Display device and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-9817252-B2
Application number	US-201314348362-A
Country	US
Kind code	B2
Filing date	Jun 17, 2013
Priority date	Apr 8, 2013
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A display device and a manufacturing method thereof are disclosed. The display device comprises an upper substrate ( 103 ), a lower substrate ( 104 ), a solvent ( 102 ), and ellipsoids ( 101 ), and the solvent ( 102 ) and the ellipsoids ( 101 ) are provided between the upper substrate ( 103 ) and the lower substrate ( 104 ). The ellipsoids are configured for forming photonic crystals and have electromagnetic characteristics. By means of photonic crystals formed by the ellipsoids having a shape of oval spheres with a size in order of nanometer or sub-micrometer, the display device can change wavelength of reflected light and present different colors, thus color images can be displayed.

First claim

The invention claimed is:

1. A display device comprising an upper substrate, a lower substrate and a solvent between the two substrates, the display device further comprising ellipsoids between the upper substrate and the lower substrate, the ellipsoids configured for forming photonic crystal and having electromagnetic characteristics, wherein
outer shells of the ellipsoids are each provided with a polymer modification layer; and
a material for the polymer modification layer comprises decyltrimethylammonium bromide, polyvinyl pyrrolidone, or nonyltrimethylammonium bromide;
the display device further comprising supplementary light sources, wherein the supplementary light sources are LEDs or OLEDs;
wherein:
the supplementary light sources are evenly disposed on a frame of the display device;
or, the supplementary light sources are evenly disposed on the upper substrate of the display device, and a black frame is disposed inside the display device, the black frame is disposed at a position corresponding to the supplementary light sources and over the supplementary light sources;
or, the supplementary light sources are evenly disposed on a frame of the display device, and the supplementary light sources are evenly disposed on the upper substrate of the display device, and a black frame is disposed inside the display device, the black frame is disposed at a position corresponding to the supplementary light sources and over the supplementary light sources.

2. The display device according to claim 1 , wherein outer shells of the ellipsoids are each provided with an electrolyte layer;
or, magnetic kernels are provided inside the ellipsoids;
or, outer shells of the ellipsoids are each provided with an electrolyte layer and magnetic kernels are provided inside the ellipsoids.

3. The display device according to claim 2 , wherein a material for the ellipsoids is an inorganic composite material or an organic composite material;
the inorganic composite material comprises silicon oxide, titanium oxide, or ferric oxide; and
the organic composite material comprises polystyrene or polymethyl methacrylate.

4. The display device according to claim 2 , wherein the solvent comprises an organic dispersing solvent.

5. The display device according to claim 2 , further comprising a reflective layer, a light reflective surface of which is subject to roughing treatment, the reflective layer being disposed over the lower substrate.

6. The display device according to claim 1 , wherein a material for the ellipsoids is an inorganic composite material or an organic composite material;
the inorganic composite material comprises silicon oxide, titanium oxide, or ferric oxide; and
the organic composite material comprises polystyrene or polymethyl methacrylate.

7. The display device according to claim 6 , wherein the solvent comprises an organic dispersing solvent.

8. The display device according to claim 6 , further comprising a reflective layer, a light reflective surface of which is subject to roughing treatment, the reflective layer being disposed over the lower substrate.

9. The display device according to claim 1 , wherein the solvent comprises an organic dispersing solvent.

10. The display device according to claim 1 , further comprising a reflective layer, a light incident surface of which is subject to roughing treatment, the reflective layer being disposed over the lower substrate.

11. A method for manufacturing a display device, the method comprising:
preparing transparent conductive film layers on an upper substrate and a lower substrate, respectively, the transparent conductive film layers being disposed opposite to each other;
forming a metal reflective layer on the lower substrate on which the transparent conductive film layer has been formed;
preparing a driving array on the lower substrate on which the metal reflective layer has been formed;
adding a microsphere emulsion between the upper substrate and the lower substrate, and sealing the display device; the microsphere emulsion comprising ellipsoids and a solvent, the ellipsoids being configured for forming photonic crystal and having electromagnetic characteristics; and
modifying the outer shells of the ellipsoids with polymer so as to form the ellipsoids with a polymer modification layer on the outer shells; wherein,
a material for the polymer modification layer comprises decyltrimethylammonium bromide, polyvinyl pyrrolidone, or nonyltrimethylammonium bromide;
setting supplementary light sources, wherein the supplementary light sources are LEDs or OLEDs;
wherein:
the supplementary light sources are evenly disposed on a frame of the display device;
or, the supplementary light sources are evenly disposed on the upper substrate of the display device, and a black frame is disposed inside the display device, the black frame is disposed at a position corresponding to the supplementary light sources and over the supplementary light sources;
or, the supplementary light sources are evenly disposed on a frame of the display device, and the supplementary light sources are evenly disposed on the upper substrate of the display device, and a black frame is disposed inside the display device, the black frame is disposed at a position corresponding to the supplementary light sources and over the supplementary light sources.

12. The method for manufacturing a display device according to claim 11 , wherein preparing of the ellipsoids comprising:
preparing ellipsoids with silicon oxide, titanium oxide, ferric oxide, polystyrene or polymethyl methacrylate;
coating positively or negatively charged electrolyte on one end of the ellipsoids so as to form an electrolyte layer; or, coating positively charged electrolyte on one end of the ellipsoids and coating negatively charged electrolyte on the other end of the ellipsoids, so as to form the ellipsoids with outer shells each coated by an electrolyte layer.

13. The method for manufacturing a display device according to claim 11 , wherein preparing of the ellipsoid comprising:
coating an outer shell material of the ellipsoids on an outer surface of a magnetic substance to form the ellipsoids with an inner magnetic kernel, the outer shell material comprising silicon oxide, titanium oxide, ferric oxide, polystyrene or polymethyl methacrylate.

Assignees

• Beijing Boe Display Tech Co
• Boe Technology Group Co Ltd

Inventors

• Liang Kui
• Yuan Jianfeng
• Rim Seung Moo

Classifications

• G02F1/0305 Primary

  Constructional arrangements (G02F1/0327 - G02F1/05 take precedence) · CPC title

• G02F1/167

  by electrophoresis · CPC title

• G02F2001/133616

  Physics · mapped topic

• G02F1/19

  based on variable-reflection or variable-refraction elements not provided for in groups G02F1/015 - G02F1/169 · CPC title

• G02B1/005

  made of photonic crystals or photonic band gap materials (photonic band-gap structures or photonic lattices in integrated optics G02B6/1225; photonic band-gap structures or photonic lattices in optical fibres G02B6/02295) · CPC title