Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a substrate; the array layer is positioned on one side of the substrate; the light-emitting units are located on the side, away from the substrate, of the array layer, and each light-emitting unit comprises a first electrode, a light-emitting layer and a second electrode which are sequentially arranged away from the substrate; the pixel definition layer is located on the side, away from the substrate, of the array layer, the pixel definition layer comprises a plurality of pixel openings, the pixel openings correspond to the light-emitting units, and the projection of the light-emitting layer on the pixel definition layer is located in the pixel openings; the first metal part is located between the array layer and the first electrode; in the direction perpendicular to the substrate, the part, overlapped with the pixel opening, of the first metal part is a first overlapping part; in the first direction, within a first preset distance, the first overlapping parts corresponding to at least two same-color light-emitting units are arranged according to a first symmetric rule. Through the symmetrically arranged first overlapping parts, the problem of color cast caused by irregular arrangement of the first overlapping parts is solved.

Description

[0001] This application is a divisional application of application number 202111040004.9, application date September 6, 2021, and invention name “Display panel and display device”. Technical Field

[0002] The present application relates to the technical field of display devices, and more specifically, to a display panel and a display device. Background Art

[0003] With the continuous advancement of science and technology, more and more display devices are widely used in people's daily life and work, bringing great convenience to people's daily life and work, and becoming an indispensable tool for people today. The main component of a display device to realize the display function is the display panel. OLED (organic light-emitting semiconductor) display panel is a mainstream display panel of current display devices.

[0004] In the existing OLED display panel, due to the layout problem of the metal layer on the side where the metal layer light emitting unit faces the base substrate, the display panel has a color shift problem. Summary of the invention

[0005] In view of this, the present application provides a display panel and a display device, and the scheme is as follows:

[0006] A display panel, the display panel comprising:

[0007] substrate substrate;

[0008] An array layer, located on one side of the substrate;

[0009] A plurality of light-emitting units are located on a side of the array layer away from the base substrate, and the light-emitting units include a first electrode, a light-emitting layer, and a second electrode which are sequentially arranged away from the base substrate;

[0010] A pixel definition layer is located on a side of the array layer away from the base substrate, the pixel definition layer includes a plurality of pixel openings, the pixel openings correspond to the light-emitting units, and the projection of the light-emitting layer on the pixel definition layer is located within the pixel openings;

[0011] A first metal portion, located between the array layer and the first electrode;

[0012] Among them, in the direction perpendicular to the base substrate, the part where the first metal part overlaps with the pixel opening is the first overlapping part; along the first direction, within a first preset distance, at least two first overlapping parts corresponding to the same color light-emitting units are arranged according to a first symmetry rule, and the first direction is parallel to the base substrate.

[0013] The technical solution of the present application also provides a display device, comprising the above-mentioned display panel.

[0014] From the above description, it can be seen that in the display panel and display device provided by the technical solution of the present application, along the first direction and within the first preset distance, the first overlapping parts corresponding to at least two light-emitting units of the same color are arranged according to the first symmetry rule, thereby solving the color deviation problem caused by the irregular layout of the first overlapping parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0016] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which this application can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by this application, should still fall within the scope of the technical contents disclosed in this application.

[0017] Figure 1 A top view of a light-emitting unit and a metal part in a display panel provided in an embodiment of the present application;

[0018] Figure 2 A cross-sectional view of a display panel provided in an embodiment of the present application;

[0019] Figure 3 A top view of a light-emitting unit and a metal part in another display panel provided in an embodiment of the present application;

[0020] Figure 4 An enlarged view of a light-emitting unit and a first via layout provided in an embodiment of the present application;

[0021] Figure 5 A cross-sectional view of another display panel provided in an embodiment of the present application;

[0022] Figure 6 A top view of a light-emitting unit and a metal part in another display panel provided in an embodiment of the present application;

[0023] Figure 7 A top view of a light-emitting unit and a metal part in another display panel provided in an embodiment of the present application;

[0024] Figure 8 A graph of viewing angle and chromaticity provided in an embodiment of the present application;

[0025] Fig. 9 A schematic diagram of the structure of a display device provided in this application. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the embodiments in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] The OLED display panel includes: a substrate; an array layer, located on one side of the substrate, the array layer having a pixel circuit connection; a plurality of light-emitting units on the side of the array layer away from the substrate, the light-emitting units having a first electrode, a light-emitting layer, and a second electrode sequentially away from the substrate; a pixel definition layer, located on the side of the array layer away from the substrate, the pixel definition layer including a plurality of pixel openings, the pixel openings corresponding to the light-emitting units, and the projection of the light-emitting layer on the pixel definition layer is located within the pixel openings. The first electrode needs to be connected to the pixel circuit through a first metal portion. The pixel definition layer, located on the side of the array layer away from the substrate, the pixel definition layer including a plurality of pixel openings, the pixel openings corresponding to the light-emitting units, and the projection of the light-emitting layer on the pixel definition layer is located within the pixel openings and has a first overlapping portion.

[0028] In a conventional layout, the first overlapping portions are arranged irregularly, which results in uneven height fluctuations of the first electrodes of the light-emitting units, causing display color deviation problems and affecting the display quality of the display panel.

[0029] In order to solve the above problems, an embodiment of the present application provides a display panel, in which a first overlapping portion corresponding to at least two same-color light-emitting units is arranged along a first direction within a first preset distance according to a first symmetry rule, so that the first electrodes of the same-color light-emitting units have better symmetry. Through the symmetrical undulating changes of the first electrode, the display color deviation problem is eliminated and the display quality is improved.

