Display panel detection method and display panel

Abstract

The invention provides a display panel detection method and a display panel. The method comprises the steps that at least one target area with the dark spot number smaller than a preset threshold value is selected from a display picture of the display panel; aiming at the target area, determining energy consumption parameters respectively corresponding to the target area under a plurality of different target gray scales; according to the energy consumption parameter, determining a light-emitting efficiency value corresponding to each target gray scale of the target area; and determining whether the display panel has electric leakage or not according to the difference between the light-emitting efficiency values. According to the embodiment of the invention, the area without dark spots or with few dark spots in the display panel is selected as the target area, the luminous efficiency values of the target area under each target gray scale are calculated, and whether the display panel leaks electricity or not is determined according to the difference between the luminous efficiency values, so that the influence of the dark spots on the detection result can be eliminated, and the detection accuracy is improved.

Description

Technical Field

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

[0002] Flat panel display devices based on technologies such as Organic Light Emitting Diode (OLED) and Light Emitting Diode (LED) are widely used in various consumer electronic products such as mobile phones, televisions, laptop computers, and desktop computers due to their advantages of high picture quality, power saving, thin body, and wide application range, and have become the mainstream in display devices. In the traditional display panel manufacturing process, the light-emitting pixel patterning is usually achieved through a Fine Metal Mask (FMM). The FMM technology is mature and has rich mass production experience. However, the FMM technology also has problems such as limited precision, high development cost, and long development cycle. The fine metal maskless technology eliminates the limitations of the traditional OLED process on the display screen size, resolution, and other screen body performances, and has the advantages of high performance, full-domain size, and agile delivery. Patents CN118251982A, CN116648095A, CN117062489A, CN118742138A, CN118678783A, CN118660598A, CN118675450A, CN118824188A, CN118781966A record the relevant content of the fine metal maskless 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 deficiencies in the prior art, the purpose of this application is to provide a display panel detection method, and the method includes: Select at least one target area in the display screen of the display panel where the number of dark dots is less than a preset threshold; For the target area, determine the energy consumption parameters corresponding to the target area at multiple different target gray levels respectively; Determine the luminous efficiency values corresponding to the target area at each of the target gray levels according to the energy consumption parameters; Determine whether there is leakage in the display panel according to the differences between the luminous efficiency values.

[0005] In a possible implementation manner, the step of selecting at least one target area in the display screen of the display panel where the number of dark dots is less than a preset threshold includes: Select at least one target area without dark dots in the display screen of the display panel.

[0006] In a possible implementation, the step of selecting at least one target area with the number of dark dots less than a preset threshold in the display picture of the display panel includes: At the maximum gray level, select at least one area with a preset shape and the number of dark dots less than a preset threshold in the display picture of the display panel as the target area.

[0007] In a possible implementation, the step of selecting at least one target area with the number of dark dots less than a preset threshold in the display picture of the display panel includes: At the first gray level, determine the area in the display picture where the number of dark dots is less than the preset threshold as the test area; At the second gray level, determine at least two areas with different actual brightness values from the test area as the target areas; the second gray level is less than the first gray level; The method further includes: Determine the luminous efficiency curves respectively corresponding to the target areas according to the luminous efficiency values respectively corresponding to the target areas at each target gray level; Determine the influence of different degrees of leakage on the luminous efficiency according to the luminous efficiency curves respectively corresponding to the target areas; Wherein, the first gray level is the maximum gray level.

[0008] In a possible implementation, the step of determining the energy consumption parameters respectively corresponding to the target area at multiple different target gray levels for the target area includes: For at least two of the target areas, determine the energy consumption parameters respectively corresponding to the at least two target areas at the first target gray level; Control the first target gray level to drop to the second target gray level, and determine the energy consumption parameters respectively corresponding to the at least two target areas at the second target gray level.

