Display module, preparation method thereof and display device
By adopting a patterned COE structure on the OLED panel, designing the patterned cathode layer and optimizing the shape of the photoresist layer, the problem of panel reflectivity and viewing angle brightness attenuation is solved, achieving higher brightness and better viewing experience.
Patent Information
- Application Number
- CN202311028302.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-15
- Publication Date
- 2025-02-21
AI Technical Summary
In the prior art, while improving the light output efficiency, the reflectivity of the OLED panel also greatly increases, resulting in the need to introduce a polarizer structure to reduce reflection, but this leads to a decrease in the RGB main wavelength transmittance, affecting the brightness of the panel.
Using a patterned COE structure, the shape of the black photoresist layer and the color photoresist layer are optimized to reduce the shape of the black photoresist layer and the color photoresist layer by designing the patterned cathode layer on the display panel and preparing the patterned black photoresist layer on it. Reflectivity and reduce viewing angle brightness attenuation.
It effectively reduces the reflectivity of the display panel, and attenuation of the black photoresist layer on the viewing angle brightness, improving the user's viewing experience.
Smart Images
Figure CN119497536A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of display technology, and in particular, to a display module and a preparation method thereof, and a display device. Background Art
[0002] In recent years, AMOLED panels have received more and more attention and favor due to their wider color gamut, higher contrast, better color purity, and flexible foldability, and the demand for panel brightness is also increasing. In the prior art, in order to obtain a larger aperture ratio, most OLED devices adopt a top-emitting structure, which improves the light output efficiency while also greatly improving the reflectivity of the panel. Therefore, it is necessary to introduce a polarizer structure to reduce the reflection of the panel. However, this setting causes the RGB main wavelength transmittance of the panel to be reduced to about 50%, and the panel brightness is greatly affected. Therefore, it is extremely important to seek an alternative setting for the polarizer structure under current needs.
[0003] In an optimization scheme of the prior art, a COE (Color filter On Encapsulation) structure is provided to replace the polarizer structure. Specifically, the COE structure includes coating a layer of color filter (CF, Color Filter) on the top of the encapsulated display panel, so that each pixel unit has a color filter corresponding to the color of the pixel above, and the gap between the pixel units is blocked by a black matrix layer (BM, Black Matrix). It can be understood that this COE structure can solve the reflection and light transmittance problems of the display screen: for the incident light from the outside, the unnecessary part will be directly absorbed by the black matrix layer, and the part that is incident through the color film will either be reflected as the corresponding pixel color or blocked by the black matrix layer or other color films. At the same time, the color film has a high transmittance of the main wavelength of RGB (about 70% to 90%, much higher than the main wavelength transmittance of the polarizer structure).
[0004] However, since the black matrix layer covers the intervals between pixel units, the viewing angle brightness of the display panel is greatly attenuated, resulting in a deterioration in the viewing angle visualization effect of the display screen, affecting the user's viewing experience. Summary of the invention
[0005] In view of the problems in the prior art, the purpose of the present disclosure is to provide a display module and a preparation method thereof, and a display device, which reduce the reflectivity while improving the phenomenon that the black photoresist layer significantly attenuates the viewing angle brightness of the display panel, thereby overcoming the problems raised in the prior art.
[0006] Specifically, a first aspect of the present disclosure provides a display module, comprising a display panel, an encapsulation layer, a patterned black photoresist layer, and a patterned color photoresist layer stacked in sequence;
[0007] The display panel includes a plurality of pixel units and a patterned cathode layer, wherein the patterned cathode layer includes a plurality of pixel regions and a connection region, wherein:
[0008] The pixel regions correspond to the pixel units one by one, and the orthographic projection of each pixel region covers the area occupied by the corresponding pixel unit;
[0009] The connection area is used to connect the pixel areas so that there is at least one connection path between any two pixel areas;
[0010] The orthographic projection of the black photoresist coverage area of the patterned black photoresist layer on the display panel covers the connection area;
[0011] The orthographic projection of the color photoresist coverage area of the patterned color photoresist layer on the display panel covers the area occupied by all pixel units.
