WO2017185562A1 - 投影对焦的方法及装置 - Google Patents

投影对焦的方法及装置 Download PDF

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Publication number
WO2017185562A1
WO2017185562A1 PCT/CN2016/094694 CN2016094694W WO2017185562A1 WO 2017185562 A1 WO2017185562 A1 WO 2017185562A1 CN 2016094694 W CN2016094694 W CN 2016094694W WO 2017185562 A1 WO2017185562 A1 WO 2017185562A1
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Prior art keywords
projection device
distance
projection
sharpness
projected image
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PCT/CN2016/094694
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English (en)
French (fr)
Inventor
刘学政
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中兴通讯股份有限公司
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Publication of WO2017185562A1 publication Critical patent/WO2017185562A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/317—Convergence or focusing systems

Definitions

  • This document relates to, but is not limited to, the field of projection, and relates to a method and apparatus for projecting focus.
  • the smart pico projector is used inside, autofocus has already been used, and the camera is used to assist the focus.
  • the principle is mainly that the focus motor pushes forward from the starting position, each push (may be one step, or maybe Multi-step), the camera captures a frame of image, and then compares with the image acquired last time. If it becomes clear, the motor pushes forward again, then collects one frame of image, and then compares with the previous frame image until it finds the collected image. When the image is blurred than the previous frame, it becomes a small step and pushes backward to find the position of the clear image, which is the focus position.
  • the focus motor If the focus motor is not in the home position when the projector is in use, the focus motor first returns to the home position, then pushes forward from the home position, and the image is captured by the camera to focus.
  • This type of autofocus requires collecting information from the starting position, and requires the motor to push once, collect one frame of image, then compare it with the previous frame, and then push forward one step, which takes a long time.
  • a disadvantage in the related art is that the camera has a long focusing time.
  • the focus of the camera requires the focus motor to push forward from the starting position, and the motor needs to be pushed once, and one frame of image is acquired, and then compared with the previous frame, and then pushed forward one step.
  • the focus motor if the focus motor is not in the home position when the projection is started, the focus motor first returns to the home position, and then pushes forward from the home position, and the image is captured by the camera to focus. Overall, the focus time used is longer.
  • Embodiments of the present invention provide a method and apparatus for projecting focus, which at least solves the problem that the focusing time of the projection device is too long in the related art.
  • Embodiments of the present invention provide a method for projecting focus, including: acquiring a first distance from a projection device to a projection surface;
  • the movement parameter includes a moving step number and a moving direction
  • Pushing the projection device to the specified location according to the movement parameter includes:
  • pushing the projection device to the specified location according to the moving parameter includes:
  • the projecting device When the clarity of the second projected image is higher than the sharpness of the first projected image, the projecting device is continued to be pushed in the first direction until the third level corresponding to the previous movement is found Position, determining that the third position is the position with the highest definition.
  • the method further includes: when the clarity of the second projected image is lower than the sharpness of the first projected image, pushing the projection device in a direction opposite to the first direction, Until the resolution is found to be lower than the fourth position corresponding to the previous movement, it is determined that the fourth position is the position with the highest definition.
  • the first distance of the projection device to the projection surface is obtained by at least one of the following: infrared ranging, laser ranging, and ultrasonic ranging.
  • the method further includes: determining, according to a correspondence between the first distance and a movement parameter of the projection device, and a correspondence between a preset distance and a movement parameter of the projection device; Before the moving parameter of the projection device is pushed, determining whether the corresponding relationship includes a movement parameter corresponding to the first distance;
  • the prompt information is sent, wherein the prompt information is used to prompt the manual adjustment of the position of the projection device.
  • the embodiment of the invention further provides a device for projecting focus, comprising:
  • Obtaining a module configured to obtain a first distance from the projection device to the projection surface
  • a determining module configured to determine a movement parameter of the projection device corresponding to the first distance according to a correspondence between the preset distance and a movement parameter of the projection device, and determine the movement parameter of the projection device corresponding to the first distance Driving the movement parameters of the projection device;
  • a pushing module configured to push the projection device to a specified position according to the movement parameter, and determine the designated position as an in-focus position of the projection device.
  • the movement parameter includes a moving step number and a moving direction
  • the push module includes:
  • a searching unit configured to: in the preset table, obtain a specified number of steps and a specified direction corresponding to the first distance;
  • a first pushing unit configured to push the projection device to move the specified number of steps according to the specified direction.
  • the pushing module includes:
  • a collecting unit configured to acquire a first projected image projected by the projection device to the projection surface at a first position, wherein the first position is a position after the projection device moves a specified number of steps according to a specified direction;
  • a second pushing unit configured to push the projection device from the first position to the second position in the first direction
  • a first aligning unit configured to compare the sharpness of the second projected image acquired by the projection device at the second position and the first projected image
  • a first determining unit configured to continue to push the projection device in the first direction until the clarity of the current position is clear when the clarity of the second projected image is higher than the sharpness of the first projected image
  • the third position corresponding to the previous position is determined as the position with the highest definition.
  • the pushing module further includes:
  • a second determining unit configured to push the projection device in a direction opposite to the first direction when the sharpness of the second projected image is lower than the sharpness of the first projected image until the current
  • the fourth position corresponding to the previous position is determined as the position with the highest sharpness.
  • Embodiments of the present invention also provide a computer readable storage medium having stored therein computer executable instructions that implement a method of projecting focus when the computer executable instructions are executed.
  • FIG. 1 is a block diagram showing the hardware structure of a mobile terminal for a method of projecting a focus according to a first embodiment of the present invention
  • FIG. 2 is a flow chart of a method of projecting focus according to a first embodiment of the present invention
  • FIG. 3 is a block diagram showing the structure of an apparatus for projecting a focus according to a second embodiment of the present invention.
  • FIG. 4 is a block diagram showing an optional structure of an apparatus for projecting a focus according to a second embodiment of the present invention
  • FIG. 5 is a block diagram of another optional structure of an apparatus for projecting a focus according to a second embodiment of the present invention.
  • FIG. 6 is a flow chart of a method of projecting focus according to a third embodiment of the present invention.
  • FIG. 1 is a hardware structural block diagram of a mobile terminal for a method of projecting a focus according to an embodiment of the present invention.
  • mobile terminal 10 may include one or more (only one shown) processor 102 (processor 102 may include, but is not limited to, a Microcontroller Unit (MCU) or a programmable logic device ( A processing device such as an FPGA (Field-Programmable Gate Array), a memory 104 for storing data, and a transmission device 106 for a communication function.
  • MCU Microcontroller Unit
  • FPGA Field-Programmable Gate Array
  • the structure shown in FIG. 1 is merely illustrative and does not limit the structure of the above electronic device.
  • the mobile terminal 10 may also include more or fewer components than those shown in FIG. 1, or have a different configuration than that shown in FIG.
  • the memory 104 can be used to store software programs and modules of application software, such as program instructions/modules corresponding to the method of projecting focus in the embodiment of the present invention, and the processor 102 executes each by executing a software program and a module stored in the memory 104.
  • a functional application and data processing, that is, the above method is implemented.
  • Memory 104 may include high speed random access memory, and may also include non-volatile memory such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory.
  • memory 104 can further include storage remotely set relative to processor 102 These remote memories can be connected to the mobile terminal 10 through a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.
  • Transmission device 106 is for receiving or transmitting data via a network.
  • the above-described network specific example may include a wireless network provided by a communication provider of the mobile terminal 10.
  • the transmission device 106 includes a Network Interface Controller (NIC) that can be connected to other network devices through a base station to communicate with the Internet.
  • the transmission device 106 can be a Radio Frequency (RF) module for communicating with the Internet wirelessly.
  • NIC Network Interface Controller
  • RF Radio Frequency
  • FIG. 2 is a flowchart of a method for projecting focus according to an embodiment of the present invention. As shown in FIG. 2, the flow includes the following steps:
  • Step S202 acquiring a first distance from the projection device to the projection surface
  • Step S204 determining a movement parameter of the projection device corresponding to the first distance according to a correspondence between the preset distance and a movement parameter of the projection device, and determining, according to the movement parameter of the projection device corresponding to the first distance, Movement parameters of the projection device;
  • Step S206 pushing the projection device to the designated position according to the determined movement parameter for pushing the projection device, and determining the designated position as the focus position of the projection device.
  • the execution body of the above steps may be a projection device, a control system of the projection device, or the like, but is not limited thereto.
  • the moving parameter includes a moving step number and a moving direction
  • pushing the projection device to the specified position according to the moving parameter includes:
  • Step S11 searching for a specified number of steps and a specified party corresponding to the first distance in the preset table. to;
  • step S12 the projection device moves the specified number of steps according to the specified direction.
  • the movement parameters of the projection device include the number of moving steps and the moving direction.
  • the determined movement parameters of the push projection device also include the number of moving steps and the direction of movement.
  • pushing the projection device to the specified location according to the moving parameter includes:
  • Step S21 the first projection image projected by the projection device to the projection surface at the first position, wherein the first position is a position after the projection device moves the specified number of steps according to the specified direction; optionally, the first position is a coarse adjustment.
  • Step S22 moving the projection device from the first position to the second position from the first position in the first direction; optionally, the first predetermined number of steps may be a unit step number.
  • the first direction may be a direction of the projection device facing the projection surface, or a direction opposite thereto.
  • Step S23 comparing the sharpness of the second projected image and the first projected image acquired by the projection device at the second position
  • Step S24 when the resolution of the second projected image is higher than the sharpness of the first projected image, continue to push the projection device in the first direction until the sharpness of the current position is lower than the sharpness of the previous position,
  • the third position corresponding to the previous position is determined to be the position with the highest definition. That is, the projection picture is gradually collected in the first direction, and the projection picture is compared frame by frame until the projection picture with the highest definition is found, and the position of the projection device at this time is taken as the position of the projection focus.
  • the method further includes: when the resolution of the second projected image is lower than the sharpness of the first projected image, in step S31, pushing the projection device in a direction opposite to the first direction until the current position
  • the fourth position corresponding to the previous position is determined as the position with the highest sharpness.
  • the embodiment may be, but is not limited to, acquiring a first distance from the projection device to the projection surface by the following methods: infrared ranging, laser ranging, and ultrasonic ranging.
  • the method of this embodiment further includes: according to a correspondence between the first distance and a movement parameter of the mobile projection device, and a correspondence between the preset distance and a movement parameter of the mobile projection device, Before determining the movement parameter for pushing the projection device, step S41, determining whether the movement parameter corresponding to the first distance is included in the correspondence relationship;
  • step S42 when the determination result is no, the prompt information is sent, wherein the prompt information is used to prompt the manual adjustment of the position of the projection device.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present application which is essential or contributes to the related art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, CD-ROM).
  • the instructions include a number of instructions for causing a terminal device (which may be a cell phone, computer, server, or network device, etc.) to perform the methods of various embodiments of the present invention.
  • a device for projecting a focus is provided, which is used to implement the above-mentioned embodiments and optional embodiments, and details have been omitted for description.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • FIG. 3 is a structural block diagram of an apparatus for projecting a focus according to an embodiment of the present invention. As shown in FIG. 3, the apparatus includes:
  • the obtaining module 30 is configured to acquire a first distance from the projection device to the projection surface
  • the determining module 32 is configured to determine a movement parameter of the projection device corresponding to the first distance according to a correspondence between the preset distance and a movement parameter of the projection device, and determine, according to the movement parameter of the projection device corresponding to the first distance a movement parameter for pushing the projection device;
  • Push module 34 configured to push the projection device to a specified position according to the movement parameter, and to specify The position is determined as the focus position of the projection device.
  • FIG. 4 is a block diagram showing an optional structure of an apparatus for projecting a focus according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes, in addition to all the modules shown in FIG.
  • the searching unit 40 is configured to: in the preset table, obtain a specified number of steps and a specified direction corresponding to the first distance;
  • the first pushing unit 42 is arranged to push the projection device to move the specified number of steps in a specified direction.
  • FIG. 5 is another block diagram of another optional structure of the apparatus for projecting focus according to an embodiment of the present invention. As shown in FIG. 5, based on the apparatus for projecting focus shown in FIG. 3 or FIG. 4, the pushing module 34 includes:
  • the collecting unit 50 is configured to collect a first projection image projected by the projection device to the projection surface at the first position, wherein the first position may be a position after the projection device moves the specified number of steps in the specified direction;
  • a second pushing unit 52 configured to push the projection device from the first position in the first direction to the second predetermined position
  • the first comparison unit 54 is configured to compare the sharpness of the second projected image and the first projected image acquired by the projection device at the second position;
  • the first determining unit 56 is configured to continue to push the projection device in the first direction when the sharpness of the second projected image is higher than the sharpness of the first projected image until the sharpness at the current position is lower than the previous position In the case of sharpness, the third position corresponding to the previous position is determined as the position with the highest definition.
