CN111490087A - Display panel and electronic device - Google Patents
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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Abstract
The application discloses a display panel and an electronic device. The display panel includes a pixel unit including a first sub-pixel emitting red light, a second sub-pixel emitting green light, and a third sub-pixel emitting blue light; the display panel is provided with a light-emitting structure which generates and provides blue light to the first sub-pixel, the second sub-pixel and the third sub-pixel; the first sub-pixel comprises a first light color conversion layer configured to convert blue light provided by the light emitting structure into red light; the second sub-pixel comprises a second light color conversion layer configured to convert blue light provided by the light emitting structure into green light. Through the arrangement, the display panel and the electronic equipment can reduce light loss and improve light emitting efficiency, so that the light brightness is improved; meanwhile, the manufacturing process steps of the display panel and the electronic equipment are simple.
Description
Technical Field
The present application relates to the field of display, and in particular, to a display panel and an electronic device.
Background
The existing display screens are basically an O L ED panel and a L CD panel, the O L ED panel has two technical directions of white light O L ED matched with a color filter and RGB O L ED, the L CD panel is generally provided with a backlight panel and a color filter for emitting white light, wherein the white light O L ED matched with the color filter and the L CD panel both have the defects of larger light loss and lower luminance due to the white light itself, and the RGB O L ED relates to an evaporation process of RGB three-color organic material layers, and has a complicated process and lower yield.
Disclosure of Invention
The application provides a display panel and an electronic device, which can reduce light loss and simplify the process.
According to a first aspect of the present application, there is provided a display panel including a pixel unit including a first sub-pixel emitting red light, a second sub-pixel emitting green light, and a third sub-pixel emitting blue light;
the display panel is provided with a light emitting structure which generates and provides blue light to the first sub-pixel, the second sub-pixel and the third sub-pixel;
the first sub-pixel comprises a first light color conversion layer configured to convert blue light provided by the light emitting structure into red light;
the second sub-pixel comprises a second light color conversion layer configured to convert blue light provided by the light emitting structure into green light.
Further, the material of the first light color conversion layer comprises a red fluorescent material or a red quantum dot material; and/or the presence of a gas in the gas,
the material of the second light color conversion layer comprises a green fluorescent material or a green quantum dot material.
Further, the material of the first light color conversion layer is a red quantum dot material; and/or the presence of a gas in the gas,
the material of the second light color conversion layer is a green fluorescent material.
Further, the first sub-pixel further comprises a red filter, and the red filter is arranged above the first light color conversion layer; and/or the presence of a gas in the gas,
the second sub-pixel also comprises a green light filter, and the green light filter is arranged above the second light color conversion layer; and/or the presence of a gas in the gas,
the third sub-pixel further comprises a blue filter, and the blue filter is arranged above the light-emitting structure in the third sub-pixel.
Further, the display panel is an O L ED display panel, and the light emitting structure includes an organic light emitting diode provided with an organic light emitting layer configured to emit blue light.
Further, the size of the first light color conversion layer in the first sub-pixel is greater than or equal to the size of the organic light emitting layer in the first sub-pixel, and the projection of the first light color conversion layer covers the projection of the organic light emitting layer in the first sub-pixel along the thickness direction of the display panel; and/or the presence of a gas in the gas,
the size of the second light color conversion layer in the second sub-pixel is larger than or equal to the size of the organic light emitting layer in the second sub-pixel, and the projection of the second light color conversion layer covers the projection of the organic light emitting layer in the second sub-pixel along the thickness direction of the display panel.
Further, the first sub-pixel further comprises a red filter, and the red filter is arranged above the first light color conversion layer; the size of the red filter is larger than or equal to that of the first light color conversion layer, and the projection of the red filter covers the projection of the first light color conversion layer along the thickness direction of the display panel; and/or the presence of a gas in the gas,
the second sub-pixel also comprises a green light filter, and the green light filter is arranged above the second light color conversion layer; the size of the green filter is larger than or equal to that of the second light color conversion layer, and the projection of the green filter covers the projection of the second light color conversion layer along the thickness direction of the display panel; and/or the presence of a gas in the gas,
the third sub-pixel further comprises a blue light filter, and the blue light filter is arranged above the light-emitting structure in the third sub-pixel; the size of the blue filter is larger than or equal to that of the light-emitting structure in the third sub-pixel, and the projection of the blue filter covers the projection of the organic light-emitting layer in the third sub-pixel along the thickness direction of the display panel.
