CN112925161B

CN112925161B - Laser projection device

Info

Publication number: CN112925161B
Application number: CN201911235893.7A
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: 2022-11-22
Anticipated expiration: 2039-12-05
Also published as: CN116088257A; CN112925161A

Abstract

The application discloses laser projection equipment belongs to projection technical field. The laser projection apparatus includes: the projection screen comprises a receiving 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 an inner cavity of the first accommodating part, the first accommodating part is provided with a light-transmitting area, the curling mechanism is arranged in an inner cavity of the second accommodating part, the first end of the curtain is connected with the curling mechanism, the curling mechanism can control the curtain to be folded into the second accommodating part, and the second accommodating part is provided with an opening. This application has realized the integrated design of optical engine and curtain through being connected of optical engine and curtain and storage part, has avoided the condition that optical engine and curtain relative position change, has improved the display effect of picture. In addition, the curtain can be collected to the second accommodating part, and the second end of the curtain can penetrate through the opening and be unfolded, so that the problem that the laser projection equipment occupies a large space when not used is avoided.

Description

Laser projection equipment

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 people's work and life. 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, when a laser projection device is used for projection, a projection screen may be fixed on a support, and then an optical engine is placed right in front of the projection screen, so as to ensure that light beams emitted by the optical engine can form a display image in a display area of the projection screen.

However, when the projection screen is fixed to the support, the support needs to be broken and perforated, and the projection screen may continuously occupy a certain space after being fixed. In addition, since the optical engine is independently fixed, it is easily affected by external factors, resulting in deviation of the emitted light beam from the display area on the projection screen.

Disclosure of Invention

The application provides a laser projection device, which can solve the problem that the occupied space of the laser projection device is easily deviated from the emergent light beam of an optical engine. 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 comprising a winding mechanism and a curtain;

the curling mechanism is arranged in the inner cavity of the second accommodating part, the first end of the curtain is connected with the curling mechanism, and the curling mechanism can control the curtain to be retracted into the second accommodating part;

the second holding portion is provided with an opening, the second end of the curtain can penetrate through the opening and be unfolded, and the curtain can receive the light beam penetrating through the light-transmitting area after being unfolded.

In a possible implementation manner, a vertical distance between a central point of the light-transmitting area and a plane where the curtain is laid out is equal to a ratio between a projection ratio of the optical engine and a width of a display area on the curtain, wherein the width of the display area refers to a dimension value of the display area along a length of the opening.

Optionally, the distance between the center point of the light-transmitting area and the two ends of the opening is equal.

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.

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

the winding controller is electrically connected with the winding motor, the winding motor is fixedly connected with the end part of the winding drum, and the first end of the curtain 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, the crimping motor comprises a motor body and a roller;

the motor body is electrically connected with the curling controller, and a motor shaft of the motor body is fixedly connected with the roller;

the roller is characterized in that bosses are axially arranged on the circumferential surface of the roller, grooves matched with the bosses are formed in the inner wall of the winding drum, and the bosses can be limited in the grooves.

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 reel is provided with the draw-in groove along the axial, the first end of curtain be provided with the card strip that the draw-in groove matches, the card strip can be followed the radial spacing of reel is in the draw-in groove.

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 optical engine is an ultra-short focus optical engine.

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, and the first end of the curtain is fixedly connected with the curling mechanism, so that the integrated design of the optical engine and the curtain is realized, and the change of the relative position between the optical engine and the curtain is avoided. Because the curling mechanism can control the curtain to be packed up to the second holding part, and the second end of the curtain can pass through the opening and be expanded, the packing up or the expansion of the curtain can be realized, and the problem that the laser projection equipment occupies a large space when not in use is avoided. 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.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other 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 schematic view of a laser projection apparatus provided in an embodiment of the present application;

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.

