CN111343443A - Optical zooming focusing method, projection device and storage medium - Google Patents
Optical zooming focusing method, projection device and storage medium Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
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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]
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Abstract
The present disclosure relates to the field of projectors, and more particularly, to a focusing method for optical zooming, a projection apparatus, and a storage medium; the method comprises the following steps: acquiring an instruction; controlling a focusing mechanism and a zooming mechanism to adjust the definition and/or size of a projection picture according to the instruction; the zoom mechanism and the focusing mechanism are controlled to move synchronously, the image is zoomed, the image is clear, multiple operations are avoided, and the user experience is improved.
Description
Technical Field
The present disclosure relates to the field of projectors, and in particular, to a focusing method for optical zooming, a projection apparatus, and a storage medium.
Background
On a projection device with optical zoom, the optical zoom mechanism can achieve the size scaling of the whole projection picture, but a new problem is brought by the change of the moving focal length of the lens: the picture becomes blurred. The traditional processing method adopts zooming operation to convert the picture to a proper size and then focus to ensure the picture to be clear; the two operations result in a poor user experience. Therefore, the invention provides an optical zooming focusing method, which ensures that the zooming of an optical zooming image is ensured, the image is clear, and the user experience is improved.
Disclosure of Invention
An object of the embodiments of the present application is to provide a focusing method for optical zooming, a projection apparatus and a storage medium to solve the above problems.
In a first aspect, an optical zooming focusing method provided in an embodiment of the present application is applied to a projection apparatus, where the projection apparatus includes a processor, a focusing mechanism, and a zooming mechanism, and includes:
acquiring an instruction;
and controlling a focusing mechanism and a zooming mechanism to adjust the definition and/or size of the projection picture according to the instruction.
Preferably, the step of controlling the focusing mechanism and the zooming mechanism to adjust the definition and/or size of the projection picture according to the instruction comprises the following steps:
and controlling the focusing mechanism and the zooming mechanism to synchronously move according to the instruction, so that the projection picture is kept clear when the size of the projection picture is changed.
Preferably, in the step of controlling the focusing mechanism and the zooming mechanism to move synchronously according to the instruction, the focusing mechanism and the zooming mechanism are controlled to move according to a relational expression.
Preferably, the focusing mechanism and the zooming mechanism are controlled to synchronously move under a fixed projection distance according to a first relationd=f(b)，bIndicates the number of zoom stroke steps of the zoom mechanism,dindicates the number of steps of the focusing stroke of the focusing mechanism,f（）the functional relationship between the number of zoom stroke steps of the zoom mechanism and the number of focus stroke steps of the focus mechanism is shown.
Preferably, the focusing mechanism and the zooming mechanism are controlled to synchronously move under the non-fixed projection distance according to a second relationz=f'（x,y），yIndicates the number of zoom stroke steps of the zoom mechanism,xthe projected distance is represented as a function of,zindicates the number of steps of the focusing stroke of the focusing mechanism,f'（）the projection distance, the number of zoom steps of the zoom mechanism, and the number of focus steps of the focus mechanism are expressed as a functional relationship.
Preferably, the minimum moving unit of the zoom mechanism during the movement of the zoom mechanism and the focus mechanismb min Satisfy the requirement ofb min =△b/a，△bWhich indicates the distance the zoom mechanism has moved,aa minimum moving unit of the focusing mechanism representing the greatest common divisor of the moving distance of the zooming mechanism and the moving distance of the focusing mechanismd min Satisfy the requirement ofd min =f（b min ）。
Preferably, the minimum moving unit of the zoom mechanism during the movement of the zoom mechanism and the focus mechanismy min Satisfy the requirement ofy min =△y/a'，△yWhich indicates the distance the zoom mechanism has moved,xthe projected distance is represented as a function of,a'a minimum moving unit of the focusing mechanism representing the greatest common divisor of the moving distance of the zooming mechanism and the moving distance of the focusing mechanismz min Satisfy the requirement ofz min = f'（x, y min ）。
Preferably, the obtaining of the first relation comprises the following steps:
changing the zooming stroke steps of the zooming mechanism under a fixed projection distance, simultaneously recording the focusing stroke steps of the focusing mechanism corresponding to the clear points, and acquiring the zooming stroke steps of the multiple groups of zooming mechanisms and the focusing stroke steps of the focusing mechanism;
and fitting a first relational expression according to the zooming stroke steps of the multiple groups of zooming mechanisms and the focusing stroke steps of the focusing mechanism.
