EP 1004110 A1 20000531 - DEVICE FOR DISPLAYING ALPHANUMERIC CHARACTERS AND SYMBOLS
Title (en)
DEVICE FOR DISPLAYING ALPHANUMERIC CHARACTERS AND SYMBOLS
Title (de)
VORRICHTUNG ZUR ANZEIGE VON ALPHA-NUMERISCHEN ZEICHEN UND BILDZEICHEN
Title (fr)
DISPOSITIF POUR AFFICHER DES CARACTERES ET DES SYMBOLES ALPHANUMERIQUES
Publication
Application
Priority
- DE 29611155 U 19960626
- DE 29621296 U 19961207
- EP 9703145 W 19970617
Abstract (en)
[origin: WO9750070A1] The invention concerns a device for displaying alphanumeric characters and/or symbols, with a rotationally symmetric housing (19) of a transparent and/or light transparent material; the housing (19) containing an electric motor (2) with a motor shaft (20) which revolves around a symmetrical axis (21); a carrier (5) which is rotationally fixed to the motor shaft (20) and on which is/are attached at least one row of light-emitting diodes or groups of light-emitting diodes (6) that are substantially perpendicular to the motor shaft (20); and a circuit board (4) with a control circuit for the light-emitting diodes (6). To improve control of the display device and the LED's and to create a technically simple series production, the display device also has an opto-electronic measuring device (15) made of a transmitter and receiver, to measure the rotating speed of the carrier (5) for synchronising control of the light-emitting diodes (6) with the rotating speed of the carrier (5), the transmitter and receiver of which are fixed to a rotating structural part of the device on the one hand to a stationary structural part of the device on the other hand, opposite and at a short distance apart. With the use of software the signal picked up by the receiver can be converted into a clear square-wave signal, free from external interference so that the LED-control can be synchronised with the exactly or almost exactly measured rotating speed of the carrier (5). The device according to the invention also contains a mechanical balancing element (7, 8) opposite the carrier (5) in relation to the symmetrical axis (21), wherein the balancing element (7, 8) is a rod (7) of any cross-section, the operating length of which can be shortened, the rod being raised into a substantially horizontal position during operating.
IPC 1-7
IPC 8 full level
CPC (source: EP)
G09F 9/33 (2013.01); G09G 3/001 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9750070 A1 19971231; AT E203846 T1 20010815; AU 3259897 A 19980114; DE 59704216 D1 20010906; EP 1004110 A1 20000531; EP 1004110 B1 20010801; ES 2162307 T3 20011216
DOCDB simple family (application)
EP 9703145 W 19970617; AT 97928220 T 19970617; AU 3259897 A 19970617; DE 59704216 T 19970617; EP 97928220 A 19970617; ES 97928220 T 19970617