Laser projection device and control method therefor

Abstract

A laser projection device and a control method therefor are provided. The laser projection device comprises a lens, a lens cover, a detection component, and a controller. The detection component comprises a sensing part. The sensing part is configured to output a first instruction in response to whether the lens cover is shielding the lens. The first instruction is configured to indicate a first relative position between the lens cover and the lens, or a second relative position between the lens cover and the lens. The first relative position represents that the lens cover is not shielding the lens. The second relative position represents a position at which the lens cover shields the lens. The controller is configured to receive the first instruction, and, on the basis of the first instruction, execute a target operation corresponding to the first instruction.

Description

Laser projection device and control method thereof

[0001] This application claims priority to Chinese patent application No. 202410270151.2 filed on March 11, 2024; and priority to Chinese patent application No. 202410160100.4 filed on February 4, 2024, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of projection display technology, and in particular to a laser projection device and a control method thereof. Background Art

[0003] With the continuous advancement of technology, laser projection devices are increasingly being used in people's work and daily lives. Laser projection devices use a lens to project a beam of light onto a screen or wall to display the projected image. Typically, laser projection devices also include a lens cap that covers the lens. When using the laser projection device, the lens cap must be removed to display the projected image. After turning off the laser projection device, the lens cap must be replaced to protect the lens.

[0004] Summary of the Invention

[0005] On the one hand, a laser projection device is provided. The laser projection device includes a lens, a lens cover, a detection device, and a controller. The lens is configured to project an incident projection light beam into an image. The detection device includes a sensing component. The sensing component is configured to output a first instruction in response to whether the lens cover blocks the lens. The first instruction is configured to indicate a first relative position between the lens cover and the lens, and to indicate one of a second relative position between the lens cover and the lens. The first relative position represents that the orthographic projection of the lens cover is staggered with the orthographic projection of the lens on a plane perpendicular to the light emitting direction of the lens. The second relative position represents the position where the lens cover blocks the lens. The controller is connected to the detection device and is configured to receive the first instruction and, based on the first instruction, execute the target operation corresponding to the first instruction.

[0006] In another aspect, a control method for a laser projection device is provided. The method is applied to the laser projection device. The laser projection device includes a lens, a lens cover, a detection device, a laser, a display unit, and a controller. The lens is configured to project an incident projection beam into an image. The detection device is configured to detect whether the lens cover blocks the lens. The laser is configured to emit a laser beam. The display unit is configured to modulate the incident laser beam according to an image signal to form the projection beam. The controller is connected to the detection device, the laser, and the display unit. The method includes: in response to the lens cover blocking the lens, outputting a first image signal to the display unit and controlling the lens to stop projecting the projection beam; in response to the lens cover changing from blocking the lens to a first relative position, outputting a second image signal to the display unit and controlling the laser to emit light so that the display unit modulates the projection beam projected onto the lens based on the second image signal for projection display; the first relative position indicates that, on a plane perpendicular to the light emission direction of the lens, the orthographic projection of the lens cover is offset from the orthographic projection of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] FIG1 is a structural diagram of a laser projection device according to some embodiments;

[0008] FIG2 is a light path diagram of a light source assembly, an optical modulation assembly, and a lens in a laser projection device according to some embodiments;

[0009] FIG3 is a schematic diagram showing a laser projection device projecting an image according to some embodiments;

[0010] FIG4 is a diagram illustrating an arrangement of tiny reflective mirrors in a digital micromirror device according to some embodiments;

[0011] FIG5 is a diagram showing the position of a tiny reflective mirror in the digital micromirror device of FIG4;

[0012] FIG6 is a schematic diagram illustrating the operation of a micro reflective lens according to some embodiments;

[0013] FIG7 is a structural diagram of another laser projection device according to some embodiments;

[0014] FIG8 is a flow chart of steps performed in a laser projection device according to some embodiments;

[0015] FIG9 is a structural diagram of another laser projection device according to some embodiments;

[0016] FIG10 is a structural diagram of yet another laser projection device according to some embodiments;

[0017] FIG11 is a block diagram of a laser projection device according to some embodiments;

[0018] FIG12 is a partial structural diagram of a laser projection device according to some embodiments;

[0019] FIG13 is a schematic diagram of a lens cover in a first position when covering the lens according to some embodiments;

[0020] FIG14 is a schematic diagram of a second position of a lens cover when covering the lens according to some embodiments;

[0021] FIG15 is a schematic diagram of a third position of a lens cover when covering the lens according to some embodiments;

[0022] FIG16 is a schematic diagram of a fourth position of a lens cover when covering the lens according to some embodiments;

[0023] FIG17 is a schematic diagram of a fifth position of a lens cover covering a lens according to some embodiments;

[0024] FIG18 is a schematic diagram of a sixth position of a lens cover covering a lens according to some embodiments;

[0025] FIG19 is another partial structural diagram of a laser projection device according to some embodiments;

[0026] FIG20 is a structural diagram of yet another laser projection device according to some embodiments;

[0027] FIG21 is another flow chart of steps performed in a laser projection device according to some embodiments;

[0028] FIG22 is a structural diagram of yet another laser projection device according to some embodiments;

[0029] FIG23 is another flow chart of steps performed in a laser projection device according to some embodiments;

[0030] FIG24 is a structural diagram of yet another laser projection device according to some embodiments;

[0031] FIG25 is a flow chart of a process for powering on a laser projection device according to some embodiments;

[0032] FIG26 is a flow chart illustrating a process for using a laser projection device according to some embodiments;

[0033] FIG27 is a structural diagram of yet another laser projection device according to some embodiments;

[0034] FIG28 is a flow chart illustrating steps executed by a controller in a laser projection device according to some embodiments;

[0035] FIG29 is a structural diagram of yet another laser projection device according to some embodiments;

[0036] FIG30 is a structural diagram of yet another laser projection device according to some embodiments;

[0037] FIG31 is another flow chart of a process for starting up a laser projection device according to some embodiments;

[0038] 32 is another flow chart illustrating a process for using a laser projection device according to some embodiments. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings to clearly and completely describe some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0040] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0041] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of some embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0042] When describing some embodiments, the word "connected" and its derivatives may be used. The term "connected" should be understood broadly. For example, "connected" can mean fixed, removable, or integrated; it can be directly connected or indirectly connected through an intermediary. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0043] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0044] As used herein, the term "if" is optionally interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined that" or "if [stated condition or event] is detected" are optionally interpreted to mean "upon determining" or "in response to determining" or "upon detecting [stated condition or event]" or "in response to detecting [stated condition or event]," depending on the context.

[0045] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0046] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0047] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0048] As used herein, "parallel," "perpendicular," and "equal" include the stated conditions and conditions approximating the stated conditions within an acceptable range of deviation as determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0049] FIG1 is a structural diagram of a laser projection device according to some embodiments.

[0050] Some embodiments of the present disclosure provide a laser projection device 10. As shown in FIG1 , the laser projection device 10 includes a light source assembly 100, an optical modulation assembly 200, and a lens 300. The light source assembly 100 is configured to provide an illumination beam. The optical modulation assembly 200 is configured to modulate the illumination beam provided by the light source assembly 100 using an image signal to obtain a projection beam. The lens 300 is configured to project the projection beam onto a screen or wall to form an image.

[0051] The light source assembly 100, optical modulation assembly 200, and lens 300 are sequentially connected along the beam propagation direction and each is enclosed by a corresponding housing. The housings of the light source assembly 100, optical modulation assembly 200, and lens 300 support each optical component and ensure that each optical component meets the predetermined sealing or airtight requirements.

[0052] As shown in Figure 1, the first end of the optical modulation component 200 is connected to the light source component 100, and the light source component 100 and the optical modulation component 200 are arranged along the exit direction of the illumination light beam of the laser projection device 10 (refer to the M direction shown in Figure 1). The second end of the optical modulation component 200 is connected to the lens 300, and the optical modulation component 200 and the lens 300 are arranged along the exit direction of the projection light beam of the laser projection device 10 (refer to the N direction shown in Figure 1). The M direction is roughly perpendicular to the N direction. On the one hand, this connection structure can adapt to the optical path characteristics of the reflective light valve in the optical modulation component 200. On the other hand, it is also beneficial to shorten the length of the optical path in one dimension, which is beneficial to the structural arrangement of the laser projection device 10.

[0053] For example, when the light source assembly 100 , the optical modulation assembly 200 and the lens 300 are arranged in one dimensional direction (eg, the M direction), the length of the light path in this dimensional direction will be very long, which is not conducive to the structural arrangement of the laser projection device 10 .

[0054] In some embodiments, the light source assembly 100 can provide three primary colors of light in a timely manner (other colors of light can also be added on the basis of the three primary colors of light). Due to the persistence of vision of the human eye, the human eye sees white light formed by the mixture of the three primary colors of light. Alternatively, the light source assembly 100 can also output the three primary colors of light at the same time to continuously emit white light. The light source assembly 100 may include at least one laser, which can emit at least one color of laser, such as a red laser beam, a blue laser beam, or a green laser beam. For example, the light source assembly 100 is a monochromatic light source and includes a blue laser; or, the light source assembly 100 is a two-color light source and includes a two-color laser (such as a blue laser and a red laser); or, the light source assembly 100 is a three-color light source and includes a blue laser, a green laser, and a red laser.

[0055] Figure 2 is a light path diagram of a light source assembly, an optical modulation assembly, and a lens in a laser projection device according to some embodiments. Figure 3 is a principle diagram of projection imaging by a laser projection device according to some embodiments.

[0056] The illumination beam emitted by the light source assembly 100 enters the optical modulation assembly 200. As shown in Figures 2 and 3, the optical modulation assembly 200 includes an illumination lens assembly 201 and a light modulation device (or light valve) 202. The illumination lens assembly 201 is configured to receive the illumination beam provided by the light source assembly 100 and transmit the illumination beam to the light modulation device 202 at a set angle and direction. The light modulation device 202 is configured to modulate the illumination beam to obtain a projection beam and reflect the projection beam into the lens 300.

[0057] In some embodiments, as shown in Figures 2 and 3, the illumination lens assembly 201 includes a light homogenizing component 210, a lens assembly 220, and a prism assembly 250. The light homogenizing component 210 is configured to receive the illumination beam provided by the light source assembly 100 and homogenize the illumination beam. The lens assembly 220 is configured to converge the illumination beam emitted from the light homogenizing component 210 to the prism assembly 250. The prism assembly 250 is configured to reflect the illumination beam to the light modulation device 202.

[0058] In some embodiments, as shown in Figures 2 and 3, the light homogenizing component 210 includes a light pipe 2101. The light outlet of the light pipe 2101 can be rectangular, thereby shaping the light spot. This allows the light spot shape of the illumination beam emitted from the light pipe 2101 to match the rectangular light-receiving surface of the optical modulator 202. Alternatively, the light homogenizing component 210 can include a fly-eye lens. This fly-eye lens can homogenize the incident illumination beam and shape it to output a rectangular light spot.

[0059] 2 and 3 , the illumination lens assembly 201 further includes a reflector 230 . The reflector 230 is located on the light-emitting side of the lens assembly 220 and is configured to reflect the illumination light beam emitted from the lens assembly 220 to the prism assembly 250 .

