CN104318912B - Method and device for detecting environmental light brightness - Google Patents
Method and device for detecting environmental light brightness Download PDFInfo
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- CN104318912B CN104318912B CN201410571274.6A CN201410571274A CN104318912B CN 104318912 B CN104318912 B CN 104318912B CN 201410571274 A CN201410571274 A CN 201410571274A CN 104318912 B CN104318912 B CN 104318912B
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- 230000007613 environmental effect Effects 0.000 title claims abstract description 155
- 238000000034 method Methods 0.000 title claims abstract description 33
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Abstract
Disclosed is a method for detecting environmental light brightness. The method includes that a light sensor that is arranged on a projection device senses light that comes from the direction of a projection screen, a pre-set operation is performed at projection free time so that a first pre-set image and a second pre-set image can be displayed on the projection screen, light sensing values of the first pre-set image and the second pre-set image can be obtained, accordingly, a reference value and a valve value of environmental light brightness changes can be obtained, after the current environmental light brightness value is obtained, change direction and quantity value of practical environmental light brightness can be obtained according to the reference value and the valve value of the environmental light brightness changes, and current practical environmental light brightness value can be obtained according to the change direction and the quantity value of the practical environmental light brightness and the light sensing value of the second pre-set image. Besides, the invention further provides a device for detecting environmental light brightness. According to the method and the device for detecting environmental light brightness, the real-time detecting accuracy of the environmental light brightness can be improved while the projection device projects images.
Description
Technical field
The present invention relates to field of computer technology, more particularly, to a kind of method and device of detection environmental light brightness.
Background technology
With the development of projector equipment technology, the place using projector equipment also gets more and more, and particularly micro projection sets
Standby appearance, due to its small volume, Mobile portable, low-power consumption is accepted by more and more people, but its disadvantage is projection stream
Lightness is not fully up to expectations, and environmental light brightness is very big to projected image influential effect, such as natural light, these light sources of light etc.
Presence on projection image quality affect very big.Creating for this can be dynamic according to environmental light parameter and picture material
Change image local brightness, strengthen picture contrast, make the technology that projected image becomes apparent from.But this technology with depending on
In the accurate detecting to environmental light brightness, the detecting of environmental light brightness is inaccurate necessarily to make this image algorithm lose efficacy.So solution
Certainly how accurately to detect that the problem of environmental light brightness becomes a difficult problem.
In prior art, it usually needs just obtain photoinduction value using optical sensor towards the environment light direction needing detection
The result of environmental light brightness can be obtained.But go to detect environmental light brightness, sensillum opticum while projection image
What part sensed is not merely the brightness of ambient light, projected image inherently one of light source when projection device operation,
And it may be also higher than actual environmental light brightness, now obtain on optical sensor is to contain projection figure
Image brightness, in interior ambient light value, is not real environmental light brightness.
Content of the invention
In view of this, the present invention provides a kind of method and device of detection environmental light brightness, in order to improve in projector equipment
Projection image detects the accuracy of environmental light brightness simultaneously in real time.
The method of detection environmental light brightness provided in an embodiment of the present invention, comprising:
It is derived from the light in projection screen direction by the photosensitive sensors detection being assemblied on projector equipment；Idle in projection
The preset operation of opportunity execution is so that assume the first preset image and the second preset image on described projection screen；Obtain institute
State the first preset image and the light sensing value of described second preset image, and the light sense according to the described first preset image
Should be worth and described second preset image light sensing value, obtain environmental light brightness change reference value and environmental light brightness
The valve value of change；Obtain current environmental light brightness value in real time, and according to described current environmental light brightness value, described ambient light
The reference value of brightness flop, and the valve value of described environmental light brightness change, determine the change direction of actual environment brightness
And value；Change direction according to described actual environment brightness and value, and the light sensing of described second preset image
Value, obtains the value of currently practical environmental light brightness.
The device of detection environmental light brightness provided in an embodiment of the present invention, comprising:
Detector unit, for the light from projection screen direction for the photosensitive sensors detection by being assemblied on projector equipment
Line；Processing unit, for the operation preset in projection execution of idle opportunity so that assuming the first preset shadow on described projection screen
Picture and the second preset image；Acquiring unit, for obtaining the light of the described first preset image and described second preset image
Line influence value；Obtaining unit, for the light sensing value according to the described first preset image and described second preset image
Light sensing value, obtains the reference value of environmental light brightness change and the valve value of environmental light brightness change；Described acquiring unit,
It is additionally operable to obtain current environmental light brightness value in real time；Determining unit, for according to described current environmental light brightness value, described ring
The reference value of border brightness change, and the valve value of described environmental light brightness change, determine the change of actual environment brightness
Direction and value；Described obtaining unit, is additionally operable to change direction according to described actual environment brightness and value and described
The light sensing value of the second preset image, obtains the value of currently practical environmental light brightness.
