Display panel, display device and driving method of display panel

Abstract

The application discloses a display panel, a display device and a driving method of the display panel. The display panel comprises a substrate, a light-emitting structure layer and an adjustable decoration layer. The light-emitting structure layer is arranged on one side of the substrate. The light-emitting structure layer comprises a light-emitting unit. The light-emitting unit comprises a first light-emitting electrode, a light-emitting layer and a second light-emitting electrode. The first light-emitting electrode, the light-emitting layer and the second light-emitting electrode are sequentially and laminatedly arranged in a direction away from the substrate. The adjustable decoration layer is arranged on a side of the light-emitting structure layer away from the substrate. The adjustable decoration layer comprises a plurality of color adjusting units. The plurality of color adjusting units comprise a first color adjusting unit. The first color adjusting unit comprises a first color adjusting electrode, a first color adjusting part and a second color adjusting electrode, which are sequentially and laminatedly arranged in a direction away from the substrate. The first color adjusting part is not overlapped with the light-emitting layer in a normal projection on the substrate. The first color adjusting electrode is arranged in the same layer as the first light-emitting electrode. The display is not easy to age in a fixed position, and the use performance of the display panel is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display panel, a display device, and a driving method for the display panel. Background Technology

[0002] Organic light-emitting diodes (OLEDs) and flat panel displays based on light-emitting diodes (LEDs) are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, and wide range of applications, becoming the mainstream of display devices.

[0003] However, the performance of current OLED display products needs to be improved. Summary of the Invention

[0004] This application provides a display panel, a flexible display module, and a display device, aiming to improve the performance of the display panel.

[0005] The first aspect of this application provides a display panel, which includes a substrate, a light-emitting structure layer, and an adjustable decorative layer. The light-emitting structure layer is disposed on one side of the substrate and includes a light-emitting unit. The light-emitting unit includes a first light-emitting electrode, a light-emitting layer, and a second light-emitting electrode. The first light-emitting electrode, the light-emitting layer, and the second light-emitting electrode are sequentially stacked in a direction away from the substrate. The adjustable decorative layer is disposed on the side of the light-emitting structure layer away from the substrate and includes a plurality of color-tuning units. The plurality of color-tuning units include a first color-tuning unit. The first color-tuning unit includes a first color-tuning electrode, a first color-tuning portion, and a second color-tuning electrode sequentially stacked in a direction away from the substrate. The orthographic projection of the first color-tuning portion on the substrate does not coincide with the orthographic projection of the light-emitting layer on the substrate. The first color-tuning electrode and the first light-emitting electrode are disposed in the same layer.

[0006] According to an embodiment of the first aspect of this application, the first color-matching unit further includes an auxiliary electrode, which is connected to the first color-matching electrode and extends toward the first color-matching section.

[0007] According to any of the foregoing embodiments of the first aspect of this application, the second color-tuning electrode is formed with a first opening, and the orthographic projection of the first opening on the substrate at least partially overlaps with the orthographic projection of the light-emitting layer on the substrate.

[0008] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes a light filter layer, the light filter layer includes light filter portions, and the orthographic projections of each light filter portion on the substrate and the orthographic projections of each light-emitting layer on the substrate at least partially overlap.

[0009] According to any of the foregoing embodiments of the first aspect of this application, the filter layer includes at least two filter portions of different colors, and the filter portions of different colors are disposed in a one-to-one correspondence with the light-emitting layers of different colors.

[0010] According to any of the foregoing embodiments of the first aspect of this application, the filter section and the first color-tuning section are at least partially disposed in the same layer.

[0011] According to any of the foregoing embodiments of the first aspect of this application, the plurality of color-tuning units further includes a second color-tuning unit. The second color-tuning unit includes a third color-tuning electrode, a second color-tuning portion, and a fourth color-tuning electrode that are sequentially stacked along a direction away from the substrate. The orthographic projection of the second color-tuning portion on the substrate and the orthographic projection of the light-emitting layer on the substrate at least partially overlap.

[0012] According to any of the foregoing embodiments of the first aspect of this application, the second color-tuning section includes a first particle, a transparent particle, and a black particle, wherein the color of the first particle is the same as the light-emitting color of the light-emitting layer corresponding to the second color-tuning section.

[0013] According to any of the foregoing embodiments of the first aspect of this application, the second color-matching section is disposed on the same layer as the first color-matching section.

[0014] According to any of the foregoing embodiments of the first aspect of this application, the fourth color-tuning electrode and the second color-tuning electrode are an integral structure.

[0015] According to any of the foregoing embodiments of the first aspect of this application, the second color-tuning electrode is formed with a first opening, the orthographic projection of the first opening on the substrate at least partially overlaps with the orthographic projection of the light-emitting layer on the substrate, and the fourth color-tuning electrode is at least partially disposed in the first opening.

[0016] According to any of the foregoing embodiments of the first aspect of this application, the second light-emitting electrode is reused as the third color-tuning electrode.

[0017] According to any of the foregoing embodiments of the first aspect of this application, the second color-tuning electrode and the fourth color-tuning electrode are an integral structure, and / or the second light-emitting electrode is reused as the third color-tuning electrode.

[0018] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes a light-shielding layer located on the side of the light-emitting structure layer away from the substrate, wherein at least part of the orthogonal projection of the light-emitting layer onto the substrate is located outside the orthogonal projection of the light-shielding layer onto the substrate, and the first color-tuning portion is disposed on the side of the light-shielding layer away from the substrate.

[0019] According to any of the foregoing embodiments of the first aspect of this application, the material of the light-shielding layer includes a black matrix.

[0020] According to any of the foregoing embodiments of the first aspect of this application, the light-shielding layer has a second opening, and the first color-adjusting portion is at least partially disposed within the second opening.

[0021] According to any of the foregoing embodiments of the first aspect of this application, the material of the light-shielding layer includes an organic adhesive.

[0022] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes an encapsulation layer disposed on the side of the second light-emitting electrode away from the substrate.

