A lens system for LED based light fixtures having a substantially coplanar array of LED's with a requirement for a wide angle of illumination. And in particular, light fixtures comprising LED lights used in low bay applications.

A lens system for LED based light fixtures having a substantially coplanar array of LED's with a requirement for a wide angle of illumination. And in particular, light fixtures comprising LED lights used in low bay applications.

The invention provides a light generating device (1000) comprising (i) a plurality of n light sources (100), and (ii) an optical component (1200) comprising an array (200) of prismatic elements (300), wherein: (a) the plurality of n light sources (100) comprise a first subset of one or more first light sources (110) configured to generate collimated first light source light (111) and a second subset of one or more second light sources (120) configured to generate collimated second light source light (121), wherein n>2; (b) the array (200) of prismatic elements (300) is configured in a light receiving relationship with the n light sources (100), wherein the array of prismatic elements (300) comprises k 1 parallel arranged first prismatic faces (201) and k2 parallel arranged second prismatic faces (202), wherein k1>2 and wherein k2>2, wherein the first prismatic faces (201) and the second prismatic faces (202) are not mutually parallel; (c) the first light sources (110) are configured to irradiate the first prismatic faces (201) and the second light sources (120) are configured to irradiate the second prismatic faces (202); and (d) the prismatic elements (300) are configured to reflect or refract the collimated first light source light (111) and the collimated second light source light (121) as coincident beams of first light source light (111) and second light source light (121).

A stage light with a defogging device includes a light head, in which a mounting plate for fixing a light source and a supporting plate for mounting optical lens are arranged. At a light outlet of the light head a light emitting lens is provided, a light source cavity is formed by the supporting plate, the mounting plate and a side wall of the light head. A blower is arranged in the light source cavity, which is configured to guide airflow into space between the supporting plate and the light emitting lens through an air guiding element. Hot airflow in the light source cavity is guided into the space between the supporting plate and the light emitting lens, so that the temperature of the space between the supporting plate and the light emitting lens is increased, thereby reducing a temperature difference in the light head to avoid water fog.

A stage light with a defogging device includes a light head, in which a mounting plate for fixing a light source and a supporting plate for mounting optical lens are arranged. At a light outlet of the light head a light emitting lens is provided, a light source cavity is formed by the supporting plate, the mounting plate and a side wall of the light head. A blower is arranged in the light source cavity, which is configured to guide airflow into space between the supporting plate and the light emitting lens through an air guiding element. Hot airflow in the light source cavity is guided into the space between the supporting plate and the light emitting lens, so that the temperature of the space between the supporting plate and the light emitting lens is increased, thereby reducing a temperature difference in the light head to avoid water fog.

A vehicular lamp includes a projection lens made of resin; a light source that is disposed behind the projection lens, the vehicular lamp being configured such that light from the light source is emitted forward through the projection lens; a wind generator configured to generate wind; and a wind guide path configured to guide wind generated by the wind generator to a position where the wind hits a surface of the projection lens.

A vehicular lamp includes a projection lens made of resin; a light source that is disposed behind the projection lens, the vehicular lamp being configured such that light from the light source is emitted forward through the projection lens; a wind generator configured to generate wind; and a wind guide path configured to guide wind generated by the wind generator to a position where the wind hits a surface of the projection lens.

The present invention relates to a lighting device (1, 2, 5, 6) comprising a hollow and translucent envelope (12, 22, 52) connected to a base (13, 23, 53); a light mixing element (10, 20, 30, 50, 60) arranged within the envelope (12, 22, 52); and at least one light emitting diode (11, 21, 31, 51) arranged within the envelope (12, 22, 52), arranged to emit light into the light mixing element (10, 20, 30, 50, 60) and arranged in thermal contact with the light mixing element (10, 20, 30, 50, 60). The light mixing element (10, 20, 30, 50, 60) comprises a thermally conductive and translucent ceramic material. The light emitted from the light emitting diode (11, 21, 31, 51) is mixed within the light mixing element (10, 20, 30, 50, 60), distributed from the light mixing element (10, 20, 30, 50, 60) through the thermally conductive and translucent ceramic material, and transmitted through the translucent envelope (12, 22, 52). The present invention also relates to a luminaire comprising such a lighting device (1, 2, 5, 6).

A system includes a heat sink module and a driving circuit module. The heat sink module includes stepped through-holes that each includes a cylindrical upper and lower portions connected by a ring-shaped surface. The bottom surface of the heat sink module includes grooves that respectively pass through the lower portions of respective sequences of the stepped through-holes. The driving circuit module includes conductive connectors and electrical driving surfaces that are disposed external to the heat sink module. Each conductive connector lies within a respective groove in the bottom surface of the heat sink module. The conductive connectors include internal connectors that each link at least two stepped through-holes in a respective sequence of stepped through-holes passed by a respective groove, and include external connectors that each link at least one stepped through-hole in the respective sequence of stepped through-holes to the electrical driving surfaces.

A system includes a heat sink module and a driving circuit module. The heat sink module includes stepped through-holes that each includes a cylindrical upper and lower portions connected by a ring-shaped surface. The bottom surface of the heat sink module includes grooves that respectively pass through the lower portions of respective sequences of the stepped through-holes. The driving circuit module includes conductive connectors and electrical driving surfaces that are disposed external to the heat sink module. Each conductive connector lies within a respective groove in the bottom surface of the heat sink module. The conductive connectors include internal connectors that each link at least two stepped through-holes in a respective sequence of stepped through-holes passed by a respective groove, and include external connectors that each link at least one stepped through-hole in the respective sequence of stepped through-holes to the electrical driving surfaces.