Preferably, the obtaining of the second relation comprises the following steps:
changing the zooming stroke step number of the zooming mechanism under a plurality of projection distances, simultaneously recording the focusing stroke step number of the focusing mechanism corresponding to the clear point, and acquiring a plurality of groups of projection distances, the zooming stroke step number of the zooming mechanism and the focusing stroke step number data of the focusing mechanism;
and fitting a second relational expression according to the multiple groups of projection distances, the zooming stroke step number of the zooming mechanism and the focusing stroke step number data of the focusing mechanism.
Preferably, the controlling the focusing mechanism and the zooming mechanism according to the instruction to adjust the definition and/or size of the projection picture comprises the following steps:
the instruction comprises a parameter indicating the distance;
and controlling the focusing mechanism to move after controlling the zooming mechanism to move according to the parameter value change detection result of the indication distance in the instruction.
Preferably, the acquiring of the parameter value change detection result indicating the distance includes the steps of:
acquiring a parameter value indicating the distance at fixed time;
judging whether the parameter value difference value of adjacent indication distances exceeds a threshold value or not, and if so, acquiring a change detection result as distance change; if not, the distance is unchanged as the change detection result is obtained.
In a second aspect, a projection apparatus provided in an embodiment of the present application includes a processor and a motor, where the motor is configured to rotate to achieve focusing or zooming; and the processor is connected with the motor and executes a computer program to realize the focusing method of the optical zoom in the above or any one of the above embodiments.
In a third aspect, an embodiment of the present application further provides a storage medium, where a computer program is stored on the storage medium, and when the computer program is executed, the optical zoom focusing method provided in the first aspect or any optional implementation manner of the first aspect is implemented.
The application has the following technical effects:
1. according to the method and the device, the focusing mechanism and the zooming mechanism are triggered to move synchronously according to the instruction, so that the operation times of a user are reduced, and the purpose of clearly displaying the image in the zooming process of the projection image is realized;
2. the focusing mechanism and the zooming mechanism synchronously move according to the relational expression, and the continuous and clear zooming of the picture in the picture adjusting process is ensured;
3. the focusing mechanism and the zooming mechanism carry out different motions according to the situations of fixed projection distance and non-fixed projection distance, and can be suitable for various user scenes;
4. according to the method and the device, the minimum moving unit is adopted to move in the movement process of the focusing mechanism and the zooming mechanism, so that stable adjustment under the condition of user triggering is facilitated, meanwhile, the focusing mechanism and the minimum moving unit of the zooming mechanism are in a mapping relation, more accurate adjustment and stable adjustment are facilitated, and continuous and clear zooming of a picture is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a flow chart of the method of example 1 of the present application;
fig. 2 is a flowchart of embodiment 1 of the present application for controlling the focusing mechanism and the zooming mechanism to move synchronously according to the instruction;
fig. 3 is a schematic diagram of a first relational expression in embodiment 1 or embodiment 3 of the present application;
FIG. 4 is a diagram illustrating a second relation of embodiment 2 of the present application;
fig. 5 is a schematic structural diagram of an optical machine portion of a projection apparatus according to embodiment 5 of the present application;
fig. 6 is a flowchart illustrating a process of controlling the movement of the focusing mechanism after the zooming mechanism is controlled to move according to a detection result of a change in a parameter value indicating a distance in an instruction in the method of the present application in embodiment 4;
fig. 7 is a flowchart of obtaining a detection result of a change in a parameter value indicating a distance in embodiment 4 of the present application;
fig. 8 is a schematic diagram of the wire connection of the projection device in embodiment 5 of the present application.