[0023] According to any of the foregoing embodiments of the first aspect of this application, the adjustable decorative layer includes a base layer, on which a plurality of sealed cavities are provided. The sealed cavities include a liquid medium and charged particles disposed in the liquid medium, the charged particles carrying positive or negative charges.

[0024] According to any of the foregoing embodiments of the first aspect of this application, the charged particles include a plurality of colored particles of different colors.

[0025] According to any of the foregoing embodiments of the first aspect of this application, the first color-mixing section includes a plurality of capsule-shaped structures, each capsule-shaped structure including a sealed cavity.

[0026] According to any of the foregoing embodiments of the first aspect of this application, the colored particles include ink particles.

[0027] According to any of the foregoing embodiments of the first aspect of this application, the colored particles include at least one of cyan particles, magenta particles, yellow particles, and black particles.

[0028] According to any of the foregoing embodiments of the first aspect of this application, different types of colored particles are disposed in different sealed cavities.

[0029] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes a protective structure disposed on the side of the adjustable decorative layer facing away from the substrate.

[0030] According to any of the foregoing embodiments of the first aspect of this application, the protective structure has a tactile texture structure on the side facing away from the substrate.

[0031] According to any of the foregoing embodiments of the first aspect of this application, the material of the tactile texture structure includes at least one of polyterephthalate, acrylonitrile-butadiene-styrene copolymer, polycarbonate, polymethyl methacrylate, and silicone.

[0032] According to any of the foregoing embodiments of the first aspect of this application, the substrate includes a first driving circuit and a second driving circuit, the first driving circuit being connected to a first light-emitting electrode and the second driving circuit being connected to a first color-tuning electrode.

[0033] A second aspect of this application provides a display device that includes a display panel according to any of the embodiments of the first aspect described above.

[0034] A third aspect of this application provides a driving method for driving a display panel as described in any of the embodiments of the first aspect above. The driving method includes:

[0035] When the light-emitting unit corresponding to the light-emitting structure layer is in display mode, power supply to the color-tuning electrode is stopped after the adjustable decorative layer is driven to black by controlling the color-tuning electrode; or...

[0036] Corresponding to the off state of each light-emitting unit in the light-emitting structure layer, the power supply to the color-tuning electrode is stopped after the adjustable decorative layer is driven to display a static pattern by controlling the color-tuning electrode, or the color-tuning electrode is controlled to drive the adjustable decorative layer to change the pattern at a low frequency; or...

[0037] Corresponding to the off state of each light-emitting unit in the light-emitting structure layer, the color-tuning electrode is controlled to drive the adjustable decorative layer to display a low-frequency changing pattern.

[0038] According to the embodiments of this application, the display panel includes a substrate, a light-emitting structure layer, and an adjustable decorative layer. The orthographic projection of the first color-tuning part in the adjustable decorative layer on the substrate does not coincide with the orthographic projection of the light-emitting layer on the substrate. That is, the first color-tuning part can correspond to the non-display area of ​​the display panel. Driven by the electric field formed between the first color-tuning electrode and the second color-tuning electrode, the color and pattern displayed by the first color-tuning part can change dynamically. That is, the color and pattern of the first color-tuning part can be selected according to the external environment, realizing the integration of the display panel and the environment. It is suitable for home, vehicle and other environments. The display is not prone to aging in a fixed position, improving the user experience and improving the performance of the display panel.

[0039] Meanwhile, the first color-tuning electrode and the first light-emitting electrode are arranged in the same layer, that is, the first color-tuning electrode and the first light-emitting electrode are staggered but both are arranged in the same film layer structure. The first color-tuning electrode and the first light-emitting electrode are not connected but share the same film layer, which can be prepared at the same time, simplifying the preparation process and improving efficiency. Attached Figure Description

[0040] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features, and the drawings are not drawn to scale.

[0041] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0042] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0043] Figure 3 One embodiment provided Figure 2 Schematic diagram of the cross-sectional structure at point BB;

[0044] Figure 4 This is provided in another embodiment. Figure 2 Schematic diagram of the cross-sectional structure at point BB;

[0045] Figure 5 This is yet another embodiment provided. Figure 2 A schematic diagram of the cross-sectional structure at point BB.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. Substrate;

[0048] 21. First driving circuit; 22. Second driving circuit;

[0049] 3. Light-emitting structural layer; 31. First light-emitting electrode; 32. Light-emitting layer; 33. Second light-emitting electrode;

[0050] 4. Adjustable decorative layer; 40. Base layer; 41. First color mixing section; 42. Second color mixing section;

[0051] 51. First color-correcting electrode; 511. Auxiliary electrode; 52. Second color-correcting electrode; 521. First opening;

[0052] 61. Third color-correcting electrode; 62. Fourth color-correcting electrode;

[0053] 71. Filter layer; 711. Filter section;

[0054] 72. Encapsulation layer;

[0055] 8. Light-blocking layer; 81. Second opening;

[0056] 91. Protective structure; 92. Tactile texture structure; 921. Raised structure. Detailed Implementation

[0057] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0059] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0060] Organic light-emitting diode (OLED) display modules have advantages such as high color gamut, flexibility, and fast response speed, and their market share is increasing year by year. Users also have increasingly higher requirements for the display effect of OLED panels.

[0061] In current environmental integrated display modules, the surface texture pattern of the display module is fixed, and the pattern of the integrated environment cannot be changed. High-brightness light sources penetrate the texture pattern surface, and the surface transmittance is 20% to 55%, which can easily cause poor display effect of the display module during the display period. The fixed display position is prone to aging, affecting the service life of the display module.

[0062] To address the aforementioned issues, this application provides a display panel, a display device, and a driving method for the display panel. The following description, in conjunction with the accompanying drawings, will illustrate various embodiments of the display panel, display device, and driving method for the display panel.

[0063] Please refer to the following: Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application.

[0064] This application provides a display panel, which may be an organic light-emitting diode (OLED) display panel.

