CN112925160B

CN112925160B - Laser projection device

Info

Publication number: CN112925160B
Application number: CN201911235821.2A
Authority: CN
Inventors: 钟强; 杨长明; 陈友才
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2023-01-10
Anticipated expiration: 2039-12-05
Also published as: CN112925160A; CN116107149A

Abstract

The application discloses laser projection equipment belongs to projection technical field. The laser projection apparatus includes: the device comprises a containing part, an optical engine and a projection screen. The accommodating part is provided with a first accommodating part and a second accommodating part, the optical engine is arranged in the inner cavity of the first accommodating part, and the first accommodating part is provided with a light transmitting area. The projection screen comprises a curling mechanism, a curlable substrate and a curtain, wherein the curling mechanism is arranged in an inner cavity of the second accommodating part, the first end of the curlable substrate is fixedly connected with the curling mechanism, the curtain is laminated and bonded on the first side surface of the curlable substrate, the second accommodating part is provided with an opening, and the second end of the curlable substrate can penetrate through the opening and expand. Curling mechanism can control the base plate that can curl in this application and pack up to the second holding portion, has realized packing up of curtain, and the second end of the base plate that can curl can pass the opening and expand, has realized the expansion of curtain, supports the curtain through the base plate that can curl to the roughness after the curtain expandes has been guaranteed.

Description

Laser projection device

Technical Field

The application relates to the technical field of projection, in particular to laser projection equipment.

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. The laser projection equipment mainly comprises an optical engine and a projection screen, wherein the optical engine is mainly used for emitting light beams to the projection screen, and the projection screen is used for reflecting the light beams emitted by the optical engine so as to realize the display of pictures in a display area on the projection screen. The display area on the projection screen refers to an area where the optical film is disposed.

In the related art, the projection screen comprises a curling mechanism and a curtain, wherein the curling mechanism is fixed on a wall body, one end of the curtain is fixedly connected with the curling mechanism, and the curling mechanism can rotate to flatten or curl the curtain. When the curtain is used for realizing projection, the curling mechanism can be rotated forwards to flatten the curtain; when the curtain is not used, the curling mechanism can be rotated reversely to curl the curtain.

However, after the curtain is curled for a long time, the curtain is easily wrinkled or curled and contracted, and a picture projected on the curtain is deformed, thereby affecting a display effect on the curtain.

Disclosure of Invention

The application provides a laser projection equipment, can solve among the laser projection equipment the curtain that projection screen includes and produce the problem of fold. The technical scheme is as follows:

a laser projection device, the laser projection device comprising:

a receiving portion having a first receiving portion and a second receiving portion;

the optical engine is arranged in the inner cavity of the first accommodating part, the first accommodating part is provided with a light transmitting area, and light beams emitted by the optical engine can penetrate through the light transmitting area;

a projection screen, the projection screen comprising: a curling mechanism, a curlable substrate and a curtain;

the curling mechanism is arranged in the inner cavity of the second accommodating part, the first end of the curlable substrate is fixedly connected with the curling mechanism, the curtain is adhered to the first side surface of the curlable substrate in a laminating way, and the curling mechanism can control the curlable substrate to be retracted into the second accommodating part;

the second accommodating part is provided with an opening, the second end of the rollable substrate can penetrate through the opening and be unfolded, and after the rollable substrate is unfolded, the curtain can receive the light beams penetrating through the light transmitting area.

In one possible implementation, the rollable base plate is in a roller door configuration.

Alternatively, the rollable substrate can assume a smooth planar configuration under the influence of an external force.

Optionally, the hardness of the rollable substrate is between 60-70 rockwell hardness.

Optionally, the second side of the rollable substrate is provided with a protective coating.

Optionally, the crimping mechanism comprises: a curl controller, a curl motor, and a spool;

the curling controller is electrically connected with the curling motor, the curling motor is fixedly connected with the end part of the winding drum, and the first end of the curlable substrate is fixedly connected with the winding drum;

the curling controller can control the start and stop of the curling motor, and the curling motor can drive the winding drum to rotate.

Optionally, a wedge groove is axially formed in the inner wall of the winding drum, a wedge block is arranged on a motor shaft of the crimping motor, and the wedge block can be limited in the wedge groove along the circumferential direction of the winding drum.

Optionally, the outer wall of the winding drum is provided with a clamping groove along the axial direction, the first end of the base plate capable of being curled is provided with a clamping strip matched with the clamping groove, and the clamping strip can be limited in the clamping groove along the radial direction of the winding drum.

Optionally, the cross section of the clamping groove and the cross section of the clamping strip are both in an inverted T-shaped structure.

Optionally, the receiving portion is a T-shaped structure, and a volume of the first receiving portion is smaller than a volume of the second receiving portion.

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

the optical engine is arranged in the inner cavity of the first accommodating part, the curling mechanism is arranged in the inner cavity of the second accommodating part, the first end of the curlable substrate is fixedly connected with the curling mechanism, the curtain is laminated and bonded with the first side surface of the curlable substrate, the integrated design of the optical engine and the curtain is realized, the change of the relative position between the optical engine and the curtain is avoided, and the flatness of the curtain after being unfolded is ensured through the support of the curlable substrate on the curtain. The curling mechanism can control the curlable substrate to be retracted to the second accommodating part, and the second end of the curlable substrate can penetrate through the opening and be unfolded, so that the curling substrate can be retracted or unfolded, the curtain can be retracted or unfolded, and the problem that the laser projection equipment occupies a large space when not in use is solved. After the screen is unfolded, the light beams emitted by the optical engine can pass through the light-transmitting area arranged in the first accommodating part and be projected on the screen, so that the display of the picture is realized.

