CN108281100B - Laser projector control method, laser projector control device and laser projector - Google Patents
Laser projector control method, laser projector control device and laser projector Download PDFInfo
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- CN108281100B CN108281100B CN201810040128.9A CN201810040128A CN108281100B CN 108281100 B CN108281100 B CN 108281100B CN 201810040128 A CN201810040128 A CN 201810040128A CN 108281100 B CN108281100 B CN 108281100B
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
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Abstract
The application discloses laser projector control method, equipment and laser projector, including: determining a laser projection area corresponding to an imaging laser of the laser projector; emitting infrared laser to the laser projection area through an infrared laser emitter; based on the infrared reflection signal of the infrared laser, when the light intensity change is determined to exist, a closing instruction aiming at the imaging laser is generated; and executing the closing instruction to control the imaging laser to stop emitting the imaging laser. The embodiment of the application improves the safety of the laser projector.
Description
Technical Field
The application belongs to the technical field of intelligent control, and particularly relates to a laser projector control method, laser projector control equipment and a laser projector.
Background
A laser projector is an electronic device that projects a laser beam emitted from a laser emitter onto a projection device to project a picture on the projection device. The projection device refers to a projection screen, a wall surface, and the like capable of displaying images or video files.
The laser projector and the projection device have a certain projection distance, and the area between the laser projector and the projection device forms a laser projection area. In the laser projector, when the user walks into the laser projection area during projection, laser light is projected onto the user's body, especially when the human face is opposite to the laser light emitted by the laser projector, and the laser light beam is projected onto the user's eyes.
If the laser beam is projected to human eyes, retina is irradiated by laser with higher intensity in a shorter time, the laser beam can be accumulated in the human eyes and converted into heat energy to damage protein cells of the human eyes, and therefore, the human eyes are damaged by the irradiation of the laser beam, and the safety of the laser projector is low.
Disclosure of Invention
In view of this, the present application provides a method and an apparatus for controlling a laser projector, and a laser projector, so as to solve the technical problem that a laser projector has a potential safety hazard in the prior art.
In order to solve the above technical problem, a first aspect of the present application provides a laser projector control method, the method including:
determining a laser projection area corresponding to an imaging laser of the laser projector;
emitting infrared laser to the laser projection area through an infrared laser emitter;
based on the infrared reflection signal of the infrared laser, when the light intensity change is determined to exist, a closing instruction aiming at the imaging laser is generated;
and executing the closing instruction to control the imaging laser to stop emitting the imaging laser.
Preferably, after executing the shutdown instruction to control the imaging laser to stop emitting imaging laser light, the method further includes:
determining that no light intensity change exists based on an infrared reflection signal of the infrared laser, and generating a projection instruction for the imaging laser;
and executing the projection instruction to control the imaging laser to re-emit the imaging laser.
Preferably, when it is determined that there is a light intensity change based on the infrared reflection signal of the infrared laser, generating a turn-off instruction for the imaging laser includes:
determining first light intensity information of the infrared laser emitted by the infrared laser emitter;
receiving an infrared reflection signal of the infrared laser through an infrared receiver;
determining second light intensity information of the infrared reflection signal;
and if the difference between the first light intensity information and the second light intensity information meets a first preset condition, determining that light intensity change exists, and generating a closing instruction aiming at the imaging laser.
A second aspect of the present application provides a laser projector control apparatus comprising, a storage component, a processing component coupled to the storage component, an infrared laser emitter coupled to the processor; the infrared laser transmitter is used for transmitting infrared laser;
wherein the storage component comprises one or more memories and the processing component comprises one or more processors; the one or more memories are to store one or more computer instructions for execution invoked by the processing component;
the processing component is to:
determining a laser projection area corresponding to an imaging laser of the laser projector;
emitting infrared laser to the laser projection area through an infrared laser emitter;
based on the infrared reflection signal of the infrared laser transmitter, when the light intensity change is determined to exist, a closing instruction aiming at the imaging laser is generated;
and executing the closing instruction to control the imaging laser to stop emitting the imaging laser.
Preferably, the processing component is further configured to:
determining that no light intensity change exists based on an infrared reflection signal of the infrared laser, and generating a projection instruction for the imaging laser;
and executing the projection instruction to control the imaging laser to re-emit the imaging laser.
Preferably, the apparatus further comprises: an infrared laser receiver connected with the processing assembly; the processing component determines that a light intensity change exists based on the reflected signal of the infrared laser, and specifically, the step of generating a closing instruction for the imaging laser comprises the following steps:
determining first light intensity information of the infrared laser emitted by the infrared laser emitter;
receiving an infrared reflection signal of the infrared laser by the infrared receiver; determining second light intensity information of the infrared reflection signal;
and if the difference between the first light intensity information and the second light intensity information meets a first preset condition, determining that light intensity change exists, and generating a closing instruction aiming at the imaging laser.
A third aspect of the present application provides a laser projector comprising: the device comprises an imaging laser, an infrared laser transmitter, a processing assembly and a storage assembly connected with the processing assembly; the processing components include one or more processors, the storage components include one or more memories;
the storage component is used for storing one or more computer instructions, wherein the one or more computer instructions are used for the processing component to call and execute;
the imaging laser is used for emitting imaging laser; the infrared laser transmitter is used for transmitting infrared laser;
the processing component is to:
determining a laser projection area corresponding to an imaging laser of the laser projector;
emitting infrared laser to the laser projection area through an infrared laser emitter;
based on the infrared reflection signal of the infrared laser, when the light intensity change is determined to exist, a closing instruction aiming at the imaging laser is generated;
and executing the closing instruction to control the imaging laser to stop emitting the imaging laser.
Preferably, the processing component is further specifically configured to:
generating a projection instruction aiming at the imaging laser when determining that no light intensity change exists based on the infrared reflection signal of the infrared laser;
and executing the projection instruction to control the imaging laser to re-emit the imaging laser.
Preferably, the projector further includes: and the processing assembly determines that a closing instruction aiming at the imaging laser device is generated when the light intensity change exists based on the infrared reflection signal of the infrared laser, and specifically comprises the following steps:
determining first light intensity information of the infrared laser emitted by the infrared laser emitter;
receiving an infrared reflection signal of the infrared laser through an infrared receiver;
determining second light intensity information of the infrared reflection signal;
and if the difference between the first light intensity information and the second light intensity information meets a first preset condition, determining that light intensity change exists, and generating a closing instruction aiming at the imaging laser.
In this embodiment of the application, after the infrared laser emitter emits the infrared laser to the projection area, an infrared reflection signal of the infrared laser may be detected to determine whether there is a light intensity change, if so, a turn-off instruction for the laser projector may be generated, and after the turn-off instruction is executed, the laser projector may be controlled to stop emitting the imaging laser. After the laser projector stops emitting imaging laser, no laser is emitted to the laser projection area, and then no laser is emitted to human eyes. By cutting off the laser emission, the potential safety hazard of the laser projector is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a flowchart of an embodiment of a laser projector control method of an embodiment of the present application;
fig. 2 is a flowchart of yet another embodiment of a laser projector control method of an embodiment of the present application;
fig. 3 is a schematic structural diagram of an embodiment of a laser projector control apparatus according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of still another embodiment of a laser projector control apparatus according to an embodiment of the present application;
FIG. 5 is a schematic block diagram of an embodiment of a laser projector according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of another embodiment of a laser projector according to an embodiment of the present application.
Detailed Description
Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.
The embodiment of the application is mainly applied to laser equipment such as a laser projector, and the laser emission is cut off through detection of target objects such as human eyes, so that the damage of laser to a human body caused by the characteristics of the laser is avoided, and the safety of the laser projector is improved.
The existing laser projector mainly uses a laser emitter to emit laser with three colors of RGB, and then projects the laser onto a projection device. The projection device may display a picture projected by the laser projector. However, a certain projection distance exists between the laser and the laser projector, and a laser projection area is formed, and the laser is transmitted in the laser projection area until the laser is projected on the projection device. When a person enters the laser projection area, the laser light has irreversible damage to the human eye. However, the conventional laser projector does not have a protection mechanism to prevent the laser projector from causing possible damage to the human body. The inventors thought whether a protection mechanism could be added to the laser projector to improve the safety of the laser projector. The inventor has studied and sent that a human face generally has heat radiation and human eyes have special characteristics of not reflecting light, and therefore, the inventor thinks whether the laser projector can be controlled according to certain special characteristics of judging the human eyes or human bodies, and accordingly, the inventor proposes the technical scheme of the application.
In the embodiment of the present application, a shutdown instruction for the laser projector is generated according to a target object in a laser projection region of the laser projector by detecting the target object. After executing the turn-off instruction, the laser projector may be controlled to stop emitting imaging laser light. After the emission of the imaging laser is stopped, the laser does not hurt human eyes any more, and the safety of the laser projector can be improved.
The technical solutions of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a flowchart of an embodiment of a method for controlling a laser projector according to an embodiment of the present application may include the following steps:
101: and determining a laser projection area corresponding to the imaging laser of the laser projector.
And after the imaging laser is transmitted in the laser projection area, a projection image is formed on the projection device. The laser projector may be provided with an imaging laser, and when the imaging laser emits imaging laser, the imaging laser may be formed on a projection device, and a region between the imaging laser in the laser projector and the projection device constitutes the laser projection region. Typically, imaging laser light emitted by an imaging laser of the laser head projector is transmitted in the laser projection area and projected onto the projection device. Normally, no person or object is in the laser projection area, and when a person is present in the laser projection area, the person, especially the eyes of the person, may be injured.
The laser projector is used for emitting imaging laser by an RGB three-color laser emitter and projecting a color image to a projection device. The control method of the laser projector provided by the embodiment of the application can be applied to the laser projector, and can control the imaging laser of the laser projector to emit imaging laser; the control method of the laser projector may also be applied to a control device independent of the laser projector, which may control the imaging laser of the laser projector to emit imaging laser light.
102: and emitting infrared laser to the laser projection area through an infrared laser emitter.
The infrared laser light is transmitted in the laser projection area to form a laser image on the projection device. When the infrared laser is transmitted in the laser projection area, no object or person is usually present in the laser projection area, so that the picture projected by the laser projector can be normally displayed on a projection device.
103: and generating a closing instruction aiming at the imaging laser when determining that the light intensity changes based on the infrared reflection signal of the infrared laser.
Determining that the light intensity change exists based on the infrared reflection signal of the infrared laser can indicate whether the infrared reflection signal based on the infrared laser is different from the infrared laser signal support or not, and if the infrared reflection signal based on the infrared laser is different from the infrared laser signal support, the light intensity change can be indicated; the difference between the infrared reflection signal of the infrared laser and the infrared reflection signal of the preset time can be determined, and if the difference exists, the existence of the light intensity change can be indicated.
Since the user may walk into the laser projection area during the projection process of the laser projector, especially when the face of the user faces the laser projector, the laser emitted from the laser projector is usually projected onto the face of the user, causing harm to the eyes of the user. Therefore, the presence of human eyes in the laser projection area can be detected as a criterion for judging whether the imaging laser needs to be turned off.
Certainly, since the human eyes are usually located on the human face, when the light intensity change is determined to exist based on the infrared reflection signal of the infrared laser, before the closing instruction for the imaging laser is generated, whether a human face exists in the laser projection area can be detected, and when the human face exists in the laser projection area, whether the light intensity change exists between the infrared reflection signal and the infrared laser is detected.
When a human face is detected, and it is determined that there is a light intensity change based on the infrared reflection signal of the infrared laser, a turn-off instruction for the imaging laser is generated, so that the laser projector can be controlled, and the projection process of the laser projector can be controlled when the laser is projected to the eyes of a user, so that the damage of the laser to the eyes can be further avoided.
Optionally, the human face object in the laser projection area may include:
acquiring image data shot by a camera in real time aiming at the laser projection area;
a face object of the image data is identified.
The camera may be installed on the laser projector or the control device, and captures images in real time with respect to the laser projection area, obtaining captured image data. The camera shoots the laser projection area, and can shoot the laser projection area in real time. The face object in the image data can be identified by a face identification algorithm with respect to the image data obtained in real time. Alternatively, the face recognition algorithm may be a face recognition algorithm based on deep learning, an algorithm based on template matching, or the like.
The closing instruction may be generated upon detecting the presence of the target object in the laser projection area. The shut down instruction is primarily directed to an imaging laser of the laser projector. Optionally, a shutdown instruction for the imaging laser may be generated based on a control identification of the laser projector imaging laser.
104: and executing the closing instruction to control the imaging laser to stop emitting the imaging laser.
After executing the turn-off instruction, the laser projector may stop emitting imaging laser light.
Optionally, the infrared laser emitter emits light to the laser projection area, and the light can be projected as a laser image on a projection device. Objects such as people or objects are not usually present in the laser projection area so that the imaging laser light can be transmitted straight to form a projected image on a projection device. However, since there is usually no obstruction in the laser projection area, people can move freely in the laser projection area, and when people walk into the laser projection area, the laser may cause harm to people. The human eye, as a special imaging structure, cannot reflect light and has a light absorption effect. Therefore, the human eye can be used as a target object, and when the target object is detected to exist in the laser projection area, a corresponding turn-off instruction can be executed for the imaging laser of the laser projector.
Optionally, the executing the turn-off instruction to control the laser projector to stop emitting the imaging laser may include: executing the closing instruction to generate a stopping instruction; and sending the stop instruction to the imaging laser so that the imaging laser stops emitting imaging laser in response to the stop instruction.
Optionally, the executing the shutdown instruction to control the imaging laser to stop emitting the imaging laser may include: and executing the closing instruction to respond to the closing instruction and stop emitting the imaging laser.
Optionally, when the imaging laser stops emitting the imaging laser, other working modules in the laser projector may also be kept in the original working state, so that when the target object is not detected, the laser projector may be quickly restored to the normal projection state. In particular, the scanning module in the laser projector can keep the original working state unchanged so as to scan the imaging lasers of various colors emitted by the imaging laser of the laser projector at any time.
In the embodiment of the application, after the infrared laser emitter emits the infrared laser to the projection area, the infrared reflection signal of the infrared laser can be detected to determine whether the light intensity change exists, if so, a turn-off instruction for the laser projector can be generated, and when the turn-off instruction is executed, the laser projector can be controlled to stop emitting the imaging laser, and the laser projector stops emitting the imaging laser, so that the laser does not transmit in the laser projection area, the harm of the laser to a human body can be avoided, and the safety of the laser use is improved.
As shown in fig. 2, a flowchart of another embodiment of a laser control method provided in this embodiment of the present application may include the following steps:
201: and determining a laser projection area corresponding to the imaging laser of the laser projector.
202: and emitting infrared laser to the laser projection area through an infrared laser emitter.
203: and generating a closing instruction aiming at the imaging laser when determining that the light intensity changes based on the infrared reflection signal of the infrared laser.
204: and executing the closing instruction to control the imaging laser to stop emitting the imaging laser.
205: and determining that no light intensity change exists based on the infrared reflection signal of the infrared laser, and generating a projection instruction aiming at the imaging laser.
The projection instruction of the laser projector may be generated when there is no intensity variation between the infrared laser light signal reflected in the laser projection area and the infrared laser light.
The user can be in a moving state, when the user moves out of the laser projection area, whether the infrared laser reflection signal in the laser projection area has light intensity change or not can be detected in real time, and when the light intensity change is not detected, the user can be determined to be no longer in the laser projection area. At this time, the laser projector may re-emit the imaging laser projection image.
206: and executing the projection instruction to control the imaging laser to re-emit the imaging laser.
The laser projector can restart to emit the imaging laser under the control of the projection instruction when the laser projection area does not have the light intensity change of the infrared reflection signal and the infrared signal of the original infrared laser.
Optionally, when the imaging laser is controlled to stop emitting the imaging laser, the other working modules may keep the original working state, so that the laser projector may re-emit the imaging laser after executing the projection instruction.
In this embodiment of the application, when detecting that there is no light intensity change in the infrared reflection signal reflected in the laser projection area compared with the original infrared laser, a projection instruction for the laser projector may be generated, and the instruction is executed to control the imaging laser to stop emitting imaging laser. And when detecting that the infrared reflection signal reflected in the laser projection area has light intensity change compared with the original infrared laser, the imaging laser can continue to project, and the continuity of the working state of the imaging laser can be kept through the mode, so that the use process of the laser projector is safe and convenient.
As an embodiment, the determining that there is a light intensity change based on the infrared reflection signal of the infrared laser, and generating a turn-off instruction for the imaging laser may include:
determining first light intensity information of the infrared laser emitted by the infrared laser emitter;
receiving an infrared reflection signal of the infrared laser through an infrared receiver;
determining second light intensity information of the infrared reflection signal;
and if the difference between the first light intensity information and the second light intensity information meets a first preset condition, determining that light intensity change exists, and generating a closing instruction aiming at the imaging laser.
The infrared laser is emitted by an infrared laser emitter. The infrared laser light may be reflected on an impenetrable device such as a projection device, a human body, or the like. The infrared laser is different from the imaging laser. The imaging laser is a laser emitted by an imaging laser for projecting an image on a projection device. The infrared laser is emitted by an infrared laser emitter and is used for detecting whether light rays are shielded or absorbed in a laser projection area.
