Laser projection device

Abstract

The application discloses a laser projection device, comprising a receiving part, an optical engine and a projection screen, the projection screen comprising a curling mechanism, a lifting mechanism and a curtain. The receiving part has a first accommodating part and a second accommodating part, the optical engine is arranged in the inner cavity of the first accommodating part, the curling mechanism is arranged in the inner cavity of the second accommodating part, and the curling mechanism comprises a winding drum for connecting with the curtain and a curling motor; the lifting mechanism comprises a supporting frame and a lifting motor, the two ends of the supporting frame are fixedly connected with the inner cavity of the second accommodating part and the curtain respectively, and the lifting motor adjusts the distance between the supporting frame and the second accommodating part. The second accommodating part has an opening, when the laser projection device is started or turned off, the curling motor and the lifting motor can be started at the same time, thereby driving the winding drum to rotate, the supporting frame to ascend or descend, and the second end of the curtain to pass through the opening to be unfolded or curled. The application realizes the integrated arrangement of the optical engine and the curtain, and improves the intelligence of the device.

Description

[0001] This application is a divisional application based on a domestic application, parent application number: 201911235893.7, application date: 2019-12-05, invention title: laser projection device. Technical Field

[0002] This application relates to the field of projection technology, and in particular to a laser projection device. Background Technology

[0003] With the continuous development of technology, laser projection equipment is increasingly being used in people's work and daily lives. A laser projection device mainly consists of an optical engine and a projection screen. The optical engine emits a light beam to the projection screen, while the projection screen reflects the beam emitted by the optical engine to display the image on the projection screen's display area. The display area on the projection screen refers to the area where the optical film is located.

[0004] In related technologies, when using a laser projection device for projection, the projection screen can be fixed on the support first, and then the optical engine can be placed directly in front of the projection screen to ensure that the beam emitted by the optical engine can form a display image in the display area of ​​the projection screen.

[0005] However, fixing the projection screen to the support requires drilling holes in the support, and the screen continues to occupy space after it is fixed. Furthermore, because the optical engine is independently fixed, it is easily affected by external factors, causing the emitted beam to deviate from the display area on the projection screen. Summary of the Invention

[0006] This application provides a laser projection device that solves the problems of space occupation and easy deviation of the emitted beam from the optical engine. The technical solution is as follows:

[0007] A laser projection device, the laser projection device comprising:

[0008] The storage section has a first receiving section and a second receiving section;

[0009] An optical engine is disposed within the inner cavity of the first accommodating portion, the first accommodating portion having a light-transmitting area, and the light beam emitted by the optical engine can pass through the light-transmitting area.

[0010] A projection screen, the projection screen including a roll-up mechanism and a screen;

[0011] The curling mechanism is disposed in the inner cavity of the second accommodating part, and the first end of the curtain is connected to the curling mechanism. The curling mechanism can control the curtain to be rolled up to the second accommodating part.

[0012] The second receiving portion is provided with an opening, through which the second end of the curtain can be opened and the curtain can receive light beams passing through the light-transmitting area after it is opened.

[0013] In one possible implementation, the vertical distance between the center point of the light-transmitting area and the plane in which the screen is unfolded is equal to the ratio between the projection ratio of the optical engine and the width of the display area on the screen, wherein the width of the display area refers to the dimension of the display area along the length of the opening.

[0014] Optionally, the distance from the center point of the light-transmitting area to both ends of the opening is equal.

[0015] Optionally, the storage portion has a T-shaped structure, and the volume of the first accommodating portion is smaller than the volume of the second accommodating portion.

[0016] Optionally, the winding mechanism includes: a winding controller, a winding motor, and a winding drum;

[0017] The curling controller is electrically connected to the curling motor, the curling motor is fixedly connected to the end of the roller, and the first end of the curtain is fixedly connected to the roller.

[0018] The winding controller can control the start and stop of the winding motor, and the winding motor can drive the drum to rotate.

[0019] Optionally, the coiling motor includes a motor body and rollers;

[0020] The motor body is electrically connected to the winding controller, and the motor shaft of the motor body is fixedly connected to the roller;

[0021] The roller has a boss along the axial direction on its circumferential surface, and the inner wall of the drum has a groove that matches the boss, and the boss can be confined within the groove.

[0022] Optionally, the inner wall of the drum is provided with a wedge groove along the axial direction, and a wedge block is provided on the motor shaft of the winding motor. The wedge block can be limited to the wedge groove along the circumferential direction of the drum.

[0023] Optionally, the outer wall of the roll is provided with a slot along the axial direction, and the first end of the curtain is provided with a strip that matches the slot, the strip being able to be radially limited within the slot along the roll.

[0024] Optionally, the cross-section of the card slot and the cross-section of the card strip are both inverted T-shaped.

[0025] Optionally, the optical engine is an ultra-short focal length optical engine.

[0026] The beneficial effects of the technical solution provided in this application include at least the following:

[0027] The optical engine is housed within the first receiving cavity, and the curling mechanism is housed within the second receiving cavity. The first end of the screen is fixedly connected to the curling mechanism, achieving an integrated design of the optical engine and screen, thus avoiding changes in their relative positions. Because the curling mechanism can control the screen to retract into the second receiving cavity, and the second end of the screen can pass through the opening and unfold, the screen can be retracted or unfolded, avoiding the problem of large space occupation by laser projection devices when not in use. After the screen is unfolded, the beam emitted by the optical engine can pass through the light-transmitting area of ​​the first receiving cavity and be projected onto the screen, thereby displaying the image. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a laser projection device provided in an embodiment of this application;

[0030] Figure 2 This is an exploded structural diagram of a laser projection device provided in an embodiment of this application;

[0031] Figure 3 This is a cross-sectional structural schematic diagram of a curling mechanism provided in an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the structure of a reel provided in an embodiment of this application;

[0033] Figure 5 This is a schematic diagram of the structure of a roller provided in an embodiment of this application.