[0012] In a possible implementation of the first aspect above, the gap region of the patterned cathode layer is covered by an organic cathode patterning material.
[0013] In a possible implementation of the first aspect above, the orthographic projection of the pixel area coincides with an area occupied by the corresponding pixel unit.
[0014] In a possible implementation of the first aspect, the connection area includes a plurality of connection strips;
[0015] The width of the connection strip is smaller than the shortest side length of the pixel unit;
[0016] Each connection strip is disposed between two adjacent pixel regions.
[0017] In a possible implementation of the first aspect, the black photoresist coverage area includes a plurality of black photoresist strips, and the black photoresist strips correspond to the connecting strips one by one;
[0018] The width of the black photoresist band is greater than or equal to the width of the connecting band.
[0019] A second aspect of the present disclosure provides a method for preparing a display module, which may specifically include the following steps:
[0020] A display panel with a patterned cathode layer and a plurality of pixel units is provided, wherein the patterned cathode layer includes a plurality of pixel regions and a connection region, the pixel regions correspond to the pixel units one by one, and the connection region is used to connect the pixel regions so that at least one connection path exists between any two pixel regions;
[0021] preparing an encapsulation layer on the patterned cathode layer;
[0022] Preparing a patterned black photoresist layer on the encapsulation layer so that the orthographic projection of the black photoresist covered area on the display panel covers the connection area;
[0023] A patterned color photoresist layer is prepared on the patterned black photoresist layer, so that the orthographic projection of the color photoresist coverage area on the display panel covers the area occupied by all pixel units.
[0024] In a possible implementation of the second aspect, a process of providing a display panel having a patterned cathode layer and a plurality of pixel units includes:
[0025] Using a fine mask, an organic cathode patterning material is evaporated on the cover layer of the display panel;
[0026] Vapor depositing a cathode material on the organic cathode patterning material to form a patterned cathode layer;
[0027] The cathode coverage area of the fine mask and the patterned cathode layer is consistent.
[0028] In a possible implementation of the second aspect, in a process of preparing a patterned color photoresist layer on a patterned black photoresist layer, the process includes:
[0029] Sequentially preparing a patterned red photoresist layer, a patterned green photoresist layer and a patterned blue photoresist layer on the patterned black photoresist layer;
[0030] The orthographic projection of the patterned red photoresist layer on the display panel corresponds to the distribution position of the red pixel units;
[0031] The orthographic projection of the patterned green photoresist layer on the display panel corresponds to the distribution position of the green pixel unit;
[0032] The orthographic projection of the patterned blue photoresist layer on the display panel corresponds to the distribution position of the blue pixel units.
[0033] In a possible implementation of the second aspect above, the preparation method further includes:
[0034] A protective layer is prepared on the patterned color photoresist layer.
[0035] A third aspect of the present disclosure provides a display device, comprising the display module provided by the first aspect.
[0036] Compared with the prior art, the present invention has the following beneficial effects:
[0037] Through the technical solution provided by the present invention, a patterned COE (Color Filter On Encapsulation) structure is provided. Through the design of the cathode of the patterned display panel, the patterned shapes of the black photoresist layer and the color photoresist layer in the COE structure are determined, so that the optimized patterned COE structure can effectively reduce the reflectivity of the display panel while reducing the coverage area of the light and color photoresist layer at the edge of the pixel, thereby improving the viewing angle brightness attenuation of the panel and enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS
[0038] Other features, objects and advantages of the present disclosure will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.
[0039] Figure 1 According to an embodiment of the present disclosure, a cross-sectional structural schematic diagram of a display module is provided.
[0040] Figure 2 According to an embodiment of the present disclosure, a schematic structural diagram of a patterned cathode layer on the plane where the patterned cathode layer is located is provided.
[0041] Figure 3a According to an embodiment of the present disclosure, another schematic structural diagram of a patterned cathode layer on its plane is provided.
[0042] Figure 3b According to an embodiment of the present disclosure, another schematic structural diagram of a patterned cathode layer on its plane is provided.
