Display module and manufacturing method therefor, and display device

Abstract

Embodiments of the present application provide a display module and a manufacturing method therefor, and a display device. The display module comprises: a substrate; a light-emitting layer arranged on one side of the substrate, the light-emitting layer comprising a plurality of light-emitting units; and a light filtering layer arranged on the side of the light-emitting layer facing away from the substrate, the light filtering layer comprising a light shielding part and a light filtering opening, light filtering units being arranged in the light filtering opening, and the orthographic projections of the light filtering units on the substrate being at least partially overlapped with the orthographic projections of the light emitting units on the substrate, wherein clearance grooves are formed in the light shielding part, filling units are arranged in the clearance grooves, the filling units are used for allowing light in a first band to pass through and for filtering light in a second band, and the first band and the second band are at least partially not overlapped.

Description

Display module, manufacturing method thereof, and display device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311018356.3, filed on August 10, 2023, entitled “Display module, preparation method thereof, and display device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of display devices, and in particular to a display module and a preparation method thereof, and a display device. Background Art

[0004] With the rapid development of electronic devices, users have higher and higher requirements for screen-to-body ratio, making the full-screen display of electronic devices receive more and more attention in the industry.

[0005] Traditional electronic devices, such as mobile phones and tablets, require high display transmittance due to the need to integrate front-facing infrared sensors and fingerprint recognition components. However, the filter layer on current display devices requires the use of light-shielding elements such as black matrices, which severely reduces the transmittance of the display.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a display module, a method for manufacturing the same, and a display device, aiming to improve the transmittance of the display module.

[0008] An embodiment of the first aspect of the present application provides a display module, comprising: a substrate; a light-emitting layer, arranged on one side of the substrate, the light-emitting layer comprising a plurality of light-emitting units; a filter layer, arranged on a side of the light-emitting layer facing away from the substrate, the filter layer comprising a shading portion and a filter opening, a filter unit being arranged in the filter opening, the orthographic projection of the filter unit on the substrate at least partially overlapping with the orthographic projection of the light-emitting unit on the substrate; wherein a clearance groove is provided on the light-shading portion, a filling unit is provided in the clearance groove, the filling unit is used to allow light within a first wavelength band to pass through, and the filling unit is used to filter light within a second wavelength band, and the first wavelength band and the second wavelength band at least partially do not overlap.

[0009] An embodiment of a second aspect of the present application provides a method for preparing a display module, comprising:

[0010] A light-emitting layer is prepared on a substrate, wherein the light-emitting layer includes a plurality of light-emitting units;

[0011] A light-shielding material layer is prepared on a side of the light-emitting layer facing away from the substrate, and the light-shielding material layer is patterned to form a light-shielding portion, a light-filtering opening, and a clearance groove, wherein the orthographic projection of the light-filtering opening on the substrate at least partially overlaps with the orthographic projection of the light-emitting unit on the substrate;

[0012] A filter unit is provided in the filter opening, and a filling unit is provided in the recess. The filling unit is used to allow light in a first wavelength band to pass through, and is used to filter light in a second wavelength band. The first wavelength band and the second wavelength band at least partially do not overlap.

[0013] An embodiment of the third aspect of the present application provides a display device, comprising a display module of any of the above embodiments; a photosensitive element, arranged on a side of the substrate away from the light-emitting layer, the photosensitive element being used to receive light information in a first wavelength band.

[0014] In the display module provided in an embodiment of the present application, the display module includes a substrate, a light-emitting layer, and a filter layer. The light-emitting layer includes a light-emitting unit, which is used to emit light to achieve a luminous display of the display module. The filter layer includes a light-shielding portion and a light-filtering unit. The light-filtering unit is capable of filtering stray light to improve the display quality of the display module. A filling unit is also provided within the yield opening of the light-shielding portion. The filling unit is capable of allowing light within a first wavelength band to pass through, thereby ensuring the transmittance of the display module. When a photosensitive element is provided on the non-display side of the display module, the photosensitive element can obtain light information within the first wavelength band without affecting the normal operation of the photosensitive element. In addition, the filling unit is capable of filtering light within a second wavelength band, so that the filling unit can block the propagation of at least a portion of the light within the second wavelength band. When the display module is in the off state, the display difference between the area where the filling unit is located and other areas can be reduced, thereby improving the display quality of the display module in the off state. Therefore, by providing the filling unit within the yield opening, the present application can not only improve the transmittance of the display module, but also ensure the display quality of the display module in the off state. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features.

