Display panel and display device
By setting filters in the red and blue sub-pixels of the white OLED display panel and using electrode structures with different transmittances, combined with a microcavity structure, the color shift problem of the white OLED display panel was solved, achieving a display effect with high brightness and low power consumption.
Patent Information
- Application Number
- CN202520062883.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-10
AI Technical Summary
Existing white OLED display panels suffer from color shift issues when using color filter lenses, which affects the display effect.
By setting filters on the side of the light-emitting devices of red and blue sub-pixels away from the substrate and using electrode structures with different transmittances, combined with the first microcavity and the second microcavity structure, the light intensity of red and blue sub-pixels is weakened, the light intensity of green sub-pixels is enhanced, color shift is improved, brightness is increased and power consumption is reduced.
It effectively improved the color shift of red and blue subpixels, increased the brightness of the display panel and reduced power consumption, while maintaining a high screen-to-body ratio.
Smart Images
Figure CN223829743U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure belongs to the technical field of display, and particularly relates to a display panel and a display device. BACKGROUND
[0002] Organic Light-Emitting Diode (OLED) is the most new generation display technology, and its display performance is relatively excellent. Among them, the display panel formed by combining the color film of the white light OLED device (WOLED for short) has a high screen ratio. However, although the color film has a filtering effect, there is still a color deviation problem caused by some structures. CONTENT OF THE UTILITY MODEL
[0003] The present disclosure aims to at least solve one of the technical problems existing in the prior art, and provide a display panel and a display device.
[0004] In a first aspect, a technical solution adopted to solve the technical problems of the present disclosure is a display panel, comprising a substrate, a red sub-pixel, a green sub-pixel and a blue sub-pixel arranged on the substrate, the red sub-pixel comprising a first light-emitting device emitting white light and a red filter arranged on the side of the first light-emitting device away from the substrate, the green sub-pixel comprising a second light-emitting device emitting white light and a green filter arranged on the side of the second light-emitting device away from the substrate, and the blue sub-pixel comprising a third light-emitting device emitting white light and a blue filter arranged on the side of the third light-emitting device away from the substrate.
[0005] The first light-emitting device, the second light-emitting device and the third light-emitting device each comprise a first electrode, a light-emitting unit and a second electrode arranged in sequence in the direction away from the substrate.
[0006] The second electrode of the second light-emitting device comprises a first sub-electrode and a second sub-electrode arranged in layers in the direction away from the substrate; one of the first sub-electrode and the second sub-electrode has a light transmittance greater than that of the other; the sub-electrode with a high light transmittance is denoted as a first light transmittance film, and the sub-electrode with a low light transmittance is denoted as a second light transmittance film.
[0007] One of the second electrode of the first light-emitting device and the second electrode of the third light-emitting device is a third light transmittance film, and the other at least comprises a fourth light transmittance film.
[0008] The light transmittance of the third light transmittance film and the fourth light transmittance film is greater than that of the second light transmittance film.
[0009] In some embodiments, the second electrode of the first light emitting device is the third light transmissive film, and the second electrode of the third light emitting device is a fourth light transmissive film.
[0010] The first light transmissive film, the third light transmissive film, and the fourth light transmissive film have the same light transmittance.
[0011] In some embodiments, a distance between a contour boundary of a projection of the second light transmissive film on the substrate to a contour boundary of a projection of the first electrode of the second light emitting device on the substrate is a first distance; a distance between the contour boundary of the projection of the second light transmissive film on the substrate to a contour boundary of a projection of the first electrode of the first light emitting device on the substrate is a second distance; and a distance between the contour boundary of the projection of the second light transmissive film on the substrate to a contour boundary of a projection of the first electrode of the third light emitting device on the substrate is a third distance.
[0012] The first distance is greater than the second distance, and the first distance is greater than the third distance.
[0013] In some embodiments, the second electrode of the first light emitting device is the third light transmissive film, and the second electrode of the third light emitting device includes a third sub-electrode and a fourth sub-electrode arranged in sequence in a direction away from the substrate.
[0014] One of the third sub-electrode and the fourth sub-electrode has a light transmittance greater than that of the other; the sub-electrode with the greater light transmittance is the fourth light transmissive film, and the sub-electrode with the lower light transmittance is a fifth light transmissive film.
[0015] In some embodiments, the second electrode of the third light emitting device is the third light transmissive film, and the second electrode of the first light emitting device includes a third sub-electrode and a fourth sub-electrode arranged in sequence in a direction away from the substrate.
[0016] One of the third sub-electrode and the fourth sub-electrode has a light transmittance greater than that of the other; the sub-electrode with the greater light transmittance is the fourth light transmissive film, and the sub-electrode with the lower light transmittance is a fifth light transmissive film.
[0017] In some embodiments, the fifth light transmissive film has the same reflectivity as the second light transmissive film.
[0018] In some embodiments, the second light transmissive film and the fifth light transmissive film are connected as an integral structure.
[0019] In some embodiments, the first sub-electrode is the first light-transmissive film, the second sub-electrode is the second light-transmissive film, the third sub-electrode is the fourth light-transmissive film, and the fourth sub-electrode is the fifth light-transmissive film.
[0020] The display panel further includes a suppression layer disposed on a side of the first light-transmissive film, the third light-transmissive film, and the fourth light-transmissive film away from the substrate.
[0021] The suppression layer has a first opening and a second opening extending through a thickness direction thereof; the second light-transmissive film is defined within the first opening, and the fifth light-transmissive film is defined within the second opening.
[0022] In some embodiments, the second light-transmissive film and the fifth light-transmissive film are each made of an alloy material having magnesium and silver, or are each made of an alloy material having magnesium and aluminum.
[0023] In some embodiments, the first sub-electrode is the first light-transmissive film, and the second sub-electrode is the second light-transmissive film.
[0024] The display panel further includes a suppression layer disposed on a side of the first light-transmissive film, the third light-transmissive film, and the fourth light-transmissive film away from the substrate.
[0025] The suppression layer has a first opening extending through a thickness direction thereof, and the second light-transmissive film is defined within the first opening.
[0026] In some embodiments, the second light-transmissive film is made of an alloy material having magnesium and silver, or is made of an alloy material having magnesium and aluminum.
[0027] In some embodiments, the first light-transmissive film, the third light-transmissive film, and the fourth light-transmissive film each have a light transmittance greater than or equal to 79%.
[0028] In some embodiments, the first electrode of the second light-emitting device includes, in sequence from a direction away from the substrate, a first sub-layer, a second sub-layer, and a third sub-layer, the third sub-layer being electrically connected to the first sub-layer; the first electrode of the first light-emitting device includes, in sequence from the direction away from the substrate, a fourth sub-layer and a fifth sub-layer; and the first electrode of the third light-emitting device includes, in sequence from the direction away from the substrate, a sixth sub-layer and a seventh sub-layer.
