Display module and electronic device
By setting a photosensitive layer in the light-transmitting area of the display module, the functions of an ambient light sensor, a distance sensor, and a biosensor are realized, solving the problem of large sensor space occupation and promoting the miniaturization of electronic devices.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- VIVO MOBILE COMM CO LTD
- Filing Date
- 2022-10-27
- Publication Date
- 2026-06-26
AI Technical Summary
In existing technologies, sensors in electronic devices occupy a large space, resulting in a reduced screen-to-body ratio and hindering device miniaturization.
A photosensitive layer is set in the light-transmitting area of the display module. The photosensitive layer can sense ambient light and realize the function of an ambient light sensor. When infrared light or visible light is applied, it can perform distance detection and biometric image recognition, replacing independent sensors and reducing the number of sensors.
By integrating a photosensitive layer to create a multifunctional sensor, the number of sensors in electronic devices is reduced, the space occupied is decreased, and the miniaturization of devices is facilitated.
Smart Images
Figure CN115631691B_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of display technology, specifically relating to a display module and electronic device. Background Technology
[0002] As electronic device display technology continues to develop, people are not only pursuing high screen-to-body ratios, but also increasingly demanding biometric health identification.
[0003] In related technologies, electronic devices are equipped with devices such as biosensors, distance sensors, and ambient light sensors. These sensors are independently configured and located below the display screen, with the display screen providing their corresponding functions. Therefore, these components inevitably occupy the display area, resulting in a reduced screen-to-body ratio. Furthermore, these sensor components occupy internal space within the electronic device, leading to a significant space requirement and hindering the miniaturization of electronic devices. Summary of the Invention
[0004] The purpose of this application is to provide a display module and electronic device that can solve the problem of large space occupation by sensors in related technologies.
[0005] In a first aspect, embodiments of this application provide a display module, including a substrate and a thin-film transistor, an anode, a cathode, and a photosensitive layer disposed on the substrate. The anode is connected to the thin-film transistor, the display module has a light-transmitting area, the photosensitive layer is located within the light-transmitting area, and the photosensitive layer is disposed between the anode and the cathode.
[0006] Secondly, embodiments of this application also provide an electronic device, including an optical device and the aforementioned display module, wherein the optical device is disposed opposite to the light-transmitting area.
[0007] In this embodiment, by setting a photosensitive layer in the light-transmitting area of the display module, the photosensitive layer can sense ambient light to perform ambient light detection, thus realizing the function of an ambient light sensor; it can also perform distance detection when infrared light is applied, thus realizing the function of a distance sensor; or it can perform bio-image recognition when infrared or visible light is applied, thus realizing the function of a biosensor. Therefore, by setting a photosensitive layer, the light-transmitting area of the display module can have the function of at least one of the following sensors: ambient light sensor, distance sensor, and biosensor. This eliminates the need for separate sensors, reducing the number of sensors in the electronic device and thus reducing the space occupied by sensor components, which is beneficial for the miniaturization of electronic devices. Attached Figure Description
[0008] Figure 1 This is a cross-sectional view of the display module disclosed in the embodiments of this application;
[0009] Figure 2 This is a cross-sectional schematic diagram of the photosensitive layer, cathode, and anode disclosed in the embodiments of this application;
[0010] Figure 3 This is a schematic diagram of the first pixel unit or the second pixel unit disclosed in the embodiments of this application;
[0011] Figure 4 This is a schematic diagram of the light-transmitting area disclosed in an embodiment of this application;
[0012] Figure 5 This is a schematic diagram of the light-transmitting area disclosed in another embodiment of this application;
[0013] Figure 6 This is a schematic diagram of the electronic device disclosed in the embodiments of this application.
[0014] Explanation of reference numerals in the attached figures:
[0015] 100-Substrate,
[0016] 200 - Thin-film transistor, 210 - Active layer, 220 - Source, 230 - Drain, 240 - Gate
[0017] 300-Anode,
[0018] 400-Cathode,
[0019] 500 - Photosensitive layer, 511 - Hole transport layer, 512 - Active layer, 513 - Electron transport layer, 501 - Photosensitive unit
[0020] 600 - Light-transmitting area, 610 - First photosensitive area, 611 - First pixel unit, 620 - Second photosensitive area, 621 - Second pixel unit.
