Eye protection method and device for laser projection equipment, laser projection equipment

Abstract

The present application relates to the technical field of smart home appliances, and discloses a method for eye protection of laser projection equipment, including: detecting the situation in the projection area; when changes occur in the projection area, reducing the output power of the laser emitter. Among them, the laser projection equipment includes a laser emitter, and the laser emitter emits laser light to the projection area for projection. In the present application, once the human body enters the projection area of ​​the laser emitter, it will cause changes in the projection area. The output power of the laser emitter is controlled according to the changes in the projection area to prevent damage to the human eye. Because the speed of laser sensing is at the nanometer level, the user feels that the protection action is completed instantly. Since the protection action is faster, the projection area can be made the same as the eye protection area, thereby reducing the eye protection area and reducing the probability of false operation. The present application also discloses a device for eye protection of laser projection equipment and a laser projection device.

Description

Technical Field

[0001] The present application relates to the technical field of smart home appliances, for example, to a method and device for eye protection of laser projection equipment, and laser projection equipment. Background Art

[0002] At present, laser projection products generally use pyroelectric infrared sensors to sense the approach of a human body. When it is exposed to human infrared light of non-constant intensity, the resulting temperature change causes the charge density of the electrode on its surface to change, thereby generating a pyroelectric current. The converted electrical signal controls the laser head or reduces the amount of emitted light.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0004] The eye protection area covered by the infrared sensor is generally larger than the laser emission range. Once the human body enters the eye protection area, the laser projection is immediately turned off, resulting in many false operations. Summary of the invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] The embodiments of the present disclosure provide a method and device for eye protection of laser projection equipment and a laser projection equipment, so as to solve the technical problem that the eye protection area is larger than the laser emission range, and once the human body enters the eye protection area, the laser projection is immediately shut down, resulting in many malfunctions.

[0007] In some embodiments, a method for eye protection of a laser projection device includes: detecting the situation in the projection area; and reducing the output power of a laser emitter when a change occurs in the projection area. The laser projection device includes a laser emitter, and the laser emitter emits laser light to the projection area for projection.

[0008] In some embodiments, an apparatus for eye protection of laser projection equipment includes: a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned method for eye protection of laser projection when executing the program instructions.

[0009] In some embodiments, the laser projection device includes: an optical sensing module and the above-mentioned device for laser projection eye protection. The optical sensing module is configured to detect changes in the projection area.

[0010] The method and device for laser projection eye protection and laser projection provided by the embodiments of the present disclosure can achieve the following technical effects:

[0011] Once the human body enters the projection area of ​​the laser transmitter, it will cause changes in the projection area. The output power of the laser transmitter is controlled according to the changes in the projection area to prevent damage to the human eyes. Because the speed of laser sensing is at the nanometer level, the user feels that the protection action is completed instantly. Since the protection action is fast, the projection area can be made the same as the eye protection area, thereby reducing the eye protection area and reducing the chance of false action.

[0012] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0014] Figure 1 is a schematic diagram of a method for eye protection of a laser projection device provided by an embodiment of the present disclosure;

[0015] Figure 2 is a schematic diagram of another method for eye protection of a laser projection device provided by an embodiment of the present disclosure;

[0016] Figure 3 is a schematic diagram of a device for eye protection of a laser projection device provided by an embodiment of the present disclosure;

[0017] Figure 4 Schematic diagram of a laser projection device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0018] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0019] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0020] Combination Figure 1 , 2 As shown, the embodiment of the present disclosure provides a method for eye protection of a laser projection device, comprising:

[0021] S01, detecting the situation of the projection area;

[0022] S02, when there is a change in the projection area, reducing the output power of the laser transmitter.

[0023] The laser projection device includes a laser emitter, which emits laser light to a projection area to generate a projection on a projection screen.

[0024] By using the eye protection method for laser projection equipment provided by the embodiment of the present disclosure, once the human body enters the projection area of ​​the laser emitter, it will cause changes in the projection area. The output power of the laser emitter is controlled according to the changes in the projection area to prevent damage to the human eye. Because the speed of laser sensing is at the nanometer level, the user feels that the protection action is completed instantly. Since the protection action is fast, the projection area can be made the same as the eye protection area, thereby reducing the eye protection area and reducing the probability of false action.

[0025] Optionally, the change in the projection area includes: a change in the position where the laser diffusely reflects in the projection area. In this way, after entering the projection area, the human body will block the laser, and the blocked part will produce diffuse reflection. By detecting the change in the position where the laser diffusely reflects in the projection area, it is determined whether there is a change in the projection area. It is possible to more intuitively determine whether the user has entered the projection area through the change in the projection area, thereby better protecting the user.

[0026] Optionally, the change in the position where the laser diffusely reflects in the projection area includes: the distance between the position where the same laser diffusely reflects and a certain point changes. In this way, the change in the position where the laser diffusely reflects is determined by laser ranging, and the determination speed is fast, thereby improving the reaction speed.

[0027] Optionally, the change in the distance between the position where the same laser beam diffusely reflects and a certain point includes: calculating the distance between the laser emission port of the laser emitter and the position where the laser diffusely reflects; comparing the value with a certain value; if the value is the same as the certain value, the position where the laser diffusely reflects has not changed; if the value is different from the certain value, the position where the laser diffusely reflects has changed. In this way, the change in the position where the laser diffusely reflects is determined by laser ranging, and the determination speed is fast, thereby improving the reaction speed.

[0028] Optionally, the fixed value is the distance between the laser emission port of the laser emitter and the projection screen. The distance between the laser emission port of the laser emitter and the projection screen is determined according to the model of the laser projection equipment. For laser projection equipment of the same model, the distance between the laser emission port of the laser emitter and the projection screen is a fixed value.

[0029] Optionally, when there is a change in the projection area, reducing the output power of the laser emitter includes: when the position where the laser diffusely reflects changes, reducing the output power of the laser emitter to a first output power; if the position where the laser diffusely reflects does not recover within a first preset time period, reducing the output power of the laser emitter to a second output power. In this way, when the position where the laser diffusely reflects changes, it means that the user may have entered the projection area. At this time, reducing the power of the laser emitter reduces the damage of the laser. When the user does not leave the projection area within a preset time period, further reducing the power of the laser emitter prevents the output power of the laser emitter from being adjusted to too low when the user briefly enters the projection area, thereby affecting the continuity of the projection.

[0030] Optionally, the position where the diffuse reflection of the laser occurs within the first preset time period is not restored, including: the distance between the laser emission port of the laser emitter and the position where the diffuse reflection of the laser occurs is not restored to the fixed value distance between the laser emission port of the laser emitter and the projection screen. In this way, it can be determined whether the user stays in the projection area. If the user stays in the projection area for too long, the output power of the laser emitter is further reduced.

[0031] Optionally, when the position where the laser diffuses is reflected changes, the output power of the laser emitter is reduced to the first output power; after the position where the laser diffuses is reflected is restored, the output power of the laser emitter is increased. In this way, after the position where the laser diffuses is reflected is restored, it means that the user has left the projection area, and at this time, the output power of the laser emitter is increased to enable the laser emitter to work normally.

[0032] Optionally, after the position where the laser diffuse reflection occurs is restored, increasing the output power of the laser emitter includes: gradually increasing the output power of the laser emitter from the first output power to the rated output power of the laser emitter within a preset time period after the position where the laser diffuse reflection occurs is restored. In this way, the power of the laser emitter is gradually increased within the preset time period to prevent the user from entering the projection area again within the preset time period, causing the power of the laser emitter to be adjusted significantly in a short period of time, thereby increasing the service life of the laser emitter. For example, if the preset time period is 20 seconds, then within 20 seconds after the position where the laser diffuse reflection occurs is restored, the power of the laser emitter is gradually increased from the first output power to the rated output power of the laser emitter.