[0060] In some embodiments, as shown in FIG. 3 , the light modulation device 202 includes a digital micromirror device (DMD) 240 .

[0061] In the optical modulation assembly 200, the DMD 240 is a core component, which is configured to modulate the illumination beam provided by the light source assembly 100 using the image signal. In other words, the DMD 240 controls the illumination beam to display different brightness and grayscale for different pixels of the image to be projected, thereby ultimately forming an optical image.

[0062] Figure 4 is a diagram illustrating the arrangement of micro-reflective mirrors in a digital micro-mirror device according to some embodiments. Figure 5 is a diagram illustrating the position of a micro-reflective mirror in the digital micro-mirror device of Figure 4 during its swing. Figure 6 is a schematic diagram illustrating the operation of a micro-reflective mirror according to some embodiments.

[0063] The DMD 240 is used in a digital light processing (DLP) projection architecture. As shown in Figures 2 and 3, the optical modulation component 200 utilizes the DLP projection architecture. As shown in Figure 4, the DMD 240 includes thousands of individually driven, rotating micro-mirrors 2401. These micro-mirrors 2401 are arranged in an array, with each micro-mirror 2401 (e.g., each micro-mirror 2401) corresponding to a pixel in the projected image. In the DLP projection architecture, each micro-mirror 2401 acts as a digital switch, capable of swinging within a range of ±12° or ±17° under the action of an applied electric field, allowing the reflected light to pass through the lens 300 along the optical axis and form an image on the screen, forming a bright pixel.

[0064] For example, as shown in FIG5 , for a micro-reflector 2401 with a deflection angle of ±12°, the state at +12° is the on state, and the state at -12° is the off state. For deflection angles between -12° and +12°, the actual operating states of the micro-reflector 2401 are only the on state and the off state. As shown in FIG6 , the light reflected by the micro-reflector 2401 at a negative deflection angle is referred to as OFF light, which is ineffective light. Ineffective light is generally absorbed by the housing or light absorption portion of the optical modulation component 200. Light reflected by the micro-reflector 2401 at a positive deflection angle is referred to as ON light. ON light is the effective light beam that is received by the micro-reflector 2401 on the surface of the DMD 240 and enters the lens 300 through a positive deflection angle for projection imaging. During the display period of a frame of image, some or all of the tiny reflective mirrors 2401 will switch between the on state and the off state once, thereby realizing the grayscale of each pixel in a frame of image according to the time that the tiny reflective mirrors 2401 remain in the on state and the off state respectively.

[0065] The light homogenizing component 210 , the lens group 220 and the reflector 230 at the front end of the DMD 240 form an illumination light path. The illumination light beam emitted by the light source assembly 100 passes through the illumination light path to form a beam size and incident angle that meet the requirements of the DMD 240 .

[0066] As shown in FIG2 , the lens 300 includes a plurality of lens assemblies, which are generally divided into three groups, namely a front group, a middle group, and a rear group, or a two-group group, namely a front group and a rear group. The front group is the lens group close to the light-emitting side of the laser projection device 10 (such as the side of the lens 300 in FIG2 away from the optical modulation component 200 in the direction N), and the rear group is the lens group close to the light-emitting side of the optical modulation component 200 (such as the side of the lens 300 in FIG2 close to the optical modulation component 200 in the opposite direction of the direction N). According to the above-mentioned various lens combinations, the lens 300 can be a telephoto lens, a zoom lens, a fixed-focus adjustable lens, or a fixed-focus lens. It should be noted that the DMD 240 is located at the rear focal plane of the lens 300.

[0067] As shown in FIG1 , the laser projection device 10 further includes a power system architecture 800. FIG1 only illustrates the approximate location of the power system architecture 800, and the specific location of the power system architecture 800 may vary in different laser projection devices 10. The power system architecture 800 includes multiple printed circuit board assemblies (PCBAs). For example, a power board, a TV (television) board, a main board (also referred to as a control board) 600, a display board 700, and the like. The multiple circuit boards are typically stacked.

[0068] It should be noted that the display panel 700 can output an image signal to the DMD 240 according to pixel information of the image to adjust the brightness or grayscale of the DMD 240 , thereby forming a projected image in conjunction with the illumination beams of different colors emitted by the light source assembly 100 .

[0069] In some embodiments, as shown in FIG1 , the laser projection device 10 further includes a heat sink 400. For example, the heat sink 400 includes a fan. The heat sink 400 is configured to dissipate heat from components within the laser projection device 10. For example, the heat sink 400 is located near the light source assembly 100 (or laser) to dissipate heat from the light source assembly 100 (or laser).

[0070] In some embodiments, as shown in FIG1 , the laser projection device 10 further includes an audio playback device 500. For example, the audio playback device 500 includes a speaker and is configured to play audio.

[0071] The lens of a laser projector is an optical device and must be protected from dust and touch. Therefore, it must be protected when the laser projector is not in use. Typically, this is done with a lens cover, typically made of plastic. However, if the user forgets to remove the lens cover after turning on the laser projector, the projection beam will hit the lens cover. In this case, the energy of the projection beam is concentrated at the lens cover, causing the lens cover to heat up due to the light. This can easily cause the lens cover to deform or even burn due to overheating, potentially leading to a fire.

[0072] To solve the above problems, some embodiments of the present disclosure provide a laser projection device 10. The laser projection device 10 can automatically detect whether the lens cover is removed to prevent the projection beam from excessively irradiating the lens cover, thereby improving the performance and reliability of the laser projection device 10.

[0073] FIG7 is a block diagram of another laser projection device according to some embodiments. As shown in FIG7 , the laser projection device 10 further includes a lens cover 22, a detection device 23 (detection module), and a controller 24 (control module). The detection device 23 may include a sensor component 231 (sensor unit).

[0074] The lens cover 22 can be placed on the lens 300 to protect the lens 300. When the laser projection device 10 needs to perform projection display, the lens cover 22 is removed from the lens 300 so that the lens 300 can project a projection beam for projection display.

[0075] The sensing component 231 may be connected to the controller 24 and configured to send a first instruction to the controller 24 in response to whether the lens cover 22 blocks the lens 300 .

[0076] The first instruction is configured to indicate a first relative position between lens cover 22 and lens 300, or a second relative position between lens cover 22 and lens 300. The first relative position may indicate when lens cover 22 is not blocking lens 300; the second relative position may indicate when lens cover 22 is blocking lens 300. For example, when lens cover 22 is blocking lens 300, the same portion of lens cover 22 may correspond to different positions of lens 300 depending on the rotation angle of lens cover 22.

[0077] It should be noted that the fact that the lens cover 22 does not block the lens 300 can also be understood as the fact that the orthographic projection of the lens cover 22 is offset from the orthographic projection of the lens 300 on a plane perpendicular to the light emitting direction of the lens 300. Furthermore, the fact that the lens cover 22 blocks the lens 300 can mean that the lens cover 22 partially blocks the lens 300, or it can also mean that the lens cover 22 completely blocks the lens 300.

[0078] The controller 24 is configured to receive the first instruction and, based on the first instruction, execute the target operation corresponding to the first instruction. The controller 24 may include a system-on-chip (SOC). It is understood that the controller 24 may also be part of a system-on-chip. In addition, the motherboard 600 may include the controller 24. For example, the controller 24 is a microcontroller unit (MCU) in the motherboard 600. Here, the MCU may also be referred to as a coprocessor of the motherboard 600.

[0079] FIG8 is a flow chart of steps performed in a laser projection device according to some embodiments. In some examples, as shown in FIG8 , the sensing component 231 and the controller 24 are configured to perform step 101 and step 102 , respectively.

[0080] In step 101 , the sensor component 231 outputs a first instruction to the controller 24 in response to whether the lens cover 22 blocks the lens 300 .

[0081] For example, when the sensor component 231 determines that the lens cover 22 blocks the lens 300, it outputs a first instruction to the controller 24 indicating the position at which the lens cover 22 blocks the lens 300. When the sensor component 231 determines that the lens cover 22 does not block the lens 300 (i.e., the lens cover and the lens are in the first relative position), it may output the first instruction to the controller 24 indicating that the lens cover 22 does not block the lens 300.

[0082] It is understood that some embodiments of the present disclosure do not limit how the lens cover 22 blocks the lens 300, nor how the sensor 231 determines whether the lens cover 22 blocks the lens 300. For example, the lens cover 22 may block the lens 300 by snapping, threading, or magnetizing.

[0083] Taking the case where a magnetic material is disposed on the lens cover 22 as an example, the sensing component 231 may be a Hall sensor to determine whether the lens cover 22 blocks the lens 300 and the position of the lens cover 22 when blocking the lens 300. The following description will be given using the case where the sensing component 231 includes a Hall sensor as an example.

[0084] In step 102 , the controller 24 receives the first instruction and executes a target operation corresponding to the first instruction according to the first instruction.

[0085] For example, the first instruction may include instruction information for indicating a target operation. The laser projection device 10 may parse the first instruction to obtain the instruction information. Taking the example of a sensor component 231 including at least one Hall sensor, the instruction information may include the output value of the at least one Hall sensor. In this case, the controller 24 in the laser projection device 10 may determine the target operation corresponding to the instruction information based on the instruction information included in the first instruction and a pre-stored mapping relationship between the instruction information and the target operation, and use this as the target operation corresponding to the first instruction.

[0086] For example, if the first instruction instructs the lens cover 22 to cover the lens 300, the target operation may be to control the light source assembly 100 of the laser projection device 10 to stop emitting a laser beam to avoid the laser beam irradiating the lens cover 22 when the lens cover 22 is not removed, thereby improving the use effect and reliability of the laser projection device 10.

[0087] In some embodiments of the present disclosure, the laser projection device 10 can output a first instruction to the controller 24 through the sensor component 231 to indicate whether the lens cover 22 is not blocking the lens 300, or the position of the lens cover 22 when blocking the lens 300, and then the controller 24 can perform a target operation based on the first instruction. In this way, the laser projection device 10 can automatically detect whether the lens cover 22 blocks the lens 300, thereby preventing the laser beam from irradiating the lens cover 22, and improving the use effect and reliability of the laser projection device 10. In addition, the position of the lens cover 22 when blocking the lens 300 can be determined through the sensor component 231, so that the laser projection device 10 can perform different target operations based on the different positions of the lens cover 22 when blocking the lens 300, thereby improving the use flexibility of the laser projection device 10.

[0088] FIG9 is a structural diagram of yet another laser projection device according to some embodiments.

[0089] In some embodiments, as shown in FIG9 , the sensor component 231 includes at least one first sensor portion 2311 (first sensor assembly) and at least one second sensor portion 2312 (second sensor assembly). The first sensor portion 2311 can be disposed around the lens 300 . The second sensor portion 2312 can be disposed on the lens cover 22 .

[0090] The first sensing portion 2311 is configured to, in response to the second sensing portion 2312 being in contact with the first sensing portion 2311, output a target value corresponding to a characteristic of the second sensing portion 2312 in contact with the first sensing portion 2311 to the controller 24. In this case, the first instruction may include at least one target value sent by the first sensing portion 2311. The target value sent by the at least one first sensing portion 2311 may be used to indicate the position of the lens cover 22 when it blocks the lens 300 (i.e., the second relative position between the lens cover 22 and the lens 300).

[0091] It should be noted that “the second sensing portion 2312 is in contact with the first sensing portion 2311 ” may mean that at least a portion of the second sensing portion 2312 is in contact with the first sensing portion 2311 .

[0092] It is understood that some embodiments of the present disclosure do not limit how the first sensing portion 2311 is disposed around the lens 300, and how the second sensing portion 2312 is disposed around the lens cover 22. Furthermore, some embodiments of the present disclosure do not limit the shapes of the first sensing portion 2311 and the second sensing portion 2312.

[0093] For example, taking the first sensing part 2311 as a Hall sensor and the second sensing part 2312 as a magnet (for example, a ring magnet) or a semi-ring, circular magnetic soft material, annular magnetic soft material, etc., the above-mentioned "characteristics of the second sensing part 2312 that is in contact with the first sensing part 2311" may refer to the magnetism of the second sensing part 2312.

[0094] Regarding the Hall effect of a Hall effect sensor, when current is applied to a semiconductor wafer and a magnetic field passes perpendicularly through the wafer, a voltage difference is generated across the wafer, which is proportional to the strength of the magnetic field. Therefore, when the lens cover 22 blocks the lens 300, the second sensing portion 2312 approaches (or, adheres to) the first sensing portion 2311, and the Hall effect sensor can output a voltage level corresponding to the magnetic field of the approaching second sensing portion 2312, which is output as a target value to the controller 24. It will be understood that the first instruction can include this voltage level.

[0095] For example, the types of the at least one first sensing unit 2311 can be the same or different. Taking the at least one first sensing unit 2311 as an example, the Hall sensor can include a Hall sensor using at least one magnetic sensing method, such as a unipolar sensing type, a latch sensing type, or an omnipolar sensing type, and the present disclosure is not limited to this.

[0096] The first sensing portion 2311 is further configured to output a first instruction to the controller 24 indicating that the lens cover 22 is not blocking the lens 300 (i.e., a first instruction indicating a first relative position between the lens cover 22 and the lens 300) in response to the first sensing portion 2311 and the second sensing portion 2312 not being in contact with each other. Here, "the first sensing portion 2311 and the second sensing portion 2312 are not in contact with each other" can be understood as the second sensing portion 2312 being away from the first sensing portion 2311.

[0097] For example, taking the first sensing portion 2311 as a Hall sensor and the second sensing portion 2312 as a magnet, when the lens cover 22 is removed, the second sensing portion 2312 on the lens cover 22 moves away from the Hall sensor, and the Hall sensor outputs another level value to the controller 24. It is understood that the first instruction may include this level value.

[0098] In this way, the first sensing portion 2311 can detect whether the second sensing portion 2312 on the lens cover 22 is close to the first sensing portion 2311, and then determine whether the lens cover 22 blocks the lens 300, thereby realizing automatic detection of whether the lens cover 22 blocks the lens 300.

[0099] In some embodiments, the number of second sensing portions 2312 can be greater than the number of first sensing portions 2311. In this case, the laser projection device 10 can further secure the lens cover 22 to the lens 300 via the second sensing portions 2312, so that the lens cover 22 can shield the lens 300. Alternatively, the number of second sensing portions 2312 can be equal to the number of first sensing portions 2311. In this case, the laser projection device 10 can secure the lens cover 22 to the lens 300 using other securing methods, which are not limited in this disclosure.

[0100] FIG10 is a structural diagram of yet another laser projection device according to some embodiments.

[0101] In some embodiments, taking the example of a case where the number of second sensing units 2312 is greater than the number of first sensing units 2311, as shown in FIG10 , the laser projection device 10 further includes a fixing member 25 (fixing module). The fixing member 25 includes at least one fixing portion 251 (fixing assembly). The fixing portion 251 can be disposed around the lens 300.

[0102] In this case, the at least one second sensing portion 2312 may also be attached to the fixing portion 251 so that the lens cover 22 blocks the lens 300 .

[0103] For example, taking the laser projection device 10 shown in FIG10 as an example, the laser projection device 10 includes three first sensing portions 2311, three fixing portions 251, and six second sensing portions 2312. The arrangement intervals of the three first sensing portions 2311 and the three fixing portions 251 on the lens 300 can be consistent with the arrangement intervals of the six second sensing portions 2312 around the lens cover 22. For example, as shown in FIG10, the three first sensing portions 2311 and the three fixing portions 251 are arranged at intervals along the circumference of the lens 300, and the six second sensing portions 2312 are arranged at intervals along the circumference of the lens cover 22.

[0104] For example, if the second sensing portion 2312 is a magnet, the fixing portion 251 can be a component such as a metal block that can be attracted to the magnet. In this way, the fixing portion 251 can be attracted to the second sensing portion 2312 to fit the lens cover 22 and the lens 300, thereby allowing the lens cover 22 to cover the lens 300.

[0105] FIG11 is a structural diagram of yet another laser projection device according to some embodiments.

[0106] In some embodiments, as shown in FIG11 , the laser projection device 10 further includes a processing unit 26 (processing module). The sensor component 231 can be connected to the controller 24 via the processing unit 26. For example, the processing unit 26 is connected between the sensor component 231 and the controller 24.

[0107] The processing unit 26 may include a processor. The processor may include a central processing unit (CPU), a microprocessor (Microprocessor), or an application specific integrated circuit (ASIC), and may be configured to perform the corresponding operations described in the processing unit 26 when the processor executes a program stored in a non-transitory computer-readable storage medium coupled to the processing unit 26. The non-transitory computer-readable storage medium may include a magnetic storage device (e.g., a hard disk, a floppy disk, or a tape), a smart card, or a flash memory device (e.g., an erasable programmable read-only memory (EPROM), a card, a stick, or a keyboard drive). Of course, the processing unit 26 may also be part of the controller 24, or the mainboard 600 may also include the processing unit 26. For example, the processing unit 26 is part of a chipset in the mainboard 600.

[0108] The processing unit 26 may be configured to receive a first instruction and a second instruction, and, based on the execution priority of the first instruction and the second instruction, send the first instruction or the second instruction to the controller 24. The second instruction is a triggered instruction different from the first instruction. For example, the second instruction may be a user-triggered instruction via a component of the laser projection device 10 other than the lens cover 22.

[0109] Accordingly, the controller 24 may also be configured to receive a first instruction or a second instruction from the processing unit 26. For example, when the controller 24 receives a first instruction from the processing unit 26, the controller 24 may execute a target operation corresponding to the first instruction. When the controller 24 receives a second instruction from the processing unit 26, the controller 24 may execute a target operation corresponding to the second instruction.

[0110] For example, the user can trigger the second instruction by using the power button of the laser projection device 10. Alternatively, the laser projection device 10 can also receive the second instruction triggered by the user through other devices that can communicate with the laser projection device 10 through Bluetooth (for example, speakers, etc.) through the Bluetooth communication module of the laser projection device 10. Alternatively, the laser projection device 10 can also receive the second instruction triggered by the user through a remote control or other device through an infrared receiving module. Of course, the triggering method of the second instruction is not limited to this, and the second instruction can also be triggered by other components.

[0111] In some embodiments, the priority of the first instruction may be higher than the priority of the second instruction. That is, when the processing unit 26 receives the first instruction and the second instruction simultaneously, it may first send the first instruction to the controller 24. Alternatively, the priority of some first instructions may be higher than the priority of the second instruction. Alternatively, the priority of any first instruction may be higher than the priority of the second instruction, which is not limited in this disclosure.

[0112] For example, if the second command received by the processing unit 26, triggered by the user via the power button or remote control, conflicts with the state of the lens cover 22 indicated by the first command, the processing unit 26 may prioritize sending the first command to the controller 24. For example, if the first command indicates that the lens cover 22 is blocking the lens 300, even if the second command indicating power on is received, the processing unit 26 may prioritize sending the first command to the controller 24, so that the controller 24 does not execute the power on operation, thereby preventing the laser beam from irradiating the lens cover 22 and causing it to overheat.

[0113] Alternatively, the priority of the first instruction may be lower than the priority of the second instruction. For example, when the processing unit 26 receives the first instruction and the second instruction at the same time, it may first send the second instruction to the controller 24. Alternatively, the priority of some first instructions may be lower than the priority of the second instruction. Alternatively, the priority of any first instruction may be lower than the priority of the second instruction, and this disclosure is not limited to this.

[0114] By setting the priority of the first instruction and the second instruction, the processing unit 26 can send the first instruction or the second instruction to the controller 24 according to the priority of the first instruction and the second instruction, so that the controller 24 can perform the corresponding target operation according to the received second instruction or the first instruction, avoiding the conflict between the first instruction and the second instruction, which may cause the laser projection device 10 to malfunction.

[0115] In some embodiments, the processing unit 26 may be further configured to: upon determining that the duration for which the indication information of the first instruction remains unchanged is greater than or equal to a preset duration, send the first instruction to the controller 24 .

[0116] It is understandable that the indication information of the first instruction may indicate that the lens cover 22 does not block the lens 300, or indicate the position of the lens cover 22 when blocking the lens 300. For example, the indication information of the first instruction may be composed of a target value sent by at least one first sensor unit 2311.

[0117] The preset duration may be pre-stored in the processing unit 26. When the duration of the first instruction remains constant for a period greater than or equal to the preset duration, the position between the lens cover 22 and the lens 300 remains stable. Therefore, the processing unit 26 may send the first instruction to the controller 24. This reduces the probability that frequent changes in the position between the lens cover 22 and the lens 300, which would result in frequent switching of the first instruction and cause an abnormality in the controller 24.

[0118] It can be understood that if the processing unit 26 determines that the duration of time for which the indication information of the first instruction remains unchanged is less than the preset duration, the position between the lens cover 22 and the lens 300 changes frequently, and the position between the lens cover 22 and the lens 300 has not yet stabilized, the processing unit 26 may not send the first instruction to the controller 24.

[0119] When the first instruction indicates the first relative position, the corresponding target operation may include: controlling the laser projection device 10 to power on, or controlling the laser projection device 10 to perform a projection display. That is, if the controller 24 determines, based on the first instruction, that the lens cover 22 does not block the lens 300, the laser beam emitted by the light source assembly 100 will not be projected onto the lens cover 22, and the laser projection device 10 can perform a power-on display. Alternatively, if, during the power-on process of the laser projection device 10, the lens cover 22 blocks the lens 300 and the laser projection device 10 stops projecting, the laser projection device 10 can continue projecting if the controller 24 determines that the lens cover 22 does not block the lens 300.

[0120] In the case where the first instruction is used for the second relative position, the corresponding target operation may include: controlling the laser projection device 10 to shut down or pause the projection. Taking the target operation including: controlling the laser projection device 10 to pause the projection as an example, the target operation may specifically include: controlling the laser projection device 10 to pause playback, mute, standby, switch to the target mode, or switch the signal source. The target mode may include: at least one of the speaker mode and the dust removal mode. Of course, in some embodiments, taking the target operation including: controlling the laser projection device 10 to pause the projection as an example, the target operation may also not include: controlling the laser projection device 10 to pause playback, mute, standby, switch to the target mode, or switch the signal source, and the present disclosure does not limit this.

[0121] The following examples introduce the mapping relationship between different target values ​​and different target operations included in the first instruction.

