Display panel and display apparatus

Abstract

A display panel and a display apparatus. The display panel comprises: a substrate; a pixel-defining layer and a plurality of light-emitting elements, which are located on the same side of the substrate, wherein a plurality of first openings are provided in the pixel-defining layer, and the light-emitting elements are located in the first openings; and a color filter layer, which is located on the side of the pixel-defining layer and the light-emitting elements facing away from the substrate, and comprises a first sub-layer and a second sub-layer, which are stacked in sequence, wherein the first sub-layer comprises a plurality of first color resistors of different colors, the orthographic projections of the first color resistors on the substrate cover the orthographic projections of the light-emitting elements on the substrate, and the orthographic projections of the first color resistors at least partially overlap the orthographic projection of the pixel-defining layer on the substrate; and the second sub-layer comprises a plurality of second color resistors of different colors, the orthographic projections of the second color resistors on the substrate do not overlap the orthographic projections of the light-emitting elements on the substrate, the orthographic projections of the second color resistors on the substrate overlap the overlapping regions between the orthographic projections of the first color resistors and the orthographic projection of the pixel-defining layer on the substrate, and the second color resistors and the first color resistors, the orthographic projections of which overlap, have different colors.

Description

Display panel and display device Technical Field

[0001] This disclosure pertains to the field of display technology, specifically relating to a display panel and a display device. Background Technology

[0002] OLED (Organic Light-Emitting Diode) displays have attracted widespread attention due to their advantages such as self-illumination, low power consumption, thinness, flexibility, vibrant colors, high contrast, and fast response speed. Summary of the Invention

[0003] In a first aspect, embodiments of this disclosure provide a display panel, which includes a substrate.

[0004] A pixel defining layer and multiple light-emitting elements are located on the same side of the substrate;

[0005] The pixel defining layer has multiple first openings, and the light-emitting element is located in the first opening;

[0006] A color filter layer is located on the side of the pixel defining layer and the light-emitting element that is away from the substrate;

[0007] The color filter layer includes a first sub-layer and a second sub-layer, which are stacked sequentially.

[0008] The first sub-layer includes a plurality of first color resists of different colors, the orthographic projection of the first color resists on the substrate covers the orthographic projection of the light-emitting element on the substrate, and the orthographic projections of the first color resists and the pixel defining layer on the substrate at least partially overlap;

[0009] The second sub-layer includes multiple second color resists of different colors. The orthographic projections of the second color resists and the light-emitting element on the substrate do not overlap. The orthographic projections of the second color resists on the substrate overlap with the orthographic projections of the first color resist and the pixel defining layer on the substrate, and the colors of the second color resists and the first color resists in the overlapping orthographic projection area are different.

[0010] In some embodiments, the color filter layer further includes a third sublayer, which is stacked sequentially with the first sublayer and the second sublayer;

[0011] The third sub-layer includes multiple third color resists of different colors. The orthographic projections of the third color resists and the light-emitting element on the substrate do not overlap. The orthographic projections of the third color resists on the substrate overlap with the orthographic projections of the first color resist and the pixel defining layer on the substrate. The orthographic projections of the third color resists and the second color resist on the substrate at least partially overlap.

[0012] The third, second, and first color resists, when projected onto each other, have different colors.

[0013] In some embodiments, the plurality of light-emitting elements are arranged in an array;

[0014] Multiple first color resists are arranged in an array;

[0015] Each of the first color resists and the multiple light-emitting elements corresponds one-to-one;

[0016] Each second color resist corresponds to a column of first color resists, and the orthographic projection of each second color resist on the substrate lies within the orthographic projection of a column of first color resists on the substrate;

[0017] The second color resists of different colors are arranged alternately along the row direction of the array.

[0018] In some embodiments, the plurality of light-emitting elements are arranged in an array;

[0019] Multiple first color resists are arranged in an array;

[0020] Each of the first color resists and the multiple light-emitting elements corresponds one-to-one;

[0021] Multiple second-color resists are arranged in an array;

[0022] Each second color resist corresponds to one first color resist, and the orthographic projection of each second color resist on the substrate lies within the orthographic projection of one first color resist on the substrate.

[0023] In some embodiments, the plurality of the third color resists are arranged in an array;

[0024] Each of the third color resists corresponds to one of the first color resists, and the orthographic projection of each of the third color resists on the substrate lies within the orthographic projection of one of the first color resists on the substrate.

[0025] In some embodiments, the first color resist includes a red first color resist, a green first color resist, and a blue first color resist.

[0026] In the array of the first color resists, the green first color resist and the blue first color resist are arranged alternately in odd-numbered columns, and the red first color resist and the green first color resist are arranged alternately in even-numbered columns; or, the red first color resist and the green first color resist are arranged alternately in odd-numbered columns, and the green first color resist and the blue first color resist are arranged alternately in even-numbered columns.

[0027] In some embodiments, the second color resist includes a red second color resist and a blue second color resist.

[0028] The red second color resistor corresponds to the first color resistor in the odd-numbered column, and the blue second color resistor corresponds to the first color resistor in the even-numbered column;

[0029] Alternatively, the red second color resistor corresponds to the first color resistor in the even-numbered column, and the blue second color resistor corresponds to the first color resistor in the odd-numbered column.

[0030] In some embodiments, the second color resist includes a red second color resist and a green second color resist.

[0031] The red second color resistor corresponds one-to-one with the green first color resistor, a portion of the green second color resistor corresponds one-to-one with the red first color resistor, and another portion of the green second color resistor corresponds one-to-one with the blue first color resistor.

[0032] In some embodiments, the second color resist includes a green second color resist and a blue second color resist.

