Display panel, display device, control method and preparation method of display panel

Abstract

Embodiments of the present application provide a display panel, a display device, a control method and a preparation method of the display panel. The display panel comprises a first area, the first area comprises an array substrate, a light-emitting layer, an encapsulation layer and a matrix layer which are arranged in a stack, and further comprises a long afterglow component, the long afterglow component is arranged at any film layer of the pixel definition structure away from the array substrate, and is used for being in a closed state in a display state of the display panel, being in an open state in a non-display state of the display panel, absorbing ambient light and storing in a bright state environment when in the open state, and emitting light to the environment in a dark state environment; the embodiments of the present application realize that the display panel can emit indicative light in the dark state without consuming electric energy, or does not interfere with the display light of the display panel in the display state.

Description

Technical Field

[0001] The present application relates to the technical field of display panels. Specifically, the present application relates to a display panel, a display device, a control method for a display panel, and a manufacturing method thereof. Background Art

[0002] With the widespread use of electronic display devices, people's lives are becoming more and more convenient, and their dependence on such products, such as mobile phones, tablets, and electronic watches, is also increasing. In dark conditions, such as at night, because the display interface of the device is turned off, manual operation is required to turn on the display interface and light up the screen. People often encounter situations where they cannot find the required devices, which affects work efficiency and happiness.

[0003] In existing technologies, light-emitting electronic components, such as signal lights and illuminated buttons, are installed on devices to generate light in response to electrical energy. However, these components consume the device's power, affecting its standby time or placing higher demands on its power storage unit. Alternatively, long-lasting materials are applied or affixed to certain parts of the electronic device, utilizing their photoluminescent properties to generate light. However, the light emitted by these materials can interfere with the display light during use, affecting user comfort. Summary of the Invention

[0004] In response to the shortcomings of existing methods, the present application proposes a display panel, a display device, a control method for a display panel, and a manufacturing method to solve the technical problems in the prior art that the light-emitting components consume the power of the device or interfere with the display light.

[0005] In a first aspect, an embodiment of the present application provides a display panel, comprising a first region, wherein the first region comprises an array substrate, a light-emitting layer, an encapsulation layer, and a matrix layer stacked in layers, and further comprises a long-afterglow component;

[0006] The matrix layer includes a matrix structure arranged in an array, the light-emitting layer includes light-emitting units arranged in an array, pixel defining structures are provided between the light-emitting units, and the orthographic projection of the matrix structure on the array substrate is located within the orthographic projection range of the pixel defining structure on the array substrate;

[0007] The long afterglow component is arranged at any film layer on the side of the pixel defining structure away from the array substrate, and is used to be in a closed state when the display panel is in the display state, and in an open state when the display panel is in the non-display state, so that the long afterglow component in the open state absorbs and stores ambient light in a bright environment, and emits light to the environment in a dark environment.

[0008] Optionally, the long afterglow component includes an electrochromic layer and a long afterglow luminescent layer that are stacked;

[0009] The electrochromic layer is configured to be transparent in the on state, allowing ambient light to pass through and act on the long-afterglow luminescent layer, as well as light emitted through the long-afterglow luminescent layer to the environment; and to be opaque in the off state, preventing both ambient light and light emitted by the long-afterglow luminescent layer from passing through.

[0010] The long afterglow luminescent layer is used to absorb and store ambient light in a bright state environment in the on state, and to emit light in a dark state environment.

[0011] Optionally, the long afterglow component further includes a first electrode layer, a second electrode layer and a light shielding layer;

[0012] The first electrode layer and the second electrode layer are respectively arranged on both sides of the electrochromic layer, and the light shielding layer is arranged around the first electrode layer, the electrochromic layer, the second electrode layer and the long afterglow luminescent layer;

[0013] The first electrode layer and the second electrode layer are used to enable the electrochromic layer to be in the on state or the off state, and the light shielding layer is used to prevent light from the long afterglow luminescent layer from passing through.

[0014] Optionally, the matrix structure includes a light-shielding structure, and the long afterglow component is arranged at any film layer on a side of the light-shielding structure away from the encapsulation layer.

[0015] Optionally, a groove is formed on a side of the light-shielding structure away from the encapsulation layer, and the long afterglow component is arranged in the groove.

[0016] Optionally, the matrix structure includes a light-transmitting structure, and the long afterglow component is arranged at any film layer between the pixel defining structure and the light-transmitting structure.

[0017] Optionally, the matrix structure includes a shading structure, the long afterglow component is arranged at any film layer between the pixel defining structure and the shading structure, and the distance between the long afterglow component and the shading structure is greater than a designed distance.

[0018] Optionally, the long afterglow component is arranged on a side of the pixel defining structure away from the array substrate, and the encapsulation layer covers the long afterglow component.

[0019] Optionally, the display panel further includes at least one of the following:

[0020] The first area is located in the display area of ​​the display panel;

[0021] The first area is used to correspond to a fingerprint recognition device, a fingerprint recognition area of ​​a fingerprint recognition array film layer, or a design logo display area in the display area;

[0022] The orthographic projection of the long afterglow component on the matrix structure is located within the shape of the matrix structure.

[0023] In a second aspect, an embodiment of the present application provides a display device, comprising the display panel provided in the first aspect of the present application.

[0024] In a third aspect, an embodiment of the present application provides a method for controlling a display panel, which is used to control the display panel provided in the first aspect of the present application, including:

[0025] When the display panel is in a display state, controlling the long afterglow component to be in a closed state;

[0026] When the display panel is in a non-display state, the long afterglow component is controlled to be in an on state, so that the long afterglow component in the on state absorbs and stores ambient light in a bright state environment, and emits light to the environment in a dark state environment.

