CN111580272A - Near-to-eye light field display method and device - Google Patents

Near-to-eye light field display method and device Download PDF

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Publication number
CN111580272A
CN111580272A CN201910118683.3A CN201910118683A CN111580272A CN 111580272 A CN111580272 A CN 111580272A CN 201910118683 A CN201910118683 A CN 201910118683A CN 111580272 A CN111580272 A CN 111580272A
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display
light field
eye light
depth
display device
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CN201910118683.3A
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吴考寅
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features

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Abstract

A near-eye light field display apparatus includes a zoom system and a display device. The zoom system is used for changing the position of a focus to enable the display device to generate position change in the depth of field range before and after the focus. On the basis of the near-eye light field display device, the invention provides a near-eye light field display method, which comprises the following steps of (1) dividing an image to be displayed into a plurality of layers with different depths for scanning and displaying one by one; (2) and regulating and controlling the different depths of the corresponding layers of the display device in the depth of field ranges before and after the focus through a zoom system.

Description

Near-to-eye light field display method and device
Technical Field
The invention relates to the technical field of three-dimensional display, in particular to a device and a method based on near-to-eye light field display.
Background
We live in a three-dimensional world, however, conventional display technology only provides a two-dimensional display lacking depth information. The two-dimensional display greatly limits the amount of information that people can learn about the colorful world. The rapid development of electronic, optical, and optoelectronic technologies has facilitated the development of three-dimensional display technologies. The three-dimensional display technology provides depth information of a displayed object, and meets the requirements of modern people on information acquisition. Three-dimensional technology has received a great deal of attention in academia and business.
The existing three-dimensional display technology mainly comprises parallax three-dimensional display, volume three-dimensional display, holographic three-dimensional display, integrated imaging three-dimensional display, light field three-dimensional display and the like. Most three-dimensional display technologies have the problem of convergence, which easily causes fatigue and even dizziness of viewers.
The light field near-eye display (head-mounted display) technology is the simplest method for realizing three-dimensional display. The concept of light field reconstruction is introduced into near-eye display, at least 2 rays enter the pupil for any three-dimensional reconstruction point, so that the human eyes can conveniently and freely focus images at different depths, the convergence conflict of focusing is eliminated, and the watching is closer to reality and nature. Gordon Wetzstein et al, Hironobu Gotoda and MIT, performs non-negative matrix decomposition on a four-dimensional light field based on multilayer liquid crystals according to a computer tomography technology to obtain a multilayer attenuation pattern, realizes three-dimensional display based on the multilayer liquid crystals, and can realize high-resolution light field display in a small viewing angle. Compared with the stacking of multilayer liquid crystal, the micro-lens array technology decomposes an image into dozens of groups of different viewing angle arrays, and then restores and displays the picture through the combination of the micro-lens arrays, wherein in one picture, contents at different distances can be generated into corresponding depth-of-field images by corresponding lenses, and when a user watches different 'points' in the picture, the perceived 'distances' are different, so that the use is closer to the real viewing experience.
Both of these current technologies have their own disadvantages, such as stacking of multiple layers of liquid crystal, which requires more liquid crystal to be stacked to give more depth information, which undoubtedly increases the volume and weight of the near-eye display device, and reduces the wearing comfort.
The microlens array technology displays pictures in a mode of N micro display screens and a microlens array, certain attenuation is caused to the screen resolution, and the pictures are very fuzzy when the screen resolution is insufficient. To more closely approximate the real-world viewing experience, the microlens array density is large enough to meet the high resolution, which is a significant difficulty in manufacturing.
Disclosure of Invention
The invention aims to overcome the problem of low near-eye display resolution, and provides a near-eye light field display device and a near-eye light field display method for improving the quality and resolution of a near-eye light field display image; the specific technical scheme of the invention is as follows:
a near-eye light field display apparatus includes a zoom system and a display device. The zoom system is used for changing the position of a focus to enable the display device to generate position change in the depth of field range before and after the focus.
On the basis of the near-eye light field display device, the invention provides a near-eye light field display method, which comprises the following steps:
(1) dividing an image to be displayed into a plurality of layers with different depths for scanning and displaying one by one;
(2) and regulating and controlling the different depths of the corresponding layers of the display device in the depth of field ranges before and after the focus through a zoom system.
The invention has the following beneficial effects.
Compared with the prior art, the main advantages of the invention are as follows:
1. the invention realizes the image display in the field depth range under the condition of not increasing the system pixel units, thereby improving the resolution of light field display.
2. The invention improves the resolution of light field display without increasing the system pixel unit, thereby reducing the volume and weight of the near-eye display device.
Drawings
Fig. 1 to 12 are schematic structural views of a near-eye light field display device.
Detailed Description
The invention is further illustrated with reference to the following figures and examples, which should not be construed as limiting the scope of the invention.
Example 1
Fig. 1 is a near-eye light field display device, which comprises a fresnel lens 1, an armature 4, a return spring 6, an electromagnet 6, a liquid crystal display 2 and a backlight device 5, which are arranged in sequence along the front of an eyeball 12; taking three image layers with the display distances of far, middle and near in sequence as an example, when a liquid crystal display scans and displays a long-distance image layer, the liquid crystal display is positioned at a far point of depth of field behind a focus, when the liquid crystal display scans and displays a middle-distance image layer, the electromagnet 6 controls the Fresnel lens 1 to move so that the liquid crystal display 2 is positioned at the focus 10, when the liquid crystal display 2 scans and displays a short-distance image layer, the electromagnet 6 continuously controls the Fresnel lens 1 to move so that the liquid crystal display 2 is positioned at a near point of depth of field in front of the focus 10, and when a plurality of image layers with different depths need to be displayed, the liquid crystal display 2 is regulated and controlled to correspond to different depths of the image layers.
