CN112687216B - Laser projection apparatus and control method thereof - Google Patents
Laser projection apparatus and control method thereof Download PDFInfo
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- CN112687216B CN112687216B CN202011581068.5A CN202011581068A CN112687216B CN 112687216 B CN112687216 B CN 112687216B CN 202011581068 A CN202011581068 A CN 202011581068A CN 112687216 B CN112687216 B CN 112687216B
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Abstract
The application discloses laser projection equipment and a control method thereof, and belongs to the field of projection display. According to the control method, when the laser projection equipment determines that the current eye protection mode is different from the target eye protection mode corresponding to the application scene of the laser projection equipment, the eye protection mode of the laser projection equipment can be switched to the target eye protection mode. Therefore, the eye protection mode of the laser projection equipment can be flexibly adjusted according to the application scene of the laser projection equipment, and the flexibility of switching the eye protection mode is improved. Moreover, the reliability of eye protection is improved, and the damage of laser beams emitted by the laser projection equipment to eyes is effectively avoided.
Description
Technical Field
The present disclosure relates to the field of projection display, and in particular, to a laser projection apparatus and a control method thereof.
Background
At present, after laser emitted by laser projection equipment is projected onto a projection screen, projection images can be projected onto the projection screen. However, since the laser light emitted from the laser projection apparatus has a high brightness, the laser light may cause damage to human eyes when the user is close to the projection screen.
Disclosure of Invention
The embodiment of the disclosure provides a laser projection device and a control method thereof, which can solve the problem that laser may cause damage to human eyes in the related art. The technical scheme is as follows:
in one aspect, a method for controlling a laser projection apparatus is provided, the method including:
determining an application scene of the laser projection equipment;
determining a target eye protection mode corresponding to the application scene;
and if the current eye protection mode of the laser projection equipment is different from the target eye protection mode, switching the eye protection mode of the laser projection equipment into the target eye protection mode.
Optionally, the determining an application scenario of the laser projection apparatus includes:
receiving a detection signal of a target object in front of or at the side of the laser projection equipment, wherein the detection signal is used for representing the posture of the target object;
and determining the application scene of the laser projection equipment according to the posture of the target object.
Optionally, if the number of the target objects is one; determining an application scenario of the laser projection device according to the posture of the target object, including:
If the posture of the target object is the target posture, determining that the application scene of the laser projection equipment is a social scene;
and if the posture of the target object is not the target posture, determining that the application scene of the laser projection equipment is a film watching scene.
Optionally, the number of the target objects is multiple; determining an application scenario of the laser projection device according to the posture of the target object, including:
if the gesture of the target object with the shortest distance to the laser projection equipment in the plurality of target objects is a target gesture, determining that an application scene of the laser projection equipment is a social scene;
and if the postures of the target objects are not the target postures, determining that the application scene of the laser projection equipment is a viewing scene.
Optionally, the target gesture includes one or more of the following gestures:
gestures where the distance of movement is greater than a distance threshold;
moving an attitude having a frequency greater than a first frequency threshold;
an attitude at which the swing amplitude is greater than an amplitude threshold;
and (d) gestures where the wobble frequency is greater than a second frequency threshold.
Optionally, the determining an application scenario of the laser projection apparatus includes:
And determining the application scene of the laser projection equipment according to the type of the currently running application program of the laser projection equipment.
Optionally, the human eye protection mode of the laser projection device includes a social contact mode and a film watching mode; the method further comprises the following steps:
if the human eye protection mode of the laser projection equipment is the social contact mode, detecting whether a target object in front of or on the side of the laser projection equipment is located in a recommended area;
and if the target object is not located in the recommendation area, displaying a prompt picture on a projection picture, wherein the prompt picture is used for prompting that the target object moves to the recommendation area.
Optionally, the method further includes:
determining the recommendation area according to the height of the target object, wherein the distance between the recommendation area and the laser projection equipment is positively correlated with the height of the target object.
Optionally, the method further includes:
and if the human eye protection mode of the laser projection equipment is the film watching mode and the target object in front of or at the side of the laser projection equipment is positioned in the human eye protection range, changing the display of the projection picture.
In another aspect, there is provided a laser projection apparatus, configured to:
Determining an application scene of the laser projection equipment, wherein the application scene of the laser projection equipment comprises a social scene and a film watching scene;
determining a target human eye protection mode corresponding to the application scene;
and if the current eye protection mode of the laser projection equipment is different from the target eye protection mode, switching the eye protection mode of the laser projection equipment into the target eye protection mode.
In yet another aspect, there is provided a laser projection apparatus including: a memory, a processor and a computer program stored on the memory, the processor implementing the method of controlling a laser projection apparatus as described in the above aspect when executing the computer program.
In yet another aspect, a computer-readable storage medium is provided, in which instructions are stored, the instructions being loaded and executed by a processor to implement the control method of the laser projection apparatus according to the above aspect.
In a further aspect, a computer program product containing instructions is provided, which when run on the computer causes the computer to perform the method of controlling a laser projection apparatus of the above aspect.
The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:
the embodiment of the disclosure provides laser projection equipment and a control method thereof, and in the control method, when the laser projection equipment determines that the current eye protection mode is different from a target eye protection mode corresponding to an application scene of the laser projection equipment, the eye protection mode can be switched to the target eye protection mode. Therefore, the eye protection mode of the laser projection equipment can be flexibly adjusted according to the application scene of the laser projection equipment, the flexibility of switching the eye protection modes is improved, the reliability of eye protection is improved, and the damage of laser beams emitted by the laser projection equipment to eyes is effectively avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, 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 disclosure, and it is obvious for those skilled in the art to obtain other drawings based on 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 flowchart of a control method of a laser projection apparatus provided in an embodiment of the present disclosure;
fig. 3 is a flowchart of another control method of a laser projection apparatus provided by an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a first target location of a target object provided by an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of determining a recommendation area according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of a prompt screen provided by an embodiment of the present disclosure;
fig. 7 is a schematic diagram of a target distance between a detection device and a target object according to an embodiment of the disclosure;
FIG. 8 is a schematic structural diagram of another laser projection apparatus provided in an embodiment of the present disclosure;
FIG. 9 is a schematic structural diagram of another laser projection apparatus provided in the embodiments of the present disclosure;
fig. 10 is a schematic diagram of a detection signal emitted by a signal emitter according to an embodiment of the disclosure;
FIG. 11 is a schematic diagram of a detection signal emitted by another signal emitter provided by the embodiments of the present disclosure;
FIG. 12 is a schematic diagram of another signal emitter emitting a detection signal and a signal receiver receiving the detection signal reflected by a target object provided by the embodiments of the present disclosure;
fig. 13 is a schematic diagram of a difference signal provided by the embodiment of the 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 an embodiment of the present disclosure. As shown in fig. 1, the laser projection apparatus may include a housing 00 and a detection device 10.
