Naked-eye 3D display method and related device

Abstract

A method and related apparatus for autostereoscopic 3D display suitable for multiple viewing while reducing 3D crosstalk and switchable between 2D and 3D display is provided. The autostereoscopic 3D display device (300) includes an OLED backlight panel (301) and a display panel (302) switchable between 2D and 3D, arranged parallel to each other and spaced apart. The backlight panel (301) includes a controllable array of light-emitting units. The light-emitting units emit white light or no light. The display panel (302) includes an array of liquid crystal display units. The autostereoscopic 3D display device (300) is used to display a stereoscopic image. The stereoscopic image includes two or more views. When the autostereoscopic 3D display device (300) is switched to a 2D display mode, all of the light-emitting units on the backlight panel (301) emit light, ensuring that the light-receiving surface of the display panel (302) is uniformly illuminated. When the naked-eye 3D display device (300) is switched to a 3D display mode, the pixels of two or more views of a stereoscopic image are arranged in an interlaced manner on the display panel (302), and the light-emitting units of the backlight panel (301) are arranged in an alternating bright and dark manner.

Description

[Technical Field]

[0001] The present application relates to the technical field of 3D display, and in particular to a naked-eye 3D display method and related device. [Background technology]

[0002] Naked-eye 3D technology is made possible by the parallax of the human eye. In other words, when a person's left and right eyes observe the same object, differences in the image occur. The 3D content that people see is created when the image seen by the left eye and the image seen by the right eye are combined in the brain. This allows some processing to be done on the screen, mapping the parallax images to the left and right eyes respectively, and what people see becomes a 3D image.

[0003] In recent years, with the development of science and technology, televisions have come to include cathode ray tube televisions, liquid crystal displays (LCDs), and other types of displays, giving people more options for their television and display uses and applications. However, most displays currently on the market are in two-dimensional (2D) display mode. Therefore, the displayed image remains the same regardless of the viewing angle. So-called three-dimensional (3D) televisions employ 3D technologies such as stereoscopic capture, multi-view capture, and two-dimensional depth enhancement, allowing users to experience a sense of three-dimensional space. However, 3D televisions can only display 3D images, while most displays on the market can only display two-dimensional images. Summary of the Invention [Problem to be solved by the invention]

[0004] The present application aims to provide a naked-eye 3D display method and related device that can achieve a greater degree of low crosstalk and solve the problem of inconvenience in switching between 2D and 3D displays. [Means for solving the problem]

[0005] A first aspect of the present application provides a naked-eye 3D display method applicable to a naked-eye 3D display device. The naked-eye 3D display device includes a backlight panel and a display panel, which are switchable between 2D and 3D and arranged parallel to each other at a distance from each other. The backlight panel includes an array of controllable light-emitting units, each of which emits white light or no light. The display panel includes an array of display units. The naked-eye 3D display device is for displaying a stereoscopic image, the stereoscopic image including two or more views. When the naked-eye 3D display device is switched to a 2D display mode, all of the light-emitting units in the backlight panel emit light, ensuring that the light-entering surface of the display panel receives uniform light illumination. When the naked-eye 3D display device is switched to a 3D display mode, pixels of the two or more views of the stereoscopic image are arranged in a cross-shaped pattern on the display panel, and the light-emitting units in the backlight panel are arranged in alternating light and dark stripes.

[0006] A second aspect of the present invention provides a naked-eye 3D display device. The naked-eye 3D display device is a 2D / 3D switchable display device, and includes a backlight module and a display panel. The backlight module provides sufficient and uniformly distributed white light and includes a plurality of light source arrays arranged at intervals, each including a plurality of light-emitting units. When the naked-eye 3D display device is switched to a 2D display mode, all of the light-emitting units of the plurality of light source arrays emit light, ensuring that the light-entering surface of the display panel receives uniform light illumination. When the naked-eye 3D display device is switched to a 3D display mode, some of the light-emitting units of the light source array emit light, ensuring that the light-entering surface of the display panel receives light illumination with a light-dark interval. The left and right screen pixels of the display panel are arranged in a cross pattern according to a light-dark interval rule, so that each of the left and right screen pixels reaches the left and right eyes, respectively, creating a stereoscopic vision. [Effects of the Invention]

