Multi-cavities light emitting device

Abstract

A Multi-Cavities light emitting device includes a base, a blue light emitting unit, at least two red light emitting units, a light conversion layer and a lens, and the base has a central slot and at least two side slots symmetrically formed on external sides of the central slot, and the blue light emitting unit is installed in the central slot, and the two red light emitting units are installed in the two side slots respectively, and the light conversion layer is covered onto the blue light emitting unit, and the lens is protruded from the base and sealed onto the central slot and at least two side slots, so as to achieve the effects of improving the light extraction efficiency of an LED chip and the yield rate of the product and reducing the overall assembling time and cost.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a light emitting device, in particular to a Multi-Cavities light emitting device capable of emitting a warm white light.BACKGROUND OF THE INVENTION[0002]With the features of low power consumption, good power-saving effect, long service life, small volume and quick response, light emitting diodes (LED) have gradually replaced traditional tungsten bulbs, fluorescent lamps or mercury lamps, and the LEDs are applied extensively in various types of lamps.[0003]With reference to FIGS. 1 and 2 for a schematic planar view and a partial cross-sectional view of a conventional LED module respectively, the LED module 1a comprises a substrate 10a, a plurality of LED chips (such as blue LED chips) 20a, a fluorescent plastic (such as a yellow fluorescent plastic) 30a and a plurality of lenses 40a, wherein the substrate 10a includes a plurality of slots 11a arranged in a matrix, and the LED chips 20a are installed into the slots 11a respe...

AI Technical Summary

Benefits of technology

The present invention provides a Multi-Cavities light emitting device that improves the light extraction efficiency of an LED chip, increases the yield rate of the product, and reduces the overall assembling time and cost. The device includes at least three slots on the base, the blue LED chip and red LED chip are installed into each corresponding slot, and the blue LED chip is covered by a plastic layer containing a yellow or green phosphor, to emit a warm white light. The red LED chip is not covered with a fluorescent plastic layer, ensuring the light extraction efficiency of the red LED chip is not affected. The lens is integrally sealed onto the central slot and at least two side slots, reducing the manufacturing time and labor, and the overall cost. The invention minimizes the light emitting area, facilitating a secondary optical design at a later stage, with practical uses in the present technology.

Problems solved by technology

In addition, a large number of slots 11a are densely disposed, so that a substrate with a larger area is required, and the strength of the substrate 10a will be affected adversely, and the substrate 10a may be cracked or broken easily to result in a low yield rate.

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