Display panel and display apparatus

Abstract

The present application relates to the technical field of displays, and discloses a display panel and a display apparatus. The display panel comprises a drive backplane, a plurality of light-emitting devices, and a plurality of reflective portions. The plurality of light-emitting devices comprises a plurality of first-type light-emitting devices and a plurality of second-type light-emitting devices. The reflective portions corresponding to the first-type light-emitting devices are first reflective portions, and the reflective portions corresponding to the second-type light-emitting devices are second reflective portions. The first reflective portions are relatively effective in reflecting light emitted by the first-type light emitting devices that travels in a direction toward the drive backplane, and the second reflective portions are relatively effective in reflecting light emitted by the second-type light emitting devices that travels in the direction toward the drive backplane, thereby improving display panel light extraction efficiency. Within a reflected-light wavelength range of each reflective portion, a phase shift of the reflected light reflected by the respective reflective portion is continuous and gradual, without abrupt changes, thereby preventing spurious peaks from appearing in a spectrum of emitted light from the display panel, resulting in a good display effect of the display panel.

Description

Display panel and display device

[0001] This application claims priority to Chinese Patent Application No. 202510096099.8, filed on January 21, 2025, entitled “Display Panel and Display Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of display technology, and in particular to a display panel and display device. Background Technology

[0003] Organic light-emitting diode (OLED) display panels are hailed as the next generation of display devices due to their advantages such as self-illumination, high efficiency, vibrant colors, thinness, energy saving, and rollability, and have attracted increasing attention in recent years.

[0004] However, current OLED display panels have low light extraction efficiency. In order to increase brightness, the current can only be increased, resulting in high power consumption and short lifespan of display devices. Summary of the Invention

[0005] This application provides a display panel and a display device. It can solve the problem of low light extraction efficiency in existing OLED display panels. The technical solution is as follows:

[0006] On one hand, a display panel is provided, including: a driving backplate, multiple light-emitting devices, and multiple reflective parts;

[0007] The plurality of light-emitting devices are distributed on one side of the driving backplate and electrically connected to the driving backplate. The plurality of light-emitting devices include a plurality of first-type light-emitting devices and a plurality of second-type light-emitting devices.

[0008] Each of the multiple reflective portions corresponds one-to-one with a multiple of the multiple light-emitting devices. The reflective portion is located between the corresponding light-emitting device and the driving backplate. The reflective portion includes multiple layers of first inorganic layer and multiple layers of second inorganic layer stacked together. The multiple layers of first inorganic layer and multiple layers of second inorganic layer are arranged alternately.

[0009] Wherein, the reflective part corresponding to the first type of light-emitting device is the first reflective part, and the reflective part corresponding to the second type of light-emitting device is the second reflective part; the thickness of the first inorganic layer in the first reflective part is different from the thickness of the first inorganic layer in the second reflective part, and the thickness of the second inorganic layer in the first reflective part is different from the thickness of the second inorganic layer in the second reflective part.

[0010] Optionally, the first reflective part contacts the side of the driving back plate facing the first type of light-emitting device, and the second reflective part contacts the side of the driving back plate facing the second type of light-emitting device.

[0011] Optionally, the first reflective portion contacts the side of the driving backplate facing the first type of light-emitting device; the display panel further includes: a first auxiliary reflective portion, the first auxiliary reflective portion being located between the second reflective portion and the driving backplate, and the first auxiliary reflective portion contacting the side of the driving backplate facing the second type of light-emitting device.

[0012] Optionally, the first auxiliary reflective part is disposed in the same layer as the first reflective part and is made of the same material.

[0013] Optionally, the plurality of second-type light-emitting devices include: a plurality of light-emitting devices for emitting first-color light, and a plurality of light-emitting devices for emitting second-color light;

[0014] Wherein, the second reflective part corresponding to the light-emitting device for emitting the first color light is the first color light reflective part, and the second reflective part corresponding to the light-emitting device for emitting the second color light is the second color light reflective part;

[0015] The first color light reflective part and the second color light reflective part are disposed in the same layer and are made of the same material; or, the first color light reflective part and the second color light reflective part are disposed in different layers.

[0016] Optionally, when the first color light reflector and the second color light reflector are disposed in different layers, the display panel further includes: a second auxiliary reflector, which is located between the second color light reflector and the driving backplate;

[0017] The second auxiliary reflective part is disposed in the same layer as the first color light reflective part and is made of the same material.

[0018] Optionally, the thickness of the first inorganic layer in the first color light reflective part is different from the thickness of the first inorganic layer in the second color light reflective part, and the thickness of the second inorganic layer in the first color light reflective part is different from the thickness of the second inorganic layer in the second color light reflective part.

[0019] Optionally, the first type of light-emitting device is used to emit red light, the first color light is green light, and the second color light is blue light.

[0020] Optionally, the reflective part has a first light coupling structure on the side opposite to the drive back plate, and the first light coupling structure has multiple parallel first linear grooves.

[0021] The structural parameters of the first light-coupled structure in the first reflective part are different from those of the first light-coupled structure in the second reflective part.

[0022] Optionally, the structural parameters of the first optical coupling structure include at least one of the following: the center distance between two adjacent first linear grooves, the depth of the first linear groove, and the duty cycle of the first optical coupling structure.

[0023] Optionally, the light-emitting device includes a first electrode, a light-emitting layer, and a second electrode stacked together; the first electrode is electrically connected to the driving backplate.

[0024] The first electrode is a light-transmitting electrode, and the second electrode is a semi-transmitting and semi-reflective electrode.

[0025] Optionally, the light-emitting layer includes at least two sub-light-emitting layers and a charge-generating layer located between two adjacent sub-light-emitting layers;

[0026] In the same light-emitting device, the light emitted by each of the sub-light-emitting layers is of the same color.

[0027] Optionally, the sub-light-emitting layer includes a hole transport layer, wherein the sum of the thicknesses of at least two hole transport layers in the light-emitting layer is less than 100 nanometers.

[0028] On the other hand, a display panel is provided, including: a driving backplate and a plurality of light-emitting devices;

[0029] The plurality of light-emitting devices are distributed on one side of the driving backplate, and the plurality of light-emitting devices include a plurality of first-type light-emitting devices and a plurality of second-type light-emitting devices;

[0030] The light-emitting device includes a first electrode, a light-emitting layer, and a second electrode stacked together; the first electrode is electrically connected to the driving backplate; the first electrode is a reflective electrode, and the second electrode is a light-transmitting electrode; and the side of the reflective electrode facing away from the driving backplate has a second light coupling structure, and the second light coupling structure has multiple parallel second linear grooves.

[0031] The structural parameters of the second optical coupling structure in the first type of light-emitting device are different from those of the second optical coupling structure in the second type of light-emitting device.

[0032] In another aspect, a display device is provided, comprising: a display panel and a driver chip, wherein the display panel is any of the display panels described above, and the driver chip is used to apply a driving signal to the display panel.

