CN115802848A - Display device and method for manufacturing the same - Google Patents

Abstract

The present disclosure provides a display device and a method of manufacturing the same. The display device includes: the light-emitting device comprises a light-emitting element array, a first lens array arranged on one side of the light-emitting direction of the light-emitting element array, and a second lens array arranged on one side of the first lens array, which is far away from the light-emitting element array; each first lens in the first lens array is arranged opposite to 1 or more light-emitting elements in the light-emitting element array, so that light emitted by each light-emitting element is changed into a beam of collimated light after passing through the corresponding first lens, and all the collimated light has multiple orientations; a gap is reserved between the second lens array and the first lens array, and each second lens in the second lens array is arranged opposite to the first lenses so that each beam of collimated light is converged into a quasi-point light source with a limited visual angle range. Provides a brand-new realization scheme of naked eye stereoscopic display.

Description

Display device and method for manufacturing the same

Technical Field

The disclosure belongs to the technical field of display, and particularly relates to a display device and a preparation method thereof.

Background

This section is intended to provide a background or context to the embodiments recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

Three-dimensional display without any equipment and with high reduction degree becomes a necessary choice for the future of display technology, and the technology gradually plays an important role in more and more fields such as medical imaging, exhibition and display, commercial display, military command, government emergency scheduling and communication media and the like at present and also becomes a novel display scheme which is vigorously developed in various countries.

An auto-stereoscopic display technology based on a directional backlight source is a display technology capable of realizing 3D image watching by naked eyes. The directional backlight display technology controls the direction of light emitted by the backlight source, so that a screen image can be received only at a space set position. By means of the time division multiplexing technology, the left eye/right eye of a person alternately and respectively receive parallax images of the left eye and the right eye, and finally, stereo depth information is obtained through brain fusion. At present, the directional backlight technology needs to be matched with the human eye tracking technology to solve the problem of limited viewing positions, namely, the eye coordinates of one or more viewers are captured in real time by using image devices such as cameras and the like, whether the viewers are in a visible area or not is judged, and then the correct left-eye and right-eye images are played by refreshing a display according to the positions of the viewers.

Disclosure of Invention

The present disclosure provides a display device and a method of manufacturing the same.

The technical scheme adopted by the disclosure is as follows: a display device, comprising: the light-emitting device comprises a light-emitting element array, a first lens array arranged on one side of the light-emitting direction of the light-emitting element array, and a second lens array arranged on one side, far away from the light-emitting element array, of the first lens array; each first lens in the first lens array is arranged opposite to 1 or more light-emitting elements in the light-emitting element array, so that light emitted by each light-emitting element is changed into a beam of collimated light after passing through the corresponding first lens, and all the collimated light has multiple orientations; and a gap is reserved between the second lens array and the first lens array, and each second lens in the second lens array is arranged opposite to the plurality of first lenses so that each beam of collimated light is converged into a quasi-point light source with a limited visual angle range, wherein the visual angle range of part of quasi-point light sources is different from that of other part of quasi-point light sources.

In some embodiments, the light emitting element array forms sub-pixels of a plurality of colors, sub-5 pixels of the same color are arranged in a plurality of rows along the first direction, the sub-pixels of the same color of a set number of rows are adjacent to each other and form a sub-pixel group,

the sub-pixel groups with different colors are periodically arranged along a second direction, and the first direction and the second direction are two directions which are parallel to the plane where the light-emitting element array is located and intersect with each other.

In some embodiments, the first lenses are cylindrical lenses extending along the first direction, and each of the first lenses is disposed opposite to one or more rows of same-color sub-pixels arranged along the first direction.

In some embodiments, the second lens is a cylindrical lens, the extending direction of the second lens intersects the first direction, and the width of the second lens is greater than or equal to the width of the first lens.

In some embodiments, the array of light emitting elements forms a plurality of color sub-pixels, the same color sub-pixels are arranged in a plurality of rows along the second direction, the different color sub-pixels are arranged alternately and periodically along the first direction,

the first direction and the second direction are two directions parallel to the plane in which the light emitting element array is located and intersecting each other 5.