The method and device of detection environmental light brightness provided in an embodiment of the present invention, when projector equipment is idle in projection
Machine, projects the first preset image and the second preset image in projection screen, and the light sensing according to this first preset image
Value and the light sensing value of this second preset image, obtain reference value and the environmental light brightness change of environmental light brightness change
Valve value, determine therefrom that the change direction of actual environment brightness and value and obtain the value of actual environment brightness, can be real
Now do not affect the change of real-time detection environmental light brightness while projector equipment normally projects image, improve detection environmental light brightness
Accuracy, and can achieve according to environmental light brightness dynamic regulation image parameter and further improve projected image picture
Matter.
It is that the above and other objects, features and advantages of the present invention can be become apparent, preferred embodiment cited below particularly,
And coordinate institute's accompanying drawings, it is described in detail below.
Brief description
Fig. 1 is the application scenarios schematic diagram of the method for detection environmental light brightness provided in an embodiment of the present invention.
The schematic flow sheet of the method for the detection environmental light brightness that Fig. 2 provides for first embodiment of the invention.
The schematic diagram of the device of the detection environmental light brightness that Fig. 3 provides for second embodiment of the invention.
The schematic diagram of the device of the detection environmental light brightness that Fig. 4 provides for third embodiment of the invention.
Specific embodiment
For further illustrating that the present invention is to realize technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Accompanying drawing and preferred embodiment, to the specific embodiment of the foundation present invention, structure, feature and its effect, after describing in detail such as.
Refer to Fig. 1, the application scenarios of the method for the detection environmental light brightness that Fig. 1 provides for first embodiment of the invention show
It is intended to.
Projector equipment 101 comprises photosensitive sensors 102 and projection lens 103, and projector equipment passes through projection lens 103 to throwing
Shadow screen 104 projects image 105.Photosensitive sensors 102 can perceive the light from projection screen 104 direction, and sensing range is such as
Scope shown in dotted-line ellipse in Fig. 1 projection screen 104.
Refer to Fig. 2, the method for detection environmental light brightness provided in an embodiment of the present invention, comprising:
Step 201, by the detection of the photosensitive sensors that are assemblied on projector equipment the light from projection screen direction；
Photosensitive sensors are equipped with projector equipment, and the sensing direction of this photosensitive sensors and projector equipment are to projection
The direction that screen projects image is identical, and that is, photosensitive sensors can sense the light from projection screen direction.
Step 202, in the preset operation of projection execution of idle opportunity so that the first preset image is presented on this projection screen
And the second preset image；
When projector equipment is not in projection state, or the user of projector equipment is carried out except throwing in manual operation projector equipment
Other actions outside shadow, that is, be in projection idle opportunity, now executes preset operation and does not affect user and normally watches in projection
Hold.
Specifically, whether detection of projection devices is in projection idle opportunity can following two modes:
(1) projector equipment has detected audio/video signal input, but not complete this audio/video defeated for projector equipment
Enter the parsing of signal, this audio/video signal content image could not be projected to projection screen；
(2) there is user operation projector equipment man machine interface, such as during touching button switching image model.
Equipment is in projection idle opportunity, then execute preset operation so that assuming the first preset shadow on this projection screen
Picture and the second preset image.
Specifically, the preset operation of execution may include that to this throwing so that assuming the first preset image on this projection screen
Shadow screen projects full screen whole white image so that assuming whole white image on this projection screen, or, to this projection screen
Project the white image of the preset shade of gray of full screen so that the white image of this preset shade of gray is presented on this projection screen；
Execute preset operation to may include that to this projection screen so that the second preset image is presented on this projection screen
Project full screen all black image, or, close projector equipment camera lens so that all black image is presented on this projection screen.
