CN114326142A - Full-parallax naked-eye 3D display system and method based on human eye tracking - Google Patents
Full-parallax naked-eye 3D display system and method based on human eye tracking Download PDFInfo
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Abstract
The invention relates to the technical field of 3D display, and discloses a full-parallax naked eye 3D display method based on human eye tracking, which is characterized by comprising the following steps of: s1, sequentially arranging a display module, a lens array and a backlight module from back to front, wherein the backlight module comprises a plurality of backlight units, each backlight unit comprises a plurality of lamp beads, and the distances between the lamp beads and the lens array are unequal; s2, determining the space position of the pupil of the human eye; s3, controlling the display module to display pictures corresponding to the left eye and the right eye respectively according to the space positions of the pupils of the human eyes, and simultaneously controlling the backlight module to synchronously light the corresponding lamp groups; when the lamp group is lighted, the corresponding lamp beads are lighted according to the rule that the light spots falling into the left eye and the right eye do not overlap. The object distance of each lamp bead and the lens is different, so that the image distance of each lamp bead through the lens is different, the depth position of the visual area can be adjusted, the best viewing experience is guaranteed, and the depth range of the display module is enlarged.
Description
Technical Field
The invention relates to the technical field of 3D display, in particular to a full-parallax naked eye 3D display system and method based on human eye tracking.
Background
Naked-eye 3D (english: autoscopy) is a generic name of technologies that realize stereoscopic vision without using external tools such as polarized glasses. The naked eye 3D display technology is widely applied to the fields of education, commerce, medical treatment and the like. At present, the naked eye 3D technology mainly uses grating and cylindrical lens technology in the market, but provides better 3D visual experience for human, and meanwhile, some defects still exist, such as resolution loss, higher crosstalk, smaller screen output and the like, and the main reason is that the light source in the technology is also an image source. With the popularization of 4K and 8K liquid crystal panels, the problem of resolution loss can meet the requirements of human beings, however, the calibration of the grating or the cylindrical lens and the LCD panel at the pixel level is still difficult to produce and popularize in a large scale, and the problem of high crosstalk is not solved. The directional backlight naked eye 3D technology has perfectly solved the resolution loss problem, and it realizes the presentation of 3D images in the form of no loss of resolution by a technology in which the image source is independent of the light source. The method is compatible with various 3D movies and 3D games in the market, and avoids the phenomenon of reverse vision of the traditional 3D technology. The directional backlight source mainly comprises directional backlight sources, a lens array, an image display layer, a linear diffusion sheet and other optical devices. Among them, the image display device is mainly a liquid crystal panel having a refresh rate of 120HZ or 240 HZ. When the left eye image is refreshed, the corresponding LED of the left eye is turned on; and when the right eye image is refreshed, the corresponding LED of the right eye is started, and the single eye refresh rate is greater than 60HZ, so that the phenomenon of screen flash is avoided. In addition, it does not need a pixel level lens to match the LCD, and is easy to process. It still has some drawbacks such as being limited to 3D images where only one optimal viewing distance is experienced for the focal length of the lens, i.e. limited longitudinal viewing distance.
The prior art discloses a naked eye 3D backlight module, a display device and a display method, which include: the LED time sequence board comprises one or more groups of LED backlight sources, each group of LED backlight sources comprises n LED units, the n LED units emit light in a time sequence of at least 240Hz, n is more than or equal to 4 and is an even number; each convex lens corresponds to one LED unit and is used for converging light emitted by the LED units into parallel light with the same direction; each polygonal prism corresponds to one group of LED backlight sources, the number of refraction edges is n, and the polygonal prisms are used for refracting parallel light passing through the convex lenses in the same rear direction into parallel light in n directions; the refreshing frequency of the TFT-LCD is consistent with the time sequence frequency of the LED backlight source and is used for controlling the transmittance of parallel light; and the multi-view parallax barrier is used for forming n-viewpoint area display of the parallel light passing through the TFT-LCD in the space. However, the LED backlights of this patent are located on the same plane and at equal distances from the lens, resulting in a limited vertical viewing distance, which is a 3D image with only one optimal viewing distance experiencing high display quality.
Disclosure of Invention
The invention aims to provide a full-parallax naked eye 3D display system and method based on human eye tracking with large depth.