[0021] 700 - Display Area
[0022] 810 - Buffer layer, 820 - Passivation layer, 830 - Insulating layer, 840 - Dielectric layer. Detailed Implementation
[0023] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.
[0024] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0025] The display module and electronic device provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.
[0026] Please refer to Figures 1-5 This application discloses a display module that can be applied to electronic devices with optical components. The display module disclosed in this application includes a substrate 100 and thin-film transistors 200, an anode 300, a cathode 400, and a photosensitive layer 500 disposed on the substrate 100. The substrate 100 can serve as the basis for other structures included in the display module. In one optional embodiment, the display module can be a rigid screen structure, in which case the substrate 100 may include a glass layer; that is, the substrate 100 can be made of glass, which has high transmittance, thereby improving the transmittance of the light-transmitting area 600. In another optional embodiment, the display module can be a flexible screen structure, in which case the substrate 100 can be a flexible substrate. Furthermore, when the display module is a liquid crystal display module, it may also include a liquid crystal layer, a color filter film, or other structures for display purposes; when the display module is an organic light-emitting display module, it may also include an organic light-emitting layer or other structures for display purposes.
[0027] like Figure 1As shown, the anode 300 is connected to the thin-film transistor 200. The display module has a light-transmitting area 600, and a photosensitive layer 500 is located within the light-transmitting area 600, positioned between the anode 300 and the cathode 400. Thus, the thin-film transistor 200 can drive the photosensitive layer 500, which is used to sense light and convert the light signal into an electrical signal. This electrical signal can be further processed to achieve the detection purpose. Optionally, the thin-film transistor 200 can be LTPS (Low Temperature Poly-Silicon), the anode 300 and cathode 400 can both be formed of indium tin oxide, and the photosensitive layer 500 can be made of an organic photosensitive material. The thin-film transistors 200, anode 300, and cathode 400 here can be the structures originally used to implement display driving in the display module. That is, the thin-film transistors 200, anode 300, and cathode 400 in the light-transmitting area 600 can be set in the same layer as the thin-film transistors 200, anode 300, and cathode 400 in other areas, thereby simplifying the manufacturing process of the display module.
[0028] In the embodiments of this application, a photosensitive layer 500 is provided in the light-transmitting area 600 of the display module. The photosensitive layer 500 can be used to sense ambient light for ambient light detection, thus realizing the function of an ambient light sensor; it can also be used to detect distance when infrared light is applied, thus realizing the function of a distance sensor; or it can be used to perform bio-image recognition when infrared or visible light is applied, thus realizing the function of a biosensor. The information detected by the photosensitive layer 500 is further processed by the thin-film transistor 200. Therefore, by providing the photosensitive layer 500, the light-transmitting area 600 of the display module can have the function of at least one of the following sensors: ambient light sensor, distance sensor, and biosensor. This eliminates the need for separate sensors, reducing the number of sensors in the electronic device and thus reducing the space occupied by sensor components, which is beneficial for the miniaturization of electronic devices.
[0029] In one optional embodiment, the photosensitive layer 500 includes an active layer 512, which absorbs photons and excites photogenerated carriers. The carriers include electrons and holes. Since the movement of electrons and holes is random, they easily recombine during movement. The recombination of these electrons and holes leads to a decrease in photocurrent and a reduction in photoelectric conversion efficiency.
[0030] In another embodiment, the photosensitive layer 500 includes a hole transport layer 511, an active layer 512, and an electron transport layer 513 sequentially disposed. The hole transport layer 511 is connected to the anode 300, and the electron transport layer 513 is connected to the cathode 400. The electron transport layer 513 transports electrons separated from the charge carriers to the cathode 400. The hole transport layer 511 blocks electrons, enhances hole transport, and prevents the active layer 512 from directly contacting the anode 300, thus preventing quenching. The hole transport layer 511 transports holes separated from the charge carriers to the anode 300. The electron transport layer 513 enhances electron transport and similarly prevents the active layer 512 from directly contacting the cathode 400. With this configuration, electrons and holes are transported in their respective transport layers, allowing them to be collected on their corresponding electrodes. This significantly reduces the probability of charge carriers recombinizing before reaching their respective electrodes, thereby increasing the photocurrent and improving the photoelectric conversion efficiency.
[0031] In this embodiment, as Figure 1 As shown, the thin-film transistor 200 includes an active layer 210, a source 220, a drain 230, and a gate 240. The active layer 210 can be polysilicon and can be disposed on the substrate 100 through a passivation layer 820. The source 220 and drain 230 are disposed on the same layer, and the active layer 210 is connected to the source 220 and drain 230 respectively. The source 220 is connected to the anode 300. Moreover, when the substrate 100 includes a glass layer, a buffer layer 810 is disposed between the passivation layer 820 and the substrate 100 to prevent metal ions from diffusing from the glass to the active layer 210. Optionally, the display module further includes an insulating layer 830 and a dielectric layer 840. The insulating layer 830 is disposed adjacent to the passivation layer 820, and the dielectric layer 840 is disposed adjacent to the insulating layer 830. The active layer 210 is disposed within the insulating layer 830, and the gate 240 is disposed within the dielectric layer 840. The insulating layer 830 is used to insulate the gate 240, and the dielectric layer 840 is used to provide insulation protection for the source 220 and the drain 230.
[0032] In one optional embodiment, the photosensitive layer 500 includes only one photosensitive unit 501, with the thin-film transistor 200, anode 300, and photosensitive unit 501 corresponding one-to-one. Thus, the photosensitive unit 501 has a photosensitive effect and can detect ambient light without a light source, realizing the function of ambient light detection. However, since the area of the photosensitive unit 501 is large, for example, the maximum size of the photosensitive unit 501 is larger than the size between the valleys and ridges of the fingerprint, the photosensitive unit 501 cannot recognize fingerprint information. Therefore, even when a light source is applied, the light-transmitting area 600 cannot perform fingerprint recognition, that is, it is difficult to realize biometric recognition, which is not conducive to the expansion of the function of the light-transmitting area 600.
[0033] In another embodiment, such as Figure 4As shown, the photosensitive layer 500 includes multiple photosensitive units 501, and multiple thin-film transistors 200 and anodes 300. Each thin-film transistor 200, anode 300, and photosensitive unit 501 correspond one-to-one. Each thin-film transistor 200 drives its corresponding photosensitive unit 501 through its corresponding anode 300, enabling each photosensitive unit 501 to perform its corresponding function. Optionally, the photosensitive units 501 can be connected together or set individually. Thus, even when no light source is loaded in the light-transmitting area 600, the photosensitive unit 501 can still detect ambient light. Because the photosensitive layer 500 is divided into multiple photosensitive units 501, compared to a scheme where the photosensitive layer 500 includes only one photosensitive unit 501, the size of the photosensitive unit 501 is reduced, which is beneficial for the photosensitive unit 501 to perform biometric identification, such as fingerprint recognition. Therefore, even when a light source is loaded in the light-transmitting area 600, biometric functions such as fingerprint recognition can be realized, which is beneficial for expanding other functions of the light-transmitting area 600.