Reference numerals:

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

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

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

3121: a motor body; 3122: a roller; 3131: a boss; 3132: a card slot; 31221: and (4) 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: the projection screen 3 includes a winding mechanism 31 and a curtain 32. 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 winding mechanism 31 is disposed in the inner cavity of the second accommodating portion 12, a first end of the curtain 32 is connected to the winding mechanism 31, the winding mechanism 31 can control the curtain 32 to be wound into the second accommodating portion 12, the second accommodating portion 12 is provided with an opening 121, a second end of the curtain 32 can pass through the opening 121 and be unwound, and the curtain 32 can receive the light beam passing through the light-transmitting area 111 after being unwound.

In the embodiment of the present disclosure, 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, and the first end of the curtain 32 is fixedly connected to the curling mechanism 31, so that the optical engine 2 and the curtain 32 are integrally designed, and the change of the relative position between the optical engine 2 and the curtain 32 is avoided. Since the winding mechanism 31 can control the curtain 32 to be retracted into the second accommodating portion 12, and the second end of the curtain 32 can pass through the opening 121 and be extended, the curtain 32 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 32 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 32, thereby displaying the picture.

In the actual implementation process, the winding mechanism 31 drives the first end of the curtain 32 to rotate forward along the circumferential direction of the winding mechanism 31, so that the curtain 32 is wound on the winding mechanism 31 along the first end, and the curtain 32 is folded. The winding mechanism 31 drives the first end of the curtain 32 to rotate reversely along the circumferential direction of the winding mechanism 31, and the second end of the curtain 32 can pass through the opening 121 and be unfolded. 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 2, and of course, the optical engine 2 may also be a short-focus optical engine 2 or a long-focus optical engine 2.

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 respectively electrically connected to the control circuit board, the audio processing system is further electrically connected to the sound Device, and the heat dissipation system is further electrically connected to the heat sink.

Thus, the light beam emitted from the light source is emitted to the DMD chip in the optical-mechanical system, the control circuit board modulates the light beam emitted to the DMD chip by controlling the DMD chip, and emits the modulated light beam to the lens carrying the image information output by the control circuit board, and further emits the light beam to the screen 32 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 32 is unfolded is equal to the ratio between the projection ratio of the optical engine 2 and the width of the display area on the curtain 32, which is the dimension of the display area along the length of the opening 121.

The length of the display area on the curtain 32 along the length direction of the opening 121 may be less than or equal to the width of the curtain 32. 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 32 is the length of the side of the curtain 32 in the same direction as the length direction 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 32 is laid out is different.

In this way, in the actual installation process, the vertical distance between the center point of the light-transmitting area 111 and the plane where the screen 32 is located when being unfolded can be calculated through the projection ratio of the optical engine 2 and the width of the display area, and the vertical distance is determined as the vertical distance between the center point of the light-transmitting area 111 and the center line of the opening 121 in the length direction, so that the light beam emitted by the optical engine 2 can be completely projected on the display area of the screen 32.

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 formed by the light beam emitted from the optical engine 2 can be positioned in the center area of the display area on the screen 32.

It should be noted that, in order to make the formed projection exactly coincide with the display area when the curtain 32 is disposed, so as to improve the display effect, the middle point of one side of the curtain 32 in the width direction of the display area coincides with the middle point of the opening 121 in the length direction, and the display area is located in the central area of the curtain 32.

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 entirely sent for maintenance, 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 entirely sent for maintenance, so as to avoid sending the entire laser projection apparatus for maintenance.

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 retracting along an axial direction thereof, that is, along with the extension and retraction 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 32 is located when the curtain 32 is unfolded, so as to adjust a size of a display screen of the light beam emitted from the optical engine 2 on the curtain 32. In addition, since the vertical distance between the center point of the light transmission region 111 of the first accommodating portion 11 and the opening 121 of the second accommodating portion 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 32 may include a cloth body and an optical film, a first end of the cloth body is fixedly connected to the curling mechanism 31, a second end of the cloth body can extend out of the second accommodating portion 12 along the opening 121 and be unfolded, and the optical film is fixed on the cloth body to form a display area on the cloth body, that is, the optical film on the cloth body is the display area.

