CN109830179B - Terminal equipment and photosensitive detection method for terminal equipment - Google Patents
Terminal equipment and photosensitive detection method for terminal equipment Download PDFInfo
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- CN109830179B CN109830179B CN201910249816.0A CN201910249816A CN109830179B CN 109830179 B CN109830179 B CN 109830179B CN 201910249816 A CN201910249816 A CN 201910249816A CN 109830179 B CN109830179 B CN 109830179B
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Abstract
The invention provides a terminal device and a photosensitive detection method for the terminal device, wherein the terminal device comprises a display screen and an infrared sensor arranged on the display screen, the infrared sensor comprises an infrared transmitting tube and an infrared receiving tube, the infrared sensor is positioned below the display screen and faces the display screen, the display screen is provided with a scanning circuit, and the scanning circuit is used for detecting the position of the infrared sensor on the display screen. Therefore, the position of the infrared sensor on the display screen is determined through the scanning circuit, and the accurate position of the infrared sensor on the display screen can be acquired, so that the detection precision of the infrared sensor on an object close to the infrared sensor can be improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a terminal device and a light sensing detection method for the terminal device.
Background
With the rapid development of terminal technology, terminal equipment has become an essential tool in people's life, and brings great convenience to various aspects of user's life. An infrared sensor may be placed under the screen to detect approaching objects. However, since the infrared light emitted from the display screen may affect the detection of the infrared sensor, some compensation algorithm is required to eliminate the interference of the infrared light emitted from the display screen. However, the infrared sensor always has inevitable errors in the assembly process, so that the infrared sensor has poor detection accuracy of the close object.
Disclosure of Invention
The embodiment of the invention provides a terminal device and a photosensitive detection method, and aims to solve the problem that an infrared sensor of the terminal device is poor in detection accuracy of an object close to the terminal device.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a terminal device, including a display screen and an infrared sensor disposed on the display screen, where the infrared sensor includes an infrared transmitting tube and an infrared receiving tube, the infrared sensor is located below the display screen and faces the display screen, and the display screen has a scanning circuit, and the scanning circuit is configured to detect a position of the infrared sensor on the display screen.
In a second aspect, an embodiment of the present invention further provides a photosensitive detection method, which is applied to the terminal device, and includes:
in the position detection stage, controlling an ambient light signal sensed by the infrared sensor to be within a preset light signal range, so that an electric signal value of an ambient photoelectric signal obtained by converting the ambient light signal by the infrared sensor is within a preset electric signal value range;
scanning a plurality of rows of grid lines included by the terminal in sequence, detecting whether the infrared sensor outputs an electric signal or not, and determining that the infrared sensor is arranged corresponding to the currently scanned Nth row of grid lines when the infrared sensor outputs the electric signal;
controlling the Nth row of grid lines to output effective levels, controlling a plurality of rows of data lines to sequentially output data voltages, detecting an electric signal output by the infrared sensor, judging whether the electric signal value of the electric signal is within a preset electric signal value range, and when the electric signal value is not within the preset electric signal value range, determining that the infrared sensor is arranged corresponding to the data line currently outputting the data voltages, so as to obtain a position detection result of the infrared sensor corresponding to the Nth row of Mth row of pixel units included in the display screen; n and M are both positive integers.
The terminal device comprises a display screen and an infrared sensor arranged on the display screen, wherein the infrared sensor comprises an infrared transmitting tube and an infrared receiving tube, the infrared sensor is positioned below the display screen and faces the display screen, the display screen is provided with a scanning circuit, and the scanning circuit is used for detecting the position of the infrared sensor on the display screen. Therefore, the position of the infrared sensor on the display screen is determined through the scanning circuit, and the accurate position of the infrared sensor on the display screen can be acquired, so that the detection precision of the infrared sensor on an object close to the infrared sensor can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic circuit diagram of a terminal according to an embodiment of the present invention;
fig. 2 is a second schematic circuit diagram of the terminal according to the embodiment of the present invention;
fig. 3 is a third schematic circuit diagram of a terminal according to an embodiment of the present invention;
FIG. 4 is a fourth schematic circuit diagram of the terminal according to the embodiment of the present invention;
FIG. 5 is a fifth exemplary circuit diagram of the terminal according to the present invention;
FIG. 6 is a sixth schematic circuit diagram of a terminal according to an embodiment of the present invention;
fig. 7 is a flowchart of a photosensitive detection method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The transistors used in all embodiments of the present invention can be triodes, thin film transistors, field effect transistors or other devices with the same characteristics. In the embodiment of the present invention, in order to distinguish two poles of the transistor except the control pole, one pole is called a first pole, and the other pole is called a second pole.
