Display module, display device and detection method of display module

Abstract

The application discloses a display module, a display device and a detection method of the display module. The display module has a display area, and comprises a substrate, a pixel definition layer and an indication unit. The pixel definition layer is located on one side of the substrate, and a plurality of display units arranged in an array in the display area are arranged on the pixel definition layer. The indication unit is located on the same side of the substrate as the pixel definition layer, and a plurality of indication units enclose an indication pattern. In the thickness direction of the display module, the orthographic projection of the display unit on the substrate is located within the orthographic projection of the indication pattern on the substrate, and the display area coincides with at least part of the edge of the indication pattern. The display module disclosed by the application has the display unit at the edge of the display area within the range of the indication pattern. The indication pattern can be used as a reference value of the detection area in the detection process, so that the detection device can identify the burnt display unit at the edge of the display area, and the detection accuracy is improved.

Description

Technical Field

[0001] This application belongs to the field of display technology, and in particular relates to display modules, display devices, and methods for testing display modules. Background Technology

[0002] Organic light-emitting diode (OLED) displays have many advantages, such as self-illumination, short response time, and high clarity and contrast, while also ensuring a certain degree of flexibility and adaptability.

[0003] During the testing of OLED products, it is usually necessary to illuminate the display area to identify burned display units within the display area. However, since other parts such as the substrate also reflect light, in order to ensure the accuracy of grasping the detection area, the brightness detection threshold of the recognition device is usually increased. This causes the detection area of ​​the OLED product to shrink inward, resulting in the inability to detect burned display units on the outermost part of the display area. Consequently, defective products flow to the later stages, causing losses. Summary of the Invention

[0004] This application provides a display module, a display device, and a method for detecting display modules, which can identify burnt display units at the edge of the display area.

[0005] This application provides a display module with a display area. The display module includes a substrate, a pixel definition layer, and indicator units. The pixel definition layer is located on one side of the substrate, and multiple display units are arranged in an array on the pixel definition layer within the display area. The indicator units are located on the same side of the substrate as the pixel definition layer, and the multiple indicator units surround to form an indicator pattern. In the thickness direction of the display module, the orthographic projection of the display units on the substrate is located within the orthographic projection of the indicator pattern on the substrate, and the display area coincides with at least a portion of the edge of the indicator pattern.

[0006] According to an embodiment of the first aspect of this application, the indicator unit includes a first indicator unit and a second indicator unit distributed at intervals along a first direction. In the thickness direction, the edge of the display area at least partially coincides with the line connecting the first indicator unit and the second indicator unit, and the first direction intersects the thickness direction.

[0007] According to an embodiment of the first aspect of this application, the indicator unit further includes a third indicator unit, the third indicator unit and the first indicator unit being spaced apart along a second direction, and in the thickness direction, the edge of the display area at least partially coincides with the line connecting the first indicator unit and the third indicator unit, and the first direction, the second direction and the thickness direction intersect each other; optionally, the indicator unit further includes a fourth indicator unit, the third indicator unit and the fourth indicator unit being spaced apart along a first direction, the second indicator unit and the fourth indicator unit being spaced apart along a second direction, and in the thickness direction, the edge of the display area at least partially coincides with the line connecting the third indicator unit and the fourth indicator unit.

[0008] According to an embodiment of the first aspect of this application, the indicator unit is located in the pixel definition layer; optionally, the display module further includes a first circuit layer and a second circuit layer located on both sides of the pixel definition layer, wherein in the thickness direction, the orthographic projection of the indicator unit on the substrate is located outside the orthographic projection of the first circuit layer on the substrate, and / or the orthographic projection of the indicator unit on the substrate is located outside the orthographic projection of the second circuit layer on the substrate.

[0009] According to an embodiment of the first aspect of this application, a dielectric layer is further included, which is located between the substrate and the pixel definition layer or on the side of the pixel definition layer away from the substrate, and the indicator unit is located in the dielectric layer.

[0010] On the other hand, embodiments of this application also provide a display device, including the display module of any of the above embodiments.

[0011] On the other hand, embodiments of this application also provide a method for detecting a display module, used to detect the above-mentioned display module, the display area including a border area and a central area enclosed by the border area, the detection method including: identifying indicator units, defining the indicator pattern formed by the indicator units as a first image; lighting up the display units; identifying the light-emitting area of ​​the display module, defining the area with brightness greater than a first threshold as the light-emitting area, defining the light-emitting area as a second image, the brightness of the first threshold being less than the brightness of the display units in the border area; taking the intersection of the first image and the second image to obtain a third image, all display units in the border area being located in the third image; identifying damaged display units in the third image.

