Power supply apparatus, backlight assembly and liquid crystal display apparatus having the same

A backlight assembly comprising:

• a lamp driving part converting an externally provided direct current into an alternating current, and transforming voltage of the alternating current to output the alternating current;
• a light emitting part including a lamp having a first end portion to which high voltage alternating current is applied, and generating a light in response to the transformed alternating current;
• and
• a light controller increasing luminance of the light,
• wherein the lamp driving part includes:
• an inverter controller outputting the externally provided direct current in response to a predetermined control signal;
• a power transforming part converting the direct current into the alternating current, and transforming voltage of the alternating current to output a first polarity current and a second polarity current;
• and
• a connecting part outputting the first polarity current to a first end portion of a load through a first terminal, the connecting part outputting the second polarity current to a second end portion of the load through a second terminal, and the connecting part having a third terminal to receive a sensed signal in response to the first or second polarity currents so as to output the sensed signal,
• wherein the first terminal is spaced apart from the second terminal by a first insulating distance, and the third terminal is spaced apart from the first or second terminals adjacent to the third terminal by a second insulating distance.

An LCD apparatus comprising:

• a backlight assembly including
• a lamp driving part converting an externally provided direct current into an alternating current, and transforming voltage of the alternating current to output the alternating current,
• a light emitting part including a lamp having an end portion, to which high voltage alternating current is applied, and generating light in response to the transformed alternating current, and
• a light controller increasing luminance of the light;
• and
• a display unit disposed on the light controller to receive the light from the light emitting part through the light controller, thereby displaying an image,
• and wherein the lamp driving part includes
• an inverter controller outputting the externally provided direct current in response to a predetermined control signal;
• a power transforming part converting the direct current into the alternating current, and transforming a voltage of the alternating current to output a first polarity current and a second polarity current;
• and
• a connecting part outputting the first polarity current to a first end portion of the lamp through a first terminal, the connecting part outputting the second polarity current to a second end portion of the lamp through a second terminal, and the connecting part having a third terminal to receive a sensed signal in response to the first or second polarity currents so as to output the sensed signal,
• and wherein the first terminal is spaced apart from the second terminal by a first insulating distance, and the third terminal is spaced apart from the first or second terminals adjacent to the third terminal by a second insulating distance.