Manufacturing method of LED filament and manufacturing method of bulb

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United States of America Patent

PATENT NO 11662065
SERIAL NO

17806001

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Abstract

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A manufacturing method of an LED filament and a manufacturing method of a bulb are provided. The steps are as follows: step S1, preparing a support; step S2, fixing chips; step S3, performing a first baking and performing a lighting test after cooling; step S4, dispensing a glue in which a semi-finished product is covered with a covering glue, and a viscosity of the covering glue used is 5000 to 50000 mPa·S; and step S5, performing a second baking. According to the disclosure, the preparation of the LED filament is completed through support preparing, chip fixing, the first baking, dispensing and the second baking, and the covering glue selected during dispensing has good fluidity, and the fluorescent powders mixed in the covering glue can be uniformly dispersed, thus preventing precipitation or agglomeration and ensuring good light distribution.

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Patent Owner(s)

  • HANGZHOU HANGKE OPTOELECTRONICS CO., LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ma, Lingli Hangzhou, CN 11 10
Wang, Yaoxing Hangzhou, CN 2 29
Yan, Qianjun Hangzhou, CN 12 17
Zheng, Zhaozhang Hangzhou, CN 12 17

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