Display screen assembly, electronic device, and method for detecting distance between display area and detection objection

A display screen assembly is provided. The display screen assembly includes a display screen, a first light source, a light conducting member, a receiving element, and a processor. The display screen includes a display region for displaying images and a non-display region surrounding the display region. The light conducting member faces the display region. At least one first light source faces at least one surface of the light conducting member. The at least one first light source is configured to emit a detection signal to the light conducting member. The light conducting member is configured to diffuse the detection signal to allow the detection signal to pass through the display region, to interact with a detection object to form a target signal. The receiving element is disposed in the display region and configured to receive the target signal.

TECHNICAL FIELD

The present disclosure relates to the field of electronic technology, and particularly to a display screen assembly, an electronic device, and a method for controlling the electronic device.

BACKGROUND

Generally, users interact with electronic elements in an electronic device via a display screen, and the electronic elements occupy a non-display region of the display screen, which is not beneficial to achieving the full screen of the electronic device. Therefore, with increasing demand for a screen-to-body ratio of an electronic device, how to reduce an area of the non-display region of the display screen occupied by the electronic elements to increase the screen-to-body ratio of the electronic device has become a problem to be solved

SUMMARY

The present disclosure provides a display screen assembly, an electronic device, and a method for controlling the electronic device, so as to increase a screen-to-body ratio.

In an aspect, there is provided a display screen assembly. The display screen assembly includes a display screen, a light conducting member, at least one first light source, a receiving element, and a processor. The display screen includes a display region for displaying images and a non-display region surrounding the display region. The light conducting member faces the display region. The at least one first light source faces at least one surface of the light conducting member. The at least one first light source is configured to emit a detection signal to the light conducting member. The light conducting member is configured to diffuse the detection signal to allow the detection signal to pass through the display region, to interact with a detection object to form a target signal. The processor is electrically coupled with the at least one first light source and the receiving element. The processor is configured to detect a distance between the display region and the detection object according to one of an intensity of the target signal and a difference between a transmission time of the detection signal and a reception time of the target signal.

In another aspect, there is provided an electronic device. The electronic device includes the above-mentioned display screen assembly.

In an aspect, there is provided a method for controlling an electronic device. The method includes the following. A processor controls at least one first light source to emit a detection signal, the detection signal is capable of interacting with a detection object to form a target signal. The processor controls the receiving element to receive the target signal. The processor detects a distance between a display region and the detection object according to one of an intensity of the target signal and a difference between a transmission time of the detection signal and a reception time of the target signal.

DETAILED DESCRIPTION

Technical solutions in implementations of the present disclosure will be described clearly and completely hereinafter with reference to the accompanying drawings.

The disclosure relates to a display screen assembly. The display screen assembly includes a display screen, a light conducting member, at least one first light source, multiple second light sources, a receiving element, and a processor. The display screen includes a display region for displaying images and a non-display region surrounding the display region. The light conducting member faces the display region. The at least one first light source faces at least one surface of the light conducting member. The at least one first light source is configured to emit a detection signal to the light conducting member. The light conducting member is configured to diffuse the detection signal to allow the detection signal to pass through the display region, to interact with a detection object to form a target signal. The multiple second light sources are configured to provide backlight for the display screen assembly. The receiving element is disposed in the display region and configured to receive the target signal. The processor is electrically coupled with the at least one first light source and the receiving element. The processor is configured to detect a distance between the display region and the detection object according to one of an intensity of the target signal and a difference between a transmission time of the detection signal and a reception time of the target signal.

In at least one implementation, the display screen assembly further includes a first flexible circuit board. The first flexible circuit board faces at least one surface of the light conducting member. The at least one first light source and the multiple second light sources are spaced apart on the first flexible circuit board and electrically coupled with the first flexible circuit board.

In at least one implementation, the light conducting member includes a first surface and a second surface opposite to the first surface. The first surface faces the display region, and the second surface faces the first flexible circuit board. The at least one first light source and the multiple second light sources are located on a side of the first flexible circuit board close to the light conducting member.

In at least one implementation, the display region includes multiple pixel regions arranged in an array. Each of the multiple pixel regions has a light transparent portion and a black matrix surrounding the light transparent portion. Each of the at least one first light source faces the light transparent portion.

In at least one implementation, an orthographic projection of the light transparent portion of each of the multiple pixel regions on the first flexible circuit board covers a corresponding one of the at least one first light source.

In at least one implementation, the receiving element includes multiple receiving elements. Each of the multiple receiving elements is disposed in the light transparent portion of a corresponding one of the multiple pixel regions. An orthographic projection of each of the multiple receiving elements on the first flexible circuit board is spaced apart from a corresponding one of the at least one first light source.

In at least one implementation, each of the at least one first light source is a mini LED or a micro LED for emitting infrared lights. Each of the multiple second light sources is a mini LED or a micro LED for emitting visible lights. The light conducting member includes a diffusion film and a brightness enhancement film stacked with the diffusion film. The diffusion film is configured to change a transmission angle of optical signals which are transmitted into the diffusion film.

In at least one implementation, the light conducting member includes a first surface, a second surface opposite to the first surface, and a side surface connected between the first surface and the second surface. The first surface faces the display region, the side surface facing the first flexible circuit board. The at least one first light source and the multiple second light sources are located on a side of the first flexible circuit board close to the light conducting member.

In at least one implementation, the light conducting member is a light guide plate. The side surface defines multiple grooves. Each of the at least one first light source is located in a corresponding one of the multiple grooves. Each of the multiple grooves has an arc inner wall.