In some embodiments, the first lenses are lenticular lenses extending along the first direction, and each of the first lenses is disposed opposite to one or more rows of sub-pixels arranged along the first direction.

In some embodiments, the second lenses are lenticular lenses extending in the first direction, each of the second lenses being disposed opposite to the same number of the first lenses.

In some embodiments, the number of the light emitting elements corresponding to each of the first lenses is the same, and the relative position relationship between each light emitting element and the corresponding first lens is periodically distributed along the second direction.

In some embodiments, further comprising: the light-transmitting layer is arranged between the first lens array and the light-emitting element array, is divided into a plurality of light-transmitting areas by a black matrix, and is arranged opposite to the first lenses in a one-to-one correspondence manner.

5 the technical scheme adopted by the disclosure is as follows: a method of making a display device, comprising:

providing an array of light emitting elements;

forming a first lens array on one side of the light emitting direction of the light emitting element array;

forming a second lens array on one side of the first lens array far away from the light-emitting element array;

each first lens in the first lens array is arranged opposite to 1 or 0 light-emitting elements in the light-emitting element array, so that light emitted by each light-emitting element is changed into a beam of collimated light after passing through the corresponding first lens, and all the collimated light has multiple orientations; and a gap is reserved between the second lens array and the first lens array, and each second lens in the second lens array is arranged opposite to the plurality of first lenses so that each beam of collimated light is converged into a quasi-point light source with a limited visual angle range, wherein the visual angle range of part of quasi-point light sources is different from that of other part of quasi-point light sources.

In some embodiments, further comprising: and forming a light-transmitting layer between the first lens array and the light-emitting element array, forming a black matrix in the light-transmitting layer to divide the light-transmitting layer into a plurality of light-transmitting areas, wherein the light-transmitting areas are arranged opposite to the first lenses in a one-to-one correspondence manner.

Light emitted by the light-emitting element is refracted by the first lens array and the second lens array, and then a quasi-point light source array is formed in the free space. Each point light source in the quasi-point light source array has a limited light-emitting angle, and only part of the light emitted by the quasi-point light source can be seen from a specific visual angle. The viewer does not need to wear a specific device and the images seen from different viewing angles are different. Through proper debugging and design, naked eye three-dimensional display can be realized.

Drawings

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.

Fig. 2 is a schematic distribution diagram of an array of light emitting elements according to an embodiment of the present disclosure.

Fig. 3 is a schematic distribution diagram of a first lens array of an embodiment of the present disclosure.

Fig. 4 is a schematic distribution diagram of a second lens array of an embodiment of the present disclosure.

Fig. 5 is a schematic distribution diagram of an array of light-emitting elements according to further embodiments of the present disclosure.

FIG. 6 is a schematic distribution diagram of a first lens array according to further embodiments of the present disclosure.

FIG. 7 is a schematic distribution diagram of a second lens array according to further embodiments of the present disclosure.

Fig. 8a and 8b are partially enlarged views of a display device according to an embodiment of the present disclosure.

Fig. 9 to 12 are schematic views of several intermediate states of the display device in the manufacturing process thereof according to the embodiment of the present disclosure.

Wherein the appendage is labeled: r, a red light emitting element; g. a green light emitting element; b. a blue light emitting element; 1. a light transmitting layer; 11. a black matrix; 11a, black UV resin; 12. a first lens; 13. a second lens.

Detailed Description

The disclosure will be further described with reference to the embodiments shown in the drawings.

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.

Referring to fig. 1, an embodiment of the present disclosure provides a display device including: the lens array comprises a light emitting element array, a first lens array arranged on one side of the light emitting direction of the light emitting element array, and a second lens array arranged on one side of the first lens array far away from the light emitting element array.

The light-emitting element is, for example, an organic light-emitting diode (OLED), a quantum dot light-emitting diode (qd-LED) or a Micro-LED. In some embodiments, a single micro led chip includes 1 micro led, i.e., includes one light emitting element. In other embodiments, a single micro led chip comprises a plurality of independently controlled micro leds, i.e. a plurality of light emitting elements.

