Display panel and display apparatus
By setting electrodes and filters with different transmittances in the white OLED display panel, 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
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- BOE TECHNOLOGY GROUP CO LTD
- Filing Date
- 2026-01-04
- Publication Date
- 2026-07-16
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.
The color shift of the red and blue sub-pixels was improved, and the brightness of the green sub-pixels was increased, achieving a display effect with high brightness and low power consumption.
Smart Images
Figure CN2026070041_16072026_PF_FP_ABST
Abstract
Description
Display panel and display device Technical Field
[0001] This disclosure belongs to the field of display technology, specifically relating to a display panel and a display device. Background Technology
[0002] Organic light-emitting diodes (OLEDs), as the next generation of display technology, offer superior display performance. White OLED devices (WOLEDs) combined with color filters create display panels with a high screen-to-body ratio. However, despite the color filter's filtering function, color shift issues still exist due to structural limitations. Summary of the Invention
[0003] This disclosure aims to at least solve one of the technical problems existing in the prior art, and to provide a display panel and a display device.
[0004] In a first aspect, the technical solution adopted to solve the technical problem of this disclosure is a display panel, including a substrate, a red sub-pixel, a green sub-pixel and a blue sub-pixel disposed on the substrate, wherein 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, and 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;
[0005] 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.
[0006] 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.
[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-transmitting film, and the other includes at least a fourth light-transmitting film;
[0008] The light transmittance of both the third and fourth light-transmitting films is greater than that of the second light-transmitting film.
[0009] In some embodiments, 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;
[0010] 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.
[0011] In some embodiments, 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; and 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.
[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-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.
[0014] 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.
[0015] In some embodiments, 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.
[0016] 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.
[0017] In some embodiments, the reflectivity of the fifth light-transmitting film is the same as that of the second light-transmitting film.
[0018] In some embodiments, the second light-transmitting film and the fifth light-transmitting film are connected as an integral structure.
[0019] In some embodiments, 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;
[0020] 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.
[0021] 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.
[0022] In some embodiments, 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.
[0023] In some embodiments, the first sub-electrode is the first light-transmitting film, and the second sub-electrode is the second light-transmitting film;
[0024] 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.
[0025] The inhibition layer has a first opening extending through its thickness direction, and the second light-transmitting film is confined within the first opening.
[0026] In some embodiments, 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.
[0027] In some embodiments, the light transmittance of the first light-transmitting film, the third light-transmitting film, and the fourth light-transmitting film is all greater than or equal to 79%.
[0028] In some embodiments, the first electrode of the second light-emitting device includes a first sub-layer, a second sub-layer, and a third sub-layer sequentially disposed along 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 sequentially disposed along 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 sequentially disposed along a direction away from the substrate.
[0029] 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.
[0030] In some embodiments, 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.
[0031] Secondly, embodiments of this disclosure also provide a display device, including a display panel as described in any one of the first aspects. Attached Figure Description
[0032] Figure 1 shows the light emission spectrum of the display panel under the first microcavity structure.
[0033] Figure 2 shows the light emission spectrum of the display panel under the second microcavity structure.
[0034] Figure 3 is a schematic diagram of the display panel in Example 1 provided in the embodiments of this disclosure.
[0035] Figure 4 is a schematic diagram of the display panel in Example 2 provided in the embodiments of this disclosure.
[0036] Figure 5a is a schematic diagram of the relationship between the second light-transmitting film and the first electrode of each light-emitting device in the display panel of Example 1 provided in the embodiments of this disclosure.
[0037] Figure 5b is a schematic diagram of the relationship between the second light-transmitting film and the first electrode of each light-emitting device in the display panel of Example 2 provided in the embodiments of this disclosure.
[0038] Figure 6 is a schematic diagram of the display panel of Example 3 provided in the embodiments of this disclosure.
[0039] Figure 7 is a schematic diagram of the display panel of Example 4 provided in the embodiments of this disclosure.
[0040] Figure 8 is a schematic diagram of the display panel of Example 5 provided in the embodiments of this disclosure.