[0043] Figure 4 According to an embodiment of the present disclosure, a display module is provided. Figure 2 Schematic diagram of the structure of the section formed by the dotted line C and the dotted line D.
[0044] Figure 5 According to an embodiment of the present disclosure, a schematic flow chart of a method for preparing a display module is provided.
[0045] Figure 6 According to an embodiment of the present disclosure, a schematic diagram of a process of providing a display panel with a patterned cathode layer and a plurality of pixel units is provided. DETAILED DESCRIPTION
[0046] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present application. The present application can also be implemented or applied through other different specific implementation methods, and the details in the present application can also be modified or changed in various ways according to different viewpoints and application systems without departing from the spirit of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.
[0047] The following is a detailed description of the embodiments of the present application with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. The present application can be embodied in a variety of different forms and is not limited to the embodiments described herein.
[0048] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the represented specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they contradict each other.
[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0050] In order to clearly describe the present application, components irrelevant to the description are omitted, and the same reference symbols are given to the same or similar components throughout the specification.
[0051] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.
[0052] When a device is said to be "on" another device, it may be directly on the other device, but there may also be other devices between it. In contrast, when a device is said to be "directly" on another device, there are no other devices between it.
[0053] Although the terms first, second, etc. are used to represent various elements in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. are represented. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate the existence of features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or more other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, will there be an exception to this definition.
[0054] The technical terms used herein are only used to refer to specific embodiments and are not intended to limit the present application. The singular form used herein also includes the plural form unless the sentence clearly indicates the contrary meaning. The meaning of "including" used in the specification is to specify specific characteristics, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.
[0055] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which this application belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with the relevant technical literature and the contents of the current disclosure, and unless defined, shall not be overly interpreted as ideal or very formal meanings.
[0056] It is understandable that, as described in the above-mentioned prior art, although the use of a COE structure instead of a polarizer structure can solve the reflection and light transmittance problems of the display screen, since the black matrix layer covers the intervals between the pixel units, the viewing angle brightness of the display panel is greatly attenuated and the viewing angle visualization effect of the display screen is deteriorated, affecting the user's viewing experience. In order to overcome the above-mentioned defects and further optimize the COE structure, the present disclosure provides a display module and a preparation method thereof, and a display device, which can improve the phenomenon of the black photoresist layer significantly attenuating the viewing angle brightness of the display panel while ensuring the benefits of the COE structure. The technical solution involved in the present disclosure will be specifically explained and described below:
[0057] Specifically, in some embodiments of the present disclosure, Figure 1 FIG. 1 shows a schematic diagram of a cross-sectional structure of a display module. Figure 1 As shown, it may specifically include a display panel 100, an encapsulation layer 200, a patterned black photoresist layer and a patterned color photoresist layer stacked in sequence, wherein:
[0058] The display panel 100 includes a plurality of pixel units 101 (eg Figure 1 The cross-sectional structure diagram shown in FIG. 1 includes a red pixel unit 101a, a green pixel unit 101b, and a blue pixel unit 101c) and a patterned cathode layer 102, wherein the patterned cathode layer 102 may specifically include a plurality of pixel regions ( Figure 1 Not shown) and the connection area ( Figure 1 The specific structure of the patterned cathode layer 102 will be described in detail later.
[0059] The orthographic projection of the black photoresist covering area 300 of the patterned black photoresist layer on the display panel covers the connection area.
[0060] The color resist covering area 400 of the patterned color resist layer (eg, Figure 1 In the cross-sectional structural diagram shown in FIG. 1 , the orthographic projection of the red light-resistance covering area 400a, the green light-resistance covering area 400b and the blue light-resistance covering area 400c on the display panel covers the area occupied by all pixel units 101. Specifically, as Figure 1 As shown, the patterned black photoresist layer and the patterned color photoresist layer are located on the same plane in the display module after preparation, and there is no overlapping area between the patterned black photoresist layer and the patterned color photoresist layer.