[0034] Figure label:

[0035] 1: Storage unit; 2: Optical engine; 3: Projection screen;

[0036] 11: First receiving section; 12: Second receiving section; 31: Curtain mechanism; 32: Curtain;

[0037] 111: Light-transmitting area; 121: Opening; 311: Winding controller; 312: Winding motor; 313: Roller;

[0038] 3121: Motor body; 3122: Roller; 3131: Boss; 3132: Slot; 31221: Groove. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0040] Figure 1 A schematic diagram illustrating the structure of a laser projection device according to an embodiment of this application is provided. Figure 2 An exploded structural diagram of a laser projection device according to an embodiment of this application is provided. Figure 1 and Figure 2 As shown, the laser projection device includes: a storage unit 1, an optical engine 2, and a projection screen 3. The projection screen 3 includes a roll-up mechanism 31 and a screen 32. The storage unit 1 has a first receiving portion 11 and a second receiving portion 12. The optical engine 2 is disposed within the cavity of the first receiving portion 11, which has a light-transmitting area 111 through which the light beam emitted by the optical engine 2 can pass. The roll-up mechanism 31 is disposed within the cavity of the second receiving portion 12. The first end of the screen 32 is connected to the roll-up mechanism 31, which controls the screen 32 to roll up to the second receiving portion 12. The second receiving portion 12 has an opening 121 through which the second end of the screen 32 can pass and unfold. When unfolded, the screen 32 can receive the light beam passing through the light-transmitting area 111.

[0041] In this embodiment, the optical engine 2 is disposed within the inner cavity of the first accommodating portion 11, and the curling mechanism 31 is disposed within the inner cavity of the second accommodating portion 12. The first end of the screen 32 is fixedly connected to the curling mechanism 31, achieving an integrated design of the optical engine 2 and the screen 32, thus avoiding changes in the relative positions between the optical engine 2 and the screen 32. Since the curling mechanism 31 can control the screen 32 to retract into the second accommodating portion 12, and the second end of the screen 32 can pass through the opening 121 and unfold, the screen 32 can be retracted or unfolded, avoiding the problem of the laser projection device occupying a large space when not in use. After the screen 32 is unfolded, the light beam emitted by the optical engine 2 can pass through the light-transmitting area 111 provided in the first accommodating portion 11 and be projected onto the screen 32, thereby achieving image display.

[0042] In actual implementation, the curling mechanism 31 drives the first end of the curtain 32 to rotate forward along the circumference of the curling mechanism 31, thereby curling the curtain 32 onto the curling mechanism 31 along the first end to achieve the retraction of the curtain 32. The curling mechanism 31 then drives the first end of the curtain 32 to rotate in the opposite direction along the circumference of the curling mechanism 31, at which point the second end of the curtain 32 can pass through the opening 121 and unfold. The clockwise direction can be defined as the forward direction, and the counterclockwise direction as the reverse direction.

[0043] Among them, optical engine 2 can be an ultra-short focal length optical engine 2, or of course, optical engine 2 can be a short focal length optical engine 2 or a long focal length optical engine 2.

[0044] In some embodiments, the optical engine 2 may include a light source, an optomechanical system, a lens, a DMD (Digital Micromirror Device) chip, a control circuit board, an audio processing system, a speaker, a heat dissipation system, and a heat sink. The light source and the lens are fixedly connected to the optomechanical system. The DMD chip is disposed within the optomechanical system. The DMD chip, the audio processing system, and the heat dissipation system are electrically connected to the control circuit board. The audio processing system is also electrically connected to the speaker, and the heat dissipation system is also electrically connected to the heat sink.

[0045] In this way, the light beam emitted from the light source hits the DMD chip within the optomechanical system. The control circuit board modulates the light beam emitted from the DMD chip, and the modulated beam, carrying the image information output by the control circuit board, is emitted through the lens, and then emitted through the lens to the projection screen 3, including the screen 32, for display. Additionally, the control circuit board controls the audio processing system to process the audio information output by the control circuit board and amplifies the processed audio information through speakers. During image display and audio amplification, the control circuit board can control the cooling system to drive the heat sink for heat dissipation, preventing high temperatures from affecting the functionality of the components.

[0046] In some embodiments, the vertical distance between the center point of the light-transmitting area 111 and the plane on which the screen 32 is located when it is unfolded is equal to the ratio between the projection ratio of the optical engine 2 and the width of the display area on the screen 32, where the width of the display area refers to the dimension of the display area along the length of the opening 121.

[0047] The length of the display area on the screen 32 along the length direction of the opening 121 can be less than or equal to the width of the screen 32. The center point of the light-transmitting area 111 can refer to the center point of the light beam emitted by the optical engine 2, that is, the light outlet of the optical engine 2 is located in the central region of the light-transmitting area 111. The width of the screen 32 refers to the length of the side of the screen 32 that is in the same direction as the length direction of the opening 121.

[0048] Since the projection ratio is a performance parameter of the optical engine 2 itself, the projection ratio of the optical engine 2 is related to the selected optical engine 2. That is, different optical engines 2 will result in different projection ratios, and consequently, the vertical distance between the center point of the light-transmitting area 111 and the plane where the screen 32 is unfolded will also be different.