[0034] In one alternative embodiment, such as Figure 5 As shown, the light-transmitting area 600 includes a first photosensitive area 610 and a second photosensitive area 620 arranged adjacent to each other. The first photosensitive area 610 contains a plurality of first pixel units 611, and the second photosensitive area 620 contains a plurality of second pixel units 621. Each first pixel unit 611 and each second pixel unit 621 includes a photosensitive unit 501. The area of the photosensitive unit 501 in the first pixel unit 611 is proportional to the total area of the first pixel unit 611 as a first ratio, and the area of the photosensitive unit 501 in the second pixel unit 621 is proportional to the total area of the second pixel unit 621 as a second ratio. Specifically, the total area of the first pixel unit 611 is equal to the total area of the second pixel unit 621, and / or, the first ratio is equal to the second ratio. Thus, through the first photosensitive area 610 and the second photosensitive area 620, the light-transmitting area 600 can perform different functions. For example, when visible light is applied to the first photosensitive area 610, the first photosensitive area 610 performs fingerprint recognition; when infrared light is applied to the second photosensitive area 620, the second photosensitive area 620 performs distance detection. However, the wavelength ranges of visible light and infrared light are different. If pixel units of the same area and / or pixel units of the same proportion, i.e., the full-well capacity is the same, the full-well capacity of the photosensitive area will not match the wavelength range of the applied light, resulting in low functional recognition accuracy and reduced detection accuracy.
[0035] Therefore, in another embodiment, the first pixel unit 611 and the second pixel unit 621 satisfy at least one preset condition. This preset condition may include the total area of the first pixel unit 611 being greater than or less than the total area of the second pixel unit 621, and a first ratio being greater than or less than a second ratio. In other words, the first pixel unit 611 and the second pixel unit 621 satisfy at least one of the following two preset conditions: the total area of the first pixel unit 611 is not equal to the total area of the second pixel unit 621, and the first ratio is not equal to the second ratio. Specifically, the larger the total area of the first pixel unit 611 and the second pixel unit 621, the lower the density of the first photosensitive area 610 and the second photosensitive area 620; conversely, the smaller the total area of the first pixel unit 611 and the second pixel unit 621, the higher the density of the first photosensitive area 610 and the second photosensitive area 620. In this way, by using pixel units of different areas and / or photosensitive units 501 occupying different proportions of pixel units, different wavelength ranges of light can be matched respectively, making the pixel units more compatible with the wavelength range of the loaded light, which is beneficial to improving the accuracy of function recognition and the accuracy of detection.
[0036] Optionally, when no light source is applied to the first photosensitive area 610, the first pixel unit 611 detects ambient light; when a light source is applied to the second photosensitive area 620, the second pixel unit 621 performs biometric identification. Specifically, when visible light is applied to the second photosensitive area 620, the second pixel unit 621 performs fingerprint recognition; when infrared light is applied to the second photosensitive area 620, the second pixel unit 621 performs vein recognition.
[0037] In one optional embodiment, when the photosensitive layer 500 is used to detect ambient light and the display module is at a first ambient brightness level, the first pixel unit 611 is energized and the second pixel unit 621 is de-energized; when the photosensitive layer 500 is used to detect ambient light and the display module is at a second ambient brightness level, the first pixel unit 611 is de-energized and the second pixel unit 621 is energized. Optionally, the energization and de-energization of the first pixel unit 611 and the second pixel unit 621 are controlled by the energization and de-energization of their respective thin-film transistors 200. The first ambient brightness is greater than the second ambient brightness; that is, the first pixel unit 611 is energized under strong light conditions and the second pixel unit 621 is energized under weak light conditions.
[0038] Furthermore, the total area of the first pixel unit 611 is equal to or less than the total area of the second pixel unit 621, and / or, the first ratio is equal to or less than the second ratio. Optionally, the first ambient brightness and the second ambient brightness can each be a fixed brightness value, or they can be a brightness range. In this case, the first ambient brightness being greater than the second ambient brightness means that the lowest value of the first ambient brightness range is greater than the highest value of the second ambient brightness range. Thus, using the first pixel unit 611, which has a smaller total area and / or a smaller proportion of photosensitive unit 501, to adapt to strong light conditions cannot meet the requirement of a larger full-well capacity; similarly, using the second pixel unit 621, which has a larger total area and / or a larger proportion of photosensitive unit 501, to adapt to weak light conditions cannot meet the requirement of a smaller full-well capacity, resulting in poor accuracy of ambient light detection.
