CN111261662A - OLED display panel and OLED display device - Google Patents
OLED display panel and OLED display device Download PDFInfo
- Publication number
- CN111261662A CN111261662A CN201811449996.9A CN201811449996A CN111261662A CN 111261662 A CN111261662 A CN 111261662A CN 201811449996 A CN201811449996 A CN 201811449996A CN 111261662 A CN111261662 A CN 111261662A
- Authority
- CN
- China
- Prior art keywords
- light
- sub
- pixel
- color
- oled display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- 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]
Abstract
The invention provides an OLED display panel and an OLED display device, and relates to the technical field of display, in order to improve the color saturation of the OLED display panel and prevent the OLED display panel from color crosstalk. The OLED display panel comprises a plurality of pixels which are arranged in an array, each pixel comprises at least three sub-pixels, and each sub-pixel can display light of one color; the sub-pixels comprise light emitting elements, each light emitting element can emit first color light, and the wavelength of the first color light is less than or equal to the wavelength of light which can be displayed by any sub-pixel; the sub-pixel also comprises a light condensing structure positioned on the light emitting side of the light emitting element facing the light emitting element; in each pixel, quantum dots are dispersed in the light condensing structures in at least two sub-pixels, and the quantum dots absorb the first color light emitted by the light emitting element and emit light corresponding to one color displayable by the sub-pixels. The OLED display panel provided by the invention is used for displaying pictures.
Description
Technical Field
The invention relates to the technical field of display, in particular to an OLED display panel and an OLED display device.
Background
Organic Light Emitting Diode (OLED) devices, also called Organic electroluminescent Diode devices, have attracted attention because of their advantages of self-luminescence, rich colors, fast response, wide viewing angle, Light weight, thin thickness, low power consumption, and flexible display, and OLED display devices made of OLED devices are regarded as display devices with great application prospects.
The OLED display device generally includes an OLED display panel, where a plurality of pixels are arranged in an array, and each pixel includes a corresponding number of sub-pixels according to a color matching mode of the OLED display panel, for example, when the OLED display panel adopts an RGB (Red, Green, Blue) color matching mode, each pixel may include three sub-pixels, where one sub-pixel is an R sub-pixel, one sub-pixel is a G sub-pixel, and one sub-pixel is a B sub-pixel, and each sub-pixel includes a light emitting element, and a light emitting layer in the light emitting element is excited by an exciton formed by combining a hole and an electron to emit light of a corresponding color. However, in the above-mentioned OLED display panel, the spectrum of light emitted by the light-emitting layer of the light-emitting element after being excited is wide, and the light-emitting efficiency, lifetime, temperature influence, and the like of each light-emitting element are not uniform, so that the color saturation of the OLED display panel is generally low; in addition, in the above-mentioned OLED display panel, when the light-emitting layer in the light-emitting element emits light after being excited, the light is generally emitted to the periphery of the light-emitting element, so that the phenomenon of color crosstalk of the OLED display panel may occur.
Disclosure of Invention
In view of the foregoing problems, embodiments of the present invention provide an OLED display panel and an OLED display device, which are used to improve the color saturation of the OLED display panel and prevent the color crosstalk of the OLED display panel.
In order to achieve the above purpose, the invention provides the following technical scheme:
a first aspect of embodiments of the present invention provides an OLED display panel, which includes a plurality of pixels arranged in an array, each of the pixels includes at least three sub-pixels, and each of the sub-pixels can display light of one color; the sub-pixels comprise light emitting elements, each light emitting element can emit first color light, and the wavelength of the first color light is less than or equal to the wavelength of light which can be displayed by any sub-pixel; the sub-pixel also comprises a light condensing structure positioned on the light emitting side of the light emitting element facing the light emitting element; in each pixel, quantum dots are dispersed in the light condensing structures in at least two sub-pixels, and the quantum dots absorb the first color light emitted by the light emitting element and emit light corresponding to one color displayable by the sub-pixels.
In the OLED display panel provided in the embodiments of the present invention, the light emitting elements in each sub-pixel can emit the first color light, that is, the light emitting elements can emit the same color light, and each light emitting element is the same, and it can also be understood that the material of the light emitting layer in each light emitting element is the same, so that compared with the prior art in which the light emitting elements of each sub-pixel are different from each other, the uniformity of the light emitting efficiency, lifetime, temperature influence, and the like of the light emitting element of each sub-pixel can be improved, so as to improve the color saturation of the OLED display panel, and meanwhile, in the OLED display panel provided in the embodiments of the present invention, the quantum dots in the light collecting structure of each sub-pixel are used to absorb the first color light emitted by the light emitting element and emit light corresponding to one color displayable by the sub-pixel, so that the spectrum of the light displayed by the sub-pixel is narrower, thereby further improving the color saturation of the OLED display panel. In addition, in the OLED display panel provided in the embodiment of the present invention, each sub-pixel includes a light gathering structure located on a light emitting side of the light emitting element facing the light emitting element, and the light gathering structure can gather light passing through the light gathering structure, so as to prevent light emitted from the sub-pixel from entering a range adjacent to the sub-pixel, and in particular, prevent light converted by quantum dots from entering quantum dots adjacent to the sub-pixel, thereby preventing the color crosstalk phenomenon of the OLED display panel.
