Display panel detection method and display panel

Abstract

The present application provides a display panel detection method and display panel, the method comprising: selecting at least one target area in a display image of the display panel where the number of dark spots is less than a preset threshold; determining, for the target area, energy consumption parameters corresponding to the target area at multiple target grayscales; determining, based on the energy consumption parameters, luminous efficiency values ​​corresponding to the target area at each target grayscale; and determining whether the display panel has leakage based on the differences between the luminous efficiency values. By selecting an area of ​​the display panel with no dark spots or few dark spots as the target area, calculating the luminous efficiency values ​​of the target area at each target grayscale, and determining whether the display panel has leakage based on the differences between the luminous efficiency values, the influence of dark spots on the detection results can be eliminated, thereby improving detection accuracy.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel detection method and a display panel. Background Art

[0002] Organic light-emitting diodes (OLEDs) and flat-panel displays based on technologies such as light-emitting diodes (LEDs) have become a mainstream display device due to their advantages, including high image quality, power efficiency, thin design, and wide application range. They are widely used in various consumer electronic products such as mobile phones, TVs, laptops, and desktop computers. Traditionally, in the production of display panels, pixel patterning is typically achieved using a fine metal mask (FMM). While FMM technology is mature and has extensive mass production experience, it also suffers from limited precision, high development costs, and long development cycles. FMM-free technology eliminates the limitations of traditional OLED processes on display size, resolution, and other performance characteristics, offering the advantages of high performance, full-scale scalability, and agile delivery. Patents CN118251982A, CN116648095A, CN117062489A, CN118742138A, CN118678783A, CN118660598A, CN118675450A, CN118824188A, and CN118781966A describe the non-fine metal mask technology for reference.

[0003] However, the performance of current OLED display products needs to be improved. Summary of the Invention

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the present application aims to provide a display panel detection method, the method comprising:

[0005] Selecting at least one target area in a display image of the display panel where the number of dark spots is smaller than a preset threshold;

[0006] For the target area, determining energy consumption parameters corresponding to the target area at a plurality of different target grayscales;

[0007] Determining the luminous efficiency values ​​corresponding to the target area at each target grayscale according to the energy consumption parameter;

[0008] Whether the display panel has leakage is determined according to the difference between the luminous efficiency values.

[0009] In a possible implementation, the step of selecting at least one target area in a display image of the display panel where the number of dark spots is smaller than a preset threshold includes:

[0010] At least one target area without a dark spot is selected in a display image of the display panel.

[0011] In a possible implementation, the step of selecting at least one target area in a display image of the display panel where the number of dark spots is smaller than a preset threshold includes:

[0012] At the maximum grayscale, at least one area of ​​a preset shape in which the number of dark spots is smaller than a preset threshold value is selected from the display image of the display panel as the target area.

[0013] In a possible implementation, the step of selecting at least one target area in a display image of the display panel where the number of dark spots is smaller than a preset threshold includes:

[0014] At the first grayscale, determining an area in the display image where the number of dark spots is less than a preset threshold as a test area;

[0015] At a second grayscale, determining at least two areas with different actual brightness values ​​from the test area as target areas; the second grayscale is smaller than the first grayscale;

[0016] The method further comprises:

[0017] Determining luminous efficiency curves corresponding to each target area according to the luminous efficiency values ​​corresponding to each target area at each target grayscale;

[0018] Determining the influence of different degrees of leakage on the luminous efficiency according to the luminous efficiency curves corresponding to each of the target areas;

[0019] Wherein, the first grayscale is the maximum grayscale.

[0020] In a possible implementation, the step of determining, for the target area, energy consumption parameters corresponding to the target area at a plurality of different target grayscales includes:

[0021] For at least two target areas, determining energy consumption parameters corresponding to the at least two target areas at a first target grayscale;

[0022] The first target grayscale is controlled to decrease to a second target grayscale, and energy consumption parameters corresponding to at least two target areas at the second target grayscale are determined.

[0023] In a possible implementation, the energy consumption parameter includes an actual brightness value of the target area at the target grayscale and a driving current value of the display panel at the target grayscale;

[0024] The step of determining, for the target area, energy consumption parameters corresponding to the target area at a plurality of different target grayscales includes:

[0025] For each target area, actual brightness values ​​corresponding to the target area at different target grayscales and driving current values ​​corresponding to the display panel are determined.

[0026] In a possible implementation, the step of determining, for each target area, actual brightness values ​​corresponding to the target area at different target grayscales and driving current values ​​corresponding to the display panel, includes:

[0027] For each target area, while controlling the target area to display a white screen and other areas except the target area to display a black screen, the actual brightness value corresponding to each target area and the driving current value corresponding to the display panel at each target grayscale are obtained.