[0016] FIG1 is a schematic top view of a display module according to an embodiment of the present application;

[0017] FIG2 is a schematic diagram showing a partially enlarged structure of a display module provided in an embodiment of the present application;

[0018] FIG3 shows a cross-sectional view of a display module provided in an embodiment of the present application;

[0019] FIG4 is a schematic diagram showing a partially enlarged structure of a display module provided by another embodiment of the present application;

[0020] FIG5 shows a filtering curve diagram of light of different wavelength bands by a red filling unit of a filter layer of a display module provided by an embodiment of the present application;

[0021] FIG6 shows a filtering curve diagram of light of different wavelength bands by a green filling unit of a filter layer of a display module provided by an embodiment of the present application;

[0022] FIG7 shows a filtering curve diagram of light of different wavelength bands by a blue filling unit of a filter layer of a display module provided by an embodiment of the present application;

[0023] FIG8 is a schematic diagram showing a partially enlarged structure of a display module provided in another embodiment of the present application;

[0024] FIG9 is a schematic diagram showing a partially enlarged structure of a display module provided in another embodiment of the present application;

[0025] FIG10 shows a cross-sectional view of a display module provided by another embodiment of the present application;

[0026] FIG11 is a partial enlarged structural diagram of a display module provided in yet another embodiment of the present application;

[0027] FIG12 shows a flow chart of manufacturing a display module provided in an embodiment of the present application;

[0028] FIG13 shows a partial cross-sectional view of a display device provided in an embodiment of the present application.

[0029] Explanation of the accompanying drawings: 10. Display module; 20. Photosensitive element; 100. Substrate; 200. Light-emitting layer; 210. Light-emitting unit; 211. Red light-emitting unit; 212. Green light-emitting unit; 213. Blue light-emitting unit; 300. Filter layer; 310. Light-shielding portion; 320. Filter unit; 321. Red filter unit; 322. Green filter unit; 323. Blue filter unit; 330. Filling unit; 331. Red filling unit; 332. Green filling unit; 333. Blue filling unit; 340. Filter opening; 350. Give way groove; 400. First electrode layer; 410. First electrode; 500. Second electrode layer; 600. Encapsulation layer; AA1, first display area; AA2, second display area; NA, non-display area; X, first direction; Y, second direction; Z, thickness direction. DETAILED DESCRIPTION

[0030] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are set forth in order to provide a comprehensive understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the well-known structures and technologies are not shown in order to avoid unnecessary ambiguity in the present application; and, for clarity, the sizes of some structures may be exaggerated. In addition, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0031] In the description of this application, it should be noted that, unless otherwise specified, "plurality" means more than two; terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are merely for the purpose of facilitating the description of this application and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting this application. Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] In order to better understand the present application, the display module and its preparation method, and the display device of the embodiment of the present application are described in detail below with reference to Figures 1 to 11.

[0034] An embodiment of the present application provides a display module, which may be an organic light emitting diode (OLED) display module.

[0035] Please refer to Figures 1 to 3 together. Figure 1 shows a top view of a display module 10 provided in an embodiment of the present application. Figure 2 shows a partially enlarged structural schematic diagram of a display module 10 provided in an embodiment of the present application. Figure 3 shows a cross-sectional view of a display module 10 provided in an embodiment of the present application.

[0036] As shown in Figures 1 to 3, a first aspect of the present application provides a display module 10, which includes a substrate 100, a light-emitting layer 200, and a filter layer 300. The light-emitting layer 200 is disposed on one side of the substrate 100 and includes a plurality of light-emitting units 210. The filter layer 300 is disposed on a side of the light-emitting layer 200 facing away from the substrate 100 and includes a light-shielding portion 310 and a light-filtering opening 340. A light-filtering unit 320 is disposed within the light-filtering opening 340, and the orthographic projection of the light-filtering unit 320 on the substrate 100 at least partially overlaps with the orthographic projection of the light-emitting unit 210 on the substrate 100. A clearance groove 350 is disposed on the light-shielding portion 310, and a filling unit 330 is disposed within the clearance groove 350. The filling unit 330 is configured to allow light within a first wavelength band to pass through and to filter light within a second wavelength band, wherein the first wavelength band and the second wavelength band at least partially do not overlap.

[0037] In the display module 10 provided in the embodiment of the present application, the display module 10 includes a substrate 100, a light-emitting layer 200, and a filter layer 300. The light-emitting layer 200 includes a light-emitting unit 210, which is used to emit light to achieve a light-emitting display of the display module 10. The filter layer 300 includes a light-shielding portion 310 and a filter unit 320. The filter unit 320 can filter stray light and improve the display effect of the display module 10. A filling unit 330 is also provided in the recess 350 of the light-shielding portion 310. The filling unit 330 can allow light within the first wavelength band to pass through, thereby improving the transmittance of the display module 10 in the area where the recess 350 is located. When a photosensitive element is provided on the non-display side of the display module 10, the photosensitive element can obtain light information within the first wavelength band passing through the filling unit 330, without affecting the normal use of the photosensitive element. Furthermore, the filling unit 330 can filter light within the second wavelength band, thereby blocking at least some of the light within the second wavelength band from propagating. This reduces the display difference between the area where the filling unit 330 is located and other areas when the display module 10 is in the off state, thereby improving the display quality of the display module 10 in the off state. Therefore, by disposing the filling unit 330 within the recess 350, the present application not only ensures the light transmittance of the display module 10, but also ensures the display quality of the display module 10 in the off state.