In order to achieve the above object, the present invention provides a full parallax naked eye 3D display method based on human eye tracking, comprising the following steps:
s1, sequentially arranging a display module, a lens array and a backlight module from back to front, wherein the backlight module comprises a plurality of backlight units, each backlight unit comprises a plurality of lamp beads, and the distances between the lamp beads and the lens array are unequal;
s2, determining the space position of the pupil of the human eye;
s3, controlling the display module to display pictures corresponding to the left eye and the right eye respectively according to the space positions of the pupils of the human eyes, and simultaneously controlling the backlight module to synchronously light the corresponding lamp groups; when the lamp group is lighted, the corresponding lamp beads are lighted according to the rule that the light spots falling into the left eye and the right eye do not overlap.
Preferably, in step S3, the light spot is located at or closest to the viewpoint, and the central light bead is used as a center light bead to light the corresponding light beads around the central light bead.
As a preferred scheme, if the optimal viewing distance is dj, and the number of the corresponding lighted lamp beads is Nj; when the distance between the pupil and the display module is di, the number of the lighted lamp beads Ni is determined according to the formula N1/Ni di/d 1.
Preferably, assuming that the interpupillary distance is D, the density of the lamp beads in the backlight unit is m, the distance between the lamp beads and the lens array is D1, the distance between the pupil and the lens array is D2, and the number of the lighted lamp beads is determined according to the formula ((N +1) × m)/D1/D2.
As a preferred scheme, a plurality of parallax images with uniform spacing are distributed in the visual area space, the spacing between two adjacent parallax images is the interpupillary distance of human eyes, and the interpupillary distance of the human eyes is determined by the precision of a camera for identifying the pupils of the human eyes; in step S3, a parallax image corresponding to the viewpoint is displayed with the spatial position of the pupil of the human eye as the viewpoint.
The invention also provides a full-parallax naked-eye 3D display system based on human eye tracking, which comprises a display module, a lens array and a backlight module, wherein the display module, the lens array and the backlight module are sequentially arranged at intervals from back to front, the lens array comprises a plurality of lenses, the backlight module comprises a plurality of backlight units, each backlight unit comprises a plurality of lamp beads, and the distance between each lamp bead in one backlight unit and the lens array is unequal.
Preferably, the lenses are fresnel lenses, the lenses are hexagonal lenses, the lenses are arranged in a honeycomb shape, and the center of each lens is located on a spherical surface with the best viewing position as the center of the sphere.
Preferably, the backlight unit includes an installation housing, the installation housing is of a hexagonal frustum shape, the bottom surface of the installation housing is open and has an opening facing the lens array, the lamp beads are arranged on the inner wall of the installation housing, the bottom surfaces of the installation housings of the backlight unit are arranged in a honeycomb shape, and the center of the bottom surface of each installation housing is positioned at the position most adjacent to the center of the bottom surface of the installation housingThe best viewing position is the center of the sphere and the radius is
Where v is the distance between the best viewing position and the display module, and f is the focal length of the lens.
As the preferred scheme, a plurality of the lamp beads are arranged on the mounting shell in a staggered manner.
Preferably, a directional diffusion film is disposed between the display module and the lens array.
Compared with the prior art, the invention has the beneficial effects that:
the distance between the lamp beads of the backlight unit and the lens array is different, so that the object distances between the lamp beads and the lens are different, the image distances of the lamp beads penetrating through the lens are different, different lamp beads are lightened, the imaging distance is different, the corresponding lamp beads are lightened according to the distance between the human eyes and the display module, the distance between the lamp beads and the lens is determined by the distance between the human eyes and the display module, the depth position of the visual area can be adjusted, the optimal viewing experience is guaranteed, and the depth range of the display module is enlarged.
Drawings
Fig. 1 is a flowchart of a full-parallax naked-eye 3D display method based on human eye tracking according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a full-parallax naked-eye 3D display system based on human eye tracking according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a full parallax naked eye 3D display based on human eye tracking according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a backlight module according to an embodiment of the invention.
Fig. 5 is a structural schematic of a backlight unit of an embodiment of the present invention.
Fig. 6 is a schematic distribution diagram of lamp beads according to an embodiment of the present invention.
FIG. 7 is a schematic view of the distribution of visual area images according to an embodiment of the present invention.
