Display panel and display device

Abstract

The invention relates to a display panel and a display device. The display panel includes: a substrate; the light-emitting units are arranged on the substrate, each light-emitting unit comprises a light-emitting device and a light conversion unit at least partially surrounding the periphery of the light-emitting device, the light conversion units are filled with light conversion materials, and the light conversion materials are used for carrying out wavelength conversion on light emitted from the light-emitting devices; and the light shielding unit is located between the light emitting unit and the substrate, the light shielding unit is connected with the light conversion unit, and the light shielding unit is used for containing the light conversion material. The manufacturing process of the display panel can be simplified, and the display effect of the display panel can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] Compared with LCD technology, micro light-emitting diode (Micro LED) display technology has performance advantages such as long life, high contrast, high brightness and fast response speed.

[0003] Currently, the production of Micro LED requires the use of mass transfer technology to transfer a large number of tiny LED chips from the growth substrate to the target driving substrate. The process is complex and cumbersome. The display effect of the Micro LED display device is also limited by the mass transfer technology and is difficult to improve. Summary of the invention

[0004] Based on this, it is necessary to provide a display panel and a display device, aiming to simplify the manufacturing process of the display panel and improve the display effect of the display panel.

[0005] In a first aspect, an embodiment of the present application provides a display panel, including:

[0006] substrate;

[0007] A plurality of light-emitting units are arranged on the substrate, the light-emitting units include a light-emitting device and a light-conversion unit at least partially surrounding the outer periphery of the light-emitting device, the light-conversion unit is filled with a light-conversion material, and the light-conversion material is used to convert the wavelength of light emitted from the light-emitting device;

[0008] The light shielding unit is located between the light emitting unit and the substrate, and is connected to the light conversion unit to accommodate the light conversion material.

[0009] In a second aspect, an embodiment of the present application further provides a display device, which includes the display panel provided in the first aspect.

[0010] The display panel provided in the embodiment of the present application is provided with a light conversion unit at least partially around the periphery of the light emitting device, and the light conversion unit is filled with a light conversion material, so that the light emitted from the light emitting device can be converted into light of different wavelengths and then emitted. A shading unit connected to the light conversion unit is also provided between the light emitting unit and the substrate. By adjusting the position of the light conversion material and the content of the light conversion material in the light conversion unit and the shading unit, a single light emitting unit can achieve full-color display, greatly reducing the number of mass transfers, simplifying the manufacturing process of the display panel, and reducing the size of a single pixel at the same time, which is conducive to improving the pixel density, thereby improving the display effect and achieving high PPI display. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1A schematic cross-sectional view of a display panel provided in an embodiment of the present application;

[0012] Figure 2 A schematic cross-sectional view of another display panel provided in an embodiment of the present application;

[0013] Figure 3 A schematic top view of a display panel provided in an embodiment of the present application;

[0014] Figure 4 A schematic cross-sectional view of another display panel provided in an embodiment of the present application;

[0015] Figure 5 A schematic top view of another display panel provided in an embodiment of the present application;

[0016] Figure 6 A schematic top view of another display panel provided in an embodiment of the present application;

[0017] Figure 7 A schematic cross-sectional view of another display panel provided in an embodiment of the present application;

[0018] Figure 8 A schematic cross-sectional view of another display panel provided in an embodiment of the present application;

[0019] Fig. 9 A schematic cross-sectional view of another display panel provided in an embodiment of the present application;

[0020] Fig.10 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0021] Reference numerals

[0022] 10-display panel; 11-substrate; 12-light emitting device; 131-first cavity; 141-first light conversion material; 132-second cavity; 142-second light conversion material; 133-third cavity; 143-third light conversion material; 15-separation structure; 161-first electrode; 162-second electrode; 163-third electrode; 164-fourth electrode; 165-fifth electrode; 166-sixth electrode; 171-first filter structure; 172-second filter structure; 173-third filter structure; 121-seventh electrode; 122 -light-emitting functional layer; 123-eighth electrode; 1221-first semiconductor layer; 1222-quantum well layer; 1223-second semiconductor layer; 134-fourth cavity; 1341-first sub-cavity; 1342-second sub-cavity; 1343-third sub-cavity; 181-first shading structure; 182-second shading structure; 183-third shading structure; 1821-first slot body; 1822-first opening; 1831-second slot body; 1832-second opening; 124-passivation layer; 184-fourth shading structure; 20-display device. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] When describing positional relationships, unless otherwise specified, when an element such as a layer, film, or substrate is referred to as being "on" another element, it can be directly on the other element or there may be intervening elements. Further, when a layer is referred to as being "under" another layer, it can be directly under or there may be one or more intervening elements. It is also understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or there may be one or more intervening elements.

[0026] In the case of using “including”, “having”, and “comprising” described herein, another component may be added unless a clear limiting term such as “only”, “consisting of”, etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as being one in number.

[0027] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the present application.

[0028] It should also be understood that when interpreting an element, even if not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of the specific value determined by those skilled in the art. For example, "approximately", "approximately" or "substantially" can mean within one or more standard deviations, which are not limited here.

[0029] Furthermore, in the specification, the phrase “planar distribution schematic diagram” refers to a drawing when a target portion is viewed from above, and the phrase “cross-sectional schematic diagram” refers to a drawing when a section taken by vertically cutting the target portion is viewed from the side.

[0030] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0031] As mentioned in the background technology section, the design and process capabilities of Micro LED display devices in related technologies are limited. The reason for the above phenomenon is that RGB full-color display requires multiple mass transfer processes, which are complex and cumbersome. At the same time, the number of pixels per inch (PPI) of Micro LED display is also limited by the limitations of mass transfer technology. In addition, the red light Micro LED chip has low luminous efficiency, which affects the overall display brightness of the display device.

