CN115631691A - Display module and electronic equipment - Google Patents

Display module and electronic equipment Download PDF

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Publication number
CN115631691A
CN115631691A CN202211324387.7A CN202211324387A CN115631691A CN 115631691 A CN115631691 A CN 115631691A CN 202211324387 A CN202211324387 A CN 202211324387A CN 115631691 A CN115631691 A CN 115631691A
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China
Prior art keywords
pixel unit
display module
photosensitive
state
light
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CN202211324387.7A
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Chinese (zh)
Inventor
詹小舟
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Priority to CN202211324387.7A priority Critical patent/CN115631691A/en
Publication of CN115631691A publication Critical patent/CN115631691A/en
Priority to PCT/CN2023/126088 priority patent/WO2024088230A1/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/14—Vascular patterns
    • G06V40/145—Sensors therefor

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Multimedia (AREA)
  • Human Computer Interaction (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

The application discloses display module assembly and electronic equipment belongs to and shows technical field. The display module comprises a substrate, and a thin film transistor, an anode, a cathode and a photosensitive layer which are arranged on the substrate, wherein the anode is connected with the thin film transistor, the display module is provided with a light transmission area, the photosensitive layer is positioned in the light transmission area, and the photosensitive layer is arranged between the anode and the cathode. The electronic equipment comprises an optical device and the display module, wherein the optical device is arranged opposite to the light-transmitting area.

Description

Display module and electronic equipment
Technical Field
The application belongs to the technical field of display, and particularly relates to a display module and electronic equipment.
Background
With the continuous development of display screen technologies of electronic devices, people have an increasing demand for biological health identification while pursuing a high screen occupation ratio.
In the related art, an electronic device is provided with devices such as a biosensor, a distance sensor, an ambient light sensor and the like, the sensors are independently arranged and are arranged below a display screen, and corresponding functions are realized through the display screen. Therefore, these components inevitably occupy the display area of the display screen, resulting in a reduction in the screen occupation ratio; moreover, these sensor components occupy the internal space of the electronic device, which results in a large occupied space and is not favorable for the miniaturization development of the electronic device.
Disclosure of Invention
The embodiment of the application aims to provide a display module and electronic equipment, and the problem that the sensor of the electronic equipment occupies a large space in the related art can be solved.
In a first aspect, an embodiment of the present application provides a display module, including a substrate and a thin film transistor, an anode, a cathode and a photosensitive layer disposed on the substrate, wherein the anode is connected to the thin film transistor, the display module has a light transmission region, the photosensitive layer is disposed in the light transmission region, and the photosensitive layer is disposed between the anode and the cathode.
In a second aspect, an embodiment of the present application further provides an electronic device, which includes an optical device and the display module described above, where the optical device is disposed opposite to the light-transmitting area.
In the embodiment of the application, the photosensitive layer is arranged in the light-transmitting area of the display module, and can sense the ambient light so as to perform ambient light detection and realize the function of the ambient light sensor; the distance detection can be carried out under the condition that the photosensitive layer is loaded with infrared light, so that the function of a distance sensor is realized; the photosensitive layer can also be used for carrying out biological image recognition under the condition of loading infrared light or visible light, so that the function of the biosensor is realized. Therefore, through setting up the photosensitive layer, can make the light-permeable region of display module assembly possess the function of at least one kind sensor in environment light sensor, distance sensor and the biosensor, the event need not to set up the sensor that corresponds alone again for electronic equipment's sensor quantity reduces, and the event sensor part occupies electronic equipment's space and reduces, is favorable to electronic equipment's miniaturization development.
Drawings
Fig. 1 is a cross-sectional view of a display module disclosed in an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a photosensitive layer, a cathode, and an anode as disclosed in an embodiment of the present application;
fig. 3 is a schematic diagram of a first pixel unit or a second pixel unit disclosed in an embodiment of the present application;
FIG. 4 is a schematic view of a light transmissive region disclosed in one embodiment of the present application;
FIG. 5 is a schematic view of a light transmissive region disclosed in another embodiment of the present application;
fig. 6 is a schematic diagram of an electronic device disclosed in an embodiment of the present application.
Description of the reference numerals:
100-a substrate,
200-thin film transistor, 210-active layer, 220-source, 230-drain, 240-gate,
300-anode,
400-cathode,
500-photosensitive layer, 511-hole transport layer, 512-active layer, 513-electron transport layer, 501-photosensitive unit,
600-light transmission area, 610-first light sensing area, 611-first pixel unit, 620-second light sensing area, 621-second pixel unit,
700-display area,
810-buffer layer, 820-passivation layer, 830-insulating layer, 840-dielectric layer.