Preferably, the light-condensing structure is a convex lens. At this time, the light condensing structure may only include a layer of convex lens, which may reduce the thickness and manufacturing difficulty of the light condensing structure.
Preferably, the side of the convex lens facing away from the light emitting element is an arc surface, and the radian of the arc surface of the convex lens facing away from the light emitting element is matched with the wavelength of light which can be displayed by the corresponding sub-pixel and the refractive index of the convex lens, so that light emitted from one side of the convex lens facing away from the light emitting element is not incident on the convex lens adjacent to the convex lens. The light emitted by the convex lens is prevented from being incident into the convex lens adjacent to the convex lens, namely, the light emitted by the convex lens is enabled to avoid the convex lens adjacent to the convex lens, so that the crosstalk of the light displayed by the adjacent sub-pixels can be prevented, the phenomenon of color cross in the pixels is prevented, and the color purity of the color displayed by the pixels is improved.
Optionally, the light-gathering structure is a biconvex lens or a plano-convex lens with a cambered surface on the side facing away from the light-emitting element.
Optionally, a light blocking structure is arranged between two adjacent light gathering structures. The arrangement of the light blocking structure prevents the light emitted by the light condensing structure from entering the range adjacent to the sub-pixel, thereby preventing the light displayed by the adjacent sub-pixel from crosstalk, preventing the phenomenon of color crosstalk in the pixel and improving the color purity of the color displayed by the pixel.
Optionally, the light emitting element emits light of the first color, which is the same as the color of light displayable by one of the sub-pixels.
Optionally, in the sub-pixel displaying light with the same color as the first color light, the light-gathering structure is a transparent light-gathering structure, so as to simplify the manufacturing process steps of the OLED display panel and reduce the cost; or, in the sub-pixels displaying light with the same color as the first color light, quantum dots are dispersed in the light condensing structure, so that the spectrum of the light displayed by each sub-pixel is narrower, the saturation of the light displayed by each sub-pixel is improved, and the color saturation of the OLED display panel is further improved.
Optionally, an isolation layer is disposed between the light-gathering structure and the light-emitting element. The light-emitting element can be packaged and protected, the light-emitting element is prevented from being corroded by water and oxygen in the subsequent manufacturing process, meanwhile, the isolation layer enables the light-gathering structure and the light-emitting element to be separated by a certain distance, and the optical effect of the light-gathering structure on the first color light emitted by the light-emitting element is improved.
Optionally, a pixel defining structure is disposed between two adjacent light emitting elements, and the isolation layer covers the light emitting elements and the pixel defining structure. The arrangement of the pixel defining structure defines a sub-pixel area, and meanwhile, the light of the first color emitted by the light emitting element can be prevented from being mixed into the range of the sub-pixel adjacent to the light emitting element, so that the crosstalk of the light displayed by the adjacent sub-pixel can be prevented, the color mixing phenomenon in the pixel can be prevented, and the color purity of the color displayed by the pixel can be improved.
Optionally, a protective layer is further disposed on a side of the light-gathering structure facing away from the light-emitting element, and a refractive index of the light-gathering structure is greater than a refractive index of the protective layer. The protective layer can protect the light condensation structure, and the light condensation structure is prevented from being easily damaged such as scratches when exposed outside.
A second aspect of the embodiments of the present invention provides an OLED display device, which includes the OLED display panel according to the above technical solution.
The advantages of the OLED display device and the OLED display panel are the same as those of the OLED display panel in the prior art, and are not described herein again.
In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions, other technical problems solved by the OLED display panel and the OLED display device provided by the embodiments of the present invention, other technical features included in the technical solutions, and advantages brought by the technical features will be further described in detail in the detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an OLED display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another OLED display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another OLED display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another OLED display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another OLED display panel according to an embodiment of the present invention.
Description of reference numerals:
10-array substrate, 11-B sub-pixels,
12-G sub-pixels, 13-R sub-pixels,
14-W sub-pixels, 111-blue quantum dots,
121-green quantum dots, 131-red quantum dots,
21-light emitting element, 22-pixel defining structure,
23-an isolation layer, 231-a planarization layer,
232-an encapsulation layer, 24-a light-gathering structure,
25-light blocking structure, 26-protective layer.
Detailed Description
In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As described in the background art, the OLED display panel in the prior art has the problems of low color saturation and color crosstalk, and the inventor researches and discovers that, in the pixels of the OLED display panel in the prior art, the light emitting efficiency, the service life, the temperature influence, and the like of the light emitting element of each sub-pixel are all non-uniform, and the spectrum of the light emitted after the light emitting layer in the light emitting element is excited is wide, so that the color saturation of the OLED display panel is low; in addition, in the conventional OLED display panel, when a light emitting layer in the light emitting element emits light after being excited, the light is generally emitted to the periphery of the light emitting element, so that the OLED display panel may generate a color crosstalk phenomenon.
