CN115696947A - Display panel and display device - Google Patents
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- CN115696947A CN115696947A CN202211434083.6A CN202211434083A CN115696947A CN 115696947 A CN115696947 A CN 115696947A CN 202211434083 A CN202211434083 A CN 202211434083A CN 115696947 A CN115696947 A CN 115696947A
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Abstract
The invention discloses a display panel and a display device, which relate to the technical field of display and comprise a substrate and an array layer arranged on the substrate; the light-emitting layer is positioned on one side of the array layer, which is far away from the substrate, and comprises a plurality of light-emitting elements which are electrically connected with the array layer; the packaging layer comprises a first packaging layer, a second packaging layer and a third packaging layer which are stacked along a first direction, the second packaging layer is positioned between the first packaging layer and the third packaging layer, the third packaging layer is positioned between the second packaging layer and the luminous layer, and the first direction is the thickness direction of the display panel; and the quantum dot color conversion layer is positioned between the luminous layer and the first packaging layer and is overlapped with the luminous element along the first direction. The light emitted by the light-emitting element is used for exciting the quantum dot color conversion layer to emit light, so that the position and the color purity of a color dot are effectively controlled, the optimization of the corresponding color dot can be realized, and the integral display effect of the display panel is improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
The Display industry has been developing for decades from the CRT (Cathode Ray Tube) era to the Liquid Crystal Display (LCD) era, now to the Organic Light-Emitting Diode (OLED) era and the led Display era. The display industry is closely related to our life, and display technologies cannot be separated from traditional mobile phones, flat panels, televisions and PCs to the existing electronic devices such as intelligent wearable devices, VR and vehicle-mounted displays.
An Organic Light-Emitting Diode (OLED) is a Diode that uses reversible color change generated by an Organic semiconductor material under the driving of current to realize display. The basic structure of an OLED display device generally includes an anode, a light-emitting material layer, and a cathode. When the power supply supplies a proper voltage, the holes of the anode and the electrons of the cathode are combined in the light-emitting layer to generate bright light. Compared with the thin film transistor liquid crystal display, the OLED display device has the characteristics of high visibility and high brightness, and is more power-saving, light-weight and thin in thickness, and therefore, the OLED display device is considered as one of the most promising products in the 21 st century.
The organic light-emitting material is limited by the light-emitting characteristics of the organic light-emitting material, and the emission peak of the organic light-emitting material is wide (the half-peak width is large), so that the emission spectrum of the OLED display device is also wide in the display process, the color gamut is low, and the display effect is influenced.
Disclosure of Invention
In view of the above, the present invention provides a display panel and a display device, in which light emitted from a light emitting element is used to excite a quantum dot color conversion layer to emit light, so as to effectively control color dot positions and color purity, achieve optimization of corresponding color dots, and improve the overall display effect of the display panel.
In a first aspect, the present invention provides a display panel comprising:
the array structure comprises a substrate and an array layer arranged on the substrate;
the light-emitting layer is positioned on one side, away from the substrate, of the array layer and comprises a plurality of light-emitting elements, and the light-emitting elements are electrically connected with the array layer;
the packaging layer comprises a first packaging layer, a second packaging layer and a third packaging layer which are stacked along a first direction, the second packaging layer is positioned between the first packaging layer and the third packaging layer, the third packaging layer is positioned between the second packaging layer and the light-emitting layer, and the first direction is the thickness direction of the display panel;
and the quantum dot color conversion layer is positioned between the luminous layer and the first packaging layer and is overlapped with the luminous element along the first direction.
