Display device

Abstract

Display device (10), wherein two optical devices (100) are arranged parallel along a first direction (X), each optical device (100) comprising the following: a screen (110) with a first side surface (111) and a second side surface (112) arranged opposite each other along the first direction (X), wherein the first side surface (111) is located near the other optical device (100); an optical element (120) located on the display side of the screen (110), wherein the optical element (120) is used to process the display image of the screen (110) and to transmit it to a corresponding observation point (S); wherein the optical element (120) has a first contour (121) and a second contour (122) arranged opposite each other along the first direction (X), the first contour (121) being close to the other optical device (100); wherein the principal optical axis (O) of the optical element (120) passes through the screen (110) and is located on the side of the geometric center (P) of the screen (110) near the other optical device (100), wherein the minimum value of the distance of the first contour (121) from the principal optical axis (O) of the optical element (120) is less than the minimum value of the distance of the second contour (122) from the principal optical axis (O) of the optical element (120), wherein the optical element (120) has a third contour (123) and a fourth contour (124) which are arranged opposite each other along a second direction (Y); wherein the third contour (123) is connected between the first contour (121) and the second contour (122) and the fourth contour (124) is connected between the first contour (121) and the second contour (122), wherein the first contour (121), the second contour (122), the third contour (123) and the fourth contour (124) are curved and the first contour (121), the second contour (122), the third contour (123) and the fourth contour (124) each have different curvatures.

Description

TECHNICAL AREA

[0001] The present application relates to the field of display and in particular to a display device. STATE OF THE ART

[0002] As consumer expectations for consumer electronics displays continue to rise, virtual / augmented reality display technology is gaining increasing attention. Virtual reality (VR) offers a more immersive experience and is increasingly favored by consumers. It's clear that the core of virtual reality lies in the feeling of immersion, and the key to achieving this is the panoramic view. The field of view (FOV) represents the angle of the panoramic view seen and is the embodiment of the core optical landmark parameters. In VR products currently on the market, the factor that limits the VR field of view is the lens of the optical device.To obtain a better field of view (larger FOV), the distance between the point of observation (eyes) and the lens is usually shortened or the lens is enlarged, but there are only limited possibilities for shortening the distance between the eyes and the lens; and excessive reduction impairs the wearer's comfort, while a lens that is too large increases the weight of the product, which impairs the viewing experience.

[0003] From JP 2019-179083 A, a display device with two display elements corresponding to the left and right eyes of a viewer is known. The display device further comprises two eyepieces arranged symmetrically.

[0004] From US patent 2019 / 0079299 A1, a VR display device is known that comprises a display element and an asymmetric lens arranged in front of the viewer's eye. The asymmetric lens is designed to emit light from a picture element to an observation point, wherein the asymmetric lens has a boundary surface in the side of the observer's nose within a region of its effective lens diameter.

[0005] From US patent 2023 / 0096847 A1, a display device is known comprising a lighting device, a display panel, a memory unit, and a correction circuit. The display panel includes a display area opposite a light-emitting area. The memory unit stores data from a pixel matrix associated with the display sections. The memory stores positional data of pixels that are not opposite the corresponding light-emitting areas and deviation data when a positional error occurs between the light-emitting area and the display area. The correction circuit verifies the storage of the pixel data. REVELATION OF THE INVENTION OVERVIEW OF THE INVENTION

[0006] Embodiments of the present application provide a display device according to claim 1 which can solve the problem that existing display devices are unable to reduce the weight of the display device while simultaneously achieving a large field of view.

[0007] Embodiments of the present application provide a display device comprising two optical devices arranged parallel along a first direction, each optical device comprising: a screen with a first side surface and a second side surface arranged opposite each other along the first direction, the first side surface being located near the other optical device; an optical element located on the display side of the screen, wherein the optical element is used to process the display image of the screen and to transmit it to a corresponding observation point; wherein the optical element has a first contour and a second contour arranged opposite each other along the first direction, the first contour being close to the other optical device; wherein the principal optical axis of the optical element passes through the screen and is located on the side of the geometric center of the screen near the other optical device; wherein the minimum value of the distance of the first contour from the principal optical axis of the optical element is less than the minimum value of the distance of the second contour from the principal optical axis of the optical element.

[0008] Optionally, in some embodiments of the present application, the minimum value of the distance of the first side surface from the principal optical axis of the optical element is smaller than the minimum value of the distance of the second side surface from the principal optical axis of the optical element.

[0009] Optionally, in some embodiments of the present application, the screen has a third side surface and a fourth side surface opposite each other along a second direction, wherein the third side surface is connected between the first side surface and the second side surface, wherein the fourth side surface is connected between the first side surfaces and the second side surfaces, the second direction being at an angle to the first direction; wherein the third side surface has a first notch at a connection with the first side surface.

[0010] The optical element has a third contour and a fourth contour arranged opposite each other along the second direction; the third contour is coupled between the first contour and the second contour, and the fourth contour is coupled between the first contour and the second contour; and a minimum value of a distance of the third contour from an optical principal axis of the optical element is less than a minimum value of a distance of the second contour from the optical principal axis of the optical element.

[0011] Optionally, in some embodiments of the present application, the optical element has a third contour and a fourth contour arranged opposite each other along the second direction; wherein the third contour is connected between the first contour and the second contour and the fourth contour is connected between the first contour and the second contour; wherein the minimum value of the distance of the fourth contour from the principal optical axis of the optical element is less than the minimum value of the distance of the second contour from the principal optical axis of the optical element.