[0033] The blue second color resistor corresponds one-to-one with the green first color resistor, a portion of the green second color resistor corresponds one-to-one with the red first color resistor, and another portion of the green second color resistor corresponds one-to-one with the blue first color resistor.

[0034] In some embodiments, the third color resistor includes a red third color resistor, a green third color resistor, and a blue third color resistor.

[0035] The red third color resistor corresponds to the green second color resistor and the blue first color resistor, the green third color resistor corresponds to the blue second color resistor and the red first color resistor, and the blue third color resistor corresponds to the red second color resistor and the green first color resistor.

[0036] In some embodiments, the second color resist has at least one second opening.

[0037] The second opening corresponds one-to-one with the light-emitting element;

[0038] The first opening corresponds one-to-one with the light-emitting element;

[0039] The orthographic projection of the first opening on the substrate lies within the orthographic projection of the second opening on the substrate, and the opening area of ​​the first opening is smaller than the opening area of ​​the second opening.

[0040] In some embodiments, the first sublayer, the second sublayer, and the third sublayer are stacked sequentially along a direction away from the substrate;

[0041] The third color resist has a third opening.

[0042] The third opening corresponds one-to-one with the light-emitting element;

[0043] The orthographic projections of the second opening and the third opening on the substrate at least partially overlap.

[0044] In some embodiments, a planarization layer is further included, located on the side of the color filter layer opposite to the substrate, wherein the orthographic projection of the planarization layer on the substrate covers the color filter layer, and the surface of the side of the planarization layer opposite to the substrate is flush.

[0045] The planarization layer has scattering particles added to the region of the pixel-defining layer that does not overlap with the orthographic projection of the second color resist on the substrate; and / or, the planarization layer has scattering particles added to the region of the pixel-defining layer that does not overlap with the orthographic projection of the third color resist on the substrate.

[0046] In some embodiments, adjacent first color filters are mated together;

[0047] The adjacent second color resistors are connected to each other;

[0048] The adjacent third color resistors are connected to each other.

[0049] Secondly, embodiments of this disclosure also provide a display device, which includes the aforementioned display panel.

[0050] The display panel provided in this embodiment has a lower transmittance for visible light and a higher transmittance for infrared light in the overlapping area of ​​the orthographic projection of the second and first color resists. This can replace the black matrix in the color filter layer of related technologies, thereby not only enabling the color filter layer to reduce the reflectivity of the display panel to external light, but also improving the infrared transmittance of the display panel. In addition, the first and second sub-layers are stacked in sequence, which further ensures the flatness of the color filter layer compared to the color filter layer containing the black matrix in related technologies, and improves or eliminates the color separation phenomenon of the display panel when the screen is off.

[0051] The display device provided in this embodiment of the present disclosure, by employing the above-described display panel, can reduce the reflectivity of the display device to external light, improve the infrared light transmittance of the display device, and also improve or eliminate the color separation phenomenon of the display device when the screen is off. Attached Figure Description

[0052] The accompanying drawings are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the disclosure and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the detailed description of exemplary embodiments with reference to the accompanying drawings, in which:

[0053] Figure 1a is a cross-sectional view of the display panel along the DD' section line in Figure 1c, according to an embodiment of this disclosure.

[0054] Figure 1b is a schematic diagram of the distribution of the first color resist in the display panel of an embodiment of this disclosure.

[0055] Figure 1c is a schematic diagram of the distribution of the second color resist based on Figure 1b.

[0056] Figure 2a is a cross-sectional view of the display panel along the EE' section line in Figure 2b, according to an embodiment of this disclosure.

[0057] Figure 2b is a schematic diagram of another distribution of the second color resist based on Figure 1b.

[0058] Figure 3a is a cross-sectional view of the display panel along the FF' section line in Figure 3b in an embodiment of this disclosure.

[0059] Figure 3b is a schematic diagram of another distribution of the second color resist based on Figure 1b.

[0060] Figure 4 is a transmittance curve of the color filter layer in an embodiment of this disclosure.

[0061] Figure 5 is a partial cross-sectional view of another display panel in an embodiment of this disclosure.

[0062] Figure 6a is a cross-sectional view along the GG' section line in Figure 7a.

[0063] Figure 6b is a cross-sectional view along the HH' section line in Figure 7b.

[0064] Figure 6c is a cross-sectional view along section line II' in Figure 7c.

[0065] Figure 7a is a schematic diagram of the distribution of the third color resist based on Figure 1c.

[0066] Figure 7b is a schematic diagram of the distribution of the third color resist based on Figure 2b.

[0067] Figure 7c is a schematic diagram of the distribution of the third color resist based on Figure 3b.

[0068] Figure 8a is a partial cross-sectional view of another display panel in an embodiment of this disclosure.

[0069] Figure 8b is a top view of a touch layer in an embodiment of this disclosure.

[0070] Figure 8c is a partial cross-sectional view of another display panel in an embodiment of this disclosure. Detailed Implementation

[0071] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, a display panel and display device provided in the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0072] Embodiments of this disclosure will be described more fully below with reference to the accompanying drawings; however, the embodiments shown may be embodied in different forms and should not be construed as limited to the embodiments set forth in this disclosure. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure.

[0073] This disclosure is not limited to the embodiments shown in the accompanying drawings, but includes modifications to the configuration based on the manufacturing process. Therefore, the areas illustrated in the drawings are schematic, and the shapes of the areas shown illustrate specific shapes of the areas, but are not intended to be limiting.

[0074] In related technologies, COE (Color Filter on Encapsulation) technology involves creating a color filter layer above the encapsulation layer of an organic light-emitting diode (OLED) device. The color filter layer includes a black matrix (BM) and a color filter (CF). The color filter layer reduces the reflectivity of the OLED display panel to external light, thus replacing the circular polarizer originally placed on the display side of the OLED display panel.

