CN113296339A - Method and device for protecting eyes of laser projection equipment and laser projection equipment - Google Patents
Method and device for protecting eyes of laser projection equipment and laser projection equipment Download PDFInfo
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- CN113296339A CN113296339A CN202010110700.1A CN202010110700A CN113296339A CN 113296339 A CN113296339 A CN 113296339A CN 202010110700 A CN202010110700 A CN 202010110700A CN 113296339 A CN113296339 A CN 113296339A
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- 230000003287 optical effect Effects 0.000 claims description 8
- 230000006378 damage Effects 0.000 abstract description 11
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- 230000007257 malfunction Effects 0.000 abstract description 2
- 230000035807 sensation Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 6
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- 208000027418 Wounds and injury Diseases 0.000 description 1
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2053—Intensity control of illuminating light
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
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Abstract
The application relates to the technical field of intelligent household appliances, and discloses a method for protecting eyes of laser projection equipment, which comprises the following steps: detecting the condition of the projection area; when the change occurs in the projection area, the output power of the laser transmitter is reduced. The laser projection equipment comprises a laser transmitter, and the laser transmitter transmits laser to the projection area for projection. In this application, human body in case gets into laser emitter's projection area, can cause the change in the projection area, changes control laser emitter's output according to the projection area, prevents to cause the harm to the eyes, because the speed of laser response is the nanometer, so user's sensation is to accomplish the protection action in the twinkling of an eye, because the protection action is very fast can make projection area and eyeshield regional the same, and then the reduction eyeshield is regional, reduces the probability that produces the malfunction. The application also discloses a device and laser projection equipment for laser projection equipment eyeshield.
Description
Technical Field
The application relates to the technical field of intelligent household appliances, for example, to a method and a device for protecting eyes of laser projection equipment and the laser projection equipment.
Background
At present, a laser projection product generally uses a pyroelectric infrared sensor to sense human body approach, when the laser projection product is irradiated by human body infrared light with non-constant intensity, the charge density of a surface electrode of the laser projection product is changed due to the generated temperature change, so that pyroelectric current is generated, and the converted electric signal controls a laser head or reduces the emergent light quantity.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
the eye protection area covered by the infrared sensor is generally larger than the laser emitting range, once a human body enters the eye protection area, laser projection is immediately closed, and a plurality of false operations are generated.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a method and a device for protecting eyes of laser projection equipment and the laser projection equipment, and aims to solve the technical problems that an eye protection area is larger than a laser emitting range, once a human body enters the eye protection area, laser projection is immediately closed, and a lot of misoperation is generated.
In some embodiments, a method for eye protection for a laser projection device comprises: detecting the condition of the projection area; when the change occurs in the projection area, the output power of the laser transmitter is reduced. The laser projection equipment comprises a laser transmitter, and the laser transmitter transmits laser to the projection area for projection.
In some embodiments, an apparatus for eye protection for a laser projection device comprises: comprising a processor and a memory storing program instructions, the processor being configured to execute the above-described method for laser projection eye protection when executing the program instructions.
In some embodiments, a laser projection device comprises: the device that is used for laser projection eyeshield is including optical sensing module and the above-mentioned. The optical sensing module is configured to detect a change within the projection area.
The method and the device for protecting eyes by laser projection and the laser projection provided by the embodiment of the disclosure can realize the following technical effects:
once the human body gets into laser emitter's projection area, can cause the change in the projection area, change control laser emitter's output according to the projection area, prevent to cause the harm to human eyes, because the speed of laser-induced is the nanometer, so user's sensation is the protection action of accomplishing in the twinkling of an eye, because the protection action can make projection area and eyeshield regional the same very fast, and then reduces the eyeshield region, reduces the probability that produces the malfunction.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
FIG. 1 is a schematic diagram of a method for eye protection for a laser projection device according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of another method for eye protection for a laser projection device provided by an embodiment of the present disclosure;
fig. 3 is a schematic view of an apparatus for protecting eye of a laser projection device according to an embodiment of the disclosure;
fig. 4 is a schematic diagram of a laser projection device provided by an embodiment of the disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
With reference to fig. 1 and 2, an embodiment of the present disclosure provides a method for protecting eyes of a laser projection device, including:
s01, detecting the condition of the projection area;
and S02, reducing the output power of the laser emitter when the change occurs in the projection area.