In a second aspect, the present invention provides a display device comprising the display panel provided in the first aspect of the present application.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
the display panel and the display device provided by the invention comprise a substrate, an array layer arranged on the substrate, a light-emitting layer arranged on one side of the array layer, which is far away from the substrate, and an encapsulation layer arranged on one side of the light-emitting layer, which is far away from the substrate. Particularly, the quantum dot color conversion layer is introduced between the light emitting layer and the first packaging layer, the quantum dot material has the advantages of high light emitting efficiency, narrow emission peak, high light emitting color purity and high color gamut, when the quantum dot color conversion layer is arranged in the light emitting direction of the light emitting layer, the light emitted by the light emitting element is utilized to excite the quantum dot color conversion layer to emit light, the position and the color purity of a color point are effectively controlled, optimization of the corresponding color point can be realized, and the overall display effect of the display panel is improved. In addition, the packaging layer is including the first packaging layer, second packaging layer and the third packaging layer that set gradually, and wherein, the third packaging layer is adjacent with the luminescent layer, and first packaging layer is located one side that the second packaging layer deviates from the third packaging layer, utilizes the packaging layer can protect quantum dot colour conversion layer, avoids quantum dot colour conversion layer to receive steam to influence, is favorable to guaranteeing quantum dot colour conversion layer's validity and reliability.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a top view of a display panel according to an embodiment of the invention;
fig. 2 is a schematic diagram illustrating a BB oriented film layer of the display panel according to the embodiment of the invention;
fig. 3 is a schematic diagram illustrating another BB oriented film layer of the display panel according to the embodiment of the invention;
FIG. 4 is a schematic diagram of a first quantum dot structure, a second quantum dot structure, and a third quantum dot structure in a display panel;
FIG. 5 is a schematic view of another structure of a first quantum dot structure, a second quantum dot structure, and a third quantum dot structure in a display panel;
fig. 6 is a schematic diagram illustrating another BB alignment film layer of the display panel according to the embodiment of the invention;
fig. 7 is a schematic diagram illustrating another BB alignment film layer of the display panel according to the embodiment of the invention;
fig. 8 is a schematic view illustrating another BB oriented film layer of the display panel according to the embodiment of the invention;
fig. 9 is a schematic diagram illustrating another BB oriented film layer of the display panel according to the embodiment of the invention;
fig. 10 is a schematic structural diagram of a display device according to an embodiment of the invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The present invention provides a display panel including: the array structure comprises a substrate and an array layer arranged on the substrate; the light-emitting layer is positioned on one side, away from the substrate, of the array layer and comprises a plurality of light-emitting elements, and the light-emitting elements are electrically connected with the array layer; the packaging layer comprises a first packaging layer, a second packaging layer and a third packaging layer which are stacked along a first direction, the second packaging layer is positioned between the first packaging layer and the third packaging layer, the third packaging layer is positioned between the second packaging layer and the luminous layer, and the first direction is the thickness direction of the display panel; and the quantum dot color conversion layer is positioned between the luminous layer and the first packaging layer and is overlapped with the luminous element along the first direction. The invention utilizes the light emitted by the light-emitting element to excite the quantum dot color conversion layer to emit light, effectively controls the position and the color purity of the color dot, can realize the optimization of the corresponding color dot and improves the integral display effect of the display panel.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the embodiments of the present invention.
Fig. 1 is a top view of a display panel according to an embodiment of the present invention, fig. 2 is a schematic diagram of a BB oriented film layer of the display panel according to the embodiment of the present invention, and referring to fig. 1 and fig. 2, a display panel 100 according to an embodiment of the present invention includes:
a substrate 00, an array layer 10 disposed on the substrate 00;
a light-emitting layer 20 located on a side of the array layer 10 away from the substrate 00, wherein the light-emitting layer 20 includes a plurality of light-emitting elements P, and the light-emitting elements P are electrically connected with the array layer 10;
an encapsulation layer 30 including a first encapsulation layer 31, a second encapsulation layer 32, and a third encapsulation layer 33 stacked along a first direction D1, where the second encapsulation layer 32 is located between the first encapsulation layer 31 and the third encapsulation layer 33, the third encapsulation layer 33 is located between the second encapsulation layer 32 and the light-emitting layer 20, and the first direction D1 is a thickness direction of the display panel 100;
and a quantum dot color conversion layer 40 between the light emitting layer 20 and the first encapsulation layer 31, the quantum dot color conversion layer 40 overlapping the light emitting element P along the first direction D1.
