CN110716383A - Integrated projector - Google Patents
Integrated projector Download PDFInfo
- Publication number
- CN110716383A CN110716383A CN201910948161.6A CN201910948161A CN110716383A CN 110716383 A CN110716383 A CN 110716383A CN 201910948161 A CN201910948161 A CN 201910948161A CN 110716383 A CN110716383 A CN 110716383A
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- curtain
- distance
- projection
- sensing
- accommodating
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
The invention relates to an integrated projector which comprises a projection part, a curtain, an accommodating part, a lifting part, a sensing part and a control part, wherein the projection part is used for projecting light rays to the curtain to form a projection picture. The accommodating part is connected with the projection part to form an integral structure. The curtain comprises a recovery state accommodated in the accommodating part and a development state extended out of the accommodating part by the lifting part. The sensing part is used for sensing the sliding resistance of the sliding support, and when the sliding resistance sensed by the sensing part exceeds a preset threshold value, the control part stops the lifting part to drive the curtain to move in a stretching mode. According to the integrated projector, the motion state of the lifting part is monitored by the sensing part, so that the telescopic motion of the curtain can be stopped in time when the curtain is blocked in the process of unfolding or folding, and accidents are prevented.
Description
Technical Field
The invention relates to the technical field of projection, in particular to an integrated projector capable of safely and automatically lifting.
Background
The integral type projecting apparatus is because the integrated design of projecting apparatus cooperation lift curtain, and the appearance is compacter, is convenient for transport and carries. The integral type projecting apparatus can not receive the place restriction in its use because of having had the lift curtain certainly, and it is more convenient than the scheme that traditional projecting apparatus adopted jumbo size TV or hard screen curtain, white wall etc. as the projection light carrier.
When a client uses the integrated projector, the lifting motor is driven to rotate by the starting trigger control system, and the curtain contained in the integrated projector is lifted. When the motor rotates to a certain position, the motor automatically stops rotating to complete the lifting action. After the screen is used, the lifting motor is driven to rotate reversely by the shutdown trigger control system, and the screen is lowered and contained in the integrated projector. However, when the height of the integrated projector is limited, or the integrated projector enters impurities during transportation or lifting of the curtain to cause jamming, the curtain cannot be lifted continuously, which easily causes overload of the lifting motor or damage to the curtain lifting mechanism of the integrated projector.
Disclosure of Invention
The invention provides an integrated projector capable of safely and automatically lifting, which specifically comprises the following technical scheme:
an integral projector comprising:
a projection part for emitting projection light;
a curtain for receiving the light emitted by the projection part to form a projection picture, wherein the curtain comprises an expansion state and a recovery state
The accommodating part is connected with the projection part and is used for accommodating the curtain in a recovery state;
the lifting part is fixedly connected with the accommodating part and comprises a lifting motor and a sliding support, the sliding support is fixedly connected with the first end of the curtain, and the lifting motor controls the sliding support to stretch and slide so that the curtain extends out of the accommodating part to switch the curtain from the recovery state to the expansion state;
the sensing part is arranged on the lifting part and used for sensing the sliding resistance of the sliding bracket;
and the control part is respectively electrically connected with the lifting motor and the sensing part and is used for controlling the stretching of the sliding support through the lifting motor and stopping the stretching movement of the sliding support when the sliding resistance sensed by the sensing part exceeds a preset threshold value.
The sensing part is a pressure sensor, and the pressure sensor is arranged on the sliding support.
The sensing part is a torque sensor, and the torque sensor is arranged in the lifting motor.
The lifting motor is a bidirectional motor, and the control part sends a lifting signal with a rotating direction to the lifting motor so as to control the lifting motor to rotate forwards or backwards.
The integrated projector further comprises a distance sensing portion, the distance sensing portion is electrically connected with the control portion, and the distance sensing portion is used for sensing the distance between the first end of the curtain and the accommodating portion.
The distance sensing portion is a distance measuring sensor, the distance measuring sensor is arranged on the sliding support and used for detecting the telescopic distance of the sliding support so as to sense the distance between the first end and the accommodating portion.