[0012] Optionally, in some embodiments of the present application, a second notch is formed at the junction of the fourth side surface and the first side surface.

[0013] Optionally, in some embodiments of the present application, a third notch is formed at the junction of the fourth side surface and the second side surface.

[0014] Optionally, in some embodiments of the present application, a fourth notch is formed at the junction of the third side surface and the second side surface.

[0015] Optionally, in some embodiments of the present application, the first notch forms a connecting surface which is at an angle of 135° to the first side surface.

[0016] Optionally, in some embodiments of the present application, the first notch forms a connecting surface which is at an angle of 135° to the third side surface.

[0017] Optionally, in some embodiments of the present application, the screen cross-section is an orthographic octagon.

[0018] The first contour, the second contour, the third contour and the fourth contour are curved, and the first contour, the second contour, the third contour and the fourth contour each have a different curvature.

[0019] Optionally, in some embodiments of the present application, the first contour, the third contour and the fourth contour are straight lines, wherein the second contour is curved and the center of curvature of the second contour lies on the principal optical axis of the optical element; wherein the first contour is connected to the third contour by an arc, and wherein the first contour is connected to the fourth contour by an arc.

[0020] Optionally, in some embodiments of the present application, an orthographic projection of the screen is arranged in a direction along the principal optical axis of the optical element on the optical element within the optical element.

[0021] Optionally, in some embodiments of the present application, the minimum value of the distance of the fourth side surface from the principal optical axis of the optical element is smaller than the minimum value of the distance of the third side surface from the principal optical axis of the optical element.

[0022] Optionally, in some embodiments of the present application, the optical element has an optical center and the principal optical axis of the optical element passes through the optical center; wherein the optical centers of the optical elements of the two optical devices form a first connecting line and the geometric centers of the screens of the two optical devices form a second connecting line, the first connecting line being parallel to the second connecting line; wherein the principal optical axis of the optical elements passes through the second connecting line.

[0023] Optionally, in some embodiments of the present application, the optical element has an optical center and the principal optical axis of the optical element passes through the optical center; wherein the optical centers of the optical elements of the two optical devices form a first connecting line and the geometric centers of the screens of the two optical devices form a second connecting line, the first connecting line being parallel to the second connecting line; wherein the principal optical axis of the optical elements is at an angle to the second connecting line and is not intersected by it.

[0024] Optionally, in some embodiments of the present application, the sum of the field-of-view angles from the observation point corresponding to the two optical devices is greater than or equal to 120° in the viewing direction along the first direction.

[0025] Optionally, in some embodiments of the present application, the convergence angle of the field of view from the observation point corresponding to the two optical devices is greater than or equal to 80° in one observation direction along the second direction.

[0026] Optionally, in some embodiments of the present application, the viewing angle from the observation point corresponding to the two optical devices is greater than or equal to 90° in the viewing direction along the second direction. BENEFICIAL EFFECTS

[0027] The display device in one embodiment of the present application comprises two optical devices arranged side by side along a first direction, each optical device comprising a screen and an optical element, the screen having a first side surface and a second side surface arranged opposite each other along the first direction, the first side surface being located near the other optical device, the optical element being located on the display side of the screen, the optical element being used to process a display image of the screen and transmit it to a corresponding viewing point; the optical element having a first contour and a second contour arranged opposite each other along the first direction X, the first contour being located near the other optical device;wherein a principal optical axis of the optical element passes through the screen and is located on the side of the geometric center of the screen near the other optical device;wherein a minimum value of the distance of the first contour from a principal optical axis of the optical element is smaller than a minimum value of the distance of the second contour from the principal optical axis of the optical element. In this application, the minimum value of the distance between the first contour of the optical element and the principal optical axis is set such that it is smaller than the minimum value of the distance between the second contour and the principal optical axis, so that the interior of the optical element has a specially shaped structure, that is, with the same distance between the observation point and the optical element and the same field of view angle, it is possible to reduce the size of the optical element, thereby reducing the weight of the display device and improving the user experience. PRESENTATION OF THE INVENTION

[0028] To illustrate the technical solution of the embodiments of the present application more clearly, the attached drawings, which are to be used in the embodiments, are briefly presented below, whereby it is easy to see that the following attached drawings only represent certain embodiments of the present application, whereby the person skilled in the industry can obtain further relevant accompanying drawings without creative work also on the basis of these attached drawings. Fig. Figure 1 is a schematic representation of the structure of an existing display device; Fig. Figure 2 is a schematic representation of a top view of an existing optical device; Fig. Figure 3 is a schematic representation of the structure of a display device provided by an embodiment of the present application; Fig. 4 is a schematic representation of a top-view structure of another optical device provided by an embodiment of the present application; Fig. Figure 5 is a schematic representation of a top-view structure of another optical device provided by embodiments of the present application. Reference symbol list:

[0029] 10. Display device; 100. optical device; 110, 110a. screen; 111. first side face; 112. second side face; 113. third side face; 114. fourth side face; 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; 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. SPECIFIC EXECUTION FORMS

[0030] The technical solutions in the embodiments of the application are clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the application. Naturally, the described embodiments represent only a subset of the embodiments of the application and do not constitute all of them. Based on the embodiments of the present application, all other embodiments that a person skilled in the art could achieve without inventive work fall within the scope of protection of the present application. Furthermore, it should be noted that the specific embodiments described here serve only to illustrate and explain the application and are not intended to limit its scope.Unless otherwise specified, in this application directional terms such as "top" and "bottom" are generally used to refer to the upper and lower parts of the device in its actual state of use or operation, in the direction of the drawing in the accompanying drawings, while "inside" and "outside" refer to the contours of the device.