[0029] The first sub-layer, the fourth sub-layer, and the sixth sub-layer are each made of a metal, the third sub-layer, the fifth sub-layer, and the seventh sub-layer are each made of a transparent metal oxide, and the second sub-layer is made of a transparent insulating material.
[0030] In some embodiments, the material of the first sub-layer, the fourth sub-layer and the sixth sub-layer are all the same; the material of the third sub-layer, the fifth sub-layer and the seventh sub-layer are all the same.
[0031] In a second aspect, the embodiments of the present disclosure further provide a display device, comprising the display panel according to any one of the first aspect. BRIEF DESCRIPTION OF DRAWINGS
[0032] Figure 1 The light spectrum diagram of the display panel under the first microcavity structure.
[0033] Figure 2 The light spectrum diagram of the display panel under the second microcavity structure.
[0034] Figure 3 The schematic diagram of the display panel under Example 1 provided by the embodiments of the present disclosure.
[0035] Figure 4 The schematic diagram of the display panel under Example 2 provided by the embodiments of the present disclosure.
[0036] Figure 5a The schematic diagram between the second light-transmitting film and the first electrode of each light-emitting device in the display panel under Example 1 provided by the embodiments of the present disclosure.
[0037] Figure 5b The schematic diagram between the second light-transmitting film and the first electrode of each light-emitting device in the display panel under Example 2 provided by the embodiments of the present disclosure.
[0038] Figure 6 The schematic diagram of the display panel under Example 3 provided by the embodiments of the present disclosure.
[0039] Figure 7 The schematic diagram of the display panel under Example 4 provided by the embodiments of the present disclosure.
[0040] Figure 8 The schematic diagram of the display panel under Example 5 provided by the embodiments of the present disclosure.
[0041] Figure 9 The schematic diagram of the display panel under Example 6 provided by the embodiments of the present disclosure.
[0042] Figure 10 The schematic diagram of the display panel under Example 7 provided by the embodiments of the present disclosure.
[0043] Figure 11 The schematic diagram of the display panel under Example 8 provided by the embodiments of the present disclosure.
[0044] Figure 12A schematic diagram of the display panel of Example 9 provided by the embodiments of the present disclosure.
[0045] Figure 13 A graph of the relationship between the transmittance and thickness of the magnesium and silver alloy material provided by the embodiments of the present disclosure.
[0046] Figure 14 A structural diagram of the anode of different sub-pixels provided by the embodiments of the present disclosure.
[0047] Figure 15 A film layer diagram of the light emitting unit provided by the embodiments of the present disclosure. DETAILED DESCRIPTION
[0048] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the following will combine the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The components of the embodiments of the present disclosure described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure provided in the drawings is not intended to limit the scope of the claimed present disclosure, but only represents selected embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present disclosure.
[0049] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood as the usual meaning understood by those skilled in the art to which the present disclosure belongs. The terms "first", "second" and the like used in the present disclosure do not represent any order, number or importance, but are only used to distinguish different components. Similarly, the terms "one", "an" or "the" and the like do not represent a quantity limitation, but represent the existence of at least one. The terms "including", "containing" and the like mean that the elements or objects before the terms cover the elements or objects listed after the terms and their equivalents, without excluding other elements or objects. The terms "connected" or "connected" and the like are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships may also be changed accordingly.
[0050] The "multiple or several" mentioned in the present disclosure refers to two or more than two. The "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A existing alone, A and B existing simultaneously, and B existing alone. The character " / " generally represents that the front and rear associated objects are in an "or" relationship.
[0051] In order to improve the screen ratio of the OLED display panel, a white light OLED device can be used, and a color film is arranged on the white light OLED device. Different color light emitting areas are formed by using the color film to filter light to replace different color light emitting devices, for example, a red light emitting area replaces a red light emitting device, a green light emitting area replaces a green light emitting device, and a blue light emitting area replaces a blue light emitting device. Since a large number of light emitting units of the white light OLED device are uniformly and fully evaporated by using an open mask (OM) evaporation process, the distance between adjacent devices can be reduced, the pixel density (PPI) is improved, and the screen ratio is further improved.
[0052] In the related art, the display panel includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel. The red sub-pixel includes a white light OLED device and a red light filter arranged on a side of the white light OLED device away from a substrate. The green sub-pixel includes a white light OLED device and a green light filter arranged on a side of the white light OLED device away from the substrate. The blue sub-pixel includes a white light OLED device and a blue light filter arranged on a side of the white light OLED device away from the substrate. The microcavity lengths corresponding to the red, green, and blue three bands satisfy L = m x λ / 2, where L represents the microcavity length, λ represents the wavelength, and m is an integer. Since the microcavity lengths corresponding to the red, green, and blue three bands are different, in order to ensure that the red, green, and blue three colors of light emitted by the red sub-pixel, the green sub-pixel, and the blue sub-pixel are emitted at the same time, the microcavity effect of the white light OLED device needs to be weakened as much as possible. However, the white light OLED display panel weakens the microcavity effect at the same time, which will restrict the high brightness and low power consumption of the related product. In one case, the red sub-pixel, the green sub-pixel, and the blue sub-pixel all adopt a first microcavity structure, and the first microcavity structure is arranged on the light emitting unit, which can change the resonance microcavity of the sub-pixel, thereby improving the light emitting efficiency of the sub-pixel, to achieve the effect of improving the brightness and reducing the power consumption of the product. The principle of the first microcavity structure enhancing the light emitting efficiency is that the first microcavity structure is a composite film layer obtained by stacking a film layer with high light transmission performance and a film layer with light reflection performance, which can partially transmit and partially reflect the white light emitted by the white light OLED device, and the reflected white light is reflected by the bottom film layer (for example, a reflective anode) and then returns to the composite film layer, which is repeated, thereby improving the forward light emitting efficiency of the sub-pixel. Figure 1 The light spectrum diagram of the display panel under the first microcavity structure is as follows: Figure 1As shown in the figure, the abscissa represents wavelength (unit: nanometer nm), the ordinate represents light intensity, and 0°, 30° and 60° viewing angles are taken as examples. Since the microcavity cavity length of the second period of the red sub-pixel is similar to the microcavity cavity length of the third period of the blue sub-pixel, the red sub-pixel and the blue sub-pixel simultaneously adopt the first microcavity structure, and compared with the second microcavity structure, the forward efficiency of red light and blue light is improved, but the viewing angle deviation is poor, for example, although there is a filter of the color film, the blue light still has red light at about 620 nm. In another case, the red sub-pixel, the green sub-pixel and the blue sub-pixel all adopt the second microcavity structure. The second microcavity structure is a film layer structure with high light transmission performance. Figure 2 The light spectrum diagram of the display panel under the second microcavity structure is as shown in the figure, Figure 2 As shown in the figure, the abscissa represents wavelength (unit: nanometer nm), the ordinate represents light intensity, and 0°, 30° and 60° viewing angles are taken as examples. The forward light efficiency of the white light OLED device adopting the second microcavity structure is weaker than that of the white light OLED device adopting the first microcavity structure, but the viewing angle deviation of the white light OLED device adopting the second microcavity structure is better. The red sub-pixel and the blue sub-pixel adopt the second microcavity structure, and the wavelengths corresponding to the wave peak points under the three viewing angles are approximately the same, so the red sub-pixel and the blue sub-pixel adopting the second microcavity structure have no color deviation or small color deviation, which does not affect the display effect.
[0053] In view of this, the display panel provided by the embodiments of the present disclosure substantially improves the color deviation of the red sub-pixel and the blue sub-pixel by weakening the light intensity of at least one of the red sub-pixel and the blue sub-pixel, while enhancing the light intensity of the green sub-pixel to ensure the effects of high brightness and low power consumption.
[0054] Figure 3 The schematic diagram of the display panel under example 1 provided by the embodiments of the present disclosure is as shown in the figure, Figure 4 The schematic diagram of the display panel under example 2 provided by the embodiments of the present disclosure is as shown in the figure, Figure 3 and Figure 4As shown in the figure, the display panel includes a substrate 100, and a plurality of sub-pixels disposed on the substrate 100. The sub-pixels include a light-emitting device emitting white light and a color filter layer CF disposed on the side of the light-emitting device away from the substrate 100. The plurality of sub-pixels includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. Among them, the red sub-pixel R includes a first light-emitting device W1 emitting white light and a red filter CF-R disposed on the side of the first light-emitting device W1 away from the substrate 100; the green sub-pixel G includes a second light-emitting device W2 emitting white light and a green filter CF-G disposed on the side of the second light-emitting device W2 away from the substrate 100; and the blue sub-pixel B includes a third light-emitting device W3 emitting white light and a blue filter CF-B disposed on the side of the third light-emitting device W3 away from the substrate 100. The white light emitted by the first light-emitting device W1 is filtered by the red filter CF-R to emit red light. The white light emitted by the second light-emitting device W2 is filtered by the green filter CF-G to emit green light. The white light emitted by the third light-emitting device W3 is filtered by the blue filter CF-B to emit blue light.
[0055] The light-emitting device (such as the first light-emitting device W1, the second light-emitting device W2, and the third light-emitting device W3) includes a first electrode 1, a light-emitting unit 3, and a second electrode 2 disposed in sequence in the direction Z away from the substrate 100. A microcavity structure is formed between the first electrode 1 and the second electrode 2; the microcavity lengths of the microcavity structures of the first light-emitting device W1, the second light-emitting device W2, and the third light-emitting device W3 are different. Optionally, the light-emitting unit 3 of each light-emitting device can be uniformly vapor-deposited by an open mask (OM) vapor deposition process, so as to reduce the spacing between adjacent devices, thereby increasing the pixel density (PPI) and further increasing the screen ratio. Optionally, one of the first electrode 1 and the second electrode 2 is an anode, and the other is a cathode. The present disclosure takes the first electrode 1 as the anode and the second electrode 2 as the cathode as an example for description.
[0056] The second electrode 2 of the second light-emitting device W2 includes a first sub-electrode 21 and a second sub-electrode 22 stacked in the direction Z away from the substrate 100; one of the first sub-electrode 21 and the second sub-electrode 22 has a light transmittance greater than that of the other; the sub-electrode with high light transmittance is denoted as a first light transmittance film 201, and the sub-electrode with low light transmittance is denoted as a second light transmittance film 202. Optionally, as shown in the figure, Figure 3 The light transmittance of the first sub-electrode 21 is greater than that of the second sub-electrode 22, so the first sub-electrode 21 is the first light transmittance film 201, and the second sub-electrode 22 is the second light transmittance film 202. Optionally, as shown in the figure, Figure 4As shown, the light transmittance of the second sub-electrode 22 is greater than that of the first sub-electrode 21, and thus the second sub-electrode 22 is the first light-transmitting film 201 and the first sub-electrode 21 is the second light-transmitting film 202. Without considering light absorption, according to the characteristics of light transmittance and reflectance, the greater the light transmittance, the smaller the reflectance; the greater the reflectance, the smaller the light transmittance. Therefore, the light transmittance of the first light-transmitting film 201 is greater than that of the second light-transmitting film 202, and the reflectance of the second light-transmitting film 202 is greater than that of the first light-transmitting film 201. One of the second electrode 2 of the first light-emitting device W1 and the second electrode 2 of the third light-emitting device W3 is the third light-transmitting film 203, and the other at least includes the fourth light-transmitting film 204; the light transmittance of the third light-transmitting film 203 and the fourth light-transmitting film 204 is greater than that of the second light-transmitting film 202, and the reflectance of the third light-transmitting film 203 and the fourth light-transmitting film 204 is smaller than that of the second light-transmitting film 202.
[0057] In the embodiments of the present disclosure, the cathode of the green sub-pixel G adopts a double-layer stacked first microcavity structure, i.e., the first light-transmitting film 201 with high light transmittance and the second light-transmitting film 202 with certain reflectance, to improve the green light emission efficiency, thereby improving the brightness and reducing the power consumption; in addition, under the first microcavity structure, the white light second light-emitting device W2 can realize green light single-band light emission, thereby improving the color purity and reducing the color cast; at the same time, at least one of the cathode of the red sub-pixel R and the cathode of the blue sub-pixel B adopts a second microcavity structure, i.e., the third light-transmitting film 203 with high light transmittance and the fourth light-transmitting film 204 with high light transmittance, to improve the color cast.
[0058] In some embodiments, the first electrode 1 is a reflective electrode. Optionally, the first electrode 1 can be a single layer or a plurality of layers, and the material thereof can be selected from metal, metal compound and combination of metal and metal compound. For example, the material of the first electrode 1 can be selected from at least one of indium tin oxide (ITO), titanium nitride (TiN), lithium oxide (Li2O), calcium oxide (CaO), indium zinc oxide (IZO), lithium fluoride (LiF), magnesium fluoride (MgF2), silver (Ag), magnesium (Mg), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), Ca-LiF alloy, AI-LiF alloy, molybdenum (Mo), titanium (Ti), indium (In), tin (Sn) and zinc (Zn).
