A display device

Abstract

The present invention relates to the field of display technology, and specifically to a display device, comprising: at least one lens; at least two display screens, located on both sides of at least one of the lenses, and inclined at a preset angle relative to the lenses; and a reflective device, located on the light-emitting side of the display screen, wherein the light emitted by at least two of the display screens is continuously arranged corresponding to the imaging surface on the reflective device, and the reflective device is used to reflect the light into the lens; in summary, the present application can eliminate the seams at the joints of two adjacent display screens after splicing through the cooperation of the above-mentioned structures, thereby avoiding the existence of black areas when the display enters the human eye, and ultimately achieving a seamless splicing display with a wide viewing angle.

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 object, the present invention provides a display device, comprising:

[0006] at least one lens;

[0007] At least two display screens are located on both sides of at least one of the lenses and are tilted relative to the lenses at a preset angle;

[0008] and a reflective device located on the light-emitting side of the display screen, wherein the light emitted by at least two of the display screens corresponds to an imaging surface on the reflective device and is continuously arranged, and the reflective device is used to reflect the light into the lens.

[0009] Optionally, at least two imaging surfaces have a first degree of overlap.

[0010] Optionally, the setting range of the first overlap is 5% to 10%.

[0011] Optionally, the imaging surfaces of at least two display screens on the light-emitting side of the lens have a second overlap, and the second overlap is less than or equal to 5%.

[0012] Optionally, the surface shape of the reflective device is set to be an aspherical surface or a free-form surface.

[0013] Optionally, the lens is configured as an aspheric lens.

[0014] Optionally, the reflective device covers the orthographic projection of at least one lens based on the display screen and the orthographic projections of at least two display screens based on the orthographic projection of the display screen.

[0015] Optionally, the display screen is provided in plurality, and the plurality of display screens are arranged at intervals on the periphery of the lens.

[0016] Optionally, the lens is provided in plurality, and the plurality of lenses are arranged between at least two of the display screens in a preset arrangement.

[0017] Optionally, the distance between the reflective device and the lens ranges from 20 mm to 50 mm.

[0018] Optionally, the aperture range of the lens is 50 mm to 70 mm.

[0019] Optionally, the lens is configured as a biconvex lens.

[0020] (2) Beneficial effects

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention provides a display device, comprising: at least one lens; at least two display screens, located on both sides of at least one of the lenses, and inclined relative to the lenses at a preset angle; and a reflective device, located on the light-emitting side of the display screen, wherein the light emitted by at least two of the display screens is continuously arranged corresponding to the imaging surface on the reflective device, and the reflective device is used to reflect the light into the lens; in summary, the present application can eliminate the seams at the joints of two adjacent display screens after splicing through the cooperation of the above-mentioned structures, thereby avoiding the existence of black areas when the display enters the human eye, and ultimately achieving seamless splicing display with a wide viewing angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] In order to more clearly illustrate the embodiments of the present invention 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:

[0025] Figure 1 is a schematic structural diagram of a display device according to one embodiment of the present invention;

[0026] Figure 2This is a schematic structural diagram showing the cooperation between a lens and multiple display screens in another embodiment of the present invention.

[0027] In the figure: 1. Lens; 2. Display screen; 3. Reflective device. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0029] 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 frame limitation of the display screen 2, a seam will be formed at the joint of two adjacent display screens 2 after splicing, thereby forming a certain size of display black area on the imaging surface, which in turn affects the display effect.

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0031] 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 2 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:

[0032] At least one lens 1; in a specific embodiment, the lens 1 is configured as an aspheric lens, wherein the aspheric lens has a better curvature radius and can maintain good aberration correction to obtain the required performance; and the present application can make the display device have excellent sharpness and higher resolution by adopting an aspheric design for the lens 1.

[0033] At least two display screens 2 are located on both sides of at least one lens 1 and are tilted relative to the lens 1 at a preset angle.

[0034] Specifically, 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 2 spliced ​​together. In theory, the more display screens 2 that are spliced ​​together, the larger the display field of view of the display device. The specific number is not specifically limited in this embodiment; in this embodiment, for ease of understanding, two display screens 2 are spliced ​​together as an example. That is to say, if the technical solution of the present application can eliminate the seam between the two display screens 2, then the seam between each adjacent two display screens 2 when multiple display screens 2 are spliced ​​can also be eliminated.