[0030] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] like Figure 1 and Figure 2 As shown, Figure 1 A top view of a light-emitting unit and a metal part in a display panel provided in an embodiment of the present application, Figure 2 A cross-sectional view of a display panel provided in an embodiment of the present application, the display panel comprising:

[0032] Base substrate 11;

[0033] An array layer 12 is located on one side of the base substrate 11;

[0034] A plurality of light emitting units 13 are located on a side of the array layer 12 away from the base substrate 11. The light emitting units 13 include a first electrode 131, a light emitting layer 132, and a second electrode ( Figure 1 and Figure 2 not shown);

[0035] The pixel definition layer 14 is located on a side of the array layer 12 away from the base substrate 11 . The pixel definition layer 14 includes a plurality of pixel openings 141 . The pixel openings 141 correspond to the light-emitting units 13 , and the projection of the light-emitting layer 132 on the pixel definition layer 14 is located within the pixel openings 141 .

[0036] The first metal portion 15 is located between the array layer 12 and the first electrode 131;

[0037] Among them, in the direction perpendicular to the base substrate 11, the part where the first metal part 15 overlaps with the pixel opening 141 is the first overlapping part 151; along the first direction X, within the first preset distance L1, at least two first overlapping parts 151 corresponding to the same color light-emitting units 13 are arranged according to the first symmetry rule, and the first direction X is parallel to the base substrate 11.

[0038] Along the first direction X, within the first preset distance L1, the first light-emitting unit and the second light-emitting unit are set as two same-color light-emitting units 13 that satisfy the first symmetry rule. Both the first light-emitting unit and the second light-emitting unit will have a display color deviation problem due to the corresponding first overlapping portion 151. Since the first overlapping portion 151 of the first light-emitting unit and the first overlapping portion 151 of the second light-emitting unit satisfy the first symmetry rule, the color deviations of the first light-emitting unit and the second light-emitting unit can compensate for each other. Therefore, in the embodiment of the present application, along the first direction X, within the first preset distance L1, the first overlapping portion 151 corresponding to the two same-color light-emitting units 13 is set according to the first symmetry rule, which can solve the color deviation problem of the two same-color light-emitting units 13 in the first direction X due to the irregular distribution of the first overlapping portion 151.

[0039] Along the first direction X, within the set first preset distance L1, if the first overlapping portions 151 corresponding to the two same-color light-emitting units 13 satisfy the first symmetry rule, the color deviation problem of the two same-color light-emitting units 13 within the first preset distance L1 can be solved. The first preset distance L1 can be set based on demand. Obviously, in the display panel, in the first direction X, the more first overlapping portions 151 satisfying the first symmetry rule, the better the effect of compensating the color deviation by the first symmetry rule, the less obvious the display color deviation problem, and the better the display effect.

[0040] The first direction X can be set based on demand. Optionally, when the light-emitting units 13 are arranged in an array, the first direction X can be the row direction of the array. In this case, the color deviation problem in the row direction can be solved. If the first direction X is the column direction of the array, the color deviation problem in the column direction can be solved. In other ways, the first direction X can also be other directions that intersect with the row direction and are not perpendicular to it. The first direction X is not specifically limited in the embodiment of the present application.

[0041] Along the first direction X, within the first preset distance L1, at least two first overlapping portions 151 corresponding to the same-color light-emitting units 13 are arranged according to the first symmetry rule, including: the multiple light-emitting units 13 arranged in the first direction X include at least one first symmetrical structure, the first symmetrical structure includes two light-emitting units 13, and the first overlapping portions 151 corresponding to the two light-emitting units 13 meet the first symmetry rule. And / or, the multiple light-emitting units 13 arranged in the first direction X include at least one second symmetrical structure, the second symmetrical structure has 2N light-emitting units 13, and N is a positive integer greater than 1. In the same second symmetrical structure, the first overlapping portions 151 corresponding to N light-emitting units 13 as a whole meet the first symmetry rule relative to the first overlapping portions 151 corresponding to the other N light-emitting units 13.

[0042] Along the first direction X, within the first preset distance L1, if the first overlapping portions 151 corresponding to the two light-emitting units 13 satisfy the first symmetry rule, the two first overlapping portions 151 corresponding to the two light-emitting units 13 are axially symmetrical, and the axis of symmetry is the axis of symmetry of the two light-emitting units 13; and / or, the two light-emitting units 13 are centrally symmetrical, and the center of symmetry is the center of symmetry of the two light-emitting units 13.

[0043] exist Figure 1 In the illustrated method, four columns of light-emitting units are shown, and each column of light-emitting units corresponds to a first metal portion 15. The four columns of light-emitting units are set to be the first column of light-emitting units to the fourth column of light-emitting units in the first direction X. The light-emitting units 13 in the same row in the first column and the third column have the same light-emitting color, and the light-emitting units 13 in the same row in the second column and the fourth column of light-emitting units have the same light-emitting color. At this time, the first preset distance L1 is the width occupied by three consecutive adjacent columns of light-emitting units in the first direction X.