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 is a schematic structural diagram of a laser projection apparatus provided in an embodiment of the present application;

FIG. 2 is an exploded view of a laser projection apparatus according to an embodiment of the present disclosure;

FIG. 3 is a schematic cross-sectional view of a crimping mechanism according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a spool according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a roller according to an embodiment of the present disclosure;

fig. 6 is a schematic cross-sectional view of a winding drum according to an embodiment of the present disclosure.

Description of the drawings:

1: a storage section; 2: an optical engine; 3: a projection screen;

11: a first receptacle portion; 12: a second receptacle portion; 31: a crimping mechanism; 32: a rollable substrate; 33: a curtain;

111: a light-transmitting region; 121: an opening; 311: a curl controller; 312: a crimping motor; 313: a reel; 321: clamping the strip;

3121: a motor body; 3122: a roller; 3131: a boss; 3132: a card slot; 31221: and (6) a groove.

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 illustrates a schematic structural diagram of a laser projection apparatus according to an embodiment of the present application, and fig. 2 illustrates an exploded schematic structural diagram of a laser projection apparatus according to an embodiment of the present application. As shown in fig. 1 and 2, the laser projection apparatus includes: receiving portion 1, optical engine 2 and projection screen 3, projection screen includes: a curling mechanism 31, a rollable substrate 32, and a curtain 33. The receiving portion 1 has a first receiving portion 11 and a second receiving portion 12, the optical engine 2 is disposed in an inner cavity of the first receiving portion 11, the first receiving portion 11 is provided with a light-transmitting area 111, and the light beam emitted from the optical engine 2 can pass through the light-transmitting area 111. The curling mechanism 31 is disposed in the inner cavity of the second accommodating portion 12, the first end of the rollable substrate 32 is fixedly connected with the curling mechanism 31, the curtain 33 is laminated and bonded on the first side surface of the rollable substrate 32, the curling mechanism 31 can control the rollable substrate 32 to be retracted into the second accommodating portion 12, the second accommodating portion 12 is provided with an opening 121, the second end of the rollable substrate 32 can pass through the opening 121 and be unfolded, and after the rollable substrate 32 is unfolded, the curtain 33 can receive the light beam transmitted through the light-transmitting area 111.

In the embodiment of the present application, the optical engine 2 is disposed in the inner cavity of the first accommodating portion 11, the curling mechanism 31 is disposed in the inner cavity of the second accommodating portion 12, the first end of the rollable substrate 32 is fixedly connected to the curling mechanism 31, and the curtain 33 is laminated and bonded to the first side of the rollable substrate 32, so that the optical engine 2 and the curtain 33 are integrally designed, the change of the relative position between the optical engine 2 and the curtain 33 is avoided, and the support of the rollable substrate 32 to the curtain 33 ensures the flatness of the curtain 33 after being unfolded. Since the curling mechanism 31 can control the rollable substrate 32 to be retracted into the second accommodating portion 12, and the second end of the rollable substrate 32 can pass through the opening 121 and be extended, the rollable substrate 32 can be retracted or extended, the curtain 33 can be retracted or extended, and the problem of large space occupied by the laser projection apparatus when not in use is avoided. After the curtain 33 is unfolded, the light beam emitted from the optical engine 2 can pass through the light-transmitting area 111 disposed in the first accommodating portion 11 and be projected on the curtain 33, thereby displaying the picture.

In the actual implementation process, the curling mechanism 31 can drive the first end of the curlable substrate 32 to rotate forward along the circumferential direction of the curling mechanism 31, so that the curlable substrate 32 is curled on the curling mechanism 31 along the first end, the curling substrate 32 is retracted, and the curtain 33 is retracted. In addition, the curling mechanism 31 can drive the first end of the curlable substrate 32 to rotate reversely along the circumferential direction of the curling mechanism 31, and at this time, the second end of the curlable substrate 32 can pass through the opening 121 and be unfolded, so as to realize the unfolding of the curtain 33. Here, the clockwise direction may be determined as a forward direction, and the counterclockwise direction may be determined as a reverse direction.

The optical engine 2 may be an ultra-short focus optical engine, and of course, the optical engine 2 may also be a short focus optical engine or a long focus optical engine.

In some embodiments, the optical engine 2 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 by carrying the image information output by the control circuit board, and then emits the light beam to the curtain 33 included in the projection screen 3 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.

In some embodiments, the vertical distance between the center point of the light-transmitting region 111 and the plane where the curtain 33 is unfolded is equal to the ratio between the projection ratio of the optical engine 2 and the width of the display region on the curtain 33, where the width of the display region refers to the dimension of the display region along the length of the opening 121.

The length of the display area on the curtain 33 along the length direction of the opening 121 may be less than or equal to the width of the curtain 33. The central point of the light-transmitting area 111 may refer to a central point of the light beam emitted from the optical engine 2, that is, the light outlet of the optical engine 2 is located in a central area of the light-transmitting area 111. The width of the curtain 33 is the length of the side of the curtain 33 that is in the same direction as the length of the opening 121.