Wherein, referring to fig. 1, the detection device 10 is located at a side of the housing 00 away from the display screen 20, or the detection device 10 is located at a side of the housing 00, which side intersects with the display screen 20. The first detection angle of the detection device 10 in the first plane is larger than 0 and smaller than 150 degrees. The second detection angle of the detection device 10 in the second plane is larger than 0 and smaller than 110 degrees. Alternatively, the detection angle refers to an angle that can be detected by the detection device 10, and the first plane is parallel to the bearing surface of the laser projection apparatus. The second plane is perpendicular to the first plane. Alternatively, the detection device 10 may be a millimeter wave sensor, and the detection signal may be a millimeter wave detection signal.
The detection device 10 is configured to emit a detection signal and receive the detection signal reflected by the target object 001, and the detection signal may be used to represent the position and/or posture of the target object 001. The target object 001 may be a human or animal located within the detection range of the detection device 10. The laser projection apparatus is configured to project an image beam onto the display screen 20 to display a projection picture on the display screen 20.
Fig. 2 is a flowchart of a control method of a laser projection apparatus according to an embodiment of the present disclosure. The method may be applied in a laser projection device as shown in fig. 1. As shown in fig. 2, the method may include:
The laser projection equipment can determine the current application scene in real time or periodically during the process of projecting the image light beam. The application scenes of the laser projection device can comprise social scenes and viewing scenes.
The laser projection equipment is pre-stored with the corresponding relation between the application scene and the human eye protection mode. And the human eye protection mode corresponding to the social scene in the corresponding relation is a social mode, and the human eye protection mode corresponding to the film watching scene is a film watching mode. After determining the current application scene, the laser projection device may determine the target eye protection mode corresponding to the current application scene from the corresponding relationship. Wherein the laser projection device can perform different eye protection operations in different types of eye protection modes.
For example, if the current application scene of the laser projection device is a social scene, the laser projection device may determine that the target eye protection mode is a social mode from the corresponding relationship.
After determining the target eye protection mode, the laser projection device may detect whether the current eye protection mode is the same as the target eye protection mode. If the current eye protection mode is different from the target eye protection mode, the laser projection device may switch the eye protection mode to the target eye protection mode. If the current eye protection mode is the same as the target eye protection mode, the laser projection device may keep the current eye protection mode unchanged, and perform eye protection based on the eye protection mode.
To sum up, the embodiment of the present disclosure provides a control method for a laser projection device, in which when it is determined that a current eye protection mode is different from a target eye protection mode corresponding to an application scene of the laser projection device, the laser projection device may switch the eye protection mode to the target eye protection mode. Therefore, the eye protection mode of the laser projection equipment can be flexibly adjusted according to the application scene of the laser projection equipment, the flexibility of switching the eye protection modes is improved, the reliability of eye protection is improved, and the damage of laser beams emitted by the laser projection equipment to eyes is effectively avoided.
Fig. 3 is a flowchart of another control method of a laser projection apparatus according to an embodiment of the present disclosure. The method may be applied in a laser projection device as shown in fig. 1. As shown in fig. 3, the method may include:
The laser projection equipment can determine the current application scene in real time or periodically during the process of projecting the image light beam. The application scenes of the laser projection device can comprise social scenes and viewing scenes.
In the process of determining the application scene of the laser projection device, as an optional implementation manner of the embodiment of the present disclosure, a detection device in the laser projection device may receive a detection signal reflected by a target object in front of or at a side of the laser projection device, and determine the posture of the target object based on the detection signal. And then the laser projection equipment can determine the application scene of the laser projection equipment according to the posture of the target object. The gesture of the target object may include movement and/or swing, and the swing may refer to a swing of a part of the body of the target object. For example, arm or leg swing of the target object.
Optionally, the detection signal may be indicative of a position of the target object. The position of the target object may include a target distance d between the target object 001 and the detection device 10 and an azimuth angle β of the target object 001. Referring to fig. 4, the laser projection apparatus may establish a coordinate system, which may include a horizontal axis X and a vertical axis Y, with the position of the detection device 10 as an origin. If the detection device 10 is a millimeter wave sensor, the detection signal is a millimeter wave signal. The laser projection apparatus may determine a difference signal from the received detection signal and determine a target distance d between the target object 001 and the detection device 10 from a peak frequency of the difference signal. And, the laser projection apparatus may determine the azimuth angle β at the target object 001 according to the difference of the phase angles of two adjacent difference signals. Wherein, the azimuth angle β is an included angle between a connecting line between the target object 001 and the XY origin of the coordinate system and the horizontal axis X.
In the embodiment of the disclosure, in the process of determining the posture of the target object, the laser projection device may determine the moving distance of the target object within the first duration according to the position of the target object before the first duration and the position of the target object after the first duration, and may determine the change frequency of the position of the target object within the second duration as the moving frequency of the target object. Meanwhile, the laser projection equipment can also determine the change frequency of the position of a certain part of the target object in the third time length as the swing frequency of the target object, and can determine the swing amplitude of the certain part of the target object according to the position of the certain part of the target object before the fourth time length and the position of the certain part of the target object after the fourth time length. The first time period, the second time period, the third time period and the fourth time period may be the same or different.
Optionally, if the number of the target objects is one, after determining the posture of the target object, the laser projection device may detect whether the posture of the target object is the target posture. If the posture of the target object is the target posture, the laser projection device may determine that the target object is currently interacting with the laser projection device in a moving/swinging manner, and then the laser projection device may determine that the application scene is a social scene. If the posture of the target object is not the target posture, the laser projection equipment can determine that the application scene is the viewing scene.
In embodiments of the present disclosure, the target pose may include one or more of the following poses: gestures with a movement distance greater than a distance threshold, gestures with a movement frequency greater than a first frequency threshold, gestures with a swing amplitude greater than an amplitude threshold, and gestures with a swing frequency greater than a second frequency threshold.
The distance threshold, the first frequency threshold, the amplitude threshold and the second frequency threshold may be fixed values pre-stored in the laser projection device. The target pose may be a pre-stored fixed pose in the laser projection device.
