CN104536249B - The method and apparatus of regulation projector focal length - Google Patents
The method and apparatus of regulation projector focal length Download PDFInfo
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- CN104536249B CN104536249B CN201510023687.5A CN201510023687A CN104536249B CN 104536249 B CN104536249 B CN 104536249B CN 201510023687 A CN201510023687 A CN 201510023687A CN 104536249 B CN104536249 B CN 104536249B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/53—Means for automatic focusing, e.g. to compensate thermal effects
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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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- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a kind of method and apparatus regulating projector focal length, described method includes step: obtain current projector distance, or obtain Current projection apart under at least two group focal length definition respective value；According to described current projector distance or focal length definition respective value, the focal length from the multiple projector distances prestored, with the corresponding relation of definition, selects the corresponding relation of focal length and the definition mated most with Current projection distance；Corresponding relation according to the described focal length that distance is mated most with Current projection with definition, it is thus achieved that Current projection is apart from the pinpointed focus corresponding to lower utmost sharpness；The focal length of regulation projector is to described pinpointed focus, it is thus achieved that projection picture clearly.Thus, it is achieved that being automatically adjusted of projector focal length so that projector is more intelligent and hommization, user, without manually regulation, improves Consumer's Experience, improves efficiency.
Description
Technical field
The present invention relates to porjector technology field, especially relate to a kind of method regulating projector focal length and
Device.
Background technology
Projector is widely used to teaching, office and sphere of life, in particular with mobile terminal
Developing rapidly, a lot of mobile terminals are also equipped with projector, work and life to people bring pole
Big facility and enjoyment.When using projector, in order to make the projection picture of display on projection screen clear,
Needing to regulate the focal length of projector, and typically require user at present and manually regulate, regulation process compares
Loaded down with trivial details time-consuming.For mobile terminal, when using, projector distance is the most different every time, and different
Pinpointed focus corresponding to projector distance different, therefore user to use projector to experience loaded down with trivial details every time
Focus adjustment process, wastes time and energy, and Consumer's Experience is the best.
Summary of the invention
Present invention is primarily targeted at a kind of method and apparatus regulating projector focal length of offer, it is intended to real
Being automatically adjusted of existing projector focal length, improves efficiency, promotes Consumer's Experience.
To achieve these objectives, the present invention proposes a kind of method regulating projector focal length, including step:
Obtain current projector distance, or obtain Current projection apart under at least two group focal lengths-definition
Respective value；
According to described current projector distance or focal length-definition respective value, from the multiple projections prestored away from
In the corresponding relation of the focal length under from and definition, select the focal length mated most with Current projection distance with clear
The corresponding relation of clear degree；
Corresponding relation according to the described focal length that distance is mated most with Current projection with definition, it is thus achieved that current
Pinpointed focus corresponding to utmost sharpness under projector distance；
The focal length of regulation projector is to described pinpointed focus.
Preferably, described acquisition Current projection apart under at least two group focal lengths-definition respective value include:
Project under Current projection distance；
Acquired projections image, it is thus achieved that the definition of described projection picture and current focal length, obtains one group of Jiao
Away from-definition respective value；
It is automatically adjusted focal length, repeats previous step, obtain another group focal length-definition respective value, finally obtain
Take at least two group focal lengths-definition respective value.
Preferably, described focal length with the corresponding relation of definition is: the function expression of focal length and definition,
Function curve diagram or corresponding form.
Preferably, described focal length and the function curve diagram that corresponding relation is focal length and definition of definition；
Described according to described focal length-definition respective value, the focal length from the multiple projector distances prestored and definition
Corresponding relation in, select the corresponding relation of focal length and the definition mated most with Current projection distance, bag
Include:
Using described focal length-definition respective value as coordinate figure, and by the coordinate points corresponding to described coordinate figure
In the coordinate system at the function curve diagram place being marked on described focal length and definition；
The letter the highest with described coordinate points registration is selected from the described focal length function curve diagram with definition
Number curve figure, as the function curve diagram of the focal length mated most with Current projection distance with definition.
Preferably, close with the corresponding of definition with the focal length that Current projection distance is mated most described in described basis
System, it is thus achieved that Current projection apart from the pinpointed focus corresponding to lower utmost sharpness, including:
Obtain the summit of the function curve diagram of the described focal length mated most with Current projection distance and definition
Coordinate figure, using the vertical coordinate in described coordinate figure as Current projection apart under utmost sharpness, by institute
State the abscissa in coordinate figure as Current projection apart from the pinpointed focus corresponding to lower utmost sharpness.
