WO2007139360A1

WO2007139360A1 - Apparatus for leading user's position of iris recognition system

Info

Publication number: WO2007139360A1
Application number: PCT/KR2007/002656
Authority: WO
Inventors: Bum Chul Kim; Kie Young Lee
Original assignee: Lg Electronics Inc.
Priority date: 2006-06-01
Filing date: 2007-05-31
Publication date: 2007-12-06
Also published as: KR20070115198A; KR100854889B1

Abstract

Provided is a user position leading apparatus of an iris recognition system. The apparatus includes a main mirror and a light emitting unit. The main mirror is viewed by a user to recognize the iris, and the light emitting unit emits light at the surroundings of the edge of the main mirror. Therefore, the user can comfortably view his eyes reflected by the main mirror. The user can naturally recognize whether his position is located at a proper recognition distance through light of the light emitting unit formed at the surroundings of the edge of the main mirror, so that user convenience improves.

Description

APPARATUS FOR LEADING USER S POSITION OF IRIS

RECOGNITION SYSTEM

Technical Field

[1] The present disclosure relates to an iris recognition system.

[2] The iris recognition system is a system for converting a characteristic pattern of the iris obtained from an iris image shot by a video camera into data using image processing technology, and comparing the data with iris data registered in a dictionary to authenticate an individual. Background Art

[3] Fig. 1 is a schematic view illustrating the construction of a general iris recognition system. Referring to Fig. 1, the iris recognition system will be described. When a user approaches to the iris recognition system, a distance measuring sensor 7 measures a distance up to the user, and a control unit 5 receives a measurement value obtained in this manner to judge whether the user is located within an operation range.

[4] When the user is located within the operation range, the control unit 5 transmits a control signal so that an iris image is to be extracted. The control unit 5 transmits an active signal to an outside indicator 6 to inform a user that the system operates. When the user positions his eyes on an optical axis of a camera 3 through an optical window 1, a visible ray region is blocked and only an infrared iris image is transmitted by a main mirror 2. Also, a position on which the iris is to be positioned is marked to allow the user to check whether his eyes is positioned on the optical axis of the camera 3.

[5] Also, the control unit 5 receives a distance measurement value from the distance measuring sensor 7 to the user, and calculates a zoom value and a focus value of the camera 3 (in the case where the camera 3 is an auto zoom focus camera) using the distance measurement value to perform a zoom-in/out control and a focusing control. In the case where the camera 3 is a single focal length camera, an image of the user is immediately taken when the user is properly positioned.

[6] After that, the taken iris image is signal-processed at a frame grabber 4 so that it is suitable for an iris image analysis, and the processed iris image data is stored in a database (DB) 8. The control unit 5 performs iris recognition using the stored data to determine whether the user is authenticated.

[7] A user position leading apparatus in the iris recognition system means an apparatus representing the eyes of the user is positioned at a suitable distance for iris recognition when the user positions his eyes on the optical axis of the camera 3 through the optical window 1. Generally, the system displays the user a mark showing whether a focal length is distant, close, or suitable through an indication character located on the rear portion of the main mirror 2. Then, the user can move to a range in which an iris image of the user is taken by moving according to the displayed mark.

[8] Fig. 2 is a schematic view illustrating the structure of a related art user position leading apparatus, and Fig. 3 is a view illustrating an example of the mark in the related art user position leading apparatus.

[9] Referring to Fig. 2, the user position leading apparatus includes a main mirror 21 a user views for iris recognition, a light emitting unit 22 formed in the rear of the main mirror 21 to emit light, a indication character layer 23 formed on the front side of the light emitting unit 22, and an indication character 24 formed in the indication character layer 23 to transmit light from the light emitting unit 22.

[10] Here, the indication character layer 23 is formed such that only the indication character 24 transmits the light of the light emitting unit 22. Therefore, a portion of the indication character layer 23 that excluding the indication character 24 blocks the light of the light emitting unit 22. Also, the indication character layer 23 and the light emitting unit 22 are provided in the rear of the main mirror 21 to allow the user to view the light of the light emitting unit 22 that has passed through the indication character 24 through the main mirror 21. Also, the light emitting unit 22 includes a plurality of light emitting diodes (LEDs) to emit light so that light is transmitted through the indication character 24 depending on a focal length.

