CN107277477A - Gap compensation method, blank compensation apparatus and projector equipment - Google Patents
Gap compensation method, blank compensation apparatus and projector equipment Download PDFInfo
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- CN107277477A CN107277477A CN201710699917.9A CN201710699917A CN107277477A CN 107277477 A CN107277477 A CN 107277477A CN 201710699917 A CN201710699917 A CN 201710699917A CN 107277477 A CN107277477 A CN 107277477A
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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]
- 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]
- H04N9/3179—Video signal processing therefor
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- Engineering & Computer Science (AREA)
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Abstract
Gap compensation method, blank compensation apparatus and projector equipment that the present invention is provided, are related to focus technique field.Wherein, gap compensation method includes：The definition of the corresponding projected picture of each focal length is obtained, and each definition is compared obtains best sharpness；If the definition of the corresponding projected picture of current focus is less than the best sharpness, calculate the ray machine from current focus be adjusted to the focal length of the best sharpness correspondence projected picture when drive device need to rotate the first quantity of step-length；The drive device is controlled to rotate the second quantity step-length according to current operation direction in opposite direction；The drive device is controlled according to the difference step-length that second quantity and first quantity are rotated with current operation direction in opposite direction.By the rotation in above-mentioned direction in opposite direction with current operation twice, it can solve to cause the problem of focus adjustment accuracy is low because there is gap between drive device and ray machine.
Description
Technical field
The present invention relates to focusing technical field, in particular to a kind of gap compensation method, blank compensation apparatus and throwing
Shadow equipment.
Background technology
Constantly expand with the application of projector equipment, progressively expanded to from commercial office field education and study and
Family life field.With being continuously increased for application field, user also increasingly payes attention to the drop shadow effect of projector equipment, especially
It is that the definition of image quality directly affects the experience of user.The focal length when definition of image quality is typically projected with projector equipment
Correlation, therefore when carrying out projection operation using projector equipment, focus operation can be carried out, to obtain the projection that image quality definition is high
Picture.
In the prior art, typically using technology of auto, to complete focus operations.Automatic focusing be usually by and
Projector equipment the is associated or image acquiring device of itself is judged the definition of projected picture, controls to drive so as to pass through
Device and ray machine complete focus operation.
Study and find through inventor, because drive device is difficult to direct drive ray machine focusing in existing technology of auto
To the position of best sharpness correspondence focal length, therefore need in focussing process to carry out the focus operations of an opposite direction.But,
Due to being limited between drive device and ray machine by attachment structure, gap is generally there are, and then cause drive device in driving light
Machine carries out causing the problem of focus adjustment accuracy is low because of the presence in gap during the focus operations of opposite direction.
The content of the invention
In view of this, it is an object of the invention to provide a kind of gap compensation method, blank compensation apparatus and projector equipment,
To solve to cause the problem of focus adjustment accuracy is low because there is gap between drive device and ray machine.
To achieve the above object, the embodiment of the present invention is adopted the following technical scheme that：
A kind of gap compensation method, including：
Control drive device rotates to drive ray machine to carry out focus operations successively；
The definition of the corresponding projected picture of each focal length is obtained to obtain multiple definition, and each definition is compared
Obtain best sharpness；
If the definition of the corresponding projected picture of current focus be less than the best sharpness, calculate the ray machine from
The drive device needs to rotate the first of step-length when current focus is adjusted to the focal length of the best sharpness correspondence projected picture
Quantity；
The drive device is controlled according to the second quantity step-length is rotated with current operation direction in opposite direction to drive
The ray machine carries out reverse focus operations, and second quantity is more than first quantity；
The drive device is controlled to rotate second quantity and described the according to current operation direction in opposite direction
The difference step-length of one quantity is to drive the focal length of the ray machine to be adjusted to the focal length of best sharpness correspondence projected picture.
In the embodiment of the present invention is preferably selected, in above-mentioned gap compensation method, turn in the control drive device
It is dynamic so that before driving the step of ray machine carries out focus operations successively, methods described also includes：Control drive device rotates to drive
Focal length is adjusted to maximum focal length or minimum focus by ray machine.
