CN111477105B - Display modules and electronic equipment - Google Patents

Abstract

The present application provides a display module, comprising a stacked metal layer, a light-emitting element and a display layer, the direction of the light-emitting element pointing to the display layer is the light-emitting direction of the display module; the metal layer includes a stacked layer A first metal layer and a second metal layer are arranged, and the first metal layer and the second metal layer form a metal gap along the light exit direction; the display layer includes a display area and a non-display area, and the non-display area A light-transmitting hole is opened on the area, and the light-transmitting hole is arranged corresponding to the metal slit, so that the external light enters the photosensitive element sequentially through the light-transmitting hole and the metal slit. In the display module provided by the embodiments of the present application, light-transmitting holes are provided in the non-display area of the display layer, and cooperate with the metal gaps of the metal layer to form the incident light path of the external light, so that the photosensitive element disposed under the display module can be Perform light signal sensing.

Description

Display modules and electronic equipment

technical field

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

Background technique

With the development of display technology, the full screen almost occupies a large proportion of the consumer goods market, and has become a hot topic in the development direction. Taking mobile phones as an example, smart phones are more and more widely used and have more and more functions, and have become an essential electronic device in people's daily life.

Although full-screen products have many advantages, with the increase of the screen display area, it also brings many problems to the design of mobile phones. The biggest contradiction is that the increase of the screen ratio will reduce the upper and lower black border areas of the mobile phone, so there is no room for devices such as cameras set in the black border area of the mobile phone. In the related art, a non-display area is generally designed at the top of the screen. For example, solutions such as "Liu Haiping" and "Water Drop Screen" that are widely used now are difficult to achieve a real full-screen display effect.

SUMMARY OF THE INVENTION

On the one hand, the embodiments of the present application provide a display module, which includes a metal layer, a light-emitting element and a display layer arranged in layers, and the direction in which the light-emitting element points to the display layer is the light-emitting direction of the display module; the The metal layer includes stacking a first metal layer and a second metal layer, and the first metal layer and the second metal layer form a metal gap along the light exit direction; the display layer includes a display area and a non-display area, The display area is disposed corresponding to the light-emitting element in the light-emitting direction, and the non-display area is disposed corresponding to a part of the metal gap in the light-emitting direction; the non-display area is provided with a light-transmitting hole, and the The light-transmitting holes are arranged corresponding to the metal slits, so that external light enters the photosensitive element through the light-transmitting holes and the metal slits in sequence.

Another aspect of the embodiments of the present application further provides an electronic device, including the display module described in the preceding embodiments and a light-sensing element; the light-sensing element is located on a side away from the light-emitting surface of the display module, and the light-sensing element is The photosensitive surface of the photosensitive element faces the display module; wherein, the photosensitive element is arranged corresponding to the non-display area, so that the external light enters the photosensitive element through the light-transmitting hole and the metal gap in sequence. .

In the display module and the electronic device provided by the embodiments of the present application, light-transmitting holes are opened in the non-display area of the display layer, and cooperate with the metal gaps of the metal layer to form the incident light path of the external light, so that the light disposed under the display module is The sensing element can perform light signal sensing. In other words, light-transmitting holes are provided in the non-display area of the display layer and cooperate with the metal gaps of the metal layer to provide the light transmittance required by the photosensitive element, so that the photosensitive element can be used normally. The embodiments of the present application provide a solution for realizing the structure of the under-screen camera or the under-screen light-sensing device, which can effectively increase the screen ratio of the entire electronic device.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic structural diagram of an electronic device in some embodiments of the present application;

Fig. 2 is the partial structure disassembly schematic diagram of the electronic device in the embodiment of Fig. 1;

3 is a schematic structural diagram of a display module in some embodiments of the present application;

4 is a schematic structural diagram of a display module in other embodiments of the present application;

5 is a schematic structural diagram of a display module in some embodiments of the present application;

6 is a schematic diagram of a partial structure of a light-emitting element in some embodiments of the present application;

7 is a schematic diagram of a partial plane structure of a display layer in some embodiments of the present application;

8 is a partial structural schematic diagram of a light-transmitting hole and a metal gap in some embodiments of the present application;

9 is a schematic structural diagram of a display module in other embodiments of the present application;

10 is a partial cross-sectional structural schematic diagram of an electronic device in some embodiments of the present application;

FIG. 11 is a partial cross-sectional structural schematic diagram of an electronic device in other embodiments of the present application.

