Ultra-short-throw laser projection device and method for adjusting placement of host thereof

Abstract

The present application discloses an ultra-short-throw laser projection device and a method for adjusting the placement state of its host, which belongs to the field of projection display. The state parameter acquisition component in the ultra-short-throw laser projection device is used to obtain the current state parameters of the host and send the current state parameters to the control component. The control component in the ultra-short-throw laser projection device is used to provide an adjustment signal to the host drive component if it detects that the current state parameters are different from the initial state parameters. The host drive component in the ultra-short-throw laser projection device is used to adjust the placement state of the host to the placement state indicated by the initial state parameters in response to the adjustment signal. Since the ultra-short-throw laser projection device in the present application can automatically detect the placement state of the host and automatically adjust the placement state of the host when the host is moved, the reliability and efficiency of adjusting the placement state of the host are improved.

Description

Technical Field

[0001] The present disclosure relates to the field of projection display, and in particular to an ultra-short-throw laser projection device and a method for adjusting the placement state of a host thereof. Background Art

[0002] At present, ultra-short-throw laser projection equipment may include a host and a projection screen, wherein the host is used to project images onto the projection screen. For ultra-short-throw laser projection equipment, since the principle of projection imaging causes the light to be emitted obliquely upward, the position between the laser beam emitted by the optical engine in the host and the projection screen must be strictly aligned, and a slight displacement of the host will also cause deformation or distortion of the image.

[0003] At present, when the user accidentally moves the host, due to the different imaging principles, it is impossible for ordinary users to adjust the position of the ultra-short-throw laser projection device in the same way as adjusting the long-throw laser projection device. Therefore, it is difficult to adjust the ultra-short-throw laser projection device. Summary of the invention

[0004] The disclosed embodiment provides an ultra-short-throw laser projection device and a method for adjusting the placement state of a host thereof, which can solve the problem of low efficiency and reliability in adjusting the placement state of the host in the related art.

[0005] The technical solution is as follows:

[0006] In one aspect, an ultra-short-throw laser projection device is provided, the ultra-short-throw laser projection device comprising: a host, a state parameter acquisition component, a projection screen, a host drive component, and a control component;

[0007] The state parameter acquisition component is connected to the control component, and is used to acquire the current state parameters of the host and send the current state parameters to the control component, and the current state parameters are used to indicate the current placement state of the host;

[0008] The control component is also connected to the host driving component, and the control component is used to provide an adjustment signal to the host driving component if it is detected that the current state parameter is different from the initial state parameter, and the initial state parameter is used to indicate the placement state of the host when the picture projected by the optical engine in the host is located within the projection screen and the size of the picture is the initial size;

[0009] The host driving component is connected to the host, and is used to adjust the placement state of the host to the placement state indicated by the initial state parameter in response to the adjustment signal.

[0010] On the other hand, a method for adjusting the placement state of a host is provided, which is applied to a control component in an ultra-short-throw laser projection device, wherein the ultra-short-throw laser projection device further comprises: a host, a state parameter acquisition component, a projection screen and a host drive component, wherein the control component is respectively connected to the state parameter acquisition component and the host drive component, and the host drive component is also connected to the host; the method comprises:

[0011] Receiving a current state parameter sent by the state parameter acquisition component, wherein the current state parameter is used to indicate a current placement state of the host;

[0012] If it is detected that the current state parameter is different from the initial state parameter, an adjustment signal is provided to the host driving component, and the adjustment signal is used to control the host driving component to adjust the placement state of the host to the placement state indicated by the initial state parameter, and the initial state parameter is used to indicate the placement state of the host when the picture projected by the optical engine in the host is located within the projection screen and the size of the picture is the initial size.

[0013] The beneficial effects brought by the technical solution provided by the embodiments of the present disclosure include at least:

[0014] The disclosed embodiment provides an ultra-short-throw laser projection device and a method for adjusting the placement state of its host. When the control component in the ultra-short-throw laser projection device detects that the current state parameter sent by the state parameter acquisition component is different from the initial state parameter, it can determine that the host has been moved. The control component can then send an adjustment signal to the host drive component, and the host drive component can adjust the placement state of the host in response to the adjustment signal. Since the ultra-short-throw laser projection device can automatically detect the placement state of the host and automatically adjust the placement state of the host when the host is moved, the user does not need to manually adjust the placement state of the host in this process, thereby improving the reliability and efficiency of adjusting the placement state of the host. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 is a structural schematic diagram of an ultra-short-throw laser projection device provided by an embodiment of the present disclosure;

[0017] Figure 2 is a schematic structural diagram of another ultra-short-throw laser projection device provided by an embodiment of the present disclosure;