Alternatively, the display panel provided in this embodiment may be a display panel adopting an Organic Light-Emitting Diode (OLED) display technology, and the basic structure of the Light-Emitting layer 20 of the OLED display panel generally includes an anode, a Light-Emitting material layer and a cathode. When the power supply supplies a proper voltage, the holes of the anode and the electrons of the cathode are combined in the light-emitting material layer to generate bright light. Compared with a thin film field effect transistor liquid crystal display, the OLED display device has the characteristics of high visibility and high brightness, and is more electricity-saving, light in weight and thin in thickness. Of course, in some other embodiments of the present invention, the display panel may also be a display panel using inorganic light emitting diode display technology, such as Micro LED display panel, or Mini LED display panel, etc. Fig. 2 is only for illustration of the OLED display panel. Taking the OLED display panel as an example, the light emitting layer 20 further includes a pixel defining layer for accommodating the light emitting material layer, the opening region mentioned in the present invention may be regarded as a region defined by the pixel defining layer for accommodating the light emitting material layer, and the non-opening region may be regarded as other regions except the opening region in the display region AA. Optionally, a quantum dot color conversion layer 40 covers the light emitting elements P.
With continued reference to fig. 2, an array layer 10 is further provided between the substrate 00 and the light emitting layer 20, and the array layer 10 includes a transistor electrically connected to the light emitting element P for supplying an electrical signal to an anode of the light emitting element P. Although only the transistors connected to the anodes of the light emitting elements P are shown in the film structure of fig. 2, other transistors not directly connected to the anodes of the light emitting elements P may be optionally included in the array layer 10, for example, a plurality of pixel driving circuits are included in the array layer 10, each pixel driving circuit includes at least two transistors, and optionally, different light emitting elements P are connected to different pixel driving circuits. The pixel driving circuit may be, for example, a circuit such as 2T1C (two transistors and one capacitor), 7T1C, 8T1C, and the like in the related art, which is not particularly limited in the present invention.
With continuing reference to fig. 1 and fig. 2, the display panel provided by the present invention includes a substrate 00, an array layer 10 disposed on the substrate 00, a light emitting layer 20 disposed on a side of the array layer 10 away from the substrate 00, and an encapsulation layer 30 disposed on a side of the light emitting layer 20 away from the substrate 00, and the light emitting layer 20 is encapsulated by the encapsulation layer 30, which is beneficial to avoiding the influence of external moisture and oxygen on the light emitting layer 20. Particularly, the quantum dot color conversion layer 40 is further introduced between the light emitting layer 20 and the first encapsulation layer 31, the quantum dot material has the advantages of high light emitting efficiency, narrow emission peak, high light emitting color purity and high color gamut, when the quantum dot color conversion layer 40 is arranged in the light emitting direction of the light emitting layer 20, the light emitted by the light emitting element P is utilized to excite the quantum dot color conversion layer 40 to emit light, the color point position and the color purity are effectively controlled, optimization of corresponding color points can be realized, and the overall display effect of the display panel is improved. In addition, the packaging layer 30 comprises a first packaging layer 31, a second packaging layer 32 and a third packaging layer 33 which are sequentially arranged, wherein the third packaging layer 33 is adjacent to the light emitting layer 20, the first packaging layer 31 is positioned on one side, deviating from the third packaging layer 33, of the second packaging layer 32, the quantum dot color conversion layer 40 and the light emitting layer 20 can be protected by the packaging layer 30, the quantum dot color conversion layer 40 is prevented from being affected by water vapor, and the validity and the reliability of the quantum dot color conversion layer 40 are guaranteed.
Optionally, in the display panel provided in the embodiment of the present invention, the first encapsulation layer 31 and the third encapsulation layer 33 are inorganic encapsulation layers 30, and the second encapsulation layer 32 is an organic encapsulation layer 30.
Fig. 3 is a schematic diagram of another BB oriented film layer of the display panel according to the embodiment of the present invention, and fig. 3 details the structure of the quantum dot conversion layer.
Referring to fig. 3, in an alternative embodiment of the present invention, the light emitting elements P all emit light of the same color; the quantum dot color conversion layer 40 includes a first quantum dot structure 41, a second quantum dot structure 42, and a third quantum dot structure 43, and the first quantum dot structure 41, the second quantum dot structure 42, and the third quantum dot structure 43 overlap with different light emitting elements P along the first direction D1, and the light emitting colors of the first quantum dot structure 41, the second quantum dot structure 42, and the third quantum dot structure 43 are different from each other. Alternatively, along the first direction D1, different quantum dot structures respectively cover the light emitting elements corresponding thereto.