[0033] The beneficial effects of the technical solutions provided in this application include at least the following:

[0034] The multiple light-emitting devices in this application embodiment may include multiple first-type light-emitting devices and multiple second-type light-emitting devices. The reflective portion corresponding to the first-type light-emitting device is called the first reflective portion, and the reflective portion corresponding to the second-type light-emitting device is called the second reflective portion. The first reflective portion effectively reflects the light emitted from the first-type light-emitting device that travels in the direction toward the driving backplane, while the second reflective portion effectively reflects the light emitted from the second-type light-emitting device that travels in the direction toward the driving backplane, thereby improving the light emission efficiency of the display panel. Furthermore, within the reflected light wavelength range of each reflective portion, the phase change of the reflected light is continuous and gradual, and the phase of the reflected light does not undergo abrupt changes, avoiding spectral clutter in the emitted light of the display panel and resulting in a better display effect. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 is a graph of the light absorption rate of the first electrode provided by the related technology;

[0037] Figure 2 is a graph of the reflectivity of the first electrode provided by the related technology;

[0038] Figure 3 is a schematic diagram of the film layer structure of a display panel provided in an embodiment of this application;

[0039] Figure 4 is a schematic diagram of the film structure of a single reflective part provided in an embodiment of this application;

[0040] Figure 5 is a graph showing the reflectivity of the second reflective part provided in the embodiment of this application;

[0041] Figure 6 is a graph showing the phase change of the reflected light from the second reflective part provided in the embodiment of this application;

[0042] Figure 7 is a schematic diagram of the film structure of a light-emitting device provided in an embodiment of this application;

[0043] Figure 8 is a schematic diagram of the film layer structure of another display panel provided in an embodiment of this application;

[0044] Figure 9 is a schematic diagram of the film layer structure of another display panel provided in an embodiment of this application;

[0045] Figure 10 is a schematic diagram of the film layer structure of another display panel provided in an embodiment of this application;

[0046] Figure 11 is a schematic diagram of the film layer structure of a display panel according to another embodiment of this application;

[0047] Figure 12 is a schematic diagram of the optical path of the optical waveguide inside the first electrode of the light-emitting device provided in the embodiment of this application;

[0048] Figure 13 is a schematic diagram of a single reflective part provided in an embodiment of this application;

[0049] Figure 14 is a schematic diagram of the film layer structure of another display panel provided in another embodiment of this application;

[0050] Figure 15 is a schematic diagram of the structure of the first electrode in the light-emitting device in Figure 14. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0052] In related technologies, an OLED display panel may include a driving backplane and multiple light-emitting devices located on the driving backplane. Each light-emitting device includes a first electrode, a light-emitting layer, and a second electrode. The first electrode is electrically connected to the driving backplane. To increase the light extraction efficiency of the display panel, the first electrode can be a reflective metal electrode, and the second electrode can be a transparent electrode. In this way, the first electrode can reflect light emitted from the light-emitting layer in the direction towards the driving backplane, and the reflected light can be emitted in a direction away from the driving backplane.

[0053] However, when the first electrode is a metal reflective electrode, the metal reflective electrode will have a certain absorption effect on short-wavelength light, resulting in poor reflection of short-wavelength light. For example, please refer to Figures 1 and 2. Figure 1 is a graph of the light absorptivity of the first electrode provided by the related technology, and Figure 2 is a graph of the reflectivity of the first electrode provided by the related technology. In Figure 1, the horizontal axis represents the wavelength of the light emitted by the light-emitting device, and the vertical axis represents the light absorptivity of the first electrode. In Figure 2, the horizontal axis represents the wavelength of the light emitted by the light-emitting device, and the vertical axis represents the reflectivity of the first electrode. In the wavelength range of 430 nm to 550 nm, the metal reflective electrode has a relatively high absorption rate for light in this wavelength range. For example, when the wavelength of the light emitted by the light-emitting device is in this wavelength range of 430 nm to 550 nm, the metal reflective electrode will have an absorption rate of 4% to 10% for the light emitted by the light-emitting device, resulting in a low reflectivity of the light emitted by the light-emitting device.

[0054] Please refer to Figure 3, which is a schematic diagram of the film structure of a display panel according to an embodiment of this application. The display panel 000 includes: a driving backplate 100, a plurality of light-emitting devices 200, and a plurality of reflective parts 300.

[0055] The multiple light-emitting devices 200 in the display panel 000 are distributed on one side of the driving back plate 100 and electrically connected to the driving back plate 100. The driving back plate 100 can drive the multiple light-emitting devices 200 to emit light, so that the display panel 000 can display the corresponding image.

[0056] The plurality of light-emitting devices 200 may include a plurality of first-type light-emitting devices 210 and a plurality of second-type light-emitting devices 220. The wavelengths of the light emitted by the plurality of first-type light-emitting devices 210 are different from the wavelengths of the light emitted by the plurality of second-type light-emitting devices 220. For example, all of the plurality of first-type light-emitting devices 210 may be used to emit red light; a portion of the plurality of second-type light-emitting devices 220 may be used to emit green light, and another portion may be used to emit blue light.

[0057] In the display panel 000, multiple reflective portions 300 correspond one-to-one with multiple light-emitting devices 200, and the reflective portions 300 are located between the corresponding light-emitting device 200 and the driving backplate 100. The multiple reflective portions 300 are used to reflect the light emitted by their corresponding light-emitting devices 200 that travels in the direction toward the driving backplate 100, so that the reflected light can be emitted in a direction away from the driving backplate 100, thereby improving the light extraction efficiency of the display panel 000. In this application, the reflective portion 300 corresponding to the first type of light-emitting device 210 is a first reflective portion 310, and the reflective portion 300 corresponding to the second type of light-emitting device 220 is a second reflective portion 320.

[0058] As shown in Figure 4, which is a schematic diagram of the film layer structure of a single reflective part according to an embodiment of this application, the reflective part 300 includes multiple layers of first inorganic layers 301 and multiple layers of second inorganic layers 302 stacked together, with the multiple layers of first inorganic layers 301 and multiple layers of second inorganic layers 302 arranged alternately. That is, a second inorganic layer 302 is distributed between two adjacent first inorganic layers 301, and a first inorganic layer 301 is distributed between two adjacent second inorganic layers 302. In the reflective part 300, the adjacent layers of first inorganic layers 301 and second inorganic layers 302 together form a reflective layer group 300a. In the same reflective layer group 300a, the first inorganic layer 301 is closer to the driving backplate 100 than the second inorganic layer 302. That is, the reflective part 300 in the display panel 000 can be a distributed Bragg reflector.

[0059] In one possible implementation, the refractive index of the first inorganic layer 301 is less than that of the second inorganic layer 302, and the thickness of the first inorganic layer 301 is greater than that of the second inorganic layer 302. For example, the first inorganic layer 301 in the reflective part 300 may be made of silicon dioxide, and the second inorganic layer 302 in the reflective part 300 may be made of niobium pentoxide.

[0060] It should be noted that in order to make the reflective part 300 reflect specific light better, the thickness of the first inorganic layer 301 and the second inorganic layer 302 in the reflective part 300 can be adjusted separately according to the different wavelengths of these light rays.

[0061] Furthermore, since the wavelength of the light emitted by the first type of light-emitting device 210 is different from the wavelength of the light emitted by the second type of light-emitting device 220, the thickness of the first inorganic layer 301 in the first reflective part 310 corresponding to the first type of light-emitting device 210 and the thickness of the first inorganic layer 301 in the second reflective part 320 need to be different, and the thickness of the second inorganic layer 302 in the first reflective part 310 needs to be different from the thickness of the second inorganic layer 302 in the second reflective part 320.

[0062] It should be noted that the product of the thickness of a single inorganic layer in a distributed Bragg mirror and the refractive index of that inorganic layer is equal to one-quarter of the center wavelength.