The laser projection device comprises a laser emitter, and the laser emitter emits laser to a projection area to generate projection on the projection screen.
By adopting the method for protecting eyes of the laser projection equipment, once a human body enters the projection area of the laser emitter, the change in the projection area can be caused, the output power of the laser emitter is controlled according to the change of the projection area, the damage to the eyes is prevented, and because the laser sensing speed is in a nanometer level, the user feels that the protection action is instantly finished, and the projection area and the eye protection area can be the same due to the fast protection action, so that the eye protection area is reduced, and the probability of generating misoperation is reduced.
Optionally, the changing within the projection area comprises: the position of the laser in the projection area where the laser is diffusely reflected changes. Therefore, a human body can shield the laser after entering the projection area, the shielding part can generate diffuse reflection, whether the projection area is changed or not is judged through detecting the change of the position of the diffuse reflection of the laser in the projection area, whether the user enters the projection area or not can be judged through the change of the projection area more intuitively, and the user is protected better.
Optionally, the changing of the position of the laser in the projection area in which the laser is diffusely reflected includes: the distance between the position where the same laser beam is diffusely reflected and a certain point is changed. Therefore, the position of the laser subjected to diffuse reflection is determined to be changed through laser ranging, the determination speed is high, and the reaction speed is improved.
Optionally, the changing of the distance between the position where the same laser beam is diffusely reflected and the certain point includes: calculating the distance between a laser emitting port of the laser emitter and the position where laser is subjected to diffuse reflection; comparing the value with a certain value; if the value is the same as the fixed value, the position of the laser subjected to diffuse reflection is not changed; if the value is different from the fixed value, the position of the laser where diffuse reflection occurs is changed. Therefore, the position of the laser subjected to diffuse reflection is determined to be changed through laser ranging, the determination speed is high, and the reaction speed is improved.
Optionally, the fixed value is a distance between a laser emitting port of the laser projector and the projection screen, the distance between the laser emitting port of the laser projector and the projection screen is determined according to a model of the laser projection device, and the distance between the laser emitting port of the laser projector and the projection screen of the laser projection device of the same model is a fixed value.
Optionally, when the variation occurs within the projection area, reducing the output power of the laser emitter comprises: when the position of laser diffuse reflection is changed, reducing the output power of a laser transmitter to a first output power; and the position of the laser for diffuse reflection is not recovered within the first preset time, and the output power of the laser transmitter is reduced to a second output power. Therefore, when the position of the laser subjected to diffuse reflection changes, the fact that a user possibly enters the projection area is indicated, at the moment, the power of the laser emitter is reduced, the damage of the laser is reduced, when the user does not leave the projection area within the preset time, the power of the laser emitter is further reduced, and the situation that when the user enters the projection area for a short time, the output power of the laser emitter is directly adjusted to be too small, and the projection continuity is affected is prevented.
Optionally, the non-recovery of the position of the laser where the diffuse reflection occurs within the first preset time period includes: the distance between the laser emitting port of the laser emitter and the position where the laser generates diffuse reflection is not recovered to the fixed value distance between the laser emitting port of the laser emitter and the projection screen. Therefore, whether the user stays in the projection area or not can be judged, and if the user stays in the projection area for too long, the output power of the laser emitter is further reduced.
Optionally, when the position of the laser subjected to diffuse reflection changes, reducing the output power of the laser transmitter to a first output power; and increasing the output power of the laser transmitter after the position of the laser subjected to diffuse reflection is recovered. Therefore, after the position of the laser subjected to diffuse reflection is restored, the user leaves the projection area, and at the moment, the output power of the laser transmitter is increased, so that the laser transmitter works normally.
