An optical semiconductor lighting apparatus including a housing with a first end portion and a second end portion that is open, a light source module disposed in the housing, a fan disposed adjacent to the light source module in the housing, the fan rotating in a first direction to blow...

A backlight module comprises a light source circuit board having a plurality of light emitters disposed thereon; a securing component for supporting the light source circuit board rigidly, the securing component comprising a holding portion and an adhesive layer, the adhesive layer being utilized for assembling the light source circuit...

A luminaire for providing broad uniform surface illumination and sharp cutoff which has at least one quasi point light source, such as an LED, located on an optical axis. There is at least one collimating ring lens which, at least partially surrounds the quasi point light source. The collimating ring...

A luminaire (20) comprising a light guide (11) having a first refractive index (n1), the light guide (11) comprising a light-entry surface (14), a light-reflecting surface (15) for reflecting light entering at the light-entry surface (14), and a light-exit surface (16) opposite the light-reflecting surface (15), for allowing light to...