Example 2
Fig. 2 is a near-eye light field display device, which comprises a fresnel lens 1, an armature 4, a return spring 6, an electromagnet 3, a liquid crystal display 2 and a backlight device 5, which are arranged in sequence along the front of an eyeball 12; taking three image layers with the display distances of far, middle and near in sequence as an example, when the liquid crystal display screen 2 scans and displays the long-distance image layer, the liquid crystal display screen 2 is positioned at a far point of depth of field behind the focus 10, when the liquid crystal display screen 2 scans and displays the middle-distance image layer, the liquid crystal display screen 2 is controlled to move to the focus 10 through the electromagnet 3, and when the liquid crystal display screen 2 scans and displays the short-distance image layer, the liquid crystal display screen 2 is continuously controlled to move to a near point of depth of field in front of the focus 10 through the electromagnet 3. When a plurality of layers with different depths are required to be displayed, the liquid crystal display screen 2 is regulated and controlled to correspond to the different depths of the layers within the depth of field range in front of and behind the focus 10.
Example 3
Fig. 3 shows a near-eye light field display device, which comprises a fresnel lens 1, an armature 4, a return spring 6, an electromagnet 3, and an OLED display 7, which are sequentially disposed along the front of an eyeball 12; taking three layers with far, middle and near display distances in sequence as an example, when the OLED display screen 7 scans and displays a long-distance layer, the OLED display screen 7 is located at a far point of depth of field behind a focal point 10, when the OLED display screen 7 scans and displays a middle-distance layer, the movement of the Fresnel lens 1 is controlled by the electromagnet 3 to enable the OLED display screen 7 to be located at the far point of depth of field before the focal point 10, when the OLED display screen 7 scans and displays a short-distance layer, the movement of the Fresnel lens 1 is continuously controlled by the electromagnet 3 to enable the OLED display screen 7 to be located at a near point of depth of field before the focal point 10, and when a plurality of layers with different depths are required to be displayed, the different depths of the layers corresponding to the layers in the depth of.
Example 4
Fig. 4 shows a near-eye light field display device, which comprises a fresnel lens 1, an armature 4, a return spring 6, an electromagnet 3, and an OLED display 7, which are sequentially disposed along the front of an eyeball 12; taking three layers with the display distances of far, middle and near in sequence as an example, when the OLED display screen 7 scans and displays the long-distance layer, the OLED display screen 7 is located at the far point of the depth of field behind the focus 10, when the OLED display screen 7 scans and displays the middle-distance layer, the OLED display screen 7 is controlled to move to the focus through the electromagnet 3, and when the OLED display screen 7 scans and displays the short-distance layer, the OLED display screen 7 is continuously controlled to move to the near point of the depth of field before the focus 10 through the electromagnet 3. When a plurality of layers with different depths are required to be displayed, the OLED display screen 7 is regulated and controlled to correspond to the different depths of the layers within the depth of field range in front of and behind the focus 10.
Example 5
Fig. 5 shows a near-eye light field display device, which comprises a lens 9, an armature 4, a return spring 6, an electromagnet 3, a dmd chip 8, a spot light 14 and a beam splitter 13; taking three layers with sequentially long, medium and short display distances as an example, when the DMD chip 8 scans and displays a long-distance layer, the DMD chip 8 is located at a far point of depth of field behind the focal point 10, when the DMD chip 8 is to scan and display a medium-distance layer, the electromagnet 3 controls the lens 9 to move so that the DMD chip 8 is located at the focal point, and when the DMD chip 8 scans and displays a short-distance layer, the electromagnet 3 continuously controls the lens 9 to move so that the DMD chip 8 is located at a near point of depth of field in front of the focal point 10. When a plurality of layers with different depths are required to be displayed, the depth of the layers is adjusted and controlled within the depth of field range of the front and the back of the focus 10 by the DMD chip 8. The visual information displayed by the layers is fused with the light of the real scene 11 through the beam splitter so as to be thrown into the human eyeball 12.
Example 6
Fig. 6 shows a near-eye light field display device, which includes a lens 9, an armature 4, a return spring 6, an electromagnet 3, an lcos chip 17, a spot light 14, and a beam splitter 13; taking three layers with the display distances of far, middle and near in sequence as an example, when the lcos chip 17 scans and displays the long-distance layer, the lcos chip 17 is located at the far point of the depth of field behind the focal point 10, when the lcos chip 17 scans and displays the middle-distance layer, the lens is controlled by the electromagnet to move, so that the lcos chip 17 is located at the focal point 10, and when the lcos chip 17 scans and displays the short-distance layer, the lens 9 is continuously controlled by the electromagnet 3 to move, so that the lcos chip 17 is located at the near point of the depth of field in front of the focal point. When a plurality of layers with different depths are required to be displayed, the lcos chip 17 is regulated and controlled to correspond to the different depths of the layers in the depth of field range in front of and behind the focus 10. The visual information displayed by the layers is fused with the light of the real scene 11 through the beam splitter 13 to be projected into the human eyeball 12 as the visual information of the augmented reality.
Example 7
Fig. 7 shows a near-to-eye light field display device, which includes a lens 9, an armature 4, a return spring 6, an electromagnet 3, a Micro LED display screen 18, and a beam splitter 13; taking three layers with sequential far, middle and near display distances as an example, when the Micro LED display screen 18 scans and displays a long-distance layer, the Micro LED display screen 18 is located at a far point of depth of field behind the focal point 10, when the Micro LED display screen 18 scans and displays a middle-distance layer, the electromagnet 3 controls the lens 9 to move so that the Micro LED display screen 14 is located at the focal point 10, and when the Micro LED display screen 18 scans and displays a short-distance layer, the electromagnet 3 continuously controls the lens 9 to move so that the Micro LED display screen 18 is located at a near point of depth of field in front of the focal point. When a plurality of layers with different depths need to be displayed, the Micro LED display screen 18 is regulated and controlled to correspond to the different depths of the layers within the depth of field range in front of and behind the focus 10. The visual information displayed by the layers is fused with the light of the real scene 11 through the beam splitter 13 to be projected into the human eyeball 12 as the visual information of the augmented reality.