[0012] According to an embodiment of the third aspect of this application, the step of identifying an indicator unit and defining the indicator pattern formed by the indicator unit as a first image includes: moving a detection device to the side of the indicator unit away from the substrate; turning on an external light source to illuminate the indicator unit; the detection device acquiring the indicator pattern of the indicator unit under the illumination of the external light source and defining the indicator pattern as the first image.

[0013] According to an embodiment of the third aspect of this application, the step of identifying the light-emitting area of ​​a display module and defining the light-emitting area as a second image includes: moving a detection device to the side of the display unit away from the substrate; the detection device identifying the display module, defining the area with a brightness greater than a first threshold as the light-emitting area, and defining the light-emitting area as the second image, wherein the brightness of the first threshold is less than the brightness of the display unit within the border area.

[0014] According to an embodiment of the third aspect of this application, the step of identifying a damaged display unit in a third image includes: a detection device identifying the third image and defining a region with a brightness less than a second threshold as the location of the damaged display unit, wherein the second threshold is greater than a first threshold.

[0015] The display module of this application embodiment has a display area. The display module includes a substrate, a pixel definition layer, and indicator units. The pixel definition layer is located on one side of the substrate, and multiple display units are arranged in an array on the pixel definition layer within the display area. The indicator units are located on the same side of the substrate as the pixel definition layer. The multiple indicator units surround and form an indicator pattern. In the thickness direction of the display module, by making the orthographic projection of the display unit on the substrate fall within the orthographic projection of the indicator pattern on the substrate, and by coinciding with at least a portion of the edges of the display area and the indicator pattern, the display units at the edge of the display area are also within the range of the indicator pattern. The indicator pattern can serve as a reference value for the detection area during the detection process, enabling the detection device to identify burned display units at the edge of the display area, thereby improving the detection accuracy. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a top view of the display module structure according to some embodiments of this application;

[0018] Figure 2 An example is shown. Figure 1 The image shows a sectional view of the module at section AA;

[0019] Figure 3 Another example is shown Figure 1 The image shows a sectional view of the module at section AA;

[0020] Figure 4 This shows yet another example. Figure 1 The image shows a sectional view of the module at section AA;

[0021] Figure 5 Another example is shown. Figure 1 The image shows a sectional view of the module at section AA;

[0022] Figure 6 This is a flowchart of a method for detecting a display module according to some embodiments of this application;

[0023] Figure 7 A flowchart illustrating another example of a detection method for a display module;

[0024] Figure 8 A flowchart illustrating another example of a detection method for a display module is shown.

[0025] Figure label:

[0026] 10. Substrate;

[0027] 20. Pixel definition layer; 21. Display unit;

[0028] 30. Indicator unit; 31. First indicator unit; 32. Second indicator unit; 33. Third indicator unit; 34. Fourth indicator unit;

[0029] 40. First circuit layer; 50. Second circuit layer; 60. Dielectric layer;

[0030] A1, Display area; AA1, Border area; AA2, Central area; A2, Indicator pattern; A2, First image; A3, Second image;

[0031] x, the thickness direction of the display module; y, the first direction; z, the second direction. Detailed Implementation

[0032] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0034] The applicant discovered that in related technologies, when inspecting OLED products, it is usually necessary to illuminate the display area to identify burned display units within the display area. However, since other parts such as the substrate also reflect light, in order to ensure the accuracy of grasping the detection area, the brightness detection threshold of the identification device is usually increased, causing the detection area of ​​the OLED product to shrink inward. As a result, when burned display units on the outermost part of the display area are not detected, defective products flow to the later stages, causing losses.

[0035] In view of the above problems, the applicant proposes a display module having a display area. The display module includes a substrate, a pixel definition layer, and indicator units. The pixel definition layer is located on one side of the substrate, and multiple display units are arranged in an array on the pixel definition layer within the display area. The indicator units are located on the same side of the substrate as the pixel definition layer, and the multiple indicator units surround to form an indicator pattern. In the thickness direction of the display module, the orthographic projection of the display units on the substrate is located within the orthographic projection of the indicator pattern on the substrate, and the display area coincides with at least a portion of the edge of the indicator pattern.

