Lighting device for back lighting of liquid crystal display, has optical unit with radiation emission surface which has convex curved partial region that partially surrounds concave curved partial region in distance to optical axis

摘要

The device has a semiconductor chip and an optical unit (2) comprising a radiation emission surface (4) for attaching at an optoelectronic component. The emission surface has a concave curved partial region (7) and a convex curved partial region which partially surrounds the concave curved partial region in a distance to the optical axis. The optical axis proceeds through the concave curved partial region.