[0122] In some embodiments, the at least one second sensing portion 2312 may include a plurality of second sensing portions 2312. The plurality of second sensing portions 2312 may have different or the same magnetic properties.

[0123] The following description will be made by taking an example where at least some of the second sensing portions 2312 have different magnetic properties.

[0124] FIG. 12 is a partial structural diagram of a laser projection device according to some embodiments.

[0125] For example, as shown in FIG12 , the plurality of second sensing portions 2312 include three S-pole magnets and three N-pole magnets, the at least one first sensing portion 2311 includes three Hall sensors, and the at least one fixing portion 251 includes three metal blocks. The six magnets may be arranged along the circumference of the lens cover 22.

[0126] For example, six magnets can be arranged in a 60° array around the center O of the lens cover 22. The six magnets can be placed in the magnetic order of north pole, south pole, south pole, north pole, north pole, and south pole. Three Hall sensors can be arranged at intervals along the circumference of the lens 300. Three metal blocks can also be arranged at intervals along the circumference of the lens 300, with each metal block located between two adjacent Hall sensors.

[0127] In the case where the Hall sensor is a unipolar Hall sensor, assuming that when the S pole approaches, the unipolar Hall sensor can be triggered to output a low level, and the target value corresponding to the low level can be 0; when the N pole approaches, the unipolar Hall sensor can be triggered to output a high level, and the target value corresponding to the high level can be 1.

[0128] The following is an example in which the three Hall sensors of the first sensing part 2311 are respectively the first sensor 31, the second sensor 32, and the third sensor 33, and the three metal blocks of the fixing part 251 are respectively the first metal block 2511, the second metal block 2512, and the third metal block 2513, and the six magnets of the second sensing part 2312 are respectively the first magnet 41 with an S pole, the second magnet 42 with an N pole, the third magnet 43 with an S pole, the fourth magnet 44 with an S pole, the fifth magnet 45 with an N pole, and the sixth magnet 46 with an N pole.

[0129] Figure 13 is a schematic diagram of a lens cover in a first position when obstructing the lens, according to some embodiments. This first position can also be referred to as a first angle. At the first angle, the first sensor 31 corresponds to the first magnet 41, which is at its south pole. The first sensor 31 outputs a low level, and the target value corresponding to this low level is 0. The second sensor 32 corresponds to the third magnet 43, which is at its south pole. The second sensor 32 outputs a low level, and the target value corresponding to this low level is 0. The third sensor 33 corresponds to the fifth magnet 45, which is at its north pole. The third sensor 33 outputs a high level, and the target value corresponding to this high level is 1. Therefore, the first instruction may include: 001.

[0130] Figure 14 is a schematic diagram of a second position of a lens cover when obstructing the lens, according to some embodiments. As shown in Figure 14 , at the first angle, the lens cover 22 is rotated 60° clockwise to the second position, which may also be referred to as the second angle. At the second angle, the first sensor 31 corresponds to the sixth magnet 46, which has an N pole. The first sensor 31 outputs a high level, corresponding to a target value of 1. The second sensor 32 corresponds to the second magnet 42, which has an N pole. The second sensor 32 outputs a high level, corresponding to a target value of 1. The third sensor 33 corresponds to the fourth magnet 44, which has an S pole. The third sensor 33 outputs a low level, corresponding to a target value of 0. Therefore, the first instruction may include: 110.

[0131] Figure 15 is a schematic diagram of a third position of a lens cover when obstructing the lens, according to some embodiments. As shown in Figure 15 , at the second angle, the lens cover 22 continues to rotate clockwise by 60° to a third position, which may also be referred to as a third angle. At the third angle, the first sensor 31 corresponds to the fifth magnet 45, which has an N pole. The first sensor 31 outputs a high level, corresponding to a target value of 1. The second sensor 32 corresponds to the first magnet 41, which has an S pole. The second sensor 32 outputs a low level, corresponding to a target value of 0. The third sensor 33 corresponds to the third magnet 43, which has an S pole. The third sensor 33 outputs a low level, corresponding to a target value of 0. Therefore, the first instruction may include: 100.

[0132] Figure 16 is a schematic diagram of a fourth position of a lens cover when obstructing the lens, according to some embodiments. As shown in Figure 16, at the third angle, the lens cover 22 continues to rotate clockwise by 60° to the fourth position, which may also be referred to as the fourth angle. At the fourth angle, the first sensor 31 corresponds to the fourth magnet 44, which has an S pole. The first sensor 31 outputs a low level, corresponding to a target value of 0. The second sensor 32 corresponds to the sixth magnet 46, which has an N pole. The second sensor 32 outputs a high level, corresponding to a target value of 1. The third sensor 33 corresponds to the second magnet 42, which has an N pole. The third sensor 33 outputs a high level, corresponding to a target value of 1. Therefore, the first instruction may include: 011.

[0133] Figure 17 is a schematic diagram of a lens cover in the fifth position, according to some embodiments, when obstructing the lens. As shown in Figure 17, at the fourth angle, the lens cover 22 continues to rotate clockwise by 60° to the fifth position, which may also be referred to as the fifth angle. At the fifth angle, the first sensor 31 corresponds to the third magnet 43, which is at its south pole. The first sensor 31 outputs a low level, corresponding to a target value of 0. The second sensor 32 corresponds to the fifth magnet 45, which is at its north pole. The second sensor 32 outputs a high level, corresponding to a target value of 1. The third sensor 33 corresponds to the first magnet 41, which is at its south pole. The third sensor 33 outputs a low level, corresponding to a target value of 0. Therefore, the first instruction may include: 010.

[0134] Figure 18 is a schematic diagram of a lens cover in a sixth position, according to some embodiments, when obstructing the lens. As shown in Figure 18 , at the fifth angle, the lens cover 22 continues to rotate clockwise by 60° to the sixth position, which may also be referred to as the sixth angle. At the sixth angle, the first sensor 31 corresponds to the second magnet 42, which has an N pole. The first sensor 31 outputs a high level, corresponding to a target value of 1. The second sensor 32 corresponds to the fourth magnet 44, which has an S pole. The second sensor 32 outputs a low level, corresponding to a target value of 0. The third sensor 33 corresponds to the sixth magnet 46, which has an N pole. The third sensor 33 outputs a high level, corresponding to a target value of 1. Therefore, the first instruction may include: 101.

[0135] Taking the positions of the lens cover 22 when blocking the lens 300 as an example, which are the first angle to the sixth angle, the mapping relationship between the position of the lens cover 22 when blocking the lens 300 indicated by the first instruction and the target operation can be shown in the following Table 1:

[0136] Table 1

[0137] "Turning off the screen" may refer to controlling the laser projection device 10 to pause projection. "Pause playback" may refer to controlling the playback of the video to pause. The speaker mode may be used to use the laser projection device 10 as a speaker. The speaker mode may be understood as turning off some display functions of the laser projection device 10, while the speaker and components supporting the speaker playback function continue to work. It is understandable that the present disclosure does not limit how the laser projection device 10 performs standby, or how the laser projection device 10 performs dust removal in the dust removal mode. The way the laser projection device 10 enters the standby state and the way dust is removed may refer to any known implementation method, which will not be described in detail here. For example, the dust removal mode may clean or dustproof any component in the laser projection device 10, and the component is not limited to the lens 300.

[0138] If the target operation includes switching the signal source, the controller 24 may be configured to execute the target operation of switching the signal source when, based on the first instruction, the target operation includes switching the signal source, and when, based on a first instruction subsequent to the first instruction, the lens cover 22 and the lens 300 are determined to be in the first relative position. For example, using the mapping relationship shown in Table 1 as an example, the controller 24 may determine that the target operation of switching the signal source is executed when the first instruction includes a target value of 010, and the first instruction subsequent to the first instruction includes a target value of 000.

[0139] In this way, after determining that the lens cover 22 does not block the lens 300, the signal source can be switched using the above method, avoiding overheating of the lens cover 22 when performing projection display after switching the signal source, thereby improving the use effect and reliability of the laser projection device 10 after the signal source is switched.

[0140] It should be noted that the arrows pointing to the magnets in FIG. 13 to FIG. 18 represent different positions of the same magnet during the rotation of the lens cover 22 .

[0141] In some embodiments, the first instruction may also be used to indicate whether the lens cover 22 is fastened to the lens 300. For example, the second sensing portions 2312 on the lens cover 22 have the same magnetic properties.

[0142] Figure 19 illustrates another partial structural diagram of a laser projection device according to some embodiments. As shown in Figure 19 , the at least one first sensing portion 2311 includes one first sensing portion 2311, and the at least one fixing portion 251 includes five fixing portions 251. The first sensing portion 2311 and the five fixing portions 251 are arranged 60° apart along the circumference of the lens 300. The first sensing portion 2311 is a Hall effect sensor, which can be an omnipolar sensing type sensor. The five fixing portions 251 can be metal blocks.

[0143] Correspondingly, the at least one second sensing portion 2312 includes six second sensing portions 2312. The six second sensing portions 2312 are arranged at intervals of 60 degrees along the circumference of the lens cover 22 and are magnets.

[0144] When the lens cover 22 is brought close to the lens 300, the magnets can attract the corresponding metal block, and one of the six magnets can approach the Hall sensor, causing the Hall sensor to output a first instruction including a high level to the processing unit 26, indicating that the lens 300 is engaged with the lens cover 22. The processing unit 26 can output this first instruction to the controller 24. After receiving this first instruction, the controller 24 can perform the corresponding target operation. For example, the controller 24 can output an instruction to pause the projection display and turn off the light source assembly 100, thereby automatically turning off the light source assembly 100 of the laser projection device 10.

[0145] When the lens cover 22 is removed, the magnet moves away from the Hall sensor, and the Hall sensor outputs a first low-level instruction to indicate that the lens 300 is not engaged with the lens cover 22. After receiving the low-level first instruction, the controller 24 can resume the projection display of the laser projection device 10 and turn on the light source assembly 100, so that the laser projection device 10 can automatically resume normal operation.

[0146] Fig. 20 is a structural diagram of another laser projection device according to some embodiments. It should be noted that the Hall sensor feedback signal in Fig. 20 is the first instruction mentioned above.

[0147] In some embodiments, as shown in FIG20 , the laser projection device 10 further includes an indicator light 27. The indicator light 27 is configured to indicate the position (e.g., the first relative position or the second relative position) between the lens cover 22 and the lens 300. In this case, the controller 24 is further configured to control the indicator light 27 to illuminate upon receiving a first instruction indicating the second relative position. For example, if the controller 24 determines, based on the first instruction, that the lens cover 22 obstructs the lens 300, the controller 24 controls the indicator light 27 to illuminate.

[0148] It is understandable that the present disclosure does not limit the installation position of the indicator light 27 on the laser projection device 10 , nor the specific implementation method of the controller 24 controlling the lighting of the indicator light 27 .

[0149] By lighting up the control indicator light 27 when it is determined that the lens cover 22 blocks the lens 300, the user can be reminded that the current lens cover 22 blocks the lens 300, and then the user can be reminded to remove the lens cover 22 so that the laser projection device 10 can operate normally, thereby improving the use effect and reliability of the laser projection device 10.

[0150] The following description will be made by taking as an example that the sensing component 231 includes a first sensing portion 2311 , and the lens 300 and the lens cover 22 include the structure shown in FIG. 19 .