[0049] In this way, during the actual setup process, the vertical distance between the center point of the light-transmitting area 111 and the plane where the screen 32 is unfolded can be calculated by the projection ratio of the optical engine 2 and the width of the display area. Then, this vertical distance is determined as the vertical distance between the center point of the light-transmitting area 111 and the center line of the opening 121 along the length direction, so as to ensure that the light beam emitted by the optical engine 2 can be completely projected onto the display area of ​​the screen 32.

[0050] Furthermore, the distances from the center point of the light-transmitting area 111 to both ends of the opening 121 can be equal. This allows the projection formed by the light beam emitted from the optical engine 2 to be located in the center area of ​​the display area on the screen 32.

[0051] It should be noted that when setting up the screen 32, in order to make the resulting projection coincide with the display area and improve the display effect, the midpoint of one side of the screen 32 along the width direction of the display area coincides with the midpoint of the opening 121 along the length direction, and the display area is located in the center area of ​​the screen 32.

[0052] In some embodiments, such as Figure 2 As shown, the storage part 1 can be T-shaped, and the volume of the first accommodating part 11 is smaller than the volume of the second accommodating part 12.

[0053] The first accommodating part 11 and the second accommodating part 12 can be detachably connected, or they can be non-detachably connected, meaning that the first accommodating part 11 and the second accommodating part 12 can be integrally connected.

[0054] It should be noted that when the first receiving part 11 and the second receiving part 12 are detachably connected, if the optical engine 2 malfunctions, the first receiving part 11 can be disassembled, and the first receiving part 11 with the optical engine 2 can be sent for repair as a whole. If the rolling mechanism 31 included in the projection screen 3 malfunctions, the second receiving part 12 can be disassembled, and the second receiving part 12 with the rolling mechanism 31 can be sent for repair as a whole, thereby avoiding the need to send the entire laser projection device for repair.

[0055] In some embodiments, the first accommodating portion 11 and the second accommodating portion 12 can be connected by a telescopic rod, which can extend and retract along its own axis. That is, as the telescopic rod extends and retracts, the vertical distance between the center point of the light-transmitting area 111 on the first accommodating portion 11 and the opening 121 on the second accommodating portion 12 can be adjusted, thereby adjusting the projection distance between the center point of the beam emitted by the optical engine 2 and the plane where the screen 32 is unfolded, so as to adjust the size of the display image on the display area of ​​the beam emitted by the optical engine 2. In addition, since the vertical distance between the center point of the light-transmitting area 111 on the first accommodating portion 11 and the opening 121 on the second accommodating portion 12 is adjustable, the laser projection device can adapt to optical engines 2 with different projection ratios while ensuring the size of the display image.

[0056] In some embodiments, the screen 32 may include a fabric body and an optical film. The first end of the fabric body is fixedly connected to the rolling mechanism 31, and the second end of the fabric body can extend out of the second receiving portion 12 through the opening 121 and unfold. The optical film is fixed on the fabric body to form a display area on the fabric body, that is, the optical film on the fabric body is the display area.

[0057] In this way, by connecting the fabric body with the curling mechanism 31, the fabric body can be rolled up. Furthermore, since the second end of the fabric body can extend out of the opening 121 and unfold, the optical film can be rolled up or unfolded synchronously.

[0058] The length or width of the optical film can be smaller than the length or width of the fabric, so that the fabric can support the entire area of ​​the optical film. In addition, when the length of the optical film is smaller than the length of the fabric, the optical film can be fixed to the side of the screen 32 near the second end, so that when the screen 32 is unfolded, the optical film is completely exposed outside the second receiving part 12.

[0059] In other embodiments, the screen 32 may include a rollable substrate and a sub-screen. The first end of the rollable substrate is fixedly connected to the rolling mechanism 31, and the second end of the rollable substrate can extend out of the second receiving portion 12 through the opening 121 and unfold. The sub-screen is laminated and bonded to the first side of the rollable substrate. In this way, the rollable substrate can be rolled up by connecting it to the rolling mechanism 31. Since the second end of the rollable substrate can pass through the opening 121 and unfold, the rollable substrate can be unfolded, and the sub-screen can be laminated and bonded to the rollable substrate, thereby driving the sub-screen to roll up or unfold synchronously.

[0060] The sub-screen may include a soft cloth and an optical film. The first side of the soft cloth can be laminated and bonded to the back of the optical film, and the second side of the soft cloth can be laminated and bonded to the first side of the rollable substrate. This protects the optical film from damage by the rollable substrate. Alternatively, the sub-screen may consist only of the optical film, which may be directly laminated and bonded to the rollable substrate, as long as the sub-screen enables image display. This application does not limit this specific implementation.

[0061] The rollable substrate can be in the form of a roller shutter structure to facilitate its rolling. At the same time, when the rollable substrate is unfolded, the flatness of the sub-screen can be ensured by the support of the rollable substrate.

[0062] In some embodiments, there may be two rollable substrates in the shape of a roller shutter, and the length of each rollable substrate may be greater than or equal to the length of the sub-screen, while the sum of the widths of the two rollable substrates may be less than the width of the sub-screen. Thus, the two rollable substrates in the roller shutter structure can be fixed along the length of the sub-screen on both sides to support the sides of the sub-screen, thereby preventing the sides of the sub-screen from curling and wrinkling under the tension of the rolling mechanism 31 and the support mechanism, thus improving the display effect of the sub-screen.

[0063] The length of the sub-screen refers to the length of the side of the sub-screen that is in the same direction of unfolding as the second end of the sub-screen, and the width of the sub-screen refers to the length of the side of the sub-screen that is perpendicular to the unfolding direction of the second end of the sub-screen.

[0064] Both rollable substrates, which have a roller shutter structure, can be fixed to the front of the sub-screen. Of course, both rollable substrates can also be fixed to the back of the sub-screen; this embodiment does not limit this. When the two rollable substrates are fixed to the front of the sub-screen, there is no overlap between the display area on the sub-screen and the fixed areas of the two rollable substrates.

[0065] In other embodiments, the number of rollable substrates in the shape of a roller shutter can also be one, and the length of the rollable substrate can be greater than the length of the sub-screen, and the width of the rollable substrate can be greater than or equal to the width of the sub-screen. In this way, the back side of the sub-screen can be laminated and bonded to the first side of the rollable substrate, so that the rollable substrate can support the entire area of ​​the sub-screen, thereby preventing the middle part of the sub-screen from curling and wrinkling under the tension of the first and second ends of the sub-screen, which would reduce the display effect of the sub-screen. Here, the back side of the sub-screen refers to the side of the sub-screen that is away from the optical engine 2 when the sub-screen is unfolded.

[0066] Of course, in addition to having a roll-up structure, the rollable substrate can also have a smooth planar structure when unfolded. The dimensions of the rollable substrate with a smooth planar shape when unfolded can be the same as or similar to the dimensions of the rollable substrate with a roll-up door shape described above; this application does not limit this aspect.

[0067] The rollable substrate, which unfolds into a smooth, flat shape, can be made of synthetic fabric, which can be directly laminated and bonded to the optical film. Of course, the rollable substrate, which unfolds into a smooth, flat shape, can also be made of other materials, such as steel sheets, etc., and this application does not limit this.

[0068] The hardness of the rollable substrate, which is smooth and planar when unfolded, can be between 60 and 70 Rockwell hardness. This allows the rollable substrate to pass through the opening 121 and unfold under its own tension when the rolling mechanism 31 is not rolling it, thereby enabling the unfolding of the sub-screen; it also facilitates rolling along the circumferential direction of the rolling mechanism 31, so as to drive the sub-screen fixed on the rollable substrate to roll synchronously, thereby enabling the retraction of the sub-screen.

[0069] The flatness of the rollable substrate, which is smooth and planar when unfolded, can be determined artificially based on the projection ratio of the optical engine 2. For example, when the projection ratio of the optical engine 2 is 0.25, the flatness of the rollable substrate can be 0.5 / 10000.

[0070] In some embodiments, a protective coating may be provided on the second side of the rollable substrate. In this way, when the rollable substrate is rolled up by the roll-up mechanism 31, the protective coating can prevent the light-receiving surface of the sub-screen from directly contacting the rollable substrate, thereby preventing the rollable substrate from scratching the light-receiving surface of the sub-screen and thus improving the service life of the sub-screen.

[0071] The protective coating can be a Teflon coating or a coating of a soft material such as foam, as long as it can isolate and protect the sub-screen. This application does not limit this.

[0072] In the embodiments of this application, such as Figure 3 As shown, the winding mechanism 31 may include: a winding controller 311, a winding motor 312, and a roller 313. The winding controller 311 is electrically connected to the winding motor 312, and the winding motor 312 is fixedly connected to the end of the roller 313. The first end of the curtain 32 is fixedly connected to the roller 313. The winding controller 311 can control the start and stop of the winding motor 312, and the winding motor 312 can drive the roller 313 to rotate.

[0073] The winding controller 311 can control the winding motor 312 to rotate forward or backward when it receives a control signal from a remote control that is connected to it. Alternatively, the winding controller 311 can be electrically connected to control buttons, in which case control signals can be sent to the winding controller 311 via the control buttons to control the winding motor 312 to rotate forward or backward.

[0074] The winding controller 311 may include a microcontroller and a signal receiver. The microcontroller is electrically connected to the signal receiver and the winding motor 312 respectively. In this way, after the signal receiver receives the control signal, the signal receiver sends the control signal to the microcontroller, and the microcontroller controls the winding motor 312 to rotate forward or backward based on the control signal.

[0075] The ends of the winding motor 312 and the drum 313 can be limited in the circumferential direction, and the winding motor 312 and the drum 313 can move in the axial direction, so that the drum 313 can rotate synchronously with the winding motor 312, and the winding motor 312 and the drum 313 can be detached.

[0076] In some embodiments, continue as follows Figure 3 As shown, there can be one winding motor 312, so that the motor shaft of the winding motor 312 can be connected to one end of the winding drum 313, and the end of the winding drum 313 away from the winding motor 312 is connected to the inner wall of the second accommodating part 12.

[0077] In this way, when the winding motor 312 drives the drum 313 to rotate synchronously, the end of the drum 313 that is connected to the inner wall shaft of the second accommodating part 12 can provide support for the end of the drum 313 that is away from the winding motor 312 through the shaft, so as to avoid the end of the drum 313 that is connected to the inner wall shaft of the second accommodating part 12 from shaking, and also to prevent the end of the drum 313 that is connected to the inner wall shaft of the second accommodating part 12 from bending due to gravity.

[0078] In some other embodiments, there may be two winding motors 312, which are located on both sides of the drum 313 and are fixedly connected to both ends of the drum 313 along the circumferential direction of the drum 313.

[0079] This allows the two winding motors 312 to simultaneously drive the roller 313 to rotate, providing the same torque to both ends of the roller 313. This avoids different speeds at both ends of the roller 313 due to different torques, and allows the screen 32 to be rolled up at a uniform speed, thereby improving the stability of the projection screen 3.

