CN110809142A - Projector with a light source - Google Patents

Abstract

The application provides a projector, projector includes: the casing is provided with an accommodating space, the projection device is accommodated in the accommodating space, the casing is provided with a light transmission part, the projection device is arranged corresponding to the light transmission part, the sliding door can slide relative to the casing and is provided with a first position for covering the light transmission part and a second position for exposing the light transmission part, the voice receiving device is used for receiving voice signals and converting the voice signals into audio electric signals, the memory stores preset instructions, the processor receives the audio electric signals and sends out driving instructions when the audio electric signals are matched with the preset instructions, and the driving device receives the driving instructions and drives the sliding door to slide relative to the casing. The projector has the advantages that the projector protects the projection device of the projector, and the operation of the projector is simplified due to the relative remote control and key pressing of the voice signal mode.

Description

Projector with a light source

Technical Field

The application relates to the field of projectors, in particular to a projector for controlling a startup and shutdown sliding door through voice.

Background

Currently, projectors are widely used. The projector usually needs to be placed at a fixed position, and when the projector is not used, the projector is easily full of dust due to long-time placement at the same position, so that the influence on a projection lamp of the projector is particularly great, and even the service life of the projector is influenced.

Generally, a user needs to cover a dust cloth or a dust cover on a projector lamp of a projector, or close a projection portion of the projector by using a remote controller or a button of the projector itself, so as to prevent dust. Such methods all require the user to operate and implement the methods in a manual and contact manner.

Disclosure of Invention

In order to remotely and simply perform corresponding operation on the projector, the projector is provided, and the remote and simple corresponding operation on the projector can be realized by taking voice as an input mode.

The application provides a projector, projector includes: casing, projection arrangement, pronunciation receiving arrangement, treater, memory, drive arrangement and sliding door, the casing has accommodating space, projection arrangement accept in the accommodating space, the printing opacity portion has on the casing, projection arrangement corresponds printing opacity portion sets up, the sliding door can be relative the casing slides and has and cover the first position of printing opacity portion and show the second position of printing opacity portion, pronunciation receiving arrangement is used for receiving voice signal, and will voice signal converts the audio signal into the audio signal, the memory storage has and predetermines the instruction, the treater is received the audio signal, and when the audio signal with predetermine the instruction and match, send drive instruction, drive arrangement receives drive instruction, and the drive the sliding door is relative the casing slides.

The application provides the projecting apparatus pronunciation receiving arrangement reaches drive arrangement has realized through speech signal right the projecting apparatus the sliding door is in first position with the gliding function of the relative casing in second position, is protecting the projecting apparatus while, relative remote control of speech signal's mode, button have simplified right the operation of projecting apparatus.

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 embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for a person skilled in the art to obtain other drawings based on the drawings without any inventive exercise.

Fig. 1 is a projector according to a first embodiment of the present application.

Fig. 2 is a schematic view of another state of the projector of fig. 1.

Fig. 3 is a front view of a projector according to a second embodiment of the present application.

Fig. 4 is a schematic diagram of a frame of a voice receiving apparatus according to an embodiment of the present application.

Fig. 5 is a schematic diagram of a speech permission sequence according to an embodiment of the present application.

Fig. 6 is a schematic view of a projector frame according to an embodiment of the present application.

Fig. 7 is a schematic view of a driving device according to an embodiment of the present disclosure.

Fig. 8 is a schematic view of a manner of meshing a gear and a rack according to an embodiment of the present application.

Fig. 9 is a schematic view of a gear and rack meshing manner according to another embodiment of the present application.

Fig. 10 is a schematic view illustrating a fixing manner of a rack and a sliding door according to an embodiment of the present disclosure.

Fig. 11 is a schematic view illustrating a fixing manner of a rack and a sliding door according to another embodiment of the present disclosure.

Fig. 12 is a schematic view showing a comparison of the rotation speed provided in an embodiment of the present application.

