CN111864103B - Display panel and preparation method thereof - Google Patents

Display panel and preparation method thereof Download PDF

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Publication number
CN111864103B
CN111864103B CN202010644578.6A CN202010644578A CN111864103B CN 111864103 B CN111864103 B CN 111864103B CN 202010644578 A CN202010644578 A CN 202010644578A CN 111864103 B CN111864103 B CN 111864103B
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layer
light
emitting layer
display panel
sub
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CN111864103A (en
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彭斯敏
金江江
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/85—Arrangements for extracting light from the devices
    • H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • 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
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • 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
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/1201—Manufacture or treatment
    • 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
    • H10K59/40—OLEDs integrated with touch screens
    • 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
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
    • H10K59/65—OLEDs integrated with inorganic image sensors
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The invention discloses a display panel and a preparation method thereof, wherein the display panel comprises a main display area and an additional functional area, and specifically comprises a substrate; a light emitting layer disposed on the substrate, the light emitting layer including a plurality of sub-pixels; the touch layer is arranged on the luminous layer; the light modulation and control layer is arranged on one side of the touch control layer, which is far away from the substrate; the light regulation and control layer is correspondingly arranged in the additional functional area, and the number of the sub-pixels positioned in the additional functional area is less than that of the sub-pixels positioned in the main display area. According to the invention, the light control layer is arranged in the display panel and is correspondingly arranged in the additional function area, and the light emitted from the light emitting layer of the additional function area passes through the light control layer to generate a dispersion effect, so that the light emitting coverage area is enlarged, the RGB light emitting effect can be improved to the maximum extent, the contrast difference between the additional function area and the main display area is reduced, and the product quality and the user experience are improved.

Description

Display panel and preparation method thereof
Technical Field
The invention relates to the technical field of display, in particular to a display panel applied to a camera arranged under a screen and a preparation method thereof.
Background
Compare with traditional display screen, comprehensive screen has the super high screen and accounts for than, can hold bigger screen, when having promoted the face value of display screen, has improved user's visual experience greatly. The full-face screen on the market at present has: u-type screen, V-type screen, O-type screen and Camera are placed under the screen (CUP) and other forms, the CUP can be said to be a real full screen, and the front of the machine body is completely used for displaying.
For a camera of a full-face screen of a mobile phone placed under a screen (CUP), the biggest bottleneck is that the transmittance of light passing through the screen is too low, a plurality of film layers are arranged above the camera, and part of light is lost when the light passes through each layer. How to solve the above problems is a dilemma that is faced before the comprehensive screen. The current mainstream technology is to reduce the number of pixels above the camera, so as to reduce the area occupied by the metal layer silver layer in the anode, reduce the light blocking effect of the anode, and improve the light transmittance. The pixel quantity is reduced, the density of red, green and blue sub-pixels is reduced, the light output quantity of a CUP area is reduced, contrast difference is formed between the CUP area and a normal display area, and the experience of a user is greatly reduced.
In summary, the display panel in the prior art has the technical problems that the number of sub-pixels in the additional function area is reduced, the RGB density is too low, the light output amount of the CUP area is reduced, the contrast difference with the main display area is formed, and the user experience is reduced.
Disclosure of Invention
The embodiment of the invention provides a display panel and a preparation method thereof, which are used for solving the technical problems that in the prior art, the display panel has the defects that the quantity of sub-pixels in an additional function area is reduced, the RGB density is too low, the light output quantity of a CUP area is reduced, the contrast difference is formed between the CUP area and a main display area, and the user experience is reduced.
To solve the above problem, in a first aspect, the present invention provides a display panel including a main display area and an additional function area, wherein the display panel includes:
a substrate;
a light emitting layer disposed on the substrate, the light emitting layer including a plurality of sub-pixels;
the touch layer is arranged on the light emitting layer; and
the light regulation and control layer is arranged on one side of the touch layer, which is far away from the substrate;
the light regulation and control layer is correspondingly arranged in the additional functional area, and the number of the sub-pixels positioned in the additional functional area is less than that of the sub-pixels positioned in the main display area.
In some embodiments of the present invention, the light modulation layer includes at least one light modulation layer and a planarization layer, the refractive index between the light modulation layer and the planarization layer is different, and the contact surface of the light modulation layer includes a plurality of convex portions.
In some embodiments of the present invention, a shape or a size of each of the protrusions corresponds to a shape or a size of each of the sub-pixels in the light emitting layer, and a projection of each of the protrusions in the light emitting layer covers each of the sub-pixels.
In some embodiments of the present invention, when the refractive index of the light modulation layer on the side close to the light emitting layer is smaller than the refractive index of the planarization layer on the side far from the light emitting layer, the convex portion protrudes toward the side far from the light emitting layer.
In some embodiments of the present invention, when the refractive index of the light modulation layer on the side close to the light emitting layer is larger than the refractive index of the planarization layer on the side far from the light emitting layer, the convex portion protrudes toward the side close to the light emitting layer.
In some embodiments of the present invention, a pitch between adjacent sub-pixels located in the additional function region is greater than a pitch between adjacent sub-pixels located in the main display region.
In a second aspect, the present invention provides a method for manufacturing a display panel, the method being used for manufacturing the display panel according to any one of the first aspect, including the steps of:
providing a substrate, and preparing a light-emitting layer on the substrate, wherein the light-emitting layer comprises a plurality of sub-pixels;
preparing a touch layer on the light emitting layer;
preparing a light regulation and control layer on one side of the touch layer far away from the substrate to obtain the display panel;
the display panel comprises a main display area and an additional function area, the light regulation and control layer is correspondingly arranged in the additional function area, and the number of the sub-pixels positioned in the additional function area is less than that of the sub-pixels positioned in the main display area.
In some embodiments of the present invention, preparing the light modulating layer comprises: preparing at least one dimming layer on the touch layer; preparing a plurality of convex parts on the surface of the at least one dimming layer; and preparing a planarization layer having a different refractive index on the convex portion.
In some embodiments of the present invention, the at least one dimming layer and the planarization layer are prepared by an inkjet printing or spin coating method, and the plurality of protrusions are prepared by an inkjet printing, nanoimprinting, or exposure development method.
In some embodiments of the present invention, the material used to prepare the light control layer comprises acrylic acid, hexamethyldisiloxane, polyacrylates, polycarbonates, or polystyrene.
Compared with the existing display panel, the display panel is provided with the light control layer which is correspondingly arranged in the additional function area, and the light emitted from the light emitting layer of the additional function area passes through the light control layer to generate the dispersion effect, so that the light emitting coverage area is enlarged, the RGB light emitting effect can be improved to the maximum extent, the contrast difference between the additional function area and the main display area is reduced, and the product quality and the user experience are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a light modulating layer according to one embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a display panel according to an embodiment of the present invention; and
FIG. 4 is a flow chart of a method of making in one embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of 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.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the prior art, the display panel has the technical problems that the quantity of sub-pixels in an additional function area is reduced, the RGB density is too low, the light output quantity of a CUP area is reduced, the contrast difference is formed between the CUP area and a main display area, and the user experience is reduced.
Accordingly, the embodiment of the invention provides a display panel and a preparation method thereof. The following are detailed descriptions.
First, an embodiment of the invention provides a display panel, as shown in fig. 1, where fig. 1 is a schematic structural diagram of the display panel according to an embodiment of the invention. The display panel includes: a substrate 100; a light emitting layer 200 disposed on the substrate 100, the light emitting layer 200 including a plurality of sub-pixels 201; a touch layer 300 disposed on the light emitting layer 200; the light modulation and control layer 400 is arranged on one side of the touch layer 300 away from the substrate 100;
the light modulation layer 400 is correspondingly disposed in the additional functional region, and the number of the sub-pixels 201 in the additional functional region is less than the number of the sub-pixels 201 in the main display region.
Compared with the existing display panel, the light control layer 400 is arranged in the display panel, the light control layer 400 is correspondingly arranged in the additional function area, light emitted from the light emitting layer 200 of the additional function area passes through the light control layer 400 to generate a dispersion effect, the light emitting coverage area is enlarged, the RGB light emitting effect can be improved to the maximum extent, the contrast difference between the additional function area and the main display area is reduced, and the product quality and the user experience are improved.
Fig. 2 is a schematic diagram of a light modulating layer according to an embodiment of the invention. In the embodiment of the present invention, the light modulation layer 400 includes at least one light modulation layer 401 and a planarization layer 402, the refractive index between the light modulation layer 401 and the planarization layer 402 is different, and the contact surface includes a plurality of convex portions, and light emitted from the light emitting layer 200 passes through the contact surface to generate a dispersion effect, so that the light emitting coverage area is enlarged, and the contrast difference between the additional functional region and the main display region is reduced.
It is to be understood that the above-listed film layers are not all of the display panel, and the film layers are only shown in relative positions in the drawings and are not necessarily in direct contact with each other.
The display panel comprises a main display area and an additional function area, wherein the structure of the main display area is arranged close to the right side in the figure, the structure of the additional function area is arranged close to the left side in the figure, and a wavy line is used as a boundary. In general, the area of the main display region is much larger than that of the additional function region, and in the embodiment of the present invention, the additional function region includes the camera layer 500, and in this case, the additional function region is an off-screen camera region. The light emitting layer 200 includes a plurality of sub-pixels 201, and in the embodiment of the present invention, the plurality of sub-pixels 201 include red, green, and blue sub-pixels.
