CN109830179A - Terminal device and photosensitive detection method for terminal device - Google Patents
Terminal device and photosensitive detection method for terminal device Download PDFInfo
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- CN109830179A CN109830179A CN201910249816.0A CN201910249816A CN109830179A CN 109830179 A CN109830179 A CN 109830179A CN 201910249816 A CN201910249816 A CN 201910249816A CN 109830179 A CN109830179 A CN 109830179A
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Abstract
The present invention provides a kind of terminal device and the photosensitive detection method for terminal device, the terminal device includes display screen and the infrared sensor set on the display screen, the infrared sensor includes infrared transmitting tube and infrared receiving tube, the infrared sensor is located at below the display screen and towards the display screen, the display screen has scanning circuit, and the scanning circuit is for detecting the position of the infrared sensor on the display screen.In this way, determining the position of infrared sensor on a display screen, the accurate location of available infrared sensor on a display screen, so as to improve infrared sensor to the detection accuracy close to object by scanning circuit.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of terminal device and for the photosensitive detection side of terminal device
Method.
Background technique
With the rapid development of terminal technology, terminal device has become essential a kind of tool in people's life,
And the various aspects for user's life are brought great convenience.Infrared sensor can be set under screen, close to detect
Object.But since the infrared light that display screen issues may influence whether the detection of infrared sensor, so needing some benefits
Algorithm is repaid to eliminate the interference of the infrared light of display screen sending.But since infrared sensor is always deposited during assembly
In inevitable error, cause infrared sensor poor to the detection accuracy close to object.
Summary of the invention
The embodiment of the present invention provides a kind of terminal device and photosensitive detection method, to solve the infrared sensor of terminal device
The problem poor to the detection accuracy close to object.
In order to solve the above-mentioned technical problem, the present invention is implemented as follows:
In a first aspect, the embodiment of the invention provides a kind of terminal device, including display screen and set on the display screen
Infrared sensor, the infrared sensor include infrared transmitting tube and infrared receiving tube, and the infrared sensor is located at described aobvious
Below display screen and towards the display screen, the display screen has scanning circuit, and the scanning circuit is described infrared for detecting
The position of sensor on the display screen.
Second aspect, the embodiment of the present invention also provide a kind of photosensitive detection method, are applied to above-mentioned terminal device, comprising:
In stage position detection, controls the ambient light signal that the infrared sensor senses and be in predetermined optical signal range
It is interior, so that the value of electrical signals for the environment photosignal that the ambient light signal is converted to is located at by the infrared sensor
Within the scope of predetermined electrical signals value；
The multirow grid line that the terminal includes successively is scanned, detects whether the infrared sensor output exports electric signal,
When detecting the infrared sensor output electric signal, determine that the infrared sensor corresponds to current scanned Nth row
Grid line setting；
The Nth row grid line output significant level is controlled, control multiple columns of data lines are sequentially output data voltage, and detect institute
State infrared sensor output electric signal, judge the value of electrical signals of the electric signal whether within the scope of the predetermined electrical signals value,
When the value of electrical signals is not within the scope of the predetermined electrical signals value, determine that the infrared sensor corresponds to current output institute
The data line setting for stating data voltage obtains the infrared sensor and corresponds to the Nth row m column pixel that the display screen includes
The position detection result of unit setting；N and M is positive integer.
