Display module and electronic equipment

Abstract

The embodiment of the invention provides a display module and electronic equipment. The display module comprises a thin film transistor layer, a display function layer and a touch function layer which are sequentially stacked. The display function layer comprises a pixel limiting layer, a plurality of light-emitting pixels and a cathode wire. The pixel defining layer comprises a plurality of pixel openings, and each light-emitting pixel is arranged in one pixel opening. The light-emitting pixels are used for emitting light under the driving of the thin film transistor layer. The cathode wire, the pixel limiting layer and the thin film transistor layer are arranged in a stacked mode. And the cathode wire is provided with a light-transmitting hole. A light-transmitting shielding layer is arranged between the cathode wire and the thin film transistor layer, and the overlapping area of the orthographic projection of the light-transmitting open hole on the thin film transistor layer and the orthographic projection of the light-transmitting shielding layer on the thin film transistor layer is not smaller than the orthographic projection area of the light-transmitting open hole. The light-transmitting shielding layer is used for shielding electric signals of the thin film transistor layer so as to reduce interference of the electric signals of the thin film transistor layer on the touch control function layer, and therefore the touch control effect of the touch control function layer is improved.

Description

Technical Field

[0001] This application relates to the field of displays, and particularly to a display module and an electronic device. Background Art

[0002] Organic Light-Emitting Diode (OLED) has the advantages of self-luminescence, fast response, wide viewing angle, high brightness, vivid color, thin and light compared with Liquid Crystal Display (LCD). In a display module, in order to ensure a certain light transmittance in the Active Area (AA) of the OLED, openings are made in the cathode traces to leave blanks, which may cause the electrical signals of the thin film transistor layer to interfere with the touch function layer and affect the touch effect of the touch function layer. Summary of the Invention

[0003] Embodiments of this application provide a display module and an electronic device that can improve the touch effect.

[0004] In a first aspect, embodiments of this application provide a display module, including a thin film transistor layer, a display function layer, and a touch function layer that are sequentially stacked. The display function layer includes a pixel defining layer, a plurality of light-emitting pixels, and cathode traces. The pixel defining layer includes a plurality of pixel openings, and each light-emitting pixel is correspondingly disposed in one pixel opening. Each light-emitting pixel is used to emit light under the drive of the thin film transistor layer; the cathode traces, the pixel defining layer, and the thin film transistor layer are stacked, and light-transmitting openings are provided on the cathode traces; wherein, a light-transmitting shielding layer is provided between the cathode traces and the thin film transistor layer, and the overlapping area of the positive projection of the light-transmitting opening on the thin film transistor layer and the positive projection of the light-transmitting shielding layer on the thin film transistor layer is not less than the positive projection area of the light-transmitting opening.

[0005] In the display module provided by this application, a light-transmitting shielding layer is provided between the cathode traces and the thin film transistor layer. The light-transmitting shielding layer is used to shield the electrical signals of the thin film transistor layer to reduce the signal interference of the thin film transistor layer on the touch function layer, thereby being able to improve the touch effect of the touch function layer.

[0006] According to the first aspect, in a possible implementation manner of this application, a receiving hole is provided on a side of the pixel defining layer facing the thin film transistor layer, and the light-transmitting shielding layer is received in the receiving hole.

[0007] In this possible implementation manner, since the light-transmitting shielding layer is directly disposed in the pixel defining layer, the distance between the light-transmitting shielding layer and the first touch trace in the stacking direction of the display function layer and the touch function layer is shortened, which is beneficial to improving the shielding effect of the light-transmitting shielding layer on the electrical signals of the thin film transistor layer.

[0008] According to the first aspect, in a possible implementation of the present application, along the stacking direction of the thin-film transistor layer, the display function layer, and the touch control function layer, the cathode trace, the light-transmitting shielding layer, and the pixel defining layer are stacked in sequence.

[0009] In this possible implementation, the cathode trace, the light-transmitting shielding layer, and the pixel defining layer are stacked in sequence. In this way, the distance between the light-transmitting shielding layer and the touch control function layer in the stacking direction of the display function layer and the touch control function layer is shortened, which is beneficial to improving the shielding effect of the light-transmitting shielding layer on the electrical signals of the thin-film transistor layer.

[0010] According to the first aspect, in a possible implementation of the present application, the display function layer further includes a light-transmitting protective layer, and the cathode trace, the light-transmitting protective layer, the light-transmitting shielding layer, and the pixel defining layer are stacked in sequence.