[0036] The display module provided in this application has a display area. The display module includes a substrate, a pixel definition layer, and indicator units. The pixel definition layer is located on one side of the substrate, and multiple display units are arranged in an array on the pixel definition layer within the display area. The indicator units are located on the same side of the substrate as the pixel definition layer, and the multiple indicator units surround to form an indicator pattern. In the thickness direction of the display module, by making the orthographic projection of the display unit on the substrate within the orthographic projection of the indicator pattern on the substrate, and by aligning at least a portion of the edges of the display area with the indicator pattern, and by including the display units at the edge of the display area within the range of the indicator pattern, the indicator pattern can serve as a reference value for the detection area during the detection process, enabling the detection device to identify burned display units at the edge of the display area, thereby improving the detection accuracy.

[0037] The supporting device and display device provided in the embodiments of this application will now be described with reference to the accompanying drawings. It should be noted that the x-direction in the drawings represents the thickness direction of the display module, the y-direction represents a first direction, and the z-direction represents a second direction. In the drawings, for ease of drawing, the dimensions are not necessarily proportional to the actual dimensions, and some layer structures in the display module are not shown, such as TFTs, insulating layers, and planarization layers.

[0038] Please refer to Figure 1 and Figure 2 , Figure 1 This is a top view of the display module structure according to some embodiments of this application; Figure 2 An example is shown. Figure 1 The image shows a cross-sectional view of the module at section AA.

[0039] like Figure 1 and Figure 2 As shown, this application provides a display module with a display area A1. The display module includes a substrate 10, a pixel definition layer 20, and indicator units 30. The pixel definition layer 20 is located on one side of the substrate 10, and a plurality of display units 21 arranged in an array within the display area A1 are provided on the pixel definition layer 20. The indicator units 30 are located on the same side of the substrate 10 as the pixel definition layer 20, and the plurality of indicator units 30 surround to form an indicator pattern A2. In the thickness direction of the display module (x direction in the figure), the orthographic projection of the display units 21 on the substrate 10 lies within the orthographic projection of the indicator pattern A2 on the substrate 10, and at least a portion of the edges of the display area A1 and the indicator pattern A2 coincide.

[0040] Optionally, in the thickness direction x, the orthographic projection of the display area A1 onto the substrate 10 lies within the orthographic projection of the indicator pattern A2 onto the substrate 10. The indicator unit 30 may be located in the pixel definition layer 20 or in other layers. The material of the indicator unit 30 may be the same as or different from the material of the display unit 21.

[0041] Optionally, the display area A1 has a rectangular shape with rounded corners in the vertical thickness direction x. The display area A1 includes a border area AA1 at the edge and a central area AA2 enclosed by the border area AA1. The brightness of the display units 21 within the border area AA1 is less than the brightness of the display units 21 within the central area AA2. Specifically, the display units 21 located within the border area AA1 with an area greater than 50% of their total area are designated as display units 21 within the border area AA1, and the display units 21 located within the central area AA2 with an area greater than 50% of their total area are designated as display units 21 within the central area AA2.

[0042] Optionally, during the detection process, the indicator pattern A2 can be used as a reference range for the detection area. For example, the indicator pattern A2 can be defined as the first image A2, the luminous area generated after the display unit 21 is lit can be defined as the second image A3, and the intersection of the first image A2 and the second image A3 can be used to obtain the third image, which can be used as the detection area of ​​the detection device. Since the indicator pattern A2 serves as a reference range for the detection area, the brightness threshold of the second image A3 can be adjusted to be lower than the luminous brightness of the display unit 21 within the border area AA1, thereby allowing the second image A3 to cover all display units 21 within the border area AA1. When the brightness threshold of the second image A3 is defined to be lower than the luminous brightness of the display unit 21 within the border area AA1, the reflective area around the display area A1 will also be covered within the second image A3.

[0043] The display module provided in this embodiment has a display area A1. The display module includes a substrate 10, a pixel definition layer 20, and an indicator unit 30. The pixel definition layer 20 is located on one side of the substrate 10. A plurality of display units 21 are arranged in an array on the pixel definition layer 20 within the display area A1. The indicator unit 30 is located on the same side of the substrate 10 as the pixel definition layer 20. The plurality of indicator units 30 surround to form an indicator pattern A2. In the thickness direction x of the display module, by making the orthographic projection of the display unit 21 on the substrate 10 within the orthographic projection of the indicator pattern A2 on the substrate 10, and by making at least a portion of the edges of the display area A1 and the indicator pattern A2 coincide, the display unit 21 at the edge of the display area A1 is also within the range of the indicator pattern A2. The indicator pattern A2 can be used as a reference value for the detection area during the detection process, so that the detection device can identify the burned display unit 21 at the edge of the display area A1, thereby improving the detection accuracy.