Optionally, if the number of the target objects is multiple, after the laser projection device determines the posture of the target object, the position of each target object may be determined, so as to obtain the distance between each target object and the laser projection device. Then, the laser projection apparatus may detect whether the posture of the target object having the shortest distance from the laser projection apparatus is the target posture. If the gesture of the target object with the shortest distance to the laser projection device is the target gesture, the laser projection device may determine that the application scene is a social scene. If the posture of the target object with the shortest distance to the laser projection device is not the target posture, the laser projection device may detect whether the postures of the other target objects in the plurality of target objects are the target postures. If the posture of any one of the other target objects is the target posture, the laser projection device may determine that the application scene is a social scene. If the postures of the target objects are not the target postures, the laser projection equipment can determine that the application scene is the viewing scene. Wherein the other target objects are target objects except the target object with the shortest distance to the laser projection device in the plurality of target objects.
In the embodiment of the disclosure, in the process of determining the target posture, if the laser projection device is in a social scene (for example, when a user performs body-building through interaction of the laser projection device), the laser projection device may display an interactive interface, where first prompt information may be displayed in the interactive interface, where the first prompt information is used to prompt the user to perform interaction within a specified range. For example, the first prompt message may be: please wave the arm or move it 1 meter (m) away from the laser projection device. In this process, the laser projection device may periodically obtain the user's pose in the social setting, which may include movement and/or oscillation. If in a viewing scene (e.g., when a user is watching a television program), the laser projection device may periodically capture the user's gesture. And then the laser projection equipment can determine one or more of the collected gestures with the moving distance larger than a distance threshold, the moving frequency larger than a first frequency threshold, the swinging amplitude larger than an amplitude threshold and the swinging frequency larger than a second frequency threshold as a target gesture, and stores the target gesture.
As another optional implementation manner of the embodiment of the present disclosure, the laser projection device may determine an application scenario of the laser projection device according to a type of an application program currently running on the laser projection device.
The type of the application program can comprise an interactive type and a non-interactive type. The interactive type application is an application that requires the target object to interact with the laser projection device, and may be, for example, a game application, a fitness application, a photography application, a remote video application, and the like. The non-interactive application is an application that does not require the target object to interact with the laser projection device, and may be, for example, a video playing application, a music application, and the like.
When detecting that the type of the currently running application program is the interaction type, the laser projection device may determine that the application scene is a social scene. When detecting that the type of the currently running application program is not the interactive type, the laser projection equipment can determine that the application scene is the viewing scene.
In the embodiment of the present disclosure, the laser projection device may store a corresponding relationship between the identifier and the type of the application program and a corresponding relationship between the type and the application scene in advance. When the laser projection device runs the current application program, the target type corresponding to the identifier of the currently running application program can be determined from the corresponding relationship between the identifier and the type. Then, the laser projection device may determine, based on the correspondence between the type and the application scene, the application scene corresponding to the target type, and further determine the application scene of the laser projection device. Alternatively, the identification of the application may be the name of the application.
As another optional implementation manner of the embodiment of the present disclosure, the laser projection device may be provided with a setting button of an application scenario. After detecting the selection operation of the user on the setting button of the application scene, the laser projection device may display a setting interface of the application scene, where the setting interface of the application scene may include a selection button of a social scene and a selection button of a viewing scene. The laser projection device may set the parameter value of the characteristic parameter to the first target value after detecting a selection instruction of a selection button of the user for the social scene. The laser projection device may set the parameter value of the characteristic parameter to a second target value after detecting a selection instruction of a user for a selection button of the viewing scene.
If the laser projection device detects that the parameter value of the characteristic parameter is the first target value, the laser projection device may determine that the application scene is a social scene. If the laser projection device detects that the parameter value of the characteristic parameter is the second target value, the laser projection device may determine that the application scene is a viewing scene.
The laser projection equipment is pre-stored with the corresponding relation between the application scene and the human eye protection mode. And the human eye protection mode corresponding to the social scene in the corresponding relation is a social mode, and the human eye protection mode corresponding to the film watching scene is a film watching mode. After determining the current application scene, the laser projection device may determine the target eye protection mode corresponding to the current application scene from the corresponding relationship.
For example, if the current application scene of the laser projection device is a social scene, the laser projection device may determine that the target human eye protection mode is a social mode from the corresponding relationship.
After determining the target eye protection mode, the laser projection device may detect whether the current eye protection mode is the same as the target eye protection mode. If the current eye protection mode is different from the target eye protection mode, the laser projection apparatus may perform step 304. If the current eye protection mode is the same as the target eye protection mode, the laser projection apparatus may execute step 301, and keep the current eye protection mode unchanged, that is, perform eye protection based on the eye protection mode.
And 304, switching the eye protection mode of the laser projection equipment to a target eye protection mode.
When determining that the current eye protection mode is different from the target eye protection mode, the laser projection equipment can switch the eye protection mode to the target eye protection mode, and then carry out eye protection based on the target eye protection mode.
And 305, detecting whether the human eye protection mode of the laser projection equipment is a social mode.
After the laser projection device switches the eye protection mode to the target eye protection mode, whether the current eye protection mode of the laser projection device is the social mode or not can be detected. If the eye protection mode of the laser projection device is the social mode, the laser projection device may execute step 306. If the eye protection mode of the laser projection apparatus is the viewing mode, the laser projection apparatus may execute step 310.
After the laser projection equipment determines that the eye protection mode of the laser projection equipment is the social mode, the height of the target object can be determined, and the recommendation area is determined according to the height of the target object. The height of the target object may be the height of the target object, or the height of any part of the body of the target object from the ground. For example, the height of the target object may be the height of the knee of the target object from the ground.
The distance between the recommendation area and the laser projection device is positively correlated with the height of the target object, that is, the higher the height of the target object is, the farther the distance between the recommendation area and the laser projection device is, the lower the height of the target object is, and the closer the distance between the recommendation area and the laser projection device is.
It should be noted that the minimum distance between the recommended area and the laser projection device is greater than a distance threshold, and the distance threshold can prevent the laser beam emitted by the laser projection device from damaging human eyes.
When the application scene of the laser projection device is in the social mode, the target object needs to interact with the laser projection device, and at the moment, the camera of the laser projection device needs to acquire the image of the target object and respond based on the acquired image of the target object. By determining different recommendation areas for the target objects with different heights, the flexibility of determining the recommendation areas is improved, and meanwhile, the camera can acquire complete target objects, so that the laser projection equipment can accurately respond to the target objects with different heights.
Alternatively, a camera may be disposed on a side of the display screen 20 away from the ground, and the laser projection device may determine the height of the target object based on an image of the target object captured by the camera.
In the embodiment of the present disclosure, the correspondence between the height and the area may be stored in the laser projection apparatus in advance. After determining the height of the target object, the laser projection device may determine a recommended region corresponding to the height of the target object based on the correspondence between the height and the region.
