CN212675541U - Contactless optical password input device and automatic teller machine - Google Patents
Contactless optical password input device and automatic teller machine Download PDFInfo
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- CN212675541U CN212675541U CN202021734266.6U CN202021734266U CN212675541U CN 212675541 U CN212675541 U CN 212675541U CN 202021734266 U CN202021734266 U CN 202021734266U CN 212675541 U CN212675541 U CN 212675541U
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Abstract
The utility model discloses a contactless optics password input device and ATM, ATM includes the casing, and contactless optics password input device includes: the display is arranged in the shell; the display is arranged on one side of the equivalent negative refractive index optical element, and a floating real image of a password input interface of the automatic teller machine opposite to the display is formed on the other side of the equivalent negative refractive index optical element; an optical sensor for detecting user manipulation of the floating real image. According to the utility model discloses a contactless optics password input device for ATM is favorable to preventing that other personnel from peeping the password input interface, can not leave the fingerprint simultaneously, protects user's privacy.
Description
Technical Field
The utility model relates to an automatic teller machine technical field especially relates to a contactless optical code input device and automatic teller machine.
Background
In the related art, the password input interface on the atm of the bank is generally exposed and is input by physical keys, so that lawless persons can take the machine, and the lawless persons can peep the password input interface or crack the fingerprint input sequence information left on the keys to steal the bank card password and cause economic loss to people, so that how to prevent other people from peeping the password input interface and having no fingerprint residue is a technical problem that needs to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a contactless optics password input device for ATM is favorable to preventing that other personnel from peeping the password input interface, and contactless does not keep the fingerprint, protects user's privacy information.
The utility model also provides an ATM of having above-mentioned contactless optics password input device for ATM.
According to the utility model discloses a contactless optical password input device for automatic teller machine of first aspect, automatic teller machine includes the casing, a contactless optical password input device for automatic teller machine includes: the display is arranged in the shell; the display is arranged on one side of the equivalent negative refractive index optical element, and a floating real image of a password input interface of the automatic teller machine opposite to the display is formed on the other side of the equivalent negative refractive index optical element; an optical sensor for detecting user manipulation of the floating real image.
According to the utility model discloses a contactless optics password input device for ATM, equivalence negative refractive index optical element can form images the real image of the password input interface of ATM in order to form in the air of equivalence negative refractive index optical element's the opposite side with the light that the display sent, only can see the real image of ATM's password input interface apart from the real image within the certain distance of password input interface the people to can be favorable to preventing that other personnel from peeping the password input interface, can not leave the fingerprint simultaneously, protect user's privacy information.
In some embodiments of the present invention, the equivalent negative refractive index optical element comprises: the optical waveguide array comprises a first optical waveguide array and a second optical waveguide array which are formed by laminating a plurality of reflecting units, wherein the first optical waveguide array and the second optical waveguide array are tightly attached to each other on the same plane and are orthogonally arranged.
In some embodiments of the present invention, the cross section of the reflection unit is rectangular, and a reflection film is disposed on the same side or both sides of the stacking direction of the reflection unit.
In some embodiments of the present invention, the reflection unit has a width and a length of a cross section, and satisfies: a is more than 0.2mm and less than 5mm, and b is more than 0.2mm and less than 5 mm.
In some embodiments of the present invention, the first optical waveguide array or the second optical waveguide array is composed of a plurality of parallel arranged reflection units arranged obliquely at 45 °.
In some embodiments of the present invention, the waveguide directions of the mutually corresponding portions of the first optical waveguide array and the second optical waveguide array are perpendicular to each other, and the first optical waveguide array and the second optical waveguide array are orthogonally arranged.
In some embodiments of the present invention, the equivalent negative refractive index optical element further comprises two transparent substrates, and the first optical waveguide array and the second optical waveguide array are disposed between the two transparent substrates.
In some embodiments of the present invention, the equivalent negative refractive index optical element further comprises an anti-reflection component and a viewing angle control component, the anti-reflection component and the viewing angle control component being disposed between the first optical waveguide array and the second optical waveguide array; or the anti-reflection component and the visual angle control component are arranged between the transparent substrate and the first optical waveguide array; or the antireflection member and the viewing angle control member are disposed between the transparent substrate and the second optical waveguide array.
In some embodiments of the present invention, the first optical waveguide array and the second optical waveguide array are arranged in parallel, and the first optical waveguide array and the second optical waveguide array are arranged in parallel.
