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Motor vehicle lighting/indicating apparatus using luminescent discharge

  • US 5,589,730 A
  • Filed: 10/12/1993
  • Issued: 12/31/1996
  • Est. Priority Date: 10/12/1992
  • Status: Expired due to Fees
First Claim
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1. A lighting or indicating apparatus for a vehicle comprising a light transmitting element and a base element disposed behind said light transmitting element, wherein the light transmitting element constitutes an outer wall having at least one surface which is at least partly curved, the base element constitutes an inner wall, said outer and inner walls together define a thin envelope defining at least one closed cavity within the outer and inner walls, said at least one closed cavity being gastight for containing gas under low pressure, and the apparatus further includes at least two electrodes situated in the at least one closed cavity, and means connected with the electrodes for applying a voltage for starting and maintaining a luminescent gas discharge in said cavity, said apparatus defining at least one zone having at least two superimposed cavities each containing a gas under low pressure.

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