Display panel and display device

Abstract

The invention provides a display panel and a display device.The display panel is provided with a plurality of pixel regions and spacer regions located between every two adjacent pixel regions, and specifically comprises a substrate; the multiple functional layers are arranged in a stacked mode, located on one side of the substrate base plate, at least located in the multiple pixel areas and configured to comprise a blue light emitting layer; the partition structure is positioned in the spacer region on one side of the substrate and is configured to comprise at least two partition layers and an inner concave layer between the at least two partition layers; wherein the partition structure and the multiple functional layers are configured to be a first vertical distance between the blue light emitting layer located in the multiple pixel areas and the partition structure, and the first vertical distance is larger than or equal to 1 / 3 of the thickness of the partition structure; and / or is greater than or equal to 1 / 2 of a second vertical distance between one of the at least two partition layers, which is far away from the substrate base plate, and the inner concave layer.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] A silicon-based organic light-emitting diode (OLED) display device is a new type of display device with a silicon wafer as the substrate. It has the advantages of self-luminescence, low power consumption, miniaturization, and high PPI (Pixels Per Inch), and has been widely used in various fields of production and life.

[0003] However, when the applicant applies the OLED display device, it is often found that the blue light emission is poor at low gray levels, and the low gray levels are yellowish, resulting in product defects.

[0004] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those skilled in the art. Summary of the Invention

[0005] In view of this, the present application provides a display panel and a display device to solve or partially solve the above problems.

[0006] Based on the above purpose, in a first aspect, the present application provides a display panel having a plurality of pixel regions and a spacer region located between two adjacent pixel regions; the display panel includes:

[0007] A substrate;

[0008] A plurality of functional layers stacked on one side of the substrate, and at least located in the plurality of pixel regions, configured to include a blue light-emitting layer;

[0009] A partition structure located in the spacer region on one side of the substrate, configured to include at least two partition layers and a concave layer between the at least two partition layers;

[0010] Wherein, the partition structure and the multi-layer functional layer are configured such that a first vertical distance between the blue light-emitting layer in the plurality of pixel regions and the partition structure is greater than or equal to 1 / 3 of the thickness of the partition structure, and / or greater than or equal to 1 / 2 of a second vertical distance between a partition layer far from the substrate in the at least two partition layers and the concave layer.

[0011] In some exemplary embodiments, an extension portion is provided on the partition layer far from the substrate of the partition structure, and the extension portion extends a set distance toward the pixel region;

[0012] On one side of the extension away from the substrate, the vertical distance between it and the blue light emitting layer located in the plurality of pixel regions is the first vertical distance.

[0013] In some exemplary embodiments, the multi-layer functional layer is configured to adjust the first vertical distance between the partition structure and the blue light emitting layer located in the plurality of pixel regions by adjusting the thickness of other functional layers between the blue light emitting layer and the substrate.

[0014] In some exemplary embodiments, the multi-layer functional layer includes:

[0015] At least one first hole transport layer, located between the substrate and the blue light emitting layer, and configured to adjust the first vertical distance between the partition structure and the blue light emitting layer located in the plurality of pixel regions by adjusting its own thickness.

[0016] In some exemplary embodiments, the multi-layer functional layer includes:

[0017] At least one first hole blocking layer, located between the substrate and the blue light emitting layer, and configured to adjust the first vertical distance between the partition structure and the blue light emitting layer located in the plurality of pixel regions by adjusting its own thickness.

[0018] In some exemplary embodiments, the multi-layer functional layer includes:

[0019] At least one first electron transport layer, located between the substrate and the blue light emitting layer, and configured to adjust the first vertical distance between the partition structure and the blue light emitting layer located in the plurality of pixel regions by adjusting its own thickness.

[0020] In some exemplary embodiments, the multi-layer functional layer includes:

[0021] At least one second electron transport layer, located on the side of the blue light emitting layer away from the substrate, and configured to adjust according to the adjustment of other functional layers in the multi-layer functional layer so that the overall thickness of the multi-layer functional layer remains unchanged.

[0022] In some exemplary embodiments, the multi-layer functional layer includes:

[0023] At least one second hole blocking layer, located on the side of the blue light emitting layer away from the substrate, and configured to adjust according to the adjustment of other functional layers in the multi-layer functional layer so that the overall thickness of the multi-layer functional layer remains unchanged.