[0080] In some embodiments, the inner wall of the drum 313 may be provided with a wedge groove (not shown in the figure) along the axial direction, and a wedge block (not shown in the figure) may be provided on the motor shaft of the winding motor 312. The wedge block can be clamped in the wedge groove along the circumferential direction of the drum 313, thereby fixing the motor shaft of the winding motor 312 and the drum 313 along the circumferential direction, and thus enabling the drum 313 and the motor shaft of the winding motor 312 to rotate synchronously.

[0081] The cross-section of the wedge groove provided on the inner wall of the drum 313 can be rectangular or trapezoidal, or other shapes, as long as it can transmit the torque of the winding motor 312. This application embodiment does not limit this.

[0082] The inner wall of the drum 313 can have one or more wedge grooves. When there are multiple wedge grooves, they can be arranged along the circumference of the drum 313. The specific number of wedge grooves depends on the torque transmitted by the winding motor 312. As long as the torque of the winding motor 312 can be transmitted to the drum 313 and the drum 313 has a certain service life, this embodiment does not limit this.

[0083] It should be noted that the winding motor 312 can be a stepper motor, which facilitates the control of the winding controller 311 over the winding motor 312. For example, the winding controller 311 can send control signals to the stepper motor to control its forward and reverse rotation, thereby driving the drum 313 to rotate forward and reverse.

[0084] Of course, the winding motor 312 can also be other motors, such as a DC geared motor, as long as it can be easily controlled by the winding controller 311. This application embodiment does not limit this.

[0085] In other embodiments, combined with, for example Figure 3 , Figure 4 and Figure 5 As shown, the winding motor 312 includes a motor body 3121 and a roller 3122. The motor body 3121 is electrically connected to the winding controller 311. The motor shaft of the motor body 3121 is fixedly connected to the roller 3122. A groove 31221 is provided axially on the circumferential surface of the roller 3122. A boss 3131 matching the groove 31221 is provided on the inner wall of the winding drum 313. The boss 3131 can be limited within the groove 31221.

[0086] In this way, the roller 3122 fixed on the motor shaft of the motor body 3121 is inserted into the inner cavity of the drum 313 so that the groove 31221 on the roller 3122 cooperates with the boss 3131 in the inner cavity of the drum 313. The torque on the motor shaft of the motor body 3121 is transmitted to the drum 313 through the roller 3122, thereby realizing the synchronous rotation of the drum 313 and the motor shaft of the motor body 3121, and thus realizing the synchronous rotation of the drum 313 and the winding motor 312.

[0087] The cross-section of the protrusion 3131 provided on the inner wall of the drum 313 can be rectangular or trapezoidal, or of course other shapes, as long as it can transmit the torque of the winding motor 312. This application embodiment does not limit this.

[0088] The inner wall of the drum 313 may have one or more protrusions 3131. When there are multiple protrusions 3131, they may be arranged along the circumference of the drum 313. The specific number of protrusions 3131 is determined according to the torque transmitted by the motor body. As long as the torque of the motor body can be transmitted to the drum 313 and the drum 313 has a certain service life, this embodiment does not limit this.

[0089] It should be noted that the motor body can be a stepper motor, which facilitates the control of the winding controller 311 over the winding motor 312. Of course, the motor body can also be other types of motors, as long as they can be easily controlled by the winding controller 311. This application embodiment does not limit this.

[0090] It should also be noted that, in addition to the two embodiments described above that enable the synchronous rotation of the motor shaft of the winding motor 312 and the drum 313, other structures can also be used to achieve the synchronous rotation of the motor shaft of the winding motor 312 and the drum 313. This application does not limit this aspect.

[0091] In some embodiments, such as Figure 4 As shown, the outer wall of the roller 313 can be provided with a slot 3132 along the axial direction, and the first end of the curtain 32 can be provided with a clip (not shown in the figure) that matches the slot 3132. The clip can be limited in the slot 3132 along the radial direction of the roller 313, thereby realizing the limitation of the first end of the curtain 32 along the circumferential direction of the roller 313.

[0092] In this way, when the roller 313 rotates, the limiting action of the retaining strip allows the first end of the screen 32 to be rolled synchronously with the roller 313, thus allowing the screen 32 to be rolled onto the roller 313. Furthermore, due to the limiting action of the retaining strip 321, the roller 313 can provide a certain pulling force to the first end of the screen 32. This pulling force can cooperate with the action of the second end of the screen 32 unfolding, making the screen 32 flatter and thus improving the display effect of the screen 32.

[0093] The cross-section of the card slot 3132 and the cross-section of the card strip can both be inverted T-shaped. In this way, when the card slot 3132 and the card strip are fixedly connected, the card strip can be directly inserted into the card slot 3132 along the length direction of the card slot 3132. The card strip is limited by the card slot 3132, and the card strip is fixedly connected to the card slot 3132. This allows the first end of the curtain 32 to be fixed to the roller 313 conveniently and quickly.

[0094] It should be noted that the cross-section of the card slot 3132 and the cross-section of the card strip can be either inverted T-shaped or square, or of course, other shapes, as long as the card slot 3132 can limit the card strip along the circumferential direction of the roll 313. This application embodiment does not limit this.

[0095] The depth of the slot 3132 can be equal to the height of the strip. In this way, when the roller 313 rotates and causes the curtain 32 to roll up, the curtain 32 can be tightly attached to the roller 313, thereby avoiding the phenomenon that the curtain 32 is subjected to shearing force from the edge of the strip or the slot 3132 when the height of the strip is greater than or less than the depth of the slot 3132.

