A display device

Abstract

The present invention relates to the field of display technology, and specifically to a display device, specifically comprising: at least two spliced ​​display screens, at least a lens group and a beam splitting lens are sequentially arranged along the light emitting direction of each of the display screens; and also comprising: at least one adjustment lens, the adjustment lens covering the partial orthographic projections of two adjacent beam splitting lenses based on the display screen based on the orthographic projection of the display screen, so that light rays of different directions emitted through each of the two adjacent beam splitting lenses are all incident on the same adjustment lens, and the corresponding optical paths of light rays of different directions partially overlap; in summary, the present application can realize the formation of at least two seamlessly spliced ​​imaging surfaces on the light emitting side of the adjustment lens through at least the cooperation of the lens group and the beam splitting lens, thereby ultimately realizing seamless splicing display.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display device. Background Art

[0002] In recent years, with the development of 3D technology, VR display technology has received widespread attention. However, there is a general limitation on the field of view. In other words, when at a wide viewing angle, the image quality is blurred and the immersive feeling is poor. In order to solve this problem, people think of using splicing to expand the field of view. However, due to the border limitation of the display screen, a seam will be formed at the joint of two adjacent display screens after splicing, thereby forming a certain size of display black area on the imaging surface, which in turn affects the display effect. Summary of the Invention

[0003] The purpose of the present application is to provide a display device to solve the technical problem in the prior art that a black area is formed on the imaging surface due to a seam formed at the joint of two adjacent display screens after splicing.

[0004] (1) Technical solution

[0005] To achieve the above-mentioned objectives, the present invention provides a display device, comprising: at least two spliced ​​display screens, at least one lens group and a beam splitting lens being sequentially arranged along the light emitting direction of each of the display screens; and further comprising: at least one adjustment lens, wherein the adjustment lens, based on the orthographic projection of the display screen, covers the partial orthographic projections of two adjacent beam splitting lenses based on the display screen, so that light rays of different directions emitted through each of the two adjacent beam splitting lenses are all incident on the same adjustment lens, and the optical paths corresponding to the light rays of different directions partially overlap.

[0006] Optionally, the display screen includes a plurality of pixel islands arranged in an array.

[0007] Optionally, the lens group is configured as a cylindrical lens array.

[0008] Optionally, the aperture of the adjustment lens is equal to the center distance between every two adjacent display screens.

[0009] Optionally, a polarizer and an electrically controlled wave plate are sequentially arranged between the lens group and the beam splitting lens along the light output direction.

[0010] Optionally, the beam splitting lens covers the orthographic projection of the polarizer based on the display screen based on the orthographic projection of the display screen.

[0011] Optionally, the ratio of the thickness of each lens in the lens group to its aperture is greater than or equal to 5.

[0012] Optionally, the distance d between the adjustment lens and the beam splitting lens is:

[0013]

[0014] Wherein, a is the aperture of the adjustment lens; b is the aperture of the display screen; and α is the angle between the two beams of light emitted through the beam splitting lens.

[0015] Optionally, the aperture of each lens in the lens group is equal to the size of each pixel island.

[0016] Optionally, the electrically controlled wave plate is spaced apart from or stacked with the polarizer and the beam splitter lens respectively.

[0017] Optionally, the electrically controlled wave plate covers the orthographic projection of the polarizer based on the display screen based on the orthographic projection of the display screen.

[0018] Optionally, the electrically controlled wave plate is configured as a half wave plate or a quarter wave plate.

[0019] (2) Beneficial effects

[0020] Compared with the prior art, this application has the following beneficial effects:

[0021] The present application provides a display device, comprising: at least two spliced ​​display screens, at least a lens group and a beam splitting lens are sequentially arranged along the light emitting direction of each of the display screens; and also comprising: at least one adjustment lens, wherein the adjustment lens covers the partial orthographic projections of two adjacent beam splitting lenses based on the display screen based on the orthographic projection of the display screen, so that light rays of different directions emitted through each of the two adjacent beam splitting lenses are all incident on the same adjustment lens, and the optical paths corresponding to the light rays of different directions partially overlap; in summary, the present application at least cooperates with the lens group and the beam splitting lens, so that the light rays emitted through at least two display screens are first collimated and adjusted through the lens group and then incident on the beam splitting lens, and then the beam splitting lens separates the left-handed light component and the right-handed light component of the incident light into two light rays of different directions, and finally ensures that the light rays of different directions emitted from each of the two adjacent beam splitting lenses are all incident on the same adjustment lens, thereby forming at least two seamlessly spliced ​​imaging surfaces on the light emitting side of the adjustment lens, and finally realizing seamless splicing display. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, a person skilled in the art can derive other drawings based on these drawings without inventive work, among which:

[0024] Figure 1 is a schematic structural diagram of the display device in this application;

[0025] Figure 2 yes Figure 1 A partial enlarged view of .

[0026] In the figure: 1. Display screen; 2. Lens group; 3. Polarizer; 4. Beam splitter lens; 5. Adjustment lens; 6. Electronically controlled wave plate. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] In recent years, with the development of 3D technology, VR display technology has received widespread attention. However, there is a general limitation on the field of view. In other words, when at a large viewing angle, the image quality is blurred and the immersive feeling is poor. In order to solve this problem, people think of using splicing to expand the field of view. However, due to the border limitation of the display screen 1, a seam will be formed at the joint of two adjacent display screens 1 after splicing, thereby forming a certain size of display black area on the imaging surface, which in turn affects the display effect.

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0030] In order to solve the technical problem that a black area is formed on the imaging surface due to a seam formed at the joint of two adjacent display screens 1 in the prior art display device after splicing, as shown in FIG. Figure 1 and Figure 2 As shown, the present application provides a display device, comprising:

[0031] At least two display screens 1 are spliced ​​together, wherein, in order to achieve wide-viewing angle display, for example, in order to ensure clear imaging at a field of view angle greater than 120°, the display device can be composed of multiple display screens 1 spliced ​​together. In theory, the more spliced ​​display screens 1 are, the larger the display field of the display device is. The specific number is not specifically limited in this embodiment; in this embodiment, for ease of understanding, two display screens 1 are spliced ​​together as an example. That is to say, if the technical solution of the present application can eliminate the splicing seam between the two display screens 1, then the splicing seam between each adjacent two display screens 1 when multiple display screens 1 are spliced ​​can also be eliminated.

[0032] In one embodiment, in order to improve the resolution, the display screen 1 includes: a plurality of pixel islands arranged in an array, wherein each pixel island is equivalent to a small display screen 1, each pixel island includes a plurality of sub-pixels arranged in an array, and the plurality of pixel islands can emit light of different colors, such as red, green and blue. For ease of understanding, the pixel islands emitting red light will be referred to as red pixel islands, the pixel islands emitting green light will be referred to as green pixel islands, and the pixel islands emitting blue light will be referred to as blue pixel islands. The plurality of pixel islands in each display screen 1 can be divided into multiple groups, each group including a red pixel island, a green pixel island and a blue pixel island. Color pixel islands, the images displayed by the three pixel islands in the same group fall into the same area on the retina, forming a superimposed effect, so that the viewer sees the superimposed image; of course, each group may include four pixel islands, and the four pixel islands in the same group are respectively a red pixel island, a green pixel island, a blue pixel island and a yellow pixel island, so that the multiple pixel islands in the display screen 1 emit four colors of light, and the combination of pixel islands in each group can be preset as needed; in summary, the resolution of each pixel island using the design of this embodiment can reach more than 10,000, thereby forming an ultra-high-resolution display screen 1.

[0033] In addition, in order to ensure that the light emitted through each pixel island can be collimated as much as possible, a lens group 2 is also provided on the light-emitting side of the display screen 1, and the multiple lenses in the lens group 2 are arranged in a one-to-one correspondence with the multiple pixel islands; specifically, the apertures of the multiple lenses in each lens group 2 are equal to the sizes of the multiple pixel islands in each display screen 1, that is, the orthographic projection of each lens based on the display screen 1 covers the orthographic projection of each pixel island based on the display screen 1, thereby ensuring that the light emitted through each pixel island is emitted after the luminous angle is converged by the corresponding lens, thereby improving the display effect.

[0034] A beam splitting lens 4 is further provided on the light-emitting side of the lens group 2. The beam splitting lens 4 is used to separate the left-handed light component and the right-handed light component of the incident light into two light rays in different directions, wherein the angle between the two light rays in different directions is α. In one embodiment, α is an acute angle. In one embodiment, the beam splitting lens 4 covers the orthographic projection of the lens group 2 based on the display screen based on the orthographic projection of the display screen, thereby ensuring that the light rays after collimation adjustment by the lens group 2 can all be incident on the corresponding beam splitting lens 4, thereby improving the beam splitting efficiency and thus improving the display effect.

[0035] It also includes: at least one adjustment lens, the adjustment lens covers the partial orthographic projections of two adjacent beam-splitting lenses based on the display screen based on the orthographic projection of the display screen, so that the light rays of different directions emitted through each two adjacent beam-splitting lenses are all incident on the same adjustment lens, and the light paths of the light rays of different directions partially overlap; that is, the imaging surface of the light-emitting side of the adjustment lens has an overlapping area, and another function of the overlapping area is to effectively avoid the existence of a gap between any imaging surface and the adjacent imaging surface due to errors such as differences in process conditions or manual operation during the production process; of course, the larger the overlapping area, the better the continuity of the imaging surface, but the larger the overlapping area, the smaller the effective display area, so in order to ensure the size of the effective display area, in one embodiment, the ratio of the width of the overlapping area to the width of the imaging surface is less than or equal to 5%; in summary, the design of this embodiment can ensure that the imaging surfaces formed by multiple display screens 1 through the adjustment lens 5 are continuous, and there is no seam between adjacent imaging surfaces, thereby achieving a coherent display.

[0036] In one embodiment, when the display screen 1 is set to two, the lens group 2 and the beam splitting lens 4 are correspondingly set to two. At this time, the adjustment lens 5 only needs to be set to one, and the adjustment lens 5 can be set at the connection between the two beam splitting lenses 4. That is to say, at this time, only the connection area of ​​the two beam splitting lenses 4 is used to eliminate the seams through the beam splitting operation, and the light in other areas can be emitted normally; similarly, when the display screen 1 is set to multiple, and exemplarily set to three, the lens group 2 and the beam splitting lens 4 are correspondingly set to three. At this time, the adjustment lens 5 is correspondingly set to two, and the two adjustment lenses 5 are set at intervals, and each adjustment lens 5 is set at the connection between the two beam splitting lenses 4, so that the light emitted from the two adjacent display screens 1 is modulated into light in different directions through the lens group 2 and the beam splitting lens 4, and then all are incident on the same adjustment lens 5.

[0037] To sum up, the present application at least cooperates with the lens group and the beam splitter lens, so that the light emitted through at least two display screens is first collimated and adjusted by the lens group and then incident on the beam splitter lens, and then the beam splitter lens separates the left-handed light component and the right-handed light component of the incident light into two light rays in different directions, and finally ensures that the light rays in different directions emitted by each two adjacent beam splitters are all incident on the same adjustment lens, thereby forming at least two seamlessly spliced ​​imaging surfaces on the light-emitting side of the adjustment lens, and finally realizing seamless splicing display, that is, the light enters the human eye after passing through the adjustment lens 5, and forms a complete and continuous image on the retina of the human eye; specifically, when the left-handed light component and the right-handed light component of the incident light are incident on the beam splitter lens, a conjugated additional phase will be obtained. Under the action of this conjugated additional phase, the left-handed light component and the right-handed light component of the incident light will have different transmission behaviors, and more specifically, the left-handed light component and the right-handed light component will be emitted at different angles.