[0031] Embodiments of the present application provide a display device as described in detail below. It should be noted that the order in which the following embodiments are described does not constitute a restriction of the preferred order of embodiments.

[0032] As in Fig. As shown in Figure 3, the display device 10 comprises two optical devices 100 arranged side by side along a first direction X. When the display device 10 is put into operation, the human eye corresponds to each of the two optical devices 100, and the position of the human eye corresponds to the observation point S of the optical devices 100. The first direction X is the direction of the human eye's distribution, i.e., the horizontal direction, and the direction indicated by the arrow of the first direction X is the direction of the distribution of the left and right eyes.

[0033] Each optical device 100 comprises a screen 110 and an optical element 120, the optical element 120 being able to include one or more lenses. The optical element 120 is located on the display side of the screen 110, the screen 110 being used to display an image, and the optical element 120 being used to process the displayed image from the screen 110 and transmit it to the corresponding observation point S. That is, when the display device 10 is used, a magnified image 130 is produced at a distance by refraction or reflection of the optical element 120 based on the displayed image from the screen 110, and this image is then received by the human eye; the human eye sees the magnified image 130, thus achieving immersive vision.

[0034] As in Fig. 4 and Fig. Figure 5 (structure of the optical device corresponding to the left eye) shows that the screen 110 has a first side surface 111 and a second side surface 112, which are arranged opposite each other along the first direction X. The first side surface 111 is located close to the other optical device 100; that is, the first side surface 111 is the inner side near the side of the nose when viewed by the human eye, and the second side surface 112 is the outer side of the human eye when viewed by the human eye. Accordingly, the optical element 120 has a first contour 121 and a second contour 122, which are arranged opposite each other along the first direction X, with the first contour 121 being located close to the other optical device 100.For the human eye, during observation, the position between the first side surface 111 and the first contour 121 refers 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 refers to the outer edge of the magnified image 130 observed by the human eye, thus influencing the horizontal viewing angle of the human eye at the corresponding observation point S and thus the effect of the immersive experience.

[0035] It should be noted that the contour referred to in the embodiment of the present application is the outer contour of the orthographic projection of the optical element 120 onto the plane in which the screen 110 is located, while the first contour 121 corresponds to the first side surface 111 of the screen 110 and the second contour 122 corresponds to the second side surface 112 of the screen 110, i.e. the first contour 121 is the side near the nose when viewed by the human eye, the inside of the screen 110, and the second contour 122 is the outside of the screen 110 when viewed by the human eye.

[0036] The principal optical axis O of the optical element 120 passes through the screen 110 and is located on the side of the geometric center P of the screen 110 near the other optical device 100. It should be noted that the principal optical axis O, or the optical center Q, of the optical element 120 is fixed after the optical element 120 has been manufactured and does not affect whether the subsequent optical element 120 is cut into different shapes or not, whereas the geometric center P of the screen 110 changes if the shape of the screen 110 changes.

[0037] As in the Fig. 1 and Fig. As shown in Figure 2, if the screen 110a and the optical element 120a are both regular shapes and are composited along the principal optical axis O1 of the optical element 120a, the geometric center P1 of the screen 110a lies on the principal optical axis O1 of the optical element 120a, i.e., 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 screen 110a, where the dashed circular line b is a theoretical range of viewing angles of the single optical device 100 before the shape cut. As shown in the Fig. 4 and Fig. 5 shown at the same horizontal field of view angle, when the principal optical axis O of the optical element 120 is on the side of the geometric center P of the screen 110 close to the other screen 110, i.e., the geometric center P of the screen 110 is shifted in the direction of the second side surface 112, that the screen 110 is misaligned with respect to the optical element 120 in the first direction X, or the screen 110 has been cut at the first side edge surface 111, where the dashed circle a is the outer contour of the optical element 120 before the cut.

[0038] Accordingly, the minimum value of the distance between the first contour 121 and the principal optical axis O of the optical element 120 is smaller than the minimum value of the distance between the second contour 122 and the principal optical axis O of the optical element 120, i.e., the inside of the optical element 120 is shaped and formed into the first contour 121 (as in Fig. 4 and Fig. 5 shown where the first contour 121 after the shape cut lies in the dashed circular line a), so that the size of the optical element 120 can be reduced at the constant horizontal viewing angle, thereby reducing the overall weight of the display device 10 and improving the user experience.

[0039] It should be noted that for a single eye, the horizontal field of view angle (α / 2) is the angle between the line connecting the human eyes and the edges of both sides of the magnified image 130, which is actually the display image of the single screen 110 after magnification by the optical element 120; for both eyes, the total horizontal field of view angle refers to the sum of the angles between the principal optical axis O of the optical element 120 and the line connecting the human eyes and the outer edge of the magnified image 130, which is formed on the basis of the display images of both screens 110 after magnification by the respective optical element 120.