Alternatively, referring to fig. 5, the height H of the camera 01 from the ground and the pitch angle θ of the camera may be stored in the laser projection apparatus in advance. After the height H of the target object is determined, the laser projection device may determine a recommended distance L between a recommended area and the laser projection device according to the height H between the camera 01 and the ground, the pitch angle θ and the height H of the target object, where L satisfies: l ═ H) × (90- θ). The laser projection device may then determine an area that is a recommended distance from the laser projection device, and an area that is located in front of or to the side of the laser projection device, as the recommended area.
Alternatively, a fixed recommended area may be stored in the laser projection device in advance, that is, different target objects all correspond to the fixed recommended area. After determining that the eye protection mode of the laser projection device is the social mode, the laser projection device may directly perform step 307.
And 307, detecting whether the target object in front of or at the side of the laser projection equipment is located in the recommended area.
After determining the recommended area, the laser projection device may detect whether the position of the target object is located within the recommended area. If the target object is not located within the recommended area, the laser projection device may perform step 308.
After step 308 is performed, the laser projection device may acquire the position of the target object in real time and detect whether the position of the target object is located in the recommended area in real time. If it is detected that the position of the target object is within the recommended area, step 309 may be performed. The laser projection device may continue to receive the detection signal reflected by the target object if the laser projection device detects that the target object is located within the recommended area without performing step 308.
And 308, displaying a prompt picture on the projection picture.
After the laser projection equipment detects that the position of the target object is not located in the recommended area, a prompt picture can be displayed on the projection picture, wherein the prompt picture is used for prompting that the target object moves to the recommended area, so that the camera can acquire the complete target object. The prompt may include textual and/or graphical information. For example, referring to fig. 6, the prompt screen 002 displayed on the display screen may be: please move to a distance of 1 meter from the laser projection device.
In the process of displaying the prompt picture, the laser projection device can keep the playing state of the projection picture unchanged, that is, the laser projection device can play the projection picture received from the front-end device in real time.
And 309, canceling the display of the prompt picture.
After the laser projection equipment displays the prompt picture on the projection picture, the position of the target object can be acquired in real time, and whether the position of the target object is located in the recommended area or not is detected in real time. If the position of the target object is detected to be located in the recommended area, the laser projection equipment can cancel displaying the prompt picture.
And 310, if the target object in front of or at the side of the laser projection equipment is positioned in the protection range of human eyes, changing the display of the projection picture.
The laser projection device may determine the position of the target object based on the detection signal reflected by the target object after detecting that the eye protection mode is the viewing mode. And detecting whether the position of the target object is within the protection range of human eyes. If the position of the target object is detected to be within the eye protection range, the laser projection device can determine that the distance between the target object and the laser projection device is short, and the laser beam emitted by the laser projection device can damage the eyes of the target object, so that the laser projection device can change the display of the projection picture, and the eyes of the target object are protected. If the position of the target object is detected not to be within the protection range of human eyes, the laser projection equipment can determine that the distance between the target object and the laser projection equipment is longer, and the laser beam emitted by the laser projection equipment cannot damage the eyes of the target object, so that the laser projection equipment can not change the display of a projection picture. Wherein the human eye protection range is a fixed range pre-stored in the laser projection device.
For example, if the distance between the target object and the laser projection device is 1m, the upper limit of the detection distance corresponding to the human eye protection range is 1.5m, and since the 1m is smaller than the 1.5m, the laser projection device may determine that the position of the target object is within the human eye protection range, and thus the laser projection device may change the display of the projection screen.
As an optional implementation manner of the present disclosure, if the laser projection device detects that the position of the target object is within the protection range of the human eyes, the brightness of the projection picture may be changed.
The human eye protection range may include a plurality of threshold detection ranges, and the detection distances and/or detection angles corresponding to the different threshold detection ranges are different. The detection distance is a distance between the target object and the detection device, and the detection angle is an angle of the target object relative to the detection device. The laser projection apparatus may determine a threshold detection range in which the position of the target object is located, and adjust the luminance of the projection screen to a luminance corresponding to the threshold detection range in which the position of the target object is located, based on a correspondence relationship between the threshold detection range and the luminance.
Optionally, the multiple threshold detection ranges may include a first threshold detection range, a second threshold detection range, and a third threshold detection range, and if it is determined that the position of the target object is within the first threshold detection range, the laser projection device may determine, from a correspondence between the threshold detection range and the brightness, a first brightness corresponding to the first threshold detection range, and adjust the brightness of the projection image to the first brightness. If the laser projection device determines that the position of the target object is within the second threshold detection range, the laser projection device may determine second brightness corresponding to the second threshold detection range from a corresponding relationship between the threshold detection range and the brightness, and adjust the brightness of the projection image to the second brightness. If the laser projection device determines that the position of the target object is within the third threshold detection range, it may determine, from the correspondence between the threshold detection range and the brightness, a third brightness corresponding to the third threshold detection range, and adjust the brightness of the projection screen to the third brightness.
The upper limit of the detection distance corresponding to the first threshold detection range is smaller than or equal to the distance threshold, and the lower limit of the detection distance corresponding to the first threshold detection range is larger than the upper limit of the detection distance corresponding to the second threshold detection range. The lower limit of the detection distance corresponding to the second threshold detection range is greater than the upper limit of the detection distance corresponding to the third threshold detection range. The first brightness may be less than or equal to the original brightness, the second brightness less than the first brightness, and the third brightness less than the second brightness. The original brightness may be the brightness of the projected picture without adjusting the brightness of the projected picture.
By way of example, the distance threshold may be 1.5 m. The upper limit of the detection distance corresponding to the first threshold detection range may be 1.5m, and the lower limit may be greater than 1 m. The upper limit of the detection distance corresponding to the second threshold detection range may be 1m, and the lower limit is greater than 0.5 m. The upper limit of the detection distance corresponding to the third threshold detection range may be 0.5m, and the lower limit may be 0. The first luminance may be 80% of the original luminance, the second luminance may be 50% of the original luminance, and the third luminance may be 0.
For example, assuming that the correspondence relationship between the detection distance corresponding to the threshold detection range and the brightness is shown in table 1, referring to table 1 and fig. 7, if the target distance d of the target object is 1m, it can be determined from table 1 that the target distance 1m is within the detection distance corresponding to the second threshold detection range. The second brightness corresponding to the second threshold detection range is 50% of the original brightness, and the laser projection device may adjust the brightness of the projection screen to be 50% of the original brightness.
