A backlight unit for a display device includes a light guide plate formed with a first prism pattern on one of top and bottom surfaces, a lamp including first and second lamp portions facing first and second side surfaces, respectively, of the light guide plate, and a reflector facing the bottom surface of the light guide plate, wherein the first prism pattern is formed in a direction of crossing at least one of the first and second lamp portions.

 
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> Optical plate and method for manufacturing same and backlight module using same

> Optical sheet, and backlight unit and display using the same

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