[0040] Furthermore, according to the visual properties of the human eye, the area corresponding to the nose between the two eyes of the human body creates a certain blockage of the actual viewing angle, and the blockage part corresponds to the inner area of ​​the magnified image 130, therefore, if the inside of the optical element 120 is cut and shaped, although it will reduce the field of view of the inside of a single eye, the total horizontal field of view of both eyes remains unchanged and will not have a major impact on the overall immersive view, while simultaneously reducing the overall weight of the display device 10.This means that if a shaped cut is made on the inside of the optical element 120, the cut size can be adjusted according to the blockage of the viewing angle by the area corresponding to the nose, in order to avoid a major impact on the user's immersive experience while reducing the size of the optical element 120.

[0041] The display device 10 in this embodiment of the present application comprises two optical devices 100 arranged side by side along a first direction X, each optical device 100 comprising a screen 110 and an optical element 120, the screen 110 having a first side surface 111 and a second side surface 112 arranged opposite each other along the first direction X, the first side surface 111 being located near the other optical device 100, the optical element 120 being located on the display side of the screen 110, the optical element 120 being used to process a display image of the screen 110 and to transmit it to a corresponding observation point S;wherein the optical element 120 has a first contour 121 and a second contour 122 which are arranged opposite each other along the first direction X, wherein the principal optical axis O of the optical element 120 passes through the screen 110 and is located on the side of the geometric center P of the screen 110 near the other optical device 100;wherein a minimum value of a distance of the first contour 121 from a principal optical axis O of the optical element 120 is less than a minimum value of a distance of the second contour 122 from the principal optical axis O of the optical element 120. In this application, the minimum value of the distance between the first contour 121 of the optical element 120 and the principal optical axis O is set to be less than the minimum value of the distance between the second contour 122 and the principal optical axis O, so that the inside of the optical element 120 is cut into a specially shaped structure, that is, with the same distance between the observation point S and the optical element 120 or with the same horizontal field of view angle, it is possible to reduce the size of the optical element 120, thereby reducing the weight of the display device 10 and improving the user experience;On the contrary, with the same 120 optical element of the same caliber, it is possible to achieve a larger horizontal field of view angle to enhance the user's immersive visual experience.

[0042] Optional, as in Fig. 4 and Fig. As shown in Figure 5, the minimum distance between the first side surface 111 of the screen 110 and the principal optical axis O of the optical element 120 is smaller than the minimum distance between the second side surface 112 and the principal optical axis O of the optical element 120. This means that the inside of the screen 110 can also be shaped (as shown in Figure 5). Fig. 4 and Fig. 5 shown where the first side surface 111 after the contour cut lies at least partially within the dashed circle b), in order to reduce the size of the screen 110 while keeping the overall horizontal viewing angle unchanged, thereby reducing the weight of the display device 10, improving the user experience and also enabling a more effective utilization rate of the screen 110.

[0043] It should be noted that, since the entire horizontal field of view angle is related to the outer edge of the magnified image 130 formed by the screen of the two screens 110 after it has been magnified by the corresponding optical element 120, to ensure that the outer edge of the magnified image 130 formed by the screen 110 and the optical element 120 after the contour cutting remains unchanged (e.g. in the Fig. 4 and Fig. 5 where the second side surface 112 is always arranged outside the dashed circular line b), the embodiment of the present application mainly reduces the size of the optical element 120 and the screen 110 va by shaping the inside of the screen 110 and the optical element 120, while the overall horizontal viewing angle remains unchanged.

[0044] Optional, as in Fig. As shown in Figure 4, the screen 110 has a third side surface 113 opposite it and a fourth side surface 114 along the second direction Y. The third side surface 113 is connected between the first side surface 111 and the second side surface 112, and the fourth side surface 114 is connected between the first side surface 111 and the second side surface 112, with the second direction Y running at an angle to the first direction X. It should be noted that, as viewed by the human eye, the third side surface 113 is the bottom, the fourth side surface 114 is the top, and the second direction Y is the vertical.For the human eye, when performing the observation, the position of the third side surface 113 refers to the underside of the magnified image 130 observed by the human eye, and the position of the fourth side surface 114 affects the top of the magnified image 130 observed by the human eye, thereby influencing the vertical field of view angle of the human eye at the corresponding observation point S.

[0045] A first notch 115 is formed at the junction between the third side surface 113 and the first side surface 111, i.e., a human eye (left eye). A first notch 115 is formed in the corresponding lower right corner of the field of vision. Accordingly, the position of the optical element 120, corresponding to the first notch 115, can also be further formed.It should be noted that the blocking area corresponding to the nose between the two eyes of the human body is also located in the lower right corner position, which corresponds to the viewing area of ​​the human eye (left eye), and that by forming the first notch 115 at this position, the ineffective display area can be effectively removed, which can not only further reduce the size of the screen 110, decrease the overall weight of the display device 10 and improve the effective usage rate of the screen 110, but also avoid a greater impact on the user's immersive experience on a larger scale.

[0046] In some embodiments, the first notch 115 can be formed by cutting the third side surface 113 at an angle of 45° to the connection with the first side surface 111; that is, the first notch 115 forms a connecting surface that forms an angle of 135° with 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 coverage angle of the covering area, which corresponds to the angle between the eyes of the human body, in order to provide a better immersion experience for the user.

