CN113193155A

CN113193155A - Display panel, preparation method thereof and display device

Info

Publication number: CN113193155A
Application number: CN202110483572.XA
Authority: CN
Inventors: 孔超; 张如芹; 卿万梅; 张伟; 曹鹏
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: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-07-30

Abstract

The application discloses display panel and preparation method, display device thereof, wherein, a display panel includes: the display device comprises a substrate and a plurality of sub-pixels positioned on the substrate, wherein each sub-pixel is provided with an effective light emitting area; the color cast adjusting layer is positioned on one side of the sub-pixel, which is far away from the substrate, and a plurality of light-transmitting parts and light-shielding parts surrounding the periphery of the light-transmitting parts are arranged on the color cast adjusting layer; at least one of the light-transmitting parts at the orthographic projection of the substrate at least partially overlaps with the orthographic projection of the effective light-emitting area of the corresponding sub-pixel at the substrate. The display panel provided by the embodiment of the application controls the variation degree of R, G, B color brightness under different angles by arranging the color cast adjusting layer above the light-emitting function layer and adjusting the shape of the color cast adjusting layer, so that the color cast of the OLED device is better controlled, and the required color cast value and color cast direction are achieved.

Description

Display panel, preparation method thereof and display device

Technical Field

The application relates to the technical field of display, in particular to a display panel, a preparation method thereof and a display device.

Background

In recent years, active matrix organic electroluminescent devices (AMOLEDs) have the advantages of self-luminescence (without backlight), wide viewing angle, low power consumption, flexible (folding, curling) display, and the like, and are one of the most promising display technologies at present, and the application range of the technologies is gradually expanded. With the increasing popularization of OLED display products, the demands of consumers on color cast, efficiency, display effect, and the like are increasingly increased, and the difficulty in ensuring characteristics is continuously increased.

In the aspect of mobile communication terminal equipment, competition among various manufacturers of mobile phones is intense, and in order to improve sales performance, an AMOLED display screen is generally adopted in a high-end machine. A top-emitting OLED device can then be viewed structurally as a device in which the light-emitting source is sandwiched between an optical interference cavity formed by a highly reflective mirror and a transflective mirror. In an AMOLED display, each RGB sub-pixel can be considered as such a device arrangement. Although under the normal viewing angle, the white picture can be regulated and controlled by Gamma, and the brightness ratio of RGB is regulated and controlled by electric signals, thereby realizing the regulation and control of white balance.

Generally speaking, a top-emitting microcavity structure can effectively improve the efficiency of the device and reduce the power consumption of the panel. However, as the visual angle of human eyes increases, the structures of the respective optical interference cavities of the RGB sub-pixels are different, so that the luminance ratio of the RGB sub-pixels at a large visual angle changes with the increase of the visual angle, and further, the color coordinate of the white picture at the large visual angle deviates from the color coordinate at the normal visual angle, thereby causing the color cast at the large visual angle.

The phenomenon that the color shift changes along with the angle is limited by the microcavity structure of the top-emitting OLED device, is an inherent characteristic of the OLED device, and cannot be completely avoided in the prior art. Although the OLED technology has been developed rapidly in recent years, there is still much room for improvement in color shift adjustment.

In order to ensure the contrast of a screen in different external environments and reduce the reflection of ambient light, a Polarizer (POL) is generally used above a light-emitting encapsulation layer to ensure the display effect of the screen. The use of POL effectively increases the contrast of the OLED device under external strong light. However, the use of POL does not greatly affect the color shift of the device, and the color shift of the product is mainly determined by the light emitting device itself.

Disclosure of Invention

In view of the above-mentioned defects or shortcomings in the prior art, it is desirable to provide a display panel, a method for manufacturing the same, and a display device, which can better control the color shift of the OLED device to achieve the required color shift value and color shift direction.

In a first aspect, the present application provides a display panel comprising:

the display device comprises a substrate and a plurality of sub-pixels positioned on the substrate, wherein each sub-pixel is provided with an effective light emitting area;

the color cast adjusting layer is positioned on one side of the sub-pixel, which is far away from the substrate, and a plurality of light-transmitting parts and light-shielding parts surrounding the periphery of the light-transmitting parts are arranged on the color cast adjusting layer; at least one of the light-transmitting parts at the orthographic projection of the substrate at least partially overlaps with the orthographic projection of the effective light-emitting area of the corresponding sub-pixel at the substrate.