[0032] Based on the above technical problems, the inventors have found that by arranging a light conversion unit filled with light conversion material on the periphery of the light emitting device, the wavelength of the light emitted by the light emitting device can be converted to achieve full-color display, thereby simplifying the manufacturing process of the display panel and improving the display effect of the display panel. Based on this, the inventors further studied the technical solution of the embodiment of the present application. Specifically, the display panel provided by the embodiment of the present application includes a substrate, a plurality of light emitting units arranged on the substrate, the light emitting unit includes a light emitting device and a light conversion unit at least partially surrounding the periphery of the light emitting device, the light conversion unit is filled with a light conversion material, and the light conversion material is used to convert the wavelength of the light emitted from the light emitting device; a shading unit located between the light emitting unit and the substrate, the shading unit is connected to the light conversion unit, and is used to accommodate the light conversion material. With the above technical solution, by surrounding the light conversion unit filled with light conversion material around the periphery of the light emitting device, the wavelength conversion effect of the light conversion material is utilized, so that the light emitted from the light emitting device can be converted into light of different wavelengths, and by adjusting the position of the light conversion material and the content of the light conversion material in the light conversion unit and the shading unit, full-color display can be achieved. Therefore, the manufacturing process of the display panel can be simplified and the display effect of the display panel can be improved.

[0033] The above is the core idea of ​​this application. The technical solutions in the embodiments of this application will be described clearly and completely below in conjunction with the drawings in the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] Figure 1 A schematic cross-sectional view of a display panel provided in an embodiment of the present application; Figure 2 A schematic cross-sectional view of another display panel provided in an embodiment of the present application; Figure 3 A schematic top view of a display panel provided in an embodiment of the present application; Figure 4 A schematic cross-sectional view of another display panel provided in an embodiment of the present application; Figure 5 A schematic top view of another display panel provided in an embodiment of the present application; Figure 6 A schematic top view of another display panel provided in an embodiment of the present application; Figure 7 A schematic cross-sectional view of another display panel provided in an embodiment of the present application; Figure 8 A schematic cross-sectional view of another display panel provided in an embodiment of the present application; Fig. 9 A schematic cross-sectional view of another display panel provided in an embodiment of the present application.

[0035] Combination Figure 1 to Figure 9As shown, the display panel provided by the embodiment of the present application includes: a substrate 11; a plurality of light-emitting units arranged on the substrate 11, the light-emitting unit including a light-emitting device 12 and a light conversion unit at least partially surrounding the periphery of the light-emitting device 12, the light conversion unit is filled with a light conversion material, and the light conversion material is used to convert the wavelength of light emitted from the light-emitting device 12; a shading unit located between the light-emitting unit and the substrate 11, the shading unit is connected to the light conversion unit, and is used to accommodate the light conversion material.

[0036] In the embodiments of the present application, Figure 1 to Figure 9 As shown, at least part of the periphery of the light-emitting device 12 is surrounded by a light conversion unit, and the light conversion unit is filled with a light conversion material, so that the light emitted from the light-emitting device 12 can be converted into light of different wavelengths by the light conversion material and then emitted. There is also a shading unit connected to the light conversion unit between the light-emitting unit and the substrate 11, and the shading unit can accommodate the light conversion material and block it. By adjusting the position of the light conversion material and the content of the light conversion material in the light conversion unit and the shading unit, a single light-emitting unit can achieve full-color display, which greatly reduces the number of mass transfers and simplifies the manufacturing process of the display panel. At the same time, a single pixel in the related art includes three sub-pixels of different colors, each sub-pixel corresponds to a light-emitting unit, and three light-emitting units are required to achieve full-color display, while a single pixel in the embodiment of the present application only includes one light-emitting unit to achieve full-color display, which reduces the size of a single pixel, is conducive to improving pixel density, thereby improving display effect and achieving high PPI display.

[0037] Among them, the light-emitting device 12 can be a light-emitting diode (LED), and further, the light-emitting device 12 can be a micro light-emitting diode (Micro LED) or a sub-millimeter light-emitting diode (Mini LED); according to the packaging structure, the light-emitting device 12 can be a flip-chip LED, a face-mounted LED or a vertical LED, which is only used as an example here and is not specifically limited.

[0038] Furthermore, the wavelength range of the light emitted by the light-emitting device 12 is between 100nm and 400nm, which is the ultraviolet light band. It can not only excite the light conversion material to perform wavelength conversion, but the ultraviolet light itself is invisible. If the wavelength range of the light emitted by the light-emitting device 12 is a visible light band such as blue light, taking the light emitted by the light-emitting device 12 as blue light as an example, when it is not necessary to emit blue light but light of other bands, even if the light conversion material is completely blocked by the shading unit, the blue light emitted by the light-emitting device 12 will still pass through, and full-color display cannot be achieved.

[0039] Furthermore, combined with Figure 1 to Figure 9 As shown, at least part of the light conversion unit surrounds the side of the light emitting device 12, which can reduce the thickness of the display panel and is conducive to realizing a thinner display panel.

[0040] As a possible implementation, combining Figure 1 to Figure 9 As shown, the light conversion unit includes a first sub-conversion unit, a second sub-conversion unit and a third sub-conversion unit; the first sub-conversion unit includes a first cavity 131, the first cavity 131 is filled with a first light conversion material 141, and the first light conversion material 141 is used to convert the light emitted from the light emitting device 12 into visible light with a first wavelength; the second sub-conversion unit includes a second cavity 132, the second cavity 132 is filled with a second light conversion material 142, and the second light conversion material 142 is used to convert the light emitted from the light emitting device 12 into visible light with a second wavelength; the third sub-conversion unit includes a third cavity 133, the third cavity 133 is filled with a third light conversion material 143, and the third light conversion material 143 is used to convert the light emitted from the light emitting device 12 into visible light with a third wavelength; the wavelength ranges of the first wavelength, the second wavelength and the third wavelength do not overlap.

