Title:
METHOD OF MAKING LED LIGHT BULB WITH THERMAL RADIATION FILAMENTS
Document Type and Number:
WIPO Patent Application WO/2019/141155
Kind Code:
A1
Abstract:
A method of making a LED light bulb (50) with thermal radiation filaments (40) contains steps of: A. providing a substrate (10) which includes multiple conductive portions (12) formed on two ends of the substrate (10) respectively so as to electrically connect with an electronic circuit; B. molding LED chips (21), wires (23), and phosphors (22) on a front face of the substrate (10) so as to produce a LED filament sheet (20); C. forming a thermal radiation dissipation film (30) on a back face (11) of the substrate (10) before or after producing the LED filament sheet (20); D. cutting the substrate (10) into the thermal radiation filaments (40), wherein each of the thermal radiation filaments (40) has a part of the thermal radiation dissipation film (30), a part of the LED filament sheet (20), and parts of the multiple conductive portions (12) respectively; and E. fixing the thermal radiation filaments (40) into the LED light bulb (50).
Inventors:
LAI CHUNG-PING (CN)
Application Number:
PCT/CN2019/071710
Publication Date:
July 25, 2019
Filing Date:
January 15, 2019
Export Citation:
Assignee:
BGT MAT LIMITED (GB)
LAI CHUNG PING (CN)
LAI CHUNG PING (CN)
International Classes:
F21K9/232
Foreign References:
| CN106482003A | 2017-03-08 | |||
| GB2529445A | 2016-02-24 | |||
| CN107035978A | 2017-08-11 | |||
| CN105927950A | 2016-09-07 | |||
| CN208154130U | 2018-11-27 | |||
| CN205877783U | 2017-01-11 | |||
| US20140254180A1 | 2014-09-11 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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