Thus, the cloth body can be folded by connecting the cloth body with the curling mechanism 31, and the second end of the cloth body can extend out of the opening 121 and be unfolded, so that the optical film can be driven to be synchronously folded or unfolded.

Wherein, the length or width of the optical film can be smaller than that of the cloth body, so as to support the whole area of the optical film through the cloth body. In addition, when the length of the optical film is smaller than the length of the cloth body, the optical film can be fixed on the side of the curtain 32 near the second end, so that the optical film can be completely exposed out of the second accommodating portion 12 when the curtain 32 is unfolded.

In other embodiments, the curtain 32 may include a rollable substrate and a sub-curtain, wherein a first end of the rollable substrate is fixedly connected to the rolling mechanism 31, a second end of the rollable substrate can extend out of the second accommodating portion 12 along the opening 121 and be unfolded, and the sub-curtain is laminated and bonded to a first side of the rollable substrate. In this way, the rollable substrate can be folded by connecting the rollable substrate with the rolling mechanism 31, and the second end of the rollable substrate can penetrate through the opening 121 and be unfolded, so that the rollable substrate can be unfolded, the sub-curtain can be laminated and bonded on the rollable substrate, and the sub-curtain can be driven to be synchronously folded or unfolded.

The sub-curtain can comprise a soft cloth and an optical film, so that the first side face of the soft cloth and the back of the optical film can be laminated and bonded, and the second side face of the soft cloth and the first side face of the rollable substrate can be laminated and bonded, so that the optical film can be protected by the soft cloth, and the rollable substrate can be prevented from damaging the optical film. Of course, the sub-curtain may also include only the optical film, and the optical film is directly laminated and bonded on the rollable substrate, as long as the display of the picture can be realized through the sub-curtain, which is not limited in the embodiment of the present application.

The rollable substrate can be of a rolling door structure, so that the rollable substrate can be conveniently rolled, and meanwhile, when the rollable substrate is unfolded, the flatness of the sub-curtain can be guaranteed through the supporting effect of the rollable substrate.

In some embodiments, the number of the rollable substrates in the roll-up door shape may be two, and the length of each rollable substrate may be greater than or equal to the length of the sub-curtain, and the sum of the widths of the two rollable substrates may be less than the width of the sub-curtain. Like this, can fix the both sides at the sub-curtain along length direction respectively with two curly base plates that are rolling slats door structure to the support of the both sides of sub-curtain can be realized, thereby can prevent that the both sides of sub-curtain from taking place to curl and the fold under the effect of the pulling force of curling mechanism 31 and supporting mechanism, with the display effect who improves the sub-curtain.

The length of the sub-curtain is the length of the side of the sub-curtain in the same direction as the second end of the sub-curtain, and the width of the sub-curtain is the length of the side of the sub-curtain in the direction perpendicular to the second end of the sub-curtain.

Wherein, two curly base plates that are rolling slats door structure all can be fixed in the front of sub-curtain, and two curly base plates also all can be fixed in the back of sub-curtain certainly, and this application embodiment does not do the restriction to this. When the two rollable substrates are fixed on the front surface of the sub-curtain, no overlapping part exists between the display area on the sub-curtain and the fixing area of the two rollable substrates.

In other embodiments, the number of the rollable substrates in the shape of a rolling door may also be one, and the length of the rollable substrate may be greater than the length of the sub-curtain, and the width of the rollable substrate may be greater than or equal to the width of the sub-curtain. Like this, can laminate the back of sub-curtain and bond the first side at the base plate that can curl to but realize the support to the whole area of sub-curtain through the base plate that can curl, thereby can avoid the mid portion of sub-curtain to take place to curl and fold and reduce the display effect of sub-curtain under the effect of the pulling force of the first end of sub-curtain and second end. The back of the sub-curtain is a side of the sub-curtain far from the optical engine 2 when the sub-curtain is unfolded.

Of course, the rollable substrate may have a smooth planar configuration when unrolled, in addition to a rolled configuration. The size of the rollable substrate in the smooth plane shape when being unfolded may be the same as or similar to the size of the rollable substrate in the roll door shape described above, which is not limited in the embodiment of the present application.