[0075] However, the color filter layer in the related technology has low transmittance in the infrared band; and when preparing the color filter layer, since the black matrix is ​​prepared first and then the color resist is prepared, the color filter layer will be uneven; in addition, the color filter layer containing the black matrix has severe color separation when the display panel is off, that is, when the display panel is off and a flashlight is shone from its display side, light diffraction will occur at the opening in the black matrix used to accommodate the color resist.

[0076] To address the aforementioned problems in the related technologies, in a first aspect, embodiments of this disclosure provide a display panel. Referring to FIG1a, which is a cross-sectional view of the display panel along the DD' section line in FIG1c, the DD' section line in FIG1c only sections the display panel at the solid line positions, and does not section the display panel at the dashed line positions. FIG1b is a schematic diagram of the distribution of the first color resist in the display panel of this disclosure embodiment. FIG1c is a schematic diagram of one distribution of the second color resist based on FIG1b. FIG2a is a cross-sectional view of the display panel along the EE' section line in FIG2b, and FIG2b is another schematic diagram of the distribution of the second color resist based on FIG1b. FIG3a is a schematic diagram of... Figure 3b is a cross-sectional view of the display panel along the FF' section line in Figure 3b; Figure 3b is another distribution diagram of the second color resist based on Figure 1b; Figure 4 is a transmittance curve of the color filter layer in an embodiment of the present disclosure; Figure 5 is a partial structural cross-sectional view of another display panel in an embodiment of the present disclosure; Figure 6a is a cross-sectional view along the GG' section line in Figure 7a; the GG' section line in Figure 7a only cuts the display panel at the solid line position, and does not cut the display panel at the dashed line position; Figure 6b is a cross-sectional view along the HH' section line in Figure 7b; Figure 6c is a cross-sectional view along the II' section line in Figure 7c; Figure 7a is a distribution diagram of the third color resist based on Figure 1c; Figure 7b is a cross-sectional view of the third color resist based on Figure 1c; Figure 7b is a cross-sectional view of the third color resist based on Figure 1c; Figure 6a is a cross-sectional view of the third color resist based on Figure 1c; Figure 6 ... Figure 7a is a schematic diagram of the distribution of the third color resist based on Figure 2b; Figure 7c is a schematic diagram of the distribution of the third color resist based on Figure 3b; Figure 8a is a partial cross-sectional view of another display panel in an embodiment of the present disclosure; Figure 8b is a top view of a touch layer in an embodiment of the present disclosure; Figure 8c is a partial cross-sectional view of another display panel in an embodiment of the present disclosure; wherein, the display panel includes a substrate 1, a pixel defining layer 2 and a plurality of light-emitting elements 3, located on the same side of the substrate 1; the pixel defining layer 2 has a plurality of first openings 20, and the light-emitting elements 3 are located in the first openings 20; a color filter layer 4 is located on the side of the pixel defining layer 2 and the light-emitting elements 3 away from the substrate 1; the color filter layer 4 includes a first sublayer 41 and The second sublayer 42, the first sublayer 41, and the second sublayer 42 are stacked sequentially; the first sublayer 41 includes a plurality of first color resists 410 of different colors, the orthographic projection of the first color resists 410 on the substrate 1 covers the orthographic projection of the light-emitting element 3 on the substrate 1, and the first color resists 410 and the orthographic projection of the pixel defining layer 2 on the substrate 1 at least partially overlap; the second sublayer 42 includes a plurality of second color resists 420 of different colors, the second color resists 420 and the orthographic projection of the light-emitting element 3 on the substrate 1 do not overlap, the orthographic projection of the second color resists 420 on the substrate 1 overlaps with the overlapping area of ​​the first color resists 410 and the orthographic projection of the pixel defining layer 2 on the substrate 1, and the colors of the second color resists 420 and the first color resists 410 that overlap in the orthographic projection are different.

[0077] The orthographic projection of the second color resist 420 onto the substrate 1 lies within the overlapping area of ​​the orthographic projections of the first color resist 410 and the pixel defining layer 2 onto the substrate 1. The orthographic projections of the second color resist 420 and any light-emitting element 3 onto the substrate 1 do not overlap. Adjacent first color resists 410 are mated together. Due to manufacturing process errors, the adjacent positions of two adjacent first color resists 410 can slightly overlap or slightly be spaced apart; however, the arrangement of the first color resist 410 and the second color resist 420 can essentially replace the polarizer to improve or prevent the display panel from reflecting ambient light.

[0078] In this embodiment, referring to FIG4, the overlapping area of ​​the orthographic projection of the second color resist 420 and the first color resist 410 has a high transmittance of infrared light. It can replace the black matrix in the color filter layer of related technologies, thereby enabling the color filter layer 4 to not only reduce the reflectivity of the display panel to external light, but also improve the infrared light transmittance of the display panel. In addition, the first sub-layer 41 and the second sub-layer 42 are stacked in sequence, which can further ensure the flatness of the color filter layer 4 compared with the color filter layer containing the black matrix in related technologies, and at the same time improve or eliminate the color separation phenomenon of the display panel when the screen is off.

[0079] In some embodiments, referring to Figures 1a, 1b, and 1c, Figure 1a is a cross-sectional schematic diagram along the DD' section line in Figure 1c; a plurality of light-emitting elements 3 are arranged in an array; a plurality of first color resists 410 are arranged in an array; the plurality of first color resists 410 and the plurality of light-emitting elements 3 correspond one-to-one; each second color resist 420 corresponds to a column of first color resists 410, and the orthographic projection of each second color resist 420 on the substrate 1 is located within the orthographic projection of a column of first color resists 410 on the substrate 1; second color resists 420 of different colors are arranged alternately along the row direction X of the array.