[0027] In a fourth aspect, an embodiment of the present application provides a method for manufacturing a display panel, which is used to manufacture the display panel provided in the first aspect of the present application, comprising:

[0028] A pixel defining layer and a light-emitting layer are prepared on one side of the array substrate, wherein the light-emitting layer includes light-emitting units arranged in an array, and a pixel defining structure of the pixel defining layer is provided between the light-emitting units;

[0029] preparing an encapsulation layer on a side of the pixel defining layer and the light emitting layer away from the array substrate;

[0030] On a side of the encapsulation layer away from the pixel defining structure, a matrix layer is prepared, wherein the matrix layer includes a matrix structure arranged in an array;

[0031] A long afterglow component is provided in the first area of ​​the display panel and at any film layer on a side of the matrix structure away from the encapsulation layer.

[0032] In a fifth aspect, an embodiment of the present application provides a method for manufacturing a display panel, which is used to manufacture the display panel provided in the first aspect of the present application, comprising:

[0033] A pixel defining layer and a light-emitting layer are prepared on one side of the array substrate, wherein the light-emitting layer includes light-emitting units arranged in an array, and a pixel defining structure of the pixel defining layer is provided between the light-emitting units;

[0034] A long afterglow component is provided on a side of the pixel defining structure away from the array substrate;

[0035] preparing an encapsulation layer on a side of the long afterglow component, the pixel defining layer, and the light-emitting layer away from the array substrate, wherein the encapsulation layer covers the long afterglow component;

[0036] A matrix layer is prepared on a side of the encapsulation layer away from the pixel defining structure, wherein the matrix layer includes a matrix structure arranged in an array.

[0037] The beneficial technical effects brought about by the technical solutions provided in the embodiments of the present application include:

[0038] The display panel provided in the embodiment of the present application includes a first area, which includes a long afterglow component. The long afterglow component does not need to consume electrical energy of the device and can emit light to the environment after absorbing light. The light emission is easy to observe in a dark environment.

[0039] Furthermore, the long afterglow component is turned on or off according to the state of the display panel, and can be turned off when the display panel is in the display state, ensuring that the display light of the display panel is not disturbed. Specifically:

[0040] The display panel provided in the embodiment of the present application includes a first area, and the first area includes a long afterglow component. When the long afterglow component is turned on, it can absorb and store ambient light in a bright environment, and emit light to the environment in a dark environment. Therefore, the long afterglow component does not consume the power of the device when emitting light, so that the device can emit indicative light in the dark state while ensuring that normal standby is not affected.

[0041] Moreover, the long afterglow component is arranged at any film layer on the side of the pixel defining structure away from the array substrate. When the display panel is in the display state, it is in the closed state, ensuring that the light of the long afterglow component is not emitted into the environment and does not interfere with the display light of the display panel in the display state. The long afterglow component of the present application will not affect the normal display of the display panel. When the display panel is in the non-display state, the long afterglow component is in the open state. In the bright environment, the display panel does not need to emit indicator light (referring to the light used to indicate the position of the display device to which the display panel belongs). The long afterglow component absorbs ambient light and stores it. In the dark environment, when the display panel needs to emit indicator light, the long afterglow component emits indicator light into the environment based on the stored energy, which is beneficial for the user to quickly find and locate the display device to which the long afterglow component belongs based on the indicator light, and facilitates the retrieval of the display device in the non-display state in the dark environment. The state of the long afterglow component is organically combined with the state of the display panel, which is beneficial to improving the user experience.

[0042] Additional aspects and advantages of the present application will be given in part in the following description, which will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0044] Figure 1 A schematic diagram of the light-emitting principle of a long afterglow material provided in an embodiment of the present application;

[0045] Figure 2 This is a graph showing the afterglow intensity of a long afterglow material provided in an embodiment of the present application;

[0046] Figure 3 A schematic diagram of the position of a first area on a display panel provided in an embodiment of the present application;

[0047] Figure 4 A schematic diagram of a first structure of the first area of ​​the display panel provided in an embodiment of the present application;

[0048] Figure 5 A schematic structural diagram of a long afterglow component provided in an embodiment of the present application;

[0049] Figure 6 A schematic diagram of a second structure of the first area of ​​the display panel provided in an embodiment of the present application;

[0050] Figure 7 A schematic diagram of a third structure of the first region of the display panel provided in an embodiment of the present application;

[0051] Figure 8 A schematic top view of a structural fragment in a first area of ​​a display panel provided in an embodiment of the present application;

[0052] Figure 9 A schematic flow chart of a method for preparing a first region of a display panel provided in an embodiment of the present application;

[0053] Figure 10 A schematic flow chart of another method for preparing the first region of a display panel provided in an embodiment of the present application.

[0054] The reference numerals of the accompanying drawings are explained as follows:

[0055] 1-first area; 2-display panel; 201-display area;

[0056] 101-array substrate;

[0057] 102-light-emitting layer; 1021-light-emitting unit; 1022-pixel defining structure;

[0058] 103-encapsulation layer;

[0059] 104-matrix layer; 1041-matrix structure; 1041a-light shielding structure;

[0060] 105 - long afterglow component; 1051 - electrochromic layer; 1052 - long afterglow luminescent layer; 1053 - first electrode layer; 1054 - second electrode layer; 1055 - light shielding layer. DETAILED DESCRIPTION

[0061] The present application is described in detail below. Examples of embodiments of the present application are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. In addition, if the detailed description of the known technology is not necessary for the features of the present application shown, it will be omitted. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0062] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0063] It will be understood by those skilled in the art that, unless otherwise stated, the singular forms "a," "an," "said," and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of this application refers to the presence of the stated features, integers, steps, operations, elements, and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that the term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0064] First, several terms involved in this application are introduced and explained:

[0065] Long afterglow material: Long afterglow material is also called light-storage material or luminous material. It refers to a photoluminescent material that can store energy irradiated by external light under natural light or other artificial light sources, and then slowly release the stored energy in the form of visible light at a certain temperature (room temperature).