The light emitting element array is specifically disposed on the display substrate. The display substrate is, for example, a glass-based display substrate. The display substrate is, for example, a silicon-based display substrate.

The display substrate is, for example, an active display substrate, in which pixel circuits are provided in one-to-one correspondence with the light emitting elements to drive each light emitting element to light up.

In the configuration diagram shown in fig. 1, a plurality of red light-emitting elements, a plurality of green light-emitting elements, and a plurality of blue light-emitting elements, for example, 12 red light-emitting elements r, 12 green light-emitting elements g, and 12 blue light-emitting elements b are arranged in this order from left to right. The 1 red light emitting element r constitutes 1 red sub-pixel. The 1 green light emitting element g constitutes 1 green sub-pixel. The 1 blue light emitting element b constitutes 1 blue sub-pixel.

In other embodiments, the light emitting devices emit white light, and a color film (not shown) is disposed on a light emitting surface side of the light emitting devices to form color sub-pixels. The color film is provided between the first lens 12 and the light-emitting element, for example.

Each first lens 12 in the first lens array is arranged opposite to 1 or more light-emitting elements in the light-emitting element array, so that light emitted by each light-emitting element is changed into a bundle of collimated light after passing through the corresponding first lens 12, and all the collimated light has multiple orientations.

The first lens 12 is, for example, a plano-convex lens, a biconvex lens, a biconcave lens, or a positive meniscus lens. The first lens 12 is again for example a fresnel lens.

When the first lenses 12 are disposed opposite to 1 light emitting element, the orientations of some of the first lenses 12 may be disposed different from those of the other first lenses 12, so that collimated light emitted from some of the first lenses 12 has a different orientation from those of the other first lenses 12. The two first lenses 12 are oriented differently, i.e., the major axes of the two lenses are oriented differently.

When the first lens 12 is disposed opposite to the plurality of light emitting elements, the plurality of light emitting elements and the first lens 12 have different relative position relationships, so that collimated light emitted by a part of the light emitting elements and emitted after passing through the same first lens 12 has different orientations from collimated light emitted by another part of the light emitting elements and emitted after passing through the same first lens 12.

According to the current view angle of fig. 1, collimated light emitted from some red light emitting elements r at the lower left of the first lens 12 is refracted by the first lens 12 and then emitted to the upper right. Some of the collimated light emitted by the green light emitting element g directly below the first lens 12 and refracted by the first lens 12 is emitted directly above. Some of the collimated light emitted from the green light emitting element g at the lower right of the first lens 12 is refracted by the first lens 12 and then emitted toward the upper left.

With continued reference to fig. 1, a gap is left between the second lens array and the first lens array, and each second lens 13 in the second lens array is disposed opposite to the plurality of first lenses 12, so that each beam of collimated light is converged into a quasi-point light source with a limited viewing angle range, wherein the viewing angle range of some quasi-point light sources is different from that of other quasi-point light sources.

The second lens 13 is, for example, a plano-convex lens, a biconvex lens, a biconcave lens, or a positive meniscus lens. The second lens 13 is again for example a fresnel lens.

Ignoring the gaps between the three beams of red collimated light directed to the upper right of the second lens 13, these 3 beams of red collimated light are considered to be 1 beam of collimated light, according to the current viewing angle of figure 1. The second lens 13 refracts and converges the collimated red light beam into a red collimated light source. The light-emitting direction of the red quasi-point light source faces to the upper right and has a limited viewing angle range.

Ignoring the gaps between the three beams of green collimated light directed directly up to the second lens 13, these 3 beams of green collimated light are considered to be 1 beam of collimated light, according to the current viewing angle of figure 1. The second lens 13 refracts and converges the collimated green light beam to a green collimated point light source. The light emitting direction of the green quasi-point light source is basically towards the right top, and the green quasi-point light source has a limited viewing angle range.

Ignoring the gaps between the three beams of blue collimated light directed towards the upper left towards the second lens 13, these 3 beams of blue collimated light are considered to be 1 beam of collimated light, according to the current viewing angle of figure 1. The second lens 13 refracts and converges the collimated blue light beam to form a blue collimated point light source. The light emitting direction of the blue quasi-point light source faces to the upper left and has a limited viewing angle range.