[0080] In this configuration, four adjacent light-emitting elements 3 in both rows and columns constitute a pixel; the four adjacent light-emitting elements 3 in both rows and columns are arranged in a matrix; and four adjacent first color resists 410 in both rows and columns constitute a first color resist unit corresponding to the pixel. A second color resist 420 corresponds to the orthographic projection of a column of first color resists 410 onto the substrate 1.

[0081] In some embodiments, each second color resist 420 corresponds to a row of first color resist 410, and the orthographic projection of each second color resist 420 on the substrate 1 is located within the orthographic projection of a row of first color resist 410 on the substrate 1; second color resists 420 of different colors are arranged alternately along the column direction of the array.

[0082] In some embodiments, the arrangement of the light-emitting elements 3 in the pixel is not limited to the arrangement shown in FIG1b; correspondingly, the arrangement of the first color resist 410 in the first color resist unit is not limited to the arrangement shown in FIG1b; further correspondingly, the arrangement of the second color resist 420 is not limited to the arrangement shown in FIG1c.

[0083] In some embodiments, referring to Figures 2a, 2b, 3a and 3b, a plurality of light-emitting elements 3 are arranged in an array; a plurality of first color resists 410 are arranged in an array; the plurality of first color resists 410 and the plurality of light-emitting elements 3 correspond one-to-one; a plurality of second color resists 420 are arranged in an array; each second color resist 420 corresponds to one first color resist 410, and the orthographic projection of each second color resist 420 on the substrate 1 is located within the orthographic projection of one first color resist 410 on the substrate 1.

[0084] In this design, two adjacent second color resists 420 are connected to each other. Due to manufacturing process errors, the adjacent positions of the two adjacent second color resists 420 can overlap slightly or be slightly spaced apart. The adjacent positions of the two adjacent second color resists 420 and their corresponding adjacent first color resists 410 are directly projected onto the substrate 1.

[0085] In some embodiments, the distribution of the second color resist 420 in Figures 1c, 2b and 3b can be used simultaneously in the display panel. For example, the display area of ​​the display panel can be divided into multiple regions, and the distribution of the second color resist 420 in Figures 1c, 2b or 3b can be selected in each region. The distribution of the second color resist 420 in at least three regions is different from each other.

[0086] In some embodiments, referring to FIG1b, the first color resist 410 includes a red first color resist 410A, a green first color resist 410B, and a blue first color resist 410C. In the array of the first color resists 410, the green first color resist 410B and the blue first color resist 410C are arranged alternately in odd-numbered columns, and the red first color resist 410A and the green first color resist 410B are arranged alternately in even-numbered columns; or, the red first color resist 410A and the green first color resist 410B are arranged alternately in odd-numbered columns, and the green first color resist 410B and the blue first color resist 410C are arranged alternately in even-numbered columns.

[0087] In this arrangement, four adjacent light-emitting elements 3 in both rows and columns constitute one pixel; the four adjacent light-emitting elements 3 in both rows and columns are arranged in a matrix; one red first color resist 410A, one blue first color resist 410C, and two green first color resists 410B in both rows and columns correspond to the four light-emitting elements 3 in one pixel. One red first color resist 410A, one blue first color resist 410C, and two green first color resists 410B in both rows and columns are arranged in a matrix; the red first color resist 410A and the blue first color resist 410C are located in one diagonal position of the matrix, and the two green first color resists 410B are located in another diagonal position of the matrix.

[0088] In some embodiments, referring to Figures 1a and 1c, the second color resist 420 includes a red second color resist 420A and a blue second color resist 420C, wherein the red second color resist 420A corresponds to the first color resist 410 in the odd-numbered column and the blue second color resist 420C corresponds to the first color resist 410 in the even-numbered column; or, the red second color resist 420A corresponds to the first color resist 410 in the even-numbered column and the blue second color resist 420C corresponds to the first color resist 410 in the odd-numbered column.

[0089] In some embodiments, referring to Figures 2a and 2b, Figure 2a is a cross-sectional schematic diagram along the EE' section line in Figure 2b; the second color resist 420 includes a red second color resist 420A and a green second color resist 420B, the red second color resist 420A and the green first color resist 410B correspond one-to-one, a portion of the green second color resist 420B and the red first color resist 410A correspond one-to-one, and another portion of the green second color resist 420B and the blue first color resist 410C correspond one-to-one.

[0090] In some embodiments, the second color resist 420 includes a red second color resist 420A and a green second color resist 420B. A portion of the red second color resist 420A corresponds one-to-one with the green first color resist 410B, and the green second color resist 420B corresponds one-to-one with the red first color resist 410A. Another portion of the red second color resist 420A corresponds one-to-one with the blue first color resist 410C.

[0091] In some embodiments, the second color resist 420 may also include a red second color resist 420A and a blue second color resist 420C, with a portion of the red second color resist 420A corresponding one-to-one with the green first color resist 410B, and the blue second color resist 420C corresponding one-to-one with the red first color resist 410A, and another portion of the red second color resist 420A corresponding one-to-one with the blue first color resist 410C.

[0092] In some embodiments, the second color resist 420 may also include a red second color resist 420A and a blue second color resist 420C, with a portion of the blue second color resist 420C corresponding one-to-one with the green first color resist 410B; and another portion of the blue second color resist 420C corresponding one-to-one with the red first color resist 410A, and the red second color resist 420A corresponding one-to-one with the blue first color resist 410C.