Fig. 13 is a cross-sectional view of a sliding door according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

The present application provides a projector 1, please refer to fig. 1 and fig. 2 together, fig. 1 is a projector provided in a first embodiment of the present application; fig. 2 is a schematic view of another state of the projector of fig. 1. The projector 1 includes: the device comprises a shell 10, a projection device 20, a voice receiving device 30, a processor 40, a memory 50, a driving device 60 and a sliding door 70. The housing 10 has a receiving space, and the projection device 20 is received in the receiving space. The housing 10 has a light-transmitting portion 110, and the projection device 20 is provided corresponding to the light-transmitting portion 110. The sliding door 70 is slidable relative to the housing 10 and has a first position 70a for covering the light-transmitting portion 110 and a second position 70b for exposing the light-transmitting portion 110. The voice receiving device 30 is configured to receive a voice signal and convert the voice signal into an audio electrical signal. The memory 50 stores preset instructions, and the processor 40 receives the audio electrical signal and sends out a driving instruction when the audio electrical signal matches the preset instructions. The driving device 60 receives the driving command and drives the sliding door 70 to slide relative to the housing 10.

First, the operation principle of the projector will be briefly described. In particular, in one possible implementation. The projector 1 further includes a communication module 80, where the communication module 80 is configured to establish communication with a data terminal including but not limited to a mobile terminal, a computer, a cloud, and the like, acquire a picture to be projected, and send the picture to the processor 40. The processor 40 acquires the picture and transmits the picture to the projection device 20, and the projection device 20 projects the picture onto the surface in the projection direction of the projection device 20 to form a projection picture.

Next, the detailed structure, the composition of each component, and the operation principle of the projector 1 proposed in the present application will be described in detail. Specifically, in the present embodiment, as shown in fig. 1, the housing 10 is a hollow cube, but in a possible embodiment, the housing 10 may be a hollow cylinder. In other words, the present application is only an example of the outer shape of the projector 1 shown in fig. 1, and does not limit the outer shape of the projector 1.

Specifically, as shown in fig. 1, the projection device 20 is accommodated in the accommodating space of the housing 10, the housing 10 has the light-transmitting portion 110, the projection device 20 is provided corresponding to the light-transmitting portion 110, and the sliding door 70 is located at the first position 70a where the sliding door covers the light-transmitting portion 110. As shown in fig. 2, the sliding door 70 is located at the second position 70b where the transparent portion 110 is exposed. Both the first position 70a and the second position 70b are extreme positions to which the sliding door can slide, in other words, the sliding door can only slide between the first position 70a and the second position 70 b.

Specifically, the voice receiving device 30 is configured to receive a voice signal and convert the voice signal into an audio electrical signal. The voice signal may be, but is not limited to, a sentence instruction issued by the user during the use of the projector 1, for example, the user speaks: "open", or "open" is included in a statement. The memory 50 stores a preset instruction, for example, the preset instruction is "on", and the processor 40 receives the audio electrical signal. It is understood that the voice signal and the preset instruction may be statements of other contents, which are not limited in this application.

Specifically, in this embodiment, when the audio electrical signal matches the preset instruction, that is, when the "rotation" of the audio signal received by the audio receiving device 30 matches the "rotation" of the preset instruction, the processor 40 issues the driving instruction, and the driving device 60 drives the sliding door 70 to slide from the first position 70a to the second position 70b relative to the housing 10 according to the driving instruction. It is understood that the driving device 60 can also drive the sliding door 70 to slide from the second position 70b to the first position 70a relative to the housing 10 according to the driving command.

It is understood that, in the present embodiment, the sliding direction of the sliding door 70 may be as shown by a dotted double-headed arrow in fig. 2, which is parallel to the surface of the housing 10 on which the light-transmitting portion 110 is located. In another possible embodiment, please refer to fig. 3 together, and fig. 3 is a front view of a projector according to a second embodiment of the present application. The sliding direction of the sliding door 70 of the projector 1 may be as shown by a dotted double-headed arrow in fig. 3, which is parallel to the surface of the housing 10 where the light-transmitting portion 110 is located. The projector 1 provided in fig. 2 differs from the projector 1 provided in fig. 3 in that the projection directions of the projection devices 20 of the two embodiments are perpendicular to each other.

It can be understood that the voice receiving device 30 and the driving device 60 of the projector 1 provided in the present application realize the function of sliding the sliding door 70 of the projector 1 relative to the housing 10 at the first position 70a and the second position 70b through voice signals, and the manner of voice signals is relatively remote-controlled and key-pressed while protecting the projection device 20 of the projector 1, thereby simplifying the operation of the projector 1.