[11] Therefore, as illustrated in Fig. 3, the user views the indication character 24 displayed through the main mirror 21 and moves to a suitable region according to the viewed indication character 24 so that the iris recognition system can obtain an iris image.

[12] However, according to the related art user position leading apparatus, the user should watch the indication character 24 and cannot view comfortably his eyes reflected by the main mirror 21 because the user should recognize the indication character 24 viewed by the light emitting unit 22 when the light emitting unit 22 located behind the indication character layer 23 emits light.

[13] Also, coating for light transmission and reflection should be made on the main mirror 21 so that light of a predetermined wavelength is transmitted and an infrared ray is transmitted for iris recognition of the user to allow the user to recognize light from the light emitting unit 22 through the main mirror 21. The coating requires high manufacturing costs.

[14] Also, since the main mirror 21 transmits only light of a predetermined wavelength and an infrared ray, the eyes of the user is viewed dark when the user views the main mirror 21. Disclosure of Invention

Technical Problem

[15] Embodiments provide a user position leading apparatus of an iris recognition system that allows a user to view only his eyes reflected by a main mirror comfortably by making a light emitting unit emit light at surroundings of an edge of the main mirror and allowing the user to naturally recognize light of the light emitting unit formed at the surroundings of the edge of the main mirror by only atmosphere.

[16] Embodiments also provide a user position leading apparatus of an iris recognition system wherein a main mirror does not need to be coated to transmit light in a predetermined wavelength band required by the system by forming a light emitting unit in an outer side of an edge of the main mirror so that a user can directly recognize light of the light emitting unit. Technical Solution

[17] In one embodiment, a user position leading apparatus of an iris recognition system, the apparatus includes a main mirror viewed by a user to recognize the iris, and a light emitting unit for emitting light at a portion adjacent to an edge of the main mirror.

[18] In another embodiment, a user position leading apparatus of an iris recognition system, the apparatus includes a main mirror viewed by a user to recognize the iris, and a light emitting unit for emitting light at a portion separated to an outside a predetermined distance from an edge of the main mirror.

[19] According to a proposed disclosure, a user position leading apparatus of an iris recognition system allows a user to naturally recognize the iris merely with an atmosphere. Therefore, the user can view the main mirror comfortably and manufacturing costs of the main mirror can be reduced.

Advantageous Effects

[20] According to a user position leading apparatus of an iris recognition system having the above-described construction, the light emitting unit is allowed to emit light at surroundings of an edge of the main mirror, so that the user can naturally recognize light of the light emitting unit merely with an atmosphere while viewing only his own eyes reflected by the main mirror. Therefore, user convenience is improved.

[21] Also, the light emitting unit is allowed to emit light at an outer side of the edge of the main mirror so that the user can directly recognize light of the light emitting unit. Therefore, the main mirror does not need to be coated to transmit light in a predetermined wavelength band required by the system, and manufacturing costs are reduced. Brief Description of the Drawings

[22] Fig. 1 is a view illustrating the construction of a general iris recognition system. [23] Fig. 2 is a schematic view illustrating the construction of a user position leading apparatus of an iris recognition system according to a related art. [24] Fig. 3 is a view illustrating an example of a distance display in a user position leading apparatus of an iris recognition system according to a related art. [25] Figs. 4 and 5 are a schematic front view and a schematic cross-sectional view of a first embodiment of a user position leading apparatus of an iris recognition system according to the present disclosure, respectively. [26] Figs. 6 and 7 are a schematic front view and a schematic cross-sectional view of a second embodiment according to the present disclosure, respectively. [27] Fig. 8 is a schematic front view of a third embodiment according to the present disclosure.

[28] Fig. 9 is a schematic cross-sectional view taken along a line I-I' of Fig. 8.

[29] Figs. 10 and 11 are a schematic front view and a schematic cross-sectional view of a fourth embodiment according to the present disclosure, respectively. [30] Fig. 12 is a schematic front view of a fifth embodiment according to the present disclosure.