[0041] Based on this, combined Figure 1 to Figure 9 As shown, at least part of the periphery of the light-emitting device 12 is surrounded by a first cavity 131, a second cavity 132 and a third cavity 133, which are respectively filled with different light conversion materials, so that the light emitted from the light-emitting device 12 can be converted into three kinds of light with non-overlapping wavelength ranges by the first light conversion material 141, the second light conversion material 142 and the third light conversion material 143 respectively. By adjusting the content of the first light conversion material 141 in the first cavity 131, the second light conversion material 142 in the second cavity 132 and the third light conversion material 143 in the third cavity 133, the three kinds of light obtained by conversion can be mixed in different proportions, so as to realize full-color display, which is conducive to further reducing the size of pixels, improving pixel density, and further realizing high PPI display.

[0042] In addition, by controlling the content of the light conversion material filled in the cavity, the brightness of the light obtained by the light conversion material conversion can be controlled. Taking the first cavity 131 filled with the first light conversion material 141 as an example, if the content of the first light conversion material 141 in the first cavity 131 is small, a small portion of the light emitted by the light emitting device 12 can be converted into light with the first wavelength by the first light conversion material 141 and emitted, and the brightness of the light with the first wavelength obtained is also low; by increasing the content of the first light conversion material 141 in the first cavity 131, more of the light emitted by the light emitting device 12 can be converted into light with the first wavelength by the first light conversion material 141, thereby enhancing the brightness of the light with the first wavelength. The second cavity 132 and the third cavity 133 are similar, and will not be repeated here.

[0043] Exemplarily, the first light conversion material 141, the second light conversion material 142, and the third light conversion material 143 can convert the light emitted by the light emitting device 12 into red light, green light, and blue light, respectively, to achieve full-color display. The embodiment of the present application does not limit whether the first light conversion material 141, the second light conversion material 142, and the third light conversion material 143 can convert the light emitted by the light emitting device 12 into light with a wavelength range of red light, light with a wavelength range of green light, or light with a wavelength range of blue light, as long as the three light conversion materials can convert the light emitted by the light emitting device 12 into red light, green light, and blue light, respectively.

[0044] For example, when the first light conversion material 141 converts the light emitted by the light emitting device 12 into red light, the second light conversion material 142 may convert the light emitted by the light emitting device 12 into green light, and the third light conversion material 143 may convert the light emitted by the light emitting device 12 into blue light, or the second light conversion material 142 may convert the light emitted by the light emitting device 12 into blue light, and the third light conversion material 143 may convert the light emitted by the light emitting device 12 into green light; or, when the first light conversion material 141 converts the light emitted by the light emitting device 12 into green light, the second light conversion material 142 may convert the light emitted by the light emitting device 12 into red light, and the third light conversion material 143 may convert the light emitted by the light emitting device 12 into blue light. The light emitted by the light-emitting device 12 may be converted into blue light, or the second light conversion material 142 may convert the light emitted by the light-emitting device 12 into blue light, and the third light conversion material 143 may convert the light emitted by the light-emitting device 12 into red light; alternatively, when the first light conversion material 141 converts the light emitted by the light-emitting device 12 into blue light, the second light conversion material 142 may convert the light emitted by the light-emitting device 12 into green light, and the third light conversion material 143 may convert the light emitted by the light-emitting device 12 into red light, or the second light conversion material 142 may convert the light emitted by the light-emitting device 12 into red light, and the third light conversion material 143 may convert the light emitted by the light-emitting device 12 into green light. This is only an example and is not specifically limited.

[0045] In some examples, combined Figure 1~Figure 3 As shown, the first cavity 131 , the second cavity 132 and the third cavity 133 are connected end to end in sequence and surround the outer periphery of the light emitting device 12 .

[0046] Based on this, combined Figure 1~Figure 3As shown, the first cavity 131, the second cavity 132 and the third cavity 133 arranged on the outside of the light-emitting device 12 can be connected end to end in sequence to form a ring column shape, so that the light emitted from the side of the light-emitting device 12 can be converted into light with non-overlapping wavelength ranges by the first light conversion material 141, the second light conversion material 142 and the third light conversion material 143 filled in the first cavity 131, the second cavity 132 and the third cavity 133, respectively, and mixed, and by adjusting the content of different light conversion materials filled in the first cavity 131, the second cavity 132 and the third cavity 133, full-color display is achieved.

[0047] In some examples, combined Figure 4~Figure 9 As shown, the first cavity 131 surrounds at least part of the periphery of the light-emitting device 12 ; the second cavity 132 surrounds at least part of the periphery of the first cavity 131 away from the light-emitting device 12 ; and the third cavity 133 surrounds the side of the second cavity 132 away from the light-emitting device 12 .

[0048] Based on this, combined Figure 4~Figure 9 As shown, the first cavity 131, the second cavity 132 and the third cavity 133 arranged on the outside of the light-emitting device 12 can all be annular column shapes and nested in sequence, so that the light emitted from the side of the light-emitting device 12 can be converted into light with non-overlapping wavelength ranges by the first light conversion material 141, the second light conversion material 142 and the third light conversion material 143 filled in the first cavity 131, the second cavity 132 and the third cavity 133, respectively, and mixed, and by adjusting the content of different light conversion materials filled in the first cavity 131, the second cavity 132 and the third cavity 133, full-color display can be achieved.

