CN113517321A

CN113517321A - Display panel, display device and manufacturing method

Info

Publication number: CN113517321A
Application number: CN202110543620.XA
Authority: CN
Inventors: 孔超; 张如芹; 曹鹏; 袁德
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2021-10-19

Abstract

The invention discloses a display panel, a display device and a manufacturing method, wherein the display panel of one embodiment comprises: the LED packaging structure comprises a substrate, a driving circuit layer, a light-emitting device layer, a packaging layer and a color film layer, wherein the driving circuit layer, the light-emitting device layer, the packaging layer and the color film layer are sequentially stacked on the substrate; the light-emitting device further comprises an adjusting layer arranged on the substrate and used for adjusting the light-emitting angle of each sub-pixel of the light-emitting device layer so that the light-emitting angle of each sub-pixel is larger than a preset angle threshold value. Aiming at the existing problems, the invention provides the display panel, the light-emitting angle of each sub-pixel in the light-emitting device layer is increased by arranging the adjusting layer on the substrate, the power consumption and the color cast are effectively reduced, the problem of brightness attenuation of the display panel along with the visual angle in the prior art can be improved, and the display panel has wide application prospect.

Description

Display panel, display device and manufacturing method

Technical Field

The invention relates to the technical field of display, in particular to a display panel, a display device and a manufacturing method.

Background

An Active Matrix Organic Light Emitting Device (AMOLED) has the advantages of self-luminescence (without a backlight), wide viewing angle, low power consumption, flexible (folding, curling) display and the like, and is one of the most promising display technologies at present. With the increasing popularization of the traditional OLED display products, consumers pay more attention to low power consumption on the basis of power saving and long-time endurance; meanwhile, the development of foldable and rollable screens makes the difficulty of ensuring the characteristics of 3D laminating technology, color cast, brightness and the like of a bending area rise continuously.

In order to ensure the contrast of a screen in different external environments and reduce the reflection of the screen to ambient light, a Polarizer (POL) is generally used above a current light-emitting encapsulation layer to ensure the display effect of the screen. At present, the thickness of the polaroid is generally 50-150 micrometers, the thickness is relatively thick, the bending property is poor, obvious creases can appear after repeated bending, the screen cannot be curled, and the application range of the OLED screen is greatly limited. In addition, the transmittance (Tr) of POL is relatively poor, typically at the level of 38% to 46%, which is also disadvantageous for achieving low power consumption and long lifetime of OLED devices. The above two disadvantages are not favorable for further development and application of OLED technology.

Disclosure of Invention

In order to solve at least one of the above problems, a first embodiment of the present invention provides a display panel including a substrate, a driving circuit layer, a light emitting device layer, an encapsulation layer, and a color film layer sequentially stacked on the substrate, the light emitting device layer including a plurality of pixels arranged in an array, each pixel including a plurality of sub-pixels,

the light-emitting device further comprises an adjusting layer arranged on the substrate and used for adjusting the light-emitting angle of each sub-pixel of the light-emitting device layer so that the light-emitting angle of each sub-pixel is larger than a preset angle threshold value.

In a particular embodiment, the adjustment layer includes a first adjustment sublayer and a second adjustment sublayer;

the color film layer comprises:

a first color filter corresponding to the light emitting material of each sub-pixel;

the black matrix is used as the first adjusting sublayer and surrounds the first color filter, and the width of the black matrix between the adjacent first color filters in a cross-sectional view perpendicular to the substrate direction is a preset width threshold value; and

the first touch control structure layer is arranged on one side, far away from the substrate, of the black matrix and serves as the second adjusting sublayer; wherein

And the orthographic projection of the black matrix on the substrate covers the orthographic projection of the first touch control structure layer on the substrate.

In one embodiment, a width of the first touch structure layer in a cross-sectional view perpendicular to a substrate direction is smaller than the preset width threshold;

the first touch control structure layer comprises a first touch control structure sublayer arranged on the black matrix and an opaque auxiliary film layer which is used as the second adjusting sublayer and covers the first touch control structure sublayer, and the reflectivity of the auxiliary film layer is smaller than or equal to a preset reflectivity threshold value;

or

The first touch control structure layer comprises an opaque second touch control structure sub-layer arranged on the black matrix, and the reflectivity of the second touch control structure sub-layer is smaller than or equal to a preset reflectivity threshold value.

In a particular embodiment, the adjustment layer comprises a third adjustment sublayer;

the color film layer comprises:

a second color filter corresponding to the light emitting material of each sub-pixel; and

and the second touch control structure layer is used as an opaque second touch control structure layer of the third adjusting sublayer, the second touch control structure layer surrounds the second color filters, and the width of the second touch control structure layer between the adjacent second color filters in a cross-sectional view perpendicular to the substrate direction is a preset width threshold value.

In a specific embodiment, the second touch structure layer includes a third touch structure sublayer disposed on the encapsulation layer and an opaque auxiliary film layer serving as the third adjustment sublayer and covering the third touch structure sublayer, and a reflectivity of the auxiliary film layer is less than or equal to a preset reflectivity threshold;

or

The second touch structure layer comprises an opaque fourth touch structure sublayer arranged on the packaging layer, and the reflectivity of the fourth touch structure sublayer is smaller than or equal to a preset reflectivity threshold value.

