The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 2023
Filed:
Jun. 08, 2022
Hangzhou Hangke Optoelectronics Co., Ltd., Hangzhou, CN;
Qianjun Yan, Hangzhou, CN;
Yaoxing Wang, Hangzhou, CN;
Zhaozhang Zheng, Hangzhou, CN;
Lingli Ma, Hangzhou, CN;
Hangzhou Hangke Optoelectronics Co., Ltd., Hangzhou, CN;
Abstract
A manufacturing method of an LED filament and a manufacturing method of a bulb are provided. The steps are as follows: step S, preparing a support; step S, fixing chips; step S, performing a first baking and performing a lighting test after cooling; step S, 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 S, 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.