Display panel and method for manufacturing the same

Abstract

An embodiment of the present application discloses a display panel and a preparation method thereof. The display panel includes a strip-shaped barrier wall located in a non-display area and a calibration unit group located on the strip-shaped barrier wall. During inkjet printing, printing is first performed in the non-display area, that is, ink droplets are dropped on the strip-shaped barrier wall to form a calibration unit group. The calibration unit group includes a plurality of printing calibration units. By analyzing the positions of the respective printing calibration units in the calibration unit group, the ink ejection time of the inkjet print head is adjusted. Then, when inkjet printing is performed in the display area, the ink droplets are dropped into the first sub-pixel openings, and it is avoided that the ink droplets fall into adjacent first sub-pixel openings, thereby improving the accuracy of inkjet printing, avoiding color mixing, and achieving a better display effect.

Description

Technical Field

[0001] The present application relates to the field of displays, and particularly to a display panel and a method for manufacturing the display panel. Background Art

[0002] With the development of organic light-emitting diode (OLED) display technology, processes for manufacturing OLED display panels, such as ink jet printing, have received extensive attention.

[0003] Currently, functional film layers such as a hole injection layer, a hole transport layer, and a light-emitting material can all adopt the ink jet printing process. However, during the ink jet printing process, due to the differences in the ejection speed and ejection time of ink droplets, it is easy to cause an offset error in the droplet landing position, deviating from the ideal landing position, resulting in the ink droplets landing outside the pixel pits or even in adjacent pixel pits, causing color mixing and affecting the display effect of the display panel. Summary of the Invention

[0004] Embodiments of the present application provide a display panel and a method for manufacturing the display panel to solve the problem of color mixing caused by the deviation of the ink droplet landing position in the ink jet printing method.

[0005] Embodiments of the present application provide a display panel, where the display panel includes a display area and a non-display area adjacent to the display area;

[0006] A substrate;

[0007] A pixel defining layer disposed on the substrate, including a plurality of first sub-pixel openings in the display area and at least one strip-shaped barrier in the non-display area, the strip-shaped barrier extending in a first direction, the first direction being parallel to the side of the display area close to the strip-shaped barrier;

[0008] A light-emitting functional layer, including a plurality of first sub-pixels in the display area and at least one correction unit group in the non-display area, one of the first sub-pixels being disposed in one of the first sub-pixel openings, and one of the correction unit groups being disposed on one of the strip-shaped barriers and including a plurality of printing correction units arranged in sequence from one end of the strip-shaped barrier to the other end of the strip-shaped barrier.

[0009] In the display panel provided by the embodiments of the present application, a strip-shaped groove is provided between any two adjacent strip-shaped barriers on the same side of the non-display area, and the light-emitting functional layer includes a filling sub-layer in the strip-shaped groove.

[0010] In the display panel provided by the embodiment of the present application, a plurality of the first sub-pixels include a plurality of sub-pixel groups arranged along a second direction, and a sub-pixel group includes a plurality of the first sub-pixels arranged along the first direction. The second direction is perpendicular to the first direction. In the second direction, a plurality of printing correction units in a correction unit group correspond to a plurality of the first sub-pixels in a sub-pixel group one by one.

[0011] In the display panel provided by the embodiment of the present application, the first sub-pixel includes a plurality of functional sub-layers arranged in a stacked manner;

[0012] The number of the strip-shaped barriers is greater than or equal to the number of the functional sub-layers. The pixel defining layer includes a plurality of correction unit groups corresponding to the functional sub-layers one by one. The material of a functional sub-layer is the same as the materials of the printing correction units in the corresponding correction unit group.

[0013] In the display panel provided by the embodiment of the present application, the display panel further includes an anode layer disposed between the substrate and the pixel defining layer. The anode layer includes a plurality of first electrodes located in the display area and at least one reflective electrode located in the non-display area;

[0014] One of the first electrodes corresponds to an opening of a first sub-pixel. One of the reflective electrodes corresponds to a correction unit group and is located on a side of the strip-shaped barrier away from the correction unit group.

[0015] In the display panel provided by the embodiment of the present application, in the second direction, the width of the reflective electrode is greater than or equal to 1 / 3 of the width of the strip-shaped barrier and less than the width of the strip-shaped barrier.