[0066] The luminescence principle of long afterglow materials, such as Figure 1As shown: The conduction band is the energy space formed by free electrons, and the valence band is usually the highest energy band that can be occupied by electrons at absolute zero in semiconductors or insulators. The conduction band has higher energy than the valence band, and the electrons in the conduction band can be formed by the electrons in the valence band being excited and transitioning. In the process of preparing long afterglow materials, the doped elements form luminescence centers and trap centers in the matrix. When excited by external light, the ground state electrons of the luminescence center transition to the excited state, such as Figure 1 The black circles in the conduction band represent excited electrons. When these electrons jump back to the ground state from the excited state, Figure 1 The white circles in the conduction band represent ground-state electrons, which generate luminescence. When stimulated, some electrons fall into the trap center and become trapped. When the light is removed, the trapped electrons, affected by the ambient temperature, jump out of the trap and fall back to the ground state. The released energy excites the luminescence center, generating luminescence. The trapped electrons gradually jump out of the trap, and the luminescence is a long-lasting process, resulting in a long-lasting luminescence phenomenon.

[0067] A long afterglow material of the present application is mainly composed of aluminate or sulfide, and the general chemical composition formula is Ba3xySiAl2O8:xEu2+,yRe3+, wherein the elements are Ba (barium), Si (silicon), Al (aluminum), O (oxygen) and Eu (europium), wherein Re is one or more combinations of Tm (thulium), Gd (gadolinium) and Nd (neodymium), and the value ranges of x and y are: 0.01≤x≤0.20, 0.01≤y≤0.20 respectively.

[0068] This long-afterglow material is excited at wavelengths between 200nm (nanometers) and 450nm, with the main peak of afterglow luminescence occurring at 490nm. Visible light has a wavelength range of 380nm to 780nm, so it can be excited in bright conditions, i.e., in the presence of visible light. Furthermore, the wavelength of green light in visible light ranges from 577nm to 492nm, so the emitted light is green.

[0069] Research related to the inventive concept of this application has revealed that there are two types of photoreceptor cells in the human retina: a dense distribution of cones in the central area directly opposite the pupil, and rods primarily surrounding the central area. Rods are highly sensitive and can sense weak light. In very dark environments, with brightness less than a few thousandths of a candela per square meter, the cones lose their activity and the rods become photosensitive. This state of vision is called scotopic vision. It is characterized by the ability to distinguish only light and dark, without color perception, and the ability to discern detail in objects is greatly reduced. In this condition, the human eye is also unable to distinguish color, and scotopic vision is most sensitive to radiation with a wavelength of 507 nm. The luminescence spectrum of this long-lasting glow material, namely, the main peak of the afterglow luminescence during luminescence, is at 490 nm, close to the peak of human scotopic vision.

[0070] At the same time, this long afterglow material absorbs visible light in a bright environment, that is, after being excited by visible light for a few minutes, it can continue to emit light for more than 10 hours in a dark environment. Studies have found that the afterglow time can reach 4000 minutes. The afterglow intensity curve of the long afterglow material within 300 minutes is as follows Figure 2 As shown, the horizontal axis represents the luminous time in minutes; the vertical axis represents the relative luminous intensity of the afterglow of the long afterglow material. At the 10th minute, the relative luminous intensity of the afterglow is 400mcd / m2 (candela per square meter), and at the 60th minute, the relative luminous intensity of the afterglow is 60mcd / m2. After 60 minutes, the relative luminous intensity of the afterglow decreases slowly.

[0071] The following describes in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems with specific embodiments.

[0072] The embodiment of the present application provides a display panel 2, including a first area 1, such as Figure 3 As shown, the first region 1 is included in the display region 201 of the display panel 2. The structure of the first region 1 is as follows: Figure 4 As shown, it includes an array substrate 101 , a light-emitting layer 102 , an encapsulation layer 103 and a matrix layer 104 which are stacked, and also includes a long afterglow component 105 .

[0073] The matrix layer 104 includes a matrix structure 1041 arranged in an array, the light-emitting layer 102 includes light-emitting units 1021 arranged in an array, and pixel defining structures 1022 are arranged between the light-emitting units 1021. The orthographic projection of the matrix structure 1041 on the array substrate 101 is located within the orthographic projection range of the pixel defining structure 1022 on the array substrate 101.

[0074] The long afterglow component 105 is arranged at any film layer on the side of the pixel defining structure 1022 away from the array substrate 101, and is used to be in a closed state when the display panel 2 is in the display state, and in an open state when the display panel 2 is in the non-display state, so that the long afterglow component 105 in the open state absorbs and stores ambient light in a bright environment, and emits light to the environment in a dark environment.

[0075] The display panel 2 provided in the embodiment of the present application includes a first area 1, and the first area 1 includes a long afterglow component 105. The long afterglow component 105 does not need to consume electrical energy of the device, and can emit light to the environment after absorbing light. The light emission is easy to observe in a dark environment.

[0076] Moreover, the long afterglow component 105 is in an open or closed state according to the state of the display panel 2, and can be closed when the display panel 2 is in the display state, ensuring that the display light of the display panel 2 is not disturbed. Specifically:

[0077] The display panel 2 provided in the embodiment of the present application includes a first area 1, and the first area 1 includes a long afterglow component 105. When the long afterglow component 105 is in the on state, it can absorb and store ambient light in a bright environment, and emit light to the environment in a dark environment. Therefore, the long afterglow component 105 does not consume the power of the device when emitting light, so that the device can emit indicative light in the dark state while ensuring that normal standby is not affected.