The distance sensing portion is an angle sensor, the angle sensor is arranged in the lifting motor, and the angle sensor is used for detecting a torsion angle of an output shaft of the lifting motor so as to sense the distance between the first end and the accommodating portion.
The distance sensing part is further used for transmitting the real-time distance of the first end relative to the accommodating part to the control part when the sliding resistance sensed by the sensing part exceeds a preset threshold value.
The control part is electrically connected with the projection part and is also used for controlling the proportion of the projection light emitted by the projection part based on the real-time distance.
The projection part is in rotational connection with the accommodating part, and the control part is further used for controlling the rotation angle of the projection part relative to the accommodating part based on the real-time distance.
The integrated projector of the invention forms a projection picture by projecting light rays towards the curtain in the unfolding state through the projection part, and forms an integrated structure by connecting the projection part and the accommodating part. In order to be convenient to carry, the integral projector further reduces the volume of the integral projector by accommodating the curtain in the recovery state through the accommodating part. The integrated projector according to the present invention is configured such that the control unit performs an operation of raising and lowering the raising and lowering unit to switch the screen between the expanded state and the accommodated state. The sensor part monitors the sliding resistance of the lifting part, and whether the lifting part meets abnormal resistance or not can be judged. When the sliding resistance sensed by the sensing part exceeds a preset threshold value, the control part stops the lifting part to drive the curtain to move telescopically. Therefore, the integrated projector can stop the operation of the lifting part in time when abnormal clamping stagnation occurs in the lifting process of the curtain, so as to avoid damage to the lifting motor or the sliding support or accidental injury caused by the lifting of the curtain.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below.
Fig. 1 is a schematic view of an integrated projector according to the present invention, in which a curtain is in an expanded state;
FIG. 2 is a schematic view of a portion of a curtain in a retracted state in an integrated projector according to the present invention;
fig. 3 is a schematic diagram of a frame of a sensing part in another embodiment of the integrated projector provided by the present invention;
fig. 4 is a schematic diagram of a frame of a sensing part in another embodiment of the one-piece projector according to the present invention;
FIG. 5 is a schematic block diagram of another embodiment of an integral projector provided by the present invention;
FIG. 6 is a schematic view of a frame of a distance sensing part in another embodiment of the integrated projector according to the present invention;
fig. 7 is a schematic diagram of a frame of a distance sensing part in another embodiment of the integrated projector according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an integrated projector 100 according to the present invention includes a projecting portion 10, a curtain 20, a receiving portion 30, an elevating portion 40, a sensing portion 50, and a control portion 60. Wherein the projection part 10 is used for emitting projection light to the curtain 20, and the curtain 20 forms a projection picture after receiving the light emitted by the projection part 10, it should be mentioned that the curtain 20 includes two states of an expanded state and a recovery state, and in the schematic diagram of fig. 1, the curtain 20 is in the expanded state and is used for receiving the light emitted by the projection part 10. Referring to fig. 2, the curtain 20 is accommodated in the accommodating portion 30 in a recycling state. In one embodiment, the accommodating portion 30 includes a rotating shaft 31 and an opening 32, the curtain 20 in the unfolded state continuously enters the accommodating portion 30 from the position of the opening 32, and the rotating shaft 31 is continuously rotated to wind the curtain 20 around the rotating shaft 31, so that the accommodating portion 30 accommodates the curtain 20.