[0038] There are many ways to set up the substrate 100. For example, the substrate 100 may include a substrate and a first conductive layer, a second conductive layer, and a third conductive layer arranged on one side of the substrate and stacked. An insulating layer is provided between adjacent conductive layers. Exemplarily, the pixel driving circuit provided on the substrate 100 includes a transistor and a storage capacitor. The transistor includes a semiconductor, a gate, a source and a drain. The storage capacitor includes a first plate and a second plate. As an example, the gate and the first plate can be located in the first conductive layer, the second plate can be located in the second conductive layer, and the source and drain can be located in the third conductive layer. In other embodiments, the substrate 100 may include a first conductive layer, a second conductive layer, a third conductive layer, and a fourth conductive layer.

[0039] Optionally, a pixel definition layer is provided on the substrate 100, the pixel definition layer including a pixel defining portion and a pixel opening formed by the pixel defining portion, and the light-emitting unit 210 can be provided in the pixel opening. The light-emitting unit 210 can include a red light-emitting unit 211, a green light-emitting unit 212, and a blue light-emitting unit 213.

[0040] Optionally, a first electrode layer 400 is provided on the substrate 100, and the first electrode layer 400 includes a plurality of first electrodes 410 distributed in an array, and the plurality of first electrodes 410 are arranged at intervals, and each first electrode 410 is arranged corresponding to each pixel opening, so that the first electrode 410 can act on the light-emitting unit 210 in the pixel opening and cause it to emit light for display.

[0041] Optionally, a second electrode 500 is provided on the side of the light-emitting layer 200 facing away from the substrate 100. The second electrode 500 can be a full-surface electrode. The second electrode 500 interacts with the first electrode 410 to drive the light-emitting unit 210 to emit light for display. Optionally, an encapsulation layer 600 is provided on the side of the second electrode 500 facing away from the substrate 100. The encapsulation layer 600 is used to encapsulate the light-emitting unit 210 and reduce the impact of water and oxygen intrusion on the light-emitting unit 210.

[0042] Optionally, the filter layer 300 is disposed on a side of the encapsulation layer 600 facing away from the substrate 100 to ensure an encapsulation effect.

[0043] There are many ways to set up the filter unit 320. Optionally, the filter unit 320 includes a red filter unit 321, a green filter unit 322 and a blue filter unit 323. The red filter unit 321 is set correspondingly to the red light-emitting unit 211, the green filter unit 322 is set correspondingly to the green light-emitting unit 212, and the blue filter unit 323 is set correspondingly to the blue light-emitting unit 213. The corresponding arrangement of the red filter unit 321 and the red light-emitting unit 211 means that the orthographic projection of the red light-emitting unit 211 on the substrate 100 and the orthographic projection of the red filter unit 321 on the substrate 100 are at least partially overlapped; the corresponding arrangement of the green filter unit 322 and the green light-emitting unit 212 means that the orthographic projection of the green light-emitting unit 212 on the substrate 100 and the orthographic projection of the green filter unit 322 on the substrate 100 are at least partially overlapped; the corresponding arrangement of the blue filter unit 323 and the blue light-emitting unit 213 means that the orthographic projection of the blue light-emitting unit 213 on the substrate 100 and the orthographic projection of the blue filter unit 323 on the substrate 100 are at least partially overlapped.

[0044] In some optional embodiments, the orthographic projection of the red filter unit 321 on the substrate 100 covers the orthographic projection of the red light-emitting unit 211 on the substrate 100; similarly, the orthographic projection of the green filter unit 322 on the substrate 100 covers the orthographic projection of the green light-emitting unit 212 on the substrate 100; and the orthographic projection of the blue filter unit 323 on the substrate 100 covers the orthographic projection of the blue light-emitting unit 213 on the substrate 100.

[0045] There are many ways to set the first band and the second band, and users can set them according to actual needs. For example, when a photosensitive element is provided on the non-display side of the display module 10, the photosensitive element is used to obtain light within the first band. For example, when the photosensitive element is an infrared photosensitive element, the light within the first band can be infrared light. When the sensory element is other modules such as a fingerprint recognition module, the first band can also be light within other bands, for example, the light within the first band is red light. It is sufficient that the second band and the first band do not overlap at least partially. For example, the second band can be light within all bands except the first band, for example, the second band is light except red light; or the second band is light within some bands except the first band, for example, the light within the second band is blue light and / or green light. Optionally, the second band can be light in visible light except the first band.

[0046] Since there is a phenomenon of gradual color transition between lights of different colors, and their wavelengths are also different, when dividing color descriptions, the wavelengths cannot be strictly divided into different ranges according to color, and there may be areas where some wavelengths of lights of different colors overlap. For example, when the light in the first wavelength band is infrared light and the second wavelength band is red light, the wavelengths of infrared light and red light are close. When the filling unit 330 is filtering, some red light close to the infrared wavelength band may also pass through the filling unit 330, which will cause partial overlap between the first wavelength band and the second wavelength band. When the light in the first wavelength band is infrared light and the light in the second wavelength band is blue light, the wavelength difference between infrared light and blue light is large, and there is no overlap between the first wavelength band and the second wavelength band. Optionally, when the filling unit 330 is a plurality of filling units 330, the plurality of filling units 330 can all allow the light in the first wavelength band to pass through and filter the light in the second wavelength band. Alternatively, a single filling unit 330 may allow light within the first wavelength band to pass through and filter light within the second wavelength band. Different filling units 330 may correspond to the same or different first wavelength bands.