[0078] Furthermore, the long-lasting glow component 105 is disposed at any film layer on the side of the pixel defining structure 1022 away from the array substrate 101. When the display panel 2 is in the display state, it is in the closed state, ensuring that the light from the long-lasting glow component 105 is not emitted into the environment and does not interfere with the display light of the display panel 2 in the display state. The long-lasting glow component 105 of the present application does not affect the normal display of the display panel. When the display panel 2 is in the non-display state, the long-lasting glow component 105 is in the open state. In a bright environment, the display panel 2 does not need to emit indicator light (referring to light used to indicate the location of the display device to which the display panel belongs). The long-lasting glow component 105 absorbs ambient light and stores it. In a dark environment, when the display panel 2 needs to emit indicator light, the long-lasting glow component 105 emits indicator light into the environment based on the stored energy. This helps users quickly find and locate the display device to which the long-lasting glow component 105 belongs based on the indicator light, making it easier to find the display device in the non-display state in a dark environment. The state of the long-lasting glow component is organically integrated with the state of the display panel 2, which is beneficial to improving the user experience.

[0079] Optionally, the bright state environment includes visible light outside the display panel 2 , and the visible light can excite the long afterglow component 105 .

[0080] Optionally, the dark environment includes a situation where there is no visible light outside the display panel 2, and the light emitted by the long afterglow component 105 into the environment can be observed.

[0081] Optionally, when the long afterglow component 105 is in the closed state, the light in the environment cannot be absorbed by the long afterglow component 105, and the long afterglow component 105 cannot emit light to the environment.

[0082] Optionally, the long afterglow component 105 is arranged at any film layer on the side of the pixel defining structure 1022 away from the array substrate 101, so that external light can pass through the display panel 2 including the matrix layer 104, the encapsulation layer 103 and other structures, and act on the long afterglow component 105. At the same time, the light emitted by the long afterglow component 105 can pass through the display panel 2 including the matrix layer 104, the encapsulation layer 103 and other structures, and be emitted into the environment.

[0083] Optionally, the first area 1 on the display panel 2 includes a long afterglow component 105 , that is, when the display panel 2 is in a dark environment, the first area 1 can emit light to the environment to provide an indication function.

[0084] Optionally, according to the properties of the long afterglow material, the light emitted in a dark environment has a low intensity and lasts for a long time. The weak light state can avoid problems such as user sleep in the dark state, and the persistence can ensure that the user can be found at any time in the dark state.

[0085] In some embodiments, as Figure 5 As shown, the long afterglow component 105 includes an electrochromic layer 1051 and a long afterglow luminescent layer 1052 which are stacked.

[0086] The electrochromic layer 1051 is used to be transparent in the on state, allowing ambient light to pass through and act on the long afterglow luminous layer 1052, as well as light emitted by the long afterglow luminous layer 1052 to the environment; in the off state, it is opaque, preventing ambient light and light emitted by the long afterglow luminous layer 1052 from passing through.

[0087] The long afterglow luminescent layer 1052 is used to absorb and store ambient light in a bright environment when in the on state, and to emit light in a dark environment.

[0088] Optionally, the electrochromic layer 1051 can reversibly change state when the long afterglow component 105 is turned on and off. The material of the electrochromic layer 1051 includes a single layer of inorganic transition metal oxides such as tungsten oxide, molybdenum oxide, vanadium oxide, titanium oxide, or a Prussian blue system, or can be an organic electrochromic material including polyaniline, polythiophene, etc.

[0089] Optionally, the material of the long-lasting light-emitting layer 1052 includes a long-lasting light-emitting material.

[0090] Optionally, in the on state, the electrochromic layer 1051 appears transparent. When in a bright environment, ambient light passes through and acts on the long-afterglow luminescent layer 1052. The long-afterglow luminescent layer 1052 absorbs and stores the ambient light in the bright environment. While the long-afterglow luminescent layer 1052 also emits light into the environment through the transparent electrochromic layer 1051, the intensity of the indicator light emitted by the long-afterglow component 105 is much lower than that of the ambient light and is therefore masked by the ambient light.

[0091] When in a dark environment, the long afterglow luminous layer 1052 can emit light into the environment through the transparent electrochromic layer 1051. At this time, the indicator light emitted by the long afterglow component 105 is stronger than the ambient light, and the light emitted by the long afterglow component 105 is easily recognized by the user.

[0092] At the same time, the display panel 2 is in a non-display state, that is, the display device is not working, and the display panel 2 does not emit display light. The light of the long afterglow luminous layer 1052 passes through the transparent electrochromic layer 1051 and other film layer structures of the display panel 2, and has no effect on the non-working display device.

[0093] Optionally, in the off state, the electrochromic layer 1051 is opaque, and in a bright or dark environment, ambient light and light emitted by the long afterglow luminous layer 1052 cannot pass through the electrochromic layer 1051 .

[0094] At the same time, the display panel 2 is in the display state, that is, the display device is working at this time, the display panel 2 emits display light, and the user uses the display device through the display light. At this time, the light of the long afterglow luminous layer 1052 cannot pass through the opaque electrochromic layer 1051, cannot emit light to the environment, and cannot interfere with the display light. The light emitted by the display panel 2 at this time is only display light, and the use of the display device is not affected.

[0095] In some embodiments, the long afterglow component 105 further includes a first electrode layer 1053 , a second electrode layer 1054 and a light shielding layer 1055 .

[0096] The first electrode layer 1053 and the second electrode layer 1054 are respectively disposed on both sides of the electrochromic layer 1051 , and the light shielding layer 1055 is disposed around the first electrode layer 1053 , the electrochromic layer 1051 , the second electrode layer 1054 and the long afterglow luminescent layer 1052 .

[0097] The first electrode layer 1053 and the second electrode layer 1054 are used to turn the electrochromic layer 1051 on or off, and the light shielding layer 1055 is used to prevent light from passing through the long afterglow luminescent layer 1052 .