Preferably, one of the light-transmitting portions corresponds to a plurality of the sub-pixels, and an orthogonal projection of the one of the light-transmitting portions on the substrate overlaps with an orthogonal projection of the effective light-emitting areas of the plurality of sub-pixels on the substrate.

Preferably, one of the light-transmitting portions corresponds to one of the sub-pixels, and an orthogonal projection of the one of the light-transmitting portions on the substrate overlaps an orthogonal projection of the effective light-emitting area of the sub-pixel on the substrate.

Preferably, the effective light-emitting area of the sub-pixel includes a light-emitting element, the outer shape of the light-emitting element is a hexagon, and the lengths of two opposite sides of the hexagon are greater than the lengths of the other four sides.

Furthermore, the orthographic projection of the corresponding light-transmitting part above the light-emitting element on the substrate is a hexagon, and the distances from each side of the hexagon to the orthographic projection of the light-emitting element on the substrate are equal.

Preferably, the effective light emitting area of the sub-pixel comprises two light emitting elements arranged at intervals in a column direction, the two light emitting elements are arranged in mirror symmetry with respect to a straight line extending in a row direction, the outer contour of each light emitting element is in the shape of a pentagon, the pentagon comprises two right-angled sides extending in the column direction, and the row direction is substantially perpendicular to the column direction.

Preferably, an orthographic projection of the corresponding light-transmitting portion above the effective light-emitting area on the substrate is a hexagon, and distances from each side of the hexagon to the orthographic projection of the light-emitting element on the substrate are equal.

Further, the distance from the orthographic projection of the light-transmitting part on the substrate to the orthographic projection of the light-emitting element on the substrate is 0-N, wherein N is the distance from the outline of the light-emitting element to the boundary of the sub-pixel.

Further, the plurality of sub-pixels comprise red sub-pixels, green sub-pixels and blue sub-pixels which are arranged in an array, light transmitting parts arranged above the red sub-pixels are red light transmitting areas, green light transmitting areas and blue light transmitting areas, and the distance from the orthographic projection of the red light transmitting areas on the substrate to the orthographic projection of the red sub-pixels on the substrate, the distance from the orthographic projection of the green light transmitting areas on the substrate to the orthographic projection of the green sub-pixels on the substrate and the distance from the orthographic projection of the blue light transmitting areas on the substrate to the orthographic projection of the blue sub-pixels on the substrate are unequal.

Further, the outer contour of the light shielding portion is rectangular, and the plurality of light shielding portions are connected with each other.

Further, the outer contour shape of the light shielding portion is the same as that of the light transmitting portion, and the light shielding portion and the adjacent light shielding portion are arranged at intervals.

Further, the light shielding part is made of opaque or semitransparent light shielding materials, and the light transmitting part is made of light transmitting materials.

Further, the liquid crystal display panel further comprises a polarizer, and the color shift adjusting layer is arranged between the polarizer and the sub-pixels.

Further, the display device further comprises an encapsulation layer, wherein the color cast adjustment layer is arranged between the encapsulation layer and the sub-pixels, or the color cast adjustment layer is arranged on one side, far away from the substrate, of the encapsulation layer.

In a second aspect, the present application provides a method for manufacturing a display panel, for manufacturing the display panel as described in any one of the above, including:

forming a light shielding layer;

patterning the light-shielding layer to form the light-shielding portion and a light-transmitting portion;

forming the light-transmitting portion;

or,

forming a light-transmitting layer;

patterning the light-shielding layer to form the light-transmitting portion and a light-shielding portion;

the light shielding portion is formed.

In a third aspect, the present application provides a display device comprising a display panel as described in any of the above.

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

the display panel that this application embodiment provided, through set up the colour cast adjustment layer above luminous functional layer, the printing opacity portion of colour cast adjustment layer is used for seeing through light and beats on the sub-pixel of lower floor, and the shading portion is used for sheltering from the sub-pixel luminous scope to through the adjustment to its shape control under the different angles the degree of change of R, G, B three kinds of colour luminance, thereby the colour cast of better control OLED device reaches required colour cast value and colour cast direction.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

fig. 1 is a schematic structural diagram of a color shift adjusting layer according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of another color shift adjustment layer according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a color shift adjusting layer of comparative example 1 according to a first embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a contrast 2 color shift adjustment layer according to a first embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a contrast 3 color shift adjustment layer according to a first embodiment of the present disclosure;

