CN111261666A - Display panel and display device - Google Patents
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- 229910052980 cadmium sulfide Inorganic materials 0.000 description 1
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
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- 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
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- H—ELECTRICITY
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- 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
- H10K59/351—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
Abstract
The invention provides a display panel and a display device, wherein the display panel comprises a plurality of light-emitting units arranged on an array substrate, each light-emitting unit comprises a first electrode layer, an organic light-emitting layer and a second electrode layer which are sequentially stacked on the array substrate, and the organic light-emitting layer comprises: the display panel comprises four sub-pixels, wherein at least two blue sub-pixels are arranged in the four sub-pixels, a yellow quantum dot layer is arranged on the light emitting side of the organic light emitting layer and used for converting blue light emitted by one of the blue sub-pixels into yellow light, or at least two red sub-pixels are arranged in the four sub-pixels and used for converting red light emitted by one of the red sub-pixels into yellow light.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
Display screens have been widely used in many fields such as portable electronic devices (e.g., mobile communication terminals, tablet computers, electronic books, and navigation devices) and large-screen electronic devices, wherein organic light-Emitting diodes (OLEDs) are increasingly used in display screens due to their advantages of low power consumption, high color saturation, wide viewing angle, thin thickness, and flexibility.
At present, display screens employing OLEDs typically include: the display panel comprises an array substrate, a plurality of light emitting units arranged on the array substrate, and a thin film packaging layer covering the light emitting units and the array substrate, wherein each light emitting unit comprises a first electrode layer, an organic light emitting layer and a second electrode layer which are sequentially arranged on the array substrate in a stacked mode, and for the full-color OLED display screen, the organic light emitting layers are usually made of RGB (red, green and blue) three primary colors, namely the organic light emitting layers comprise R (red) sub-pixels, G (green) sub-pixels and B (blue) sub-pixels.
However, when the full-color OLED display panel adopts RGB three-color display, the display color gamut is small and the overall display brightness is low.
Disclosure of Invention
In view of the above-mentioned drawbacks in the prior art, the present invention provides a display panel and a display device to solve the problems of the existing display device that the color gamut is smaller and the overall brightness is lower.
In order to achieve the above object, the present invention provides a display panel including:
a plurality of light emitting units disposed on the array substrate, each of the light emitting units including a first electrode layer, an organic light emitting layer, and a second electrode layer sequentially stacked on the array substrate,
the organic light emitting layer includes: four sub-pixels, and the four sub-pixels have at least two blue sub-pixels, and the light-emitting side of the organic light-emitting layer is provided with a yellow quantum dot layer, the yellow quantum dot layer is used for converting the blue light emitted by one of the blue sub-pixels into yellow light, or,
the four sub-pixels are provided with at least two red sub-pixels, and the yellow quantum dot layer is used for converting the red light emitted by one of the red sub-pixels into yellow light.
In the display panel provided by the invention, the organic light emitting layer comprises four sub-pixels, at least two blue sub-pixels are arranged in the four sub-pixels, and the light emitting side of the organic light emitting layer is provided with the yellow quantum dot layer, so that one blue sub-pixel emits blue light, part of the blue light emitted by the blue sub-pixel excites the yellow light emitted by the yellow quantum dot layer, and the other sub-pixels can emit red light and green light, or the four sub-pixels comprise at least two red sub-pixels, part of the red light emitted by the red sub-pixel excites the yellow light emitted by the yellow quantum dot layer, and the other sub-pixels can emit blue light and green light, so that the light emitting unit generates four lights of red, green and blue (RGBY), compared with RGB three-color display in the prior art, the invention realizes the purpose of red, green, blue and yellow display, widens the color gamut of the overall display image, and yellow light generated by the yellow quantum dot enables the human eyes to feel higher brightness, compared with the prior art, in the embodiment, on the premise of not improving the light emitting power of the OLED, the brightness of image display is improved, so that the display effect is better, therefore, the display panel provided by the embodiment realizes the purpose of red, green, blue and yellow display, improves the display brightness, widens the color gamut, and solves the problems of small color gamut and low overall display brightness in the three-color display in the prior art.
In a specific embodiment of the present invention, the thickness of the yellow quantum layer is optionally between 0.1um and 1 mm.
In an embodiment of the present invention, optionally, four blue sub-pixels are provided in the four sub-pixels, and a red quantum dot layer and a green quantum dot layer are further provided on the light exit side of the organic light emitting layer, where the red quantum dot layer is configured to convert blue light emitted by one of the blue sub-pixels into red light, and the green quantum dot layer is configured to convert blue light emitted by another one of the blue sub-pixels into green light.
In an embodiment of the invention, optionally, three blue sub-pixels and one red sub-pixel are provided in the four sub-pixels, and a green quantum dot layer is further provided on the light emitting side of the organic light emitting layer, where the green quantum dot layer is used to convert blue light emitted by one of the blue sub-pixels into green light, or,
the four sub-pixels are provided with three blue sub-pixels and a green sub-pixel, the light-emitting side of the organic light-emitting layer is also provided with a red quantum dot layer, and the red quantum dot layer is used for converting blue light emitted by one of the blue sub-pixels into red light.
