CN110473899B - Display panel, display device and display panel preparation method - Google Patents
Display panel, display device and display panel preparation method Download PDFInfo
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- CN110473899B CN110473899B CN201910761612.5A CN201910761612A CN110473899B CN 110473899 B CN110473899 B CN 110473899B CN 201910761612 A CN201910761612 A CN 201910761612A CN 110473899 B CN110473899 B CN 110473899B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
Abstract
The embodiment of the invention provides a display panel, a display device and a display panel preparation method, and solves the problems of uneven pixel unit thickness and poor film layer uniformity of the conventional display panel. The display panel comprises a substrate and a pixel defining layer arranged on the substrate, wherein the pixel defining layer comprises a pixel groove and a balance groove, the pixel groove penetrates through a first surface and a second surface opposite to the first surface of the pixel defining layer, and the balance groove is connected with the pixel groove in a penetrating mode. The display panel provided by the embodiment of the invention can effectively ensure the reasonable edge thickness of the pixel unit, and prevent the occurrence of the situation that the edge thickness of the pixel unit is too small, thereby improving the film uniformity of the pixel unit and ensuring the luminous performance of the display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a display device and a display panel preparation method.
Background
Organic Light-Emitting Diode (OLED) display devices occupy an important position in the display technology field due to their advantages of being Light and thin, high in brightness, low in power consumption, high in definition, and the like. At present, in the process of manufacturing the OLED display device, the pixel unit of the OLED display device is generally manufactured based on the inkjet printing technology. Specifically, an ink material is injected into a pixel container of the display panel using an inkjet printing process to form ink droplets, which are spread within the pixel container to finally form a pixel unit.
However, the thickness of the pixel unit in the existing pixel container is not uniform, the uniformity of the film layer is poor, and the light emitting performance of the device is affected.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a display panel, a display device and a method for manufacturing the display panel, so as to solve the problems of non-uniform thickness of pixel units and poor uniformity of film layers of the conventional display panel.
In a first aspect, an embodiment of the present invention provides a display panel, which includes a substrate and a pixel defining layer disposed on the substrate, where the pixel defining layer includes a pixel groove and a balance groove, where the pixel groove penetrates through a first surface and a second surface opposite to the first surface of the pixel defining layer, and the balance groove is connected to the pixel groove.
In an embodiment of the invention, the first surface includes a first region, the pixel groove includes a first groove surface region adjacent to the first region, and the balance groove penetrates through the first groove surface region; preferably, the balancing groove also extends through the first region.
In an embodiment of the invention, the first surface includes a second region, the pixel groove includes a second groove surface region adjacent to the second region, and the balance groove penetrates through the second groove surface region; preferably, the balancing groove also extends through the second region.
In an embodiment of the present invention, a ratio of an opening area of the balancing groove in the first region to an area of the first region is greater than a manufacturing precision value of the balancing groove and smaller than a supporting collapse value of the pixel defining layer of the first region; preferably, the ratio of the opening area of the balancing groove in the first region to the area of the first region ranges from 20% to 50%.
In an embodiment of the invention, the number of the pixel slots is multiple, and the balance slot penetrates through at least two pixel slots.
In an embodiment of the invention, the balance groove is located in an inner region of the pixel defining layer.
In an embodiment of the invention, the display panel further includes a pixel unit layer, the pixel unit layer includes pixel units prepared based on an inkjet printing method, and the pixel units are located in the corresponding pixel grooves and the balance grooves.
In a second aspect, an embodiment of the present invention further provides a display apparatus, which includes an electronic device and a display panel as mentioned in any of the above embodiments, in signal connection with the electronic device.
In a third aspect, an embodiment of the present invention further provides a method for manufacturing a display panel, where the method for manufacturing a display panel includes preparing a substrate; a pixel defining layer including a pixel groove and a balance groove is prepared on a substrate, wherein the pixel groove penetrates through a first surface and a second surface opposite to the first surface of the pixel defining layer, and the balance groove is connected to the pixel groove.
