CN119136587B - Display panel and display device - Google Patents
Display panel and display deviceInfo
- Publication number
- CN119136587B CN119136587B CN202411217761.2A CN202411217761A CN119136587B CN 119136587 B CN119136587 B CN 119136587B CN 202411217761 A CN202411217761 A CN 202411217761A CN 119136587 B CN119136587 B CN 119136587B
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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
- H10K59/80—Constructional details
- H10K59/805—Electrodes
- H10K59/8052—Cathodes
- H10K59/80521—Cathodes characterised by their shape
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- Microelectronics & Electronic Packaging (AREA)
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Abstract
本申请提供了一种显示面板及显示装置，该显示面板包括基板、第一电极层、像素定义层、隔离结构、发光层以及第二电极层，隔离结构设于像素定义层的非开口区，发光层设于像素定义层上且覆盖隔离结构，第二电极层设于发光层远离像素定义层的一侧；通过设置第二电极层在隔离结构处连续设置，隔离结构包括分离设置的第一隔离部和第二隔离部，发光层在第一隔离部所在的位置连续设置，发光层在第二隔离部所在的位置断开设置，从而有效改善因像素偷亮而造成的显示不良；同时，还能保证第二电极层与发光层在第一隔离部处具有良好的电接触，确保了信号的正常传输，从而有效降低了第二电极层阻抗，降低了显示面板的功耗。
The present application provides a display panel and a display device, wherein the display panel includes a substrate, a first electrode layer, a pixel definition layer, an isolation structure, a light-emitting layer and a second electrode layer, wherein the isolation structure is arranged in a non-opening area of the pixel definition layer, the light-emitting layer is arranged on the pixel definition layer and covers the isolation structure, and the second electrode layer is arranged on a side of the light-emitting layer away from the pixel definition layer; by arranging the second electrode layer to be continuously arranged at the isolation structure, the isolation structure includes a first isolation part and a second isolation part that are separately arranged, the light-emitting layer is continuously arranged at the position where the first isolation part is located, and the light-emitting layer is disconnected at the position where the second isolation part is located, thereby effectively improving the poor display caused by pixel stealing; at the same time, it can also ensure that the second electrode layer and the light-emitting layer have good electrical contact at the first isolation part, ensuring the normal transmission of the signal, thereby effectively reducing the impedance of the second electrode layer and reducing the power consumption of the display panel.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
In order to further improve the efficiency and life of the OLED device, a stacked Light Emitting technology (Tandem) has been developed, in which a multi-layer structure is generally constructed using different Light Emitting materials and structures, each layer being capable of Emitting Light of a specific wavelength, which can be combined together by proper design and control to form a more bright and rich color representation.
At present, a charge generation layer (Charge Generation Layer, CGL) is often added in a stacked organic light emitting diode device to improve the performance of the device, but the charge generation layer has strong charge generation and separation capability, has strong self conductivity, is easy to accidentally excite other colors by pixels which should not be bright when only one color is lightened, influences the display effect, generally avoids the phenomenon of lighting between adjacent pixels by cutting off the whole light emitting layer, but when the light emitting layer is cut off, the electric contact between a cathode and the light emitting layer is interrupted, and a cathode signal cannot be normally transmitted, so that the cathode impedance is increased, and the power consumption of the device is increased.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, which are used for relieving the defects in the related art.
In order to achieve the above functions, the technical solution provided by the embodiment of the present application is as follows:
an embodiment of the present application provides a display panel including:
A substrate;
A first electrode layer provided on one side of the substrate;
the pixel definition layer is arranged on one side of the substrate and comprises pixel opening areas and non-opening areas arranged between two adjacent pixel opening areas;
the isolation structure is arranged on one side, far away from the substrate, of the pixel definition layer and is positioned in the non-opening area;
the light-emitting layer is arranged on the pixel definition layer and covers the isolation structure;
the second electrode layer is arranged on one side of the light-emitting layer, which is far away from the pixel definition layer, and the second electrode layer is continuously arranged at the isolation structure;
the isolation structure comprises a first isolation part and a second isolation part which are arranged in a separated mode, the light-emitting layer is arranged continuously at the position where the first isolation part is located, and the light-emitting layer is arranged in a disconnected mode at the position where the second isolation part is located.
Optionally, in an embodiment, a width of the first isolation portion on a side away from the substrate is greater than a width of the first isolation portion on a side close to the substrate, and a width of the second isolation portion on a side away from the substrate is smaller than a width of the second isolation portion on a side close to the substrate.
