CN-121995632-A - Near-eye display device

Abstract

A near-eye display device. The near-eye display device includes an optical system and a display screen. The optical system includes a lens. The display screen is positioned on the light incident side of the optical system. The image light emitted from the display screen is discrete beams, and the image light is configured such that a display screen thereof passes through a crystalline lens of a human eye as beamlets and is imaged on a retina. The diameter of the beamlets is not larger than the pupil diameter of the human eye. The display screen of the near-eye display device emits discrete light beams, so that the light beams reaching human eyes are light beams, and the light beams can weaken the effect of crystalline lenses in the human eye observation process. The lens can clearly see the display picture under the state of different diopters, so that the display picture formed on the retina is basically not influenced by the myopia and astigmatism problems of the human eye.

Inventors

• LI XIN
• FAN XING
• OU XIAOZE
• LI XIAOKAI

Assignees

• 北京字跳网络技术有限公司
• 脸萌有限公司

Dates

Publication Date

20260508

Application Date

20241108

Claims (18)

1. 1. A near-eye display device, comprising: An optical system comprising a lens; the display screen is positioned on the light incident side of the optical system; Wherein the image light emitted by the display screen is discrete light beams, and the image light is configured to be displayed on a screen, passes through a crystalline lens of human eyes in a fine light beam and is imaged on retina; the beamlets have a diameter smaller than a pupil diameter of the human eye.
2. 2. The near-eye display device of claim 1, wherein the display screen comprises a plurality of sub-pixels, each sub-pixel comprising a light emitting layer, at least one side of the light emitting layer being provided with a dimming structure; The light adjusting structure comprises a plurality of microstructures, and each sub-pixel corresponds to at least two microstructures so as to adjust the light rays emitted by the light emitting layer into a plurality of beams from one beam.
3. 3. The near-eye display device of claim 2, wherein the microstructure is located between the light emitting layer and the optical system and is configured to adjust a propagation direction of light rays exiting the light emitting layer to the microstructure to adjust the light rays exiting the light emitting layer from one beam to a plurality of beams.
4. 4. The near-eye display device of claim 3, wherein the display screen comprises a substrate on which the plurality of sub-pixel arrays are arranged, the microstructures comprising microlenses arranged in an array in a direction parallel to the substrate; The light rays emitted by the light emitting layer of each sub-pixel pass through at least two micro lenses so as to adjust the deflection angle of the light rays through the at least two micro lenses.
5. 5. The near-eye display device of claim 4, wherein a pitch between the sub-pixel and the microlens is a first pitch in a direction perpendicular to the substrate base plate, and a product of a ratio of a center line distance of two adjacent microlenses to the first pitch and an effective focal length of the optical system is not more than 4.3 mm.
6. 6. The near-eye display device of claim 5, wherein the display screen comprises a transparent cover plate; the transparent cover plate is positioned between the micro lens and the sub-pixel.
7. 7. The near-eye display device of claim 3, wherein the display screen comprises a substrate base plate, the plurality of sub-pixel arrays being arranged on the substrate base plate; the dimming structure comprises a first pattern layer, wherein the microstructures are a plurality of first pattern parts positioned on the first pattern layer, the first pattern layer is positioned on one side of the light-emitting layer away from the substrate base plate and is configured to transmit part of light rays passing through the first pattern layer; The micro-structures further comprise a plurality of micro-lenses arranged in an array, wherein the micro-lenses are positioned on one side of the first pattern layer far away from the substrate base plate; the microlenses are configured to adjust the deflection angle of light transmitted from the first pattern layer to adjust the light emitted from the light emitting layer from one beam to a plurality of beams.
8. 8. The near-eye display device of claim 7, wherein the sub-pixel comprises a first electrode and a second electrode on both sides of the light emitting layer, the first electrode being located between the light emitting layer and the substrate; The first pattern layer is positioned on one side of the second electrode away from the substrate base plate.
9. 9. The near-eye display device of claim 7, wherein a first space exists between at least two of the plurality of first pattern parts, and light emitted from the light emitting layer is transmitted through the first space.
10. 10. The near-eye display device of claim 7, wherein a ratio of a second pitch between the microlenses and the first pattern layer to a focal length of the microlenses in a direction perpendicular to the substrate base is 0.9-1.1.
11. 11. The near-eye display device of claim 2, wherein the dimming structure comprises a diffractive optical element located at the light exit side of the plurality of sub-pixels.
12. 12. The near-eye display device of claim 11, wherein the display screen further comprises a plurality of microlenses arranged in an array, the microlenses being located between the diffractive optical element and the plurality of sub-pixels; The micro-lens is configured to adjust a deflection angle of light rays emitted from the light emitting layer corresponding to one of the sub-pixels.
13. 13. The near-eye display device of claim 11, wherein the display screen comprises a transparent cover plate; the transparent cover plate is positioned between the diffractive optical element and the sub-pixel.
14. 14. The near-eye display device of claim 2, wherein the display screen comprises a substrate base plate, the plurality of sub-pixel arrays being arranged on the substrate base plate; the dimming structure is positioned between the light emitting layer and the substrate base plate; The dimming structure comprises a plurality of microstructures, and the microstructures are configured to reflect light rays emitted by the light emitting layer so as to adjust the light rays emitted by the light emitting layer into a plurality of beams from one beam.
15. 15. The near-eye display device of claim 14, wherein the sub-pixel further comprises a first electrode and a second electrode on both sides of the light emitting layer, the first electrode being located between the light emitting layer and the substrate base; the first electrode is multiplexed into the dimming structure.
16. 16. The near-eye display device of claim 15, wherein the first electrode comprises the plurality of microstructures, a second spacing being present between at least two microstructures of the plurality of microstructures.
17. 17. The near-eye display device of claim 1, wherein the beamlets have a diameter of less than 4.3 millimeters.
18. 18. The near-eye display device of any one of claims 1-17, wherein the optical system further comprises a transflective film, a reflective polarizing layer, a phase retarding film, and a linear polarizing film; The lens comprises a first surface and a second surface which are oppositely arranged on an optical axis of the optical system, wherein the first surface is positioned between the display screen and the second surface, the transflective film is positioned between the first surface and the display screen, the reflective polarizing layer is positioned on one side of the second surface away from the first surface, the phase retardation film is positioned on one side of the first surface away from the transflective film, and the linear polarizing film is positioned on one side of the reflective polarizing layer away from the transflective film.

