Display device

Abstract

The embodiment of the application discloses a display device. The display device comprises two optical machines arranged along a first direction, each optical machine comprising a display screen and an optical element, the display screen having a first side edge surface and a second side edge surface oppositely arranged along the first direction, the first side edge surface being close to another optical machine, and the optical element being located on the display side of the display screen; the optical element has a first profile and a second profile oppositely arranged along the first direction; wherein the main optical axis of the optical element passes through the display screen and is located on the side of the geometric center of the display screen close to another optical machine; and the minimum value of the distance between the first profile and the optical axis of the optical element is smaller than the minimum value of the distance between the second profile and the optical axis of the optical element. By arranging the inner side of the optical element as a special-shaped structure, the size of the optical element can be reduced under the condition that the observation point is at the same distance from the optical element and has the same horizontal field of view.

Description

Technical Field

[0001] This application relates to the field of displays, and more specifically to a display device. Background Technology

[0002] As people's demands for consumer electronics displays continue to rise, virtual / augmented reality display technology is attracting increasing attention. Virtual Reality (VR) offers a superior immersive experience and is gaining popularity among consumers. This highlights that the core essence of VR lies in immersion, and the key to achieving immersion is panoramic view. The Field of View (FOV) represents the panoramic angle seen and is a hallmark parameter reflecting core optical technology. For currently available VR products, the limiting factor for the VR field of view is the optical engine lens. To achieve a better field of view (larger FOV), methods generally involve shortening the distance between the observation point (eye) and the lens or increasing the lens size. However, the space for shortening the distance between the eye and the lens is limited; excessive reduction will affect wearing comfort, while an excessively large lens will increase the product's weight, impacting the user's visual experience. Summary of the Invention

[0003] This application provides a display device that can solve the problem that existing display devices cannot reduce the weight of the display device while achieving a large field of view.

[0004] This application provides a display device, including two optical engines arranged side by side along a first direction, each optical engine including:

[0005] The display screen has a first side surface and a second side surface disposed opposite to each other along the first direction, the first side surface being close to another of the optical engines;

[0006] An optical element is located on the display side of the display screen. The optical element is used to process the display image on the display screen and transmit it to the corresponding observation point. The optical element has a first profile and a second profile that are arranged opposite to each other along the first direction, with the first profile close to another optical engine.

[0007] Wherein, the principal optical axis of the optical element passes through the display screen and is located on the side of the display screen near the other optical engine at the geometric center of the display screen; the minimum distance between the first profile and the principal optical axis of the optical element is less than the minimum distance between the second profile and the principal optical axis of the optical element.

[0008] Optionally, in some embodiments of this application, the minimum distance between the first side surface and the principal optical axis of the optical element is less than the minimum distance between the second side surface and the principal optical axis of the optical element.

[0009] Optionally, in some embodiments of this application, the display screen has opposing third and fourth side surfaces along a second direction, the third side surface being connected between the first and second side surfaces, the fourth side surface being connected between the first and second side surfaces, and the second direction forming an angle with the first direction; a first notch is formed at the connection between the third side surface and the first side surface.

[0010] Optionally, in some embodiments of this application, the optical element has a third profile and a fourth profile disposed opposite to each other along the second direction; the third profile is connected between the first profile and the second profile, and the fourth profile is connected between the first profile and the second profile;

[0011] The minimum distance between the third profile and the principal optical axis of the optical element is less than the minimum distance between the second profile and the principal optical axis of the optical element; and / or,

[0012] The minimum distance between the fourth profile and the principal optical axis of the optical element is less than the minimum distance between the second profile and the principal optical axis of the optical element.

[0013] Optionally, in some embodiments of this application, a second notch is formed at the connection between the fourth side surface and the first side surface; and / or,

[0014] A third notch is formed at the connection between the fourth side surface and the second side surface; and / or,

[0015] A fourth notch is formed at the connection between the third side surface and the second side surface.

[0016] Optionally, in some embodiments of this application, the first contour, the second contour, the third contour, and the fourth contour are arc-shaped, and the curvatures of the first contour, the second contour, the third contour, and the fourth contour are all different.

[0017] Optionally, in some embodiments of this application, the first contour, the third contour, and the fourth contour are straight lines, the second contour is an arc, and the center of curvature of the second contour is located on the principal optical axis of the optical element; the first contour and the third contour are connected by an arc, and the first contour and the fourth contour are connected by an arc.

[0018] Optionally, in some embodiments of this application, the orthographic projection of the display screen onto the optical element is located within the optical element in the direction along the main optical axis of the optical element.

