Display panel and display device

Abstract

The invention relates to a display panel and a display device. The light-emitting functional layer comprises a plurality of light-emitting parts; the retaining walls are located between the adjacent light-emitting parts. The color film layer is arranged on the side, away from the array substrate, of the light-emitting function layer and comprises a plurality of color resistance blocks and black matrixes located between the adjacent color resistance blocks, the color resistance blocks correspond to the light-emitting parts and comprise the first color resistance block, the second color resistance block and the third color resistance block, and the black matrixes are located between the adjacent color resistance blocks. The black matrix comprises a first sub-part located between the first color resistance block and the second color resistance block, a second sub-part located between the first color resistance block and the third color resistance block, and a third sub-part located between the second color resistance block and the third color resistance block; the width of the first sub-part is larger than or equal to that of the second sub-part, the width of the second sub-part is larger than or equal to that of the third sub-part, and the width of the black matrix is smaller than or equal to that of the retaining wall; the influence of the black matrix on the light-emitting visual angle of the display panel can be effectively reduced, and the visual angle of the display panel is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] Organic Light-Emitting Diode (OLED) display panels are widely used in various fields due to their light weight, wide viewing angle, low power consumption, fast response speed, low temperature resistance, high luminous efficiency, and the ability to produce curved flexible displays.

[0003] In OLED display panels, Pol Less Panel (PLP) technology is often used to replace the function of the polarizer; specifically, a black matrix layer (BM) and a color filter layer (CF) are used to replace the function of the polarizer (Pol), and the color filter layer includes color resist blocks arranged corresponding to the pixel openings, and the black matrix layer is located between the color resist blocks, wherein the black matrix layer will block the light output of the light-emitting device, thereby reducing the wide-viewing angle light output of the display panel. Summary of the invention

[0004] The embodiments of the present application provide a display panel and a display device, which can reduce the influence of a black matrix on the light output viewing angle of a display panel and improve the viewing angle of the display panel.

[0005] An embodiment of the present application provides a display panel, comprising:

[0006] An array substrate;

[0007] A light-emitting functional layer is disposed on the array substrate, and the light-emitting functional layer includes a plurality of light-emitting parts;

[0008] A retaining wall is provided on the array substrate and is located between adjacent light emitting parts;

[0009] A color filter layer is arranged on a side of the light-emitting functional layer away from the array substrate, the color filter layer includes a plurality of color resist blocks and a black matrix located between adjacent color resist blocks, the plurality of color resist blocks are arranged corresponding to the plurality of light-emitting portions, the plurality of color resist blocks include a first color resist block, a second color resist block and a third color resist block, the black matrix includes a first sub-portion located between the first color resist block and the second color resist block, a second sub-portion located between the first color resist block and the third color resist block, and a third sub-portion located between the second color resist block and the third color resist block;

[0010] The width of the first sub-portion is greater than or equal to the width of the second sub-portion, the width of the second sub-portion is greater than or equal to the width of the third sub-portion, and the width of the black matrix is ​​less than or equal to the width of the retaining wall.

[0011] In an embodiment of the present application, the orthographic projection of the black matrix on the array substrate is located within the coverage range of the orthographic projection of the retaining wall on the array substrate.

[0012] In an embodiment of the present application, an edge of an orthographic projection of the black matrix on the array substrate is spaced apart from an edge of an orthographic projection of the retaining wall on the array substrate.

[0013] In one embodiment of the present application, the first color block is a green color block, the second color block is a blue color block, the third color block is a red color block, the width of the first sub-portion is greater than the width of the second sub-portion, and the width of the second sub-portion is greater than the width of the third sub-portion.

[0014] In one embodiment of the present application, the display panel also includes an opposing substrate arranged on the side of the light-emitting functional layer away from the array substrate, the color film layer is arranged on the surface of the opposing substrate close to the array substrate, and the black matrix is ​​in contact with the opposing substrate, and the color resist block is in contact with the opposing substrate.

[0015] In one embodiment of the present application, the display panel further includes an encapsulation layer disposed between the light-emitting functional layer and the color filter layer. At a preset viewing angle, the calculation formula of the shading width of the black matrix to the light-emitting portion adjacent thereto is:

[0016] w=h1TanA+h2TanB-(w1-w2) / 2;

[0017] A = arcsin[(n3sinC) / n1];

[0018] B = arcsin[(n3sinC) / n2];

[0019] Among them, w is the shading width, h1 is the distance from the light-emitting part to the color resist block, h2 is the thickness of the color resist block, w1 is the width of the retaining wall, w2 is the width of the black matrix, n1 is the refractive index of the encapsulation layer, n2 is the refractive index of the color resist block, n3 is the refractive index of air, A is the incident angle of the first light seen at the preset viewing angle when the encapsulation layer enters the color resist block, B is the incident angle of the first light when the color resist block enters the opposing substrate, and C is the preset viewing angle.

[0020] In one embodiment of the present application, the encapsulation layer includes an organic encapsulation layer, the distance between the light-emitting portion and the opposing substrate along the thickness direction of the display panel has a first value, the thickness of the organic encapsulation layer in the display area of ​​the display panel has a second value, the first value decreases as the second value decreases, and the value of the decrease in the first value is equal to the value of the decrease in the second value.

