CN114545711A

CN114545711A - Startup control method and shutdown control method of projection equipment

Info

Publication number: CN114545711A
Application number: CN202011359741.0A
Authority: CN
Inventors: 陈许; 李征
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2022-05-27

Abstract

The embodiment of the application discloses a startup control method and a shutdown control method of projection equipment, and belongs to the technical field of projection. The method comprises the following steps: the controller controls the power supply module to be respectively communicated with the projection display module and the screen lifting module and then sends a first control instruction to the screen lifting module; when the projection screen is determined to be lifted to a first preset height based on the first control instruction, sending a second control instruction to the screen lifting module; then the controller outputs a startup picture to the projection display module according to the pre-stored ascending curve segment, sends a third control instruction to the projection display module and simultaneously sends a fourth control instruction to the screen lifting module; and when the controller determines that the projection screen is lifted to a second preset height, sending a second control instruction to the screen lifting module. In the embodiment of the application, the controller can simultaneously control the projection display module and the screen lifting module, so that the synchronism of the startup picture and the lifting of the projection screen is ensured, and the display effect of the projection equipment is improved.

Description

Startup control method and shutdown control method of projection equipment

Technical Field

The embodiment of the application relates to the technical field of projection, in particular to a startup control method and a shutdown control method of projection equipment.

Background

With the continuous development of science and technology, projection equipment is more and more applied to the work and the life of people. Currently, a projection device mainly includes an optical engine and a projection screen. The light outlet of the optical engine faces the projection screen to emit light beams to the projection screen, and the projection screen is used for receiving the light beams to realize the display of pictures.

Disclosure of Invention

The embodiment of the application provides a startup control method and a shutdown control method for a projection device, which can ensure the synchronism of the startup picture and the rise of a projection screen in the use process of the projection device. The technical scheme is as follows:

a startup control method of a projection device, wherein the projection device comprises a controller, a power supply module, a projection display module, a screen lifting module, an optical engine and a projection screen, and the method is applied to the controller and comprises the following steps:

when the controller receives a starting-up instruction, the power supply module is controlled to be respectively communicated with the projection display module and the screen lifting module;

the controller sends a first control instruction to the screen lifting module, and the first control instruction is used for indicating the screen lifting module to control the projection screen to lift;

when the controller determines that the projection screen is lifted to a first preset height, a second control instruction is sent to the screen lifting module, and the second control instruction is used for indicating the screen lifting module to control the projection screen to stop lifting;

the controller outputs a starting-up picture to the projection display module according to a pre-stored rising curve segment, sends a third control instruction to the projection display module and simultaneously sends a fourth control instruction to the screen lifting module;

the third control instruction is used for instructing the projection display module to control the optical engine to emit a light beam based on the startup picture and first light beam information stored in advance, and the fourth control instruction is used for instructing the screen lifting module to control the projection screen to continuously lift according to the pre-stored lifting curve segment;

and when the controller determines that the projection screen is lifted to a second preset height, sending a second control instruction to the screen lifting module.

Optionally, the projection device further includes a first trigger switch, and the controller determines that the projection screen is lifted to a first preset height, including:

when the controller receives a first trigger signal sent by the screen lifting module, the controller determines that the projection screen is lifted to the first preset height;

the first trigger signal is triggered when the projection screen rises to the first preset height and is sent to the screen lifting module.

Optionally, the projection screen includes a lifting motor, the projection apparatus further includes an encoder, and the controller determines that the projection screen is lifted to a first preset height, including:

the controller receives a first lifting height of the projection screen transmitted by the screen lifting module, wherein the first lifting height is determined by the screen lifting module based on a first rotation angle of the lifting motor detected by the encoder;

when the first rising height is equal to the first preset height, the controller determines that the projection screen rises to the first preset height.

Optionally, after the controller sends the fourth control instruction to the screen lifting module, the method further includes:

the controller receives a second lifting height of the projection screen transmitted by the screen lifting module, wherein the second lifting height is determined by the screen lifting module based on a second rotation angle of the lifting motor detected by the encoder;

the controller determines a third rising height of the startup picture according to the rising curve segment;

when the difference between the second rising height and the third rising height is larger than the difference threshold, the controller adjusts the rising speed of the startup picture, outputs the startup picture to the projection display module according to the adjusted rising speed, and then returns to the controller to receive the second rising height of the projection screen transmitted by the screen lifting module;

and when the difference between the second rising height and the third rising height is smaller than or equal to a difference threshold value, the controller continues to output the startup picture to the projection display module according to the rising curve segment.

Optionally, the projection device further includes a storage portion, a flip transmission mechanism, a slider transmission mechanism, a second trigger switch, and a third trigger switch, and before the controller sends the first control instruction to the screen lifting module, the projection device further includes:

the controller sends a fifth control instruction to the screen lifting module so that the controller receives a second trigger signal sent by the screen lifting module;

the controller sends a sixth control instruction to the projection display module, so that the controller receives a third trigger signal sent by the projection display module;

the fifth control instruction is used for indicating the screen lifting module to control the turnover driving mechanism to turn over, the second trigger signal is sent by the screen lifting module when the turnover driving mechanism avoids the lifting port of the containing part, the sixth control instruction is used for indicating the projection display module to control the sliding cover driving mechanism to slide, and the third trigger signal is sent by the projection display module when the sliding cover driving mechanism avoids the light-transmitting area of the containing part.

Optionally, the projection apparatus further includes an eye protection detection unit, and after the controller sends the third control instruction to the projection display module, the projection apparatus further includes:

the controller receives a first detection distance sent by the projection display module, and the first detection distance is detected by the eye protection detection unit and sent to the projection display module;

when the first detection distance is smaller than a first distance threshold, the controller sends a seventh control instruction to the projection display module, and continues to receive the first detection distance sent by the projection display module until the first distance is larger than or equal to the first distance threshold, and the controller sends the third control instruction to the projection display module again;

the seventh control instruction is used for instructing the projection display module to control the optical engine to emit a light beam based on the startup picture and second light beam information stored in advance.

Optionally, the projection device further includes a sound, and after the controller receives the first detection distance sent by the projection display module, the projection device further includes:

when the first detection distance is smaller than a first distance threshold, the controller sends a voice prompt message to the sound box and continues to receive the first detection distance sent by the projection display module until the first distance is larger than or equal to the first distance threshold.

