Light guide stick type white light light-emitting diode (LED) packaging structure

Abstract

The invention discloses a light guide stick type white light light-emitting diode (LED) packaging structure which comprises a transparent light guide stick, fluorescent powder, an LED chip, a reflector, a fluorescent powder film and an electrode. The fluorescent powder is packaged in the transparent light guide stick, the LED chip and the reflector are packaged at one end of the transparent light guide stick, the fluorescent powder film is surrounded on the circumferential surface of one end of the transparent light guide stick, and the electrode is connected with the LED chip. The fluorescent powder film and the LED chip are arranged on the same side of the transparent light guide stick, and the LED chip is placed inside a ring which is formed by the fluorescent powder film in a surrounding mode. The normal direction of the LED chip is parallel to the axial direction of the transparent light guide stick. The mirror surface of the reflector is perpendicular to the axial direction of the transparent light guide stick. By means of the light guide stick type white light LED packaging structure, light scattering loss can be lowered, white light efficiency is improved, light color performance can be regulated by changing the length of the transparent light guide stick, meanwhile, the distance of the fluorescent powder and the chip is increased, the performance degradation of the fluorescent powder caused by heat generated by the chip is reduced, and the white light efficiency is further improved.

Description

technical field [0001] The invention belongs to the technical field of optoelectronics, and relates to a packaging structure of a white light emitting diode (LED), in particular to a packaging structure of a total reflection lateral light emission type white LED. Background technique [0002] LEDs are semiconductor electronic components that emit light. Their physical properties are well known and they are widely used in the lighting and display industries. [0003] The current common white light LED technology is to use the blue light generated by the LED chip to excite the phosphor powder coated on or around the chip. After the phosphor powder is excited, it emits green, yellow or red light, which is matched with the blue light of the LED chip. Produces white light. In addition, there is a similar white light LED technology, which uses ultraviolet light generated by ultraviolet LED chips to excite phosphors coated on or around the chip to emit blue, green or red light and...

AI Technical Summary

Problems solved by technology

However, in this method, the light emitted by the chip and the phosphor still needs to pass through the high-concentration phosphor layer, which cannot significantly increase the light output ratio.

[0006] In summary, there are serious problems in the existing packaging technology of white light LEDs using phosphor technology, that is, a large amount of light loss due to scattering and blocking of the phosphor layer. If this problem can be solved, it will be able to greatly improve Light output efficiency of white LED

Images