CPC G02B 6/0036 (2013.01) [G02B 6/0051 (2013.01)] | 18 Claims |
1. A composite optical film, said composite optical film comprising:
a first substrate;
a plurality of reversed prisms, disposed on a bottom surface of the first substrate; and
a first diffusion film, disposed over a top surface of the first substrate;
a plurality of first prisms, disposed over the first diffusion film, wherein the plurality of first prisms are disposed on a top surface of a second substrate, and the second substrate is disposed on a top surface of the first diffusion film; and
a plurality of second prisms, disposed over the plurality of first prisms, wherein the plurality of second prisms are disposed on a top surface of a third substrate, and the third substrate is disposed on a top surface of the plurality of first prisms,
wherein the plurality of first prisms include a plurality of first elevating portions and a plurality of first non-elevating portions, and
wherein the plurality of second prisms include a plurality of second elevating portions and a plurality of second non-elevating portions.
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