In some embodiments of the present invention, the contactless optical password input apparatus further includes: the total reflector is arranged on one side of the equivalent negative refractive index optical element and arranged on the same side of the display so as to reflect light rays emitted by the display to the equivalent negative refractive index optical element.
In some embodiments of the present invention, the equivalent negative refractive index optical element comprises: a retro-reflector and a beam splitter, the retro-reflector and the display being located on a same side of the beam splitter and the beam splitter reflecting light from the display to the retro-reflector, the beam splitter transmitting light from the retro-reflector.
In some embodiments of the invention, the surface of the retro reflector is provided with 1/4 wave plates.
In some embodiments of the present invention, the optical sensor is a far-near infrared sensor, an ultrasonic sensor, a laser interference sensor, a grating sensor, an encoder, an optical fiber sensor, or a CCD sensor.
The automatic teller machine of the utility model comprises a shell and the contactless optical password input device used for the automatic teller machine.
In some embodiments of the present invention, the automatic teller machine further comprises: the controller host is arranged in the shell and connected with the display and the optical sensor in a wired or wireless mode to transmit digital or analog signals.
In some embodiments of the present invention, the front panel of the housing has a mounting groove, and the equivalent negative refractive index optical element is disposed in the mounting groove.
In some embodiments of the present invention, the inner sidewall of the mounting groove has a locking hole, and the sidewall of the equivalent negative refractive index optical element has a hook engaged with the locking hole.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of an atm according to an embodiment of the present invention;
fig. 2 is a block diagram of a control system of a contactless optical password input apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a contactless optical password input apparatus according to a first embodiment of the present invention;
fig. 4 is a schematic diagram of a man-machine interaction structure of a contactless optical password input apparatus according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of a flat lens according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a first optical waveguide array and a second optical waveguide array according to an embodiment of the present invention;
fig. 7 is a schematic front view of a flat lens according to an embodiment of the present invention in the thickness direction;
fig. 8 is a schematic partial structural view of a first optical waveguide array and a second optical waveguide array according to an embodiment of the present invention;
fig. 9 is a schematic optical path diagram of a flat lens according to an embodiment of the present invention;
fig. 10 is an internal optical path schematic diagram of a plate lens according to an embodiment of the present invention;
fig. 11 is an imaging schematic diagram of a flat lens according to an embodiment of the present invention;
fig. 12 is a schematic structural view of a contactless optical password input apparatus with a total reflection mirror added according to a second embodiment of the present invention;
fig. 13 is a schematic structural diagram of a contactless optical password input apparatus according to a third embodiment of the present invention.
Reference numerals:
an automated teller machine (1000) having a cash dispenser,
the non-contact optical password input apparatus 100,
a flat lens 1, a display 2, an optical sensor 3, a floating real image 4, a controller host 5,
a first optical waveguide array 6, a second optical waveguide array 7, a transparent substrate 8,
a reflection unit 9, a reflection film 10, a photosensitive adhesive 11,
a housing 20, an external device 30.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
[ first embodiment ] A method for manufacturing a semiconductor device
A contactless optical password input device 100 for an automatic teller machine 1000 according to an embodiment of the present invention will be described below with reference to the accompanying drawings. An atm is also called an automatic Teller machine (atm), and means an atm. The device is a highly precise electromechanical integrated device, can realize self-service of financial transactions, and replaces the work of bank counter personnel. The work of withdrawing cash, inquiring deposit balance, transferring funds among accounts, inquiring balance and the like can be carried out; it is also possible to perform cash deposit (real-time entry), passbook subsidy, intermediate business, etc. The card holder can use credit card or deposit card to transact services such as automatic withdrawal, balance inquiry, account transfer, cash deposit, bankbook registration, fund purchase, password change, mobile phone charge payment and the like according to the password.
As shown in fig. 1, according to the contactless optical password input device 100 for the automatic teller machine 1000 of the first aspect of the present invention, the automatic teller machine 1000 includes a housing 20, and the contactless optical password input device 100 for the automatic teller machine 1000 includes an equivalent negative refractive index optical element, a display 2 and an optical sensor 3, and it can be understood that the display 2 and the optical sensor 3 both have signal transmission with the controller host 5 of the automatic teller machine 1000.
The equivalent negative refractive index optical element is arranged in the cabinet 20, the equivalent negative refractive index optical element comprises a flat lens 1, a display 2 is arranged in the cabinet 20, the display 2 is positioned at one side of the flat lens 1 far away from a user, and fig. 2 is a block diagram of a control system of the automatic teller machine 1000. The contactless optical password input device 100 is provided with a controller host 5, an optical sensor 3 and a display 2, the controller host 5 in the contactless optical password input device 100 is electrically connected with the optical sensor 3 and the display 2, and a driving circuit and related input and output interfaces of the devices are also included, which are omitted in the figure.
The optical sensor 3 periodically detects the interactive operation of the user, including clicking, sliding and the like, and transmits the interactive information to the controller host 5, the controller host 5 judges the specific operation content of the user, such as information query, password input and the like, according to the internal instruction set, and simultaneously transmits the UI operation interface of the relevant control buttons, information, settings and the like to the display 2 for image display.
In addition, the controller host 5 may be directly integrated with the display 2 or placed outside the contactless optical password input apparatus 100. The control command content may also be transmitted to the external device 30 for processing or controlling the external device 30, such as checking bills, printing receipts, etc.
Therefore, light rays emitted by an image displayed by the display 2 are converged and imaged again at the same position of the other side of the equivalent negative refractive index optical element after passing through the equivalent negative refractive index optical element, so that a floating real image 4 symmetrical to the optical waveguide is formed on the other side of the equivalent negative refractive index optical element, the floating real image 4 shows a password input interface of the automatic teller machine, the optical sensor 3 is used for detecting the operation of a user on the floating real image 4, and the optical sensor 3 is used for feeding back detected operation signals to the controller host 5.
The flat lens 1 may include a first optical waveguide array 6 and a second optical waveguide array 7 formed by stacking a plurality of reflection units, the first optical waveguide array 6 and the second optical waveguide array 7 are closely attached to each other on the same plane and orthogonally arranged, the display 2 is placed on one side of the flat lens 1, and the floating real image 4 opposite to the display 2 is formed on the other side of the flat lens 1.
As shown in fig. 5 and 6, the flat lens 1 includes two transparent substrates 8, and a first optical waveguide array 6 and a second optical waveguide array 7 interposed between the two transparent substrates 8, wherein the first optical waveguide array 6 and the second optical waveguide array 7 have the same thickness. Specifically, as shown in fig. 5, the flat lens 1 includes a first transparent substrate 8, a first optical waveguide array 6, a second optical waveguide array 7, and a second glass substrate 8 in this order from the display 2 side to the floating real image 4 side. The first transparent substrate 8 and the second transparent substrate 8 each have two optical surfaces, the transparent substrate 8 has a transmittance of about 90% to about 100% at a wavelength of about 390nm to about 760nm, and the transparent substrate 8 material includes at least one of glass, plastic, polymer, and acrylic for protecting the optical waveguide array and filtering out unnecessary light. Note that, if the strength after the first optical waveguide array 6 and the second optical waveguide array 7 are bonded to each other in an orthogonal manner is sufficient, or if the thickness of the mounting environment is limited, only one transparent substrate 8 may be disposed, or no transparent substrate 8 may be disposed.
The first optical waveguide array 6 and the second optical waveguide array 7 are composed of a plurality of reflecting units 9 with rectangular cross sections, and the length of each reflecting unit 9 is limited by the peripheral size of the optical waveguide array, so that the lengths are different. As shown in fig. 6, the extending direction of the reflecting unit 9 in the first optical waveguide array 6 is X, the extending direction of the reflecting unit 9 in the second optical waveguide array 7 is Y, and the Z direction is the thickness direction of the optical waveguide array. The extending directions (waveguide directions) of the reflecting units 9 in the first optical waveguide array 6 and the second optical waveguide array 7 are mutually perpendicular, namely, the first optical waveguide array 6 and the second optical waveguide array 7 are orthogonally arranged when viewed from the Z direction (thickness direction), so that light beams in two orthogonal directions are converged at one point, and an object image surface is ensured to be symmetrical relative to the flat lens with the equivalent negative refractive index, the phenomenon of the equivalent negative refractive index is generated, and aerial imaging is realized.
As shown in fig. 7, the first optical waveguide array 6 or the second optical waveguide array 7 is composed of a plurality of parallel arranged reflection units 9 obliquely arranged with being deflected by 45 ° at the user viewing angle. Specifically, the first optical waveguide array 6 may be composed of reflection units 9 arranged side by side at 45 ° in the lower left direction and having a rectangular cross section, the second optical waveguide array 7 may be composed of reflection units 9 arranged side by side at 45 ° in the lower right direction and having a rectangular cross section, and the arrangement directions of the reflection units 9 in the two optical waveguide arrays may be interchanged. The optical waveguide material has an optical refractive index n1, n1> 1.4.
Two interfaces exist between each reflection unit 9 and its adjacent reflection unit 9, as shown in fig. 8, each interface is bonded by photosensitive glue 11 or thermosetting glue, the glue thickness is T1, and T1>0.001 mm. Photosensitive adhesives 11 are arranged between the first optical waveguide array 6 and the second optical waveguide array 7 which are adjacent in the flat lens 1, between the first optical waveguide array 6 and the transparent substrate 8, and between the second optical waveguide array 7 and the transparent substrate 8.
The cross section of the reflection unit 9 is rectangular, and the reflection film 10 is provided on the same side or both sides in the lamination direction of the reflection unit 9. Specifically, in the optical waveguide arrangement direction, the two sides of each reflection unit 9 are plated with the reflection film 10, and the material of the reflection film 10 may be a metal material such as aluminum, silver, or other non-metal compound material that realizes total reflection. The reflecting film 10 is used for preventing light from entering an adjacent optical waveguide due to no total reflection to form stray light to influence imaging. A dielectric film may be added to the reflective film 10 to improve the light reflectance.
The cross-sectional width a and the cross-sectional length b of the single reflection unit 9 satisfy 0.1mm < a <5mm, 0.1mm < b <5 mm. When a large screen is displayed, the requirement of large size can be realized by splicing a plurality of optical waveguide arrays. The overall shape of the optical waveguide array is set according to the application scene, in this embodiment, the two groups of optical waveguide arrays are integrally rectangular, the reflection units 9 at two opposite corners are triangular, the reflection unit 9 in the middle is trapezoidal, the lengths of the single reflection units 9 are different, the reflection unit 9 at the diagonal of the rectangle has the longest length, and the reflection units 9 at the two ends have the shortest length.
In addition, the flat lens 1 further includes an anti-reflection component and a viewing angle control component (not shown), the anti-reflection component can improve the overall transmittance of the flat lens 1, improve the definition and brightness of the floating real image 4, the viewing angle control component can be used for eliminating the afterimage of the floating real image 4, reduce the pattern vertigo, and simultaneously prevent an observer from peeping into the contactless optical password input device 100 from other angles, so as to improve the overall appearance of the device. The anti-reflection component and the visual angle control component can be combined or can be respectively and independently arranged between the transparent substrate 8 and the waveguide array, between two waveguide arrays or on the outer layer of the transparent substrate 8. That is, the antireflection member and the viewing angle control member are provided between the first optical waveguide array 6 and the second optical waveguide array 7; or the anti-reflection component and the visual angle control component are arranged between the transparent substrate 8 and the first optical waveguide array 6; or an antireflection member and a viewing angle control member are provided between the transparent substrate 8 and the second optical waveguide array 7.
Specifically, as shown in fig. 9 to 11, the imaging principle of the flat lens of the present invention is as follows:
on the micrometer structure, a double-layer waveguide array structure which is orthogonal to each other is used for orthogonal decomposition of any optical signal, an original signal is decomposed into two paths of orthogonal signals of a signal X and a signal Y, the signal X is totally reflected on the surface of a reflecting film 10 at a first optical waveguide array 6 according to a reflection angle which is the same as an incident angle, the signal Y is kept parallel to the first optical waveguide array 6 at the moment, after passing through the first optical waveguide array 6, the signal Y is totally reflected on the surface of a reflecting film 10 at a reflection angle which is the same as the incident angle, and a reflected optical signal formed by the reflected signal Y and the signal X is in mirror symmetry with the original optical signal. Therefore, the light rays in any direction can realize mirror symmetry through the flat lens 1, the divergent light of any light source can be converged into the floating real image 4 again at the symmetrical position through the flat lens 1, the imaging distance of the floating real image 4 is the same as the distance from the flat lens 1 to the image source (display 2), the floating real image 4 is imaged at equal distance, and the floating real image 4 is positioned in the air, and the real image is directly imaged in the air without a specific carrier. Therefore, the image in the space seen by the user is the light emitted by the actual object.