[0019] Optionally, in some embodiments of this application, the minimum distance between the fourth contour and the principal optical axis of the optical element is less than the minimum distance between the third contour and the principal optical axis of the optical element.

[0020] Optionally, in some embodiments of this application, the optical element has an optical center, and the main optical axis of the optical element passes through the optical center; the optical centers of the optical elements of the two optical engines form a first connecting line, and the geometric centers of the displays of the two optical engines form a second connecting line, with the first connecting line and the second connecting line being parallel.

[0021] The principal optical axis of the optical element passes through the second connecting line; or...

[0022] The principal optical axis of the optical element forms an angle with the second connecting line and does not intersect with it.

[0023] In this embodiment, the display device includes two optical engines arranged side-by-side along a first direction. Each optical engine includes a display screen and an optical element. The display screen has a first side surface and a second side surface arranged opposite to each other along the first direction. The first side surface is closer to the other optical engine. The optical element is located on the display side of the display screen and is used to process the displayed image on the display screen and transmit it to the corresponding observation point. The optical element has a first contour and a second contour arranged opposite to each other along the first direction. The first contour is closer to the other optical engine. The principal optical axis of the optical element passes through the display screen and is located on the side of the display screen near the other optical engine at the geometric center of the display screen. The minimum distance between the first contour and the principal optical axis of the optical element is less than the minimum distance between the second contour and the principal optical axis of the optical element. By setting the minimum distance between the first contour and the principal optical axis of the optical element to be less than the minimum distance between the second contour and the principal optical axis, this application makes the inner side of the optical element have an irregular structure. That is, when the distance between the observation point and the optical element is the same and the horizontal field of view is the same, the size of the optical element can be reduced, thereby reducing the weight of the display device and improving the user experience. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an existing display device;

[0026] Figure 2 This is a top view schematic diagram of an existing optical engine;

[0027] Figure 3This is a schematic diagram of the structure of a display device provided in an embodiment of this application;

[0028] Figure 4 This is a top view of an optical engine provided in an embodiment of this application;

[0029] Figure 5 This is a top view of another optical engine provided in an embodiment of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10. Display device;

[0032] 100, Optical mechanism; 110, 110a, Display screen; 111, First side surface; 112, Second side surface; 113, Third side surface; 114, Fourth side surface; 115, First notch; 116, Second notch; 117, Third notch; 118, Fourth notch; 120, 120a, Optical element; 121, First contour; 122, Second contour; 123, Third contour; 124, Fourth contour; 125, Arc; 130, Magnified image;

[0033] X, first direction; Y, second direction; O, O1, principal optical axis; P, P1, geometric center; Q, Q1, optical center; S, observation point; L, first connecting line; N, second connecting line. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0035] This application provides a display device, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments.

[0036] like Figure 3As shown, the display device 10 includes two optical engines 100 arranged side by side along the first direction X. When the display device 10 is put into use, the human eye corresponds to the two optical engines 100 respectively, and the position of the human eye corresponds to the observation point S of the optical engine 100. The first direction X is the distribution direction of the human eye, which is also the horizontal direction. The direction pointed to by the arrow in the first direction X is the distribution direction of the left eye and the right eye.

[0037] Each optical engine 100 includes a display screen 110 and an optical element 120, which can be composed of one or more lenses. The optical element 120 is located on the display side of the display screen 110, which displays images, and the optical element 120 processes the displayed images on the display screen 110 and transmits them to the corresponding observation point S. That is, when the display device 10 is in use, the displayed images on the display screen 110 are refracted or reflected by the optical element 120 to produce a magnified image 130 at a distance, which is then received by the human eye. The human eye views the magnified image 130 to achieve immersive vision.

[0038] like Figure 4 and Figure 5 As shown (the optical mechanism structure corresponding to the left eye), the display screen 110 has a first side surface 111 and a second side surface 112 arranged opposite to each other along the first direction X. The first side surface 111 is closer to the other optical mechanism 100, that is, the first side surface 111 is the inner side closer to the nose when the human eye observes, and the second side surface 112 is the outer side when the human eye observes. Correspondingly, the optical element 120 has a first contour 121 and a second contour 122 arranged opposite to each other along the first direction X. The first contour 121 is closer to the other optical mechanism 100. For the human eye, when observing, the position between the first side surface 111 and the first contour 121 is related to the inner edge of the magnified image 130 observed by the human eye, and the position between the second side surface 112 and the second contour 122 is related to the outer edge of the magnified image 130 observed by the human eye, thereby affecting the horizontal field of view of the human eye at the corresponding observation point S, and thus affecting the effect of immersive experience.

