CN103576845B - Interactive apparatus of the ambient light detection device with method and using this ambient light detection device - Google Patents
Interactive apparatus of the ambient light detection device with method and using this ambient light detection device Download PDFInfo
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Abstract
The present invention provides a kind of ambient light detection device, and reception comes from an at least visible image caused by an Image Sensor, and this ambient light detection device includes an image sampling element and an analysis element.Image sampling element, segmentation visible image are multiple image blocks, capture an at least sample information respectively in image block, and produce a control information according to the sample information of front and rear acquisition.Analysis element compare the analysis of information and produce an analysis output signal.
Description
Technical field
The present invention relates to a kind of ambient light detection device and method, and it is multiple to particularly relate to using one visible image of segmentation
Image block, and sampling is analyzed to obtain a kind of ambient light detection device of analysis output signal respectively in image block
With method.The present invention also relates to the interactive apparatus using such a ambient light detection device.
Background technology
Ambient light sensor (Ambient Light Sensor) is used for the shape for sensing surrounding environment light and analysis environments light
State；Experience similar spectrum of wavelengths effect with human eye vision to produce, the structure of ambient light sensor generally comprises
Plated film, digital analog converter and power amplifier etc..Also, proximity sense (Proximity Sensor) is also used to feel
Light-metering, but its effect is then mainly used for sensing distance；The proximity sense generally additional infrared light supply of palpus, to detect the light source
The reflection light after object is irradiated to, with judging distance.In interactive apparatus, it will usually according to different demands, and use
The sensing device further of variety classes function or different sensing ranges.Reference picture 1, wherein one existing interactive apparatus 10 of display, such as
Mobile phone, personal digital aid (PDA)（PDA）, notebook computer, tablet PC etc..Such interactive apparatus is generally configured with work(of photographing
Can, therefore include Image Sensor 11.And in addition to Image Sensor 11, because appellative function is different, different biographies can be increased
Sensor 12,13 and 14, wherein proximity sense or the ambient light sensor of different detecting specifications etc. can be included.
However, multiple sensors are set in interactive apparatus, and if setting proximity sense need an additional infrared light
Source, either cost, power consumption, complexity etc. are all higher for it.In addition, when interactive apparatus is portable electronic equipment, if
The mode that portable electronic equipment more manipulates is provided, such as waves portable electronic equipment and represents specific manipulation instruction etc., and
It is not required to increase number of elements and complexity, by making, product is more convenient and competitive.
Therefore, how to improve above mentioned problem and meet the demand, the subject under discussion that actually those skilled in the art are paid attention to it
One.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art and defect, proposes a kind of ambient light detection device and side
Method and the interactive apparatus using such a ambient light detection device, can reduce the cost and complexity of product, and provide more
The mode of manipulation.
For the above-mentioned purpose, the present invention provides a kind of ambient light detection device, and reception is produced from an Image Sensor
A raw at least visible image, this ambient light detection device include an image sampling element and an analysis element.Image takes
Sample element, segmentation visible image are multiple image blocks, capture an at least sample information respectively in image block, and according to
The sample information of front and rear acquisition produces a control information.Analysis element compare the analysis of information and produce analysis output news
Number.
Present invention provides a kind of interactive apparatus, comprising：One provides the image sense of the interactive apparatus camera function
Element is surveyed, the Image Sensor is to according to ambient light one image of generation；And an ambient light detection device, in the shadow
A control information is produced as an interior acquisition at least sample information, and according to the sample information of front and rear acquisition, and analyzes the control
Information and produce an analysis output signal.
Present invention provides a kind of ambient light method for detecting, comprising：Taken with the image in an interactive device for photography
Sample element, an image is obtained according to ambient light；An at least sample information is captured in the image；According to those of front and rear acquisition
Sample information produces a control information；And analyze the control information and produce an analysis output signal.
In one embodiment of this invention, the image can averagely be split or ratio is divided into multiple image blocks.
In one embodiment of the invention, the image includes multiple Pixel Informations and each Pixel Information is believed including more sub-pixels
Breath, the sample information is according to brightness, colour temperature, contrast, image texture, particular color or the pixel or sub-pixel that meet specified conditions
Number or the image feature such as shape and produce.The sub-pixel of the particular color is, for example, green sub-pixel.
, can be according to control information and with reference to the use state of interactive apparatus in one embodiment of the invention, and produce and divide
Analyse output signal.The analysis output signal is for example including one below or more persons：Overturn output signal, proximity output signal, ring
Border brightness output signal, gesture output signal, device movement output signal or device wave output signal.
In one embodiment of the invention, a function of the interactive device can be performed according to the analysis output signal.
Below by specific embodiment elaborate, when be easier to understand the purpose of the present invention, technology contents, feature and its
The effect of reached.
Brief description of the drawings
Fig. 1 shows existing interactive apparatus；
Fig. 2 is the schematic diagram of the embodiment of ambient light detection device one of the present invention；
Fig. 2A is the schematic diagram of the embodiment of pixels sense unit one；
The image block that Fig. 3 is the present invention splits schematic diagram；
Another image block that Fig. 3 A are the present invention splits schematic diagram；
Fig. 4 is the schematic diagram of display device turning operation；
Fig. 5 is the schematic diagram of display gesture operation；
Fig. 6 is the schematic diagram of display device movement operation；
Fig. 7 is the schematic diagram of display device swing operation.
Symbol description in figure
10 existing ambient light detection devices
11 Image Sensors
12nd, 13,14 sensor
20 ambient light detection devices
21 image sampling elements
22 analysis elements
D interactive apparatus
F device reverses directions
H hands
The M device directions of motion
S Image Sensors
S1 pixels sense units
S2 visible images
S21 pixels
R, G, B sub-pixel
S devices wave direction
S2B1, S2B2 image block
T preset instructions gestures
Embodiment
For the present invention foregoing and other technology contents, feature and effects, coordinate following with reference to the one preferable of schema
In the detailed description of embodiment, can clearly it present.The direction term being previously mentioned in following examples, such as：Upper and lower, left,
It is right, front or rear etc., only it is the direction with reference to annexed drawings.Schema in the present invention belongs to signal, is mostly intended to represent each device
And the function relation between each element, as shape, thickness and width then and not according to ratio drafting.
The ambient light detection device of the present invention can be applied to various interactive apparatus such as Trackpad, Touch Screen, mobile phone, individual
Personal digital assistant's device（PDA）, notebook computer, in tablet PC etc. or other purposes.
Reference picture 2, wherein the schematic diagram of the ambient light detection device 20 for one embodiment of the invention, its reception comes from a shadow
An at least image as caused by sensing element S.Ambient light detection device 20 can for example be incorporated into a friendship with Image Sensor S
In mutual formula device, when interactive apparatus has been provided with Image Sensor S in itself, ambient light detection device 20 is i.e. using the shadow
As the picture that sensing element S is captured, without setting sensor in addition.Current many portable electronic equipments, it is such as foregoing
Mobile phone, personal digital aid (PDA)（PDA）, notebook computer, tablet PC etc., Image Sensor S, therefore phase have all been set
Compared with existing ambient light sensor, the present invention can have more cost advantage and circuit complexity is relatively low.
The ambient light detection device 20 of the present invention includes an image sampling element 21 and an analysis element 22.When image sense
It is not that Image Sensor S is typically to offer photography when aiming to coordinate ambient light detection device 20 and set to survey element S
（Photograph or video recording）Function, therefore Image Sensor S will produce visible image（But the invention is not limited in this；Shadow
As sensing element S can also produce non-visible light image, such as infrared image）.Image sampling element 21 is by Image Sensor S
The visible image captured is divided into multiple image blocks (Fig. 3, symbol S2B1) (with reference to figure 3, symbol S2), in image block
An at least sample information is inside captured respectively, and a control information is produced according to the sample information of front and rear acquisition.Analysis element is carried out
Compare the analysis of information and produce an analysis output signal.
Image Sensor S includes multiple pixels sense cell Ss 1, and in schema multiple pixels sense cell Ss 1 quantity
Only illustrative purpose, the quantity of multiple pixels sense cell Ss 1 in schema is not only restricted to during implementation.When Image Sensor S be for
When detecting visible ray and setting, Fig. 2A, which illustrates pixels sense cell S 1, can include red R, green G and tri- kinds of sub-pixel senses of blue B
Unit is surveyed, red sub-pixel information, green sub-pixel information and blue sub-pixel corresponding to the visible ray generation of reception are believed respectively
Breath.In this instance, because green sub-pixel information is closer to human eye vision, so the judgement of environmental light brightness can be according to green secondary picture
Prime information is Main Basiss.But the invention is not limited in this；Other sub-pixel combinations also can be used such as in pixels sense cell S 1
CMYK ［ blue or green (Cyan), fuchsin (Magenta), yellow (Yellow), black (Black) ］, or arranged different from the RGB sub-pixels of diagram
Row mode, the judgement of environmental light brightness can be used as according to other sub-pixel information Main Basiss or according to average value, weighted value come
Calculate, etc..
Reference picture 3, wherein the image S2 for one embodiment of the invention（Such as, but not limited to visible image）Image
Block splits schematic diagram.Visible image S2 is produced from Image Sensor S, it is seen that has the imaging of multiple pixels in optical image S2
Cell S 21, and the divisible visible image S2 of image sampling element 21 is multiple image block S2B1.It is divided into multiple image areas
The mode of block is not limited to average segmentation shown in Fig. 3, lifts an application examples, refers to Fig. 3 A, it is seen that optical image S2 may
According to the difference of camera lens radial direction light transmittance can produce difference on imaging effect, thus can according to the specification of camera lens ratio segmentation visible ray
Multiple pixel imaging unit S21 on image S2, its partitioning scheme can be as shown in multiple image block S2B2 in Fig. 3 A.Image takes
Sample element 21 can carry out different adjustment to different images block S2B2 sample information respectively, or analysis element 22 can be to difference
Control information in image block S2B2 carries out different adjustment, the reference differences being so suitable in different images block and carry out
Adjust to reduce error.
Each image block can according to center, average value, weighting center of gravity, the various modes such as maximum are taken, to obtain a typical value,
This is foregoing sample information.And the functional operation value that information for example can be front and rear sample information is compareed, its simplest form
It is exactly difference.The basic value of computing for example can be brightness value but it is also possible to be other obtainable values.
In ambient light detection device 20 proposed by the invention, the analysis of control information of analysis element 22 and to produce an analysis defeated
Go out signal, or in addition to analysis of control information, still consider the other information that interactive apparatus can be provided in light of actual conditions（It is such as but unlimited
In the current use state of interactive apparatus, time, gravity, acceleration, angular speed etc.）, and produce analysis output signal.Analyze defeated
Going out signal such as, but not limited to may include a upset output signal, a proximity output signal, an ambient brightness output signal, proficiency
Gesture output signal, a device movement output signal or a device wave output signal etc., and can be made at present according to interactive apparatus
With state, selectivity determines.It is so-called upset output signal be represent install ambient light detection device 20 interactive apparatus whether
Upset；Proximity output signal is to have indicated whether object close to the interactive apparatus；Ambient brightness output signal is represented to ring
The detecting result of border brightness；Gesture output signal is to represent whether user relative to the interactive apparatus has done specific hand
Gesture；Device movement output signal is the moving direction and/or amount of movement for representing the interactive apparatus；Device waves output signal
Represent whether the interactive apparatus waves.These signals can be all used to provide user's information or manipulation to interactive apparatus
Function.
In detail, the self imaging sampling element 21 of analysis element 22 receives control information and judges to compare the dynamic range of information
Whether (Dynamic Range) changes, such as enters dark scope or vice versa by a bright scope, wherein bright scope and dark scope
Critical value setting can be set according to application demand.For example, when interactive apparatus is mobile phone or tablet PC, and analyze
The purpose of the analysis of control information of element 22 is to judge whether mobile phone or tablet PC overturn（That is, analysis output signal is upset
Output signal）When, after being overturn because of mobile phone possibly can not complete shading, and the shaded effect of tablet PC is preferable, so then sentences
The disconnected dark range set whether overturn, mobile phone should be loose compared with tablet PC.Again for example, when interactive apparatus is hand
Machine, and the purpose of the analysis of control information of analysis element 22 is when judging whether mobile phone overturns or press close to human ear（That is, analysis output
Signal is upset output signal or proximity output signal）When, because after mobile phone sticker person of modern times's ear possibly can not complete shading, and overturn hide
Light effect is preferable, so then judges whether to press close to the dark range set of human ear, and the dark range set that should relatively judge whether upset is
Loosely.So the critical value setting of bright scope and dark scope preferably adjusts with practical application, the susceptibility demand of generally dark scope
Higher, the susceptibility demand of bright scope is relatively low, can be using modes such as logarithmic functions come the bright scope of calibration during practical application
With dark scope.
How the analysis output signal that analysis element 22 is exported, facilitate user to manipulate interactive apparatus, illustrate
It is bright as follows.Fig. 4 is refer to, the schematic diagram of interactive apparatus turning operation is shown, wherein showing that interactive apparatus D device turns over
Turn direction F.One dark scope is entered by a bright scope when the judgement of analysis element 22 compares information, and can more consider other information in light of actual conditions（Example
Such as the time：It can determine whether after whether exceeding a scheduled time into dark scope by bright scope, and use state：It can determine whether interactive dress
The function of putting D location status or currently perform）, then produce the analysis output corresponding to interactive apparatus D state
Signal, in this example such as, but not limited to can be selective defeated to overturn output signal, proximity according to interactive apparatus D state
Go out signal or ambient brightness output signal.
In more detail, such as interactive apparatus D is a mobile phone, when its use state is, for example, that ringing sound of cell phone rings, analysis
Output signal is alternative to overturn output signal, and this for example represents that user is intended to ringing sound of cell phone switching to silent mode,
Or mobile phone refusal is answered.When mobile phone use state is in call mode, analysis output signal is alternative for proximity output news
Number, to detect whether such as user face is close to mobile phone, brightness of display screen can be reduced or switched off showing if being judged as YES
Screen, saves unnecessary waste of energy.In another example when use state is in display screen operation, analysis output signal alternative is ring
Border brightness output signal, this ambient brightness output signal show the change of ambient brightness according to the change of control information, shown
Display screen can adjust display brightness according to ambient brightness output signal, such as brightness of display screen is reduced in high-brightness environment to save
Electric energy is saved, brightness of display screen is lifted to increase identifiability etc. in low-light level environment.
Above according to use state, dynamic select produces corresponding analysis output signal, and this is preferable and nonessential；Point
The analysis output signal that analysis element 22 is exported also can be unrelated with interactive apparatus D use state.
Also, example provided above is judged according to brightness, but be not limited to must be with image entirety or block for sample information
Brightness is relevant.In another embodiment, image sampling element 21 can capture an at least image pointer conduct in visible image
Sample information, and control information is produced according to the image pointer of front and rear acquisition.Image pointer can be according to colour temperature, contrast, image line
Reason, particular color meet the image feature such as the pixel of specified conditions or the number of sub-pixel or shape to produce, and also may be used certainly
To be produced still according to brightness；Substantially, any mode can be used, in overall or a part of image, take one or more pixels
Or sub-pixel is used as and represented, and one or more pixels or sub-pixel or its result through certain computing, as image pointer.
Analysis element 22 also can produce analysis output signal according to from information is compareed caused by image pointer, and operating principle can be by foregoing
Analogize, will not be described here.
With reference to figure 5, Fig. 5 is the schematic diagram of display gesture operation, wherein showing an a hand H and preset instructions gesture T.
When hand H is moved in the range of Image Sensor S image capture, the image that Image Sensor S is captured will change
Become, that is, image pointer can change.Analysis element 22 judge the motion-vector of image pointer or motion track whether to meet one pre-
Can be a gesture output signal according to analysis output signal caused by it if instructing gesture T.Such as preset circular gesture and be represented as
The Jing Yin instruction of mobile phone, such as icon gesture is than standardized circle in front of the Image Sensor of mobile phone, when analysis element 22 is according to right
According to information（The interdependence of i.e. multiple sample informations, it is in this example the track of multiple image pointers）It is pre- to judge that gesture meets
If circular gesture when, just produce corresponding to analysis output signal（It is gesture output signal in this example）, and mobile phone can root
Closed according to the analysis output signal the tinkle of bells switch to it is Jing Yin.Certainly, it is also not necessarily limited to Jing Yin during practical application and can be any setting
Function, such as open mobile portable phone address book or locking touch control screen avoid by mistake by start etc., can optionally set.
With reference to figure 6, Fig. 6 is the schematic diagram of display device movement operation, wherein showing an interactive apparatus D and a device
Direction of motion M.When interactive apparatus D is moved, the image that Image Sensor S is captured changes therewith, that is, image pointer
It can change.Analysis element 22 judges whether the motion-vector of image pointer or motion track accord with combined into one apparatus movement instruction, according to it
Caused analysis output signal can be a device movement output signal.When device moved according to a specific direction (such as but not by
It is limited to the direction shown in Fig. 6), the image pointer that the image sensor S in interactive apparatus D is captured can be mobile and anti-with device
Direction is moved, and analysis element 22 can according to this judge and produce corresponding device movement output signal.This device movement output signal
Application may be, for example, to skip, start camera or specific function and open etc., can optionally set.Device movement output signal
With gesture output signal produced according to the change of image pointer, but device movement output signal is to be based on interactive apparatus
The movements of D in itself, and gesture output signal is the movement based on object in the image captured.If interactive apparatus D is originally
It is additionally provided with other sensors and interactive apparatus D can be distinguished and whether moved in itself, such as gravity, acceleration or angular-rate sensor
Deng, the then information that analysis element 22 can be provided according to these sensors, come judge be interactive apparatus D movements in itself or
It is the movement of object in captured image, generation device movement output signal or gesture output signal is answered to facilitate differentiation.But
As interactive apparatus D fails to provide such information, then the present invention is not also influenceed, it is only necessary to move gesture output signal and device
The corresponding image pointer variation track of output signal is set to different and is easy to differentiate, you can.
With reference to figure 7, Fig. 7 is the schematic diagram of display device swing operation, wherein display interactive apparatus D and a device shake
Put direction S；" waving " means that interactive apparatus rotates relative to a plane.Analysis element 22 judge the movement of image pointer to
Whether amount or motion track accord with combined into one apparatus and wave instruction, can be that a device waves output according to analysis output signal caused by it
Signal.When interactive apparatus D is waved, the image pointer that image sensor S is captured can be waved with device and opposite direction is waved,
Analysis element 22 can judge whether that generation device waves instruction according to this, or can also integrate interactive apparatus D can be provided it is other
Information carrys out comprehensive descision.The application that this device waves output signal may be, for example, skip, start camera, display specific character or
Specific function unlatching etc., can optionally set.Similar to foregoing, device wave output signal, device movement output signal and
Whether gesture output signal is all relevant with the change of image pointer, also all moved in itself with interactive apparatus D relevant；Therefore, if
Interactive apparatus D can provide other information to assist to judge, then analysis element 22 can take these information into account, but such as interaction
Formula device D fail to provide such information, then also do not influence the present invention, it is only necessary to by device wave output signal, device motion it is defeated
The corresponding image pointer variation track for going out signal and gesture output signal is set to different and is easy to differentiate, you can.
Illustrate the present invention for preferred embodiment above, it is simply described above, only make those skilled in the art easy
In understanding present disclosure, not it is used for limiting the interest field of the present invention.For those skilled in the art, when can be in this hair
It is bright spirit in, immediately think and various equivalence changes.For example, may be because of shadow when analysis element is analyzed control information
Time for exposure of picture and impact analysis result, and designer Ying Yi is using needing to obtain optimum value on the setting time for exposure.
In another example during applied to low resolution Image Sensor, the number of samples of required image must increase, to lift analysis element
Compare the reliability of information analysis.And the present invention is equally applicable for certainly in addition to the device for being applied to illustrate announcement
On other small-sized portable electronic equipments or on large-sized other devices.Therefore all concepts under this invention and spirit institute are for it
Equivalent change or modification, it all should be included in scope of the presently claimed invention.
Claims (16)
1. a kind of ambient light detection device, receive the visible ray from multiple different time points caused by an Image Sensor
Image, it is characterised in that the ambient light detection device includes：
One image sampling element, it is multiple image blocks for being connected to split the visible image to average segmentation or ratio,
Capture an at least sample information, and adopting according to corresponding to the visible image of front and rear acquisition respectively in those image blocks
Sample information, to produce a control information；And
One analysis element, produce to analyze the control information and analyze output signal corresponding to the one of institute's sense ambient light；
Wherein, the Image Sensor according to the ambient light to produce the visible image.
2. ambient light detection device as claimed in claim 1, wherein, the sample information is believed including an at least green sub-pixel
Breath, the image sampling element is according to the green sub-pixel information to produce the control information.
3. ambient light detection device as claimed in claim 1, wherein, the sample information according to the brightness of those image blocks and
Produce.
4. ambient light detection device as claimed in claim 1, wherein, the visible image includes multiple Pixel Informations and each
Pixel Information includes multiple sub-pixel information, and the sample information is according to the brightness of the visible image, colour temperature, contrast, image line
Reason, particular color meet the pixel of specified conditions or the number of sub-pixel or shape and produced.
5. ambient light detection device as claimed in claim 1, wherein, the ambient light detection device is installed in an interactive apparatus
In, and the analysis element produces the analysis output signal according to the control information and the use state of the interactive apparatus.
6. ambient light detection device as claimed in claim 1, wherein, the analysis output signal includes one below or more persons：
Overturn output signal, proximity output signal, ambient brightness output signal, gesture output signal, device movement output signal or dress
Put and wave output signal.
7. a kind of interactive apparatus, it is characterised in that include：
One provides the Image Sensor of the interactive apparatus camera function, and the Image Sensor according to ambient light producing
The image of multiple different time points；And
One ambient light detection device, it is multiple image blocks for being connected to split the image to average segmentation or ratio, at this
An at least sample information, and the sample information according to corresponding to the image of front and rear acquisition are captured in a little image blocks, to produce
One control information, and analyze the control information and produce and analyze output signal corresponding to the one of institute's sense ambient light.
8. interactive apparatus as claimed in claim 7, wherein, the image includes multiple Pixel Informations and each Pixel Information bag
Multiple sub-pixel information are included, the sample information is according to the brightness of the image, colour temperature, contrast, image texture, particular color or meets
The pixel of specified conditions or the number of sub-pixel or shape and produce.
9. interactive apparatus as claimed in claim 7, wherein, the Image Sensor includes multiple pixels sense units and every
One pixels sense unit includes multiple sub-pixel sensing units, and a visible image is produced to sense visible ray, and wherein
The sample information includes Pixel Information at least once.
10. interactive apparatus as claimed in claim 7, wherein, the ambient light detection device is according to the control information and the friendship
The use state of mutual formula device and produce the analysis output signal.
11. interactive apparatus as claimed in claim 7, wherein, the analysis output signal includes one below or more persons：Upset
Output signal, proximity output signal, ambient brightness output signal, gesture output signal, device movement output signal or device shake
Put output signal.
12. a kind of ambient light method for detecting, it is characterised in that include：
With the image sampling element in an interactive apparatus for photography, the shadow of multiple different time points is obtained according to ambient light
Picture；
An at least sample information is captured in the image；
According to those sample informations of front and rear acquisition, to produce a control information；And
The control information is analyzed, and produces the analysis output signal corresponding to institute's sense ambient light；
Wherein, the step of should capturing an at least sample information in the image, includes：Average segmentation or ratio split the image and are
The multiple image blocks being connected, and capture an at least sample information respectively in those image blocks.
13. ambient light method for detecting as claimed in claim 12, wherein, the image includes multiple Pixel Informations and each pixel
Information includes multiple sub-pixel information, and the sample information is according to the brightness of the image, colour temperature, contrast, image texture, particular color
Or meet the pixel of specified conditions or the number of sub-pixel or shape and produce.
14. ambient light method for detecting as claimed in claim 12, wherein, the analysis control information and produce analysis output
The step of signal, includes：The analysis output signal is produced according to the control information and the use state of the interactive apparatus.
15. ambient light method for detecting as claimed in claim 12, wherein, the analysis output signal includes one below or more
Person：Overturn output signal, proximity output signal, ambient brightness output signal, gesture output signal, device movement output signal,
Or device waves output signal.
16. ambient light method for detecting as claimed in claim 12, wherein, also include：Performed according to the analysis output signal
One function of the interactive apparatus.
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