In the embodiment of the present invention is preferably selected, in above-mentioned gap compensation method, control drive device rotate with
When focal length is adjusted to maximum focal length by driving ray machine, the control drive device rotates to drive ray machine to carry out focus operations successively
Step includes：Control drive device rotates to drive ray machine to carry out focus operations successively from maximum focal length to minimum focus；
When controlling drive device to rotate to drive ray machine that focal length is adjusted into minimum focus, the control drive device is rotated
To include the step of driving ray machine to carry out focus operations successively：Control drive device rotates to drive ray machine from minimum focus to most
Big focal length carries out focus operations successively.
In the embodiment of the present invention is preferably selected, in above-mentioned gap compensation method, control drive device rotate with
When focal length is adjusted to maximum focal length by driving ray machine, the control drive device rotates to drive ray machine to carry out focus operations successively
Step includes：Control drive device is rotated to drive ray machine to carry out focus operations successively along the direction close to minimum focus, and
When the definition of the corresponding projected picture of current focus is less than the definition of the corresponding projected picture of adjacent top n focal length, stop
Focus operations；
When controlling drive device to rotate to drive the ray machine that focal length is adjusted into minimum focus, the control drive device
Rotate to include the step of driving ray machine to carry out focus operations successively：Control drive device rotates to drive ray machine along close to maximum
The direction of focal length carries out focus operations successively, and is less than adjacent top n Jiao in the definition of the corresponding projected picture of current focus
During definition away from corresponding projected picture, stop focus operations.
In the embodiment of the present invention is preferably selected, in above-mentioned gap compensation method, each focal length of acquisition is corresponding
The step of definition of projected picture, includes：
The corresponding projection of current focus is obtained before the drive device drives the ray machine to carry out focus operations next time
Picture, and calculate the definition of the projected picture；
The drive device is controlled to drive the ray machine to carry out focus operations next time.
The embodiment of the present invention additionally provides a kind of blank compensation apparatus, including：
Focus operations control module, for controlling drive device to rotate to drive ray machine to carry out focus operations successively；
Definition acquisition module, the definition for obtaining the corresponding projected picture of each focal length obtains multiple definition, and
Each definition is compared and obtains best sharpness；
Number of steps computing module, it is described optimal clear for being less than in the definition of the corresponding projected picture of current focus
When spending, then calculate the ray machine and be adjusted to the driving when best sharpness corresponds to the focal length of projected picture from current focus
Device needs to rotate the first quantity of step-length；
First reverse focusing control module, for controlling the drive device according to the direction in opposite direction with current operation
The second quantity step-length is rotated to drive the ray machine to carry out reverse focus operations, second quantity is more than the described first number
Amount；
Second reverse focusing control module, for controlling the drive device according to the direction in opposite direction with current operation
It is described optimal clear to drive the focal length of the ray machine to be adjusted to the difference step-length of first quantity to rotate second quantity
The focal length of clear degree correspondence projected picture.
In the embodiment of the present invention is preferably selected, in above-mentioned blank compensation apparatus, the blank compensation apparatus is also wrapped
Include：
Focal length extremum value control module, for controlling drive device to rotate to drive ray machine that focal length is adjusted into maximum focal length or most
Small focal length.
In the embodiment of the present invention is preferably selected, in above-mentioned blank compensation apparatus, the focus operations control module
Including：
First focus operations control submodule, for being rotated in focal length extremum value control module control drive device to drive
When focal length is adjusted to maximum focal length by dynamic ray machine, control drive device rotate with drive ray machine from maximum focal length to minimum focus successively
Carry out focus operations；
Second focus operations control submodule, for being rotated in focal length extremum value control module control drive device to drive
When focal length is adjusted to minimum focus by dynamic ray machine, control drive device rotate with drive ray machine from minimum focus to maximum focal length successively
Carry out focus operations.
In the embodiment of the present invention is preferably selected, in above-mentioned blank compensation apparatus, the focus operations control module
Also include：
3rd focus operations control submodule, for being rotated in focal length extremum value control module control drive device to drive
When focal length is adjusted to maximum focal length by dynamic ray machine, control drive device rotates to drive direction of the ray machine along close minimum focus successively
Focus operations are carried out, and are less than the corresponding shadowgraph of adjacent top n focal length in the definition of the corresponding projected picture of current focus
During the definition in face, stop focus operations；
4th focus operations control submodule, for being rotated in focal length extremum value control module control drive device to drive
When focal length is adjusted to minimum focus by dynamic ray machine, control drive device rotates to drive direction of the ray machine along close maximum focal length successively
Focus operations are carried out, and are less than the corresponding shadowgraph of adjacent top n focal length in the definition of the corresponding projected picture of current focus
During the definition in face, stop focus operations.
