Lighting system and liquid crystal display using the same

A lighting system having light-emitting diodes as light sources mounted on a circuit board, wherein

• the light-emitting diodes include a first light-emitting diode, a second light-emitting diode and a third light-emitting diode, the first, second and third light-emitting diodes being different color light-emitting diodes,
• the light-emitting diodes are constituted of one single unit including one for each of the first, second and third light-emitting diodes, and the one single unit is repeatedly arranged as plural single units mounted side by side on the same circuit board, and
• each of the first, second and third light-emitting diodes of one single unit is individually connected electrically to the first, second and third light-emitting diodes of the same color of another single unit to emit a light,
• wherein a first wiring pattern enables connection of one of the first, second and third light-emitting diodes of the plural single units and has at least one portion formed linearly on the same circuit board along a mounting direction of the light-emitting diodes of the plural single units so as to extend only along a first side of the circuit board, and
• wherein a second wiring pattern enables connection of another of the first, second and third light-emitting diodes of the plural single units and has at least one portion formed linearly on the same circuit board along the mounting direction of the light-emitting diodes of the plural single units so as to extend only along a second side of the circuit board, the second side of the circuit board being opposite to the first side of the circuit board.