[0059] Optionally, the first electrode 1 is a plurality of layers, for example, a silver (Ag) layer and an indium tin oxide (ITO) layer arranged in sequence in the direction Z away from the substrate 100. Silver (Ag) has high reflectivity, and indium tin oxide (ITO) has high light transmittance, and the combination of the two improves the white light emission efficiency.
[0060] Optionally, the first electrode 1 is multi-layered, for example, a silver (Ag) layer, a silicon oxide (SiO) layer and an indium tin oxide (ITO) layer are sequentially arranged along the direction Z away from the substrate 100. Silver (Ag) has a higher reflectivity, and indium tin oxide (ITO) has a higher light transmittance, which can improve the white light out-coupling efficiency. The silicon oxide (SiO) layer serves as an optical adjustment layer, mainly for adjusting the microcavity length of the light emitting device.
[0061] In some embodiments, the second electrode 2 can be single-layered or multi-layered, and the material can be selected from metals, metal compounds and combinations of metals and metal compounds. For example, the material of the second electrode 2 can be selected from at least one of silver (Ag), magnesium (Mg), indium zinc oxide (IZO), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), Ca-LiF alloy, AI-LiF alloy, molybdenum (Mo), titanium (Ti), indium (In), tin (Sn) and zinc (Zn).
[0062] Optionally, the material of the first light-transmitting film 201 is indium zinc oxide (IZO), the material of the second light-transmitting film 202 is an alloy material of magnesium (Mg) and silver (Ag), or the material of the second light-transmitting film 202 is an alloy material of magnesium (Mg) and aluminum (Al).
[0063] Optionally, the material of the third light-transmitting film 203 is indium zinc oxide (IZO), and the material of the fourth light-transmitting film 204 is indium zinc oxide (IZO).
[0064] For example, the materials of the first light-transmitting film 201, the third light-transmitting film 203 and the fourth light-transmitting film 204 are all indium zinc oxide (IZO), and the light transmittance is greater than or equal to 79%. As shown in Table 1, the transmittance of indium zinc oxide (IZO) to different wavebands of light under different thicknesses is shown.
[0065] Table 1
[0066]
[0067] Optionally, the materials of the first light-transmitting film 201, the third light-transmitting film 203 and the fourth light-transmitting film 204 are all composite film layers, for example, three layers of MoO3 / [Ag:Al] / MoO3, or three layers of MoO3 / Ag / MoO3. Wherein, [Ag:Al] represents an alloy material of magnesium and aluminum. As shown in Table 2, the transmittance of the above two materials to different wavebands of light under different thicknesses is shown.
[0068] Table 2
[0069]
[0070] In each MoO3 / [Ag:Al] / MoO, the mass ratio of Ag:Al is 5:0.3.
[0071] In some embodiments, such as Figure 3 and Figure 4 As shown, the second electrode 2 of the first light-emitting device W1 and the second electrode 2 of the third light-emitting device W3 are both single-layered and adopt a second microcavity structure, exhibiting high transmittance. Specifically, the second electrode 2 of the first light-emitting device W1 is a third light-transmitting film 203, and the second electrode 2 of the third light-emitting device W3 is a fourth light-transmitting film 204. Optionally, the first light-transmitting film 201, the third light-transmitting film 203, and the fourth light-transmitting film 204 have the same transmittance; the first light-transmitting film 201, the third light-transmitting film 203, and the fourth light-transmitting film 204 are connected as an integral structure, thus allowing the first light-transmitting film 201, the third light-transmitting film 203, and the fourth light-transmitting film 204 to be formed using a single patterning process, improving fabrication efficiency.
[0072] In this embodiment, the cathode of the green sub-pixel G adopts a first microcavity structure with double-layer stacking, while the cathodes of the red sub-pixel R and the blue sub-pixel B both adopt a second microcavity structure. At this time, the first microcavity structure and the second microcavity structure in the display panel are combined. That is, the red sub-pixel R and the blue sub-pixel B with the second microcavity structure can be used to improve color deviation and improve the display effect, while the green sub-pixel G with the first microcavity structure can be used to improve brightness and reduce power consumption.
[0073] In some embodiments, Figure 5a This is a schematic diagram showing the relationship between the second light-transmitting film and the first electrodes of each light-emitting device in the display panel of Example 1 provided in this embodiment of the present disclosure. Figure 5b This is a schematic diagram of the relationship between the second light-transmitting film and the first electrodes of each light-emitting device in the display panel of Example 2 provided in the embodiments of this disclosure, as shown below. Figure 5a and Figure 5b As shown, the distance from the outline boundary of the orthographic projection of the second light-transmitting film 202 on the substrate 100 to the outline boundary of the orthographic projection of the first electrode 1 of the second light-emitting device W2 on the substrate 100 is the first distance H1; the distance from the outline boundary of the orthographic projection of the second light-transmitting film 202 on the substrate 100 to the outline boundary of the orthographic projection of the first electrode 1 of the first light-emitting device W1 on the substrate 100 is the second distance H2; the distance from the outline boundary of the orthographic projection of the second light-transmitting film 202 on the substrate 100 to the outline boundary of the orthographic projection of the first electrode 1 of the third light-emitting device W3 on the substrate 100 is the third distance H3; the first distance H1 is less than the second distance H2, and the first distance H1 is less than the third distance H3.
[0074] The first electrode 1 of different light emitting devices has an insulating barrier structure 10. When the first electrode 1 is a single-layer structure, the insulating barrier structure 10 directly isolates the first electrode 1 of each different light emitting device. When the first electrode 1 is a multi-layer structure, as shown in Figure 14 the insulating barrier structure 10 can isolate part of the intermediate layers in the first electrode 1, such as the third sub-layer 13, the fifth sub-layer 15, and the seventh sub-layer 17. At this time, the first distance H1 can be the distance from the contour boundary of the orthographic projection of the second light-transmitting film 202 on the substrate substrate 100 to the contour boundary of the orthographic projection of the second sub-layer 12 of the second light emitting device W2 on the substrate substrate 100; the second distance H2 can be the distance from the contour boundary of the orthographic projection of the second light-transmitting film 202 on the substrate substrate 100 to the contour boundary of the orthographic projection of the fifth sub-layer 15 of the first light emitting device W1 on the substrate substrate 100; and the third distance H3 can be the distance from the contour boundary of the orthographic projection of the second light-transmitting film 202 on the substrate substrate 100 to the contour boundary of the orthographic projection of the seventh sub-layer 17 of the third light emitting device W3 on the substrate substrate 100.
[0075] In the embodiment, the first distance H1 is less than the second distance H2, and the first distance H1 is less than the third distance H3, which means that the boundary of the second light-transmitting film 202 is closer to the anode edge of the green sub-pixel B, thereby avoiding the influence of the second light-transmitting film 202 on color deviation.
[0076] In some embodiments, Figure 6 a schematic diagram of the display panel of Example 3 provided by the embodiment of the present disclosure, Figure 7 a schematic diagram of the display panel of Example 4 provided by the embodiment of the present disclosure, as shown in Figure 6 and Figure 7 the second electrode 2 of the first light emitting device W1 is a single layer and adopts a second microcavity structure, and has a higher light transmittance; and the second electrode 2 of the third light emitting device W3 is a double layer and adopts a first microcavity structure, and has a certain transmittance and reflectivity. Specifically, the second electrode 2 of the first light emitting device W1 is a third light-transmitting film 203, and the second electrode 2 of the third light emitting device W3 includes a third sub-electrode 23 and a fourth sub-electrode 24 arranged in sequence in the direction Z away from the substrate substrate 100; one of the third sub-electrode 23 and the fourth sub-electrode 24 has a light transmittance greater than that of the other; the sub-electrode with high light transmittance among the third sub-electrode 23 and the fourth sub-electrode 24 is a fourth light-transmitting film 204, and the sub-electrode with low light transmittance is a fifth light-transmitting film 205. The light transmittance of the fourth light-transmitting film 204 is greater than that of the fifth light-transmitting film 205, and the reflectivity of the fifth light-transmitting film 205 is greater than that of the fourth light-transmitting film 204. Optionally, as shown in Figure 6 the light transmittance of the third sub-electrode 23 is greater than that of the fourth sub-electrode 24, then the third sub-electrode 23 is the fourth light-transmitting film 204, and the fourth sub-electrode 24 is the fifth light-transmitting film 205. Optionally, as shown inFigure 7 As shown, the light transmittance of the fourth sub-electrode 24 is greater than that of the third sub-electrode 23, and then the fourth sub-electrode 24 is the fourth light-transmitting film 204, and the third sub-electrode 23 is the fifth light-transmitting film 205.
[0077] Optionally, the light transmittance of the fifth light-transmitting film 205 is the same as that of the second light-transmitting film 202. Optionally, the reflectivity of the fifth light-transmitting film 205 is the same as that of the second light-transmitting film 202.
[0078] Optionally, the second light-transmitting film 202 and the fifth light-transmitting film 205 are connected as an integrated structure. In this way, the second light-transmitting film 202 and the fifth light-transmitting film 205 can be formed by a one-time patterning process, thereby improving the preparation efficiency.
[0079] In this embodiment, the red sub-pixel R and the blue sub-pixel B adopt microcavity structures with different intensities. The cathode of the red sub-pixel R adopts a single-layer second microcavity structure, and the cathode of the blue sub-pixel B adopts a double-layer stacked first microcavity structure, so that the microcavity lengths of the red sub-pixel R and the blue sub-pixel B are different in each period, thereby improving the color cast.
[0080] In some embodiments, Figure 8 a schematic diagram of the display panel of Example 5 provided by the embodiment of the present disclosure, Figure 9 a schematic diagram of the display panel of Example 6 provided by the embodiment of the present disclosure, as Figure 8 and Figure 9 As shown, the second electrode 2 of the first light-emitting device W1 is double-layered and adopts the first microcavity structure, and has a certain transmittance and reflectivity. The second electrode 2 of the third light-emitting device W3 is single-layered and adopts the second microcavity structure, and has a higher light transmittance. Specifically, the second electrode 2 of the third light-emitting device W3 is the third light-transmitting film 203, and the second electrode 2 of the first light-emitting device W1 includes the third sub-electrode 23 and the fourth sub-electrode 24 arranged in sequence in the direction Z away from the substrate 100; the light transmittance of one of the third sub-electrode 23 and the fourth sub-electrode 24 is greater than that of the other; the sub-electrode with high light transmittance among the third sub-electrode 23 and the fourth sub-electrode 24 is the fourth light-transmitting film 204, and the sub-electrode with low light transmittance is the fifth light-transmitting film 205. Optionally, as shown, Figure 8 the light transmittance of the third sub-electrode 23 is greater than that of the fourth sub-electrode 24, and then the third sub-electrode 23 is the fourth light-transmitting film 204, and the fourth sub-electrode 24 is the fifth light-transmitting film 205. Optionally, as shown, Figure 9 the light transmittance of the fourth sub-electrode 24 is greater than that of the third sub-electrode 23, and then the fourth sub-electrode 24 is the fourth light-transmitting film 204, and the third sub-electrode 23 is the fifth light-transmitting film 205.
[0081] Optionally, the transmittance of the fifth light-transmitting film 205 is the same as the transmittance of the second light-transmitting film 202. Optionally, the reflectivity of the fifth light-transmitting film 205 is the same as the reflectivity of the second light-transmitting film 202.
[0082] Optionally, the second light-transmitting film 202 and the fifth light-transmitting film 205 are connected as an integrated structure. In this way, the second light-transmitting film 202 and the fifth light-transmitting film 205 can be formed by a one-time patterning process, improving the preparation efficiency.
[0083] In this embodiment, the red sub-pixel R and the blue sub-pixel B adopt different intensity microcavity structures. The cathode of the red sub-pixel R adopts a double-layer stacked first microcavity structure, and the cathode of the blue sub-pixel B adopts a single-layer second microcavity structure, so that the microcavity lengths of the red sub-pixel R and the blue sub-pixel B are different in each period, thereby improving the color cast.
[0084] For example 1, the first light-transmitting film 201 is arranged on the side of the second light-transmitting film 202 close to the substrate 100. The preparation process of the second light-transmitting film 202 can adopt an etching process. The entire layer of magnesium and silver alloy material (i.e., MgAg alloy material) is deposited, and the pattern including the second light-transmitting film 202 is formed by etching. Alternatively, an inhibitor having an inhibiting effect on the formation of the MgAg alloy material can also be used to limit the MgAg alloy material in the light-emitting area of the green sub-pixel G to form the pattern having the second light-transmitting film 202.
[0085] In some embodiments, Figure 10 A schematic diagram of the display panel of example 7 provided by the embodiments of the present disclosure is shown. For example 1, further, Figure 10 As shown, the first sub-electrode 21 is the first light-transmitting film 201, and the second sub-electrode 22 is the second light-transmitting film 202. The display panel further includes an inhibitor layer 4 arranged on the side of the first light-transmitting film 201, the third light-transmitting film 203, and the fourth light-transmitting film 204 away from the substrate 100 and connected as an integrated structure. The inhibitor layer 4 has a first opening 41 arranged corresponding to the second light-emitting device W2. The first opening 41 exposes the first light-transmitting film 201. The second light-transmitting film 202 of the second light-emitting device W2 is limited within the first opening 41 and in contact with the first light-transmitting film 201. Optionally, the second light-transmitting film 202 of the second light-emitting device W2 is completely limited within the first opening 41.
[0086] The technical means of example 7 is the same as that of example 1, i.e., the first light-emitting device W1 and the third light-emitting device W3 both adopt the second microcavity structure, and the second light-emitting device W2 adopts the first microcavity structure. However, the difference between example 7 and example 1 is that the second light-transmitting film 202 of the second light-emitting device W2 is limited within the first opening 41.
[0087] Optionally, the material of the second light-transmitting film 202 is an alloy material with magnesium and silver, or the material of the second light-transmitting film 202 is an alloy material with magnesium and aluminum. The material of the inhibiting layer 4 has a characteristic of inhibiting the material of the second light-transmitting film 202 from forming a film. The orthographic projection of the inhibiting layer 4 on the substrate 100 covers the light-emitting regions of the first light-emitting device W1 and the third light-emitting device W3, and the first opening 41 exposes the light-emitting unit 3 of the second light-emitting device W2 located in the light-emitting region. The preparation process of the second light-transmitting film 202 can be, for example, first evaporating the inhibiting material, etching to form the inhibiting layer 4 with the first opening 41; then, evaporating the MgAg alloy material, and limiting the MgAg alloy material in the first opening 41 by means of the characteristic of the inhibiting layer 4 of inhibiting the MgAg alloy material from forming a film, so as to form the second light-transmitting film 202.
[0088] For example, the material of the inhibiting layer 4 can be selected from any one or a combination of the following: (a) 2-(4-tert-butylphenyl)-5-(4-biphenyl)-1,3,4-oxadiazole; (b) 2-(4-biphenyl)-5-phenyl-1,3,4-oxadiazole; (c) 1,3-bis(N-carbazolyl)benzene; (d) 3-(4-biphenyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole; (e) N,N'-diphenyl-N,N'-di(2-naphthyl)-(1,1'-biphenyl)-4,4'-diamine; (f) 4-(1-naphthyl)-3,5-diphenyl-4H-1,2,4-triazole; (g) 3,5-bis[4-(1,1-dimethylethyl)phenyl]-4-phenyl-4H-1,2,4-triazole; (h) 2,5-bis(1-naphthyl)-1,3,4-oxadiazole; (i) 2-tert-butyl-9,10-di(naphth-2-yl)anthracene; (j) 4,4'-bis(N-carbazolyl)-1,1'-biphenyl; (k) bis(2-methyl-8-quinolinato)-4-phenylphenolato aluminum; (l) 9-[1,1'-biphenyl]-3-yl-9H-carbazole; (m) tris[2-phenylphenylpyridine-C2,N] iridium(III).
[0089] In some embodiments, Figure 11 A schematic diagram of the display panel of Example 8 provided by the embodiments of the present disclosure, Figure 12 A schematic diagram of the display panel of Example 9 provided by the embodiments of the present disclosure, as Figure 11 or Figure 12As shown, the first sub-electrode 21 is a first light-transmitting film 201, the second sub-electrode 22 is a second light-transmitting film 202, the third sub-electrode 23 is a fourth light-transmitting film 204, and the fourth sub-electrode 24 is a fifth light-transmitting film 205; the display panel further comprises a suppression layer 4 disposed on the side of the first light-transmitting film 201, the third light-transmitting film 203, and the fourth light-transmitting film 204 away from the substrate 100 and connected as an integral structure; the suppression layer 4 has a first opening 41 and a second opening 42 penetrating along the thickness direction thereof, the first opening 41 exposes the first light-transmitting film 201, and the second opening 42 exposes the fourth light-transmitting film 204; the second light-transmitting film 202 is confined within the first opening 41 and in contact with the first light-transmitting film 201; and the fifth light-transmitting film 205 is confined within the second opening 42 and in contact with the fourth light-transmitting film 204. Optionally, the second light-transmitting film 202 is completely confined within the first opening 41. The fifth light-transmitting film 205 is completely confined within the second opening 42.
[0090] The technical means for solving the technical problems of Example 3 is the same as that of Example 5, that is, the first light-emitting device W1 adopts the first microcavity structure, and the third light-emitting device W3 adopts the second microcavity structure. However, Example 8 is different from Example 3 in that, as shown in Figure 11 The fifth light-transmitting film 205 of the third light-emitting device W3 is confined within the second opening 42. Optionally, the materials of the second light-transmitting film 202 and the fifth light-transmitting film 205 are both alloy materials containing magnesium and silver, or both are alloy materials containing magnesium and aluminum. The orthographic projection of the suppression layer 4 on the substrate 100 covers the light-emitting area of the first light-emitting device W1, the first opening 41 is opposite to the light-emitting unit 3 of the second light-emitting device W2 in the light-emitting area, and the second opening 42 is opposite to the light-emitting unit 3 of the third light-emitting device W3 in the light-emitting area. The second light-transmitting film 202 and the fifth light-transmitting film 205 are prepared by a one-time patterning process, for example, the suppression material can be evaporated first, and then etched to form the suppression layer 4 with the first opening 41 and the second opening 42; then, MgAg alloy material is evaporated, and the characteristics of the suppression layer 4 for suppressing the formation of MgAg alloy film are used to confine the MgAg alloy material within the first opening 41 and the second opening 42, thereby forming the second light-transmitting film 202 and the fifth light-transmitting film 205.
[0091] The technical means for solving the technical problems of Example 5 is the same as that of Example 3, that is, the first light-emitting device W1 adopts the first microcavity structure, and the third light-emitting device W3 adopts the second microcavity structure. However, Example 9 is different from Example 5 in that, as shown in Figure 12As shown, the fifth light-transmissive film 205 of the first light-emitting device W1 is completely defined within the second opening 42. The fifth light-transmissive film 205 of the first light-emitting device W1 is defined within the second opening 42. Optionally, the material of the second light-transmissive film 202 and the fifth light-transmissive film 205 is an alloy material with magnesium and silver, or the material of the second light-transmissive film 202 and the fifth light-transmissive film 205 is an alloy material with magnesium and aluminum. The orthographic projection of the inhibiting layer 4 on the substrate 100 covers the light-emitting region of the third light-emitting device W3, the first opening 41 is opposite the light-emitting unit 3 of the second light-emitting device W2 in the light-emitting region, and the second opening 42 is opposite the light-emitting unit 3 of the first light-emitting device W1 in the light-emitting region. The second light-transmissive film 202 and the fifth light-transmissive film 205 are prepared by a one-time patterning process, and the preparation process is the same as that of Example 8 described above.
[0092] Optionally, the inhibiting layer 4 is an insulating layer with high light transmittance. The light transmittance of the inhibiting layer 4 is greater than 80%.
[0093] For each of the above embodiments, whether the second light-transmissive film 202 or the fifth light-transmissive film 205, when the material is selected to be an alloy material of magnesium and silver, the relationship between the transmittance of different thicknesses and different wavebands of light is as follows: Figure 13 As shown.
[0094] It should be noted that when the second light-transmissive film 202 is selected to be an alloy material of magnesium and silver, the first light-transmissive film 201 can be selected to be an alloy material of magnesium and aluminum. Under the condition that other structure parameters remain unchanged, the light transmittance of the alloy material of magnesium and aluminum is greater than that of the alloy material of magnesium and silver. Similarly, when the fifth light-transmissive film 205 is selected to be an alloy material of magnesium and silver, the fourth light-transmissive film 204 can be selected to be an alloy material of magnesium and aluminum.
[0095] In some embodiments, as shown in Figures 3-12 The orthographic projection of the red color filter CF-R on the substrate 100 covers the orthographic projection of the first light-emitting device W1 on the substrate 100; the orthographic projection of the green color filter CF-G on the substrate 100 covers the orthographic projection of the second light-emitting device W2 on the substrate 100; and the orthographic projection of the blue color filter CF-B on the substrate 100 covers the orthographic projection of the third light-emitting device W3 on the substrate 100.
[0096] Optionally, the adjacent color filters are in direct contact without a black matrix, so as to improve the PPI.
[0097] In some embodiments, Figure 14 The structural diagram of the anode of different sub-pixels provided by the embodiments of the present disclosure is as shown in Figure 14As shown, the first electrode 1 of the second light emitting device W2 includes a first sub-layer 11, a second sub-layer 12 and a third sub-layer 13 arranged in sequence in the direction Z away from the substrate substrate 100, the third sub-layer 13 is electrically connected with the first sub-layer 11; the first electrode 1 of the first light emitting device W1 includes a fourth sub-layer 14 and a fifth sub-layer 15 arranged in sequence in the direction Z away from the substrate substrate 100; the first electrode 1 of the third light emitting device W3 includes a sixth sub-layer 16 and a seventh sub-layer 17 arranged in sequence in the direction Z away from the substrate substrate 100; the materials of the first sub-layer 11, the fourth sub-layer 14 and the sixth sub-layer 16 are all metal, the materials of the third sub-layer 13, the fifth sub-layer 15 and the seventh sub-layer 17 are all transparent metal oxide, and the material of the second sub-layer 12 is transparent insulating material.
[0098] In some embodiments, as shown, Figure 14 the materials of the first sub-layer 11, the fourth sub-layer 14 and the sixth sub-layer 16 are all the same; the materials of the third sub-layer 13, the fifth sub-layer 15 and the seventh sub-layer 17 are all the same.
[0099] Optionally, for the second light emitting device W2, the material of the first sub-layer 11 can be selected from any one of silver (Ag), magnesium (Mg), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au); the material of the second sub-layer 12 can be selected from indium tin oxide (ITO) or silicon oxide (SiO); the material of the third sub-layer 13 can be selected from titanium nitride (TiN) or indium tin oxide (ITO). Silver (Ag) has high reflectivity, and indium tin oxide (ITO) has high light transmittance, which can improve the white light out efficiency. The silicon oxide (SiO) layer can be used as an optical adjustment layer to adjust the microcavity length of the second light emitting device W2.
[0100] Optionally, for the first light emitting device W1, the material of the third sub-layer 13 can be selected from any one of silver (Ag), magnesium (Mg), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au); the material of the fourth sub-layer 14 can be selected from titanium nitride (TiN) or indium tin oxide (ITO). Silver (Ag) has high reflectivity, and indium tin oxide (ITO) has high light transmittance, which can improve the white light out efficiency.
[0101] Optionally, for the third light emitting device W3, the material of the fifth sub-layer 15 can be selected from any one of silver (Ag), magnesium (Mg), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au); the material of the sixth sub-layer 16 can be selected from titanium nitride (TiN) or indium tin oxide (ITO). Silver (Ag) has high reflectivity, and indium tin oxide (ITO) has high light transmittance, which can improve the white light out efficiency.
[0102] In some embodiments, as shown,Figure 14 As shown, the first sub-layer 11, the fourth sub-layer 14 and the sixth sub-layer 16 are connected as an integrally formed structure, and the material thereof is selected from silver (Ag), which is beneficial to improve the light reflectivity.
[0103] It should be noted that the third sub-layer 13, the fifth sub-layer 15 and the seventh sub-layer 17 are spaced from each other, and can be isolated by the insulating barrier structure 10.
[0104] In some embodiments, Figure 15 The film layer diagram of the light-emitting unit provided by the embodiments of the present disclosure is as shown in Figure 15 As shown, the light-emitting unit 3 includes, in sequence along the direction Z away from the substrate substrate 100, a hole injection layer HIL, a first hole transport layer HTL1, a red light-emitting layer R-EML, a green light-emitting layer G-EML, a charge separation generation layer CGL, a second hole transport layer HTL2, a blue light-emitting layer B-EML, an electron transport layer ETL and an electron injection layer EIL. The anode (first electrode 1) generates holes, which are transmitted to the red light-emitting layer R-EML and the green light-emitting layer G-EML through the hole injection layer HIL and the first hole transport layer HTL1, and the charge separation generation layer CGL generates electrons, which are transmitted to the red light-emitting layer R-EML and the green light-emitting layer G-EML, and the holes and the electrons in the red light-emitting layer R-EML and the green light-emitting layer G-EML recombine to emit yellow light. At the same time, the charge separation generation layer CGL generates holes, which are transmitted to the blue light-emitting layer B-EML through the hole transport layer HTL, and the cathode (second electrode 2) generates electrons, which are transmitted to the blue light-emitting layer B-EML through the electron injection layer EIL and the electron transport layer ETL, and the holes and the electrons in the blue light-emitting layer B-EML recombine to emit blue light. The blue light and the yellow light are mixed to form white light, and the white light is emitted through the color filter to form light of a specific color, such as red light, green light and blue light.
[0105] In some embodiments, as shown in Figures 3-12 As shown, the display panel further includes an encapsulation layer 4 arranged on the side of the light-emitting device close to the color film layer CF. The encapsulation layer 4 can be a single-layer structure or a multi-layer structure. When the encapsulation layer 4 is a multi-layer structure, the encapsulation layer 4 can include, in sequence, a first inorganic encapsulation layer (not shown in the figure), an organic encapsulation layer (not shown in the figure) and a second inorganic encapsulation layer (not shown in the figure), for example, silicon nitride SiN + ink + silicon nitride SiN.
[0106] In some embodiments, as shown in Figures 3-12 As shown, the display panel further includes a driving layer 200 arranged on the side of the first electrode 1 close to the substrate substrate 100. The driving layer 200 includes a pixel driving circuit for driving the light-emitting device (OLED), and the pixel driving circuit at least includes a driving transistor, a data writing transistor and a storage capacitor, for example, the pixel driving circuit can be but is not limited to a 7T1C (7 transistors and 1 capacitor) circuit structure.
[0107] In addition, the display device can be any product having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a vehicle-mounted device, and the like. Other essential components of the display device are understood by those skilled in the art and are not described here in detail, nor should they be considered as limiting the present disclosure.
[0108] It can be understood that the above embodiments are only exemplary embodiments adopted for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also considered as the protection scope of the present disclosure.
Claims
1. A display panel, characterized in that, The device includes a substrate, a red sub-pixel, a green sub-pixel, and a blue sub-pixel disposed on the substrate. The red sub-pixel includes a first light-emitting device that emits white light and a red filter disposed on the side of the first light-emitting device facing away from the substrate. The green sub-pixel includes a second light-emitting device that emits white light and a green filter disposed on the side of the second light-emitting device facing away from the substrate. The blue sub-pixel includes a third light-emitting device that emits white light and a blue filter disposed on the side of the third light-emitting device facing away from the substrate. The first light-emitting device, the second light-emitting device, and the third light-emitting device each include a first electrode, a light-emitting unit, and a second electrode arranged sequentially along a direction away from the substrate. The second electrode of the second light-emitting device includes a first sub-electrode and a second sub-electrode stacked together in a direction away from the substrate; one of the first sub-electrode and the second sub-electrode has a higher transmittance than the other; the sub-electrode with higher transmittance is referred to as the first light-transmitting film, and the sub-electrode with lower transmittance is referred to as the second light-transmitting film. One of the second electrode of the first light-emitting device and the second electrode of the third light-emitting device is a third light-transmitting film, and the other includes at least a fourth light-transmitting film; The light transmittance of both the third and fourth light-transmitting films is greater than that of the second light-transmitting film.
2. The display panel according to claim 1, characterized in that, The second electrode of the first light-emitting device is the third light-transmitting film, and the second electrode of the third light-emitting device is the fourth light-transmitting film; The first, third, and fourth light-transmitting films have the same light transmittance; the first, third, and fourth light-transmitting films are connected as a single structure.
3. The display panel according to claim 2, characterized in that, The distance from the outline boundary of the orthographic projection of the second light-transmitting film on the substrate to the outline boundary of the orthographic projection of the first electrode of the second light-emitting device on the substrate is a first distance; the distance from the outline boundary of the orthographic projection of the second light-transmitting film on the substrate to the outline boundary of the orthographic projection of the first electrode of the first light-emitting device on the substrate is a second distance; the distance from the outline boundary of the orthographic projection of the second light-transmitting film on the substrate to the outline boundary of the orthographic projection of the first electrode of the third light-emitting device on the substrate is a third distance. The first distance is less than the second distance, and the first distance is less than the third distance.
4. The display panel according to claim 1, characterized in that, The second electrode of the first light-emitting device is the third light-transmitting film, and the second electrode of the third light-emitting device includes a third sub-electrode and a fourth sub-electrode arranged sequentially along the direction away from the substrate. The transmittance of one of the third sub-electrode and the fourth sub-electrode is greater than that of the other; the sub-electrode with higher transmittance is the fourth light-transmitting film, and the sub-electrode with lower transmittance is referred to as the fifth light-transmitting film.
5. The display panel according to claim 1, characterized in that, The second electrode of the third light-emitting device is the third light-transmitting film, and the second electrode of the first light-emitting device includes a third sub-electrode and a fourth sub-electrode arranged sequentially along the direction away from the substrate. The transmittance of one of the third sub-electrode and the fourth sub-electrode is greater than that of the other; the sub-electrode with higher transmittance is the fourth light-transmitting film, and the sub-electrode with lower transmittance is referred to as the fifth light-transmitting film.
6. The display panel according to claim 4 or 5, characterized in that, The reflectivity of the fifth transparent film is the same as that of the second transparent film.
7. The display panel according to claim 4 or 5, characterized in that, The second light-transmitting film and the fifth light-transmitting film are connected as a single structure.
8. The display panel according to claim 4 or 5, characterized in that, The first sub-electrode is the first light-transmitting film, the second sub-electrode is the second light-transmitting film, the third sub-electrode is the fourth light-transmitting film, and the fourth sub-electrode is the fifth light-transmitting film; The display panel further includes an inhibition layer disposed on the side of the first light-transmitting film, the third light-transmitting film and the fourth light-transmitting film that are connected as an integral structure, facing away from the substrate. The inhibition layer has a first opening and a second opening extending through its thickness direction; the second light-transmitting film is confined within the first opening, and the fifth light-transmitting film is confined within the second opening.
9. The display panel according to claim 8, characterized in that, The materials of the second and fifth light-transmitting films are both alloys of magnesium and silver, or the materials of the second and fifth light-transmitting films are both alloys of magnesium and aluminum.
10. The display panel according to any one of claims 1 to 5, characterized in that, The first sub-electrode is the first light-transmitting film, and the second sub-electrode is the second light-transmitting film; The display panel further includes an inhibition layer disposed on the side of the first light-transmitting film, the third light-transmitting film and the fourth light-transmitting film that are connected as an integral structure, facing away from the substrate. The inhibition layer has a first opening extending through its thickness direction, and the second light-transmitting film is confined within the first opening.
11. The display panel according to claim 10, characterized in that, The material of the second light-transmitting film is an alloy material containing magnesium and silver, or the material of the second light-transmitting film is an alloy material containing magnesium and aluminum.
12. The display panel according to any one of claims 1 to 5, characterized in that, The light transmittance of the first, third, and fourth light-transmitting films is greater than or equal to 79%.
13. The display panel according to any one of claims 1 to 5, characterized in that, The first electrode of the second light-emitting device includes a first sub-layer, a second sub-layer, and a third sub-layer arranged sequentially in a direction away from the substrate, wherein the third sub-layer is electrically connected to the first sub-layer; the first electrode of the first light-emitting device includes a fourth sub-layer and a fifth sub-layer arranged sequentially in a direction away from the substrate; the first electrode of the third light-emitting device includes a sixth sub-layer and a seventh sub-layer arranged sequentially in a direction away from the substrate. The first sublayer, the fourth sublayer, and the sixth sublayer are all made of metal, the third sublayer, the fifth sublayer, and the seventh sublayer are all made of transparent metal oxide, and the second sublayer is made of transparent insulating material.
14. The display panel according to claim 13, characterized in that, The first sublayer, the fourth sublayer, and the sixth sublayer are all made of the same material; the third sublayer, the fifth sublayer, and the seventh sublayer are all made of the same material.
15. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 14.