阅读说明：本技术 一种裸眼立体显示装置和显示方法 (Naked eye stereoscopic display device and display method ) 是由 田依杉 孟宪芹 薛高磊 王维 郭宇娇 凌秋雨 彭玮婷 于 2020-11-17 设计创作，主要内容包括：本发明公开了一种裸眼立体显示装置和显示方法,以改善现有技术中裸眼立体显示装置存在角分辨率和空间分辨率相互制约的问题。所述裸眼立体显示装置,具有多个重复单元；所述重复单元包括：相对设置的基板和液晶盒,以及填充于所述基板和所述液晶盒之间的隔垫层；其中,每一所述重复单元内,所述基板面向所述隔垫层的一侧设置多个发光光源,所述液晶盒具有多个光控制单元,所述光控制单元被配置为控制所述发光光源入射光的透过率。(The invention discloses a naked eye stereoscopic display device and a display method, which aim to solve the problem that the angular resolution and the spatial resolution of the naked eye stereoscopic display device in the prior art are mutually restricted. The naked eye stereoscopic display device is provided with a plurality of repeating units; the repeating unit includes: the liquid crystal display panel comprises a substrate, a liquid crystal box and a spacer layer, wherein the substrate and the liquid crystal box are oppositely arranged, and the spacer layer is filled between the substrate and the liquid crystal box; wherein, in each repeating unit, a plurality of light emitting sources are arranged on one side of the substrate facing the spacer layer, and the liquid crystal box is provided with a plurality of light control units which are configured to control the transmittance of incident light of the light emitting sources.)

1. A naked eye stereoscopic display device is characterized by comprising a plurality of repeating units; the repeating unit includes: the liquid crystal display panel comprises a substrate, a liquid crystal box and a spacer layer, wherein the substrate and the liquid crystal box are oppositely arranged, and the spacer layer is filled between the substrate and the liquid crystal box; wherein the content of the first and second substances,

in each of the repeating units, a plurality of light emitting sources are disposed on a side of the substrate facing the spacer layer, and the liquid crystal cell has a plurality of light control units configured to control transmittance of incident light from the light emitting sources.

2. The autostereoscopic display device of claim 1, wherein a dam structure is disposed between adjacent repeating units, and a height of the dam structure in a direction perpendicular to the substrate is the same as a height of the spacer layer in a direction perpendicular to the substrate.

3. The autostereoscopic display device of claim 1 or 2,

each repeating unit comprises: a the luminous light sources are arranged in a row and a column; each repeating unit comprises b × b light control units which are arranged in b rows and b columns;

and a is the center of the array formed by the luminous light sources, and is superposed with the center of the array formed by the b is the center of the array formed by the light control units.

4. The autostereoscopic display device of claim 3, wherein the number of the luminescent light sources n in each of the repeating units satisfies the following relationship:

and n is H/H, wherein H represents the refreshing frequency of the liquid crystal box, H represents the frequency of the human visual persistence effect, and n is greater than a.

5. The autostereoscopic display device of claim 1, wherein a viewpoint divergence angle of each of the light control unitsThe included angle omega between the adjacent viewpoints satisfies the following relation:

wherein the content of the first and second substances,Ω ═ np/L, n1 denotes the refractive index of the spacer layer, a denotes the width of the light control unit in a first direction, w denotes the width of the light emission source in the first direction, L denotes the thickness of the spacer layer in the direction perpendicular to the substrate, n denotes the number of light emission sources in each of the repeating units, p denotes the pitch between the centers of the adjacent light control units, the light emission sources are square in the orthographic projection of the substrate, and the first direction is parallel to a frame of the square.

6. The autostereoscopic display device of claim 1, wherein the light emitting source is a micro light emitting diode.

7. The autostereoscopic display apparatus of claim 1, further comprising a pupil tracking device configured to track a movement position of a pupil of an eye of a user.

8. A display method of the autostereoscopic display apparatus according to any one of claims 1 to 7, comprising:

controlling the light-emitting light source to emit light;

and controlling the liquid crystal box to display a parallax image corresponding to the current light emitting source through the light control unit according to the current light emitting source.