[0039] Therefore, in another embodiment, the first pixel unit 611 and the second pixel unit 621 satisfy at least one preset condition. This preset condition may include the total area of the first pixel unit 611 being greater than the total area of the second pixel unit 621 and a first ratio being greater than a second ratio. In other words, the first pixel unit 611 and the second pixel unit 621 satisfy at least one of these two preset conditions: the total area of the first pixel unit 611 being greater than the total area of the second pixel unit 621 and the first ratio being greater than the second ratio. Thus, utilizing the first pixel unit 611, which has a larger total area and / or a larger proportion of the photosensitive unit 501, adapts to strong light conditions and meets the requirement of a larger full-well capacity. Similarly, utilizing the second pixel unit 621, which has a smaller total area and / or a smaller proportion of the photosensitive unit 501, adapts to weak light conditions and meets the requirement of a smaller full-well capacity, which is beneficial for improving the accuracy of ambient light detection.
[0040] Optionally, the light-transmitting area 600 may include three photosensitive areas, two of which are used to detect ambient light under strong light conditions and weak light conditions, respectively, and the other photosensitive area is used for distance detection or biometric identification.
[0041] In one optional embodiment, when the photosensitive layer 500 is used for biometric identification and infrared light is applied to the light-transmitting area 600, the first pixel unit 611 is energized and the second pixel unit 621 is de-energized; when the photosensitive layer 500 is used for biometric identification and visible light is applied to the light-transmitting area 600, the first pixel unit 611 is de-energized and the second pixel unit 621 is energized. Optionally, the energization and de-energization of the first pixel unit 611 and the second pixel unit 621 are controlled by the energization and de-energization of their respective thin-film transistors 200. Specifically, the wavelength range of infrared light is typically greater than 720nm, while the wavelength range of visible light is 400nm-720nm. Therefore, the wavelength of infrared light is greater than that of visible light. To ensure the accuracy of biometric identification, the full-well capacity of the first pixel unit 611 is adapted to the wavelength of infrared light, and the full-well capacity of the second pixel unit 621 is adapted to the wavelength of visible light. That is, the full-well capacity of the first pixel unit 611 is larger, and the full-well capacity of the second pixel unit 621 is smaller. However, the total area of the first pixel unit 611 is less than or equal to the total area of the second pixel unit 621, and / or the first ratio is less than or equal to the second ratio. That is, the full-well capacity of the first pixel unit 611 is smaller, and the full-well capacity of the second pixel unit 621 is larger, which leads to a decrease in the accuracy of biometric identification.
[0042] In another embodiment, the first pixel unit 611 and the second pixel unit 621 satisfy at least one preset condition. This preset condition may include the total area of the first pixel unit 611 being greater than the total area of the second pixel unit 621 and a first ratio being greater than a second ratio. In other words, the first pixel unit 611 and the second pixel unit 621 satisfy at least one of the two preset conditions: the total area of the first pixel unit 611 being greater than the total area of the second pixel unit 621 and the first ratio being greater than the second ratio. That is, the full-well capacity of the first pixel unit 611 is larger, and the full-well capacity of the second pixel unit 621 is smaller. Thus, the full-well capacity of the first pixel unit 611 can be adapted to the wavelength of infrared light, and the full-well capacity of the second pixel unit 621 can be adapted to the wavelength range of visible light, which is beneficial for improving the accuracy of biometric identification.
[0043] Optionally, the light-transmitting area 600 may include four photosensitive areas, two of which are used to detect ambient light under strong light and weak light conditions, respectively, and the other two photosensitive areas are used for biometric identification. Specifically, among the two photosensitive areas used for biometric identification, one photosensitive area is used for vein recognition under infrared light conditions, and the other photosensitive area is used for fingerprint recognition under visible light conditions.
