Audio playing method and device of projector

Abstract

The invention relates to an audio playing method and device of a projector, and the method comprises the steps: detecting the current playing state of the projector, the playing state being used for representing the currently played content of the projector, and the playing state comprising one or more of the following: pure audio playing, pure video playing, and simultaneous audio and video playing, and when it is determined that the playing state is pure audio playing, turning off an optical machine, used for projecting a video, of the projector, and controlling the projector to continue playing the current audio in a pure audio playing mode. Therefore, the electric quantity of the projector is saved, the cruising ability of the portable battery-powered projector is especially improved, the service life of the light source system is prolonged, and the user experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of projectors, and in particular to an audio playback method and device for a projector. Background Art

[0002] At present, smart projectors are generally composed of smart operating systems, optical machines, and speakers. Among them, the optical machine can receive image signals from the smart operating system and project them onto the screen, while the audio output of the projector is the speaker receiving the audio signal from the smart operating system and then outputting it to form audible sound.

[0003] In actual applications, users generally keep the projector's optical engine working while using the projector. However, the projector's optical engine is the largest power consumer, with power consumption of hundreds to kilowatts, accounting for the vast majority of power consumption. This results in a large amount of power being wasted when the user does not need the optical engine. This is especially true for portable battery-powered projectors. When powered by batteries, the battery life will be severely reduced, shortening the service life of the light source system. Summary of the invention

[0004] The present application provides an audio playback method and device for a projector to solve the technical problem in the prior art that users generally keep the projector optical machine in working state when using the projector, which leads to wasting battery power when the user does not need the optical machine.

[0005] In a first aspect, an embodiment of the present application provides an audio playback method of a projector, the method comprising:

[0006] Detecting a current playback state of the projector, where the playback state is used to characterize the content currently being played by the projector, and the playback state includes one or more of the following: pure audio playback, pure video playback, and simultaneous audio and video playback;

[0007] When it is determined that the playback state is pure audio playback, the optical machine of the projector used to project the video is turned off, and the projector is controlled to continue playing the current audio in pure audio playback mode.

[0008] As a possible implementation, the detecting the current playback state of the projector includes:

[0009] Detecting whether the projector is currently playing audio;

[0010] In the case where it is determined that the projector is currently playing audio, detecting whether the projector is currently playing video;

[0011] If it is determined that the projector is currently playing a video, determining that the current playing state of the projector is simultaneous playing of audio and video;

[0012] If it is determined that the projector is not currently playing a video, then it is determined that the current playing state of the projector is pure audio playing.

[0013] As a possible implementation, when determining that the playback state is pure audio playback, turning off the optical machine of the projector for projecting the video includes:

[0014] In the case where it is determined that the playback state is pure audio playback, monitoring whether the playback state of the projector is the pure audio playback after a preset first time period has passed;

[0015] If it is monitored that the playback state of the projector after the first time period is the pure audio playback, the optical machine of the projector for playing the video is turned off.

[0016] As a possible implementation manner, the method further includes:

[0017] If it is monitored that the playback state of the projector after the first time period is no audio playback, controlling the projector to enter a standby mode;

[0018] In case that a wake-up operation on the projector is detected, the step of detecting the current playback state of the projector is returned to be executed.

[0019] As a possible implementation, when determining that the playback state is pure audio playback, turning off the optical machine of the projector for projecting the video includes:

[0020] When it is determined that the playback state is pure audio playback, detecting whether the projector is playing audio in the background;

[0021] If it is determined that the projector is playing audio in the background, a prompt box is output through a visual interface, and the prompt box is used to prompt the user whether to turn off the light machine;

[0022] When a triggering operation of the first preset button of the prompt box is detected, the optical machine of the projector for projecting the video is turned off.

[0023] As a possible implementation manner, the method further includes:

[0024] When a triggering operation of a second preset button of the prompt box or a third preset button of the projector is detected, closing the prompt box;

[0025] When no triggering operation of the first preset button and the second preset button is detected within a preset second time period, the prompt box is closed.

[0026] As a possible implementation, when determining that the playback state is pure audio playback, turning off the optical machine of the projector for projecting the video includes:

[0027] In the case where it is determined that the playback state is pure audio playback, detecting whether a preset target trigger button in the visual interface of the projector is triggered, the target trigger button being used to indicate turning off the optical machine;

[0028] Alternatively, detecting whether a target physical button of the projector is triggered;

[0029] When it is detected that the target trigger button or the target physical key is triggered, the optical machine of the projector for projecting the video is turned off.

[0030] As a possible implementation manner, controlling the projector to continue playing the current audio in a pure audio playback mode includes:

[0031] Determining a target duration of the audio-only playback mode;

[0032] Controlling the projector to play the current audio of the target duration in a pure audio playback mode;

[0033] The method further comprises:

[0034] Determining whether the projector currently meets the exit condition of the audio-only playback mode;

[0035] When it is determined that the exit condition is currently met, the projector is controlled to exit the audio-only playback mode.

[0036] As a possible implementation manner, determining whether the projector currently meets the exit condition of the audio-only playback mode includes:

[0037] Monitoring the duration of the current audio played by the projector in the audio-only playback mode;

[0038] According to the playback duration, it is determined whether the projector currently meets the exit condition of the pure audio playback mode.

[0039] As a possible implementation, determining whether the projector currently meets the exit condition of the audio-only playback mode according to the playback duration includes:

[0040] Determining whether the playback duration reaches a preset target duration;

[0041] In the case where it is determined that the playback duration reaches the target duration, determining that the projector currently meets the exit condition of the pure audio playback mode;

[0042] If it is determined that the playback duration does not reach the target duration, detecting whether the playback state of the projector is pure audio playback;

[0043] When it is determined that the playback state of the projector is not pure audio playback, and no trigger operation of any button of the projector is received after a preset third time period, determining that the projector currently meets the exit condition of the pure audio playback mode;

[0044] After controlling the projector to exit the pure audio playback mode, the method further includes:

[0045] The projector is controlled to enter a standby mode.

