Quantum dot lens and backlight module

Patent metadata

Field	Value
Publication number	US-12189235-B2
Application number	US-202117298631-A
Country	US
Kind code	B2
Filing date	Apr 25, 2021
Priority date	Apr 12, 2021
Publication date	Jan 7, 2025
Grant date	Jan 7, 2025

Abstract

A quantum dot lens and a backlight module are provided. The quantum dot lens includes a lens body and a quantum-dot homogeneous-sol material. Wherein, the lens body has a light incident surface and a light exiting surface. The light exiting surface has a groove. The quantum-dot homogeneous-sol material is filled in the groove. Embodiments of the present application allow luminous efficacy and power efficiency to be improved.

First claim

What is claimed is:

1. A quantum dot lens used for light distribution for a light source, comprising:
a lens body having a light incident surface and a light exiting surface, wherein the light exiting surface has a groove; and
a quantum-dot homogeneous-sol material filled in the groove;
wherein the lens body has a central axis, the groove and the lens body are arranged coaxially, a bottom wall of the groove recesses toward the light incident surface along the central axis of the lens body, a depth of the groove decreases radially from the central axis of the lens body to a periphery of the lens body, and the light source is a Lambertian light source.

2. The quantum dot lens as claimed in claim 1 , wherein the bottom wall of the groove recesses toward a direction facing away from a center of the light exiting surface; or
the bottom wall of the groove protrudes toward the center of the light exiting surface; or
the bottom wall of the groove is in an inverted conical shape or in an inverted pyramidal shape; or
a groove wall of the groove comprises a curving surface.

3. The quantum dot lens as claimed in claim 1 , wherein a plane where an opening of the groove is located is perpendicular to the central axis of the lens body.

4. The quantum dot lens as claimed in claim 1 , wherein the lens body is in a conical-frustum shape, an area of the light exiting surface is greater than an area of the light exiting surface.

5. The quantum dot lens as claimed in claim 1 , wherein a central axis of the light source overlaps the central axis of the lens body.

6. The quantum dot lens as claimed in claim 1 , wherein the light source is a light emitting diode (LED) chip.

7. The quantum dot lens as claimed in claim 1 , wherein the quantum dot lens further includes a cover body, and the cover body covers on an opening of the groove.

8. The quantum dot lens as claimed in claim 7 , wherein the cover body is sealedly connected to the lens body.

9. The quantum dot lens as claimed in claim 7 , wherein an interior of the groove is in a vacuum state.

10. A backlight module, comprising at least one quantum dot lens as claimed in claim 1 and at least one light source, wherein each of the light source is provided with one quantum dot lens, and the light incident surface of the quantum dot lens faces the light source.

11. A quantum dot lens used for light distribution for a light source, comprising:
a lens body having a light incident surface and a light exiting surface, wherein the light exiting surface has a groove; and
a quantum-dot homogeneous-sol material filled in the groove.

12. The quantum dot lens as claimed in claim 11 , wherein the lens body has a central axis, the groove and the lens body are arranged coaxially, a bottom wall of the groove recesses toward the light incident surface along the central axis of the lens body, a depth of the groove decreases radially from the central axis of the lens body to a periphery of the lens body.

13. The quantum dot lens as claimed in claim 12 , wherein the bottom wall of the groove recesses toward a direction facing away from a center of the light exiting surface; or
the bottom wall of the groove protrudes toward the center of the light exiting surface; or
the bottom wall of the groove is in an inverted conical shape or in an inverted pyramidal shape;
a groove wall of the groove comprises a curving surface.

14. The quantum dot lens as claimed in claim 12 , wherein a plane where an opening of the groove is located is perpendicular to the central axis of the lens body.

15. The quantum dot lens as claimed in claim 11 , wherein the lens body is in a conical-frustum shape, an area of the light exiting surface is greater than an area of the light exiting surface.

16. The quantum dot lens as claimed in claim 11 , wherein a central axis of the light source overlaps a central axis of the lens body.

17. The quantum dot lens as claimed in claim 11 , wherein the light source is a Lambertian light source.

18. The quantum dot lens as claimed in claim 11 , wherein the quantum dot lens further includes a cover body, and the cover body covers on an opening of the groove.

19. The quantum dot lens as claimed in claim 18 , wherein the cover body is sealedly connected to the lens body.

20. The quantum dot lens as claimed in claim 18 , wherein an interior of the groove is in a vacuum state.

Assignees

• Huizhou China Star Optoelectronics Display Co Lt
• Huizhou China Star Optoelectronics Display Co Ltd

Inventors

• Fu Linlin

Classifications

• G02F1/133603

  with LEDs · CPC title

• G02B3/12 Primary

  Fluid-filled or evacuated lenses · CPC title

• G02F1/133606 Primary

  including a specially adapted diffusing, scattering or light controlling members · CPC title

• G02F1/133607 Primary

  the light controlling member including light directing or refracting elements, e.g. prisms or lenses · CPC title

• G02F1/133614

  using photoluminescence, e.g. phosphors illuminated by UV or blue light · CPC title