Description

Near-eye display device Technical Field At least one embodiment of the present disclosure relates to a near-eye display device. Background Virtual Reality (VR) technology and Mixed Reality (MR) technology can provide users with a highly immersive and interactive experience. VR technology can let the user fully immerse in virtual environment, and MR technology can fuse virtual content with the real world, reinforcing user's sense of reality. Disclosure of Invention At least one embodiment of the present disclosure provides a near-eye display device. At least one embodiment of the present disclosure provides a near-eye display device, including an optical system including a lens, and a display screen located at an incident side of the optical system, wherein image light emitted from the display screen is a discrete light beam, the image light is configured such that a display screen thereof passes through a crystalline lens of a human eye in a beamlets and is imaged on a retina, and a diameter of the beamlets is smaller than a pupil diameter of the human eye. For example, according to at least one embodiment of the present disclosure, the display screen includes a plurality of sub-pixels, each sub-pixel includes a light emitting layer, at least one side of the light emitting layer is provided with a dimming structure, the dimming structure includes a plurality of microstructures, and each sub-pixel corresponds to at least two microstructures so as to adjust light rays emitted by the light emitting layer from one beam to multiple beams. For example, in accordance with at least one embodiment of the present disclosure, the microstructure is located between the light emitting layer and the optical system and is configured to adjust the propagation direction of light rays exiting the light emitting layer to the microstructure to adjust the light rays exiting the light emitting layer from one beam to multiple beams. For example, according to at least one embodiment of the present disclosure, the display screen includes a substrate, the plurality of sub-pixels are arranged in an array on the substrate, the micro-structure includes micro-lenses, the micro-lenses are arranged in an array in a direction parallel to the substrate, and light rays emitted from the light emitting layer of each sub-pixel pass through at least two micro-lenses so as to adjust a deflection angle of the light rays through at least two micro-lenses. For example, in accordance with at least one embodiment of the present disclosure, a pitch between the sub-pixel and the micro-lens is a first pitch in a direction perpendicular to the substrate, and a product of a ratio of a center line distance of two adjacent micro-lenses to the first pitch and an effective focal length of the optical system is not more than 4.3 mm. For example, in accordance with at least one embodiment of the present disclosure, the display screen includes a transparent cover plate positioned between the microlenses and the subpixels. For example, according to at least one embodiment of the present disclosure, the display screen includes a substrate, the plurality of sub-pixel arrays are arranged on the substrate, the dimming structure includes a first pattern layer, the plurality of microstructures are a plurality of first pattern portions located on the first pattern layer, the first pattern layer is located on a side of the light emitting layer away from the substrate and is configured to transmit a portion of light passing through the first pattern layer, the plurality of microstructures further include a plurality of microlenses arranged in an array, the microlenses are located on a side of the first pattern layer away from the substrate, and the microlenses are configured to adjust a deflection angle of the light transmitted from the first pattern layer so as to adjust the light emitted from the light emitting layer into a plurality of beams. For example, according to at least one embodiment of the present disclosure, the sub-pixel includes a first electrode and a second electrode located at both sides of the light emitting layer, the first electrode being located between the light emitting layer and the substrate, and the first pattern layer being located at a side of the second electrode remote from the substrate. For example, according to at least one embodiment of the present disclosure, a first space exists between at least two first pattern portions among the plurality of first pattern portions, and light emitted from the light emitting layer is transmitted through the first space. For example, according to at least one embodiment of the present disclosure, a ratio of a second interval between the microlenses and the first pattern layer to a focal length of the microlenses in a direction perpendicular to the substrate is 0.9-1.1. For example, in accordance with at least one embodiment of the present disclosure, the dimming structure includes a diffractive optical e