In at least one implementation, the display screen assembly further includes a second flexible circuit board and a third flexible circuit board. The second flexible circuit board faces at least one surface of the light conducting member. The at least one first light source includes multiple first light sources, which are located on the second flexible circuit board and electrically coupled with the second flexible circuit board. The third flexible circuit board is located to a side of the second flexible circuit board away from the light conducting member. The multiple the second light sources are located on the third flexible circuit board and electrically coupled with the third flexible circuit board. Each of the multiple the second light sources faces a gap between corresponding adjacent two of the multiple first light sources.

In at least one implementation, the second flexible circuit board is made of a light transparent material. Light emitted by each of the multiple second light sources is capable of reaching the outside of the display screen after passing through the second flexible circuit board and the light conducting member in sequence.

In at least one implementation, the display screen assembly further includes a filter cover. The filter cover is disposed on the multiple second light sources and configured to filter out the detection signal in signals emitted by the multiple second light sources.

In at least one implementation, the display screen assembly further includes a first control circuit and a second control circuit. The first control circuit is electrically coupled with the at least one first light source and the receiving element and is configured to control the at least one first light source to emit the detection signal and to control the receiving element to receive the target signal. The second control circuit is electrically coupled with the multiple second light sources and is configured to control the multiple second light sources to turn on or turn off the display screen.

In at least one implementation, the at least one first light source is configured to transmit a first electrical signal to the processor upon transmission of the detection signal. The processor is configured to receive the first electrical signal and obtain a first time point at which the first electrical signal is received. The receiving element is configured to transmit a second electrical signal to the processor upon reception of the target signal. The processor is configured to receive the second electrical signal and obtain a second time point at which the second electrical signal is received. The processor is configured to obtain a distance between the detection object and the display region according to a difference between the first time point and the second time point, to control the second control circuit to turn on or turn off the multiple second light sources.

In at least one implementation, the receiving element is configured to transmit a third electrical signal to the processor upon reception of the target signal. The third electrical signal has an intensity corresponding to that of the target signal. The processor is configured to obtain a distance between the detection object and the display region according to the intensity of the third electrical signal received, to control the second control circuit to turn on or turn off the multiple second light sources.

In at least one implementation, the display screen assembly further includes a switching element. The switching element is electrically coupled with the processor and the receiving element. The processor is configured to turn off the switching element to power off the receiving element, upon transmission of the detection signal by the at least one first light source. The processor is configured to turn on the switching element to control the receiving element to receive the target signal, upon completion of the transmission of the detection signal by the at least one first light source.

In at least one implementation, the display screen assembly further includes a light-shielding member. The light-shielding member is located between the receiving element and the at least one first light source and faces the receiving element. The light shielding member is configured to prevent the detection signal emitted by the at least one first light source from being directly transmitted toward the receiving element.

In at least one implementation, the display region includes multiple pixel regions and multiple thin film transistors. Each of the multiple thin film transistors is located in a corresponding one of the multiple pixel regions. Each of multiple receiving elements is located in a corresponding one of the multiple pixel regions. The receiving element is adjacent to or diagonally opposite to the thin film transistor that is in the same pixel region as the receiving element.

The disclosure further relates to an electronic device. The electronic device includes a housing and a display screen assembly covered on the housing. The display screen assembly includes a display screen, a light conducting member, at least one first light source, multiple second light sources, a receiving element, and a processor. The display screen includes a display region for displaying images and a non-display region surrounding the display region. The light conducting member faces the display region. The at least one first light source faces at least one surface of the light conducting member. The at least one first light source is configured to emit a detection signal to the light conducting member. The light conducting member is configured to diffuse the detection signal to allow the detection signal to pass through the display region, to interact with a detection object to form a target signal. The multiple second light sources are configured to provide backlight for the display screen assembly. The receiving element is disposed in the display region and configured to receive the target signal. The processor is electrically coupled with the at least one first light source and the receiving element. The processor is configured to detect a distance between the display region and the detection object according to one of an intensity of the target signal and a difference between a transmission time of the detection signal and a reception time of the target signal.

The disclosure further relates to a method for controlling an electronic device. The method includes the following. Control at least one first light source of the electronic device to emit a detection signal, the detection signal is capable of interacting with a detection object to form a target signal. Control a receiving element of the electronic device to receive the target signal. Detect a distance between a display region of the electronic device and the detection object according to one of an intensity of the target signal and a difference between a transmission time of the detection signal and a reception time of the target signal.

Referring toFIG. 1andFIG. 2, an electronic device100is provided. The electronic device100includes a display screen assembly10, a housing20, and an electronic component30. The display screen assembly10is covered on the housing20. The electronic component30is received in a space surrounded by the display screen assembly10and the housing20. The electronic device100may be an electronic product with display function, such as a mobile phone, a laptop, a palmtop computer, an e-reader, a television, a smart appliance, a smart screen, a smart home, a wearable electronic device, and an on-board display.

FIG. 3illustrates the display screen assembly10according to the present disclosure. The display screen assembly10includes a display screen1, at least one first light source2, a receiving element3, a processor4, a light conducting member5, and multiple second light sources6. Referring toFIG. 3andFIG. 4, the light conducting member5faces a display region1a. The at least one first light source2directly faces at least one surface of the light conducting member5. The at least one first light source2is configured to emit a detection signal a to the light conducting member5. The light conducting member5is configured to transfer or propagate the detection signal a. The light conducting member5is configured to diffuse the detection signal a, so as to allow the detection signal a to pass through the display region1ato exit from the display region1a, and then to interact with a detection object M to form a target signal b. The detection object M faces a light-emitting surface1cof the display screen1. The receiving element3is disposed in the display region1aand configured to receive the target signal b. The second light source6is configured to provide backlight for the display screen assembly10.