For the above reasons, referring to fig. 1 to 4, an OLED display panel according to an embodiment of the present invention includes a plurality of pixels arranged in an array, each pixel includes at least three sub-pixels, each sub-pixel can display light of one color, each sub-pixel includes a light emitting element 21, each light emitting element 21 can emit light of a first color, and a wavelength of the light of the first color is smaller than or equal to a wavelength of light displayable by any sub-pixel; the sub-pixel further comprises a light-concentrating structure 24 located at the light-emitting side of the light-emitting element 21 towards the light-emitting element; in each pixel, the light condensing structures 24 in at least two sub-pixels are dispersed with quantum dots that absorb the first color light emitted from the light emitting element 21 and emit light corresponding to one color displayable by the sub-pixel.
In the OLED display panel provided in the embodiment of the present invention, the plurality of pixels are arranged in an array, each pixel includes at least three sub-pixels, each sub-pixel can emit light of one color, and the arrangement form of the sub-pixels can be set according to the color matching mode of the OLED display panel.
For example, the OLED display panel provided in the embodiment of the present invention may adopt an RGB (Red, Green, Blue) color matching mode, and specifically, referring to fig. 1, the OLED display panel includes an array substrate 10, generally, the array substrate 10 includes a substrate and a thin film transistor array disposed on the substrate, a plurality of pixels are arranged at corresponding positions on the array substrate 10 in an array, each pixel includes three sub-pixels, one of the sub-pixels is an R sub-pixel 13, the R sub-pixel 13 may display Red light, one of the sub-pixels is a G sub-pixel 12, the G sub-pixel 12 may display Green light, one of the sub-pixels is a B sub-pixel 11, and the B sub-pixel 11 may display Blue light; each sub-pixel comprises a light emitting element 21, the light emitting elements 21 are disposed on the array substrate 10, each light emitting element 21 can emit a first color light, that is, the light emitting elements 21 can emit light of the same color, or the light emitting layer in each light emitting element 21 can be made of the same material, and the wavelength of the first color light is smaller than or equal to the wavelength of the light displayable by any sub-pixel, for example, the light emitting element 21 can be set to emit the first color light as violet light, and in this case, the wavelength of the first color light is smaller than the wavelength of light displayable by any of the R sub-pixel 13, the G sub-pixel 12 and the B sub-pixel 11, alternatively, the light emitting element 21 may be configured to emit the first color light as blue light, in which case the wavelength of the first color light is equal to the wavelength of light displayable by the B sub-pixel 11, and the wavelength of the first color light is smaller than the wavelength of light displayable by any of the R sub-pixel 13 and the G sub-pixel 12.
As shown in fig. 1, each sub-pixel further includes a light-gathering structure 24 located on the light-emitting side of the light-emitting element 21 facing the light-emitting element, for example, if the upper side of the OLED display panel in fig. 1 is the display side of the OLED display panel, the light-gathering structure 24 is located above the light-emitting element 21 to gather the light emitted by the light-emitting element 21; in each pixel, quantum dots are dispersed in the light-condensing structures 24 of at least two sub-pixels, the quantum dots absorb the first color light emitted by the light-emitting element 21 and emit light corresponding to one color that can be displayed by the sub-pixels, specifically, referring to fig. 1, each pixel includes three sub-pixels of an R sub-pixel 13, a G sub-pixel 12 and a B sub-pixel 11, the light-emitting element 21 in each sub-pixel can emit the first color light, the first color light can be purple light, indigo light, blue light, and the like, red quantum dots 131 are dispersed in the light-condensing structure 24 of the R sub-pixel 13, green quantum dots 121 are dispersed in the light-condensing structure 24 of the G sub-pixel 12, blue quantum dots 111 are dispersed in the light-condensing structure 24 of the B sub-pixel 11, and when the OLED display panel displays a picture, the red quantum dots 131 in the light-condensing structure 24 of the R sub-pixel 13 absorb the first color light emitted by the corresponding light-emitting element 21, under the excitation of the first color light, red light is emitted, the red light is converged and emitted through the light converging structure 24, so that the R sub-pixel 13 displays red light, green quantum dots 121 in the light converging structure 24 of the G sub-pixel 12 absorb the first color light emitted by the corresponding light emitting element 21, and under the excitation of the first color light, green light is emitted, the green light is converged and emitted through the light converging structure 24, so that the G sub-pixel 12 displays green light, and blue quantum dots 111 in the light converging structure 24 of the B sub-pixel 11 absorb the first color light emitted by the corresponding light emitting element 21, and under the excitation of the first color light, blue light is emitted, and the blue light is converged and emitted through the light converging structure 24, so that the B sub-pixel 11 displays blue light, and thus, the pixel displays light of the corresponding color, and the image display of the OLED display panel is realized.