[0033] Optionally, after the position where the laser diffuse reflection occurs is restored, increasing the output power of the laser transmitter includes: increasing the output power of the laser transmitter to the rated output power of the laser transmitter after a second preset time period after the position where the laser diffuse reflection occurs is restored. In this way, frequent adjustment of the output power of the laser transmitter in a short period of time can be avoided, the laser transmitter is protected, and the service life of the laser transmitter is increased. 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 10 seconds after the position where the laser diffuse reflection occurs is restored.

[0034] Optionally, the second output power is less than the first output power. In this way, when the laser transmitter is running 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 the second output power, which is less than the first output power, so as to reduce the damage of the laser to the user.

[0035] Optionally, the first preset time is less than or equal to 5 seconds. In this way, the power of the laser emitter is reduced within 5 seconds, and the low-power laser has a safe time when irradiating the user, and will not cause harm to the user within 5 seconds, thereby avoiding the laser emitter directly adjusting the power significantly when the user enters the projection area and leaves quickly, thereby affecting the continuity of the projection.

[0036] Optionally, the first preset duration is inversely proportional to the first power. Thus, the greater the first power, the shorter the first preset duration, thereby preventing excessive laser power from causing significant damage to the user.

[0037] Optionally, the first output power is greater than or equal to 20% of the rated output power of the laser transmitter, and less than or equal to 50% of the rated output power of the laser transmitter. In this way, when the output power is greater than or equal to 20% of the rated output power of the laser transmitter, and less than or equal to 50% of the rated output power of the laser transmitter, the projection can be continued, and the intensity of the laser can be reduced to prevent damage to the user and improve safety.

[0038] Optionally, the second output power is less than or equal to 5% of the rated output power of the laser transmitter. In this way, when the power of the laser transmitter is reduced to less than 5% of the rated output power, damage to the user caused by prolonged exposure to the laser is avoided, thereby improving safety.

[0039] Optionally, the second output power is 0. In this way, directly adjusting the power of the laser emitter to 0 is equivalent to turning off the laser emitter, minimizing damage to the user and preventing the user from staying in the projection area for too long and causing serious damage to the user.

[0040] Optionally, S02, when a change occurs in the projection area, reducing the output power of the laser transmitter further includes:

[0041] S03, prompting the user to stay away from the projection area. In this way, the user can be prevented from staying in the projection area for a long time, which may affect the normal projection and cause potential safety hazards.

[0042] Optionally, prompting the user to stay away from the projection area includes: the laser projection device emits a reminder sound to remind the user to stay away from the projection area. In this way, the user is reminded to stay away from the projection area by voice, so that the user can more clearly recognize that he is in the projection area, and attract the user's attention.

[0043] Optionally, when the position where the laser diffuses reflects changes, the user is prompted to stay away from the projection area, and when the position where the laser diffuses reflects recovers, or when the position where the laser diffuses reflects does not recover within the first preset time, the prompt stops. In this way, the prompt stops when the user leaves the projection area or the output power of the laser transmitter is adjusted to a safe output power, thereby preventing noise from disturbing people.

[0044] Combination Figure 3 As shown, an embodiment of the present disclosure provides a device for eye protection of laser projection equipment, including a processor (processor) 100 and a memory (memory) 101. Optionally, the device may also include a communication interface (Communication Interface) 102 and a bus 103. Among them, the processor 100, the communication interface 102, and the memory 101 can communicate with each other through the bus 103. The communication interface 102 can be used for information transmission. The processor 100 can call the logic instructions in the memory 101 to execute the method for eye protection of laser projection equipment in the above embodiment.

[0045] In addition, the logic instructions in the memory 101 described above may be implemented in the form of software functional units and when sold or used as independent products, may be stored in a computer-readable storage medium.

