to claim 1,
Further comprising a buffer layer laminated on the display circuit board, wherein the buffer layer is formed of a material having a refractive index different from that of the display glass.
A plurality of light emitting elements and a plurality of light detecting elements coupled to the display circuit board;
A fingerprint contact area sensing unit for sensing a contact area when a user's finger touches the display for fingerprint recognition;
And an area dividing section dividing the fingerprint contacting area into a plurality of divided areas based on a total reflection angle range of the plurality of light emitting devices.
A light emitting element controller for controlling the light emitting element to be activated based on the fingerprint contact area and the total reflection angle range of the plurality of light emitting elements;
A photodetector element control unit for controlling a photodetector element to be activated based on the light emitting element to be activated; And
And a fingerprint feature information generation unit that generates fingerprint feature information using the optical information received by the optical detection element,
Wherein the region dividing section sets a region corresponding to a total reflection angle range of each of the plurality of light emitting elements as a divided region, the plurality of divided regions have a donut shape in which a hole is formed at the center, Wherein the plurality of divided regions are set so as to overlap at a predetermined portion so as to be obtained.
A plurality of light emitting elements and a plurality of light detecting elements coupled to the display circuit board;
A fingerprint contact area sensing unit for sensing a contact area when a user's finger touches the display for fingerprint recognition;
An area dividing unit dividing the fingerprint contacting area into a plurality of divided areas based on a total reflection angle range of the plurality of light emitting devices;
A light emitting element controller for controlling a light emitting element to be activated for obtaining a specific divided region image among the plurality of divided regions; And
A fingerprint feature information generation unit that obtains a segment region image from the photodetector elements and generates fingerprint feature information using the obtained segment region images,
Wherein the region dividing section sets a region corresponding to a total reflection angle range of each of the plurality of light emitting elements as a divided region, the plurality of divided regions have a donut shape in which a hole is formed at the center, Wherein the plurality of divided regions are set so as to overlap at a predetermined portion so as to be obtained.
A fingerprint recognition method in a terminal display in which a plurality of light emitting elements and a plurality of light detecting elements are combined on a display circuit board,
(A) detecting a fingerprint contact area when a user's finger touches the display for fingerprint recognition;
(B) controlling a light emitting element to be activated for acquisition of a specific one of the fingerprint contact areas;
(C) controlling a light detecting element to be activated based on a total reflection angle range of the light emitting element to be activated; And
(D) obtaining a segmented region image from the activated photodetecting device and generating fingerprint feature information using the obtained segmented region images,
Wherein the step (c) controls to activate the light detecting elements within the total reflection angle range of the light emitting element to be activated,
Further comprising dividing the fingerprint contact area into a plurality of divided areas based on a total reflection angle range of the plurality of light emitting devices,
Wherein the plurality of divided regions have a donut shape in which a hole is formed at a center, and the plurality of divided regions are set to overlap at a predetermined portion so that a proper fingerprint image is obtained in the hole region.
delete 12. The method of claim 11,
Wherein the step (a) detects the fingerprint contact area using the pressure information of the touch module.
delete 12. The method of claim 11,
Wherein the step (c) activates a single light emitting element having a total reflection characteristic for the specific divided region or a plurality of light emitting elements adjacent to each other.
16. The method of claim 15,
Wherein the step (c) activates a light emitting element corresponding to each of the divided areas in order to acquire the first through Nth divided area images, wherein the step (d) And activating the devices.
12. The method of claim 11,
Wherein the step (d) generates a fingerprint image by synthesizing the divided region images, and generates the fingerprint feature information from the generated fingerprint image.
delete A fingerprint recognition method in a terminal display in which a plurality of light emitting elements and a plurality of light detecting elements are combined on a display circuit board,
(A) detecting a contact area when a user's finger touches the display for fingerprint recognition;
(B) dividing the fingerprint contact area into a plurality of divided areas based on a total reflection angle range of the plurality of light emitting devices;
(C) controlling a light emitting element to be activated for acquiring a specific divided region image among the plurality of divided regions; And
(D) obtaining a segmented region image from the light detecting elements, and generating fingerprint feature information using the obtained segmented regions images,
Wherein the step (b) sets a region corresponding to a total reflection angle range of each of the plurality of light emitting devices as a divided region, the plurality of divided regions have a donut shape in which a hole is formed at the center, Wherein the plurality of divided regions are set so as to overlap each other at a predetermined portion.
A recording medium on which a program for executing the method of any one of claims 11 to 19 is recorded and a program that can be read by a computer is recorded.

Images