The accommodating part 30 is integrally connected with the projection part 10, and when the curtain 20 is in the recovery state, the external main structure of the integrated projector 100 of the present invention only comprises the projection part 10 and the accommodating part 30, which facilitates the transportation and carrying of the integrated projector 100. The elevating portion 40 is fixedly connected to the accommodating portion 30, and the elevating portion 40 includes an elevating motor 41 and a sliding bracket 42. The sliding bracket 42 is fixedly connected to the first end 21 of the curtain 20, and the sliding bracket 42 includes a fixing frame 421 fixedly connected to the accommodating portion 30, and a sliding frame 422 capable of sliding and extending relative to the fixing frame 421. The sliding bracket 422 is fixedly coupled to the first end 21 of the curtain 20. The lifting motor 41 controls the telescopic sliding of the sliding bracket 42 to extend the curtain 20 from the accommodating part 30 and realize the switching of the curtain 20 from the recovery state to the expansion state; or the lifting motor 41 controls the sliding bracket 42 to slide in a telescopic manner so that the curtain 20 is retracted into the accommodating part 30, so as to switch the curtain 20 from the unfolding state to the recovery state. It can be understood that, since the fixing frame 421 is fixedly connected to the accommodating portion 30, the expansion and contraction control of the sliding bracket 42 by the lifting motor 41 is actually the expansion and contraction control of the sliding frame 422 by the lifting motor 41. As for the transmission manner between the lifting motor 41 and the carriage 422, the chain transmission, belt transmission, gear transmission, lead screw transmission including link transmission, etc. in the prior art can be applied to the integrated projector 100 of the present invention. The sliding arrangement between the sliding rack 422 and the fixed rack 421 can also be realized by adopting various sliding rails in the prior art, which is not particularly limited by the invention.
The sensing part 50 is provided at the elevating part 40, and the sensing part 50 is used for sensing sliding resistance of the sliding bracket 42 during the expansion and contraction process. The control unit 60 is electrically connected to the elevator motor 41 and the sensing unit 50, and receives the sliding resistance of the sliding bracket 42 monitored by the sensing unit 50 in real time. The control unit 60 is also used to control the extension and contraction of the sliding bracket 42 by the elevating motor 41. It can be understood that when the sliding of the sliding frame 422 in the sliding support 42 relative to the fixed frame 421 is normal, the sliding resistance inside the sliding support 42 is relatively stable, and the curtain 20 can be arbitrarily extended or retracted under the driving of the lifting motor 41. But due to its portability, the all-in-one projector 100 has a possibility of frequently switching the external environment. Due to the limitations of different external environments, the one-piece projector 100 may suffer from the limitation that the curtain 20 cannot be completely unfolded due to the narrow space height; or the sliding bracket 42 is blocked by the sliding of the sliding rack 422 relative to the fixed rack 421 because foreign matters in the external environment enter; or an unexpected situation that the curtain 20 cannot be completely recovered because no foreign objects are placed between the first end 21 of the curtain 20 and the accommodating part 30. At this time, the sliding resistance inside the sliding bracket 42 is increased accordingly, which causes an increase in the load of the elevating motor 41. At this time, if the load of the elevating motor 41 is increased, it is easy to cause the defects of overload damage of the elevating motor 41 or damage of the sliding bracket 42.
In order to avoid this defect, the control unit 60 may find the sudden change of the load of the elevator motor 41 by receiving the sliding resistance of the sliding bracket 42 monitored by the transmission unit 50 in real time. At this time, the control part 60 may preset a threshold value, and stop the telescopic movement of the sliding bracket 42 in time when the sliding resistance sensed by the sensing part 50 exceeds the preset threshold value. The controller 60 is electrically connected to the elevation motor 41, and controls the elevation motor 41 to control the extension and contraction of the slide holder 42. The control unit 60 may stop the expansion and contraction of the sliding bracket 42 by controlling the elevator motor 41 to stop, the control unit 60 may stop the expansion and contraction of the sliding bracket 42 by controlling the elevator motor 41 to slip, and the control unit 60 may stop the expansion and contraction of the sliding bracket 42 even by controlling the elevator motor 41 to perform reverse rotation at a certain angle. When the control portion 60 stops or changes the operating state of the lifting motor 41 in time when the sliding resistance of the sliding bracket 42 changes abruptly, the lifting motor 41 can be prevented from being overloaded, so that the lifting portion 40 is protected from being damaged, and damage to the external environment of the integrated projector 100 is avoided.
Referring to fig. 3, the sensing portion 50 is implemented by a pressure sensor 51, and the pressure sensor 51 is disposed on the sliding bracket 42. Specifically, the pressure sensor 51 may be disposed on the sliding frame 422 or the fixing frame 421, so as to achieve the effect of sensing the sliding resistance of the sliding support 42 in real time.