A shutdown control method of a projection device, wherein the projection device comprises a controller, a power supply module, a projection display module, a screen lifting module, an optical engine and a projection screen, and the method is applied to the controller and comprises the following steps:

when the controller receives a shutdown instruction, outputting a shutdown picture to the projection display module according to a prestored descending curve segment, sending an eighth control instruction to the projection display module, and sending a ninth control instruction to the screen lifting module;

the eighth control instruction is used for instructing the projection display module to control the optical engine to emit a light beam based on the shutdown picture and a first pre-stored light beam information, and the ninth control instruction is used for instructing the screen lifting module to control the projection screen to descend to a first preset height according to a pre-stored descending curve segment;

when the controller determines that the projection screen descends to the first preset height, a tenth control instruction is sent to the projection display module, and meanwhile, an eleventh control instruction is sent to the screen lifting module, the tenth control instruction is used for instructing the projection display module to control the optical engine to stop emitting light beams, and the eleventh control instruction is used for instructing the screen lifting module to control the projection screen to continuously descend;

when the controller determines that the projection screen descends to a third preset height, a twelfth control instruction is sent to the screen lifting module, and the twelfth control instruction is used for instructing the screen lifting module to control the projection screen to stop descending;

the controller controls the power supply module to be disconnected with the projection display module and the screen lifting module respectively.

Optionally, the projection device further includes a first trigger switch, and the controller determines that the projection screen is lowered to the first preset height, including:

when the controller receives a first trigger signal sent by the screen lifting module, the controller determines that the projection screen is lowered to a first preset height;

the first trigger signal is triggered when the projection screen descends to the first preset height and is sent to the screen lifting module.

Optionally, the projection screen includes a lifting motor, the projection apparatus further includes an encoder, and the controller determines that the projection screen falls to the first preset height, including:

the controller receives a first descending height of the projection screen transmitted by the screen lifting module, wherein the first descending height is determined by the screen lifting module based on a third rotating angle of the lifting motor detected by the encoder;

when the difference between the second preset height and the first descending height is equal to the first preset height, the controller determines that the projection screen descends to the first preset height.

Optionally, after the controller sends a ninth control instruction to the screen lifting module, the method further includes:

the controller receives a second descending height of the projection screen transmitted by the screen lifting module, wherein the second descending height is determined by the screen lifting module based on a fourth rotation angle of the lifting motor detected by the encoder;

the controller determines a third descending height of the shutdown picture according to the descending curve segment;

when the difference between the second descending height and the third descending height is larger than the difference threshold, the controller adjusts the descending speed of the shutdown picture, outputs the shutdown picture to the projection display module according to the adjusted descending speed, and then returns to the step that the controller receives the second descending height of the projection screen transmitted by the screen lifting module;

and when the difference between the second descending height and the third descending height is smaller than or equal to a difference threshold value, the controller continues to output the shutdown picture to the projection display module according to the descending curve segment.

Optionally, the projection device further includes a storage portion, a flip transmission mechanism, a slider transmission mechanism, a fourth trigger switch, and a fifth trigger switch, and after the controller sends a twelfth control instruction to the screen lifting module, the method includes:

the controller sends a thirteenth control instruction to the screen lifting module so that the controller receives a fourth trigger signal sent by the screen lifting module;

the controller sends a fourteenth control instruction to the projection display module, so that the controller receives a fifth trigger signal sent by the projection display module;

the thirteenth control instruction is used for indicating the screen lifting module to control the flip transmission mechanism to turn over, the fourth trigger signal is sent by the screen lifting module when the flip transmission mechanism shields the lifting port of the receiving part, the fourteenth control instruction is used for indicating the projection display module to control the sliding cover transmission mechanism to slide, and the fifth trigger signal is sent by the projection display module when the sliding cover transmission mechanism shields the light-transmitting area of the receiving part.

The technical scheme provided by the embodiment of the application has the beneficial effects that at least:

in the embodiment of the application, when the controller receives a starting instruction, the projection display module and the screen lifting module are powered firstly, then after the projection display module and the screen lifting module are ready, the projection screen is controlled to be lifted to a first preset height firstly, and then the starting picture and the projection screen are controlled to be lifted synchronously based on the lifting curve segment until the projection screen is lifted to a second preset height, so that the display effect of the picture on the projection screen is ensured, and the reliability of the projection equipment in use is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic system structure diagram of a projection apparatus provided in an embodiment of the present application;

FIG. 2 is a schematic system diagram of another projection apparatus provided in an embodiment of the present application;

fig. 3 is a schematic state diagram of a receiving portion according to an embodiment of the present disclosure;

fig. 4 is a schematic state diagram of another accommodating portion provided in the embodiment of the present application;

fig. 5 is a flowchart illustrating a method for controlling a start-up of a projection apparatus according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a rising curve segment provided by an embodiment of the present application;

fig. 7 is a flowchart illustrating a shutdown control method for a projection apparatus according to an embodiment of the present disclosure;

fig. 8 is a schematic diagram of a descending curve segment provided in an embodiment of the present application.

Reference numerals:

01: a controller; 02: a power supply module; 03: a projection display module; 04: a screen lifting module; 05: an optical engine; 06: a projection screen; 07: a first trigger switch; 08: an encoder; 09: a storage section; 10: a flip cover transmission mechanism; 11: a sliding cover transmission mechanism; 12: a second trigger switch; 13: a third trigger switch; 14: a fourth trigger switch; 15: a fifth trigger switch;

011: an audio and video processing and control module; 012: a storage module;

031: a display control unit; 032: a display driving unit; 033: a storage unit; 034: a light source driving unit; 035: a slide cover driving unit;

041: a screen control unit; 042: a lifting drive unit; 043: a flip cover driving unit.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Before explaining the power-on control method and the power-off control method in the examples of the embodiments of the present application in detail, a system structure diagram of a projection device and an entity structure diagram of the projection device are explained first.

Fig. 1 illustrates a system configuration diagram of a projection apparatus according to an embodiment of the present application. As shown in fig. 1, the projection apparatus includes a controller 01, a power module 02, a projection display module 03, a screen lifting module 04, an optical engine 05, and a projection screen 06.