[0098] Optionally, the first electrode layer 1053 and the second electrode layer 1054 can control the electrochromic layer 1051 to be in an on state or a off state by applying a voltage to the electrochromic layer 1051, including making the electrochromic layer 1051 in an off state when there is an electric field and appear opaque, and in an on state when there is no electric field and appear transparent.

[0099] Optionally, the first electrode layer 1053 and the second electrode layer 1054 are the upper electrode and the lower electrode respectively, and the corresponding relationship can be changed, including the upper electrode being used to connect to the control circuit and the lower electrode being used to ground; or the upper electrode and the lower electrode are respectively connected to the control circuit.

[0100] Optionally, the first electrode layer 1053 and the second electrode layer 1054 are transparent conductive materials, including thin film transparent electrode materials such as indium tin oxide ITO, IGZO (Indium Gallium Zinc Oxide), zinc oxide ZnO: aluminum Al, and indium zinc oxide IZO.

[0101] Optionally, those skilled in the art will appreciate that the control of the electrochromic layer 1051 by the first electrode layer 1053 and the second electrode layer 1054 may also be manifested as causing the electrochromic layer 1051 to be in an on state in the presence of an electric field and in an off state in the absence of an electric field, or other control methods, which will not be elaborated here.

[0102] Optionally, the light shielding layer 1055 is used to prevent light from the long afterglow luminescent layer 1052 from passing through locations other than the electrochromic layer 1051 , so that light transmission of the long afterglow luminescent layer 1052 is only controlled by the electrochromic layer 1051 .

[0103] Optionally, the light shielding layer 1055 includes metal thin film chromium, black resin, etc.

[0104] In some embodiments, the matrix structure 1041 includes a light-shielding structure 1041 a , and the long afterglow component 105 is disposed at any film layer on a side of the light-shielding structure 1041 a away from the encapsulation layer 103 .

[0105] Optionally, the number of the long afterglow components 105 includes at least two, and the long afterglow components 105 are arranged in an array. Optionally, the long afterglow components 105 are arranged in an array according to the matrix structure 1041 arranged in an array, for example, the long afterglow components 105 and the matrix structure 1041.

[0106] In some embodiments, as Figure 6 As shown, a groove is formed on a side of the light shielding structure 1041 a away from the packaging layer 103 , and the long afterglow component 105 is disposed in the groove.

[0107] Optionally, the light shielding structure 1041 a includes a BM (Black Matrix) film, and the light shielding structure 1041 a includes a metal thin film chromium, a black resin, and the like.

[0108] Optionally, the shading structure 1041a can be reused as the shading layer 1055 in the long afterglow component 105, and the long afterglow component 105 including the first electrode layer 1053, the electrochromic layer 1051, the second electrode layer 1054 and the long afterglow luminescent layer 1052 is included in the groove of the shading structure 1041a.

[0109] In some embodiments, the matrix structure 1041 includes a light-transmitting structure, and the long-persistence component 105 is disposed at any film layer between the pixel-defining structure 1022 and the light-transmitting structure.

[0110] Optionally, at least an encapsulation layer 103 is included between the pixel defining structure 1022 and the light-transmitting structure.

[0111] Optionally, the orthographic projection of the light-transmitting structure on the array substrate 101 is within the orthographic projection range of the pixel defining structure 1022 on the array substrate 101 , so the long afterglow component 105 is within the orthographic projection range of the light-transmitting structure on the array substrate 101 .

[0112] Optionally, the light-transmitting structure includes a middle area of ​​the matrix structure 1041 as a light-transmitting portion, and the light-transmitting portion at least partially overlaps with the orthographic projection of the long afterglow component 105 on the array substrate 101, so that when the long afterglow component 105 is in the turned-on state, it can absorb and store ambient light passing through the light-transmitting portion in a bright environment, and emit light to the environment through the light-transmitting portion in a dark environment.

[0113] Optionally, the light-transmitting structure further includes an electrochromic matrix structure 1041 , which appears transparent when the long afterglow component 105 is turned on, and appears opaque when the long afterglow component 105 is turned off.

[0114] Optionally, those skilled in the art will appreciate that the light-transmitting structure also includes other forms, which will not be described here in detail.

[0115] Optionally, the long afterglow component 105 includes at least two pixel defining structures 1022 and light-transmitting structures arranged in an array.

[0116] In some embodiments, the matrix structure 1041 includes a light shielding structure 1041a, the long afterglow component 105 is disposed at any film layer between the pixel defining structure 1022 and the light shielding structure 1041a, and the distance between the long afterglow component 105 and the light shielding structure 1041a is greater than the designed distance.

[0117] Optionally, when the matrix structure 1041 is a shading structure 1041a, the distance between the long afterglow component 105 and the shading structure 1041a is greater than the designed distance, so that the light emitted by the long afterglow component 105 in the turned-on state can be emitted to the environment from the periphery of the shading structure 1041a.

[0118] In some embodiments, as Figure 7 As shown, the long afterglow component 105 is disposed on a side of the pixel defining structure 1022 away from the array substrate 101 , and the encapsulation layer 103 covers the long afterglow component 105 .

[0119] Optionally, the long afterglow component 105 is arranged on a side of the pixel defining structure 1022 away from the array substrate 101, between the pixel defining structure 1022 and the matrix structure 1041. The matrix structure 1041 includes a transparent structure or a shading structure 1041a. When the matrix structure 1041 is a transparent structure, the light emitted by the long afterglow component 105 in the turned-on state can pass through the transparent structure and be emitted into the environment. At this time, there is no requirement for the distance between the long afterglow component 105 and the transparent structure; when the matrix structure 1041 is a shading structure 1041a, according to the previous embodiment, the distance between the long afterglow component 105 and the shading structure 1041a is greater than the design distance.