[0038] In one embodiment, the lens group 2 is configured as a plano-convex lens array, and the flat side of the lens group 2 is in contact with the display screen 1; in another embodiment, the lens group 2 and the display screen 1 are spaced apart by a mounting frame, and the gap between the two can be filled with air or a transparent medium layer. When a transparent medium layer is used for filling, the refractive index of the transparent medium layer is close to the refractive index of the lens array, thereby ensuring that light emitted through the display screen can more easily enter the lens array. Of course, in one embodiment, air can be used for filling.

[0039] In one embodiment, the adjustment lens 5 is spaced apart from the beam splitting lens 4 through a mounting frame. The adjustment lens 5 and the beam splitting lens 4 can be connected by an air medium, or by a transparent medium layer, and the refractive index of the transparent medium layer is preferably close to the refractive index of the adjustment lens 5; more specifically, the two ends of the adjustment lens 5 are respectively fixedly connected to the mounting frame, or, in order to facilitate the installation and removal of the adjustment lens 5, the two ends of the adjustment lens 5 are respectively detachably connected to the mounting frame. In one embodiment, the end of the mounting frame away from the display module has a plurality of mounting positions, and the plurality of mounting positions are spaced apart, and each mounting position corresponds to the connection between each two adjacent beam splitting lenses 4. In one embodiment, the shape of the mounting position is adapted to the shape of the adjustment lens 5; in another embodiment, elastic snap-fitting parts are protruded from both ends of each mounting position. When the adjustment lens 5 is installed in the mounting position, the two ends of the adjustment lens 5 are stably installed in the mounting position under the action of the elastic snap-fitting parts; similarly, when the adjustment lens 5 needs to be repaired or replaced, it is only necessary to pull the adjustment lens 5 until the two ends of the adjustment lens 5 are separated from the two elastic snap-fitting parts.

[0040] In the aforementioned embodiment, each two adjacent display screens 1 can be spaced apart or in contact with each other. In order to avoid crosstalk caused by light emitted by the two display screens 1, in one embodiment, each two adjacent display screens 1 are spaced apart. When each two adjacent display screens 1 are placed in contact with each other in order to reduce the volume of the display device, in order to avoid crosstalk caused by light emitted by each two display screens 1, in one embodiment, each two adjacent display screens 1 are connected by an optical adhesive, and in one embodiment, the refractive index of the optical adhesive is less than the refractive index of the lens group 2. Of course, in one embodiment, each two adjacent display screens 1 are directly adjacent to each other because the refractive index of air is the smallest.

[0041] On the basis of the foregoing embodiments, in order to further realize the collimated emission of the light emitted through the lens group 2, in one embodiment, the lens group 2 is set as a cylindrical lens array. In one embodiment, the ratio between the thickness of each lens in the lens group 2 and its aperture is greater than or equal to 5, and the height of each cylindrical lens does not exceed 5 mm, thereby ensuring the thinness of the display device. In summary, the design of this embodiment can ensure that the light emitted through the display screen 1 is converged in the cylindrical lens, and finally the luminous angle of each beam of light will be further converged when it is emitted through the light-emitting side away from the display screen 1, thereby realizing collimated emission, and ultimately improving the splitting effect of the beam splitting lens 4 and improving the display effect.

[0042] In the aforementioned embodiment, the lens group 2 can be set as a spherical lens or a cylindrical lens. When the lens array adopts a spherical lens, it can be modulated in both the X-axis direction and the Y-axis direction. However, the modulation direction that can be observed by the human eye is only the X-axis direction, which causes the resolution of the display device in the Y-axis direction to be sacrificed. In order to solve the above technical problems, in this embodiment, the lens group 2 is set as a cylindrical lens array in one embodiment, so that modulation is only performed in the X-axis direction that can be observed by the human eye, thereby achieving the goal of providing horizontal parallax images only in the direction of the human eye, and not providing horizontal parallax images in the Y-axis direction which is not the modulation direction, that is, the resolution of the display device in the Y-axis direction is not sacrificed, thereby further improving the resolution of the display device; and the use of a cylindrical lens array has the advantage of simple processing.