Further, the display panel is a liquid crystal display panel, and the light emitting structure includes a backlight configured to emit blue light.
Further, the first sub-pixel further comprises a red filter, and the red filter is arranged above the first light color conversion layer;
the second sub-pixel also comprises a green light filter, and the green light filter is arranged above the second light color conversion layer;
the third sub-pixel further comprises a blue light filter, and the blue light filter is arranged above the light-emitting structure in the third sub-pixel;
the red filter, the green filter and the blue filter are arranged on the same layer, and a shading layer is arranged among the red filter, the green filter and the blue filter.
According to a second aspect of the present application, an electronic device is provided, which includes a housing and the display panel, wherein the housing and the display panel are fixedly connected.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
through the arrangement, the display panel and the electronic equipment can reduce light loss and improve light emitting efficiency, so that the light brightness is improved; meanwhile, the light emitting structures of the first sub-pixel, the second sub-pixel and the third sub-pixel are the same and are all configured to emit blue light, so that the manufacturing process steps of the display panel and the electronic device are simple.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a display panel of embodiment 1.
Fig. 2 is another schematic cross-sectional view of the display panel of embodiment 1.
Fig. 3 is a schematic cross-sectional view of a display panel according to embodiment 1.
Fig. 4 is a schematic cross-sectional view of a display panel according to embodiment 1.
Fig. 5 is a schematic flow chart illustrating a method for manufacturing a display panel according to embodiment 1.
Fig. 6 is a schematic cross-sectional structure diagram of the display panel of embodiment 2.
Description of the reference numerals
Organic light emitting diode 111
Electron transport layer 1113
Organic light emitting layer 1115
Low temperature polysilicon layer 1124
Light color conversion structure 120
First light color conversion layer 121
Second light color conversion layer 122
First bottom insulating layer 161
Second bottom insulating layer 162
Insulating layer 193
First protective layer 194
Second protective layer 195
Light-shielding layer 200
Third protective layer 300
Fourth protective layer 400
Thickness direction H
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It should be understood that the terms "first," "second," and the like as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
The embodiments of the present application will be described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.
Example 1
The application discloses electronic equipment, electronic equipment are including being used for the display panel and the casing that show, casing and display panel fixed connection. In this embodiment, the electronic device is a mobile phone. Of course, in other embodiments, the electronic device may also be other devices with display panels, such as: computers, tablets, electronic books, watches with smart display capabilities, and the like. Meanwhile, in this embodiment, the display panel is a flexible display panel, and certainly, in other embodiments, the display panel may also be a display panel that is not deformable.
As shown in fig. 1, the display panel 10 includes a pixel unit 100. The number of the pixel units 100 is plural, and only one pixel unit 100 is illustrated in the figure for clearly showing the internal structure of the pixel unit 100. Each pixel unit 100 can emit light, and the image display can be realized by the cooperation of a plurality of pixel units 100.
The pixel unit 100 includes a first sub-pixel 101 emitting red light, a second sub-pixel 102 emitting green light, and a third sub-pixel 103 emitting blue light. By independently controlling the light emission of each sub-pixel, the color and brightness displayed by the pixel unit 100 are finally determined.
The display panel 10 is further provided with a light emitting structure 110, and in the present embodiment, the first sub-pixel 101, the second sub-pixel 102 and the third sub-pixel 103 each include the light emitting structure 110, that is, the light emitting structure 110 is at least part of the first sub-pixel 101, the second sub-pixel 102 and the third sub-pixel 103, so that independent light emission of the first sub-pixel 101, the second sub-pixel 102 and the third sub-pixel 103 is realized. The light emitting structure 110 is configured to emit blue light. The first sub-pixel 101 and the second sub-pixel 102 further comprise a light color conversion structure 120. The light color conversion structure 120 is configured to convert blue light emitted by the light emitting structure 110 into red or green light. Since the energy of the blue light is the largest, the light emitting structures 110 of all the sub-pixels emit the blue light, which is beneficial for the subsequent light color conversion structure 120 to convert the blue light into other colors of light.