The controller 01 is respectively and electrically connected with the power module 02, the projection display module 03 and the screen lifting module 04, and the power module 02 is also respectively and electrically connected with the projection display module 03 and the screen lifting module 04; the projection display module 03 and the optical engine 05 are electrically connected, and the screen lifting module 04 is electrically connected with the projection screen 06. The controller 01 is used for controlling the power supply module 02 and the power-on states of the projection display module 03 and the screen lifting module 04, and in addition, the controller 01 is also used for transmitting video data to the projection display module 03, realizing that the optical engine 05 emits light beams or closes the light beams based on the video data by controlling the projection display module 03, realizing that the projection screen 06 is lifted by controlling the screen lifting module 04, and receiving the light beams to display the video data when the projection screen 06 is unfolded.

As shown in fig. 2, the controller 01 includes an audio/video processing and control module 011 and a storage module 012, the audio/video processing module is electrically connected to the storage module 012, and the audio/video processing and control module 011 is also electrically connected to the projection display module 03 and the screen lifting module 04, respectively.

The storage module 012 stores audio and video data, and the audio and video processing and control module 011 can decode the audio and video data, transmit the decoded video data to the projection display module 03, and transmit the decoded audio data to the speaker unit. In addition, the audio/video processing and control module 011 can send control instructions to the projection display module 03 and the screen lifting module 04 and receive data information fed back by the projection display module 03 and the screen lifting module 04.

The speaker unit may be a structure included in the projection device itself, that is, the projection device further includes the speaker unit, or may be an external mechanism of the projection device. Optionally, the speaker unit is an audio.

As shown in fig. 2, the projection display module 03 includes a display control unit 031, a display driving unit 032, a storage unit 033 and a light source driving unit 034, the display control unit 031 is electrically connected to the controller 01, the display driving unit 032 and the light source driving unit 034, the display driving unit 032 is also electrically connected to the controller 01, the storage unit 033 and the light source driving power supply, and the light source driving unit 034 is electrically connected to the optical engine 05.

The display control unit 031 is configured to receive the control instruction sent by the controller 01, and control the display drive unit 032 and the light source drive unit 034 based on the control instruction, where the display drive unit 032 is configured to receive the video data transmitted by the controller 01, and acquire the light beam information from the storage unit 033, and then is further configured to transmit the received video data and the light beam information to the light source drive unit 034, and the light source drive unit 034 is configured to drive the optical engine 05 to emit a light beam based on the video data and the light beam information under the control of the display control unit 031. Wherein the beam information comprises brightness values and gray-scale values of the tricolor beams.

As shown in fig. 2, the screen lifting module 04 includes a screen control unit 041 and a lifting driving unit 042, the screen control unit 041 is electrically connected to the controller 01 and the lifting driving unit 042, the screen control unit 041 is configured to receive a control command sent by the controller 01, and control the lifting driving unit 042 based on the control command, and the lifting driving unit 042 can control the projection screen 06 to lift under the control of the screen control unit 041.

In the lifting process of the projection screen 06, when the projection screen 06 is lifted up or lowered down to a first preset height, the projection screen 06 is at a critical height between the light beam emitted from the optical engine 05 and the light beam not emitted from the optical engine 05, that is, when the projection screen 06 is continuously lifted up on the basis of the first preset height, the light beam emitted from the optical engine 05 can be received, when the projection screen 06 is continuously lowered down on the basis of the first preset height, the light beam emitted from the optical engine 05 cannot be received, when the projection screen 06 is lifted up to a second preset height, the light beam emitted from the optical engine 05 can be received, and a complete display picture is displayed, at this time, the projection screen 06 is in a spreading state; when the projection screen 06 descends to the third preset height, the light beam emitted from the optical engine 05 cannot be received at all, and the projection screen 06 is in the retracted state.

In the embodiment of the application, the projection screen 06 comprises a base, a curling transmission mechanism, a lifting transmission mechanism and a screen sheet, wherein the curling transmission mechanism is limited on the base, the lifting transmission mechanism is fixed on the base, two opposite side edges on the screen sheet are respectively fixedly connected with the curling transmission mechanism and the lifting transmission mechanism, and the curling transmission mechanism and the lifting transmission mechanism can be matched to realize the folding or unfolding of the screen sheet.

With the above description, when the projection screen 06 is raised or lowered to the first preset height, the screen is at the critical height between the light beam emitted from the optical engine 05 and the light beam not emitted from the optical engine 05, and when the projection screen 06 is continuously raised to the second preset height, the screen is in the unfolded state; when the projection screen 06 descends to the third predetermined height, the screen is in a retracted state.

Wherein, the lifting transmission mechanism is electrodynamic type lifting mechanism, also is that lifting transmission mechanism includes elevator motor and crane, and elevator motor is connected with screen lift module 04 electricity, and elevator motor still is connected with the crane transmission. The curling transmission mechanism is an energy storage type curling mechanism or an electric curling mechanism, and when the curling transmission mechanism is the electric curling mechanism, the curling transmission mechanism comprises a curling motor and a winding drum, the curling motor is electrically connected with the screen lifting module 04, and the curling motor is in transmission connection with the winding drum. At this time, the controller 01 is used for controlling the start and stop of the lifting motor and the curling motor through the screen lifting module 04 to realize the expansion or the retraction of the curtain sheet.

Wherein, elevator motor and curling motor all have the function of outage band-type brake, also be the state that elevator motor and coiling motor can be in the stop after the outage to guarantee that the curtain piece can not descend naturally, promote projection apparatus's reliability.

Optionally, as shown in fig. 1, the projection apparatus further includes a first trigger switch 07, the first trigger switch 07 is electrically connected to the screen lifting module 04, and the first trigger switch 07 is capable of triggering generation of a first trigger signal when the projection screen 06 is raised to a first preset height or lowered to the first preset height, and transmitting the first trigger signal to the screen lifting module 04.

Optionally, as shown in fig. 1, the projection apparatus further includes an encoder 08, the encoder 08 is electrically connected to the screen lifting module 04, the encoder 08 is installed on the lifting motor, and the encoder 08 is configured to detect a rotation angle and an angular velocity of the lifting motor and transmit the detected rotation angle and angular velocity to the screen lifting module 04.

At this time, the screen lifting module 04 can determine a lifting height or a lowering height of the projection screen 06 according to the detected rotation angle, and can determine a lifting speed or a lowering speed of the projection screen 06 according to the detected angular velocity.

