Color temperature adjustable LED integrated light source

Abstract

The invention provides a color temperature adjustable LED integrated light source. The color temperature adjustable LED integrated light source comprises: a substrate; a light source which comprises an array composed of at least two white-light LEDs coated with different fluorescent materials for realizing different color temperatures, wherein each white-light LED is coated with a corresponding fluorescent material and then is packaged on the substrate; and a control unit which is installed on the substrate for controlling the luminescence effect of a lamp group composed of the white-light LEDs with the different color temperatures. According to the invention, through a mode of respectively coating the white-light LEDs with the fluorescent materials, the effect of obtaining high- luminous flux output on a small luminescence surface and color temperature adjustability are achieved. By use of an array type COB packaging mode, the space occupied by the white-light LEDs is reduced, more space is reserved on the substrate for a peripheral circuit, and the expandability is improved. By use of the LED packaging mode, after a support is omitted, light attenuation brought by aging of a support material can be avoided, and the long-term reliability of an optical engine is guaranteed.

Description

technical field [0001] The invention relates to the lighting field, in particular to an LED integrated light source with adjustable color temperature and compact structure. Background technique [0002] In the prior art, the high-voltage linear drive LED light engine module without electrolytic capacitors is used, and the rectifier bridge, drive circuit and LED light source are integrated on the same substrate, which can make the design of the lamp structure more flexible and can be Reduce material costs and have a high cost performance. [0003] At present, the light sources used by light engines can be roughly divided into two categories: surface mount light sources and CoB light sources. Mounted light sources are generally used for light source modules with large light-emitting surfaces. Commonly used are 5630, 2835, 3030 and other types of lamp beads. When the lamp beads are packaged, it is necessary to use a silver-plated metal bracket to evenly mount the lamp beads on...

AI Technical Summary

Problems solved by technology

Mounted light sources are generally used for light source modules with large light-emitting surfaces. Commonly used are 5630, 2835, 3030 and other types of lamp beads. When the lamp beads are packaged, it is necessary to use a silver-plated metal bracket to evenly mount the lamp beads on the substrate. On the other hand, the metal bracket may oxidize the silver plating layer after long-term use, thereby reducing the luminous flux output

[0004] The CoB light source is generally used for light source modules with a small light-emitting surface. Usually, multiple blue LEDs are combined into a light-emitting array through substrate lines or metal bonds, and then sealed with fluorescent glue. This packaging method makes this type of light source only It is the same color temperature, and the function of color temperature cannot be realized

In addition, the LEDs in the CoB light source are all sealed together. When a single LED is damaged, it cannot be repaired independently, which may cause the entire light source board to fail to work.

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