In the figure, 1-display module; 2-a lens; 3-a backlight unit; 301-mounting the housing; 302-lamp bead; 4-directed diffusion membrane.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Example one
As shown in fig. 1 to 7, a full parallax naked eye 3D display method based on human eye tracking according to a preferred embodiment of the present invention includes the following steps:
s1, sequentially arranging a display module 1, a lens array and a backlight module from back to front, wherein the backlight module comprises a plurality of backlight units 3, the backlight units 3 comprise a plurality of lamp beads 302, and the distances between the lamp beads 302 and the lens array are different;
s2, determining the space position of the pupil of the human eye;
s3, controlling the display module 1 to display the pictures corresponding to the left eye and the right eye respectively according to the space positions of the pupils of the human eyes, and simultaneously controlling the backlight module to synchronously light the corresponding lamp groups; when the lamp set is lighted, the corresponding lamp beads 302 are lighted according to the rule that the light spots falling into the left eye and the right eye are not overlapped.
The interval between the lamp beads 302 of the backlight unit and the lens array is different, so that the object distance between each lamp bead 302 and the lens 2 is different, thereby the image distance between each lamp bead 302 and the lens 2 is different, therefore, different lamp beads 302 are lightened, the distance of imaging is different, the corresponding lamp beads 302 are lightened according to the distance between the human eyes and the display module 1, the distance between the lamp beads 302 and the lens 2 is determined by the distance between the human eyes and the display module, the depth position of the visual area can be adjusted, the best viewing experience is ensured, and the depth range of the display module 1 is enlarged.
The display module 1 includes an image output unit and an image display unit. The image output unit is used for converting the image data into a 3D image with a corresponding format. The output end of the image output unit is connected with the image display unit and the backlight module, so that the image display unit displays the parallax image and controls the backlight module to light the corresponding lamp beads 302. The image output unit outputs the image to the image display unit in a time-division mode, extracts the synchronous signal and sends the synchronous signal to the backlight module.
The picture displayed by the image display unit and the bright lamp group formed by the lamp beads lightened by the backlight module correspond to the left eye and the right eye of the viewer, namely the left eye and the right eye of the viewer respectively correspond to a group of picture and the bright lamp group, so that the pictures and light spots of the left eye and the right eye of the viewer are different and have parallax, and a 3D image is synthesized in the brain of the viewer, so that 3D vision is obtained.
This embodiment is through the two-purpose spatial position of people's eye tracking module location, and display module 1 exports the picture that this eye corresponds according to the real-time spatial position that locates of left eye and right eye, and backlight module lightens corresponding lamp pearl 302 according to the real-time spatial position that locates of left eye and right eye, and the light that lamp pearl 302 sent passes through the lens refraction, with the directional projection of parallax image on display module 1's the image display unit in the people's eye. Different image point positions of the lens 2 correspond to different lamp beads 302, and the lamp beads 302 at different positions are turned on, so that the depth positions of different visual areas can be formed, and the extension of the depth range is realized.
The light emitted by each lamp bead 302 has photons with a certain angle and quantity, and the photons fall behind the display module 1 and are located at different spatial positions through the refraction of the lens 2, in the embodiment, the lamp beads 302 corresponding to light spots falling into the left eye and the right eye are determined by simulating the light ray tracks or the photon falling point positions of the lamp beads 302, and the simulation results of the viewpoint positions are stored, when the user watches the light, the spatial positions of pupils of human eyes are used as real-time viewpoint positions, the scheme for lighting the lamp beads 302 corresponding to the viewpoint positions is called, and the backlight module is controlled to execute the corresponding lighting scheme.
Specifically, when the lighting scheme in step S3 is formulated, the embodiment uses the lamp bead whose light ray trajectory drop point is located at or closest to the viewpoint position as the central lamp bead, and lights the corresponding lamp beads around the central lamp bead by using the central lamp bead as the center of a circle according to the size of the light spot. Because the lamp beads 302 are distributed with a certain density, each viewpoint position does not necessarily have a lamp bead 302 with a corresponding light ray track falling point at the viewpoint position, therefore, screening is performed according to the light ray track falling point of each lamp bead, if there is a lamp bead 302 with a falling point exactly at the viewpoint position, the lamp bead 302 is taken as a center lamp bead, and if there is no lamp bead with a light ray track falling point closest to the viewpoint position, the lamp bead is taken as a center lamp bead. Because the person has left eye and right eye, the left eye corresponds different bright banks with the right eye, then need select two central lamp pearls that correspond respectively with left eye and right eye. According to different viewing occasions, the central lamp bead is used as the center, the lighting area is expanded outwards, and the number of the lighted lamp beads 302 is increased, so that crosstalk is reduced or uniformity is increased.