[0120] Optionally, the long afterglow component 105 is arranged on the side of the pixel defining structure 1022 away from the array substrate 101, that is, the side close to the encapsulation layer 103, and the encapsulation layer 103 covers the long afterglow component 105, the pixel defining structure 1022 and the light-emitting unit 1021 of the light-emitting layer 102.

[0121] Alternatively, as Figure 3 As shown, the first area 1 is located in the display area 201 of the display panel 2 .

[0122] Optionally, the first area 1 is used to correspond to a fingerprint recognition device, a fingerprint recognition area of ​​a fingerprint recognition array film layer, or a design logo display area in the display area 201 .

[0123] Optionally, Figure 3 The texture in the first area 1 can represent the setting shape of the long afterglow component 105. Those skilled in the art can understand that the long afterglow component 105 can also be set to the fingerprint shape at the fingerprint recognition location, or to the logo shape at the design logo location, as well as other shapes, which does not affect the specific implementation of the present technology and will not be elaborated here.

[0124] Alternatively, as Figure 8 As shown, the orthographic projection of the long afterglow component 105 at the matrix structure 1041 is located within the shape of the matrix structure 1041 .

[0125] Alternatively, as Figure 8The fill colors are used to distinguish different structures in a top-down view. The light gray filled area represents the light-emitting unit 1021, and the dark gray filled area represents the portion of the matrix structure 1041 not blocked by the long-persistence component 105 in a top-down view. Those skilled in the art will understand that the long-persistence component 105, represented by the white area, includes the blocked portion of the matrix structure 1041.

[0126] Optionally, the orthographic projection of the long afterglow component 105 at the matrix structure 1041 is located within the shape of the matrix structure 1041, and a pixel defining structure 1022 is provided between the light emitting units 1021, and the pixel defining structure 1022 is not located within the matrix structure 1041. Figure 8 It is indicated in the figure, and those skilled in the art can understand its position. The positive projection of the matrix structure 1041 on the pixel defining structure 1022 is located within the shape of the pixel defining structure 1022, so the setting of the long afterglow component 105 will not affect the light-emitting unit 1021.

[0127] Based on the same inventive concept and matching the display panel 2 provided above in this application, an embodiment of this application provides a display device including the display panel 2 provided in this application.

[0128] Based on the same inventive concept and matching the display panel 2 provided above in this application, an embodiment of this application provides a control method for a display panel 2, which is used to control the display panel 2 provided in this application, including:

[0129] When the display panel 2 is in the display state, the long persistence component 105 is controlled to be in the closed state.

[0130] When the display panel 2 is in a non-display state, the long afterglow component 105 is controlled to be in an on state, so that the long afterglow component 105 in the on state absorbs and stores ambient light in a bright environment, and emits light to the environment in a dark environment.

[0131] Optionally, when the display panel 2 is in the display state, the long afterglow component 105 is controlled to be in the closed state, the electrochromic layer 1051 is opaque, and the long afterglow luminescent layer 1052 cannot emit light to the outside, which will not interfere with the display light of the display panel 2 in the display state.

[0132] Optionally, when the display panel 2 is in a non-display state, the long afterglow component 105 is controlled to be in an on state, the electrochromic layer 1051 appears transparent, and the long afterglow luminescent layer 1052 absorbs and stores ambient light in a bright environment in the on state, and emits light in a dark environment to indicate the position of the display device.

[0133] Based on the same inventive concept, and matching the display panel 2 provided above in this application, an embodiment of this application provides a method for preparing the display panel 2 provided in this application. The flow chart of this method is as follows: Figure 9 As shown, the method includes the following steps S901-S904:

[0134] S901 : preparing a pixel defining layer and a light emitting layer 102 on one side of an array substrate 101 , wherein the light emitting layer 102 includes light emitting units 1021 arranged in an array, and pixel defining structures 1022 of the pixel defining layer are disposed between the light emitting units 1021 .

[0135] S902 : preparing an encapsulation layer 103 on a side of the pixel defining layer and the light emitting layer 102 away from the array substrate 101 .

[0136] S903 : preparing a matrix layer 104 on a side of the encapsulation layer 103 away from the pixel defining structure 1022 . The matrix layer 104 includes matrix structures 1041 arranged in an array.

[0137] S904 : Disposing a long afterglow component 105 in the first region 1 of the display panel 2 and at any film layer on a side of the matrix structure 1041 away from the encapsulation layer 103 .

[0138] Alternatively, as Figure 4 The display panel 2 shown in FIG. 1 is provided with a film layer on a side of the matrix structure 1041 away from the encapsulation layer 103 as follows: Figure 5 The long persistence component 105 shown includes:

[0139] An initial light shielding structure 1041 a is prepared on a side of the matrix structure 1041 away from the encapsulation layer 103 .

[0140] A through hole is opened in the central region of the initial light-shielding structure 1041 a to obtain a ring-shaped light-shielding layer 1055 , with the matrix structure 1041 exposed in the central region.

[0141] In the through-holes and on the matrix structure 1041 , a long-lasting light-emitting layer 1052 is prepared by inkjet printing.

[0142] On the side of the long afterglow luminescent layer 1052 away from the matrix structure 1041 , a first electrode layer 1053 , a second electrode layer 1054 and an electrochromic layer 1051 are prepared, so that the first electrode layer 1053 and the second electrode layer 1054 are located on both sides of the electrochromic layer 1051 .

[0143] Optionally, on the side of the long afterglow luminescent layer 1052 away from the matrix structure 1041 , the first electrode layer 1053 , the electrochromic layer 1051 and the second electrode layer 1054 are sequentially prepared, or the second electrode layer 1054 , the electrochromic layer 1051 and the first electrode layer 1053 are sequentially prepared.