  • the pushing module 34 further includes: a second determining unit 58 configured to push the projection in a direction opposite to the first direction when the sharpness of the second projected image is lower than the sharpness of the first projected image
  • the device determines the fourth position corresponding to the previous position as the position with the highest definition until the sharpness of the current position is lower than the sharpness of the previous position.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination.
  • the forms are located in different processors.
  • This embodiment combines the use of the ranging module and the camera to focus to achieve the purpose of fast focusing.
  • the corresponding table of the number of steps is pushed from the starting position. That is, when the distance measuring device measures the distance between the projector and the projection screen (or the wall surface), according to the look-up table method, the motor quickly pushes the corresponding number of steps to reach the in-focus position.
  • the produced optical machine cannot be completely consistent.
  • the distance measuring module and the camera module are added;
  • the projection module and the ranging module it is necessary to test the corresponding parameters before use, and obtain the correspondence between the projection distance and the number of motor steps when the focus is completed, and also consider the consistency of the motor advance steps. Question, complete the establishment of the form and determine the correspondence.
  • Projection equipment has the best projection distance and projection range. For example, the optimal projection distance of the projection is 50cm-5m. Outside this range, the focus can not be cleared. Within the optimal projection range, the test is performed with a suitable minimum unit distance for a propulsion test, such as 1 mm, a table is created and stored in the projector's system for use.
  • Table 1 is a first correspondence table of the projection distance and the number of lens motor advance steps, and is recorded as Table 1. Since this table cannot cover all the distance values, and each projection module has a difference, the ranging focus is used as a preliminary operation of the projection focus;
  • Serial number Projection distance Lens motor advancement steps 1 a (optimum projection distance minimum) N1 2 A+1mm N2 3 a+2mm N3 4 a+3mm N4 5 a+4mm N5
  • the distance measuring device measures the distance projected onto the screen (or the wall surface), according to the query in Table 1,
  • the following situations are as follows: 1) If the measurement distance is less than the minimum projection distance or greater than the maximum projection distance, the user is prompted to re-place the projection to the appropriate position; 2) the measurement distance is consistent with the distance measured in Table 1, for example, the measurement distance is a+ 4mm, quickly propelled to the corresponding position N5 by the motor, the system records the number of steps N5 has been advanced; 3) the measurement distance does not match the distance measured in Table 1, for example, the measurement distance x is between a+4mm and a+5mm Then, based on the distance of a+4mm, it is quickly pushed to the corresponding position N5 by the motor, and the system advances the number of steps N5 that has been advanced.
  • the camera After the projection is turned on, based on the operation in Case 3), the camera is opened to capture the image. Each step is taken, the camera captures one frame of image, and then compares with the image acquired last time. If it becomes clear, the motor pushes forward one step further. , then collect one frame of image, and then compare with the previous frame image until the acquired image is blurred than the previous frame, then the position of the previous frame is the focus position, and the focus is quickly completed, and based on Table 1. Record the number of steps M to advance;
  • a more accurate table 2 can be created, which is a second correspondence table of the projection distance and the number of lens motor advance steps. In use, if the x distance appears again, then the camera will not be fine-tuned, and N5+M will be pushed directly to reach the focus position faster. The exact location not found in Table 2 is followed by the previous steps;
  • the lens position remains at the projection position.
  • the distance measuring device detects a change in the distance from the screen (or wall), refocusing, the lens does not have to be retracted to the initial position.
  • Position through Table 1 and Table 2, find out the direction and number of steps that the motor needs to push, and record the number of steps to advance (starting from the initial position);
  • the distance measuring device can also be used as a trigger condition for focusing.
  • the focus triggering condition can be replaced by the acceleration sensor.
  • the acceleration sensor reports the data and reaches the threshold for triggering the focus. If the operation result of the distance measuring device is used as the trigger condition of the focus, the focus is triggered when the distance is changed and does not change within the set time.
  • FIG. 6 is a flow chart of projection focus according to a third embodiment of the present invention. As shown in FIG. 6, the method includes:
  • Step S601 Find a correspondence between the projection distance and the number of motor push steps when the focus is completed, and complete the establishment of the table;
  • a detailed test is carried out to find out the correspondence between the projection distance and the number of motor push steps when the focus is completed, and at the same time, the consistency of the motor advance steps is considered, and the table is established.
  • Step S602 When the projection position is fixed, after the first power-on (the lens is at the initial position), the distance measuring device measures the distance projected onto the screen (or the wall surface), and according to the table look-up method, quickly advances to the corresponding position by the motor, and the system records The number of steps that have been advanced; (if the measurement distance exceeds the range supported by the projection module, if the corresponding distance is not found by the look-up table method, the user is prompted to adjust the distance);
  • Step S603 After the projection is turned on, the camera collects the contrast image, the lens is pushed in a small range of the motor, the focus is quickly completed, and the number of advance steps is recorded;
  • Step S604 Table 2 is intelligently established by further correction of Table 1 and the camera. Through the query in Table 2, the focus position is reached faster. If there is no precise position in Table 2, follow the previous steps;
  • Step S605 After the system is turned off, the lens position does not move, and the system is started again. If the distance measuring device detects that the distance from the screen (or the wall surface) changes, the focus is refocused, and the lens does not need to be retracted to the initial position, and the lens is directly used. Look up the table and refer to the number of steps recorded last time to calculate the direction to be pushed And position, and record the number of steps to advance (starting from the initial position).
  • the embodiment of the invention further provides a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • a mobile hard disk e.g., a hard disk
  • magnetic memory e.g., a hard disk
  • the processor performs to acquire a first distance from the projection device to the projection surface according to the stored program code in the storage medium;
  • the processor performs a correspondence between the first distance and the preset distance and the movement parameter of the projection device according to the stored program code in the storage medium, and determines, for driving the projection device.
  • the processor performs to push the projection device to the designated position according to the movement parameter according to the stored program code in the storage medium, and determines the designated position as the focus position of the projection device.
  • modules or steps of the present application can be implemented by a general computing device, which can be concentrated on a single computing device or distributed in a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device for execution by the computing device and, in some cases, may be performed in a different order than herein.
  • the steps shown or described, or They are fabricated separately into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module.
  • the application is not limited to any particular combination of hardware and software.
  • each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function.
  • This application is not limited to any specific combination of hardware and software.

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  • Automatic Focus Adjustment (AREA)
  • Studio Devices (AREA)

Abstract

一种投影对焦的方法及装置，其方法包括：获取投影设备到投影面的第一距离；根据第一距离与投影设备的移动参数之间的对应关系，以及预设的距离与投影设备的移动参数之间的对应关系，确定用于推动投影设备的移动参数；根据移动参数推动投影设备至指定位置，并将指定位置确定为投影设备的对焦位置。通过本发明实施例的技术方案，解决了相关技术中投影设备的对焦时间过长的问题，达到快速自动对焦的效果。

Description

投影对焦的方法及装置 技术领域
本文涉及但不限于投影领域，涉及一种投影对焦的方法及装置。
背景技术
在传统的投影仪里面(一般是挂在天花板)，用的是手动调焦，通过遥控器操作，寻找到最清晰的画面，有的时候遥控器找不见了还得找桌凳站上去直接在机器上操作，非常麻烦。
相关技术中，智能微型投影仪投里面，自动对焦已经开始使用了，使用的是摄像头辅助对焦，原理主要是对焦马达从起始位置开始向前推，每推一次(可能是一步，也可能是多步)，摄像头采集一帧图像，然后和上一次采集的图像比较，如果变清晰，则马达再向前推一次，再采集一帧图像，再与前一帧图像进行对比，直到发现采集的图像比前一帧变模糊了，则变成小步往后推，从而找到清晰图像的位置，即为对焦位置。如果投影仪在开始使用的时候对焦马达没有在起始位置，则对焦马达首先返回起始位置，再从起始位置向前推，通过摄像头采集图像，进行对焦。这种自动对焦方式都是需要从起始位置开始采集信息，而且需要马达推一次，采集一帧图像，然后和前一帧对比，再向前推一步，花费时间比较长。
相关技术中的缺点是摄像头对焦时间长，摄像头对焦需要对焦马达从起始位置开始向前推，而且需要马达推一次，采集一帧图像，然后和前一帧对比，再向前推一步。而且，如果投影在开始使用的时候对焦马达没有在起始位置，则对焦马达首先返回起始位置，再从起始位置向前推，通过摄像头采集图像，进行对焦。总体来说，所用的对焦时间较长。
针对相关技术中存在的上述问题，目前尚未发现有效的解决方案。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本发明实施例提供了一种投影对焦的方法及装置，至少解决了相关技术中投影设备的对焦时间过长的问题。
本发明实施例提供了一种投影对焦的方法，包括：获取投影设备到投影面的第一距离；
根据预设的距离与投影设备的移动参数之间的对应关系确定所述第一距离对应的投影设备的移动参数，根据所述第一距离对应的投影设备的移动参数确定用于推动所述投影设备的移动参数；
根据所述移动参数推动所述投影设备至指定位置，并将所述指定位置确定为所述投影设备的对焦位置。
可选地，所述移动参数包括移动步数和移动方向；
根据所述移动参数推动所述投影设备至指定位置包括：
在预设表格中查找得到与所述第一距离对应的指定步数和指定方向；
按照所述指定方向推动所述投影设备运动所述指定步数。
可选地，根据所述移动参数推动所述投影设备至指定位置包括：
采集所述投影设备在第一位置投影到所述投影面的第一投影图像，其中，所述第一位置为所述投影设备按照指定方向运动指定步数后的位置；
将所述投影设备在第一方向上从第一位置移动第一预定步数到达第二位置；
比对所述投影设备在所述第二位置获取的第二投影图像和所述第一投影图像的清晰度；
在所述第二投影图像的清晰度高于所述第一投影图像的清晰度时，在所述第一方向上继续推动所述投影设备，直到找到清晰度低于前一次移动对应的第三位置，确定所述第三位置为清晰度最高的位置。
可选地，所述方法还包括：在所述第二投影图像的清晰度低于所述第一投影图像的清晰度时，在与所述第一方向相反的方向上推动所述投影设备，直到找到清晰度低于前一次移动对应的第四位置，确定所述第四位置为清晰度最高的位置。
可选地，通过以下方式至少之一获取投影设备到投影面的第一距离：红外测距、激光测距、超声波测距。
可选地，所述方法还包括：根据第一距离与移动所述投影设备的移动参数之间的对应关系，以及预设的距离与移动所述投影设备的移动参数之间的对应关系确定用于推动所述投影设备的移动参数之前，所判断所述对应关系中是否包括与所述第一距离对应的移动参数；
在判断结果为否时，发出提示信息，其中，所述提示信息用于提示手动调整所述投影设备的位置。
本发明实施例还提供一种投影对焦的装置，包括：
获取模块，设置为获取投影设备到投影面的第一距离；
确定模块，设置为根据预设的距离与投影设备的移动参数之间的对应关系确定所述第一距离对应的投影设备的移动参数，根据所述第一距离对应的投影设备的移动参数确定用于推动所述投影设备的移动参数；
推动模块，设置为根据所述移动参数推动所述投影设备至指定位置，并将所述指定位置确定为所述投影设备的对焦位置。
可选地，所述移动参数包括移动步数和移动方向；
推动模块包括：
查找单元，设置为在预设表格中查找得到与所述第一距离对应的指定步数和指定方向；
第一推动单元，设置为按照所述指定方向推动所述投影设备运动所述指定步数。
可选地，所述推动模块包括：
采集单元，设置为采集所述投影设备在第一位置投影到所述投影面的第一投影图像，其中，所述第一位置为所述投影设备按照指定方向运动指定步数后的位置；