[0044] In some optional embodiments, the indicator unit 30 includes first indicator units 31 and second indicator units 32 spaced apart along a first direction (y-direction in the figure). In the thickness direction x, the edge of the display area A1 at least partially coincides with the line connecting the first indicator unit 31 and the second indicator unit 32, and the first direction y intersects the thickness direction x.

[0045] In some optional embodiments, the indicator unit 30 further includes a third indicator unit 33, which is spaced apart from the first indicator unit 31 along a second direction (the z-direction in the figure). In the thickness direction x, the edge of the display area A1 at least partially coincides with the line connecting the first indicator unit 31 and the third indicator unit 33, and the first direction y, the second direction z, and the thickness direction x intersect each other.

[0046] Optionally, the indicator unit 30 further includes a fourth indicator unit 34. The third indicator unit 33 and the fourth indicator unit 34 are spaced apart along a first direction y, and the second indicator unit 32 and the fourth indicator unit 34 are spaced apart along a second direction z. In the thickness direction x, the edge of the display area A1 at least partially coincides with the line connecting the third indicator unit 33 and the fourth indicator unit 34, and the edge of the display area A1 at least partially coincides with the line connecting the second indicator unit 32 and the fourth indicator unit 34.

[0047] The display module provided in this embodiment has a display area A1 with rounded corners in the vertical thickness direction x, which is a rectangular shape. The orthographic projections of the four indicator units 30 in the thickness direction x are located at the intersection of the length and width edges of the orthographic projections of the display area A1 in the thickness direction x. The orthographic projection of the indicator pattern A2 formed by the four indicator units 30 in the thickness direction x can completely cover the orthographic projection of the display area A1. This allows the detection device to identify the burnt display unit 21 at the edge of the display area A1, while also minimizing the number of indicator units 30 and reducing their manufacturing cost. Furthermore, the four edges of the indicator pattern A2 at least partially overlap with the edges of the display area A1, limiting the area of ​​the indicator pattern A2 and improving the detection accuracy during the detection process.

[0048] In some alternative embodiments, the indicator unit 30 is located in the pixel definition layer 20.

[0049] Optionally, both the indicator unit 30 and the display unit 21 are located in the pixel definition layer 20, and the indicator unit 30 and the display unit 21 are made of the same material.

[0050] The display module provided in this embodiment arranges the indicator unit 30 and the display unit 21 on the same layer, and the indicator unit 30 and the display unit 21 are made of the same material, which reduces the manufacturing cost of the display module and simplifies the manufacturing process of the display module.

[0051] Please refer to Figures 2 to 4 , Figure 3 Another example is shown Figure 1 The image shows a sectional view of the module at section AA; Figure 4 This shows yet another example. Figure 1 The image shows a cross-sectional view of the module at section AA.

[0052] like Figures 2 to 4 As shown, in some optional embodiments, the display module further includes a first circuit layer 40 and a second circuit layer 50 located on both sides of the pixel definition layer 20. In the thickness direction x, the orthographic projection of the indicator unit 30 on the substrate 10 is outside the orthographic projection of the first circuit layer 40 on the substrate 10, and / or, the orthographic projection of the indicator unit 30 on the substrate 10 is outside the orthographic projection of the second circuit layer 50 on the substrate 10.

[0053] Optionally, in the thickness direction x, the orthographic projection of the indicator unit 30 on the substrate 10 is located outside the orthographic projection of the first circuit layer 40 on the substrate 10, and the orthographic projection of the indicator unit 30 on the substrate 10 is located within the orthographic projection of the second circuit layer 50 on the substrate 10, such as... Figure 2 As shown. Alternatively, the orthographic projection of the indicator unit 30 on the substrate 10 is outside the orthographic projection of the second circuit layer 50 on the substrate 10, and the orthographic projection of the indicator unit 30 on the substrate 10 is inside the orthographic projection of the first circuit layer 40 on the substrate 10, as shown. Figure 3 As shown. Alternatively, the orthographic projection of the indicator unit 30 on the substrate 10 may be outside the orthographic projection of the second circuit layer 50 on the substrate 10, and the orthographic projection of the indicator unit 30 on the substrate 10 may be outside the orthographic projection of the first circuit layer 40 on the substrate 10, as shown. Figure 4 As shown.