When the infrared laser is emitted to a user, the user can reflect the infrared laser, but some special parts of the user, such as human eyes, do not have a reflection function, so that the laser which is reflected by the laser projection device can be received by utilizing the non-reflection characteristic, the first light intensity information of the reflected infrared reflection signal is compared with the second light intensity information of the non-emitted infrared laser, and if the difference between the first light intensity information and the second light intensity information is larger, a target object exists in the laser area.
The first preset condition may be determined according to a relative area of the human eye to the infrared laser. Assuming that a projection area of the infrared laser projection is S, a general area of a human eye is S, a ratio of the area of the human eye to the projection area is calculated as D, and assuming that first light intensity information of the infrared laser is Q1, a light intensity threshold may be D × Q1, and the first preset condition may be that a difference between the first light intensity information Q1 and the second light intensity information Q2 is greater than the light intensity threshold D × Q1.
As a possible implementation manner, the determining the first light intensity information of the infrared laser light emitted by the infrared laser emitter may include:
and when the human face exists in the laser projection area, emitting infrared laser through an infrared emitter, and determining first light intensity information of the infrared laser.
The human eyes are located on a human face, and when a human face is detected, the human eyes on the human face can be generally determined. Therefore, in order to make the detection process of the light intensity variation more accurate, the human face in the laser projection area can be detected after the human face in the laser projection area is detected.
Aiming at the light absorption effect of human eyes, when a person enters a laser projection area, the existence of laser projection equipment in the laser projection area can be judged according to the light intensity difference between a reflected infrared signal and the original infrared laser which is not projected. By the aid of the judging method, whether the target exists can be judged through the characteristics of the object, the pertinence of the judging process can be stronger, and the accuracy is higher.
In the embodiment of the application, when a person enters a laser projection area, the existence of laser projection equipment in the laser projection area is judged according to the light intensity difference between a reflected infrared signal and original infrared laser which is not projected. After whether the target object exists or not is accurately judged, a protection mechanism with higher safety can be provided for the target object.
As shown in fig. 3, which is a schematic structural diagram of an embodiment of a laser projector control apparatus according to an embodiment of the present application, the apparatus may include a storage component 302, a processing component 301 connected to the storage component; the infrared laser transmitter 303 is connected with the processor, and the infrared laser transmitter 303 is used for transmitting infrared laser;
wherein the storage component 302 is composed of one or more processors, and the processing component 301 is composed of one or more processors; the one or more processors are configured to store one or more computer instructions for invoking execution by the processing component 301;
the processing component 301 is configured to:
determining a laser projection area corresponding to an imaging laser of the laser projector;
emitting infrared laser to the laser projection area through an infrared laser emitter;
based on the infrared reflection signal of the infrared laser transmitter, when the light intensity change is determined to exist, a closing instruction aiming at the imaging laser is generated;
and executing the closing instruction to control the imaging laser to stop emitting the imaging laser.
And after the imaging laser is transmitted in the laser projection area, a projection image is formed on the projection device. The laser projector may be provided with an imaging laser, and when the imaging laser emits imaging laser, the imaging laser may be formed on a projection device, and a region between the imaging laser in the laser projector and the projection device constitutes the laser projection region. Typically, imaging laser light emitted by an imaging laser of the laser head projector is transmitted in the laser projection area and projected onto the projection device. Normally, no person or object is in the laser projection area, and when a person is present in the laser projection area, the person, especially the eyes of the person, may be injured.
The laser projector is used for emitting imaging laser by an RGB three-color laser emitter and projecting a color image to a projection device. An imaging laser of the laser projector emits imaging laser light.
The infrared laser light is transmitted in the laser projection area to form a laser image on the projection device. When the infrared laser is transmitted in the laser projection area, no object or person is usually present in the laser projection area, so that the picture projected by the laser projector can be normally displayed on a projection device.
Determining that the light intensity change exists based on the infrared reflection signal of the infrared laser can indicate whether the infrared reflection signal based on the infrared laser is different from the infrared laser signal support or not, and if the infrared reflection signal based on the infrared laser is different from the infrared laser signal support, the light intensity change can be indicated; the difference between the infrared reflection signal of the infrared laser and the infrared reflection signal of the preset time can be determined, and if the difference exists, the existence of the light intensity change can be indicated.
Since the user may walk into the laser projection area during the projection process of the laser projector, especially when the face of the user faces the laser projector, the laser emitted from the laser projector is usually projected onto the face of the user, causing harm to the eyes of the user. Therefore, the presence of human eyes in the laser projection area can be detected as a criterion for judging whether the imaging laser needs to be turned off.
Certainly, since the human eyes are usually located on the human face, when the light intensity change is determined to exist based on the infrared reflection signal of the infrared laser, before the closing instruction for the imaging laser is generated, whether a human face exists in the laser projection area can be detected, and when the human face exists in the laser projection area, whether the light intensity change exists between the infrared reflection signal and the infrared laser is detected.
When a human face is detected, and it is determined that there is a light intensity change based on the infrared reflection signal of the infrared laser, a turn-off instruction for the imaging laser is generated, so that the laser projector can be controlled, and the projection process of the laser projector can be controlled when the laser is projected to the eyes of a user, so that the damage of the laser to the eyes can be further avoided.
Optionally, the determining, by the processing component, the human face object in the laser projection area may specifically be:
acquiring image data shot by a camera in real time aiming at the laser projection area;
a face object of the image data is identified.
The camera may be installed on the laser projector or the control device, and captures images in real time with respect to the laser projection area, obtaining captured image data. The camera shoots the laser projection area, and can shoot the laser projection area in real time. The face object in the image data can be identified by a face identification algorithm with respect to the image data obtained in real time. Alternatively, the face recognition algorithm may be a face recognition algorithm based on deep learning, an algorithm based on template matching, or the like.