[0028] In a possible implementation, the step of determining the luminous efficiency values ​​corresponding to the target area at each target grayscale according to the energy consumption parameter includes:

[0029] The luminous efficiency values ​​corresponding to each target area at a plurality of different target grayscales are calculated according to the actual brightness values ​​corresponding to each target area at each target grayscale and the driving current values ​​corresponding to each display panel.

[0030] In a possible implementation, the luminous efficiency value is calculated by the following method:

[0031]

[0032] in, Indicates the luminous efficiency value; Indicates the actual brightness value corresponding to the target area; represents the total area of ​​the display region of the display panel; Indicates the driving current value corresponding to the display panel; Indicates the transmittance of the polarizer and cover plate in the display panel.

[0033] In a possible implementation, the step of determining whether the display panel has leakage according to the difference in the luminous efficiency values ​​includes:

[0034] Determine a first luminous efficiency value corresponding to the larger target grayscale and a second luminous efficiency value corresponding to the smaller target grayscale of any two target grayscales;

[0035] determining whether there is leakage in the display panel according to a ratio of the second luminous efficiency value to the first luminous efficiency value;

[0036] like , then there is no leakage in the display panel;

[0037] in, represents the second luminous efficiency value, Indicates the first luminous efficiency value.

[0038] Another object of the present application is to provide a display panel, which is tested by the display panel detection method provided in the present application.

[0039] In a possible implementation, the display panel includes:

[0040] substrate;

[0041] an isolation structure located on one side of the substrate, wherein the isolation structure encloses and forms a plurality of isolation openings;

[0042] A plurality of light-emitting devices, at least part of which is located in the corresponding isolation opening; the light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked in a direction away from the substrate, the isolation structure is conductive, and the second electrode is electrically connected to the isolation structure.

[0043] In a possible implementation, the isolation structure includes a supporting portion and a shielding portion located on a side of the supporting portion away from the substrate, and an orthographic projection of the supporting portion on the substrate is located within an orthographic projection of the shielding portion on the substrate.

[0044] In a possible implementation, the light-emitting functional layer includes a hole injection layer and an electroluminescent layer stacked in a direction away from the substrate.

[0045] In a possible implementation, the display panel further includes a plurality of packaging units, and the packaging units are located on a side of the corresponding light-emitting device away from the substrate.

[0046] Compared with the prior art, this application has the following beneficial effects:

[0047] The present application provides a display panel detection method and a display panel. By selecting an area with no dark spots or fewer dark spots in the display screen of the display panel as a target area, and calculating the luminous efficiency value of the target area at each target grayscale, the difference between the luminous efficiency values ​​is used to determine whether the display panel has leakage. The influence of dark spots on the detection results can be eliminated, thereby improving the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0049] Figure 1 A schematic diagram of the structure of a display panel in the prior art;

[0050] Figure 2 It is a structural schematic diagram of the target area in the prior art;

[0051] Figure 3 This is a schematic diagram of the steps of the display panel detection method provided in an embodiment of the present application;

[0052] Figure 4a This is one of the schematic diagrams of the luminous efficiency curve provided in the embodiment of the present application;

[0053] Figure 4b The second schematic diagram of the luminous efficiency curve provided in the embodiment of the present application;

[0054] Figure 5 A schematic diagram of sub-steps of step S110 provided in an embodiment of the present application;

[0055] Figure 6 A schematic diagram of the structure of the target area provided in the embodiment of the present application;

[0056] Figure 7 This is a second schematic flow chart of the steps of the display panel detection method provided in an embodiment of the present application;

[0057] Figure 8 A schematic diagram of sub-steps of step S120 provided in an embodiment of the present application;

[0058] Figure 9 A schematic diagram of sub-steps of step S140 provided in an embodiment of the present application;

[0059] Figure 10 A cross-sectional view of a display panel provided in an embodiment of the present application Figure 1 ;

[0060] Figure 11 One of the schematic diagrams of the isolation structure provided in the embodiment of the present application;

[0061] Figure 12 A second schematic diagram of the isolation structure provided in an embodiment of the present application;

[0062] Figure 13 A cross-sectional view of a display panel provided in an embodiment of the present application Figure 2 ;

[0063] Figure 14 A cross-sectional view of a display panel provided in an embodiment of the present application Figure 3 .

