CN114914352A - Display panel, repairing method thereof and display device - Google Patents

Display panel, repairing method thereof and display device Download PDF

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Publication number
CN114914352A
CN114914352A CN202210344713.4A CN202210344713A CN114914352A CN 114914352 A CN114914352 A CN 114914352A CN 202210344713 A CN202210344713 A CN 202210344713A CN 114914352 A CN114914352 A CN 114914352A
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sub
pixel
pixels
electrode
display panel
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朱平
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Shanghai Tianma Microelectronics Co Ltd
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Shanghai Tianma Microelectronics Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
    • H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
    • H01L2933/0008—Processes
    • H01L2933/0033—Processes relating to semiconductor body packages
    • H01L2933/0066—Processes relating to semiconductor body packages relating to arrangements for conducting electric current to or from the semiconductor body

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The embodiment of the invention discloses a display panel, a repairing method thereof and a display device, wherein the display panel comprises: a plurality of sub-pixels on the first substrate, the sub-pixels including a plurality of first sub-pixels including a first electrode and a light emitting device bonded to the first electrode and a plurality of second sub-pixels including a redundant electrode; and the lead layer is positioned between the first substrate and the plurality of sub-pixels and comprises a plurality of first leads, and one redundant electrode corresponds to the M first electrodes through the M first leads respectively. In the embodiment of the invention, the number of the second sub-pixels is less than that of the first sub-pixels, and one second sub-pixel can be used as a substitute sub-pixel of more than 3 first sub-pixels, so that the area occupation ratio of the second sub-pixels in the display area is reduced, the design margin of the first sub-pixels is improved, the actual use area in the display area is increased, the resolution of the display panel can be improved, and the display effect is improved.

Description

Display panel, repairing method thereof and display device
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel, a repairing method thereof and a display device.
Background
In recent years, the display industry has been rapidly developed, and along with this, there is a strong competition in the display industry. At present, display panels mainly include liquid crystal display panels and organic light emitting display panels, and as the panel process is mature, many new display panels, such as micro-LED display panels, are also emerging.
The micro-LED display panel has the advantages of wide color gamut, high contrast, high response speed, long service life and the like, and is a novel display technology with the greatest potential. However, there are many problems, for example, the micro-LED may be abnormal during the transferring process, and thus the abnormal LED needs to be repaired.
At present, sub-pixels in a micro-LED display panel are designed with redundant electrodes, and new LEDs are transferred to the redundant electrodes to achieve the purpose of repairing. But this results in a low resolution of the micro-LED display panel.
Disclosure of Invention
The embodiment of the invention provides a display panel, a repairing method thereof and a display device, and aims to solve the problem of low resolution of the conventional display panel.
An embodiment of the present invention provides a display panel, including:
a first substrate;
a plurality of sub-pixels on the first substrate, the plurality of sub-pixels including a plurality of first sub-pixels and a plurality of second sub-pixels, the first sub-pixels including a first electrode and a light emitting device bonded to the first electrode, the second sub-pixels including a redundant electrode;
the lead layer is positioned between the first substrate and the plurality of sub-pixels and comprises a plurality of first leads, one redundant electrode corresponds to M first electrodes through M first leads respectively, and M is larger than or equal to 3.
The embodiment of the invention also provides a display device which comprises the display panel.
The embodiment of the invention also provides a repair method of a display panel, wherein the display panel is the display panel, and the repair method comprises the following steps:
when the first sub-pixel is detected to be broken, determining a first redundant electrode adjacent to the broken first sub-pixel;
if the first redundant electrode is not occupied, the first redundant electrode and the first electrode of the broken first sub-pixel are electrically conducted through the first lead;
if the first redundant electrode is occupied, searching a second redundant electrode which is adjacent to the first sub-pixel with the circuit break and is not occupied, and electrically conducting the second redundant electrode and the first electrode of the first sub-pixel with the circuit break through the first lead.
In the embodiment of the invention, the number of the second sub-pixels is less than that of the first sub-pixels, and one second sub-pixel can be used as a substitute sub-pixel of more than 3 first sub-pixels, so that the area ratio of the second sub-pixels in the display area of the display panel is far less than that of the first sub-pixels, the area ratio of the second sub-pixels in the display area is reduced, the design allowance of the first sub-pixels is improved, the actual use area in the display area is increased, the resolution of the display panel can be improved, and the display effect is improved.
Drawings
To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description, although being some specific embodiments of the present invention, can be extended and extended to other structures and drawings by those skilled in the art according to the basic concepts of the device structure, the driving method and the manufacturing method disclosed and suggested by the various embodiments of the present invention, without making sure that these should be within the scope of the claims of the present invention.
