Display device, display panel and manufacturing method thereof

Abstract

The present disclosure relates to the field of display technology, and mainly relates to a display device, a display panel and a manufacturing method thereof. The display panel of the present disclosure includes a substrate, a light-emitting functional layer and a color filter layer, wherein: the light-emitting functional layer is located on one side of the substrate, and includes a plurality of light-emitting units distributed in an array, the light-emitting unit includes a bottom layer and a light-emitting layer, the light-emitting layer is located on the side of the bottom layer away from the substrate, the thickness of the bottom layers of two adjacent light-emitting units is different, the light-emitting layer of each light-emitting unit emits light of one color, and each light-emitting layer can emit light of multiple colors; the color filter layer is located on the side of the light-emitting functional layer away from the substrate, the color filter layer includes a plurality of filter units distributed at intervals, and in the direction perpendicular to the substrate, each filter unit is distributed one-to-one with each light-emitting unit. The display panel of the present disclosure can increase the color gamut area and improve the display effect.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and more particularly, to a display device, a display panel, and a manufacturing method thereof. Background Art

[0002] With the development of display technologies, OLED (Organic Light Emitting Diode) display panels have been widely used due to their advantages such as high response, high contrast, and flexibility. However, the color gamut area of existing OLED devices is small, and the display effect is poor.

[0003] 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 of ordinary skill in the art. Summary of the Invention

[0004] The purpose of the present disclosure is to overcome the above deficiencies of the prior art, and to provide a display device, a display panel, and a manufacturing method thereof, which can increase the color gamut area and improve the display effect.

[0005] According to one aspect of the present disclosure, a display panel is provided, including:

[0006] A substrate;

[0007] A light-emitting functional layer located on one side of the substrate, and including a plurality of light-emitting units distributed in an array, each light-emitting unit including a bottom layer and a light-emitting layer, the light-emitting layer being located on the side of the bottom layer away from the substrate, the thicknesses of the bottom layers of adjacent two light-emitting units being different, each light-emitting layer of each light-emitting unit emitting light of one color, and the light-emitting layers being capable of emitting light of multiple colors;

[0008] A color filter layer located on the side of the light-emitting functional layer away from the substrate, the color filter layer including a plurality of filter units distributed at intervals, and in a direction perpendicular to the substrate, each of the filter units and each of the light-emitting units are distributed in one-to-one correspondence.

[0009] In an exemplary embodiment of the present disclosure, the light-emitting functional layer includes a first light-emitting unit and a second light-emitting unit, and the thickness of the bottom layer of the first light-emitting unit is greater than the thickness of the bottom layer of the second light-emitting unit;

[0010] The material of the filter unit corresponding to the first light-emitting unit is a first filter material, the material of the filter unit corresponding to the second light-emitting unit is a second filter material, and the peak of the transmission spectrum of the first filter material is on the right side of the peak of the transmission spectrum of the second filter material.

[0011] In an exemplary embodiment of the present disclosure, the light-emitting functional layer further includes a plurality of first electrodes and a pixel definition layer. The first electrodes are spaced apart from each other and are respectively located on a side of the bottom layer facing away from the light-emitting layer. The pixel definition layer and the first electrodes are disposed on the same side of the substrate and have a plurality of first openings exposing the first electrodes.

[0012] The display panel further includes:

[0013] A black matrix layer, located on a side of the light-emitting functional layer facing away from the substrate, and having a plurality of second openings respectively exposing the light-emitting units. The distance between the boundary of the second opening corresponding to the first light-emitting unit and the boundary of the first opening corresponding thereto is greater than the distance between the boundary of the second opening corresponding to the second light-emitting unit and the boundary of the first opening corresponding thereto. The color filter layer is located on a side of the black matrix layer facing away from the light-emitting functional layer.

[0014] In an exemplary embodiment of the present disclosure, the first light-emitting unit and the second light-emitting unit emit light of the same color.

[0015] In an exemplary embodiment of the present disclosure, the first light-emitting unit and the second light-emitting unit both emit green light.

[0016] In an exemplary embodiment of the present disclosure, the thickness of the filter unit corresponding to the first light-emitting unit is less than or equal to the thickness of the filter unit corresponding to the second light-emitting unit.

[0017] In an exemplary embodiment of the present disclosure, the material of the light-emitting layer of the first light-emitting unit is different from the material of the light-emitting layer of the second light-emitting unit.

[0018] In an exemplary embodiment of the present disclosure, the display panel further includes:

[0019] An encapsulation layer, located between the light-emitting functional layer and the black matrix layer.

[0020] According to one aspect of the present disclosure, there is provided a method for manufacturing a display panel, including:

[0021] Providing a substrate;

[0022] Forming a light-emitting functional layer on one side of the substrate. The light-emitting functional layer includes a plurality of light-emitting units arranged in an array. The light-emitting unit includes a bottom layer and a light-emitting layer. The light-emitting layer is located on a side of the bottom layer facing away from the substrate. The thicknesses of the bottom layers of adjacent two light-emitting units are different. Each light-emitting layer emits light of one color, and the light-emitting layers can emit light of multiple colors.