[0047] Optionally, the optical element 120 has a third contour 123 and a fourth contour 124, which are arranged opposite each other along the second direction Y. The third contour 123 is connected between the first contour 121 and the second contour 122, and the fourth contour 124 is connected between the first contour 121 and the second contour 122; that is, the third contour 123 corresponds to the third side surface 113 of the screen 110, and the fourth contour 124 corresponds to the fourth side surface 114 of the screen 110.For the human eye, during observation, the position between the third side surface 113 and the third contour 123 refers 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 contour 124 refers to the upper edge of the magnified image 130 observed by the human eye, thereby influencing the vertical field of view (β / 2) of the human eye at the corresponding observation point S, which in turn affects the effect of the immersive experience.

[0048] It should be noted that, according to the visual properties of the human eye, in the actual observation process the entire vertical field of view angle of the human eye is smaller than the horizontal field of view angle, i.e. the entire area of ​​the observational field of view of the human eye lies within an ellipse class, which means that it is possible to perform a contour cutting of the top and bottom surfaces of the optical element 120 and / or the screen 110 in order to achieve the maximum utilization of the optical element 120 and / or the screen 110.

[0049] In some embodiments, the minimum distance of the third contour 123 from the principal optical axis O of the optical element 120 is smaller than the minimum distance of the second contour 122 from the principal optical axis O of the optical element 120. That is, the underside of the optical element 120 is shaped and formed into a third contour 123 (as in Fig. 4 and Fig. 5 shown where the third contour 123 after the shape cut lies inside the dashed circle a), which makes it possible to further reduce the size of the optical element 120 if the optical device 100 has a sufficient vertical viewing angle, which in turn reduces the overall weight of the display device 10 and improves the user experience.

[0050] Accordingly, the third side surface 113 of the screen 110, i.e., the underside of the screen 110, can also be cut (e.g., after the contour cut, the third side surface 113 lies in the Fig. 4 and Fig. 5 at least partially within the dashed circle b), to reduce the width of the top and bottom of the screen 110, so that the size of the screen 110 can be further reduced if the optical device 100 has a sufficient vertical viewing angle, thereby increasing the effective utilization of the screen 110, reducing the overall weight of the display device 10 and improving the user experience.

[0051] In other embodiments, the minimum distance of the fourth contour 124 from the principal optical axis O of the optical element 120 is smaller than the minimum distance of the second contour 122 from the principal optical axis O of the optical element 120. That is, the top surface of the optical element 120 is shaped and formed into a fourth contour 124 (as in Fig. 4 and Fig. 5 shown where the fourth contour 124 after the shape cut lies inside the dashed circle a), which makes it possible to further reduce the size of the optical element 120 if the optical device 100 has a sufficient vertical viewing angle, which in turn reduces the overall weight of the display device 10 and improves the user experience.

[0052] Accordingly, the fourth side surface 114 of the screen 110, i.e., the top of the screen 110, can also be cut off (as in Fig. 4 and Fig. 5 shown where the fourth side surface 114 after the contour cut lies at least partially within the dashed circle b), so that the size of the screen 110 can be further reduced if the optical device 100 has a sufficient vertical viewing angle, thereby increasing the effective utilization of the screen 110, reducing the overall weight of the display device 10 and improving the user experience.

[0053] In further embodiments, the minimum distance of the third contour 123 from the principal optical axis O of the optical element 120 is smaller than the minimum distance of the second contour 122 from the principal optical axis O of the optical element 120, while the minimum distance of the fourth contour 124 from the principal optical axis O of the optical element 120 is smaller than the minimum distance of the second contour 122 from the principal optical axis O of the optical element 120. That is, the top and bottom surfaces of the optical element 120 are both die-cut, so that the size of the optical element 120 can be further reduced if the optical device 100 has a sufficient vertical field of view angle, thereby reducing the overall weight of the display device 10 and improving the user experience.

[0054] Furthermore, the optical device 100 has a mirror tube in which the screen 110 and the optical element 120 are mounted, and if at least one of the third contour 123 and the fourth contour 124 and the first contour 121 of the optical element 120 is subjected to a contour cut and at least one of the third side surface 113 and the fourth side surface 114 and the first side surface 111 of the screen 110 is subjected to a contour cut, the size of the mirror tube for mounting the screen 110 and the optical element 120 can also be reduced, thereby reducing the size of the entire optical device 100, which makes it possible to obtain a larger horizontal field of view with the same size of the optical device 100, and thereby improves the user's immersive experience.

[0055] It should be noted that the size ratio 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 adjusted in accordance with the actual needs of the vertical field of view angle of the optical device 100, and it is only necessary to ensure that the user has a better immersive experience, and no special restrictions are imposed here.

[0056] Optional, as in Fig. Figure 5 shows a second notch 116 being formed at the junction of the fourth side surface 114 and the first side surface 111. This second notch 116 is located in the upper right corner, corresponding to the field of view of the human eye (left eye), and this area corresponds to the inner surface of the human eye's (left eye's) field of view, near the area where the nose is located. Accordingly, the position of the optical element 120 corresponding to the second notch 116 can also be further shaped. By forming the second notch 116 in the upper right corner of the screen 110 and the optical element 120, neither the horizontal nor the vertical viewing angle of the optical device 100 is affected, and the size of the screen 110 and the optical element 120 can be further reduced, thereby increasing the effective utilization rate of the screen 110 and decreasing the overall weight of the display device 10.