[0046] The memory 101 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 100 executes functional applications and data processing by running the program instructions / modules stored in the memory 101, that is, the method for eye protection of the laser projection device in the above embodiment is implemented.

[0047] The memory 101 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 101 may include a high-speed random access memory and may also include a non-volatile memory.

[0048] An embodiment of the present disclosure provides a laser projection device, comprising the above-mentioned device for eye protection of the laser projection device.

[0049] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for eye protection of a laser projection device.

[0050] An embodiment of the present disclosure provides a computer program product, which includes a computer program stored on a computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the above-mentioned method for ...

[0051] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0052] Combination Figure 4 As shown, an embodiment of the present disclosure provides a laser projection device including: the above-mentioned device for eye protection during laser projection.

[0053] Optionally, the laser projection device further includes: a laser emitter 201, a projection screen 202, an optical sensing module 203 and a control module 204. The optical sensing module 203 is configured to detect changes in the projection area; the control module 204 is configured to reduce the output power of the laser emitter 201 when changes occur in the projection area. In this way, once the human body enters the projection area of ​​the laser emitter 201, changes will occur in the projection area. The output power of the laser emitter 201 is controlled according to the changes in the projection area to prevent damage to the human eye. Because the speed of laser sensing is at the nanometer level, the user feels that the protection action is completed instantly. Since the protection action is fast, the projection area can be made the same as the eye protection area, thereby reducing the eye protection area and reducing the probability of false action.

[0054] Optionally, the optical sensing module 203 is disposed at the laser emission port of the laser emitter 201. In this way, the laser emitter 201 can detect the distance between the position where the laser diffusely reflects and the optical sensing module 203, and by comparing the distance with a fixed value between the laser emitter 201 and the projection screen, it is determined whether the position where the laser diffusely reflects changes.

[0055] Optionally, the laser projection device includes a laser TV.

[0056] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method of the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0057] The above description and accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent possible changes only. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method or device including the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0058] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. Technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. Technicians can clearly understand that for the convenience and simplicity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0059] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units can be only a logical function division, and there can be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0060] The flowchart and block diagram in the accompanying drawings show the possible architecture, functions and operations of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and a part of the module, program segment or code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for eye protection of a laser projection device, wherein the laser projection device comprises a laser emitter, and the laser emitter emits laser light to a projection area for projection, characterized in that: include: Detecting the situation of the projection area; When the position where the laser light is diffusely reflected changes, reducing the output power of the laser transmitter to a first output power; If the position where the laser diffusely reflects is not restored within the first preset time period, reducing the output power of the laser transmitter to a second output power; After the position where the laser diffusely reflects is restored, the output power of the laser transmitter is increased to the rated output power of the laser transmitter after a second preset time period; After the position where the laser diffuse reflection occurs is restored, increasing the output power of the laser transmitter includes: after the position where the laser diffuse reflection occurs is restored, gradually increasing the output power of the laser transmitter from the first output power to the rated output power of the laser transmitter within a preset time period.

2. The method according to claim 1, characterized in that The first preset duration is less than or equal to 5 seconds.

3. The method according to claim 1, characterized in that The first output power is greater than or equal to 20 percent of the rated output power of the laser transmitter, and less than or equal to 50 percent of the rated output power of the laser transmitter.

4. The method according to claim 1, characterized in that: The second output power is less than or equal to 5 percent of the rated output power of the laser transmitter.

5. The method according to any one of claims 1 to 4, characterized in that: When a change occurs within the projection area, reducing the output power of the laser transmitter further includes: The user is prompted to stay away from the projection area.

6. A device for eye protection of laser projection equipment, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the laser projection eye protection method as described in any one of claims 1 to 5 when executing the program instructions.

7. A laser projection device, comprising a laser emitter, characterized in that: Also includes: An optical sensing module configured to detect changes within the projection area; and, The device for laser projection eye protection as claimed in claim 6.

8. The laser projection device according to claim 7, characterized in that: The laser projection device includes a laser television.

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