FIG. 9 is a diagram of color shift traces at different angles obtained from each contrast experiment in the first embodiment of the present application;

FIG. 10 is a graph showing color shift values obtained in each comparative experiment in the first embodiment of the present application;

FIG. 11 is a schematic diagram of the different color L-decay obtained from each comparative experiment in the first embodiment of the present application;

FIG. 12 is a schematic diagram of a comparison of R color shift trajectory changes obtained from each comparison experiment in the first embodiment of the present application;

FIG. 13 is a schematic diagram showing a comparison of the variation of the G color shift locus obtained in each comparison experiment in the first embodiment of the present application;

FIG. 14 is a schematic diagram of a comparison of the variation of the B color shift trace obtained in each comparison experiment in the first embodiment of the present application;

FIG. 15 is a chart of color shift traces at different angles obtained from each comparative experiment in example two of the present application;

FIG. 16 is a graph showing color shift values obtained in each comparative experiment in example two of the present application;

FIG. 17 is a flow chart of a method of fabricating a display panel provided herein;

FIG. 18 is a flow chart of a method of making a color shift adjusting layer provided herein;

fig. 19 is a flow chart of another method of making a color shift adjusting layer provided herein.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

One of the main factors affecting the color shift of white light for OLED devices is the magnitude of the angular variation of the brightness of R, G, B three colors. Generally speaking, R, G, B has different degrees of brightness variation of three colors as the angle increases, and the difference of the brightness variation ratio of the three colors will result in different degrees of color variation under large viewing angle. If a better color cast is to be obtained, the trend of the brightness of different colors changing with angles needs to be managed.

The application is based on the technical idea that a color cast adjusting layer is added above a light-emitting function layer, and the change degree of R, G, B three color brightness at different angles is controlled by adjusting the shape of the light-emitting function layer, so that the color cast of an OLED device is better controlled, and the required color cast value and color cast direction are achieved.

In the present application, color cast means that the color of an image is different from the original hue, and the hue and saturation of a certain color in a general image are obviously different from the real image, and the difference is usually not desired. When color cast is performed, certain information can be highlighted or transmitted, and the position of the color cast is required to be known before the color cast is removed. In the embodiment of the present application, an exemplary method for obtaining a color shift direction includes:

acquiring an initial chromaticity coordinate value and a target chromaticity coordinate value of a display picture of a display panel;

comparing, within a chromaticity system, a position direction of the initial chromaticity coordinate value with respect to the target chromaticity coordinate value, the position direction representing the color shift direction.

JNCCD (just not possible Color difference) for reflecting the degree of Color shift, wherein a smaller value means a smaller Color shift and a more accurate Color display. The numerical value of 1 JNCCD is 0.004, wherein the formula of color cast calculation is as follows:

wherein the initial chromaticity coordinates (u ', v'), the target chromaticity coordinates (u₀＇，v₀＇)。

Referring to fig. 1-3 in detail, the present application provides a display panel, comprising:

a substrate 100 and a plurality of sub-pixels 3 located on the substrate 100, each of the sub-pixels 3 having an effective light emitting area;

the color shift adjusting layer 700 is positioned on one side of the sub-pixel 3 far away from the substrate 100, and the color shift adjusting layer 700 is provided with a plurality of light-transmitting portions 2 and a light-shielding portion 1 surrounding the periphery of the light-transmitting portions 2; an orthogonal projection of at least one of the light-transmitting portions 1 on the substrate 100 at least partially overlaps an orthogonal projection of the corresponding sub-pixel 3 on the substrate.

The color shift adjusting layer of the present application can be made of opaque or translucent materials. For example, a black polyimide resin material, or an inorganic filter layer composed of a metal or a metal compound may be selected. The shading part is arranged at the periphery of the pixel, and the position and the size of the shading part are adjusted to adjust the brightness of different colors along with the change of angles, so that the color cast of white is adjusted.

According to different requirements of different display screens on a color cast value and a color cast direction, the light-transmitting part and the light-shielding part can be set according to requirements, and the method comprises the following steps:

one of the light-transmitting portions 2 corresponds to a plurality of the sub-pixels 3, and an orthogonal projection of one of the light-transmitting portions 2 on the substrate overlaps with an orthogonal projection of the effective light-emitting areas of the plurality of sub-pixels on the substrate.

