WO1997050070A1 - Dispositif pour afficher des caracteres et des symboles alphanumeriques - Google Patents

Dispositif pour afficher des caracteres et des symboles alphanumeriques Download PDF

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Publication number
WO1997050070A1
WO1997050070A1 PCT/EP1997/003145 EP9703145W WO9750070A1 WO 1997050070 A1 WO1997050070 A1 WO 1997050070A1 EP 9703145 W EP9703145 W EP 9703145W WO 9750070 A1 WO9750070 A1 WO 9750070A1
Authority
WO
WIPO (PCT)
Prior art keywords
carrier
light
receiver
emitting diodes
rod
Prior art date
Application number
PCT/EP1997/003145
Other languages
German (de)
English (en)
Inventor
Karl Heinz Ronkholz
Original Assignee
Lumino Licht Elektronik 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 DE29611155U external-priority patent/DE29611155U1/de
Priority claimed from DE29621296U external-priority patent/DE29621296U1/de
Application filed by Lumino Licht Elektronik Gmbh filed Critical Lumino Licht Elektronik Gmbh
Priority to AU32598/97A priority Critical patent/AU3259897A/en
Priority to EP97928220A priority patent/EP1004110B1/fr
Priority to DE59704216T priority patent/DE59704216D1/de
Priority to AT97928220T priority patent/ATE203846T1/de
Publication of WO1997050070A1 publication Critical patent/WO1997050070A1/fr

