公开(公告)号：US20220311993A1

公开(公告)日：2022-09-29

申请号：US17832717

申请日：2022-06-06

Applicant: SUN YAT-SEN UNIVERSITY

Inventor： Lilin LIU ,  Dongdong TENG

IPC: H04N13/344 ,  G02B30/52 ,  H04N13/339 ,  H04N13/398 ,  H04N13/363

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.

公开(公告)号：US20170310954A1

公开(公告)日：2017-10-26

申请号：US15481467

申请日：2017-04-07

Applicant: SUN YAT-SEN UNIVERSITY

Inventor： Lilin LIU ,  Dongdong TENG

IPC: H04N13/04

CPC classification number: H04N13/341 ,  H04N13/144 ,  H04N13/324 ,  H04N13/337 ,  H04N13/344 ,  H04N13/398 ,  H04N2213/008

Abstract: The invention features techniques and systems for presenting two or more perspective views to each eye of the viewer, through division multiplexing of the viewer's entrance-pupil. The system is constituted by a selective-aperture array with each aperture being transparent only to light beams with some special characteristics, at least one display screen for optical information presentation, and other optional elements. The optical message on at least one display screen propagates to the selective-aperture array directly, or be directed to the selective-aperture array or the eye of the viewer by other optional elements. Through selective filtering by the apertures with temporal filtering characteristics or exclusive filtering characteristics, multiple perspective views get presented to an eye of the viewer through the selective-aperture array. Light rays different perspective views superimpose into real spatial light spots that the eye can focus on naturally, resulting in overcoming of the accommodation-convergence conflict.

公开(公告)号：US20230061336A1

公开(公告)日：2023-03-02

申请号：US17460343

申请日：2021-08-30

Applicant: SUN YAT-SEN UNIVERSITY

Inventor： Dongdong TENG ,  Lilin LIU

IPC: G02B27/01

Abstract: The invention discloses an optical-waveguide display module with multiple light sources, including a light-source array of timing-orthogonal-characteristic, a relay device, a display device of orthogonal-characteristic, an optical waveguide device, a converging device, a control device, and other components. The light-source array of timing-orthogonal-characteristic includes more than one orthogonal-characteristic light sources. All orthogonal-characteristic light sources are switched on and off in each time cycle sequentially, with only one orthogonal-characteristic light source being switched on at a time-point of each time cycle. By designing the spatial distribution of converging spots of lights from different orthogonal-characteristic light sources, one two-dimensional image is projected into the pupil of the viewer in each time cycle, which realizes VAC-free three-dimensional display based on Maxwellian view technology or More-than-one-view-one-pupil technology.

公开(公告)号：US20210314553A1

公开(公告)日：2021-10-07

申请号：US17226093

申请日：2021-04-09

Applicant: SUN YAT-SEN UNIVERSITY

Inventor： Dongdong TENG ,  Lilin LIU

IPC: H04N13/32 ,  G02B30/24 ,  G02B30/25 ,  H04N13/324 ,  H04N13/398 ,  H04N13/385 ,  H04N13/383

Abstract: The invention discloses a three-dimensional display method based on spatial superposition of sub-pixels' emitted beams. Taking sub-pixels of a display device as the basic display units, sub-pixels that emitting beams of the same color are taken as a sub-pixel group or divided into several sub-pixel groups. Through a beam control device, the sub-pixel groups project more than one image of the target object to a same pupil of the viewer. Passing through a displayed spatial point, more than one beam from sub-pixels of different colors superimpose into a color spatial light spot, where the mosaic of sub-pixels of different colors is employed to present surface-distributed color pixel. The beam control device guides the beam from each sub-pixel to the viewing zone corresponding to a sub-pixel group that contains the sub-pixel, along a special direction and with a constrained divergence angle.