In practical operation, when the transistor is a triode, the control electrode may be a base electrode, the first electrode may be a collector electrode, and the second electrode may be an emitter electrode; alternatively, the control electrode may be a base electrode, the first electrode may be an emitter electrode, and the second electrode may be a collector electrode.
In practical operation, when the transistor is a thin film transistor or a field effect transistor, the control electrode may be a gate electrode, the first electrode may be a drain electrode, and the second electrode may be a source electrode; alternatively, the control electrode may be a gate electrode, the first electrode may be a source electrode, and the second electrode may be a drain electrode.
Referring to fig. 1, fig. 1 is a schematic circuit diagram of a terminal device according to an embodiment of the present invention. This terminal equipment includes the display screen and locates the infrared sensor 101 of display screen, infrared sensor 101 includes infrared transmitting tube and infrared receiving tube, infrared sensor 101 is located the display screen below and orientation the display screen, as shown in fig. 1, the display screen has scanning circuit 102, scanning circuit 102 is used for detecting infrared sensor 101 is in position on the display screen.
In this embodiment, the infrared sensor 101 includes an infrared transmitting tube and an infrared receiving tube, so that the infrared sensor 101 can transmit an infrared light signal and can also receive an infrared light signal. The fact that the infrared sensor 101 is located below the display screen means that the infrared sensor 101 is located below a surface of the display screen which is not used for displaying. The detection of the position of the infrared sensor 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 this embodiment can acquire the accurate position of the infrared sensor 101 on the display screen by locating the infrared sensor 101 below the display screen and detecting the position of the infrared sensor 101 on the display screen by using the scanning circuit. Therefore, infrared light which influences the position in the infrared light generated by the display screen can be further removed, so that the infrared light received by the infrared sensor 101 is only the infrared light reflected by the obstacle after being emitted, and the detection accuracy of the infrared sensor 101 on the approaching object is improved.
In this embodiment, the Scan circuit 102 is respectively connected to a gate line Scan, a first voltage terminal VDD1, and the infrared sensor 101. In specific implementation, the infrared sensor 101 is used for sensing light emitted by a pixel circuit, and the pixel circuit includes a Data line Data, a first switch transistor T1, a second switch transistor T2, a light emitting diode D1, and a capacitor C1. The specific connection manner of these components is shown in fig. 1, and is not described herein again. When the grid line Scan outputs a high level, the first voltage terminal VDD1 is conducted to the infrared sensor 101. The first switch tube T1 and the second switch tube T2 are also turned on, and the Data voltage output by the Data line Data can make the light emitting diode D1 emit light, so that the infrared sensor 101 can sense the light signal and convert the light signal into a corresponding electrical signal. The electrical signal may be a voltage or a current, and the embodiment of the present invention is not limited thereto.
In this embodiment, a plurality of gate lines and a plurality of data lines may exist in a display screen of the terminal device, and it may be assumed that the plurality of gate lines are disposed horizontally and the plurality of data lines are disposed longitudinally. When the position of the infrared sensor 101 needs to be detected, a plurality of rows of gate lines may be scanned sequentially first (i.e., each row of gate lines sequentially outputs a high level). When the nth row of gate lines is scanned, for example, when the gate line Scan is scanned, if it is detected that the infrared sensor 101 senses an optical signal, it may be determined that the infrared sensor 101 is disposed corresponding to the pixel unit located in the nth row.
And then, the nth row of grid lines can be controlled to output high level, namely the grid line Scan outputs high level, and other row of grid lines all output low level, so that a plurality of rows of data lines sequentially output data voltage. When the mth column data line outputs the data voltage, if it is detected that the infrared sensor 101 senses the optical signal, it may be determined that the infrared sensor 101 is disposed corresponding to the mth column pixel unit in the nth row. It should be noted that, when the plurality of gate lines are longitudinally arranged and the plurality of data lines are transversely arranged, the specific position of the infrared sensor 101 can be detected in the same manner, and details of the embodiment of the present invention are not repeated.
In this embodiment, the infrared sensor 101 may be directly driven by using the first voltage terminal VDD1 of the display screen, and the voltage output by the gate line Scan is used as an enable signal for the operation of the infrared sensor 101, so that it is not necessary to separately set a voltage terminal and an enable terminal for the infrared sensor 101, thereby saving the cost and reducing the power consumption. At this time, referring to fig. 2, fig. 2 is a schematic circuit diagram of a terminal device according to an embodiment of the present invention.
In fig. 2, the Scan circuit 102 is a switching transistor T3, a gate of the switching transistor T3 is connected to the gate line Scan, a first electrode of the switching transistor T3 is connected to the first voltage terminal VDD1, and a second electrode of the switching transistor T3 is connected to the infrared sensor 101. The gate of the switching transistor T3 is connected to the gate line Scan, which can control the first and second poles to be turned on or off, so that the first voltage terminal VDD1 is turned on or off with respect to the infrared sensor 101. The switch transistor T3 may have a first terminal as a source and a second terminal as a drain; alternatively, the first pole may be a drain and the second pole may be a source.
In this embodiment, the terminal Device may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or the like.
Optionally, as shown in fig. 3, the scan circuit 102 includes: a switch module 1021 and a control module 1022;
the switch module 1021 is respectively connected to a gate line Scan, a first voltage terminal VDD1 and a photosensitive node PD, and is configured to control whether the first voltage terminal VDD1 is connected to the photosensitive node PD under the control of the gate line Scan;
the control module 1022 is respectively connected to the photosensitive node PD, an enable terminal EN, a second voltage terminal VDD2 and the infrared sensor 101, and is configured to control conduction between the infrared sensor 101 and the photosensitive node PD and control non-conduction between the second voltage terminal VDD2 and the infrared sensor 101 under the control of the enable terminal EN in a position detection stage;
when the infrared sensor 101 is conducted with the first voltage terminal VDD1, the infrared sensor 101 is configured to sense a received optical signal and convert the optical signal into a corresponding electrical signal.
In this embodiment, in the position detection stage, under the control of the enable terminal EN, conduction between the infrared sensor 101 and the photosensitive node PD is controlled, and non-conduction between the second voltage terminal VDD2 and the infrared sensor 101 is controlled, so that the position of the infrared sensor 101 can be determined through row scanning and column scanning. The electrical signal may be a current signal or a voltage signal, and the present embodiment is not limited thereto.
Optionally, the control module 1022 is further configured to, in a ranging phase, control conduction between the infrared sensor 101 and the photosensitive node PD under the control of the enable terminal EN, and control non-conduction between the second voltage terminal VDD2 and the infrared sensor 101;
when the infrared sensor 101 is conducted with the first voltage terminal VDD1, the infrared sensor 101 is configured to perform ranging according to the received infrared light signal and a compensation algorithm.
In this embodiment, since the position of the infrared sensor 101 on the display screen can be determined, the compensation algorithm can remove the infrared light that affects the position in the infrared light generated by the display screen, so that the infrared light received by the infrared sensor 101 is only the infrared light reflected by the obstacle after being emitted, thereby improving the detection accuracy of the infrared sensor 101 on the object approaching.
In this embodiment, under the control of the enable terminal EN, conduction between the infrared sensor 101 and the photosensitive node PD is controlled, and non-conduction between the second voltage terminal VDD2 and the infrared sensor 101 is controlled; when the infrared sensor 101 is conducted with the first voltage terminal VDD1, the infrared sensor 101 is configured to perform ranging according to the received infrared light signal and a compensation algorithm. In this way, only one power supply (i.e., the first voltage terminal VDD1) is needed to supply power, and the infrared sensor 101 can perform distance detection, thereby saving the cost of the terminal device.
Optionally, the control module 1022 is further configured to, in a ranging phase, control conduction between the second voltage terminal VDD2 and the infrared sensor 101 under the control of the enable terminal EN, and control non-conduction between the infrared sensor 101 and the photosensitive node PD;
when the infrared sensor 101 is conducted with the second voltage terminal VDD2, the infrared sensor 101 is configured to perform ranging according to the received infrared light signal and a compensation algorithm.
In this embodiment, since the position of the infrared sensor 101 on the display screen can be determined, the compensation algorithm can remove the infrared light that affects the position in the infrared light generated by the display screen, so that the infrared light received by the infrared sensor 101 is only the infrared light reflected by the obstacle after being emitted, thereby improving the detection accuracy of the infrared sensor 101 on the object approaching.
In this embodiment, under the control of the enable terminal EN, the second voltage terminal VDD2 is controlled to be conducted with the infrared sensor 101, and the infrared sensor 101 is controlled to be not conducted with the photosensitive node PD; when the infrared sensor 101 is conducted with the second voltage terminal VDD2, the infrared sensor 101 is configured to perform ranging according to the received infrared light signal and a compensation algorithm. Thus, after completing the line scanning or the column scanning, the infrared sensor 101 can work alone, and no extra power consumption of the display screen is caused.
Optionally, as shown in fig. 4, the control module 1022 includes a first control transistor T4 and a second control transistor T5;
wherein a control electrode of the first control transistor T4 is connected to the enable terminal EN, a first electrode of the first control transistor T4 is connected to the photosensitive node PD, and a second electrode of the first control transistor T4 is connected to the infrared sensor 101;
a control electrode of the second control transistor T5 is connected to the enable terminal EN, a first electrode of the second control transistor T5 is connected to the second voltage terminal VDD2, and a second electrode of the second control transistor T5 is connected to the infrared sensor 101;
the first control transistor T4 is a p-type transistor, the second control transistor T5 is an n-type transistor; alternatively, the first control transistor T4 is an n-type transistor, and the second control transistor T5 is a p-type transistor.
In this embodiment, the first control transistor T4 may be a first electrode, a source electrode, and a second electrode, a drain electrode; alternatively, the first pole may be a drain and the second pole may be a source. The second control transistor T5 may have a first terminal as a source and a second terminal as a drain; alternatively, the first pole may be a drain and the second pole may be a source.
In this embodiment, the enable terminal EN is connected to the gate of the first control transistor T4 and the gate of the second control transistor T5, so that two transistors can be controlled using one enable terminal EN. And, since the first control transistor T4 is a p-type transistor, the second control transistor T5 is an n-type transistor; alternatively, the first control transistor T4 is an n-type transistor, and the second control transistor T5 is a p-type transistor. The first control transistor T4 and the second control transistor T5 can be brought into different states (i.e. one is on and the other is off) when a suitable voltage is given through the enable terminal EN. And when the enable terminal EN gives another suitable voltage, the first control transistor T4 and the second control transistor T5 may be each switched state (i.e., on switched to off, or off switched to on).
For example, the first control transistor T4 may be a p-type transistor, and the second control transistor T5 may be an n-type transistor. When the enable terminal EN gives a lower voltage, the first control transistor T4 is turned on and the second control transistor T5 is turned off, so that a specific position of the infrared sensor 101 can be scanned by row scanning and column scanning. When the enable terminal EN gives a higher voltage, the first control transistor T4 is turned off and the second control transistor T5 is turned on, so that the infrared sensor 101 can operate in real time independently of the display screen. When the compensation algorithm is used for content compensation, infrared light which influences the position in the infrared light generated by the display screen can be removed, so that the infrared light received by the infrared sensor 101 is only the infrared light reflected by the obstacle after being transmitted, and the detection precision of the infrared sensor 101 on the object close to the infrared sensor is improved.
Similarly, when the first control transistor T4 is an n-type transistor and the second control transistor T5 is a p-type transistor, different voltages need to be provided at the enable terminal EN, and the first control transistor T4 and the second control transistor T5 can also be controlled, which is not described again in this embodiment.
Optionally, the infrared sensor 101 is integrated on the lower surface of the display screen.
In this embodiment, the infrared sensor 101 is integrated under the screen of the display screen, so that the error of the infrared sensor 101 can be reduced.
Optionally, as shown in fig. 5, the scan circuit 102 further includes a sampling module 1023; the sampling module 1023 is used for sampling the electric signal output by the infrared sensor 101.
In this embodiment, the sampling module 1023 may sample the electric signal output by the infrared sensor 101 and may detect a change in the electric signal. Some simple processing may also be performed before the results are sent to the processor. Thus, the processor can determine the position of the infrared sensor 101 according to the magnitude of the detected electric signal or the magnitude of the change of the electric signal. Of course, the sampling module 1023 may be an analog-to-digital converter. It should be noted that the sampling module 1023 can also be applied to fig. 1 to 3 and used for sampling the electrical signal output by the infrared sensor 101.
When the switch module 1021 includes the switch transistor T3 and the sampling module is an analog-to-digital converter ADC, the circuit diagram shown in fig. 6 can be referred to. It should be noted that, when the infrared sensor 101 includes the infrared receiving diode D2, it can also be applied to fig. 1 to 4.
For a better understanding of the overall process, reference may also be made to the following working process. The working principle is illustrated in line scanning. The working principle is illustrated in line scanning. Assuming that the grid line Scan outputs a scanning signal of the ith row of the display screen, the light emitting diode D1 is one of the corresponding pixels, and the infrared receiving diode D2 is one of the infrared receiving tubes integrated on the lower surface of the display screen. There is now a need to determine the position of the ir receiving diode D2 on the display screen (i.e., the corresponding pixel position, which provides greater accuracy for the compensation algorithm).
When the terminal equipment is placed in a dark environment (external ambient light is prevented from being received by the infrared receiving diode D2 through the screen and the positioning of the position is influenced), the processor controls the enable terminal EN to output a high level, at the moment, the second control transistor T5 is closed, and a power supply path from an external independent power supply (the second voltage terminal VDD2) to the infrared receiving diode D2 is cut off; the first control transistor T4 is turned on.
One frame of image of the display screen is scanned to the ith row, the grid line Scan is selected, the first switch tube T1 is turned on, the Data voltage output by the Data line Data controls the drain current of the second switch tube T2 through the first switch tube T1 (the power supply is the first voltage end VDD1), and the light-emitting diode D1 is driven to start emitting light.
The gate line Scan is selected, the switching transistor T3 is turned on, since the first control transistor T4 is already turned on, the first voltage terminal VDD1 supplies power to the ir receiving diode D2 (at this time, the row Scan signal output by the gate line Scan is the only control signal that can make the led D1 and the ir receiving diode D2 operate simultaneously), the ir receiving diode D2 starts to operate, by detecting the light emitted by the led D1, the current carriers in the ir receiving diode D2 increase, the current becomes large, the analog-to-digital converter ADC detects the current change, and after signal processing, the current change is sent to the processor, and the time recorded in the processor at this time is T. At the same time, the display screen sends the information that the ith line is scanning at time t to the processor through a line synchronization signal TE.
To sum up, at time t, except for the content of the grid line Scan in the ith row, all the rest rows do not emit light and are black, and the grid line Scan also controls the infrared receiving diode D2 to receive the unique light source. Thus, at the same time t, the processor receives the information of the infrared receiving diode D2 and the scanning of the ith row at the same time, and knows the position information of the ith row on the screen of the infrared receiving diode D2. The column scanning process is also similar as above. Thus, the accurate position information of the infrared receiving diode D2 on the screen can be known.
After the position of the infrared receiving diode D2 is located, the pixel display content of each frame at the position of the infrared receiving diode D2 can be accurately known during normal operation. When content compensation is performed, calculation can be performed accurately for the content received by the infrared receiving diode D2, so that the detection accuracy of the infrared sensor 101 is higher.
The terminal device comprises a display screen and an infrared sensor 101 arranged on the display screen, wherein the infrared sensor 101 comprises an infrared transmitting tube and an infrared receiving tube, the infrared sensor 101 is positioned below the display screen and faces the display screen, the display screen is provided with a scanning circuit 102, and the scanning circuit 102 is used for detecting the position of the infrared sensor 101 on the display screen. In this way, by determining the position of the infrared sensor 101 on the display screen by the scanning circuit 102, the accurate position of the infrared sensor 101 on the display screen can be obtained, so that the detection accuracy of the infrared sensor 101 on the approaching object can be improved.
Referring to fig. 7, fig. 7 is a flowchart of a photosensitive detection method provided in an embodiment of the present invention, and is applied to the terminal, as shown in fig. 7, including the following steps:
703, controlling the nth row of gate lines to output an effective level, controlling multiple rows of data lines to sequentially output data voltages, detecting an electric signal output by the infrared sensor, judging whether the electric signal value of the electric signal is within the preset electric signal value range, and determining that the infrared sensor is arranged corresponding to the current data line outputting the data voltages when the electric signal value is not within the preset electric signal value range, so as to obtain a position detection result of the infrared sensor arranged corresponding to the nth row and mth column of pixel units included in the display screen; n and M are both positive integers.
In this embodiment, since the nth row of gate lines outputs an active level, the infrared sensor can detect an optical signal. When the data voltage is output by the Mth column data line, besides the ambient light signal, the infrared sensor can also detect the light signal emitted by the pixel unit of the Nth row and the Mth column. Thus, the infrared sensor outputs an electric signal value of the electric signal that is not within the predetermined electric signal value range. Therefore, the position detection result of the infrared sensor corresponding to the Nth row and Mth column pixel unit included in the display screen can be determined.
Optionally, a ranging phase is further included after the position detection phase; the photosensitive detection method further comprises the following steps:
in the distance measuring stage, when the Nth row of grid lines are scanned, the Mth column of data lines output Mth data voltage, the switch module controls the conduction between the first voltage end and the photosensitive node under the control of the Nth row of grid lines, the infrared sensor senses the received real-time infrared light signal, and the infrared light signal reflected by the obstacle is obtained according to the real-time infrared light signal and a compensation algorithm;
and measuring the distance according to the infrared light signals reflected by the obstacles.
In this embodiment, since the positions of the infrared sensor and the pixel unit corresponding to the infrared sensor can be determined, and the real-time infrared signal includes the infrared signal sent by the pixel unit and the infrared signal reflected by the obstacle, the infrared sensor can perform some processing on the received real-time infrared signal, so as to obtain the infrared signal reflected by the obstacle. For example, according to the compensation algorithm, the infrared light signals of the pixel units corresponding to the infrared sensor in the real-time infrared light signals are removed, so that the detection accuracy of the infrared sensor on the approaching object is improved. Or, some correction algorithms can be used to remove the real-time infrared light signal and the infrared light signal of the pixel unit corresponding to the infrared sensor, so as to improve the detection accuracy of the infrared sensor on the approaching object.
Optionally, the photosensitive detection method further includes:
in the position detection stage, the control module controls the infrared sensor to be conducted with the photosensitive node under the control of the enabling end, and controls the second voltage end to be not conducted with the infrared sensor.
Optionally, the photosensitive detection method further includes:
in the distance measuring stage, the control module controls the infrared sensor to be conducted with the photosensitive node under the control of the enabling end, and controls the second voltage end to be not conducted with the infrared sensor;
or, in the ranging stage, the control module controls the second voltage end to be conducted with the infrared sensor under the control of the enable end, and controls the infrared sensor to be not conducted with the photosensitive node.
In the different embodiments, the scanning circuit of the terminal device includes a control module, and the light sensing node is connected to the infrared sensor through the control module. The control process in different embodiments has already been described in detail in the foregoing embodiments, and is not described herein again.
In the position detection stage, the environment optical signal sensed by the infrared sensor is controlled to be within a preset optical signal range, so that the electric signal value of the environment photoelectric signal obtained by converting the environment optical signal by the infrared sensor is within the preset electric signal value range; scanning a plurality of rows of grid lines included by the terminal in sequence, detecting whether the infrared sensor outputs an electric signal or not, and determining that the infrared sensor is arranged corresponding to the currently scanned Nth row of grid lines when the infrared sensor outputs the electric signal; controlling the Nth row of grid lines to output effective levels, controlling a plurality of rows of data lines to sequentially output data voltages, detecting an electric signal output by the infrared sensor, judging whether the electric signal value of the electric signal is within a preset electric signal value range, and when the electric signal value is not within the preset electric signal value range, determining that the infrared sensor is arranged corresponding to the data line currently outputting the data voltages, so as to obtain a position detection result of the infrared sensor corresponding to the Nth row of Mth row of pixel units included in the display screen; n and M are both positive integers. The embodiment of the invention can accurately detect the position of the infrared sensor on the display screen, thereby improving the detection precision of the infrared sensor on the approaching object.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (11)
1. A terminal device is characterized by comprising a display screen and an infrared sensor arranged on the display screen, wherein the infrared sensor comprises an infrared transmitting tube and an infrared receiving tube, the infrared sensor is positioned below the display screen and faces the display screen, the display screen is provided with a scanning circuit, and the scanning circuit is used for detecting the position of the infrared sensor on the display screen;
the scanning circuit includes: the device comprises a switch module and a control module;
the switch module is respectively connected with a grid line, a first voltage end and a photosensitive node and is used for controlling whether the first voltage end is conducted with the photosensitive node or not under the control of the grid line;
the control module is respectively connected with the photosensitive node, the enabling end, the second voltage end and the infrared sensor and is used for controlling the conduction between the infrared sensor and the photosensitive node and controlling the non-conduction between the second voltage end and the infrared sensor under the control of the enabling end in the position detection stage;
when the infrared sensor is conducted with the first voltage end, the infrared sensor is used for sensing the received optical signal and converting the optical signal into a corresponding electric signal.
2. The terminal device of claim 1, wherein the switching module comprises a switching transistor;
the control electrode of the switch transistor is connected with the grid line, the first electrode of the switch transistor is connected with the first voltage end, and the second electrode of the switch transistor is connected with the photosensitive node.
3. The terminal device according to claim 1, wherein the control module is further configured to control conduction between the infrared sensor and the light sensing node and control non-conduction between the second voltage terminal and the infrared sensor under the control of the enable terminal in a ranging phase;
when the infrared sensor is conducted with the first voltage end, the infrared sensor is used for ranging according to the received infrared light signal and a compensation algorithm.
4. The terminal device according to claim 1, wherein the control module is further configured to control conduction between the second voltage terminal and the infrared sensor and control non-conduction between the infrared sensor and the light sensing node under the control of the enable terminal in a ranging phase;
and when the infrared sensor is conducted with the second voltage end, the infrared sensor is used for ranging according to the received infrared light signal and a compensation algorithm.
5. The terminal device of claim 4, wherein the control module comprises a first control transistor and a second control transistor;
a control electrode of the first control transistor is connected with the enable end, a first electrode of the first control transistor is connected with the photosensitive node, and a second electrode of the first control transistor is connected with the infrared sensor;
a control electrode of the second control transistor is connected with the enable end, a first electrode of the second control transistor is connected with the second voltage end, and a second electrode of the second control transistor is connected with the infrared sensor;
the first control transistor is a p-type transistor, and the second control transistor is an n-type transistor; or, the first control transistor is an n-type transistor, and the second control transistor is a p-type transistor.
6. The terminal device according to any one of claims 1 to 5, wherein the infrared sensor is integrated on a lower surface of the display screen.
7. The terminal device of any of claims 1-5, wherein the scanning circuit further comprises a sampling module; the sampling module is used for sampling the electric signal output by the infrared sensor.
8. A light sensing method applied to the terminal device according to any one of claims 1 to 7, comprising:
in the position detection stage, controlling an ambient light signal sensed by the infrared sensor to be within a preset light signal range, so that an electric signal value of an ambient photoelectric signal obtained by converting the ambient light signal by the infrared sensor is within a preset electric signal value range;
scanning a plurality of rows of grid lines included by the terminal in sequence, detecting whether the infrared sensor outputs an electric signal or not, and determining that the infrared sensor is arranged corresponding to the currently scanned Nth row of grid lines when the infrared sensor outputs the electric signal;
controlling the Nth row of grid lines to output effective levels, controlling a plurality of rows of data lines to sequentially output data voltages, detecting an electric signal output by the infrared sensor, judging whether the electric signal value of the electric signal is within a preset electric signal value range, and when the electric signal value is not within the preset electric signal value range, determining that the infrared sensor is arranged corresponding to the data line currently outputting the data voltages, so as to obtain a position detection result of the infrared sensor corresponding to the Nth row of Mth row of pixel units included in the display screen; n and M are both positive integers.
9. A photosensitive detection method according to claim 8, further comprising a ranging phase after the position detection phase; the photosensitive detection method further comprises the following steps:
in the distance measuring stage, when the Nth row of grid lines are scanned, the Mth column of data lines output Mth data voltage, the switch module controls the conduction between the first voltage end and the photosensitive node under the control of the Nth row of grid lines, the infrared sensor senses the received real-time infrared light signal, and the infrared light signal reflected by the obstacle is obtained according to the real-time infrared light signal and a compensation algorithm;
and measuring the distance according to the infrared light signals reflected by the obstacles.
10. The photosensitive detection method according to claim 9, further comprising:
in the position detection stage, the control module controls the infrared sensor to be conducted with the photosensitive node under the control of the enabling end, and controls the second voltage end to be not conducted with the infrared sensor.
11. The photosensitive detection method according to claim 10, further comprising:
in the distance measuring stage, the control module controls the infrared sensor to be conducted with the photosensitive node under the control of the enabling end, and controls the second voltage end to be not conducted with the infrared sensor;
or, in the ranging stage, the control module controls the second voltage end to be conducted with the infrared sensor under the control of the enable end, and controls the infrared sensor to be not conducted with the photosensitive node.
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