In a particular embodiment, the adjustment layer includes a fourth adjustment sublayer and a fifth adjustment sublayer;

the light emitting device layer includes:

a light emitting material of each sub-pixel; and

an opaque pixel defining layer surrounding the light emitting material and serving as the fourth adjustment sublayer,

the reflectivity of the opaque pixel definition layer is less than or equal to a preset reflectivity threshold;

the color film layer comprises:

a third color filter corresponding to the light emitting material of each sub-pixel; and

an opaque third touch structure layer serving as the fifth adjustment sublayer, wherein the third touch structure layer surrounds the third color filters, and the width of the third touch structure layer between adjacent third color filters in a cross-sectional view perpendicular to the substrate direction is smaller than a preset width threshold;

an orthographic projection of the opaque pixel defining layer on the substrate covers an orthographic projection of the third touch structure layer on the substrate.

In a specific embodiment, the third touch structure layer includes a fifth touch structure sublayer disposed on the encapsulation layer and an opaque auxiliary film layer serving as the fifth adjustment sublayer and covering the fifth touch structure sublayer, and a reflectivity of the auxiliary film layer is less than or equal to a preset reflectivity threshold;

or

The third touch control structure layer comprises an opaque sixth touch control structure sublayer arranged on the packaging layer, and the reflectivity of the sixth touch control structure sublayer is smaller than or equal to a preset reflectivity threshold value.

In one embodiment, the auxiliary film layer is a conductive material or a non-conductive material.

In a specific embodiment, the auxiliary film layer is one of a carbide film, a black polyimide resin material, graphite, and a metal oxide material.

A second embodiment of the invention provides a display device comprising the display panel as described above.

A third embodiment of the present invention provides a method for manufacturing the display panel, including:

the substrate stacks gradually and forms drive circuit layer, light emitting device layer, packaging layer and various rete on the substrate, wherein light emitting device layer includes a plurality of pixels of array arrangement, and every pixel includes a plurality of sub-pixels, still includes:

and forming an adjusting layer on the substrate, wherein the adjusting layer is used for adjusting the light-emitting angle of each sub-pixel of the light-emitting device layer so that the light-emitting angle of each sub-pixel is larger than a preset angle threshold value.

In a particular embodiment, the adjustment layer includes a first adjustment sublayer and a second adjustment sublayer; the forming an adjustment layer on a substrate further comprises:

forming a black matrix as a first adjustment sublayer on the encapsulation layer;

forming a first color filter corresponding to the luminescent material of each sub-pixel on the packaging layer, wherein the black matrix surrounds the first color filter, and the width of the black matrix between the adjacent first color filters in a cross-sectional view perpendicular to the substrate direction is a preset width threshold;

and forming a first touch control structure layer serving as the second adjusting sublayer on the black matrix, wherein the orthographic projection of the black matrix on the substrate covers the orthographic projection of the first touch control structure layer on the substrate.

In a particular embodiment, the adjustment layer comprises a third adjustment sublayer; the forming an adjustment layer on a substrate further comprises:

forming an opaque second touch control structure layer serving as the third adjusting sublayer on the packaging layer;

and forming a second color filter corresponding to the luminescent material of each sub-pixel on the packaging layer, wherein the second touch structure layer surrounds the second color filter, and the width of the second touch structure layer between the adjacent second color filters in a cross-sectional view perpendicular to the substrate direction is a preset width threshold.

In a particular embodiment, the adjustment layer includes a fourth adjustment sublayer and a fifth adjustment sublayer; the forming an adjustment layer on a substrate further comprises:

forming an opaque pixel defining layer as the fourth adjustment sublayer on the light emitting device layer, wherein the opaque pixel defining layer defines a light emitting material of each sub-pixel, and the reflectivity of the opaque pixel defining layer is less than or equal to a preset reflectivity threshold;

forming an opaque third touch control structure layer serving as the fifth adjustment sub-layer on the encapsulation layer, wherein an orthographic projection of the opaque pixel definition layer on the substrate covers an orthographic projection of the third touch control structure layer on the substrate;

and forming third color filters corresponding to the luminescent materials of the sub-pixels on the packaging layer, wherein the third touch structure layer surrounds the third color filters, and the width of the third touch structure layer between the adjacent third color filters in a cross section perpendicular to the substrate direction is smaller than a preset width threshold.

The invention has the following beneficial effects:

aiming at the existing problems, the invention provides the display panel, the light-emitting angle of each sub-pixel in the light-emitting device layer is increased by arranging the adjusting layer on the substrate, the power consumption and the color cast are effectively reduced, the problem of brightness attenuation of the display panel along with the visual angle in the prior art can be improved, and the display panel has wide application prospect.

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 view showing a structure of a display device using a polarizer in the related art;

FIG. 2 shows a schematic diagram of a pixel structure of an AMOLED display applying COE technology;

FIG. 3 is a schematic diagram of a pixel structure commonly used in current displays;

FIG. 4 is a schematic diagram showing the luminance decay (L-decay) of a COE structured color filter in an OLED assembly;

FIG. 5 is a schematic diagram of a display panel of a conventional COE structure;

FIG. 6 shows a schematic structural diagram of a display panel according to an embodiment of the present application;

FIG. 7 shows a schematic flow diagram of a method of fabricating a display panel according to an embodiment of the present application;

FIG. 8 shows a schematic flow diagram of a method of fabricating a display panel according to yet another embodiment of the present application;

fig. 9 shows a schematic structural diagram of a display panel according to yet another embodiment of the present application;

fig. 10 shows a schematic structural diagram of a display panel according to yet another embodiment of the present application;

FIG. 11 shows a flow diagram of a method of fabricating a display panel according to yet another embodiment of the present application;

fig. 12 shows a schematic structural diagram of a display panel according to yet another embodiment of the present application;

fig. 13 shows a schematic structural diagram of a display panel according to yet another embodiment of the present application;

fig. 14 shows a flow chart of a method of fabricating a display panel according to yet another embodiment of the present application.

Detailed Description

In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.

It is noted that references herein to "on … …", "formed on … …" and "disposed on … …" can mean that one layer is formed or disposed directly on another layer or that one layer is formed or disposed indirectly on another layer, i.e., there is another layer between the two layers. As used herein, unless otherwise specified, the term "on the same layer" means that two layers, components, members, elements or portions can be formed by the same patterning process, and the two layers, components, members, elements or portions are generally formed of the same material. Herein, unless otherwise specified, the expression "patterning process" generally includes the steps of coating of photoresist, exposure, development, etching, stripping of photoresist, and the like. The expression "one-time patterning process" means a process of forming a patterned layer, member, or the like using one mask plate.

In order to ensure the contrast of the display screen under different external environments and reduce the reflection of ambient light, as shown in fig. 1, a polarizer 16 is usually disposed above the encapsulation layer 14 to ensure the display effect of the screen. However, the thickness of the polarizer is generally 50 to 150 micrometers, and the thickness of the polarizer is relatively thick, so that the display device has poor bending property, obvious creases appear after repeated bending, and the screen cannot be curled; in addition, the transmittance (Tr) of the polarizer is relatively poor, generally 38% to 46%, which is not favorable for realizing low power consumption and long service life of the OLED device, and greatly limits the application range of the OLED screen.

In the prior art, a coe (color Filter on encapsulation) scheme is usually adopted to replace a polarizer structure shown in fig. 1, which is an effective method for improving transmittance, so that a thinner display screen module can be obtained, the difficulty of 3D attachment is reduced, and further development of a foldable and rollable screen is facilitated. The COE technology is generally applied to LCD display devices, and also applied to large-size OLED devices with bottom emission.

Fig. 2 is a schematic diagram of a pixel structure of an AMOLED display applying the COE technology, which includes an emission area of R, G, B sub-pixels, a black film (BM)302 for reducing reflection, and a distance between the pixel area and the BM, i.e., BM out 304. Fig. 3 is a pixel structure commonly used in the present display, wherein the pixel units are arranged in an RGBG pixel structure, and include a red sub-pixel, a green sub-pixel, a blue sub-pixel, a ps (photo spacer), and a Flexible multilayer integrated touch layer (FMLOC). The red sub-pixel, the green sub-pixel and the blue sub-pixel form a pixel unit, the pixel unit comprises a light-emitting function layer of each sub-pixel, and the pixel unit comprises a hole injection layer, a hole transport layer, a hole blocking layer, an electron transport layer, an electron injection layer, a cathode, a light coupling layer (CPL), an encapsulation layer and the like which are the same, and an open mask (open mask) is generally adopted for evaporation. In addition, the light-emitting function layers of all colors also comprise respective micro-cavity adjusting layers and light-emitting layers, and fine metal mask plates are adopted for evaporation. Wherein, PS is the supporting layer for support meticulous metal mask plate among the coating by vaporization process.

Fig. 4 shows a luminance decay (L-decay) diagram of a color filter of a COE structure in an organic light emitting diode assembly, and it can be seen from fig. 4 that the smaller the BM opening angle, the greater the L-decay degree, the greater the loss of light, and the higher the power consumption. To reduce the loss of L-budget and power consumption, the distance of BM out is generally increased, which however affects the reflectivity of the device. The device with the COE structure comprises a large number of metal wires, and the phenomena of great reduction of panel contrast and color separation exist.

Specifically, referring to fig. 5, which is a schematic diagram of a display panel with a COE structure in the prior art, the color film layer includes a black matrix 17 and a color filter 18, where the black matrix 17 is a black light blocking layer, which can reduce light reflection and increase contrast. Specifically, the black matrix 17 of the color film layer is disposed above the driving circuit layer 12, so that the metal in the driving circuit layer can be shielded and the reflection of the external ambient light can be reduced. The color filter 18 (CF) of the color film layer has a higher transmittance, generally 60%, compared to the OLED light emitting device of the polarizer structure shown in fig. 1, and thus, the power consumption of the display device shown in fig. 5 is lower than that of the display device shown in fig. 1.

Unlike bottom-emitting devices, top-emitting OLED devices utilize microcavity structures to improve efficiency, which can typically be twice as efficient as bottom-emitting OLED devices. The microcavity structure causes the characteristics of the top-emitting OLED, such as brightness, color coordinates, efficiency, to be more sensitive to the change of angles, and therefore, color shift is always an inherent problem in the top-emitting OLED device. Although the COE structure shown in fig. 5 has a characteristic of realizing bending and curling of a screen, the COE structure improves contrast ratio for reducing ambient light reflection, and avoids color mixing caused by multiple reflections of sub-pixel outgoing light on the surface of the COE, and a black matrix 17 (BM) light absorption structure is introduced into a non-pixel area through a color film layer, so that luminance attenuation of the sub-pixel outgoing light along with increase of a viewing angle is more serious (L-Decay), which further aggravates difficulty of using the COE structure for a top emission OLED device. Even if the user can not be influenced to obtain the information of the display screen, the displayed color cast can be influenced, and the visual experience of the user is reduced. In the AMOLED device using the COE structure, the BM has a great shielding effect on light, so that the efficiency of the device is reduced, and the power consumption benefit brought by the POL replaced by the optical filter is reduced. Therefore, only by overcoming the above various disadvantages of the top-emitting OLED of the COE structure and increasing the light-emitting angle, which is the connection line between the light-emitting material 131 and the black matrix 17 in fig. 5 and is marked as θ, the technique can be really applied to the field of the top-emitting OLED, so as to obtain a better display effect.

To this end, a first embodiment of the present invention provides a display panel, as shown in fig. 6, including: the light emitting device comprises a substrate 11, a driving circuit layer 12, a light emitting device layer 13, an encapsulation layer 14 and a color film layer, wherein the driving circuit layer 12, the light emitting device layer 13, the encapsulation layer 14 and the color film layer are sequentially stacked on the substrate, the light emitting device layer 13 comprises a plurality of pixels which are arranged in an array, each pixel comprises a plurality of sub-pixels, and an adjusting layer is arranged on the substrate and is used for adjusting the light emitting angle of each sub-pixel of the light emitting device layer 13 so that the light emitting angle of each sub-pixel is larger than a preset angle threshold theta.

According to the display panel provided by the embodiment, the adjusting layer is arranged on the substrate, so that the light-emitting angle of each sub-pixel in the light-emitting device layer is increased, the power consumption and the color cast are effectively reduced, the problem of brightness attenuation of the display panel along with the increase of a visual angle in the prior art can be solved, and the display panel has a wide application prospect.

In the present embodiment, the substrate 11 is a flexible PI substrate; the driving circuit layer 12 includes Buffer layers, active P-Si layers, Gate insulation GI layers, Gate layers, interlayer insulation ILD layers, source drain SD layers, and other functional layers. The display panel further includes an Anode (Anode) layer, and an Anode structure of the Anode layer may be ITO/Ag/ITO, where ITO is 10nm and Ag is 100nm, or other Anode structures with higher reflectivity.

In one particular example, as shown in figure 6,

the adjustment layer comprises a first adjustment sublayer and a second adjustment sublayer;

the color film layer comprises a first color filter 18 corresponding to the luminescent material 131 of each sub-pixel, a black matrix 17 and a first touch control structure layer;

the black matrix 17 is used to shield the metal layer in the driving circuit layer 12, absorb external ambient light, and is a first adjustment sub-layer. The black matrix 17 surrounds the first color filters 18, and the width of the black matrix 17 between adjacent first color filters 18 in a cross-sectional view perpendicular to the substrate direction is a preset width threshold, i.e., L in fig. 6.

The first touch control structure layer shields the metal layer inside the first touch control structure layer on one hand, and reflects external ambient light with low reflectivity on the other hand, and the first touch control structure layer serves as a second adjusting sublayer. The first touch structure layer is disposed on a side of the black matrix 17 away from the substrate 11, as shown in fig. 6, an orthographic projection of the black matrix 17 on the substrate 11 covers an orthographic projection of the first touch structure layer on the substrate.

Compared with fig. 5, in this embodiment, the position of the black matrix is adjusted to increase the light-emitting angle of each sub-pixel of the light-emitting device layer, that is, the light-emitting angle is larger as the black matrix is closer to the substrate under the condition that the preset width threshold of the black matrix is not changed, the light-emitting angle is the included angle between the light-emitting material and the connection line of the black matrix, that is, θ 1 in fig. 6, and the light-emitting angle θ is₁Greater than the light exit angle θ of fig. 5, i.e., greater than a preset angle threshold.

In this embodiment, by providing the black matrix and the first touch structure layer on the substrate, under the condition that the width of the black matrix is not changed, and under the condition that the shielding function of the metal layer of the driving circuit layer and the metal of the touch structure layer and the absorption function of external ambient light are not changed, the light-emitting angle of each sub-pixel in the light-emitting device layer is increased, power consumption and color cast are effectively reduced, and the problem of brightness attenuation of the display panel along with the increase of the viewing angle in the prior art can be solved.

Since the black matrix already shields the metal layer of the driving circuit layer, and the first touch structure layer only shields the internal metal layer, in an optional example, the width of the first touch structure layer in the cross-sectional view perpendicular to the substrate direction is smaller than the width of the black matrix in the cross-sectional view perpendicular to the substrate direction, as shown in fig. 6, that is, the width L of the first touch structure layer₁Is smaller than the width L of the black matrix.

It should be noted that the black matrix is a mesh structure, the width of the black matrix is inversely proportional to the resolution of the display panel, and when the resolution of the display panel is 400PPI, the width of the black matrix is set to be 5-17 μm. Meanwhile, the width of the first touch control structure layer is in inverse proportion to the resolution of the display panel, and when the resolution of the display panel is 400PPI, the width of the first touch control structure layer is set to be 1-15 micrometers. In other words, when the resolution of the display panel is higher, the width of the black matrix is smaller, and the width of the first touch structure layer is also smaller.

As shown in fig. 6, in a specific example, the first touch structure layer includes a first touch structure sub-layer 15 disposed on the black matrix and an opaque auxiliary film layer 19 as the second adjustment sub-layer covering the first touch structure sub-layer, and a reflectivity of the auxiliary film layer is less than or equal to a preset reflectivity threshold.

The auxiliary film layer is not limited by the application, and can shield metal inside the first touch structure layer and reduce reflection of external ambient light, for example, the auxiliary film layer may be a carbide thin film (TiWC), a black polyimide resin material, a graphite inorganic material, a metal oxide material, or the like, wherein the metal oxide material may be ferroferric oxide or copper oxide (CuO); manganese dioxide (MnO2), and the like; the material may be a colored material such as tungsten oxide, molybdenum oxide, vanadium oxide, or titanium oxide.

The thickness of the auxiliary film layer is determined according to the requirement of transmittance, and in this embodiment, the thickness of the auxiliary film layer is 10 nanometers to 10 micrometers.

In another specific example, the first touch structure layer includes an opaque second touch structure sub-layer disposed on the black matrix 17, and a reflectivity of the second touch structure sub-layer is less than or equal to a preset reflectivity threshold.

In this embodiment, the opaque second touch structure sub-layer is used to shield the metal therein and reduce the reflection of the external ambient light.

The application does not limit the value of the preset reflectivity threshold value, so that the auxiliary film layer or the opaque second touch sub-layer can shield metal inside the first touch structure layer and reduce reflection of external ambient light as a design criterion.

The following description will be made by taking the fabrication of the display panel of this embodiment as an example, and the specific fabrication process is shown in fig. 7:

s10, sequentially stacking a driving circuit layer, a light-emitting device layer, a packaging layer and a color film layer on a substrate, wherein the light-emitting device layer comprises a plurality of pixels arranged in an array, and each pixel comprises a plurality of sub-pixels;

in this embodiment, a driver circuit layer, a light emitting device layer, and an encapsulation layer are first sequentially stacked and formed on a substrate. The packaging layer is an inorganic layer such as SiNx or SiNOx prepared by Chemical Vapor Deposition (CVD), the inorganic layer can be a single layer or multiple layers, and organic matters among multiple layers of inorganic matters can be prepared by an ink-jet printing IJP method.

And S20, forming an adjusting layer on the substrate, wherein the adjusting layer is used for adjusting the light-emitting angle of each sub-pixel of the light-emitting device layer so that the light-emitting angle of each sub-pixel is larger than a preset angle threshold value.

In this embodiment, a color film layer is formed as an adjustment layer on the encapsulation layer.

In one particular example, the adjustment layer includes a first adjustment sublayer and a second adjustment sublayer; as shown in fig. 8, the S20 further includes:

s200, forming a black matrix serving as a first adjusting sublayer on the packaging layer;

s202, forming first color filters corresponding to the luminescent materials of the sub-pixels on the packaging layer, wherein the black matrixes surround the first color filters, and the width of the black matrixes between the adjacent first color filters in a cross-sectional view perpendicular to the substrate direction is a preset width threshold;

and S204, forming a first touch control structure layer serving as the second adjusting sublayer on the black matrix, wherein the orthographic projection of the black matrix on the substrate covers the orthographic projection of the first touch control structure layer on the substrate.

In a specific example, an opaque BM thin film is prepared on the encapsulation layer, the thickness of the BM thin film can be 1-5 microns, and the BM thin film is used as a first adjusting sublayer for adjusting color shift and reducing reflection, and can be made into a thin film by a spin coating method, and patterning is realized by using a photoetching exposure method.

The color filters, namely color films of three colors of RGB, are prepared above the sub-pixels by using a spin coating and exposure method, and the positions of the color filters are positioned at the periphery of the luminous sub-pixels and used for reducing the reflectivity of ambient light above the sub-pixels.

Further, a first touch structure layer is formed above the black matrix, and in this embodiment, the first touch structure layer is an opaque Flexible multilayer integrated touch layer (FMLOC) or a composite structure of the FMLOC layer and the auxiliary film layer, and is used for shielding metal inside the first touch structure layer and reducing reflection of external ambient light.

The FMLOC layer generally adopts a Ti/Al/Ti multilayer structure, and the structure of the FMLOC layer is not particularly limited in the present application, and those skilled in the art should select an appropriate structure according to actual needs. The FMLOC layer of this embodiment adopts a double-layer structure, as shown in table 1, which is a schematic diagram of interlayer materials and process parameters of the FMLOC with double layers of Ti/Al/Ti in this embodiment.

TABLE 1

It should be understood by those skilled in the art that the display panel shown in fig. 6 is exemplary, and other film layers, for example, a cover plate cover layer, an Anti-Reflection cover Glass (Anti-Reflection cover Glass), an Anti-Reflection layer, a micro-lens layer and other functional layers, can be further prepared as required above the first touch structure layer, which is not described herein again.

Since the manufacturing method provided by the embodiment of the present application corresponds to the display panel provided by the above embodiment, the previous embodiment is also applicable to the manufacturing method provided by the present embodiment, and is not described in detail in the present embodiment.

In the embodiment, the black matrix and the first touch control structure layer are arranged on the substrate, so that the light-emitting angle of each sub-pixel in the light-emitting device layer is increased, the power consumption and the color cast are effectively reduced, and the problem of brightness attenuation of the display panel along with the increase of the viewing angle in the prior art can be solved.

In one particular embodiment, as shown in figure 9,

the adjustment layer comprises a third adjustment sublayer;

the color film layer includes a second color filter 18 corresponding to each sub-pixel and an opaque second touch structure layer 20.

The second touch structure layer 20 is configured to shield a metal layer in the driving circuit layer 12 and a metal layer inside the driving circuit layer, and absorb external ambient light, and specifically includes a third touch structure sublayer 15 disposed on the encapsulation layer 14 and an opaque auxiliary film layer 19 serving as the third adjustment sublayer and covering the third touch structure sublayer 15, where a reflectivity of the auxiliary film layer is less than or equal to a preset reflectivity threshold, so as to reduce reflection of the external ambient light, and improve color shift.

The second touch structure layer 20 is a third adjustment sublayer, and a width of the second touch structure layer 20 between adjacent second color filters 18 in a cross-sectional view perpendicular to the substrate direction is a preset width threshold, that is, L₂Equal to L.

In the embodiment, the opaque second touch structure layer 20 is used to replace the black matrix shown in fig. 6, so that the light reflection can be reduced, the problems of color cast, large viewing angle brightness attenuation and the like caused by the fact that the color cast of the COE structure must be reduced by using the Black Matrix (BM), and a better display effect can be achieved. Meanwhile, the process can be simplified, and the process step of BM preparation is reduced.

In a specific example, as shown in fig. 9, the opaque second touch structure layer 20 includes a third touch structure sub-layer FMLOC layer 15 and an auxiliary film layer 19 covering the third touch structure sub-layer and serving as the third adjustment sub-layer, where a reflectivity of the auxiliary film layer is less than or equal to a preset reflectivity threshold, and is used for shielding the metal layer in the driving circuit layer 12 and the metal layer of the third touch structure sub-layer FMLOC layer 15, absorbing external ambient light, and reducing color shift, and a width L of the second touch structure layer 20₂Equal to the width L of the black matrix shown in fig. 5. Detailed description of the inventionThe foregoing embodiments are similar and will not be described again.

In another specific example, as shown in fig. 10, the opaque second touch structure layer 20 includes an opaque fourth touch structure sub-layer, a reflectivity of the fourth touch structure sub-layer is less than or equal to a preset reflectivity threshold, and the opaque fourth touch structure sub-layer is used for shielding the metal layer in the driving circuit layer 12 and the metal layer inside, absorbing external ambient light, and reducing color shift, wherein a width of the fourth touch structure sub-layer in a cross-sectional view perpendicular to the substrate direction is a preset width threshold, that is, L₃L. The detailed description is similar to the previous embodiments and will not be repeated herein.

It should be understood that the light emitting angle of the display panel shown in fig. 9 or fig. 10 is the angle between the connection line of the light emitting material 131 and the second touch control structure layer 20, i.e. θ₂(ii) a Since the opaque second touch control structure layer 20 is close to the substrate relative to the black matrix in fig. 5, the light-emitting angle is larger as the adjusting layer is closer to the substrate, and thus the light-emitting angle θ is larger₂Greater than the exit angle threshold theta of fig. 5.

It should be noted that the same or similar parts of the present embodiment as those of the previous embodiment can be abbreviated. The foregoing embodiments and the advantages thereof are also applicable to the present embodiment, and therefore, the description of the same parts is omitted.

In the embodiment, the opaque second touch control structure layer is arranged on the substrate, so that the light-emitting angle of each sub-pixel in the light-emitting device layer is increased, the power consumption and the color cast are effectively reduced, the problem of brightness attenuation of the display panel along with the increase of the visual angle in the prior art can be solved, and the display panel has a wide application prospect.

In a specific manufacturing process, the adjustment layer comprises a third adjustment sublayer; as shown in fig. 11, the S20 further includes:

s206, forming an opaque second touch control structure layer serving as the third adjusting sublayer on the packaging layer;

and S208, forming second color filters corresponding to the luminescent materials of the sub-pixels on the packaging layer, wherein the second touch structure layer surrounds the second color filters, and the width of the second touch structure layer between the adjacent second color filters in a cross-sectional view perpendicular to the substrate direction is a preset width threshold.