[0023] A color filter layer is formed on a side of the light-emitting functional layer facing away from the substrate. The color filter layer includes a plurality of filter units distributed at intervals. In a direction perpendicular to the substrate, each of the filter units and each of the light-emitting units are distributed in one-to-one correspondence.

[0024] According to one aspect of the present disclosure, there is provided a display device including the display panel described in any one of the above.

[0025] In the display device, display panel and manufacturing method thereof of the present disclosure, on the one hand, since each light-emitting unit emits light of multiple colors, full color can be achieved through the combination of light of multiple colors. On the other hand, since the bottom layer thicknesses of two adjacent light-emitting units are different, the heights at which the light-emitting centers of two adjacent light-emitting units are located are different, thereby generating spectra with different peak positions, resulting in a larger gamut difference between two adjacent light-emitting units. Furthermore, when two adjacent light-emitting units are combined to form a new color, the gamut area can be increased. At the same time, the ratio of the areas of two adjacent light-emitting units can avoid too fast visual attenuation, thereby improving color deviation and enhancing the display effect. In addition, the light emitted by the light-emitting units can be filtered by the color filter layer, which can increase the gamut while ensuring light output, further enhancing the display effect.

[0026] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings without creative efforts based on these drawings.

[0028] Figure 1 Schematic diagram of a display panel in an embodiment of the present disclosure;

[0029] Figure 2 Top view of a display panel in an embodiment of the present disclosure;

[0030] Figure 3 Top view of a display panel in an embodiment of the present disclosure;

[0031] Figure 4 Top view of a display panel in an embodiment of the present disclosure;

[0032] Figure 5 Gamut map of a display panel in an embodiment of the present disclosure;

[0033] Figure 6The color gamut map of the display panel in an embodiment of the present disclosure;

[0034] Figure 7 In the embodiment of the present disclosure, for CF 1 and CF 2 The color gamut map obtained after differentiating the materials;

[0035] Figure 8 In the embodiment of the present disclosure, for CF 1 and CF 2 The visual attenuation curve obtained after differentiating the materials;

[0036] Figure 9 It is a flowchart of the manufacturing method of the display panel in the embodiment of the present disclosure.

[0037] Explanation of reference numerals:

[0038] 1. Substrate; 11. Substrate; 12. Planarization layer; 2. Light-emitting functional layer; 21. Light-emitting unit; 211. First electrode; 212. Bottom layer; 213. Light-emitting layer; 214. Second electrode; 22. Pixel definition layer; 23. Spacer layer; 3. Encapsulation layer; 4. Touch electrode layer; 5. Black matrix layer; 6. Color filter layer; 7. Protective layer. Detailed implementation manners

[0039] Now, example embodiments will be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0040] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the icon to another component, these terms are used in this specification only for convenience, for example, according to the direction of the examples described in the drawings. It can be understood that if the device of the icon is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" another structure, it may mean that a structure is integrally formed on another structure, or that a structure is "directly" disposed on another structure, or that a structure is "indirectly" disposed on another structure through another structure.

[0041] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open inclusion and refer to the existence of additional elements / components / etc. in addition to the listed elements / components / etc.; the terms "first", "second", etc. are only used as labels and are not a limitation on the quantity of their objects.

[0042] Embodiments of the present disclosure provide a display panel, which may be an OLED display panel. Of course, it may also be other display panels, and no special limitation is made here. Figure 1 A schematic diagram of the display panel in the embodiments of the present disclosure is shown. In combination with Figure 1 it can be seen that the display panel may include a substrate 1, a light-emitting functional layer 2, and a color filter layer 6, where:

[0043] The light-emitting functional layer 2 may be located on one side of the substrate 1 and may include a plurality of light-emitting units 21 distributed in an array. The light-emitting unit 21 may include a bottom layer 212 and a light-emitting layer 213. The light-emitting layer 213 is located on the side of the bottom layer 212 facing away from the substrate 1. The thicknesses of the bottom layers 212 of two adjacent light-emitting units 21 are different. Each light-emitting layer 213 of each light-emitting unit 21 emits light of one color, and the light-emitting layers 213 can emit light of multiple colors;

[0044] The color filter layer 6 may be located on the side of the light-emitting functional layer 2 facing away from the substrate 1. The color filter layer 6 may include a plurality of filter units distributed at intervals. In the direction perpendicular to the substrate 1, each filter unit and each light-emitting unit 21 may be distributed in a one-to-one correspondence.

[0045] In the display panel of the embodiments of the present disclosure, on the one hand, since each light-emitting unit 21 emits light of multiple colors, full color can be achieved through the combination of light of multiple colors. On the other hand, since the thicknesses of the bottom layers 212 of two adjacent light-emitting units 21 are different, the heights of the light-emitting centers of two adjacent light-emitting units 21 are different, thereby generating spectra with different peak positions, resulting in a larger difference in color coordinates between two adjacent light-emitting units 21. Furthermore, when two adjacent light-emitting units 21 are combined to form a new color, the gamut area can be increased; at the same time, the ratio of the areas of two adjacent light-emitting units can avoid too fast visual attenuation, thereby improving color deviation and enhancing the display effect. In addition, the light emitted by the light-emitting unit 21 can be filtered by the color filter layer 6, which can increase the gamut while ensuring light output, further enhancing the display effect.

[0046] Figure 1 A schematic structural diagram of the display panel of the embodiments of the present disclosure is shown. The following will describe Figure 1 the light-emitting principle of the display panel in the embodiments of the present disclosure:

[0047] The display panel mainly includes a substrate 1, a light-emitting functional layer 2, and a color filter layer 6. The substrate 1 includes a substrate 11 and a pixel driving layer on one side of the substrate 11. The pixel driving layer includes a plurality of pixel driving circuits arranged side by side. The light-emitting functional layer 2 is disposed on the side of the pixel driving layer facing away from the substrate 11 and includes a plurality of light-emitting units 21 arranged in an array. Each light-emitting unit 21 is correspondingly connected to each pixel driving circuit. Electric power can be supplied to each light-emitting unit 21 through each pixel driving circuit, and each light-emitting unit 21 can be independently controlled to emit light in a timing manner, thereby displaying an image. For example, a plurality of light-emitting units 21 can be simultaneously powered on, and a plurality of light-emitting units 21 can be controlled to emit light simultaneously, so that light rays of multiple colors are combined, thereby displaying different colors, and thus realizing color display.

[0048] In an exemplary embodiment of the present disclosure, the substrate 11 can be a flat structure, which can be made of a hard material such as glass or a flexible material such as PI (polyimide). The substrate 11 can be a single-layer or multi-layer structure, and no special limitation is made here.

[0049] The pixel driving circuit can include transistors, and the transistors can be electrically connected to the light-emitting units 21 so as to control each light-emitting unit 21 correspondingly through each transistor, thereby displaying an image.

[0050] The transistor can include an active layer, a gate insulating layer, a gate electrode, and a source-drain layer. The gate insulating layer can include a first gate insulating layer and a second gate insulating layer. The active region can be doped multiple times to form the active layer. The active layer can be located on the side of the substrate 11 close to the light-emitting functional layer 2; the first gate insulating layer covers the active layer; the gate electrode is disposed on the side of the first gate insulating layer facing away from the substrate 11; the second gate insulating layer covers the gate electrode and the first gate insulating layer, and openings can be formed in the first gate insulating layer and the second gate insulating layer to form vias connecting the active region. The orthographic projection of the via on the substrate 11 does not overlap with the orthographic projection of the gate electrode on the substrate 11; the source-drain layer is formed on the side of the second gate insulating layer facing away from the substrate 11 and includes a source electrode and a drain electrode. The source electrode and the drain electrode can be connected to both ends of the active layer through vias penetrating the second gate insulating layer and the first gate insulating layer.

[0051] As Figure 1 shown, the substrate 1 can further include a planarization layer 12, and the planarization layer 12 can cover the pixel driving layer to eliminate the device step difference of the pixel driving layer. For example, the planarization layer 12 can be formed on the surface of the pixel driving layer facing away from the substrate 11 by physical vapor deposition, chemical vapor deposition, atomic layer deposition, etc. Of course, the planarization layer 12 can also be formed by other methods, and no special limitation is made on the formation method of the planarization layer 12 here.

[0052] The light-emitting functional layer 2 may be located on one side of the substrate 1. For example, the light-emitting functional layer 2 may be located on the side of the planarization layer 12 facing away from the pixel driving layer. In an exemplary embodiment of the present disclosure, the light-emitting functional layer 2 may include a pixel definition layer 22 and a plurality of light-emitting units 21 defined by the pixel definition layer 22. Each light-emitting unit 21 may be arranged in an array, and each light-emitting unit 21 may serve as a sub-pixel.

[0053] In an embodiment of the present disclosure, the light-emitting unit 21 may include a first electrode 211, an underlying layer 212, a light-emitting layer 213, and a second electrode 214, where:

[0054] The number of the first electrodes 211 is multiple, and the multiple first electrodes 211 may be spaced apart and arranged in an array on the surface of the planarization layer 12. The first electrode 211 may serve as the anode layer of the light-emitting unit 21, and its material may be a transparent conductive material or a light-shielding material, which is not specifically limited herein. For example, it may be ITO or AZO.

[0055] The pixel definition layer 22 and the first electrode 211 are located on the same side of the substrate 1 and have a plurality of first openings corresponding to and exposing each of the first electrodes 211. For example, both the pixel definition layer 22 and the first electrode 211 are located on the surface of the planarization layer 12 facing away from the substrate 11. It should be noted that during the device manufacturing process, a spacer layer 23 may be formed on the side of the pixel definition layer 22 facing away from the substrate 11 to avoid damaging the surface of the pixel definition layer 22 during the process of manufacturing subsequent thin films. The material of the spacer layer 23 may be the same as or different from the material of the pixel definition layer 22, which is not specifically limited herein.

[0056] The underlying layer 212 may be located on the side of the first electrode 211 facing away from the substrate 1 and may at least extend into each of the first openings of the pixel definition layer 22 and contact the first electrode 211 corresponding to each of the first openings. For example, the underlying layer 212 may include a single thin film or multiple thin films, which is not specifically limited herein. For example, it may be a hole transport layer or an electron blocking layer, or a multi-layer film layer composed of a hole transport layer and an electron blocking layer together. The structure of the underlying layer 212 is not specifically limited herein.

[0057] The light-emitting layer 213 may be located on the side of the underlying layer 212 facing away from the substrate 1 (i.e., each of the first electrodes 211 may be located on the side of the underlying layer 212 facing away from the light-emitting layer 213) and may at least extend into each of the first openings of the pixel definition layer 22 and contact the underlying layer 212 within each of the first openings.

[0058] The second electrode 214 may be located on a side of the light-emitting layer 213 facing away from the substrate 1. The second electrode 214 may extend into the first opening and cover at least an overlapping portion of the light-emitting layer 213, the underlying layer 212, and the first electrode 211. The second electrode 214 may be a metal oxide electrode, a metal electrode, a metal alloy electrode, or a composite electrode formed by a combination of a metal and a metal oxide, and is not particularly limited herein. The second electrode 214 may serve as the cathode layer of the light-emitting unit 21. The regions of the first electrode 211, the underlying layer 212, the light-emitting layer 213, and the second electrode 214 corresponding to the first opening of the pixel defining layer 22 constitute a light-emitting unit 21, that is, an OLED light-emitting unit 21. A voltage may be applied to the first electrode 211 and the second electrode 214, so that the light-emitting unit 21 emits light.

[0059] In an exemplary embodiment of the present disclosure, the light-emitting layer 213 of each light-emitting unit 21 may emit light of one color, and the light-emitting layers 213 can emit light of multiple different colors. The light emitted by each light-emitting unit 21 may be combined together, and each light-emitting unit 21 can be independently controlled to emit light in a timing manner, thereby realizing the regulation of the emission color. For example, the light-emitting device layer may include a red light-emitting unit 21, a green light-emitting unit 21, and a blue light-emitting unit 21. The red light-emitting unit 21 (R), the green light-emitting unit 21 (G), and the blue light-emitting unit 21 (B) may be combined together to realize the regulation of the emission color.

[0060] In an exemplary embodiment of the present disclosure, the thicknesses of the underlying layers 212 of two adjacent light-emitting units 21 are different, so that the heights at which the light-emitting centers of the two adjacent light-emitting units 21 are located are different, thereby generating spectra with different peak positions, resulting in a larger difference in the color coordinates of the two adjacent light-emitting units 21. Furthermore, when the two adjacent light-emitting units 21 are respectively combined with other light-emitting units 21 to form new colors, color gamuts with different areas are formed. The ratio of the different areas of the two adjacent light-emitting units 21 causes different visual attenuations of the two adjacent light-emitting units 21, which can avoid too fast visual attenuation, thereby improving color deviation and enhancing the display effect.

[0061] In an exemplary embodiment of the present disclosure, the light-emitting functional layer 2 may include a first light-emitting unit and a second light-emitting unit. The thickness of the underlying layer 212 of the first light-emitting unit may be greater than the thickness of the underlying layer 212 of the second light-emitting unit, so that the heights at which the light-emitting centers of the first light-emitting unit and the second light-emitting unit are located are different, thereby generating spectra with different peak positions. Furthermore, the difference in the color coordinates of the first light-emitting unit and the second light-emitting unit becomes larger, so that the color gamut areas of the new colors respectively formed by the first light-emitting unit and the second light-emitting unit are different. At the same time, the ratio of the different areas of two adjacent light-emitting units 21 can avoid too fast visual attenuation, thereby improving color deviation and enhancing the display effect.

[0062] During the preparation process, methods such as vacuum evaporation, magnetron sputtering, physical vapor deposition, chemical vapor deposition, or atomic layer deposition can be used to form the bottom layer 212. In one embodiment, the bottom layer 212 can be formed by vacuum evaporation. For example, the bottom layer 212 corresponding to the first light-emitting unit and the bottom layer 212 corresponding to the second light-emitting unit can be respectively evaporated through two different evaporation chambers, thereby obtaining two bottom layers 212 with different thicknesses. Of course, bottom layers 212 with different thicknesses can also be prepared in the same evaporation chamber. For example, during the evaporation of the bottom layer 212, two metal mask plates with openings at different positions can be used in the same evaporation chamber, and then two bottom layers 212 with different thicknesses can be obtained.

[0063] In an exemplary embodiment of the present disclosure, the light emitted by the first light-emitting unit and the second light-emitting unit can have the same color. Furthermore, the bottom layer 212 of the light-emitting unit 21 of the same color can be designed differently, and the color coordinates corresponding to this color can be increased. Of course, the first light-emitting unit and the second light-emitting unit can also be light-emitting units 21 with different emission colors, and no special limitation is imposed on the emission colors of the first light-emitting unit and the second light-emitting unit herein.