[0007] Compared to existing technologies, this application differs from the conventional tracking-based naked-eye 3D method in that it does not adjust the LCD pixel arrangement to fit the grating, but rather avoids the problem of LCD pixel particles splitting light simultaneously into left and right.Since the pixel arrangement of the display panel is fixed, by adjusting the arrangement of the light and dark stripes of the controllable light-emitting unit array of the backlight panel, it avoids the problem of conventional naked-eye 3D schemes that adapt to the light source by arranging pixels, reduces 3D crosstalk, enables multi-user viewing, and solves the problem of switching between 2D and 3D display. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a flowchart of a naked-eye 3D display method according to an embodiment of the present application. [Figure 2A] 1 is a schematic diagram of a naked-eye 3D display method according to an embodiment of the present application. [Figure 2B] 2 is a schematic diagram of one possible 3D display mode according to an embodiment of the present invention; FIG. [Figure 3] 1 is a structural schematic diagram of a possible naked-eye 3D display device according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0009] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be described in more detail below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are only used to illustrate the present application and are not intended to limit the present application.

[0010] 1 is a flowchart of a naked-eye 3D display method provided in an embodiment of the present application, which is applied to a naked-eye 3D display device for displaying stereoscopic images, and includes the following steps:

[0011] In step 101, when the naked-eye 3D display device is switched to a 2D display mode, all light-emitting units of the backlight panel of the naked-eye 3D display device are set to emit light, so that the light-receiving surface of the display panel of the naked-eye 3D display device is uniformly illuminated.

[0012] In step 102, when the naked-eye 3D display device is switched to a 3D display mode, the pixels of two or more views in the stereoscopic image are arranged in an interlaced manner on the display panel, and the light-emitting units of the backlight panel are arranged in alternating bright and dark stripes.

[0013] In an embodiment of the present application, the above-mentioned naked-eye 3D display device is switchable between 2D and 3D and includes the above-mentioned backlight panel and the above-mentioned display panel arranged parallel to each other at a distance. The backlight panel includes a plurality of controllable light-emitting unit arrays. The light-emitting units emit white light or no light. The display panel includes a plurality of liquid crystal display units. The stereoscopic image includes two or more views, where the vertical projection of each liquid crystal display unit corresponds to one or more of the above-mentioned controllable light-emitting unit arrays.

[0014] When the naked-eye 3D display device is switched to the 2D display mode, all the light-emitting units of the backlight panel are set to emit light, so that the light-receiving surface of the display panel is uniformly illuminated. That is, when the naked-eye 3D display device is operating in the 2D display mode, the 2D display mode is in the ON state. When the LED lamp bar corresponding to the light guide plate in the backlight panel is in the OFF state, the light source emitted from the backlight panel is a surface light source, so the optical characteristics of the surface light source after passing through the light guide plate still appear as surface light source characteristics.

[0015] Optionally, the light emitting units of the above light source array are OLED organic self-emitting diodes, and each light emitting unit is electrically controllable.

[0016] In practical applications, the arrangement of the bright and dark stripes of the light-emitting units of the backlight panel is adjusted based on the viewer's movements, so that each backlight beam passes through a different LCD unit and reaches the viewer's left and right eyes, respectively, creating a stereoscopic vision. Specifically, adjusting the arrangement of the bright and dark stripes of the backlight panel involves extending the line connecting the left and right pixel division lines of the display panel to the midpoints of the left and right eyes to the backlight panel, thereby obtaining the bright and dark division lines. Furthermore, the width of the bright stripes is reduced between 1:1 and 10:1 around the center point of the bright stripes, refreshing the arrangement of the bright and dark stripes of the backlight panel and increasing the brightness of the backlight inversely. The stripes are oriented perpendicular to the line connecting the viewer's eyes. Alternatively, left and right diagonal stripes may be arranged at angles to each other. Here, the left and right diagonal stripes form opposite angles to each other with respect to the line connecting the viewer's eyes.

[0017] In an embodiment of the present application, to allow multiple viewers to experience a 3D effect when they are moving simultaneously, the arrangement of the light and dark stripes of the light-emitting units of the backlight panel is adjusted, and the pixel interlacing arrangement of the multiple views of the stereoscopic image is also adjusted so that each backlight ray passes through a different LCD display unit and reaches each viewer's left and right eye, respectively, creating a stereoscopic vision. Specifically, adjusting the arrangement of the light and dark stripes of the light-emitting units of the backlight panel involves arranging multiple alternating light and dark stripe patterns on each backlight panel. Each stripe pattern corresponds to a pair of human eye positions and moves with the movement of the human eyes. The lines connecting the dividing lines between the left and right pixels of the display panel and the midpoints of each viewer's left and right eyes are extended to the backlight panel to form the light and dark dividing lines. Furthermore, the ratio of the width of the light stripe is reduced between 2:1 and 20:1, centered on the center point of the light stripe, to refresh the arrangement of the light and dark stripes on the backlight panel and increase the brightness of the backlight in inverse proportion. The direction of the stripes is perpendicular to the line connecting the observer's eyes.