[0043] The display screen 1 of the present invention can be set as a Micro-LED display screen 1, an LCD display screen 1, and other OLED display screens 1. In one embodiment, the display screen 1 is provided with a Micro-LED display screen 1. Depending on the function, it can be an ordinary OLED display screen 1, a transparent OLED display screen 1, etc.; according to the light-emitting principle, it can be an RGB three-color display screen 1, a white light + color film OLED display screen 1, a quantum dot + OLED display screen 1, etc. The present invention does not specifically limit the type of the display screen 1.

[0044] In another embodiment, in order to achieve a three-dimensional display effect, a polarizer and an electrically controlled wave plate are sequentially arranged between the lens group and the beam splitting lens along the light output direction; thereby ensuring that the collimated light emitted through the lens group is sequentially controlled by the polarizer and the electrically controlled wave plate before being incident on the beam splitting lens for splitting operation. In one embodiment, the polarizer 3 covers the orthographic projection of the lens group 2 based on the display screen 1 based on the orthographic projection of the display screen 1, and the beam splitting lens 4 covers the orthographic projection of the polarizer 3 based on the display screen 1 based on the orthographic projection of the display screen 1.

[0045] Among them, the polarizer is used to convert the incident light collimated by the lens group 2 into polarized light, so that only light with one rotation direction is emitted. In addition, the electrically controlled wave plate 6 is used to adjust the rotation direction of the received light according to the timing, and adjust the transmission direction of the adjusted light through the beam splitter lens, so that the light is finally transmitted to the adjustment lens 5 in the adjusted direction. For example, when the electrically controlled wave plate 6 emits left-handed light at the first moment, the left-handed light will be deflected to the first direction through the beam splitter lens, wherein the angle between the first direction and the direction perpendicular to the beam splitter lens is half of α. ; Similarly, when the electrically controlled wave plate 6 emits right-handed light at the second moment, the right-handed light will be deflected to the second direction through the beam splitting lens, wherein the angle between the second direction and the direction perpendicular to the beam splitting lens is half of α, wherein the angle between the light in the first direction and the light in the second direction is the beam splitting angle of the beam splitting lens, and the specific angle value is α. For example, for ease of understanding, the first direction can be identified as the direction of deflection to the left by half a beam splitting angle, and the second direction can be identified as the direction of deflection to the right by half a beam splitting angle. The beam splitting angle and the direction of deflection of the corresponding rotating light can be preset in the early stage.

[0046] Specifically, the electrically controlled wave plate 6 is externally connected to an electrically controlled device to control the switch of the electrically controlled wave plate 6. When the electrically controlled device controls the electrically controlled wave plate 6 to be closed, the left-handed light or right-handed light incident on the electrically controlled wave plate 6 is directly emitted through the electrically controlled wave plate 6 without any change; similarly, when the electrically controlled device controls the electrically controlled wave plate 6 to be opened, the left-handed light or right-handed light incident on the electrically controlled wave plate 6 is emitted after its rotational direction is changed. The specific connection structure and control process are all existing technologies, so they will not be described in detail here. In one embodiment, the electrically controlled wave plate 6 covers the orthographic projection of the polarizer 3 based on the display screen 1 based on the orthographic projection of the display screen 1.

[0047] More specifically, the light emitted through the lens group 2 is modulated by the polarizer 3 and becomes left-handed light or right-handed light. At this time, the electrically controlled wave plate 6 will perform high-frequency switching according to the refresh rate of the display screen 1, so that the human eye can feel the information provided by the left-handed and right-handed light. For example, the light emitted through the electrically controlled wave plate 6 is left-handed light at the first moment and right-handed light at the second moment, and the rotation direction of the emitted light is opposite to that of the light emitted from the pixel island, and so on. At the same time, image information from different viewpoints can be given by switching multiple pixel islands in conjunction with the electrically controlled wave plate 6. Then, information from two viewpoints will enter the human eye. When the refresh rate of the wave plate and the display screen 1 is greater than 120Hz, the human eye will not feel the jump caused by the switching, but will receive continuous multi-viewpoint information, thereby realizing light field display.