Reference numerals: 1-a zoom motor; 2-a light machine; 3-a focus motor; 4-a gear assembly; 5-lens.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Furthermore, it should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The inventor researches and finds that on a projection device with optical zooming, the optical zooming mechanism can realize the size scaling of the whole projection picture, but a new problem is caused by the change of the moving focal length of the lens: the picture becomes blurred. The traditional processing method adopts zooming operation to convert the picture to a proper size and then focus to ensure the picture to be clear; the two operations result in a poor user experience. Therefore, the invention provides an optical zooming focusing method, which ensures that the zooming of an optical zooming image is ensured, the image is clear, and the user experience is improved.
Based on the above research findings, the applicant proposes a focusing method of optical zooming.
Example 1
An electric focusing method for optical zooming, as shown in fig. 1, comprises the following steps:
acquiring an instruction;
and controlling a focusing mechanism and a zooming mechanism to adjust the definition and/or size of the projection picture according to the instruction.
Specifically, as shown in fig. 2, the focusing mechanism and the zooming mechanism are controlled to move synchronously according to the instruction, so that the projection picture is kept clear when the size is changed.
After receiving the instruction, controlling the focusing mechanism to rotate towards a first direction, and controlling the zooming mechanism to synchronously rotate towards the first direction or a second direction opposite to the first direction; the synchronization here includes synchronization without time difference or synchronization with a certain error, the rotation direction is set according to a specific design, and the first direction may be clockwise or counterclockwise; correspondingly, the second direction is counter-clockwise or clockwise.
If the command is a zooming command, the focusing mechanism rotates clockwise, and the zooming mechanism synchronously rotates clockwise or anticlockwise; if the command is a focusing command, the focusing mechanism rotates clockwise, and the zooming mechanism synchronously rotates clockwise or anticlockwise. The command includes a zoom command, a focusing command, a screen adjustment command, an up-down key command, or an add-down key command, and may be a command capable of triggering focusing or zooming, which is not limited herein.
The instruction acquisition mode comprises one or more of a remote controller acquisition mode, a voice acquisition mode, a camera acquisition mode and a sensor acquisition mode; for example, a focusing key or a zooming key or a "+"/"-" key is arranged on the remote controller, the key is triggered, the processor generates a command for controlling the motor after acquiring triggering information, and the command includes one or more of command type, rotating direction, rotating angle/each time, linkage speed, minimum moving unit and relational expression; the voice key can be used for replacing a focusing key, the image definition can be collected through the camera to judge whether the image needs to be adjusted or not, or the distance between the camera and the projection plane is detected according to the distance sensor, and the image needs to be adjusted or not is determined according to the size of the image collected by the camera and the distance between the camera and the projection plane. The specific instruction acquisition mode can be selected and set according to actual conditions.
One embodiment is exemplified according to the above scheme, which specifically includes the following steps:
and controlling the focusing mechanism and the zooming mechanism to move according to a relational expression in the synchronous motion.
Controlling the focusing mechanism and the zooming mechanism to synchronously move at a fixed projection distance according to a first relation, as shown in FIG. 3d=f(b)，bIndicates the number of zoom stroke steps of the zoom mechanism,dindicates the number of steps of the focusing stroke of the focusing mechanism,f（）the functional relationship between the number of zoom stroke steps of the zoom mechanism and the number of focus stroke steps of the focus mechanism is shown.
As shown in fig. 5, the focusing mechanism includes a focusing motor or a focusing motor and a gear assembly connected to the focusing motor, the zooming mechanism includes a zooming motor or a zooming motor and a gear assembly connected to the zooming motor, the gear assembly is connected to the lens assembly, the motor is connected to the gear assembly, and the gear assembly is connected to the lens assembly to achieve focusing and zooming.
The obtaining of the first relation comprises the following steps:
the obtaining of the first relation comprises the following steps:
changing the zooming stroke steps of the zooming mechanism under a fixed projection distance, simultaneously recording the focusing stroke steps of the focusing mechanism corresponding to the clear points, and acquiring the zooming stroke steps of the multiple groups of zooming mechanisms and the focusing stroke steps of the focusing mechanism;
and fitting a first relational expression according to the zooming stroke steps of the multiple groups of zooming mechanisms and the focusing stroke steps of the focusing mechanism.