[0018] Specifically, adjusting the arrangement of the light and dark stripes of the light-emitting units of the backlight panel when one or more observers move is described below. The display panel is a display panel, and the backlight panel is an OLED self-luminous panel. When the 3D display device displays a left-right stereoscopic image in 3D display mode, the pixel units of the display panel are equally divided into left-eye pixel sets and right-eye pixel sets. The left-eye pixel sets and right-eye pixel sets of the display panel are arranged in a cross-shaped arrangement and display left and right images, respectively. When an observer moves, a plurality of dividing center lines of the left and right pixels of the display panel are projected onto the plane of the backlight panel from the spatial position of the center of the observer's eye to form a cross-shaped image. Next, the width of the light stripes is reduced, and the brightness of the backlight is increased inversely. The light-emitting units of each backlight panel are adjusted to be light and dark in accordance with the cross-shaped image, thereby generating a stereoscopic vision in the observer's eyes.

[0019] A gap filling layer is further included between the light source array and the display panel. The thickness of the gap filling layer is M. Here, the formula for calculating the thickness of the gap filling layer is M=L*D / N. L represents the viewing distance, which is the distance from the human eye to the naked-eye 3D display device. D represents the size of the smallest indivisible unit of a pixel. N represents the pupil distance, which is the actual distance between the observer's eyes.

[0020] Optionally, the pixels of two or more views in the stereoscopic image are arranged in an interlaced manner on the display panel, and the interlaced arrangement may further include a checkerboard or honeycomb pattern. However, the embodiments of the present application are not specifically limited.

[0021] Optionally, the naked-eye 3D device in the embodiment of the present application further includes a color filter covered by the display panel to cause the RGB subpixels of the display panel to emit light of different colors. Figure 2A is a schematic diagram of the naked-eye 3D display method provided in the embodiment of the present application. The color filter is covered by the display panel. Light emitted from the light source array passes through the color filter and the display panel, illuminates the light-entering surface of the display panel, and reaches the viewer's eyes. When the naked-eye 3D device is in 2D display mode, the light-entering surface of the display panel is illuminated uniformly. When the naked-eye 3D device is in 3D display mode, pixels of two or more views of the stereoscopic image are arranged in a staggered manner on the display panel, and the light-emitting units of the backlight panel are arranged in an alternating light and dark configuration.

[0022] Further, please refer to Figure 2B, which is a schematic diagram of one possible 3D display mode provided in an embodiment of the present application, that is, the left eye of the observer sees the left-eye pixel, and the right eye of the observer sees the right-eye pixel, resulting in a stereoscopic vision due to the parallax between the eyes.

[0023] In this embodiment, the OLED white light diodes can be very small, much smaller than LCD pixel particles. The brightness and darkness of the OLED backlight panel can be adjusted to actively match the pixel arrangement of the LCD display panel. This differs from the traditional tracking-based naked-eye 3D method, which adjusts the pixel arrangement of the LCD to fit the grating. This avoids the problem of LCD pixel particles splitting into left and right simultaneously when dispersing light, solves the problem of inaccurate light splitting caused by the grating, and solves the problem of stray light caused by multiple reflections from the grating. It also significantly reduces crosstalk, avoids the occurrence of moiré patterns, and ensures accurate reproduction of 3D images. This allows for single and multiple viewing at different resolutions, and also solves the problem of switching between 2D and 3D display. Furthermore, due to the regularity of the OLED light and dark arrangement, multiple light-emitting units can be controlled in parallel, and the control for the OLED backlight is equivalent to a small-resolution (e.g., 128*256) black and white array drive, and does not require Full High Definition (FHD) or higher resolution pattern drive.