[0016] In the display panel provided by the embodiment of the present application, the pixel defining layer includes a plurality of second sub-pixel openings located between the display area and the strip-shaped barrier. The light-emitting functional layer includes a plurality of second sub-pixels located in the non-display area. One of the second sub-pixels is disposed in one of the second sub-pixel openings;

[0017] The anode layer includes a plurality of second electrodes. One of the second electrodes corresponds to one of the second sub-pixel openings and is located between the second sub-pixel and the substrate.

[0018] In the display panel provided by the embodiment of the present application, the materials of the second sub-pixels and the filling sub-layers are the same as the material of the first sub-pixels.

[0019] In the display panel provided by the embodiment of the present application, a side of the strip-shaped barrier close to the correction unit group has a hydrophobic surface.

[0020] An embodiment of the present application provides a method for manufacturing a display panel, which is characterized by including the following steps:

[0021] Provide a substrate, and the display panel includes a display area and a non-display area;

[0022] Form a pixel defining layer on the substrate. The pixel defining layer includes a plurality of first sub-pixel openings formed in the display area and at least one strip-shaped barrier wall formed in the non-display area. The strip-shaped barrier wall extends in a first direction, and the first direction is parallel to the side of the display area close to the strip-shaped barrier wall;

[0023] Form a light-emitting functional layer on the substrate and the pixel defining layer. The light-emitting functional layer includes a plurality of first sub-pixels formed in the display area and at least one calibration unit group formed in the non-display area. One of the first sub-pixels is disposed in one of the first sub-pixel openings, and one of the calibration unit groups is disposed on one of the strip-shaped barrier walls and includes a plurality of printing calibration units arranged in sequence from one end of the strip-shaped barrier wall to the other end of the strip-shaped barrier wall.

[0024] The beneficial effects are as follows: In the embodiment of the present application, a strip-shaped barrier wall is provided in the non-display area and a calibration unit group is provided on the strip-shaped barrier wall. During inkjet printing, printing is first performed in the non-display area, that is, ink droplets are dropped on the strip-shaped barrier wall to form a calibration unit group. The calibration unit group includes a plurality of printing calibration units. By analyzing the positions of the respective printing calibration units in the calibration unit group, the ink ejection time of the inkjet print head is adjusted. Then, when inkjet printing is performed in the display area, the ink droplets are dropped into the first sub-pixel openings to avoid the ink droplets falling into adjacent first sub-pixel openings, improving the accuracy of inkjet printing, avoiding color mixing, and achieving a better display effect. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is the first top view structural schematic diagram of the display panel provided by the embodiment of the present application;

[0027] Figure 2 It is Figure 1 The cross-sectional structural schematic diagram at the C-C position in

[0028] Figure 3 It is the second top view structural schematic diagram of the display panel provided by the embodiment of the present application;

[0029] Figure 4 is Figure 3 a schematic cross-sectional structure diagram of the D-D position in

[0030] Figure 5 the third top-view structure diagram of the display panel provided by the embodiment of the present application;

[0031] Figure 6 the fourth top-view structure diagram of the display panel provided by the embodiment of the present application;

[0032] Figure 7 a schematic flow chart of the preparation method of the display panel provided by the embodiment of the present application. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0035] The embodiment of the present application provides a display panel and a preparation method of the display panel. The following will be described in detail respectively. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments.

[0036] Refer to Figure 1 and Figure 2, this application provides a display panel, the display panel includes a display area AA and a non-display area AZ adjacent to the display area AA; the display panel includes a substrate 1, a pixel defining layer 2 disposed on the substrate 1, and a light-emitting functional layer; the pixel defining layer 2 includes a plurality of first sub-pixel openings 20 located in the display area AA, and at least one strip-shaped barrier 30 located in the non-display area AZ, the strip-shaped barrier 30 extends along a first direction Y, and the first reverse Y is parallel to the side of the display area AA close to the strip-shaped barrier 30; the light-emitting functional layer includes a plurality of first sub-pixels 201 disposed in the display area AA, and at least one correction unit group disposed in the non-display area AZ, one first sub-pixel 201 is disposed in one first sub-pixel opening 20, and one correction unit group is disposed on one strip-shaped barrier 30 and includes a plurality of printing correction units 301 arranged in sequence from one end of the strip-shaped barrier 30 to the other end of the strip-shaped barrier 30.

[0037] It can be understood that currently, the inkjet printing method for manufacturing OLED products has received wide attention. Functional film layers such as the hole injection layer, hole transport layer, and light-emitting material can all adopt the inkjet printing process. However, during the inkjet printing process, due to the differences in the ink droplet ejection speed and ejection time, it is easy to cause the ink droplet landing position to deviate from the ideal landing position, resulting in the ink droplet landing outside the pixel pit or even in the adjacent pixel pits, causing color mixing and affecting the display effect of the display panel. In the embodiments of this application, the display panel includes the strip-shaped barrier 30 located in the non-display area AZ and the correction unit group located on the strip-shaped barrier 30. During inkjet printing, first, printing is performed in the non-display area AZ, that is, the ink droplets are landed on the strip-shaped barrier 30 to form the correction unit group. The correction unit group includes a plurality of the printing correction units 301. By analyzing the positions of the printing correction units 301 in the correction unit group, the ink ejection time of the inkjet printing head is adjusted. Then, when inkjet printing is performed in the display area AA, the ink droplets are landed in the first sub-pixel openings 20, avoiding the ink droplets from falling into the adjacent first sub-pixel openings 20, improving the accuracy of inkjet printing, avoiding color mixing, and achieving a better display effect.

[0038] Continuing from the above, specifically, refer to Figure 6, before correcting the droplet landing position in inkjet printing, there is a large deviation error between the droplet landing position and the ideal landing position. That is, the printing correction units 301 are arranged in sequence from one end to the other end on the strip-shaped retaining wall 30, and the arrangement of the printing correction units 301 on the strip-shaped retaining wall 30 does not strictly extend along the first direction. The deviation error between the droplet landing position and the ideal landing position is reduced by the correction system, so that the deviation error between the droplet landing position and the ideal landing position is less than or equal to a certain allowable error range. The correction system includes a camera system, an image processing system, and a control system. The camera system obtains the position information of each of the printing correction units 301 in a group of correction units through image acquisition, and transmits the position information of each of the printing correction units 301 to the image processing system. The image processing system analyzes the offset amount of each of the printing correction units 301 through the position information of each of the printing correction units 301, and transmits the offset amount of each of the printing correction units 301 to the control system. The control system converts the offset amount of each of the printing correction units 301 into a deviation amount of the ink droplet ejection time, and then adjusts the ejection time of each ink droplet, so that the ink droplet lands within the first sub-pixel opening 20 of the display area AA, and avoids the ink droplet falling outside the first sub-pixel opening 20, thereby improving the inkjet printing accuracy.

[0039] It should be noted that during the pixel preparation process, the printing correction unit 301 is formed by an ink droplet landing on the strip-shaped retaining wall 30. In the early stage of the pixel preparation process, the ink droplet lands on the strip-shaped retaining wall 30 to form a printing unit. The printing unit may be a liquid including a solvent. In the later stage of the pixel preparation process, the printing unit is dried, and the solvent is evaporated to form the solid printing correction unit 301; in the first reverse Y direction, the length of the strip-shaped retaining wall 30 is greater than or equal to the length of the display area AA; the substrate 1 may be an array substrate, and the array substrate includes thin film transistors, scan lines, data lines, etc. These details can be implemented with reference to the prior art and will not be elaborated here.

[0040] It is worth noting that in the first direction, the thickness of the strip-shaped retaining wall 30 is less than or equal to the thickness of the pixel defining layer 2; each of the retaining walls 30 may be only located in the non-display area AZ on one side of the display area AA, or each of the retaining walls 30 may be located in the non-display areas AZ on both sides of the display area AA.

[0041] In some embodiments, refer to Figure 2 , there is a strip-shaped groove 40 between any two adjacent strip-shaped retaining walls 30 located on the same side of the non-display area AZ, and the light-emitting functional layer includes a filling sub-layer 401 located in the strip-shaped groove 40.

[0042] It can be understood that when manufacturing an OLED product using an inkjet printing method, the material must be dissolved in a solvent for printing. During the printing process, in the area closer to the edge of the AA (Active Area), the solvent in the pixel is more likely to volatilize. Thus, due to the different solvent atmospheres in the peripheral area and the central area of the AA, the drying rate in the middle area of the AA is slower, while the drying rate in the peripheral area is faster. As a result, a phenomenon of poor drying (mura) is likely to occur in the peripheral area of the AA, affecting the display effect. In this embodiment, there is a strip groove 40 between any two adjacent strip-shaped retaining walls 30 on the same side of the non-display area AZ. During inkjet printing, the printing ink in the strip groove 40 is kept consistent with the printing ink in the first sub-pixel opening 20, that is, the materials of the filling sub-layer 401 and the first sub-pixel 201 are the same, which increases the concentration of the solvent atmosphere in the edge area of the display area AA, reduces the drying rate of the solvent in the pixels at the edge of the display area AA, improves the mura problem caused by the different solvent atmospheres in the edge area and the middle area of the display area AA, and improves the display effect.

[0043] In some embodiments, continue to refer to Figure 2 , a plurality of the first sub-pixels 201 include a plurality of sub-pixel groups arranged along the second direction X. A sub-pixel group includes a plurality of the first sub-pixels 201 arranged along the first direction Y. The second direction X is perpendicular to the first direction Y. In the second direction X, a plurality of the printing correction units 301 in a correction unit group are arranged in one-to-one correspondence with a plurality of the first sub-pixels 201 in a sub-pixel group.

[0044] Specifically, in the second direction X, a plurality of the first sub-pixels 201 include a plurality of sub-pixel groups. Any one of the sub-pixel groups includes one of the first sub-pixels 201, and any one of the correction unit groups includes one of the printing correction units 301. In the first direction Y, any one of the sub-pixel groups includes a plurality of the first sub-pixels 201, and any one of the correction unit groups includes a plurality of the printing correction units 301. The number of the printing correction units 301 in one correction unit group is equal to the number of the first sub-pixels 201 in one sub-pixel group. In the first direction Y, a plurality of the printing correction units 301 in one correction unit group are arranged in one-to-one correspondence with a plurality of the first sub-pixels 201 in one sub-pixel group. It can be understood that along the first direction Y, the number of the printing correction units 301 in one correction unit group is equal to the number of the first sub-pixels 201 in one sub-pixel group. Along the second direction X, any one of the first sub-pixels 201 has a corresponding printing correction unit 301. That is, during inkjet printing, all the first sub-pixels 201 in the display area AA have corresponding printing correction units 301, which can correct the droplet landing positions of all the first sub-pixels 201 in the display area AA, improve the printing accuracy of the entire display panel, avoid color mixing, and achieve a better display effect.

[0045] In some embodiments, referring to Figure 4 , the first sub-pixel 201 includes a plurality of functional sub-layers arranged in a stacked manner; the number of the strip-shaped barriers 30 is greater than or equal to the number of the functional sub-layers. The pixel defining layer 2 includes a plurality of correction unit groups corresponding to each of the functional sub-layers one by one. The material of one functional sub-layer is the same as the materials of the printing correction units 301 in the corresponding correction unit group.

[0046] It can be understood that the plurality of functional sub-layers include functional film layers such as a hole injection layer, a hole transport layer, and a light-emitting layer. The light-emitting layer includes a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer, and the materials of different functional sub-layers are different.

[0047] Specifically, when the number of the strip-shaped barriers 30 is equal to the number of the functional sub-layers, for example, the multiple functional sub-layers include a hole injection layer, a hole transport layer, a blue light-emitting layer, a green light-emitting layer, and a red light-emitting layer, the number of the functional sub-layers is 5, the number of the strip-shaped barriers 30 is 5, and the number of the correction unit groups is 5. The ink of one functional sub-layer is printed on one strip-shaped barrier 30, that is, the material of one functional sub-layer is the same as the material of each printing correction unit 301 in the corresponding correction unit group, so as to adjust the droplet landing positions of the multiple functional sub-layers and improve the printing accuracy of inkjet printing in the display area AA. When the number of the strip-shaped barriers 30 is greater than the number of the functional sub-layers, for example, the multiple functional sub-layers include a hole injection layer, a hole transport layer, a blue light-emitting layer, a green light-emitting layer, and a red light-emitting layer, the number of the functional sub-layers is 5, the number of the strip-shaped barriers 30 is 6, and the number of the correction unit groups can be 5. The ink of one functional sub-layer is printed on one strip-shaped barrier 30, that is, the material of one functional sub-layer is the same as the material of each printing correction unit 301 in the corresponding correction unit group. There is no correction unit group on the remaining one strip-shaped barrier 30, that is, the ink of the functional sub-layer is not printed on one strip-shaped barrier 30. The number of the correction unit groups can also be 6. The inks of 5 functional sub-layers are respectively printed on 5 strip-shaped barriers 30, and the ink of any functional sub-layer can be printed again on the remaining one strip-shaped barrier 30, and the correction of the droplet landing positions of the functional sub-layer printed twice is more accurate.

[0048] In some embodiments, referring to Figure 3 and Figure 4 , the display panel further includes an anode layer disposed between the substrate 1 and the pixel defining layer 2. The anode layer includes a plurality of first electrodes 51 located in the display area and at least one reflective electrode 52 located in the non-display area AZ. One first electrode 51 is correspondingly disposed with one first sub-pixel opening 20, and one reflective electrode 52 is correspondingly disposed with one correction unit group, and the reflective electrode 52 is located on the side of the strip-shaped barrier 30 away from the correction unit group.

[0049] Specifically, the printing correction unit 301 is provided on the strip-shaped retaining wall 30, a reflective electrode 52 is disposed between the strip-shaped retaining wall 30 and the substrate 1, and the strip-shaped retaining wall 30 covers the reflective electrode 52. In other words, if the printing correction unit 301 is not provided on the strip-shaped retaining wall 30, the reflective electrode 52 is not disposed between the strip-shaped retaining wall 30 and the substrate 1 either. The reflective electrode 52 may be a strip-shaped reflective anode. The reflective electrode 52 includes a first conductive layer, a metal reflective layer, and a second conductive layer stacked in sequence. The metal reflective layer is located between the first conductive layer and the second conductive layer. Both the first conductive layer and the second conductive layer may be transparent conductive layers to improve the film-forming property of the metal reflective layer. The metal reflective layer includes a metal thin film, so that the reflective electrode 52 can reflect light, improving the contrast when the imaging system takes pictures of the correction unit group, and obtaining clearer position information of each printing correction unit 301.

[0050] It should be noted that the first conductive layer may be a semiconductor transparent conductive film, such as ITO (Indium tin oxide) and IZO (indium zinc oxide). The thickness of the first conductive layer is 100-200 nm. The material of the second conductive layer may be the same as that of the first conductive layer, and the thickness of the second conductive layer may be 100-200 nm. Both the first conductive layer and the second conductive layer can be prepared by a sputtering process; the material of the metal reflective layer may be any one of aluminum (Al), silver (Ag), and magnesium (Mg). In order to achieve a good reflection effect, the thickness of the metal layer is preferably 50-1000 nm, and the metal reflective layer is prepared by a thermal evaporation process.

[0051] In some embodiments, refer to Figure 5 , in the second direction X, the width of the reflective electrode 52 is greater than or equal to 1 / 3 of the width of the strip-shaped retaining wall 30 and less than the width of the strip-shaped retaining wall 30.

[0052] Specifically, in the first direction Y, the central axes of the reflective electrode 52 and the barrier wall 30 coincide. In the second direction X, the width between any two adjacent strip-shaped barrier walls 30 is L3. The length of L3 can be selected from 30 to 200 μm, preferably 100 μm. The width of the reflective electrode 52 is L2. The length of L2 can be selected from 40 to 120 μm, preferably 100 μm. Half of the width difference between the strip-shaped barrier wall 30 and the reflective electrode 52 is L1, that is, the distance between the reflective electrode 52 and the strip-shaped barrier wall 30 is L1. The length of L1 can be selected from 3 to 10 μm, preferably 5 μm. In the second direction X, the width of the reflective electrode 52 is greater than or equal to 1 / 3 of the width of the strip-shaped barrier wall 30 and less than the width of the strip-shaped barrier wall 30, which can effectively reflect light and achieve a better contrast effect.

[0053] It should be noted that in the first direction Y, the central axes of the reflective electrode 52 and the barrier wall 30 may not coincide, as long as the barrier wall 30 covers the reflective electrode 52.

[0054] In some embodiments, referring to Figure 4 , the pixel defining layer 2 includes a plurality of second sub-pixel openings 50 located between the display area AA and the strip-shaped barrier wall 30. The light-emitting functional layer includes a plurality of second sub-pixels 501 located in the non-display area AZ. One second sub-pixel 501 is provided in one second sub-pixel opening 50; the anode layer includes a plurality of second electrodes 53. One second electrode 53 is disposed corresponding to one second sub-pixel opening 50 and is located between the second sub-pixel 501 and the substrate 1.

[0055] Specifically, the light-emitting functional layer includes a plurality of second sub-pixels 501 located within the non-display area AZ. The second sub-pixels 501 extend along the first direction Y. The plurality of first sub-pixels 201 include a plurality of sub-pixel groups arranged along the second direction X. One sub-pixel group includes a plurality of the first sub-pixels 201 arranged along the first direction Y. The number of the plurality of second sub-pixels 501 is the same as the number of the plurality of first sub-pixels 201 in one sub-pixel group. In the second direction X, the plurality of second sub-pixels 501 are arranged in one-to-one correspondence with the plurality of first sub-pixels 201 in one sub-pixel group. During inkjet printing, the same ink is printed in the second sub-pixel opening 50 and the first sub-pixel opening 20, that is, the material of the second sub-pixel 501 is the same as the material of the first sub-pixel 201, which increases the concentration of the solvent atmosphere in the edge area of the display area AA, reduces the drying speed of the solvent in the edge pixels of the display area AA, improves the mura problem caused by the different solvent atmospheres in the edge area and the middle area of the display area AA, and improves the display effect.

[0056] Optionally, in this embodiment, the second electrode 53 may be an island-shaped reflective anode. The characteristics of the reflective anode are the same as those of the reflective electrode 52, which will not be elaborated here. The second electrode 53 can improve the spreading property of the ink, so that the ink in the second sub-pixel opening 50 has the same spreading state as the ink in the first sub-pixel opening 20, which is beneficial to providing the same solvent atmosphere for the second sub-pixels 501 at the edge of the display area AA as that for the first sub-pixels 201 in the middle of the display area AA.

[0057] Optionally, in this embodiment, the size and arrangement structure of the second sub-pixel opening 50 are exactly the same as those of the first sub-pixel opening 20 located within the display area AA, which is more beneficial to providing the same solvent atmosphere for the second sub-pixels 501 at the edge of the display area AA as that for the first sub-pixels 201 in the middle of the display area AA.

[0058] Optionally, along the first direction Y, the length of the second sub-pixel group may be greater than the length of the first sub-pixel group.

[0059] In some embodiments, the materials of both the second sub-pixels 501 and the filling sub-layer 401 are the same as the material of the first sub-pixels 201.

[0060] Specifically, the first sub-pixel 201 includes a hole injection layer, a hole transport layer, and a blue light-emitting layer / green light-emitting layer / red light-emitting layer. The ink compositions of different functional film layers are different. The second sub-pixel 501 and the filling sub-layer 401 can have the same ink composition as any one of the hole injection layer, the hole transport layer, and the blue light-emitting layer / green light-emitting layer / red light-emitting layer. The second sub-pixel 501 and the filling sub-layer 401 can also include various inks of the hole injection layer, the hole transport layer, and the blue light-emitting layer / green light-emitting layer / red light-emitting layer, all of which can achieve an increase in the concentration of the solvent atmosphere at the AA edge of the display area.

[0061] In some embodiments, one side of the strip-shaped barrier 30 close to the correction unit group has a hydrophobic surface 60.

[0062] Specifically, the pixel defining layer 2 includes the strip-shaped barrier 30. The material of the pixel defining layer 2 can be an organic resin photoresist or SiO2, preferably a negative fluorinated organic resin photoresist. The thickness of the pixel defining layer 2 can be selected from 0.5 to 3.0 um, preferably 1 um. One side of the pixel defining layer 2 away from the substrate 1 has a hydrophobic surface 60, that is, one side of the strip-shaped barrier 30 close to the correction unit group has a hydrophobic surface 60. On the one hand, it makes the printing correction unit 301 present a hemispherical shape on the strip-shaped barrier 30, facilitating the correction system to capture an image for position analysis of the printing correction unit 301. On the other hand, the repellency of the pixel defining layer 2 to ink droplets is beneficial to the ink droplets dropping into the first sub-pixel opening 201 and the second sub-pixel opening 501.

[0063] Optionally, in this embodiment, the contact angle of the surface of the pixel defining layer 2 away from the substrate 1 is > 60°. A contact angle measurement system is used to measure the material contact angle. The contact angle measurement system includes a photographic system and an analysis system. An organic solvent is used as the test object, and the organic solvent can be anisole. The material of the pixel defining layer 2 is used as the object to be tested. A contact image between the test object and the object to be tested is obtained through the photographic system, and the analysis system analyzes the contact angle in the image to obtain the contact angle data.

[0064] Refer to Figure 7 , the present application also provides a method for manufacturing a display panel. Using the display panel described in any of the foregoing embodiments, the method for manufacturing the display panel includes the following steps:

[0065] S10, provide a substrate 1. The display panel includes a display area AA and a non-display area AZ.

[0066] Specifically, the substrate 1 can be an array substrate. The substrate 1 includes a glass substrate and thin film transistors formed on the glass substrate.

[0067] S20. Form a pixel defining layer 2 on the substrate 1. The pixel defining layer 2 includes a plurality of first sub-pixel openings 20 formed in the display area AA and at least one strip-shaped barrier 30 formed in the non-display area AZ. The strip-shaped barrier 30 extends along the first direction Y, and the first direction Y is parallel to the side of the display area AA close to the strip-shaped barrier 30.

[0068] Step S20 includes the following steps:

[0069] S201. Prepare an anode layer on the substrate 1. The anode layer includes a first electrode 51 in the display area AA, a reflective electrode 52 and a second electrode 53 in the non-reality area AZ. The second electrode 53 can be a reflective electrode. The reflective electrode can be a three-layer stack structure of a first conductive layer / metal reflective layer / second conductive layer. Both the first conductive layer and the second conductive layer can be transparent conductive layers. The materials of the first conductive layer and the second conductive layer can both be ITO. The preparation process is sputtering, and the thickness can be selected from 100 to 200 nm. The material of the metal reflective layer can be silver (Ag), and the preparation process is thermal evaporation, and the thickness can be selected from 50 to 500 nm.

[0070] S202. Prepare the pixel defining layer 2 on the substrate 1 and the anode layer. The material of the pixel defining layer 2 can be a negative fluorine-containing organic resin photoresist, and the thickness can be selected as 1 um. The pixel defining layer includes the first sub-pixel openings 20 in the display area AA, second sub-pixel openings 501 in the non-display area AZ and the strip-shaped barrier 30. The second sub-pixel openings and the strip-shaped barrier extend along the first direction Y, and the number of the strip-shaped barriers can be 5.

[0071] S30. Form a light-emitting functional layer on the substrate 1 and the pixel defining layer 2. The light-emitting functional layer includes a plurality of first sub-pixels 201 formed in the display area AA and at least one calibration unit group formed in the non-display area AZ. One first sub-pixel 201 is disposed in one first sub-pixel opening 20, and one calibration unit group is disposed on one strip-shaped barrier 30 and includes a plurality of printing calibration units 301 arranged in sequence from one end of the strip-shaped barrier 30 to the other end of the strip-shaped barrier 30.

[0072] Specifically, refer to Figure 1, the light-emitting functional layer is prepared on the substrate and the pixel defining layer 2. The light-emitting functional layer includes a plurality of the first sub-pixels 201 formed in the display area AA and a plurality of the printing correction units 301 formed in the non-display area AZ. The preparation of the printing correction units 301 precedes the preparation of the first sub-pixels 201. That is, during inkjet printing, a plurality of the printing correction units 301 are first prepared on one of the strip-shaped barriers 30. A plurality of the printing correction units 301 on one strip-shaped barrier 30 constitute a set of correction unit groups. By analyzing the positions of the printing correction units 301 in the correction unit group on the strip-shaped barrier 30, the ink ejection time of the inkjet printing is adjusted so that the ink droplets printed with the adjusted ink ejection time fall on the ideal dripping positions, and then the first sub-pixels 201 are prepared in the display area AA with the adjusted ink ejection time.

[0073] In this application, the strip-shaped barrier 30 is provided in the non-display area AZ and the correction unit group is provided on the strip-shaped barrier 30. During inkjet printing, printing is first performed in the non-display area AZ, that is, the ink droplets are dropped on the strip-shaped barrier 30 to form the correction unit group. The correction unit group includes a plurality of the printing correction units 301. By analyzing the positions of the printing correction units 301 in the correction unit group, the ink ejection time of the inkjet print head is adjusted. Then, when inkjet printing is performed in the display area AA, the ink droplets are made to fall into the first sub-pixel openings 20, avoiding the ink droplets from falling into the adjacent first sub-pixel openings 20, improving the accuracy of inkjet printing, avoiding color mixing, and achieving a better display effect.

[0074] The above has introduced the embodiments of the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A display panel, characterized in that, The display panel includes a display area and a non-display area adjacent to the display area; A substrate; A pixel defining layer disposed on the substrate, including a plurality of first sub-pixel openings located in the display area and at least one strip-shaped barrier located in the non-display area. The strip-shaped barrier extends in a first direction, and the first direction is parallel to the side of the display area close to the strip-shaped barrier; A light-emitting functional layer, including a plurality of first sub-pixels disposed in the display area and at least one correction unit group disposed in the non-display area. A first sub-pixel is disposed in a first sub-pixel opening, and a correction unit group is disposed on a strip-shaped barrier and includes a plurality of printing correction units arranged in sequence from one end of the strip-shaped barrier to the other end of the strip-shaped barrier; Wherein, the side of the strip-shaped barrier close to the correction unit group has a hydrophobic surface.

2. The display panel according to claim 1, wherein A strip-shaped groove is provided between any two adjacent strip-shaped barriers on the same side of the non-display area. The light-emitting functional layer includes a filling sub-layer located in the strip-shaped groove.

3. The display panel according to claim 1, wherein The plurality of first sub-pixels include a plurality of sub-pixel groups arranged in a second direction. A sub-pixel group includes a plurality of first sub-pixels arranged in the first direction. The second direction is perpendicular to the first direction. In the second direction, a plurality of printing correction units in a correction unit group are arranged in one-to-one correspondence with a plurality of first sub-pixels in a sub-pixel group.

4. The display panel according to claim 1, characterized in that, The first sub-pixel includes a plurality of functional sub-layers stacked; The number of the strip-shaped barriers is greater than or equal to the number of the functional sub-layers. The pixel defining layer includes a plurality of correction unit groups corresponding to each functional sub-layer one by one. The material of a functional sub-layer is the same as the material of each printing correction unit in the corresponding correction unit group.

5. The display panel according to claim 2, wherein The display panel further includes an anode layer disposed between the substrate and the pixel defining layer. The anode layer includes a plurality of first electrodes located in the display area and at least one reflective electrode located in the non-display area; A first electrode is disposed corresponding to a first sub-pixel opening. A reflective electrode is disposed corresponding to a correction unit group, and the reflective electrode is located on the side of the strip-shaped barrier away from the correction unit group.

6. The display panel according to claim 5, wherein, In the second direction, the width of the reflective electrode is greater than or equal to 1 / 3 of the width of the strip-shaped barrier and less than the width of the strip-shaped barrier.

7. The display panel according to claim 5, wherein, The pixel defining layer includes a plurality of second sub-pixel openings located between the display area and the strip-shaped barrier. The light-emitting functional layer includes a plurality of second sub-pixels located in the non-display area. A second sub-pixel is disposed in a second sub-pixel opening; The anode layer includes a plurality of second electrodes. A second electrode is disposed corresponding to a second sub-pixel opening and is located between the second sub-pixel and the substrate.

8. The display panel according to claim 7, wherein The materials of the second sub-pixel and the filling sub-layer are both the same as the material of the first sub-pixel.

9. A method for manufacturing a display panel, characterized in that, Including the following steps: Providing a substrate, the display panel including a display area and a non-display area; A pixel defining layer is formed on the substrate. The pixel defining layer includes a plurality of first sub-pixel openings formed in the display area and at least one strip-shaped barrier rib formed in the non-display area. The strip-shaped barrier rib extends in a first direction, and the first direction is parallel to the side of the display area close to the strip-shaped barrier rib. A light-emitting functional layer is formed on the substrate and the pixel defining layer. The light-emitting functional layer includes a plurality of first sub-pixels formed in the display area and at least one calibration unit group formed in the non-display area. One of the first sub-pixels is disposed in one of the first sub-pixel openings, and one of the calibration unit groups is disposed on one of the strip-shaped barrier ribs and includes a plurality of printing calibration units arranged in sequence from one end of the strip-shaped barrier rib to the other end of the strip-shaped barrier rib. The side of the strip-shaped barrier rib close to the calibration unit group has a hydrophobic surface.

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