A lightguide having either a built-in prism sheet or a built-in diffuser
sheet is disclosed. The lightguide includes: a prism sheet having a plane
surface and a surface with a plurality of patterned microlens; a
transparent wedge having a cross-section of trapezoid; and a binder layer
sandwiched between said plane surface of said prism sheet and said
transparent wedge. A method for manufacturing the lightguide is also
disclosed here.