第二推动单元，设置为将所述投影设备在第一方向上从第一位置推动第一预定步数到达第二位置；
第一比对单元，设置为比对所述投影设备在所述第二位置获取的第二投影图像和所述第一投影图像的清晰度；
第一确定单元，设置为在所述第二投影图像的清晰度高于所述第一投影图像的清晰度时，在所述第一方向上继续推动所述投影设备，直到在当前位置的清晰度低于前一次位置的清晰度时，将前一次位置对应的第三位置确定为清晰度最高的位置。
可选地，所述推动模块还包括：
第二确定单元，设置为在所述第二投影图像的清晰度低于所述第一投影图像的清晰度时，在与所述第一方向相反的方向上推动所述投影设备，直到在当前位置的清晰度低于前一次位置的清晰度时，将前一次位置对应的第四位置确定为清晰度最高的位置。
通过本发明实施例，获取投影设备到投影面的第一距离，然后根据第一距离与移动所述投影设备的移动参数之间的对应关系，以及预设的距离与移动所述投影设备的移动参数之间的对应关系，确定用于推动所述投影设备的移动参数，最后根据所述移动参数推动所述投影设备，并对所述投影设备进行对焦，根据投影设备当前位置与投影设备完成对焦所需要移动的距离的对应关系，可以实现投影设备的快速精准的自动对焦，因此可以解决相关技术中投影设备的对焦时间过长的问题，达到快速自动对焦的效果。本发明实施例还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机可执行指令，所述计算机可执行指令被执行时实现投影对焦的方法。
在阅读并理解了附图和详细描述后，可以明白其它方面。
附图说明
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，本申请示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1是本发明实施例一的投影对焦的方法的移动终端的硬件结构框图；
图2是根据本发明实施例一的投影对焦的方法的流程图；
图3是根据本发明实施例二的投影对焦的装置的结构框图；
图4是根据本发明实施例二的投影对焦的装置的可选结构框图；
图5是根据本发明实施例二的投影对焦的装置的另一可选结构框图；
图6是根据本发明实施例三的投影对焦的方法的流程图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本申请。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
实施例一
本申请实施例一所提供的投影对焦的方法可以在移动终端、计算机终端或者类似的运算装置中执行。以运行在移动终端上为例，图1是本发明实施例的一种投影对焦的方法的移动终端的硬件结构框图。如图1所示，移动终端10可以包括一个或多个(图中仅示出一个)处理器102(处理器102可以包括但不限于微处理器(MCU，Microcontroller Unit)或可编程逻辑器件(FPGA，Field－Programmable Gate Array)等的处理装置)、用于存储数据的存储器104、以及用于通信功能的传输装置106。本领域普通技术人员可以理解，图1所示的结构仅为示意，其并不对上述电子装置的结构造成限定。例如，移动终端10还可包括比图1中所示更多或者更少的组件，或者具有与图1所示不同的配置。
存储器104可用于存储应用软件的软件程序以及模块，如本发明实施例中的投影对焦的方法对应的程序指令/模块，处理器102通过运行存储在存储器104内的软件程序以及模块，从而执行各种功能应用以及数据处理，即实现上述的方法。存储器104可包括高速随机存储器，还可包括非易失性存储器，如一个或者多个磁性存储装置、闪存、或者其他非易失性固态存储器。在一些实例中，存储器104可进一步包括相对于处理器102远程设置的存储 器，这些远程存储器可以通过网络连接至移动终端10。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
传输装置106用于经由一个网络接收或者发送数据。上述的网络具体实例可包括移动终端10的通信供应商提供的无线网络。在一个实例中，传输装置106包括一个网络适配器(Network Interface Controller，NIC)，其可通过基站与其他网络设备相连从而可与互联网进行通讯。在一个实例中，传输装置106可以为射频(Radio Frequency，RF)模块，其用于通过无线方式与互联网进行通讯。
在本实施例中提供了一种运行于移动终端的投影对焦的方法，图2是根据本发明实施例的投影对焦的方法的流程图，如图2所示，该流程包括如下步骤：
步骤S202，获取投影设备到投影面的第一距离；
步骤S204，根据预设的距离与投影设备的移动参数之间的对应关系确定所述第一距离对应的投影设备的移动参数，根据所述第一距离对应的投影设备的移动参数确定用于推动所述投影设备的移动参数；
步骤S206，根据所述确定的用于推动投影设备的移动参数推动投影设备至指定位置，并将指定位置确定为投影设备的对焦位置。
通过上述步骤，获取投影设备到投影面的第一距离，然后根据第一距离与移动投影设备的移动参数之间的对应关系，确定用于推动投影设备的移动参数，最后根据移动参数推动投影设备，并对投影设备进行对焦，根据投影设备当前位置与投影设备完成对焦所需要移动的距离的对应关系，可以实现投影设备的快速精准的自动对焦，因此可以解决相关技术中投影设备的对焦时间过长的问题，达到快速自动对焦的效果。
可选地，上述步骤的执行主体可以为投影设备，投影设备的控制***等，但不限于此。
在根据本实施例的可选实施方式中，移动参数包括移动步数和移动方向，根据移动参数推动投影设备至指定位置包括：
步骤S11，在预设表格中查找得到与第一距离对应的指定步数和指定方 向；
步骤S12，按照指定方向推动投影设备运动指定步数。
在本实施例中，投影设备的移动参数包括移动步数和移动方向。所确定的推动投影设备的移动参数也包括移动步数和移动方向。
上述是完成对对焦位置的粗调，在移动误差较小的情况下，可以实现本发明实施例的技术方案，将粗调完成时投影设备的位置作为对焦位置。
可选的，在投影设备存在较大误差时，为了弥补移动误差，还可以进一步进行微调或校正。在本实施例中，根据所述移动参数推动所述投影设备至指定位置包括：
步骤S21，采集投影设备在第一位置投影到投影面的第一投影图像，其中，第一位置为投影设备按照指定方向运动指定步数后的位置；可选的，第一位置是粗调完成后投影设备停留的位置，或其他预估调整后投影设备停留的位置。
步骤S22，将投影设备在第一方向上从第一位置移动第一预定步数到达第二位置；可选的，第一预定步数可以是单位步数。可选的，第一方向可以是投影设备面向投影面的方向，或与之相反的方向。
步骤S23，比对投影设备在第二位置获取的第二投影图像和第一投影图像的清晰度；
