EP1291828A2 - Elément semi-conducteur électroluminescent pour le test de caractéristiques de sécurité luminescentes monté dans un boítier - Google Patents

Elément semi-conducteur électroluminescent pour le test de caractéristiques de sécurité luminescentes monté dans un boítier Download PDF

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Publication number
EP1291828A2
EP1291828A2 EP02025709A EP02025709A EP1291828A2 EP 1291828 A2 EP1291828 A2 EP 1291828A2 EP 02025709 A EP02025709 A EP 02025709A EP 02025709 A EP02025709 A EP 02025709A EP 1291828 A2 EP1291828 A2 EP 1291828A2
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EP
European Patent Office
Prior art keywords
housing
leds
elements
electroluminescent
radiation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02025709A
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German (de)
English (en)
Other versions
EP1291828A3 (fr
Inventor
Frank Kappe
Benedikt Dr. Ahlers
Roland Gutmann
Arnim Franz-Burgholz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bundesdruckerei GmbH
Original Assignee
Bundesdruckerei GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19848858A external-priority patent/DE19848858B4/de
Application filed by Bundesdruckerei GmbH filed Critical Bundesdruckerei GmbH
Priority claimed from EP99120299A external-priority patent/EP0996099B1/fr
Publication of EP1291828A2 publication Critical patent/EP1291828A2/fr
Publication of EP1291828A3 publication Critical patent/EP1291828A3/fr
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/121—Apparatus characterised by sensor details
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation

Definitions

  • the present invention relates to a device for the verification of luminescent security features based on in one housing built-in UV and infrared light-emitting luminescent diodes (LEDs).
  • LEDs infrared light-emitting luminescent diodes
  • Luminescent security features for the value and security area have been used for a long time. To the security features on the affected security and valuables are attached with Reliable efforts to make acceptable efforts visible have already been varied Efforts have been made to implement appropriate procedures and devices to develop.
  • the prior art shows DE 94 03 794 U with the title "Security - Test device ".
  • a test device for securities in a correspondingly large housing that is suitable for the Discharge lamp, a UV light source, and a white light source.
  • the UV light source therefore requires a large dimension for the housing, whereby this loses handiness.
  • using a specially for this developed discharge lamp with dimensions 60mm length and 9mm Diameter already created an easy-to-use testing device to it However, it is still easy to have at hand at all times somewhat bulky.
  • the operation of the discharge lamp also requires one Minimum operating time, which requires preheating the tube.
  • WO 93/07590 A describes a banknote checking device that is U-shaped is trained, and is quite complex. For example, it points out Running rollers for pulling a bill through the banknote validator while checking the bill. This results in a lot of effort both in terms of development as well as production and use of the banknote validator. Furthermore, this test procedure requires a high level time expenditure that is no longer adequate these days.
  • US 4,567,370 A shows an authentication device for patterns. For this will use a mercury vapor UV lamp for checking the samples used.
  • the disadvantage here too is the unsatisfactorily long operating time when using the device in addition to its large dimensions.
  • EP 537 513 A1 shows a device for checking banknotes. This is an excitation for security elements by means of LEDs or IR LEDs caused. A UV test area is not mentioned in this document, so that this spectral range of the security elements seems to be left out. A The answers to the banknotes are recorded by a CCD camera, which forwards the detected signals for evaluation. Here too apply di Disadvantages of high development and manufacturing costs, relative large dimensions and a lot of time when checking the Paper money.
  • DE 296 07 075 U1 shows a luminescence sensor disclosed.
  • the luminescence switch is intended for this purpose, in the UV range To emit light signals and in a surveillance area Reflected object, reflected in the visible wavelength range Detect signals and with a dedicated evaluation unit evaluate.
  • the luminescence switch is semi-transparent Mirror equipped by which the reflected signals for detection and Go through the evaluation unit.
  • the ray path from the semi-transparent mirror to the object to be tested and the beam path of the reflections are in an axis.
  • the device is thus very complex and the method for Detection and evaluation of the reflections from the object to be tested as such is very complex. So you have the disadvantage that in addition to Transmitting unit a radiation deflecting unit in the form of a semi-transparent Mirror and a receiving and evaluation unit are required. This means an enormous effort, both technical and financial Respect. Due to the high level of technology, there is also a appropriate sensitivity of the device, which must be observed.
  • DE 197 01 513 A1 describes a test method and a test device for the Authenticity control of authenticity marks.
  • the process uses two Sending sources for the emission of radiation to a specific target.
  • the the two radiation sources are arranged side by side and are thus in a certain angle of incidence to the object, from which reflections be delivered. These reflections are detected by a detector and evaluated.
  • the two radiation sources are time-division multiplexed by operated a control unit. So the method and the device also depend on the detection of the reflections, and are therefore very natural in nature consuming.
  • the argumentation applies that both technically and Financially great efforts must be made to achieve this to realize technical teaching.
  • luminescent security features are not yet visible so mature that they are easy and uncomplicated to use enable reliable detection of the security features.
  • the present invention is therefore based on the object of a device for the verification of luminescent security features put which in and / or on value and security documents and Objects are arranged, the verification without health Damage to the user and those in the immediate vicinity located people should be feasible.
  • luminescent material with imperceptible afterglow which is called fluorescent
  • the second type of luminescent material, which has the effect of a Afterglow is called phosphorizing.
  • the energy supply for the operation of the LEDs used can due to the low power consumption compared to the tubes, definitely via batteries, so-called button cells. Through this Power supply, it is guaranteed that the test equipment for Verification of luminescent security elements regardless of location can be done. Another advantage is that the test facility can be transported easily and based on the small dimensions and associated light weight available to everyone at all times can stand by this testing facility, like other everyday utensils Is always at hand.
  • diodes are combined so that they form a bundle which approximately in a same beam direction its at least partially outside the visible Radiate radiation in the wavelength range.
  • the invention is at least one light-emitting diode arranged, which emits light in the visible range, creating a first Security feature, namely an optical operating display, is used.
  • a first Security feature namely an optical operating display
  • Another additional security device of the present invention is that optionally also an acoustic operating display which shows LEDs working in the invisible spectral range.
  • Another advantage of the present invention over those previously Fluorescent lamps used is that the life of the LEDs are a multiple of the life of fluorescent lamps. Especially when the fluorescent lamps are switched on and off frequently Lifespan of this is significantly reduced, creating an average Lifespan of approximately 1000 operating hours for the fluorescent lamps is far below. The lifespan of the LEDs, however, is one Multiples of 1000 operating hours.