As shown in fig. 3, when the first relation d = f (b) is calibrated at the factory stage, the projection distance is fixed at a numerical value or a numerical range, the zoom stroke position (zoom stroke step number) is rotated from the starting point to the first marked point b1, the best point d1 of the focus stroke position (focus stroke step number) is correspondingly found, i.e. the clearest point of the picture, the (b 1, d 1) is used as a point of the first relation, multiple sets of data are obtained through multiple data calibration and tests, and the first relation is obtained through fitting, so that the zoom motor and the focus motor move or rotate along the first relation, and the picture is zoomed and is guaranteed to be clear. The fitting of the first relation can also be obtained by the structural design of the optical machine.
In specific implementation, the total stroke of the zoom motor is 1500 steps, and the stroke of the focus motor is 1800 steps; the distance from the current projection position to the wall surface, namely the projection distance, is 2m, at this time, the zoom position is an 850-step position, and the focus position is a 600-step position. If the command is a zoom command, the zoom command is triggered by "+, -" in the remote controller, and which key is specifically set as a zoom trigger key is not limited herein; moving 1% step number according to a '+' zooming position, namely +18 steps, a zooming stroke position is 868 step position, amplifying a picture, wherein an amplified reference point is at the optical center designed by an optical machine, particularly related to the design, and moving +12 steps according to d = f (b) a focusing stroke position, namely 612 step position, and simultaneously, the picture definition is from clear (a state before adjustment) to fuzzy (a state caused by zooming) and from fuzzy to clear; moving by 1% step number according to a minus zoom stroke position, namely-18 steps, the zoom stroke position is a position at 832 steps, the picture is reduced, and according to d = f (b), the step number of the movement of the focus stroke position is-12 steps, namely a position at 588 steps, and meanwhile, the picture definition is changed from clear (a state before adjustment) to fuzzy (a state caused by zooming) and is changed from fuzzy to clear; the synchronous movement of the two is realized according to the first relational expression by the embodiment, and the target position is synchronously reached.
The picture is kept clear all the time when the size of the picture is changed by the synchronous motion of the focusing mechanism and the zooming mechanism, so that the change of the projection picture is the size change; however, due to factors such as errors, the change in the sharpness of the picture may be perceived by the human eye, and thus the sharpness changes. Therefore, when the effect is optimal, the projection picture only has picture size change in the zooming and focusing process, and the picture is always kept clear; when the effect is not optimal, the size and the definition of a projection picture are changed in the zooming and focusing process; if the user does not have the zooming requirement, the focusing is triggered by the instruction, and the size of the projection picture is changed.
The focusing mechanism and the zooming mechanism move synchronously under the scene of fixed distance according to the instruction, and the image is kept clear all the time in the process of adjusting the image.
Example 2
This embodiment is different from embodiment 1 in that in the case where the projection distance is changed during the synchronous movement of the focusing mechanism and the zooming mechanism,
controlling the focusing mechanism and the zooming mechanism to synchronously move under the non-fixed projection distance according to a second relationz=f'（x,y），yIndicates the number of zoom stroke steps of the zoom mechanism,xthe projected distance is represented as a function of,zindicates the number of steps of the focusing stroke of the focusing mechanism,f'（）the projection distance, the number of zoom steps of the zoom mechanism, and the number of focus steps of the focus mechanism are expressed as a functional relationship.
The obtaining of the second relation comprises the following steps:
changing the zooming stroke step number of the zooming mechanism under a plurality of projection distances, simultaneously recording the focusing stroke step number of the focusing mechanism corresponding to the clear point, and acquiring a plurality of groups of projection distances, the zooming stroke step number of the zooming mechanism and the focusing stroke step number data of the focusing mechanism;
and fitting a second relational expression according to the multiple groups of projection distances, the zooming stroke step number of the zooming mechanism and the focusing stroke step number data of the focusing mechanism.