In an embodiment of the present invention, the method for manufacturing a display panel further includes manufacturing a pixel unit layer including pixel units based on an inkjet printing method, wherein the pixel units are located in the corresponding pixel slots and the balancing slots.
The display panel provided by the embodiment of the invention can effectively ensure the reasonable edge thickness of the pixel unit, and prevent the occurrence of the situation that the edge thickness of the pixel unit is too small, thereby improving the film uniformity of the pixel unit and ensuring the luminous performance of the display device.
Drawings
Fig. 1a is a schematic top view of a display panel according to an embodiment of the invention.
Fig. 1b is a schematic front view illustrating a display panel according to an embodiment of the invention.
Fig. 1c is a schematic front view illustrating a display panel including a pixel unit according to an embodiment of the invention.
Fig. 2 is a schematic front view illustrating a display panel according to another embodiment of the present invention.
Fig. 3 is a schematic top view of a display panel according to another embodiment of the invention.
Fig. 4 is a schematic top view illustrating a display panel according to still another embodiment of the invention.
Fig. 5 is a schematic top view illustrating a display panel according to still another embodiment of the invention.
Fig. 6a is a schematic top view illustrating a display panel according to still another embodiment of the invention.
Fig. 6b is a schematic front view illustrating a display panel according to still another embodiment of the present invention.
Fig. 7 is a schematic top view illustrating a display panel according to still another embodiment of the invention.
Fig. 8 is a schematic flow chart illustrating a method for manufacturing a display panel according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the spreading process of the ink drop, because the contact angle between the ink drop and the substrate of the pixel container is large, the spreading shape with thick middle and thin edge is easy to present, and further the thickness of the pixel unit formed after drying is not uniform, and the luminous performance of the device is influenced.
Fig. 1a is a schematic top view of a display panel according to an embodiment of the invention. Fig. 1b is a schematic front view illustrating a display panel according to an embodiment of the invention. Fig. 1c is a schematic front view illustrating a display panel including a pixel unit according to an embodiment of the invention. Specifically, FIG. 1b is a schematic cross-sectional view taken along the section line A-A in FIG. 1 a.
As shown in fig. 1a and 1b, the display panel according to the embodiment of the present invention includes a substrate 1 having a rectangular plate shape and a pixel defining layer 2 stacked on the substrate 1. Wherein the pixel defining layer 2 comprises pixel grooves 21 which penetrate the upper and lower surfaces of the pixel defining layer 2 in the stacking direction (the vertical direction of the orientation as shown in fig. 1 b). That is, the pixel grooves 21 penetrate a first surface (an upper surface of the pixel defining layer in the orientation shown in fig. 1 b) and a second surface (a lower surface of the pixel defining layer in the orientation shown in fig. 1 b) of the pixel defining layer 2 opposite to the first surface. Further, the pixel defining layer 2 further includes a balance groove 22 that is connected to the pixel groove 21 through. The pixel groove 21 is a rectangular through groove, the pixel groove 21 forms a pixel container capable of accommodating a pixel unit with the substrate 1, and the balance groove 22 is a plate-shaped groove.
In the embodiment of the present invention, the first surface of the pixel defining layer 2 includes two first regions M1 divided based on the pixel grooves 21. Each of the first regions M1 is adjacent to the pixel groove 21, that is, each of the first regions M1 is disposed adjacent to the opening of the pixel groove 21, and each of the first regions M1 is a region of the first surface extending a predetermined distance away from the pixel groove 21 with reference to the opening length of the pixel groove 21 on the side thereof. It should be understood that the specific size of the first region M1 may be determined according to practical situations, and embodiments of the present invention are not limited to this. Specifically, each of the first regions M1 is a surface region of the first surface located on either side of the first extending side of the pixel slot 21, where the first extending side is an opposite side of the pixel slot 21, i.e. the left and right sides of the pixel slot 21 oriented as shown in fig. 1 a. In fig. 1a, two first regions M1 are regions of the first surface framed within a dashed line frame M1.
