Near-to-eye display device and wearable apparatus

Patent metadata

Field	Value
Publication number	US-12352982-B2
Application number	US-202117765061-A
Country	US
Kind code	B2
Filing date	Apr 30, 2021
Priority date	Apr 30, 2021
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

A near-to-eye display device and wearable apparatus are provided. The near-to-eye display device includes: pixel islands and micro-lenses in one-to-one correspondence with the pixel islands; wherein each pixel island emits light to a corresponding micro-lens so that the light reaches a predetermined viewing position after passing through the corresponding micro-lens. The near-to-eye display device further includes: super-lens units each including at least one super-lens; wherein the super-lens units are in one-to-one correspondence with the pixel islands; each super-lens unit is on a side of a corresponding pixel island proximal to the corresponding micro-lens, and an orthogonal projection of the super-lens unit on a plane where the corresponding pixel island is located covers the corresponding pixel island. The super-lens unit converges light, which is within a predetermined angle, emitted by the corresponding pixel island, to reduce a diffusion angle of the light emitted by the corresponding pixel island.

First claim

What is claimed is:

1. A near-to-eye display device, comprising: a plurality of pixel islands and a plurality of micro-lenses in one-to-one correspondence with the plurality of pixel islands; wherein each pixel island is configured to emit light to a corresponding micro-lens so that the light reaches a predetermined viewing position after passing through the corresponding micro-lens; wherein the near-to-eye display device further comprises:
a plurality of super-lens units each comprising at least one super-lens; wherein the plurality of super-lens units are in one-to-one correspondence with the plurality of pixel islands; each super-lens unit is on a side of a corresponding pixel island proximal to the corresponding micro-lens, and an orthogonal projection of the super-lens unit on a plane where the corresponding pixel island is located covers the corresponding pixel island; the super-lens unit is configured to converge light, which is within a predetermined angle, emitted by the corresponding pixel island, so as to reduce a diffusion angle of the light emitted by the corresponding pixel island;
wherein each super-lens comprises a base substrate and a plurality of nano-pillars on the base substrate, both ends of each of the plurality of nano-pillars are a wide end and a narrow end, respectively, the plurality of nano-pillars comprise upright structures and inverted structures that are mixed and arranged alternately on the base substrate, the upright structures refer to the nano-pillars with wide ends proximal to the base substrate, and the inverted structures refer to the nano-pillars with narrow ends proximal to the base substrate.

2. The near-to-eye display device of claim 1 , wherein each super-lens unit comprises a plurality of super-lenses, each pixel island comprises a plurality of pixel units, and the plurality of super-lenses are in one-to-one correspondence with the plurality of pixel units.

3. The near-to-eye display device of claim 2 , wherein each pixel unit comprises an organic light-emitting diode device or a micro-light emitting diode device.

4. The near-to-eye display device of claim 2 , wherein a distance between each pixel island and the corresponding micro-lens does not exceed a focal length of the corresponding micro-lens.

5. The near-to-eye display device of claim 1 , wherein a height-to-width ratio of each of the nano-pillars is in a range from 3:1 to 12:1.

6. The near-to-eye display device of claim 5 , wherein the height-to-width ratio of each of the nano-pillars is 5:1.

7. The near-to-eye display device of claim 5 , wherein the nano-pillars each have a height in a range from 350 nm to 550 nm and a radius in a range from 45 nm to 95 nm.

8. The near-to-eye display device of claim 5 , wherein each super-lens has a refractive index greater than 1.7.

9. The near-to-eye display device of claim 8 , wherein a material of the nano-pillars comprises silicon nitride.

10. The near-to-eye display device of claim 5 , wherein a distance between each pixel island and the corresponding micro-lens does not exceed a focal length of the corresponding micro-lens.

11. The near-to-eye display device of claim 1 , further comprising a transparent substrate, wherein the plurality of pixel islands and the plurality of micro-lenses are respectively fixed on two opposite sides of the transparent substrate; and the plurality of super-lenses are on a side of the transparent substrate proximal to the plurality of pixel islands.

12. The near-to-eye display device of claim 11 , wherein a distance between each pixel island and the corresponding micro-lens does not exceed a focal length of the corresponding micro-lens.

13. The near-to-eye display device of claim 1 , wherein the plurality of super-lens units are arranged in an array; the plurality of micro-lenses are arranged in an array; a distance between any adjacent two of the plurality of micro-lenses is between 0 mm and 10 mm; and a distance between two adjacent micro-lenses in a same column is between 0 mm and 10 mm.

14. The near-to-eye display device of claim 13 , wherein a distance between each pixel island and the corresponding micro-lens does not exceed a focal length of the corresponding micro-lens.

15. The near-to-eye display device of claim 1 , wherein a diameter of each of the micro-lenses is in a range from 30 μm to 10 mm.

16. The near-to-eye display device of claim 15 , wherein a distance between each pixel island and the corresponding micro-lens does not exceed a focal length of the corresponding micro-lens.

17. The near-to-eye display device of claim 1 , wherein a distance between each pixel island and the corresponding micro-lens does not exceed a focal length of the corresponding micro-lens.

18. The near-to-eye display device of claim 1 , further comprising: a base substrate; the micro-lenses are on a side of the base substrate distal to the pixel islands.

19. The near-to-eye display device of claim 18 , wherein the micro-lenses and the base substrate have a one-piece structure.

20. A wearable apparatus, comprising the near-to-eye display device of claim 1 .

Assignees

• Boe Technology Group Co Ltd

Inventors

• Huang Haitao
• Wu Huili
• Zhang Feng
• Cui Zhao
• Yu Yong
• Xu Chuanxiang
• Jing Lina

Classifications

• G02B27/0172

  characterised by optical features · CPC title

• G02B3/0056

  arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses (G02B3/0043 takes precedence; miniaturised objectives for electronic devices employing wafer level optics G02B13/0085) · CPC title

• G02B27/01

  Head-up displays · CPC title

• G02B3/0037 Primary

  characterized by the distribution or form of lenses · CPC title