CN104183224B - The detecting and controlling system of LCD screen light on and off state and its detection control method - Google Patents
The detecting and controlling system of LCD screen light on and off state and its detection control method Download PDFInfo
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- CN104183224B CN104183224B CN201410396639.6A CN201410396639A CN104183224B CN 104183224 B CN104183224 B CN 104183224B CN 201410396639 A CN201410396639 A CN 201410396639A CN 104183224 B CN104183224 B CN 104183224B
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Abstract
The invention discloses the detecting and controlling system of LCD screen light on and off state and its detection control method, Infrared is launched by infrarede emitting diode, and the light of shelter reflection is received by photodiode, again whether whole reflection lights can be received by ambient light detection ADC sense photodiode, if photodiode can receive whole reflection lights, the reflection light of reception is converted into digital signal and is stored in data register；Simultaneously, detect the distance of shelter and proximity transducer by distance detection ADC, and be converted into digital signal and be stored in data register, if photodiode can not receive whole reflection lights, the launch angle of infrarede emitting diode is then adjusted by calibration module, photodiode is enable to receive whole reflection lights such that it is able to correctly detect the distance between shelter and proximity transducer, the correct light on and off state controlling LCD screen.
Description
Technical field
The present invention relates to the control to LCD screen light on and off state, particularly to a kind of detection control system of LCD screen light on and off state
System and its detection control method.
Background technology
Proximity transducer played an important role during the call of the intelligent mobile terminals such as mobile phone, in communication process
In, when ear pressed close to by mobile phone, proximity transducer detects signal, notifies central processing unit to control LCD screen to extinguish, leaves in mobile phone
Ear（During as opened hands-free mode）When, notify central processing unit to light LCD screen, so can not only reduce mobile phone in call
Power consumption, and the temperature of LCD screen can be reduced.But if proximity transducer can not play a role, in call, LCD screen can be located always
In lighting, lead to the temperature of LCD screen can rise, reduce the service life of LCD screen, and cell-phone heating is also more severe.
Above-mentioned problem is when mobile phone communication, if proximity transducer loses effect, now by black shelter edge
When the position that touch screen shifts to proximity sensor of mobile phone, the LCD screen of mobile phone will not be extinguished, and lead to LCD screen temperature to raise, reduce
The service life of mobile phone.
Content of the invention
A kind of in view of in place of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide inspection of LCD screen light on and off state
Survey control system and its detection control method, proximity transducer can be enable to receive instead when shelter is close proximity to sensor
Penetrate light, the correct effect playing proximity transducer.
In order to achieve the above object, this invention takes technical scheme below：
A kind of detecting and controlling system of LCD screen light on and off state, it includes：Proximity transducer, calibration module and central authorities are processed
Device；
Described proximity transducer includes：
Infrarede emitting diode, for launching Infrared；
Photodiode, for receiving the light of shelter reflection；
Ambient light detects ADC, whether can receive whole reflection lights for sense photodiode, and will connect
The reflection light receiving is converted into digital signal and is stored in data register；
Distance detection ADC, for detecting the distance of shelter and proximity transducer, and is converted into digital signal storage
In data register；
Described data register, detects ADC and the testing result of distance detection ADC for storage environment light；
Command register, for interrupting central processing unit when data register has deposited data so as to response is close to biography
The testing result of sensor, and control the light on and off state of LCD screen according to testing result；
Described calibration module, for when photodiode does not receive or can only receive part reflection light, adjusting
The launch angle of whole infrarede emitting diode, enables photodiode to receive the light of shelter reflection；
Described calibration module includes：
Angle arranging unit, for when photodiode can not receive whole reflection lights, arranging Infrared
After the thing that is blocked reflection, the launch angle that can fall all the time in the range of the receiving angle of photodiode；
Angle scanning unit, the launching light of the infrarede emitting diode for being arranged by pulse scanning angle arranging unit
Line is reflected in the state in the range of photodiode receiving angle, and scanning result is fed back to angle correcting unit；
Angle correcting unit, for when reflection light deviates receiving angle scope, by correcting angle arranging unit pair
The setting of launch angle, make transmitting light be blocked thing reflection after fall in the range of the receiving angle of photodiode.
In the described detecting and controlling system of LCD screen light on and off state, described distance detection ADC, it is additionally operable in photoelectricity
When diode does not receive reflection light, the distance between detection shelter and proximity transducer, and it is single to feed back to angle setting
Unit；
Described angle arranging unit, is additionally operable to according to described distance, carries out reflection light and rotates to photodiode direction
Launch angle setting；
Described angle scanning unit, is additionally operable to the rotational angle of scanning angle arranging unit setting, and the result by scanning
Feed back to described angle correcting unit；
Described angle correcting unit, is additionally operable to the reflection light after angle arranging unit is arranged and deviates photodiode
During receiving angle scope, the rotational angle of correction angle arranging unit, so that reflection light is fallen in the receiving angle of photodiode
In the range of.
In the described detecting and controlling system of LCD screen light on and off state, described infrarede emitting diode launches Infrared
The angle of departure is less than the acceptance angle that photodiode receives reflection light.
In the described detecting and controlling system of LCD screen light on and off state, described shelter is black shelter.
A kind of detection control method of the detecting and controlling system of LCD screen light on and off state described above, it includes：
A, launched Infrared by infrarede emitting diode, and receive the light of shelter reflection by photodiode；
B, by ambient light detection ADC sense photodiode whether can receive whole reflection lights；If it is,
Then execution step C；Otherwise, execution step D；
C, the reflection light receiving is converted into digital signal it is stored in data register；Meanwhile, by distance detection
ADC detects the distance of shelter and proximity transducer, and is converted into digital signal and is stored in data register, afterwards again
Execution step E；
D, when photodiode do not receive or can only receive partial occlusion thing reflection light when, by calibration module
The launch angle of adjustment infrarede emitting diode, enables photodiode to receive whole reflection lights, afterwards execution step again
E；
E, when data register deposit ambient light detect ADC and distance detection ADC detection data when,
The testing result that central processing unit responds proximity transducer is interrupted by command register, and LCD screen is controlled according to testing result
Light on and off state.
In described detection control method, described step D specifically includes：
D1, when photodiode can not receive whole reflection lights, by angle arranging unit arrange Infrared
After the thing that is blocked reflection, the launch angle that can fall all the time in the range of the receiving angle of photodiode；
D2, angle scanning unit pass through the transmitting light of the infrarede emitting diode of pulse scanning angle setup module setting
It is reflected in the state in the range of photodiode receiving angle, and scanning result is fed back to angle correcting unit；
D3, angle correcting unit reflection light deviate receiving angle scope when, by transmitting light reflection angle
Setting, make transmitting light be blocked thing reflection after fall in the range of the receiving angle of photodiode.
In described detection control method, when the launch angle that infrarede emitting diode launches Infrared is less than its maximum
During the angle of departure, described step B specifically includes：
B1, when detection transmitting the light leftmost side light fall in the leftmost side of photodiode range of receiving when, judge send out
Penetrate the light that light deducts transmitting in the range of launch angle in described launch angle to maximum emission angle, can be all by photoelectricity two
Pole pipe receives, execution step C afterwards；
B2, when detection transmitting the light leftmost side light fall in photodiode range of receiving when it is impossible to judge transmitting
Whether light can all be received by photodiode；Execution step D1 afterwards；
B3, when detection transmitting the light rightmost side light fall in the rightmost side of photodiode range of receiving when, judge energy
All received by photodiode, afterwards execution step C.
In described detection control method, described step D specifically includes：
D1 ', when ambient light detection ADC sense photodiode do not receive reflection light when, distance detection ADC mould
The distance between block detection shelter and proximity transducer, and feed back to angle arranging unit；
D2 ', by angle arranging unit according to described distance, carry out the transmitting that reflection light rotates to photodiode direction
The setting of angle；
D3 ', the angle of the rotation being arranged by angle scanning unit scan angle arranging unit, and the result that will scan is anti-
Feed described angle correcting unit；
When D4 ', the reflection light after the setting of angle arranging unit deviate the receiving angle scope of photodiode, correction
The rotational angle of angle arranging unit, makes reflection light fall in the range of the receiving angle of photodiode.
In described detection control method, when the launch angle that infrarede emitting diode launches Infrared is equal to its maximum
During the angle of departure, described step B specifically includes：
B1 ', when detection transmitting the light rightmost side light fall in photodiode range of receiving when it is impossible to judge transmitting
Whether light can all be received by photodiode；Execution step D1 afterwards；
B2 ', when detection transmitting the light rightmost side light fall the leftmost side in photodiode range of receiving when, or
When the light of the detection transmitting light leftmost side falls the rightmost side in photodiode range of receiving, then judge transmitting light not
Can be received by photodiode；Execution step D1 ' afterwards；
B3 ', when detection transmitting the light rightmost side light fall in the rightmost side of photodiode range of receiving when, judge energy
All received by photodiode, afterwards execution step C.
The detecting and controlling system of LCD screen light on and off state providing compared to prior art, the present invention and its detection controlling party
Method, launches Infrared by infrarede emitting diode, and receives, by photodiode, the light that shelter reflects, then by environment
Whether light detection ADC sense photodiode can receive whole reflection lights, if photodiode can receive
Whole reflection lights, then be converted into digital signal by the reflection light of reception and be stored in data register；Meanwhile, by distance
Detect that ADC detects the distance of shelter and proximity transducer, and be converted into digital signal and be stored in data register, such as
Fruit photodiode can not receive whole reflection lights, then adjust the angle of departure of infrarede emitting diode by calibration module
Degree, enables photodiode to receive whole reflection lights such that it is able to correctly detect between shelter and proximity transducer
Distance, the correct light on and off state controlling LCD screen, so that LCD screen is extinguished, so as to reduce shifting when not needing the bright LCD screen of main points
The power consumption of dynamic terminal, reduces LCD screen heating, extends the service life of mobile terminal.
Brief description
Fig. 1 is the structured flowchart of the detecting and controlling system of LCD screen light on and off state of the present invention.
Fig. 2 is in the detecting and controlling system of LCD screen light on and off state of the present invention, and the light of infrarede emitting diode transmitting is hidden
The parameter that block material reflexes to photodiode reception defines schematic diagram.
Fig. 3 is the flow chart of the detection control method of detecting and controlling system of LCD screen light on and off state of the present invention.
Fig. 4 is in the detection control method of the present invention, when photodiode can not receive whole reflection lights, step
The particular flow sheet of rapid S400.
Fig. 5 is in the detection control method of the present invention, when the launch angle of infrarede emitting diode transmitting Infrared is little
When its maximum emission angle, the particular flow sheet of step S200.
Fig. 6 is in the detection control method of the present invention, when photodiode does not receive any reflection light, step
The particular flow sheet of S400.
Fig. 7 is in the detection control method of the present invention, when infrarede emitting diode launches launch angle of Infrared etc.
When its maximum emission angle, the particular flow sheet of step S200.
Specific embodiment
The present invention provides a kind of detecting and controlling system of LCD screen light on and off state and its detection control method, for making the present invention
Purpose, technical scheme and effect clearer, clear and definite, the embodiment that develops simultaneously referring to the drawings is to the present invention further specifically
Bright.It should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The proximity transducer of mobile terminal when black shelter moves along touch screen and covers, proximity transducer red
The infrared light thing that can not be blocked of UV light-emitting diode transmitting reflexes on the photodiode of proximity transducer.Proximity transducer
When not receiving data, proximity transducer is not worked it is impossible to be carried out data transmission with central processing unit, in call, mobile whole
The LCD screen at end is constantly in bright state.
Above-mentioned situation is because the light of the infrarede emitting diode transmitting of the proximity transducer thing that can not be blocked reflexes to and connects
On the photodiode of nearly sensor, then the light of the infrarede emitting diode transmitting of shelter reflection has had deviated from photoelectricity two pole
Pipe receives the scope of light.Because shelter can cover the whole proximity transducer of mobile terminal, then there is not infraluminescence
The light of diode emitter deviates shelter, and the situation of make shelter can not reflex to light that this is partially away from.
Refer to Fig. 1, the detecting and controlling system of the LCD screen light on and off state that the present invention provides includes：Proximity transducer 10, school
Quasi-mode block 20 and central processing unit 30, described proximity transducer 10 connects calibration module 20 and central processing unit 30, described central authorities
Processor 30 is used for correctly controlling the light on and off state of LCD screen according to the distance of shelter and proximity transducer 10.
, described proximity transducer 10 is arranged near handset touch panel, works as human ear taking mobile phone as a example（I.e. shelter）Make near
During touch screen, central processing unit 30 makes LCD screen extinguish, and prevents mobile phone false triggering, when human ear is away from touch screen, central processing unit
30 make LCD screen light, and allow users to operating handset.
When being embodied as, described proximity transducer 10 includes：Infrarede emitting diode 101, photodiode 102, environment
Light detection ADC 103, distance detection ADC 104, data register 105 and command register 106.
Wherein, infrarede emitting diode 101 is used for launching Infrared, and described photodiode 102 blocks for reception
The light of thing reflection.
By ambient light, described photodiode 102 detects that ADC 103 and distance detection ADC 104 connect respectively
Data register 105.It is whole whether described ambient light detection ADC 103 can receive for sense photodiode 102
Reflection light, and the reflection light receiving is converted into digital signal is stored in data register 105.Described distance detection
ADC 104 is used for detecting the distance of shelter and proximity transducer 10, and is converted into digital signal and is stored in data register
In 105.Therefore, described data register 105 is used for storage environment light detection ADC 103 and distance detection ADC 104
Testing result.
Described data register 105 connects central processing unit 30 by I2C bus, by I2C bus and central processing unit
Carry out data transmission between 30.Described command register 106 connects calibration module 20, data register 105 and central processing unit
30, for interrupting central processing unit 30 when data register 105 deposits data so as to respond the detection of proximity transducer 10
As a result, and according to testing result control the light on and off state of LCD screen, such as shelter makes LCD screen in the range of proximity transducer 5CM
Extinguish, light LCD screen more than 5CM.
Described calibration module 20 is used for not receiving in photodiode 102 or can only receive part reflection light
When, the launch angle of adjustment infrarede emitting diode 101, enable photodiode 102 to receive the light of shelter reflection.Its
In, the mode that calibration module 20 adjusts the launch angle of infrarede emitting diode 101 includes arranging launch angle size and rotation
The angle of departure.
Please continue to refer to Fig. 1, described calibration module 20 includes angle arranging unit 201, angle scanning unit 202 and angle
Correction unit 203, described angle arranging unit 201 link order depositor 106, infrarede emitting diode 101, angle scanning list
Unit 202 and angle correcting unit 203, described angle scanning unit 202 connection angle corrects unit 203.
Wherein, angle arranging unit 201 is used for, when photodiode 102 can not receive whole reflection lights, connecing
The Infrared of instruction setting infrarede emitting diode 101 transmitting being sent by command register 106 is blocked after thing reflection,
The launch angle that can fall all the time in the range of the receiving angle of photodiode 102, that is, to needed for infrarede emitting diode 101
Launch angle is configured.
Described angle scanning unit 202 is used for infraluminescence two pole by pulse scanning angle arranging unit 201 setting
The transmitting light of pipe 101 is reflected in the state in the range of photodiode 102 receiving angle, and scanning result is fed back to
Angle correcting unit 203.
Described angle correcting unit 203 is used for when reflection light deviates receiving angle scope, by correcting angle setting
The setting to launch angle for the unit 201, make transmitting light be blocked thing reflection after fall in the receiving angle model of photodiode 102
In enclosing, make shelter near touch screen when, photodiode 102 can receive whole reflection lights.
Due to when shelter is close proximity to sensor 10 it is possible to photodiode 102 occur can not receive reflected light
Line leads to the state that LCD screen is lighted always, and in further embodiment, described distance detection ADC 104 is additionally operable in photoelectricity
When diode 102 does not receive reflection light, detection the distance between shelter and proximity transducer 10, and feed back to angle and set
Put unit 201.
Described angle arranging unit 201 is additionally operable to according to described distance, carries out reflection light to photodiode 102 direction
The setting of the launch angle rotating, the angle of departure of infrarede emitting diode 101 will rotate certain angle so as to transmitting light
Can all be received by photodiode 102 after the thing that is blocked reflection.
Described angle scanning unit 202 be additionally operable to scanning angle arranging unit 201 setting rotational angle, and by scanning
Result feeds back to described angle correcting unit 203.Described angle correcting unit 203 is additionally operable to arrange in angle arranging unit 201
When reflection light afterwards deviates the receiving angle scope of photodiode 102, the rotational angle of correction angle arranging unit 201,
Reflection light is made to fall in the range of the receiving angle of photodiode 102.
In the embodiment of the present invention, described shelter is black shelter, such as the hair of people, described infrarede emitting diode
The angle of departure of 101 transmitting Infrared is less than the acceptance angle that photodiode 102 receives reflection light, makes under normal circumstances, red
UV light-emitting diode 101 transmitting Infrared can all be received by photodiode 102.
See also Fig. 2 it is assumed that the ultrared angular range that infrarede emitting diode 101 is transmitted on shelter is
A, sets the leftmost light of light that infrarede emitting diode 101 is transmitted on shelter as L1a, infrarede emitting diode simultaneously
The rightmost light of 101 light being transmitted on shelter is L2a.Photodiode 102 can receive the angular range of light
It is set to b, the reception light angle scope of photodiode 102 is more than the angle model that infrarede emitting diode 101 launches light
Enclose, that is, angle b is more than angle a, set the leftmost light of light that photodiode 102 receives shelter reflection simultaneously（I.e.
Infrarede emitting diode 101 is transmitted on shelter, the leftmost light of light of the thing that is blocked reflection）For L1b, at this moment block
Thing reflects this light and is easiest in the angular range of photodiode 102 receiving light, is all connect by photodiode 102
Receive；And photodiode 102 receives the rightmost light of the light of shelter reflection（I.e. infrarede emitting diode 101
It is transmitted on shelter, the rightmost light of light of the thing that is blocked reflection）For L2b.
In mode shown in Fig. 2, if the transmitting light leftmost light L1a of infrarede emitting diode 101 output
Fall on L1b, and because angle a is less than angle b, then the transmitting light of infrarede emitting diode 101 output reflects through shelter
After can all be received by photodiode 102.Accordingly, if the transmitting light rightmost of infrarede emitting diode 101 output
Light L2a fall on L2b, and due to angle a be less than angle b, then infrarede emitting diode 101 output transmitting light through hide
Can all be received by photodiode 102 after block material reflection.If the transmitting light Far Left of infrarede emitting diode 101 output
Light L1a or rightmost light L2a fall in the range of angle b, and due to angle a be less than angle b, now, infrared
Optical diode 101 transmitting light through shelter reflection after it is impossible to judge whether all to be received by photodiode 102, this
When central processing unit 30 LCD screen can be made to light always, now proximity transducer loses effect.If infrarede emitting diode
The transmitting light leftmost light L1a of 101 outputs falls on L2b after shelter reflection, or rightmost light L2a warp
Fall on L1b after shelter reflection, then, now photodiode 102 does not receive reflection light, now central processing unit 30 meeting
LCD screen is made to light always, proximity transducer loses effect.
The present invention correspondingly provides a kind of detection control method of the detecting and controlling system of above-mentioned LCD screen light on and off state, please
Refering to Fig. 3, described detection control method includes：
S100, launched Infrared by infrarede emitting diode, and receive the light of shelter reflection by photodiode
Line；
S200, by ambient light detection ADC sense photodiode whether can receive whole reflection lights；If
It is, then execution step S300；Otherwise, execution step S400；
S300, the reflection light receiving is converted into digital signal it is stored in data register；Meanwhile, by distance inspection
Survey the distance that ADC detects shelter and proximity transducer, and be converted into digital signal and be stored in data register, afterwards
Execution step S500 again；
S400, when photodiode does not receive or can only receive the light of partial occlusion thing reflection, by calibrating
Module adjusts the launch angle of infrarede emitting diode, enables photodiode to receive whole reflection lights, executes afterwards again
Step S500；
S500, when data register deposit ambient light detect ADC and distance detection ADC detection data
When, the testing result that central processing unit responds proximity transducer is interrupted by command register, and LCD screen is controlled according to testing result
Light on and off state.
In the detection control method of the present invention, it is right to need when photodiode can not receive whole reflection lights
The light of infraluminescence two pole chief of breech is corrected, as shown in figure 4, described step S400 specifically includes：
S401, when photodiode can not receive whole reflection lights, by angle arranging unit arrange infrared light
Line is blocked after thing reflection, the launch angle that can fall all the time in the range of the receiving angle of photodiode；
S402, angle scanning unit pass through the launching light of the infrarede emitting diode of pulse scanning angle arranging unit setting
Line is reflected in the state in the range of photodiode receiving angle, and scanning result is fed back to angle correcting unit；
S403, angle correcting unit reflection light deviate receiving angle scope when, by transmitting light angle of reflection
Degree setting, make transmitting light be blocked thing reflection after fall in the range of the receiving angle of photodiode.
Launch angle due to infrarede emitting diode can be arranged by angle arranging unit, when infrarede emitting diode is sent out
When the launch angle penetrating Infrared is less than its maximum emission angle, refer to Fig. 5, described step S200 specifically includes：
S201, when detection transmitting the light leftmost side light fall in the leftmost side of photodiode range of receiving when, judge
Transmitting light deducts the light of transmitting in the range of launch angle in described launch angle to maximum emission angle, can be all by photoelectricity
Diode receives, execution step S300 afterwards；
S202, when detection transmitting the light leftmost side light fall in photodiode range of receiving when it is impossible to judge send out
Penetrate whether light can all be received by photodiode；Execution step S401 afterwards；
S203, when detection transmitting the light rightmost side light fall in the rightmost side of photodiode range of receiving when, judge
Can all be received by photodiode, afterwards execution step S300.
In the present embodiment, when angle a1 is less than its maximum emission angle a, and when photodiode can not receive all
Reflection light when, by angle arranging unit to infrarede emitting diode launch Infrared launch angle a1 be configured,
By scanning, the angle of setting is corrected again, finally enables photodiode receive whole reflection lights, make close
Sensor energy normal work.
In the detection control method of the present invention, need to infrared when photodiode does not receive any reflection light
The light of light-emitting diodes chief of breech is corrected, as shown in fig. 6, described step S400 specifically includes：
S411, when ambient light detection ADC sense photodiode do not receive reflection light when, distance detection ADC
The distance between module detection shelter and proximity transducer, and feed back to angle arranging unit；
S412, by angle arranging unit according to described distance, carry out reflection light to sending out that photodiode direction rotates
The setting of firing angle degree；
S413, the angle of the rotation being arranged by angle scanning unit scan angle arranging unit, and the result that will scan
Feed back to described angle correcting unit；
When S414, the reflection light after the setting of angle arranging unit deviate the receiving angle scope of photodiode, school
The rotational angle of positive-angle arranging unit, makes reflection light fall in the range of the receiving angle of photodiode.
Launch angle due to infrarede emitting diode can be arranged by angle arranging unit, when infrarede emitting diode is sent out
When the launch angle penetrating Infrared is equal to its maximum emission angle, refer to Fig. 7, described step S200 specifically includes：
S211, when detection transmitting the light rightmost side light fall in photodiode range of receiving when it is impossible to judge send out
Penetrate whether light can all be received by photodiode；Execution step S401 afterwards；
S212, when detection transmitting the light rightmost side light fall the leftmost side in photodiode range of receiving when, or
Person when the light of the detection transmitting light leftmost side falls the rightmost side in photodiode range of receiving, then judges transmitting light
Can not be received by photodiode；Execution step S411 afterwards；
S213, when detection transmitting the light rightmost side light fall in the rightmost side of photodiode range of receiving when, judge
Can all be received by photodiode, afterwards execution step S300.
In the present embodiment, when angle a1 is arranged equal to maximum emission angle a, if photodiode do not receive any
During reflection light, rotated the angle of departure of infrarede emitting diode by angle arranging unit, so that leftmost transmitting light L1a is fallen
Photodiode accepts on the leftmost side L1b of scope, or makes rightmost transmitting light L2a fall to accept model in photodiode
On the rightmost side L2b enclosing, finally make photodiode and whole reflection lights can be received, enable the normal work of proximity transducer
Make.
In sum, the present invention adjusts the launch angle of infrarede emitting diode by calibration module, makes photodiode
Whole reflection lights can be received such that it is able to correctly detect the distance between shelter and proximity transducer, correct control
The light on and off state of LCD screen, makes when not needing the bright LCD screen of main points LCD screen extinguish, so as to reduce the power consumption of mobile terminal, subtracts
Little LCD screen heating, extends the service life of mobile terminal.
It is understood that for those of ordinary skills, with technology according to the present invention scheme and its can send out
Bright design in addition equivalent or change, and all these change or replace the guarantor that all should belong to appended claims of the invention
Shield scope.
Claims (9)
1. a kind of detecting and controlling system of LCD screen light on and off state is it is characterised in that include：Proximity transducer, calibration module and in
Central processor；
Described proximity transducer includes：
Infrarede emitting diode, for launching Infrared；
Photodiode, for receiving the light of shelter reflection；
Ambient light detects ADC, whether can receive whole reflection lights for sense photodiode, and will receive
Reflection light be converted into digital signal and be stored in data register；
Distance detection ADC, for detecting the distance of shelter and proximity transducer, and is converted into digital signal and is stored in number
According in depositor；
Described data register, detects ADC and the testing result of distance detection ADC for storage environment light；
Command register, for interrupting central processing unit when data register has deposited data so as to respond proximity transducer
Testing result, and according to testing result control LCD screen light on and off state；
Described calibration module, for when photodiode does not receive or can only receive part reflection light, adjustment is red
The launch angle of UV light-emitting diode, enables photodiode to receive the light of shelter reflection；
Described calibration module includes：
Angle arranging unit, for when photodiode can not receive whole reflection lights, setting Infrared is hidden
After block material reflection, the launch angle that can fall all the time in the range of the receiving angle of photodiode；
Angle scanning unit, the transmitting light quilt of the infrarede emitting diode for being arranged by pulse scanning angle arranging unit
It is reflected in the state in the range of photodiode receiving angle, and scanning result is fed back to angle correcting unit；
Angle correcting unit, for when reflection light deviates receiving angle scope, by correcting angle arranging unit to transmitting
The setting of angle, make transmitting light be blocked thing reflection after fall in the range of the receiving angle of photodiode.
2. LCD screen light on and off state according to claim 1 detecting and controlling system it is characterised in that
Described distance detection ADC, is additionally operable to when photodiode does not receive reflection light, detection shelter with close
The distance between sensor, and feed back to angle arranging unit；
Described angle arranging unit, is additionally operable to according to described distance, carries out reflection light to sending out that photodiode direction rotates
The setting of firing angle degree；
Described angle scanning unit, is additionally operable to the rotational angle of scanning angle arranging unit setting, and the result feedback by scanning
To described angle correcting unit；
Described angle correcting unit, is additionally operable to the reception that the reflection light after angle arranging unit is arranged deviates photodiode
During angular range, the rotational angle of correction angle arranging unit, so that reflection light is fallen in the receiving angle scope of photodiode
Interior.
3. the detecting and controlling system of the LCD screen light on and off state according to claim 1-2 any one is it is characterised in that institute
State the acceptance angle less than photodiode reception reflection light for the angle of departure that infrarede emitting diode launches Infrared.
4. the detecting and controlling system of LCD screen light on and off state according to claim 1 is it is characterised in that described shelter is
Black shelter.
5. a kind of detection control method of the detecting and controlling system of LCD screen light on and off state as claimed in claim 1, its feature exists
In, including：
A, launched Infrared by infrarede emitting diode, and receive the light of shelter reflection by photodiode；
B, by ambient light detection ADC sense photodiode whether can receive whole reflection lights；If it is, holding
Row step C；Otherwise, execution step D；
C, the reflection light receiving is converted into digital signal it is stored in data register；Meanwhile, by distance detection ADC mould
Block detects the distance of shelter and proximity transducer, and is converted into digital signal and is stored in data register, executes afterwards again
Step E；
D, when photodiode do not receive or can only receive partial occlusion thing reflection light when, adjusted by calibration module
The launch angle of infrarede emitting diode, enables photodiode to receive whole reflection lights, afterwards execution step E again；
E, when depositing, in data register, the data that ambient light detects ADC and distance detection ADC detection, by referring to
Make register interrupts central processing unit respond the testing result of proximity transducer, and control the light on and off of LCD screen according to testing result
State.
6. detection control method according to claim 5 is it is characterised in that described step D specifically includes：
D1, when photodiode can not receive whole reflection lights, by angle arranging unit setting Infrared hidden
After block material reflection, the launch angle that can fall all the time in the range of the receiving angle of photodiode；
The transmitting light that D2, angle scanning unit pass through the infrarede emitting diode of pulse scanning angle setup module setting is anti-
Penetrate the state in the range of photodiode receiving angle, and scanning result is fed back to angle correcting unit；
D3, angle correcting unit when reflection light deviates receiving angle scope, by the setting of reflection angle to transmitting light
Put, make transmitting light be blocked thing reflection after fall in the range of the receiving angle of photodiode.
7. detection control method according to claim 5 launches Infrared it is characterised in that working as infrarede emitting diode
Launch angle be less than its maximum emission angle when, described step B specifically includes：
B1, when detection transmitting the light leftmost side light fall in the leftmost side of photodiode range of receiving when, judge launching light
Line deducts the light of transmitting in the range of launch angle in described launch angle to maximum emission angle, can be all by photodiode
Receive, execution step C afterwards；
B2, when detection transmitting the light leftmost side light fall in photodiode range of receiving when it is impossible to judge transmitting light
Whether can all be received by photodiode；Execution step D1 afterwards；
B3, when the light of the detection transmitting light rightmost side falls in the rightmost side of photodiode range of receiving, judging can all
Received by photodiode, afterwards execution step C.
8. detection control method according to claim 5 is it is characterised in that described step D specifically includes：
D1 ', when ambient light detection ADC sense photodiode do not receive reflection light when, distance detection ADC inspection
Survey the distance between shelter and proximity transducer, and feed back to angle arranging unit；
D2 ', by angle arranging unit according to described distance, carry out the launch angle that reflection light rotates to photodiode direction
Setting；
D3 ', the angle of the rotation being arranged by angle scanning unit scan angle arranging unit, and the result of scanning is fed back to
Described angle correcting unit；
When D4 ', the reflection light after the setting of angle arranging unit deviate the receiving angle scope of photodiode, correct angle
The rotational angle of arranging unit, makes reflection light fall in the range of the receiving angle of photodiode.
9. detection control method according to claim 8 launches Infrared it is characterised in that working as infrarede emitting diode
Launch angle be equal to its maximum emission angle when, described step B specifically includes：
B1 ', when detection transmitting the light rightmost side light fall in photodiode range of receiving when it is impossible to judge transmitting light
Whether can all be received by photodiode；Execution step D1 afterwards；
B2 ', when detection transmitting the light rightmost side light fall the leftmost side in photodiode range of receiving when, or when inspection
Survey the transmitting light leftmost side light fall the rightmost side in photodiode range of receiving when, then judge that transmitting light can not be by
Photodiode receives；Execution step D1 ' afterwards；
B3 ', when the light of the detection transmitting light rightmost side falls in the rightmost side of photodiode range of receiving, judging can all
Received by photodiode, afterwards execution step C.
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| CN105224147A (en) * | 2015-10-13 | 2016-01-06 | Tcl移动通信科技（宁波）有限公司 | A kind of mobile terminal proximity transducer that prevents is by the method and system of ambient light interference |
| CN106686215B (en) * | 2016-12-06 | 2022-03-25 | Oppo广东移动通信有限公司 | Sensor assembly and mobile terminal |
| CN107483740B (en) * | 2017-08-25 | 2020-08-07 | 北京小米移动软件有限公司 | Calibration method and device for distance sensor and storage medium |
| CN108962190B (en) * | 2018-07-11 | 2020-10-02 | 广州视源电子科技股份有限公司 | Bright screen control method and device, storage medium and intelligent mirror |
| CN111596300B (en) * | 2019-02-20 | 2023-03-14 | 北京小米移动软件有限公司 | Distance sensor module, mobile terminal, distance detection method and device |
| CN114061750A (en) * | 2021-11-09 | 2022-02-18 | 珠海格力智能装备有限公司 | Infrared light intensity detection device and method |
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| CN101800790B (en) * | 2009-12-28 | 2017-04-12 | 华为终端有限公司 | Method and mobile phone for solving misoperation during conversation of touch-screen mobile phone |
| TW201305998A (en) * | 2011-07-20 | 2013-02-01 | Hon Hai Prec Ind Co Ltd | Electronic device with function of adjusting backlight and method thereof |
| CN102520852A (en) * | 2011-11-29 | 2012-06-27 | 华为终端有限公司 | Control method of mobile equipment screen status and associated mobile equipment |
| CN103179260A (en) * | 2011-12-26 | 2013-06-26 | 闻泰通讯股份有限公司 | Method of utilizing range sensor to wake up mobile phone screen |
| CN102665008B (en) * | 2012-05-08 | 2013-11-13 | 广东欧珀移动通信有限公司 | Detecting algorithm for infrared proximity sensor of touch screen mobile phone |
| CN103581394B (en) * | 2012-08-02 | 2017-08-04 | 希姆通信息技术（上海）有限公司 | The test device and method of testing of the proximity transducer of mobile terminal |
| CN102984372A (en) * | 2012-11-21 | 2013-03-20 | 广东欧珀移动通信有限公司 | Method and device for extinguishing and lighting screen and mobile terminal |
| CN203054794U (en) * | 2012-12-13 | 2013-07-10 | 中航华东光电有限公司 | Touch screen reducing light leakage and display |
| CN103024197B (en) * | 2012-12-28 | 2014-07-16 | 广东欧珀移动通信有限公司 | Touch screen cellphone capable of preventing misoperations during calls and using method for touch screen cellphone |
| CN103916935A (en) * | 2012-12-31 | 2014-07-09 | 赛龙通信技术（深圳）有限公司 | Backlight control system and control method of mobile terminal |
| CN103179271B (en) * | 2013-02-28 | 2018-02-23 | 努比亚技术有限公司 | The fool proof method and apparatus of mobile terminal screen brightness regulation |
| CN103369142B (en) * | 2013-07-09 | 2015-02-04 | 广东欧珀移动通信有限公司 | Method and system for avoiding call-up malfunction |
| CN103442136B (en) * | 2013-08-19 | 2015-07-15 | 惠州Tcl移动通信有限公司 | Method and system for dual calibration of proximity sensor |
| CN103561158B (en) * | 2013-10-09 | 2015-10-07 | 广东明创软件科技有限公司 | Prevent method and the mobile terminal thereof of misoperation in communication process |
| CN103561165B (en) * | 2013-10-18 | 2015-06-17 | 广东欧珀移动通信有限公司 | Method and device for preventing sticking film from affecting normal working of proximity transducer |
| CN203537441U (en) * | 2013-10-23 | 2014-04-09 | 惠州市桑莱士光电有限公司 | A handset camera head which can control the light switch-on and light switch-off of a handset screen |
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