In an embodiment of the invention, optionally, two blue sub-pixels, a red sub-pixel and a green sub-pixel are provided in the four sub-pixels, and a projection region of the yellow quantum dot layer on the organic light emitting layer covers one of the blue sub-pixels.
In an embodiment of the present invention, optionally, four red sub-pixels are provided in the four sub-pixels, and a blue quantum dot layer and a green quantum dot layer are further provided on the light exit side of the organic light emitting layer, where the blue quantum dot layer is configured to convert red light emitted by one of the red sub-pixels into blue light, and the green quantum dot layer is configured to convert red light emitted by another one of the red sub-pixels into green light.
In an embodiment of the invention, optionally, three red sub-pixels and one blue sub-pixel are provided in the four sub-pixels, and a green quantum dot layer is further provided on the light exit side of the organic light emitting layer, where the green quantum dot layer is used to convert red light emitted by one of the red sub-pixels into green light, or,
the four sub-pixels are provided with three red sub-pixels and a green sub-pixel, the light-emitting side of the organic light-emitting layer is also provided with a blue quantum dot layer, and the blue quantum dot layer is used for converting red light emitted by one of the red sub-pixels into blue light.
In an embodiment of the present invention, optionally, two red sub-pixels, a blue sub-pixel and a green sub-pixel are provided in the four sub-pixels, and a projection area of the yellow quantum dot layer on the organic light emitting layer covers one of the red sub-pixels.
In an embodiment of the invention, optionally, a light emitting direction of the organic light emitting layer faces the second electrode layer, and each quantum dot layer is located between the blue sub-pixel and the second electrode layer, or each quantum dot layer is located on a surface of the second electrode layer facing away from the blue sub-pixel, or,
the light-emitting direction of the organic light-emitting layer faces the first electrode layer, each quantum dot layer is located between the blue sub-pixel and the first electrode layer, or each quantum dot layer is located between the first electrode layer and the array substrate, or each quantum dot layer is located on one surface of the array substrate, which deviates from the first electrode layer.
The invention also provides a display device, which at least comprises any one of the display panels.
The construction of the present invention and other objects and advantages thereof will be more apparent from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.
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 introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1A is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the invention;
fig. 1B is a schematic cross-sectional view of a display panel according to an embodiment of the invention;
fig. 1C is a schematic cross-sectional view of a display panel according to an embodiment of the invention;
fig. 2A is a schematic cross-sectional structure diagram of a display panel according to a second embodiment of the present invention;
fig. 2B is a schematic cross-sectional view of a display panel according to a second embodiment of the present invention;
fig. 3 is a schematic cross-sectional structure diagram of a display panel according to a third embodiment of the present invention;
fig. 4 is a schematic cross-sectional structure diagram of a display panel according to a fourth embodiment of the present invention;
fig. 5 is a schematic cross-sectional structure diagram of a display panel according to a fifth embodiment of the present invention.
Description of reference numerals:
10-an array substrate;
21-a first electrode layer;
22-a second electrode layer;
23. 24, 25-organic light emitting layer;
23a, 23b, 23c, 23 d-blue sub-pixel;
24a, 24b, 24c, 24d, 231-red sub-pixel;
25a, 25b, 25c, 25d, 232-green sub-pixel;
31-a red quantum dot layer;
32-a green quantum dot layer;
33-a yellow quantum dot layer;
34-blue quantum dot layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. 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. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As described in the background, the OLED display panel in the prior art has the problems of a smaller display color gamut and a lower overall display brightness, and the reasons for such problems are that: full-color OLED display screen adopts the RGB three-colour to show, so the colour gamut is less than just, and simultaneously, the characteristic of luminescent material itself makes the display brightness of organic luminescent layer not enough, need promote the display brightness through improving luminous power among the prior art, but luminous power's improvement causes the influence to luminescent material's life, and the whole display brightness of OLED display panel finally appears is on the low side.
For the above reasons, the present invention provides a display panel exemplified as follows:
example one
Fig. 1A is a schematic cross-sectional structure diagram of a display panel according to a first embodiment of the present invention, fig. 1B is a schematic cross-sectional structure diagram of a display panel according to a first embodiment of the present invention, and fig. 1C is a schematic cross-sectional structure diagram of a display panel according to a second embodiment of the present invention.
