Display panel, repairing method thereof and display device

Abstract

The application discloses a display panel and a display device, and a repairing method of the display panel. The display panel comprises a substrate, a main conductive pad unit and a backup conductive pad unit located on one side of the substrate, and a plurality of first pixel areas and second pixel areas. The display panel further comprises a plurality of light emitting elements, which comprise first light emitting elements and second light emitting elements. In the first pixel areas, the main conductive pad unit is connected with the first light emitting elements. In the second pixel areas, the main conductive pad unit is connected with the first light emitting elements, and at least part of the backup conductive pad unit is connected with the second light emitting elements. In a display stage, only one of the first light emitting elements and the second light emitting elements emits light in the second pixel areas. In this way, the phenomenon of local brightness being too high caused by the first light emitting elements and the second light emitting elements emitting light at the same time is avoided, and the overall display brightness uniformity of the product is improved while repairing the first light emitting elements that do not emit light.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, more particularly, to a display panel and a repairing method thereof, and a display device. BACKGROUND

[0002] From the CRT (Cathode Ray Tube) era to the liquid crystal era, and now to the OLED (Organic Light-Emitting Diode) era, the display industry has undergone decades of development and has become increasingly advanced. The display industry has become closely related to our lives, from traditional mobile phones, tablets, televisions, and PCs, to current smart wearable devices and VR electronic devices, all of which cannot be separated from display technology.

[0003] In the existing light emitting element (such as Micro LED or Mini LED product), during the mass transfer process, after the binding of the Micro LED or Mini LED and the substrate is completed, if it is detected that part of the Micro LED or Mini LED does not emit light, it is often not repaired at the original binding position, but a backup binding position is set beside the normal binding position. If it is detected that there is a Micro LED or Mini LED that cannot emit light, a new Micro LED or Mini LED will be introduced at the backup binding position corresponding to the light emitting element that cannot emit light and the light emitting element that emits light normally in the surrounding area. In this way, when a new Micro LED or Mini LED is introduced at the backup binding position corresponding to part of the light emitting element that emits light normally, both the original light emitting element that emits light normally and the new light emitting element will emit light, and the luminance of this part of the area is larger, which will cause uneven brightness on the display panel, affecting the normal display effect. SUMMARY

[0004] Therefore, the present application provides a display panel and a repairing method thereof, and a display device. After introducing the second type of light emitting element on the backup conductive pad unit, only one of the first type of light emitting element and the second type of light emitting element emits light, avoiding the phenomenon of excessive local brightness caused by the simultaneous emission of both types of light emitting elements. Repairing the first type of light emitting element that does not emit light also helps to improve the overall display brightness uniformity of the product.

[0005] In a first aspect, the present application provides a display panel, comprising a substrate and a main conductive pad unit and a backup conductive pad unit located on one side of the substrate, the display panel comprising a plurality of first pixel regions and second pixel regions.

[0006] The display panel further comprises a plurality of light emitting elements, the light emitting elements comprising first type light emitting elements and second type light emitting elements, in the first pixel region, the main conductive pad unit is connected to the first type light emitting elements; in the second pixel region, the main conductive pad unit is connected to the first type light emitting elements and at least part of the standby conductive pad unit is connected to the second type light emitting elements;

[0007] In the display stage, only one of the first type light emitting elements and the second type light emitting elements emits light in the second pixel region.

[0008] In a second aspect, the present application provides a repairing method of a display panel, comprising:

[0009] Providing a display panel, the display panel comprising main conductive pad units and standby conductive pad units, wherein the first type light emitting elements are bound to the main conductive pad units;

[0010] Providing driving signals to the first type light emitting elements, and determining whether there are first type light emitting elements that do not emit light:

[0011] If there are first type light emitting elements that do not emit light, binding the second type light emitting elements to the standby conductive pad units in the sub-pixel region where the first type light emitting elements that do not emit light are located and at least part of the sub-pixel regions adjacent to the sub-pixel region, wherein the sub-pixel region where the second type light emitting elements are bound is the second pixel region, and the sub-pixel region where the second type light emitting elements are not bound is the first pixel region;

[0012] When the first type light emitting elements in the second pixel region emit light normally, controlling only one of the first type light emitting elements and the second type light emitting elements in the second pixel region to emit light.

[0013] In a third aspect, the present application further provides a display device comprising the display panel provided in the first aspect of the present application.

[0014] Compared with the prior art, the display panel and the repairing method thereof and the display device provided by the present application at least achieve the following beneficial effects:

[0015] The display panel and the display device provided by the present application, the light emitting element comprises a first type light emitting element and a second type light emitting element, only the first type light emitting element connected with the main conductive pad unit is arranged in the first pixel area, the first type light emitting element connected with the main conductive pad unit and the second type light emitting element connected with at least part of the spare conductive pad unit are arranged in the second pixel area, when one or some of the first type light emitting elements in the second pixel area cannot emit light due to damage or other reasons, the second type light emitting element corresponding to the non-light emitting first type light emitting element can be controlled to emit light, so that the repair of the damaged light emitting element on the display panel is realized. In particular, in the display stage, only one of the first type light emitting element and the corresponding second type light emitting element emits light in the second pixel area, so as to avoid the phenomenon that the first type light emitting element and the corresponding second type light emitting element emit light at the same time, which causes the local over-brightness of the display panel, thereby realizing the repair of the damaged first type light emitting element and improving the overall display brightness uniformity of the display panel.