[0064] Icon: 111-substrate; 112-array functional layer; 120-first electrode; 130-pixel defining layer; 140-isolation structure; 900-isolation opening; 810-light-emitting device; 150-light-emitting functional layer; 151-hole injection layer; 152-electroluminescent layer; 160-second electrode; 170-packaging unit; 180-first packaging layer; 190-second packaging layer; 141-supporting part; 142-shielding part; 143-receiving part; 200-target area. DETAILED DESCRIPTION

[0065] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0066] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0067] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0068] In the description of this application, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0069] It should be noted that, in the absence of conflict, different features in the embodiments of the present application can be combined with each other.

[0070] Please refer to Figure 1 In some related display panels, an isolation structure 140' having an isolation opening 900' is provided. When evaporating a light-emitting material layer and a conductive material layer to form the light-emitting device 810' and the second electrode 160' of the light-emitting device 810', the light-emitting material layer and the conductive material layer between different isolation openings 900' can be disconnected. This allows the light-emitting functional layer 150' and the second electrode 160' of the light-emitting device 810' to be formed by full-layer evaporation followed by etching. The first electrode 120' of the light-emitting device 810' is electrically connected to the pixel driving circuit in the array functional layer 112' to obtain a light-emitting driving voltage (ELVDD). The second electrode 160' needs to be overlapped with the isolation structure 140' to provide a light-emitting common voltage (ELVSS) to the second electrode 160' through the isolation structure 140'. When there is a sufficient voltage difference between the first electrode 120' and the second electrode 160', the light-emitting functional layer 150' is driven to emit light.

[0071] Research has found that there are many dark spots in this type of display panel. Dark spots usually refer to pixels or areas in the display panel that cannot emit light normally. Figure 2 Currently, when detecting leakage of a display panel, the center area of ​​the display panel can be selected as the target area 200', and data analysis can be performed based on the actual brightness value of the target area 200' and the driving current value of the display panel. However, there may be many dark spots in the center area of ​​the display panel. These dark spots will interfere with leakage detection at low brightness and low grayscale, making the leakage measurement inaccurate.

[0072] In view of this, this embodiment provides a solution that can solve the above-mentioned problem. The solution provided by this embodiment is described in detail below.

[0073] Please refer to Figure 3 , Figure 3This is a schematic flow chart of the steps of a display panel detection method provided in this embodiment. The method may include the following steps.

[0074] In step S110 , at least one target area 200 having a number of dark spots smaller than a preset threshold is selected from the display image of the display panel.

[0075] In this embodiment, dark spot detection can be performed on the display screen of the display panel, and areas where the number of dark spots in the display panel is less than a preset threshold, that is, areas with no dark spots or few dark spots, are selected as target areas 200. Specifically, one or more target areas 200 can be selected.

[0076] For example, the preset threshold may be 10. When selecting the target area 200 , an area with a number of dark spots less than or equal to 10 may be selected as the target area.

[0077] Step S120 : for the target area 200 , determining energy consumption parameters corresponding to the target area 200 at a plurality of different target grayscales.

[0078] In this embodiment, energy consumption parameters corresponding to the target area 200 at multiple target grayscales can be obtained. These energy consumption parameters can directly represent the energy consumption of the display panel when emitting light. The energy consumption of the display panel varies when emitting light at different grayscales. When emitting light at a larger grayscale, the brightness is relatively higher, and the energy consumption of the display panel is higher; when emitting light at a smaller grayscale, the brightness is relatively lower, and the energy consumption of the display panel is lower.

[0079] Exemplarily, the target grayscale may include 255 grayscale, 126 grayscale, 96 grayscale, 80 grayscale, 48 grayscale, 32 grayscale, 24 grayscale, 16 grayscale, 12 grayscale, 8 grayscale, 5 grayscale, and the like.

[0080] Step S130 : determining the luminous efficiency values ​​corresponding to the target area 200 at each target grayscale according to the energy consumption parameter.

[0081] In this embodiment, the luminous efficiency values ​​corresponding to the target area 200 at each target grayscale can be calculated based on the energy consumption parameters obtained in step S120. For example, when the target grayscale is 255 grayscale, the energy consumption parameters of the target area 200 at 255 grayscale can be obtained first, and then the luminous efficiency value of the target area 200 at 255 grayscale can be calculated based on the energy consumption parameters of the target area 200 at 255 grayscale.

[0082] Step S140 : determining whether the display panel has leakage according to the difference between the luminous efficiency values.