[0044] The first overlapping portion 151 corresponding to any light-emitting unit 13 in the first column and the first overlapping portion 151 corresponding to the light-emitting unit 13 in the same row in the third column are axially symmetrical, that is, two adjacent light-emitting units 13 of the same color in the first direction X meet the first symmetry rule. The first overlapping portion 151 corresponding to any light-emitting unit 13 in the second column and the first overlapping portion 151 corresponding to the light-emitting unit 13 in the same row in the fourth column are axially symmetrical, that is, two adjacent light-emitting units 13 of the same color in the first direction X meet the first symmetry rule.

[0045] In the embodiment of the present application, along the second direction Y, within the second preset distance L2, the first overlapping portions 151 corresponding to at least two same-color light-emitting units 13 are arranged according to the second symmetry rule, and the second direction Y is parallel to the base substrate 11 and perpendicular to the first direction X. The second symmetry rule may be the same as or different from the first symmetry rule, that is, both may be axially symmetrical or centrally symmetrical at the same time, or one may be axially symmetrical and the other may be centrally symmetrical.

[0046] Along the second direction Y, within the second preset distance L2, the first overlapping portion 151 corresponding to the third light-emitting unit and the fourth light-emitting unit is set to satisfy the second symmetry rule, and the third light-emitting unit and the fourth light-emitting unit will both have a display color deviation problem due to the corresponding first overlapping portion 151. Since the first overlapping portion 151 of the third light-emitting unit and the first overlapping portion 151 of the fourth light-emitting unit satisfy the second symmetry rule, the color deviations of the third light-emitting unit and the fourth light-emitting unit can compensate for each other. Therefore, in the embodiment of the present application, along the second direction Y, within the second preset distance L2, the first overlapping portions 151 corresponding to the two same-color light-emitting units 13 are set according to the second symmetry rule, which can solve the color deviation problem of the two same-color light-emitting units 13 in the second direction X due to the irregular distribution of the first overlapping portions 151. Figure 1 In the above manner, the second preset distance L2 is the length occupied by four light emitting units 13 arranged continuously in the same column in the column direction.

[0047] Along the second direction Y, within the set second preset distance L2, if the first overlapping portions 151 corresponding to the two same-color light-emitting units 13 satisfy the first symmetry rule, the color deviation problem of the two same-color light-emitting units 13 within the second preset distance L2 can be solved. The second preset distance L2 can be set based on demand. Similarly, in the second direction Y, the more first overlapping portions 151 satisfying the second symmetry rule, the better the effect of compensating the color deviation through the second symmetry rule, the less obvious the display color deviation problem, and the better the display effect.

[0048] The second direction Y is perpendicular to the first direction X, and the second direction Y can be determined based on the first direction. When the first direction X is the row direction of the array, the second direction Y is the column direction of the array, and when the first direction X is the column direction of the array, the second direction Y is the row direction of the array. When the first direction X is another direction that intersects with the row direction and is not perpendicular, the second direction Y is determined based on the perpendicular relationship. When the layout of the light-emitting unit 13 in the display panel is certain, the first direction X and the second direction Y can be set by arranging the extension direction of the first metal part 15.

[0049] Along the second direction Y, within the second preset distance L2, the first overlapping portion 151 corresponding to at least two light-emitting units 13 of the same color is arranged according to the second symmetry rule, including: among the multiple light-emitting units 13 arranged in the second direction Y, at least one third symmetric structure is included, the third symmetric structure includes two light-emitting units 13, and the first overlapping portion 151 corresponding to the two light-emitting units 13 satisfies the second symmetry rule. And / or, among the multiple light-emitting units 13 arranged in the second direction Y, at least one fourth symmetric structure is included, and the fourth symmetric structure has 2M light-emitting units 13, where M is a positive integer greater than 1. In the same fourth symmetric structure, the first overlapping portion 151 corresponding to the M light-emitting units 13 as a whole satisfies the second symmetry rule relative to the first overlapping portion 151 corresponding to the other M light-emitting units 13.

[0050] Along the second direction Y, within the second preset distance L2, if the first overlapping portions 151 corresponding to the two light emitting units 13 satisfy the second symmetry rule, the two first overlapping portions 151 corresponding to the two light emitting units 13 are axially symmetrical, or the two light emitting units 13 are centrally symmetrical. Figure 1 In the illustrated manner, the second symmetry rule is explained by taking the center of the first overlapping portion 151 of two light emitting units 13 as an example.

[0051] Specifically, in Figure 1 In the manner shown, in any column of light-emitting units, the first overlapping portions 151 corresponding to two adjacent same-color light-emitting units 13 in the second direction Y satisfy the central symmetry, that is, the two adjacent same-color light-emitting units 13 in the second direction Y satisfy the second symmetry rule. For example, along the second direction Y, in the first column, the first overlapping portion 151 corresponding to the first red light-emitting unit R is centrally symmetric with the first overlapping portion 151 corresponding to the adjacent second red light-emitting unit 151, and the first overlapping portion 151 corresponding to the first blue light-emitting unit B is centrally symmetric with the first overlapping portion 151 corresponding to the adjacent second blue light-emitting unit B.

[0052] like Figure 1 As shown, the first direction X can be set as the row direction of the light emitting units 13 in the display panel, and the second preset distance L2 is greater than or equal to the first preset distance L1. Setting the second preset distance L2 to be greater than or equal to the first preset distance L1 can make the degree of symmetry in the first direction X not weaker than the degree of symmetry in the second direction Y.