Since the throw ratio is a performance parameter of the optical engine 2, the throw ratio of the optical engine 2 is related to the selected optical engine 2, that is, the throw ratio is different when different optical engines 2 are selected, and thus the vertical distance between the central point of the light-transmitting region 111 and the plane where the curtain 33 is laid out is different.

In this way, in the actual installation process, the vertical distance between the center point of the light-transmitting region 111 and the plane where the screen 33 is laid out can be calculated from the projection ratio of the optical engine 2 and the width of the display region, and the vertical distance is determined as the vertical distance between the center point of the light-transmitting region 111 and the center line of the opening 121 in the length direction, so that the light beam emitted by the optical engine 2 can be projected on the display region of the screen 33 completely.

Further, the distance from the center point of the light-transmitting region 111 to both ends of the opening 121 may be equal. In this way, the projection of the light beam emitted from the optical engine 2 can be positioned in the center area of the display area on the screen 33.

In order to make the formed projection exactly coincide with the display area when the curtain 33 is disposed, so as to improve the display effect, the midpoint of one side of the curtain 33 in the width direction of the display area coincides with the midpoint of the opening 121 in the length direction, and the display area is located in the central area of the curtain 33.

In some embodiments, as shown in fig. 2, the receiving portion 1 may have a T-shaped structure, and the volume of the first receiving portion 11 is smaller than the volume of the second receiving portion 12.

The first accommodating portion 11 and the second accommodating portion 12 may be detachably connected, and the first accommodating portion 11 and the second accommodating portion 12 may also be non-detachably connected, that is, the first accommodating portion 11 and the second accommodating portion 12 may be integrally connected.

It should be noted that, when the first accommodating portion 11 and the second accommodating portion 12 are detachably connected, if the optical engine 2 fails, the first accommodating portion 11 may be detached, and the first accommodating portion 11 provided with the optical engine 2 may be sent to be maintained as a whole, and if the curling mechanism 31 included in the projection screen 3 fails, the second accommodating portion 12 may be detached, and the second accommodating portion 12 provided with the curling mechanism 31 may be sent to be maintained as a whole, so as to avoid sending the whole laser projection apparatus to be maintained.

In some embodiments, the first accommodating portion 11 and the second accommodating portion 12 may be connected by a telescopic rod, and the telescopic rod may be capable of extending and contracting along an axial direction thereof, that is, along with the extension and contraction of the telescopic rod, a vertical distance between a center point of the light-transmitting region 111 on the first accommodating portion 11 and the opening 121 on the second accommodating portion 12 may be adjusted, so as to adjust a projection distance between a center point of the light beam emitted from the optical engine 2 and a plane where the curtain 33 is located when the curtain 33 is unfolded, so as to adjust a size of a display frame of the light beam emitted from the optical engine 2 on the curtain 33. In addition, since the vertical distance between the center point of the light-transmitting region 111 of the first accommodating part 11 and the opening 121 of the second accommodating part 12 is adjustable, the laser projection apparatus can be adapted to optical engines 2 with different projection ratios while ensuring the size of the display screen.

In some embodiments, the curtain 33 may include a soft cloth and the optical film, such that a first side of the soft cloth may be laminated to the back of the optical film and a second side of the soft cloth may be adhered to the first side of the rollable substrate 32, so that the optical film may be protected by the soft cloth to prevent the rollable substrate 32 from damaging the optical film. Of course, the curtain 33 may only include the optical film, and the optical film is directly laminated and bonded on the rollable substrate 32, as long as the screen can be displayed through the curtain 32, which is not limited in the embodiment of the present application.

In some embodiments, as shown in fig. 2, the rollable substrate 32 can be in a roll-up door configuration to facilitate the rolling of the rollable substrate 32, while maintaining the flatness of the curtain 33 by the support of the rollable substrate 32 as the rollable substrate 32 is unrolled.

The number of the rollable substrates 32 in the roll door shape may be two, and the length of each rollable substrate 32 may be greater than or equal to the length of the curtain 33, and the sum of the widths of the two rollable substrates 32 may be less than the width of the curtain 33. Thus, the two rollable substrates 32 in the rolling door structure can be respectively fixed at two sides of the curtain 33 along the length direction to support two sides of the curtain 33, so as to prevent the middle position of the curtain 33 from rolling and wrinkling under the pulling force of the first end and the second end of the curtain 33, thereby improving the display effect of the curtain 33.

The length of the curtain 33 is the length of the side of the curtain 33 in the same direction as the second end of the curtain 33 is stretched, and the width of the curtain 33 is the length of the side of the curtain 33 perpendicular to the direction of stretching the second end of the curtain 33.

In addition, both of the two rollable substrates 32 in the rolling door structure may be fixed on the front surface of the curtain 33, and of course, both of the two rollable substrates 32 may also be fixed on the back surface of the curtain 33, which is not limited in the embodiment of the present application. When the two rollable substrates 32 are fixed to the front surface of the curtain 33, there is no overlapping portion between the display area on the curtain 33 and the fixing area of the two rollable substrates 32.

