CN115691365A

CN115691365A - Laser projection equipment and projection display method

Info

Publication number: CN115691365A
Application number: CN202110825816.8A
Authority: CN
Inventors: 唐甜甜; 吴超
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2023-02-03

Abstract

The application discloses laser projection equipment and a projection display method, and belongs to the field of projection display. When the laser projection device is in a standby state, if the main control circuit determines that a target object exists in the target range based on the detection signal, the main control circuit can control the power panel to supply power to the light source driving assembly and send a projection signal to the light valve driving assembly, so that the light valve driving assembly projects and displays a standby picture to a projection screen. That is, when the laser projection device is in a standby state, if it is detected that a target object exists in the target range, the standby picture can be projected and displayed in the projection screen, so that the functions of the laser projection device are effectively enriched.

Description

Laser projection equipment and projection display method

Technical Field

The present disclosure relates to the field of projection display, and in particular, to a laser projection apparatus and a projection display method.

Background

The laser projection device may include a system-on-chip, a power board, a main control circuit, a light valve driving assembly, a light source driving assembly, and a projection screen. In the process of displaying the projection picture on the projection screen, the system-level chip can control the power panel to supply power to the main control circuit, and the main control circuit is further used for controlling the power panel to supply power to the light valve driving assembly and the light source driving assembly. In a standby state, the system-on-chip can control the power panel to stop supplying power to the main control circuit. Because the main control circuit is in the power-off state, the light valve driving component and the light source driving component are both in the power-off state. At this time, the light source driving component cannot drive the light source to emit light beams, and accordingly, a projection picture cannot be displayed on the projection screen.

However, the laser projection apparatus is relatively simple in function.

Disclosure of Invention

The embodiment of the disclosure provides a laser projection device and a projection display method, which can solve the above problems. The technical scheme is as follows:

in one aspect, a laser projection apparatus is provided, the laser projection apparatus comprising: the device comprises a detection device, a system level chip, a main control circuit, a power panel, a light valve driving component and a light source driving component;

the detection device is used for detecting whether a target object exists in a target range or not and generating a detection signal based on a detection result;

the system-level chip is used for responding to standby operation, sending a standby instruction to the main control circuit and controlling the power panel to keep the state of supplying power to the main control circuit unchanged;

the main control circuit is used for responding to the standby instruction, controlling the power panel to keep the state of supplying power to the light valve driving assembly unchanged, controlling the power panel to stop supplying power to the light source driving assembly, and if the target object is determined to exist in the target range based on the detection signal, controlling the power panel to supply power to the light source driving assembly and sending a projection signal to the light valve driving assembly;

the light valve driving component is used for responding to the projection signal and displaying a standby picture to a projection screen in a projection manner in the process that the light source driving component drives the light source to emit light beams.

Optionally, the system-on-chip is further connected to the detection device;

the system-on-chip is further configured to acquire the detection signal from the detection device in response to the standby operation, and send the detection signal to the main control circuit.

Optionally, the main control circuit is further connected to the detection device;

the main control circuit is further configured to obtain the detection signal from the detection device in response to the standby instruction.

Optionally, the system on chip is configured to respond to a standby operation, and if it is determined that the standby mode of the laser projection apparatus is the target mode, send a standby instruction to the main control circuit, and control the power board to keep a state of supplying power to the main control circuit unchanged;

the main control circuit is configured to, in response to the standby instruction, control the power board to maintain a state of supplying power to the light valve driving component unchanged if it is determined that the standby mode of the laser projection apparatus is the target mode, control the power board to stop supplying power to the light source driving component, and control the power board to supply power to the light source driving component and send a projection signal to the light valve driving component if it is determined that the target object exists within the target range based on the detection signal.

Optionally, the laser projection apparatus further includes: a heat dissipating component;

the master control circuit is further used for responding to the standby instruction, controlling the power panel to supply power to the heat dissipation assembly, and controlling the power panel to supply power to the heat dissipation assembly if the target object is determined to exist in the target range based on the detection signal.