One of the light-transmitting portions 2 corresponds to one of the sub-pixels 3, and an orthogonal projection of one of the light-transmitting portions 2 on the substrate overlaps an orthogonal projection of the effective light-emitting area of the sub-pixel on the substrate.

The aspects of the embodiments of the present application are not limited to the above exemplary description, and although the light-transmitting portion corresponds to the sub-pixel position in the embodiments of the present application, in some embodiments, the light-transmitting portion may also correspond to one pixel unit. Based on the same principle, the following embodiments of the present application will be described with one light-transmitting portion corresponding to one sub-pixel.

In the embodiments of the present application, the effective light-emitting area of each sub-pixel corresponds to the light-emitting element of the sub-pixel, in some embodiments, one effective light-emitting area corresponds to one light-emitting element, and in some embodiments, one effective light-emitting area corresponds to an area formed by a plurality of light-emitting elements.

In the embodiment of the present application, although each pixel is described as including a red R sub-pixel, a green G sub-pixel, and a blue B sub-pixel, the present invention is not limited thereto. The colors of the sub-pixels may also be described as a first color, a second color, and a third color, which may also be cyan, magenta, and yellow. Further, the pixel may include a white sub-pixel.

In the embodiment of the present application, the arrangement of the sub-pixels in each pixel unit is not limited, and the arrangement of the sub-pixels may be a stripe arrangement, an island arrangement, a mosaic arrangement, or a delta arrangement.

It should be noted that, in the embodiment of the present invention, only the shape of each sub-pixel is a hexagon, optionally, the shape of each sub-pixel may not be a polygon, for example, the shape of the sub-pixel may be a circle or an ellipse, which is not limited in the embodiment of the present invention. Each sub-pixel has any one of a triangle, a quadrangle, a pentagon, a hexagon, and an octagon. In practical application, the display panel can be flexibly set according to practical situations such as application occasions of the display panel, requirements of display effects and the like. Illustratively, the sub-pixel comprises a light-emitting element, the outer contour shape of the light-emitting element is a hexagon, and the lengths of two opposite sides of the hexagon are greater than the lengths of the other four sides.

Correspondingly, the outline shape of the light-transmitting part above the sub-pixel is the same as that of the light-emitting element, the projection of the light-transmitting part on the substrate is a hexagon with six side lengths, and the distances from the side lengths to the light-emitting element are equal.

The hexagonal shape is a hexagonal shape in which two opposite sides of a regular hexagonal shape are extended by the same length, and the drawn hexagonal shape is composed of two drawn sides and four non-drawn sides.

In the embodiment of the present application, the structure of each light emitting element is not limited, and in some embodiments, the sub-pixel may be a single light emitting element of a single color, or may be a plurality of light emitting elements of the same color, the plurality of light emitting elements may be connected to each other, or the plurality of light emitting elements may be separated from each other. Two light emitting elements are exemplified below.

Illustratively, the effective light-emitting area of the sub-pixel comprises two light-emitting elements which are arranged at intervals in a column direction, the two light-emitting elements are arranged in mirror symmetry with respect to a straight line extending in a row direction, the outer contour of the light-emitting elements is in the shape of a pentagon, the pentagon comprises two right-angled sides extending in the column direction, and the row direction is approximately perpendicular to the column direction.

It should be noted that, in the embodiments of the present application, the effective light-emitting area of the sub-pixel is an area formed by two light-emitting elements in pentagons, and the pentagons are respectively located at two ends of a hexagon, so the effective light-emitting area of the present application can be regarded as a hexagon.

In the embodiment of the present application, the row direction and the column direction may be perpendicular to each other, or may be close to perpendicular, and the present application does not limit the specific directions of the row direction and the column direction.

Correspondingly, the light-transmitting part above the sub-pixel and the effective light-emitting area of the sub-pixel are in the same shape and are hexagons with six side lengths, and the projection side lengths of the side lengths on the substrate are equal to the distances from the orthographic projection of the light-emitting elements at the corresponding positions on the substrate.

It should be noted that, in the embodiment of the present application, only the shape of the light-transmitting portion is the same as the shape of the light-emitting region corresponding to the sub-pixel corresponding to the lower portion as an exemplary illustration, and in some other embodiments, the shape of the light-transmitting portion may be any one of a triangle, a quadrangle, a pentagon, a hexagon, or an octagon. In practical application, the color shift value and the color shift direction that can be achieved according to the needs of the display panel can be adjusted correspondingly, and the shape of the light-transmitting part is not limited in the present application.