[0065] like Figures 1 to 3 As shown, a first aspect of this application provides a display panel, which includes a substrate 1, a light-emitting structure layer 3, and an adjustable decorative layer 4. The light-emitting structure layer 3 is disposed on one side of the substrate 1 and includes a light-emitting unit. The light-emitting unit includes a first light-emitting electrode 31, a light-emitting layer 32, and a second light-emitting electrode 33. The first light-emitting electrode 31, the light-emitting layer 32, and the second light-emitting electrode 33 are stacked sequentially in a direction away from the substrate 1. The adjustable decorative layer 4 is disposed on the side of the light-emitting structure layer 3 away from the substrate 1 and includes a plurality of color-tuning units. The plurality of color-tuning units include a first color-tuning unit. The first color-tuning unit includes a first color-tuning electrode 51, a first color-tuning portion 41, and a second color-tuning electrode 52 stacked sequentially in a direction away from the substrate 1. The orthographic projection of the first color-tuning portion 41 on the substrate 1 does not coincide with the orthographic projection of the light-emitting layer 32 on the substrate 1. The first color-tuning electrode 51 and the first light-emitting electrode 31 are disposed on the same layer.

[0066] The display panel provided in this application embodiment includes a substrate 1, a light-emitting structure layer 3, and an adjustable decorative layer 4. The orthographic projection of the first color-tuning part 41 in the adjustable decorative layer 4 onto the substrate 1 and the orthographic projection of the light-emitting layer 32 onto the substrate 1 do not coincide. That is, the first color-tuning part 41 can correspond to the non-display area of ​​the display panel. Driven by the electric field formed between the first color-tuning electrode 51 and the second color-tuning electrode 52, the color and pattern displayed by the first color-tuning part 41 can change dynamically. That is, the color and pattern of the first color-tuning part 41 can be selected according to the external environment, realizing the integration of the display panel and the environment. It is suitable for home, vehicle and other environments. The display is not prone to aging in a fixed position, improving the user experience and improving the performance of the display panel.

[0067] In this embodiment, the first color-tuning electrode 51 and the first light-emitting electrode 31 are disposed in the same layer, that is, the first color-tuning electrode 51 and the first light-emitting electrode 31 are staggered but both are disposed in the same film layer structure. The first color-tuning electrode 51 and the first light-emitting electrode 31 are not connected but share the same film layer, which can be prepared at the same time, simplifying the preparation process and improving efficiency.

[0068] Optional, such as Figure 3 As shown, the first color adjustment unit also includes an auxiliary electrode 511, which is connected to the first color adjustment electrode 51 and extends toward the first color adjustment section 41. In order to make the potential of the first color adjustment electrode 51 more quickly control the first color adjustment section 41, an auxiliary electrode 511 facing the first color adjustment section 41 can also be provided on the first color adjustment electrode 51 to achieve more precise and faster control of the first color adjustment section 41.

[0069] It should be noted that since the orthographic projection of the first color-tuning part 41 on the substrate 1 and the orthographic projection of the light-emitting layer 32 on the substrate 1 do not overlap, the first color-tuning part 41 will not completely block the light-emitting layer 32, reducing the impact on the light-emitting effect of the light-emitting layer 32. Furthermore, since the adjustable decorative layer 4 is located above the light-emitting functional layer, it can serve as a visible film layer. When the color or pattern of the adjustable decorative layer 4 changes, the user can directly observe it. Therefore, the color and pattern of the adjustable decorative layer 4 can be adjusted according to the environment of the display panel by adjusting the magnitude of the electric field voltage between the first color-tuning electrode 51 and the second color-tuning electrode 52, thereby achieving integrated fusion between the display panel and the environment. Optionally, the orthographic projection of the first color-tuning part 41 on the substrate 1 is located outside the orthographic projection of the light-emitting layer 32 on the substrate 1, in an area where their orthographic projections on the substrate do not overlap, further reducing the impact of the first color-tuning part 41 on the light-emitting effect of the light-emitting layer 32.

[0070] In this embodiment, the first color adjustment unit 41 can be driven by the electric field and voltage signal formed by the color adjustment electrode, so as to realize the change of the display pattern and color of the first color adjustment unit 41, so that it can adaptively adjust the display mode according to the change of environment or usage status. The display panel has the advantages of good display effect and long service life.

[0071] Optionally, the light-emitting unit may also include one or more of the following: an electron injection layer, an electron transport layer, a hole blocking layer, an electron blocking layer, a hole transport layer, and a hole injection layer. The specific selection depends on the specific type of the light-emitting structure layer 3 and is not particularly limited. The electron injection layer, electron transport layer, and hole blocking layer may be disposed between the second light-emitting electrode 33 and the light-emitting layer 32. The electron blocking layer, hole transport layer, and hole injection layer may be disposed between the first light-emitting electrode 31 and the light-emitting layer 32.

[0072] The material of the first light-emitting electrode 31 is generally a material with a high work function to improve hole injection efficiency. It can be gold (Au), platinum (Pt), titanium (Ti), silver (Ag), indium tin oxide (ITO), zinc tin oxide (IZO), or a transparent conductive polymer (such as polyaniline). For example, the first light-emitting electrode 31 can be made of ITO-Ag-ITO composite material.

[0073] The material of the second light-emitting electrode 33 can be one of the following metals: silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca), or indium (In), or it can be an alloy of the aforementioned metals, such as magnesium-silver alloy (Mg / Ag) or lithium-aluminum alloy (Li / Al).

[0074] In some optional embodiments, the adjustable decorative layer 4 includes a base layer 40, on which a plurality of sealed cavities are provided. The sealed cavities include a liquid medium and charged particles disposed in the liquid medium, the charged particles carrying positive or negative charges.

[0075] Optionally, the charged particles include multiple colored particles of different colors. Considering that the colored particles need to be in a liquid medium to move in an electric field (i.e., electrophoresis), similar to a liquid crystal layer structure, multiple sealed cavities can be provided in the adjustable decorative layer 4 to contain the liquid medium. The colored particles are suspended in a sealed cavity filled with a liquid medium containing both positively and negatively charged colored particles. In the initial state without an applied electric field, these colored particles are randomly distributed, making the adjustable decorative layer 4 black or a neutral color.