[0053] The first metal portion 15 is used to connect the first electrode 131 of the light emitting unit 13 and the transistor in the pixel circuit. In the display panel, the first metal portion 15 is mainly wired along the column direction of the light emitting unit 13. When the first direction X is the row direction in which the light emitting units 13 are arranged, the symmetry of the first overlapping portion 151 in the first direction X needs to be stronger than the symmetry in the second direction, so as to have a better color cast compensation effect and achieve better image display quality.

[0054] like Figure 1 and Figure 2 As shown, the first metal portion 15 is connected to the first electrode 131 through the first via hole Via1; in a direction perpendicular to the base substrate 11, the first via hole Via1 does not overlap with the pixel opening 141. In a direction perpendicular to the base substrate 11, the first via hole Via1 and the pixel opening 141 are arranged not to overlap, thereby avoiding the problem of uneven local protrusion of the first electrode 131 in the pixel opening 141 caused by the first via hole Via1 when the two overlap, thereby avoiding the color shift problem caused by this.

[0055] exist Figure 1 In the manner shown, a portion of the first via holes Via1 do not overlap with the corresponding pixel opening 141, such as the circular first via holes Via1, and another portion of the first via holes Via1 overlaps with the corresponding pixel opening 131, such as the rectangular first via holes Via1. Figure 1 The circular and rectangular first via holes Via1 are only used to indicate whether the first via holes Via1 overlap with the pixel opening 141 . The shape of the first via holes Via1 may be rectangular, circular, triangular or other geometric shapes.

[0056] In a direction perpendicular to the base substrate 11, the first via holes Via1 connected to at least part of the first electrodes 131 may be arranged not to overlap with the corresponding pixel openings 141, so as to avoid the problem of uneven local protrusions of the first electrodes 131 due to the overlap of the first via holes Via1 and the pixel openings 141. Optionally, the first via holes Via1 connected to all the first electrodes 131 may be arranged not to overlap with the corresponding pixel openings 141.

[0057] The display panel has a plurality of columns of light emitting units 13 arranged in sequence and a plurality of rows of light emitting units 13 arranged in sequence. The row direction is perpendicular to the column direction. The display panel includes a red light emitting unit R, a green light emitting unit G and a blue light emitting unit B.

[0058] exist Figure 1In the manner shown, in the same column, any three consecutively arranged light-emitting units 13 have different light-emitting colors. In the same row, all light-emitting units 13 have the same light-emitting color. In the second direction Y, in any three consecutive rows, the light-emitting colors of the light-emitting units 13 are different. For three consecutive rows in the second direction, the light-emitting units 13 in the third row and the light-emitting units 13 in the first row and the second row have overlapping parts in the first direction X. In this manner, the light-emitting units 13 in odd columns are located in odd rows, and the light-emitting units 13 in even columns are located in even rows. For example, the first red light-emitting unit R in the first column is located in the first row, and the first blue light-emitting unit B is located in the third row; the first green light-emitting unit G in the second column is located in the second row, and the first red light-emitting unit R is located in the fourth row. In other manners, the light-emitting units 13 in odd columns can also be located in even rows, and the light-emitting units 13 in even columns can be located in odd rows.

[0059] In the display panel, the arrangement of the light emitting units 13 is not limited to Figure 1 As shown, the arrangement of the light emitting units 13 can be arranged based on requirements.

[0060] like Figure 3 As shown, Figure 3 A top view of another light-emitting unit and metal part in a display panel provided in an embodiment of the present application, in which, in any two adjacent columns, the light-emitting units 13 in one column are all green light-emitting units G, and the other column includes a plurality of red light-emitting units R and blue light-emitting units B arranged alternately in the column direction; in any two adjacent rows, the light-emitting units 13 in one row are all green light-emitting units G, and the other row includes a plurality of red light-emitting units R and blue light-emitting units B arranged alternately in the row direction; a red light-emitting unit R or a blue light-emitting unit B is arranged in the middle of the four green light-emitting units G arranged in 2×2. In this method, the first metal part 15 corresponding to the entire column of green light-emitting units is not shown, and the first via hole Via1 connecting the first metal part 151 and the first electrode 131 is not shown.

[0061] like Figure 4 As shown, Figure 4 An enlarged view of a light emitting unit and a first via layout provided in an embodiment of the present application, combined with Figure 1 , Figure 2 and Figure 4As shown, in the second direction Y, the distance H between the first via hole Via1 and the pixel opening 141 is greater than 1.5 μm. When the distance H between the first via hole Via1 and the pixel opening 141 is greater than 1.5 μm, in the second direction Y, the first via hole Via1 and the pixel opening 141 have a large distance, which can better avoid the problem of uneven local protrusion of the first electrode 131 in the pixel opening 141 due to the close distance or even overlap between the first via hole Via1 and the pixel opening 141, thereby avoiding the color deviation problem caused by this.

[0062] like Figure 5 As shown, Figure 5 A cross-sectional view of another display panel provided in an embodiment of the present application, combined with Figure 1 and Figure 5 The first metal portion 15 is connected to the first electrode 131 through the first via hole Via1. Figure 5 In the illustrated manner, in a direction perpendicular to the base substrate 11, the first via hole Via1 overlaps with the pixel opening 141; along the first direction X, within the third preset distance L3, at least two first via holes Via1 corresponding to the same-color light-emitting units 13 are arranged according to a first symmetric rule. If the first via hole Via1 overlaps with the corresponding pixel opening 141, the vertical projection of the first via hole Via1 on the base substrate 11 is at least partially located within the vertical projection of the pixel opening 141 on the base substrate 11.