[0011] In this possible implementation, during the process of manufacturing the display module, after the light-transmitting shielding layer is etched, a light-transmitting protective layer is formed on the side of the light-transmitting shielding layer away from the thin-film transistor layer, and then the cathode trace is formed through a patterning process. In this way, the light-transmitting protective layer can protect the light-transmitting shielding layer during the process of forming the cathode trace through the patterning process.

[0012] According to the first aspect, in a possible implementation of the present application, the display function layer further includes a light-transmitting protective layer, the light-transmitting protective layer is received in the light-transmitting opening, and along the stacking direction of the thin-film transistor layer, the display function layer, and the touch control function layer, the light-transmitting protective layer, the light-transmitting shielding layer, and the pixel defining layer are stacked in sequence.

[0013] In this possible implementation, during the process of manufacturing the display module, after the light-transmitting shielding layer is etched, the light-transmitting protective layer can be formed through a patterning process, and the light-transmitting protective layer covers the side of the light-transmitting shielding layer away from the thin-film transistor layer. Then the cathode trace is formed through a patterning process, and the light-transmitting protective layer is received in the light-transmitting opening. The light-transmitting protective layer can protect the light-transmitting shielding layer during the process of forming the cathode trace.

[0014] According to the first aspect, in a possible implementation of the present application, the cathode trace is electrically connected to the light-transmitting shielding layer.

[0015] In this possible implementation, since the light-transmitting shielding layer is electrically connected to the cathode trace, the shielding effect of the light-transmitting shielding layer on the electrical signals of the thin-film transistor layer can be enhanced.

[0016] According to the first aspect, in a possible implementation of the present application, the display module further includes a packaging layer, and the packaging layer is filled in the light-transmitting opening.

[0017] In this possible implementation, the packaging layer can package the light-emitting pixels, avoid the corrosion of the light-emitting pixels such as the light-emitting layer by water and oxygen, and improve the service life of the light-emitting pixels.

[0018] According to the first aspect, in a possible implementation of the present application, the orthographic projection of the light-transmitting shielding layer on the thin-film transistor layer has an outward expansion length range of [0, 5 μm] in all directions relative to the orthographic projection of the light-transmitting opening on the thin-film transistor layer.

[0019] In this possible implementation, if the thickness of the light-transmitting shielding layer is too thick, it is easy to cause an increase in the thickness of the display module. If the thickness of the light-transmitting shielding layer is too thin, the shielding effect is easily affected. To avoid affecting the thickness of the display module and achieve a better shielding effect, the thickness range of the light-transmitting shielding layer is [0.05 μm, 0.5 μm].

[0020] According to the first aspect, in a possible implementation of the present application, the number of the light-transmitting openings is multiple; the touch function layer includes a plurality of first touch traces, each of the first touch traces is arranged corresponding to one of the light-transmitting openings, the first touch traces are used for transmitting touch signals, the orthographic projection of each of the light-transmitting openings on the thin-film transistor layer is symmetric about the orthographic projection of the corresponding first touch trace on the thin-film transistor layer; the orthographic projections of every two adjacent light-emitting pixels on the thin-film transistor layer are symmetric about the orthographic projection of the corresponding first touch trace on the thin-film transistor layer.

[0021] In this possible implementation, the first touch traces are made of metal, and metal can reflect light. Since the orthographic projection of the light-transmitting opening on the thin-film transistor layer is symmetric about the orthographic projection of the first touch trace on the thin-film transistor layer, the color shift caused by the light reflection of the first touch trace on two adjacent light-emitting pixels can be reduced, and the deterioration of the color shift symmetry at a large viewing angle is alleviated, thereby improving the display effect of the display module.

[0022] According to the first aspect, in a possible implementation of the present application, the thin-film transistor layer includes a plurality of thin-film transistors, each of the thin-film transistors includes an active layer, a gate, a source, a drain, and a planarization layer, the source and the drain are both in contact with the active layer, the drain is electrically connected to the light-emitting pixel, the planarization layer covers the source and the drain, and the transparent shielding layer is located between the planarization layer and the cathode trace.

[0023] In a possible implementation manner of this species, the transparent shielding layer is located between the planarization layer and the cathode trace, shortening the distance between the transparent shielding layer and the touch function layer, thereby further improving the touch effect of the touch function layer.