[0076] Under the influence of an electric field, some colored particles can undergo electrophoresis along the direction of the electric field to accumulate on the surface of the adjustable decorative layer 4 away from the substrate 1. By adjusting the charge properties of the colored particles and their specific colors, the adjustable decorative layer 4 can display the desired color pattern.

[0077] Optionally, the first color adjustment section 41 includes multiple capsule-shaped structures, each including a sealed cavity. A capsule-shaped structure can be set in a corresponding area between adjacent light-emitting layers 32 for adjusting the color pattern of this part of the display panel.

[0078] Optionally, the colored particles include ink particles.

[0079] Optionally, the colored particles include at least one of cyan, magenta, yellow, and black particles. The desired color pattern can be formed using the CMYK color model. Specifically, the CMYK color model, in stark contrast to the RGB model, is a color system based on the subtractive mixing principle of pigments. CMYK stands for Cyan, Magenta, Yellow, and Black.

[0080] In these alternative embodiments, different colors are produced by utilizing the absorption, transmission, and reflection of light by ink particles. The particles first absorb a portion of the light while reflecting the portion they cannot absorb. These reflected colored lights then mix and finally enter the human eye as mixed light, forming the corresponding color in the brain. The three primary colors of pigments are subtractive primary colors; after mixing, the energy is subtracted, resulting in a darker color than the original. Theoretically, mixing equal amounts of the three primary colors produces black. However, since the purity of the ink particles themselves cannot reach the theoretical limit, the color produced by mixing equal amounts of CMY is generally dark gray. Therefore, an independent black (K) is added to form the CMYK system.

[0081] When different colored particles mix, they actually subtract (or absorb) certain color wavelengths from white light. For example, cyan particles absorb red light, magenta particles absorb green light, and yellow particles absorb blue light.

[0082] Optionally, different colored particles can be placed in different sealed cavities.

[0083] Adjustable decorative layer 4 can also contain intermediate color particles based on the CMYK system, such as those doped with original color ions.

[0084] It should be noted that the first color-tuning unit may also be a composite structure comprising a first color-tuning electrode 51, a first color-tuning part 41, an electrolyte layer, an ion storage layer, and a second color-tuning electrode 52 arranged sequentially along the direction away from the substrate 1. The materials of the first color-tuning electrode 51 and the second color-tuning electrode 52 may be indium tin oxide (ITO), the material of the first color-tuning part 41 may be tungsten trioxide (WO3), the material of the electrolyte layer may be lithium niobate or lithium tantalate, and the material of the ion storage layer may be nickel oxide (NiO).

[0085] WO3, as an electrochromic film layer, possesses a wide optical modulation range, significant color contrast, high coloring efficiency, and excellent cycle performance. LiTaO3, as an ion-conducting layer or electrolyte layer, serves as the ion supply layer for electrochromic devices. During device coloring, ions in the electrolyte carry charges and enter the functional layer to react; during fading, the ions return to the electrolyte. NiO is a typical anodic coloring material, capable of transitioning between dark brown and transparent colors. Due to its considerable coloring / bleaching range, good cycle life, and large Li+ ion storage capacity, it is considered an excellent anodic coloring material and suitable for assembly with tungsten oxide thin films into complementary electrochromic devices.

[0086] Based on the Fabry-Perot (FP) resonance mechanism and surface plasmon resonance effect, custom structural colors such as red-green-blue (RGB) and yellow-magenta-cyan-black (CMYK) can be created. The three primary colors or three primary color combination theorem can be used to achieve the modulation and display of arbitrary colors. It has the characteristics of being insensitive to the incident light angle and having stable physicochemical properties. The structural color layer provides the basic color for the structure. By adjusting the voltage of the electrochromic device, the brightness of each unit can be adjusted, thereby achieving the control of color.

[0087] Optionally, the first color-tuning section 41 in this embodiment has four display states. The first state is the initial state, in which the particles are randomly distributed, making the CMYK capsule / film layer black or neutral. The second state requires the light-emitting layer 32 of the display panel to present the best display effect, which requires the first color-tuning section 41 to present the least noticeable effect, i.e., the lowest reflectivity. An electrical signal is sent to the color-tuning electrode through the control chip, and under the action of electrophoresis, the K color particles begin to move and gather on the side of the first color-tuning section 41 away from the substrate 1, making the first color-tuning section 41 appear black. The third state requires... The adjustable decorative layer 4 presents a high-quality display effect in static scenes. By precisely controlling the electrical signal, the first color adjustment part 41 at different positions can display various colors. When the electrical signal is turned off, the pattern is stable and does not consume power. It is suitable for static scenes and can achieve integrated integration with the environment, such as home and car environments. In the fourth state, the adjustable decorative layer 4 needs to present a high-quality display effect in dynamic scenes. By precisely controlling the electrical signal, the first color adjustment part 41 at different positions can display various colors. After changing the scene, the display of the first color adjustment part 41 is changed by automatic refresh, dynamically achieving integrated integration with the environment.

[0088] Optional, refer to Figure 3 The second color-tuning electrode 52 has a first opening 521. The orthographic projection of the first opening 521 on the substrate 1 at least partially overlaps with the orthographic projection of the light-emitting layer 32 on the substrate 1. The positions of each first opening 521 can be directly opposite each light-emitting layer 32. An electric field is formed between the second color-tuning electrode 52 and the corresponding first color-tuning electrode 51 below it. In the top view, the second color-tuning electrodes 52 are distributed in a mesh pattern above the first color-tuning section 41, and the edges of the second color-tuning electrodes 52 can be connected to external voltage signal lines.