[0083] Please refer to Figure 4a and Figure 4bThe inventors have found that when the display panel does not have any pixel leakage defects (leakage), the luminous efficiency of the display panel at different target grayscales is basically the same (e.g. Figure 4a However, if there is a pixel leakage defect (leakage) in the display panel, the display efficiency of the display panel will be significantly reduced at low brightness and low grayscale (as shown in the figure). Figure 4b shown).

[0084] Therefore, in step S140, based on the luminous efficiency values ​​of the display panel at each target grayscale, it can be determined whether the luminous efficiency value of the display panel has a significant decreasing trend as the target grayscale decreases, thereby determining whether the display panel has an obvious leakage problem.

[0085] Based on the above design, in the display panel detection method provided in this embodiment, by selecting an area with no dark spots or fewer dark spots in the display screen of the display panel as the target area 200, and calculating the luminous efficiency value of the target area 200 at each target grayscale, the difference between the luminous efficiency values ​​is used to determine whether there is leakage in the display panel, which can eliminate the influence of dark spots on the detection results, thereby improving the accuracy of detection.

[0086] In one possible implementation, in step S110, when selecting at least one target area 200 with no dark spots or fewer dark spots in the display image, at least one area of ​​a preset shape with a number of dark spots less than a preset threshold can be determined in the display panel at the maximum grayscale as the target area 200.

[0087] In this embodiment, the greater the grayscale value, the greater the corresponding brightness of the display panel. For example, the brightness corresponding to grayscale 255 may be 500 nit. At the maximum grayscale, the voltage used to drive the pixel to emit light is the maximum. If there are still pixels that cannot emit light normally at the maximum grayscale, it is considered that the pixel cannot be illuminated. Therefore, in order to eliminate the interference caused by dark spots on leakage detection, an area with no dark spots or fewer dark spots can be selected from the display screen of the display panel at the maximum grayscale as the target area 200. Specifically, an area with a preset shape and a preset size can be selected as the target area 200. If there are multiple target areas 200, the multiple target areas 200 have the same size. For example, the preset shape of the multiple target areas 200 can be circular, and the diameters of the multiple target areas 200 are the same.

[0088] In one possible implementation, see Figure 5 , step S110 may include the following sub-steps.

[0089] In step S111 , at a first grayscale, an area in a display image where the number of dark spots is less than a preset threshold is determined as a test area.

[0090] Step S112 : determining at least two regions with different actual brightness values ​​from the test region as the target region 200 at a second grayscale; the second grayscale is smaller than the first grayscale.

[0091] In this embodiment, dark spot detection can be performed on the display screen at a first grayscale, and multiple areas of the display screen with no dark spots or few dark spots are selected as test areas. Then, at a second grayscale, at least two areas with actual brightness differences are selected from the multiple test areas as target areas 200. The second grayscale can be smaller than the first grayscale, and the first grayscale can be the maximum grayscale. The first grayscale corresponds to a higher brightness, and the second grayscale corresponds to a lower brightness. For example, the first grayscale can be 255 grayscale, and the brightness corresponding to the first grayscale can be 500 nits, while the second grayscale can be 32 grayscale, and the brightness corresponding to the second grayscale can be 2 nits.

[0092] Specifically, at least two target areas 200 have the same size, and the size of the target area 200 can be smaller than or equal to the size of the test area. In the process of selecting the target area 200, at least two target areas 200 can be selected from one test area, or at least two target areas 200 can be selected from multiple test areas respectively, or the test areas with different actual brightness values ​​can be directly used as the target areas 200.

[0093] For some examples, see Figure 6 , three circular areas L1, L2 and L3 of the same size can be selected from multiple test areas as the target area 200, wherein the brightness of the target area L1 can be smaller than the brightness of the target areas L2 and L3, and the brightness of the target area L2 can be smaller than the brightness of the target area L3.

[0094] In the above design, by selecting the test area under the first grayscale, the influence of dark spots on the detection results can be eliminated as much as possible. At the same time, by selecting at least two target areas 200 with different actual brightness values ​​under the second grayscale, the overall leakage characteristics of the display panel can be more accurately detected, the severity of the leakage corresponding to different target areas 200 can be determined, and the display panel can be further processed.

[0095] Please refer to Figure 7 , the display panel detection method may further include the following steps.

[0096] Step S210 , determining the luminous efficiency curves corresponding to the target areas 200 according to the luminous efficiency values ​​corresponding to the target areas 200 at the target grayscales.

[0097] In this embodiment, for each target area 200, a luminous efficiency curve can be constructed according to the luminous efficiency values ​​corresponding to the target area 200 at each target grayscale, wherein the horizontal axis of the luminous efficiency curve can be the target grayscale, and the vertical axis of the luminous efficiency curve can be the luminous efficiency value.

