DIFFUSER PLATE HAVING REFLECTION PART AND BEAD PARTICLES

摘要

An optical sheet including a reflective unit and a diffusing plate with a bead are provided to improve brightness uniformity in the whole area of a backlight by controlling an amount of the light emitted from a lower optical source. A diffusing plate(100) includes a first optical sheet(110) and a second optical sheet(120) arranged with a predetermined interval. The first optical sheet is arranged to be adjacent to the optical source. The light emitted from the optical source is converted into a uniform surface optical source by passing through the first optical sheet and the second optical sheet. The first optical sheet includes a reflection part and a light transmission part selectively. The bead is added inside the second optical sheet to scatter the light. The reflection part is uniformly coated in the front of the second optical sheet.