Of course, as shown in fig. 2, the number of the rollable substrate 32 in the rolling door shape may be one, the length of the rollable substrate 32 may be greater than the length of the curtain 33, and the width of the rollable substrate 32 may be greater than or equal to the width of the curtain 33. Thus, the back of the curtain 33 can be fixed on the first side of the rollable substrate 32, so that the rollable substrate 32 can support the whole area of the curtain 33, and the middle part of the curtain 33 can be prevented from rolling and wrinkling under the pulling force of the first end and the second end of the curtain 33, thereby reducing the display effect of the curtain 33. The back of the curtain 33 is a surface of the curtain 33 far from the optical engine 2 when the curtain is unfolded.

In other embodiments, the rollable substrate 32 can assume a smooth, planar configuration when deployed. The size of the rollable base plate 32 in the flat shape when unfolded may be the same as or similar to the size of one rollable base plate 32 in the rolling door shape described above, which is not limited in the embodiments of the present application.

As shown in fig. 2, the rollable substrate 32, which is in a smooth planar shape when unfolded, may be a synthetic cloth, and the synthetic cloth may be directly laminated and bonded to the optical film. Of course, the rollable substrate 32 in a flat shape that is smooth when being unfolded may be made of other materials, such as a steel sheet, which is not limited in the embodiment of the present invention.

Wherein the stiffness of the rollable substrate 32, which is smooth and planar when unrolled, can be between 60-70 rockwell. In this way, when the curling mechanism 31 does not curl the curlable substrate 32, the curlable substrate 32 can pass through the opening 121 and be unfolded under the tension of the curlable substrate to realize the unfolding of the curtain 33; the winding mechanism 31 can also facilitate winding along the circumferential direction, so as to facilitate the curtain 33 fixed on the rollable substrate 32 to be synchronously rolled, thereby realizing the folding or unfolding of the curtain 33.

The flatness of the rollable substrate 32 in a smooth planar shape when unfolded can be artificially determined based on the projection ratio of the optical engine 2, for example, when the projection ratio of the optical engine 2 is 0.25, the flatness of the rollable substrate 32 can be 0.5/10000.

In some embodiments, the second side of the rollable substrate 32 may be provided with a protective coating, such that when the rollable substrate 32 is rolled by the rolling mechanism 31, the protective coating prevents the light receiving surface of the curtain 33 from directly contacting the rollable substrate 32, thereby preventing the rollable substrate 32 from scratching the light receiving surface of the curtain 33, and improving the lifespan of the curtain 33.

Wherein, protective coating can be the coating of special fluorine dragon coating, also can be the coating of the soft material of bubble cotton class, as long as can realize the isolation protection to curtain 33 can, this application embodiment does not do the restriction to this.

In the embodiment of the present application, as shown in fig. 3, the curling mechanism 31 may include: the curling device comprises a curling controller 311, a curling motor 312 and a winding drum 313, wherein the curling controller 311 is electrically connected with the curling motor 312, the curling motor 312 is fixedly connected with the end part of the winding drum 313, and the first end of the rollable substrate 32 is fixedly connected with the winding drum 313. The curl controller 311 can control the start and stop of the curl motor 312, and the curl motor 312 can drive the winding drum 313 to rotate.

The curling controller 311 can control the curling motor 312 to rotate forward or reversely when receiving a control signal sent by a remote controller connected with the curling controller in a communication way. Of course, the curling controller 311 may also be electrically connected to a control button, and then a control signal may be sent to the curling controller 311 through the control button to control the curling motor 312 to rotate in forward or reverse direction.

The curling controller 311 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 312, and 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 controls the curling motor 312 to rotate forward or backward based on the control signal.

The end portions of the coiling motor 312 and the coiling drum 313 can be limited along the circumferential direction, and the coiling motor 312 and the coiling drum 313 can move along the axial direction, so that the coiling drum 313 can rotate synchronously along with the coiling motor 312, and meanwhile, the coiling motor 32 and the coiling drum 313 can be detached.

In some embodiments, the number of the curling motors 312 may be one, such that the motor shaft of the curling motor 312 may be coupled to an end of the winding drum 313, and an end of the winding drum 313 remote from the curling motor 312 is coupled to an inner wall shaft of the second receptacle 12.

Thus, when the winding drum 313 is driven by the winding motor 312 to rotate synchronously, the end of the winding drum 313 connected with the inner wall shaft of the second accommodating part 12 can provide support for the end of the winding drum 313 far away from the winding motor 312 through the shaft, so that the end of the winding drum 313 connected with the inner wall shaft of the second accommodating part 12 is prevented from shaking, and the end of the winding drum 313 connected with the inner wall shaft of the second accommodating part 12 is prevented from being bent due to gravity.

In other embodiments, the number of the winding motors 312 may be two, and two winding motors 312 are respectively located at two sides of the winding drum 313 and fixedly connected to two ends of the winding drum 313 along the circumferential direction of the winding drum 313.

Like this, can be convenient for drive reel 313 through two curling motor 312 simultaneously and rotate to provide same moment of torsion for reel 313's both ends, thereby can avoid reel 313's both ends to lead to the speed difference because of the moment of torsion is different, and then can make can curl base plate 32 and curtain 33 and pack up at the uniform velocity in the lump, with the stability that improves projection screen.