[0096] It should be noted that, in addition to limiting the first end of the screen 32 along the circumferential direction of the roller 313 through the cooperation of the slot 3132 and the strip, the first end of the screen 32 can also be limited along the circumferential direction of the roller 313 by bonding the outer wall of the roller 313 to the first end of the screen 32. Of course, the second end of the screen 32 can also be limited along the circumferential direction of the roller 313 through other means, which will not be elaborated in this embodiment.

[0097] In this embodiment, in addition to the screen 32 being able to pass through the opening 121 and unfold under its own tension, the projection screen 3 may also include a lifting mechanism, so that the screen 32 can pass through the opening 121 and unfold under the support of the lifting mechanism.

[0098] In some embodiments, the lifting mechanism may include a lifting controller, a lifting motor, and a support frame. The lifting controller is electrically connected to the lifting motor. A first end of the support frame is fixedly connected to the second receiving portion 12, and a second end of the support frame is fixedly connected to the second end of the curtain 32. The lifting controller can control the start and stop of the lifting motor, and the lifting motor can adjust the distance between the second end of the support frame and the second receiving portion 12.

[0099] Thus, after the lifting controller starts the lifting motor, the lifting motor can drive the second end of the support frame to rise, which in turn drives the second end of the curtain 32 to rise. At this time, the curtain 32 can be unfolded while the rolling mechanism 31 controls the curtain 32 to rotate in the reverse direction. In addition, when the lifting motor drives the second end of the support frame to descend, it can drive the second end of the curtain 32 to descend. At this time, the curtain 32 can be retracted while the rolling mechanism 31 controls the curtain 32 to rotate in the forward direction.

[0100] The first end of the support frame can be fixed to the outer wall of the second receiving portion 12. Alternatively, the first end of the support frame can pass through the opening 121 and be fixed to the inner cavity of the second receiving portion 12. When the first end of the support frame is fixed to the inner cavity of the second receiving portion 12, the second end of the support frame can be locked at the opening 121 when the curtain 32 is rolled up, ensuring that the curtain 32 can be completely retracted into the second receiving portion 12, thereby protecting the curtain 32.

[0101] The lifting controller can control the lifting motor to rotate forward or backward when it receives a control signal from the remote control it communicates with, thereby controlling the rise or fall of the support frame. Alternatively, the lifting controller can be electrically connected to control buttons, in which case control signals can be sent to the lifting controller via the control buttons to control the rise or fall of the support frame through the forward or reverse rotation of the lifting motor.

[0102] The lifting controller may include a microcontroller and a signal receiver. The microcontroller is electrically connected to both the signal receiver and the lifting motor. After the signal receiver receives the control signal, it sends the control signal to the microcontroller, which then controls the lifting motor to rotate forward or backward based on the control signal.

[0103] It should be noted that when the structure of the roll-up mechanism 31 is as described above, the lifting controller and the roll-up controller 311 can be the same controller. Thus, when the laser projection equipment is started, after receiving a start signal from the remote control with which it is connected, this same controller can control the roll-up motor 312 and the lifting motor to start simultaneously based on the start signal. At this time, the roll-up motor 312 drives the roll drum 313 to rotate synchronously in reverse, and the lifting motor drives the second end of the support frame to rise, thereby unfolding the screen 32. When the laser projection equipment is turned off, after receiving a turn-off signal from the remote control with which it is connected, this same controller can control the roll-up motor 312 and the lifting motor to start simultaneously based on the turn-off signal. At this time, the roll-up motor 312 drives the roll drum 313 to rotate synchronously in forward, and the lifting motor drives the second end of the support frame to descend, thereby rolling up the screen 32.

[0104] It should also be noted that when the screen is unfolded, the required height of the second end of the screen 32 can be pre-designed. Based on this height, the operating time of the roll-up motor 312 and the lifting motor can be pre-controlled. That is, when the same controller receives a start signal, it can automatically control the second end of the screen 32 to rise to the required height within this operating time to achieve full unfolding of the screen 32; or when it receives a close signal, it can automatically control the screen 32 to roll up onto the roller 313 within this operating time to achieve full retraction of the screen 32. Of course, the same controller can also be manually controlled to achieve full unfolding or retraction of the screen 32.

[0105] In some embodiments, the support frame may include a fixed rod, a crossbar, a first lifting assembly, and a second lifting assembly. The fixed rod is fixedly connected to the second receiving portion 12, and the crossbar is fixedly connected to the second end of the curtain 32. The first end of the first lifting assembly and the first end of the second lifting assembly are respectively connected to the crossbar. The second end of the first lifting assembly and the second end of the second lifting assembly are both connected to the fixed rod and the lifting motor. The lifting motor can adjust the distance between the fixed rod and the crossbar through the first lifting assembly and the second lifting assembly.

[0106] In this way, the distance between the fixed rod and the crossbar can be adjusted by controlling the first and second lifting components through the lifting motor, so as to adjust the distance between the crossbar and the second receiving part 12, thereby realizing the raising or lowering of the curtain 32 while the first end of the curtain 32 is rotated by the rolling mechanism 31.

[0107] The fixing rod can be directly fixed to the outer wall of the second receiving part 12, or it can be fixed to the inner cavity of the second receiving part 12. In this way, when the fixing rod is fixed to the inner cavity of the second receiving part 12, after the screen 32 is rolled up, the first lifting assembly can drive the crossbar to be completely retracted into the interior of the second receiving part 12, thereby reducing the space occupied by the laser projection equipment.

[0108] Furthermore, the first end of the first lifting component and the first end of the second lifting component can be connected to the two ends of the crossbar, respectively, while the second ends of the first lifting component and the second lifting component can be connected to the two ends of the fixed rod, respectively. In this way, when the first lifting component and the second lifting component are raised and lowered, the supporting force on the crossbar can be evenly distributed, thereby improving the horizontality and stability of the crossbar, and thus improving the stability of the crossbar in supporting the curtain 32.