In this embodiment, referring to fig. 1A to 1C, a display panel specifically includes: a plurality of light-emitting units disposed on the array substrate 10, each light-emitting unit includes a first electrode layer 21, an organic light-emitting layer 23, and a second electrode layer 22 sequentially stacked on the array substrate 10, wherein in this embodiment, in order to widen a color gamut and improve display luminance, specifically, the organic light-emitting layer 23 includes: four sub-pixels, which can respectively control the light emitting brightness, that is, the four sub-pixels are controlled independently, each sub-pixel can generate light under the action of the first electrode layer 21 and the second electrode layer 22, wherein in the present embodiment, at least two blue sub-pixels are provided in the four sub-pixels, and the light emitting side of the organic light emitting layer 23 is provided with a yellow quantum dot layer 33, the yellow quantum dot layer 33 is used for converting the blue light emitted by one of the blue sub-pixels into yellow light, so that the blue light generated by one of the blue sub-pixels of the at least two blue sub-pixels is projected outwards, the blue light generated by the other blue sub-pixel excites the yellow quantum dot layer 33 to generate yellow light, and the remaining sub-pixels emit red light and green light, or the remaining sub-pixels are also blue sub-pixels and are converted into red light and green light by the quantum dot layer, and finally, the light emitting unit can emit four lights of red green blue and green (RGBY), compared with the RGB three-color display in the prior art, in the present embodiment, yellow light is added, so that the purpose of red, green, blue, and yellow four-color display is achieved, so that the color gamut of the overall display image is widened, richer image colors can be displayed, and a more vivid image display effect is provided, and because human eyes are most sensitive to yellow, the brightness experienced by human eyes due to the addition of yellow light is higher.
In this embodiment, when the thickness of the yellow quantum layer 33 is large, the overall thickness of the light emitting unit is increased, and when the thickness of the yellow quantum layer 33 is small, the chromaticity and saturation of the yellow light converted by the yellow quantum layer 33 often cannot meet the requirements, so in this embodiment, the thickness of the yellow quantum layer 33 is between 0.1um and 1mm, and preferably, the thickness of the yellow quantum layer 33 may be 0.5mm or 0.2mm, which can ensure that the yellow light converted by the yellow quantum layer 33 has high chromaticity and saturation, and meanwhile, the thickness of the light emitting unit is not easily too thick.
In this embodiment, referring to fig. 1A, four sub-pixels are provided in the four sub-pixels, that is, the organic light emitting layer includes four blue sub-pixels, namely a blue sub-pixel 23a, a blue sub-pixel 23b, a blue sub-pixel 23c, and a blue sub-pixel 23d, and meanwhile, in order to realize four-color display, a red quantum dot layer 31 and a green quantum dot layer 32 are further provided on the light emitting side of the organic light emitting layer 23, that is, in this embodiment, the quantum dot layers include: three quantum dot layers of a red quantum dot layer 31, a green quantum dot layer 32 and a yellow quantum dot layer 33, wherein the red quantum dot layer 31 is used for converting the blue light emitted from the blue sub-pixel 23b into red light, the green quantum dot layer 32 is used for converting the blue light emitted from the blue sub-pixel 23c into green light, the yellow quantum dot layer 33 is used for converting the blue light emitted from the blue sub-pixel 23d into yellow light, i.e. the red quantum dot layer 31, the green quantum dot layer 32 and the yellow quantum dot layer 33 respectively generate red light, green light and yellow light under the excitation of the blue light generated from the three blue sub-pixels, and finally, the blue light emitted from the blue sub-pixel 23a, the red light emitted from the red quantum dot layer 31, the green light emitted from the green quantum dot layer 32 and the yellow light emitted from the yellow quantum dot layer 33, so that the light emitting unit can generate four lights of red, green and blue and yellow (RGBY), in this embodiment, because, therefore, the manufacturing can be completed only by one-time thermal evaporation, and the quantum dot layer can be formed in a coating mode, so that the manufacturing difficulty of the organic light-emitting layer 23 is greatly reduced.
In this embodiment, referring to fig. 1A, the light emitting direction of the organic light emitting layer 23 faces the second electrode layer 22, at this time, the red quantum dot layer 31, the green quantum dot layer 32 and the yellow quantum dot layer 33 may be located between the blue sub-pixel and the second electrode layer 22, specifically, the red quantum dot layer 31 is disposed on the blue sub-pixel 23b, the green quantum dot layer 32 is disposed on the blue sub-pixel 23c, the yellow quantum dot layer 33 is disposed on the blue sub-pixel 23d, the blue sub-pixel 23a emits blue light outwards, the red quantum dot layer 31 converts the blue light generated by the blue sub-pixel 23b into red light, the green quantum dot layer 32 converts the blue light generated by the blue sub-pixel 23c into green light, the yellow quantum dot layer 33 converts the blue light generated by the blue sub-pixel 23d into yellow light, and finally four lights of red, green, blue and yellow are generated, so as to achieve the purpose.
Alternatively, in the present embodiment, referring to fig. 1B, when the light-emitting direction of the organic light-emitting layer 23 is toward the second electrode layer 22, the red quantum dot layer 31, the green quantum dot layer 32, and the yellow quantum dot layer 33 may also be disposed on a side of the second electrode layer 22 away from the blue sub-pixel, that is, on the top surface of the second electrode layer 22.
Alternatively, referring to fig. 1C, the light-emitting direction of the organic light-emitting layer 23 may be toward the first electrode layer 21, and at this time, the red, green, and yellow quantum dot layers 31, 32, and 33 may also be disposed on the first electrode layer 21, and at this time, the red, green, and yellow quantum dot layers 31, 32, and 33 may be located between the first electrode layer 21 and the blue sub-pixel, for example, the red quantum dot layer 31 may be located between the blue sub-pixel 23b and the first electrode layer 21, the green quantum dot layer 32 may be located between the blue sub-pixel 23C and the first electrode layer 21, and the yellow quantum dot layer 33 may be located between the blue sub-pixel 23d and the first electrode layer 21. Or the red, green and yellow quantum dot layers 31, 32 and 33 are located between the first electrode layer 21 and the array substrate 10, or may also be located on a side of the array substrate 10 away from the first electrode layer 21, i.e., on the bottom surface of the array substrate 10.
In the present embodiment, when the red, green and yellow quantum dot layers 31, 32 and 33 are disposed on the second and first electrode layers 22 and 21, which face away from the sub-pixels, or on the array substrate 10, the red, green and yellow quantum dot layers 31, 32 and 33 are away from the sub-pixels, so as to facilitate processing and alignment, and the red, green and yellow quantum dot layers 31, 32 and 33 are away from the sub-pixels, so that the red, green and yellow quantum dot layers 31, 32 and 33 are not easy to damage the sub-pixel layers if they are not properly operated during the manufacturing process, thereby ensuring normal light emission of the sub-pixels, and when the red, green and yellow quantum dot layers 31, 32 and 33 are made of inorganic materials, the red, green and yellow quantum dot layers 31, 33 are made of inorganic materials, The green quantum dot layer 32 and the yellow quantum dot layer 33 are inorganic layers and have the same property with the second electrode layer 22 or the first electrode layer 21, so that the adhesion between the red quantum dot layer 31, the green quantum dot layer 32 and the yellow quantum dot layer 33 and the second electrode layer 22 or the first electrode layer 21 is stronger, and when the display panel is bent, the adhesion between the red quantum dot layer 31, the green quantum dot layer 32 and the yellow quantum dot layer 33 and the second electrode layer 22 or the first electrode layer 21 is larger, so that the peeling between the light-emitting unit and the quantum dot layer is not easy to occur.
In this embodiment, when the red, green and yellow quantum dot layers 31, 32 and 33 are disposed, the projection areas of the red, green and yellow quantum dot layers 31, 32 and 33 on the corresponding blue sub-pixels are equal to the area of the corresponding blue sub-pixels, so that the projections of the red, green and yellow quantum dot layers 31, 32 and 33 on the organic light emitting layer 23 can completely cover the corresponding blue sub-pixels.
In this embodiment, the emission spectrum of the quantum dot material can be controlled by changing the size of the quantum dot material, that is, the quantum dots with different sizes generate spectra with different colors under the same illumination, so in this embodiment, the same quantum dot material with different sizes can be specifically selected for the red quantum dot layer 31, the green quantum dot layer 32 and the yellow quantum dot layer 33, wherein in this embodiment, the red quantum dot layer 31, the green quantum dot layer 32 and the yellow quantum dot layer 33 can be specifically made of quantum dot materials such as cadmium sulfide, cadmium selenide or cadmium telluride, and by using these materials, a better light-emitting conversion effect can be realized, the brightness of image display is improved, and the display effect is better.
In this embodiment, when the organic light emitting layer 23 includes four blue sub-pixels, the four blue sub-pixels may be independent four sub-pixels, so that when the light emitting unit is controlled, the light emitting luminance may be respectively controlled for the four sub-pixels, and when the luminance of any one of the four lights does not meet the requirement, the light emitting power of the blue sub-pixel corresponding to the light may be independently adjusted.
Example two
Fig. 2A is a schematic cross-sectional structure diagram of a display panel according to a second embodiment of the present disclosure, and fig. 2B is a schematic cross-sectional structure diagram of another display panel according to the second embodiment of the present disclosure.
In this embodiment, referring to fig. 2A, the organic light emitting layer 23 includes four sub-pixels, and the four sub-pixels include three blue sub-pixels and one red sub-pixel 231, the three blue sub-pixels are a blue sub-pixel 23a, a blue sub-pixel 23c, and a blue sub-pixel 23d, and meanwhile, in order to implement four-color display, a green quantum dot layer 32 is further disposed on the light emitting side of the organic light emitting layer 23, that is, in this embodiment, the quantum dot layer includes: a green quantum dot layer 32 and a yellow quantum dot layer 33, wherein the green quantum dot layer 32 is used to convert the blue light emitted from the blue sub-pixel 23c into green light, the yellow quantum dot layer 33 is used to convert the blue light emitted from the blue sub-pixel 23d into yellow light, that is, the green quantum dot layer 32 and the yellow quantum dot layer 33 respectively generate green light and yellow light under the excitation of the blue light generated by the two blue sub-pixels, and finally, the blue light emitted from the blue sub-pixel 23a, the red light emitted from the red sub-pixel 231, the green light emitted from the green quantum dot layer 32 and the yellow light emitted from the yellow quantum dot layer 33 make the light-emitting unit generate red, green and blue (RGBY) four lights, in this embodiment, only two sub-pixels, namely the blue sub-pixel and the red sub-pixel 231, are included in the organic light-emitting layer 23, so that the fabrication can be completed by only two times of thermal evaporation, and the remaining quantum dots, this reduces the number of thermal evaporation of the organic light-emitting layer 23.
Referring to fig. 2A, a green quantum dot layer 32 is disposed on the blue sub-pixel 23c, a yellow quantum dot layer 33 is disposed on the blue sub-pixel 23d, the blue sub-pixel 23a emits blue light, the red sub-pixel 231 emits red light, the green quantum dot layer 32 converts the blue light generated by the blue sub-pixel 23c into green light, the yellow quantum dot layer 33 converts the blue light generated by the blue sub-pixel 23d into yellow light, and finally four lights of red, green, blue and yellow are generated, so as to achieve the purpose of four-color display.
In this embodiment, when the light emitting direction of the organic light emitting layer 23 faces the second electrode layer 22, the green quantum dot layer 32 and the yellow quantum dot layer 33 may be further disposed on a surface of the second electrode layer 22 facing away from the blue sub-pixel.
Alternatively, the light-emitting direction of the organic light-emitting layer 23 may be toward the first electrode layer 21, in this case, the green quantum dot layer 32 may be located between the blue sub-pixel 23c and the first electrode layer 21, and the yellow quantum dot layer 33 may be located between the blue sub-pixel 23d and the first electrode layer 21, or the green quantum dot layer 32 and the yellow quantum dot layer 33 may be located between the first electrode layer 21 and the array substrate 10, for example, the green quantum dot layer 32 and the yellow quantum dot layer 33 may also be located on a side of the first electrode layer 21 facing away from the sub-pixels, or in this embodiment, the green quantum dot layer 32 and the yellow quantum dot layer 33 may also be located on a side of the array substrate 10 facing away from the first electrode layer 21.
In this embodiment, referring to fig. 2B, the organic light emitting layer 23 includes four sub-pixels, and the four sub-pixels include three blue sub-pixels and one green sub-pixel 232, the three blue sub-pixels are respectively a blue sub-pixel 23a, a blue sub-pixel 23B, and a blue sub-pixel 23d, and meanwhile, in order to realize four-color display, a red quantum dot layer 31 is further disposed on the light emitting side of the organic light emitting layer 23. That is, in the present embodiment, the quantum dot layer includes: the red quantum dot layer 31 is used for converting blue light emitted by the blue sub-pixel 23b into red light, the yellow quantum dot layer 33 is used for converting blue light emitted by the blue sub-pixel 23d into yellow light, namely the red quantum dot layer 31 and the yellow quantum dot layer 33 respectively generate red light and yellow light under the excitation of the blue light generated by the two blue sub-pixels, and finally, the blue light emitted by the blue sub-pixel 23a, the red light emitted by the red quantum dot layer 31, the green light emitted by the green sub-pixel 232 and the yellow light emitted by the yellow quantum dot layer 33 enable the light-emitting unit to generate four kinds of light, namely red, green, blue and yellow (RGBY).
In this embodiment, referring to fig. 2B, the red quantum dot layer 31 is disposed on the blue sub-pixel 23B, the yellow quantum dot layer 33 is disposed on the blue sub-pixel 23d, the blue sub-pixel 23a emits blue light outwards, the red quantum dot layer 31 converts the blue light generated by the blue sub-pixel 23B into red light, the green sub-pixel 232 emits green light, the yellow quantum dot layer 33 converts the blue light generated by the blue sub-pixel 23d into yellow light, and finally four lights of red, green, blue and yellow are generated, so as to achieve the purpose of four-color display.
In this embodiment, when the light-emitting direction of the organic light-emitting layer 23 is toward the second electrode layer 22, the red quantum dot layer 31 and the yellow quantum dot layer 33 can also be disposed on the side of the second electrode layer 22 away from the blue sub-pixel,
alternatively, the light emitting direction of the organic light emitting layer 23 may be toward the first electrode layer 21, and in this case, the red quantum dot layer 31 and the yellow quantum dot layer 33 may also be disposed on the first electrode layer 21, for example, the red quantum dot layer 31 may be located between the blue sub-pixel 23b and the first electrode layer 21, and the yellow quantum dot layer 33 may be located between the blue sub-pixel 23d and the first electrode layer 21, or on a side of the first electrode layer 21 facing away from the sub-pixels, or the red quantum dot layer 31 and the yellow quantum dot layer 33 may be located between the first electrode layer 21 and the array substrate 10, or on a side of the array substrate 10 facing away from the first electrode layer 21.
EXAMPLE III
Fig. 3 is a schematic cross-sectional structure diagram of a display panel according to a third embodiment of the present invention.
In this embodiment, the organic light emitting layer 23 includes four sub-pixels, and the four sub-pixels include two blue sub-pixels, one green sub-pixel 232 and one red sub-pixel 231, the two blue sub-pixels are the blue sub-pixel 23a and the blue sub-pixel 23d, at this time, only the yellow quantum dot layer 33 is disposed on the light emitting side of the organic light emitting layer 23, wherein the yellow quantum dot layer 33 is used for converting the blue light emitted by the blue sub-pixel 23d into yellow light, the green sub-pixel 232 emits green light, and the red sub-pixel 231 emits red light, so that the light emitting unit can generate four lights of red, green, blue and yellow (RGBY).
In the embodiment, referring to fig. 3, the blue sub-pixel 23a emits blue light, the red sub-pixel 231 emits red light, the green sub-pixel 232 emits green light, and the yellow quantum dot layer 33 converts the blue light generated by the blue sub-pixel 23d into yellow light, so as to generate four lights of red, green, blue and yellow, thereby achieving the purpose of four-color display.
In this embodiment, referring to fig. 3, when the light emitting direction of the organic light emitting layer 23 faces the second electrode layer, the yellow quantum dot layer 33 may be disposed on the blue sub-pixel 23d, or the yellow quantum dot layer 33 may be disposed on a side of the second electrode layer 22 facing away from the blue sub-pixel.
Alternatively, the light emitting direction of the organic light emitting layer 23 may be toward the first electrode layer 21, and in this case, the yellow quantum dot layer 33 may be located between the blue sub-pixel 23d and the first electrode layer 21, or the yellow quantum dot layer 33 may be located between the first electrode layer 21 and the array substrate 10, or on a surface of the array substrate 10 away from the first electrode layer 21.
Example four
Fig. 4 is a schematic cross-sectional structure diagram of a display panel according to a fourth embodiment of the present invention.
In the display panel provided in this embodiment, referring to fig. 4, the organic light emitting layer generates green-blue yellow light by exciting the quantum dot layer with the red OLED, and specifically, the organic light emitting layer 24 includes: four sub-pixels, which can respectively control the light emitting brightness, and each sub-pixel can generate light, wherein in the present embodiment, at least two red sub-pixels are provided in the four sub-pixels, and the light emitting side of the organic light emitting layer 24 is provided with a yellow quantum dot layer 33, the yellow quantum dot layer 33 is used to convert the red light emitted by one of the red sub-pixels into yellow light, so that the red light generated by one of the red sub-pixels of the at least two red sub-pixels is projected outwards, the red light generated by the other red sub-pixel excites the yellow quantum dot layer 33 to generate yellow light, and the remaining sub-pixels emit blue light and green light, or the remaining sub-pixels are also red sub-pixels and are converted into blue light and green light by the quantum dot layer, and finally, the light emitting unit can emit four lights of Red Green Blue Yellow (RGBY), compared with the RGB three-color display in the prior art, in the present embodiment, the yellow light is added, so that the purpose of red, green, blue and yellow four-color display is achieved, the color gamut of the overall display image is widened, richer image colors can be displayed, and a more vivid image display effect is provided.
Specifically, in this embodiment, four red sub-pixels are provided in the four sub-pixels, that is, the organic light emitting layer includes four red sub-pixels, namely, a red sub-pixel 24a, a red sub-pixel 24b, a red sub-pixel 24c, and a red sub-pixel 24d, and meanwhile, in order to realize four-color display, a blue quantum dot layer 34 and a green quantum dot layer 32 are further provided on the light emitting side of the organic light emitting layer 24, that is, in this embodiment, the quantum dot layers include: the light emitting unit includes three quantum dot layers, namely a blue quantum dot layer 34, a green quantum dot layer 32 and a yellow quantum dot layer 33, wherein the blue quantum dot layer 34 is used for converting red light emitted by the red sub-pixel 24b into blue light, the green quantum dot layer 32 is used for converting red light emitted by the red sub-pixel 24c into green light, and the yellow quantum dot layer 33 is used for converting red light emitted by the red sub-pixel 24d into yellow light, namely the blue quantum dot layer 34, the green quantum dot layer 32 and the yellow quantum dot layer 33 respectively generate blue light, green light and yellow light under the excitation of the red light generated by the three red sub-pixels, and finally, the red light emitted by the red sub-pixel 24a, the blue light emitted by the blue quantum dot layer 34, the green light emitted by the green quantum dot layer 32 and the yellow light emitted by the yellow quantum dot layer 33, so that the light emitting unit can generate four lights of red, green.
In this embodiment, the four sub-pixels may further include three red sub-pixels and one blue sub-pixel, or three red sub-pixels and one green sub-pixel, or the four sub-pixels may further include two red sub-pixels, one blue sub-pixel, and one green sub-pixel.
In this embodiment, the blue, green and yellow quantum dot layers 34, 32 and 33 may be respectively disposed on the red, red and yellow sub-pixels 24b, 24c and 24d, or when the light-emitting direction of the organic light-emitting layer 23 is toward the second electrode layer 22, the blue, green and yellow quantum dot layers 34, 32 and 33 may be further disposed on a side of the second electrode layer 22 away from the red sub-pixel, or when the light-emitting direction of the organic light-emitting layer 23 is toward the first electrode layer 21, the blue, green and yellow quantum dot layers 34, 32 and 33 may be further disposed between the red sub-pixel and the first electrode layer 21, between the first electrode layer 21 and the array substrate 10, or on a side of the array substrate 10 away from the first electrode layer 21, in this embodiment, when the blue, green and yellow quantum dot layers 34, 32 and 33 are respectively disposed on the red, red and red sub-pixels 24c and 24d, or when the light-emitting direction of the, When the green quantum dot layer 32 and the yellow quantum dot layer 33 are disposed on the second electrode layer 22 and the first electrode layer 21 on the side away from the red sub-pixel or on the array substrate 10, the blue quantum dot layer 34, the green quantum dot layer 32 and the yellow quantum dot layer 33 are away from the red sub-pixel, so that the processing and the alignment bonding are more convenient, and the blue quantum dot layer 34, the green quantum dot layer 32 and the yellow quantum dot layer 33 are away from the red sub-pixel, so that the blue quantum dot layer 34, the green quantum dot layer 32 and the yellow quantum dot layer 33 are not easy to damage the sub-pixel layers if the operation is improper during the manufacturing process, thereby ensuring the normal light emission of the sub-pixel, and meanwhile, when the blue quantum dot layer 34, the green quantum dot layer 32 and the yellow quantum dot layer 33 are made of inorganic materials, the blue quantum dot layer 34, the green quantum dot layer 32 and the yellow dot layer 33 are made of inorganic materials with the second electrode layer 22 or the first electrode layer 21, the blue, green, and yellow quantum dot layers 34, 32, and 33 have the same properties and therefore have stronger adhesion to the second electrode layer 22 or the first electrode layer 21, and when the display panel is bent, the blue, green, and yellow quantum dot layers 34, 32, and 33 have greater adhesion to the second electrode layer 22 or the first electrode layer 21, and thus are not easily peeled off, so that the light-emitting units and the quantum dot layers are not easily peeled off.
EXAMPLE five
Fig. 5 is a schematic cross-sectional structure diagram of a display panel according to a fifth embodiment of the present invention.
In the display panel provided in this embodiment, referring to fig. 5, the organic light emitting layer 25 specifically generates red, blue and yellow light by exciting the quantum dot layer with the green OLED, and specifically, the organic light emitting layer 25 includes: four sub-pixels, which can respectively control the light emitting brightness, each sub-pixel can generate light under the action of the first electrode layer 21 and the second electrode layer 22, wherein in the present embodiment, at least two green sub-pixels are provided in the four sub-pixels, and the light emitting side of the organic light emitting layer is provided with a yellow quantum dot layer 33, the yellow quantum dot layer 33 is used to convert the green light emitted by one of the green sub-pixels into yellow light, so that the green light generated by one of the green sub-pixels of the at least two green sub-pixels is projected outwards, the green light generated by the other green sub-pixel excites the yellow quantum dot layer 33 to generate yellow light, and the remaining sub-pixels emit blue light and red light, or the remaining sub-pixels are also green sub-pixels and are converted into blue light and red light by the quantum dot layer, and finally, the light emitting unit can emit four lights of red green, blue and green, and blue (RGBY), compared with the RGB three-color display in the, in this embodiment, because yellow light is added, the purpose of red, green, blue, yellow and four-color display is achieved, the color gamut of the overall display image is widened, richer image colors can be displayed, and a more vivid image display effect is provided, and because human eyes are most sensitive to yellow, the brightness felt by human eyes is higher due to the addition of yellow light.
Specifically, in this embodiment, four green sub-pixels are provided in the four sub-pixels, that is, the organic light emitting layer includes four green sub-pixels, that is, a green sub-pixel 25a, a green sub-pixel 25b, a green sub-pixel 25c, and a green sub-pixel 25d, respectively, and meanwhile, in order to implement four-color display, a blue quantum dot layer 34 and a red quantum dot layer 31 are further provided on the light emitting side of the organic light emitting layer 25, that is, in this embodiment, the quantum dot layers include: a blue quantum dot layer 34, a red quantum dot layer 31 and a yellow quantum dot layer 33, wherein the blue quantum dot layer 34 is used for converting the green light emitted from the green sub-pixel 25b into the blue light, the red quantum dot layer 31 is used for converting the green light emitted from the green sub-pixel 25c into the red light, and the yellow quantum dot layer 33 is used for converting the green light emitted from the green sub-pixel 25d into the yellow light, i.e., the blue quantum dot layer 34, the red quantum dot layer 31 and the yellow quantum dot layer 33 respectively generate the blue light, the red light and the yellow light under the excitation of the green light generated from the three green sub-pixels, and finally, the red light emitted from the green sub-pixel 25a, the blue light emitted from the blue quantum dot layer 34, the red light emitted from the red quantum dot layer 31 and the yellow light emitted from the yellow quantum dot layer 33, so that the light-emitting unit can generate four lights of red, green.