Since the manufacturing method provided by the embodiments of the present application corresponds to the display panel provided by the above-mentioned several embodiments, the previous embodiments are also applicable to the manufacturing method provided by the present embodiment, and detailed description is not provided in the present embodiment.

The opaque second touch control structure layer is arranged on the substrate, so that the light-emitting angle of each sub-pixel in the light-emitting device layer is increased, the power consumption and the color cast are effectively reduced, the problem of brightness attenuation of the display panel along with the increase of the visual angle in the prior art can be solved, and the wide application prospect is achieved.

In one particular embodiment, as shown in figure 12,

the adjusting layer comprises a fourth adjusting layer and a fifth adjusting layer;

the light emitting device layer 13 includes the light emitting material 131 of each sub-pixel and an opaque pixel defining layer 132 surrounding the light emitting material 131; the opaque pixel defining layer 131 is a fourth adjustment sublayer, and the reflectivity of the opaque pixel defining layer 132 is less than or equal to the preset reflectivity threshold, and is used for shielding the metal layer in the driving circuit layer 12 and absorbing external ambient light.

The color film layer includes a third color filter 18 and an opaque third touch structure layer 21 corresponding to each sub-pixel, where the third touch structure layer surrounds 21 the third color filter 18, as shown in fig. 12, the third touch structure layer specifically includes a fifth touch structure sublayer 15 disposed on the encapsulation layer and an opaque auxiliary film layer 19 serving as the fifth adjustment sublayer and covering the fifth touch structure sublayer, and a reflectivity of the auxiliary film layer is less than or equal to a preset reflectivity threshold; the width of the third touch structure layer 21 between adjacent third color filters 18 in a cross-sectional view perpendicular to the substrate 11 direction is less than a preset width threshold, i.e. L₄Is less than L.

An orthographic projection of the opaque pixel defining layer on the substrate covers an orthographic projection of the third touch structure layer on the substrate. In particular, as shown in FIG. 12, the orthographic projection of the opaque pixel defining layer 132 on the substrate 11 covers the orthographic projection of the third touch control structure layer 132 on the substrate, i.e. the width L of the opaque pixel defining layer 132 in the cross-sectional view perpendicular to the substrate 11 direction₅Is greater than the width L of the third touch control structure layer 21 in the cross-sectional view perpendicular to the substrate 11 direction₄。

As shown in fig. 12, the light-emitting angle is an included angle between the light-emitting material and the third touch structure layer, i.e. θ₃Since the width of the opaque third touch structure layer is reduced, the light-emitting angle θ is increased₃The light-emitting angle θ is larger than that of fig. 2, i.e. larger than the preset angle threshold, and is also larger than that of the foregoing embodiment₁And theta₂。

In the present embodiment, by providing the pixel defining layer of the light emitting device layer as an opaque pixel defining layer, black in a preferred example, for shielding the metal layer in the driving circuit layer, external ambient light is absorbed; meanwhile, the width of the opaque third touch control structure layer replacing the black matrix is reduced to increase the light-emitting angle, and the third touch control structure layer shields the metal layer inside the third touch control structure layer on one hand and reflects external ambient light with low reflectivity on the other hand, so that the reflectivity is reduced.

In an optional example, as shown in fig. 13, the third touch structure layer includes an opaque sixth touch structure sub-layer disposed on the encapsulation layer, where a reflectivity of the sixth touch structure sub-layer is less than or equal to a preset reflectivity threshold, and is used for shielding the metal layer in the driving circuit layer 12 and the metal layer inside, absorbing external ambient light, and reducing color shift, where a width of the fourth touch structure sub-layer in a cross-sectional view perpendicular to the substrate direction is less than a preset width threshold, that is, L is less than a preset width threshold₆Is less than L.

An orthographic projection of the opaque pixel definition layer on the substrate covers an orthographic projection of the third touch structure layer on the substrate

As shown in fig. 13, the light-emitting angle is an included angle between the connection lines of the light-emitting material and the third touch structure layer, i.e. θ₃Since the width of the opaque third touch structure layer is reduced,so that the light-emitting angle theta₃The light-emitting angle θ is larger than that of fig. 2, i.e. larger than the preset angle threshold, and is also larger than that of the foregoing embodiment₁And theta₂。

The present embodiment absorbs external ambient light by setting the pixel defining layer of the light emitting device layer to be opaque, black in a preferred example, for shielding the metal layer in the driving circuit layer; meanwhile, the width of the opaque third touch control structure layer replacing the black matrix is reduced to increase the light-emitting angle, and the third touch control structure layer shields the metal layer inside the third touch control structure layer on one hand and reflects external ambient light with low reflectivity on the other hand, so that the reflectivity is reduced.

In a specific manufacturing process, as shown in fig. 14, the adjustment layer includes a fourth adjustment sublayer and a fifth adjustment sublayer; the S20 further includes:

s210, forming an opaque pixel defining layer as the fourth adjustment sublayer on the light emitting device layer, where the opaque pixel defining layer defines a light emitting material of each sub-pixel, and a reflectivity of the opaque pixel defining layer is less than or equal to a preset reflectivity threshold;

s212, forming an opaque third touch structure layer as the fifth adjustment sub-layer on the encapsulation layer, where an orthographic projection of the opaque pixel defining layer on the substrate covers an orthographic projection of the third touch structure layer on the substrate;

and S214, forming third color filters corresponding to the light-emitting materials of the sub-pixels on the packaging layer, wherein the third touch structure layer surrounds the third color filters, and the width of the third touch structure layer between the adjacent third color filters in a cross section perpendicular to the substrate direction is smaller than a preset width threshold.