[0044] In an optional embodiment, when the display module is in a first operating state, the first pixel unit 611 is energized and the second pixel unit 621 is de-energized; when the display module is in a second operating state, the first pixel unit 611 is de-energized and the second pixel unit 621 is energized. The first and second operating states represent at least two of the following states: the photosensitive layer 500 detects ambient light; the photosensitive layer 500 performs distance detection; and the photosensitive layer 500 performs biometric identification. Optionally, the energization and de-energization of the first pixel unit 611 are controlled by the energization and de-energization of the corresponding thin-film transistor 200. To achieve different functions for the first pixel unit 611 and the second pixel unit 621, the driving voltages of the first pixel unit 611 and the second pixel unit 621 can be different, the types of applied light sources can be different, or other differences can exist. In short, dividing the photosensitive layer 500 and the light-transmitting area 600 into different regions allows each region to perform different functions, which is beneficial for expanding the functions of the photosensitive layer 500. At the same time, the photosensitive layer 500 has the functions of at least two of the following sensors: ambient light sensor, distance sensor, and biometric sensor. The number of sensor components set in the electronic device is further reduced, and the space occupied by the electronic device is also further reduced, which is conducive to the miniaturization of electronic devices.
[0045] In an optional embodiment, when the photosensitive layer 500 is used for biometric identification, the first pixel unit 611 is energized and the second pixel unit 621 is de-energized. The first pixel unit 611 has a square structure with a side length of 30µm-80µm. Optionally, when infrared light is applied to the first photosensitive area 610, the first pixel unit 611 is energized and the second pixel unit 621 is de-energized for vein recognition; when visible light is applied to the first photosensitive area 610, the first pixel unit 611 is energized and the second pixel unit 621 is de-energized for fingerprint recognition. Thus, the side length of the first pixel unit 611 satisfies the above conditions, and the full-well capacity of the first photosensitive area 610 reaches a suitable range, thereby matching the wavelength range of light required for biometric identification and improving the accuracy of biometric identification.
[0046] In this application, the display module further includes a display area 700, which surrounds the light-transmitting area 600. The display module also includes an organic light-emitting layer (OLED), located within the display area 700 and disposed between the anode 300 and the cathode 400. The OLED and the photosensitive layer 500 are co-layered. Specifically, the OLED may include a hole transport layer 511, an electron transport layer 513, and an electroluminescent layer, wherein the electroluminescent layer can convert electrical signals into light signals. In practical applications, an electric field can be formed between the anode 300 and the cathode 400, and the OLED can emit light under the influence of this electric field. Thus, the display function of the display area 700 is achieved using the OLED, and the display area 700 is maximized by surrounding the light-transmitting area 600.
[0047] The organic light-emitting layer may specifically include multiple light-emitting pixels, which are spaced apart. For example, the multiple light-emitting pixels may include red, green, and blue light-emitting pixels. The desired color can be created by combining the three primary colors of red, green, and blue, thereby realizing the display function of the display module. Optionally, the display module can be an AMOLED (Active-Matrix Organic Light-Emitting Diode) display module.
[0048] Based on the display module disclosed in this application, this application also discloses an electronic device. The disclosed electronic device includes an optical device and the display module described in the above embodiments. The optical device is disposed opposite to the light-transmitting area 600. Specifically, light from the external environment can enter the optical device through the light-transmitting area 600, or light emitted by the optical device can enter the external environment through the light-transmitting area 600, thereby realizing the function of the optical device. Thus, the light-transmitting area 600 is used for light transmission to realize the function of the optical device. Simultaneously, the photosensitive layer 500 uses the light-transmitting area 600 for light sensing. Therefore, the photosensitive layer 500 does not need to be separately disposed in the display area 700 of the display module; that is, the photosensitive layer 500 does not occupy the display area 700 of the display module, which is beneficial for improving the screen-to-body ratio of the display module.
[0049] Optionally, the optical device can be at least one of a camera, a fingerprint recognition module, and a vein recognition module. Of course, the optical device can also be other devices that require the display module to transmit light to achieve corresponding optical performance.
[0050] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.
