Lens and light emitting module for surface illumination
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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Abstract
A light emitting module includes a circuit board, light emitting elements disposed on the circuit board, each light emitting element including 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 form the light emitting elements. The lens includes a concave part having a light incident surface and an upper surface through which the light incident on the lens is emitted, and at least one of the light incident surface and the upper surface includes sections disposed at least 15° from a central axis and sequentially connected in a first direction.
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Citations
20 Claims
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1. A light emitting module, comprising:
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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; andthe 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A lens configured to diffuse light emitted from light emitting elements, the lens comprising:
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a concave part defining a light incident surface; and an upper surface through which light incident on the lens exits the lens, wherein; 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. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification