WO2021185076A1

WO2021185076A1 - Projection device

Info

Publication number: WO2021185076A1
Application number: PCT/CN2021/078764
Authority: WO
Inventors: 陈友才; 钟强; 杨长明
Original assignee: 青岛海信激光显示股份有限公司
Priority date: 2020-03-16
Filing date: 2021-03-02
Publication date: 2021-09-23
Also published as: CN113406852A

Abstract

A projection device, comprising an optical engine (1) and a projection screen (2). The projection screen (2) comprises an optical film (21), a rollable substrate (22), and a control mechanism (24); the optical film (21) is adhered on the rollable substrate (22) and used for receiving a light beam emitted by the optical engine (1); a plurality of reinforcing ribs (25) are provided on the side of the rollable substrate (22) distant from the optical film (21); the length direction of each reinforcing rib (25) is parallel to the transverse direction of the rollable substrate (22); the rollable substrate (22) is fixedly connected to the control mechanism (24); the control mechanism (24) can tension to unfold the rollable substrate (22), or roll to put away the rollable substrate (22); when being unfolded, the rollable substrate (22) supports the optical film (21) to be in a flat state; and the reinforcing ribs (25) can increase the strength of the rollable substrate (22), and thus, the optical film (21) is not easily wrinkled and deformed. Therefore, the flatness of the optical film (21) can be guaranteed, thereby improving the display effect of the projection screen.

Description

Projection equipment

Cross-references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office with an application number of 202010182845.2 and an invention title of "Projection Equipment" on March 16, 2020, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of projection technology, and in particular to a projection device.

Background technique

With the continuous development of science and technology, more and more projection equipment is used in people's work and life. Currently, projection equipment mainly includes optical engines and projection screens. Among them, the projection screen includes an optical film, a back plate and a fixed frame. The optical film is bonded to the back plate, and the fixed frame is wrapped around the optical film and the back plate. The optical engine is mainly used to emit the light beam to the optical film, and the optical film is used to receive the light beam emitted by the optical engine to realize the display of the picture.

However, the area of the backplane is relatively large. During processing, the large-size backplane is prone to deformation such as bulging, which in turn causes the surface of the optical film adhered to the backplane to be uneven, thereby affecting the display effect of the projection screen. In addition, the backplane will greatly increase the weight of the projection screen, is not convenient for transportation and suspension, and will occupy a large space.

Summary of the invention

This application provides a projection device, and the technical solution is as follows:

A projection device, including:

Optical engine, used to emit light beam;

Projection screen, including optical film, rollable substrate and control mechanism;

The optical film is attached to the rollable substrate, and the optical film is used to receive the light beam emitted by the optical engine to display the projection image; the side of the rollable substrate away from the optical film is provided with multiple reinforcing ribs, each of which strengthens The length direction of the rib is parallel to the transverse direction of the rollable substrate;

The rollable substrate is fixedly connected with the control mechanism, and the control mechanism can be tightened to unfold the rollable substrate or curled to retract the rollable substrate. When the rollable substrate is unfolded, the optical film is supported in a flat state.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

FIG. 1 is a schematic structural diagram of a projection device provided by an embodiment of the present application;

2 is a schematic diagram of a front view structure of a projection screen provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a rear view structure of a projection screen provided by an embodiment of the present application;

4 is a schematic structural diagram of a rollable substrate provided by an embodiment of the present application;

FIG. 5 is a schematic front view structure diagram of another projection screen provided by an embodiment of the present application;

Fig. 6 is a schematic structural diagram of another projection device provided by an embodiment of the present application.

Reference signs:

1: optical engine; 2: projection screen; 3: base, 31: first accommodating part; 32: second accommodating part;

21: optical diaphragm; 22: rollable substrate; 23: flexible carrier; 24: control mechanism; 25: stiffener;

241: crimping assembly; 242: lifting assembly; 243: fixed support.

Detailed ways

In order to make the purpose, technical solutions, and advantages of the present application clearer, the implementation manners of the present application will be described in further detail below in conjunction with the accompanying drawings.

FIG. 1 illustrates a schematic structural diagram of a projection device according to an embodiment of the present application, FIG. 2 illustrates a schematic front view structure of a projection screen according to an embodiment of the present application, and FIG. 3 illustrates a schematic diagram of a projection screen according to an embodiment of the present application. Schematic diagram of rear view structure. FIG. 4 illustrates a schematic structural diagram of a rollable substrate provided by an application embodiment.

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the projection equipment includes: an optical engine 1 and a projection screen 2. The optical engine 1 is used to emit light beams; the projection screen 2 includes an optical film 21, a rollable substrate 22 and a control panel. Mechanism 24; the optical film 21 is bonded to the rollable substrate 22, the optical film 21 is used to receive the light beam emitted by the optical engine 1 to display the projection screen; the rollable substrate 22 is provided on the side away from the optical film 21 A plurality of reinforcing ribs 25 are added, and the length direction of each reinforcing rib 25 is parallel to the transverse direction of the rollable substrate 22; the rollable substrate 22 is fixedly connected to the control mechanism 24, and the control mechanism 24 can be tightened to unfold the rollable substrate 22, or The rollable substrate 22 is crimped to retract the rollable substrate 22, and the optical film 21 is in a flat state when the rollable substrate 22 is unfolded.

In the embodiment of the present application, the side of the rollable substrate 22 away from the optical film 21 is provided with a plurality of stiffeners 25, and the length direction of each stiffener 25 is parallel to the transverse direction of the rollable substrate 22, so a plurality of On the one hand, the reinforcing ribs 25 can enhance the strength of the rollable substrate 22, facilitate the curling of the rollable substrate 22, and when the rollable substrate 22 is in a flat state, make the rollable substrate 22 uniformly stressed in the transverse direction, and it is not prone to ripples. And folds. Since the optical film 21 is adhered to the rollable substrate 22, the optical film 21 is not prone to wrinkles and deformation, so that the display effect of the projection screen 2 can be improved. Since the control mechanism 24 can be rolled to retract the rollable substrate 22, the space occupied by the projection screen 2 can be further reduced.

Among them, the optical engine 1 may be an ultra-short-focus optical engine. 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 optomechanical system, a lens, a DMD (Digital Micromirror Device, digital micromirror array) chip, a control circuit board, an audio processing system, a sound system, a heat dissipation system, and a radiator. The light source and lens are all connected to the optomechanical system Fixed connection, the DMD chip is arranged in the optical-mechanical system, the DMD chip, the audio processing system and the heat dissipation system are respectively electrically connected to the control circuit board, the audio processing system is also electrically connected to the audio, and the heat dissipation system is also electrically connected to the radiator.

In this way, the light beam emitted by the light source reaches the DMD chip in the optomechanical system, and the control circuit board modulates the light beam emitted to the DMD chip by controlling the DMD chip, and carries the image output by the control circuit board through the modulated light beam The information is emitted to the lens, and then the light beam is emitted to the optical film 21 included in the projection screen 2 through the lens for display. In addition, the control circuit board controls the audio processing system to process the audio information output by the control circuit board, and sends the processed audio information through the speaker. When the image information is displayed and the audio information is externally released, the control circuit board can control the heat dissipation system to drive the radiator to dissipate heat, so as to avoid high temperature from affecting the functions of each device.

The longitudinal direction of the rollable substrate 22 is a direction parallel to the vertical direction on the rollable substrate 22, and the lateral direction of the rollable substrate 22 is a direction parallel to the horizontal direction on the rollable substrate 22. The optical film 21 may be a thin film, a Fresnel optical film, a black grid screen, a white plastic screen, and the like. When the optical film 21 is a film, the material of the optical film 21 may be PET (Polyethylene Terephthalate, polyethylene terephthalate). PET has strong corrosion resistance, high tensile strength and tear strength, excellent high temperature resistance, abrasion resistance and dimensional stability, so it can ensure that the optical film 21 has a long life. 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, its material may be synthetic resin, which is not limited in the embodiment of the present application.

Among them, the rollable substrate 22 can be set as a thin plate with a relatively thin thickness, which can facilitate curling, and can reduce the thickness of the projection screen 2 to make the projection screen 2 more beautiful. The material of the rollable substrate 22 can be metal, PP (Polypropylene), PC (Polycarbonate), PI (Polyimide, polyimide), etc., and can also be PET or PVC. In a specific implementation, the thickness of the rollable substrate ranges from 0.75 mm to 1.2 mm, and the rollable substrate must also meet the flatness requirements when unfolded, for example, to achieve a flatness requirement of 2‰. The embodiment of the application does not limit this.

The hardness of the rollable substrate 22 can be set to a hardness that is easy to roll. For example, the hardness of the rollable substrate 22 can be between 60-70 Rockwell hardness. This can facilitate the curling and tensioning of the rollable substrate 22 at any time. To drive the curling and tightening of the optical film 21.

It should be noted that the rollable substrate 22 can be manufactured by die rolling, extrusion, etc., of course, it can also be manufactured by other methods, which is not limited in the embodiments of the present application.

It should also be noted that the surface on the side of the rollable substrate 22 close to the optical film 21 may be a flat surface to ensure the flatness of the optical film 21 adhered to the rollable substrate 22. The surface on the side of the rollable substrate 22 far 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.

Among them, the optical film 21 and the rollable substrate 22 can be bonded by double-sided tape or adhesive film, etc., of course, can also be closely connected by other means, which is not limited in the embodiment of the present application.

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

Wherein, each reinforcing rib 25 may have a strip-shaped structure, of course, it may also have a structure of other shapes, which is not limited in the embodiment of the present application. The material of the reinforcing rib 25 can be metal, PP (Polypropylene, polypropylene), PC (Polycarbonate, polycarbonate), PI (Polyimide, polyimide) and other materials. Of course, it can also be other materials. This is not limited. The reinforcing rib 25 may be a rectangular or trapezoidal elongated reinforcing rib 25, or may be a reinforcing rib 25 of other shapes, which is not limited in the embodiment of the present application.

It should be noted that the material of the reinforcing rib 25 may be the same as or different from the material of the rollable substrate 22. For example, when the material of the reinforcing rib 25 is the same as the material of the rollable substrate 22, the material of the strong rib 25 and the rollable substrate 22 may both be PP. When the material of the reinforcing rib 25 is different from the material of the rollable substrate 22, the material of the rollable substrate 22 may be PP, and the materials of the plurality of reinforcing ribs 25 may be metal materials. The rollable substrate 22 of PP material is relative to the metal material. The rollable substrate 22 is more convenient to bend, and the metal reinforcing rib 25 is stronger than the PP material reinforcing rib 25. In this way, the rollable substrate 22 provided with the reinforcing rib 25 is not only easy to bend, but also stronger.

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

In some embodiments, as shown in FIG. 4, each reinforcing rib 25 is parallel to each other along the length direction and parallel to the lateral direction of the rollable substrate 22. In this way, when the rollable substrate 22 is in a flat state, each of the ribs 25 that are parallel to each other can make the force of the rollable substrate 22 in various positions along the transverse and longitudinal directions more uniform, and it is not easy to cause V due to uneven force. The phenomenon of corrugation and wrinkles, thereby enhancing the flatness and stability of the curlable substrate 22. Further, the length direction of each reinforcing rib 25 is parallel to the transverse direction of the curlable substrate 22, so that the force of the curlable substrate 22 in the transverse direction is more uniform, so that the reinforcing rib 25 can further improve the flatness and flatness of the curlable substrate 22. stability.

In some embodiments, a plurality of reinforcing ribs 25 are protrudingly formed on the rollable substrate 22. For example, the reinforcing rib 25 may be fixed on the rollable base plate 22 by screws. Of course, the plurality of reinforcing ribs 25 can also be fixed on the crimpable substrate 22 by means of riveting, ultrasonic welding, hot melting, gluing, etc., which is not limited in the embodiment of the present application.

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

In some embodiments, the plurality of reinforcing ribs 25 may be connected by at least two flexible hinges. Among them, the flexible hinge may be a chain structure formed by hinged multiple short sections, so that the mechanical strength is high, it is easy to bend, and has high flexibility, so the reinforcing rib 25 connected to the flexible hinge is not easy to fall off.

In some embodiments, each flexible hinge may penetrate through multiple reinforcing ribs 25 in a direction perpendicular to the thickness of the reinforcing rib 25, and at least two flexible hinges are parallel or cross each other. In this way, the flexible hinge can more effectively fix the plurality of reinforcing ribs 25, and can make the force of the plurality of reinforcing ribs 25 more uniform.

It should be noted that when multiple reinforcing ribs 25 are connected by at least two flexible hinges, the distance between two adjacent reinforcing ribs 25 can be reduced according to the actual crimping situation. For example, two adjacent reinforcing ribs 25 The spacing between the reinforcing ribs 25 can be set to be between 1.5 mm and 3 mm, for example, it can be 2 mm or 3 mm. In this way, a plurality of reinforcing ribs 25 and at least two flexible hinges can be combined into a curlable curtain-shaped reinforcing plate, and the distance between two adjacent reinforcing ribs 25 is small, so the surface of the curtain-shaped reinforcing plate is relatively flat. In the embodiment, the rollable substrate 22 can be removed, and the optical film 21 can be directly bonded to the curtain-shaped reinforcing plate, so that the thickness of the projection screen 2 can be reduced. That is, the projection screen 2 may only include the optical film 21, a curtain-shaped reinforcing plate composed of a plurality of reinforcing ribs 25 and at least two flexible hinges, and a control mechanism 24.

It should also be noted that rounded corners can be provided at all side edges of the reinforcing rib 25 to adapt to the change of the angle between two adjacent reinforcing ribs 25, thereby enhancing the flexibility of the curtain-shaped reinforcing plate when curling.

In some embodiments, as shown in FIG. 4, the length of each reinforcing rib 25 is equal to the length of the lateral side of the rollable substrate 22 in the transverse direction. In this way, each reinforcing rib 25 can more fully strengthen the rollable substrate 22.

Of course, the length of each reinforcing rib 25 can also be adjusted in a small range according to the actual situation, which is not limited in the embodiment of the present application. For example, a plurality of reinforcing ribs 25 may also be arranged in a square array of reinforcing ribs 25 in multiple rows and multiple columns, and the length direction of each reinforcing rib 25 may be parallel to the transverse direction of the rollable substrate 22, so that they are located on the same strip along the horizontal direction. The sum of the lengths of the multiple stiffeners 25 in the transverse direction of the curled substrate 22 may be equal to the length of the lateral sides of the curlable substrate 22 in the transverse direction, of course, may also be slightly smaller than the lateral sides of the curlable substrate 22 in the transverse direction. The length of is not limited in the embodiment of this application.

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 rollable substrate 22 from directly contacting the optical film 21 on the side away from the optical film 21 when the rollable substrate 22 is in a curled state, so that the surface of the rollable substrate 22 can be prevented from being unsmooth. The optical film 21 is scratched, thereby prolonging the service life of the optical film 21. Wherein, the protective coating may be a coating composed of flexible particles, or a colloidal coating, which is not limited in the embodiments of the present application. The protective coating can be made of nano materials. Nano materials have good toughness, impact resistance and thermal stability. After the protective coating contacts the optical film 21, it can also improve the flatness and wind resistance of the optical film 21. Performance and stability, and can extend the life of the optical film 21.

In some embodiments, as shown in FIG. 3, the control mechanism 24 may include a crimping component 241, a lifting component 242, and a fixed support 243; the crimping component 241 is fixed on the fixed support 243, and the first side edge of the substrate 22 can be curled. Fixedly connected with the crimping assembly 241, the crimping assembly 241 can control the optical film 21 and the crimpable substrate 22 to be crimped on the crimping assembly 241; the first end of the lifting assembly 242 is fixedly connected with the fixed support 243, and the second end of the lifting assembly 242 Fixedly connected to the second side of the rollable substrate 22 corresponding to the first side, the lifting assembly 242 can control the rollable substrate 22 to expand.

Wherein, the fixing support 243 can be fixedly connected with the installation surface to realize the fixing of the projection screen 2. The installation surface may be a support surface of a fixed bracket or a wall surface of a wall, as long as the projection screen 2 can be fixedly supported.

In some embodiments, the crimping assembly 241 may include a crimping controller, a crimping motor, and a reel. The crimping controller is electrically connected to the crimping motor. The crimping motor can be fixed on the fixed support 243. The output shaft of the crimping motor and the reel The ends are fixedly connected, and the first side edge of the rollable substrate 22 is fixedly connected to the reel. Among them, the crimping controller can control the start and stop of the crimping motor, which can drive the reel to rotate after the crimping motor is started. In this way, when the roll controller controls the rotation of the roll, the optical film 21 and the rollable substrate 22 can be controlled to roll on the roll.

Wherein, the curling controller can control the curling motor to rotate forward or backward when receiving a control signal sent by a remote controller that is communicatively connected with it. Of course, the curling controller may also be electrically connected with a control button, and at this time, a control signal may be sent to the curling controller through the control button to control the curling motor to rotate forward or backward. The curling controller may include a single-chip microcomputer and a signal receiver. The single-chip microcomputer is electrically connected to the signal receiver and the curling motor. In this way, after the signal receiver receives the control signal, the signal receiver sends the control signal to the single-chip microcomputer, and the single-chip microcomputer is based on the control signal. Control the forward or reverse rotation of the curling motor.

Wherein, the end of the winding motor and the winding drum can be relatively restricted in the circumferential direction, so that the winding drum can rotate synchronously with the winding motor. In addition, the reel can be moved in the axial direction relative to the crimping motor, so that the reel can be detachable.

When realizing the connection between the crimping motor and the reel, in some embodiments, the inner wall of the reel may be provided with a wedge groove along the axial direction, and the motor shaft of the crimping motor may be provided with a wedge, and the wedge can be arranged along the circumference of the reel. The direction is clamped in the wedge groove, so that the motor shaft of the crimping motor and the reel can be fixed in the circumferential direction, and the reel and the motor shaft of the crimping motor can realize synchronous rotation.

Wherein, the cross section of the wedge groove provided on the inner wall of the reel can be rectangular or trapezoidal, etc., of course, can also be other shapes, as long as the torque transmission of the crimping motor can be realized, which is not limited in the embodiment of the present application.

Wherein, the number of wedge grooves provided on the inner wall of the reel can be one or more. When the number of wedge grooves is more than one, the multiple wedge grooves can be distributed along the circumferential direction of the reel. The specific number of wedge grooves is set according to the torque transmitted by the crimping motor, as long as it can ensure that the torque of the crimping motor is transmitted to the reel and the reel has a certain service life, which is not limited in the embodiment of the application. .

It should be noted that the curling motor may be a stepping motor, so that the curling controller can conveniently control the curling motor. For example, the curling controller can control the forward rotation and reverse rotation of the stepping motor by sending a control signal to the stepping motor, thereby driving the reel to rotate forward and reverse.