[0063] Along the first direction X, within the third preset distance L3, the first via hole Via1 connecting the fifth light-emitting unit and the sixth light-emitting unit of the same color is set to be arranged according to the first symmetry rule. The first electrode 131 of the fifth light-emitting unit has poor flatness due to the first via hole Via1 connected to it, resulting in color deviation. Similarly, the sixth light-emitting unit also has color deviation due to the poor flatness of the first electrode 131. Since the first via hole Via1 connected to the fifth light-emitting unit and the sixth light-emitting unit satisfies the first symmetry rule, the color deviations of the fifth light-emitting unit and the sixth light-emitting unit compensate each other. Therefore, in the embodiment of the present application, along the first direction X, within the third preset distance L3, the first via holes Via1 corresponding to the two light-emitting units 13 of the same color are arranged according to the first symmetry rule, which can solve the color deviation problem caused by the overlap of the first via hole Via1 and the corresponding pixel opening 141 of the two light-emitting units 13 of the same color in the first direction X.

[0064] exist Figure 1In the illustrated manner, the first via holes Via1 connected to some of the light-emitting units 13 are illustrated. In the two green light-emitting units G in the second row, the first via holes Via1 of the two satisfy the first symmetry rule. Specifically, the two first via holes Via1 are symmetrical about the perpendicular bisector of the midpoint line connecting the midpoints of the two green light-emitting units G, and are also symmetrical about the midpoint of the center line connecting the two green light-emitting units G; in the two blue light-emitting units B in the third row, the first via holes Via1 of the two satisfy the first symmetry rule. Specifically, the two first via holes Via1 are symmetrical about the perpendicular bisector of the midpoint line connecting the midpoints of the two blue light-emitting units B, and are also symmetrical about the midpoint of the center line connecting the two blue light-emitting units B. Other first via holes Via1 not shown may not overlap with the corresponding pixel opening 141, or may overlap with the corresponding pixel opening 141, and are arranged according to the above-mentioned first symmetry rule.

[0065] Since the first via hole Via1 connected to the first electrode 131 directly affects its flatness, the symmetry requirement of the first via hole Via1 in the row direction is higher than the symmetry requirement of the first metal part 15 in the row direction. There is a planarization layer 16 between the first metal part 15 and the first electrode 131, and the first via hole Via1 is directly connected to the first electrode 131, so the influence of the first via hole Via on the flatness of the first electrode 131 is stronger than the influence of the first metal part on the flatness of the first electrode 131. Therefore, when the first direction X is the row direction of the light-emitting unit 13 in the display panel, setting the third preset distance L3 to be less than or equal to the first preset distance L1 can make the symmetry degree of the first via hole Via1 in the row direction not weaker than the symmetry degree of the first metal part 15 in the row direction, thereby better solving the display color deviation problem.

[0066] In the embodiment of the present application, the first metal part 15 is connected to the first electrode 131 through the first via hole Via1; in the direction perpendicular to the base substrate 11, if the first via hole Via1 overlaps with the pixel opening 141, method one: along the first direction X, within the third preset distance L3, at least two first via holes Via1 corresponding to the same color light-emitting units 13 are arranged according to the first symmetry rule; and / or, along the second direction Y, within the fourth preset distance L4, at least two first via holes Via1 corresponding to the same color light-emitting units 13 are arranged according to the second symmetry rule, and the second direction Y is parallel to the base substrate and perpendicular to the first direction X.

[0067] As analyzed above, when at least two first via holes Via1 corresponding to the same-color light-emitting units 13 are arranged according to the first symmetry rule within the third preset distance L3 along the first direction X, the color deviation problem caused by the overlap of the first via hole Via1 and the pixel opening 141 in the first direction X can be solved.

[0068] Similarly, when at least two first via holes Via1 corresponding to the same-color light-emitting units 13 are arranged according to the second symmetry rule within the fourth preset distance L4 along the second direction Y, the color deviation problem caused by the overlap of the first via hole Via1 and the pixel opening 141 in the second direction Y can be solved.

[0069] When along the first direction X, within the third preset distance L3, at least two first via holes Via1 corresponding to the same color light-emitting units 13 are arranged according to the first symmetry rule, and along the second direction Y, within the fourth preset distance L4, at least two first via holes Via1 corresponding to the same color light-emitting units 13 are arranged according to the second symmetry rule, not only can the color deviation problem caused by the overlap of the first via hole Via1 and the pixel opening 141 in the first direction X be solved, but also the color deviation problem caused by the overlap of the first via hole Via1 and the pixel opening 141 in the second direction Y can be solved.

[0070] In the embodiment of the present application, the display panel includes at least one of the following four symmetrical structures:

[0071] The first symmetrical structure: along the first direction X, within the first preset distance L1, at least two first overlapping portions 151 corresponding to the same-color light-emitting units 13 are arranged according to the first symmetrical rule; this method can solve the color deviation problem caused by the overlap of the first overlapping portion 151 and the first electrode 131 in the first direction X.

[0072] The second symmetrical structure: along the second direction Y, within the second preset distance L2, at least two first overlapping portions 151 corresponding to the same-color light-emitting units 13 are arranged according to the second symmetrical rule; this method can solve the color deviation problem caused by the overlap of the first overlapping portion 151 and the first electrode 131 in the second direction Y.