[0098] Step S220 , determining the influence of different degrees of leakage problems on the luminous efficiency according to the luminous efficiency curves corresponding to the target areas 200 .

[0099] In this embodiment, the impact of different levels of leakage problems on the luminous efficiency can be determined based on the slope of the luminous efficiency curve corresponding to each of the target areas 200 constructed in step S210, thereby more effectively or more specifically determining the compensation parameters or compensation methods for brightness compensation of the display panel based on the impact of different levels of leakage problems on the luminous efficiency. In addition, it can also facilitate the slicing of the display panel in subsequent processes. Among them, the slope corresponding to the target area 200 with a larger leakage level changes more significantly, and the luminous efficiency value decreases faster at low grayscales. The slope corresponding to the target area 200 with a smaller leakage level changes less, and the luminous efficiency value decreases more slowly at low grayscales.

[0100] In one possible implementation, see Figure 8 , step S120 may further include the following sub-steps.

[0101] Step S121 : determining, for at least two target areas, energy consumption parameters corresponding to the at least two target areas at a first target grayscale.

[0102] In this embodiment, for the at least two target areas selected in step S112, energy consumption parameters corresponding to the at least two target areas at a first target grayscale can be obtained, wherein the first target grayscale is a starting grayscale, the starting grayscale corresponding to the at least two target areas is the same, and the brightness corresponding to the at least two target areas at the same starting grayscale is the same. For example, the first target grayscale can be grayscale 255.

[0103] Step S122 : controlling the first target grayscale to decrease to a second target grayscale, and determining energy consumption parameters corresponding to at least two target areas at the second target grayscale.

[0104] In this embodiment, for any target area, after obtaining the energy consumption parameters corresponding to the target area at the first target grayscale, the first target grayscale can be controlled to drop to the second target grayscale, thereby obtaining the energy consumption parameters corresponding to the target area at the second target grayscale. Exemplarily, the second target grayscale can be 128 grayscale.

[0105] After obtaining the energy consumption parameters corresponding to the target area at 128 grayscale, you can continue to control the target grayscale to decrease, so as to obtain the energy consumption parameters corresponding to other target grayscales (for example, 96 grayscale, 80 grayscale, 48 grayscale, 32 grayscale, 24 grayscale, 16 grayscale, 12 grayscale, 8 grayscale and 5 grayscale, etc.).

[0106] In a possible implementation, the energy consumption parameter may include an actual brightness value of the target area 200 at a target grayscale and a driving current value of the display panel at the target grayscale.

[0107] In step S120 , for each target area 200 , actual brightness values ​​corresponding to the target area 200 at different target grayscales and driving current values ​​corresponding to the display panel may be determined.

[0108] In this embodiment, for each target area 200, the actual brightness value corresponding to the target area 200 at each target grayscale and the driving current value corresponding to the display panel at each target grayscale can be obtained as the energy consumption parameter corresponding to the target area 200. For example, for a target area 200, the actual brightness value corresponding to the target area 200 at target grayscales such as 255 grayscale, 126 grayscale, 96 grayscale, 80 grayscale, 48 grayscale, 32 grayscale, 24 grayscale, 16 grayscale, 12 grayscale, 8 grayscale, and 5 grayscale, as well as the driving current value corresponding to the display panel at these grayscales can be obtained in sequence.

[0109] Specifically, for each target grayscale, the actual brightness value of the target area 200 can be detected by a photoelectric probe, and the driving current value of the display panel can also be detected by a multimeter.

[0110] In one possible implementation, when determining the actual brightness value corresponding to the target area 200 at different target grayscales and the driving current value corresponding to the display panel for each target area 200, the actual brightness value corresponding to each target area 200 at each target grayscale and the driving current value corresponding to the display panel can be obtained while controlling the target area 200 to display a white screen and other areas except the target area 200 to display a black screen.

[0111] In this embodiment, when detecting the energy consumption parameters of a target area 200, the actual brightness value corresponding to each target grayscale of the target area 200 and the driving current value of the display panel corresponding to each target grayscale can be obtained while controlling the target area 200 to display a white image and controlling the other areas except the target area 200 to display a black image. When the target area 200 is controlled to display a white image and the other areas except the target area 200 are controlled to display a black image, the voltage values ​​corresponding to each area of ​​the display panel are the same.