Specifically, in the display panel provided by the embodiment of the present invention, the quantum dot color conversion layer 40 includes a plurality of quantum dot structures, namely a first quantum dot structure 41, a second quantum dot structure 42, and a third quantum dot structure 43, and optionally, the colors of light rays emitted by the quantum dots of the first quantum dot structure 41, the second quantum dot structure 42, and the third quantum dot structure 43 are red, green, and blue, respectively. The light emitting elements P disposed on the light emitting layer 20 have the same light emitting color, so that when the light emitting layer 20 is formed, the vapor deposition of the light emitting material in all the light emitting elements P can be completed by using one mask process, which is beneficial to simplifying the manufacturing process of the display panel and improving the production efficiency of the display panel. In this embodiment, along the first direction D1, the first quantum dot structure 41, the second quantum dot structure 42, and the third quantum dot structure 43 are respectively overlapped with different light-emitting elements P, it can be understood that each light-emitting element P corresponds to one quantum dot structure, when light emitted by the light-emitting element P is irradiated to the corresponding quantum dot structure, quantum dots in the corresponding quantum dot structure can be excited to emit light of corresponding colors, and the display function of the display panel is implemented by the three quantum dot structures with different emission colors. Because the quantum dots in the quantum dot structure have narrower half peak width of the light-emitting spectrum and high light-emitting color purity, the mode of displaying by adopting the light-emitting of the quantum dot structure is favorable for effectively controlling the color point positions and the displayed color purity, and the whole display effect of the display panel is favorable for being improved.
In an alternative embodiment of the invention, the light emitting elements P are all blue light emitting elements P. Specifically, when the light emitting elements P are all set as blue light emitting elements P, blue light emitted by the blue light emitting elements P can excite the first quantum dot structure 41, the second quantum dot structure 42 and the third quantum dot structure 43 in the quantum dot color conversion layer 40 to emit light rays with different colors, and the color purity of light rays emitted by the quantum dot structures excited by the blue light is higher, which is more beneficial to improving the overall display effect of the display panel.
Fig. 4 is a schematic structural diagram of a first quantum dot structure 41, a second quantum dot structure 42, and a third quantum dot structure 43 in a display panel, in which fig. 4 represents quantum dot materials filled in different quantum dot structures in different filling shapes, but fig. 4 is only an illustration and does not limit the number and concentration of quantum dot structures actually filled in the quantum dot structures.
Referring to fig. 4, in an alternative embodiment of the present invention, the first quantum dot structure 41 includes a first color quantum dot material, the second quantum dot structure 42 includes a second color quantum dot material, and the third quantum dot structure 43 includes a third color quantum dot material, wherein the first color, the second color, and the third color are different from each other.
Optionally, in the display panel provided in the embodiment of the present invention, when the first quantum dot structure 41, the second quantum dot structure 42, and the third quantum dot structure 43 are introduced on the side of the light emitting layer 20 away from the substrate 00, quantum dot materials of a single color are introduced for different quantum dot structures, for example, a first color quantum dot material is introduced for the first quantum dot structure 41, a second color quantum dot material is introduced for the second quantum dot structure 42, and a third color quantum dot material is introduced for the third quantum dot structure 43, so that when the first quantum dot structure 41 is excited by light emitted by the light emitting element P, the first color quantum dot material in the first quantum dot structure 41 will be able to emit light of the first color and have higher purity; upon excitation of the second quantum dot structure 42, the second color quantum dot material in the second quantum dot structure 42 will be able to emit light of the second color and be of higher purity; when arousing third quantum dot structure 43, the third colour quantum dot material in third quantum dot structure 43 can send the light of third colour and the purity is higher, so, the purity of the light of sending through arousing three kinds of quantum dot structures is higher, more is favorable to improving display panel's whole display effect.
Fig. 5 is another schematic structural diagram of a first quantum dot structure 41, a second quantum dot structure 42, and a third quantum dot structure 43 in a display panel, in which fig. 5 represents quantum dot materials filled in different quantum dot structures in different filling shapes, but fig. 5 is only an illustration and does not limit the number and concentration of quantum dot structures actually filled in the quantum dot structures.
Referring to fig. 5, in an alternative embodiment of the present invention, at least one of the first quantum dot structure 41, the second quantum dot structure 42 and the third quantum dot structure 43 includes quantum dot materials of at least two colors.
