초록 ▼

A backlight unit is disclosed which improves picture quality by preventing a bright line or a dark line from being visible in the center of the display area. The backlight unit includes a plurality of U-shaped lamps arranged in two columns, wherein curved portions of the two opposite U-shaped lamps

A backlight unit is disclosed which improves picture quality by preventing a bright line or a dark line from being visible in the center of the display area. The backlight unit includes a plurality of U-shaped lamps arranged in two columns, wherein curved portions of the two opposite U-shaped lamps are symmetrically positioned in the center of a display area. Each of the curved portions of the U-shaped lamps has a non-luminous part so that light is not emitted by the curved portions of the U-shaped lamps. Optical sheets are provided above the U-shaped lamps, and a reflective sheet is provided below the U-shaped lamps.

대표청구항 ▼

What is claimed is: 1. A direct type backlight unit comprising:a plurality of U-shaped lamps arranged in two columns, wherein curved portions of two opposite U-shaped lamps are symmetrically positioned in the center of a display area, and the curved portion of any one of the two U-shaped lamps has a

What is claimed is: 1. A direct type backlight unit comprising:a plurality of U-shaped lamps arranged in two columns, wherein curved portions of two opposite U-shaped lamps are symmetrically positioned in the center of a display area, and the curved portion of any one of the two U-shaped lamps has a non-luminous portion, so as to provide a uniform luminance across the plurality of U-shaped lamps,wherein a fluorescent substance is not coated on the non-luminous portion in the curved portion of the U-shaped lamp,wherein a spacing interval between the curved portions of the opposite U-shaped lamps is smaller than a width of the non-luminous portion,wherein a diameter of each of the U-shaped lamps is to 4 mm,wherein optical sheets are provided above the U-shaped lamps,wherein the optical sheets are formed of a light-diffusion sheet, a prism sheet and a protection sheet,wherein a reflective sheet is provided below the U-shaped lamps, andwherein a case is provided for receiving and fixing the U-shaped lamps, the optical sheets, and the reflective sheet;wherein a width of the non-luminous portion is 5 mm; andwherein the curved portions of the opposite U-shaped lamps are symmetrically maintained at a spacing interval of 1 mm.