[0018] Figure 3 is a structural schematic diagram of another ultra-short-throw laser projection device provided by an embodiment of the present disclosure;

[0019] Figure 4 is a schematic diagram of the disassembled structure of an ultra-short-throw laser projection device provided by an embodiment of the present disclosure;

[0020] Figure 5 is a schematic diagram of a partial structure of an ultra-short-throw laser projection device provided by an embodiment of the present disclosure;

[0021] Figure 6 is a partial structural schematic diagram of another ultra-short-throw laser projection device provided by an embodiment of the present disclosure;

[0022] Figure 7 is a partial structural schematic diagram of another ultra-short-throw laser projection device provided by an embodiment of the present disclosure;

[0023] Figure 8 is a schematic diagram of sliding of a sliding wheel provided in an embodiment of the present disclosure;

[0024] Fig. 9 is a schematic diagram of establishing a first three-dimensional coordinate system based on a signal transmitter provided by an embodiment of the present disclosure;

[0025] Fig.10 It is a schematic diagram of a signal transmitter transmitting a signal and a signal receiver receiving a signal provided by an embodiment of the present disclosure;

[0026] Fig.11 is a schematic diagram of another method for determining the position of a signal receiver provided by an embodiment of the present disclosure;

[0027] Fig.12 is a schematic diagram of establishing a second three-dimensional coordinate system based on a host provided by an embodiment of the present disclosure;

[0028] Fig.13 is a schematic diagram of a host driving component adjusting the angle of a host provided by an embodiment of the present disclosure;

[0029] Fig.14 is a schematic diagram of another host driving component adjusting the angle of the host provided by an embodiment of the present disclosure;

[0030] Fig.15 It is a flow chart of a method for adjusting the placement status of a host provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0032] An ultra-short-throw laser projection device is provided in an embodiment of the present disclosure. The ultra-short-throw laser projection device refers to a laser projection device with a projection ratio less than a certain threshold. The threshold is generally 0.6 or 0.4. The projection ratio is the ratio of the projection distance to the width of the projected picture. The projection distance is the distance between the host and the projection screen in the laser projection device, and the width of the picture is the width of the picture projected by the optical engine in the host.

[0033] Figure 1 It is a structural schematic diagram of an ultra-short-throw laser projection device provided in an embodiment of the present disclosure. Figure 2 FIG. 1 is a schematic diagram of the structure of another ultra-short-throw laser projection device provided by an embodiment of the present disclosure. Figure 1 and Figure 2 As shown, the ultra-short-throw laser projection device may include a host 10 , a state parameter acquisition component 20 , a projection screen 30 , a host drive component 40 and a control component 50 .

[0034] The state parameter acquisition component 20 is connected to the control component 50, and is used to acquire the current state parameter of the host 10 and send the current state parameter to the control component 50. The current state parameter is used to indicate the current placement state of the host 10.

[0035] Optionally, the state parameter acquisition component 20 may acquire the current state parameters of the host 10 in real time. Alternatively, the current state parameters of the host 10 may be acquired periodically. Alternatively, the user may send an adjustment instruction to the control component 50 via a remote controller, and after receiving the adjustment instruction, the control component 50 may send the adjustment instruction to the state parameter acquisition component 20. After receiving the adjustment instruction, the state parameter acquisition component 20 may respond to the adjustment instruction and acquire the current state parameters of the host 10.

[0036] The control component 50 is also connected to the host driving component 40 , and is used to provide an adjustment signal to the host driving component 40 if it is detected that the current state parameter is different from the initial state parameter.

[0037] The initial state parameter is used to indicate the placement state of the host 10 when the image projected by the optical engine in the host 10 is located within the projection screen 30 and the size of the image is the initial size. The initial state parameter is a state parameter pre-stored in the control component 50, and the initial size is a fixed size pre-stored in the control component 50.

[0038] After receiving the current state parameter sent by the state parameter acquisition component 20, the control component 50 can compare whether the current state parameter is the same as the initial state parameter. If the current state parameter is the same as the initial state parameter, the control component 50 can determine that the host 10 has not been moved. That is, the control component 50 can determine that the image projected by the optical engine in the host 10 is located within the projection screen 30, and the size of the image is the initial size, then the control component 50 does not need to provide an adjustment signal to the host drive component 40. If the current state parameter is different from the initial state parameter, the control component 50 can determine that the host 10 has been moved, and the control component 50 can provide an adjustment signal to the host drive component 40.

[0039] The host driving component 40 is connected to the host 10 , and is used to adjust the placement state of the host 10 to the placement state indicated by the initial state parameter under the control of the adjustment signal.