[0021] In an embodiment of the present application, a distance between the light emitting portion and the opposing substrate along a thickness direction of the display panel is less than or equal to 10 micrometers.

[0022] In one embodiment of the present application, the display panel also includes a touch electrode layer arranged between the light-emitting functional layer and the color filter layer, and the orthographic projection of the touch electrode layer on the array substrate is located within the coverage range of the orthographic projection of the black matrix on the array substrate.

[0023] According to the above-mentioned purpose of the present application, an embodiment of the present application further provides a display device, which includes the display panel.

[0024] The present application provides a display panel and a display device. By reducing the width of a black matrix and making the width of the black matrix smaller than the width of a retaining wall, the influence of the black matrix on the light output viewing angle of the display panel can be effectively reduced, thereby improving the viewing angle of the display panel. The width of the black matrix between different color-resistance blocks can be differentiated, thereby providing different degrees of light shielding for light-emitting parts corresponding to different color-resistance blocks, thereby improving the phenomenon of uneven display caused by different light-emitting colors of the light-emitting parts and different light output viewing angle attenuation.

[0025] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0027] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0028] Figure 1 A schematic diagram of a first structure of a display panel provided in an embodiment of the present application;

[0029] Figure 2A second structural schematic diagram of a display panel provided in an embodiment of the present application;

[0030] Figure 3 A third structural schematic diagram of a display panel provided in an embodiment of the present application;

[0031] Figure 4 A fourth structural schematic diagram of a display panel provided in an embodiment of the present application;

[0032] Figure 5 Schematic diagram of verification structures corresponding to different comparative examples and embodiments in the display panel provided in the embodiments of the present application;

[0033] Figure 6 A first set of viewing angle verification curves provided in the embodiment of the present application;

[0034] Figure 7 A second set of viewing angle verification curves provided in an embodiment of the present application;

[0035] Figure 8 The third set of viewing angle verification curves provided for the embodiment of the present application.

[0036] Description of reference numerals:

[0037] 11. array substrate; 111. substrate; 112. thin film transistor layer; 12. counter substrate;

[0038] 21. Light-emitting functional layer; 211. Light-emitting portion; 22. Retaining wall;

[0039] 30, color filter layer; 31, color block; 311, red color block; 312, green color block; 313, blue color block; 32, black matrix; 321, first sub-unit; 322, second sub-unit; 323, third sub-unit;

[0040] 40. encapsulation layer; 41. organic encapsulation layer;

[0041] 51. Touch electrode layer; 52. First insulating layer; 53. Second insulating layer. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0043] Please refer to Figure 1An embodiment of the present application provides a display panel, which includes an array substrate 11, a light-emitting functional layer 21, a retaining wall 22 and a color filter layer 30.

[0044] The light-emitting functional layer 21 is arranged on the array substrate 11, and the light-emitting functional layer 21 includes a plurality of light-emitting portions 211; the retaining wall 22 is arranged on the array substrate 11 and is located between adjacent light-emitting portions 211; the color filter layer 30 is arranged on a side of the light-emitting functional layer 21 away from the array substrate 11, and the color filter layer 30 includes a plurality of color resist blocks 31 and a black matrix 32 located between adjacent color resist blocks 31, the plurality of color resist blocks 31 are arranged corresponding to the plurality of light-emitting portions 211, the plurality of color resist blocks 31 include a first color resist block 311, a second color resist block 312 and a third color resist block 313, and the black matrix 32 includes a first sub-portion 321 located between the first color resist block 311 and the second color resist block 312, a second sub-portion 322 located between the first color resist block 311 and the third color resist block 313, and a third sub-portion 323 located between the second color resist block 312 and the third color resist block 313.

[0045] Further, the width of the first sub-portion 321 is greater than or equal to the width of the second sub-portion 322, the width of the second sub-portion 322 is greater than or equal to the width of the third sub-portion 323, and the width of the black matrix 32 is less than or equal to the width of the retaining wall 22.

[0046] During the implementation and application process, the embodiment of the present application can effectively reduce the influence of the black matrix 32 on the light output viewing angle of the display panel and improve the viewing angle of the display panel by reducing the width of the black matrix 32 and making the width of the black matrix 32 smaller than the width of the retaining wall 22; and can differentiate the width of the black matrix 32 between different color-resistance blocks, so as to have different degrees of shading for the light-emitting parts 211 corresponding to different color-resistance blocks, so as to improve the phenomenon of uneven display caused by different luminous colors of the light-emitting parts 211 and different attenuation of the light-emitting viewing angle.

[0047] Specifically, please combine Figure 1 as well as Figure 2In some embodiments, the display panel includes an array substrate 11 and an opposing substrate 12, a light-emitting functional layer 21, a retaining wall 22, the opposing substrate 12 and a color film layer 30, wherein the light-emitting functional layer 21 and the retaining wall 22 are arranged on the array substrate 11, and the color film layer 30 is arranged on the opposing substrate 12; specifically, the light-emitting functional layer 21 and the retaining wall 22 are arranged on a side of the array substrate 11 close to the opposing substrate 12, the opposing substrate 12 is arranged on a side of the light-emitting functional layer 21 away from the array substrate 11, and the color film layer 30 is arranged on a side of the opposing substrate 12 close to the array substrate 11 or away from the array substrate 11.