[0144] Optionally, the thickness of the first electrode layer 1053 is between 30 nm (nanometers) and 200 nm, and may be 30 nm or 200 nm. Optionally, the thickness of the second electrode layer 1054 is between 30 nm and 200 nm, and may be 30 nm or 200 nm.

[0145] Optionally, the thickness of the matrix structure 1041 is in the range of 1 μm (micrometer) to 2 μm, and may be 1 μm or 2 μm.

[0146] Alternatively, as Figure 6 In the display panel 2 shown, the matrix structure 1041 includes a light shielding structure 1041 a , and a groove is formed on a side of the light shielding structure 1041 a away from the encapsulation layer 103 ;

[0147] In the groove, a long-lasting luminescent layer 1052 is prepared by inkjet printing;

[0148] On the side of the long afterglow luminescent layer 1052 away from the bottom of the groove, a first electrode layer 1053 , a second electrode layer 1054 and an electrochromic layer 1051 are prepared, so that the first electrode layer 1053 and the second electrode layer 1054 are respectively located on both sides of the electrochromic layer 1051 .

[0149] Optionally, the thickness of the light-shielding structure 1041a is 1 μm-2 μm, and may be 1 μm or 2 μm. The thickness of the long-lasting luminescent layer 1052 is 100 nm-500 nm, and may be 100 nm or 500 nm. Based on the same inventive concept, and matching the display panel 2 provided above in this application, an embodiment of this application provides a method for preparing a display panel 2, which is used to prepare the display panel 2 provided in this application. The flow chart of this method is as follows: Figure 10 As shown, the method includes the following steps S1001-S1004.

[0150] S1001 : preparing a pixel defining layer and a light emitting layer 102 on one side of an array substrate 101 , wherein the light emitting layer 102 includes light emitting units 1021 arranged in an array, and pixel defining structures 1022 of the pixel defining layer are disposed between the light emitting units 1021 .

[0151] S1002 : Disposing a long afterglow component 105 on a side of the pixel defining structure 1022 away from the array substrate 101 .

[0152] Alternatively, as Figure 7The display panel 2 shown in FIG. 1 is provided with the following structure on the side of the pixel defining structure 1022 away from the array substrate 101: Figure 5 The long persistence component 105 shown includes.

[0153] An initial light shielding structure 1041 a is formed on a side of the pixel defining structure 1022 away from the array substrate 101 .

[0154] A through hole is opened in the central region of the initial light-shielding structure 1041 a to obtain a ring-shaped light-shielding layer 1055 , with the matrix structure 1041 exposed in the central region.

[0155] In the through-holes and on the matrix structure 1041 , a long-lasting light-emitting layer 1052 is prepared by inkjet printing.

[0156] On the side of the long afterglow luminescent layer 1052 away from the pixel defining structure 1022 , a first electrode layer 1053 , a second electrode layer 1054 and an electrochromic layer 1051 are prepared, so that the first electrode layer 1053 and the second electrode layer 1054 are respectively located on both sides of the electrochromic layer 1051 .

[0157] S1003 : preparing an encapsulation layer 103 on a side of the long afterglow component 105 , the pixel defining layer, and the light emitting layer 102 away from the array substrate 101 , wherein the encapsulation layer 103 covers the long afterglow component 105 .

[0158] S1004 : preparing a matrix layer 104 on a side of the encapsulation layer 103 away from the pixel defining structure 1022 . The matrix layer 104 includes matrix structures 1041 arranged in an array.

[0159] By applying the embodiments of the present application, at least the following beneficial effects can be achieved:

[0160] The display panel 2 provided in the embodiment of the present application includes a first area 1, and the first area 1 includes a long afterglow component 105. The long afterglow component 105 does not need to consume electrical energy of the device, and can emit light to the environment after absorbing light. The light emission is easy to observe in a dark environment.

[0161] Moreover, the long afterglow component 105 is in an open or closed state according to the state of the display panel 2, and can be closed when the display panel 2 is in the display state, ensuring that the display light of the display panel 2 is not disturbed. Specifically:

[0162] The display panel 2 provided in the embodiment of the present application includes a first area 1, and the first area 1 includes a long afterglow component 105. When the long afterglow component 105 is in the on state, it can absorb and store ambient light in a bright environment, and emit light to the environment in a dark environment. Therefore, the long afterglow component 105 does not consume the power of the device when emitting light, so that the device can emit indicative light in the dark state while ensuring that normal standby is not affected.

[0163] Furthermore, the long-lasting glow component 105 is disposed at any film layer on the side of the pixel defining structure 1022 away from the array substrate 101. When the display panel 2 is in the display state, it is in the closed state, ensuring that the light from the long-lasting glow component 105 is not emitted into the environment and does not interfere with the display light of the display panel 2 in the display state. The long-lasting glow component 105 of the present application does not affect the normal display of the display panel. When the display panel 2 is in the non-display state, the long-lasting glow component 105 is in the open state. In a bright environment, the display panel 2 does not need to emit indicator light (referring to light used to indicate the location of the display device to which the display panel belongs). The long-lasting glow component 105 absorbs ambient light and stores it. In a dark environment, when the display panel 2 needs to emit indicator light, the long-lasting glow component 105 emits indicator light into the environment based on the stored energy. This helps users quickly find and locate the display device to which the long-lasting glow component 105 belongs based on the indicator light, making it easier to find the display device in the non-display state in a dark environment. The state of the long-lasting glow component is organically integrated with the state of the display panel 2, which is beneficial to improving the user experience.

[0164] Those skilled in the art will appreciate that the steps, measures, and schemes in the various operations, methods, and processes discussed in this application may be interchanged, modified, combined, or deleted. Furthermore, other steps, measures, and schemes in the various operations, methods, and processes discussed in this application may also be interchanged, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and schemes in the prior art that are similar to those disclosed in this application may also be interchanged, modified, rearranged, decomposed, combined, or deleted.