[0061] like Figure 1 As shown in the cross-sectional view, it can be seen that the color photoresist covered area 400 corresponds to the pixel unit 101 one by one, and the "width" of the color photoresist covered area 400 is greater than the "width" of the pixel unit 101. Figure 1 The relative position relationship between the black photoresist covered area 300 and the connection area cannot be intuitively shown.
[0062] In the above embodiment, specifically, Figure 2 A schematic diagram of the structure of a patterned cathode layer 102 in the plane where it is located is shown, wherein:
[0063] The pixel area 102a is square, each pixel area 102a corresponds to the pixel unit 101 one by one, and the orthographic projection of each pixel area 102a covers the area occupied by the corresponding pixel unit 101, so as to realize the conduction of the pixel unit 101. In some other implementations of the above embodiments, the shape of the pixel area 102a may also include other shapes including a circle and a hexagon, and the orthographic projection of a single pixel area 102a needs to ensure that it can at least be circumscribed to the corresponding pixel unit 101. In the specific preparation process, a fine mask plate can be used for evaporation of a patterned cathode. In a preferred case, the shape of the pixel area 102a can also be consistent with the shape of the corresponding pixel unit 101, that is, the orthographic projection of the pixel area 102a coincides with the area occupied by the corresponding pixel unit 101.
[0064] The connection area is used to connect the pixel areas 102a so that there is at least one connection path between any two pixel areas 102a, thereby ensuring that the cathode can be turned on. Specifically, the connection area is composed of a plurality of connection strips 102b, each of which is placed between two adjacent pixel areas 102a, and the width of the connection strip 102b is less than the shortest side length of the pixel area 102a. Figure 2 In the patterned cathode layer 102 shown, any two adjacent pixel regions 102a have a connecting strip. In another specific implementation of the above embodiment, Figure 3a and Figure 3b Another schematic diagram of the structure of the patterned cathode layer 102 on the plane where it is located is shown respectively: Figure 2 and Figure 3a It can be seen that Figure 3a The number of connecting strips 102b in the patterned cathode layer 102 is shown as Figure 2 The number of connecting strips 102b shown has been significantly reduced; Figure 2 and Figure 3b It can be seen that Figure 3b The connecting strip 102b in the patterned cathode layer 102 shown can only realize that there is only one path between any two pixel regions 102a. The reduction of the connecting strip 102b here is to reduce the area of the black photoresist covering area 300 as much as possible while ensuring that the cathode can be turned on. Those skilled in the art can freely select and implement it according to actual application conditions, and it is not limited here.
[0065] In the above embodiment, further, the black photoresist covering area 300 includes a plurality of black photoresist strips 300a, the black photoresist strips 300a correspond to the connecting strips 102b one by one, and the width d' of the black photoresist strips is greater than or equal to the width d of the connecting strips 102b. It can be understood that Figure 1 This is equivalent to showing Figure 2The schematic diagram of the cross section formed by the dotted line A and the dotted line B is used to show the corresponding relationship between the black photoresist band and the connecting band. Figure 4 Shows Figure 2 The schematic diagram of the structure of the section formed by the dotted line C and the dotted line D. It can be seen that since there is no pixel area 102a distributed on this section, there is no corresponding pixel unit and color photoresist coverage area 400. Figure 4 As shown, the positions of the black photoresist band 300a and the connecting band 102b in the vertical direction correspond one to one, and the width d' of the black photoresist band 300a is greater than or equal to the width d of the connecting band 102b, so as to achieve that the orthographic projection of the black photoresist coverage area 300 on the display panel covers the connecting area. It can be understood that the fewer the number of connecting bands 102b, the narrower the width d of a single connecting band 102b, and the corresponding black photoresist coverage area 300 will be relatively reduced. Compared with the prior art in which the black photoresist layer is fully covered in the distribution interval of the pixel unit, the above-mentioned display module provided by the present disclosure reduces the coverage area of the black photoresist layer, avoids the problem of the light output of the large viewing angle panel being blocked by the black photoresist layer, and improves the attenuation of the viewing angle brightness of the panel.