In some embodiments, a wedge groove (not shown) may be axially formed on an inner wall of the winding drum 313, and a wedge (not shown) may be disposed on a motor shaft of the winding motor 312, and the wedge may be limited in the wedge groove along a circumferential direction of the winding drum 313, so that the motor shaft of the winding motor 312 and the winding drum 313 may be fixed along the circumferential direction, and further, the winding drum 313 and the motor shaft of the winding motor 312 may rotate synchronously.

The cross section of the wedge groove formed in the inner wall of the winding drum 313 may be rectangular, trapezoidal, or the like, and may be of other shapes as long as the torque of the winding motor 312 can be transmitted, which is not limited in the embodiment of the present application.

The number of the wedge grooves provided on the inner wall of the winding drum 313 may be one or more, and when the number of the wedge grooves is more, the plurality of wedge grooves may be provided along the circumferential direction of the winding drum 313. The specific number of wedge grooves is set according to the torque transmitted by the curling motor 312, as long as it can ensure that the torque of the curling motor 312 is transmitted to the winding drum 313, and the winding drum 313 has a certain service life, which is not limited in the embodiments of the present application.

It should be noted that the curling motor 312 may be a stepping motor, so that the control of the curling motor 312 by the curling controller 311 may be facilitated. For example, the curl controller 311 may control the forward rotation and the backward rotation of the stepping motor by sending a control signal to the stepping motor, so as to drive the winding drum 313 to rotate forward and backward.

Of course, the curling motor 312 may be other motors, such as a dc speed reduction motor, as long as it can be controlled by the curling controller 311 conveniently, which is not limited in the embodiments of the present application.

In other embodiments, as shown in fig. 4 and 5, the crimping motor 312 includes a motor body 3121 and a roller 3122, the motor body 3121 is electrically connected to the crimping controller 311, a motor shaft of the motor body 3121 is fixedly connected to the roller 3122, a groove 31221 is axially disposed on a circumferential surface of the roller 3122, a boss 3131 matching with the groove 31221 is disposed on an inner wall of the winding drum 313, and the boss 3131 can be limited in the groove 31221.

In this way, the roller 3122 fixed on the motor shaft of the motor body 3121 is inserted into the inner cavity of the winding drum 313, so that the groove 31221 of the roller 3122 is matched with the boss 3131 of the inner cavity of the winding drum 313, and the torque on the motor shaft of the motor body 3121 is transmitted to the winding drum 313 through the roller 3122, thereby enabling the synchronous rotation of the winding drum 313 and the motor shaft of the motor body 3121, and further enabling the synchronous rotation of the winding drum 313 and the curling motor 312.

The cross section of the boss 3131 disposed on the inner wall of the winding drum 313 may be rectangular or trapezoidal, and may also be other shapes as long as the torque transmission of the winding motor 312 is achieved, which is not limited in the embodiments of the present application.

Here, the number of the bosses 3131 provided on the inner wall of the winding drum 313 may be one or more, and when the number of the bosses 3131 is more, the bosses 3131 may be provided in the circumferential direction of the winding drum 313. The specific number of the bosses 3131 is set according to the torque transmitted by the motor body 3121, as long as it is ensured that the torque of the motor body 3121 is transmitted to the winding drum 313, and the winding drum 313 has a certain service life, which is not limited in the embodiments of the present invention.

It should be noted that the motor body 3121 may be a stepping motor, so as to facilitate the control of the curling motor 312 by the curling controller 311. Of course, the motor body 3121 may be other motors as long as they can be conveniently controlled by the curl controller 311, and this is not limited in this embodiment of the present application.

It should be noted that, in addition to the two embodiments described above, the motor shaft of the winding motor 312 and the winding drum 313 can be synchronously rotated, and the motor shaft of the winding motor 312 and the winding drum 313 can also be synchronously rotated by other structures, which is not limited in the embodiments of the present application.

In some embodiments, the outer wall of the winding drum 313 may be provided with a clamping groove 3132 in the axial direction, the first end of the rollable substrate 32 may be provided with a clamping strip 321 matching with the clamping groove 3132, the clamping strip 321 can be limited in the radial direction of the winding drum 313 within the clamping groove 3132, so that the limitation of the first end of the rollable substrate 32 in the circumferential direction of the winding drum 313 can be achieved.

In this way, when the winding drum 313 rotates, the first end of the rollable substrate 32 and the winding drum 313 can be synchronously curled by the limit of the clamping strip 321, so that the rollable substrate 32 can be curled on the winding drum 313. And because the position of the clamping strip 321 is limited, the reel 313 can provide a certain pulling force to the second end of the rollable substrate 32, and the pulling force can be mutually matched with the second end of the rollable substrate 32 under the action of unfolding, so that the rollable substrate 32 is more flat, the curtain 33 is more flat, and the display effect of the curtain 33 is further improved.

Wherein, as shown in fig. 6, the cross section of the card slot 3132 and the cross section of the card strip 321 may all be an inverted T-shaped structure, so that, when the card strip 321 is fixedly connected with the card slot 3132, the card strip 321 may be directly inserted into the card slot 3132 along the length direction of the card slot 3132, so as to limit the card strip 321 through the card slot 3132, thereby realizing the fixed connection of the card strip 321 and the card slot 3132, and thus, the first end of the rollable substrate 32 may be conveniently and quickly fixed on the winding drum 313.

It should be noted that, the cross section of the slot 3132 and the cross section of the card strip 321 may be both in an inverted T shape, or may be both in a square shape, or of course, they may also be both in other shapes, as long as the slot 3132 can limit the card strip 321 along the circumferential direction of the winding drum 313, which is not limited in the embodiment of the present application.