9. The display method of claim 8, wherein the controlling the light emitting source to emit light comprises: and controlling the light-emitting light sources in the repeating unit to alternately emit light in sequence.

10. The display method of claim 8, wherein the autostereoscopic display apparatus further comprises a pupil tracking device;

the control of the light-emitting light source to emit light includes:

moving, by the pupil tracking device, a location of a pupil of an eye of a user;

and controlling the corresponding light-emitting light source to emit light according to the current pupil position.

Technical Field

The invention relates to the technical field of stereo, in particular to a naked eye stereo display device and a display method.

Background

Naked eye three-dimensional (3D) display is a trend of future display development, and mainly includes holographic 3D display, volumetric 3D display, auto-stereoscopic 3D display technology, and the like. Among them, the autostereoscopic 3D display technology has been considered as a naked eye 3D display technology that is most likely to be commercially popularized due to the capability of obtaining a three-dimensional display effect of dynamic, color, and a large field angle. The free three-dimensional (3D) display technology comprises a cylindrical lens array technology, a parallax barrier technology, a micro lens array integrated imaging technology and the like, wherein the 2D display screen and an optical element are adopted, the 2D display screen is divided in a specific mode and is used for displaying 2D images with different viewing angles, and then the 2D images are converted into 3D images seen by human eyes through a specific optical principle. The common defect of the display modes is that for the same 2D display screen, the angular resolution and the spatial resolution of a 3D image seen by human eyes are mutually restricted. Resulting in that when the viewer sees a good stereoscopic effect, the perceived image is blurred (PPI is low), and when the PPI of the image is increased, the stereoscopic effect of the 3D display is worse. The 2D display screen adopting higher PPI is an effective method for solving this problem, but due to the processing technology, the 2D display screen with higher PPI is currently difficult to obtain.

Disclosure of Invention

The invention provides a naked eye stereoscopic display device and a display method, which aim to solve the problem that the angular resolution and the spatial resolution of the naked eye stereoscopic display device in the prior art are mutually restricted.

The embodiment of the invention provides a naked eye three-dimensional display device, which is provided with a plurality of repeating units; the repeating unit includes: the liquid crystal display panel comprises a substrate, a liquid crystal box and a spacer layer, wherein the substrate and the liquid crystal box are arranged oppositely, and the spacer layer is filled between the substrate and the liquid crystal box; wherein the content of the first and second substances,

in each of the repeating units, a plurality of light emitting sources are disposed on a side of the substrate facing the spacer layer, and the liquid crystal cell has a plurality of light control units configured to control transmittance of incident light from the light emitting sources.

In a possible implementation manner, a retaining wall structure is arranged between adjacent repeating units, and the height of the retaining wall structure in the direction perpendicular to the substrate is the same as the height of the spacer layer in the direction perpendicular to the substrate.

In one possible embodiment, each of the repeating units includes: a the luminous light sources are arranged in a row and a column; each repeating unit comprises b × b light control units which are arranged in b rows and b columns;

and a is the center of the array formed by the luminous light sources, and is superposed with the center of the array formed by the b is the center of the array formed by the light control units.

In one possible embodiment, the number of the luminescent light sources n in each of the repeating units satisfies the following relation:

and n is H/H, wherein H represents the refreshing frequency of the liquid crystal box, H represents the frequency of the human visual persistence effect, and n is greater than a.

In one possible embodiment, the viewpoint divergence angle of each of the light control unitsThe included angle omega between the adjacent viewpoints satisfies the following relation:

wherein the content of the first and second substances,n1 denotes a refractive index of the spacer layer, a denotes a width of the light control unit in a first direction, w denotes a width of the light emission source in the first direction, L denotes a thickness of the spacer layer in a direction perpendicular to the substrate, n denotes a number of the light emission sources in each of the repeating units, p denotes a pitch between centers of the adjacent light control units, an orthogonal projection of the light emission sources on the substrate is a square, and the first direction is a direction perpendicular to the substrateParallel to a border of the square.

In one possible embodiment, the light-emitting source is a micro light-emitting diode.

In a possible embodiment, the autostereoscopic display apparatus further comprises a pupil tracking device configured to track a movement position of a pupil of an eye of the user.