The number of the lamp beads 302 with the pupils lighted at the optimal viewing distance is obtained through simulation in the embodiment, and the number of the lamp beads 302 with the pupils at other viewing positions is determined according to the number of the lighted lamp beads 302. If the optimal viewing distance is dj, and the number of the corresponding lighted lamp beads is Nj; when the distance between the pupil and the display module 1 is di, the number of the lighted lamp beads Ni is determined according to the formula N1/Ni di/d1, and the efficiency can be improved.
When the positions of the viewpoints are different, the display module 1 displays different parallax image contents, and after the spatial position of the pupil is detected, the image output unit transmits the parallax image stored in advance to the image display unit according to the spatial position of the pupil. The region viewed by human eyes is a visual region, as shown in fig. 7, the visual region space includes three directions, the X direction is a transverse direction, the Y direction is a vertical direction, and the Z direction is a longitudinal direction; a plurality of parallax images with uniform space are distributed in visual area space, the parallax images are replaced according to the space positions of pupils of human eyes, the space between every two adjacent parallax images is the interpupillary distance of the human eyes, the interpupillary distance of the human eyes is determined by the precision of a camera for identifying the pupils of the human eyes, the positions of the pupils of the human eyes are determined by a camera of a human eye tracking module to shoot images of the pupils of the human eyes, and the interpupillary distance for identifying the left eye and the right eye accounts for a plurality of pixels on the images shot by the camera, so the higher the precision of the camera is, the more accurate the interpupillary distance is, and the more the parallax images are distributed in the visual area space. According to the precision of the camera, designing the parallax image distribution and the parallax image content of the visual area corresponding to different viewpoint positions, and storing the parallax image distribution and the parallax image content; when watching, according to the space position of the pupil, selecting the viewpoint position closest to the pupil position, and displaying the visual area image corresponding to the viewpoint position. In this embodiment, the precision value of the camera of the eye tracking module and the software thereof is used as the selected value of the viewpoint density value, and the corresponding parallax image is stored in advance to be called. Therefore, in step S3, the parallax image corresponding to the viewpoint is displayed with the spatial position of the pupil of the human eye as the viewpoint. In addition, the refresh rate of the display module 1 is greater than or equal to 120 Hz.
Example two
The difference between this embodiment and the first embodiment is that, in the first embodiment, the method for determining the number 302 of the lit lamp beads corresponding to the optimal viewing distance is adopted to simulate the light ray trajectory of the lamp beads 302, in this embodiment, the interpupillary distance is set to be D, the density of the lamp beads in the backlight unit is set to be m, the distance between the lamp beads and the lens array is set to be D1, the distance between the pupil and the lens array is set to be D2, and the number of the lit lamp beads is determined according to the formula ((N +1) × m)/D1/D2, so that the efficiency of determining the lit lamp beads 302 is further improved.
Other steps in this embodiment are the same as those in the first embodiment, and are not described herein again.
EXAMPLE III
According to fig. 2 to 5, the embodiment provides a full-parallax naked-eye 3D display system based on human eye tracking, which includes a display module 1, a lens array and a backlight module, the display module 1, the lens array and the backlight module are sequentially arranged from back to front at intervals, the lens array includes a plurality of lenses 2, the backlight module includes a plurality of backlight units 3, the backlight units 3 include a plurality of lamp beads 302, and the distances between each lamp bead 302 in one backlight unit 3 and the lens array are different. Make lamp pearl 302 different with lens 2's object distance, and then make the image distance different, when opening different lamp pearl 302, can make the depth position of visual area different, when making the viewer be located the different distance positions with display module 1, can both have the best to watch and experience, enlarge the depth range.
The display module 1 of the present embodiment includes an image output unit and an image display unit. The image output unit is used for converting the image data into a 3D image with a corresponding format. The output end of the image output unit is connected with the image display unit and the backlight module, so that the image display unit displays the parallax image and controls the backlight module to light the corresponding lamp beads 302. The image output unit outputs the image to the image display unit in a time-division mode, extracts the synchronous signal and sends the synchronous signal to the backlight module. In addition, the system of this embodiment still includes binocular pupil tracking module and control module, and binocular pupil tracking module is used for the spatial position of the pupil of location left eye and right eye, and control module is used for storing and information interaction, and display module 1, backlight module and binocular pupil tracking module are connected with control module communication respectively.