[0066] In the above embodiment, further, Figure 2 and Figure 4 As shown, the gap region 103 of the patterned cathode layer 102 is covered by the organic cathode patterning material. It is understandable that when a fine mask is used to evaporate the patterned cathode, a layer of organic cathode patterning material can be evaporated first, and then the cathode material can be evaporated to generate the desired patterned cathode. Those skilled in the art will
[0067] As in the above embodiment, a protective layer is further covered on the patterned color photoresist layer 400. In a specific implementation, an OC (Overcoat) film can be used as a protective layer. The OC film is a cured film protective layer formed by spin-coating a layer of resin material on the surface of the color filter film to improve the flatness and light transmittance of the color filter film surface. At the same time, it has good heat resistance and strength to protect the filter film from damage and improve the service life. Those skilled in the art can select the required protective layer according to actual needs, and it is not limited here.
[0068] In some embodiments of the present disclosure, Figure 5 A schematic diagram of a method for preparing a display module is provided. Figure 5 As shown, the following steps may be specifically included:
[0069] Step 501: Provide a display panel with a patterned cathode layer and a plurality of pixel units. The patterned cathode layer includes a plurality of pixel regions and a connection region, wherein the pixel regions correspond to the pixel units one by one, and the connection region is used to connect the pixel regions so that there is at least one connection path between any two pixel regions. The relevant technical features have been specifically explained and illustrated in the above-mentioned display module embodiment, and will not be repeated here.
[0070] Step 502: Prepare an encapsulation layer on the patterned cathode layer.
[0071] Step 503: Prepare a patterned black photoresist layer on the encapsulation layer so that the orthographic projection of the black photoresist covered area on the display panel covers the connection area.
[0072] Step 504: Prepare a patterned color photoresist layer on the patterned black photoresist layer, so that the orthographic projection of the color photoresist coverage area on the display panel covers the area occupied by all pixel units.
[0073] In the above embodiment, further, Figure 5 As shown, the method may further include step 505: preparing a protective layer on the patterned color photoresist layer. Based on the relevant description in the above embodiments, covering the patterned color photoresist layer and the patterned black photoresist layer with a protective layer can improve the flatness, light transmittance and service life of the color film, which will not be elaborated here.
[0074] In the above embodiment, further, Figure 6 A schematic diagram of a process for providing a display panel with a patterned cathode layer and a plurality of pixel units is shown. Figure 6 As shown, in the specific implementation process of the above step 501, it may include:
[0075] Step 501a: Using a fine mask, evaporate an organic cathode patterning material on the cover layer of the display panel. Specifically, the shape of the fine mask can be consistent with the shape of the cathode covering area of the patterned cathode layer, that is, the shape of the fine mask can be as described in the above embodiment. Figure 2 or Figure 3a or Figure 3b During the evaporation process of step 501a, the organic cathode patterning material is formed in the opening area of the fine mask.
[0076] Step 501b: Evaporating a cathode material on the organic cathode patterned material to form a patterned cathode layer. It is understandable that since the cathode material cannot form a film on the organic cathode patterned material during the evaporation process, after the operation of the above step 501a using a fine mask consistent with the shape of the patterned cathode layer, the cathode material in step 501b can directly form a desired patterned shape after the evaporation is completed.
[0077] In the above embodiment, further, in the specific implementation process of the above step 504, it can include: sequentially preparing a patterned red photoresist layer, a patterned green photoresist layer and a patterned blue photoresist layer on the patterned black photoresist layer, wherein: the orthographic projection of the patterned red photoresist layer on the display panel corresponds to the distribution position of the red pixel unit; the orthographic projection of the patterned green photoresist layer on the display panel corresponds to the distribution position of the green pixel unit; the orthographic projection of the patterned blue photoresist layer on the display panel corresponds to the distribution position of the blue pixel unit, so as to realize the function of the COE structure to improve the light transmittance effect of the display screen.
[0078] In some embodiments of the present disclosure, a display device is further provided. The display device is equipped with the display module provided by the aforementioned embodiments, which will not be described in detail here.