The distance from the orthographic projection of the light-transmitting part on the substrate to the light-emitting element is 0-N, wherein N is the distance from the outline of the light-emitting element to the boundary of the sub-pixel. The boundary of the sub-pixel corresponds to the light emission range of the light emitting element of the sub-pixel on the color shift adjusting layer, the light emission range of each sub-pixel on each layer can be seen as a rectangle, and the light emission range of each sub-pixel borders the light emission range of the adjacent sub-pixel.

The plurality of sub-pixels comprise red sub-pixels, green sub-pixels and blue sub-pixels which are arranged in an array, light transmitting parts arranged above the sub-pixels are red light transmitting areas, green light transmitting areas and blue light transmitting areas, the distance from the orthographic projection of the red light transmitting areas on the substrate to the orthographic projection of the red sub-pixels on the substrate, the distance from the orthographic projection of the green light transmitting areas on the substrate to the orthographic projection of the green sub-pixels on the substrate and the distance from the orthographic projection of the blue light transmitting areas on the substrate to the orthographic projection of the blue sub-pixels on the substrate are unequal. In a specific setting, the color shift direction and the color shift value of the display panel can be determined respectively.

In the present embodiment, the inner shape of the light shielding portion corresponds to the shape of the light transmitting portion, the outer contour of the light shielding portion may be the same as the shape of the light transmitting portion, and in other embodiments, the outer contour may also be in other shapes.

In some embodiments of the present application, the outline of the light shielding portion is rectangular, and the light shielding portion is arranged without a space between adjacent light shielding portions, as shown in fig. 1.

In other embodiments of the present application, the outline shape of the light shielding portion is the same as the outline shape of the light transmitting portion, and the light shielding portion is arranged at an interval from the adjacent light shielding portion, as shown in fig. 2.

The light shielding part is made of opaque or semitransparent light shielding material, the light transmitting part is made of light transmitting material, and the color, transmittance or transmission waveband of the light transmitting part is determined according to the corresponding sub-pixel.

When specifically setting up, the position of colour cast adjustment layer can be adjusted according to specific needs:

in some embodiments, the display panel further includes a polarizer 800, and the color shift adjusting layer 700 is disposed between the polarizer 800 and the sub-pixel, as shown in fig. 3.

In some embodiments, the display panel further comprises an encapsulation layer 600, and the color shift adjusting layer 700 is disposed between the encapsulation layer 600 and the sub-pixels, as shown in fig. 4.

In some embodiments, the color shift adjusting layer 700 is disposed between the encapsulation layer 600 and the polarizer 800, as shown in FIG. 5.

Note that the color shift adjusting layer may be integrated into the COE, and it is necessary to match the transmittances of the CF material and POL. Preferably, the color shift adjusting layer is placed above TFE or above FMLOC, but the adjustment amplitude is larger, but not limited to this position. The color shift adjusting layer can also be arranged below the packaging layer, and in this case, the color shift adjusting layer is used for scenes with small difference between the color shift and a target value, fine adjustment and the like. The color shift adjusting layer is related to the pixel adjustment and pixel structure of different colors and OLED material system structure.

Example one

In this embodiment, the plurality of sub-pixels are R, G, and B sub-pixels arranged in an array, where the R and G sub-pixels are hexagonal light emitting elements, the B pixel is a sub-pixel formed by two B pentagonal light emitting elements, and the outer contour of the light transmissive region is hexagonal.

The distances between the projection of the outline of the light-transmitting region on the substrate in the color shift adjusting layer and the projection of the R, G, B sub-pixel on the substrate are RD, GD and BD respectively. The values of RD, GD, and BD may be adjusted as necessary, and may be 0 to N μm, where N is the distance from the outer contour of the light emitting element to the boundary of the sub-pixel. The projection of the outer contour of the light shielding region in the color cast adjusting layer on the light-emitting functional layer and the distance from R, G, B sub-pixels are NR, NG and NB respectively.

The three colors can be adjusted according to the requirements, wherein the colors are respectively corresponding to NR, NG, NB, RD, GD and BD.

In this example, we choose

Comparison 1: RD ═ x, GD ═ x, BD ═ a predetermined amount

Comparison 2: RD 6 μm, GD 4 μm, BD 6 μm

Comparison 3: RD 6 μm, GD 4 μm, BD is a total

Wherein, x represents the sub-pixel achromatic color shift adjustment film, or the upper part of the sub-pixel is only a light-transmitting part, or the upper part of the sub-pixel is not provided with a light-shielding part, and the sub-pixel has a structure similar to that of the prior device.