In the present embodiment, one backlight unit 3 corresponds to one lens 2. Specifically, the lens array is formed by arranging a plurality of lenses 2, the lenses are fresnel lenses, the lenses are hexagonal, and the lenses are arranged in a honeycomb shape, and the center of each lens is located on a spherical surface with the best viewing position as the center of the sphere.
The backlight unit 3 of the present embodiment includes a mounting case 301, and the mounting case 301 is of a hexagonal frustum shapeThe bottom surface of the installation shell 301 is open and the opening faces the lens array, the lamp beads 302 are arranged on the inner wall of the installation shell 301, the bottom surfaces of the installation shells 301 of the backlight units 3 are arranged in a honeycomb shape, and the center of the bottom surface of each installation shell 301 is positioned by taking the optimal viewing position as the spherical center and the radius as the radius
Where v is the distance from the optimal viewing position to the display module 1 and f is the focal length of the lens. The mounting housing 301 of this embodiment includes five substrates, the top substrate being hexagonal and the remaining substrates being trapezoidal. When the position of the pupil of the human eye, i.e., the viewpoint position, is detected, the corresponding lamp bead 302 in the backlight unit 3 is lit to illuminate the human eye. In the embodiment, the lamp beads 302 entering the through holes are used as central lamp beads, and a corresponding number of lamp beads 302 around the central lamp beads are continuously lightened to be used as monocular illumination; meanwhile, a plurality of lamp beads 302 are arranged between the lamp bead 302 groups which are correspondingly opened by the left eye and the right eye at intervals and are used as dark areas of two eyes. When the monocular illumination is turned on, the image output unit of the display module 1 synchronously outputs the monocular image stored in the corresponding spatial position in advance to the image display unit for display, and high-quality naked eye 3D display with ultrahigh definition, full parallax, large depth, high uniformity and low crosstalk can be realized. The lamp beads 302 are distributed on the hexagonal frustum-shaped mounting shell 301, space pointing illumination can be performed, continuous switching of seamless intensive visual areas is performed on space viewpoints, and continuity of experience of transverse and longitudinal movement is guaranteed.
Example four
As shown in fig. 6, the difference between the present embodiment and the third embodiment is that a plurality of lamp beads 302 in the present embodiment are distributed on the installation shell 301 in a staggered arrangement, and can correspond to more viewpoints, so that a group of lamp beads 302 is illuminated in any view zone in the view zone space.
Other structures of this embodiment are the same as those of this embodiment, and are not described herein again.
EXAMPLE five
The present embodiment is different from the fourth embodiment in that, on the basis of the present embodiment, the present embodiment is provided with the directional diffusion film 4 between the display module 1 and the lens array. The directional diffusion film 4 can diffuse light, and increase the brightness uniformity of the backlight module. The diffusion angle of the oriented diffusion film 4 of the present example was 1 °.
Other structures of this embodiment are the same as those of the fourth embodiment, and are not described herein again.
To sum up, the embodiment of the present invention provides a full parallax naked-eye 3D display method based on human eye tracking, which sequentially sets a display module 1, a lens array and a backlight module from back to front, wherein the backlight module includes a plurality of backlight units 3, the backlight unit 3 includes a plurality of lamp beads 302, and the distances between each lamp bead 302 and the lens array are unequal; when the device is used specifically, the spatial position of the pupil of the human eye is determined firstly; then, controlling the display module 1 to display the pictures corresponding to the left eye and the right eye respectively according to the spatial positions of the pupils of the human eyes, and simultaneously controlling the backlight module to synchronously light the corresponding lamp groups; when the lamp group is lighted, the corresponding lamp beads 302 are lighted according to the rule that the light spots falling into the left eye and the right eye are not overlapped; the interval between the lamp beads 302 of the backlight unit and the lens array is different, so that the object distance between each lamp bead 302 and the lens 2 is different, thereby the image distance between each lamp bead 302 and the lens 2 is different, therefore, different lamp beads 302 are lightened, the distance of imaging is different, the corresponding lamp beads 302 are lightened according to the distance between the human eyes and the display module 1, the distance between the lamp beads 302 and the lens 2 is determined by the distance between the human eyes and the display module, the depth position of the visual area can be adjusted, the best viewing experience is ensured, and the depth range of the display module 1 is enlarged. In addition, the embodiment also provides a full-parallax naked-eye 3D display system based on human eye tracking for implementing the method, which includes a display module 1, a lens array and a backlight module, the display module 1, the lens array and the backlight module are sequentially arranged from back to front at intervals, the lens array includes a plurality of lenses 2, the backlight module includes a plurality of backlight units 3, the backlight units 3 include a plurality of lamp beads 302, and the distances between each lamp bead 302 in one backlight unit 3 and the lens array are unequal.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A full-parallax naked eye 3D display method based on human eye tracking is characterized by comprising the following steps:
s1, sequentially arranging a display module (1), a lens array and a backlight module from back to front, wherein the backlight module comprises a plurality of backlight units (3), each backlight unit (3) comprises a plurality of lamp beads (302), and the distances between the lamp beads (302) and the lens array are different;
s2, determining the space position of the pupil of the human eye;
s3, controlling the display module (1) to display pictures corresponding to the left eye and the right eye respectively according to the space positions of the pupils of the human eyes, and simultaneously controlling the backlight module to synchronously light the corresponding lamp groups; when the lamp group is lighted, the corresponding lamp beads (302) are lighted according to the rule that the light spots falling into the left eye and the right eye are not overlapped.