[0089] In some alternative embodiments, refer to Figure 3 The display panel also includes a light filter layer 71, which includes filter sections 711. The orthographic projections of each filter section 711 on the substrate 1 and the orthographic projections of each light-emitting layer 32 on the substrate 1 at least partially overlap. The at least partial overlap means that the orthographic projection of the filter section 711 on the substrate 1 can partially cover the orthographic projection of the light-emitting layer 32 on the substrate 1, or it can mean that the orthographic projection of the filter section 711 on the substrate 1 can completely cover the orthographic projection of the light-emitting layer 32 on the substrate 1, ensuring that the light emitted from the light-emitting layer 32 can pass through the filter section 711. The filter section 711 corresponds to each light-emitting layer 32 and has a color filtering function to achieve a good display effect for the light-emitting layer 32.

[0090] Optionally, the filter layer 71 includes at least two different colored filter sections 711, with each colored filter section 711 corresponding to a different colored light-emitting layer 32. Each light-emitting layer 32 is provided with a filter section 711 for filtering different colors of light, thereby enhancing the light emitted by the corresponding color from the light-emitting layer 32 and improving the display effect of the display panel.

[0091] Optional, such as Figure 3 As shown, the light filter 711 and the first color tone section 41 are at least partially disposed on the same layer. The disposal on the same layer only indicates the relative positional relationship between the light filter structure and the first color tone section 41, and their layout within the display panel to make the structure compact, and does not limit the manufacturing process or materials of the light filter 711 and the first color tone section 41.

[0092] In some alternative embodiments, refer to Figure 4 and Figure 5 The multiple color adjustment units also include a second color adjustment unit. The second color adjustment unit includes a third color adjustment electrode 61, a second color adjustment part 42 and a fourth color adjustment electrode 62 stacked sequentially along the direction away from the substrate 1. The orthographic projection of the second color adjustment part 42 on the substrate 1 and the orthographic projection of the light-emitting layer 32 on the substrate 1 at least partially overlap.

[0093] In these embodiments, the color of the colored particles in the second color-tuning section 42 can be adjusted so that the light emitted from the light-emitting layer 32 of the corresponding color can be emitted from the second color-tuning section 42, thereby reducing reflected light and improving the effect of a uniform black.

[0094] Optionally, the second color adjustment unit 42 includes first particles, transparent particles, and black particles. The color of the first particles is the same as the light emission color of the corresponding light-emitting layer 32 of the second color adjustment unit 42. The second color adjustment unit 42 does not need to change the color pattern according to the environment and can play a similar role to the filter unit 711. By setting the first particles with the same light emission color as the corresponding light-emitting layer 32, the light of the corresponding color can be emitted from the second color adjustment unit 42, while the black particles can be used to improve the overall black effect when the display panel is off.

[0095] Optionally, the second color-tuning section 42 is disposed on the same layer as the first color-tuning section 41. In this embodiment, the second color-tuning section 42 replaces the filter section 711 and is disposed at the position of the filter section 711, in contrast to the filter section 711.

[0096] Optionally, the opaque particles in the adjustable decorative layer 4 can be colored at individual points, that is, the opaque particles are not set to overlap, so as to avoid wasting materials, while the transparent particles can be colored in layers. The opaque particles can be understood as particles with a light transmittance of less than 10%. The specific light transmittance can be set by adjusting the material of the particles in the adjustable decorative layer 4.

[0097] Optionally, depending on the requirements, the position of colored particles and other particles in the adjustable decorative layer 4, as well as the density ratio of different colors of particles, can be adjusted to obtain the desired color and pattern.

[0098] In some alternative embodiments, refer to Figure 4 and Figure 5 The fourth color-tuning electrode 62 and the second color-tuning electrode 52 are integrated into one structure.

[0099] In these embodiments, the fourth color-correcting electrode 62 and the second color-correcting electrode 52 are integrally structured, meaning they are located in the same layer. They can be shared or insulated from each other. If it is necessary to separate the fourth color-correcting electrode 62 and the second color-correcting electrode 52, an insulating layer can be provided between them. An electric field can also be formed between the third color-correcting electrode 61 and the fourth color-correcting electrode 62, thereby driving the second color-correcting section 42 and causing the particles within the second color-correcting section 42 to undergo electrophoresis.

[0100] Optional, such as Figure 4 As shown, the second color-tuning electrode 52 has a first opening 521. The orthographic projection of the first opening 521 on the substrate 1 at least partially overlaps with the orthographic projection of the light-emitting layer 32 on the substrate 1. The fourth color-tuning electrode 62 is at least partially disposed within the first opening 521. In this embodiment, the fourth color-tuning electrode 62 can also have a mesh structure and be staggered with the second color-tuning electrode 52. The fourth color-tuning electrode 62 and the second color-tuning electrode 52 are on the same layer and share the same film layer, allowing for simultaneous design and fabrication of the process, making the structure of the display panel more compact. Optionally, the fourth color-tuning electrodes 62 corresponding one-to-one with each of the second color-tuning sections 42 can be interconnected by a bridge connection.

[0101] Optional, such as Figure 4 As shown, the second light-emitting electrode 33 is reused as the third color-tuning electrode 61. Taking the second light-emitting electrode 33 as the cathode as an example, the third color-tuning electrode 61 is at a lower potential relative to the fourth color-tuning electrode 62. That is, the third color-tuning electrode 61 is also set as the negative electrode of the second color-tuning part 42, and the fourth color-tuning electrode 62 is set as the positive electrode of the second color-tuning part 42. In this case, there is no need to set up additional electrodes, and the second light-emitting electrode 33 can simultaneously serve as the third color-tuning electrode 61, simplifying the structure and manufacturing process.

[0102] In some alternative embodiments, refer to Figure 5 The second color-tuning electrode 52 and the fourth color-tuning electrode 62 are integrated into one structure. Optionally, the second light-emitting electrode 33 can be reused as the third color-tuning electrode 61.