Claims
1. A display module, characterized in that, The display module includes a substrate (100) and a thin-film transistor (200), an anode (300), a cathode (400), and a photosensitive layer (500) disposed on the substrate (100). The anode (300) is connected to the thin-film transistor (200). The display module has a light-transmitting area (600), and the photosensitive layer (500) is located within the light-transmitting area (600) and disposed between the anode (300) and the cathode (400). The photosensitive layer (500) includes multiple photosensitive units (501), and there are multiple thin-film transistors (200) and anodes (300). The thin-film transistors (200), anodes (300) and photosensitive units (501) correspond one-to-one. The light-transmitting area (600) includes a first photosensitive area (610) and a second photosensitive area (620) arranged adjacent to each other. The first photosensitive area (610) is provided with a plurality of first pixel units (611), and the second photosensitive area (620) is provided with a plurality of second pixel units (621). Each first pixel unit (611) and each second pixel unit (621) includes one photosensitive unit (501). The first pixel unit (611) and the second pixel unit (621) satisfy at least one preset condition. The preset condition includes that the total area of the first pixel unit (611) is greater than or less than the total area of the second pixel unit (621) and that a first ratio is greater than or less than a second ratio. The first ratio is the ratio of the area of the photosensitive unit (501) of the first pixel unit (611) to the total area of the first pixel unit (611), and the second ratio is the ratio of the area of the photosensitive unit (501) of the second pixel unit (621) to the total area of the second pixel unit (621).
2. The display module according to claim 1, characterized in that, The photosensitive layer (500) includes a hole transport layer (511), an active layer (512), and an electron transport layer (513) arranged sequentially. The hole transport layer (511) is connected to the anode (300), and the electron transport layer (513) is connected to the cathode (400).
3. The display module according to claim 1, characterized in that, When the photosensitive layer (500) is used to detect ambient light and the display module is at a first ambient brightness level, the first pixel unit (611) is in a powered-on state and the second pixel unit (621) is in a powered-off state; when the photosensitive layer (500) is used to detect ambient light and the display module is at a second ambient brightness level, the first pixel unit (611) is in a powered-off state and the second pixel unit (621) is in a powered-on state. Wherein, the first ambient brightness is greater than the second ambient brightness, and the first pixel unit (611) and the second pixel unit (621) satisfy at least one preset condition, the preset condition including the total area of the first pixel unit (611) being greater than the total area of the second pixel unit (621) and the first ratio being greater than the second ratio.
4. The display module according to claim 1, characterized in that, When the photosensitive layer (500) is used for biometric identification and infrared light is applied to the light-transmitting area (600), the first pixel unit (611) is in an energized state and the second pixel unit (621) is in an de-energized state; when the photosensitive layer (500) is used for biometric identification and visible light is applied to the light-transmitting area (600), the first pixel unit (611) is in a de-energized state and the second pixel unit (621) is in an energized state. The first pixel unit (611) and the second pixel unit (621) satisfy at least one preset condition, the preset condition including the total area of the first pixel unit (611) being greater than the total area of the second pixel unit (621) and the first ratio being greater than the second ratio.
5. The display module according to claim 1, characterized in that, When the display module is in the first working state, the first pixel unit (611) is in the powered-on state and the second pixel unit (621) is in the powered-off state; when the display module is in the second working state, the first pixel unit (611) is in the powered-off state and the second pixel unit (621) is in the powered-on state. The first working state and the second working state are at least two of the following states: the state in which the photosensitive layer (500) detects ambient light, the state in which the photosensitive layer (500) performs distance detection, and the state in which the photosensitive layer (500) performs biometric identification.
6. The display module according to claim 1, characterized in that, When the photosensitive layer (500) is used for biometric identification, the first pixel unit (611) is in an energized state and the second pixel unit (621) is in an unenergized state. The first pixel unit (611) is a square structure with a side length of 30um-80um.
7. The display module according to claim 1, characterized in that, The display module also has a display area (700) surrounding the light-transmitting area (600). The display module also includes an organic light-emitting layer located within the display area (700) and disposed between the anode (300) and the cathode (400). The organic light-emitting layer and the photosensitive layer (500) are disposed in the same layer.
8. An electronic device, characterized in that, Includes optical components and the display module according to any one of claims 1-7, wherein the optical components are disposed opposite to the light-transmitting area (600).
9. The electronic device according to claim 8, characterized in that, The optical device includes at least one of a camera, a fingerprint recognition module, and a vein recognition module.