In the above embodiment, quantum dots are dispersed in the light-gathering structure 24 of each sub-pixel, in practical application, when the wavelength of the light of the first color emitted by the light-emitting element 21 is equal to the wavelength of the light that can be displayed by one of the sub-pixels, referring to fig. 2, quantum dots may not be dispersed in the light-gathering structure 24 of the sub-pixel that displays the same light as the first color, specifically, each pixel includes three sub-pixels of R sub-pixel 13, G sub-pixel 12, and B sub-pixel 11, the light-emitting element 21 in each sub-pixel can emit blue light, red quantum dots 131 are dispersed in the light-gathering structure 24 of the R sub-pixel 13, green quantum dots 121 are dispersed in the light-gathering structure 24 of the G sub-pixel 12, blue quantum dots 111 are not dispersed in the light-gathering structure 24 of the B sub-pixel 11, and when the OLED display panel displays a picture, the red quantum dots 131 in the light-gathering structure 24 of the R sub-pixel 13 absorb the blue light emitted by the corresponding light-emitting element 21, under the excitation of blue light, red light is emitted, the red light is gathered and emitted through the light gathering structure 24, and red light is displayed by the R sub-pixel 13, the green quantum dots 121 in the light gathering structure 24 of the G sub-pixel 12 absorb the blue light emitted by the corresponding light emitting element 21, and under the excitation of the blue light, green light is emitted, the green light is gathered and emitted through the light gathering structure 24, and green light is displayed by the G sub-pixel 12, and the light emitting element 21 in the B sub-pixel 11 emits first color light, namely blue light, the first color light penetrates through the corresponding light gathering structure 24, and is gathered and emitted through the light gathering structure 24, and blue light is displayed by the B sub-pixel 11, so that the pixel displays the light with the corresponding color, and the image display of the OLED display panel is realized.
In the above embodiment, the OLED display panel adopts an RGB color matching mode, and in practical application, the OLED display panel may also adopt an RGBW (Red, Green, Blue, White) color matching mode, specifically, referring to fig. 4, the OLED display panel includes an array substrate 10, a plurality of pixels are arranged in an array at corresponding positions on the array substrate 10, each pixel includes four sub-pixels, wherein one sub-pixel is an R sub-pixel 13, the R sub-pixel 13 may display Red light, one sub-pixel is a G sub-pixel 12, the G sub-pixel 12 may display Green light, one sub-pixel is a B sub-pixel 11, the B sub-pixel 11 may display Blue light, one sub-pixel is a W sub-pixel 14, and the W sub-pixel 14 may display White light; each sub-pixel includes a light emitting element 21, the light emitting elements 21 are located on the array substrate 10, and each light emitting element 21 can emit a first color light, that is, the color of light emitted by each light emitting element 21 is the same, it can also be understood that the material of the light emitting layer in each light emitting element 21 is the same, and the wavelength of the first color light is smaller than or equal to the wavelength of light that can be displayed by any sub-pixel.
As shown in fig. 4, each sub-pixel further includes a light-gathering structure 24 located on the light-emitting side of the light-emitting element 21 facing the light-emitting element, for example, if the upper side of the OLED display panel in fig. 4 is the display side of the OLED display panel, the light-gathering structure 24 is located above the light-emitting element 21 to gather the light emitted by the light-emitting element 21; in each pixel, quantum dots are dispersed in the light-condensing structure 24 of at least two sub-pixels, the quantum dots absorb the first color light emitted by the light-emitting element 21 and emit light corresponding to one color that can be displayed by the sub-pixels, for example, as shown in fig. 4, each pixel includes four sub-pixels of R sub-pixel 13, G sub-pixel 12, B sub-pixel 11, and W sub-pixel 14, the light-emitting element 21 in each sub-pixel can emit the first color light, which can be purple light, indigo light, blue light, etc., red quantum dots 131 are dispersed in the light-condensing structure 24 of the R sub-pixel 13, green quantum dots 121 are dispersed in the light-condensing structure 24 of the G sub-pixel 12, blue quantum dots 111 are dispersed in the light-condensing structure 24 of the B sub-pixel 11, red quantum dots 131, green quantum dots 121, and blue quantum dots 111 are dispersed in the light-condensing structure 24 of the W sub-pixel 14, when the OLED display panel displays a picture, the red quantum dots 131 in the light-gathering structure 24 of the R sub-pixel 13 absorb the first color light emitted by the corresponding light-emitting element 21, and emit red light under the excitation of the first color light, the red light is gathered and emitted by the light-gathering structure 24, so that the R sub-pixel 13 displays red light, the green quantum dots 121 in the light-gathering structure 24 of the G sub-pixel 12 absorb the first color light emitted by the corresponding light-emitting element 21, and emit green light under the excitation of the first color light, the green light is gathered and emitted by the light-gathering structure 24, so that the G sub-pixel 12 displays green light, the blue quantum dots 111 in the light-gathering structure 24 of the B sub-pixel 11 absorb the first color light emitted by the corresponding light-emitting element 21, and emit blue light under the excitation of the first color light, the blue light is gathered and emitted by the light-gathering structure 24, so that the B sub-pixel 11 displays blue light, the red quantum dots 131, the green light, and the green light, The green quantum dots 121 and the blue quantum dots 111 absorb the first color light emitted by the corresponding light emitting elements 21, and respectively emit red light, green light and blue light under the excitation of the first color light, the red light, the green light and the blue light are mixed to form white light, and the white light is gathered and emitted through the light gathering structure 24, so that the pixels display the light of the corresponding color, and the image display of the OLED display panel is realized.