[31] Fig. 13 is a schematic cross-sectional view taken along a line II- II' of Fig. 12.

[32] Fig. 14 is a schematic cross-sectional view taken along a line III-III' of Fig. 12.

[33] Figs. 15 and 16 are a schematic front view and a schematic cross-sectional view of a sixth embodiment according to the present disclosure, respectively. [34] Figs. 17 and 18 are a schematic front view and a schematic cross-sectional view of a seventh embodiment according to the present disclosure, respectively. [35] Figs. 19 and 20 are a schematic front view and a schematic cross-sectional view of an eighth embodiment according to the present disclosure, respectively. [36] Figs. 21 and 22 are a schematic front view and a schematic cross-sectional view of a ninth embodiment according to the present disclosure, respectively. [37] Figs. 23 and 24 are a schematic front view and a schematic cross-sectional view of a tenth embodiment according to the present disclosure, respectively. [38] Fig. 25 is a schematic front view of an eleventh embodiment according to the present disclosure.

[39] Fig. 26 is a schematic cross-sectional view taken along a line VI-VI' of fig. 25.

[40] Figs. 27 and 29 are schematic front views of a twelfth embodiment according to the present disclosure, respectively.

[41] Fig. 28 is a schematic cross-sectional view taken along a line V-V of Fig. 27.

[42] Fig. 30 is a schematic cross-sectional view taken along a line VI-VI' of Fig. 29.

Best Mode for Carrying Out the Invention [43] Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. However, the present disclosure is not limited to the embodiments thereof, and a person of ordinary skill in the art would easily propose other embodiment by adding, modifying, and deleting of elements, which falls within the scope of the present disclosure.

[44] Figs. 4 and 5 are a schematic front view and a schematic cross-sectional view of a first embodiment of a user position leading apparatus of an iris recognition system according to the present disclosure, respectively.

[45] Referring to Figs. 4 and 5, the user position leading apparatus of an iris recognition system includes: a case 30 forming an appearance of the iris recognition system; a main mirror 31 forming the appearance together with the case 30 and viewed by a user to recognize the iris; and a light emitting unit 32 for emitting light at a portion adjacent to an edge of the main mirror 31. Also, the light emitting unit 32 is formed to surround the main mirror 31 and emit light at the outer side of the edge of the main mirror 31.

[46] In detail, the light emitting unit 32 emits or does not emit light depending on whether a user is positioned at a proper focal length or not. For example, when the user is not positioned within a proper focal length, the light emitting unit 32 is allowed to emit light.

[47] Therefore, the user can naturally recognize light emitted and surrounding the main mirror 31 at the outer side of the edge merely with an atmosphere while viewing only his own eyes reflected by the main mirror 31, and accordingly, the user can move to a proper focal length. By doing so, inconvenience that the user should view an indication character formed in the main mirror 31 is removed, so that user convenience can be enhanced.

[48] Also, since light of the light emitting unit 32 is emitted from the outer side of the edge of the main mirror 31, the user can directly recognize light of the light emitting unit 32. Therefore, the main mirror 31 does not need to be coated to transmit light in a predetermined wavelength band required by the system to allow the user to recognize light of the light emitting unit 32 through the main mirror 31.

[49] Further, any device such as a light emitting diode (LED), an electro-luminescent

(EL) sheet, and a lamp can be used as the light emitting unit 32 as far as it emits light. The light emitting unit 32 may emit light while taking on color or may emit light at different brightness so that the user can easily recognize the light. Mode for the Invention

[50] Figs. 6 and 7 are a schematic front view and a schematic cross-sectional view of a second embodiment according to the present disclosure, respectively.

[51] Since the second embodiment is different from the first embodiment only in the light emitting unit, descriptions of other parts will be omitted. [52] Referring to Figs. 6 and 7, the second embodiment includes a first light emitting unit 42 contacting all of an edge of a main mirror 41, and emitting light to surround the main mirror 41, and a second light emitting unit 43 for emitting light to surround an edge of the first light emitting unit 42. Since light emitted from the first and second light emitting units 42 and 43 emits light at the outer side of the edge, a user can recognize the light of the first and second light emitting units 42 and 43. By doing so, a variety of methods for displaying whether a focal length is proper can be provided to the user.

