Folding remote projection display equipment

Abstract

The invention discloses a folding remote projection display device, which comprises a display screen, a spectroscope and a curved surface reflector, and is characterized in that the display screen emits light to the direction of the spectroscope, at least part of the light is reflected to the curved surface reflector by the spectroscope, and after being reflected back to the spectroscope by the curved surface reflector, the light penetrates through the spectroscope and is emitted to an exit pupil position; the display screen is arranged on the display screen mounting bracket, and the display screen mounting bracket and the spectroscope are rotatably connected with one side of the curved reflector respectively; the display screen mounting bracket and the spectroscope can respectively rotate towards the direction close to the curved reflecting mirror to realize folding; moreover, the display screen mounting bracket and the spectroscope can respectively rotate in a direction far away from the curved reflector, and are kept at a preset position, so that imaging is realized. According to the folding type remote projection display device, the display screen and the spectroscope rotate relative to the curved surface reflector, switching between an opening state and a folding state is achieved, the packaging space can be reduced, the cost can be reduced, and transportation is convenient.

Description

Technical Field

[0001] The invention relates to a foldable long-distance projection display device. Background Art

[0002] In recent years, long-distance display devices have been promoted and applied in daily life as desktop office equipment or desktop reading equipment. Long-distance display devices can magnify the image of the built-in display screen to a position close to infinity, delaying the user's visual fatigue and achieving myopia prevention and control.

[0003] However, in order to achieve a large virtual image distance and a large virtual image size, existing desktop long-range display devices are generally large in size and require a large space during both storage and transportation, which is in conflict with the development trend of existing displays becoming increasingly thin and light. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a foldable long-range display device.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] A foldable telescopic display device comprises a display screen, a beam splitter and a curved reflector. The display screen emits light in the direction of the beam splitter, at least part of the light is reflected by the beam splitter to the curved reflector, and then reflected back to the beam splitter by the curved reflector, and then passes through the beam splitter and is emitted to the exit pupil position; wherein,

[0007] The display screen is arranged on a display screen mounting bracket, and the display screen mounting bracket and the beam splitter are rotatably connected to one side of the curved reflector respectively; the display screen mounting bracket and the beam splitter can be respectively rotated in a direction close to the curved reflector to achieve folding; and the display screen mounting bracket and the beam splitter can be respectively rotated in a direction away from the curved reflector and be maintained in a predetermined position to achieve imaging.

[0008] Preferably, a first support member is arranged between the beam splitter and the display screen mounting bracket; the first support member is rotatably connected to the beam splitter and detachably connected to the display screen mounting bracket; or, the first support member is detachably connected to the beam splitter and rotatably connected to the display screen mounting bracket.

[0009] Preferably, two second supporting members are arranged relatively between the beam splitter and the curved reflector; the shape of the second supporting members in the open state defines the open state of the display screen, the beam splitter and the curved reflector, and the part of the second supporting member close to the first side edge of the beam splitter is wider than the part close to the second side edge of the beam splitter.

[0010] Preferably, the second support member is a rigid support member, the second support member is rotatably connected to the beam splitter and detachably connected to the curved reflector, or the second support member is detachably connected to the beam splitter and rotatably connected to the curved reflector;

[0011] Alternatively, the second support member is a flexible and foldable support member, and two opposite sides of the second support member are respectively connected to the beam splitter and the curved reflector.

[0012] Preferably, a connecting member is further provided between the side of the beam splitter away from the display screen and the side of the curved reflector away from the display screen;

[0013] The connecting member is fixedly connected to the curved reflector, and the connecting member is rotatably connected to the beam splitter.

[0014] Preferably, the sum of the length of the short side of the display screen mounting bracket and the length of the short side of the first supporting member is greater than the distance between the first side edge of the beam splitter and the first side edge of the curved reflector in the open state.

[0015] Preferably, the curved reflector is a concave reflector, and the beam splitter and the display screen are arranged facing the concave surface; when folding, the beam splitter and the display screen are respectively rotated toward the concave surface of the curved reflector to achieve folding.

[0016] Preferably, in the folded state, the display screen is located between the beam splitter and the curved reflector.

[0017] Preferably, the foldable telescopic display device further comprises a positive lens arranged in the light emitting direction of the display screen, and the positive lens is a single lens or a lens combination.