The processor4is electrically coupled with the first light source2and the receiving element3. The processor4is configured to detect a distance L between the display region1aand the detection object M according to an intensity of the target signal b and a difference between a transmission time of the detection signal a and a reception time of the target signal b.

In an implementation, the display screen1has the display region1aand a non-display region1bsurrounding the display region1a. The display region1ais configured to display images. The display screen1includes the display region1aand the non-display region1bsurrounding the display region1a. Electronic components with light-emitting and display functions are disposed in the display region1a, allowing the display region1ato display images. Electrical connecting wires are disposed in the non-display region1b. The electrical connecting wires are configured to control and drive the electronic components which have light-emitting and display functions.

It is noted that, in implementations of the present disclosure, the light conducting member5may refer to an optical assembly for propagating lights.

In an implementation, the light conducting member5can cover the at least one first light source2(seeFIG. 3). Alternatively, the first light source2can directly face a side surface of the light conducting member5(seeFIG. 4).

It is noted that, in an implementation, multiple first light sources2and multiple second light sources6are provided, where some of the multiple first light sources and the multiple second light sources6directly face a side surface of the light conducting member5and the rest of the multiple first light sources and the multiple second light sources6directly face a bottom surface of the light conducting member5(that is, a surface of the light conducting member5parallel to the display region1a). In this way, the display screen1may has a high brightness and a compact structure.

The first light source2and the receiving element3are disposed in the display screen assembly10, the first light source2and the receiving element3cooperate to detect the distance L between the display screen1and the detection object M, such that the electronic device100can perform operations such as turning screen off, turning screen on, and unlocking screen. The receiving element3is disposed in the display region1a, the receiving element3does not occupy the non-display region1band does not affect the display region1a, such that the area of the non-display region1bcan be further reduced, thereby increasing a screen-to-body ratio of the display screen assembly10. The first light source2is disposed in the non-display region1b, the light conducting member5is configured to propagate the detection signal a emitted by the first light source2to the display region1a, to increase a radiation area of the detection signal a and improve distance detection efficiency.

The display screen1can be covered with a transparent cover plate as a protective layer. The first light source2is disposed in the non-display region1band the receiving element3is disposed in the display region1a, and there is a distance between the first light source2and the receiving element3, so as to prevent the detection signal which is emitted by the first light source2from being reflected by the transparent cover plate and received by the receiving element3, to avoid interference with the target signal b received by the receiving element3and reduce detection accuracy of the electronic device100.

It is noted that an area of the light conducting member5may be greater than or equal to that of the display region1a, such that light emitted from the light conducting member5can illuminate the entire display region1a.

In an implementation, each of the first light source2and the second light source6can be a mini LED, a micro LED, or the like. Each of the first light source2and the second light source6has a size of 1˜500 um. The first light source2and the second light source6can be packaged on a flexible circuit board. The first light source2and the second light source6can be a mini LED or a micro LED, which is possible to reduce a size of each light source itself and a distance between light sources, such that more light sources can be arranged and brightness and uniformity of all light sources (that is, the first light source2and the second light source6) can be improved.

In an implementation, the light conducting member5is configured to diffuse uniformly the light emitted from the first light source2and the second light source6to propagate the light to the outside. The light conducting member5can be made of a transparent material to allow the detection signal a emitted by the first light source2and a light signal emitted by the second light source6to pass through.

It is noted that, the processor4is electrically coupled with the first light source2and the receiving element3. The processor4may be located in the non-display region1b. Alternatively, the processor4may be located in the display region1awithout affecting displaying.

In this implementation, the first light source2and the receiving element3can be used for distance detection, blood oxygen detection, heart rate detection, body temperature detection, remote control, gesture recognition, face recognition, and the like. For example, in an implementation, the detection signal a emitted by the first light source2is reflected by a surface of the detection object M in front of the display region1aand then received by the receiving element3, such that the processor4can obtain the distance L between the display region1aand the detection object M. In an implementation, the detection signal a emitted by the first light source2is projected to and reflected by a surface of the blood vessel, and then is received by the receiving element3, such that the processor4can obtain blood oxygen information and heart rate information. In an implementation, the detection signal a emitted by the first light source2is projected to and reflected by a skin surface, and then is received by the receiving element3, such that the processor4can obtain body temperature information. In an implementation, the detection signal a emitted by the first light source2is projected to and received by an electronic component, such that the processor4can control the electronic component. In an implementation, the detection signal a emitted by the first light source2is projected to and reflected by the hand and then is received by the receiving element3, such that the processor4can obtain change information of the hand, thereby realizing gesture recognition. In an implementation, the detection signal a emitted by the first light source2is projected to and reflected by the face and then is received by the receiving element3, such that the processor4can obtain face information and compare it with preset information, thereby realizing face recognition.

In an implementation, the first light source2may be an infrared light-emitting diode or an infrared light-emitting triode. The receiving element3may be an infrared light-receiving diode or an infrared light-receiving triode. The detection signal a may be infrared light. As an example, the detection signal may have a wavelength of 960 nm. In other implementations, the detection signal a may also be near-infrared light.

In other implementations, the first light source2may also be an ultraviolet light-emitting diode or an ultraviolet light-emitting triode. The receiving element3may be an ultraviolet light-receiving diode or an ultraviolet light-receiving triode. The detection signal is ultraviolet light or near ultraviolet light.

In an implementation, the detection signal a may also be any combination of infrared light, near-infrared light, ultraviolet light, and near-ultraviolet light.

In an implementation, the second light source6may be an LED, and the second light source6is configured to emit visible lights.

In an implementation, referring toFIG. 5, the at least one first light source2and the multiple second light sources6may be arranged around the display region1a. N second light sources6are located between two adjacent first light sources2, N can be an integer greater than or equal to one.

In an implementation, referring toFIG. 6, the multiple second light sources6may also be tiled in rows and columns in an array. The at least one first light source2may be located in gaps defined in the array. Alternatively, the at least one first light source2may also be arranged to replace some second light sources6in the array.

In an implementation, referring toFIG. 6, the first light source2may directly face the entire display region1a. Alternatively, referring toFIG. 7, the at least one first light source2may be located directly facing the center of the display region1a. Alternatively, referring toFIG. 8, the at least one first light source2may be located directly facing a part of the display region1awhich is adjacent to the non-display region1b. That is, the at least one first light source2is located at an edge of the display region1a, and alternatively, the at least one first light source2may be located directly facing corners of the display region1a.

In some implementations, referring toFIG. 3andFIG. 4, the display screen assembly10further includes a first flexible circuit board21. The first flexible circuit board21faces at least one surface of the light conducting member5. The at least one first light source2and the multiple second light sources6are spaced apart on the first flexible circuit board21and electrically coupled with the first flexible circuit board21. That is, in the at least one first light source2and the multiple second light sources6, any adjacent two light sources are spaced apart from each other. The at least one first light source2and the multiple second light sources6are located between the first flexible circuit board21and the light conducting member5, to allow the detection signal a emitted by the first light source2to enter the light conducting member5. In implementations, the at least one first light source2and the multiple second light sources6are located on a side of the first flexible circuit board21close to the light conducting member5. The light conducting member5is configured to diffuse the detection signal a, to allow the detection signal a to pass through the entire display region1ato the outside, thereby increasing a radiation area of the detection signal a, and increasing the detection efficiency of the electronic device100.

In an implementation, referring toFIG. 3, the first flexible circuit board21may face a side of the light conducting member5away from the display screen1. Alternatively, referring toFIG. 4, the first flexible circuit board21may face a side surface of the light conducting member5.

The first light source2and the second light source6are electrically with the same flexible circuit board, such that less flexible circuit boards are required, and the electronic device100has a more rational layout. At the same time, the flexible circuit board also plays a role of carrying the first light source2and the second light source6.

It is noted that the first flexible circuit board21may be carried on a supporting board to allow the first flexible circuit board21to have a sufficient structural strength, so as to support the first light source2and the second light source6.

In an implementation, referring toFIG. 9, the light conducting member5includes a first surface51, a second surface52opposite to the first surface51, and a side surface53connected between the first surface51and the second surface52. The first surface51faces the display region1a. The first flexible circuit board21faces the second surface52of the light conducting member5. The at least one first light source2and the multiple second light sources6are located between the first flexible circuit board21and the second surface52of the light conducting member5. In implementations, the at least one first light source and the multiple second light sources are located on the side of the first flexible circuit board21close to the light conducting member5.

It is noted that, the first surface51acts as a light-incident surface, and the second surface52acts as a light-emitting surface. The first light source2and the second light source6face the display region1a.

In an implementation, referring toFIG. 3, the first light source2is a mini LED or micro LED for emitting infrared lights. The second light source6is a mini LED or micro LED for emitting visible lights. The light conducting member5may include a diffusion film501and a brightness enhancement film502stacked with the diffusion film501. The diffusion film501is located between the brightness enhancement film502and the at least one first light source2as well as the multiple second light sources6. The diffusion film501is configured to change a transmission angle of optical signals, such that the optical signals are uniformly distributed when transmitted in the diffusion film501. The brightness enhancement film502is configured to converge light signals from various directions to a direction perpendicular to the display screen1for propagation. In an implementation, the brightness enhancement film502may include an upper brightness enhancement film and a lower brightness enhancement film stacked with the upper brightness enhancement film.

Each of the first light source2and the second light source6is a mini LED or micro LED, more first light sources2and more second light sources6can be disposed on the flexible circuit board due to a relatively small size of the first light source2and the second light source6. In this way, the at least one first light source2and the multiple second light sources6are densely distributed, lights emitted by the at least one first light source2and the multiple second light sources6have a strong brightness and uniform distribution, as such, there is no need to provide a light guide plate for guiding the lights emitted by the at least one first light source2and the multiple second light sources6and a reflector for reflecting the lights emitted by at least one first light source2and the multiple second light sources6, thereby reducing a thickness of the display screen assembly10.

In other implementations, the light conducting member5can also include a light guide plate. The light guide plate may be arranged between the at least one first light source2and the diffusion film501. The light guide plate is used to increase uniformity of the light signals. The light guide plate may be made of optical grade polycarbonate, optical grade polymethyl methacrylate, and the like.

The second light source6can act as a backlight source of the display screen1. The first light source2is disposed between the second light sources6which act as the backlight sources, and there is no need to provide an additional position for the first light source2, so as to save space within the electronic device100. In addition, the first light source2and the second light source6can share the flexible circuit board, a driving circuit, and the like, reducing the number of components in the electronic device100, simplifying design of the electronic device100, and improving detection performance of the electronic device100.

In an implementation, referring toFIG. 10, the display region1aincludes multiple pixel regions13arranged in an array. Each pixel region13has a light transparent portion131and a black matrix132. The black matrix132surrounds the light transparent portion131. The at least one first light source2faces the light transparent portion131to allow the detection signal a to reach the outside of the display screen1after passing through the light transparent portion131.

The first light source2directly faces the light transparent portion131, such that the detection signal a emitted by the first light source2can directly pass through the light conducting member5and the light transparent portion131and then reach the outside of the display region1a. Thus, blocking of the detection signal a by the black matrix132is reduced, so that more detection signals a can reach the outside of the display region1amore quickly, thereby improving the detection efficiency of the electronic device100.