[53] In detail, the first light emitting unit 42 can be allowed to emit light when the user is closer than a proper focal length, and the second light emitting unit 43 can be allowed to emit light when the user is away from the proper focal length. Also, the second light emitting unit 43 can be allowed to emit light when the user is closer than or away from the proper focal length, and the first light emitting unit 42 can be allowed to emit light when the user is positioned within the proper focal length.

[54] Therefore, the user can naturally recognize light of the first and second light emitting units 42 and 43 emitted and surrounding the main mirror 41 through an atmosphere by viewing only his own eyes reflected by the main mirror 41. Accordingly, the user can swiftly move to the proper focal distance.

[55] The first and second light emitting units 42 and 43 can emit light to take on different colors, or be formed to emit light at different brightness. This is for allowing the user to easily discriminate light emitted from the first light emitting unit 42 and light emitted from the second light emitting unit 43.

[56] Fig. 8 is a schematic front view of a third embodiment according to the present disclosure, and Fig. 9 is a schematic cross-sectional view taken along a line I-I'of Fig. 8.

[57] Since the third embodiment is different from the first embodiment only in the light emitting unit, descriptions of other parts will be omitted.

[58] Referring to Figs. 8 and 9, the third embodiment includes a first light emitting unit

52 and a second light emitting unit 53 for emitting light at portions contacting the left and right edges of a main mirror 31, respectively. Also, the first and second light emitting units 52 and 53 are formed to emit light at the outer side of the edges.

[59] Therefore, a user can naturally recognize light emitted from the right and left edges of the main mirror 51 merely with an atmosphere by viewing only his own eyes reflected by the main mirror 51, and approach closer or away to the rear side according to the emitted light.

[60] Figs. 10 and 11 are a schematic front view and a schematic cross-sectional view of a fourth embodiment according to the present disclosure, respectively.

[61] Since the fourth embodiment is different from the first embodiment only in the light emitting unit, descriptions of other parts will be omitted.

[62] Referring to Figs. 10 and 11, the fourth embodiment includes a first light emitting unit 62 and a second light emitting unit 63 for emitting light at portions contacting upper and lower edges of a main mirror 61, respectively. Also, the first and second light emitting units 62 and 63 are formed to emit light at the outer sides of the edges.

[63] Therefore, a user can recognize light emitted from the upper and lower edges of the main mirror 61 merely with an atmosphere by viewing only his own eyes reflected by the main mirror 61, and naturally know whether himself is positioned closer to or distant away from a focal length.

[64] Fig. 12 is a schematic front view of a fifth embodiment according to the present disclosure, Fig. 13 is a schematic cross-sectional view taken along a line II- II' of Fig. 12, and Fig. 14 is a schematic cross-sectional view taken along a line III- III' of Fig. 12.

[65] Since the fifth embodiment is different from the first embodiment only in the light emitting unit, descriptions of other parts will be omitted.

[66] Referring to Figs. 12, 13, and 14, the fifth embodiment includes a first light emitting unit 72 and a second light emitting unit 73 for emitting light at portions contacting upper and lower edges of a main mirror 71, a third light emitting unit 74 and a fourth light emitting units 75 for emitting light at portions contacting left and right edges of the main mirror 71. Also, the first to fourth light emitting units 72, 73, 74, and 75 are formed to emit light at the outer sides of the edges. By doing so, a user is allowed to easily recognize a focal length indication, or a focal length indication method can be provided to the user in various ways.

[67] In detail, the first and second light emitting units 72 and 73 are allowed to emit light when the user is positioned distant away from a focal length. The third and fourth light emitting units 74 and 75 are allowed to emit light when the user is positioned closer to the focal length. The user can easily recognize light emitted simultaneously at portions on and under the main mirror 71 when the user is positioned distant away from the focal length, and can easily recognize light emitted simultaneously at left and right sides of the main mirror 71 when the user is positioned closer to the focal length by viewing only the main mirror 71.

[68] That is, the user can naturally recognize light of the first and second light emitting units 72 and 73 emitted simultaneously at the upper and lower edges of the main mirror 71, and light of the third and fourth light emitting units 74 and 75 emitted simultaneously at the left and right edges of the main mirror 71 merely with an atmosphere.

