Optical substrates having light collimating and diffusion structures

Patent metadata

Field	Value
Publication number	US-2016341883-A1
Application number	US-201615196059-A
Country	US
Kind code	A1
Filing date	Jun 29, 2016
Priority date	Mar 26, 2010
Publication date	Nov 24, 2016
Grant date	—

Abstract

This invention discloses a method of forming an uneven structure on a substrate. Use a hard tool to penetrate into a mold to cut a first trench and a second trench in an order on a surface of a mold, wherein the hard tool has a smoothly-curved shape such that the transverse width of each of the first trench and the second trench increases as the penetrating depth of the hard tool increases, wherein when each of the first trench and the second trench marches along a first direction, the penetrating depth of the hard tool is controlled by repeating moving the hard tool up and down to cut the mold such that the transverse width of each of the first trench and the second trench varies according to the controlled penetrating depth of the hard tool, wherein the first trench and the second trench completely overlap with each other with no space therebetween. Then, use the surface of the mold to emboss a thin film on a substrate.

First claim

What is claimed is:

1 . An optical sheet, comprising:
a substrate having a first surface and a second surface opposite to the first surface; and a film having a third surface and a fourth surface opposite to the third surface, wherein the third surface of the film is on the first surface of the substrate and the fourth surface of the film comprises a plurality of lenticular segments, wherein a lenticular segment has at least one convex or concave feature thereon.

2 . The optical sheet according to claim 1 , wherein a lenticular segment has at least one convex feature thereon.

3 . The optical sheet according to claim 2 , wherein the size of the lenticular segment is larger than the size of the convex feature.

4 . The optical sheet according to claim 1 , wherein a lenticular segment has at least one concave feature thereon.

5 . The optical sheet according to claim 4 , wherein the size of the lenticular segment is larger than the size of the concave feature.

6 . The optical sheet according to claim 1 , wherein each of the plurality of lenticular segments has at least one convex or concave feature thereon.

7 . The optical sheet according to claim 6 , wherein the size of the lenticular segment is larger than the size of the convex or concave feature.

8 . The optical sheet according to claim 7 , wherein the adjacent lenticular segments overlap so as to have no space therebetween.

9 . The optical sheet according to claim 1 , wherein the first surface of the substrate is a light input surface and the second surface the substrate is a light output surface.

10 . The optical sheet according to claim 6 , wherein each of the plurality of lenticular segments substantially has a smoothly-curved shape.

11 . The optical sheet according to claim 10 , wherein the projection on the first surface of the substrate of each of the plurality of lenticular segments is elliptical.

12 . An optical sheet, comprising:
a substrate having a first surface and a second surface opposite to the first surface, wherein the first surface of the substrate is a light input surface and the second surface of the substrate is a light output surface; a prismatic structure disposed on the second surface of the substrate, wherein the prismatic structure comprises a plurality of prisms extending substantially in a first direction; and a film having a third surface and a fourth surface opposite to the third surface, wherein the third surface of the film is on the first surface of the substrate and the fourth surface of the film comprises a plurality of lenticular segments, wherein each of the plurality of lenticular segments has a roughed or textured surface.

13 . The optical sheet according to claim 12 , wherein each of the plurality of lenticular segments substantially has a smoothly-curved shape.

14 . The optical sheet according to claim 13 , wherein the projection on the first surface of the substrate of each of the plurality of lenticular segments is elliptical.

15 . The optical sheet according to claim 12 , wherein the adjacent lenticular segments overlap so as to have no space therebetween.

16 . An optical sheet, comprising:
a substrate having a first surface and a second surface opposite to the first surface; and a film having a third surface and a fourth surface opposite to the third surface, wherein the third surface of the film is on the first surface of the substrate and the fourth surface of the film comprises a structure corresponding to a combination of a plurality of first convex shapes and a plurality of second convex or concave shapes superimposed on the plurality of first convex shapes.

17 . The optical sheet according to claim 16 , wherein the fourth surface of the film comprises a structure corresponding to a combination of a plurality of first convex shapes and a plurality of second convex shapes superimposed on the plurality of first convex shapes.

18 . The optical sheet according to claim 17 , wherein the size of the first convex shape is larger than the size of the second convex shape.

19 . The optical sheet according to claim 16 , wherein the fourth surface of the film comprises a structure corresponding to a combination of a plurality of first convex shapes and a plurality of second concave shapes superimposed on the plurality of first convex shapes.

20 . The optical sheet according to claim 19 , wherein the size of the first convex shape is larger than the size of the second concave shape.

Assignees

• Ubright Optronics Corp

Inventors

• Yang Ching-An
• Pan Han-Tsung

Classifications

• B29D11/00278

  Lenticular sheets (B29D11/00269 takes precedence) · CPC title

• B29L2011/0016

  Lenses · CPC title

• G02B27/30

  Collimators · CPC title

• G02B6/0051

  Diffusing sheet or layer · CPC title

• B29C33/424

  Moulding surfaces provided with means for marking or patterning (for injection moulding B29C45/372) · CPC title