[0024] In some exemplary embodiments, the partition structure is configured to adjust a first vertical distance between the partition structure and the blue light emitting layer located in the plurality of pixel regions by adjusting its own thickness.

[0025] In some exemplary embodiments, the thickness of the partition structure is between and The second vertical distance is between and The first vertical distance is greater than or equal to

[0026]

[0027] Based on the same concept, in a second aspect, the present application further provides a display device, including the display panel described in the first aspect above.

[0028] As can be seen from the above, the present application provides a display panel and a display device. The display panel has a plurality of pixel regions and a spacer region located between two adjacent pixel regions, and specifically includes: a substrate; a plurality of functional layers stacked on one side of the substrate and at least located in the plurality of pixel regions, configured to include a blue light emitting layer; a partition structure located in the spacer region on one side of the substrate, configured to include at least two partition layers and a concave layer between the at least two partition layers; wherein, the partition structure and the plurality of functional layers are configured such that a first vertical distance between the blue light emitting layer located in the plurality of pixel regions and the partition structure is greater than or equal to 1 / 3 of the thickness of the partition structure, and / or greater than or equal to 1 / 2 of a second vertical distance between one of the at least two partition layers away from the substrate and the concave layer. The present application controls the relative vertical distance between the blue light emitting layer in the plurality of functional layers located in the pixel region and the partition structure located in the spacer region between two adjacent pixel regions, and adjusts the first vertical distance between the two to be greater than or equal to 1 / 3 of the thickness of the partition structure or 1 / 2 of the second vertical distance. Thus, by controlling the distance between the two and increasing or controlling the thickness of this part, when processing the blue light emitting layer, it effectively prevents the film layer material from entering the gap formed by the partition structure, thereby preventing the contact between the blue light emitting layer and the red light emitting layer and the green light emitting layer, and preventing the leakage caused by the too small resistance between the blue light emitting layer and other light emitting layers due to contact. Such leakage will cause the red light emitting layer and the green light emitting layer to emit light, and the mixture of the two is yellow light. Therefore, after increasing the relative vertical distance between the blue light emitting layer and the partition structure, it effectively solves the problems of poor blue light emission during gray scale and yellowish low gray scale, and improves the product yield. Description of the Drawings

[0029] To more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the related art. Obviously, the accompanying drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a schematic diagram of a partial hierarchical structure of an exemplary display panel provided by an embodiment of the present application.

[0031] Figure 2 It is a schematic diagram of the effect of an experimental verification on an exemplary display panel provided by an embodiment of the present application.

[0032] Figure 3 It is a schematic diagram of the effect of a second experimental verification on an exemplary display panel provided by an embodiment of the present application.

[0033] Figure 4 It is a schematic diagram of the effect of a third experimental verification on an exemplary display panel provided by an embodiment of the present application.

[0034] Figure 5 It is a schematic diagram of the hierarchical relationship and thickness of some multi-layer functional layers of an exemplary display panel provided by an embodiment of the present application. Detailed implementation manners

[0035] To make the objectives, technical solutions, and advantages of this specification clearer, the following further describes this specification in detail with reference to specific embodiments and the accompanying drawings.

[0036] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the ordinary meanings understood by those of ordinary skill in the art to which the present application belongs. The "first", "second", and similar terms used in the embodiments of the present application do not indicate any order, quantity, or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements, objects, or method steps appearing before this term cover the elements, objects, or method steps listed after this term and their equivalents, without excluding other elements, objects, or method steps. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0037] As described in the background technology section, in some embodiments, with the development of silicon-based Micro-OLED technology, it is gradually widely used in industries such as VR / AR, night vision, and aiming. Micro-OLED has the characteristics of high PPI, and the sub-pixel size is very small, only in the micron order. At the same time, there is no mature FMM technology for this scale. Therefore, the current Micro-OLED products still need to be based on the form of white light devices + CF to achieve full color. The requirements for the technical indicators of Micro-OLED products are mainly reflected in the following aspects: ① high brightness, ② high color gamut, ③ wide viewing angle, ④ low power consumption, ⑤ long life, ⑥ high and low grayscale color point stability. With the development of the industry, there are many solutions for the first five product performances, and the stability of the high and low grayscale color points of the product has become the main indicator limiting the optical performance of the product. In order to meet the high brightness requirements, the current mainstream process routes all adopt the Tandem white light route. In the Tandem white light route, the carrier generation layer has good lateral transmission performance, so it needs to be separated by a partition structure to avoid crosstalk between pixels. Although the partition structure has solved the above problems well, there are still residual images and low grayscale color gamuts that can be further optimized.

