Koninklijke Philips Corporation N.V.

Lumileds LLC

Lumileds Holding B.v.

Hui Ling Pan

Paul Scott Martin

Chunheng Kang

Jin Cherl Kwon

Sze Kuang Lee

Albrecht Johannes Kraus

Xiaobo Zhang

Chao Ding

Long Yin

Shichun Liu

Hiu Tung Chu

Shengjin Chen

Hua Sin Yew

Yuanyuan Wang

Fangzhong Shen

Jianzhong Pan

Lan Li

Xin Sheng

Chun Heng Kang

Yang Guang Zhao

Xinping Yan

Shanhai Guo

Hua Sin Daniel Yew

Sheng Jin Chen

Xiao Bo Zhang

Shi Chun Liu

A light-emitting device (A) includes: a lead frame () including a die paddle () and a lead () spaced apart from each other; a light-emitting die () attached on the die paddle (); a wire () bonding the light-emitting die () to the lead (), wherein a first end () of the wire () and a region of the light-emitting die () to which the first end () of the wire () is bonded form a first necking area (); a first resin cover () covering the first necking area (); and a second resin cover () covering the first resin cover (), the light-emitting die (), and the wire (). The first resin cover () has a hardness lower than a hardness of the second resin cover ().

Light-emitting device and method of packaging the same

LED bulb

An LED lamp includes a metal lead frame strip () on which is directly mounted bare LED dies (), such as in series. Therefore, there is excellent thermal conductivity to the lead frame (). Lenses () are then molded over the LED dies () to encapsulate them. The lead frame () is then inserted into a mold for a thermally conductive plastic body () and is bent in an arc while in the mold so that the top surfaces of the LED dies () are not parallel to each other. The plastic body is molded, and the structure is removed from the mold. The curved lead frame causes the overall light emission to be very wide, such a greater than 270 degrees. In another embodiment, the lead frame strip is supported over a curved outer surface of a pre-molded plastic support. Ends of the lead frame strip are inserted into electrical connectors of the plastic support.

LEDs mounted on curved lead frame

In one embodiment, an LED bulb includes a plurality of metal lead frame strips, including at least a first strip, a second strip, and a third strip. First LED dies have their bottom electrodes electrically and thermally connected to a top surface of the first strip. Second LED dies have their bottom electrodes electrically and thermally connected to a top surface of the second strip. The top electrodes of the first LED dies are wire bonded to the second strip, and the top electrodes of the second LED dies are wire bonded to the third strip to connect the first LED dies and second LED dies in series and parallel. The strips are then bent to cause the LED dies to face different directions to obtain a wide emission pattern in a small space. The strips are then enclosed in a thermally conductive bulb having electrical leads.

Growing community of inventors

Shanghai, China

Hui Ling Pan