步骤S24，在第二投影图像的清晰度高于第一投影图像的清晰度时，在第一方向上继续推动投影设备，直到在当前位置的清晰度低于前一次位置的清晰度时，将前一次位置对应的第三位置确定为清晰度最高的位置。即向第一方向进行逐步采集投影画面，并对投影画面进行逐帧比对，直到找到清晰度最高的投影画面，则将投影设备在此时的位置作为投影对焦的位置。
可选的，所述方法还包括：在第二投影图像的清晰度低于第一投影图像的清晰度时，步骤S31，在与第一方向相反的方向上推动投影设备，直到在当前位置的清晰度低于前一次位置的清晰度时，将前一次位置对应的第四位置确定为清晰度最高的位置。
可选的，本实施例可以但不限于通过以下方式获取投影设备到投影面的第一距离：红外测距、激光测距、超声波测距。
可选地，本实施例的所述方法还包括：，根据第一距离与移动投影设备的移动参数之间的对应关系，以及预设的距离与移动投影设备的移动参数之间的对应关系，确定用于推动投影设备的移动参数之前，步骤S41，判断对应关系中是否包括与第一距离对应的移动参数；
步骤S42，在判断结果为否时，发出提示信息，其中，提示信息用于提示手动调整投影设备的位置。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案本质上或者说对相关技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例的方法。
实施例二
在本实施例中提供了一种投影对焦的装置，该装置用于实现上述实施例及可选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置可通过软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图3是根据本发明实施例的投影对焦的装置的结构框图，如图3所示，该装置包括：
获取模块30，设置为获取投影设备到投影面的第一距离；
确定模块32，设置为根据预设的距离与投影设备的移动参数之间的对应关系确定所述第一距离对应的投影设备的移动参数，根据所述第一距离对应的投影设备的移动参数确定用于推动所述投影设备的移动参数；
推动模块34，设置为根据移动参数推动投影设备至指定位置，并将指定 位置确定为投影设备的对焦位置。
图4是根据本发明实施例的投影对焦的装置的可选结构框图，如图4所示，该装置除包括图3所示的所有模块外，推动模块34包括：
查找单元40，设置为在预设表格中查找得到与第一距离对应的指定步数和指定方向；
第一推动单元42，设置为按照指定方向推动投影设备运动指定步数。
图5是根据本发明实施例的投影对焦的装置的另一可选结构框图，如图5所示，基于前述图3或图4所示的投影对焦的装置，推动模块34包括：
采集单元50，设置为采集投影设备在第一位置投影到投影面的第一投影图像，其中，第一位置可以为投影设备按照指定方向运动指定步数后的位置；
第二推动单元52，设置为将投影设备在第一方向上从第一位置推动第一预定步数到达第二位置；
第一比对单元54，设置为比对投影设备在第二位置获取的第二投影图像和第一投影图像的清晰度；
第一确定单元56，设置为在第二投影图像的清晰度高于第一投影图像的清晰度时，在第一方向上继续推动投影设备，直到在当前位置的清晰度低于前一次位置的清晰度时，将前一次位置对应的第三位置确定为清晰度最高的位置。
可选地，所述推动模块34还包括：第二确定单元58，设置为在第二投影图像的清晰度低于第一投影图像的清晰度时，在与第一方向相反的方向上推动投影设备，直到在当前位置的清晰度低于前一次位置的清晰度时，将前一次位置对应的第四位置确定为清晰度最高的位置。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中。
实施例三
本实施例结合使用测距模块和摄像头进行对焦，以达到快速对焦的目的。 可以使用测距模块(红外、激光、超声波等)通过对投影光机模块投影距离和对焦完成时马达推动步数的测试，建立一个投影距离(有效投影距离：投影模块所支持的距离)和马达从起始位置开始推动步数的对应表格。即当测距装置测量出投影仪和投影幕布(或者墙面)之间距离，则根据查表法，马达快速推动相对应的步数，达到对焦位置。但是由于投影光机的一致性问题，生产出来的光机不可能完全一致，因此，不可能所有的光机都符合测出来的表格，单纯用查表法会造成相当部分的投影仪对焦不准，不清晰。所以，在推到相对应的步数后，马达小范围内的前推和后推，利用摄像头采集和对比图像，寻找最清晰图像位置，达到对焦即快又准的目的。
相对于相关技术，在硬件结构上，在投影镜头的侧面，增加测距模块和摄像头模组；
可选的，对于投影模块和测距模块，在使用前需要进行测试得出相应的参数，得到投影距离和对焦完成时马达推动步数的对应关系，还可以同时考虑马达推进步数的一致性问题，完成表格的建立，确定对应关系。投影设备都有最佳的投射距离和投影范围，如投影的最佳投射距离是50cm-5m，在这个范围之外的不能完成对焦投出清晰画面。在最佳投射范围内，进行测试，以合适的最小单位距离进行推进测试，例如1mm，建立表格，存储到投影仪的***中，以备使用。
表1是投射距离和镜头马达推进步数的第一对应关系表，记录为表1。因为这个表不能覆盖所有的距离值，而且每个投影模块都有差异性，所以测距对焦作为投影对焦的初步操作；
序号 投射距离 镜头马达推进步数
1 a(最佳投射距离最小值) N1
2 a+1mm N2
3 a+2mm N3
4 a+3mm N4
5 a+4mm N5
6 a+5mm N6
…… b(最佳投射距离最大值) Nx
表1
可选的，当投影仪的投影位置固定后(投影位置不变)，第一次开机(镜头在初始位置)测距装置测量投影到幕布(或墙面)的距离，根据表1查询，分为以下几种情况：1)测量距离小于最小投影距离或大于最大投影距离，则提示用户重新摆放投影到合适位置；2)测量距离与表1内测量的距离符合，例如测量距离为a+4mm，迅速通过马达推进到对应位置N5，***并记录已推进的步数N5；3)测量距离与表1内测量的距离不符合，例如测量距离x介于a+4mm和a+5mm之间，则以a+4mm距离为准，迅速通过马达推进到对应位置N5，***并记录已推进的步数N5。
在投影开启后，以情况3)中的操作为基础，打开摄像头采集图像，每推一步，摄像头采集一帧图像，然后和上一次采集的图像比较，如果变清晰，则马达再向前推一步，再采集一帧图像，再与前一帧图像进行对比，直到发现采集的图像比前一帧变模糊了，则前一帧的位置为对焦位置，快速完成对焦，并在表1的基础上再记录推进的步数M；
在表1的基础上，若测量距离x介于a+4mm和a+5mm之间，则以a+4mm距离为准，迅速通过马达推进到对应位置N5，***并记录已推进的步数N5。通过摄像头校正，再推进M步。
通过在使用过程中，边测量，边学习记录。可以建立一个更精确的表2，表2是投射距离和镜头马达推进步数的第二对应关系表。在使用中，如果又出现x距离，则不再用摄像头细调，直接推N5+M，更快达到对焦位置。表2中没有的精确位置，则按照前面步骤进行；
序号 投射距离 镜头马达推进步数
1 x N5+M
2 … ....