[0063] For example, the thickness of a single inorganic layer in the first reflective portion 310 can be calculated using a center wavelength of 590 nanometers. For instance, the thickness of the first inorganic layer 301 in the first reflective portion 310 can be 100.97 nanometers, and the thickness of the second inorganic layer 302 in the first reflective portion 310 can be 64.08 nanometers, so that the first reflective portion 310 can reflect the red light emitted by the first type of light-emitting device 210.

[0064] The thickness of a single inorganic layer in the second reflective part 320 can be calculated using a center wavelength of 490 nanometers. For example, the thickness of the first inorganic layer 301 in the second reflective part 320 can be 83.49 nanometers, and the thickness of the second inorganic layer 302 in the second reflective part 320 can be 51.82 nanometers, so that the second reflective part 320 can reflect the green or blue light emitted by the second type of light-emitting device 220.

[0065] In this way, it can be ensured that the first reflector 310 has a good effect on reflecting the light emitted by the first type of light-emitting device 210 that is transmitted in the direction toward the driving back plate 100, and it can also be ensured that the second reflector 320 has a good effect on reflecting the light emitted by the second type of light-emitting device 220 that is transmitted in the direction toward the driving back plate 100.

[0066] For example, please refer to Figure 5, which is a graph showing the reflectivity of the second reflective portion provided in this embodiment. The horizontal axis represents the wavelength of the light emitted by the light-emitting device 200, and the vertical axis represents the reflectivity of the second reflective portion 320. The second reflective portion 320 reflects green and blue light in the 430 nm to 550 nm wavelength range. Within this wavelength range, the reflectivity of the second reflective portion 320 is 100%. The second reflective portion 320 effectively reflects light emitted by the second type of light-emitting device 220 that travels in the direction toward the driving backplate 100.

[0067] This can effectively improve the light emission efficiency of the display panel 000, thereby increasing the brightness of the display panel 000 without increasing the current, thus reducing the power consumption of the display panel 000 and extending its service life.

[0068] Furthermore, since the thickness of the multiple first inorganic layers 310 and the thickness of the multiple second inorganic layers 320 in each reflective part 300 are the same, the phase change of the reflected light reflected by each reflective part 300 is continuous and gradual within the wavelength range of the reflected light of each reflective part 300. The phase of the reflected light will not change abruptly, thus avoiding the appearance of spurious peaks in the spectrum of the emitted light of the display panel 000, resulting in a better display effect of the display panel 000.

[0069] For example, please refer to Figure 6, which is a graph showing the phase change of the reflected light from the second reflective part provided in this embodiment. The horizontal axis represents the wavelength of the reflected light, and the vertical axis represents the phase of the reflected light. The second reflective part 320 reflects green and blue light in the 430 nm to 550 nm wavelength range. Within this wavelength range, the phase change of the reflected light is continuous and gradual; the phase of the reflected light does not undergo abrupt changes. That is, within this wavelength range, the phase of the reflected light does not undergo abrupt changes, such as those occurring at a wavelength of 580 nm.

[0070] In summary, the display panel provided in this application includes: a driving backplate, multiple light-emitting devices, and multiple reflective portions. The multiple light-emitting devices may include multiple first-type light-emitting devices and multiple second-type light-emitting devices. The reflective portion corresponding to the first-type light-emitting devices is a first reflective portion, and the reflective portion corresponding to the second-type light-emitting devices is a second reflective portion. The first reflective portion effectively reflects light emitted from the first-type light-emitting devices that travels towards the driving backplate, while the second reflective portion effectively reflects light emitted from the second-type light-emitting devices that travels towards the driving backplate, thereby improving the light extraction efficiency of the display panel. Furthermore, within the wavelength range of the reflected light from each reflective portion, the phase change of the reflected light is continuous and gradual, without abrupt phase changes, avoiding spectral clutter in the emitted light of the display panel and resulting in a better display effect.

[0071] In this embodiment of the application, please refer to FIG7, which is a schematic diagram of the film structure of a light-emitting device provided in this embodiment of the application. The light-emitting device 200 in the display panel 000 includes a first electrode 201, a light-emitting layer 202 and a second electrode 203 stacked together, and the first electrode 201 is electrically connected to the driving backplate 100.

[0072] The light-emitting device 200 and its corresponding reflective portion 300 in the display panel 000 can form a microcavity structure. In this case, the first electrode 201 is a light-transmitting electrode, and the second electrode 203 is a semi-transmitting and semi-reflective electrode. For example, the first electrode 201 can be made of indium tin oxide, and the second electrode 203 can be made of magnesium silver alloy. A portion of the light emitted from the light-emitting layer 202 of the light-emitting device 200 that is incident on the second electrode 203 can pass through the second electrode 203 and be emitted, while another portion of the light can be reflected by the second electrode 203. The light reflected by the second electrode 203, as well as the light emitted from the light-emitting layer 202 of the light-emitting device 200 that is incident on the first electrode 201, can all pass through the first electrode 201 and be incident on the reflective portion 300, which can then reflect these rays back to the second electrode 203. In this way, the light reflected by the reflective part 300 and the light emitted from the light-emitting layer 202 that is directed towards the second electrode 203 can generate a coherently enhanced microcavity effect, improving the light extraction efficiency of the light-emitting device 200 and resulting in a better display effect for the display panel 000. Furthermore, since the phase of the reflected light reflected by the reflective part 300 is continuous and smooth, it can better match the conditions for microcavity enhancement, thereby further increasing the light extraction efficiency.

[0073] In this embodiment, the light-emitting layer 202 in the light-emitting device 200 may include at least two sub-light-emitting layers 202a, and the light emitted by each sub-light-emitting layer 202a in the same light-emitting device 200 is of the same color. By stacking multiple sub-light-emitting layers 202a, the charge transport and recombination processes are optimized, significantly improving luminous efficiency and operating life. Each sub-light-emitting layer 202a may include a hole injection layer (HIL), a hole transport layer (HTL), a light-emitting material layer (EML), an electron transport layer (ETL), and an electron injection layer (EIL).

[0074] In this case, the light-emitting layer 202 in the display panel 000 may also include a charge generation layer CGL located between two adjacent sub-light-emitting layers, which is used to connect the two adjacent sub-light-emitting layers 202a in series, thereby further improving the stability and service life of the light-emitting device 200.

[0075] When the light-emitting layer 202 in the light-emitting device 200 includes a single sub-light-emitting layer 202a, the thickness of the hole transport layer (HTL) in the light-emitting layer 202 is greater than 100 nanometers. However, when the light-emitting layer 202 in the light-emitting device 200 includes multiple sub-light-emitting layers 202a, the sum of the thicknesses of the hole transport layer (HTL) in each sub-light-emitting layer 202a is less than 100 nanometers. With a smaller hole transport layer (HTL) thickness, light absorption loss in the hole transport layer (HTL) can be effectively reduced, further improving the light extraction efficiency of the display panel 000.

[0076] In this embodiment, the cavity length of the microcavity structure formed by the light-emitting device 200 and its corresponding reflective portion 300 in the display panel 000 is the distance between the second electrode 203 in the light-emitting device 200 and the reflective portion 300 corresponding to the light-emitting device 200. Since the cavity length of the microcavity structure is affected by the wavelength of the light emitted by the light-emitting device 200, the cavity length can be adjusted to enable the microcavity structure formed by the light-emitting device 200 and its corresponding reflective portion 300 to produce a coherently enhanced microcavity effect for light of a specific wavelength emitted by the light-emitting device 200.

