Liquid crystal display

A liquid crystal display comprising:

• a liquid crystal display panel for modulating light to form an image;
• and a back light unit having at least one lamp tube without inside electrodes and which is discharged by outside electrodes disposed along an outer surface of said at least one lamp tube, said back light unit being disposed behind said liquid crystal display panel;
• wherein said outside electrodes include:
• first and second power supply electrodes:
• and
• first and second ground electrodes disposed between said first and second ground electrodes.

A liquid crystal display comprising:

• a liquid crystal display panel for modulating light to form an image;
• and
• a back light unit having a plurality of lamp tubes without inside electrodes and which are discharged by outside electrodes disposed along an outer surface of said at least one lamp tube, said back light unit being disposed behind said liquid crystal display panel;
• wherein said outside electrodes include at least two kinds of electrodes having different voltages applied thereto;
• a plurality of groups of electrodes are constructed so that electrodes in each group are arranged in a substantially line configuration with respect to at direction transverse to an extending direction of a respective one of said lamp tubes and electrically interconnected with an electrode of an adjacent lamp tube;
• each group of electrodes is arranged at a different position of said plurality of lamp tubes with respect to the extending direction of a respective one of said lamp tubes so that a same kind of said at least two kinds of electrodes is only arranged in the same line with respect to the transverse direction.