[0040] In the embodiment of the present disclosure, when the host driving component 40 is adjusting the placement state of the host 10, the state parameter acquisition component 20 can acquire the current state parameters of the host 10 in real time, and can send the acquired current state parameters to the control component 50. If the control component 50 detects that the current state parameters are different from the initial state parameters, it can continue to send adjustment signals to the host driving component 40. The host driving component 40 can adjust the placement state of the host 10 in response to the adjustment signal, and the cycle is repeated until the control component 50 detects that the current state parameters sent by the state parameter acquisition component 20 are the same as the initial state parameters, and then stops sending adjustment signals to the host driving component 40. At this time, the picture projected by the optical engine in the host 10 is located in the projection screen 30, and the size of the picture is the initial size.

[0041] In summary, the embodiments of the present disclosure provide an ultra-short-throw laser projection device, in which the control component can determine that the host has been moved when it detects that the current state parameter sent by the state parameter acquisition component is different from the initial state parameter. The control component can then send an adjustment signal to the host drive component, and the host drive component can adjust the placement state of the host in response to the adjustment signal. Since the ultra-short-throw laser projection device can automatically detect the placement state of the host and automatically adjust the placement state of the host when the host is moved, there is no need for the user to manually adjust the placement state of the host in this process, thereby improving the reliability and efficiency of adjusting the placement state of the host.

[0042] refer to Figure 3 The state parameter acquisition component 20 may include a position detector 21 , the current state parameter may include the current position of the host 10 acquired by the position detector 21 , and the initial state parameter may include the initial position of the host 10 .

[0043] The adjustment signal may include a position adjustment signal, and the control component 50 is used to send a position adjustment signal to the host drive component 40 if it is detected that the current position is different from the initial position.

[0044] The host driving assembly 40 is used to adjust the position of the host 10 to an initial position in response to the position adjustment signal.

[0045] The initial position is a position pre-stored in the control component 50. The initial position and the current position can both be represented by coordinates in a reference coordinate system. The reference coordinate system can be a two-dimensional coordinate system XY. Accordingly, the coordinates of the initial position and the current position both include a first coordinate and a second coordinate. The plane formed by the two-dimensional coordinate system XY can be parallel to the support surface of the host 10, for example Figure 2 The TV cabinet 01 shown. The support surface may be perpendicular to the projection screen 30. Optionally, the reference coordinate system may also be a three-dimensional coordinate system.

[0046] Optionally, the position detector 21 can obtain the current position of the host 10 in real time and send the current position to the control component 50. Alternatively, the position detector 21 can periodically obtain the current position of the host 10 and send the current position to the control component 50. Alternatively, the adjustment instruction can be an adjustment instruction for a child. After receiving the position adjustment instruction sent by the user through the remote control, the control component 50 can start the position detector 21 so that the position detector 21 obtains the current position of the host 10 and sends the current position to the control component 50.

[0047] After receiving the current position sent by the position detector 21, the control component 50 can compare whether the first coordinate of the current position is the same as the first coordinate of the initial position, and whether the second coordinate of the current position is the same as the second coordinate of the initial position. If the first coordinate of the current position is the same as the first coordinate of the initial position, and the second coordinate of the current position is the same as the second coordinate of the initial position, the control component 50 can determine that the current position is the same as the initial position, and there is no need to send an adjustment signal to the host drive component 40. If the first coordinate of the current position is not the same as the first coordinate of the initial position; or the second coordinate of the current position is not the same as the second coordinate of the initial position; or the first coordinate of the current position is not the same as the first coordinate of the initial position, and the second coordinate of the current position is not the same as the second coordinate of the initial position, the control component 50 can determine that the current position is not the same as the initial position, and send a position adjustment signal to the host drive component 40.

[0048] In the embodiment of the present disclosure, after the user adjusts the placement state of the host 10 for the first time so that the image projected by the optical engine in the host 10 is located within the projection screen 30 and the size of the image is the initial size, the user can send a position detection instruction to the control component 50 through the remote control. After receiving the position detection instruction, the control component 50 can send the position detection instruction to the position detector 21. The position detector 21 can obtain the initial position of the host 10 in response to the position detection instruction, and send the initial position to the control component 50. After receiving the initial position, the control component 50 can store the initial position.

[0049] refer to Figure 3 and Figure 4 The housing 11 of the host 10 may include an upper housing 110 and a lower housing 111. The host drive assembly 40 includes a plurality of position adjustment subassemblies 41 (eg Figure 3 Only one position adjustment subassembly 41 is shown in the figure, and each position adjustment subassembly 41 may include a first driving circuit 410, a first motor 411 and a sliding wheel 412.