[0038] After discovering the aforementioned problem, the applicant conducted a large number of experiments and transmission electron microscope (TEM) slice analysis and found that the main reason for the afterimage and poor low grayscale color gamut is that the blue light emitting film layer (B-EML) in the light emitting layer (EL) film stack penetrates into the partition structure, causing the upper blue light emitting unit and the lower light emitting unit to be virtually connected (mainly red light emitting unit and green light emitting unit, the two colors of light combine to form yellow light), forming a leakage path here. When the voltage is low, the current will preferentially flow through the thinner blue light area, but the blue light emitting area here is small, resulting in insufficient blue light intensity, and the low grayscale of the device mainly presents yellow light.

[0039] It should be noted that the partition structure can generally be an "I"-shaped structure, and a depression will be formed in the middle of it. The layered material of the aforementioned blue light emitting film layer (B-EML) penetrates into the depression, resulting in a virtual connection between the blue light emitting film layer (B-EML) and the red light emitting film layer (R-EML) and the green light emitting film layer (G-EML). That is, due to the presence of the depression inside the partition structure, the B-EML film layer is easily filled into the partition structure, resulting in a very small contact resistance between the lower light-emitting unit and the B-EML, which is prone to leakage. As a result, the low-grayscale blue light of the device is poor, and the low-grayscale is yellowish.

[0040] In combination with the above actual situation, an embodiment of the present application provides a display panel. By controlling the relative vertical distance between the blue light emitting layer in the pixel region and the partition structure in the spacer region between two adjacent pixel regions, the present application adjusts the first vertical distance between the two to be greater than or equal to 1 / 3 of the thickness of the partition structure or 1 / 2 of the second vertical distance. In this way, by controlling the distance between the two and increasing or controlling the thickness of this part, when processing the blue light emitting layer, the film layer material thereof is effectively prevented from entering the gap formed by the partition structure, thereby preventing the contact between the blue light emitting layer and the red light emitting layer and the green light emitting layer, and preventing the leakage caused by the too small resistance between the blue light emitting layer and other light emitting layers due to contact. Such leakage will cause the red light emitting layer and the green light emitting layer to emit light, and the mixture of the two is yellow light. Therefore, after increasing the relative vertical distance between the blue light emitting layer and the partition structure, the problems of poor blue light emission in gray scale and yellowish low gray scale are effectively solved, and the product yield is improved.

[0041] Figure 1 FIG. shows a schematic diagram of a partial hierarchical structure of an exemplary display panel provided by an embodiment of the present application.

[0042] Combined with Figure 1 As shown, a display panel 100 according to an embodiment of the present application has a plurality of pixel regions 101 and a spacer region 102 located between two adjacent pixel regions 101; the display panel 100 includes: a substrate 110; a plurality of functional layers 120 stacked on one side of the substrate 110 and at least located in the plurality of pixel regions 101, configured to include a blue light emitting layer 121; a partition structure 130 located in the spacer region 102 on one side of the substrate 110, configured to include at least two partition layers 131 and a concave layer 132 between the at least two partition layers 131; wherein, the partition structure 130 and the plurality of functional layers 120 are configured such that a first vertical distance d1 between the blue light emitting layer 121 in the plurality of pixel regions 101 and the partition structure 130 is greater than or equal to 1 / 3 of the thickness d2 of the partition structure 130, and / or greater than or equal to 1 / 2 of a second vertical distance d3 between one of the at least two partition layers 131 far from the substrate 110 and the concave layer 132.

[0043] In this embodiment, the plurality of pixel regions 101 can be used to form pixel patterns or pixel light spots, and there will be a certain gap between two adjacent pixel regions 101, and this gap is the spacer region 102. Then, the substrate 110 can be used to carry other components in the display panel 100.