[0103] In these embodiments, taking the second light-emitting electrode 33 as the cathode as an example, the first color-tuning electrode 51 is the positive electrode of the first color-tuning section 41, and the second color-tuning electrode 52 is at a low potential relative to the first color-tuning electrode 51, serving as the negative electrode of the first color-tuning section 41. At the same time, if the potential of the second color-tuning electrode 52 is lower than the potential of the third color-tuning electrode 61, the second color-tuning electrode 52 can be disposed in the entire layer. That is, the second color-tuning electrode 52 can simultaneously serve as the negative electrode of the first color-tuning section 41 and the second color-tuning section 42, and the second light-emitting electrode 33 can simultaneously serve as the positive electrode of the second color-tuning section 42, simplifying the structure and process.

[0104] In some alternative embodiments, refer to Figures 3 to 5 The display panel also includes a light-shielding layer 8 located on the side of the light-emitting structure layer 3 away from the substrate 1. The orthogonal projection of the light-emitting layer 32 onto the substrate 1 is at least partially located outside the orthogonal projection of the light-shielding layer 8 onto the substrate 1. The light-shielding layer 8 is disposed between adjacent light-emitting layers 32. The first color-tuning part 41 is disposed on the side of the light-shielding layer 8 away from the substrate 1.

[0105] The light-shielding layer 8 can be in the form of a mesh structure. The orthographic projection of the light-shielding layer 8 on the substrate 1 is at least partially located between the orthographic projections of the adjacent light-emitting layers 32 on the substrate 1. The light-shielding layer 8 is located on the light-emitting side of the light-emitting layer 32. Therefore, the light-shielding layer 8 can block the light emitted between the adjacent light-emitting layers 32, thereby improving the crosstalk between the light emitted between the adjacent light-emitting layers 32. At the same time, since the light-shielding layer 8 is located below the first color-matching part 41, and the orthographic projection of the light-shielding layer 8 on the substrate 1 can cover the orthographic projection of the first color-matching part 41 on the substrate 1, the light-shielding layer 8 can correspondingly block the traces or devices located below the light-shielding layer 8, that is, provide a pure color base for the first color-matching part 41, so that the first color-matching part 41 can form a clearly colored pattern on the light-shielding layer 8, and avoid the components located below the first color-matching part 41 from affecting the pattern effect of the first color-matching part 41.

[0106] Optional, such as Figure 3 As shown, the light-shielding layer 8 has a second opening 81, and the first color-tuning part 41 is at least partially disposed within the second opening 81. The sidewall of the second opening 81 can block the light emission of the first color-tuning part 41 to avoid crosstalk between the light emission of the adjacent light-emitting layer 32 and the first color-tuning part 41.

[0107] Optionally, the material of the light-shielding layer 8 may include organic adhesive or black matrix material. The color of the organic adhesive can be selected as needed, such as black glue, gray glue, yellow glue, etc., which are the same as the color of the first color matching part 41.

[0108] Optional, such as Figure 3As shown, the display panel also includes an encapsulation layer 72, which is disposed on the side of the second light-emitting electrode 33 facing away from the substrate 1. Considering that a light-shielding layer 8 is provided between adjacent light-emitting layers 32, in this embodiment, the encapsulation layer 72 and the light-emitting layer 32 can be arranged one-to-one, that is, individually encapsulated to ensure the encapsulation effect. Alternatively, the encapsulation layer 72 can be disposed as a whole, with the light-shielding layer 8 disposed on the encapsulation layer 72. The electrode post of the first color-tuning electrode 51 can extend upward to the same layer position as the second light-emitting electrode 33, so as to be closer to the second color-tuning electrode 52 and to form a stable electric field between them. The electrode post of the first color-tuning electrode 51 is insulated and spaced apart from the second light-emitting electrode 33. For example, the second light-emitting electrode 33 can be etched to form an opening structure, and the opening structure can be extended downward to the first color-tuning electrode 51. Then, the electrode post of the first color-tuning electrode 51 can be disposed in the opening structure to electrically connect with the first color-tuning electrode 51.

[0109] In some alternative embodiments, refer to Figure 3 The display panel also includes a protective structure 91 disposed on the side of the adjustable decorative layer 4 facing away from the substrate 1. The protective structure 91 may include a BOCA film (Barrier Organic Composite Film). The application of the BOCA film can enhance the environmental stability of the display panel and improve its ability to protect against moisture, oxygen and other environmental factors that may affect display performance and lifespan.

[0110] In some optional embodiments, the protective structure 91 has a tactile texture structure 92 on the side facing away from the substrate 1. Optionally, the surface of the tactile texture structure 92 facing away from the substrate 1 may have a raised structure 921.

[0111] The cover plate in the prior art can be replaced by the tactile texture structure 92. Different tactile sensations can be achieved by using the raised structure 921. That is, different tactile sensations can be achieved by adjusting the shape, size, and arrangement of the raised structure 921. The surface tactile sensation includes, but is not limited to, leather, wood grain, fabric, glass, and plastic. The cross-sectional shape of the raised structure 921 includes semi-circular, rectangular, and triangular shapes. The surface of the tactile texture structure 92 facing away from the substrate 1 includes, but is not limited to, diffuse matte and reflective glossy surfaces.

[0112] In these embodiments, the cover plate and polarizer in the prior art display panel can also be removed, and an adjustable decorative layer 4 can be used to achieve a dynamically changing skin, and a tactile texture structure 92 can be used to achieve different tactile sensations, thereby improving the user experience.

[0113] Optionally, the material of the tactile texture structure 92 includes at least one of PET, acrylonitrile-butadiene-styrene copolymer (ABS), polycarbonate (PC), polymethyl methacrylate (PMMA), and silicone.

[0114] In some alternative embodiments, refer to Figure 3 The substrate includes a first driving circuit 21 and a second driving circuit 22. The first driving circuit 21 is connected to the first light-emitting electrode 31, and the second driving circuit 22 is connected to the first color-adjusting electrode 51.

[0115] Optionally, the first driving circuit 21 and the second driving circuit 22 may be located in the same single film layer or in the same multilayer film layer.