[0047] There are many ways to configure the material of the filling unit 330 , as long as the filling unit 330 can allow light within the first wavelength band to pass through and filter light within the second wavelength band.

[0048] In some optional embodiments, the material of the filling unit 330 is the same as the material of at least a portion of the filter unit 320 .

[0049] In these optional embodiments, the material of the filter unit 320 has the function of allowing light within a preset band to pass through and filtering light within part of the band. The filling unit 330 and the filter unit 320 are made of the same material. On the one hand, the function of the filling unit 330 can be realized. On the other hand, the filling unit 330 and at least part of the filter unit 320 can be prepared and formed in the same process step, which can simplify the preparation process of the display module.

[0050] As described above, please refer to Figures 3 and 4 together. Optionally, the filter unit 320 includes a red filter unit 321, a green filter unit 322 and a blue filter unit 323, and the filling unit 330 may include at least one of the red filling unit 331, the green filling unit 332 and the blue filling unit 333. The material of the red filling unit 331 is the same as that of the red filter unit 321, the material of the green filling unit 332 is the same as that of the green filter unit 322, and the material of the blue filling unit 333 is the same as that of the blue filter unit 323.

[0051] In these optional embodiments, the red filling unit 331 can be made of the same material as the red filter unit 321, the green filling unit 332 can be made of the same material as the green filter unit 322, and the blue filling unit 333 can be made of the same material as the blue filter unit 323, which can simplify the preparation process of the display module.

[0052] Optionally, when the filling unit 330 includes a red filling unit 331 , the red filling unit 331 can mainly allow light within a wavelength range of 625 nm to 740 nm to pass through, and filter out other visible light rays.

[0053] Optionally, when the filling unit 330 includes a green filling unit 332 , the green filling unit 332 can mainly allow light within a wavelength range of 490 nm to pass through and filter out other visible light rays.

[0054] Optionally, when the filling unit 330 includes a blue filling unit 333 , the blue filling unit 333 can mainly allow light within a wavelength range of 440 nm to pass through and filter out other visible light rays.

[0055] In some optional embodiments, as described above, when the photosensitive element is an infrared photosensitive element, the light in the first band is infrared light, so that the filling unit 330 can allow the infrared light to pass through without affecting the infrared photosensitive element from acquiring light information.

[0056] As shown in Figures 5 to 7, the horizontal axis in Figure 5 is wavelength, and the vertical axis is the transmittance of the red filling unit 331 to light of different wavelengths. The horizontal axis in Figure 6 is wavelength, and the vertical axis is the transmittance of the green filling unit 332 to light of different wavelengths. The horizontal axis in Figure 7 is wavelength, and the vertical axis is the transmittance of the blue filling unit 333 to light of different wavelengths. When the light in the first wavelength band is infrared light, the filling unit 330 can simultaneously include a red filling unit 331, a green filling unit 332, and a blue filling unit 333. The red filling unit 331, the green filling unit 332, and the blue filling unit 333 all have a good pass rate for the wavelength band above 750nm, that is, the red filling unit 331, the green filling unit 332, and the blue filling unit 333 all have a good pass effect on the infrared light band, and can filter out some visible light other than infrared light.

[0057] In these optional embodiments, on the one hand, the filling unit 330 can allow infrared light to pass through without affecting the use of the photosensitive element; on the other hand, the filling unit 330 has a display effect close to that of the filter unit 320, which can improve the display effect of the display module in the screen-off state. For the display module in the related art, a photosensitive element is provided on the back side of the display module to obtain light information through the display module. In order to improve the transmittance of the display module, it is necessary to open a hole in the shading portion 310. If the opening is not filled with material or is filled with transparent material, all light can pass through the opening, while other positions are the filter unit 320 or the shading portion 310. In the screen-off state, the display difference between the opening position filled with transparent material or not filled with material and other areas is large, which affects the display effect of the display module in the screen-off state.

[0058] Optionally, the filling unit 330 includes a red filling unit 331 , and at least one red filling unit 331 is adjacent to the red filter unit 321 to improve the display effect of the display module in the screen-off state.

[0059] Optionally, the filling unit 330 includes a green filling unit 332 , and at least one green filling unit 332 is adjacent to the green filter unit 322 to improve the display effect of the display module in the screen-off state.

[0060] Optionally, the filling unit 330 includes a blue filling unit 333 , and at least one blue filling unit 333 is adjacent to the blue filter unit 323 to improve the display effect of the display module in the screen-off state.

[0061] Optionally, as shown in Figure 8, when the filling unit 330 includes a red filling unit 331, a green filling unit 332 and a blue filling unit 333, the arrangement of the red filling unit 331, the green filling unit 332 and the blue filling unit 333 is the same as the arrangement of the red filter unit 321, the green filter unit 322 and the blue filter unit 323.

[0062] For example, as shown in FIG8 , when the filter unit 320 includes a first group of filter structures and a second group of filter structures arranged alternately along a first direction X, the first group of filter structures includes blue filter units 323 and red filter units 321 arranged alternately along a second direction Y, and the second group of filter structures includes green filter units 322 arranged sequentially along the second direction Y, the filling unit 330 includes a first group of filling structures and a second group of filling structures arranged alternately along the first direction X, the first group of filling structures includes blue filling units 333 and red filling units 331 arranged alternately along the second direction Y, and the second group of filling structures includes green filling units 332 arranged sequentially along the second direction Y. That is, the arrangement pattern of the red filling units 331, green filling units 332, and blue filling units 333 is the same as the arrangement pattern of the red filter units 321, green filter units 322, and blue filter units 323, thereby improving the effect of the filling unit 330 on the display effect of the display module. The first direction X is any direction on the plane where the filter layer 300 is located. The second direction Y intersects with the first direction X and is also located on the plane where the filter layer 300 is located. In some embodiments, the first direction X is perpendicular to the second direction Y.

[0063] Optionally, in the above embodiment, the blue filling unit 333 can be located between the blue filter unit 323 and the red filter unit 321 arranged in sequence in the second direction Y, the red filling unit 331 can be located between the red filter unit 321 and the blue filter unit 323 arranged in sequence in the second direction Y, and the green filling unit 332 can be located between two adjacent green filter units 322 in the second direction Y.

[0064] In other optional embodiments, the photosensitive element can also be a fingerprint recognition element, which is used to identify the light emitted by the light-emitting unit 210 and then reflected back after reaching the finger. At this time, the light in the first wave can be the light emitted by at least one light-emitting unit 210.

[0065] In the above embodiment, the filling unit 330 may optionally include a green filling unit 332. The material of the green filling unit 332 is the same as that of the green filter unit 322. The green filling unit 332 can transmit green light and filter other stray light.

[0066] Alternatively, the filling unit 330 includes a red filling unit 331, a green filling unit 332 and a blue filling unit 333. The red filling unit 331 can allow the light emitted by the red light-emitting unit 211 to pass through and filter other light. The green filling unit 332 can allow the light emitted by the green light-emitting unit 212 to pass through and filter other light. The blue filling unit 333 can allow the light emitted by the blue light-emitting unit 213 to pass through and filter other light. This can increase the amount of light passing through the filling unit 330 and improve the recognition accuracy of the photosensitive element.

[0067] In some optional embodiments, when the filling unit 330 includes a red filling unit 331, a green filling unit 332 and a blue filling unit 333, the ratio of the total area of ​​the red filling unit 331 to the green filling unit 332 is the same as the ratio of the total area of ​​the red filter unit 321 to the green filter unit 322.

[0068] In these optional embodiments, the sum of the areas of all red filling units 331 is A, the sum of the areas of all green filling units 332 is B; the sum of the areas of all red filter units 321 is a, the sum of the areas of all green filter units 322 is b, and A:B=a:b.

[0069] Similarly, in some other optional embodiments, the ratio of the total area of ​​the red filling unit 331 to the blue filling unit 333 is the same as the ratio of the total area of ​​the red filter unit 321 to the blue filter unit 323 .

[0070] In some other optional embodiments, the ratio of the total area of ​​the green filling unit 332 to the blue filling unit 333 is the same as the ratio of the total area of ​​the green filter unit 322 to the blue filter unit 323 .

[0071] In some optional embodiments, as shown in Figure 9, when the filling unit 330 includes a red filling unit 331, a green filling unit 332 and a blue filling unit 333, the ratio of the total area of ​​the red filling unit 331, the green filling unit 332 and the blue filling unit 333 is the same as the ratio of the total area of ​​the red filter unit 321, the green filter unit 322 and the blue filter unit 323.

[0072] In these optional embodiments, the ratio of the total areas of the different-colored filling cells 330 is the same as the ratio of the total areas of the different-colored filter cells 320. For example, the sum of the areas of all red filling cells 331 is M, the sum of the areas of all green filling cells 332 is N, and the sum of the areas of all blue filling cells 333 is K; the sum of the areas of all red filter cells 321 is m, the sum of the areas of all green filter cells 322 is n, and the sum of the areas of all blue filter cells 323 is k; and M:N:K = m:n:k. By aligning the area distribution of the filling cells 330 with the area distribution of the filter cells 320, more light emitted from the filter cells 320 and reflected by the user's fingertips can pass through the filling cells 330, thereby improving the recognition accuracy of the photosensitive element. Furthermore, the display quality of the display module 10 in the off state can be maintained.

[0073] Optionally, the ratio between the total area of ​​the multiple red filling units 331, the total area of ​​the multiple green filling units 332 and the total area of ​​the multiple blue filling units 333 may be the same as the ratio between the total area of ​​the multiple red filter units 321, the total area of ​​the multiple green filter units 322 and the total area of ​​the multiple blue filter units 323.

[0074] Optionally, the clearance slots 350 for accommodating a single red fill cell 331, the clearance slots 350 for accommodating a single green fill cell 332, and the clearance slots 350 for accommodating a blue fill cell 333 are of the same size but in different numbers, such that the ratio between the total area of ​​the multiple red fill cells 331, the total area of ​​the multiple green fill cells 332, and the total area of ​​the multiple blue fill cells 333 is the same as the ratio between the total area of ​​the multiple red filter cells 321, the total area of ​​the multiple green filter cells 322, and the total area of ​​the multiple blue filter cells 323. For example, if the total area of ​​the blue filter cells 323 is larger, a larger number of clearance slots 350 can be provided for accommodating the blue fill cells 333. With a larger number of blue fill cells 333, the area ratio of the different color fill cells 330 is the same as the area ratio of the different color filter cells 3202. In these embodiments, the uniform size of the clearance slots 350 can further reduce display differences between different areas in the screen-off state. It is worth noting that the same size of the clearance grooves 350 means that the size, shape and structure of the clearance grooves 350 are all the same.

[0075] Alternatively, in other embodiments, the area ratio of individual filling cells of the same color to the filter cells may be the same, i.e., the area ratio of the individual red filling cells 331, the individual green filling cells 332, and the individual blue filling cells 333 may be the same as the area ratio of the individual red filter cells 321, the individual green filter cells 322, and the individual blue filter cells 323. This allows light to pass through the filling cells 330 of different colors more evenly. Alternatively, in the above embodiment, the arrangement of the red filling cells 331, the green filling cells 332, and the blue filling cells 333 may be the same as the arrangement of the red filter cells 321, the green filter cells 322, and the blue filter cells 323. When the light emitted from the filter unit 320 is reflected back to the filling unit 330 through the user's fingertips, the light emitted from the red filter unit 321 is more likely to be reflected to the red filling unit 331, the light emitted from the green filter unit 322 is more likely to be reflected to the green filling unit 332, and the light emitted from the blue filter unit 323 is more likely to be reflected to the blue filling unit 333, so as to further increase the amount of light passing through the filling unit 330 and improve the recognition accuracy of the photosensitive element.

[0076] In some optional embodiments, as shown in FIG3 , the clearance groove 350 may be a through groove, that is, the clearance groove 350 is provided through the light shielding portion 310. For example, the size of the filling unit 330 in the thickness direction Z is the same as the size of the light shielding portion 310 in the thickness direction Z. This can effectively improve the light transmittance of the area where the clearance groove 350 is located.

[0077] Alternatively, in other embodiments, as shown in FIG10 , the clearance groove 350 may be a blind groove. For example, the clearance groove 350 does not penetrate the light shielding portion 310, and the clearance groove 350 is formed by the light shielding portion 310 being recessed toward and / or away from the substrate 100. The thickness of the area where the clearance groove 350 is located is relatively small, which can improve the light transmittance of the area where the clearance groove 350 is located.

[0078] When the clearance groove 350 is a blind groove, the thickness of the bottom of the clearance groove 350 can optionally be greater than 0 and less than or equal to 0.35 μm. A smaller thickness of the bottom of the clearance groove 350 can ensure light transmittance in the area where the clearance groove 350 is located. For example, the thickness of the bottom of the clearance groove 350 can be 0.02 μm, 0.05 μm, 0.08 μm, 0.1 μm, ..., 0.2 μm, 0.24 μm, ..., 0.34 μm, or 0.35 μm.

[0079] As shown in Figure 1, the display module has a first display area AA1, a second display area AA2, and a non-display area NA surrounding the first and second display areas AA1 and AA2. The light transmittance of the first display area AA1 is greater than the light transmittance of the second display area AA2. Alternatively, in other embodiments, the display module is a full-screen display and does not include the non-display area NA.

[0080] In the display module provided in the embodiment of the present application, the display module has a first display area AA1 and a second display area AA2.

[0081] In some optional embodiments, the opening ratio of the filling unit 330 is greater than or equal to 2.5% and less than or equal to 9.5%. The opening ratio of the filling unit 330 can be set to, for example, 2.5%, 2.6%, 3.4%, 3.5%, 8.07%, 8.85%, 9.5%, etc.

[0082] For example, if the transmittance of the first display area AA1 is greater than that of the second display area AA2, then the filling unit 330 is disposed in the first display area AA1, and the aperture ratio of the filling unit 330 refers to the ratio of the area of ​​the filling unit 330 to the total area of ​​the first display area AA1. Alternatively, if the transmittance of the first display area AA1 and the transmittance of the second display area AA2 are the same, the filling unit 330 can be disposed in both the first display area AA1 and the second display area AA2, and the aperture ratio of the filling unit 330 refers to the ratio of the area of ​​the filling unit 330 to the total area of ​​the first display area AA1 and the second display area AA2.

[0083] In these optional embodiments, when the aperture ratio of the filling unit 330 is within the above range, it can improve the problem that too little light passes through the filling unit 330 due to the small aperture ratio of the filling unit 330, thereby affecting the operation of the photosensitive element; it can also improve the problem that too large an aperture ratio of the filling unit 330 affects the distribution area of ​​the filter unit 320 and affects the display effect of the display module 10.

[0084] Optionally, the orthographic projection of each light emitting unit 210 on the substrate 100 is located within the orthographic projection of each filter unit 320 on the substrate 100 , so that more light can be emitted through the filter unit 320 to improve the display effect of the display module 10 .