[0035] In a specific embodiment, two display screens 2 are provided, and one lens 1 is provided, and the two display screens 2 are correspondingly provided on both sides of the lens 1; in another specific embodiment, in order to obtain better image quality, in one embodiment, a plurality of display screens 2 are provided, and the plurality of display screens 2 are spaced apart and provided on the periphery of the lens 1. The periphery of the lens 1 refers to any position on the outer edge of the lens 1. That is, when two display screens 2 are provided, the two display screens 2 are correspondingly provided at two symmetrical positions on the outer edge of the lens 1. Similarly, when a plurality of display screens 2 are provided, the plurality of display screens 2 can be provided at any position on the outer edge of the lens 1. For specific arrangement, please refer to Figure 2 ; That is to say, in this embodiment, each display screen 2 is set at a preset angle to the lens 1, thereby ensuring that the multiple display screens 2 are all tilted toward the center direction of the lens 1; in addition, in this embodiment, the multiple display screens 2 can be set at equal intervals. Of course, the multiple display screens 2 can be set at unequal intervals, and the specific spacing parameters and setting methods can be pre-designed according to the requirements of the display device. This application does not make specific restrictions on the specific arrangement of the multiple display screens 2.

[0036] And a reflective device 3, which is located on the light-emitting side of the display screen 2. Specifically, the wall surface of the reflective device 3 facing the display screen 2 has a reflective surface. In one embodiment, the wall surface of the reflective device 3 facing the display screen 2 has a total reflection surface; the light emitted by at least two display screens 2 corresponds to the imaging surface on the reflective device 3 is continuously arranged, and the reflective device is used to reflect the light into the lens; in one embodiment, the reflective device 3 covers the orthographic projection of at least one lens 1 based on the display screen 2 and the orthographic projection of at least two display screens 2 based on the orthographic projection of the display screen 2. In other words, the size of the reflective device 3 is greater than or equal to the size of at least one lens 1 and the sum of the sizes of at least two display screens 2, so as to ensure that all the light emitted through the two display screens 2 enters the reflective device 3, and then passes through After reflection, all of them enter the lens 1; in one embodiment, the imaging surface of the light emitted by at least two display screens 2 on the reflective device 3 can be set in contact or have a first degree of overlap, as long as a seamless imaging surface can be formed on the reflective surface; in one embodiment, the spacing between the reflective device 3 and the lens 1 is in the range of 20mm to 50mm. The use of this parameter range can ensure that when the display device of the present application is applied to the near-eye display field, the light emitted by the display screen can be smoothly reflected into the lens through the reflective device without being reflected multiple times on the reflective surface of the reflective device. In summary, the design of this embodiment can ensure that the overall display device is lightweight, effectively reduce light loss, improve light efficiency, and ensure the effect of eliminating seams.

[0037] In one embodiment, the surface shape of the reflective device 3 can be set to an aspheric surface or a free-form surface; for example, when the surface shape of the reflective device 3 is set to an aspheric surface, the two display screens 2 are axially symmetrically arranged on both sides of the lens 1; and when the surface shape of the reflective device 3 is set to a free-form surface, since the free-form surface is a curved surface that changes freely in a complex manner, the two display screens 2 can be non-axisymmetrically arranged on both sides of the lens 1, wherein the shape of the free-form surface can be pre-designed according to the requirements of the display device, and then the specific arrangement of the two display screens 2 based on the lens 1 is designed according to the selected free-form surface; in summary, the present application adjusts the reflective surface shape of the reflective device 3 so that the light emitted through the two display screens 2 can all enter the aspheric lens after being reflected by the reflective device 3.

[0038] Specifically, such as Figure 1As shown, for ease of understanding, the display screen 2 arranged on the left side of the lens 1 is set as the first display screen 2, and the light emitted by the first display screen 2 is set as the first light. Similarly, the display screen 2 arranged on the right side of the lens 1 is set as the second display screen 2, and the light emitted by the second display screen 2 is set as the second light. More specifically, the first light emitted through the first display screen 2 first enters the reflective surface in the reflective device 3. At the same time, the second light emitted through the second display screen 2 will enter the reflective surface in the reflective device 3. At this time, the first light will form a first imaging surface on the reflective surface, and the second light will form a second imaging surface on the reflective surface. There is a first degree of overlap between the second imaging surface and the first imaging surface, thereby realizing the first display screen 2 and the second display screen. 2 is eliminated, and then the first light will be reflected by the reflecting surface and incident on the left area of ​​the lens 1. At the same time, the second light will be reflected by the reflecting surface and incident on the right area of ​​the lens 1. Finally, the first light forms a third imaging surface on the light-exiting side of the lens 1, and the second light forms a fourth imaging surface on the light-exiting side of the lens 1. In one embodiment, the third imaging surface and the fourth imaging surface are in contact with each other, or have a second overlap. However, in order to avoid the second overlap being too large, resulting in a smaller effective display area, in another embodiment, the second overlap value is set to be less than or equal to 5%; similarly, in order to avoid the first overlap being too large, resulting in a smaller effective display area, the setting range of the first overlap is 5% to 10%.