2. The full-parallax naked eye 3D display method based on human eye tracking according to claim 1, wherein in step S3, a lamp bead (302) with a light ray trajectory falling point at or closest to a viewpoint position is taken as a center lamp bead, and corresponding lamp beads (302) around the center lamp bead are lighted according to the size of a light spot and with the center lamp bead as a circle center.
3. The full-parallax naked eye 3D display method based on human eye tracking according to claim 2, wherein if the optimal viewing distance is dj and the number of the corresponding lighted lamp beads (302) is Nj; when the distance between the pupil and the display module (1) is di, the number Ni of the lighted lamp beads (302) is determined according to the formula N1/Ni di/d 1.
4. The full parallax naked eye 3D display method based on human eye tracking according to claim 2, wherein assuming that the interpupillary distance is D, the density of the lamp beads (302) in the backlight unit (3) is m, the distance between the lamp beads (302) and the lens array is D1, the distance between the pupil and the lens array is D2, and the number of the lighted lamp beads (302) is determined according to the formula ((N +1) × m)/D1/D2.
5. The full-parallax naked eye 3D display method based on human eye tracking according to claim 1, wherein a plurality of parallax images with uniform spacing are distributed in visual area space, the spacing between two adjacent parallax images is human eye interpupillary distance, and the human eye interpupillary distance is determined by the precision of a camera for identifying human eye pupils; in step S3, a parallax image corresponding to the viewpoint is displayed with the spatial position of the pupil of the human eye as the viewpoint.
6. The full-parallax naked-eye 3D display system based on human eye tracking is characterized by comprising a display module (1), a lens array and a backlight module, wherein the display module (1), the lens array and the backlight module are sequentially arranged from back to front at intervals, the lens array comprises a plurality of lenses (2), the backlight module comprises a plurality of backlight units (3), each backlight unit (3) comprises a plurality of lamp beads (302), and the distance between each lamp bead (302) in each backlight unit (3) and the lens array is unequal.
7. The full parallax naked eye 3D display system based on human eye tracking according to claim 1, wherein the lenses (2) are Fresnel lenses (2), the lenses (2) are hexagonal in shape, and a plurality of the lenses (2) are arranged in a honeycomb shape, and the center of each lens (2) is located on a spherical surface with the best viewing position as the spherical center.
8. The full parallax naked eye 3D display system based on human eye tracking according to claim 1, wherein the backlight unit (3) comprises a mounting case (301), the mounting case (301) is of a hexagonal frustum shape, the bottom surface of the mounting case (301) is open and faces the lens array, the lamp beads (302) are arranged on the inner wall of the mounting case (301), the bottom surfaces of the mounting cases (301) of the plurality of backlight units (3) are arranged in a honeycomb shape, and the center of the bottom surface of each mounting case (301) is located with the best viewing position as a sphere center and the radius as a radius
Wherein v is the distance from the optimal viewing position to the display module (1) and f is the focal length of the lens (2).
9. The full parallax naked eye 3D display system based on human eye tracking according to claim 8, wherein a plurality of the lamp beads (302) are distributed on the mounting shell (301) in a staggered arrangement.
10. The full parallax naked eye 3D display system based on human eye tracking according to claim 1, wherein a directional diffusion film (4) is arranged between the display module (1) and the lens array.
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