Near-eye display module, I-type composite display module, II-type composite display module, and III-type composite display module based on pixel-block-aperture structures

Patent metadata

Field	Value
Publication number	US-12413699-B2
Application number	US-202217832717-A
Country	US
Kind code	B2
Filing date	Jun 6, 2022
Priority date	Dec 6, 2019
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

The invention discloses a near-eye display module based on pixel-block-aperture structures, which includes more than one pixel-block-aperture structures. The divergence angle and propagation direction of the light beam from a pixel is specially modulated, and the light beams from pixels of adjacent pixel-block-aperture structures are endowed with different orthogonal characteristics, to guarantee the light beam from a pixel transmitting to the viewer's pupil only through corresponding aperture(s) for Maxwellian View or one-pupil-multi-view display. The arrangement of multiple pixel-block-aperture structures makes a large field of view (FOV) realizable, and the orthogonal-characteristics design can suppress the crosstalk between adjacent pixel-block-aperture structures effectively.

First claim

What is claimed is:

1. A near-eye display module based on pixel-block-aperture structures, comprising:
M pixel-block-aperture structures, each of which being constructed by mutually corresponded a pixel block, an aperture, a modulation component, an orthogonality generating component and an orthogonality detecting component, wherein a positive integer M≥2;
wherein, the pixel block is composed of pixels for optical information loading, and a pixel array is composed of the pixels of all pixel blocks of the M pixel-block-aperture structures; an aperture array is composed of all apertures of M pixel-block-aperture structures on an aperture surface; the modulation component is composed of modulation elements, which correspond to pixels of a corresponding pixel block in a one-to-one manner, to guide the light beam from a pixel to a corresponding aperture with a confined diverging angle; the orthogonality detecting component is attached to a corresponding aperture, for only allowing light of corresponding orthogonal characteristic passable, but blocking light of other non-corresponding orthogonal characteristic; the orthogonality generating component of each block-aperture structures is attached to a corresponding pixel block, endowing pass-through light with orthogonal characteristic same to that of a corresponding orthogonality detecting component;
a control device, which loads optical information onto a pixel at a time-point, with the optical information being the projecting information of a 3D scene to be displayed at the time-point along a line connecting the pixel and its corresponding aperture;
said near-eye display module based on pixel-block-aperture structures is configured that the N orthogonality detecting components of adjacent N pixel-block-aperture structures are with N kinds of orthogonal characteristics respectively, with the apertures attached by the orthogonality generating components of a same orthogonal characteristic taken as apertures of a same kind, wherein an integer M≥N≥2, and the light beam from a pixel is modulated by a corresponding modulation element, to guarantee its light distribution covers the corresponding aperture, but misses the non-corresponding apertures of the same kind.

2. The near-eye display module based on the pixel-block-aperture structures according to claim 1 , wherein the near-eye display module further comprises a projection device, which projects an enlarged virtual image of the pixel array to a projection surface, with the virtual image called as a pixel-array image;
wherein, optical information loaded onto a pixel at a time-point is the projecting information of a 3D scene to be displayed at the time-point along a line connecting the virtual image of the pixel and its corresponding aperture, with the virtual image of a pixel called as a pixel image, and light beam from a pixel can be equivalently seen as being from its virtual image on the projection surface.

3. The near-eye display module based on the pixel-block-aperture structures according to claim 1 , wherein the pixel-block-aperture structure further comprises a baffle, which blocks the light in the non-aperture zone.

4. The near-eye display module based on the pixel-block-aperture structures according to claim 2 , wherein the near-eye display module further comprises a relay device for guiding light from the pixel array to a corresponding pupil of a viewer;
wherein, the modulation element makes light from a corresponding pixel miss non-corresponding apertures of the same kind.

5. The near-eye display module based on the pixel-block-aperture structures according to claim 2 , wherein the pixel-block-aperture structure further comprises a light splitting device, which is attached to the corresponding pixel block and guides light from G groups of pixels of the pixel block to G zones, respectively, wherein G≥2,
and, G apertures covered by a corresponding orthogonality detecting component are placed in the G zones, respectively, with a pixel taking the aperture to which the light from the pixel is guided as the corresponding aperture, and the other (G−1) apertures as the non-corresponding apertures of a same kind.

6. The near-eye display module based on the pixel-block-aperture structures according to claim 1 , wherein a size of the aperture is smaller than that of a viewer's pupil.

7. The near-eye display module based on the pixel-block-aperture structures according to claim 5 , wherein a viewer's pupil perceives light beams through at least 2M apertures, and a size of the aperture is smaller than that of the viewer's pupil along their arrangement direction.

8. The near-eye display module based on the pixel-block-aperture structures according to claim 1 , wherein light beam from a pixel missing a non-corresponding aperture refers to that the transmission light intensity of the light beam through the non-corresponding aperture is less than 10% of that through the corresponding aperture.

9. The near-eye display module based on the pixel-block-aperture structures according to claim 1 , wherein the aperture is transmission-type or reflection-type.

10. The near-eye display module based on the pixel-block-aperture structures according to claim 1 , wherein the aperture has a phase modulation function for projecting an image of the corresponding pixel block which is named as an equivalent pixel block, and coverage angles of all the equivalent pixel blocks with respect to a point around the sub-apertures splice together seamlessly.

11. The near-eye display module based on the pixel-block-aperture structures according to claim 10 , wherein all equivalent pixel blocks are divided into two or more groups, and for each group of equivalent pixel blocks, the coverage angles of the group of equivalent pixel blocks with respect to a point around the sub-apertures splice together seamlessly.

12. The near-eye display module based on the pixel-block-aperture structures according to claim 1 , wherein the orthogonal characteristics are two linear polarizations with mutually perpendicular polarization directions, or two circular polarizations of left circular polarization and right left circular polarization, or timing characteristics being activated at different time-points, or combination of linear polarizations and timing characteristics, or combination of circular polarizations and timing characteristics;
wherein, timing characteristics get implemented by a light-valve array, whose light valves are attached to the apertures in a one-to-one manner, for activating the aperture by turning on a corresponding light valve,
and the function of the orthogonality generating device gets implemented by the control device, activating corresponding pixels by loading corresponding optical information when the aperture gets turned on.

13. The near-eye display module based on pixel-block-aperture structures according to claim 2 , wherein the projection device is an optical device with adjustable focal length;
wherein, the projection device is driven by the control device to generate multiple projection surfaces to different depths sequentially, with a pixel getting refreshed by projection optical information of the 3D scene to be displayed along the line connecting its virtual image and corresponding aperture synchronously;
or, the convergence depth of the viewer is real-time tracked by an external auxiliary device, and the projection device projects the projection surface to the convergence depth driven under the control device synchronously, with a pixel getting refreshed by projection optical information of the 3D scene to be displayed along the line connecting its virtual image and corresponding

Assignees

• Univ Sun Yat Sen

Inventors

• Liu Lilin
• Teng Dongdong

Classifications

• G02B30/52

  the three-dimensional [3D] volume being constructed from a stack or sequence of two-dimensional [2D] planes, e.g. depth sampling systems · CPC title

• H04N13/398

  Synchronisation thereof; Control thereof · CPC title

• H04N13/363

  using image projection screens (volumetric display H04N13/388) · CPC title

• H04N13/339

  using spatial multiplexing (H04N13/337 takes precedence) · CPC title

• G02B30/31

  involving active parallax barriers (involving directional light or back-light sources G02B30/33) · CPC title