[0039] In one embodiment, the reflective device 3 is spaced apart from the lens 1 and the two display screens 2 through a mounting frame. The reflective device 3 and the lens 1 can be connected by an air medium, or the reflective device 3 and the lens 1 can be connected by a transparent medium layer, and the refractive index of the transparent medium layer is preferably close to or equal to the refractive index of the reflective device 3; more specifically, the two ends of the reflective device 3 are respectively fixedly connected to the mounting frame, or, in order to facilitate the installation and removal of the reflective device 3, the two ends of the reflective device 3 are respectively detachably connected to the mounting frame. In one embodiment, the end of the mounting frame away from the display screen 2 has a plurality of mounting positions, and the plurality of mounting positions are arranged at intervals. In one embodiment, the shape of the mounting position is adapted to the shape of the reflective device 3; in another embodiment, elastic locking parts are protruded from both ends of each mounting position. When the reflective device 3 is installed in the mounting position, the two ends of the reflective device 3 are stably installed in the mounting position under the action of the elastic locking parts; similarly, when the reflective device 3 needs to be repaired or replaced, it is only necessary to pull the reflective device 3 until the two ends of the reflective device 3 are separated from the two elastic locking parts.

[0040] In summary, the present application can eliminate the seams at the joints of two adjacent display screens 2 after splicing through the cooperation of the above structures, thereby avoiding the presence of black areas when entering the human eye display, and finally achieving seamless splicing display with a wide viewing angle; more specifically, refer again to Figure 1 It can be clearly seen from the optical path diagram shown that all the light emitted by each display screen 2 is incident on the reflective surface, and after being reflected once by the reflective surface, all enters the lens 1, without multiple reflections on the reflective surface, thereby effectively avoiding the problem of light loss due to each reflection, and thus 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.

[0041] In the aforementioned embodiment, when the lens 1 is set to an aspheric lens, the aperture of the aspheric lens should be greater than or equal to 30 mm. Exemplarily, the aperture range of the aspheric lens is 50 mm to 70 mm, thereby ensuring that during near-eye display, the light emitted by at least two display screens can all enter the lens 1 after being reflected by the reflective device, and form a complete picture on the light-emitting side of the lens 1, thereby improving the near-eye display efficiency; of course, the specific aperture of the aspheric lens is not specifically limited in this embodiment, and all fall within the scope of protection of this application.

[0042] In the aforementioned embodiment, the number of lenses 1 can be set to one, two or even more. When it is set to one, the structure of the display device is the simplest and the easiest to process, thereby achieving the elimination of the seams between each two adjacent display screens 2 through the simplest structural coordination; of course, the number of lenses 1 can be set to multiple, and multiple lenses 1 are arranged between at least two display screens 2 according to a preset arrangement. In a specific embodiment, multiple lenses 1 can be arranged in an array between at least two display screens 2; in another specific embodiment, multiple lenses 1 can be arranged at intervals along the light-emitting direction, thereby ensuring that the light reflected by the reflective device 3 is converged through multiple lenses 1 and finally enters the human eye, thereby achieving further elimination of seams; in summary, this embodiment adopts a design of setting the number of lenses 1 to multiple, which can effectively improve the resolution of the display device claimed to be protected by this application and improve the image quality; for ease of understanding, the following embodiments are all illustrated by taking the number of lenses 1 as one.

[0043] In the aforementioned embodiment, the lens 1 is configured as a plano-convex lens 1, and the curved side of the plano-convex lens 1 is located on the side away from the reflecting surface; in order to shorten the focal length between the reflecting surface and the lens 1, in one embodiment, the lens 1 is configured as a biconvex lens 1; in summary, this embodiment, by adding the design of the lens 1, can ensure that the light reflected by the reflecting surface can all pass through the lens 1 to converge the luminous angle; in addition, the aforementioned lens 1 can also be configured as an aspheric lens or a Fresnel lens 1, and the structure can be configured as a biconvex lens 1 or a plane lens 1. The shape and structure of the lens 1 given in the above embodiment are only shown for ease of understanding. In this embodiment, the shape and structure of the lens 1 are not specifically limited. As long as it can be ensured that the light incident into the lens 1 can form a non-spliced ​​imaging surface on the light-emitting side of the lens 1, design schemes that can achieve the above functions all fall within the scope of protection of this application.