Specifically, as shown in fig. 4, the projection distance is x, the number of movement steps required for zooming by the zoom mechanism is y, the number of movement steps required for focusing by the focus mechanism is z, and z = f (x, y). Then, the number y of moving steps required by zooming of the zooming mechanism is changed at each projection distance, namely, x is changed (the projection distance is 40 cm-400 cm), the image is adjusted to be clear at each position, the number z of moving steps required by focusing of the focusing mechanism at the moment is recorded, and finally, a second relational expression z = f (x, y) can be obtained, wherein the second relational expression can be a curve, for example, a curve which is changed along with x (40 cm-400 cm) and along with y (0-maximum zooming motor step number).
Fitting second relational data: and according to the obtained data, fitting a second relation z = f (x, y) by adopting one or more modes of polynomial approximation, exponential approximation and Gaussian approximation, and selecting the mode in consideration of the mode with the minimum fitting deviation. The fitting of the second relation can also be obtained by the optical-mechanical structural design.
Under the condition of non-fixed distance, the zooming mechanism and the focusing mechanism synchronously move, so that the change of a projection picture is realized, meanwhile, the definition is kept unchanged or relatively unchanged, the user experience is improved, and the user experience under various use scenes is improved.
Example 3
This embodiment is different from embodiment 1 or 2 in that the minimum moving unit and the moving speed are optimized in the synchronized movement of the zoom mechanism and the focus adjustment structure.
For example, a user triggers zooming, and a zooming range cannot be predetermined in advance, so that the zooming distance is divided, the entire zooming process is realized by using a plurality of minimum moving units, and the minimum moving unit of the focusing mechanism and the minimum moving unit of the zooming mechanism are in a mapping relationship, for example, the mapping relationship is a first relational expression at a fixed distance.
Minimum moving unit of zooming mechanism in moving process of zooming mechanism and focusing mechanism under fixed distanceb min Satisfy the requirement ofb min =△b/a，△bWhich indicates the distance the zoom mechanism has moved,athe greatest common divisor of the moving distance of the zoom mechanism and the moving distance of the focus mechanism,a=m（△b，△d），△dwhich indicates the distance the focusing mechanism has moved,m（）the minimum moving unit of the focusing mechanism is represented by taking the greatest common divisor between variables in bracketsd min Satisfy the requirement ofd min =f（b min ）。
As shown in fig. 3, it is assumed that the focus motor in the focus mechanism moves 21 steps from d1 to d2, and the zoom motor in the zoom mechanism moves 30 steps from d1 to d 2; the minimum number of steps of the moving unit of the two motors is the number of steps divided by the greatest common divisor, i.e., 7 steps for focusing and 10 steps for zooming. Namely, the focusing motor moves once and walks for 7 steps, the zooming motor moves once and walks for 10 steps, and after three times of movement, the target position is synchronously reached; the precision and the stability in the motion process can be ensured by accumulating the motion of the stroke through the minimum mobile unit. The synchronous motion in the application comprises synchronous starting until synchronous ending, and also comprises asynchronous ending of synchronous starting; the existence of an allowable error in the synchronization process does not mean a complete match in time.
Because the zoom mechanism and the focusing mechanism are not consistent, the movement speeds of the zoom mechanism and the focusing mechanism are possibly inconsistent, so that the movement speeds of the zoom mechanism and the focusing mechanism need to be considered, the simultaneous reaching of the target position is ensured, the relation curve is approached as much as possible, and the clear picture in the zooming process is ensured.
In synchronous motion control, the moving time of the zooming mechanism in the motion process is satisfiedt b =l（b min ,v）The moving time of the focusing mechanism in the moving process is satisfiedt d =l（d min ,v），vIndicating the speed of the zoom mechanism or the focus mechanism,l（）the functional relationship between the minimum moving unit of the zoom mechanism and the speed of the zoom mechanism or between the minimum moving unit of the focus mechanism and the speed of the focus mechanism is shown.