In the present embodiment, the display panel 10 is an O L ED display panel 10 the light emitting structure 110 includes an organic light emitting diode 111 for generating light and a transistor 112 controlling the organic light emitting diode 111.
Continuing to refer to fig. 1, in the present embodiment, the organic light emitting diode 111 includes a cathode layer 1111, an electron injection layer 1112, an electron transport layer 1113, a hole blocking layer 1114, an organic light emitting layer 1115, an electron blocking layer 1116, a hole transport layer 1117, a hole injection layer 1118, and an anode layer 1119. The organic light emitting layer 1115 is configured to emit blue light, and is made of an organic material capable of emitting blue light. The transistor 112 includes a first gate layer 1121, a second gate layer 1122, a source drain layer 1123, and a low temperature polysilicon layer 1124. The source drain layer 1123 is connected to the anode layer 1119 of the oled 111. The first gate layer 1121 and the second gate layer 1122 may form a capacitor structure. In actual practice, either the source or the drain in the source drain layer 1123 may be connected to the anode layer 1119, depending on the type of transistor 112 employed. During operation, the transistor 112 can control voltage and current of the anode layer 1119 in the organic light emitting diode 111, so as to control excitation and migration of holes of the anode layer 1119 and electrons of the cathode layer 1111, and further control light emission of the organic light emitting layer 1115.
Light color converting structure 120 includes a first light color conversion layer 121 and a second light color conversion layer 122. The first light conversion layer 121 is disposed above the light emitting structure 110, and the first light conversion layer 121 is configured to convert blue light provided by the light emitting structure 110 into red light, that is, convert blue light emitted by the light emitting structure 110 in the first sub-pixel 101 into red light, so that the first sub-pixel 101 has a capability of emitting red light. The second light conversion layer 122 is disposed above the light emitting structure 110, and the first light conversion layer 121 is configured to convert the blue light provided by the light emitting structure 110 into green light, so as to convert the blue light emitted by the light emitting structure 110 in the second sub-pixel 102 into green light, thereby enabling the second sub-pixel 102 to have the capability of emitting green light.
In this embodiment, to facilitate fabrication by a semiconductor process, the display panel 10 further includes a substrate 130, a polyimide film layer 140 (PI), a buffer layer 150(buffer), a first bottom insulating layer 161(GI1), a second bottom insulating layer 162(GI2), an interlayer electrical layer 170(Inter L a layers Dielectrics, I L D), a first planarization layer 180(P L N), a pixel definition layer 191 (PD L), an encapsulation layer 192, and an insulating layer 193, wherein the substrate 130 may be made of glass, the first subpixel 101, the second subpixel 102, and the third subpixel 103 are spaced apart from each other, that is, a gap exists between the first subpixel 101, the second subpixel 102, and the third subpixel 103, and the pixel definition layer 191 is made of silicon oxide (SiO), silicon nitride (SiN), silicon nitride (SiO), or silicon nitride (SiN).
A conventional display panel generally uses a light emitting structure 110 emitting white light, and color filters are disposed above the light emitting structures 110 of the first, second, and third sub-pixels 101, 102, and 103, thereby realizing that the first, second, and third sub-pixels 101, 102, and 103 emit light of different colors. However, the combination of the white light and the color filter generates a large light loss, so that the display brightness of the first sub-pixel 101, the second sub-pixel 102 and the third sub-pixel 103 is low. Alternatively, in another arrangement, different organic light emitting materials need to be evaporated on the first sub-pixel 101, the second sub-pixel 102 and the third sub-pixel 103, for example: the first sub-pixel 101 needs to be coated with an organic light-emitting material for emitting red light by evaporation, the second sub-pixel 102 needs to be coated with an organic light-emitting material for emitting green light by evaporation, the third sub-pixel 103 needs to be coated with an organic light-emitting material for emitting blue light by evaporation, different sub-pixels need to be coated with different organic light-emitting materials by evaporation in sequence, and the method is complex in process steps, high in precision requirement, high in cost and low in yield.