Fig. 1 is a schematic diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along A-A' of FIG. 1;
FIG. 3 is a schematic diagram of another display panel provided in an embodiment of the invention;
FIG. 4 is a cross-sectional view taken along line B-B' of FIG. 3;
FIG. 5 is a schematic diagram of another display panel according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of another display panel according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of another display panel according to an embodiment of the present invention;
FIG. 8 is a cross-sectional view taken along line C-C' of FIG. 7;
FIG. 9 is a schematic diagram of another display panel according to an embodiment of the present invention;
FIG. 10 is a cross-sectional view taken along D-D' of FIG. 9;
FIG. 11 is a diagram of another display panel according to an embodiment of the present invention;
FIG. 12 is a diagram of another display panel according to an embodiment of the present invention;
FIG. 13 is a diagram of another display panel according to an embodiment of the present invention;
FIG. 14 is a diagram of another display panel according to an embodiment of the present invention;
FIG. 15 is a schematic diagram of another display panel provided in an embodiment of the invention;
FIG. 16 is a cross-sectional view taken along E-E' of FIG. 15;
FIG. 17 is another cross-sectional view taken along E-E' of FIG. 15;
FIG. 18 is a diagram of another display panel according to an embodiment of the present invention;
fig. 19 is a schematic diagram of a method for repairing a display panel according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail and completely by embodiments with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the basic idea disclosed and suggested by the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1, a schematic diagram of a display panel according to an embodiment of the invention is shown, and fig. 2 is a cross-sectional view taken along a-a' of fig. 1. In this embodiment, the display panel includes: a first substrate 10; a plurality of sub-pixels 20 on the first substrate 10, the plurality of sub-pixels 20 including a plurality of first sub-pixels 21 and a plurality of second sub-pixels 22, the first sub-pixels 21 including first electrodes 211 and light emitting devices 212 bonded to the first electrodes 211, the second sub-pixels 22 including redundant electrodes 221; the conductive line layer 30 is disposed between the first substrate 10 and the plurality of sub-pixels 20, the conductive line layer 30 includes a plurality of first conductive lines 31, one redundant electrode 221 corresponds to the M first electrodes 211 through the M first conductive lines 31, and M is greater than or equal to 3.
The optional display panel is a light emitting diode display panel, which may be a micro light emitting diode display panel, or a nano unit size light emitting diode display panel, but is not limited thereto. It should be noted that the redundant electrode 221 and the first electrode 211 are located on the same layer and may be made of the same material, and the different filling patterns used for the redundant electrode 211 and the first electrode 211 in the figures are only for representing that the redundant electrode and the first electrode are electrodes with different functions, and do not refer to different layers or different materials.
In this embodiment, the first substrate 10 includes a pixel driving circuit, a plurality of sub-pixels 20 are disposed on the first substrate 10, and the pixel driving circuit drives each sub-pixel 20 to perform display. The selectable pixel driving circuit includes a plurality of pixel circuits, and the pixel circuits are disposed in one-to-one correspondence with the sub-pixels 20 and electrically connected to the sub-pixels, wherein the pixel driving circuit controls the corresponding sub-pixels 20 to display through the pixel circuits. The structure of the pixel driving circuit and the process of driving the sub-pixels are not described in detail herein, and any pixel driving circuit suitable for the led display panel falls within the scope of the present invention.
The first substrate 10 is provided with a plurality of sub-pixels 20, the plurality of sub-pixels 20 are divided into a first sub-pixel 21 and a second sub-pixel 22, the first sub-pixel 21 includes a first electrode 211 and a light emitting device 212 bonded to the first electrode 211, the second sub-pixel 22 includes a redundant electrode 221, and the second sub-pixel 22 is a replacement sub-pixel. In the normal display situation of the first sub-pixel 21, the second sub-pixel 22 is not actually used. If one or more first sub-pixels 21 are bad or the light emitting devices 212 thereof are abnormal, the first sub-pixels 21 cannot be normally displayed, and at this time, a new light emitting device is transferred to the second sub-pixel 22 electrically connected to the abnormal first sub-pixel 21, so that the second sub-pixel 22 can replace the abnormal first sub-pixel 21 to normally display, the purpose of repairing the abnormal first sub-pixel 21 is realized, and the display effect of the display panel is ensured.
A conductive line layer 30 is disposed between the first substrate 10 and the plurality of sub-pixels 20, the conductive line layer 30 includes a plurality of first conductive lines 31, one redundant electrode 221 corresponds to the M first electrodes 211 through the M first conductive lines 31, and M is greater than or equal to 3. In this embodiment, the number of the second sub-pixels 22 is less than that of the first sub-pixels 21, and if M is 3, one second sub-pixel 22 can be used as a replacement sub-pixel for 3 first sub-pixels 21, and the redundant electrode 221 of the second sub-pixel 22 is connected to the first electrodes 211 of the corresponding M first sub-pixels 21 through the M first conductive wires 31.
With the progress of the display panel manufacturing process, the defective rate of the defective first sub-pixels or the abnormal transfer of the light emitting devices in the display area is reduced, and after the yield of the first sub-pixels is improved, a large number of replacement sub-pixels are not actually used, and if the occupation ratio of the replacement sub-pixels in the display area is too much, the actual use area in the display area of the display panel is small, and the resolution is low. Based on this, in this embodiment, the number of the second sub-pixels 22 is designed to be less than that of the first sub-pixels 21, and one second sub-pixel 22 can be used as a substitute sub-pixel for more than 3 first sub-pixels 21, so that the area ratio of the second sub-pixel 22 in the display area of the display panel is much smaller than that of the first sub-pixel 21, the area ratio of the second sub-pixel 22 in the display area is reduced, the design margin of the first sub-pixel 21 is increased, the actual use area in the display area is increased, the resolution of the display panel can be increased, and the display effect is further improved.