Specifically, in the embodiment shown in fig. 5, the first quantum dot structure 41 is filled with quantum dot materials of two colors, and the second quantum dot structure 42 and the third quantum dot structure 43 are filled with quantum dot materials of only one color. Of course, in some other embodiments of the present invention, the second quantum dot structure 42 and/or the third quantum dot structure 43 may also be filled with quantum dot materials of at least two colors, which is not specifically limited by the present invention.
In consideration of different use requirements of users on the display panel, the embodiment of the invention can flexibly set the types of the colors of the quantum dot materials filled in the quantum dot structure. If the quantum dot materials filled in the three quantum dot structures are mainly red quantum dot materials, green quantum dot materials and blue quantum dot materials, if a user desires that the display effect is green, a certain amount of green quantum dot materials can be added in the quantum dot structure added with the red quantum dot materials and/or the quantum dot structure added with the blue quantum dot materials, so that the overall display effect of the display panel is green. In this way, the display effect of the display panel can be flexibly adjusted by limiting the color and the type of the quantum dot material added in the quantum dot structure. Of course, different quantum dot material addition modes can be adopted according to the actual requirements of users, and the above are only examples.
In some other embodiments of the present invention, when the quantum dot color conversion layer 40 is introduced into the display panel, the light emitting elements P in the light emitting layer 20 of the display panel can also be embodied as light emitting elements of at least three different colors, for example, please refer to fig. 6, and fig. 6 is another schematic diagram of BB oriented film layer of the display panel provided in the embodiment of the present invention. Alternatively, fig. 6 of the present embodiment represents the difference in the emission colors of the three light emitting elements P by differently filling the light emitting layers 20 of the light emitting elements P.
Referring to fig. 6, in an alternative embodiment of the present invention, the light emitting elements P include a first color light emitting element P1, a second color light emitting element P2 and a third color light emitting element P3, and the quantum dot color conversion layer 40 includes a first quantum dot structure 41, a second quantum dot structure 42 and a third quantum dot structure 43; along the first direction D1, the first color light emitting element P1 overlaps the first quantum dot structure 41, the second color light emitting element P2 overlaps the second quantum dot structure 42, and the third color light emitting element P3 overlaps the third quantum dot structure 43. Alternatively, along the first direction D1, the first quantum dot structure 41 covers the first color light emitting element P1, the second quantum dot structure 42 covers the second color light emitting element P2, and the third quantum dot structure 43 covers the third color light emitting element 43.
Specifically, in the display panel provided in the embodiment of the present invention, the light emitting colors of the light emitting elements P included in the light emitting layer 20 may also be different, for example, the light emitting elements P may include a first color light emitting element P1, a second color light emitting element P2, and a third color light emitting element P3, which have different light emitting colors, quantum dot structures are correspondingly disposed in the light emitting directions of the three color light emitting elements P, for example, a first quantum dot structure 41 is disposed on the light emitting surface of the first color light emitting element P1, and the light emitted by the first color light emitting element P1 can excite the first quantum dot structure 41 to emit light; a second quantum dot structure 42 is disposed on the light emitting surface of the second color light emitting element P2, and light emitted from the second color light emitting element P2 can excite the second quantum dot structure 42 to emit light; a third quantum dot structure 43 is disposed on the light emitting surface of the third color light emitting element P3, and the light emitted from the third color light emitting element P3 can excite the third quantum dot structure 43 to emit light. The light emitted by the light-emitting elements P with different colors excites different quantum dot structures to emit light, so that the positions of color points and color purity can be effectively controlled, optimization of corresponding color points is realized, and the display effect of the display panel is improved.
Optionally, the emission color of the quantum dot material included in the first quantum dot structure 41 is the same as the first color, the emission color of the quantum dot material included in the second quantum dot structure 42 is the same as the second color, and the emission color of the quantum dot material included in the third quantum dot structure 43 is the same as the third color. The quantum dot layer has a narrow half-peak width of three RGB colors and high color purity, and thus can realize a higher color gamut. For example, when the light emitting element P corresponding to red light is added with red light emitted by the quantum dot layer, a color gamut larger than the red light emitted by the original red light emitting element P can be obtained, thereby improving the overall display effect of the display panel.