[0024] An embodiment of the present invention also provides a type of naked-eye 3D display device 300. Figure 3 is a structural schematic diagram of the naked-eye 3D display device 300 according to an embodiment of the present application. The naked-eye 3D display device 300 is a 2D / 3D switchable display device, and includes a backlight module 301 and a display panel 302. The backlight module 301 is for providing sufficient and uniformly distributed white light. The backlight module 301 includes a plurality of light source arrays arranged at intervals. Each light source array includes a plurality of light-emitting units.

[0025] When the naked-eye 3D display device 300 is switched to the 2D display mode, the light-emitting units of the plurality of light source arrays all emit light so that the light-receiving surface of the display panel 302 receives uniform light illumination.

[0026] When the naked-eye 3D display device 300 is switched to the 3D display mode, the partial light-emitting units of the light source array emit light so that the light-entering surface of the display panel 302 receives light of different brightness levels. The left and right screen pixels of the display panel 302 are arranged in a cross-shaped pattern according to the aforementioned brightness-dark interval rule, so that each left screen pixel and each right screen pixel reaches the left eye and the right eye, respectively, to produce a stereoscopic vision.

[0027] The naked-eye 3D display device 300 further includes a processor 303. When the 3D display device 300 switches to a 3D display mode to display a left-right stereoscopic image, the processor 303 divides the pixels of the display panel 302 equally into a left-eye pixel group and a right-eye pixel group. The pixel units of the left-eye pixel group and the right-eye pixel group are arranged in a cross-shaped arrangement and display the left and right images, respectively. The processor 303 determines the spatial positions of the viewer's left and right eyes, and projects a plurality of dividing midlines of the left and right pixels from the midpoints of the viewer's eyes onto the light source array plane to form a cross-shaped image. Each light-emitting unit of each light source array emits or does not emit light according to the cross-shaped image, forming a cross-shaped light source plane and providing the viewer with a stereoscopic vision.

[0028] Optionally, the naked-eye 3D display device 300 further includes color filters coated on the display panel 302 to cause the RGB sub-pixels of the display panel 302 to emit light of different colors.

[0029] Optionally, the light emitting units of said light source array are OLED organic self-light emitting diodes, and each of said light emitting units is electrically controllable.

[0030] As mentioned above, the above embodiments are only for illustrating the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in each of the above embodiments or replace some of the technical features with equivalents. These modifications or substitutions cannot deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of each embodiment of the present application.

Claims

1. A naked-eye 3D display method applied to a naked-eye 3D display device, comprising: The naked-eye 3D display device is switchable between 2D and 3D, and includes a backlight panel and a display panel arranged in parallel with a gap between them; the backlight panel includes an array of controllable light-emitting units, the light-emitting units emitting white light or not emitting light; the display panel includes an array of display units; the naked-eye 3D display device is for displaying a stereoscopic image, the stereoscopic image including two or more views; When the naked-eye 3D display device is switched to a 2D display mode, all of the light-emitting units provided on the backlight panel emit light, so that the light-receiving surface of the display panel is uniformly illuminated; The naked-eye 3D display method applied to the naked-eye 3D display device is characterized in that when the naked-eye 3D display device is switched to a 3D display mode, the pixels of two or more views in the stereoscopic image are arranged in an interlaced manner on the display panel, and the light-emitting units of the backlight panel are arranged in alternating bright and dark stripes.

2. the method further includes tracking the movement of the viewer and adjusting the arrangement of the bright and dark stripes of the light-emitting units of the backlight panel so that the light rays of each backlight pass through different display units to reach the left and right eyes of the viewer, respectively, thereby providing a stereoscopic visual sensation; Specifically, adjusting the arrangement of the light and dark stripes of the light-emitting units of the backlight panel involves extending the line connecting the dividing line between the left and right pixels of the display panel and the midpoint between the left and right eyes to the backlight panel, making it the light and dark dividing line; then, using the center point of the light stripe as the center, reducing the width of the light stripe to a ratio of 1:1 to 10:1; and then refreshing the arrangement of the light and dark stripes of the backlight panel and increasing the brightness of the backlight in inverse proportion; The direction of the stripes is perpendicular to the line connecting the observer's eyes, Alternatively, the naked eye 3D display method according to claim 1 further comprises left and right diagonal stripes that form angles with each other, and the angles formed by the left and right diagonal stripes with respect to a line connecting both eyes of the observer are opposite.