[0018] Preferably, the foldable long-range display device further comprises a housing, wherein the housing at least encloses a surface of the curved reflector that is away from the beam splitter.

[0019] The foldable telescopic display device provided by the present invention comprises a display screen, a beam splitter and a curved reflector, wherein the display screen is arranged on a display screen mounting bracket, and the display screen mounting bracket and the beam splitter can be respectively rotated in a direction close to the curved reflector to achieve folding; and the display screen mounting bracket and the beam splitter can be respectively rotated in a direction away from the curved reflector and maintained at a predetermined position to achieve imaging. The foldable telescopic display device can realize switching between an open state and a folded state by rotating the display screen and the beam splitter relative to the curved reflector, thereby reducing packaging space, reducing costs, and facilitating storage and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1is a schematic diagram of the three-dimensional structure of the foldable telescopic display device provided by an embodiment of the present invention in an opened state;

[0021] Figure 2 is a front view schematic diagram of the foldable telescopic display device provided by an embodiment of the present invention in an opened state;

[0022] Figure 3 is a rear view schematic diagram of the foldable telescopic display device provided by an embodiment of the present invention in an opened state;

[0023] Figure 4 is a side view schematic diagram of the foldable telescopic display device provided by an embodiment of the present invention in an opened state;

[0024] Figure 5 is a side view schematic diagram of a folded state of a foldable telescopic display device provided by an embodiment of the present invention;

[0025] Figure 6 It is a front view schematic diagram of the folded state of the foldable long-distance projection display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] like Figure 1As shown, the foldable long-distance display device provided by the present invention includes a display screen (arranged on a display screen mounting bracket 1), a beam splitter 2 and a curved reflector 3; wherein the display screen is arranged facing the beam splitter 2, and the beam splitter 2 and the curved reflector 3 are arranged opposite to each other; when in use, the display screen emits light in the direction of the beam splitter 2, at least part of the light is reflected by the beam splitter 2 to the curved reflector 3, and is reflected back to the beam splitter 2 by the curved reflector 3, and then at least part of the light passes through the beam splitter 2 and is emitted to the exit pupil position for imaging. The foldable long-distance display device magnifies and projects the image on the display screen 2 through an optical magnification system, and presents it through the beam splitter 2. The user can view an enlarged virtual image of at least 3 meters away and at least 30 inches at the exit pupil position in front of the beam splitter 2, which enables the user to continue to see far during use.

[0030] In this embodiment, the beam splitter 2 uses a plane lens, and the surface of the plane lens is provided with a beam splitter film with a predetermined transmission-reflection ratio, such as a semi-transparent and semi-reflective film. According to the optical path design, the plane transparent surface can also be provided with other optical elements such as a polarizer and a quarter-wave plate; in combination with the specific optical path design, the beam splitter 2 can also use a curved beam splitter, which is not limited here. The curved reflector 3 is a concave reflector, and the display screen and the beam splitter 2 are respectively arranged toward the concave surface of the curved reflector 3; a reflective film with a reflectivity of more than 98% is arranged on the surface of the curved reflector 3, forming an effect of approximate total reflection. In order to achieve the magnification and long-distance projection of the image displayed on the display screen, a positive lens 6 can also be provided in the optical system. The positive lens 6 is arranged in the light emitting direction of the display screen. The positive lens 6 can be a single lens or a lens group. Preferably, the positive lens 6 is fixedly connected to the display screen mounting bracket 1.

[0031] In the above-mentioned foldable long-range display device, the display screen is arranged on the display screen mounting bracket 1, the display screen mounting bracket 1 and the beam splitter 2 are rotatably connected to the curved reflector 3 respectively, the display screen mounting bracket 1 is connected to the first side of the curved reflector 3, the beam splitter 2 is connected to the second side of the curved reflector 3, and the first side and the second side are two sides arranged oppositely; the display screen mounting bracket 1 and the beam splitter 2 can be respectively rotated in the direction close to the curved reflector 3 to achieve folding; and the display screen mounting bracket 1 and the beam splitter 2 can be respectively rotated in the direction away from the curved reflector 3 and be maintained in a predetermined position to achieve normal imaging after assembly; the rotation and position retention of the display screen mounting bracket 1 and the beam splitter 2 are achieved by the support and connecting members arranged between the display screen mounting bracket 1, the beam splitter 2 and the curved reflector 3.