For example, the focusing mechanism performs focusing by the minimum moving unit 7, and the zooming mechanism performs zooming by the minimum moving unit 10. There may be differences in time due to differences in the torque of the various mechanisms and the speed of the drive mechanism. In order to improve user experience, under the condition of a minimum moving unit, a focusing motor in a focusing mechanism and a zooming motor in a zooming mechanism simultaneously complete movement, if the speeds of the two motors are the same and are 1 step/1 ms, the focusing motor moves for 7 steps, and under the condition that the zooming motor moves for 10 steps, the focusing motor needs to averagely distribute 3ms in advance to 7 steps of movement for delayed waiting, so that the two motors are ensured to synchronously complete the movement of the minimum moving unit, and in actual movement, due to factors such as mechanical loss, errors can exist when the two motors complete the movement of the minimum moving unit.
The minimum moving unit of the zooming mechanism in the moving process of the zooming mechanism and the focusing mechanism under the condition of non-fixed distancey min Satisfy the requirement ofy min =△y/a'，△yWhich indicates the distance the zoom mechanism has moved,xthe projected distance is represented as a function of,a'the greatest common divisor of the moving distance of the zoom mechanism and the moving distance of the focus mechanism,a'=m'（△y，△z），m'() Indicating the greatest common divisor between the variables in parentheses, △zMeans for indicating the distance of movement of the focusing mechanism, the minimum unit of movement of the focusing mechanismz min Satisfy the requirement ofz min = f'（x, y min ）。
The minimum moving unit of the zooming mechanism and the focusing mechanism is controlled to be in a mapping relation with the corresponding number of steps of the zooming mechanism and the focusing mechanism needing to move in the whole process, so that the stability of synchronous control is ensured, and meanwhile, the moving time of the minimum moving unit of the zooming mechanism and the focusing mechanism in synchronous movement is controlled to be consistent, so that the stability of synchronous control and the stability of pictures are ensured.
Example 4
The present embodiment is different from the above-described embodiments in that, as shown in fig. 6, the command includes a parameter indicating the distance, and the movement of the zoom mechanism is controlled based on the detection result of the change in the parameter value indicating the distance in the command, and then the movement of the focus mechanism is controlled.
In particular, the parameter may be a time parameter (using a TOF sensor) or a distance parameter or other parameter enabling the acquisition of a distance.
As shown in fig. 7, the acquisition of the parameter value change detection result indicating the distance includes the steps of:
acquiring a parameter value indicating the distance at fixed time;
judging whether the parameter value difference value of adjacent indication distances exceeds a threshold value or not, and if so, acquiring a change detection result as distance change; if not, the distance is unchanged as the change detection result is obtained. The threshold may be 20cm, which is not limited herein, and may be set according to a specific use scenario. The details of the distance detection are also applicable to the step of distance judgment in the above embodiment.
If the detection result of the parameter value change of the indicated distance is that the distance is not changed, the zoom mechanism is controlled to move according to the first relational expression (as described in the above embodiment), and then the focusing mechanism is controlled to move, so that the zoom mechanism and the focusing mechanism move asynchronously at a fixed distance, the picture is kept clear all the time in the process of the size change of the picture (when the effect is optimal), and if the control has an error, the picture is kept relatively clear. The zoom mechanism and the focusing mechanism can also be controlled to move synchronously, so that the moving process meets the first relational expression, and the picture change is as described above.
If the detection result of the parameter value change of the indication distance is distance change, the focusing mechanism is controlled to move according to a second relational expression (projection distance-focusing stroke step number) to enable the picture to be clear, then the focusing mechanism and the zooming mechanism are controlled to move synchronously or asynchronously according to the second relational expression (focusing stroke step number-zooming stroke step number), after the picture is from fuzzy to clear, when the picture definition is changed to be large in the process of changing the picture size or in the process of changing the picture size, the picture is from clear to fuzzy and then is from fuzzy to clear, when the picture is changed to be small, the picture is kept clear all the time.