Or, referring to fig. 5, each pixel includes four sub-pixels of an R sub-pixel 13, a G sub-pixel 12, a B sub-pixel 11, and a W sub-pixel 14, light emitting devices 21 in each sub-pixel can emit blue light, red quantum dots 131 are dispersed in a light condensing structure 24 of the R sub-pixel 13, green quantum dots 121 are dispersed in the light condensing structure 24 of the G sub-pixel 12, quantum dots are not dispersed in the light condensing structure 24 of the B sub-pixel 11, red quantum dots 131, green quantum dots 121, and blue quantum dots 111 are dispersed in the light condensing structure 24 of the W sub-pixel 14, when an OLED display panel displays a picture, the red quantum dots 131 in the light condensing structure 24 of the R sub-pixel 13 absorb the blue light emitted by the corresponding light emitting device 21 and emit red light under excitation of the blue light, and the red light is condensed by the light condensing structure 24 to realize that the R sub-pixel 13 displays red light, the green quantum dots 121 in the light condensing structure 24 of the G sub-pixel 12 absorb the blue light emitted by the corresponding light emitting device 21, under the excitation of blue light, green light is emitted, the green light is gathered and emitted through the light gathering structure 24, the G sub-pixel 12 is enabled to display the green light, the light emitting element 21 in the B sub-pixel 11 emits first color light, namely the blue light, the first color light penetrates through the corresponding light gathering structure 24, and is gathered and emitted through the light gathering structure 24, the B sub-pixel 11 is enabled to display the blue light, the red quantum dot 131, the green quantum dot 121 and the blue quantum dot 111 in the light gathering structure 24 of the W sub-pixel 14 absorb the blue light emitted by the corresponding light emitting element 21, and under the excitation of the blue light, the red light, the green light and the blue light are respectively emitted, the red light, the green light and the blue light are mixed to form white light, the white light is gathered and emitted through the light gathering structure 24, so that the pixel displays the light of the corresponding color, and the.
As can be seen from the above description, in the OLED display panel provided in the embodiment of the present invention, the light emitting elements 21 in each sub-pixel can emit the first color light, that is, the light emitting elements 21 can emit the same color, and the light emitting elements 21 can be the same, and it can also be understood that the material of the light emitting layer in each light emitting element 21 is the same, so that compared with the prior art in which the light emitting elements 21 of each sub-pixel are different, the uniformity of the light emitting efficiency, lifetime, temperature influence, and the like of the light emitting elements 21 of each sub-pixel can be improved, so as to improve the color saturation of the OLED display panel, and meanwhile, in the OLED display panel provided in the embodiment of the present invention, the first color light emitted by the light emitting elements 21 is absorbed by the quantum dots in the light collecting structure 24 of each sub-pixel, and the light corresponding to one color which can be displayed by the sub-pixel is emitted, so that the sub-pixel displays the light corresponding to the color, the spectrum of light displayed by the sub-pixels is narrow, and therefore the color saturation of the OLED display panel is further improved.
In addition, in the OLED display panel provided in the embodiment of the present invention, each sub-pixel includes the light-gathering structure 24 located on the light-emitting side of the light-emitting element 21 facing the light-emitting element, and the light-gathering structure 24 can gather light transmitted through the light-gathering structure 24, so as to prevent light emitted from the sub-pixel from entering a range adjacent to the sub-pixel, and in particular, prevent light converted by quantum dots from entering quantum dots adjacent to the sub-pixel, for example, prevent green light emitted after conversion by green quantum dots in G sub-pixel from entering red quantum dots in R sub-pixel adjacent to the G sub-pixel, and green light entering the red quantum dots can be converted into red under the action of the red quantum dots to cause cross color, so that the phenomenon of cross color of the OLED display panel can be prevented, and the color purity of the color displayed by the pixel can be improved.
Furthermore, in the OLED display panel provided in the embodiment of the present invention, the light emitting elements 21 in each sub-pixel can emit the first color light, that is, the light emitting elements 21 can emit the same color light, and the light emitting elements 21 are the same, which can also be understood as that the light emitting layers in the light emitting elements 21 are the same, and compared with the prior art in which the light emitting elements 21 of each sub-pixel are different from each other, when the OLED display panel is manufactured, there is no need to form the light emitting layers of the light emitting elements 21 multiple times, which reduces the process steps for manufacturing the OLED display panel, improves the efficiency, and reduces the cost.
The OLED display panel of the embodiment of the present invention is configured in an OLED display device, and the OLED display device may be applied to different devices, for example, mobile devices such as a mobile phone, a tablet computer, an electronic book, and a vehicle-mounted display, which are not described herein again.
In the OLED display panel provided in the above embodiment, the light gathering structure 24 in the sub-pixel is configured to gather light passing through the light gathering structure 24, and the light gathering structure 24 may be in various forms, for example, the light gathering structure 24 may be formed by a plurality of lenses arranged in a stacked manner, or the light gathering structure 24 may be formed by a lens whose light incident surface or/and light exit surface is an anisotropic curved surface and is configured to gather light passing through the light gathering structure 24. In the embodiment of the present invention, please refer to fig. 1 to fig. 5, the light-gathering structure 24 may be a convex lens, and at this time, the light-gathering structure 24 may include only a convex lens layer, which can reduce the thickness of the light-gathering structure 24 to reduce the thickness of the OLED display panel, thereby facilitating the light and thin design of the OLED display panel; meanwhile, the light condensing structure 24 may only include a convex lens layer, and the light incident surface and the light emitting surface are both regular curved surfaces, so that the manufacturing difficulty of the light condensing structure 24 can be reduced, the manufacturing difficulty of the OLED display panel is reduced, and the cost is reduced.
In the above embodiment, the light-gathering structure 24 may be a convex lens, and in practical application, referring to fig. 1, the light-gathering structure 24 may be a plano-convex lens, and a convex surface of the plano-convex lens faces away from the light-emitting element 21, or referring to fig. 3, the light-gathering structure 24 may also be a biconvex lens. In the embodiment of the present invention, the light-focusing structure 24 is preferably a plano-convex lens, so that it is not necessary to form a concave pit on the structure below the light-focusing structure 24, which facilitates the manufacture of the light-focusing structure 24, reduces the process steps for manufacturing the OLED display panel, improves the efficiency, and reduces the cost.
In the above embodiment, when the light-gathering structure 24 is a convex lens, the side of the convex lens opposite to the light-emitting element 21 is an arc surface, for example, referring to fig. 1, the light-gathering structure 24 is located above the light-emitting element 21, that is, the convex lens is located above the light-emitting element 21, and the upper surface of the convex lens is an arc surface, at this time, the arc degree of the upper surface of the convex lens can be set according to the wavelength of light that can be displayed by the corresponding sub-pixel and the refractive index of the convex lens, for example, the arc degree of the upper surface of the convex lens is matched with the wavelength of light that can be displayed by the corresponding sub-pixel and the refractive index of the convex lens, so that light emitted through the upper surface of the convex lens is not incident into the convex lens adjacent to the convex lens, that is emitted through the upper surface of the convex lens, and thus, crosstalk of light displayed by the adjacent sub-pixels can be prevented, and cross color phenomenon in the pixel can be prevented, the color purity of the color displayed by the pixel is improved.
Referring to fig. 1 to fig. 5, in the OLED display panel according to the embodiment of the invention, a light blocking structure 25 may be further disposed between two adjacent light collecting structures 24, for example, the light blocking structure 25 may be a black matrix, or the light blocking structure 25 may also be a reflective wall. The light blocking structure 25 prevents the light emitted from the light gathering structure 24 from entering the range adjacent to the sub-pixel, thereby preventing the crosstalk of the light displayed by the adjacent sub-pixel, preventing the color crosstalk in the pixel, and improving the color purity of the color displayed by the pixel.
In the above embodiment, the sub-pixels include the light emitting elements 21, and the light emitting elements 21 of each sub-pixel can emit the first color light, in practical applications, the first color light emitted by the light emitting elements 21 may be different from the color of light displayable by any sub-pixel, or the first color light emitted by the light emitting elements 21 may be the same as the color of light displayable by one sub-pixel. In the embodiment of the present invention, it is preferable that the first color light emitted by the light emitting element 21 is the same as the color of light that can be displayed by one of the sub-pixels, for example, the first color light emitted by the light emitting element 21 may be set to blue light.
When the first color light emitted by the light emitting element 21 is set to be the same as the color of light which can be displayed by one of the sub-pixels, and the sub-pixel displays the light with the same color as the first color light, the light condensing structure 24 may be a transparent light condensing structure 24, specifically, referring to fig. 2, fig. 3 or fig. 5, the pixel in the OLED display panel includes a B sub-pixel 11, the B sub-pixel 11 displays blue light, and the first color light emitted by the light emitting element 21 is set to be blue light, at this time, the light condensing structure 24 of the B sub-pixel 11 is a transparent light condensing structure 24, and no dispersed quantum dots are arranged in the light condensing structure 24 of the B sub-pixel 11, and when the OLED display panel displays a picture, the blue light emitted by the light emitting element 21 of the B sub-pixel 11 passes through the transparent light condensing structure 24 and is condensed and emitted under the effect of the transparent light condensing structure 24, so that the B sub-pixel 11 displays blue light, and thus, the, and reduces the cost.