  • UV-LED's UV light-emitting diodes
  • the UV LEDs are in their design and in their electrical characteristics comparable to conventional light emitting diodes. LEDs for the visible wave range (wavelength 400 nanometers to 700 nanometers) and for the near infrared range (IR; wavelength 700 Nanometers to 1000 nanometers) have been in use for a long time. You will be in the technology above all as display elements (blue, green, yellow and red LEDs) or used in remote controls, light barriers (IR LEDs). The Desire for ever shorter wavy LEDs is justified by the fact that the optical storage density of data, for example on CD or DVD decreasing wavelength is getting bigger.
  • LEDs work in a wavelength range of 370 nanometers and thus have a wavelength similar to that of commercially available UV lamps (Wavelength 375 nanometers).
  • Another advantage of the light-emitting diodes over the fluorescent tubes is in that the light emitting diodes immediately provide their full optical power as soon as they are energized.
  • the fluorescent tube however, it takes a certain amount of time to ignite the gas and thus to achieve their luminosity and operational readiness.
  • In order to the disadvantage of the waiting time between are automatically connected Switch-on time and the first operational state of the fluorescent tube as well as the disadvantage of the significantly higher power consumption.
  • a power supply is required for the correct operation of these LEDs between 3.5 volts and 4.5 volts necessary.
  • This power supply can using appropriately sized batteries for a satisfactorily long time Service life can be achieved.
  • a consistently intense luminosity can be achieved by using a Constant current source for the supply of the UV LEDs can be achieved. Care the transistors used to ensure that the UV LEDs are always the same Voltage drops, which results in constant luminosity when used. By using such a constant current source, it is also possible Use battery voltages above 4.5 volts, which are caused by the electronics the correspondingly required values are limited. With the previously specified Data thus generates a power consumption of approximately 10 milliamperes. Under These operating conditions have a lifespan of approximately 2000 Operating hours according to the manufacturer's specification. When using conventional alkaline batteries of the type LR44 (1.5 volts) result in a Operating time of approximately 12 hours.
  • One sets for checking one Security and value document for a period of 10 seconds a number of test operations, which is 4320 operations.
  • the present invention provides that the suggestion for delivery luminescent radiation caused by the infrared or ultraviolet Radiation, by pulse method for the supplied operating voltage used LED's is influenced so that different colors the correspondingly excited luminescence security features on the value and Sign off security documents and objects. Background this changing color spectrum of the luminescent features emitted radiation is the superposition of emitted luminescent Radiation from different frequency ranges due to use of different colors, the individual decay constants of different Order of magnitude. It is advantageous to use luminescent colors which have significantly different decay constants.
  • the ultraviolet or infrared radiation which from the semiconductor solid-state elements is therefore directly from the Voltage dependent, since this immediately reaches its full radiant power when applied of a corresponding voltage and this until the switch-off time maintained.
  • the luminescent security features in the Form of the supplied operating voltage from the infrared and ultraviolet Radiation irradiated. Due to the intermittent and / or modulated form of this Power supply are now the retroreflective characteristics of the for Security features used luminescent colors depending on their Decay constants recorded by the eye.
  • the color A only Has 1/10 of the decay constant of color B, so is corresponding intermittent and / or modulated form of the supply voltage for the LEDs it is possible to influence the radiation characteristics of color A that - compared to the radiation intensity of color B - it goes to zero. Thereby there is a retroreflective effect which only reveals the color B.
  • the pulse ratio of the operating voltage changes so that the Pulse ratio has significantly longer switch-on than switch-off periods, so again sends the color A, which is just a much smaller one Radiation constant shows as the color B, again perceptible to the eye Radiation. This results in a frequency mix of the retroreflection according to the relationship between the colors A and B, which results in a Perceive color change of the emitted luminescent colors for the eye leaves.
  • the color A is green and the color B is blue pulsed power supply the reflection of the security elements Color blue / green.
  • the voltage supply will change over time the color A - i.e. green - always between the voltage switched on and off weaker and the color blue would remain constant. This modulation can go so far be driven until the reflection of the color green has completely subsided is. In this case, the color would now be blue, based on its large size Decay constant, still emit visible radiation.
  • the present invention now provides that the modulation method for Operating voltage of the LED's are optional when checking the value and Security documents and objects vary. This allows the whole Frequency spectrum of the applied security features can be checked. This is shown by a change in the retroreflective colors, which change results from the sum of the retroreflective frequencies.
  • Another alternative power supply results from the use of a DC / DC inverter.
  • This IC is able to multiply the voltage of a battery. In this way it is possible to develop electronics for the UV LEDs that only need one or two LR44 batteries.
  • This embodiment is an alternative to the embodiment with the constant current source.
  • An embodiment of this housing is designed so that it due to its small dimensions on the keychain in your pocket can be worn without hindering the owner.
  • the ergonomics of the UV LEDs prevent accidental operation when carried in bags is prevented. Care was also taken to ensure that the button for the Operation of the control device for both right and left-handers is equally convenient to use. A clear audible and noticeable switching click also ensures that the user has no unintended Commissioning of the control device completed.