Optionally, in an embodiment, the width of the first isolation portion gradually decreases and the width of the second isolation portion gradually increases in a direction in which the substrate points to the isolation structure.
Optionally, in an embodiment, in a direction perpendicular to the substrate, a shape of the first isolation portion cross section is a positive trapezoid, and a shape of the second isolation portion cross section is an inverted trapezoid.
Optionally, in an embodiment, the first isolation portion includes a first side surface and a first bottom surface, where the first bottom surface is located on a side of the first isolation portion near the substrate, and a first included angle is formed between the first side surface and the first bottom surface;
the second isolation part comprises a second side surface and a second bottom surface, the second bottom surface is positioned at one side of the second isolation part close to the substrate, and a second included angle is formed between the second side surface and the second bottom surface;
The range of the first included angle is larger than or equal to 55 degrees and smaller than or equal to 75 degrees, and the range of the second included angle is larger than or equal to 100 degrees and smaller than or equal to 120 degrees.
Optionally, in an embodiment, a distance between a side of the first isolation portion away from the pixel defining layer and the pixel defining layer is greater than or equal to 1.2 microns and less than or equal to 1.8 microns, and a distance between a side of the second isolation portion away from the pixel defining layer and the pixel defining layer is greater than or equal to 1 micron and less than or equal to 2 microns.
Optionally, in an embodiment, the display panel includes a plurality of sub-pixels and a plurality of the isolation structures;
The first isolation part is positioned at one side of the second isolation part away from the sub-pixel, or the first isolation part is positioned at one side of the second isolation part close to the sub-pixel.
Optionally, in an embodiment, the display panel includes a plurality of first sub-pixels displaying a first color, a plurality of second sub-pixels displaying a second color, and a plurality of third sub-pixels displaying a third color, where the first color, the second color, and the third color are all different;
The isolation structures are arranged around one first sub-pixel, and the first isolation part is positioned at one side of the second isolation part close to the first sub-pixel;
the isolation structures are arranged around the second sub-pixel, and the first isolation part is positioned at one side of the second isolation part away from the second sub-pixel;
the isolation structures are arranged around the third sub-pixel, and the first isolation part is positioned at one side of the second isolation part close to the third sub-pixel;
wherein the luminous efficiency of the second sub-pixel is larger than the luminous efficiency of any one of the first sub-pixel and the third sub-pixel.
Alternatively, in an embodiment, the light emitting layer includes a first light emitting portion, a charge generating layer, and a second light emitting portion that are stacked;
The first light-emitting part, the charge generation layer and the second light-emitting part are all arranged continuously at the position where the first isolation part is located, and the first light-emitting part, the charge generation layer and the second light-emitting part are all arranged in a disconnected mode at the position where the second isolation part is located.
The embodiment of the application provides a display device which comprises any one of the display panels.
The display panel comprises a substrate, a first electrode layer, a pixel definition layer, an isolation structure, a light-emitting layer and a second electrode layer, wherein the second electrode layer is arranged at the isolation structure continuously, the isolation structure comprises a first isolation part and a second isolation part which are arranged in an isolated mode, the light-emitting layer is arranged at the position of the first isolation part continuously, the light-emitting layer is disconnected at the second isolation part, and therefore poor display caused by pixel illumination is effectively improved, good electrical contact between the second electrode layer and the light-emitting layer at the first isolation part is guaranteed, normal transmission of signals is guaranteed, impedance of the second electrode layer is effectively reduced, and power consumption of the display panel is reduced.
Drawings
The technical solution and other advantageous effects of the present invention will be made apparent by the following detailed description of the specific embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application;
FIG. 2 is a schematic view of a first enlarged structure shown in FIG. 1A according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a structure of a display panel according to the related art;
FIG. 4 is a schematic diagram of a second enlarged structure shown in FIG. 1A according to an embodiment of the present application;
FIG. 5 is a schematic view of another structure of a display panel according to the related art;
Fig. 6 is an equivalent circuit diagram of a light emitting device in the related art;
Fig. 7 is another equivalent circuit diagram of a light emitting device in the related art;
FIG. 8 is a schematic structural diagram of an isolation structure according to an embodiment of the present application;
FIG. 9 is a schematic top view of a display panel according to an embodiment of the application;
Fig. 10 is a schematic structural diagram of a display device according to an embodiment of the application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the application. In the present application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower directions of the device in actual use or operation, particularly the directions of the drawing figures, while "inner" and "outer" are used with respect to the outline of the device.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only, and features defining "first," "second," and the like may explicitly or implicitly include one or more of the recited features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, mechanically connected, electrically connected, or in communication with each other, directly connected, indirectly connected via an intermediate medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The following disclosure provides many different embodiments for implementing different configurations of the application. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the application. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
The embodiment of the application provides a display panel and a display device. The following will describe in detail. The following description of the embodiments is not intended to limit the preferred embodiments.
Fig. 1 and fig. 2 are schematic views of a display panel according to an embodiment of the application, and fig. 2 is a schematic view of a first enlarged structure at a in fig. 1 according to an embodiment of the application.
In an embodiment, the display panel 1 may be an Organic light-emitting diode (OLED) display panel, and the display panel 1 includes a substrate 11, a pixel defining layer 12, an isolation structure 13, and a light-emitting device layer 14.
The substrate 11 may be an array substrate, the substrate 11 includes a first substrate 111, a first shielding layer 112, a second substrate 113, a second shielding layer 114, and a driving circuit layer 115 that are stacked, where each of the first substrate 111 and the second substrate 113 may include one of a rigid substrate or a flexible substrate, when each of the first substrate 111 and the second substrate 113 is a rigid substrate, a material may be metal or glass, and when each of the first substrate 111 and the second substrate 113 is a flexible substrate, a material may include at least one of an acrylic resin, a methacrylic resin, a polyisoprene, a vinyl resin, an epoxy resin, a polyurethane resin, a cellulose resin, a silicone resin, a polyimide resin, and a polyamide resin, which is not particularly limited in this embodiment.
The driving circuit layer 115 includes a buffer layer 1151 disposed on the second shielding layer 114, a first gate insulating layer 1152 disposed on the buffer layer 1151, a second gate insulating layer 1153 disposed on the first gate insulating layer 1152, an interlayer insulating layer 1154 disposed on the second gate insulating layer 1153, a first planarization layer 1155 disposed on the interlayer insulating layer 1154, and a second planarization layer 1156 disposed on the first planarization layer 1155, wherein the pixel defining layer 12 is disposed on a side of the second planarization layer 1156 away from the first planarization layer 1155.
The driving circuit layer 115 further includes a thin film transistor 1157, the thin film transistor 1157 includes an active layer, a first gate, a second gate, a source and a drain, the active layer is disposed between the buffer layer 1151 and the first gate insulating layer 1152, the first gate is disposed between the first gate insulating layer 1152 and the second gate insulating layer 1153, the second gate is disposed between the second gate insulating layer 1153 and the first flat layer 1155, the source and the drain are disposed between the interlayer insulating layer 1154 and the first flat layer 1155, wherein the driving circuit layer 115 further includes a patch cord disposed on the first organic flat layer far from the interlayer insulating layer 1154 and overlapping with the drain, and the patch cord is used for connecting the drain with the light emitting device layer 14 to realize signal transmission.
The pixel defining layer 12 is disposed on a side of the second planarization layer 1156 away from the first planarization layer 1155, the pixel defining layer 12 includes a pixel opening 121 region 1201 and a non-opening region 1202 disposed between two adjacent pixel opening 121 regions 1201, the non-opening region 1202 is disposed on at least one side of the pixel opening 121 region 1201, for example, the non-opening region 1202 is disposed between two adjacent pixel opening 121 regions 1201, the non-opening region 1202 may be disposed around the pixel opening 121 region 1201, specifically, the pixel defining layer 12 includes a plurality of pixel openings 121, the pixel openings 121 are correspondingly disposed in the pixel opening 121 region 1201 of the pixel defining layer 12, and the pixel opening 121 region 1201 corresponding to the pixel opening 121 may be a light-emitting pixel region of the display panel 1, so as to implement display of the panel by disposing pixels of different colors in different pixel openings 121.
The isolation structure 13 is disposed on a side of the pixel defining layer 12 away from the substrate 11, and the isolation structure 13 is disposed in the non-opening area 1202.
The light-emitting device layer 14 includes a first electrode layer 141, a light-emitting layer 142 and a second electrode layer 143, wherein the first electrode layer 141 is disposed between the second flat layer 1156 and the pixel defining layer 12, the first electrode layer 141 includes a plurality of first electrodes 1411, one of the first electrodes 1411 is disposed corresponding to one of the pixel openings 121, and at least a portion of the first electrodes 1411 is exposed in the pixel opening 121, the first electrode layer 141 may be an anode layer, the first electrode 1411 may be an anode, the first electrode 1411 may be connected with the drain electrode, the light-emitting layer 142 is disposed on the pixel defining layer 12 and covers the isolation structure 13, the light-emitting layer 142 is disposed on the first electrode 1411 and at least a portion of the light-emitting layer 142 is disposed in the pixel opening 121, the second electrode layer 143 may be a cathode layer, the second electrode layer 143 is disposed on a side of the light-emitting layer 142 away from the first electrode layer 141, and the second electrode layer 143 is a continuous isolation structure.
The isolation structure 13 includes a first isolation portion 131 and a second isolation portion 132 that are separately disposed, the light emitting layer 142 is continuously disposed at a position where the first isolation portion 131 is located, and the light emitting layer 142 is disconnected at a position where the second isolation portion 132 is located.
Fig. 2 and 3 are combined, wherein fig. 3 is a schematic structural diagram of a display panel in the related art, in the related design, the display panel 2 includes a substrate 21, and a pixel defining layer 22 and a light emitting device layer 23 stacked on the substrate 21, the light emitting device layer 23 includes an anode 231, a light emitting layer 232 and a cathode 233 stacked, and in order to avoid the phenomenon of light stealing between adjacent pixels, in the related design, by disposing a barrier layer 24 in a non-opening portion of the pixel defining layer 22, the barrier layer 24 may include a first barrier portion 241 and a second barrier portion 242, and the light emitting layer 232 is disconnected in both the first barrier portion 241 and the second barrier portion 242, so as to prevent charges in adjacent pixels from flowing laterally into another pixel.
As can be seen from fig. 2 and 3, in the display panel 2, since the light emitting layer 232 is disconnected at both the first blocking portion 241 and the second blocking portion 242, the cathode signal is blocked at both the first blocking portion 241 and the second blocking portion 242, so that the electric charges need to pass through a larger resistance path during the lateral transmission, the impedance of the cathode 233 is increased, and a higher cathode impedance means that a larger driving voltage is needed to achieve the required brightness, thereby increasing the power consumption of the whole screen.
It can be understood that, in this embodiment, the second electrode layer 143 is disposed continuously at the isolation structure 13, the isolation structure 13 includes a first isolation portion 131 and a second isolation portion 132 that are separately disposed, and the light emitting layer 142 is disposed continuously at a position where the first isolation portion 131 is disposed, so that an electric signal can be transmitted laterally at the first isolation portion 131, a lower impedance path is maintained, a voltage when a driving current passes through the second electrode layer 143 is reduced, and thus the overall power consumption of the display panel 1 is reduced, and by disposing the light emitting layer 142 at a position where the second isolation portion 132 is disposed, a charge transmission path between adjacent pixels can be isolated, and further a cross-pixel bright phenomenon is avoided.
Fig. 4 is a schematic diagram of a second enlarged structure at a in fig. 1 according to an embodiment of the present application.
In one embodiment, the light emitting layer 142 includes a first light emitting portion 1421, a charge generating layer 1422, and a second light emitting portion 1423 that are stacked, wherein the first light emitting portion 1421, the charge generating layer 1422, and the second light emitting portion 1423 are all continuously disposed at the position of the first isolation portion 131, and the first light emitting portion 1421, the charge generating layer 1422, and the second light emitting portion 1423 are all disconnected at the position of the second isolation portion 132.
It should be noted that, in order to further improve the efficiency and lifetime of the OLED device, a stacked light emitting technology (Tandem) is developed, and fig. 5,6 and 7 are combined, wherein fig. 5 is another schematic structural diagram of a display panel in the related art, fig. 6 is an equivalent circuit diagram of the light emitting device in the related art, and fig. 7 is another equivalent circuit diagram of the light emitting device in the related art.
In the related art, the display panel 3 may be an OLED light emitting device, and the display panel 3 includes an anode 31, a hole transport layer 32, a first light emitting layer 33, an n-type charge generation layer 34, a p-type charge generation layer 35, a second light emitting layer 36, and a cathode 37 which are stacked, and since the n-type charge generation layer 34 has strong electron generation and separation capability, a bright-stealing phenomenon is easily caused between adjacent pixels, an undercut structure is often used in the related art to cut off the n-type charge generation layer 34 between adjacent pixels, so as to reduce the probability of bright-stealing, but the cut-off process also easily causes a short circuit between the n-type charge generation layer 34 and the cathode 37, which affects the display effect of the display panel 1.
It can be appreciated that, in this embodiment, by disposing the first light emitting portion 1421, the charge generating layer 1422, and the second light emitting portion 1423 continuously disposed at the position of the first isolation portion 131, and disposing the second electrode layer 143 continuously disposed at the isolation structure 13, the continuity of the light emitting layer 142 at the position of the first isolation portion 131 is ensured, the electrical contact between the second electrode layer 143 and the light emitting layer 142 at the position of the first isolation portion 131 is good, and the second electrode layer 143 and the charge generating layer 1422 are not in contact at the position of the first isolation portion 131, so that the short circuit between the charge generating layer 1422 and the second electrode layer 143 is avoided, and the display effect of the display panel 1 is improved.
Fig. 1, fig. 2 and fig. 8 are combined, wherein fig. 8 is a schematic structural diagram of an isolation structure according to an embodiment of the present application;
In an embodiment, the width of the first isolation portion 131 away from the substrate 11 is greater than the width of the first isolation portion 131 near the substrate 11, and the width of the second isolation portion 132 away from the substrate 11 is smaller than the width of the second isolation portion 132 near the substrate 11.
Specifically, in the direction that the substrate 11 points to the isolation structure 13, the width of the first isolation portion 131 gradually decreases, the cross section of the first isolation portion 131 is in a structure with a narrower top and a wider bottom, the risk of breaking the light emitting layer 142 can be reduced by a narrower top design, the light emitting layer 142 can more easily span a narrower portion and is not easily broken, continuity of the light emitting layer 142 at the position of the first isolation portion 131 is facilitated to be ensured, electrical contact between the second electrode layer 143 and the light emitting layer 142 at the position of the first isolation portion 131 is facilitated to be good, impedance of the second electrode layer 143 is reduced, power consumption of the display panel 1 is optimized, and meanwhile, the wider bottom design enables the first isolation portion 131 to have better structural support on the pixel defining layer 12, and stability of the structure is facilitated to be improved.
In the direction of the substrate 11 pointing to the isolation structure 13, the width of the second isolation portion 132 is gradually increased, and the cross section of the second isolation portion 132 is in a structure with a wider top and a narrower bottom, so that the second isolation portion 132 has a wider surface area at the top thereof, thereby more effectively blocking the continuity of the light-emitting layer 142 at the position of the second isolation portion 132, helping to ensure that the light-emitting layer 142 is disconnected at the position of the second isolation portion 132, further effectively enhancing the isolation effect on the lateral charges, and further reducing the bright-stealing phenomenon across pixels.
With continued reference to fig. 1, 2 and 8, in one embodiment, the cross-sectional shape of the first isolation portion 131 includes, but is not limited to, a positive trapezoid, and the cross-sectional shape of the second isolation portion 132 includes, but is not limited to, an inverted trapezoid, in a direction perpendicular to the substrate 11.
Specifically, the light emitting layer 142 is disposed on the pixel defining layer 12 and covers the isolation structure 13, that is, during the process of fabricating the display panel 1, the isolation structure 13 is fabricated first and then the light emitting layer 142 is fabricated, the first isolation portion 131 includes a first side surface 1311, a first bottom surface 1312, and a first top surface 1313, the first bottom surface 1312 is located on a side of the first isolation portion 131 near the substrate 11, and the first top surface 1313 is located on a side of the first isolation portion 131 far from the substrate 11.
It can be appreciated that, in this embodiment, by being disposed in a direction perpendicular to the substrate 11, the shape of the cross section of the first isolation portion 131 includes, but is not limited to, a positive trapezoid, so that the light emitting layer 142 can be well deposited at the corresponding position of the first side surface 1311 and the first top surface 1313 of the first isolation portion 131, and a phenomenon of local excessive thinning or breaking does not occur, so that the reliability of continuous disposition of the light emitting layer 142 at the position of the first isolation portion 131 can be ensured.
The second isolation portion 132 includes a second side surface 1321, a second bottom surface 1322, and a second top surface 1323, the second bottom surface 1322 is located on a side of the second isolation portion 132 near the substrate 11, and the second top surface 1323 is located on a side of the first isolation portion 131 away from the substrate 11.
It can be appreciated that, in this embodiment, by being disposed in a direction perpendicular to the substrate 11, the shape of the cross section of the second isolation portion 132 includes, but is not limited to, an inverted trapezoid, and then the light emitting layer 142 can be deposited only at a position corresponding to the second top surface 1323 of the second isolation portion 132, that is, the light emitting layer 142 is disconnected at the connection between the second side surface 1321 and the first top surface 1313, thereby ensuring that the light emitting layer 142 is disconnected at the second isolation portion 132, and effectively preventing a charge transmission path between adjacent pixels through physical isolation.
With continued reference to fig. 1,2 and 8, in one embodiment, a first angle α is formed between the first side surface 1311 and the first bottom surface 1312, the first angle α is an acute angle, and a second angle β is formed between the second side surface 1321 and the second bottom surface 1322, and the second angle β is an obtuse angle.
Specifically, the first included angle α may be a slope angle of the first side surface 1311 of the first isolation portion 131, where the range of the first included angle α is greater than or equal to 55 degrees and less than or equal to 75 degrees, and it is understood that in this embodiment, the first included angle α is an acute angle, and by controlling the magnitude of the first included angle α, the first side surface 1311 may be inclined or steeper, so that the luminescent material may better extend along the first side surface 1311 during deposition, so that the luminescent material is less pushed onto the first side surface 1311, and the phenomenon that the luminescent layer 142 is locally thinned or broken at the edge or sharp transition of the first isolation portion 131 is avoided.
It can be appreciated that, in this embodiment, the second included angle β is an obtuse angle, and by controlling the size of the second included angle β, the width of the second top surface 1323 can be controlled, and further, the size of the second isolation portion 132 corresponding to the disconnected area of the light emitting layer 142 can be controlled, so that a more effective isolation structure 13 can be formed, and further, lateral diffusion of charges can be prevented.
With continued reference to fig. 2 and 8, in one embodiment, a distance H1 between a side of the first isolation portion 131 away from the pixel defining layer 12 and the pixel defining layer 12 is greater than or equal to 1.2 microns and less than or equal to 1.8 microns, a distance H2 between a side of the second isolation portion 132 away from the pixel defining layer 12 and the pixel defining layer 12 is greater than or equal to 1 micron and less than or equal to 2 microns, and a distance H2 between a side of the second isolation portion 132 away from the pixel defining layer 12 and the pixel defining layer 12 is greater than or equal to a distance H1 between a side of the first isolation portion 131 away from the pixel defining layer 12 and the pixel defining layer 12, thereby enhancing an ability of the second isolation portion 132 to block the light emitting layer 14.
In the present embodiment, the light emitting layer 142 is disposed continuously at the position of the first isolation portion 131, and the first isolation portion 131 has the first angle α between the first side surface 1311 and the first bottom surface 1312, so that the path along which the first isolation portion 131 can extend is set to 2× (H1/tan (α)), compared to the case where the isolation structure 13 is not disposed.
Wherein H1 is the thickness of the first isolation portion 131, α is a first angle α between the first side surface 1311 and the first bottom surface 1312 of the first isolation portion 131, and in this embodiment, the technical solution of the present application is illustrated by taking the thickness of the first isolation portion 131 as 1.5 micrometers and the first angle α between the first side surface 1311 and the first bottom surface 1312 of the first isolation portion 131 as 65 degrees, that is, the path along which the first isolation portion 131 can extend is 2× (1.5/tan (65 °) =1.5 micrometers.
It can be understood that, in this embodiment, the second electrode layer 143 is continuously disposed at the isolation structure 13, the isolation structure 13 includes a first isolation portion 131 and a second isolation portion 132 that are separately disposed, and the light emitting layer 142 is continuously disposed at a position where the first isolation portion 131 is located, so that a transmission path of charges of the light emitting layer 142 at the position where the first isolation portion 131 is located is prolonged, and an effect of blocking lateral charge transmission is achieved.
Meanwhile, by disposing the first isolation portion 131 on the side of the pixel defining layer 12 away from the substrate 11, and disposing the first isolation portion 131 in the non-opening area 1202, the width of the non-opening area 12 may be changed by controlling the width of the first isolation portion 131, so as to adjust the pixel density of the display panel 1, for example, increasing the PDL Gap of the WQ level with high resolution to fhd+, or reducing the width (Gap) of the non-opening area 1202 of the pixel defining layer 12 from the design standard of the WQ resolution to the design standard of the fhd+ resolution, or reducing the width (Gap) of the non-opening area 1202 of the pixel defining layer 12 from the design standard of the fhd+ resolution to the design standard of the FHD resolution, which is helpful for reducing the pixel density, reducing the manufacturing cost and difficulty, and improving the crosstalk and light leakage between two adjacent pixels.
Fig. 9 is a schematic top view of a display panel according to an embodiment of the application.
In an embodiment, the display panel 1 includes a plurality of sub-pixels 15 and a plurality of isolation structures 13, wherein the plurality of isolation structures 13 are disposed around at least one sub-pixel 15, and the plurality of isolation structures 13 are disposed in one sub-pixel 15 corresponding to the sub-pixel, and the first isolation portion 131 is located on a side of the second isolation portion 132 away from the sub-pixel 15, or the first isolation portion 131 is located on a side of the second isolation portion 132 close to the sub-pixel 15, so as to reduce a lateral leakage phenomenon, that is, charges unnecessarily flow into a pixel area that should not be bright, thereby improving accuracy and stability of display, and meanwhile, by disposing the first isolation portion 131, good electrical contact between the second electrode layer 143 and the light emitting layer 142 can be ensured, thereby reducing impedance of the second electrode layer 143 and improving luminous efficiency of the display panel 1.
The isolation structures 13 may be disposed on a plurality of adjacent virtual quadrilaterals 16 and arranged in a honeycomb lattice, where each isolation structure 13 is disposed at a vertex position of the virtual quadrilaterals 16, and at least one sub-pixel 15 is correspondingly disposed at a center position of one virtual quadrilaterals 16.
Specifically, the display panel 1 includes a plurality of first sub-pixels 151 displaying a first color, a plurality of second sub-pixels 152 displaying a second color, and a plurality of third sub-pixels 153 displaying a third color, where the first color, the second color, and the third color are different, and the technical solution of the present application is illustrated by taking the first color as red, the second color as green, and the third color as blue as an example.
The isolation structures 13 are arranged around the first sub-pixel 151, the first isolation part 131 is arranged on one side of the second isolation part 132 close to the first sub-pixel 151, the isolation structures 13 are arranged around the second sub-pixel 152, the first isolation part 131 is arranged on one side of the second isolation part 132 away from the second sub-pixel 152, the isolation structures 13 are arranged around the third sub-pixel 153, the first isolation part 131 is arranged on one side of the second isolation part 132 close to the third sub-pixel 153, and the luminous efficiency of the second sub-pixel 152 is larger than that of any one of the first sub-pixel 151 and the third sub-pixel 153.
It will be appreciated that, since the light emitting efficiency of the second sub-pixel 152 is greater than that of any one of the first sub-pixel 151 and the third sub-pixel 153, by disposing the first isolation portion 131 at a position close to the high-efficiency sub-pixel 15 (the second sub-pixel 152), the flow of charges and light can be better controlled, the light emission of the high-efficiency sub-pixel 15 is reduced, and the overall display brightness is balanced, while disposing the first isolation portion 131 at a position far from the low-efficiency sub-pixel 15 (such as the first sub-pixel 151 and the third sub-pixel 153) can increase the luminous flux of these regions, compensate the lower light emitting efficiency, and achieve the overall brightness balance, that is, the embodiment can make the brightness and the color of the whole panel more uniform by adjusting the light emitting amount and the efficiency of each color sub-pixel 15, and avoid the display non-uniformity caused by the difference of the light emitting efficiencies of the sub-pixels 15 of different colors.
Fig. 10 is a schematic structural diagram of a display device according to an embodiment of the application.
The embodiment also provides a display device 4, where the display device 4 includes a terminal body 4A and a display panel 1, and the terminal body 4A is combined with the display panel 1 into a whole, and the display panel 1 may be a display panel as described in any of the foregoing embodiments.
It will be appreciated that the display panel 1 has been described in detail in the above embodiments and will not be repeated here, and the terminal body 4A may include a middle frame integrally combined with the display panel to provide support fixing and protection for the display panel.
In a specific application, the display device may be at least one device with a display function, such as a smart phone, a tablet computer, a mobile phone, a video phone, an electronic book reader, a desktop computer, a laptop computer, a netbook, a workstation, a server, a personal digital assistant, a portable media player, an MP3 player, a mobile medical device, a camera, a game console, a digital camera, a car navigator, an electronic billboard, an automatic teller machine, or a wearable device.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The display panel and the display device provided by the embodiments of the present application are described in detail, and specific examples are used herein to explain the principles and implementations of the present application, and the description of the above examples is only for helping to understand the technical solutions and core ideas of the present application, and those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims (9)
1. A display panel, comprising:
A substrate;
A first electrode layer provided on one side of the substrate;
the pixel definition layer is arranged on one side of the substrate and comprises pixel opening areas and non-opening areas arranged between two adjacent pixel opening areas;
The isolation structure is arranged on one side, far away from the substrate, of the pixel definition layer, is positioned in the non-opening area and comprises a first isolation part and a second isolation part which are arranged in a separated mode;
The light-emitting layer is arranged on the pixel definition layer and covers the isolation structure, the light-emitting layer is continuously arranged at the position of the first isolation part, and the light-emitting layer is disconnected at the position of the second isolation part;
the second electrode layer is arranged on one side of the light-emitting layer, which is far away from the pixel definition layer, and the second electrode layer is continuously arranged at the isolation structure;
The isolation structures are arranged around at least one sub-pixel, and in the sub-pixel corresponding to the isolation structures, the first isolation part is positioned at one side of the second isolation part away from the sub-pixel, or the first isolation part is positioned at one side of the second isolation part close to the sub-pixel.
2. The display panel according to claim 1, wherein a width of the first spacer on a side away from the substrate is smaller than a width of the first spacer on a side close to the substrate, and a width of the second spacer on a side away from the substrate is larger than a width of the second spacer on a side close to the substrate.
3. The display panel according to claim 2, wherein the width of the first spacer portion gradually decreases and the width of the second spacer portion gradually increases in a direction in which the substrate is directed toward the spacer structure.
4. A display panel according to claim 3, wherein the first spacer section has a positive trapezoid shape in a direction perpendicular to the substrate, and the second spacer section has an inverted trapezoid shape.
5. The display panel according to any one of claims 1 to 4, wherein the first spacer includes a first side surface and a first bottom surface, the first bottom surface being located on a side of the first spacer adjacent to the substrate, the first side surface and the first bottom surface having a first included angle therebetween;
the second isolation part comprises a second side surface and a second bottom surface, the second bottom surface is positioned at one side of the second isolation part close to the substrate, and a second included angle is formed between the second side surface and the second bottom surface;
The range of the first included angle is larger than or equal to 55 degrees and smaller than or equal to 75 degrees, and the range of the second included angle is larger than or equal to 100 degrees and smaller than or equal to 120 degrees.
6. The display panel according to any one of claims 1 to 4, wherein a distance between a side of the first spacer away from the pixel defining layer and the pixel defining layer is 1.2 micrometers or more and 1.8 micrometers or less, and a distance between a side of the second spacer away from the pixel defining layer and the pixel defining layer is 1 micrometer or more and 2 micrometers or less.
7. The display panel of claim 1, wherein the display panel comprises a plurality of first sub-pixels displaying a first color, a plurality of second sub-pixels displaying a second color, and a plurality of third sub-pixels displaying a third color, the first color, the second color, and the third color being different;
The isolation structures are arranged around one first sub-pixel, and the first isolation part is positioned at one side of the second isolation part close to the first sub-pixel;
the isolation structures are arranged around the second sub-pixel, and the first isolation part is positioned at one side of the second isolation part away from the second sub-pixel;
the isolation structures are arranged around the third sub-pixel, and the first isolation part is positioned at one side of the second isolation part close to the third sub-pixel;
wherein the luminous efficiency of the second sub-pixel is larger than the luminous efficiency of any one of the first sub-pixel and the third sub-pixel.
8. The display panel according to claim 1, wherein the light-emitting layer includes a first light-emitting portion, a charge generation layer, and a second light-emitting portion which are stacked;
The first light-emitting part, the charge generation layer and the second light-emitting part are all arranged continuously at the position where the first isolation part is located, and the first light-emitting part, the charge generation layer and the second light-emitting part are all arranged in a disconnected mode at the position where the second isolation part is located.
9. A display device comprising the display panel according to any one of claims 1 to 8.
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| KR20220063360A (en) * | 2020-11-10 | 2022-05-17 | 엘지디스플레이 주식회사 | Flexible display apparatus and method of manufacturing the same) |
| KR20230101185A (en) * | 2021-12-29 | 2023-07-06 | 엘지디스플레이 주식회사 | Organic light emitting display device |
| CN115915848A (en) * | 2022-11-30 | 2023-04-04 | 武汉天马微电子有限公司 | Display panel, manufacturing method thereof, and display device |
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