[0039] It should be noted that the outline mentioned in this application embodiment is the outer outline of the orthographic projection of the optical element 120 on the plane where the display screen 110 is located, and the first outline 121 corresponds to the first side surface 111 of the display screen 110, and the second outline 122 corresponds to the second side surface 112 of the display screen 110. That is, the first outline 121 is the inner side closer to the nose when viewed by the human eye, and the second outline 122 is the outer side when viewed by the human eye.

[0040] The principal optical axis O of the optical element 120 passes through the display screen 110 and is located on the side of the display screen 110 near the other optical engine 100, at the geometric center P of the display screen 110. It should be noted that the principal optical axis O or optical center Q of the optical element 120 is fixed after the optical element 120 is formed, regardless of whether the optical element 120 is subsequently cut into other shapes, while the geometric center P of the display screen 110 changes as the shape of the display screen 110 changes.

[0041] like Figure 1 and Figure 2 As shown, when both the display screen 110a and the optical element 120a are regular shapes and are assembled along the principal optical axis O1 of the optical element 120a, the geometric center P1 of the display screen 110a is located on the principal optical axis O1 of the optical element 120a. That is, the principal optical axis O1 of the optical element 120a passes through the optical center Q1 of the optical element 120a and the geometric center P1 of the display screen 110a. The dashed circle b represents the theoretical viewing angle range of a single optical engine 100 before irregular cutting. Figure 4 and Figure 5 As shown, under the same horizontal field of view, if the principal optical axis O of the optical element 120 is located on the side of the display screen 110 closer to the geometric center P of the display screen 110, that is, the geometric center P of the display screen 110 has shifted towards the second side surface 112, it indicates that the display screen 110 is misaligned relative to the optical element 120 in the first direction X, or the first side surface 111 of the display screen 110 has been cut, where the dashed circle a is the outer contour of the optical element 120 before the irregular cutting.

[0042] Correspondingly, the minimum distance between the first contour 121 and the principal optical axis O of the optical element 120 is less than the minimum distance between the second contour 122 and the principal optical axis O of the optical element 120, that is, the inner side of the optical element 120 is irregularly cut to form the first contour 121 (e.g. Figure 4 and Figure 5 The first contour 121 after the irregular cutting is located inside the dashed circle a), which allows the size of the optical element 120 to be reduced while keeping the horizontal field of view unchanged, thereby reducing the overall weight of the display device 10 and improving the user experience.

[0043] It should be noted that, for a single eye, the horizontal field of view (α / 2) refers to the angle between the two edges of the magnified image 130 formed by the display screen 110 after being magnified by the optical element 120 and the line connecting the human eye. For both eyes, the overall horizontal field of view refers to the sum of the angles between the outer edges of the magnified image 130 formed by the display screens 110 after being magnified by the corresponding optical elements 120 and the line connecting the human eye and the line connecting the outer edges of the magnified image 130 formed by the display screens 110 and the line connecting the line connecting the outer edges of the magnified image 130 to the human eye relative to the principal optical axis O of the optical element 120.

[0044] Furthermore, based on the characteristics of human vision, the area corresponding to the nose between the two eyes will obstruct the actual viewing angle to some extent. This obstructed part corresponds to the inner area of ​​the magnified image 130. Therefore, when the inner side of the optical element 120 is irregularly cut, although the field of view of the inner side of a single eye will be reduced, the overall horizontal field of view of both eyes remains unchanged, and will not have a significant impact on the overall immersive visual experience. At the same time, it can also reduce the overall weight of the display device 10. In other words, when the inner side of the optical element 120 is irregularly cut, its cutting size can be adjusted according to the obstruction of the viewing angle by the area corresponding to the nose, so as to avoid significantly affecting the user's immersive experience while reducing the size of the optical element 120.

[0045] In this embodiment, the display device 10 includes two optical engines 100 arranged side by side along a first direction X. Each optical engine 100 includes a display screen 110 and an optical element 120. The display screen 110 has a first side surface 111 and a second side surface 112 arranged opposite to each other along the first direction X. The first side surface 111 is close to the other optical engine 100. The optical element 120 is located on the display side of the display screen 110. The optical element 120 is used to process the display image of the display screen 110 and transmit it to the corresponding observation point S. The optical element 120 has a first contour 121 and a second contour 122 arranged opposite to each other along the first direction X. The principal optical axis O of the optical element 120 passes through the display screen 110 and is located on the side of the geometric center P of the display screen 110 close to the other optical engine 100. The minimum distance between the first contour 121 and the principal optical axis O of the optical element 120 is less than the minimum distance between the second contour 122 and the principal optical axis O of the optical element 120. This application sets the minimum distance between the first contour 121 of the optical element 120 and the main optical axis O to be less than the minimum distance between the second contour 122 and the main optical axis O, so that the inner side of the optical element 120 is cut into an irregular structure. That is, when the distance between the observation point S and the optical element 120 is the same and the horizontal field of view is the same, the size of the optical element 120 can be reduced, thereby reducing the weight of the display device 10 and improving the user experience. Conversely, with the same aperture corresponding to the optical element 120, a larger horizontal field of view can be achieved to improve the user's immersive visual experience.

