| 摘要 |
PROBLEM TO BE SOLVED: To provide a light emission diode bulb.SOLUTION: A light emission diode bulb comprises: a lamp housing including a lamp shade, a cup-shaped housing part connected to the lamp shade, and a heat conduction part disposed in the cup-shaped housing part; a heat sink disposed in the lamp shade and including a heat radiation housing covering the outer side face of the heat conduction part, and a radiation frustum having four faces of a top face, a bottom face and side faces, of which the top face has a larger area than that of the bottom face, the side faces have an inverted trapezoidal shape, the bottom face has a perpendicular axis direction, and an included angle between the individual side faces and the axial direction is less than 90 degrees; light-emitting diode modules mounted on the top face and the side faces of the heat radiation frustum; a lamp cap fixed on the bottom ends of the cup-shaped housing part; and a drive circuit disposed in the heat conduction part and electrically connected with the light-emitting diode modules and the lamp cap. |
