Quantum rod composition, quantum rod film and display device including the same

Patent metadata

Field	Value
Publication number	US-10174249-B2
Application number	US-201514935294-A
Country	US
Kind code	B2
Filing date	Nov 6, 2015
Priority date	Nov 13, 2014
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

Embodiments relate to a quantum rod composition, a quantum rod film, a display device with a quantum rod film, and a method of forming a quantum rod film. The quantum rod film includes a plurality of quantum rods and a polymer with a dipole side chain. Responsive to an external electric field, the major axis of the quantum rods and an axis of the dipole side chain arranges in the same direction. The display device includes a plurality of pixel and common electrodes for generating an electric field, and a backlight unit positioned under a first substrate. Responsive to receiving light from the backlight unit, the quantum rod film emits light polarized in a direction parallel to the major axis of the quantum rods.

First claim

What is claimed is:

1. A quantum rod composition, comprising:
a plurality of quantum rods;
a polymer comprising:
a main chain; and
a plurality of side chains attached to the main chain; and

a solvent,
wherein the plurality of side chains are configured to generate an induced dipole, and wherein the plurality of side chains comprises at least one selected from the group consisting of:

wherein R is selected from the group consisting of F, CF 3 , and CN.

2. The quantum rod composition of claim 1 , wherein responsive to an external electric field, a major axis of the plurality of quantum rods and an axis of the plurality of side chains are arranged along a direction substantially parallel to the external electric field.

3. The quantum rod composition of claim 1 , wherein the main chain of the polymer is selected from polyoxetane, polysiloxane, or polyester.

4. The quantum rod composition of claim 1 , wherein each of the plurality of quantum rods comprises a core, or a core and a shell surrounding the core, the core having a sphere shape, an elliptical sphere shape, a polyhedral shape, or a rod shape, and the shell having a rod shape.

5. The quantum rod composition of claim 4 , wherein the core is formed from one or more of CdSe, CdTe, ZnO, ZnSe, ZnS, ZnTe, HgSe, and CdZnSe.

6. A quantum rod film, comprising:
a plurality of quantum rods; and
a polymer comprising:
a main chain; and
a plurality of side chains attached to the main chain,

wherein a major axis of the plurality of quantum rods and an axis of the plurality of side chains are arranged along a same direction, and
wherein the plurality of side chains are configured to generate an induced dipole, wherein the plurality of side chains comprises at least one selected from the group consisting of:

wherein R is selected from the group consisting of F, CF 3 , and CN.

7. The quantum rod film of claim 1 , wherein the main chain of the polymer is selected from polyoxetane, polysiloxane, or polyester.

8. The quantum rod film of claim 6 , wherein each of the plurality of quantum rods comprises a core, or a core and a shell surrounding the core, the core having a sphere shape, an elliptical sphere shape, a polyhedral shape, or a rod shape, and the shell having a rod shape.

9. The quantum rod film of claim 8 , wherein the core is formed from one or more of CdSe, CdTe, ZnO, ZnSe, ZnS, ZnTe, HgSe, and CdZnSe.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Kyu-Nam
• Kim Jin-Wuk
• Kim Byung-Geol
• Jang Kyung-Kook
• Kim Hee-Yeol
• Woo Sung-Il
• Lee Tae-Yang

Classifications

• C09K11/883 Primary

  with zinc or cadmium · CPC title

• G02F2201/124

  interdigital · CPC title

• G02F2201/086

  UV absorbing · CPC title

• C09K11/565

  with zinc cadmium · CPC title

• B05D3/14

  by electrical means · CPC title