Needle cylinder device and method for reducing settlement and improving light color consistency

Abstract

The invention discloses a needle cylinder device capable of reducing sedimentation and improving light color consistency. The needle cylinder device comprises a dispensing needle cylinder and a circulation pipeline. A glue guide opening is formed in the lower end of the glue dispensing needle cylinder, and a glue return opening is formed in the upper end of the glue dispensing needle cylinder; the circulating pipeline comprises a circulating pipe and a fluid driving device, wherein the two ends of the circulating pipe are connected with the glue guiding opening and the glue returning opening respectively, and the fluid driving device is arranged on the circulating pipe and used for driving fluid in the circulating pipe to flow from the glue guiding opening to the glue returning opening. According to the needle cylinder device capable of reducing sedimentation and improving light color consistency, the circulation pipeline is arranged, fluorescent powder glue in the glue dispensing needle cylinder can be pumped to the upper end of the glue dispensing needle cylinder from the lower end of the glue dispensing needle cylinder, and therefore the fluorescent powder glue in the glue dispensing needle cylinder circularly flows and is evenly mixed, the fluorescent powder glue is prevented from precipitating in the glue dispensing process, and the quality of the fluorescent powder glue is improved. And the light color consistency is ensured, and the yield is improved.

Description

technical field [0001] The invention belongs to the technical field of LED packaging, and in particular relates to a syringe device and method for reducing sedimentation and improving light color consistency. Background technique [0002] LED is a solid-state semiconductor device that can convert electrical energy into visible light. It can directly convert electricity into light. Because it has the advantages of environmental protection, long life, high efficiency and energy saving, simple structure, small size, and light weight, it is generally considered , as the fastest growing light source product, it is bound to replace almost all traditional lighting products in the near future. [0003] Phosphor powder is an important powder material that is indispensable for the production of lighting LEDs. Especially in the method of making white light LEDs, phosphor powder plays a very critical role. Its performance directly affects the brightness, color coordinates, color tempera...

AI Technical Summary

Problems solved by technology

[0004] The Chinese invention patent document with the publication number CN104465949A discloses a glue dispensing method in LED lamp packaging. The steps include dispensing fluorescent glue, and then pointing it to the upper part of the transparent glue in the bracket bowl until it is filled with the bracket bowl. The dried bracket bowl cup is placed in the cooling room until the temperature of the bracket bowl cup reaches normal temperature, which solves the problem of yellow halo easily produced in the LED packaging process in the prior art, but in the actual dispensing process, the silicone resin After mixing with the phosphor, precipitation will occur in the process of container glueing over time, resulting in changes in the weight of the phosphor before and after, and differences in the effect of chip lighting and excitation, resulting in discrete distribution of color blocks on the CIE map and poor light and color consistency. , the problem of lower yield

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