Patent ID: 11867939
Assignee: UBRIGHT OPTRONICS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F

Claim 13:
14. A composite optical film being used with a light guide plate, said composite optical film comprising:
a first substrate;
a plurality of reversed prisms, disposed on a bottom surface of the first substrate, said light guide plate being located under the plurality of reversed prisms, wherein the plurality of reversed prisms comprises a plurality of first-type reversed prisms and a plurality of second-type reversed prisms, wherein a first peak point of a first-type reversed prism is located lower than a second peak point of a reversed second-type prism; 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.