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background

Definitions

  • the invention relates to a device for displaying alpha-numeric characters and symbols according to the preamble of claim 1.
  • LEDs light-emitting diodes
  • Such a device in the form of a spherical LED display is known from practice, for example, in which one or more vertically arranged rows of light-emitting diodes are arranged on a correspondingly formed one in the interior of the sphere, generally of the rotationally symmetrical housing, made of acrylic glass or the like translucent material Carrier.
  • the carrier rotates by means of an electric motor at high speeds of, for example, 2000 rpm to 3000 rpm, as a result of which the one or more LED row (s), preferably aligned parallel to the axis of rotation of the electric motor, also rotate or rotate.
  • a suitable software-supported control of the LEDs a standing picture or a standing or readable character and / or picture sequence moving or moving in the manner of a scrolling text is placed on the housing for the viewer.
  • a row of LEDs or LED groups is arranged vertically on a correspondingly designed carrier, which rotates at a constant angular speed of more than 1200 rpm around the vertical axis of a drive motor.
  • the block diagram includes a sequence generator for generating the code sequences for the character and image sequences and a synchronization circuit for detecting the angular position of the rotating LED carrier, from which the rotational speed of the LED carrier is determined and regulated.
  • a first object of the invention is therefore to provide a device of the type mentioned at the outset with improved control of the display device and the LEDs.
  • the translucent spheres usually used for the above-mentioned display devices generally have only a relatively small receiving opening for the installation of the display technology or display arrangement with LEDs. Furthermore, a counterweight to the LED row or rows is provided for stabilization during the rotary movement. As a result of this, the assembly of such devices encounters considerable technical difficulties which do not permit series production.
  • a second object of the invention is therefore to improve a device of the type mentioned at the outset in such a way that technically simple and series production is possible.
  • the inventive measures according to claim 1 enable an exact measurement of the rotational speed of the drive motor or of the rotating LED arrangement, on the basis of which the LED control is synchronized with the rotational speed of the LED arrangement. Interfering external influences, such as incident light rays, can be largely filtered out using suitable software for optoelectronic rotation speed measurement.
  • the optimal synchronization of the LED control coupled with the extremely precise detection of the rotational speed is essential for a clearly legible and flicker-free sequence of characters and / or images.
  • the device is equipped with a PC interface and / or an infrared interface for the purpose of data transmission for control and programming.
  • the infrared interface enables input a desired character and / or image sequence using a remote control.
  • Figure 1 shows a first embodiment of the device in its basic structure in section along the axis of rotation of the arrangement.
  • FIG. 2 shows a variant of the measuring device of the device of FIG. 1 in a simplified principle construction
  • Fig. 3 shows a second embodiment of the device in its basic structure in section along the axis of rotation of the arrangement, with a ball shown separately and a ball indicated by dash-dotted lines;
  • An electric motor 2 which is designed for a motor speed of approximately 2000 to 3000 rpm, is mounted on a base, pedestal 1 or similar set-up or support device.
  • a synchronous motor can preferably be used as the electric motor 2.
  • a coupling piece 3 is fastened on the drive shaft 20 of the electric motor 2.
  • a circuit board 4 is in turn mounted, which is at an angle of approximately 90 ° to the rotary Axis of the drive shaft 20, which is here also the axis of symmetry 21 of the housing, is oriented.
  • the circuit diagram 4 contains the complete electronic circuits for the control of the device, in particular a control of the LEDs or the LED groups 6 via regulated constant current sources, a non-volatile storage of the alpha-numeric characters and / or symbols and one Character generator for converting the character and / or image sequence into the corresponding LED control.
  • the electronic circuit board 4 also serves as a mechanical holder for a preferably at a right angle to the circuit board 4, i.e. Carrier 5 arranged approximately parallel to the axis of symmetry 21. At least one preferably vertical row of radially outwardly directed LEDs or LED groups 6 is attached to the carrier 5.
  • the LEDs 6 on the carrier 5 are colored light-emitting diodes in a predetermined color sequence. Both light emitting diodes in constantly changing colors and light emitting diodes of the same color can be used. The choice of color essentially depends on the planned display. Furthermore, the application is of course not limited to the only one row of sixteen LEDs 6 used in this exemplary embodiment. Depending on the application, the series can have more or fewer LEDs.
  • the control on the circuit board 4 ensures, according to a stored specification (program, computer program), that the desired LEDs 6 light up in a predetermined time.
  • a stored specification program, computer program
  • the font bold, italic, etc.
  • the image sequence is predefined and the user can only select and enter a desired character and / or image sequence.
  • you can of course also change the font, the running speed or other parameters of the Character and / or image sequence to be displayed can be freely selected by the user.
  • this image Due to the high speed of the drive shaft 20 of the electric motor 2 of approximately 3000 rpm, a "standing" image with an image change frequency of approximately 50 Hz is generated for the viewer of the display device.
  • this image can be a standing or moving typeface made of alpha-numeric characters or else an image. Of course, combinations of such characters are also possible.
  • the LED heads 6 can be beveled, the beveling preferably taking place on the vertical.
  • SMD LEDs 6 can also be applied.
  • a flexible (elastically flexible) spring steel rod 7 is fastened to the side of the circuit board 4 opposite the LED carrier 5. At the free end of this steel rod 7 there is optionally a weight 8, which can be displaced in a very advantageous manner on the spring steel rod 7 in the longitudinal direction and can be locked in any position. This enables an optimal weight balance that is adapted to the structural and operational conditions.
