Novel LED packaging structure

Abstract

The invention discloses a novel light emitting diode (LED) packaging structure. The structure comprises: a pedestal; a recessed cavity, which is formed in the pedestal; a heat sink, which is fixed in the recessed cavity; a cup bowl, which is formed on the heat sink; and an LED chip, which is fixed in the cup bowl. Besides, a pair of conductive feet are extended and are fixed in the pedestal; the LED chip is electrically connected with the conductive feet; a lens is formed on the pedestal and enables the LED chip and a part of conductive feet to be sealedly capped; and an external surface of the lens are provided with a layer of phosphor coating. According to the LED packaging structure provided in the invention, a traditional LED packaging mode is broken; a phosphor coating is directly transferred from an original chip surface to a surface of a lens, so that the phosphor coating is thoroughly far away from an LED chip and a luminous decay is substantially reduced; moreover, a shape and a thickness of the phosphor coating can be controlled accurately and an excitation area of the phosphor coating can be enlarged, so that an occurrence of a yellow ring can be avoided, a light extraction efficiency is improved and color temperatures of the phosphor coating are highly consistent.

Description

【Technical field】 [0001] The invention relates to an LED structure, in particular to a white light LED packaging structure. 【Background technique】 [0002] Light Emitting Diode (LED) has the characteristics of power saving, light weight and long life. At present, it has achieved the goals of high brightness, multi-color and high luminous efficiency. There are many market changes. In flat panel display products, LED has become the main application market for mobile phone backlight. In the future, LED will be the main axis of development towards large-size flat panel display backlight. Luminous efficiency is the goal of efforts. At present, white light-emitting diode is a kind of light-emitting diode widely used in the lighting field. It excites the fluorescent package mixed with phosphor powder to emit light through the monochromatic light emitted by the chip to generate white light. The traditional package structure of white light-emitting diode is to directly integrate the...

AI Technical Summary

Problems solved by technology

[0003] In view of the technical problems existing in the prior art such as fast LED light decay, uneven light spots, unbalanced color temperature, and low light extraction efficiency, the purpose of the present invention is to provide a LED with small light decay, good uniformity of light spots, balanced color temperature, and high light output efficiency. The new LED package structure

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