[0048] It can be understood that the light-emitting functional layer 21 and the retaining wall 22 are prepared on the array substrate 11 during the manufacturing process, and the color film layer 30 is prepared on the opposing substrate 12 during the manufacturing process, and then the array substrate 11 and the opposing substrate 12 are assembled; thereby, the color film layer 30 can be prevented from causing damage to the light-emitting functional layer 21 during the exposure and development process, and there is no need to increase the thickness of the film layer between the color film layer 30 and the light-emitting functional layer 21 to reduce the damage of the color film layer 30 to the light-emitting functional layer 21 during the manufacturing process; therefore, the thickness of the film layer between the color film layer 30 and the light-emitting functional layer 21 can be reduced, and then the distance between the color film layer 30 and the light-emitting functional layer 21 can be reduced, and the black matrix 32 can be reduced from blocking the wide-angle light output of the light-emitting portion 211, thereby improving the viewing angle of the display panel.

[0049] In some embodiments, the array substrate 11 includes a substrate 111 and a thin film transistor layer 112 disposed on the substrate 111 , and the light-emitting functional layer 21 is disposed on a side of the thin film transistor layer 112 away from the substrate 111 .

[0050] In some embodiments, the substrate 111 may be a hard substrate, such as a glass substrate; or, the substrate 111 may be a flexible substrate, such as a substrate formed of polyimide. When the substrate is a flexible substrate, the substrate 111 may be formed of multiple sub-substrates made of the same material, such as polyimide, and adjacent sub-substrates are bonded by bonding sub-layers.

[0051] In some embodiments, the thin film transistor layer 112 includes a thin film transistor, which includes a semiconductor located on the substrate, and the semiconductor can be formed of polysilicon or a metal oxide (such as indium gallium zinc oxide). The semiconductor is divided into a channel region and a source region and a drain region formed on both sides of the channel region. The thin film transistor layer 112 also includes a first gate insulating layer, which covers the semiconductor. The thin film transistor also includes a first gate formed on the first gate insulating layer, and the first gate overlaps with the channel region. The first gate can be formed as a plurality of layers or a single layer including a low resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material with high corrosion resistance. The thin film transistor layer 112 also includes a second gate insulating layer, and the second gate insulating layer covers the first gate. The thin film transistor also includes a second gate located on the second gate insulating layer, and the second gate overlaps with the first gate. The second gate can be formed as a plurality of layers or a single layer including a low resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material with high corrosion resistance. The thin film transistor layer 112 further includes a first interlayer insulating layer formed on the second gate, wherein the first interlayer insulating layer, the first gate insulating layer, and the second gate insulating layer include a source contact hole and a drain contact hole, and the source region and the drain region are exposed through the source contact hole and the drain contact hole, respectively.

[0052] The thin film transistor also includes a source and a drain arranged in the same layer, the source and the drain are both formed on the first interlayer insulating layer, the source is connected to the source region through the source contact hole, and the drain is connected to the drain region through the drain contact hole. The source and the drain may be multiple layers or a single layer formed of a low resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material with high corrosion resistance. For example, the source and the drain may be a triple layer of Ti / Cu / Ti, Ti / Ag / Ti, Ti / Al / Ti or Mo / Al / Mo or other single or multilayer structures.

[0053] In some embodiments, the thin film transistor layer 112 further includes a planar layer located on a side of the first interlayer insulating layer away from the substrate 111 , and the planar layer covers the source electrode and the drain electrode.

[0054] In some embodiments, the display panel further includes a plurality of anodes (not shown in the figure) disposed on the planar layer, and the anodes are connected to the source electrode or the drain electrode.

[0055] In some embodiments, the display panel also includes a pixel definition layer disposed on the flat layer, and a plurality of pixel openings and a retaining wall 22 surrounding each of the pixel openings are formed in the pixel definition layer. The plurality of pixel openings can be arranged one-to-one corresponding to the plurality of anodes, and each of the pixel openings exposes the upper surface of the corresponding anode.

[0056] Furthermore, the light-emitting functional layer 21 includes a plurality of light-emitting portions 211 , and the plurality of light-emitting portions 211 are arranged corresponding to a plurality of pixel openings, and each of the light-emitting portions 211 is arranged in a corresponding pixel opening and located on a corresponding anode.

[0057] In some embodiments, the plurality of light emitting portions 211 and the plurality of pixel openings are arranged in a one-to-one correspondence.

[0058] In some embodiments, the display panel further includes a cathode layer (not shown) disposed on a side of the light-emitting functional layer 21 away from the array substrate 11 , and the cathode layer covers the plurality of light-emitting portions 211 and the retaining walls 22 .

[0059] In some embodiments, the opposing substrate 12 is arranged on a side of the light-emitting functional layer 21 away from the array substrate 11, the color filter layer 30 is arranged on the opposing substrate 12, and the color filter layer 30 is located on the surface of the opposing substrate 12 on a side close to the array substrate 11; the color filter layer 30 includes a plurality of color resist blocks 31 and a black matrix 32 located between adjacent color resist blocks 31, and the black matrix 32 is in contact with the opposing substrate 12, and the color resist blocks 31 are in contact with the opposing substrate 12.