If the 3 beams of red collimated light, the 3 beams of green collimated light and the 3 beams of blue collimated light are considered independently, 9 beams of collimated light form 9 quasi-point light sources on the side, away from the first lens array, of the second lens array, and the 9 quasi-point light sources have 9 central light emitting directions. The 9 quasi-point light sources are approximately spatially coincident. The viewing angle range of these quasi-point light sources is limited, and the central light-emitting direction of some quasi-point light sources is different from that of other quasi-point light sources.

It should be noted that the quasi-point light source in the present disclosure means that the area of the light source is small enough to be perceived by the user. The light emitting surface of the quasi-point light source can be in any suitable shape such as a circle, a rectangle, a regular hexagon and the like.

The number of light emitting elements in a display device is large, forming an array of quasi-point light sources in free space. When viewing the array of quasi-point light sources from a particular viewing angle, the user can only see a portion of the quasi-point light sources emitting light in a particular direction (i.e., light from a portion of the light-emitting elements). When viewing the array of quasi-point light sources from another specific viewing angle, the user can only see the light emitted from another part of quasi-point light sources (i.e. the light emitted from another part of light-emitting elements) which emit light in a specific direction. The viewer does not need to wear a specific device and the images seen from different viewing angles are different. Through proper debugging and design, naked eye three-dimensional display can be realized.

Fig. 2 is a schematic distribution diagram of an array of light emitting elements according to an embodiment of the present disclosure. Fig. 3 is a schematic distribution diagram of a first lens array of an embodiment of the present disclosure. Fig. 4 is a schematic distribution diagram of a second lens array of an embodiment of the present disclosure.

In some embodiments, referring to fig. 2 to 4, the light emitting device array forms sub-pixels of multiple colors, the sub-pixels of the same color are arranged in multiple rows along a first direction, the sub-pixels of the same color with a set number of rows are adjacent to each other and form sub-pixel groups, the sub-pixel groups of different colors are periodically arranged along a second direction, and the first direction and the second direction are two directions parallel to a plane where the light emitting device array is located and intersecting each other.

In the embodiment shown in fig. 2, the light emitting elements in the display device are periodically arranged along the second direction in such a manner that the red light emitting element r, the green light emitting element g, the blue light emitting element b, and the blue light emitting element b are periodically arranged. And the light emitting elements of the same color are aligned in the first direction.

In other embodiments, the light emitting elements in the display device are periodically arranged along the second direction according to 3 red light emitting elements r, 3 green light emitting elements g, and 3 blue light emitting elements b. And the light emitting elements of the same color are aligned in the first direction.

In some other embodiments, the light emitting elements in the display device are periodically arranged along the second direction according to the N red light emitting elements r, the N green light emitting elements g, and the N blue light emitting elements b. And the light emitting elements of the same color are aligned in a first direction, and N is an integer greater than or equal to 1.

In some embodiments, the first lenses 12 are cylindrical lenses extending along a first direction, and each of the first lenses 12 is disposed opposite to one or more rows of same-color sub-pixels arranged along the first direction.

Referring to fig. 3, a single first lens 12 is disposed opposite to 2 rows of red light emitting elements r arranged in the first direction, or 2 rows of green light emitting elements g arranged in the first direction, or 2 rows of blue light emitting elements b arranged in the first direction.

The light emitting elements have equal size along the second direction, and the size along the first direction is periodically distributed according to the large, small and large periods.

The first lens 12 changes the traveling direction of the light only in the second direction, and has no influence on the traveling direction of the light in the first direction.

This simplifies the optical path design of the display device and the structural design of the display device.

In some embodiments, the second lens 13 is a cylindrical lens, the extending direction of the second lens 13 intersects the first direction, and the width of the second lens 13 is greater than or equal to the width of the first lens 12.

In combination with fig. 3 and 4, the extending direction of the first lens 12 is different from the extending direction of the second lens 13. The purpose is to reduce or eliminate moire and adjust viewpoint continuity.