Optionally, the standby frame is a frame pre-stored in the light valve driving assembly;

alternatively, the first and second liquid crystal display panels may be,

the main control circuit is further configured to send a picture request signal to the system-on-chip if it is determined that the target object exists within the target range based on the detection signal, where the picture request signal is used to instruct the system-on-chip to send the pre-stored standby picture to the main control circuit;

the system-on-chip is also used for responding to the picture request signal and sending the pre-stored standby picture to the main control circuit;

the main control circuit is also used for sending the standby picture to the light valve driving component.

Optionally, the detection device is located on a side surface of the host casing, and a plane where the side surface is located intersects with a plane where the projection screen is located;

or, the detection device is located on one side of the main machine shell far away from the projection screen.

Optionally, the detection device includes at least one of a millimeter wave sensor, a pyroelectric infrared sensor, and a camera.

In another aspect, a projection display method is provided, the method including:

acquiring a detection signal generated by a detection device based on a detection result of whether a target object exists in a detection target range;

responding to the standby instruction, controlling the power panel to keep the state of supplying power to the light valve driving component unchanged;

controlling the power panel to stop supplying power to the light source driving assembly;

if the target object exists in the target range based on the detection signal, controlling the power panel to supply power to the light source driving assembly and sending a projection signal to the light valve driving assembly;

the standby instruction is sent to a main control circuit by a system-on-chip in response to a standby operation, and the standby operation is further used for indicating the system-on-chip to control the power panel to keep a state of supplying power to the main control circuit unchanged; the projection signal is used for indicating the light valve driving component to project and display the standby picture to a projection screen in the process of the light source emitting the light beam.

Optionally, the acquiring the detection signal includes:

acquiring the detection signal from the detection device in response to the standby instruction.

The beneficial effect that technical scheme that this disclosure embodiment provided brought includes at least:

the embodiment of the disclosure provides a laser projection device and a projection display method, when the laser projection device is in a standby state, if a main control circuit determines that a target object exists in a target range based on a detection signal, the main control circuit can control a power panel to supply power to a light source driving assembly and send a projection signal to a light valve driving assembly, so that the light valve driving assembly projects and displays a standby picture to a projection screen. That is, when the laser projection device is in a standby state, if it is detected that a target object exists in the target range, the standby picture can be projected and displayed in the projection screen, so that the functions of the laser projection device are effectively enriched.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is apparent that the drawings in the description below are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings may be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a laser projection apparatus provided in an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of another laser projection apparatus provided in the embodiments of the present disclosure;

fig. 3 is a schematic structural diagram of another laser projection apparatus provided in an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of another laser projection apparatus provided in an embodiment of the present disclosure;

fig. 5 is a flowchart of a projection display method provided by an embodiment of the present disclosure;

FIG. 6 is a flow chart of another projection display method provided by the embodiments of the present disclosure;

fig. 7 is a flowchart of another projection display method provided in the embodiments of the present disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a laser projection apparatus provided in the disclosed embodiment, and fig. 2 is a schematic structural diagram of another laser projection apparatus provided in the disclosed embodiment. As shown in fig. 1 and 2, the laser projection apparatus may include a detection device 10, a System On Chip (SOC) 20, a main control circuit 30, a power board 40, a light valve driving assembly 50, a light source driving assembly 60, and a light source 70.

Wherein the detection device 10 is located outside the housing of the main machine 00. The system-on-chip 20, the main control circuit 30, the power board 40, the light valve driving assembly 50, the light source driving assembly 60, and the light source 70 are all located inside the housing of the host 00.

The system-on-chip 20 is located on a main board of the laser projection device, and the main control circuit 30 and the light valve driving assembly 50 are both located on a display panel of the laser projection device. The main control circuit 30 may be a micro-controller unit (MCU), and the light valve driving component 50 may be a Digital Light Processing (DLP) component. The light source 70 may be a laser.

The detection device 10 may include at least one of a millimeter wave sensor, a pyroelectric infrared sensor, and a camera. The detection device 10 may be located on a side of the housing of the main unit 00, where a plane of the side intersects with a plane of the projection screen 01. Alternatively, referring to fig. 1, the detection device 10 may be located on a side of the housing of the host 00 away from the projection screen 01.

