Backlight unit and liquid crystal display device having the same

A liquid crystal display (LCD) device, comprising:

• a liquid crystal display panel for displaying an image;
• a backlight unit for supplying light to the LCD panel, and the backlight unit including an optical source, a diffusion sheet for diffusing the light from the optical source, a first prism sheet for collecting the light to a front side to enhance brightness of the light diffused by the diffusion sheet, a second prism sheet for refracting the light collected by the first prism sheet to re-collect the light to a front side, and a micro lens film for refracting the light from the second prism sheet;
• a polarizer disposed between the LCD panel and the backlight unit, the polarizer including a zero retardation triacetyl cellulose (TAC) film having no phase difference (Rth);
• and
• an analyzer facing the polarizer in which the LCD panel is sandwiched therebetween, the analyzer including a zero retardation TAC film having no phase difference (Rth).

A backlight unit, comprising:

• an optical source;
• a first diffusion sheet for diffusing light incident from the optical source;
• a second diffusion sheet for diffusing the light diffused by the first diffusion sheet to uniform the brightness of the light;
• and
• a dual brightness enhanced film for enhancing brightness of the light diffused by the first and second diffusion sheets.

A liquid crystal display (LCD) device, comprising:

• a liquid crystal display panel for displaying an image;
• a backlight unit for supplying light to the LCD panel, the backlight unit including an optical source, a first diffusion sheet for diffusing light incident from the optical source, a second diffusion sheet for diffusing the light diffused by the first diffusion sheet to uniform the brightness of the light, and a dual brightness enhanced film for enhancing brightness of the light diffused by the first and second diffusion sheets;
• a polarizer including a zero retardation triacetyl cellulose (TAC) film having no phase difference (Rth) and a phase difference film;
• and
• an analyzer facing the polarizer in which the LCD panel is sandwiched therebetween, the analyzer including a zero retardation TAC film having no phase difference (Rth).