Display device using a discharge lamp

Claim 2

Disply device using a discharge lamp comprising: a discharge lamp formed by a glass tube in which inert gas is charged, comprising a pair of electrodes one of which is provided within said glass tube and the other is formed of transparent electrically conductive film deposited on the exterior surface of and extending over the length of said glass tube whereby said discharge lamp is energized for illumination by a source of pulse or AC voltage of a frequency not greater than about 30 kHz being applied between said two electrodes.

Claim 3

The discharge lamp as defined in claim 1 including a fluroescent film coated on the inner surface of said glass tube.

Claim 4

Display device using a discharge lamp comprising: a discharge lamp formed by a glass tube in which inert gas is charged, said discharge lamp having a pair of electrodes one of which is provided within said glass tube and the other is provided outside of said glass tube; a display unit for displaying characters, numerals or symbols comprising a surface plate including a back portion having at least two electrically conductvie segments, a boosting transformer mounted within said display unit for boosting pulse signals or AC signals, and one or more discharge lamps arranged on said surface plate; a display panel for displaying at least a display unit; said display panel comprising at least two electrically conductive and magnetizable feeder plates adapted to be connected to an external power supply for connecting said boosting transformer to the external power supply, said feeder plates being arranged in each position corresponding to said electrically conductive segments mounted on the back portion of said display unit, said feeder plates being electrically connected to said electrically conductive segments when at least a display unit is engaged with said display panel; and means for magnetically engaging said display unit with said display panel with the conductive segments contacting the feeder plates; whereby pulse signals or AC signals from a pulse signal or AC signal generating means being supplied through said feeder plates, electrically conductive segments and boosting transformer in said display unit to both electrodes of said discharge lamp cause said discharge lamp to be discharged.

Claim 5

Display device using a discharge lamp comprising: a discharge lamp formed by a glass tube in which inert gas is charged, said discharge lamp having a pair of electrodes one of which is provided within said glass tube and the other is provided outside of said glass tube; a display unit for displaying characters, numerals or symbols comprising a surface plate including a back portion having at least two electrically conductvie segments, a boosting transformer mounted within said display unit for boosting pulse signals or AC signals, and one or more discharge lamps arranged on said surface plate; a display panel for displaying at least a display unit; said display panel comprising at least two electrically conductive and magnetizable feeder plates adapted to be connected to an external power supply for connecting said boosting transformer to the external power supply, said feeder plates being arranged in each position corresponding to said electrically conductive segments mounted on the back portion of said display unit, said feeder plates being electrically connected to said electrically conductive segments when at least a display unit is engaged with said display panel; and means for magnetically engaging said display unit with said display panel with the conductive segments contacting the feeder plates; whereby pulse signals or AC signals from a pulse signal or AC signal generating means being supplied through said feeder plates, electrically conductive segments and boosting transformer in said display unit to both electrodes of said discharge lamp cause said discharge lamp to be discharged.

Claim 6

Display device using a discharge lamp as defined in claim 3 further including: a pulse signal or AC signal generating means for supplying pulse signals or AC signals to said pair of electrodes of said discharge lamp for discharging said lamp; said boosting transformer being supplied through transistor means; means for supplying electrical power to said transistor in said display unit; and said display panel being constructed for displaying a plurality of said display units to present a message indicated by the combination of characters, numerals or symbols represented by said display units and including at least three feeder plates arranged in each position corresponding to said electrically conductive segments mounted on the back portion of said display unit.

Claim 7

Display device using a discharge lamp as defined in claim 4 further including: a pulse signal or AC signal generating means for supplying pulse signals or AC signals to both electrodes of said discharge lamp for discharging said lamp; control means for supplying pulse signals or AC signals alternately at every give period of time, said means being connected to said pulse signal or AC signal generating means; and said display panel being constructed for displaying at least two different messages at every given period of time.

Claim 8

Display device using a discharge lamp as defined in claim 4 further including means for on-off controlling the firing of said discharge lamp by intermittently supplying pulse signals or AC signals through said feeder plates and electrically conductive segments to said transistor.

Claim 9

Display device using a discharge lamp as defined in claim 4 further including a switching means for continuously firing said discharge lamp or on-off controlling the firing of said discharge lamp by continuously or intermittently supplying pulse signals or AC signals through said control means to said transistor, said switching means being arranged between said control means and transistor.

Claim 10

Display device as defined in claim 3 wherein: said boosting transformer is supplied through transistor means; means for supplying electrical power to said transistor in said display unit; said display unit comprising at least three electrically conductive segments; said display panel comprising at least three feeder plates arranged in each position corresponding to said electrically conductive segments mounted on the back portion of said display unit; and said display panel comprising means for displaying a message comprised by a plurality of display units comprising characters, numerals or symbols.

Claim 11

Display device as defined in claim 8 wherein said display units comprising said plurality of display units are different in shape and length.