In an alternative embodiment of the present invention, the first quantum dot structure 41 comprises a quantum dot material having a luminescent color different from the first color, and/or the second quantum dot structure 42 comprises a quantum dot material having a luminescent color different from the second color, and/or the third quantum dot structure 43 comprises a quantum dot material having a luminescent color different from the third color.
Specifically, in the structure of the display panel provided in this embodiment, the emission color of the quantum dot material included in at least one of the first quantum dot structure 41, the second quantum dot structure 42, and the third quantum dot structure 43 is different from the emission color of the corresponding light-emitting element P, and the corresponding scheme includes that the emission color of the quantum dot material included in any one of the first quantum dot structure 41, the second quantum dot structure 42, and the third quantum dot structure 43 is different from the emission color of the corresponding light-emitting element P, or the emission color of the quantum dot material included in any two of the first quantum dot structure 41, the second quantum dot structure 42, and the third quantum dot structure 43 is different from the emission color of the corresponding light-emitting element P, or the emission color of the quantum dot material included in the first quantum dot structure 41, the second quantum dot structure 42, and the third quantum dot structure 43 is different from the emission color of the corresponding light-emitting element P.
The mode that the light that adopts different luminescent color's light-emitting component P to send arouses the luminous of quantum dot structure is because the half peak width of quantum dot structure is narrower, and the color purity is high, and then arouses the colour gamut of the light that the quantum dot structure sent wider, consequently is favorable to promoting display panel's display effect more.
Fig. 7 is a schematic diagram of another BB oriented film layer of the display panel according to the embodiment of the present invention, and this embodiment shows a scheme in which thicknesses of quantum dot structures in the display panel are not completely the same.
Referring to fig. 7, in an alternative embodiment of the present invention, at least two of the first quantum dot structure 41, the second quantum dot structure 42 and the third quantum dot structure 43 have different thicknesses.
Specifically, for the first quantum dot structure 41, the second quantum dot structure 42, and the third quantum dot structure 43 provided in the embodiment of the present invention, setting the thickness of the quantum dot structure to be half wavelength of stimulated emission light of the quantum dot material may perform an anti-reflection function on the stimulated emission light. The thickness of the quantum dot structure needs to be determined according to the properties of the quantum dot material, and the stimulated emission wavelengths of the quantum dots of different materials are different, and in the embodiment of the invention, the thicknesses of different light quantum dot structures can be set according to the properties of the quantum dot material, so that the thicknesses of at least two of the first quantum dot structure 41, the second quantum dot structure 42 and the third quantum dot structure 43 of the different quantum dot structures are different, and optionally, the thicknesses of the three quantum dot structures are different, so that the stimulated emission light of the quantum dot materials in the different quantum dot structures can play a role in anti-reflection.
In practical applications, the thickness of the quantum dot structure can be flexibly set according to different light rays emitted by the light emitting element P. When the light emitted by the light emitting element P is all blue light, the efficiency of converting the blue light into the green light is related to the thickness of the green quantum dot structure, and the thicker the thickness of the green quantum dot structure is, the higher the efficiency of converting the blue light into the green light is. Therefore, the thickness of the green quantum dot structure can be made thicker than that of the blue quantum dot structure, so that the efficiency of converting blue light into green light is improved. In a similar way, the thickness of the red quantum dot structure can be made thicker, the efficiency of converting blue light into red light is improved, and the display effect of the display panel is improved.
Because the emission spectrum and the absorption spectrum of the green quantum dots are overlapped, the green light self-absorption phenomenon is obvious, the conversion rate is low, the occupation ratio of the green light in the white light is influenced, the thickness of the green quantum dot structure is properly reduced, the interference of the green light self-absorption on the white light emergent chromaticity is favorably reduced, and the white light emergent effect is improved. Optionally, the thickness of the blue light quantum dot structure is smaller than that of the green light quantum dot structure, and the thickness of the green light quantum dot structure is smaller than that of the red light quantum dot structure.
In an alternative embodiment of the present invention, at least two of the first, second and third quantum dot structures 41, 42, 43 comprise different concentrations of quantum dot material.
