Electronic scan methods for plasma displays Patent #: 3947722
ApplicationNo. 06/299613 filed on 09/04/1981
US Classes:345/43, Mask or electrode shape313/515, With character-shaped envelope313/519, Multiple display (i.e., side-by-side)315/254, Transformer in the supply circuit315/276, Transformer in the supply circuit340/815.53, Lighted alphanumeric or character indicator matrix345/1.3, Tiling or modular adjacent displays40/545, Gas filled tube40/550Light bulbs arranged in the outline of indicia
ExaminersPrimary: Trafton, David L.
Attorney, Agent or Firm
International ClassesG09F 13/00 (20060101)
G09F 13/26 (20060101)
Foreign Application Priority Data1980-09-12 JP
AbstractDisplay device using a discharge lamp for displaying a series of message formed of characters, numerals or symbols by combining various kinds of discharge lamps which are different in shape and size. Inert gas is charged in a glass tube of the discharge lamp, one of the electrodes is provided within the glass tube and the other is provided outside of the glass tube. Pulse signal or AC signal generator is provided and serves to supply such signals to both electrodes. The various kinds of discharge lamps are combined and arranged on the surface plate of a display unit. A plurality of display units are combined and magnetically connected to a display panel. A plurality of electrically conductive segments mounted on the back portion of the display unit are electrically connected to a plurality of feeder plates. Additionally, there are provided in the display unit a boosting transformer for boosting pulse signals or AC signals to be supplied, a transistor, and power supply. Furthermore, the present device includes a control means for on-off controlling the firing of the discharge lamp alternately at every given period of time and/or a switching means for continuously firing the discharge lamp or on-off controlling the firing of the discharge lamp by continuously or intermittently supplying pulse signals or AC signals through the control means to the transistor.