The closing instruction may be generated upon detecting the presence of the target object in the laser projection area. The shut down instruction is primarily directed to an imaging laser of the laser projector. Optionally, a shutdown instruction for the imaging laser may be generated based on a control identification of the laser projector imaging laser.
After executing the turn-off instruction, the laser projector may stop emitting imaging laser light.
Optionally, the infrared laser emitter emits light to the laser projection area, and the light can be projected as a laser image on a projection device. Objects such as people or objects are not usually present in the laser projection area so that the imaging laser light can be transmitted straight to form a projected image on a projection device. However, since there is usually no obstruction in the laser projection area, people can move freely in the laser projection area, and when people walk into the laser projection area, the laser may cause harm to people. The human eye, as a special imaging structure, cannot reflect light and has a light absorption effect. Therefore, the human eye can be used as a target object, and when the target object is detected to exist in the laser projection area, a corresponding turn-off instruction can be executed for the imaging laser of the laser projector.
Optionally, the executing, by the processing component, the closing instruction to control the laser projector to stop emitting the imaging laser may specifically be: executing the closing instruction to generate a stopping instruction; and sending the stop instruction to the imaging laser so that the imaging laser stops emitting imaging laser in response to the stop instruction.
Optionally, the step of executing the closing instruction by the processing component to control the imaging laser to stop emitting the imaging laser may specifically be: and executing the closing instruction to respond to the closing instruction and stop emitting the imaging laser.
Optionally, when the imaging laser stops emitting the imaging laser, other working modules in the laser projector may also be kept in the original working state, so that when the target object is not detected, the laser projector may be quickly restored to the normal projection state. In particular, the scanning module in the laser projector can keep the original working state unchanged so as to scan the imaging lasers of various colors emitted by the imaging laser of the laser projector at any time.
In the embodiment of the application, after the infrared laser emitter emits the infrared laser to the projection area, the infrared reflection signal of the infrared laser can be detected to determine whether the light intensity change exists, if so, a turn-off instruction for the laser projector can be generated, and when the turn-off instruction is executed, the laser projector can be controlled to stop emitting the imaging laser, and the laser projector stops emitting the imaging laser, so that the laser does not transmit in the laser projection area, the harm of the laser to a human body can be avoided, and the safety of the laser use is improved.
As an embodiment, the processing component may be further to:
determining that no light intensity change exists based on an infrared reflection signal of the infrared laser, and generating a projection instruction for the imaging laser;
and executing the projection instruction to control the imaging laser to re-emit the imaging laser.
The projection instruction of the laser projector may be generated when there is no intensity variation between the infrared laser light signal reflected in the laser projection area and the infrared laser light.
The user can be in a moving state, when the user moves out of the laser projection area, whether the infrared laser reflection signal in the laser projection area has light intensity change or not can be detected in real time, and when the light intensity change is not detected, the user can be determined to be no longer in the laser projection area. At this time, the laser projector may re-emit the imaging laser projection image.
The laser projector can restart to emit the imaging laser under the control of the projection instruction when the laser projection area does not have the light intensity change of the infrared reflection signal and the infrared signal of the original infrared laser.
Optionally, when the imaging laser is controlled to stop emitting the imaging laser, the other working modules may keep the original working state, so that the laser projector may re-emit the imaging laser after executing the projection instruction.
In this embodiment of the application, when detecting that there is no light intensity change in the infrared reflection signal reflected in the laser projection area compared with the original infrared laser, a projection instruction for the laser projector may be generated, and the instruction is executed to control the imaging laser to stop emitting imaging laser. And when detecting that the infrared reflection signal reflected in the laser projection area has light intensity change compared with the original infrared laser, the imaging laser can continue to project, and the continuity of the working state of the imaging laser can be kept through the mode, so that the use process of the laser projector is safe and convenient.
As still another embodiment, as shown in fig. 4, the laser projector control apparatus may further include: the infrared laser receiver 401, when the processing component determines that there is a light intensity change based on the reflected signal of the infrared laser, the step of generating the turn-off instruction for the imaging laser may specifically be:
determining first light intensity information of the infrared laser emitted by the infrared laser emitter;
receiving an infrared reflection signal of the infrared laser by the infrared receiver 401; determining second light intensity information of the infrared reflection signal;
and if the difference between the first light intensity information and the second light intensity information meets a first preset condition, determining that light intensity change exists, and generating a closing instruction aiming at the imaging laser.
The infrared laser is emitted by an infrared laser emitter. The infrared laser light may be reflected on an impenetrable device such as a projection device, a human body, or the like. The infrared laser is different from the imaging laser. The imaging laser is a laser emitted by an imaging laser for projecting an image on a projection device. The infrared laser is emitted by an infrared laser emitter and is used for detecting whether light rays are shielded or absorbed in a laser projection area.
When the infrared laser is emitted to a user, the user can reflect the infrared laser, but some special parts of the user, such as human eyes, do not have a reflection function, so that the laser which is reflected by the laser projection device can be received by utilizing the non-reflection characteristic, the first light intensity information of the reflected infrared reflection signal is compared with the second light intensity information of the non-emitted infrared laser, and if the difference between the first light intensity information and the second light intensity information is larger, a target object exists in the laser area.
The first preset condition may be determined according to a relative area of the human eye to the infrared laser. Assuming that a projection area of the infrared laser projection is S, a general area of a human eye is S, a ratio of the area of the human eye to the projection area is calculated as D, and assuming that first light intensity information of the infrared laser is Q1, a light intensity threshold may be D × Q1, and the first preset condition may be that a difference between the first light intensity information Q1 and the second light intensity information Q2 is greater than the light intensity threshold D × Q1.
As a possible implementation manner, the determining, by the processing component, first light intensity information of the infrared laser light emitted by the infrared laser emitter may specifically be:
when the human face detection assembly detects that a human face exists in the laser projection area, infrared laser is emitted through an infrared emitter, and first light intensity information of the infrared laser is determined.