Referring to fig. 4, the sensing portion 50 is implemented by a torque sensor 52. In this case, the torque sensor 52 needs to be installed inside the elevating motor 41, and the torque sensor 52 indirectly senses the sliding resistance of the sliding bracket 42 by sensing the torque output of the elevating motor 41 in real time. It can be understood that the torque output of the elevating motor 41 is relatively smooth when the sliding bracket 42 is sliding normally. When the sliding bracket 42 has a sudden change of the sliding resistance, the torque output of the elevator motor 41 will also suddenly change, and the torque sensor 52 can determine the sudden change of the sliding resistance of the sliding bracket 42 by sensing the torque output of the elevator motor 41.
In one embodiment, the lifting motor 41 is a bi-directional motor, and the lifting motor 41 has a driving force output for extending or retracting the sliding bracket 42. The bi-directional elevation motor 41 maintains the output of the driving force throughout the movement of the sliding bracket 42, thereby facilitating the control of the control part 60 on the extension and contraction movement of the sliding bracket 42 through the elevation motor 41. It can be understood that the lifting signal sent by the control unit 60 to the lifting motor 41 is a lifting signal with a turning direction. So that the control part 60 controls the elevating motor 41 to rotate forward or backward by the elevating signal with the rotating direction.
Referring to fig. 5, the integrated projector 100 further includes a distance sensing part 70. The distance sensing portion 70 is electrically connected to the control portion 60, and the distance sensing portion 70 is used for sensing a distance between the first end 21 of the curtain 20 and the accommodating portion 30. It is understood that when the curtain 20 is in the recycling state, the first end 21 of the curtain 20 may be in a fitting state or a state with a minimum relative distance from the accommodating portion 30. At this time, the distance sensing part 70 can sense that the curtain 20 has reached the recovery state by sensing the distance between the first end 21 and the accommodating part 30, and stop the operation of driving the sliding bracket 42 to continue the recovery by the lifting motor 41 by sending a signal to the electrically connected control part 60; conversely, when the curtain 20 is in the expanded state, the first end 21 of the curtain 20 is at a maximum distance from the receiving portion 30. The distance sensing part 70 senses that the curtain 20 is completely unfolded by sensing the distance from the first end 21 to the accommodating part 30, and sends a signal to the electrical connection control part 60 to stop the movement of the lifting motor 41 driving the sliding bracket 42 to extend.
Referring to fig. 6, the distance sensing part 70 is implemented by a distance measuring sensor 71. The distance measuring sensor 71 may be disposed on the sliding bracket 42, and the distance measuring sensor 71 is used for detecting the telescopic distance of the sliding bracket 42 to sense the distance of the first end 21 relative to the accommodating portion 30. Of course, in other embodiments, the ranging sensor 71 may also be disposed on the accommodating portion 30 for measuring the distance of the first end 21 relative to the accommodating portion 30.
Referring to fig. 7, another embodiment of the distance sensing part 70 is implemented by using an angle sensor 72, the angle sensor 72 is disposed in the elevating motor 41, and the angle sensor 72 is used for detecting a torsion angle of an output shaft of the elevating motor 41 to sense a distance of the first end 21 relative to the accommodating part 30. It can be understood that, because the first end 21 moves in a reciprocating linear motion relative to the accommodating portion 30, the output shaft of the lifting motor 41 for driving the movable bracket 42 is also in a reciprocating forward and reverse rotation operation state. When the curtain 20 is switched from the retracted state to the deployed state, the total torsion angle of the output shaft of the elevator motor 41 is constant. The certain total torsion angle is the same as the total torsion angle of the output shaft of the lifting motor 41 when the curtain 20 is switched from the unfolding state to the recovery state, and is in the forward direction and the reverse direction. Therefore, the angle sensor 72 is used to monitor the torsion angle of the output shaft of the lifting motor 41, so as to indirectly detect the distance between the first end 21 of the curtain 20 and the accommodating part 30.