3. The method further includes, when multiple viewers move simultaneously, adjusting the arrangement of the bright and dark stripes of the light-emitting units of the backlight panel so that the light rays of each backlight pass through different display units and reach the left and right eyes of the viewers respectively, thereby providing a stereoscopic visual experience; The adjustment of the arrangement of the light stripes and the dark stripes of the light emitting units of the backlight panel specifically includes providing a plurality of alternating light and dark stripes on each backlight panel; Each of the stripes corresponds to a set of human eye positions and moves in accordance with the movement of the human eye; The line connecting the dividing line between the left and right pixels of the display panel and the midpoint of each viewer's left and right eyes is extended to the backlight panel to form a dividing line between light and dark, and then the ratio of the width of the light stripe is reduced to between 2:1 and 20:1 with the center point of the light stripe as the center, thereby refreshing the arrangement of the light and dark stripes of the backlight panel and increasing the brightness of the backlight in inverse proportion; 2. The naked-eye 3D display method according to claim 1, wherein the direction of the stripes is perpendicular to a line connecting both eyes of the viewer.

4. Adjusting the arrangement of the light and dark stripes of the backlight panel includes: the display panel is a liquid crystal display panel, and the backlight panel is an OLED self-luminous panel; When the 3D display device is in a 3D display mode for displaying a stereoscopic image in a left-right format, pixel units of the display panel are equally divided into a left-eye pixel set and a right-eye pixel set, the left and right pixel units of the display panel are arranged in a cross-shaped manner, and the left-eye pixel set and the right-eye pixel set display a left image and a right image, respectively; When the observer moves, a plurality of dividing midlines of the left and right pixels of the display panel are projected onto the plane of the backlight panel from the spatial position of the midpoint between the observer's eyes to form an intersecting image, thereby reducing the width of the bright stripes and increasing the brightness of the backlight in inverse proportion; The naked eye 3D display method according to claim 2 or 3, characterized in that each light-emitting unit of each backlight panel is adjusted to be arranged in light and dark according to the interlaced arranged images, thereby generating a stereoscopic vision in the observer's eyes.

5. a gap filling layer is further provided between the light source array and the display panel, and the thickness of the gap filling layer is M; 2. The naked-eye 3D display method of claim 1, wherein M=L*D / N, where L is used to represent the viewing distance, which is the distance from the human eye to the naked-eye 3D display device, D is the smallest size of a pixel-indivisible subunit, and N is used to represent the pupil distance, which is the true distance between the observer's eyes.

6. 2. The naked-eye 3D display method of claim 1, wherein pixels of two or more views in the stereoscopic image are arranged in a staggered manner on the display panel, and the staggered arrangement further includes a checkerboard or honeycomb pattern.

7. A 2D / 3D switchable naked-eye 3D display device including a backlight module and a display panel, The backlight module provides sufficient and uniformly distributed white light and includes a plurality of light source arrays arranged at intervals, each light source array including a plurality of light emitting units; When the naked-eye 3D display device is switched to a 2D display mode, all of the light-emitting units of the plurality of light source arrays emit light, so that the light-receiving surface of the display panel is uniformly illuminated; When the naked-eye 3D display device is switched to a 3D display mode, the partial light-emitting units of the light source array emit light so that the light-entering surface of the display panel is illuminated with light having a light-dark interval; The left and right screen pixels of the display panel are arranged in a cross pattern according to a light-dark interval rule, so that each of the left and right screen pixels reaches the left eye and the right eye, respectively, to produce a stereoscopic vision.

8. the naked-eye 3D display device further comprises a processor; When the 3D display device switches to a 3D display mode to display left and right stereoscopic images, the processor divides the pixels of the display panel equally into a left-eye pixel group and a right-eye pixel group, and pixel units of the left-eye pixel group and the right-eye pixel group are arranged in an interlaced manner to respectively display left images and right images; The naked eye 3D display device of claim 7, characterized in that the processor determines the spatial positions of the observer's left and right eyes, and projects a plurality of dividing midlines of the left and right pixels from the midpoint positions of the observer's eyes onto the plane of the light source array to form an interlaced image, and each light-emitting unit of each light source array emits or does not emit light according to the interlaced image to form an interlaced light source surface, thereby generating a stereoscopic vision in the observer's eyes.

9. The naked-eye 3D display device of claim 7 , further comprising an eye tracking unit for calculating the spatial position of the human eye and the viewing distance.

10. 8. The naked-eye 3D display device of claim 7, further comprising a color filter covering the display panel such that RGB sub-pixels of the display panel emit light of different colors.

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