TABLE 1
| Detecting distance | Brightness of light |
| [0，0.5m] | 0 |
| (0.5m，1m] | 50% of the original brightness |
| (1m，1.5m] | 80% of the original brightness |
As another optional implementation manner of the embodiment of the present disclosure, if the laser projection device detects that the position of the target object is within the human eye protection range, the second prompt information may be displayed on the projection screen. The second prompt message is used for prompting the position of the target object, and the second prompt message can be changed according to the position change of the target object. Optionally, the second prompt message may include at least one of text message and image message. For example, if the target distance d of the target object is 1m, the second prompt message may be: the distance between the laser projection device and the current position of the user is 1m, and the user is far away from the laser projection device.
In this disclosure, the laser projection device may display the second prompt message on the projection screen while keeping the playing state of the projection screen unchanged, that is, the laser projection device plays the projection screen transmitted by the front-end device in real time.
As another optional implementation manner of the embodiment of the present disclosure, if the laser projection device detects that the position of the target object is within the human eye protection range, the second prompt information may be displayed on the projection screen while changing the brightness of the projection screen.
In an embodiment of the present disclosure, the laser projection device may further include an audio player. After detecting that the position of the target object is within the human eye protection range, the laser projection device may play audio through an audio player, where the audio is used to prompt the position of the target object, and the audio may be changed according to the change in the position of the target object.
It should be noted that the order of the steps of the control method for the laser projection apparatus provided in the embodiment of the present disclosure may be appropriately adjusted, and the steps may also be deleted according to the situation. For example, step 305 to step 309 may be deleted as appropriate, or step 310 may be deleted as appropriate. Or steps 306 to 309 may be deleted as the case may be. Any method that can be easily conceived by those skilled in the art within the technical scope of the present disclosure is covered by the protection scope of the present disclosure, and thus, the detailed description thereof is omitted.
To sum up, the embodiment of the present disclosure provides a control method for a laser projection device, in which when it is determined that a current eye protection mode is different from a target eye protection mode corresponding to an application scene of the laser projection device, the laser projection device may switch the eye protection mode to the target eye protection mode. Therefore, the eye protection mode of the laser projection equipment can be flexibly adjusted according to the application scene of the laser projection equipment, and the flexibility of switching the eye protection mode is improved. Moreover, the reliability of eye protection is improved, and the damage of laser beams emitted by the laser projection equipment to eyes is effectively avoided.
Referring to fig. 8, the laser projection apparatus may further include a laser light source 30, a main board 40, a display panel 50, a light valve 60, and a projection lens 70. The laser light source 30 is used to emit a laser beam. Alternatively, the laser light source 30 may include at least one of an infrared light source, a blue light source, and a green light source. The main board 40 is configured to receive a projection image sent by the front-end device and transmit the projection image to the display panel 50. The display panel 50 is configured to generate a light valve control signal according to a pixel value of a pixel in the projection image, and control the light valve 60 to turn over according to the light valve control signal. The inverted light valve 60 is used for transmitting the light beam irradiated to the surface by the laser source 30 to the projection lens 70. The projection lens 70 is used for projecting the light beam transmitted by the light valve 60 to the display screen 20, so as to implement projection display of a projection picture on the display screen 20.
In the disclosed embodiment, the detection device 10 is used for emitting a detection signal and receiving a detection signal of a target object in front of or at the side of the laser projection apparatus. The detection means 10 are also used for determining the position of the target object and/or the pose of the target object from the detection signal. Referring to fig. 8, if the sensing device 10 is connected to the display panel 50, the sensing device 10 may transmit the position and/or posture of the target object to the display panel 50. Alternatively, the detecting device 10 may transmit the received detection signal to the display panel 50. The display panel 50 may determine the position and/or posture of the target object based on the detection signal.
Therefore, the above steps 201 to 203, and the above steps 301 to 310 may be performed by the display panel 50.
If the detection device 10 is connected to the main board 40, the detection device 10 may transmit the determined position and/or posture of the target object to the main board 40. Alternatively, the detection device 10 may transmit the received detection signal to the main board 40. The main board 40 may determine the position and/or posture of the target object based on the detection signal.
Therefore, the steps 201 to 203, and the steps 301 to 310 can be performed by the motherboard 40. The embodiment of the present disclosure is described by taking the detecting device 10 connected to the display panel 50 as an example.
Embodiments of the present disclosure provide a laser projection device, which may be as shown in fig. 1 and 8, the laser projection device configured to:
determining an application scene of the laser projection equipment, wherein the application scene of the laser projection equipment comprises a social scene and a viewing scene. And determining a target eye protection mode corresponding to the application scene. And if the current eye protection mode of the laser projection equipment is different from the target eye protection mode, switching the eye protection mode of the laser projection equipment into the target eye protection mode.
To sum up, the embodiment of the present disclosure provides a laser projection device, where when it is determined that a current eye protection mode is different from a target eye protection mode corresponding to an application scene of the laser projection device, the laser projection device may switch the eye protection mode to the target eye protection mode. Therefore, the eye protection mode of the laser projection equipment can be flexibly adjusted according to the application scene of the laser projection equipment, the flexibility of switching the eye protection modes is improved, the reliability of eye protection is improved, and the damage of laser beams emitted by the laser projection equipment to eyes is effectively avoided.
Optionally, the laser projection device is configured to receive a detection signal of a target object in front of or at a side of the laser projection device, where the detection signal is used to represent a posture of the target object. And determining the application scene of the laser projection equipment according to the posture of the target object.
Optionally, if the number of the target objects is one, the laser projection device is configured to determine that the application scene of the laser projection device is a social scene if the posture of the target object is the target posture. And if the posture of the target object is not the target posture, determining that the application scene of the laser projection equipment is a film watching scene.
Optionally, if the number of the target objects is multiple, the laser projection device is configured to determine that the application scene of the laser projection device is a social scene if a gesture of a target object, which is located at the shortest distance from the laser projection device, of the multiple target objects is a target gesture. And if the postures of the target objects are not the target postures, determining that the application scene of the laser projection equipment is a film watching scene.
Optionally, the target gesture includes one or more of the following gestures:
gestures that move a distance greater than a distance threshold;
moving gestures with a frequency greater than a first frequency threshold;
the swing amplitude is greater than the amplitude threshold value;
a gesture with a wobble frequency greater than a second frequency threshold.
Optionally, the laser projection device is configured to determine an application scenario of the laser projection device according to a type of an application program currently running on the laser projection device.
Optionally, the eye protection mode of the laser projection device includes a social mode and a viewing mode. The laser projection equipment is further used for detecting whether a target object in front of or at the side of the laser projection equipment is located in the recommended area or not if the human eye protection mode of the laser projection equipment is the social mode. And if the target object is not located in the recommendation area, displaying a prompt picture on the projection picture, wherein the prompt picture is used for prompting the target object to move to the recommendation area.
