CN112732012B - Electronic equipment - Google Patents

Abstract

The disclosure relates to an electronic device, which comprises a device main body and a distance sensing module. The optical filter is arranged for the distance sensing module, so that the optical filter is matched with the receiving end of the light receiving piece to filter interference light. The light emitting part emits light out of the equipment main body through the light transmitting part of the equipment main body, and forms first reflected light after encountering an external obstacle; the outgoing light rays encounter the reflecting part of the equipment main body to form second reflected light rays, and at least one of the outgoing light rays and the second reflected light rays forms interference light rays aiming at the first reflected light rays. The filter can prevent the light receiving part from receiving the interference light, and improves the sensing precision of the distance sensing module for determining the position of the external obstacle according to the first reflected light.

Description

Electronic equipment

Technical Field

The present disclosure relates to the field of electronic technology, and in particular to electronic equipment.

Background technique

In the related art, electronic devices such as mobile phones usually include a front distance sensing module to sense the distance between external obstacles and the electronic device, and realize functions such as turning off the screen and lighting the screen according to the judgment of the above distance. However, due to the increase in the screen ratio of electronic devices, the assembly space and light propagation path of the distance sensing module are compressed, and interference light is generated inside the electronic device to the receiving end of the distance sensing module, thereby reducing the sensing accuracy of the distance sensing module.

Summary of the invention

The present disclosure provides an electronic device to optimize the structural setting of a distance sensing module to avoid the influence of interference light on the sensing accuracy of the distance sensing module.

According to an embodiment of the present disclosure, an electronic device is provided, the electronic device comprising a device body and a distance sensing module;

The distance sensing module is arranged below the screen of the device body, and the distance sensing module comprises a sensing body and a light emitting element, a light receiving element and a light filter element assembled on the sensing body;

The device body comprises a light-transmitting portion and a reflecting portion; the emitted light emitted by the light-emitting element is emitted from the outside of the device body through the light-transmitting portion, and forms a first reflected light after encountering an external obstacle; the emitted light forms a second reflected light after encountering the reflecting portion;

The emitted light and/or the second reflected light form interference light for the first reflected light, and the filter element is arranged at the receiving end of the light receiving element to filter the interference light.

Optionally, the optical filter is an optical film layer arranged at the receiving end.

Optionally, the distance sensing module further includes a shading member; the shading member is disposed between the light emitting member and the light receiving member to block the interfering light through the shading member.

Optionally, the shading member is arranged on an upper surface of the sensing body facing the screen, and extends to an inner side surface of the screen.

Optionally, the emitting end of the light emitting element is provided with an emitting port, and the cross-sectional shape of the emitting port is semicircular.

Optionally, the light-transmitting portion is a gap formed by a first side wall of the screen and a second side wall of the middle frame of the device body, and a light-absorbing layer is provided on the first side wall and the second side wall.

Optionally, the light-transmitting portion is arranged on the screen, and the structural size of the light-transmitting portion is smaller than the minimum visual resolution threshold of the naked eye.

Optionally, the light emitting element and/or the light receiving element are arranged to be tilted relative to the screen so that an overlapping area between an emission range of the emitted light and a receiving range of the light receiving element moves up a preset distance toward the screen.

Optionally, the distance sensing module further includes a light focusing element, and the light focusing element cooperates with the emitting end of the light emitting element.

Optionally, the light emitting element is a vertical cavity surface emitting laser.

Optionally, the reflecting portion includes at least one of an inner side surface of the screen and a middle frame of the device body.

The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

The present disclosure provides a filter for the distance sensing module so that the filter cooperates with the receiving end of the light receiving element to filter the interference light. The emitted light emitted by the light emitting element is emitted to the outside of the device body through the light-transmitting part of the device body, and forms a first reflected light after encountering an external obstacle; the emitted light encounters the reflecting part of the device body to form a second reflected light, and at least one of the emitted light itself and the second reflected light forms an interference light for the first reflected light. The filtering of the interference light by the filter can prevent the light receiving element from receiving the interference light, thereby improving the sensing accuracy of the distance sensing module in determining the position of the external obstacle based on the first reflected light.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

BRIEF DESCRIPTION OF THE 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 present disclosure.

FIG1 is a schematic structural diagram of an electronic device in an exemplary embodiment of the present disclosure;

FIG2 is a schematic diagram of a partially enlarged structure of an electronic device in an exemplary embodiment of the present disclosure;

FIG3 is a schematic diagram of a partially enlarged structure of an electronic device in another exemplary embodiment of the present disclosure;

FIG4 is a schematic diagram of a partially enlarged structure of an electronic device in another exemplary embodiment of the present disclosure;

FIG5 is a schematic diagram of a partially enlarged structure of an electronic device in yet another exemplary embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of an electronic device in another exemplary embodiment of the present disclosure.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

In the related art, electronic devices such as mobile phones usually include a front distance sensing module to sense the distance between external obstacles and the electronic device, and realize functions such as turning off the screen and lighting the screen according to the judgment of the above distance. However, due to the increase in the screen ratio of electronic devices, the assembly space and light propagation path of the distance sensing module are compressed, and interference light is generated inside the electronic device to the receiving end of the distance sensing module, thereby reducing the sensing accuracy of the distance sensing module.

FIG. 1 is a schematic diagram of the structure of an electronic device in an exemplary embodiment of the present disclosure. As shown in FIG. 1 , the electronic device 1 includes a device body 11 and a distance sensing module 12. The distance sensing module 12 is arranged below the screen 111 of the device body 11, and the distance sensing module 12 includes a sensing body 124 and a light emitting element 121, a light receiving element 122 and a filter element 123 assembled on the sensing body 124. The device body 11 includes a light-transmitting portion 112 and a reflecting portion 113. The emitted light emitted by the light emitting element 121 is emitted from the outside of the device body 11 through the light-transmitting portion 112, and forms a first reflected light after encountering an external obstacle 2. The emitted light forms a second reflected light after encountering the reflecting portion 113. Among them, as shown in FIG. 1 , the solid arrow represents the emitted light, the dotted arrow represents the second reflected light, and the dot-dash arrow represents the first reflected light. The emitted light and/or the second reflected light form an interference light for the first reflected light, and the filter element 123 is arranged at the receiving end 1221 of the light receiving element 122 to filter the interference light.

It should be noted that the above-mentioned reflecting part 113 can be at least one of the inner side surface 1111 of the screen 111, the inner wall of the middle frame 114 of the device body 11 and other internal structures of the device body 11, so as to form a reflection of the emitted light. The present disclosure does not limit the specific structure and position of the reflecting part 113.

By providing a filter 123 for the distance sensing module 12, the filter 123 is matched with the receiving end 1221 of the light receiving element 122 to filter out the interfering light. The emitted light emitted by the light emitting element 121 is emitted from the outside of the device body 11 through the light-transmitting portion 112 of the device body 11, and forms a first reflected light after encountering the external obstacle 2; the emitted light encounters the reflecting portion 113 of the device body 11 to form a second reflected light, and at least one of the emitted light itself and the second reflected light forms an interfering light for the first reflected light. Since the interfering light will form a background noise at the light receiving element 122, the filtering of the interfering light by the filter 123 can prevent the light receiving element 122 from receiving the interfering light, thereby improving the sensing accuracy of the distance sensing module 12 in determining the position of the external obstacle 2 according to the first reflected light.

In the above embodiment, the optical filter 123 can filter out the light emitted toward the surface of the receiving end 1221 within a preset angle range. For example, the preset angle range can be a range with an angle of less than 15 degrees to the surface of the receiving end 1221. When the emitted light is emitted from the light emitting element 121, it propagates toward the light receiving element 122 and is emitted toward the receiving end 1221 at a direction with an angle of 5 degrees to the surface of the receiving end 1221. The optical filter 123 filters out the emitted light, so that the emitted light cannot enter the light receiving element 122. The preset angle range can be set according to parameters such as the emission angle of the emitted light, the positional relationship of the internal structure of the distance sensing module 12, and the present disclosure is not limited to this.

Among them, the filter 123 can be an optical film layer arranged at the receiving end 1221 of the light receiving element 122. The above optical film layer can be directly formed at the receiving end 1221 of the light receiving element 122 through a coating process to reduce the assembly process of the filter 123; the optical film layer can also be arranged at the receiving end 1221 of the light receiving element 122 through a subsequent bonding process to reduce the process cost. The light and thin structure based on the optical film layer reduces the occupation of the internal space of the distance sensing module 12 by the filter 123, and avoids the structural interference of the filter 123 with other functional modules of the distance sensing module 12. Alternatively, the above filter 123 can also be a filter structure with a filtering function, and the filter structure is assembled above the receiving end 1221 of the light receiving element 122.

It should be noted that the above-mentioned receiving end 1221 can be a photodiode (PD) arranged on the light receiving element 122, and the photodiode can convert the light received by the light receiving element 122 into a current signal, so that the sensing body 124 can judge the distance between the external obstacle 2 that forms the above-mentioned reflected light and the screen 111 according to the above-mentioned current signal.

As shown in FIG2 , the emitted light is emitted from the light emitting element 121, the range between the solid arrows represents the emission range of the emitted light, and the range between the dotted arrows represents the receiving range of the light receiving element 122. In order to enhance the isolation effect against interfering light, the distance sensing module 12 may further include a shading element 125, which is disposed between the light emitting element 121 and the light receiving element 122 to block the interfering light through the shading element 125. When the intersection of the emission range and the receiving range is below the inner side 1111 of the screen 111, part of the emitted light will form a second reflected light with the reflecting portion 113 of the device body 11; and there is also part of the emitted light that is directly emitted to the light receiving element 122, and the interfering light at this time is composed of the second reflected light and the emitted light. The light shielding member 125 disposed between the light emitting member 121 and the light receiving member 122 can change the optical paths of the emitted light and the second reflected light, and move the overlapping area of the emission range and the receiving range toward the screen 111, thereby further reducing or even preventing the second reflected light from emitting to the light receiving member 122. The light shielding member 125 cooperates with the light filter 123 to provide double protection for blocking interfering light.

Further, as shown in FIG3 , the shading member 125 is disposed on the upper surface 1241 of the sensing body 124 facing the screen 111, and extends to the inner side surface 1111 of the screen 111. That is, the shading member 125 is completely blocked between the light emitting member 121 and the light receiving member 122 to prevent the emitted light and the second reflected light from emitting toward the light receiving member 122, thereby improving the sensing accuracy of the distance sensing module 12.

In addition to setting the shading member 125 to move the overlapping area of the emission range and the receiving range toward the screen 111, the position of the overlapping area of the emission range and the receiving range can also be changed in the manner shown in the following embodiments, thereby reducing or even preventing the second reflected light from being directed to the light receiving element 122:

In one embodiment, the emitting end 1211 of the light emitting element 121 is provided with an emitting port, and the cross-sectional shape of the emitting port is semicircular, so as to change the optical path of the emitted light, thereby causing the overlapping area of the emission range and the receiving range to move upward. Since the upward movement of the overlapping area can reduce or even prevent the second reflected light from being emitted to the light receiving element 122, the above structural setting reduces the background noise formed by the interference light at the light receiving element 122, thereby improving the accuracy of distance sensing.

In another embodiment, the light emitting element 121 and/or the light receiving element 122 are tilted relative to the screen 111 so that the overlapping area of the emission range of the emitted light and the receiving range of the light receiving element 122 are moved up toward the screen 111 by a preset distance. That is, as shown in FIG4 , the light emitting element 121 can be tilted relative to the screen 111 alone to change the optical path of the emitted light, thereby causing the overlapping area of the emission range and the receiving range to move up. The light receiving element 122 can also be tilted relative to the screen 111 alone so that the receiving range is deflected toward the side away from the emission range, thereby causing the overlapping area of the emission range and the receiving range to move up. Alternatively, as shown in FIG5 , the light emitting element 121 and the light receiving element 122 can also be tilted relative to the screen 111 at the same time so that the emission range is deflected toward the side away from the emission range, and the receiving range is deflected toward the side away from the receiving range, thereby causing the overlapping area of the emission range and the receiving range to move up. Since the upward movement of the overlapping area can reduce or even prevent the second reflected light from being directed to the light receiving element 122 , the above structural arrangement reduces the background noise formed by the interference light at the light receiving element 122 , thereby improving the accuracy of distance sensing.

It should be noted that by moving the overlapping area of the emitting range and the receiving range above the inner side surface 1111 of the screen 111 in the above manner, not only can the second reflected light be reduced or even prevented from being directed to the light receiving element 122, but also the interference of the reflected light formed by black hair and oil stains on the screen 111 with the first reflected light can be solved.

In addition, the distance sensing module 12 can be used with a normal screen 111 or with a full screen, and the present disclosure does not limit this. The following uses several configurations and configuration positions of the light-transmitting portion 112 as examples to illustrate the structural improvement of the electronic device 1:

In one embodiment, as shown in FIG. 6 , the light-transmitting portion 112 is a gap formed by the first side wall 1112 of the screen 111 and the second side wall 1141 of the middle frame 114 of the device body 11, and a light-absorbing layer 115 is provided on the first side wall 1112 and the second side wall 1141. That is, the emitted light and the first reflected light propagate through the gap between the screen 111 and the middle frame 114 to improve the display ratio of the screen 111 and the overall display effect. The above-mentioned gap compresses the assembly space and light propagation path of the distance sensing module 12. In the above-mentioned embodiment, the filter 123 and the light shielding member 125 can block the interfering light, thereby reducing the influence of the interfering factors such as the structural size and assembly space of the distance sensing module 12 on the distance sensing accuracy. And the light-absorbing layer 115 provided on the first side wall 1112 and the second side wall 1141 can absorb the emitted light irradiated thereon, and avoid the generation of reflected light interfering with the first reflected light, thereby further improving the accuracy of distance sensing. Furthermore, the surface of the light absorbing layer 115 may be configured to be a frosted structure, so that the emitted light irradiated on the light absorbing layer 115 is diffusely reflected, thereby reducing the influence of the reflected light on the first reflected light.

It should be noted that the size of the above-mentioned gap can be smaller than 1 mm, for example, the size of the gap is 0.6 mm or 0.8 mm, so as to reduce the impact of the gap on the overall appearance of the electronic device.

In another embodiment, the light-transmitting portion 112 is disposed on the screen 111, and the structural dimensions of the light-transmitting portion 112 are smaller than the minimum visual resolution threshold of the naked eye, so as to improve the display ratio and the overall display effect of the screen 111. Due to the size limitation of the light-transmitting portion 112, the assembly space and light propagation path of the distance sensing module 12 are compressed, and the filter 123 and the light shielding member 125 in the above embodiment can block interfering light, thereby reducing the influence of interfering factors such as the structural dimensions and assembly space of the distance sensing module 12 on the distance sensing accuracy.

Among them, when the screen 111 is a full screen, the light-transmitting portion 112 is arranged in the display area of the screen 111; when the screen 111 is a normal screen, that is, the screen 111 includes a display area and a non-display area, the light-transmitting portion 112 can be arranged in the display area or the non-display area.

It should be noted that the structural size of the light-transmitting portion 112 is smaller than the minimum visual resolution threshold of the naked eye. The minimum visual resolution threshold of the naked eye forms the minimum size range that the human naked eye can observe. When the structural size of the light-transmitting portion 112 is smaller than the value within this range, the user cannot observe the light-transmitting portion 112. From the appearance, the screen 111 has a complete display and appearance effect. When setting the visual resolution threshold, taking into account the individual differences of different users, a large number of experiments can be conducted to obtain the average value of the visual resolution thresholds of a large number of users as the above-mentioned minimum visual resolution threshold of the naked eye; alternatively, the theoretical value of the minimum size range that the human naked eye can observe can also be used as the above-mentioned minimum visual resolution threshold of the naked eye. The setting of the minimum visual resolution threshold of the naked eye can be freely set based on different application scenarios (daytime, nighttime, etc.), user groups and other factors that affect the human visual experience, and the present disclosure does not make specific limitations on this.

Preferably, based on the observation ability of the naked eye and the setting requirements and processing technology of the screen 111, the minimum visual resolution threshold of the naked eye can be less than or equal to 100 microns, so as to improve the concealment of the light-transmitting portion 112 and increase the overall appearance and display effect of the screen 111. Alternatively, based on the application scenarios of the screen 111 and different user groups, the range of the minimum visual resolution threshold of the naked eye can also be slightly increased, for example, the minimum visual resolution threshold of the naked eye is less than or equal to 150 microns, so as to reduce the processing difficulty under the premise of ensuring the overall display effect of the screen 111.

It should be noted that the light-transmitting portion 112 may be a light-transmitting hole provided on the screen 111, or a light-transmitting structure provided on the screen 111 to match the type of emitted light, and the present disclosure does not limit this. Taking the light-transmitting portion 112 as a light-transmitting structure as an example, when the light emitting element is an infrared emitting element, the material of the light-transmitting structure may be a material with an infrared transmittance of more than 80% to ensure the sensing effect of the distance sensing module 12.

Based on the above situation that the structural size of the light-transmitting portion 112 is smaller than the minimum visual resolution threshold of the naked eye, or other situations where the structural size of the light-transmitting portion 112 is relatively small, it is also necessary to limit the emission angle α of the light emitted by the light emitting element 121. This can be achieved in the following ways:

In one embodiment, the light emitting element 121 may be a vertical cavity surface emitting laser, which has a small emission angle α and concentrated emission energy. On the one hand, it requires a smaller structural size of the light-transmitting portion 112, which helps to increase the screen 111 ratio. On the other hand, the emission range of the emitted light is concentrated, which reduces the second reflected light formed after the emitted light meets the reflecting portion 113, thereby helping to reduce the background noise interference of the interfering light on the light receiving element 122.

In another embodiment, the light emitting element 121 may be a vertical cavity surface emitting laser (Vscel) or an infrared light emitting diode (LED), and the distance sensing module 12 further includes a focusing element (not marked), which cooperates with the emitting end 1211 of the light emitting element 121 to reduce the emission angle α of the emitted light and the light scattering range. When the light emitting element 121 is an infrared light emitting diode, the emitted light is infrared light. In particular, the infrared ray may be an infrared ray of 850nm/940nm. During the use of the light emitting element 121, the emission angle α of the infrared light is large, and there are many reflected light paths. Most of the emitted light generates a second reflected light through the reflecting part 113 of the device body 11 after being emitted, which interferes with the sensing accuracy of the distance sensing module 12. At this time, the focusing element can reduce the emission angle α of the infrared light so that the emitted light is gathered to a preset range.

When the light emitting element 121 is a vertical cavity surface emitting laser, the emitted light is laser, and the focusing element can further reduce the emission angle α of the laser to gather the emitted light. On the one hand, the further gathered emitted light further reduces the structural size requirements of the light-transmitting portion 112, thereby helping to increase the screen 111 ratio; on the other hand, the emission range of the emitted light is further concentrated, reducing the second reflected light formed after the emitted light meets the reflecting portion 113, thereby helping to reduce the background noise interference of the interfering light on the light receiving element 122.

By providing a filter 123 for the distance sensing module 12, the filter 123 is matched with the receiving end 1221 of the light receiving element 122 to filter the interference light. The emitted light emitted by the light emitting element 121 is emitted from the outside of the device body 11 through the light-transmitting portion 112 of the device body 11, and forms a first reflected light after encountering the external obstacle 2; the emitted light encounters the reflecting portion 113 of the device body 11 to form a second reflected light, and at least one of the emitted light itself and the second reflected light forms an interference light for the first reflected light. The filtering of the interference light by the filter 123 can prevent the light receiving element 122 from receiving the interference light, thereby improving the sensing accuracy of the distance sensing module 12 to the position of the external obstacle 2.

Those skilled in the art will readily come up with other embodiments of the present disclosure after considering the specification and practicing the technical solutions disclosed herein. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

It should be understood that the present disclosure is not limited to the exact structures that have been 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 (10)

1. An electronic device, characterized in that it comprises a device body and a distance sensing module; The distance sensing module is arranged below the screen of the device body, and the distance sensing module comprises a sensing body and a light emitting element, a light receiving element and a light filter element assembled on the sensing body; The device body comprises a light-transmitting portion and a reflecting portion; the emitted light emitted by the light-emitting element is emitted from the outside of the device body through the light-transmitting portion, and forms a first reflected light after encountering an external obstacle; the emitted light forms a second reflected light after encountering the reflecting portion; The emitted light and/or the second reflected light form interference light for the first reflected light, and the filter element is arranged at the receiving end of the light receiving element to filter the interference light; The light emitting element has an emitting range, and the light receiving element has a receiving range. The light emitting element and the light receiving element are tilted relative to the screen, and the emitting range is deflected toward a side away from the receiving range, and the receiving range is deflected toward a side away from the emitting range, so that the overlapping area of the emitting range of the emitted light and the receiving range of the light receiving element moves up a preset distance toward the screen. 2 . The electronic device according to claim 1 , wherein the optical filter is an optical film layer arranged at the receiving end. 3. The electronic device according to claim 1 is characterized in that the distance sensing module further comprises a shading member; the shading member is arranged between the light emitting member and the light receiving member to block the interfering light through the shading member. 4 . The electronic device according to claim 3 , wherein the shading member is arranged on an upper surface of the sensing body facing the screen and extends to an inner side surface of the screen. 5 . The electronic device according to claim 1 , wherein the emitting end of the light emitting element is provided with an emitting port, and the cross-sectional shape of the emitting port is semicircular. 6. The electronic device according to claim 1, characterized in that the light-transmitting portion is a gap formed by a first side wall of the screen and a second side wall of the middle frame of the device body, and a light-absorbing layer is provided on the first side wall and the second side wall. 7 . The electronic device according to claim 1 , wherein the light-transmitting portion is arranged on the screen, and a structural size of the light-transmitting portion is smaller than a minimum visual resolution threshold of naked eyes. 8 . The electronic device according to claim 1 , wherein the distance sensing module further comprises a light focusing element, and the light focusing element cooperates with the emitting end of the light emitting element. 9 . The electronic device according to claim 1 , wherein the light emitting element is a vertical cavity surface emitting laser. 10 . The electronic device according to claim 1 , wherein the reflection portion includes at least one of an inner side surface of the screen and a middle frame of the device body.