The embodiment of the invention also provides a display method of the naked eye stereoscopic display device, which comprises the following steps:

controlling the light-emitting light source to emit light;

and controlling the liquid crystal box to display a parallax image corresponding to the current light emitting source through the light control unit according to the current light emitting source.

In a possible embodiment, the controlling the light emitting source to emit light includes: and controlling the light-emitting light sources in the repeating unit to alternately emit light in sequence.

In one possible embodiment, the autostereoscopic display apparatus further comprises a pupil tracking device;

the control of the light-emitting light source to emit light includes:

moving, by the pupil tracking device, a location of a pupil of an eye of a user;

and controlling the corresponding light-emitting light source to emit light according to the current pupil position.

The embodiment of the invention has the following beneficial effects: in the embodiment of the invention, the naked eye stereoscopic display device is provided with a plurality of repeating units F; each repeating unit F includes: a substrate 1 and a liquid crystal cell 2 which are oppositely arranged, and a spacer layer 3 filled between the substrate 1 and the liquid crystal cell 2; in each repeating unit F, a plurality of light-emitting sources 10 are arranged on one side of the substrate 1 facing the spacer layer 3, the liquid crystal box 2 is provided with a plurality of light control units 20, the light control units 20 are configured to control the transmittance of incident light of the light-emitting sources 10, the light-emitting sources 10 emit light, the light control units 20 passing through the liquid crystal box after a certain transmission distance are divided into a plurality of lights in different directions to respectively form different visual angles, so that the separation of the visual angles is realized, and when in display, images with certain parallax are loaded on each visual angle, so that naked eye three-dimensional display can be realized, moreover, a plurality of light-emitting sources (for example, n) and a plurality of light control units (for example, m) are arranged in one repeating unit F, one light-emitting source can generate m visual points corresponding to the m light control units, the n point light sources are alternatively, and finally displaying the m x n viewpoint images by using the persistence of vision effect. Therefore, by refreshing the time sequence, the number of the viewpoints is increased to n times of the original number on the premise of not reducing the resolution of the displayed image, a high-image-resolution and good stereoscopic effect is achieved, and the problem that the angular resolution and the spatial resolution of the stereoscopic display device in the prior art are mutually restricted is solved.

Drawings

Fig. 1 is a schematic structural diagram of a naked eye stereoscopic display device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a repeating unit provided in an embodiment of the present invention;

FIG. 3 is a schematic diagram of a distribution of light management units provided by an embodiment of the present invention;

FIG. 4 is a schematic distribution diagram of a light source according to an embodiment of the present invention;

fig. 5 is a schematic view of a viewpoint divergence angle provided by an embodiment of the present invention;

fig. 6 is a schematic diagram of an included angle between two adjacent viewpoints according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of another autostereoscopic display apparatus according to an embodiment of the present invention;

fig. 8 is a schematic view of a display method of a autostereoscopic display apparatus according to an embodiment of the present invention;

FIG. 9 is a diagram illustrating a relationship between a viewing angle and a viewpoint divergence angle according to an embodiment of the present invention;

fig. 10A is a schematic view illustrating viewpoint distribution when the light-emitting source numbered 1 in fig. 4 emits light according to an embodiment of the present invention;

fig. 10B is a schematic view illustrating the view point distribution when the light-emitting source numbered 2 in fig. 4 emits light according to an embodiment of the present invention;

fig. 10C is a schematic view illustrating the view point distribution when the light-emitting source numbered 3 in fig. 4 emits light according to an embodiment of the present invention;

fig. 10D is a schematic view illustrating the view point distribution when the light-emitting source numbered 4 in fig. 4 emits light according to an embodiment of the present invention;

fig. 10E is a schematic view of the viewpoint distribution when the 4 light-emitting light sources in fig. 4 simultaneously emit light according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.