Detailed ways

The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is particularly pointed out that the following examples are only used to illustrate the present application, but do not limit the scope of the present application. Similarly, the following embodiments are only some of the embodiments of the present application, but not all of the embodiments, and all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor a separate or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

"Electronic equipment" (or simply "terminal") as used herein includes, but is not limited to, is configured to be connected via a wired line (eg, via a public switched telephone network (PSTN), digital subscriber line (DSL), digital cable, Direct cable connection, and/or another data connection/network) and/or via (eg, for cellular networks, wireless local area networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters , and/or another communication terminal's) wireless interface to receive/send communication signals. A communication terminal arranged to communicate through a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communication System (PCS) terminals that may combine cellular radio telephones with data processing, fax, and data communication capabilities; may include radio telephones, pagers, Internet/Intranet access , a PDA with a web browser, memo pad, calendar, and/or a global positioning system (GPS) receiver; and conventional laptop and/or palm receivers or other electronic devices including radiotelephone transceivers. A mobile phone is an electronic device equipped with a cellular communication module.

It should be noted that, the electronic device in the embodiments of the present application is mainly aimed at a structure with a full-screen structure, a camera under the screen, or a photosensitive element under the screen. Of course, the electronic device in the embodiment of the present application can also be understood as an electronic device with a light-sensing element or a camera structure under the display screen, such as a mobile phone, the front camera of the mobile phone is hidden under the screen to increase the screen ratio of the whole machine , to achieve the effect of no black edge of the whole machine.

Please refer to FIG. 1 to FIG. 2 in conjunction. FIG. 1 is a schematic structural diagram of the electronic device 100 in some embodiments of the present application, and FIG. 2 is a partial structural disassembly schematic diagram of the electronic device 100 in the embodiment of FIG. 1 . It should be noted that the electronic devices in this application may include mobile phones, tablet computers, notebook computers, wearable devices, and the like. The electronic device 100 may generally include the following structures: a display module 10 , a photosensitive element 20 and a casing 30 . The display module 10 is connected to the casing 30 and is formed together to form an accommodating space 31 , and the photosensitive element 20 is disposed in the accommodating space 31 . The display module 10 has a light emitting surface 101 , and the light emitting surface 101 is disposed on a side of the display module 10 away from the accommodating space 31 . The photosensitive element 20 is located on the side away from the light-emitting surface 101 of the display module, and the photosensitive surface of the photosensitive element 20 faces the display module 10 , so that external light enters the photosensitive surface of the photosensitive element 20 through the display module 10 .

In order to further increase the screen ratio of the whole machine, realize the effect of no black borders in the whole machine, and reduce the space occupied by light-sensitive devices such as cameras on the display screen has become the trend of the future design of the whole machine. The screen ratio of the whole machine is realized without black border effect.

In order to eliminate the reflection of ambient light in the display module in the related art, a polarizer is arranged on the surface of the screen. However, the polarizer will filter approximately 50% of the light emitted by the display module. Then, in order to achieve the same intensity of light output, the display module needs to emit twice as much light, resulting in an increase in the power consumption of the screen.

The applicant found in the research that the use of the color filter structure to replace the polarizer structure will not filter out the light emitted from the display module, which can reduce the power consumption of the screen. The applicant has further researched and found that there is a black opaque material in the color filter structure, which will block a large part of the external light from entering the camera and other light-sensitive devices inside the whole machine through the display module, and cannot realize the camera under the screen or the light under the screen. The structure of the sensor device cannot improve the screen ratio of the whole machine.

In order to solve the above problems, the idea of the technical solution in this embodiment is to set the color filter structure as a partially transparent structure, so that the external light can pass through the display module and enter the camera or light-sensing device inside the whole machine, so as to realize the screen. The structure of the lower camera or the light-sensing device under the screen, thereby increasing the screen ratio of the whole machine.

Please refer to FIG. 3 . FIG. 3 is a partial structural diagram of a display module 10 in some embodiments of the present application. The display module 10 generally includes a stacked metal layer 11 , a light-emitting element 12 and a display layer 13 , that is, the light-emitting element 12 It is disposed between the metal layer 11 and the display layer 13 . The light-emitting element 12 can be an organic light-emitting diode (Organic Light-Emitting Diode, OLED). OLED devices have the advantages of simple structure, self-luminescence, high contrast, fast response speed, and low power consumption. a wide range of applications.

Of course, in other embodiments, the light-emitting element 12 may also be other light-emitting devices, for example, the light-emitting element 12 may be light-emitting devices such as a light-emitting diode (Light Emitting Diode, LED), a cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp, CCFL) and the like .