[0079] In summary, through the technical solution provided by the present invention, a patterned COE (Color filter On Encapsulation) structure is provided. Through the design of the patterned display panel cathode, the patterned shapes of the black photoresist layer and the color photoresist layer in the COE structure are determined, so that the optimized patterned COE structure can effectively reduce the reflectivity of the display panel while reducing the coverage area of the light and color photoresist layer at the edge of the pixel, thereby improving the viewing angle brightness attenuation of the panel and enhancing the user experience.
[0080] The above content is a further detailed description of the present disclosure in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the present disclosure is limited to these descriptions. For ordinary technicians in the technical field to which the present disclosure belongs, several simple deductions or substitutions can be made without departing from the concept of the present disclosure, which should be regarded as falling within the scope of protection of the present disclosure.
Claims
1. A display module, characterized in that: It includes a display panel, an encapsulation layer, a patterned black photoresist layer and a patterned color photoresist layer stacked in sequence; The display panel includes a plurality of pixel units and a patterned cathode layer, wherein the patterned cathode layer includes a plurality of pixel regions and a connection region, wherein: The pixel regions correspond to the pixel units one by one, and the orthographic projection of each pixel region covers the area occupied by the corresponding pixel unit; The connection area is used to connect the pixel areas so that there is at least one connection path between any two pixel areas; The orthographic projection of the black photoresist coverage area of the patterned black photoresist layer on the display panel covers the connection area; The orthographic projection of the color photoresist coverage area of the patterned color photoresist layer on the display panel covers the area occupied by all the pixel units.
2. The display module according to claim 1, wherein: The gap regions of the patterned cathode layer are covered by an organic cathode patterning material.
3. The display module according to claim 1, wherein: The orthographic projection of the pixel area coincides with the area occupied by the corresponding pixel unit.
4. The display module according to claim 1, wherein: The connection area includes a plurality of connection belts; The width of the connecting strip is smaller than the shortest side length of the pixel unit; Each of the connecting strips is disposed between two adjacent pixel regions.
5. The display module according to claim 4, characterized in that: The black photoresist covering area includes a plurality of black photoresist strips, and the black photoresist strips correspond to the connecting strips one by one; The width of the black photoresist band is greater than or equal to the width of the connecting band.
6. A method for preparing a display module, characterized in that: The steps include: A display panel with a patterned cathode layer and a plurality of pixel units is provided, wherein the patterned cathode layer comprises a plurality of pixel regions and a connection region, the pixel regions correspond to the pixel units one by one, and the connection region is used to connect the pixel regions so that at least one connection path exists between any two of the pixel regions; preparing an encapsulation layer on the patterned cathode layer; Preparing a patterned black photoresist layer on the encapsulation layer so that the orthographic projection of the black photoresist coverage area on the display panel covers the connection area; A patterned color photoresist layer is prepared on the patterned black photoresist layer, so that the orthographic projection of the color photoresist coverage area on the display panel covers the area occupied by all the pixel units.
7. The method for preparing a display module according to claim 6, wherein: The process of providing a display panel with a patterned cathode layer and a plurality of pixel units includes: Using a fine mask, evaporating an organic cathode patterning material on the cover layer of the display panel; Vapor depositing a cathode material on the organic cathode patterning material to form a patterned cathode layer; The fine mask and the cathode coverage area of the patterned cathode layer are consistent.
8. The method for preparing a display module according to claim 6, wherein: The process of preparing the patterned color photoresist layer on the patterned black photoresist layer includes: Sequentially preparing a patterned red photoresist layer, a patterned green photoresist layer and a patterned blue photoresist layer on the patterned black photoresist layer; The orthographic projection of the patterned red photoresist layer on the display panel corresponds to the distribution position of the red pixel unit; The orthographic projection of the patterned green photoresist layer on the display panel corresponds to the distribution position of the green pixel unit; The orthographic projection of the patterned blue photoresist layer on the display panel corresponds to the distribution position of the blue pixel units.
9. The method for preparing a display module according to claim 6, wherein: The preparation method further comprises: A protective layer is prepared on the patterned color photoresist layer.
10. A display device, characterized in that: The invention comprises a display module as claimed in any one of claims 1 to 5.