CN113594325A

CN113594325A - Display panel, manufacturing method thereof and display device

Info

Publication number: CN113594325A
Application number: CN202110837678.5A
Authority: CN
Inventors: 迟霄
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2021-11-02
Anticipated expiration: 2041-07-23
Also published as: CN113594325B

Abstract

The invention discloses a display panel, a manufacturing method thereof and a display device, and relates to the technical field of display, wherein the display panel comprises a plurality of electrode groups arranged on a substrate, and each electrode group comprises at least two electrode units; each electrode unit comprises at least two electrode pairs respectively; the electrode pair comprises two electrodes extending along a first direction and arranged along a second direction; in the same electrode unit, two adjacent electrode pairs share one electrode; a plurality of light emitting devices electrically connected to the electrode pairs; in the same electrode group, the light-emitting devices connected with the electrode pairs in the same electrode unit have the same light-emitting color, and the light-emitting devices connected with the electrode pairs in different electrode units have different light-emitting colors; in the same electrode group, the light-emitting device connected with one electrode pair in one electrode unit does not emit light, and in the other electrode units, two electrodes in at least one electrode pair are electrically connected through a conductor. This is advantageous in reducing or preventing the occurrence of color shift phenomenon.

Description

Display panel, manufacturing method thereof and display device

Technical Field

The invention relates to the technical field of display, in particular to a display panel, a manufacturing method of the display panel and a display device.

Background

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 been developing over decades. The display industry is closely related to our life, and the display technology cannot be separated from the traditional mobile phones, flat panels, televisions and PCs and the current electronic devices such as intelligent wearable devices and VR (virtual reality) and the LED display panel also comes up at the same time.

With the development of display technology, the requirements of users on display quality are higher and higher. In the LED display panel, in the structure in which LEDs are connected in series to form sub-pixels, when an LED connected in series in a certain pixel unit fails and does not emit light, the light emitting efficiency of the corresponding sub-pixel is deteriorated, and further, color shift occurs in the pixel unit, which affects the display effect of the display panel.

Disclosure of Invention

In view of this, the present invention provides a display panel, a method for manufacturing the same, and a display device, which are beneficial to improving a color shift phenomenon caused when a light emitting device connected to a certain electrode pair in an electrode unit does not emit light, so as to improve a display effect.

In a first aspect, the present invention provides a display panel comprising:

a substrate;

a plurality of electrode groups disposed on the substrate, each of the electrode groups including at least two electrode units, respectively; each electrode unit comprises at least two electrode pairs respectively; the electrode pair comprises two electrodes extending along a first direction and arranged along a second direction, and the first direction and the second direction are intersected; in the same electrode unit, two adjacent electrode pairs share one electrode;

a plurality of light emitting devices located on a side of the electrode group away from the substrate, the light emitting devices being electrically connected to the electrode pairs; the electrode pair is connected with at least one light-emitting device;

in the same electrode group, the light emitting devices connected with the electrode pairs in the same electrode unit have the same light emitting color, and the light emitting devices connected with the electrode pairs in different electrode units have different light emitting colors;

in the same electrode group, the light-emitting device connected to one electrode pair in one electrode unit does not emit light, and in the remaining electrode units, two electrodes in at least one electrode pair are electrically connected by a conductor.

In a second aspect, the present invention provides a method for manufacturing a display panel, including:

providing a substrate;

forming a plurality of electrode groups on a substrate, each of the electrode groups including at least two electrode units, respectively; each electrode unit comprises at least two electrode pairs respectively; the electrode pair comprises two electrodes extending along a first direction and arranged along a second direction, and the first direction and the second direction are intersected; in the same electrode unit, two adjacent electrode pairs share one electrode;

binding a light emitting device on each electrode pair;

and detecting the light emitting condition of the light emitting device, and when the light emitting device connected with one electrode pair in one electrode unit in one electrode group is abnormal, electrically connecting two electrodes of at least one electrode pair in other electrode units in the electrode group through a conductor.

In a third aspect, the present invention provides a display device comprising the display panel provided by the present invention.

Compared with the prior art, the display panel, the manufacturing method thereof and the display device provided by the invention at least realize the following beneficial effects:

in the display panel, the manufacturing method thereof and the display device provided by the invention, the display panel comprises a plurality of electrode groups arranged on a substrate, each electrode group comprises at least two electrode units, and each electrode unit comprises at least two electrode pairs. In the same electrode unit, one electrode of two adjacent electrode pairs is shared, that is, three electrodes form two electrode pairs. Two electrodes of the light emitting device are electrically connected to two electrodes of the electrode pair, respectively, and the light emitting device emits light in response to a voltage supplied from the electrode pair connected thereto. The same electrode group at least comprises light emitting devices with two light emitting colors, and the light emitting devices with the same light emitting color are correspondingly connected with the electrode pairs in the same electrode unit. When a certain electrode in the electrode unit does not emit light to the connected light emitting device, the overall light emitting efficiency of the light emitting device corresponding to the electrode unit is reduced, resulting in color shift of the light emitted by the light emitting device corresponding to the electrode group where the electrode unit is located. Therefore, the two electrodes of at least one electrode pair in the rest electrode units in the electrode group are electrically connected through the electric conductors, so that the light-emitting devices connected with the two electrically connected electrodes do not emit light, the difference of the light-emitting efficiency between the light-emitting devices with different colors in the same electrode group is reduced, the color cast phenomenon caused by the larger difference of the light-emitting efficiency of the light-emitting devices with different colors is reduced or avoided, and the overall display effect of the display panel and the display device is improved.

Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic plan view of a display panel according to an embodiment of the invention;

FIG. 2 is an enlarged schematic view of the pixel cell of FIG. 1;

FIG. 3 is a schematic cross-sectional view along AA' of FIG. 2;

FIG. 4 is another enlarged schematic view of the pixel cell of FIG. 1;

FIG. 5 is another enlarged schematic view of the pixel cell of FIG. 1;

FIG. 6 is a schematic cross-sectional view taken along line BB' of FIG. 5;

FIG. 7 is a schematic cross-sectional view taken along line CC' of FIG. 5;

FIG. 8 is a schematic cross-sectional view along line DD' of FIG. 5;

FIG. 9 is another schematic cross-sectional view taken along line DD' of FIG. 5;

FIG. 10 is another schematic cross-sectional view taken along line DD' of FIG. 5;

FIG. 11 is another enlarged schematic view of the pixel cell of FIG. 1;

FIG. 12 is another enlarged schematic view of the pixel cell of FIG. 1;

FIG. 13 is a diagram illustrating a relative position between the light emitting device and the reflective wall;

FIG. 14 is another enlarged schematic view of the pixel cell of FIG. 1;

FIG. 15 is another enlarged schematic view of the pixel cell of FIG. 1;

FIG. 16 is another enlarged schematic view of the pixel cell of FIG. 1;

fig. 17 is a flowchart illustrating a method for manufacturing a display panel according to an embodiment of the invention;

fig. 18 is a schematic plan view of a display device according to an embodiment of the invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention, fig. 2 is an enlarged schematic view of a pixel unit P in fig. 1, fig. 3 is a schematic cross-sectional view along AA' in fig. 2, and with reference to fig. 1 to 3, a display panel 100 according to the present invention includes:

a substrate 00;

a plurality of electrode groups E disposed on the substrate 00, optionally, each pixel unit P correspondingly includes one electrode group E, and each electrode group E includes at least two electrode units E0; each electrode unit E0 includes at least two electrode pairs E00, respectively; the electrode pair E00 includes two electrodes 10 extending in a first direction D1 and arranged in a second direction D2, the first direction D1 and the second direction D2 intersecting; in the same electrode unit E0, two adjacent electrode pairs E00 have one electrode 10 in common;

a plurality of light emitting devices D located on a side of the electrode group E away from the substrate 00, the light emitting devices D being electrically connected to the electrode pairs E00; the electrode pair E00 is connected to at least one light emitting device D;

in the same electrode group E, the light emitting device D connected to the electrode pair E00 in the same electrode unit E0 emits light in the same color, and the light emitting device D connected to the electrode pair E00 in a different electrode unit E0 emits light in a different color;

in the same electrode group E, the light emitting device D connected to one electrode pair E00 in one electrode unit E0 does not emit light, and two electrodes 10 in at least one electrode pair E00 in the remaining electrode units E0 are electrically connected by a conductor T.

It should be noted that fig. 1 only illustrates the display panel 100 with a rectangular structure, but does not limit the shape of the display panel, and in some other embodiments of the present invention, the shape of the display panel 100 may also be embodied as a rounded rectangle, a circle, an ellipse, or another irregular structure including an arc-shaped edge, which is not specifically limited by the present invention. Fig. 1 shows that the display panel 100 includes a plurality of pixel units P, each pixel unit P corresponds to an electrode group E and at least two light emitting devices D of different colors, the light emitting devices D in the pixel units P emit light to form a display screen, fig. 2 can be regarded as an illustration of one pixel unit P in the display panel shown in fig. 1, one pixel unit P includes an electrode group E and at least two groups of light emitting devices, the electrode group E includes at least two electrode units E0, and the two groups of light emitting devices correspond to electrode pairs E00 in different electrode units E0 and are electrically connected. Alternatively, in the pixel unit corresponding to the same electrode group E, the light emitting device D connected to the same electrode unit E0 may be regarded as one sub-pixel in the pixel unit, and when the electrode group E includes two electrode units E0, the pixel unit includes two sub-pixels. It is to be understood that fig. 2 illustrates only the electrode group E and the light emitting device D in one pixel unit P, and does not represent the actual size of each electrode in the electrode group E nor the actual size of the light emitting device D. The relative position relationship of the electrode group E and the light emitting device D in other light emitting areas can be referred to fig. 2. Fig. 3 shows the relative positional relationship of the substrate 00, the electrode 10, the light emitting device D, and the conductor T in the form of a cross-sectional structure, and does not represent actual size and shape. In the present invention, the light emitting devices D electrically connected to different electrode units E0 in the same pixel unit P are filled differently, and only the light emitting devices D electrically connected to different electrode units E0 in the same pixel unit P have different emission colors.

It should be further noted that, in fig. 2, the invention is described by taking an example that only one electrode group E includes two electrode units E0, each electrode unit E0 includes two electrode pairs E00, and each electrode pair E00 is connected to 6 light emitting devices D, in some other embodiments of the invention, one electrode group E may further include three or more electrode units E0, one electrode unit E0 may further include three or more electrode pairs E00, the number of the electrode pairs E00 included in different electrode units E0 of the same electrode group E may be different, and the number of the light emitting devices D connected to different electrode pairs may also be flexibly set according to actual situations, which is not specifically limited by the present invention.

Specifically, with continuing reference to fig. 1 to fig. 3, the display panel provided in the embodiment of the invention includes at least two electrode units E0 in the same electrode group E, the electrode unit E0 includes at least two electrode pairs E00, each electrode pair E00 includes two electrodes 10, and two poles of the light emitting device D are electrically connected to two electrodes 10 in the electrode pair E00 respectively, and emit light in response to the voltage provided by the electrodes 10 in the electrode pair E00. To achieve normal light emission of the light emitting device D, the voltage between the two electrodes 10 in the electrode pair E00 has a certain voltage difference, for example, one of the electrodes is positive, the other electrode can be negative, or the voltages provided by the two electrodes have the same polarity but have a certain voltage difference. The same electrode unit E0 includes at least two electrode pairs E00, and one electrode 10 is common to two adjacent electrode pairs E00, for example, the same electrode unit E0 in fig. 2 includes three electrodes 10 arranged along the second direction D2, the first electrode and the second electrode form one electrode pair E00, and the second electrode and the third electrode form another electrode pair E00. The light emitting device D electrically connected to the electrode pair E00 in the same electrode unit E0 emits light of the same color, and the light emitting device D connected to the different electrode unit E0 in the same electrode group E emits light of a different color.

In the related art, when two electrode pairs are included in one electrode unit, and a light emitting device connected to one electrode pair does not emit light, only a light emitting device connected to the other electrode pair is left, so that the light emitting efficiency of the electrode unit is lowered as a whole. In the electrode group where the electrode units are located, the luminous efficiency of the light-emitting device connected with one electrode unit is reduced, the light-emitting device connected with the other electrode unit normally emits light, the difference of the luminous efficiency of the light-emitting devices connected with the two electrode units is large, and color cast occurs after color mixing of light emitted by the light-emitting devices, so that the display effect is influenced. If the non-luminous light-emitting device is processed in a laser mode, the film structure at the laser point position of the display panel is affected, which may cause the risk of circuit failure in the display panel and affect the performance reliability of the display panel.

In view of this, in the display panel provided by the present invention, in the same electrode group E, the light emitting device D connected to one electrode pair E00 in one electrode unit E0 does not emit light, please refer to fig. 2, the light emitting device D marked with x in the electrode unit E01 does not emit light, in the remaining electrode units E0 in the electrode group E, for example, the electrode unit E02, two electrodes 10 in at least one electrode pair E00 are electrically connected through the electrical conductor T, and when the two electrodes 10 are electrically connected, the electrical potential on the two electrodes 10 is the same, and the light emitting device D connected to the two electrodes 10 will not emit light any more. Therefore, the number of the light emitting devices D connected to the other electrode units E0 in the same electrode group E for emitting light normally is reduced, that is, the light emitting efficiency of the light emitting devices D corresponding to the other electrode units E0 is reduced, and the difference in light emitting efficiency of the light emitting devices D corresponding to the different electrode units E0 in the same electrode group E is reduced, so that the color shift phenomenon caused when some light emitting devices D in the same electrode group E do not emit light is improved or eliminated, and the overall display effect of the display panel is improved.

In addition, the color cast phenomenon can be changed without laser processing, and the damage to the film layer structure and the circuit structure of the display panel in the laser process can be avoided, so that the performance reliability of the display panel can be improved.

Optionally, the light emitting device D mentioned in the present invention is an LED, a Micro LED, a Nano LED, or a Mini LED.

Alternatively, in the same electrode group E, when the light emitting device D in the first column in one electrode unit E0 does not emit light, the light emitting device D corresponding to the electrode pair E00 electrically connected through the conductor T in the remaining electrode units E0 may be the light emitting device D in the first column or the light emitting device D in the second column in the corresponding electrode unit E0, which is not specifically limited by the present invention.

Note that when the light emitting device D connected to the electrode pair E00 in the certain electrode unit E0 does not emit light, the reason for the non-emission may be, for example, that two electrodes in the electrode pair E00 are short-circuited, that one or more light emitting devices D in the light emitting device connected to the electrode pair E00 are short-circuited, that a circuit is broken, or that the light emitting device D itself is damaged.

Alternatively, in the same electrode group E, one electrode 10 in different electrode units E0 is connected to the same signal terminal, for example, in the structure shown in fig. 2, the first electrode in two electrode units E0 is connected to the same signal terminal and receives the same signal, which is beneficial to reducing the number of signal terminals in the display panel.

In an alternative embodiment of the present invention, in the same electrode group E, fig. 4 is another enlarged schematic view of the pixel unit P in fig. 1, and when the light emitting device D connected to the electrode pair E00 does not emit light, the two electrodes in the electrode pair E00 are electrically connected through the electrical conductor T.

Specifically, referring to fig. 4, when the light emitting device D connected to the first electrode pair E00 in the first electrode unit E0 does not emit light, both electrodes of any one electrode pair E00 in the other electrode unit E0 are short-circuited through the conductor T, and the light emitting device D connected to the short-circuited electrode pair E00 does not emit light. Furthermore, the first electrode pair E00 in the first electrode unit E01 is also electrically connected through the conductor T, and the two electrodes 10 in the first electrode pair E00 are shorted, so that on one hand, the short circuit condition of the electrode pair connected to the light emitting device D that does not emit light in the first electrode unit E01 is the same as the short circuit condition of the short circuit electrode pair in the other electrode unit (second electrode unit E02), and on the other hand, the color shift phenomenon caused by the fact that the light emitting device D that does not emit light in the first electrode unit E0 emits light after the short circuit of the partial electrode pair E00 in the other electrode unit E0 is avoided, so as to improve the stability of the display panel in color shift.

It can be understood that, referring to fig. 4, the light emitting devices D connected to the first electrode pair E00 in the first electrode unit E0 do not emit light, which may be caused by an abnormality such as damage or disconnection of the light emitting devices D in the detecting process or a short circuit of the corresponding electrode pair, or may be caused by an abnormality of the light emitting brightness of the light emitting devices D in the detecting process, and the electrodes of the electrode pair E00 connected to the light emitting devices D are actively short-circuited to emit light. That is, in the present invention, the electrode pairs connected to the light emitting device rows are actively short-circuited by the conductive body corresponding to the light emitting device rows in which an abnormality (short circuit, open circuit, damage, or luminance abnormality) occurs.

In an alternative embodiment of the present invention, fig. 5 is another enlarged schematic view of the pixel unit P in fig. 1, fig. 6 is a schematic view of a cross section along BB ' in fig. 5, fig. 7 is a schematic view of a cross section along CC ' in fig. 5, and fig. 8 is a schematic view of a cross section along DD ' in fig. 5. The display panel further comprises a plurality of insulating connectors 20, wherein the insulating connectors 20 are positioned on one side of the electrode group E away from the substrate 00; the two electrodes 10 in each electrode pair E00 are connected by at least one insulating connector 20, and the insulating connector 20 overlaps the two electrodes 10 in the electrode pair E00, respectively, in the thickness direction of the display panel.

Referring to fig. 5 to 8, at the position corresponding to CC ', the electrode pair E00 corresponding to the insulating connector 20 is electrically connected through the conductor T, and at the position corresponding to DD', the electrode pair E00 corresponding to the insulating connector 20 is not electrically connected. The present invention introduces a plurality of insulating connectors 20 on the display panel, and the two electrodes 10 in each electrode pair E00 are connected by at least one insulating connector 20, and fig. 5 only shows the scheme that each electrode pair E00 is connected by one insulating connector 20, and in some other embodiments of the present invention, each electrode pair E00 can also be connected by two or more insulating connectors 20. The insulating connector 20 itself is an insulating material, and when the two electrodes 10 in the electrode pair E00 are connected by only the insulating connector 20, the electrical signals on the two electrodes 10 are not affected, and the two electrodes 10 are not short-circuited. According to the invention, each electrode pair E00 is connected through at least one insulating connector 20, so that when two electrodes 10 in a certain electrode pair E00 need to be short-circuited, a through hole is formed on the corresponding insulating connector 20, and a conductor T is filled in the through hole, so that the two electrodes in the same electrode pair E00 can be electrically connected conveniently. When the electric connection between the two electrodes in the same electrode pair E00 is realized by filling the conductor T in the via hole on the insulating connector 20, the insulating connector 20 plays a role in positioning the conductor T, thereby being beneficial to improving the reliability of the electric connection between the two electrodes 10 in the electrode pair E00.

In an alternative embodiment of the invention, shown in fig. 9 as another schematic cross-sectional view along DD' in fig. 5, at least part of the surface of the insulating connector 20 away from the electrode group E is provided with a groove 30, the groove 30 does not penetrate through the insulating connector 20 in a direction perpendicular to the substrate 00, and the groove 30 overlaps with both electrodes of the corresponding electrode pair E00. The recess 30 does not extend through the insulating connection 20, meaning that the depth h1 of the recess in the direction perpendicular to the substrate 00 is less than the thickness h2 of the portion of the insulating connection 20 that is above the electrode.

Specifically, the present invention provides a groove 30 on a portion of the insulating connection body 20, and the groove 30 does not penetrate through the insulating connection body 20 in a direction perpendicular to the substrate 00. And the orthographic projection of this recess 30 onto the substrate 00 overlaps both electrodes 10 of the corresponding pair of electrodes E00. When it is necessary to short-circuit the two electrodes 10 of a certain electrode pair E00, a via hole may be formed at a position corresponding to the groove 30, and the via hole penetrates the insulating connector 20 at the position of the groove 30 along a direction perpendicular to the substrate 00, so that the via hole exposes the two electrodes of the corresponding electrode pair E00, and when the via hole is filled with the conductor T, the conductor T is electrically connected to the two electrodes 10, respectively. The invention forms the groove 30 on the insulating connector 20 in advance, when the two electrodes in the electrode pair E00 need to be electrically connected to form the via hole on the insulating connector 20, the arrangement of the groove 30 simplifies the difficulty of forming the via hole on the insulating connector 20, thereby facilitating the simplification of the manufacturing difficulty of the display panel.

When it is determined that it is necessary to electrically connect the two electrodes 10 in a certain electrode pair E00 and form a via hole in the insulating connecting member, the via hole is formed only in the insulating connecting member 20 corresponding to the electrode pair E00 that needs to be electrically connected, and the via hole is not formed in the insulating connecting member 20 corresponding to the other electrode pair E00 that does not need to be electrically connected.

In an alternative embodiment of the present invention, fig. 10 is another schematic cross-sectional view along DD' in fig. 5, at least a portion of the insulating connector 20 includes a via 40, the via 40 penetrates the insulating connector 20 along a direction perpendicular to the substrate 00, and two electrodes 10 in the electrode pair E00 corresponding to the insulating connector 20 are exposed.

Specifically, the electrode pair E00 corresponding to the DD' position in fig. 5 is not electrically connected by the conductor T, and the via hole 40 on the insulating connector 20 is not filled with a conductor. In the present invention, the via hole 40 is formed on the insulating connector 20, the via hole 40 exposes two electrodes in the electrode pair E00 corresponding to the insulating connector 20, and when two electrodes in a certain electrode pair E00 need to be electrically connected through a conductor, the conductor T is directly filled in the insulating connector 20 corresponding to the electrode pair E00 that needs to be electrically connected, for example, please refer to fig. 7. That is, when it is necessary to short-circuit the electrodes in the partial electrode pair E00, the insulating connecting body 20 is provided with the via hole 40, so that the step of forming the via hole 40 on the insulating connecting body 20 is omitted, and the process of short-circuiting the two electrodes 10 in the electrode pair E00 by the conductor T is simplified.

In an alternative embodiment of the present invention, referring to fig. 7, a conductive body T fills the via 40. When the conductive body T fills the via hole 40, the conductive body T electrically connects two electrodes in the corresponding electrode pair E00, so that the light emitting device connected to the electrode pair E00 does not emit light, and in the same electrode group E, at least one light emitting device corresponding to the electrode pair E00 in each electrode unit E0 does not emit light, thereby reducing the difference in light emitting efficiency of the light emitting devices connected to different electrode units E0, and facilitating improvement of the color shift phenomenon caused by the non-light emission of part of the electrode pairs E00 in the same electrode group E. In addition, the conductive body T is filled in the via hole 40 on the insulating connector 20, and the via hole 40 is equivalent to limiting the conductive body T, which is beneficial to realizing accurate electrical connection of two electrodes in the electrode pair E00 and improving the reliability of electrical connection.

In an alternative embodiment of the present invention, referring to fig. 5, for the insulating connector 20 and the light emitting device D connected to the same electrode pair E00, the light emitting device D is located on the same side of the insulating connector 20 along the first direction D1. Specifically, the light emitting device D is disposed on the same side of the insulating connector 20, specifically, the insulating connector 20 is disposed at least one end of the electrode pair E00 along the first direction D1, and the light emitting device D is disposed between two ends of the electrode pair E00 along the first direction D1, so that the insulating connector 20 is prevented from being inserted between the light emitting devices D connected to the same electrode pair E00, and the problem that the introduction of the insulating connector 20 affects the aperture ratio of the display panel is avoided. Meanwhile, the light emitting devices D are not disposed at both ends of the electrode pair E00 along the first direction D1, so that there is enough space for disposing the insulating connector 20, and thus, when a via hole is formed on the insulating connector 20, it is advantageous to ensure the size of the via hole, thereby ensuring that reliable electrical connection between the two electrodes 10 in the electrode pair E00 can be achieved when the conductor T is filled in the via hole.

In an alternative embodiment of the present invention, referring to fig. 5, the electrode pair E00 includes a first end 11 and a second end 12 arranged along the first direction D1, and in the same electrode unit E0, two insulating connectors 20 adjacent to each other along the second direction D2 are respectively located at the first end 11 and the second end 12 of two adjacent electrode pairs E00.

Specifically, fig. 5 shows that in the same electrode unit E0, two insulating connectors 20 adjacent to each other along the second direction D2 are alternately arranged at the first end 11 and the second end 12 of the electrode pair E00, that is, when two electrode pairs E00 are included in the electrode unit E0, the insulating connector 20 corresponding to the first electrode pair E00 is located at the first end 11 of the first electrode pair E00, the insulating connector 20 corresponding to the second electrode pair E00 is located at the second end 12 of the second electrode pair E00, and the two adjacent insulating connectors 20 are arranged in a staggered manner, so that the space in the electrode unit E0 is effectively utilized, and the defect that the space is crowded and the complexity of the manufacturing process is increased due to the occurrence of space is avoided.

Of course, the space between two adjacent electrode pairs E00 in the electrode unit E0 is sufficient, and an insulating connecting body 20 may be disposed at both the first end 11 and the second end 12 of the electrode pair E00, for example, referring to fig. 11, fig. 11 shows another enlarged schematic view of the pixel unit P in fig. 1, each electrode pair E00 is connected to two insulating connecting bodies 20, the insulating connecting bodies 20 connected to the same electrode pair E00 are respectively located at the first end 11 and the second end 12 of the electrode pair E00, when a certain electrode pair E00 needs to be connected through a conductive body T, a via hole 40 may be formed on both insulating connecting bodies 20 connected to the electrode pair E00, the conductive body T is filled in both via holes 40, and the two conductive bodies T are used to electrically connect two electrodes in the electrode pair E00, so as to improve the reliability of electrical connection between the two electrodes.

In an alternative embodiment of the present invention, fig. 12 is another enlarged schematic view of the pixel unit P in fig. 1, the display panel further includes a reflective wall 50, in the same electrode group E, the reflective wall 50 is at least located between the light emitting devices D connected to two adjacent electrode units E0, and the reflective wall 50 at least partially surrounds the light emitting devices D connected to the electrode unit E0; the insulating connector 20 multiplexes the reflective wall 50.

In the invention, the light emitting color of the light emitting device D connected with the same electrode unit E0 is the same, the light emitting color of the light emitting device D connected with different electrode units E0 in the same electrode group E is different, in order to avoid the phenomenon of color mixing of the light emitting device D connected with two adjacent electrode units E0, the invention introduces the reflecting retaining wall 50 between the light emitting devices D connected with two adjacent electrode units E0, alternatively, the reflective wall 50 is disposed corresponding to the electrode unit E0 and surrounds the light emitting device D connected to the electrode unit E0, the light emitted by the light emitting device D with large angle is reflected multiple times when it is emitted to the reflective wall 50, and finally emitted toward the light emitting surface of the display panel, therefore, the phenomenon of color mixing caused by the fact that large-angle light rays irradiate the position of the light-emitting device D connected with the adjacent electrode unit E0 is avoided, and the display effect of the display panel is improved.

In an alternative embodiment of the present invention, fig. 13 is a diagram illustrating a relative position relationship between the light emitting device D and the reflective wall 50, and the display panel further includes a package body F covering the light emitting device D and the reflective wall 50 along a direction perpendicular to the substrate 00. The packaging body F is equivalent to cladding the light-emitting device D, plays a role in sealing the light-emitting device D, and avoids the influence on the performance of the light-emitting chip caused by the fact that external moisture enters the light-emitting chip in the light-emitting device D. The light emitted from the light emitting device D is emitted through the package body F. Optionally, the refractive index of the reflective wall 50 is greater than the refractive index of the package body F contacting the reflective wall 50 and located on one side of the reflective wall 50 close to the light emitting device D, so that when the light emitted from the light emitting device D is emitted to the reflective wall 50 through the package body F, the light is totally reflected at the interface of the reflective wall 50, thereby facilitating to improve the effective utilization rate of the light emitted from the light emitting device D.

In an alternative embodiment of the present invention, referring to fig. 5, each electrode group E includes a first electrode unit E01 and a second electrode unit E02, and the number of electrode pairs E00 included in the first electrode unit E01 and the second electrode unit E02 is the same; the light emitting devices D connected to the n electrode pairs E00 in the first electrode unit E01 do not emit light, and the n electrode pairs E00 in the second electrode unit E02 are electrically connected through a conductor T, wherein n is an integer and n is not less than 1.

Specifically, in the case where the number of electrode pairs E00 included in different electrode units E0 in the same electrode group E is the same, when the light-emitting devices D connected to n electrode pairs E00 in the first electrode unit E01 do not emit light, n electrode pairs E00 in the second electrode unit E02 are electrically connected by the conductor T, so that the light-emitting devices D connected to n electrode pairs E00 in the second electrode unit E02 also do not emit light. In this way, the difference in light emitting efficiency between the light emitting devices D connected to different electrode units E0 in the same electrode group E is reduced, and color shift caused by a large difference in light emitting efficiency between the light emitting devices D corresponding to different electrode units E0 is avoided.

Of course, fig. 5 only illustrates that the same electrode group E includes two electrode units E0, in some other embodiments of the present invention, the number of the electrode units E0 included in the same electrode group E may also be 3 or 4, and when the number of the electrode units E0 is 3, the light emitting colors of the light emitting devices D connected to different electrode units E0 may be represented as three colors of red, green and blue, respectively; when the number of the electrode units E0 is 4, the light emitting colors of the light emitting devices D connected to different electrode units E0 can be represented as red, green, blue and white, respectively, for example, referring to fig. 14, fig. 14 is another enlarged schematic diagram of the pixel unit P in fig. 1, this embodiment shows that the electrode group E includes three electrode units E0, each electrode unit E0 includes two electrode pairs E00, and the three electrode units are E01, E02, and E03, respectively. When the number of the electrode units E0 included in the same electrode group E is 3 or 4 and the number of the electrode pairs E00 included in each electrode unit E0 is the same, when the light-emitting device D connected to the n electrode pairs E00 in a certain electrode unit E0 does not emit light, the n electrode pairs E00 in the remaining electrode units E0 are electrically connected through the conductor T, thereby preventing color shift.

In an alternative embodiment of the present invention, fig. 15 is another enlarged schematic view of the pixel unit P in fig. 1, and this embodiment shows a scheme in which the electrode group E includes two electrode units E0, wherein the first electrode unit E01 includes four electrode pairs E00, and the second electrode unit E02 includes two electrode pairs E00. Each electrode group E comprises a first electrode unit E01 and a second electrode unit E02, and the number of electrode pairs E00 included in the first electrode unit E01 and the second electrode unit E02 is X1 and X2, wherein X1 is m X2, m is an integer, and m is greater than or equal to 2; in fig. 15, X1 is 4, and X2 is 2.

When the light emitting device D corresponding to the electrode pair E00 in any one of the first electrode unit E01 and the second electrode unit E02 does not emit light, the number of the electrode pairs E00 corresponding to the light emitting devices D emitting light in the light emitting device D corresponding to the first electrode unit E01 is S1 after two electrodes in a partial electrode pair E00 are electrically connected by the conductor T; the number of the electrode pairs E00 corresponding to the light emitting devices D emitting light in the light emitting devices D corresponding to the second electrode unit E02 is S2, respectively, where S1 > S2.

Specifically, referring to fig. 15, in the same electrode group E, the number of the electrode pairs E00 included in the first electrode unit E01 and the second electrode unit E02 is different, and the number of the electrode pairs E00 included in the first electrode unit E01 is m times the number of the electrode pairs E00 included in the second electrode unit E02, where m is 2 in fig. 15. The greater number of the electrode pairs E00 corresponding to the first electrode unit E01 is particularly suitable for the case where the light-emitting device D connected to the electrode pair E00 in the first electrode unit E01 has a lower light-emitting efficiency than the light-emitting device D connected to the electrode pair E00 in the second electrode unit E02. For example, the light emitting efficiency of the individual light emitting device D whose light emission color is red is smaller than that of the individual light emitting device D whose light emission color is green. In order to balance the light emitting efficiencies of the light emitting devices D of different light emitting colors in the same electrode group E, the number of light emitting devices D having smaller light emitting efficiencies can be increased.

With respect to the scheme shown in fig. 15, when one electrode pair E00 of the first electrode unit E01 does not emit light, one electrode pair E00 of the remaining electrode pairs E00 of the first electrode unit E01 is electrically connected through the conductor T, and one electrode pair E00 of the second electrode unit E02 is electrically connected through the conductor T, so that the light emitting devices D connected to two electrode pairs E00 of the first electrode unit E01 do not emit light, the light emitting devices D connected to two electrode pairs E00 emit light, the light emitting devices D connected to one electrode pair E00 of the second electrode unit E02 do not emit light, the light emitting devices D connected to one electrode pair E00 emit light, that is, the number of electrode pairs E00 connected to the light emitting devices D that normally emit light in the first electrode unit E01 is greater than the number of electrode pairs E00 connected to the light emitting devices D that normally emit light in the second electrode unit E02, while improving color shift caused by the non-emission of part of the light emitting devices D, it is also possible to ensure that the number of light emitting devices D having lower emission efficiency connected to the first electrode unit E01 is greater than the number of light emitting devices D having higher emission efficiency connected to the second electrode unit E02, to further improve the color shift phenomenon.

Similarly, when one electrode pair E00 of the second electrode unit E02 is connected to the light emitting device D, the two electrode pairs E00 of the first electrode unit E01 are electrically connected to each other through the electrical conductor T, so that the number of electrode pairs E00 connected to the light emitting device D that normally emits light in the first electrode unit E01 is greater than the number of electrode pairs E00 connected to the light emitting device D that normally emits light in the second electrode unit E02.

In an alternative embodiment of the invention, S1: S2 ═ X1: X2. That is, when some light emitting devices D do not emit light in the same electrode group E, after some electrode pairs E00 are electrically connected through the conductor T, the ratio of the number of electrode pairs E00 connected to the light emitting devices D that normally emit light in the first electrode unit E01 to the number of electrode pairs E00 connected to the light emitting devices D that normally emit light in the second electrode unit E02 is set to be the same as the ratio of the total number of electrode pairs E00 included in the first electrode unit E01 to the total number of electrode pairs E00 included in the second electrode unit E02, so that, in the same electrode group E, even if some electrode pairs E00 are short-circuited through the conductor T, the number of light emitting devices D having low light emitting efficiency is still greater than the number of light emitting devices D having high light emitting efficiency, which is more favorable for improving the color shift phenomenon and enhancing the display effect.

It should be noted that fig. 15 only illustrates that the same electrode group E includes two electrode units E0, in some other embodiments of the present invention, the same electrode group E may further include 3 or 4 electrode units E0, for example, please refer to fig. 16, fig. 16 is another enlarged schematic diagram of the pixel unit P in fig. 1, the electrode group E includes a third electrode unit E03 in addition to the first electrode unit E01 and the second electrode unit E02, and the number of the electrode pairs E00 included in the third electrode unit E03 is the same as the number of the electrode pairs E00 included in the second electrode unit E02. Alternatively, the light emitting device D connected to the electrode pair E00 in the first electrode unit E01 has a light emission color of red, and the light emitting devices D connected to the second and third electrode units E02 and E03 have light emission colors of green and blue, respectively. Assume that the ratio of the number of electrode pairs E00 included in the first electrode unit E01, the second electrode unit E02, and the third electrode unit E03 is X1: x2: x2, shown as 2:1:1 in fig. 16, when the light emitting device D connected to a certain electrode pair E00 does not emit light, and a part of the electrode pairs E00 in the remaining electrode units E0 are connected by the conductor T, the ratio of the number of the electrode pairs E00 connected to the light emitting device D that normally emits light in the first electrode unit E01, the second electrode unit E02, and the third electrode unit E03 is also shown as X1: x2: and X2 to effectively improve the color cast on the display panel.

It should be noted that, in the above embodiment, only the light-emitting device D connected to the electrode pair E00 in a certain electrode unit E0 does not emit light, and the light-emitting devices D connected to the remaining electrode pairs E00 in the electrode unit E0 emit light normally are described as an example. In other embodiments of the present invention, there may be a case where none of the light emitting devices D connected to all of the electrode pairs E00 in one electrode unit E0 in a certain electrode group E emits light, in which case, the electrode pairs E00 in the remaining electrode units E0 in the electrode group E are electrically connected through the electrical conductor T, which is equivalent to discarding each light emitting device D in the electrode group E, so as to avoid a large color shift of the display panel.

Based on the same inventive concept, the present invention further provides a manufacturing method of a display panel, fig. 17 is a flowchart of the manufacturing method of the display panel according to the embodiment of the present invention, please refer to fig. 1 to 3, and the manufacturing method includes:

step 101, providing a substrate 00;

102, forming a plurality of electrode groups E on a substrate 00, wherein each electrode group E comprises at least two electrode units E0; each electrode unit E0 includes at least two electrode pairs E00, respectively; the electrode pair E00 includes two electrodes extending in a first direction D1 and aligned in a second direction D2, the first direction D1 and the second direction D2 intersecting; in the same electrode unit E0, two adjacent electrode pairs E00 have one electrode in common;

step 103, binding a light-emitting device D on each electrode pair E00;

and 104, detecting the light emitting condition of the light emitting device D, and when the light emitting device D connected with one electrode pair E00 in one electrode unit E0 in one electrode group E is abnormal, electrically connecting two electrodes of at least one electrode pair E00 in other electrode units E0 in the electrode group E through the conductor T. Alternatively, the occurrence of an abnormality in the light emitting device refers to that the light emitting device does not emit light or that the light emission luminance is lower than the normal light emission luminance, or the like.

Specifically, in the manufacturing method of the display panel provided by the present invention, the electrode group E is formed on the substrate 00, and the light emitting device D is bound to the electrode pair E00 corresponding to the electrode group E, or alternatively, the light emitting device D may be bound to the electrode pair E00 by using a bulk transfer method. After the light emitting devices D are bound, whether the light emitting devices D connected to the electrode pairs E00 in each electrode group E emit light normally is determined by detecting the light emitting conditions of the light emitting devices D. When one electrode pair E00 connected to one electrode unit E0 in one electrode group E does not emit light, the light emitting efficiency of the light emitting device D corresponding to the electrode unit E0 is reduced; therefore, in the electrode group E, the two electrodes of at least one electrode pair E00 in the other electrode units E0 are electrically connected, so that the light emitting device D connected to the electrode pair E00 does not emit light, and the difference in light emitting efficiency between the light emitting devices D connected to different electrode units E0 in the same electrode group E is effectively reduced, thereby being beneficial to improving color shift caused when the light emitting device D connected to a certain electrode pair E00 does not emit light, and being beneficial to improving the display effect of the display panel.

When it is detected that the light emitting device D connected to one electrode pair E00 in one electrode unit E0 has a lower luminance than the normal luminance, the two electrodes corresponding to the electrode pair E00 may be short-circuited by the conductor, so that the light emitting device D corresponding to the electrode pair E00 does not emit light.

In an alternative embodiment of the present invention, referring to fig. 5 to fig. 8, before the light emitting device D is bound on each electrode pair E00, that is, before the step 103, the method further includes:

a plurality of insulating connectors 20 are formed on the side of the electrode group E away from the substrate 00, two electrodes in each electrode pair E00 are connected by at least one insulating connector 20, and the orthogonal projection of the insulating connector 20 to the light-emitting surface of the display panel overlaps with two electrodes in the electrode pair E00 respectively.

The insulating connector 20 itself is an insulating material, and may be embodied as an organic material, for example, and when the insulating connector 20 is used only to connect the two electrodes in the electrode pair E00, the electrical signals on the two electrodes are not affected and the two electrodes are not shorted. According to the invention, each electrode pair E00 is connected through at least one insulating connector 20, so that when two electrodes in a certain electrode pair E00 need to be short-circuited, a through hole 40 is formed on the corresponding insulating connector 20, and a conductor T is filled in the through hole 40, so that the two electrodes in the same electrode pair E00 can be electrically connected conveniently. The via hole 40 on the insulating connector 20 realizes the electrical connection between two electrodes in the same electrode pair E00, and the insulating connector 20 plays a role in positioning the electrical conductor T, thereby being beneficial to improving the reliability of the electrical connection between two electrodes in the electrode pair E00.

In an alternative embodiment of the present invention, referring to fig. 5 and fig. 7, in step 104, at least one electrode in the other electrode unit E0 in the electrode group E is electrically connected to two electrodes of the electrode group E00 through the electrical conductor T, specifically:

in the electrode group E, a via hole 40 is formed on the insulating connector 20 to which at least one electrode pair E00 in the other electrode unit E0 is connected, both electrodes in the electrode pair E00 are exposed, and a conductor T is filled in the via hole 40.

It is understood that, in this embodiment, the via holes 40 are not provided on the respective insulating connection bodies 20 before the light emission of the light emitting device D is detected. When it is necessary to connect the electrodes in some electrode pairs E00 through the conductor T, then the via hole 40 is formed on the insulating connector 20 corresponding to these electrode pairs E00, since the two electrodes in the electrode pair E00 are exposed by the via hole 40, when the conductor T is filled in the via hole 40, the conductor T will be able to contact both the electrodes in the electrode pair E00, which is equivalent to short-circuiting both the electrodes in the electrode pair E00, and the light emitting device D bound on the electrode pair E00 will no longer emit light. When the electrodes in the electrode pair E00 need to be shorted, the via hole 40 is formed on the insulating connector 20, which is beneficial to simplifying the overall manufacturing process of the display panel. The conductor T in the present invention may be a material having a conductive property, such as a conductive paste or a conductive silver paste.

In an alternative embodiment of the present invention, referring to fig. 8, 9 and 10, after the plurality of insulating connectors 20 are fabricated on the side of the electrode group E away from the substrate 00 and before the light emitting device D is bonded, the method further includes:

forming a groove 30 on a side of each insulating connector 20 away from the substrate 00, wherein, in a direction perpendicular to the substrate 00, a depth h1 of the groove 30 is smaller than a thickness h2 of the insulating connector 20, and the groove 30 overlaps with both electrodes 10 in the corresponding electrode pair E00;

the method for forming the via hole 40 on the insulating connector 20 comprises the following steps: and forming a via hole 40 at a position corresponding to the groove 30 by using an ashing or etching method.

Specifically, the manufacturing method provided by the embodiment of the invention further includes a step of forming a groove 30 on each insulating connector 20 after the plurality of insulating connectors 20 are manufactured on the side of the electrode group E away from the substrate 00 and before the light emitting device D is bonded. That is, before the light emitting devices D are bonded, each insulating connection body 20 is provided with a groove 30, the groove 30 does not penetrate the insulating connection body 20, and in a direction perpendicular to the substrate 00, a forward projection of the groove 30 to the substrate 00 overlaps with forward projections of both electrodes of the corresponding electrode pair E00 to the substrate 00. When it is necessary to short-circuit the two electrodes of a certain electrode pair E00, a via hole 40 may be formed at the position corresponding to the groove 30, and the method for forming the via hole 40 may be, for example, ashing or etching, and the via hole 40 penetrates the insulating connector 20 at the position of the groove 30 along the direction perpendicular to the substrate 00, so that the via hole 40 will expose the two electrodes of the corresponding electrode pair E00, and at this time, when the via hole 40 is filled with the conductor T, the conductor T will be electrically connected to the two electrodes, respectively. The invention forms the groove 30 on the insulating connector 20 in advance, when the two electrodes in the electrode pair E00 need to be electrically connected to form the via hole 40 on the insulating connector 20, the arrangement of the groove 30 simplifies the difficulty of forming the via hole 40 on the insulating connector 20, thereby facilitating the simplification of the manufacturing difficulty of the display panel.

Of course, in some other embodiments of the present invention, before the light emitting device D is bonded, a via hole 40 may be further formed on each insulating connector 20, the via hole 40 penetrates through the insulating connector 20 in a direction perpendicular to the substrate 00, and two electrodes of the electrode pair E00 corresponding to the insulating connector 20 are exposed. When both electrodes of a certain electrode pair E00 need to be electrically connected by the conductor T, the conductor T may be directly filled in the insulating connector 20 corresponding to the electrode pair E00 that needs to be electrically connected. That is, when it is necessary to short-circuit the electrodes in the partial electrode pair E00, the insulating connecting body 20 is already provided with the via hole 40, so that the step of forming the via hole 40 on the insulating connecting body 20 is omitted, and the process of short-circuiting the two electrodes in the electrode pair E00 by the conductor T is simplified.

Based on the same inventive concept, the present invention further provides a display device, and fig. 18 is a schematic plan view of the display device according to the embodiment of the present invention, where the display device includes the display panel according to any one of the embodiments of the present invention. The embodiment shown in fig. 18 is only described with reference to a mobile phone as an example of the display device, and it should be understood that the display device 200 provided in the embodiment of the present invention may be a computer, a television, a vehicle-mounted display device, a wearable display device, or other display devices with a display function, and the present invention is not limited thereto. The display device 200 provided in the embodiment of the present invention has the beneficial effects of the display panel 100 provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel 100 in the foregoing embodiments, and the detailed description of the embodiment is not repeated herein.

In summary, the display panel, the manufacturing method thereof and the display device provided by the invention at least achieve the following beneficial effects:

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A display panel, comprising:

a substrate;

2. The display panel according to claim 1, wherein the light-emitting device to which one of the electrode pairs in one of the electrode units is connected does not emit light, and both electrodes in the electrode pair are electrically connected by a conductor.

3. The display panel according to claim 1, further comprising a plurality of insulating connectors on a side of the electrode group away from the substrate; the two electrodes in each electrode pair are connected through at least one insulating connector, and the insulating connectors and the two electrodes in the electrode pairs are respectively overlapped along the thickness direction of the display panel.

4. The display panel according to claim 3, wherein at least a portion of the surface of the insulating connector facing away from the electrode group is provided with a groove, the groove does not penetrate through the insulating connector in a direction perpendicular to the substrate, and the groove overlaps with both electrodes in the corresponding electrode pair.

5. The display panel according to claim 3, wherein at least a portion of the insulating connectors include vias extending through the insulating connectors in a direction perpendicular to the substrate, and exposing both electrodes of the electrode pair corresponding to the insulating connectors.

6. The display panel of claim 5, wherein the conductive body fills the via.

7. The display panel according to claim 3, wherein, for the insulating connection body and the light emitting device which connect the same electrode pair, the light emitting device is located on the same side of the insulating connection body in the first direction.

8. The display panel according to claim 3, wherein the electrode pairs include first ends and second ends arranged along the first direction, and two insulating connectors adjacent to each other along the second direction in the same electrode unit are respectively located at the first ends and the second ends of two adjacent electrode pairs.

9. The display panel according to claim 3, further comprising a reflective wall, wherein in the same electrode group, the reflective wall is at least located between the light emitting devices connected to two adjacent electrode units, and the reflective wall at least partially surrounds the light emitting devices connected to the electrode units;

the insulating connector is used for multiplexing the reflection retaining wall.

10. The display panel according to claim 1, wherein each of the electrode groups includes a first electrode unit and a second electrode unit, and the first electrode unit and the second electrode unit include the same number of electrode pairs;

the light emitting devices connected with n electrode pairs in the first electrode unit do not emit light, and the n electrode pairs in the second electrode unit are electrically connected through the electric conductor, wherein n is an integer and is not less than 1.

11. The display panel according to claim 1, wherein each of the electrode groups includes a first electrode unit and a second electrode unit, and the number of electrode pairs included in the first electrode unit and the second electrode unit is X1 and X2, respectively, where X1 is m X2, m is an integer and m ≧ 2;

when the light emitting device corresponding to any one of the first electrode unit and the second electrode unit does not emit light, the number of the electrode pairs corresponding to the light emitting devices that emit light in the light emitting device corresponding to the first electrode unit is S1 after both electrodes of the partial electrode pairs are electrically connected by the electrical conductor; in the light emitting devices corresponding to the second electrode unit, the number of the electrode pairs corresponding to the light emitting devices emitting light is S2, wherein S1 > S2.

12. The display panel of claim 11, wherein S1: S2 ═ X1: X2.

13. A method for manufacturing a display panel is characterized by comprising the following steps:

providing a substrate;

binding a light emitting device on each electrode pair;

14. The method of claim 13, further comprising, before bonding the light emitting device to each electrode pair:

and manufacturing a plurality of insulating connectors on one side of the electrode group, which is far away from the substrate, wherein two electrodes in each electrode pair are connected through at least one insulating connector, and the orthographic projection of the insulating connectors to the light emergent surface of the display panel is respectively overlapped with the two electrodes in the electrode pair.

15. The method according to claim 14, wherein two electrodes of at least one electrode pair in the other electrode units in the electrode group are electrically connected by a conductor, specifically:

in the electrode group, a via hole is formed on an insulating connector connected to at least one electrode pair in other electrode units, two electrodes in the electrode pair are exposed, and a conductor is filled in the via hole.

16. The method of claim 15, further comprising, after forming a plurality of insulating connectors on a side of the electrode assembly away from the substrate and before bonding the light emitting device, the steps of:

forming a groove on one side of each insulating connector far away from the substrate, wherein the depth of the groove is smaller than the thickness of the insulating connector along the direction perpendicular to the substrate, and the groove is overlapped with two electrodes in the corresponding electrode pair;

the method for forming the via hole on the insulating connector comprises the following steps: and forming a via hole at the position corresponding to the groove by adopting an ashing or etching method.

17. A display device characterized by comprising the display panel according to any one of claims 1 to 12.