In a possible implementation manner, please refer to fig. 4, and fig. 4 is a schematic diagram of a frame of a voice receiving apparatus according to an embodiment of the present application. The voice receiving device 30 includes a microphone 310 and a voice recognition unit 320, the memory 50 further stores a voice authority sequence 510, the voice authority sequence 510 includes sound information of a plurality of authorities, and when the microphone 310 receives a voice signal, the voice recognition unit 320 recognizes that the voice signal matches with the sound information of the authorities, the audio electric signal is emitted.

Specifically, the sound information of the authorized person may be, but is not limited to, a frequency, a tone, and the like of the sound of the authorized person, and the voice recognition unit 320 matches the sound information of the authorized person in the voice authority sequence 510 according to the voice signal received by the microphone 310, and if the matching is performed, sends the audio signal.

It can be understood that, in this embodiment, the addition of the voice permission sequence 510 greatly improves the security and privacy of the projector 1 in use, and is not easy to be stolen by people other than the authorized person.

In a possible implementation manner, please refer to fig. 5, and fig. 5 is a schematic diagram of a speech permission sequence according to an embodiment of the present application. The sound information of the authorized person in the speech authorization sequence 510 has a priority, the number of the priority is the same as the number of the sound information of the authorized person, the processor 40 is further configured to determine the priority of the sound information of the authorized person according to the audio electrical signal, and the processor 40 generates the driving instruction according to the audio electrical signal with the higher priority. In order to distinguish different sound information of the authority and the corresponding priority, different reference numerals are used in fig. 5 to illustrate, for example, the sound information 511a of the authority and the corresponding priority 512a, the sound information 511b of the authority and the corresponding priority 512b, the sound information 511c of the authority and the corresponding priority 512c, until the sound information 511x of the authority and the corresponding priority 512 x. The sound information 511x of the authority person and the letter x corresponding to the priority 512x are corresponding letters of the number of the sound information of the authority person in the speech authority sequence 510.

Specifically, the priority of the sound information of different authorized persons has a high-low score. The processor 40 generates the driving instruction according to the audio electrical signal with the higher priority when the voice receiving device 30 receives different voice signals at the same time before the projector 1 can execute the next instruction, or when the voice receiving device 30 receives different voice signals at the same time before the next instruction is executed by the projector 1.

Specifically, as shown in fig. 5, the sequence of the sound information of the authorized person in the speech authorization sequence 510 and the priority does not represent the priority, but is indicated by a serial number. The number of the numbers in the speech permission sequence 510 also does not represent the number of the sound information and the priority of the authority in the actual situation, and the speech permission sequence 510 is not limited in the manner shown in fig. 5 in the present application. It is understood that, in the present embodiment, the existence of the priority enables higher stability and performability of the voice operation of the projector 1.

In a possible implementation manner, please refer to fig. 6, and fig. 6 is a schematic diagram of a projector frame according to an embodiment of the present disclosure. The projector 1 further comprises a communication module 80, the communication module 80 is further configured to receive sound information of one or more authorities, the processor 40 is further configured to match the received audio electric signal with the sound information of the authorities, and when the audio electric signal is matched with the sound information of the authorities and the audio electric signal is matched with the preset instruction, the driving instruction is issued.

Specifically, the communication module 80 includes, but is not limited to, a cellular data module, a WIFI module, a bluetooth module, and the like. The communication module 80 establishes communication connection with data terminals such as a mobile terminal and a cloud terminal to acquire sound information of one or more authorized persons. It can be understood that, in the present embodiment, the sound information of the authorized person is obtained through the communication module 80, which saves the storage space required by the memory 50 of the projector 1.

In a possible implementation manner, please refer to fig. 7, and fig. 7 is a schematic diagram of a driving apparatus according to an embodiment of the present disclosure. The driving device 60 includes a motor 610, a gear 620, and a rack 630, the motor 610 and the gear 620 are disposed in the housing 10, the motor 610 is configured to drive the gear 620 to rotate, the rack 630 is engaged with the gear 620, and the rack 630 is fixed to the sliding door 70, when the motor 610 receives the driving instruction, the motor 610 rotates to drive the gear 620 to rotate, so as to drive the rack 630 to slide.

Specifically, the motor 610 rotates according to the driving instruction, and the rotation direction of the motor 610 may be in a clockwise direction or an anticlockwise direction according to the driving instruction. The gear 620 is fixed to a rotation shaft of the motor 610. The rotation shaft rotates, thereby rotating the gear 620.

Specifically, please refer to fig. 8 together, in a possible implementation manner, and fig. 8 is a schematic view of a manner of engaging a gear and a rack according to an implementation manner of the present application. The gear 620 has a rectangular protrusion 621a, and the rack 630 has a rectangular recess 631 a. In this embodiment, the gear 620 is engaged with the rack 630 in such a manner that the rectangular projection 621a is disposed to correspond to the rectangular recess 631 a. In a possible embodiment, please refer to fig. 9 together, and fig. 9 is a schematic view of a gear and rack meshing manner according to another embodiment of the present application. The gear 620 has a semicircular protruding part 621b, the rack 630 has a semicircular recess 631b, and the gear 620 and the rack 630 are engaged in such a manner that the semicircular protruding part 621b and the semicircular recess 631b are correspondingly disposed. It is understood that the convex portion of the gear 620 and the concave portion of the rack 630 may have the same other shapes, and the present application is not limited thereto.

Specifically, when the sliding door 70 is in the first position 70a, the meshing position of the gear 620 and the rack 630 is one end of the rack 630, and when the sliding door 70 is in the second position 70b, the meshing position of the gear 620 and the rack 630 is the other end of the rack 630.

Specifically, please refer to fig. 10 together in a possible implementation manner, and fig. 10 is a schematic view illustrating a fixing manner of a rack and a sliding door according to an implementation manner of the present application. The side of the rack 630 facing away from the gear 620 is coated with at least a part of fixing glue 634, and the rack 630 is adhesively fixed to the sliding door 70 by the fixing glue 634. In a possible embodiment, please refer to fig. 11, in which fig. 11 is a schematic view illustrating a fixing manner of a rack and a sliding door according to another embodiment of the present disclosure. The rack 630 has a through hole 632, the through hole 632 is penetrated by a fixing member 633, one end of the fixing member 633 is located at a side of the rack 630 facing away from the sliding door 70, and the other end of the fixing member 633 is embedded in the sliding door 70. It is understood that the rack 630 and the sliding door 70 have various fixing manners, and the present application is not limited thereto.

It can be understood that, in the present embodiment, the rack 630 in the driving device 60 saves space relative to the way of the sliding slot, so that the volume of the projector 1 can be further reduced. And the rack 630 has a simple mechanical structure, reducing the material cost of the projector 1.

In one possible embodiment, the driving command is a PWM (Pulse width modulation) signal, and the processor 40 adjusts a duty ratio of the PWM signal to adjust the rotation speed of the motor 610.

Specifically, the PWM signal is a pulse signal having periodicity and equal amplitude, and the duty ratio is a ratio of a plurality of continuous pulses generated in a half period of the PWM signal to the half period. The rotation speed of the motor 610 is in a direct proportion to the duty ratio, that is, the processor 40 adjusts the duty ratio to be larger, the rotation speed of the motor 610 is larger, and conversely, the duty ratio is smaller, the rotation speed of the motor 610 is smaller.

It can be understood that, when the power supply voltage of the projector 1 is less than the rated voltage required by the projector 1, the processor 40 may reduce the duty ratio to reduce the rotation speed of the motor 610, thereby reducing the power consumption of the driving device 60 and reducing the influence on the projection device 20.

In a possible embodiment, when the sliding door 70 covers or uncovers the light-transmitting portion 110, the surface area of the housing 10 where the light-transmitting portion 110 is located is larger than the area of the sliding door 70 in the orthographic projection of the surface.

Specifically, when the sliding door 70 is located at the first position 70a, the sliding door 70 is located at the second position 70b, or the sliding door 70 is located between the first position 70a and the second position 70b, the sliding door 70 does not protrude out of the edge of the surface of the housing 10 where the light-transmitting portion 110 is located.