  • the core housing is made of acrylonitrile butodiene styrene copylymere (ABS) thermoplastic injection molding process.
  • ABS acrylonitrile butodiene styrene copylymere
  • elastomeric elements are used so that the function of the test facility Floor traps from hip or shoulder height, even on hard floors, such as Stone floors or the like, is not affected.
  • the high breaking strength of the test facility achieved in this way is another Security feature of the present invention.
  • Another feature of Safe operation of the test device lies in the fact that the housing design is carried out that it is sealed splash-proof.
  • the UV LEDs arranged in the housing so that scratching by protruding elements is avoided and so the opening angle of approximately 10 ° of the emitting UV and / or IR light is retained at all times.
  • This stationary UV LED lamp comes with several LEDs are equipped to provide a uniform, intensive illumination guarantee.
  • This verifier can optionally be equipped with a UV filter his. This filter can remove the annoying, visible, blue light components of the UV LEDs reduce and thus an improved visibility of the luminescence enable. In addition, the color fastness of the luminescence restored compared to that with UV lamp.
  • a proximity sensor In order to enable a corresponding value and security product or object to be recognized when it is introduced into the control position, it is provided to install a proximity sensor.
  • This proximity sensor switches on the power supply for the LEDs when a value and security product or object is detected. This enables the control process described above to be triggered.
  • the UV-LED verifier is therefore equipped with a sensor that detects whether a security document to be checked is under the device.
  • the UV LEDs are only switched on in this case.
  • Such a sensor could be implemented using a simple light barrier.
  • the advantage of this solution is that the UV LEDs are only switched on when they are needed.
  • the service life in this operation is significantly increased and exceeds that of a stationary UV lamp, with which such operation is not possible, many times over.
  • UV LEDs In addition to those under UV light luminescent Security features are also increasingly used feature materials that under irradiation with infrared light in the visible lighting area (down-conversion or anti-stocks) converge. A combination of UV and IR LEDs is therefore sensible, since it checks both security features in this way can be.
  • FIG. 1 shows a UV-IR-LED pointer, which has 5 UV-LEDs in a housing 2, IR-LEDs 3, LEDs in the visible wave range 4, and batteries 6 includes.
  • the button 9 On the electronics energy on the batteries 6 on the LEDs 2,3,4 voltage in the intended operating voltage level delivered and this stimulated to glow.
  • the acoustic display 12 for emitting a signal by actuating with the appropriate spring force provided button 9 causes. Through this acoustic signal, as well the LED in the visible wave range ensures that none invisible radiation can escape from the LED's without warning signals be delivered in both optical and acoustic form.
  • the levy The optical signal is used to trigger the closing reflex of the eye muscles.
  • the emission of the ultraviolet or infrared radiation from the UV / IR LEDs is used to stimulate the luminescent security features of the items to be checked Valuable and security documents and objects. Because of the suggestion by ultraviolet or infrared light is found on the security features a down-conversion energy transfer takes place which the Security features for radiation in the visible wavelength range.
  • Figure 2 shows a plan view of the embodiment of Figure 1, the Top view is from the direction in which the emitted radiation from the LED's is directed. With this arrangement, several LEDs can be seen, which in one bundled state on the front side of the housing 5 of the UV-IR LED pointer are arranged.
  • Figure 3 shows a sectional view of a further embodiment of the Present invention, the LED combination UV-LED 2, IR-LED 3 and LEDs in the visible wave range 4 are shown as a single unit. Furthermore, the electronics 8 are the buttons 9 and the batteries 6 with the contacts 7 recognizable in the housing 5. The mode of operation of this embodiment corresponds in principle the mode of operation of the previously described embodiment.
  • FIG. 4 shows a vertical sectional illustration according to FIG. 3.
  • the ergonomic design of the handy UV / IR LED pointer is clear in form recognizable.
  • At the bottom of the case is an ergonomic one Grip recess 10 recognizable.
  • This illustration is good too recognizable that an actuation of the button can only take place if deliberately on the cover 11 lying lower than the rest of the housing the button 9 pressure is exerted. This pressure needs a certain one Exertion of force, which ensures that an unintentional actuation of the UV / IR LED pointers is avoided.
  • FIG. 5 shows a sectional view through section A-A of FIG. 3.
  • the arrangement of four batteries 6 in the housing 5 shown. These batteries are used to supply power to the UV LEDs IR-LED's, as well as the LED in the visible wave range and the acoustic Operating display 12.
  • Figure 6 shows a sectional view according to section B-B of Figure 3.
  • Housing 5 on the left side of the recessed grip 10 can be seen, which also in the Figure 4 is shown in the lower left area.
  • the button is in the middle 9 and the LED unit 2, 3, 4 for the LEDs.
  • the electronics 8 recognizable.
  • FIG. 9 shows a front view of this inner part of this embodiment of the present invention.
  • the middle in the middle is the single unit shown combination of LEDs 2,3,4 recognizable.
  • the button 9 is located behind it and an electronic component 8.
  • the contacts 7 recognizable with their connections to the board.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Burglar Alarm Systems (AREA)
EP02025709A 1998-10-23 1999-10-12 Elément semi-conducteur électroluminescent pour le test de caractéristiques de sécurité luminescentes monté dans un boítier Withdrawn EP1291828A3 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19848858A DE19848858B4 (de) 1998-10-23 1998-10-23 Elektrolumineszierendes Halbleiterfestkörperelement in einer Vorrichtung als Prüfmittel für lumineszierende Sicherheitsmerkmale und Verfahren zu dessen Anwendung
DE19848858 1998-10-23
EP99120299A EP0996099B1 (fr) 1998-10-23 1999-10-12 Elément semi-conducteur électroluminescent pour le test de caractéristiques de sécurité luminescentes