[0041] Figure 9 is a schematic diagram of the display panel of Example 6 provided in the embodiments of this disclosure.
[0042] Figure 10 is a schematic diagram of the display panel of Example 7 provided in the embodiments of this disclosure.
[0043] Figure 11 is a schematic diagram of the display panel of Example 8 provided in the embodiments of this disclosure.
[0044] Figure 12 is a schematic diagram of the display panel of Example 9 provided in the embodiments of this disclosure.
[0045] Figure 13 is a graph showing the relationship between transmittance and thickness of the magnesium and silver alloy material provided in the embodiments of this disclosure.
[0046] Figure 14 is a structural diagram of the anode of different sub-pixels provided in the embodiments of this disclosure.
[0047] Figure 15 is a film layer diagram of the light-emitting unit provided in the embodiment of this disclosure. Detailed Implementation
[0048] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. The components of the embodiments of this disclosure described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely represents selected embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.
[0049] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including,” “comprising,” or “containing,” and similar terms mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.
[0050] In this disclosure, "multiple or several" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0051] To increase the screen-to-body ratio of OLED display panels, white OLED devices can be used, with color filters applied to them. These color filters filter light, creating different colored light-emitting areas to replace the original light-emitting devices of different colors. 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 white OLED devices use a uniform open mask (OM) evaporation process to deposit light-emitting units across the entire surface, the spacing between adjacent devices can be reduced, thereby increasing the pixel density (PPI) and ultimately improving the screen-to-body ratio.
[0052] In related technologies, the display panel includes red, green, and blue sub-pixels. The red sub-pixel includes a white OLED device and a red light filter disposed on the side of the white OLED device facing away from the substrate; the green sub-pixel includes a white OLED device and a green light filter disposed on the side of the white OLED device facing away from the substrate; the blue sub-pixel includes a white OLED device and a blue light filter disposed on the side of the white OLED device facing away from the substrate. The microcavity lengths corresponding to the red, green, and blue bands satisfy L = m × 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 bands are different, to ensure that the red, green, and blue light emitted by the red, green, and blue sub-pixels are emitted simultaneously, the microcavity effect of the white OLED device needs to be minimized. However, while minimizing the microcavity effect in white OLED display panels, it also limits the high brightness and low power consumption of related products. In one scenario, the red, green, and blue sub-pixels all employ a first microcavity structure. This first microcavity structure is positioned on the light-emitting unit and can alter the resonant microcavity of the sub-pixel, thereby improving its light extraction efficiency. This results in increased product brightness and reduced power consumption. The principle behind the enhanced light extraction efficiency of the first microcavity structure lies in its composite structure: a high-transmittance film layer and a reflective film layer are superimposed. This allows for partial transmission and reflection of white light emitted by the white OLED device. The reflected white light is then reflected back to the composite film layer after passing through the bottom film layer (e.g., a reflective anode), and this process repeats, improving the forward light extraction efficiency of the sub-pixel. Figure 1 shows the light extraction spectrum of the display panel with the first microcavity structure. As shown in Figure 1, the horizontal axis represents wavelength (unit: nanometers, nm), and the vertical axis represents light intensity, with viewing angles of 0°, 30°, and 60° as examples. Since the cavity length of the second period of the red sub-pixel is similar to that of the third period of the blue sub-pixel, both the red and blue sub-pixels employ the first microcavity structure. Compared to the second microcavity structure, the forward efficiency of both red and blue light is improved, but the viewing angle color bias is worse. For example, despite the color filter, blue light still emits red light around 620nm. In another case, the red, green, and blue sub-pixels all employ the second microcavity structure. The second microcavity structure is a film layer structure with high light transmittance. Figure 2 shows the light emission spectrum of the display panel with the second microcavity structure. As shown in Figure 2, the horizontal axis represents wavelength (unit: nanometers, nm), and the vertical axis represents light emission intensity, with viewing angles of 0°, 30°, and 60° as examples. The forward light emission efficiency of the white OLED device using the second microcavity structure is weaker than that of the white OLED device using the first microcavity structure, but the viewing angle color bias of the white OLED device using the second microcavity structure is better.The red and blue sub-pixels use a second microcavity structure, and the wavelengths corresponding to the peak points under the three viewing angles are approximately the same. Therefore, the red and blue sub-pixels using the second microcavity structure have no color shift or only a small color shift, which does not affect the display effect.