Or, in the sub-pixel displaying the light with the same color as the first color light, the light-gathering structure 24 also has quantum dots dispersed therein, specifically, referring to fig. 1 or fig. 4, the pixel in the OLED display panel includes a B sub-pixel 11, the B sub-pixel 11 displays blue light, the first color light emitted by the light-emitting element 21 is set as blue light, at this time, the light-gathering structure 24 of the B sub-pixel 11 has blue quantum dots 111 dispersed therein, when the OLED display panel displays a picture, blue light emitted from the light emitting element 21 of the B sub-pixel 11 is incident into the light collecting structure 24, the blue quantum dots 111 absorb the blue light, and emit the blue light under excitation of the blue light, the blue light is gathered and emitted under the action of the light gathering structure 24, so that the sub-pixel 11B displays the blue light, and thus, the spectrum of the blue light displayed by the B sub-pixel 11 can be made narrower, the saturation of the blue light displayed by the B sub-pixel 11 is improved, and the color saturation of the OLED display panel is further improved.
Referring to fig. 1 to 5, in the embodiment of the invention, the light-gathering structure 24 is located on a side of the light-emitting element 21 facing the display side of the OLED display panel, an isolation layer 23 is disposed between the light-gathering structure 24 and the light-emitting element 21, the isolation layer 23 may include a planarization layer 231 and an encapsulation layer 232, the planarization layer 231 covers the array substrate 10 and the light-emitting element 21, and the encapsulation layer 232 is a thin film encapsulation layer and is located on the planarization layer 231. The arrangement of the isolation layer 23 can encapsulate and protect the light emitting element 21, and prevent the light emitting element 21 from being corroded by water and oxygen in the subsequent manufacturing process, meanwhile, the isolation layer 23 can enable the light condensing structure 24 and the light emitting element 21 to be spaced at a certain distance, and the optical effect of the light condensing structure 24 on the first color light emitted by the light emitting element 21 is improved.
With reference to fig. 1 to fig. 5, in the embodiment of the invention, a pixel defining structure 22 is further disposed between two adjacent light emitting devices 21, and an isolation layer 23 covers the light emitting devices 21 and the pixel defining structure 22, that is, the isolation layer 23 encapsulates the pixel defining structure 22 and the light emitting devices 21 together. The pixel definition structure 22 defines a sub-pixel region, and simultaneously, can prevent light of the first color emitted by the light emitting element 21 from entering the range of the sub-pixel adjacent to the light emitting element 21, can prevent crosstalk of light displayed by the adjacent sub-pixels, prevent a color crosstalk phenomenon in the pixel, and improve the color purity of the color displayed by the pixel.
Referring to fig. 1 to fig. 5, in the embodiment of the invention, a protective layer 26 is further disposed on a side of the light-gathering structure 24 opposite to the light-emitting element 21, and a refractive index of the light-gathering structure 24 is greater than a refractive index of the protective layer 26. The protective layer 26 is disposed to protect the light-focusing structure 24 and prevent the light-focusing structure 24 from being easily damaged, such as being scratched, when exposed.
The embodiment of the invention also provides an OLED display device, which further comprises the OLED display panel in the embodiment.
The advantages of the OLED display device and the OLED display panel are the same as those of the OLED display panel in the prior art, and are not described herein again.
In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An OLED display panel comprises a plurality of pixels arranged in an array, each pixel comprises at least three sub-pixels, and each sub-pixel can display light of one color; it is characterized in that the preparation method is characterized in that,
the sub-pixels comprise light emitting elements, each light emitting element can emit first color light, and the wavelength of the first color light is less than or equal to the wavelength of light which can be displayed by any sub-pixel;
the sub-pixel also comprises a light condensing structure positioned on the light emitting side of the light emitting element facing the light emitting element; in each pixel, quantum dots are dispersed in the light condensing structures in at least two sub-pixels, and the quantum dots absorb the first color light emitted by the light emitting element and emit light corresponding to one color displayable by the sub-pixels.
2. The OLED display panel of claim 1, wherein the light concentrating structure is a convex lens.
3. The OLED display panel of claim 2, wherein the side of the convex lens facing away from the light emitting element is a curved surface, and the curvature of the convex lens facing away from the light emitting element is matched with the wavelength of light displayable by the corresponding sub-pixel and the refractive index of the convex lens, so that light exiting from the side of the convex lens facing away from the light emitting element is not incident on the convex lens adjacent to the convex lens.
4. The OLED display panel of claim 1, wherein a light blocking structure is disposed between two adjacent light concentrating structures.
5. The OLED display panel of claim 1, wherein the light-emitting elements emit light of a first color that is the same as the color of light that one of the sub-pixels can display.
6. The OLED display panel of claim 5, wherein the light-gathering structure is a transparent light-gathering structure or quantum dots are dispersed in the light-gathering structure in the sub-pixels displaying light of the same color as the light of the first color.
7. The OLED display panel of claim 1, wherein an isolation layer is disposed between the light concentrating structure and the light emitting elements.
8. The OLED display panel of claim 7, wherein a pixel defining structure is disposed between two adjacent light emitting elements, and the isolation layer covers the light emitting elements and the pixel defining structure.
9. The OLED display panel of claim 1, wherein a side of the light-concentrating structure facing away from the light-emitting elements is further provided with a protective layer, and a refractive index of the light-concentrating structure is greater than a refractive index of the protective layer.