Further, the light-emitting element 12 is used for normal display of the display module 10 , and the display layer 13 is used for the display and interaction of the display module 10 . The direction in which the light-emitting element 12 points to the display layer 13 is the light-emitting direction of the display module 10 , for example, the L direction shown in FIG. 3 is the light-emitting direction. It can be understood that the light-emitting surface 101 of the display module 10 is the display surface of the display layer 13 , and the non-display surface of the display layer 13 is close to the light-emitting element 12 . Each OLED requires a driver circuit to drive its light emission and multiple traces to transmit signals. The metal layer 11 forms a driving circuit for driving the OLED to emit light and a plurality of wires for transmitting signals.

Specifically, the metal layer 11 generally includes a first metal layer 111 and a second metal layer 112 arranged in layers, and the first metal layer 111 and the second metal layer 112 form a metal gap 1111 along the light exit direction L. In other words, the first metal layer 111 and the second metal layer 112 form the metal slit 1111 in a direction substantially perpendicular to the display module 10 .

It can be understood that the metal layer 11 forms the driving circuit and the wiring for transmitting the signal, which may include multiple metal layers, and the multiple metal layers form metal slits 1111 along the light exit direction L. For example, in other embodiments, please refer to FIG. 4 . FIG. 4 is a schematic structural diagram of the display module 10 in other embodiments of the present application. The metal layer 11 may include a first metal layer 111 and a second metal layer 112 that are stacked in layers. As well as the third metal layer 113 , the first metal layer 111 , the second metal layer 112 and the third metal layer 113 form metal slits 1111 along the light exit direction L.

It should be noted that the terms "first", "second" and "third" in this application are only used for description purposes, and should not be interpreted as indicating or implying relative importance or indicating the indicated technical features. quantity. Thus, a feature defined as "first", "second", "third" may expressly or implicitly include at least one of that feature. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

Further, the display layer 13 includes a display area 131 and a non-display area 132. The display area 131 is disposed in the light-emitting direction L corresponding to the light-emitting element 12, and the non-display area 132 is disposed in the light-emitting direction L corresponding to some metal slits 1111. Specifically, in the direction substantially perpendicular to the display module 10 , the projection of the display area 131 substantially covers the light emitting element 12 or the metal layer 11 , and the projection of the non-display area 132 substantially covers part of the metal gap 1111 . It should be understood that the metal slit 1111 may be formed under the display area 131 or the light emitting element 12 , or may be formed under the non-display area 132 based on the layout of the driving circuit and the transmission signal wiring. When the metal slit 1111 is formed below the non-display area 132 , the projection of the non-display area 132 in a direction substantially perpendicular to the display module 10 covers the metal slit 1111 .

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relationship between the various components under a certain posture (as shown in the drawings). If the specific posture changes, the directional indication also changes accordingly.

Further, please refer to FIG. 5 . FIG. 5 is a schematic structural diagram of the display module 10 in some embodiments of the present application. The non-display area 132 is provided with light-transmitting holes 1321 , and the light-transmitting holes 1321 are arranged corresponding to the metal slits 1111 , so that the The external light enters the photosensitive element 20 through the light-transmitting hole 1321 and the metal slit 1111 in sequence. Specifically, the projection of the non-display area 132 in the direction substantially perpendicular to the display module 10 covers part of the metal slit 1111 , and the light-transmitting hole 1321 corresponds to the part of the metal slit 1111 to form the incident light path i of the external light, thereby making The light sensing element 20 disposed under the display module 10 can perform light signal sensing.

In the display module and the electronic device provided by the embodiments of the present application, light-transmitting holes are opened in the non-display area of the display layer, and cooperate with the metal gaps of the metal layer to form the incident light path of the external light, so that the light disposed under the display module is The sensing element can perform light signal sensing. In other words, light-transmitting holes are provided in the non-display area of the display layer and cooperate with the metal gaps of the metal layer to provide the light transmittance required by the photosensitive element, so that the photosensitive element can be used normally. The embodiments of the present application provide a solution for realizing the structure of the under-screen camera or the under-screen light-sensing device, which can effectively increase the screen ratio of the entire electronic device.