[0048] In summary, refer to Figure 2 The optical path diagram shown clearly shows that the light emitted from each display screen 1 passes through the polarizer 3, the electrically controlled wave plate 6 and the beam splitter lens 4 in sequence and then directly enters the human eye. During the transmission process, there is no multiple reflection in any optical film, thereby effectively avoiding the problem of light loss due to each reflection, thereby achieving high light efficiency. After measurement, it is determined that the light efficiency value can be greater than 80%, and the overall lightness and thinness are advantages, and the thickness can be less than 30mm; in addition, the technical solution of the present application can greatly improve the field of view angle, specifically the field of view angle can be increased to greater than 120°, thereby improving the imaging effect of the near-eye display system as a whole, which has important practicality and commercial value.

[0049] In addition, two-dimensional display can be achieved only by the cooperation of the lens group and the beam splitter lens, while three-dimensional display can be achieved by the cooperation of the lens group, polarizer, electrically controlled wave plate and beam splitter lens. Therefore, the design of this embodiment can realize the switching between two-dimensional display and three-dimensional display, thereby improving the applicability of the display device.

[0050] In a specific embodiment, the electrically controlled wave plate 6 is spaced apart or stacked with the polarizer 3 and the beam splitter lens 4 respectively; when the three are spaced apart, in one embodiment, the distance between the electrically controlled wave plate 6 and the polarizer 3 is equal to the distance between the electrically controlled wave plate 6 and the beam splitter lens 4. In order to avoid interference with the display caused by the part of the light emitted through the lens group 2 that is not collimated light, in one embodiment, the spacing between the polarizer 3 and the lens group 2 is minimized as much as possible, thereby ensuring that the light emitted through the lens group 2 directly enters the polarizer 3; of course, the spacing between the polarizer 3 and the lens group 2 cannot be infinitely reduced. In order to avoid the polarizer 3 being compressed and deformed, the gap is pre-selected to be greater than 0.1 mm; in order to further reduce the volume of the display device, in one embodiment, the three are stacked, that is, the electrically controlled wave plate 6, the polarizer 3 and the beam splitter lens 4 are all set to a planar structure, and the three planes are compounded into a layer. The thickness of the composite layer is less than or equal to 5 mm, thereby ensuring that the overall display device is lightweight while ensuring the seam elimination effect.

[0051] According to one embodiment of the present application, the electrically controlled wave plate 6 is set to a half wave plate or a quarter wave plate; in a specific embodiment, when the electrically controlled wave plate 6 is set to a half wave plate, the half wave plate will be set in parallel with the polarizer 3. At this time, the light passing through the polarizer 3 is circularly polarized light, and then changes its rotation direction after being modulated by the half wave plate. Specifically, at the first moment, the polarizer 3 only allows right-handed circularly polarized light to be emitted. At this time, since the half wave plate is in the closed state, the right-handed circularly polarized light will continue to be emitted into the beam splitter lens 4. Similarly, at the second moment, the polarizer 3 Plate 3 only allows right-handed circularly polarized light to be emitted. At this time, since the half-wave plate is in the open state, the right-handed circularly polarized light will change its rotation direction under the action of the half-wave plate and become left-handed circularly polarized light to be emitted into the beam splitter lens 4; in another specific embodiment, when the electrically controlled wave plate 6 is set as a quarter-wave plate, the quarter-wave plate will be set parallel to or perpendicular to the polarizer 3. At this time, the linearly polarized light is emitted through the polarizer 3, which will be modulated into circularly polarized light through the quarter-wave plate and its rotation direction will be changed. The specific adjustment process is the same as the above, so it will not be described in detail here.

[0052] According to one embodiment of the present application, in order to achieve a three-dimensional display effect, that is, to ensure that light of different depths of field can be incident on the adjustment lens 5, in one embodiment, the aperture of the adjustment lens 5 is equal to the center distance between each two adjacent display screens 1; that is, when only two-dimensional display is required, each adjustment lens 5 only needs to be set at the connection between the two adjacent beam splitting lenses 4 corresponding to it; and when three-dimensional display is required, each adjustment lens 5 needs to be set at the connection between the two adjacent beam splitting lenses 4 corresponding to it, while ensuring that the aperture of the adjustment lens 5 is equal to the center distance between each two adjacent display screens 1. In other words, at this time, each adjustment lens 5 will cover half of the area of ​​the two adjacent beam splitting lenses 4.

