Optical substrates having light collimating and diffusion structures

Patent metadata

Field	Value
Publication number	US-9851479-B2
Application number	US-201414166842-A
Country	US
Kind code	B2
Filing date	Jan 28, 2014
Priority date	Mar 26, 2010
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

An optical substrate having a structured prismatic surface and an opposing structured lenticular surface. The structured lenticular surface includes shallow-curved lens structures. Adjacent shallow-curved lens structure may be continuous or contiguous, or separated by a constant or variable spacing. The lens structure may have a longitudinal structure with a uniform or varying cross section. The lenticular lenses may have a laterally meandering structure. Sections of adjacent straight or meandering lenticular lenses may intersect or partially or completely overlap each other. The lenticular lenses may be in the form of discontinuous lenticular segments. The lenticular segments may have regular, symmetrical shapes, or irregular, asymmetrical shapes, which may be intersecting or overlapping, and may be textured. The lens structure may be provided with isolated ripples, in the form of a single knot, or a series of knots.

First claim

What is claimed is:

1. An optical film, comprising:
a substrate having a light input surface and a light output surface opposite to the light input surface;
a prismatic structure disposed on the light output surface of the substrate, wherein the prismatic structure comprises a plurality of prisms extending in a first direction; and
a lenticular structure disposed on the light input surface of the substrate, wherein the lenticular structure comprises a plurality of lenticular segments each of which is non-cylindrical and doesn't extend from a first edge of the light input surface to a second edge of the light input surface opposite to the first edge of the light input surface, wherein each of the plurality of lenticular segments has a largest dimension in a second direction, wherein the first direction and the second direction are substantially parallel.

2. The optical film according to claim 1 , wherein each of the plurality of lenticular segments has a smooth-curved exposed surface.

3. The optical film according to claim 1 , wherein the surface of the plurality of lenticular segments has roughed or textured structure for diffusion.

4. The optical film according to claim 1 , wherein a portion of the lenticular segments are disposed along a straight line such that each of the portion of the lenticular segments has a largest dimension in the direction of the straight line.

5. The optical film according to claim 1 , wherein a first portion of the lenticular segments are disposed along a first straight line such that each of the first portion of the lenticular segments has a largest dimension in the direction of the first straight line, and a second portion of the lenticular segments are disposed along a second straight line parallel to the first straight line such that each of the second portion of the lenticular segments has a largest dimension in the direction of the second straight line, wherein the first portion of the lenticular segments and the second portion of the lenticular segments overlay between the first straight line and the second straight line.

6. The optical film according to claim 5 , wherein the surface of the plurality of lenticular segments has roughed or textured structure for diffusion.

7. The optical film according to claim 1 , wherein each of the plurality of lenticular segments is ellipsoid-like.

8. The optical film according to claim 1 , wherein, wherein at least two lenticular segments overlap each other.

9. An optical film, comprising:
a substrate having a light input surface and a light output surface opposite to the light input surface;
a prismatic structure disposed on the light output surface of the substrate, wherein the prismatic structure comprises a plurality of prisms extending in a first direction; and
a lenticular structure disposed on the light input surface of the substrate, wherein the lenticular structure comprises a plurality of lenticular segments each of which is non-cylindrical, wherein the overall light input surface of the substrate has no lenticular segment extending from a first edge of the light input surface to a second edge of the light input surface opposite to the first edge of the light input surface thereon, wherein each of the plurality of lenticular segments has a largest dimension in a second direction, wherein the first direction and the second direction are substantially parallel.

10. The optical film according to claim 9 , wherein each of the plurality of lenticular segments has a smooth-curved exposed surface.

11. The optical film according to claim 9 , wherein the surface of the plurality of lenticular segments has roughed or textured structure for diffusion.

12. The optical film according to claim 9 , wherein a portion of the lenticular segments are disposed along a straight line such that each of the portion of the lenticular segments has a largest dimension in the direction of the straight line.

13. The optical film according to claim 9 , wherein a first portion of the lenticular segments are disposed along a first straight line such that each of the first portion of the lenticular segments has a largest dimension in the direction of the first straight line, and a second portion of the lenticular segments are disposed along a second straight line parallel to the first straight line such that each of the second portion of the lenticular segments has a largest dimension in the direction of the second straight line, wherein the first portion of the lenticular segments and the second portion of the lenticular segments overlay between the first straight line and the second straight line.

14. The optical film according to claim 13 , wherein the surface of the plurality of lenticular segments has roughed or textured structure for diffusion.

15. The optical film according to claim 9 , wherein each of the plurality of lenticular segments is ellipsoid-like.

16. The optical film according to claim 9 , wherein, wherein at least two lenticular segments overlap each other.

17. An optical film, comprising:
a substrate having a light input surface and a light output surface opposite to the light input surface;
a prismatic structure disposed on the light output surface of the substrate, wherein the prismatic structure comprises a plurality of prisms extending in a first direction; and
a lenticular structure disposed on the light input surface of the substrate, wherein the lenticular structure comprises a plurality of lenticular segments, wherein at least two lenticular segments overlap each other, wherein the overall light input surface of the substrate has no lenticular segment extending from a first edge of the light input surface to a second edge of the light input surface opposite to the first edge of the light input surface thereon, wherein each of the plurality of lenticular segments has a largest dimension in a second direction, wherein the first direction and the second direction are substantially parallel.

18. The optical film according to claim 17 , wherein each of the plurality of lenticular segments has a smooth-curved exposed surface.

19. The optical film according to claim 17 , wherein the surface of the plurality of lenticular segments has roughed or textured structure for diffusion.

20. The optical film according to claim 17 , wherein each of the plurality of lenticular segments is ellipsoid-like.

Assignees

• Ubright Optronics Corp

Inventors

• Yang Ching-An
• Chiu Wei-Tai
• Pan Han-Tsung
• Hsin Lung-Pin
• Juan Yu-Mei

Classifications

• G02F2001/133607

  Physics · mapped topic

• G02B3/0068

  arranged in a single integral body or plate, e.g. laminates or hybrid structures with other optical elements (G02B5/1885, G02B17/002, G02B30/27 take precedence) · CPC title

• G02B3/005

  arranged along a single direction only, e.g. lenticular sheets (G02B3/0043 takes precedence) · CPC title

• G02B3/0056

  arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses (G02B3/0043 takes precedence; miniaturised objectives for electronic devices employing wafer level optics G02B13/0085) · CPC title

• G02B5/021 Primary

  the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures · CPC title