[0046] As a possible implementation, determining whether the projector currently meets the exit condition of the pure audio playback mode according to the playback duration includes:

[0047] Determining whether the playback duration reaches a preset target duration;

[0048] In the case where it is determined that the playback duration has not reached the target duration, detecting whether a trigger operation of any key of the projector is received;

[0049] In the case of detecting a triggering operation of any button of the projector, determining that the projector currently meets an exit condition of the pure audio playback mode;

[0050] The controlling the projector to exit the audio-only playback mode includes:

[0051] Determine whether the triggered button is the power button;

[0052] When it is determined that the triggered button is the power button, blocking the control instruction corresponding to the power button, and controlling the projector to exit the pure audio playback mode;

[0053] When it is determined that the triggered button is not the power button, directly controlling the projector to exit the audio-only playback mode;

[0054] After controlling the projector to exit the pure audio playback mode, the method further includes:

[0055] The audio controlling the projector continues to play and the light machine is turned on.

[0056] In a second aspect, an embodiment of the present application provides an audio playback device for a projector, the device comprising:

[0057] A detection module, used to detect the current playback state of the projector, wherein the playback state is used to characterize the content currently played by the projector, and the playback state includes one or more of the following: pure audio playback, pure video playback, and simultaneous audio and video playback;

[0058] The control module is used to turn off the optical machine of the projector for projecting the video when it is determined that the playback state is pure audio playback, and control the projector to continue playing the current audio in pure audio playback mode.

[0059] As a possible implementation, the detection module is specifically used to:

[0060] Detecting whether the projector is currently playing audio;

[0061] In the case where it is determined that the projector is currently playing audio, detecting whether the projector is currently playing video;

[0062] If it is determined that the projector is currently playing a video, determining that the current playing state of the projector is simultaneous playing of audio and video;

[0063] If it is determined that the projector is not currently playing a video, then it is determined that the current playing state of the projector is pure audio playing.

[0064] As a possible implementation, the control module is specifically used to:

[0065] In the case where it is determined that the playback state is pure audio playback, monitoring whether the playback state of the projector is the pure audio playback after a preset first time period has passed;

[0066] If it is monitored that the playback state of the projector after the first time period is the pure audio playback, the optical machine of the projector for playing the video is turned off.

[0067] As a possible implementation manner, the device further includes:

[0068] A standby control module, configured to control the projector to enter a standby mode if it is detected that the playback state of the projector after the first time period is no audio playback;

[0069] The execution module is used to return to the step of detecting the current playback state of the projector when a wake-up operation on the projector is detected.

[0070] As a possible implementation, the control module is specifically used to:

[0071] When it is determined that the playback state is pure audio playback, detecting whether the projector is playing audio in the background;

[0072] If it is determined that the projector is playing audio in the background, a prompt box is output through a visual interface, and the prompt box is used to prompt the user whether to turn off the light machine;

[0073] When a triggering operation of the first preset button of the prompt box is detected, the optical machine of the projector for projecting the video is turned off.

[0074] As a possible implementation manner, the device further includes:

[0075] A first closing module, configured to close the prompt box when a triggering operation of a second preset button of the prompt box or a third preset button of the projector is detected;

[0076] The second closing module is used to close the prompt box when no triggering operation of the first preset button and the second preset button is detected within a preset second time period.

[0077] As a possible implementation, the control module is specifically used to:

[0078] In the case where it is determined that the playback state is pure audio playback, detecting whether a preset target trigger button in the visual interface of the projector is triggered, the target trigger button being used to indicate turning off the optical machine;

[0079] Alternatively, detecting whether a target physical button of the projector is triggered;

[0080] When it is detected that the target trigger button or the target physical key is triggered, the optical machine of the projector for projecting the video is turned off.

[0081] As a possible implementation, the control module is specifically used to:

[0082] Determining a target duration of the audio-only playback mode;

[0083] Controlling the projector to play the current audio of the target duration in a pure audio playback mode;

[0084] The device also includes:

[0085] A determination module, used to determine whether the projector currently meets the exit condition of the pure audio playback mode;

[0086] An exit module is used to control the projector to exit the pure audio playback mode when it is determined that the exit condition is currently met.

[0087] As a possible implementation manner, the determining module includes:

[0088] A monitoring submodule, used for monitoring the playing time of the current audio played by the projector in the pure audio playing mode;

[0089] The determination submodule is used to determine whether the projector currently meets the exit condition of the pure audio playback mode according to the playback duration.

[0090] As a possible implementation manner, the determining submodule is specifically used for:

[0091] Determining whether the playback duration reaches a preset target duration;

[0092] In the case where it is determined that the playback duration reaches the target duration, determining that the projector currently meets the exit condition of the pure audio playback mode;

[0093] If it is determined that the playback duration does not reach the target duration, detecting whether the playback state of the projector is pure audio playback;

[0094] When it is determined that the playback state of the projector is not pure audio playback, and no trigger operation of any button of the projector is received after a preset third time period, determining that the projector currently meets the exit condition of the pure audio playback mode;

[0095] The device also includes:

[0096] A standby module is used to control the projector to enter the standby mode after controlling the projector to exit the pure audio playback mode.

[0097] As a possible implementation manner, the determining submodule is specifically used to:

[0098] Determining whether the playback duration reaches a preset target duration;

[0099] In the case where it is determined that the playback duration has not reached the target duration, detecting whether a trigger operation of any key of the projector is received;

[0100] In the case of detecting a triggering operation of any button of the projector, determining that the projector currently meets an exit condition of the pure audio playback mode;

[0101] The exit module is specifically used for:

[0102] Determine whether the triggered button is the power button;

[0103] When it is determined that the triggered button is the power button, blocking the control instruction corresponding to the power button, and controlling the projector to exit the pure audio playback mode;

[0104] When it is determined that the triggered button is not the power button, directly controlling the projector to exit the audio-only playback mode;

[0105] The device also includes:

[0106] A lighting module is used to control the audio of the projector to continue playing and light up the light machine after controlling the projector to exit the pure audio playback mode.

[0107] In a third aspect, an embodiment of the present application provides an electronic device, comprising: a processor and a memory, wherein the processor is used to execute an audio playback program of a projector stored in the memory to implement the audio playback method of the projector described in any one of the first aspects.