[0151] In some embodiments, as shown in FIG. 20 , the laser projection device 10 further includes: a power supply unit 28 (power module), a display control unit 29 (display control module), a power button 900 , and a receiver 1000 .

[0152] The power supply unit 28 is connected to the processing unit 26 , the display control unit 29 , and the light source unit 100 , and is configured to supply power to the processing unit 26 , the display control unit 29 , and the light source unit 100 .

[0153] The display control unit 29 (e.g., a display panel) is connected to the controller 24 and the light source assembly 100. The controller 24 controls the light source assembly 100 via the display control unit 29 to emit a laser beam, thereby achieving projection display. It should be noted that the controller 24 controlling the light source assembly 100 via the display control unit 29 can be implemented by referring to any known projection display method and will not be further described here.

[0154] The power button 900 may include a power button and a power button. The power button is used to turn on the laser projector 10, and the power button is used to turn off the laser projector 10. Of course, the power button and the power button may also be a single button. For example, if the laser projector 10 is off, pressing the power button 900 will turn it on; if the laser projector 10 is on, pressing the power button 900 will turn it off.

[0155] The receiver 1000 can be connected to a terminal device such as a remote controller or a mobile phone via an infrared communication protocol, a Bluetooth communication protocol or other communication protocols to receive a control signal sent by a user via the terminal device.

[0156] 21 is another flow chart of steps performed in a laser projection device according to some embodiments.

[0157] Based on the laser projection device 10 shown in FIG. 20 , as shown in FIG. 21 , the power-on steps of the laser projection device 10 include steps 1001 to 1004 .

[0158] In step 1001 , the laser projection device 10 is turned on via the remote control or the power button 900 .

[0159] In step 1002, it is determined whether the Hall sensor in the detection device 23 outputs a low level. If so, step 1003 is executed; if not, step 1004 is executed.

[0160] In step 1003 , the laser projection device 10 is controlled to start up.

[0161] In step 1004 , the laser projection device 10 is temporarily powered on and the indicator light 27 is controlled to light up.

[0162] The user can control the laser projection device 10 to turn on using the remote control or the power button 900 on the laser projection device 10. The controller 24 then determines whether the Hall sensor in the detection device 23 outputs a low level. If so, the controller 24 determines that the lens cover 22 has been removed and can control the laser projection device 10 to turn on. If not, the controller 24 determines that the lens cover 22 has not been removed and can pause the startup and control the indicator light 27 to illuminate.

[0163] The following description will be made by taking as an example that the sensing component 231 includes a plurality of first sensing portions 2311 , and the lens 300 and the lens cover 22 include the structure shown in FIG. 12 .

[0164] FIG22 is a structural diagram of yet another laser projection device according to some embodiments.

[0165] 22 , the processing unit 26 is configured to obtain a feedback signal (i.e., a target value) from the first sensor 31, a feedback signal from the second sensor 32, and a feedback signal from the third sensor 33. The feedback signals from the multiple sensors may constitute the first instruction.

[0166] In this case, the processing unit 26 may have a priority processing function and a delay processing function.

[0167] For example, the command sent by the power button 900 and the command received by the receiver 1000 may conflict with the state of the lens cover 22. In this case, the processing unit 26 can perform priority control to implement a priority processing function. For example, if the lens cover 22 covers the lens 300, if the power button is pressed, the processing unit 26 will prioritize the state of the lens cover 22 and activate the indicator light 27 to indicate that the lens 300 is covered by the lens cover 22 without performing the power-on operation.

[0168] Regarding the delayed processing function, if the user quickly rotates the lens cover 22, the three Hall sensors rapidly output multiple different first commands to the processing unit 26. In this case, to prevent the laser projection device 10 from frequently switching based on the multiple first commands input, which could cause anomalies, the processing unit 26 can delay the input first commands and output the last input, unchanged first command, as the final first command to the controller 24.

[0169] It should be noted that in some embodiments of the present disclosure, the power button 900 and the receiver 1000 can be connected to the processing unit 26, and then connected to the controller 24 through the processing unit 26. The Hall sensor in the detection device 23 is also connected to the processing unit 26. In this way, the processing unit 26 can uniformly process the system status and output the confirmed status to the controller 24.

[0170] FIG23 is another flowchart of steps executed in a laser projection device according to some embodiments. Based on the laser projection device 10 shown in FIG22 , as shown in FIG23 , the processing unit 26 can receive a power-on signal or a first instruction output by multiple Hall sensors. After the processing unit 26 receives the first instruction, it can read the target values ​​of the first sensor 31, the second sensor 32, and the third sensor 33 and assign the target values ​​to the variable STAT. The processing unit 26 then determines the first instruction corresponding to the variable STAT in Table 1 and, through the controller 24, determines the target operation corresponding to the first instruction.

[0171] During this process, the processing unit 26 can also determine whether the duration of the variable STAT being unchanged is greater than or equal to the preset duration under corresponding circumstances. If so, the processing unit 26 synchronizes the first instruction to the controller 24 so that the target operation corresponding to the first instruction is executed through the controller 24. If not, the processing unit 26 does not send the first instruction to the controller 24. For example, as shown in Figure 23, if the variable STAT is equal to 001, and the duration of STAT being equal to 001 is greater than or equal to the preset duration, the controller 24 performs a shutdown operation; if the variable STAT is not equal to 001, the processing unit 26 determines whether the variable STAT is equal to 110; if the duration of the variable STAT being equal to 001 is less than the preset duration, the processing unit 26 re-determines which target value the variable STAT is equal to.

[0172] In some embodiments of the present disclosure, the lens cover 22 is fastened in a magnetic adsorption manner, which can achieve automatic positioning, improve the convenience of the fastening operation, and improve the use effect of the laser projection device 10. In the above manner, the lens cover 22 does not need to be accurately positioned when fastened to the lens 300, and can achieve automatic suction positioning. In this way, the laser projection device 10 can automatically detect the fastening state of the lens cover 22 when it is turned on. If the lens cover 22 is in the fastening state, the light source assembly 100 can be turned off and a prompt can be given, thereby avoiding the energy concentration of the projection light beam at the lens 300, which causes the lens cover 22 to overheat and deform and cause a fire, thereby improving the use effect and reliability of the laser projection device 10.

[0173] Furthermore, the laser projection device 10 can also identify the angle at which the lens cover 22 is engaged with the lens 300, thereby enabling functions such as light protection, mute, video pause, power on / off, screen off, and speaker off. This allows multiple operations to be performed simply by rotating the lens cover 22 without opening it, eliminating the need for an additional remote control device, thereby increasing the flexibility of the laser projection device 10.

[0174] In addition, by using the processing unit 26 to connect to the Hall sensor, the power button 900, and the receiver 1000, the control method of the system can have a priority control logic, thereby improving the stability and reliability of the laser projection device 10 during use.

[0175] Figure 24 is a structural diagram of another laser projection device according to some embodiments. Figure 25 is a flow chart of the laser projection device startup process according to some embodiments. Figure 26 is a flow chart of the laser projection device usage process according to some embodiments. It should be noted that the structure and function of the various components of the laser projection device in Figure 24 can be referred to in the relevant content above.

[0176] The following describes the startup process and usage process of the laser projection device in some solutions using the laser projection device shown in FIG24 .

[0177] As shown in Figure 25, after receiving the power-on signal, the controller 24 detects whether the lens cover 22 has been removed using the detection device 23. If it is determined that the lens cover 22 has not been removed, the controller 24 can enter a standby state, and the power supply unit 28 is controlled to stop powering the display control unit 29. In addition, the light source assembly 100 (such as the laser in the light source assembly 100) is controlled to stop emitting light to prevent the projection beam from impinging on the lens cover 22, causing the lens cover 22 to deform due to overheating or even spontaneous combustion. During the standby state of the laser projection device 10, if the controller 24 determines through the detection device 23 that the lens cover 22 has been removed, the laser projection device 10 can be powered on normally. Here, the power-on signal can be a signal sent by the user to the laser projection device 10 via a terminal device, or a signal generated by the user pressing a relevant button on the laser projection device 10. For example, the power-on signal can be triggered by the user using a remote control or the power button 900.

[0178] As shown in FIG26 , after the laser projection device 10 is powered on and in use, the controller 24 can detect whether the lens cover 22 has been removed using the detection device 23. If the lens cover 22 is not removed, the controller 24 can enter a standby mode, control the power supply unit 28 to stop powering the display control unit 29, and control the light source assembly 100 to stop emitting light. This prevents the projection beam from impinging on the lens cover 22, which could cause deformation or even spontaneous combustion due to overheating. If the lens cover 22 is removed, the controller 24 can continue the projection display.

[0179] As shown in Figures 25 and 26, the controller 24 can continue to detect whether the lens cover 22 has been removed through the detection device 23 in the standby state. When it is detected that the lens cover 22 has been removed, the laser projection device 10 needs to switch from the standby state to the working state to perform projection display.

[0180] However, the laser projection device 10 takes a long time to switch from the standby state to the operating state.

[0181] For example, as shown in Figures 25 and 26 , the process of switching the laser projection device 10 from standby mode to active mode includes the following: First, the controller 24 must return from standby mode to active mode. After the controller 24 returns to active mode, it controls the power supply unit 28 to power on the display control unit 29. After powering on, the display control unit 29 initializes. Only after the display control unit 29 is initialized can the controller 24 transmit image or video signals to the display control unit 29 and cause the light source assembly 100 to emit light to project the image or video.

[0182] To address the above issues, in some embodiments, when the lens cover 22 blocks the lens 300, the display control unit 29 can be kept receiving the pending image signal or video signal, thereby improving the efficiency of the laser projection device 10 switching from a non-projection display state to a projection display state. The above process is described below.

[0183] FIG27 is a structural diagram of yet another laser projection device according to some embodiments.

[0184] In some embodiments, as shown in FIG27 , the laser projection device 10 includes a lens 300 , a lens cover 22 , a laser 221 , a controller 24 , and a display unit 30 (display module). The laser 221 and the display unit 30 may be connected to the controller 24 .

[0185] The display unit 30 includes a light modulation device 202 (eg, a digital micromirror device 240 ) and is configured to modulate an incident laser beam according to an image signal to form the projection beam.

[0186] The connection method between the lens cover 22 and the lens 300 can be found in the relevant content above and will not be repeated here.

[0187] The laser 221 is configured to emit a laser beam. The laser 221 can be a monochromatic laser or a multicolor (e.g., three-color) laser, which is not limited in this disclosure. It should be noted that the light source assembly 100 includes the laser 221 to achieve the display of the subsequent projected image through the laser beam emitted by the laser 221.

[0188] It is understood that the present disclosure does not limit whether the laser projection device 10 further includes other components. For example, the laser projection device 10 further includes a power supply unit 28 for supplying power to the various components of the laser projection device 10 .

[0189] 28 is a flow chart illustrating steps performed by a controller in a laser projection device according to some embodiments.

[0190] In some embodiments, as shown in FIG. 28 , the controller 24 is configured to perform steps 301 and 302 :

[0191] In step 301 , in response to the lens cover 22 blocking the lens 300 , a first image signal is output to the display unit 30 , and the lens 300 is controlled to stop projecting a projection light beam.