Detailed Description
The technical solutions in the embodiments of the present application will be described below clearly with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/", and generally means that the former and latter related objects are in an "or" relationship.
The display module and the electronic device provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Referring to fig. 1 to 5, an embodiment of the present application discloses a display module, which can be applied to an electronic device having an optical device. The display module disclosed in the embodiment of the present application 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, wherein the substrate 100 may be used as a base for disposing other structures included in the display module. In an alternative embodiment, the display module may be a hard-screen structure, and the substrate 100 may include a glass layer, that is, a glass plate may be used to prepare the substrate 100, and the glass plate has a high transmittance, so that the transmittance of the light-transmitting area 600 can be improved. In another alternative embodiment, the display module may be a soft screen structure, and the substrate 100 may be a flexible substrate. In addition, when the display module is a liquid crystal display module, the display module can also comprise a liquid crystal layer, a color filter film and other structures for realizing display; when the display module is an organic light-emitting display module, the display module can further comprise an organic light-emitting layer and other structures for realizing display.
As shown in fig. 1, the anode 300 is connected to the tft 200, the display module has a light-transmitting region 600, the photosensitive layer 500 is located in the light-transmitting region 600, and the photosensitive layer 500 is disposed between the anode 300 and the cathode 400, so that the tft 200 can drive the photosensitive layer 500, and the photosensitive layer 500 is used for photosensitive and converting a light signal into an electrical signal, which can be further processed, thereby achieving the purpose of detection. Alternatively, the tft 200 may be an LTPS (Low Temperature polysilicon), the anode 300 and the cathode 400 may be formed of indium tin oxide, and the photosensitive layer 500 may be an organic photosensitive material. The thin film transistor 200, the anode 300, and the cathode 400 may be originally used to implement display driving in the display module, that is, the thin film transistor 200, the anode 300, and the cathode 400 in the light-transmitting region 600 may be disposed in the same layer as the thin film transistor 200, the anode 300, and the cathode 400 in other regions, respectively, so as to simplify the processing of the display module.
In the embodiment of the application, the photosensitive layer 500 is disposed in the light-transmitting area 600 of the display module, and the photosensitive layer 500 can be used for sensing ambient light to perform ambient light detection, so as to implement the function of an ambient light sensor; the distance detection can be performed on the photosensitive layer 500 under the condition of loading infrared light, so that the function of a distance sensor is realized; the photosensitive layer 500 may also perform biological image recognition under the condition of loading infrared light or visible light, so as to realize the function of a biosensor, and 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 region 600 of the display module can have the function of at least one sensor of the ambient light sensor, the distance sensor and the biosensor, so that the corresponding sensor does not need to be separately arranged, the number of sensors of the electronic device is reduced, the space occupied by the sensor components in the electronic device is reduced, and the miniaturization development of the electronic device is facilitated.
In an alternative embodiment, the photosensitive layer 500 includes an active layer 512, and the active layer 512 absorbs photons and excites photogenerated carriers. The carriers include electrons and holes, and since the movement of the electrons and the holes is irregular, the electrons and the holes are easily combined together during the movement, and the combined electrons and holes disappear, so that the photocurrent is reduced, and the photoelectric conversion efficiency is reduced.
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 being connected to the anode 300, and the electron transport layer 513 being connected to the cathode 400. Wherein the electron transport layer 513 serves to transport electrons separated from carriers to the cathode 400, and the hole transport layer 511 can block electrons, enhance hole transport, and prevent quenching caused by direct contact between the active layer 512 and the anode 300; the hole transport layer 511 serves to transport holes separated from carriers to the anode 300, and the electron transport can be enhanced by the electron transport layer 513, and also the active layer 512 can be prevented from being in direct contact with the cathode 400. By the arrangement, the electrons and the holes are respectively conveyed in the respective conveying layers, so that the electrons and the holes are respectively collected on the corresponding electrodes, and the probability of recombination of the current carriers before reaching the corresponding electrodes is greatly reduced, so that the photocurrent is improved, and the photoelectric conversion efficiency is improved.
