CN110718580A - Display module and electronic equipment - Google Patents

Abstract

The application relates to a display module and electronic equipment. The display module comprises a pixel layer, a first cathode layer, an anode layer and a second cathode layer, wherein the pixel layer comprises a first pixel unit and a second pixel unit, the first cathode layer is arranged on one side of the pixel layer, and the first cathode layer comprises a first cathode unit and a second cathode unit which are arranged at intervals. The anode layer is arranged on one side of the pixel layer, which is far away from the first cathode layer, and comprises a first anode unit and a second anode unit which are arranged at intervals, and the first anode unit and the second anode unit form a light-transmitting area. The second cathode layer is arranged on one side of the first cathode layer, which is far away from the pixel layer, the second cathode layer covers the pixel layer and the light-transmitting area, and the light transmittance of the second cathode layer is larger than that of the first cathode layer. Ambient light can pass through the second cathode layer and is incident from the light-transmitting area to a side of the anode layer facing away from the pixel layer. The display module can realize high screen occupation ratio of the electronic equipment.

Description

Display modules and electronic equipment

technical field

The present application relates to the technical field of display screens, and in particular, to a display module and an electronic device.

Background technique

In order to increase the screen ratio of the mobile terminal, the general solution is to open a hole or a slot in the display screen, and install the front camera in the hole or slot. In the mobile terminal with this structure, the circumferential direction of the front camera needs to retain an opaque area, which sacrifices the display area of the display screen.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a display module and an electronic device, and the electronic device can obtain a higher screen ratio.

A display module, comprising:

a pixel layer, comprising a first pixel unit and a second pixel unit, the first pixel unit and the second pixel unit are arranged at intervals;

a first cathode layer, disposed on one side of the pixel layer, and the first cathode layer includes a first cathode unit and a second cathode unit arranged at intervals, the first cathode unit is connected to the first pixel unit, the second cathode unit is connected to the second pixel unit;

an anode layer, disposed on the side of the pixel layer away from the first cathode layer, the anode layer includes a first anode unit and a second anode unit spaced apart, the first anode unit and the second anode unit The anode unit forms a light-transmitting area, the first anode unit is connected to the first pixel unit, and the second anode unit is connected to the second pixel unit; and

The second cathode layer is disposed on the side of the first cathode layer away from the pixel layer, the second cathode layer covers the pixel layer and the light-transmitting area, and the light-transmitting area of the second cathode layer The light transmittance is greater than the light transmittance of the first cathode layer; ambient light can pass through the second cathode layer and be incident on the side of the anode layer away from the pixel layer from the light-transmitting area.

In the above display module, since the transmittance of the second cathode layer is greater than that of the first cathode layer, and the first cathode unit and the second cathode unit of the first cathode layer are arranged at intervals, ambient light can pass through the second cathode The layer is incident to the light-transmitting region from the gap between the first cathode unit and the second cathode unit, and to the side of the anode layer that is away from the pixel layer. The arrangement of the first cathode layer and the second cathode layer can not only ensure the display effect of the display module, but also achieve high light transmittance in the light transmission area. The camera module can be set corresponding to the light-transmitting area and enter light from the light-transmitting area, that is, the camera module can be covered by the display module and the camera module does not affect the display area of the display module, so it can achieve a high screen occupation of electronic equipment. Compare.

In one embodiment, the light transmittance of the first cathode layer is 40%-60%, and the light transmittance of the second cathode layer is greater than 80%.

In one embodiment, the material of the first cathode layer is MgAg alloy, and the material of the second cathode layer is AZO.

In one embodiment, the display module includes a thin film transistor layer, and the thin film transistor layer is disposed on a side of the anode layer away from the pixel layer.

In one of the embodiments, the thin film transistor layer includes electrical connection lines, and at least part of the electrical connection lines are shielded by the anode layer.

In one embodiment, the cross-sectional area of the first anode unit is larger than the cross-sectional area of the first pixel unit, and the cross-sectional area of the second anode unit is larger than the second pixel unit. The area of the cross section.

In one embodiment, the first anode unit includes a first region and a second region connected to the first region, and the projection of the first region on the second cathode layer is located at the first cathode The unit is within the projection of the second cathode layer, the projection of the second region on the second cathode layer is outside the projection of the first cathode unit on the second cathode layer, at least part of the electrical connection Lines are shaded by the second region.