Of course, the crimping motor can also be other motors, such as a DC geared motor, etc., as long as it can be easily controlled by the crimping controller, which is not limited in the embodiment of the present application.

In other embodiments, the crimping motor may include a motor body and a roller, the motor body is electrically connected to the crimping controller, the motor shaft of the motor body is fixedly connected to the roller, and the circumferential surface of the roller is provided with grooves along the axial direction. The inner wall is provided with a boss that matches the groove, and the boss can be restricted in the groove.

In this way, the roller fixed on the motor shaft of the motor body is stuffed into the inner cavity of the reel so that the groove on the roller matches the boss of the inner cavity of the reel, and the torque on the motor shaft of the motor body is transmitted through the roller To the reel, it is possible to realize the synchronous rotation of the reel and the motor shaft of the motor body, thereby realizing the synchronous rotation of the reel and the crimping motor.

Wherein, the cross section of the boss provided on the inner wall of the reel can be rectangular or trapezoidal, of course, can also be other shapes, as long as the torque transmission to the crimping motor can be realized, which is not limited in the embodiment of the present application.

Wherein, the number of bosses provided on the inner wall of the reel may be one or more. When the number of bosses is more than one, the plural bosses can be disposed along the circumferential direction of the reel. The specific number of bosses is set according to the torque transmitted by the motor body, as long as the torque of the motor body can be transmitted to the reel, and the reel has a certain service life, the embodiment of the application does not limit this .

It should be noted that the motor body may be a stepper motor, so that the control of the curling motor by the curling controller can be facilitated. Of course, the motor body may also be other motors, as long as it can be easily controlled by the crimping controller, which is not limited in the embodiment of the present application.

It should also be noted that, in addition to the above two embodiments that can realize the synchronous rotation of the motor shaft of the crimping motor and the reel, other structures can also be used to realize the synchronous rotation of the motor shaft of the crimping motor and the reel. This is not limited.

When realizing the fixation of the rollable substrate 22 and the roll, in some embodiments, the outer wall of the roll may be provided with a card slot along the axial direction, and the first side of the rollable substrate 22 may be provided with a card that matches the card slot. The clip strip can be limited in the slot along the radial direction of the reel, so that the first side edge of the rollable substrate 22 can be limited in the circumferential direction of the reel.

In this way, when the reel is rotating, the first side edge of the rollable substrate 22 can be curled synchronously with the roll by the restriction of the clip strip, so that the rollable substrate 22 can be crimped on the roll. And due to the limitation of the clip strip, the roll can provide a certain pulling force to the first side of the rollable substrate 22, and the pulling force can cooperate with the second side of the rollable substrate 22 when it is unfolded, so that The rollable substrate 22 is flatter, thereby improving the display effect of the optical film 21 disposed on the rollable substrate 22.

Among them, the cross section of the card slot and the cross section of the card strip can both have an inverted T-shaped structure. In this way, when the card slot is fixedly connected to the card strip, the card strip can be directly inserted into the card slot along the length of the card slot to pass the card. The slot limits the position of the clip strip to realize the fixed connection between the clip strip and the slot, so that the first side edge of the curlable substrate 22 can be fastened to the reel easily and quickly.

It should be noted that the cross-section of the card slot and the cross-section of the card strip can be both inverted T-shaped, and can also be square. Of course, they can also have other shapes, as long as the card slot can realize the alignment of the card strip along the reel. The limit in the circumferential direction is sufficient, which is not limited in the embodiment of the present application.

Among them, the depth of the card slot and the height of the card strip can be equal. In this way, when the roll rotation drives the rollable substrate 22 to curl, the rollable substrate 22 can be close to the roll, thereby avoiding the rollable substrate 22 from being caught by the clamp strips when the height of the clamp strip is greater than or less than the depth of the groove. The phenomenon of shearing force at the edge of the card slot.

It should be noted that, in addition to the restriction of the first side edge of the rollable substrate 22 in the circumferential direction of the roll by the cooperation of the card slot and the clip strip, the outer wall of the roll and the rollable substrate 22 can also be restricted. The adhesion of the first side edge realizes the limitation of the first side edge of the rollable substrate 22 in the circumferential direction of the roll. Of course, it can also be realized in other ways to limit the first side edge of the rollable substrate 22 along the circumferential direction of the roll. The limit of this is not repeated in the embodiment of this application.