[0109] In some embodiments, a slide rail is provided on the fixed rod, and the first lifting assembly includes a first support rod and a second slider. The first end of the first support rod is connected to the crossbar, and the second end of the first support rod is connected to the second slider. The second slider is slidably disposed on the slide rail and is connected to a lifting motor. The lifting motor can drive the second slider to slide along the slide rail to adjust the angle between the first support rod and the fixed rod.

[0110] In this way, the lifting motor can drive the second slider to slide along the slide rail, so that the included angle between the first support rod and the fixed rod increases or decreases, thereby realizing the rise or fall of the first end of the first support rod, and thus the rise or fall of the crossbar.

[0111] The connection between the first end of the first support rod and the crossbar, and the connection between the second end of the first support rod and the second slider, can both be hinged. Of course, other connection methods can also be used, such as pin connection, as long as the first end of the first support rod and the crossbar can be rotated, and the second end of the first support rod and the second slider can be rotated. This application does not limit this.

[0112] The first lifting assembly may further include a first limiting block, which is fixed on the slide rail and can limit the movement of the first slider. For example, the first limiting block may be fixed at the edge of the slide rail, so that when the first slider moves along the slide rail to the edge of the slide rail, the first limiting block can limit the movement of the first slider to prevent it from falling off the slide rail.

[0113] Furthermore, the first support rod can be electrically connected to a lifting controller, which can control the first support rod to extend or shorten along its length. Thus, after the first slider moves to make the first support rod perpendicular to the crossbar, the lifting controller can control the first support rod to extend or shorten along its length, thereby adjusting the height of the crossbar and consequently the height of the curtain 32. For example, the first support rod can be a jack or similar device, as long as it can extend or shorten itself.

[0114] In other embodiments, a slide rail may be provided on the fixed rod. The first lifting assembly may include a first lifting rod, a second lifting rod, a first elastic element, a first push-pull rod, and a first slider. The first end of the first lifting rod and the first end of the second lifting rod are hinged to each other in a V-shape by the elastic element, and the distance between the second ends of the first and second lifting rods is compressible. The second end of the first lifting rod is hinged to a crossbar, and the second end of the second lifting rod is hinged to a fixed rod. The first end of the first push-pull rod is hinged to the outer wall of the second lifting rod, and the second end of the first push-pull rod is hinged to the first slider. The first slider is slidably mounted on the slide rail and connected to a lifting motor, which can drive the first slider to slide along the slide rail.

[0115] In this way, the lifting motor can drive the first slider to slide along the slide rail, so that the second end of the first push-pull rod can move synchronously through the first slider. The movement of the second end of the first push-pull rod causes the angle between the first push-pull rod and the slide rail to increase or decrease, thereby causing the first end of the first push-pull rod to rise or fall, so as to increase or decrease the angle between the second lifting rod and the slide rail. Then, as the angle between the second lifting rod and the slide rail increases or decreases, the angle of the V-shaped structure at the hinge of the first end of the second lifting rod and the first end of the first lifting rod will increase or decrease accordingly, thereby causing the second end of the first lifting rod to rise or fall, thus realizing the rise or fall of the first end of the first lifting assembly.

[0116] The first elastic element can be a torsion spring. After the first end of the first lifting rod and the first end of the second lifting rod are hinged to form a V-shaped structure through the first elastic element, the torsion spring provides elastic force so that the opening 121 of the V-shaped structure has a tendency to open, thereby giving the second end of the first lifting rod an upward tendency, which can provide support force for the crossbar at all times, so as to improve the support effect of the support frame.

[0117] Of course, the first elastic element can also be other elements, as long as they can make the opening 121 of the V-shaped structure have a tendency to open. This application embodiment does not limit this.

[0118] The two ends of the first elastic element can be welded to the outer walls of the first support rod and the second support rod, respectively. Of course, it can also be fixedly connected to the outer walls of the first support rod and the second support rod in other ways. As long as the two ends of the elastic element are fixedly connected to the outer walls of the first end of the first lifting rod and the first end of the second lifting rod, respectively, this application embodiment does not limit this.

[0119] In some embodiments, the lifting motor may include a motor body and a lead screw. The lead screw is mounted on a fixed rod, and one end of the lead screw is connected to the motor body. The first slider is threadedly connected to the lead screw. The motor body can drive the lead screw to rotate in the circumferential direction, so as to cause the first slider to slide along the slide rail in the axial direction of the lead screw.

[0120] In this way, when the motor shaft of the motor body rotates forward or reverse, the motor shaft of the motor body drives the lead screw to rotate forward or reverse synchronously, and then the lead screw drives the first slider to move forward or backward along the slide rail, thereby realizing the control of the motor body on the movement of the first slider along the slide rail.

[0121] The lead screw can be set in the groove 31221 of the slide rail and threadedly connected to the first slider. In this way, the threaded connection between the first slider and the lead screw and the sliding of the first slider along the slide rail can be realized at the same time, and space can be saved and installation is convenient.

[0122] The motor itself can be a stepper motor, which facilitates the control of the lifting controller. For example, the lifting controller can send control signals to the stepper motor to control its forward and reverse rotation. The stepper motor drives the lead screw to rotate forward and reverse, thereby switching the sliding direction of the first slider along the slide rail.

[0123] In other embodiments, the lifting motor may be a threaded screw stepper motor, the motor shaft of which is directly threaded to the first slider, thereby enabling the first slider to move along the slide rail.