Specifically, fig. 6 shows a schematic diagram of comparative example 1, in which the color shift adjusting layer shown in the embodiment of the present application is not disposed on the upper portion of each sub-pixel, and the upper portion of each sub-pixel is a light-transmitting portion. Fig. 7 is a schematic diagram of a comparison 2, in which a color shift adjusting layer according to an embodiment of the present application is disposed on an upper portion of each sub-pixel. Fig. 8 shows a schematic diagram of comparison 3, in which the light-shielding portion and the light-transmitting portion shown in the embodiment of the present application are disposed on the upper portions of the R pixel and the G pixel, and only the light-transmitting portion is disposed on the upper portion of the B pixel.

Through a comparative experiment, a color cast trace as shown in fig. 9 is obtained, and it can be seen from the graph that the color cast trace is reddish from the original large viewing angle, and the color cast value is greatly reduced along with the increase of the angle. Fig. 10 is a color shift value obtained in each comparative experiment in the example of the present application, and it is also apparent from the graph that the color shift values in comparison 2 and comparison 3 are both small and excellent in display effect.

In the following figures, Split1 represents the results of comparative 1, Split2 represents the results of comparative 2, and Split3 represents the results of comparative 3.

The color shift values for each angle are shown in table 1. It can also be seen from table 1 that the color shift of the prior device (comparative 1) is relatively good at small angles, but the color shifts of comparative 2 and comparative 3 are better as the angle increases. From the above data, it was found that the color shift value and the color shift direction of the device can be adjusted by adjusting the size of the color shift improving layer.

TABLE 1

The principle of the color shift adjustment method according to the present invention will be described by taking the devices of comparative example 1 and comparative example 2 as examples. The main factors influencing the white light color coordinate include two items, namely the change degree of the RGB monochromatic color coordinate along with the angle and the RGB monochromatic L-decay degree, and the change of the two items is comprehensively reflected as the change of W (white) color cast and brightness. FIG. 11 shows the variation of the different colors L-decade of contrast 1 and contrast 2, and it can be seen that the L-decade of the device has changed after the addition of the color shift adjusting layer.

As can be seen from fig. 12 to 14, the color shift locus of a single color also changes after the color shift adjusting film is added.

By utilizing the comprehensive effect of the two points, the color cast and the color cast direction can be effectively improved by adjusting the size of the color cast adjusting film.

Example two

In the first embodiment, the color shift is optimized to a smaller value. In the second embodiment, the direction of color shift can be adjusted by the same method.

In this example, we choose

Comparison 1: RD ═ x, GD ═ x, BD ═ a predetermined amount

Comparison 4: RD ═ × μm, GD ═ 6 μm, and BD ═ × μm

Comparison No. 5: RD 4 μm, GD 2 μm, BD 4

In the following figures, Split1 represents the results of comparative 1, Split4 represents the results of comparative 4, and Split5 represents the results of comparative 5.

The color shift values for each angle are shown in table 2. It can also be seen from table 2 that the color shift of the prior device (comparative 1) is relatively good at small angles, but the color shifts of comparative 4 and comparative 5 are better as the angle increases. From the above data, it was found that the color shift value and the color shift direction of the device can be adjusted by adjusting the size of the color shift improving layer.

TABLE 2

Through comparative experiments, the color shift locus shown in fig. 15 is obtained in the example of the present application, and it can be seen from the figure that the color shift locus of comparative 1 (conventional device) becomes red with an increase in viewing angle, comparative 4 becomes green with an increase in viewing angle, and comparative 5 also becomes red with an increase in viewing angle, but the color shift becomes significantly smaller relative to comparative 1. The method can also control the color cast track, and meet the requirements of different customers on the color cast direction. Fig. 16 is the color shift values obtained in the comparative experiments in the examples of the present application, and it is also apparent from the figure that the color shift values of comparative 4 and comparative 5 are also somewhat reduced.

In a second aspect, referring to fig. 17, the present application provides a method for manufacturing a display panel, for manufacturing the display panel, including:

s1, providing a substrate 100, which in this embodiment may be a flexible PI substrate, or a rigid glass substrate, or a substrate with other structures.