[0046] Optional, such as Figure 4 and Figure 5 As shown, the minimum distance between the first side surface 111 of the display screen 110 and the principal optical axis O of the optical element 120 is less than the minimum distance between the second side surface 112 and the principal optical axis O of the optical element 120. That is to say, the inner side of the display screen 110 can also be irregularly shaped (e.g., ...). Figure 4 and Figure 5The first side surface 111 after the irregular cutting is at least partially located within the dashed circle b), so as to reduce the size of the display screen 110 while keeping the overall horizontal field of view unchanged, thereby reducing the weight of the display device 10, improving the user experience, and also improving the effective utilization rate of the display screen 110.

[0047] It should be noted that, since the overall horizontal field of view is related to the outer edge of the magnified image 130 formed after the display images of the two displays 110 are magnified by the corresponding optical elements 120, in order to ensure that the outer edges of the irregularly cut display screen 110 and the magnified image 130 formed by the optical elements 120 remain unchanged (e.g., Figure 4 and Figure 5 The second side surface 112 is always located outside the dotted circle b). In this embodiment, the inner sides of the display screen 110 and the optical element 120 are shaped to reduce the size of the optical element 120 and the display screen 110 while keeping the overall horizontal field of view unchanged.

[0048] Optional, such as Figure 4 As shown, the display screen 110 has a third side surface 113 and a fourth side surface 114 along the second direction Y. The third side surface 113 connects between the first side surface 111 and the second side surface 112, and the fourth side surface 114 connects between the first side surface 111 and the second side surface 112. The second direction Y forms an angle with the first direction X. It should be noted that the third side surface 113 is the lower side when viewed by the human eye, and the fourth side surface 114 is the upper side when viewed by the human eye. The second direction Y is the vertical direction when viewed by the human eye. For the human eye, when observing, the position of the third side surface 113 is related to the lower edge of the magnified image 130 observed by the human eye, and the position of the fourth side surface 114 is related to the upper edge of the magnified image 130 observed by the human eye, thus affecting the vertical field of view of the human eye at the corresponding observation point S.

[0049] A first notch 115 is formed at the connection between the third side surface 113 and the first side surface 111, that is, a first notch 115 is formed at the lower right corner corresponding to the observation area of ​​the human eye (left eye). Correspondingly, the optical element 120 can also be further irregularly cut at the position corresponding to the first notch 115. It should be noted that the area obstructed by the nose between the human eyes is also located at the lower right corner of the observation area of ​​the human eye (left eye). By forming a first notch 115 at this position, the invalid display area can be effectively removed, which can further reduce the size of the display screen 110, reduce the overall weight of the display device 10, improve the effective utilization rate of the display screen 110, and at the same time avoid significantly affecting the user's immersive experience.

[0050] In some embodiments, the first notch 115 can be formed by cutting at a 45° angle at the connection between the third side surface 113 and the first side surface 111, that is, the connecting surface formed by the first notch 115 is at a 145° angle to both the first side surface 111 and the third side surface 113. The cutting angle of the first notch 115 can be designed and adjusted according to the actual occlusion angle of the area between the eyes and corresponding to the nose, to ensure a better immersive experience for the user.

[0051] Optionally, the optical element 120 has a third profile 123 and a fourth profile 124 disposed opposite to each other along the second direction Y. The third profile 123 connects between the first profile 121 and the second profile 122, and the fourth profile 124 connects between the first profile 121 and the second profile 122. That is, the third profile 123 corresponds to the third side surface 113 of the display screen 110, and the fourth profile 124 corresponds to the fourth side surface 114 of the display screen 110. For the human eye, when observing, the position between the third side surface 113 and the third profile 123 is related to the lower edge of the magnified image 130 observed by the human eye, and the position between the fourth side surface 114 and the fourth profile 124 is related to the upper edge of the magnified image 130 observed by the human eye, thereby affecting the vertical field of view (β / 2) of the human eye at the corresponding observation point S, and thus affecting the effect of the immersive experience.

[0052] It should be noted that, based on the characteristics of human vision, in actual observation, the overall vertical field of view of the human eye is smaller than the horizontal field of view. That is, the entire field of view of the human eye is elliptical, which means that the upper and lower sides of the optical element 120 and / or the display screen 110 can be irregularly cut to maximize the utilization of the optical element 120 and / or the display screen 110.

