Abstract: A light valve device includes a light valve disposed adjacent to a circuit board, and a heat-dissipating structure including a heat-dissipating main body and a heat-dissipating block. The heat-dissipating main body is disposed opposite to the light valve, and is formed with a groove defined by a first contacting surface and two engaging surfaces. The first contacting surface extends in a longitudinal direction perpendicular to the vertical direction and has two opposite longitudinal edges. The engaging surfaces respectively extend from the longitudinal edges and define an open side of the groove opposite to the first contacting surface in the vertical direction. The open side has a width in the transverse direction smaller than that of the first contacting surface. An engaging portion of the heat-dissipating block is disposed in the groove so that a second contacting surface is in contact with the first contacting surface.

Abstract: A heat dissipation structure for an ellipsoidal lamp to provide an improved cooling effect for the ellipsoidal lamp has a redesigned shape and installing location for the blower duct that extends the outlet thereof to the edge of effective light beam zone of the ellipsoidal lamp so that the outlet is most close to the hot spots that require heat dissipation. Airflow ejected from the blower duct also is prevented from scattering to improve heat dissipation effect. The outlet may have a guiding plate located therein to channel the airflow close to the hot spots and match the shape of a reflection hood to improve airflow without scattering.

Abstract: A light source module comprises a case, a light source, a first air-circulation device, a second air-circulation device and an airflow guide. The case has an airflow outlet, and other components are disposed therein. The airflow guider includes a first stream-guiding part and a second stream-guiding part connected thereto. The first stream-guiding part and the airflow outlet are at a same side of the light source, the second stream-guiding part is over the light source. The first airflow provided by the first air-circulation device passes past the light source, arrives at the first stream-guiding part, flows from the front of the light source towards the back of the light source guided by the second stream-guiding part, and mixes up with the second airflow provided by the second air-circulation device and finally exits from the airflow outlet. Therefore, concentrated heat is prevented at the airflow outlet.

Abstract: A heat dissipation structure for an ellipsoidal lamp to provide an improved cooling effect for the ellipsoidal lamp has a redesigned shape and installing location for the blower duct that extends the outlet thereof to the edge of effective light beam zone of the ellipsoidal lamp so that the outlet is most close to the hot spots that require heat dissipation. Airflow ejected from the blower duct also is prevented from scattering to improve heat dissipation effect. The outlet may have a guiding plate located therein to channel the airflow close to the hot spots and match the shape of a reflection hood to improve airflow without scattering.