Led lamp with light emitting surface having first region, second region and third region

An LED (light emitting diode) lamp comprising:

• 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, wherein the heat sink comprises fins and a base, the sleeve of the lamp shell is located in the heat sink, the lamp neck projects from the heat sink, height of the lamp neck is at least 80% of height of the heat sink;
• 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 includes LED chip sets having LED chips, the LED chips electrically connected to the power source, wherein the light emitting surface and the heat sink are connected to form a heat transferring path from the LED chips to the passive heat dissipating element;
• 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, and the chamber is located between bottom of the LED lamp and an upper portion of the lamp neck;
• and
• a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink for dissipating the heat generated from the LED chips and transferred to the heat sink;
• 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 an aperture is located in a central region of the light emitting surface, and the aperture forms an air intake of both the first heat dissipating channel and the second heat dissipating channel;
• wherein the light emitting surface includes a first region, a second region located inside the first region in a radial direction of the LED lamp and a third region located outside the first region in the radial direction of the LED lamp, at least one LED chip set is located in the third region which inclines to the first region to form an angle, at least one LED chip set is located in the second region which inclines to the first region to form an angle.