A kind of terminal device of the embodiment of the present invention, including display screen and set on the infrared sensor of the display screen, institute
Stating infrared sensor includes infrared transmitting tube and infrared receiving tube, and the infrared sensor is located at below the display screen and direction
The display screen, the display screen have scanning circuit, and the scanning circuit is for detecting the infrared sensor described aobvious
Position in display screen.In this way, determining the position of infrared sensor on a display screen, available infrared sensing by scanning circuit
The accurate location of device on a display screen, so as to improve infrared sensor to the detection accuracy close to object.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, needed in being described below to the embodiment of the present invention
Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention,
For those of ordinary skill in the art, without any creative labor, it can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is one of the circuit diagram of terminal provided in an embodiment of the present invention；
Fig. 2 is the two of the circuit diagram of terminal provided in an embodiment of the present invention；
Fig. 3 is the three of the circuit diagram of terminal provided in an embodiment of the present invention；
Fig. 4 is the four of the circuit diagram of terminal provided in an embodiment of the present invention；
Fig. 5 is the five of the circuit diagram of terminal provided in an embodiment of the present invention；
Fig. 6 is the six of the circuit diagram of terminal provided in an embodiment of the present invention；
Fig. 7 is the flow chart of photosensitive detection method provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
The transistor used in all embodiments of the invention all can be triode, thin film transistor (TFT), field-effect tube or its
The identical device of his characteristic.In embodiments of the present invention, to distinguish the two poles of the earth of transistor in addition to control electrode, will wherein claim a pole
For the first pole, another pole is known as the second pole.
In practical operation, when the transistor is triode, the control electrode can be base stage, and first pole can
Think collector, second pole can be with emitter；Alternatively, the control electrode can be base stage, described first can be extremely hair
Emitter-base bandgap grading, second pole can be with collector.
In practical operation, when the transistor is thin film transistor (TFT) or field-effect tube, the control electrode can be grid
Pole, described first can be extremely drain electrode, and described second extremely can be source electrode；Alternatively, the control electrode can be grid, described the
One extremely can be source electrode, and described second can be extremely drain electrode.
It is the circuit diagram of terminal device provided in an embodiment of the present invention referring to Fig. 1, Fig. 1.The terminal device includes aobvious
Display screen and infrared sensor 101 set on the display screen, the infrared sensor 101 include infrared transmitting tube and infrared receiver
Pipe, the infrared sensor 101 is located at below the display screen and towards the display screen, as shown in Figure 1, the display screen has
There is scanning circuit 102, the scanning circuit 102 is for detecting the position of the infrared sensor 101 on the display screen.
In the present embodiment, above-mentioned infrared sensor 101 includes infrared transmitting tube and infrared receiving tube, thus infrared sensor
101 can both emit infrared signal, also can receive infrared signal.Above-mentioned infrared sensor 101 is located at the display screen
Lower section refers to that infrared sensor 101 is set to the lower section that the display screen is not used in the one side of display.Detect the infrared sensing
The position of device 101 on the display screen refers to the position of the orthographic projection of the infrared sensor 101 on the display screen.
The terminal device of the present embodiment is examined by the way that infrared sensor 101 to be set to the lower section of display screen using scanning circuit
Survey the position of infrared sensor 101 on a display screen, the accurate location of available infrared sensor 101 on a display screen.From
And the influential infrared light in the position may further will be removed in the infrared light of display screen generation, make infrared sensing
The received infrared light of device 101 is only the infrared light reflected after emitting by barrier, to improve infrared sensor 101 to close
The detection accuracy of object.
In the present embodiment, scanning circuit 102 respectively with a grid line Scan, first voltage end VDD1 and infrared sensor 101
Connection.In the specific implementation, the infrared sensor 101 is used for the light that inducing pixel circuit issues, and the pixel circuit includes
One data line Data, first switch tube T1, second switch T2, light emitting diode D1 and capacitor C1.And the tool of these components
Body connection type is as shown in Figure 1, details are not described herein.When grid line Scan export high level when, first voltage end VDD1 with it is infrared
It is connected between sensor 101.First switch tube T1 and second switch T2 can also be opened, the data voltage of data line Data output
Light emitting diode D1 can be made to shine, so that infrared sensor 101 can sense optical signal to be converted to corresponding telecommunications
Number.Above electrical signal can be voltage, or be also possible to electric current, be not construed as limiting to this embodiment of the present invention.
In the present embodiment, may exist a plurality of grid line and multiple data lines in the display screen of terminal device, and can be with
Assuming that a plurality of grid line is laterally arranged, multiple data lines are longitudinally disposed.It, can be with when needing to detect the position of infrared sensor 101
Successively scan multirow grid line (i.e. so that each row grid line is sequentially output high level) first.When Nth row grid line is arrived in scanning, such as scan
When to grid line Scan, if detecting that infrared sensor 101 senses optical signal, it is assured that infrared sensor 101
Correspond to the pixel unit setting of Nth row.