[0060] In other embodiments of the present application, the color filter layer 30 may also be arranged on the surface of the opposing substrate 12 away from the array substrate 11, and the embodiment of the present application is described by taking the color filter layer 30 being arranged on the opposing substrate 12 and the color filter layer 30 being located on the surface of the opposing substrate 12 close to the array substrate 11 as an example.

[0061] In some embodiments, the orthographic projection of the black matrix 32 on the array substrate 11 is located within the coverage range of the orthographic projection of the retaining wall 22 on the array substrate 11. Therefore, the embodiment of the present application reduces the width of the black matrix 32 and makes the width of the black matrix 32 smaller than the width of the retaining wall 22, thereby effectively reducing the influence of the black matrix 32 on the light emitting viewing angle of the display panel and improving the viewing angle of the display panel.

[0062] In some embodiments, the edge of the orthographic projection of the black matrix 32 on the array substrate 11 is spaced apart from the edge of the orthographic projection of the retaining wall 22 on the array substrate 11, that is, the width of the black matrix 32 is smaller than the width of the retaining wall 22, thereby reducing the probability that the light at the edge of each light-emitting portion 211 is blocked by the black matrix 32, and further improving the light output angle range of the light-emitting portion 211.

[0063] In some embodiments, the width of the black matrix 32 is greater than or equal to 4.5 microns and less than 20 microns. Furthermore, the width of the black matrix 32 is greater than or equal to 6 and less than or equal to 12 microns. For example, the width of the black matrix 32 can be 6 microns, 7 microns, 8 microns, 9 microns, 10 microns, 11 microns or 12 microns.

[0064] In some embodiments, the display panel also includes a touch electrode layer 51, a first insulating layer 52 and a second insulating layer 53 arranged between the light-emitting functional layer 21 and the color film layer 30, the first insulating layer 52 is located between the touch electrode layer 51 and the light-emitting functional layer 21, and the second insulating layer 53 is located between the touch electrode layer 51 and the color film layer 30; in order to block the reflected light of the touch electrode layer 51, the orthographic projection of the touch electrode layer 51 on the array substrate 11 is located within the coverage range of the orthographic projection of the black matrix 32 on the array substrate 11, that is, the width of the black matrix 32 in the embodiment of the present application is reduced, and then the width of the electrode in the touch electrode layer 51 also needs to be reduced so as to be located within the coverage range of the black matrix 32.

[0065] In other embodiments of the present application, the material of the touch electrode layer 51 may include a transparent conductive material, and the orthographic projection of the touch electrode layer 51 on the array substrate 11 may not be located within the coverage range of the orthographic projection of the black matrix 32 on the array substrate 11, which may also affect the light output and display effects.

[0066] In one embodiment of the present application, please refer to Figure 1 The plurality of color blocks 31 include a first color block 311, a second color block 312 and a third color block 313, and the black matrix 32 includes a first sub-portion 321 located between the first color block 311 and the second color block 312, a second sub-portion 322 located between the first color block 311 and the third color block 313, and a third sub-portion 323 located between the second color block 312 and the third color block 313.

[0067] In some embodiments, the first color block 311 is a green color block, the second color block 312 is a blue color block, and the third color block 313 is a red color block.

[0068] The width of the first sub-portion 321 is equal to the width of the second sub-portion 322 , and the width of the first sub-portion 321 is equal to the width of the third sub-portion 323 . That is, the width of each part of the black matrix 32 is the same, which can simplify the process and reduce the difficulty of the process.

[0069] In another embodiment of the present application, please refer to Figure 3 The plurality of color blocks 31 include a first color block 311, a second color block 312 and a third color block 313, and the black matrix 32 includes a first sub-portion 321 located between the first color block 311 and the second color block 312, a second sub-portion 322 located between the first color block 311 and the third color block 313, and a third sub-portion 323 located between the second color block 312 and the third color block 313.

[0070] In some embodiments, the first color block 311 is a green color block, the second color block 312 is a blue color block, and the third color block 313 is a red color block; wherein the width of the first sub-portion 321 is greater than the width of the second sub-portion 322, and the width of the second sub-portion 322 is greater than the width of the third sub-portion 323; verified by the present application, the light output viewing angle attenuation between the red color block and the blue color block is the most serious, while the light output viewing angle attenuation between the red color block and the green color block is second, and the light output viewing angle attenuation between the green color block and the blue color block is the smallest. Therefore, in the embodiment of the present application, according to the different light output viewing angle attenuation degrees between the color blocks of different colors, the black color blocks located between the color blocks of different colors are The width of the color matrix 32 is set differently, so that the black matrix 32 has the smallest shielding effect on the light output viewing angle between the second color block 312 and the third color block 313, and the black matrix 32 has a greater shielding effect on the light output viewing angle between the first color block 311 and the third color block 313 than the black matrix 32 has on the light output viewing angle between the second color block 312 and the third color block 313, and the black matrix 32 has the largest shielding effect on the light output viewing angle between the first color block 311 and the second color block 312, thereby making the light output viewing angles between the color blocks 31 of different colors tend to be uniform, thereby improving the display uniformity of the display panel and the display effect of the display panel.