In the present embodiment, each of the light emitting structures 110 emits blue light instead of a structure emitting white light. The conversion of light colors is achieved by providing a first light color conversion layer 121 and a second light color conversion layer 122 in the first subpixel 101 and the second subpixel 102, respectively. In other words, light color converting structure 120 includes a first light color conversion layer 121 and a second light color conversion layer 122. Due to the fact that the blue light energy is large, the phenomenon of light loss can be reduced, the light emitting efficiency is improved, the display effect of the pixel unit 100, the display panel 10 and the electronic device is improved, the reality degree of the original color is well reduced, and high-fidelity display is achieved. Meanwhile, since the light emitting structures 110 of the first sub-pixel 101, the second sub-pixel 102, and the third sub-pixel 103 are the same, they are configured to emit blue light. Then, the organic light emitting layers 1115 of the first sub-pixel 101, the second sub-pixel 102 and the third sub-pixel 103 can be obtained by evaporating the organic light emitting material emitting blue light to the first sub-pixel 101, the second sub-pixel 102 and the third sub-pixel 103 simultaneously. The method has the advantages of simple process steps, low precision requirement, low cost and high yield.
In this embodiment, the material of the first light color conversion layer 121 includes or is a red quantum dot material, and the material of the second light color conversion layer 122 includes or is a green fluorescent material. Experiments show that the central peak of green light excited by Quantum Dot (QD) material is 540 nm. Although the quantum dot material has a narrow half-peak width and high color purity, the central peak is large, so that the green light-emitting efficiency is poor after the excitation of blue light. However, when the red quantum dot material converts the light color, the excitation efficiency of the quantum dot material is not attenuated, the color purity is high, and the red light emitting efficiency is high. Therefore, a red quantum dot material is selected as the material of the first light color conversion layer 121, so as to convert the blue light emitted by the light emitting structure 110 into red light. Meanwhile, experiments show that the central peak of the green fluorescent material is 520 nanometers, and the half-peak width is slightly larger than the green range of the quantum dot material. It can carry out effective conversion to the blue light, promotes green luminous efficiency. Therefore, a green fluorescent material is selected as the material of the second light color conversion layer 122, so as to convert the blue light emitted by the light emitting structure 110 into green light. Through the above arrangement, the overall display effect can be improved, so that the display panel 10 has a high true color display effect.
Of course, in other embodiments, the material of the first light color conversion layer 121 may also include a red fluorescent material, and the material of the second light color conversion layer 122 may also include a green quantum dot material.
It should be noted that the quantum dot material is mainly composed of semiconductor materials, such as: cadmium selenide (CdSe for short), lead selenide (PbSe for short), and the like, and the size of the particles of the semiconductor material is not less than 1 nanometer and not more than 10 nanometers. Fluorescent materials are mainly classified into two types, inorganic fluorescent materials and organic fluorescent materials. The inorganic fluorescent material is a sulfide of an alkaline earth metal (e.g., zinc sulfate (ZnS), calcium sulfate (CaS)), an aluminate (e.g., SrAl)2O4、CaAl2O4BaAl2O4), and the like as a light-emitting substrate, with a rare earth lanthanoid (for example: europium (Eu), samarium (Sm), erbium (Er), neodymium (Nd)) and the like as activators and co-activators. The organic fluorescent material mainly includes conjugated polymers such as polyphenyl, polythiophene, polyfluorene, polytriphenylamine, derivatives thereof, and the like. Alternatively, they include polytriphenylamine, polycarbazole, polypyrrole, polyporphyrin and derivatives thereof.
Further, as shown in fig. 1, the light color conversion structure 120 further includes a red filter 123, a green filter 124, and a blue filter 125.
The red filter 123 is disposed above the first light color conversion layer 121, that is, the red filter 123 is disposed on a side of the first light color conversion layer 121 far from the substrate 130. In other words, the first sub-pixel 101 further includes a red filter 123. In the operation process, the first light color conversion layer 121 may convert the blue light emitted from the light emitting structure 110 into red light, and then the red light passes through the red light filter 123, and the red light filter 123 may screen the light, so that the red light emitted from the first sub-pixel 101 is more pure. In this process, since most of the blue light is converted into red light by the first light color conversion layer 121, the red filter 123 added above the first light color conversion layer 121 will not generate a large light loss, but only the red light emitted by the first sub-pixel 101 will be purer. With the above arrangement, it is advantageous for the display panel 10 to realize high-fidelity display.
The green filter 124 is disposed above the second light color conversion layer 122, that is, the green filter 124 is disposed on a side of the second light color conversion layer 122 away from the substrate 130. In other words, the second sub-pixel 102 further includes a green filter 124. During operation, the second light color conversion layer 122 can convert the blue light emitted from the light emitting structure 110 into green light, and then the light passes through the green filter 124, and the green filter 124 can screen the light, so that the green light emitted from the second sub-pixel 102 is more pure. In this process, since most of the blue light is converted into green light by the second light color conversion layer 122, the addition of the green filter 124 above the second light color conversion layer 122 will not cause large light loss, but only make the green light emitted by the second sub-pixel 102 more pure. With the above arrangement, it is advantageous for the display panel 10 to realize high-fidelity display.
The blue filter 125 is disposed above the light emitting structure 110 in the third sub-pixel 103, that is, the blue filter 125 is disposed on a side of the light emitting structure 110 in the third sub-pixel 103 away from the substrate 130. In other words, the third sub-pixel 103 further includes a blue filter 125. By arranging the blue filter 125, the light emitted by the light emitting structure 110 can be displayed through the blue filter 125, which is beneficial to improving the purity of the blue light. In this process, since the light emitted from the light emitting structure 110 is blue light, the addition of the blue filter 125 above the light emitting structure 110 will not cause a large light loss, but only make the blue light emitted from the third sub-pixel 103 more pure. With the above arrangement, it is advantageous for the display panel 10 to realize high-fidelity display.
In this embodiment, the red filter 123, the green filter 124, and the blue filter 125 are disposed in the same layer. Of course, in other embodiments, the red filter 123, the green filter 124, and the blue filter 125 may be distributed in different layers.
Of course, in other embodiments, the red filter 123 may be disposed only in the first sub-pixel 101, the green filter 124 may be disposed only in the second sub-pixel 102, or the blue filter 125 may be disposed only in the third sub-pixel 103, or corresponding color filters may be disposed in any two of the sub-pixels.
Further, the size of the first light color conversion layer 121 in the first sub-pixel 101 may be greater than or equal to the size of the organic light emitting layer 1115 in the first sub-pixel 101, and a projection of the first light color conversion layer 121 covers a projection of the organic light emitting layer 1115 in the first sub-pixel 101 in the thickness direction H of the display panel 10. The size of the second light color conversion layer 122 in the second sub-pixel 102 may be greater than or equal to the size of the organic light emitting layer 1115 in the second sub-pixel 102, and a projection of the second light color conversion layer 122 covers a projection of the organic light emitting layer 1115 in the second sub-pixel 102 in the thickness direction H of the display panel 10.
In the present embodiment, since the light emitting structure 110 is the organic light emitting diode 111, the structure directly functioning as light emitting is the organic light emitting layer 1115. The light emitted from the organic light emitting layer 1115 emits light outward in the thickness direction H of the display panel 10. Therefore, it is only necessary to ensure that the size of the first light color conversion layer 121 is larger than the size of the organic light-emitting layer 1115 in the first sub-pixel 101, so that most of the light emitted from the organic light-emitting layer 1115 reaches the first light color conversion layer 121 to perform light color conversion. Similarly, by limiting the size of the second light color conversion layer 122, it is ensured that most of the light emitted from the organic light emitting layer 1115 of the second sub-pixel 102 reaches the second light color conversion layer 122 for light color conversion. Furthermore, the waste of light can be avoided, and the brightness of the display can be ensured. Meanwhile, in the light emitting direction, the light leakage between adjacent sub-pixels can be avoided by setting the sizes of the first light color conversion layer 121 and the second light color conversion layer 122.