[0024] In a second aspect, an embodiment of the present application provides an electronic device, which includes a housing and the display module according to the first aspect, and the display module is disposed on the housing. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of an electronic device provided by some embodiments of the present application;

[0026] Figure 2 is a cross-sectional schematic view of the electronic device provided by some embodiments of the present application;

[0027] Figure 3A is a schematic stacked structure diagram of the display module provided by some embodiments of the present application;

[0028] Figure 3B is a schematic stacked structure diagram of the display module including a substrate provided by some embodiments of the present application;

[0029] Figure 4 is a schematic plan view of the display module provided by some embodiments of the present application;

[0030] Figure 5A is along Figure 4 the line I-I to obtain a cross-sectional view;

[0031] Figure 5B is a schematic diagram of the orthographic projection positions of the light-transmitting opening, the light-transmitting shielding layer, the first touch trace, and the light-emitting pixel on the thin-film transistor layer;

[0032] Figure 6 is a cross-sectional view of the display module removing some structures provided by some embodiments of the present application;

[0033] Figure 7 is a cross-sectional view of the display module removing some structures provided by some embodiments of the present application;

[0034] Figure 8 is a cross-sectional view of the display module removing some structures provided by some embodiments of the present application;

[0035] Figure 9 is a schematic stacked structure diagram of the display module provided by some embodiments of the present application;

[0036] Figure 10 is a cross-sectional view of the display module removing some structures provided by some embodiments of the present application. Detailed implementation manners

[0037] Figure 1 is a schematic structural diagram of an electronic device 100 provided by some embodiments of the present application.

[0038] The electronic device involved in the embodiments of the present application may be a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing devices connected to a wireless modem. The electronic device includes, but is not limited to, a cellular phone, a television, a smart phone, a personal digital assistant (PDA) computer, a digital camera, a tablet computer, a laptop computer, a smart watch, a smart wristband, a vehicle-mounted computer, a desktop computer, a calculator, and other electronic devices with a display function. The specific form of the electronic device is not particularly limited in the embodiments of the present application, as long as the electronic device has a display function. For the convenience of description and understanding below, the electronic device is taken as a terminal device, such as a mobile phone, as an example for illustration.

[0039] It should be understood that Figure 1 only some components included in the electronic device 100 are schematically shown, and the shapes, sizes, and structures of these components are not limited by Figure 1 In some embodiments of the present application, the electronic device 100 may further include more or fewer components than those shown in the figure, which is not limited in the embodiments of the present application. In other embodiments, the types of the electronic device 100 are different, and the components included in the electronic device 100 are different. The electronic device structure provided in the embodiments of the present application is only an exemplary illustration.

[0040] Referring to Figure 1 , the electronic device 100 may include a display module (panel, DP) 01 and a housing 02.

[0041] The housing 02 forms an accommodation space for accommodating various components of the electronic device 100. The housing 02 can also play a role in protecting the electronic device 100 and supporting the whole machine.

[0042] The display module 01 is used for displaying images. The display module 01 is disposed in the accommodation space formed by the housing 02 and is connected to the housing 02.

[0043] In some embodiments of the present application, as Figure 2As shown, the electronic device 100 may further include a cover plate 03. The cover plate 03 is stacked with the display module 01, and the cover plate 03 is located on the outermost side of the electronic device 100. The cover plate 03 is used to protect the display module 01. An ink decoration layer may be provided on the cover plate 03.

[0044] In the embodiment of the present application, the display module 01 is an organic light emitting diode (OLED) display module, and the OLED display module can achieve self-luminescence without a backlight source.

[0045] In some embodiments of the present application, the display module 01 may include a display area and a non-display area provided around the display area. Please refer to Figure 3A , the display module 01 in the display area includes a display function layer 103 and a touch function layer 107 stacked. Assume that the stacking direction of the display function layer 103 and the touch function layer 107 is the first direction Z. The display function layer 103 is used to display image information. The touch function layer 107 is used for users to perform touch operations. In some possible embodiments of the present application, the entire area of the display module 01 may be a display area.

[0046] The display function layer 103 includes a thin film transistor layer 30, a pixel defining layer 40, a plurality of light-emitting pixels 60, and a cathode trace 70. The cathode trace 70, the pixel defining layer 40, and the thin film transistor layer 30 are stacked in sequence. The pixel defining layer 40 forms a plurality of pixel openings 42 arranged in an array for setting the light-emitting pixels 60. In some embodiments of the present application, the number of pixel defining layers 40 may be multiple, and a pixel opening 42 is formed between two adjacent pixel defining layers 40. Each light-emitting pixel 60 is located in a pixel opening 42 and is used for emitting light.

[0047] Please refer to Figure 3B , the display function layer 103 may further include a substrate 20. The substrate 20 can serve as the basis of the display module 01 and is used to carry each functional layer of the display module 01. The substrate 20 can be a glass substrate or a flexible substrate. When the substrate 20 is a flexible substrate, the display module 01 can be bent. The thin film transistor layer 30 can be disposed on the substrate 20, that is, the cathode trace 70, the pixel defining layer 40, the thin film transistor layer 30, and the substrate 20 are stacked in sequence.