[0071] In some embodiments, the display panel includes a red pixel column, a green pixel column, and a blue pixel column arranged alternately in sequence along a first direction, and the red pixel column includes a plurality of the third color blocks 313 arranged along a second direction, the green pixel column includes a plurality of the first color blocks 311 arranged along the second direction, and the blue pixel column includes a plurality of the second color blocks 312 arranged along the second direction; therefore, the first sub-portion 321 can be located between the green pixel column and the blue pixel column, the second sub-portion 322 can be located between the red pixel column and the green pixel column, and the third sub-portion 323 can be located between the red pixel column and the blue pixel column.

[0072] It should be noted that, since the color filter layer 30 is arranged on the opposing substrate 12 in the embodiment of the present application, compared with directly arranging the color filter layer 30 on the light-emitting functional layer 21, the color filter layer 30 can be prevented from causing damage to the light-emitting functional layer 21 during the exposure and development process, and there is no need to increase the thickness of the film layer between the color filter layer 30 and the light-emitting functional layer 21 to reduce the damage of the light-emitting functional layer 21 caused by the process of the color filter layer 30. Therefore, the thickness of the film layer between the color filter layer 30 and the light-emitting functional layer 21 can be reduced, and then the distance between the color filter layer 30 and the light-emitting functional layer 21 can be reduced, which can further reduce the black matrix 32 from blocking the wide-angle light output of the light-emitting portion 211, and further improve the viewing angle of the display panel.

[0073] In some embodiments, the display panel further includes an encapsulation layer 40 disposed between the light-emitting functional layer 21 and the color filter layer 30 , and the encapsulation layer 40 may be located between the second insulating layer 53 and the color filter layer 30 ; wherein the encapsulation layer 40 includes an organic encapsulation layer 41 .

[0074] In other embodiments of the present application, the encapsulation layer 40 may further include an inorganic encapsulation layer (not shown in the figure), and the inorganic encapsulation layer may be located between the light-emitting functional layer 21 and the organic encapsulation layer 41, or the inorganic encapsulation layer may be located between the color film layer 30 and the organic encapsulation layer 41, or the inorganic encapsulation layer may be located between the light-emitting functional layer 21 and the organic encapsulation layer 41, and between the color film layer 30 and the organic encapsulation layer 41.

[0075] Please refer to Figure 4 , relative to Figure 1For the display panel shown, in the embodiment of the present application, the thickness of the film layer between the color filter layer 30 and the light-emitting functional layer 21 can be reduced, and the organic encapsulation layer 41 has the largest thickness among the film layers between the color filter layer 30 and the light-emitting functional layer 21, and then the thickness of the organic encapsulation layer 41 can be reduced to reduce the distance between the black matrix 32 and the light-emitting portion 211, and then the shielding effect of the black matrix 32 on the light-emitting viewing angle of the light-emitting portion 211 can be reduced; in some embodiments, the distance H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel has a first value, and the thickness H2 of the organic encapsulation layer 41 in the display area of ​​the display panel has a second value, and the ratio of the second value to the first value is less than or equal to 0.8, for example, the ratio of the second value to the first value can be 0.8, 0.79, 0.78, 0.77, 0.76 or 0.75. The embodiment of the present application can achieve the purpose of controlling the spacing H1 by controlling the thickness H2. On the one hand, the organic encapsulation layer 41 can play a role in buffering stress and flattening. On the other hand, the thickness of the organic encapsulation layer 41 is reduced to improve the light output viewing angle.

[0076] In some embodiments, the distance H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is less than or equal to 10 microns. For example, the distance H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel may be 10 microns, 9 microns, 8 microns, 7 microns or 6 microns.

[0077] In some embodiments, the first value decreases as the second value decreases, and the amount by which the first value decreases is equal to the amount by which the second value decreases. In the embodiment of the present application, the reduction in the spacing H1 is achieved by reducing the thickness H2.

[0078] In some embodiments, please refer to Figure 1 , at the preset viewing angle C, the first light 2110 is the light emitted from the edge of the black matrix 32, and the light on the right side of the first light 2110 will be blocked by the black matrix 32; wherein, it is known that n1sinA=n2sinB=n3sinC, n1 is the refractive index of the encapsulation layer 40, n2 is the refractive index of the color resist block 31, n3 is the refractive index of air, A is the incident angle of the first light 2110 at the preset viewing angle C when the encapsulation layer 40 enters the color resist block 31, and B is the incident angle of the first light 2110 at the color resist block 31 when it enters the opposing substrate 12.

[0079] In some embodiments, when the organic encapsulation layer 41 covers a surface of the color resist block 31 away from the counter substrate 12 , n1 may be a refractive index of the organic encapsulation layer 41 .

[0080] Furthermore, under the preset viewing angle C, the calculation formula of the shading width of the black matrix 32 to the adjacent light emitting portion 211 is:

[0081] w=w5-w6;

[0082] Wherein, w5=w3+w4, w6=(w1−w2) / 2, w1 is the width of the retaining wall 22 , and w2 is the width of the black matrix 32 .