[0044] In the aforementioned embodiment, at least two display screens 2 are respectively tilted relative to the lens 1 at a preset angle. This design can ensure that all light emitted through each display screen 2 can be incident on the reflective surface and have a first degree of overlap on the reflective surface. Theoretically, the smaller the angle between the display screen 2 and the lens 1, that is, the more the display screen 2 is tilted toward the lens 1, the higher the first degree of overlap of light emitted from each display screen 2 on the reflective surface. In other words, the larger the overlapping area of ​​the imaging surface formed on the light-emitting side of the lens 1, the better the effect of eliminating the splicing seam. However, in order to ensure a sufficiently large effective display area, the angle parameter between the display screen 2 and the lens 1 can be selected according to the value of the first degree of overlap. In this embodiment, no specific limitation is made to the specific selection process.

[0045] The present invention can be configured as a Micro-LED, LCD, or other OLED. In one embodiment, an OLED is provided. Depending on the function, it can be a conventional OLED, a transparent OLED, etc.; depending on the light-emitting principle, it can be RGB, a white light + color filter OLED, a quantum dot + OLED, etc. The present invention does not impose any particular limitation on the type.

[0046] According to one embodiment of the present application, in order to further improve the resolution, the display screen 2 in the aforementioned embodiment includes: a plurality of pixel islands arranged in an array, wherein each pixel island is equivalent to a small display screen 2, 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 island emitting red light will be referred to as a red pixel island, the pixel island emitting green light will be referred to as a green pixel island, and the pixel island emitting blue light will be referred to as a blue pixel island. The plurality of pixel islands in each display screen 2 can be divided into multiple groups, each group including a red pixel island, a green pixel island, and a blue pixel island. 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 can see the superimposed image; of course, each group can 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 2 emit four colors of light, and the combination of pixel islands in each group can be pre-set 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 2.

[0047] In addition, the display device also includes a lens 1 array, which is arranged on the light-emitting side of the display screen 2, and the multiple lenses 1 in the lens 1 array are arranged in a one-to-one correspondence with the multiple pixel islands; specifically, the apertures of the multiple lenses 1 in each lens 1 array are equal to the sizes of the multiple pixel islands in each display screen 2, thereby ensuring that the light emitted through each pixel island is emitted in the direction of the reflective device 3 after the luminous angle is converged by the corresponding lens 1, thereby improving the collimation of the emitted light.

[0048] In summary, the design of the lens 1 array in this embodiment can ensure that the light emitted through each pixel island can be converged at a luminous angle through the corresponding lens 1, thereby ensuring that the light incident on the reflective surface of the reflective device 3 is as collimated as possible, thereby improving the imaging effect and further improving the integrity of the display image during near-eye display.

[0049] According to multiple simulation verifications, the display device prepared using the design of this application can achieve a focal length of 45mm, a total device length of 35mm, a field of view angle of 120°, and an exit pupil distance of 8mm*8mm.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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 one lens; At least two display screens are located on both sides of the periphery of at least one of the lenses and are tilted relative to the lenses at a preset angle; and a reflective device located on the light-emitting side of the display screen, wherein the light emitted by at least two of the display screens corresponds to an imaging surface on the reflective device and is continuously arranged, and the reflective device is used to reflect all the light into the lens.

2. The display device according to claim 1, wherein At least two of the imaging surfaces have a first degree of overlap.

3. The display device according to claim 2, wherein: The setting range of the first overlap is 5% to 10%.

4. The display device according to claim 2, wherein: At least two of the display screens have a second overlap on imaging surfaces on the light-emitting side of the lens, and the second overlap is less than or equal to 5%.

5. The display device according to claim 1, wherein The surface shape of the reflector is set to be an aspherical surface or a free-form surface.

6. The display device according to claim 5, wherein: The lens is configured as an aspherical lens.

7. The display device according to claim 1, wherein The reflective device covers the orthographic projection of at least one lens based on the display screen and the orthographic projections of at least two display screens based on the orthographic projection of the display screen.

8. The display device according to claim 1, wherein The display screen is provided in a plurality, and the plurality of display screens are arranged at intervals on the periphery of the lens.

9. The display device according to claim 1, wherein The lenses are provided in plurality, and the plurality of lenses are arranged between at least two display screens in a preset arrangement.

10. The display device according to claim 1, wherein The distance between the reflector and the lens is in the range of 20 mm to 50 mm.

11. The display device according to claim 1, wherein The aperture range of the lens is 50mm~70mm.

12. The display device according to claim 1, wherein The lens is configured as a biconvex lens.

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