[0053] In view of this, the present disclosure provides a display panel that essentially improves the color shift of the red and blue sub-pixels by reducing the light intensity of at least one of the red and blue sub-pixels, while enhancing the light intensity of the green sub-pixels, thereby ensuring high brightness and low power consumption.
[0054] Figure 3 is a schematic diagram of the display panel according to Example 1 of the present disclosure, and Figure 4 is a schematic diagram of the display panel according to Example 2 of the present disclosure. As shown in Figures 3 and 4, the display panel includes a substrate 100 and a plurality of sub-pixels disposed on the substrate 100. Each sub-pixel includes a white-light-emitting device and a color filter layer CF disposed on the side of the light-emitting device facing 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. Specifically, the red sub-pixel R includes a first white-light-emitting device W1 and a red filter CF-R disposed on the side of the first light-emitting device W1 facing away from the substrate 100; the green sub-pixel G includes a second white-light-emitting device W2 and a green filter CF-G disposed on the side of the second light-emitting device W2 facing away from the substrate 100; and the blue sub-pixel B includes a third white-light-emitting device W3 and a blue filter CF-B disposed on the side of the third light-emitting device W3 facing away from the substrate 100. The white light emitted by the first light-emitting device W1 is filtered by the red filter CF-R and then emitted as red light. The white light emitted by the second light-emitting device W2 is filtered by the green filter CF-G and then emitted as green light. The white light emitted by the third light-emitting device W3 is filtered by the blue filter CF-B and then emitted as blue light.
[0055] The light-emitting devices (such as the first light-emitting device W1, the second light-emitting device W2, and the third light-emitting device W3) include a first electrode 1, a light-emitting unit 3, and a second electrode 2 arranged sequentially along the Z direction 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 deposited using a uniform open mask (OM) evaporation process, thus reducing the spacing between adjacent devices, thereby increasing the pixel density (PPI) and improving the screen-to-body ratio. Optionally, one of the first electrode 1 and the second electrode 2 is an anode, and the other is a cathode. This disclosure uses the example of the first electrode 1 being the anode and the second electrode 2 being the cathode for illustration.
[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 a Z-direction away from the substrate 100; one of the first sub-electrode 21 and the second sub-electrode 22 has a higher transmittance than the other; the sub-electrode with higher transmittance is designated as the first light-transmitting film 201, and the sub-electrode with lower transmittance is designated as the second light-transmitting film 202. Optionally, as shown in FIG3, if the transmittance of the first sub-electrode 21 is greater than that of the second sub-electrode 22, then 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. Optionally, as shown in FIG4, if the transmittance of the second sub-electrode 22 is greater than that of the first sub-electrode 21, then 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, based on the characteristics of transmittance and reflectance, it is known that the higher the transmittance, the lower the reflectance; conversely, the higher the reflectance, the lower the transmittance. Therefore, the transmittance of the first transparent film 201 is greater than that of the second transparent film 202, and the reflectance of the second transparent film 202 is greater than that of the first transparent 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 transparent film 203, and the other includes at least a fourth transparent film 204. The transmittance of both the third transparent film 203 and the fourth transparent film 204 is greater than that of the second transparent film 202, and simultaneously, the reflectance of both the third transparent film 203 and the fourth transparent film 204 is less than that of the second transparent film 202.