[69] Further, diversity in a displaying method can be provided by subdividing a degree by which the user is positioned closer than or distant away from the focal length. That is, the first light emitting unit 72 can be allowed to emit light when the user is positioned very far away from the focal length, the second light emitting unit 73 can be allowed to emit light when the user is positioned a little far away from the focal length, the third light emitting unit 74 can be allowed to emit light when the user is positioned very closer than the focal length, and the fourth light emitting unit 75 can be allowed to emit light when the user is positioned a little closer than the focal length. By doing so, the user can know the degree by which he should come close to or go away from the focal length, so that the user can more easily move to the focal length.

[70] Further, not only the case where the position of the user is closer than the focal length, but also the case where the position of the user deviates to the left or right from the focal length can be displayed. That is, the first light emitting unit 72 can be allowed to emit light when the user is distant away from the focal length, the second light emitting unit 73 can be allowed to emit light when the user is positioned closer than the focal length, the third light emitting unit 74 can be allowed to emit light when the user deviates to the right, and the fourth light emitting unit 75 can be allowed to emit light when the user deviates to the left. By doing so, the user can easily move to the front when recognizing the first light emitting unit 72, move to the rear when recognizing the second light emitting unit 73, move to the left when recognizing the third light emitting unit 74, and move to the right when recognizing the fourth light emitting unit 75. Therefore, the user can easily move to an accurate focal length.

[71] Figs. 15 and 16 are a schematic front view and a schematic cross-sectional view of a sixth embodiment according to the present disclosure, respectively.

[72] Since the sixth embodiment is different from the first embodiment only in the main mirror and the light emitting unit, descriptions of other parts will be omitted.

[73] Referring to Figs. 15 and 16, the sixth embodiment includes a main mirror 81 viewed by a user to recognize the iris, a first light emitting unit 82 contacting an edge of the main mirror 81 and emitting light at an outer portion, and a second light emitting unit 83 contacting an edge of the main mirror 81 and emitting light at an inner portion.

[74] In the sixth embodiment, a portion corresponding to the front of the second light emitting unit 83, that is, a predetermined inner portion of the edge of the main mirror 81 is coated to transmit light in a wavelength band emitted from the second light emitting unit 83. By doing so, the user not only can directly recognize light emitted from the first light emitting unit 82, but also can recognize light emitted from the second light emitting unit 83 through the coated portion of the main mirror 81.

[75] Therefore, the user can naturally recognize light of the first and second light emitting units 82 and 83 emitted from the surroundings of the edge of the main mirror 81 merely with an atmosphere by viewing only his own eyes reflected by the main mirror 81 to recognize whether the position of the user is closer than or distant away from the focal length. Also, the portion of the main mirror 81 coated to transmit light in a predetermined wavelength band is reduced, so that manufacturing costs can be reduced. [76] Figs. 17 and 18 are a schematic front view and a schematic cross-sectional view of a seventh embodiment according to the present disclosure, respectively. [77] Since the seventh embodiment is different from the first embodiment only in the main mirror and the light emitting unit, descriptions of other parts will be omitted. [78] Referring to Figs. 17 and 18, the seventh embodiment includes a main mirror 91 viewed by a user to recognize the iris, and a light emitting unit 92 contacting an edge of the main mirror 91 and emitting light in an inside. [79] In the seventh embodiment, a portion corresponding to the front of the light emitting unit 92, that is, a predetermined inner portion of the edge of the main mirror

91 is coated to transmit light in a wavelength band emitted from the light emitting unit