[0053] In some embodiments, the minimum distance between the third contour 123 and the principal optical axis O of the optical element 120 is less than the minimum distance between the second contour 122 and the principal optical axis O of the optical element 120. That is, the lower side of the optical element 120 is irregularly cut to form the third contour 123 (e.g., Figure 4 and Figure 5 The third contour 123 after the irregular cutting is located inside the dashed circle a), which allows the optical engine 100 to have a sufficient vertical field of view, and the size of the optical element 120 can be further reduced, thereby reducing the overall weight of the display device 10 and improving the user experience.

[0054] Correspondingly, the third side surface 113 of the display screen 110, i.e. the lower side of the display screen 110, can also be cut (e.g. Figure 4 and Figure 5The third side surface 113 after the irregular cutting is at least partially located within the dashed circle b) to reduce the width of the upper and lower sides of the display screen 110, so that the size of the display screen 110 can be further reduced while the optical engine 100 has a sufficient vertical field of view, thereby improving the effective utilization rate of the display screen 110, reducing the overall weight of the display device 10, and improving the user experience.

[0055] In other embodiments, the minimum distance between the fourth contour 124 and the principal optical axis O of the optical element 120 is less than the minimum distance between the second contour 122 and the principal optical axis O of the optical element 120. That is, the upper side of the optical element 120 is irregularly cut to form the fourth contour 124 (e.g., Figure 4 and Figure 5 The fourth contour 124 after the irregular cutting is located inside the dashed circle a), which allows the optical engine 100 to have a sufficient vertical field of view, and the size of the optical element 120 can be further reduced, thereby reducing the overall weight of the display device 10 and improving the user experience.

[0056] Correspondingly, the fourth side surface 114 of the display screen 110, i.e. the upper side of the display screen 110, can also be cut (e.g. Figure 4 and Figure 5 The fourth side surface 114 after the irregular cutting is at least partially located within the dashed circle b) to reduce the width of the upper and lower sides of the display screen 110, so that the size of the display screen 110 can be further reduced while the optical engine 100 has a sufficient vertical field of view, thereby improving the effective utilization rate of the display screen 110, reducing the overall weight of the display device 10, and improving the user experience.

[0057] In some other embodiments, the minimum distance between the third contour 123 and the principal optical axis O of the optical element 120 is less than the minimum distance between the second contour 122 and the principal optical axis O of the optical element 120. Simultaneously, the minimum distance between the fourth contour 124 and the principal optical axis O of the optical element 120 is less than the minimum distance between the second contour 122 and the principal optical axis O of the optical element 120. That is, the upper and lower sides of the optical element 120 are irregularly shaped, allowing the optical engine 100 to have a sufficient vertical field of view while further reducing the size of the optical element 120, thereby reducing the overall weight of the display device 10 and improving the user experience.

[0058] Furthermore, the optical engine 100 has a lens barrel, and the display screen 110 and optical element 120 are all installed inside the lens barrel. When at least one of the third contour 123 and the fourth contour 124 of the optical element 120 and the first contour 121 are irregularly cut, and at least one of the third side surface 113 and the fourth side surface 114 of the display screen 110 and the first side surface 111 are irregularly cut, the size of the lens barrel used to install the display screen 110 and the optical element 120 can also be reduced, thereby reducing the size of the entire optical engine 100. This allows for the use of a smaller optical engine 100 with the same horizontal field of view, that is, a larger horizontal field of view can be obtained with the same size optical engine 100, thereby improving the user's immersive experience.

[0059] It should be noted that the relationship between the distance between the third contour 123 and the principal optical axis O of the optical element 120 and the distance between the fourth contour 124 and the principal optical axis O of the optical element 120, i.e. the specific shapes of the third contour 123 and the fourth contour 124, can be designed and adjusted according to the actual needs of the vertical field of view of the optical engine 100. As long as the user has a good immersive experience, no special restrictions are imposed here.

[0060] Optional, such as Figure 5 As shown, a second notch 116 is formed at the connection between the fourth side surface 114 and the first side surface 111. That is, a second notch 116 is formed at the upper right corner corresponding to the observation area of ​​the human eye (left eye), and this area corresponds to the inner side of the observation area of ​​the human eye (left eye) near the nose. Correspondingly, the optical element 120 can also be further irregularly cut at the position corresponding to the second notch 116. By forming the second notch 116 at the upper right corner of the display screen 110 and the optical element 120, neither the horizontal and vertical field of view of the optical engine 100 as a whole is affected, and the size of the display screen 110 and the optical element 120 can be further reduced, thereby improving the effective utilization rate of the display screen 110 and reducing the overall weight of the display device 10.