  • a rod made of another material with comparable properties can also be used. It is also conceivable to choose, instead of the spring steel rod 7, a rod which can be folded down or decayed once or several times, or a telescopic rod which, as a result of the centrifugal force, automatically folds up or extends to its operating length upon rotation.
  • the spring steel rod 7 or the equivalent rod element When the arrangement begins to rotate about the axis of rotation 21, the spring steel rod 7 or the equivalent rod element is aligned due to the increasing centrifugal force up to the horizontal position and forms a stabilization and a weight balance of the device in the operating state.
  • the counterweight 8 attached to the end of the spring steel rod 7 compensates for the weight of the LED arrangement 5, 6 used. The entire device thereby achieves a secure stand without the need for special, additional fastenings.
  • the electrical connections 9 of the electronic circuit board 4, in this exemplary embodiment two contacts for energy supply and two contacts for data transmission, are carried out through a (not shown) through the base 1 and the electric motor 2 to high-quality sliding contacts 24 on the rotating coupling piece 3 fed.
  • the sliding contacts 24 run over the entire circumference of the coupling piece 3 and are, for example and preferably made of gold.
  • the two contacts for energy supply are connected to the network via a supply cable 10, which also supplies the electric motor 2 with the necessary energy.
  • the two contacts for data transmission are connected to a PC interface 11 in the base 1 of the device.
  • a computer 12 with a terminal can be connected to this PC interface 11 and can be networked simultaneously with a plurality of display devices of the type described.
  • the device described above can alternatively also be controlled via a remote control 13.
  • a remote control 13 For this is located fixed on the block of the electric motor 2, an infrared sensor 14, the connections of which, for the sake of simplicity, are placed on the PC contacts for data transmission.
  • the infrared sensor 14 can now be mounted both in a fixed position on the stationary base or base 1 or a part of the base 1 and in a moving manner on a rotating part, such as on the support 5 or the circuit board 4.
  • the infrared sensor 14 is attached to a rotating part, the advantage is achieved that data can be transmitted to the so-called spherical display from all directions with the remote control.
  • the frequency range of data transmission with remote control 13 is not limited to the infrared range, but is suitable for use with commercially available remote controls.
  • the remote control 13 in contrast to the computer 12, generally does not have a screen or other display elements to check the entered data, in the case of data transmission with the remote control 13, the display device with its LEDs 6 itself functions as a display for checking the data input.
  • the display device also contains a measuring device 15 for the exact measurement of the rotational speed of the LED arrangement 6 about the axis of rotation 21.
  • the measuring device 15, which is also shown enlarged in FIG. 1, consists of an optoelectronic sensor 16 and a reflector 17.
  • the transmitter Photosensor 16 and receiver constructed is attached to the underside of the rotating circuit board 4.
  • the reflector 17 is fixed at the same distance from the axis of rotation 21 opposite the photosensor 16, for example on the motor block 2, in a fixed position.
  • an active transmitter in the form of a fixed transmitter diode 22 is provided. seen, while the receiver 23 is mounted at a distance opposite one another on the rotating carrier 5 or on the underside of the rotating circuit board 4.
  • the position of the reflector 17 marks, for example, the zero crossing of the rotation.
  • the transmitter of the photosensor 16 continuously or at least with a very rapid pulse sequence, which should have a significantly higher frequency than the rotation of the LED arrangement 6, emits a downward light beam 18a.
  • the light beam 18a is reflected by the reflector 17, and the reflected light beam 18b is received by the receiver of the photo sensor 16.
  • the active transmitter 22 and the receiver 23 work together in an equivalent manner.
  • the rotational speed of the circuit board 4 and thus of the LED arrangement 6 about the axis of symmetry 21 of the arrangement can be determined from the signals recorded with each rotation using suitable software. Since a precisely controlled display speed is essential for a clearly readable, flicker-free generated character and / or image sequence, the display frequency can be corrected accordingly if necessary. Instead of correcting the display frequency to a setpoint value, it is also conceivable, in the event of fluctuations in the rotational speed of the electric motor 2 that are not too great, to adapt the control of the LEDs 6 to the respective actual value of the rotational speed. Exact synchronization of the rotational speed and control of the LEDs 6 is crucial.
  • the arrangement of the photosensor 16 and the reflector 17 is not limited to the type described above, it only has to be ensured that a component of the measuring device 15 is on a component rotating with the LED arrangement 6 and the other component being fixed in place. Furthermore, the measuring device 15 should be arranged in such a way that as few disturbing influences from the outside as possible can influence the measurement of the rotational speed. For this purpose, the distance between photosensor 16 and reflector 17 is expediently chosen to be as small as possible.
  • the display device is equipped with software which makes it possible to filter out such interference effects when measuring the speed of rotation.
  • the receiver of the photosensor 16 or the receiver 23 If a reflecting or active light beam 18b is incident, the receiver of the photosensor 16 or the receiver 23 generates successive current pulses within a period of time.
  • the increase in the current from a value of zero to a value of 1 now generally does not occur suddenly, but rather during a certain period of time.
  • the current then drops from the value one back to the value zero within a further period of time.
  • both the pulse durations and the rise and descent times of two successive pulses are the same.
  • the received signal and thus the generated current pulse can deviate from the usual course. chen. If, for example, the rising edge of the second current pulse is disturbed, the time intervals of two successive current pulses are changed, although the rotational speed of the arrangement remained constant. In this case, the synchronization of rotational speed and LED control described above would even lead to a deterioration in the image quality of the character and / or image sequence.
  • the current pulses generated by the receiver of the photosensor 16 or by the receiver 23 are converted into square-wave signals which ideally have no rising and falling edges.
  • disruptive external influences of any kind can be filtered out, provided that they are not too strong, that is to say, for example, that a normal pulse sequence can no longer be recognized.
  • this software also makes it possible to ignore pulses that may fail once in the case of an otherwise regular pulse sequence. It is thus pretended that the failed pulse is also present, so that a constant rotational speed is still measured.
  • the entire arrangement described above with the components 2-9, 14-17 and 20 is usually mounted in a closed housing 19.
  • the housing 19 is essentially a spherical, cylindrical or otherwise rotationally symmetrical shaped housing.
  • the spherical body 19 consists of a translucent or transparent material, for example acrylic glass, plastic, glass or the like.
  • the preferably used spherical body 19 has a diameter of about 30 cm and has on the other hand a smaller receiving opening 25 through which the arrangement described above is introduced into the spherical body 19.
  • the circuit board 4 can also be attached outside the housing 19.
  • the electrical controls are fed directly to the LEDs via the electrical connections 9.
  • the arrangement of the circuit board 4 within the housing 19 is a preferred construction because all elements are completely in the housing 19 and the LED display device is therefore an autonomous structural unit.
  • the housing 19 offers protection for the circuit board 4 against dirt and harmful environmental influences.
  • FIGS. 1 and 2 show a second exemplary embodiment of the display device according to the invention. The same elements are provided with the same reference numerals as in the first exemplary embodiment in FIGS. 1 and 2.
  • the second exemplary embodiment according to FIG. 3 differs from the first exemplary embodiment described above, above all in the type of attachment of the circuit board 4 and compensating element 7, 8 and the arrangement of the electrical connections.
  • the compensating element 7, 8 is constructed like the compensating element 7, 8 of FIG. 1 described above and is therefore not described again here.
  • the carrier 5 for the LEDs 6 is fastened analogously to the first exemplary embodiment.
  • the electrical connections 9 of the circuit board 4 are fed through a bushing 26 through the base 1, the electric motor 2 and the drive shaft 20 to high-quality sliding contacts 27, which are, for example and preferably made of gold.
  • the bushing 26 is firmly connected to the base 1 and cannot be rotated.
  • the sliding contacts 27 are attached at the upper round rod-shaped end of the bushing 26 over the entire circumference.
  • the current is drawn via likewise high-quality sliding contacts 28 made of gold on the fastening element 3b of the circuit board 4.
  • the receiving opening 25 of the spherical body 19 only has to be as large as the base 1 or the diameter of the electric motor 2.
  • FIG. 4 shows an example of the second exemplary embodiment of the invention according to FIG. 3, the assembly of the first exemplary embodiment described with reference to FIGS. 1 and 2 is of course carried out analogously.
  • FIG. 4a shows the two basic elements spherical body 19 with receiving opening 25 and completely preassembled subassembly comprising electric motor 2, circuit board 4, carrier 5 with LEDs 6 and compensating element 7, 8.
  • the fully assembled ball indicator which is in the operating state is shown in FIG 4h, here the arrow 29 reveals the direction of rotation of the drive shaft 20 and with it the direction of rotation of the LED carrier 5.
  • the carrier 5 with the LEDs 6 is guided obliquely through the receiving opening 25 of the spherical body 19.
  • the spherical body 19 is rotated somewhat according to FIG. 4c, so that the receiving opening 25 is aligned more horizontally.
  • the carrier 5 is brought completely into the spherical body 19 and the subsequent circuit board 4 is guided into the receiving opening 25 until its collar abuts the electric motor 2 on the side or is only a small lateral distance from the electric motor 2.
  • the spherical body 19 is tilted over the entire standing assembly by continuous rotation of its receiving opening 25.
  • the spring steel rod 7 or the rod element described above is constantly sagging downward and can additionally be elastically bent in until it contacts the electric motor 2, the relatively small diameter is sufficient the receiving opening 25 to be placed over the entire assembly. After the spherical body 19 has been completely slipped over, as shown in FIG. 4g, the spring steel rod 7 straightens up again or folds up again and engages.
  • Fig. 4g shows the fully assembled ball display in the idle state.
  • the electric motor 2 rotates the drive shaft 20, which is connected in a rotationally fixed manner to the circuit board 4, the LED carrier 5 and the spring steel rod 7 via the coupling piece 3 or the fastening elements 3a and 3b.
  • the carrier 5 begins to rotate in the spherical body 19. Due to the increasing centrifugal force, the spring steel rod 7 or the equivalent rod element in the spherical body 19 orients itself to the horizontal position and forms a stabilization and an equilibrium balance of the device in the operating state.
  • the weight 8 attached to the end of the spring steel rod 7 compensates for the weight of the LED arrangement 5, 6 used.
  • the entire LED ball display thereby achieves one secure stand without the need for special, additional fastenings.
  • the measuring device 15 is designed as an optoelectronic measuring device.
  • a measuring device designed with a Hall generator can also be provided, which consists of a Hall sensor as a receiver and a permanent magnet as a transmitter. These components face each other at a short distance on the stationary or rotating component of the device.
  • the Hall sensor must not be disturbed by the stray electrical field of the electric motor 2. Therefore, a correspondingly insensitive Hall sensor will be used and / or the dpn Hall sensor will be positioned or rotated in such a way that it comes from the electrical stray field of the electric motor 2.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Details Of Measuring Devices (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Indicating Measured Values (AREA)