[0057] In this embodiment, the cathode of the green sub-pixel G adopts a double-layer stacked first microcavity structure, namely a first light-transmitting film 201 with high light transmittance and a second light-transmitting film 202 with a certain reflectivity, which improves the green light emission efficiency, thereby increasing brightness and reducing power consumption. In addition, under the first microcavity structure, the white light-emitting second light-emitting device W2 can realize single-band green light emission, thereby improving color purity and reducing color deviation. At the same time, at least one of the cathodes of the red sub-pixel R and the blue sub-pixel B adopts a second microcavity structure, namely a third light-transmitting film 203 with high light transmittance and a fourth light-transmitting film 204 with high light transmittance, which improves color deviation.
[0058] In some embodiments, the first electrode 1 is a reflective electrode. Optionally, the first electrode 1 can be a single layer or multiple layers, and its material can be selected from metals, metal compounds, and combinations of metals and metal compounds. 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, Al-LiF alloy, molybdenum (Mo), titanium (Ti), indium (In), tin (Sn), and zinc (Zn).
[0059] Optionally, the first electrode 1 is multilayered, for example, a silver (Ag) layer and an indium tin oxide (ITO) layer are sequentially disposed along the Z direction away from the substrate 100. Silver (Ag) has high reflectivity, and indium tin oxide (ITO) has high transmittance; the combination of the two improves the white light emission efficiency.
[0060] Optionally, the first electrode 1 is multilayered, for example, consisting of a silver (Ag) layer, a silicon oxide (SiO) layer, and an indium tin oxide (ITO) layer sequentially disposed along the Z direction away from the substrate 100. Silver (Ag) has high reflectivity, and indium tin oxide (ITO) has high transmittance, which can improve the white light emission efficiency. The silicon oxide (SiO) layer serves as an optical adjustment layer, mainly used to adjust the microcavity length of the light-emitting device.
[0061] In some embodiments, the second electrode 2 may be a single layer or multiple layers, and the material may be selected from metals, metal compounds, and combinations of metals and metal compounds. For example, the material of the second electrode 2 may 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, Al-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), and the material of the second light-transmitting film 202 is an alloy of magnesium (Mg) and silver (Ag), or the material of the second light-transmitting film 202 is an alloy of magnesium (Mg) and aluminum (Al).
[0063] Optionally, the material of the third transparent film 203 is indium zinc oxide (IZO), and the material of the fourth transparent film 204 is indium zinc oxide (IZO).
[0064] For example, the materials of the first transparent film 201, the third transparent film 203, and the fourth transparent film 204 are all indium zinc oxide (IZO), with a light transmittance greater than or equal to 79%. As shown in Table 1, it is the transmittance of indium zinc oxide (IZO) for different wavelengths of light at different thicknesses.
[0065] Table 1
[0066] 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, such as three layers of MoO3 / [Ag:Al] / MoO3, or three layers of MoO3 / Ag / MoO3. Here, [Ag:Al] represents an alloy of magnesium and aluminum. As shown in Table 2, these represent the transmittance of the two materials at different thicknesses for different wavelengths of light.
[0067] Table 2
[0068] In each MoO3 / [Ag:Al] / MoO, the mass ratio of Ag:Al is 5:0.3.
[0069] In some embodiments, as shown in Figures 3 and 4, 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 employ 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 manufacturing efficiency.
[0070] 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.
[0071] In some embodiments, FIG5a 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 1 provided in the embodiments of the present disclosure, and FIG5b 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 the present disclosure. As shown in FIG5a and FIG5b, 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 a 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 a 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 a 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.
[0072] An insulating barrier structure 10 is provided between the first electrodes 1 of different light-emitting devices. When the first electrode 1 is a single-layer structure, the insulating barrier structure 10 directly isolates the first electrodes 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 some 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 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 second sub-layer 12 of the second light-emitting device W2 on the substrate 100; the second distance H2 can be 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 fifth sub-layer 15 of the first light-emitting device W1 on the substrate 100; the third distance H3 can be 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 seventh sub-layer 17 of the third light-emitting device W3 on the substrate 100.
[0073] In this embodiment, the first distance H1 is less than the second distance H2 and 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 shift.
[0074] In some embodiments, FIG6 is a schematic diagram of the display panel of Example 3 provided in the present disclosure, and FIG7 is a schematic diagram of the display panel of Example 4 provided in the present disclosure. As shown in FIG6 and FIG7, the second electrode 2 of the first light-emitting device W1 is a single layer and adopts a second microcavity structure, which has high transmittance; the second electrode 2 of the third light-emitting device W3 is a double layer and adopts a first microcavity structure, which has a certain transmittance and reflectance. 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 sequentially along the Z direction away from the substrate 100; the 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 transmittance of the third sub-electrode 23 and the fourth sub-electrode 24 is the fourth light-transmitting film 204, and the sub-electrode with low transmittance is referred to as the fifth light-transmitting film 205. The transmittance of the fourth light-transmitting film 204 is greater than that of the fifth light-transmitting film 205, and the reflectance of the fifth light-transmitting film 205 is greater than that of the fourth light-transmitting film 204. Optionally, as shown in Figure 6, if the transmittance of the third sub-electrode 23 is greater than that of the fourth sub-electrode 24, then the third sub-electrode 23 serves as the fourth light-transmitting film 204, and the fourth sub-electrode 24 serves as the fifth light-transmitting film 205. Optionally, as shown in Figure 7, if the transmittance of the fourth sub-electrode 24 is greater than that of the third sub-electrode 23, then the fourth sub-electrode 24 serves as the fourth light-transmitting film 204, and the third sub-electrode 23 serves as the fifth light-transmitting film 205.
[0075] Optionally, the transmittance of the fifth light-transmitting film 205 is the same as that of the second light-transmitting film 202. Optionally, the reflectance of the fifth light-transmitting film 205 is the same as that of the second light-transmitting film 202.
[0076] Optionally, the second transparent film 202 and the fifth transparent film 205 are connected as a single structure. In this way, the second transparent film 202 and the fifth transparent film 205 can be formed in a single patterning process, improving the manufacturing efficiency.
[0077] In this embodiment, the red sub-pixel R and the blue sub-pixel B adopt microcavity structures of 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 cycle, thereby improving color shift.
[0078] In some embodiments, FIG8 is a schematic diagram of the display panel of Example 5 provided in the present disclosure, and FIG9 is a schematic diagram of the display panel of Example 6 provided in the present disclosure. As shown in FIG8 and FIG9, the second electrode 2 of the first light-emitting device W1 is double-layered and adopts a first microcavity structure, having a certain transmittance and reflectance. The second electrode 2 of the third light-emitting device W3 is single-layered and adopts a second microcavity structure, having higher transmittance. Specifically, the second electrode 2 of the third light-emitting device W3 is a third light-transmitting film 203, and the second electrode 2 of the first light-emitting device W1 includes a third sub-electrode 23 and a fourth sub-electrode 24 arranged sequentially along the Z direction away from the substrate 100; the 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 transmittance of the third sub-electrode 23 and the fourth sub-electrode 24 is the fourth light-transmitting film 204, and the sub-electrode with low transmittance is referred to as the fifth light-transmitting film 205. Optionally, as shown in Figure 8, if the transmittance of the third sub-electrode 23 is greater than that of the fourth sub-electrode 24, then the third sub-electrode 23 serves as the fourth transparent film 204, and the fourth sub-electrode 24 serves as the fifth transparent film 205. Alternatively, as shown in Figure 9, if the transmittance of the fourth sub-electrode 24 is greater than that of the third sub-electrode 23, then the fourth sub-electrode 24 serves as the fourth transparent film 204, and the third sub-electrode 23 serves as the fifth transparent film 205.
[0079] Optionally, the transmittance of the fifth light-transmitting film 205 is the same as that of the second light-transmitting film 202. Optionally, the reflectance of the fifth light-transmitting film 205 is the same as that of the second light-transmitting film 202.
[0080] Optionally, the second transparent film 202 and the fifth transparent film 205 are connected as a single structure. In this way, the second transparent film 202 and the fifth transparent film 205 can be formed in a single patterning process, improving the manufacturing efficiency.
[0081] In this embodiment, the red sub-pixel R and the blue sub-pixel B employ microcavity structures of different intensities. The cathode of the red sub-pixel R adopts a first microcavity structure with double-layer stacking, while the cathode of the blue sub-pixel B adopts a second microcavity structure with a single layer. This makes the microcavity lengths of the red sub-pixel R and the blue sub-pixel B different in each cycle, thereby improving color shift.
[0082] For Example 1, the first light-transmitting film 201 is disposed on the side of the second light-transmitting film 202 near the substrate 100. The second light-transmitting film 202 can be prepared by an etching process, in which an alloy material of magnesium and silver (i.e., MgAg alloy material) is deposited in a whole layer by evaporation, and the pattern including the second light-transmitting film 202 is formed by etching. Alternatively, an inhibitor that suppresses the film-forming effect of the MgAg alloy material can be used to confine the MgAg alloy material to the light-emitting area where the green sub-pixel G is located, so as to form a pattern with the second light-transmitting film 202.
[0083] In some embodiments, FIG10 is a schematic diagram of a display panel of Example 7 provided in the present disclosure. For Example 1, further as shown in FIG10, the first sub-electrode 21 is a first light-transmitting film 201, and the second sub-electrode 22 is a second light-transmitting film 202; the display panel further includes 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, which are connected as an integral structure, facing away from the substrate 100; the suppression layer 4 has a first opening 41 corresponding to the second light-emitting device W2, the first opening 41 exposing the first light-transmitting film 201; the second light-transmitting film 202 of the second light-emitting device W2 is confined 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 confined within the first opening 41.
[0084] The technical means to solve the technical problem is the same as that in Example 1, both the first light-emitting device W1 and the third light-emitting device W3 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 confined within the first opening 41.
[0085] Optionally, the material of the second transparent film 202 is an alloy material containing magnesium and silver, or an alloy material containing magnesium and aluminum. The material of the suppression layer 4 has the property of suppressing the film formation of the material of the second transparent film 202. The orthogonal projection of the suppression layer 4 on the substrate 100 covers the light-emitting area of the first light-emitting device W1 and the light-emitting area of 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 area. The fabrication process of the second transparent film 202 may, for example, firstly, vapor-deposit the suppression material, then etch to form the suppression layer 4 with the first opening 41; subsequently, vapor-deposit the MgAg alloy material, and by means of the property of the suppression layer 4 to suppress the film formation of the MgAg alloy material, confine the MgAg alloy material within the first opening 41, thereby forming the second transparent film 202.
[0086] For example, the material of the inhibition layer 4 may 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-bis(naphthyl-2-yl)anthracene; (j) 4,4′-bis(N-carbazolyl)-1,1′-biphenyl; (k) bis(2-methyl-8-quinolinic acid)-4-(phenylphenol)aluminum; (l) 9-[1,1′-biphenyl]-3-yl-9H-carbazolium; (m) tris[2-phenylphenylpyridinium-C2,N]iridium(III).
[0087] In some embodiments, FIG11 is a schematic diagram of the display panel of Example 8 provided in the present disclosure, and FIG12 is a schematic diagram of the display panel of Example 9 provided in the present disclosure. As shown in FIG11 or FIG12, 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 includes an inhibition 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, which are connected as an integral structure, away from the substrate 100. The inhibition layer 4 has a first opening 41 and a second opening 42 extending through it along its thickness direction. 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 is in contact with the first light-transmitting film 201. The fifth light-transmitting film 205 is confined within the second opening 42 and is 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.
