US Patent No. 10,989,363

LED FILAMENT AND LED BULB WITH LED FILAMENT


Patent No. 10,989,363
Issue Date April 27, 2021
Title Led Filament And Led Bulb With Led Filament
Inventorship Chien-Li Yang, Xiamen (CN)
Yu-Chun Chung, Xiamen (CN)
Yu Min Li, Xiamen (CN)
Assignee KAISTAR LIGHTING (XIAMEN) CO., LTD., Xiamen (CN) EPISTAR CORPORATION, Hsi...

Claim of US Patent No. 10,989,363

1. A LED filament, comprising: a carrier, LED chips disposed on the carrier, wherein the carrier comprises a first lateral section, and a second lateral section opposite to the first lateral section in a thicknesswise direction of the carrier, the LED chips are formed on the first lateral section and covered by the first lateral section and thereby lights emitted from the LED chips are guided outside of the carrier through the first lateral section and the second lateral section, and hardness of the first lateral section is less than that of the second lateral section;wherein the carrier comprises a substrate, a first adhesive and a second adhesive, the substrate comprises a first bracket and a second bracket connected with the first bracket, the first bracket has an upper surface away from the second bracket, the second bracket has a bottom surface away from the first bracket, the LED chips are disposed on the upper surface of the first bracket, the first adhesive covers the upper surface of the first bracket and the LED chips, the first adhesive and the first bracket form the first lateral section, the second adhesive covers the bottom surface of the second bracket, the second adhesive and the second bracket form the second lateral section;
wherein a thermal conductivity of the first bracket is higher than that of the second bracket, brittleness of the first bracket is more than that of the second bracket, and a thickness of the first bracket is less than that of the second bracket.