In one embodiment, the display module includes a polarizer disposed on a side of the second cathode layer away from the pixel layer, and the polarizer covers the pixel layer.

In one embodiment, the display module includes a protective layer, and the protective layer is disposed on a side of the polarizer away from the second cathode layer.

In one embodiment, the display module includes a first display area and a second display area, the first display area is connected to the second display area, and the light-transmitting area is located in the first display area.

An electronic device includes a camera module and the display module described in any one of the above embodiments, the display module covers the camera module, and the camera module can enter light from the light-transmitting area.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a front view of an electronic device in one embodiment;

2 is a cross-sectional view of a display module of the electronic device shown in FIG. 1;

3 is another cross-sectional view of the display module of the electronic device shown in FIG. 1;

4 is a front view of an electronic device in another embodiment;

FIG. 5 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

Detailed ways

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the related drawings. The preferred embodiments of the present application are shown in the accompanying drawings. However, the application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the disclosure of this application is provided.

As used herein, "terminal equipment" refers to a device capable of receiving and/or sending communication signals, including but not limited to, connected via any one or several of the following connection methods:

(1) Connection via wired line, such as via public switched telephone network (Public SwitchedTelephone Networks, PSTN), digital subscriber line (Digital Subscriber Line, DSL), digital cable, direct cable connection;

(2) Via a wireless interface, such as a cellular network, a wireless local area network (Wireless Local Area Network, WLAN), a digital TV network such as a DVB-H network, a satellite network, and an AM-FM broadcast transmitter.

A terminal device arranged to communicate via a wireless interface may be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

(1) Satellite telephone or cellular telephone;

(2) Personal Communications System (PCS) terminals that can combine cellular radio telephones with data processing, facsimile, and data communication capabilities;

(3) Radiotelephone, pager, Internet/Intranet access, Web browser, memo pad, calendar, Personal Digital Assistant (PDA) equipped with a Global Positioning System (Global Positioning System, GPS) receiver;

(4) conventional laptop and/or palm-sized receivers;

(5) Conventional laptop and/or palm radiotelephone transceivers and the like.

Referring to FIG. 1 , in one embodiment, the electronic device 10 includes a display module 100 and a housing 200 , and the display module 100 is mounted on the housing 200 . The housing 200 is formed with a mounting cavity for mounting electronic components such as batteries and circuit boards of the electronic device 10 . The electronic device 10 further includes a camera module 300, the camera module 300 is covered by the display module 100, and the camera module 300 can enter light from the side where the display module 100 is located, that is, the camera module 300 can perform the function of the front camera. , the user can perform operations such as self-portrait and video call through the camera module 300 . In the embodiment of the present application, the display module 100 is an OLED screen, and the display module 100 can be used to display information and provide an interactive interface for the user. Referring to FIG. 2 at the same time, the display module 100 includes a pixel layer 110 , a first cathode layer 120 , an anode layer 130 and a second cathode layer 140 . The pixel layer 110 includes a first pixel unit 111 and a second pixel unit 113, and the first pixel unit 111 and the second pixel unit 113 are arranged at intervals. In some embodiments, the first pixel unit 111 includes an electron injection layer, an electron transport layer, an organic light-emitting layer, a hole transport layer, and a hole injection layer that are stacked in sequence, and the second pixel unit 113 and the first pixel unit 111 are structured Similarly, the second pixel unit 113 includes an electron injection layer, an electron transport layer, an organic light emitting layer, a hole transport layer and a hole injection layer. The materials of the organic light-emitting layer of the first pixel unit 111 and the organic light-emitting layer of the second pixel unit 113 may be the same or different. For example, in some embodiments, the organic light-emitting layer of the first pixel unit 111 emits red light, and the organic light-emitting layer of the second pixel unit 113 emits blue light when it emits light. Of course, the pixel layer 110 may also include other pixel units. The pixel units of the pixel layer 110 are arranged at intervals and can display three primary colors of red, blue and green when powered on. The three primary colors can be mixed to form a color.