[0044] The multi-layer functional layer 120 can be used for pixel light emission. It can drive various color light-emitting layers (such as blue light-emitting layer B-EML, red light-emitting layer R-EML, green light-emitting layer G-EML, etc.) of the multi-layer functional layer 120 by using some functional layers (such as charge generation layer CGL, hole transport layer HTL, hole blocking layer HBL, electron transport layer ETL, etc.) to emit light. In some embodiments, the multi-layer functional layer 120 may only exist in the pixel region 101; it may also be laid uniformly throughout the layer, that is, as Figure 1 shown, the multi-layer functional layer 120 is laid in both the pixel region 101 and the spacer region 102. At the same time, the blue light-emitting layer exemplarily corresponds to Figure 1 layer 121 therein, the green light-emitting layer exemplarily corresponds to layer 127, and the red light-emitting layer exemplarily corresponds to layer 128. According to the corresponding design requirements, the green light-emitting layer 127 and the red light-emitting layer 128 can be directly stacked. At the same time, during the laying process of the multi-layer functional layer 120, considering some other factors, the green light-emitting layer 127 and the red light-emitting layer 128 will be laid first, and then the blue light-emitting layer 121 will be laid later, that is, as Figure 1 shown, the green light-emitting layer 127 and the red light-emitting layer 128 are located below the blue light-emitting layer 121.

[0045] The partition structure 130 can be disposed in the spacer region 102 and relatively close to one side of the substrate 110. That is to say, if the multi-layer functional layer 120 is laid throughout the layer, its functional layer will be located on the side of the partition structure 130 away from the substrate 110 when laid in the spacer region 102. At the same time, since the partition structure 130 or a similar structure is generally not provided in the pixel region 101, furthermore, when the multi-layer functional layer 120 is laid, a height difference will be formed at the junction of the pixel region 101 and the spacer region 102. This height difference will cause the folding of the multi-layer functional layer 120, and combined with the depression caused by the "I"-shaped structure of the partition structure 130 itself, it is then easy to cause the situation that the hierarchical material of the blue light-emitting layer 121 in the foregoing embodiments enters the depression and forms a virtual connection with other light-emitting layers. In a more specific application scenario, the partition structure 130 may include at least two partition layers 131 for forming two longer layers of the "I"-shaped structure. After that, the partition structure 130 may further include an inner concave layer 132 between at least two partition layers 131 for forming the middle shorter layer of the "I"-shaped structure.

[0046] Afterwards, through experiments by the applicant, it was found that the above-mentioned problems can be eliminated by increasing or controlling the first vertical distance d1 between the blue light emitting layer 121 and the partition structure 130. Specifically, since the main way for the blue light emitting layer 121 to enter the partition structure 130 is that the material of the blue light emitting layer 121 enters the depression in the concave layer 132 of the partition structure 130, the first vertical distance d1 between the blue light emitting layer 121 and the partition structure 130 can be increased. At the same time, the drop formed by the partition structure 130 in the spacer region 102 (i.e., the thickness d2 of the partition structure 130) will also affect the determination of the first vertical distance d1, and the second vertical distance d3 between at least two partition layers 131 in the partition structure 130 that is far from the substrate 110 and the concave layer 132 will also affect the determination of the first vertical distance d1. Therefore, in order to make the first vertical distance d1 thick enough so that the material of the blue light emitting layer 121 cannot leak into the depression formed by the concave layer 132 of the partition structure 130, the first vertical distance d1 can be greater than or equal to 1 / 3 of the thickness d2 of the partition structure 130; or greater than or equal to 1 / 2 of the second vertical distance d3.

[0047] In a more specific application scenario, for the thickness d2 of the partition structure 130, it can be in to ; for the second vertical distance d3, it can be in to ; afterwards, for the first vertical distance d1, it can be greater than or equal to

[0048] Taking the thickness d2 of the partition structure 130 in the above specific application scenario being in to , the second vertical distance d3 being in to , and the first vertical distance d1 being greater than or equal to as an example, an effect experiment was carried out. As Figure 2 shown, after increasing the first vertical distance d1 between the blue light emitting layer 121 and the partition structure 130 to be greater than or equal to , a performance comparison was made between the display panel before adjustment (the line represented by Ref in the figure) and the display panel after adjustment (the line represented by the upward movement of B-EML in the figure). As Figure 2 shown, the upper left figure is the J-V curve of the device. After the B-EML moves upward, the leakage level of the display panel is significantly reduced. The upper right figure and the lower right figure are the J-BC.E. curve and the V-BC.E. curve respectively. It can be seen from the figure that after the B-EML moves upward, the efficiency at low current density and low voltage of monochromatic blue (B) is significantly improved. Afterwards, the lower left figure is the spectrum of the two devices at 5.0V, and the blue light emission intensity of the display panel after adjustment is also significantly improved.

[0049] After that, as Figure 3 shown, the left figure is the color deviation map of the display panel (Ref) before adjustment at low gray levels, with 32 gray levels (the line corresponding to 32 in the figure) and 255 gray levels (the line corresponding to 255 in the figure). The right figure is the color deviation map of the display panel (B-EML shifted upward) after adjustment at low gray levels, with 32 gray levels (the line corresponding to 32 in the figure) and 255 gray levels (the line corresponding to 255 in the figure). The black dots in both figures are the origin points, and the lengths of the curves represent the severity of color deviation. By adjusting the distance between B-EML and the partition structure, the color deviation at low gray levels of the product is significantly improved.

[0050] After that, during the film layer simulation process, when the vertical distance between the blue light-emitting layer 121 and the upper surface of the partition structure 130 is less than , the blue light-emitting layer 121 is prone to puncturing into the lower light-emitting unit. When the vertical distance between the blue light-emitting layer 121 and the upper surface of the partition structure 130 is greater than , this risk is reduced. For the current partition structure 130, the key point for stable product performance lies in the controllability of the distortion of the sensitive film layer. However, to achieve this controllable effect, through a large number of experimental comparisons and simulations, it is found that when the vertical distance between the blue light-emitting layer 121 and the upper surface of the partition structure 130 is greater than , this distortion is controllable, and a stable process can be achieved.

[0051] Finally, as Figure 4 shown, it is the process data of the quantification of afterimage for two device structure products, namely the display panel (Ref) before adjustment and the display panel (B shifted upward) after adjustment. The afterimage level of the Ref product is 4HL3; the afterimage level of the B shifted upward product is 4HL2. The main reason for the improvement is the improvement of the light-emitting layer stacking situation and the controllability of the morphology of the blue light-emitting layer 121. From the capacitance C-V curve on the right, the lighter-colored line is the capacitance C-V curve before adjustment, and the darker-colored line is the capacitance C-V curve after adjustment. It can be seen that the capacitance of the display panel after adjustment is better and controllable. In the high voltage range, there is no charge accumulation, and the short afterimage optimization in the early stage is obvious.

[0052] As can be seen above, restricting the first vertical distance d1 between the blue light-emitting layer 121 and the partition structure 130 can ensure the integrity of the blue light-emitting layer 121 and avoid the leakage problem between the upper blue light-emitting layer 121 and the lower green light-emitting layer 127 and red light-emitting layer 128. At the same time, the overall display panel 100 can also exhibit good IVL (current-voltage-brightness) characteristics at low gray levels.

[0053] After that, in some embodiments, as Figure 1As shown, for the partition structure 130, in order to further improve the partition effect, it may further include an extension portion 134. The extension portion 134 is generally disposed on the partition layer 131 of the partition structure 130 on the side away from the substrate 110 and extends toward the pixel region. By using the structure of the extension portion 134 to block, the multi-layer functional layer 120 can be more effectively partitioned and restricted to perform corresponding functions within the pixel region. Of course, the specific extension length or extension distance of the extension portion 134 can be specifically set according to the specific application scenario, and no specific limitation is made here. On this basis, the first vertical distance d1 between the blue light emitting layer 121 and the partition structure 130 can be specifically the vertical distance between the blue light emitting layer 121 and the extension portion 134, and the vertical distance between the two satisfies the foregoing conditions. That is, in some embodiments, the partition layer 131 of the partition structure 130 away from the substrate 110 is provided with an extension portion 134, and the extension portion 134 extends a set distance toward the pixel region 101; the vertical distance between the side of the extension portion 134 away from the substrate 110 and the blue light emitting layer 121 located in the plurality of pixel regions 101 is the first vertical distance d1.

[0054] Further, for how to adjust the first vertical distance d1 between the blue light emitting layer 121 and the partition structure 130, on the basis of the original design, the overall thickness of the partition structure 130 can be reduced. Since the partition structure 130 is located in the spacer region 102, the reduction of its thickness will not affect the blue light emitting layer 121 in the pixel region 101. Furthermore, the height of the blue light emitting layer 121 relative to the substrate 110 will not change accordingly. After the thickness of the partition structure 130 is reduced, its height relative to the substrate 110 also decreases. Furthermore, the first vertical distance d1 between the blue light emitting layer 121 and the partition structure 130 can be increased, so that the first vertical distance d1 can be greater than or equal to That is, in some embodiments, the partition structure 130 is configured to adjust the first vertical distance d1 between the partition structure 130 and the blue light emitting layer 121 located in the plurality of pixel regions 101 by adjusting its own thickness.

[0055] In some embodiments, for how to adjust the first vertical distance d1 between the blue light emitting layer 121 and the partition structure 130, the thickness of other functional layers in the multi-layer functional layer 120 can also be adjusted to increase the first vertical distance d1 between the blue light emitting layer 121 and the partition structure 130 on the basis of the original design. Among them, the thickness of one or more functional layers located between the blue light emitting layer 121 and the substrate 110 in the multi-layer functional layer 120 can be adjusted to affect the vertical distance d1. For example Figure 5As shown, the hierarchical structure of a part of the multi-layer functional layer 120 is exemplarily listed, where the numbering order is the processing sequence. For example, the p-HTL layer numbered 1 is processed first among the listed hierarchies, and the IZO layer numbered 17 is processed last among the listed hierarchies. Furthermore, the lower the number of a hierarchy, the closer it is to the substrate 110 in the multi-layer functional layer 120, and the higher the number of a hierarchy, the farther it is from the substrate 110. At the same time, the thicknesses before and after the adjustment listed therein can be in units. Among them, HTL is a hole transport layer, p-HTL is a P-type doped hole transport layer; Prime is an electron blocking layer, then R-Prime is the electron blocking layer corresponding to the red light-emitting layer, and B-Prime is the electron blocking layer corresponding to the blue light-emitting layer; R-EML, G-EML, and B-EML are the red light-emitting layer, green light-emitting layer, and blue light-emitting layer respectively; HBL is a hole blocking layer; ETL is an electron transport layer; N CGL is an N-type doped charge generation layer, and p CGL is a P-type doped charge generation layer; EIL is an electron injection layer; IZO is an indium zinc oxide (Indium Zinc Oxide, IZO) thin film. Furthermore, the thickness of one or more hierarchies before the B-EML corresponding to the blue light-emitting layer 121 can be adjusted to achieve the vertical distance between the blue light-emitting layer and the partition structure. That is, in some embodiments, the multi-layer functional layer 120 is configured to adjust the thickness of other functional layers between the blue light-emitting layer 121 and the substrate 110 to adjust the first vertical distance d1 between the partition structure 130 and the blue light-emitting layer 121 located in the plurality of pixel regions 101.

[0056] Furthermore, considering that if the thickness of some hierarchies in the multi-layer functional layer 120 changes, it may cause other adverse effects, the hierarchies that can be adjusted can be limited, or these hierarchies can be preferentially adjusted. In some embodiments, as Figure 1 shown, the thickness of the hole transport layer 122, hole blocking layer 123, and electron transport layer 124 located between the blue light-emitting layer 121 and the substrate 110 can be preferentially adjusted. In a more specific scenario, there may be more than one layer for each of the hole transport layer 122, hole blocking layer 123, and electron transport layer 124. Even for the hole transport layer 122, hole blocking layer 123, and electron transport layer 124 located between the blue light-emitting layer 121 and the substrate 110, there may be more than one layer for each of them. Furthermore, one or several layers of the hole transport layer 122, hole blocking layer 123, and electron transport layer 124 located between the blue light-emitting layer 121 and the substrate 110 can be preferentially adjusted to meet the requirements of the aforementioned first vertical distance d1. As Figure 5As shown, in one embodiment, the thickness of a hole transport layer HTL2 located between the blue light-emitting layer 121 and the substrate 110 is adjusted and increased by Of course, in other embodiments, other functional layers or the thicknesses of several functional layers can be adjusted. That is, in some embodiments, the multi-layer functional layer 120 includes: at least one first hole transport layer 122, located between the substrate 110 and the blue light-emitting layer 121, and configured to adjust the first vertical distance d1 between the partition structure 130 and the blue light-emitting layer 121 located in the plurality of pixel regions 101 by adjusting its own thickness. In some embodiments, the multi-layer functional layer 120 includes: at least one first hole blocking layer 123, located between the substrate 110 and the blue light-emitting layer 121, and configured to adjust the first vertical distance d1 between the partition structure 130 and the blue light-emitting layer 121 located in the plurality of pixel regions 101 by adjusting its own thickness. In some embodiments, the multi-layer functional layer 120 includes: at least one first electron transport layer 124, located between the substrate 110 and the blue light-emitting layer 121, and configured to adjust the first vertical distance d1 between the partition structure 130 and the blue light-emitting layer 121 located in the plurality of pixel regions 101 by adjusting its own thickness.