Then it can control Nth row grid line output high level, i.e. grid line Scan exports high level, other row grid lines all export
Low level makes multiple columns of data lines be sequentially output data voltage.When m column data line output data voltage, if detected red
Outer sensor 101 senses optical signal, then being assured that infrared sensor 101 corresponds to Nth row m column pixel unit and sets
It sets.It should be noted that when multiple data lines are laterally arranged, similarly can detecte infrared sensing when a plurality of grid line is longitudinally disposed
The specific location of device 101 repeats no more this embodiment of the present invention.
In the present embodiment, infrared sensor 101 can be directly driven using the first voltage end VDD1 of display screen, and
The enable signal that the voltage for using grid line Scan to export works as infrared sensor 101, without being individually for infrared sensing
Device 101 is arranged voltage end and enable end and also reduces power consumption to save cost.At this time can with referring to Fig.2, Fig. 2 be this hair
The circuit diagram for the terminal device that bright embodiment provides.
In Fig. 2, scanning circuit 102 is switching transistor T3, and the grid of switching transistor T3 is connect with grid line Scan, is switched
The first pole of transistor T3 is connect with first voltage end VDD1, and the second pole of switching transistor T3 is connect with infrared sensor 101.
The grid of switching transistor T3 is connect with grid line Scan, and grid line can control being switched on or off for the first pole and the second pole, from
And it is switched on or off first voltage end VDD1 with infrared sensor 101.Above-mentioned switching transistor T3 can be first extremely
Source electrode, second extremely drains；Or be also possible to first and extremely drain, the second extremely source electrode.
In the present embodiment, above-mentioned terminal device can be mobile phone, tablet computer (Tablet Personal Computer),
Laptop computer (Laptop Computer), personal digital assistant (personal digital assistant, abbreviation PDA),
Mobile Internet access device (Mobile Internet Device, MID) or wearable device (Wearable Device) etc..
Optionally, as shown in figure 3, the scanning circuit 102 includes: switch module 1021 and control module 1022；
The switch module 1021 is connect with a grid line Scan, first voltage end VDD1 and photosensitive node PD respectively, is used for
Under the control of the grid line Scan, controls and whether be connected between the first voltage end VDD1 and the photosensitive node PD；
The control module 1022 respectively with the photosensitive node PD, enable end EN, second voltage end VDD2 and described red
Outer sensor 101 connects, for controlling the infrared sensor under the control of the enable end EN in stage position detection
It is connected between 101 and the photosensitive node PD, controls and do not led between the second voltage end VDD2 and the infrared sensor 101
It is logical；
When being connected between the infrared sensor 101 and the first voltage end VDD1, the infrared sensor 101 is used
In the optical signal that induction receives, and the optical signal is converted into corresponding electric signal.
In present embodiment, the infrared sensor is controlled under the control of the enable end EN in stage position detection
It is connected between 101 and the photosensitive node PD, controls and do not led between the second voltage end VDD2 and the infrared sensor 101
It is logical, so as to determine the position of infrared sensor 101 by row scanning and column scan.Above electrical signal can be electric current letter
Number, it is also possible to voltage signal, this present embodiment is not construed as limiting.
Optionally, the control module 1022 was also used in the ranging stage, under the control of the enable end EN, controlled institute
It states and is connected between infrared sensor 101 and the photosensitive node PD, control the second voltage end VDD2 and the infrared sensing
It is not turned between device 101；
When being connected between the infrared sensor 101 and the first voltage end VDD1, the infrared sensor 101 is used
Ranging is carried out in infrared signal based on the received and backoff algorithm.
In present embodiment, since the position of infrared sensor 101 on a display screen is it was determined that so pass through above-mentioned benefit
The influential infrared light in the position can will be removed in the infrared light of display screen generation by repaying algorithm, make infrared sensor
101 received infrared lights are only the infrared light reflected after emitting by barrier, to improve infrared sensor 101 to close to object
The detection accuracy of body.
In present embodiment, under the control of the enable end EN, the infrared sensor 101 and the photoreceptor section are controlled
It is connected between point PD, controls and be not turned between the second voltage end VDD2 and the infrared sensor 101；When the infrared biography
When being connected between sensor 101 and the first voltage end VDD1, the infrared sensor 101 is believed for infrared light based on the received
Number and backoff algorithm carry out ranging.In this way, it is only necessary to which a power supply (i.e. first voltage end VDD1) is powered, infrared biography
Sensor 101 can be carried out distance detection, save the cost of terminal device.
Optionally, the control module 1022 was also used in the ranging stage, under the control of the enable end EN, controlled institute
It states and is connected between second voltage end VDD2 and the infrared sensor 101, control the infrared sensor 101 and the photoreceptor section
It is not turned between point PD；
When being connected between the infrared sensor 101 and the second voltage end VDD2, the infrared sensor 101 is used
Ranging is carried out in infrared signal based on the received and backoff algorithm.
In present embodiment, since the position of infrared sensor 101 on a display screen is it was determined that so pass through above-mentioned benefit
The influential infrared light in the position can will be removed in the infrared light of display screen generation by repaying algorithm, make infrared sensor
101 received infrared lights are only the infrared light reflected after emitting by barrier, to improve infrared sensor 101 to close to object
The detection accuracy of body.
In present embodiment, under the control of the enable end EN, control the second voltage end VDD2 with it is described infrared
It is connected between sensor 101, controls and be not turned between the infrared sensor 101 and the photosensitive node PD；When described infrared
When being connected between sensor 101 and the second voltage end VDD2, the infrared sensor 101 is for infrared light based on the received
Signal and backoff algorithm carry out ranging.In this way, infrared sensor 101 being capable of independent work after complete row scan or column scan
Make, not will cause the additional power consumption of display screen.
Optionally, as shown in figure 4, the control module 1022 includes the first control transistor T4 and the second control transistor
T5；
Wherein, the control electrode of the first control transistor T4 is connect with the enable end EN, the first control crystal
The first pole of pipe T4 is connect with the photosensitive node PD, the second pole of the first control transistor T4 and the infrared sensor
101 connections；
The control electrode of the second control transistor T5 is connect with the enable end EN, the second control transistor T5's
First pole is connect with the second voltage end VDD2, the second pole of the second control transistor T5 and the infrared sensor
101 connections；
The first control transistor T4 is p-type transistor, and the second control transistor T5 is n-type transistor；Alternatively,
The first control transistor T4 is n-type transistor, and the second control transistor T5 is p-type transistor.
In present embodiment, above-mentioned first control transistor T4 can be the first extremely source electrode, and second extremely drains；Or
It is also possible to first extremely to drain, the second extremely source electrode.Above-mentioned second control transistor T5 can be the first extremely source electrode, and second
Extremely drain；Or be also possible to first and extremely drain, the second extremely source electrode.
In present embodiment, the grid and second of the control of above-mentioned enable end EN and first transistor T4 controls transistor T5's
Grid connection, to can control two transistors using an enable end EN.Also, due to the first control transistor T4
For p-type transistor, the second control transistor T5 is n-type transistor；Alternatively, the first control transistor T4 is that N-shaped is brilliant
Body pipe, the second control transistor T5 is p-type transistor.When so providing suitable voltage by enable end EN, it can make
First control transistor T4 and the second control transistor T5 is in different states (i.e. one of conducting, another disconnection).
And when EN provides another suitable voltage when enable end, the first control transistor T4 and second can be made to control transistor T5
Respective switching state (i.e. conducting switches to disconnection, or disconnects switching-on).
For example, the first control transistor T4 can be p-type transistor, the second control transistor T5 can be n-type transistor.