Alternatively, when the light emitting element P is a blue light emitting element P, since the absorption of blue light by the quantum dot is directly related to the number of quantum dots, the conversion efficiency is affected by the thickness of the quantum structure layer and the concentration of quantum dots in the quantum structure layer. Ideally, the larger the thickness of the quantum dot structure or the higher the concentration of the quantum dots, the higher the conversion efficiency. In this embodiment, the quantum dot concentrations of at least two of the first quantum dot structure 41, the second quantum dot structure 42, and the third quantum dot structure 43 are designed differently, so that the conversion efficiency of different quantum dot structures is improved according to the difference of quantum dot materials.
With continued reference to fig. 2, in an alternative embodiment of the invention, a quantum dot color conversion layer 40 is located between the third encapsulation layer 33 and the light emitting layer 20.
Specifically, when the quantum dot color conversion layer 40 is disposed between the third encapsulating layers 33 and the light emitting layer 20, after the light emitting layer 20 is fabricated, the quantum dot color conversion layer 40 is first formed on the side of the light emitting layer 20 away from the substrate 00, and then the third encapsulating layer 33, the second encapsulating layer 32 and the first encapsulating layer 31 are sequentially formed on the side of the quantum dot color conversion layer 40 away from the light emitting layer 20, so that the distance between the light emitting element P and the corresponding quantum dot color conversion layer 40 is reduced, which is beneficial to improving the color conversion efficiency. In addition, the quantum dot color conversion layer 40 and the light emitting layer 20 can be simultaneously encapsulated by the encapsulation layer 30, and a new encapsulation film layer does not need to be separately introduced into the quantum dot color conversion layer 40, so that the conversion efficiency of the quantum dot color conversion layer 40 to light rays is ensured, and the whole film layer structure of the display panel is facilitated to be simplified.
Fig. 8 and fig. 9 respectively show another BB-oriented film layer schematic diagram of the display panel according to the embodiment of the invention, please refer to fig. 8, in an alternative embodiment of the invention, the quantum dot color conversion layer 40 is located between the first encapsulation layer 31 and the second encapsulation layer 32, and/or, referring to fig. 9, the quantum dot color conversion layer 40 is located between the second encapsulation layer 32 and the third encapsulation layer 33.
Specifically, the embodiments of fig. 8 and 9 respectively show the structure that the quantum dot color conversion layer 40 is disposed in the encapsulation layer 30, and alternatively, the quantum dot color conversion layer 40 may be fabricated on the side of the third encapsulation layer 33 away from the light emitting layer 20 after the fabrication of the third encapsulation layer 33 is completed and before the fabrication of the second encapsulation layer 32, so that the quantum dot color conversion layer 40 may be encapsulated by the second encapsulation layer 32 and the first encapsulation layer 31; alternatively, the quantum dot color conversion layer 40 may be fabricated on the side of the second encapsulation layer 32 away from the light emitting layer 20 after the fabrication of the third encapsulation layer 33 and the second encapsulation layer 32 is completed and before the fabrication of the first encapsulation layer 31, so that the quantum dot color conversion layer 40 may be encapsulated by the first encapsulation layer 31. No matter which structure is adopted, a new packaging structure does not need to be additionally introduced into the quantum dot color conversion layer 40, so that the whole film layer structure of the display panel is favorably simplified.
Based on the same inventive concept, the present invention further provides a display device, fig. 10 is a schematic structural diagram of the display device according to the embodiment of the present invention, and referring to fig. 10, the display device according to the embodiment of the present invention includes the display panel according to any of the embodiments of the present invention.
It should be understood that the display device 200 provided in the embodiment of the present invention may be a computer, a mobile phone, a tablet, or other display devices with a display function, and the present invention is not limited thereto. The display device provided in the embodiment of the present invention has the beneficial effects of the display panel provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel in each of the above embodiments, which is not repeated herein.