[0192] In step 302, in response to the lens cover 22 changing from blocking the lens 300 to the first relative position, the second image signal is output to the display unit 30, and the laser 221 is controlled to emit light so that the display unit 30 modulates the projection light beam projected onto the lens 300 based on the second image signal for projection display.

[0193] The first image signal and the second image signal can be image signals acquired in real time by the laser projection device 10 (or the controller 24), for example, any content such as a video stream or an image that can be projected and displayed by the laser projection device 10, and the present disclosure does not limit this. In addition, the present disclosure does not limit how the laser projection device 10 acquires the first image signal and the second image signal. For example, the laser projection device 10 can receive the first image signal and the second image signal from other devices through the controller 24. Alternatively, the first image signal and the second image signal can also be pre-stored in the controller 24.

[0194] Alternatively, the first image signal and the second image signal may be of different types. For example, the first image signal may be a preset image, such as a black image (also referred to as a black chart). The second image signal may be an image signal acquired in real time by the laser projection device 10.

[0195] For example, the laser projection device 10 may further include a detection device 23, which may be connected to the controller 24 to detect whether the lens cover 22 blocks the lens 300. The structure and function of the detection device 23 may be referred to in the above related content and will not be repeated here.

[0196] In this way, the controller 24 can determine whether the lens cover 22 blocks the lens 300 through the detection device 23. If it is determined that the lens cover 22 blocks the lens 300, the controller 24 outputs the first image signal to the display unit 30 and controls the lens 300 to stop projecting the projection light beam. For example, when the lens cover 22 blocks the lens 300, the controller 24 continues to control the power supply unit 28 to supply power to the display unit 30, continues to output the first image signal to the display unit 30, and controls the lens 300 to stop projecting the projection light beam.

[0197] After determining through the detection device 23 that the lens cover 22 blocks the lens 300, the controller 24 may further detect through the detection device 23 whether the lens cover 22 blocks the lens 300. If the lens cover 22 changes from blocking the lens 300 to not blocking the lens 300, the controller 24 may execute step 302 to control the display unit 30 to project a projection light beam through the lens 300 based on the second image signal, thereby performing projection display.

[0198] In some embodiments of the present disclosure, when the lens cover 22 blocks the lens 300, the controller 24 stops the lens 300 from projecting a projection beam, thereby preventing the projection beam from being projected onto the lens cover 22, thereby improving the performance and reliability of the laser projection device 10. Furthermore, by continuously outputting the first image signal to the display unit 30, there is no need to control the display unit 30 to enter a standby state. This allows the display unit 30 to be projected based on the second image signal when the lens cover 22 is removed, without requiring initialization. This improves the efficiency of the laser projection device 10 in resuming display, thereby enhancing the performance of the laser projection device 10.

[0199] In some embodiments, taking the first image signal and the second image signal as image signals acquired in real time by the laser projection device 10 as an example, the controller 24 can be configured to control the laser 221 to stop emitting light to the display unit 30, thereby causing the lens 300 to stop projecting the projection beam. For example, the controller 24 controls the laser 221 to stop emitting light through the display driver circuit.

[0200] The controller 24 may also be configured to control the laser 221 to emit light in response to the lens cover 22 changing from blocking the lens 300 to unblocking the lens 300, causing the display unit 30 to project a projection beam through the lens 300 based on the second image signal for projection display. For example, the controller 24 may control the laser 221 to emit light via a display driver circuit. It will be appreciated that the specific implementation of the display unit 30 performing projection display based on the second image signal can be referenced above and will not be further elaborated here.

[0201] In some embodiments, taking the case where the first image signal is a preset image and the second image signal is an image signal acquired in real time by the laser projection device 10 as an example, the controller 24 can be configured to control the display unit 30 to display the preset image, causing the display unit 30 to stop projecting the projection beam toward the lens 300, thereby causing the lens 300 to stop projecting the projection beam. For example, the controller 24 can control the display unit 30 to display the preset image, causing the display unit 30 to stop projecting the projection beam.

[0202] The preset image may be pre-stored in the controller 24 .

[0203] For example, the preset image can be a black image. By outputting this black image to the display unit 30, the display unit 30 can respond to the black grayscale value of the preset image without projecting a projection beam toward the lens 300. As a result, the projection beam will not be projected onto the lens cover 22, thereby improving the performance and reliability of the laser projection device 10. Alternatively, in some embodiments, the preset image can be an image with a color close to black to reduce the heat of the projection beam projected onto the lens cover 22.

[0204] It is understood that the present disclosure does not limit the application scenarios of the above-mentioned control method. For example, this control method can be applied to the startup process of the laser projection device 10, or the use process after startup. When this control method is applied during the startup process of the laser projection device 10, the laser projection device 10 can promptly respond to the lens cover 22 blocking the lens 300 and control the lens 300 to stop projecting the projection beam, thereby improving the performance and reliability of the laser projection device 10 during the startup process.

[0205] Furthermore, during the startup process, if the lens cover 22 is removed, compared to the slow recovery startup process in some solutions, some embodiments of the present disclosure improve the startup efficiency of the laser projection device 10.

[0206] For example, during the use process after powering on, the laser projection device 10 can promptly respond to the lens cover 22 blocking the lens 300 and control the lens 300 to stop projecting the projection beam, thereby improving the performance and reliability of the laser projection device 10 during the power-on process. Furthermore, when the lens cover 22 is removed, compared to the slow recovery of the projection display in some solutions, some embodiments of the present disclosure improve the efficiency of the laser projection device 10 in resuming the projection display.

[0207] The following describes how the laser projection device 10 determines whether the lens cover 22 changes from blocking the lens 300 to not blocking the lens 300:

[0208] In some embodiments, the controller 24 is configured to: start timing in response to the lens cover 22 blocking the lens 300; if the duration for which the lens cover 22 blocks the lens 300 is less than a preset duration, and the lens cover 22 changes from blocking the lens 300 to the first relative position, control the display unit 30 to project a projection light beam through the lens 300 based on the second image signal.

[0209] For example, the controller 24 can control the display unit 30 to project a projection light beam through the lens 300 based on the second image signal when the lens cover 22 is removed (i.e., the lens cover 22 changes from blocking the lens 300 to not blocking the lens 300) within a preset time period after determining that the lens cover 22 blocks the lens 300.

[0210] In some embodiments, the laser projection device 10 may include a timing module, and the controller 24 may perform timing through the timing module.

[0211] In some embodiments, the preset duration may be pre-stored in the laser projection device 10 .

[0212] Alternatively, the controller 24 may be configured to receive a preset duration input. For example, the controller 24 may receive a user's configuration of the preset duration. For example, the controller 24 may receive and store the user's input of the preset duration. In this way, the laser projection device 10 can implement this control method based on the user's configuration, thereby increasing the flexibility of the control method and further improving the performance of the laser projection device 10.

[0213] Alternatively, the controller 24 may also be configured to obtain historical usage data of the laser projection device 10 and determine the preset duration based on the historical usage data.

[0214] The historical usage data may include the duration between when the user turns off and on the laser projection device 10 in the historical records. For example, the controller 24 may record the duration between when the user turns off and on the laser projection device 10 each time the user uses the laser projection device 10.

[0215] For example, the controller 24 is configured to take the average of multiple durations corresponding to the user, “between when the user turns off the laser projection device 10 and when the user turns on the laser projection device 10 in the historical records”, as the preset duration.

[0216] Through the above method, the laser projection device 10 can determine the preset duration based on the user's historical behavioral habits of using the laser projection device 10, so that the preset duration is consistent with the user's habits of using the laser projection device 10, further improving the use effect of the laser projection device 10.

[0217] In some embodiments, the controller 24 may be further configured to enter a standby state if the duration for which the lens cover 22 blocks the lens 300 is greater than or equal to the preset duration and the lens cover 22 continues to block the lens 300 .

[0218] If the lens cover 22 is not removed within a preset time period after the lens cover 22 blocks the lens 300 , the controller 24 may enter a standby state.

[0219] In some embodiments, the process of controller 24 entering the standby mode may include at least one of controlling power supply unit 28 to stop supplying power to display unit 30, stopping outputting the first image signal to display unit 30, or controlling laser 221 to stop emitting light. Alternatively, the specific implementation of controller 24 entering the standby mode may refer to any known method for controller 24 to enter the standby mode. For example, the standby mode of controller 24 is similar to the standby mode of a computer. Controller 24 stores the current operating state in a corresponding memory and maintains minimal operation at a low-power voltage.

[0220] In some embodiments of the present disclosure, within a preset time period after the lens cover 22 blocks the lens 300, if the lens cover 22 is not removed, the controller 24 can enter a standby state. It is understandable that the above-mentioned process of entering the standby state can also be referred to as entering a true standby state. Within a preset time period after the lens cover 22 blocks the lens 300, if the lens cover 22 is removed, it indicates that the user needs the laser projection device 10 to perform projection display, so the controller 24 can control the laser 221 to emit light. In this case, since the controller 24 has not yet entered the standby state, the laser projection device 10 can quickly perform projection display, thereby improving the efficiency of the laser projection device 10 in resuming projection display.

[0221] In some embodiments, when the laser projection device 10 includes a power supply unit 28, the power supply unit 28 may be connected to the display unit 30 and configured to supply power to the display unit 30. Thus, the controller 24 may be further configured to: if the lens cover 22 blocks the lens 300 for a duration greater than or equal to the preset duration, control the power supply unit 28 to stop supplying power to the display unit 30; and if the lens cover 22 blocks the lens 300 for a duration less than the preset duration, control the power supply unit 28 to continue supplying power to the display unit 30.

[0222] For example, when the lens cover 22 blocks the lens 300 for a predetermined period of time, the controller 24 may output a command to the power supply unit 28 to instruct the display unit 30 to stop supplying power. The power supply unit 28 may respond to the command and stop supplying power to the display unit 30.

[0223] By controlling the power supply unit 28 to stop supplying power to the display unit 30, the display unit 30 can be powered off when the lens cover 22 is not removed after a preset period of time after the lens cover 22 covers the lens 300, thereby saving energy consumption of the laser projection device 10 in this state.

[0224] FIG29 is a structural diagram of yet another laser projection device according to some embodiments.

[0225] In some embodiments, as shown in FIG. 29 , the heat dissipation device 400 and the audio playback device 500 included in the laser projection device 10 may be connected to the controller 24 .

[0226] In this case, the controller 24 may also be configured to, in response to the lens cover 22 blocking the lens 300, control the heat dissipation device 400 to stop operating and control the audio playback device 500 to pause playing audio. The controller 24 may also be configured to, in response to the lens cover 22 blocking the lens 300 for a duration less than a preset duration and the lens cover 22 changing from blocking the lens 300 to the first relative position, control the heat dissipation device 400 to dissipate heat and control the audio playback device 500 to play audio.

[0227] For example, taking the heat dissipation device 400 as a fan for dissipating heat for the laser 221, when the lens cover 22 blocks the lens 300 and the laser 221 stops emitting light, the temperature of the laser 221 decreases and there is no need to dissipate heat for the laser 221. Therefore, when the lens cover 22 blocks the lens 300, the controller 24 can control the heat dissipation device 400 to stop running, thereby improving the use effect and reliability of the laser 221 while reducing the energy consumption of the laser projection device 10, and reducing the use noise of the laser projection device 10 when the projection beam is stopped through the lens 300.