The detection device 10 is used to detect whether a target object exists within a target range and generate a detection signal based on the detection result.

In one embodiment, the detection device 10 may periodically or in real time detect whether a target object is present within the target range and generate a detection signal based on the detection result.

Wherein the detection signal is used to indicate whether a target object, which may be a person located within the detection range of the detection device 10, is present in the target range. The target range may be a detection range of the detection device 10, or the target range may be a fixed range stored in the detection device 10 in advance, and the target range is located within the detection range of the detection device 10.

The system-on-chip 20 is respectively connected to the main control circuit 30 and the power board 40, and the system-on-chip 20 is configured to send a standby instruction to the main control circuit 30 in response to a standby operation and control the power board 40 to keep a state of supplying power to the main control circuit 30 unchanged.

The standby operation may be a click operation for a standby button in a remote controller for controlling the laser projection apparatus, or a click operation for a standby button on the main body 00 casing.

The main control circuit 30 is further connected to the power board 40, the light valve driving component 50, and the light source driving component 60, respectively, and the main control circuit 30 is configured to, in response to a standby instruction, control the power board 40 to maintain a state of supplying power to the light valve driving component 50 unchanged, control the power board 40 to stop supplying power to the light source driving component 60, and if it is determined that a target object exists in a target range based on the detection signal, control the power board 40 to supply power to the light source driving component 60, and send a projection signal to the light valve driving component 50.

The light source driving assembly 60 is connected to the light source 70, and the light source driving assembly 60 is used for driving the light source 70 to emit a light beam. The light valve driving assembly 50 is used for responding to a projection signal and displaying a standby image on the projection screen 01 in a projection manner during the light beam emitting process of the light source 70.

Referring to fig. 2, the laser projection apparatus may further include a light valve 80 and a projection lens 90, and the light valve driving assembly 50 may generate a light valve control signal according to a pixel value of each pixel in the standby screen, control the light valve 80 to modulate a light beam irradiated onto a surface of the light source 70 into an image light beam based on the light valve control signal, and control the light valve 80 to transmit the image light beam to the projection lens 90 based on the light valve control signal. The projection lens 90 is used for projecting the image beam transmitted by the light valve 80 to the projection screen 01, so as to implement projection display of the standby image on the projection screen 01. For example, weather information, time information, and the like may be included in the standby screen.

In the embodiment of the present disclosure, the main control circuit 30 is further configured to send a current driving signal to the light source driving component 60, the light source driving component 60 is configured to send a driving current to the light source 70 in response to the current driving signal, and the light source 70 is configured to emit a light beam under the driving of the driving current.

To sum up, the embodiment of the present disclosure provides a laser projection apparatus, where when the laser projection apparatus is in a standby state, if the main control circuit determines that a target object exists in a target range based on the detection signal, the main control circuit may control the power board to supply power to the light source driving component, and send a projection signal to the light valve driving component, so that the light valve driving component projects and displays a standby image on a projection screen. That is, when the laser projection device is in a standby state, if it is detected that a target object exists in the target range, the laser projection device can project and display a standby picture in the projection screen, so that functions of the laser projection device are effectively enriched.

And when the laser projection device is in a standby state, the main control circuit can respond to the standby instruction, control the power panel to keep the state of supplying power to the light valve driving assembly unchanged, and the power panel can keep the state of supplying power to the main control circuit unchanged. That is, when the laser projection apparatus is in the standby state, the main control circuit and the light valve driving component are both in the working state, so that when the main control circuit determines that a target object exists in the target range, the main control circuit can quickly control the power panel to supply power to the light source driving component, and send a projection signal to the light valve driving component, so as to quickly display the standby picture to the projection screen in a projection manner.

In the embodiment of the present disclosure, the standby frame may be a frame pre-stored in the light valve driving component 50.