[0061] In some embodiments, such as Figure 3 As shown, a third notch 117 is formed at the connection between the fourth side surface 114 and the second side surface 112. That is, a third notch 117 is formed at the lower left corner corresponding to the human eye (left eye) observation area. Since this area corresponds to the outer side of the human eye (left eye) observation area, in order to avoid affecting the overall horizontal viewing angle, the irregularly cut third notch 117 is still located outside the dashed circle b. Correspondingly, the optical element 120 can also be further irregularly cut at the position corresponding to the third notch 117 to further reduce the size of the display screen 110 and the optical element 120, thereby improving the effective utilization rate of the display screen 110 and reducing the overall weight of the display device 10.

[0062] In other embodiments, such as Figure 3 As shown, a fourth notch 118 is formed at the connection between the third side surface 113 and the second side surface 112. That is, a fourth notch 118 is formed at the upper left corner corresponding to the human eye (left eye) observation area. Since this area corresponds to the outer side of the human eye (left eye) observation area, in order to avoid affecting the overall horizontal viewing angle, the irregularly cut fourth notch 118 is still located outside the dashed circle b. Correspondingly, the optical element 120 can also be further irregularly cut at the position corresponding to the fourth notch 118 to further reduce the size of the display screen 110 and the optical element 120, thereby improving the effective utilization rate of the display screen 110 and reducing the overall weight of the display device 10.

[0063] In some other embodiments, two or three of the following connections—the fourth side surface 114 and the first side surface 111, the fourth side surface 114 and the second side surface 112, and the third side surface 113 and the second side surface 112—are formed with notches. That is, two or three of the upper right, lower left, and upper left corners of the display screen 110 are formed with notches. When notches are formed at the lower right, upper right, lower left, and upper left corners of the display screen 110, the overall cross-section of the display side of the display screen 110 can be a regular octagon.

[0064] It should be noted that the position and specific shape of the notch on the display screen 110 can be designed and adjusted according to the overall field of view requirements of the optical engine 100. As long as the user's immersive experience requirements are guaranteed, the size of the display screen 110 and the corresponding optical element 120 can be reduced. No special restrictions are imposed here.

[0065] Optional, such as Figure 2 As shown, the first contour 121, the second contour 122, the third contour 123, and the fourth contour 124 can be arc-shaped, and the curvatures of the first contour 121, the second contour 122, the third contour 123, and the fourth contour 124 are all different. That is, the first contour 121, the third contour 123, and the fourth contour 124 can be irregularly cut with the orthographic projection of the corresponding first side surface 111, the third side surface 113, and the fourth side surface 114 on the optical element 120 as chords, so as to reduce the size of the optical element 120 while ensuring the effective utilization rate of the display screen 110. In addition, setting the first contour 121, the second contour 122, the third contour 123, and the fourth contour 124 as arc-shaped can also reduce the stress concentration generated during the irregular cutting process, thereby ensuring the optical stability and structural stability of the optical element 120.

[0066] It should be noted that the curvature of the first contour 121, the second contour 122, the third contour 123 and the fourth contour 124 can be designed according to the design requirements of the horizontal and vertical viewing angles and the shape of the display screen 110 after irregular cutting. It is only necessary to ensure that the arc design of the first contour 121, the second contour 122, the third contour 123 and the fourth contour 124 can meet the usage requirements of the viewing angle.

[0067] In some embodiments, such as Figure 3 As shown, the first contour 121, the third contour 123, and the fourth contour 124 are straight lines, while the second contour 122 is arc-shaped, with the center of curvature of the second contour 122 located on the principal optical axis O of the optical element 120. That is, the center of the arc-shaped projection of the second contour 122 in the direction of the principal optical axis O is on the principal optical axis O, and the projections of the first contour 121, the third contour 123, and the fourth contour 124 in the direction of the principal optical axis O are straight lines corresponding to the first side surface 111, the third side surface 113, and the fourth side surface 114. This irregular cutting method can further reduce the size of the optical element 120, thereby reducing the overall weight of the display device 10.

[0068] The first contour 121 and the third contour 123 are connected by an arc 125, and the first contour 121 and the fourth contour 124 are connected by an arc 125. That is, the first contour 121 and the third contour 123 are smoothly transitioned by an arc 125, and the first contour 121 and the fourth contour 124 are smoothly transitioned by an arc 125, so as to avoid stress concentration at the connection between the first contour 121 and the third contour 123 and the first contour 121 and the fourth contour 124 during the irregular cutting process, thereby ensuring the optical stability and structural stability of the optical element 120.

