Patent ID: 8054010

Claim:
An illuminating device for a display device, comprising: a plurality of illuminating sections each including: a tube lamp arranged to be driven in parallel; a first power feeding member; and a second power feeding member; wherein the tube lamp is arranged to be fed with electric power from a power supply device via the first and second power feeding members; and the illuminating sections each comprising an equivalent circuit, the equivalent circuit including a serial circuit including a negative resistance with a capacitor connected to at least one end thereof; wherein the plurality of illuminating sections are arranged side by side in a direction that is substantially perpendicular to a main axis of the tube lamps; the plurality of illuminating sections arranged side by side in the direction that is substantially perpendicular to the main axis of the tube lamps are grouped into two, a first and a second, channels so as to be driven in parallel in each channel separately; a first voltage applied to end portions, located in a first direction along the main axis, of the illuminating sections belonging to the first channel and a second voltage applied to end portions, located in the first direction along the main axis, of the illuminating sections belonging to the second channel are opposite in phase; and a third voltage applied to end portions, located in a second direction, opposite to the first direction, along the main axis, of the illuminating sections belonging to the first channel and a fourth voltage applied to end portions, located in the second direction along the main axis, of the illuminating sections belonging to the second channel are opposite in phase.