[0054] Optionally, one of the first circuit layer 40 and the second circuit layer 50 is a positive circuit layer and the other is a negative circuit layer. The first circuit layer 40 and the second circuit layer 50 are used to power the display unit 21. The indicator unit 30 is only used as a reference value for the detection area during the detection process and does not need to be connected to the circuit to emit light. Therefore, the indicator unit 30 can be unconnected to the first circuit layer 40 and / or the second circuit layer 50, and the orthogonal projection of the first circuit layer 40 and / or the second circuit layer 50 in the thickness direction x does not need to cover the indicator unit 30.

[0055] In the display module provided in this embodiment, the orthographic projection of the indicator unit 30 on the substrate 10 is located outside the orthographic projection of the first circuit layer 40 on the substrate 10, and / or, the orthographic projection of the indicator unit 30 on the substrate 10 is located outside the orthographic projection of the second circuit layer 50 on the substrate 10, thereby reducing the area of ​​the circuit layer and thus reducing the manufacturing cost of the display module.

[0056] Please refer to Figure 5 , Figure 5 Another example is shown. Figure 1 The image shows a cross-sectional view of the module at section AA.

[0057] like Figure 5 As shown, in some optional embodiments, the display module further includes a dielectric layer 60, which is located between the substrate 10 and the pixel definition layer 20 or on the side of the pixel definition layer 20 away from the substrate 10, and the indicator unit 30 is located on the dielectric layer 60.

[0058] Optionally, the material of the indicator unit 30 can be the same as or different from that of the display unit 21. When the material of the indicator unit 30 is the same as that of the display unit 21, the external light source on the detection device can be a white light source. After the detection device recognizes the indicator unit 30 reflecting the white light source, it defines the indicator pattern A2 as the first image A2.

[0059] Optionally, when the material of the indicator unit 30 is different from that of the display unit 21, for example, the indicator unit 30 can be made of fluorescent material, and the external light source on the detection device can be an excitation light source that matches the fluorescent material. After the indicator unit 30 is irradiated by the excitation light source on the detection device, it emits fluorescence and is recognized by the detection device. Then the detection device defines the indicator pattern A2 as the first image A2.

[0060] The display module provided in this embodiment uses different materials to make the indicator unit 30 and the display unit 21. The detection device can use an excitation light source that matches the indicator unit 30 as an external light source, so that the detection device will only recognize the indicator unit 30, reducing the influence of the indicator unit 21 on the recognition of the first image A2, and further improving the detection accuracy of the detection device.

[0061] In summary, the display module provided in this embodiment has a display area A1. The display module includes a substrate 10, a pixel definition layer 20, and an indicator unit 30. The pixel definition layer 20 is located on one side of the substrate 10, and multiple display units 21 arranged in an array within the display area A1 are provided on the pixel definition layer 20. The indicator unit 30 is located on the same side of the substrate 10 as the pixel definition layer 20. The multiple indicator units 21 surround to form an indicator pattern A2. In the thickness direction x of the display module, by making the orthographic projection of the display unit 21 on the substrate 10 fall within the orthographic projection of the indicator pattern A2 on the substrate 10, the display units 21 at the edge of the display area A1 are also within the range of the indicator pattern A2. The indicator pattern A2 can serve as a reference value for the detection area during the detection process, enabling the detection device to identify the burned display units 21 at the edge of the display area A1, thereby improving the detection accuracy.

[0062] The second aspect of this application also provides a display device, including the display module of any of the first aspect embodiments described above. Since the display device provided in the second aspect of this application includes the display module of any of the first aspect embodiments described above, it has the beneficial effects of the display module of any of the first aspect embodiments described above, which will not be elaborated further here.

[0063] The display devices in this application include, but are not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0064] Please refer to Figure 6 , Figure 6 This is a flowchart illustrating a method for detecting a display module according to some embodiments of this application.

[0065] like Figure 6 As shown, an embodiment of the third aspect of this application also provides a method for detecting a display module, used to detect a display module as provided in the embodiment of the first aspect of this application, the detection method comprising:

[0066] Step S01: Identify the indicator unit 30 and define the indicator pattern A2 formed by the indicator unit 30 as the first image A2.

