Display element

Patent metadata

Field	Value
Publication number	US-10509273-B2
Application number	US-201615553388-A
Country	US
Kind code	B2
Filing date	Jun 10, 2016
Priority date	Jun 12, 2015
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

A display element, a method for manufacturing the same, and a use thereof are provided. The display element can induce a decrease in driving voltage without reducing a difference in a cell gap, have durability by ensuring proper adhesion characteristics, and, specifically, can effectively overcome a problem of the display element including a vertical alignment adhesive layer, in particular, a problem of increasing driving voltage, which can be generated when the thickness is increased so as to improve the adhesion characteristics.

First claim

What is claimed is:

1. A display element, comprising:
a first substrate;
a second substrate arranged opposite to said first substrate;
a barrier rib pattern and an intermediate layer positioned between the first substrate and the second substrate, and
a vertical alignment adhesive layer positioned between the first substrate and the intermediate layer, and between the first substrate and the barrier rib pattern,
wherein the vertical alignment adhesive layer comprises functional nanoparticles and a vertical alignment silicon-based adhesive, wherein the functional nanoparticles are selected from the group consisting of indium tin oxide (ITO) nanoparticles, silver (Ag) nanowires, and silica nanoparticles, and
wherein the vertical alignment adhesive layer imparts a vertical alignment to a material in the intermediate layer,
wherein
the vertical alignment adhesive layer comprises the functional nanoparticles so as to satisfy the following equations 1 and 2:
G i ×100≤ G N ≤1×10 10 S/m  [Equation 1]

wherein, G N represents an electric conductivity value (S/m) of the vertical alignment adhesive layer comprising the functional nanoparticles, and G i represents an electric conductivity value (S/m) of a vertical alignment adhesive layer that does not comprise the functional nanoparticles
C i ×1.5≤ C N ≤50  [Equation 2]

wherein, C N represents a dielectric constant value of the vertical alignment adhesive layer comprising the functional nanoparticles and Ci represents a dielectric constant value of a vertical alignment adhesive layer that does not comprise the functional nanoparticles.

2. The display element according to claim 1 , wherein
the vertical alignment adhesive layer contains the functional nanoparticles in a weight ratio of 0.005% by weight to 60% by weight, based on the total weight of the vertical alignment adhesive layer.

3. The display element according to claim 1 , wherein
the functional nanoparticles are conductive nanoparticles or dielectric nanoparticles.

4. The display element according to claim 3 , wherein
the conductive particles have an electric conductivity of 1.0×10 1 S/m or more.

5. The display element according to claim 1 , wherein
the functional nanoparticles have a spherical nanoparticle, nanotube, nanowire, nanorod, or nanoring shape.

6. The display element according to claim 1 , wherein
the vertical alignment adhesive layer has a thickness in a range of 0.1 μm to 100 μm.

7. The display element according to claim 1 , wherein
the intermediate layer is a light modulating layer containing a light modulating material or a light emitting layer containing a light emitting material.

8. The display element according to claim 7 , wherein
the light modulating layer is a liquid crystal layer, an electrochromic material layer, an electrophoretic material layer, or a dispersed particle alignment layer.

9. The display element according to claim 8 , wherein
the liquid crystal layer comprises a liquid crystal compound.

10. The display element according to claim 9 ,
further comprising:
a vertical alignment film positioned between the intermediate layer and the second substrate, wherein said vertical alignment film is in contact with the liquid crystal layer to vertically align the liquid crystal compound in said liquid crystal layer.

11. A display device comprising the display element of claim 1 .

12. The display device according to claim 11 , wherein
the display device is an electroluminescence display device (ELD), a liquid crystal display device (LCD), an electrochromic display device (ECD), an electrophoretic image display device (EPD) or a suspended particle display device (SPD).

13. A method for manufacturing a display element, comprising:
providing a first substrate having a vertical alignment adhesive layer disposed thereon, wherein the vertical alignment adhesive layer comprising functional nanoparticles and a vertical alignment silicon-based adhesive, and a second substrate having a barrier rib pattern and an intermediate layer disposed thereon; and
bonding the first substrate to the second substrate such that the vertical alignment layer of the first substrate is adhered to the barrier rib pattern of the second substrate,
wherein the functional nanoparticles are selected from the group consisting of indium tin oxide (ITO) nanoparticles, silver (Ag) nanowires, and silica nanoparticles,
wherein the vertical alignment adhesive layer imparts a vertical alignment to a material in the intermediate layer, and
wherein
the vertical alignment adhesive layer comprises the functional nanoparticles so as to satisfy the following equations 1 and 2:
G i ×100≤ G N ≤1×10 10 S/m  [Equation 1]

wherein, G N represents an electric conductivity value (S/m) of the vertical alignment adhesive layer comprising the functional nanoparticles, and G i represents an electric conductivity value (S/m) of a vertical alignment adhesive layer that does not comprise the functional nanoparticles
C i ×1.5≤ C N ≤50  [Equation 2]

wherein, C N represents a dielectric constant value of the vertical alignment adhesive layer comprising the functional nanoparticles and Ci represents a dielectric constant value of a vertical alignment adhesive layer that does not comprise the functional nanoparticles.

14. The method for manufacturing a display element according to claim 13 , wherein
the vertical alignment adhesive layer comprises the functional nanoparticles in a ratio of 0.005% by weight to 60% by weight, based on the total weight of the vertical alignment adhesive layer.

Assignees

• Lg Chemical Ltd

Inventors

• You Jung Sun
• Kwon Yoon Kyung
• Oh Dong Hyun
• Min Sung Joon
• Kim Jin Hong
• Kim Jung Woon
• Lim Eun Jung

Classifications

• G02F2202/28

  Adhesive materials or arrangements · CPC title

• G02F1/133711

  by organic films, e.g. polymeric films · CPC title

• G02F1/172

  based on a suspension of orientable dipolar particles, e.g. suspended particles displays · CPC title

• G02F2202/36

  Micro- or nanomaterials · CPC title

• G02F1/15

  based on an electrochromic effect · CPC title