In one embodiment, the distance sensing part 70 can also send a signal to the control part 60 in real time for detecting the distance of the first end 21 of the curtain 20 relative to the accommodating part 30 in real time. Thus, when the sliding resistance sensed by the sensing portion 50 exceeds the preset threshold, the control portion 60 can determine the position of the front curtain 20, that is, the real-time distance between the first end 21 and the accommodating portion 30 according to the real-time signal sent by the distance sensing portion 70. The control unit 60 may determine the real-time distance of the first end 21 from the accommodating unit 30, and may perform a specific function in conjunction with the control of the lifting motor 41 by the control unit 60. For example, when the control portion 60 senses that the distance between the first end 21 and the accommodating portion 30 is small, the sliding bracket 42 generates a large sliding resistance, and it can be determined that there is a large possibility that a foreign object, such as a remote controller, a pen, or even a human hand, is sandwiched between the first end 21 and the accommodating portion 30 in the current external environment and the first end 21 of the curtain 20 is located in the accommodating portion 30. At this time, the control unit 60 may control the lifting motor 41 to perform reverse rotation at a certain angle to loosen the clamped foreign objects, thereby preventing damage to the foreign objects or personal injury.
In one embodiment, the control portion 60 is further electrically connected to the projection portion 10, and when the control portion 20 stops the lifting motion of the curtain 20, so that the first end 21 of the curtain 20 is located at a relatively stable distance with respect to the accommodating portion 30, the control portion 60 can further control the proportion of the projected light emitted by the projection portion 10 based on the real-time distance of the first end 21 with respect to the accommodating portion 30 obtained by the distance sensing portion 70. The present embodiment corresponds to a scene in which the curtain 20 is in a relatively narrow space environment, and cannot be completely unfolded due to the limitation of the space height. At this time, the curtain 20 may be unfolded for a certain distance, but not reach a preset fully unfolded state. The distance over which the curtain 20 is deployed is already conditioned to receive the projected light. At this time, the control unit 60 adjusts the ratio of the projection light of the projection unit 10 based on the current expansion height of the curtain 20, that is, appropriately reduces the size of the screen projected by the projection unit 10, so as to adapt to the current height of the curtain 20 and complete the function of projection display. The embodiment provides a scheme that the integrated projector 100 of the invention can still perform the projection function when the height of the integrated projector 100 in the unfolded state cannot be completely reached, and widens the environmental compatibility of the integrated projector 100 of the invention.
In another embodiment, the projection unit 10 is rotatably connected to the accommodating unit 30, and the projection unit 10 can adjust a relative angle with respect to the accommodating unit 30 by a rotating shaft (not shown) having a driving force. After the control unit 60 is electrically connected to the driving source of the rotation shaft, the control unit 60 can also be used to control the relative angle of the projection unit 10 with respect to the accommodating unit 30. At this time, if the curtain 20 is unfolded for a certain distance and then stops being unfolded due to the sudden change of the sliding resistance, and the curtain 20 does not reach the preset fully-unfolded state, the distance that the curtain 20 is unfolded also meets the condition of receiving the projection light. The control unit 60 can also correspondingly adjust the rotation angle of the projection unit 10 relative to the accommodating unit 30 based on the current expansion height of the curtain 20, so as to appropriately reduce the angle and size of the screen projected by the projection unit 10 and adapt to the current height of the curtain 20, thereby completing the projection display function of the integrated projector 100.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (10)
1. An integrated projector, comprising:
a projection part for emitting projection light;
a curtain for receiving the light emitted by the projection part to form a projection picture, wherein the curtain comprises an expansion state and a recovery state
The accommodating part is connected with the projection part and is used for accommodating the curtain in a recovery state;
the lifting part is fixedly connected with the accommodating part and comprises a lifting motor and a sliding support, the sliding support is fixedly connected with the first end of the curtain, and the lifting motor controls the sliding support to stretch and slide so that the curtain extends out of the accommodating part to switch the curtain from the recovery state to the expansion state;
the sensing part is arranged on the lifting part and used for sensing the sliding resistance of the sliding bracket;
and the control part is respectively electrically connected with the lifting motor and the sensing part and is used for controlling the stretching of the sliding support through the lifting motor and stopping the stretching movement of the sliding support when the sliding resistance sensed by the sensing part exceeds a preset threshold value.
2. The integrated projector as claimed in claim 1, wherein the sensing part is a pressure sensor provided on the sliding bracket.
3. The integrated projector as claimed in claim 1, wherein the sensing part is a torque sensor provided in the elevator motor.
4. The integrated projector as claimed in claim 1, wherein the lift motor is a bi-directional motor, and the control unit sends a lift signal with a direction of rotation to the lift motor to control the lift motor to rotate forward or backward.
5. The integrated projector as claimed in claim 1, further comprising a distance sensor electrically connected to the controller, wherein the distance sensor is configured to sense a distance between the first end of the curtain and the accommodating portion.
6. The integrated projector as claimed in claim 5, wherein the distance sensor is a distance measuring sensor disposed on the sliding bracket, and the distance measuring sensor is configured to detect a telescopic distance of the sliding bracket to sense a distance of the first end relative to the accommodating portion.
7. The integrated projector as claimed in claim 5, wherein the distance sensing part is an angle sensor disposed in the elevator motor, the angle sensor being configured to detect a torsion angle of an output shaft of the elevator motor to sense a distance of the first end with respect to the accommodating part.
8. The integrated projector as claimed in any one of claims 5 to 7, wherein the distance sensing portion is further configured to transmit a real-time distance between the first end and the accommodating portion to the control portion when the sliding resistance sensed by the sensing portion exceeds a preset threshold.
9. The integrated projector as claimed in claim 8, wherein the control unit is further electrically connected to the projection unit, and the control unit is further configured to control a ratio of the projection light emitted from the projection unit based on the real-time distance.
10. The integrated projector as claimed in claim 9, wherein the projection part is rotatably connected to the accommodating part, and the control part is further configured to control a rotation angle of the projection part relative to the accommodating part based on the real-time distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910948161.6A CN110716383A (en) | 2019-09-30 | 2019-09-30 | Integrated projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910948161.6A CN110716383A (en) | 2019-09-30 | 2019-09-30 | Integrated projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110716383A true CN110716383A (en) | 2020-01-21 |
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ID=69212164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910948161.6A Pending CN110716383A (en) | 2019-09-30 | 2019-09-30 | Integrated projector |
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| Country | Link |
|---|---|
| CN (1) | CN110716383A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113031384A (en) * | 2021-03-15 | 2021-06-25 | 黄淮学院 | Portable projection arrangement of marketing training teaching |
| CN113376949A (en) * | 2020-02-25 | 2021-09-10 | 青岛海信激光显示股份有限公司 | Laser projection system and method for controlling ascending and descending of projection screen |
| CN114236960A (en) * | 2021-12-21 | 2022-03-25 | 厦门华厦学院 | Visual design projection device |
| EP4116957A4 (en) * | 2020-03-04 | 2023-08-16 | Sony Group Corporation | Information display device, method for controlling information display device, and information processing device |
| US11856338B2 (en) | 2020-02-25 | 2023-12-26 | Hisense Laser Display Co., Ltd | Projection apparatus and control method thereof |
-
2019
- 2019-09-30 CN CN201910948161.6A patent/CN110716383A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113376949A (en) * | 2020-02-25 | 2021-09-10 | 青岛海信激光显示股份有限公司 | Laser projection system and method for controlling ascending and descending of projection screen |
| US11856338B2 (en) | 2020-02-25 | 2023-12-26 | Hisense Laser Display Co., Ltd | Projection apparatus and control method thereof |
| EP4116957A4 (en) * | 2020-03-04 | 2023-08-16 | Sony Group Corporation | Information display device, method for controlling information display device, and information processing device |
| CN113031384A (en) * | 2021-03-15 | 2021-06-25 | 黄淮学院 | Portable projection arrangement of marketing training teaching |
| CN113031384B (en) * | 2021-03-15 | 2022-05-17 | 黄淮学院 | Portable projection arrangement of marketing training teaching |
| CN114236960A (en) * | 2021-12-21 | 2022-03-25 | 厦门华厦学院 | Visual design projection device |
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