1. A laser projection device, characterized in that the laser projection device comprises:

an optical engine to emit a light beam;

a projection screen comprising an optical film, a rollable substrate, and a flexible carrier;

the optical film is adhered to the curled substrate and used for reflecting the light beams emitted by the optical engine so as to display a picture;

the rollable substrate is bonded to the flexible carrier; the length of flexible carrier is greater than the length of curlable base plate, all with stretching mechanism fixed connection along the relative first side of length direction and second side on the flexible carrier, just stretching mechanism can be based on first side with the second side is taut the flexible carrier is in order to be in the horizontality.

2. The laser projection device of claim 1, wherein a side of the rollable substrate away from the optical film is provided with a plurality of ribs;

the plurality of reinforcing ribs are bonded with the flexible carrier, and the length direction of each reinforcing rib is parallel to the first side edge.

3. The laser projection device of claim 1, wherein the rollable substrate is integrally formed with the plurality of ribs,

alternatively, the first and second electrodes may be,

the plurality of reinforcing ribs are bonded to the rollable substrate, or the plurality of reinforcing ribs are fixed to the rollable substrate by screws.

4. The laser projection device as claimed in any of claims 1-3, wherein the plurality of ribs are connected by at least two flexible hinges.

5. The laser projection device of claim 4, wherein each flexible hinge extends through the plurality of ribs in a direction perpendicular to a thickness of the ribs, and the at least two flexible hinges are parallel or cross each other.

6. A laser projection device as claimed in any of claims 1 to 3 wherein each rib is parallel to each other in the length direction and parallel to the width direction of the rollable substrate.

7. The laser projection apparatus of claim 6, wherein each rib has a length equal to a length of a side edge of the rollable substrate in the width direction.

8. A laser projection device as claimed in any one of claims 1 to 3, wherein the rollable substrate is provided with a protective coating on a side remote from the optical film.

9. A laser projection device as claimed in any of claims 1 to 3, wherein the hardness of the rollable substrate is between 60 and 70 rockwell.

10. The laser projection apparatus of any of claims 1-3, wherein the rollable substrate is PC, PVC, PET with a thickness in the range of 0.75-1.2 mm.

11. The laser projection device of any of claims 1-3, wherein the laser projection device further comprises a holder, and the stretching mechanism comprises a crimping assembly, a lifting assembly;

the curling assembly is fixed on the fixed seat, the first side edge of the curlable substrate is fixedly connected with the curling assembly, and the curling assembly can control the optical membrane and the curlable substrate to curl on the curling assembly;

the first end of the lifting component is fixedly connected with the fixed seat, the second end of the lifting component is fixedly connected with the second side edge corresponding to the first side edge of the curlable substrate, and the lifting component can control the curlable substrate to be unfolded.

12. The laser projection device as claimed in claim 11, wherein the optical engine is further disposed in the fixing base, and when the projection screen is in the extended state, the optical engine has a fixed preset distance from the projection screen.

Background

With the continuous development of science and technology, laser projection equipment is more and more applied to the work and the life of people. Currently, a laser projection apparatus mainly includes an optical engine and a projection screen. The projection screen comprises an optical diaphragm, a back plate and a fixed frame. The optical film is bonded on the back plate, and the fixed frame is wrapped around the optical film and the back plate. The optical engine is mainly used for emitting light beams to the optical film, and the optical film is used for receiving the light beams emitted by the optical engine so as to display pictures.

Projection devices generally use optical screens for their screens in pursuit of better projection results. For example, the fresnel optical film has a certain softness, and the optical film cannot maintain the flatness of a large area when being unfolded, so a back plate with a size equivalent to that of the optical film is usually provided to maintain the flatness of the optical film. As shown in fig. 6, specifically, the back plate type fixing structure includes a decorative frame 601 and a flat back support plate 604, the hard optical film 602 and the back support plate 604 are bonded and fixed by an adhesive 603, and the decorative frame 601 is connected to the back support plate 604, so as to complete the supporting and fixing of the hard optical film 602, and thus the rigidity of the back support plate 604 can maintain the flatness of the hard optical film 602, and prevent the hard optical film 602 from deforming.

However, adopt monoblock backplate formula fixed knot to construct and fix optical diaphragm, on the one hand, back support plate's area is great, adds man-hour, and deformation such as bulging takes place for the large-size panel easily, and simultaneously, the unevenness that the inhomogeneous coating also can cause the laminating when optical screen passes through sticky backplate panel to influence the roughness of monoblock hard curtain, and then lead to bonding optical diaphragm's on the backplate surface unsmooth, thereby influence projection screen's display effect. On the other hand, the back plate type fixing mode also causes the whole screen to have very large weight, is inconvenient to transport and hang, can not be moved after being installed, is always in an unfolded state and occupies larger volume.