[0053] According to one embodiment of the present application, the distance d between the adjustment lens 5 and the beam splitting lens 4 is:

[0054]

[0055] Wherein, a is the aperture of the adjustment lens 5; b is the aperture of the display screen 1; and α is the angle between the two beams emitted through the beam splitting lens.

[0056] The specific geometric relationship is as follows Figure 2 As shown, the bottom edge is the half aperture of the adjustment lens 5, that is, a / 2, the upper edge is half the length of the side of the display screen 1, that is, b / 2, and the angle between the vertical edge and the hypotenuse is the half beam splitting angle. In other words, half of the angle between the two beams emitted through the beam splitting lens 4 is α / 2, and the vertical edge is the distance d between the adjustment lens 5 and the beam splitting lens 4. The above parameters can be preset according to the size of the display device.

[0057] Each embodiment in this specification is described in a progressive manner. Some embodiments focus on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other.

[0058] It should be noted that, in the specification and claims of this application and the above-mentioned drawings, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or specific order or precedence between these entities or operations. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein.

[0059] Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, or any other variants thereof, are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also includes other elements not expressly listed or that are inherent to such process, method, article, or apparatus. For example, a process, method, system, product, or apparatus that includes a list of steps or units is not necessarily limited to those steps or units expressly listed but may include other steps or units not expressly listed or that are inherent to such process, method, product, or apparatus. In the absence of further limitations, an element limited by the phrase "comprising a . . . ." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0061] The above is only a specific embodiment of the present application, so that those skilled in the art can understand or implement the present application. Various modifications and variations to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied for herein.

Claims

1. A display device, characterized in that: include: At least two display screens are spliced ​​together, and at least a lens group and a beam splitting lens are sequentially arranged along the light emitting direction of each of the display screens; the device also includes: at least one adjustment lens, the orthographic projection of the adjustment lens based on the display screen covering the partial orthographic projections of two adjacent beam splitting lenses based on the display screen, so that light rays in different directions emitted through each two adjacent beam splitting lenses are all incident on the same adjustment lens, and the corresponding optical paths of light rays in different directions partially overlap.

2. The display device according to claim 1, wherein The display screen includes a plurality of pixel islands arranged in an array.

3. The display device according to claim 2, wherein: The lens group is configured as a cylindrical lens array.

4. The display device according to claim 2, wherein: The aperture of the adjustment lens is equal to the center distance between each two adjacent display screens.

5. The display device according to claim 1, wherein A polarizer and an electrically controlled wave plate are sequentially arranged between the lens group and the beam splitting lens along the light emitting direction.

6. The display device according to claim 5, wherein: The beam splitting lens covers the orthographic projection of the polarizer based on the display screen based on the orthographic projection of the display screen.

7. The display device according to claim 3, wherein: The ratio between the thickness of each lens in the lens group and its aperture is greater than or equal to 5.

8. The display device according to claim 4, wherein: The distance d between the adjustment lens and the beam splitting lens is: Wherein, a is the aperture of the adjustment lens; b is the aperture of the display screen; and α is the angle between the two beams of light emitted through the beam splitting lens.

9. The display device according to claim 2, wherein: The aperture of each lens in the lens group is equal to the size of each pixel island.

10. The display device according to claim 5, wherein The electrically controlled wave plate is spaced apart from or stacked with the polarizer and the beam splitter lens respectively.

11. The display device according to claim 5, wherein The electrically controlled wave plate covers the orthographic projection of the polarizer based on the display screen based on the orthographic projection of the display screen.

12. The display device according to claim 5, wherein The electrically controlled wave plate is configured as a half wave plate or a quarter wave plate.

Images