表2
***关机后，镜头位置保持投影位置不动，当再次启动***进行投影时，如果测距装置检测到离幕布(或墙面)的距离有变化，则重新对焦，此时镜头不用回退到初始位置，通过表1和表2，查找出马达需要推动的方向及步数，并记录推进的步数(以初始位置为起点)；
运用上述方案，可以达到快速对焦。
可选的，还可以通过测距装置作为对焦的触发条件。可以替换对焦触发条件是通过加速度传感器来实现对焦的情况，当发现机器有晃动时，加速度传感器上报数据，达到触发对焦的阈值，则开始对焦。如果用测距装置的操作结果作为对焦的触发条件，则当发现距离变化了，并在设定的时间内不变，触发对焦。
图6是根据本发明实施例三的投影对焦的流程图，如图6所示，包括：
步骤S601:找出投影距离和对焦完成时马达推动步数的对应关系，完成表格的建立；
在步骤中，对于投影模块，要进行细致的测试，找出投影距离和对焦完成时马达推动步数的对应关系，并同时考虑马达推进步数的一致性问题，完成表格的建立。
步骤S602:当投影位置固定，第一次开机后(镜头在初始位置)测距装置测量投影到幕布(或墙面)的距离，根据查表法，迅速通过马达推进到对应位置，***并记录已推进的步数；(如果测量距离超过投影模块支持的范围，查表法查不到对应距离，则***上提示用户调整距离)；
步骤S603:投影开启后，摄像头采集对比图像，马达小范围内推动镜头，快速完成对焦，并再记录推进的步数；
步骤S604：通过表1和摄像头进一步的校正，智能建立表2。通过表2的查询，更快达到对焦位置。若表2中没有的精确位置，则按照前面步骤进行；
步骤S605:***关机后，镜头位置不动，再次启动***，如果测距装置检测到离幕布(或墙面)的距离有变化，则重新对焦，此时镜头不用回退到初始位置，直接用查表法和上次记录的步数相参考，计算出需要推动的方向 及位置，并记录推进的步数(以初始位置为起点)。
本发明实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：
S1，获取投影设备到投影面的第一距离；
S2，根据第一距离与投影设备的移动参数之间的对应关系，以及预设的距离与投影设备的移动参数之间的对应关系，确定用于推动投影设备的移动参数；
S3，根据移动参数推动投影设备至指定位置，并将指定位置确定为投影设备的对焦位置。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行获取投影设备到投影面的第一距离；
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行根据第一距离与预设的距离与投影设备的移动参数之间的对应关系，确定用于推动投影设备的移动参数；
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行根据移动参数推动投影设备至指定位置，并将指定位置确定为投影设备的对焦位置。
可选地，本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。
显然，本领域的技术人员应该明白，上述的本申请的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在一些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者 将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本申请不限制于任何特定的硬件和软件结合。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序来指令相关硬件(例如处理器)完成，所述程序可以存储于计算机可读存储介质中，如只读存储器、磁盘或光盘等。可选地，上述实施例的全部或部分步骤也可以使用一个或多个集成电路来实现。相应地，上述实施例中的各模块/单元可以采用硬件的形式实现，例如通过集成电路来实现其相应功能，也可以采用软件功能模块的形式实现，例如通过处理器执行存储于存储器中的程序/指令来实现其相应功能。本申请不限制于任何特定形式的硬件和软件的结合。本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或者等同替换，而不脱离本申请技术方案的精神和范围，均应涵盖在本申请的权利要求范围当中。
工业实用性
上述技术方案可以达到快速自动对焦的效果。

Claims (10)

  1. 一种投影对焦的方法，包括：
    获取投影设备到投影面的第一距离；
    根据预设的距离与投影设备的移动参数之间的对应关系确定所述第一距离对应的投影设备的移动参数，根据所述第一距离对应的投影设备的移动参数确定用于推动所述投影设备的移动参数；
    根据所述移动参数推动所述投影设备至指定位置，并将所述指定位置确定为所述投影设备的对焦位置。
  2. 根据权利要求1所述的方法，其中，所述移动参数包括移动步数和移动方向；
    根据所述移动参数推动所述投影设备至指定位置包括：
    在预设表格中查找得到与所述第一距离对应的指定步数和指定方向；
    按照所述指定方向推动所述投影设备运动所述指定步数。
  3. 根据权利要求1所述的方法，其中，根据所述移动参数推动所述投影设备至指定位置包括：
    采集所述投影设备在第一位置投影到所述投影面的第一投影图像，其中，所述第一位置为所述投影设备按照指定方向运动指定步数后的位置；
    将所述投影设备在第一方向上从第一位置移动第一预定步数到达第二位置；
    比对所述投影设备在所述第二位置获取的第二投影图像和所述第一投影图像的清晰度；
    在所述第二投影图像的清晰度高于所述第一投影图像的清晰度时，在所述第一方向上继续推动所述投影设备，直到找到清晰度低于前一次移动对应的第三位置，确定所述第三位置为清晰度最高的位置。
  4. 根据权利要求3所述的方法，所述方法还包括：在所述第二投影图像的清晰度低于所述第一投影图像的清晰度时，在与所述第一方向相反的方向 上推动所述投影设备，直到找到清晰度低于前一次移动对应的第四位置，确定所述第四位置为清晰度最高的位置。
  5. 根据权利要求1所述的方法，其中，通过以下方式至少之一获取投影设备到投影面的第一距离：红外测距、激光测距、超声波测距。
  6. 根据权利要求1所述的方法，所述方法还包括：根据第一距离与移动所述投影设备的移动参数之间的对应关系，以及预设的距离与投影设备的移动参数之间的对应关系，确定用于推动所述投影设备的移动参数之前，所判断所述对应关系中是否包括与所述第一距离对应的移动参数；
    在判断结果为否时，发出提示信息，其中，所述提示信息用于提示手动调整所述投影设备的位置。
  7. 一种投影对焦的装置，包括：
    获取模块，设置为获取投影设备到投影面的第一距离；
    确定模块，设置为根据预设的距离与投影设备的移动参数之间的对应关系确定所述第一距离对应的投影设备的移动参数，根据所述第一距离对应的投影设备的移动参数确定用于推动所述投影设备的移动参数；
    推动模块，设置为根据所述移动参数推动所述投影设备至指定位置，并将所述指定位置确定为所述投影设备的对焦位置。
  8. 根据权利要求7所述的装置，其中，所述移动参数包括移动步数和移动方向；
    推动模块包括：
    查找单元，设置为在预设表格中查找得到与所述第一距离对应的指定步数和指定方向；