It will be appreciated that, in general, if the sliding door 70 protrudes beyond the edge of the surface, it is likely to hit an obstacle and will take up more space. In the present embodiment, the sliding door 70 is less likely to collide with an obstacle other than the projector 1 itself during the sliding process, so that the stability of the projector 1 in use under different environments is improved, and the space of the projector 1 during use is saved.

Next, some control methods of the projector 1 proposed in the present application will be described in detail. In one possible embodiment, please refer to fig. 12, in which fig. 12 is a schematic view of a comparison of rotation speeds provided in an embodiment of the present application. The memory 50 stores a comparison table 520 of the position of the sliding door 70 relative to the light transmission part 110 and the rotation speed of the motor 610, and when the rotation speed of the motor 610 is smaller than the rotation speed of the corresponding position in the comparison table 520 during the rotation of the motor 610, the processor 40 sends a stop instruction to the driving device 60, wherein the stop instruction is used for controlling the driving device 60 to stop rotating.

Specifically, as shown in fig. 12, the lookup table 520 includes positions M and N, and the dashed double-headed arrow indicates the sliding direction of the sliding door 70. When the sliding door 70 slides from the first position 70a to the second position 70b, the M corresponds to an acceleration ending position of the sliding door 70 from the first position 70a to the M, and the N corresponds to a deceleration starting position of the sliding door 70 from the N to the second position 70 b. Conversely, when the sliding door 70 slides from the second position 70b to the first position 70a, N corresponds to an acceleration ending position of the sliding door 70 from the second position 70b to N, and M corresponds to a deceleration starting position of the sliding door 70 from M to the first position 70 a. When the sliding door 70 is between M and N, the motor 610 rotates at a constant speed. If the rotation speed of the motor 610 is lower than that of the corresponding position in the look-up table 520 due to some special conditions, for example, due to a failure of the motor 610, or the sliding door 70 cannot slide continuously when encountering a foreign object during sliding, the processor 40 sends a stop instruction to the driving device 60, where the stop instruction is used to control the driving device 60 to stop rotating.

In one possible embodiment, the memory 50 stores a comparison table 520 of the position of the sliding door 70 relative to the light transmission part 110 and the rotation speed of the motor 610, the sliding door 70 is provided with a speed detection module 90, the speed detection module 90 is used for detecting the sliding speed of the sliding door 70, and when the sliding speed of the sliding door 70 is smaller than the rotation speed of the corresponding position in the comparison table 520 during the sliding process, the processor 40 sends a stop instruction to the driving device 60, and the stop instruction is used for controlling the driving device 60 to stop rotating.

Specifically, in this embodiment, please refer to fig. 13 together, and fig. 13 is a cross-sectional view of the sliding door according to an embodiment of the present application. The speed detection module 90 is integrated inside the sliding door 70 and electrically connected to the processor 40 to save space. It will be appreciated that the speed detection module 90 may also be integrated into the surface of the sliding door 70. The function and structure of the comparison table 520 are the same as those of the comparison table 520 in the previous embodiment, and are not described herein again. According to the sliding speed detected by the speed detection module 90, when the sliding speed of the sliding door 70 is smaller than the rotation speed of the corresponding position in the comparison table 520 during the sliding process, the processor 40 sends a stop instruction to the driving device 60, where the stop instruction is used to control the driving device 60 to stop rotating.

It can be understood that, in the present embodiment, the presence of the comparison table 520 makes the control of the projector 1 more stable for the user, and at the same time, prevents some special situations from accidentally damaging the projector 1, and increases the service life of the projector 1.

In a possible embodiment, the sliding door 70 does not cover the light-transmitting portion 110, and when the projector 1 normally operates, within a preset time, if the processor 40 does not receive any new instruction, the processor 40 sends the driving instruction to the driving device 60, so that the sliding door 70 slides to cover the light-transmitting portion 110, and controls the projector 1 to stop operating, and enter a sleep state.