The pixel grooves 21 penetrate the first surface and the second surface of the pixel defining layer 2, the sidewalls are formed as groove face regions of the pixel grooves 21, and each of the first regions M1 has a first groove face region of the pixel groove 21 adjacent thereto. In other words, each first groove surface area is also located on either one of the first extending sides of the pixel groove 21 and is disposed adjacent to the corresponding first area M1. In the embodiment of the present invention, the two balance grooves 22 are respectively located at two opposite sides included in the first extending side of the pixel groove 21. Each balance groove 22 penetrates one first region M1 of the pixel defining layer 2 and the first groove face region of the pixel groove 21 adjacent to the first region M1.
As shown in fig. 1c, in the process of preparing the pixel unit 3 based on the display panel mentioned in the embodiment of the present invention, after the pixel material is injected into the pixel container formed by the pixel groove 21 and the substrate 1 through the inkjet printing process, the equilibrium groove 22 can effectively confine the ink material flowing therein within the equilibrium groove 22. Because the balance groove 22 has the function of limiting the ink material, and can also increase the accommodating space of the pixel container, so that the liquid leveling ensures the surface smoothness, compared with the prior art, the embodiment of the invention can effectively ensure the reasonable edge thickness of the pixel unit, prevent the occurrence of the situation that the edge thickness of the pixel unit is too small, further improve the film uniformity of the pixel unit, and ensure the light-emitting performance of the display device.
In the above-mentioned inkjet printing (IJP) process, the ink is a mixed solution of a pixel unit material and a quick-drying solvent (e.g., ethanol, methanol, dichloro, etc.), and after the ink is printed in a container on a substrate, the pixel material dispersed in the solvent is leveled with the flow of the solvent, and the quick-drying solvent is rapidly evaporated to form a pixel unit layer with a uniform film thickness. The pixel unit material comprises a red pixel luminescent material, a green pixel luminescent material, a blue pixel luminescent material, a hole transport material, a hole blocking material, an electron transport material, an electron blocking material and the like. Of course, the ink-jet printing process can also be used to fabricate other layers of the display panel, and the material dispersed in the quick-drying solvent can be changed correspondingly.
Note that, in the display panel mentioned in the above embodiment, the content of improvement of the pixel defining layer is a matter of importance. Therefore, it can be understood by those skilled in the art that the pixel defining layer mentioned in the embodiments of the present invention can also be applied to display panels having other film layer structures. In addition, it should be noted that the sizes of the pixel groove 21 and the balance groove 22 may be determined according to actual situations, and this is not limited in the embodiment of the present invention.
Furthermore, it should be understood that the opening position of the balance groove 22 in the first groove surface area of the pixel groove 21 should ensure that the pixel unit 3 can flow into the balance groove 22, so that the balance groove 22 achieves the above-mentioned advantageous effects of the above-mentioned embodiments. It is preferable that the opening position of the balance groove 22 at the first groove face region of the pixel groove 21 is higher than the substrate 1 to prevent an adverse effect on the substrate 1 during the process of preparing the balance groove 22.
Alternatively, the balancing groove 22 in the embodiment shown in fig. 1a to 1c may not penetrate through the first surface of the pixel defining layer 2. At this time, compared with the existing display panel without the balance groove 22, the balance groove 22 in the embodiment of the present invention can also limit the ink material in the balance groove 22, and can increase the accommodating space of the pixel container, thereby effectively ensuring the reasonable edge thickness of the pixel unit, preventing the occurrence of the situation that the edge thickness of the pixel unit is too small, improving the film uniformity of the pixel unit, and ensuring the light emitting performance of the display device.
It should be noted that the specific shape of the balance groove 22 is not limited in the embodiment of the present invention. For example, the equalization channel 22 may also be shaped as shown in FIG. 2. Specifically, fig. 2 is a schematic front view of a display panel according to another embodiment of the present invention. The embodiment shown in fig. 2 of the present invention is extended from the embodiment shown in fig. 1a to 1c of the present invention, and the differences between the embodiment shown in fig. 2 and the embodiment shown in fig. 1a to 1c will be emphasized below, and the descriptions of the same parts will be omitted.
As shown in fig. 2, in the display panel according to the embodiment of the present invention, the balance groove 22 is a plate-shaped groove including a bending corner. It will be appreciated that the provision of the balancing tank 22 according to embodiments of the present invention also enables the advantageous effects mentioned in relation to the embodiment shown in figures 1a to 1c to be achieved.
The balance groove 22 may have another shape. The embodiment of the present invention does not limit the specific shape of the equilibrium groove 22, as long as the equilibrium groove 22 can achieve the purpose of restricting the ink material and/or increasing the accommodating space of the pixel container.
In an embodiment of the present invention, the ratio of the opening area of the balancing groove 22 in the first region M1 to the area of the first region M1 needs to be greater than the manufacturing precision of the balancing groove 22 and smaller than the pixel defining layer support collapse value of the first region M1. Preferably, the ratio of the opening area of the balancing groove 22 in the first region M1 to the area of the first region M1 ranges from 20% to 50%. It should be noted that the manufacturing accuracy value of the balance groove refers to a minimum limit value which can be reached by process manufacturing, the manufacturing accuracy value is not lower than the manufacturing accuracy value of the balance groove, the manufacturing difficulty of the balance groove can be effectively reduced, the pixel limiting layer supporting collapse value refers to a critical value which is that a hole of a pixel limiting layer is communicated with the pixel groove and cannot collapse, the ratio range is 20% to 50%, the manufacturing efficiency of the display panel provided by the embodiment of the invention can be effectively improved, and meanwhile, the film uniformity of a pixel unit is improved.
Preferably, another embodiment of the present invention is extended from the embodiment of the present invention shown in fig. 1a to 1 c. In the embodiment of the present invention, the extending angle of the balance groove 22 is smaller than that of the first groove face area, and the extending angles are all acute angles. Wherein the extension angle of the balance groove 22 refers to an angle of an angle between an extension plane of the balance groove 22 and the second surface of the pixel defining layer 2, and the extension angle of the first groove face area refers to an angle of an angle between an extension plane of the first groove face area and the second surface of the pixel defining layer 2. It should be understood that the extension plane of the equilibrium groove 22 refers to the extension plane of the plane where the equilibrium groove 22 is located, and when the equilibrium groove 22 has a certain thickness, the thickness can be infinitely reduced to determine the plane where the equilibrium groove 22 is located. Likewise, the plane of extension of the first groove face region refers to the plane of extension of the plane in which the first groove face region lies. When the extension angle of the equilibrium groove 22 is smaller than the extension angle of the first groove surface region, there is a gap height difference between the equilibrium groove 22 and the substrate 1, so that the embodiment of the present invention can effectively avoid the adverse effect on the substrate 1 in the preparation process of the equilibrium groove. For example, as shown in fig. 1b, the extension angle of the balance groove 22 is ≦ 1, and the extension angle of the first groove surface region is ≦ 2.
Optionally, the substrate 1 includes a stacked substrate, a thin film transistor layer, a planarization layer, an anode layer, and other film layers, where the substrate may be formed of a flexible PI material or a hard glass substrate, which is not limited herein.
Note that, for convenience of description, the display panels of the embodiments shown in fig. 1a to 1c and the embodiment shown in fig. 2 show only one pixel groove 21. However, in other display panel structures, the pixel defining layer 2 may include a plurality of pixel grooves 21 arranged in an array, and each pixel groove 21 is correspondingly provided with the balance groove 22. Further, the shape of the pixel groove 21 is not limited to the rectangular through groove mentioned in the above embodiment, and may be a circular through groove or an elliptical through groove. When the shape of the pixel groove 21 is a circular through groove or an elliptical through groove, the balance groove 22 is only required to be conformably disposed to the near-opening edge of the pixel groove 21, and the details are not described in detail.
Preferably, the opening width of the balance groove 22 at the first surface of the pixel defining layer 2 is 0.1 to 0.2 times the width between adjacent pixel units. For example, in the embodiment shown in FIG. 1a, the width of the opening of the balancing slot 22 is measured with respect to the horizontal line. According to the embodiment of the invention, by limiting the opening width of the balance groove to be 0.1-0.2 times of the width between the adjacent pixel units, not only is the adverse effect of the overlarge opening width on the light-emitting area of the pixel units and the intensity of the pixel limiting layer prevented, but also the process difficulty is reduced compared with the balance groove with the overlarge opening width.
Fig. 3 is a schematic top view of a display panel according to another embodiment of the invention. The embodiment shown in fig. 3 is extended based on the embodiments shown in fig. 1a to 1c of the present invention, and the differences between the embodiment shown in fig. 3 and the embodiments shown in fig. 1a to 1c are emphasized below, and the descriptions of the same parts are omitted.
As shown in fig. 3, in the display panel provided by the embodiment of the present invention, the first surface of the pixel defining layer 2 further includes two second regions M2 divided based on the pixel grooves 21. Specifically, each of the second regions M2 is adjacent to the pixel groove 21, that is, each of the second regions M2 is disposed adjacent to the opening of the pixel groove 21, and each of the second regions M2 is a region of the first surface extending by a predetermined distance in a direction away from the pixel groove 21 with reference to the opening length of the pixel groove 21 on the side thereof. It should be understood that the specific size of the second region M2 may be determined according to practical situations, and embodiments of the present invention are not limited to this. Specifically, the second region M2 is a surface region of the first surface located on either side of a second extended side of the pixel groove 21, where the second extended side is the other opposite sides of the pixel groove 21, i.e., the upper and lower sides of the pixel groove 21 oriented as shown in fig. 3. In fig. 3, the second region M2 is the region of the first surface outlined within the dashed box M2. Each of the second regions M2 has a second groove face region of the pixel groove 21 adjacent thereto. In other words, the second groove face area is also located on the second extending side of the pixel groove 21 and is disposed adjacent to the second area M2.
In the embodiment of the present invention, the balance groove 22 penetrating the second region M2 of the pixel defining layer 2 also penetrates the second groove face region of the pixel groove 21 adjacent to the second region M2. It can be understood that the balancing groove 22 is correspondingly disposed at the opening edge of the four sides of the pixel groove 21. Note that, in order to ensure the stability of the pixel defining layer 2, the balance grooves 22 corresponding to the adjacent opening edges of the pixel groove 21 are not connected to each other through.
According to the display panel provided by the embodiment of the invention, the balance groove is arranged on the pixel limiting layer, and the balance groove is limited to penetrate through the first area of the first surface of the pixel limiting layer and the first groove surface area of the pixel groove, and also penetrate through the second area of the first surface of the pixel limiting layer and the second groove surface area of the pixel groove, so that the purpose of ensuring that the circumferential edges of the pixel units have reasonable edge thickness is achieved. Compared with the embodiments shown in fig. 1a to fig. 1c, the embodiments of the present invention can further improve the uniformity of the film layer of the pixel unit, thereby further ensuring the light emitting performance of the display device.
In an embodiment of the present invention, the ratio of the opening area of the balancing groove 22 in the second region M2 to the area of the second region M2 needs to be greater than the manufacturing precision of the balancing groove 22 and smaller than the pixel defining layer support collapse value of the second region M2. Preferably, the ratio of the opening area of the balancing groove 22 in the second region M2 to the area of the second region M2 ranges from 20% to 50%. It should be noted that, the ratio ranging from 20% to 50% can effectively improve the manufacturing efficiency of the display panel according to the embodiment of the present invention, and simultaneously improve the film uniformity of the pixel unit.
Fig. 4 is a schematic top view illustrating a display panel according to still another embodiment of the invention. The embodiment shown in fig. 4 is extended on the basis of the embodiments shown in fig. 1a to 1c of the present invention, and the differences between the embodiment shown in fig. 4 and the embodiments shown in fig. 1a to 1c are emphasized below, and the descriptions of the same parts are omitted.
As shown in fig. 4, in the display panel provided by the embodiment of the present invention, each balance groove 22 includes two sub-balance grooves 221 that are not connected to each other, and the two sub-balance grooves 221 are disposed along the opening edge of the pixel groove 21 on the side where the two sub-balance grooves are located.
It should be noted that the number of the sub balance grooves 221 included in each balance groove 22 may be set according to actual situations, and the embodiment of the present invention is not limited to this. Further, it should be appreciated that, because the sub-balancing slots 221 are relatively small in size, the sub-balancing slots 221 are more conducive to confining ink material within the sub-balancing slots 221. Based on this, compared with the embodiments shown in fig. 1a to fig. 1c, the display panel provided in the embodiment of the present invention further improves the film uniformity of the pixel unit by defining the balance groove to include a plurality of sub-balance grooves, and ensures the light emitting performance of the display device. And a non-through pixel limiting layer is arranged between every two adjacent sub-pixels, so that the whole structure is more stable.
Fig. 5 is a schematic top view illustrating a display panel according to still another embodiment of the invention. As shown in fig. 5, the display panel according to the embodiment of the present invention includes a substrate 1 having a rectangular plate shape and a pixel defining layer 2 stacked on the substrate 1. Wherein the pixel defining layer 2 includes a plurality of pixel grooves 21 penetrating the pixel defining layer 2 in the stacking direction (the front-rear direction of the orientation shown in fig. 5). Specifically, the pixel grooves 21 are rectangular through grooves, and a plurality of pixel grooves 21 form, with the substrate 1, a plurality of pixel containers capable of accommodating pixel units. In an embodiment of the present invention, the plurality of pixel containers are respectively used to accommodate different types of pixel units, such as a red pixel unit (R), a green pixel unit (G), and a blue pixel unit (B).
As shown with continued reference to fig. 5, the pixel defining layer 2 further includes a plurality of balance grooves 22 that are connected through the pixel grooves 21. Specifically, each balance groove 22 penetrates through two pixel containers capable of accommodating the same type of pixel unit, for example, a balance groove 22 penetrates through two pixel containers capable of accommodating a red pixel unit.
It should be noted that, after the pixel containers for accommodating the same type of pixel units are communicated by the balance groove 22, the flow capacity of the ink material can be effectively improved, and thus, the purpose of improving the uniformity of the film layer of the pixel units and ensuring the light emitting performance of the display device is finally achieved.
Fig. 6a is a schematic top view illustrating a display panel according to still another embodiment of the invention. Fig. 6b is a schematic front view illustrating a display panel according to still another embodiment of the present invention. Specifically, FIG. 6B is a schematic cross-sectional view taken along section line B-B of FIG. 6 a. The embodiment shown in fig. 6a and 6b is extended based on the embodiment shown in fig. 5 of the present invention, and the differences between the embodiment shown in fig. 6a and 6b and the embodiment shown in fig. 5 will be emphasized below, and the descriptions of the same parts will not be repeated.
As shown in fig. 6a and 6b, in the display panel according to the embodiment of the present invention, the balance groove 22 is located in the inner region of the pixel defining layer 2. That is, the balance groove 22 does not penetrate the first and second surfaces of the pixel defining layer 2 (the upper and lower surfaces of the pixel defining layer in the orientation shown in fig. 6 b).
According to the display panel provided by the embodiment of the invention, the balance groove is arranged in the inner area of the pixel limiting layer, so that the adverse effect of the balance groove on other structures adjacent to the pixel limiting layer is effectively avoided. For example, the adverse effect of the ink material carried in the balance groove on the normal display of the display panel can be effectively avoided.
Fig. 7 is a schematic top view illustrating a display panel according to still another embodiment of the invention. The embodiment shown in fig. 7 is extended based on the embodiment shown in fig. 5 of the present invention, and the differences between the embodiment shown in fig. 7 and the embodiment shown in fig. 5 will be emphasized below, and the descriptions of the same parts will not be repeated.
Specifically, fig. 7 is a partial schematic view of the display panel. As shown in fig. 7, in the display panel provided by the embodiment of the present invention, each of the balance grooves 22 connects at least three pixel containers capable of accommodating the same type of pixel units.
Since the embodiment of the present invention uses the balance groove 22 to connect at least three pixel containers capable of accommodating the same type of pixel units together, compared with the embodiment shown in fig. 5, the embodiment of the present invention can further improve the flowing capability of the ink material, thereby further improving the film uniformity of the pixel units.
In an embodiment of the present invention, a display device is also provided. The display device includes an electronic device and a display panel in signal connection with the electronic device, wherein the electronic device may include an electronic device such as a sensor and a controller, and the display panel may be the display panel mentioned in the above embodiments. It should be understood that the display device includes, but is not limited to, a mobile phone, a tablet computer, a notebook, etc.
Fig. 8 is a schematic flow chart illustrating a method for manufacturing a display panel according to an embodiment of the invention. As shown in fig. 8, the method for manufacturing a display panel according to an embodiment of the present invention includes the following steps.
Step S10: a substrate is prepared.
Step S20: a pixel defining layer including a pixel groove and a balance groove is prepared on a substrate, wherein the pixel groove penetrates through a first surface and a second surface opposite to the first surface of the pixel defining layer, and the balance groove is connected to the pixel groove.
Alternatively, the preparation of the pixel grooves and the balance grooves may be performed based on an etching process.
In a practical application process, a substrate is prepared, and then a pixel defining layer including a pixel groove and a balance groove is prepared on the substrate, wherein the pixel groove penetrates through a first surface and a second surface opposite to the first surface of the pixel defining layer, and the balance groove is connected with the pixel groove in a penetrating manner.
According to the preparation method of the display panel, the balance groove communicated with the pixel groove is arranged on the pixel limiting layer, based on the effect of the balance groove on limiting the ink material and the effect of increasing the containing space of the pixel container, the reasonable edge thickness of the pixel unit injected into the pixel limiting layer is effectively ensured, the phenomenon that the edge thickness of the pixel unit is too small is prevented, the film layer uniformity of the pixel unit is improved, and the luminous performance of the display device is ensured.
It should be understood that, in the embodiment of the present invention, when the dummy trench located in the inner region of the pixel defining layer mentioned in the embodiment shown in fig. 6a and 6b is prepared on the pixel defining layer, the dummy trench may be prepared on the basis of a layered etching method. For example, a first pixel defining substrate layer is first prepared, a first through groove corresponding to a pixel groove and a first sub-groove corresponding to a balance groove are etched on the first pixel defining substrate layer, a sacrificial layer is filled in the first sub-groove, a second pixel defining substrate layer is prepared on the first pixel defining substrate layer filled with the sacrificial layer, a second through groove corresponding to the pixel groove is etched on the second pixel defining substrate layer, wherein the first through groove and the second through groove together form the pixel groove, and finally the sacrificial layer is removed, and a space region after the sacrificial layer is removed becomes the balance groove. The material of the sacrificial layer may be determined based on actual conditions, as long as the material is capable of forming an etching cavity, which is not uniformly limited in the embodiment of the present invention.
In another embodiment of the present invention, the display panel manufacturing method further includes manufacturing a pixel unit layer including pixel units based on an inkjet printing method, wherein the pixel units are located in the corresponding pixel grooves and the balance grooves.
In practical application, a substrate is prepared, a pixel defining layer comprising a pixel groove and a balance groove is prepared on the substrate, wherein the pixel groove penetrates through a first surface and a second surface opposite to the first surface of the pixel defining layer, the balance groove is communicated with the pixel groove, and a pixel unit layer comprising a pixel unit is prepared based on an ink jet printing method, wherein the pixel unit is positioned in the corresponding pixel groove and the balance groove.
The preparation method of the display panel provided by the embodiment of the invention effectively improves the flatness of the pixel unit prepared based on the ink-jet printing method, prevents the situation that the edge thickness of the pixel unit is too small, further improves the film uniformity of the pixel unit and ensures the luminous performance of the display device.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (11)
1. A display panel, comprising:
a substrate; and
a pixel defining layer disposed on the substrate, the pixel defining layer including a pixel groove and an equilibrium groove, wherein the pixel groove penetrates a first surface of the pixel defining layer and a second surface opposite to the first surface, the equilibrium groove is connected to the pixel groove, the equilibrium groove is capable of confining an ink material flowed therein within the equilibrium groove, the first surface includes a first region, the pixel groove includes a first groove face region adjacent to the first region, the equilibrium groove penetrates the first groove face region, and the equilibrium groove further penetrates the first region.
2. The display panel of claim 1, wherein the first surface includes a second region, the pixel well includes a second well face region adjoining the second region, and the balance well extends through the second well face region.
3. The display panel of claim 2, wherein the balancing groove further penetrates the second region.
4. The display panel according to claim 1, wherein a ratio of an opening area of the balance groove in the first region to an area of the first region is larger than a manufacturing precision value of the balance groove and smaller than a pixel defining layer support collapse value of the first region.
5. The display panel according to claim 4, wherein a ratio of an opening area of the balance groove in the first region to an area of the first region is in a range of 20% to 50%.
6. The display panel according to claim 1, wherein the number of the pixel grooves is plural, and the balance groove penetrates at least two of the pixel grooves capable of accommodating pixel units of a same type.
7. The display panel of claim 6, wherein the balance groove does not penetrate the first surface and the second surface of the pixel defining layer.
8. The display panel according to any one of claims 1 to 7, further comprising a pixel unit layer including pixel units prepared based on an inkjet printing method, the pixel units being filled in the corresponding pixel grooves and the balance grooves.
9. A display device, comprising:
an electronic device; and
a display panel as claimed in any one of claims 1 to 8 in signal connection with said electronic device.
10. A method for manufacturing a display panel includes:
preparing a substrate; and
preparing a pixel defining layer including a pixel groove and an equilibrium groove on the substrate, wherein the pixel groove penetrates through a first surface of the pixel defining layer and a second surface opposite to the first surface, the equilibrium groove is connected with the pixel groove in a penetrating mode, the equilibrium groove can limit ink material flowing into the equilibrium groove in the equilibrium groove, the first surface comprises a first area, the pixel groove comprises a first groove surface area adjacent to the first area, the equilibrium groove penetrates through the first groove surface area, and the equilibrium groove further penetrates through the first area.
11. The method for manufacturing a display panel according to claim 10, further comprising:
preparing a pixel unit layer including pixel units based on an inkjet printing method, wherein the pixel units are filled in the corresponding pixel grooves and the balance grooves.
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| CN104299968A (en) * | 2014-09-22 | 2015-01-21 | 京东方科技集团股份有限公司 | Electroluminescent device, manufacturing method of electroluminescent device, display substrate and display device |
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| CN103311269A (en) * | 2013-05-29 | 2013-09-18 | 京东方科技集团股份有限公司 | OLED (organic light emitting diode) pixel limit structure and manufacturing method thereof |
| CN104299968A (en) * | 2014-09-22 | 2015-01-21 | 京东方科技集团股份有限公司 | Electroluminescent device, manufacturing method of electroluminescent device, display substrate and display device |
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