92. By doing so, the user can recognize light emitted from the light emitting unit 92 through the coated portion of the main mirror 91. [80] Therefore, the user can naturally recognize light of the light emitting unit 92 emitted at the surroundings of the edge of the main mirror 91 merely with an atmosphere by viewing only his own eyes reflected by the main mirror 91. Also, the coated portion of the main mirror 91 reduces, so that manufacturing costs can reduce. [81] Figs. 19 and 20 are a schematic front view and a schematic cross-sectional view of an eighth embodiment according to the present disclosure, respectively. [82] Since the eighth embodiment is different from the first embodiment only in the main mirror and the light emitting unit, descriptions of other parts will be omitted. [83] Referring to Figs. 19 and 20, the eighth embodiment includes a main mirror 101 viewed by a user to recognize the iris, and a light emitting unit 102 contacting an edge of the main mirror 101 and formed to emit light in an entire inner portion of the main mirror 101. [84] In the eighth embodiment, the main mirror 101 is coated to transmit light in a wavelength band that is emitted from the light emitting unit 102. By doing so, the user can recognize light emitted from the light emitting unit 102 through the main mirror

101. [85] Therefore, since the user can naturally recognize light emitted from the entire inner portion of the main mirror 101 by viewing only his own eyes reflected by the main mirror 101 when the light emitting unit 102 emits light, the user can easily recognize whether the position of the user is closer than or distant away from a focal length. [86] Figs. 21 and 22 are a schematic front view and a schematic cross-sectional view of a ninth embodiment according to the present disclosure, respectively. [87] Since the ninth embodiment is different from the first embodiment only in the main mirror and the light emitting unit, descriptions of other parts will be omitted. [88] Referring to Figs. 21 and 22, the ninth embodiment includes a main mirror 111 viewed by a user to recognize the iris, and a light emitting unit 112 simultaneously contacting the left and right edges of the main mirror 111 and formed to have a predetermined thickness.

[89] Therefore, the user can easily recognize light of the light emitting unit 112 crossing the inner center of the main mirror 111 at a predetermined thickness by viewing only his own eyes reflected by the main mirror 111. Also, since a portion of the main mirror 111 that is coated to transmit light in a predetermined wavelength band reduces, manufacturing costs reduce.

[90] Figs. 23 and 24 are a schematic front view and a schematic cross-sectional view of a tenth embodiment according to the present disclosure, respectively.

[91] Since the tenth embodiment is different from the first embodiment only in the main mirror and the light emitting unit, descriptions of other parts will be omitted.

[92] Referring to Figs. 23 and 24, the tenth embodiment includes a first light emitting unit 122 separated from an edge of a main mirror 121 to an outside by a predetermined distance to emit light to surround the main mirror 121, and a second light emitting unit 123 for emitting light to surround an edge of the first light emitting unit 122. The distance between the first and second light emitting units 122 and 123 and the edge of the main mirror 121 is limited to a range within which a user can naturally recognize light of the first and second light emitting units 122 and 123 while viewing only his own eyes reflected by the main mirror 121.

[93] Therefore, the user can naturally recognize light of the first and second light emitting units 122 and 123 merely with an atmosphere by viewing only his own eyes reflected by the main mirror 121.

[94] Fig. 25 is a schematic front view of an eleventh embodiment according to the present disclosure, and Fig. 26 is a schematic cross-sectional view taken along a line IV-IV¹ of Fig. 25.

[95] Referring to Figs. 25 and 26, the eleventh embodiment includes a case 130 forming an appearance of an iris recognition system, a main mirror 131 forming the appearance together with the case 130 and viewed by a user to recognize the iris, light emitting units 132 formed at rear lateral sides of the main mirror 131, respectively, to emit light, a light guide plate 133 for receiving light from the light emitting unit 132 to allow the light to be concentrated on the center of the main mirror 131, and housings 134 for allowing the light of the light emitting unit 132 to be concentrated on the light guide plate 123.

[96] The light guide plate 123 is a part for providing uniform brightness and lighting of a back light unit (BLU). The light guide plate 123 means an acryl injected part assembled inside the back light unit guiding light to liquid crystals in a liquid crystal display device. That is, the light guide plate 123 is a kind of plastic molded lens uniformly delivering light diverging from Cold Cathode Fluorescent Lamps (CCFLs) to an entire surface of the liquid crystal display device.

[97] In the eleventh embodiment, the light guide plate 133 having the shape shown in

Fig. 26 is used and the principle of an original light guide plate is reversely applied to allow light to be concentrated on the center of the main mirror 131.