[0064] In one embodiment, as Figure 2 and Figure 3 shown, the light-emitting functional layer 2 can include a plurality of red light-emitting units (R), a plurality of green light-emitting units (G), and a plurality of blue light-emitting units (B). One red light-emitting unit (R), one green light-emitting unit (G), and one blue light-emitting unit (B) can be combined to form a color regulation group, and color regulation is performed through this color regulation group. Adjacent color regulation groups can share one or two colors of light-emitting units 21.

[0065] The light-functional layer 2 can include one red light-emitting unit (R), two green light-emitting units (G), and one blue light-emitting unit (B). The light emitted by the first light-emitting unit and the second light-emitting unit can both be green (G). The Figure 4 green light-emitting unit (G) located in the lower left can be used as the first light-emitting unit (G 1 ), and the green light-emitting unit (G) located in the upper right can be used as the second light-emitting unit (G 2 ). RG 1 B constitutes the first color regulation group, and RG 2 B constitutes the second color regulation group. The first color regulation group and the second color regulation group share the red light-emitting unit (R) and the blue light-emitting unit (B).

[0066] The thickness of the bottom layer 212 of the first light-emitting unit (G 1 ) is greater than the thickness of the bottom layer 212 of the second light-emitting unit (G 2 ), so the first light-emitting unit (G 1) is higher than the height of the light-emitting layer 213 of the second light-emitting unit (G 2 ) of the light emitting layer 213, so that the first light emitting unit (G 1 ) has a color coordinate greater than that of the second light-emitting unit (G 2 ) color coordinates. At this time, Figure 5 As shown, the first light emitting unit (G 1 ), the area of ​​the color gamut 1 composed of the red light emitting unit (R) and the blue light emitting unit (B); the area of ​​the second light emitting unit (G 2 ), the area of ​​color gamut 2 composed of red light emitting units (R) and blue light emitting units (B); at this time, the color gamut area of ​​the light-emitting functional layer 2 is the area covered by the quadrilateral composed of the color coordinates of red light, the color coordinates of blue light, the color coordinates of green light in color gamut 1 and the color coordinates of green light in color gamut 2. The area that can be achieved by the light emission of the entire device includes the areas of color gamut 1 and color gamut 2, thereby making the color gamut volume of the entire device reach 94.2% under the BT.2020 standard; compared with the device without improvement, its color gamut is improved by 7.3%.

[0067] It should be noted that the first light emitting unit (G 1 ) and the second light emitting unit (G 2 ) area, so that the first light emitting unit (G 1 ) is larger than the area of ​​the second light emitting unit (G 2 ) area, thereby improving the visual attenuation of the device by increasing the luminous brightness, thereby improving the effect of the thickness change of the bottom layer 212 on the color shift of white light. In the above embodiment, the overlapping area of ​​color gamut 1 and color gamut 2 accounts for 96.7% of color gamut 1 and 92.3% of color gamut 2. When it is necessary to display the area exclusively occupied by color gamut 1 and color gamut 2, the green light pixels cannot be shared.

[0068] It should be noted that the light emitted by the first light emitting unit and the second light emitting unit may also be red (R) or blue (B). When the light emitted by the first light emitting unit and the second light emitting unit are both red or blue, the color gamut diagram after differential design of the bottom layer thickness is as follows: Figure 6 shown.

[0069] In an exemplary embodiment of the present disclosure, the host materials of the light-emitting layers 213 of two adjacent light-emitting units 21 are different, which increases the color coordinate difference between the two adjacent light-emitting units 21, thereby increasing the color gamut area of the device. For example, the host material of the light-emitting layer 213 of the first light-emitting unit is different from that of the light-emitting layer 213 of the second light-emitting unit, and the host material of the light-emitting layer 213 of the first light-emitting unit is the same as that of the light-emitting layer 213 of the second light-emitting unit. As a result, the color coordinate difference between the first light-emitting unit and the second light-emitting unit becomes larger, thereby increasing the color gamut area of the light-emitting functional layer 2 composed of the first light-emitting unit, the second light-emitting unit, and other light-emitting units 21, and improving the device resolution.

[0070] In an exemplary embodiment of the present disclosure, the doping concentrations of the host materials of the light-emitting layers 213 of two adjacent light-emitting units 21 are different, which increases the color coordinate difference between the two adjacent light-emitting units 21, further increasing the color gamut area of the device and reducing visual attenuation. For example, the host material of the light-emitting layer 213 of the first light-emitting unit is the same as that of the light-emitting layer 213 of the second light-emitting unit, and the host material of the light-emitting layer 213 of the first light-emitting unit is also the same as that of the light-emitting layer 213 of the second light-emitting unit. The doping concentration of the host material of the light-emitting layer 213 of the first light-emitting unit is greater than that of the light-emitting layer 213 of the second light-emitting unit, which makes the color coordinate of the first light-emitting unit greater than that of the second light-emitting unit, further increasing the color gamut area of the light-emitting functional layer 2 composed of the first light-emitting unit, the second light-emitting unit, and other light-emitting units 21, and improving the device resolution. For example, the doping concentration of the host material of the light-emitting layer 213 of the second light-emitting unit is greater than 2%, and the doping concentration of the host material of the light-emitting layer 213 of the first light-emitting unit is less than 10%, and the doping concentration of the host material of the light-emitting layer 213 of the first light-emitting unit is greater than that of the light-emitting layer 213 of the second light-emitting unit.

[0071] It should be noted that the material of the light-emitting layer 213 of the first light-emitting unit may also be the same as that of the light-emitting layer 213 of the second light-emitting unit, and no special limitation is imposed on the material of the light-emitting layer 213 of the first light-emitting unit and the material of the light-emitting layer 213 of the second light-emitting unit here.

[0072] In an exemplary embodiment of the present disclosure, the thicknesses of the second electrodes 214 of two adjacent light-emitting units 21 are different, resulting in a difference in the light transmittance of the two adjacent light-emitting units 21, which can further increase the color gamut area of the device. For example, the thickness of the second electrode 214 of the first light-emitting unit is less than the thickness of the second electrode 214 of the second light-emitting unit, so that the transmittance of the first light-emitting unit is greater than that of the second light-emitting unit, and the color coordinates of the first light-emitting unit are greater than those of the second light-emitting unit. The color gamut area of the device composed of the first light-emitting unit, the second light-emitting unit, and other light-emitting units 21 is greater than that of the device composed of a plurality of light-emitting units 21 with the same second electrode 214.

[0073] For example, the thickness of the second electrode 214 of the first light-emitting unit is greater than 10 nm, the thickness of the second electrode 214 of the second light-emitting unit is less than 15 nm, and the thickness of the second electrode 214 of the first light-emitting unit is less than the thickness of the second electrode 214 of the second light-emitting unit.

[0074] The color filter layer 6 is located on the side of the light-emitting functional layer 2 away from the substrate 1. The color filter layer 6 includes a plurality of filter units, and the filter units can be arranged at intervals and are distributed in an array on the side of the light-emitting functional layer 2 away from the substrate 1. In an exemplary embodiment of the present disclosure, the number of filter units can be the same as the number of light-emitting units 21, and in the direction perpendicular to the substrate 1, each filter unit can be distributed in one-to-one correspondence with each light-emitting unit 21.

[0075] It should be noted that the shape of the filter unit can be the same as that of the light-emitting unit 21, and its size can be larger than that of the light-emitting unit 21, so as to ensure that the light emitted by the light-emitting unit 21 can pass through the corresponding filter unit for filtering before being emitted. The filtering color of the filter unit can be the same as the light-emitting color of the light-emitting unit 21. For example, when the light emitted by the light-emitting unit 21 is green, the corresponding filter unit can be a green light filter unit; when the light emitted by the light-emitting unit 21 is red, the corresponding filter unit can be a red light filter unit; when the light emitted by the light-emitting unit 21 is blue, the corresponding filter unit can be a blue light filter unit.

[0076] In an exemplary embodiment of the present disclosure, the material of the filter unit (CF 1 ) corresponding to the first light-emitting unit can be denoted as the first filter material, and the material of the filter unit (CF 2 ) corresponding to the second light-emitting unit can be denoted as the second filter material. The peak of the transmittance spectrum of the first filter material is on the right side of the peak of the transmittance spectrum of the second filter material, so as to increase the color gamut area composed of CF 1 and CF 2The difference in the color coordinates of the emitted light further increases the color gamut area, and by matching the areas of adjacent light-emitting units, the visual attenuation is slowed down, the color deviation is improved, and the display effect is enhanced.

[0077] In an exemplary embodiment of the present disclosure, the thickness of the color filter unit (CF 1 ) corresponding to the first light-emitting unit (G 1 ) is not greater than the thickness of the color filter unit (CF 2 ) corresponding to the second light-emitting unit (G 2 ), and the thickness of the color filter unit (CF 1 ) corresponding to the first light-emitting unit (G 1 ) is greater than 2 um; the thickness of the color filter unit (CF 2 ) corresponding to the second light-emitting unit (G 2 ) is less than 4 um. For example, the thickness of the color filter unit (CF 1 ) corresponding to the first light-emitting unit (G 1 ) is 2 um, and the thickness of the color filter unit (CF 2 ) corresponding to the second light-emitting unit (G 2 ) is 4 um; the thickness of the color filter unit (CF 1 ) corresponding to the first light-emitting unit (G 1 ) is 2.5 um, and the thickness of the color filter unit (CF 2 ) corresponding to the second light-emitting unit (G 2 ) is 3.5 um.

[0078] When the first light-emitting unit and the second light-emitting unit are respectively lit, the color gamut map obtained after the differential design of the materials of CF 1 and CF 2 is as shown in Figure 7 . In Figure 7 , the color coordinates of CF1 are greater than those of CF2, and the color coordinates of the emitted spectrum of the first light-emitting unit (G 1 ) are greater than the color coordinates of the emitted spectrum of the second light-emitting unit (G 2 ); after the combination, the color gamut that the overall device can display is larger than that of the scheme before the differential design. On the basis of the differential design of the first light-emitting unit (G 1 ) and the second light-emitting unit (G 2 ), the visual attenuation curve obtained after the differential design of the materials of CF 1 and CF 2 is as shown in Figure 8 . In Figure 8 , the device including the material of CF1 has a slower visual attenuation, and the device including the material of CF2 has a faster visual attenuation. After the combination of the two, the overall visual attenuation of the device is slower.

[0079] In an exemplary embodiment of the present disclosure, the thickness of the color filter unit (CF 1 ) corresponding to the first light-emitting unit is less than or equal to the thickness of the color filter unit (CF 2 ) corresponding to the second light-emitting unit, so that the transmittance of the light emitted by the first light-emitting unit through the CF 1 is greater than or equal to the transmittance of the light emitted by the second light-emitting unit through the CF 2 .

[0080] In an exemplary embodiment of the present disclosure, the display panel of the present disclosure may further include a black matrix layer 5, and the black matrix layer 5 can block the light at the gap between two adjacent light-emitting units 21 to avoid color crosstalk. The black matrix layer 5 may be located on the side of the light-emitting functional layer 2 away from the substrate 1, and has a plurality of second openings exposing each light-emitting unit 21. The number of the second openings may be the same as the number of the light-emitting units 21, and each second opening may expose each light-emitting unit 21 in a one-to-one correspondence; at the same time, since the number of the color filter units is the same as the number of the light-emitting units 21, the number of the second openings is also the same as the number of the color filter units.

[0081] The color filter layer 6 may be located on the side of the black matrix layer 5 away from the light-emitting functional layer 2. Each color filter unit may be distributed corresponding to each second opening and may fill each second opening in a one-to-one correspondence. To prevent light leakage at the contact surface between the color filter unit and the black matrix layer 5, each color filter unit may extend from the inside of the second opening to the outside thereof and at least partially overlap with the black matrix layer 5.

[0082] In an exemplary embodiment of the present disclosure, the distance (D1) between the boundary of the second opening corresponding to the first light-emitting unit and the boundary of the first opening corresponding thereto is greater than the distance (D2) between the boundary of the second opening corresponding to the second light-emitting unit and the boundary of the first opening corresponding thereto, so as to ensure that the light output of the first light-emitting unit is more than that of the second light-emitting unit.

[0083] In an exemplary embodiment of the present disclosure, the display panel of the present disclosure may further include a packaging layer 3. The packaging layer 3 may be located between the light-emitting functional layer 2 and the black matrix layer 5. The packaging layer 3 may include a first inorganic layer and a second inorganic layer. The second inorganic layer may be located on the side of the first inorganic layer away from the substrate 1. The water and oxygen in the air can be blocked by the first inorganic layer and the second inorganic layer. In this process, the first inorganic layer and the second inorganic layer can form a double barrier to external water and oxygen, improving the packaging effect. The packaging layer 3 may further include an organic layer. The organic layer may be located between the first inorganic layer and the second inorganic layer. The stress of the first inorganic layer and the second inorganic layer can be released through the organic layer, avoiding peeling due to the pulling caused by stress between the first inorganic layer and the film layer below it, and extending the service life of the display panel. A protective layer 7 may be provided on the surface of the color filter layer 6 away from the substrate 1. The protective layer 7 may cover the parts of the color filter layer 6 and the black matrix layer 5 that are exposed outside the filter units to protect the color filter layer 6 and the black matrix layer 5.

[0084] In an exemplary embodiment of the present disclosure, the display panel of the present disclosure may further include a touch control electrode layer 4. The touch control electrode layer 4 may be in a grid shape. The touch control electrode layer 4 may be located between the packaging layer 3 and the black matrix layer 5. Touch control can be performed through the touch control electrode layer 4 to achieve the touch function of the display panel.

[0085] The present disclosure also provides a manufacturing method of a display panel. The display panel may be a micro-OLED display panel. Of course, it may also be other display panels, which are not specifically limited herein. Figure 9 The flowchart of the manufacturing method of the display panel in the embodiment of the present disclosure is shown. Combining Figure 9 it can be known that the manufacturing method of the display panel of the present disclosure may include step S110-step S130, where:

[0086] Step S110, providing a substrate 1;

[0087] Step S120, forming a light-emitting functional layer 2 on one side of the substrate 1. The light-emitting functional layer 2 includes a plurality of light-emitting units 21 distributed in an array. The light-emitting unit 21 includes a bottom layer 212 and a light-emitting layer 213. The light-emitting layer 213 is located on the side of the bottom layer 212 away from the substrate 1. The thicknesses of the bottom layers 212 of adjacent two light-emitting units 21 are different. Each light-emitting layer 213 of each light-emitting unit 21 emits light of one color, and the light-emitting layers 213 can emit light of multiple colors;

[0088] Step S130, forming a color filter layer 6 on the side of the light-emitting functional layer 2 away from the substrate 1. The color filter layer 6 includes a plurality of filter units distributed at intervals. In the direction perpendicular to the substrate 1, each of the filter units and each of the light-emitting units 21 are distributed in one-to-one correspondence.

[0089] The beneficial effects of the manufacturing method of the display panel according to the embodiments of the present disclosure have been described in detail in the above embodiments of the display panel, and will not be elaborated herein.

[0090] It should be noted that although the steps of the manufacturing method of the display panel in the present disclosure are described in a specific order in the drawings, this does not require or imply that these steps must be performed in that specific order, or that all the steps shown must be performed to achieve the desired result. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution, etc.

[0091] The embodiments of the present disclosure further provide a display device, which may include the display panel of any of the above embodiments. Its structure and beneficial effects can be referred to the embodiments of the above display panel, and will not be elaborated herein. The display device according to the embodiments of the present disclosure may be a device for displaying images such as a mobile phone, a display screen, a tablet computer, a television, a microdisplay device, etc., and will not be listed herein.

[0092] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

Claims

1. A display panel, It is characterized in that include: substrate; A light-emitting functional layer, located on one side of the substrate, and comprising a plurality of light-emitting units distributed in an array, wherein the light-emitting unit comprises a bottom layer and a light-emitting layer, wherein the light-emitting layer is located on a side of the bottom layer away from the substrate, and the thickness of the bottom layers of two adjacent light-emitting units is different, and the light-emitting layer of each light-emitting unit emits light of one color, and each light-emitting layer can emit light of multiple colors; A color filter layer, located on a side of the light-emitting functional layer away from the substrate, the color filter layer comprising a plurality of filter units distributed at intervals, and in a direction perpendicular to the substrate, each of the filter units is distributed in a one-to-one correspondence with each of the light-emitting units; The light-emitting functional layer includes a first light-emitting unit and a second light-emitting unit, wherein the thickness of the bottom layer of the first light-emitting unit is greater than the thickness of the bottom layer of the second light-emitting unit; The material of the filter unit corresponding to the first light-emitting unit is a first filter material, the material of the filter unit corresponding to the second light-emitting unit is a second filter material, and the peak of the transmission spectrum of the first filter material is on the right side of the peak of the transmission spectrum of the second filter material.

2. The display panel according to claim 1, It is characterized in that The light-emitting functional layer further comprises a plurality of first electrodes and a pixel definition layer, wherein the first electrodes are spaced apart and are correspondingly located on a side of the bottom layer away from the light-emitting layer; the pixel definition layer and the first electrodes are arranged on the same side of the substrate and have a plurality of first openings exposing the first electrodes; The display panel further includes: A black matrix layer is located on the side of the light-emitting functional layer away from the substrate, and has a plurality of second openings corresponding to each other to expose the light-emitting units, wherein the distance between the boundary of the second opening corresponding to the first light-emitting unit and the boundary of the first opening corresponding thereto is greater than the distance between the boundary of the second opening corresponding to the second light-emitting unit and the boundary of the first opening corresponding thereto, and the color filter layer is located on the side of the black matrix layer away from the light-emitting functional layer.

3. The display panel according to claim 1, It is characterized in that The light emitted by the first light emitting unit and the light emitted by the second light emitting unit have the same color.

4. The display panel according to claim 3, It is characterized in that The colors of the light emitted by the first light emitting unit and the second light emitting unit are both green.

5. The display panel according to claim 1, It is characterized in that The thickness of the filter unit corresponding to the first light-emitting unit is less than or equal to the thickness of the filter unit corresponding to the second light-emitting unit.

6. The display panel according to claim 1, It is characterized in that The material of the light-emitting layer of the first light-emitting unit is different from the material of the light-emitting layer of the second light-emitting unit.

7. The display panel according to claim 2, It is characterized in that The display panel further includes: The encapsulation layer is located between the light-emitting functional layer and the black matrix layer.

8. A method for manufacturing a display panel, It is characterized in that include: providing a substrate; A light-emitting functional layer is formed on one side of the substrate, the light-emitting functional layer includes a plurality of light-emitting units distributed in an array, the light-emitting unit includes a bottom layer and a light-emitting layer, the light-emitting layer is located on a side of the bottom layer away from the substrate, the bottom layers of two adjacent light-emitting units have different thicknesses, the light-emitting layer of each light-emitting unit emits light of one color, and each light-emitting layer can emit light of multiple colors; A color filter layer is formed on a side of the light-emitting functional layer away from the substrate, wherein the color filter layer comprises a plurality of filter units distributed at intervals, and in a direction perpendicular to the substrate, each of the filter units is distributed in a one-to-one correspondence with each of the light-emitting units; The light-emitting functional layer includes a first light-emitting unit and a second light-emitting unit, wherein the thickness of the bottom layer of the first light-emitting unit is greater than the thickness of the bottom layer of the second light-emitting unit; The material of the filter unit corresponding to the first light-emitting unit is a first filter material, the material of the filter unit corresponding to the second light-emitting unit is a second filter material, and the peak of the transmission spectrum of the first filter material is on the right side of the peak of the transmission spectrum of the second filter material.

9. A display device, It is characterized in that A display panel comprising any one of claims 1 to 7.

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