Specifically, the preset time may be, but is not limited to, 10 minutes or 20 minutes. In the present embodiment, the preset time is 20 minutes. When the sliding door 70 does not cover the light-transmitting portion 110, in other words, when the projection device 20 of the projector 1 is in the operating state, the processor 40 starts timing when receiving a previous arbitrary instruction, and after receiving no new instruction after exceeding 20 minutes, the processor 40 sends the driving instruction to the driving device 60, so that the sliding door 70 slides to cover the light-transmitting portion 110, that is, the sliding door 70 is located at the first position 70a, and controls the projector 1 to stop operating, and enter the sleep state.

It is understood that, in the present embodiment, exceeding the preset time may mean that the user is not using the projector 1. In order to save resources and prolong the service life of the projector 1, the processor 40 drives the sliding door 70 to slide to the first position 70a, and stops the projector 1 to enter a sleep state.

The principle and the implementation of the present application are explained herein by applying specific examples, and the above description of the embodiments is only used to help understand the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. A projector, characterized in that the projector comprises: casing, projection arrangement, pronunciation receiving arrangement, treater, memory, drive arrangement and sliding door, the casing has accommodating space, projection arrangement accept in the accommodating space, the printing opacity portion has on the casing, projection arrangement corresponds printing opacity portion sets up, the sliding door can be relative the casing slides and has and cover the first position of printing opacity portion and show the second position of printing opacity portion, pronunciation receiving arrangement is used for receiving voice signal, and will voice signal converts the audio signal into the audio signal, the memory storage has and predetermines the instruction, the treater is received the audio signal, and when the audio signal with predetermine the instruction and match, send drive instruction, drive arrangement receives drive instruction, and the drive the sliding door is relative the casing slides.

2. The projector according to claim 1, wherein the voice receiving means includes a microphone, and a voice recognition unit, the memory further stores a voice authority sequence including voice information of a plurality of authorities, and the voice recognition unit, when the microphone receives a voice signal, recognizes that the voice signal matches the voice information of the authorities, emits the audio electric signal.

3. The projector according to claim 2, wherein the sound information of the authority person in the speech authority sequence has a priority, the number of the priorities is the same as the number of the sound information of the authority person, the processor is further configured to determine the priority of the sound information of the authority person according to the audio electric signal, and the processor generates the driving instruction according to the audio electric signal with the high priority.

4. The projector as claimed in claim 1, wherein the projector further comprises a communication module for receiving sound information of one or more authorized persons, and the processor is further configured to match the received audio electrical signal with the sound information of the authorized persons, and to issue the driving instruction when the audio electrical signal matches with the sound information of the authorized persons and the audio electrical signal matches with the preset instruction.

5. The projector as claimed in claim 1, wherein the driving device includes a motor, a gear, and a rack, the motor and the gear are disposed in the housing, the motor is configured to drive the gear to rotate, the rack is engaged with the gear, and the rack is fixed to the sliding door.

6. The projector as defined in claim 5 wherein the drive command is a PWM signal and the processor adjusts a duty cycle of the PWM signal to adjust a rotational speed of the motor.

7. The projector as claimed in claim 1, wherein when the shutter covers or uncovers the light-transmitting portion, a surface area of the housing in which the light-transmitting portion is located is larger than an area of the shutter in an orthographic projection on the surface.

8. The projector as claimed in claim 1, wherein the memory stores a comparison table of the position of the sliding door relative to the light-transmitting portion and the rotation speed of the motor, and the processor issues a stop command to the driving device when the rotation speed of the motor is less than the rotation speed of the corresponding position in the comparison table during the rotation of the motor, and the stop command is used for controlling the driving device to stop rotating.

9. The projector as claimed in claim 1, wherein the memory stores a comparison table of the position of the sliding door relative to the light-transmitting portion and the rotation speed of the motor, the sliding door has a speed detection module thereon, the speed detection module is configured to detect a sliding speed of the sliding door, and the processor issues a stop command to the driving device when the sliding speed of the sliding door is less than the rotation speed of the corresponding position in the comparison table during sliding, and the stop command is used to control the driving device to stop rotating.

10. The projector as claimed in claim 1, wherein the sliding door does not cover the light-transmitting portion, and when the projector normally operates, if the processor does not receive any new command within a predetermined time, the processor sends the driving command to the driving device, so that the sliding door slides to cover the light-transmitting portion, and controls the projector to stop operating, and enter a sleep state.

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