[0009] In a possible implementation, the energy consumption parameters include the actual brightness value of the target area at the target gray level and the driving current value of the display panel at the target gray level; The step of determining the energy consumption parameters respectively corresponding to the target area at multiple different target gray levels for the target area includes: For each target area, determine the actual brightness value respectively corresponding to the target area at different target gray levels and the driving current value respectively corresponding to the display panel.

[0010] In a possible implementation, the step of determining, for each of the target regions, the actual brightness values respectively corresponding to the target regions at different target gray levels and the driving current values respectively corresponding to the display panel includes: For each of the target regions, when controlling the target regions to display white screens and other regions except the target regions to display black screens, obtain the actual brightness values respectively corresponding to the target regions at each of the target gray levels and the driving current values respectively corresponding to the display panel.

[0011] In a possible implementation, the step of determining, according to the energy consumption parameter, the luminous efficiency values respectively corresponding to the target regions at each of the target gray levels includes: Calculate the luminous efficiency values respectively corresponding to the target regions at a plurality of different target gray levels according to the actual brightness values respectively corresponding to the target regions at each of the target gray levels and the driving current values respectively corresponding to the display panel.

[0012] In a possible implementation, the luminous efficiency value is calculated by the following method:

[0013] wherein, represents the luminous efficiency value; represents the actual brightness value corresponding to the target region; represents the total area of the display region of the display panel; represents the driving current value corresponding to the display panel; represents the transmittance of the polarizer and the cover plate in the display panel.

[0014] In a possible implementation, the step of determining whether there is a leakage in the display panel according to the differences between the luminous efficiency values includes: Determine a first luminous efficiency value corresponding to the larger target gray level and a second luminous efficiency value corresponding to the smaller target gray level among any two of the target gray levels; Determine whether there is a leakage in the display panel according to the ratio of the second luminous efficiency value to the first luminous efficiency value; If , then there is no leakage in the display panel; wherein, represents the second luminous efficiency value, represents the first luminous efficiency value.

[0015] Another object of the present application is to provide a display panel, and the display panel performs tests by the display panel detection method provided by the present application.

[0016] In a possible implementation, the display panel includes: a substrate; an isolation structure located on one side of the substrate, the isolation structure surrounding and forming a plurality of isolation openings; a plurality of light-emitting devices, at least part of the light-emitting devices being located in the corresponding isolation openings; the light-emitting devices include a first electrode, a light-emitting functional layer, and a second electrode that are stacked in a direction away from the substrate, the isolation structure has conductivity, and the second electrode is electrically connected to the isolation structure.

[0017] In a possible implementation, the isolation structure includes a support portion and a shielding portion located on the side of the support portion away from the substrate, and the orthographic projection of the support portion on the substrate is located within the orthographic projection of the shielding portion on the substrate.

[0018] In a possible implementation, the light-emitting functional layer includes a hole injection layer and an electroluminescent layer that are stacked in a direction away from the substrate.

[0019] In a possible implementation, the display panel further includes a plurality of encapsulation units, and the encapsulation units are located on the side of the corresponding light-emitting devices away from the substrate.

[0020] Compared with the prior art, the present application has the following beneficial effects: 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 light-emitting efficiency values of the target area at each target gray level, it is determined whether there is leakage in the display panel through the difference between the light-emitting efficiency values, which can exclude the influence of dark spots on the detection result, thereby improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0022] Figure 1 is a schematic structural diagram of a display panel of the prior art; Figure 2 is a schematic structural diagram of a target area in the prior art; Figure 3 is one of the step flow diagrams of the display panel detection method provided by the embodiments of the present application; Figure 4aOne of the schematic diagrams of the luminous efficiency curve provided by the embodiment of the present application; Figure 4b Another schematic diagram of the luminous efficiency curve provided by the embodiment of the present application; Figure 5 Schematic diagram of the sub-steps of step S110 provided by the embodiment of the present application; Figure 6 Schematic diagram of the structure of the target area provided by the embodiment of the present application; Figure 7 Another schematic diagram of the step flow of the display panel detection method provided by the embodiment of the present application; Figure 8 Schematic diagram of the sub-steps of step S120 provided by the embodiment of the present application; Figure 9 Schematic diagram of the sub-steps of step S140 provided by the embodiment of the present application; Figure 10 Cross-sectional schematic of the display panel provided by the embodiment of the present application Figure 1 ; Figure 11 One of the schematic diagrams of the isolation structure provided by the embodiment of the present application; Figure 12 Another schematic diagram of the isolation structure provided by the embodiment of the present application; Figure 13 Cross-sectional schematic of the display panel provided by the embodiment of the present application Figure 2 ; Figure 14 Cross-sectional schematic of the display panel provided by the embodiment of the present application Figure 3 。