[0050] The first driving circuit 410 is located in the housing 11 of the host 10 and is connected to the control component 50 and the first motor 411 respectively. The first driving circuit 410 is used to provide a first driving current to the first motor 411 in response to the position adjustment signal.

[0051] refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 The first motor 411 is located on a side of the lower housing close to the upper housing 110 and is connected to a sliding wheel 412. The sliding wheel 412 is located on a side of the lower housing 111 away from the upper housing 110. The first motor 411 is used to drive the sliding wheel 412 to slide under the drive of the first driving current to adjust the position of the host 10.

[0052] Figure 4 It is shown that four sliding wheels 412 are provided on a side of the lower housing 111 away from the upper housing 110 .

[0053] refer to Figure 2 and Figure 3, the host 10 is placed on the TV cabinet 01. For each position adjustment subassembly 41, the position adjustment subassembly 41 adjusts the position of the host 10, and the position detector 21 can obtain the current position of the host 10 in real time, and send the current position to the control component 50. When the control component 50 detects that the current position is different from the initial position, it can continue to send a position adjustment signal to the first drive circuit 410. The first drive circuit 410 can continue to respond to the position adjustment signal and provide the first drive current to the first motor 411. Correspondingly, the first motor 411 can continue to drive the sliding wheel 412 to slide on the TV cabinet 01 under the drive of the first drive current. This cycle is repeated until the control component 50 detects that the current position of the host 10 is the same as the initial position, and sends a closing instruction to the position detector 21. After receiving the closing instruction, the position detector 21 can respond to the closing instruction and no longer obtain the current position of the host 10.

[0054] In the embodiment of the present disclosure, each sliding wheel 412 can drive the host 10 to move forward, backward, turn, etc. under the drive of the corresponding first motor 411, thereby improving the efficiency and flexibility of adjusting the position of the host, and at the same time improving the stability and accuracy of adjusting the position of the host. Figure 8 Each sliding wheel 412 can drive the main machine 10 to move forward along the direction s under the drive of the corresponding first motor 411.

[0055] Optional, reference Figure 4 The position detector 21 may include a signal receiver 210 and at least two spaced signal transmitters 211. Each signal transmitter 211 is located on a side of the projection screen 30 close to the host 10, and the signal receiver 210 is located on the housing 11 of the host 10 and on a side of the housing 11 close to the projection screen 30. Figure 4 It is shown that the position detector 21 includes two signal transmitters 211 , and the projection screen 30 may be a quadrilateral, such as a rectangle, and the two signal transmitters 211 are respectively located at the top corners of the projection screen 30 on a side close to the host 10 .

[0056] In an optional implementation of the present disclosure, reference Figure 4 The signal transmitter 211 is used to transmit a laser signal, and the signal receiver 210 is used to receive the laser signal transmitted by the signal transmitter 211.

[0057] Optionally, the control component 50 may send a start instruction to the two signal transmitters 211 and the signal receiver 210 after receiving a position adjustment instruction sent by the user via a remote controller. Fig. 9 , Fig.10According to (1) and (2) in the above, the signal receiver 210 can establish a first three-dimensional coordinate system XYZ with a signal transmitter 211 as the origin, and the first three-dimensional coordinate system XYZ includes a first axis X, a second axis Y and a third axis Z. After receiving the start instruction, each signal transmitter 211 can rotate with the second axis Y and the third axis Z as the rotation axis and emit a laser signal. Each signal transmitter 211 rotates with the third axis Z as the rotation axis to form Fig.10 Each signal transmitter 211 is formed with the second axis Y as the rotation axis Fig.10 The second plane shown in (2).

[0058] refer to Fig.10 In (3), the signal receiver 210 may start timing after receiving the start instruction, and after receiving the laser signal sent by a signal transmitter 211, determine the difference between the timing start time and the time of receiving the laser signal sent by the signal transmitter 211 as the first rotation time t1 of the signal transmitter 211. The signal receiver 210 may determine the straight line L1 where the first plane and the second plane intersect in the first three-dimensional coordinate system XYZ according to the first rotation time t1 and the first rotation angular velocity ω1 of the signal transmitter 211. The straight line L1 is the line between the signal transmitter 211 and the signal receiver 210.