Step 203, obtain the light sensing value of this first preset image and this second preset image, and according to this first
The light sensing value of preset image and the light sensing value of this second preset image, obtain the reference value of environmental light brightness change
And the valve value of environmental light brightness change；
When being projected out full screen whole white image on this projection screen, record photosensitive sensors are to from this projection screen
Light influence value.The preset shade of gray of full screen is projected out on this projection screen, i.e. certain specific grey-scale degree known
During white image, the influence value to the light from this projection screen for the photosensitive sensors, and based on coaptation go out full frame
The influence value of the light from this projection screen during curtain whole white image.By projector equipment projection full screen entirely white image when,
The influence value of the light that photosensitive sensors obtain is defined as sensordet_w.
So, on the premise of actual environment brightness does not change, projector equipment projects full screen whole white image
Moment, due to whole white image brightness be more than other color images brightness, therefore, being derived from acquired in photosensitive sensors
The influence value of the light of this projection screen is maximum influence value, i.e. now projector equipment projects any image to this projection screen,
The influence value of the light acquired in photosensitive sensors both less than or is equal to this maximum influence value.Here, actual environment light
Degree refers to that projector equipment does not project the light sensation influence value of residing true environment brightness during any image, is defined as
sensordet_t.
When affecting in no actual environment brightness, the sense of the light that photosensitive sensors obtain when projector equipment projects image
Should be worth and be defined as sensordet_p, that is, refer to the brightness of the image of projection itself.
Further, the influence value of light photosensitive sensors at any time being obtained is defined as sensordet_r,
That is, actual environment brightness values sensordet_r gathering in real time, then the sense of the light that any time photosensitive sensors obtain
Should be worth is actual environment brightness and being superimposed of projecting image brilliance.I.e. sensordet_r=sensordet_t+
sensordet_p.
When projector equipment is to this projection screen projection full screen full brightness white image, sensordet_r=
Sensordet_w, so when sensordet_w=sensordet_t+sensordet_p, and because any moment
Sensordet_t ＞=0, therefore can derive sensordet_w ＞=sensordet_p.
On the other hand, on the premise of actual environment brightness does not change, projector equipment projects full screen all black
The moment of image, because the brightness of all black image is less than the brightness of other color images, therefore, acquired in photosensitive sensors
It is minimum influence value from the influence value of the light of this projection screen, i.e. now projector equipment is any to the projection of this projection screen
Image, the influence value of the light acquired in photosensitive sensors both greater than or is equal to this minimum influence value.
It should be noted that when projector equipment is to this projection screen projection full screen all black image, photosensitive sensors institute
The influence value of the light from this projection screen obtaining is equal to the value of actual environment brightness, and that is, no feelings shown by projector equipment
The influence value of the light that photosensitive sensors obtain under condition.During by the projector equipment projection completely black image of full screen, photosensitive sensors obtain
The influence value of the light taking is defined as sensordet_b.
Generally, when projector equipment is to this projection screen projection full screen all black image, will not be to surrounding
Actual environment brightness produce impact, therefore sensordet_t ≈ sensordet_b, thus can derive sensordet_r
=sensordet_b+sensordet_p.
Therefore think when projection full screen black image, the now influence value of the light that photosensitive sensors obtain
For 0, that is, as sensordet_p=0, can be derived by sensordet_r=sensordet_b+sensordet_p
Sensordet_r=sensordet_b, the light that is, photosensitive sensors acquired when projecting full screen black image obtain
Influence value be exactly actual environment brightness at that time.
The value that therefore can confirm that the sensordet_b now obtaining is currently practical environmental light brightness, or can be now
The value of sensordet_b is that main reference value goes to set projector equipment image parameter as currently practical environmental light brightness.
And, any moment sensordet_p ＞=0, so by sensordet_r=sensordet_b+
Sensordet_p can derive sensordet_r ＞=sensordet_b.That is, not changing in actual environment brightness
In the case of, when projector equipment projects any image, the influence value of the light from this projection screen that photosensitive sensors obtain
Both greater than or equal to influence value during projection full screen black image.Therefore using sensordet_b as actual environment light not
Minimum light influence value during change.
Further, the reference value that environmental light brightness changes is defined as ebreference, calculates this first preset image
The light sensing value of light sensing value and this second preset image meansigma methodss, by the area with this average value default value
Between the reference value that changes as this environmental light brightness of arbitrary value in scope, i.e. calculate (sensordet_w+sensordet_
B)/2 numerical value, the arbitrary value in the interval range that default value will be differed with this numerical value as ebreference, for example,
(sensordet_w+sensordet_b)/2=120, then can arrange the arbitrary value conduct in 110～130 this interval range
ebreference.