The laser projection equipment is also used for determining a recommendation area according to the height of the target object, and the distance between the recommendation area and the laser projection equipment is positively correlated with the height of the target object.
The laser projection equipment is also used for changing the display of a projection picture if the human eye protection mode of the laser projection equipment is the film watching mode and the target object in front of or at the side of the laser projection equipment is positioned in the human eye protection range.
Referring to fig. 8, the laser projection apparatus may further include a light source driving circuit 80, and the light source driving circuit 80 is connected to the laser light source 30 and the display panel 50, respectively.
The display panel 50 may store a correspondence relationship between the luminance and the current control signal in advance. The display panel 50 may determine the target current control signal corresponding to the luminance corresponding to the threshold detection range in which the first target position is located from the correspondence relationship between the luminance and the current control signal after determining the luminance corresponding to the threshold detection range in which the first target position is located in the process of changing the luminance of the projection screen. Thereafter, the display panel 50 may transmit the target current control signal to the light source driving circuit 80, and the light source driving circuit 80 may transmit the target driving current to the laser light source 30 in response to the target current control signal. The laser light source 30 emits a laser beam driven by the target drive current.
In the correspondence relationship between the brightness and the current control signal, the duty ratio of the current control signal is positively correlated with the brightness, that is, the lower the brightness is, the smaller the duty ratio of the current control signal is, the smaller the driving current sent by the corresponding light source driving circuit 80 to the laser light source 30 is; the higher the luminance, the larger the duty ratio of the current control signal, and the larger the drive current sent by the corresponding light source drive circuit 80 to the laser light source 30.
Referring to fig. 8, the laser projection apparatus may further include an audio driving circuit 90 and an audio player 91. The display panel 50 is also used for controlling the audio driving circuit 90 to drive the audio player 91 to play audio, the audio is used for prompting the position of the target object, and the audio can be changed along with the position change of the target object.
Referring to fig. 9, the detection device 10 may include a power supply driving circuit 101, a signal generation circuit 102, a signal transmitter 103, a signal mixing circuit 104, a signal receiver 105, a filter 106, a digital-to-analog converter 107, a data processing circuit 108, and a controller 109.
The power driving circuit 101 is connected to the signal generating circuit 102, and the power driving circuit 101 is configured to transmit a driving signal to the signal generating circuit 102.
The signal generating circuit 102 is also connected to the signal mixing circuit 104 and the signal transmitter 103, respectively, and the signal generating circuit 102 is configured to generate a detection signal under the driving of the driving signal transmitted by the power driving circuit 101, and transmit the generated detection signal to the signal transmitter 103 and the signal mixing circuit 104, respectively.
The signal transmitter 103 is used for transmitting a detection signal. The signal receiver 105 is connected to the signal mixing circuit 104, and the signal receiver 105 is configured to receive a detection signal of the target object 001 and transmit the received detection signal to the signal mixing circuit 104.
The signal mixing circuit 104 is further connected to the filter 106, and the signal mixing circuit 104 is configured to determine a difference signal according to the received detection signal transmitted by the signal generation circuit 102 and the received detection signal transmitted by the signal receiver 105, and transmit the difference signal to the filter 106.
The filter 106 is further connected to the digital-to-analog converter 107, and the filter 106 is configured to perform filtering processing on the difference signal and transmit the filtered difference signal to the digital-to-analog converter 107.
The digital-to-analog converter 107 is further connected to the data processing circuit 108, and the digital-to-analog converter 107 is configured to convert the filtered difference signal into an analog signal and transmit the analog signal to the data processing circuit 108.
The data processing circuit 108 is further connected to the controller 109, and the data processing circuit 108 is configured to determine a peak frequency of the analog signal and a difference between phase angles of two adjacent analog signals, respectively, and transmit the peak frequency of the analog signal and the difference between the phase angles of the two adjacent analog signals to the controller 109.
The controller 109 is also connected to the main control circuit 501, and the controller 109 is configured to determine a target distance d between the target object 001 and the detection device 10 according to a peak frequency of the analog signal. And determining the azimuth angle beta of the target object 001 according to the difference value of the phase angles. The target distance d and the azimuth angle β are then transmitted to the main control circuit 501 included in the display panel 50.
Optionally, the controller 109 is further connected to the power driving circuit 101, and the controller 109 is configured to transmit a driving command to the power driving circuit 101. The power supply drive circuit 101 is configured to transmit a drive signal to the signal generation circuit 102 in response to a drive instruction.
If the detection device 10 is a millimeter wave sensor, the detection signal may be a millimeter wave signal. Referring to fig. 10 and 11, the millimeter wave signal may be a high frequency continuous wave whose amplitude a varies sinusoidally with time t. And the frequency f varies linearly with time t. The detection signal received by the signal mixing circuit 104 and transmitted by the signal generating circuit 102 is the detection signal transmitted by the signal transmitter 103.
Referring to fig. 12 and 13, since the signal generating circuit 102 transmits the detection signal 0031 to the signal mixing circuit 104 with a certain time interval Ta until the signal receiver 105 receives the detection signal 0032, the signal mixing circuit 104 can determine the difference signal IF according to the detection signal 0031 transmitted by the signal generating circuit 102 and the detection signal 0032 transmitted by the signal receiver 105.
In the embodiment of the present disclosure, the controller 109 may store a correspondence relationship between the frequency and the distance in advance, and after determining the peak frequency, the controller 109 may determine the target distance d corresponding to the peak frequency of the analog signal from the correspondence relationship between the frequency and the distance.
Wherein, in the corresponding relation between the frequency and the distance, the distance
V is the transmission speed of the millimeter wave signal, F is the frequency in the frequency-distance correspondence, and referring to fig. 11, Tc is the time period for the millimeter wave signal 002 emitted by the signal emitter 103 to increase from the initial frequency F0 to the maximum frequency F1. The B is a letterThe bandwidth of millimeter-wave signal 002 transmitted by signal transmitter 103. For example, the initial frequency f0 may be 77 gigahertz (GHz), the bandwidth B may be 4GHz, the duration Tc may be 40 microseconds (μ s), and the maximum frequency f1 may be 81 GHz.
Alternatively, the controller 109 may store the calculation formulas of the transmission speed V, the duration Tc, the bandwidth B, and the above distance d in advance. After determining the peak frequency F, the controller 109 may determine the target distance d corresponding to the peak frequency of the analog signal according to the above calculation formula of the distance d, and the duration Tc and the bandwidth B stored in advance.