Alternatively, the standby screen may be a screen stored in advance in the system-on-chip 20. The main control circuit 30 is further configured to send a screen request signal to the system-on-chip 20 if it is determined that the target object exists in the target range based on the detection signal, where the screen request signal is used to instruct the system-on-chip 20 to send a pre-stored standby screen to the main control circuit 30. The system on chip 20 is further configured to send a pre-stored standby screen to the main control circuit 30 in response to the screen request signal. The main control circuit 30 is further configured to send the standby frame to the light valve driving component 50. After receiving the standby image, the light valve driving assembly 50 may project and display the standby image on the projection screen 01 in the process of emitting the light beam from the light source 70.

Referring to fig. 3 and 4, the laser projection apparatus may further include a first switching circuit 100, a second switching circuit 110, and a third switching circuit 120. The first switch circuit 100, the second switch circuit 110, and the third switch circuit 120 may each be a switch (switch).

The first switch circuit 100 is connected to the power board 40, the system-on-chip 20, and the main control circuit 30. The system-on-chip 20 is used for controlling the first switch circuit 100 to keep in a conducting state in response to the standby operation, so that the power panel 40 continuously supplies power to the main control circuit 30. Thereby enabling the main control circuit 30 to be in an operating state when the laser projection apparatus is in a standby state.

The control terminal of the first switch circuit 100 is connected to the system-on-chip 20, the input terminal of the first switch circuit 100 is connected to the power board 40, and the output terminal of the first switch circuit 100 is connected to the main control circuit 30. The system on chip 20 is configured to continuously send an enable signal with an active level to the control terminal of the first switch circuit 100 in response to the standby operation, so that the first switch circuit 100 maintains a conducting state.

The second switch circuit 110 is respectively connected to the power board 40, the main control circuit 30 and the light valve driving component 50, and the main control circuit 30 is configured to control the second switch circuit 110 to keep a conducting state in response to a standby instruction, so that the power board 40 continuously supplies power to the light valve driving component 50. Thereby causing the light valve driving assembly 50 to be in an operating state when the laser projection apparatus is in a standby state.

The control end of the second switch circuit 110 is connected to the main control circuit 30, the input end of the second switch circuit 110 is connected to the power board 40, and the output end of the second switch circuit 110 is connected to the light valve driving component 50. The main control circuit 30 is configured to continuously send an enable signal with an active level to the control terminal of the second switch circuit 110 in response to the standby instruction, so that the second switch circuit 110 maintains a conducting state.

The third switch circuit 120 is respectively connected to the power board 40, the main control circuit 30 and the light source driving component 60, and the main control circuit 30 is configured to, in response to a standby instruction, control the third switch circuit 120 to be turned off, so that the power board 40 stops supplying power to the light source driving component 60, and if it is determined that a target object exists in a target range based on the detection signal, control the third switch circuit 120 to be turned on, so that the power board 40 supplies power to the light source driving component 60.

The control terminal of the third switch circuit 120 is connected to the main control circuit 30, the input terminal of the third switch circuit 120 is connected to the power panel 40, and the output terminal of the third switch circuit 120 is connected to the light source driving component 60.

The main control circuit 30 is configured to send an enable signal with an inactive level to the control terminal of the third switch circuit 120 in response to the standby instruction, thereby turning off the third switch circuit 120. And if the main control circuit 30 determines that the target object exists in the target range based on the detection signal, it may transmit an enable signal whose level is the valid level to the control terminal of the third switch circuit 120, thereby turning on the third switch circuit 120.

In one possible implementation, the detection device 10 may include a millimeter wave sensor, and the detection device 10 may emit a millimeter wave signal and may receive a millimeter wave signal reflected by a target object. If the target range is the detection range of the detection device 10, the detection device 10 may determine that the detection result is that the target object exists within the target range after receiving the millimeter wave signal reflected by the target object, and therefore the detection signal generated by the detection device 10 based on the detection result may be used to indicate that the target object exists within the target range. The detection device 10 may determine that the detection result is that the target object does not exist within the target range when the millimeter wave signal reflected by the target object is not received, and therefore the detection signal generated by the detection device 10 based on the detection result may be used to indicate that the target object does not exist within the target range.