And controlling the zooming mechanism and the focusing mechanism to move synchronously or asynchronously according to the parameter value change detection result of the indication distance in the instruction, so that the size of the picture is kept clear all the time when the size of the picture is changed, multiple operations of a user are avoided, and the user experience is improved.
Example 5
Based on the same inventive concept as the focusing method of the optical zoom, the embodiment of the application also provides a projection device.
Referring to fig. 8 and fig. 5, a projection apparatus provided in an embodiment of the present application includes a motor and a processor, where the motor is used for rotating to achieve focusing or zooming; and the processor is connected with the motor and executes a computer program to realize the focusing method of the optical zoom. The structure schematic diagram is shown in fig. 5, a focusing motor 1 and a zooming motor 3 are arranged on an optical mechanical part, the zooming motor 3 is connected with a lens 5 after being connected with a gear assembly 4, the focusing motor 1 is connected with a transmission assembly (not shown) and is connected with a focusing part lens assembly, the motor and a processor can be driven by a driving module or without the driving module, and the determination is specifically determined according to the type and parameters of the motor and the type and parameters of the processor. A telecommunications device connection diagram is shown in fig. 8. The projection device comprises a sensor, wherein the sensor adopts a distance sensor, the distance sensor adopts a TOF sensor, the distance between the projection device and a projection surface is detected, and the sensor is electrically connected with a processor to realize transmission of distance data. The distance sensor may also be an ultrasonic sensor, a laser radar sensor, or an infrared sensor, which is prior art and will not be described herein.
It should be understood that the structure shown in fig. 5 or 8 is merely an illustration, and the projection apparatus provided in the embodiment of the present application may also have fewer or more components than those in fig. 5 or 8, or have a different configuration from that shown in fig. 5 or 8, and the embodiment of the present application is not limited thereto.
Example 6
Based on the same inventive concept as the focusing method of the optical zoom, the embodiment of the application also provides a projection system.
The projection system comprises an instruction acquisition module and a control module, wherein the instruction acquisition module is used for acquiring an instruction, the control module is used for controlling a focusing mechanism and a zooming mechanism according to the instruction module and adjusting the definition and/or size of a projection picture, and the projection system further comprises a distance detection module which is used for detecting the distance between the projection system and the projection plane. The details of controlling the focusing mechanism and the zooming mechanism are the same as the above embodiments, and are not described herein.
In addition, an embodiment of the present application further provides a storage medium, where a computer program is stored on the storage medium, and when the computer program is executed, the method for focusing an optical zoom provided in the foregoing method embodiment is implemented.
In summary, the pass acquisition instruction provided by the present application; controlling a focusing mechanism and a zooming mechanism to adjust the definition and/or size of a projection picture according to the instruction; the zoom mechanism and the focusing mechanism are controlled to be synchronous, the zooming and the zooming are realized, meanwhile, the image is clear, multiple operations are avoided, and the user experience is improved.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in each embodiment of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method described in each embodiment of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Random Access Memory (RAM), a Read Only Memory (ROM), a magnetic disk, or an optical disk.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Moreover, it is noted that, in this document, relational terms such as "first," "second," "third," and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Claims (13)
1. A focusing method of optical zooming is characterized in that the method is applied to a projection device, the projection device comprises a processor, a focusing mechanism and a zooming mechanism, and the method comprises the following steps:
acquiring an instruction;
and controlling a focusing mechanism and a zooming mechanism to adjust the definition and/or size of the projection picture according to the instruction.
2. The focusing method of optical zoom according to claim 1, wherein controlling the focusing mechanism and the zooming mechanism to adjust the definition and/or size of the projection screen according to the instruction comprises the following steps:
and controlling the focusing mechanism and the zooming mechanism to synchronously move according to the instruction, so that the projection picture is kept clear when the size of the projection picture is changed.
3. The method as claimed in claim 2, wherein the controlling of the focusing mechanism and the zooming mechanism in synchronous movement according to the command controls the focusing mechanism and the zooming mechanism to move according to a relation.
4. The method as claimed in claim 3, wherein the focusing mechanism and the zooming mechanism are controlled to move synchronously according to a first relation in a fixed projection distanced=f(b)，bIndicates the number of zoom stroke steps of the zoom mechanism,dindicates the number of steps of the focusing stroke of the focusing mechanism,f（）the functional relationship between the number of zoom stroke steps of the zoom mechanism and the number of focus stroke steps of the focus mechanism is shown.
5. The method as claimed in claim 3, wherein the focusing mechanism and the zooming mechanism are controlled to move synchronously according to a second relation in the non-fixed projection distancez=f'（x,y），yIndicates the number of zoom stroke steps of the zoom mechanism,xthe projected distance is represented as a function of,zindicates the number of steps of the focusing stroke of the focusing mechanism,f'（）the projection distance, the number of zoom steps of the zoom mechanism, and the number of focus steps of the focus mechanism are expressed as a functional relationship.
6. The method as claimed in claim 4, wherein the minimum moving unit of the focusing mechanism during the movement of the focusing mechanism and the zooming mechanismb min Satisfy the requirement ofb min =△b/a，△bWhich indicates the distance the zoom mechanism has moved,aa minimum moving unit of the focusing mechanism representing the greatest common divisor of the moving distance of the zooming mechanism and the moving distance of the focusing mechanismd min Satisfy the requirement ofd min =f（b min ）。
7. The optical zoom focusing method of claim 5, wherein the minimum moving unit of the zoom mechanism during the movement of the zoom mechanism and the focusing mechanismy min Satisfy the requirement ofy min =△y/a'，△yWhich indicates the distance the zoom mechanism has moved,xthe projected distance is represented as a function of,a'a minimum moving unit of the focusing mechanism representing the greatest common divisor of the moving distance of the zooming mechanism and the moving distance of the focusing mechanismz min Satisfy the requirement ofz min = f'（x, y min ）。
8. The method as claimed in claim 4, wherein the obtaining of the first relation comprises the following steps:
changing the zooming stroke steps of the zooming mechanism under a fixed projection distance, simultaneously recording the focusing stroke steps of the focusing mechanism corresponding to the clear points, and acquiring the zooming stroke steps of the multiple groups of zooming mechanisms and the focusing stroke steps of the focusing mechanism;
and fitting a first relational expression according to the zooming stroke steps of the multiple groups of zooming mechanisms and the focusing stroke steps of the focusing mechanism.
9. The method as claimed in claim 5, wherein the obtaining of the second relation comprises the steps of:
changing the zooming stroke step number of the zooming mechanism under a plurality of projection distances, simultaneously recording the focusing stroke step number of the focusing mechanism corresponding to the clear point, and acquiring a plurality of groups of projection distances, the zooming stroke step number of the zooming mechanism and the focusing stroke step number data of the focusing mechanism;
and fitting a second relational expression according to the multiple groups of projection distances, the zooming stroke step number of the zooming mechanism and the focusing stroke step number data of the focusing mechanism.
10. The focusing method of optical zoom according to claim 1, wherein the controlling the focusing mechanism and the zooming mechanism according to the instruction to adjust the definition and/or size of the projection screen comprises the following steps:
the instruction comprises a parameter indicating the distance;
and controlling the focusing mechanism to move after controlling the zooming mechanism to move according to the parameter value change detection result of the indication distance in the instruction.
11. The focusing method of optical zoom according to claim 10, wherein the step of obtaining the detection result of the change in the parameter value indicating the distance comprises the steps of:
acquiring a parameter value indicating the distance at fixed time;
judging whether the parameter value difference value of adjacent indication distances exceeds a threshold value or not, and if so, acquiring a change detection result as distance change; if not, the distance is unchanged as the change detection result is obtained.
12. A projection device, comprising:
a motor for rotating to realize focusing or zooming;
a processor connected to the motor for executing a computer program to implement the focusing method of optical zoom claimed in any one of claims 1 to 11.
13. A storage medium having a computer program stored thereon, wherein the computer program, when executed, implements the optical zoom focusing method of any one of claims 1 to 11.
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