Portable display device

Abstract

The invention relates to a portable display device which comprises a shell, a short-focus projector, a rolling mechanism and a curtain, the short-focus projector is connected to the shell, the projection ratio of the short-focus projector is larger than 0.15 and smaller than 0.4, the rolling mechanism is connected to the shell, and the curtain is linked with the rolling mechanism to be driven to be switched between an unfolded state and a rolled state. The short-focus projector is used for projecting to the curtain in the unfolded state. According to the portable display equipment, the ultra-short-focus projector and the curtain are integrated into a whole, a user can project to the curtain in an unfolded state through the short-focus projector without configuring an independent curtain mounting bracket, and the trouble of mounting the curtain or selecting a projection wall surface can be avoided; the distance between the short-focus projector and the curtain can be set to be small so as to reduce the size of the whole equipment, the portability of the equipment is improved, meanwhile, a large-size picture can be projected to the curtain in an unfolded state, the equipment can be flexibly used in indoor, outdoor and vehicle-mounted environments and the like, and the use convenience and the user experience are improved.

Description

Technical Field

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

[0002] Small projectors, such as those for home use or portable devices, typically require a screen or wall for projection. This limitation limits the flexibility of these projectors. Outdoor use often requires a screen stand to support the unfolded screen, leaving room for improvement in usability. Summary of the Invention

[0003] An embodiment of the present invention provides a portable display device to improve the convenience of use.

[0004] A portable display device comprising:

[0005] case;

[0006] a short-throw projector connected to the housing, wherein the projection ratio of the short-throw projector is greater than 0.15 and less than 0.4;

[0007] a winding mechanism connected to the housing; and

[0008] The screen is linked with the reeling mechanism to be driven to switch between an extended state and a reeled state, and the short-throw projector is used for projecting onto the screen in the extended state.

[0009] In one embodiment, the shell includes a first end face and a second end face arranged opposite to each other in the screen width direction, and a peripheral side face connected between the first end face and the second end face, the light output area of ​​the short-focus projector is exposed to the peripheral side face, and the screen in the unfolded state is parallel to the screen width direction.

[0010] In one embodiment, the peripheral side surface includes a top surface and a bottom surface that are relatively arranged, and a first side surface and a second side surface connected between the top surface and the bottom surface. The light-emitting area is exposed to the top surface, and the curtain in the rolled-up state is closer to the second side surface than to the first side surface.

[0011] In one embodiment, the top surface is recessed to form a groove, the groove has an inclined wall parallel to the width direction of the screen and arranged at an angle to the screen in the unfolded state, and the light exit area is located on the inclined wall.

[0012] In one embodiment, the shell includes a middle frame, a panel covering the middle frame, and a light-emitting component assembled and fixed to the middle frame, the panel has the top surface, and the panel is provided with a mounting groove, the light-emitting component is embedded in the mounting groove and has the groove and the inclined wall.

[0013] In one embodiment, the portable display device includes a radiator and a speaker spaced apart along the width of the screen, the short-throw projector is arranged between the radiator and the speaker, the top surface, the bottom surface and the first side surface corresponding to the position of the radiator are respectively provided with a first air hole, and the top surface and the first side surface corresponding to the position of the speaker are respectively provided with a second air hole.

[0014] In one embodiment, the winding mechanism includes a motor connected to the shell, and a rotating drum linked to the output end of the motor, the motor is used to drive the curtain to switch between the unfolded state and the wound state through the rotating drum, and the curtain in the wound state is wound around the rotating drum.

[0015] In one embodiment, the rolling mechanism includes a support assembly connected to the shell and the screen. In the rolled-up state, the support assembly is folded and retracted into the shell. In the unfolded state, the support assembly is opened on the side of the screen away from the short-throw projector.

[0016] In one embodiment, the support assembly includes two groups of connecting rod assemblies, each group of the connecting rod assemblies includes a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected to the shell, the other end of the first connecting rod is rotatably connected to one end of the second connecting rod, and the other end of the second connecting rod is rotatably connected to the edge of the curtain; in the retracted state, the second connecting rod is stacked on the first connecting rod, and in the unfolded state, the two groups of the connecting rod assemblies are arranged opposite to each other.

[0017] In one embodiment, the portable display device includes two suspension members connected one-to-one to opposite ends of the shell, and the suspension members are used to be suspended to an external support; when the screen switches from a rolled-up state to an unfolded state, the screen assists in pulling the connecting rod assembly to open under the action of gravity.