[0049] For example, Figure 5 As shown, when the first cavity 131, the second cavity 132 and the third cavity 133 are in the shape of annular columns nested in sequence, the first cavity 131, the second cavity 132 and the third cavity 133 can be in the shape of a complete annular column, and by adjusting the content of the light conversion material in the cavity, the light emitted from the light emitting device 12 can pass through the first cavity 131 on the inner side and be absorbed by the light conversion material filled in the second cavity 132 and the third cavity 133 on the outer side and undergo wavelength conversion, so as to achieve full-color display; or, as Figure 6As shown, when the first cavity 131, the second cavity 132 and the third cavity 133 are in the shape of an annular column nested in sequence, a partition structure 15 may also be provided in the first cavity 131 and the second cavity 132, and the partition structure 15 is not filled with light conversion material, so that the light emitted from the light emitting device 12 can pass through the partition structure 15 through the inner first cavity 131 to the second cavity 132 located in the middle position, and pass through the partition structure 15 through the inner first cavity 131 and the second cavity 132 to the outer third cavity 133, so as to achieve full-color display. The number, shape and position of the partition structure 15 can be set and adjusted according to actual conditions, and the embodiment of the present application is not limited to this.

[0050] In some examples, the light conversion material may include a quantum dot material, which is small in size and has a quantum confinement effect. After a certain light pressure is applied, the quantum dot material will emit light of a specific wavelength, and the wavelength of the emitted light will change with the change in the size of the quantum dot material. Therefore, the wavelength of the emitted light can be controlled by changing the size of the quantum dot material. Exemplarily, the first light conversion material 141, the second light conversion material 142, and the third light conversion material 143 can be quantum dot materials of different sizes. Further, the size of the quantum dot material emitting red light is larger than the size of the quantum dot material emitting green light, and the size of the quantum dot material emitting green light is larger than the size of the quantum dot material emitting blue light, so that the light emitted from the light emitting device 12 can be converted in wavelength by quantum dot materials of different sizes, emitting red light, green light, and blue light to achieve full-color display.

[0051] Exemplarily, the embodiment of the present application does not limit the type of quantum dot material selected by the first light conversion material 141, the second light conversion material 142, and the third light conversion material 143. The first light conversion material 141, the second light conversion material 142, and the third light conversion material 143 can be the same quantum dot material, or different types of quantum dot materials. For example, the first light conversion material 141, the second light conversion material 142, and the third light conversion material 143 can include one or more of cadmium selenide (CdSe) quantum dot material, indium phosphide (InP) quantum dot material, cadmium sulfide (CdS) quantum dot material, lead sulfide (PbS) quantum dot material, etc., which are only examples here and are not specifically limited.

[0052] Furthermore, the photoconversion material may include a magnetic quantum dot material, which is movable under the action of an electric field, so that the photoconversion material can change its position under the regulation of the electric field to achieve the purpose of controlling the content of the photoconversion material in the cavity, thereby further realizing full-color display.

[0053] As a possible implementation, combining Figure 1 to Figure 9As shown, the first sub-conversion unit also includes a first electrode 161 arranged on a side of the first cavity 131 away from the substrate 11, and a second electrode 162 arranged on a side of the first cavity 131 close to the substrate 11; the second sub-conversion unit also includes a third electrode 163 arranged on a side of the second cavity 132 away from the substrate 11, and a fourth electrode 164 arranged on a side of the second cavity 132 close to the substrate 11; the third sub-conversion unit also includes a fifth electrode 165 arranged on a side of the third cavity 133 away from the substrate 11, and a sixth electrode 166 arranged on a side of the third cavity 133 close to the substrate 11.

[0054] Furthermore, the light conversion material may include a quantum dot material with magnetism, and each sub-conversion unit is provided with two electrodes. Under the action of the electric field formed by the two electrodes, the quantum dot material with magnetism can move, so that the position and content of the light conversion material filled in the cavity can be controlled by adjusting the intensity and direction of the electric field, thereby achieving full-color display. Figure 1 to Figure 9 As shown, taking the first sub-conversion unit as an example, if the first electrode 161 and the second electrode 162 have the same electrical properties, the first electrode 161 and the second electrode 162 repel each other, and the first light conversion material 141 is evenly dispersed in the first cavity 131; if the first electrode 161 and the second electrode 162 have opposite electrical properties, the first light conversion material 141 can be gathered near the first electrode 161 or the second electrode 162, and by setting the direction of the electric field, when it is not necessary to emit light through the first sub-conversion unit, the first light conversion material 141 can be shielded by the shading unit. The second and third sub-conversion units are the same, and will not be repeated here.

[0055] Exemplarily, the first cavity 131, the second cavity 132 or the third cavity 133 is formed of an organic material or an inorganic material. In a specific implementation, the inorganic material or the organic material can be formed into a cavity by etching, and then the light conversion material is filled into the cavity. Among them, the inorganic material may include one or more of silicon oxide, silicon nitrogen, etc., which is only used as an example and is not specifically limited. In addition, the materials forming the first cavity 131, the second cavity 132 or the third cavity 133 may be the same or different, and the embodiments of the present application are not limited to this.

[0056] In some examples, light emitted after wavelength conversion by the light conversion material can be emitted from the side away from the substrate 11, that is, emitted from the forward direction of the light emitting device 12. Compared with emitting light from the side of the light emitting device 12, the light emitted from the forward direction of the light emitting device 12 generates less optical crosstalk.

[0057] Furthermore, a reflective layer (not shown in the figure) may be provided on the outside of the cavity to reflect the light converted in wavelength by the light conversion material in a direction away from the substrate 11, so that more light can be emitted from the forward direction of the light emitting device 12, which is beneficial to improve the display brightness of the display panel. Exemplarily, when the first cavity 131, the second cavity 132 and the third cavity 133 are connected end to end in sequence and surround the periphery of the light emitting device 12, the reflective layer may be provided on the side of the first cavity 131 away from the light emitting device 12, the side of the second cavity 132 away from the light emitting device 12 and the side of the third cavity 133 away from the light emitting device 12; when the first cavity 131, the second cavity 132 and the third cavity 133 are nested in sequence on the outside of the light emitting device 12, the reflective layer may be provided on the side of the third cavity 133 away from the second cavity 132.