[0088] Similar to the technical means used in Example 3 to solve the technical problem, i.e., the first light-emitting device W1 adopts a second microcavity structure and the third light-emitting device W3 adopts a first microcavity structure, however, Example 8 differs 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, both the second and fifth light-transmitting films 202 and 205 are made of an alloy of magnesium and silver, or both are made of an alloy of magnesium and aluminum. The orthogonal projection of the suppression layer 4 onto the substrate 100 covers the light-emitting area of the first light-emitting device W1, the first opening 41 faces the light-emitting unit 3 of the second light-emitting device W2 located in the light-emitting area, and the second opening 42 faces the light-emitting unit 3 of the third light-emitting device W3 located in the light-emitting area. The second transparent film 202 and the fifth transparent film 205 are prepared by a single patterning process. For example, an inhibition material can be first deposited by vapor deposition, and an inhibition layer 4 with a first opening 41 and a second opening 42 can be etched to form the inhibition layer 4. Then, MgAg alloy material is deposited by vapor deposition. By utilizing the property of the inhibition layer 4 to inhibit the film formation of MgAg alloy material, the MgAg alloy material is confined within the first opening 41 and the second opening 42, thereby forming the second transparent film 202 and the fifth transparent film 205.
[0089] Similar to the technical means used in Example 5 to solve the technical problem, i.e., the first light-emitting device W1 adopts a first microcavity structure and the third light-emitting device W3 adopts a second microcavity structure. However, the difference between Example 9 and Example 5 is that, as shown in Figure 12, the fifth transparent film 205 of the first light-emitting device W1 is completely confined within the second opening 42. Optionally, the materials of the second transparent film 202 and the fifth transparent film 205 are both alloys of magnesium and silver, or both alloys of magnesium and aluminum. The orthogonal projection of the suppression layer 4 onto the substrate 100 covers the light-emitting area of the third light-emitting device W3. The first opening 41 faces the light-emitting unit 3 of the second light-emitting device W2 located in the light-emitting area, and the second opening 42 faces the light-emitting unit 3 of the first light-emitting device W1 located in the light-emitting area. The second transparent film 202 and the fifth transparent film 205 are prepared using a single patterning process, as detailed in the preparation process of Example 8 above, and the principles are the same.
[0090] Optionally, the suppression layer 4 is an insulating layer with high light transmittance. The light transmittance of the suppression layer 4 is greater than 80%.
[0091] For the above embodiments, whether it is the second light-transmitting film 202 or the fifth light-transmitting film 205, when the material is selected as an alloy of magnesium and silver, the relationship of transmittance of light of different wavelengths at different thicknesses is shown in Figure 13.
[0092] It should be noted that when the second transparent film 202 is made of a magnesium-silver alloy, the first transparent film 201 can be made of a magnesium-aluminum alloy. With other structural parameters remaining unchanged, the transmittance of the magnesium-aluminum alloy is greater than that of the magnesium-silver alloy. Similarly, when the fifth transparent film 205 is made of a magnesium-silver alloy, the fourth transparent film 204 can be made of a magnesium-aluminum alloy.
[0093] In some embodiments, as shown in Figures 3 to 12, the orthogonal projection of the red filter CF-R on the substrate 100 covers the orthogonal projection of the first light-emitting device W1 on the substrate 100; the orthogonal projection of the green filter CF-G on the substrate 100 covers the orthogonal projection of the second light-emitting device W2 on the substrate 100; and the orthogonal projection of the blue filter CF-B on the substrate 100 covers the orthogonal projection of the third light-emitting device W3 on the substrate 100.
[0094] Optionally, adjacent color filters are in direct contact without a black matrix to improve PPI.
[0095] In some embodiments, FIG14 is a structural diagram of the anode of different sub-pixels provided in the embodiments of the present disclosure. As shown in FIG14, 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 sequentially along the Z direction away from the substrate 100, and the third sub-layer 13 is electrically connected to 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 sequentially along the Z direction away from the 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 sequentially along the Z direction away from the substrate 100; the materials of the first sub-layer 11, the fourth sub-layer 14 and the sixth sub-layer 16 are all metals, the materials of the third sub-layer 13, the fifth sub-layer 15 and the seventh sub-layer 17 are all transparent metal oxides, and the material of the second sub-layer 12 is a transparent insulating material.
[0096] In some embodiments, as shown in FIG14, the first sublayer 11, the fourth sublayer 14, and the sixth sublayer 16 are all made of the same material; the third sublayer 13, the fifth sublayer 15, and the seventh sublayer 17 are all made of the same material.
[0097] 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), and gold (Au); the material of the second sub-layer 12 can be selected from indium tin oxide (ITO) or silicon oxide (SiO); and 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 transmittance, which can improve the white light emission efficiency. The silicon oxide (SiO) layer, as an optical adjustment layer, can be used to adjust the microcavity length of the second light-emitting device W2.
[0098] 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), and 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 transmittance; the combination of the two improves the white light emission efficiency.
[0099] Optionally, for the third light-emitting device W3, the material of the fifth sublayer 15 can be selected from any one of silver (Ag), magnesium (Mg), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), and gold (Au); the material of the sixth sublayer 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 transmittance; the combination of the two improves the white light emission efficiency.
[0100] In some embodiments, as shown in FIG14, the first sublayer 11, the fourth sublayer 14 and the sixth sublayer 16 are connected to form an integral structure, the material of which is selected from silver (Ag), which is beneficial to improving light reflectivity.
[0101] It should be noted that the third sub-layer 13, the fifth sub-layer 15 and the seventh sub-layer 17 are spaced apart from each other and can be isolated by the insulating barrier structure 10.
[0102] In some embodiments, FIG15 is a film layer diagram of the light-emitting unit provided in the present disclosure. As shown in FIG15, the light-emitting unit 3 includes 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, which are sequentially disposed along the Z direction away from the substrate 100. Holes are generated at the anode (first electrode 1) and transported 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. Electrons are generated at the charge separation generation layer CGL and transported to the red light-emitting layer R-EML and the green light-emitting layer G-EML. Holes and electrons in the red light-emitting layer R-EML and the green light-emitting layer G-EML recombine to emit yellow light. Simultaneously, holes generated in the charge separation generation layer CGL are transported to the blue emitting layer B-EML via the hole transport layer HTL. Electrons generated in the cathode (second electrode 2) are transported to the blue emitting layer B-EML via the electron injection layer EIL and the electron transport layer ETL. Holes and electrons in the blue emitting layer B-EML recombine to emit blue light. The blue light mixes with yellow light to form white light. The white light passes through a color filter and emits light of a specific color, such as red, green, and blue.
[0103] In some embodiments, as shown in Figures 3 to 12, the display panel further includes an encapsulation layer 4 disposed on the side of the light-emitting device near the color filter 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 may include a first inorganic encapsulation layer (not shown in the figures), an organic encapsulation layer (not shown in the figures), and a second inorganic encapsulation layer (not shown in the figures) disposed sequentially, for example, silicon nitride (SiN) + ink + silicon nitride (SiN).
[0104] In some embodiments, as shown in Figures 3 to 12, the display panel further includes a driving layer 200 disposed on the side of the first electrode 1 near the substrate 100. The driving layer 200 includes a pixel driving circuit for driving a light-emitting device (OLED). The pixel driving circuit includes at least a driving transistor, a data writing transistor, and a storage capacitor. For example, the pixel driving circuit may be, but is not limited to, a 7T1C (7 transistors and 1 capacitor) circuit structure.
[0105] In addition, this disclosure also provides a display device, which includes the display substrate of any of the above embodiments. This display device can be, for example, any product with display functionality such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or in-vehicle device. Other essential components of this display device are those that should be understood by those skilled in the art, and will not be described in detail here, nor should they be construed as limiting this disclosure.
[0106] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.
Claims
1. A display panel comprising a substrate, a red sub-pixel, a green sub-pixel, and a blue sub-pixel disposed on the substrate, wherein 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, and 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, wherein, 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, wherein, 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, wherein, 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, wherein, 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, wherein, 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, wherein, 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, wherein, 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, wherein, 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, wherein, 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, wherein, 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, wherein, 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, wherein, 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, wherein, 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, wherein, Includes the display panel as described in any one of claims 1 to 14.