Reflective structure and display apparatus employing the same

Patent metadata

Field	Value
Publication number	US-9417362-B2
Application number	US-201213342591-A
Country	US
Kind code	B2
Filing date	Jan 3, 2012
Priority date	Dec 31, 2010
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

According to example embodiments, a reflective film includes a plurality of first concave-convex elements having a curved surface and a plurality of second concave-convex elements on the curved surface. The second concave-convex elements may be a smaller scale than a scale of the plurality of first concave-convex elements. The reflective structure may further include a color purity control element configured to reduce degradation of a color purity expressed by the reflective film. The color purity control element may be configured such that at least a complementary light with respect to a color light reflected by the reflective film travels in the same direction as the reflected color light.

First claim

What is claimed is:

1. A reflective structure comprising:
a reflective film configured to reflect, diffract, and diffuse incident light omni-directionally, the reflective film including,
a plurality of first concave-convex elements having a curved surface, and
a plurality of second concave-convex elements on the curved surface, the second concave-convex elements being a smaller scale than a scale of the first concave-convex elements, and
the reflective film including a plurality of first layers and a plurality of second layers alternately stacked in turns; and
a color purity control element configured to substantially reduce degradation of a color purity expressed by the reflective film, the color purity control element including a pair of complementary-color absorption layers made of different material from both the first layers and the second layers, the pair of complementary-color absorption layers directly on the first layers at opposite surfaces of the first layers and the second layers alternately stacked, respectively, the pair of complementary-color absorption layers configured to absorb a complementary light with respect to a color light reflected by the reflective film.

2. The reflective structure of claim 1 , further comprising:
a plurality of nano-particles, and
the reflective film is on the plurality of nano-particles.

3. The reflective structure of claim 1 , wherein a thickness of each of the second layers corresponds to λ/2, where λ is a center wavelength of the color light reflected by the reflective film, and the second layers have a different refractive index from silicon.

4. The reflective structure of claim 3 , wherein the second layers are silicon oxide.

5. A display apparatus comprising a reflective structure that includes:
a reflective film configured to reflect, diffract, and diffuse incident light omni-directionally, the reflective film including,
a plurality of first concave-convex elements having a curved surface, and
a plurality of second concave-convex elements on the curved surface, the second concave-convex elements being a smaller scale than a scale of the first concave-convex elements, and
the reflective film including a plurality of first layers and a plurality of second layers alternately stacked in turns; and
a color purity control element configured to substantially reduce degradation of a color purity expressed by the reflective film, the color purity control element including a pair of complementary-color absorption layers made of different material from both the first layers and the second layers, the pair of complementary-color absorption layers directly on the first layers at opposite surfaces of the first layers and the second layers alternately stacked, respectively, the pair of complementary-color absorption layers configured to absorb a complementary light with respect to a color light reflected by the reflective film.

6. The display apparatus of claim 5 , further comprising:
a plurality of nano-particles, and
the reflective film is on the plurality of nano-particles.

Assignees

• Han Moon-Gyu
• Jin Yong-Wan
• Shin Jung H
• Chung Kyung-Jae
• Samsung Electronics Co Ltd
• Korea Advanced Inst Sci & Tech

Inventors

• Han Moon-Gyu
• Jin Yong-Wan
• Shin Jung H
• Chung Kyung-Jae

Classifications

• G02F1/133553

  Reflecting elements (associated to illuminating devices G02F1/133605) · CPC title

• G02B3/005 Primary

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

• G02B5/26

  Reflecting filters (G02B5/28 takes precedence) · CPC title

• G02B5/128

  transparent spheres being embedded in matrix · CPC title

• G02B5/223

  containing organic substances, e.g. dyes, inks or pigments · CPC title