    第一推动单元，设置为按照所述指定方向推动所述投影设备运动所述指定步数。
  9. 根据权利要求7所述的装置，其中，所述推动模块包括：
    采集单元，设置为采集所述投影设备在第一位置投影到所述投影面的第一投影图像，其中，所述第一位置为所述投影设备按照指定方向运动指定步 数后的位置；
    第二推动单元，设置为将所述投影设备在第一方向上从第一位置推动第一预定步数到达第二位置；
    第一比对单元，设置为比对所述投影设备在所述第二位置获取的第二投影图像和所述第一投影图像的清晰度；
    第一确定单元，设置为在所述第二投影图像的清晰度高于所述第一投影图像的清晰度时，在所述第一方向上继续推动所述投影设备，直到在当前位置的清晰度低于前一次位置的清晰度时，将前一次位置对应的第三位置确定为清晰度最高的位置。
  10. 根据权利要求9所述的装置，其中，所述推动模块还包括：
    第二确定单元，设置为在所述第二投影图像的清晰度低于所述第一投影图像的清晰度时，在与所述第一方向相反的方向上推动所述投影设备，直到在当前位置的清晰度低于前一次位置的清晰度时，将前一次位置对应的第四位置确定为清晰度最高的位置。
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112799275A (zh) * 2019-11-13 2021-05-14 青岛海信激光显示股份有限公司 一种超短焦投影镜头调焦方法、调焦***及投影仪
CN112887691A (zh) * 2021-02-20 2021-06-01 歌尔光学科技有限公司 投影仪对焦方法、***及计算机可读存储介质
CN114885137A (zh) * 2021-11-16 2022-08-09 海信视像科技股份有限公司 一种投影设备及自动调焦方法
EP3933501A4 (en) * 2019-12-26 2022-12-14 Chengdu Xgimi Technology Co., Ltd METHOD AND DEVICE FOR PROJECTION FOCUSING, PROJECTOR AND READABLE STORAGE MEDIUM

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108909608B (zh) * 2018-06-06 2024-04-09 钧捷科技（北京）有限公司 一种激光投影自适应智能大灯
CN110087049A (zh) * 2019-05-27 2019-08-02 广州市讯码通讯科技有限公司 自动调焦***、方法以及投影仪
CN110769230B (zh) * 2019-08-02 2021-09-28 成都极米科技股份有限公司 一种对焦方法、装置及投影设备
CN112532864A (zh) * 2019-09-19 2021-03-19 上海锐瞻智能科技有限公司 一种自动对焦***及自动对焦方法
CN110996085A (zh) * 2019-12-26 2020-04-10 成都极米科技股份有限公司 一种投影仪调焦方法、投影仪调焦装置和投影仪
CN113301314B (zh) * 2020-06-12 2023-10-24 阿里巴巴集团控股有限公司 对焦方法、投影仪、成像设备和存储介质
CN112415841A (zh) * 2020-10-27 2021-02-26 歌尔智能科技有限公司 一种投影装置、投影***和投影方法
CN112104852B (zh) * 2020-11-16 2021-04-23 深圳市当智科技有限公司 基于宽屏拼接的操作指引方法、***及可读存储介质
CN112904653A (zh) * 2021-01-26 2021-06-04 四川长虹电器股份有限公司 用于投影设备的调焦方法和调焦装置
WO2023087948A1 (zh) * 2021-11-16 2023-05-25 海信视像科技股份有限公司 一种投影设备及显示控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060139582A1 (en) * 2004-12-27 2006-06-29 Kabushiki Kaisha Toshiba Projection display apparatus and focus adjustment method for the same
CN102591121A (zh) * 2012-02-21 2012-07-18 苏州佳世达光电有限公司 投影机自动对焦方法和使用该方法的投影***
CN104536249A (zh) * 2015-01-16 2015-04-22 深圳市中兴移动通信有限公司 调节投影仪焦距的方法和装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060139582A1 (en) * 2004-12-27 2006-06-29 Kabushiki Kaisha Toshiba Projection display apparatus and focus adjustment method for the same
CN102591121A (zh) * 2012-02-21 2012-07-18 苏州佳世达光电有限公司 投影机自动对焦方法和使用该方法的投影***
CN104536249A (zh) * 2015-01-16 2015-04-22 深圳市中兴移动通信有限公司 调节投影仪焦距的方法和装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112799275A (zh) * 2019-11-13 2021-05-14 青岛海信激光显示股份有限公司 一种超短焦投影镜头调焦方法、调焦***及投影仪
CN112799275B (zh) * 2019-11-13 2023-01-06 青岛海信激光显示股份有限公司 一种超短焦投影镜头调焦方法、调焦***及投影仪
EP3933501A4 (en) * 2019-12-26 2022-12-14 Chengdu Xgimi Technology Co., Ltd METHOD AND DEVICE FOR PROJECTION FOCUSING, PROJECTOR AND READABLE STORAGE MEDIUM
US11849263B2 (en) 2019-12-26 2023-12-19 Chengdu Xgimi Technology Co., Ltd. Projection focusing method, projection focusing apparatus, projector, and readable storage medium
CN112887691A (zh) * 2021-02-20 2021-06-01 歌尔光学科技有限公司 投影仪对焦方法、***及计算机可读存储介质
CN114885137A (zh) * 2021-11-16 2022-08-09 海信视像科技股份有限公司 一种投影设备及自动调焦方法
CN114885137B (zh) * 2021-11-16 2024-05-31 海信视像科技股份有限公司 一种投影设备及自动调焦方法

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