Optionally, the controller 109 may also store a corresponding relationship between the difference of the phase angles and the azimuth angle in advance. After determining the difference between the phase angles of two adjacent analog signals, the controller 109 may determine the azimuth angle corresponding to the difference between the phase angles of two adjacent analog signals from the corresponding relationship between the difference between the phase angles and the azimuth angle.
In the corresponding relationship between the difference of the phase angles and the azimuth angle, the azimuth angle β satisfies:
wherein Δ Φ is a difference between phase angles of two adjacent analog signals, and L is a spacing distance between two adjacent receiving antennas.
Alternatively, the controller 109 stores in advance calculation formulas of the initial frequency f0, the transmission speed V, the spacing distance L1, and the azimuth angle β. After receiving the difference between the phase angles of two adjacent analog signals, the controller 109 may determine the azimuth angle corresponding to the difference between the phase angles according to the above calculation formula of the azimuth angle β, and the pre-stored initial frequency f0, transmission speed V and separation distance L1.
The signal receiver 105 may include a plurality of receive antennas (only three receive antennas, a first receive antenna 1051, a second receive antenna 1052, and a third receive antenna 1053, respectively, are shown in fig. 9). Each of the receiving antennas is configured to receive a detection signal reflected by the target object 001 and transmit the received detection signal to the signal mixing circuit 104. The signal mixing circuit 104 may determine a difference signal IF corresponding to each receiving antenna based on the received detection signal transmitted by the signal generation circuit 102 and the received detection signal transmitted by each receiving antenna, thereby obtaining a plurality of difference signals IF. The at least one difference signal IF is then transmitted to the filter 106.
The filter 106 may filter the plurality of difference signals and transmit the filtered plurality of difference signals to the digital-to-analog converter 107. The digital-to-analog converter 107 may convert the filtered plurality of difference signals IF into analog signals, obtain a plurality of analog signals, and transmit the plurality of analog signals to the data processing circuit 108.
The data processing circuit 108 may determine a peak frequency of each of the plurality of analog signals and send the peak frequency of each analog signal to the controller 109. The controller 109 may determine a plurality of initial distances according to the plurality of peak frequencies, and use the average of the plurality of initial distances as the target distance d between the target object 001 and the detection device 10.
The data processing circuit 108 may further determine a difference value of phase angles of analog signals corresponding to any two adjacent receiving antennas in the plurality of receiving antennas, so as to obtain a plurality of difference values, and send the plurality of difference values to the controller 109. The controller 109 may determine an azimuth angle according to each difference, obtain a plurality of initial azimuth angles, and then determine a mean value of the plurality of initial azimuth angles as the azimuth angle β of the target object. The controller 109 may then transmit the target distance d and the azimuth angle β of the target object to the main control circuit 501. The master control circuit 501 may perform the above-described method embodiments.
In the disclosed embodiments, according to the fourier transform theory: the observation window can detect frequency components spaced more than 1/T apart, i.e.
It can be determined by the above calculation formula of the target distance d,
it can be seen that the range resolution of the detection device, which refers to the amount of change in the distance over which the detection device can detect the movement of the target object, is related to the bandwidth of the detection signal emitted by the detection device. Because the distance resolution of the detection device is related to the bandwidth of the detection signal emitted by the detection device, the detection device with the bandwidth of the emitted detection signal being GHz can detect the centimeter-level or even millimeter-level change distance. By using the detection device of this accuracy, even if the distance change of the target object is small, the detection device can detect the changing distance of the target object, and can distinguish whether the target object is stationary or changing.
For example, assuming that the bandwidth of the detection signal emitted by the detection device is 77GHz, the distance resolution of the detection device can reach 1.94 millimeters (mm), that is, in the case that the target object moves by 1.94 mm, the detection device can also detect the distance moved by the target object.
In the related art, a laser projection apparatus may include a pyroelectric sensor and a control circuit. When a human body in the sensing range of the pyroelectric sensor moves, the pyroelectric sensor can detect infrared signals radiated by the human body and amplify the received infrared signals. And then the amplified infrared signal is converted into an electric signal and sent to a control circuit. When the control circuit determines that the electric signal is larger than the signal threshold, the brightness of the projection screen can be reduced, and therefore damage to human eyes caused by laser emitted by the laser projection equipment is reduced. However, the pyroelectric sensor can only detect infrared signals radiated by a human body when the human body moves, so that the reliability of human body detection is low, and the safety of human eye protection is low.
In the embodiment of the disclosure, the laser projection device may determine the position of the target object according to the detection signal reflected by the target object, and adjust the brightness of the projection image according to the threshold detection range where the position is located, thereby improving the flexibility of eye protection.
Table 2 shows the performance parameters and the usage requirements of the pyroelectric sensor and the detection device. As can be seen from table 2, the performance of the detection device is superior to that of the pyroelectric sensor. For example, as shown in table 2, the activation time period of the pyroelectric sensor is 14s, and the activation time period of the detection device is 1 s. It can be seen that the activation time period of the detection device is shorter than the activation time period of the pyroelectric sensor. And the pyroelectric sensor cannot detect a stationary person, and the detection device can detect a stationary person.
TABLE 2
Referring to fig. 9, the display panel 50 may include a main control circuit 501, a display driving circuit 502, and a first memory 503. The light source driving circuit 80 is connected to the main control circuit 501 and the display driving circuit 502, respectively. The first memory 503 is connected to the display driving circuit 502, and the first memory 503 is used for storing the primary color gradation values of the pixels in the projection picture. The display driving circuit 502 is further configured to obtain the stored primary color level values of the pixels in the projection image from the first memory 503, and control the light valve to turn over according to the primary color level values of the pixels in the projection image, so as to project and display the projection image on the display screen.
It is assumed that the laser light source 30 includes a red laser, a green laser, a blue laser, and a yellow laser. The display driving circuit 502 may output a red PWM signal R _ PWM corresponding to a red laser based on a red primary color component of a projection screen, a green PWM signal G _ PWM corresponding to a green laser based on a green primary color component of the projection screen, a blue PWM signal B _ PWM corresponding to a blue laser based on a blue primary color component of the projection screen, and a yellow PWM signal Y _ PWM corresponding to a yellow laser based on a yellow primary color component of the projection screen. The display driving circuit 502 may output the enable signal R _ EN corresponding to the red laser through the main control circuit 501 based on the lighting time of the red laser in the driving period. Based on the lighting time period of the green laser in the driving period, the enable signal G _ EN corresponding to the green laser is output through the main control circuit 501. Based on the lighting time period of the blue laser in the drive period, the enable signal B _ EN corresponding to the blue laser is output through the main control circuit 501. Based on the lighting time period of the yellow laser in the driving period, the enable signal Y _ EN corresponding to the yellow laser is output through the main control circuit 501.