In summary, the display panel and the display device provided by the invention at least achieve the following beneficial effects:
the display panel and the display device provided by the invention comprise a substrate, an array layer arranged on the substrate, a light-emitting layer arranged on one side of the array layer, which is far away from the substrate, and an encapsulation layer arranged on one side of the light-emitting layer, which is far away from the substrate. Particularly, in the embodiment of the invention, the quantum dot color conversion layer is further introduced between the light emitting layer and the first encapsulation layer, the quantum dot material has the advantages of high light emitting efficiency, narrow emission peak, high light emitting color purity and high color gamut, when the quantum dot color conversion layer is arranged in the light emitting direction of the light emitting layer, the light emitted by the light emitting element is utilized to excite the quantum dot color conversion layer to emit light, the color dot position and the color purity are effectively controlled, the optimization of corresponding color dots can be realized, and the overall display effect of the display panel is improved. In addition, the packaging layer is including the first packaging layer, second packaging layer and the third packaging layer that set gradually, and wherein, the third packaging layer is adjacent with the luminescent layer, and first packaging layer is located one side that the second packaging layer deviates from the third packaging layer, utilizes the packaging layer can protect quantum dot colour conversion layer, avoids quantum dot colour conversion layer to receive steam to influence, is favorable to guaranteeing quantum dot colour conversion layer's validity and reliability.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (12)
1. A display panel, comprising:
the array structure comprises a substrate and an array layer arranged on the substrate;
the light-emitting layer is positioned on one side, away from the substrate, of the array layer and comprises a plurality of light-emitting elements, and the light-emitting elements are electrically connected with the array layer;
the packaging layer comprises a first packaging layer, a second packaging layer and a third packaging layer which are stacked along a first direction, the second packaging layer is positioned between the first packaging layer and the third packaging layer, the third packaging layer is positioned between the second packaging layer and the light-emitting layer, and the first direction is the thickness direction of the display panel;
and the quantum dot color conversion layer is positioned between the luminous layer and the first packaging layer and is overlapped with the luminous element along the first direction.
2. The display panel according to claim 1, wherein the light emitting elements each emit light of the same color; the quantum dot color conversion layer comprises a first quantum dot structure, a second quantum dot structure and a third quantum dot structure, the first quantum dot structure, the second quantum dot structure and the third quantum dot structure are respectively overlapped with different light-emitting elements along the first direction, and the light-emitting colors of the first quantum dot structure, the second quantum dot structure and the third quantum dot structure are different from each other.
3. The display panel according to claim 2, wherein the light-emitting elements are all blue light-emitting elements.
4. The display panel of claim 2 wherein the first quantum dot structure comprises a first color quantum dot material, the second quantum dot structure comprises a second color quantum dot material, and the third quantum dot structure comprises a third color quantum dot material, the first color, the second color, and the third color being different.
5. The display panel of claim 4, wherein at least one of the first quantum dot structure, the second quantum dot structure, and the third quantum dot structure comprises quantum dot material of at least two colors.
6. The display panel according to claim 1, wherein the light-emitting elements include a first color light-emitting element, a second color light-emitting element, and a third color light-emitting element, and wherein the quantum dot color conversion layer includes a first quantum dot structure, a second quantum dot structure, and a third quantum dot structure; along the first direction, the first color light emitting element overlaps a first quantum dot structure, the second color light emitting element overlaps the second quantum dot structure, and the third color light emitting element overlaps the third quantum dot structure.
7. The display panel according to claim 6, wherein the first quantum dot structure comprises a quantum dot material having a different emission color than the first color, and/or wherein the second quantum dot structure comprises a quantum dot material having a different emission color than the second color, and/or wherein the third quantum dot structure comprises a quantum dot material having a different emission color than the third color.
8. The display panel according to claim 2 or 6, wherein at least two of the first quantum dot structure, the second quantum dot structure, and the third quantum dot structure have different thicknesses.
9. The display panel according to claim 2 or 6, wherein at least two of the first quantum dot structure, the second quantum dot structure, and the third quantum dot structure contain different concentrations of quantum dot materials.
10. The display panel of claim 1, wherein the quantum dot color conversion layer is between the third encapsulation layer and the light emitting layer.
11. The display panel according to claim 1, wherein the quantum dot color conversion layer is located between the first and second encapsulation layers, and/or wherein the quantum dot color conversion layer is located between the second and third encapsulation layers.
12. A display device characterized by comprising the display panel according to any one of claims 1 to 11.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211434083.6A CN115696947A (en) | 2022-11-16 | 2022-11-16 | Display panel and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211434083.6A CN115696947A (en) | 2022-11-16 | 2022-11-16 | Display panel and display device |
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| CN115696947A true CN115696947A (en) | 2023-02-03 |
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| CN202211434083.6A Pending CN115696947A (en) | 2022-11-16 | 2022-11-16 | Display panel and display device |
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