As shown in fig. 10, the light source of the display 2 passes through the flat lens 1 inside the contactless optical code input device 100, and then the above process occurs on the flat lens 1, specifically, the incident angles of the light rays on the first optical waveguide array 6 are α 1, α 2, and α 3, the reflection angles of the light rays on the first optical waveguide array 6 are β 1, β 2, and β 3, where α 1 is β 1, α 2 is β 2, and α 3 is β 3, the incident angles on the second optical waveguide array 7 after being reflected by the first optical waveguide array 6 are γ 1, γ 2, and γ 3, and the reflection angles δ 1, δ 2, and δ 3 on the second optical waveguide array 7, where γ 1 is δ 1, γ 2 is δ 2, and γ 3 is δ 3.
The incident angles after the convergent imaging are respectively alpha 1, alpha 2 and alpha 3.. alpha n, and the distance L between the image and the flat lens 1, the image is imaged at the equal interval L between the flat lens 1 and an original light source (a display 2), and the visual angle epsilon is 2 times max (alpha), so that if the size of the optical waveguide array is small, the image can be seen only at a certain distance from the front; if the size of the optical waveguide array is increased, a larger imaging distance can be achieved, thereby increasing the field of view.
Preferably, the included angle between the flat lens 1 and the display 2 is set to be in the range of 45 ° ± 5 °, so that the size of the flat lens 1 can be more fully utilized, and simultaneously, better imaging quality and smaller afterimage influence are obtained. But other angles may be chosen at the expense of partial imaging quality if there are other requirements on the imaging position. It is also preferable that the size of the flat lens 1 is set so that the user can see the picture of the floating real image 4 presented by the entire display 2 at a glance, but if it is only necessary to see part of the content of the display 2 in actual use, the size and position of the flat lens 1 can be freely adjusted according to the actual display picture.
In addition, the imaging principle of the flat lens 1 having a double-layer structure using the first optical waveguide array 6 and the second optical waveguide array 7 is mainly described above, and the same imaging principle is applied if a plurality of cubic columnar reflection units 9 each having a reflection film on the four peripheral surfaces are arrayed in both the X and Y directions in one optical waveguide array structure, that is, two optical waveguide arrays are combined into one layer. The structure of the plate lens 1 of the contactless optical code input device 100 is also possible.
Specifically, when the atm 1000 is in operation, the display 2 displays an image signal sent by the controller host 5, and displays a password input interface, the flat lens 1 can image light sent by the display 2 into air on the other side of the flat lens 1 to form a real image of the password input interface of the atm 1000, when a user touches a virtual key on the password input interface to input a password, the optical sensor 3 can track and record the virtual key touched by the user and the sequence of touching the virtual key, and transmit a signal to the controller host 5, thereby realizing man-machine interaction, and meanwhile, in the process of inputting the password, because the flat lens 1 has a specific field angle, only a person within a certain distance from the real image of the password input interface can see the real image of the password input interface of the atm 1000, thereby being beneficial to preventing other persons from peeping the password input interface, the privacy information of the user is protected, meanwhile, fingerprint residues are avoided through contactless operation, and the information safety is enhanced.
According to some embodiments of the present invention, the imaging pattern of the display 2 may comprise RGB (red, green, blue) light diodes (LEDs), LCOS (liquid crystal on silicon) devices, OLED (organic light diodes) arrays, projections, lasers, laser diodes or any other suitable display or stereoscopic display. The display 2 can provide a clear, bright and high contrast dynamic image light source, and the brightness of the display 2 is not lower than 500cd/m2The influence of the luminance loss in the optical path propagation can be reduced.
Furthermore, according to the utility model discloses a some embodiments carry out visual angle control to the display image surface of display 2 and handle, can lighten the ghost of floating real image 4, improve picture quality, also can prevent that other people from peeping to the wide application needs the input device of privacy information protection.
According to some embodiments of the utility model, optical sensor 3 is far and near infrared sensor, ultrasonic sensor, laser interference sensor, grating sensor, encoder, optic fibre formula sensor or CCD sensor. That is, the sensing form of the optical sensor 3 includes, but is not limited to, far and near infrared, ultrasonic, laser interference, grating, encoder, fiber optic type or CCD (charge coupled device), etc. The sensing area of the optical sensor 3 and the floating real image 4 are located on the same plane and comprise a three-dimensional space where the floating real image is located, an optimal sensing form can be selected according to an installation space, a viewing angle and a use environment, a user can conveniently operate the floating real image 4 in an optimal posture, and the sensitivity and the convenience of user operation are improved.