Referring to fig. 9, the main board 40 may include a slave component 401, a second memory 402, and a power amplifier component 403. The laser projection device may also include a speaker 92. The slave control module 401 is connected to a power amplifier module 403 and a second memory 402, respectively, and the power amplifier module 403 is further connected to the speaker 92. The second memory 402 is used for storing a projection picture to be projected and displayed. The slave control module 401 is configured to obtain a projection picture from the second memory 403 and transmit the projection picture to the display driving circuit 502. The power amplifier module 403 is used for amplifying the audio signal sent from the control module 401 and driving the speaker 92 to play audio.
To sum up, the embodiment of the present disclosure provides a laser projection device, where when it is determined that a current eye protection mode is different from a target eye protection mode corresponding to an application scene of the laser projection device, the laser projection device may switch the eye protection mode to the target eye protection mode. Therefore, the eye protection mode of the laser projection equipment can be flexibly adjusted according to the application scene of the laser projection equipment, the flexibility of switching the eye protection modes is improved, the reliability of eye protection is improved, and the damage of laser beams emitted by the laser projection equipment to eyes is effectively avoided.
An embodiment of the present disclosure provides a laser projection apparatus, including: a memory, a processor and a computer program stored on the memory, the processor implementing the above-mentioned method embodiments (e.g. the embodiments shown in fig. 2 or fig. 3) when executing the computer program.
Embodiments of the present disclosure provide a computer-readable storage medium having stored therein instructions, which are loaded and executed by a processor to implement the above-described method embodiments (e.g., the embodiments shown in fig. 2 or fig. 3).
The embodiments of the present disclosure provide a computer program product containing instructions, which when run on a computer, cause the computer to perform the above-described method embodiments (e.g., the embodiments shown in fig. 2 or fig. 3).
In the disclosed embodiments, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "and/or" in the embodiments of the present disclosure is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. 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 (8)
1. A method of controlling a laser projection apparatus, the method comprising:
determining an application scene of the laser projection equipment, wherein the application scene of the laser projection equipment comprises a social scene and a viewing scene;
determining a target eye protection mode corresponding to the application scene;
if the current eye protection mode of the laser projection equipment is different from the target eye protection mode, switching the eye protection mode of the laser projection equipment into the target eye protection mode;
the determining the application scene of the laser projection device comprises:
receiving a detection signal of a target object in front of or at the side of the laser projection equipment, wherein the detection signal is used for representing the posture of the target object;
determining an application scene of the laser projection equipment according to the posture of the target object;
the target pose includes one or more of the following poses:
Gestures that move a distance greater than a distance threshold;
moving gestures with a frequency greater than a first frequency threshold;
the swing amplitude is greater than the amplitude threshold value;
an attitude at a wobble frequency greater than a second frequency threshold;
wherein the target gesture is a fixed gesture pre-stored in the laser projection device.
2. The method of claim 1, wherein if the number of target objects is one; determining an application scenario of the laser projection device according to the posture of the target object, including:
if the posture of the target object is the target posture, determining that an application scene of the laser projection equipment is a social scene;
and if the posture of the target object is not the target posture, determining that the application scene of the laser projection equipment is a viewing scene.
3. The method of claim 1, wherein the number of target objects is plural; determining an application scenario of the laser projection device according to the posture of the target object, including:
if the gesture of the target object with the shortest distance to the laser projection equipment in the plurality of target objects is a target gesture, determining that an application scene of the laser projection equipment is a social scene;
And if the postures of the target objects are not the target postures, determining that the application scene of the laser projection equipment is a film watching scene.
4. The method of claim 1, wherein determining the application scenario of the laser projection device comprises:
and determining the application scene of the laser projection equipment according to the type of the currently running application program of the laser projection equipment.
5. The method of any of claims 1 to 3, wherein the eye protection mode of the laser projection device comprises a social mode and a viewing mode; the method further comprises the following steps:
if the eye protection mode of the laser projection equipment is the social mode, detecting whether a target object in front of or at the side of the laser projection equipment is located in a recommended area;
and if the target object is not located in the recommendation area, displaying a prompt picture on a projection picture, wherein the prompt picture is used for prompting that the target object moves to the recommendation area.
6. The method of claim 5, further comprising:
determining the recommendation area according to the height of the target object, wherein the distance between the recommendation area and the laser projection equipment is positively correlated with the height of the target object.
7. The method of claim 5, further comprising:
and if the human eye protection mode of the laser projection equipment is the film watching mode and the target object in front of or at the side of the laser projection equipment is positioned in the human eye protection range, changing the display of the projection picture.
8. A laser projection device, wherein the laser projection device is configured to:
determining an application scene of the laser projection equipment, wherein the application scene of the laser projection equipment comprises a social scene and a viewing scene;
determining a target human eye protection mode corresponding to the application scene;
if the current eye protection mode of the laser projection equipment is different from the target eye protection mode, switching the eye protection mode of the laser projection equipment into the target eye protection mode;
the determining the application scene of the laser projection device comprises:
receiving a detection signal of a target object in front of or at the side of the laser projection equipment, wherein the detection signal is used for representing the posture of the target object;
determining an application scene of the laser projection equipment according to the posture of the target object;
The target pose includes one or more of the following poses:
gestures where the distance of movement is greater than a distance threshold;
moving an attitude having a frequency greater than a first frequency threshold;
an attitude at which the swing amplitude is greater than an amplitude threshold;
an attitude at a wobble frequency greater than a second frequency threshold;
wherein the target gesture is a fixed gesture pre-stored in the laser projection device.
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| CN114019756A (en) * | 2020-07-28 | 2022-02-08 | 青岛海信激光显示股份有限公司 | Laser projection equipment and human eye protection method |
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| DE102011081008A1 (en) * | 2011-08-16 | 2013-02-21 | Robert Bosch Gmbh | Laser projection device and method |
| CN104916271A (en) * | 2015-07-10 | 2015-09-16 | 北京京东方多媒体科技有限公司 | Display device capable of adjusting subject patterns automatically, television and control method for display device |
| CN105630163A (en) * | 2015-12-21 | 2016-06-01 | 惠州Tcl移动通信有限公司 | Eye protection method for intelligent terminal and intelligent terminal |
| EP3485314A4 (en) * | 2016-07-16 | 2020-02-19 | Ideal Perceptions Llc | Interactive projection system |
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| CN109995942B (en) * | 2019-03-28 | 2021-03-30 | 中国医学科学院生物医学工程研究所 | Eye protection method and system for intelligent terminal |
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