In the present embodiment, as shown in fig. 1, the thin film transistor 200 includes an active layer 210, a source electrode 220, a drain electrode 230, and a gate electrode 240, the active layer 210 may be polysilicon, the active layer 210 may be disposed on the substrate 100 through a passivation layer 820, the source electrode 220 and the drain electrode 230 are disposed on the same layer, the active layer 210 is respectively connected to the source electrode 220 and the drain electrode 230, and the source electrode 220 is connected to the anode electrode 300. Also, in the case where 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 of glass from diffusing into 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, the dielectric layer 840 is disposed adjacent to the insulating layer 830, the active layer 210 is disposed in the insulating layer 830, the gate electrode 240 is disposed in the dielectric layer 840, the insulating layer 830 is used for insulating the gate electrode 240, and the dielectric layer 840 is used for insulating and protecting the source electrode 220 and the drain electrode 230.
In an alternative embodiment, the photosensitive layer 500 includes only one photosensitive unit 501, the tft 200, the anode 300 and the photosensitive unit 501 are in one-to-one correspondence, so that the photosensitive unit 501 has a photosensitive effect, and can detect ambient light without loading a light source, thereby achieving an ambient light detection function, but 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 the ridges of a fingerprint, the photosensitive unit 501 cannot identify fingerprint information, and therefore, even in the case of loading a light source, the light-transmitting area 600 cannot perform fingerprint identification, i.e., biometric identification is difficult to achieve, which is not beneficial to the extension of the function of the light-transmitting area 600.
In another embodiment, as shown in fig. 4, the photosensitive layer 500 includes a plurality of photosensitive units 501, the number of the tfts 200 and the number of the anodes 300 are all multiple, the tfts 200, the anodes 300 and the photosensitive units 501 are in one-to-one correspondence, and each tft 200 drives the corresponding photosensitive unit 501 through the corresponding anode 300, so that each photosensitive unit 501 performs a corresponding function. Alternatively, the photosensitive units 501 may be connected or separately disposed. Thus, the light sensing unit 501 can still realize ambient light detection under the condition that the light transmitting area 600 is not loaded with a light source; since the photosensitive layer 500 is divided into a plurality of photosensitive units 501, compared with a scheme that the photosensitive layer 500 includes 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 identification, so that under the condition that the light source is loaded in the light-transmitting area 600, a biometric identification function, such as a fingerprint identification function, can be realized, which is beneficial for the expansion of other functions of the light-transmitting area 600.
In an alternative embodiment, as shown in fig. 5, the light-transmitting area 600 includes a first light-sensing area 610 and a second light-sensing area 620 that are adjacently disposed, a plurality of first pixel units 611 are disposed in the first light-sensing area 610, a plurality of second pixel units 621 are disposed in the second light-sensing area 620, and each of the first pixel units 611 and each of the second pixel units 621 includes one light-sensing unit 501. 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 is a first ratio, and 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 is a second ratio, wherein 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, the light-transmitting region 600 can realize different functions through the first photosensitive region 610 and the second photosensitive region 620, for example, when the first photosensitive region 610 is loaded with visible light, the first photosensitive region 610 performs fingerprint recognition, and when the second photosensitive region 620 is loaded with infrared light, the second photosensitive region 620 performs distance detection, however, the wavelength range of visible light and the wavelength range of infrared light are different, and if pixel units with the same area and/or pixel units with the same proportion are used, that is, the full-well capacity is the same, the full-well capacity of the photosensitive region and the wavelength range of the loaded light are not matched, so that the function recognition accuracy is low, and the detection accuracy is reduced.
Therefore, in another embodiment, the first pixel unit 611 and the second pixel unit 621 satisfy at least one predetermined condition, and the predetermined condition may include 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 the first ratio is greater than or less than the second ratio, in other words, the first pixel unit 611 and the second pixel unit 621 satisfy at least one of two predetermined conditions that 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, that is, the total area of the first pixel unit 611 is not equal to the total area of the second pixel unit 621, and/or the first ratio is not equal to the second ratio. Specifically, the larger the total area of the first and second pixel units 611 and 621 is, the smaller the density of the first and second light- sensing regions 610 and 620 is, and conversely, the smaller the total area of the first and second pixel units 611 and 621 is, the larger the density of the first and second light- sensing regions 610 and 620 is. Thus, the pixel units with different areas and/or the photosensitive units 501 occupy the pixel units with different proportions to respectively match different wavelength ranges of light, so that the wavelength ranges of the pixel units and the loaded light are more adaptive, which is beneficial to improving the precision of function identification and the accuracy of detection.
Alternatively, in a case where the first photosensitive region 610 is not loaded with a light source, the first pixel unit 611 detects ambient light; in the case where the second photosensitive region 620 is loaded with the light source, the second pixel unit 621 performs biometric recognition. Specifically, in the case where the second photosensitive region 620 is loaded with visible light, the second pixel unit 621 performs fingerprint recognition; in the case where the second photosensitive region 620 is loaded with infrared light, the second pixel unit 621 performs vein recognition.
In an alternative embodiment, when the photosensitive layer 500 is used for detecting ambient light and the display module is at the first ambient brightness, the first pixel unit 611 is in the power-on state, and the second pixel unit 621 is in the power-off state; when the photosensitive layer 500 is used for detecting the ambient light and the display module is at the second ambient brightness, the first pixel unit 611 is in the power-off state and the second pixel unit 621 is in the power-on state. Alternatively, power on and power off of the first pixel unit 611 and the second pixel unit 621 are controlled by power on and power off of the corresponding thin film transistor 200, respectively. The first ambient brightness is greater than the second ambient brightness, that is, the first pixel unit 611 is powered on and operated under a strong light condition, and the second pixel unit 621 is powered on and operated under a weak light condition.
Also, 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 may be fixed brightness values respectively, and the first ambient brightness and the second ambient brightness may also be brightness ranges, in which case, that the first ambient brightness is greater than the second ambient brightness means that a lowest value of the first ambient brightness range is greater than a highest value of the second ambient brightness range. Thus, the first pixel unit 611 with a smaller total area and/or a smaller occupation ratio of the photosensitive unit 501 is used to adapt to the strong light condition, and cannot meet the requirement of larger full well capacity; similarly, the second pixel unit 621 with a larger total area and/or a larger occupation ratio of the light sensing unit 501 is used to adapt to the weak light condition, and the requirement of a smaller full well capacity cannot be met, so that the accuracy of ambient light detection is poor.
Therefore, in another embodiment, the first pixel unit 611 and the second pixel unit 621 satisfy at least one preset condition, and the preset condition may include that the total area of the first pixel unit 611 is greater than the total area of the second pixel unit 621 and the first ratio is greater than the second ratio, in other words, at least one of the preset conditions that the total area of the first pixel unit 611 is greater than the total area of the second pixel unit 621 and the first ratio is greater than the second ratio is satisfied by the first pixel unit 611 and the second pixel unit 621. Thus, the first pixel unit 611 with a larger total area and/or a larger occupation ratio of the photosensitive unit 501 is used to adapt to the strong light condition, so as to meet the requirement of larger full well capacity; similarly, the second pixel unit 621 with a smaller total area and/or a smaller occupation ratio of the light sensing unit 501 is used to adapt to the low light condition, so as to meet the requirement of smaller full well capacity, and be beneficial to improving the accuracy of ambient light detection.
Alternatively, the light-transmitting region 600 may include three photosensitive regions, two of which are used to detect ambient light under high light conditions and low light conditions, respectively, and another of which is used to perform distance detection or biometric identification.
In an alternative embodiment, in the case where the photosensitive layer 500 is used for biometric identification and the light-transmitting region 600 is loaded with infrared light, the first pixel unit 611 is in the power-on state, and the second pixel unit 621 is in the power-off state; in the case where the photosensitive layer 500 is used for biometric authentication and the light-transmitting region 600 is loaded with visible light, the first pixel unit 611 is in a power-off state and the second pixel unit 621 is in a power-on state. Alternatively, power on and power off of the first pixel unit 611 and the second pixel unit 621 are controlled by power on and power off of the corresponding thin film transistor 200, respectively. Specifically, the wavelength range of infrared light is usually greater than 720nm, the wavelength range of visible light is 400nm-720nm, so the wavelength of infrared light is greater than that of visible light, and 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, i.e., 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 smaller than or equal to the total area of the second pixel unit 621, and/or the first ratio is smaller than or equal to the second ratio, i.e., 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, resulting in the accuracy of biometric identification being reduced.
In another embodiment, the first pixel unit 611 and the second pixel unit 621 satisfy at least one preset condition, where the preset condition may include that the total area of the first pixel unit 611 is larger than the total area of the second pixel unit 621 and the first ratio is larger than the second ratio, in other words, the first pixel unit 611 and the second pixel unit 621 satisfy at least one of two preset conditions that the total area of the first pixel unit 611 is larger than the total area of the second pixel unit 621 and the first ratio is larger 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 to improving the accuracy of biometric identification.
Alternatively, the light-transmitting area 600 may include four photosensitive areas, two of which are used for detecting the ambient light under the high light condition and the low light condition, and the other two of which are used for biometric identification, specifically, two of which are used for vein identification under the condition of loading infrared light and the other of which is used for fingerprint identification under the condition of loading visible light.
In an alternative embodiment, when the display module is in the first working state, the first pixel unit 611 is in an on state, and the second pixel unit 621 is in an off state; when the display module is in the second operating state, the first pixel unit 611 is in a power-off state, and the second pixel unit 621 is in a power-on state. The first operating state and the second operating state are at least two states of the photosensitive layer 500 detecting the ambient light, the photosensitive layer 500 detecting the distance, and the photosensitive layer 500 performing the biometric identification, respectively. Alternatively, the power on and off of the first pixel unit 611 are controlled by the power on and off of the corresponding thin film transistor 200, respectively. In order to realize different functions of 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 may be different, the types of the applied light sources may be different, and other differences may exist, in short, the photosensitive layer 500 and the light transmitting area 600 are divided into different areas, so that each area respectively realizes different functions, which is beneficial to the extension of the functions of the photosensitive layer 500; meanwhile, the photosensitive layer 500 has functions of at least two sensors among an ambient light sensor, a distance sensor, and a biometric sensor, the number of sensor parts provided to the electronic device is further reduced, the space occupied by the electronic device is also further reduced, and the miniaturization development of the electronic device is facilitated.
In an alternative embodiment, in the case where the photosensitive layer 500 is used for biometric identification, the first pixel unit 611 is in a power-on state, the second pixel unit 621 is in a power-off state, the first pixel unit 611 is in a square structure, and the side length of the square structure is 30um to 80um. Alternatively, in the case where the first photosensitive region 610 is loaded with infrared light, the first pixel unit 611 is in an on state, and the second pixel unit 621 is in an off state, to perform vein recognition; in the case where the first photosensitive region 610 is loaded with visible light, the first pixel unit 611 is in a power-on state, and the second pixel unit 621 is in a power-off state, so as to perform fingerprint recognition. Thus, the dimension of the first pixel unit 611 satisfies the above condition, and the full well capacity of the first photosensitive region 610 reaches a suitable range, so as to match with the wavelength range of light required for biometric identification, thereby improving the accuracy of biometric identification.
In the scheme of this application, the display module assembly still includes display area 700, and display area 700 encircles the setting of light transmission area 600, and the display module assembly still includes organic light emitting layer, and organic light emitting layer is located display area 700, and organic light emitting layer sets up between positive pole 300 and negative pole 400, and organic light emitting layer and photosensitive layer 500 are with the layer setting. Specifically, the organic light emitting layer may include a hole transport layer 511, an electron transport layer 513, and an electroluminescent layer, wherein the electroluminescent layer may convert an electrical signal into an optical signal. In practice, an electric field may be formed between the anode 300 and the cathode 400, and the organic light emitting layer may emit light under the action of the electric field. In this way, the display function of the display area 700 is realized by the organic light emitting layer, and at the same time, the display area 700 is maximized by surrounding the light transmission area 600 by the display area 700.
The organic light emitting layer may specifically include a plurality of light emitting pixels, and each of the light emitting pixels is disposed at an interval, for example, the plurality of light emitting pixels may include a red light emitting pixel, a green light emitting pixel, and a blue light emitting pixel, and a desired color may be combined by three primary colors of red, green, and blue, thereby implementing a display function of the display module. Optionally, the display module may be an AMOLED (Active-Matrix Organic Light-Emitting Diode) display module.
Based on the display module assembly that this application disclosed, this application embodiment still discloses an electronic equipment, and the display module assembly in the disclosed electronic equipment includes optical device and the above-mentioned embodiment, and optical device sets up with light-permeable region 600 is relative. Specifically, light in the external environment may enter the optical device through the light-transmitting region 600, or light emitted from the optical device may enter the external environment through the light-transmitting region 600, thereby implementing the function of the optical device. So, the light transmission area 600 is used for the printing opacity in order to realize optical device's function, and simultaneously, photosensitive layer 500 carries out the sensitization with the help of light transmission area 600, so photosensitive layer 500 need not to set up alone at display module's display area 700, and photosensitive layer 500 can not occupy display module's display area 700 promptly, is favorable to improving display module's screen and accounts for the ratio.
Optionally, the optical device may be at least one of a camera, a fingerprint recognition module, and a vein recognition module. Of course, the optical device may also be other devices that require the display module to transmit light to achieve corresponding optical performance.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the present embodiments are not limited to those precise embodiments, which are intended to be illustrative rather than restrictive, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope of the appended claims.

Claims (11)

1. A display module is characterized by comprising a substrate (100), and a thin film transistor (200), an anode (300), a cathode (400) and a photosensitive layer (500) which are arranged on the substrate (100), wherein the anode (300) is connected with the thin film transistor (200), the display module is provided with a light transmission area (600), the photosensitive layer (500) is positioned in the light transmission area (600), and the photosensitive layer (500) is arranged between the anode (300) and the cathode (400).
2. The display module according to claim 1, wherein the photosensitive layer (500) comprises a hole transport layer (511), an active layer (512) and an electron transport layer (513) sequentially arranged, the hole transport layer (511) is connected with the anode (300), and the electron transport layer (513) is connected with the cathode (400).
3. The display module according to claim 1, wherein the photosensitive layer (500) comprises a plurality of photosensitive units (501), the number of the thin film transistors (200) and the anodes (300) is multiple, and the thin film transistors (200), the anodes (300) and the photosensitive units (501) are in one-to-one correspondence.
4. The display module according to claim 3, wherein the light transmissive region (600) comprises a first photosensitive region (610) and a second photosensitive region (620) disposed adjacently, a plurality of first pixel units (611) are disposed in the first photosensitive region (610), a plurality of second pixel units (621) are disposed in the second photosensitive region (620), each of the first pixel units (611) and each of the second pixel units (621) comprises one of the photosensitive units (501),
the first pixel unit (611) and the second pixel unit (621) meet at least one preset condition, wherein the preset condition comprises that the total area of the first pixel unit (611) is larger than or smaller than that of the second pixel unit (621) and a first ratio is larger than or smaller than a second ratio, 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) is the first ratio, and 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) is the second ratio.
5. The display module according to claim 4, wherein when the photosensitive layer (500) is used for detecting ambient light and the display module is at a first ambient brightness, the first pixel unit (611) is in a power-on state, and the second pixel unit (621) is in a power-off state; when the photosensitive layer (500) is used for detecting ambient light and the display module is at a second ambient brightness, the first pixel unit (611) is in a power-off state, and the second pixel unit (621) is in a power-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 includes that a total area of the first pixel unit (611) is greater than a total area of the second pixel unit (621) and the first ratio is greater than the second ratio.
6. The display module according to claim 4, wherein when the photosensitive layer (500) is used for biological recognition and the transparent region (600) is loaded with infrared light, the first pixel unit (611) is in a power-on state and the second pixel unit (621) is in a power-off state; when the photosensitive layer (500) is used for biological identification and the light-transmitting area (600) is loaded with visible light, the first pixel unit (611) is in a power-off state and the second pixel unit (621) is in a power-on state;
wherein the first pixel unit (611) and the second pixel unit (621) satisfy at least one preset condition, the preset condition including that a total area of the first pixel unit (611) is greater than a total area of the second pixel unit (621) and that the first ratio is greater than the second ratio.
7. A display module according to claim 4, wherein in a first operating state of the display module, the first pixel unit (611) is in a power-on state and the second pixel unit (621) is in a power-off state; under the condition that the display module is in a second working state, the first pixel unit (611) is in a power-off state, and the second pixel unit (621) is in a power-on state;
wherein the first operating state and the second operating state are at least two states of a state in which the photosensitive layer (500) detects ambient light, a state in which the photosensitive layer (500) performs distance detection, and a state in which the photosensitive layer (500) performs biometric recognition, respectively.
8. The display module according to claim 4, wherein, when the photosensitive layer (500) is used for biometric identification, the first pixel unit (611) is in a power-on state, the second pixel unit (621) is in a power-off state, the first pixel unit (611) is in a square structure, and a side length of the square structure is 30um-80um.
9. The display module according to claim 1, wherein the display module further has a display area (700), the display area (700) is disposed around the light transmissive area (600), the display module further comprises an organic light emitting layer, the organic light emitting layer is disposed in the display area (700) and disposed between the anode (300) and the cathode (400), and the organic light emitting layer and the photosensitive layer (500) are disposed in the same layer.
10. An electronic device, characterized in that it comprises an optical device and a display module according to any one of claims 1 to 9, said optical device being arranged opposite said light-transmissive area (600).
11. The electronic device of claim 10, wherein the optics comprise at least one of a camera, a fingerprint recognition module, and a vein recognition module.
CN202211324387.7A 2022-10-27 2022-10-27 Display module and electronic equipment Pending CN115631691A (en)

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