Patent ID: 7891830

Claim:
A liquid crystal display, comprising: a back light unit having a lamp housing having a first side and a second side opposite the first side, a plurality of lamps respectively having a low voltage electrode and a high voltage electrode each at opposite ends of the lamp and arranged substantially parallel in the lamp housing; and a liquid crystal panel disposed on the back light unit and having a plurality of liquid crystal cells arranged in a matrix form, wherein the plurality of low voltage electrodes of odd-numbered lamps are disposed at the first side and the plurality of high voltage electrodes of odd-numbered lamps are disposed at the second side, wherein the plurality of high voltage electrodes of even-numbered lamps are disposed at the first side and the plurality of low voltage electrodes of even-numbered lamps are disposed at the second side, wherein an inner wall of each lamp is coated with a BAM type phosphor, and a thickness of the BAM type phosphor at the low voltage electrodes is different from that at the high voltage electrodes, wherein an AC voltage from an inverter is applied to the low and high voltage electrodes such that a high voltage noise at the high voltage electrodes is offset by the adjacent low voltage electrodes, and wherein a difference of color sense (Δuv=((u 1 −u 2 ) 2 +(v 1 −v 2 ) 2 ) 1/2 ) of the back light unit is below 0.004 in which u=4x/(3+12y−2x), v=(⅔)×(9y)/(3+12y−2x), x and y are color coordinates defined in CIE, u 1 is the maximum value of u, v 1 is the maximum value of v, u 2 is the minimum value of u, and v 2 is the minimum value of v.