Diffusers and methods of manufacturing

• US 20070041211A1
• Filed: 05/12/2006
• Published: 02/22/2007
• Est. Priority Date: 05/16/2005
• Status: Abandoned Application

• Current Assignee: Gene Koch, John Magno, Zhijian Lu
• Original Assignee: Gene Koch, John Magno, Zhijian Lu
• Inventors: Lu, Zhijian, Koch, Gene, Magno, John
• Application Number:
  US11/432,713
• Publication Number:
  US 20070041211A1
• Time in Patent Office: Days
• US Class Current: 362/558
• CPC Class Codes: B29D 11/00663 Production of light guides
• CPC Class Codes: B29D 11/0073 Optical laminates
• CPC Class Codes: G02B 5/0215 the surface having a regular structure
• CPC Class Codes: G02B 5/0242 by means of dispersed particles
• CPC Class Codes: G02B 5/0263 with positional variation of the diffusing properties, e.g. gradient or patterned diffuser
• CPC Class Codes: G02B 5/0268 characterized by the fabrication or manufacturing method
• CPC Class Codes: G02B 5/0278 used in transmission
• CPC Class Codes: G02B 6/0051 Diffusing sheet or layer
• CPC Class Codes: G02B 6/138 by using polymerisation

Abstract

A structure including an integrally formed diffuser may be formed by depositing a first layer including a first polymerizable material and another material, and depositing a second layer including a second polymerizable material adjacent the first layer. The first and second layers are simultaneously irradiated with light that causes the first polymerizable material and the second polymerizable material to polymerize. There is not an optical boundary between the first and second layers since the first and second materials are polymerized together.

Claims

1. A diffuser structure comprising:

a structure having at least a first part and a second part, the first part diffusing light passing through the first part and including at least a first material, the second part providing at least one function other than diffusing light passing through the second part and including at least a second material,

wherein at least a portion of the at least a first material adjacent the second part is crosslinked to at least a portion of the at least a second material adjacent the first part.

2. The structure of claim 1, wherein the first part includes polymerized material and non-polymerized material.

3. The structure of claim 2, wherein the non-polymerized material is liquid crystal material.

4. The structure of claim 2, wherein the non-polymerized material is non-liquid crystalline organic material.

5. The structure of claim 2, wherein the non-polymerized material includes at least one of glass beads, or solid or colloidal particles.

6. The structure of claim 1, wherein the first part includes at least two polymerized materials having a refractive index differing by at least 0.005.

7. The structure of claim 1, wherein the at least a first material and the at least a second material are the same material.

8. The structure of claim 1, wherein the at least a first material and the at least a second material are different materials.

9. The structure of claim 1, wherein there is not an optical boundary between the first part and the second part.

10. The structure of claim 1, further comprising a light absorbing material adjacent the structure having at least a first part and a second part.

11. A diffuser structure including integrally formed diffusing elements comprising:

a polymerized structure including a diffusing part and another part, the diffusing part and the another part being integrally formed.

12. The structure of claim 11, wherein the diffusing part includes polymerized material and non-polymerized material.

13. The structure of claim 11, wherein the diffusing part and the another part include the same polymerized material.

14. The structure of claim 11, wherein the diffusing part and the another part include different polymerized materials.

15. The structure of claim 11, wherein an area in a light output side of the diffusing part is smaller than an area of a light input side of the another part.

16. The structure of claim 11, wherein the another part is a polymerized structure and has side walls substantially without diffractive variations.

17. The structure of claim 11, wherein the another part is a waveguide.

18. The structure of claim 11, wherein there is not an optical boundary between the diffusing part and the another part.

19. The structure of claim 11, wherein the diffusing part includes a scattering material.

20. The structure of claim 19, wherein the scattering material is a liquid crystal material.

21. The structure of claim 11, further comprising a light absorbing material adjacent the polymerized structure.

22. A method of forming an integrated diffuser comprising:

depositing a first layer including a first polymerizable material and another material;

depositing a second layer including a second polymerizable material adjacent the first layer; and

simultaneously irradiating the first layer and the second layer with light that causes the first polymerizable material and the second polymerizable material to polymerize,

wherein the another material causes light diffusion once the first polymerizable material is polymerized by the simultaneously irradiating.

23. The method of claim 22, wherein the another material is polymerizable material.

24. The method of claim 22, wherein the another material is non-polymerizable material.

25. The method of claim 22, wherein the first polymerizable material and the second polymerizable material are the same polymerizable material.

26. The method of claim 22, wherein the first polymerizable material and the second polymerizable material are different polymerizable materials.

27. The method of claim 22, wherein a mechanical oscillation is applied to the first layer and the second layer during the simultaneously irradiating the first layer and the second layer with light.

28. The method of claim 22, wherein the first layer forms optical diffusing elements and the second layer forms a waveguide after the simultaneously irradiating the first layer and the second layer with light.

29. The method of claim 22, wherein there is not an optical boundary between the first layer and the second layer after the simultaneously irradiating the first layer and the second layer with light.

30. The method of claim 22, wherein the another material is a liquid crystal material.

31. The method of claim 22, wherein the first layer is a polymer dispersed liquid crystal layer after being irradiated with light.

33. The method of claim 22, wherein the simultaneously irradiating the first layer and the second layer with light cause phase separation in the first layer

34. The method of claim 22, further comprising removing portions of the first layer and the second layer that are unpolymerized after the simultaneously irradiating the first layer and the second layer with light;

and

depositing a light absorbing material adjacent the portions of the first layer and the second layer that are polymerized after the simultaneously irradiating the first layer and the second layer with light.

35. The method of claim 22, wherein the depositing a first layer and the depositing a second layer are performed in a single deposition.

36. The method of claim 22, wherein the depositing a first layer and the depositing a second layer are performed in sequential depositions.

32. The method of 22, wherein the another material is non-liquid crystalline organic material.