[0048] The thin film transistor layer 30 includes a plurality of thin film transistors, and the thin film transistors are used to transmit electrical signals to the light-emitting pixels 60 to drive the light-emitting pixels 60 to emit light.

[0049] In some embodiments of the present application, the thin film transistor includes an active layer 31, a gate 32, a source 33, a drain 34, and a planarization layer (PLD) 35. The active layer 31 is disposed on a substrate 20. Both the source 33 and the drain 34 are in contact with the active layer 31. The drain 34 is used for electrically connecting to a light-emitting pixel 60. The active layer 31 can be made of silicon (Si), for example, amorphous silicon (a-Si) or polycrystalline silicon (p-Si). In some embodiments, the active layer 31 can be made of, for example, germanium (Ge), gallium phosphide (GaP), gallium arsenide (GaAs), or aluminum arsenide (AlAs). In some embodiments, the active layer 31 can be a silicon semiconductor layer formed by diffusing an n-type impurity into a silicon-on-insulator (SOI) substrate at a low concentration. In some embodiments, the active layer 31 can be formed by doping a part of a-Si with a p-type impurity or an n-type impurity.

[0050] The material of the gate 32 can include a metal material or an alloy material, such as a single-layer or multi-layer structure of metals formed by molybdenum, aluminum, titanium, etc. For example, the multi-layer structure is a multi-metal stack (such as a three-layer metal stack of titanium, aluminum, and titanium (Ti / Al / Ti)).

[0051] The material of the source 33 and the drain 34 can include a metal material or an alloy material, such as a single-layer or multi-layer structure of metals formed by molybdenum, aluminum, titanium, etc. For example, the multi-layer structure is a multi-metal stack (such as a three-layer metal stack of titanium, aluminum, and titanium (Ti / Al / Ti)).

[0052] The planarization layer 35 can include an organic insulating material. Specifically, an organic material such as polyimide (PI) can be taken as an example, and it can perform a surface planarization function. The planarization layer 35 covers the source 33 and the drain 34.

[0053] The embodiments of the present application do not specifically limit the materials of the respective functional layers.

[0054] In some embodiments of the present application, the present application does not limit the structure of the thin film transistor.

[0055] The plurality of light-emitting pixels 60 can include at least three types of pixels with different colors. For example, taking three types of pixels including a red pixel (R), a green pixel (G), and a blue pixel (B) as an example, but not limited thereto, the plurality of light-emitting pixels 60 can also include other pixels with different colors.

[0056] The light-emitting pixel 60 may include a micro-light-emitting diode (micro-LED), or may include an organic light-emitting diode (OLED), or may also include other self-luminous elements. When the light-emitting pixel 60 includes an organic light-emitting diode, the light-emitting pixel 60 may include an anode 61, a cathode 62, and an organic light-emitting material layer 63 located between the anode 61 and the cathode 62. The anode 61 penetrates through the planarization layer 35 and is electrically connected to the drain 34, and the cathode 62 is electrically connected to the cathode trace 70, so that the electrical signal of the thin-film transistor layer 30 is input to the light-emitting pixel 60 to drive the light-emitting pixel 60 to emit light.

[0057] In addition, a hole transport layer 64 may be included between the anode 61 and the organic light-emitting material layer 63, and an electron transport layer 65 may be included between the cathode 62 and the organic light-emitting material layer 63. Under the action of an electric field, holes generated by the anode 61 and electrons generated by the cathode 62 are respectively injected into the hole transport layer 64 and the electron transport layer 65 and migrate to the organic light-emitting material layer 63. When the holes and electrons meet in the organic light-emitting material layer 63, energy excitons are generated, thereby exciting the light-emitting molecules in the organic light-emitting material layer 63 to finally generate visible light.

[0058] Please refer to Figure 4 , a plurality of light-emitting pixels 60 are arranged in an array. In some embodiments of the present application, for example, along the second direction X, a plurality of light-emitting pixels 60 of the same color are arranged in sequence. Along the third direction Y, a plurality of light-emitting pixels 60 may be arranged in the order of R, G, B, R, G, B... Or, a plurality of light-emitting pixels 60 may be arranged in the order of R, B, G, R, B, G,.... The order of each light-emitting pixel 60 can be flexibly adjusted. The touch function layer 107 includes a plurality of first touch traces 91 and a plurality of second touch traces 93, and the plurality of first touch traces 91 and the plurality of second touch traces 93 are used for users to perform touch operations. Figure 4Only three first touch traces 91 are shown exemplarily. A plurality of first touch traces 91 are arranged along the second direction X, and a plurality of second touch traces 93 are arranged along the third direction Y. The plurality of first touch traces 91 and the plurality of second touch traces 93 enclose a plurality of touch areas. In some embodiments of the present application, each touch area corresponds to a light-emitting pixel 60. The present application does not limit that one touch area corresponds to one light-emitting pixel 60. One touch area may also correspond to a plurality of light-emitting pixels 60. The present application does not limit the color arrangement manner and sequence of the light-emitting pixels 60. For example, along the second direction X, the plurality of light-emitting pixels 60 may be arranged in the order of R, G, B, R, G, B... or the plurality of light-emitting pixels 60 may be arranged in the order of R, B, G, R, B, G... The order of each light-emitting pixel 60 can be flexibly adjusted; along the third direction Y, the plurality of light-emitting pixels 60 of the same color are arranged.

[0059] Please refer to Figure 3B and a window 71 penetrating the cathode trace 70 along the first direction Z and a light-transmitting opening 72 are provided on the cathode trace 70. The position of the window 71 corresponds to the position of the pixel opening 42, and the window 71 is used to expose the light-emitting pixel 60. The light-transmitting opening 72 is used for light transmission to facilitate the operation of some light sensor devices in the display module 01. For example, the display module 01 may further include a first light sensor device and a second light sensor device. The first light sensor device is used to collect biometric image information, and the biometric image information includes fingerprint features, palmprint features, blood oxygen concentration, vein features, dynamic information, face features, etc. The second light sensor device is used to sense ambient light.

[0060] Please refer to Figure 3B and Figure 4 The number of the light-transmitting openings 72 is multiple. The multiple light-transmitting openings 72 are arranged in an array. Please refer to Figure 5A and Figure 5B In the second direction X, there is a positive projection 72A of a light-transmitting opening 72 on the thin-film transistor layer 30 between the positive projections 60A of every two light-emitting pixels 60 on the thin-film transistor layer 30.

[0061] Generally, light-transmitting openings are provided on the cathode trace for light transmission. There is no metal in the light-transmitting openings. In this way, the electrical signal of the thin-film transistor layer may interfere with the touch function layer and affect the touch effect of the touch function layer.

[0062] Based on this, the display functional layer 103 further includes a plurality of light-transmitting shielding layers 74. Each light-transmitting shielding layer 74 is located between the pixel defining layer 40 and the planarization layer 35. The cathode trace 70, the pixel defining layer 40, and the planarization layer 35 are sequentially stacked. The overlapping area of the orthographic projection 72A of the light-transmitting opening 72 on the thin film transistor layer 30 and the orthographic projection 74A of the light-transmitting shielding layer 74 on the thin film transistor layer 30 is not less than the area of the orthographic projection 72A of the light-transmitting opening 72. The orthographic projection 72A of the light-transmitting opening 72 on the planarization layer 35 is located on the orthographic projection 74A of the light-transmitting shielding layer 74 on the planarization layer 35. The orthographic projection 74A of the light-transmitting shielding layer 74 is Figure 5B exemplarily shown as a gray area in []. The light-transmitting shielding layer 74 is used to shield the electrical signals of the thin film transistor layer 30 to reduce the interference of the electrical signals of the thin film transistor layer 30 on the first touch trace 91 and the second touch trace 93, thereby improving the touch performance.

[0063] In some embodiments of the present application, the orthographic projection 74A of the light-transmitting shielding layer 74 on the thin film transistor layer 30 at least partially protrudes from the orthographic projection 72A of the light-transmitting opening 72 on the thin film transistor layer 30 to ensure that the light-transmitting shielding layer can shield the light-transmitting opening 72 in the direction perpendicular to the first direction Z. The outward expansion length range of the orthographic projection 74A of the light-transmitting shielding layer 74 on the thin film transistor layer 30 relative to the orthographic projection 72A of the light-transmitting opening 72 on the thin film transistor layer 30 in all directions is [0, 5um]. In other words, the length range of the orthographic projection 74A of the light-transmitting shielding layer 74 on the thin film transistor layer 30 protruding from the orthographic projection 72A of the light-transmitting opening 72 on the thin film transistor layer 30 is [0, 5um] to obtain a better shielding effect. The present application does not limit the length range of the orthographic projection 74A of the light-transmitting shielding layer 74 on the thin film transistor layer 30 protruding from the orthographic projection 72A of the light-transmitting opening 72 on the thin film transistor layer 30.

