CN101567167A - Portable electronic device and backlight control method thereof - Google Patents
Portable electronic device and backlight control method thereof Download PDFInfo
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- CN101567167A CN101567167A CNA2008100950456A CN200810095045A CN101567167A CN 101567167 A CN101567167 A CN 101567167A CN A2008100950456 A CNA2008100950456 A CN A2008100950456A CN 200810095045 A CN200810095045 A CN 200810095045A CN 101567167 A CN101567167 A CN 101567167A
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Abstract
The invention relates to a portable electronic device and a backlight control method thereof. The portable electronic device is provided with a display, a backlight module, an orientation sensor and an optical sensor. The backlight control method comprises the following steps: supplying backlight to the display through the backlight module; generating an orientation sensing signal through the orientation sensor according to the orientation of the portable electronic device in space; generating an optical sensing signal through the optical sensor according to light rays outside the portable electronic device; and opening or closing the backlight module according to the orientation sensing signal and the optical sensing signal.
Description
Technical field
The present invention relates to a kind of electronic installation, and particularly relate to a kind of portable electronic devices and method for controlling backlight thereof thereof.
Background technology
The development of portable electronic devices (for example mobile phone, personal digital assistant, mobile computer etc.) is maked rapid progress, the portable electronic devices of integrating multiple function is one of present main trend, yet, for avoiding the multi-functional portable electronic devices of user's long-time operation, and causing the power supply of portable electronic devices to exhaust fast, power management is very important problem.
With the mobile phone is example, and when mobile phone received an incoming call call request, the user need press and answer key to converse.When the user carries out highly being absorbed in or during the operation of harmony, for example drives or hand-held weight, this action that pushes button will cause user's inconvenience.
Therefore, be necessary to design a kind of portable electronic devices and method for controlling backlight thereof thereof, overcoming the problems referred to above, and can accurately judge user's pattern, and automatically close or open the backlight module of portable electronic devices.
Summary of the invention
Technical matters to be solved of the present invention is to provide a kind of portable electronic devices, during conversing the user, automatically closes or open the backlight module of portable electronic devices according to user's demand, to reach the effect of power saving.
Another object of the present invention is to provide a kind of method for controlling backlight thereof of portable electronic devices, it can automatically close or open the backlight module of portable electronic devices according to user's demand, with management system power supply effectively.
To achieve these goals, according to first preferred embodiment of the present invention, the present invention proposes a kind of portable electronic devices, and this portable electronic devices comprises display, backlight module, aspect sensor, optical sensor and processing unit.But the display video data, and backlight module can provide backlight to display.In addition, but the orientation of aspect sensor sensing portable electronic devices on the space, and produce an azimuth sensing signal according to the orientation.And, but optical sensor sensing portable electronic devices light from outside, and produce a light sensing signal according to light.Processing unit will be according to azimuth sensing signal and light sensing signal and is optionally opened or close backlight module.
To achieve these goals, according to second preferred embodiment of the present invention, the present invention also proposes a kind of method for controlling backlight thereof of portable electronic devices.This method for controlling backlight thereof can may further comprise the steps: provide backlight to display by backlight module; Afterwards, produce an azimuth sensing signal, and produce a light sensing signal by optical sensor by aspect sensor; Then, according to azimuth sensing signal and light sensing signal optionally to open or to close backlight module.
In addition, processing unit is closed after the backlight module, and aspect sensor produces another orientation sensing signal, and processing unit can be opened backlight module according to another orientation sensing signal.
In addition, according to the present invention's second preferred embodiment, when portable electronic devices receives an incoming call call request, aspect sensor produces an azimuth sensing signal, and producing a light sensing signal by optical sensor, portable electronic devices can automatically be accepted the incoming call call request according to this azimuth sensing signal and this light sensing signal.
Similarly, after automatically accepting the incoming call call request, aspect sensor produces another orientation sensing signal, and processing unit can be opened backlight module according to another orientation sensing signal.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
For above and other objects of the present invention, feature, advantage and embodiment can be become apparent, being described in detail as follows of appended accompanying drawing:
Fig. 1 is a kind of circuit block diagram according to the portable electronic devices of the present invention's first preferred embodiment;
Fig. 2 be according to the present invention's first preferred embodiment a kind of process flow diagram of method for controlling backlight thereof;
Fig. 3 is a kind of circuit block diagram according to the processing unit of the portable electronic devices of the present invention's first preferred embodiment;
Fig. 4 is a kind of circuit block diagram according to the portable electronic devices of the present invention's first preferred embodiment;
Fig. 5 is the another kind of process flow diagram according to the method for controlling backlight thereof of the present invention's first preferred embodiment;
Fig. 6 is a kind of process flow diagram according to the method for controlling backlight thereof of the present invention's second preferred embodiment;
Fig. 7 is a kind of vertical view according to the portable electronic devices of first and second preferred embodiment of the present invention.
[primary clustering symbol description]
10,40,70: portable electronic devices S
A: the azimuth sensing signal
11,75: aspect sensor S
A1: the acceleration sensing signal
12,42,72: optical sensor S
L, S
L1: the light sensing signal
14,44: processing unit S
A': digital azimuth sensing signal
15: backlight module S
L': the digital light sensing signal
17,47,73: display S
R: the incoming call call request
41: acceleration transducer S
C: backlight control signal
74: button S
O: judge signal
141: analog-digital converter
143: comparing component
145: the control signal generator
Embodiment
The backlight control apparatus of preferred embodiment of the present invention is to be used for portable electronic devices, and portable electronic devices is mobile phone, personal digital assistant, mobile computer etc. for example, below will be that example illustrates preferred embodiment of the present invention with the mobile phone.
For instance, user's desire is used mobile phone and before listening to incoming call, is needed to transfer mobile phone earlier so that the mobile phone loud-speaker opening is pressed close in one's ear.During conversing, user's desire is used mobile phone and when watching display, also needs earlier the transfer mobile phone so that the mobile phone loud-speaker opening is pulled away from one's ear to watch display.
When the user receives calls by mobile phone or watches the action of display, can detect mobile phone orientation spatially by the aspect sensor that is arranged on the mobile phone, and can detect the light quantity variation by being arranged on loud-speaker opening optical sensor on every side.Following preferred embodiment promptly designs according to these characteristics, is in which kind of pattern so that judge the user exactly, and opens or close the backlight module of display.
Fig. 1 is the circuit block diagram according to the portable electronic devices of the present invention's first preferred embodiment.In first embodiment, portable electronic devices can be a mobile phone 10.During the user conversed, mobile phone 10 can make telephonic exercises pattern and automatically cut out or open backlight module 15 according to the user, with management system power supply effectively, therefore can reduce non-essential electrical source consumption really.
Below azimuth sensing signal S will be described illustratively
AWith light sensing signal S
LProduction process.
For instance, receive incoming call call request S at portable electronic devices
RAfter, the user transfers mobile phone 10 and incoming call answering, and mobile phone 10 orientation spatially will change thereupon, but this moment, aspect sensor 11 sensing space orientation also produced azimuth sensing signal S accordingly
AIn addition, can for example be installed in the same side of mobile phone because of optical sensor 12 and loud-speaker opening, so when the loud-speaker opening of user's incoming call answering and mobile phone press close to the user in one's ear the time, mobile phone 10 light from outside intensity will reduce, but optical sensor 12 sensing extraneous lights also produce light sensing signal S accordingly
L, and processing unit 14 is just to orientation sensing signal S
AWith light sensing signal S
LCarry out signal Processing, to close backlight module 15.
Therefore, when user's incoming call answering, backlight module 15 can automatically be closed, to reduce the power consumption of non-essential system.
Fig. 2 is a kind of process flow diagram according to the method for controlling backlight thereof of the present invention's first preferred embodiment.Please also refer to Fig. 1 and Fig. 2, in step 211, mobile phone 10 receives an incoming call call request S who converses in order to request
RThe time, the user needs for example to accept this incoming call call request S by the key of pressing on the mobile phone 10 of answering
RAfter, could begin the operation of conversing.Be noted that receiving the incoming call call request is to have the different meaning of communicating by letter with accepting the incoming call call request for mobile phone, have in the technology of the present invention field and know that usually the knowledgeable should distinguishable this difference therebetween.
In step 213, for instance, when mobile phone 10 receives incoming call call request S
ROr the user accepts this incoming call call request S
RAfter, but processing unit 14 activation aspect sensors 11 and optical sensors 12, so that aspect sensor 11 and optical sensor 12 produce azimuth sensing signal S according to the dimensional orientation of mobile phone 10 and extraneous light respectively
AWith light sensing signal S
LAzimuth sensing signal S
ACan be for example corresponding to a plurality of orientation values, it is corresponding different reference coordinate respectively, and light sensing signal S
LCan be for example corresponding to a brightness value.In step 215, processing unit 14 will be differentiated a plurality of orientation values whether respectively in the location reference scope, and differentiate brightness value whether in the brightness number scope.Fall within this location reference scope for orientation values if differentiate the result, and brightness value falls within this brightness number scope, represent that then the user is just using mobile phone 10 and converses, so will in step 217, close backlight module 15.
Below the processing unit of first preferred embodiment will be described exemplarily.
Fig. 3 is a kind of circuit block diagram according to the processing unit of the portable electronic devices of the present invention's first preferred embodiment.Processing unit 14 comprises analog-digital converter 141, comparing component 143 and control signal generator 145.For to orientation sensing signal SA and light sensing signal S
LDifferentiate operation, analog-digital converter 141 convertible azimuth sensing signal S with simulation kenel
AWith light sensing signal S
LBe digital azimuth sensing signal S
A' and digital light sensing signal S
L'.Because azimuth sensing signal S
ACan be for example corresponding to a plurality of orientation values, and light sensing signal S
LCan be for example corresponding to a brightness value.Comparing component 143 will more a plurality of orientation values whether respectively in a stack orientations numerical range, and whether the comparison brightness value in the brightness number scope.If comparative result falls within this stack orientations numerical range for these orientation values, and brightness value falls within this brightness number scope, represents that then the user is just using mobile phone 10 and converses, and therefore will adopt control signal generator 145 to export backlight control signal S
CAnd close backlight module.
Be the portable electronic devices and the method for controlling backlight thereof that specifically describe first preferred embodiment of the present invention, the aspect sensor of first preferred embodiment of the present invention adopts for example acceleration transducer.
Fig. 4 is the another kind of circuit block diagram according to the portable electronic devices of the present invention's first preferred embodiment.Backlight control apparatus 40 comprises acceleration transducer 41, optical sensor 42 and processing unit 44.Acceleration transducer 41 is in order to produce acceleration sensing signal S
A1, optical sensor 42 can produce light sensing signal S
L1, and at mobile phone reception incoming call call request S
RThe time, processing unit 44 is just to acceleration sensing signal S
A1With light sensing signal S
L1Carry out a series of signal Processing, to judge whether to need to pass through backlight control signal S
CAnd close or open backlight module 45.
Yet according to first preferred embodiment of the present invention, acceleration transducer 41 also can adopt gyroscope and replace, and processing unit 44 can for example adopt central processing unit or microprocessor, and (microprocessor MCU) and specifically implements.
Fig. 5 is the another kind of process flow diagram according to the method for controlling backlight thereof of the present invention's first preferred embodiment.Please also refer to Fig. 4 and Fig. 5, in step 51, mobile phone receives an incoming call call request, and the user accepts this incoming call call request by the key of pressing on the mobile phone of answering.In step 52, processing unit 44 activation acceleration transducers 41 and optical sensor 42 are so that acceleration transducer 41 produces acceleration sensing signal S respectively with optical sensor 42
A1With light sensing signal S
L1, and provide it to processing unit 44 and process.In step 53, processing unit 44 will be according to acceleration sensing signal S
A1With light sensing signal S
LAnd differentiation user's pattern.For instance, according to acceleration sensing signal S
A1With light sensing signal S
LCan distinguish three kinds of users' pattern, be respectively that the left ear of judging the user is pressed close to mobile phone (step 541), judged that user's auris dextra presses close to mobile phone (step 542) or judge that the user is just watching the display (step 543) of display.Press close to mobile phone if judge user's left ear, or judge that user's auris dextra presses close to mobile phone, can know the action that the user is just carrying out incoming call answering by inference, then in step 55, backlight module 45 is closed.Watch the action of display if judge the user, then in step 56, backlight module 45 is opened.
When backlight module after step 55 is closed, if the user is during the incoming call conversation, be converted to the action of watching display by the action of original incoming call answering, then acceleration transducer 41 another acceleration sensing signals of output.Processing unit 44 will carry out a succession of signal Processing to this another acceleration sensing signal, and to open backlight module, thus, the user just can watch the shown data of display.In first preferred embodiment, another light sensing signal that optionally adopts optical sensor 42 to be exported is with the foundation that whether need open backlight module as differentiation.
Afterwards, in step 57, differentiate the user and whether just converse,, then get back in the step 52, receive constantly respectively from the acceleration sensing signal S of acceleration transducer 41 with optical sensor 42 if the user still converses
A1With light sensing signal S
L1, and processing unit 44 is according to acceleration sensing signal S
A1With light sensing signal S
L1And carry out follow-up signal Processing operation.If the user has finished conversation, then no longer activation acceleration transducer 41 and optical sensor 42.
According to first preferred embodiment of the present invention, when the user in communication process, carry out watching for several times the action of display, then backlight module will automatically be opened, in case and when user then the action of answering, backlight module will automatically be closed, therefore, and management system power supply and reach the effect of power saving simultaneously effectively.
The signal that below will be described more specifically the different pattern of user is differentiated operation.
For instance, for differentiating the action whether user is just listening to exactly, at first for example obtain user's left side ear or auris dextra and press close to the three-dimensional coordinate signal that the loudspeaker brief acceleration sensor of mobile phone is produced.The three-dimensional coordinate signal is corresponding to three stack orientations numerical value, and it comprises X coordinate, Y coordinate and Z coordinate.If X coordinate, Y coordinate and Z coordinate fall within respectively in three groups of preset bearing numerical ranges, then can judge the action that the user is just answering, and close the backlight module of mobile phone.
Similarly, for differentiating the action whether user is just watching display exactly, at first obtain the three-dimensional coordinate signal that action brief acceleration sensor that the user watches the display on the mobile phone is produced.The three-dimensional coordinate signal is corresponding to three stack orientations numerical value, and it comprises X coordinate, Y coordinate and Z coordinate.If X coordinate, Y coordinate and Z coordinate fall within respectively in three groups of preset bearing numerical ranges, then can judge the action that the user is just watching display, and open the backlight module of mobile phone.
In addition, differentiate action that the user just answering or the action of watching display for adopting the light sensing signal, draw one first predetermined luminance numerical range and one second predetermined luminance numerical range after concluding at first by analysis, if the pairing brightness value of light sensing signal falls within the first predetermined luminance numerical range, then judge the action that the user is just answering, and close backlight module.Otherwise, fall within second group of predetermined luminance numerical range if differentiate the pairing brightness value of light sensing signal, judge that then the user is just watching mobile phone, and open backlight module.
By the present invention's first preferred embodiment as can be known, the backlight control apparatus of the present invention's first preferred embodiment and method can be according to acceleration sensing signal and light sensing signals and are judged user's pattern, and automatically close or open the backlight module of portable electronic devices, to reach the effect of saving electric energy.
On the other hand, according to the present invention's second preferred embodiment, if mobile phone receives an incoming call call request, the then action that only needs the user to answer, mobile phone can just automatically be accepted the call request of sending a telegram here according to the azimuth sensing signal with the light sensing signal.Thus, the user need not press and answer key, the operation of can conversing.
The thin portion flow process of the present invention's second preferred embodiment below will be described in detail in detail.
Fig. 6 be according to the present invention's second preferred embodiment a kind of process flow diagram of method for controlling backlight thereof.Please also refer to Fig. 4 and Fig. 6, in step 61, processing unit 44 receives an incoming call call request SR.Afterwards, in step 62, processing unit 44 activation acceleration transducers 41 and optical sensor 42 are so that acceleration transducer 41 produces acceleration sensing signal S respectively with optical sensor 42
A1With light sensing signal S
L1, and provide it to processing unit 44 and process.Then, in step 63, processing unit 44 will be judged acceleration sensing signal S respectively
A1Whether pairing orientation values falls within the preset bearing numerical range, and light sensing signal S
L1Whether pairing brightness value falls within the predetermined luminance numerical range.
In step 63, if judged result is that orientation values falls within the preset bearing numerical range, and brightness value falls within the predetermined luminance numerical range, represents that then the user desires the received communication request, therefore the call request of sending a telegram here will automatically be accepted, to make things convenient for user's incoming call answering (step 64).
According to the present invention's second preferred embodiment, during conversing, mobile phone can cut out or open backlight module with the different patterns that the user carried out equally.That is to say that in step 65, processing unit 44 will receive another acceleration sensing signal and another light sensing signal, and follow in step 66, differentiate user's pattern.If processing unit 44 judges that the user presses close to mobile phone, then close backlight module 45 (step 671,681).If judge that the user is just watching display, then open backlight module 45 (step 672,682).Then, in step 69, confirm whether the user just converses, if the user just converses, then processing unit 44 will receive an acceleration sensing signal once more with a light sensing signal again and differentiate operation again in step 65, optionally to open or to close backlight module.
By the present invention's second preferred embodiment as can be known, the method for controlling backlight thereof that adopts the present invention's second preferred embodiment also can be judged user's pattern according to acceleration sensing signal and light sensing signal, and automatically close or open the backlight module of portable electronic devices, to reach the effect of saving electric energy.
Fig. 7 is a kind of vertical view according to the portable electronic devices of first and second preferred embodiment of the present invention.Mobile phone 70 comprises loud-speaker opening 71, optical sensor 72, display 73, button 74 and aspect sensor 75, and aspect sensor 75 can be arranged on the below of mobile phone 70.During the user converses, but the dimensional orientation of optical sensor 72 and aspect sensor 75 sensing mobile phones 70 and extraneous light and produce light sensing signal and azimuth sensing signal respectively, with as the foundation of opening or closing the backlight module (not shown) of display 73, so that system power supply is effectively managed.
By first and second preferred embodiment as can be known, backlight control apparatus and the method for using portable electronic devices of the present invention has following advantage:
1. adopt portable electronic devices of the present invention and method for controlling backlight thereof thereof, can be according to the azimuth sensing signal of corresponding user's various demands and light sensing signal and automatically close or open the backlight module of portable electronic devices, with management system power supply effectively and reach the effect of power saving simultaneously.
2. adopt portable electronic devices of the present invention and the method for controlling backlight thereof thereof can be when receiving the incoming call call request, the action that the user only need answer, for example, portable electronic devices is moved on in one's ear, can be under the situation that does not need the press-to-talk key automatically receive the call request of sending a telegram here according to the azimuth sensing signal with the light sensing signal this moment, to make things convenient for user's incoming call answering.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and modification according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (12)
1, a kind of portable electronic devices is characterized in that, it comprises:
One display is in order to video data;
One backlight module is in order to provide backlight to this display;
One aspect sensor in order to this portable electronic devices of sensing orientation spatially, and produces an azimuth sensing signal according to this orientation;
One optical sensor in order to a light of this portable electronic devices outside of sensing, and produces a light sensing signal according to this light; And
One processing unit is in order to according to this azimuth sensing signal and this light sensing unblanking or close this backlight module.
2, portable electronic devices according to claim 1, it is characterized in that, this azimuth sensing signal is corresponding at least one orientation values, and this light sensing signal is corresponding to a brightness value, and this processing unit is according to this at least one orientation values and the unlatching of this brightness value or close this backlight module.
3, portable electronic devices according to claim 2, it is characterized in that, whether this processing unit also reaches this brightness value whether in a second value scope in order to differentiate this at least one orientation values in one first numerical range, if this at least one orientation values reaches this brightness value in this second value scope in this first numerical range, then this backlight module is opened or closed to this processing unit.
4, portable electronic devices according to claim 3, it is characterized in that, when this portable electronic devices is accepted an incoming call call request, and this at least one orientation values reaches this brightness value in this second value scope the time in this first numerical range, and this processing unit is closed this backlight module.
5, portable electronic devices according to claim 4, it is characterized in that, after this processing unit was closed this backlight module, this aspect sensor produced another orientation sensing signal, and this processing unit is opened this backlight module according to this another orientation sensing signal.
6, portable electronic devices according to claim 1 is characterized in that, when this portable electronic devices received an incoming call call request, processing unit was accepted this incoming call call request according to this azimuth sensing signal and this light sensing signal.
7, portable electronic devices according to claim 1 is characterized in that, this aspect sensor is an acceleration transducer.
8, a kind of method for controlling backlight thereof is used for a portable electronic devices, it is characterized in that, this portable electronic devices has a display, a backlight module, an aspect sensor and an optical sensor, and this method comprises at least:
Provide backlight by this backlight module to this display;
Produce an azimuth sensing signal by this aspect sensor, and produce a light sensing signal by this optical sensor; And
According to this azimuth sensing signal and this light sensing signal to open or to close this backlight module.
9, method according to claim 8 is characterized in that, also comprises:
Differentiate the pairing at least one orientation values of this azimuth sensing signal whether in one first numerical range;
Differentiate the pairing brightness value of this light sensing signal whether in a second value scope; And
If this at least one orientation values reaches this brightness value in this second default value scope in this first numerical range, then open or close this backlight module.
10, method according to claim 9 is characterized in that, also comprises:
When this portable electronic devices is accepted an incoming call call request, and this at least one orientation values reaches this brightness value in this second default value scope the time in this first numerical range, closes this backlight module.
11, method according to claim 10 is characterized in that, also comprises:
After this backlight module is closed, produce another orientation sensing signal by this aspect sensor; And
According to this another orientation sensing signal, open this backlight module.
12, method according to claim 8 is characterized in that, when also being included in this portable electronic devices reception one incoming call call request, accepts this incoming call call request according to this azimuth sensing signal and this light sensing signal.
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| CNA2008100950456A CN101567167A (en) | 2008-04-23 | 2008-04-23 | Portable electronic device and backlight control method thereof |
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|---|---|---|---|
| CNA2008100950456A CN101567167A (en) | 2008-04-23 | 2008-04-23 | Portable electronic device and backlight control method thereof |
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Application publication date: 20091028 |