[0023] Icons: 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 - Encapsulation unit; 180 - First encapsulation layer; 190 - Second encapsulation layer; 141 - Support part; 142 - Shielding part; 143 - Receiving part; 200 - Target area. Detailed implementation manners

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0025] Accordingly, 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 claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0026] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0027] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0028] It should be noted that, without conflict, different features in the embodiments of the present application can be combined with each other.

[0029] Please refer to Figure 1 , in some related display panels, an isolation structure 140' with isolation openings 900' is provided. When forming the light-emitting device 810' and the second electrode 160' by forming an evaporation light-emitting material layer and a conductive material layer to form the light-emitting device 810', the light-emitting material layer and the conductive material layer between different isolation openings 900' can be disconnected. Thus, the light-emitting functional layer 150' and the second electrode 160' of the light-emitting device 810' can be formed by etching after whole-layer evaporation. Among them, 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 overlap with the isolation structure 140', so that the isolation structure 140' provides a light-emitting common voltage (ELVSS) for the second electrode 160'. 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.

[0030] It has been found through research that in such display panels, there are many dark spots. Dark spots generally refer to pixels or areas in the display panel that cannot emit light normally. Please refer to Figure 2, Currently, when detecting the leakage of a display panel, the central 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 central area of the display panel, and these dark spots will interfere with the leakage detection at low brightness and low gray levels, making the leakage measurement inaccurate.

[0031] In view of this, this embodiment provides a solution that can solve the above problems, and the solution provided in this embodiment will be elaborated in detail below.

[0032] Please refer to Figure 3 , Figure 3 which is a schematic flowchart of the steps of a display panel detection method provided in this embodiment, and this method may include the following steps.

[0033] Step S110, select at least one target area 200 with the number of dark spots less than a preset threshold in the display screen of the display panel.

[0034] In this embodiment, dark spot detection can be performed on the display screen of the display panel, and an area with the number of dark spots less than the preset threshold, that is, an area without dark spots or with fewer dark spots, in the display panel is selected as the target area 200. Specifically, one or more target areas 200 can be selected.

[0035] Exemplarily, the preset threshold can be 10. When selecting the target area 200, an area with the number of dark spots less than or equal to 10 can be selected as the target area.

[0036] Step S120, for the target area 200, determine the energy consumption parameters respectively corresponding to the target area 200 at multiple different target gray levels.

[0037] In this embodiment, the energy consumption parameters respectively corresponding to the target area 200 at multiple different target gray levels can be obtained, and this energy consumption parameter can directly characterize the energy consumption size of the display panel when emitting light. The energy consumption of the display panel is different when emitting light at different gray levels. When emitting light at a larger gray level, the brightness is relatively large, and the energy consumption of the display panel is higher; when emitting light at a smaller gray level, the brightness is relatively small, and the energy consumption of the display panel is lower.

[0038] Exemplarily, the target gray levels can include 255 gray level, 126 gray level, 96 gray level, 80 gray level, 48 gray level, 32 gray level, 24 gray level, 16 gray level, 12 gray level, 8 gray level, and 5 gray level, etc.

[0039] Step S130, determine the luminous efficiency values respectively corresponding to the target area 200 at each of the target gray levels according to the energy consumption parameters.