When enable end, EN provides a lower voltage, the first control transistor T4 conducting, the second control transistor T5 is disconnected, thus
The specific location of row scanning and column scan infrared sensor 101 can be passed through.When enable end, EN provides a higher voltage,
First control transistor T4 is disconnected, the second control transistor T5 conducting, so that infrared sensor 101 can be independently of display screen
Real-time working.When carrying out content augmentation using backoff algorithm, can there will be shadow to the position in the infrared light of display screen generation
Loud infrared light is removed, and making the received infrared light of infrared sensor 101 is only after emitting by the infrared of barrier reflection
Light, to improve infrared sensor 101 to the detection accuracy close to object.
Similarly, it when the first control transistor T4 is n-type transistor, and the second control transistor T5 is p-type transistor, only needs
Different voltage is provided in enable end EN, the first control transistor T4 and the second control transistor T5 can also be controlled
System, repeats no more this present embodiment.
Optionally, the infrared sensor 101 is integrated in the lower surface of the display screen.
In present embodiment, infrared sensor 101 is integrated under the screen of the display screen, can reduce infrared sensor
101 error.
Optionally, as shown in figure 5, the scanning circuit 102 further includes sampling module 1023；The sampling module 1023 is used
In the electric signal for sampling the output of infrared sensor 101.
In present embodiment, the electric signal that above-mentioned sampling module 1023 can export infrared sensor 101 is sampled,
And the variation of electric signal can also be detected.After can also carrying out some simple processing, processor is sent result to.This
Sample, processor can determine infrared sensor according to the size of the electric signal detected or the size of change in electric
101 position.Certainly, above-mentioned sampling module 1023 preferably can be an analog-digital converter.It should be noted that sampling mould
Block 1023 can also be applied to Fig. 1 into Fig. 3, and the electric signal for sampling the output of infrared sensor 101.
Also, when switch module 1021 includes switching transistor T3, and sampling module is analog-digital converter ADC, at this time may be used
Refering to circuit diagram shown in fig. 6.It should be noted that when infrared sensor 101 includes infrared receiving diode D2,
It can also be applied in Fig. 1 to Fig. 4.
In order to better understand whole process, can also be understood referring to the following course of work.Illustrate work with row scanning
Make principle.Illustrate working principle with row scanning.Assuming that the scanning signal of the i-th row of grid line Scan output display screen, light-emitting diodes
Pipe D1 is the corresponding one of light emitting diode of some pixel, and infrared receiving diode D2 is the following table for being integrated in display screen
One in the infrared receiving tube in face.Now it needs to be determined that the position of infrared receiving diode D2 on a display screen was (both corresponding
Location of pixels provides higher precision for backoff algorithm).
Terminal device is placed under dark situation (prevent external ambient light from being received through screen by infrared receiving diode D2,
Influence the positioning of position), processor controls enable end EN and exports high level, and the second control transistor T5 is closed at this time, disconnects
External independent current source (second voltage end VDD2) is to the supply access of infrared receiving diode D2；First control transistor T4 is beaten
It opens.
The frame image display scanning of display screen is to the i-th row, and grid line Scan is selected, and first switch tube T1 is opened, data
The data voltage of line Data output controls the drain current (power supply first of second switch T2 by first switch tube T1
Voltage end VDD1), driving light emitting diode D1 starts to shine.
Grid line Scan is selected, and switching transistor T3 pipe is opened, since the first control transistor T4 has already turned on, first
Voltage end VDD1 to infrared receiving diode D2 power (at this point, grid line Scan export line scan signals be can uniquely allow it is luminous
The control signal that diode D1 and infrared receiving diode D2 are worked at the same time), infrared receiving diode D2 starts to work, and passes through inspection
The light that light emitting diode D1 is issued is surveyed, the carrier in infrared receiving diode D2 increases, and electric current becomes larger, analog-digital converter ADC
It detects this curent change, after signal processing, is sent to processor, and recording time at this time in the processor
For t.At the same time, display screen is that the i-th row in the information of scanning is sent in processor t moment by line synchronising signal TE.
To sum up, in t moment, in addition to the i-th row grid line Scan has content, remaining row does not shine to be black all, grid line Scan
Control infrared receiving diode D2 receives this unique light source.In this way in synchronization t, processor has received infrared simultaneously
The information of reception diode D2 and the scanning of the i-th row have also been known that the position letter of i-th row of the infrared receiving diode D2 on screen
Breath.Column scan process is also as above similar.In this way it is known that accurate location information of the infrared receiving diode D2 on screen.
Behind the position for navigating to infrared receiving diode D2, in normal work, it can accurately know that each frame exists
The pixel of the position of infrared receiving diode D2 shows content.When carrying out content augmentation, it can accurately be directed to infrared receiver two
The content that pole pipe D2 is received is calculated, and keeps 101 detection accuracy of infrared sensor higher.
A kind of terminal device of the embodiment of the present invention, including display screen and set on the infrared sensor 101 of the display screen,
The infrared sensor 101 includes infrared transmitting tube and infrared receiving tube, and the infrared sensor 101 is located under the display screen
Just and towards the display screen, the display screen has scanning circuit 102, and the scanning circuit 102 is described infrared for detecting
The position of sensor 101 on the display screen.In this way, determining infrared sensor 101 on a display screen by scanning circuit 102
Position, the accurate location of available infrared sensor 101 on a display screen is right so as to improve infrared sensor 101
Close to the detection accuracy of object.
It is the flow chart of photosensitive detection method provided in an embodiment of the present invention referring to Fig. 7, Fig. 7, is applied to above-mentioned terminal, such as
Shown in Fig. 7, comprising the following steps:
Step 701, in stage position detection, control the ambient light signal that the infrared sensor senses and be in predetermined light
In range of signal, so that the telecommunications for the environment photosignal that the ambient light signal is converted to by the infrared sensor
Number value be located at predetermined electrical signals value within the scope of.
Step 702 successively scans the multirow grid line that the terminal includes, and detects whether the infrared sensor output exports
It is current scanned to determine that the infrared sensor corresponds to when detecting the infrared sensor output electric signal for electric signal
Nth row grid line setting.
Step 703, the control Nth row grid line export significant level, and control multiple columns of data lines are sequentially output data voltage,
And the electric signal of the infrared sensor output is detected, judge the value of electrical signals of the electric signal whether in the predetermined electrical signals value
In range, when the value of electrical signals is not within the scope of the predetermined electrical signals value, determines that the infrared sensor corresponds to and work as
The data line setting of the preceding output data voltage obtains the infrared sensor and corresponds to the Nth row that the display screen includes
The position detection result of m column pixel unit setting；N and M is positive integer.
In the present embodiment, since Nth row grid line exports significant level, then infrared sensor can detecte optical signal.?
When m column data line output data voltage, since infrared sensor is other than detecting ambient light signal, it can also detect
The optical signal that Nth row m column pixel unit is issued.In this way, the value of electrical signals of infrared sensor output electric signal, just not in institute
It states within the scope of predetermined electrical signals value.It may thereby determine that infrared sensor corresponds to the Nth row m column picture that the display screen includes
The position detection result of plain unit setting.
It optionally, further include the ranging stage after the stage position detection；The photosensitive detection method further include:
In the ranging stage, when scanning the Nth row grid line, m column data line exports M data voltage, switch
Module is controlled and is connected between first voltage end and photosensitive node under the control of the Nth row grid line, the infrared sensor sense
Received REAL TIME INFRARED THERMAL IMAGE optical signal is answered, obtains reflecting by barrier according to the REAL TIME INFRARED THERMAL IMAGE optical signal and backoff algorithm
Infrared signal；
Ranging is carried out according to the infrared signal by barrier reflection.
In present embodiment, since the position of infrared sensor and the corresponding pixel unit of infrared sensor can be true
It is fixed, and REAL TIME INFRARED THERMAL IMAGE optical signal includes the infrared signal that the pixel unit issues and the infrared light letter by barrier reflection
Number, then infrared sensor can perform some processing the REAL TIME INFRARED THERMAL IMAGE optical signal received, to obtain by barrier
The infrared signal of reflection.For example, can according to above-mentioned backoff algorithm, remove REAL TIME INFRARED THERMAL IMAGE optical signal in infrared sensor pair
The infrared signal for the pixel unit answered, to improve infrared sensor to the detection accuracy close to object.Alternatively, can also make
With some correction algorithms, the infrared signal of REAL TIME INFRARED THERMAL IMAGE optical signal pixel unit corresponding with infrared sensor is removed, thus
Infrared sensor is improved to the detection accuracy close to object.
Optionally, the photosensitive detection method further include:
In the stage position detection, control module under the control of enable end, control the infrared sensor with it is described
It is connected between photosensitive node, controls and be not turned between second voltage end and the infrared sensor.
Optionally, the photosensitive detection method further include:
In the ranging stage, control module under the control of enable end, control the infrared sensor with it is described photosensitive
It is connected between node, controls and be not turned between second voltage end and the infrared sensor；
Alternatively, the control module controls the second voltage under the control of the enable end in the ranging stage
It is connected between end and the infrared sensor, controls and be not turned between the infrared sensor and the photosensitive node.
In above-mentioned different embodiment, the scanning circuit of terminal device includes control module, and photosensitive node passes through described
Control module is connect with the infrared sensor.And the control process in different embodiments is in the aforementioned embodiment
It is explained in detail, details are not described herein.
A kind of photosensitive detection method of the embodiment of the present invention is applied to above-mentioned terminal, in stage position detection, described in control
The ambient light signal that infrared sensor senses is within the scope of predetermined optical signal, so that the infrared sensor is by the environment
The value of electrical signals for the environment photosignal that optical signal is converted to is located within the scope of predetermined electrical signals value；Successively described in scanning
The multirow grid line that terminal includes, detects whether infrared sensor output exports electric signal, when detecting the infrared sensing
When device exports electric signal, determine that the infrared sensor corresponds to current scanned Nth row grid line setting；Control the N
Row grid line exports significant level, and control multiple columns of data lines are sequentially output data voltage, and detects the infrared sensor output
Electric signal judges the value of electrical signals of the electric signal whether within the scope of the predetermined electrical signals value, when the value of electrical signals does not exist
When within the scope of the predetermined electrical signals value, determine that the infrared sensor corresponds to the data line for currently exporting the data voltage
Setting obtains the position detection for the Nth row m column pixel unit setting that the infrared sensor includes corresponding to the display screen
As a result；N and M is positive integer.The embodiment of the present invention can accurately detect the position of infrared sensor on a display screen, to mention
High IR sensor is to the detection accuracy close to object.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal (can be mobile phone, computer, service
Device, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form belongs within protection of the invention.
Claims (12)
1. a kind of terminal device, which is characterized in that described infrared including display screen and set on the infrared sensor of the display screen
Sensor includes infrared transmitting tube and infrared receiving tube, and the infrared sensor is located at below the display screen and shows towards described
Display screen, the display screen have scanning circuit, and the scanning circuit is for detecting the infrared sensor on the display screen
Position.
2. terminal device according to claim 1, which is characterized in that the scanning circuit includes: switch module and control
Module；
The switch module is connect with a grid line, first voltage end and photosensitive node respectively, under the control of the grid line,
It controls and whether is connected between the first voltage end and the photosensitive node；
The control module is connect with the photosensitive node, enable end, second voltage end and the infrared sensor respectively, is used for
In stage position detection, under the control of the enable end, controls and is connected between the infrared sensor and the photosensitive node,
It controls and is not turned between the second voltage end and the infrared sensor；
When being connected between the infrared sensor and the first voltage end, the infrared sensor is used to incude to receive
Optical signal, and the optical signal is converted into corresponding electric signal.
3. terminal device according to claim 2, which is characterized in that the switch module includes switching transistor；
The control electrode of the switching transistor is connect with the grid line, the first pole of the switching transistor and the first voltage
End connection, the second pole of the switching transistor is connect with the photosensitive node.
4. terminal device according to claim 2, which is characterized in that the control module was also used in the ranging stage,
Under the control of the enable end, controls and be connected between the infrared sensor and the photosensitive node, control the second voltage
It is not turned between end and the infrared sensor；
When being connected between the infrared sensor and the first voltage end, the infrared sensor is for red based on the received
Outer optical signal and backoff algorithm carry out ranging.
5. terminal device according to claim 2, which is characterized in that the control module was also used in the ranging stage,
It under the control of the enable end, controls and is connected between the second voltage end and the infrared sensor, control the infrared biography
It is not turned between sensor and the photosensitive node；
When being connected between the infrared sensor and the second voltage end, the infrared sensor is for red based on the received
Outer optical signal and backoff algorithm carry out ranging.
6. terminal device according to claim 5, which is characterized in that the control module include first control transistor and
Second control transistor；
Wherein, the control electrode of the first control transistor is connect with the enable end, and the first of the first control transistor
Pole is connect with the photosensitive node, and the second pole of the first control transistor is connect with the infrared sensor；
The control electrode of the second control transistor is connect with the enable end, the first pole of the second control transistor and institute
The connection of second voltage end is stated, the second pole of the second control transistor is connect with the infrared sensor；
The first control transistor is p-type transistor, and the second control transistor is n-type transistor；Alternatively, described first
Control transistor is n-type transistor, and the second control transistor is p-type transistor.
7. terminal device according to any one of claim 1 to 6, which is characterized in that the infrared sensor is integrated in
The lower surface of the display screen.
8. terminal device according to any one of claim 1 to 6, which is characterized in that the scanning circuit further includes adopting
Egf block；The sampling module is used to sample the electric signal of the infrared sensor output.
9. a kind of photosensitive detection method is applied to such as terminal device described in any item of the claim 1 to 8, which is characterized in that
Include:
In stage position detection, controls the ambient light signal that the infrared sensor senses and is within the scope of predetermined optical signal,
So that the value of electrical signals for the environment photosignal that the ambient light signal is converted to by the infrared sensor is located in advance
Determine within the scope of value of electrical signals；
The multirow grid line that the terminal includes successively is scanned, detects whether the infrared sensor output exports electric signal, works as inspection
When measuring the infrared sensor output electric signal, determine that the infrared sensor corresponds to current scanned Nth row grid line
Setting；
The Nth row grid line output significant level is controlled, control multiple columns of data lines are sequentially output data voltage, and detect described red
The electric signal of outer sensor output, judges that the value of electrical signals of the electric signal whether within the scope of the predetermined electrical signals value, works as institute
When stating value of electrical signals not within the scope of the predetermined electrical signals value, determines that the infrared sensor corresponds to and currently export the number
It is arranged according to the data line of voltage, obtains the infrared sensor and correspond to the Nth row m column pixel unit that the display screen includes
The position detection result of setting；N and M is positive integer.
10. photosensitive detection method according to claim 9, which is characterized in that also wrapped after the stage position detection
Include the ranging stage；The photosensitive detection method further include:
In the ranging stage, when scanning the Nth row grid line, m column data line exports M data voltage, switch module
Under the control of the Nth row grid line, controls and be connected between first voltage end and photosensitive node, the infrared sensor incudes it
The REAL TIME INFRARED THERMAL IMAGE optical signal received obtains reflecting by barrier red according to the REAL TIME INFRARED THERMAL IMAGE optical signal and backoff algorithm
Outer optical signal；
Ranging is carried out according to the infrared signal by barrier reflection.
11. photosensitive detection method according to claim 10, which is characterized in that the photosensitive detection method further include:
In the stage position detection, control module under the control of enable end, control the infrared sensor with it is described photosensitive
It is connected between node, controls and be not turned between second voltage end and the infrared sensor.
12. photosensitive detection method according to claim 11, which is characterized in that the photosensitive detection method further include:
In the ranging stage, control module controls the infrared sensor and the photosensitive node under the control of enable end
Between be connected, control and be not turned between second voltage end and the infrared sensor；
Alternatively, in the ranging stage, the control module under the control of the enable end, control the second voltage end with
It is connected between the infrared sensor, controls and be not turned between the infrared sensor and the photosensitive node.
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