[0057] In some embodiments, such as in Fig. As shown in Figure 3, a third notch 117 is formed at the junction of the fourth side surface 114 and the second side surface 112; that is, the third notch 117 is formed at the lower left corner, corresponding to the field of view of the human eye (left eye). Since the area corresponds to the outside of the field of view of the human eye (left eye) in order not to affect the overall horizontal viewing angle, the third notch 117 is still located outside the dashed circle b after the die-cutting process. Accordingly, the position of the optical element 120, corresponding to the third notch 117, can also be further die-cut to further reduce the size of the screen 110 and the optical element 120, thereby increasing the effective use of the screen 110 and reducing the overall weight of the display device 10.

[0058] In some embodiments, such as in Fig. As shown in Figure 3, a fourth notch 118 is formed at the junction of the third side surface 113 and the second side surface 112; that is, the fourth notch 118 is formed at the upper left corner, corresponding to the field of view of the human eye (left eye). Since this area corresponds to the outside of the field of view of the human eye (left eye) in order not to affect the overall horizontal viewing angle, the fourth notch 118 is still located outside the dashed circle b after the die-cutting process. Accordingly, the position of the optical element 120, corresponding to the fourth notch 118, can also be further die-cut to further reduce the size of the screen 110 and the optical element 120, thereby increasing the effective use of the screen 110 and reducing the overall weight of the display device 10.

[0059] In further embodiments, notches are formed at two or three below the junction between the fourth side surface 114 and the first side surface 111, the junction between the fourth side surface 114 and the second side surface 112, and the junction between the third side surface 113 and the second side surface 112; that is, notches are formed at two or three of the upper right corner, the lower left corner, and the upper left corner of the screen 110. If the lower right corner, the upper right corner, the lower left corner, and the upper left corner of the screen 110 are provided with notches, the overall cross-section of the display side of the screen 110 can have the shape of a regular octagon.

[0060] It should be noted that the position and specific shape of the notch formation on the screen 110 can be designed and adapted according to the requirements of the overall field of view of the optical device 100, and it is only necessary to ensure that the user has a better immersive experience and that the sizes of the screen 110 and the corresponding optical element 120 are reduced. No special restrictions are imposed here.

[0061] Optional, as in Fig. As shown in Figure 2, the first contour 121, the second contour 122, the third contour 123, and the fourth contour 124 can be curved, and each contour 121, the second contour 122, the third contour 123, and the fourth contour 124 can have different curvatures. That is, the first contour 121, the third contour 123, and the fourth contour 124 are able to be shaped to fit the chord of the orthographic projection of the corresponding first side surface 111, the third side surface 113, and the fourth side surface 114 onto the optical element 120, in order to ensure the effective use of the screen 110 while simultaneously reducing the size of the optical element 120.Furthermore, defining the first contour 121, the second contour 122, the third contour 123 and the fourth contour 124 as arcs can also reduce the stress concentration corresponding to the die-cutting process, thereby ensuring the optical stability and the structural stability of the optical element 120.

[0062] It should be noted that the curvature sizes 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 viewing angle and the vertical viewing angle as well as the shape of the screen 110 after the mold cutting, and it is only necessary to ensure that the curvature designs 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.

[0063] In some embodiments, such as in Fig. As shown in Figure 3, the first contour 121, the third contour 123, and the fourth contour 124 are straight lines, the second contour 122 is curved, and the center of curvature of the second contour 122 lies on the principal optical axis O of the optical element 120. That is, the arcuate projection of the second contour 122 in the direction of the principal optical axis O has the center of the circle 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 lateral surface 111, the third lateral surface 113, and the fourth lateral surface 114, respectively. Such a contour-cutting method can further reduce the dimensions of the optical element 120 to reduce the weight of the display device 10 as a whole.

[0064] The first contour 121 is connected to the third contour 123 by a circular arc 125, and the first contour 121 is connected to the fourth contour 124 by a circular arc 125, i.e., the first contour 121 assumes a smooth transition between the first contour 121 and the third contour 123 by a circular arc 125, and the first contour 121 assumes a smooth transition between the first contour 121 and the fourth contour 124 by a circular arc 125, in order to avoid the connection between the first contour 121 and the third contour 123 and the connection between the first contour 121 and the fourth contour 124 suffering from stress concentration during the die-cutting process, thereby ensuring the optical stability and structural stability of the optical element 120.

[0065] 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 adapted according to the shape of the screen 110 and the requirements for the viewing angle of the optical device 100, and are not specifically limited in this respect.

[0066] Optionally, the orthographic projection of the screen 110 onto the optical element 120 is located within the optical element 120 in the direction along the principal optical axis O of 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 screen 110 onto the optical element 120. This design helps to maximize the utilization of the screen 110 with the same field of view.

[0067] In some embodiments, the minimum value of the distance of the fourth contour 124 from the principal optical axis O of the optical element 120 is smaller than the minimum value of the distance of the third contour 123 from the principal optical axis O of the optical element 120.According to the visual properties of the human eye, in the actual observation process the viewing angle of the upper side of the human eye (corresponding to the fourth contour 124) is smaller than the viewing angle of the lower side (corresponding to the third contour 123). By setting the minimum value of the distance between the fourth contour 124 and the principal optical axis O of the optical element 120 to a value that is smaller than the minimum value of the distance between the third contour 123 and the principal optical axis O of the optical element 120, the vertical field of view angle can be further reduced, thereby decreasing the size of the optical element 120 and reducing the overall weight of the display device 10.