The first cathode layer 120 is disposed on one side of the pixel layer 110, and the first cathode layer 120 includes a first cathode unit 121 and a second cathode unit 123 arranged at intervals. The first cathode unit 121 is connected to the first pixel unit 111, and the second The cathode unit 123 is connected to the second pixel unit 113 . In the embodiment in which the pixel layer 110 includes other pixel units, the first cathode layer 120 may be provided with other cathode units correspondingly to control other pixel units. The anode layer 130 is disposed on the side of the pixel layer 110 away from the first cathode layer 120 , and the anode layer 130 includes a first anode unit 131 and a second anode unit 133 arranged at intervals, and the first anode unit 131 and the second anode unit 133 are formed In the transparent area 101 , the first anode unit 131 is connected to the first pixel unit 111 , the second anode unit 133 is connected to the second pixel unit 113 , and the camera module 300 is disposed corresponding to the transparent area 101 and can enter light from the transparent area 101 . The anode layer 130 is made of a metal material with low light transmittance, for example, the light transmittance of the anode layer 130 is below 30%. In the embodiment in which the pixel layer 110 includes other pixel units, the anode layer 130 may be provided with anode units corresponding to the other pixel units. In short, in the embodiment where the pixel layer 110 includes more than three pixel units, an anode unit and a cathode unit are respectively provided on opposite sides of each pixel unit, the anode unit is connected to the hole injection layer, and the cathode unit is connected to When the electron injection layer, the anode unit and the cathode unit are powered on, the pixel unit can emit light, which is then used for display.

The second cathode layer 140 is disposed on the side of the first cathode layer 120 away from the pixel layer 110 , the second cathode layer 140 covers the pixel layer 110 and the light transmission area 101 , and the light transmittance of the second cathode layer 140 is greater than that of the first cathode layer With a light transmittance of 120, ambient light can pass through the second cathode layer 140 and be incident to the side of the anode layer 130 away from the pixel layer 110 from the light-transmitting region 101 . In some embodiments, the light transmittance of the first cathode layer 120 is 40%-60%, and the light transmittance of the second cathode layer 140 is greater than 80%. Further, in the embodiment of the present application, the material of the first cathode layer 120 is MgAg alloy, and its light transmittance is about 50%, and the material of the second cathode layer 140 is AZO (aluminum-doped zinc oxide film), which is The transmittance is 80%-90%. After the ambient light passes through the second cathode layer 140 , passes through the gap of the first cathode layer 120 , and then passes through the light-transmitting region 101 formed by the anode layer 130 , the ambient light can be incident on the side of the anode layer 130 away from the pixel unit. In other embodiments, the material of the second cathode layer 140 may be other materials with good electrical conductivity and relatively high light transmittance.

The above-mentioned display module 100, because the light transmittance of the second cathode layer 140 is greater than the light transmittance of the first cathode layer 120, and the first cathode unit 121 and the second cathode unit 123 of the first cathode layer 120 are arranged at intervals, the ambient light It can pass through the second cathode layer 140 and be incident to the light-transmitting region 101 from the interval between the first cathode unit 121 and the second cathode unit 123 , and be incident to the side of the anode layer 130 away from the pixel layer 110 . The arrangement of the first cathode layer 120 and the second cathode layer 140 can not only ensure the display effect of the display module 100 , but also achieve high light transmittance in the light transmission area 101 . The camera module 300 can be set corresponding to the light-transmitting area 101 and enter light from the light-transmitting area 101, that is, the camera module 300 can be covered by the display module 100 and the camera module 300 does not affect the display area of the display module 100, so it can be A high screen-to-body ratio of the electronic device 10 is achieved. In the actual application process, the part of the display module 100 covering the camera module 300 can not only display images normally, but also become transparent to obtain higher light transmittance, which is then used for the incoming light of the camera module 300 and the This enables the camera module 300 to obtain higher shooting quality, thereby enabling the design of the under-screen camera to obtain a very high screen-to-body ratio. For example, the screen ratio of the electronic device 10 using this solution can be over 90%.

Further, referring to FIG. 2 , the display module 100 includes a thin film transistor layer 150 , and the thin film transistor layer 150 is disposed on the side of the anode layer 130 away from the pixel layer 110 . The thin film transistor layer 150 can be used to lead out the wiring of the anode layer 130, so as to control the conduction of each anode unit. Specifically, the thin film transistor layer 150 includes electrical connection lines 151 and a film (not shown) for supporting the electrical connection lines 151, etc. At least part of the electrical connection lines 151 are shielded by the anode layer 130, and the electrical connection lines 151 can be connected to the display mode The control chip of the group 100 further controls each pixel unit of the pixel layer 110 through the control chip, thereby controlling the display of the display module 100 . Specifically, taking the display module 100 including the first anode unit 131 and the second anode unit 133 as an example, the cross-sectional area of the first anode unit 131 is larger than the cross-sectional area of the first pixel unit 111 , and the second anode unit 133 The area of the cross section is larger than the area of the cross section of the second pixel unit 113 . By enlarging the areas of the first anode unit 131 and the second anode unit 133, the first anode unit 131, the second anode unit 133 and other anode units can be used to shield the thin film transistor by taking advantage of the low transmittance of the anode layer 130. The electrical connection line 151 of the layer 150, so that the light passing through the light-transmitting area 101 does not pass through the area where the electrical connection line 151 is located, preventing the light from diffracting under the action of the electrical connection line 151, thereby improving the imaging of the camera module 300. quality.

Further, taking the first anode unit 131 as an example, the first anode unit 131 includes a first area 131a and a second area 131b connected to the first area 131a, and the projection of the first area 131a on the second cathode layer 140 is located at the first cathode The unit 121 is within the projection of the second cathode layer 140, the projection of the second region 131b on the second cathode layer 140 is located outside the projection of the first pixel unit 111 on the second cathode layer 140, and at least part of the electrical connection lines 151 are covered by the second region. 131b shaded. This arrangement can expand the light-shielding area of the anode layer 130, and when the area of the light-transmitting region 101 is increased, the electrical connection lines 151 of the thin-film transistor layer 150 can be shielded as much as possible, thereby increasing the light-transmitting area and preventing incident The light reaching the camera module 300 is diffracted, so that the imaging quality of the camera module 300 can be improved. The arrangement of the second anode unit 133 is similar to that of the first anode unit 131 , and details are not repeated here.

Further, referring to FIG. 3 , the display module 100 includes a polarizer 160 disposed on a side of the second cathode layer 140 away from the pixel layer 110 , and the polarizer 160 covers the pixel layer 110 . Further, the display module 100 includes a protective layer 170 , and the protective layer 170 is disposed on the side of the polarizer 160 away from the second cathode layer 140 . The material of the protective layer 170 can be glass, or can be an organic polymer material such as plastic, and the protective layer 170 can better protect other structures of the display module 100 .

Further, referring to FIG. 4 , in some embodiments, the display module 100 includes a first display area 103 and a second display area 105 , the first display area 103 is connected to the second display area 105 , and the light-transmitting area 101 is located in the first display area 103. The structures of the second display area 105 and the first display area 103 may be different. For example, the first cathode layer 120 of the second display area 105 can be connected into a whole piece without providing a light-transmitting area, and the electrical connection lines 151 of the second display area 105 do not need to be shielded by the anode layer 130 . Corresponding to the installation position of the camera module 300 , the first display area 103 may adopt the structures of the first cathode layer 120 , the second cathode layer 140 , the anode layer 130 and the electrical connection lines 151 in the above embodiments. Of course, this setting is not necessary. For example, the electronic device 10 may not need to distinguish the first display area 103 and the second display area 105, and the entire display module 100 may adopt the structure in the above-mentioned embodiment.

Referring to FIG. 5 , FIG. 5 is a schematic structural diagram of an electronic device 10 provided by the present application. The electronic device 10 may include a radio frequency (RF, Radio Frequency) circuit 501, a memory 502 including one or more computer-readable storage media, an input unit 503, a display unit 504, a sensor 505, an audio circuit 506, a wireless fidelity ( WiFi, Wireless Fidelity) module 507, a processor 508 including one or more processing cores, a power supply 509 and other components. Those skilled in the art can understand that the structure of the electronic device 10 shown in FIG. 5 does not constitute a limitation to the electronic device 10, and may include more or less components than the one shown, or combine some components, or different components layout.

The radio frequency circuit 501 can be used to send and receive information, or to receive and send signals during a call. In particular, after receiving the downlink information of the base station, it is handed over to one or more processors 508 for processing; in addition, it sends the uplink data to the base station. . Generally, the radio frequency circuit 501 includes, but is not limited to, an antenna, at least one amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM) card, a transceiver, a coupler, a low noise amplifier (LNA, Low Noise Amplifier), duplexer, etc. In addition, the radio frequency circuit 501 can also communicate with the network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile Communication (GSM, Global System of Mobile communication), General Packet Radio Service (GPRS, General Packet Radio Service), Code Division Multiple Access (CDMA, Code Division Multiple Access), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), Long Term Evolution (LTE, Long TermEvolution), email, Short Messaging Service (SMS, Short Messaging Service), etc.

Memory 502 may be used to store applications and data. The application program stored in the memory 502 contains executable code. Applications can be composed of various functional modules. The processor 508 executes various functional applications and data processing by executing application programs stored in the memory 502 . The memory 502 may mainly include a stored program area and a stored data area, wherein the stored program area may store an operating system, an application program (such as a sound playback function, an image playback function, etc.) required for at least one function, and the like; The use of the electronic device 10 creates data (such as audio data, phone book, etc.) and the like. Additionally, memory 502 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory 502 may also include a memory controller to provide access to the memory 502 by the processor 508 and the input unit 503 .

The input unit 503 can be used to receive input numbers, character information or user characteristic information (such as fingerprints), and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control. Specifically, in a specific embodiment, the input unit 503 may include a touch-sensitive surface as well as other input devices. A touch-sensitive surface, also known as a touch display or trackpad, collects the user's touch operations on or near it (such as the user's finger, stylus, etc., any suitable operation near the surface), and drive the corresponding connection device according to the preset program. Alternatively, the touch-sensitive surface may include two parts, a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it to the touch controller. To the processor 508, and can receive the command sent by the processor 508 and execute it.

The display unit 504 may be used to display information input by or provided to the user and various graphical user interfaces of the electronic device 10, which may be composed of graphics, text, icons, video, and any combination thereof. The display unit 504 may include a display panel. Optionally, the display panel may be configured in the form of a liquid crystal display (LCD, Liquid Crystal Display), an organic light emitting diode (OLED, Organic Light-Emitting Diode), and the like. Further, the touch-sensitive surface may cover the display panel, and when the touch-sensitive surface detects a touch operation on or near it, it is transmitted to the processor 508 to determine the type of the touch event, and then the processor 508 displays the touch event according to the type of the touch event. The corresponding visual output is provided on the panel. Although in FIG. 5 the touch-sensitive surface and the display panel are implemented as two separate components to implement the input and input functions, in some embodiments, the touch-sensitive surface and the display panel may be integrated to implement the input and output functions.

The electronic device 10 may also include at least one sensor 505, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel according to the brightness of the ambient light, and the proximity sensor may turn off the display panel and/or when the electronic device 10 is moved to the ear. or backlight. As a kind of motion sensor, the gravitational acceleration sensor can detect the magnitude of acceleration in all directions (usually three axes), and can detect the magnitude and direction of gravity when stationary, and can be used for applications that recognize the attitude of mobile phones (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors such as gyroscope, barometer, hygrometer, thermometer, infrared sensor, etc. that can be configured in the electronic device 10, here No longer.

The audio circuit 506 may provide an audio interface between the user and the electronic device 10 through speakers and microphones. The audio circuit 506 can convert the received audio data into an electrical signal, transmit it to the speaker, and the speaker converts it into a sound signal for output; on the other hand, the microphone converts the collected sound signal into an electrical signal, which is converted into an electrical signal after being received by the audio circuit 506. After the audio data is processed by the output processor 508, the audio data is sent to, for example, another electronic device 10 via the radio frequency circuit 501, or the audio data is output to the memory 502 for further processing. The audio circuit 506 may also include a headphone holder to provide communication of peripheral headphones with the electronic device 10 .

Wireless Fidelity (WiFi) is a short-distance wireless transmission technology, and the electronic device 10 can help users to send and receive emails, browse web pages, access streaming media, etc. through the Wi-Fi module 507, which provides users with wireless broadband Internet access. Although FIG. 5 shows the Wi-Fi module 507, it can be understood that it does not belong to the necessary structure of the electronic device 10, and can be completely omitted as required within the scope of not changing the essence of the invention.

The processor 508 is the control center of the electronic device 10, uses various interfaces and lines to connect various parts of the entire electronic device 10, and executes by running or executing the application program stored in the memory 502 and calling the data stored in the memory 502. Various functions and processing data of the electronic device 10 to monitor the electronic device 10 as a whole. Optionally, the processor 508 may include one or more processing cores; preferably, the processor 508 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, etc. , the modem processor mainly deals with wireless communication. It can be understood that, the above-mentioned modulation and demodulation processor may not be integrated into the processor 508 .

The electronic device 10 also includes a power supply 509 for powering the various components. Preferably, the power supply 509 can be logically connected to the processor 508 through a power management system, so that functions such as charging, discharging, and power consumption management are implemented through the power management system. The power source 509 may also include one or more DC or AC power sources, recharging systems, power failure detection circuits, power converters or inverters, power status indicators, and any other components.

Although not shown in FIG. 5 , the electronic device 10 may also include a Bluetooth module, etc., which will not be described herein again. During specific implementation, the above modules can be implemented as independent entities, or can be arbitrarily combined to be implemented as the same or several entities. The specific implementation of the above modules can refer to the previous method embodiments, which will not be repeated here.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

Claims (11)

1. A display module, comprising:

the pixel layer comprises a first pixel unit and a second pixel unit, and the first pixel unit and the second pixel unit are arranged at intervals;

the first cathode layer is arranged on one side of the pixel layer and comprises a first cathode unit and a second cathode unit which are arranged at intervals, the first cathode unit is connected with the first pixel unit, and the second cathode unit is connected with the second pixel unit;

the anode layer is arranged on one side, away from the first cathode layer, of the pixel layer and comprises a first anode unit and a second anode unit which are arranged at intervals, a light-transmitting area is formed by the first anode unit and the second anode unit, the first anode unit is connected with the first pixel unit, and the second anode unit is connected with the second pixel unit; and

the second cathode layer is arranged on one side of the first cathode layer, which is far away from the pixel layer, the second cathode layer covers the pixel layer and the light-transmitting area, and the light transmittance of the second cathode layer is greater than that of the first cathode layer; ambient light can pass through the second cathode layer and be incident from the light-transmitting region to a side of the anode layer facing away from the pixel layer.

2. The display module of claim 1, wherein the light transmittance of the first cathode layer is 40% -60%, and the light transmittance of the second cathode layer is greater than 80%.

3. The display module of claim 2, wherein the first cathode layer is made of MgAg alloy, and the second cathode layer is made of AZO.

4. The display module of claim 1, wherein the display module comprises a thin film transistor layer disposed on a side of the anode layer facing away from the pixel layer.

5. The display module of claim 4, wherein the thin film transistor layer comprises electrical connection lines, at least a portion of the electrical connection lines being obscured by the anode layer.

6. The display module of claim 5, wherein the cross-sectional area of the first anode unit is larger than the cross-sectional area of the first pixel unit, and the cross-sectional area of the second anode unit is larger than the cross-sectional area of the second pixel unit.

7. The display module according to claim 5, wherein the first anode unit comprises a first region and a second region connected to the first region, the projection of the first region on the second cathode layer is located within the projection of the first cathode unit on the second cathode layer, the projection of the second region on the second cathode layer is located outside the projection of the first cathode unit on the second cathode layer, and at least a part of the electrical connection line is shielded by the second region.

8. The display module according to any one of claims 1 to 7, wherein the display module comprises a polarizer disposed on a side of the second cathode layer facing away from the pixel layer, the polarizer covering the pixel layer.

9. The display module of claim 8, wherein the display module comprises a protective layer disposed on a side of the polarizer facing away from the second cathode layer.

10. The display module according to any one of claims 1-7, wherein the display module comprises a first display area and a second display area, the first display area is connected to the second display area, and the transparent area is located in the first display area.

11. An electronic device comprising a camera module and the display module of any one of claims 1-10, wherein the display module covers the camera module, and the camera module can enter light from the light-transmissive region.

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