If the target range is a fixed range stored in the detection device 10 in advance, the detection device 10 may determine the position of the target object based on the millimeter wave signal reflected by the target object and detect whether the position of the target object is within the target range. If the detection result is that the position of the target object is within the target range, the detection signal generated by the detection device 10 based on the detection result may be used to indicate that the target object is within the target range. If the detection result is that the position of the target object is not within the target range, the detection signal generated by the detection device 10 based on the detection result may be used to indicate that the target object is not within the target range.

The position of the target object may include a target distance between the target object and the detection device 10 and an azimuth angle of the target object, among others. The detection device 10 may determine a difference signal from the received millimeter wave signal and determine a target distance between the target object and the detection device 10 from a peak frequency of the difference signal. Also, the detection device 10 may determine the azimuth at the target object according to the difference of the phase angles of two adjacent difference signals.

In another possible embodiment, the detection device 10 may include a pyroelectric infrared sensor that may detect an infrared signal radiated from the target object. If the target range is the detection range of the detection device 10, the detection device 10 may determine that the detection result is that the target object exists within the target range after detecting the infrared signal radiated by the target object, and therefore the detection signal generated by the detection device 10 based on the detection result may be used to indicate that the target object exists within the target range. When the infrared signal radiated by the target object is not detected, the detection device 10 may determine that the target object does not exist in the target range, and thus the detection signal generated by the detection device 10 based on the detection result may be used to indicate that the target object does not exist in the target range.

If the target range is a fixed range pre-stored in the detection device 10, the detection device 10 may amplify the detected infrared signal, convert the amplified infrared signal into an electrical signal, and detect whether the amplitude of the electrical signal is greater than an amplitude threshold. If the detection result is that the amplitude of the electrical signal is greater than or equal to the amplitude threshold, the detection signal generated by the detection device 10 based on the detection result may be used to indicate that the target object exists in the target range. If the detection result is that the amplitude of the electrical signal is smaller than the amplitude threshold, the detection signal generated by the detection device 10 based on the detection result may be used to indicate that the target object is not present in the target range. Wherein the amplitude threshold may be a fixed value pre-stored in the detection device 10.

In yet another possible embodiment, the detection device 10 may include a camera, and if the target range is the detection range of the detection device 10, the detection device 10 may detect whether the target object exists in the captured image captured by the detection device. If the detection result is that the target object exists in the captured image, the detection signal generated by the detection device 10 based on the detection result may be used to indicate that the target object exists within the target range. If the detection result is that the target object does not exist in the captured image, the detection signal generated by the detection device 10 based on the detection result may be used to indicate that the target object does not exist within the target range.

If the target range is a fixed range stored in the detection device 10 in advance, the detection device 10 can detect the ratio of the area occupied by the target object in the captured image to the area of the captured image. If the detection result is that the ratio is greater than or equal to the ratio threshold, the detection signal generated by the detection device 10 based on the detection result may be used to indicate that the target object exists in the target range. If the ratio is smaller than the ratio threshold, the detection signal generated by the detection device 10 based on the detection result may be used to indicate that the target object is not present within the target range. Wherein the ratio threshold may be a fixed value pre-stored in the detection device 10.

In an alternative implementation manner of the embodiment of the present disclosure, referring to fig. 3, the system on chip 20 is further connected to the detection device 10. The system on chip 20 is also configured to acquire a detection signal from the detection device 10 in response to a standby operation, and send the acquired detection signal to the main control circuit 30.

The system-on-chip 20 is further configured to send a signal acquisition instruction to the detection device 10 in response to the standby operation, and the detection device 10 may send the generated detection signal to the system-on-chip 20 in response to the signal acquisition instruction after receiving the signal acquisition instruction.

In an alternative implementation manner of the embodiment of the present disclosure, referring to fig. 4, the main control circuit 30 is further connected to the detection device 10, and the main control circuit 30 is further configured to obtain a detection signal from the detection device 10 in response to a standby instruction.