[98] Also, in the eleventh embodiment, the main mirror 101 is coated to transmit light in a predetermined wavelength band that is emitted from the light emitting unit 132. By doing so, the user can recognize light emitted from the light emitting unit 132 through the main mirror 101.

[99] In detail, in the case where the light emitting unit 132 is allowed to emit light when the position of the user is close to or distant away from a focal length, the center of the main mirror 121 is particularly brightened by the light guide plate 123. Accordingly, the user can easily recognize the light emitted from the light emitting unit 132 by viewing only the main mirror 121.

[100] Therefore, the user can easily recognize whether his position is proper merely with an atmosphere by viewing only his eyes reflected by the main mirror 121. That is, since the center is brightened even more than the entire main mirror 121, the user can easily recognize the light.

[101] Figs. 27 and 29 are schematic front views of a twelfth embodiment according to the present disclosure, respectively, Fig. 28 is a schematic cross-sectional view taken along a line V-V of Fig. 27, and Fig. 30 is a schematic cross-sectional view taken along a line VI-VI¹ of Fig. 29.

[102] Since the twelfth embodiment is different from the eleventh embodiment only in the light emitting unit and the light guide plate, descriptions of other parts will be omitted.

[103] Referring to Figs. 27 to 30, the twelfth embodiment includes a main mirror 141, a first light emitting unit 142 and a second light emitting unit 143 formed at rear lateral sides of the main mirror 141, respectively, to emit light depending on the position of a user, a light guide plate 144 for allowing light received from the first and second light emitting units 142 and 143 to be illuminated onto the main mirror 141 at different brightness, and housings 145 for allowing light received from the first and second light emitting units 142 and 143 to be concentrated on the light guide plate 134.

[104] In detail, referring to Figs. 27 and 28, when only the first light emitting unit 142 emits light, brightness of light is gradually decreased from the left to the right of the main mirror 141 by the light guide plate 144. At this point, the user can easily recognize that light dims down from the right to the left of the main mirror 141.

[105] Also, referring to Figs. 29 and 30, when only the second light emitting unit 143 emits light, brightness of light is gradually decreased from the right to the left of the main mirror 141 by the light guide plate 144. At this point, the user can easily recognize that light dims down from the left to the right of the main mirror 141.

[106] Therefore, the user can easily recognize a brightness change in light depending on whether the first light emitting unit 142 emits light or the second light emitting unit 143 emits light. Accordingly, the user can easily recognize whether his position is proper merely with an atmosphere.

[107] In the eleventh and twelfth embodiments, the principle of a light guide plate has been reversely applied to change brightness of light, but these embodiments are mere examples. Any method that allows a user to recognize different brightness of light can be included in the embodiment.

Claims

[I] A user position leading apparatus of an iris recognition system, the apparatus comprising: a main mirror viewed by a user to recognize the iris; and a light emitting unit for emitting light at a portion adjacent to an edge of the main mirror. [2] The apparatus according to claim 1, wherein the light emitting unit emits light at a portion contacting an entire portion of the edge. [3] The apparatus according to claim 1, wherein the light emitting unit emits light so that the user recognizes the light at an outer side of the edge. [4] The apparatus according to claim 1, wherein the light emitting unit emits light so that the user recognizes the light at an inner side of the edge. [5] The apparatus according to claim 1, wherein the light emitting unit emits light so that the user recognizes the light at an entire inner portion of the main mirror. [6] The apparatus according to claim 1, wherein the light emitting unit crosses the main mirror and emits light at a predetermined thickness. [7] The apparatus according to claim 1, wherein the light emitting unit emits light at a portion overlapping a portion of the edge. [8] A user position leading apparatus of an iris recognition system, the apparatus comprising: a main mirror viewed by a user to recognize the iris; and a light emitting unit for emitting light at a portion separated to an outside by a predetermined distance from an edge of the main mirror. [9] The apparatus according to claim 8, wherein the light emitting unit emits light such that the light surrounds the main mirror. [10] The apparatus according to claim 1 or 8, wherein brightness of light emitted from the light emitting unit is made different to allow the user to recognize the brightness differently.

[I I] The apparatus according to claim 1 or 8, wherein a plurality of light emitting units are provided, and the plurality of light emitting units emit light in different colors or different brightness.