[0016] The repair method of the display panel provided by the present application, after the driving signal is provided to the first type light emitting element, when it is detected that there is a non-light emitting first type light emitting element on the display panel, the second type light emitting element is introduced in the sub-pixel area of the first type light emitting element and at least part of the sub-pixel area adjacent to the sub-pixel area, so as to realize the repair of the sub-pixel area where the damaged first type light emitting element is located. In particular, when the first type light emitting element and the second type light emitting element in a certain sub-pixel area can normally emit light, the present application only controls one of the first type light emitting element and the second type light emitting element to emit light, so as to avoid the phenomenon that the local brightness appears on the display panel, and improve the overall display brightness uniformity of the product.

[0017] Of course, any product implementing the present application does not necessarily need to achieve all the technical effects described above at the same time.

[0018] Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings incorporated in and forming a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application.

[0020] Figure 1 A schematic view of the display panel of the related art in which part of the light emitting elements is damaged is shown;

[0021] Figure 2 A schematic view of introducing the repair light emitting element to the damaged light emitting element and its periphery is shown;

[0022] Figure 3 Fig. 1 shows a top view of a display panel according to an embodiment of the present application;

[0023] Figure 4 Fig. 2 shows a schematic diagram of an arrangement of primary and backup conductive pad units on the display panel;

[0024] Figure 5 Fig. 3 shows a schematic diagram of an arrangement of light emitting elements in a first pixel region of the display panel; Figure 3 Fig. 4 shows a schematic diagram of an arrangement of light emitting elements in a second pixel region of the display panel;

[0025] Figure 6 Fig. 5 shows a schematic diagram of an arrangement of light emitting elements in a second pixel region of the display panel; Figure 3 Fig. 6 shows a schematic diagram of an arrangement of light emitting elements in a second pixel region of the display panel;

[0026] Figure 7 Fig. 7 shows a schematic diagram of a connection of first and second types of light emitting elements in a second pixel region of the display panel;

[0027] Figure 8 Fig. 8 shows a schematic diagram of a connection of first and second types of light emitting elements in a second pixel region of the display panel;

[0028] Figure 9 Fig. 9 shows a schematic diagram of a film layer structure within a single sub-pixel in a first pixel region of the display panel;

[0029] Figure 10 Fig. 10 shows a schematic diagram of an arrangement of first and second types of light emitting elements in a second pixel region of the display panel;

[0030] Figure 11 Fig. 11 shows a schematic diagram of an arrangement of first and second types of light emitting elements in a second pixel region of the display panel;

[0031] Figure 12 Fig. 12 shows a flow chart of a repair method for the display panel according to an embodiment of the present application;

[0032] Figure 13 Fig. 13 shows a schematic diagram of a structure for binding a first type of light emitting element on a primary conductive pad unit of the display panel;

[0033] Figure 14 Fig. 14 shows a schematic diagram of a first type of light emitting element that has been damaged on the display panel;

[0034] Figure 15 Fig. 15 shows a schematic diagram of a second type of light emitting element being bound around a periphery of the damaged first type of light emitting element;

[0035] Figure 16 Fig. 16 shows a schematic diagram of only one of a first and second types of light emitting elements emitting light in a same sub-pixel;

[0036] Figure 17 Fig. 1 shows a top view of a display device according to an embodiment of the present application. DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. If it is so designated in the embodiments set forth in the specification and drawings, the relative arrangement, numerical expressions, and numerical values of the components and steps set forth in the embodiments are not limiting of the scope of the present application.

[0038] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting of the scope of the application or its applications or uses.

[0039] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the specification, where appropriate.

[0040] In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0041] It should be noted that like reference numerals and letters in the various figures indicate similar items, and thus, once any term is defined in the context of a particular figure, further discussion of that term need not be repeated in subsequent figures.

[0042] Figure 1 Fig. 2 shows a schematic view of a display panel according to the related art, in which some light emitting elements are damaged, Figure 2 Fig. 3 shows a schematic view of introducing a repair light emitting element for the damaged light emitting element and its periphery, when some light emitting elements D1' in the display panel 100' are damaged, a repair light emitting element D2' is simultaneously bound for the damaged light emitting element D1' and the light emitting elements D1' in the periphery of the damaged light emitting element D1', that is, the repair light emitting element D2' is also arranged beside the light emitting elements D1' which are not damaged, when the display panel is lighted, the light emitting elements D1' which are not damaged and the corresponding repair light emitting elements D2' will emit light simultaneously, resulting in the light emitting brightness of this part of the area being greater than that of other areas, and a phenomenon of uneven display brightness appears on the display panel, affecting the overall display effect of the display panel.

[0043] To solve the above technical problems, the display panel and the repairing method thereof and the display device are provided, after the second light emitting element is introduced on the standby conductive pad unit, only one of the first light emitting element and the second light emitting element emits light, and the phenomenon of local brightness being too high caused by the two light emitting elements emitting light at the same time is avoided, and meanwhile, the overall display brightness uniformity of the product is also improved.

[0044] The specific embodiments and drawings will be described in detail below.