In the embodiment, the pixel defining layer is set to be opaque and used for shielding the metal layer in the driving circuit layer and reflecting external ambient light, so that the width of the third touch control structure layer can be reduced, and the purpose of further increasing the light-emitting angle is achieved.

Table 2 shows the color shift, luminance degradation, and power consumption of the display device of the present application compared to the conventional POL structure and the conventional COE structure. Specifically, comparisons were made in different types: the power consumption of the POL structure in the prior art is 4.1W, the power consumption of the COE structure in the prior art is 3.28W, and the power consumption in this application is 2.88W, and it can be seen that the display panel provided by this application can achieve the effect of reducing the power consumption compared with the existing POL structure and the existing COE structure. Similarly, in comparison with a viewing angle of 30 °, the color shift of the conventional POL structure shown in fig. 1 is 3.0 and the luminance attenuation is 33% at a viewing angle of 30 °; fig. 5 shows that the color shift of the conventional COE structure at a viewing angle of 30 ° is 3.4, and the luminance degradation is 40%; the color cast of this application when visual angle 30 is 2.7, and the luminance decay is 66%, and it can reach the effect that reduces the color cast and improve the luminance decay to see the display panel that this application provided in comparison with current COE structure, can reduce the consumption by a wide margin to current POL structure relatively.

TABLE 2

As can be seen from table 2, in the technical solution of the present application, by providing the adjustment layer on the substrate, the light-emitting angle of each sub-pixel of the light-emitting device layer can be adjusted so that the light-emitting angle of each sub-pixel is greater than a preset angle threshold, which effectively improves color shift, reduces luminance attenuation, and reduces power consumption, and has a wide application prospect.

Another embodiment of the present invention provides a display device including the flexible display panel according to the above embodiment, and the display device is an electroluminescent diode display device. The display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame or a navigator.

It is to be noted that, in the description of the present invention, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.

Claims

1. A display panel comprises a substrate, a drive circuit layer, a light-emitting device layer, a packaging layer and a color film layer which are sequentially stacked on the substrate, wherein the light-emitting device layer comprises a plurality of pixels which are arranged in an array, each pixel comprises a plurality of sub-pixels, and the display panel is characterized in that,

2. The display panel of claim 1, wherein the adjustment layer comprises a first adjustment sublayer and a second adjustment sublayer;

the color film layer comprises:

3. The display panel of claim 2, wherein a width of the first touch structure layer in a cross-sectional view perpendicular to a substrate direction is smaller than the preset width threshold;

or

4. The display panel of claim 1, wherein the adjustment layer comprises a third adjustment sublayer;

the color film layer comprises:

5. The display panel according to claim 4,

the second touch structure layer comprises a third touch structure sublayer arranged on the packaging layer and an opaque auxiliary film layer serving as the third adjusting sublayer and covering the third touch structure sublayer, and the reflectivity of the auxiliary film layer is smaller than or equal to a preset reflectivity threshold value;

or

6. The display panel of claim 1, wherein the adjustment layer comprises a fourth adjustment sublayer and a fifth adjustment sublayer;

the light emitting device layer includes:

a light emitting material of each sub-pixel; and

an opaque pixel defining layer surrounding the light emitting material and serving as the fourth adjustment sublayer, wherein a reflectivity of the opaque pixel defining layer is less than or equal to a preset reflectivity threshold;

the color film layer comprises:

7. The display panel according to claim 6,

the third touch structure layer comprises a fifth touch structure sublayer arranged on the packaging layer and an opaque auxiliary film layer serving as a fifth adjusting sublayer and covering the fifth touch structure sublayer, and the reflectivity of the auxiliary film layer is smaller than or equal to a preset reflectivity threshold value;

or

8. The display panel according to any one of claims 3, 5 and 7, wherein the auxiliary film layer is a conductive material or a non-conductive material;

and/or

The auxiliary film layer is one of a carbide film, a black polyimide resin material, graphite and a metal oxide material.

9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.

10. A method for manufacturing a display panel according to any one of claims 1 to 8, comprising sequentially stacking a driving circuit layer, a light emitting device layer, an encapsulation layer, and a color film layer on a substrate, wherein the light emitting device layer comprises a plurality of pixels arranged in an array, each pixel comprises a plurality of sub-pixels, and the method further comprises:

11. The method of manufacturing of claim 10, wherein the adjustment layer comprises a first adjustment sublayer and a second adjustment sublayer; the forming an adjustment layer on a substrate further comprises:

12. The method of manufacturing of claim 10, wherein the adjustment layer comprises a third adjustment sublayer; the forming an adjustment layer on a substrate further comprises:

13. The method of manufacturing of claim 10, wherein the adjustment layer comprises a fourth adjustment sublayer and a fifth adjustment sublayer; the forming an adjustment layer on a substrate further comprises: