An image receiver and electronic device

Abstract

This application provides an image receiver and an electronic device, relating to the field of biometric technology. The image receiver's first photosensitive unit, in conjunction with a first filter film on its photosensitive side, enables image capture. A second photosensitive unit, in conjunction with a polarization element on its photosensitive side, receives light carrying polarization information for target identification. Furthermore, the second photosensitive unit, with the aid of a second filter film on its photosensitive side, can receive light in the target wavelength range, such as infrared light, to reduce ambient light interference and improve the accuracy of depth information acquisition. Therefore, by integrating the first and second photosensitive units, the image receiver can achieve both image capture and target identification functions. When applied to electronic devices, only a window needs to be created for the image receiver, reducing the number of windows and the encroached display area, thus improving the display effect.

Description

Technical Field

[0001] This application relates to the field of biometric technology, and more specifically, to an image receiver and an electronic device. Background Technology

[0002] With the development of portable terminal devices, the application of biometric technology is becoming increasingly widespread and in-depth. Taking electronic devices as an example, fingerprint recognition and facial recognition are increasingly used in device screen wake-up and identity authentication steps in various programs, improving device security and the flexibility of usage.

[0003] Currently, electronic devices typically require separate windows on the display screen for the front-facing camera and facial recognition module, which encroaches on a significant portion of the display area and affects the display quality. Utility Model Content

[0004] The purpose of this application is to provide an image receiver and electronic device in order to address the shortcomings of the prior art.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0006] In one aspect of this application, an image receiver is provided, including a photosensitive unit array, with a first filter film and a second filter film disposed on the photosensitive side of the photosensitive unit array;

[0007] The photosensitive unit array includes multiple photosensitive units distributed in an array. The multiple photosensitive units are divided into several first photosensitive units and several second photosensitive units. A first filter film is located on the photosensitive side of the first photosensitive unit. The bandpass of the first filter film includes the visible light band. A second filter film is located on the photosensitive side of the second photosensitive unit. The bandpass of the second filter film is the target band, which is in the infrared band.

[0008] At least one polarization element is provided on the photosensitive side of the second photosensitive unit. The second photosensitive unit is used to receive light carrying polarization information, and the polarization information corresponds to the contour surface of the target object.

[0009] Optionally, the polarization element is also located on the photosensitive side of the first photosensitive unit.

[0010] Optionally, the first filter film and the second filter film are disposed in the same layer.

[0011] Optionally, the first photosensitive unit is uniformly distributed on the photosensitive surface of the photosensitive unit array.

[0012] Optionally, the second photosensitive unit is uniformly distributed on the photosensitive surface of the photosensitive unit array.

[0013] Optionally, the number of first photosensitive units is greater than the number of second photosensitive units.

[0014] Optionally, the image receiver also includes an optical path guiding layer located on the photosensitive side of the photosensitive unit array, and polarization elements are disposed in the optical path guiding layer.

[0015] Optionally, a light-transmitting hole is formed on the optical path guiding layer, corresponding to the first photosensitive unit and the second photosensitive unit respectively, and the polarization element is positioned corresponding to the light-transmitting hole.

[0016] Optionally, the image receiver also includes a microlens array located on the photosensitive side of the photosensitive unit array, with polarizing elements located on the side of the microlens array facing away from the photosensitive unit array.

[0017] Optionally, the image receiver also includes a lens located on the photosensitive side of the photosensitive unit array, with polarizing elements located on the surface or inside the lens.

[0018] Optionally, the image receiver also includes pixel circuitry, which includes control circuitry and multiple signal output circuits;

[0019] The control circuit is electrically connected to multiple photosensitive units and is configured to activate the photosensitive units in the photosensitive unit array row by row.

[0020] Multiple signal output circuits correspond one-to-one with multiple rows of photosensitive units. When a row of photosensitive units includes a first photosensitive unit and a second photosensitive unit, the signal output circuit corresponding to that row of photosensitive units includes a first output circuit and a second output circuit connected in parallel. The first photosensitive unit is electrically connected to the first output circuit, and the second photosensitive unit is electrically connected to the second output circuit.

[0021] Optionally, the pixel circuit also includes multiple pixel processing circuits, each corresponding to a different signal output circuit.

[0022] When a signal output circuit includes a first output circuit and a second output circuit, the pixel processing circuit corresponding to the signal output circuit includes a first processing circuit and a second processing circuit connected in parallel. The first output circuit is electrically connected to the first processing circuit, and the second output circuit is electrically connected to the second processing circuit.

[0023] Optionally, the control circuit includes multiple row control circuits;

[0024] Multiple line control circuits correspond one-to-one with multiple line photosensitive units. When a line photosensitive unit includes a first photosensitive unit and a second photosensitive unit, the line control circuit corresponding to that line photosensitive unit includes an independent first line gating switch circuit and a second line gating switch circuit. The first photosensitive unit is electrically connected to the first line gating switch circuit, and the second photosensitive unit is electrically connected to the second line gating switch circuit.

[0025] The activation periods of any two line control circuits do not overlap;

[0026] In the same row control circuit, the activation period of the first row gating switch circuit includes the activation period of the second row gating switch circuit, or the activation periods of the first row gating switch circuit and the second row gating switch circuit do not overlap.

[0027] Optionally, the pixel circuit also includes multiple third processing circuits, each corresponding to a signal output circuit.

[0028] When a signal output circuit includes a first output circuit and a second output circuit, the first output circuit and the second output circuit of the signal output circuit are electrically connected to the corresponding third processing circuit respectively; the on / off states of the first output circuit and the second output circuit are mutually exclusive.

[0029] Optionally, the control circuit includes multiple third-row gating switch circuits, each corresponding to and electrically connected to multiple rows of photosensitive units, and the activation periods of any two third-row gating switch circuits do not overlap.

[0030] In another aspect of the embodiments of this application, an electronic device is provided, including a device body and an image receiver as described above, wherein the image receiver is disposed on the device body.

[0031] Optionally, the electronic device also includes a light source, which is also located on the main body of the device. The light emitted by the light source is reflected by the target object and carries polarization information corresponding to the contour surface of the target object, and is incident on the image receiver.

[0032] Optionally, the main body of the device includes a display screen, and an image receiver is disposed below the display screen.

[0033] The beneficial effects of this application include:

[0034] This application provides an image receiver and an electronic device. The image receiver's first photosensitive unit, in conjunction with a first filter film on its photosensitive side, enables image capture. A second photosensitive unit, in conjunction with a polarization element on its photosensitive side, receives light carrying polarization information for target object identification. Furthermore, the second photosensitive unit, with the aid of a second filter film on its photosensitive side, can receive light in the target wavelength range, such as infrared light, to reduce ambient light interference and improve the accuracy of depth information acquisition. Therefore, by integrating the first and second photosensitive units, the image receiver can achieve both image capture and target object identification functions. When applied to an electronic device, only a window needs to be created for the image receiver, reducing the number of windows and the encroached display area, thus improving the display effect. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the hierarchical structure of an image receiver provided in an embodiment of this application;

[0037] Figure 2 A schematic diagram of the hierarchical structure of another image receiver provided in an embodiment of this application;

[0038] Figure 3 A schematic diagram of a photosensitive unit array provided in an embodiment of this application;

[0039] Figure 4 A schematic diagram of the hierarchical structure of another image receiver provided in an embodiment of this application;

[0040] Figure 5 A schematic diagram of the hierarchical structure of another image receiver provided in an embodiment of this application;

[0041] Figure 6 This is one of the schematic diagrams of a pixel circuit provided in an embodiment of this application;

[0042] Figure 7 This is a second schematic diagram of a pixel circuit provided in an embodiment of this application;

[0043] Figure 8 This is the third schematic diagram of a pixel circuit provided in an embodiment of this application;

[0044] Figure 9 This is the fourth schematic diagram of a pixel circuit provided in the embodiments of this application;

[0045] Figure 10 One of the schematic diagrams illustrating the on-time period of the first and second photosensitive units provided in this application embodiment;

[0046] Figure 11 A second schematic diagram illustrating the on-time period of the first and second photosensitive units provided in this application embodiment;

[0047] Figure 12 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0048] Icons: 100-Image receiver; 101-Substrate; 110-Photosensitive unit array; 111-Photosensitive unit; 111a-First photosensitive unit; 111b-Second photosensitive unit; 120-Filter layer; 121-First filter film; 122-Second filter film; 130-Polarization layer; 131-Polarization element; 132-Transmitting layer; 140-Optical path guiding layer; 141-Transmitting aperture; 150-Protective layer; 160-Microlens array; 170-Lens; 181-First ray; 182-Second ray 210 - Control circuit; 211 - First row gating switch circuit; 212 - Second row gating switch circuit; 213 - Third row gating switch circuit; 220 - Signal output circuit; 221 - First output circuit; 222 - Second output circuit; 231 - First processing circuit; 232 - Second processing circuit; 233 - Third processing circuit; 241 - First selection switch; 242 - Second selection switch; 300 - Light source; 400 - Main body of the device; 410 - Middle frame; 420 - Display screen. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] In one aspect of this application, an image receiver is provided, including a photosensitive unit array. A first filter film and a second filter film are disposed on the photosensitive side of the photosensitive unit array. The photosensitive unit array includes a plurality of photosensitive units distributed in an array, and the plurality of photosensitive units are divided into a plurality of first photosensitive units and a plurality of second photosensitive units. The first filter film is located on the photosensitive side of the first photosensitive unit, and the bandpass band of the first filter film includes the visible light band. The second filter film is located on the photosensitive side of the second photosensitive unit, and the bandpass band of the second filter film is the target band, which is in the infrared band. At least one polarization element is disposed on the photosensitive side of the second photosensitive unit, and the second photosensitive unit is used to receive light carrying polarization information, the polarization information corresponding to the contour surface of the target object.

[0051] The image receiver's photosensitive unit array includes a first photosensitive unit and a second photosensitive unit. The first photosensitive unit, in conjunction with its first filter film on its photosensitive side, can receive light in the visible light band to achieve shooting functions, such as the shooting function of a front or rear camera. The captured images (such as black and white images, color images, etc.) can be displayed on the screen for convenient viewing and editing by the user. The second photosensitive unit, in conjunction with its polarization element on its photosensitive side, can receive light carrying polarization information (such as light with at least two different polarization directions reflected by the contour surface of the target object, thereby forming at least two polarized images. The difference between the different polarized images can be used to obtain the depth information of the target object, i.e., three-dimensional information, so as to facilitate accurate reconstruction of the target object's contour surface) to achieve target object recognition, such as face recognition (including but not limited to face matching verification and / or anti-counterfeiting recognition). On this basis, the second photosensitive unit, with the help of its second filter film on its photosensitive side, can receive light in the target wavelength band, such as light in the infrared band, in order to reduce the interference of ambient light and improve the accuracy of depth information acquisition. Therefore, by integrating the first photosensitive unit and the second photosensitive unit, the image receiver can be used to realize the functions of shooting and object recognition. When applied to electronic devices, only a window needs to be opened for the image receiver, which can reduce the number of windows and the area of ​​the display area occupied, thus helping to improve the display effect of the screen.

[0052] It should be understood that the target object in this application can be a human face, a part of a human face (such as cheeks, nose, eyes), but it is not limited to this. It can also be other objects with three-dimensional dimensions, such as fingers, palms, etc. For ease of understanding, the following description will use a human face as an example. When the target object changes, those skilled in the art should be able to clearly understand the changed solution by referring to the following examples.

[0053] Figure 1 This is a schematic diagram of the hierarchical structure of an image receiver provided in an embodiment of this application. Figure 1 The image receiver 100 shown includes a photosensitive unit array 110, a filter layer 120, and a polarizing layer 130.

[0054] The photosensitive unit array 110 includes multiple photosensitive units 111 arranged in the same layer and arrayed. These multiple photosensitive units 111 can be divided into several first photosensitive units 111a and several second photosensitive units 111b according to their functions. For example... Figure 1 The image shows three first photosensitive units 111a and one second photosensitive unit 111b.

[0055] The first filter film 121 is located on the photosensitive side of the first photosensitive unit 111a. In other words, the first filter film 121 and the first photosensitive unit 111a are directly opposite each other in the normal direction of the first photosensitive unit 111a. This allows the light rays (called the first light rays 181) incident on the first photosensitive unit 111a to be filtered by the first filter film 121 first, so that the light rays in the visible light band are incident on the first photosensitive unit 111a, thereby reducing interference and improving the imaging quality of the image receiver 100 when it takes pictures through the first photosensitive unit 111a. It should be understood that when the captured image needs to be displayed as a color image, the multiple first photosensitive units 111a should be able to perceive color information. Therefore, the first filter film 121 corresponding to the multiple first photosensitive units 111a needs to be divided into color filter films. For example, the bandpass of the first filter film 121 corresponding to some of the first photosensitive units 111a is the red light band, the bandpass of the first filter film 121 corresponding to some of the first photosensitive units 111a is the green light band, and the bandpass of the first filter film 121 corresponding to some of the first photosensitive units 111a is the blue light band.

[0056] The second filter film 122 is located on the photosensitive side of the second photosensitive unit 111b. Similarly, in the normal direction of the second photosensitive unit 111b, the second filter film 122 and the second photosensitive unit 111b are directly opposite each other. This allows the light rays incident on the second photosensitive unit 111b (hereinafter referred to as the second light ray 182) to be filtered by the second filter film 122 first, so that the light rays in the target wavelength band (belonging to the infrared band) are incident on the second photosensitive unit 111b. This makes the wavelength band sensed by the second photosensitive unit 111b different from the wavelength band sensed by the first photosensitive unit 111a. By utilizing this difference, the potential mutual interference between the two during use can be reduced.

[0057] It should be understood that, such as Figure 1 As shown, the first filter film 121 and the second filter film 122 can be disposed in the same layer to form the filter layer 120. It should be understood that the first filter film 121 and the second filter film 122, the first filter film 121 and the second filter film 122, and the second filter film 122 can be separated by an opaque material, such as a black light-absorbing material. In addition, the first filter film 121 and the second filter film 122 can also be disposed in different layers (not shown in the figure) to meet more flexible and varied needs.

[0058] The polarization element 131 is disposed at least on the photosensitive side of the second photosensitive unit 111b, for example... Figure 1In this design, a polarization element 131 is provided only on the photosensitive side of the second photosensitive unit 111b, while no polarization element 131 is provided on the photosensitive side of the first photosensitive unit 111a. This allows the second photosensitive unit 111b to receive light carrying polarization information, thereby enabling face recognition.

[0059] Specifically, it should first be understood that polarized light (second ray 182) has the following characteristics: when polarized light is transmitted to the surface of a target object and reflected by the target object, the polarization state of each ray in the polarized light will change. The amount of change in the polarization state of each ray is related to the material of the target object surface to which each ray is incident and the incident angle (spatial position) of each point in the target object's contour surface. For example, when the same beam of polarized light is incident perpendicularly on surfaces of different materials, by rotating the analyzer 360 degrees to receive the reflected polarized light, it can be seen that the polarization state changes differently depending on the surface material of the target object. Similarly, when the same beam of polarized light is incident on the same white paper surface at different incident angles, by rotating the analyzer 360 degrees to receive the reflected polarized light, it can be seen that the polarization state changes differently depending on the incident angle.

[0060] Therefore, when the light source used to provide supplementary lighting for facial recognition emits two second rays 182 with different polarization directions (the degree of polarization is not equal to 0) at different time periods of 300 minutes, based on the differences in the spatial positions of each point in the facial contour surface (the incident angle of the second ray 182 is different at different points) and the material of the facial surface, the second rays 182 reflected by the face will carry polarization information corresponding to the facial contour surface. That is to say, the second ray 182 with one polarization direction will carry polarization information corresponding to the facial contour surface after being reflected by the face, and the second ray 182 with the other polarization direction will also carry polarization information corresponding to the facial contour surface after being reflected by the face. The two rays are incident on the image receiver 100 in chronological order, and then on the second photosensitive unit 111b through the second filter film 122 and the polarization element 131 (in no particular order), so that the second photosensitive unit 111b can generate two polarized images in chronological order according to the incident order of the two rays. By analyzing the differences between two polarization images, information about the face in the depth direction can be obtained. Based on this, the facial contour can be reconstructed more accurately, which helps to achieve high-precision face recognition.

[0061] It should be understood that the aforementioned face matching verification refers to whether the face to be verified is identical or nearly identical (based on tolerance considerations) to the correct face pre-recorded in the database in terms of three-dimensional contour information. Anti-spoofing identification refers to whether the face to be verified is a real face or a forgery such as a photo, video, or silicone face mold. In addition, the light source 300 can also emit light in multiple polarization directions at different time periods, and correspondingly, multiple polarization images will be generated. During analysis, the differences between multiple polarization images can also be analyzed to obtain information about the face in the depth direction.

[0062] In some possible implementations, among the multiple second rays 182 with different polarization directions emitted by the light source 300, there is one second ray 182 with the same polarization direction as the polarization element 131.

[0063] In some possible implementations, the layer order of the first filter film 121, the second filter film 122, and the polarizing element 131 is not limited, for example... Figure 1 In this configuration, the first filter film 121 and the second filter film 122 are disposed in the same layer, and the polarizing element 131 is located on the side of the second filter film 122 that is away from the second photosensitive unit 111b; for example... Figure 2 In one example, the first filter film 121 and the second filter film 122 are disposed in the same layer, and the polarizing element 131 is located on the side of the first filter film 121 and the second filter film 122 away from the second photosensitive unit 111b; or, for another example, the first filter film 121 and the second filter film 122 are disposed in the same layer, and the polarizing element 131 is located on the side of the first filter film 121 and the second filter film 122 closer to the second photosensitive unit 111b.

[0064] When the polarizing element 131 is configured, it can be located only in the optical path of the second ray 182, or it can be located simultaneously in the optical paths of the first ray 181 and the second ray 182. Specifically:

[0065] like Figure 1 As shown, the polarization element 131 is located only on the photosensitive side of the second photosensitive unit 111b. This means that the first light ray 181 does not pass through the polarization element 131 in its path into the first photosensitive unit 111a, resulting in lower light loss and improved image brightness of the first photosensitive unit 111a. However, the second light ray 182 must pass through the polarization element 131 before entering the second photosensitive unit 111b to achieve face recognition. (Continuing to refer to...) Figure 1 A light-transmitting layer 132 with a similar or equal thickness to the polarizing element 131 is also disposed in the same layer as the polarizing element 131. The light-transmitting layer 132 and the polarizing element 131 can form a single-layer structure (polarizing layer 130), thus facilitating the subsequent formation of other layers on the polarizing layer 130 (e.g., ...). Figure 4 The optical path guiding layer 140 or protective layer 150 in the middle provides a relatively flat base.

[0066] like Figure 2 As shown, the polarization element 131 is located on the photosensitive side of the first photosensitive unit 111a and the second photosensitive unit 111b, and... Figure 1The difference lies in the fact that the first light ray 181 needs to pass through the polarization element 131 before entering the first photosensitive unit 111a. Although this will adaptively increase the light loss of the first light ray 181, the image brightness can be compensated by reasonably extending the exposure time. The polarization layer 130 is formed by a single layer of polarization element 131, which simplifies the manufacturing process, reduces the alignment requirements, and lowers the cost.

[0067] In some possible implementations, the arrangement array of photosensitive units 111 can be a matrix, a circular array, a fan-shaped array, etc.

[0068] In some possible implementations, such as Figure 3 As shown, the first photosensitive unit 111a is uniformly distributed on the photosensitive surface of the photosensitive unit array 110. This allows the first photosensitive unit 111a to be distributed over a wide range, resulting in a wider field of view.

[0069] In some possible implementations, such as Figure 3 As shown, the second photosensitive unit 111b is also arranged in an array, uniformly distributed on the photosensitive surface of the photosensitive unit array 110. This allows the second photosensitive unit 111b to be distributed over a wider range, resulting in a wider field of view.

[0070] In some possible implementations, such as Figure 3 As shown, the first photosensitive unit 111a and the second photosensitive unit 111b are both arranged in an array and are uniformly distributed on the photosensitive surface of the photosensitive unit array 110. This allows the first photosensitive unit 111a and the second photosensitive unit 111b to be distributed over a wide range, resulting in a wide field of view.

[0071] In some possible implementations, such as Figure 3 As shown, considering that the normal shooting function has higher requirements for image quality than the face recognition function, the number of first photosensitive units 111a can be greater than the number of second photosensitive units 111b. This allows the image receiver 100 to have better image quality during normal shooting, while also meeting the requirements of the face recognition function.

[0072] In some possible implementations, such as Figure 4 As shown, the image receiver 100 also includes an optical path guiding layer 140, which is located on the photosensitive side of the photosensitive unit array 110. A polarization element 131 is disposed in the optical path guiding layer, for example... Figure 4 In the optical path guiding layer 140, there are two layers, upper and lower. The polarization element 131 can be disposed between the upper and lower layers of the optical path guiding layer 140. Figure 4 The intermediate polarization element 131 is arranged throughout the entire layer. Furthermore, Figure 1The polarization layer 130, which consists of the polarization element 131 and the light-transmitting layer 132, can also be located between the upper and lower layers of the optical path guiding layer 140.

[0073] In some possible implementations, such as Figure 4 or Figure 5 As shown, the image receiver 100 also includes an optical path guiding layer 140, which is located on the photosensitive side of the photosensitive unit array 110. The optical path guiding layer 140 has light-transmitting holes 141 that correspond one-to-one with the first photosensitive unit 111a and the second photosensitive unit 111b. The light-transmitting holes 141 can act as apertures, thereby improving the imaging quality of the first photosensitive unit 111a and the second photosensitive unit 111b.

[0074] In some possible implementations, the polarizing element corresponds to the position of the light-transmitting aperture. For example, the polarizing element can be located inside the light-transmitting aperture, outside the light-transmitting aperture, or above the microlens array.

[0075] like Figure 4 As shown, the optical path guiding layer 140 is divided into upper and lower layers. Each light-transmitting hole 141 consists of a first sub-hole penetrating the upper layer and a second sub-hole penetrating the lower layer. The polarizing element 131 of the entire layer can be located between the upper and lower layers. Furthermore, Figure 4 The polarization element 131 in the middle can also be replaced with Figure 1 The polarization layer 130 in the middle.

[0076] In some possible implementations, such as Figure 4 or Figure 5 As shown, the image receiver 100 also includes a microlens array 160, which is located on the photosensitive side of the photosensitive unit array 110. The microlens array 160 can further optically shape the incident first light 181 and second light 182, thereby improving the imaging quality of the image receiver 100.

[0077] In some possible implementations, such as Figure 4 or Figure 5 As shown, the image receiver 100 also includes a light-transmitting protective layer 150, which is located between the optical path guiding layer 140 and the microlens array 160, for connecting the two.

[0078] In some possible implementations, such as Figure 4 or Figure 5 As shown, the image receiver 100 also includes a lens 170, which is located on the photosensitive side of the photosensitive unit array 110. The light incident on the image receiver 100 can be modulated through the lens 170 to improve the imaging quality of the image receiver 100.

[0079] In some possible implementations, such as Figure 5 As shown, the polarization element 131 is located on the side of the microlens array 160 away from the photosensitive unit array 110.

[0080] In some possible implementations, the polarizing element 131 is located on the surface or inside the lens 170.

[0081] In some possible implementations, such as Figure 4 or Figure 5 As shown, the photosensitive unit array 110 can be disposed on the substrate 101, and the filter layer 120 can be stacked on the photosensitive side of the photosensitive unit array 110.

[0082] When the image receiver 100 is imaging, the pixel circuit can control the photosensitive units 111 in the photosensitive unit array 110 to be turned on, so that the photosensitive units 111 in the turned-on state can receive the corresponding light. Since the image receiver 100 integrates a first photosensitive unit 111a and a second photosensitive unit 111b to realize normal shooting and face recognition functions, the pixel circuit can be configured to meet the requirements of the photosensitive units 111 sensing light and outputting electrical signals.

[0083] like Figure 6 As shown, the image receiver 100 also includes a pixel circuit, which includes a control circuit 210 and multiple signal output circuits 220.

[0084] The control circuit 210 is electrically connected to multiple photosensitive units 111 and is configured to activate the photosensitive units 111 in the photosensitive unit array 110 row by row, where activation means that the photosensitive unit 111 is in the on state. For example Figure 6 In the process, the control circuit 210 is electrically connected to all the photosensitive units 111 in the five-line photosensitive unit 111. It can control the five-line photosensitive unit 111 to be activated row by row, and the next row of photosensitive units 111 will only be activated after the previous row is turned off.

[0085] Multiple signal output circuits 220 correspond one-to-one with multiple rows of photosensitive units 111. When a row of photosensitive units 111 includes a first photosensitive unit 111a and a second photosensitive unit 111b, the signal output circuit 220 corresponding to that row of photosensitive units 111 includes a first output circuit 221 and a second output circuit 222 connected in parallel. The first photosensitive unit 111a is electrically connected to the first output circuit 221, and the second photosensitive unit 111b is electrically connected to the second output circuit 222.

[0086] for example Figure 6The circuit contains five columns of photosensitive units 111 and five signal output circuits 220. For the first column of photosensitive units 111 on the left and its corresponding signal output circuit 220: it includes three first photosensitive units 111a and two second photosensitive units 111b. The three first photosensitive units 111a are electrically connected to the first output circuit 221, and the two second photosensitive units 111b are electrically connected to the second output circuit 222. For the second column of photosensitive units 111 on the left and its corresponding signal output circuit 220: it includes five first photosensitive units 111a, all of which are electrically connected to the signal output circuit 220. The signal output circuit 220 may include one or more branches (connected in parallel). The remaining columns of photosensitive units 111 can be configured similarly.

[0087] In this way, when the first photosensitive unit 111a and the second photosensitive unit 111b in the same column are activated and output electrical signals, they can output signals to the outside through their respective dedicated output circuits, which can reduce the signal interference problem between the two.

[0088] To ensure the quality of the final electrical signal output by the pixel circuit meets requirements, the pixel circuit also includes a pixel processing circuit. This pixel processing circuit processes the electrical signal output by the signal output circuit 220, thereby improving the signal quality. For ease of understanding, two pixel processing circuits and their corresponding control circuit 210 are shown below with reference to the accompanying drawings:

[0089] Example 1

[0090] Please refer to Figure 7 The pixel circuit also includes multiple pixel processing circuits, each of which corresponds to a signal output circuit 220. Each pixel processing circuit is connected to a corresponding signal output circuit 220.

[0091] When a signal output circuit 220 includes a first output circuit 221 and a second output circuit 222, the pixel processing circuit corresponding to the signal output circuit 220 includes a first processing circuit 231 and a second processing circuit 232 connected in parallel. The first output circuit 221 is electrically connected to the first processing circuit 231, and the second output circuit 222 is electrically connected to the second processing circuit 232. In this way, the electrical signal output by the first photosensitive unit 111a through the first output circuit 221 can be processed by the first processing circuit 231, and the electrical signal output by the second photosensitive unit 111b through the second output circuit 222 can be processed by the second processing circuit 232. This allows the electrical signals output by the first photosensitive unit 111a and the second photosensitive unit 111b to be processed by different processing circuits, which helps to reduce interference between them.

[0092] for example Figure 7 The circuit contains five columns of photosensitive units 111, as well as five signal output circuits 220 and five pixel processing circuits. For the first column of photosensitive units 111 on the left, and its corresponding signal output circuits 220 and pixel processing circuits: it includes three first photosensitive units 111a and two second photosensitive units 111b. The three first photosensitive units 111a output electrical signals to the first processing circuit 231 via the first output circuit 221, and the two second photosensitive units 111b output electrical signals to the second processing circuit 231 via the second output circuit 222. For the second column of photosensitive units 111 on the left, and its corresponding signal output circuits 220 and pixel processing circuits: it includes five first photosensitive units 111a. The five first photosensitive units 111a output electrical signals to the pixel processing circuits via the signal output circuits 220. The pixel processing circuits may include one or more branches (connected in parallel), and their number should be the same as the number of branches in the signal output circuits 220, and they should be connected one-to-one. The remaining photosensitive units 111 can be configured similarly.

[0093] The control circuit 210 in Example 1 can be configured in at least the following two ways:

[0094] One of them: Please continue to refer to Figure 7The control circuit 210 includes multiple row control circuits 210. Each row control circuit 210 corresponds one-to-one with a row of photosensitive units 111, and each row control circuit 210 is electrically connected to a row of photosensitive units 111. When a row of photosensitive units 111 includes a first photosensitive unit 111a and a second photosensitive unit 111b, the row control circuit 210 corresponding to that row of photosensitive units 111 includes an independent first row selection switch circuit 211 and a second row selection switch circuit 212. The first photosensitive unit 111a is electrically connected to the first row selection switch circuit 211, and the second photosensitive unit 111b is electrically connected to the second row selection switch circuit 212. This allows the first photosensitive unit 111a and the second photosensitive unit 111b in the same row to be activated simultaneously or in a time-division manner. For example, when the first photosensitive unit 111a and the second photosensitive unit 111b are activated simultaneously, the electrical signal output by the first photosensitive unit 111a can be used for normal shooting, while the electrical signal output by the second photosensitive unit 111b can be used for face recognition. It should be understood that the image captured by the first photosensitive unit 111a can also participate in the face recognition function, thus obtaining more facial information and helping to improve the accuracy of face recognition. Furthermore, when the first photosensitive unit 111a is activated and the second photosensitive unit 111b is not activated, the electrical signal output by the first photosensitive unit 111a can be used for normal shooting, while when the first photosensitive unit 111a is not activated and the second photosensitive unit 111b is activated, the electrical signal output by the second photosensitive unit 111b can be used for face recognition.

[0095] for example Figure 7 The system contains five rows of photosensitive units 111 and five row control circuits 210. For the topmost first row of photosensitive units 111 and its corresponding row control circuit 210: it includes five first photosensitive units 111a and three second photosensitive units 111b. The five first photosensitive units 111a are electrically connected to the first row selection switch circuit 211, and the three second photosensitive units 111b are electrically connected to the second row selection switch circuit 212. For the second row of photosensitive units 111 below it and its corresponding row control circuit 210: it includes five first photosensitive units 111a, all of which are electrically connected to the row control circuit 210. The row control circuit 210 may include one or more branches (connected in parallel). The remaining photosensitive units 111 in the other columns can be configured similarly.

[0096] It should be understood that the activation periods of any two row control circuits 210 do not overlap, so as to achieve the purpose of activating row by row.

[0097] In the same row control circuit 210, when the activation period of the first row selection switch circuit 211 includes the activation period of the second row selection switch circuit 212, it means that the first photosensitive unit 111a and the second photosensitive unit 111b in the same row may be activated simultaneously. For example, please refer to... Figure 10 The light source 300 includes a first light-emitting element and a second light-emitting element that emit light rays with different polarization directions (both belonging to the second light ray 182). Therefore, the first photosensitive unit 111a and the second photosensitive unit 111b are activated simultaneously during the time period t1 to t4. At this time, the first photosensitive unit 111a can capture an image during the time period t1 to t4. The first light-emitting element is lit during the time period t1 to t2, so the second photosensitive unit 111b is also activated during the time period t1 to t2 to complete the acquisition of the first polarized image, and then turns off. The second light-emitting element is lit during the time period t3 to t4, so the second photosensitive unit 111b is also activated during the time period t3 to t4 to complete the acquisition of the second polarized image. By comparing the two polarized images, depth information can be obtained. During this process, the image acquired by the first photosensitive unit 111a can be used for face recognition.

[0098] In the same row control circuit 210, when the activation periods of the first row selection switch circuit 211 and the second row selection switch circuit 212 do not overlap, it means that the first photosensitive unit 111a and the second photosensitive unit 111b in the same row will not be activated simultaneously. For example, refer to... Figure 11 As shown, the light source 300 includes a first light-emitting element and a second light-emitting element that emit light rays with different polarization directions (all belonging to the second light ray 182). Therefore, the first photosensitive unit 111a and the second photosensitive unit 111b are activated simultaneously during the time period t1 to t4. At this time, the first photosensitive unit 111a can capture an image during the time period t1 to t4. The first light-emitting element is lit during the time period t5 to t6, so the second photosensitive unit 111b is also activated during the time period t5 to t6 to complete the acquisition of the first polarized image, and then it is turned off. The second light-emitting element is lit during the time period t7 to t8, so the second photosensitive unit 111b is also activated during the time period t7 to t8 to complete the acquisition of the second polarized image. By comparing the two polarized images, depth information can be obtained. During this process, the image acquired by the first photosensitive unit 111a can be used for face recognition.

[0099] Another one: Please refer to Figure 8 The control circuit 210 includes multiple line control circuits 210. Each line control circuit 210 corresponds one-to-one with a line of photosensitive units 111, and each line control circuit 210 is electrically connected to one line of photosensitive units 111. Figure 7The difference in the control circuit 210 is that when a row of photosensitive units 111 includes a first photosensitive unit 111a and a second photosensitive unit 111b, the row control circuit 210 is no longer divided into an independent first row gating switch circuit 211 and a second row gating switch circuit 212. Instead, the first photosensitive unit 111a and the second photosensitive unit 111b in the same row are electrically connected to the same row gating switch circuit (called the third row gating switch circuit 213). Its disadvantage is that it cannot achieve time-division activation of the first photosensitive unit 111a and the second photosensitive unit 111b; they can only be activated simultaneously.

[0100] Example 2

[0101] Please refer to Figure 9 The pixel circuit also includes multiple third processing circuits 233, which are connected one-to-one with multiple signal output circuits 220.

[0102] like Figure 9 As shown, when a signal output circuit 220 includes a first output circuit 221 and a second output circuit 222, the first output circuit 221 and the second output circuit 222 of the signal output circuit 220 are connected in parallel and then connected in series with the corresponding third processing circuit 233. Furthermore, the on / off states of the first output circuit 221 and the second output circuit 222 are mutually exclusive. That is, although the first output circuit 221 and the second output circuit 222 are connected to the same third processing circuit 233, the electrical signals output by the first output circuit 221 and the second output circuit 222 will not arrive at the third processing circuit 233 simultaneously by means of the first output circuit 221 being on and the second output circuit 222 being off, or the first output circuit 221 being off and the second output circuit 222 being on again. This avoids mutual interference between the two.

[0103] When the on / off states of the first output circuit 221 and the second output circuit 222 are mutually exclusive, such as Figure 9 As shown, a first selection switch 241 can be set on the first output circuit 221, and a second selection switch 242 can be set on the second output circuit 222. By controlling the on and off states of the first selection switch 241 and the second selection switch 242 to be different in the same time period, the on and off states of the first output circuit 221 and the second output circuit 222 can be mutually exclusive.

[0104] like Figure 9 As shown, the control circuit 210 includes multiple third row gating switch circuits 213. Each of the multiple third row gating switch circuits 213 corresponds to and is electrically connected to a multiple row photosensitive unit 111. The activation periods of any two third row gating switch circuits 213 do not overlap, thereby enabling the multiple row photosensitive units 111 to be activated row by row.

[0105] Another aspect of the embodiments of this application provides an electronic device, such as... Figure 12 As shown, the device includes a main body 400 and an image receiver 100 of any of the above types, with the image receiver 100 disposed on the main body 400.

[0106] The electronic device also includes a light source, which is also located on the main body of the device. The light emitted by the light source is reflected by the target object, carrying polarization information corresponding to the contour surface of the target object, and then enters the image receiver. The light source 300 may include multiple light-emitting elements, such as at least two (the first light-emitting element and the second light-emitting element mentioned above). When there are multiple light-emitting elements, they can be integrated into one unit as a single light source or set up separately.

[0107] The main body of the device 400 includes a display screen 420, which comprises a display module and a light-transmitting cover. The display module refers to an electronic module capable of displaying images, and it typically has two opposing surfaces, one of which serves as the display side, while the opposite surface serves as the non-display side. The light-transmitting cover is mainly attached to the display side of the display module, and its material is usually glass (suitable for rigid screens) or a light-transmitting flexible material (suitable for flexible screens) to protect the display side of the display module.

[0108] To achieve normal shooting and face recognition functions while increasing the screen-to-body ratio, the display module has a light channel extending from the display side to the non-display side (i.e., the cutout or window portion in the display screen 420). The light source 300 and image receiver 100 are both located on the non-display side of the display module, and the light source 300 and image receiver 100 correspond to the openings of the light channel on the non-display side. Thus, when performing face recognition, the second light ray 182 emitted by the light source 300 can smoothly pass through the light channel from the light-transmitting cover to the target object, and then, after being reflected by the target object, can smoothly pass through the light-transmitting cover and the light channel to enter the image receiver 100. Similarly, when performing normal shooting, ambient light can smoothly pass through the light-transmitting cover and the light channel to enter the image receiver 100. It should be understood that the number of light channels can be one or more; for example, the light source 300 and image receiver 100 can share the same light channel, or each can have its own light channel.

[0109] The aforementioned electronic devices may specifically include mobile phones, tablets, televisions, laptops, smart home devices (such as smart air conditioners, smart refrigerators, smart speakers, smart lights or smart curtains, etc.), wearable electronic devices, in-vehicle devices (also known as vehicle infotainment systems), virtual reality devices, etc., and this application does not impose any restrictions on them.

[0110] For example Figure 12The diagram illustrates a mobile phone comprising a main body 400, an image receiver 100, and a light source 300. The main body 400 includes a back panel, a mid-frame 410, a motherboard, a battery, and a display screen 420. The back panel and the display screen 420 are respectively mounted on opposite sides of the mid-frame 410 to enclose an internal space. The image receiver 100, the light source 300, the motherboard, and the battery can be located within this internal space, specifically, the image receiver 100 is positioned below the display screen 420. The battery powers the motherboard, the image acquisition device, and the display screen 420. The display screen 420 has a cutout portion, and the cutout position is aligned with the positions of the image receiver 100 and the light source 300.

[0111] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0112] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0113] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0114] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0115] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. An image receiver, characterized in that, It includes a photosensitive unit array, and a first filter film and a second filter film are disposed on the photosensitive side of the photosensitive unit array; The photosensitive unit array includes multiple photosensitive units distributed in an array. The multiple photosensitive units are divided into several first photosensitive units and several second photosensitive units. The first filter film is located on the photosensitive side of the first photosensitive unit. The bandpass of the first filter film includes the visible light band. The second filter film is located on the photosensitive side of the second photosensitive unit. The bandpass of the second filter film is the target band, which is in the infrared band. A polarization element is provided at least on the photosensitive side of the second photosensitive unit, which is used to receive light carrying polarization information, the polarization information corresponding to the contour surface of the target object.

2. The image receiver as described in claim 1, characterized in that, The polarization element is also located on the photosensitive side of the first photosensitive unit.

3. The image receiver as described in claim 1, characterized in that, The first filter film and the second filter film are disposed in the same layer.

4. The image receiver as described in claim 1, characterized in that, The second photosensitive unit is uniformly distributed on the photosensitive surface of the photosensitive unit array.

5. The image receiver as claimed in claim 1, characterized in that, The number of the first photosensitive units is greater than the number of the second photosensitive units.

6. The image receiver as claimed in any one of claims 1 to 5, characterized in that, The image receiver further includes an optical path guiding layer located on the photosensitive side of the photosensitive unit array, and the polarization element is disposed in the optical path guiding layer; Alternatively, the image receiver may further include a microlens array located on the photosensitive side of the photosensitive unit array, with the polarizing element located on the side of the microlens array opposite to the photosensitive unit array; Alternatively, the image receiver may further include a lens located on the photosensitive side of the photosensitive unit array, with the polarizing element located on the surface or inside the lens.

7. The image receiver as claimed in claim 6, characterized in that, The image receiver further includes an optical path guiding layer, on which light-transmitting holes are respectively opened, corresponding to the first photosensitive unit and the second photosensitive unit, and the polarizing element is positioned corresponding to the light-transmitting hole.

8. The image receiver as claimed in any one of claims 1 to 5, characterized in that, The image receiver also includes a pixel circuit, which includes a control circuit and multiple signal output circuits. The control circuit is electrically connected to the plurality of photosensitive units respectively, and is configured to activate the photosensitive units in the photosensitive unit array row by row; Each of the multiple signal output circuits corresponds one-to-one with a multiple column of photosensitive units. When a column of photosensitive units includes the first photosensitive unit and the second photosensitive unit, the signal output circuit corresponding to that column of photosensitive units includes a first output circuit and a second output circuit connected in parallel. The first photosensitive unit is electrically connected to the first output circuit, and the second photosensitive unit is electrically connected to the second output circuit.

9. The image receiver as claimed in claim 8, characterized in that, The pixel circuit also includes multiple pixel processing circuits, and each of the multiple pixel processing circuits corresponds one-to-one with a multiple signal output circuit; When a signal output circuit includes a first output circuit and a second output circuit, the pixel processing circuit corresponding to the signal output circuit includes a first processing circuit and a second processing circuit connected in parallel. The first output circuit is electrically connected to the first processing circuit, and the second output circuit is electrically connected to the second processing circuit.

10. The image receiver as claimed in claim 9, characterized in that, The control circuit includes multiple row control circuits; Each row control circuit corresponds one-to-one with a row of photosensitive units. When a row of photosensitive units includes a first photosensitive unit and a second photosensitive unit, the row control circuit corresponding to the row of photosensitive units includes an independent first row gating switch circuit and a second row gating switch circuit. The first photosensitive unit is electrically connected to the first row gating switch circuit, and the second photosensitive unit is electrically connected to the second row gating switch circuit. The activation periods of any two of the aforementioned row control circuits do not overlap; In the same row control circuit, the activation period of the first row gating switch circuit includes the activation period of the second row gating switch circuit, or the activation periods of the first row gating switch circuit and the second row gating switch circuit do not overlap.

11. The image receiver as claimed in claim 8, characterized in that, The pixel circuit also includes multiple third processing circuits, each of which corresponds one-to-one with a multiple signal output circuit. When a signal output circuit includes a first output circuit and a second output circuit, the first output circuit and the second output circuit of the signal output circuit are electrically connected to the corresponding third processing circuit, respectively; the on / off states of the first output circuit and the second output circuit are mutually exclusive.

12. The image receiver as claimed in claim 9 or 11, characterized in that, The control circuit includes multiple third-row gating switch circuits, each of which corresponds to and is electrically connected to one of the multiple rows of photosensitive units. The activation periods of any two third-row gating switch circuits do not overlap.

13. An electronic device, characterized in that, The device includes a main body, a light source, and an image receiver as described in any one of claims 1 to 12. The light source and the image receiver are disposed on the main body of the device. The light emitted by the light source is reflected by the target object and carries polarization information corresponding to the contour surface of the target object, and is incident on the image receiver.

Images