[0073] The third symmetrical structure: in the direction perpendicular to the base substrate 11, if the first via hole Via1 overlaps with the corresponding pixel opening 141, along the first direction X, within the third preset distance L3, at least two first via holes Via1 corresponding to the same color light-emitting units 13 are arranged according to the first symmetrical rule; this method can solve the color deviation problem caused by the overlap of the first via hole Via1 and the pixel opening 141 in the first direction X.

[0074] Fourth symmetrical structure: in the direction perpendicular to the base substrate 11, if the first via hole Via1 overlaps with the corresponding pixel opening 141, along the second direction Y, within the fourth preset distance L4, at least two first via holes Via1 corresponding to the same-color light-emitting units 13 are arranged according to the second symmetrical rule. This method can solve the color deviation problem caused by the overlap of the first via hole Via1 and the pixel opening 141 in the second direction Y.

[0075] In the embodiments of the present application, any arrangement or combination of the above four symmetrical structures may be adopted.

[0076] If the first direction X is the row direction in which the light-emitting units 13 are arranged in the display panel, the fourth preset distance L4 is less than or equal to the second preset distance L2. The first direction X is the row direction, and based on the vertical relationship, the second direction Y is the column direction. When the second symmetrical structure and the fourth symmetrical structure are included at the same time, since the first via hole Via1 connected to the first electrode 131 directly affects its flatness, the symmetry requirement of the first via hole Via1 in the column direction is higher than the symmetry requirement of the first metal part 15 in the column direction. Setting the fourth preset distance L4 to be less than or equal to the second preset distance L2 can make the symmetry degree of the first via hole Via1 in the column direction not weaker than the symmetry degree of the first metal part 15 in the row direction, thereby better solving the display color deviation problem.

[0077] like Figure 6 As shown, Figure 6 A top view of a light emitting unit and a metal part in another display panel provided in an embodiment of the present application, combined with Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the array layer 12 includes a plurality of pixel circuits, the pixel circuits correspond to the light-emitting units 13, and the pixel circuits are used to control the light-emitting units 13 to emit light and display; the first metal part 15 is electrically connected to the pixel circuit through the second metal part; wherein, in a direction perpendicular to the base substrate 11, the second metal part and the pixel opening 141 have a second overlapping portion; along the first direction X, within the fifth preset distance L5, at least two second overlapping portions corresponding to the same color light-emitting units 13 are arranged according to the first symmetric rule. The second metal part can be provided to include a second via hole Via2 directly connecting the pixel circuit and the first metal part 15. Figure 6 In the illustrated method, for the sake of clarity, only two second metal parts are shown, and other second metal parts, the first metal part 15 and the first via Via1 are not shown. The layout of the two can be described in the above embodiment, and this method will not be repeated.

[0078] In other embodiments, at least one metal layer is included between the pixel circuit and the first metal portion 15, and the first metal portion 15 and the metal layer and the metal layer and the pixel circuit are connected through vias. In this case, the second metal portion includes: the metal between the first metal portion 15 and the pixel circuit and the via. In this embodiment, the first symmetry rule includes axial symmetry, and the second symmetry rule includes central symmetry.

[0079] In the embodiment of the present application, along the first direction X, within the fifth preset distance L5, the second overlapping portions corresponding to at least two same-color light-emitting units 13 are arranged according to the first symmetry rule, and the color deviation of the same-color light-emitting units 13 is compensated and offset, thereby solving the color deviation problem caused by the irregular distribution of the second metal portion in the first direction X of the same-color light-emitting units 13.

[0080] Compared with the first overlapping portion 151, since the second overlapping portion has a larger distance relative to the first electrode 131, its effect on the flatness of the first electrode 131 is weaker, so the fifth preset distance L5 is set to be greater than or equal to the first preset distance L1, so that the degree of symmetry of the first overlapping portion 151 is not weaker than that of the second overlapping portion, so as to better compensate for color deviation.

[0081] In one embodiment of the present application, as Figure 1 and Figure 3 As shown, the two same-color light-emitting units 13 corresponding to the two first overlapping portions 151 arranged according to the first symmetry rule are two adjacent same-color light-emitting units 13 in the first direction X. In this way, in the first direction X, the compensation of the color deviation displayed by the two same-color light-emitting units 13 is achieved within the minimum distance, which can better solve the color deviation problem in the first direction X.

[0082] In other ways, such as Figure 7 As shown, Figure 7 A cross-sectional view of another display panel provided in an embodiment of the present application, in which n other light-emitting units 13 are provided between two light-emitting units 13 of the same color corresponding to two first overlapping portions 151 arranged in a first symmetric rule, where n is a positive integer. The first overlapping portion corresponding to the n other light-emitting units 13 may have a non-symmetrical layout design. Figure 7 In the example of n=3, n can be set based on demand. Since two adjacent same-color light-emitting units 13 in the first direction X are arranged in a symmetrical manner, although the compensation effect is good, the wiring method is too ideal, which is not conducive to the complex wiring situation in the actual product. The arrangement method provided in this embodiment reduces the number of first overlapping parts 151 that need to be symmetrically arranged, facilitates the routing layout of the first metal part 15, and reduces the difficulty of the routing layout of the first metal part 15 while achieving a certain degree of color deviation compensation, which can compromise the routing layout of the first metal part 15 and the effect of compensating for color deviation.