The main control circuit 30 is further configured to send a signal obtaining instruction to the detection device 10 in response to the standby instruction, and the detection device 10 may send the generated detection signal to the main control circuit 30 in response to the signal obtaining instruction after receiving the signal obtaining instruction.

In the embodiment of the present disclosure, the system on chip 20 is configured to, in response to the standby operation, send a standby instruction to the main control circuit 30 and control the power board 40 to keep the state of supplying power to the main control circuit 30 unchanged if it is determined that the standby mode of the laser projection apparatus is the target mode.

The main control circuit 30 is configured to, in response to the standby instruction, control the power board 40 to keep the state of supplying power to the light valve driving component 50 unchanged if it is determined that the standby mode of the laser projection apparatus is the target mode, control the power board 40 to stop supplying power to the light source driving component 60, and control the power board 40 to supply power to the light source driving component 60 and send a projection signal to the light valve driving component 50 if it is determined that a target object exists in the target range based on the detection signal.

In the disclosed embodiment, the laser projection apparatus may display a plurality of modes in response to a mode selection operation while in an operating state. The laser projection apparatus may set a standby mode of the laser projection apparatus to a target mode after receiving a selection operation for the target mode among the plurality of modes. The laser projection apparatus may set a standby mode of the laser projection apparatus to a normal mode after receiving a selection operation for the normal mode among the plurality of modes.

The mode selection operation may be a click operation on a mode selection button in the remote controller, or a selection operation on a mode selection button displayed on the projection screen 01, or may be a voice instruction for performing mode selection.

In the embodiment of the present disclosure, the system on chip 20 is further configured to send a power-off command to the main control circuit 30 in response to the standby operation if the standby mode of the laser projection apparatus is determined to be the normal mode. The main control circuit 30 may control the power board 40 to stop supplying power to the light valve driving component 50 and the light source driving component 60 in response to the power-off command, and then send a feedback signal to the system-on-chip 20. The system on chip 20 can control the power board 40 to stop supplying power to the main control circuit 30 in response to the feedback signal. That is, when the standby mode of the laser projection apparatus is the normal mode, the main control circuit 30, the light valve driving assembly 50 and the light source driving assembly 60 are all in the power-off state.

Referring to fig. 3 and 4, the laser projection apparatus may further include a heat sink assembly 130 connected to the main control circuit 30. The main control circuit 30 is further configured to control the power board 40 to stop supplying power to the heat sink 130 in response to a standby instruction, and if it is determined that a target object exists in a target range based on the detection signal, control the power board 40 to supply power to the heat sink 130. The heat sink assembly 130 can dissipate heat from devices inside the housing of the host 00.

Referring to fig. 3 and 4, the laser projection apparatus may further include a fourth switching circuit 140, and the fourth switching circuit 140 is connected to the power board 40, the main control circuit 30, and the heat sink 130, respectively. The main control circuit 30 is further configured to, in response to the standby instruction, control the fourth switch circuit 140 to turn off, so that the power board 40 stops supplying power to the heat dissipation assembly 130, and if it is determined that the target object exists in the target range based on the detection signal, control the fourth switch circuit 140 to turn on, so that the power board 40 supplies power to the heat dissipation assembly 130.

The control end of the fourth switch circuit 140 is connected to the main control circuit 30, the input end of the fourth switch circuit 140 is connected to the power board 40, and the output end of the fourth switch circuit 140 is connected to the heat dissipation assembly 130. The main control circuit 30 is further configured to send an enable signal with an inactive level to the control terminal of the fourth switch circuit 140 in response to the standby instruction, so as to turn off the fourth switch circuit 140. If the main control circuit 30 determines that the target object exists in the target range based on the detection signal, it may send an enable signal whose level is an active level to the control terminal of the fourth switch circuit 140, so that the fourth switch circuit 140 is turned on.

In the embodiment of the present disclosure, the main control circuit 30 may further send a driving current to the heat dissipation assembly, so that the heat dissipation assembly operates under the driving of the driving current.

The main control circuit 30 is further configured to control the power board 40 to stop supplying power to the main control circuit 30 in response to a power-off command when the standby mode of the laser projection apparatus is determined to be the normal mode.