[0077] When the wavelength of the light emitted by the first type of light-emitting device 210 is different from the wavelength of the light emitted by the second type of light-emitting device 220, the cavity lengths of the first type of light-emitting device 210 and the second type of light-emitting device 220 can be set to be different, so that the cavity length of the microcavity structure can be better matched with the wavelength of the light emitted by the light-emitting device 200.

[0078] It should be noted that the thickness of the reflective layer group 300a in the reflective part 300 that contacts the light-emitting device 200 can be different from the thickness of other reflective layer groups 300a in the reflective part 300. In this way, by appropriately adjusting the thickness of the reflective layer group 300a in the reflective part 300 that contacts the light-emitting device 200, the cavity length of the microcavity structure can be better matched.

[0079] To ensure that the thickness of the microcavity structure of the first type of light-emitting device 210 differs from the thickness of the microcavity structure of the second type of light-emitting device 220, the cavity length of the microcavity structure of each type of light-emitting device 200 is better matched to the wavelength of the light emitted by the light-emitting device 200. The multiple reflective portions 300 in the display panel 000 have various possible design configurations to adjust the cavity length of the microcavity structure of each type of light-emitting device 200. This application will illustrate two possible design configurations as examples:

[0080] In the first possible design, as shown in Figure 3, the first reflective part 310 in the display panel 000 contacts the side of the driving back plate 100 facing the first type of light-emitting device 210, and the second reflective part 320 in the display panel 000 contacts the side of the driving back plate 100 facing the second type of light-emitting device 220.

[0081] In this case, the cavity length of the microcavity structure of the light-emitting device 200 corresponding to the reflective part 300 can be adjusted by controlling the number of reflective layer groups 300a in the reflective part 300. For example, when the wavelength of the light emitted by the first type of light-emitting device 210 is greater than the wavelength of the light emitted by the second type of light-emitting device 220, the number of reflective layer groups 300a in the first reflective part 310 corresponding to the first type of light-emitting device 210 is less than the number of reflective layer groups 300a in the second reflective part 320 corresponding to the second type of light-emitting device 220. In this way, the thickness of the first reflective part 310 can be less than the thickness of the second reflective part 320, making the thickness of the microcavity structure of the first type of light-emitting device 210 larger, which can better match the longer wavelength light emitted by the first type of light-emitting device 210. The thickness of the microcavity structure of the second type of light-emitting device 220 is smaller, which can better match the shorter wavelength light emitted by the second type of light-emitting device 220, thereby enhancing the microcavity effect of the display panel 000 and improving the light emission efficiency of the display panel 000.

[0082] Furthermore, because the second reflective section 320 has a larger number of reflective layer groups 300a, the reflectivity of the second reflective section 320 can be effectively improved, further enhancing the light emission efficiency of the display panel 000. This increases the utilization of blue light when displaying the same white image, thereby reducing blue light power consumption and extending the lifespan of the device.

[0083] In the second possible design, please refer to Figure 8, which is a schematic diagram of the film structure of another display panel provided in an embodiment of this application. The first reflective portion 310 in the display panel 000 contacts the side of the driving backplate 100 facing the first type of light-emitting device 210. The display panel 000 also includes a first auxiliary reflective portion 330, which is located between the second reflective portion 320 and the driving backplate 100, and contacts the side of the driving backplate 100 facing the second type of light-emitting device 220.

[0084] In this case, the first auxiliary reflector 330 in the display panel 000 can be used to adjust the cavity length of the microcavity structure. When the wavelength of the light emitted by the first type of light-emitting device 210 is greater than the wavelength of the light emitted by the second type of light-emitting device 220, since the first auxiliary reflector 330 is located between the second reflector 320 and the driving backplate 100, the thickness of the microcavity structure of the second type of light-emitting device 220 is less than the thickness of the microcavity structure of the first type of light-emitting device 210. As a result, the microcavity structure of the second type of light-emitting device 220 can be better matched with the shorter wavelength light emitted by the second type of light-emitting device 220, and the microcavity structure of the first type of light-emitting device 210 can be better matched with the longer wavelength light emitted by the first type of light-emitting device 210, thereby enhancing the microcavity effect of the display panel 000 and improving the light extraction efficiency of the display panel 000.

[0085] In this application, the first auxiliary reflective portion 330 in the display panel 000 can be disposed in the same layer as the first reflective portion 310 and made of the same material. That is, the first auxiliary reflective portion 330 includes multiple layers of first inorganic layers 301 and multiple layers of second inorganic layers 302 stacked together, and the multiple layers of first inorganic layers 301 and multiple layers of second inorganic layers 302 are arranged alternately. The thickness of the first inorganic layer 301 in the first auxiliary reflective portion 330 can be the same as the thickness of the first inorganic layer 301 in the first reflective portion 310, and the thickness of the second inorganic layer 302 in the first auxiliary reflective portion 330 can be the same as the thickness of the second inorganic layer 302 in the first reflective portion 310.

[0086] It should be noted that, in this application, "two structures are configured in the same layer and are identical" means that the film layer containing these two structures is the same film layer, and they can be formed simultaneously through the same patterning process. For example, each first inorganic layer 301 in the first auxiliary reflective part 330 and the corresponding first inorganic layer 301 in the first reflective part 310 are the same inorganic layer, and each first inorganic layer 301 in the first auxiliary reflective part 330 and the corresponding first inorganic layer 301 in the first reflective part 310 can be formed simultaneously. Similarly, each second inorganic layer 302 in the first auxiliary reflective part 330 and the corresponding second inorganic layer 302 in the first reflective part 310 are the same inorganic layer, and each second inorganic layer 302 in the first auxiliary reflective part 330 and the corresponding second inorganic layer 302 in the first reflective part 310 can be formed simultaneously. Thus, during the fabrication of the display panel 000, the first auxiliary reflective part 330 and the first reflective part 310 are formed synchronously.

[0087] In this application, when the display panel 000 includes a first auxiliary reflector 330, since the first auxiliary reflector 330 and the first reflector 310 are formed simultaneously, the first auxiliary reflector 330, which is positioned facing the driving backplate side of the second type of light-emitting device 220, can be normally retained during the fabrication of the first reflector 310, eliminating the need for a separate patterning process to fabricate the first auxiliary reflector 330. Only the second reflector 320 needs to be fabricated using a patterning process, thereby simplifying the fabrication process of the display panel 000.

[0088] In this embodiment of the application, as shown in FIG9, when the plurality of second-type light-emitting devices 220 in the display panel 000 may include a plurality of light-emitting devices 221 for emitting first-color light and a plurality of light-emitting devices 222 for emitting second-color light, the second reflective part 320 corresponding to the light-emitting device 221 for emitting first-color light is the first-color light reflective part 321, and the second reflective part 320 corresponding to the light-emitting device 222 for emitting second-color light is the second-color light reflective part 322.

[0089] It should be noted that the first type of light-emitting device 210 in the display panel 000 can emit red light, the first color light emitted by the light-emitting device 221 can be green light, and the second color light emitted by the light-emitting device 222 can be blue light. Here, the display panel 000 can display corresponding color images by controlling the three types of light-emitting devices.