[0093] In some embodiments, referring to Figures 3a and 3b, Figure 3a is a cross-sectional schematic diagram along the FF' section line in Figure 3b; the second color resist 420 includes a green second color resist 420B and a blue second color resist 420C, the blue second color resist 420C and the green first color resist 410B correspond one-to-one, a portion of the green second color resist 420B and the red first color resist 410A correspond one-to-one, and another portion of the green second color resist 420B and the blue first color resist 410C correspond one-to-one.

[0094] In some embodiments, the second color resist 420 includes a green second color resist 420B and a blue second color resist 420C. A portion of the blue second color resist 420C corresponds one-to-one with the green first color resist 410B, and another portion of the blue second color resist 420C corresponds one-to-one with the red first color resist 410A. The green second color resist 420B corresponds one-to-one with the blue first color resist 410C.

[0095] In some embodiments, referring to Figures 1c, 2b, and 3b, the second color resist 420 has at least one second opening Q, which corresponds one-to-one with the light-emitting element 3; the first opening 20 also corresponds one-to-one with the light-emitting element 3; the orthographic projection of the first opening 20 on the substrate 1 lies within the orthographic projection of the second opening Q on the substrate 1, and the opening area of ​​the first opening 20 is smaller than the opening area of ​​the second opening Q. This arrangement avoids the overlapping area of ​​the orthographic projections of the first color resist 410 and the second color resist 420 from obstructing the light-emitting area of ​​the light-emitting element 3, thereby ensuring the light-emitting angle range of the light-emitting element 3, such as ensuring that the light-emitting angle range of the light-emitting element 3 is within ±60°, and thus ensuring that the display viewing angle range of the display panel is met.

[0096] In some embodiments, referring to Figures 1a, 2a, and 3a, the distance s between the edges of the first opening 20 and the second opening Q projected onto the substrate 1 is in the range of 3 to 6 μm. This arrangement avoids the overlapping regions of the first and second color resists 410 and 420 projecting onto the light-emitting area of ​​the light-emitting element 3, thereby ensuring the light-emitting angle range of the light-emitting element 3.

[0097] In some embodiments, the orthographic projection shape of the first opening 20 on the substrate 1 includes a rectangle, a circle, an ellipse, an inverted ellipse, or a polygon; the orthographic projection shape of the second opening Q on the substrate 1 includes a rectangle, a circle, an ellipse, an inverted ellipse, or a polygon. An inverted ellipse refers to two opposite sides, one of which is a circle and the other is an ellipse.

[0098] In some embodiments, the orthographic projection shape of the first opening 20 and the second opening Q corresponding to the red first color resist 410A on the substrate 1 is circular; the orthographic projection shape of the first opening 20 and the second opening Q corresponding to the green first color resist 410B on the substrate 1 is circular; and the orthographic projection shape of the first opening 20 and the second opening Q corresponding to the blue first color resist 410C on the substrate 1 is an inverted ellipse. The inverted ellipses of the first opening 20 and the second opening Q corresponding to the blue first color resist 410C in four adjacent pixels in both rows and columns are oriented differently. This ensures that, on the one hand, the diffraction pattern of the light-emitting element 3 (i.e., the blue sub-pixel) corresponding to the blue first color resist 410C is circular, and on the other hand, the diffraction pattern of the entire pixel is circular, thereby making the pixel's diffraction pattern uniform and improving the display effect of the display panel.

[0099] In some embodiments, referring to FIG5, the display panel further includes a planarization layer 5 located on the side of the color filter layer 4 away from the substrate 1. The orthographic projection of the planarization layer 5 on the substrate 1 covers the color filter layer 4, and the surface of the side of the planarization layer 5 away from the substrate 1 is flush. Scattering particles 6 are added to the area of ​​the corresponding pixel defining layer 2 of the planarization layer 5 that does not overlap with the orthographic projection of the second color resist 420 on the substrate 1.

[0100] The surface plane of the planarization layer 5 facing away from the substrate 1 may not be completely flush. The addition of scattering particles 6 in the area where the corresponding pixel defining layer 2 of the planarization layer 5 does not overlap with the orthographic projection of the second color resist 420 on the substrate 1 can disperse the light reflected by the anode of the light-emitting element 3 when the display panel is not lit, thereby improving the color separation phenomenon of the display panel when the screen is off. When the display panel is lit, the light emitted by the light-emitting element 3 is dispersed by the scattering particles 6, which can increase the light emission angle of the light-emitting element 3, thereby increasing the display viewing angle of the display panel and improving the problem of brightness decay at a large viewing angle.

[0101] In some embodiments, while the scattering particles 6 are distributed in the area of ​​the corresponding pixel defining layer 2 of the planarization layer 5 that does not overlap with the orthographic projection of the second color resist 420 on the substrate 1, they can also be distributed in the area of ​​the corresponding light-emitting element 3 of the planarization layer 5. This can also increase the light emission angle of the light-emitting element 3, thereby increasing the display viewing angle of the display panel and improving the problem of brightness decay at a large viewing angle of the display panel.

[0102] In some embodiments, the material of the scattering particles 6 is gold foil, silver foil, aluminum foil, silicon dioxide, or titanium dioxide.

[0103] In some embodiments, referring to Figures 6a, 6b, and 6c, based on the above embodiments, the color filter layer 4 further includes a third sub-layer 43, which is stacked sequentially with the first sub-layer 41 and the second sub-layer 42; the third sub-layer 43 includes a plurality of third color resists 430 of different colors, the orthographic projections of the third color resists 430 and the light-emitting element 3 on the substrate 1 do not overlap, the orthographic projections of the third color resists 430 on the substrate 1 overlap with the overlapping area of ​​the orthographic projections of the first color resist 410 and the pixel defining layer 2 on the substrate 1, and the orthographic projections of the third color resists 430 and the second color resists 420 on the substrate 1 at least partially overlap; the colors of the orthographically overlapping third color resists 430, second color resists 420, and first color resists 410 are different.