The rollable substrate which is smooth and planar when unfolded can be made of synthetic cloth, and the synthetic cloth can be directly laminated and bonded with the optical film. Of course, the rollable substrate in the flat shape that is smooth when being unfolded may be made of other materials, such as a steel sheet, and the like, which is not limited in this embodiment of the present application.

Wherein the hardness of the rollable substrate in the unfolded smooth planar shape may be between 60-70 rockwell hardness. Thus, when the curling mechanism 31 does not curl the curlable substrate, the curlable substrate can pass through the opening 121 and be unfolded under the action of the tension of the curlable substrate, so that the sub-curtain can be unfolded; the winding mechanism 31 can also be convenient to wind along the circumferential direction of the winding mechanism, so that the sub-curtain fixed on the base plate capable of winding can be driven to wind synchronously, and the sub-curtain can be folded.

The flatness of the rollable substrate in the flat shape which is smooth 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 can be 0.5/10000.

In some embodiments, the second side of the rollable substrate may be provided with a protective coating, so that when the rollable substrate is driven by the rolling mechanism 31 to roll, the protective coating can prevent the light receiving surface of the sub-curtain from directly contacting the rollable substrate, thereby preventing the rollable substrate from scratching the light receiving surface of the sub-curtain, and improving the service life of the sub-curtain.

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 the curtain 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 curtain 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 curtain 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.

Wherein, the end parts 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, thereby enabling the coiling drum 313 to rotate synchronously along with the coiling motor 312 and realizing the disassembly of the coiling motor 312 and the coiling drum 313.

In some embodiments, as further shown in fig. 3, 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 shaft 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 accommodating part 12.

Thus, when the winding motor 312 drives the winding drum 313 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 as to avoid the end of the winding drum 313 connected with the inner wall shaft of the second accommodating part 12 from shaking, and prevent the end of the winding drum 313 connected with the inner wall shaft of the second accommodating part 12 from bending 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 crimping 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 curtain 32 pack up at the uniform velocity, with the stability that improves projection screen 3.

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 tightly clamped 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 circumferentially fixed, 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 the wedge grooves is set according to the torque transmitted by the winding motor 312, as long as the torque of the winding 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 embodiment of the present invention.

It should be noted that the curling motor 312 can be a stepping motor, so that the control of the curling motor 312 by the curling controller 311 can be facilitated. For example, curl controller 311 may control the forward and reverse rotation of the stepper motor by sending a control signal to the stepper motor to drive the spool 313 forward and reverse.

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. 3, 4 and 5, the curling motor 312 includes a motor body 3121 and a roller 3122, the motor body 3121 is electrically connected to the curling controller 311, a motor shaft of the motor body 3121 is fixedly connected to the roller 3122, a groove 31221 is axially formed on a circumferential surface of the roller 3122, a boss 3131 matched with the groove 31221 is formed 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 on 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, so that the synchronous rotation of the winding drum 313 and the motor shaft of the motor body 3121, and further the synchronous rotation of the winding drum 313 and the winding motor 312 can be realized.

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 to the winding motor 312 is achieved, which is not limited in the embodiments of the present invention.

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, as long as it is ensured that the torque of the motor body is transmitted to the winding drum 313, and the winding drum 313 has a certain service life, which is not limited in the embodiment of the present application.

It should be noted that the motor body 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 may be another motor as long as it can be easily controlled by the curl controller 311, and this embodiment of the present application is not limited thereto.

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, as shown in fig. 4, the outer wall of the winding drum 313 may be provided with a clamping groove 3132 along the axial direction, and the first end of the curtain 32 may be provided with a clamping strip (not shown) matching with the clamping groove 3132, and the clamping strip 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 curtain 32 along 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 curtain 32 and the winding drum 313 can be synchronously curled through the limit of the clamping strip, so that the curtain 32 can be curled on the winding drum 313. And because the position of the clamping strip 321 is limited, the winding drum 313 can provide a certain pulling force to the first end of the curtain 32, and the pulling force can be matched with the second end of the curtain 32 under the action of unfolding, so that the curtain 32 is smoother, and the display effect of the curtain 32 is improved.