The human eyes are located on a human face, and when a human face is detected, the human eyes on the human face can be generally determined. Therefore, in order to make the detection process of the light intensity variation more accurate, the human face in the laser projection area can be detected after the human face in the laser projection area is detected.
Aiming at the light absorption effect of human eyes, when a person enters a laser projection area, the existence of laser projection equipment in the laser projection area can be judged according to the light intensity difference between a reflected infrared signal and the original infrared laser which is not projected.
In the embodiment of the application, when a person enters a laser projection area, the existence of laser projection equipment in the laser projection area is judged according to the light intensity difference between a reflected infrared signal and original infrared laser which is not projected. By the aid of the judging method, whether the target exists can be judged through the characteristics of the object, the pertinence of the judging process can be stronger, and the accuracy is higher. After whether the target object exists or not is accurately judged, a protection mechanism with higher safety can be provided for the target object.
As shown in fig. 5, which is a schematic structural diagram of an embodiment of a laser projector according to an embodiment of the present disclosure, the laser projector may include: an imaging laser 501 and an infrared laser transmitter 502, a processing component 503 and a storage component 504 connected to the processing component 503; the processing components include one or more processors, the storage components include one or more memories;
the storage component 504 is configured to store one or more computer instructions, wherein the one or more computer instructions are invoked for execution by the processing component;
the imaging laser 501 is used for emitting imaging laser; the infrared laser transmitter 502 is used for transmitting infrared laser;
the processing component 503 is configured to:
determining a laser projection area corresponding to an imaging laser of the laser projector;
emitting infrared laser to the laser projection area through an infrared laser emitter;
based on the infrared reflection signal of the infrared laser, when the light intensity change is determined to exist, a closing instruction aiming at the imaging laser is generated;
and executing the closing instruction to control the imaging laser to stop emitting the imaging laser.
The imaging laser 501 is used to emit imaging laser light to form a projected image on a projection device.
Optionally, the infrared laser transmitter may be connected to the processing assembly to emit infrared laser under the control of the processing assembly to form an infrared projection on the projection device.
And after the imaging laser is transmitted in the laser projection area, a projection image is formed on the projection device. The laser projector may be provided with an imaging laser, and when the imaging laser emits imaging laser, the imaging laser may be formed on a projection device, and a region between the imaging laser in the laser projector and the projection device constitutes the laser projection region. Typically, imaging laser light emitted by an imaging laser of the laser head projector is transmitted in the laser projection area and projected onto the projection device. Normally, no person or object is in the laser projection area, and when a person is present in the laser projection area, the person, especially the eyes of the person, may be injured.
The laser projector is used for emitting imaging laser by an RGB three-color laser emitter and projecting a color image to a projection device. An imaging laser of the laser projector emits imaging laser light.
The infrared laser light is transmitted in the laser projection area to form a laser image on the projection device. When the infrared laser is transmitted in the laser projection area, no object or person is usually present in the laser projection area, so that the picture projected by the laser projector can be normally displayed on a projection device.
Determining that the light intensity change exists based on the infrared reflection signal of the infrared laser can indicate whether the infrared reflection signal based on the infrared laser is different from the infrared laser signal support or not, and if the infrared reflection signal based on the infrared laser is different from the infrared laser signal support, the light intensity change can be indicated; the difference between the infrared reflection signal of the infrared laser and the infrared reflection signal of the preset time can be determined, and if the difference exists, the existence of the light intensity change can be indicated.
Since the user may walk into the laser projection area during the projection process of the laser projector, especially when the face of the user faces the laser projector, the laser emitted from the laser projector is usually projected onto the face of the user, causing harm to the eyes of the user. Therefore, the presence of human eyes in the laser projection area can be detected as a criterion for judging whether the imaging laser needs to be turned off.
Certainly, since the human eyes are usually located on the human face, when the light intensity change is determined to exist based on the infrared reflection signal of the infrared laser, before the closing instruction for the imaging laser is generated, whether a human face exists in the laser projection area can be detected, and when the human face exists in the laser projection area, whether the light intensity change exists between the infrared reflection signal and the infrared laser is detected.
When a human face is detected, and it is determined that there is a light intensity change based on the infrared reflection signal of the infrared laser, a turn-off instruction for the imaging laser is generated, so that the laser projector can be controlled, and the projection process of the laser projector can be controlled when the laser is projected to the eyes of a user, so that the damage of the laser to the eyes can be further avoided.
Optionally, the determining, by the processing component, the human face object in the laser projection area may specifically be:
acquiring image data shot by a camera in real time aiming at the laser projection area;
a face object of the image data is identified.
The camera may be installed on the laser projector or the control device, and captures images in real time with respect to the laser projection area, obtaining captured image data. The camera shoots the laser projection area, and can shoot the laser projection area in real time. The face object in the image data can be identified by a face identification algorithm with respect to the image data obtained in real time. Alternatively, the face recognition algorithm may be a face recognition algorithm based on deep learning, an algorithm based on template matching, or the like.
The closing instruction may be generated upon detecting the presence of the target object in the laser projection area. The shut down instruction is primarily directed to an imaging laser of the laser projector. Optionally, a shutdown instruction for the imaging laser may be generated based on a control identification of the laser projector imaging laser.
After executing the turn-off instruction, the laser projector may stop emitting imaging laser light.
Optionally, the infrared laser emitter emits light to the laser projection area, and the light can be projected as a laser image on a projection device. Objects such as people or objects are not usually present in the laser projection area so that the imaging laser light can be transmitted straight to form a projected image on a projection device. However, since there is usually no obstruction in the laser projection area, people can move freely in the laser projection area, and when people walk into the laser projection area, the laser may cause harm to people. The human eye, as a special imaging structure, cannot reflect light and has a light absorption effect. Therefore, the human eye can be used as a target object, and when the target object is detected to exist in the laser projection area, a corresponding turn-off instruction can be executed for the imaging laser of the laser projector.
Optionally, the executing, by the processing component, the closing instruction to control the laser projector to stop emitting the imaging laser may specifically be: executing the closing instruction to generate a stopping instruction; and sending the stop instruction to the imaging laser so that the imaging laser stops emitting imaging laser in response to the stop instruction.
Optionally, the step of executing the closing instruction by the processing component to control the imaging laser to stop emitting the imaging laser may specifically be: and executing the closing instruction to respond to the closing instruction and stop emitting the imaging laser.
Optionally, when the imaging laser stops emitting the imaging laser, other working modules in the laser projector may also be kept in the original working state, so that when the target object is not detected, the laser projector may be quickly restored to the normal projection state. In particular, the scanning module in the laser projector can keep the original working state unchanged so as to scan the imaging lasers of various colors emitted by the imaging laser of the laser projector at any time.
In the embodiment of the application, after the infrared laser emitter emits the infrared laser to the projection area, the infrared reflection signal of the infrared laser can be detected to determine whether the light intensity change exists, if so, a turn-off instruction for the laser projector can be generated, and when the turn-off instruction is executed, the laser projector can be controlled to stop emitting the imaging laser, and the laser projector stops emitting the imaging laser, so that the laser does not transmit in the laser projection area, the harm of the laser to a human body can be avoided, and the safety of the laser use is improved.
As an embodiment, the processing component is further specifically configured to:
generating a projection instruction aiming at the imaging laser when determining that no light intensity change exists based on the infrared reflection signal of the infrared laser;
and executing the projection instruction to control the imaging laser to re-emit the imaging laser.
The projection instruction of the laser projector may be generated when there is no intensity variation between the infrared laser light signal reflected in the laser projection area and the infrared laser light.
The user can be in a moving state, when the user moves out of the laser projection area, whether the infrared laser reflection signal in the laser projection area has light intensity change or not can be detected in real time, and when the light intensity change is not detected, the user can be determined to be no longer in the laser projection area. At this time, the laser projector may re-emit the imaging laser projection image.
The laser projector can restart to emit the imaging laser under the control of the projection instruction when the laser projection area does not have the light intensity change of the infrared reflection signal and the infrared signal of the original infrared laser.
Optionally, when the imaging laser is controlled to stop emitting the imaging laser, the other working modules may keep the original working state, so that the laser projector may re-emit the imaging laser after executing the projection instruction.
In this embodiment of the application, when detecting that there is no light intensity change in the infrared reflection signal reflected in the laser projection area compared with the original infrared laser, a projection instruction for the laser projector may be generated, and the instruction is executed to control the imaging laser to stop emitting imaging laser. And when detecting that the infrared reflection signal reflected in the laser projection area has light intensity change compared with the original infrared laser, the imaging laser can continue to project, and the continuity of the working state of the imaging laser can be kept through the mode, so that the use process of the laser projector is safe and convenient.
As still another embodiment, as shown in fig. 6, the projector further includes: the processing component 503, which is connected to the infrared laser receiver 601, determines that there is a light intensity change based on the infrared reflection signal of the infrared laser, and specifically, the step of generating a turn-off command for the imaging laser 501 is as follows:
determining first light intensity information of the infrared laser emitted by the infrared laser emitter;
receiving an infrared reflection signal of the infrared laser through an infrared receiver;
determining second light intensity information of the infrared reflection signal;
and if the difference between the first light intensity information and the second light intensity information meets a first preset condition, determining that light intensity change exists, and generating a closing instruction aiming at the imaging laser.
The infrared laser is emitted by an infrared laser emitter. The infrared laser light may be reflected on an impenetrable device such as a projection device, a human body, or the like. The infrared laser is different from the imaging laser. The imaging laser is a laser emitted by an imaging laser for projecting an image on a projection device. The infrared laser is emitted by an infrared laser emitter and is used for detecting whether light rays are shielded or absorbed in a laser projection area.
When the infrared laser is emitted to a user, the user can reflect the infrared laser, but some special parts of the user, such as human eyes, do not have a reflection function, so that the laser which is reflected by the laser projection device can be received by utilizing the non-reflection characteristic, the first light intensity information of the reflected infrared reflection signal is compared with the second light intensity information of the non-emitted infrared laser, and if the difference between the first light intensity information and the second light intensity information is larger, a target object exists in the laser area.
The first preset condition may be determined according to a relative area of the human eye to the infrared laser. Assuming that a projection area of the infrared laser projection is S, a general area of a human eye is S, a ratio of the area of the human eye to the projection area is calculated as D, and assuming that first light intensity information of the infrared laser is Q1, a light intensity threshold may be D × Q1, and the first preset condition may be that a difference between the first light intensity information Q1 and the second light intensity information Q2 is greater than the light intensity threshold D × Q1.
As a possible implementation manner, the determining, by the processing component, first light intensity information of the infrared laser light emitted by the infrared laser emitter may specifically be:
and when the human face exists in the laser projection area, emitting infrared laser through an infrared emitter, and determining first light intensity information of the infrared laser.
The human eyes are located on a human face, and when a human face is detected, the human eyes on the human face can be generally determined. Therefore, in order to make the detection process of the light intensity variation more accurate, the human face in the laser projection area can be detected after the human face in the laser projection area is detected.
Aiming at the light absorption effect of human eyes, when a person enters a laser projection area, the existence of laser projection equipment in the laser projection area can be judged according to the light intensity difference between a reflected infrared signal and the original infrared laser which is not projected. By the aid of the judging method, whether the target exists can be judged through the characteristics of the object, the pertinence of the judging process can be stronger, and the accuracy is higher.
In the embodiment of the application, when a person enters a laser projection area, the existence of laser projection equipment in the laser projection area is judged according to the light intensity difference between a reflected infrared signal and original infrared laser which is not projected. After whether the target object exists or not is accurately judged, a protection mechanism with higher safety can be provided for the target object.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include non-transitory computer readable media (transient media), such as modulated data signals and carrier waves.
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. Furthermore, the term "coupled" is intended to encompass any direct or indirect electrical coupling. Thus, if a first device couples to a second device, that connection may be through a direct electrical coupling or through an indirect electrical coupling via other devices and couplings. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.
Claims (6)
1. A laser projector control method, comprising:
determining a laser projection area corresponding to an imaging laser of the laser projector;
emitting infrared laser to the laser projection area through an infrared laser emitter;
based on the infrared reflection signal of the infrared laser, when the light intensity change is determined to exist, a closing instruction aiming at the imaging laser is generated;
executing the closing instruction to control the imaging laser to stop emitting imaging laser;
wherein, when determining that there is a light intensity change based on the infrared reflection signal of the infrared laser, generating a turn-off instruction for the imaging laser comprises:
when the human face is detected to exist in the laser projection area, determining first light intensity information of the infrared laser emitted by the infrared laser emitter;
receiving an infrared reflection signal of the infrared laser through an infrared receiver;
determining second light intensity information of the infrared reflection signal;
if the difference between the first light intensity information and the second light intensity information meets a first preset condition, determining that light intensity change exists, and generating a closing instruction aiming at the imaging laser;
the first preset condition is that the difference value between the first light intensity information and the second light intensity information is larger than a light intensity threshold value, and the light intensity threshold value is determined according to the area of human eyes, the projection area of infrared laser projection and the first light intensity information.
2. The method of claim 1, wherein after executing the shutdown instruction to control the imaging laser to stop emitting imaging laser light, further comprising:
determining that no light intensity change exists based on an infrared reflection signal of the infrared laser, and generating a projection instruction for the imaging laser;
and executing the projection instruction to control the imaging laser to re-emit the imaging laser.
3. A laser projector control apparatus comprising, a storage component, a processing component coupled to the storage component, an infrared laser emitter coupled to the processing component; the infrared laser transmitter is used for transmitting infrared laser;
wherein the storage component comprises one or more memories and the processing component comprises one or more processors; the one or more memories are to store one or more computer instructions for execution invoked by the processing component;
the processing component is to:
determining a laser projection area corresponding to an imaging laser of the laser projector;
emitting infrared laser to the laser projection area through an infrared laser emitter;
based on the infrared reflection signal of the infrared laser transmitter, when the light intensity change is determined to exist, a closing instruction aiming at the imaging laser is generated;
executing the closing instruction to control the imaging laser to stop emitting imaging laser;
the apparatus further comprises: an infrared laser receiver connected with the processing assembly; the processing component determines that a light intensity change exists based on the reflected signal of the infrared laser, and specifically, the step of generating a closing instruction for the imaging laser comprises the following steps:
when the human face is detected to exist in the laser projection area, determining first light intensity information of the infrared laser emitted by the infrared laser emitter;
receiving an infrared reflection signal of the infrared laser through an infrared receiver; determining second light intensity information of the infrared reflection signal;
if the difference between the first light intensity information and the second light intensity information meets a first preset condition, determining that light intensity change exists, and generating a closing instruction aiming at the imaging laser;
the first preset condition is that the difference value between the first light intensity information and the second light intensity information is larger than a light intensity threshold value, and the light intensity threshold value is determined according to the area of human eyes, the projection area of infrared laser projection and the first light intensity information.
4. The device of claim 3, wherein the processing component is further configured to:
determining that no light intensity change exists based on an infrared reflection signal of the infrared laser, and generating a projection instruction for the imaging laser;
and executing the projection instruction to control the imaging laser to re-emit the imaging laser.
5. A laser projector, comprising: the device comprises an imaging laser, an infrared laser transmitter, a processing assembly and a storage assembly connected with the processing assembly; the processing components include one or more processors, the storage components include one or more memories;
the storage component is used for storing one or more computer instructions, wherein the one or more computer instructions are used for the processing component to call and execute;
the imaging laser is used for emitting imaging laser; the infrared laser transmitter is used for transmitting infrared laser;
the processing component is to:
determining a laser projection area corresponding to an imaging laser of the laser projector;
emitting infrared laser to the laser projection area through an infrared laser emitter;
based on the infrared reflection signal of the infrared laser, when the light intensity change is determined to exist, a closing instruction aiming at the imaging laser is generated;
executing the closing instruction to control the imaging laser to stop emitting imaging laser;
the projector further includes: and the processing assembly determines that a closing instruction aiming at the imaging laser device is generated when the light intensity change exists based on the infrared reflection signal of the infrared laser, and specifically comprises the following steps:
when the human face is detected to exist in the laser projection area, determining first light intensity information of the infrared laser emitted by the infrared laser emitter;
receiving an infrared reflection signal of the infrared laser through an infrared receiver;
determining second light intensity information of the infrared reflection signal;
if the difference between the first light intensity information and the second light intensity information meets a first preset condition, determining that light intensity change exists, and generating a closing instruction aiming at the imaging laser;
the first preset condition is that the difference value between the first light intensity information and the second light intensity information is larger than a light intensity threshold value, and the light intensity threshold value is determined according to the area of human eyes, the projection area of infrared laser projection and the first light intensity information.
6. The laser projector of claim 5, wherein the processing component is further specifically configured to:
generating a projection instruction aiming at the imaging laser when determining that no light intensity change exists based on the infrared reflection signal of the infrared laser;
and executing the projection instruction to control the imaging laser to re-emit the imaging laser.
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| CN113296339A (en) * | 2020-02-24 | 2021-08-24 | 青岛海尔多媒体有限公司 | Method and device for protecting eyes of laser projection equipment and laser projection equipment |
| CN112822468B (en) * | 2020-12-31 | 2023-02-17 | 成都极米科技股份有限公司 | Projection control method and device, projection equipment and laser controller |
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