In other embodiments, the extending direction of the first lens 12 is the same as the extending direction of the second lens 13.

Fig. 5 is a schematic distribution diagram of an array of light-emitting elements according to further embodiments of the present disclosure. FIG. 6 is a schematic distribution diagram of a first lens array according to further embodiments of the present disclosure. FIG. 7 is a schematic distribution diagram of a second lens array according to further embodiments of the present disclosure.

In some embodiments, the light emitting element array includes sub-pixels of a plurality of colors, the sub-pixels of the same color are arranged in a plurality of rows along a second direction, the sub-pixels of different colors are alternately and periodically arranged along a first direction, and the first direction and the second direction are two directions parallel to a plane in which the light emitting element array is located and intersecting with each other.

Referring to fig. 5, in the light emitting element array, a row of red sub-pixels arranged in the second direction, a row of green sub-pixels arranged in the second direction, a row of blue sub-pixels arranged in the second direction, a row of red sub-pixels arranged in the second direction, a row of green sub-pixels arranged in the second direction, and a row of blue sub-pixels arranged in the second direction are sequentially arranged in the first direction. Such a periodic arrangement. In each row of sub-pixels arranged along the second direction, the sub-pixels with the same position numbers are aligned along the first direction.

Referring to fig. 6, in some embodiments, the first lenses 12 are cylindrical lenses extending along a first direction, and each of the first lenses 12 is disposed opposite to one or more rows of sub-pixels arranged along the first direction.

Referring to fig. 7, in some embodiments, the second lenses 13 are lenticular lenses extending in the first direction, and each of the second lenses 13 is disposed opposite to the same number of the first lenses 12.

In the embodiment shown in fig. 7, 10 same-color sub-pixels arranged along the second direction corresponding to the second lens 13 may be divided into 10 subdivided viewing angle ranges in free space.

In some embodiments, the number of the light emitting elements corresponding to each first lens 12 is the same, and the relative position relationship between each light emitting element and the corresponding first lens 12 is periodically distributed along the second direction.

Referring to fig. 3, each of the first lenses 12 corresponds to 2 rows of light emitting elements arranged in the first direction. In a top perspective view of the display device, the pattern of the boundaries of each 2 first lenses 12 and the corresponding light emitting elements is completely coincident. In other embodiments, the pattern of the boundaries of each first lens 12 and the corresponding light-emitting element completely coincide in a top perspective view of the display device.

Fig. 8a and 8b are partially enlarged views of a display device according to an embodiment of the present disclosure.

In some embodiments, referring to fig. 8a and 8b, the display device further includes: and the light-transmitting layer 1 is arranged between the first lens array and the light-emitting element array, the light-transmitting layer 1 is divided into a plurality of light-transmitting areas by the black matrix 11, and the light-transmitting areas and the first lenses 12 are arranged in a one-to-one correspondence manner. The light-transmitting layer 1 can be used to adjust the distance between the first lens 12 and the light-emitting element. In some embodiments, the light transmissive layer 1 is colorless and light transmissive. In other embodiments, the light transmitting layer 1 is colored and light transmitting. The black matrix 11 functions to prevent mutual interference between lights emitted from the light emitting elements to which the adjacent first lenses 12 are opposed.

In the embodiment shown in fig. 8a, the first lens 12 is equally spaced from the plurality of light emitting elements opposite thereto.

In the embodiment shown in fig. 8b, the distances between the first lens 12 and the plurality of light emitting elements opposite thereto are slightly different. This is so that the distance from each light emitting element to the center of the first lens 12 is approximately the focal length of the first lens 12.

The shape and size of the same color sub-pixels may be the same or different. The pitches of the rows of sub-pixels arranged along the second direction may be equal or different. The present disclosure is not limited thereto.

In the top perspective view of the display device, the first lens 12 may have other shapes such as a square, a regular hexagon, and a circle; the first lens 12 may have other shapes such as a square, a regular hexagon, and a circle.