There is a need for a projection screen that is convenient to store and install and that also maintains a good flatness.

Disclosure of Invention

The application provides a laser projection equipment provides a projection screen that can curl and accomodate, and can solve the problem that fold and deformation appear easily in projection screen use. The technical scheme is as follows:

a laser projection device, the laser projection device comprising:

an optical engine for emitting a light beam;

a projection screen comprising an optical film, a rollable substrate, and a flexible carrier;

the optical film is adhered to the curlable substrate and used for reflecting the light beam emitted by the optical engine to display a picture;

the rollable substrate is bonded to the flexible carrier; the length of flexible carrier is greater than the length of curlable base plate, and the relative first side and the second side of edge length direction all with stretching mechanism fixed connection on the flexible carrier, and stretching mechanism can be based on the taut flexible carrier in order to be in the horizontality of first side and second side.

The technical scheme provided by the application has the beneficial effects that at least:

the retractable projection screen is provided, so that the projection screen can be stored, and the use convenience of the projection screen is improved. In the projection screen, the flexible carrier carries the optical film and the rollable substrate, the length of the flexible carrier is greater than that of the optical film and the rollable substrate, the flexible carrier has a first side and a second side in the length direction, so that the stretching mechanism can stretch the flexible carrier based on the first side and the second side of the flexible carrier, the rollable substrate is in a flat and stretched state due to being bonded to the flexible carrier, and the optical film is also in a flat state due to being bonded to the rollable substrate. And the flexible carrier can bear part of the tension force of the stretching mechanism, so that the optical diaphragm and the rollable substrate are indirectly tensioned, the stress difference of the optical diaphragm and the rollable substrate at each position in the transverse direction is reduced, the flatness of the whole projection screen is improved, and the service life of the projection screen can be prolonged.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1-1 is a schematic structural diagram of a laser projection apparatus according to an embodiment of the present disclosure;

fig. 1-2 are schematic structural diagrams of a laser projection apparatus provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of a front view of a projection screen according to an embodiment of the present disclosure;

fig. 3 is a schematic rear view of a projection screen according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a rollable substrate according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram illustrating a backside structure of a rollable substrate according to an embodiment of the present disclosure;

fig. 6 is a schematic cross-sectional view of a projection screen according to the prior art.

Reference numerals:

1: an optical engine; 2: a projection screen; 3: fixed seat

21: an optical film; 22: a rollable substrate; 23: a flexible carrier; 24: a stretching mechanism; 25: reinforcing ribs; 26: flexible hinge

241: a crimping assembly; 242: a lifting assembly; 243: a fixed seat;

601: frame, 602: an optical film; 603: an adhesive; 604: and supporting the plate.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1-1 illustrates a schematic structural diagram of a projection device according to an embodiment of the present application, fig. 2 illustrates a schematic structural diagram of a front view of a projection screen according to an embodiment of the present application, and fig. 3 illustrates a schematic structural diagram of a rear view of a projection screen according to an embodiment of the present application. Fig. 4 and 5 are schematic diagrams illustrating a rear structure of a rollable substrate in a projection screen, respectively.

As shown in fig. 1-1, 2 and 3, the projection apparatus includes: an optical engine 1 and a projection screen 2, the optical engine 1 is used for emitting light beams, and the projection screen 2 comprises an optical film 21, a rollable substrate 22, a flexible carrier 23 and a stretching mechanism 24; the optical film 21 is adhered to the rollable substrate 22, the optical film 21 is used for reflecting the light beam emitted by the optical engine 1 so as to display a picture, and the rollable substrate 22 can support the optical film 21 to be in a flat state; the rollable substrate 22 is adhered to the flexible carrier 23, opposite first and second sides of the flexible carrier 23 are fixedly connected to the stretching mechanism 24, and the stretching mechanism 24 can stretch the flexible carrier 23 based on the first and second sides to be in a flat state.

In the embodiment of the present application, since the optical film 21 is bonded to the rollable substrate 22, the rollable substrate 22 and the optical film 21 are both supported on the flexible carrier 23, and the length of the flexible carrier is greater than the lengths of the optical film 21 and the rollable substrate 22, and the flexible carrier 23 has the first side and the second side in the length direction, so that the stretching mechanism can stretch the flexible carrier based on the first side and the second side of the flexible carrier, the rollable substrate is in a flat stretching state due to being bonded to the flexible carrier, and the optical film is also in a flat state due to being bonded to the rollable substrate, while indirectly stretching the optical film and the rollable substrate, the flexible carrier can bear a part of the stretching force of the stretching mechanism, and the stress difference between the optical film and the rollable substrate in each position in the transverse direction is reduced, so that the optical film 21 is not prone to wrinkle and deformation due to uneven stress, the flatness of the optical film 21 can be ensured, thereby improving the display effect of the projection screen 2.

