Koninklijke Philips Corporation N.v.

Signify Holding B.v.

Philips Lighting Holding B.v.

Guangliang Guo

Simon Eme Kadijk

Theodoor Cornelis Treurniet

Yan Xiong

Robert Zou

Howard Jiang

A lighting device or a lamp bulb () with a smooth appearance comprises at least one light source (); a heat sink component (), having a bottom () and a side wall () extending from the bottom (), wherein the bottom () comprises a protrusion () and wherein the at least one light source () thermally contacts the protrusion () of the heat sink component (); and a cover provided on the sidewall () opposite to the bottom (), thereby defining an air chamber () between the cover, the side wall (), the bottom () and the protrusion ().

Lighting device with smooth outer appearance

A lighting device or a lamp bulb () with a smooth appearance comprises at least one light source (); a heat sink component (), having a bottom () and a side wall () extending from the bottom (), wherein the bottom () comprises a protrusion () and wherein the at least one light source () thermally contacts the protrusion () of the heat sink component (); and a cover provided on the sidewall () opposite to the bottom(), thereby defining an air chamber () between the cover, the side wall (), the bottom () and the protrusion ().

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Shanghai, China

Guangliang Guo