[0083] Furthermore, w3=h1TanA, w4=h2TanB, wherein h1 is the distance between the light emitting portion 211 and the color resist block 31 , and h2 is the thickness of the color resist block 31 .

[0084] Therefore, the calculation formula for the shading width w of the black matrix 32 to the adjacent light emitting portion 211 under the preset viewing angle C is obtained as follows:

[0085] w=h1TanA+h2TanB-(w1-w2) / 2;

[0086] A = arcsin[(n3sinC) / n1];

[0087] B = arcsin[(n3sinC) / n2];

[0088] Among them, n1, n2, n3, C, w1 and w2 can all be known conditions, so the shading width w can be obtained.

[0089] It can be understood that, from the calculation formula of the shading width w, it can be seen that as the spacing h1 from the light-emitting portion 211 to the color block 31 and the thickness h2 of the color block 31 decrease, the shading width w will also decrease, and the spacing H1 is equal to the sum of the spacing h1 and the thickness h2. Therefore, the embodiment of the present application can effectively reduce the shading width w of the black matrix 32 to the adjacent light-emitting portion 211 by reducing the spacing H1, so as to improve the viewing angle range of the display panel.

[0090] In some embodiments, a thickness H2 of the organic encapsulation layer 41 in the display area of ​​the display panel may be equal to a distance h1 from the light emitting portion 211 to the color resist block 31 .

[0091] Furthermore, please combine Figure 1 as well as Figure 5The embodiments of the present application provide a first group of viewing angle verification embodiments, a second group of viewing angle verification embodiments and a third group of viewing angle verification embodiments to verify the changes in the light output viewing angle of the display panel caused by different settings of the color filter layer 30.

[0092] Specifically, the first group of viewing angle verification embodiments includes Comparative Example 1, Comparative Example 2, Comparative Example 3, Example 1, Example 2 and Example 3.

[0093] In Comparative Example 1, the structure of the color filter layer 30 in the display panel is as follows: Figure 5 As shown in area A, the opposing substrate 12 is not provided with the color resist block 31 and the black matrix 32, the spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 9 microns, the thickness of the color resist block 31 is 2 microns, and the thickness H2 of the organic encapsulation layer 41 is 7 microns.

[0094] In Comparative Example 2, the structure of the color filter layer 30 in the display panel is as follows: Figure 5 As shown in the B area, the opposing substrate 12 is provided with the color resist block 31, and the black matrix 32 is not provided. The spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 9 microns, the thickness of the color resist block 31 is 2 microns, and the thickness H2 of the organic encapsulation layer 41 is 7 microns.

[0095] In Comparative Example 3, the structure of the color filter layer 30 in the display panel is as follows: Figure 5 As shown in the middle C area, the opposing substrate 12 is provided with the color resist block 31 and the black matrix 32, the spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 9 microns, the thickness of the color resist block 31 is 2 microns, the thickness H2 of the organic encapsulation layer 41 is 7 microns, and the width of the black matrix 32 is 20 microns.

[0096] In Example 1, the structure of the color filter layer 30 in the display panel is as follows: Figure 5 As shown in the D area, the opposing substrate 12 is provided with the color resist block 31 and the black matrix 32, the spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 9 microns, the thickness of the color resist block 31 is 2 microns, the thickness H2 of the organic encapsulation layer 41 is 7 microns, and the width of the black matrix 32 is 13 microns.

[0097] In Embodiment 2, the structure of the color filter layer 30 in the display panel is as follows: Figure 5As shown in the D area, the opposing substrate 12 is provided with the color resist block 31 and the black matrix 32, the spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 9 microns, the thickness of the color resist block 31 is 2 microns, the thickness H2 of the organic encapsulation layer 41 is 7 microns, and the width of the black matrix 32 is 9 microns.

[0098] In Embodiment 3, the structure of the color filter layer 30 in the display panel is as follows: Figure 5 As shown in the D area, the opposing substrate 12 is provided with the color resist block 31 and the black matrix 32, the spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 9 microns, the thickness of the color resist block 31 is 2 microns, the thickness H2 of the organic encapsulation layer 41 is 7 microns, and the width of the black matrix 32 is 5 microns.

[0099] The second group of viewing angle verification embodiments includes Comparative Example 1, Comparative Example 2, Comparative Example 4, Example 4, Example 5 and Example 6.

[0100] In Comparative Example 1, the structure of the color filter layer 30 in the display panel is as follows: Figure 5 As shown in area A, the opposing substrate 12 is not provided with the color resist block 31 and the black matrix 32, the spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 9 microns, the thickness of the color resist block 31 is 2 microns, and the thickness H2 of the organic encapsulation layer 41 is 7 microns.

[0101] In Comparative Example 2, the structure of the color filter layer 30 in the display panel is as follows: Figure 5 As shown in the B area, the opposing substrate 12 is provided with the color resist block 31, and the black matrix 32 is not provided. The spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 9 microns, the thickness of the color resist block 31 is 2 microns, and the thickness H2 of the organic encapsulation layer 41 is 7 microns.