Wherein, the depth of the card slot 3132 may be equal to the height of the card bar 321. Thus, when the reel 313 rotates to drive the rollable substrate 32 to curl, the rollable substrate 32 can be tightly attached to the reel 313, thereby preventing the rollable substrate 32 from being subjected to a shearing force from the edge of the card strip 321 or the card slot 3132 when the height of the card strip 321 is greater than or less than the depth of the card slot 3132.

It should be noted that, in addition to the limitation of the first end of the rollable substrate 32 along the circumferential direction of the winding drum 313 through the matching of the clamping groove 3132 and the clamping strip 321, the limitation of the first end of the rollable substrate 32 along the circumferential direction of the winding drum 313 may also be realized through the lamination and adhesion of the outer wall of the winding drum 313 and the first end of the rollable substrate 32, and of course, the limitation of the second end of the rollable substrate 32 along the circumferential direction of the winding drum 313 may also be realized through other manners, which is not described in detail in this embodiment of the present application.

In the embodiment of the present application, in addition to the curtain 33 passing through the opening 121 and being unfolded under its own tension, the projection screen 3 may further include a lifting mechanism, so that the curtain can pass through the opening 121 and be unfolded under the supporting action of the lifting mechanism.

In some embodiments, the lifting mechanism 2 may include a lifting controller, a lifting motor, and a support frame, wherein the lifting controller is electrically connected to the lifting motor, a first end of the support frame is fixedly connected to the second accommodating portion 1, and a second end of the support frame is fixedly connected to the second end of the rollable substrate 32. The lifting controller can control the starting and stopping of the lifting motor, and the lifting motor can adjust the distance between the second end of the support frame and the second accommodating part 12.

Thus, after the lifting controller controls the lifting motor to start, the lifting motor can drive the second end of the support frame to rise, and further drive the second end of the rollable substrate 32 to rise, and at the moment, the rollable substrate 32 can be unfolded while the rolling mechanism 31 controls the rollable substrate 32 to rotate reversely, and further the curtain 33 can be unfolded. In addition, when the lifting motor drives the second end of the supporting frame to descend, the second end of the rollable substrate 32 can be driven to descend, and at the moment, the rollable substrate 32 can be retracted while the rolling mechanism 31 controls the rollable substrate 32 to rotate in the forward direction, so that the curtain 33 can be retracted.

The first end of the supporting frame may be fixed on the outer wall of the second accommodating portion 12, and of course, the first end of the supporting frame may also be fixed in the inner cavity of the second accommodating portion 12 through the opening 121. When the first end of the supporting frame is fixed in the inner cavity of the second accommodating portion 12, the second end of the supporting frame can be clamped at the opening 121 when the rollable substrate 32 is rolled, so as to ensure that the rollable substrate 32 can be completely accommodated in the second accommodating portion 12 together with the curtain 33, thereby protecting the rollable substrate 32 and the curtain 33.

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.

When the structure of the curling mechanism 31 is as described above, the raising/lowering controller and the curling controller 311 may be the same controller. Thus, when the laser 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 312 and the lifting motor can be controlled to be started simultaneously based on the starting signal, at this time, the curling motor 312 drives the winding drum 313 to synchronously rotate reversely, and the lifting motor drives the second end of the support frame to ascend, so that the curling substrate 32 is unfolded, and then the curtain 33 is unfolded. When the laser projection apparatus 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 winding motor 312 and the lifting motor can be controlled to be started simultaneously based on the turn-off signal, at this time, the winding motor 312 drives the winding drum 313 to rotate forward synchronously, and the lifting motor drives the second end of the support frame to descend, so that the winding of the rollable substrate 32 is realized, and further, the winding of the curtain 33 is realized.

It should be noted that, when the screen is unfolded, the height at which the second end of the rollable substrate 32 needs to be raised may be designed in advance, and then the operation duration of the rolling motor 312 and the lifting motor is controlled in advance according to the height, that is, when the same controller receives the start signal, the same controller may automatically control the second end of the rollable substrate 32 to be raised to the required height within the operation duration, so as to completely unfold the rollable substrate 32, and further completely unfold the curtain 33; or automatically controlling the rollable substrate 32 to be rolled on the roll 313 during the operation time period when the closing signal is received, so as to realize the complete retraction of the rollable substrate 32 and the curtain 33. Of course, the same controller can be controlled manually to achieve the complete expansion or contraction of the rollable substrate 32 and the curtain 33.

In some embodiments, the supporting frame may include a fixing rod, a cross rod, a first lifting assembly and a second lifting assembly, the fixing rod is fixedly connected to the second accommodating portion 12, the cross rod is fixedly connected to the second end of the rollable substrate 32, the first end of the first lifting assembly and the first end of the second lifting assembly are respectively connected to the cross rod, the second end of the first lifting assembly and the second end of the second lifting assembly are both connected to the fixing rod and a lifting motor, and the lifting motor can adjust the distance between the fixing rod and the cross rod through the first lifting assembly and the second lifting assembly.