Wherein, the cross-section of draw-in groove 3132 and the cross-section of card strip can all be the structure of falling T shape, like this, when draw-in groove 3132 and card strip fixed connection, can directly insert the card strip in draw-in groove 3132 along the length direction of draw-in groove 3132 to carry on spacingly to the card strip through draw-in groove 3132, realize the fixed connection of card strip and draw-in groove 3132, thereby can convenient and fast fix the first end of curtain 32 on reel 313.

It should be noted that, the cross section of the slot 3132 and the cross section of the card strip may be both in an inverted T shape, or in a square shape, or in other shapes, as long as the slot 3132 can limit the card strip 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 strip. Thus, when the winding drum 313 rotates to roll the curtain 32, the curtain 32 can be tightly attached to the winding drum 313, thereby preventing the curtain 32 from being subjected to the shearing force of the edge of the card strip or the card slot 3132 when the height of the card strip 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 curtain 32 along the circumferential direction of the winding drum 313 through the matching of the clamping groove 3132 and the clamping strip, the limitation of the first end of the curtain 32 along the circumferential direction of the winding drum 313 can be realized through the adhesion of the outer wall of the winding drum 313 and the first end of the curtain 32, and of course, the limitation of the second end of the curtain 32 along the circumferential direction of the winding drum 313 can also be realized through other manners, which is not described in detail in this embodiment of the application.

In the embodiment of the present application, besides the curtain 32 can pass through the opening 121 and be unfolded under the tension of itself, the projection screen 3 can further include a lifting mechanism, so that the curtain 32 can pass through the opening 121 and be unfolded under the supporting action of the lifting mechanism.

In some embodiments, the lifting mechanism may include a lifting controller, a lifting motor, and a supporting frame, the lifting controller is electrically connected to the lifting motor, a first end of the supporting frame is fixedly connected to the second accommodating portion 12, and a second end of the supporting frame is fixedly connected to the second end of the curtain 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 curtain 32 to rise, and at this time, the winding mechanism 31 can control the curtain 32 to rotate reversely, and meanwhile, the curtain 32 can be unfolded. In addition, when the lifting motor drives the second end of the support frame to descend, the second end of the curtain 32 can be driven to descend, and at the moment, the winding mechanism 31 can control the curtain 32 to rotate in the forward direction and meanwhile the curtain 32 can be folded.

The first end of the supporting frame may be fixed on the outer wall of the second accommodating portion 12, and certainly, the first end of the supporting frame may also pass through the opening 121 and be fixed in the inner cavity of the second accommodating portion 12. 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 curtain 32 is curled, so as to ensure that the curtain 32 can be completely accommodated in the second accommodating portion 12, thereby protecting the curtain 32.

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 apparatus is started, after the same controller receives a start 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 start simultaneously based on the start signal, at this time, the winding motor 312 drives the winding drum 313 to rotate reversely synchronously, and the lifting motor drives the second end of the support frame to rise, so as to realize the unfolding of the curtain 32. When the laser projection device is turned off, after the same controller receives a turn-off signal sent by a remote controller in communication connection with the same controller, the 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 curtain 32 is wound.

It should be noted that, when the screen is unfolded, the height to be raised at the second end of the curtain 32 may be pre-designed, and then the operation duration of the winding motor 312 and the lifting motor is pre-controlled according to the height, that is, when the same controller receives the start signal, the second end of the curtain 32 may be automatically controlled to be raised to the required height within the operation duration, so as to completely unfold the curtain 32; or automatically controls the rolling of the curtain 32 onto the roll 313 for the run length upon receipt of the close signal to achieve full retraction of the curtain 32. Of course, the same controller can be controlled manually to achieve full deployment or retraction of the curtain 32.

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 curtain 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.