Example 8
Fig. 8 shows a near-to-eye light field display device, which includes a lens 9, an armature 4, a return spring 6, an electromagnet 3, an OLED display 7, and a beam splitter 13; taking three layers with a far display distance, a medium display distance and a near display distance in sequence as an example, when the OLED display 7 scans and displays a long-distance layer, the OLED display 7 is located at a far depth point behind a focus 10, when the OLED display 7 scans and displays a medium-distance layer, the electromagnet 3 controls the lens 9 to move so that the OLED display 7 is located at the focus, and when the OLED display 7 scans and displays a short-distance layer, the electromagnet 3 continuously controls the lens 9 to move so that the OLED display 7 is located at a near depth point in front of the focus 10. When a plurality of layers with different depths are required to be displayed, the OLED display screen 7 is regulated and controlled to correspond to the different depths of the layers within the depth of field range in front of and behind the focus 10. The visual information displayed by the layers is fused with the light of the real scene 11 through the beam splitter 13 to be projected into the human eyeball 12 as the visual information of the augmented reality.
Example 9
Fig. 9 shows a near-to-eye light field display device, which includes a lens 9, an armature 4, a return spring 6, an electromagnet 3, a liquid crystal display 2, a backlight device 5, and a beam splitter 13; taking three image layers with the display distances of far, middle and near in sequence as an example, when the liquid crystal display screen 2 scans and displays the long-distance image layer, the liquid crystal display screen 2 is positioned at a far point of depth of field behind the focus 10, when the liquid crystal display screen 2 scans and displays the middle-distance image layer, the electromagnet 3 controls the lens 9 to move so that the liquid crystal display screen 2 is positioned at the focus 10, and when the liquid crystal display screen 2 scans and displays the short-distance image layer, the electromagnet 3 continuously controls the lens 9 to move so that the liquid crystal display screen is positioned at a near point of depth of field in front of the. When a plurality of layers with different depths are required to be displayed, the liquid crystal display screen 2 is regulated and controlled to correspond to the different depths of the layers within the depth of field range in front of and behind the focus 10. The visual information displayed by the layers is fused with the light of the real scene 11 through the beam splitter 13 to be projected into the human eyeball 12 as the visual information of the augmented reality.
Example 10
A near-eye light field display apparatus as shown in fig. 10, having a liquid crystal-based variable focus lens 15, a liquid crystal display screen 2, a backlight 5 disposed in this order along the front of an eyeball 12; taking three layers with the display distances of far, middle and near in sequence as an example, when the liquid crystal display screen 2 scans and displays the long-distance layer, the liquid crystal display screen 2 is positioned at a far point of depth of field behind the focus 10, and when the liquid crystal display screen 2 scans and displays the middle-distance layer, the liquid crystal display screen is positioned at the focus 10 by controlling the focus 10 to move through the variable focus lens 15 based on liquid crystal; when the liquid crystal display 2 scans and displays the short-distance layer, the liquid crystal display 2 is positioned at the near point of depth of field in front of the focal point 10 by controlling the focal point 10 to move through the liquid crystal-based variable focus lens 15. When a plurality of layers with different depths are required to be displayed, the liquid crystal display screen 2 is regulated and controlled to correspond to the different depths of the layers in the depth of field range before and after the focus.
Example 11
Fig. 11 shows a near-eye light field display device, which has a liquid-filled zoom lens 16 and an OLED display 7 sequentially disposed along the front of an eyeball 12; taking three layers with a far, a middle and a near display distance in sequence as an example, when the OLED display screen 7 scans and displays a long-distance layer, the OLED display screen 7 is located at a far depth point behind the focal point 10, when the OLED display screen 7 scans and displays a middle-distance layer, the liquid-filled zoom lens 16 controls the focal point 10 to move so that the OLED display screen 7 is located at the focal point 10, and when the OLED display screen 7 scans and displays a short-distance layer, the liquid-filled zoom lens 16 controls the focal point 10 to move so that the OLED display screen 7 is located at a near depth point in front of the focal point. When a plurality of layers with different depths are required to be displayed, the OLED display screen 7 is regulated and controlled to correspond to the different depths of the layers within the depth of field range in front of and behind the focus 10.
Example 12
A near-eye light field display device as shown in fig. 12, which comprises a liquid crystal based variable focus lens 15, an OLED display screen 7, and a beam splitter 13; taking three layers with a far display distance, a medium display distance and a short display distance in sequence as an example, when the OLED display screen 7 scans and displays a long-distance layer, the OLED display screen 7 is located at a far depth point behind the focal point 10, when the OLED display screen 7 scans and displays a medium-distance layer, the liquid crystal-based variable focusing lens 15 controls the focal point 10 to move so that the OLED display screen 7 is located at the focal point 10, and when the OLED display screen 7 scans and displays a short-distance layer, the liquid crystal-based variable focusing lens 15 controls the focal point 10 to move so that the OLED display screen 7 is located at a near depth point in front of the focal point 10. When a plurality of layers with different depths are required to be displayed, the OLED display screen 7 is regulated and controlled to correspond to the different depths of the layers within the depth of field range in front of and behind the focus 10. The visual information displayed by the layers is fused with the light of the real scene 11 through the beam splitter 13 to be projected into the human eyeball 12 as the visual information of the augmented reality.
While the invention has been further described herein by way of illustration and example, it is to be understood that the invention is not limited to the embodiments and examples described above, and that the foregoing description is intended to be illustrative and not limiting, and that various changes and modifications may be made by one skilled in the art without departing from the scope and spirit of the invention as defined by the appended claims.