[0124] In some embodiments, the first lifting assembly may further include a self-lubricating pad, which may be disposed between the first slider and the slide rail and is capable of moving synchronously with the first slider.

[0125] In this way, when the first slider moves along the slide rail, the self-lubricating pad can lubricate the first slider and the slide rail, thereby reducing the friction between the first slider and the slide rail, which can stabilize the moving speed of the first slider and reduce the load on the lifting motor.

[0126] The self-lubricating gasket can be a polyoxymethylene resin gasket. Of course, the self-lubricating gasket can also be other gaskets, as long as they can lubricate the first slider and the slide rail. This application does not limit this.

[0127] It should be noted that, in the embodiments of this application, the components and connection methods of the second lifting assembly may be the same as or similar to the components and connection methods of the first lifting assembly described in the first method above, or they may be the same as or similar to the components and connection methods of the first lifting assembly described in the second method above. The embodiments of this application do not limit this.

[0128] In this embodiment, the optical engine is housed within the cavity of the first accommodating part, and the curling mechanism is housed within the cavity of the second accommodating part. The first end of the screen is fixedly connected to the curling mechanism, achieving an integrated design of the optical engine and the screen, thus avoiding changes in their relative positions. Since the curling mechanism can control the screen to retract to the second accommodating part, and the second end of the screen can pass through the opening and unfold, the screen can be retracted or unfolded, avoiding the problem of the laser projection device occupying a large space when not in use. After the screen is unfolded, the beam emitted by the optical engine can pass through the light-transmitting area of ​​the first accommodating part and be projected onto the screen, thereby displaying the image. Furthermore, this embodiment determines the vertical distance between the plane containing the optical engine and the screen by using the transmittance of the optical engine and the width of the display area on the screen, ensuring that the beam emitted by the optical engine can be completely projected onto the display area, thereby improving the display effect.

[0129] The above description is merely an illustrative embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A laser projection device, characterized in that, The laser projection device includes: The storage section has a first accommodating section and a second accommodating section; the storage section has a T-shaped structure, and the volume of the first accommodating section is smaller than the volume of the second accommodating section; the first accommodating section and the second accommodating section are detachably connected; the first accommodating section and the second accommodating section are connected by a telescopic rod; An optical engine is disposed within the inner cavity of the first accommodating portion, the first accommodating portion having a light-transmitting area, and the light beam emitted by the optical engine can pass through the light-transmitting area; the vertical distance between the center point of the light-transmitting area on the first accommodating portion and the opening on the second accommodating portion is adjustable to accommodate optical engines with different projection ratios. A projection screen, comprising a roll-up mechanism, a lifting mechanism, and a screen; The curling mechanism is located in the inner cavity of the second accommodating part and includes a curling motor and a roller. The first end of the curtain is fixedly connected to the roller, and the curling motor drives the roller to rotate. The lifting mechanism includes a support frame and a lifting motor. The first end of the support frame is fixed in the inner cavity of the second accommodating part, and the second end of the support frame is fixedly connected to the second end of the curtain. The lifting motor adjusts the distance between the second end of the support frame and the second accommodating part. The second receiving portion is provided with an opening; When the laser projection device is started or stopped, the roll-up motor and the lifting motor start simultaneously. The roll-up motor drives the roller to rotate, and the lifting motor drives the second end of the support frame to rise or fall. The second end of the screen unfolds or rolls up through the opening.

2. The laser projection device as described in claim 1, characterized in that, The first end of the support frame is fixed to the inner cavity of the second accommodating part, and the second end of the support frame can be locked at the opening when the curtain is rolled up.

3. The laser projection device as described in claim 2, characterized in that, The support frame includes a fixed rod, a crossbar, and a lifting assembly. The fixed rod is fixedly connected to the second receiving part, and the crossbar is fixedly connected to the second end of the curtain. The first end of the lifting assembly is connected to the crossbar, and the second end of the lifting assembly is connected to the fixed rod and the lifting motor; The lifting motor controls the lifting assembly to adjust the distance between the fixed rod and the crossbar.

4. The laser projection device as described in claim 3, characterized in that, The fixing rod is fixed in the inner cavity of the second accommodating part. After the curtain is rolled up, the lifting assembly drives the horizontal bar to be completely retracted into the interior of the second accommodating part.

5. The laser projection device as described in claim 3, characterized in that, The lifting assembly includes a first lifting assembly and a second lifting assembly. The first ends of the first lifting assembly and the second lifting assembly are respectively connected to the two ends of the crossbar, and the second ends of the first lifting assembly and the second lifting assembly are respectively connected to the two ends of the fixed rod.

6. The laser projection device as described in any one of claims 1-5, characterized in that, The curling mechanism also includes a curling controller, which is electrically connected to the curling motor and controls the start and stop of the curling motor; The lifting mechanism also includes a lifting controller, which is electrically connected to the lifting motor and controls the start and stop of the lifting motor; The lifting controller and the curling controller are the same controller.

7. The laser projection device as described in any one of claims 1-5, characterized in that, The length of the display area on the screen along the length direction of the opening is less than or equal to the width of the screen.

8. The laser projection device as described in any one of claims 1-5, characterized in that, The screen includes a fabric body and an optical film; The first end of the fabric is fixedly connected to the curling mechanism, and the second end of the fabric can extend out of the second receiving portion and unfold along the opening; The optical film is fixed on the fabric and serves as the display area.

9. The laser projection device as described in claim 8, characterized in that, The length of the optical film is less than the length of the fabric, and the optical film is fixed to the side of the curtain near the second end.

10. The laser projection device as described in claim 1, characterized in that, The optical engine is an ultra-short focal length optical engine.

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