As shown in fig. 1, an exemplary second sub-pixel 22 corresponds to 3 first sub-pixels 21 on the left, and then the redundant electrode 221 of the second sub-pixel 22 is connected to the first electrodes 211 of the corresponding 3 first sub-pixels 21 through 3 first conductive lines 31. In fig. 1, a first end of the first conductive line 31 is electrically connected to the first electrode 211 of the corresponding first sub-pixel 21 through a through hole, a second end of the first conductive line 31 is electrically connected to the redundant electrode 221 of the corresponding second sub-pixel 22 through a through hole, and the first conductive line 31 is in an off state in an original state, that is, the first end and the second end of the first conductive line 31 are not electrically conducted in the original state. In the case of normal display of the first sub-pixel 21, the second sub-pixel 22 does not need to be repaired, and the first conductive line 31 between the second sub-pixel 22 and the normally displayed first sub-pixel 21 is in a disconnected state.
Referring to fig. 3, a schematic view of another display panel according to an embodiment of the present invention is shown, and fig. 4 is a cross-sectional view taken along B-B' of fig. 3. Referring to fig. 3 and 4, if the first sub-pixel 21a is defective or the light emitting device 212 thereof is abnormally shifted, the unused second sub-pixel 22a is selected to repair the first sub-pixel 21 a. Specifically, the abnormal light emitting device 212 in the first sub-pixel 21a is removed; transferring a new light emitting device 222 to the redundant electrode 221 of the second sub-pixel 22 a; finally, the first conductive line 31 between the redundant electrode 221 of the second subpixel 22a and the first electrode 211 of the first subpixel 21a is repaired to be electrically conducted. Therefore, the redundant electrode 221 of the second sub-pixel 22a is electrically connected with the first electrode 211 of the first sub-pixel 21a through the first conducting wire 31, and the second sub-pixel 22a replaces the abnormal first sub-pixel 21a to perform display, so that the abnormal sub-pixel is repaired, and the display effect of the display panel is improved.
In the embodiment of the invention, the number of the second sub-pixels is less than that of the first sub-pixels, and one second sub-pixel can be used as a substitute sub-pixel of more than 3 first sub-pixels, so that the area ratio of the second sub-pixels in the display area of the display panel is far smaller than that of the first sub-pixels, the area ratio of the second sub-pixels in the display area is reduced, the design allowance of the first sub-pixels is improved, the actual use area in the display area is increased, the resolution of the display panel can be improved, and the display effect is improved.
A plurality of sub-pixels can be selected to form a plurality of pixel units which are arranged in an array; the pixel unit includes three first sub-pixels and one second sub-pixel. In the selectable pixel unit, three first sub-pixels respectively emit red light, green light and blue light.
Fig. 5 is a schematic view of another display panel according to an embodiment of the present invention. As shown in fig. 5, the display area of the display panel includes a plurality of pixel units 1 arranged in an array, the pixel unit 1 includes 4 sub-pixels, and the four sub-pixels include three first sub-pixels 21 and one second sub-pixel 22. In the pixel unit 1, the second sub-pixel 22 is used as a replacement sub-pixel for the three first sub-pixels 21, and can be used as a replacement sub-pixel to replace the abnormal first sub-pixel 21 when the first sub-pixel 21 is abnormal. Specifically, in the pixel unit 1, the redundant electrode of the second sub-pixel 22 corresponds to the first electrodes of the 3 first sub-pixels 21 through 3 first wires; when the first sub-pixel 21 is abnormal, the first lead line connected with the abnormal first sub-pixel 21 is conducted, and the redundant electrode of the second sub-pixel 22 and the first electrode of the abnormal first sub-pixel 21 are electrically conducted through the first lead; a new light emitting device is transferred to the redundant electrode of the second sub-pixel 22, and the light emitting device of the first sub-pixel 21 is removed, so that the second sub-pixel 22 replaces the abnormal first sub-pixel 21 to perform normal display, and the abnormal first sub-pixel 21 is removed.
With the progress of the display panel manufacturing process, the manufacturing yield of the first sub-pixels 21 is greatly improved, and the probability that two or more abnormal first sub-pixels 21 appear in one pixel unit 1 is very small, so that one second sub-pixel 22 is designed in the pixel unit 1 to be used as a substitute sub-pixel for three first sub-pixels 21, and the repair requirements of 3 first sub-pixels 21 in the pixel unit are met. According to the structural design, the area of the display area occupied by the second sub-pixel 22 can be reduced, the area of the display area occupied by the first sub-pixel 21 is increased, and the resolution of the display panel is improved.
In the pixel unit 1, the three first sub-pixels 21 include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, and the three first sub-pixels 21 in the pixel unit 1 may be arranged in the color order of RGB. However, the number and the color arrangement order of the first sub-pixels in the pixel unit are not limited thereto, and the related practitioners can reasonably design the number and the color arrangement order of the first sub-pixels in the pixel unit according to the needs of the product. For example, the selectable pixel unit includes 4 first sub-pixels, the 4 first sub-pixels include a red sub-pixel R, a green sub-pixel G, a blue sub-pixel B, and a yellow sub-pixel Y, and the color arrangement order is GBWR.
The 4 sub-pixels in the selectable pixel unit 1 are arranged sequentially in the row direction. The three first sub-pixels 21 in the selectable pixel unit 1 are adjacently disposed.
As shown in fig. 5, the sub-pixels in the selectable pixel unit 1 are sequentially arranged along the row direction, and the sub-pixels in the display area are arranged in an array. In the selectable pixel unit 1, three first sub-pixels 21 are adjacently arranged, and a second sub-pixel 22 can be arranged at the tail of the pixel unit 1; alternatively, as shown in fig. 6, in the optional pixel unit 1, three first sub-pixels 21 are adjacently disposed, and a second sub-pixel 22 may be disposed at the head of the pixel unit 1.
It is to be understood that the arrangement of the first sub-pixel 21 and the second sub-pixel 22 in the pixel unit 1 along the row direction is not limited to that shown in the figure. In other embodiments, the second sub-pixel in the pixel unit is located between 3 first sub-pixels, which is not limited to this.
In the row direction, the first electrodes correspond to the two redundant electrodes on the two sides through the two first wires respectively.
Referring to fig. 7, a schematic view of another display panel according to an embodiment of the present invention is shown, and fig. 8 is a cross-sectional view taken along line C-C' of fig. 7. In this embodiment, the pixel units in the display area are arranged in an array, and the 4 sub-pixels 20 in the pixel unit are sequentially arranged along the row direction, then along the row direction, a plurality of first sub-pixels 21 are disposed between two adjacent second sub-pixels 22, and for any one of the first sub-pixels 21, the first electrode 211 of the first sub-pixel 21 may respectively correspond to the redundant electrodes 221 of the two second sub-pixels 22 on two sides through two first wires 31, so that one first sub-pixel 21 corresponds to two supplementary second sub-pixels 22.
Compared with the pixel unit in fig. 1 in which one first sub-pixel 21 corresponds to one alternative second sub-pixel 22, in the present embodiment, two second sub-pixels 22 are designed as alternative sub-pixels of three first sub-pixels 21 in the pixel unit, and one first sub-pixel 21 corresponds to two alternative second sub-pixels 22, so that the alternative sub-pixels of the abnormal first sub-pixel 21 are optional, which not only can satisfy the repair requirement that 1 abnormal first sub-pixel 21 occurs in the pixel unit, but also can further satisfy the repair requirement that two abnormal first sub-pixels 21 occur in the pixel unit at the same time. On the basis of reducing the display area occupied by the second sub-pixel 22, the display effect is also improved.
As shown in fig. 7 and 8, an exemplary one of the second sub-pixels 22 corresponds to 6 first sub-pixels 21 on the left and right sides, and then the redundant electrode 221 of the second sub-pixel 22 is connected to the first electrodes 211 of the corresponding 6 first sub-pixels 21 through 6 first conductive lines 31. Accordingly, the first electrode 211 of the first sub-pixel 21 is connected to the redundant electrodes 221 of the corresponding 2 second sub-pixels 22 through the 2 first conductive lines 31. When the first sub-pixel 21 displays normally and the second sub-pixel 22 is not used, the first wire 31 between the second sub-pixel 22 and the normally displayed first sub-pixel 21 is in a disconnected state.
Referring to fig. 9, a schematic view of another display panel according to an embodiment of the present invention is shown, and fig. 10 is a cross-sectional view taken along line D-D' of fig. 9. Referring to fig. 9 and 10, if the first sub-pixel 21a is defective or the light emitting device 212 thereof is abnormally shifted, the unused second sub-pixel 22a is selected to repair the first sub-pixel 21 a. Specifically, the abnormal light emitting device 212 in the first sub-pixel 21a is removed; transferring a new light emitting device 222 to the redundant electrode 221 of the second sub-pixel 22 a; finally, the first conductive line 31 between the redundant electrode 221 of the second subpixel 22a and the first electrode 211 of the first subpixel 21a is repaired to be electrically conducted. Therefore, the redundant electrode 221 of the second sub-pixel 22a is electrically connected with the first electrode 211 of the first sub-pixel 21a through the first conducting wire 31, and the second sub-pixel 22a replaces the abnormal first sub-pixel 21a to perform display, so that the abnormal sub-pixel is repaired, and the display effect of the display panel is improved.
Further, if a display abnormality occurs in the first sub-pixel 21b and its corresponding one of the second sub-pixels 22a has been used to repair other first sub-pixels, the second sub-pixel 22b may be used to repair the first sub-pixel 21b when it is determined that its corresponding other second sub-pixel 22b is not used.
A plurality of sub-pixels can be selected to form a plurality of pixel units which are arranged in an array; the pixel unit includes three first sub-pixels and one second sub-pixel. In the selectable pixel unit, three first sub-pixels respectively emit red light, green light and blue light. The centers of the 4 sub-pixels in the selectable pixel unit form a first virtual quadrangle. The 4 sub-pixels in the selectable pixel unit are distributed in two adjacent rows.
Fig. 11 is a schematic view of another display panel according to an embodiment of the present invention. As shown in fig. 11, the pixel units 1 in the alternative display panel are arranged in an array, and the pixel unit 1 includes a second sub-pixel 22 and 3 first sub-pixels 21, where the second sub-pixel 22 may be a sub-pixel that is a substitute for the 3 first sub-pixels 21. Specifically, in the pixel unit 1, the redundant electrode of the second sub-pixel 22 corresponds to one first sub-pixel 21 through one first conducting wire 31.
As shown in fig. 11, the centers of 4 sub-pixels in the optional pixel unit 1 form a first virtual quadrangle, specifically, the geometric centers of 4 sub-pixels in the pixel unit 1 are sequentially connected to form a first virtual quadrangle, which may be a regular quadrangle or an irregular quadrangle, and the shape of the virtual quadrangle is not specifically limited. The arrangement positions of the second sub-pixel 22 and the 3 first sub-pixels 21 in the pixel unit 1 are convenient for designing the first conducting wire 31, for example, the first conducting wire 31 between the second sub-pixel 22 and the first sub-pixel 21 is arranged linearly, wherein the first conducting wire 31R is arranged between the second sub-pixel 22 and the first sub-pixel 21/R, the first conducting wire 31G is arranged between the second sub-pixel 22 and the first sub-pixel 21/G, and the first conducting wire 31B is arranged between the second sub-pixel 22 and the first sub-pixel 21/B. The 4 sub-pixels in the optional pixel unit 1 are distributed in two adjacent rows, so that the process manufacturing difficulty can be reduced, the number of sub-pixels in one row can be increased in the row direction, and the resolution is improved. It is understood that the number of sub-pixels in a pixel unit and the arrangement of the sub-pixels are not limited to those shown in the drawings.
The first virtual quadrangle may be selected as a parallelogram. One second sub-pixel and 6 first sub-pixels can be selected to be respectively arranged adjacently, and the 6 first sub-pixels are distributed in adjacent 2 x 2 pixel units; the redundant electrode of the second sub-pixel corresponds to the 6 first sub-pixels through the 6 first wires respectively.
Fig. 12 is a schematic view of another display panel according to an embodiment of the present invention. As shown in fig. 12, the first virtual quadrangle can be selected as a parallelogram, and then one second sub-pixel 22 is not only arranged adjacent to the 3 first sub-pixels 21 of the pixel unit 1, but also adjacent to the first sub-pixels 21 of the 3 adjacent pixel units 1. Based on this, the redundant electrode of the second sub-pixel 22 corresponds to the 6 first sub-pixels 21 through the 6 first wires 31, respectively.
Specifically, the redundant electrode of the second sub-pixel 22 is correspondingly connected to the first sub-pixel 21/G in the pixel unit 1 through the first conducting wire 311, the redundant electrode of the second sub-pixel 22 is correspondingly connected to the first sub-pixel 21/R in the pixel unit 1 through the first conducting wire 312, the redundant electrode of the second sub-pixel 22 is correspondingly connected to the first sub-pixel 21/B in the pixel unit 1 through the first conducting wire 313, the redundant electrode of the second sub-pixel 22 is correspondingly connected to the first sub-pixel 21 in the adjacent pixel unit 1 in the column direction through the first conducting wire 314, the redundant electrode of the second sub-pixel 22 is correspondingly connected to the first sub-pixel 21 in the adjacent pixel unit 1 in the diagonal direction through the first conducting wire 315, and the redundant electrode of the second sub-pixel 22 is correspondingly connected to the first sub-pixel 21 in the adjacent pixel unit 1 in the row direction through the first conducting wire 316.
As described above, one first sub-pixel 21 is correspondingly connected with two alternative second sub-pixels 22, wherein one second sub-pixel 22 and the first sub-pixel 21 are located in the same pixel unit 1, and the other second sub-pixel 22 and the first sub-pixel 21 are located in different pixel units 1, so that the alternative sub-pixels of the abnormal first sub-pixel 21 are optional, and the repair requirement that two abnormal first sub-pixels 21 occur in the pixel unit at the same time can be further satisfied. On the basis of reducing the display area occupied by the second sub-pixel 22, the display effect is also improved.
The first virtual quadrangle may be selected to be rectangular. One second sub-pixel and 8 first sub-pixels can be selected to be respectively arranged adjacently, and the 8 first sub-pixels are distributed in adjacent 2 x 2 pixel units; the redundant electrode of the second sub-pixel corresponds to the 8 first sub-pixels through the 8 first wires respectively.
Fig. 13 is a schematic view of another display panel according to an embodiment of the present invention. As shown in fig. 13, the first virtual quadrangle may be a rectangle, and then one second sub-pixel 22 is disposed adjacent to not only the 3 first sub-pixels 21 of the pixel unit 1 but also the first sub-pixels 21 of the adjacent 3 pixel units 1. Based on this, the redundant electrode of the second sub-pixel 22 corresponds to 8 first sub-pixels 21 through 8 first wires 31, respectively. Specifically, the redundant electrode of the second sub-pixel 22 is correspondingly connected to the first sub-pixel 21/G in the pixel unit 1 through the first conducting wire 311, the redundant electrode of the second sub-pixel 22 is correspondingly connected to the first sub-pixel 21/R in the pixel unit 1 through the first conducting wire 312, the redundant electrode of the second sub-pixel 22 is correspondingly connected to the first sub-pixel 21/B in the pixel unit 1 through the first conducting wire 313, the redundant electrode of the second sub-pixel 22 is correspondingly connected to 2 first sub-pixels 21 in the adjacent pixel unit 1 in the column direction through the first conducting wires 314 and 315, the redundant electrode of the second sub-pixel 22 is correspondingly connected to the first sub-pixel 21 in the adjacent pixel unit 1 in the diagonal direction through the first conducting wire 316, and the redundant electrode of the second sub-pixel 22 is correspondingly connected to 2 first sub-pixels 21 in the adjacent pixel unit 1 in the row direction through the first conducting wires 317 and 318.
As described above, one first sub-pixel 21 is correspondingly connected with two alternative second sub-pixels 22, wherein one second sub-pixel 22 and the first sub-pixel 21 are located in the same pixel unit 1, and the other second sub-pixel 22 and the first sub-pixel 21 are located in different pixel units 1, so that the alternative sub-pixels of the abnormal first sub-pixel 21 are optional, and the repair requirement that two abnormal first sub-pixels 21 occur in the pixel unit at the same time can be further satisfied. On the basis of reducing the display area occupied by the second sub-pixel 22, the display effect is also improved.
Those skilled in the art can understand that according to different pixel arrangement modes, the line routing mode of the redundant electrode and the first electrode can be reasonably adjusted, so that the condition that the redundant electrode of 1 second sub-pixel corresponds to the first electrodes of a plurality of first sub-pixels to be repaired is realized. Fig. 14 is a schematic diagram of another display panel according to an embodiment of the present invention, as shown in fig. 14, the distances between the optional second sub-pixel 22 and the corresponding repaired 6 first sub-pixels 21 may be equal, so that after the second sub-pixel 22 repairs the abnormal first sub-pixel 21, the light emitting position is changed from the first sub-pixel 21 to the second sub-pixel 22, and the distances between the second sub-pixel 22 and the corresponding repaired 6 first sub-pixels 21 may be equal, so that the distance difference of the light emitting position change may be reduced, and the influence on the visual effect may be reduced. In addition, the first conductive line 31 between the second sub-pixel 22 and the first sub-pixel 21 may extend in the row direction or the column direction as shown in fig. 14, without particular limitation.
Referring to fig. 15, a schematic view of another display panel according to an embodiment of the present invention is shown, and fig. 16 is a cross-sectional view taken along line E-E' of fig. 15. As shown in fig. 15 and 16, the optional first wire 31 includes a first branch 31a and a second branch 31b, which are disconnected, and an electrical connection structure 31c located between the first branch 31a and the second branch 31 b; the first branch line 31a is electrically connected to the redundant electrode 221, the second branch line 31b is electrically connected to the first electrode 211, and the electrical connection structure 31c is used for selectively connecting the first branch line 31a and the second branch line 31 b. Fig. 17 is another cross-sectional view taken along line E-E' of fig. 15, where the light emitting device 212 bonded with the optional first electrode 211 is disconnected, and the first branch line 31a and the second branch line 31b of the first wire 31 are electrically connected by the electrical connection structure 31 c. It is understood that each first conductive line 31 includes an electrical connection structure 31c, and only the electrical connection structure 31c and its on-off state of one of the first conductive lines 31 are illustrated herein.
In this embodiment, the first conductive line 31 includes a first branch line 31a and a second branch line 31b, and the first conductive line 31 further includes an electrical connection structure 31c between the first branch line 31a and the second branch line 31 b. For the first conductive line 31, the first branch line 31a and the second branch line 31b are located in the same layer, and the electrical connection structure 31c and the first branch line 31a are located in different layers. In the direction perpendicular to the display panel, the electrical connection structure 31c of the first conductive line 31 overlaps the first branch line 31a, and the electrical connection structure 31c overlaps the second branch line 31 b.
The electrical connection structure 31c may be melted by a laser. As shown in fig. 16, in the original state, the electrical connection structure 31c is overlapped with the first branch line 31a and the second branch line 31b in an insulating manner, so that the first wire 31 remains in the off state, and the first sub-pixel 21 and the second sub-pixel 22 connected by the first wire 31 remain off. As shown in fig. 17, after the electrical connection structure 31c is melted by laser, the electrical connection structure 31c is electrically connected to the first branch line 31a and the second branch line 31b, and then the electrical connection structure 31c conducts the first branch line 31a and the second branch line 31b, so that the first conductive line 31 is electrically conducted, and further the first sub-pixel 21a and the second sub-pixel 22a connected to the first conductive line 31 are electrically conducted, and at this time, the second sub-pixel 22a replaces the first sub-pixel 21a for displaying.
When the second sub-pixel 22 is not used, all of the M first wires 31 connected to the second sub-pixel 22 are kept in an off state. When the light emitting device 212 bonded to the first electrode 211 of the first sub-pixel 21a is disconnected, and the second sub-pixel 22a needs to replace the defective first sub-pixel 21a, the first wires 31 between the second sub-pixel 22a and the repaired first sub-pixel 21a are controlled to be electrically connected, the first wires 31 between the second sub-pixel 22a and the other corresponding first sub-pixels 21 are kept in a disconnected state, and a new light emitting device 222 is transferred to the redundant electrode 221 of the second sub-pixel 22a, so that the second sub-pixel 22a replaces the first sub-pixel 21a for displaying.
Referring to fig. 18, which is a schematic diagram of another display panel according to an embodiment of the present invention, as shown in fig. 18, the optional sub-pixel 20 further includes a second electrode 23; the first electrode 211 and the redundant electrode 221 are anodes, and the second electrode 23 is a cathode; alternatively, the first electrode 211 and the redundant electrode 221 are cathodes, and the second electrode 23 is an anode. In the present embodiment, the first subpixel 20 includes a first electrode 211 and a second electrode 23, and a light emitting device 212 bonded between the first electrode 211 and the second electrode 23. The pixel driving circuit provides different electrical signals to the first electrode 211 and the second electrode 23 through the pixel circuit, and then the current flows through the light emitting device 212 to make the light emitting device 212 emit light, which is not detailed herein for the light emitting principle of the sub-pixel 20.
The first electrode 211 and the second electrode 23 are optionally disposed in the same layer. The first electrode 211 and the second electrode 23 of the sub-pixel 20 may be disposed on the same side of the light emitting device 212, and in other embodiments the first electrode and the second electrode of the sub-pixel may be disposed on different sides of the light emitting device. The structure of the sub-pixels is not particularly limited herein.
As shown in fig. 18, in the selectable row of sub-pixels 20, the second electrodes 23 are electrically connected. In this embodiment, the second electrodes 23 of a row of sub-pixels 20 are electrically connected, and the pixel driving circuit provides the same electrical signal to the second electrodes 23 of a row of sub-pixels 20. When the sub-pixel 20 is controlled to display, the sub-pixel 20 can be controlled to emit light by providing a corresponding electrical signal to the first electrode 211 of the corresponding sub-pixel 20.
Based on the same inventive concept, embodiments of the present invention also provide a display device, which includes the display panel as described above. The display device comprises a display panel, other components and film layers for the display panel to work, and for example, the display device further comprises a power structure such as a main board to drive the display panel to work normally. The display device may be selected to be a micro light emitting diode display device, but is not limited thereto.
The embodiment of the invention also provides a repair method of the display panel, and the display panel is the display panel described in any embodiment. Referring to fig. 19, which is a schematic diagram of a repairing method of a display panel according to an embodiment of the present invention, as shown in fig. 19, the repairing method includes:
step S100, when the first sub-pixel is detected to be broken, determining a first redundant electrode adjacent to the broken first sub-pixel;
step S110, if the first redundant electrode is not occupied, the first redundant electrode is electrically conducted and the first electrode of the first sub-pixel is disconnected through a first lead;
step S120, if the first redundant electrode is occupied, searching for a second redundant electrode adjacent to and unoccupied in the open-circuit first sub-pixel, and electrically connecting the second redundant electrode and the first electrode of the open-circuit first sub-pixel through the first wire.
The length of the first lead wire for selectively connecting the first redundant electrode and the first electrode is less than or equal to the length of the first lead wire for connecting the second redundant electrode and the first electrode.
The optional first lead comprises a first branch line and a second branch line which are disconnected, and an electric connection structure positioned between the first branch line and the second branch line, wherein the first branch line is electrically connected with the redundant electrode, and the second branch line is electrically connected with the first electrode; the first electrode electrically connecting the first redundant electrode and the first sub-pixel via the first conducting wire comprises: and melting the electrical connection structure by laser to enable the first branch line and the second branch line to be conducted through the electrical connection structure.
In the pixel unit, one first sub-pixel corresponds to at least two second sub-pixels. The repairing process for the abnormal first sub-pixel is as follows: firstly, determining a second sub-pixel nearest to the abnormal first sub-pixel and detecting; if the second sub-pixel is detected to be occupied, namely the second sub-pixel is used for repairing other first sub-pixels, other second sub-pixels which are connected with the broken first sub-pixel and are not occupied are searched; and after the target second sub-pixel is found, controlling the first lead between the second redundant electrode of the target second sub-pixel and the first electrode of the open circuit first sub-pixel to be electrically conducted so as to repair the open circuit first sub-pixel by the target second sub-pixel.
The first wire can be selected to realize electrical conduction by adopting a silver paste printing method.
In this embodiment, the redundant electrode of one second sub-pixel corresponds to the first electrodes of the M first sub-pixels through the M first wires, respectively, and M is greater than or equal to 3. The yield of the first sub-pixels is greatly improved at present, and the probability that more than two abnormal first sub-pixels appear in one pixel unit is very low, so that the number of the designed second sub-pixels can meet the requirement, the occupied area of the redundant electrode in a display area is reduced, and the resolution of a display panel is improved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (21)

1. A display panel, comprising:
a first substrate;
a plurality of sub-pixels on the first substrate, the plurality of sub-pixels including a plurality of first sub-pixels including a first electrode and a light emitting device bonded to the first electrode, and a plurality of second sub-pixels including a redundant electrode;
the lead layer is positioned between the first substrate and the plurality of sub-pixels and comprises a plurality of first leads, one redundant electrode corresponds to M first electrodes through M first leads respectively, and M is larger than or equal to 3.
2. The display panel according to claim 1, wherein the plurality of sub-pixels constitute a plurality of pixel units arranged in an array;
the pixel unit includes three of the first sub-pixels and one of the second sub-pixels.
3. The display panel according to claim 2, wherein three of the first sub-pixels in the pixel unit emit red light, green light, and blue light, respectively.
4. The display panel according to claim 2, wherein the 4 subpixels in the pixel unit are sequentially arranged in a row direction.
5. The display panel according to claim 4, wherein three of the first sub-pixels in the pixel unit are adjacently disposed.
6. The display panel according to claim 4, wherein the first electrodes respectively pass through two of the redundant electrodes on two corresponding sides of the two first conductive lines along the row direction.
7. The display panel according to claim 2, wherein centers of 4 sub-pixels in the pixel unit form a first virtual quadrangle.
8. The display panel of claim 7, wherein the 4 sub-pixels in the pixel unit are distributed in two adjacent rows.
9. The display panel of claim 7, wherein the first virtual quadrilateral is a parallelogram.
10. The display panel according to claim 9, wherein one of the second sub-pixels is disposed adjacent to 6 of the first sub-pixels, respectively, and the 6 of the first sub-pixels are distributed in 2 × 2 adjacent pixel units;
the redundant electrode of the second sub-pixel corresponds to the 6 first sub-pixels through the 6 first wires respectively.
11. The display panel of claim 7, wherein the first virtual quadrilateral is a rectangle.
12. The display panel according to claim 11, wherein one of the second sub-pixels is disposed adjacent to 8 of the first sub-pixels, and the 8 of the first sub-pixels are distributed in 2 × 2 adjacent pixel units;
the redundant electrode of the second sub-pixel corresponds to the 8 first sub-pixels through the 8 first wires respectively.
13. The display panel of claim 1, wherein the first conductive line comprises a first branch line and a second branch line that are disconnected and an electrical connection structure between the first branch line and the second branch line;
the first branch line is electrically connected with the redundant electrode, the second branch line is electrically connected with the first electrode, and the electric connection structure is used for selectively conducting the first branch line and the second branch line.
14. The display panel of claim 13, wherein the light emitting device of the first electrode bond is open, and the first branch and the second branch of the first conductive line are electrically connected through the electrical connection structure.
15. The display panel of claim 1, wherein the sub-pixel further comprises a second electrode;
the first electrode and the redundant electrode are anodes, and the second electrode is a cathode; alternatively, the first and second liquid crystal display panels may be,
the first electrode and the redundant electrode are cathodes, and the second electrode is an anode.
16. The display panel according to claim 15, wherein the first electrode and the second electrode are provided in the same layer.
17. The display panel according to claim 15, wherein in a row of sub-pixels, each of the second electrodes is electrically connected.
18. A display device comprising the display panel according to any one of claims 1 to 17.
19. A method of repairing a display panel according to any one of claims 1 to 17, the method comprising:
when the first sub-pixel is detected to be broken, determining a first redundant electrode adjacent to the broken first sub-pixel;
if the first redundant electrode is not occupied, the first redundant electrode and the first electrode of the broken first sub-pixel are electrically conducted through the first lead;
if the first redundant electrode is occupied, searching a second redundant electrode which is adjacent to the first sub-pixel with the circuit break and is not occupied, and electrically conducting the second redundant electrode and the first electrode of the first sub-pixel with the circuit break through the first lead.
20. The repair method of claim 19, wherein a first lead length connecting the first redundant electrode and the first electrode is less than or equal to a first lead length connecting the second redundant electrode and the first electrode.
21. The repair method of claim 19 wherein the first wire includes first and second branches that are disconnected and an electrical connection structure between the first and second branches, the first branch being electrically connected to the redundant electrode and the second branch being electrically connected to the first electrode;
electrically connecting the first redundant electrode and the first electrode of the open-circuit first sub-pixel through the first wire comprises:
and melting the electrical connection structure by laser to enable the first branch line and the second branch line to be conducted through the electrical connection structure.
CN202210344713.4A 2022-03-31 2022-03-31 Display panel, repairing method thereof and display device Pending CN114914352A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210344713.4A CN114914352A (en) 2022-03-31 2022-03-31 Display panel, repairing method thereof and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210344713.4A CN114914352A (en) 2022-03-31 2022-03-31 Display panel, repairing method thereof and display device

Publications (1)

Publication Number Publication Date
CN114914352A true CN114914352A (en) 2022-08-16

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Family Applications (1)

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