According to the utility model discloses a some embodiments, controller host computer 5 adopts wired or wireless mode to be connected with optical sensor 3, transmission digit or analog signal to can control contactless optics password input device 100's volume in a flexible way, can strengthen contactless optics password input device 100's electrical stability moreover.
According to some embodiments of the present invention, the first optical waveguide array 6 is the same thickness as the second optical waveguide array 7. Therefore, the complexity of the structures of the first optical waveguide array 6 and the second optical waveguide array 7 can be simplified, the manufacturing difficulty of the first optical waveguide array 6 and the second optical waveguide array 7 can be reduced, the production efficiency of the first optical waveguide array 6 and the second optical waveguide array 7 can be improved, and the production cost of the first optical waveguide array 6 and the second optical waveguide array 7 can be reduced. Note that the same thickness here includes a relative range, and is not absolutely the same, i.e., the difference in thickness between the optical waveguide arrays is acceptable if the aerial imaging quality is not affected, for the purpose of improving production efficiency.
As shown in fig. 1, an automatic teller machine 1000 according to a second aspect of the present invention includes a housing 20 and a contactless optical password input device 100 for an automatic teller machine 1000 according to a first aspect of the present invention.
According to the utility model discloses an automatic teller machine 1000, through setting up the contactless optics password input device 10 that is used for automatic teller machine 1000 of above-mentioned first aspect, dull and stereotyped lens 1 can be with the real image of the password input interface of forming automatic teller machine 1000 in the light imaging to dull and stereotyped lens 1's the opposite side of display 2's the sending, only can see the real image of automatic teller machine 1000's password input interface apart from the real image within the certain distance on password input interface the people to can be favorable to preventing that other personnel from peeping at the password input interface, protect user's privacy information.
In some embodiments of the present invention, the front panel of the housing 20 has a mounting groove, and the flat lens 1 is disposed in the mounting groove. It can be understood that, by disposing the flat lens 1 in the mounting groove, the flat lens 1 does not protrude from the surface of the front panel of the housing 20, which can protect the flat lens 1 and is more visually attractive.
In some embodiments of the present invention, the inner wall of the mounting groove has a fastening hole, and the side wall of the plate lens 1 has a fastening hook cooperating with the fastening hole. The clamping hook and the clamping hole have the advantages of simple structure and easiness in assembly, and the tight connection of the flat lens 1 and the front panel can be realized through the matching of the clamping hook and the clamping hole. In addition, the cost can be reduced while the connection strength of the flat lens 1 and the front panel is ensured. Note that the same thickness here includes a relative range, and is not absolutely the same, i.e., the difference in thickness between the optical waveguide arrays is acceptable if the aerial imaging quality is not affected, for the purpose of improving production efficiency.
[ second embodiment ]
An automatic teller machine 1000 according to a second embodiment of the present invention will be described with reference to fig. 12. The configuration is the same as that of the first embodiment except for the difference in the structure of the contactless optical password input device 100, and thus, a repetitive description of the same configuration with the same symbols will be omitted.
The structure of the contactless optical password input apparatus 100 is characterized in that a total reflection mirror 12 is added to the side of the flat lens 1 where the display 2 is located. Light emitted by the display 2 is reflected by the total reflection mirror 12, enters the flat lens 1, and finally converges on the other side of the flat lens 1, so that a floating real image 4 is formed. The functions and structures of the optical sensor 3 and the controller host 5 are the same as those of the first embodiment.
It can be seen that, in this embodiment, after the light of the display 2 is reflected by the total reflection mirror 12, a virtual image 13 that is as large as the display 2 and is plane-symmetric with respect to the total reflection mirror 12 is equivalently formed on the other side of the total reflection mirror 12, and the floating real image 4 is actually mirror-symmetric with respect to the flat lens 1 with the virtual image 13. Preferably, the included angle between the flat lens 1 and the virtual image 13 is set to be in the range of 45 ° ± 5 °, so that the size of the flat lens 1 can be more fully utilized, and simultaneously, better imaging quality and smaller afterimage influence are obtained. But other angles may be chosen at the expense of partial imaging quality if there are other requirements on the imaging position. It is also preferable that the size of the flat lens 1 and the total reflection mirror 12 is set so that the user can see the picture of the floating real image 4 presented by the entire display 2 at a glance, but if only a part of the content of the display 2 needs to be seen when actually used, the size and position of the flat lens 1 can be freely adjusted according to the actual display picture.