The screen lifting module 04 can determine the lifting speed or the lowering speed of the projection screen 06 according to the detected angular speed and the transmission ratio between the lifting motor and the lifting frame, and can determine the lifting height or the lowering height according to the detected rotation angle and the transmission ratio between the lifting motor and the lifting frame; of course, the rising speed or the falling speed, and the rising height or the falling height of the projection screen 06 can also be determined in other ways according to the detected angular speed or the detected rotation angle, and reference may be made to related technologies, which is not limited in this embodiment of the present application.

For example, in the embodiment of the present application, the rising height or the falling height of the projection screen may be determined according to the following formula.

H＝16.6×θ+481

Wherein, H is a rising height or a falling height of the projection screen, and θ is a rotation angle of the lifting motor.

In the embodiment of the present application, the projection apparatus includes a receiving portion 09, and the receiving portion 09 has a first receiving portion and a second receiving portion, and a light-transmitting region communicated with the first receiving portion and a lifting port communicated with the second receiving portion. Fig. 3 and 4 illustrate schematic diagrams of different states of one of the receiving portions 09 in the embodiment of the present application.

The controller 01, the power module 02, the projection display module 03, the screen lifting module 04 and the optical engine 05 are all located in the first accommodating part, the projection screen 06 is fixed in the second accommodating part, a light beam emitted by the optical engine 05 can penetrate through the light-transmitting area, and the projection screen 06 can lift through the lifting port. In addition, the first trigger switch 07 is installed above the ascending and descending opening of the accommodating portion 09, and the height of the first trigger switch 07 is equal to a first preset height.

Optionally, as shown in fig. 1, the projection device further includes a flip cover actuator 10, a slide cover actuator 11, a second trigger switch 12, a third trigger switch 13, a fourth trigger switch 14, and a fifth trigger switch 15.

Correspondingly, as shown in fig. 2, the screen lifting module 04 further includes a flip driving unit 043, the projection display module 03 further includes a sliding cover driving unit 035, the flip driving unit 043 is electrically connected to the screen control unit 041, and the sliding cover driving unit 035 is electrically connected to the display control unit 031. As shown in fig. 3 or fig. 4, the flip transmission mechanism 10 is installed in the second accommodating portion and located at the lifting opening, and the slide transmission mechanism 11 is installed in the first accommodating portion and located at the light-transmitting area.

The flip cover driving unit 043 can control the flip cover transmission mechanism 10 to flip under the control of the screen control unit 041 so as to switch between shielding the lifting opening and avoiding the lifting opening; the sliding cover driving unit 035 can control the sliding cover transmission mechanism 11 to slide under the control of the display control unit 031 to switch between blocking the light transmission region and avoiding the light transmission region.

Wherein, second trigger switch 12 and fourth trigger switch 14 all are connected with screen lift module 04 electricity, and second trigger switch 12 can trigger when flip drive mechanism 10 overturns to avoiding the lift mouth and generate second trigger signal to transmit to screen lift module 04, and fourth trigger switch 14 can trigger when flip drive mechanism 10 overturns to sheltering from the lift mouth and generate fourth trigger signal, and transmit to screen lift module 04. The third trigger switch 13 and the fifth trigger switch 15 are electrically connected to the projection display module 03, the third trigger switch 13 can trigger generation of a third trigger signal when the sliding cover transmission mechanism 11 is turned over to avoid the light-transmitting area, and the third trigger signal is transmitted to the projection display module 03, and the fifth trigger switch 15 can trigger generation of a fifth trigger signal when the sliding cover transmission mechanism 11 is turned over to shield the light-transmitting area, and the fifth trigger signal is transmitted to the projection display module 03.

Optionally, the projection device further includes an eye protection detection unit, the eye protection detection unit is electrically connected to the projection display module 03, and the eye protection detection unit is configured to detect whether a user approaches the projection display module 03, and transmit a detection distance between the user and the eye protection detection unit to the projection display module 03.

In combination with the above description of the projection display module 03, the eye protection detection unit is electrically connected to the display control unit 031. The eye protection detection unit comprises a pyroelectric sensor or a millimeter wave radar sensor and the like.

Optionally, the projection apparatus further includes an obstacle detection unit, the obstacle detection unit is electrically connected to the screen lifting module 04, and the obstacle detection unit is configured to detect whether an obstacle exists above the projection screen 06, detect whether an obstacle is close to the projection screen 06, and transmit a detected obstacle signal or a detected distance to the screen lifting module 04.

In combination with the above description of the screen lifting module 04, the obstacle detecting unit is electrically connected to the screen control unit 041. The obstacle detection unit includes an infrared sensor, a radar sensor, and the like.

Next, a power-on control method of the projection apparatus according to an example of the embodiment of the present application will be explained.

Fig. 5 illustrates a flowchart of a power-on control method of a projection apparatus according to an embodiment of the present application. The method is applied to the controller included in the projection apparatus described in the above embodiments. As shown in fig. 5, the method includes the following steps.

Step 501: when the controller receives a starting-up instruction, the power supply module is controlled to be respectively communicated with the projection display module and the screen lifting module.

The projection equipment is provided with a starting button, the starting button is electrically connected with the controller, and at the moment, a user can press the starting button to trigger a starting instruction and transmit the starting instruction to the controller; or the projection equipment comprises a remote controller, the remote controller is electrically connected with the controller, and at the moment, a user can press a starting button on the remote controller to trigger a starting instruction and transmit the starting instruction to the controller.

When the controller receives a start-up instruction, indicating that the user wants to watch the projection device, the controller controls the power supply module to respectively supply power to the projection display module and the screen lifting module, so as to realize the start of the optical engine and the projection screen through the following steps 502-507.

In the embodiment of the application, before the start of the optical engine and the projection screen is realized, the projection display module and the screen lifting module can also perform self-checking, and a self-checking signal is fed back to the controller. At the moment, the controller can respectively determine the current states of the projection display module and the screen lifting module according to the self-checking signals of the projection display module and the screen lifting module so as to ensure that the projection display module and the screen lifting module are both in the ready state.

In the embodiment of the present application, under the condition that the projection apparatus includes the flip transmission mechanism, the flip transmission mechanism may be in a state of shielding the lifting opening of the receiving portion, so as to ensure normal lifting of the projection screen, the flip transmission mechanism may be controlled to be turned over to a state of avoiding the lifting opening of the receiving portion through the following step 502.

Step 502: and the controller sends a fifth control instruction to the screen lifting module so that the controller receives a second trigger signal sent by the screen lifting module.

The fifth control instruction is used for indicating the screen lifting module to control the turnover of the turnover cover transmission mechanism, and the second trigger signal is sent to the screen lifting module when the turnover cover transmission mechanism avoids the lifting port of the accommodating part. That is, the second trigger signal can indicate that the flip cover transmission mechanism is in a state of avoiding the lifting port of the accommodating part.

And combining the introduction of the screen lifting module, at the moment, the controller sends a fifth control instruction to the screen control unit, and then the screen control unit sends a driving signal to the flip driving unit based on the fifth control instruction so as to drive the flip transmission mechanism to turn until the flip transmission mechanism avoids the lifting opening of the accommodating part.

Step 503: the controller sends a first control instruction to the screen lifting module, and the first control instruction is used for indicating the screen lifting module to control the projection screen to lift.

By combining the introduction of the screen lifting module and the projection screen, the screen control unit is controlled to send a first control instruction, and then the screen control unit sends a driving signal to the projection screen based on the first control instruction so as to drive the lifting motor and the curling motor to start, so that the projection screen is lifted.

When the screen lifting module controls the projection screen to lift based on the first control instruction, the optical engine does not emit light beams before the projection screen is lifted to the first preset height, so that no display picture appears on the projection screen in the process, the display effect is not affected, the speed for controlling the projection screen to lift based on the first control instruction can be any speed, and the embodiment of the application is not limited.

Further, in the case that the projection apparatus includes the obstacle detection unit, in order to avoid an obstacle encountered when the projection screen is lifted, before controlling the projection screen to be lifted, that is, before the controller sends the first control instruction to the screen lifting module, whether an obstacle exists above the projection screen may be detected as follows.

The controller receives an obstacle detection signal sent by the screen lifting module, and the obstacle detection signal is detected by the obstacle detection unit and sent to the screen lifting module; and if the controller determines that the lifting port of the accommodating part has the obstacle based on the obstacle signal, continuously receiving the obstacle detection signal sent by the screen lifting module until the controller determines that the lifting port of the accommodating part has no obstacle based on the obstacle signal.

Step 504: and when the controller determines that the projection screen rises to the first preset height, sending a second control instruction to the screen lifting module, wherein the second control instruction is used for indicating the screen lifting module to control the projection screen to stop rising.

The controller may determine that the projection screen is raised to the first preset height as follows.

In some embodiments, in the case that the projection device includes the first trigger switch, when the controller receives a first trigger signal sent by the screen lifting module, the controller determines that the projection screen is lifted to a first preset height;

the first trigger signal is triggered when the projection screen rises to a first preset height and is sent to the screen lifting module.

In other embodiments, in the case that the projection screen includes a lifting motor and the projection apparatus includes an encoder, the controller receives a first lifting height of the projection screen transmitted by the screen lifting module, and when the first lifting height is equal to a first preset height, the controller determines that the projection screen is lifted to the first preset height.

Wherein the first elevation height is determined by the screen elevation module based on a first rotation angle of the elevation motor detected by the encoder.

Of course, in the embodiment of the present application, in addition to determining that the projection screen is lifted to the first preset height through the two manners, the projection screen can also be determined to be lifted to the first preset height through other manners. Illustratively, when the controller receives the confirmation instruction, the projection screen is determined to be lifted to a first preset height. The confirmation instruction is triggered by a user when the projection screen is lifted to a first preset height.

After the projection screen is determined to be lifted to the first preset height, the projection display module may not be ready, and at this time, in order to ensure that the projection screen and the startup picture are lifted synchronously, the projection screen may be controlled to stop lifting through the second control instruction.

It should be noted that, if the controller determines that the screen lifting module is in the ready state, the above steps 502 to 504 may be directly performed, and there is no need to wait for the controller to determine that the projection display module is in the ready state.

In the embodiment of the present application, in a case that the projection apparatus includes the sliding cover transmission mechanism, the sliding cover transmission mechanism may be in a state of shielding the light-transmitting area of the receiving portion, and therefore, in order to ensure normal light emission of the optical engine, the sliding cover transmission mechanism may be controlled to slide to a state of avoiding the light-transmitting area of the receiving portion in the following step 505.

Step 505: and the controller sends a sixth control instruction to the projection display module so that the controller receives a third trigger signal sent by the projection display module.

The sixth control instruction is used for indicating the projection display module to control the sliding cover transmission mechanism to slide, and the third trigger signal is sent to the projection display module when the sliding cover transmission mechanism is triggered when avoiding the light-transmitting area of the accommodating part. That is, the third trigger signal can indicate that the slide cover transmission mechanism is in a state of avoiding the light-transmitting area of the accommodating part.

In combination with the introduction of the projection display module, at this time, the controller sends a sixth control instruction to the display control unit, and then the display control unit sends a driving signal to the sliding cover driving unit based on the sixth control instruction so as to drive the sliding cover transmission mechanism to slide until the sliding cover transmission mechanism avoids the light-transmitting area of the accommodating part.

It should be noted that, if the controller determines that the projection display module is in the ready state, the step 505 may be directly executed, and it is not necessary to wait for the controller to determine that the screen lifting module is in the ready state.

Therefore, there is no precedence relationship between the step 505 and the steps 502 to 504, that is, the step 505 may be executed before the step 502, or after the step 504, or may be executed during the execution of the steps 502 to 504, which is not limited in this embodiment of the application.

It should be noted that, in order to avoid that the time for stopping the projection screen is long after the step 504 is executed, so as to avoid the user considering that the projection device is in a failure, the control of the lifting speed of the projection screen based on the first control instruction may be determined according to the first preset height, the self-checking time of the projection display module, and the time for controlling the sliding cover transmission mechanism to be in the position of avoiding the transparent area.

In the embodiment of the present application, after the projection screen is ensured to be lifted to the first predetermined height through the above steps 502 to 505, and the sliding cover transmission mechanism is in the state of avoiding the light-transmitting area, the projection screen and the startup picture can be ensured to be lifted synchronously through the following step 506, so as to ensure a better display effect.