Abstract

L'invention concerne un dispositif pour afficher des caractères et/ou des symboles alphanumeriques, comportant un boîtier (19) à symétrie de rotation constitué d'un matériau transparent et/ou translucide et contenant un moteur électrique (2) pourvu d'un arbre moteur (20) tournant autour d'un axe de symétrie (21); un support (5) solidaire en rotation de l'arbre moteur (20) et sur lequel est fixée au moins une rangée de diodes électroluminescentes ou de groupes de diodes électroluminescentes (6) qui sont sensiblement perpendiculaires à l'arbre moteur (20); et une carte de circuits (40) dotée d'un circuit de commande pour les diodes électroluminescentes (6). Dans le but d'améliorer la commande du dispositif d'affichage et des diodes électroluminescentes, et de simplifier la fabrication en série au niveau technique, le dispositif d'affichage possède également un système de mesure opto-électronique (15) constitué d'un émetteur et d'un récepteur pour mesurer la vitesse de rotation du support (5) en vue d'une synchronisation de la commande des diodes électroluminescentes (6) avec la vitesse de rotation du support (5). L'émetteur et le récepteur de ce dispositif de mesure sont fixés d'une part sur un élément rotatif du dispositif et d'autre part sur un élément fixe du dispositif, en regard l'un de l'autre et avec un faible espacement. Grâce à un logiciel, le signal capté par le récepteur peut être converti en un signal rectangulaire clair dépourvu d'interférences externes de manière à permettre la synchronisation de la commande des diodes électroluminescentes avec la vitesse de rotation du support (5) mesurée avec précision ou avec approximation. Le dispositif comporte également un élément d'équilibrage mécanique (7, 8) situé en regard du support (5) par rapport à l'axe de symétrie (21). Cet élément d'équilibrage (7, 8) est une tige (7) de section quelconque, dont la longueur utile peut être raccourcie, cette tige étant, en service, redressée en une position sensiblement horizontale.
PCT/EP1997/003145 1996-06-26 1997-06-17 Dispositif pour afficher des caracteres et des symboles alphanumeriques WO1997050070A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU32598/97A AU3259897A (en) 1996-06-26 1997-06-17 Device for displaying alphanumeric characters and symbols
EP97928220A EP1004110B1 (fr) 1996-06-26 1997-06-17 Dispositif pour afficher des caracteres et des symboles alphanumeriques
DE59704216T DE59704216D1 (de) 1996-06-26 1997-06-17 Vorrichtung zur anzeige von alpha-numerischen zeichen und bildzeichen
AT97928220T ATE203846T1 (de) 1996-06-26 1997-06-17 Vorrichtung zur anzeige von alpha-numerischen zeichen und bildzeichen

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE29611155U DE29611155U1 (de) 1996-06-26 1996-06-26 Vorrichtung zur Anzeige von alpha-numerischen Zeichen und von Bildzeichen
DE29611155.4 1996-06-26
DE29621296U DE29621296U1 (de) 1996-12-07 1996-12-07 Vorrichtung zur Anzeige von alpha-numerischen Zeichen und/oder Bildzeichen
DE29621296.2 1996-12-07

Publications (1)

Publication Number Publication Date
WO1997050070A1 true WO1997050070A1 (fr) 1997-12-31

Family

ID=26059122

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/003145 WO1997050070A1 (fr) 1996-06-26 1997-06-17 Dispositif pour afficher des caracteres et des symboles alphanumeriques

Country Status (6)

Country Link
EP (1) EP1004110B1 (fr)
AT (1) ATE203846T1 (fr)
AU (1) AU3259897A (fr)
DE (1) DE59704216D1 (fr)
ES (1) ES2162307T3 (fr)
WO (1) WO1997050070A1 (fr)

Cited By (21)