[0040] In this embodiment, the luminous efficiency values corresponding to the target area 200 at each target gray level can be calculated according to the energy consumption parameters obtained in step S120. For example, when the target gray level is 255 gray levels, the energy consumption parameters of the target area 200 at 255 gray levels can be obtained first, and then the luminous efficiency value of the target area 200 at 255 gray levels can be calculated through the energy consumption parameters of the target area 200 at 255 gray levels.

[0041] Step S140, determine whether there is leakage in the display panel according to the differences between the luminous efficiency values.

[0042] Please refer to Figure 4a and Figure 4b , through the research of the inventor, it is found that when there is no pixel leakage defect (leakage) in the display panel, the luminous efficiency of the display panel at different target gray levels is basically the same (as shown in Figure 4a ). However, when there is a pixel leakage defect (leakage) in the display panel, the display efficiency of the display panel at low brightness and low gray levels will decrease significantly (as shown in Figure 4b ).

[0043] Therefore, in step S140, according to the luminous efficiency values of the display panel at each target gray level, it can be determined whether there is an obvious downward trend in the luminous efficiency value of the display panel as the target gray level decreases, so as to determine whether there is an obvious leakage problem in the display panel.

[0044] Based on the above design, in the display panel detection method provided in this embodiment, by selecting an area with no or few dark dots in the display screen of the display panel as the target area 200, calculating the luminous efficiency values of the target area 200 at each target gray level, and determining whether there is leakage in the display panel according to the differences between the luminous efficiency values, the influence of dark dots on the detection result can be excluded, thereby improving the detection accuracy.

[0045] In a possible implementation manner, in step S110, when selecting at least one target area 200 with no or few dark dots in the display screen, at the maximum gray level, at least one area with a preset shape and the number of dark dots less than a preset threshold can be determined in the display panel as the target area 200.

[0046] In this embodiment, the greater the value of the gray scale, the greater the corresponding brightness of the display panel. For example, the brightness corresponding to 255 gray scale can be 500 nit. At the maximum gray scale, the voltage used to drive the pixel to emit light is the largest. If there are still pixels that cannot emit light normally at the maximum gray scale, it is considered that the pixel cannot be lit. Therefore, in order to exclude the interference of dark dots on detecting leakage current, an area without dark dots or with fewer dark dots can be selected from the display screen of the display panel as the target area 200 at the maximum gray scale. 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 sizes of the multiple target areas 200 are the same. 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.

[0047] In a possible implementation manner, please refer to Figure 5 , step S110 may include the following sub-steps.

[0048] Step S111, at the first gray scale, determine an area where the number of dark dots in the display screen is less than a preset threshold as the test area.

[0049] Step S112, at the second gray scale, determine at least two areas with different actual brightness values from the test area as the target area 200; the second gray scale is less than the first gray scale.

[0050] In this embodiment, dark dot detection can be performed on the display screen at the first gray scale, and multiple areas without dark dots or with fewer dark dots in the display screen can be selected as the test areas. Then, at the second gray scale, at least two areas with different actual brightness values are selected from the multiple test areas as the target area 200. Among them, the second gray scale can be less than the first gray scale, and the first gray scale can be the maximum gray scale. The brightness corresponding to the first gray scale is larger, and the brightness corresponding to the second gray scale is smaller. For example, the first gray scale can be 255 gray scale, the brightness corresponding to the first gray scale can be 500 nit, the second gray scale can be 32 gray scale, and the brightness corresponding to the second gray scale can be 2 nit.

[0051] Specifically, the sizes of at least two target areas 200 are the same, and the size of the target area 200 can be less than or equal to the size of the test area. During 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 area with different actual brightness values can be directly used as the target area 200.

[0052] In some examples, please refer to Figure 6, three circular regions L1, L2, and L3 with the same size can be selected from multiple test regions as target regions 200. Among them, the brightness of target region L1 can be less than the brightness of target regions L2 and L3, and the brightness of target region L2 can be less than the brightness of target region L3.