[0045] Figure 3 Fig. 1 shows a top view of the display panel provided by the embodiment of the present application, Figure 4 Fig. 2 shows a schematic diagram of the arrangement of the main conductive pad unit and the standby conductive pad unit on the display panel,

[0046] Figure 5 Fig. 3 shows a schematic diagram of the arrangement of the light emitting elements in the first pixel area of the display panel, Figure 3 Fig. 3 shows a schematic diagram of the arrangement of the light emitting elements in the first pixel area of the display panel,

[0047] Figure 6 Fig. 4 shows a schematic diagram of the arrangement of the light emitting elements in the second pixel area of the display panel, please refer to Figure 3 Fig. 4 shows a schematic diagram of the arrangement of the light emitting elements in the second pixel area of the display panel, please refer to Figures 3 to 6 The display panel provided by the embodiment of the present application comprises a substrate 00 and a main conductive pad unit 11 and a standby conductive pad unit 12 located on one side of the substrate, and the display panel comprises 100 first pixel areas Q1 and second pixel areas Q2;

[0048] The display panel further comprises a plurality of light emitting elements, and the light emitting elements comprise first light emitting elements D1 and second light emitting elements D2, in the first pixel area Q1, the main conductive pad unit 11 is connected with the first light emitting element D1; in the second pixel area Q2, the main conductive pad unit 11 is connected with the first light emitting element D1 and at least part of the standby conductive pad unit 12 is connected with the second light emitting element D2;

[0049] In the display stage, only one of the first light emitting element D1 and the second light emitting element D2 emits light in the second pixel area Q2.

[0050] It should be noted that, Figure 3 The display panel shown in the figure schematically shows the sub-pixels P contained in the display panel, and does not represent the number of the sub-pixels P actually contained in the display panel. Alternatively, one main conductive pad unit 11 and one standby conductive pad unit 12 are arranged in each sub-pixel P, and the first pixel area Q1 and the second pixel area Q2 each comprise a plurality of sub-pixels P. Figure 4Only the main conductive pad unit 11 and the backup conductive pad unit 12 in part of the sub-pixel P are shown, and the main conductive pad unit 11 and the backup conductive pad unit 12 each include two sub-pads as an example, and in some other embodiments of the present application, one sub-pad in the main conductive pad unit 11 and the backup conductive pad unit 12 can be reused, which is not limited in the present application. Figure 4 Only the main conductive pad unit 11 and the backup conductive pad unit 12 are shown, and the actual size and shape are not represented. Figure 5 Only part of the sub-pixel P in the first pixel area Q1 is shown, and the actual number and size are not represented. Figure 6 Only part of the sub-pixel P in the second pixel area Q2 is shown, and the actual number and size are not represented.

[0051] Continuing to refer to Figures 3 to 6 The display panel provided by the embodiment of the present application includes a first pixel area Q1 and a second pixel area Q2, in the first pixel area Q1, only the first type of light emitting element D1 is bound on the main conductive pad unit 11 corresponding to each sub-pixel P; in the second pixel area Q2, the first type of light emitting element D1 is bound on the main conductive pad unit 11 corresponding to each sub-pixel P, and the second type of light emitting element D2 is bound on the backup conductive pad unit 12 corresponding to at least part of the sub-pixel P. When one or more of the first type of light emitting element D1 in the second pixel area Q2 cannot emit light due to damage or other reasons, the second type of light emitting element D2 corresponding to the non-emitting first type of light emitting element D1 can be controlled to emit light, thereby repairing the damaged light emitting element on the display panel. Since in the second pixel area Q2, part of the first type of light emitting element D1 bound to the main conductive pad unit 11 can emit light normally, that is, the phenomenon that the first type of light emitting element D1 and the second type of light emitting element D2 in part of the sub-pixel P can emit light at the same time may occur, therefore, in this case, in the display stage, the present application can control only one of the first type of light emitting element D1 and the second type of light emitting element D2 corresponding thereto in the same sub-pixel P to emit light, thereby avoiding the phenomenon that the first type of light emitting element D1 and the second type of light emitting element D2 corresponding thereto emit light at the same time, which causes the display panel to be locally too bright, so that while repairing the damaged first type of light emitting element D1, the overall display brightness uniformity of the display panel is also improved.

[0052] Figure 7 The second pixel area Q2 is shown as a connection diagram of the first type of light emitting element D1 and the second type of light emitting element D2, please refer to Figure 7In an optional embodiment of the present application, in the second pixel region Q2, the first type light emitting element D1 and the second type light emitting element D2 are connected in parallel and have the same light emitting color.

[0053] Optionally, in the display panel provided by the embodiment of the present application, when one or more of the first type light emitting elements D1 in the second pixel region Q2 is damaged and cannot emit light, the second type light emitting element D2 is introduced on the spare conductive pad unit 12 in the corresponding sub-pixel P region, and when the light emitting color of the introduced second type light emitting element D2 is the same as that of the corresponding first type light emitting element D1, the second type light emitting element D2 can replace the first type light emitting element D1 to emit light, thereby repairing the damaged first type light emitting element D1. When the first type light emitting element D1 and the second type light emitting element D2 are connected in parallel, a second type light emitting element D2 can be connected in parallel on the basis of the original circuit of the first type light emitting element D1, without the need to change the structure of the original driving circuit, so that the repair of the damaged first type light emitting element D1 is realized without increasing the structural complexity of the driving circuit in the display panel.

[0054] In an optional embodiment of the present application, continuing to refer to Figure 7 , in the second pixel region Q2, the rated voltage of the first type light emitting element D1 is U1, and the rated voltage of the second type light emitting element D2 is U2, wherein U1≠U2.

[0055] Specifically, in the second pixel region Q2, the rated voltages of the first type light emitting element D1 and the second type light emitting element D2 are set to be different, so that the breakdown voltages of the first type light emitting element D1 and the second type light emitting element D2 are different. When the first type light emitting element D1 and the second type light emitting element D2 in the same sub-pixel P can normally emit light, a breakdown voltage can be provided to the first type light emitting element D1 and the second type light emitting element D2 in the same sub-pixel P, so that the one with the smaller breakdown voltage among the first type light emitting element D1 and the second type light emitting element D2 is broken down and cannot emit light, and only the unbroken light emitting element can normally emit light. In this way, it is realized that only one of the first type light emitting element D1 and the second type light emitting element D2 in the same sub-pixel P emits light, avoiding the phenomenon that both of them emit light and cause the local area of the display panel to be bright, resulting in uneven brightness, thereby being beneficial to improving the overall display brightness uniformity of the display panel. The rated voltages of the first type light emitting element D1 and the second type light emitting element D2 are set to be different, and one of them is broken down by using the breakdown voltage, which is simple and reliable.

[0056] Figure 7 The illustrated embodiment shows the scheme that only one of the first type light emitting element D1 and the second type light emitting element D2 in the same sub-pixel P emits light, and the first type light emitting element D1 emits light in some sub-pixels P, and the second type light emitting element D2 emits light in some sub-pixels P.

[0057] Of course, in addition to adopting a breakdown voltage smaller than the rated voltage to break down the light emitting element, the same sub-pixel P can also be broken down by laser breakdown, and one of the two normally emitting light emitting elements in the same sub-pixel P can also be broken down, and the same effect of only one of the first type light emitting element D1 and the second type light emitting element D2 in the same sub-pixel P emitting light can also be achieved.

[0058] Figure 8 Another connection diagram of the first type light emitting element D1 and the second type light emitting element D2 in the second pixel area Q2 is shown, and in an optional embodiment of the present application, U1 < U2. Considering that when part of the first type light emitting element D1 in the second pixel area Q2 is damaged, the second type light emitting element D2 in the same sub-pixel P as the damaged first type light emitting element D1 in the second pixel area Q2 will be bound, and in an ideal case, the newly introduced second type light emitting element D2 is a normally emitting light emitting element. Therefore, in the second pixel area Q2, the present application sets the rated voltage U1 of the first type light emitting element D1 bound to the main conductive pad unit 11 to be smaller than the rated voltage U2 of the second type light emitting element D2 bound to the backup conductive pad unit 12, so that when a breakdown voltage between U1 and U2 is provided to the first type light emitting element D1 and the second type light emitting element D2 in the same sub-pixel P, the first type light emitting element D1 in the second pixel area Q2 will be broken down, and the unbroken light emitting element is the second type light emitting element D2 bound later, that is, the remaining light emitting element is a normally emitting light emitting element, so that the second type light emitting element D2 in each sub-pixel P in the second pixel area Q2 can normally emit light, for example, please refer to Figure 8 The present application adopts a method of uniformly breaking down the first type light emitting element D1 in the second pixel area Q2, and only retaining the second type light emitting element D2 which can normally emit light, which is simple in operation, high in yield, and is beneficial to improve the repair efficiency of the damaged first type light emitting element D1 in the display panel.

[0059] In an optional embodiment of the present application, in the second pixel area Q2, the rated voltage of the first type light emitting element D1 with the same light emitting color is the same, and the rated voltage of the second type light emitting element D2 with the same light emitting color is the same.

[0060] To realize the color display function of the display panel, the display panel is bound with light emitting elements capable of emitting light of different colors, and when the damaged first type light emitting element D1 is of a first color, the second type light emitting element D2 in the same sub-pixel P as the first type light emitting element D1 is also of the first color. The embodiment of the present application sets the rated voltage of the first type light emitting element D1 of the same light emitting color to be the same, and sets the rated voltage of the second type light emitting element D2 of the same light emitting color to be the same, so that the same specification and model of the first type light emitting element D1 and the same specification and model of the second type light emitting element D2 can be introduced on the display panel, which simplifies the types of the first type light emitting element D1 and the second type light emitting element D2 included on the display panel, thereby facilitating the breakdown difficulty of the light emitting element and improving the repair efficiency of the light emitting element on the display panel.

[0061] Figure 9 Fig. 1 shows a film layer structure in a single sub-pixel P in the first pixel region Q1, please refer to Figure 9 In an optional embodiment of the present application, in the first pixel region Q1, the surface of the spare conductive pad unit 12 away from the substrate is covered with an insulating protective layer 30.

[0062] Specifically, in the first pixel region Q1, the first type light emitting element D1 bound with the main conductive pad unit 11 can emit light normally, and thus the second type light emitting element D2 is not bound on the spare conductive pad unit 12. The surface of the spare conductive pad unit 12 in the first pixel region Q1 of the present application is covered with an insulating protective layer 30, which protects the spare conductive pad unit 12 without binding a light emitting element through the insulating protective layer 30, thereby facilitating the avoidance of the influence of the performance of the display panel caused by the attachment of impurities from the outside to the spare conductive pad unit. Optionally, the surface of each spare conductive pad unit in the display panel without binding the second type light emitting element is covered with an insulating protective layer, and if the second type light emitting element is not bound on part of the spare conductive pad units in the second pixel region, the surface of the corresponding spare conductive pad unit is also covered with an insulating protective layer.