[0104] The orthographic projection of the third color resist 430 on the substrate 1 lies within the overlapping area of ​​the orthographic projections of the first color resist 410 and the pixel defining layer 2 on the substrate 1. The orthographic projections of the third color resist 430 and any light-emitting element 3 on the substrate 1 do not overlap. Adjacent third color resists 430 are mated together; due to manufacturing process errors, the adjacent positions of adjacent third color resists 430 may slightly overlap or be slightly spaced. The orthographic projections of two adjacent third color resists 430 and their corresponding adjacent first color resists 410 on the substrate 1 coincide. The overlapping area of ​​the orthographic projections of the third color resist 430, the second color resist 420, and the first color resist 410 has low transmittance for visible light and high transmittance for infrared light. It can replace the black matrix in the color filter layer of related technologies, thereby enabling the color filter layer 4 to further reduce the reflectivity of the display panel to external light while ensuring the infrared transmittance of the display panel.

[0105] In some embodiments, referring to Figures 6a-6c and 7a-7c, based on the above embodiments, a plurality of third color resists 430 are arranged in an array; each third color resist 430 corresponds to a first color resist 410, and the orthographic projection of each third color resist 430 on the substrate 1 is located within the orthographic projection of a first color resist 410 on the substrate 1.

[0106] Here, four adjacent third color resists 430 in both rows and columns constitute a third color resist unit corresponding to a pixel. Four adjacent third color resists 430 in both rows and columns constitute a third color resist unit corresponding to a first color resist unit.

[0107] In some embodiments, referring to Figures 6a-6c and 7a-7c, Figure 6a is a cross-sectional view along the GG' section line in Figure 7a; Figure 6b is a cross-sectional view along the HH' section line in Figure 7b; Figure 6c is a cross-sectional view along the II' section line in Figure 7c; based on the above embodiments, the third color resist 430 includes a red third color resist 430A, a green third color resist 430B, and a blue third color resist 430C. The red third color resist 430A corresponds to the green second color resist 420B and the blue first color resist 410C, the green third color resist 430B corresponds to the blue second color resist 420C and the red first color resist 410A, and the blue third color resist 430C corresponds to the red second color resist 420A and the green first color resist 410B.

[0108] In this arrangement, one red third color resist 430A, one blue third color resist 430C, and two green third color resists 430B, which are adjacent in both rows and columns, correspond to the four light-emitting elements 3 in one pixel. The red third color resist 430A, one blue third color resist 430C, and two green third color resists 430B, which are adjacent in both rows and columns, are arranged in a matrix; the red third color resist 430A and the blue third color resist 430C are located in one diagonal position of the matrix, and the two green third color resists 430B are located in the other diagonal position of the matrix.

[0109] In some embodiments, the distribution of the third color resist 430 in Figures 7a, 7b and 7c can be used simultaneously in the display panel. For example, the display area of ​​the display panel can be divided into multiple regions, and the distribution of the third color resist 430 in Figures 7a, 7b or 7c can be selected in each region. The distribution of the third color resist 430 in at least three regions is different from each other.

[0110] In some embodiments, referring to Figures 7a-7c, the first sublayer 41, the second sublayer 42, and the third sublayer 43 are stacked sequentially in a direction away from the substrate 1; a third opening P is provided in the third color resist 430, and the third opening P corresponds one-to-one with the light-emitting element 3; the orthographic projections of the second opening Q and the third opening P on the substrate 1 at least partially overlap.

[0111] In some embodiments, the orthographic projection of the second opening Q on the substrate 1 lies within the orthographic projection of the third opening P on the substrate 1, and the opening area of ​​the second opening Q is less than or equal to the opening area of ​​the third opening P. This configuration avoids the overlapping areas of the orthographic projections of the first color resist 410, the second color resist 420, and the third color resist 430 from obstructing the light-emitting area of ​​the light-emitting element 3, thereby ensuring the light-emitting angle range of the light-emitting element 3.

[0112] In some embodiments, the orthographic projection shape of the third opening P on the substrate 1 includes a rectangle, a circle, an ellipse, an inverted ellipse, or a polygon.

[0113] In some embodiments, the orthographic projection shapes of the first opening 20, second opening Q, and third opening P corresponding to the red first color resist 410A on the substrate 1 are circular; the orthographic projection shapes of the first opening 20, second opening Q, and third opening P corresponding to the green first color resist 410B on the substrate 1 are circular; and the orthographic projection shapes of the first opening 20, second opening Q, and third opening P corresponding to the blue first color resist 410C on the substrate 1 are inverted ellipses. The inverted ellipses of the first opening 20, second opening Q, and third opening P corresponding to the blue first color resist 410C in four adjacent pixels (row and column adjacent) have different directions. This ensures that the diffraction pattern of the light-emitting element 3 (i.e., the blue sub-pixel) corresponding to the blue first color resist 410C is circular, and also that the diffraction pattern of the entire pixel is circular, thereby making the pixel diffraction pattern uniform and improving the display effect of the display panel.

[0114] In some embodiments, referring to FIG8, based on the panel structure shown in FIG5, scattering particles 6 are added to the area where the corresponding pixel defining layer 2 of the planarization layer 5 does not overlap with the orthographic projection of the third color resist 430 on the substrate 1.

[0115] The addition of scattering particles 6 in the area where the corresponding pixel defining layer 2 of the planarization layer 5 and the orthogonal projection of the second color resist 420 on the substrate 1 do not overlap, and the addition of scattering particles 6 in the area where the corresponding pixel defining layer 2 of the planarization layer 5 and the orthogonal projection of the third color resist 430 on the substrate 1 do not overlap, allows the light reflected by the anode of the light-emitting element 3 to be scattered by the scattering particles 6 when the display panel is not lit, thereby improving the color separation phenomenon of the display panel when the screen is off; when the display panel is lit, the light emitted by the light-emitting element 3 is scattered by the scattering particles 6, which can increase the light emission angle of the light-emitting element 3, thereby increasing the display viewing angle of the display panel, and thus improving the problem of brightness decay at a large viewing angle of the display panel.