And S2, forming a TFT device 200 on the substrate 100, wherein the TFT comprises functional layers such as a Buffer layer, a P-Si layer, a GI, a Gate layer, an ILD layer and an SD layer.

S3, forming a planarization layer 300 on the TFT device 100, the planarization layer being used to planarize a surface of the light emitting layer.

S4, forming an anode 400 on the planarization layer 300, wherein the structure may be ITO (10nm)/Ag (100nm)/ITO (10nm), or other anode structure with high reflectivity.

S5, a light emitting function layer 500 of a light emitting element of the OLED device is formed on the anode 400.

The preparation process of the OLED device is the same as that of the existing OLED structure. Optionally, the light-Emitting functional Layer includes an HIL (Hole injection Layer), an HTL (Hole Transport Layer), an HBL (Hole Blocking Layer), an ETL (Electron Transport Layer; Electron Transport Layer), an EIL (Electron injection Layer; Electron injection Layer), a CPL (trapping Layer; light extraction Layer) Layer, a B Prime (buffer Layer), a BEML (Emitting Layer; light-Emitting Layer), a G Prime, a gem, a R Prime, and a REML Layer, which are non-common layers; wherein the thickness range of each layer is approximately HIL 0-20 nm, HTL 70-150 nm, HBL 0-20 nm, ETL 15-50 nm, EIL 0-5 nm, CPL 50-100 nm, B Prime 0-15 nm, BEML 15-35 nm, G Prime 25-40 nm, GEML 25-40 nm, R Prime 50-100 nm and REML 35-55 nm.

S6, a Thin-Film Encapsulation TFE layer 600 (TFE) is formed over the CPL layer, and the main function of this layer is to prevent moisture and oxygen from penetrating into the device and affecting the lifetime of the device. The film packaging layer is an inorganic layer made of SiNx, SiNOx and the like by 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.

S7, a color shift adjusting layer 700 is formed on the TFE layer 600. As shown in fig. 18 to 19, the method specifically includes:

ST01, forming a light-shielding layer on the TFE layer;

ST02, patterning the light-shielding layer to form the light-shielding portion 1 and the light-transmitting portion 2;

ST03, forming the light transmission section 2.

Or,

ST10, forming a light-transmitting layer on the TFE layer;

ST20, patterning the light-transmitting layer to form the light-transmitting portion 2 and the light-shielding portion 1;

ST30, the light shielding portion 1 is formed.

In the present embodiment, the opaque or translucent material is selected as the material of the light shielding portion. For example, a black polyimide resin material, or an inorganic filter layer composed of a metal or a metal compound may be selected. The transparent part is filled with transparent OCA glue, and can be filled with required color, required transmittance and material of a transmission waveband according to requirements.

In the present application, in the field of display technology, the patterning process may include only a photolithography process, or may include a photolithography process and an etching step, and may also include other processes for forming a predetermined pattern, such as printing, inkjet printing, and the like; the photolithography process refers to a process of forming a pattern by using a photoresist, a mask plate, an exposure machine, and the like, including processes of film formation, exposure, development, and the like. The corresponding patterning process may be selected according to the structure formed in the present invention.

The method of forming the color shift adjusting layer may include forming the light-shielding layer and forming an opening for molding the light-transmitting portion by a patterning process, or may include forming the light-transmitting layer and forming an opening for molding the light-shielding portion by a patterning process.

The thickness of the color shift adjusting layer in the embodiment of the present application was 1.3 μm. In application, the color cast adjusting layer is not limited to the thickness, the thickness can be adjusted according to different use scenes, and the thickness range can be

The light shielding layer is made of an opaque material, is not limited to the opaque material in specific application, and can be a semitransparent material, and the transmittance of the material can be generally 0-90%, even higher. The color cast adjusting layer in the embodiment of the application is prepared by adopting the processes of solution spin coating and photoetching exposure. In practical application, the method is not limited to this method, and may be realized by using FMM mask vapor deposition or the like.

It should be noted that the magnitude of the adjustment of the color shift adjusting layer placed above TFE or above FMLOC in the embodiments of the present application is larger, but not limited to this position. The color shift adjusting layer can also be arranged below the packaging layer, and in this case, the color shift adjusting layer is used for scenes with small difference between the color shift and a target value, fine adjustment and the like. The color shift adjusting layer is related to the pixel adjustment and pixel structure of different colors and OLED material system structure.