[0112] Specifically, the target area 200 that needs to be detected can be determined first, and then a display image in which the target area 200 is a white screen and other areas are black screens can be obtained. When the display panel displays the display image, the target grayscale is adjusted. For example, the target grayscale can be adjusted from the maximum grayscale to the minimum grayscale, so as to obtain the actual brightness value corresponding to the target area 200 at each target grayscale and the driving current value corresponding to the display panel at each target grayscale.

[0113] In one possible implementation, in step S130, when determining the luminous efficiency values ​​corresponding to the target area 200 at each target grayscale based on the energy consumption parameters, the luminous efficiency values ​​corresponding to each target area 200 at multiple different target grayscales can be calculated based on the actual brightness values ​​corresponding to the target area 200 at each target grayscale and the driving current values ​​corresponding to the display panel.

[0114] Specifically, the luminous efficiency value can be calculated as follows:

[0115]

[0116] in, Can express luminous efficiency value; It can represent the actual brightness value corresponding to the target area 200; It can represent the total area of ​​the display region of the display panel; It can indicate the driving current value corresponding to the display panel; It can represent the transmittance of polarizer and cover in display panel. The value of can be 0.45.

[0117] For example, when the target grayscale is 255 grayscale, the luminous efficiency value can be calculated by the following formula:

[0118]

[0119] in, It can represent the luminous efficiency value corresponding to 255 grayscale; It can represent the actual brightness value of the target area 200 corresponding to the 255 grayscale; It can represent the total area of ​​the display region of the display panel; It can represent the driving current value corresponding to the display panel at 255 grayscale; It can represent the transmittance of the polarizer and cover in the display panel.

[0120] Among them, for the same display panel, the total area of ​​the display area and the transmittance of the polarizer and cover Usually the same.

[0121] In one possible implementation, see Figure 9 , step S140 may include the following sub-steps.

[0122] Step S141 : determining a first luminous efficiency value corresponding to the larger target grayscale and a second luminous efficiency value corresponding to the smaller target grayscale of any two target grayscales.

[0123] Step S142 : determining whether the display panel has leakage according to the ratio of the second luminous efficiency value to the first luminous efficiency value.

[0124] In this embodiment, for each display area, whether the display panel has leakage can be determined based on the ratio between the first luminous efficiency value and the second luminous efficiency value corresponding to any two target grayscales.

[0125] Optionally, whether the display panel has leakage may be determined based on a ratio between a first luminous efficiency value and a second luminous efficiency value corresponding to two adjacent target grayscales.

[0126] In some cases, if , it means that there is no leakage in the display panel. can represent the second luminous efficiency value, For example, if the ratio of the second luminous efficiency value corresponding to the smaller target grayscale to the first luminous efficiency value corresponding to the larger target grayscale of any two target grayscales is 0.95, it indicates that there is no leakage in the display panel.

[0127] In other examples, if the ratios between the first luminous efficiency values ​​and the second luminous efficiency values ​​corresponding to any two target grayscales are close to 1, for example, the ratio between the first luminous efficiency value and the second luminous efficiency value is 0.93, then the luminous efficiency values ​​of the target area 200 at different target grayscales are substantially the same, and there is no leakage in the target area 200. If the ratio between the first luminous efficiency value and the second luminous efficiency value significantly deviates from 1, for example, the ratio between the first luminous efficiency value and the second luminous efficiency value is 0.5, then the luminous efficiency values ​​of the target area 200 at different target grayscales differ significantly, and there is leakage in the target area 200.

[0128] An embodiment of the present application further provides a display panel, which can be tested by the display panel detection method provided in this embodiment.

[0129] In one possible implementation, see Figure 10 The display panel provided in this embodiment may include a substrate 111 , an isolation structure 140 and a plurality of light-emitting devices 810 .

[0130] In this embodiment, the material of the substrate may include a rigid material, such as glass; or the material of the substrate may include a flexible material, such as polyimide (Pi).

[0131] Optionally, an array functional layer 112 may be provided on one side of the substrate. The array functional layer 112 may include multiple film layer structures, such as a buffer layer, an active layer, multiple conductive layers, multiple insulating layers, and a planarization layer. The multiple film layer structures of the array functional layer 112 may form multiple thin film transistors (TFTs) and wiring structures at different locations. The TFTs cooperate with each other to form multiple pixel driving units or driving circuits, and the wiring structures provide signals or voltages to the circuits.

[0132] The isolation structure 140 is located on one side of the substrate. For example, the isolation structure 140 can be located on a side of the array functional layer 112 away from the substrate. The isolation structure 140 encloses and forms a plurality of isolation openings 900.

[0133] Optionally, the display panel provided in this embodiment may further include a pixel defining layer 130, which is located between the isolation structure 140 and the substrate. For example, the pixel defining layer 130 is located between the isolation structure 140 and the array function layer 112. The pixel defining layer 130 includes a pixel opening, and the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening 900 on the substrate. That is, the pixel opening and the isolation opening 900 are connected.

[0134] At least part of the light-emitting device 810 is located in the corresponding isolation opening 900; the light-emitting device 810 includes a first electrode 120, a light-emitting functional layer 150 and a second electrode 160 stacked in a direction away from the substrate 111, the isolation structure 140 is conductive, and the second electrode 160 is electrically connected to the isolation structure 140.

[0135] The first electrode 120 can be connected to the pixel driving circuit in the array functional layer 112, and the second electrode 160 can be connected to the common voltage providing circuit through the isolation structure 140. When there is a potential difference between the first electrode 120 and the second electrode 160, the light-emitting functional layer 150 located between the first electrode 120 and the second electrode 160 is driven to emit light.

[0136] In one possible implementation, see Figure 11 The isolation structure 140 includes a supporting portion 141 and a shielding portion 142 located on a side of the supporting portion 141 away from the substrate 111 , and an orthographic projection of the supporting portion 141 on the substrate 111 is located within an orthographic projection of the shielding portion 142 on the substrate 111 .

[0137] Optionally, the etching resistance of the support portion 141 is weaker than that of the shielding portion 142 .

[0138] Optionally, the material of the support portion 141 includes aluminum, and / or the material of the shielding portion 142 includes titanium.

[0139] For some possible implementations, see Figure 12 The isolation structure 140 further includes a receiving portion 143 located between the supporting portion 141 and the substrate 111 .

[0140] Optionally, the orthographic projection of the receiving portion 143 on the substrate 111 is located within the orthographic projection of the shielding portion 142 on the substrate 111 .

[0141] Optionally, the material of the receiving portion 143 includes molybdenum.

[0142] Alternatively, see Figure 13 , at least a portion of the second electrode 160 contacts the receiving portion 143 .

[0143] In a possible implementation, the light-emitting functional layer 150 includes a hole injection layer 151 and an electroluminescent layer 152 stacked in a direction away from the substrate 111 .

[0144] Alternatively, see Figure 13 The light-emitting functional layer 150 further includes a hole transport layer located between the hole injection layer 151 and the electroluminescent layer 152 , an electron transport layer and an electron injection layer located on the side of the electroluminescent layer 152 away from the substrate 111 and stacked.

[0145] In a possible implementation, the display panel further includes a plurality of packaging units 170 , and the packaging units 170 are located on a side of the corresponding light-emitting device 810 away from the substrate 111 .

[0146] Optionally, there is a gap between adjacent packaging units 170 , and the gap is located on a side of the isolation structure 140 away from the substrate 111 .

[0147] In one possible implementation, see Figure 14 The display panel further includes a first encapsulation layer 180 and a second encapsulation layer 190 located on a side of the encapsulation unit 170 and the isolation structure 140 away from the substrate.

[0148] Optionally, the materials of the encapsulation unit 170 and the second encapsulation layer 190 include inorganic materials; and the material of the first encapsulation layer 180 includes organic materials.

[0149] Optionally, the materials of encapsulation unit 170 and second encapsulation layer 190 include inorganic materials, and the material of first encapsulation layer 180 includes organic materials. For example, encapsulation unit 170 and second encapsulation layer 190 can be formed by chemical vapor deposition (CVD), and first encapsulation layer 180 can be formed by inkjet printing (IJP).

[0150] The present application also provides an electronic device that may include the display panel provided herein or a display panel tested using the display panel testing method provided herein. The electronic device may include a mobile phone, tablet computer, smart wearable device, television, laptop computer, monitor, or other device with a display function.

[0151] In summary, the present application provides a display panel detection method and a display panel. By selecting an area with no dark spots or fewer dark spots in the display screen of the display panel as the target area, and calculating the luminous efficiency value of the target area at each target grayscale, the difference between the luminous efficiency values ​​is used to determine whether there is leakage in the display panel. The influence of dark spots on the detection results can be eliminated, thereby improving the accuracy of the detection.

[0152] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0153] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A display panel detection method, characterized in that: The method comprises: Selecting at least one target area in a display image of the display panel where the number of dark spots is smaller than a preset threshold; For the target area, determining energy consumption parameters corresponding to the target area at a plurality of different target grayscales; Determining the luminous efficiency values ​​corresponding to the target area at each target grayscale according to the energy consumption parameter; determining whether the display panel has leakage according to the difference between the luminous efficiency values; The step of selecting at least one target area in the display image of the display panel where the number of dark spots is smaller than a preset threshold comprises: Selecting at least one target area without dark spots in a display image of a display panel; Alternatively, at the maximum grayscale, at least one region of a preset shape in which the number of dark spots is smaller than a preset threshold value is selected from the display image of the display panel as the target region.

2. The display panel detection method according to claim 1, wherein: The step of selecting at least one target area in the display image of the display panel where the number of dark spots is less than a preset threshold comprises: At the first grayscale, determining an area in the display image where the number of dark spots is less than a preset threshold as a test area; At a second grayscale, determining at least two areas with different actual brightness values ​​from the test area as target areas; the second grayscale is smaller than the first grayscale; The method further comprises: Determining luminous efficiency curves corresponding to each target area according to the luminous efficiency values ​​corresponding to each target area at each target grayscale; Determining the influence of different degrees of leakage on the luminous efficiency according to the luminous efficiency curves corresponding to each of the target areas; Wherein, the first grayscale is the maximum grayscale.

3. The display panel detection method according to claim 2, wherein: The step of determining, for the target area, energy consumption parameters corresponding to the target area at a plurality of different target grayscales includes: For at least two target areas, determining energy consumption parameters corresponding to the at least two target areas at a first target grayscale; The first target grayscale is controlled to decrease to a second target grayscale, and energy consumption parameters corresponding to at least two target areas at the second target grayscale are determined.

4. The display panel detection method according to claim 1, wherein: The energy consumption parameters include an actual brightness value of the target area at the target grayscale and a driving current value of the display panel at the target grayscale; The step of determining, for the target area, energy consumption parameters corresponding to the target area at a plurality of different target grayscales includes: For each target area, actual brightness values ​​corresponding to the target area at different target grayscales and driving current values ​​corresponding to the display panel are determined.

5. The display panel detection method according to claim 4, wherein: The step of determining, for each target area, the actual brightness value corresponding to the target area at different target grayscales and the driving current value corresponding to the display panel, includes: For each target area, while controlling the target area to display a white screen and other areas except the target area to display a black screen, the actual brightness value corresponding to each target area and the driving current value corresponding to the display panel at each target grayscale are obtained.

6. The display panel detection method according to claim 4, wherein: The step of determining the luminous efficiency values ​​corresponding to the target area at each target grayscale according to the energy consumption parameter includes: The luminous efficiency values ​​corresponding to each target area at a plurality of different target grayscales are calculated according to the actual brightness values ​​corresponding to each target area at each target grayscale and the driving current values ​​corresponding to each display panel.

7. The display panel detection method according to claim 6, wherein: The luminous efficiency value is calculated as follows: Among them, represents the luminous efficiency value; represents the actual brightness value corresponding to the target area; represents the total area of ​​the display area of ​​the display panel; represents the driving current value corresponding to the display panel; represents the transmittance of the polarizer and cover plate in the display panel.

8. The display panel detection method according to claim 1, wherein: The step of determining whether the display panel has leakage according to the difference in the luminous efficiency values ​​includes: Determine a first luminous efficiency value corresponding to the larger target grayscale and a second luminous efficiency value corresponding to the smaller target grayscale of any two target grayscales; determining whether there is leakage in the display panel according to a ratio of the second luminous efficiency value to the first luminous efficiency value; If , then there is no leakage in the display panel; Here, represents the second luminous efficiency value, and represents the first luminous efficiency value.

9. A display panel, characterized in that: The display panel is tested by any one of the display panel detection methods 1-8.

10. The display panel according to claim 9, wherein: The display panel comprises: substrate; an isolation structure located on one side of the substrate, wherein the isolation structure encloses and forms a plurality of isolation openings; A plurality of light-emitting devices, at least part of which is located in the corresponding isolation opening; the light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked in a direction away from the substrate, the isolation structure is conductive, and the second electrode is electrically connected to the isolation structure.

11. The display panel according to claim 10, wherein: The isolation structure includes a supporting portion and a shielding portion located on a side of the supporting portion away from the substrate, and an orthographic projection of the supporting portion on the substrate is located within an orthographic projection of the shielding portion on the substrate.

12. The display panel according to claim 10, wherein: The light-emitting functional layer includes a hole injection layer and an electroluminescent layer stacked in a direction away from the substrate.

13. The display panel according to claim 10, wherein: The display panel further includes a plurality of packaging units, each of which is located on a side of the corresponding light-emitting device away from the substrate.

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