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP99120299A Division EP0996099B1 (fr) 1998-10-23 1999-10-12 Elément semi-conducteur électroluminescent pour le test de caractéristiques de sécurité luminescentes
EP99120299.5 Division 1999-10-12

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EP1291828A2 true EP1291828A2 (fr) 2003-03-12
EP1291828A3 EP1291828A3 (fr) 2005-05-18

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EP02025709A Withdrawn EP1291828A3 (fr) 1998-10-23 1999-10-12 Elément semi-conducteur électroluminescent pour le test de caractéristiques de sécurité luminescentes monté dans un boítier

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007025740A1 (fr) * 2005-08-30 2007-03-08 Giesecke & Devrient Gmbh Procede et dispositif pour verifier l'authenticite de billets de banque
WO2007059923A1 (fr) * 2005-11-22 2007-05-31 Giesecke & Devrient Gmbh Dispositif pour controler l'authenticite de billets de banque
WO2007074324A1 (fr) * 2005-12-27 2007-07-05 Prime Technology Llc Validation d'etiquette securisee

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4224602A (en) * 1978-12-04 1980-09-23 Gte Sylvania Incorporated Signalling device
DE3520848A1 (de) * 1984-07-11 1985-10-31 Alps Electric Co., Ltd., Tokio/Tokyo Tastschalter
US4567370A (en) * 1984-02-21 1986-01-28 Baird Corporation Authentication device
DE9403794U1 (de) * 1994-03-07 1994-05-19 Czewo Plast Kunststofftechnik Gmbh, 93073 Neutraubling Wertpapier-Prüfgerät

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4224602A (en) * 1978-12-04 1980-09-23 Gte Sylvania Incorporated Signalling device
US4567370A (en) * 1984-02-21 1986-01-28 Baird Corporation Authentication device
DE3520848A1 (de) * 1984-07-11 1985-10-31 Alps Electric Co., Ltd., Tokio/Tokyo Tastschalter
DE9403794U1 (de) * 1994-03-07 1994-05-19 Czewo Plast Kunststofftechnik Gmbh, 93073 Neutraubling Wertpapier-Prüfgerät

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007025740A1 (fr) * 2005-08-30 2007-03-08 Giesecke & Devrient Gmbh Procede et dispositif pour verifier l'authenticite de billets de banque
US7860293B2 (en) 2005-08-30 2010-12-28 Giesecke & Devrient Gmbh Method and apparatus for determining the authenticity of bank notes
WO2007059923A1 (fr) * 2005-11-22 2007-05-31 Giesecke & Devrient Gmbh Dispositif pour controler l'authenticite de billets de banque
US8139839B2 (en) 2005-11-22 2012-03-20 Giesecke & Devrient Gmbh Apparatus for checking the authenticity of banknotes
WO2007074324A1 (fr) * 2005-12-27 2007-07-05 Prime Technology Llc Validation d'etiquette securisee

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Publication number Publication date
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