To sum up, the embodiment of the present disclosure provides a laser projection apparatus, where when the laser projection apparatus is in a standby state, if the main control circuit determines that a target object exists in a target range based on the detection signal, the main control circuit may control the power board to supply power to the light source driving component, and send a projection signal to the light valve driving component, so that the light valve driving component projects and displays a standby image on a projection screen. That is, when the laser projection device is in a standby state, if it is detected that a target object exists in the target range, the standby picture can be projected and displayed in the projection screen, so that the functions of the laser projection device are effectively enriched.

And when the laser projection device is in a standby state, the main control circuit can respond to the standby instruction, control the power panel to keep the state of supplying power to the light valve driving assembly unchanged, and the power panel can keep the state of supplying power to the main control circuit unchanged. That is, when the laser projection device is in the standby state, the main control circuit and the light valve driving component are both in the working state, so that when the main control circuit determines that a target object exists in the target range, the main control circuit can quickly control the power panel to supply power to the light source driving component and send a projection signal to the light valve driving component, and then quickly project and display the standby picture to the projection screen.

Fig. 5 is a flowchart of a projection display method provided by an embodiment of the present disclosure, which may be applied to the main control circuit 30 inside the host 00 in the laser projection apparatus shown in fig. 1, fig. 2, fig. 3, or fig. 4.

As shown in fig. 5, the method may include:

step 501, acquiring a detection signal.

The detection signal is generated by the detection device based on a detection result of whether or not the target object exists within the detection target range.

And step 502, responding to a standby instruction, and controlling the power panel to keep the state of supplying power to the light valve driving component unchanged.

The standby instruction is sent to the main control circuit by the system-on-chip in response to the standby operation, and the standby operation is also used for indicating the system-on-chip to control the power supply board to keep the state of supplying power for the main control circuit unchanged.

And 503, controlling the power panel to stop supplying power to the light source driving component.

Step 504, if it is determined that the target object exists in the target range based on the detection signal, controlling the power panel to supply power to the light source driving assembly, and sending a projection signal to the light valve driving assembly.

The projection signal is used for indicating the light valve driving component to project and display the standby picture to the projection screen in the process of the light beam emitted by the light source.

The specific implementation process of step 501 to step 504 may refer to the foregoing embodiment, and the embodiment of the present disclosure is not limited herein.

To sum up, the embodiment of the present disclosure provides a projection display method, when the laser projection apparatus is in a standby state, if the main control circuit determines that a target object exists in a target range based on the detection signal, the main control circuit may control the power board to supply power to the light source driving component, and send a projection signal to the light valve driving component, so that the light valve driving component projects and displays a standby image onto a projection screen. That is, when the laser projection device is in a standby state, if it is detected that a target object exists in the target range, the laser projection device can project and display a standby picture in the projection screen, so that functions of the laser projection device are effectively enriched.

Fig. 6 is a flowchart of another projection display method provided in an embodiment of the present disclosure, and the method may be applied to the main control circuit 30 inside the host 00 in the laser projection apparatus shown in fig. 1, fig. 2, fig. 3, or fig. 4. As shown in fig. 6, the method may include:

step 601, receiving a detection signal acquired by the system-on-chip from the detection device.

Step 602, in response to the standby instruction, controlling the power board to maintain the state of supplying power to the light valve driving component unchanged.

The main control circuit may respond to the standby instruction, and may perform steps 602 to 604 if it is determined that the standby mode of the laser projection apparatus is the target mode.

The standby instruction is sent to the main control circuit when the system-on-chip responds to the standby operation and determines that the standby mode of the laser projection device is the target mode, and the standby operation is also used for indicating the system-on-chip to control the power panel to keep the state of supplying power for the main control circuit unchanged.

And 603, controlling the power panel to stop supplying power to the light source driving component and the heat dissipation component.

And step 604, if the target object exists in the target range is determined based on the detection signal, controlling the power panel to supply power to the light source driving assembly and the heat dissipation assembly, and sending a projection signal to the light valve driving assembly.