The optical engine 1 may be an ultra-short-focus optical engine, and of course, the optical engine 1 may also be a short-focus optical engine or a long-focus optical engine.

The optical engine 1 may include a light source, an optical mechanical system, a lens, a DMD (Digital Micromirror array) chip, a control circuit board, an audio processing system, a sound Device, a heat dissipation system, and a heat sink, where the light source and the lens are both fixedly connected to the optical mechanical system, the DMD chip is disposed in the optical mechanical 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 further electrically connected to the sound Device, and the heat dissipation system is further electrically connected to the heat sink.

Thus, the light beam emitted from the light source is emitted to the DMD chip in the optical-mechanical system, the control circuit board modulates the light beam emitted to the DMD chip by controlling the DMD chip, and emits the modulated light beam to the lens carrying the image information output by the control circuit board, and further emits the light beam to the optical film 21 included in the projection screen 2 through the lens for displaying. In addition, the control circuit board controls the audio processing system to process the audio information output by the control circuit board, and the processed audio information is played outside through the sound box. When the image information is displayed and the audio information is externally displayed, the control circuit board can control the heat dissipation system to drive the heat sink to dissipate heat, so that the function of each device is prevented from being influenced by high temperature.

The optical film 21 may be a synthetic cloth, a film, a fresnel optical film, a black grid screen, a white plastic screen, or the like. When the optical film 21 is a thin film, the material of the optical film 21 may be PET (Polyethylene Terephthalate). The PET has strong corrosion resistance, high tensile strength and tearing strength, and excellent high temperature resistance, friction resistance and dimensional stability, so that the long service life of the optical film 21 can be ensured. Of course, the material of the optical film 21 may also be other materials, for example, when the optical film 21 is a fresnel optical film, the material may be synthetic resin, which is not limited in the embodiment of the present application.

The flexible carrier 23 may be a carrier such as a synthetic cloth or a film that can be easily rolled and has a load-bearing strength. When the flexible carrier 23 is a synthetic cloth, the material of the flexible carrier 23 may be a synthetic material containing nylon. Because the nylon material has high mechanical strength, good toughness and higher tensile strength and compressive strength, the flexible carrier 23 is not easy to deform when being tensioned by the stretching mechanism 24, and has a flat surface, so that the flatness of the rollable substrate 22 and the optical membrane 21 can be improved. Of course, the material of the flexible carrier 23 may be other materials, which is not limited in the embodiments of the present application.

The rollable substrate 22 may be a thin plate with a small thickness, which facilitates rolling, and reduces the thickness of the projection screen 2, so that the projection screen 2 is more beautiful. The material of the rollable substrate 22 may be metal, PP (Polypropylene), PC (Polycarbonate), PI (Polyimide), or the like, and may be PET or PVC. In one embodiment, the thickness of the rollable substrate is in the range of 0.75mm to 1.2mm, and the rollable substrate also meets the requirement of flatness when being unfolded, for example, the requirement of flatness of 2 ‰isrequired. The embodiments of the present application do not limit this.

The hardness of the rollable substrate 22 may be set to a hardness that is easily curled, and for example, the hardness of the rollable substrate 22 may be between 60-70 rockwell hardness, which may facilitate the rolling and tensioning of the rollable substrate 22 at any time so as to bring the rolling and tensioning of the optical membrane 21.

The rollable substrate 22 may be manufactured by die rolling, extrusion, or the like, or may be manufactured by other methods, which is not limited in the present embodiment.

It should be noted that the surface of the rollable substrate 22 on the side close to the optical film 21 may be a flat surface to ensure the flatness of the optical film 21 bonded to the rollable substrate 22. The surface of the rollable substrate 22 on the side away from the optical film 21 may be a flat surface, or may be an uneven surface according to actual conditions, which is not limited in the embodiment of the present application.

The optical film 21 and the rollable substrate 22, and the rollable substrate 22 and the flexible carrier 23 may be bonded by a double-sided tape or an adhesive film, or may be bonded by other methods, which is not limited in this embodiment. One side of the rollable substrate 22 adjacent to the first side of the flexible carrier 23 can be fixedly attached to the tensioning mechanism 24 by screws. The rollable substrate 22 may be connected only to the optical film 21 or only to the stretching mechanism 24, and of course, the rollable substrate 22 may also be connected to both the optical film 21 and the stretching mechanism 24, which is not limited in the embodiment of the present application. In addition, the rollable substrate 22 and the optical film 21, and the rollable substrate 22 and the stretching mechanism 24 may be fixed by other methods, which is not limited in the embodiment of the present application.

It should be noted that the side length of the optical film 21 may be equal to the corresponding side length on the rollable substrate 22, and of course, the side length of the optical film 21 may also be smaller than the corresponding side length on the rollable substrate 22 as long as the optical film 21 can be completely attached to the rollable substrate 22, which is not limited in the embodiment of the present application.

In some embodiments, as shown in fig. 4, the side of the rollable substrate 22 away from the optical film 21 may be provided with a plurality of strengthening ribs; a plurality of ribs 25 are bonded to the flexible carrier 23, each rib 25 being in the form of a strip, and the length direction of each rib 25 being parallel to the first side.

Thus, the plurality of ribs 25 can increase the strength of the rollable substrate 22, and the rollable substrate 22 can more stably support the optical film 21. This is because, in practice, the applicant found that, in the process of using the rollable screen, the lifting mechanism usually has a large pulling force on the middle part of the screen, the edge position of the screen is subjected to a small force, and the force applied on the whole screen is not uniform, so that the screen is pulled up to generate V-shaped ripples and wrinkles. Therefore, in an embodiment, the rollable substrate 22 provided with the plurality of ribs 25 may be horizontally oriented perpendicular to the direction of the applied force to the screen, or the strength of the rollable substrate in the transverse direction of the screen is increased, so that when the screen is pulled in the up-down direction, the transverse force applied to the rollable substrate 22 is easily ensured to be consistent in each position, the optical film 21 is fixed to the rollable substrate, the flatness of the optical film 21 is also ensured, the phenomena of V-shaped ripples and wrinkles are avoided or greatly reduced, and the service life of the rollable screen can be greatly prolonged. Since the length direction of each rib 25 is parallel to the first side, the curling of the rollable substrate 22 toward the direction in which the first side is located can be facilitated.

The material of the reinforcing rib 25 may be metal, PP (Polypropylene), PC (Polycarbonate), PI (Polyimide), or other materials, and certainly, the material may also be other materials, which is not limited in this embodiment. The reinforcing ribs 25 may be rectangular or trapezoidal long reinforcing ribs 25 in cross section, or may be reinforcing ribs 25 in other shapes, which is not limited in the embodiment of the present application.

The material of the rib 25 may be the same as or different from the material of the rollable substrate 22. For example, when the material of the bead 25 is the same as that of the rollable substrate 22, the material of both the bead 25 and the rollable substrate 22 may be PP. When the material of the reinforcing rib 25 is different from that of the rollable base plate 22, the material of the rollable base plate 22 may be PP, the plurality of reinforcing ribs 25 may be made of a metal material, the rollable base plate 22 made of the PP material is more convenient to bend relative to the rollable base plate 22 made of the metal material, and the reinforcing ribs 25 made of the metal material have higher strength relative to the reinforcing ribs 25 made of the PP material, so that the rollable base plate 22 provided with the reinforcing ribs 25 is not only convenient to bend, but also has higher strength.

It should be noted that parameters such as the thickness and width of each rib 25 and the distance between two adjacent ribs 25 may be set based on parameters such as the curl diameter and the curl tightening force of the rollable substrate 22. When the curling diameter and the curl tightening force of the rollable substrate 22 are large, the thickness and the width of each reinforcing bead 25 and the pitch between the adjacent reinforcing beads 25 can be increased appropriately, which is not limited in the embodiment of the present application.

In some embodiments, the plurality of ribs 25 may be bonded to the rollable substrate 22, or may be fixed to the rollable substrate 22 by screws. Of course, the plurality of ribs 25 may be fixed to the rollable substrate 22 by riveting, ultrasonic welding, hot melting, or the like, which is not limited in the embodiment of the present application.

In other embodiments, rollable substrate 22 can be integrally formed with a plurality of ribs 25. The rollable substrate 22 may be integrally formed with the plurality of ribs 25 by die rolling, extrusion, or the like. Of course, the rollable substrate 22 with the plurality of ribs 25 may be formed by cutting or the like, which is not limited in the embodiment of the present application.

In some embodiments, as shown in fig. 5, the plurality of stiffening ribs 25 may be connected by at least two flexible hinges 26. The flexible hinge 26 may be a chain structure formed by hinging a plurality of short sections, so that the mechanical strength is high, the bending is convenient, and the flexibility is high, so that the reinforcing ribs 25 connected to the flexible hinge are not easy to fall off.

In some embodiments, each flexible hinge may extend through a plurality of ribs 25 in a direction perpendicular to the thickness of the ribs 25, with at least two flexible hinges being parallel or intersecting each other. Thus, the flexible hinge can more effectively fix the plurality of reinforcing ribs 25 and can make the stress of the plurality of reinforcing ribs 25 more uniform.

It should be noted that, in the case where the plurality of reinforcing ribs 25 are connected by at least two flexible hinges, the distance between two adjacent reinforcing ribs 25 may be reduced according to the actual curling condition, and for example, the distance between two adjacent reinforcing ribs 25 may be set to 2mm or 3 mm. Thus, the plurality of ribs 25 and the at least two flexible hinges can be combined into a rollable curtain-shaped reinforcing plate, and the distance between two adjacent ribs 25 is small, so that the surface of the curtain-shaped reinforcing plate is relatively flat, the rollable base plate 22 can be removed, and the optical film 21 is directly adhered to the curtain-shaped reinforcing plate, thereby reducing the thickness of the projection screen 2. That is, the projection screen 2 may include only the optical film 21, the curtain-like reinforcing plate composed of the plurality of reinforcing ribs 25 and at least two flexible hinges, the flexible carrier 23, and the stretching mechanism 24.

It should also be noted that rounded corners may be provided at all the lateral edges of the ribs 25 to accommodate the change in the angle between two adjacent ribs 25, thereby enhancing the flexibility of the curtain-like reinforcing plate when it is curled.

In some embodiments, as shown in fig. 4, the length of each rib 25 is equal to the length of one side of the rollable substrate 22 that is parallel to the first side. In this way, each reinforcing rib 25 can more sufficiently reinforce the rollable base plate 22.

Of course, the length of each rib 25 may be adjusted to a small extent according to actual conditions, which is not limited in the embodiment of the present application. For example, the plurality of reinforcing ribs 25 may also be arranged in a matrix of reinforcing ribs 25 in multiple rows and multiple columns, and the length direction of each reinforcing rib 25 may be parallel to the length direction of the first side, so that the sum of the lengths of the plurality of reinforcing ribs 25 located on the same straight line parallel to the first side may be equal to the length of a side parallel to the first side on the rollable substrate 22, or of course, may be slightly smaller than the length of a side parallel to the first side on the rollable substrate 22, which is not limited in the embodiment of the present application.

In some embodiments, as shown in fig. 4, each of the ribs 25 is parallel to each other in the length direction and parallel to the width direction of the rollable substrate 22. In this way, each of the reinforcing ribs 25 parallel to each other can make the force applied to the rollable substrate 22 in the height direction more uniform, thereby enhancing the flatness and stability of the rollable substrate 22. Further, the length direction of each reinforcing rib 25 is parallel to the width direction of the rollable substrate 22, so that the force applied to the rollable substrate 22 in the width direction is more uniform, and the flatness and stability of the rollable substrate 22 can be further improved by the reinforcing ribs 25. The width direction of the rollable substrate 22 is a direction parallel to the horizontal direction on the rollable substrate 22.

In some embodiments, the side of the rollable substrate 22 away from the optical film 21 may be provided with a protective coating. In this way, the protective coating can prevent the surface of the rollable substrate 22 away from the optical film 21 from being in direct contact with the optical film 21 when the rollable substrate 22 is in a rolled state, so that the surface of the rollable substrate 22 can be prevented from scratching the optical film 21 due to unsmooth or other reasons, and the service life of the optical film 21 can be prolonged. The protective coating may be a coating composed of flexible particles, or may be a colloidal coating, which is not limited in the embodiment of the present application. The protective coating can be made of a nano material, the nano material has good toughness, impact resistance and thermal stability, and after the protective coating is contacted with the optical membrane 21, the flatness, wind resistance and stability of the optical membrane 21 can be improved, and the service life of the optical membrane 21 can be prolonged.

In some embodiments, as shown in fig. 3, the stretching mechanism 24 may include a crimping assembly 241, a lifting assembly 242, and a receiving base 243; the curling element 241 is fixed on the accommodating base 243, the first side of the flexible carrier 23 is fixedly connected with the curling element 241, and the curling element 241 can control the optical film 21, the rollable substrate 22 and the flexible carrier 23 to curl on the curling element 241; the first end of the lifting assembly 242 is fixedly connected to the receiving base 243, the second end of the lifting assembly 242 is fixedly connected to the second side of the flexible carrier 23, and the lifting assembly 242 can control the optical film 21, the rollable substrate 22 and the flexible carrier 23 to be unfolded to be in a flat state.

The receiving base 243 may be fixedly connected to the mounting surface to fix the projection screen 2. The mounting surface may be a support surface of a fixing bracket or a wall surface of a wall body, as long as the fixing support of the projection screen 2 can be realized.

In some embodiments, the curling assembly 241 may include a curling controller, a curling motor, and a winding drum, the curling controller is electrically connected to the curling motor, the curling motor may be fixed to the receiving base 243, an output shaft of the curling motor is fixedly connected to an end of the winding drum, and the first side of the flexible carrier 23 is fixedly connected to the winding drum. Wherein, the start-stop of curling motor can be controlled to the controller that curls, can drive the reel rotation after the curling motor starts. In this way, when the roll controller controls the roll to rotate, the optical film 21, the rollable substrate 22, and the flexible carrier 23 can be controlled to be rolled on the roll.

The curling controller can control the curling motor to rotate in the forward direction or the reverse direction when receiving a control signal sent by a remote controller in communication connection with the curling controller. Of course, the curling controller can also be electrically connected with a control key, and then a control signal can be sent to the curling controller through the control key so as to control the forward rotation or the reverse rotation of the curling motor. The curling controller can comprise a single chip microcomputer and a signal receiver, the single chip microcomputer is respectively electrically connected with the signal receiver and the curling motor, in this way, after the signal receiver receives a control signal, the signal receiver sends the control signal to the single chip microcomputer, and the single chip microcomputer controls the curling motor to rotate forwards or backwards based on the control signal.

The end parts of the coiling motor and the coiling drum can be relatively limited along the circumferential direction, so that the coiling drum can rotate synchronously along with the coiling motor. In addition, the winding drum can move axially relative to the winding motor, and therefore the winding drum can be detached.

When realizing being connected of crimping motor and reel, in some embodiments, the inner wall of reel can be provided with the wedge groove along the axial, can be provided with the voussoir on the motor shaft of crimping motor, and the voussoir can be followed the circumferencial direction chucking of reel and in the wedge groove to can realize that crimping motor's motor shaft and reel are fixed along the circumferencial direction, and then the synchronous rotation can be realized to reel and crimping motor's motor shaft.

The section of the wedge groove formed in the inner wall of the winding drum may be rectangular or trapezoidal, and may be of other shapes as long as the torque of the winding motor can be transmitted, which is not limited in the embodiments of the present application.

The number of the wedge grooves arranged on the inner wall of the winding drum can be one or more, and when the number of the wedge grooves is more, the wedge grooves can be distributed along the circumferential direction of the winding drum. The specific number of wedge grooves is set according to different torques transmitted by the coiling motor, so long as the torque of the coiling motor can be transmitted to the winding drum, and the winding drum has a certain service life, and the embodiment of the application does not limit the torque.

It should be noted that the crimping motor may be a stepper motor, which may facilitate control of the crimping motor by the crimping controller. For example, the curl controller may control the forward rotation and the reverse rotation of the stepping motor by sending a control signal to the stepping motor, so as to drive the winding drum to rotate forward and reverse.

Of course, the curling motor may be other motors, such as a dc speed reduction motor, as long as the motor can be conveniently controlled by the curling controller, which is not limited in the embodiment of the present application.

In other embodiments, the curling motor may include a motor body and a roller, the motor body is electrically connected to the curling controller, a motor shaft of the motor body is fixedly connected to the roller, a groove is axially formed in the circumferential surface of the roller, a boss matched with the groove is formed in the inner wall of the winding drum, and the boss can be limited in the groove.

Like this, the inner chamber of reel is packed into to the gyro wheel that will fix on the motor shaft of motor body to make recess on the gyro wheel and the boss cooperation of reel inner chamber, transmit the epaxial moment of torsion of motor shaft of motor body to the reel through the gyro wheel, thereby can realize the synchronous rotation of reel and motor body's motor shaft, and then realize the synchronous rotation of reel and crimping motor.

The section of the boss disposed on the inner wall of the winding drum may be rectangular or trapezoidal, and of course, may be other shapes as long as the torque of the winding motor can be transmitted, which is not limited in the embodiment of the present application.

The number of the bosses arranged on the inner wall of the winding drum can be one or multiple, and when the number of the bosses is multiple, the bosses can be arranged along the circumferential direction of the winding drum. The concrete quantity of boss sets up according to the difference of the moment of torsion that motor body transmitted, as long as can guarantee to transmit motor body's moment of torsion to the reel, and this reel has certain life can, and this application embodiment does not limit to this.

It should be noted that the motor body may be a stepping motor, which may facilitate the control of the curling motor by the curling controller. Of course, the motor body may be other motors as long as the motor body can be conveniently controlled by the curl controller, and the embodiment of the present application does not limit this.

It should be noted that, in addition to the two embodiments described above, the motor shaft of the winding motor and the winding drum can be synchronously rotated, and the motor shaft of the winding motor and the winding drum can also be synchronously rotated through other structures, which is not limited in the embodiments of the present application.

