Near-eye display and near-eye display system

• US 11,086,131 B2
• Filed: 09/20/2019
• Issued: 08/10/2021
• Est. Priority Date: 03/23/2017
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Ou, Jian, Liang, Ying, Li, Songlin
• Primary Examiner(s): Dicke, Chad M
• Application Number:
  US16/577,809
• Publication Number:
  US 20200018969A1
• Time in Patent Office: 690 Days
• CPC Class Codes: G02B 17/002 Arrays of reflective systems
• CPC Class Codes: G02B 2027/0116 comprising devices for correcting chromatic aberration
• CPC Class Codes: G02B 2027/0123 comprising devices increasing the field of view
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 3/0043 Inhomogeneous or irregular arrays, e.g. varying shape, size, height
• CPC Class Codes: G02B 3/0056 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 Class Codes: G02B 3/0068 arranged in a single integral body or plate, e.g. laminates or hybrid structures with other optical elements G02B5/1885, G02B17/002, G02B30/27 take precedence
• CPC Class Codes: G02B 5/045 Prism arrays

Abstract

A near-eye display and a near-eye display system are provided. The near-eye display includes a display panel, a collimation lens component, and an optical redirector. The display panel includes a plurality of pixels that are disposed in a tiling manner. The collimation lens component includes a plurality of collimation lenses, and the plurality of collimation lenses are in a one-to-one correspondence with the plurality of pixels. Each of the plurality of collimation lenses is configured to: convert, into collimated light, light emitted by a corresponding pixel, and input the collimated light into the optical redirector. The optical redirector includes a plurality of light convergence structures, and the plurality of light convergence structures are in a one-to-one correspondence with the plurality of collimation lenses. Each of the plurality of light convergence structures is configured to converge, on a focus of the near-eye display, collimated light input by a corresponding collimation lens.

Claims

1. A near-eye display, comprising:

a display panel;

having a plurality of pixels that are disposed in a tiling manner, every two adjacent pixels in the plurality of pixels are disposed with a spacing therebetween, and a first light-transmissive transparent substrate material is filled between every two adjacent pixels; and

a collimation lens component and an optical redirector that are successively disposed on a light emitting side of the display panel, wherein

the collimation lens component comprises a plurality of collimation lenses, the plurality of collimation lenses are in a one-to-one correspondence with the plurality of pixels, each of the plurality of collimation lenses is configured to;

convert, into collimated light, light emitted by a corresponding pixel, and input the collimated light into the optical redirector, every two adjacent collimation lenses in the plurality of collimation lenses are disposed with a spacing therebetween, and a second light-transmissive transparent substrate material is filled between every two adjacent collimation lenses; and

the optical redirector comprises a plurality of light convergence structures, the plurality of light convergence structures are in a one-to-one correspondence with the plurality of collimation lenses, each of the plurality of light convergence structures is configured to converge, on a focus of the near-eye display, collimated light input by a corresponding collimation lens, the focus of the near-eye display falls within an eyeball of a user, every two adjacent light convergence structures in the plurality of light convergence structures are disposed with a spacing therebetween, and a third light-transmissive transparent substrate material is filled between every two adjacent light convergence structures.

2. The near-eye display according to claim 1, wherein each of the plurality of pixels comprises at least one light emitting unit, a collimation lens corresponding to each pixel comprises at least one collimation sub-lens that is in a one-to-one correspondence with the at least one light emitting unit, and each collimation sub-lens converts, into collimated light, light emitted by a light emitting unit corresponding to each collimation sub-lens.

3. The near-eye display according to claim 2, wherein each pixel comprises a red light emitting unit, a green light emitting unit, and a blue light emitting unit, each collimation lens comprises three collimation sub-lenses, and a red light emitting unit, a green light emitting unit, and a blue light emitting unit in a same pixel are in a one-to-one correspondence with three collimation sub-lenses in a same collimation lens;

and

a minimum distance T from each of the red light emitting unit, the green light emitting unit, and the blue light emitting unit in the same pixel to each corresponding collimation sub-lens meets the following formula;

4. The near-eye display according to claim 2, wherein a light shielding groove is disposed between two adjacent collimation sub-lenses in a same collimation lens, and the light shielding groove is filled with a light absorption material.

5. The near-eye display according to claim 2, wherein a light convergence structure corresponding to each collimation lens comprises a light convergence sub-structure that is in a one-to-one correspondence with the at least one collimation sub-lens, and each light convergence sub-structure converges, on the focus of the near-eye display, collimated light emitted by a collimation sub-lens corresponding to each light convergence sub-structure.

6. The near-eye display according to claim 5, wherein the light convergence sub-structure is a refraction structure, the refraction structure comprises a first refraction surface, and the first refraction surface refracts, to the focus of the near-eye display, collimated light emitted by a collimation sub-lens corresponding to the refraction structure.

7. The near-eye display according to claim 6, wherein the first refraction surface is a first refraction plane, the first refraction plane is located on a side that is of the refraction structure and that is close to the display panel, a line of intersection exists between a plane in which the refraction plane is located and a plane in which a second refraction plane that is of the refraction structure and that is away from the display panel is located, a minimum included angle between the line of intersection and an x-axis is Φ

the x-axis is a straight line, the x-axis is parallel to a straight line on which a line between centers of two eyeballs of the user is located, and Φ

meets the following formula;

8. The near-eye display according to claim 5, wherein the light convergence sub-structure is a reflection structure, the reflection structure comprises a first reflection surface, and the first reflection surface reflects, to the focus of the near-eye display, collimated light emitted by a collimation sub-lens corresponding to the reflection structure.