Thus, 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 part 12, and then the rolling mechanism 31 drives the first end of the curtain 32 to rotate while the curtain 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 curtain 32 is curled, so as to reduce the space occupied by the laser projection device.

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 to curtain 32.

In some embodiments, a slide rail is disposed on the fixing rod, the first lifting assembly includes a first support rod and a second slider, a first end of the first support rod is connected to the cross rod, a second end of the first support 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 to adjust an included angle between the first support rod and the fixing rod.

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 slide block moves 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, and thus adjust the height of the curtain 32. 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 to the outer wall of the second lifting rod, the second end of the first push-pull rod is hinged to the first sliding block, the first sliding block is slidably arranged on the sliding rail and 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, and this 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.

Like this, when the motor shaft corotation of motor body or reversal, the motor shaft of motor body drives the synchronous corotation of lead screw or reversal, and the lead screw drives first slider and moves or reverse movement along the slide rail positive direction then to realize the control that motor body moved along the slide rail to first slider.

Wherein, the lead screw can set up in the recess 31221 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, be convenient for install.

Wherein, the motor body can be step motor, like this, can be convenient for lift controller to lift motor's control. 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 screw stepping motor, and a motor shaft of the 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.

The self-lubricating gasket can be a polyformaldehyde resin gasket. Certainly, the self-lubricating gasket also can be other gaskets, as long as can play the lubrication action to first slider and slide rail can, this application embodiment does not do the restriction to this.

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

In the embodiment of the application, the optical engine is disposed in the inner cavity of the first accommodating portion, the curling mechanism is disposed in the inner cavity of the second accommodating portion, and the first end of the curtain is fixedly connected with the curling mechanism, so that the optical engine and the curtain are integrally designed, and the change of the relative position between the optical engine and the curtain is avoided. Because the curling mechanism can control the curtain to be packed up to the second holding part, and the second end of the curtain can pass through the opening and be expanded, the packing up or the expansion of the curtain can be realized, and the problem that the laser projection equipment occupies a large space when not in use is avoided. 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, according to the embodiment of the application, the vertical distance between the optical engine and the plane where the curtain is located is determined through the transmittance of the optical engine and the width of the display area on the curtain, so that the light beams emitted by the optical engine can be completely projected on the display area, and the display effect is improved.

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:

a housing portion configured from a first housing portion and a second housing portion;

a projection screen comprising a winding mechanism and a curtain;

the second accommodating part is provided with an opening, a second end of the curtain can penetrate through the opening and can be unfolded, and the curtain can receive the light beam penetrating through the light-transmitting area after being unfolded;

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 adjustable;

the first accommodating part is detachably connected with the second accommodating part, and the first accommodating part is connected with the second accommodating part through a telescopic rod;

the accommodating part is of a T-shaped structure, and the volume of the first accommodating part is smaller than that of the second accommodating part.

2. The laser projection device of claim 1, wherein a vertical distance between a center point of the light-transmissive region and a plane on which the curtain is laid out is equal to a ratio between a throw ratio of the optical engine and a width of a display area on the curtain, the width of the display area being a dimension of the display area along a length of the opening.

3. The laser projection device of claim 2, wherein a distance between a center point of the light transmissive region to both ends of the opening is equal.

4. The laser projection device of claim 1, wherein the crimping mechanism comprises: a curl controller, a curl motor and a reel;

5. The laser projection device of claim 4, wherein the curl motor includes a motor body and a roller;

the roller is characterized in that a groove is axially formed in the circumferential surface of the roller, a boss matched with the groove is arranged on the inner wall of the winding drum, and the boss can be limited in the groove.

6. The laser projection device as claimed in claim 4, 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.

7. The laser projection device as claimed in claim 4, wherein the outer wall of the winding drum is provided with a clamping groove along the axial direction, the first end of the curtain 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.

8. The laser projection device of claim 7, wherein a cross-section of the card slot and a cross-section of the card bar each have an inverted T-shaped configuration.

9. The laser projection device of claim 1, wherein the optical engine is an ultra-short focus optical engine.