In this way, the distance between the fixing rod and the cross rod can be adjusted by controlling the first lifting assembly and the second lifting assembly through the lifting motor, so as to adjust the distance between the cross rod and the second accommodating portion 12, and further, the curling mechanism 31 drives the first end of the curling substrate 32 to rotate, and simultaneously, the curling substrate 32 is folded or unfolded.

The fixing rod may be directly fixed on the outer wall of the second accommodating portion 12, or may be fixed in the inner cavity of the second accommodating portion 12. Thus, when the fixing rod is fixed in the inner cavity of the second accommodating portion 12, the first lifting assembly can drive the cross rod to be completely retracted into the second accommodating portion 12 after the rollable substrate 32 is rolled, so as to reduce the space occupied by the laser projection apparatus.

Further, the first end of the first lifting component and the first end of the second lifting component can be connected to the two ends of the cross rod respectively, and the second end of the first lifting component and the second end of the second lifting component can be connected to the two ends of the fixing rod respectively. Like this, when first lifting unit and second lifting unit go up and down, can make the holding power that the horizontal pole received distribute evenly to promote the levelness and the stability of horizontal pole, and then promote the stability that the horizontal pole supported curly base plate 32 and curtain 33.

In some embodiments, a slide rail is disposed on the fixing rod, the first lifting assembly includes a first supporting rod and a second slider, a first end of the first supporting rod is connected to the cross rod, a second end of the first supporting rod is connected to the second slider, the second slider is slidably disposed on the slide rail and connected to the lifting motor, and the lifting motor can drive the second slider to slide along the slide rail.

Like this, elevator motor can drive the second slider and slide along the slide rail to make the contained angle increase between first bracing piece and the dead lever or reduce, thereby realize the rising or the decline of the first end of first bracing piece, and then realize the rising or the decline of horizontal pole.

The connection between the first end of the first support rod and the cross rod and the connection between the second end of the first support rod and the second slider are both hinged, and of course, other connection manners, such as a shaft pin connection, may also be used, as long as the first end of the first support rod and the cross rod can be rotated, and the second end of the first support rod and the second slider can be rotated, which is not limited in the embodiments of the present application.

Wherein, first lifting unit can also include first stopper, and first stopper is fixed on the slide rail, and first stopper can carry on spacingly to first slider. The edge at the slide rail can be fixed to first stopper of example, like this, when first slider moved to the edge of slide rail along the slide rail, can carry on spacingly to first slider through the first stopper that sets up to prevent that first slider from deviating from on the slide rail.

Further, the first support rod may be electrically connected with a lift controller capable of controlling the first support rod to be elongated or shortened in the length direction. Thus, after the first slider is moved to make the first supporting rod perpendicular to the cross bar, the lifting controller can control the first supporting rod to extend or contract along the length direction, so as to adjust the height of the cross bar, so as to adjust the height of the rollable substrate 32, and further adjust the height of the curtain 33. For example, the first support rod may be a jack or the like as long as the elongation or contraction of itself can be achieved.

In other embodiments, a slide rail may be disposed on the fixed rod, the first lifting assembly may include a first lifting rod, a second lifting rod, a first elastic member, a first push-pull rod, and a first slider, a first end of the first lifting rod and a first end of the second lifting rod are hinged to form a V-shaped structure through the elastic member, a distance between a second end of the first lifting rod and a second end of the second lifting rod is compressible, the second end of the first lifting rod is hinged to the cross rod, and the second end of the second lifting rod is hinged to the fixed rod. The first end of the first push-pull rod is hinged with the outer wall of the second lifting rod, the second end of the first push-pull rod is hinged with the first sliding block, the first sliding block is slidably arranged on the sliding rail and is connected with the lifting motor, and the lifting motor can drive the first sliding block to slide along the sliding rail.

Therefore, the lifting motor can drive the first sliding block to slide along the sliding rail, so that the second end of the first push-pull rod is driven to synchronously move through the first sliding block, the movement of the second end of the first push-pull rod enables the included angle between the first push-pull rod and the sliding rail to be increased or reduced, the first end of the first push-pull rod is further enabled to ascend or descend, the included angle between the second lifting rod and the sliding rail is accordingly increased or reduced, then, along with the increase or reduction of the included angle between the second lifting rod and the sliding rail, the angle of the V-shaped structure at the hinged position of the first end of the second lifting rod and the first end of the first lifting rod is correspondingly increased or reduced, the second end of the first lifting rod is further enabled to ascend or descend, and the first end of the first lifting assembly is enabled to ascend or descend.

Wherein, first elastic component can be torsion spring, and after the first end of first lifter and the first end of second lifter passed through first elastic component and articulated for the V-arrangement structure, torsion spring provided elasticity to make the opening 121 of this V-arrangement structure have open trend, thereby make the second end of first lifter have ascending trend, and then can provide the holding power for the horizontal pole all the time, in order to improve the supporting effect of support frame.

Of course, the first elastic element may be another element as long as the opening 121 of the V-shaped structure has a tendency to open, which is not limited in the embodiment of the present application.

Wherein, the both ends of first elastic component can respectively with the outer wall welding of the outer wall of first bracing piece and second bracing piece, certainly, also can be through the outer wall fixed connection of other modes and first bracing piece and the outer wall of second bracing piece, as long as realize the both ends of elastic component respectively with the outer wall of the first end of first lifter with the fixed connection of the outer wall of the first end of second lifter can, this application embodiment does not limit to this.

