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Display lamp and method

  • US 6,488,393 B1
  • Filed: 10/23/2000
  • Issued: 12/03/2002
  • Est. Priority Date: 10/23/2000
  • Status: Expired due to Fees
First Claim
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1. A display apparatus comprising:

  • a light source, a vessel containing a supply of a light-transmitting liquid having an upper surface at a predetermined level, a disturbance system for disturbing the liquid surface from thereabove without disturbing the vessel and without significantly changing the predetermined level, and a directing structure directing light from the source through the liquid and then through the liquid surface and then onto a display surface spaced from the vessel for projecting onto the display surface a visual wave pattern which moves in accordance with disturbance of the liquid surface.

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