[0116] The second driving circuit 22 and the first driving circuit 21 can be misaligned in their orthographic projections on the substrate 1, but they can be disposed in the same film structure. The second driving circuit 22 and the first driving circuit 21 can be disconnected and controlled independently, or a connection switch can be provided so that the second driving circuit 22 can change in response to the electrical signal changes of the first driving circuit 21, allowing the adjacent first color-tuning part 41 and the light-emitting layer 32 to change synchronously, simplifying the control logic. The second driving circuit 22 and the first driving circuit 21 can be fabricated simultaneously, simplifying the fabrication process and improving efficiency.

[0117] The first driving circuit 21 and the second driving circuit 22 can be located simultaneously within the driving device layer of the display panel. For example, the first driving circuit 21 may include a first conductive layer, a second conductive layer, and a third conductive layer disposed on one side of the substrate 1 and stacked thereon. An insulating layer is disposed between adjacent conductive layers. Exemplarily, the pixel driving circuit disposed in the first driving circuit 21 includes a transistor and a storage capacitor. The transistor includes an active layer, a gate, a source, and a drain. The materials of the source and gate may include one or more combinations of molybdenum, titanium, aluminum, copper, etc. The gate of the transistor is typically used to receive a control signal, causing the transistor to turn on or off under the control of the control signal. One of the source and drain of the transistor is connected to the first light-emitting electrode 31 to control the normal light emission of the light-emitting layer 32. The structure of the second driving circuit 22 can be set with reference to the first driving circuit 21, and will not be described again here.

[0118] A second aspect of this application provides a display device that includes a display panel of any of the embodiments of the first aspect described above. Since the display device provided in the second aspect of this application includes the display panel of any of the embodiments of the first aspect described above, it possesses the beneficial effects of the display panel of any of the embodiments of the first aspect described above, which will not be elaborated further here.

[0119] The display device provided in this application embodiment can be an organic light-emitting diode (OLED) display device, a quantum dot light-emitting diode (QLED) device, or a micro flat panel display device (Micro-OLED or Micro-LED), etc.

[0120] The display device provided in this application embodiment can be applied to mobile phones, or to any electronic product with display function, including but not limited to the following categories: televisions, laptops, desktop monitors, tablets, digital cameras, smart bracelets, smart glasses, vehicle displays, medical devices, industrial control equipment, touch interactive terminals, etc. This application embodiment does not make any special limitations on these.

[0121] A third aspect of this application provides a driving method for driving a display panel according to any of the embodiments of the first aspect described above. The driving method includes:

[0122] In T1, the adjustable decorative layer is either black or neutral in color in the first state.

[0123] In state T2, corresponding to the display state of each light-emitting layer of the light-emitting structure layer, the power supply to the color-tuning electrode is stopped after the adjustable decorative layer is driven to black by controlling the color-tuning electrode.

[0124] In state T3, corresponding to the off state of each light-emitting layer of the light-emitting structure layer, the power supply to the color-tuning electrode is stopped after the adjustable decorative layer is driven to present a static pattern by controlling the color-tuning electrode, or the adjustable decorative layer is driven to change the pattern at a low frequency by controlling the color-tuning electrode.

[0125] In state T4, corresponding to the off state of each light-emitting layer of the light-emitting structure layer, the color-tuning electrode is controlled to drive the adjustable decorative layer to display a low-frequency changing pattern.

[0126] In the driving method provided by the third aspect embodiment of this application, under the drive of the electric field formed by the color-tuning electrode, the color and pattern displayed by the adjustable decorative layer 4 can change dynamically. That is, the color and pattern of the adjustable decorative layer 4 can be selected according to the external environment, realizing the integration of the display panel and the environment. It is suitable for home, vehicle and other environments, and the fixed position of the display is not easy to age, improving the user experience and improving the performance of the display panel.

[0127] When the color and pattern of the adjustable decorative layer 4 change, the user can observe it intuitively. Therefore, the color and pattern of the adjustable decorative layer 4 can be adjusted by adjusting the magnitude of the electric field voltage between the first color adjustment electrode 51 and the second color adjustment electrode 52 according to the environment of the display panel, so as to achieve the integration of the display panel and the environment.

[0128] Under the influence of an electric field, some colored particles can undergo electrophoresis along the direction of the electric field to accumulate on the surface of the adjustable decorative layer 4 away from the substrate 1. By adjusting the charge properties of the colored particles and their specific colors, the adjustable decorative layer 4 can display the desired color pattern.

[0129] Among them, T1-T4 can correspond to different times when the display panel is used.

[0130] For example, at time T1, the adjustable decorative layer 4 corresponds to the initial state. Multiple sealed cavities are provided in the adjustable decorative layer 4 to contain a liquid medium. Colored particles are suspended in a sealed cavity filled with the liquid medium, which contains colored particles with both positive and negative charges. In the initial state, without an applied electric field, these colored particles are randomly distributed, causing the adjustable decorative layer 4 to appear black or neutral.

[0131] At time T2, if the light-emitting layer 32 of the display panel needs to present the best display effect, the adjustable decorative layer 4 needs to present the most imperceptible effect, that is, the lowest reflectivity. This can be achieved by sending an electrical signal to the color-tuning electrode through the control chip. Under the action of electrophoresis, the K color particles start to move and gather on the side of the adjustable decorative layer 4 away from the substrate 1, so that the adjustable decorative layer 4 appears black.

[0132] At time T3, the adjustable decorative layer 4 needs to present a high-quality display effect in a static scene. By precisely controlling the electrical signal, the adjustable decorative layer 4 at different positions can display various colors. When the electrical signal is turned off, the pattern is stable and does not consume power. It is suitable for static scenes and can achieve integrated integration with the environment, such as home and car environments.

[0133] At time T4, the adjustable decorative layer 4 needs to present a high-quality display effect in the dynamic scene. By precisely controlling the electrical signal, the adjustable decorative layer 4 at different positions can display various colors. After the scene changes, the display of the adjustable decorative layer 4 is automatically refreshed to dynamically achieve integrated integration with the environment.