[0090] In this case, the first color light reflector 321 and the second color light reflector 322 in the display panel 000 can be implemented in various ways. This application will illustrate the following two possible implementations as examples:

[0091] For a first possible implementation, please refer to Figures 9 and 10. Figure 9 is a schematic diagram of the film layer structure of another display panel provided in an embodiment of this application, and Figure 10 is a schematic diagram of the film layer structure of yet another display panel provided in an embodiment of this application. The first color light reflective part 321 and the second color light reflective part 322 in the display panel 000 are disposed in the same layer and made of the same material. Therefore, during the fabrication process of the display panel 000, the first color light reflective part 321 and the second color light reflective part 322 are formed simultaneously, simplifying the fabrication process of the display panel 000.

[0092] Since the refractive index of the first inorganic layer 301 and the refractive index of the second inorganic layer 302 affect the range of the reflection band of the reflective part 300, when the first color light reflective part 321 and the second color light reflective part 322 in the display panel 000 are arranged in the same layer and are made of the same material, it is necessary to select the first inorganic layer 301 and the second inorganic layer 302 with appropriate refractive indices so that the reflection band of the second reflective part 320 can cover the wavelength range of the first color light and the second color light.

[0093] For example, the first inorganic layer 301 in the reflective portion 300 can be made of silicon dioxide, and the second inorganic layer 302 in the reflective portion 300 can be made of niobium pentoxide. The thickness of a single inorganic layer in the first reflective portion 310 can be calculated using a center wavelength of 590 nanometers. For instance, the thickness of the first inorganic layer 301 in the first reflective portion 310 can be 100.97 nanometers, and the thickness of the second inorganic layer 302 in the first reflective portion 310 can be 64.08 nanometers, allowing the first reflective portion 310 to reflect the red light emitted by the first type of light-emitting device 210.

[0094] The thickness of a single inorganic layer in the second reflective part 320 can be calculated using a center wavelength of 490 nanometers. For example, the thickness of the first inorganic layer 301 in the second reflective part 320 can be 83.49 nanometers, and the thickness of the second inorganic layer 302 in the second reflective part 320 can be 51.82 nanometers, so that the second reflective part 310 can reflect the green or blue light emitted by the second type of light-emitting device 220.

[0095] Here, as shown in Figure 9, both the first color light reflector 321 and the second color light reflector 322 can contact one side of the drive backplate 100. Alternatively, as shown in Figure 10, both the first color light reflector 321 and the second color light reflector 322 can be disposed on the side of the first auxiliary reflector 330 away from the drive backplate 100.

[0096] For a second possible implementation, please refer to Figure 11, which is a schematic diagram of the film structure of a display panel according to another embodiment of this application. The first color light reflective part 321 and the second color light reflective part 322 in the display panel 000 are disposed in different layers.

[0097] It should be noted that the "different layer configuration" of two structures in this application refers to the fact that the film layers containing these two structures are not the same film layer. For example, the first inorganic layer 301 in the first color light reflective part 321 and the first inorganic layer 301 in the second color light reflective part 322 are not the same film layer, and the second inorganic layer 302 in the first color light reflective part 321 and the second inorganic layer 302 in the second color light reflective part 322 are not the same film layer.

[0098] It should also be noted that, as shown in Figure 11, when the first color light reflector 321 and the second color light reflector 322 in the display panel 000 are disposed in different layers, the display panel 000 may also include a second auxiliary reflector 340. The second auxiliary reflector 340 is located between the second color light reflector 322 and the drive backplate 100.

[0099] In this configuration, the second auxiliary reflector 340 in the display panel 000 can be disposed on the same layer as the first color light reflector 321 and made of the same material. That is, each first inorganic layer 301 in the second auxiliary reflector 340 and the corresponding first inorganic layer 301 in the first color light reflector 321 are the same inorganic layer, and each first inorganic layer 301 in the second auxiliary reflector 340 and the corresponding first inorganic layer 301 in the first color light reflector 321 can be formed simultaneously. Similarly, each second inorganic layer 302 in the second auxiliary reflector 340 and the corresponding second inorganic layer 302 in the first color light reflector 321 are the same inorganic layer, and each second inorganic layer 302 in the second auxiliary reflector 340 and the corresponding second inorganic layer 302 in the first color light reflector 321 can be formed simultaneously.

[0100] Thus, during the fabrication of the display panel 000, the second auxiliary reflector 340 and the first color light reflector 321 are formed simultaneously. Therefore, during the fabrication of the first color light reflector 321, the second auxiliary reflector 340, which emits the second color light and is positioned towards the driving backplate, can be preserved normally without the need for a separate patterning process to fabricate the second auxiliary reflector 340. Only the patterning process is required to fabricate the second color light reflector 322, thereby simplifying the fabrication process of the display panel 000.

[0101] In this application, when the first color light reflector 321 and the second color light reflector 322 in the display panel 000 are disposed in different layers, the thickness of the first inorganic layer 301 in the first color light reflector 321 is different from the thickness of the first inorganic layer 301 in the second color light reflector 322, and the thickness of the second inorganic layer 302 in the first color light reflector 321 is different from the thickness of the second inorganic layer 302 in the second color light reflector 322. Thus, the reflection band of the first color light reflector 321 is different from the reflection band of the second color light reflector 322.

[0102] For example, if the first inorganic layer 301 in the reflective portion 300 can be made of silicon dioxide and the second inorganic layer 302 in the reflective portion 300 can be made of niobium pentoxide, the thickness of a single inorganic layer in the first color light reflective portion 321 can be calculated using a center wavelength of 550 nanometers. For instance, the thickness of the first inorganic layer 301 in the first color light reflective portion 321 can be 93.95 nanometers, and the thickness of the second inorganic layer 302 in the first color light reflective portion 321 can be 59.23 nanometers, so that the first color light reflective portion 321 can reflect the green light emitted by the second type of light-emitting device 221 that emits green light.

[0103] The thickness of a single inorganic layer in the second-color light reflector 322 can be calculated using a center wavelength of 450 nanometers. For example, the thickness of the first inorganic layer 301 in the second-color light reflector 322 can be 76.49 nanometers, and the thickness of the second inorganic layer 302 in the second-color light reflector 322 can be 46.72 nanometers, so that the second-color light reflector 322 can reflect the blue light emitted by the second type of light-emitting device 222 that emits blue light.

[0104] Furthermore, compared to the first color light reflector 321 and the second color light reflector 322, which are disposed in the same layer and made of the same material, the first color light reflector 321 and the second color light reflector 322 are disposed in different layers. This allows the reflection band of the first color light reflector 321 to cover the wavelength range of the first color light while also having a higher reflectivity for the first color light. Similarly, the reflection band of the second color light reflector 322 to cover the wavelength range of the second color light while also having a higher reflectivity for the second color light. This effectively improves the light emission efficiency of the display panel 000, thereby increasing the brightness of the display panel 000 without increasing the current. This reduces the power consumption of the display panel 000 and extends its service life.

[0105] It should be noted that the second auxiliary reflector 340 in the display panel 000 can be used to adjust the cavity length of the microcavity structure. When the wavelength of the light emitted by the light-emitting device 221 emitting the first color light is greater than the wavelength of the light emitted by the light-emitting device 222 emitting the second color light, since the second auxiliary reflector 340 is located between the first auxiliary reflector 330 and the second color light reflector 322, the cavity length of the microcavity structure of the light-emitting device 222 emitting the second color light is smaller than the cavity length of the microcavity structure of the light-emitting device 221 emitting the first color light. As a result, the microcavity structure of the light-emitting device 222 emitting the second color light can be better matched with the shorter wavelength of the second color light, and the microcavity structure of the light-emitting device 221 emitting the first color light can be better matched with the longer wavelength of the first color light, enhancing the microcavity effect of the display panel 000 and improving the light extraction efficiency of the display panel 000.