[0057] Further, in order not to affect the overall thickness of the display panel 100, after adjusting the layer thickness between the substrate 110 and the blue light-emitting layer 121, the thicknesses of other functional layers of the multi-layer functional layer 120 located on the side of the blue light-emitting layer 121 away from the substrate 110 can be reduced. Similarly, for the same or similar reasons as described above, the second hole blocking layer 125 and the second electron transport layer 126 located on the side of the blue light-emitting layer 121 away from the substrate 110 can be preferentially reduced. Similarly, both the second hole blocking layer 125 and the second electron transport layer 126 may have more than one layer, and the reduction can be only for one of them or for several of them. As Figure 5 As shown, in one embodiment, the thickness of an electron transport layer ETL2 located on the side of the blue light-emitting layer 121 away from the substrate 110 is adjusted and reduced by Of course, in other embodiments, other functional layers may be adjusted or the thicknesses of several functional layers may be adjusted. That is, in some embodiments, the multi-layer functional layer 120 includes at least one second electron transport layer 126 located on the side of the blue light emitting layer 121 away from the substrate 110, and is configured to be adjusted according to the adjustment of other functional layers in the multi-layer functional layer 120 so that the overall thickness of the multi-layer functional layer 120 remains unchanged. In some embodiments, the multi-layer functional layer 120 includes at least one second hole blocking layer 125 located on the side of the blue light emitting layer 121 away from the substrate 110, and is configured to be adjusted according to the adjustment of other functional layers in the multi-layer functional layer 120 so that the overall thickness of the multi-layer functional layer 120 remains unchanged.

[0058] As can be seen from the above, the display panel provided by the present application has a plurality of pixel regions and a spacer region located between two adjacent pixel regions. Specifically, it includes: a substrate; a multi-layer functional layer stacked on one side of the substrate and at least located in the plurality of pixel regions, configured to include a blue light emitting layer; a partition structure located in the spacer region on one side of the substrate; wherein, the partition structure and the multi-layer functional layer are configured such that the vertical distance between the blue light emitting layer located in the plurality of pixel regions and the partition structure is greater than or equal to The present application controls the relative vertical distance between the blue light emitting layer in the multi-layer functional layer located in the pixel region and the partition structure located in the spacer region between two adjacent pixel regions, and adjusts the relative vertical distance between the two to be greater than or equal to By controlling the distance between the two, when processing the blue light emitting layer, it effectively prevents the film layer material from entering the gap formed by the partition structure, thereby preventing the contact between the blue light emitting layer and the red light emitting layer and the green light emitting layer, and preventing the leakage caused by the too small resistance between the blue light emitting layer and other light emitting layers due to contact. Such leakage will cause the red light emitting layer and the green light emitting layer to emit light, and the mixture of the two is yellow light. Therefore, after increasing the relative vertical distance between the blue light emitting layer and the partition structure, it effectively solves the problems such as poor blue light emission in gray scale and yellowish low gray scale, and improves the product yield.

[0059] Based on the same concept, the present application also provides a display device including the display panel described in any of the foregoing embodiments.

[0060] The display device of the above embodiment is used to apply the corresponding display panel in the foregoing embodiment, and has the beneficial effects of the embodiment of the corresponding display panel, which will not be elaborated herein.

[0061] It can be understood that the display device is a product with an image display function, and generally it is driven by multiple driving circuits. For example, it can be: a display, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a portable video camera, a viewfinder, a navigator, a vehicle, a large-area wall, a household appliance, an information query device (such as a business query device and a monitor in departments such as e-government, banks, hospitals, and power).

[0062] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present application (including the claims) is limited to these examples; under the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the embodiments of the present application as described above, and they are not provided in detail for the sake of brevity.

[0063] In addition, for the sake of simplicity of description and discussion, and in order not to make the embodiments of the present application difficult to understand, the well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. In addition, the device may be shown in block diagram form in order to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform on which the embodiments of the present application are to be implemented (that is, these details should be completely within the understanding of those skilled in the art). In the case where specific details (such as circuits) are set forth to describe the exemplary embodiments of the present application, it will be apparent to those skilled in the art that the embodiments of the present application can be implemented without these specific details or with variations of these specific details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0064] Although the present application has been described in connection with specific embodiments of the present application, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. For example, other memory architectures (such as dynamic RAM (DRAM)) can be used with the embodiments discussed.

[0065] The embodiments of the present application are intended to cover all such alternatives, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the embodiments of the present application shall be included within the protection scope of the present application.

Claims

1. A display panel, characterized in that: A plurality of pixel regions and a spacing region between two adjacent pixel regions are provided; The display panel comprises: substrate substrate; A stacked multi-layer functional layer is located on one side of the base substrate and at least located in the plurality of pixel regions, and is configured to include a blue light emitting layer; A partition structure, located in the spacer area on one side of the base substrate, is configured to include at least two partition layers and a concave layer between the at least two partition layers; In which, the partition structure and the multi-layer functional layer are configured such that a first vertical distance between the blue light emitting layer located in the multiple pixel areas and the partition structure is greater than or equal to 1 / 3 of the thickness of the partition structure, and / or greater than or equal to 1 / 2 of a second vertical distance between a partition layer of the at least two partition layers away from the base substrate and the concave layer.

2. The display panel according to claim 1, characterized in that: The partition structure is provided with an extension portion away from the partition layer of the base substrate, and the extension portion extends toward the pixel area by a set distance; A vertical distance between the extending portion, which is away from a side of the base substrate, and the blue light emitting layer located in the plurality of pixel regions, is the first vertical distance.

3. The display panel according to claim 1, characterized in that: The multi-layer functional layer is configured to adjust a first vertical distance between the partition structure and the blue light emitting layer located in the plurality of pixel regions by adjusting the thickness of other functional layers between the blue light emitting layer and the base substrate.

4. The display panel according to claim 3, characterized in that: The multi-layer functional layer comprises: At least one first hole transport layer is located between the base substrate and the blue light emitting layer, and is configured to adjust a first vertical distance between the partition structure and the blue light emitting layer located in the plurality of pixel regions by adjusting its own thickness.

5. The display panel according to claim 3, characterized in that: The multi-layer functional layer comprises: At least one first hole blocking layer is located between the base substrate and the blue light emitting layer, and is configured to adjust a first vertical distance between the partition structure and the blue light emitting layer located in the plurality of pixel regions by adjusting its own thickness.

6. The display panel according to claim 3, characterized in that: The multi-layer functional layer comprises: At least one first electron transport layer is located between the base substrate and the blue light emitting layer, and is configured to adjust a first vertical distance between the partition structure and the blue light emitting layer located in the plurality of pixel regions by adjusting its own thickness.

7. The display panel according to any one of claims 4 to 6, characterized in that: The multi-layer functional layer comprises: At least one second electron transport layer is located on a side of the blue light emitting layer away from the substrate, and is configured to be adjusted according to the adjustment of other functional layers in the multi-layer functional layer so that the overall thickness of the multi-layer functional layer remains unchanged.

8. The display panel according to any one of claims 4 to 6, characterized in that: The multi-layer functional layer comprises: At least one second hole blocking layer is located on a side of the blue light emitting layer away from the substrate, and is configured to be adjusted according to the adjustment of other functional layers in the multi-layer functional layer so that the overall thickness of the multi-layer functional layer remains unchanged.

9. The display panel according to claim 1, characterized in that: The partition structure is configured to adjust a first vertical distance between the partition structure and the blue light emitting layer located in the plurality of pixel regions by adjusting its own thickness.

10. The display panel according to claim 1, characterized in that: The thickness of the partition structure is The second vertical distance is between The first vertical distance is greater than or equal to 11. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 10.

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