Patent ID: 7522233

Claim:
A display device comprising: a backlight unit for emitting light forward; a plurality of picture elements, which are arranged in columns and rows to define a picture element plane and each of which has a transmitting region to transmit the light that has come from the backlight unit; and a plurality of collecting elements, which are arranged in front of the backlight unit to transmit and collect the light on the picture element plane, each of the collecting elements being associated with the transmitting region of one of the picture elements, wherein the light that has been transmitted through each said collecting element forms a beam spot on the picture element plane, the center of the beam spot being located within the transmitting region associated with the collecting element, wherein two beam spots, which are the most closely adjacent beam spots formed on two of the picture elements that are adjacent to each other in a row direction, have their centers of mass shifted from each other in a column direction on the picture element plane, and wherein the collecting elements and/or the transmitting regions are arranged in a zig-zag pattern with a predetermined pitch across a substantial part of the display device in a certain direction, so that said predetermined pitch and said zig-zag pattern are both provided across the substantial part of the display device.