[0064] In the first direction Z, if the thickness of the light-transmitting shielding layer 74 is too thick, it is easy to cause an impact on the thickness of the display module 01. If the thickness of the light-transmitting shielding layer 74 is too thin, the shielding effect is likely to be affected. To avoid affecting the thickness of the display module 01 and achieve a better shielding effect, the thickness range of the light-transmitting shielding layer 74 is [0.05um, 0.5um]. The present application does not limit the thickness range of the light-transmitting shielding layer 74.

[0065] In some embodiments of the present application, a receiving hole 44 is provided on one side of the pixel defining layer 40 facing the planarization layer 35. The light-transmitting shielding layer 74 is received in the receiving hole 44. Since the light-transmitting shielding layer 74 is directly disposed in the pixel defining layer 40, the distance between the light-transmitting shielding layer 74 and the first touch trace 91 in the first direction Z is shortened, which is beneficial to improving the shielding effect of the light-transmitting shielding layer 74 on the electrical signals of the thin film transistor layer 30.

[0066] Since a light-transmitting shielding layer 74 is provided corresponding to the light-transmitting opening 72, the first touch trace 91 does not need to be arranged avoiding the light-transmitting opening 72, and the first touch trace 91 can be arranged directly above the side of the light-transmitting opening 72 facing away from the thin-film transistor layer 30. In some embodiments of the present application, each first touch trace 91 is arranged corresponding to a light-transmitting opening 72. Please refer to Figure 5A and Figure 5B . The orthographic projection 91A of the first touch trace 91 on the thin-film transistor layer 30 and the orthographic projection 72A of the light-transmitting opening 72 on the thin-film transistor layer 30 partially overlap. The orthographic projection 72A of each light-transmitting opening 72 on the thin-film transistor layer 30 is symmetric about the orthographic projection 91A of the corresponding first touch trace 91 on the thin-film transistor layer 30, and the orthographic projections 60A of every two adjacent light-emitting pixels 60 on the thin-film transistor layer 30 are symmetric about the orthographic projection 91A of the corresponding first touch trace 91 on the thin-film transistor layer 30. The orthographic projection 91A of the first touch trace 91 on the thin-film transistor layer 30 is located on the orthographic projection of the light-transmitting shielding layer 74 on the thin-film transistor layer 30. The first touch trace 91 is made of metal, and metal can reflect light. Since the orthographic projection 72A of the light-transmitting opening 72 on the thin-film transistor layer 30 is symmetric about the orthographic projection 91A of the first touch trace 91 on the thin-film transistor layer 30, compared with the method of arranging the first touch trace avoiding the light-transmitting opening, it can reduce the color shift caused by the light reflection of the first touch trace 91 on two adjacent light-emitting pixels 60, and alleviate the deterioration of the large viewing angle color shift symmetry.

[0067] In some embodiments of the present application, the orthographic projection 72A of each light-transmitting opening 72 on the thin-film transistor layer 30 may not be symmetric about the orthographic projection 91A of the corresponding first touch trace 91 on the thin-film transistor layer 30, and the orthographic projections 60A of every two adjacent light-emitting pixels 60 on the thin-film transistor layer 30 may not be symmetric about the orthographic projection 91A of the corresponding first touch trace 91 on the thin-film transistor layer 30.

[0068] In some embodiments of the present application, as Figure 6 shown, the light-transmitting shielding layer 74 can also be located between the cathode trace 70 and the pixel defining layer 40. The cathode trace 70, the light-transmitting shielding layer 74, and the pixel defining layer 40 are stacked in sequence. In this way, the distance between the light-transmitting shielding layer 74 and the touch function layer 107 (as Figure 3B shown) in the display function layer 103 (as Figure 3BThe distance in the stacking direction of the touch function layer 107 is beneficial to improving the shielding effect of the light-transmitting shielding layer 74 on the electrical signals of the thin film transistor layer 30. The light-transmitting shielding layer 74 is electrically connected to the cathode trace 70. In this way, the light-transmitting shielding layer 74 and the cathode trace 70 can form a uniform electric field over the entire surface, reducing the signal interference of the thin film transistor layer 30 on the touch function layer 107 and being beneficial to strengthening the shielding effect of the light-transmitting shielding layer 74 on the electrical signals of the thin film transistor layer 30.

[0069] In some embodiments of the present application, such as Figure 7 shown, the display function layer 103 further includes a light-transmitting protection layer 76. The cathode trace 70, the light-transmitting protection layer 76, the light-transmitting shielding layer 74, and the pixel defining layer 40 are sequentially stacked. During the preparation of the display module 01, after the light-transmitting shielding layer 74 is etched, a light-transmitting protection layer 76 is formed on the side of the light-transmitting shielding layer 74 away from the planarization layer 35, and then the cathode trace 70 is formed through a patterning process. Since the light-transmitting protection layer 76 is formed on the side of the light-transmitting shielding layer 74 away from the planarization layer 35, the light-transmitting protection layer 76 can protect the light-transmitting shielding layer 74 during the process of forming the cathode trace 70 through the patterning process. The material of the light-transmitting protection layer 76 can be selected as SiN or SiO.

[0070] In some embodiments of the present application, such as Figure 8 shown, the display function layer 103 further includes a light-transmitting protection layer 76. The light-transmitting protection layer 76 is provided with a connection hole 762 penetrating through the light-transmitting protection layer 76 along the first direction Z. The cathode trace 70, the light-transmitting protection layer 76, the light-transmitting shielding layer 74, and the pixel defining layer 40 are sequentially stacked. A part of the cathode trace 70 penetrates through the connection hole 762 and is connected to the light-transmitting shielding layer 74. During the preparation of the display module 01, after the light-transmitting shielding layer 74 is etched, the light-transmitting protection layer 76 can be formed through a patterning process. The light-transmitting protection layer 76 covers the side of the light-transmitting shielding layer 74 away from the planarization layer 35, and the light-transmitting protection layer 76 is formed with the connection hole 762. Then the cathode trace 70 is formed through a patterning process. A part of the cathode trace 70 is filled in the connection hole 762 and is connected to the light-transmitting shielding layer 74. The light-transmitting protection layer 76 can protect the light-transmitting shielding layer 74 during the process of forming the cathode trace 70. In addition, since the light-transmitting shielding layer 74 is electrically connected to the cathode trace 70, the shielding effect of the light-transmitting shielding layer 74 on the electrical signals of the thin film transistor layer 30 can be strengthened. The present application does not limit the electrical connection manner between the cathode trace 70 and the light-transmitting shielding layer 74. For example, at least one of the cathode trace 70 and the light-transmitting shielding layer 74 penetrates through the connection hole 762, and the cathode trace 70 and the light-transmitting shielding layer 74 can be electrically connected.

[0071] In some possible implementation manners, such as Figure 9As shown, the display module 01 further includes a packaging layer 106 for packaging the light-emitting pixels 60. The packaging layer 106, the cathode trace 70, and the pixel defining layer 40 are stacked. The touch function layer 107 is located on the side of the packaging layer 106 away from the substrate 20. The touch function layer 107 is used to provide a touch operation function for the user. The packaging layer 106 includes a first inorganic packaging layer (CVD1) 82, an organic packaging layer (IJP) 84, and a second inorganic packaging layer (CVD2) 86 that are stacked, which can effectively prevent water and oxygen from corroding the light-emitting pixels 60 (such as the corrosion of the light-emitting layer), and improve the lifespan of the light-emitting pixels 60. The first inorganic packaging layer 82 covers the side of the light-emitting pixels 60 facing away from the substrate 20, and covers the side of the cathode trace 70 away from the thin-film transistor layer 30. The materials of the first inorganic packaging layer (CVD1) 82 and the second inorganic packaging layer (CVD2) 86 can be selected from SiN or SiO. The first inorganic packaging layer (CVD1) 82 is filled in the light-transmitting opening 72. The structure of the packaging layer 106 is not limited in this application, and the packaging layer 106 is partially filled in the light-transmitting opening 72.

[0072] In some possible implementation manners, as Figure 10 shown, the display function layer 103 further includes a light-transmitting protective layer 76 received in the light-transmitting opening 72. The light-transmitting protective layer 76, the light-transmitting shielding layer 74, and the pixel defining layer 40 are stacked in sequence. The material of the light-transmitting protective layer 76 can be selected from SiN or SiO. The material of the light-transmitting protective layer 76 can be the same as or different from the material of the first inorganic packaging layer 82. During the process of manufacturing the display module 01, after the light-transmitting shielding layer 74 is etched, the light-transmitting protective layer 76 can be formed through a patterning process. The light-transmitting protective layer 76 covers the side of the light-transmitting shielding layer 74 away from the planarization layer 35. Then, the cathode trace 70 is formed through a patterning process, and the light-transmitting protective layer 76 is received in the light-transmitting opening 72. After that, the first inorganic packaging layer 82 is deposited. The first inorganic packaging layer 82 fills the remaining part in the light-transmitting opening 72. The light-transmitting protective layer 76 can protect the light-transmitting shielding layer 74 during the process of forming the cathode trace 70. In addition, since the light-transmitting shielding layer 74 is electrically connected to the cathode trace 70, it can enhance the shielding effect of the light-transmitting shielding layer 74 on the electrical signals of the thin-film transistor layer 30.