Optionally, after the position where the laser light is diffusely reflected is recovered, increasing the output power of the laser transmitter includes: after the position of the laser subjected to diffuse reflection is recovered, the output power of the laser transmitter is gradually increased from the first output power to the rated output power of the laser transmitter within a preset time period. Therefore, the power of the laser emitter is gradually increased in the preset time period, the situation that the user enters the projection area again in the preset time period is prevented, the power of the laser emitter is greatly adjusted in a short time, and the service life of the laser emitter is prolonged. For example, if the preset time period is 20 seconds, the power of the laser emitter is gradually increased from the first output power to the rated output power of the laser emitter within 20 seconds after the position where the laser light is diffusely reflected is restored.
Optionally, after the position where the laser light is diffusely reflected is recovered, increasing the output power of the laser transmitter includes: and increasing the output power of the laser transmitter to the rated output power of the laser transmitter after the second preset time after the position of the laser subjected to diffuse reflection is recovered. Therefore, the laser transmitter can be prevented from frequently adjusting the output power in a short time, the laser transmitter is protected, and the service life of the laser transmitter is prolonged. For example, if the second preset time period is 10 seconds, the output power of the laser transmitter is increased to the rated output power of the laser transmitter after 10 seconds after the position where the laser is diffusely reflected is restored.
Optionally, the second output power is less than the first output power. Therefore, under the condition that the laser transmitter operates at the first output power, if the user does not leave the projection area within the first preset time, the power of the laser transmitter is adjusted to be the second output power, and the second output power is smaller than the first output power, so that the damage of the laser to the user can be reduced.
Optionally, the first preset duration is less than or equal to 5 seconds. Like this, reduce laser emitter's power in 5 seconds, the laser of miniwatt has safe time when shining the user, can not cause the injury to the user in 5 seconds, has avoided causing laser emitter directly to adjust power by a wide margin when the user leaves fast after entering the projection area, influences the continuity of projection.
Optionally, the first preset duration is inversely proportional to the first power. Thus, the larger the first power is, the shorter the first preset time is, and the larger damage to the user caused by the overlarge laser power is prevented.
Optionally, the first output power is greater than or equal to twenty percent of the rated output power of the laser transmitter and less than or equal to fifty percent of the rated output power of the laser transmitter. Therefore, under the condition that the output power is greater than or equal to twenty percent of the rated output power of the laser emitter and is less than or equal to fifty percent of the rated output power of the laser emitter, the projection can be kept continuously, the intensity of the laser can be reduced, the damage to users is prevented, and the safety is improved.
Optionally, the second output power is less than or equal to five percent of the rated output power of the laser transmitter. Therefore, when the power of the laser emitter is reduced to five percent of the rated output power, the damage to the user caused by the fact that the user is exposed to laser in the production time is avoided, and the safety is improved.
Optionally, the second output power is 0. Therefore, the power of the laser emitter is directly adjusted to be 0, namely the laser emitter is turned off, so that the damage to a user is reduced to the maximum extent, and the user is prevented from being seriously damaged due to the fact that the user stays in the projection area for too long time.
Optionally, S02, when the variation occurs in the projection area, further comprising, after reducing the output power of the laser emitter:
s03, prompting the user to move away from the projection area. Therefore, the situation that the user is in the projection area for a long time to influence the normal operation of projection can be prevented, and potential safety hazards exist.
Optionally, prompting the user away from the projection area comprises: and the laser projection equipment sends out prompt tones to remind the user of keeping away from the projection area. Therefore, the user is reminded to be far away from the projection area through voice, so that the user can more clearly recognize that the user is in the projection area, and the attention of the user is attracted.
Optionally, when the position of the laser subjected to diffuse reflection changes, prompting the user to leave the projection area, and when the position of the laser subjected to diffuse reflection recovers, or when the position of the laser subjected to diffuse reflection does not recover within a first preset time period, stopping prompting. Thus, when the user leaves the projection area or the output power of the laser emitter is adjusted to the safe output power, the prompt is stopped, and noise is prevented from disturbing residents.