[0116] In some embodiments, referring to Figures 1b, 1c, 2b, 3b and 7a-7c, the orthographic projection shape of the first color resist 410 on the substrate 1 includes a rectangle, a circle or a polygon; the orthographic projection shape of the second color resist 420 on the substrate 1 includes a rectangle, a strip, a circle or a polygon; and the orthographic projection shape of the third color resist 430 on the substrate 1 includes a rectangle, a circle or a polygon.

[0117] In some embodiments, the thickness of the first sublayer 41 ranges from 1.5 to 5 μm; the total thickness of the second sublayer 42 and the third sublayer 43 ranges from 1 to 4 μm.

[0118] In some embodiments, the thickness of the first color resist 410 of different colors in the first sublayer 41 may be different; the thickness of the second color resist 420 of different colors in the second sublayer 42 may be different; and the thickness of the third color resist 430 of different colors in the third sublayer 43 may be different.

[0119] In some embodiments, adjacent first color resists 410 are mated together; adjacent second color resists 420 are mated together; and adjacent third color resists 430 are mated together.

[0120] In some embodiments, the light-emitting element 3 includes an organic light-emitting element (OLED), a stacked organic light-emitting element (Tandom OLED), a quantum dot organic light-emitting element (QDOLED), a light-emitting diode (LED), a micro-LED (including mini-LED or micro-LED), or an LCD (Liquid Crystal Display).

[0121] In some embodiments, the display panel may further include a color conversion layer, wherein all light-emitting elements 3 may emit the same color, for example, all light-emitting elements 3 emit blue light; or, for example, all light-emitting elements 3 emit white light. The color conversion layer may include quantum dot layers (QD films) of different colors, such as a red quantum dot layer, a green quantum dot layer, and a white resin layer; for example, blue light emitted by the light-emitting element 3 is emitted as red light after passing through the red quantum dot layer, as green light after passing through the green quantum dot layer, and as blue light after passing through the white resin layer.

[0122] In some embodiments, referring to Figures 1a, 2a, 3a, 6a-6c, 5, and 8a, the display panel further includes an encapsulation layer 7 and a touch layer 8, located between the color filter layer 4 and the light-emitting element 3, and the encapsulation layer 7 and the touch layer 8 are stacked sequentially in a direction away from the substrate 1. The encapsulation layer 7 is used to encapsulate the light-emitting element 3; the touch layer 8 enables touch control of the display panel.

[0123] In some embodiments, referring to Figures 8b and 8c, the touch layer 8 includes a first electrode layer 81 and a second electrode layer 82. The first electrode layer 81 includes a plurality of driving electrode strips 810 and a plurality of sensing electrode blocks 811. The plurality of driving electrode strips 810 are arranged sequentially along a first direction Y. The plurality of sensing electrode blocks 811 are arranged in an array. The second electrode layer 82 includes a plurality of bridging portions 820, which are arranged in an array. The plurality of sensing electrode blocks 811 located in the same column are connected by the plurality of bridging portions 820 located in the same column to form a sensing electrode strip. Multiple columns of sensing electrode blocks 811 and multiple columns of bridging portions 820 are connected one-to-one to form a plurality of sensing electrode strips. The plurality of sensing electrode strips are arranged sequentially along a second direction X. The first direction Y and the second direction X intersect.

[0124] In some embodiments, referring to Figures 8b and 8c, the second electrode layer 82 and the first electrode layer 81 are stacked sequentially in a direction away from the encapsulation layer 7, and a first insulating layer 9 is disposed between the second electrode layer 82 and the first electrode layer 81; the display panel also includes an organic insulating layer 10 disposed between the first electrode layer 81 and the color filter layer 4, and an impedance layer 11 disposed between the second electrode layer 82 and the encapsulation layer 7. The orthographic projections of the second electrode layer 82 and the first electrode layer 81 on the substrate 1 do not overlap with the orthographic projection of the light-emitting element 3 on the substrate, thereby preventing the touch layer 8 from blocking the light emitted by the light-emitting element 3.

[0125] The display panel provided in this embodiment has a higher transmittance of infrared light due to the overlapping area of ​​the orthographic projection of the second color resist and the first color resist. This can replace the black matrix in the color filter layer of related technologies, thereby not only enabling the color filter layer to reduce the reflectivity of the display panel to external light, but also improving the infrared light transmittance of the display panel. In addition, the first sub-layer and the second sub-layer are stacked in sequence, which can further ensure the flatness of the color filter layer compared to the color filter layer containing the black matrix in related technologies, and at the same time improve or eliminate the color separation phenomenon of the display panel when the screen is off.

[0126] Secondly, embodiments of this disclosure also provide a display device, including the display panel described in the above embodiments.

[0127] By using the display panel in the above embodiments, the reflectivity of the display device to external light can be reduced, the infrared light transmittance of the display device can be increased, and the color separation phenomenon of the display device when the screen is off can be improved or eliminated.

[0128] The display device provided in this disclosure can be any product or component with display function, such as an OLED panel, a Tandom OLED panel, a QDOLED panel, an OLED TV, an OLED billboard, a monitor, a mobile phone, or a navigator.