9. The near-eye display according to claim 8, wherein the first reflection surface is a first reflection plane, the reflection structure further comprises a third refraction plane, the first reflection plane totally reflects the collimated light emitted by the collimation sub-lens corresponding to the reflection structure, the totally reflected light is refracted at the third refraction plane, and the refracted light is output to the focus of the near-eye display.

10. The near-eye display according to claim 9, wherein the reflection structure is a triangular prism, the triangular prism comprises an upper surface facing the display panel, a first upper prism edge and a second upper prism edge that are opposite to each other in the upper surface, a lower prism edge away from the upper surface, the first reflection plane, and the third refraction plane, the first upper prism edge and the lower prism edge are opposite to each other and are both located in the third refraction plane, the second upper prism edge and the lower prism edge are opposite to each other and are both located in the first reflection plane, and the lower prism edge is a line of intersection between the third refraction plane and the first reflection plane;

and

light emitted by each of the at least one light emitting unit is input from an upper surface of a corresponding triangular prism, and is totally reflected at the first reflection plane, the totally reflected light is refracted at the third refraction plane, and the refracted light is output to the focus of the near-eye display.

11. The near-eye display according to claim 10, wherein a minimum included angle between the lower prism edge of the triangular prism and an x-axis is ω

, and ω

meets;

12. The near-eye display according to claim 7, wherein the curvature radius r of the near-eye display field-of-view arc surface meets the following formula:

13. A near-eye display system, comprising:

a near-eye display comprises a display panel and a collimation lens component and an optical redirector that are successively disposed on a light emitting side of the display panel,

wherein the display panel comprises a plurality of pixels that are disposed in a tiling manner, every two adjacent pixels in the plurality of pixels are disposed with a spacing therebetween, and a light-transmissive transparent substrate material is filled between every two adjacent pixels;

the collimation lens component comprises a plurality of collimation lenses, the plurality of collimation lenses are in a one-to-one correspondence with the plurality of pixels, each of the plurality of collimation lenses is configured to;

convert, into collimated light, light emitted by a corresponding pixel, and input the collimated light into the optical redirector, every two adjacent collimation lenses in the plurality of collimation lenses are disposed with a spacing therebetween, and a light-transmissive transparent substrate material is filled between every two adjacent collimation lenses; and

the optical redirector comprises a plurality of light convergence structures, the plurality of light convergence structures are in a one-to-one correspondence with the plurality of collimation lenses, each of the plurality of light convergence structures is configured to converge, on a focus of the near-eye display, collimated light input by a corresponding collimation lens, the focus of the near-eye display falls within an eyeball of a user, every two adjacent light convergence structures in the plurality of light convergence structures are disposed with a spacing therebetween, and a light-transmissive transparent substrate material is filled between every two adjacent light convergence structures,

a transceiver, a drive chip, and a battery, wherein

the transceiver is configured to;

receive an image signal, and transmit the image signal to the drive chip;

the drive chip is configured to drive, based on the image signal received by the transceiver, the near-eye display to display an image;

the near-eye display is configured to;

display the image under the control of the drive chip, and project the displayed image into an eye of a user; and

the battery is configured to supply power to the near-eye display system.

14. The near-eye display system according to claim 13, wherein each of the plurality of pixels comprises at least one light emitting unit, a collimation lens corresponding to each pixel comprises at least one collimation sub-lens that is in a one-to-one correspondence with the at least one light emitting unit, and each collimation sub-lens converts, into collimated light, light emitted by a light emitting unit corresponding to each collimation sub-lens.

15. The near-eye display system according to claim 14, wherein each pixel comprises a red light emitting unit, a green light emitting unit, and a blue light emitting unit, each collimation lens comprises three collimation sub-lenses, and a red light emitting unit, a green light emitting unit, and a blue light emitting unit in a same pixel are in a one-to-one correspondence with three collimation sub-lenses in a same collimation lens;

and

a minimum distance T from each of the red light emitting unit, the green light emitting unit, and the blue light emitting unit in the same pixel to each corresponding collimation sub-lens meets the following formula;

16. The near-eye display system according to claim 14, wherein a light shielding groove is disposed between two adjacent collimation sub-lenses in a same collimation lens, and the light shielding groove is filled with a light absorption material.

17. The near-eye display system according to claim 14, wherein a light convergence structure corresponding to each collimation lens comprises a light convergence sub-structure that is in a one-to-one correspondence with the at least one collimation sub-lens, and each light convergence sub-structure converges, on the focus of the near-eye display, collimated light emitted by a collimation sub-lens corresponding to each light convergence sub-structure.

18. The near-eye display system according to claim 17, wherein the light convergence sub-structure is a refraction structure, the refraction structure comprises a first refraction surface, and the first refraction surface refracts, to the focus of the near-eye display, collimated light emitted by a collimation sub-lens corresponding to the refraction structure.