[0106] In the embodiments of this application, in the display panel 000 shown in Figures 3, 8 to 11, since the first electrode 201 in the light-emitting device 200 is a transparent electrode, the first electrode 201 is prone to optical waveguide phenomenon, which in turn causes light loss and reduces the light output efficiency of the display panel 000.

[0107] For example, please refer to Figure 12, which is a schematic diagram of the optical path of the optical waveguide within the first electrode of the light-emitting device provided in this embodiment. After the light emitted by the light-emitting device 200 enters the first electrode 201, it easily undergoes total internal reflection repeatedly within the first electrode 201 to form an optical waveguide. It should be noted that the condition for forming an optical waveguide is that the film layer forming the optical waveguide has two optical surfaces. When light is propagated inside the film layer and the total internal reflection condition is met, total internal reflection can occur at both optical surfaces. The total internal reflection effect of the two optical surfaces confines the light within the film layer and propagates it in a certain direction.

[0108] In this application, please refer to Figure 13, which is a schematic diagram of a single reflective part provided in an embodiment of this application. Here, for easier viewing of the drawings, the first inorganic layer 301 and the second inorganic layer 302 in the reflective part 300 are not shown in the drawings. The reflective part 300 in the display panel 000 has a first light coupling structure 400 on the side opposite to the driving back plate 100, and the first light coupling structure 400 has multiple parallel first linear grooves 401.

[0109] Because the reflective part 300 has a first optical coupling structure 400 on the side facing away from the driving backplate 100, the surface characteristics of the contact surface between the first electrode 201 and the reflective layer 300 are destroyed. Light will not undergo multiple total internal reflections within the first electrode 201 to form an optical waveguide, and the propagation direction of the light will change. That is, when light passes through the first electrode 201 and irradiates the contact surface between the first electrode 201 and the reflective layer 300, the light is reflected to the surface of the first electrode 201 facing away from the driving backplate 100. The light that was originally reflected by the surface of the first electrode 201 facing away from the driving backplate 100 will not be reflected, but will exit from the surface of the first electrode 201 facing away from the driving backplate 100.

[0110] It should be noted that the first linear grooves 401 in the first light-coupled structure 400 are periodically arranged on the side of the reflective part 300 away from the driving back plate 100. Furthermore, the first light-coupled structure 400 can reflect the light emitted by the light-emitting device 200 that travels in the direction towards the driving back plate 100, allowing the reflected light to exit in the direction away from the driving back plate 100. This effectively increases the reflectivity of the reflective part 300, improves the light extraction efficiency of the display panel 000, and thus increases the brightness of the display panel 000 without increasing the current. Consequently, it reduces the power consumption of the display panel 000 and extends its lifespan.

[0111] It should also be noted that the first light coupling structure 400 in the reflective part 300 can be a grating. Gratings are based on the principle of grating diffraction, which causes light of different wavelengths to undergo corresponding regular changes in propagation direction as it passes through them, thereby reflecting light of a specific wavelength. Furthermore, the light reflected by the grating has a high degree of polarization, resulting in high light transmittance of the display panel 000.

[0112] In this case, since the wavelength of the light emitted by the first type of light-emitting device 210 is different from the wavelength of the light emitted by the second type of light-emitting device 220, in order to ensure that the first optical coupling structure 400 in the first reflective part 310 reflects the light emitted by the first type of light-emitting device 210 with a high reflectivity, and the first optical coupling structure 400 in the second reflective part 320 reflects the light emitted by the second type of light-emitting device 220 with a high reflectivity, the structural parameters of the first optical coupling structure 400 in the first reflective part 310 in the display panel 000 are different from the structural parameters of the first optical coupling structure 400 in the second reflective part 320.

[0113] Here, the structural parameters of the first optical coupling structure 400 may include at least one of the following: the center distance Λ between two adjacent first linear grooves 401, the depth H of the first linear groove 401, and the duty cycle of the first optical coupling structure 400. It should be noted that by adjusting at least one of the structural parameters of the first optical coupling structure 400, the emitted light polarization degree of the display panel 000 can be increased, resulting in higher light transmittance of the display panel 000.

[0114] Here, the center distance Λ refers to the distance between the central axes of two adjacent first linear grooves 401, and the duty cycle refers to the ratio of the width N of the first linear groove 401 to the center distance Λ between two adjacent first linear grooves 401.

[0115] Since the center distance Λ between two adjacent first linear grooves 401 is positively correlated with the wavelength of light, the reflectivity of the first light-coupled structure 400 for light of different wavelengths can be controlled by adjusting the center distance Λ between the two adjacent first linear grooves 401. This results in a higher reflectivity of the light emitted by the first type of light-emitting device 210 reflected by the first light-coupled structure 400 in the first reflective part 310, and a higher reflectivity of the light emitted by the second type of light-emitting device 220 reflected by the first light-coupled structure 400 in the second reflective part 320, thereby improving the light extraction efficiency of the display panel 000.

[0116] Furthermore, for the first optical coupling structure 400, which supports light of different wavelengths, the phase change of the reflected light from each reflective part 300 is continuous and gradual within the wavelength range of its reflected light. The phase of the reflected light does not change abruptly, avoiding spurious peaks in the spectrum of the emitted light from the display panel 000, thus resulting in better display performance. Moreover, with a continuous and gradual phase change in the reflected light, the reflected light can better match the conditions of the microcavity enhancement, effectively improving the light extraction efficiency of the display panel 000.

[0117] It should be noted that when multiple second-type light-emitting devices 220 include multiple light-emitting devices 221 for emitting first-color light and multiple light-emitting devices 222 for emitting second-color light, and the second reflective part 320 corresponding to the light-emitting device 221 emitting first-color light is the first-color light reflective part 321, and the second reflective part 320 corresponding to the light-emitting device 222 emitting second-color light is the second-color light reflective part 322, the structural parameters of the first light-coupled structure 400 in the first-color light reflective part 321 and the first light-coupled structure 400 in the second-color light reflective part 322 are different. Thus, when the wavelengths of the first-color light and the second-color light are different, the first light-coupled structure 400 in the first-color light reflective part 321 and the first light-coupled structure 400 in the second-color light reflective part 322 can reflect light within different wavelength ranges, further improving the light extraction efficiency of the display panel 000.

[0118] In summary, the display panel provided in this application includes: a driving backplate, multiple light-emitting devices, and multiple reflective portions. The multiple light-emitting devices may include multiple first-type light-emitting devices and multiple second-type light-emitting devices. The reflective portion corresponding to the first-type light-emitting devices is a first reflective portion, and the reflective portion corresponding to the second-type light-emitting devices is a second reflective portion. The first reflective portion effectively reflects light emitted from the first-type light-emitting devices that travels towards the driving backplate, while the second reflective portion effectively reflects light emitted from the second-type light-emitting devices that travels towards the driving backplate, thereby improving the light extraction efficiency of the display panel. Furthermore, within the wavelength range of the reflected light from each reflective portion, the phase change of the reflected light is continuous and gradual, without abrupt phase changes, avoiding spectral clutter in the emitted light of the display panel and resulting in a better display effect.