The standby picture is a picture pre-stored in the light valve driving assembly. Or, if the main control circuit determines that the target object exists in the target range based on the detection signal, the main control circuit may send a picture request signal to the system-on-chip, where the picture request signal is used to instruct the system-on-chip to send a pre-stored standby picture to the main control circuit; and then sending the standby picture sent by the system level chip to the light valve driving component.

The specific implementation process of step 601 to step 604 may refer to the foregoing embodiments, and the embodiments of the present disclosure are not limited herein.

Fig. 7 is a flowchart of another projection display method provided by an embodiment of the present disclosure, and the method may be applied to the main control circuit 30 inside the host 00 in the laser projection apparatus shown in fig. 1, fig. 2, fig. 3, or fig. 4. As shown in fig. 7, the method may include:

step 701, acquiring a detection signal from a detection device.

Step 702, in response to the standby instruction, controlling the power board to maintain the state of supplying power to the light valve driving component unchanged.

The main control circuit may respond to the standby instruction, and if the standby mode of the laser projection apparatus is determined to be the target mode, steps 702 to 704 may be executed.

And step 703, controlling the power panel to stop supplying power to the light source driving assembly and the heat dissipation assembly.

Step 704, if it is determined that the target object exists in the target range based on the detection signal, controlling the power panel to supply power to the light source driving component and the heat dissipation component, and sending a projection signal to the light valve driving component.

The standby picture is a picture pre-stored in the light valve driving assembly. Or, if the main control circuit determines that the target object exists in the target range based on the detection signal, the main control circuit may send a picture request signal to the system-on-chip, where the picture request signal is used to instruct the system-on-chip to send a pre-stored standby picture to the main control circuit. Then the main control circuit sends the standby picture sent by the system level chip to the light valve driving component.

The specific implementation process of step 701 to step 704 may refer to the foregoing embodiment, and the embodiment of the present disclosure is not limited herein.

In the disclosed embodiments, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" in the embodiments of the present disclosure means two or more.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims

1. A laser projection device, characterized in that the laser projection device comprises: the device comprises a detection device, a system-level chip, a main control circuit, a power panel, a light valve driving component and a light source driving component;

the main control circuit is used for responding to the standby instruction, controlling the power panel to keep the state of supplying power to the light valve driving component unchanged, controlling the power panel to stop supplying power to the light source driving component, and controlling the power panel to supply power to the light source driving component and send a projection signal to the light valve driving component if the target object is determined to exist in the target range based on the detection signal;

2. The laser projection device of claim 1, wherein the system-on-chip is further connected to the detection device;

3. The laser projection device of claim 1, wherein the master control circuit is further connected to the detection device;

4. A laser projection device as claimed in any one of claims 1 to 3,

the system-level chip is used for responding to standby operation, sending a standby instruction to the main control circuit and controlling the power panel to keep the state of supplying power to the main control circuit unchanged if the standby mode of the laser projection equipment is determined to be a target mode;

5. A laser projection device as claimed in any one of claims 1 to 3, wherein the laser projection device further comprises: a heat dissipating component;

6. The laser projection apparatus according to any of claims 1 to 3, wherein the standby frame is a frame pre-stored in the light valve driving component;

alternatively, the first and second electrodes may be,

7. A laser projection device as claimed in any one of claims 1 to 3, wherein the detection means is located on a side of the main housing, the plane of the side intersecting the plane of the projection screen;

8. A laser projection device as claimed in any one of claims 1 to 3, wherein the detection means comprises at least one of a millimeter wave sensor, a pyroelectric infrared sensor and a camera.

9. A method of projection display, the method comprising:

the standby instruction is sent to a main control circuit by a system-on-chip in response to a standby operation, and the standby operation is also used for indicating the system-on-chip to control the power panel to keep a state of supplying power to the main control circuit unchanged; the projection signal is used for indicating the light valve driving component to project and display the standby picture to a projection screen in the process of the light source emitting the light beam.

10. The method of claim 9, wherein the acquiring a detection signal comprises: