CN112650407A

CN112650407A - Display screen and electronic equipment

Info

Publication number: CN112650407A
Application number: CN201910965214.5A
Authority: CN
Inventors: 崔旭旺; 杨东华; 汤福明
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2021-04-13

Abstract

The disclosure relates to a display screen and an electronic device, and belongs to the technical field of electronics. The display screen comprises a touch layer, a liquid crystal layer, a light receiving module and a processing module, wherein the light receiving module is connected with the processing module; the liquid crystal layer is positioned on the inner side of the touch layer, and the light receiving module is positioned on the inner side of the liquid crystal layer; the light receiving module comprises a visible light receiving unit for receiving visible light, a detection unit for detecting the light intensity of the visible light and a first sending unit for sending a first signal to the processing module; visible light rays pass through the touch layer and the liquid crystal layer to reach the light receiving module; the processing module comprises a first processing unit for determining the intensity of the light carried by the first signal; the visible light receiving unit is connected with the detection unit, the detection unit is connected with the first sending unit, and the first sending unit is connected with the first processing unit, so that the display screen can sense the light intensity of the external environment, a light sensor is not required to be additionally arranged, and the occupied space is reduced.

Description

Display screen and electronic equipment

Technical Field

The present disclosure relates to the field of electronic technologies, and in particular, to a display screen and an electronic device.

Background

With the rapid development of electronic technology, users can not leave the electronic devices in daily life, and the functional requirements on the electronic devices are increased day by day. Correspondingly, the electronic equipment is provided with a plurality of types of electronic devices, and different functions are realized through different types of electronic devices, so that the functional requirements of users are met.

The electronic equipment comprises a display screen and a shell, wherein the display screen is arranged on the shell. The display screen includes a touch layer and a liquid crystal layer, the liquid crystal layer being positioned inside the touch layer. In addition, the electronic equipment can also comprise a light sensor, the light sensor is positioned on the surface of the shell, the light sensor can receive light of the external environment and detect the light intensity of the light, so that the processing can be carried out according to the light intensity.

Since the light sensor needs to receive light from the external environment, the light sensor cannot be disposed inside the electronic device, but needs to be disposed on the surface of the housing, for example, above the display screen of the electronic device. However, the light sensor occupies a space, which limits the size of the display screen.

Disclosure of Invention

The present disclosure provides a display screen and an electronic device, which can overcome the problems existing in the related art, and the technical scheme is as follows:

in a first aspect, a display screen is provided, including a touch layer, the display screen including:

the liquid crystal display panel comprises a liquid crystal layer, a light receiving module and a processing module, wherein the light receiving module is connected with the processing module;

the liquid crystal layer is positioned on the inner side of the touch layer, and the light receiving module is positioned on the inner side of the liquid crystal layer;

the light receiving module comprises a visible light receiving unit for receiving visible light, a detecting unit for detecting the light intensity of the visible light and a first sending unit for sending a first signal to the processing module; the visible light rays pass through the touch layer and the liquid crystal layer to reach the light ray receiving module, and the first signal carries the light ray intensity;

the processing module comprises a first processing unit for determining the intensity of the light carried by the first signal;

the visible light receiving unit is connected with the detection unit, the detection unit is connected with the first sending unit, and the first sending unit is connected with the first processing unit.

In a possible implementation manner, the processing module further includes a control unit configured to determine display brightness according to the light intensity and control the liquid crystal layer to display according to the display brightness, and the control unit is connected to the first processing module.

In another possible implementation manner, the control unit is further configured to determine the display brightness corresponding to the light intensity according to the light intensity and a stored correspondence between the light intensity and the display brightness.

In another possible implementation manner, the liquid crystal layer comprises a light emitting unit for emitting invisible first light, and a second sending unit for sending a second signal to the processing module;

the light receiving module comprises an invisible light receiving unit for receiving invisible second light and a third sending unit for sending a third signal to the processing module; the second light ray is obtained by reflecting the first light ray on the surface of the obstacle;

the processing module comprises a second processing unit for determining a distance between the display screen and the obstacle based on a difference in reception time of the second signal and the third signal;

the light emitting unit is connected with the second sending unit, and the second sending unit is connected with the second processing unit;

the invisible light receiving unit is connected with the third transmitting unit, and the third transmitting unit is connected with the second processing unit.

In another possible implementation form of the method,

the touch layer comprises a plurality of capacitance sensing elements and a fourth sending unit, the capacitance sensing elements are used for obtaining current generated by capacitance coupling with a human body part in a sensing range of the display screen, the fourth sending unit is used for sending a fourth signal to the processing module, and the fourth signal carries the current value of the current;

the processing module comprises a third processing unit for determining the type of the human body part according to the received fourth signal;

the plurality of capacitive sensing elements are connected with the fourth sending unit, and the fourth sending unit is connected with the third processing unit.

In another possible implementation manner, the light receiving module is located at a first end of the inner side surface of the liquid crystal layer.

In another possible implementation, the first end is an upper end of the display screen.

In a second aspect, there is provided an electronic device comprising a display screen as described in the first aspect.

In a third aspect, a display screen is provided, including a touch layer, the display screen further including: the liquid crystal display panel comprises a liquid crystal layer, a light receiving module and a processing module, wherein the light receiving module is connected with the processing module;

the liquid crystal layer comprises a light emitting unit for emitting invisible first light and a second sending unit for sending a second signal to the processing module;

In a fourth aspect, there is provided an electronic device comprising a display screen according to the third aspect.

The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:

the display screen provided by the embodiment of the disclosure comprises a touch layer, a liquid crystal layer, a light receiving module and a processing module, wherein the light receiving module is connected with the processing module; the liquid crystal layer is positioned on the inner side of the touch layer, and the light receiving module is positioned on the inner side of the liquid crystal layer; the light receiving module comprises a visible light receiving unit for receiving visible light, a detection unit for detecting the light intensity of the visible light and a first sending unit for sending a first signal to the processing module; visible light rays pass through the touch layer and the liquid crystal layer to reach the light receiving module, and the first signal carries the light ray intensity; the processing module comprises a first processing unit for determining the intensity of the light carried by the first signal; the visible light receiving unit is connected with the detection unit, the detection unit is connected with the first sending unit, and the first sending unit is connected with the first processing unit. Therefore, the display screen can sense the light intensity of the external environment, the function of the light sensor is realized, the light sensor does not need to be additionally arranged, the occupied space is reduced, and the limitation to the size of the display screen is avoided. In addition, the light receiving module is arranged on the inner side of the liquid crystal layer, so that the normal display of the display screen cannot be influenced.

In the related art, the sensor is usually configured with an independent processing unit, and in the embodiment of the disclosure, the light receiving module is connected with the processing module of the display screen, so that the function of the light sensor can be realized, the independent processing unit does not need to be additionally configured, the occupied space is reduced, and the hardware cost is saved.

In addition, the display screen can also acquire the distance between the display screen and the barrier, the function of the distance sensor is realized, the distance sensor does not need to be additionally arranged, the occupied space is reduced, and the limitation to the size of the display screen is avoided. In addition, when the function of the distance sensor is realized, invisible light is emitted by the liquid crystal layer, and the normal display of the display screen cannot be influenced.

In addition, the display screen can also determine the type of the close human body part, so that the function of an SAR (Specific Absorption Rate) sensor is realized, the SAR sensor does not need to be additionally arranged, the occupied space is reduced, and the limitation to the size of the display screen is avoided.

In addition, the display screen can realize the function of light sensor simultaneously, the function of distance sensor and the function of SAR sensor, the function of display screen has been increased, need not additionally to set up these three kinds of sensors, the space that has reduced the occupation, avoid causing the restriction to the size of display screen, electronic equipment's space has been saved greatly, help improving electronic equipment's screen to account for the ratio, realize the full face screen, and can also reduce electronic equipment's size, and convenient to carry and use, the electromagnetic interference to other parts production because of disposing multiple sensor has also been avoided, need not to debug electronic equipment.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a schematic diagram illustrating the structure of a display screen in accordance with an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating the structure of a display screen in accordance with an exemplary embodiment;

FIG. 3 is a schematic diagram illustrating the structure of a display screen in accordance with an exemplary embodiment;

fig. 4 is a schematic structural diagram of an electronic device according to an exemplary embodiment.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

Fig. 1 is a schematic structural diagram illustrating a display screen according to an exemplary embodiment, and referring to fig. 1, a display screen 100 includes: the liquid crystal display panel comprises a touch layer 101, a liquid crystal layer 102, a light receiving module 103 and a processing module 104, wherein the light receiving module 103 is connected with the processing module 104.

The touch layer 101 and the liquid crystal layer 102 have optical transparency, and the liquid crystal layer 102 is located inside the touch layer 101, that is, the touch layer 101 and the liquid crystal layer 102 are both made of materials with certain transparency, such as glass, plastic, and the like, and light can pass through the touch layer 101 and the liquid crystal layer 102. Wherein, the higher the transparency of any structure, the more the structure approaches to transparency. For example, the transparency may be 15% or 30%.

The touch layer 101 and the liquid crystal layer 102 are respectively connected to the processing module 104, a user can perform a touch operation on the touch layer 101, and the touch layer 101 is configured to detect the touch operation, generate a corresponding touch signal, and send the touch signal to the processing module 104. The liquid crystal layer 102 is used to display an image, and a user can view the image displayed by the liquid crystal layer 102 through the touch layer 101. The processing module 104 is configured to receive a touch signal sent by the touch layer 101, and control the liquid crystal layer 102 according to the touch signal, or may also control the liquid crystal layer 102 in another manner, so as to control content displayed by the liquid crystal layer 102, display brightness, or other parameters of the liquid crystal layer 102.

The display function and the touch function of the display screen 100 can be realized by the mutual cooperation of the touch layer 101, the liquid crystal layer 102 and the processing module 104.

With respect to the liquid crystal layer 102: the liquid crystal layer 102 includes a first polarizer, a first cover plate, liquid crystal molecules, a second cover plate, and a second polarizer, which are sequentially arranged from the outside to the inside, the liquid crystal molecules may be PDLC (polymer dispersed liquid crystal) or other materials, and the first polarizer, the first cover plate, the second cover plate, and the second polarizer also have light transmittance.

When the processing module 104 controls the liquid crystal layer 102, a voltage may be applied to the liquid crystal layer 102, and the liquid crystal molecules rotate under the action of the voltage, so that the light transmittance of the liquid crystal molecules changes, and the display brightness of the liquid crystal layer 102 is further changed.

In one possible implementation, the first polarizer is made of a fully transparent material, the second polarizer is made of a fully transparent material or a semi-transparent material, and the liquid crystal layer 102 may be a fully transmissive type or a semi-transmissive type according to the material of the second polarizer.

With respect to the processing module 104 described above: the processing module 104 is a chip or other device having a processing function, and may be, for example, an FPC (Flexible Printed Circuit).

Considering that the light sensor occupies a space above the display screen 100 and limits the size of the display screen 100, in order to reduce the occupied space as much as possible, the embodiment of the present disclosure provides a solution for implementing the light sensor on the display screen 100.

For this purpose, a light receiving module 103 is disposed in the display screen 100, the light receiving module 103 is located inside the liquid crystal layer 102, and the light receiving module 103 is connected to the processing module 104. Since the touch layer 101 and the liquid crystal layer 102 have light transmittance, light of an external environment can pass through the touch layer 101 and the liquid crystal layer 102 to reach the light receiving module 103. The light receiving module 103 is configured to receive light from an external environment, detect light intensity of the light, and send a first signal to the processing module 104, where the first signal carries the light intensity, and the processing module 104 is configured to receive the first signal and determine the light intensity.

The light receiving module 103 includes a visible light receiving unit for receiving visible light, a detecting unit for detecting light intensity of the visible light, and a first sending unit for sending a first signal to the processing module, and the processing module 104 includes a first processing unit for determining light intensity carried by the first signal. The visible light receiving unit is connected with the detection unit, the detection unit is connected with the first sending unit, and the first sending unit is connected with the first processing unit.

Through the mutual cooperation of the touch layer 101, the liquid crystal layer 102, the light receiving module 103 and the processing module 104, the light intensity of the external environment is determined, so that the function of the light sensor is realized, and corresponding processing operation can be subsequently performed based on the light intensity of the external environment. And an additional light sensor is not needed, so that the occupied space is reduced, and the limitation on the size of the display screen 100 is avoided. In addition, the light receiving module 103 is disposed inside the liquid crystal layer 102, which does not affect the normal display of the display screen 100.

In a possible implementation manner, the light receiving module 103 may include a photo-resistance element, and when the light intensities of the light received by the photo-resistance element are different, the resistance value may also change accordingly, so as to cause a change of the current value, and therefore, the light receiving module 103 may obtain the light intensity by detecting the current value of the photo-resistance element.

In one possible implementation, the touch layer 101 and the liquid crystal layer 102 are equal in size, and the light receiving module 103 may be equal in size to the touch layer 101 and the liquid crystal layer 102, as shown in fig. 1, or the light receiving module 103 may be smaller in size than the touch layer 101 and the liquid crystal layer 102, as shown in fig. 2 and 3.

In another possible implementation, the inner side surface of the liquid crystal layer 102 includes a first end and a second end, and the light receiving module 103 is located at the first end of the inner side surface of the liquid crystal layer 102. Wherein the first end may be an upper end or a lower end of the display screen 100,

as shown in fig. 2 and 3, the upper end of the display screen 100 refers to an end of the display screen 100 located above the display screen 100 when the display screen 100 is displayed in the forward direction, and the lower end of the display screen 100 refers to an end of the display screen 100 located below the display screen 100 when the display screen 100 is displayed in the forward direction.

In one possible implementation, the display screen 100 may further include a cover plate 105, and the cover plate 105 is used to protect the display screen 100. The cover plate 105 is located at an outer side of the touch layer 101, that is, the cover plate 105 is located at an outermost side of the display screen 100. The cover plate 105 may be made of a light-transmitting material such as glass or plastic, which can protect the display screen 100 and does not affect the display function of the display screen 100.

The display screen that this disclosed embodiment provided includes touch layer, liquid crystal layer, light receiving module and processing module, and touch layer, liquid crystal layer, light receiving module are connected with processing module respectively, and touch layer and liquid crystal layer all have the light transmissivity, and the liquid crystal layer is located the inboard on touch layer, and light receiving module is located the inboard of liquid crystal layer. External environment's light can pass touch layer and liquid crystal layer and reach light receiving module, and light receiving module can acquire light intensity and send to processing module according to received light, therefore the display screen can the perception external environment light intensity, has realized light sensor's function, need not additionally to set up light sensor, has reduced the space that occupies, avoids causing the restriction to display screen's size. In addition, the light receiving module is arranged on the inner side of the liquid crystal layer, so that the normal display of the display screen cannot be influenced.

In the related art, the sensor is usually configured with an independent processing unit, and in the embodiment of the disclosure, the light receiving module is connected with the processing module of the display screen, so that the function of the light sensor can be realized, the processing unit does not need to be additionally configured, the occupied space is reduced, and the hardware cost is saved.

In one possible implementation, the light intensity represents the brightness of the external environment, and the display brightness is greater than the brightness of the external environment, so as to ensure that the user can clearly see the display content of the display screen 100. For example, the display luminance is 1.1 times the luminance of the external environment. Therefore, the display brightness of the display screen 100 can be determined according to the light intensity, so that the display brightness meets the user requirement.

For this purpose, the processing module 104 is further configured to determine a display brightness according to the light intensity, and control the liquid crystal layer 102 to display according to the display brightness. Wherein, the light intensity and the display brightness are in positive correlation. The greater the light intensity, the greater the display brightness; the smaller the light intensity, the smaller the display brightness.

In one possible implementation manner, the processing module 104 stores a corresponding relationship between the light intensity and the display brightness of the liquid crystal layer 102. The processing module 104 is further configured to determine the display brightness corresponding to the light intensity according to the light intensity and the corresponding relationship when the light intensity is obtained.

The corresponding relation can be expressed in a form of a preset algorithm, and when the light intensity is obtained, the preset algorithm is adopted to calculate the display brightness corresponding to the light intensity.

Alternatively, the correspondence may be expressed in the form of a correspondence table. After the light intensity is obtained, the corresponding relation is inquired according to the light intensity, and the display brightness corresponding to the light intensity can be obtained. Or, different light intensity intervals correspond to different display brightness. After the light intensity is obtained, the light intensity interval to which the light intensity belongs is determined, and the corresponding relation is inquired according to the light intensity interval, so that the display brightness corresponding to the light intensity can be obtained.

After the processing module 104 determines the display brightness, the voltage applied to the liquid crystal layer 102 is adjusted according to the display brightness, and the liquid crystal molecules rotate according to the adjusted voltage, so that the display brightness of the liquid crystal layer 102 is adjusted, and the liquid crystal layer 102 displays according to the display brightness.

In one possible implementation manner, the processing module 104 includes a control unit for determining display brightness according to the light intensity and controlling the liquid crystal layer to display according to the display brightness, and the control unit is connected to the first processing unit. The above scheme of determining the display brightness according to the light intensity is implemented by the control unit in the processing module 104. For example, the control unit is configured to determine the display brightness corresponding to the light intensity according to the light intensity and the stored correspondence between the light intensity and the display brightness.

Considering that the distance sensor occupies a space above the display screen 100 and limits the size of the display screen 100, in order to reduce the occupied space as much as possible, the embodiment of the present disclosure further provides a solution for implementing the distance sensor on the display screen 100.

In one possible implementation, the liquid crystal layer 102 is configured to emit a first invisible light, and to emit a second signal to the processing module 104; the light receiving module 103 is configured to receive a second light reflected by the barrier after the first light is emitted to the barrier, and emit a third signal to the processing module 104; the processing module 104 receives the second signal and the third signal, and determines a distance between the display screen 100 and the obstacle based on a difference in reception time of the second signal and the third signal.

The second light is obtained by reflecting the first light after the first light is emitted to the obstacle, so that the wavelength of the second light is the same as that of the first light.

In one possible implementation, the liquid crystal layer 102 emits invisible light with a certain fixed wavelength, and when the light receiving module 103 receives one or more light beams, the second light beam is identified according to the wavelength of each light beam, and a third signal is emitted to the processing module 104 without processing the light beams with other wavelengths.

When receiving the second signal, the processing module 104 records a first time point of receiving the second signal, and when receiving the third signal, the processing module 104 records a second time point of receiving the third signal, obtains a difference between the first time point and the second time point, calculates a product of the difference and the propagation speed of the first light, and obtains a quotient of the product and 2, thereby obtaining the distance between the display screen 100 and the obstacle.

The distance between the display screen 100 and the obstacle is determined by the mutual cooperation of the touch layer 101, the liquid crystal layer 102, the light receiving module 103 and the processing module 104, thereby implementing the function of a distance sensor. Corresponding processing operations may then be performed based on the distance between the display screen 100 and the obstacle.

For example: when a user answers a call by using the electronic device provided with the display screen 100, the head of the user approaches the display screen 100, and at the moment, the display screen 100 is closed when the distance from an obstacle (the head of the user) is detected to be small; after the call is answered, the head of the user is far away from the display screen 100, and the display screen 100 is lightened when the distance between the user and the obstacle is larger.

In one possible implementation, the liquid crystal layer 102 includes a light emitting unit for emitting invisible first light, a second sending unit for sending a second signal to the processing module 104; the light receiving module 103 includes an invisible light receiving unit for receiving invisible second light and a third transmitting unit for transmitting a third signal to the processing module 104; the second light ray is the light ray obtained by reflecting the first light ray on the surface of the barrier; the processing module 104 includes a second processing unit for determining a distance between the display screen and the obstacle based on a difference in reception time of the second signal and the third signal; the light emitting unit is connected with the second sending unit, and the second sending unit is connected with the second processing unit; the invisible light receiving unit is connected with the third transmitting unit, and the third transmitting unit is connected with the second processing unit.

The liquid crystal layer 102, the light receiving module 103 and the processing module 104 are implemented by a plurality of units in the liquid crystal layer 102, the light receiving module 103 and the processing module 104.

In the display screen provided by the embodiment, the liquid crystal layer is used for emitting invisible first light and emitting a second signal to the processing module; the light receiving module is used for receiving second light rays obtained by reflecting the first light rays on the surface of the obstacle and transmitting a third signal to the processing module; the processing module receives the second signal and the third signal, and determines the distance between the display screen and the obstacle based on the receiving time difference of the second signal and the third signal. Therefore, the distance between the display screen and the barrier can be acquired, the function of the distance sensor is achieved, the distance sensor does not need to be additionally arranged, occupied space is reduced, and limitation to the size of the display screen is avoided. In addition, when the function of the distance sensor is realized, invisible light is emitted by the liquid crystal layer, and the normal display of the display screen cannot be influenced.

In one possible implementation, the light receiving module 103 can receive both visible light and invisible light. That is, the light receiving module 103 may receive both visible light rays to implement the function of the light sensor and invisible light rays to implement the function of the distance sensor. The light receiving module 104 includes a visible light receiving unit for receiving visible light and an invisible light receiving unit for receiving invisible light. That is, after receiving the light, the visible light receiving unit processes only the visible light and does not process other light. The invisible light receiving unit processes only invisible light rays and does not process other light rays after receiving the light rays.

In one possible implementation, the visible light receiving unit may recognize the visible light according to a wavelength of the visible light, and the invisible light receiving unit may recognize the invisible light according to a wavelength of the invisible light.

For example, the visible light receiving unit processes the light having a wavelength in a range of 380 nm to 760 nm when receiving the light. And the invisible light receiving unit processes the light rays when receiving the light rays with the wavelength within the range of 780 nanometers to 1 millimeter.

In another possible implementation manner, the invisible light receiving unit only processes invisible light rays with a certain fixed wavelength, and the wavelength is equal to the wavelength of the invisible light rays emitted by the liquid crystal layer 102, so that it is ensured that the light rays received by the invisible light receiving unit are second light rays reflected back by the obstacle after being emitted by the liquid crystal layer 102.

In the display screen provided by this embodiment, the light receiving module includes a visible light receiving unit and a second receiving unit, the visible light receiving unit is configured to receive visible light, and the invisible light receiving unit is configured to receive invisible light. The light receiving module can receive visible light to detect the light intensity of the external environment, and can receive invisible light to obtain the distance between the display screen and the barrier in front of the display screen, so that the display screen has the functions of the light sensor and the distance sensor, the light sensor and the distance sensor are not required to be additionally arranged, the occupied space is reduced, and the limitation to the size of the display screen is avoided.

In the related art, the sensors generate electromagnetic interference to other components, and the more the sensors are, the more the electromagnetic interference is serious. In the embodiment of the disclosure, the light sensor and the distance sensor are not required to be additionally arranged, so that the electromagnetic interference of the sensor to other parts is avoided.

When different types of human body parts are close to the display screen 100, the display screen 100 may perform corresponding processing according to the types of the human body parts. It is therefore necessary to identify the type to which the body part belongs.

In the related art, the electronic device may be configured with a SAR (Specific Absorption Rate) sensor, and the SAR sensor may be used to identify the type of the human body part.

In the display screen 100, the touch layer 101 includes a plurality of capacitive sensing elements for obtaining a current generated by capacitive coupling with a human body part within a sensing range of the display screen 100, and a fourth sending unit for sending a fourth signal to the processing module 104, where the fourth signal carries a current value of the current; the processing module 104 includes a third processing unit for determining the type of the human body part according to the received fourth signal, and the functions of the SAR sensor are realized by the mutual cooperation of the plurality of units.

Since the human body part carries current and the touch layer 101 carries current, when the human body part approaches the display screen 100, the human body part is in the sensing range of the touch layer 101 and forms a coupling capacitance with the touch layer 101, which causes the capacitance value of the touch layer 101 to change.

When the capacitance value of the touch layer 101 changes, the current value of the touch layer 101 changes accordingly. The fourth transmitting unit transmits the changed current value to the third processing unit. And the third processing unit determines the type of the human body part according to the current value.

In one possible implementation, the third processing unit determines the type to which the human body part belongs according to the area of the relative area between the human body part and the touch layer 101. When the size of the human body part is larger than that of the touch layer 101, the area of the opposite region is the area of the touch layer 101, and when the size of the human body part is smaller than that of the touch layer 101, the area of the opposite region is the area of the human body part.

When different types of human body parts are located within the sensing range of the touch layer 101, the areas of the regions facing the human body parts within the sensing range of the touch layer 101 and the touch layer 101 are different, so that the capacitance value of the touch layer 101 is affected differently, and the current value is affected differently. The area of the opposite region between the human body part and the touch layer 101 can be determined according to the current value of the touch layer 101, and the type to which the human body part belongs can be determined according to the area. For example, when the current value is small, it is determined that the area of the relative region between the human body part and the touch layer 101 is small, the human body part is determined to be a human hand, and the user is currently controlling the touch layer 101 using the hand; when the current value is large, it is determined that the area of the opposite region between the human body part and the touch layer 101 is large, it is determined that the human body part is the head of a human body and the user may be currently listening to a call or a voice message.

The capacitance value when the human body part and the touch layer 101 form a coupling capacitance is C ═ epsilon × a/d, where epsilon is the relative dielectric constant, a is the area of the region between the human body part and the touch layer 101, d is the distance between the human body part and the touch layer 101, and a or d changes the capacitance C.

When a human body part approaches the display screen 100, the human body part can be regarded as an obstacle of the display screen 100, a distance between the human body part and the display screen 100 is determined through the light receiving module 103 and the second processing unit, the distance can also be used as a distance between the obstacle and the touch layer 101, the third processing unit obtains a current value of the touch layer 101 and a distance between the human body part and the touch layer 101, an area of a relative area between the human body part and the touch layer 101 is determined according to the current value of the touch layer 101 and the distance between the human body part and the touch layer 101, and a type of the human body part is determined according to the area.

In order to accurately determine the type of the human body part, in a possible implementation manner, a preset algorithm is set in the third processing unit, and after the third processing unit obtains the current value of the touch layer 101, the type of the human body part can be determined by using the preset algorithm. The preset algorithm may be any algorithm for identifying the type of the human body part. In the subsequent process, corresponding processing operation can be carried out based on the type of the human body part.

In the display screen provided by this embodiment, the touch layer includes a plurality of capacitive sensing elements for acquiring a current generated by capacitive coupling with a human body part within a sensing range of the display screen, and a fourth transmitting unit for transmitting a fourth signal to the processing module, where the fourth signal carries a current value of the current; the processing module comprises a third processing unit used for determining the type of the human body part according to the received fourth signal. Therefore, the display screen realizes the function of the SAR sensor, the SAR sensor does not need to be additionally arranged, the occupied space is reduced, and the limitation to the size of the display screen is avoided.

Fig. 4 is a schematic structural diagram of an electronic device shown according to an exemplary embodiment, and referring to fig. 4, the electronic device includes the display screen 100 shown in the above-described embodiment, including the entire structure and function of the display screen 100.

The size of the display screen 100 can be set arbitrarily, and the display screen can be applied to electronic devices with smaller screen sizes such as watches, mobile phones, tablet computers and the like, and can also be applied to electronic devices with larger screen sizes such as computers, televisions, air conditioners and the like.

In one possible implementation, the electronic device further includes a processor 110 for controlling various devices in the electronic device.

The processing module 104 in the display screen 100 is connected to the processor 110, and since the display screen 100 implements the functions of the light sensor, the distance sensor and the SAR sensor, at least one of the acquired light intensity, the distance between the display screen 100 and the obstacle and the type of the human body part in the sensing range can be sent to the processor 110, and the processor 110 performs corresponding processing operations.

The electronic device further includes an antenna module 120, and the antenna module 120 emits electromagnetic waves when performing signal transmission, thereby causing electromagnetic radiation. Wherein, the larger the transmitting power of the antenna module 120 is, the higher the radiation value of the antenna module 120 is. However, in order to ensure the safety of the human body part, the radiation value of the antenna module 120 is currently limited, and the limited radiation value is different when different types of human body parts are close to the electronic device. For example, when the head of the user is close to the electronic device, the allowable radiation value is low, and when the hand of the user is close to the electronic device, the allowable radiation value is relatively large.

Therefore, when the display screen 100 determines that the head of the user is close to the electronic device, a notification message indicating that the type of the human body part close to the display screen 100 is the head is sent to the processor 110, and the processor 110 controls the antenna module 120 to reduce the transmission power to reduce the radiation value of the antenna module 120 so that the radiation value of the antenna module 120 can meet the requirement.

In addition, the electronic device further includes a housing 130, the display screen 100 is disposed on a surface of the housing 130, and the antenna module 120 may be disposed on the housing 130 or may be disposed inside the housing 130.

And because the display screen has realized the function of at least one kind of sensor, consequently reduced the space of casing surface that occupies, so both can set up the display screen of bigger size on the casing surface, improve the screen of electronic equipment and account for the ratio.

In the related art, a plurality of sensors may be disposed in the electronic device, the plurality of sensors may be disposed on a surface of a front housing of the electronic device, and occupy more space, and the sensors cannot be omitted, so that the size of the display screen is limited, the screen of the electronic device occupies a smaller area, and a full-screen cannot be realized. It also takes up space inside the housing, resulting in a larger size of the electronic device, which is inconvenient to carry and use. In addition, the sensors may generate electromagnetic interference to other components, such as an antenna module or a camera, and the more the sensors are, the more the electromagnetic interference is serious, and the electromagnetic interference can be avoided only by debugging the electronic device.

In the embodiment of the present disclosure, on the basis of the above-mentioned embodiment, the display screen provided by this embodiment can simultaneously realize the functions of the light sensor, the distance sensor and the SAR sensor, the functions of the display screen are increased, these three sensors are not required to be additionally provided, the occupied space is reduced, the limitation on the size of the display screen is avoided, the space of the electronic device is greatly saved, the screen occupation ratio of the electronic device is improved, the full-screen is realized, the size of the electronic device can be reduced, the carrying and the use are convenient, the electromagnetic interference generated to other components due to the configuration of various sensors is also avoided, and the electronic device is not required to be debugged.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A display screen comprising a touch layer, wherein the display screen further comprises: the liquid crystal display panel comprises a liquid crystal layer, a light receiving module and a processing module, wherein the light receiving module is connected with the processing module;

2. The display screen of claim 1, wherein the processing module further comprises a control unit configured to determine a display brightness according to the light intensity and control the liquid crystal layer to display according to the display brightness, and the control unit is connected to the first processing unit.

3. The display screen of claim 2, wherein the control unit is further configured to determine the display brightness corresponding to the light intensity according to the light intensity and the stored correspondence between the light intensity and the display brightness.

4. The display screen of claim 1,

5. The display screen of claim 1, wherein the touch layer comprises a plurality of capacitive sensing elements for obtaining a current generated by capacitive coupling with a human body part within a sensing range of the display screen and a fourth sending unit for sending a fourth signal to the processing module, wherein the fourth signal carries a current value of the current;

6. A display screen according to any one of claims 1 to 5, wherein the light receiving module is located at a first end of an inside surface of the liquid crystal layer.

7. The display screen of claim 6, wherein the first end is an upper end of the display screen.

8. An electronic device, characterized in that it comprises a display screen according to any one of claims 1-7.

9. A display screen comprising a touch layer, wherein the display screen further comprises: the liquid crystal display panel comprises a liquid crystal layer, a light receiving module and a processing module, wherein the light receiving module is connected with the processing module;

10. An electronic device characterized in that it comprises a display screen according to claim 9.