The embodiment of the present invention also provides a kind of projector equipment, including processor, drive device and ray machine, wherein, the place
Reason device includes processing unit, memory cell and is stored in memory cell and the program that can be run on a processing unit, the place
Reason unit realizes following steps when performing described program：
The drive device is controlled to rotate to drive the ray machine to carry out focus operations successively；
The definition of the corresponding projected picture of each focal length is obtained to obtain multiple definition, and each definition is compared
Obtain best sharpness；
If the definition of the corresponding projected picture of current focus be less than the best sharpness, calculate the ray machine from
The drive device needs to rotate the first of step-length when current focus is adjusted to the focal length of the best sharpness correspondence projected picture
Quantity；
The drive device is controlled according to the second quantity step-length is rotated with current operation direction in opposite direction to drive
The ray machine carries out reverse focus operations, and second quantity is more than first quantity；
The drive device is controlled to rotate second quantity and described the according to current operation direction in opposite direction
The difference step-length of one quantity is to drive the focal length of the ray machine to be adjusted to the focal length of best sharpness correspondence projected picture.
Gap compensation method, blank compensation apparatus and projector equipment that the present invention is provided, by controlling drive device to carry out
The rotating operation in the direction in opposite direction with current operation twice, is formed because rotation direction twice mutually instead results in rotate twice
Gap cancel out each other, and then solve cause focus adjustment accuracy is low to ask because there is gap between drive device and ray machine
Topic, drastically increases the practicality and reliability of gap compensation method, blank compensation apparatus and projector equipment.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
Fig. 1 is the structured flowchart of processor provided in an embodiment of the present invention.
Fig. 2 is the schematic flow sheet of gap compensation method provided in an embodiment of the present invention.
Fig. 3 is the structured flowchart of blank compensation apparatus provided in an embodiment of the present invention.
Fig. 4 is the structured flowchart of focus operations control module provided in an embodiment of the present invention.
Fig. 5 is another structured flowchart of focus operations control module provided in an embodiment of the present invention.
Icon：10- processors；20- processing units；30- memory cell；100- blank compensation apparatus；110- focus operations
Control module；112- the first focus operations control submodules；114- the second focus operations control submodules；The focusing behaviour of 116- the 3rd
Make control submodule；The focus operations control submodules of 118- the 4th；130- definition acquisition modules；150- number of steps calculates mould
Block；The reverse focusing control modules of 170- first；The reverse focusing control modules of 190- second.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment only
It is a part of embodiment of the present invention, rather than whole embodiments.The present invention being generally described and illustrated herein in the accompanying drawings
The component of embodiment can be arranged and designed with a variety of configurations.
Therefore, the detailed description of embodiments of the invention below to providing in the accompanying drawings is not intended to limit claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model that the present invention is protected
Enclose.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it further need not be defined and explained in subsequent accompanying drawing.In description of the invention
In, term " first ", " second ", " the 3rd ", " the 4th " etc. are only used for distinguishing description, and it is not intended that being or implying relative
Importance.
In the description of the invention, unless otherwise clearly defined and limited, term " setting ", " connected ", " connection " are answered
It is interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected to by intermediary, can be in two elements
The connection in portion.For the ordinary skill in the art, the tool of above-mentioned term in the present invention can be understood with concrete condition
Body implication.
As shown in figure 1, the embodiment of the present invention provides a kind of projector equipment, including processor 10, drive device and ray machine.Its
In, the processor 10 includes processing unit 20, memory cell 30 and is stored in the memory cell 30 and can be at the place
The program run on reason unit 20.