Please refer to FIG. 6 . FIG. 6 is a schematic diagram of a partial structure of the light-emitting element 12 in some embodiments of the present application. The light-emitting element 12 generally includes a first electrode 121 , a second electrode 122 and disposed on the first electrode 121 and the second electrode 122 . The light-emitting layer 123 in between. The direction of the light-emitting layer 123 toward the first electrode 121 is the light-emitting direction L of the display module 10 , and the light-emitting layer 123 is disposed corresponding to the display area 131 for normal display of the display area 131 .

It can be understood that the first electrode 121 may be the cathode of the OLED, and the second electrode 122 may be the anode of the OLED; or, the first electrode 121 may be the anode of the OLED, and the second electrode 122 may be the cathode of the OLED. This is not specifically limited.

Further, the embodiments of the present application are described by taking the first electrode 121 being the cathode of the OLED and the second electrode 122 being the anode of the OLED as an example, that is, the first electrode 121 is close to the display layer 13 and the second electrode 122 is close to the metal layer 11 . The direction in which the second electrode 122 points to the first electrode 121 is substantially parallel to the light emitting direction L of the display module 10 . The first electrode 121 and the second electrode 122 are respectively electrically connected to the metal layer 11 to form the driving and signal transmission of the OLED.

Please refer to FIG. 7 . FIG. 7 is a schematic diagram of a partial plan structure of the display layer 13 in some embodiments of the present application. The display area 131 and the non-display area 132 of the display layer 13 are generally spaced apart. For example, the display area 131 is surrounded by A non-display area 132 is provided, or a display area 131 is provided around the non-display area 132. Of course, the spacing between the display area 131 and the non-display area 132 can also take other forms.

Further, the display area 131 includes a plurality of color units 1311 (R units, G units, B units, etc.) arranged at intervals, and the non-display area 132 includes a plurality of opaque black units 1322 . The black unit 1322 is filled between the plurality of color units 1311 arranged at intervals.

Specifically, the plurality of color units 1311 include at least one first color unit (R unit), at least one second color unit (G unit), and at least one third color unit (B unit). The light-emitting element 12 includes a plurality of sub-pixels, for example, a first sub-pixel (R pixel), a second sub-pixel (G pixel), and a third sub-pixel (B pixel). The plurality of color units 1311 are disposed corresponding to pixels of different colors of the light-emitting element 12 .

Further, the first color unit (R unit) is set corresponding to the first sub-pixel (R pixel), and the emission color of the first sub-pixel (R pixel) is consistent with the color of the first color unit (R unit); the second The color unit (G unit) is set corresponding to the second sub-pixel (G pixel), and the emission color of the second sub-pixel (G pixel) is consistent with the color of the second color unit (G unit); the third color unit (B unit) ) is set corresponding to the third sub-pixel (B pixel), and the emission color of the third sub-pixel (B pixel) is consistent with the color of the third color unit (B unit).

Specifically, in the direction substantially perpendicular to the display module 10, the projection of the first color unit (R unit) covers the first sub-pixel (R pixel), and the projection of the second color unit (G unit) covers the The second sub-pixel (G pixel) and the third color unit (B unit) cover the third sub-pixel (B pixel), so as to realize the normal display of the display module 10 .

Further, the black cells 1322 are filled between the plurality of color cells 1311 arranged at intervals to prevent light leakage and affect the photoelectric characteristics. It can be understood that in the direction substantially perpendicular to the display module 10, the black unit 1322 can be disposed on the plurality of color units 1311, or between the plurality of color units 1311, and can also be disposed on the plurality of color units 1311. Below unit 1311. In this embodiment of the present application, the black unit 1322 is arranged below the plurality of color units 1311 for exemplary illustration, that is, the non-display area 132 is arranged below the display area 131 .

Specifically, the black unit 1322 is made of a black photoresist material to prevent light leakage. Of course, in other embodiments, the black unit 1322 may also be made of a black opaque material, which is not listed one by one in this embodiment of the present application.

It can be understood that the projection of the non-display area 132 in the direction substantially perpendicular to the display module 10 covers part of the metal slit 1111, and the light-transmitting hole 1321 corresponds to the part of the metal slit 1111 to form the incident light path i of the external light, thereby making The light sensing element 20 disposed under the display module 10 can perform light signal sensing. In other words, the light-transmitting hole 1321 is opened in the black unit 1322 , and the area of the light-transmitting hole 1321 is not smaller than that of the metal slit 1111 , so that the outside light incident from the light-transmitting hole 1321 completely covers the metal slit 1111 .

