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Lens and light emitting module for surface illumination

  • US 10,281,111 B2
  • Filed: 12/02/2016
  • Issued: 05/07/2019
  • Est. Priority Date: 08/26/2013
  • Status: Active Grant
First Claim
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1. A light emitting module, comprising:

  • a circuit board;

    light emitting elements disposed on the circuit board, each light emitting element comprising;

    light emitting diode chips; and

    a wavelength conversion layer coated on the light emitting diode chips; and

    a lens disposed on the light emitting elements and configured to diffuse light emitted from the light emitting elements,wherein;

    the lens comprises a concave part comprising a light incident surface and an upper surface through which the light exits out from the lens;

    the upper surface comprises a concave portion and a convex portion;

    at least one of the concave portion and the convex portion comprises sections, at least two of the sections having different curvatures from each other; and

    the at least two of the sections each has a thickness equal to or greater than 1 μ

    m, and less than the width of the light emitting element.

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