Referring to fig. 1, an embodiment of the present invention provides a autostereoscopic display apparatus having a plurality of repeating units F; the repeating unit F includes: the liquid crystal display panel comprises a substrate 1, a liquid crystal box 2 and a spacer layer 3, wherein the substrate 1 and the liquid crystal box 2 are arranged oppositely, and the spacer layer is filled between the substrate 1 and the liquid crystal box 2; wherein the content of the first and second substances,

in each of the repeating units F, a plurality of light-emitting light sources 10 are disposed on a side of the substrate 1 facing the spacer layer 3, and the liquid crystal cell 2 has a plurality of light control units 20, the light control units 20 being configured to control transmittance of incident light from the light-emitting light sources 10. Specifically, the light source 10 may be a lambertian body light source, specifically, a point light source lambertian body light source, and has a three-dimensional light emitting effect, specifically, the light source 10 may be similar to a point light source, the point light source emits light for a lambertian body, the smaller the volume of the light source 10, the better, and specifically, the light source 10 may be a micro-LED.

In the embodiment of the invention, the naked eye stereoscopic display device is provided with a plurality of repeating units F; each repeating unit F includes: a substrate 1 and a liquid crystal box 2 which are oppositely arranged, and a spacer layer 3 filled between the substrate 1 and the liquid crystal box 2; in each repeating unit F, a plurality of light-emitting sources 10 are arranged on one side of a substrate 1 facing a spacer layer 3, a liquid crystal box 2 is provided with a plurality of light control units 20, the light control units 20 are configured to control the transmittance of incident light of the light-emitting sources 10, the light-emitting sources 10 emit light, the light control units 20 passing through the liquid crystal box after a certain transmission distance are divided into a plurality of light beams in different directions to form different visual angles respectively so as to realize the separation of the visual angles, and each visual angle is loaded with an image with a certain parallax during display so as to realize naked eye three-dimensional display, moreover, a plurality of light-emitting sources (for example, n) and a plurality of light control units (for example, m) are arranged in one repeating unit F, one light-emitting source can generate m visual points corresponding to the m light control units, the n point light sources are alternately lightened, and finally displaying the m x n viewpoint images by using the persistence of vision effect. Therefore, by refreshing the time sequence, the number of the viewpoints is increased to n times of the original number on the premise of not reducing the resolution of the displayed image, the high-resolution stereoscopic display device has a good stereoscopic effect while forming a high image resolution, and the problem that the angular resolution and the spatial resolution of the stereoscopic display device in the prior art are mutually restricted is solved.

In specific implementation, the Liquid Crystal cell 2 may adopt a Liquid Crystal Display (LCD) without a backlight source, and includes a lower polarizer, a TFT array substrate, a Liquid Crystal layer, an opposite substrate, and an upper polarizer, which are sequentially located on a side of the spacer layer 3 away from the substrate 1. The array substrate may be provided with a pixel electrode layer (specifically, may include a plurality of block-shaped pixel electrodes), and the opposite substrate may be provided with a common electrode layer, and by applying pressure to the pixel electrode and the common electrode, a pixel opening that can control light transmittance is formed. Specifically, each of the light control units may include a pixel electrode and a common electrode disposed opposite to each other, and a liquid crystal layer interposed between the pixel electrode and the common electrode. The opposite substrate may not be provided with a color film layer, the light emitting source may be monochromatic light emitting the same color, and the naked-eye stereoscopic display device may be a naked-eye stereoscopic display device performing monochromatic light display. Of course, the naked eye stereoscopic display device may also be a naked eye stereoscopic display device for performing color display, and specifically, each of the light emitting sources 10 may have a red sub light emitting source for emitting red light, a green sub light emitting source for emitting green light, and a blue sub light emitting source for emitting blue light, so as to implement color display; specifically, color display may be performed by setting a color resistance of the same color in each repeating unit and setting different color resistances in different repeating units, for example, as shown in fig. 1, a red color resistance may be set in the repeating unit F on the left side, a green color resistance may be set in the repeating unit F in the middle, and a blue color resistance may be set in the repeating unit F on the right side, so as to implement color stereoscopic display.

In specific implementation, as shown in fig. 1, a retaining wall structure 4 is disposed between adjacent repeating units F, and the height of the retaining wall structure 4 in the direction perpendicular to the substrate 1 is the same as the height of the spacer layer 3 in the direction perpendicular to the substrate 1. In the embodiment of the present disclosure, the retaining wall structure 4 is disposed between the adjacent repeating units F, so that the light emitted from the adjacent repeating units F can be shielded, and the crosstalk of the light emitted from the adjacent repeating units F can be avoided.