公开(公告)号：US20220174263A1

公开(公告)日：2022-06-02

申请号：US17107964

申请日：2020-12-01

Applicant: SUN YAT-SEN UNIVERSITY

Inventor： Dongdong TENG ,  Lilin LIU

IPC: H04N13/32 ,  H04N13/322 ,  H04N13/398

Abstract: The invention discloses a three-dimensional display method for large field of view and small viewing-zone interval. A display screen constructed by sub-screens with adjacent ones emitting lights of different exclusive optical characteristics is employed, and sequentially-switching aperture-arrays are placed close to a pupil of the viewer. M apertures of an aperture array correspond to the M sub-screens by a one-to-one manner in turn, to make the transmittance of each aperture to the light from the corresponding sub-screen be greater than that to the lights from the adjacent non-corresponding sub-screens by a ratio larger than 9. The corresponding apertures of a sub-screen in different aperture-arrays are arranged with an interval not larger than the diameter of the pupil. At a time-point, only one aperture-array gets open, and all aperture-arrays get open sequentially at different time-points of a time-period. At each time-point, each sub-screen presents optical information to the corresponding turned-on aperture synchronously. When the time-period is small enough, a three-dimensional display with large field of view and small viewing-zone interval gets implemented.

公开(公告)号：US20210223462A1

公开(公告)日：2021-07-22

申请号：US17149765

申请日：2021-01-15

Applicant: SUN YAT-SEN UNIVERSITY

Inventor： Lilin LIU ,  Dongdong TENG

IPC: F21V8/00 ,  G02B27/10 ,  G02B27/01

Abstract: The invention discloses a three-dimensional display module using optical wave-guide for providing directional backlights. This display module includes a wave-guide backlight unit with time-sequential directional light sources, a display device, a wavefront modulation device or a light splitting device, and other components. The wave-guide backlight unit with time-sequential directional light sources includes a sequential-switching light-source array, a relay device, and an optical wave-guide device. Each light source of the sequential-switching light-source array provides backlight of corresponding vector characteristics to the display device, making optical message displayed by the display device being guided to the corresponding viewing zone/viewing zones. Through the technology routes of multiple-view-for-one-pupil or/and Maxwellian view, the three-dimensional display module implements displays free from the vergence-accommodation conflict. The introduction of the optical wave-guide device results in a thin structure, and the disclosed display module can be applied to various display terminals, such as mobile phones, iPads, head-mounted VR/AR, etc.

公开(公告)号：US20240295747A1

公开(公告)日：2024-09-05

申请号：US18592550

申请日：2024-03-01

Applicant: SUN YAT-SEN UNIVERSITY

Inventor： Dongdong TENG ,  Lilin LIU

IPC: G02B30/33

CPC classification number: G02B30/33

Abstract: The present invention discloses a display module based on divergent beams with an asymmetrical divergence angle, which includes a light engine, a divergence-angle modulation element, a combiner, and a controller. The beams emitted from each projection point of the light engine are modulated, by the divergence-angle modulation element, into a bunch of beams with an asymmetrical divergence angle. Such a bunch of beams cover a rather large region on the combiner, by oblique incidence along one direction at a small divergence angle and by incidence along another direction at a large divergence angle. Then, the combiner converges incident beams from different projection points to corresponding viewing zones respectively, for a Maxwellian view 3D display or a Super multi-view 3D display.

公开(公告)号：US20220229308A1

公开(公告)日：2022-07-21

申请号：US17367445

申请日：2021-07-05

Applicant: SUN YAT-SEN UNIVERSITY

Inventor： Dongdong TENG ,  Lilin LIU

IPC: G02B27/12 ,  G02B30/30 ,  H04N13/363 ,  G02B27/18 ,  H04N13/10

Abstract: The invention discloses a display module with the divergence angle of an outgoing beam constrained again by the corresponding deflection aperture, which includes a multi-view display structure, a deflection-aperture array and a control device. The multi-view display structure includes a display screen, a light-splitting device, and a backlight-source assembly for providing backlights when a backlit-type display screen is adopted. The light-splitting device guides light beams from each group of pixels or sub-pixels to the corresponding viewing zone. A deflection aperture with a small size is designed for constraining the divergence angle of deflected light beams. Multiple deflection apertures play the function of enlarging the field of view, which is very limited when only a single deflection aperture exists. With orthogonal characteristics being assigned to deflection apertures for suppressing noise and/or for projecting more views, three-dimensional display with natural focus will get implemented with large field of view and low noises.