Further, the size of the red filter 123 may be greater than or equal to the size of the first light color conversion layer 121, and the projection of the red filter 123 covers the projection of the first light color conversion layer 121 along the thickness direction H of the display panel 10. The size of the green filter 124 may be greater than or equal to the size of the second light color conversion layer 122, and the projection of the green filter 124 covers the projection of the second light color conversion layer 122 along the thickness direction H of the display panel 10. The size of the blue filter 125 may be equal to or greater than the size of the light emitting structure 110 in the third sub-pixel 103, and a projection of the blue filter 125 covers a projection of the organic light emitting layer 1115 in the third sub-pixel 103 in the thickness direction H of the display panel 10.
In the above arrangement, by setting the sizes of the red filter 123 and the green filter 124, it can be ensured that the light emitted from the organic light emitting layer 1115 and converted by the first light color conversion layer 121 or the second light color conversion layer 122 can be emitted and displayed after passing through the red filter 123 or the green filter 124. By setting the size of the blue filter 125, it can be ensured that the light emitted from the light-emitting structure 110 can first pass through the blue filter 125 and then be emitted outward for display. Through the arrangement, the purity of light emitted by the first sub-pixel 101, the second sub-pixel 102 and the third sub-pixel 103 can be ensured, and meanwhile, a light channeling phenomenon caused by the interval arrangement of the first sub-pixel 101, the second sub-pixel 102 and the third sub-pixel 103 can be avoided.
Further, the distance between the first light color conversion layer 121 and the red color filter 123 and the distance between the second light color conversion layer 122 and the green color filter 124 are the same, and are all 1 μm. Of course, in other embodiments, the distance may be any value greater than or equal to 0.5 microns and less than or equal to 1.5 microns. The distance between the two is small, and the light leakage phenomenon is not easy to occur in the distance range.
In the present embodiment, the display panel 10 further includes an insulating layer 193 layer, a first protective layer 194, a second protective layer 195, and a glass cover plate 196. During the manufacturing process, after the first light color conversion layer 121 and the second light color conversion layer 122 are formed, an insulating layer 193 may be formed on the first light color conversion layer 121 and the second light color conversion layer 122, and then a first protection layer 194 is formed on the insulating layer 193, where the first protection layer 194 plays a role in protection and planarization. Then, a red filter 123, a green filter 124, and a blue filter 125 are formed or disposed over the first protective layer 194. Then, a second passivation layer 195 is formed over the red filter 123, the green filter 124, and the blue filter 125. The second protective layer 195 functions to protect the color filter and planarize. Finally, a glass cover plate 196 is formed or disposed over the second protective layer 195.
As shown in fig. 5, the present application further discloses a manufacturing method of the display panel 10, the manufacturing method is used for manufacturing the display panel 10, and the manufacturing method includes:
step 1000: a substrate 130 is provided.
Step 1100: a plurality of light emitting structures 110 are formed. In this step, the organic light emitting layer 1115 may be formed by evaporation.
Step 1200: an encapsulation layer 192 is formed over the light emitting structure 110. At this time, the structure of the display panel 10 is as shown in fig. 2.
Step 1300: a first light color conversion layer 121 and a second light color conversion layer 122 are disposed on encapsulation layer 192. At this time, the structure of the display panel 10 is as shown in fig. 3. In this step, first light color conversion layer 121 and second light color conversion layer 122 may be formed by a process of photolithography and etching, respectively. For example, the following steps are carried out: the green phosphor is coated on the top of the encapsulation layer 192, exposed, cured at 230 ℃ for one hour, and developed, etched, and stripped to form the second light color conversion layer 122. The red quantum dot material is also subjected to coating, exposure, curing, developing, etching, photoresist removal, and the like to form the first light color conversion layer 121. Wherein the curing time of the red quantum dot material is 30min, and the curing temperature is 130 ℃. Of course, the first photoelectric conversion layer 121 and the second photoelectric conversion layer 122 may also be formed in sequence by means of inkjet printing. Wherein the thickness of the first photoelectric conversion layer 121 and the second photoelectric conversion layer 122 is 1 μm. Of course, in other embodiments, the thickness of the first photoelectric conversion layer 121 and the second photoelectric conversion layer 122 may also be any value between 0.9 micron or more and 1.5 micron or less.
Note that the first photoelectric conversion layer 121 may be formed first, and then the second photoelectric conversion layer 122 may be formed; alternatively, the second photoelectric conversion layer 122 may be formed first, and then the first photoelectric conversion layer 121 may be formed.
Step 1400: an insulating layer 193 is formed over first light color conversion layer 121, second light color conversion layer 122 and encapsulation layer 192.
Step 1500: first protective layer 194 is formed over insulating layer 193, and first protective layer 194 functions to protect first light color conversion layer 121 and second light color conversion layer 122 and also functions to planarize. At this time, the structure of the display panel 10 is as shown in fig. 4.
Step 1600: a red filter 123, a green filter 124, and a blue filter 125 are formed over the first protective layer 194. The formation of the color filter is similar to the formation of the first light color conversion layer 121 and the second light color conversion layer 122. It should be noted that the order of forming the red filter 123, the green filter 124, and the blue filter 125 is not limited.
Step 1700: a second protective layer 195 is formed over the first protective layer 194, the red filter 123, the green filter 124, and the blue filter 125.
Step 1800: a glass cover plate 196 is disposed over the second protective layer 195. For example, a pre-formed glass cover plate 196 may be placed over the second protective layer 195. At this time, the structure of the display panel 10 is as shown in fig. 1.
Example 2
As shown in fig. 6, the present embodiment also discloses a display panel 10, the display panel 10 of the present embodiment is substantially the same as the display panel 10 of embodiment 1, and the similar points are not repeated, except that in the present embodiment, the display panel 10 is a liquid crystal display panel, the light emitting structure 110 includes a backlight configured to emit blue light, in an embodiment, the backlight includes L ED for emitting blue light, and the display panel 10 is a L ED liquid crystal display panel.
The red filter 123, the green filter 124, and the blue filter 125 are disposed in the same layer, and gaps are provided between the red filter 123, the green filter 124, and the blue filter 125, and the light-shielding layer 200 is disposed in the gaps.
In this embodiment, the structure for emitting light in the light emitting structure 110 is a backlight plate, and the first sub-pixel 101, the second sub-pixel 102, and the third sub-pixel 103 share one backlight plate. Then, at least a portion of the backlight plate still exists in the gap between the first sub-pixel 101, the second sub-pixel 102 and the third sub-pixel 103, and the portion of the backlight plate normally emits light during operation, so that a light leakage phenomenon occurs in the gap between the first sub-pixel 101, the second sub-pixel 102 and the third sub-pixel 103, and the display effect is affected. By arranging the light shielding layer 200 in the gap, the light in the gap among the first sub-pixel 101, the second sub-pixel 102 and the third sub-pixel 103 can be blocked from overflowing outwards, and the display effect of the display panel 10 is ensured.
The manufacturing method of the display panel 10 may include various methods. The third passivation layer 300, the first light color conversion layer 121, the second light color conversion layer 122, the insulating layer 193, the fourth passivation layer 400, the light shielding layer, the red filter 123, the green filter 124, the blue filter 125, and the glass cover 196 may be formed over the light emitting structure 110. Or forming the light shielding layer 200, the red filter 123, the green filter 124, and the blue filter 125 on the glass cover 196, then forming the fourth protection layer 400, then forming the insulating layer 193, then forming the first light color conversion layer 121, the second light color conversion layer 122, then forming the third protection layer 300, and finally arranging the above-mentioned structure and the light emitting structure 110 in a box, thereby finally forming the display panel 10.
Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.
Claims (10)
1. A display panel, comprising a pixel unit including a first sub-pixel emitting red light, a second sub-pixel emitting green light, and a third sub-pixel emitting blue light;
the display panel is provided with a light emitting structure which generates and provides blue light to the first sub-pixel, the second sub-pixel and the third sub-pixel;
the first sub-pixel comprises a first light color conversion layer configured to convert blue light provided by the light emitting structure into red light;
the second sub-pixel comprises a second light color conversion layer configured to convert blue light provided by the light emitting structure into green light.
2. The display panel of claim 1, wherein the material of the first light color conversion layer comprises a red fluorescent material or a red quantum dot material; and/or the presence of a gas in the gas,
the material of the second light color conversion layer comprises a green fluorescent material or a green quantum dot material.
3. The display panel of claim 2, wherein the material of the first light color conversion layer is a red quantum dot material; and/or the presence of a gas in the gas,
the material of the second light color conversion layer is a green fluorescent material.
4. The display panel of claim 1, wherein the first sub-pixel further comprises a red filter disposed over the first light color conversion layer; and/or the presence of a gas in the gas,
the second sub-pixel also comprises a green light filter, and the green light filter is arranged above the second light color conversion layer; and/or the presence of a gas in the gas,
the third sub-pixel further comprises a blue filter, and the blue filter is arranged above the light-emitting structure in the third sub-pixel.
5. The display panel according to claim 1, wherein the display panel is an O L ED display panel, and the light emitting structure includes an organic light emitting diode provided with an organic light emitting layer configured to emit blue light.
6. The display panel of claim 5, wherein the first light color conversion layer in the first sub-pixel has a size equal to or greater than a size of the organic light emitting layer in the first sub-pixel, and a projection of the first light color conversion layer covers a projection of the organic light emitting layer in the first sub-pixel in a thickness direction of the display panel; and/or the presence of a gas in the gas,
the size of the second light color conversion layer in the second sub-pixel is larger than or equal to the size of the organic light emitting layer in the second sub-pixel, and the projection of the second light color conversion layer covers the projection of the organic light emitting layer in the second sub-pixel along the thickness direction of the display panel.
7. The display panel of claim 1, wherein the first sub-pixel further comprises a red filter disposed over the first light color conversion layer; the size of the red filter is larger than or equal to that of the first light color conversion layer, and the projection of the red filter covers the projection of the first light color conversion layer along the thickness direction of the display panel; and/or the presence of a gas in the gas,
the second sub-pixel also comprises a green light filter, and the green light filter is arranged above the second light color conversion layer; the size of the green filter is larger than or equal to that of the second light color conversion layer, and the projection of the green filter covers the projection of the second light color conversion layer along the thickness direction of the display panel; and/or the presence of a gas in the gas,
the third sub-pixel further comprises a blue light filter, and the blue light filter is arranged above the light-emitting structure in the third sub-pixel; the size of the blue filter is larger than or equal to that of the light-emitting structure in the third sub-pixel, and the projection of the blue filter covers the projection of the organic light-emitting layer in the third sub-pixel along the thickness direction of the display panel.
8. The display panel of claim 1, wherein the display panel is a liquid crystal display panel and the light emitting structure comprises a backlight configured to emit blue light.
9. The display panel of claim 8, wherein the first sub-pixel further comprises a red filter disposed over the first light color conversion layer;
the second sub-pixel also comprises a green light filter, and the green light filter is arranged above the second light color conversion layer;
the third sub-pixel further comprises a blue light filter, and the blue light filter is arranged above the light-emitting structure in the third sub-pixel;
the red filter, the green filter and the blue filter are arranged on the same layer, and a shading layer is arranged among the red filter, the green filter and the blue filter.
10. An electronic device, characterized in that the electronic device comprises a housing and a display panel according to any one of claims 1-9.
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| CN202010328540.8A CN111490087A (en) | 2020-04-23 | 2020-04-23 | Display panel and electronic device |
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| CN202010328540.8A CN111490087A (en) | 2020-04-23 | 2020-04-23 | Display panel and electronic device |
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Application publication date: 20200804 |