[0018] The above portable display device includes a shell, a short-throw projector, a winding mechanism and a screen. The short-throw projector is connected to the shell, and the projection ratio of the short-throw projector is greater than 0.15 and less than 0.4. The winding mechanism is connected to the shell, and the screen is linked to the winding mechanism to be driven to switch between the unfolded state and the wound state. The short-throw projector is used to project onto the unfolded screen. The portable display device of the present application integrates the ultra-short-throw projector and the screen into a whole, and the screen is linked to the winding mechanism to be driven to switch between the unfolded state and the wound state. When the screen is in the wound state, the appearance of the entire device can be relatively simple, easy to carry and transport. Users do not need to configure an independent screen mounting bracket to project onto the unfolded screen through the short-throw projector. Combined with the design that the projection ratio of the short-throw projector is greater than 0.15 and less than 0.4, the distance between the short-throw projector and the screen can be set to be smaller to reduce the volume of the entire device, while improving the portability of the device and being able to project a large-sized picture onto the unfolded screen. Moreover, the portable display device of the present application can avoid the trouble of installing a screen or selecting a projection wall, and can also avoid the trouble of installing a screen bracket in an outdoor environment. It can be used flexibly in indoor, outdoor, car and other environments, thereby improving the convenience of use and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of a portable display device according to an embodiment of the present invention showing a screen in a rolled-up state;

[0021] Figure 2 A schematic diagram of a portable display device according to an embodiment of the present invention showing a screen in an unfolded state;

[0022] Figure 3 An exploded view of a portable display device according to an embodiment of the present invention, showing a screen in an unfolded state;

[0023] Figure 4 for Figure 2 A schematic diagram of another perspective of the portable display device with the screen in an unfolded state;

[0024] Figure 5 for Figure 2 A schematic diagram of another perspective of the portable display device with the screen in an unfolded state;

[0025] Figure 6This is a schematic diagram of a portable display device with some structures removed according to an embodiment.

[0026] Reference numerals:

[0027] Portable display device 10, housing 100, groove 100a, inclined wall 100b, first air hole 100c, second air hole 100d, first end surface 101, second end surface 102, peripheral side surface 103, top surface 1031, bottom surface 1033, first side surface 1035, second side surface 1037, middle frame 110, panel 120, mounting slot 120a, light output member 130, short-throw projector 200, light output area 201, winding mechanism 300, motor 310, rotating drum 320, supporting assembly 330, connecting rod assembly 331, first connecting rod 3311, second connecting rod 3313, screen 400, circuit board 500, decorative part 600, limit member 700, suspension member 800, radiator 910, speaker 920. DETAILED DESCRIPTION

[0028] The following detailed description of the preferred embodiment is a preferred mode of implementing the present invention. This description is not intended to be limiting. It is provided for the purpose of illustrating the general principles of the present invention.

[0029] It should be understood that, to facilitate understanding of the present invention, the terms "mounted," "connected," "coupled," and "mounted" in the following description refer to the connection relationships shown in the accompanying drawings. For example, "connected" can refer to a permanent connection or a removable connection. Furthermore, "connected" can also refer to a direct connection, an indirect connection, or connection via other auxiliary components. Therefore, the above terms should not be limited to the actual connections between the various elements of the present invention.

[0030] It should be understood that the terms "length," "width," "top," "bottom," "front," "rear," "left," "right," "vertical," "horizontal," "upper," "lower," "outer," and "inner" refer to orientations or positioning relationships in the accompanying drawings to facilitate understanding of the present invention, and do not limit the actual positions or orientations of the present invention. Therefore, the above terms should not limit the actual positions of the various elements of the present invention.

[0031] It should be understood that the terms "first," "second," "one," and "an" in the following description refer to "at least one" or "one or more" in embodiments. In particular, the term "one" may refer to "one" in one embodiment and to "more than one" in another embodiment. Therefore, the above terms should not be construed as limiting the actual number of elements of the present invention.

[0032] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0033] refer to Figure 1 、 Figure 2 and Figure 3 The present application discloses a portable display device 10, comprising a housing 100, a short-throw projector 200, a winding mechanism 300 and a screen 400. The housing 100 is used to provide rigid support for the entire device. The short-throw projector 200 is connected to the housing 100, and the projection ratio of the short-throw projector 200 is greater than 0.15 and less than 0.4. The winding mechanism 300 is connected to the housing 100, and the screen 400 is linked to the winding mechanism 300 to be driven to switch between an unfolded state and a retracted state. The short-throw projector 200 is used to project onto the unfolded screen 400. In some embodiments, a projector with a projection ratio less than 0.4 may also be generally referred to as an ultra-short-throw projector. Wherein, projection ratio = projection distance / screen width. The projection ratio of the short-throw projector 200 of the present application can be a value such as 0.15, 0.18, 0.2, 0.21, 0.25, 0.3, 0.35 or 0.32. Taking a throw ratio of 0.25 and a screen aspect ratio of 16:9 as an example, the required projection distance for a 100-inch screen is approximately 55 cm, which allows for a relatively compact device structure. The ultra-short-throw projector 200 is generally equipped with a laser light source, a display module, and optical components. The laser light source is used to provide illumination, and the display module and optical components can cooperate to form a complex projection light path, projecting the image onto a reflective surface such as a screen 400, thereby achieving a large-screen viewing or other projection display experience. There are a large number of public documents related to the ultra-short-throw projector 200, and this application will not elaborate on this.

[0034] refer to Figure 1 The housing 100 is approximately a hollow rectangular box, comprising a first end surface 101 and a second end surface 102 disposed opposite each other in the screen width direction, and a peripheral side surface 103 connected between the first and second end surfaces 101, 102. The light output area 201 of the short-throw projector 200 is exposed on the peripheral side surface 103, and the unfolded screen 400 is parallel to the screen width direction. Data interfaces, power interfaces, switch buttons, and the like can be provided on either the first or second end surface 101, 102. These structures can correspond to the circuit board 500 within the housing 100 to implement corresponding functions. Of course, data interfaces, power interfaces, switch buttons, and the like can also be provided on the peripheral side surface 103.

[0035] In some embodiments, the portable display device 10 may include a power supply battery disposed in the housing 100, such as a repeatedly chargeable and dischargeable lithium battery, and the power supply battery is used to power the short-throw projector 200, the winding mechanism 300, and other electronic components to enhance the usability of the portable display device 10. Moreover, with the advancement of battery technology, the energy density of batteries has been increasing, so a certain battery life can be achieved while reducing the size of the battery. Of course, in other embodiments, the portable device may not have a power supply battery and may be powered by an external power source such as AC power or a mobile power supply; or, in an environment where the vehicle can supply power, the portable display device 10 may be powered by the vehicle's power supply. Of course, in other embodiments, the housing 100 may be in other shapes such as a hollow triangular prism or other shapes.

[0036] Combined with Figure 2 For a rectangular housing 100, the peripheral side surface 103 may include a top surface 1031 and a bottom surface 1033 disposed opposite each other, as well as a first side surface 1035 and a second side surface 1037 connected between the top and bottom surfaces 1031 and 1033. The light exit area 201 is exposed to the top surface 1031, and the rolled-up screen 400 is closer to the second side surface 1037 than the first side surface 1035. The screen width corresponds to the length of the entire housing 100, the top and bottom surfaces 1031 and 1033 correspond to the height of the housing 100, and the first and second side surfaces 1035 and 1037 correspond to the width of the housing 100. In this embodiment of the present application, the height and width of the entire device can be relatively small. By ensuring that the length of the device meets the requirements of the unfolded size of the screen 400, a large-area projection display effect is achieved. While ensuring portability and a large projection area, the device's structural compactness is improved, the complexity of the winding mechanism 300 is reduced, and the operating reliability of the winding mechanism 300 is ensured.

[0037] refer to Figure 3The winding mechanism 300 may include a motor 310 connected to the housing 100, and a rotating drum 320 linked to the output end of the motor 310. The axis of the rotating drum 320 may extend along the width of the screen, with one end being sleeved on the output end of the motor 310 and the other end being rotatably connected to the housing 100. For example, in an embodiment of the present application, the motor 310 is fixedly connected to the housing 100 at the first end face 101. One end of the rotating drum 320 is rotatably connected to the output end of the motor 310 with its rotation axis parallel to the width of the screen, and the other end of the rotating drum 320 is rotatably connected to the housing 100 at the second end face 102. The motor 310 may be a stepper motor 310 to achieve relatively high control accuracy. The rolled-up screen 400 is wound around the drum 320. The free end of the screen 400 can be connected to the decorative part 600 and hidden in the shell 100. The decorative part 600 can also be regarded as a part of the screen 400. After the motor 310 is started, the drum 320 is driven to rotate, and the screen 400 is driven by the drum 320 to gradually unfold to the outside of the shell 100 until it switches to the unfolded state. The short-throw projector 200 then works and projects onto the unfolded screen 400.

[0038] Specifically, in some embodiments, the reeling mechanism 300 may include a support assembly 330 connected to the housing 100 and the screen 400. In the reeled state, the support assembly 330 is folded and retracted within the housing 100. In the extended state, the support assembly 330 is extended to the side of the screen 400 facing away from the short-throw projector 200. Exemplarily, the support assembly 330 includes two sets of link assemblies 331, each set of link assemblies 331 including a first link 3311 and a second link 3313. One end of the first link 3311 is rotatably connected to the housing 100, and the opposite end of the first link 3311 is rotatably connected to one end of the second link 3313. The opposite end of the second link 3313 is rotatably connected to the edge of the free end of the screen 400 via the decorative member 600. In the reeled state, the second link 3313 overlaps the first link 3311, and in the extended state, the two sets of link assemblies 331 are disposed opposite each other. The lengths of the first connecting rod 3311 and the second connecting rod 3313 can be comparable, and their sizes can be designed to be adaptable according to the unfolded height of the screen to ensure that when the screen 400 is in the rolled-up state, the second connecting rod 3313 is superimposed on the first connecting rod 3311, and the two groups of connecting rod assemblies 331 are arranged at intervals in the direction of the screen width, so as to avoid the two groups of connecting rod assemblies 331 overlapping each other in the rolled-up state and increasing the space required for the equipment in the height direction, and to prevent interference between the movements of the two groups of connecting rod assemblies 331 during the rolling or unfolding process.

[0039] In particular, refer to Figure 4In the embodiment of the present application, when the screen 400 is in the extended state, the first link 3311 and the second link 3313 of any set of link assemblies 331 are arranged at an angle, and the opening directions of the formed angle are arranged in opposite directions. For example, the opening direction of one set of link assemblies 331 is toward the first end surface 101, and the opening direction of the other set of link assemblies 331 is toward the second end surface 102. This structural arrangement, on the one hand, allows the first link 3311 and the second link 3313 of any set to occupy a certain dimension in the screen width direction, which can better support the entire screen 400, making the screen 400 relatively flat in the extended state and improving the projection display effect. On the other hand, the first link 3311 and the second link 3313 of any set tend to approach each other and overlap back into the housing 100 along the original extension trajectory. This ensures that the link assemblies 331 return smoothly when the screen 400 switches from the extended state to the retracted state. Furthermore, in some embodiments, the portable display device 10 may further include a stopper 700. When the screen 400 switches from the extended state to the retracted state, the stopper 700 may abut against the decorative member 600, serving as a trigger signal to stop the motor 310 and ensure the operational reliability of the retracting mechanism 300. The stopper 700 may be a travel switch or a pressure sensor, etc., and will not be described in detail herein.

[0040] exist Figure 2 、 Figure 3 In the illustrated embodiment, the portable display device 10 may further include two suspension members 800 connected to opposite ends of the housing 100 in a one-to-one correspondence. The suspension members 800 are used to suspend the entire device to an external support. For example, the suspension members 800 are equipped with assembly holes for suspending the entire device to a window or ceiling by bolts or the like. During the process of switching the screen 400 from the rolled-up state to the unfolded state, the screen 400 assists in pulling the connecting rod assembly 331 open under the action of gravity. Specifically, one suspension member 800 is connected to the housing 100 at the first end face 101, and the other suspension member 800 is connected to the housing 100 at the second end face 102. The entire portable display device 10 can be installed on a wall, window, ceiling, elevator or other location through the two suspension members 800, so that the screen 400 is unfolded downward relative to the housing 100 in the unfolded state. In this embodiment, when the curtain 400 switches from the retracted state to the unfolded state, the curtain 400 can pull the second connecting rod 3313 of the connecting rod assembly 331, and use gravity to assist the opening of the connecting rod assembly 331. There is no need to equip the connecting rod assembly 331 with a driving mechanism to realize the opening and retraction of the connecting rod assembly 331, thereby simplifying the structure of the retracting mechanism 300 and ensuring the working reliability of the retracting mechanism 300.