Claims (10)

1. A method of near-eye light field display, comprising:
dividing an image to be displayed into a plurality of layers with different depths for scanning and displaying one by one; and regulating and controlling the depth of field of the display device in the range of depth of field before and after the focus by the zoom system corresponding to the different depths of the layer.
2. The device for displaying the near-to-eye light field is characterized by comprising a zoom system and a display device, wherein the zoom system is used for regulating and controlling the display device to correspond to different depths of a displayed layer in a depth of field range before and after a focus.
3. The method of near-eye light field display of claim 1, wherein the zoom system comprises a zoom lens.
4. The near-eye light field display apparatus of claim 2 wherein the display device comprises a flat panel display.
5. The method for near-eye light field display of claim 1, wherein the zoom system comprises a liquid-filled zoom lens.
6. The near-to-eye light field display device of claim 2, wherein the display device comprises a liquid crystal display.
7. The method of near-to-eye light field display of claim 1, wherein the zoom system comprises a liquid crystal-based variable focus lens.
8. The near-to-eye light field display apparatus of claim 2, wherein the display device comprises an OLED display screen.
9. The method for near-to-eye light field display of claim 1, wherein the zoom system comprises a lens, an electromagnet, and a return spring.
10. The near-eye light field display device according to claim 2, wherein the display device comprises a DMD display chip and an LCOS display chip.
CN201910118683.3A 2019-02-17 2019-02-17 Near-to-eye light field display method and device Pending CN111580272A (en)

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Application Number Priority Date Filing Date Title
CN201910118683.3A CN111580272A (en) 2019-02-17 2019-02-17 Near-to-eye light field display method and device

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CN111580272A true CN111580272A (en) 2020-08-25

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