Stress-resistant component for use with quantum dots

• US 10,012,778 B2
• Filed: 01/04/2018
• Issued: 07/03/2018
• Est. Priority Date: 11/22/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Nick, Robert J., Sadasivan, Sridhar, Linton, John R.
• Primary Examiner(s): Gramling, Sean
• Assistant Examiner(s): Sufleta, II, Gerald J
• Application Number:
  US15/862,085
• Publication Number:
  US 20180128955A1
• Time in Patent Office: 180 Days
• Field of Search: 362600-634, 362293
• CPC Class Codes: G02B 6/0001 specially adapted for lighting devices or systems lighting or signalling on vehicles using light guides B60Q1/00; lighting devices for vehicle dashboards B60Q3/10; lighting devices for vehicle interior using light guides B60Q3/62; lighting devices mounted on the vehicle rear part using light guides F21S43/235; measuring arrangements having light conducting pointers G01D13/265; illumination of liquid crystal displays G02F1/1336; illuminated signs G09F13/00
• CPC Class Codes: G02B 6/0023 provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
• CPC Class Codes: Y10T 428/131 Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]

Abstract

A glass tube including quantum dots in a polymerized matrix is described. An optical component and other products including such glass tube, a composition including quantum dots, and methods are also disclosed.

Claims

1. A method for making an optical component comprising

preparing a glass tube defined by a light transmissive wall including a first full semicircle end and an opposite second full semicircle end and a pair of substantially parallel walls connecting the first full semicircle end and the second full semicircle end defining a uniform path length, wherein the full semicircle ends have an average thickness along a length of the tube which is smaller than an average thickness of the straight substantially parallel walls along the length of the tube;

introducing a polymerizable formulation including quantum dots into the glass tube, and

polymerizing the polymerizable formulation to form a matrix including quantum dots.

2. The method of claim 1, wherein the polymerizing step comprises subjecting the polymerizable formulation to Ultra Violet light.

3. The method of claim 2, wherein the polymerizable formulation resists yellowing, browning, or discoloration when subjected to light.

4. The method of claim 1 further comprising a step of sealing at least one open end of the glass tube.

5. The method of claim 4, wherein the glass tube is hermetically sealed.

6. The method of claim 4, wherein the glass tube is pseudo-hermetically sealed.

7. The method of claim 4, wherein the sealing step comprises sealing the at least one open end using glass or epoxy.

8. The method of claim 4, wherein the sealing step comprises

contacting the at least one open end with an epoxy;

and

drawing the epoxy into the at least one open end due to shrinkage action of a curing resin.

9. The method of claim 4, wherein the sealing step comprises

covering the at least one open end with a glass adhering material;

and

melting the at least one open end by heating the glass above the melting point of the glass and pinching the walls together to close the at least one open end to form a molten glass hermetic seal.

10. The method of claim 1 further comprising a step of exposing the glass tube including the quantum dots to light flux for a period of time sufficient to increase a photoluminescent efficiency of the optical component.

11. The method of claim 1 further comprising a step of exposing the glass tube including the quantum dots to light and heat for a period of time until a photoluminescent efficiency of the optical component reaches a substantially constant value.