The effect of this embodiment is that the orientation of the display screen in the display 2 can be changed, and the display 2 can be disposed closer to the flat lens 1, and under the condition that the distance between the floating real image 4 and the flat lens 1 is not changed, the overall thickness of the contactless optical password input device 100 is significantly reduced, so that the contactless optical password input device can be better integrated into the automatic teller machine 1000.
It is understood that a plurality of total reflection mirrors 12 (not shown) may be provided in the contactless optical password input apparatus 100, and the light of the display 2 is reflected therein a plurality of times to form a virtual image farther from the flat lens 1, so that the thickness of the contactless optical password input apparatus 100 may be further reduced.
[ third embodiment ]
An automatic teller machine 1000 according to a second embodiment of the present invention will be described with reference to fig. 13. The configuration is the same as that of the first embodiment except for the difference in the structure of the contactless optical password input device 100, and thus, a repetitive description of the same configuration with the same symbols will be omitted.
The structure of the contactless optical password input device 100 is characterized in that a retro-reflector 14 is used to replace a flat lens 1, and a beam splitter 15 is added to enable light from a display 2 to be converged in the air again to present a floating real image 4.
Specifically, the imaging principle of the present embodiment is as follows:
the light emitted by the display 2 is firstly reflected to the surface of the retro-reflector 14 through the beam splitter 15, the beam splitter 15 has the characteristic of semi-reflection and semi-transmission, when the part of light enters the surface of the retro-reflector 14, the light is reflected again through the microstructures in the retro-reflector 14, the reflected light returns from the direction close to the direction of the incident light, at the moment, the reflected light is transmitted when passing through the beam splitter 15, and therefore a floating real image is formed in the air at the position of the display 2, which is plane-symmetrical relative to the beam splitter 15.
The beam splitter 15 is used to split a light beam into two light beams, one light beam is transmitted and the other light beam is reflected, and is made of a metal film or a dielectric film, and the ratio of reflection to transmission is about 1:1 in the embodiment, which can be classified into a polarized type and a non-polarized type in principle.
The surface of the retro-reflector 14 has a retro-reflection effect, so that incident light can be reflected from a direction close to the opposite direction of the incident direction, and the surface is mainly covered with micro glass beads or micro prism structures, so that the incident light can be refracted and reflected through the internal microstructures, and the light can be emitted along the opposite direction of the incident direction. Since the structure of the retro-reflector 14 is relatively conventional, it will not be described herein in more detail.
Furthermore, according to some embodiments of the present invention, 1/4 wave plate 16 may be disposed on the surface of the retro-reflector 14, if the light emitted from the display 2 is linearly polarized, reflected by the polarizing beam splitter 15, and then enters the retro-reflector 14 through 1/4 wave plate 16, the reflected light returns from the opposite direction close to the incident light and then passes through 1/4 wave plate 16 again, and the polarization plane of the linearly polarized light emitted from the display 2 is rotated by 90 degrees, so that the light can be emitted from the polarizing beam splitter 15 and converged into the floating image 4 in the air. The method can greatly improve the energy utilization rate of the light of the display 2 and reduce the light intensity loss, thereby improving the brightness of the floating real image 4. It will be appreciated that if the display 2 is sufficiently bright, or if the light emitted by the display 2 is not linearly polarized, a non-polarizing beam splitter 15 may be used without 1/4 wave plate 16.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (17)
1. A contactless optical password input apparatus for an automated teller machine, the automated teller machine including a housing, the contactless optical password input apparatus comprising:
the display is arranged in the shell;
the display is arranged on one side of the equivalent negative refractive index optical element, and a floating real image of a password input interface of the automatic teller machine opposite to the display is formed on the other side of the equivalent negative refractive index optical element;
an optical sensor for detecting user manipulation of the floating real image.