[0102] In Comparative Example 4, the structure of the color filter layer 30 in the display panel is as follows: Figure 5 As shown in the middle C area, the opposing substrate 12 is provided with the color resist block 31 and the black matrix 32, the spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 10 microns, the thickness of the color resist block 31 is 2 microns, the thickness H2 of the organic encapsulation layer 41 is 8 microns, and the width of the black matrix 32 is 20 microns.

[0103] In Embodiment 4, the structure of the color filter layer 30 in the display panel is as follows: Figure 5As shown in the D area, the opposing substrate 12 is provided with the color resist block 31 and the black matrix 32, the spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 10 microns, the thickness of the color resist block 31 is 2 microns, the thickness of the organic encapsulation layer 41 is 8 microns, and the width of the black matrix 32 is 13 microns.

[0104] In Embodiment 5, the structure of the color filter layer 30 in the display panel is as follows: Figure 5 As shown in the D area, the opposing substrate 12 is provided with the color resist block 31 and the black matrix 32, the spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 10 microns, the thickness of the color resist block 31 is 2 microns, the thickness H2 of the organic encapsulation layer 41 is 8 microns, and the width of the black matrix 32 is 9 microns.

[0105] In Embodiment 6, the structure of the color filter layer 30 in the display panel is as follows: Figure 5 As shown in the D area, the opposing substrate 12 is provided with the color resist block 31 and the black matrix 32, the spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 10 microns, the thickness of the color resist block 31 is 2 microns, the thickness H2 of the organic encapsulation layer 41 is 8 microns, and the width of the black matrix 32 is 5 microns.

[0106] The third group of viewing angle verification embodiments includes Comparative Example 1, Comparative Example 2, Comparative Example 5, Example 7, Example 8 and Example 9.

[0107] In Comparative Example 1, the structure of the color filter layer 30 in the display panel is as follows: Figure 5 As shown in area A, the opposing substrate 12 is not provided with the color resist block 31 and the black matrix 32, the spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 9 microns, the thickness of the color resist block 31 is 2 microns, and the thickness H2 of the organic encapsulation layer 41 is 7 microns.

[0108] In Comparative Example 2, the structure of the color filter layer 30 in the display panel is as follows: Figure 5 As shown in the B area, the opposing substrate 12 is provided with the color resist block 31, and the black matrix 32 is not provided. The spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 9 microns, the thickness of the color resist block 31 is 2 microns, and the thickness H2 of the organic encapsulation layer 41 is 7 microns.

[0109] In Comparative Example 5, the structure of the color filter layer 30 in the display panel is as follows: Figure 5As shown in the middle C area, the opposing substrate 12 is provided with the color resist block 31 and the black matrix 32, the spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 11 microns, the thickness of the color resist block 31 is 2 microns, the thickness H2 of the organic encapsulation layer 41 is 9 microns, and the width of the black matrix 32 is 20 microns.

[0110] In Embodiment 7, the structure of the color filter layer 30 in the display panel is as follows: Figure 5 As shown in the D area, the opposing substrate 12 is provided with the color resist block 31 and the black matrix 32, the spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 11 microns, the thickness of the color resist block 31 is 2 microns, the thickness H2 of the organic encapsulation layer 41 is 9 microns, and the width of the black matrix 32 is 13 microns.

[0111] In Example 8, the structure of the color filter layer 30 in the display panel is as follows: Figure 5 As shown in the D area, the opposing substrate 12 is provided with the color resist block 31 and the black matrix 32, the spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 11 microns, the thickness of the color resist block 31 is 2 microns, the thickness H2 of the organic encapsulation layer 41 is 9 microns, and the width of the black matrix 32 is 9 microns.

[0112] In Embodiment 9, the structure of the color filter layer 30 in the display panel is as follows: Figure 5 As shown in the D area, the opposing substrate 12 is provided with the color resist block 31 and the black matrix 32, the spacing H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel is 11 microns, the thickness of the color resist block 31 is 2 microns, the thickness H2 of the organic encapsulation layer 41 is 9 microns, and the width of the black matrix 32 is 5 microns.

[0113] Based on the above, after verification, the data shown in Table 1 and Figure 6 , Figure 7 as well as Figure 8 The brightness-viewing angle curve is shown in FIG. Figure 6 This is a brightness-viewing angle curve diagram obtained from the first set of viewing angle verification embodiments, Figure 7 This is a brightness-viewing angle curve diagram obtained by the second group of viewing angle verification embodiments, Figure 8 This is a brightness-viewing angle curve diagram obtained for the third group of viewing angle verification embodiments.

[0114] Table 1

[0115]

[0116] From the above Table 1 and Figures 6 to 8 As shown, as the width of the black matrix 32 decreases, the brightness of the display panel at the same viewing angle will increase, and as the distance H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel decreases, the brightness of the display panel at the same viewing angle will increase, which means that in the embodiment of the present application, by reducing the width of the black matrix 32 and reducing the distance H1 between the light-emitting portion 211 and the opposing substrate 12 along the thickness direction of the display panel, the shielding effect of the black matrix 32 on the light-emitting viewing angle of the light-emitting portion 211 can be effectively reduced, the light-emitting viewing angle of the light-emitting portion 211 can be effectively improved, and the viewing angle of the display panel can be improved.