In this embodiment, the four sub-pixels may further include three green sub-pixels and one blue sub-pixel, or include three green sub-pixels and one red sub-pixel, and specific setting manners may refer to those shown in the above embodiments, which are not described again in this embodiment.
EXAMPLE six
The present embodiment provides a display device, wherein the display device is at least the display panel of any one of the above embodiments, and the display device is specifically any product or component having a display function, such as a television, a digital camera, a mobile phone, a tablet computer, a smart watch, an electronic book, a navigator, and the like.
In this embodiment, the display device includes the display panel described above, and the display panel achieves the purpose of displaying red, green, blue, and yellow, thereby widening the color gamut of the overall display image, and yellow light generated by the yellow quantum dots makes the brightness felt by human eyes higher.
In the description of the present invention, it should be noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may for example be fixed or indirectly connected through intervening media, or may be interconnected between two elements or may be in the interactive relationship between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically stated otherwise.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
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. The utility model provides a display panel, is including setting up a plurality of luminescence units on array substrate, every luminescence unit is including stacking gradually the setting and is in first electrode layer, organic luminescent layer and the second electrode layer on the array substrate, its characterized in that:
the organic light emitting layer includes: four sub-pixels, and the four sub-pixels have at least two blue sub-pixels, and the light-emitting side of the organic light-emitting layer is provided with a yellow quantum dot layer, the yellow quantum dot layer is used for converting the blue light emitted by one of the blue sub-pixels into yellow light, or,
the four sub-pixels are provided with at least two red sub-pixels, and the yellow quantum dot layer is used for converting the red light emitted by one of the red sub-pixels into yellow light.
2. The display panel of claim 1 wherein the thickness of the yellow quantum layer is between 0.1um-1 mm.
3. The display panel of claim 1, wherein the four sub-pixels have four blue sub-pixels, and the light-emitting side of the organic light-emitting layer is further provided with a red quantum dot layer for converting blue light emitted from one of the blue sub-pixels into red light and a green quantum dot layer for converting blue light emitted from another of the blue sub-pixels into green light.
4. The display panel of claim 1, wherein the four sub-pixels have three blue sub-pixels and one red sub-pixel, and the light-emitting side of the organic light-emitting layer is further provided with a green quantum dot layer for converting blue light emitted from one of the blue sub-pixels into green light, or,
the four sub-pixels are provided with three blue sub-pixels and a green sub-pixel, the light-emitting side of the organic light-emitting layer is also provided with a red quantum dot layer, and the red quantum dot layer is used for converting blue light emitted by one of the blue sub-pixels into red light.
5. The display panel of claim 1 wherein there are two blue subpixels, a red subpixel and a green subpixel in the four subpixels, and the projection area of the yellow quantum dot layer on the organic light emitting layer covers one of the blue subpixels.
6. The display panel of claim 1, wherein four of the four sub-pixels are red sub-pixels, and the light-emitting side of the organic light-emitting layer is further provided with a blue quantum dot layer for converting red light emitted from one of the red sub-pixels into blue light and a green quantum dot layer for converting red light emitted from another of the red sub-pixels into green light.
7. The display panel of claim 1, wherein the four sub-pixels have three red sub-pixels and one blue sub-pixel, and the light-emitting side of the organic light-emitting layer is further provided with a green quantum dot layer for converting red light emitted from one of the red sub-pixels into green light, or,
the four sub-pixels are provided with three red sub-pixels and a green sub-pixel, the light-emitting side of the organic light-emitting layer is also provided with a blue quantum dot layer, and the blue quantum dot layer is used for converting red light emitted by one of the red sub-pixels into blue light.
8. The display panel of claim 1, wherein the four sub-pixels have two red sub-pixels, a blue sub-pixel and a green sub-pixel, and the projection area of the yellow quantum dot layer on the organic light emitting layer covers one of the red sub-pixels.
9. The display panel according to any one of claims 1 to 8, wherein the light emission direction of the organic light emitting layer is toward the second electrode layer, and each of the quantum dot layers is located between the sub-pixel layer and the second electrode layer, or each of the quantum dot layers is located on a side of the second electrode layer facing away from the sub-pixel layer, or,
the light-emitting direction of the organic light-emitting layer faces the first electrode layer, each quantum dot layer is located between the sub-pixel layer and the first electrode layer, or each quantum dot layer is located between the first electrode layer and the array substrate, or each quantum dot layer is located on one surface of the array substrate, which deviates from the first electrode layer.
10. A display device comprising at least the display panel according to any one of claims 1 to 9.
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