[0063] In an optional embodiment of the present application, the insulating protective layer 30 comprises an organic material, for example, the insulating protective layer 30 is embodied as an organic film. When the organic film is used to cover the spare conductive pad unit 12, on the one hand, it can play a protective role for the spare conductive pad unit 12, and on the other hand, the organic film is relatively easy to remove, and when the first type light emitting element D1 on the main conductive pad unit 11 is damaged, the organic film on the spare conductive pad unit 12 corresponding to the damaged first type light emitting element D1 can be conveniently removed, so that the spare conductive pad unit 12 is exposed, so as to bind the second type light emitting element D2 on the exposed spare conductive pad unit 12.

[0064] In an optional embodiment of the present application, Figure 10The first type of light emitting element D1 and the second type of light emitting element D2 in the second pixel region Q2 are shown in the arrangement diagram, and the different fillings represent the different light emitting colors of the light emitting elements. Optionally, the first type of light emitting element D1 and the second type of light emitting element D2 respectively include red light emitting elements R, green light emitting elements G and blue light emitting elements B, and the working voltages of the red light emitting elements R, the green light emitting elements G and the blue light emitting elements B are respectively U R1 , U G1 and U B1 ; in the second type of light emitting element D2, the forward breakdown voltages of the red light emitting elements, the green light emitting elements and the blue light emitting elements are respectively U R2 , U G2 and U B2 , wherein U R1 <U R2 , U G1 <U G2 , U B1 <U B2 , U R1 <U G1 <U B1 , U R2 <U G2 <U B2 .

[0065] Specifically, in the second pixel region Q2, the light emitting colors of the first type of light emitting element D1 and the second type of light emitting element D2 in the same sub-pixel P are the same, and the light emitting elements in the adjacent three sub-pixels P can be respectively represented as red light emitting elements R, green light emitting elements G and blue light emitting elements B, so that the display panel realizes the function of color display. Due to the material difference of the red light emitting elements, the green light emitting elements and the blue light emitting elements, the turn-on voltage of the blue light emitting element is the largest, and the turn-on voltage of the red light emitting element is the smallest, so the working voltages of the three satisfy U R1 <U G1 <U B1 . For the same color light emitting element, the breakdown voltage needs to be greater than the working voltage so as to break down the corresponding light emitting element, and the present application sets the forward breakdown voltages of the red light emitting elements, the green light emitting elements and the blue light emitting elements to satisfy U R2 <U G2 <U B2 , when it is needed to break down one light emitting element in the same sub-pixel P by using the breakdown voltage, the breakdown voltage U R2 can break down one of the red light emitting elements with a smaller working voltage, and the value of the breakdown voltage U R2 is located between the working voltage values of the two red light emitting elements in the same sub-pixel P, and the breakdown voltage U G2one of the green light emitting elements having a smaller operating voltage can be broken down, and the breakdown voltage U G2 is located between the operating voltages of the two green light emitting elements in the same sub-pixel P, the breakdown voltage U B2 one of the blue light emitting elements having a smaller operating voltage can be broken down, and the breakdown voltage U B2 is located between the operating voltages of the two blue light emitting elements in the same sub-pixel P.

[0066] It can be understood that when one first type light emitting element D1 in the display panel cannot emit light due to damage or the like, the light emitting color of the damaged first type light emitting element D1 can be any one of red, green or blue. When two or more light emitting elements in the display panel cannot emit light due to damage or the like, the light emitting colors of the damaged first type light emitting elements D1 can be the same or different. When the light emitting colors of the damaged first type light emitting elements D1 are the same, the second type light emitting elements D2 of the corresponding light emitting colors can be bound in the sub-pixel P where the damaged first type light emitting element D1 is located and the surrounding sub-pixels P by one-time binding. When the light emitting colors of the damaged first type light emitting elements D1 are different, the binding of the second type light emitting elements D2 of one color can be completed first, and then the binding of the second type light emitting elements D2 of another color can be performed.

[0067] It can be understood that when the light emitting colors of the damaged first type light emitting elements D1 in the second pixel area Q2 are the same, the second type light emitting elements D2 of the corresponding light emitting colors are bound only on the spare conductive pad units 12 corresponding to the first type light emitting elements D1 in the second pixel area Q2, and the spare conductive pad units 12 corresponding to the first type light emitting elements D1 of other colors in the second pixel area Q2 do not need to be bound with the second type light emitting elements D2. Figure 10 Only the scheme in which the second type light emitting elements D2 are bound on the spare conductive pads corresponding to the first type light emitting elements D1 of one color in the second pixel area Q2 is shown, and in some other embodiments of the present application, when the light emitting colors of the damaged first type light emitting elements D1 include other colors, the second type light emitting elements D2 of the corresponding colors are also bound on the spare conductive pads corresponding to the damaged first type light emitting elements D1, and the present application does not make specific limitations thereon.