[0059] Similarly, reference Fig.10 In (iv), after receiving the laser signal sent by another signal transmitter 211, the signal receiver 210 may determine the difference between the start timing time and the time of receiving the laser signal sent by the other signal transmitter 211 as the second rotation duration t2 of the other signal transmitter 211. The signal receiver 210 may determine the straight line L2 between the other signal transmitter 211 and the signal receiver 210 in the first three-dimensional coordinate system XYZ according to the second rotation duration t2 and the second rotation angular velocity ω2 of the other signal transmitter 211. Thereafter, the signal receiver 210 may determine the coordinates of the intersection of the straight line L1 and the straight line L2 in the first three-dimensional coordinate system XYZ as the coordinates of the signal receiver 210, that is, the coordinates of the current position. Among them, the first rotation angle ω1 and the second rotation angle ω2 may be fixed values ​​pre-stored in the signal receiver 210.

[0060] In another optional implementation, the signal transmitter 211 is used to transmit a pulse signal, and the signal receiver 210 is used to receive the pulse signal transmitted by the signal transmitter 211. The signal receiver 210 can determine the distance between itself and each signal receiver 210 according to the phase difference of the received pulse signal.

[0061] refer to Fig.11The signal receiver 210 can establish a two-dimensional coordinate system X0Y0 with a signal transmitter 211 as the origin, and the two-dimensional coordinate system can include a horizontal axis X0 and a vertical axis Y0. The signal receiver 210 can determine a first distance R1 between it and a signal transmitter 211, and can determine a second distance R2 between it and another signal transmitter 211. The signal receiver 210 can determine the position of the signal receiver 210 based on the first distance R1, the second distance R2 and the distance L0 between the two signal transmitters 211, thereby determining the position as the current position of the host 10. The first coordinate of the current position The second coordinate of the current position

[0062] Optional, reference Figure 3 The state parameter acquisition component 20 may also include an angle detector 22, which is located in the shell of the host 10. The current state parameter includes the current tilt angle of the host 10 obtained by the angle detector 22. The initial state parameter includes the initial tilt angle of the host 10. The tilt angle of the host refers to the angle between the line connecting the host 10 and the reference point and the reference coordinate axis.

[0063] Optionally, the adjustment signal may include an angle adjustment signal, and the control component 50 is used to send an angle adjustment signal to the host drive component 40 if it is detected that the current tilt angle is different from the initial tilt angle. The host drive component 40 is used to adjust the tilt angle of the host 10 to the initial tilt angle in response to the angle adjustment signal. The initial tilt angle is a fixed tilt angle pre-stored in the control component 50.

[0064] In the embodiments of the present disclosure, reference Fig.12 , the angle detector 22 can establish a second three-dimensional coordinate system X1Y1Z1 based on the host 10, and the second three-dimensional coordinate system includes a first axis X1, a second axis Y1 and a third axis Z1. The reference point can be the origin O of the second three-dimensional coordinate system. The line connecting the host 10 and the reference point is the line L3 between the host 10 and the origin O. The reference coordinate axis can include the first axis X1, the second axis Y1 and the third axis Z1. Accordingly, the initial tilt angle and the current tilt angle can both include the first tilt angle, the second tilt angle and the third tilt angle.

[0065] The first tilt angle of the initial tilt angle is the angle between the orthographic projection of the line L3 in the Y1Z1 plane and the third axis Z1 when the image projected by the optical engine in the host 10 is located in the projection screen 30 and the size of the image is the initial size. The second tilt angle of the initial tilt angle is the angle between the orthographic projection of the line L3 in the X1Z1 plane and the first axis X1 when the image projected by the optical engine in the host 10 is located in the projection screen 30 and the size of the image is the initial size. The third tilt angle of the initial tilt angle is the angle between the orthographic projection of the line L3 in the Y1X1 plane and the second axis Y1 when the image projected by the optical engine in the host 10 is located in the projection screen 30 and the size of the image is the initial size.

[0066] The first tilt angle of the current tilt angle is the angle between the current orthographic projection of the line L3 in the Y1Z1 plane and the third axis Z1. The second tilt angle of the current tilt angle is the angle between the current orthographic projection of the line L3 in the X1Z1 plane and the first axis X1. The third tilt angle of the current tilt angle is the angle between the current orthographic projection of the line L3 in the Y1X1 plane and the second axis Y1.

[0067] In the embodiment of the present disclosure, the angle detector 22 can obtain the current tilt angle of the host 20 in real time, or can also periodically obtain the current tilt angle of the host 10. Alternatively, the adjustment instruction is an angle adjustment instruction, and the control component 50 can obtain the current tilt angle of the host 10 after receiving the angle adjustment instruction sent by the user through the remote control.

