Patent ID: 10563853

Abstract:
An LED (light emitting diode) lamp comprises: a lamp shell including a lamp head, a lamp neck and a sleeve, the lamp head connects to the lamp neck which connects to the sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell; a power source having a first portion and a second portion, wherein the first portion of the power source is disposed in both the lamp neck and the lamp head of the lamp shell, and the second portion of the power source is disposed in the heat sink of the passive heat dissipating element; a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; a first heat dissipating channel formed in a chamber of the lamp shell for dissipating heat generated from the power source while the LED lamp is working; a second heat dissipating channel formed in the heat sink and between the fins and the base; and a lamp cover connected with the heat sink and having a light output surface and an end surface, wherein the end surface is formed with a vent to let air flowing from outside of the LED lamp into both the first heat dissipating channel and the second heat dissipating channel through the vent; wherein the first heat dissipating channel comprises a first end on the light emitting surface to allow air flowing from outside of the LED lamp into the chamber, and a second end on the upper portion of the lamp neck of the lamp shell to allow air flowing from inside of the chamber out to the LED lamp; wherein the second heat dissipating channel comprises a third end on the light emitting surface to allow air flowing from outside of the LED lamp into the second heat dissipating channel, and flowing out from spaces between every adjacent two of the fins; wherein the ratio of power of the LED lamp to heat dissipating area of the heat sink is 1:20˜30; wherein the light emitting surface further comprises an aperture configured to simultaneously communicate with both the first end of the first heat dissipating channel and the third end of the second heat dissipating channel, the aperture is located in a central region of the light emitting, and the aperture forms an air intake of both the first heat dissipating channel and the second heat dissipating channel.