[0058] In some examples, combined Figure 1 to Figure 9 As shown, the light-emitting unit also includes a first filter structure 171, a second filter structure 172 and a third filter structure 173. The first filter structure 171 covers the side of the second cavity 132 away from the substrate 11, the second filter structure 172 covers the side of the third cavity 133 away from the substrate 11, and the third filter structure 173 covers the side of the third cavity 133 away from the substrate 11.

[0059] Based on this, combined Figure 1 to Figure 9 As shown, a filter structure can be set on the side of the first cavity 131, the second cavity 132 and the third cavity 133 away from the substrate 11, and only light of a specific wavelength range is allowed to pass through, so that the light converted by the light conversion material can be emitted through the filter structure, and the light not converted by the light conversion material is blocked, which is conducive to further realizing full-color display and further improving the display effect. For example, the first filter structure 171 can only allow light with a first wavelength to pass through, the second filter structure 172 can only allow light with a second wavelength to pass through, and the third filter structure 173 can only allow light with a third wavelength to pass through.

[0060] Furthermore, combined with Figure 1 to Figure 9 As shown, the filter structure is located on the side of the cavity away from the substrate 11, and a space is reserved for the electrode on the side of the cavity away from the substrate 11 to facilitate the connection between the electrode and other wirings.

[0061] For example, the shapes, sizes and positions of the first electrode 161, the third electrode 163 and the fifth electrode 165 on the corresponding filter structure can be adjusted according to actual needs. Figures 1 to 9 This is only an example and is not limited to the embodiments of the present application.

[0062] As a possible implementation, combining Figure 1~Figure 3 , Figure 4 , Figure 7~Figure 9 As shown, the light-emitting device 12 includes a seventh electrode 121, a light-emitting functional layer 122 and an eighth electrode 123 stacked along the thickness direction of the substrate 11, wherein the seventh electrode 121 and the eighth electrode 123 can be used to control the light-emitting functional layer 122, and the light-emitting functional layer 122 may include a stacked first semiconductor layer 1221, a quantum well layer 1222 and a second semiconductor layer 1223.

[0063] In some examples, combined Figure 1 to Figure 9 As shown, along the thickness direction of the substrate 11, the orthographic projection of the eighth electrode 123 on the surface of the substrate 11 can cover the orthographic projection of the light-emitting functional layer 122 on the surface of the substrate 11, that is, the eighth electrode 123 can completely cover the forward light-emitting surface of the light-emitting device 12, so that the light emitted by the light-emitting functional layer 122 can be emitted to the side light conversion unit for wavelength conversion, which is conducive to further realizing full-color display.

[0064] Exemplarily, the eighth electrode 123 may be made of a metal material with high reflectivity, so that more light can be emitted from the side of the light-emitting functional layer 122, which is conducive to further realizing full-color display. For example, the eighth electrode 123 may be made of at least one or more of gold (Au), platinum (Pt), silver (Ag), copper (Cu), etc., which is only used as an example and is not specifically limited.

[0065] In some examples, combined Figure 1~Figure 3 , Figure 4 , Figure 7~Figure 9 As shown, along the thickness direction of the substrate 11, the orthographic projection area of ​​the seventh electrode 121 on the surface of the substrate 11 is smaller than the orthographic projection area of ​​the light-emitting functional layer 122; the shading unit includes a fourth cavity 134 located between the light-emitting functional layer 122 and the substrate 11, and the fourth cavity 134 is arranged around at least part of the periphery of the seventh electrode 121; the fourth cavity 134 is at least connected to the first cavity 131.

[0066] Based on this, the projection area of ​​the seventh electrode 121 on the substrate 11 is smaller than the projection area of ​​the light-emitting functional layer 122 on the substrate 11, so that the space of the fourth cavity 134 can be reserved around the seventh electrode 121; the fourth cavity 134 is at least connected to the first cavity 131 and is shielded by the light-emitting functional layer 122, so that the position of the first light conversion material 141 can be regulated by the connected fourth cavity 134 and the first cavity 131, which is conducive to further realizing full-color display, and at the same time further reducing the size of the pixel, which is conducive to further improving the pixel density, thereby further improving the display effect and realizing a higher PPI display. For example, when the wavelength conversion through the first light conversion material 141 is not required, the first light conversion material 141 can be gathered in the fourth cavity 134 and will not be excited by the light emitted by the light-emitting device 12; when a part of the first light conversion material 141 needs to be dispersed in the first cavity 131, the remaining first light conversion material 141 can be located in the fourth cavity 134 and will not be excited by the light emitted by the light-emitting device 12.

[0067] It should be noted that the “cavity” mentioned in the embodiment of the present application is a general term for the first cavity 131 , the second cavity 132 and the third cavity 133 , and does not refer to the fourth cavity 134 .

[0068] In some examples, combined Figure 1~Figure 3 As shown, the fourth cavity 134 includes a first sub-cavity 1341, a second sub-cavity 1342 and a third sub-cavity 1343 which are connected end to end in sequence, the first sub-cavity 1341 is connected to the first cavity 131, the second sub-cavity 1342 is connected to the second cavity 132, and the third sub-cavity 1343 is connected to the third cavity 133.

[0069] Based on this, combined Figure 1~Figure 3 As shown, when the first cavity 131, the second cavity 132 and the third cavity 133 are connected end to end in sequence and surround the periphery of the light-emitting device 12, the fourth cavity 134 can also be divided into three sub-cavities connected end to end in sequence, and the three sub-cavities are respectively connected to the first cavity 131, the second cavity 132 and the third cavity 133, so that the position of the first light conversion material 141 can be regulated by the connected first sub-cavity 1341 and the first cavity 131, the position of the second light conversion material 142 can be regulated by the connected second sub-cavity 1342 and the second cavity 132, and the position of the third light conversion material 143 can be regulated by the connected third sub-cavity 1343 and the third cavity 133, so that the positions of the three light conversion materials and the contents in the corresponding cavities can be freely regulated, which is conducive to further realizing full-color display and further improving the display effect.

[0070] In some examples, combined Figure 1~Figure 3As shown, the second electrode 162 is located between the first sub-cavity 1341 and the substrate 11 , the fourth electrode 164 is located between the second sub-cavity 1342 and the substrate 11 , and the sixth electrode 166 is located between the third sub-cavity 1343 and the substrate 11 .

[0071] Based on this, combined Figure 1~Figure 3 As shown, one of the two electrodes corresponding to the cavity can be set on the side of the connected sub-cavity close to the substrate 11. When the two electrodes corresponding to the cavity are electrically opposite, by setting the direction of the electric field, at least part of the light conversion material filled in the cavity can be gathered near the electrode located on one side of the connected sub-cavity, and will not be excited by the light emitted by the light-emitting device 12, which is conducive to further realizing full-color display and further improving the display effect. Taking the first sub-conversion unit as an example, the second electrode 162 can be set on the side of the first sub-cavity 1341 close to the substrate 11. When the electrical properties of the first electrode 161 and the second electrode 162 are opposite, by setting the direction of the electric field, at least part of the first light conversion material 141 can be gathered near the second electrode 162 located on one side of the first sub-cavity 1341, and will not be excited by the light emitted by the light-emitting device 12. The second sub-conversion unit and the third sub-conversion unit are similar, and will not be repeated here.

[0072] In some examples, combined Figure 1 to Figure 9 As shown, along the thickness direction of the substrate 11, the orthographic projection of the light-emitting functional layer 122 on the substrate 11 can completely cover the orthographic projections of the second electrode 162, the fourth electrode 164 and the sixth electrode 166 on the substrate 11, that is, along the direction parallel to the surface of the substrate 11, the second electrode 162, the fourth electrode 164 and the sixth electrode 166 away from the first electrode 161 will not exceed the light-emitting functional layer 122, so as to prevent the light-conversion material from gathering near the second electrode 162, the fourth electrode 164 and the sixth electrode 166 under the action of the electric field, and part of the light-conversion material is not blocked by the light-emitting functional layer 122, resulting in partial light leakage.

[0073] As a possible implementation, combining Figure 1 to Figure 9 As shown, the shading unit also includes a shading structure, which includes a first shading structure 181, a second shading structure 182 and a third shading structure 183. The first shading structure 181 is located between the first cavity 131 and the substrate 11, the second shading structure 182 is located between the second cavity 132 and the substrate 11, and the third shading structure 183 is located between the third cavity 133 and the substrate 11.

[0074] Based on this, combined Figure 1 to Figure 9As shown, a first light shielding structure 181 is disposed between the first cavity 131 and the substrate 11, a second light shielding structure 182 is disposed between the second cavity 132 and the substrate 11, and a third light shielding structure 183 is disposed between the third cavity 133 and the substrate 11, which can reduce reflectivity and improve display effect.

[0075] Exemplarily, the first light shielding structure 181, the second light shielding structure 182 and the third light shielding structure 183 can be black light shielding structures. In terms of materials, the materials of the first light shielding structure 181, the second light shielding structure 182 and the third light shielding structure 183 can include inorganic materials and / or organic materials. For example, the first light shielding structure 181, the second light shielding structure 182 and the third light shielding structure 183 can include at least one or more of a carbon black glue layer, a black dye glue layer, black aluminum oxide, a black organic solvent, etc., which are only examples and are not specifically limited. In addition, the first light shielding structure 181, the second light shielding structure 182 and the third light shielding structure 183 can be the same or different.

[0076] In some examples, combined Figure 4 , Figure 7~Figure 9 As shown, when the first cavity 131 , the second cavity 132 and the third cavity 133 are in the shape of annular columns nested in sequence, the second shading structure 182 covers the side of the fourth electrode 164 away from the substrate 11 , and the third shading structure 183 covers the side of the sixth electrode 166 away from the substrate 11 .

[0077] Combination Figure 4 , Figure 7~Figure 9As shown, at this time, the fourth cavity 134 can be connected only to the first cavity 131, and the second electrode 162 is arranged on the side of the fourth cavity 134 close to the substrate 11, so that when the electrical properties of the first electrode 161 and the second electrode 162 are opposite, by setting the direction of the electric field, at least part of the first light conversion material 141 can be gathered near the second electrode 162 located on one side of the fourth cavity 134, and will not be excited by the light emitted by the light-emitting device 12. At the same time, a fourth electrode 164 and a second shading structure 182 are provided on a side of the second cavity 132 close to the substrate, and the second shading structure 182 covers a side of the fourth electrode 164 away from the substrate 11, so that when the electrical properties of the third electrode 163 and the fourth electrode 164 are opposite, by setting the direction of the electric field, at least part of the second light conversion material 142 can be gathered near the fourth electrode 164 and blocked by the second shading structure 182, and will not be excited by the light emitted by the light-emitting device 12; similarly, a sixth electrode 166 and a third shading structure 183 are provided on a side of the third cavity 133 close to the substrate 11, and the third shading structure 183 covers a side of the sixth electrode 166 away from the substrate 11, so that when the electrical properties of the fifth electrode 165 and the sixth electrode 166 are opposite, by setting the direction of the electric field, at least part of the third light conversion material 143 can be gathered near the fourth electrode 164 and blocked by the third shading structure 183, and will not be excited by the light emitted by the light-emitting device 12. Based on this, under the action of the electric field, the position of the light conversion material can be regulated by using the cooperation of the cavity and the shading unit, which is conducive to further realizing full-color display and further improving the display effect.