[0069] It should be noted that the specific shapes of the first contour 121, the second contour 122, the third contour 123 and the fourth contour 124 can be designed and adjusted according to the shape of the display screen 110 and the field of view requirements of the optical engine 100, and no special restrictions are imposed here.

[0070] Optionally, along the main optical axis O of the optical element 120, the orthographic projection of the display screen 110 onto the optical element 120 is located within the optical element 120; that is, the area enclosed by the first contour 121, the second contour 122, the third contour 123, and the fourth contour 124 of the optical element 120 surrounds the projection of the display screen 110 onto the optical element 120. This structural design helps to maximize the utilization of the display screen 110 under the same field of view.

[0071] In some embodiments, the minimum distance between the fourth contour 124 and the principal optical axis O of the optical element 120 is less than the minimum distance between the third contour 123 and the principal optical axis O of the optical element 120. Based on the characteristics of human vision, during actual observation, the upper viewing angle (corresponding to the fourth contour 124) is smaller than the lower viewing angle (corresponding to the third contour 123). By setting the minimum distance between the fourth contour 124 and the principal optical axis O of the optical element 120 to be less than the minimum distance between the third contour 123 and the principal optical axis O of the optical element 120, while ensuring a sufficient vertical field of view, the size of the optical element 120 can be further reduced, thereby reducing the overall weight of the display device 10.

[0072] Optionally, the optical element 120 has an optical center Q, the main optical axis O of the optical element 120 passes through the optical center Q, the optical centers Q of the optical elements 120 of the two optical engines 100 form a first connecting line L, and the geometric centers P of the display screens 110 of the two optical engines 100 form a second connecting line N. The first connecting line L and the second connecting line N are parallel, that is, the two optical engines 100 have the same irregular cutting method and are symmetrically arranged.

[0073] In this case, the main optical axis O of the optical element 120 passes through the second connecting line N, that is, the main optical axis O of the two optical elements 120 and the second connecting line N are located on the same plane. The upper and lower sides of the display screen 110 are not cut into irregular shapes or are cut into symmetrical irregular shapes. That is, the third contour 123 and the fourth contour 124 are set symmetrically. This setting method can simplify the irregular cutting method of the display screen 110 and also help improve the aesthetics of the display screen 110.

[0074] Alternatively, the principal optical axis O of the optical element 120 forms an angle with the second connecting line N and does not intersect. That is, the second connecting line N is parallel to the plane containing the principal optical axes O of the two optical elements 120. The top and bottom sides of the display screen 110 are either irregularly cut on one side or asymmetrically cut on both sides. In other words, the third contour 123 and the fourth contour 124 are asymmetrically set. This setting allows the third contour 123 and the fourth contour 124 to be optimized according to the characteristics of human vision, so as to maximize the utilization of the display screen 110 and the optical element 120 while meeting the viewing angle design requirements.

[0075] In some embodiments, in the observation direction along the first direction X, the sum of the field of view angles of the observation points S corresponding to the two optical engines 100 is greater than or equal to 120°. That is, after the display image of a single display screen 110 is magnified by the corresponding optical element 120, the angle between the outer edge of the magnified image 130 formed and the line connecting the observation point S and the optical element 120 is greater than or equal to 60°; after the display images of two display screens 110 are magnified by the corresponding optical element 120, the sum of the angles between the outer edge of the magnified image 130 formed and the line connecting the observation point S and the optical element 120 is greater than or equal to 120°, so as to provide the user with a better immersive experience.

[0076] Specifically, in the actual production process, the sum of the field of view angles of the observation points S corresponding to the two optical engines 100 along the observation direction X can be set to α = 120°, 125° or 130°, etc. The specific size of the sum of the field of view angles can be adjusted according to the actual use requirements. As long as the user's immersive experience needs are met, no special restrictions are imposed here.

[0077] In other embodiments, in the observation direction along the first direction X, the sum of the field of view angles of the observation points S corresponding to the two optical engines 100 is greater than or equal to 80°. That is, after the display image of a single display screen 110 is magnified by the corresponding optical element 120, the angle between the inner edge of the magnified image 130 formed and the line connecting the observation point S and the optical element 120 is greater than or equal to 40°; after the display images of two display screens 110 are magnified by the corresponding optical element 120, the sum of the angles between the inner edge of the magnified image 130 formed and the line connecting the observation point S and the optical element 120 is greater than or equal to 80°. The size of the sum of the field of view angles represents the size of the stereoscopic vision area. By setting the sum of the field of view angles to be greater than or equal to 80°, users can have a better immersive experience.

