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SOLID STATE LAMP ASSEMBLY

  • US 3,676,668 A
  • Filed: 12/29/1969
  • Issued: 07/11/1972
  • Est. Priority Date: 12/29/1969
  • Status: Expired due to Term
First Claim
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1. A solid state lamp comprising a substantially flat lightemitting diode element having a top surface and a bottom surface, said diode element containing means for producing light internally thereof directed upwardly toward said top surface and downwardly toward said bottom surface, mounting means to which said element is attached at said bottom surface thereof for supporting said element and for making an electrical connection therewith, and electrical contact means at a relatively small area of said top surface, said top surface being substantially unobstructed optically to the emission of light upwardly therefrom, wherein the improvement comprises means for providing said supporting and electrical attachment to only a portion of said bottom surface of the light-emitting element whereby a major portion of said bottom surface is bounded by air or other low optical refractive index material thereby minimizing the optical critical angle at said bottom surface and maximizing the internal reflection of said internally produced light at said bottom surface thereby increasing the amount of light emitted upwardly from said top surface of the diode element.

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