10. An OLED display device, comprising the OLED display panel according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811449996.9A CN111261662A (en) | 2018-11-30 | 2018-11-30 | OLED display panel and OLED display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811449996.9A CN111261662A (en) | 2018-11-30 | 2018-11-30 | OLED display panel and OLED display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111261662A true CN111261662A (en) | 2020-06-09 |
Family
ID=70950108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811449996.9A Pending CN111261662A (en) | 2018-11-30 | 2018-11-30 | OLED display panel and OLED display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111261662A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113782572A (en) * | 2021-09-09 | 2021-12-10 | 深圳市华星光电半导体显示技术有限公司 | Color film substrate, preparation method thereof and display panel |
| CN114333614A (en) * | 2020-09-28 | 2022-04-12 | 京东方科技集团股份有限公司 | Display panel and display device |
| WO2022262817A1 (en) * | 2021-06-18 | 2022-12-22 | 华为技术有限公司 | Display apparatus and electronic device |
| WO2023070524A1 (en) * | 2021-10-29 | 2023-05-04 | 京东方科技集团股份有限公司 | Pixel arrangement structure and driving method therefor, and display substrate and preparation method therefor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102293053A (en) * | 2010-03-31 | 2011-12-21 | 松下电器产业株式会社 | Display panel device, and method for producing display panel device |
| CN106558576A (en) * | 2015-09-24 | 2017-04-05 | 中强光电股份有限公司 | White light source module and backlight module |
| CN107046047A (en) * | 2016-08-19 | 2017-08-15 | 广东聚华印刷显示技术有限公司 | Pixel cell of printed form electroluminescent device and its preparation method and application |
-
2018
- 2018-11-30 CN CN201811449996.9A patent/CN111261662A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102293053A (en) * | 2010-03-31 | 2011-12-21 | 松下电器产业株式会社 | Display panel device, and method for producing display panel device |
| CN106558576A (en) * | 2015-09-24 | 2017-04-05 | 中强光电股份有限公司 | White light source module and backlight module |
| CN107046047A (en) * | 2016-08-19 | 2017-08-15 | 广东聚华印刷显示技术有限公司 | Pixel cell of printed form electroluminescent device and its preparation method and application |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114333614A (en) * | 2020-09-28 | 2022-04-12 | 京东方科技集团股份有限公司 | Display panel and display device |
| WO2022262817A1 (en) * | 2021-06-18 | 2022-12-22 | 华为技术有限公司 | Display apparatus and electronic device |
| CN113782572A (en) * | 2021-09-09 | 2021-12-10 | 深圳市华星光电半导体显示技术有限公司 | Color film substrate, preparation method thereof and display panel |
| WO2023035297A1 (en) * | 2021-09-09 | 2023-03-16 | 深圳市华星光电半导体显示技术有限公司 | Color filter and manufacturing method therefor, and display panel |
| CN113782572B (en) * | 2021-09-09 | 2023-10-17 | 深圳市华星光电半导体显示技术有限公司 | Color film substrate, preparation method thereof and display panel |
| WO2023070524A1 (en) * | 2021-10-29 | 2023-05-04 | 京东方科技集团股份有限公司 | Pixel arrangement structure and driving method therefor, and display substrate and preparation method therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102508342B1 (en) | Organic light emitting display device | |
| US20210356788A1 (en) | Liquid crystal display device for under-screen identification scheme | |
| CN111261662A (en) | OLED display panel and OLED display device | |
| US10748975B2 (en) | Display device | |
| US20170170241A1 (en) | Display panel | |
| US20210050388A1 (en) | Display device | |
| CN111653683A (en) | Display panel and display device | |
| CN111682122B (en) | Display panel, preparation method thereof and display device | |
| US20170346043A1 (en) | Organic light emitting diode display | |
| CN110928021B (en) | Brightness enhancement film of quantum dot display panel and lens array | |
| WO2020192096A1 (en) | Array substrate, manufacturing method thereof, display panel, and display apparatus | |
| CN111564571A (en) | OLED display panel and display device | |
| CN111640879A (en) | OLED display panel and display device | |
| KR20170036160A (en) | Organic Light Emitting Diode Display Device | |
| CN108922914A (en) | A kind of OLED display panel and display device | |
| CN109888127B (en) | Display panel, manufacturing method thereof and display device | |
| US7915804B2 (en) | Organic electro-luminescent display and method for forming the same | |
| CN112310143A (en) | Quantum dot micro LED display device and preparation method thereof | |
| CN114497421A (en) | Display panel, preparation method and display device | |
| CN113113455A (en) | OLED display panel and display device | |
| CN111312916B (en) | Display panel and display device | |
| JP2009151945A (en) | Organic el light-emitting device and its manufacturing method | |
| KR20200024732A (en) | Display device | |
| CN215008276U (en) | Display panel and display device thereof | |
| US20140077195A1 (en) | Organic light-emitting diode package structure and method of manufacturing concavity on substrate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200609 |
|
| RJ01 | Rejection of invention patent application after publication |