[0053] In the above design, by selecting test regions at the first gray level, the influence of dark spots on the detection results can be excluded as much as possible. At the same time, by selecting at least two target regions 200 with different actual brightness values at the second gray level, the overall leakage characteristics of the display panel can be detected more accurately, the severity of leakage corresponding to different target regions 200 can be determined, and the display panel can be further processed.

[0054] Please refer to Figure 7 , the display panel detection method may further include the following steps.

[0055] Step S210, determine the luminous efficiency curves corresponding to the respective target regions 200 according to the luminous efficiency values corresponding to the respective target regions 200 at the respective target gray levels.

[0056] In this embodiment, for each target region 200, a luminous efficiency curve can be constructed according to the luminous efficiency values corresponding to the target region 200 at the respective target gray levels. Among them, the abscissa of the luminous efficiency curve can be the target gray level, and the ordinate of the luminous efficiency curve can be the luminous efficiency value.

[0057] Step S220, determine the influence of different degrees of leakage problems on the luminous efficiency according to the luminous efficiency curves corresponding to the respective target regions 200.

[0058] In this embodiment, the influence of different degrees of leakage problems on the luminous efficiency can be determined according to the slopes of the luminous efficiency curves corresponding to the respective target regions 200 constructed in step S210. Thus, according to the influence of different degrees of leakage problems on the luminous efficiency, the compensation parameters or compensation methods for brightness compensation of the display panel can be determined more effectively or more pertinently. In addition, it is also convenient to perform slicing processing on the display panel in subsequent processes. Among them, the slope change of the target region 200 with a larger leakage degree is larger, and the luminous efficiency value drops faster at low gray levels. The slope change of the target region 200 with a smaller leakage degree is smaller, and the luminous efficiency value drops slower at low gray levels.

[0059] In a possible implementation manner, please refer to Figure 8 , step S120 may further include the following sub-steps.

[0060] Step S121, for at least two of the target regions, determine the energy consumption parameters corresponding to the at least two target regions at the first target gray level.

[0061] In this embodiment, for at least two target regions selected in step S112, energy consumption parameters respectively corresponding to the at least two target regions at a first target gray level can be obtained, where the first target gray level is the starting gray level, the starting gray levels corresponding to the at least two target regions are the same, and the brightness levels corresponding to the at least two target regions at the same starting gray level are the same. Exemplarily, the first target gray level can be the 255 gray level.

[0062] Step S122: Control the first target gray level to drop to a second target gray level, and determine the energy consumption parameters respectively corresponding to the at least two target regions at the second target gray level.

[0063] In this embodiment, for any one target region, after obtaining the energy consumption parameter corresponding to the target region at the first target gray level, the first target gray level can be controlled to drop to the second target gray level, so as to obtain the energy consumption parameter corresponding to the target region at the second target gray level. Exemplarily, the second target gray level can be the 128 gray level.

[0064] After obtaining the energy consumption parameter corresponding to the target region at the 128 gray level, the target gray level can continue to be controlled to drop, so as to respectively obtain the energy consumption parameters respectively corresponding to other target gray levels (for example, 96 gray level, 80 gray level, 48 gray level, 32 gray level, 24 gray level, 16 gray level, 12 gray level, 8 gray level, and 5 gray level, etc.).

[0065] In a possible implementation manner, the energy consumption parameter can include the actual brightness value of the target region 200 at the target gray level and the driving current value of the display panel at the target gray level.

[0066] In step S120, for each target region 200, the actual brightness value respectively corresponding to the target region 200 at different target gray levels and the driving current value respectively corresponding to the display panel can be determined.

[0067] In this embodiment, for each target region 200, the actual brightness value respectively corresponding to the target region 200 at each target gray level and the driving current value of the display panel respectively corresponding to each target gray level can be obtained as the energy consumption parameter corresponding to the target region 200. For example, for a target region 200, the actual brightness values respectively corresponding to the target region 200 at target gray levels such as 255 gray level, 126 gray level, 96 gray level, 80 gray level, 48 gray level, 32 gray level, 24 gray level, 16 gray level, 12 gray level, 8 gray level, and 5 gray level can be sequentially obtained, as well as the driving current values of the display panel corresponding to these gray levels.