[0078] For example, the shapes, sizes and positions of the second electrode 162, the fourth electrode 164 and the sixth electrode 166 relative to the corresponding light shielding structures can be adjusted according to actual needs. Figures 1 to 9 It is only an example and is not limited to this embodiment of the present application.

[0079] Furthermore, combined with Figure 4 and Figure 7 As shown, when the first cavity 131 , the second cavity 132 and the third cavity 133 are in the shape of annular columns nested in sequence, the material of the second light shielding structure 182 and the third light shielding structure 183 may include a black organic solvent.

[0080] In addition to the light conversion material, the cavity is also filled with a solution or glue as a solvent for the light conversion material, which facilitates the movement of the light conversion material in the cavity. The second light shielding structure 182 and the third light shielding structure 183 and the solvent in the cavity are two different substances and are incompatible with each other, so that the second light shielding structure 182 and the third light shielding structure 183 can be separated from the solvent in the cavity. Figure 7As shown, when an electric field is applied, the second light conversion material 142 can be moved to the vicinity of the fourth electrode 164 and covered by the second shading structure 182, so that it will not be excited by the light emitted by the light-emitting device 12; similarly, when an electric field is applied, the third light conversion material 143 can be moved to the vicinity of the sixth electrode 166 and covered by the third shading structure 183, so that it will not be excited by the light emitted by the light-emitting device 12; so as to achieve the regulation of the position of the light conversion material, which is conducive to further realizing full-color display and further improving the display effect.

[0081] In some examples, combined Figure 8~Figure 9 As shown, when the first cavity 131, the second cavity 132 and the third cavity 133 are in the shape of annular columns nested in sequence, a first groove 1821 may be provided between the second light-shielding structure 182 and the fourth electrode 164, the second light-shielding structure 182 covering the fourth electrode 164 is provided with a first opening 1822, and the second cavity 132 is connected to the first groove 1821 through the first opening 1822; a second groove 1831 may be provided between the third light-shielding structure 183 and the sixth electrode 166, the third light-shielding structure 183 covering the sixth electrode 166 is provided with a second opening 1832, and the third cavity 133 is connected to the second groove 1831 through the second opening 1832.

[0082] Combination Figure 8~Figure 9 As shown, at this time, the materials of the second shading structure 182 and the third shading structure 183 may include inorganic materials such as black aluminum oxide. At this time, the second shading structure 182 and the fourth electrode 164 are hollow and have a first opening 1822; when the electrical properties of the third electrode 163 and the fourth electrode 164 are opposite, by setting the direction of the electric field, at least part of the second light conversion material 142 located in the second cavity 132 can enter the first slot 1821 through the first opening 1822, gather near the fourth electrode 164, and be blocked by the second shading structure 182, and will not be excited by the light emitted by the light emitting device 12; similarly, the third shading structure 183 and the sixth electrode 166 It is also hollow in design and has a second opening 1832. When the electrical properties of the fifth electrode 165 and the sixth electrode 166 are opposite, by setting the direction of the electric field, at least part of the third light conversion material 143 located in the third cavity 133 can enter the second groove 1831 through the second opening 1832, gather near the sixth electrode 166, and be blocked by the third shading structure 183, and will not be excited by the light emitted by the light-emitting device 12; so as to realize the regulation of the position of the light conversion material, which is conducive to further realizing full-color display and further improving the display effect.

[0083] In some examples, combined Figure 1~Figure 3 , Figure 4 , Figure 7~Figure 9As shown, the light emitting device 12 is also covered with a passivation layer 124, which covers at least one side of the light emitting functional layer close to the light conversion unit, one side of the light emitting functional layer 122 close to the fourth cavity 134, and one side of the seventh electrode 121 close to the fourth cavity 134, and can protect the light emitting device 12. Exemplarily, the passivation layer 124 may include at least one or more of silicon nitride, silicon oxide, and aluminum oxide, which is only used as an example and is not specifically limited.

[0084] Further, the side of the light-emitting functional layer 122 close to the eighth electrode 123 is not provided with a passivation layer 124, or, as Figure 1~Figure 3 , Figure 4 , Figure 7~Figure 9 As shown, a functional layer having an opening is provided on one side of the light-emitting functional layer 122 close to the eighth electrode 123 , so that the eighth electrode 123 can be electrically connected to the light-emitting functional layer 122 .

[0085] In some examples, such as Figure 1~Figure 3 , Figure 4 , Figure 7~Figure 9 As shown, the display panel also includes a fourth shading structure 184, which covers at least one side of the light-emitting functional layer 122 and the seventh electrode 121 close to the fourth cavity 134, thereby reducing the reflectivity and further shielding the light conversion material in the fourth cavity 134, which is conducive to further realizing full-color display and further improving the display effect.

[0086] Exemplarily, the fourth light-shielding structure 184 may be a black light-shielding structure, and the material of the fourth light-shielding structure 184 may include one or more inorganic materials and / or organic materials, which is not limited in this embodiment of the present application.

[0087] In addition, the embodiments of the present application provide Figure 1 , Figure 4 and Figure 8 is a cross-sectional schematic diagram when the light-emitting unit is in a light-emitting state, Figure 2 , Figure 7 and Fig. 9 It is a cross-sectional schematic diagram when the light-emitting unit is in a non-light-emitting state. In addition to the light-emitting state and the non-light-emitting state, the light-emitting unit can also have an intermediate state. At this time, at least part of the light-conversion material is dispersed in the corresponding cavity, and at least part of the light-conversion material is blocked by the shading unit.