[0032] Among them, Figure 1As shown, a first support member 4 is provided between the beam splitter 2 and the display screen mounting bracket 1 to realize the switching between the folding state and the opening state between the beam splitter 2 and the display screen mounting bracket 1; the first support member 4 may be a plate-shaped support member, one side of which is rotatably connected to the side of the beam splitter 2, and the other side is detachably connected to the side of the display screen mounting bracket 1; or, one side of the first support member 4 is detachably connected to the side of the beam splitter 2, and the other side is rotatably connected to the side of the display screen mounting bracket 1. The short side length of the first support member 4 depends on the angle between the beam splitter 2 and the display screen, the short side length of the display screen mounting bracket 1, and the short side length of the beam splitter 2, and the angle between the beam splitter 2 and the display screen is adjusted. When the wide side size of the beam splitter 2 is large enough and the size of the display screen mounting bracket is large enough, the first support member 4 may be a connecting member, and the beam splitter 2 and the display screen mounting bracket may be directly detachably connected through the first support member 4. The first support member 4 can fix the display screen that is rotated to a fixed angle relative to the curved reflector 3 and the beam splitter 2.

[0033] Two second support members 5 are arranged relatively between the beam splitter 2 and the curved reflector 3 to realize the switching between the folded state and the open state between the beam splitter 2 and the curved reflector 3. The second support member 5 can be a rigid, plate-shaped support member, one side of which is rotatably connected to the side of the beam splitter 2, and the other side is detachably connected to the side of the curved reflector 3; or, the second support member 5 is detachably connected to the side of the beam splitter 2 and rotatably connected to the side of the curved reflector 3. Alternatively, the second support member 5 can be a flexible, foldable support member, and the two opposite sides of the second support member 5 are fixedly connected to the side of the beam splitter 2 and the side of the curved reflector 3, respectively, and the switching between the open state and the folded state between the beam splitter 2 and the curved reflector 3 is realized by folding the second support member 5. The second support member 5 can fix the beam splitter 2 rotated to a fixed angle relative to the curved reflector 3.

[0034] The first support member 4 and the second support member 5 are used to realize the assembly, separation and rotation of the display screen mounting bracket 1 , the beam splitter 2 and the curved reflector 3 .

[0035] Since the side of the curved reflector 3 away from the display screen is arc-shaped, in order to realize the connection and rotation of the beam splitter 2 and the curved reflector 3 at this side position, a connecting member 6 is further provided between the side of the beam splitter 2 away from the display screen and the side of the curved reflector 3 away from the display screen; the connecting member 6 is fixedly connected to the side of the curved reflector 3, and the connecting member 6 is rotatably connected to the side of the beam splitter 2.

[0036] In the foldable long-range projection display device, by setting the beam splitter 2 and the display screen mounting bracket 1 in a rotatable form, and by setting the first support member 4 between the beam splitter 2 and the display screen mounting bracket 1, and setting the second support member 5 between the beam splitter 2 and the curved reflector 3, the rotation of the display screen and the beam splitter 2 relative to the curved reflector 3 is achieved, and the foldable long-range projection display device can be converted between an open state and a folded state, which can reduce the packaging space, reduce costs, and facilitate transportation.

[0037] After the foldable telescopic display device is assembled, the distance between the side of the beam splitter 2 close to the display screen and the side of the curved reflector 3 close to the display screen is greater than the distance between the side of the beam splitter 2 away from the display screen and the side of the curved reflector 3 away from the display screen.

[0038] In order to ensure the viewing comfort of human eyes, the horizontal field of view of the foldable telescopic display device is greater than the vertical field of view, the horizontal sides of the beam splitter 2 and the curved reflector 3 are all long sides, and the vertical sides are all short sides; the first support member 4 is used to realize the connection between the long side of the beam splitter 2 and the display screen mounting bracket 1; the two second support members 5 are used to realize the connection between the short side of the beam splitter 2 and the short side of the curved reflector 3, and the shape of the second support member 5 defines the opening state of the display screen, the beam splitter 2 and the curved reflector 3; wherein, when the foldable telescopic display device is in the opening state, the part of the second support member 5 close to the display screen is wider than the part away from the display screen, and the sum of the length of the short side of the display screen mounting bracket 1 and the length of the short side of the first support member 4 is greater than the distance between the side of the beam splitter 2 close to the display screen and the side of the curved reflector 3 close to the display screen in the opening state. On the premise that the second support member 5 defines the opening state of the beam splitter 2 and the curved reflector 3, the first support member 4 further constrains the setting position and setting angle of the display screen relative to the beam splitter 2, thereby adjusting the light emission mode of the display screen.

[0039] When folding the foldable telescopic display device, first, disassemble the detachable positions of each support member, and then rotate the display screen mounting bracket 1 and the beam splitter 2 toward the concave surface of the curved reflector 3 to achieve folding. In the folded state, the display screen is located between the beam splitter 2 and the curved reflector 3. The first support member 4 and the second support member 5 can be rotated toward the concave surface of the concave reflector 3 to achieve folding, or can be rotated away from the concave surface of the concave reflector 3 to achieve folding. Here, there is no restriction on the rotation direction of the first support member 4 and the second support member 5 and the fixing method after rotation.

[0040] When the folding action is completed, the foldable long-distance projection display device is transformed from a large-volume assembled form to a small-volume flat-plate folded form, and the volume is greatly reduced, making it easy to store and transport.

[0041] In order to fix the folded form of the foldable long-distance display device, preferably, second connecting members that cooperate with each other are respectively provided on the sides of the beam splitter 2 and the curved reflector 3 close to the display screen, so as to fix the side of the beam splitter 2 away from the connecting member 6 and the side of the curved reflector 3 away from the connecting member 6 when in the folded state, thereby fixing the folded form of the foldable long-distance display device into a stable form, which is convenient for storage when used at home.

[0042] In order to fix the foldable telescopic display device when in use and to protect the optical elements in the foldable telescopic display device, the foldable telescopic display device should also include a housing, which at least closes the surface of the curved reflector 3 away from the beam splitter 2. The housing can be a semi-enclosed shell, and the connecting member 6 can be a part of the housing. In the folded state, the housing can form a closed space with the beam splitter, and the display screen, the support member, etc. are all enclosed therein to achieve the protection requirements.

[0043] Below Figures 2 to 6 Taking the specific embodiment shown as an example, the structure of the foldable long-distance projection display device provided by the present invention and the conversion process of the foldable long-distance projection display device between the open state and the folded state are described in detail.

[0044] In the following, for ease of understanding, reference is made to Figure 1 , Figure 2 This orientation description is only for understanding and does not limit the structure or placement of the foldable telescopic display device.

[0045] Combination Figures 2 to 4 It can be seen that the foldable telescopic display device includes a display screen, a beam splitter 2 and a curved reflector 3. The display screen emits light in the direction of the beam splitter 2. At least part of the light is reflected by the beam splitter 2 to the curved reflector 3, and after being reflected back to the beam splitter 2 by the curved reflector 3, it passes through the beam splitter 2 and is emitted to the exit pupil position. The exit pupil position is located on the side of the beam splitter 2 away from the curved beam splitter 3. In this embodiment, the display screen is located at the top. The foldable telescopic display device can also be arranged and used in a manner where the display screen is located at the bottom after being rotated.

[0046] like Figure 2 As shown, the beam splitter 2 includes a first side and a second side (i.e., an upper side 21 and a lower side 22) relative to each other, and a third side and a fourth side (i.e., a left side 23 and a right side 24) relative to each other; the upper side 21 and the lower side 22 correspond to the long side of the beam splitter 2, and the left side 23 and the right side 24 correspond to the short side of the beam splitter 2.

[0047] like Figure 3As shown, the first side 31 , the second side 32 , the third side 33 and the fourth side 34 of the curved reflector 3 correspond to the first side 21 , the second side 22 , the third side 23 and the fourth side 24 of the beam splitter 2 , respectively.

[0048] The display screen is arranged on the display screen mounting bracket 1 , and the first side edge (lower side edge) of the display screen mounting bracket 1 is rotatably connected to the first side edge (upper side edge 31 ) of the curved reflector 3 .

[0049] A connector 6 is provided between the second side edge (lower side edge 32) of the curved reflector 3 and the second side edge (lower side edge 22) of the beam splitter 3; the connector 6 is fixedly connected to the second side edge 22 of the curved reflector 3, and the connector 6 is rotatably connected to the second side edge 22 of the beam splitter 2.

[0050] A first support member 4 is provided on the first side edge (upper side edge 21) of the beam splitter 2, and a lower side edge 41 of the first support member 4 is rotatably connected to the upper side edge 21 of the beam splitter 2 and can rotate around the first side edge 21 of the beam splitter 2; a side edge 42 of the first support member 4 away from the beam splitter 2 is detachably connected to the second side edge (upper side edge) of the display screen mounting bracket 1.

[0051] The third side and the fourth side of the beam splitter 2 ( Figure 2 The left side 23 and the right side 24 shown in the figure are respectively provided with a second support member 5, the second support member 5 is rotatably connected to the beam splitter 2, and the side of the second support member 5 away from the beam splitter 2 and the corresponding side of the curved reflector 3 (i.e. Figure 3 The right side 33 and the left side 34 are shown to be detachably connected.

[0052] In this embodiment, the portion of the second support member 5 close to the first side 21 of the beam splitter is wider than the portion close to the second side 22 of the beam splitter; the length of the short side of the display screen mounting bracket 1 (i.e. Figure 4 The length of the short side of the first support member 4 (i.e. Figure 4 The sum of the lengths parallel to the paper surface) is greater than the distance between the first side edge 21 of the beam splitter 2 and the first side edge 31 of the curved reflector 3 when in the open state.

[0053] The first support member 4 is connected to the display screen mounting bracket 1, and the second support member 5 is connected to the curved reflector 3 to realize the assembly of the display screen, the beam splitter 2 and the curved reflector 3; the shape of the second support member 5 defines the open state of the display screen, the beam splitter 2 and the curved reflector 3, that is, the normal imaging use state. The relative position of the beam splitter 2 and the curved reflector 3 is constrained by the second support member 5; on this basis, the first support member 4 further constrains the position of the display screen relative to the beam splitter 2 and the curved reflector 3.

[0054] When the foldable telescopic display device needs to be folded, the first support member 4 and the display screen mounting bracket 1 are separated, the second support member 5 and the curved reflector 3 are separated, and the beam splitter 2 and the display screen are respectively rotated toward the concave surface of the curved reflector 3 to achieve folding. In the folded state, the display screen is located between the beam splitter 2 and the curved reflector 3.

[0055] During the folding process, the first support member 4 and the second support member 5 are rotated and folded relative to the beam splitter 2 toward the side away from the curved reflector 3, or the first support member 4 and the second support member 5 are rotated relative to the beam splitter 2 toward the side close to the curved reflector 3. When the first support member 4 and the second support member 5 are rotated and folded relative to the beam splitter 2 toward the side away from the curved reflector 3, it is necessary to consider the fixation of the first support member 4 and the second support member 5 after folding. When the first support member 4 and the second support member 5 are rotated relative to the beam splitter 2 toward the side close to the curved reflector 3, the first support member 4 and the second support member 5 are folded between the beam splitter 2 and the curved reflector 3. At this time, it is necessary to consider the interference between the first support member 4, the second support member 5 and the display screen mounting bracket 1 in the folded state to avoid damage to the display screen, the beam splitter 2 and the curved reflector 3.

[0056] like Figure 5 and Figure 6 As shown, in this embodiment, the first support member 4 and the second support member 5 are respectively rotatably connected to the beam splitter 2, the first support member 4 is detachably connected to the display screen mounting bracket 1, and the second support member 5 is detachably connected to the curved reflector 3. When folded, the first support member 4 and the second support member 5 are respectively rotated to the side away from the curved reflector 3, so that the plate-shaped first support member 4 and the second support member 5 can be fitted with the outer plane of the beam splitter 2, which is convenient for folding and fixing, and can prevent the first support member 4 and the second support member 5 from causing damage to the display screen and the curved reflector 3.

[0057] Preferably, in order to fix the foldable long-distance projection display device after being folded, a second connecting piece that cooperates with each other is also provided on the first side edge 21 of the beam splitter 2 and the first side edge 31 of the curved reflector 3 to achieve fixation between the first side edge 21 of the beam splitter 2 and the first side edge 31 of the curved reflector 3 when in the folded state.