[0068] Optionally, the optical element 120 has an optical center Q and the principal optical axis O of the optical element 120 passes through the optical center Q; wherein the optical centers Q of the optical elements 120 of the two optical devices 100 form a first connecting line L and the geometric centers P of the screens 110 of the two optical devices 100 form a second connecting line N, wherein the first connecting line L is parallel to the second connecting line N, i.e., the profiles of the two optical devices 100 are identical and symmetrical.

[0069] The optical principal axis O of the optical element 120 passes through the second connecting line N, i.e., the optical principal axis O of the two optical elements 120 and the second connecting line N lie in the same plane, and the top and bottom surfaces of the screen 110 are not contour-cut or symmetrically contour-cut, i.e., the third contour 123 and the fourth contour 124 are arranged symmetrically, and this arrangement can simplify the contour cutting of the screen 110 and also help to improve the aesthetics of the screen 110.

[0070] Alternatively, the principal optical axis O of the optical element 120 is at an angle to the second connecting line N and does not intersect it, i.e., the second connecting line N is parallel to the plane in which the principal optical axes O of the two optical elements 120 are located, and only one side of the top and bottom surfaces of the screen 110 is designed to have a contour cut, or the two sides are contour cut asymmetrically, i.e., the third contour 123 and the fourth contour 124 are set up asymmetrically, and such a setup method makes it possible for the third contour 123 and the fourth contour 124 to be optimally designed according to the visual properties of the human body in order to achieve maximum use of the screen 110 and the optical element 120 while simultaneously meeting the design requirements of the viewing angle.

[0071] In some embodiments, the sum of the field-of-view angles from the observation point S, corresponding to the two optical devices 100, is greater than or equal to 120° in the viewing direction along the first direction X. That is, after the display image of the single screen 110 has been magnified by the corresponding optical element 120, the angle between the principal optical axis O of the optical element 120 and the line connecting the inside of the generated magnified image 130 and the observation point S is greater than or equal to 60°; after the display images of the two screens 110 have been magnified by the corresponding optical element 120, the angle between the principal optical axis O of the optical element 120 and the line connecting the inside of the generated magnified image 130 and the observation point S is greater than or equal to 120°, in order to provide the user with a better immersive experience.

[0072] In particular, during the actual production process, the sum of the field-of-view angles from observation point S, corresponding to the two optical devices 100 in the observation direction along the first direction X, can be set to α=120°, 125°, or 130°, etc., and the specific size of the sum of the field-of-view angles can be adjusted according to the needs of the actual use to meet the needs of the user's immersive experience, and there is no particular limitation here.

[0073] In other embodiments, the convergence angle of the field of view from observation point S, corresponding to the two optical devices 100, is greater than or equal to 80° in one observation direction along the first direction. That is, after the display image of the single screen 110 has been magnified by the corresponding optical element 120, the angle between the principal optical axis O of the optical element 120 and the line connecting the inside of the generated magnified image 130 and observation point S is greater than or equal to 40°; after the display images of the two screens 110 have been magnified by the corresponding optical element 120, the angle between the principal optical axis O of the optical element 120 and the line connecting the inside of the generated magnified image 130 and observation point S is greater than or equal to 80°.The size of the convergence angle represents the size of the three-dimensional field of view, and if the convergence angle is greater than or equal to 80°, the user can have a better immersive experience.

[0074] In particular, during the actual production process, the convergence angle of the field of view of the observation point S, corresponding to the two optical devices 100 in the observation direction along the first direction X, can be set to β=80°, 90°, or 100°, etc., and the specific size of the conjugate field of view can be adjusted according to the actual needs of the actual use of the corresponding settings, and it only needs to satisfy the user's needs for the immersive experience. There are no particular limitations here.

[0075] In a further embodiment, the field of view angle of the observation point S, corresponding to the two optical devices 100, is greater than or equal to 90° in one observation direction along the second direction. That is, after the display image of the individual screen 110 has been magnified by the corresponding optical element 120, the angle between the connecting line linking the top and bottom surfaces of the magnified image 130 and the observation point S, and the principal optical axis O of the optical element 120, is greater than or equal to 45°; and the sum of the connecting lines linking the display images of the two screens 110 and the observation point S is greater than or equal to 90°, thus providing the user with a better immersive experience.

[0076] Specifically, in the actual production process, the sum of the viewing angles from the observation point S, which corresponds to the two optical devices 100 in the observation direction along the second direction Y, can be set to 90°, 95° or 100° etc., and the specific size of the sum of the viewing angles can be adjusted according to the requirements of actual use and only needs to satisfy the user's needs for the immersive experience, and there is no particular restriction here.

[0077] The above is a detailed introduction to a display device provided in the embodiment of this application, and specific examples are used here to illustrate the principles and implementations of the present application. The description of the embodiments above is used only to aid understanding of the method of the present application and its core ideas. At the same time, for technical personnel in the field, there will be changes in the specific implementation method and scope of application as presented in this application. In conclusion, the content of this description is not to be understood as limiting this application.