Referring to fig. 3, an embodiment of the present disclosure provides an apparatus for protecting eyes of a laser projection device, which includes a processor (processor)100 and a memory (memory) 101. Optionally, the apparatus may also include a Communication Interface (Communication Interface)102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via a bus 103. The communication interface 102 may be used for information transfer. Processor 100 may invoke logic instructions in memory 101 to perform the method for eye protection for a laser projection device of the above-described embodiments.
In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. Processor 100 executes functional applications and data processing by executing program instructions/modules stored in memory 101, that is, implements the method for eye protection for a laser projection device in the above-described embodiments.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides laser projection equipment, which comprises the device for protecting eyes of the laser projection equipment.
Embodiments of the present disclosure provide a computer-readable storage medium having stored thereon computer-executable instructions configured to perform the above-described method for eye protection for a laser projection device.
Embodiments of the present disclosure provide a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the method for … described above.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
As shown in fig. 4, an embodiment of the present disclosure provides a laser projection apparatus including: the device for protecting eyes through laser projection is disclosed.
Optionally, the laser projection device further comprises: laser emitter 201, projection screen 202, optical sensing module 203, and control module 204. The optical sensing module 203 is configured to detect changes within the projection area; a control module 204 configured to reduce the output power of the laser transmitter 201 when a change occurs within the projection area. Therefore, once a human body enters the projection area of the laser emitter 201, the change in the projection area can be caused, the output power of the laser emitter 201 is controlled according to the change of the projection area, damage to human eyes is prevented, the laser sensing speed is in a nanometer level, so that a user feels that a protection action is finished instantly, the projection area and the eye protection area are the same due to the fact that the protection action is fast, the eye protection area is further reduced, and the probability of generating misoperation is reduced.
Optionally, the optical sensing module 203 is disposed at the laser emitting port of the laser emitter 201. In this way, the distance between the position where the laser light is diffusely reflected and the optical sensing module 203 can be detected by the laser emitter 201, and whether the position where the laser light is diffusely reflected is changed or not can be determined by comparing the distance with a fixed value between the laser emitter 201 and the projection screen.
Optionally, the laser projection device comprises a laser television.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method or device comprising the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit may be merely a division of a logical function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A method for eye protection for a laser projection device, the laser projection device including a laser emitter that emits laser light to a projection area for projection, the method comprising:
detecting a condition of the projection area;
reducing the output power of the laser emitter when a change occurs within the projected area.
2. The method of claim 1, wherein the changing within the projected area comprises:
the position of the laser in the projection area where diffuse reflection occurs changes.
3. The method of claim 2, wherein reducing the output power of the laser emitter when the change occurs within the projected area comprises:
when the position of the laser subjected to diffuse reflection is changed, reducing the output power of the laser transmitter to a first output power;
and in a first preset time period, the position of the laser where diffuse reflection occurs is not recovered, and the output power of the laser transmitter is reduced to a second output power.
4. The method of claim 3, wherein the first predetermined period of time is less than or equal to 5 seconds.
5. The method of claim 3, wherein the first output power is greater than or equal to twenty percent and less than or equal to fifty percent of the rated output power of the laser transmitter.
6. The method of claim 3, wherein the second output power is less than or equal to five percent of the rated output power of the laser transmitter.
7. The method of any of claims 1 to 6, wherein reducing the output power of the laser emitter when the change occurs within the projected area further comprises:
and prompting the user to move away from the projection area.
8. An apparatus for eye protection for a laser projection device comprising a processor and a memory having stored thereon program instructions, wherein the processor is configured to perform the method for eye protection for laser projection of any of claims 1 to 7 when executing the program instructions.
9. A laser projection device comprising a laser emitter, further comprising:
an optical sensing module configured to detect a change within the projection area; and the combination of (a) and (b),
the device for laser projection eye protection of claim 8.
10. The laser projection device of claim 9, wherein the laser projection device comprises a laser television.
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| CN202010110700.1A CN113296339A (en) | 2020-02-24 | 2020-02-24 | Method and device for protecting eyes of laser projection equipment and laser projection equipment |
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