Further, referring toFIG. 10, an orthographic projection of one pixel region13on the first flexible circuit board21covers a corresponding one of the at least one first light source2. In other words, the first light source2may have a size smaller than the pixel region13facing the first light source2. Further, the first light source2may have a size smaller than or equal to that of the light transparent portion131of the pixel region13facing the first light source2. In this way, the detection signal a emitted by the first light source2can reach the outside after passing through the light transparent portion131corresponding to the first light source2, and blocking in the detection signal a can be reduced.

In an implementation, referring toFIG. 10, the receiving element3is embodied as multiple receiving elements. Each of the multiple receiving elements3is disposed in the light transparent portion131of a corresponding one of the multiple pixel regions13. An orthographic projection of each of the multiple receiving elements3on the first flexible circuit board21is spaced apart from a corresponding one of the at least one first light source2(that is, the orthographic projection of each of the multiple receiving elements3on the first flexible circuit board21does not overlap with the corresponding one of the at least one first light source2), so as to reduce shielding of the detection signal a emitted from the first light source2caused by the receiving element3.

In an implementation, referring toFIG. 4,FIG. 11, andFIG. 12, the light conducting member5includes a first surface51, a second surface52opposite to the first surface51, and a side surface53connected between the first surface51and the second surface52. The first surface51directly faces the display region1a. The side surface53of the light conducting member5directly faces the first flexible circuit board21. The at least one first light source2and the multiple second light sources6are located between the first flexible circuit board21and the side surface53of the light conducting member5. In implementations, the at least one first light source2and the multiple second light sources6are located on a side of the first flexible circuit board21close to the light conducting member5. In other words, the first light source2and the second light source6are located close to the side surface53of the light conducting member5, such that the thickness of the display screen assembly10can be reduced.

In an implementation, referring toFIG. 4, the light conducting member5may include the diffusion film501, the brightness enhancement film502, and a light guide plate503stacked in sequence. The light guide plate503is disposed on a side of the diffusion film501away from the display screen1. The first light source2faces a side of the light guide plate503. The light guide plate503is used to increase the uniformity of the optical signals. The light guide plate503may be made of optical grade polycarbonate, optical grade polymethyl methacrylate, and the like. The diffusion film501is located between the light guide plate503and the brightness enhancement film502. The diffusion film501is located between the brightness enhancement film502and the first light source2. The diffusion film501is configured to change the transmission angle of the optical signals, such that the optical signals are uniformly distributed when transmitted in the diffusion film501. The brightness enhancement film502is configured to converge the light signals from various directions to a direction perpendicular to the display screen1for propagation. In an implementation, the brightness enhancement film502may include an upper brightness enhancement film and a lower brightness enhancement film stacked with the upper brightness enhancement film.

Further, referring toFIG. 12, the side surface53defines multiple grooves54. Each of the multiple grooves54corresponds to a corresponding one of the at least one first light source2. Each first light source2is located in a corresponding groove54. An inner wall of the groove54half-surrounds the first light source2, such that the detection signal a emitted from the first light source2is incident into the light conducting member5as much as possible, thereby reducing loss of the detection signal a. Further, the inner wall of the groove54is in an arc shape. The inner wall of the groove54can diffuse the detection signals a into the light conducting member5, such that the detection signals a exit from substantially the entire light-emitting surface of the light conducting member5, thereby increasing a light-emitting area for the detection signals a.

The second light source6is located outside the groove54. In other words, the first light source2can be interleaved with the second light source6, which can reduce an interference between the detection signal a emitted from the first light source2and the optical signal emitted from the second light source6.

In an implementation, referring toFIG. 13, the display screen assembly10includes a second flexible circuit board22and a third flexible circuit board34. The second flexible circuit board22faces at least one surface of the light conducting member5. The at least one first light source2is embodied as multiple first light sources2, which are located on the second flexible circuit board22and electrically connected with the second flexible circuit board22. The third flexible circuit board34is located at a side of the second flexible circuit board22away from the light conducting member5. The multiple second light sources6are located on the third flexible circuit board34and electrically coupled with the third flexible circuit board34. Each of the multiple second light sources6faces a gap between corresponding adjacent two of the multiple first light sources2. In other words, the light conducting member5, the second flexible circuit board22, and the third flexible circuit board34are stacked at intervals. The first light source2is located between the light conducting member5and the second flexible circuit board22. The second light source6is located between the second flexible circuit board22and the third flexible circuit board34. In implementations, the first light source2is located on a side of the second flexible circuit board22close to the light conducting member5, and the second light source6is located on a side of the third flexible circuit board34close to the second flexible circuit board22. In this way, more first light sources2can be disposed on the second flexible circuit board22, and more second light sources6can be disposed on the third flexible circuit board34, compared with the arrangement where the first light sources2and the second light sources6are disposed on the same flexible circuit board and spacing between light sources are required, the number of the first light sources2and the number of the second light sources6will not be restricted. Furthermore, the first light sources2are uniformly disposed on the second flexible circuit board22and the second light sources6are uniformly disposed on the third flexible circuit board34without interference between the first light sources2and the second light sources6.

In an implementation, the second flexible circuit board22may be made of a light transparent material. Light emitted by the second light source6can reach the outside of the display screen1after passing through the second flexible circuit board22and the light conducting member5in sequence.

In an implementation, the second flexible circuit board22may contain a brightener to increase a brightness of the light signal that is emitted by the second light source6, such that the brightness enhancement film can be omitted and space is saved.

In an implementation, referring toFIG. 14, the display screen assembly10further includes a filter cover81. The filter cover81is disposed on the second light source6. The filter cover81is used to block a detection signal a included in signals emitted by the second light source6, such that no detection signal a is included in the signals emitted by the second light source6and interference with a detection result of the receiving element3can be avoided.

In an implementation, referring toFIG. 15, the display screen assembly10further includes a light-shielding member82. The light-shielding member82is located between the receiving element3and the first light source2. The light-shielding members82is embodied as multiple light-shielding members82. Each of the multiple light-shielding members82faces a corresponding one of the multiple receiving elements3. The light-shielding member82is configured to prevent the detection signal a emitted by the first light source2from being directly transmitted toward the receiving element3. An orthographic projection of the light-shielding member82on the display region1acan cover the receiving element3.

Referring toFIG. 16, the display screen assembly10further includes a first control circuit41and a second control circuit42. The first control circuit41is electrically coupled with the multiple first light sources2and the receiving element3. The processor4is electrically coupled with the first control circuit41and the second control circuit42. The first control circuit41is configured to control the multiple first light sources2to transmit detection signals a and to control the receiving element3to receive the target signal b. The second control circuit42is electrically coupled with the multiple second light sources6and is configured to control the multiple second light sources6to light up or light off the display screen1.

It is noted that, the first control circuit41is independent of the second control circuit42. In other words, the first control circuit41can individually control to light up the first light source2(that is, control the first light source2to transmit the detection signal a), and the second control circuit42can individually control to light up the second light source6without interfering with the first light source2. In an implementation, fingerprint recognition is independent from displaying of the display screen assembly10. In the present disclosure, the first control circuit41controls the first light source2and the second control circuit42controls the second light source6, as such, the first light source2can emit the detection signal independently in fingerprint identification, the second light source6can emit the second light signal b independently in displaying, and in displaying and fingerprint identification, the first light source2can emit the light signal for fingerprint recognition while the second light source6emits the light signal for displaying at the same time. In this way, different light signals are emitted for different scenarios such as displaying and fingerprint identification, and the functionality, flexibility, and stability of the electronic device100can be improved.

In other implementations, the first control circuit41and the second control circuit42can be multiplexed. In other words, the first control circuit41can control the first light source2to be lighted up or turned on and the second light source6; alternatively, the second control circuit42can control the first light source2and the second light source6to be lighted up or turned on, and less control circuits are required.

In an implementation, referring toFIG. 3andFIG. 4, the first light source2is configured to transmit a first electrical signal to the processor4upon transmission of the detection signal a. The processor4is configured to receive the first electrical signal and obtain first time point t1at which the first electrical signal is received. The receiving element3is configured to transmit a second electrical signal to the processor4upon reception of the target signal b. The processor4is configured to receive the second electrical signal and obtain second time point t2at which the second electrical signal is received. The processor4is configured to determine a distance between the detection object M and the display region1aaccording to a difference between first time point t1and second time point t2and a wavelength of the detection signal a.

When the processor4detects that the distance L between the detection object M and the display region1ais less than a preset value, the processor4controls the second light source6to turn off. When the processor4detects that the distance L between the detection object M and the display region1ais greater than or equal to the preset value, the processor4controls the second light source6to turn on.

In an implementation, when the display region1ais in a screen-on state (that is, the second light source6is on) and the distance L between the detection object M and the display region1ais less than the preset value, the processor4controls the second light source6to turn off. The preset value may range from 3 cm to 5 cm for example. When the distance L between the detection object M and the display region1ais less than the preset value, it indicates that the detection object M is close to the display region1a, and the processor4may control the second light source6to turn off to reduce power loss and avoid misoperation. The above operations can be carried out in circumstances such as when a user answers a call without turning off the display region1a, when the user puts the electronic device100in his pocket without turning off the display region1a, etc. When the display region1ais in an off-screen state (that is, the second light source6is off) and the distance L between the detection object M and the display region1ais greater than the preset value, the processor4controls the second light source6to light up. As an option, the preset value can be 10 cm. When the distance L between the detection object M and the display region1ais greater than the preset value, it indicates that the detection object M is away from the display region1a, and the processor4can light up the second light source6to provide the user with a display environment, so as to facilitate the user to perform subsequent operations on the electronic device100. The above operations can be carried out in a circumstance that the display region1ais off while the user answers a call, etc.

It is noted that, the distance L between the detection object M and the display region1ain the present disclosure refers to a distance between an outer surface of the detection object M and the light-emitting surface1cof the display region1awhen the outer surface of the detection object M faces the display region1a. The detection object M can be the human face, the human ear, or the like.

When the user is making a call, the controller7controls each of the multiple first light sources2to transmit the detection signal a and the first electrical signal. The first electrical signal is transmitted to the processor4. The processor4receives the first electrical signal at first time point t1. The detection signal a can be 960 mn infrared light. The detection signal a exits from of the display region1aand reaches the user's face or the user's ear to form the target signal b. The target signal b is reflected to the receiving element3. When receiving the target signal b, the receiving element3generates the second electrical signal and transmits the second electrical signal to the processor4. The processor4receives the second electrical signal at second time point t2. The processor4calculates the distance L between the user's face or the user's ear and the display region1aaccording to (t2−t1) and the wavelength of the detection signal a. When the distance L between the user's face or ear and the display region1ais greater than or equal to 10 cm, the processor4controls the second light source6to turn off. When the distance L between the user's face or ear and the display region1ais less than 10 cm, the processor4controls the second light source6to light up.

Different from the previous implementation, in an implementation, the receiving element3transmits a third electrical signal to the processor4when receiving the target signal b, and the third electrical signal has an intensity corresponding to that of the target signal b. In this implementation, a greater intensity of the target signal b indicates a smaller loss of the target signal b during a transmission process and a third electrical signal with a greater intensity. The processor4can determine the distance L between the detection object M and the display region1aaccording to the intensity of the third electrical signal received, and control the second light source6to turn on or turn off. In this implementation, the intensity of the target signal b decreases as the distance L between the detection object M and the display region1aincreases, and the intensity of the second electrical signal decreases as the intensity of the target signal b decreases.

When the processor4detects that the second light source6is off and the intensity of the second electrical signal is less than or equal to the preset value of the electrical signal, the distance L between the detection object M and the display region1ais greater than or equal to the preset value, and the processor4may control the second light source6to light up. When the processor4detects that the second light source6is on and the intensity of the second electrical signal is greater than the preset value of the electrical signal, the distance L between the detection object M and the display region1ais less than the preset value, and the processor4may control the second light source6to turn off.

Different from the above implementation, in an implementation, the processor4may control the second light source6to turn on or turn off according to change in the distance between the detection object M and the display region1a. The processor4may control the second light source6to light up if the distance L between the detection object M and the display region1ais gradually increased. The processor4may control the second light source6to turn off if the distance L between the detection object M and the display region1ais gradually decreased.

In an implementation, referring toFIG. 17, the display screen assembly10further includes a switching element9. The switching element9is electrically coupled with the processor4and the receiving element3. When the first light source2emits the detection signal a, the processor4controls the switching element9to turn off to power off the receiving element3. When the first light source2completes transmission of the detection signal a, the processor4turns on the switching element9to control the receiving element3to receive the target signal b.

In an implementation, the switching element9may be located in the display region1aor the non-display region1b. The switching element9may be a thin film transistor, or the like.

In an implementation, in order to prevent the detection signal a emitted by the first light source2from being directly received by the receiving element3without being reflected by the detection object M, the receiving element3is controlled to be powered off when transmitting the detection signal a, such that the receiving element3is unable to receive the detection signal a. When the receiving element3completes the transmission of the detection signal a, the receiving element3is powered on to receive the target signal b reflected by the detection object M, so as to reduce interference with the target signal b received by the receiving element3and avoid a reduction in detection efficiency.

Referring toFIG. 18, the display region1aincludes a thin film transistor array substrate12. The receiving element3is located in the thin film transistor array substrate12.

In an implementation, referring toFIG. 18, the thin film transistor array substrate12includes multiple pixel regions13arranged in an array and multiple thin film transistors14. Each thin film transistor14is located in a corresponding one pixel region13. The receiving element3is embodied as multiple receiving elements3. Each receiving element3is located in a corresponding one pixel region13. The receiving element3is adjacent to or diagonally opposite to the thin film transistor14that is in the same pixel region13as the receiving element3.

In an implementation, the pixel region13is rectangular. The thin film transistor14and the receiving element3can be diagonally distributed in the pixel region13. In other implementations, the thin film transistor14and the receiving element3may be located at two adjacent corners of the pixel region13.

The receiving element3and the thin film transistor14may be located on the same layer. The receiving element3may be spaced apart from the thin film transistor14.

Since the receiving element3and the thin film transistor14are arranged in the same layer and the receiving element3is disposed in a gap between the thin film transistors14, the receiving element3and the thin film transistor14do not have to be stacked in a direction perpendicular to the display screen1, thereby reducing the thickness of the display screen assembly10. Moreover, an electrical connection wire between the receiving element3and the first light source2can be provided in the same manufacturing process as a data line111, a scan line112, or an electrode layer of the thin film transistor14, thereby simplifying the manufacturing process.

It is noted that the multiple receiving elements3can be distributed across the entire display region1a. Alternatively, the multiple receiving elements3can also be distributed in a part of the display region1a.

In this implementation, the display screen1can be an OLED display screen, a LCD display screen, or other display screens equipped with the thin film transistor array substrate12.

In other implementations, the receiving elements3can be arranged in at least one of an anode layer, a light-emitting layer, and a cathode layer of the OLED display screen. The receiving elements3can be arranged in at least one of a liquid crystal layer and a color filter layer of the LCD display screen.

In an implementation, referring toFIG. 19, the receiving element3includes a photosensitive layer31. The photosensitive layer31has a resistance varied with the intensity of the target signal b received. In other words, the receiving element3can be trigged, by a variation in the resistance of the photosensitive layer31, to transmit the second electrical signal to the processor4. The processor4detects the distance L between the detection object M and the display region1aaccording to a difference between a transmission time of the first electrical signal and a reception time of the second electrical signal. Alternatively, the processor4can detect the intensity of the target signal b received by the photosensitive layer31according to a resistance value of the photosensitive layer31. The processor4can detect the distance L between the detection object M and the display region1aby detecting the intensity of the target signal b received by the photosensitive layer31. In an implementation, the photosensitive layer31may include photosensitive materials such as lead sulfide (PbS), indium tin zinc oxide (ITZO), or indium gallium zinc oxide (IGZO).

Referring toFIG. 19, the thin film transistor14has a gate layer71, an insulating layer72, and a source-drain layer73stacked in sequence. The photosensitive layer31may be located in the same layer as at least one of the gate layer71, the insulating layer72, and the source-drain layer73.

For example, referring toFIG. 19, the gate layer71is disposed on a substrate70. The photosensitive layer31may be disposed on the substrate70and spaced apart from the gate layer71. The insulating layer72covers the gate layer71and the photosensitive layer31. The source-drain layer73is disposed on the insulating layer72. The insulating layer72can be made of light transparent material to reduce the loss of optical signals in the insulating layer72, such that more light signals can be projected to the photosensitive layer31through the insulating layer72and accordingly, more light signals can be received by the photosensitive layer31and the accuracy of fingerprint recognition can be improved.

In this implementation, the photosensitive layer31is embedded in the thin film transistor14, as such, there is no need to stack the photosensitive layer31and the thin film transistor14in a thickness direction of the thin film transistor array substrate12, thereby reducing the thickness of the display screen assembly10.

When the target signal b is infrared light or near-infrared light, the photosensitive layer31may be made of a material with a special response to infrared light such as lead sulfide (PbS). When the target signal b is ultraviolet light or near ultraviolet light, the photosensitive layer31may be made of a semiconductor material such as ITZO, IGZO, or the like.

Further, referring toFIG. 19, the receiving element3also includes a condenser lens32. The condenser lens32covers the photosensitive layer31. The condenser lens32is configured to condense the target signal b to the photosensitive layer31. The condenser lens32may be a convex lens, and a convex surface of the condenser lens32is away from the photosensitive layer31. An orthographic projection of the condenser lens32on the photosensitive layer31covers the photosensitive layer31.

In an implementation, the condenser lens32is spaced apart from the photosensitive layer31. The condenser lens32is located at one side of the photosensitive layer31away from the light conducting member5. The photosensitive layer31and the gate layer71may be located in the same layer. The condenser lens32may be located in the same layer as the source-drain layer73.

The condenser lens32is disposed on the photosensitive layer31, such that the condenser lens32can focus the target signal b to the photosensitive layer31. The condenser lens32has a large light receiving area and can receive more light signals, and thus the detection efficiency can be improved.

Further, referring toFIG. 19, the receiving element3further includes a filter layer33. The filter layer33may be located between the condenser lens32and the photosensitive layer31. The filter layer33may be located in the same layer as the insulating layer72. The filter layer33is used to pass through the target signal b and reflect visible lights. The filter layer33is used to filter the target signal b. The filter layer33has high permeability to the target signal b and high reflectivity to visible lights, so as to reduce an interference of external visible lights to the receiving element3.

Referring toFIG. 20, combined withFIG. 1andFIG. 19, the present disclosure also provides a method200for controlling an electronic device. The method200is applied to the electronic device100of any of the aforementioned implementations. The method200begins at block201.

At block201, the processor controls the first light source to emit the detection signal, and the detection signal is capable of interacting with the detection object to form the target signal.

At block202, the processor controls the receiving element to receive the target signal.

At block203, the processor detects the distance between the display region and the detection object according to one of the intensity of the target signal and a difference between the transmission time of the detection signal and the reception time of the target signal.

In an implementation, the first light source2transmits the first electrical signal to the processor4when transmitting the detection signal a. The processor4receives the first electrical signal and obtains first time point t1at which the first electrical signal is received. The receiving element3transmits the second electrical signal to the processor4when receiving the target signal b. The processor4receives the second electrical signal and obtains second time point t2at which the second electrical signal is received. The processor4may obtain the distance L between the detection object M and the display region1aaccording to the difference between first time point t1at which the first electrical signal is received and second time point t2at which the second electrical signal is received, and in combined with the wavelength of the detection signal.

When the processor4detects that the distance L between the detection object M and the display region1ais less than the preset value, the processor4controls the second light source6to turn off. When the processor4detects that the distance L between the detection object M and the display region1ais greater than or equal to the preset value, the processor4controls the second light source6to turn on.

In an implementation, when the display region1ais in a screen-on state (that is, the second light source6is on) and the distance L between the detection object M and the display region1ais less than the preset value, the processor4controls the second light source6to turn off. The preset value may range from 3 cm to 5 cm for example. When the distance L between the detection object M and the display region1ais less than the preset value, it indicates that the detection object M is close to the display region1a, and the processor4may control the second light source6to turn off to reduce power loss and misoperation. The above operations can be carried out in circumstances such as when a user answers a call without turning off the display region1a, when the user puts the electronic device100in his pocket without turning off the display region1a, etc. When the display region1ais in an off-screen state (that is, the second light source6is off) and the distance L between the detection object M and the display region1ais greater than the preset value, the processor4controls the second light source6to light up. As an option, the preset value can be 10 cm. When the distance L between the detection object M and the display region1ais greater than the preset value, it indicates that the detection object M is away from the display region1a, and the processor4can light up the second light source6to provide the user with a display environment to facilitate the user to perform subsequent operations on the electronic device100. The above operations can be carried out in a circumstance that the display region1ais off while the user answers a call, etc.

Different from the previous implementation, in an implementation the receiving element3transmits a third electrical signal to the processor4when receiving the target signal b. In this implementation, a greater intensity of the target signal b indicates a third electrical signal with a greater intensity. The processor4can determine the distance L between the detection object M and the display region1aaccording to the intensity of the third electrical signal received, and control the second light source6to turn on or turn off. In this implementation, the intensity of the target signal b decreases as the distance L between the detection object M and the display region1aincreases, and the intensity of the second electrical signal decreases as the intensity of the target signal b decreases.

When the processor4detects that the second light source6is off and the intensity of the second electrical signal is less than or equal to the preset value of the electrical signal, the distance L between the detection object M and the display region1ais greater than or equal to the preset value, and the processor4may control the second light source6to light up. When the processor4detects that the second light source6is on and the intensity of the second electrical signal is greater than the preset value of the electrical signal, the distance L between the detection object M and the display region1ais less than the preset value, and the processor4may control the second light source6to turn off.

The above description are preferred implementations of the present disclosure, and it is noted that various improvements and modifications can be made without departing from the principle of the application to those of ordinary skill in the art, and the improvement and the modification are also considered as the protection scope of the present disclosure.