Claims

[1] Display device (10) wherein two optical devices (100) are arranged parallel along a first direction (X), each optical device (100) comprising: a screen (110) with a first side surface (111) and a second side surface (112) arranged opposite each other along the first direction (X), wherein the first side surface (111) is located near the other optical device (100); an optical element (120) located on the display side of the screen (110), wherein the optical element (120) is used to process the display image of the screen (110) and to transmit it to a corresponding observation point (S); wherein the optical element (120) has a first contour (121) and a second contour (122) arranged opposite each other along the first direction (X), the first contour (121) being close to the other optical device (100); wherein the principal optical axis (O) of the optical element (120) passes through the screen (110) and is located on the side of the geometric center (P) of the screen (110) near the other optical device (100), wherein the minimum value of the distance of the first contour (121) from the principal optical axis (O) of the optical element (120) is less than the minimum value of the distance of the second contour (122) from the principal optical axis (O) of the optical element (120), wherein the optical element (120) has a third contour (123) and a fourth contour (124) which are arranged opposite each other along a second direction (Y); wherein the third contour (123) is connected between the first contour (121) and the second contour (122) and the fourth contour (124) is connected between the first contour (121) and the second contour (122), wherein the first contour (121), the second contour (122), the third contour (123) and the fourth contour (124) are curved and the first contour (121), the second contour (122), the third contour (123) and the fourth contour (124) each have different curvatures. [2] Display device (10) according to claim 1, wherein the minimum value of the distance of the first side surface (111) from the principal optical axis (O) of the optical element (120) is smaller than the minimum value of the distance of the second side surface (112) from the principal optical axis (O) of the optical element (120). [3] Display device (10) according to claim 1, wherein the screen (110) has a third side surface (113) and a fourth side surface (114) opposite each other along the second direction (Y), wherein the third side surface (113) is connected between the first side surface (111) and the second side surface (112), wherein the fourth side surface (114) is connected between the first side surface (111) and the second side surface (112), wherein the second direction (Y) is at an angle to the first direction (X); wherein the third side surface (113) has a first notch (115) at a connection with the first side surface (111). [4] Display device (10) according to claim 3, wherein the minimum value of the distance of the third contour (123) from the principal optical axis (O) of the optical element (120) is smaller than the minimum value of the distance of the second contour (122) from the principal optical axis (O) of the optical element (120) [5] Display device (10) according to claim 3, wherein the minimum value of the distance of the fourth contour (124) from the principal optical axis (O) of the optical element (120) is smaller than the minimum value of the distance of the second contour (122) from the principal optical axis (O) of the optical element (120). [6] Display device (10) according to claim 3, wherein a second notch (116) is formed at the connection point of the fourth side surface (114) and the first side surface (111). [7] Display device (10) according to claim 3, wherein a third notch (117) is formed at the connection point of the fourth side surface (114) and the second side surface (112). [8] Display device (10) according to claim 3, wherein a fourth notch (118) is formed at the junction of the third side surface (113) and the second side surface (112). [9] Display device (10) according to claim 3, wherein the first notch (115) forms a connecting surface at an angle of 135° to the first side surface (111). [10] Display device (10) according to claim 3, wherein the first notch (115) forms a connecting surface at an angle of 135° to the third side surface (113). [11] Display device (10) according to claim 3, wherein the screen cross-section is a regular octagon. [12] Display device (10) according to claim 1, wherein an orthographic projection of the screen (110) onto the optical element (120) is arranged within the optical element (120) in a direction along the principal optical axis (O) of the optical element (120). [13] Display device (10) according to claim 1, wherein the minimum value of the distance of the fourth contour (124) from the principal optical axis (O) of the optical element (120) is smaller than the minimum value of the distance of the third contour (123) from the principal optical axis (O) of the optical element (120). [14] Display device (10) according to claim 1, wherein the optical element (120) has an optical center (Q) and the principal optical axis (O) of the optical element (120) passes through the optical center (Q); wherein the optical centers (Q) of the optical elements (120) of the two optical devices (100) form a first connecting line (L) and the geometric centers (P) of the screens (110) of the two optical devices (100) form a second connecting line (N), wherein the first connecting line (L) is parallel to the second connecting line (N); wherein the principal optical axis (O) of the optical elements (120) passes through the second connecting line (N). [15] Display device (10) according to claim 1, wherein the optical element (120) has an optical center (Q) and the principal optical axis (O) of the optical element (120) passes through the optical center (Q); wherein the optical centers (Q) of the optical elements (120) of the two optical devices (100) form a first connecting line (L) and the geometric centers (P) of the screens (110) of the two optical devices (100) form a second connecting line (N), wherein the first connecting line (L) is parallel to the second connecting line (N); wherein the principal optical axis (O) of the optical elements (120) is at an angle to the second connecting line (N) and is not intersected by it. [16] Display device (10) according to claim 1, wherein the sum of the viewing angles (α / 2) from the observation point (S) corresponding to the two optical devices (100) is greater than or equal to 120° in the viewing direction along the first direction (X). [17] Display device (10) according to claim 1, wherein the convergence angle of the field of view angle (α / 2) from the observation point (S) corresponding to the two optical devices (100) is greater than or equal to 80° in one observation direction along the second direction (Y). [18] Display device (10) according to claim 1, wherein the viewing angle (α / 2) from the observation point (S) corresponding to the two optical devices (100) is greater than or equal to 90° in one viewing direction along the second direction (Y).

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