[0129] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A display panel, wherein, Including substrate, A pixel defining layer and multiple light-emitting elements are located on the same side of the substrate; The pixel defining layer has multiple first openings, and the light-emitting element is located in the first opening; A color filter layer is located on the side of the pixel defining layer and the light-emitting element that is away from the substrate; The color filter layer includes a first sub-layer and a second sub-layer, which are stacked sequentially. The first sub-layer includes a plurality of first color resists of different colors, the orthographic projection of the first color resists on the substrate covers the orthographic projection of the light-emitting element on the substrate, and the orthographic projections of the first color resists and the pixel defining layer on the substrate at least partially overlap; The second sub-layer includes multiple second color resists of different colors. The orthographic projections of the second color resists and the light-emitting element on the substrate do not overlap. The orthographic projections of the second color resists on the substrate overlap with the orthographic projections of the first color resist and the pixel defining layer on the substrate, and the colors of the second color resists and the first color resists in the overlapping orthographic projection area are different.

2. The display panel of claim 1, wherein, The color filter layer further includes a third sub-layer, which is stacked sequentially with the first sub-layer and the second sub-layer; The third sub-layer includes multiple third color resists of different colors. The orthographic projections of the third color resists and the light-emitting element on the substrate do not overlap. The orthographic projections of the third color resists on the substrate overlap with the orthographic projections of the first color resist and the pixel defining layer on the substrate. The orthographic projections of the third color resists and the second color resist on the substrate at least partially overlap. The third, second, and first color resists, when projected onto each other, have different colors.

3. The display panel of claim 2, wherein, The multiple light-emitting elements are arranged in an array; Multiple first color resists are arranged in an array; Each of the first color resists and the multiple light-emitting elements corresponds one-to-one; Each second color resist corresponds to a column of first color resists, and the orthographic projection of each second color resist on the substrate lies within the orthographic projection of a column of first color resists on the substrate; The second color resists of different colors are arranged alternately along the row direction of the array.

4. The display panel of claim 2, wherein, The multiple light-emitting elements are arranged in an array; Multiple first color resists are arranged in an array; Each of the first color resists and the multiple light-emitting elements corresponds one-to-one; Multiple second-color resists are arranged in an array; Each second color resist corresponds to one first color resist, and the orthographic projection of each second color resist on the substrate lies within the orthographic projection of one first color resist on the substrate.

5. The display panel of claim 3 or 4, wherein, Multiple third color filters are arranged in an array; Each of the third color resists corresponds to one of the first color resists, and the orthographic projection of each of the third color resists on the substrate lies within the orthographic projection of one of the first color resists on the substrate.

6. The display panel of claim 5, wherein, The first color resist includes a red first color resist, a green first color resist, and a blue first color resist. In the array of the first color resists, the green first color resist and the blue first color resist are arranged alternately in odd-numbered columns, and the red first color resist and the green first color resist are arranged alternately in even-numbered columns; or, the red first color resist and the green first color resist are arranged alternately in odd-numbered columns, and the green first color resist and the blue first color resist are arranged alternately in even-numbered columns.

7. The display panel of claim 6, wherein, The second color resist includes a red second color resist and a blue second color resist. The red second color resistor corresponds to the first color resistor in the odd-numbered column, and the blue second color resistor corresponds to the first color resistor in the even-numbered column; Alternatively, the red second color resistor corresponds to the first color resistor in the even-numbered column, and the blue second color resistor corresponds to the first color resistor in the odd-numbered column.

8. The display panel of claim 6, wherein, The second color resistor includes a red second color resistor and a green second color resistor. The red second color resistor corresponds one-to-one with the green first color resistor, a portion of the green second color resistor corresponds one-to-one with the red first color resistor, and another portion of the green second color resistor corresponds one-to-one with the blue first color resistor.

9. The display panel of claim 6, wherein, The second color resist includes a green second color resist and a blue second color resist. The blue second color resistor corresponds one-to-one with the green first color resistor, a portion of the green second color resistor corresponds one-to-one with the red first color resistor, and another portion of the green second color resistor corresponds one-to-one with the blue first color resistor.

10. The display panel of any of claims 7-9, wherein, The third color resistor includes a red third color resistor, a green third color resistor, and a blue third color resistor. The red third color resistor corresponds to the green second color resistor and the blue first color resistor, the green third color resistor corresponds to the blue second color resistor and the red first color resistor, and the blue third color resistor corresponds to the red second color resistor and the green first color resistor.

11. The display panel of any of claims 7-9, wherein, The second color resist has at least one second opening. The second opening corresponds one-to-one with the light-emitting element; The first opening corresponds one-to-one with the light-emitting element; The orthographic projection of the first opening on the substrate lies within the orthographic projection of the second opening on the substrate, and the opening area of ​​the first opening is smaller than the opening area of ​​the second opening.

12. The display panel of claim 11, wherein, The first sublayer, the second sublayer, and the third sublayer are stacked sequentially in a direction away from the substrate; The third color resist has a third opening. The third opening corresponds one-to-one with the light-emitting element; The orthographic projections of the second opening and the third opening on the substrate at least partially overlap.

13. The display panel of claim 12, wherein, It also includes a planarization layer located on the side of the color filter layer opposite to the substrate, the orthographic projection of the planarization layer on the substrate covering the color filter layer, and the surface of the side of the planarization layer opposite to the substrate being flush. The planarization layer has scattering particles added to the region of the pixel-defining layer that does not overlap with the orthographic projection of the second color resist on the substrate; and / or, the planarization layer has scattering particles added to the region of the pixel-defining layer that does not overlap with the orthographic projection of the third color resist on the substrate.

14. The display panel of claim 2, wherein, The adjacent first color resistors are connected to each other; The adjacent second color resistors are connected to each other; The adjacent third color resistors are connected to each other.

15. A display device, wherein, Includes the display panel as described in any one of claims 1-14.

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