[0083] Optionally, n≤3 is set. If the value of n is too large, the distance between the light-emitting units 13 corresponding to the first overlapping portion 151 that meets the first symmetry rule is too large, resulting in a poor color deviation compensation effect. When n≤3, on the one hand, the problem of poor compensation effect caused by the large distance between the light-emitting units 13 corresponding to the first overlapping portion 151 that meets the corresponding rule is solved. On the other hand, based on demand, it can be set that there are 1, 2 or 3 other light-emitting units 13 between the light-emitting units 13 corresponding to the first overlapping portion 151 that meets the corresponding rule. Based on the accuracy of color difference compensation, the value of n is selected to select an appropriate wiring symmetry accuracy, compromise the routing layout of the first metal portion 15 and the effect of compensating for color deviation, and facilitate the routing layout of the first metal portion 15 while having a better color deviation compensation effect. Therefore, n≤3 is set in the embodiment of the present application.

[0084] Optionally, the first preset distance L1 is less than or equal to 200 μm. For currently common display panels, based on the design size of the light-emitting unit 13, the inventors have found that when the first preset distance L1 is less than or equal to 200 μm, a better color deviation compensation effect can be achieved. If the first preset distance L1 exceeds 200 μm, the color deviation compensation effect is poor. Therefore, in the embodiment of the present application, the first preset distance L1 is set to be less than or equal to 200 μm.

[0085] In the embodiment of the present application, the display panel includes at least a red light emitting unit R, a green light emitting unit G, and a blue light emitting unit B. Based on the color property of light, the red light emitting unit R is more easily affected by the flatness of the first electrode 151 and has color deviation, so in the embodiment of the present application, along the first direction X, within the first distance, at least two first overlapping portions 151 corresponding to the red light emitting units R are arranged according to the first symmetric rule, so as to better solve the color deviation problem of the red light emitting unit R caused by the poor flatness of the first electrode 131.

[0086] As described above, the display panel includes at least a red light emitting unit R, a green light emitting unit G, and a blue light emitting unit B. Since the area of ​​the blue light emitting unit B is larger, the pixel opening 141 is larger, and the area of ​​the first overlapping portion 141 exposed by the pixel opening 141 is larger, the color shift of the blue light emitting unit B is also greater. Therefore, in the embodiment of the present application, along the first direction X, within the first distance, at least two first overlapping portions 151 corresponding to the blue light emitting units B are arranged according to the first symmetric rule, so as to better solve the color shift problem of the blue light emitting unit B caused by the poor flatness of the first electrode 131.

[0087] The first direction X can be set as the row direction of the light emitting units 13 in the display panel; the first symmetry rule is axial symmetry according to the first symmetry axis, and the first symmetry axis is the symmetry axis of the two same-color light emitting units 13 corresponding to the first overlapping portion 151 symmetrically arranged along the first direction X; or the first symmetry rule is centrosymmetry according to the first symmetry center, and the first symmetry center is the symmetry center of the two same-color light emitting units 13 corresponding to the first overlapping portion 151 symmetrically arranged along the first direction. Along the first direction X, by setting the first overlapping portion 151 axially symmetrical or centrosymmetric, the color deviation caused by the first overlapping portion 151 corresponding to the two same-color light emitting units 13 in the first direction X can be compensated and offset, so as to improve the display quality.

[0088] The second symmetry rule may also be central symmetry based on the second symmetry center, where the second symmetry center is the symmetry center of the two same-color light-emitting units 13 corresponding to the first overlapping portion 151 symmetrically arranged along the second direction Y. Along the second direction Y, by setting the first overlapping portion centrally symmetrically, the color deviations caused by the first overlapping portions 151 corresponding to the two same-color light-emitting units 13 in the second direction Y can be compensated and offset, thereby improving the display quality.

[0089] In the embodiment of the present application, the first metal portion 15 may be a metal layer, which is used to make a signal line of the data voltage Vdata, a signal line of the positive voltage PVDD, and a light shielding layer of the IGZO TFT. The first metal portion 15 has a high utilization rate, has many overlapping portions with the pixel opening 141, and has a large number of first via holes Via1 on the metal layer. There are relatively many first via holes Via1 on the metal layer that overlap with the pixel opening 141. Therefore, the first overlapping portion 151 and the first via holes Via1 have a greater impact on the flatness of the first electrode 131.

[0090] In the prior art, the first overlapping portion 151 and the first via hole Via1 do not have a specific symmetrical layout, resulting in a serious display color deviation problem. This is because the first electrode 131 has poor flatness, which will cause the color resistance layer located on the light-emitting side of the light-emitting unit 13 to have poor flatness, affecting the light transmission uniformity of the color resistance layer, resulting in color deviation. In the technical solution of the present application, a specific symmetrical layout solution is used to solve the display color deviation problem caused by the poor flatness of the first electrode.

[0091] like Figure 8 As shown, Figure 8 A graph of viewing angle and chromaticity provided in an embodiment of the present application. The left figure is a graph of viewing angle and chromaticity of a conventional display panel, and the right figure is a graph of viewing angle and chromaticity of a display panel in an embodiment of the present application. The horizontal axis is viewing angle, the vertical axis is chromaticity, and w, r, g and b represent curves of white light, red light, green light and blue light, respectively. Figure 8It can be seen that in the existing display panel, the chromaticity curve of the same color light has poor symmetry and a large color deviation, while in the embodiment of the present application, the chromaticity curve of the same color light has good symmetry and no color deviation.

[0092] In the embodiment of the present application, the light emitting unit 13 is an OLED, the display panel is an HTD (Hybrid TFT Display), and the pixel circuit includes but is not limited to a 7T1C circuit. The pixel circuit has a TFT with an active layer of IGZO (indium gallium zinc oxide) and a TFT with an active layer of polysilicon.