[0068] Specifically, for each target gray level, the actual brightness value of the target area 200 can be detected by an optoelectronic probe, and the drive current value of the display panel can also be detected by a multimeter.

[0069] In a possible implementation, when determining the actual brightness value corresponding to each target area 200 at different target gray levels and the drive current value corresponding to the display panel respectively for each target area 200, the actual brightness value corresponding to each target area 200 and the drive current value corresponding to the display panel respectively at each target gray level can be obtained under the condition that the target area 200 is controlled to display a white screen and other areas except the target area 200 display a black screen.

[0070] In this embodiment, when detecting the energy consumption parameter of a target area 200, the actual brightness value corresponding to the target area 200 at each target gray level and the drive current value corresponding to the display panel at each target gray level can be obtained under the condition that the target area 200 is controlled to display a white screen and other areas except the target area 200 display a black screen. Under the condition that the target area 200 is controlled to display a white screen and other areas except the target area 200 display a black screen, the voltage values corresponding to each area of the display panel are the same.

[0071] Specifically, the target area 200 to be detected can be determined first, and then the 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 this display image, the target gray level is adjusted. For example, the target gray level can be adjusted to switch from the maximum gray level to the minimum gray level, so as to obtain the actual brightness value corresponding to the target area 200 at each target gray level and the drive current value corresponding to the display panel at each target gray level.

[0072] In a possible implementation, in step S130, when determining the luminous efficiency value corresponding to each target area 200 at each target gray level according to the energy consumption parameter, the luminous efficiency value corresponding to each target area 200 at multiple different target gray levels can be calculated according to the actual brightness value corresponding to each target area 200 at each target gray level and the drive current value corresponding to the display panel respectively.

[0073] Specifically, the luminous efficiency value can be calculated by the following method:

[0074] Among them, can represent the luminous efficiency value; can represent the actual brightness value corresponding to the target area 200; can represent the total area of the display area of the display panel; can represent the drive current value corresponding to the display panel; can represent the transmittance of the polarizer and the cover plate in the display panel, The value of can be 0.45.

[0075] For example, when the target gray level is 255 gray levels, the luminous efficiency value can be calculated by the following formula:

[0076] Among them, can represent the luminous efficiency value corresponding to 255 gray levels; can represent the actual brightness value corresponding to the target area 200 at 255 gray levels; can represent the total area of the display area of the display panel; can represent the drive current value corresponding to the display panel at 255 gray levels; can represent the transmittance of the polarizer and the cover plate in the display panel.

[0077] Among them, for the same display panel, the total area of the display area and the transmittance of the polarizer and the cover plate are usually the same.

[0078] In a possible implementation manner, please refer to Figure 9 , step S140 may include the following sub-steps.

[0079] Step S141, determining a first luminous efficiency value corresponding to the larger target gray level and a second luminous efficiency value corresponding to the smaller target gray level among any two of the target gray levels.

[0080] Step S142, determining whether there is a leakage in the display panel according to the ratio of the second luminous efficiency value to the first luminous efficiency value.

[0081] In this embodiment, for each display area, it can be determined whether there is a leakage in the display panel according to the ratio between the first luminous efficiency value and the second luminous efficiency value respectively corresponding to any two target gray levels.

[0082] Optionally, it can be determined whether there is a leakage in the display panel according to the ratio between the first luminous efficiency value and the second luminous efficiency value respectively corresponding to two adjacent target gray levels.

[0083] In some examples, if , it indicates that there is no leakage in the display panel. Among them, can represent the second luminous efficiency value, It can represent the first luminous efficiency value. For example, if the ratio of the second luminous efficiency value corresponding to the smaller target gray level to the first luminous efficiency value corresponding to the larger target gray level among any two target gray levels is 0.95, it indicates that there is no leakage in the display panel.

[0084] In some other examples, if the ratios between the first luminous efficiency values and the second luminous efficiency values respectively corresponding to any two target gray levels are all close to 1. For example, if the ratio between the first luminous efficiency value and the second luminous efficiency value is 0.93, it indicates that the luminous efficiency values of the target region 200 at different target gray levels are basically the same, and there is no leakage in the target region 200. If there is a significant deviation of the ratio between the first luminous efficiency value and the second luminous efficiency value from 1. For example, if the ratio between the first luminous efficiency value and the second luminous efficiency value is 0.5, it indicates that the luminous efficiency values of the target region 200 at different target gray levels vary greatly, and there is leakage in the target region 200.

[0085] The embodiment of the present application further provides a display panel, and this display panel can be tested by the display panel detection method provided in this embodiment.

[0086] In a possible implementation manner, please refer to 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.

[0087] 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).

[0088] Optionally, an array functional layer 112 may be further disposed on one side of the substrate. The array functional layer 112 may include a plurality of film layer structures, such as a buffer layer, an active layer, a plurality of conductive layers, a plurality of insulating layers, and a planarization layer, etc. The plurality of film layer structures of the array functional layer 112 may form a plurality of thin film transistors (TFTs) and wiring structures at different positions. The thin film transistors cooperate with each other to form a plurality of pixel driving units or driving circuits, and the wiring structure provides signals or voltages for the circuits.

[0089] The isolation structure 140 is located on one side of the substrate. For example, the isolation structure 140 may be located on the side of the array functional layer 112 away from the substrate. The isolation structure 140 encloses to form a plurality of isolation openings 900; Optionally, the display panel provided in this embodiment may further include a pixel definition layer 130, which is located between the isolation structure 140 and the substrate. For example, the pixel definition layer 130 is located between the isolation structure 140 and the array functional layer 112. The pixel definition layer 130 includes pixel openings, and the orthographic projection of the pixel openings on the substrate is located within the orthographic projection of the isolation openings 900 on the substrate, that is, the pixel openings communicate with the isolation openings 900.

[0090] At least a part of the light-emitting device 810 is located within 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 that are stacked in a direction away from the substrate 111. The isolation structure 140 has conductivity, and the second electrode 160 is electrically connected to the isolation structure 140.

[0091] 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.

[0092] In a possible implementation, please refer to Figure 11 , the isolation structure 140 includes a support portion 141 and a shielding portion 142 located on the side of the support portion 141 away from the substrate 111. The orthographic projection of the support portion 141 on the substrate 111 is located within the orthographic projection of the shielding portion 142 on the substrate 111.

[0093] Optionally, the etching resistance of the support portion 141 is weaker than that of the shielding portion 142.

[0094] Optionally, the material of the support portion 141 includes aluminum, and / or the material of the shielding portion 142 includes titanium.

[0095] In some possible implementations, please refer to Figure 12 , the isolation structure 140 further includes a receiving portion 143 located between the support portion 141 and the substrate 111.

[0096] 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.

[0097] Optionally, the material of the receiving portion 143 includes molybdenum.

[0098] Optionally, please refer to Figure 13 , at least a part of the second electrode 160 is in contact with the receiving portion 143.

[0099] In a possible implementation, the light-emitting functional layer 150 includes a hole injection layer 151 and an electroluminescent layer 152 which are stacked in a direction away from the substrate 111.

[0100] Optionally, referring to 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 which are stacked on the side of the electroluminescent layer 152 away from the substrate 111.

[0101] In a possible implementation, the display panel further includes a plurality of encapsulation units 170, and the encapsulation units 170 are located on the side of the corresponding light-emitting device 810 away from the substrate 111.

[0102] Optionally, there is a gap between adjacent encapsulation units 170, and the gap is located on the side of the isolation structure 140 away from the substrate 111.

[0103] In a possible implementation, referring to Figure 14 , the display panel further includes a first encapsulation layer 180 and a second encapsulation layer 190 which are located on the side of the encapsulation unit 170 and the isolation structure 140 away from the substrate.

[0104] Optionally, the materials of the encapsulation unit 170 and the second encapsulation layer 190 include inorganic materials; the material of the first encapsulation layer 180 includes organic materials.

[0105] 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. For example, the encapsulation unit 170 and the second encapsulation layer 190 can be formed by chemical vapor deposition (CVD), and the first encapsulation layer 180 can be formed by ink-jet printing (IJP).

[0106] The embodiment of the present application further provides an electronic device, and the electronic device may include the above display panel provided by the present application or a display panel tested by the above display panel detection method provided by the present application. The electronic device may include devices with a display function such as mobile phones, tablet computers, smart wearable devices, televisions, laptop computers, and monitors.

[0107] In summary, the present application provides a display panel detection method and a display panel. By selecting an area in the display screen of the display panel where there are no dark spots or fewer dark spots as the target area, and calculating the luminous efficiency values of the target area at each target gray level, it is determined whether there is leakage in the display panel through the difference between the luminous efficiency values, which can exclude the influence of dark spots on the detection result, thereby improving the detection accuracy.

[0108] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0109] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to 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 less than a preset threshold; For the target area, determining energy consumption parameters corresponding to the target area at a plurality of different target grayscales; Determine the luminous efficiency values ​​corresponding to the target area at each target grayscale according to the energy consumption parameter; Whether there is leakage in the display panel is determined according to the difference between the luminous efficiency values.

2. The display panel detection method according to claim 1, characterized in that: 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 least one target area without dark spots is selected in the display image of the display panel.

3. The display panel detection method according to claim 1, characterized in that: 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 maximum gray scale, at least one region of a preset shape in which the number of dark spots is less than a preset threshold is selected in the display image of the display panel as the target region.

4. The display panel detection method according to claim 1, characterized in that: 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: Under the first gray scale, 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: Determine the luminous efficiency curves corresponding to each of the target areas according to the luminous efficiency values ​​corresponding to each of the target areas at each of the target grayscales; Determine 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 gray scale is the maximum gray scale.

5. The display panel detection method according to claim 4, characterized in that: The step of determining, for the target area, energy consumption parameters corresponding to the target area at a plurality of different target grayscales, comprises: For at least two of the 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 of the target areas at the second target grayscale are determined.

6. The display panel detection method according to claim 1, characterized in that: 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; The step of determining, for the target area, energy consumption parameters corresponding to the target area at a plurality of different target grayscales, comprises: For each of the target areas, actual brightness values ​​corresponding to the target areas at different target grayscales and driving current values ​​corresponding to the display panels are determined.

7. The display panel detection method according to claim 6, characterized in that: The step of determining, for each of the target areas, actual brightness values ​​corresponding to the target areas at different target grayscales and driving current values ​​corresponding to the display panels, comprises: For each target area, when the target area is controlled to display a white picture and other areas except the target area display a black picture, the actual brightness value corresponding to each target area and the driving current value corresponding to the display panel are obtained at each target grayscale.

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

9. The display panel detection method according to claim 8, characterized in that: The luminous efficiency value is calculated by the following method: 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.

10. The display panel detection method according to claim 1, characterized in that: The step of determining whether the display panel has leakage according to the difference of the luminous efficiency values ​​comprises: 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; like , then there is no leakage in the display panel; in, represents the second luminous efficiency value, represents the first luminous efficiency value.

11. A display panel, characterized in that: The display panel is tested by any one of the display panel detection methods 1-10.

12. The display panel according to claim 11, characterized in that: The display panel comprises: substrate; An isolation structure located on one side of the substrate, 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 comprises 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.

13. The display panel according to claim 12, characterized in that: The isolation structure includes a supporting portion and a shielding portion located at 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.

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

15. The display panel according to claim 12, characterized in that: The display panel further includes a plurality of packaging units, and the packaging units are located at a side of the corresponding light emitting device away from the substrate.

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