[0117] As mentioned above, the embodiment of the present application reduces the width of the black matrix 32 and makes the width of the black matrix 32 smaller than the width of the retaining wall 22, thereby effectively reducing the influence of the black matrix 32 on the light output viewing angle of the display panel and improving the viewing angle of the display panel; in addition, in the embodiment of the present application, the color filter layer 30 is arranged on the opposing substrate 12. Compared with directly arranging the color filter layer 30 on the light-emitting functional layer 21, it can avoid that the color filter layer 30 causes damage to the light-emitting functional layer 21 during the exposure and development process, and there is no need to increase the thickness of the film layer between the color filter layer 30 and the light-emitting functional layer 21 to reduce the damage of the color filter layer 30 to the light-emitting functional layer 21 during the manufacturing process. Therefore, the thickness of the film layer between the color filter layer 30 and the light-emitting functional layer 21 can be reduced, and then the distance between the color filter layer 30 and the light-emitting functional layer 21 can be reduced, which can further reduce the black matrix 32 from blocking the wide-angle light output of the light-emitting portion 211, and further improve the viewing angle of the display panel.

[0118] In addition, an embodiment of the present application provides a display device, which includes the display panel described in the above embodiment.

[0119] It can be understood that, since the display device has the display panel described in the above embodiment, the display device has the same beneficial effects as the display panel, which will not be described in detail herein.

[0120] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood 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 features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0121] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0122] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0123] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A display panel, characterized in that: include: An array substrate; A light-emitting functional layer is disposed on the array substrate, and the light-emitting functional layer includes a plurality of light-emitting parts; A retaining wall is provided on the array substrate and is located between adjacent light emitting parts; A color filter layer is arranged on a side of the light-emitting functional layer away from the array substrate, the color filter layer includes a plurality of color resist blocks and a black matrix located between adjacent color resist blocks, the plurality of color resist blocks are arranged corresponding to the plurality of light-emitting portions, the plurality of color resist blocks include a first color resist block, a second color resist block and a third color resist block, the black matrix includes a first sub-portion located between the first color resist block and the second color resist block, a second sub-portion located between the first color resist block and the third color resist block, and a third sub-portion located between the second color resist block and the third color resist block; The width of the first sub-portion is greater than or equal to the width of the second sub-portion, the width of the second sub-portion is greater than or equal to the width of the third sub-portion, and the width of the black matrix is ​​less than or equal to the width of the retaining wall.

2. The display panel according to claim 1, characterized in that: The orthographic projection of the black matrix on the array substrate is located within the coverage range of the orthographic projection of the blocking wall on the array substrate.

3. The display panel according to claim 2, characterized in that: The edge of the orthographic projection of the black matrix on the array substrate is spaced apart from the edge of the orthographic projection of the blocking wall on the array substrate.

4. The display panel according to claim 1, characterized in that: The first color block is a green color block, the second color block is a blue color block, the third color block is a red color block, the width of the first sub-portion is greater than the width of the second sub-portion, and the width of the second sub-portion is greater than the width of the third sub-portion.

5. The display panel according to any one of claims 1 to 4, characterized in that: The display panel also includes an opposing substrate arranged on a side of the light-emitting functional layer away from the array substrate, the color filter layer is arranged on a surface of the opposing substrate close to the array substrate, the black matrix is ​​in contact with the opposing substrate, and the color resist block is in contact with the opposing substrate.

6. The display panel according to claim 5, characterized in that: The display panel further includes an encapsulation layer disposed between the light-emitting functional layer and the color filter layer. Under a preset viewing angle, the calculation formula of the shading width of the black matrix to the light-emitting portion adjacent thereto is: w=h1TanA+h2TanB-(w1-w2) / 2; A = arcsin[(n3sinC) / n1]; B = arcsin[(n3sinC) / n2]; Among them, w is the shading width, h1 is the distance from the light-emitting part to the color resist block, h2 is the thickness of the color resist block, w1 is the width of the retaining wall, w2 is the width of the black matrix, n1 is the refractive index of the encapsulation layer, n2 is the refractive index of the color resist block, n3 is the refractive index of air, A is the incident angle of the first light seen at the preset viewing angle when the encapsulation layer enters the color resist block, B is the incident angle of the first light when the color resist block enters the opposing substrate, and C is the preset viewing angle.

7. The display panel according to claim 6, characterized in that: The encapsulation layer includes an organic encapsulation layer, the distance between the light-emitting portion and the opposing substrate along the thickness direction of the display panel has a first value, the thickness of the organic encapsulation layer in the display area of ​​the display panel has a second value, the first value decreases as the second value decreases, and the amount by which the first value decreases is equal to the amount by which the second value decreases.

8. The display panel according to claim 7, characterized in that: A distance between the light emitting portion and the counter substrate along a thickness direction of the display panel is less than or equal to 10 micrometers.

9. The display panel according to claim 1, characterized in that: The display panel further includes a touch electrode layer disposed between the light-emitting functional layer and the color filter layer, and the orthographic projection of the touch electrode layer on the array substrate is located within the coverage range of the orthographic projection of the black matrix on the array substrate.

10. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 9.

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