[0093] Based on the above embodiments, another embodiment of the present application further provides a display device, such as Fig. 9 As shown, Fig. 9 This is a schematic diagram of the structure of a display device provided in the present application. The display device shown includes a display panel 21. The display panel 21 can be the display panel described in any one of the above embodiments.

[0094] In the embodiment of the present application, the display device includes but is not limited to electronic devices with display functions such as mobile phones, tablet computers, laptop computers, and smart wearable devices. Since the display panel in the above embodiment is adopted, the color deviation problem caused by the flatness problem of the first electrode is solved through a specific symmetrical layout.

[0095] In this specification, each embodiment is described in a progressive, parallel, or progressive and parallel manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the display device disclosed in the embodiment, since it corresponds to the display panel disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the relevant part of the display panel.

[0096] It should be noted that in the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0097] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0098] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: The display panel comprises: substrate substrate; An array layer, located on one side of the substrate; A plurality of light-emitting units are located on a side of the array layer away from the base substrate, and the light-emitting units include a first electrode; A pixel definition layer, located at a side of the array layer away from the substrate, the pixel definition layer comprising a plurality of pixel openings, and the pixel openings correspond to the light-emitting units; A first metal portion, located between the array layer and the first electrode; Wherein, in a direction perpendicular to the base substrate, the portion where the first metal portion overlaps with the pixel opening is a first overlapping portion; along the first direction, within a first preset distance, at least two first overlapping portions corresponding to the same-color light-emitting units are arranged according to a first symmetric rule, and the first direction is parallel to the base substrate; The first metal portion is connected to the first electrode through a first via hole; In a direction perpendicular to the base substrate, the first via hole does not overlap with the pixel opening; The first symmetry rule is axial symmetry, or the first symmetry rule is central symmetry.

2. The display panel according to claim 1, characterized in that: Along a second direction, within a second preset distance, at least two first overlapping portions corresponding to the same-color light-emitting units are arranged according to a second symmetric rule, and the second direction is parallel to the base substrate and perpendicular to the first direction; The second symmetry rule is central symmetry based on a second symmetry center.

3. The display panel according to claim 2, characterized in that: The second preset distance is greater than or equal to the first preset distance.

4. The display panel according to claim 1, characterized in that: In a second direction, a distance between the first via hole and the pixel opening is greater than 1.5 μm, and the second direction is parallel to the base substrate and perpendicular to the first direction.

5. The display panel according to claim 1, characterized in that: The array layer includes a plurality of pixel circuits, and the pixel circuits correspond to the light-emitting units; a second metal portion is included between the first metal portion and the pixel circuits; The second metal portion and the pixel opening have a second overlapping portion; along the first direction, within a fifth preset distance, at least two second overlapping portions corresponding to the light-emitting units of the same color are arranged according to a first symmetric rule. The display panel according to claim 5 , wherein the fifth preset distance is greater than or equal to the first preset distance.

7. The display panel according to claim 1, characterized in that: The two same-color light-emitting units corresponding to the two first overlapping portions arranged according to the first symmetry rule are two adjacent same-color light-emitting units in the first direction.

8. The display panel according to claim 1, characterized in that: There are n other light-emitting units between the two light-emitting units of the same color corresponding to the two first overlapping parts arranged according to the first symmetry rule, where n is a positive integer.

9. The display panel according to claim 8, characterized in that: n≤3。 10. The display panel according to claim 1, characterized in that: The first preset distance is less than or equal to 200 μm.

11. The display panel according to claim 1, characterized in that: The display panel comprises at least a red light emitting unit, a green light emitting unit and a blue light emitting unit; Along the first direction and within the first distance, at least two first overlapping portions corresponding to the red light-emitting units are arranged according to the first symmetry rule; and / or, Along the first direction and within the first distance, there are at least two first overlapping portions corresponding to the blue light emitting units arranged according to the first symmetric rule.

12. The display panel according to claim 1, characterized in that: The first symmetry rule is axisymmetry according to a first symmetry axis, where the first symmetry axis is the symmetry axis of two same-color light-emitting units corresponding to the first overlapping portion symmetrically arranged along the first direction; or The first symmetry rule is central symmetry based on a first symmetry center, and the first symmetry center is the symmetry center of two same-color light-emitting units corresponding to the first overlapping portion symmetrically arranged along the first direction.

13. The display panel according to claim 2, characterized in that: The second symmetry rule is central symmetry based on a second symmetry center, and the second symmetry center is the symmetry center of two same-color light-emitting units corresponding to the first overlapping portion symmetrically arranged along the second direction.

14. The display panel according to claim 1, characterized in that: The first metal portion is multiplexed as at least one of a data signal line, a positive voltage signal line, or a light shielding layer.

15. The display panel according to claim 1, characterized in that: The plurality of light-emitting units arranged along the first direction include at least one first symmetrical structure, the first symmetrical structure includes two light-emitting units, and the first overlapping portions corresponding to the two light-emitting units satisfy the first symmetrical rule; And / or, the multiple light-emitting units arranged along the first direction include at least one second symmetrical structure, the second symmetrical structure includes 2N light-emitting units, N is a positive integer greater than 1, and in the same second symmetrical structure, the first overlapping portions corresponding to the N light-emitting units satisfy the first symmetry rule relative to the first overlapping portions corresponding to the other N light-emitting units.

16. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-15.

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