[0078] Specifically, in the actual production process, the merging angle of the field of view of the observation points S corresponding to the two optical engines 100 along the first direction X can be set to β = 80°, 90° or 100°, etc. The specific size of the merging angle can be adjusted according to the actual use requirements. As long as the user's immersive experience needs are met, no special restrictions are imposed here.

[0079] In some other embodiments, in the observation direction along the second direction Y, the field of view of the observation point S corresponding to the two optical engines 100 is greater than or equal to 90°. That is, after the display screen of a single display screen 110 is magnified by the corresponding optical element 120, the angle between the upper or lower edge of the magnified image 130 formed and the line connecting the observation point S and the principal optical axis O of the optical element 120 is greater than or equal to 45°; after the display screens of two display screens 110 are magnified by the corresponding optical element 120, the sum of the angles between the upper or lower edge of the magnified image 130 formed and the line connecting the observation point S and the principal optical axis O of the optical element 120 is greater than or equal to 90°, so as to provide the user with a better immersive experience.

[0080] Specifically, in the actual production process, the sum of the field of view angles of the observation points S corresponding to the two optical engines 100 along the observation direction Y can be set to 90°, 95° or 100°, etc. The specific size of the sum of the field of view angles can be adjusted according to the actual use requirements. As long as the user's immersive experience needs are met, no special restrictions are imposed here.

[0081] The above provides a detailed description of a display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display device, characterized in that, It includes two optical engines arranged side by side along a first direction, each of the optical engines comprising: The display screen has a first side surface and a second side surface disposed opposite to each other along a first direction, and a third side surface and a fourth side surface disposed opposite to each other along a second direction. The first side surface is close to another optical engine. The third side surface is connected between the first side surface and the second side surface. The fourth side surface is connected between the first side surface and the second side surface. The second direction forms an angle with the first direction. A first notch is formed at the connection between the third side surface and the first side surface. An optical element is located on the display side of the display screen. The optical element is used to process the display image on the display screen and transmit it to the corresponding observation point. The optical element has a first profile and a second profile that are arranged opposite to each other along the first direction, with the first profile close to another optical engine. Wherein, the principal optical axis of the optical element passes through the display screen and is located on the side of the display screen near the other optical engine at the geometric center of the display screen; the minimum distance between the first profile and the principal optical axis of the optical element is less than the minimum distance between the second profile and the principal optical axis of the optical element.

2. The display device according to claim 1, characterized in that, The minimum distance between the first side surface and the principal optical axis of the optical element is less than the minimum distance between the second side surface and the principal optical axis of the optical element.

3. The display device according to claim 1, characterized in that, The optical element has a third profile and a fourth profile disposed opposite to each other along the second direction; the third profile is connected between the first profile and the second profile, and the fourth profile is connected between the first profile and the second profile; The minimum distance between the third contour and the principal optical axis of the optical element is less than the minimum distance between the second contour and the principal optical axis of the optical element. And / or, The minimum distance between the fourth profile and the principal optical axis of the optical element is less than the minimum distance between the second profile and the principal optical axis of the optical element.

4. The display device according to claim 1, characterized in that, A second notch is formed at the connection between the fourth side surface and the first side surface; and / or, A third notch is formed at the connection between the fourth side surface and the second side surface; and / or, A fourth notch is formed at the connection between the third side surface and the second side surface.

5. The display device according to claim 3, characterized in that, The first contour, the second contour, the third contour, and the fourth contour are arc-shaped, and the curvatures of the first contour, the second contour, the third contour, and the fourth contour are all different.

6. The display device according to claim 3, characterized in that, The first contour, the third contour, and the fourth contour are straight lines, the second contour is an arc, and the center of curvature of the second contour is located on the principal optical axis of the optical element; the first contour and the third contour are connected by an arc, and the first contour and the fourth contour are connected by an arc.

7. The display device according to claim 1, characterized in that, Along the direction of the main optical axis of the optical element, the orthographic projection of the display screen onto the optical element is located within the optical element.

8. The display device according to claim 3, characterized in that, The minimum distance between the fourth contour and the principal optical axis of the optical element is less than the minimum distance between the third contour and the principal optical axis of the optical element.

9. The display device according to any one of claims 1 to 8, characterized in that, The optical element has an optical center, and the main optical axis of the optical element passes through the optical center; the optical centers of the optical elements of the two optical engines form a first line, and the geometric centers of the displays of the two optical engines form a second line, with the first line and the second line being parallel. The principal optical axis of the optical element passes through the second connecting line; or... The principal optical axis of the optical element forms an angle with the second connecting line and does not intersect with it.

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