[0068] Figure 11An arrangement of the first type of light emitting elements D1 and the second type of light emitting elements D2 in the second pixel region Q2 is shown, in an optional embodiment of the present application, the second pixel region Q2 includes a first sub-region Q21 and a second sub-region Q22, the light emitting color of the second type of light emitting elements D2 in the first sub-region Q21 includes a first color, the light emitting color of the second type of light emitting elements D2 in the second sub-region Q22 includes a second color Figure 11 The light emitting color of the second type of light emitting elements D2 in the first sub-region Q21 and the second sub-region Q22 at least partially overlap to form an overlapping region Q00, the second type of light emitting elements D2 in the overlapping region Q00 include the second type of light emitting elements D2 of the first color and the second type of light emitting elements D2 of the second color.

[0069] Specifically, the present embodiment shows a scheme in which the second pixel region Q2 includes the first sub-region Q21 and the second sub-region Q22, considering that when the first type of light emitting elements D1 of the first color fails to emit light normally, the second type of light emitting elements D2 of the first color will be bound in the corresponding sub-pixel P and part of the sub-pixels P around the sub-pixel P, assuming that this part of the region is the first sub-region Q21. Considering that when the first type of light emitting elements D1 of the second color fails to emit light normally, the second type of light emitting elements D2 of the second color will be bound in the corresponding sub-pixel P and part of the sub-pixels P around the sub-pixel P, assuming that this part of the region is the second sub-region Q22. If the first type of light emitting elements D1 of the first color and the first type of light emitting elements D1 of the second color are close to each other, the first sub-region Q21 and the second sub-region Q22 will have an overlapping region Q00, and the light emitting color of the second type of light emitting elements D2 in the overlapping region includes the first color and the second color. In actual production, the binding of the second type of light emitting elements D2 of the first color can be completed in the first sub-region Q21 first, and then the binding of the second type of light emitting elements D2 of the second color can be completed in the second sub-region Q22, thereby realizing the repair of the first type of light emitting elements D1 of different light emitting colors.

[0070] Based on the same inventive concept, the present application also provides a display panel repair method, Figure 12 A flowchart of the display panel repair method provided by the present embodiment is shown, the repair method includes:

[0071] Step 101, providing a display panel, the display panel includes a main conductive pad unit 11 and a backup conductive pad unit 12, wherein the first type of light emitting elements D1 are bound on the main conductive pad unit 11; please refer to Figure 13 , Figure 13 A structural diagram of binding the first type of light emitting elements D1 on the main conductive pad unit 11 of the display panel is shown;

[0072] Step 102, providing a driving signal to the first light emitting element D1, and determining whether there is a first light emitting element D1 that does not emit light:

[0073] Step 103, if there is a first light emitting element D1 that does not emit light, then binding the second light emitting element D2 on the spare conductive pad unit 12 of the sub-pixel P region where the first light emitting element D1 that does not emit light is located and at least part of the sub-pixel P region adjacent to the sub-pixel P region, wherein the sub-pixel P region where the second light emitting element D2 is bound is the second pixel region Q2, and the sub-pixel P region where the second light emitting element is not bound is the first pixel region Q1; please refer to Figure 14 and Figure 15 , Figure 14 Fig. 1 shows a schematic diagram of the first light emitting element D1 that occurs damage on the display panel, Figure 15 Fig. 2 shows a schematic diagram of the second light emitting element D2 that is bound on the periphery of the damaged first light emitting element;

[0074] Step 104, when the first light emitting element D1 in the second pixel region Q2 emits light normally, controlling only one of the first light emitting element D1 and the second light emitting element D2 in the second pixel region Q2 to emit light, Figure 16 Fig. 3 shows a schematic diagram of only one of the first light emitting element D1 and the second light emitting element D2 emitting light in the same sub-pixel P.

[0075] Specifically, in the repairing method of the display panel provided by the embodiment of the present application, after the first type light emitting elements D1 are bound to each main conductive pad unit 11, it is detected whether each first type light emitting element D1 emits light normally. Optionally, the first type light emitting elements D1 at least include red light emitting elements R, green light emitting elements G and blue light emitting elements B. When it is detected that the first type light emitting element D1 bound to the main conductive pad unit 11 cannot emit light normally due to damage or other reasons, a second type light emitting element D2 is bound to the spare conductive pad unit 12 corresponding to the part of the sub-pixel P around the first type light emitting element D1, and the second type light emitting element D2 emits light normally, so as to realize the repairing of the damaged first type light emitting element D1. When the second type light emitting element D2 is also bound to the sub-pixel P corresponding to the normally emitting first type light emitting element D1, the simultaneous emission of the first type light emitting element D1 and the second type light emitting element D2 will cause the brightness of the corresponding sub-pixel P to be obviously higher than that of the sub-pixel P with only one light emitting element emitting light. Therefore, after the binding of the second type light emitting element D2, the present application controls only one of the first type light emitting element D1 and the second type light emitting element D2 in the same sub-pixel P in the second pixel area Q2 to emit light, so as to avoid the simultaneous emission of the first type light emitting element D1 and the second type light emitting element D2 in the sub-pixel P, thereby realizing the repairing of the first type light emitting element D1 and also being beneficial to improving the overall display brightness uniformity of the display panel.

[0076] It should be noted that the above embodiment only shows the scheme of repairing the display panel by binding the corresponding second type light emitting element D2 once when the damaged first type light emitting element D1 is of the same color. In some other embodiments of the present application, when the color of the damaged first type light emitting element D1 is two or more, the second type light emitting elements D2 of different colors need to be bound in batches, so as to realize the repairing function of the first type light emitting elements D1 of different colors.

[0077] In an optional embodiment of the present application, continuing to refer to Figures 13 to 16 , the rated voltages of the first type light emitting element D1 and the second type light emitting element D2 are different;

[0078] controlling only one of the first type light emitting element D1 and the second type light emitting element D2 in the second pixel area Q2 to emit light, specifically:

[0079] providing the first type light emitting element D1 and the second type light emitting element D2 in the second pixel area Q2 with a first forward breakdown voltage, and the voltage value of the first forward breakdown voltage is between the rated voltage values of the first type light emitting element D1 and the second type light emitting element D2;

[0080] breaking the one with the smaller rated voltage between the first type light emitting element D1 and the second type light emitting element D2 by using the first forward breakdown voltage.

[0081] Specifically, when the first type of light emitting element D1 and the second type of light emitting element D2 in the same sub-pixel P can normally emit light, the embodiment of the present application breaks down one of the first type of light emitting element D1 and the second type of light emitting element D2 in the same sub-pixel P by the forward breakdown voltage, and only retains one light emitting element that can normally emit light in each sub-pixel P, avoiding the phenomenon of uneven brightness of the display panel. By using the voltage breakdown method, without changing the structure of the circuit, without the help of external equipment, only the first type of light emitting element D1 and the second type of light emitting element D2 in the second pixel area Q2 are provided with the forward breakdown voltage, and the operation mode is simple and reliable.

[0082] In an optional embodiment of the present application, in the second pixel area Q2, the rated voltage value of the first type of light emitting element D1 is less than the rated voltage value of the second type of light emitting element D2.

[0083] Considering that when part of the first type of light emitting element D1 in the second pixel area Q2 is damaged, the second type of light emitting element D2 will be bound in the sub-pixel P with the same light emitting color as the damaged first type of light emitting element D1 in the second type of pixel area, and in the ideal case, the newly introduced second type of light emitting element D2 is a light emitting element that can normally emit light. Therefore, in the second pixel area Q2, the present application sets the rated voltage U1 of the first type of light emitting element D1 bound with the main conductive pad unit 11 to be less than the rated voltage U2 of the second type of light emitting element D2 bound with the backup conductive pad unit 12, so that when the first type of light emitting element D1 and the second type of light emitting element D2 in the same sub-pixel P are provided with a breakdown voltage with a voltage value between U1 and U2, the first type of light emitting element D1 in the second pixel area Q2 will be broken down, and the light emitting element that is not broken down is the second type of light emitting element D2 that is bound later, that is, the remaining light emitting element is a light emitting element that can normally emit light, so that the second type of light emitting element D2 in each sub-pixel P in the second pixel area Q2 can normally emit light, for example, please refer to Figure 8 The present application adopts the method of breaking down all the first type of light emitting element D1 in the second pixel area Q2, and only retaining the second type of light emitting element D2 that can normally emit light, which is simple in operation, high in yield, and is beneficial to improve the repair efficiency of the damaged first type of light emitting element D1 in the display panel.

[0084] Optionally, the light emitting element provided by the embodiment of the present application is Micro LED, Mini LED or light emitting diode, etc.

[0085] Based on the same inventive concept, the present application also provides a display device, Figure 17Fig. 1 is a top view of a display device provided by an embodiment of the present application, which includes the display panel 100 provided by any of the above embodiments. The present application is conducive to improving the overall display brightness uniformity of the display device while repairing the light emitting elements on the display panel.

[0086] It should be noted that the embodiments of the display device provided by the present application can refer to the embodiments of the array substrate and the display panel described above, which will not be described herein. The display device provided by the embodiments of the present application can be embodied as any product or component with display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, etc.

[0087] In summary, the display panel and the repairing method thereof and the display device provided by the present application at least achieve the following beneficial effects:

[0088] In the display panel and the display device provided by the present application, the light emitting elements include the first type light emitting elements and the second type light emitting elements, the first type light emitting elements connected with the main conductive pad units are arranged in the first pixel region, and the first type light emitting elements connected with the main conductive pad units and the second type light emitting elements connected with at least part of the standby conductive pad units are arranged in the second pixel region. When one or more of the first type light emitting elements in the second pixel region cannot emit light due to damage or other reasons, the second type light emitting element corresponding to the first type light emitting element that does not emit light can be controlled to emit light, thereby repairing the damaged light emitting element on the display panel. In particular, in the display stage, only one of the first type light emitting element and the corresponding second type light emitting element emits light in the second pixel region, thereby avoiding the phenomenon that the first type light emitting element and the corresponding second type light emitting element emit light at the same time, which causes the display panel to be locally too bright. Therefore, while repairing the damaged first type light emitting element, the overall display brightness uniformity of the display panel is also improved.

[0089] In the repairing method of the display panel provided by the present application, after the driving signal is provided to the first type light emitting element, when it is detected that there is a first type light emitting element that does not emit light on the display panel, the second type light emitting element is introduced in the sub-pixel region of the first type light emitting element and at least part of the sub-pixel regions adjacent to the sub-pixel region, so as to repair the sub-pixel region where the damaged first type light emitting element is located. In particular, when the first type light emitting element and the second type light emitting element in a certain sub-pixel region can normally emit light, the present application only controls one of the first type light emitting element and the second type light emitting element to emit light, thereby avoiding the phenomenon that the display panel is locally bright, and improving the overall display brightness uniformity of the product.

[0090] While certain specific embodiments of the application have been described in detail herein for the purposes of exemplification and to provide a thorough and enabling disclosure, it will be understood that the application is not limited to the particular embodiments described. Any modifications of the methods and materials described herein, which come within the scope and spirit of the application, are to be considered within the scope of the application. The scope of the application is to be determined by the claims appended hereto, which are to be construed in accordance with the principles of patent law.

Claims

1. A method for repairing a display panel, characterized in that, include: A display panel is provided, the display panel including a main conductive pad unit and a spare conductive pad unit, wherein a first type of light-emitting element is bonded on the main conductive pad unit; A driving signal is provided to the first type of light-emitting element to determine whether there is a non-light-emitting first type of light-emitting element: If there is a first type of light-emitting element that does not emit light, then a second type of light-emitting element is bound to the spare conductive pad unit of the sub-pixel region where the first type of light-emitting element that does not emit light is located and at least a portion of the sub-pixel regions adjacent to the sub-pixel region, wherein the sub-pixel region to which the second type of light-emitting element is bound is the second pixel region, and the sub-pixel region to which the second type of light-emitting element is not bound is the first pixel region. When the first type of light-emitting element in the second pixel area emits light normally, only one of the first type of light-emitting element and the second type of light-emitting element in the second pixel area is controlled to emit light.

2. The method for repairing a display panel according to claim 1, characterized in that, The rated voltages of the first type of light-emitting element and the second type of light-emitting element are different; The control of only one of the first type of light-emitting element and the second type of light-emitting element in the second pixel region to emit light specifically involves: A first forward breakdown voltage is provided to the first type of light-emitting element and the second type of light-emitting element in the second pixel region, wherein the voltage value of the first forward breakdown voltage is between the rated voltage values ​​of the first type of light-emitting element and the second type of light-emitting element; The first forward breakdown voltage is used to break down the one with the smaller rated voltage between the first type of light-emitting element and the second type of light-emitting element.

3. The method for repairing a display panel according to claim 2, characterized in that, In the second pixel region, the rated voltage value of the first type of light-emitting element is less than the rated voltage value of the second type of light-emitting element.

4. A display panel, characterized in that, Repairing the display panel using the repair method of any one of claims 1-3, comprising a substrate and a main conductive pad unit and a spare conductive pad unit located on one side of the substrate, wherein the display panel comprises a plurality of first pixel regions and second pixel regions; The display panel also includes a plurality of light-emitting elements, including a first type of light-emitting element and a second type of light-emitting element. In the first pixel area, the main conductive pad unit is connected to the first type of light-emitting element. In the second pixel region, the main conductive pad unit is connected to the first type of light-emitting element and at least a portion of the spare conductive pad unit is connected to the second type of light-emitting element; During the display phase, in the second pixel area, only one of the first type of light-emitting element and the second type of light-emitting element emits light.

5. The display panel according to claim 4, characterized in that, In the second pixel region, the first type of light-emitting element and the second type of light-emitting element are connected in parallel and emit the same color.

6. The display panel according to claim 4, characterized in that, In the second pixel region, the rated voltage of the first type of light-emitting element is U1, and the rated voltage of the second type of light-emitting element is U2, wherein U1 ≠ U2.

7. The display panel according to claim 6, characterized in that, U1 < U2.

8. The display panel according to claim 6, characterized in that, In the second pixel region, the first type of light-emitting elements with the same emission color have the same rated voltage, and the second type of light-emitting elements with the same emission color have the same rated voltage.

9. The display panel according to claim 4, characterized in that, In the first pixel region, the surface of the spare conductive pad unit away from the substrate is covered with an insulating protective layer.

10. The display panel according to claim 9, characterized in that, The insulating protective layer comprises organic materials.

11. The display panel according to claim 4, characterized in that, The first type of light-emitting element and the second type of light-emitting element respectively include a red light-emitting element, a green light-emitting element, and a blue light-emitting element, wherein the operating voltages of the red light-emitting element, the green light-emitting element, and the blue light-emitting element are respectively U R1 U G1 and U B1 In the second type of light-emitting element, the forward breakdown voltages of the red light-emitting element, the green light-emitting element, and the blue light-emitting element are U, respectively. R2 U G2 and U B2 , among which, U R1 <U R2 U G1 <U G2 U B1 <U B2 ;U R1 <U G1 <U B1 U R2 <U G2 <U B2 .

12. The display panel according to claim 4, characterized in that, The second pixel region includes a first sub-region and a second sub-region. The emission color of the second type of light-emitting element in the first sub-region includes a first color, and the emission color of the second type of light-emitting element in the second sub-region includes a second color. The first sub-region and the second sub-region at least partially overlap to form an overlapping region. The second type of light-emitting element in the overlapping region includes a second type of light-emitting element of the first color and a second type of light-emitting element of the second color.

13. A display device, characterized in that, The display panel includes any one of claims 4 to 12.

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