[0073] It should be understood that expressions such as "including" and "may include" that can be used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit the existence of one or more additional functions, operations, and constituent elements. In this application, terms such as "including" and / or "having" can be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or a combination thereof, but cannot be interpreted as excluding the existence or the possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or a combination thereof.

[0074] In addition, in the present application, the expression "and / or" includes any and all combinations of the associated listed words. For example, the expression "A and / or B" may include A, may include B, or may include both A and B.

[0075] In the present application, expressions including ordinal numbers such as "first" and "second" may modify each element. However, such elements are not limited by the above expressions. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used to distinguish one element from other elements. For example, the first user equipment and the second user equipment indicate different user equipments, although both the first user equipment and the second user equipment are user equipments. Similarly, without departing from the scope of the present application, the first element may be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0076] When a component is referred to as being "connected" or "accessed" to another component, it should be understood that: the component is not only directly connected to or accessed to the other component, but there may also be another component between the component and the other component. On the other hand, when a component is referred to as being "directly connected" or "directly accessed" to another component, it should be understood that there is no component between them.

[0077] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A display module, characterized in that, It includes a thin-film transistor layer, a display function layer, and a touch function layer that are stacked in sequence. The display function layer includes a pixel defining layer, a plurality of light-emitting pixels, and a cathode trace. The pixel defining layer includes a plurality of pixel openings, and each light-emitting pixel is correspondingly disposed in one pixel opening. Each light-emitting pixel is used to emit light under the drive of the thin-film transistor layer. The cathode trace, the pixel defining layer, and the thin-film transistor layer are stacked, and a light-transmitting opening is provided on the cathode trace. Wherein, a light-transmitting shielding layer is provided between the cathode trace and the thin-film transistor layer, and the overlapping area of the positive projection of the light-transmitting opening on the thin-film transistor layer and the positive projection of the light-transmitting shielding layer on the thin-film transistor layer is not less than the positive projection area of the light-transmitting opening.

2. The display module according to claim 1, wherein A receiving hole is provided on the side of the pixel defining layer facing the thin-film transistor layer, and the light-transmitting shielding layer is received in the receiving hole.

3. The display module according to claim 1, wherein Along the stacking direction of the thin-film transistor layer, the display function layer, and the touch function layer, the cathode trace, the light-transmitting shielding layer, and the pixel defining layer are stacked in sequence.

4. The display module according to claim 3, wherein The display function layer further includes a light-transmitting protective layer, and the cathode trace, the light-transmitting protective layer, the light-transmitting shielding layer, and the pixel defining layer are stacked in sequence.

5. The display module according to claim 3, wherein The display function layer further includes a light-transmitting protective layer, the light-transmitting protective layer is received in the light-transmitting opening, and along the stacking direction of the thin-film transistor layer, the display function layer, and the touch function layer, the light-transmitting protective layer, the light-transmitting shielding layer, and the pixel defining layer are stacked in sequence.

6. The display module according to any one of claims 1-5, characterized in that, The cathode trace is electrically connected to the light-transmitting shielding layer.

7. The display module according to any one of claims 1-6, characterized in that, The display module further includes a first inorganic encapsulation layer, and the first inorganic encapsulation layer is filled in the light-transmitting opening.

8. The display module according to any one of claims 1-7, characterized in that The outer expansion length range of the positive projection of the light-transmitting shielding layer on the thin-film transistor layer in each direction relative to the positive projection of the light-transmitting opening on the thin-film transistor layer is [0, 5 μm].

9. The display module according to any one of claims 1-8, characterized in that, The number of the light-transmitting openings is multiple. The touch function layer includes a plurality of first touch traces, each first touch trace is correspondingly disposed for one light-transmitting opening, the first touch trace is used to transmit touch signals, and the positive projection of each light-transmitting opening on the thin-film transistor layer is symmetric about the positive projection of the corresponding first touch trace on the thin-film transistor layer. The positive projections of every two adjacent light-emitting pixels on the thin-film transistor layer are symmetric about the positive projection of the corresponding first touch trace on the thin-film transistor layer.

10. The display module according to claim 1, characterized in that, The thin-film transistor layer includes a plurality of thin-film transistors. Each thin-film transistor includes an active layer, a gate, a source electrode, a drain electrode, and a planarization layer. The source electrode and the drain electrode are both in contact with the active layer. The drain electrode is electrically connected to the light-emitting pixel. The planarization layer covers the source electrode and the drain electrode. The light-transmitting shielding layer is located between the cathode trace and the planarization layer.

11. An electronic device, characterized in that, The electronic device includes a housing and the display module according to any one of claims 1-10, and the display module is disposed in the accommodation space of the housing.

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