[0088] Based on the same application concept, an embodiment of the present application also provides a display device. Fig.10 A schematic diagram of the structure of a display device 20 provided in an embodiment of the present application is shown in FIG. Fig.10 As shown, the display device 20 includes the display panel 10 in any of the above embodiments. Fig.10As shown, the display device 20 includes a display panel 10. Therefore, the display device 20 also has the beneficial effects of the display panel 10 in the above embodiment, and the similarities can be understood by referring to the above explanation of the display panel 10, which will not be repeated below.

[0089] The display device 20 provided in the embodiment of the present application can be Fig.10 The mobile phone shown can also be any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, industrial control equipment, medical display screens, touch interactive terminals, etc. The embodiments of the present application do not specifically limit this.

[0090] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: include: substrate; A plurality of light-emitting units are arranged on the substrate, the light-emitting units include a light-emitting device and a light-conversion unit at least partially surrounding the periphery of the light-emitting device, the light-conversion unit is filled with a light-conversion material, and the light-conversion material is used to convert the wavelength of light emitted from the light-emitting device; A light shielding unit is located between the light emitting unit and the substrate, the light shielding unit is connected to the light conversion unit, and the light shielding unit is used to accommodate the light conversion material.

2. The display panel according to claim 1, characterized in that: The light conversion unit includes a first sub-conversion unit, a second sub-conversion unit and a third sub-conversion unit; The first sub-conversion unit comprises a first cavity, the first cavity is filled with a first light conversion material, and the first light conversion material is used to convert the light emitted from the light emitting device into visible light with a first wavelength; The second sub-conversion unit comprises a second cavity, the second cavity is filled with a second light conversion material, and the second light conversion material is used to convert the light emitted from the light emitting device into visible light with a second wavelength; The third sub-conversion unit comprises a third cavity, the third cavity is filled with a third light conversion material, and the third light conversion material is used to convert the light emitted from the light emitting device into visible light with a third wavelength; The wavelength ranges of the first wavelength, the second wavelength, and the third wavelength do not overlap.

3. The display panel according to claim 2, characterized in that: The first cavity, the second cavity and the third cavity are connected end to end in sequence and surround the outer periphery of the light emitting device.

4. The display panel according to claim 2, characterized in that: The first cavity surrounds at least part of the outer periphery of the light emitting device; the second cavity surrounds at least part of the outer periphery of the first cavity away from the light emitting device; and the third cavity surrounds the side of the second cavity away from the light emitting device.

5. The display panel according to claim 2, characterized in that: The shading unit includes a shading structure, which includes a first shading structure, a second shading structure and a third shading structure, the first shading structure is located between the first cavity and the substrate, the second shading structure is located between the second cavity and the substrate, and the third shading structure is located between the third cavity and the substrate.

6. The display panel according to claim 5, characterized in that: The first sub-conversion unit further includes a first electrode disposed on a side of the first cavity away from the substrate, and a second electrode disposed on a side of the first cavity close to the substrate; The second sub-conversion unit further includes a third electrode disposed on a side of the second cavity away from the substrate, and a fourth electrode disposed on a side of the second cavity close to the substrate; The third sub-conversion unit further includes a fifth electrode disposed on a side of the third cavity away from the substrate, and a sixth electrode disposed on a side of the third cavity close to the substrate.

7. The display panel according to claim 6, characterized in that: The light emitting device comprises a seventh electrode, a light emitting functional layer and an eighth electrode stacked along the thickness direction of the substrate; Along the thickness direction of the substrate, the orthographic projection area of ​​the seventh electrode on the surface of the substrate is smaller than the orthographic projection area of ​​the light-emitting functional layer; The shading unit further includes a fourth cavity located between the light-emitting functional layer and the substrate, wherein the fourth cavity is disposed around at least a portion of the periphery of the seventh electrode; and the fourth cavity is at least connected to the first cavity.

8. The display panel according to claim 7, characterized in that: The fourth cavity includes a first sub-cavity, a second sub-cavity and a third sub-cavity which are connected end to end in sequence, the first sub-cavity is connected to the first cavity, the second sub-cavity is connected to the second cavity, and the third sub-cavity is connected to the third cavity.

9. The display panel according to claim 8, characterized in that: The second electrode is located between the first sub-cavity and the substrate, the fourth electrode is located between the second sub-cavity and the substrate, and the sixth electrode is located between the third sub-cavity and the substrate.

10. The display panel according to claim 6, characterized in that: The second light-shielding structure covers a side of the fourth electrode away from the substrate, and the third light-shielding structure covers a side of the sixth electrode away from the substrate.

11. The display panel according to claim 10, characterized in that: A first groove is provided between the second light-shielding structure and the fourth electrode, a first opening is provided in the second light-shielding structure covering the fourth electrode, and the second cavity is connected to the first groove through the first opening; A second groove is provided between the third light-shielding structure and the sixth electrode. A second opening is provided in the third light-shielding structure covering the sixth electrode. The third cavity is connected to the second groove through the second opening.

12. The display panel according to claim 2, characterized in that: The light-emitting unit further includes a first filter structure, a second filter structure and a third filter structure, wherein the first filter structure covers a side of the second cavity away from the substrate, the second filter structure covers a side of the third cavity away from the substrate, and the third filter structure covers a side of the third cavity away from the substrate.

13. The display panel according to claim 1, characterized in that: The wavelength of light emitted by the light emitting device is in the range of 100nm to 400nm.

14. A display device, characterized in that: The invention comprises the display panel as claimed in any one of claims 1 to 13.

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