When realizing the fixed of flexible carrier and reel, in some embodiments, the outer wall of reel can be provided with the draw-in groove along the axial, and the first side of flexible carrier 23 can be provided with the card strip that matches with the draw-in groove, and the card strip can be followed the radial spacing in the draw-in groove of reel to can realize that the first side of flexible carrier 23 is along the circumferencial direction of reel spacing.

Thus, when the winding drum rotates, the first side edge of the flexible carrier 23 and the winding drum can be synchronously curled through the limiting of the clamping strip, and the flexible carrier 23 can be curled on the winding drum. And because the spacing of card strip, can make the reel provide certain pulling force to the first side of flexible carrier 23, this pulling force can mutually support under the effect when expanding with the second side of flexible carrier 23, makes flexible carrier 23 more level and smooth to improve the display effect of the optics diaphragm 21 that sets up on flexible carrier 23.

Wherein, the cross-section of draw-in groove and the cross-section of card strip can all be the shape of falling T structure, like this, when draw-in groove and card strip fixed connection, can directly insert the draw-in groove with the card strip along the length direction of draw-in groove to carry on spacingly to the draw-in groove, realize the fixed connection of card strip and draw-in groove, thereby can convenient and fast fix flexible carrier 23's first side on the reel.

It should be noted that, the cross section of the clamping groove and the cross section of the clamping strip may be square, except for being in an inverted T shape, and of course, may also be in other shapes as long as the clamping groove can limit the clamping strip along the circumferential direction of the winding drum, which is not limited in the embodiment of the present application.

Wherein, the depth of the clamping groove can be equal to the height of the clamping strip. Like this, when the reel rotates and drives flexible carrier 23 and curl, flexible carrier 23 can hug closely on the reel to when having avoided the height of card strip to be greater than or be less than the degree of depth of draw-in groove, flexible carrier 23 receives the phenomenon of the shearing force of the edge of card strip or draw-in groove.

It should be noted that, besides the limitation of the first side edge of the flexible carrier 23 in the circumferential direction of the winding drum through the matching of the clamping groove and the clamping strip, the limitation of the first side edge of the flexible carrier 23 in the circumferential direction of the winding drum can be realized through the bonding of the outer wall of the winding drum and the first side edge of the flexible carrier 23, and of course, the limitation of the first side edge of the flexible carrier 23 in the circumferential direction of the winding drum can also be realized through other modes, which is not described in detail herein in the embodiments of the present application.

It should be noted that, when the flexible carrier is fixedly connected to the winding drum, in order to reduce the tension force acting on the flexible carrier when the winding drum curls the flexible carrier, a side edge of the rollable substrate 22 close to the winding drum may be fixedly connected to the winding drum through a screw, so that the tension force on a part of the flexible carrier 23 may be shared by fixing the rollable substrate to the winding drum, and further the flexible carrier 23 is not easily deformed, thereby ensuring the stability of the flexible carrier 23, and further enhancing the stability of the rollable substrate 22, so that the substrate is not easily shaken.

In some embodiments, the lifting assembly 242 may include a lifting controller, a lifting motor, a support frame, and an elongated rigid frame, wherein the lifting controller is electrically connected to the lifting motor, the lifting motor and the support frame are respectively fixed to the receiving base 243 at first ends, and the support frame is connected to the elongated rigid frame at a second end. The length direction of the elongate rigid frame may coincide with the length direction of the second side of the flexible carrier 23, and the length of the elongate rigid frame may be equal to the length of the second side of the flexible carrier 23. Like this, rectangular rigid frame can with flexible carrier 23's second side fixed connection, and rectangular rigid frame can carry on spacingly along length direction to flexible carrier 23 to guarantee flexible carrier 23's planarization. The start-stop of elevator motor can be controlled to the lift controller, and elevator motor can adjust the second end of support frame and the distance between the subassembly 241 that curls, and then the support frame can be based on being connected of rectangular rigid frame and flexible carrier 23, and control optics diaphragm 21, can curl base plate 22 and flexible carrier 23 and expand and be in the horizontality.

Like this, after lift controller control elevator motor started, elevator motor can drive the second end of support frame and rise, and then drives the second side of flexible carrier 23 and rise, can realize the expansion of flexible carrier 23 when curling subassembly 241 control flexible carrier 23 counter rotation this moment. In addition, when the second end of the support frame driven by the lifting motor descends, the second side edge of the flexible carrier 23 can be driven to descend, and at the moment, the flexible carrier 23 controlled by the curling component 241 can be folded up while rotating in the forward direction.

The lifting controller can control the lifting motor to rotate in the forward direction or rotate in the reverse direction when receiving a control signal sent by a remote controller in communication connection with the lifting controller so as to control the lifting or descending of the support frame. Of course, the lifting controller can also be electrically connected with a control key, and at the moment, a control signal can be sent to the lifting controller through the control key so as to control the lifting or descending of the support frame through the forward rotation or reverse rotation of the lifting motor.

Wherein, the lifting controller can include singlechip and signal receiver, and the singlechip is connected with signal receiver and elevator motor electricity respectively, and like this, after signal receiver received control signal, signal receiver sends control signal to singlechip, and the singlechip is based on this control signal control elevator motor's corotation or reversal.

It should be noted that when the structure of the curling element 241 is as described above, the lifting controller and the curling controller may be the same controller. Thus, when the projection device is started, after the same controller receives a starting signal sent by a remote controller in communication connection with the same controller, the curling motor and the lifting motor can be controlled to be started simultaneously based on the starting signal, at the moment, the curling motor drives the winding drum to synchronously rotate reversely, and the lifting motor drives the second end of the support frame to ascend, so that the flexible carrier 23, the rollable substrate 22 and the optical film 21 are jointly unfolded. When the projection device is turned off, after the same controller receives a turn-off signal sent by a remote controller in communication connection with the same controller, the curling motor and the lifting motor can be controlled to be started simultaneously based on the turn-off signal, at the moment, the curling motor drives the winding drum to rotate forward synchronously, and the lifting motor drives the second end of the support frame to descend, so that the flexible carrier 23, the rollable substrate 22 and the optical film 21 are curled together.

It should be further noted that, when the flexible carrier 23, the rollable substrate 22 and the optical film 21 are jointly unfolded, the height to be raised of the second side edge of the flexible carrier 23 may be designed in advance, and then the operation duration of the rolling motor and the lifting motor is controlled in advance according to the height, that is, when the same controller receives a start signal, the second side edge of the flexible carrier 23 may be automatically controlled to be raised to the required height within the operation duration, so as to completely unfold the flexible carrier 23, the rollable substrate 22 and the optical film 21; or automatically controlling the second side of the flexible carrier 23 to curl onto the roll during the running time period upon receiving the closing signal to achieve full retraction of the flexible carrier 23, the rollable substrate 22, and the optical film 21. Of course, it is also possible to achieve complete deployment or retraction of the flexible carrier 23, the rollable substrate 22 and the optical film 21 by manually controlling the same controller.

The support frame may be a foldable support frame or a telescopic support frame, as long as the optical film 21, the rollable substrate 22, and the flexible carrier 23 can be controlled to be unfolded to be in a flat state, which is not limited in the embodiment of the present application.

In another laser projection apparatus provided in the embodiment of the present application, as shown in fig. 1-2, the laser projection apparatus includes a fixing base 3, where the fixing base 3 includes a plurality of receiving spaces, and can be used for receiving the projection screen 2, such as having the function of the receiving base 243 in the foregoing embodiment, and can also be used for receiving the optical engine 1. When the projection apparatus is not in use, the projection screen 2 is received in the holder. When the projection screen 2 is unfolded when the projection apparatus is in a use state, the optical engine 1 projects a light beam onto the projection screen 2 to display an image. When the projection screen 2 is in the unfolded state, the optical engine 1 and the projection screen 2 have a fixed preset distance to maintain a predetermined projection ratio.

In the embodiment of the application, the optical film is bonded on the rollable substrate, and the rollable substrate can support the optical film to be in a flat state, so that the optical film is not easy to wrinkle and deform. Further, since the rollable substrate can be adhered to the flexible carrier, and the stretching mechanism can tighten the flexible carrier based on the first side and the second side of the flexible carrier, the rollable substrate is in a flat stretched state due to the adhesion to said flexible carrier, the optical film is also in a flat state due to the adhesion to the rollable substrate, while the tensioning mechanism indirectly tensions the crimpable substrate through the flexible carrier, the flexible carrier may take up a portion of the tensioning force of the tensioning mechanism, and the difference of the pulling forces applied to different positions of the curled substrate and the optical membrane in the transverse direction is reduced, so that the curled substrate and the optical membrane are not easy to generate the phenomena of corrugation and wrinkle caused by uneven stress, the flatness of the optical film can be further ensured when the projection screen is in a use state, and the display effect of the projection screen is improved.

And, further, the back of the base plate that can curl is provided with a plurality of strengthening ribs to can be so that to screen application of force direction looks vertically horizontal direction, or, projection screen horizontal intensity increase, thereby when the screen was drawn in the upper and lower direction, the horizontal atress of the base plate that can curl was guaranteed unanimous easily in each position, the optics diaphragm is fixed on it, has also guaranteed the planarization of optics diaphragm, has avoided or has alleviateed the phenomenon of V type ripple and fold greatly, also can prolong the life of the screen that can curl.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.