Step 506: and the controller outputs a startup picture to the projection display module according to the pre-stored ascending curve segment, sends a third control instruction to the projection display module and simultaneously sends a fourth control instruction to the screen lifting module.

The third control instruction is used for instructing the projection display module to control the optical engine to emit the light beam based on the startup picture and the prestored first light beam information, and the fourth control instruction is used for instructing the screen lifting module to control the projection screen to continuously lift according to the prestored lifting curve segment. Therefore, the startup picture and the projection screen are both lifted according to the lifting curve segment, so that the synchronism of the startup picture and the projection screen is ensured.

As shown in fig. 6, the rising curve segment includes a plurality of rising times and a plurality of rising heights corresponding to the plurality of rising times. The plurality of rising heights refers to height values between a first preset height and a second preset height.

It should be noted that, when the startup picture and the projection screen both ascend according to the ascending curve segment, the actual ascending height of the projection screen may be different from the ascending height according to the ascending curve segment due to the slipping of the ascending motor and the abrasion of the ascending frame included in the projection screen, and at this time, the ascending height of the projection screen or the ascending height of the startup picture needs to be adjusted, so as to further ensure the synchronism of the startup picture and the ascending of the projection screen.

Illustratively, the synchronicity of the startup picture and the projection screen can be further ensured by the following steps. The controller receives a second lifting height of the projection screen transmitted by the screen lifting module; the controller determines a third rising height of the startup picture according to the rising curve segment; when the difference value between the second rising height and the third rising height is larger than the difference value threshold value, the controller adjusts the rising speed of the starting-up picture, outputs the starting-up picture to the projection display module according to the adjusted rising speed, and then returns to the step that the controller receives the second rising height of the projection screen transmitted by the screen lifting module; and when the difference value between the second rising height and the third rising height is smaller than or equal to the difference threshold value, the controller continues to output the startup picture to the projection display module according to the rising curve segment.

Wherein the second elevation height is determined by the screen elevation module based on a second rotation angle of the elevation motor detected by the encoder. The controller can determine the rising time of the startup picture, and further determine a third rising height of the startup picture on the rising curve segment according to the rising time. And the controller adjusts the rising speed of the startup picture, including increasing the rising speed of the startup picture or reducing the rising speed of the startup picture. If the difference value between the second rising height and the third rising height which are re-determined after the adjustment is carried out for one time is larger than the difference threshold value, the rising speed of the picture of the opening machine is continuously adjusted until the difference value between the second rising height and the third rising height which are re-determined after the adjustment is smaller than or equal to the difference threshold value.

In the embodiment of the present application, in the process of performing step 506, the user may approach the projection device, and the light beam emitted from the optical engine may stimulate the eyes of the user. Therefore, the projection device further comprises an eye-protection detection unit, and stimulation of the user's eyes when the user approaches can be avoided in the following manner.

The controller receives a first detection distance sent by the projection display module; when the first detection distance is smaller than the first distance threshold, the controller sends a seventh control instruction to the projection display module and continues to receive the first detection distance sent by the projection display module until the first distance is larger than or equal to the first distance threshold, and the controller sends a third control instruction to the projection display module again;

the first detection distance is detected by the eye protection detection unit and is sent to the projection display module; and the seventh control instruction is used for instructing the projection display module to control the optical engine to emit the light beam based on the startup picture and the pre-stored second light beam information. The brightness value of the light beam emitted based on the second light beam information is smaller than the brightness value of the light beam emitted based on the first light beam information, and the brightness value of the light beam emitted by the optical engine can be reduced through the seventh control instruction, so that the stimulation to the eyes of the user is avoided.

Further, the projection device further comprises a sound box, and when the controller determines that the first detection distance is smaller than the first distance threshold after receiving the first detection distance sent by the projection display module, the controller indicates that the user is close to the projection device. At this moment, in order to remind the user, the controller sends a voice prompt message to the sound box and continues to receive the first detection distance sent by the projection display module until the first distance is greater than or equal to the first distance threshold.

The sound equipment can receive the voice prompt message sent by the controller, and then play the voice prompt message to prompt the user.

Step 507: and when the controller determines that the projection screen is lifted to a second preset height, sending a second control instruction to the screen lifting module.

In combination with the above description, the second preset height refers to a height of the projection screen when the projection screen is unfolded, so that if the projection screen is raised to the second preset height, it indicates that the projection screen is in an unfolded state, and at this time, the controller may send a second control instruction to control the projection screen to stop rising through the second control instruction.

And under the condition that the projection equipment comprises the encoder, the controller can receive the fourth lifting height sent by the screen lifting module and compare the fourth lifting height with the second preset height to determine whether the projection screen is lifted to the second preset height. The fourth elevation height is determined by the screen elevation module based on a fifth rotation angle of the elevation motor detected by the encoder.

By combining the introduction of the projection screen, the lifting motor and the curling motor are both in the power-off contracting brake state, and the curtain is ensured to be in the unfolding state. That is, the projection apparatus is in a normal on state at this time.

In the embodiment of the application, when the controller receives a start-up instruction, the projection display module and the screen lifting module are powered on first, then after the projection display module and the screen lifting module are ready, the projection screen is controlled to rise to a first preset height first, then the start-up picture and the projection screen are controlled to rise synchronously based on the rising curve segment until the projection screen rises to a second preset height, so that the synchronism of the start-up picture and the rise of the projection screen is ensured, and the picture display effect on the projection screen is further ensured. In addition, in the process of the startup picture and the projection screen rising, the startup picture and the projection screen can be adjusted based on the rising height of the startup picture and the rising height of the projection screen, so that the synchronism of the startup picture and the projection screen rising is further ensured, and the reliability of the projection equipment is further improved.

Next, a method for controlling shutdown of a projection apparatus according to an example of the embodiment of the present application will be explained.

Fig. 7 illustrates a flowchart of a shutdown control method for a projection apparatus according to an embodiment of the present application. The method is applied to the controller included in the projection device described in the above embodiment, and as shown in fig. 7, the method includes the following steps.

Step 701: when the controller receives a shutdown instruction, a shutdown picture is output to the projection display module according to a prestored descending curve segment, an eighth control instruction is sent to the projection display module, and a ninth control instruction is sent to the screen lifting module.

The eighth control instruction is used for instructing the projection display module to control the optical engine to emit the light beam based on the shutdown picture and the prestored first light beam information, and the ninth control instruction is used for instructing the screen lifting module to control the projection screen to descend to a first preset height according to a prestored descending curve segment. Therefore, the shutdown picture and the projection screen are both descended according to the descending curve segment, so that the descending synchronism of the shutdown picture and the projection screen is ensured.

As shown in fig. 8, the descending curve segment includes a plurality of descending times and a plurality of descending heights corresponding to the plurality of descending times. The plurality of lowered heights refer to height values between a first preset height and a second preset height.

In the embodiment of the application, when the shutdown picture and the projection screen both descend according to the descending curve segment, situations such as slipping of a lifting motor included in the projection screen and abrasion of the lifting frame may exist, so that the actual descending height of the projection screen is unequal to the descending height according to the descending curve segment, at this time, the descending height of the projection screen or the descending height of the shutdown picture needs to be adjusted, and the synchronism of the shutdown picture and the descending of the projection screen is further ensured.

Illustratively, the synchronism of the down-screen of the shutdown screen with the projection screen can be further ensured by the following steps (1) to (4).

(1) And the controller receives the second descending height of the projection screen transmitted by the screen lifting module.

And the second descending height is determined by the screen lifting module based on the fourth rotation angle of the lifting motor detected by the encoder.

Wherein the second elevation height is determined by the screen elevation module based on a second rotation angle of the elevation motor detected by the encoder.

(2) And the controller determines a third descending height of the shutdown picture according to the descending curve segment.

The controller can determine the descending time of the shutdown picture, and further determine a third descending height of the shutdown picture on the descending curve section according to the descending time.

(3) And when the difference value between the second descending height and the third descending height is larger than the difference threshold value, the controller adjusts the descending speed of the shutdown picture, outputs the shutdown picture to the projection display module according to the adjusted descending speed, and then returns to the step (1).

The controller adjusts the falling speed of the shutdown picture, including increasing the falling speed of the shutdown picture or decreasing the falling speed of the shutdown picture. If the difference value between the second descending height and the third descending height which are re-determined after the adjustment is performed for one time is larger than the difference threshold value, the descending speed of the shutdown picture is continuously adjusted until the difference value between the second descending height and the third descending height which are re-determined after the adjustment is smaller than or equal to the difference threshold value.

(4) And when the difference value between the second descending height and the third descending height is smaller than or equal to the difference value threshold value, the controller continues to output a shutdown picture to the projection display module according to the descending curve segment.

In the embodiment of the application, when the projection screen descends, a user may approach the projection device, and at this time, there may be a case where the user hinders the projection screen from descending. Therefore, the projection apparatus further includes an obstacle detection unit, and a situation in which the user obstructs the projection screen from descending can be avoided in the following manner.

The controller receives a second detection distance sent by the screen lifting module; when the second detection distance is smaller than the second distance threshold, the controller suspends outputting a shutdown picture to the projection display module, sends a tenth control instruction to the projection display module, sends a twelfth control instruction to the screen lifting module, and then returns to the step that the controller receives the second detection distance sent by the screen lifting module; when the second detection distance is larger than or equal to the second distance threshold, the controller continues to output a shutdown picture to the projection display module, sends an eighth control instruction to the projection display module, and sends a ninth control instruction to the screen lifting module.

And the second detection distance is detected by the obstacle detection unit and is sent to the screen lifting module.

Therefore, when the user hinders the projection screen from descending, the controller can control the emergent light beam to stop through the tenth control instruction, namely, the backlight is closed, and the projection screen is controlled to stop descending through the twelfth control instruction, so that the influence of the user is avoided, and meanwhile, the condition that a shutdown picture is not synchronous with the projection screen cannot occur when the subsequent projection screen continues descending.

Step 702: and when the controller determines that the projection screen descends to a first preset height, a tenth control instruction is sent to the projection display module, and an eleventh control instruction is sent to the screen lifting module.

The tenth control instruction is used for instructing the projection display module to control the optical engine to stop emitting light beams, and the eleventh control instruction is used for instructing the screen lifting module to control the projection screen to continuously descend.

When the projection screen descends to the first preset height, the projection screen is at the critical height, so that the optical engine is not required to emit light beams during the subsequent descending process of the projection screen, and at this time, the controller can enable the optical engine to stop emitting light beams through a tenth control instruction, namely enable the optical engine to turn off the backlight.

In addition, when the projection screen descends to the first preset height, the problem that a shutdown picture is synchronous with the projection screen does not need to be considered in the process that the subsequent projection screen continues to descend, so that the descending speed of the subsequent projection screen can be any numerical value, and the projection screen can continue to descend through the eleventh control instruction.

Wherein, the controller may determine that the projection screen is lowered to the first preset height by the following manner.

In some embodiments, in the case that the projection device includes the first trigger switch, when the controller receives the first trigger signal sent by the screen lifting module, the controller determines that the projection screen is lowered to a first preset height.

The first trigger signal is triggered when the projection screen descends to a first preset height and is sent to the screen lifting module.

In other embodiments, in the case that the projection screen includes the lifting motor and the projection apparatus further includes the encoder, the controller receives a first lowered height of the projection screen transmitted by the screen lifting module, and when a difference between the second preset height and the first lowered height is equal to the first preset height, the controller determines that the projection screen is lowered to the first preset height.

And the first descending height is determined by the screen lifting module based on the third rotating angle of the lifting motor detected by the encoder.

Of course, in the embodiment of the present application, in addition to determining that the projection screen is lowered to the first preset height through the two manners, it may also be determined that the projection screen is lowered to the first preset height through other manners. Illustratively, when the controller receives the confirmation instruction, it is determined that the projection screen is lowered to a first preset height. The confirmation command is triggered by the user when the projection screen is lowered to a first predetermined height.

In the embodiment of the present application, in the case that the projection device includes the sliding cover transmission mechanism, the sliding cover transmission mechanism may be in a state of avoiding the light-transmitting area of the receiving portion, and therefore, in order to effectively protect the optical engine, the sliding cover transmission mechanism may be controlled to slide to a state of shielding the light-transmitting area of the receiving portion in the following step 703.

Step 703: and the controller sends a fourteenth control instruction to the projection display module so that the controller receives a fifth trigger signal sent by the projection display module.

The fourteenth control instruction is used for indicating the projection display module to control the sliding cover transmission mechanism to slide, and the fifth trigger signal is sent to the projection display module when the sliding cover transmission mechanism triggers the light-transmitting area of the accommodating part.

In combination with the introduction of the projection display module, at this time, the controller sends a fourteenth control instruction to the display control unit, and then the display control unit sends a driving signal to the sliding cover driving unit based on the fourteenth control instruction so as to drive the sliding cover transmission mechanism to slide until the sliding cover transmission mechanism shields the light-transmitting area of the accommodating part.

Step 704: and when the controller determines that the projection screen descends to a third preset height, sending a twelfth control instruction to the screen lifting module.

And the twelfth control instruction is used for indicating the screen lifting module to control the projection screen to stop descending.

In this case, the projection screen is in the retracted state, and at this time, the projection screen may stop descending through a twelfth control instruction sent by the controller.

When the descending height of the projection screen is determined, the controller can receive a fourth descending height sent by the screen lifting module, and if the fourth descending height is equal to the second preset height, the controller indicates that the current height of the projection screen is the third preset height. The fourth descending height is determined by the screen lifting module according to the fifth rotating angle of the lifting motor detected by the encoder.

In the embodiment of the present application, in a case that the projection apparatus includes the flip transmission mechanism, the flip transmission mechanism may be in a state of avoiding the lifting opening of the storage portion, and therefore, in order to effectively protect the projection apparatus, the flip transmission mechanism may be controlled to be turned over to a state of shielding the lifting opening of the storage portion through the following step 705.

Step 705: and the controller sends a thirteenth control instruction to the screen lifting module so that the controller receives a fourth trigger signal sent by the screen lifting module.

The thirteenth control instruction is used for indicating the screen lifting module to control the turnover of the turnover cover transmission mechanism, and the fourth trigger signal is sent to the screen lifting module when the turnover cover transmission mechanism shields the lifting port of the storage part.

And combining the introduction of the screen lifting module, at the moment, the controller sends a thirteenth control instruction to the screen control unit, and then the screen control unit sends a driving signal to the flip driving unit based on the thirteenth control instruction so as to drive the flip transmission mechanism to overturn until the flip transmission mechanism shields the lifting port of the storage part.

It should be noted that, the step 703 may be executed before the step 704, or may be executed after the step 705, or may be executed after the step 704 and before the step 705, which is not limited in this embodiment of the application.

Step 706: the controller controls the power supply module to be disconnected with the projection display module and the screen lifting module respectively.

After the above steps 703 and 705 are performed, it indicates that the projection display module and the screen lifting module have performed all the actions to be performed and are in the standby state, and at this time, the controller may control the power supply module to be disconnected from the projection display module and the screen lifting module, respectively, that is, control both the projection display module and the screen lifting module to be in the power-off state, so as to complete the shutdown of the projection apparatus.

In the embodiment of the application, when the controller receives a shutdown instruction, the shutdown picture and the projection screen are controlled to synchronously descend based on the descending curve segment until the projection screen descends to the first preset height, so that the synchronism of the shutdown picture and the projection screen descending is ensured, and the display effect of the picture on the projection screen is further ensured. In addition, in the process of descending the shutdown picture and the projection screen, the descending height of the shutdown picture and the descending height of the projection screen can be adjusted, so that the synchronism of the descending of the shutdown picture and the projection screen is further ensured, and the reliability of the projection equipment is further improved.

The above description is only illustrative of the embodiments of the present application and is not intended to limit the embodiments of the present application, and any modification, equivalent replacement, or improvement made within the spirit and principle of the embodiments of the present application should be included in the scope of the embodiments of the present application.

Claims

1. A startup control method of a projection device, wherein the projection device comprises a controller, a power supply module, a projection display module, a screen lifting module, an optical engine and a projection screen, and the method is applied to the controller and comprises the following steps:

the third control instruction is used for instructing the projection display module to control the optical engine to emit a light beam based on the startup picture and first pre-stored light beam information, and the fourth control instruction is used for instructing the screen lifting module to control the projection screen to continuously lift according to the pre-stored rising curve segment;

2. The method of claim 1, wherein the projection device further comprises a first trigger switch, and wherein the controller determines that the projection screen is raised to a first preset height comprises:

3. The method of claim 1, wherein the projection screen includes a lift motor, the projection device further includes an encoder, and the controller determines that the projection screen is raised to a first predetermined height, including:

4. The method of claim 3, wherein after the controller sends the fourth control instruction to the screen lifting module, further comprising:

5. The method as claimed in any one of claims 1 to 4, wherein the projection device further comprises a receiving portion, a flip actuator, a slider actuator, a second trigger switch and a third trigger switch, and before the controller sends the first control instruction to the screen lifting module, the method further comprises:

6. The method of claim 5, wherein the projection device further comprises an eye-protection detection unit, and after the controller sends a third control instruction to the projection display module, the method further comprises:

7. The method of claim 6, wherein the projection device further comprises a speaker, and after the controller receives the first detected distance sent by the projection display module, the method further comprises:

8. A shutdown control method for a projection device, wherein the projection device comprises a controller, a power supply module, a projection display module, a screen lifting module, an optical engine and a projection screen, and the method is applied to the controller, and comprises the following steps:

the eighth control instruction is used for instructing the projection display module to control the optical engine to emit a light beam based on the shutdown picture and first light beam information stored in advance, and the ninth control instruction is used for instructing the screen lifting module to control the projection screen to descend to a first preset height according to the descending curve segment stored in advance;

9. The method of claim 8, wherein the projection device further comprises a first trigger switch, and wherein the controller determining that the projection screen is lowered to the first preset height comprises:

10. The method of claim 8, wherein the projection screen includes a lift motor, the projection device further includes an encoder, and the controller determines that the projection screen is lowered to the first preset height includes:

when the difference value between the second preset height and the first descending height is equal to the first preset height, the controller determines that the projection screen descends to the first preset height.

11. The method of claim 10, wherein after the controller sends a ninth control command to the screen lifting module, further comprising:

12. The method as claimed in any one of claims 8 to 11, wherein the projection device further comprises a receiving portion, a flip actuator, a slider actuator, a fourth trigger switch and a fifth trigger switch, and after the controller sends a twelfth control command to the screen lifting module, the method comprises: