CN115207248B - Display panel and display device - Google Patents
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- CN115207248B CN115207248B CN202210837411.0A CN202210837411A CN115207248B CN 115207248 B CN115207248 B CN 115207248B CN 202210837411 A CN202210837411 A CN 202210837411A CN 115207248 B CN115207248 B CN 115207248B
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- 239000010410 layer Substances 0.000 claims abstract description 241
- 239000002346 layers by function Substances 0.000 claims abstract description 71
- 239000000758 substrate Substances 0.000 claims abstract description 49
- 239000010409 thin film Substances 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000002834 transmittance Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000010408 film Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000059 patterning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
- H10K50/824—Cathodes combined with auxiliary electrodes
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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
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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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/352—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels the areas of the RGB subpixels being different
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention provides a display panel and a display device. The display panel is provided with a plurality of display areas and a plurality of non-display areas connected with the display areas. The display panel comprises an array substrate, an auxiliary electrode layer arranged on the array substrate and positioned in the display area, and an organic light-emitting device layer arranged on the array substrate in the display area. The organic light emitting device layer includes a first electrode, an organic functional layer, and a second electrode, which are stacked. The organic functional layer is arranged on the first electrode layer, and orthographic projection of the organic functional layer and the auxiliary electrode layer on the array substrate is not overlapped. The second electrode layer is arranged on the organic functional layer and extends from the organic functional layer to cover a surface, far away from the array substrate, of the auxiliary electrode layer.
Description
Technical Field
The invention relates to the field of display equipment, in particular to a display panel and a display device.
Background
Organic Light-Emitting Diode (OLED) transparent displays are widely applied to the fields of activities, exhibition and exhibition, construction, medicine, industry and the like, and with the development of the age, the demands of people for transparent displays are increasing, the application scenes of the OLED (Organic Light-Emitting Diode) transparent displays are continuously enriched and diversified, and the requirements of novel transparent display technologies cannot be met by the traditional OLED technology.
The conventional OLED cathode is generally prepared by adopting an integral method, and the light transmittance of the conventional OLED cathode is generally relatively low, so that the transparent display requirement cannot be met. Cathode patterning is one of the methods for effectively improving the light transmittance of the OLED transparent display.
There are two common cathode patterning schemes: one is to adopt the organic luminescent area cathode pattern, reduce the area occupied by cathode layer, thus promote the light transmittance, connect the cathode block with the transparent conductive layer, keep the electrical conduction; the other is to prepare two cathode mask plates, wherein the first cathode mask plate is used for manufacturing cathode patterns matched with the pixel luminous area, and the second cathode mask plate is used for manufacturing strip cathodes to be communicated with the first cathode patterns. Although the method can improve the overall light transmittance of the OLED, the cathode preparation process is complex, the light transmittance improvement is not maximized, and the transparent display with high transmittance requirement is difficult to meet.
Disclosure of Invention
The invention aims to provide a display panel and a display device, which are used for solving the technical problems of low light transmittance and the like of an OLED transparent display device.
In order to achieve the above object, the present invention provides a display panel having a plurality of display regions and a plurality of non-display regions connected to the display regions. The display panel includes an array substrate, an auxiliary electrode layer, and an organic light emitting device layer. The auxiliary electrode layer is arranged on the array substrate and is positioned in the display area. The organic light-emitting device layer is arranged on the array substrate in the display area and is electrically connected with the auxiliary electrode layer in the same display area.
The organic light emitting device layer includes a first electrode layer, an organic functional layer, and a second electrode layer. The first electrode layer is arranged on the array substrate and is electrically connected with the thin film transistor in the array substrate. The organic functional layer is arranged on the first electrode layer, and orthographic projection of the organic functional layer and the auxiliary electrode layer on the array substrate is not overlapped. The second electrode layer is arranged on the organic functional layer and extends from the organic functional layer to cover a surface, far away from the array substrate, of the auxiliary electrode layer.
Further, at least one pixel unit is arranged in the display area, the pixel unit is provided with a light-emitting area, and the light-emitting area comprises a plurality of sub-pixels. The organic functional layer is positioned in the light-emitting region and comprises a light-emitting functional layer, a hole functional layer and an electron functional layer. The light-emitting functional layer is arranged between the first electrode layer and the second electrode layer. The hole functional layer is arranged between the first electrode layer and the light-emitting functional layer. The electronic functional layer is arranged between the second electrode layer and the luminous functional layer. The luminous functional layer comprises a plurality of sub-luminous layers, and each sub-pixel is correspondingly provided with one sub-luminous layer. The hole functional layer and the electron functional layer cover each of the sub-light emitting layers in the light emitting region.
Further, the pixel unit is further provided with at least one overlap region, and the overlap region is connected with the light-emitting region. The auxiliary electrode layer is positioned in the lap joint area, and the orthographic projection of the auxiliary electrode layer on the array substrate is not overlapped with the orthographic projection of the hole functional layer and the electron functional layer on the array substrate. The second electrode layer covers each of the sub-pixels in the light emitting region and extends from the light emitting region to the overlap region, covering an exposed face of the auxiliary electrode layer in the overlap region.
Further, the sub-pixels include a red sub-pixel, a green sub-pixel and a blue sub-pixel, and at least one red sub-pixel, at least one green sub-pixel and at least two blue sub-pixels are disposed in each of the light emitting areas. A straight line passing through the center points of the two blue sub-pixels intersects a straight line passing through the center points of the red sub-pixels and the green sub-pixels.
Further, the sub-light emitting layer includes a red light emitting layer, a green light emitting layer, and a blue light emitting layer. The red light emitting layer corresponds to the red subpixel. The green light emitting layer corresponds to the green sub-pixel. The blue light emitting layer corresponds to the blue subpixel. The width of the blue light emitting layer is smaller than the width of the red light emitting layer. The width of the red light emitting layer is smaller than the width of the green light emitting layer.
Further, the display panel further includes a pixel defining layer disposed on a surface of the array substrate facing the organic light emitting device layer. The pixel defining layer is provided with a first opening, a second opening and a third opening. The first opening is provided with the green light-emitting layer. The second opening is provided with the red sub-pixel. The third opening is provided with the blue sub-pixel. The aperture of the third opening is smaller than that of the second opening, and the aperture of the second opening is smaller than that of the first opening.
Further, the orthographic projection of the pixel defining layer is at least partially misaligned with the orthographic projection of the auxiliary electrode layer.
Further, a light transmission pattern is arranged in the second electrode layer, and the light transmission pattern is located in the non-display area.
Further, the display panel further comprises a light-transmitting structure, and the light-transmitting structure is arranged in the array substrate and located in the non-display area.
The invention also provides a display device comprising the display panel.
The invention has the advantages that: according to the display panel and the display device, the second electrode layer in the organic light-emitting device layer is arranged in the display area, the second electrode layer in the non-display area is removed, and signal connection of the second electrode layer is ensured through the auxiliary electrode layer, so that the light transmittance of the non-display area is prevented from being influenced by the film layer in the organic light-emitting device layer while the display of the panel is not influenced, and the light transmittance of the display panel is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of a display panel according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of a display area of the display panel of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the display panel of FIG. 1 taken along line AA';
FIG. 4 is a schematic diagram showing the distribution of the hollow functional layer and the electronic functional layer in the display panel according to the embodiment of the present invention;
FIG. 5 is an enlarged schematic view of a display area of the display panel of FIG. 4;
FIG. 6 is a schematic diagram showing a distribution of the second electrode layer in the display panel according to an embodiment of the invention;
FIG. 7 is an enlarged schematic view of a display area of the display panel of FIG. 6;
fig. 8 is a schematic cross-sectional view of the display panel of fig. 6 taken along line BB'.
The components in the figure are shown as follows:
a display panel 1; a display area 10;
a non-display area 20; a pixel unit 11;
a light emitting region 12; a sub-pixel 13;
a red sub-pixel 13R; a green sub-pixel 13G;
a blue sub-pixel 13B; a lap zone 14;
an array substrate 100; an organic light emitting device layer 200;
a pixel electrode layer, a first electrode layer 210; an organic functional layer 220;
a hole function layer 221; a light emitting functional layer 222;
a sub-light emitting layer 2221; a red light emitting layer 2221R;
a green light emitting layer 2221G; a blue light emitting layer 2221B;
an electronic functional layer 223; a second electrode layer 230;
a light-transmitting pattern 231; an auxiliary electrode layer 300;
a pixel defining layer 400; a first opening 410;
a second opening 420; a third opening 430;
the light transmissive structure 500.
Detailed Description
The following description of the preferred embodiments of the present invention, which will be described in sufficient detail to enable those skilled in the art to practice the invention, is provided with a further understanding of the invention, and is made clear to a person skilled in the art by reference to the accompanying drawings. The present invention may be embodied in many different forms of embodiments of the invention, the scope of which is not limited to only the embodiments described herein.
In the drawings, like structural elements are referred to by like reference numerals and components having similar structure or function are referred to by like reference numerals. The dimensions and thicknesses of each component shown in the drawings are arbitrarily shown, and the present invention is not limited to the dimensions and thicknesses of each component. The thickness of the components is exaggerated in some places in the drawings for clarity of illustration.
Furthermore, the following description of various inventive embodiments is provided with reference to the accompanying drawings, which illustrate specific inventive embodiments in which the invention may be practiced. Directional terms, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., in the present invention are merely referring to the directions of the attached drawings, and thus, directional terms are used for better, more clear explanation and understanding of the present invention, rather than indicating or implying that the apparatus or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
When some element is described as being "on" another element, the element may be directly on the other element; there may also be an intermediate member that is placed on the intermediate member and the intermediate member is placed on another member. When an element is referred to as being "mounted to" or "connected to" another element, it can be directly "mounted to" or "connected to" the other element or be indirectly "mounted to" or "connected to" the other element via an intervening element.
The embodiment of the invention provides a display device which is a transparent OLED display device and comprises a display panel 1, wherein the display panel 1 provides a display picture for the display device. The display device can be any display device with a display function, such as a mobile phone, a notebook computer, a tablet computer and the like.
As shown in fig. 1, the display panel 1 has a plurality of display areas 10 and a plurality of non-display areas 20 connected to the display areas 10. The display areas 10 are arranged on the display panel 1 in an array manner, and adjacent display areas 10 are connected through the non-display areas 20, namely, two adjacent display areas 10 are not connected. The display area 10 is used for providing a display image. The non-display area 20 is a light-transmitting area, so that light can easily pass through the non-display area to make the display panel 1 transparent, and a user can observe a scene behind the display panel 1 through the non-display area 20, thereby realizing transparent display.
As shown in fig. 2, each display area 10 is provided with a pixel unit 11, and the pixel unit 11 has a light emitting area 12 and four overlapping areas 14.
Four sub-pixels 13 are arranged in the light emitting region 12. The sub-pixels 13 are arranged in an array in the light emitting region 12, and include a red sub-pixel 13R, a green sub-pixel 13G, and two blue sub-pixels 13B. The straight line passing through the center points of the two blue sub-pixels 13B intersects with and is perpendicular to the straight line passing through the center points of the red sub-pixel 13R and the green sub-pixel 13G, so that the red sub-pixel 13R, the green sub-pixel 13G and the blue sub-pixel 13B in the same pixel unit 11 are uniformly distributed.
The overlap region 14 is connected to the light emitting region 12, and one side of each sub-pixel 13 is correspondingly provided with the overlap region 14. The overlap region 14 is located on a side of the adjacent sub-pixel 13 away from other sub-pixels 13 in the same light emitting region 12.
As shown in fig. 3, the display panel 1 includes an array substrate 100, an organic light emitting device layer 200, and an auxiliary electrode layer 300.
The array substrate 100 is provided with a plurality of thin film transistors, the thin film transistors are located in the display areas 10, and each display area 10 has at least four thin film transistors therein. The thin film transistor serves as a switch to drive whether or not each sub-pixel 13 in each pixel unit 11 emits light.
A pixel electrode layer 210 is disposed on a surface of the array substrate 100 facing the organic light emitting device layer 200, the pixel electrode layer 210 is disposed in the light emitting region 12, and one pixel electrode layer 210 is disposed in each sub-pixel 13 correspondingly. The pixel electrode layer 210 is electrically connected to the source/drain electrode of at least one thin film transistor, and two adjacent pixel electrode layers 210 in the same light emitting region 12 are disposed in an insulated manner.
As shown in fig. 2 and 3, each landing zone 14 has one of the auxiliary electrode layers 300 therein. The auxiliary electrode layer 300 may be disposed on the same surface of the array substrate 100 as the pixel electrode layer 210, or may be disposed on the same layer as the gate layer or the source/drain layer of the thin film transistor, but the auxiliary electrode layer 300 is electrically insulated from other conductive film layers disposed on the same layer. The auxiliary electrode layer 300 can be manufactured in the same process with other conductive film layers arranged on the same layer, so that the preparation process is not required to be increased, and the influence of the auxiliary electrode layer 300 on the production efficiency is reduced. Preferably, as shown in fig. 3, the auxiliary electrode layer 300 and the pixel electrode layer 210 are disposed on a surface of the array substrate 100 facing the organic light emitting device layer 200, so as to reduce difficulty in electrical connection between the auxiliary electrode layer 300 and the organic light emitting device layer 200, and reduce path depth of electrical connection, difficulty in opening holes, and production cost.
A pixel defining layer 400 is further disposed on a surface of the array substrate 100 facing the organic light emitting device layer 200 and is located in the display region 10. The front projection of the pixel defining layer 400 on the array substrate 100 is at least partially misaligned with the front projection of the auxiliary electrode layer 300 on the array substrate 100. Preferably, the pixel defining layer 400 is located in the light emitting region 12, and the orthographic projection of the pixel electrode layer 210 is completely misaligned with the orthographic projection of the auxiliary electrode layer 300, so that a surface of the auxiliary electrode layer 300 remote from the array substrate 100 can be completely exposed, thereby improving the success rate of the electrical connection of the auxiliary electrode layer 300 with other devices.
Specifically, the pixel defining layer 400 is located in the light emitting region 12 of each pixel unit 11, and a first opening 410, a second opening 420 and two third openings 430 are disposed in the pixel defining layer 400 in each light emitting region 12. The first opening 410, the second opening 420 and the third opening 430 penetrate through the pixel defining layer 400 to a surface of the pixel electrode layer 210 away from the array substrate 100, so that the surface of the pixel electrode layer 210 is exposed. The first opening 410 is located in the green sub-pixel 13G, the second opening 420 is located in the red sub-pixel 13R, and the third opening 430 is located in the blue sub-pixel 13B. Further, the aperture of the first opening 410 is larger than the aperture of the second opening 420, and the aperture of the second opening 420 is larger than the aperture of the third opening 430.
The organic light emitting device layer 200 is disposed on the array substrate 100 and is located in the display region 10. The organic light emitting device layer 200 includes a first electrode layer 210, a second electrode layer 230, and an organic functional layer 220.
The pixel electrode layer 210 is a first electrode layer 210 in the organic light emitting device layer 200, and the first electrode layer 210 is also an anode of the organic light emitting device layer 200.
The organic functional layer 220 is disposed on a surface of the first electrode layer 210 and the pixel defining layer 400 remote from the array substrate 100. Wherein the organic functional layer 220 includes a hole functional layer 221, a light emitting functional layer 222, and an electron functional layer 223.
The hole function layer 221 is located in the light emitting region 12 and covers the pixel defining layer 400 and the first electrode layer 210 located in the first, second and third openings 410, 420 and 430. The hole function layer 221 includes a hole injection layer and a hole transport layer for acquiring holes in the first electrode layer 210 and migrating the acquired holes to the light emitting function layer 222.
The light emitting functional layer 222 is disposed on a surface of the hole functional layer 221 away from the first electrode layer 210, and is provided with a plurality of sub-light emitting layers 2221, and each opening is provided with one sub-light emitting layer 2221. Electrons and holes are injected from the anode and cathode of the organic light emitting device layer 200, respectively, and migrate to each sub light emitting layer 2221 through the hole function layer 221 and the electron function layer 223, meet in the sub light emitting layer 2221, form excitons and excite light emitting molecules in the sub light emitting layer 2221 to emit light, thereby realizing self light emitting display.
The sub-light emitting layers 2221 may be divided into red light emitting layers 2221R, green light emitting layers 2221G and blue light emitting layers 2221B according to the color of the light emitted by the sub-light emitting layers 2221, and are used for emitting red light, green light and blue light, respectively. In the same pixel unit 11, the light emitting functional layer 222 has four sub-light emitting layers 2221, which are one red light emitting layer 2221R, one green light emitting layer 2221G, and two blue light emitting layers 2221B, respectively. The red light emitting layer 2221R is located in the red sub-pixel 13R, the green light emitting layer 2221G is located in the green sub-pixel 13G, the two blue light emitting layers 2221B are respectively located in the two blue sub-pixels 13B, that is, the green light emitting layer 2221G is located in the first opening 410, the red light emitting layer 2221R is located in the second opening 420, and the blue light emitting layer 2221B is located in the two third openings 430.
Further, due to the aperture difference between the different openings, the width of the blue light emitting layer 2221B is caused to be smaller than the width of the red light emitting layer 2221R, and the width of the red light emitting layer 2221R is caused to be smaller than the width of the green light emitting layer 2221G, so that the light emitting area of the single blue sub-pixel 13B is made smaller than the light emitting area of the single red sub-pixel 13R, and the light emitting area of the single red sub-pixel 13R is made smaller than the light emitting area of the single green sub-pixel 13G.
The electron functional layer 223 is located in the light emitting region 12, is provided on the hole functional layer 221, and covers each sub-light emitting layer 2221 in the light emitting region 12. The electron functional layer 223 includes an electron injection layer and an electron transport layer for capturing electrons in the second electrode layer 230 and migrating the obtained electrons into the light emitting functional layer 222.
As shown in fig. 4 and 5, the hole function layer 221 and the electron function layer 223 may be precisely prepared in each light emitting region 12 by printing, inkjet printing, evaporation, etc. without preparing the hole function layer 221 and the electron function layer 223 in the non-display region 20, thereby preventing the hole function layer 221 and the electron function layer 223 from blocking the non-display region 20 and reducing the influence of the hole function layer 221 and the electron function layer 223 on the light transmittance of the non-display region 20.
In addition, the hole functional layer 221 and the electron functional layer 223 cover the plurality of sub-pixels 13 in the same light emitting region 12, so as to reduce the preparation precision of the hole functional layer 221 and the electron functional layer 223, thereby reducing the preparation difficulty and improving the yield of the product. Meanwhile, the orthographic projections of the hole function layer 221 and the electron function layer 223 on the array substrate 100 do not coincide with the orthographic projections of the auxiliary electrode layer 300 on the array substrate 100, thereby preventing the hole function layer 221 and the electron function layer 223 from affecting the stability of electrical connection between the auxiliary electrode layer 300 and other devices due to covering the auxiliary electrode layer 300.
As shown in fig. 3, 6 and 7, the second electrode layer 230 is disposed on a surface of the electronic functional layer 223 remote from the light emitting functional layer 222. Specifically, in the display area 10, the second electrode layer 230 covers the light emitting area 12 and the overlap area 14 of each pixel unit 11, is disposed on a surface of the electronic functional layer 223 away from the light emitting functional layer 222, and extends from the electronic functional layer 223 in the light emitting area 12 to the overlap area 14 in the same pixel unit 11, and covers a surface of the auxiliary electrode layer 300 in the overlap area 14 away from the array substrate 100, so as to be electrically connected to the auxiliary electrode layer 300. The second electrode layer 230 is a cathode of the organic light emitting device layer 200.
Further, as shown in fig. 6 and 8, in the non-display area 20, the second electrode layer 230 has a light-transmitting pattern 231, and the light-transmitting pattern 231 penetrates through the second electrode layer 230, so that the second electrode layer 230 forms a hollowed-out structure, and only the conductive structure of the second electrode layer 230 in the display area 10 is remained, thereby improving the light-transmitting effect of the display panel 1 while ensuring the conductive light emission of the organic light-emitting device layer 200, and reducing the influence of the second electrode layer 230 on the scene behind the see-through panel. Further, the second electrode layer 230 may be formed into the light-transmitting pattern 231 corresponding to the non-display region 20 through a patterning process such as a mask etching process, a photolithography process, etc., and the manufacturing method thereof is simple, and does not generate excessive production steps.
Since adjacent display areas 10 are connected through the non-display area 20, the second electrode layer 230 in the display area 10 is disconnected due to the light-transmitting pattern 231 in the non-display area 20, and thus, no signal transmission is possible. Therefore, the second electrode layer 230 in each pixel unit 11 is electrically connected to the auxiliary electrode layer 300 in the same pixel unit 11, and the auxiliary electrode layer 300 is connected to the cathode signal circuit in the display panel 1, so that the cathode signal can be smoothly transmitted to the second electrode layer 230.
As shown in fig. 8, the display panel 1 further has a light-transmitting structure 500, and each non-display area 20 has one light-transmitting structure 500 therein. The light-transmitting structure 500 is disposed in the array substrate 100, and may be a hole-slot structure penetrating through the array substrate 100, or a light-transmitting film layer may be disposed at a position of the array substrate 100 corresponding to the non-display area 20, so as to promote the transparency of the array substrate 100 in the non-display area 20, so that light behind the display panel 1 can smoothly pass through the array substrate 100, and further transparent display is achieved.
In the display panel provided by the embodiment of the invention, the second electrode layer and the organic functional layer in the organic light-emitting device layer are arranged in the display area, the second electrode layer and the organic functional layer in the non-display area are removed, and the normal operation of the organic display device layer is ensured through the auxiliary electrode, so that the normal display of the display panel is not influenced, the film layer in the organic light-emitting device layer is prevented from influencing the light transmission of the non-display area, the light transmission rate of the display panel is improved, and the transparency is enhanced. Meanwhile, a hole functional layer and an electron functional layer in the organic functional layer cover a plurality of sub-pixels in the same light-emitting area, so that the preparation difficulty of the hole functional layer and the electron functional layer is reduced, and the yield of the display panel is improved.
In other embodiments of the present invention, the number and shape of the auxiliary electrodes in the same pixel unit are not limited, and may be adjusted according to actual requirements to form a new display panel, and the electrical connection relationship and the position structure of the device in the display panel are similar to those of the display panel provided in the present embodiment, so that redundant descriptions are not repeated here. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.
Claims (9)
1. A display panel, characterized by having a plurality of display areas and a plurality of non-display areas connected to the display areas;
the display panel includes:
an array substrate;
the auxiliary electrode layer is arranged on the array substrate and is positioned in the display area;
an organic light emitting device layer disposed on the array substrate in the display region and electrically connected to the auxiliary electrode layer in the same display region;
the organic light emitting device layer includes:
the first electrode layer is arranged on the array substrate and is electrically connected with the thin film transistor in the array substrate;
the organic functional layer is arranged on the first electrode layer, and orthographic projection of the organic functional layer and the auxiliary electrode layer on the array substrate is not overlapped;
the second electrode layer is arranged on the organic functional layer; in the display region, the second electrode layer extends from the organic functional layer to cover a surface of the auxiliary electrode layer away from the array substrate;
at least one pixel unit is arranged in the display area, the pixel unit is provided with a light-emitting area, and the light-emitting area comprises a plurality of sub-pixels;
the sub-pixels comprise red sub-pixels, green sub-pixels and blue sub-pixels, and each light-emitting area is internally provided with at least one red sub-pixel, at least one green sub-pixel and at least two blue sub-pixels;
a straight line passing through the center points of the two blue sub-pixels intersects a straight line passing through the center points of the red sub-pixels and the green sub-pixels.
2. The display panel of claim 1, wherein the organic functional layer is located in the light emitting region, and comprising:
a light-emitting functional layer arranged between the first electrode layer and the second electrode layer;
a hole function layer provided between the first electrode layer and the light-emitting function layer;
an electronic functional layer arranged between the second electrode layer and the light-emitting functional layer;
the luminous functional layer comprises a plurality of sub-luminous layers, and each sub-pixel is correspondingly provided with one sub-luminous layer;
the hole functional layer and the electron functional layer cover each of the sub-light emitting layers in the light emitting region.
3. The display panel of claim 2, wherein the pixel unit further has at least one overlap region, the overlap region being connected to the light emitting region;
the auxiliary electrode layer is positioned in the overlap area, and the orthographic projection of the auxiliary electrode layer on the array substrate is not overlapped with the orthographic projection of the hole functional layer and the electron functional layer on the array substrate;
the second electrode layer covers each of the sub-pixels in the light emitting region and extends from the light emitting region to the overlap region, covering an exposed face of the auxiliary electrode layer in the overlap region.
4. The display panel of claim 2, wherein the sub-light emitting layer comprises:
a red light emitting layer corresponding to the red sub-pixel;
a green light emitting layer corresponding to the green sub-pixel;
a blue light emitting layer corresponding to the blue sub-pixel;
the width of the blue light emitting layer is smaller than that of the red light emitting layer;
the width of the red light emitting layer is smaller than the width of the green light emitting layer.
5. The display panel of claim 4, further comprising:
the pixel limiting layer is arranged on one surface of the array substrate facing the organic light-emitting device layer;
a first opening penetrating the pixel defining layer, wherein the first opening is provided with a green light emitting layer;
a second opening penetrating the pixel defining layer, wherein the second opening is provided with a red sub-pixel;
a third opening penetrating the pixel defining layer, wherein the third opening is provided with a blue sub-pixel;
the aperture of the third opening is smaller than that of the second opening;
the aperture of the second opening is smaller than the aperture of the first opening.
6. The display panel of claim 5, wherein the orthographic projection of the pixel defining layer and the auxiliary electrode layer on the array substrate is at least partially misaligned.
7. The display panel of claim 1, wherein a light transmissive pattern is provided in the second electrode layer, the light transmissive pattern being located in the non-display region.
8. The display panel of claim 1, further comprising a light transmissive structure disposed in the array substrate and in the non-display region.
9. A display device comprising a display panel according to any one of claims 1-8.
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