2. The contactless optical password input apparatus for an automatic teller machine according to claim 1, wherein the equivalent negative refractive index optical element comprises: the optical waveguide array comprises a first optical waveguide array and a second optical waveguide array which are formed by laminating a plurality of reflecting units, wherein the first optical waveguide array and the second optical waveguide array are tightly attached to each other on the same plane and are orthogonally arranged.
3. The contactless optical password input apparatus for an automatic teller machine according to claim 2, wherein the reflection unit has a rectangular cross section, and a reflection film is provided on one side or both sides in a stacking direction of the reflection unit.
4. A contactless optical password input apparatus for an automatic teller machine according to claim 3, wherein the reflection unit has a cross-sectional width and length a and b, respectively, and satisfies: a is more than 0.2mm and less than 5mm, and b is more than 0.2mm and less than 5 mm.
5. The contactless optical password input apparatus for an automatic teller machine according to claim 2, wherein the first optical waveguide array or the second optical waveguide array is composed of a plurality of parallel arranged reflection units arranged obliquely at 45 °.
6. The contactless optical password input apparatus for an atm of claim 2, wherein the first and second optical waveguide arrays are arranged orthogonally to each other with respect to waveguide directions of mutually corresponding portions of the first and second optical waveguide arrays.
7. The contactless optical password input apparatus for an automated teller machine according to claim 2, wherein the equivalent negative refractive index optical element further comprises two transparent substrates, the first optical waveguide array and the second optical waveguide array being disposed between the two transparent substrates.
8. The contactless optical password input apparatus for an atm of claim 7, wherein the equivalent negative refractive index optical element further comprises an anti-reflection part and a viewing angle control part, the anti-reflection part and the viewing angle control part being disposed between the first optical waveguide array and the second optical waveguide array; or
The anti-reflection component and the visual angle control component are arranged between the transparent substrate and the first optical waveguide array; or
The antireflection member and the viewing angle control member are disposed between the transparent substrate and the second optical waveguide array.
9. The contactless optical password input apparatus for an atm of claim 7, wherein a photosensitive adhesive is disposed between the first optical waveguide array and the second optical waveguide array, between the first optical waveguide array and the adjacent transparent substrate, and between the second optical waveguide array and the adjacent transparent substrate.
10. The contactless optical password input apparatus for an automatic teller machine according to claim 1, further comprising: the total reflector is arranged on one side of the equivalent negative refractive index optical element and arranged on the same side of the display so as to reflect light rays emitted by the display to the equivalent negative refractive index optical element.
11. The contactless optical password input apparatus for an automatic teller machine according to claim 1, wherein the equivalent negative refractive index optical element comprises: a retro-reflector and a beam splitter, the retro-reflector and the display being located on a same side of the beam splitter and the beam splitter reflecting light from the display to the retro-reflector, the beam splitter transmitting light from the retro-reflector.
12. A contactless optical password input apparatus for an automatic teller machine according to claim 11, wherein the surface of the retro-reflector is provided with 1/4 wave plates.
13. The contactless optical password input apparatus for an automatic teller machine according to claim 1, wherein the optical sensor is a far-near infrared sensor, an ultrasonic sensor, a laser interference sensor, a grating sensor, an encoder, a fiber optic sensor, or a CCD sensor.
14. An automated teller machine comprising a housing and a contactless optical password input device for an automated teller machine according to any of claims 1 to 13.
15. The automated teller machine of claim 14, further comprising:
the controller host is arranged in the shell and connected with the display and the optical sensor in a wired or wireless mode to transmit digital or analog signals.
16. The atm of claim 14, wherein the front panel of the cabinet has a mounting slot, the equivalent negative index optical element being disposed within the mounting slot.
17. The atm of claim 16, wherein the mounting slot has a detent hole on an inner sidewall thereof, and the equivalent negative refractive index optical element has a detent hook on a sidewall thereof for engaging the detent hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021734266.6U CN212675541U (en) | 2020-08-18 | 2020-08-18 | Contactless optical password input device and automatic teller machine |
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| CN202021734266.6U CN212675541U (en) | 2020-08-18 | 2020-08-18 | Contactless optical password input device and automatic teller machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113706768A (en) * | 2021-09-29 | 2021-11-26 | 安徽省东超科技有限公司 | Password input device, terminal equipment and password input method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113706768A (en) * | 2021-09-29 | 2021-11-26 | 安徽省东超科技有限公司 | Password input device, terminal equipment and password input method |
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