The present invention proposes a kind of device regulating projector focal length simultaneously, including acquisition module, processing module
And adjustment module, wherein:
Acquisition module, for obtaining current projector distance, or obtain Current projection apart under at least
Two groups of focal length-definition respective value；
Processing module, for according to described Current projection distance or focal length-definition respective value, from prestoring
Multiple projector distances under focal length and definition corresponding relation in, select with Current projection distance
The focal length joined and the corresponding relation of definition；According to the described focal length that distance is mated most with Current projection with clear
The corresponding relation of clear degree, it is thus achieved that Current projection is apart from the pinpointed focus corresponding to lower utmost sharpness；
Adjustment module, for regulating the focal length of projector to described pinpointed focus.
Preferably, described acquisition module is used for: gather Current projection apart under projection picture, it is thus achieved that institute
State the definition of projection picture and current focal length, obtain one group of focal length-definition respective value；Control described
Adjustment module is automatically adjusted focal length, obtains another group focal length-definition respective value, final acquisition at least two groups
Focal length-definition respective value.
Preferably, described focal length with the corresponding relation of definition is: the function expression of focal length and definition,
Function curve diagram or corresponding form.
Preferably, described focal length and the function curve diagram that corresponding relation is focal length and definition of definition,
Described processing module is used for: using described focal length-definition respective value as coordinate figure, and by described coordinate figure
In the coordinate system at the function curve diagram place that corresponding coordinate points is marked on described focal length and definition；From
Described focal length selects the function curve the highest with described coordinate points registration in the function curve diagram of definition
Figure, as the function curve diagram of the focal length mated most with Current projection distance with definition.
Preferably, described processing module is used for: obtain the described focal length mated most with Current projection distance and
The coordinate figure on the summit of the function curve diagram of definition, throws the vertical coordinate in described coordinate figure as current
Shadow apart under utmost sharpness, using the abscissa in described coordinate figure as Current projection apart from lower maximum
Pinpointed focus corresponding to definition.
A kind of method regulating projector focal length provided by the present invention, by prestoring under multiple projector distance
The corresponding relation of focal length and definition, after projector starts, first obtain current projector distance or
Obtain Current projection apart under at least two group focal lengths-definition respective value, then select from corresponding relation
The corresponding relation of the focal length mated most with Current projection distance and definition, and then obtain Current projection distance
Pinpointed focus corresponding to lower utmost sharpness, is finally automatically adjusted focal length to pinpointed focus, it is thus achieved that clear
Projection picture.Achieve being automatically adjusted of projector focal length so that projector is more intelligent and human nature
Changing, user, without manually regulation, improves Consumer's Experience, improves efficiency.
Accompanying drawing explanation
Fig. 1 is the flow chart that the present invention regulates the method first embodiment of projector focal length；
Fig. 2 is the function curve diagram of the focal length under a certain projector distance and definition；
Fig. 3 is the function curve diagram of the focal length under certain two projector distance and definition；
Fig. 4 is the letter choosing focal length and the definition mated most with Current projection distance in the embodiment of the present invention
The schematic diagram of number curve figure；
Fig. 5 is the flow chart that the present invention regulates method second embodiment of projector focal length；
Fig. 6 is the flow chart that the present invention regulates the device first embodiment of projector focal length.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, do referring to the drawings further
Explanation.
Detailed description of the invention
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to limit
Determine the present invention.
Seeing Fig. 1, propose the present invention and regulate the method first embodiment of projector focal length, described method includes
Following steps:
Step S10: obtain at least two group focal lengths-definition respective value under Current projection distance
Concrete, projector (can be the projector module in special projection device or mobile terminal)
After startup, first project, automatically to carry out focal length rectification under Current projection distance.Acquired projections
Projection picture on screen, it is thus achieved that the definition of this projection picture, and obtain current focal length, obtain
One group of focal length-definition respective value；It is automatically adjusted focal length, again projects, before repetition with the focal length after regulation
One step, obtains another group focal length-definition respective value in an identical manner, by that analogy, can obtain
Organize focal length-definition respective value more, minimum be no less than two groups, the most The more the better.Described focal length-clear
Degree respective value includes focal length value and the definition values corresponding with this focal length value.The definition of projection picture
Can be calculated by definition algorithm of the prior art and obtain, be not repeated herein.
Step S11: according to the focal length-definition respective value obtained, from the multiple projector distances prestored
In the corresponding relation of focal length and definition, select the focal length and definition mated most with Current projection distance
Corresponding relation
Focal length under the multiple projector distances prestored and the corresponding relation of definition, can be stored in this locality,
Being stored in high in the clouds, in theory, the corresponding relation of storage is The more the better.Under multiple projector distances
Focal length and the corresponding relation of definition, can be the corresponding focal length of a projector distance value and definition
Corresponding relation, it is also possible to be the corresponding relation of the corresponding focal length of a projector distance scope and definition.