[0165] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0166] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0167] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0168] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0169] It should be understood that although the steps in the flowcharts of the accompanying drawings are shown in sequence as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the flowcharts of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0170] The above description is only part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A display panel, characterized in that: The first region includes an array substrate, a light-emitting layer, an encapsulation layer, and a matrix layer that are stacked, and also includes a long afterglow component; The matrix layer includes a matrix structure arranged in an array, the light-emitting layer includes light-emitting units arranged in an array, pixel defining structures are provided between the light-emitting units, and the orthographic projection of the matrix structure on the array substrate is located within the orthographic projection range of the pixel defining structure on the array substrate; The long-persistence component is disposed at any film layer on a side of the pixel defining structure away from the array substrate, and is configured to be in a closed state when the display panel is in a display state, and in an open state when the display panel is in a non-display state, so that the long-persistence component in the open state absorbs and stores ambient light in a bright environment, and emits light to the environment in a dark environment; The bright state environment includes the display panel having visible light outside; the dark state environment includes the display panel having no visible light outside; When the long afterglow component is in the off state, the light in the environment cannot be absorbed by the long afterglow component, and the long afterglow component cannot emit light to the environment; External light can pass through the matrix layer and the packaging layer and act on the long afterglow component; light emitted by the long afterglow component can pass through the matrix layer and the packaging layer and be emitted into the environment.

2. The display panel according to claim 1, wherein: The long afterglow component comprises an electrochromic layer and a long afterglow luminescent layer which are stacked; The electrochromic layer is configured to be transparent in the on state, allowing ambient light to pass through and act on the long-afterglow luminescent layer, as well as light emitted through the long-afterglow luminescent layer to the environment; and to be opaque in the off state, preventing both ambient light and light emitted by the long-afterglow luminescent layer from passing through. The long afterglow luminescent layer is used to absorb and store ambient light in a bright state environment in the on state, and to emit light in a dark state environment.

3. The display panel according to claim 2, wherein: The long afterglow component further includes a first electrode layer, a second electrode layer and a light shielding layer; The first electrode layer and the second electrode layer are respectively arranged on both sides of the electrochromic layer, and the light shielding layer is arranged around the first electrode layer, the electrochromic layer, the second electrode layer and the long afterglow luminescent layer; The first electrode layer and the second electrode layer are used to enable the electrochromic layer to be in the on state or the off state, and the light shielding layer is used to prevent light from the long afterglow luminescent layer from passing through.

4. The display panel according to claim 1, wherein: The matrix structure includes a light-shielding structure, and the long afterglow component is arranged at any film layer on a side of the light-shielding structure away from the encapsulation layer.

5. The display panel according to claim 4, wherein: A groove is formed on a side of the light-shielding structure away from the packaging layer, and the long afterglow component is arranged in the groove.

6. The display panel according to claim 1, wherein: The matrix structure includes a light-transmitting structure, and the long-afterglow component is arranged at any film layer between the pixel defining structure and the light-transmitting structure.

7. The display panel according to claim 1, wherein: The matrix structure includes a light-shielding structure, the long-afterglow component is arranged at any film layer between the pixel defining structure and the light-shielding structure, and the distance between the long-afterglow component and the light-shielding structure is greater than a designed distance.

8. The display panel according to claim 6, wherein: The long afterglow component is arranged on a side of the pixel defining structure away from the array substrate, and the encapsulation layer covers the long afterglow component.

9. The display panel according to claim 1, wherein: Also includes at least one of the following: The first area is located in the display area of ​​the display panel; The first area is used to correspond to a fingerprint recognition device, a fingerprint recognition area of ​​a fingerprint recognition array film layer, or a design logo display area in the display area; The orthographic projection of the long afterglow component on the matrix structure is located within the shape of the matrix structure.

10. A display device, characterized in that: The display panel comprises the display panel as described in any one of claims 1 to 9.

11. A method for controlling a display panel, for controlling the display panel according to any one of claims 1 to 9, characterized in that: include: When the display panel is in a display state, controlling the long afterglow component to be in a closed state; When the display panel is in a non-display state, the long afterglow component is controlled to be in an on state, so that the long afterglow component in the on state absorbs and stores ambient light in a bright state environment, and emits light to the environment in a dark state environment.

12. A method for preparing a display panel, for preparing the display panel according to any one of claims 4 to 5, characterized in that: include: A pixel defining layer and a light-emitting layer are prepared on one side of the array substrate, wherein the light-emitting layer includes light-emitting units arranged in an array, and a pixel defining structure of the pixel defining layer is provided between the light-emitting units; preparing an encapsulation layer on a side of the pixel defining layer and the light emitting layer away from the array substrate; On a side of the encapsulation layer away from the pixel defining structure, a matrix layer is prepared, wherein the matrix layer includes a matrix structure arranged in an array; A long afterglow component is provided in the first area of ​​the display panel and at any film layer on a side of the matrix structure away from the encapsulation layer.

13. A method for preparing a display panel, for preparing the display panel according to claim 8, characterized in that: include: A pixel defining layer and a light-emitting layer are prepared on one side of the array substrate, wherein the light-emitting layer includes light-emitting units arranged in an array, and a pixel defining structure of the pixel defining layer is provided between the light-emitting units; A long afterglow component is provided on a side of the pixel defining structure away from the array substrate; preparing an encapsulation layer on a side of the long afterglow component, the pixel defining layer, and the light-emitting layer away from the array substrate, wherein the encapsulation layer covers the long afterglow component; A matrix layer is prepared on a side of the encapsulation layer away from the pixel defining structure, wherein the matrix layer includes a matrix structure arranged in an array.

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