[0041] Of course, in other embodiments, the curtain 400 can be extended upward relative to the housing 100 in the extended state. For example, the linkage assembly 331 of the reeling mechanism 300 may include a primary linkage and a secondary linkage extending through the primary linkage. When the curtain 400 is in the reeled state, the secondary linkage retracts within the primary linkage and overlaps the housing 100. A primary actuator can be configured at the connection between the primary linkage and the housing 100 to rotate the primary linkage relative to the housing 100 toward the extended state, thereby initially extending the curtain 400. After the primary actuator rotates the primary linkage into position, a secondary actuator configured within the primary linkage can extend the secondary linkage beyond the primary linkage, further extending the curtain 400 to the extended state. The secondary actuator can be implemented in various ways, such as through a rack and pinion transmission or a pulley transmission. In this embodiment, the linkage assembly 331 used to support the upward extension of the curtain 400 can also have other structural forms, which will not be described in detail in this application.

[0042] In this embodiment where the screen 400 is extended upward relative to the housing 100, the suspension member 800 can be omitted. In indoor, outdoor, in-car and other environments, the user can use the portable display device 10 more conveniently to obtain a large-screen viewing or other projection display experience.

[0043] Continue to refer Figure 1 The top surface 1031 of the housing 100 is recessed to form a groove 100a. The groove 100a has an inclined wall 100b that is parallel to the width of the screen and forms an angle with the unfolded screen 400. The light exit area 201 is located on the inclined wall 100b. Figure 3 and Figure 5 The housing 100 may include a middle frame 110, a panel 120 covering the middle frame 110, and a light emitting member 130 assembled and fixed to the middle frame 110. The panel 120 has a top surface 1031 and may be made of glass, metal, or other materials to achieve a good decorative effect. The panel 120 is provided with a mounting groove 120a. The light emitting member 130 is embedded in the mounting groove 120a and has a groove 100a and an inclined wall 100b. The light emitting member 130 is embedded in the mounting groove 120a and has an inclined wall 100b. The inclined wall 100b has a light emitting area 201. This design can prevent the light outlet of the short-throw projector 200 from protruding too much from the top surface 1031, thereby reducing the overall appearance of the device. With this structural setting, the material of the light emitting element 130 and the material of the light emitting area 201 can be different from that of the panel 120. For example, the panel 120 uses a glass plate, the light emitting element 130 uses a plastic part, and the light emitting area 201 is configured with a sapphire sheet with high light transmittance and wear resistance, so that a better decorative effect can be obtained by using the panel 120, the light emitting element 130 can meet the requirements of convenient assembly, and the sapphire plate can be used to ensure the projection effect.

[0044] The middle frame 110 can be made of a relatively high-strength material, such as aluminum alloy, to provide good rigidity for the entire device. The winding mechanism 300, short-throw projector 200, suspension member 800, and other components can be assembled and restrained on the middle frame 110, ensuring the reliability of these components' restraints and providing good protection for the internal components, preventing the device from being easily deformed by impact. The middle frame 110 can have a first end surface 101, a second end surface 102, a bottom surface 1033, and a first side surface 1035 and a second side surface 1037. The surface of the middle frame 110 can also be covered with a decorative panel to structure these surfaces.

[0045] Further, combined Figure 3 and Figure 6 The portable display device 10 may include a heat sink 910 and a speaker 920 spaced apart along the width of the screen. The short-throw projector 200 is disposed between the heat sink 910 and the speaker 920. First air holes 100c are respectively provided on the top surface 1031, the bottom surface 1033, and the first side surface 1035 at positions corresponding to the heat sink 910. Second air holes 100d are respectively provided on the top surface 1031 and the first side surface 1035 at positions corresponding to the speaker 920. The heat sink 910 may include two or more fans, which, in combination with alloy fins, guide convection of air inside the housing 100 and air outside the housing 100 through the first air holes 100c to dissipate heat for the short-throw projector 200 and prevent it from being damaged by excessive temperature rise. The speaker 920 can output sound through the second air holes 100d, thereby enhancing the viewing or other projection display experience of the portable display device 10.

[0046] The above portable display device 10 includes a housing 100, a short-throw projector 200, a reeling mechanism 300, and a screen 400. The short-throw projector 200 is connected to the housing 100, and the projection ratio of the short-throw projector 200 is greater than 0.15 and less than 0.4. The reeling mechanism 300 is connected to the housing 100. The screen 400 is linked to the reeling mechanism 300 to be driven to switch between an extended state and a reeled state. The short-throw projector 200 is used to project onto the extended screen 400. The portable display device 10 of the present application integrates the ultra-short-throw projector and the screen 400 into a whole, and the screen 400 is linked to the reeling mechanism 300 to be driven to switch between an extended state and a reeled state. When the screen 400 is in the reeled state, the appearance of the entire device can be relatively simple, making it convenient to carry and transport. Users can project images onto the unfolded screen 400 using the short-throw projector 200 without configuring a separate mounting bracket for the screen 400. Combined with the short-throw projector 200's design of a throw ratio greater than 0.15 and less than 0.4, the distance between the short-throw projector 200 and the screen 400 can be set to a smaller size to reduce the overall device size, improving the device's portability while enabling large-scale images to be projected onto the unfolded screen 400. Furthermore, the portable display device 10 of the present application avoids the hassles of installing the screen 400 or selecting a projection wall, and even eliminates the need for mounting a bracket for the screen 400 in outdoor environments. It can be flexibly used in various environments, including indoors, outdoors, and in vehicles, improving ease of use and user experience.

[0047] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A portable display device, characterized in that: include: case; a short-throw projector connected to the housing, wherein the projection ratio of the short-throw projector is greater than 0.15 and less than 0.4; a winding mechanism connected to the housing; as well as The screen is linked with the reeling mechanism to be driven to switch between an extended state and a reeled state, and the short-throw projector is used for projecting onto the screen in the extended state.

2. The portable display device according to claim 1, wherein: The shell includes a first end face and a second end face arranged opposite to each other in the screen width direction, and a peripheral side face connected between the first end face and the second end face. The light output area of ​​the short-focus projector is exposed to the peripheral side face, and the screen in the unfolded state is parallel to the screen width direction.

3. The portable display device according to claim 2, wherein: The peripheral side surface includes a top surface and a bottom surface that are relatively arranged, and a first side surface and a second side surface connected between the top surface and the bottom surface. The light exit area is exposed to the top surface, and the curtain in the rolled state is closer to the second side surface than to the first side surface.

4. The portable display device according to claim 3, wherein: The top surface is concave to form a groove, and the groove has an inclined wall parallel to the width direction of the curtain and arranged at an angle to the curtain in the unfolded state, and the light exit area is located on the inclined wall.

5. The portable display device according to claim 4, wherein: The shell includes a middle frame, a panel covering the middle frame, and a light emitting component assembled and fixed to the middle frame. The panel has the top surface and is provided with a mounting groove. The light emitting component is embedded in the mounting groove and has the groove and the inclined wall.

6. The portable display device according to claim 3, wherein: The portable display device includes a radiator and a speaker arranged at intervals along the width of the screen, the short-throw projector is arranged between the radiator and the speaker, the top surface, the bottom surface and the first side surface corresponding to the position of the radiator are respectively provided with first air holes, and the top surface and the first side surface corresponding to the position of the speaker are respectively provided with second air holes.

7. The portable display device according to any one of claims 1 to 6, characterized in that: The winding mechanism includes a motor connected to the housing and a rotating drum linked to the output end of the motor. The motor is used to drive the curtain to switch between the unfolded state and the wound state through the rotating drum, and the curtain in the wound state is wound around the rotating drum.

8. The portable display device according to claim 7, wherein: The winding mechanism includes a support assembly connected to the shell and the screen. In the wound state, the support assembly is folded and retracted into the shell. In the unfolded state, the support assembly is opened on the side of the screen away from the short-throw projector.

9. The portable display device according to claim 8, wherein: The support assembly includes two groups of connecting rod assemblies, each group of the connecting rod assemblies includes a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected to the shell, the other end of the first connecting rod is rotatably connected to one end of the second connecting rod, and the other end of the second connecting rod is rotatably connected to the edge of the curtain; in the retracted state, the second connecting rod is stacked on the first connecting rod, and in the unfolded state, the two groups of the connecting rod assemblies are arranged opposite to each other.

10. The portable display device according to claim 9, wherein: The portable display device includes two suspension members connected to opposite ends of the shell in a one-to-one correspondence, and the suspension members are used to be suspended to an external support; when the screen switches from a rolled-up state to an unfolded state, the screen assists in pulling the connecting rod assembly to open under the action of gravity.

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