In some embodiments, the lifting assembly 242 may include a lifting controller, a lifting motor, a support frame, and a long rigid frame. The lifting controller is electrically connected to the lifting motor, and the first ends of the lifting motor and the support frame are respectively fixed on the fixed support. On 243, the second end of the support frame is connected to the long rigid frame. The length direction of the long rigid frame may be consistent with the length direction of the second side of the rollable substrate 22, and the length of the long rigid frame may be equal to the length of the second side of the rollable substrate 22. In this way, the long rigid frame can be fixedly connected to the second side of the rollable substrate 22, and the long rigid frame can limit the rollable substrate 22 along the length direction, thereby ensuring the flatness of the rollable substrate 22. The lifting controller can control the start and stop of the lifting motor, the lifting motor can adjust the distance between the second end of the support frame and the crimping assembly 241, and the support frame can control the optical film based on the connection between the long rigid frame and the rollable substrate 22 The sheet 21 and the rollable substrate 22 are unfolded in a flat state.

In this way, after the lifting controller controls the lifting motor to start, the lifting motor can drive the second end of the support frame to rise, thereby driving the second side of the curlable substrate 22 to rise. At this time, the curling assembly 241 can control the reverse of the curlable substrate 22. The rollable substrate 22 is expanded while rotating. In addition, when the lifting motor drives the second end of the support frame to descend, the second side of the rollable substrate 22 can be driven to fall. At this time, the rollable substrate 22 can be rotated forward while the rollable substrate 22 is controlled by the curling assembly 241. 22's put away.

Wherein, the lifting controller can control the forward or reverse rotation of the lifting motor to control the rising or falling of the support frame when receiving the control signal sent by the remote controller that is communicatively connected with it. Of course, the lifting controller may also be electrically connected with a control button. At this time, a control signal can be sent to the lifting controller through the control button to control the raising or lowering of the support frame through the forward or reverse rotation of the lifting motor.

Among them, the lifting controller may include a single-chip microcomputer and a signal receiver. The single-chip microcomputer is electrically connected to the signal receiver and the lifting motor. In this way, after the signal receiver receives the control signal, the signal receiver sends the control signal to the single-chip microcomputer. The control signal controls the forward or reverse rotation of the lifting motor.

It should be noted that when the structure of the crimping assembly 241 is as described above, the lifting controller and the crimping controller may be the same controller. In this way, when the projection device is started, after the same controller receives the start signal sent by the remote controller that is in communication with it, it can control the curling motor and the lifting motor to start at the same time based on the start signal. At this time, the curling motor drives the reel. Synchronous reversal, the lifting motor drives the second end of the support frame to rise, so as to realize the co-expansion of the rollable substrate 22 and the optical film 21. When the projection device is turned off, after the same controller receives the shutdown signal sent by the remote controller that is in communication with it, it can control the curling motor and the lifting motor to start at the same time based on the shutdown signal. At this time, the curling motor drives the reel to be synchronized. The lifting motor drives the second end of the support frame to descend, so as to realize the common curling of the curlable substrate 22 and the optical film 21.

It should also be noted that when the rollable substrate 22 and the optical film 21 are jointly deployed, the height of the second side of the rollable substrate 22 to be raised can be pre-designed, and the curling motor and the optical film 21 can be controlled in advance according to the height. The operating time of the lifting motor, that is, when the same controller receives the start signal, it can automatically control the second side of the rollable substrate 22 to rise to the required height within the operating time, so as to realize the rollable substrate 22 and the optical film 21 are fully unfolded; or when the closing signal is received, the second side of the rollable substrate 22 is automatically controlled to be curled on the roll during the running time, so as to realize the rollable substrate 22 and the optical film 21's are completely retracted. Of course, the same controller can also be manually controlled to realize the complete expansion or fold of the rollable substrate 22 and the optical film 21.

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

In some embodiments, as shown in FIG. 5, the projection screen 2 may further include a flexible carrier 23; the side of the rollable substrate 22 away from the optical film 21 is adhered to the flexible carrier 23, and the first opposite side of the flexible carrier 23 The side and the second side are both fixedly connected to the control mechanism 24, and the control mechanism 24 can be stretched based on the first side and the second side of the flexible carrier 23 to unfold the flexible carrier 23, or curl to retract the flexible carrier 23 When the flexible carrier 23 is unfolded, it supports the rollable substrate 22 in a flat state.

In this way, while the control mechanism 24 indirectly tensions the rollable substrate 22 through the flexible carrier 23, the flexible carrier 23 can bear part of the tensioning force of the control mechanism 24, so that the roll substrate and the optical film 21 are not easily damaged, thereby further ensuring the optical Flatness of diaphragm 21.

The connection relationship between the flexible carrier 23 and the curling assembly 241 and the lifting assembly 242 included in the control mechanism 24 is the same as or similar to the connection relationship between the curlable substrate 22 and the curling assembly 241 and the lifting assembly 242 in the above-mentioned embodiment. This will not be repeated here.

Among them, the flexible carrier 23 may be a synthetic cloth, film, or other carrier that is convenient for curling and has 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 nylon material has high mechanical strength, good toughness, and high tensile and compressive strength, the flexible carrier 23 is not easily deformed when it is tightened by the control mechanism 24, and the surface is flat, which can improve the rollable substrate 22 and optical Flatness of diaphragm 21. Of course, the material of the flexible carrier 23 may also be other materials, which is not limited in the embodiment of the present application.

Among them, the rollable substrate 22 and the flexible carrier 23 can be bonded by double-sided tape or adhesive film, etc., of course, they can also be bonded by other methods, which are not limited in the embodiment of the present application. A side of the rollable substrate 22 close to the first side of the flexible carrier 23 can be fixedly connected to the control mechanism 24 by screws. Of course, the rollable substrate may not be directly connected to the control mechanism 24, which is not limited in comparison with the embodiments of the present application.

It should be noted that when the control mechanism 24 includes the crimping assembly 241, a side of the crimpable substrate 22 close to the first side of the flexible carrier 23 can be fixedly connected to the crimping assembly 241 by screws. In this way, the rollable substrate 22 can share part of the tension received by the flexible carrier 23, so that the flexible carrier 23 is not easily deformed, and the stability of the flexible carrier 23 is ensured, thereby enhancing the stability of the rollable substrate 22 and making the flexible carrier 23 more stable. The curled substrate 22 is not easy to shake.

In some embodiments, as shown in FIG. 6, the projection device may include a base 3 for accommodating the optical engine 1 (built-in, only the appearance structure of the optical engine is shown in FIG. 6) and the projection screen 2 in a rolled state, When the projection screen 2 is in the unfolded state, the optical engine 1 and the projection screen 2 have a fixed preset distance. In this way, when the projection device is not used, the optical engine 1 and the projection screen 2 can be stored in the base 3, which is convenient for saving space. When the projection device is in use, the projection screen 2 can be unfolded, and the optical engine 1 can project a light beam onto the projection screen 2 so that the projection screen 2 can display an image. In addition, the base 3 can maintain a fixed preset distance between the optical engine 1 and the projection screen 2, thereby maintaining a preset projection ratio.

It should be noted that when the projection screen 2 includes an optical film 21, a rollable substrate 22 and a control mechanism 24, the optical film 21, the rollable substrate 22 and the control mechanism 24 can all be accommodated in the base 3, and the optical film 21. The rollable substrate 22 and the control mechanism 24 can also be deployed at the same time. When the projection screen 2 includes other structures, the other structures can also be stored in the base 3 and can also be unfolded at the same time. Further, when the control mechanism 24 includes the lifting assembly 242 and the curling assembly 241, the lifting assembly 242 and the curling assembly 241 can also be stored in the base 3, and the lifting assembly 242 can extend out of the base 3 and expand.

In some embodiments, the base 3 may include a first accommodating portion 31 and a second accommodating portion 32, the optical engine 1 is disposed in an inner cavity of the first accommodating portion 31, and the first accommodating portion 31 is provided with a light-transmitting area , The light beam emitted by the optical engine 1 can pass through the light-transmitting area. The control mechanism 24 may be disposed in the inner cavity of the second accommodating portion 32, and the control mechanism 24 can control the optical film 21 and the rollable substrate 22 to be retracted to the second accommodating portion 32. The second accommodating portion 32 is provided with an opening, and the control mechanism 24 can control the optical film 21 and the rollable substrate 22 to extend out of the opening and expand. When the control mechanism 24 includes a lifting assembly 242, the lifting assembly 242 can extend out of the opening and Unfold. After the optical film 21 is unfolded, it can receive the light beam that passes through the light-transmitting area.

In some embodiments, the base 3 may have a T-shaped structure, and the volume of the first accommodating part is smaller than the volume of the second accommodating part.

Among them, the first accommodating portion 31 and the second accommodating portion 32 may be detachably connected, of course, the first accommodating portion 31 and the second accommodating portion 32 may also be non-detachable connection, that is, The first accommodating portion 31 and the second accommodating portion 32 may be integrally connected.

It should be noted that when the first accommodating part and the second accommodating part are detachably connected, if the optical engine 1 fails, the first accommodating part can be disassembled, and then the optical engine 1 can be installed. The first accommodating part is sent for maintenance as a whole. If the crimping assembly 241 included in the projection screen 2 fails, the second accommodating part can be disassembled, and the second accommodating part provided with the crimping assembly 241 can be sent for maintenance as a whole , So as to avoid sending the entire projection equipment for repair.

In some embodiments, the first accommodating portion and the second accommodating portion can also be connected by a telescopic rod, and the telescopic rod can extend and contract along its own axial direction, that is, as the telescopic rod expands and contracts, the first container can be adjusted. The vertical distance between the center point of the light-transmitting area on the accommodating part and the opening on the second accommodating part, and then adjust the projection distance between the center point of the light beam emitted by the optical engine 1 and the plane on which the projection screen 2 is unfolded to adjust The light beam emitted by the optical engine 1 displays the size of the projection screen of the display area on the projection screen 2. In addition, since 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, the projection device can be adapted to different sizes while ensuring the size of the displayed projection screen. Throw ratio of the optical engine 1.

In the embodiment of the present application, the side of the rollable substrate away from the optical film is provided with a plurality of stiffeners, and the length direction of each stiffener is parallel to the transverse direction of the rollable substrate, so the plurality of stiffeners can strengthen the The strength of the curled substrate facilitates the curling of the curlable substrate, and when the curlable substrate is in a flat state, the curlable substrate is uniformly stressed in the transverse direction, and it is not prone to corrugations and wrinkles. Since the optical film is attached to the rollable substrate, the optical film is not prone to wrinkles and deformation, and the display effect of the projection screen can be improved. Since the control mechanism can be rolled to retract the rollable substrate, the space occupied by the projection screen can be further reduced. When the projection screen includes a flexible carrier, since the rollable substrate can be adhered to the flexible carrier, and the control mechanism can tighten the flexible carrier based on the first side and the second side of the flexible carrier, the control mechanism is indirectly through the flexible carrier. While tightening the curlable substrate, the flexible carrier can bear part of the tightening force of the control mechanism, so that the curling substrate and the optical film are not easily damaged. In this way, the flatness of the optical film can be further ensured, thereby improving the display effect of the projection screen. In addition, the base can accommodate the optical engine and the projection screen, which can reduce the space occupation when the projection device is not in use.

The above are only illustrative examples of this application and are not intended to limit this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection of this application. Within range.

Claims

A projection device, characterized in that, the projection device includes:

An optical engine, which is used to emit light beams;

A projection screen, the projection screen comprising an optical film, a rollable substrate and a control mechanism;

The optical film is attached to the rollable substrate, and the optical film is used to receive the light beam emitted by the optical engine to display a projection image;

A plurality of reinforcing ribs are provided on the side of the rollable substrate away from the optical film, and the length direction of each reinforcing rib is parallel to the transverse direction of the rollable substrate;

The rollable substrate is fixedly connected to the control mechanism, and the control mechanism can be tensioned to unfold the rollable substrate, or curled to retract the rollable substrate, and the rollable substrate supports the optical fiber when the rollable substrate is unfolded. The diaphragm is in a flat state.
5. The projection device according to claim 1, wherein the rollable substrate and the plurality of reinforcing ribs are integrally formed.
5. The projection device according to claim 1, wherein the plurality of reinforcing ribs are protrudingly formed on the rollable substrate.
The projection device according to any one of claims 1 to 3, wherein the plurality of reinforcing ribs are connected by at least two flexible hinges.
The projection device according to any one of claims 1 to 3, wherein the hardness of the rollable substrate is between 60-70 Rockwell hardness.
The projection device according to any one of claims 1 to 3, wherein the rollable substrate is made of PC, PVC, PET, PP, and metal materials with a thickness in the range of 0.75 to 1.2 mm.
7. The projection device according to claim 6, wherein the optical film is made of PET or synthetic resin material.
7. The projection device of claim 6, wherein the reinforcing ribs can be metal, PP, PC, PI materials.
The projection device according to any one of claims 1 to 3, wherein the optical film and the rollable substrate are bonded by double-sided tape or an adhesive film.
8. The projection device according to claim 1 or 8, wherein the reinforcing ribs are strip-shaped,

The spacing between every two parallel reinforcing ribs is 1.5～3mm;

The length of each of the reinforcing ribs is less than or equal to the length of the lateral side of the rollable substrate in the transverse direction;

or,

The sum of the lengths of the multiple reinforcing ribs located on the same straight line along the transverse direction of the rollable substrate is less than or equal to the length of the lateral side of the rollable substrate in the transverse direction.
The projection device according to any one of claims 1 to 3, wherein a protective coating is provided on the side of the rollable substrate away from the optical film.
3. The projection device according to any one of claims 1 to 3, wherein the control mechanism comprises a curling component, a lifting component and a fixed support;

The crimping assembly is fixed on the fixed support, the first side of the crimpable substrate is fixedly connected to the crimping assembly, and the crimping assembly can control the optical film and the crimpable substrate to be crimped at On the crimping component;

The first end of the lifting assembly is fixedly connected with the fixed support, the second end of the lifting assembly is fixedly connected with the second side of the rollable base plate corresponding to the first side, and the lifting assembly The unfolding of the rollable substrate can be controlled.
5. The projection device of claim 1, wherein the laser projection device further comprises a base;

The base is used for accommodating the optical engine and the projection screen in a curled state;

When the projection screen is in an unfolded state, the optical engine and the projection screen have a fixed preset distance.