[0085] Optionally, the orthographic projection of the light emitting unit 210 on the substrate 100 and the orthographic projection of each filling unit 330 on the substrate 100 are staggered to improve the display effect of the light incident on the filling unit 330 and incident on the light emitting unit 210.

[0086] Please refer to Figures 9 and 11 together. There are various ways to set the shape of the clearance groove 350. As shown in Figure 9, if the orthographic projection of the clearance groove 350 on the substrate 100 is circular, then the orthographic projection of the filling unit 330 on the substrate 100 is circular. Alternatively, as shown in Figure 11, if the orthographic projection of at least some of the clearance grooves 350 on the substrate 100 is rectangular, then the orthographic projection of the filling unit 330 on the substrate 100 is rectangular. Optionally, the orthographic projection of the clearance groove 350 on the substrate 100 can be polygonal, irregular, or other shapes, then the orthographic projection of the filling unit 330 on the substrate 100 can be polygonal, irregular, or other shapes. The orthographic projections of multiple clearance grooves 350 on the substrate 100 can be the same or different. The orthographic projections of multiple clearance grooves 350 corresponding to filling units 330 of the same color on the substrate 100 can be the same or different.

[0087] Referring to FIG. 12 , an embodiment of the second aspect of the present application further provides a method for preparing a display module. The display module may be any of the display modules of the first aspect described above. Referring to FIG. 1 to FIG. 12 , the method for preparing a display module includes:

[0088] Step S01 : preparing a light-emitting layer 200 on a substrate 100 , wherein the light-emitting layer 200 includes a plurality of light-emitting units 210 .

[0089] Optionally, a pixel definition layer may be prepared on the substrate 100 to form a pixel defining portion and a pixel opening, and then the light emitting unit 210 may be formed in the pixel opening by vapor deposition.

[0090] Step S02: Prepare a light-shielding material layer on the side of the light-emitting layer 200 facing away from the substrate 100, and pattern the light-shielding material layer to form a light-shielding portion 310, a filter opening 340 and a clearance groove 350, and the orthographic projection of the filter opening 340 on the substrate 100 at least partially overlaps with the orthographic projection of the light-emitting unit 210 on the substrate 100.

[0091] Step S03: a filter unit 320 is set in the filter opening 340 and a filling unit 330 is set in the clearance groove 350. The filling unit 330 is used to allow light in a first wavelength band to pass through and to filter light in a second wavelength band. The first wavelength band and the second wavelength band at least partially do not overlap.

[0092] Optionally, the position and size of the clearance groove 350 are the same as those of the filling unit 330 , and therefore are not repeatedly marked in the drawings.

[0093] In the display module 10 prepared and formed in the embodiment of the present application, the light-emitting unit 210 is used to emit light to realize the light-emitting display of the display module 10. The filter layer 300 includes a light-shielding portion 310 and a light-filtering unit 320. The light-filtering unit 320 can filter stray light and improve the display effect of the display module 10. A filling unit 330 is also provided in the recess 350 of the light-shielding portion 310. The filling unit 330 can allow light within the first wavelength band to pass through, thereby improving the transmittance of the display module 10. When a photosensitive element is provided on the non-display side of the display module 10, the photosensitive element can obtain light information within the first wavelength band passing through the filling unit 330, which will not affect the normal use of the photosensitive element.

[0094] Furthermore, the filling unit 330 can filter light within the second wavelength band, thereby blocking at least some of the light within the second wavelength band from propagating. This reduces the display difference between the area where the filling unit 330 is located and other areas when the display module 10 is in the off state, thereby improving the display quality of the display module 10 in the off state. Therefore, by disposing the filling unit 330 within the recess 350, the present application not only ensures the light transmittance of the display module 10, but also ensures the display quality of the display module 10 in the off state.

[0095] Referring to FIG. 13 , an embodiment of the third aspect of the present application further provides a display device, comprising the display module 10 of any of the aforementioned first aspect embodiments and a photosensitive element 20. The photosensitive element 20 is disposed on a side of the substrate 100 facing away from the light-emitting layer 200, and is configured to receive light information in a first wavelength band. Because the display device provided by the embodiment of the third aspect of the present application comprises the display module 10 of any of the aforementioned first aspect embodiments, the display device provided by the embodiment of the third aspect of the present application has the same beneficial effects as the display module 10 of any of the aforementioned first or second aspects, and further details thereof will not be given here.

[0096] Optionally, the photosensitive element 20 includes at least one of a fingerprint recognition sensor and an infrared sensor.

[0097] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A display module, comprising: substrate; A light-emitting layer is disposed on one side of the substrate, and the light-emitting layer includes a plurality of light-emitting units; A filter layer is arranged on a side of the light-emitting layer away from the substrate, the filter layer comprises a light shielding portion and a filter opening, a filter unit is arranged in the filter opening, and an orthographic projection of the filter unit on the substrate at least partially overlaps with an orthographic projection of the light-emitting unit on the substrate; The shading portion is provided with a clearance groove, and a filling unit is provided in the clearance groove. The filling unit is used to allow light in a first wavelength band to pass through, and the filling unit is used to filter light in a second wavelength band. The first wavelength band and the second wavelength band at least partially do not overlap.