[0067] Step S02: Turn on display unit 21.

[0068] Step S03: Identify the light-emitting area of ​​the display module, define the area with brightness greater than the first threshold as the light-emitting area, define the light-emitting area as the second image A3, and the brightness of the first threshold is less than the brightness of the display unit 21 in the border area AA1.

[0069] Step S04: The intersection of the first image A2 and the second image A3 is used to obtain the third image, and all display units 21 within the border area AA1 are located within the third image.

[0070] Step S05: Identify the damaged display unit 21 in the third image.

[0071] Optionally, in step S03, when the detection device identifies the light-emitting area of ​​the display module, it adjusts the brightness threshold for defining the light-emitting area to be lower than the brightness of the display unit 21 within the border area AA1, and even identifies the reflective area outside the display unit 21 as the light-emitting area, thereby expanding the range of the second image A3 to cover all display units 21 within the border area AA1.

[0072] Optionally, in step S03, the detection device can also define the light-emitting area of ​​the display module by recognizing other features such as the shape, color, and electrical signals of the display module.

[0073] The detection method for the display module provided in this embodiment includes: identifying the indicator unit 30 and defining the indicator pattern A2 formed by the indicator unit 30 as the first image A2; identifying the light-emitting area of ​​the display module and defining the light-emitting area as the second image A3; by taking the intersection of the first image A2 and the second image A3, both the first image A2 and the second image A3 cover all the display units 21, so that the detection device can identify the burned display units 21 at the edge of the display area A1, thereby improving the detection accuracy.

[0074] Please refer to Figure 7 , Figure 7 A flowchart illustrating another example of a detection method for a display module is shown.

[0075] like Figure 7 As shown, in some optional embodiments, step S01 includes:

[0076] Step S011: Move the detection device to the side of the indicator unit 30 away from the substrate 10.

[0077] Step S012: Turn on the external light source illumination indicator unit 30.

[0078] In step S013, the detection device acquires the indicator pattern A2 of the indicator unit 30 under external light source illumination, and defines the indicator pattern A2 as the first image A2.

[0079] Optionally, when the material of the indicator unit 30 is the same as that of the display unit 21, the external light source on the detection device can be a white light source. After the detection device recognizes the indicator unit 30 that reflects the white light source, it defines the indicator pattern A2 as the first image A2.

[0080] Optionally, when the material of the indicator unit 30 is different from that of the display unit 21, for example, the indicator unit 30 can be made of fluorescent material, and the external light source on the detection device can be an excitation light source that matches the fluorescent material. After the indicator unit 30 is irradiated by the excitation light source on the detection device, it emits fluorescence and is recognized by the detection device. Then the detection device defines the indicator pattern A2 as the first image A2.

[0081] The detection method for the display module provided in this embodiment allows the indicator unit 30 and the display unit 21 to be made of different materials. The detection device can use an excitation light source that matches the indicator unit 30 as an external light source, thereby enabling the detection device to only identify the indicator unit 30, reducing the influence of the display unit 21 on the identification of the first image A2, and further improving the detection accuracy of the detection device.

[0082] Please refer to Figure 8 , Figure 8 A flowchart illustrating another example of a detection method for a display module is shown.

[0083] like Figure 8 As shown, in some optional embodiments, step S03 includes:

[0084] Step S031: Move the detection device to the side of the display unit 21 away from the substrate 10.

[0085] In step S032, the detection device identifies the display module, defines the area with brightness greater than the first threshold as the light-emitting area, and defines the light-emitting area as the second image A3. The brightness of the first threshold is less than the brightness of the display unit 21 in the border area AA1.

[0086] Optionally, in step S032, the first threshold is less than the brightness of the display unit 21 within the border area AA1, and the brightness of the display unit 21 within the border area AA1 is less than the brightness of the display unit 21 within the central area AA2. When the first threshold is sufficiently small, a larger reflective area will also be identified as the second image A3. At this time, in the thickness direction x, the orthographic projection of the first image A2 on the substrate 10 is completely within the orthographic projection of the second image A3 on the substrate 10. The third image obtained by taking the intersection of the first image A2 and the second image A3 is the first image A2.