The application of the display device is not particularly limited, and the display device can be any product or component with a display function, such as a television, a notebook computer, a tablet computer, a wearable display device, a mobile phone, a vehicle-mounted display, a navigation, an electronic book, a digital photo frame, an advertising lamp box and the like.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the 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 is therefore not to be construed as limiting the 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "disposed" and the like, as used herein, may refer to one element being directly attached to another element or one element being attached to another element through intervening elements. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the scope of the described embodiments. It will be appreciated by those skilled in the art that many variations and modifications may be made to the teachings of the invention, which fall within the scope of the invention as claimed.

Claims

1. A display panel, comprising:

2. The display panel according to claim 1, wherein one of the light-transmitting portions corresponds to a plurality of the sub-pixels, and an orthogonal projection of one of the light-transmitting portions on the substrate overlaps with an orthogonal projection of the effective light-emitting areas of the plurality of sub-pixels on the substrate.

3. The display panel according to claim 1, wherein one of the light-transmitting portions corresponds to one of the sub-pixels, and an orthogonal projection of one of the light-transmitting portions on the substrate overlaps an orthogonal projection of the effective light-emitting area of the sub-pixel on the substrate.

4. The display panel according to claim 1, wherein the effective light-emitting area of the sub-pixel includes a light-emitting element, an outer shape of the light-emitting element is a hexagon, and lengths of two opposite sides of the hexagon are greater than lengths of the other four sides.

5. The display panel according to claim 4, wherein an orthogonal projection of the corresponding light-transmitting portion above the light-emitting element on the substrate is a hexagon, and distances from each side of the hexagon to the orthogonal projection of the light-emitting element on the substrate are equal.

6. The display panel according to claim 1, wherein the effective light emitting area of the sub-pixel comprises two light emitting elements arranged at intervals in a column direction, the two light emitting elements are arranged in mirror symmetry with respect to a straight line extending in a row direction, an outer contour of the light emitting elements has a shape of a pentagon, the pentagon comprises two right-angled sides extending in the column direction, and the row direction is substantially perpendicular to the column direction.

7. The display panel according to claim 6, wherein an orthogonal projection of the corresponding light-transmitting portion above the effective light-emitting area on the substrate is a hexagon, and distances from sides of the hexagon to an orthogonal projection of the light-emitting element on the substrate are equal.

8. The display panel according to claim 5 or 7, wherein a distance from an orthographic projection of the light-transmitting portion on the substrate to an orthographic projection of the light-emitting element on the substrate is 0 to N, where N is a distance between an outer contour of the light-emitting element and a boundary of the sub-pixel.

9. The display panel according to claim 8, wherein the plurality of sub-pixels comprise red sub-pixels, green sub-pixels and blue sub-pixels arranged in an array, the light-transmitting portions disposed above the red sub-pixels are red light-transmitting regions, green light-transmitting regions and blue light-transmitting regions, and a distance from an orthographic projection of the red light-transmitting regions on the substrate to an orthographic projection of the red sub-pixels on the substrate, a distance from an orthographic projection of the green light-transmitting regions on the substrate to an orthographic projection of the green sub-pixels on the substrate, and a distance from an orthographic projection of the blue light-transmitting regions on the substrate to an orthographic projection of the blue sub-pixels on the substrate are unequal.

10. The display panel according to claim 1, wherein an outer contour of the light shielding portion is rectangular, and a plurality of the light shielding portions are connected to each other.

11. The display panel according to claim 1, wherein the light shielding portions have the same outer shape as the light transmitting portions, and the light shielding portions are arranged at intervals from adjacent light shielding portions.

12. The display panel according to claim 9 or 10, wherein the light shielding portion is an opaque or translucent light shielding material, and the light transmitting portion is a light transmitting material.

13. The display panel according to claim 1, further comprising a polarizing plate, wherein the color shift adjusting layer is provided between the polarizing plate and the sub-pixel.

14. The display panel according to claim 1, further comprising an encapsulation layer, wherein the color shift adjustment layer is provided between the encapsulation layer and the sub-pixel, or wherein the color shift adjustment layer is provided on a side of the encapsulation layer away from the substrate.

15. A method for manufacturing a display panel, for manufacturing the display panel according to any one of claims 1 to 14, comprising:

forming a light shielding layer;

forming the light-transmitting portion;

or,

forming a light-transmitting layer;

the light shielding portion is formed.

16. A display device comprising the display panel according to any one of claims 1 to 14.