[0068] After acquiring the first tilt angle, the second tilt angle and the third tilt angle of the current tilt angle, the angle detector 22 can send the first tilt angle, the second tilt angle and the third tilt angle of the current tilt angle to the control component 50. After receiving the first tilt angle, the second tilt angle and the third tilt angle of the current tilt angle, the control component 50 can respectively compare whether the first tilt angle of the current tilt angle is the same as the first tilt angle of the initial tilt angle, whether the second tilt angle of the current tilt angle is the same as the second tilt angle of the initial tilt angle, and whether the third tilt angle of the current tilt angle is the same as the third tilt angle of the initial tilt angle. If any current tilt angle is different from the initial tilt angle, an angle adjustment signal can be sent to the host drive component 40, and the host drive component 40 can adjust the tilt angle of the host 10 in response to the angle adjustment signal. This cycle continues until the control component 50 stops sending the angle adjustment signal to the host drive component 40 when it detects that the first tilt angle of the current tilt angle is the same as the first tilt angle of the initial tilt angle, the second tilt angle of the current tilt angle is the same as the second tilt angle of the initial tilt angle, and the third tilt angle of the current tilt angle is the same as the third tilt angle of the initial tilt angle.

[0069] In the embodiment of the present disclosure, after the placement state of the host 10 is adjusted for the first time so that the image projected by the optical engine in the host 10 is located within the projection screen 30 and the size of the image is the initial size, an angle detection instruction can be sent to the control component 50 through the remote controller. After receiving the angle detection instruction, the control component 50 can send the angle detection instruction to the angle detector 22. The angle detector 22 can obtain the initial tilt angle of the host 10 in response to the angle detection instruction, and send the initial tilt angle to the control component 50. After receiving the initial tilt angle, the control component 50 can store the initial tilt angle.

[0070] refer to Figure 3 , Figure 4 , Figure 5 and Fig.13 The host drive assembly 40 may also include a plurality of angle adjustment subassemblies 42 (eg Figure 3 Only one angle adjustment subassembly 42 is shown, and each angle adjustment subassembly 42 may include a second drive circuit 420 , a second motor 421 , and a lifting assembly 422 .

[0071] The second driving circuit 420 is located in the housing 11 of the host 10 and is connected to the control component 50 and the second motor 421 respectively. The second driving circuit 420 is used to provide a second driving current to the second motor 421 in response to the angle adjustment signal.

[0072] The second motor 421 is located on one side of the lower shell 111 close to the upper shell 110 and is connected to the lifting assembly 422. The lifting assembly 422 is connected to the lower shell 111. The second motor 421 is used to drive the lifting assembly 422 to rise or fall under the drive of the second driving current to adjust the tilt angle of the host 10.

[0073] Figure 4 and Fig.13 The main engine driving assembly 40 is shown to include four second motors 421 and four lifting assemblies 422. The lower housing 111 may be a quadrilateral, such as a rectangle. The four lifting assemblies are respectively located at the top corners of the lower housing 111. The four lifting assemblies 422 are respectively a first lifting assembly 422a, a second lifting assembly 422b, a third lifting assembly 422c and a fourth lifting assembly 422d.

[0074] For example, assuming that the second tilt angle of the initial tilt angle is 0, and the second tilt angle of the current tilt angle is α, if the second tilt angle α of the current tilt angle is greater than 0, it indicates that the host 10 rotates along the first direction with the second axis Y1 as the rotation axis. If the target second tilt angle α is less than 0, it indicates that the host 10 rotates along the second direction with the second axis Y1 as the rotation axis. The first direction is clockwise, and the second direction is counterclockwise.

[0075] Assume that α is greater than 0, refer to Fig.13 and Fig.14 , the control component 50 can determine that the host 10 currently rotates α-0 degrees along the first direction with the second axis Y1 as the rotation axis, that is, rotates α degrees, then the control component 50 can send an angle adjustment signal to each second drive circuit 420, and each second drive circuit 420 is used to respond to the angle adjustment signal and provide a second drive current to the corresponding second motor 421. Each second motor 421 can drive the corresponding lifting component 422 to rise or fall under the drive of the second drive current to adjust the tilt angle of the host 10.

[0076] The first lifting assembly 422a and the third lifting assembly 422c are driven by the corresponding second motor 421 to descend in one direction k1, and the second lifting assembly 422b and the fourth lifting assembly 422d are driven by the corresponding second motor 421 to ascend in another direction k2, thereby driving the host 10 to rotate α degrees along the second direction with the second axis Y1 as the rotation axis, so that in the coordinate system X1Z1, the angle between the orthographic projection of the connecting line L3 in the X1Z1 plane and the first axis X1 becomes the second inclination angle 0 of the initial inclination angle. At this time, the host 10 is Fig.14 The state 03 shown changes to the state 02 , and the image projected and displayed by the host 10 moves from the position 05 to the position 04 .

[0077] Optional, reference Figure 5 The lifting assembly 422 may include a gear 4220, a rack 4221, a first lifting rod ( Figure 5 not shown) and a second lifting rod 4222.

[0078] refer to Figure 4 and Figure 5 A plurality of through holes 06 are provided on the lower shell 111, one end of the first lifting rod passes through the through hole 06 and is located on a side of the lower shell 111 away from the upper shell 110, the other end of the first lifting rod is slidably connected to the second lifting rod 4222, and the rack 4221 is located on the second lifting rod 4222.

[0079] The gear 4220 is located in the housing of the host 10, and is connected to the second motor 421 and meshes with the rack 4221. The gear 4220 is used to drive the rack 4221 and the second lifting rod 4222 to rise or fall relative to the first lifting rod under the drive of the second motor 421, thereby driving the host 10 to rise or fall.

[0080] Optionally, the first lifting rod passes through the through hole 06 and is connected to the sliding wheel 412 .

[0081] Optionally, the angle detector 22 may be a gyroscope.

[0082] refer to Figure 4 and Figure 5 The ultra-short-focus laser projection device may further include a plurality of fixing members 07, each of which is located on a side of the lower shell 111 close to the upper shell 110, and the orthographic projection of the fixing member 07 on the lower shell 111 overlaps with the orthographic projection of the through hole 06 on the lower shell 111, and the fixing member 07 is used to fix the second lifting rod 4222.

[0083] In summary, the embodiments of the present disclosure provide an ultra-short-throw laser projection device, in which the control component can determine that the host has been moved when it detects that the current state parameter sent by the state parameter acquisition component is different from the initial state parameter. The control component can then send an adjustment signal to the host drive component, and the host drive component can adjust the placement state of the host in response to the adjustment signal. Since the ultra-short-throw laser projection device can automatically detect the placement state of the host and automatically adjust the placement state of the host when the host is moved, there is no need for the user to manually adjust the placement state of the host in this process, thereby improving the reliability and efficiency of adjusting the placement state of the host.

[0084] Fig.15 is a flow chart of a method for adjusting the placement status of a host provided by an embodiment of the present disclosure. The adjustment method can be applied to Figure 1 , Figure 2 , Figure 3 or Figure 4 The control component 50 in the ultra-short-throw laser projection device shown in FIG. Figure 1 , Figure 2 , Figure 3 or Figure 4 The ultra-short-throw laser projection device may further include a host 10, a state parameter acquisition component 20, a projection screen 30, and a host drive component 40. The control component 50 is connected to the state parameter acquisition component 20 and the host drive component 40, respectively, and the host drive component 40 is also connected to the host 10. Fig.15 As shown, the method may include:

[0085] Step 1501, receiving the current state parameters sent by the state parameter acquisition component.

[0086] Among them, the current status parameter is used to indicate the current placement status of the host.

[0087] Step 1502: If it is detected that the current state parameter is different from the initial state parameter, an adjustment signal is provided to the host driving component.

[0088] The adjustment signal is used to control the host driving component 40 to adjust the placement state of the host 10 to the placement state indicated by the initial state parameter. The initial state parameter is used to indicate the placement state of the host 10 when the image projected by the optical engine in the host 10 is located within the projection screen 30 and the size of the image is the initial size.

[0089] In the disclosed embodiment, the method for adjusting the placement status of the host is applicable to resetting or positioning an ultra-short-throw laser projection device.

[0090] In summary, the embodiments of the present disclosure provide a method for adjusting the placement state of a host, which can determine that the host has been moved when it is detected that the current state parameter sent by the state parameter acquisition component is different from the initial state parameter. The control component can then send an adjustment signal to the host drive component, and the host drive component can adjust the placement state of the host in response to the adjustment signal. Since the placement state of the host can be automatically detected and the placement state of the host can be automatically adjusted when the host is moved, the user does not need to manually adjust the placement state of the host in this process, thereby improving the reliability and efficiency of adjusting the placement state of the host.

[0091] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An ultra-short-throw laser projection device, characterized in that: The ultra-short-throw laser projection device comprises: a host, a state parameter acquisition component, a projection screen, a host drive component, and a control component; wherein the state parameter acquisition component comprises a position detector and an angle detector; The state parameter acquisition component is connected to the control component, and is used to acquire the current state parameters of the host and send the current state parameters to the control component. The current state parameters are used to indicate the current placement state of the host, and the current state parameters include the current position of the host acquired by the position detector and the current tilt angle of the host acquired by the angle detector; The control component is also connected to the host drive component, and the control component is used to provide a position adjustment signal to the host drive component if it is detected that the current position is different from the initial position in the initial state parameter, and to send an angle adjustment signal to the host drive component if it is detected that the current tilt angle is different from the initial tilt angle in the initial state parameter; wherein the initial state parameter is used to indicate the placement state of the host when the picture projected by the optical engine in the host is located within the projection screen and the size of the picture is the initial size, and the tilt angle of the host refers to the angle between the line connecting the host and the reference point and the reference coordinate axis; The host driving component is connected to the host, and is used to adjust the position of the host to the initial position in response to the position adjustment signal, and to adjust the tilt angle of the host to the initial tilt angle in response to the angle adjustment signal.

2. The ultra-short-throw laser projection device according to claim 1, characterized in that: The housing of the host comprises an upper housing and a lower housing; the host driving assembly comprises a plurality of position adjustment subassemblies, each of which comprises a first driving circuit, a first motor and a sliding wheel; The first drive circuit is located in the housing of the host and is connected to the control component and the first motor respectively, and the first drive circuit is used to provide a first drive current to the first motor in response to the position adjustment signal; The first motor is located on a side of the lower shell close to the upper shell and is connected to the sliding wheel. The sliding wheel is located on a side of the lower shell away from the upper shell. The first motor is used to drive the sliding wheel to slide under the drive of the first driving current to adjust the position of the host.

3. The ultra-short-throw laser projection device according to claim 1, characterized in that: The position detector comprises: a signal receiver and at least two signal transmitters arranged at intervals; Each of the signal transmitters is located on a side of the projection screen close to the host; The signal receiver is located on the housing of the host and on a side of the housing close to the projection screen.

4. The ultra-short-throw laser projection device according to any one of claims 1 to 3, characterized in that: The housing of the host comprises: an upper housing and a lower housing; the host driving assembly comprises a plurality of angle adjustment subassemblies, each of which comprises a second driving circuit, a second motor and a lifting assembly; The second driving circuit is located in the housing of the host and is connected to the control component and the second motor respectively, and the second driving circuit is used to provide a second driving current to the second motor in response to the angle adjustment signal; The second motor is located on a side of the lower shell close to the upper shell and is connected to the lifting assembly, and the lifting assembly is connected to the lower shell. The second motor is used to drive the lifting assembly to rise or fall under the drive of the second driving current to adjust the tilt angle of the host.

5. The ultra-short-throw laser projection device according to claim 4, characterized in that: The lifting assembly comprises: a gear, a rack, a first lifting rod and a second lifting rod; The lower shell is provided with a plurality of through holes, one end of the first lifting rod passes through the through holes and is located at a side of the lower shell away from the upper shell, the other end of the first lifting rod is slidably connected to the second lifting rod, and the rack is located on the second lifting rod; The gear is located in the housing of the host, is connected to the second motor, and is meshed with the rack. The gear is used to drive the rack and the second lifting rod to rise or fall relative to the first lifting rod under the drive of the second motor.

6. The ultra-short-throw laser projection device according to claim 5, characterized in that: The first lifting rod passes through the through hole and is connected to the sliding wheel in the host driving assembly.

7. The ultra-short-throw laser projection device according to any one of claims 1 to 3, characterized in that: The angle detector is a gyroscope.

8. A method for adjusting the placement state of a host, characterized in that: A control component applied to an ultra-short-throw laser projection device as claimed in any one of claims 1 to 7, wherein the ultra-short-throw laser projection device further comprises: a host, a state parameter acquisition component, a projection screen and a host drive component, wherein the control component is connected to the state parameter acquisition component and the host drive component respectively, and the host drive component is also connected to the host; wherein the state parameter acquisition component comprises a position detector and an angle detector; and the method comprises: receiving a current state parameter sent by the state parameter acquisition component, wherein the current state parameter is used to indicate a current placement state of the host, and the current state parameter includes a current position of the host acquired by the position detector and a current tilt angle of the host acquired by the angle detector; If it is detected that the current position is different from the initial position in the initial state parameter, a position adjustment signal is provided to the host driving component, wherein the position adjustment signal is used to control the host driving component to adjust the position of the host to the initial position; If it is detected that the current tilt angle is different from the initial tilt angle in the initial state parameter, an angle adjustment signal is provided to the host driving component, wherein the angle adjustment signal is used to control the host driving component to adjust the tilt angle of the host to the initial tilt angle; Among them, the initial state parameter is used to indicate the placement state of the host when the picture projected by the optical engine in the host is located within the projection screen and the size of the picture is the initial size. The tilt angle of the host refers to the angle between the line connecting the host and the reference point and the reference coordinate axis.

Images