[0134] The embodiments described above are not exhaustive, nor do they limit the invention to the specific embodiments described. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to effectively utilize this application and its modifications. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that, include: substrate; A light-emitting structure layer is disposed on one side of the substrate. The light-emitting structure layer includes a light-emitting unit. The light-emitting unit includes a first light-emitting electrode, a light-emitting layer, and a second light-emitting electrode. The first light-emitting electrode, the light-emitting layer, and the second light-emitting electrode are sequentially stacked in a direction away from the substrate. An adjustable decorative layer is disposed on the side of the light-emitting structure layer away from the substrate. The adjustable decorative layer includes a plurality of color-tuning units. The plurality of color-tuning units include a first color-tuning unit. The first color-tuning unit includes a first color-tuning electrode, a first color-tuning part and a second color-tuning electrode that are sequentially stacked along a direction away from the substrate. The orthographic projection of the first color-tuning part on the substrate does not coincide with the orthographic projection of the light-emitting layer on the substrate. The first color-tuning electrode and the first light-emitting electrode are disposed in the same layer.

2. The display panel according to claim 1, characterized in that, The first color-matching unit further includes an auxiliary electrode, which is connected to the first color-matching electrode and extends toward the first color-matching section; Preferably, the second color-tuning electrode has a first opening, and the orthographic projection of the first opening on the substrate at least partially overlaps with the orthographic projection of the light-emitting layer on the substrate.

3. The display panel according to claim 1, characterized in that, The display panel further includes a filter layer, which includes a plurality of filter sections, wherein the orthographic projection of each filter section on the substrate and the orthographic projection of each light-emitting layer on the substrate at least partially overlap; Preferably, the filter layer includes at least two filter portions of different colors, and the filter portions of different colors are disposed in a one-to-one correspondence with the light-emitting layers of different colors; Preferably, the filter section and the first color-correcting section are at least partially disposed in the same layer.

4. The display panel according to claim 1, characterized in that, The plurality of color tuning units further includes a second color tuning unit, the second color tuning unit including a third color tuning electrode, a second color tuning part and a fourth color tuning electrode stacked sequentially along a direction away from the substrate, the orthogonal projection of the second color tuning part on the substrate and the orthogonal projection of the light-emitting layer on the substrate at least partially overlap; Preferably, the second color-tuning section includes a first particle, a transparent particle, and a black particle, wherein the color of the first particle is the same as the light-emitting color of the light-emitting layer corresponding to the second color-tuning section; Preferably, the second color-matching section is disposed on the same layer as the first color-matching section.

5. The display panel according to claim 4, characterized in that, The fourth color-tuning electrode and the second color-tuning electrode are an integral structure.

6. The display panel according to claim 5, characterized in that, The second color-tuning electrode has a first opening, the orthographic projection of the first opening on the substrate at least partially overlaps with the orthographic projection of the light-emitting layer on the substrate, and the fourth color-tuning electrode is at least partially disposed within the first opening; Preferably, the second light-emitting electrode is reused as the third color-tuning electrode.

7. The display panel according to claim 5, characterized in that, The second color-tuning electrode and the fourth color-tuning electrode are integrally formed, and / or the second light-emitting electrode is reused as the third color-tuning electrode.

8. The display panel according to any one of claims 1 to 7, characterized in that, The display panel further includes a light-shielding layer located on the side of the light-emitting structure layer away from the substrate, wherein at least part of the orthogonal projection of the light-emitting layer on the substrate is located outside the orthogonal projection of the light-shielding layer on the substrate, and the first color-tuning part is disposed on the side of the light-shielding layer away from the substrate. Preferably, the material of the light-shielding layer includes black matrix; Preferably, the light-shielding layer has a second opening, and the first color-adjusting part is at least partially disposed within the second opening; Preferably, the material of the light-shielding layer includes an organic adhesive. Preferably, the display panel further includes an encapsulation layer disposed on the side of the second light-emitting electrode opposite to the substrate.

9. The display panel according to any one of claims 1 to 7, characterized in that, The adjustable decorative layer includes a base layer, on which a plurality of sealed cavities are provided. Each sealed cavity includes a liquid medium and charged particles disposed in the liquid medium, wherein the charged particles carry positive or negative charges. Preferably, the charged particles comprise multiple colored particles of different colors; Preferably, the first color-matching section includes a plurality of capsule-shaped structures, and the capsule-shaped structures include the sealed cavity; Preferably, the colored particles include ink particles; Preferably, the colored particles include at least one of cyan particles, magenta particles, yellow particles, and black particles; Preferably, different types of colored particles are disposed in different sealed cavities.

10. The display panel according to any one of claims 1 to 7, characterized in that, The display panel also includes a protective structure disposed on the side of the adjustable decorative layer opposite to the substrate; Preferably, the protective structure has a tactile texture structure on the side facing away from the substrate; Preferably, the material of the tactile texture structure includes at least one of polyterephthalate, acrylonitrile-butadiene-styrene copolymer, polycarbonate, polymethyl methacrylate, and silicone.

11. The display panel according to any one of claims 1 to 7, characterized in that, The substrate includes a first driving circuit and a second driving circuit, wherein the first driving circuit is connected to the first light-emitting electrode and the second driving circuit is connected to the first color-tuning electrode.

12. A display device, characterized in that, The display panel includes any one of claims 1 to 11.

13. A driving method for driving a display panel as described in any one of claims 1 to 11, characterized in that, The driving method includes: When the light-emitting unit corresponding to the light-emitting structure layer is in display mode, power supply to the color-tuning electrode is stopped after the adjustable decorative layer is driven to black by controlling the color-tuning electrode; or... Corresponding to the off state of each light-emitting unit in the light-emitting structure layer, the power supply to the color-tuning electrode is stopped after the adjustable decorative layer is driven to display a static pattern by controlling the color-tuning electrode, or the color-tuning electrode is controlled to drive the adjustable decorative layer to change patterns at low frequency; or... Corresponding to the off state of each light-emitting unit in the light-emitting structure layer, the color-tuning electrode is controlled to drive the adjustable decorative layer to display a low-frequency changing pattern.

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