Patent ID: 9134012
Filing Date: 2015-09-15
Classification: F21K,F21V

Abstract:
1. A lighting device for producing omnidirectional light, comprising: a plurality of lighting modules each comprising a heat sink, the heat sink having a light-producing side and a heat-dissipating side opposite to the light-producing side, the light-producing side comprising one or more light-emitting elements mounted to the heat sink for producing light, the heat-dissipating side being configured to dissipate heat produced by the one or more light-emitting elements, the lighting modules being circumferentially arranged with the light-producing side of the heat sink of any of the lighting modules facing outward such that generation of the omnidirectional light is allowable; and a supporting unit attached to the heat-dissipating side of the heat sink of each of the lighting modules via a joining member, for providing mechanical support to the lighting modules, wherein each joining member is movable for setting a pointing direction of the lighting module attached thereto such that light collectively produced by the one or more light-emitting elements of any of the lighting modules has a lighting direction that is reconfigurable; the supporting unit and the lighting modules being arranged and configured such that a space formed by minimally enclosing an entirety of the lighting modules includes a first polar opening, a second polar opening opposite to the first polar opening, and a ventilation channel between the first polar opening and the second polar opening for enabling air flowing through the ventilation channel to carry away at least a portion of heat obtained from the heat-dissipating sides of the heat sinks of the lighting modules to outside said space, wherein: a line-of-sight path between the first polar opening and the second polar opening is identifiable, allowing a direct flow of air that advances through the ventilation channel from the first polar opening to the second polar opening, or vice versa, to be realizable to thereby promote the carrying away of the at least a portion of heat to outside said space; regardless of the pointing direction of the joining member of the lighting module set by the joining member, the ventilation channel immediately adjacent the first polar opening is not occupied by the supporting unit, widening a portion of the ventilation channel such that a hollow in the ventilation channel immediately adjacent the first polar opening is created to further promote the carrying away of the at least a portion of heat; and said space further includes a plurality of lateral openings each of which is located between adjacent two of the lighting modules, and is connected to the ventilation channel as well as to both the first and the second polar openings, causing the first polar opening, the second polar opening and an entirety of the lateral openings to form a single opening encircling said space, and allowing the air to freely flow, through the single opening and the hollow, in and out of the ventilation channel in multiple directions to enable unobstructed movement of air so as to achieve efficient heat dissipation.