公开(公告)号：US20160165223A1

公开(公告)日：2016-06-09

申请号：US14825854

申请日：2015-08-13

Applicant: Sun Yat-sen University

Inventor： Lilin LIU ,  Dongdong TENG

IPC: H04N13/04

Abstract: The invention features a multi-view display system based on planar- or circular-aligned light-restricted projection units. A light-restricted projection unit is constituted by a display panel, a directional imaging structure transmitting optical messages from the display panel along a specific direction, and baffles encasing the display panel/directional imaging structure pair for light blocking. During operation, all the light-restricted projection units project images to a common display zone. Each light-restricted projection unit generates two kinds of zones: VZ where light rays from all pixels of the display panel pass and PVZ where light rays from partial pixels of the display panel pass. With the light-restricted projection units being aligned closely, PVZs from different light-restricted projection units completely or partially overlap into a fusing zone (FZ). For each point in the FZ, light rays from pixels belonging to segments of different display panels pass. The spatial percents of different segments occupying their display panels change with the point location, resulting in changing views presented to the pupil moving from one VZ (or image area of one VZ) to its adjacent VZ (or image area of the adjacent VZ). With the help of these keeping-changed views, continuous motion parallax gets implemented. Furthermore, through introducing sequentially gated gating-apertures, perspective views corresponding to more viewpoints can be presented by the display system based on persistence of vision for better three-dimensional effects.

Abstract translation: 本发明的特征在于基于平面或圆形对准的光限制投影单元的多视点显示系统。 光限制投影单元由显示面板，沿着特定方向从显示面板发送光学信息的定向成像结构以及封装用于遮光的显示面板/方向成像结构对的挡板构成。 在操作过程中，所有光限制投影单元将图像投影到一个共同的显示区域。 每个受光限制的投影单元产生两个区域：VZ，其中来自显示面板的所有像素的光线通过，以及来自显示面板的部分像素的光线通过的PVZ。 在光限制投影单元紧密对准的情况下，来自不同光限制投影单元的PVZ完全或部分地重叠到定影区（FZ）中。 对于FZ中的每个点，来自属于不同显示面板的段的像素的光线通过。 占据其显示面板的不同段的空间百分比随着点位置而变化，导致呈现给从一个VZ（或一个VZ的图像区域）移动到其相邻VZ（或相邻VZ的图像区域）的瞳孔的视图。 在这些保持改变的观点的帮助下，实现连续运动视差。 此外，通过引入顺序的门控门控，可以通过显示系统基于视觉的持久性来呈现对应于更多视点的透视图，以获得更好的三维效果。

公开(公告)号：US20250142043A1

公开(公告)日：2025-05-01

申请号：US18931088

申请日：2024-10-30

Applicant: SUN YAT-SEN UNIVERSITY

Inventor： Lilin LIU ,  Dongdong TENG

IPC: H04N13/32 ,  G02B27/00 ,  G02B27/01 ,  G02B30/29 ,  G02B30/33 ,  H04N13/324 ,  H04N13/383 ,  H04N13/385 ,  H04N13/398

Abstract: Present disclosure discloses a dense-viewpoint three-dimensional display system and display method thereof, which uses the smallest surface structure that can emit light independently as a display cell. A light-guiding element of an eyebox-generating device guides beams from corresponding display cells to discretely arranged eyeboxes with dense viewpoints. In present disclosure, a display cell projects a beam along a special projecting path to the corresponding viewpoint. Relative to traditional 3D display which takes a pixel as a display unit and lets all sub-pixels of a pixel correspond to a common projecting path, present disclosure can effectively increase the reachable viewpoint number. Furthermore, configuring discretely distributed eyeboxes to keep tracking a viewer's pupils also can reduce necessary viewpoint number for implementing a VAC-free 3D display.