Patent ID: 9638390
Date: 2017-05-02
CPC Classifications: F21K,F21V,F21Y

Claim:
1. An axially symmetric LED light bulb, comprising a lamp shade, a substrate and a connecting seat, and the substrate being installed on the connecting seat and having a plurality of LED light sources, and an edge of the lamp shade being coupled to the connecting seat and the substrate being covered inside the lamp shade, characterized in that the lamp shade has an unequal thickness, and the thickness of the top of the lamp shade is greater than the thickness of the lateral side of the lamp shade, such that the LED light sources are arranged at a polar coordinate origin position, and when the illumination of LED light source points at a direction towards the polar coordinate 0 degree and after the light of the LED light source passes through the lamp shade, at least 5% of the total flux of the LED light source is obtained at the polar coordinate positions from 135 degrees to 180 degrees; and the light of the LED light source passes through the lamp shade satisfies (|I−Iavg|/Iavg)<25%, wherein, I is an intensity of light of at least 90% of a spatial position between the polar coordinate positions from 0 degree to 135 degrees, and Iavg is an average light intensity between the polar coordinate positions from 0 degree to 135 degrees.