Inverter circuit, backlight assembly, and liquid crystal display with backlight assembly

A backlight assembly comprising:

• a plurality of discharge tubes;
• a plurality of inverter transformers that supply AC voltage to the plurality of discharge tubes, the inverter transformers being arranged such that the AC voltage at a first terminal of each secondary coil has an opposite polarity with respect to the AC voltage at a second terminal of each secondary coil;
• and
• a plurality of balance transformers having primary coils inserted in series between corresponding reference terminals of the secondary coils of the inverter transformers and ground,
• wherein the secondary coils of the balance transformers are connected in series to form a loop, one node of the loop being grounded;
• a voltage detection node being located on the loop;
• and
• at least one secondary coil of the secondary coils of the balance transformers is interposed between the grounded node of the loop and the voltage detection node.

A liquid crystal display comprising:

• a liquid crystal panel to display an image on the liquid crystal display, the liquid crystal panel comprising:
• a plurality of gate lines;
• a plurality of data lines approximately orthogonal to the gate lines;
• a plurality of switching elements connected to the gate lines and the data lines;
• and
• a liquid crystal element connected to the switching elements,
• an inverter circuit comprising:
• a plurality of inverter transformers that supplies AC voltage to a plurality of discharge tubes, the inverter transformers each having a secondary coil, the inverter transformers being arranged such that a first terminal of each secondary coil has an AC voltage of opposite polarity with respect to a second secondary terminal of each secondary coil;
• and
• a plurality of balance transformers having primary coils inserted in series between a reference terminal of each secondary coil of the inverter transformers and ground,
• wherein the secondary coils of the balance transformers are connected in series to form a loop, one node of the loop being grounded;
• a voltage detection node being located on the loop;
• and
• at least one secondary coil of the secondary coils of the balance transformers being interposed between the grounded node of the loop and the voltage detection node.

A liquid crystal display comprising:

• a display unit having a liquid crystal panel, a data circuit and a gate circuit connected to the liquid crystal panel;
• a backlight assembly having a plurality of discharge tubes;
• a case for receiving the backlight assembly;
• a top chassis protecting the liquid crystal panel from externally applied mechanical impacts;
• at least one optical sheet disposed between the liquid crystal panel and the backlight assembly;
• and
• an inverter circuit comprising:
• a plurality of inverter transformers that supplies AC voltage to a plurality of discharge tubes, the inverter transformers being arranged such that the AC voltage at a respective first terminal of each secondary coil has a substantially opposite polarity with respect to the AC voltage at a corresponding second terminal of each secondary coil;
• and
• a plurality of balance transformers having primary coils inserted in series between a reference terminal of the secondary coils of the inverter transformers and ground,
• wherein the secondary coils of the balance transformers are connected in series to form a loop, one node of the loop being grounded;
• a voltage detection node being located on the loop;
• and
• at least one secondary coil of the secondary coils of the balance transformers being interposed between the grounded node of the loop and the voltage detection node.

A liquid crystal display comprising:

• a liquid crystal panel to display an image, the liquid crystal panel comprising:
• a plurality of gate lines;
• a plurality of data lines approximately orthogonal to the gate lines;
• a plurality of switching elements connected to the gate lines and the data lines;
• a liquid crystal element connected to the switching elements;
• and
• a backlight assembly comprising:
• a plurality of discharge tubes;
• a plurality of inverter transformers that supply AC voltage to the plurality of discharge tubes, the inverter transformers being arranged such that the AC voltage at a respective first terminal of each secondary coil has a substantially opposite polarity with respect to the AC voltage at a corresponding second terminal of each secondary coil;
• and
• a plurality of balance transformers having primary coils inserted in series between a reference terminal of the secondary coils of the inverter transformers and ground,
• wherein the secondary coils of the balance transformers are connected in series to form a loop, one node of the loop being grounded;
• a voltage detection node being located on the loop;
• and
• at least one secondary coil of the secondary coils of the balance transformers being interposed between the grounded node of the loop and the voltage detection node.

A liquid crystal display comprising:

• a display unit having a liquid crystal panel, a data circuit and a gate circuit connected to the liquid crystal panel;
• a backlight assembly having a plurality of discharge tubes;
• a case for receiving the backlight assembly;
• a top chassis for protecting the liquid crystal panel from externally applied mechanical impacts;
• and
• at least one optical sheet disposed between the liquid crystal panel and the backlight assembly,
• the backlight assembly comprising:
• a plurality of inverter transformers that supply AC voltage to the plurality of discharge tubes, the inverter transformers being arranged such that the AC voltage at a respective first terminal of each secondary coil has an opposite polarity with respect to the AC voltage at a corresponding second terminal of each secondary coil;
• and
• a plurality of balance transformers having primary coils inserted in series between a reference terminal of the secondary coils of the inverter transformers and ground,
• wherein the secondary coils of the balance transformers are connected in series to form a loop, one node of the loop being grounded;
• a voltage detection node being located on the loop;
• and
• at least one secondary coil of the secondary coils of the balance transformers being interposed between the grounded node of the loop and the voltage detection node.