[0119] In this embodiment of the application, please refer to Figures 14 and 15. Figure 14 is a schematic diagram of the film layer structure of another display panel provided in another embodiment of the application, and Figure 15 is a schematic diagram of the structure of the first electrode in the light-emitting device in Figure 14. The display panel 000 includes: a driving backplate 100 and a plurality of light-emitting devices 200.

[0120] The multiple light-emitting devices 200 in the display panel 000 are distributed on one side of the driving back plate 100. The multiple light-emitting devices 200 may include multiple first-type light-emitting devices 210 and multiple second-type light-emitting devices 220.

[0121] The light-emitting device 200 in the display panel 000 may include a first electrode 201, a light-emitting layer 202, and a second electrode 203 stacked together. The first electrode 201 is electrically connected to the driving backplate 100. The first electrode 201 is a reflective electrode, and the second electrode 203 is a light-transmitting electrode. The side of the reflective electrode facing away from the driving backplate 100 has a second light coupling structure 500, and the second light coupling structure 500 has multiple parallel arranged second linear grooves 501.

[0122] It should be noted that the display panel 000 may also include a third electrode 204, and the third electrode 204 is located on the side of the first electrode 201 away from the driving backplate 100. The third electrode 204 may be made of a light-transmitting material. For example, the main material of the third electrode 204 may be indium tin oxide. The third electrode 204 made of indium tin oxide can improve the work function of the first electrode 201 with reflective properties, which is beneficial to improving the electrical performance of the first electrode 201.

[0123] It should also be noted that when the first electrode 201 does not include the second optical coupling structure 500, surface plasmon polaritons (SPPs) will be generated on the surface of the first electrode 201 facing the third electrode 204, and an optical waveguide may exist in the first electrode 201. SPPs and optical waveguides will cause light loss and reduce the light output efficiency of the display panel 000.

[0124] Here, SPP refers to the electromagnetic wave propagating along the metal surface due to the interaction between light and free electrons on the metal surface caused by the high electron content of the metal. SPP causes light energy loss. Therefore, when the light emitted by the light-emitting device 200 is transmitted to the surface of the first electrode 201 facing the third electrode 204, SPP will be present on the surface of the first electrode 201, thereby reducing the light emission efficiency of the display panel.

[0125] Furthermore, after the light emitted by the light-emitting device 200 enters the third electrode 204, it easily undergoes total internal reflection repeatedly within the third electrode 204 to form an optical waveguide. It should be noted that the condition for forming an optical waveguide is that the film layer forming the waveguide has two optical surfaces. When light propagates within this film layer and the total internal reflection condition is met, total internal reflection can occur at both optical surfaces. The total internal reflection effect of the two optical surfaces confines the light within the film layer and propagates it in a certain direction.

[0126] When the first electrode 201 includes the second optical coupling structure 500, the second optical coupling structure 500 in the first electrode 201 destroys the surface characteristics of the contact surface between the first electrode 201 and the third electrode 204. When the light emitted by the light-emitting device 200 is incident on the second optical coupling structure 500, the light will diffract due to scattering and interference. The diffracted light of a specific wavelength can interact with the SPP to couple energy, and recover the light energy lost by the interaction between the light emitted by the light-emitting device 200 and the free electrons in the metal and convert it into light energy for release.

[0127] Furthermore, since the surface characteristics of the contact surfaces of the first electrode 201 and the third electrode 204 are both destroyed, the light will not undergo multiple total internal reflections within the third electrode 204 to form an optical waveguide, and the propagation direction of the light will change. That is, when the light passes through the third electrode 204 and illuminates the contact surface of the first electrode 201 and the third electrode 204, the light is reflected to the surface of the third electrode 204 away from the driving backplate 100. The light that was originally reflected on the surface of the third electrode 204 away from the driving backplate 100 will not be reflected, but will exit from the surface of the third electrode 204 away from the driving backplate 100.

[0128] It should be noted that the second linear grooves 501 in the second photocoupler structure 500 are periodically arranged on the side of the first electrode 201 facing away from the driving backplate 100. Furthermore, the second photocoupler structure 500 can reflect the light emitted by the light-emitting device 200 that travels in the direction towards the driving backplate 100, allowing the reflected light to exit in the direction away from the driving backplate 100. This effectively increases the reflectivity of the second photocoupler structure 500, improves the light extraction efficiency of the display panel 000, and thus increases the brightness of the display panel 000 without increasing the current. Consequently, it reduces the power consumption of the display panel 000 and extends its lifespan.

[0129] It should also be noted that the second optical coupling structure 500 in the light-emitting device 200 can be a grating. Gratings are based on the principle of grating diffraction, which causes light of different wavelengths to undergo corresponding regular changes in propagation direction as it passes through them, thereby reflecting light of a specific wavelength. Furthermore, the light reflected by the grating has a high degree of polarization, resulting in high light transmittance of the display panel 000.

[0130] In this case, since the wavelength of the light emitted by the first type of light-emitting device 210 is different from the wavelength of the light emitted by the second type of light-emitting device 220, in order to make the second optical coupling structure 500 in the first type of light-emitting device 210 reflect the light emitted by the first type of light-emitting device 210 more reflectively, and the second optical coupling structure 500 in the second type of light-emitting device 220 reflect the light emitted by the second type of light-emitting device 220 more reflectively, the structural parameters of the second optical coupling structure 500 in the first type of light-emitting device 210 are different from the structural parameters of the second optical coupling structure 500 in the second type of light-emitting device 220.

[0131] Here, the structural parameters of the second optical coupling structure 500 may include at least one of the following: the center distance Λ between two adjacent second linear grooves 501, the depth H of the second linear grooves 501, and the duty cycle of the second optical coupling structure 500. It should be noted that the light polarization degree of the display panel 000 can be increased by adjusting at least one structural parameter of the first optical coupling structure 400, resulting in higher light transmittance of the display panel 000.

[0132] Since the center distance Λ between two adjacent second linear grooves 501 is positively correlated with the wavelength of light, the reflectivity of the second light-coupled structure 500 for different wavelengths of light can be controlled by adjusting the center distance Λ between the two adjacent second linear grooves 501. This results in the second light-coupled structure 500 in the first type of light-emitting device 210 having a higher reflectivity for the light emitted by the first type of light-emitting device 210, and the second light-coupled structure 500 in the second type of light-emitting device 220 having a higher reflectivity for the light emitted by the second type of light-emitting device 220, thereby improving the light extraction efficiency of the display panel 000.

[0133] Furthermore, for the second optical coupling structure 500 for light of different wavelengths, within the wavelength range of its reflected light, the phase change of the reflected light reflected by each first electrode 201 is continuous and gradual, and the phase of the reflected light will not change abruptly, thus avoiding the appearance of spurious peaks in the spectrum of the emitted light of the display panel 000, resulting in a better display effect of the display panel 000.

[0134] It should be noted that when multiple second-type light-emitting devices 220 include multiple light-emitting devices 221 for emitting first-color light and multiple light-emitting devices 222 for emitting second-color light, the structural parameters of the second optical coupling structure 500 in the light-emitting device 221 emitting the first-color light and the second optical coupling structure 500 in the light-emitting device 222 emitting the second-color light are different. Thus, when the wavelengths of the first-color light and the second-color light are different, the second optical coupling structure 500 in the light-emitting device 221 emitting the first-color light and the second optical coupling structure 500 in the light-emitting device 222 emitting the second-color light can reflect light within different wavelength ranges, further improving the light extraction efficiency of the display panel 000.

[0135] In summary, the display panel provided in this application embodiment includes: a driving backplate and multiple light-emitting devices. The multiple light-emitting devices may include multiple first-type light-emitting devices and multiple second-type light-emitting devices. Each light-emitting device may include a first electrode, a light-emitting layer, and a second electrode stacked together. The side of the first electrode facing away from the driving backplate has a second light-coupled structure, and the second light-coupled structure has multiple parallel-arranged second linear grooves. The second light-coupled structure can reduce the SPP generated in the first electrode and can improve the reflectivity of the first electrode, thereby increasing the light extraction efficiency of the display panel. Furthermore, the wavelengths of light emitted by the first type of light-emitting device and the multiple second type of light-emitting devices are different. The structural parameters of the second optical coupling structure in the first type of light-emitting device and the second optical coupling structure in the second type of light-emitting device are different. This results in the second optical coupling structure in the first type of light-emitting device having a higher reflectivity for the light emitted by the first type of light-emitting device, and the second optical coupling structure in the second type of light-emitting device having a higher reflectivity for the light emitted by the second type of light-emitting device. Moreover, for the second optical coupling structure for different wavelengths of light, the phase change of the reflected light reflected by each first electrode is continuous and smooth within the wavelength range of the reflected light. The phase of the reflected light will not change abruptly, thus avoiding the appearance of spurious peaks in the spectrum of the emitted light of the display panel, resulting in a better display effect of the display panel.

[0136] This application also provides a display device, which may include a display panel and a driver chip. The display panel is the aforementioned display panel, and the driver chip is used to apply a driving signal to the display panel. The display device can be any product or component with display functionality, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0137] It should be noted that the dimensions of layers and regions may be exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be intermediate layers. Additionally, it is understood that when an element or layer is referred to as being "below" another element or layer, it can be directly below the other element, or there may be more than one intermediate layer or element. Furthermore, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0138] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0139] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A display panel, characterized in that, include: Drive backplate, multiple light-emitting devices and multiple reflectors; The plurality of light-emitting devices are distributed on one side of the driving backplate and electrically connected to the driving backplate. The plurality of light-emitting devices include a plurality of first-type light-emitting devices and a plurality of second-type light-emitting devices. Each of the multiple reflective portions corresponds one-to-one with a multiple of the multiple light-emitting devices. The reflective portion is located between the corresponding light-emitting device and the driving backplate. The reflective portion includes multiple layers of first inorganic layer and multiple layers of second inorganic layer stacked together. The multiple layers of first inorganic layer and multiple layers of second inorganic layer are arranged alternately. Wherein, the reflective part corresponding to the first type of light-emitting device is the first reflective part, and the reflective part corresponding to the second type of light-emitting device is the second reflective part; the thickness of the first inorganic layer in the first reflective part is different from the thickness of the first inorganic layer in the second reflective part, and the thickness of the second inorganic layer in the first reflective part is different from the thickness of the second inorganic layer in the second reflective part.

2. The display panel according to claim 1, characterized in that, The first reflective part contacts the side of the driving back plate facing the first type of light-emitting device, and the second reflective part contacts the side of the driving back plate facing the second type of light-emitting device.

3. The display panel according to claim 1, characterized in that, The first reflective part contacts the side of the driving back plate facing the first type of light-emitting device; the display panel further includes: a first auxiliary reflective part, the first auxiliary reflective part being located between the second reflective part and the driving back plate, and the first auxiliary reflective part contacting the side of the driving back plate facing the second type of light-emitting device.

4. The display panel according to claim 3, characterized in that, The first auxiliary reflective part is disposed in the same layer as the first reflective part and is made of the same material.

5. The display panel according to any one of claims 1-4, characterized in that, The plurality of second-type light-emitting devices include: a plurality of light-emitting devices for emitting first-color light, and a plurality of light-emitting devices for emitting second-color light; Wherein, the second reflective part corresponding to the light-emitting device for emitting the first color light is the first color light reflective part, and the second reflective part corresponding to the light-emitting device for emitting the second color light is the second color light reflective part; The first color light reflective part and the second color light reflective part are disposed in the same layer and are made of the same material; or, the first color light reflective part and the second color light reflective part are disposed in different layers.

6. The display panel according to claim 5, characterized in that, When the first color light reflector and the second color light reflector are disposed in different layers, the display panel further includes: a second auxiliary reflector, which is located between the second color light reflector and the driving back plate; The second auxiliary reflective part is disposed in the same layer as the first color light reflective part and is made of the same material.

7. The display panel according to claim 6, characterized in that, The thickness of the first inorganic layer in the first color light reflective part is different from the thickness of the first inorganic layer in the second color light reflective part, and the thickness of the second inorganic layer in the first color light reflective part is different from the thickness of the second inorganic layer in the second color light reflective part.

8. The display panel according to claim 6 or 7, characterized in that, The first type of light-emitting device is used to emit red light, the first color light is green light, and the second color light is blue light.

9. The display panel according to any one of claims 1-4 and 6-7, characterized in that, The reflective part has a first light coupling structure on the side away from the drive back plate, and the first light coupling structure has multiple parallel first linear grooves. The structural parameters of the first light-coupled structure in the first reflective part are different from those of the first light-coupled structure in the second reflective part.

10. The display panel according to claim 9, characterized in that, The structural parameters of the first optical coupling structure include at least one of the following: the center distance between two adjacent first linear grooves, the depth of the first linear groove, and the duty cycle of the first optical coupling structure.

11. The display panel according to any one of claims 1-4, 6-7, and 10, characterized in that, The light-emitting device includes a first electrode, a light-emitting layer, and a second electrode stacked together; the first electrode is electrically connected to the driving backplate. The first electrode is a light-transmitting electrode, and the second electrode is a semi-transmitting and semi-reflective electrode.

12. The display panel according to claim 11, characterized in that, The light-emitting layer includes at least two sub-light-emitting layers and a charge-generating layer located between two adjacent sub-light-emitting layers; In the same light-emitting device, the light emitted by each of the sub-light-emitting layers is of the same color.

13. The display panel according to claim 12, characterized in that, The sub-light-emitting layer includes a hole transport layer, and the sum of the thicknesses of at least two hole transport layers in the light-emitting layer is less than 100 nanometers.

14. A display panel, characterized in that, include: Driven backplane and multiple light-emitting devices; The plurality of light-emitting devices are distributed on one side of the driving backplate, and the plurality of light-emitting devices include a plurality of first-type light-emitting devices and a plurality of second-type light-emitting devices; The light-emitting device includes a first electrode, a light-emitting layer, and a second electrode stacked together; the first electrode is electrically connected to the driving backplate. The first electrode is a reflective electrode, and the second electrode is a light-transmitting electrode; and the side of the reflective electrode facing away from the driving back plate has a second light coupling structure, and the second light coupling structure has multiple parallel arranged second linear grooves; The structural parameters of the second optical coupling structure in the first type of light-emitting device are different from those of the second optical coupling structure in the second type of light-emitting device.

15. A display device, characterized in that, include: The display panel is the display panel according to any one of claims 1 to 14, and the driving chip is used to apply a driving signal to the display panel.

Images