In some embodiments, the lifting motor may include a motor body and a screw rod, the screw rod is disposed on the fixing rod, one end of the screw rod is connected to the motor body, the first slider is connected to the screw rod via a thread, and the motor body is capable of driving the screw rod to rotate in a circumferential direction, so as to enable the first slider to slide along the sliding rail in an axial direction of the screw rod.

Therefore, when the motor shaft of the motor body rotates forwards or backwards, the motor shaft of the motor body drives the lead screw to rotate forwards or backwards synchronously, and then the lead screw drives the first sliding block to move forwards or backwards along the sliding rail, so that the first sliding block is controlled to move along the sliding rail by the motor body.

Wherein, the lead screw can set up in the recess of slide rail, and with first slider threaded connection, like this, can realize the threaded connection of first slider and lead screw and the slip of first slider along the slide rail simultaneously to can also save space, the installation of being convenient for.

Wherein, the motor body can be step motor, like this, can be convenient for the lift controller to the control of elevator motor. For example, the lifting controller may control the forward rotation and the reverse rotation of the stepping motor by sending a control signal to the stepping motor, and the stepping motor drives the screw to rotate forward and reverse, so as to switch the sliding direction of the first slider along the sliding rail.

In other embodiments, the lifting motor may be a lead screw stepping motor, and a motor shaft of the lead screw stepping motor is directly in threaded connection with the first slider, so that the first slider can move along the slide rail.

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

Like this, when first slider moved along the slide rail, the self-lubricating gasket can play the lubrication action to first slider and slide rail to make the frictional force between first slider and the slide rail reduce, thereby can make the translation rate of first slider stable, and can reduce elevator motor's load.

Wherein, the self-lubricating gasket can be a polyformaldehyde resin gasket. Certainly, the self-lubricating gasket can also be other gaskets as long as can play the lubricated effect to first slider and slide rail, and this application embodiment does not limit this.

In the embodiment of the present application, the connection manner of the members included in the second lifting assembly may be the same as or similar to the connection manner of the members included in the first lifting assembly described in the first manner, and of course, the connection manner of the members included in the first lifting assembly described in the second manner may also be the same as or similar to the connection manner of the members included in the first lifting assembly described in the second manner, which is not limited in the embodiment of the present application.

In the embodiment of the application, the optical engine is arranged in the inner cavity of the first accommodating part, the curling mechanism is arranged in the inner cavity of the second accommodating part, the first end of the curlable substrate is fixedly connected with the curling mechanism, and the curtain is laminated and bonded with the first side surface of the curlable substrate, so that the integrated design of the optical engine and the curtain is realized, the change of the relative position between the optical engine and the curtain is avoided, and the flatness of the curtain after being unfolded is ensured through the support of the curlable substrate on the curtain. The curling mechanism can control the rollable substrate to be retracted to the second accommodating part, and the second end of the rollable substrate can penetrate through the opening and be unfolded, so that the rollable substrate can be retracted or unfolded, the curtain can be retracted or unfolded, and the problem that the laser projection equipment occupies a large space when not in use is solved. After the curtain is unfolded, the light beam emitted by the optical engine can pass through the light-transmitting area arranged in the first accommodating part and be projected on the curtain, so that the display of the picture is realized. In addition, the embodiment of the application provides the rollable substrate in the shape of the rolling door and the rollable substrate in the shape of the smooth plane, which can be rolled by external force, so that the curtain is supported by the rollable substrate, and wrinkles are prevented from being generated after the curtain is stressed.

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.

Claims

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

the second accommodating part is provided with an opening, the second end of the rollable substrate can pass through the opening and be unfolded, and after the rollable substrate is unfolded, the curtain can receive the light beams penetrating through the light transmitting area;

the first accommodating part and the second accommodating part are connected through a telescopic rod, the telescopic rod extends and retracts along the axial direction of the telescopic rod, and the vertical distance between the center point of the light-transmitting area on the first accommodating part and the opening on the second accommodating part is adjusted through the extension and retraction of the telescopic rod so as to adapt to optical engines with different throw ratios;

the curlable substrate is in a rolling door structure, and a protective coating is arranged on the second side face of the curlable substrate;

the crimping mechanism includes: a curl controller, a curl motor, and a spool;

the curling controller can control the start and stop of the curling motor, and the curling motor can drive the winding drum to rotate;

the outer wall of reel is provided with the draw-in groove along the axial, the first end of base plate that can curl be provided with the card strip that the draw-in groove matches, the card strip can be followed the reel radially be in the draw-in groove, the degree of depth of draw-in groove with the height of card strip equals.

2. The laser projection device of claim 1, wherein the rollable substrate assumes a smooth, planar configuration when unrolled.

3. The laser projection device of claim 2, wherein the hardness of the rollable substrate is between 60-70 rockwell.

4. The laser projection device as claimed in claim 1, wherein the inner wall of the winding drum is provided with a wedge groove along the axial direction, and the motor shaft of the winding motor is provided with a wedge block which can be limited in the wedge groove along the circumferential direction of the winding drum.

5. The laser projection device of claim 1, wherein a cross-section of the card slot and a cross-section of the card bar each have an inverted T-shaped configuration.

6. The laser projection apparatus of claim 1, wherein the receiving portion has a T-shaped structure, and a volume of the first receiving portion is smaller than a volume of the second receiving portion.