Reflective structure, display apparatus including the reflective structure, and methods of manufacturing the reflective structure and the display apparatus

• US 8,905,561 B2
• Filed: 08/11/2010
• Issued: 12/09/2014
• Est. Priority Date: 03/26/2010
• Status: Expired due to Fees

• Current Assignee: Korea Advanced Institute of Science and Technology, Samsung Electronics Co. Ltd.
• Original Assignee: Korea Advanced Institute of Science and Technology, Samsung Electronics Co. Ltd.
• Inventors: Han, Moon Gyu, Lee, Hong-seok, Shin, Jung H., Chung, Kyung Jae
• Primary Examiner(s): Sugarman, Scott J
• Assistant Examiner(s): Choudhury, Mustak
• Application Number:
  US12/805,642
• Publication Number:
  US 20110235182A1
• Time in Patent Office: 1,581 Days
• Field of Search: 359/487, 359/498, 359/583, 359/585, 359/615, 359619-629, 359/630, 359/633, 359/883, 430/5, 430/321, 428/143, 428/147, 428/212, 428/323, 427/162, 427/203, 427/299
• US Class Current: 359/883
• CPC Class Codes: B29D 11/00326 having particular surface properties, e.g. a micropattern
• CPC Class Codes: B29D 11/00346 having nanosize structures or features, e.g. fillers
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: G02B 5/0816 Multilayer mirrors, i.e. having two or more reflecting layers G02B5/0883, G02B5/0891 take precedence
• CPC Class Codes: G02B 5/10 with curved faces

Abstract

Provided are a reflective structure, a display apparatus including the reflective structure, and methods of manufacturing the reflective structure and the display apparatus. The reflective structure may include a reflective layer having a multiple uneven structure. The reflective layer may have a curved surface as a result of a plurality of first uneven portions, and wherein the curved surface may has a plurality of second uneven portions having a scale less than that of the first uneven portions. The plurality of first uneven portions may have a micro-scale size, and the plurality of second uneven portions may have a nano-scale size. The reflective layer may be arranged on a lower structure including a plurality of nanoparticles. A flexible material layer may be formed on the reflective layer.

Claims

1. A reflective structure comprising:

a reflective layer, wherein the reflective layer has a curved surface as a result of a plurality of first uneven portions, and

wherein the curved surface has a plurality of second uneven portions having a nano-scale size less than a micro-scale size of the plurality of first uneven portions on the curved surface, and the plurality of second uneven portions are formed along an upper surface of each of the first uneven portions.

2. The reflective structure of claim 1, wherein the plurality of first uneven portions are in the range of tens to hundreds of micrometers in width.

3. The reflective structure of claim 1, wherein the plurality of second uneven portions are in the range of tens to hundreds of nanometers in width.

4. The reflective structure of claim 1, wherein the reflective layer is on a plurality of nanoparticles.

5. The reflective structure of claim 1, further comprising a transparent and flexible material layer on the reflective layer.

6. The reflective structure of claim 5, wherein the transparent and flexible material layer includes a polymer layer.

7. The reflective structure of claim 1, wherein the reflective structure is on a flexible substrate or a rigid substrate.

8. The reflective structure of claim 1, wherein at least a portion of the plurality of first uneven portions constitute a wrinkled shape.

9. The reflective structure of claim 1, wherein the reflective layer has a structure in which first layers and second layers are alternately stacked, and

wherein the first layer and the second layer are different dielectric layers, or one of the first layer and the second layer is a dielectric layer and the other one of the first layer and the second layer is a metal layer.

10. A display apparatus comprising the reflective structure of claim 1.

11. A method of manufacturing a reflective structure, the method comprising:

forming a reflective layer having an uneven surface as a result of a plurality of uneven portions having a nano-scale size; and

forming a plurality of uneven portions having a micro-scale size on the surface of the reflective layer while maintaining the plurality of uneven portions having a nano-scale size, wherein the plurality of uneven portions having a nano-scale size are formed along an upper surface of each of the plurality of uneven portions having a micro-scale size.

12. The method of claim 11, wherein the forming of the plurality of uneven portions having the micro-scale size includes rapid cooling the reflective layer.

13. The method of claim 12, wherein the rapid cooling of the reflective layer includes spraying a volatile liquid on the reflective layer.

14. The method of claim 11, wherein the forming of the reflective layer comprises:

forming a plurality of nanoparticles on a first substrate; and

forming the reflective layer on the plurality of nanoparticles,

wherein the reflective layer has an uneven surface as a result of the plurality of nanoparticles.

15. The method of claim 14, wherein at least some of the plurality of nanoparticles are formed in such a manner that a distance between adjacent nanoparticles is in the range of nanometers to tens of nanometers.

16. The method of claim 14, further comprising forming a transparent and flexible material layer on the reflective layer.

17. The method of claim 16, further comprising separating a stacked structure from the first substrate, wherein the stacked structure includes the plurality of nanoparticles, the reflective layer, and the transparent and flexible material layer.

18. The method of claim 17, further comprising adhering the stacked structure to a second substrate.

19. The method of claim 18, wherein the second substrate is a flexible substrate or a rigid substrate.

20. A method of manufacturing a reflective structure, the method comprising:

forming a plurality of nanoparticles on a first substrate;

forming a reflective layer on the first substrate so as to cover the plurality of nanoparticles;

forming a flexible material layer on the reflective layer; and

separating a stacked structure from the first substrate, wherein the stacked structure includes the plurality of nanoparticles, the reflective layer, and the flexible material layer.

wherein the reflective layer includes a plurality of first uneven portions having a micro-scale size and a plurality of second uneven portions having a nano-scale size, and

the plurality of second uneven portions are formed along an upper surface of each of the first uneven portions.

21. The method of claim 20, wherein the plurality of nanoparticles are of non-uniform size.

22. The method of claim 20, wherein the reflective layer has an uneven surface as a result of the plurality of nanoparticles.

23. The method of claim 20, further comprising adhering the stacked structure that is separated from the first substrate to a second substrate.

24. The method of claim 23, wherein the second substrate is a flexible substrate or a rigid substrate.