Further, based on the layout of the driving circuit and the transmission signal wiring, the metal slot 1111 may have various shapes, such as a circle, a triangle, a quadrangle, a polygon, and the like. It can be understood that the shape of the light-transmitting hole 1321 generally corresponds to the shape of the metal slit 1111 , such as a circle, a triangle, a quadrangle, a polygon, and the like. In the embodiments of the present application, the shapes of the metal slit 1111 and the light-transmitting hole 1321 are both circular for exemplary illustration.

Further, if the light-transmitting holes 1321 are opened in the black unit, and there are multiple light-transmitting holes 1321 , there may also be a plurality of metal slits 1111 corresponding to the light-transmitting holes 1321 . In the embodiment of the present application, the number of metal slits 1111 and the number of light-transmitting holes 1321 is two for exemplary illustration.

Please refer to FIG. 8. FIG. 8 is a schematic diagram of a partial structure of the light-transmitting holes 1321 (D1, D2) and the metal slits 1111 (d1, d2) in some embodiments of the present application. The light-transmitting holes 1321 of D1 correspond to the metal slits 1111 of d1. The D2 light-transmitting hole 1321 corresponds to the d2 metal slit 1111 . The diameter of the light-transmitting hole 1321 of D1 is larger than the diameter of the metal slit 1111 of d1, and the diameter of the light-transmitting hole 1321 of D2 is not smaller than the diameter of the metal slit 1111 of d2, so that the outside light can completely cover the metal slit 1111 when incident from the light-transmitting hole 1321, and further The photosensitive element 20 can be used normally.

It should be noted that the diameter or area of the D1 light-transmitting hole may be the same as or different from that of the D2 light-transmitting hole, and those skilled in the art can make adaptive adjustments according to the specific structure and layout of the display module 10 .

Further, for different photosensitive elements 20 , the pixel colors of the light sensed by them are generally different to a certain extent. The applicant has further researched and found that when the external light directly enters the photosensitive element 20 from the light-transmitting hole 1321, the photosensitive effect is not good. In addition, due to the existence of the light-transmitting holes 1321, the display module 10 cannot achieve the effect of all-in-one black when the screen is turned off.

Based on the above problems, the applicant found that, based on the pixel color of the light sensing element 20 itself, covering the corresponding color units on the light-transmitting hole 1321 can enhance the integrated black effect of the display module 10 when the screen is turned off.

Please refer to FIG. 9 . FIG. 9 is a schematic structural diagram of the display module 10 in other embodiments of the present application. The light-transmitting hole 1321 is covered with a fourth color unit (W unit), and the color of the fourth color unit (W unit) is It is consistent with the color sensed by the photosensitive element 20 .

Further, the color of the fourth color unit (W unit) is the same as the color of one of the first color unit (R unit), the second color unit (G unit), and the third color unit (B unit), or, the fourth color unit The color of the color unit (W unit) is different from the color in the first color unit (R unit), the second color unit (G unit), and the third color unit (B unit).

For example, when the color of the light sensed by the light sensing element 20 is green light, the fourth color unit and the second color unit (G unit) have the same color. The light of the first sub-pixel (R pixel) and the third sub-pixel (B pixel) of the light-emitting element 12 cannot reach the light-transmitting hole 1321 . In this way, the phenomenon of cross-color can be avoided, and at the same time, the integrated black effect can be enhanced when the display module 10 is turned off.

It can be understood that the fourth color unit completely covers the light-transmitting hole 1321 to avoid light leakage.

In the display module provided by the embodiment of the present application, the light-transmitting hole is provided on the opaque black unit, and at the same time, the light-transmitting hole is covered with a fourth color unit of the same color as that sensed by the photosensitive element, so as to avoid the phenomenon of cross color. At the same time, it can also enhance the all-in-one black effect when the screen is off.

In addition, an embodiment of the present application further provides an electronic device, the electronic device includes a display module, a photosensitive element, and a casing. The display module is connected with the casing and is jointly enclosed to form an accommodating space, and the photosensitive element is arranged in the accommodating space. The photosensitive element is located on the side away from the light-emitting surface of the display module, and the photosensitive surface of the photosensitive element faces the display module, so that external light enters the photosensitive surface of the photosensitive element through the display module. It should be noted that, for the detailed structure of the electronic device, please refer to the relevant descriptions of the foregoing embodiments, which will not be repeated here.

It can be understood that the display module in the embodiment of the present application may be an OLED flexible display screen.

In the electronic device provided by the embodiments of the present application, the light-transmitting holes are opened in the non-display area of the display layer, and cooperate with the metal gaps of the metal layer to form the incident light path of the external light, so that the photosensitive element disposed under the display module can perform Light signal induction. In other words, light-transmitting holes are provided in the non-display area of the display layer and cooperate with the metal gaps of the metal layer to provide the light transmittance required by the photosensitive element, so that the photosensitive element can be used normally. The embodiments of the present application provide a solution for an electronic device to implement a structure of an under-screen camera or an under-screen light-sensing device, which can effectively increase the screen ratio of the entire electronic device.

Further, the photosensitive element includes a camera or a plurality of cameras arranged in an array. Specifically, please refer to FIG. 10 and FIG. 11 in combination. FIG. 10 and FIG. 11 are respectively partial cross-sectional structural schematic diagrams of electronic devices in some embodiments of the present application.

Referring to FIG. 10 , the photosensitive element 20 may include a camera 21 disposed on the side away from the light-emitting surface of the display module 10 ; with reference to FIG. 11 , the photosensitive element 20 may include a plurality of cameras 22 arranged in an array ( FIG. 11 is a sectional view , so only one column is shown), which can be set according to actual needs during specific implementation.

It should be noted that the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes Other steps or units inherent to these processes, methods, products or settings.

The above descriptions are only part of the embodiments of the present application, and are not intended to limit the protection scope of the present application. Any equivalent device or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied to other related The technical field is similarly included in the scope of patent protection of this application.

Claims (10)

1. A display module is characterized by comprising a metal layer, a light-emitting element and a display layer which are arranged in a stacked mode, wherein the direction of the light-emitting element pointing to the display layer is the light-emitting direction of the display module, and the light-emitting element is arranged between the metal layer and the display layer;

the metal layer comprises a first metal layer and a second metal layer which are arranged in a stacked mode to form a driving circuit for driving the light-emitting element to emit light and a routing for transmitting signals, and a metal gap is formed between the first metal layer and the second metal layer along the light emitting direction;

the display layer comprises a display area and a non-display area, the display area is arranged corresponding to the light-emitting element in the light-emitting direction, and the non-display area is arranged corresponding to part of the metal gaps in the light-emitting direction;

a light hole is formed in the non-display area and corresponds to the metal gap, so that external light sequentially passes through the light hole and the metal gap and is incident to the light sensing element;

and a fourth color unit is covered on the light hole, and the color of the fourth color unit is consistent with the color sensed by the light sensing element.

2. The display module according to claim 1, wherein the light-emitting element comprises a first electrode, a second electrode, and a light-emitting layer disposed between the first electrode and the second electrode; the direction of the light emitting layer pointing to the first electrode is the light emitting direction of the display module; the light emitting layer is arranged corresponding to the display area.

3. The display module according to claim 1, wherein the display region comprises a plurality of color cells arranged at intervals, the non-display region comprises a plurality of opaque black cells, and the black cells are filled between the plurality of color cells arranged at intervals; wherein the plurality of color units are arranged corresponding to different color pixels of the light emitting element.

4. The display module according to claim 3, wherein the plurality of color cells comprises at least one first color cell, at least one second color cell, and at least one third color cell; the light-emitting element at least comprises a first sub-pixel, a second sub-pixel and a third sub-pixel; the first color unit is arranged corresponding to the first sub-pixel, and the light emitting color of the first sub-pixel is consistent with the color of the first color unit; the second color unit is arranged corresponding to the second sub-pixel, and the light emitting color of the second sub-pixel is consistent with the color of the second color unit; the third color unit is arranged corresponding to the third sub-pixel, and the light emitting color of the third sub-pixel is consistent with the color of the third color unit.

5. The display module according to claim 4, wherein the color of the fourth color unit is the same as one of the first color unit, the second color unit and the third color unit.

6. The display module of claim 1, wherein the fourth color cell completely covers the light hole.

7. The display module of claim 3, wherein the black cell is made of a black photoresist material.

8. The display module according to claim 3, wherein the light hole is opened in the black cell, and an area of the light hole is not smaller than an area of the metal slit, so that the external light is incident from the light hole and completely covers the metal slit.

9. An electronic device, comprising the display module of any one of claims 1-8 and a light-sensing element; the light sensing element is positioned on one side departing from the light emitting surface of the display module, and the light sensing surface of the light sensing element faces the display module; the light sensing element is arranged corresponding to the non-display area, so that external light sequentially passes through the light holes and the metal gaps and enters the light sensing element.

10. The electronic device of claim 9, wherein the light-sensing element comprises a camera or a plurality of cameras arranged in an array.

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