During the display process of the display device, the images within each subdivided viewing angle range may be refreshed simultaneously or sequentially. The images within each subdivided viewing angle range may be displayed simultaneously or in time-division. For example, a plurality of light emitting elements facing the same first lens 12 are sequentially turned on at different periods of time, so that quasi-parallel light beams of different directions are emitted from the first lens 12 at different periods of time. The present disclosure is not limited thereto. The position of the second lens 13 should be adjusted appropriately so that adjacent viewing angle ranges overlap substantially without gaps and substantially without overlap, avoiding viewing zones that overlap or are discontinuous.

Based on the same inventive concept, embodiments of the present disclosure also provide a method for manufacturing a display device, including:

providing an array of light emitting elements;

forming a first lens array on one side of the light emitting direction of the light emitting element array;

forming a second lens array on one side of the first lens array, which is far away from the light-emitting element array;

each first lens 12 in the first lens array is arranged opposite to 1 or more light-emitting elements in the light-emitting element array, so that light emitted by each light-emitting element is changed into a beam of collimated light after passing through the corresponding first lens 12, and all the collimated light has multiple orientations; a gap is left between the second lens array and the first lens array, and each second lens 13 in the second lens array is arranged opposite to the plurality of first lenses 12, so that each beam of collimated light is converged into a quasi-point light source with a limited viewing angle range, wherein the viewing angle range of part of the quasi-point light sources is different from that of the other part of the quasi-point light sources.

Specifically, a light emitting diode display substrate is provided. A first lens array is formed 5 on the light-emitting surface of the led display substrate. The second lens array may be spaced from the first lens array by air. For example, the light emitting element array and the first lens array are provided in one frame body, and the second lens array is supported by the frame body. The second lens array may also be spaced from the first lens array by a transparent material.

In some embodiments, further comprising: a light-transmitting layer 1 is formed between the first lens array and the light-emitting element array, a black matrix 11 is formed in the light-transmitting layer 1 to divide the light-transmitting layer 1 into a plurality of light-transmitting regions, and the light-transmitting regions 0 are arranged in one-to-one correspondence with the first lenses 12.

Fig. 9 to 12 are schematic views of several intermediate states of the display device in the manufacturing process thereof according to the embodiment of the present disclosure.

Specifically, referring to fig. 9, a layer of transparent UV resin is first spin-coated on the light emitting surface of the light emitting element array, and then the transparent UV resin is exposed, etched and developed to obtain a plurality of light transmitting layers 1, and each light transmitting layer 1 covers 5 a plurality of light emitting elements corresponding to the light transmitting layer.

With continued reference to fig. 10, a layer of black UV resin 11a is spin coated under vacuum. The black UV resin 11a fills the vacant region between the adjacent light-transmitting layers 1 and covers the top surface of the light-transmitting layer 1.

With continued reference to fig. 11, the black UV resin 11a is exposed, etched, and developed, resulting in a black matrix 11.

With continued reference to fig. 12, a plurality of first lenses 12 are formed on the top surface of the light-transmissive layer 1. The first lens 120 may be formed using photolithography or nanoimprinting. The orthographic projection of the first lens 12 on the light-transmitting layer 1 covers the corresponding light-transmitting layer 1, and the orthographic projection shape and size of the first lens 12 on the light-transmitting layer 1 are approximately the same as the overall outline of the plurality of single-color light-emitting elements covered. For example, the plurality of single-color light emitting elements covered by the first lens 12 are arranged in a rectangular array, and the orthographic projection of the first lens 12 on the light-transmitting layer 1 is approximately in a rectangular shape covering and slightly exceeding this rectangular array. For another example, if the plurality of monochromatic light emitting elements 5 covered by the first lens 12 are arranged in a circular ring shape, the orthographic projection of the first lens 12 on the light transmitting layer 1 is approximately in a circular shape covering and slightly exceeding the circular ring.

And the orthographic projection of the edge of the first lens 12 on the light-transmitting layer 1 falls on the black matrix 11 between the light-transmitting layer 1 and the adjacent light-transmitting layer 1. Enabling substantially seamless and substantially non-overlapping overlap of adjacent viewing angle ranges and avoiding cross-talk between adjacent viewing angles.

