BACKLIGHT OF THE SCANNING ILLUMINATION TYPE FOR FLAT PANEL DISPLAYS

摘要

A scanning illumination (backlight) system for a display, comprising a window (2) for emitting light in the direction of the display (3), a reflector (8), arranged parallel and opposite the window, a plurality of elongated light sources (6, 6', 6",...) arranged between to the window and the reflector (8), wherein each light source (6, 6', 6",...) is provided with a single reflective layer (7, 7', 7") at the side facing the window (2) which reflects back part of the light from the source to the reflector (8). The reflective layer (7, 7', 7") forms an elongated concave reflecting surface relative to the light source (6, 6', 6",.) and may or may not be in direct contact with the source. A (partly) reflective light barrier (9,9', 9", is arranged between a pair of neighbouring sources. The light barrier (partition) has a substantially rectangular shape and is substantially free from the absorption of light generated by the sources. The partitions reduce blur in video images by limiting the cross- talk between two neighbouring lamps.