Flip chip unpackaged light source lens

Abstract

The invention discloses a flip chip unpackaged light source lens. The lens comprises a lens body, wherein the bottom projection is circular; a light entrance hole is formed in the center of the bottom; the bottom surface of the lens body is symmetrically provided with a plurality of downwardly protruding mounting columns; the part at the periphery of an opening of the light entrance hole sinks to form an inverted frustum-shaped sunken part; the sinking height of the sunken part does not exceed the length of the mounting columns; the surface of the sunken part and the bottom surface of the lens body are both provided with non-planar microscopic structures for light diffuse reflection; the mounting columns are fixedly glued on a base band, an LED (Light Emitting Diode) light source is accommodated in the light entrance hole, and the sunken part is covered at the periphery of the LED light source, so the lens can completely act on light emitted by the LED light source to improve the utilization rate of the light source; glue is prevented from introducing into the bottom surface of the lens body so as not to corrode the non-planar microscopic structure because of a gap existing between the mounting columns and the sunken part; the assembly reliability is high and the structure is concise.

Description

technical field [0001] The invention relates to the technical field of LED light source lenses, in particular to a flip-chip unpackaged light source lens. Background technique [0002] Light Emitting Diode (LED for short) has been widely used as a lighting source. Due to the special light-emitting principle of light-emitting diodes, the energy consumed by them is far lower than that of ordinary incandescent lamps at the same brightness, and they have the advantages of long life and no pollution, so they have attractive applications in the fields of lighting and backlighting. prospect. LED is a point light source. When it is used for lighting, a lens needs to be placed in front of the LED to reduce the divergence angle of the LED light, so that the light is concentrated near the optical axis and emitted. [0003] In order to avoid affecting the luminous efficiency due to the electrodes occupying the light-emitting area in the front-mounted chip, a flip-chip structure has em...

AI Technical Summary

Problems solved by technology

[0004] However, due to the small structural size of the flip-chip unpackaged light source, the protrusion height of the chip protruding from the substrate is small, and the traditional lens structure is difficult to adapt to its structural changes, resulting in the inability to give full play to the advantages of the flip-chip

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