In the present embodiment, following steps can be realized when the processing unit 20 performs the program：The control driving
Device rotates to drive the ray machine to carry out focus operations successively；The definition of the corresponding projected picture of each focal length is obtained to obtain
Multiple definition, and each definition is compared obtains best sharpness；If the corresponding projected picture of current focus is clear
Degree is less than the best sharpness, then calculates the ray machine and be adjusted to the best sharpness correspondence projected picture from current focus
Focal length when the drive device need rotate step-length the first quantity；Control the drive device according to current operation direction
Opposite direction rotates the second quantity step-length to drive the ray machine to carry out reverse focus operations, and second quantity is more than institute
State the first quantity；Control the drive device according to current operation direction in opposite direction rotate second quantity with it is described
The difference step-length of first quantity is to drive the focal length of the ray machine to be adjusted to the focal length of best sharpness correspondence projected picture.
Further, in the present embodiment, the processing unit 20 and memory cell 30 be each other directly or indirectly
It is electrically connected with, to realize the transmission or interaction of data.For example, these elements can pass through one or more communication bus each other
Or signal wire is realized and is electrically connected with.Wherein, it is stored with the form of software or firmware (firmware) and stores in memory cell 30
Software function module in the memory cell 30, the processing unit 20 is stored in soft in memory cell 30 by operation
Blank compensation apparatus 100 in part program and module, such as embodiment of the present invention, so as to perform various function application and data
Processing, that is, realize the gap compensation method in the embodiment of the present invention.
Wherein, the processing unit 20 is probably a kind of IC chip, the disposal ability with signal.Above-mentioned place
Reason unit 20 can be General Porcess Unit, including CPU (Central Processing Unit, CPU), network
Processing unit (Network Processor, NP) etc..It can also be digital signal processing unit (DSP), application specific integrated circuit
(ASIC), field programmable gate array (FPGA) or other PLDs, discrete gate or transistor logic,
Discrete hardware components.It can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.
The memory cell 30 may be, but not limited to, Random Access Storage Unit (Random Access Memory,
RAM), read-only memory unit (Read Only Memory, ROM), may be programmed read-only memory unit (Programmable Read-
Only Memory, PROM), erasable read-only memory unit (Erasable Programmable Read-Only Memory,
EPROM), electric erasable read-only memory unit (Electric Erasable Programmable Read-Only Memory,
EEPROM) etc..Wherein, memory cell 30 is used for storage program, and processing unit 20 performs the journey after execute instruction is received
Sequence.Further, the software program and module in said memory cells 30 may also include operating system.It may include various use
Component software and/or driving in management system task (such as memory management, storage device control, power management), and can
Mutually communicated with various hardware or component software, so as to provide the running environment of other software component.
With reference to Fig. 2, the embodiment of the present invention additionally provides a kind of gap compensation method, and the relevant flow of methods described is defined
Method and step can be realized by the processor 10, the idiographic flow shown in Fig. 2 will be described in detail below.In this reality
Apply in example, methods described can include step S110- steps S190.
Step S110, control drive device rotates to drive ray machine to carry out focus operations successively.
In the present embodiment, the processor 10, can be according to the program control prestored when receiving focus operations instruction
Make the drive device to rotate, to drive the shutdown being connected with the output shaft of the drive device to carry out focus operations successively.
Alternatively, the generating mode of the focus operations instruction is unrestricted, can be configured according to the actual requirements, example
Such as, both can be that user generates the focus operations instruction when opening projector equipment or for opening projection
The focus operations instruction is regenerated after equipment when needing to carry out projection operation.
Alternatively, the ray machine carry out successively focus operations concrete mode it is unrestricted, for example, both can be the drive
Dynamic device, which is rotated, often to be rotated multiple step-lengths to carry out a focus operations or often rotate a step-length once to be adjusted
Jiao operation, can also be it is every rotation half of step-length to carry out a focus operations, can according in practical application to focusing accuracy
Requirement with the time is configured.In the present embodiment, the drive device often rotates ray machine focusing described in a step-length once.
Step S130, obtains the definition of the corresponding projected picture of each focal length to obtain multiple definition, and will be each clear
Degree, which is compared, obtains best sharpness.
In the present embodiment, the mode for obtaining the definition of the corresponding projected picture of each focal length is unrestricted, for example, can be with
Dynamic video is formed after first the corresponding projected picture of each focal length is obtained, again to the dynamic video after the completion of this focus operations
In the picture at each moment enter the calculating of line definition.In the present embodiment, closed to ensure that each definition is corresponding with each focal length
System is clear and definite, in order to follow-up operation, includes the step of the definition of the corresponding projected picture of each focal length of acquisition：Described
Drive device drives the ray machine to carry out obtaining the corresponding projected picture of current focus before focus operations next time, and calculates the throwing
The definition of shadow picture；The drive device is controlled to drive the ray machine to carry out focus operations next time.
Step S150, if the definition of the corresponding projected picture of current focus is less than the best sharpness, is calculated
The drive device needs to rotate when the ray machine is adjusted to the focal length of the best sharpness correspondence projected picture from current focus
First quantity of step-length.
In the present embodiment, after the processor 10 obtains the best sharpness, by the corresponding projection of current focus
The definition of picture is contrasted with the best sharpness, if the definition of the corresponding projected picture of current focus with it is described most
Good definition, then current focus is pinpointed focus, without carrying out next operation.But, it is contemplated that there is current focus corresponding
The probability of the definition of the projected picture situation equal with the best sharpness is extremely low, the processor 10 obtain it is described most
After good definition, focus operations can be further carried out by performing step S150.
Step S170, controls the drive device to rotate the second quantity step according to current operation direction in opposite direction
Length is to drive the ray machine to carry out reverse focus operations, and second quantity is more than first quantity.
Step S190, controls the drive device to rotate second quantity according to current operation direction in opposite direction
With the difference step-length of first quantity to drive the focal length of the ray machine to be adjusted to the corresponding projected picture of the best sharpness
Focal length.
Because the ray machine is during focusing, the definition of projected picture will not be always because of the increase or reduction of focal length
And increase, i.e., from maximum focal length to minimum focus or minimum focus to the regulation of maximum focal length during, corresponding projected picture
Definition can first increase and reduce again, therefore, obtained to ensure that the processor 10 performs step S130 from multiple definition
To best sharpness be all focal lengths of the ray machine in corresponding projected picture best sharpness, in the present embodiment, institute
Processor 10 is stated before step S110 is performed, following steps are can also carry out：Control drive device rotates to drive ray machine will
Focal length is adjusted to maximum focal length or minimum focus.Different according to the content of the step, step S110 can include different sub-steps.
For example, when controlling drive device to rotate to drive ray machine that focal length is adjusted into maximum focal length, step S110 can include following son
Step：Control drive device rotates to drive ray machine to carry out focus operations successively from maximum focal length to minimum focus.Driven in control
Dynamic device is rotated so that when driving the ray machine focal length is adjusted into minimum focus, step S110 can include following sub-step：Control driving
Device rotates to drive ray machine to carry out focus operations successively from minimum focus to maximum focal length.
Further, for avoid driving the ray machine adjusted from minimum focus to maximum focal length or from maximum focal length adjust to
Minimum focus because regulation process is longer cause entirely to focus overlong time and the wasting of resources the problem of, in the present embodiment,
Control drive device is rotated so that when driving the ray machine focal length is adjusted into maximum focal length, step S110 can include following sub-step：Control
Drive device processed is rotated to drive ray machine to carry out focus operations successively along the direction close to minimum focus, and in current focus correspondence
Projected picture definition be less than the corresponding projected picture of adjacent top n focal length definition when, stop focus operations.In control
Drive device processed is rotated so that when driving the ray machine focal length is adjusted into minimum focus, step S110 can include following sub-step：
Control drive device is rotated to drive ray machine to carry out focus operations successively along the direction close to maximum focal length, and in current focus pair
When the definition for the projected picture answered is less than the definition of the corresponding projected picture of adjacent top n focal length, stop focus operations.
Alternatively, the particular number of the adjacent top n focal length is unrestricted, for example, it may be one, two, three
Or other quantity, specific requirement that can be according to the definition to the projector equipment or the corresponding shadowgraph of two neighboring focal length
The difference of the definition in face is configured.
With reference to Fig. 3, the embodiment of the present invention also provides a kind of blank compensation apparatus 100, including focus operations control module
110th, reversely focusing control module 170 and second is reverse for definition acquisition module 130, number of steps computing module 150, first
Focusing control module 190.
The focus operations control module 110, for controlling drive device to rotate to drive ray machine to carry out focusing behaviour successively
Make.In the present embodiment, Fig. 2 step S120 can be performed by the focus operations control module 110.
The definition acquisition module 130, the definition for obtaining the corresponding projected picture of each focal length obtains multiple clear
Clear degree, and each definition is compared obtains best sharpness.In the present embodiment, Fig. 2 step S130 can be by described
Definition acquisition module 130 is performed.
The number of steps computing module 150, it is described for being less than in the definition of the corresponding projected picture of current focus
During best sharpness, then calculate the ray machine from current focus be adjusted to the focal length of the best sharpness correspondence projected picture when
The drive device needs to rotate the first quantity of step-length.In the present embodiment, Fig. 2 step S150 can be by the step-length number
Amount computing module 150 is performed.
Described first reversely focusing control module 170, for control the drive device according to current operation direction phase
Anti- direction rotates the second quantity step-length to drive the ray machine to carry out reverse focus operations, and second quantity is more than described
First quantity.In the present embodiment, Fig. 2 step S170 can be performed by the described first reverse focusing control module 170.
Described second reversely focusing control module 190, for control the drive device according to current operation direction phase
Anti- direction rotates second quantity with the difference step-length of first quantity to drive the focal length of the ray machine to be adjusted to institute
State the focal length of best sharpness correspondence projected picture.In the present embodiment, Fig. 2 step S190 can reversely be adjusted by described second
Burnt control module 190 is performed.
Further, in the present embodiment, the blank compensation apparatus 100 can also include focal length extremum value control module.
The focal length extremum value control module, for controlling the drive device to rotate to drive the ray machine that focal length is adjusted into maximum focal length
Or minimum focus.
It is in the present embodiment, different according to the specific regulative mode of the focal length extremum value control module with reference to Fig. 4, it is described
Focus operations control module 110 can include the first focus operations control submodule 112 and the second focus operations control submodule
114, to perform different focus operations.
The first focus operations control submodule 112, for controlling drive device in the focal length extremum value control module
Rotate so that when driving the ray machine focal length is adjusted into maximum focal length, control drive device rotates to drive ray machine from maximum focal length to minimum
Focal length carries out focus operations successively.The second focus operations control submodule 114, in the focal length extremum value control module
Control drive device is rotated so that when driving the ray machine focal length is adjusted into minimum focus, control drive device rotates to drive ray machine from most
Small focal length to maximum focal length carries out focus operations successively.
It is in the present embodiment, different according to the specific regulative mode of the focal length extremum value control module with reference to Fig. 5, and
Stop position in focus operations is different, and the focus operations control module 110 can also include the 3rd focus operations and control son
The focus operations control submodule 118 of module 116 and the 4th, to perform different focus operations.
The 3rd focus operations control submodule 116, for controlling drive device in the focal length extremum value control module
Rotate so that when driving the ray machine focal length is adjusted into maximum focal length, control drive device rotates to drive ray machine along close to minimum focus
Direction carries out focus operations successively, and corresponding less than adjacent top n focal length in the definition of the corresponding projected picture of current focus
Projected picture definition when, stop focus operations.The 4th focus operations control submodule 118, in Jiao
When being rotated away from extremum value control module control drive device to drive the ray machine focal length is adjusted into minimum focus, control drive device is rotated
To drive ray machine to carry out focus operations successively along the direction close to maximum focal length, and in the clear of the corresponding projected picture of current focus
When clear degree is less than the definition of the corresponding projected picture of adjacent top n focal length, stop focus operations.
In summary, the present invention is provided a kind of gap compensation method, blank compensation apparatus 100 and projector equipment, pass through
Drive device is controlled to carry out the rotating operation in direction in opposite direction with current operation twice, due to rotation direction twice mutually on the contrary
Cause the gap for rotating formation twice to be cancelled out each other, and then solve to cause focal length because there is gap between drive device and ray machine
The problem of accuracy is low is adjusted, the practicality of gap compensation method, blank compensation apparatus 100 and projector equipment is drastically increased
And reliability.
In the embodiment that the embodiment of the present invention is provided, it should be understood that disclosed apparatus and method, it can also lead to
Other modes are crossed to realize.Apparatus and method embodiment described above is only schematical, for example, the flow in accompanying drawing
Figure and block diagram show the body in the cards of the device of multiple embodiments according to the present invention, method and computer program product
System structure, function and operation.At this point, each square frame in flow chart or block diagram can represent a module, program segment or
A part for code a, part for the module, program segment or code is used to realize defined logic work(comprising one or more
The executable instruction of energy.It should also be noted that in some implementations as replacement, the function of being marked in square frame can also
To occur different from the order marked in accompanying drawing.For example, two continuous square frames can essentially be performed substantially in parallel, it
Can also perform in the opposite order sometimes, this is depending on involved function.It is also noted that block diagram and/or flow
The combination of each square frame in figure and the square frame in block diagram and/or flow chart, can use function or action as defined in performing
Special hardware based system is realized, or can be realized with the combination of specialized hardware and computer instruction.
In addition, each functional module in each embodiment of the invention can integrate to form an independent portion
Point or modules individualism, can also two or more modules be integrated to form an independent part.
If the function is realized using in the form of software function module and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Understood based on such, technical scheme is substantially in other words
The part contributed to prior art or the part of the technical scheme can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are to cause a computer equipment (can be individual
People's computer, electronic equipment, or network equipment etc.) perform all or part of step of each of the invention embodiment methods described
Suddenly.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), deposit at random
Access to memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to the bag of nonexcludability
Contain, so that process, method, article or equipment including a series of key elements are not only including those key elements, but also including
Other key elements being not expressly set out, or also include for this process, method, article or the intrinsic key element of equipment.
In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including the key element
Process, method, article or equipment in also there is other identical element.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of gap compensation method, it is characterised in that methods described includes：
Control drive device rotates to drive ray machine to carry out focus operations successively；
The definition of the corresponding projected picture of each focal length is obtained to obtain multiple definition, and each definition is compared to obtain
Best sharpness；
If the definition of the corresponding projected picture of current focus is less than the best sharpness, the ray machine is calculated from current
The drive device needs to rotate the first quantity of step-length when focal length is adjusted to the focal length of the best sharpness correspondence projected picture；
Control the drive device described to drive according to the second quantity step-length is rotated with current operation direction in opposite direction
Ray machine carries out reverse focus operations, and second quantity is more than first quantity；
The drive device is controlled to rotate second quantity and the described first number according to current operation direction in opposite direction
The difference step-length of amount is to drive the focal length of the ray machine to be adjusted to the focal length of best sharpness correspondence projected picture.
2. gap compensation method according to claim 1, it is characterised in that rotated in the control drive device to drive
Before the step of ray machine carries out focus operations successively, methods described also includes：Control drive device rotates to drive ray machine by Jiao
Away from being adjusted to maximum focal length or minimum focus.
3. gap compensation method according to claim 2, it is characterised in that rotated in control drive device to drive ray machine
When focal length is adjusted into maximum focal length, the control drive device rotates to drive the step of ray machine carries out focus operations successively bag
Include：Control drive device rotates to drive ray machine to carry out focus operations successively from maximum focal length to minimum focus；
When controlling drive device to rotate to drive ray machine that focal length is adjusted into minimum focus, the control drive device rotates to drive
The step of dynamic ray machine carries out focus operations successively includes：Control drive device rotates to drive ray machine from minimum focus to maximum Jiao
Away from carrying out focus operations successively.
4. gap compensation method according to claim 2, it is characterised in that rotated in control drive device to drive ray machine
When focal length is adjusted into maximum focal length, the control drive device rotates to drive the step of ray machine carries out focus operations successively bag
Include：Control drive device is rotated to drive ray machine to carry out focus operations successively along the direction close to minimum focus, and current burnt
When definition away from corresponding projected picture is less than the definition of the corresponding projected picture of adjacent top n focal length, stop focusing behaviour
Make；
When controlling drive device to rotate to drive the ray machine that focal length is adjusted into minimum focus, the control drive device is rotated
To include the step of driving ray machine to carry out focus operations successively：Control drive device rotates to drive ray machine along close to maximum focal length
Direction carry out focus operations successively, and be less than adjacent top n focal length pair in the definition of the corresponding projected picture of current focus
During the definition for the projected picture answered, stop focus operations.
5. the gap compensation method according to claim 1-4 any one, it is characterised in that each focal length correspondence of acquisition
Projected picture definition the step of include：
The corresponding projected picture of current focus is obtained before the drive device drives the ray machine to carry out focus operations next time,
And calculate the definition of the projected picture；
The drive device is controlled to drive the ray machine to carry out focus operations next time.
6. a kind of blank compensation apparatus, it is characterised in that including：
Focus operations control module, for controlling drive device to rotate to drive ray machine to carry out focus operations successively；
Definition acquisition module, the definition for obtaining the corresponding projected picture of each focal length obtains multiple definition, and will be each
Definition, which is compared, obtains best sharpness；
Number of steps computing module, is less than the best sharpness for the definition in the corresponding projected picture of current focus
When, then calculate the ray machine and be adjusted to the driving dress when best sharpness corresponds to the focal length of projected picture from current focus
Put the first quantity for needing to rotate step-length；
First reverse focusing control module, for controlling the drive device to be rotated according to current operation direction in opposite direction
Second quantity step-length is to drive the ray machine to carry out reverse focus operations, and second quantity is more than first quantity；
Second reverse focusing control module, for controlling the drive device to be rotated according to current operation direction in opposite direction
The difference step-length of second quantity and first quantity is to drive the focal length of the ray machine to be adjusted to the best sharpness
The focal length of correspondence projected picture.
7. blank compensation apparatus according to claim 6, it is characterised in that the blank compensation apparatus also includes：
Focal length extremum value control module, for controlling drive device to rotate, to drive, focal length is adjusted to maximum focal length by ray machine or minimum is burnt
Away from.
8. blank compensation apparatus according to claim 7, it is characterised in that the focus operations control module includes：
First focus operations control submodule, for being rotated in focal length extremum value control module control drive device to drive light
When focal length is adjusted to maximum focal length by machine, control drive device rotates to drive ray machine to carry out successively from maximum focal length to minimum focus
Focus operations；
Second focus operations control submodule, for being rotated in focal length extremum value control module control drive device to drive light
When focal length is adjusted to minimum focus by machine, control drive device rotates to drive ray machine to carry out successively from minimum focus to maximum focal length
Focus operations.
9. blank compensation apparatus according to claim 7, it is characterised in that the focus operations control module also includes：
3rd focus operations control submodule, for being rotated in focal length extremum value control module control drive device to drive light
When focal length is adjusted to maximum focal length by machine, control drive device rotates to drive ray machine to carry out successively along the direction close to minimum focus
Focus operations, and it is less than the corresponding projected picture of adjacent top n focal length in the definition of the corresponding projected picture of current focus
During definition, stop focus operations；
4th focus operations control submodule, for being rotated in focal length extremum value control module control drive device to drive light
When focal length is adjusted to minimum focus by machine, control drive device rotates to drive ray machine to carry out successively along the direction close to maximum focal length
Focus operations, and it is less than the corresponding projected picture of adjacent top n focal length in the definition of the corresponding projected picture of current focus
During definition, stop focus operations.
10. a kind of projector equipment, it is characterised in that including processor, drive device and ray machine, wherein, the processor includes
Processing unit, memory cell and memory cell and the program that can be run on a processing unit are stored in, the processing unit is held
Following steps are realized during row described program：
The drive device is controlled to rotate to drive the ray machine to carry out focus operations successively；
The definition of the corresponding projected picture of each focal length is obtained to obtain multiple definition, and each definition is compared to obtain
Best sharpness；
If the definition of the corresponding projected picture of current focus is less than the best sharpness, the ray machine is calculated from current
The drive device needs to rotate the first quantity of step-length when focal length is adjusted to the focal length of the best sharpness correspondence projected picture；
Control the drive device described to drive according to the second quantity step-length is rotated with current operation direction in opposite direction
Ray machine carries out reverse focus operations, and second quantity is more than first quantity；
The drive device is controlled to rotate second quantity and the described first number according to current operation direction in opposite direction
The difference step-length of amount is to drive the focal length of the ray machine to be adjusted to the focal length of best sharpness correspondence projected picture.
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| CN201710699917.9A CN107277477A (en) | 2017-08-16 | 2017-08-16 | Gap compensation method, blank compensation apparatus and projector equipment |
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| WO2022012341A1 (en) * | 2020-07-13 | 2022-01-20 | 深圳光峰科技股份有限公司 | Projection device, and automatic focusing method and apparatus therefor |
| CN115242965A (en) * | 2022-05-06 | 2022-10-25 | 福建星网智慧软件有限公司 | Automatic focusing method, device, equipment and medium for variable step length of camera |
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