0 in the embodiment of the present disclosure, the major axis of the second lens 13 is parallel to the major axis of the first lens 12 which it covers.

The embodiments in the disclosure are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The scope of the present disclosure is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present disclosure by those skilled in the art without departing from the scope and spirit of the present disclosure. It is intended that the present disclosure also cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims (11)

1. A display device, comprising: the light-emitting device comprises a light-emitting element array, a first lens array arranged on one side of the light-emitting direction of the light-emitting element array, and a second lens array arranged on one side of the first lens array, which is far away from the light-emitting element array; each first lens in the first lens array is arranged opposite to 1 or more light-emitting elements in the light-emitting element array, so that light emitted by each light-emitting element is changed into a beam of collimated light after passing through the corresponding first lens, and all the collimated light has multiple orientations; and a gap is reserved between the second lens array and the first lens array, and each second lens in the second lens array is arranged opposite to the plurality of first lenses so that each beam of collimated light is converged into a quasi-point light source with a limited visual angle range, wherein the visual angle range of part of quasi-point light sources is different from that of other part of quasi-point light sources.

2. The display device according to claim 1, wherein the light emitting element array forms sub-pixels of a plurality of colors, the sub-pixels of the same color are arranged in a plurality of rows in a first direction, a set number of the sub-pixels of the same color are adjacent to each other and constitute sub-pixel groups, and the sub-pixel groups of different colors are periodically arranged in a second direction, and the first direction and the second direction are two directions parallel to a plane in which the light emitting element array is located and intersecting each other.

3. The display device according to claim 2, wherein the first lenses are lenticular lenses extending along the first direction, and each of the first lenses is disposed opposite to one or more rows of the same-color sub-pixels arranged along the first direction.

4. The display device according to claim 3, wherein the second lens is a lenticular lens, an extending direction of the second lens intersects the first direction, and a width of the second lens is greater than or equal to a width of the first lens.

5. The display device according to claim 1, wherein the light emitting element array forms sub-pixels of a plurality of colors, the sub-pixels of the same color are arranged in a plurality of rows in a second direction, the sub-pixels of different colors are alternately and periodically arranged in a first direction, and the first direction and the second direction are two directions parallel to a plane in which the light emitting element array is located and intersecting with each other.

6. The display device according to claim 5, wherein the first lenses are lenticular lenses extending in the first direction, and each of the first lenses is disposed opposite to one or more rows of the sub-pixels arranged in the first direction.

7. The display device according to claim 6, wherein the second lenses are columnar lenses extending in the first direction, each of the second lenses being disposed opposite to the same number of the first lenses.

8. The display device according to claim 1, wherein the number of the light emitting elements corresponding to each of the first lenses is the same, and a relative positional relationship between each of the light emitting elements and the corresponding first lens is periodically distributed along the second direction.

9. The display device according to claim 1, further comprising: the light-transmitting layer is arranged between the first lens array and the light-emitting element array, is divided into a plurality of light-transmitting areas by a black matrix, and is arranged opposite to the first lenses in a one-to-one correspondence manner.

10. A method of manufacturing a display device, comprising:

providing an array of light emitting elements;

forming a first lens array on one side of the light emitting direction of the light emitting element array;

forming a second lens array on one side of the first lens array, which is far away from the light-emitting element array;

each first lens in the first lens array is arranged opposite to 1 or more light-emitting elements in the light-emitting element array, so that light emitted by each light-emitting element is changed into a beam of collimated light after passing through the corresponding first lens, and all the collimated light has multiple orientations; and a gap is reserved between the second lens array and the first lens array, and each second lens in the second lens array is arranged opposite to the plurality of first lenses so that each beam of collimated light is converged into a quasi-point light source with a limited visual angle range, wherein the visual angle range of part of quasi-point light sources is different from that of other part of quasi-point light sources.

11. The method of claim 10, further comprising: and forming a light-transmitting layer between the first lens array and the light-emitting element array, forming a black matrix in the light-transmitting layer to divide the light-transmitting layer into a plurality of light-transmitting areas, wherein the light-transmitting areas are arranged opposite to the first lenses in a one-to-one correspondence manner.

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