[0108] In a fourth aspect, an embodiment of the present application provides a storage medium, wherein the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the audio playback method of the projector described in any one of the first aspects.

[0109] The technical solution provided in the embodiment of the present application detects the current playback state of the projector, which can be used to characterize the content currently played by the projector. The playback state may include one or more of the following: pure audio playback, pure video playback, and simultaneous playback of audio and video. When it is determined that the playback state is pure audio playback, the optical machine used by the projector to project the video is turned off, and the projector is controlled to continue playing the current audio in pure audio playback mode. This technical solution, by providing a pure audio playback mode, can promptly turn off the optical machine and keep the audio playing when the user does not need to project the video, thereby saving the power of the projector, especially improving the battery life of portable battery-powered projectors, increasing the service life of the light source system, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0110] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0111] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0112] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0113] Figure 1 A flowchart of an embodiment of an audio playback method of a projector provided in an embodiment of the present application;

[0114] Figure 2 A flowchart of another embodiment of an audio playback method for a projector provided in an embodiment of the present application;

[0115] Figure 3 A schematic diagram of the structure of a prompt box provided in an embodiment of the present application;

[0116] Figure 4 A flowchart of another embodiment of an audio playback method for a projector provided in an embodiment of the present application;

[0117] Figure 5 A flowchart of an embodiment of an audio playback method of a projector provided in an embodiment of the present application;

[0118] Figure 6 A block diagram of an embodiment of an audio playback device of a projector provided in an embodiment of the present application;

[0119] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0120] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0121] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0122] In order to solve the technical problem that in the prior art, when users use a projector, they generally keep the projector's optical machine in working state, which results in a large amount of power wasted when the user does not need the optical machine. In particular, for a portable battery-powered projector, the battery life is seriously reduced when powered by batteries, and the service life of the light source system is reduced, the present application provides an audio playback method and device for a projector, which can save power of the projector by providing a pure audio playback mode. When the user does not need to project a video, the optical machine can be turned off in time and the audio playback can be maintained, so as to improve the battery life of the portable battery-powered projector, increase the service life of the light source system, and enhance the user experience.

[0123] The audio playback method of the projector provided by the present application is further explained below with reference to specific embodiments in conjunction with the accompanying drawings. The embodiments do not constitute a limitation on the embodiments of the present invention.

[0124] See also Figure 1 , is a flow chart of an embodiment of an audio playback method of a projector provided in an embodiment of the present application. Figure 1 As shown, the process may include the following steps:

[0125] Step 101 : Detect the current playback state of the projector. The playback state is used to represent the content currently played by the projector. The playback state includes one or more of the following: pure audio playback, pure video playback, and simultaneous audio and video playback.

[0126] The above-mentioned projector can be a projector used for video and audio playback in real life, which can generally be composed of an intelligent operating system, an optical machine, and a speaker. The projector receives video signals from a video APP (Application) or wirelessly transmitted from a mobile phone, which are decoded and converted into a format that can be processed by the projection system through an internal circuit, and finally projected onto the screen by an optical machine. The audio output of the projector receives audio signals from an audio APP or wirelessly transmitted from a mobile phone. These signals are decoded and amplified by the internal circuit, and then output through a built-in speaker (speaker) or a connected speaker to form an audible sound.

[0127] The above-mentioned playing state refers to the content currently played by the projector, which may include but is not limited to: pure audio playback, pure video playback, audio and video playback at the same time, and no playback and other states.

[0128] It should be noted that the above-mentioned pure audio playback refers to the playback scenario where the user's actual needs are more inclined to listen to and play audio content rather than video content, such as the output of pure audio signals. Among them, when the user's demand is pure audio playback, it may involve the output of related video signals during the playback process. This situation is also considered to be pure audio playback. For example, when playing audio, a combination of audio + video content that also generates video signals reflecting audio frequency or sound amplitude (such as staves and light bars that jump with the audio) can also be a combination of audio + video content, but the video content is not mainly about expressing the storyline (such as advertising pictures or regular flashing of light spots), or the currently running app is an audio app rather than a video app. This scenario is considered to be pure audio playback.

[0129] The playback state of simultaneous audio and video playback refers to a playback scenario that is not biased towards video content or audio content based on user needs, such as playing movies, TV series, etc. In this playback scenario, the current app is a video app (such as Netflix).

[0130] In the embodiment of the present application, the execution subject of the embodiment of the present application may be a projector, and further, may be an intelligent operating system in the projector. Based on this, during the operation of the projector, the execution subject of the embodiment of the present application may detect the current playback state of the projector to determine whether there are any components of the projector that are not required to work but are still turned on during the current operation, thereby determining whether there is a waste of power in the current working state of the projector. For example, the optical machine of the projector is turned on, but there is no demand for video playback at present, which makes the power of keeping the optical machine turned on redundant and wasted power.

[0131] As an optional implementation, in order to promptly determine whether the projector is wasting electricity, the execution subject of the embodiment of the present application may detect the current playback status of the projector in real time.

[0132] As another optional implementation, in order to save system resources, the execution subject of the embodiment of the present application may periodically detect the current playback status of the projector.

[0133] In one embodiment, in order to more accurately determine the current playback status of the projector, the execution subject of the embodiment of the present application can respectively detect the audio playback status and video playback status of the projector to determine the current playback status of the projector.

[0134] Furthermore, in order to save power, the execution subject of the embodiment of the present application may determine whether the projector is currently playing pure audio. Therefore, the execution subject of the embodiment of the present application may first detect whether the projector is currently playing audio.

[0135] As an exemplary implementation, the execution subject of the embodiment of the present application can detect whether the projector is currently playing audio through the built-in system audio manager. For example, when the system audio manager detects that the audio is active, it can be determined that the projector is currently playing audio.

[0136] As another exemplary implementation, the execution subject of the embodiment of the present application may determine whether the projector is currently playing audio by determining whether the audio APP currently installed on the projector is running.

[0137] Furthermore, it is possible to determine whether the projector is playing audio by obtaining the current application process list of the projector and determining whether the above-mentioned audio APP exists in the process list.

[0138] Optionally, when it is determined that the projector is currently playing audio, in order to exclude the possibility that the audio currently played by the projector is the audio when the projector plays a video, the execution subject of the embodiment of the present application may further detect whether the projector is currently playing a video.

[0139] As an exemplary implementation, the executing entity of the embodiment of the present application can detect whether the system video layer of the projector is rendered. If it is determined that the system video layer of the projector is rendered, it can be determined that the projector is currently playing video; if it is determined that the system video layer of the projector is not rendered, it can be determined that the projector is not currently playing video.

[0140] Optionally, since the bottom layer of the system can detect by itself whether the system video layer is rendered, the detection result of whether the system video layer is rendered can be called by setting an interface. Based on this, the execution subject of the embodiment of the present application can obtain the detection result of whether the system video layer is rendered by calling a preset system interface, and determine whether the system video layer of the projector is rendered according to the obtained detection result.

[0141] Optionally, if it is determined that the system video layer of the projector is rendered, it means that the projector is currently playing a video.

[0142] Furthermore, in order to exclude the possibility that the video signal played by the projector at this time comes from an audio APP, for example, when the projector plays music through an audio APP, the audio APP will output a note signal corresponding to the currently playing music. The executing entity of the embodiment of the present application can detect the source of the video signal rendered by the system video layer of the projector. If it is determined that the source of the video signal is an audio APP, it can be determined that the projector is not playing video at this time; if it is determined that the source of the video signal is not an audio APP, it can be determined that the projector is playing video at this time.

[0143] Among them, it can be determined that the video signal played by the projector comes from the audio APP by obtaining the current application process list of the projector and determining whether there is only an audio APP in the process list, and no video APP and other video transmission interfaces exist.

[0144] On the contrary, if it is determined that the system video layer of the projector is not rendered, it means that the projector is not playing the video at this time.

[0145] As another exemplary implementation, the execution subject of the embodiment of the present application may determine whether the projector is currently playing audio by determining whether the video APP currently installed on the projector is running.

[0146] Furthermore, it is possible to determine whether the projector is playing audio by obtaining the current application process list of the projector and determining whether the above-mentioned video APP exists in the process list.

[0147] As another exemplary implementation, the executing entity of the embodiment of the present application can determine whether the projector is projecting the screen through a video transmission interface such as HDMI (High Definition Multimedia Interface) or WIFI by determining whether there is a video transmission signal on the video transmission interface of the projector.

[0148] Optionally, the execution subject of the embodiment of the present application may determine whether there is a video transmission signal on the video transmission interface of the projector through a preset signal detection device.

[0149] Optionally, if it is determined that the projector is currently playing a video, it may be determined that the current playing state of the projector is simultaneous playing of audio and video.

[0150] On the contrary, if it is determined that the projector is not currently playing a video, it can be determined that the current playing state of the projector is pure audio playing.

[0151] Step 102: When it is determined that the above-mentioned playback state is pure audio playback, turn off the optical machine of the projector used to play the video, and control the projector to continue playing the current audio in pure audio playback mode.

[0152] The above-mentioned optical machine refers to the component of the projector used to play videos. It is the part with the largest power consumption of the projector, with power consumption reaching hundreds to kilowatts, accounting for the vast majority of power consumption.

[0153] In the embodiment of the present application, since the optical engine is the largest power consumption part of the projector, and the built-in speaker power of most projectors is less than 10 watts, the power consumption is very small compared to the power consumption occupied by the optical engine. Therefore, in order to save electricity, the executor of the embodiment of the present application can focus on determining whether the optical engine causes power waste.

[0154] Based on this, the executor of the embodiment of the present application can promptly shut down the optical machine used to project the video in the projector when determining that the playback state of the projector is pure audio playback, thereby reducing the power waste caused by the optical machine to the projector.

[0155] Furthermore, in order to enable users to enjoy audio and improve user experience, the executive body of the embodiment of the present application can set a pure audio playback mode for the projector, so that when the projector is in a pure audio playback state, the projector is controlled to continue playing the current audio in the pure audio playback mode.

[0156] In one embodiment, the execution entity of the embodiment of the present application can turn off the optical machine used to project the video of the projector according to the length of time the projector is in the pure audio playback state, thereby controlling the projector to play the current audio in the pure audio playback mode, that is, realizing that the projector automatically enters the pure audio playback mode.

[0157] As an exemplary implementation, the execution subject of the embodiment of the present application can monitor whether the playback state of the projector is pure audio playback after a preset first duration, when determining that the playback state of the projector is pure audio playback, wherein the above-mentioned first duration can be a preset standby duration of the projector, which can be set by the user or by the system default, and the embodiment of the present application does not limit this. By setting the first duration, the projector can be controlled to enter the standby mode at a fixed time, and the standby mode means that the projector currently has no operating mode and the screen is in a power-off state, so as to achieve the purpose of saving the projector power.

[0158] Optionally, if it is monitored that the playback state of the projector after the first period of time is pure audio playback, it means that the user here has no need to play the video, so the optical machine of the projector used to play the video can be turned off.

[0159] On the contrary, if it is detected that the playback state of the projector after the first duration is no audio playback, it means that the projector currently has no need to play audio and video, so the projector can be controlled to enter standby mode. Afterwards, when a wake-up operation on the projector is detected, the current playback state of the projector can continue to be detected. The above-mentioned wake-up operation can be a trigger operation of any physical button of the projector, a voice wake-up operation, or a trigger operation of any point on the projector display screen, which is not limited in the embodiments of the present application.

[0160] As an exemplary implementation, the executing entity of the embodiment of the present application may extend the standby time of the projector from a first time length to a preset time length when determining that the playback state of the projector is pure audio playback. The above preset time length may be a time length set by the user that is greater than the first time length (for example, the first time length is 1 minute, and the preset time length is 2 minutes), or it may be the system default infinite time length. The embodiment of the present application does not impose any restrictions on this.

[0161] Afterwards, it can be monitored whether the playback state of the projector after the first period of time is pure audio playback. If it is monitored that the playback state of the projector after the first period of time is pure audio playback, it means that the projector has been in a pure audio playback state for the first period of time, which can indirectly indicate that the user has no need for video delivery for the time being. Therefore, the optical machine of the projector used to play the video can be turned off, and the projector can be controlled to run in pure audio mode.

[0162] Optionally, if it is monitored that the playback status of the projector is no audio playback after the first duration, it means that the projector has stopped audio playback. Therefore, the standby time of the projector can be restored from the preset time to the first time, and the projector can be directly controlled to enter the standby mode, thereby further saving power of the projector.

[0163] Afterwards, when a wake-up operation on the projector is detected, the process may return to continue executing the step of detecting the current playback state of the projector, thereby detecting in real time whether there is any power waste in the projector.

[0164] For example, see Figure 2 , which is a flow chart of an embodiment of another audio playback method for a projector provided in an embodiment of the present application. Figure 2 The process shown in the figure uses a cyclic detection method to automatically enter the pure audio playback mode of the projector, and takes the pure audio playback mode as an example of the pure music enjoyment mode. Figure 2 As shown, the process may include the following:

[0165] In an embodiment of the present application, the execution entity of the embodiment of the present application can start a background service and use a cyclic detection method (such as an interval of 10s) to continuously identify whether there is audio playback. The audio playback here refers to pure audio playback and does not include the state of simultaneous playback of video and audio.

[0166] Optionally, when the projector is detected and identified as currently playing pure audio, the system standby time can be automatically extended (a setting item is added simultaneously in the system settings, and the user can customize the duration of the pure music enjoyment mode, which is infinite by default).

[0167] At the same time, the execution entity of the embodiment of the present application can cyclically detect whether the user's inactivity time has reached the originally set standby time (that is, the first time). If so, it detects whether the current audio is still playing. If it is detected that the audio is still playing, the optical machine is turned off and the audio-only playback mode is entered. If it is detected that the audio is no longer playing, the standby time is refreshed, the default standby time is restored, and the standby state is immediately entered. When a wake-up operation on the projector is detected, the projector is controlled to exit the standby state and the cyclic detection is performed again.

[0168] In another embodiment, the execution subject of the embodiment of the present application can turn off the optical machine of the projector according to the user's selection, and control the projector to enter the music-only mode.

[0169] As an exemplary implementation, the execution subject of the embodiment of the present application can detect whether the projector is playing audio in the background when it is determined that the current playback state of the projector is pure audio playback, that is, when the user returns to the desktop, the audio is still playing in the background.

[0170] Optionally, if it is determined that the projector is playing audio in the background, a prompt box may be output through the visual interface, and the prompt box may be used to prompt the user whether to turn off the projector, for example Figure 3 For the prompt box shown, see Figure 3 , is a schematic diagram of a prompt box structure provided in an embodiment of the present application. Figure 3 As shown, the prompt box may include prompt information prompting the user whether to turn off the optical machine, and may also include a cancel button and a confirmation button that can be clicked by the user.

[0171] Based on this, the user can determine whether to turn off the optical machine according to the prompt box. If the user wants to turn off the optical machine, the user can click the confirmation button; if the user needs to use the optical machine further, the user can click the cancel button. Therefore, when the execution subject of the embodiment of the present application detects the triggering operation of the first preset button in the prompt box, the optical machine used by the projector to project the video can be turned off. Here, the first preset button is a button used to determine to turn off the projector optical machine, for example Figure 3 Confirm button in the

[0172] Optionally, when a trigger operation of the second preset button of the prompt box or the third preset button of the projector is detected, the prompt box is closed. The second preset button may be a button for canceling the shutdown of the optical machine, for example Figure 3 The third preset button can be a return button or a power off button of the projector. When the third preset button is triggered, it means that the user wants to close the prompt box.

[0173] Optionally, if no triggering operation of the first preset button and the second preset button is detected within the preset second time period, the prompt box can be closed.

[0174] For example, for Figure 3 The prompt box shown may have its focus on the confirmation button by default. If the confirmation button is clicked, the light machine can be turned off and the prompt box can be closed; if the cancel button or the return key of the projector is clicked, the prompt box can be closed directly; if there is no operation within 10 seconds, the prompt box can be closed directly.

[0175] In yet another embodiment, the execution subject of the embodiment of the present application can be manually selected by the user whether to use the projector to play audio in pure audio playback mode.

[0176] As an exemplary implementation, the execution subject of the embodiment of the present application may detect whether a preset target trigger button in the visual interface of the projector is triggered, or detect whether a target physical button of the projector is triggered, when determining that the playback state is pure audio playback. The above-mentioned target trigger button may be a button on the visual interface of the projector used to represent turning off the optical machine, such as a shortcut key, a desktop shortcut entry, a set menu option, etc. The above-mentioned target physical button may be a button on the corresponding remote control of the projector or a button on the projector body, and the user can control the projector to play audio in pure audio playback mode by clicking the physical button.

[0177] Optionally, when it is detected that the above-mentioned target trigger button or target physical key is triggered, the optical machine of the projector used to project the video can be turned off.

[0178] The technical solution provided in the embodiment of the present application detects the current playback state of the projector, which can be used to characterize the content currently played by the projector. The playback state may include one or more of the following: pure audio playback, pure video playback, and simultaneous playback of audio and video. When it is determined that the playback state is pure audio playback, the optical machine used by the projector to project the video is turned off, and the projector is controlled to continue playing the current audio in pure audio playback mode. This technical solution, by providing a pure audio playback mode, can promptly turn off the optical machine and keep the audio playing when the user does not need to project the video, thereby saving the power of the projector, especially improving the battery life of portable battery-powered projectors, increasing the service life of the light source system, and improving the user experience.

[0179] See also Figure 4 , which is a flow chart of an embodiment of another audio playback method for a projector provided in an embodiment of the present application. Figure 4 The process shown in Figure 1 Based on the process shown in FIG. 1 , the following further describes how to exit the pure audio playback mode when the projector is playing the current audio in the pure audio playback mode. Figure 4 As shown, the process may include the following steps:

[0180] Step 401: Detect the current playback status of the projector.

[0181] Step 402: When it is determined that the playback state is pure audio playback, turn off the optical machine of the projector for projecting the video.

[0182] The detailed description of step 401 and step 402 can be found in the description of step 101 and step 102, which will not be repeated here.

[0183] Step 403: Determine the target duration of the above-mentioned pure audio playback mode.

[0184] Step 404: Control the projector to play the current audio of the target duration in pure audio playback mode.

[0185] The following is a unified description of step 403 and step 404:

[0186] The above target duration refers to the playback duration of the audio-only playback mode set in advance by the user.

[0187] In an embodiment of the present application, in order to avoid the projector being in pure audio playback mode for a long time due to user errors (for example, forgetting to turn off the audio when audio playback is no longer needed), thereby wasting power, the user can set a target duration for the pure audio playback mode in advance. When the projector plays the current audio in pure audio playback mode for the target duration, it can automatically exit the pure audio playback mode.

[0188] Based on this, the execution subject of the embodiment of the present application can determine the target duration of the pure audio playback mode, and control the projector to play the current audio of the target duration in the pure audio playback mode.

[0189] Step 405, determine whether the projector currently meets the exit condition of the pure audio playback mode, if so, execute step 406; if not, end the process.

[0190] Step 406: Control the projector to exit the audio-only playback mode.

[0191] The following is a unified description of step 405 and step 406:

[0192] In an embodiment of the present application, while controlling the projector to play the current audio in the pure audio playback mode, it can be determined in real time whether the projector currently meets the exit conditions of the pure audio playback mode, and when it is determined that the above exit conditions are currently met, the projector is controlled to exit the pure audio playback mode.

[0193] In one embodiment, the execution entity of the embodiment of the present application can monitor the playback time of the current audio played by the projector in the pure audio playback mode, and determine whether the projector currently meets the above-mentioned exit conditions based on the playback time, and control the projector to exit the pure audio playback mode.

[0194] As an exemplary implementation, the executing entity of the embodiment of the present application may determine whether the playback time of the projector in the pure audio playback mode reaches a preset target time. The above target time may be a user-preset time or a system-default time, and the embodiment of the present application does not impose any restrictions on this.

[0195] Optionally, when it is determined that the playback time has reached the target time, it can be determined that the projector currently meets the exit conditions of the pure audio playback mode, and after controlling the projector to exit the pure audio playback mode, the projector is controlled to enter the standby mode. The standby mode means that the projector currently has no operating mode and the screen is in a power-off state, so as to save power of the projector.

[0196] On the contrary, when it is determined that the playback time has not reached the target time, it can be detected whether the playback status of the projector is pure audio playback. If it is determined that the playback status of the projector is not pure audio playback, for example, video and audio are played simultaneously or there is no audio playback, then it can be determined that the projector currently meets the exit conditions of the pure audio playback mode.

[0197] Furthermore, when it is determined that the playback state of the projector is not pure audio playback, a countdown can be performed on the projector. If no trigger operation of any button of the projector is received after the countdown ends, that is, no trigger operation of any button of the projector is received after the preset third time period, it means that the projector at this time has no need to play video within the preset time period. Therefore, it can be determined that the projector currently meets the exit conditions of the pure audio playback mode, and after controlling the projector to exit the pure audio playback mode, the projector is controlled to enter the standby mode. The standby mode means that the projector currently has no operation mode and the screen is in a power-off state, so as to save power of the projector.

[0198] Optionally, after receiving a signal that the power button has been clicked, the system can be awakened and the light engine can be turned on.

[0199] In another embodiment, the execution entity of the embodiment of the present application can exit the pure audio playback mode through user operation.

[0200] As an exemplary implementation, the executing entity of the embodiment of the present application can determine whether the playback time of the projector in the pure audio playback mode reaches the target time, and if it is determined that the playback time has not reached the target time, detect whether a trigger operation of any button of the projector is received.

[0201] Optionally, when a trigger operation of any button of the projector is detected, it indicates that the user needs to control the projector to work, such as playing a video. Therefore, it can be determined that the projector currently meets the exit conditions of the pure audio playback mode, and the projector can be controlled to exit the pure audio playback mode.

[0202] Furthermore, since the power button has corresponding control instructions, such as a standby instruction, that is, the user can control the projector to enter the standby state by triggering the power button, therefore, when a trigger operation of any button is received, it can be determined whether the triggered button is the power button.

[0203] Optionally, when it is determined that the triggered button is the power button, the control instruction corresponding to the power button can be blocked, and the projector can be controlled to exit the pure audio playback mode.

[0204] On the contrary, when it is determined that the triggered button is not the power button, the projector can be directly controlled to exit the audio-only playback mode.

[0205] Finally, after controlling the projector to exit the audio-only playback mode, you can control the projector's audio to continue playing and light up the light machine.

[0206] For example, see Figure 5 , which is a flow chart of an embodiment of another audio playback method for a projector provided in an embodiment of the present application. Figure 5 The process shown takes the pure audio playback mode as the pure music sharing mode, and uses an example to illustrate the interaction of the pure music sharing mode. Figure 5 As shown, the process may include the following:

[0207] In the embodiment of the present application, in the music pure enjoyment mode, the projector will keep the optical machine turned off and continue to play the audio until the audio stops, the music pure enjoyment setting time is reached, or the user performs a key operation, specifically:

[0208] First, you can continuously monitor the audio playback status. When the audio stops, the standby countdown will be refreshed and the system default standby time will be restored. After the standby countdown is up, the device system will enter the standby state from the active state. Press the power button to wake up the system and turn on the light machine.

[0209] Optionally, if the audio resumes playing during the standby countdown (for example, the audio may be paused due to network reasons and then resumes playing after the network is restored), the system standby time is extended again.

[0210] Finally, if the projector is in active state, that is, it has not entered standby due to audio stopping or reaching the set duration of music pure enjoyment mode, then clicking any button on the remote control or device (including the power button) will directly turn on the light machine and resume projection display.

[0211] Furthermore, it can be determined whether the clicked button is the power button. If it is determined that the clicked button is the power button, the power button can be intercepted and not enter standby mode, and Music Pure Enjoyment can be exited to keep the music playing and the light machine can be turned on.