The corresponding relation of described focal length and definition include focal length and the function expression of definition, function curve diagram,
Corresponding form etc..
It is described in detail as a example by function curve diagram below.
When projector carries out screen prjection, regulating projector focal length, projection picture can be fuzzy and clear
Between convert.When being gradually adjusted to long-focus from short focus or being gradually adjusted to short focus from long-focus,
Projection picture by experience from obscuring clearly, again from clear to fuzzy change procedure, this change procedure
Can represent with the function curve in Fig. 2.Wherein, in Fig. 2, transverse axis represents the focal length of projector, vertical
Axle represents the definition of projection picture, and function curve represents under certain projector distance, regulates projector
Focal length, the definition situation of change of projection picture.In figure it can be seen that the definition of projection picture with
The change the change of projector focal length and occur, hump represents that the definition of projection picture reaches
Height, the abscissa value that this point is corresponding represents the Current projection pinpointed focus apart from lower projector.
But, when same projector projects under different projector distances, optimal Jiao of its correspondence
Away from difference.As shown in Figure 3, it is shown that two focal lengths corresponding under two projector distances and the letter of definition
Number curve figure.So, for same projector, can measure definition under multiple projector distance with
The function curve diagram of focal length, thus form the corresponding relation data base of a focal length and definition.In order to make
The definition obtained is enough accurate, and projector can be allowed to use same piece image to measure all the time, than
As used the LOGO image of producer, another benefit of do so is to start display LOGO at projector
During, focal length is adjusted the most automatically.It practice, projector have the projection oneself supported away from
From scope, when measuring relation curve in advance, it is only necessary to measure its projector distance scope supported,
So can reduce the workload of measurement.The present embodiment has i.e. prestored the projector distance that the machine is supported
In the range of, the focal length under multiple projector distances and the function curve diagram of definition, form a focal length with clear
The corresponding relation data base of degree, this data base may be located at this locality, it is also possible to is positioned at high in the clouds.
When obtain Current projection apart under focal length-definition respective value after, then by focal length-definition respective value
As coordinate figure, wherein using focal length value as abscissa value, definition values as ordinate value, and should
Coordinate points corresponding to coordinate figure is marked on the coordinate at the function curve diagram place of focal length and the definition prestored
In system.Then, overlap with all coordinate points selected the function curve diagram of definition with labelling from focal length
Spend the highest function curve diagram, bent with the function of definition as the focal length mated most with Current projection distance
Line chart.In other words, which fall into when the coordinate points corresponding to the focal length-definition respective value of all acquisitions
One focal length and the function curve diagram of definition, or bent with the function of definition near which focal length
During line chart, then using this function curve diagram as the letter of the focal length mated most with Current projection distance with definition
Number curve figure.
Such as, as shown in Figure 4, the focal length prestored includes two projections with the function curve diagram of definition
Function curve diagram under apart from, respectively function curve diagram A and B.Obtain three focal length-definitions pair
Should be worth, the most corresponding three coordinate points i, j, k, these three coordinate points entirely falls in function curve diagram A,
Then using function curve diagram A as the function curve of the focal length mated most with Current projection distance with definition
Figure.
In certain embodiments, the corresponding relation of focal length and definition can also be the letter of focal length and definition
Number expression formula, the focal length prestored in data base under multiple projector distance and the function expression of definition,
As this function expression isWherein f (x) represents definition, and x represents focal length, a, b,
C is constant and a > 0, under different projector distances, a, b, c are different.After obtaining focal length-definition respective value,
Focal length value in focal length-definition respective value is substituted into, as f (x), each function prestored as x, definition values
In expression formula, therefrom select both sides equation equal or closest to equal function expression as with currently
The function expression of the focal length that projector distance mates most and definition.Or, obtaining three groups of focal lengths-clear
After degree respective value, respectively three groups of focal lengths-definition respective value is substituted into function expression
In, directly try to achieve a, b, c value, a, b, c value tried to achieve is substituted into function expression
The middle function expression as the focal length mated most with Current projection distance with definition.
In further embodiments, focal length can also be focal length and definition with the corresponding relation of definition
Corresponding form, the corresponding form of the focal length prestored in data base under multiple projector distance and definition, right
Answer the corresponding focal length value (or value range) of each definition values (or value range) in form.Work as acquisition
After focal length-definition respective value, all of focal length-definition respective value form corresponding with each obtained is entered
Row contrast, therefrom selects corresponding form the most corresponding or immediate with all focal lengths-definition respective value and makees
Corresponding form for the focal length that mates most with Current projection distance with definition.
Step S12: according to the corresponding relation of the focal length mated most with Current projection distance with definition, it is thus achieved that
Current projection is apart from the pinpointed focus corresponding to lower utmost sharpness
Concrete, when the corresponding relation of the focal length mated most with Current projection distance with definition be focal length with
During the function curve diagram of definition, obtain the coordinate figure on the summit of this function curve diagram, by apex coordinate value
In vertical coordinate as Current projection apart under utmost sharpness, using the abscissa in coordinate figure as work as
Front projection is apart from the pinpointed focus corresponding to lower utmost sharpness.
When the corresponding relation of the focal length mated most with Current projection distance with definition is focal length and definition
During function expression, with Gaussian functionAs a example by, the apex coordinate of its correspondence be (b,
A), wherein a be Current projection apart under utmost sharpness, b is that Current projection is apart from lower utmost sharpness
Corresponding pinpointed focus.
When the corresponding relation of the focal length mated most with Current projection distance with definition is focal length and definition
During corresponding form, from this form, find out value of maximum articulation, corresponding to this value of maximum articulation
Focal length value as Current projection apart under pinpointed focus.
Should be appreciated that pinpointed focus of the present invention, be a relative concept, and nisi most preferably
Focal length, it is impossible to therefore protection scope of the present invention is limited.
Step S13: the focal length of regulation projector is to pinpointed focus
Thus, the method for the regulation projector focal length of the present embodiment, by prestoring under multiple projector distance
The corresponding relation of focal length and definition, after projector starts, first obtain Current projection apart under extremely
Few two groups of focal length-definition respective value, then obtain and Current projection distance according to respective value and corresponding relation
The corresponding relation of the focal length mated most and definition, and then obtain Current projection apart from lower utmost sharpness institute
Corresponding pinpointed focus, is finally automatically adjusted focal length to pinpointed focus, it is thus achieved that projection picture clearly.Real
Show being automatically adjusted of projector focal length so that projector is more intelligent and hommization, and user is without hands
Dynamic regulation, improves Consumer's Experience, improves efficiency.
Seeing Fig. 5, propose the present invention and regulate method second embodiment of projector focal length, described method includes
Following steps:
Step S20: obtain current projector distance
After projector starts, obtain projector and throwing by distance detection device (such as infrared range-measurement system)
The distance of shadow screen, the projector distance that this distance is the most current.
Step S21: according to current projector distance, the focal length from the multiple projector distances prestored is with clear
In the corresponding relation of degree, select the corresponding relation of focal length and the definition mated most with Current projection distance
Focal length under the multiple projector distances prestored and the corresponding relation of definition, can be stored in this locality,
It is stored in high in the clouds.The corresponding relation of focal length and definition includes the function representation of focal length and definition
Formula, function curve diagram, corresponding form etc..Focal length under multiple projector distances and the corresponding relation of definition,
Can be the corresponding relation of the corresponding focal length of a projector distance value and definition, it is also possible to be a throwing
The corresponding focal length of shadow distance range and the corresponding relation of definition.
Which distance value judging current projector distance value and prestore is equal, or with which distance prestored
Be worth closest, or in which distance range prestored, then by this apart under focal length and definition
Corresponding relation is as the corresponding relation of the focal length mated most with Current projection distance with definition.
Step S22: according to the corresponding relation of the focal length mated most with Current projection distance with definition, it is thus achieved that
Current projection is apart from the pinpointed focus corresponding to lower utmost sharpness
This step S22 is identical with step S12 in first embodiment, does not repeats them here.
Step S23: the focal length of regulation projector is to pinpointed focus
Thus, the method for the regulation projector focal length of the present embodiment, by prestoring under multiple projector distance
Focal length and the corresponding relation of definition, after projector starts, first obtain current projector distance, so
After from corresponding relation, select the focal length and the corresponding relation of definition mated most with Current projection distance, enter
And obtain Current projection apart from the pinpointed focus corresponding to lower utmost sharpness, finally it is automatically adjusted focal length extremely
Pinpointed focus, it is thus achieved that projection picture clearly.Achieve being automatically adjusted of projector focal length so that projection
Instrument is more intelligent and hommization, and user, without manually regulation, improves Consumer's Experience, improves efficiency.
See Fig. 6, propose the present invention and regulate device one embodiment of projector focal length, described regulation projector
The device of focal length can apply to special projection device or there is projecting function mobile terminal in.Described
The device of regulation projector focal length includes acquisition module, processing module and adjustment module.
Acquisition module: for obtain Current projection apart under at least two group focal lengths-definition respective value, and
It is sent to processing module.
Concrete, after projector starts, first project under Current projection distance, acquisition module
Acquired projections is to the projection picture on screen, it is thus achieved that the definition of this projection picture, and obtains current Jiao
Away from, obtain one group of focal length-definition respective value；Then control and regulation module is automatically adjusted focal length, projector
Again projecting with the focal length after regulation, acquisition module obtains another group focal length-definition pair in an identical manner
Should be worth, by that analogy, can obtain and organize focal length-definition respective value more, minimum be no less than two groups.Described
Focal length-definition respective value includes focal length value and the definition values corresponding with this focal length value.
Processing module: for according to Current projection distance or focal length-definition respective value, many from prestoring
In the corresponding relation of the focal length under individual projector distance and definition, select and mate most with Current projection distance
Focal length and the corresponding relation of definition；Then according to the focal length mated most with Current projection distance and definition
Corresponding relation, it is thus achieved that Current projection is apart from the pinpointed focus corresponding to lower utmost sharpness.And will be optimal
Focal length is sent to adjustment module.
Focal length under the multiple projector distances prestored and the corresponding relation of definition, can be stored in this locality,
It is stored in high in the clouds.Focal length under multiple projector distances and the corresponding relation of definition, can be one
The corresponding focal length of individual projector distance value and the corresponding relation of definition, it is also possible to be a projector distance model
Enclose the corresponding relation of a corresponding focal length and definition.
The corresponding relation of focal length and definition include focal length and the function expression of definition, function curve diagram,
Corresponding form etc..
For example, as a example by the corresponding relation of focal length and definition is as function curve diagram.When projector enters
During row screen prjection, regulating projector focal length, projection picture can convert between fuzzy and clear.When from
Short focus is gradually adjusted to long-focus or when long-focus is gradually adjusted to short focus, and projection picture will be through
Go through from obscuring clearly, again from clear to fuzzy change procedure, this change procedure can be with in Fig. 2
Function curve represent.Wherein, in Fig. 2, transverse axis represents the focal length of projector, and the longitudinal axis represents projection
The definition of picture, function curve represents under certain projector distance, the focal length of regulation projector, projection
The definition situation of change of image.It can be seen that the definition of projection picture is along with projector focal length in figure
Change and the change that occurs, hump represents that the definition of projection picture reaches the highest, and this point is right
The abscissa value answered represents the Current projection pinpointed focus apart from lower projector.
But, when same projector projects under different projector distances, optimal Jiao of its correspondence
Away from difference.As shown in Figure 3, it is shown that two focal lengths corresponding under two projector distances and the letter of definition
Number curve figure.So, for same projector, can measure definition under multiple projector distance with
The function curve diagram of focal length, thus form the corresponding relation data base of a focal length and definition.In order to make
The definition obtained is enough accurate, and projector can be allowed to use same piece image to measure all the time, than
As used the LOGO image of producer, another benefit of do so is to start display LOGO at projector
During, focal length is adjusted the most automatically.It practice, projector have the projection oneself supported away from
From scope, when measuring relation curve in advance, it is only necessary to measure its projector distance scope supported,
So can reduce the workload of measurement.Such that it is able to prestore the projector distance scope that projector is supported
In, the focal length under multiple projector distances and the function curve diagram of definition, form a focal length and definition
Corresponding relation data base, this data base may be located at this locality, it is also possible to is positioned at high in the clouds.
When obtain Current projection apart under focal length-definition respective value after, acquisition module is then by focal length-clear
Degree respective value is as coordinate figure, wherein using focal length value as abscissa value, definition values as ordinate value,
And the coordinate points corresponding to this coordinate figure is marked on the function curve diagram place of focal length and the definition prestored
Coordinate system in.Then, from the function curve diagram of focal length and definition, all coordinates with labelling are selected
The point the highest function curve diagram of registration, as the focal length mated most with Current projection distance and definition
Function curve diagram.In other words, processing module is analyzed corresponding to the focal length-definition respective value of all acquisitions
Coordinate points fall into the function curve diagram of which focal length and definition, or near which focal length
With the function curve diagram of definition, then using this function curve diagram as Jiao mated most with Current projection distance
Away from the function curve diagram with definition.
Such as, as shown in Figure 4, the focal length prestored includes two projections with the function curve diagram of definition
Function curve diagram under apart from, respectively function curve diagram A and B.Obtain three focal length-definitions pair
Should be worth, the most corresponding three coordinate points i, j, k, these three coordinate points entirely falls in function curve diagram A,
Processing module then using function curve diagram A as the letter of the focal length mated most with Current projection distance with definition
Number curve figure.
After selecting the focal length mated most with the Current projection distance function curve diagram with definition, processing module
Then obtain the coordinate figure on the summit of this function curve diagram, the vertical coordinate in apex coordinate value is thrown as current
Shadow apart under utmost sharpness, the abscissa in coordinate figure is clear apart from lower maximum as Current projection
Pinpointed focus corresponding to degree.
As a example by the corresponding relation of focal length and definition is for the focal length function expression with definition.Data base
In the function expression of the focal length that prestored under multiple projector distance and definition, as this function expression isWherein f (x) represents definition, and x represents focal length, and a, b, c are constant and a > 0,
Under different projector distances, a, b, c are different.After obtaining focal length-definition respective value, processing module then will
Focal length value in focal length-definition respective value substitutes into, as x, definition values, each function table prestored as f (x)
Reach in formula, therefrom select both sides equation equal or throw as with current closest to equal function expression
The function expression of the focal length that shadow distance is mated most and definition.Or, obtaining three groups of focal length-definitions
After respective value, respectively three groups of focal lengths-definition respective value is substituted into function expressionIn,
Directly try to achieve a, b, c value, a, b, c value tried to achieve is substituted into function expressionIn
Function expression as the focal length mated most with Current projection distance with definition.
After selecting or obtain the focal length mated most with the Current projection distance function expression with definition, place
Reason module then obtains the apex coordinate of the function curve diagram corresponding to this function expression, and this apex coordinate is
(b, a), wherein a be Current projection apart under utmost sharpness, b is that Current projection is apart from lower maximum
Pinpointed focus corresponding to definition.
As a example by focal length and the corresponding relation of definition are for the focal length corresponding form with definition.In data base
The corresponding form of the focal length prestored under multiple projector distance and definition, in corresponding form, each is clear
The corresponding focal length value (or value range) of angle value (or value range).After obtaining focal length-definition respective value,
All of focal length-definition respective value the form corresponding with each obtained is contrasted, therefrom by processing module
Select corresponding form the most corresponding or immediate with all focal lengths-definition respective value as with Current projection
The corresponding form of the focal length that distance is mated most and definition.Select the focal length mated most with Current projection distance
After the corresponding form of definition, processing module then finds out value of maximum articulation from this form, should
Focal length value corresponding to value of maximum articulation as Current projection apart under pinpointed focus.
Adjustment module: for being automatically adjusted the focal length of projector, after receiving pinpointed focus, regulation is thrown
The focal length of shadow instrument is to pinpointed focus.
In certain embodiments, after projector starts, acquisition module passes through distance detection device (as red
Outer diastimeter) obtain the distance of projector and projection screen, the projector distance that this distance is the most current is, and general
Current projector distance is sent to processing module.Processing module then judges current projector distance value and prestores
Which distance value equal or closest with which distance value prestored, or in which distance prestored
In the range of, then using this apart under the corresponding relation of focal length and definition as with Current projection distance
The focal length joined and the corresponding relation of definition.
The device of the regulation projector focal length of the present invention, by the focal length that prestores under multiple projector distance with clear
The corresponding relation of clear degree, after projector starts, first obtains current projector distance or obtains current throwing
Shadow apart under at least two group focal lengths-definition respective value, then select from corresponding relation and Current projection
The corresponding relation of the focal length that distance is mated most and definition, and then it is clear apart from lower maximum to obtain Current projection
Pinpointed focus corresponding to degree, is finally automatically adjusted focal length to pinpointed focus, it is thus achieved that projection picture clearly.
Achieve being automatically adjusted of projector focal length so that projector is more intelligent and hommization, user without
Manually regulation, improves Consumer's Experience, improves efficiency.
It should be understood that the device of the regulation projector focal length of above-described embodiment offer is at regulation projector
During focal length, only it is illustrated with the division of above-mentioned each functional module, in actual application, can basis
Need and above-mentioned functions distribution is completed by different functional modules.It addition, the tune that above-described embodiment provides
The device of joint projector focal length belongs to same design with the embodiment of the method for regulation projector focal length, and it is concrete
The technical characteristic that the process of realization refers in embodiment of the method, and embodiment of the method is the most right in device embodiment
Should be suitable for, repeat no more here.
One of ordinary skill in the art will appreciate that, realize all or part of step in above-described embodiment method
Can be completed by the hardware that program controls to be correlated with, described program can be stored in a computer-readable
Taking in storage medium, described storage medium can be ROM/RAM, disk, CD etc..
It should be appreciated that these are only the preferred embodiments of the present invention, it is impossible to therefore limit the present invention's
The scope of the claims, every equivalent structure utilizing description of the invention and accompanying drawing content to be made or equivalence flow process become
Change, or be directly or indirectly used in other relevant technical fields, be the most in like manner included in the patent of the present invention
In protection domain.
Claims (8)
1. the method regulating projector focal length, it is characterised in that include step:
Obtain Current projection apart under at least two group focal lengths-definition respective value；
According at least two group focal lengths-definition respective value, the focal length from the multiple projector distances prestored with
In the corresponding relation of definition, select and close with the corresponding of definition with the focal length that Current projection distance is mated most
System；
Corresponding relation according to the described focal length that distance is mated most with Current projection with definition, it is thus achieved that current
Pinpointed focus corresponding to utmost sharpness under projector distance；
The focal length of regulation projector is to described pinpointed focus；
Described focal length and the function curve diagram that corresponding relation is focal length and definition of definition；Described basis
Described focal length-definition respective value, the focal length pass corresponding with definition from the multiple projector distances prestored
In system, select the corresponding relation of focal length and the definition mated most with Current projection distance, including:
Using described focal length-definition respective value as coordinate figure, and by the coordinate points corresponding to described coordinate figure
In the coordinate system at the function curve diagram place being marked on described focal length and definition；
The letter the highest with described coordinate points registration is selected from the described focal length function curve diagram with definition
Number curve figure, as the function curve diagram of the focal length mated most with Current projection distance with definition.
The method of regulation projector focal length the most according to claim 1, it is characterised in that described in obtain
Take Current projection apart under at least two group focal lengths-definition respective value include:
Project under Current projection distance；
Acquired projections image, it is thus achieved that the definition of described projection picture and current focal length, obtains one group of Jiao
Away from-definition respective value；
It is automatically adjusted focal length, repeats previous step, obtain another group focal length-definition respective value, finally obtain
Take at least two group focal lengths-definition respective value.
The method of regulation projector focal length the most according to claim 1 and 2, it is characterised in that institute
The corresponding relation stating focal length and definition is: focal length and the function expression of definition, function curve diagram or
Corresponding form.
The method of regulation projector focal length the most according to claim 1, it is characterised in that described
Corresponding relation according to the described focal length that distance is mated most with Current projection with definition, it is thus achieved that Current projection away from
From the pinpointed focus corresponding to lower utmost sharpness, including:
Obtain the summit of the function curve diagram of the described focal length mated most with Current projection distance and definition
Coordinate figure, using the vertical coordinate in described coordinate figure as Current projection apart under utmost sharpness, by institute
State the abscissa in coordinate figure as Current projection apart from the pinpointed focus corresponding to lower utmost sharpness.
5. the device regulating projector focal length, it is characterised in that include acquisition module, processing module
And adjustment module, wherein:
Acquisition module, for obtain Current projection apart under at least two group focal lengths-definition respective value；
Processing module, for according to described at least two group focal lengths-definition respective value, from the multiple throwings prestored
Shadow apart under focal length and definition corresponding relation in, select the focal length mated most with Current projection distance
Corresponding relation with definition；Right according to the described focal length that distance is mated most with Current projection and definition
Should be related to, it is thus achieved that Current projection is apart from the pinpointed focus corresponding to lower utmost sharpness；Described focal length is with clear
The corresponding relation of clear degree is the function curve diagram of focal length and definition, and described processing module is used for: by described
Focal length-definition respective value is as coordinate figure, and the coordinate points corresponding to described coordinate figure is marked on described
In the coordinate system at the function curve diagram place of focal length and definition；Bent with the function of definition from described focal length
Line chart is selected the function curve diagram the highest with described coordinate points registration, as with Current projection distance
The focal length of coupling and the function curve diagram of definition；
Adjustment module, for regulating the focal length of projector to described pinpointed focus.
The device of regulation projector focal length the most according to claim 5, it is characterised in that described in obtain
Delivery block is used for: gather Current projection apart under projection picture, it is thus achieved that the definition of described projection picture
With current focal length, obtain one group of focal length-definition respective value；Control described adjustment module and be automatically adjusted Jiao
Away from, obtain another group focal length-definition respective value, final acquisition at least two group focal lengths-definition respective value.
7. according to the device of the regulation projector focal length described in claim 5 or 6, it is characterised in that institute
The corresponding relation stating focal length and definition is: focal length and the function expression of definition, function curve diagram or
Corresponding form.
The device of regulation projector focal length the most according to claim 5, it is characterised in that described place
Reason module is used for: obtain the described focal length mated most with Current projection distance and the function curve diagram of definition
The coordinate figure on summit, using the vertical coordinate in described coordinate figure as Current projection apart under maximum clear
Degree, using the abscissa in described coordinate figure as optimal apart from corresponding to lower utmost sharpness of Current projection
Focal length.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510023687.5A CN104536249B (en) | 2015-01-16 | 2015-01-16 | The method and apparatus of regulation projector focal length |
| PCT/CN2015/089551 WO2016112704A1 (en) | 2015-01-16 | 2015-09-14 | Method and device for adjusting focal length of projector, and computer storage medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510023687.5A CN104536249B (en) | 2015-01-16 | 2015-01-16 | The method and apparatus of regulation projector focal length |
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| CN104536249B true CN104536249B (en) | 2016-08-24 |
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| CN104536249B (en) * | 2015-01-16 | 2016-08-24 | 努比亚技术有限公司 | The method and apparatus of regulation projector focal length |
| CN106154721B (en) | 2015-04-27 | 2021-01-01 | 中兴通讯股份有限公司 | Distance measuring method, automatic focusing method and device |
| CN104935849B (en) * | 2015-06-08 | 2018-10-12 | 联想(北京)有限公司 | A kind of information processing method and electronic equipment |
| CN105208308B (en) * | 2015-09-25 | 2018-09-04 | 广景视睿科技（深圳）有限公司 | A kind of method and system for the best projection focus obtaining projecting apparatus |
| CN105301885B (en) * | 2015-11-30 | 2017-12-08 | 成都市极米科技有限公司 | A kind of projector equipment fixed-focus system, focus method and remote control matching method |
| CN105824180A (en) * | 2016-03-29 | 2016-08-03 | 乐视控股（北京）有限公司 | Method and device for regulating focal length of projector |
| CN105721842B (en) * | 2016-04-08 | 2018-08-24 | 海尔优家智能科技（北京）有限公司 | Projecting method, device and the robot of robot with projecting function |
| CN107318007A (en) * | 2016-04-27 | 2017-11-03 | 中兴通讯股份有限公司 | The method and device of projected focus |
| CN105842972A (en) * | 2016-04-28 | 2016-08-10 | 乐视控股（北京）有限公司 | Method for adjusting projection focal length of projector and projector |
| CN107343184A (en) * | 2016-05-03 | 2017-11-10 | 中兴通讯股份有限公司 | Projecting apparatus processing method, device and terminal |
| CN106231201B (en) * | 2016-08-31 | 2020-06-05 | 成都极米科技股份有限公司 | Automatic focusing method and device |
| CN108124145A (en) * | 2016-11-30 | 2018-06-05 | 中兴通讯股份有限公司 | A kind of method and device for projector equipment |
| CN106604005B (en) * | 2016-12-20 | 2019-09-10 | 深圳市Tcl高新技术开发有限公司 | A kind of projection TV Atomatic focusing method and system |
| CN107515454B (en) * | 2017-08-29 | 2019-12-20 | 宁夏巨能机器人股份有限公司 | Automatic focal length adjusting device for 3D visual positioning and adjusting method thereof |
| CN107911676B (en) * | 2017-11-28 | 2020-03-27 | 海信集团有限公司 | Focal length adjusting method and device for projection equipment |
| CN109856902A (en) * | 2017-11-30 | 2019-06-07 | 中强光电股份有限公司 | Projection arrangement and Atomatic focusing method |
| CN111064939A (en) * | 2018-10-16 | 2020-04-24 | 中强光电股份有限公司 | Projection system and trapezoidal correction method |
| CN110491316A (en) * | 2019-07-08 | 2019-11-22 | 青岛小鸟看看科技有限公司 | A kind of projector and its method for controlling projection |
| CN110996085A (en) * | 2019-12-26 | 2020-04-10 | 成都极米科技股份有限公司 | Projector focusing method, projector focusing device and projector |
| CN112415841A (en) * | 2020-10-27 | 2021-02-26 | 歌尔智能科技有限公司 | Projection device, projection system and projection method |
| CN112764305A (en) * | 2021-01-27 | 2021-05-07 | 深圳市火乐科技发展有限公司 | Automatic focusing assembly, automatic focusing method and projector |
| WO2023087948A1 (en) * | 2021-11-16 | 2023-05-25 | 海信视像科技股份有限公司 | Projection device and display control method |
| CN114466173A (en) * | 2021-11-16 | 2022-05-10 | 海信视像科技股份有限公司 | Projection equipment and projection display control method for automatically throwing screen area |
| CN114740681B (en) * | 2022-04-19 | 2023-10-03 | 深圳市和天创科技有限公司 | Intelligent ranging adjustment system of monolithic liquid crystal projector with rotary lens |
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| CN104536249A (en) | 2015-04-22 |
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