Since the under-screen camera area requires higher light transmittance than the main display area, the distance between the adjacent sub-pixels 201 located in the additional function area is d2, the distance between the adjacent sub-pixels 201 located in the main display area is d1, and d2 > d1.
On the basis of the above embodiments, the light control layer 400 is disposed in the additional functional region. The light emitting coverage is enlarged by the light control layer 400, thereby reducing the contrast difference with the main display region from which light is normally emitted. The projection of each protrusion on the light emitting layer 200 covers each sub-pixel 201, and the size and shape of each protrusion need to be designed for the shape or size of each corresponding sub-pixel 201 to form a lens structure, so that the light emitted from the sub-pixel 201 is dispersed at the protrusion through refraction, and the light emitting area is enlarged, thereby improving the light emitting effect of the sub-pixel 201 to the maximum extent.
In the embodiment of the present invention, in the light modulation layer 400, the light modulation layer 401 is located on a side close to the light emitting layer 200, the planarization layer 402 is located on a side away from the light emitting layer 200, that is, the light modulation layer 401 is located below in the figure, the planarization layer 402 is located above in the figure, when the refractive index of the light modulation layer 401 on a side close to the light emitting layer 200 is n1, the refractive index of the planarization layer 402 on a side away from the light emitting layer 200 is n2, and n1 is less than n2, the convex portion protrudes towards a side away from the light emitting layer 200, and when light is incident from an optically thinner medium into an optically denser medium, the refraction angle is smaller than the incident angle, and by designing an interface protruding towards a side away from the light emitting layer 200, the emitted light is made to exhibit a dispersion phenomenon relative to the incident light.
In another embodiment of the present invention, as shown in fig. 3, fig. 3 is a schematic structural diagram of a display panel in an embodiment of the present invention. In the light modulation layer 400, the light modulation layer 401 is located at one side close to the light emitting layer 200, the planarization layer 402 is located at one side far away from the light emitting layer 200, that is, the light modulation layer 401 is located below the drawing, the planarization layer 402 is located above the drawing, when the light modulation layer 401 is located at one side close to the light emitting layer 200, the refractive index of the light modulation layer 401 is n1, the refractive index of the planarization layer 402 is n2, n1 is greater than n2, the convex portion protrudes toward one side close to the light emitting layer 200, and when light is injected into the light-scattering medium by the optically dense medium, the refraction angle is greater than the incident angle, and the design is utilized to emit an interface protruding toward one side close to the light emitting layer 200, so that the emergent light shows a dispersion phenomenon relative to the incident light.
In the above embodiments, it is only enumerated that the light modulation layer 400 includes one light modulation layer 401 and one planarization layer 402. In practical production, the light modulation layer 400 may further include a plurality of light modulation layers 401 and a planarization layer 402, wherein each of the light modulation layers 401 has a plurality of protrusions, but the size and shape of the protrusions gradually change with the distance from the light emitting layer 200, and if the protrusions are hemispherical, the diameters of the protrusions increase with the distance from the light emitting layer 200, so that the light emitted from the sub-pixels 201 in the light emitting layer 200 is emitted after being dispersed for a plurality of times.
It is worth mentioning that in the display panel of some embodiments, the substrate 100 includes a first polyimide layer 101, a buffer layer 102, a second polyimide layer 103, and an array substrate layer 104, which are sequentially stacked, a thin film encapsulation layer 600 is further included between the light emitting layer 200 and the touch layer 300, and the surface of the light control layer 400 further includes a polarization layer 700 and a cover plate layer 800, which are stacked.
In order to better manufacture the display panel in the embodiment of the present invention, on the basis of the display panel, the embodiment of the present invention further provides a manufacturing method of the display panel, where the manufacturing method is used for manufacturing the display panel as described in the above embodiment.
As shown in fig. 4, fig. 4 is a flow chart of a manufacturing method in one embodiment of the present invention. The preparation method comprises the following steps:
s1, providing a substrate 100, and preparing a light-emitting layer 200 on the substrate, wherein the light-emitting layer 200 comprises a plurality of sub-pixels 201;
s2, preparing a touch layer 300 on the light-emitting layer 200;
s3, preparing a light regulation and control layer 400 on one side, away from the substrate 100, of the touch layer 300 to obtain the display panel;
the display panel includes a main display area and an additional function area, the light control layer 400 is correspondingly disposed in the additional function area, and the number of the sub-pixels 201 in the additional function area is less than the number of the sub-pixels 201 in the main display area.
Specifically, the preparation of the light control layer 400 includes: preparing at least one dimming layer 401 on the touch layer 300; preparing a plurality of convex parts on the surface of the at least one dimming layer 401; and preparing a planarization layer 402 having a different refractive index on the convex portion.
Further, the at least one light modulation layer 401 and the planarization layer 402 are prepared by an inkjet printing or spin coating method, and the plurality of protrusions are prepared by an inkjet printing, nanoimprinting, or exposure development method.
The light adjusting layer 400 is made of an organic material, has a light transmittance of more than 90%, and comprises acrylic acid, hexamethyldisiloxane, polyacrylates, polycarbonates or polystyrene, the light adjusting layer 401 and the planarization layer 402 are made of the above materials to adjust light, the light adjusting layer 401 and the planarization layer 402 may be made of the same or different materials, the above materials are only preferred solutions, and in actual production, other materials meeting standards may be used.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed descriptions of other embodiments, and are not described herein again. In specific implementation, each unit or structure may be implemented as an independent entity, or may be combined arbitrarily to be implemented as the same entity or several entities, and specific implementations of each unit, structure, or operation may refer to the foregoing method embodiment, which is not described herein again.
The above embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are explained by applying specific embodiments, and the description of the above embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A display panel including a main display area and an additional function area, the display panel comprising:
a substrate;
a light emitting layer disposed on the substrate, the light emitting layer including a plurality of sub-pixels;
the touch layer is arranged on the luminous layer; and
the light regulation and control layer is arranged on one side of the touch control layer, which is far away from the substrate;
the light modulation layer is correspondingly arranged in the additional functional area, the light modulation layer forms a plurality of convex parts, and the projection of each convex part on the light emitting layer covers each sub-pixel and is used for dispersing light rays emitted from the light emitting layer of the additional functional area; the number of the sub-pixels positioned in the additional function area is less than that of the sub-pixels positioned in the main display area;
the light modulation layer comprises a plurality of light modulation layers and a planarization layer, each light modulation layer is provided with a plurality of convex parts, the convex parts are hemispherical, and the diameters of the convex parts increase progressively with the increase of the distance from the light emitting layer.
2. The display panel according to claim 1, wherein a refractive index between the light modulation layer and the planarization layer is different and a contact surface of the light modulation layer includes the plurality of convex portions.
3. The display panel according to claim 2, wherein a shape or size of each of the convex portions corresponds to a shape or size of each of the sub-pixels in the light-emitting layer.
4. The display panel according to claim 2, wherein the convex portion is convex toward a side away from the light-emitting layer when a refractive index of the light-modulating layer on a side close to the light-emitting layer is smaller than a refractive index of the planarizing layer on a side away from the light-emitting layer.
5. The display panel according to claim 2, wherein the convex portion is convex toward the light-emitting layer side when the refractive index of the light modulation layer on the light-emitting layer side is larger than the refractive index of the planarization layer on the light-emitting layer side.
6. The display panel according to claim 1, wherein a pitch between adjacent sub-pixels located in the additional function region is larger than a pitch between adjacent sub-pixels located in the main display region.
7. A method for manufacturing a display panel, comprising:
providing a substrate, and preparing a light-emitting layer on the substrate, wherein the light-emitting layer comprises a plurality of sub-pixels;
preparing a touch layer on the light-emitting layer;
preparing a light regulation and control layer on one side of the touch control layer, which is far away from the substrate, so as to obtain the display panel;
the display panel comprises a main display area and an additional function area, the light regulation and control layer is correspondingly arranged in the additional function area, the light regulation and control layer forms a plurality of convex parts, and the projection of each convex part on the light emitting layer covers each sub-pixel; the number of the sub-pixels positioned in the additional function area is less than that of the sub-pixels positioned in the main display area; the light modulation layer comprises a plurality of light modulation layers and a planarization layer, each light modulation layer is provided with a plurality of convex parts, and the size and the shape of each convex part are gradually changed along with the distance from the light emitting layer; the convex part is hemispherical, and the diameter of the convex part increases with the distance from the light-emitting layer.
8. The production method according to claim 7, wherein producing the light modulation layer includes: preparing at least one dimming layer on the touch layer; preparing a plurality of convex parts on the surface of the at least one dimming layer; and preparing a planarization layer having a different refractive index on the convex portion.
9. The method according to claim 8, wherein the at least one light modulation layer and the planarization layer are formed by an inkjet printing or spin coating method, and the plurality of protrusions are formed by an inkjet printing, nanoimprinting, or exposure development method.
10. The method of claim 7, wherein the light control layer is made of a material selected from the group consisting of acrylic acid, hexamethyldisiloxane, polyacrylates, polycarbonates, and polystyrene.
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KR20130100629A (en) * 2012-03-02 2013-09-11 삼성디스플레이 주식회사 Organic light emitting display device
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US9209230B2 (en) * 2012-12-21 2015-12-08 Samsung Electronics Co., Ltd Optical films for reducing color shift and organic light-emitting display apparatuses employing the same
KR101749147B1 (en) * 2015-10-30 2017-06-21 엘지디스플레이 주식회사 Organic light emitting display device and method for manufacturing the same
CN108538900B (en) * 2018-05-14 2021-04-23 昆山国显光电有限公司 Display screen and display device
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