[0212] The technical solution provided in the embodiment of the present application detects the current playback state of the projector, and when it is determined that the playback state is pure audio playback, turns off the optical machine used by the projector to project the video, determines the target duration of the above-mentioned pure audio playback mode, controls the projector to play the current audio of the target duration in the pure audio playback mode, determines whether the projector currently meets the exit conditions of the pure audio playback mode, and when it is determined that the above-mentioned exit conditions are currently met, controls the projector to exit the pure audio playback mode. This technical solution can determine in real time whether the projector meets the exit conditions of the pure audio playback mode during the process of controlling the projector to play in the pure audio playback mode, and when it meets the conditions, exits the pure audio playback mode in time to prevent the user from being unable to continue to use the projector for video playback, thereby saving the power of the projector, especially improving the battery life of the portable battery-powered projector, and increasing the service life of the light source system, while ensuring the user experience of the user using the projector.

[0213] See also Figure 6 , is a block diagram of an embodiment of an audio playback device for a projector provided in an embodiment of the present application. Figure 6 The device shown can be applied to a projector. Figure 6 As shown, the device may include:

[0214] A detection module 61 is used to detect the current playback state of the projector, where the playback state is used to represent the content currently played by the projector, and the playback state includes one or more of the following: pure audio playback, pure video playback, and simultaneous audio and video playback;

[0215] The control module 62 is used to turn off the optical machine of the projector for projecting the video when it is determined that the playback state is pure audio playback, and control the projector to continue playing the current audio in pure audio playback mode.

[0216] As a possible implementation, the detection module 61 is specifically configured to:

[0217] Detecting whether the projector is currently playing audio;

[0218] In the case where it is determined that the projector is currently playing audio, detecting whether the projector is currently playing video;

[0219] If it is determined that the projector is currently playing a video, determining that the current playing state of the projector is simultaneous playing of audio and video;

[0220] If it is determined that the projector is not currently playing a video, then it is determined that the current playing state of the projector is pure audio playing.

[0221] As a possible implementation, the control module 62 is specifically configured to:

[0222] In the case where it is determined that the playback state is pure audio playback, monitoring whether the playback state of the projector is the pure audio playback after a preset first time period has passed;

[0223] If it is monitored that the playback state of the projector after the first time period is the pure audio playback, the optical machine of the projector for playing the video is turned off.

[0224] As a possible implementation, the device further includes (not shown in the figure):

[0225] A standby control module, configured to control the projector to enter a standby mode if it is detected that the playback state of the projector after the first time period is no audio playback;

[0226] The execution module is used to return to the step of detecting the current playback state of the projector when a wake-up operation on the projector is detected.

[0227] As a possible implementation, the control module 62 is specifically configured to:

[0228] When it is determined that the playback state is pure audio playback, detecting whether the projector is playing audio in the background;

[0229] If it is determined that the projector is playing audio in the background, a prompt box is output through a visual interface, and the prompt box is used to prompt the user whether to turn off the light machine;

[0230] When a triggering operation of the first preset button of the prompt box is detected, the optical machine of the projector for projecting the video is turned off.

[0231] As a possible implementation, the device further includes (not shown in the figure):

[0232] A first closing module, configured to close the prompt box when a triggering operation of a second preset button of the prompt box or a third preset button of the projector is detected;

[0233] The second closing module is used to close the prompt box when no triggering operation of the first preset button and the second preset button is detected within a preset second time period.

[0234] As a possible implementation, the control module 62 is specifically configured to:

[0235] In the case where it is determined that the playback state is pure audio playback, detecting whether a preset target trigger button in the visual interface of the projector is triggered, the target trigger button being used to indicate turning off the optical machine;

[0236] Alternatively, detecting whether a target physical button of the projector is triggered;

[0237] When it is detected that the target trigger button or the target physical key is triggered, the optical machine of the projector for projecting the video is turned off.

[0238] As a possible implementation, the control module 62 is specifically configured to:

[0239] Determining a target duration of the audio-only playback mode;

[0240] Controlling the projector to play the current audio of the target duration in a pure audio playback mode;

[0241] The device also includes (not shown in the figure):

[0242] A determination module, used to determine whether the projector currently meets the exit condition of the pure audio playback mode;

[0243] An exit module is used to control the projector to exit the pure audio playback mode when it is determined that the exit condition is currently met.

[0244] As a possible implementation manner, the determining module includes:

[0245] A monitoring submodule, used for monitoring the playing time of the current audio played by the projector in the pure audio playing mode;

[0246] The determination submodule is used to determine whether the projector currently meets the exit condition of the pure audio playback mode according to the playback duration.

[0247] As a possible implementation manner, the determining submodule is specifically used for:

[0248] Determining whether the playback duration reaches a preset target duration;

[0249] In the case where it is determined that the playback duration reaches the target duration, determining that the projector currently meets the exit condition of the pure audio playback mode;

[0250] In the case where it is determined that the playback duration does not reach the target duration, detecting whether the playback state of the projector is pure audio playback;

[0251] When it is determined that the playback state of the projector is not pure audio playback, and no trigger operation of any button of the projector is received after a preset third time period, determining that the projector currently meets the exit condition of the pure audio playback mode;

[0252] The device also includes (not shown in the figure):

[0253] A standby module is used to control the projector to enter the standby mode after controlling the projector to exit the pure audio playback mode.

[0254] As a possible implementation manner, the determining submodule is specifically used to:

[0255] Determining whether the playback duration reaches a preset target duration;

[0256] In the case where it is determined that the playback duration has not reached the target duration, detecting whether a trigger operation of any key of the projector is received;

[0257] In the case of detecting a triggering operation of any button of the projector, determining that the projector currently meets an exit condition of the pure audio playback mode;

[0258] The exit module is specifically used for:

[0259] Determine whether the triggered button is the power button;

[0260] When it is determined that the triggered button is the power button, blocking the control instruction corresponding to the power button, and controlling the projector to exit the pure audio playback mode;

[0261] When it is determined that the triggered button is not the power button, directly controlling the projector to exit the audio-only playback mode;

[0262] The device also includes (not shown in the figure):

[0263] A lighting module is used to control the audio of the projector to continue playing and light up the light machine after controlling the projector to exit the pure audio playback mode.

[0264] like Figure 7 As shown, it is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application, including a processor 71, a communication interface 72, a memory 73 and a communication bus 74, wherein the processor 71, the communication interface 72, and the memory 73 communicate with each other through the communication bus 74.

[0265] A memory 73, for storing computer programs;

[0266] In one embodiment of the present application, the processor 71 is used to execute the program stored in the memory 73 to implement the audio playback method of the projector provided by any of the above method embodiments, including:

[0267] Detecting a current playback state of the projector, where the playback state is used to characterize the content currently being played by the projector, and the playback state includes one or more of the following: pure audio playback, pure video playback, and simultaneous audio and video playback;

[0268] When it is determined that the playback state is pure audio playback, the optical machine of the projector used to project the video is turned off, and the projector is controlled to continue playing the current audio in pure audio playback mode.

[0269] An embodiment of the present application further provides a storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the audio playback method of the projector provided in any of the aforementioned method embodiments are implemented.

[0270] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0271] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0272] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0273] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for playing audio of a projector, It is characterized in that The method comprises: Detecting a current playback state of the projector, where the playback state is used to characterize the content currently being played by the projector, and the playback state includes one or more of the following: pure audio playback, pure video playback, and simultaneous audio and video playback; When it is determined that the playback state is pure audio playback, the optical machine of the projector used to project the video is turned off, and the projector is controlled to continue playing the current audio in pure audio playback mode.

2. The method according to claim 1, It is characterized in that The detecting the current playback status of the projector includes: Detecting whether the projector is currently playing audio; In the case where it is determined that the projector is currently playing audio, detecting whether the projector is currently playing video; If it is determined that the projector is currently playing a video, determining that the current playing state of the projector is simultaneous playing of audio and video; If it is determined that the projector is not currently playing a video, then it is determined that the current playing state of the projector is pure audio playing.

3. The method according to claim 1, It is characterized in that When determining that the playback state is pure audio playback, turning off the optical machine of the projector for projecting the video includes: In the case where it is determined that the playback state is pure audio playback, monitoring whether the playback state of the projector is the pure audio playback after a preset first time period has passed; If it is monitored that the playback state of the projector after the first time period is the pure audio playback, the optical machine of the projector for playing the video is turned off.

4. The method according to claim 3, It is characterized in that The method further comprises: If it is monitored that the playback state of the projector after the first time period is no audio playback, controlling the projector to enter a standby mode; In case that a wake-up operation on the projector is detected, the step of detecting the current playback state of the projector is returned to be executed.

5. The method according to claim 1, It is characterized in that When determining that the playback state is pure audio playback, turning off the optical machine of the projector for projecting the video includes: When it is determined that the playback state is pure audio playback, detecting whether the projector is playing audio in the background; If it is determined that the projector is playing audio in the background, a prompt box is output through a visual interface, and the prompt box is used to prompt the user whether to turn off the light machine; When a triggering operation of the first preset button of the prompt box is detected, the optical machine of the projector for projecting the video is turned off.

6. The method according to claim 5, It is characterized in that The method further comprises: When a triggering operation of a second preset button of the prompt box or a third preset button of the projector is detected, closing the prompt box; When no triggering operation of the first preset button and the second preset button is detected within a preset second time period, the prompt box is closed.

7. The method according to claim 1, It is characterized in that When determining that the playback state is pure audio playback, turning off the optical machine of the projector for projecting the video includes: In the case where it is determined that the playback state is pure audio playback, detecting whether a preset target trigger button in the visual interface of the projector is triggered, the target trigger button being used to indicate turning off the optical machine; Alternatively, detecting whether a target physical button of the projector is triggered; When it is detected that the target trigger button or the target physical key is triggered, the optical machine of the projector for projecting the video is turned off.

8. The method according to claim 1, It is characterized in that The controlling the projector to continue playing the current audio in the audio-only playback mode includes: Determining a target duration of the audio-only playback mode; Controlling the projector to play the current audio of the target duration in a pure audio playback mode; The method further comprises: Determining whether the projector currently meets the exit condition of the audio-only playback mode; When it is determined that the exit condition is currently met, the projector is controlled to exit the audio-only playback mode.

9. The method according to claim 8, It is characterized in that The determining whether the projector currently satisfies the exit condition of the audio-only playback mode includes: Monitoring the duration of the current audio played by the projector in the audio-only playback mode; According to the playback duration, it is determined whether the projector currently meets the exit condition of the pure audio playback mode.

10. The method according to claim 9, It is characterized in that The determining, according to the playback duration, whether the projector currently meets the exit condition of the pure audio playback mode includes: Determining whether the playback duration reaches a preset target duration; In the case where it is determined that the playback duration reaches the target duration, determining that the projector currently meets the exit condition of the pure audio playback mode; In the case where it is determined that the playback duration does not reach the target duration, detecting whether the playback state of the projector is pure audio playback; When it is determined that the playback state of the projector is not pure audio playback, and no trigger operation of any button of the projector is received after a preset third time period, determining that the projector currently meets the exit condition of the pure audio playback mode; After controlling the projector to exit the pure audio playback mode, the method further includes: The projector is controlled to enter a standby mode.

11. The method according to claim 9, It is characterized in that The determining, according to the playback duration, whether the projector currently meets the exit condition of the pure audio playback mode includes: Determining whether the playback duration reaches a preset target duration; In the case where it is determined that the playback duration has not reached the target duration, detecting whether a trigger operation of any key of the projector is received; In the case of detecting a triggering operation of any button of the projector, determining that the projector currently meets an exit condition of the pure audio playback mode; The controlling the projector to exit the audio-only playback mode includes: Determine whether the triggered button is the power button; When it is determined that the triggered button is the power button, blocking the control instruction corresponding to the power button, and controlling the projector to exit the pure audio playback mode; When it is determined that the triggered button is not the power button, directly controlling the projector to exit the audio-only playback mode; After controlling the projector to exit the pure audio playback mode, the method further includes: The audio controlling the projector continues to play and the light machine is turned on.

12. An audio playback device for a projector, It is characterized in that The device comprises: A detection module, used to detect the current playback state of the projector, wherein the playback state is used to characterize the content currently played by the projector, and the playback state includes one or more of the following: pure audio playback, pure video playback, and simultaneous audio and video playback; The control module is used to turn off the optical machine of the projector for projecting the video when it is determined that the playback state is pure audio playback, and control the projector to continue playing the current audio in pure audio playback mode.

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