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GB2326513A (en) * 1997-06-21 1998-12-23 Adflash Limited Rotating body display
US6380686B1 (en) 1998-06-03 2002-04-30 Prochips Technology Inc. Method and apparatus for displaying characters and/or images
US6816137B2 (en) 2001-02-15 2004-11-09 Newscanner, Plc Visual message display device
US6943762B2 (en) 2001-02-15 2005-09-13 Newscanner, Plc Visual message display device
EP1043189A3 (fr) * 1999-04-06 2005-11-16 911 Emergency Products, Inc. Remplacement d'un assemblage de LED et modulation de l'intensité de la source lumineuse
WO2006021788A1 (fr) * 2004-08-26 2006-03-02 Litelogic Limited Dispositif d'affichage
US7484870B2 (en) 1999-06-08 2009-02-03 911Ep, Inc. LED light stick assembly
US8886045B2 (en) 2007-05-24 2014-11-11 Federal Law Enforcement Development Services, Inc. LED light broad band over power line communication system
US8890655B2 (en) 2002-08-23 2014-11-18 Federal Law Enforcement Development Services, Inc. Intelligent observation and identification database system
US8890773B1 (en) 2009-04-01 2014-11-18 Federal Law Enforcement Development Services, Inc. Visible light transceiver glasses
US8902076B2 (en) 2000-11-15 2014-12-02 Federal Law Enforcement Development Services, Inc. LED light communication system
US9100124B2 (en) 2007-05-24 2015-08-04 Federal Law Enforcement Development Services, Inc. LED Light Fixture
US9258864B2 (en) 2007-05-24 2016-02-09 Federal Law Enforcement Development Services, Inc. LED light control and management system
US9265112B2 (en) 2013-03-13 2016-02-16 Federal Law Enforcement Development Services, Inc. LED light control and management system
US9294198B2 (en) 2007-05-24 2016-03-22 Federal Law Enforcement Development Services, Inc. Pulsed light communication key
US9414458B2 (en) 2007-05-24 2016-08-09 Federal Law Enforcement Development Services, Inc. LED light control assembly and system
US9455783B2 (en) 2013-05-06 2016-09-27 Federal Law Enforcement Development Services, Inc. Network security and variable pulse wave form with continuous communication
CN108648647A (zh) * 2018-07-13 2018-10-12 珠海达其昌电子有限公司 一种旋转显示器及其装配方法
US10448472B2 (en) 2015-08-11 2019-10-15 Federal Law Enforcement Development Services, Inc. Function disabler device and system
US11265082B2 (en) 2007-05-24 2022-03-01 Federal Law Enforcement Development Services, Inc. LED light control assembly and system
US11783345B2 (en) 2014-01-15 2023-10-10 Federal Law Enforcement Development Services, Inc. Cyber life electronic networking and commerce operating exchange

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WO2008074899A1 (fr) * 2006-12-21 2008-06-26 Metalplast Cfe, S.L. Affichage d'information tridimensionnelle

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Cited By (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2326513B (en) * 1997-06-21 2001-12-05 Adflash Ltd Rotating body display
GB2326513A (en) * 1997-06-21 1998-12-23 Adflash Limited Rotating body display
US6380686B1 (en) 1998-06-03 2002-04-30 Prochips Technology Inc. Method and apparatus for displaying characters and/or images
EP1043189A3 (fr) * 1999-04-06 2005-11-16 911 Emergency Products, Inc. Remplacement d'un assemblage de LED et modulation de l'intensité de la source lumineuse
US7484870B2 (en) 1999-06-08 2009-02-03 911Ep, Inc. LED light stick assembly
US8902076B2 (en) 2000-11-15 2014-12-02 Federal Law Enforcement Development Services, Inc. LED light communication system
US9413457B2 (en) 2000-11-15 2016-08-09 Federal Law Enforcement Development Services, Inc. LED light communication system
US6816137B2 (en) 2001-02-15 2004-11-09 Newscanner, Plc Visual message display device
US6943762B2 (en) 2001-02-15 2005-09-13 Newscanner, Plc Visual message display device
US8890655B2 (en) 2002-08-23 2014-11-18 Federal Law Enforcement Development Services, Inc. Intelligent observation and identification database system
US9318009B2 (en) 2002-08-23 2016-04-19 Federal Law Enforcement Development Services, Inc. Intelligent observation and identification database system
WO2006021788A1 (fr) * 2004-08-26 2006-03-02 Litelogic Limited Dispositif d'affichage
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DE59704216D1 (de) 2001-09-06
AU3259897A (en) 1998-01-14
ATE203846T1 (de) 2001-08-15
ES2162307T3 (es) 2001-12-16
EP1004110A1 (fr) 2000-05-31
EP1004110B1 (fr) 2001-08-01

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