2. The display module according to claim 1, wherein: The material of the filling unit is the same as the material of at least a portion of the filter unit.

3. The display module according to claim 2, wherein: The filter unit includes a red filter unit, a green filter unit and a blue filter unit, the filling unit includes at least one of a red filling unit, a green filling unit and a blue filling unit, the material of the red filling unit is the same as the material of the red filter unit, the material of the green filling unit is the same as the material of the green filter unit, and the material of the blue filling unit is the same as the material of the blue filter unit.

4. The display module according to claim 3, wherein: The light in the first wavelength band is infrared light.

5. The display module according to claim 4, wherein: The filling unit includes the red filling unit, and at least one of the red filling units is adjacent to the red filter unit.

6. The display module according to claim 4, wherein: The filling unit includes the green filling unit, and at least one of the green filling units is adjacent to the green filter unit.

7. The display module according to claim 4, wherein: The filling unit includes the blue filling unit, and at least one of the blue filling units is adjacent to the blue filter unit.

8. The display module according to claim 4, wherein: The filling unit includes a red filling unit, a green filling unit and a blue filling unit, and the arrangement of the red filling unit, the green filling unit and the blue filling unit is the same as the arrangement of the red filter unit, the green filter unit and the blue filter unit.

9. The display module according to claim 8, wherein: The filter unit includes a first group of filter structures and a second group of filter structures alternately arranged along a first direction, the first group of filter structures includes the blue filter units and the red filter units alternately arranged along the second direction, and the second group of filter structures includes the green filter units arranged in sequence along the second direction; the filling unit includes a first group of filling structures and a second group of filling structures alternately arranged along the first direction, the first group of filling structures includes the blue filling units and the red filling units alternately arranged along the second direction, and the second group of filling structures includes the green filling units arranged in sequence along the second direction; the first direction intersects with the second direction.

10. The display module according to claim 3, wherein: The light in the first wavelength band is light emitted by at least one of the light-emitting units. The filling unit includes a green filling unit; or, The filling unit includes a red filling unit, a green filling unit and a blue filling unit.

11. The display module according to claim 10, wherein: The filling unit includes a red filling unit, a green filling unit and a blue filling unit, and the ratio of the total area of ​​the red filling unit to the green filling unit is the same as the ratio of the total area of ​​the red filter unit to the green filter unit; or, The ratio of the total area of ​​the red filling unit to the blue filling unit is the same as the ratio of the total area of ​​the red filter unit to the blue filter unit; or The ratio of the total area of ​​the green filling unit to the blue filling unit is the same as the ratio of the total area of ​​the green filter unit to the blue filter unit.

12. The display module according to claim 10, wherein: The filling unit includes a red filling unit, a green filling unit and a blue filling unit, and the ratio of the total area of ​​the red filling unit, the green filling unit and the blue filling unit is the same as the ratio of the total area of ​​the red filter unit, the green filter unit and the blue filter unit.

13. The display module according to claim 10, wherein: The ratio of the areas of the single red filling unit, the single green filling unit and the single blue filling unit is the same as the ratio of the areas of the single red filter unit, the single green filter unit and the single blue filter unit.

14. The display module according to claim 1, wherein: The giving way groove is arranged to penetrate the shading portion; or, the giving way groove is a blind groove.

15. The display module according to claim 14, wherein: The give-way groove is a blind groove, and the thickness of the bottom of the give-way groove is greater than 0 and less than or equal to 0.35 μm.

16. The display module according to claim 1, wherein: The opening ratio of the filling unit is greater than or equal to 2.5% and less than or equal to 9.5%.

17. The display module according to claim 1, wherein the display module has a first display area, a second display area, and a non-display area surrounding the first display area and the second display area, the transmittance of the first display area is greater than the transmittance of the second display area; and the filling unit is arranged in the first display area.

18. A method for preparing a display module, wherein: include: Preparing a light-emitting layer on a substrate, wherein the light-emitting layer includes a plurality of light-emitting units; A light-shielding material layer is prepared on a side of the light-emitting layer away from the substrate, and the light-shielding material layer is patterned to form a light-shielding portion, a light-filtering opening, and a clearance groove, wherein the orthographic projection of the light-filtering opening on the substrate at least partially overlaps with the orthographic projection of the light-emitting unit on the substrate; A filter unit is arranged in the filter opening, and a filling unit is arranged in the give way slot, the filling unit is used to allow light in a first wavelength band to pass through, and the filling unit is used to filter light in a second wavelength band, and the first wavelength band and the second wavelength band at least partially do not overlap.

19. A display device, wherein: include: The display module according to any one of claims 1 to 17; or a display module prepared by the preparation method according to claim 18; A photosensitive element is arranged on a side of the substrate away from the light-emitting layer, and the photosensitive element is used to receive light information of the first waveband.

20. The display device according to claim 19, wherein: The photosensitive element includes at least one of a fingerprint recognition sensor and an infrared sensor.

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