Further, photosensitive sensors are defined as △ sensordet to the sensing change valve value of light, calculating should
The light sensing value of the first preset image and 1/2nd of the difference of light sensing value of this second preset image, and will be with meter
The numerical value obtaining differs the valve value that the arbitrary value in the interval range of default value changes as this environmental light brightness.That is,
Calculate the numerical value of (sensordet_w-sensordet_b)/2, by the interval range differing default value with the numerical value obtaining
Arbitrary value as △ sensordet, for example, (sensordet_w-sensordet_b)/2=60, then can arrange 50～70
Arbitrary value in this interval range is as △ sensordet.
Step 204, in real time acquisition current environmental light brightness value, and according to this current environment brightness values, this ambient light
The reference value of brightness flop, and this environmental light brightness change valve value, determine actual environment brightness change direction and
Value；
The change direction of actual environment brightness refers to that actual environment brightness brightens or dimmed, actual environment brightness
Change value refers to the value that actual environment brightness changes.
Obtain environment bright angle value sensordet_r of current Real-time Collection, and according to this current environment brightness values
Sensordet_r, reference value ebreference of this environmental light brightness change, and the valve value of this environmental light brightness change
△ sensordet, determines whether actual environment brightness changes, if this actual environment brightness changes, basis
This current environment brightness values sensordet_r calculates this reality with reference value ebreference of this environmental light brightness change
The change value △ ebsensor of environmental light brightness.
Specifically, if the reference value of this current environment brightness values sensordet_r and environmental light brightness change
The absolute value of the difference between ebreference is more than the valve value △ sensordet of environmental light brightness change, that is, |
Sensordet_r-ebreference | ＞ △ sensordet is it is determined that actual environment brightness changes.Then, compare
The size of reference value ebreference that current environmental light brightness value sensordet_r is changed with environmental light brightness, if
Sensordet_r ＞ ebreference it is determined that actual environment brightness brightens, if sensordet_r ＜ ebreference,
Then determine that actual environment brightness is dimmed, by the difference of this current environment brightness values and the reference value of this environmental light brightness change
Absolute value as the change value of this actual environment brightness, the change value of this actual environment brightness is defined as δ
Ebsensor, i.e. i.e. δ ebsensor=| sensordet_r-ebreference |.
Step 205, the change direction according to this actual environment brightness and value and the light of this second preset image
Influence value, obtains currently practical environment bright angle value.
If actual environment brightness brightens, the light sensing value of this second preset image and this actual environment brightness
Change value sum is the value that this states actual environment brightness, if actual environment brightness is dimmed, this second preset image
The difference of the change value of light sensing value and this actual environment brightness is the value of this actual environment brightness.
Specifically, after the change direction calculating actual environment brightness and change value, after calculating change
The value of actual environment brightness is:
When actual environment brightness brightens, sensordet_t=sensordet_b+ δ ebsensor.
When actual environment brightness is dimmed, sensordet_t=sensordet_b- δ ebsensor.
The value that the value calculating is currently practical environmental light brightness, or the value calculating is that main reference value is made
Go to set projector equipment image parameter for currently practical environmental light brightness.
In the present embodiment, when projector equipment is in projection idle opportunity, projection screen project the first preset image and
Second preset image, and the light sensing value of the light sensing value according to this first preset image and this second preset image,
Obtain the reference value of environmental light brightness change and the valve value of environmental light brightness change, determine therefrom that actual environment brightness
Change direction and value simultaneously obtain the value of actual environment brightness, while can achieve that not affecting projector equipment normally projects image
The change of real-time detection environmental light brightness, improves the accuracy of detection environmental light brightness, and can achieve according to environmental light brightness
Dynamic regulation image parameter and the image quality improving projected image further.
Refer to Fig. 3, the device of the detection environmental light brightness that Fig. 3 provides for second embodiment of the invention, this device includes:
Detector unit 31, processing unit 32, acquiring unit 33, obtaining unit 34 and determining unit 35.
Wherein, detector unit 31, are derived from projection screen for the photosensitive sensors detection by being assemblied on projector equipment
The light in direction；
Processing unit 32, for the operation preset in projection execution of idle opportunity so that assuming first on this projection screen
Preset image and the second preset image；
Acquiring unit 33, for obtaining the light sensing value of this first preset image and this second preset image；
Obtaining unit 34, for the light of the light sensing value according to this first preset image and this second preset image
Influence value, obtains the reference value of environmental light brightness change and the valve value of environmental light brightness change；
Acquiring unit 33, is additionally operable to obtain current environmental light brightness value in real time；
Determining unit 35, for the reference value being changed according to this current environment brightness values, this environmental light brightness, and should
The valve value of environmental light brightness change, determines change direction and the value of actual environment brightness；
Obtaining unit 34, is additionally operable to the change direction according to this actual environment brightness and value, and this is second preset
The light sensing value of image, obtains the value of currently practical environmental light brightness.
The each unit of the device of detection environmental light brightness in the embodiment of the present invention executes the process of respective function, referring to upper
State the description of embodiment in Fig. 2, here is omitted.
In the present embodiment, when projector equipment is on projection idle opportunity, project the first preset image and the in projection screen
Two preset images, and the light sensing value of the light sensing value according to this first preset image and this second preset image, obtain
Obtain the reference value of environmental light brightness change and the valve value of environmental light brightness change, determine therefrom that the change of actual environment brightness
Change direction and value and obtain the value of actual environment brightness, can achieve that not affecting projector equipment normally projects while image in fact
When detection environmental light brightness change, improve detection environmental light brightness accuracy, and can achieve according to environmental light brightness move
The image quality that state adjusts image parameter and improves projected image further.
Refer to Fig. 4, the device of the detection environmental light brightness that Fig. 4 provides for third embodiment of the invention, this device includes:
Detector unit 41, processing unit 42, first processing units 421, second processing unit 422, acquiring unit 43, obtaining unit 44,
Determining unit 45 and comparing unit 46.
Wherein, detector unit 41, are derived from projection screen for the photosensitive sensors detection by being assemblied on projector equipment
The light in direction；
Processing unit 42, for the operation preset in projection execution of idle opportunity so that assuming first on this projection screen
Preset image and the second preset image；
Acquiring unit 43, for obtaining the light sensing value of this first preset image and this second preset image；
Obtaining unit 44, for the light of the light sensing value according to this first preset image and this second preset image
Influence value, obtains the reference value of environmental light brightness change and the valve value of environmental light brightness change；
Acquiring unit 43, is additionally operable to obtain current environmental light brightness value in real time；
Determining unit 45, for the reference value being changed according to this current environment brightness values, this environmental light brightness, and should
The valve value of environmental light brightness change, determines change direction and the value of actual environment brightness；
Obtaining unit 44, is additionally operable to the change direction according to this actual environment brightness and value and this second preset shadow
The light sensing value of picture, obtains the value of currently practical environmental light brightness.
Processing unit 42 can also further include:
First processing units 421, for projecting full screen whole white image to this projection screen, or, full screen is pre-
Put the white image of shade of gray so that the white image of this whole white image or this preset shade of gray is presented on this projection screen；
Second processing unit 422, is additionally operable to project full screen all black image to this projection screen, or, close and throw
Shadow equipment camera lens is so that assume all black image on this projection screen.
Further, acquiring unit 43, are additionally operable to obtain the light sensing value of this whole white image, or, it is preset to obtain this
The light sensing value of shade of gray white image.
Obtaining unit 44, is additionally operable to the light of this preset shade of gray white image according to this preset shade of gray and acquisition
Influence value calculates the light sensing value of whole white image.
Obtaining unit 44, is additionally operable to calculate the light with this second preset image for the light sensing value of this first preset image
The meansigma methodss of influence value, will be become as this environmental light brightness with the arbitrary value in the interval range of this average value default value
The reference value changed.
Obtaining unit 44, is additionally operable to calculate the light with this second preset image for the light sensing value of this first preset image
/ 2nd of the difference of influence value, and the arbitrary value in the interval range being differed default value with calculated numerical value is made
Valve value for the change of this environmental light brightness.
Determining unit 45, if be additionally operable between this current environment brightness values and the reference value of this environmental light brightness change
The absolute value of difference is more than the valve value of this environmental light brightness change it is determined that actual environment brightness changes.
Further, this device also includes:
Comparing unit 46, for compare the reference value that this current environment brightness values is changed with this environmental light brightness greatly
Little, if this current environment brightness values is more than the reference value of this environmental light brightness change, actual environment brightness brightens, if should
Current environmental light brightness value is less than the reference value of this environmental light brightness change, then actual environment brightness is dimmed.
Obtaining unit 44, is additionally operable to the difference of this current environment brightness values and the reference value of this environmental light brightness change
Absolute value as this actual environment brightness change value.
Obtaining unit 44, if be additionally operable to actual environment brightness brightening, the light sensing value of this second preset image with
The change value sum of this actual environment brightness is the value of this actual environment brightness, if actual environment brightness is dimmed,
The light sensing value of this second preset image is this actual environment brightness with the difference of the change value of this actual environment brightness
Value.
The each unit of the device of detection environmental light brightness in the embodiment of the present invention executes the process of respective function, referring to upper
State the description of embodiment in Fig. 2 and Fig. 3, here is omitted.
In the present embodiment, when projector equipment is on projection idle opportunity, project the first preset image and the in projection screen
Two preset images, and the light sensing value of the light sensing value according to this first preset image and this second preset image, obtain
Obtain the reference value of environmental light brightness change and the valve value of environmental light brightness change, determine therefrom that the change of actual environment brightness
Change value and obtain the value of actual environment brightness, can achieve does not affect real-time detection while projector equipment normally projects image
The change of environmental light brightness, improves the accuracy of detection environmental light brightness, and can achieve according to environmental light brightness dynamic regulation
Image parameter and the image quality improving projected image further.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation are made a distinction with another entity or operation, and not necessarily require or imply these entities or deposit between operating
In any this actual relation or order.And, term " inclusion ", "comprising" or its any other variant are intended to
Comprising of nonexcludability, wants so that including a series of process of key elements, method, article or device and not only including those
Element, but also include other key elements being not expressly set out, or also include for this process, method, article or device
Intrinsic key element.In the absence of more restrictions, the key element that limited by sentence " include ... " it is not excluded that
Also there is other identical element in process, method, article or the device including described key element.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can pass through hardware
To complete it is also possible to the hardware being instructed correlation by program is completed, described program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read only memory, disk or CD etc..
The above, be only presently preferred embodiments of the present invention, not the present invention is made with any pro forma restriction, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any is familiar with this professional technology people
Member, in the range of without departing from technical solution of the present invention, when the technology contents of available the disclosure above make a little change or modification
For the Equivalent embodiments of equivalent variations, as long as being without departing from technical solution of the present invention content, according to the technical spirit pair of the present invention
Any simple modification, equivalent variations and modification that above example is made, all still fall within the range of technical solution of the present invention.
Claims (12)
1. a kind of method of detection environmental light brightness is it is characterised in that include:
It is derived from the light in projection screen direction by the photosensitive sensors detection being assemblied on projector equipment；
In the preset operation of projection execution of idle opportunity so that the first preset image and second pre- is presented on described projection screen
Put image；
Obtain the described first preset image and the light sensing value of described second preset image, and according to the described first preset shadow
The light sensing value of picture and the light sensing value of described second preset image, obtain environmental light brightness change reference value and
The valve value of environmental light brightness change；
Obtain current environmental light brightness value in real time, and according to described current environmental light brightness value, described environmental light brightness change
Reference value, and described environmental light brightness change valve value, determine change direction and the value of actual environment brightness；
Change direction according to described actual environment brightness and value, and the light sensing value of described second preset image,
Obtain currently practical environment bright angle value.
2. method according to claim 1 is it is characterised in that the preset operation of described execution is so that described projection screen
On assume the first preset image and include:
Project full screen whole white image to described projection screen, or, the white image of the preset shade of gray of full screen so that
Described whole white image or the white image of described preset shade of gray are presented on described projection screen.
3. method according to claim 1 is it is characterised in that the preset operation of described execution is so that described projection screen
On assume the second preset image and include:
Project full screen all black image to described projection screen, or, close projector equipment camera lens so that described projection screen
All black image is assumed on curtain.
4. method according to claim 2 is it is characterised in that obtain the light sensing value bag of the described first preset image
Include:
Obtain the light sensing value of described whole white image；
Or,
Obtain the light sensing value of described preset shade of gray white image, and according to described preset shade of gray and acquisition
The light sensing value of preset shade of gray white image calculates the light sensing value of whole white image.
5. method according to claim 1 is it is characterised in that the described light sensing value according to the described first preset image
And the light sensing value of described second preset image, the reference value obtaining environmental light brightness change includes:
Calculate the meansigma methodss of the light sensing value of the described first preset image and the light sensing value of described second preset image, will
The reference value changing as described environmental light brightness with the arbitrary value in the interval range of described average value default value.
6. method according to claim 1 is it is characterised in that the described light sensing value according to the described first preset image
And the light sensing value of described second preset image, the valve value obtaining environmental light brightness change includes:
Calculate the two of the light sensing value of the described first preset image and the difference of light sensing value of described second preset image
Arbitrary value in/mono-, and the interval range that will differ default value with calculated numerical value is as described environmental light brightness
The valve value of change.
7. the method according to claim 5 or 6 it is characterised in that described according to described current environmental light brightness value, described
The reference value of environmental light brightness change, and the valve value of described environmental light brightness change, determine the change of actual environment brightness
Change direction and value include:
If described current environmental light brightness value and photosensitive sensors detection from projection screen direction light；Idle in projection
The preset operation of opportunity execution is so that the absolute value of difference between the reference value of institute's described environmental light brightness change is more than described
The valve value of environmental light brightness change is it is determined that actual environment brightness changes；
Compare the size of described current environmental light brightness value and the reference value of described environmental light brightness change, if described current environment
Brightness values are more than the reference value of described environmental light brightness change, then actual environment brightness brightens, if described current environment light
Brightness value is less than the reference value of described environmental light brightness change, then actual environment brightness is dimmed；
The absolute value of the difference of the reference value that described current environmental light brightness value is changed with described environmental light brightness is as reality
The change value of environmental light brightness.
8. method according to claim 7 is it is characterised in that the described change direction according to described actual environment brightness
With the light sensing value of value and described second preset image, the value obtaining actual environment brightness includes:
If actual environment brightness brightens, the light sensing value of described second preset image and described actual environment brightness
Change value sum is the value of described actual environment brightness, if actual environment brightness is dimmed, described second preset image
The change value of light sensing value and described actual environment brightness difference be described actual environment brightness value.
9. a kind of device of detection environmental light brightness is it is characterised in that include:
Detector unit, for the light from projection screen direction for the photosensitive sensors detection by being assemblied on projector equipment；
Processing unit, for the operation preset in projection execution of idle opportunity so as to assume first on described projection screen preset
Image and the second preset image；
Acquiring unit, for obtaining the light sensing value of the described first preset image and described second preset image；
Obtaining unit, for the light sense of the light sensing value according to the described first preset image and described second preset image
Should be worth, obtain the reference value of environmental light brightness change and the valve value of environmental light brightness change；
Described acquiring unit, is additionally operable to obtain current environmental light brightness value in real time；
Determining unit, for the reference value being changed according to described current environmental light brightness value, described environmental light brightness and described
The valve value of environmental light brightness change, determines change direction and the value of actual environment brightness；
Described obtaining unit, is additionally operable to the change direction according to described actual environment brightness and value, and described second pre-
Put the light sensing value of image, obtain the value of currently practical environmental light brightness.
10. device according to claim 9 is it is characterised in that described processing unit also includes:
First processing units, for projecting full screen whole white image to described projection screen, or, the preset GTG of full screen
The white image of degree is so that assume described whole white image or the white image of described preset shade of gray on described projection screen；
Second processing unit, is additionally operable to project full screen all black image to described projection screen, or, close projector equipment
Camera lens is so that assume all black image on described projection screen.
11. devices according to claim 9 or 10 it is characterised in that
Described acquiring unit, is additionally operable to obtain the light sensing value of whole white image, or, obtaining preset shade of gray white image
Light sensing value；
Described obtaining unit, is additionally operable to the light sensing value of the preset shade of gray white image according to preset shade of gray and acquisition
Calculate the light sensing value of whole white image；
Described obtaining unit, is additionally operable to calculate the light with described second preset image for the light sensing value of the described first preset image
The meansigma methodss of line influence value, using with the interval range of described average value default value in arbitrary value as described ambient light
The reference value of brightness flop；
Described obtaining unit, is additionally operable to calculate the light with described second preset image for the light sensing value of the described first preset image
/ 2nd of the difference of line influence value, and by the arbitrary value in the interval range differing default value with calculated numerical value
Valve value as the change of described environmental light brightness.
12. devices according to claim 11 it is characterised in that
Described determining unit, if be additionally operable between described current environmental light brightness value and the reference value of described environmental light brightness change
The absolute value of difference be more than the valve value of described environmental light brightness change it is determined that actual environment brightness changes；
Described device also includes:
Comparing unit, for the size of relatively described current environmental light brightness value and the reference value of described environmental light brightness change,
If described current environmental light brightness value is more than the reference value of described environmental light brightness change, actual environment brightness brightens, if
Described current environmental light brightness value is less than the reference value of described environmental light brightness change, then actual environment brightness is dimmed；
Described obtaining unit, is additionally operable to the difference of described current environmental light brightness value and the reference value of described environmental light brightness change
The absolute value of value is as the change value of described actual environment brightness；
Described obtaining unit, if be additionally operable to actual environment brightness brightening, the light sensing value of described second preset image with
The change value sum of described actual environment brightness is the value of described actual environment brightness, if actual environment brightness becomes
Secretly, then the light sensing value of described second preset image and the difference of the change value of described actual environment brightness are described reality
The value of environmental light brightness.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105847774B (en) * | 2016-05-05 | 2018-10-26 | 深圳市Tcl高新技术开发有限公司 | Projecting apparatus output mode switching method and system |
| CN107665697B (en) * | 2017-10-20 | 2019-07-26 | 维沃移动通信有限公司 | A kind of adjusting method and mobile terminal of screen intensity |
| CN109729327B (en) * | 2017-10-31 | 2022-01-28 | 海信视像科技股份有限公司 | Image display method, device and system |
| CN107945769B (en) * | 2017-11-22 | 2020-04-10 | Oppo广东移动通信有限公司 | Ambient light intensity detection method and device, storage medium and electronic equipment |
| CN107945770A (en) * | 2017-11-22 | 2018-04-20 | 广东欧珀移动通信有限公司 | Ambient light intensity detection method, device, storage medium and electronic equipment |
| CN107957294B (en) * | 2017-11-22 | 2020-04-10 | Oppo广东移动通信有限公司 | Ambient light intensity detection method and device, storage medium and electronic equipment |
| CN108494936B (en) * | 2018-02-11 | 2021-01-08 | 维沃移动通信有限公司 | Light intensity detection method and mobile terminal |
| CN109862459B (en) * | 2019-03-07 | 2024-04-02 | 歌尔科技有限公司 | TWS earphone device |
| CN110264978B (en) * | 2019-06-28 | 2021-04-13 | 联想(北京)有限公司 | Light intensity correction method, light intensity correction device, and electronic apparatus |
| CN110769238B (en) * | 2019-11-22 | 2021-04-27 | 成都极米科技股份有限公司 | Projection environment brightness detection method and device, electronic equipment and medium |
| CN111459983A (en) * | 2020-03-27 | 2020-07-28 | Tcl移动通信科技（宁波）有限公司 | Light value reporting method and device, storage medium and mobile terminal |
| CN113542700A (en) * | 2020-04-15 | 2021-10-22 | 苏州佳世达光电有限公司 | Control method for projection device and projection device applying control method |
| CN113542708B (en) * | 2021-07-23 | 2022-06-21 | 深圳市火乐科技发展有限公司 | Projection surface parameter confirmation method and device, storage medium and projection equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1577480A (en) * | 2003-06-30 | 2005-02-09 | 三星电子株式会社 | Method of visually measuring brightness of ambient lighting around display device |
| CN101042841A (en) * | 2006-03-20 | 2007-09-26 | 广达电脑股份有限公司 | Lighteness adjusting apparatus and method thereof |
| CN102025893A (en) * | 2009-09-21 | 2011-04-20 | 宏碁股份有限公司 | Projection picture light reflection compensating method and projection device |
| CN102800301A (en) * | 2011-05-27 | 2012-11-28 | 联咏科技股份有限公司 | Display device and image compensation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI268703B (en) * | 2005-04-08 | 2006-12-11 | Benq Corp | Photographing apparatus and compensating method used in the photographing apparatus |
| KR100866486B1 (en) * | 2007-01-04 | 2008-11-03 | 삼성전자주식회사 | Ambient light adaptive color correction method and device for projector |
-
2014
- 2014-10-23 CN CN201410571274.6A patent/CN104318912B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1577480A (en) * | 2003-06-30 | 2005-02-09 | 三星电子株式会社 | Method of visually measuring brightness of ambient lighting around display device |
| CN101042841A (en) * | 2006-03-20 | 2007-09-26 | 广达电脑股份有限公司 | Lighteness adjusting apparatus and method thereof |
| CN102025893A (en) * | 2009-09-21 | 2011-04-20 | 宏碁股份有限公司 | Projection picture light reflection compensating method and projection device |
| CN102800301A (en) * | 2011-05-27 | 2012-11-28 | 联咏科技股份有限公司 | Display device and image compensation method thereof |
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