[0228] In some embodiments of the present disclosure, when the lens cover 22 blocks the lens 300, for example, when the laser 221 stops emitting light, the heat dissipation device 400 is controlled to stop operating and the audio playback device 500 is controlled to pause audio playback, so that the laser projection device 10 simultaneously remains without projection, audio playback, or heat dissipation, thereby reducing the energy consumption of the laser projection device 10 and improving the performance and reliability of the laser projection device 10. When the duration that the lens cover 22 blocks the lens 300 is less than a preset duration, and the lens cover 22 changes from blocking the lens 300 to not blocking the lens 300, the heat dissipation device 400 is controlled to dissipate heat and the audio playback device 500 is controlled to play audio, so that the laser projection device 10 can simultaneously resume projection, audio playback, and heat dissipation, thereby improving the performance and reliability of the laser projection device 10 and enabling the simultaneous restoration of display and audio, further improving the performance and reliability of the laser projection device 10.

[0229] In some embodiments, the controller 24 may also be configured to receive a user's configuration regarding whether to enable a quick exit standby function for the laser projection device 10. For example, the controller 24 may execute the aforementioned control flow in response to the user's configuration regarding enabling a quick exit standby function.

[0230] The controller 24 can also be configured to respond to the user turning off the function of quickly exiting the standby state to perform any method of the laser projection device 10 entering the standby state and exiting the standby state (such as Figures 25 and 26).

[0231] In this way, the user can actively configure whether to execute the above control process, which improves the flexibility of the execution of the control process and further improves the use effect of the laser projection device 10.

[0232] FIG30 is a structural diagram of yet another laser projection device according to some embodiments.

[0233] In some embodiments, taking the example of the controller 24 controlling the laser 221 to stop emitting light to the display unit 30, thereby causing the display unit 30 to stop projecting a projection beam through the lens 300, as shown in FIG30 , the laser projection device 10 includes a light source assembly 100, a controller 24, a detection device 23, a display control unit 29, a display unit 30, a power supply unit 28, and a heat sink 400. The power supply unit 28 can provide power to the light source assembly 100, the controller 24, the display control unit 29, and the display unit 30. The detection device 23 can be connected to the controller 24, and the display control unit 29 can be connected to the heat sink 400 so that the heat sink 400 dissipates heat from the laser 221 in the light source assembly 100. Furthermore, the controller 24 is connected to the display unit 30 via the display control unit 29, so that the display control unit 29 can control the display unit 30 to modulate the laser beam into a projection beam based on image and video signals sent by the controller 24, thereby displaying an image.

[0234] It is understandable that the power supply unit 28 may also be connected to the display unit 30 to provide power to the display unit 30 .

[0235] Figure 31 is another flowchart of the process of starting up a laser projection device according to some embodiments. Figure 32 is another flowchart of the process of using the laser projection device according to some embodiments.

[0236] Based on the laser projection device 10 in FIG. 30 , as shown in FIG. 31 , the controller 24 is configured to execute steps 401 to 413 .

[0237] In step 401, a power-on signal is obtained.

[0238] In step 402 , it is determined whether the output level of the first sensing unit 2311 (eg, a Hall sensor) is a low level. If so, step 403 is executed; if not, step 411 is executed.

[0239] In step 403 , the laser 221 is controlled to stop emitting light.

[0240] In step 404, the power supply unit 28 is controlled to power on the display unit 30 and send a third command to the display control unit 29. The third command is configured to instruct the heat dissipation device 400 to suspend operation. It will be understood that while the power supply unit 28 is supplying power to the display unit 30, it also needs to supply power to the display control unit 29. Of course, in some embodiments, the controller 24 may also send control instructions directly to the heat dissipation device 400, eliminating the need for the display control unit 29 to control the heat dissipation device 400.

[0241] In step 405 , the image and video continue to be sent to the display control unit 29 , and the audio playback device 500 is controlled to be muted.

[0242] Here, the process from step 402 to step 405 indicates that the laser projection device 10 turns off the screen during the startup process. In this case, the laser projection device 10 can also prompt the user to block the lens 300 with the lens cover 22.

[0243] In step 406, it is determined whether the output level of the first sensor unit 2311 is high within a preset time period. If so, step 407 is executed; if not, step 410 is executed.

[0244] In step 407 , a fourth command is sent to the display control unit 29 .

[0245] The fourth command is configured to instruct the heat dissipation device 400 to operate to dissipate heat.

[0246] In step 408, the laser 221 is controlled to emit light to display a projected image. It should be noted that, at this time, the audio playback device 500 receives an audio signal and plays the audio.

[0247] In step 409 , a standby command is sent to the display unit 30 .

[0248] In step 410, standby.

[0249] In step 411 , image, video, and audio signals are transmitted to the display control unit 29 .

[0250] In step 412 , a fourth instruction is sent to the display control unit 29 .

[0251] In step 413 , the laser 221 is controlled to emit light, and the audio playing device 500 plays the audio.

[0252] During the power-on process, the controller 24 can detect the level state of the output of the first sensor 2311 disposed around the lens 300. A high level indicates that the lens cover 22 does not block the lens 300, and a low level indicates that the lens cover 22 blocks the lens 300.

[0253] If the output of the first sensor 2311 is low, the lens cover 22 blocks the lens 300. At this point, the laser 221 can stop emitting light, the display control unit 29 and the display unit 30 can continue to be powered on, the heat dissipation device 400 (e.g., a fan) and the audio playback device 500 can be paused, and the controller 24 can continue to output images or videos to the display control unit 29. For example, the controller 24 can send a third instruction to the display control unit 29 via a universal serial bus (USB) to pause the operation of the heat dissipation device 400. The controller 24 can also stop outputting audio signals to the audio playback device 500, thereby controlling the audio playback device 500 to stop playing audio.

[0254] The controller 24 can time a preset time (for example, 5 minutes) and detect whether the Hall sensor outputs a high level within the preset time to determine whether the lens cover 22 is removed. If so, the controller 24 can send a fourth command to the display control unit 29 via USB to enable the heat dissipation device 400 to dissipate heat, and control the laser 221 to emit light to display the projected image, and control the audio playback device 500 to play audio, thereby eliminating the need to wait for a long time and improving the efficiency of restoring the display. If not, the controller 24 can send a standby command to the display unit 30 via USB, and the display unit 30 is on standby and the controller 24 is on standby. For example, the controller 24 controls the display unit 30 to be on standby through the display control unit 29. It can be understood that when the display unit 30 and the controller 24 are on standby, the display control unit 29 is also in a low-power standby state. At this time, the transmission of image signals and power supply signals to the display unit 30 is stopped. Of course, the present disclosure is not limited to this.

[0255] If the output of the first sensor 2311 is high, the lens cover 22 does not block the lens 300. In this case, the controller 24 transmits the image or video and audio signals to the display control unit 29 as normal; sends a fourth command to the display control unit 29 via USB to enable the heat dissipation device 400 to dissipate heat; and controls the laser 221 to emit light to project the image or video and controls the audio playback device 500 to play audio.

[0256] As shown in FIG32 , the control steps of the use process of the laser projection device 10 after powering on are the same as steps 402 to 413 , and are not described again here.

[0257] Some embodiments of the present disclosure also provide a method for controlling a laser projection device. This method is applicable to the laser projection device. The structure of the laser projection device is similar to the laser projection device 10 described above and will not be described in detail here.

[0258] In some embodiments, the method includes: outputting a first instruction via a sensing component in response to whether the lens cover blocks the lens; receiving the first instruction via a controller, and executing a target operation corresponding to the first instruction according to the first instruction.

[0259] The first instruction is configured to indicate a first relative position between the lens cover and the lens, or to indicate a second relative position between the lens cover and the lens, wherein the second relative position represents a position where the lens cover blocks the lens.

[0260] In some embodiments, the method further includes: receiving a first instruction and a second instruction; sending the first instruction or the second instruction to the controller via the processing unit based on the priority of the first instruction and the second instruction; and receiving the first instruction or the second instruction from the processing unit via the controller. The second instruction is a triggered instruction different from the first instruction.

[0261] In some embodiments, the method further includes: when it is determined that the duration for which the indication information of the first instruction remains unchanged is greater than or equal to a preset duration, sending the first instruction to the controller.

[0262] Some embodiments of the present disclosure also provide a method for controlling a laser projection device. This method is applicable to the laser projection device. The structure of the laser projection device is similar to the laser projection device 10 described above and will not be described in detail here.

[0263] In some embodiments, the method includes: in response to a lens cover blocking the lens, outputting a first image signal to a display unit and controlling the lens to stop projecting a light beam; and in response to the lens cover changing from blocking the lens to a first relative position, outputting a second image signal to the display unit and controlling a laser to emit light so that the display unit modulates a projection light beam directed to the lens based on the second image signal for projection display. The first relative position indicates that, on a plane perpendicular to the light emission direction of the lens, the orthographic projection of the lens cover is offset from the orthographic projection of the lens.

[0264] In some embodiments, controlling the lens to stop projecting the projection beam includes: controlling a laser to stop emitting light to a display unit, thereby causing the lens to stop projecting the projection beam; or controlling the display unit to display a preset image, thereby causing the lens to stop projecting the projection beam via the display unit. Here, the first image signal includes a preset image, which is a black image.

[0265] In some embodiments, the method further includes: in response to the lens cover blocking the lens, starting timing; if the duration for which the lens cover blocks the lens is less than a preset duration, and the lens cover changes from blocking the lens to a first relative position, controlling the display unit to project a projection light beam through the lens based on a second image signal; if the duration for which the lens cover blocks the lens is greater than or equal to the preset duration, and the lens cover continues to block the lens, entering a standby state.

[0266] In some embodiments, the method further includes: if the duration for which the lens cover blocks the lens is greater than or equal to a preset duration, controlling the power supply unit to stop supplying power to the display unit; if the duration for which the lens cover blocks the lens is less than a preset duration, controlling the power supply unit to continue supplying power to the display unit.

[0267] In some embodiments, the method further includes: in response to the lens cover blocking the lens, controlling the heat dissipation device to stop operating and controlling the audio playback device to pause playing audio; in response to the duration of the lens cover blocking the lens being less than a preset duration, and the lens cover changing from blocking the lens to the first relative position, controlling the heat dissipation device to dissipate heat and controlling the audio playback device to play audio.

[0268] In some embodiments, the method further includes: receiving an input of a preset duration; or, obtaining historical usage data of the laser projection device, and determining the preset duration based on the historical usage data.

[0269] The historical usage data includes: the length of time between when the laser projection device was turned off and when the laser projection device was turned on in the historical records.

[0270] Some embodiments of the present disclosure provide an image display method for a laser projection device, the implementation principle and technical effects of which are similar to those of the laser projection device 10 described above, and will not be repeated here.

[0271] It should be noted that the description of the steps in a specific order in the figures of some embodiments of the present disclosure does not require or imply that the steps must be performed in that specific order, or that all steps must be performed to achieve the desired results. Additional steps may be added to the figures, some steps may be omitted, multiple steps may be combined into one, or one step may be broken down into multiple steps.

[0272] Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium), which stores computer program instructions. When the computer program instructions are executed on a processor, the processor executes one or more steps of the image display method of the laser projection device as described in any of the above embodiments.

[0273] For example, the computer-readable storage media may include, but are not limited to, magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical disks (e.g., CDs (Compact Disks), DVDs (Digital Versatile Disks), etc.), smart cards, and flash memory devices (e.g., EPROMs (Erasable Programmable Read-Only Memory), cards, sticks, or key drives). The various computer-readable storage media described in this disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0274] Some embodiments of the present disclosure further provide a computer program product, which includes computer program instructions, and when the computer program instructions are executed on a computer, the computer program instructions cause the computer to execute the control method of the laser projection device as described in the above embodiments.

[0275] Some embodiments of the present disclosure further provide a computer program that, when executed on a computer, causes the computer to execute the control method for the laser projection device as described in the above embodiments.

[0276] The beneficial effects of the above-mentioned computer-readable storage medium, computer program product and computer program are the same as the beneficial effects of the control method of the laser projection device described in some of the above-mentioned embodiments, and will not be repeated here.

[0277] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0278] It should be noted that any one of the disclosed technical solutions in the present disclosure can solve one or more of the above-mentioned technical problems to a certain extent and achieve corresponding technical effects. Alternatively, multiple disclosed technical solutions can also be combined into an overall solution to solve one or more of the above-mentioned technical problems and achieve corresponding technical effects. Alternatively, some of the disclosed technical solutions are combined into an overall solution, and combined with related technologies and deterioration solutions, but the solution can compensate for the deterioration trend through the technical means of the present disclosure, thereby solving one or more of the above-mentioned technical problems to a certain extent as a whole and achieving corresponding technical effects. Alternatively, each disclosed technical solution is combined into a complete technical solution, constituting an organic and inseparable overall solution, thereby solving the technical problems as a whole and achieving corresponding technical effects.

[0279] Any technical solution disclosed in this disclosure, as well as the recombination of multiple technical solutions disclosed, can form a complete technical solution, and can solve one or more of the above-mentioned technical problems and achieve corresponding technical effects. They all belong to the content of this disclosure and are the content that is directly and unambiguously determined based on the content of this disclosure.

[0280] Those skilled in the art will understand that the scope of the present disclosure is not limited to the above specific embodiments, and that certain elements of the embodiments may be modified and replaced without departing from the spirit of the present disclosure. The scope of the present disclosure is limited by the appended claims.

Claims

1. A laser projection device, comprising: a lens configured to project an incident projection light beam into an image; lens cap; a detection device, comprising a sensing component, wherein the sensing component is configured to output a first instruction in response to whether the lens cover blocks the lens; The first instruction is configured to indicate a first relative position between the lens cover and the lens, and to indicate one of a second relative position between the lens cover and the lens; the first relative position represents that an orthographic projection of the lens cover is offset from an orthographic projection of the lens on a plane perpendicular to a light emitting direction of the lens, and the second relative position represents a position where the lens cover blocks the lens; as well as A controller is connected to the detection device, and is configured to receive the first instruction and, according to the first instruction, execute a target operation corresponding to the first instruction.

2. The laser projection device according to claim 1, wherein: The sensing component comprises: at least one first sensing portion, disposed around the lens; and at least one second sensing portion, disposed on the lens cover; Wherein, the at least one first sensing unit is configured as: In response to the second sensing portion being in contact with the first sensing portion, a target value corresponding to a feature of the second sensing portion in contact with the first sensing portion is output to the controller based on the feature of the second sensing portion in contact with the first sensing portion; the first instruction includes: the target value sent by the at least one first sensing portion; the target value sent by the at least one first sensing portion is configured to indicate a second relative position between the lens cover and the lens; In response to the second sensing portion moving away from the first sensing portion, a first instruction indicating a first relative position between the lens cover and the lens is output to the controller.

3. The laser projection device according to claim 2, wherein: The number of the at least one second sensing portion is greater than the number of the at least one first sensing portion; the laser projection device further includes a fixing member, the fixing member includes at least one fixing portion; the at least one fixing portion is arranged around the lens; The at least one second sensing portion is further configured to fit with the at least one fixing portion so that the lens cover covers the lens.

4. The laser projection device according to any one of claims 1 to 3, further comprising: a processing unit, wherein the sensing component is connected to the controller through the processing unit; The processing unit is configured to: receive the first instruction and the second instruction; sending the first instruction or the second instruction to the controller according to the execution priority of the first instruction and the second instruction, wherein the second instruction is a triggered instruction different from the first instruction; The controller is further configured to receive the first instruction or the second instruction from the processing unit.

5. The laser projection device according to claim 4, wherein: The processing unit is further configured to: when it is determined that the duration for which the indication information of the first instruction remains unchanged is greater than or equal to a preset duration, send the first instruction to the controller.

6. The laser projection device according to claim 5, wherein: The target operation corresponding to the first instruction indicating the first relative position includes: controlling the laser projection device to turn on, and controlling the laser projection device to perform projection display; The target operation corresponding to the first instruction indicating the second relative position includes: controlling the laser projection device to shut down and pause projection; the target operation also includes: when controlling the laser projection device to pause projection, controlling the laser projection device to pause playback, mute, standby, switch to target mode, or switch signal source; the target mode includes: at least one of speaker mode and dust removal mode.

7. The laser projection device according to claim 6, wherein: The controller is further configured to: when determining according to the first instruction that the target operation includes switching the signal source, and determining based on a first instruction subsequent to the first instruction that the lens cover and the lens are in the first relative position, execute the target operation of switching the signal source.

8. The laser projection device according to any one of claims 1 to 7, further comprising: a laser configured to emit a laser beam; as well as a display unit configured to modulate an incident laser beam according to an image signal to form the projection beam; The laser and the display unit are respectively connected to the controller; the controller is configured as follows: In response to the lens cover covering the lens, outputting a first image signal to the display unit and controlling the lens to stop projecting the projection light beam; as well as In response to the lens cover being changed from blocking the lens to the first relative position, a second image signal is output to the display. part, and controls the laser to emit light, so that the display part modulates the projection light beam projected onto the lens based on the second image signal to perform projection display.

9. The laser projection device according to claim 8, wherein: The laser projection device satisfies one of the following conditions: The first image signal and the second image signal are respectively image signals acquired in real time by the laser projection device, and the controller is further configured to: controlling the laser to stop emitting light to the display portion, so that the lens stops projecting the projection light beam; and The first image signal is a preset image including a black image, and the second image signal is an image signal acquired in real time by the laser projection device.

10. The laser projection device according to claim 8 or 9, wherein: The controller is further configured to: In response to the lens cover covering the lens, starting timing; If the duration of the lens cover blocking the lens is less than a preset duration and the lens cover changes from blocking the lens to the first relative position, controlling the display unit to project the projection light beam through the lens based on the second image signal; as well as If the duration of the lens cover covering the lens is greater than or equal to the preset duration and the lens cover continues to cover the lens, the device enters a standby state.

11. The laser projection device according to claim 10, further comprising: a power supply unit connected to the display unit and configured to supply power to the display unit; Wherein, the controller is further configured to: If the duration of the lens cover covering the lens is greater than or equal to the preset duration, controlling the power supply unit to stop supplying power to the display unit; and If the duration of the lens cover covering the lens is shorter than the preset duration, the power supply unit is controlled to continue supplying power to the display unit.

12. The laser projection device according to claim 10 or 11, further comprising: a heat dissipation device configured to dissipate heat from the laser projection device; as well as an audio playback device configured to play audio; Wherein, the controller is further configured to: In response to the lens cover covering the lens, controlling the heat dissipation device to stop operating and controlling the audio playback device to pause playing audio; as well as In response to the duration that the lens cover blocks the lens being less than the preset duration and the lens cover changes from blocking the lens to the first relative position, the heat dissipation device is controlled to dissipate heat and the audio playback device is controlled to play audio.

13. The laser projection device according to any one of claims 10 to 12, wherein: The controller is further configured to do at least one of the following: receiving the input of the preset duration; and Acquiring historical usage data of the laser projection device, and determining the preset duration based on the historical usage data; The historical usage data includes: the duration between turning off the laser projection device and turning on the laser projection device in the historical records.

14. The laser projection device according to any one of claims 1 to 13, wherein: The sensing component comprises: at least one first sensing portion, disposed around the lens; and At least one second sensing portion is disposed on the lens cover; the at least one second sensing portion includes a plurality of second sensing portions, and at least some of the plurality of second sensing portions have different magnetic properties.

15. The laser projection device according to any one of claims 1 to 14, further comprising: an indicator light, configured to indicate the position between the lens cover and the lens; Wherein, the controller is further configured to: control the indicator light to light up when receiving a first instruction indicating the second relative position.

16. A control method for a laser projection device, applied to the laser projection device, the laser projection device comprising: a lens configured to project an incident projection light beam into an image; lens cap; a detection device, configured to detect whether the lens cover blocks the lens; a laser configured to emit a laser beam; a display unit configured to modulate an incident laser beam according to an image signal to form the projection beam; as well as a controller connected to the detection device, the laser, and the display unit; The method comprises: In response to the lens cover covering the lens, outputting a first image signal to the display unit and controlling the lens to stop projecting the projection light beam; In response to the lens cover changing from blocking the lens to a first relative position, a second image signal is output to the display unit, and the laser is controlled to emit light, so that the display unit modulates the projection light beam projected onto the lens based on the second image signal for projection display; the first relative position represents that on a plane perpendicular to the light emitting direction of the lens, the orthographic projection of the lens cover is staggered with the orthographic projection of the lens.

17. The control method according to claim 16, wherein one of the following conditions is satisfied: The first image signal and the second image signal are respectively image signals acquired in real time by the laser projection device, and controlling the lens to stop projecting the projection light beam includes: controlling the laser to stop emitting light to the display portion, so that the lens stops projecting the projection light beam; The first image signal is a preset image, the preset image includes a black image or an image with a grayscale value close to black, the second image signal is an image signal acquired in real time by the laser projection device, and the controlling the lens to stop projecting the projection light beam includes: The display unit is controlled to display the preset image, so as to stop the lens from projecting the projection light beam through the display unit.

18. The control method according to claim 16 or 17, further comprising: In response to the lens cover covering the lens, starting timing; If the duration of the lens cover blocking the lens is less than a preset duration and the lens cover changes from blocking the lens to the first relative position, controlling the display unit to project the projection light beam through the lens based on the second image signal; as well as If the duration of the lens cover covering the lens is greater than or equal to the preset duration, and the lens cover continues to cover the lens, the controller is controlled to enter a standby state.

19. The control method according to any one of claims 16 to 18, wherein: The detection device includes a sensing component; the method further includes: Outputting a first instruction via the sensing component in response to whether the lens cover blocks the lens; the first instruction is configured to indicate one of a first relative position between the lens cover and the lens, and a second relative position between the lens cover and the lens; the second relative position represents a position where the lens cover blocks the lens; and The first instruction is received by the controller, and a target operation corresponding to the first instruction is executed according to the first instruction.

20. The control method according to claim 19, wherein: The laser projection device further includes a processing unit, and the sensing component is connected to the controller via the processing unit; the method further includes: receiving the first instruction and the second instruction; sending the first instruction or the second instruction to the controller through the processing unit according to the priority of the first instruction and the second instruction; the second instruction is a triggered instruction different from the first instruction; and The first instruction or the second instruction is received from the processing unit through the controller.

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