[0087] The display module detection method provided in this embodiment allows the detection device to cover all display units 21 when defining the second image A3 by making the first threshold less than the brightness of the display unit 21 within the border area AA1. This enables the detection device to identify the burned display unit 21 at the edge of the display area A1, thereby improving the detection accuracy.

[0088] In some optional embodiments, step S05 includes: the detection device identifying a third image and defining the area with brightness less than a second threshold as the location of the damaged display unit, wherein the second threshold is greater than a first threshold.

[0089] Optionally, the second threshold is greater than the first threshold, and the second threshold is less than the brightness of the display unit 21 within the border area AA1.

[0090] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A display module having a display area, characterized in that, The display module includes: substrate; A pixel definition layer is located on one side of the substrate, and a plurality of display units are arranged in an array in the display area on the pixel definition layer; The indicator unit is located on the same side of the substrate as the pixel definition layer. A plurality of indicator units are arranged to form an indicator pattern. In the thickness direction of the display module, the orthographic projection of the display unit on the substrate is located within the orthographic projection of the indicator pattern on the substrate. The display area coincides with at least a portion of the edge of the indicator pattern.

2. The display module according to claim 1, characterized in that, The indicator unit includes a first indicator unit and a second indicator unit spaced apart along a first direction. In the thickness direction, the edge of the display area at least partially coincides with the line connecting the first indicator unit and the second indicator unit. The first direction intersects the thickness direction.

3. The display module according to claim 2, characterized in that, The indicator unit further includes a third indicator unit, which is distributed at intervals with the first indicator unit along the second direction. In the thickness direction, the edge of the display area at least partially coincides with the line connecting the first indicator unit and the third indicator unit. The first direction, the second direction, and the thickness direction intersect each other.

4. The display module according to claim 3, characterized in that, The indicator unit further includes a fourth indicator unit. The third and fourth indicator units are spaced apart along the first direction, and the second and fourth indicator units are spaced apart along the second direction. In the thickness direction, the edge of the display area at least partially coincides with the line connecting the third and fourth indicator units.

5. The display module according to claim 1, characterized in that, The indicator unit is located in the pixel definition layer.

6. The display module according to claim 5, characterized in that, The display module further includes a first circuit layer and a second circuit layer located on both sides of the pixel definition layer. In the thickness direction, the orthographic projection of the indicator unit on the substrate is located outside the orthographic projection of the first circuit layer on the substrate, and / or the orthographic projection of the indicator unit on the substrate is located outside the orthographic projection of the second circuit layer on the substrate.

7. The display module according to claim 1, characterized in that, It also includes a dielectric layer, which is located between the substrate and the pixel definition layer or on the side of the pixel definition layer away from the substrate, and the indicator unit is located in the dielectric layer.

8. A display device, characterized in that, Includes the display module as described in any one of claims 1-7.

9. A method for detecting a display module, used to detect a display module as described in any one of claims 1-7, wherein the display area includes a border area and a central area enclosed by the border area, characterized in that, include: Identify the indicator unit, and define the indicator pattern formed by the indicator unit as a first image; Light up the display unit; Identify the light-emitting area of ​​the display module, define the area with brightness greater than a first threshold as the light-emitting area, define the light-emitting area as the second image, and the brightness of the first threshold is less than the brightness of the display unit in the border area; The intersection of the first image and the second image is used to obtain the third image, and all display units within the border area are located within the third image. Identify the damaged display unit in the third image.

10. The method for detecting a display module according to claim 9, characterized in that, The step of identifying the indicator unit and defining the indicator pattern formed by the indicator unit as a first image includes: Move the detection device to the side of the indicating unit that is away from the substrate; Turn on an external light source to illuminate the indicator unit; The detection device acquires the indication pattern of the indication unit under the illumination of the external light source, and defines the indication pattern as a first image.

11. The method for detecting a display module according to claim 9, characterized in that, The step of identifying the luminous area of ​​the display module and defining the luminous area as the second image includes: Move the detection device to the side of the display unit away from the substrate; The detection device identifies the display module, defines the area with brightness greater than a first threshold as the luminous area, and defines the luminous area as the second image. The brightness of the first threshold is less than the brightness of the display unit within the border area.

12. The method for detecting a display module according to claim 11, characterized in that, The step of identifying the damaged display unit in the third image includes: The detection device identifies the third image and defines the area with brightness less than a second threshold as the location of the damaged display unit, where the second threshold is greater than the first threshold.

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