[0058] In summary, the foldable telescopic display device provided by the present invention comprises a display screen, a beam splitter and a curved reflector, wherein the display screen is arranged on a display screen mounting bracket; the display screen mounting bracket and the beam splitter are rotatably connected to the curved reflector respectively and can rotate relative to the curved reflector, the display screen mounting bracket and the beam splitter can respectively rotate in a direction close to the curved reflector to achieve folding; and the display screen mounting bracket and the beam splitter can respectively rotate in a direction away from the curved reflector and remain in a predetermined position to achieve imaging. The foldable telescopic display device can realize switching between an open state and a folded state by rotating the display screen and the beam splitter relative to the curved reflector, thereby reducing packaging space, reducing costs, and facilitating storage and transportation.

[0059] The above is a detailed description of a foldable telescopic display device provided by the present invention. For those skilled in the art, any obvious changes made to the present invention without departing from the essence of the present invention will constitute an infringement of the patent right of the present invention and will bear corresponding legal responsibilities.

Claims

1. A foldable telescopic display device, comprising a display screen, a beam splitter and a curved reflector, wherein the display screen emits light in the direction of the beam splitter, at least part of the light is reflected by the beam splitter to the curved reflector, and after being reflected back to the beam splitter by the curved reflector, the light passes through the beam splitter and is emitted to the exit pupil position; characterized in that: The display screen is arranged on a display screen mounting bracket, and the display screen mounting bracket and the beam splitter are rotatably connected to one side of the curved reflector respectively; the display screen mounting bracket and the beam splitter can be respectively rotated in a direction close to the curved reflector to achieve folding; and the display screen mounting bracket and the beam splitter can be respectively rotated in a direction away from the curved reflector and be maintained in a predetermined position to achieve imaging.

2. The foldable long-distance display device according to claim 1, characterized in that: A first support member is provided between the beam splitter and the display screen mounting bracket; The first support member is rotatably connected to the beam splitter and is detachably connected to the display screen mounting bracket; Alternatively, the first support member is detachably connected to the beam splitter and rotatably connected to the display screen mounting bracket.

3. The foldable telescopic display device according to claim 2, characterized in that: Two second supporting members are arranged opposite to each other between the beam splitter and the curved reflector; The shape of the second support member in the open state defines the open state of the display screen, the beam splitter and the curved reflector, and a portion of the second support member close to the first side of the beam splitter is wider than a portion close to the second side of the beam splitter.

4. The foldable long-distance display device according to claim 3, characterized in that: The second support member is a rigid support member, the second support member is rotatably connected to the beam splitter and detachably connected to the curved reflector, or the second support member is detachably connected to the beam splitter and rotatably connected to the curved reflector; Alternatively, the second support member is a flexible and foldable support member, and two opposite sides of the second support member are respectively connected to the beam splitter and the curved reflector.

5. The foldable long-distance display device according to claim 3, characterized in that: A connecting piece is also provided between the side of the beam splitter away from the display screen and the side of the curved reflector away from the display screen; The connecting member is fixedly connected to the curved reflector, and the connecting member is rotatably connected to the beam splitter.

6. The foldable telescopic display device according to claim 3, characterized in that: In the open state, the sum of the length of the short side of the display screen mounting bracket and the length of the short side of the first supporting member is greater than the distance between the first side of the beam splitter and the first side of the curved reflector.

7. The foldable telescopic display device according to claim 1, characterized in that: The curved reflector is a concave reflector, and the beam splitter and the display screen are arranged facing the concave surface; when folding, the beam splitter and the display screen are respectively rotated toward the concave surface of the curved reflector to achieve folding.

8. The foldable telescopic display device according to claim 7, characterized in that: In the folded state, the display screen is located between the beam splitter and the curved reflector.

9. The foldable long-distance display device according to claim 1, characterized in that: It also includes a positive lens arranged in the light emitting direction of the display screen, and the positive lens is a single lens or a lens combination.

10. The foldable long-distance display device according to claim 1, characterized in that: The invention also comprises a shell, wherein the shell at least closes a surface of the curved reflector which is away from the beam splitter.

Images