In specific implementation, referring to fig. 2, fig. 3 and fig. 4, where fig. 3 is a schematic layout diagram of the light control unit 20, and fig. 4 is a schematic layout diagram of the light-emitting source 10, each of the repeating units F includes: a light emitting sources 10, a light emitting sources 10 are arranged in a row and a column; each repeating unit F includes b × b light control units 20, and b × b light control units 20 are arranged in b rows and b columns; a × a light emitting sources 10 constitute the center O of the array, and b × b light controlling units 20 constitute the center O' of the array. Specifically, as shown in fig. 2, each repeating unit F includes: 2 × 2 light sources 10, 2 × 2 light sources 10 arranged in 2 rows and 2 columns; each repeating unit F includes 4 x 4 light management units 20, and 4 x 4 light management units 20 are arranged in 4 rows and 4 columns. The light emitting light sources 10 are arranged symmetrically about the center, and the light control units 20 are arranged symmetrically about the center.

In practical implementation, the number n of the point-emitting light sources 10 in one repeating unit F is firstly limited by the refresh frequency of the liquid crystal cell, and specifically, the number of the point-emitting light sources n in each repeating unit F satisfies the following relation: and n is H/H, wherein H represents the refreshing frequency of the liquid crystal box, H represents the frequency of the visual persistence effect of the human eyes, and n is greater than or equal to a, so as to realize a plurality of continuous pictures. Specifically, for example, the refresh frequency of the liquid crystal cell is 120Hz, and the number n of the light-emitting sources 10 is less than or equal to 5 in order to ensure 24Hz of the human eye visual persistence effect.

In particular, referring to FIGS. 5 and 6, the viewpoint divergence angle of each light management unit 20The included angle omega with the adjacent viewpoint satisfies the following relation:

wherein the content of the first and second substances,Ω ═ np/L, n1 denotes the refractive index of the spacer layer 3, a denotes the width of the light control unit 20 in the first direction AB, w denotes the width of the light-emitting sources 10 in the first direction AB, L denotes the thickness of the spacer layer 3 in the direction perpendicular to the substrate 1, n denotes the number of light-emitting sources 10 per repeating unit F, p denotes the spacing between the centers of adjacent light control units 20, the forward projection of the light-emitting sources 10 on the substrate 1 is square, and the first direction AB is parallel to a frame of the square. In the embodiment of the present invention, the viewpoint divergence angle of each light control unit 20The included angle omega with the adjacent viewpoint satisfies the following relation:crosstalk between adjacent viewpoints can be avoided.

In specific implementation, referring to fig. 7, the autostereoscopic display apparatus further includes a pupil tracking device configured to track a moving position of a pupil of an eye of the user. Specifically, the naked eye stereoscopic display device further comprises a light source control device for controlling a light source according to the information obtained by the pupil tracking device. Specifically, the light source and the liquid crystal cell may be used as a display module, and the pupil tracking device and the light source control device may be used as a control module.

Based on the same inventive concept, referring to fig. 8, an embodiment of the present invention further provides a display method of a naked eye stereoscopic display apparatus, including:

s100, controlling a light-emitting light source to emit light;

and S200, controlling the liquid crystal box to display the parallax image corresponding to the current luminous light source through the light control unit according to the current luminous light source.

In specific implementation, regarding step S100, controlling the light-emitting source to emit light includes: and controlling the light-emitting light sources in the repeating unit to alternately emit light in sequence.

In an embodiment of the present invention, controlling a light emitting source to emit light includes: and the light-emitting light sources in the repeating unit are controlled to alternately emit light in sequence, so that the naked eye stereoscopic display device has lower manufacturing cost and the complexity of the display device is simplified.

In specific implementation, the autostereoscopic display apparatus further comprises a pupil tracking device; with respect to step S100, controlling the light emitting source to emit light includes:

step S101, moving positions of pupils of eyes of a user are tracked through pupil tracking equipment;

and S102, controlling the corresponding light-emitting light source to emit light according to the current pupil position.

In the embodiment of the invention, the pupil tracking device tracks the position of the pupil of the human eye, so that the position of the viewpoint is determined, the position is fed back to the light source control device to light a proper light source, and refreshing is not performed any more, so that the refreshing frequency of the display panel and the number of the light-emitting light sources under each repeating unit are not required.

In order to more clearly understand the autostereoscopic display apparatus provided by the embodiment of the invention, the following is further described in detail with reference to the autostereoscopic display apparatus shown in fig. 1 as follows:

the naked eye three-dimensional display device consists of a substrate 1, a light-emitting light source 10 (a point light source), a spacer layer 3, a BM (barricade structure 4) and a liquid crystal box 2 (an LCD panel);

A. the substrate 1, specifically, the substrate 1 selects the material with good flatness and stability and easy to glue, preferably a glass substrate, and also can use silicon or polyester compound, and no special requirement is made on the thickness of the substrate 1, specifically, a driving circuit for driving the light-emitting light source 10 can be arranged on the substrate 1 to control the light-emitting of the light-emitting light source 10;

B. a light-emitting light source 10 (point light source) which emits light by a lambertian body, wherein the smaller the volume is, the better the light is, and a micro-LED is preferred; the point light source is body-emitting or surface-emitting, and the volume of the point light source and the divergence angle of each viewpoint(ii) related; referring to FIG. 5, the pixel opening has a width a, the point light source has a width w, and the intervalThe height of the cushion layer is L, the refractive index of the spacer layer is n1, and the geometrical relationship is as follows:

in particular, equality in this equation may be understood as being approximately equal to, i.e.,

it can be seen that the angle of divergenceThe width a (pixel opening) of the control unit 20 in the first direction AB and the width w of the light emitting source 10 in the first direction AB are in a direct proportional relationship, and the height L of the spacer layer 3 is in an inverse proportional relationship, so that the smaller the point light source volume is, the smaller the viewpoint divergence angle is, the more the number of viewpoints which can be realized in a certain viewing angle FOV is, as shown in fig. 9, the more the number of viewpoints which can be realized in a viewing angle FOV is, and if the viewpoint divergence angle is 8 °, the viewing angle FOV of 40 ° is divided into 5 viewpoints at most; if the viewpoint divergence angle is 4 degrees, the number of viewpoints is doubled within the same viewing angle FOV;

the point light sources are arranged periodically, one repeating unit F is a period, the size P of the period and the height L of the spacer layer jointly determine the size of an observation visual angle FOV, the FOV is approximately equal to 2n1arctan (P/2L), and the value P is properly adopted according to the size of the FOV;

the number n of point light sources in one period is firstly limited by the refreshing frequency of the LCD panel, if the LCD panel is 120Hz, the number n of the light sources is less than or equal to 5, and the refreshing frequency of the LCD panel is higher and better in order to ensure the 24Hz visual persistence effect of human eyes; secondly, n also determines the number of viewpoints to be comprehensively considered;

the relative positions of the n point light sources in one period are related to the arrangement of the viewpoints;

C. the spacer layer 3 is used for separating light of point light sources at each visual angle by a certain distance in space, the light emitted by the point light sources must be transmitted for a certain distance, the spacer layer 3 is used for ensuring a certain transmission distance, and the spacer layer 3 is a uniform, transparent and non-light-absorbing medium, preferably glass. The height L of the spacer layer 3 is related to the size of a view field angle and a pixel light-emitting divergence angle, and needs to be considered comprehensively;

D. the barrier structures 4(BM shields) are required to be BM shields between adjacent repeating units F in order to prevent crosstalk between the light-emitting sources 10 of different repeating units F, and barrier shielding methods in fig. 1 or other methods may be selected to play a role in preventing crosstalk;

E. liquid crystal cell (LCD panel), which adopts LCD display screen without backlight source, including lower polarizer, TFT array substrate, liquid crystal layer, opposite substrate and upper polarizer, the size p of light control unit 20 of liquid crystal cell 20 (i.e. pixel aperture size) determines the angle Ω between adjacent viewpoints, as shown in fig. 6, there is a geometrical relationship Ω np/L, specifically, the equal sign in the equation can be understood as being approximately equal to, i.e. Ω np/L, the pixel aperture a and viewpoint divergence angleCorrelation, guaranteed in multi-view 3D displaysTherefore, the number of pixels and the size of the opening of the LCD panel are comprehensively considered;

specifically, taking a mobile phone display as an example, the size of a mobile phone display panel is 2 inches, the viewing distance is 360mm, the display structure provided by the embodiment of the invention is used for realizing naked eye 3D display with super multiple viewpoints, in 2D display, the resolution ratio (PPI) of a mobile phone is about 250 generally, namely retina display (retina display) can be realized, and by using the traditional naked eye 3D display technology, if 4 × 4 viewpoints are realized, each viewpoint realizes retina/2 level, and the PPI of a required screen is 500. By using the display structure of the embodiment of the invention, 500PPI is adopted, the display screen with the refreshing frequency of 120Hz can realize 8-8 viewpoints, each viewpoint graph realizes the retina/2 level, and the structural parameters are shown in Table 1:

table 1 ultra-multi-view naked eye 3D display structure parameters

In conjunction with the repeating unit shown in fig. 2, one repeating unit includes 4 × 4 pixels and 2 × 2 dot light sources, and is arranged in a manner of being symmetrical about the center, the spacer layer 3 is glass, the refractive index n is 1.52, and the height L is 450 um; the display units are periodically arranged, 240 in total, and the view points formed at the viewing distance of 360mm when each light source with the same serial number is independently lit are shown in fig. 10A-10E, where fig. 10A is the view point distribution when the light source with the serial number 1 is lit, fig. 10B is the view point distribution when the light source with the serial number 2 is lit, fig. 10C is the view point distribution when the light source with the serial number 3 is lit, fig. 10D is the view point distribution when the light source with the serial number 4 in fig. 4 is lit, fig. 10E is the view point distribution when the 4 light sources in fig. 4 are simultaneously lit, the 4 light sources are alternately lit, the light source with the serial number 1 is lit for the first time to be lit for the next time as a period, and the refresh frequency of the point light source is 30Hz and exactly matches the refresh frequency of the screen 120 Hz. And the requirement of persistence of vision of human eyes can be met, and the human eyes can synthesize the viewpoint distribution diagram shown in fig. 10E in the brain. The total number of the viewpoints is 8 × 8, the included angle between adjacent viewpoints is 5 degrees, the angle of field of view is 40 ° × 40 degrees, the distance from the adjacent viewpoints to the viewing distance of 360mm is about 30mm, the interpupillary distance between the human eyes is about 60mm, and 3 viewpoints are included between two pupils, so that the picture can be more continuous.

The embodiment of the invention has the following beneficial effects: in the embodiment of the invention, the naked eye stereoscopic display device is provided with a plurality of repeating units F; each repeating unit F includes: a substrate 1 and a liquid crystal cell 2 which are oppositely arranged, and a spacer layer 3 filled between the substrate 1 and the liquid crystal cell 2; in each repeating unit F, a plurality of light-emitting sources 10 are arranged on one side of the substrate 1 facing the spacer layer 3, the liquid crystal box 2 is provided with a plurality of light control units 20, the light control units 20 are configured to control the transmittance of incident light of the light-emitting sources 10, the light-emitting sources 10 emit light, the light control units 20 passing through the liquid crystal box after a certain transmission distance are divided into a plurality of lights in different directions to respectively form different visual angles, so that the separation of the visual angles is realized, and when in display, images with certain parallax are loaded on each visual angle, so that naked eye three-dimensional display can be realized, moreover, a plurality of light-emitting sources (for example, n) and a plurality of light control units (for example, m) are arranged in one repeating unit F, one light-emitting source can generate m visual points corresponding to the m light control units, the n point light sources are alternatively, and finally displaying the m x n viewpoint images by using the persistence of vision effect. Therefore, by refreshing the time sequence, the number of the viewpoints is increased to n times of the original number on the premise of not reducing the resolution of the displayed image, a high-image-resolution and good stereoscopic effect is achieved, and the problem that the angular resolution and the spatial resolution of the stereoscopic display device in the prior art are mutually restricted is solved.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.