Display panel and display device

Abstract

A display panel is provided. The display panel includes a plurality of first pixels, a plurality of second pixels, a first black matrix, and a second black matrix. The first black matrix is disposed at least partially in a region having the plurality of first pixels and a region having the plurality of second pixels. The second black matrix is disposed at least partially in the region having the plurality of second pixels and is not disposed at least partially in the region having the plurality of first pixels.

Description

TECHNICAL FIELD

[0001] The present application relates to display technology, and in particular, to a display panel and a display device. BACKGROUND

[0002] Display devices such as mobile phones have been developed to provide many functions. Users can use display devices to access various private information. For example, users can use display devices to access bank accounts, pay bills, make online purchases, and access various password-protected websites. These types of personal information are private and are often subject to identity theft and privacy invasion. Therefore, in recent years, privacy protection has become the focus of research and development in display technology. SUMMARY

[0003] In one aspect, the present disclosure provides a display panel, comprising: a plurality of first pixels; a plurality of second pixels; a first black matrix; and a second black matrix; wherein the first black matrix is at least partially disposed in a region having the plurality of first pixels and a region having the plurality of second pixels; and the second black matrix is at least partially disposed in the region having the plurality of second pixels and is at least partially not disposed in the region having the plurality of first pixels.

[0004] Optionally, the second black matrix is substantially not disposed in the region having the plurality of first pixels; a normal projection of the first black matrix on a substrate and a normal projection of the second black matrix on the substrate are substantially not overlapped in the region having the plurality of first pixels; and the normal projection of the first black matrix on the substrate and the normal projection of the second black matrix on the substrate are at least partially overlapped in the region having the plurality of second pixels.

[0005] Optionally, the second black matrix comprises a plurality of bars; the display panel comprises a plurality of slits; the plurality of bars and the plurality of slits are arranged alternately; two adjacent bars in the plurality of bars are spaced apart by a slit in the plurality of slits; and two adjacent slits in the plurality of slits are spaced apart by a bar in the plurality of bars.

[0006] Optionally, the display panel further comprises a pixel defining layer, the pixel defining layer defines a plurality of first sub-pixel openings in the area with the plurality of first pixels, and defines a plurality of second sub-pixel openings in the area with the plurality of second pixels; wherein in the area with the plurality of first pixels, a portion of the first black matrix between two adjacent sub-pixels has a first width along a plane intersecting the two adjacent sub-pixels and the portion of the first black matrix and perpendicular to a surface of a substrate, a portion of the pixel defining layer between the same two adjacent sub-pixels has a second width along a plane intersecting the two adjacent sub-pixels and the portion of the pixel defining layer and perpendicular to the surface of the substrate, the second width is greater than the first width; and in the area with the plurality of second pixels, a portion of the first black matrix between two adjacent sub-pixels has a third width along a plane intersecting the two adjacent sub-pixels and the portion of the first black matrix and perpendicular to a surface of a substrate, a portion of the pixel defining layer between the same two adjacent sub-pixels has a fifth width along a plane intersecting the two adjacent sub-pixels and the portion of the pixel defining layer and perpendicular to the surface of the substrate, the third width is substantially the same as the fifth width.

[0007] Optionally, in the area with the plurality of second pixels, a portion of the second black matrix between the same two adjacent sub-pixels has a fourth width along a plane intersecting the two adjacent sub-pixels and the portion of the second black matrix and perpendicular to the surface of the substrate; and the fourth width is greater than the fifth width.

[0008] Optionally, in the area with the plurality of second pixels, a portion of the second black matrix between the same two adjacent sub-pixels has a fourth width along a plane intersecting the two adjacent sub-pixels and the portion of the second black matrix and perpendicular to the surface of the substrate; and the fourth width is substantially the same as the fifth width.

[0009] Optionally, the display panel includes: a plurality of first openings extending through the first black matrix; a plurality of second openings extending through the first black matrix; and a plurality of third openings extending through the second black matrix; the plurality of first openings are configured to allow light emitted from a plurality of first light emitting elements in a plurality of first sub-pixels to transmit therethrough; the plurality of second openings are configured to allow light emitted from a plurality of second light emitting elements in a plurality of second sub-pixels to transmit therethrough; and the plurality of third openings are configured to allow light emitted from a plurality of second light emitting elements in the plurality of second sub-pixels to transmit therethrough; wherein, in a portion of the display panel having the plurality of second pixels, a second opening of the plurality of second openings configured to allow light emitted from a second light emitting element to transmit therethrough has a first opening width along a plane intersecting two adjacent second sub-pixels and perpendicular to a surface of a substrate, and a third opening of the plurality of third openings configured to allow light emitted from the same second light emitting element to transmit therethrough has a second opening width along the plane intersecting the two adjacent second sub-pixels and perpendicular to the surface of the substrate.

[0010] Optionally, the first opening width is greater than the second opening width.

[0011] Optionally, a normal projection of an edge of the second opening on a substrate substantially surrounds a normal projection of an edge of the third opening on the substrate.

[0012] Optionally, the first opening width and the second opening width are substantially the same.

[0013] Optionally, a normal projection of an edge of the second opening on a substrate substantially overlaps a normal projection of an edge of the third opening on the substrate.

[0014] Optionally, in the region having the plurality of second pixels, the display panel further includes: an insulating layer spacing apart the first black matrix and the second black matrix; and a light control structure extending at least partially through the insulating layer; wherein the light control structure is connected to a portion of the first black matrix and connected to a portion of the second black matrix.

[0015] Optionally, the second black matrix includes a plurality of sub-layers; two adjacent sub-layers of the plurality of sub-layers are spaced apart by an insulating layer; and normal projections of the plurality of sub-layers on a substrate substantially overlap each other.

[0016] Optionally, the display panel further includes a lens layer including a plurality of lenses; wherein, in the region having the plurality of second pixels, a normal projection of each lens of the plurality of lenses on a substrate at least partially overlaps a normal projection of a second light emitting element on the substrate.

[0017] Optionally, the display panel comprises: a first encapsulation layer; the plurality of lenses and the first black matrix are located on the first encapsulation layer; a second encapsulation layer is located on a side of the plurality of lenses and the first black matrix away from the first encapsulation layer; and the second black matrix is located on a side of the second encapsulation layer away from the plurality of lenses and the first black matrix.

[0018] Optionally, the display panel comprises: a first encapsulation layer; the first black matrix is located on the first encapsulation layer; a second encapsulation layer is located on a side of the first black matrix away from the first encapsulation layer; and the plurality of lenses and the second black matrix are located on a side of the second encapsulation layer away from the first black matrix.

[0019] Optionally, the display panel comprises: a first encapsulation layer; the first black matrix is located on the first encapsulation layer; a second encapsulation layer is located on a side of the first black matrix away from the first encapsulation layer; and the second black matrix is located on a side of the second encapsulation layer away from the first black matrix; a third encapsulation layer is located on a side of the second black matrix away from the second encapsulation layer; and the plurality of lenses are located on a side of the third encapsulation layer away from the second black matrix.

[0020] Optionally, the display panel comprises a plurality of first pixel rows and a plurality of second pixel rows arranged alternately; two adjacent first pixel rows in the plurality of first pixel rows are spaced apart by a separate second pixel row in the plurality of second pixel rows; two adjacent second pixel rows in the plurality of second pixel rows are spaced apart by a separate first pixel row in the plurality of first pixel rows; each first pixel row in the plurality of first pixel rows comprises a plurality of pixels in the plurality of first pixels; each second pixel row in the plurality of second pixel rows comprises a plurality of second pixels in the plurality of second pixels; each first pixel in the plurality of first pixels comprises a first sub-pixel, a second sub-pixel, and a third sub-pixel; and each second pixel in the plurality of second pixels comprises a plurality of fourth sub-pixels, a plurality of fifth sub-pixels, and a plurality of sixth sub-pixels.

[0021] In another aspect, the present disclosure provides a display panel comprising: a plurality of first pixels; a plurality of second pixels; a first black matrix; and a second black matrix; wherein, in a region having the plurality of first pixels, a positive projection of the first black matrix on a substrate substrate substantially does not overlap with a positive projection of the second black matrix on the substrate substrate; and in a region having the plurality of second pixels, the positive projection of the first black matrix on the substrate substrate at least partially overlaps with the positive projection of the second black matrix on the substrate substrate.

[0022] In another aspect, the present disclosure provides a display device including the display panel described herein, and one or more integrated circuits connected to the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0023] According to various disclosed embodiments, the following drawings are merely examples for illustrative purposes and are not intended to limit the scope of the present disclosure.

[0024] Figure 1 is a schematic diagram illustrating a pixel arrangement of a display panel in some embodiments according to the present disclosure.

[0025] Figure 2 shows a structure of a portion of a display panel in some embodiments according to the present disclosure.

[0026] Figure 3 is a schematic diagram illustrating a pixel arrangement of a display panel in some embodiments according to the present disclosure.

[0027] Figure 4 is a schematic diagram illustrating a pixel arrangement of a display panel in some embodiments according to the present disclosure.

[0028] Figure 5 is a schematic diagram illustrating a pixel arrangement of a display panel in some embodiments according to the present disclosure.

[0029] Figure 6 is a schematic diagram illustrating a pixel arrangement of a display panel in some embodiments according to the present disclosure.

[0030] Figure 7 is a cross-sectional view of a plurality of first pixels in a portion of a display panel in some embodiments according to the present disclosure.

[0031] Figure 8 is a cross-sectional view of a plurality of second pixels in a portion of a display panel in some embodiments according to the present disclosure.

[0032] Figure 9 is a plan view of a first black matrix in some embodiments according to the present disclosure.

[0033] Figure 10 is a plan view of a second black matrix in some embodiments according to the present disclosure.

[0034] Figure 11 is a superposition of a first black matrix and a second black matrix in some embodiments according to the present disclosure.

[0035] Figure 12 is a cross-sectional view of a plurality of first pixels in a portion of a display panel in some embodiments according to the present disclosure.

[0036] Figure 13 is a cross-sectional view of a plurality of second pixels in a portion of a display panel in some embodiments of the disclosure.

[0037] Figure 14 is a plan view of a first black matrix in some embodiments of the disclosure.

[0038] Figure 15 is a plan view of a second black matrix in some embodiments of the disclosure.

[0039] Figure 16 is a superimposition of the first black matrix and the second black matrix in some embodiments of the disclosure.

[0040] Figure 17 is a cross-sectional view of a plurality of first pixels in a portion of a display panel in some embodiments of the disclosure.

[0041] Figure 18 is a cross-sectional view of a plurality of second pixels in a portion of a display panel in some embodiments of the disclosure.

[0042] Figure 19 is a plan view of a first black matrix in some embodiments of the disclosure.

[0043] Figure 20 is a plan view of a second black matrix in some embodiments of the disclosure.

[0044] Figure 21 is a superimposition of the first black matrix and the second black matrix in some embodiments of the disclosure.

[0045] Figure 22 is a cross-sectional view of a plurality of first pixels in a portion of a display panel in some embodiments of the disclosure.

[0046] Figure 23 is a cross-sectional view of a plurality of second pixels in a portion of a display panel in some embodiments of the disclosure.

[0047] Figure 24 is a cross-sectional view of a plurality of second pixels in a portion of a display panel in alternative embodiments of the disclosure.

[0048] Figure 25 is a plan view of a first black matrix in some embodiments of the disclosure.

[0049] Figure 26 is a plan view of a second black matrix in some embodiments of the disclosure.

[0050] Figure 27 is a superimposition of the first black matrix and the second black matrix in some embodiments of the disclosure.

[0051] Figure 28 Various parameters in a display panel in accordance with some embodiments of the present disclosure are shown.

[0052] Figure 29 Correlation between luminance decay and viewing angle in accordance with some embodiments of the present disclosure is shown.

[0053] Figure 30 is a cross-sectional view of a plurality of second pixels in a portion of a display panel in accordance with some embodiments of the present disclosure.

[0054] Figure 31 is a cross-sectional view of a plurality of second pixels in a portion of a display panel in accordance with some embodiments of the present disclosure.

[0055] Figure 32 is a cross-sectional view of a plurality of second pixels in a portion of a display panel in accordance with some embodiments of the present disclosure.

[0056] Figure 33 Various parameters in a display panel in accordance with some embodiments of the present disclosure are shown.

[0057] Figure 34 Various parameters in a display panel in accordance with some embodiments of the present disclosure are shown.

[0058] Figure 35 Various parameters in a display panel in accordance with some embodiments of the present disclosure are shown.

[0059] Figure 36 Various parameters in a display panel in accordance with some embodiments of the present disclosure are shown.

[0060] Figure 37 Correlation between luminance decay and viewing angle in accordance with some embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0061] The present disclosure will now be described in greater detail in relation to the following embodiments. It should be noted that the following description of some embodiments presented herein is merely intended to be illustrative and descriptive, and is not exhaustive or limited to the precise form disclosed.

[0062] The present disclosure provides, among other things, a display panel and a display device that substantially obviate one or more problems due to limitations and disadvantages of the related art. In one aspect, the present disclosure provides a display panel. In some embodiments, the display panel includes a plurality of first pixels, a plurality of second pixels, a first black matrix, and a second black matrix. Optionally, the first black matrix is disposed at least partially in a region having the plurality of first pixels and a region having the plurality of second pixels. Optionally, the second black matrix is disposed at least partially in the region having the plurality of second pixels and at least partially not disposed in the region having the plurality of first pixels. Optionally, the second black matrix is disposed in the region having the plurality of second pixels and not disposed in the region having the plurality of first pixels.

[0063] Figure 1 FIG. 1 is a schematic diagram illustrating a pixel arrangement of a display panel in accordance with some embodiments of the present disclosure. Referring to FIG. 1, a display panel 100 includes a plurality of first pixel rows PR1 and a plurality of second pixel rows PR2. The plurality of first pixel rows PR1 and the plurality of second pixel rows PR2 are arranged alternately. Two adjacent first pixel rows in the plurality of first pixel rows PR1 are spaced apart by a single second pixel row in the plurality of second pixel rows PR2. Two adjacent second pixel rows in the plurality of second pixel rows PR2 are spaced apart by a single first pixel row in the plurality of first pixel rows PR1. Figure 1 In some embodiments, the display panel includes a plurality of first pixel rows PR1 and a plurality of second pixel rows PR2. Optionally, in some embodiments, the display panel includes a plurality of first pixel rows PR1 and a plurality of second pixel rows PR2 arranged alternately. Optionally, two adjacent first pixel rows in the plurality of first pixel rows PR1 are spaced apart by a single second pixel row in the plurality of second pixel rows PR2. Two adjacent second pixel rows in the plurality of second pixel rows PR2 are spaced apart by a single first pixel row in the plurality of first pixel rows PR1.

[0064] In some embodiments, each first pixel row in the plurality of first pixel rows PR1 includes a plurality of first pixels px arranged in sequence. Each second pixel row in the plurality of second pixel rows PR2 includes a plurality of second pixels px’ arranged in sequence. Figure 2 FIG. 2 is a schematic diagram illustrating a structure of a portion of a display panel in accordance with some embodiments of the present disclosure. Referring to FIG. 2, a display panel 200 includes a plurality of first pixel rows PR1 and a plurality of second pixel rows PR2. The plurality of first pixel rows PR1 and the plurality of second pixel rows PR2 are arranged alternately. Two adjacent first pixel rows in the plurality of first pixel rows PR1 are spaced apart by a single second pixel row in the plurality of second pixel rows PR2. Two adjacent second pixel rows in the plurality of second pixel rows PR2 are spaced apart by a single first pixel row in the plurality of first pixel rows PR1. Figure 1 In some embodiments, each first pixel in the plurality of first pixels px includes a first sub-pixel sp1, a second sub-pixel sp2, and a third sub-pixel sp3. In some embodiments, each second pixel in the plurality of second pixels px’ includes one or more fourth sub-pixels, one or more fifth sub-pixels, and one or more sixth sub-pixels. In some embodiments, the one or more fourth sub-pixels, the one or more fifth sub-pixels, and the one or more sixth sub-pixels are arranged in sequence. Figure 2 In some embodiments, each first pixel in the plurality of first pixels px includes a first sub-pixel sp1, a second sub-pixel sp2, and a third sub-pixel sp3. In some embodiments, each second pixel in the plurality of second pixels px’ includes one or more fourth sub-pixels, one or more fifth sub-pixels, and one or more sixth sub-pixels. In some embodiments, the one or more fourth sub-pixels, the one or more fifth sub-pixels, and the one or more sixth sub-pixels are arranged in sequence. Figure 1 In some embodiments, each first pixel in the plurality of first pixels px includes a first sub-pixel sp1, a second sub-pixel sp2, and a third sub-pixel sp3. In some embodiments, each second pixel in the plurality of second pixels px’ includes one or more fourth sub-pixels, one or more fifth sub-pixels, and one or more sixth sub-pixels. In some embodiments, the one or more fourth sub-pixels, the one or more fifth sub-pixels, and the one or more sixth sub-pixels are arranged in sequence. Figure 2 In some embodiments, each first pixel in the plurality of first pixels px includes a first sub-pixel sp1, a second sub-pixel sp2, and a third sub-pixel sp3. In some embodiments, each second pixel in the plurality of second pixels px’ includes one or more fourth sub-pixels, one or more fifth sub-pixels, and one or more sixth sub-pixels. In some embodiments, the one or more fourth sub-pixels, the one or more fifth sub-pixels, and the one or more sixth sub-pixels are arranged in sequence.

[0065] In alternative examples, each second pixel includes a single fourth sub-pixel, a single fifth sub-pixel, and a single sixth sub-pixel.

[0066] In alternative examples, each second pixel includes a single fourth sub-pixel, a plurality of fifth sub-pixels (e.g., sp2’-1 and sp2’-2), and a plurality of sixth sub-pixels (e.g., sp3’-1 and sp3’-2).

[0067] In alternative examples, each second pixel includes a single fourth sub-pixel, a plurality of fifth sub-pixels (e.g., sp2’-1 and sp2’-2), and a plurality of sixth sub-pixels (e.g., sp3’-1 and sp3’-2).

[0068] In alternative examples, each second pixel includes a single fourth sub-pixel, a plurality of fifth sub-pixels (e.g., sp2’-1 and sp2’-2), and a plurality of sixth sub-pixels (e.g., sp3’-1 and sp3’-2).

[0069] In some embodiments, the first sub-pixel sp1 and the plurality of fourth sub-pixels are sub-pixels of a first color (e.g., red). In some embodiments, the second sub-pixel sp2 and the plurality of fifth sub-pixels are sub-pixels of a second color (e.g., green). In some embodiments, the third sub-pixel sp3 and the plurality of sixth sub-pixels are sub-pixels of a third color (e.g., blue).

[0070] In some embodiments, the display panel includes a global anode configured to provide a data signal to the plurality of fourth sub-pixels in each second pixel. In some embodiments, the display panel includes a global anode configured to provide a data signal to the plurality of fifth sub-pixels in each second pixel. In some embodiments, the display panel includes a global anode configured to provide a data signal to the plurality of sixth sub-pixels in each second pixel.

[0071] In alternative embodiments, the display panel includes a plurality of anodes configured to provide data signals to the plurality of fourth sub-pixels in each second pixel, respectively and independently.

[0072] In alternative embodiments, the display panel includes a plurality of anodes configured to provide data signals to the plurality of fifth sub-pixels in each second pixel, respectively and independently.

[0073] In alternative embodiments, the display panel includes a plurality of anodes configured to provide data signals to the plurality of sixth sub-pixels in each second pixel, respectively and independently.

[0074] In some embodiments, the display panel includes a common cathode for the plurality of fourth sub-pixels in each second pixel and the first sub-pixel sp1 in the first pixel in the first adjacent first pixel row PR1-1. In some embodiments, the display panel includes a common light emitting layer for the plurality of fourth sub-pixels in each second pixel and the first sub-pixel sp1 in the first pixel in the first adjacent first pixel row PR1-1. In some embodiments, the display panel includes two independent anodes, one for the plurality of fourth sub-pixels in each second pixel and one for the first sub-pixel sp1 in the first pixel in the first adjacent first pixel row PR1-1. The two independent anodes are independently controlled and configured to receive independent data signals.

[0075] In some embodiments, the display panel includes a common cathode for the plurality of fifth sub-pixels in each second pixel and the second sub-pixel sp2 in the first pixel in the second adjacent first pixel row PR1-2. Each second pixel is in a second pixel row that spaces the first adjacent first pixel row PR1-1 and the second adjacent first pixel row PR1-2 apart. In some embodiments, the display panel includes a common light emitting layer for the plurality of fifth sub-pixels in each second pixel and the second sub-pixel sp2 in the first pixel in the second adjacent first pixel row PR1-2. In some embodiments, the display panel includes two independent anodes, one for the plurality of fifth sub-pixels in each second pixel and one for the second sub-pixel sp2 in the first pixel in the second adjacent first pixel row PR1-2. The two independent anodes are independently controlled and configured to receive independent data signals.

[0076] In some embodiments, the display panel includes a common cathode for the plurality of sixth sub-pixels in each second pixel and the third sub-pixel sp3 in the first pixel in the second adjacent first pixel row PR1-2. In some embodiments, the display panel includes a common light emitting layer for the plurality of sixth sub-pixels in each second pixel and the third sub-pixel sp3 in the first pixel in the second adjacent first pixel row PR1-2. In some embodiments, the display panel includes two independent anodes, one for the plurality of sixth sub-pixels in each second pixel and one for the third sub-pixel sp3 in the first pixel in the second adjacent first pixel row PR1-2. The two independent anodes are independently controlled and configured to receive independent data signals.

[0077] In some embodiments, the display panel is configured to operate in a first mode, a second mode, or a third mode. In the first mode, the first pixels in the plurality of first pixel rows PR1 and the second pixels in the plurality of second pixel rows PR2 are configured to emit light. In the second mode, the second pixels in the plurality of second pixel rows PR2 are configured to display an image (e.g., emit light), while the first pixels in the plurality of first pixel rows PR1 are not configured to display an image (e.g., do not emit light). In some embodiments, the second mode is a privacy mode. In the third mode, the second pixels in the plurality of second pixel rows PR2 are not configured to display an image (e.g., emit light), while the first pixels in the plurality of first pixel rows PR1 are configured to display an image (e.g., emit light).

[0078] Figure 3 FIG. 1 is a schematic diagram illustrating a pixel arrangement of a display panel in some embodiments according to the present disclosure. Figure 4 FIG. 2 is a schematic diagram illustrating a pixel arrangement of a display panel in some embodiments according to the present disclosure. Figure 5 FIG. 3 is a schematic diagram illustrating a pixel arrangement of a display panel in some embodiments according to the present disclosure. Figure 6 FIG. 4 is a schematic diagram illustrating a pixel arrangement of a display panel in some embodiments according to the present disclosure. Referring to FIG. 4, a display panel 400 includes a plurality of first pixel rows PR1 and a plurality of second pixel rows PR2. In some embodiments, the display panel 400 is configured to operate in a first mode, a second mode, or a third mode. Figures 3 to 6 In some embodiments, each first pixel in the plurality of first pixels includes a first sub-pixel sp1, a second sub-pixel sp2, and a third sub-pixel sp3. In some embodiments, each second pixel in the plurality of second pixels includes a plurality of fourth sub-pixels sp1’, a plurality of fifth sub-pixels sp2’, and a plurality of sixth sub-pixels sp3’. In some embodiments, the display panel is configured to operate in a first mode, a second mode, or a third mode. Figure 3 In some embodiments, the total number of the plurality of fourth sub-pixels sp1’ is 2, the total number of the plurality of fifth sub-pixels sp2’ is 2, and the total number of the plurality of sixth sub-pixels sp3’ is 2. In some embodiments, the display panel is configured to operate in a first mode, a second mode, or a third mode. Figure 4 In some embodiments, the total number of the plurality of fourth sub-pixels sp1’ is 2, the total number of the plurality of fifth sub-pixels sp2’ is 4, and the total number of the plurality of sixth sub-pixels sp3’ is 4. In some embodiments, the display panel is configured to operate in a first mode, a second mode, or a third mode. Figure 5 In some embodiments, the total number of the plurality of fourth sub-pixels sp1’ is 3, the total number of the plurality of fifth sub-pixels sp2’ is 6, and the total number of the plurality of sixth sub-pixels sp3’ is 9. In some embodiments, the display panel is configured to operate in a first mode, a second mode, or a third mode. Figure 6In some embodiments, the total number of the plurality of fourth sub-pixels sp1’ is 3, the total number of the plurality of fifth sub-pixels sp2’ is 9, and the total number of the plurality of sixth sub-pixels sp3’ is 9. Generally, the larger the area of a sub-pixel assigned to a same color in the same sub-pixel, the more the number of sub-pixels of the same color in the same sub-pixel. In some embodiments, the area ratio between each fourth sub-pixel, each fifth sub-pixel, or each sixth sub-pixel is in a range of 0.5 to 2.0, for example, 0.75 to 1.5, or 0.85 to 1.75. In some embodiments, the ratio of the number of the plurality of fourth sub-pixels sp1’, the number of the plurality of fifth sub-pixels sp2’, and the number of the plurality of sixth sub-pixels sp3’ is in a range of 1 to 3, for example, 1, 2, or 3.

[0079] Figure 7 is a cross-sectional view of a plurality of first pixels in a portion of a display panel in accordance with some embodiments of the present disclosure. Figure 7 may be a cross-sectional view along Figure 2 line A-A’ in FIG. 13B. Referring to Figure 7 , the portion of the display panel having the plurality of first pixels includes a substrate BS, a pixel definition layer PDL on the substrate BS and defining a plurality of first sub-pixel openings in which a plurality of first light emitting elements LE1 are at least partially housed, an encapsulation layer EN on a side of the pixel definition layer PDL and the plurality of first light emitting elements LE1 distal to the substrate BS, a first overcoat layer OC1 on a side of the encapsulation layer EN distal to the substrate BS, a color filter CF and a first black matrix BM1 on a side of the first overcoat layer OC1 distal to the substrate BS, a second overcoat layer OC2 on a side of the color filter CF and the first black matrix BM1 distal to the substrate BS, and a third overcoat layer OC3 on a side of the second overcoat layer OC2 distal to the substrate BS. Optionally, the portion of the display panel further includes a touch structure on a side of the encapsulation layer EN distal to the substrate BS and on a side of the first overcoat layer OC1 proximal to the substrate BS.

[0080] In one example, the thickness of the encapsulation layer EN is in a range of 8 pm to 20 pm. In another example, the thickness of the first overcoat layer OC1 is in a range of 2 pm to 5 pm. In another example, the thickness of the second overcoat layer OC2 is in a range of 3 pm to 15 pm.

[0081] In some embodiments, in the portion of the display panel having the plurality of first pixels, a normal projection of the first black matrix BM1 on the substrate BS at least partially overlaps with a normal projection of the pixel defining layer PDL on the substrate BS. In some embodiments, in the portion of the display panel having the plurality of first pixels, a portion of the first black matrix BM1 located between two adjacent sub-pixels has a first width wl along a plane intersecting the two adjacent sub-pixels and the portion of the first black matrix BM1 and perpendicular to a surface of the substrate BS, a portion of the pixel defining layer PDL located between the same two adjacent sub-pixels has a second width w2 along the plane intersecting the two adjacent sub-pixels and the portion of the pixel defining layer PDL and perpendicular to the surface of the substrate BS, and the second width w2 is greater than the first width wl. In one example, the second width w2 is greater than the first width wl by 2 pm to 4 pm.

[0082] Figure 8 is a cross-sectional view of a plurality of second pixels in a portion of a display panel according to some embodiments of the present disclosure. Figure 8 may be a cross-sectional view along Figure 2 line B-B’ in FIG. 13B. Referring to Figure 8 , the portion of the display panel having the plurality of second pixels includes: a substrate BS; a pixel defining layer PDL located on the substrate BS and defining a plurality of second sub-pixel openings, a plurality of second light emitting elements LE2 at least partially accommodated in the plurality of second sub-pixel openings; an encapsulation layer EN located on a side of the pixel defining layer PDL distal to the substrate BS and on a side of the plurality of second light emitting elements LE2 distal to the substrate BS; a first overcoat layer OC1 located on a side of the encapsulation layer EN distal to the substrate BS; a color filter CF and a first black matrix BM1 located on a side of the first overcoat layer OC1 distal to the substrate BS; a second overcoat layer OC2 located on a side of the color filter CF and the first black matrix BM1 distal to the substrate BS; a second black matrix BM2 located on a side of the second overcoat layer OC2 distal to the substrate BS; and a third overcoat layer OC3 located on a side of the second black matrix BM2 distal to the substrate BS. Optionally, the first black matrix BM1 is an integral structure extending in the portion of the display panel having the plurality of first pixels and the portion of the display panel having the plurality of second pixels. Optionally, the portion of the display panel further includes a touch structure located on a side of the encapsulation layer EN distal to the substrate BS and on a side of the first overcoat layer OC1 proximal to the substrate BS.

[0083] In one example, a thickness of the encapsulation layer EN is in a range from 8 pm to 20 pm. In another example, a thickness of the first overcoat layer OC1 is in a range from 2 pm to 5 pm. In another example, a thickness of the second overcoat layer OC2 is in a range from 3 pm to 15 pm. In another example, a thickness of the third overcoat layer OC3 is in a range from 3 pm to 5 pm.

[0084] In some embodiments, in the portion of the display panel having the plurality of second pixels, the orthogonal projection of the first black matrix BM1 on the substrate BS at least partially overlaps the orthogonal projection of the pixel defining layer PDL on the substrate BS; the orthogonal projection of the second black matrix BM2 on the substrate BS at least partially overlaps the orthogonal projection of the pixel defining layer PDL on the substrate BS.

[0085] In some embodiments, in the portion of the display panel having the plurality of second pixels, a portion of the first black matrix BM1 between two adjacent sub-pixels has a third width w3 along a plane intersecting the two adjacent sub-pixels and the portion of the first black matrix BM1 and perpendicular to the surface of the substrate BS, a portion of the second black matrix BM2 between the same two adjacent sub-pixels has a fourth width w4 along a plane intersecting the two adjacent sub-pixels and the portion of the second black matrix BM2 and perpendicular to the surface of the substrate BS, and a portion of the pixel defining layer PDL between the same two adjacent sub-pixels has a fifth width w5 along a plane intersecting the two adjacent sub-pixels and the portion of the pixel defining layer PDL and perpendicular to the surface of the substrate BS.

[0086] Optionally, the third width w3 is substantially the same as the fifth width w5. As used herein, the term “substantially the same” means that the difference between the two values is no more than 10% of the base value (e.g., one of the two values), such as no more than 8%, no more than 6%, no more than 4%, no more than 2%, no more than 1%, no more than 0.5%, no more than 0.1%, no more than 0.05%, and no more than 0.01% of the base value.

[0087] Optionally, the fourth width w4 is greater than the fifth width w5. In one example, the fourth width w4 is 2 pm to 4 pm greater than the fifth width w5.

[0088] In some embodiments, the fourth width w4 is greater than the third width w3, and the second width w2 is greater than the first width w1. Optionally, the fourth width w4 is greater than the second width w2. Optionally, the third width w3 is greater than the first width w1.

[0089] In some embodiments, in the portion of the display panel having the plurality of second pixels, a first portion of the first black matrix BM1 located between two adjacent sub-pixels of the same color has a first portion width along a plane intersecting the two adjacent sub-pixels of the same color and the first portion of the first black matrix BM1 and perpendicular to a surface of the substrate base BS, and a second portion of the first black matrix BM1 located between two adjacent sub-pixels of different colors has a second portion width along a plane intersecting the two adjacent sub-pixels of different colors and the second portion of the first black matrix BM1 and perpendicular to the surface of the substrate base BS. In some embodiments, the second portion width is greater than the first portion width.

[0090] In some embodiments, in the portion of the display panel having the plurality of second pixels, a first portion of the second black matrix BM2 located between two adjacent sub-pixels of the same color has a third portion width along a plane intersecting the two adjacent sub-pixels of the same color and the first portion of the second black matrix BM2 and perpendicular to a surface of the substrate base BS, and a second portion of the second black matrix BM2 located between two adjacent sub-pixels of different colors has a fourth portion width along a plane intersecting the two adjacent sub-pixels of different colors and the second portion of the second black matrix BM2 and perpendicular to the surface of the substrate base BS. In some embodiments, the fourth portion width is greater than the third portion width.

[0091] Figure 9 is a plan view of a first black matrix in accordance with some embodiments of the disclosure. Figure 10 is a plan view of a second black matrix in accordance with some embodiments of the disclosure. Figure 11 is a superposition of a first black matrix and a second black matrix in accordance with some embodiments of the disclosure. Referring to Figures 9 to 11 , the first black matrix BM1 is disposed at least partially in an area corresponding to the plurality of first pixel rows PR1 and the plurality of second pixel rows PR2, and the second black matrix BM2 is disposed at least partially in an area corresponding to the plurality of second pixel rows PR2 and not disposed at least partially in an area corresponding to the plurality of first pixel rows PR1.

[0092] In some embodiments, the second black matrix BM2 is not disposed (e.g., at least 50% not disposed, at least 55% not disposed, at least 60% not disposed, at least 65% not disposed, at least 70% not disposed, at least 75% not disposed, at least 80% not disposed, at least 85% not disposed, at least 90% not disposed, at least 95% not disposed, at least 99% not disposed, or not disposed at all) in the area corresponding to the plurality of first pixel rows PR1.

[0093] In some embodiments, in the area corresponding to the plurality of first pixel rows PR1, the orthogonal projection of the first black matrix BM1 on the substrate and the orthogonal projection of the second black matrix BM2 on the substrate do not substantially overlap (e.g., at least 50% non-overlapping, at least 55% non-overlapping, at least 60% non-overlapping, at least 65% non-overlapping, at least 70% non-overlapping, at least 75% non-overlapping, at least 80% non-overlapping, at least 85% non-overlapping, at least 90% non-overlapping, at least 95% non-overlapping, at least 99% non-overlapping, completely non-overlapping).

[0094] In some embodiments, in the area corresponding to the plurality of second pixel rows PR2, the orthogonal projection of the first black matrix BM1 on the substrate and the orthogonal projection of the second black matrix BM2 on the substrate at least partially overlap (e.g., at least 10%, at least 15%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45%, at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, or at least 99%).

[0095] In some embodiments, the second black matrix BM2 comprises a plurality of bars BR, and the display panel comprises a plurality of slits ST, the plurality of bars BR and the plurality of slits ST being arranged alternately. Two adjacent bars of the plurality of bars BR are spaced apart by a slit of the plurality of slits ST. Two adjacent slits of the plurality of slits ST are spaced apart by a bar of the plurality of bars BR. The plurality of bars BR corresponds to the plurality of second pixel rows PR2. The plurality of slits ST corresponds to the plurality of first pixel rows PR1.

[0096] In some embodiments, the display panel comprises a plurality of first openings AP1 extending through the first black matrix BM1 and a plurality of second openings AP2 extending through the first black matrix BM1. The plurality of first openings AP1 is configured to allow light emitted from the plurality of first light emitting elements in the plurality of first sub-pixels to transmit, and the plurality of second openings AP2 is configured to allow light emitted from the plurality of second light emitting elements in the plurality of second sub-pixels to transmit.

[0097] In some embodiments, each slit of the plurality of slits ST is a continuous slit. In some embodiments, each slit is bar-shaped. In some embodiments, an area of each slit is greater than a combined area of the plurality of first openings AP1 in each first pixel row of the plurality of first pixel rows PR1.

[0098] In some embodiments, the display panel comprises a plurality of third openings AP3 extending through the second black matrix BM2. The plurality of third openings AP3 is configured to allow light emitted from the plurality of second light emitting elements in the plurality of second sub-pixels to transmit.

[0099] In some embodiments, in the portion of the display panel having the plurality of second pixels, an edge of a second opening of the plurality of second openings AP2 configured to allow the light emitted from the second light emitting element to transmit has a first opening width along a plane intersecting two adjacent second sub-pixels and perpendicular to the surface of the substrate, and an edge of a third opening of the plurality of third openings AP3 configured to allow the light emitted from the same second light emitting element to transmit has a second opening width along the plane intersecting the two adjacent second sub-pixels and perpendicular to the surface of the substrate. Optionally, the first opening width is greater than the second opening width. In one example, the first opening width is greater than the second opening width by 2 pm to 4 pm.

[0100] In some embodiments, a normal projection of an edge of a second opening of the plurality of second openings AP2 configured to allow the light emitted from the second light emitting element to transmit on the substrate substantially surrounds (e.g., at least 50% surrounds, at least 55% surrounds, at least 60% surrounds, at least 65% surrounds, at least 70% surrounds, at least 75% surrounds, at least 80% surrounds, at least 85% surrounds, at least 90% surrounds, at least 95% surrounds, at least 99% surrounds, or completely surrounds) a normal projection of an edge of a third opening of the plurality of third openings AP3 configured to allow the light emitted from the same second light emitting element to transmit on the substrate. In some embodiments, for the same second sub-pixel, an area of a respective second opening of the plurality of second openings AP2 is greater than an area of a respective third opening of the plurality of third openings AP3. In some embodiments, for the sub-pixel of the same color, an area of a respective first opening of the plurality of first openings AP1 is greater than an area of a respective second opening of the plurality of second openings AP2, and the area of the respective second opening is greater than an area of a respective third opening of the plurality of third openings AP3. The inventors of the present disclosure found that by having such a structure, the light transmission in the sub-pixel can be controlled.

[0101] The inventors of the present disclosure found that when the display panel operates in the second mode, the display panel having the structure according to the present disclosure can effectively reduce the privacy viewing angle. In one example, the 45° luminance decay ratio on the left and right sides in the display panel according to the present disclosure can be reduced to 7%, and the 45° luminance decay ratio on the upper side in the display panel according to the present disclosure can be reduced to 4%.

[0102] Figure 12 is a cross-sectional view of a plurality of first pixels in a portion of a display panel according to some embodiments of the present disclosure. Refer to Figure 12The portion of the display panel having the plurality of first pixels includes: a substrate BS; a pixel defining layer PDL on the substrate BS and defining a plurality of first sub-pixel openings in which a plurality of first light emitting elements LE1 are at least partially received; an encapsulation layer EN on a side of the pixel defining layer PDL and the plurality of first light emitting elements LE1 distal to the substrate BS; a first overcoat layer OC1 on a side of the encapsulation layer EN distal to the substrate BS; a color filter CF and a first black matrix BM1 on a side of the first overcoat layer OC1 distal to the substrate BS; a second overcoat layer OC2 on a side of the color filter CF and the first black matrix BM1 distal to the substrate BS; an insulating layer IN on a side of the second overcoat layer OC2 distal to the substrate BS; and a third overcoat layer OC3 on a side of the insulating layer IN distal to the substrate BS. Optionally, the portion of the display panel further includes a touch structure on the side of the encapsulation layer EN distal to the substrate BS and on a side of the first overcoat layer OC1 proximal to the substrate BS.

[0103] In one example, the encapsulation layer EN has a thickness in a range from 8 pm to 20 pm. In another example, the first overcoat layer OC1 has a thickness in a range from 2 pm to 5 pm. In another example, the second overcoat layer OC2 has a thickness in a range from 3 pm to 8 pm. In another example, the insulating layer IN has a thickness in a range from 10 pm to 40 pm. In another example, the third overcoat layer OC3 has a thickness in a range from 2 pm to 4 pm.

[0104] In some embodiments, in the portion of the display panel having the plurality of first pixels, a normal projection of the first black matrix BM1 on the substrate BS at least partially overlaps with a normal projection of the pixel defining layer PDL on the substrate BS. In some embodiments, in the portion of the display panel having the plurality of first pixels, a portion of the first black matrix BM1 between two adjacent sub-pixels has a first width wl along a plane intersecting the two adjacent sub-pixels and the portion of the first black matrix BM1 and perpendicular to a surface of the substrate BS, and a portion of the pixel defining layer PDL between the same two adjacent sub-pixels has a second width w2 along the plane intersecting the two adjacent sub-pixels and the portion of the pixel defining layer PDL and perpendicular to the surface of the substrate BS. Optionally, the second width w2 is greater than the first width wl. In one example, the second width w2 is greater than the first width wl by 2 pm to 4 pm.

[0105] Figure 13 is a cross-sectional view of a plurality of second pixels in a portion of a display panel in accordance with some embodiments of the present disclosure. Reference is made to Figure 13The portion of the display panel having the plurality of second pixels includes: a substrate BS; a pixel defining layer PDL on the substrate BS and defining a plurality of second sub-pixel openings in which a plurality of second light emitting elements LE2 are at least partially received; an encapsulation layer EN on a side of the pixel defining layer PDL and the plurality of second light emitting elements LE2 distal to the substrate BS; a first overcoat layer OC1 on a side of the encapsulation layer EN distal to the substrate BS; a color filter CF and a first black matrix BM1 on a side of the first overcoat layer OC1 distal to the substrate BS; a second overcoat layer OC2 on a side of the color filter CF and the first black matrix BM1 distal to the substrate BS; an insulating layer IN on a side of the second overcoat layer OC2 distal to the substrate BS; a second black matrix BM2 on a side of the insulating layer IN distal to the substrate BS; and a third overcoat layer OC3 on a side of the second black matrix BM2 distal to the substrate BS. Optionally, the first black matrix BM1 is a whole structure extending in the portion of the display panel having the plurality of first pixels and the portion of the display panel having the plurality of second pixels. Optionally, the portion of the display panel further includes a touch structure on a side of the encapsulation layer EN distal to the substrate BS and on a side of the first overcoat layer OC1 proximal to the substrate BS.

[0106] In one example, the encapsulation layer EN has a thickness in a range from 8 pm to 20 pm. In another example, the first overcoat layer OC1 has a thickness in a range from 2 pm to 5 pm. In another example, the second overcoat layer OC2 has a thickness in a range from 3 pm to 8 pm. In another example, the insulating layer IN has a thickness in a range from 10 pm to 40 pm. In another example, the third overcoat layer OC3 has a thickness in a range from 2 pm to 4 pm.

[0107] In some embodiments, in the portion of the display panel having the plurality of second pixels, a projection of the first black matrix BM1 on the substrate BS at least partially overlaps a projection of the pixel defining layer PDL on the substrate BS; a projection of the second black matrix BM2 on the substrate BS at least partially overlaps the projection of the pixel defining layer PDL on the substrate BS.

[0108] In some embodiments, in the portion of the display panel having the plurality of second pixels, a portion of the first black matrix BM1 located between two adjacent sub-pixels has a third width w3 along a plane intersecting the two adjacent sub-pixels and the portion of the first black matrix BM1 and perpendicular to a surface of the substrate base plate BS, a portion of the second black matrix BM2 located between the same two adjacent sub-pixels has a fourth width w4 along a plane intersecting the two adjacent sub-pixels and the portion of the second black matrix BM2 and perpendicular to a surface of the substrate base plate BS, and a portion of the pixel defining layer PDL located between the same two adjacent sub-pixels has a fifth width w5 along a plane intersecting the two adjacent sub-pixels and the portion of the pixel defining layer PDL and perpendicular to a surface of the substrate base plate BS.

[0109] Optionally, the third width w3 is substantially the same as the fifth width w5.

[0110] Optionally, the fourth width w4 is substantially the same as the fifth width w5.

[0111] Optionally, the third width w3 is substantially the same as the fourth width w4.

[0112] Optionally, the third width w3, the fourth width w4, and the fifth width w5 are substantially the same.

[0113] Figure 14 is a plan view of a first black matrix in accordance with some embodiments of the present disclosure. Figure 15 is a plan view of a second black matrix in accordance with some embodiments of the present disclosure. Figure 16 is a superposition of a first black matrix and a second black matrix in accordance with some embodiments of the present disclosure. Referring to Figures 14 to 16 , the first black matrix BM1 is disposed at least partially in an area corresponding to the plurality of first pixel rows PR1 and the plurality of second pixel rows PR2, while the second black matrix BM2 is disposed at least partially in an area corresponding to the plurality of second pixel rows PR2 and not disposed at least partially in an area corresponding to the plurality of first pixel rows PR1.

[0114] In some embodiments, the second black matrix BM2 is not disposed (e.g., at least 50% not disposed, at least 55% not disposed, at least 60% not disposed, at least 65% not disposed, at least 70% not disposed, at least 75% not disposed, at least 80% not disposed, at least 85% not disposed, at least 90% not disposed, at least 95% not disposed, at least 99% not disposed, or not disposed at all) in the area corresponding to the plurality of first pixel rows PR1.

[0115] In some embodiments, in the area corresponding to the plurality of first pixel rows PR1, the orthogonal projection of the first black matrix BM1 on the substrate and the orthogonal projection of the second black matrix BM2 on the substrate do not substantially overlap (e.g., at least 50% non-overlapping, at least 55% non-overlapping, at least 60% non-overlapping, at least 65% non-overlapping, at least 70% non-overlapping, at least 75% non-overlapping, at least 80% non-overlapping, at least 85% non-overlapping, at least 90% non-overlapping, at least 95% non-overlapping, at least 99% non-overlapping, completely non-overlapping).

[0116] In some embodiments, in the area corresponding to the plurality of second pixel rows PR2, the orthogonal projection of the first black matrix BM1 on the substrate and the orthogonal projection of the second black matrix BM2 on the substrate at least partially overlap (e.g., at least 10%, at least 15%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45%, at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, or at least 99%).

[0117] In some embodiments, the second black matrix BM2 comprises a plurality of bars BR, and the display panel comprises a plurality of slits ST, the plurality of bars BR and the plurality of slits ST being arranged alternately. Two adjacent bars of the plurality of bars BR are spaced apart by a slit of the plurality of slits ST. Two adjacent slits of the plurality of slits ST are spaced apart by a bar of the plurality of bars BR. The plurality of bars BR corresponds to the plurality of second pixel rows PR2. The plurality of slits ST corresponds to the plurality of first pixel rows PR1.

[0118] In some embodiments, the display panel comprises a plurality of first openings AP1 extending through the first black matrix BM1 and a plurality of second openings AP2 extending through the first black matrix BM1. The plurality of first openings AP1 are configured to allow light emitted from the plurality of first light emitting elements in the plurality of first sub-pixels to transmit therethrough, and the plurality of second openings AP2 are configured to allow light emitted from the plurality of second light emitting elements in the plurality of second sub-pixels to transmit therethrough.

[0119] In some embodiments, the display panel comprises a plurality of third openings AP3 extending through the second black matrix BM2. The plurality of third openings AP3 are configured to allow light emitted from the plurality of second light emitting elements in the plurality of second sub-pixels to transmit therethrough.

[0120] In some embodiments, in the portion of the display panel having the plurality of second pixels, edges of the second openings in the plurality of second openings AP2 configured to allow the light emitted from the second light emitting element to transmit have a first opening width along a plane intersecting the two adjacent second sub-pixels and perpendicular to the surface of the substrate, and edges of the third openings in the plurality of third openings AP3 configured to allow the light emitted from the same second light emitting element to transmit have a second opening width along the plane intersecting the two adjacent second sub-pixels and perpendicular to the surface of the substrate. Optionally, the first opening width and the second opening width are substantially the same.

[0121] In some embodiments, the edges of the second openings in the plurality of second openings AP2 configured to allow the light emitted from the second light emitting element to transmit have a first opening width along a plane intersecting the two adjacent second sub-pixels and perpendicular to the surface of the substrate, and edges of the third openings in the plurality of third openings AP3 configured to allow the light emitted from the same second light emitting element to transmit have a second opening width along the plane intersecting the two adjacent second sub-pixels and perpendicular to the surface of the substrate. Optionally, the first opening width and the second opening width are substantially the same.

[0122] The inventors of the present disclosure found that a display panel having a structure according to the present disclosure can effectively reduce the privacy viewing angle when the display panel operates in the second mode. In one example, the 45° luminance decay ratio of the left and right sides in a display panel according to the present disclosure can be reduced to 4%, and the 45° luminance decay ratio of the upper side in a display panel according to the present disclosure can be reduced to 4%.

[0123] Figure 17 is a cross-sectional view of a plurality of first pixels in a portion of a display panel according to some embodiments of the present disclosure. Refer to Figure 17The portion of the display panel having the plurality of first pixels includes: a substrate BS; a pixel defining layer PDL on the substrate BS and defining a plurality of first sub-pixel openings in which a plurality of first light emitting elements LE1 are at least partially received; an encapsulation layer EN on a side of the pixel defining layer PDL and the plurality of first light emitting elements LE1 distal to the substrate BS; a first overcoat layer OC1 on a side of the encapsulation layer EN distal to the substrate BS; a color filter CF and a first black matrix BM1 on a side of the first overcoat layer OC1 distal to the substrate BS; a second overcoat layer OC2 on a side of the color filter CF and the first black matrix BM1 distal to the substrate BS; an insulating layer IN on a side of the second overcoat layer OC2 distal to the substrate BS; and a third overcoat layer OC3 on a side of the insulating layer IN distal to the substrate BS. Optionally, the portion of the display panel further includes a touch structure on the side of the encapsulation layer EN distal to the substrate BS and on a side of the first overcoat layer OC1 proximal to the substrate BS.

[0124] In one example, the encapsulation layer EN has a thickness in a range from 8 pm to 20 pm. In another example, the first overcoat layer OC1 has a thickness in a range from 2 pm to 5 pm. In another example, the second overcoat layer OC2 has a thickness in a range from 3 pm to 8 pm. In another example, the insulating layer IN has a thickness in a range from 10 pm to 40 pm. In another example, the third overcoat layer OC3 has a thickness in a range from 2 pm to 4 pm.

[0125] In some embodiments, in the portion of the display panel having the plurality of first pixels, a normal projection of the first black matrix BM1 on the substrate BS at least partially overlaps with a normal projection of the pixel defining layer PDL on the substrate BS. In some embodiments, in the portion of the display panel having the plurality of first pixels, a portion of the first black matrix BM1 between two adjacent sub-pixels has a first width wl along a plane intersecting the two adjacent sub-pixels and the portion of the first black matrix BM1 and perpendicular to a surface of the substrate BS, and a portion of the pixel defining layer PDL between the same two adjacent sub-pixels has a second width w2 along the plane intersecting the two adjacent sub-pixels and the portion of the pixel defining layer PDL and perpendicular to the surface of the substrate BS. Optionally, the first width wl is substantially the same as the second width w2.

[0126] Figure 18 is a cross-sectional view of a plurality of second pixels in a portion of a display panel according to some embodiments of the present disclosure. Referring to Figure 18The portion of the display panel having a plurality of second pixels includes: a substrate BS; a pixel defining layer PDL located on the substrate BS and defining a plurality of second sub-pixel openings, wherein a plurality of second light-emitting elements LE2 are at least partially accommodated in the plurality of second sub-pixel openings; an encapsulation layer EN located on the side of the pixel defining layer PDL and the plurality of second light-emitting elements LE2 away from the substrate BS; a first cladding layer OC1 located on the side of the encapsulation layer EN away from the substrate BS; a color filter CF and a first black matrix BM1 located on the side of the first cladding layer OC1 away from the substrate BS; a second cladding layer OC2 located on the side of the color filter CF and the first black matrix BM1 away from the substrate BS; an insulating layer IN located on the side of the second cladding layer OC2 away from the substrate BS; a second black matrix BM2 located on the side of the insulating layer IN away from the substrate BS; and a third cladding layer OC3 located on the side of the second black matrix BM2 away from the substrate BS. Optionally, the first black matrix BM1 is an integral structure extending in a portion of the display panel having a plurality of first pixels and a portion of the display panel having a plurality of second pixels. Optionally, the portion of the display panel also includes a touch structure located on the side of the encapsulation layer EN away from the substrate BS and on the side of the first cladding layer OC1 close to the substrate BS.

[0127] In one example, the thickness of the encapsulation layer EN is in the range of 8 μm to 20 μm. In another example, the thickness of the first overlay layer OC1 is in the range of 2 μm to 5 μm. In another example, the thickness of the second overlay layer OC2 is in the range of 3 μm to 8 μm. In another example, the thickness of the insulating layer IN is in the range of 10 μm to 40 μm. In another example, the thickness of the third overlay layer OC3 is in the range of 2 μm to 4 μm.

[0128] In some embodiments, in a portion of the display panel having a plurality of second pixels, the orthographic projection of the first black matrix BM1 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS; the orthographic projection of the second black matrix BM2 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS.

[0129] In some embodiments, in a portion of the display panel having a plurality of second pixels, the portion of the first black matrix BM1 located between two adjacent sub-pixels has a third width w3 along a plane that intersects with the two adjacent sub-pixels and the portion of the first black matrix BM1 and is perpendicular to the surface of the substrate BS; the portion of the second black matrix BM2 located between the same two adjacent sub-pixels has a fourth width w4 along a plane that intersects with the two adjacent sub-pixels and the portion of the second black matrix BM2 and is perpendicular to the surface of the substrate BS; and the portion of the pixel defining layer PDL located between the same two adjacent sub-pixels has a fifth width w5 along a plane that intersects with the two adjacent sub-pixels and the portion of the pixel defining layer PDL and is perpendicular to the surface of the substrate BS.

[0130] Alternatively, the third width w3 is essentially the same as the fifth width w5.

[0131] Alternatively, the fourth width w4 is essentially the same as the fifth width w5.

[0132] Alternatively, the third width w3 is substantially the same as the fourth width w4.

[0133] Alternatively, the third width w3, the fourth width w4, and the fifth width w5 are essentially the same.

[0134] In some embodiments, in a portion of the display panel having a plurality of second pixels, the display panel further includes a light control structure LCF that extends at least partially through the insulating layer IN. Optionally, the light control structure LCF is connected to a portion of a first black matrix BM1 and to a portion of a second black matrix BM2. In one example, the light control structure LCF extends from a portion of the first black matrix BM1 through the insulating layer IN and reaches a portion of the second black matrix BM2.

[0135] In some embodiments, the light control structure LCF is not disposed in the region between adjacent sub-pixels of different colors. In some embodiments, the light control structure LCF is disposed in at least one region between adjacent sub-pixels of the same color.

[0136] Various suitable methods can be used to form the light control structure LCF. For example, forming the light control structure LCF includes: forming a via extending through the insulating layer IN, and depositing a black material into the via to form the light control structure LCF. In another example, forming the light control structure LCF includes: coating a black material layer on a second cladding layer OC2, patterning the black material layer to form at least one sublayer of the light control structure LCF, and optionally repeating the coating and patterning steps at least once to form the light control structure LCF. An insulating material layer can then be deposited on the substrate to planarize the substrate, thereby forming the insulating layer IN.

[0137] Figure 19 It is a plan view of the first black matrix according to some embodiments of this disclosure. Figure 20 This is a plan view of the second black matrix according to some embodiments of this disclosure. Figure 21 It is a superposition of a first black matrix and a second black matrix according to some embodiments of this disclosure. (Refer to...) Figures 19 to 21 The first black matrix BM1 is at least partially disposed in the region corresponding to the plurality of first pixel rows PR1 and the plurality of second pixel rows PR2, while the second black matrix BM2 is at least partially not disposed in the region corresponding to the plurality of first pixel rows PR1, and is at least partially disposed in the region corresponding to the plurality of second pixel rows PR2.

[0138] In some embodiments, the second black matrix BM2 is substantially not set in the region corresponding to the plurality of first pixel rows PR1 (e.g., not set at least 50%, not set at least 55%, not set at least 60%, not set at least 65%, not set at least 70%, not set at least 75%, not set at least 80%, not set at least 85%, not set at least 90%, not set at least 95%, not set at least 99%, or not set at all).

[0139] In some embodiments, in the region corresponding to a plurality of first pixel rows PR1, the orthographic projection of the first black matrix BM1 on the substrate and the orthographic projection of the second black matrix BM2 on the substrate are substantially non-overlapping (e.g., at least 50% non-overlapping, at least 55% non-overlapping, at least 60% non-overlapping, at least 65% non-overlapping, at least 70% non-overlapping, at least 75% non-overlapping, at least 80% non-overlapping, at least 85% non-overlapping, at least 90% non-overlapping, at least 95% non-overlapping, at least 99% non-overlapping, or completely non-overlapping).

[0140] In some embodiments, in the region corresponding to a plurality of second pixel rows PR2, the orthographic projection of the first black matrix BM1 on the substrate overlaps at least partially (e.g., at least 10%, at least 15%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45%, at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, or at least 99%).

[0141] In some embodiments, the second black matrix BM2 includes a plurality of bars BR, and the display panel includes a plurality of slits ST, with the bars BR and slits ST arranged alternately. Two adjacent bars in the plurality of bars BR are separated by slits in the plurality of slits ST. Two adjacent slits in the plurality of slits ST are separated by bars in the plurality of bars BR. The plurality of bars BR corresponds to a plurality of second pixel rows PR2. The plurality of slits ST corresponds to a plurality of first pixel rows PR1.

[0142] In some embodiments, the display panel includes a plurality of first openings AP1 extending through a first black matrix BM1 and a plurality of second openings AP2 extending through the first black matrix BM1. The plurality of first openings AP1 are configured to allow light emitted from a plurality of first light-emitting elements in a plurality of first sub-pixels to pass through, and the plurality of second openings AP2 are configured to allow light emitted from a plurality of second light-emitting elements in a plurality of second sub-pixels to pass through.

[0143] In some embodiments, the display panel includes a plurality of third openings AP3 extending through a second black matrix BM2. The plurality of third openings AP3 are configured to allow light emitted from a plurality of second light-emitting elements in a plurality of second sub-pixels to pass through.

[0144] In some embodiments, in a portion of the display panel having a plurality of second pixels, a second opening AP2 configured to allow light emitted from a second light-emitting element to pass through has a first opening width along a plane intersecting two adjacent second sub-pixels and perpendicular to the surface of the substrate, and a third opening AP3 configured to allow light emitted from the same second light-emitting element to pass through has a second opening width along a plane intersecting two adjacent second sub-pixels and perpendicular to the surface of the substrate. Optionally, the first opening width and the second opening width are substantially the same.

[0145] In some embodiments, the orthographic projection of the edge of a second opening AP2 configured to allow light emitted from a second light-emitting element to pass through onto the substrate substantially (e.g., at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 99%, or completely) overlaps with each other.

[0146] The inventors of this disclosure have discovered that when the display panel is operated in a second mode, the display panel having the structure according to this disclosure can effectively reduce the privacy viewing angle. In one example, the brightness attenuation ratio at 45° on the left and right sides of the display panel according to this disclosure can be reduced to 3%, and the brightness attenuation ratio at 45° on the top side of the display panel according to this disclosure can be reduced to 3%.

[0147] Figure 22 This is a cross-sectional view of a plurality of first pixels in a portion of a display panel according to some embodiments of the present disclosure. (Refer to...) Figure 22 The portion of the display panel having a plurality of first pixels includes: a substrate BS; a pixel defining layer PDL located on the substrate BS and defining a plurality of first sub-pixel openings, wherein a plurality of first light-emitting elements LE1 are at least partially accommodated in the plurality of first sub-pixel openings; an encapsulation layer EN located on the side of the pixel defining layer PDL and the plurality of first light-emitting elements LE1 away from the substrate BS; a first cladding layer OC1 located on the side of the encapsulation layer EN away from the substrate BS; a color filter CF and a first black matrix BM1 located on the side of the first cladding layer OC1 away from the substrate BS; a second cladding layer OC2 located on the side of the color filter CF and the first black matrix BM1 away from the substrate BS; a first insulating layer IN1 located on the side of the second cladding layer OC2 away from the substrate BS; a second insulating layer IN2 located on the side of the first insulating layer IN1 away from the substrate BS; and a third cladding layer OC3 located on the side of the second insulating layer IN2 away from the substrate BS. Optionally, the display panel may also include a touch structure located on the side of the encapsulation layer EN away from the substrate BS and on the side of the first cladding layer OC1 close to the substrate BS.

[0148] In one example, the thickness of the encapsulation layer EN is in the range of 8 μm to 20 μm. In another example, the thickness of the first overlay layer OC1 is in the range of 2 μm to 5 μm. In another example, the thickness of the second overlay layer OC2 is in the range of 3 μm to 8 μm. In another example, the thickness of the insulating layer IN is in the range of 10 μm to 40 μm. In another example, the thickness of the third overlay layer OC3 is in the range of 2 μm to 4 μm.

[0149] In some embodiments, in a portion of the display panel having a plurality of first pixels, the orthographic projection of the first black matrix BM1 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS. In some embodiments, in a portion of the display panel having a plurality of first pixels, the portion of the first black matrix BM1 located between two adjacent sub-pixels has a first width w1 along a plane intersecting the two adjacent sub-pixels and the portion of the first black matrix BM1 and perpendicular to the surface of the substrate BS; the portion of the pixel defining layer PDL located between the same two adjacent sub-pixels has a second width w2 along a plane intersecting the two adjacent sub-pixels and the portion of the pixel defining layer PDL and perpendicular to the surface of the substrate BS. Optionally, the first width w1 and the second width w2 are substantially the same.

[0150] Figure 23 This is a cross-sectional view of a plurality of second pixels in a portion of a display panel according to some embodiments of the present disclosure. (Refer to...) Figure 23 In some embodiments, the second black matrix BM2 includes multiple sublayers, such as a first sublayer BM2-1 and a second sublayer BM2-2. In some embodiments, the portion of the display panel having multiple second pixels includes: a substrate BS; a pixel defining layer PDL located on the substrate BS and defining multiple second subpixel openings, wherein multiple second light-emitting elements LE2 are at least partially accommodated in the multiple second subpixel openings; an encapsulation layer EN located on the side of the pixel defining layer PDL and the multiple second light-emitting elements LE2 away from the substrate BS; a first cladding layer OC1 located on the side of the encapsulation layer EN away from the substrate BS; a color filter CF and a first black matrix BM1 located on the side of the first cladding layer OC1 away from the substrate BS; and a second cladding layer OC2 located on the side of the color filter CF and the first black matrix BM1. The second black matrix BM1 has the following components: a black matrix BM1 on the side away from the substrate BS; a first insulating layer IN1 located on the side of the second cladding layer OC2 away from the substrate BS; a first sublayer BM2-1 of the second black matrix BM2 located on the side of the first insulating layer IN1 away from the substrate BS; a second insulating layer IN2 located on the side of the first sublayer BM2-1 of the second black matrix BM2 away from the substrate BS; a second sublayer BM2-2 of the second black matrix BM2 located on the side of the second insulating layer IN2 away from the substrate BS; and a third cladding layer OC3 located on the side of the second sublayer BM2-2 of the second black matrix BM2 away from the substrate BS. Optionally, the first black matrix BM1 is an integral structure extending in a portion of the display panel having a plurality of first pixels and a portion of the display panel having a plurality of second pixels. Optionally, a portion of the display panel further includes a touch structure located on the side of the encapsulation layer EN away from the substrate BS and on the side of the first cladding layer OC1 close to the substrate BS.

[0151] In one example, the thickness of the encapsulation layer EN is in the range of 8 μm to 20 μm. In another example, the thickness of the first encapsulation layer OC1 is in the range of 2 μm to 5 μm. In another example, the thickness of the second encapsulation layer OC2 is in the range of 3 μm to 8 μm. In another example, the combined thickness of the first insulating layer IN1 and the second insulating layer IN2 is in the range of 10 μm to 40 μm. In another example, the thickness of the third encapsulation layer OC3 is in the range of 2 μm to 4 μm. In another example, the distance between two adjacent sublayers of the second black matrix BM2 is in the range of 5 μm to 15 μm. In some embodiments, the thickness of the first insulating layer IN1 is greater than the thickness of the third encapsulation layer OC3, greater than the thickness of the second encapsulation layer OC2, and greater than the thickness of the first encapsulation layer OC1. In some embodiments, the thickness of the second insulating layer IN2 is greater than the thickness of the third encapsulation layer OC3, greater than the thickness of the second encapsulation layer OC2, and greater than the thickness of the first encapsulation layer OC1.

[0152] In some embodiments, in a portion of the display panel having a plurality of second pixels, the orthographic projection of the first black matrix BM1 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS; the orthographic projection of the first sublayer BM2-1 of the second black matrix BM2 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS; and the orthographic projection of the second sublayer BM2-2 of the second black matrix BM2 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS.

[0153] In some embodiments, in a portion of the display panel having a plurality of second pixels, the portion of the first black matrix BM1 located between two adjacent sub-pixels has a third width w3 along a plane that intersects with the two adjacent sub-pixels and the portion of the first black matrix BM1 and is perpendicular to the surface of the substrate BS; the portion of the first sublayer BM2-1 of the second black matrix BM2 located between the same two adjacent sub-pixels has a fourth width w4 along a plane that intersects with the two adjacent sub-pixels and the portion of the first sublayer BM2-1 and is perpendicular to the surface of the substrate BS; the portion of the second sublayer BM2-2 of the second black matrix BM2 located between the same two adjacent sub-pixels has a fourth width w4 along a plane that intersects with the two adjacent sub-pixels and the portion of the second sublayer BM2-2 and is perpendicular to the surface of the substrate BS; and the portion of the pixel defining layer PDL located between the same two adjacent sub-pixels has a fifth width w5 along a plane that intersects with the two adjacent sub-pixels and the portion of the pixel defining layer PDL and is perpendicular to the surface of the substrate BS.

[0154] Alternatively, the third width w3 is essentially the same as the fifth width w5.

[0155] Alternatively, the fourth width w4 is essentially the same as the fifth width w5.

[0156] Alternatively, the third width w3 is substantially the same as the fourth width w4.

[0157] Alternatively, the third width w3, the fourth width w4, and the fifth width w5 are essentially the same.

[0158] Figure 24 This is a cross-sectional view of a plurality of second pixels in a portion of a display panel according to an alternative embodiment of the present disclosure. (Refer to...) Figure 24 In some embodiments, the second black matrix BM2 includes multiple sublayers, such as a first sublayer BM2-1, a second sublayer BM2-2, and a third sublayer BM2-3. In some embodiments, the portion of the display panel having multiple second pixels includes: a substrate BS; a pixel defining layer PDL located on the substrate BS and defining multiple second subpixel openings, wherein multiple second light-emitting elements LE2 are at least partially accommodated in the multiple second subpixel openings; an encapsulation layer EN located on the side of the pixel defining layer PDL and the multiple second light-emitting elements LE2 away from the substrate BS; a first cladding layer OC1 located on the side of the encapsulation layer EN away from the substrate BS; a color filter CF and the first black matrix BM1 located on the side of the first cladding layer OC1 away from the substrate BS; a second cladding layer OC2 located on the side of the color filter CF and the first black matrix BM1 away from the substrate BS; and a first insulating layer IN1 located on the side of the second cladding layer OC2 away from the substrate BS. The first black matrix BM1 is located on one side of the substrate BS; a first sublayer BM2-1 of the second black matrix BM2, located on the side of the first insulating layer IN1 away from the substrate BS; a second insulating layer IN2, located on the side of the first sublayer BM2-1 of the second black matrix BM2 away from the substrate BS; a second sublayer BM2-2 of the second black matrix BM2, located on the side of the second insulating layer IN2 away from the substrate BS; a third insulating layer IN3, located on the side of the second sublayer BM2-2 of the second black matrix BM2 away from the substrate BS; a third sublayer BM2-3 of the second black matrix BM2, located on the side of the third insulating layer IN3 away from the substrate BS; and a third cladding layer OC3, located on the side of the third sublayer BM2-3 of the second black matrix BM2 away from the substrate BS. Optionally, the first black matrix BM1 is an integral structure extending in the portion of the display panel having a plurality of first pixels and the portion of the display panel having a plurality of second pixels. Optionally, the display panel may also include a touch structure located on the side of the encapsulation layer EN away from the substrate BS and on the side of the first cladding layer OC1 close to the substrate BS.

[0159] In one example, the thickness of the encapsulation layer EN is in the range of 8 μm to 20 μm. In another example, the thickness of the first overlay layer OC1 is in the range of 2 μm to 5 μm. In another example, the thickness of the second overlay layer OC2 is in the range of 3 μm to 8 μm. In another example, the combined thickness of the first insulating layer IN1, the second insulating layer IN2, and the third insulating layer is in the range of 10 μm to 40 μm. In another example, the thickness of the third overlay layer OC3 is in the range of 2 μm to 4 μm. In another example, the distance between two adjacent sublayers of the second black matrix BM2 is in the range of 5 μm to 15 μm.

[0160] In some embodiments, in a portion of the display panel having a plurality of second pixels, the orthographic projection of the first black matrix BM1 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS; the orthographic projection of the first sublayer BM2-1 of the second black matrix BM2 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS; the orthographic projection of the second sublayer BM2-2 of the second black matrix BM2 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS; and the orthographic projection of the third sublayer BM2-3 of the second black matrix BM2 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS.

[0161] In some embodiments, in a portion of the display panel having a plurality of second pixels, the portion of the first black matrix BM1 located between two adjacent sub-pixels has a third width w3 along a plane intersecting the two adjacent sub-pixels and the portion of the first black matrix BM1 and perpendicular to the surface of the substrate BS; the portion of the first sublayer BM2-1 of the second black matrix BM2 located between the same two adjacent sub-pixels has a fourth width w4 along a plane intersecting the two adjacent sub-pixels and the portion of the first sublayer BM2-1 and perpendicular to the surface of the substrate BS; the portion of the second sublayer BM2-2 of the second black matrix BM2 located between the same two adjacent sub-pixels has a fourth width w4. The portion between the two adjacent sub-pixels and the portion of the second sub-layer BM2-2 has a fourth width w4 along a plane that intersects with the portion of the two adjacent sub-pixels and the portion of the second sub-layer BM2-2 and is perpendicular to the surface of the substrate BS. The portion of the third sub-layer BM2-3 of the second black matrix BM2 located between the same two adjacent sub-pixels has a fourth width w4 along a plane that intersects with the portion of the two adjacent sub-pixels and the portion of the third sub-layer BM2-3 and is perpendicular to the surface of the substrate BS. The portion of the pixel defining layer PDL located between the same two adjacent sub-pixels has a fifth width w5 along a plane that intersects with the portion of the two adjacent sub-pixels and the portion of the pixel defining layer PDL and is perpendicular to the surface of the substrate BS.

[0162] Figure 25It is a plan view of the first black matrix according to some embodiments of this disclosure. Figure 26 This is a plan view of the second black matrix according to some embodiments of this disclosure. Figure 27 It is a superposition of a first black matrix and a second black matrix according to some embodiments of this disclosure. Figure 26 and Figure 27 The second black matrix BM2 depicted in the diagram may include multiple sub-layers (e.g., such as...). Figure 23 The two sub-layers shown, or as Figure 24 (The three sub-layers shown). (Refer to...) Figures 25 to 27 The first black matrix BM1 is at least partially disposed in the region corresponding to the plurality of first pixel rows PR1 and the plurality of second pixel rows PR2, while the second black matrix BM2 is at least partially not disposed in the region corresponding to the plurality of first pixel rows PR1, and is at least partially disposed in the region corresponding to the plurality of second pixel rows PR2.

[0163] In some embodiments, any sublayer of the second black matrix BM2 is substantially not set in the region corresponding to the plurality of first pixel rows PR1 (e.g., not set at least 50%, not set at least 55%, not set at least 60%, not set at least 65%, not set at least 70%, not set at least 75%, not set at least 80%, not set at least 85%, not set at least 90%, not set at least 95%, not set at least 99%, or not set at all).

[0164] In some embodiments, in the region corresponding to a plurality of first pixel rows PR1, the orthographic projection of the first black matrix BM1 on the substrate and the orthographic projection of any sublayer of the second black matrix BM2 on the substrate are substantially non-overlapping (e.g., at least 50% non-overlapping, at least 55% non-overlapping, at least 60% non-overlapping, at least 65% non-overlapping, at least 70% non-overlapping, at least 75% non-overlapping, at least 80% non-overlapping, at least 85% non-overlapping, at least 90% non-overlapping, at least 95% non-overlapping, at least 99% non-overlapping, or completely non-overlapping).

[0165] In some embodiments, in the region corresponding to a plurality of second pixel rows PR2, the orthographic projection of the first black matrix BM1 on the substrate overlaps at least partially (e.g., at least 10%, at least 15%, at least 20%, at least 25%, at least 30%, at least 35%, at least 40%, at least 45%, at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, or at least 99%).

[0166] In some embodiments, each sublayer of the second black matrix BM2 includes a plurality of strips BR, and the display panel includes a plurality of slits ST, with the strips BR and slits ST arranged alternately. Two adjacent strips in the plurality of strips BR are separated by slits in the plurality of slits ST. Two adjacent slits in the plurality of slits ST are separated by strips in the plurality of strips BR. The plurality of strips BR corresponds to a plurality of second pixel rows PR2. The plurality of slits ST corresponds to a plurality of first pixel rows PR1.

[0167] In some embodiments, the display panel includes a plurality of first openings AP1 extending through a first black matrix BM1 and a plurality of second openings AP2 extending through the first black matrix BM1. The plurality of first openings AP1 are configured to allow light emitted from a plurality of first light-emitting elements in a plurality of first sub-pixels to pass through, and the plurality of second openings AP2 are configured to allow light emitted from a plurality of second light-emitting elements in a plurality of second sub-pixels to pass through.

[0168] In some embodiments, the display panel includes a plurality of third openings AP3 extending through at least one sublayer of the second black matrix BM2. The plurality of third openings AP3 are configured to allow light emitted from a plurality of second light-emitting elements in a plurality of second sub-pixels to pass through.

[0169] In some embodiments, in a portion of the display panel having a plurality of second pixels, a second opening AP2 configured to allow light emitted from a second light-emitting element to pass through has a first opening width along a plane intersecting two adjacent second sub-pixels and perpendicular to the surface of the substrate, and a third opening AP3 configured to allow light emitted from the same second light-emitting element to pass through has a second opening width along a plane intersecting two adjacent second sub-pixels and perpendicular to the surface of the substrate. Optionally, the first opening width and the second opening width are substantially the same.

[0170] In some embodiments, the orthographic projection of the edge of a second opening AP2 configured to allow light emitted from a second light-emitting element to pass through onto the substrate substantially (e.g., at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 99%, or completely) overlaps with each other.

[0171] The inventors of this disclosure have discovered that when the display panel is operated in a second mode, the display panel having the structure according to this disclosure can effectively reduce the privacy viewing angle. In one example, the brightness attenuation ratio at 45° on the left and right sides of the display panel according to this disclosure can be reduced to 0.5%, and the brightness attenuation ratio at 45° on the top side of the display panel according to this disclosure can be reduced to 0.5%.

[0172] Figure 28 Various parameters in a display panel according to some embodiments of this disclosure are shown. (Refer to...) Figure 28 The portion of the first black matrix BM1 located between two adjacent sub-pixels has a third width w3 along a plane that intersects with the two adjacent sub-pixels and the portion of the first black matrix BM1 and is perpendicular to the surface of the substrate BS. The portion of the second black matrix BM2 located between the same two adjacent sub-pixels has a fourth width w4 along a plane that intersects with the two adjacent sub-pixels and the portion of the second black matrix BM2 and is perpendicular to the surface of the substrate BS. The first sub-pixel has a first sub-pixel width d1 along a plane that intersects with the portion of the two adjacent sub-pixels and the pixel defining layer PDL and is perpendicular to the surface of the substrate. The second sub-pixel has a second sub-pixel width d2 along a plane that intersects with the portion of the two adjacent sub-pixels and the pixel defining layer PDL and is perpendicular to the surface of the substrate BS. The third sub-pixel has a third sub-pixel width d3 along a plane that intersects with the portion of the two adjacent sub-pixels and the pixel defining layer PDL and is perpendicular to the surface of the substrate BS. The first black matrix BM1 is spaced apart from the corresponding sub-pixel by a distance h1. The second black matrix BM2 is spaced apart from the first black matrix BM1 by a distance h2. The emission angle θ of each sub-pixel satisfies the following condition: arctanθ is in the range of d / ((h1+h2)-0.1*(h1+h2)) to d / ((h1+h2)+0.1*(h1+h2)), where d is the width of each sub-pixel along a plane that intersects with the portions of two adjacent sub-pixels and the pixel definition layer PDL and is perpendicular to the surface of the substrate.

[0173] Figure 29 The correlation between brightness attenuation and viewing angle is illustrated in some embodiments according to this disclosure. For example... Figure 29As shown, when the viewing angle increases from 0 degrees to 40 degrees, the brightness attenuation decreases to near zero. In Example 1, d1 = d2 = d3 = 9.5 μm; w3 = w4 = 7 μm; h1 = 12 μm; h2 = 11 μm; and θ is 22.4 degrees. In Example 2, d1 = d2 = d3 = 9.5 μm, w3 = 7 μm, w4 = 5 μm, h1 = 12 μm, h2 = 11 μm; and θ is 24.5 degrees. In Example 3, d1 = d2 = d3 = 9.5 μm, w3 = 5 μm, w4 = 5 μm, h1 = 12 μm, h2 = 11 μm; and θ is 24.5 degrees.

[0174] In some embodiments, the display panel further includes a lens layer having a plurality of lenses. Various suitable implementations may be practiced in this disclosure. Figure 30 This is a cross-sectional view of a plurality of second pixels in a portion of a display panel according to some embodiments of the present disclosure. (Refer to...) Figure 30 The portion of the display panel having a plurality of second pixels includes: a substrate BS; a pixel defining layer PDL located on the substrate BS and defining a plurality of second sub-pixel openings, wherein a plurality of second light-emitting elements LE2 are at least partially accommodated in the plurality of second sub-pixel openings; an encapsulation layer EN located on the side of the pixel defining layer PDL and the plurality of second light-emitting elements LE2 away from the substrate BS; a first cladding layer OC1 located on the side of the encapsulation layer EN away from the substrate BS; a lens layer LEL and a first black matrix BM1 located on the side of the first cladding layer OC1 away from the substrate BS; a second cladding layer OC2 located on the side of the lens layer LEL and the first black matrix BM1 away from the substrate BS; an insulating layer IN located on the side of the second cladding layer OC2 away from the substrate BS; a second black matrix BM2 located on the side of the insulating layer IN away from the substrate BS; and a third cladding layer OC3 located on the side of the second black matrix BM2 away from the substrate BS. Optionally, the first black matrix BM1 is an integral structure extending in a portion of the display panel having a plurality of first pixels and a portion of the display panel having a plurality of second pixels. Optionally, the portion of the display panel also includes a touch structure located on the side of the encapsulation layer EN away from the substrate BS and on the side of the first cladding layer OC1 close to the substrate BS.

[0175] In some embodiments, in a portion of the display panel having a plurality of second pixels, the orthographic projection of the first black matrix BM1 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS; the orthographic projection of the second black matrix BM2 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS.

[0176] In some embodiments, the lens layer LEL includes a plurality of lenses. In some embodiments, in a portion of the display panel having a plurality of second pixels, the orthographic projection of each of the plurality of lenses onto the substrate BS at least partially overlaps with the orthographic projection of the second light-emitting element LE2 onto the substrate. The inventors of this disclosure have discovered that by providing the lens layer LEL, brightness attenuation can be further reduced.

[0177] Figure 31 This is a cross-sectional view of a plurality of second pixels in a portion of a display panel according to some embodiments of the present disclosure. (Refer to...) Figure 31 The portion of the display panel having a plurality of second pixels includes: a substrate BS; a pixel defining layer PDL located on the substrate BS and defining a plurality of second sub-pixel openings, wherein a plurality of second light-emitting elements LE2 are at least partially accommodated in the plurality of second sub-pixel openings; an encapsulation layer EN located on the side of the pixel defining layer PDL and the plurality of second light-emitting elements LE2 away from the substrate BS; a first cladding layer OC1 located on the side of the encapsulation layer EN away from the substrate BS; a color filter CF and a first black matrix BM1 located on the side of the first cladding layer OC1 away from the substrate BS; a second cladding layer OC2 located on the side of the color filter CF and the first black matrix BM1 away from the substrate BS; an insulating layer IN located on the side of the second cladding layer OC2 away from the substrate BS; a lens layer LEL and a second black matrix BM2 located on the side of the insulating layer IN away from the substrate BS; and a third cladding layer OC3 located on the side of the lens layer LEL and the second black matrix BM2 away from the substrate BS. Optionally, the first black matrix BM1 is an integral structure extending in a portion of the display panel having a plurality of first pixels and a portion of the display panel having a plurality of second pixels. Optionally, the portion of the display panel also includes a touch structure located on the side of the encapsulation layer EN away from the substrate BS and on the side of the first cladding layer OC1 close to the substrate BS.

[0178] In some embodiments, in a portion of the display panel having a plurality of second pixels, the orthographic projection of the first black matrix BM1 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS; the orthographic projection of the second black matrix BM2 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS.

[0179] In some embodiments, the lens layer LEL includes a plurality of lenses. In some embodiments, in a portion of the display panel having a plurality of second pixels, the orthographic projection of each of the plurality of lenses onto the substrate BS at least partially overlaps with the orthographic projection of the second light-emitting element LE2 onto the substrate. The inventors of this disclosure have discovered that by providing the lens layer LEL, brightness attenuation can be further reduced.

[0180] Figure 32 This is a cross-sectional view of a plurality of second pixels in a portion of a display panel according to some embodiments of the present disclosure. (Refer to...) Figure 32 The portion of the display panel having a plurality of second pixels includes: a substrate BS; a pixel defining layer PDL located on the substrate BS and defining a plurality of second sub-pixel openings, wherein a plurality of second light-emitting elements LE2 are at least partially accommodated in the plurality of second sub-pixel openings; an encapsulation layer EN located on the side of the pixel defining layer PDL and the plurality of second light-emitting elements LE2 away from the substrate BS; a first cladding layer OC1 located on the side of the encapsulation layer EN away from the substrate BS; a color filter CF and a first black matrix BM1 located on the side of the first cladding layer OC1 away from the substrate BS; a second cladding layer OC2 located on the side of the color filter CF and the first black matrix BM1 away from the substrate BS; an insulating layer IN located on the side of the second cladding layer OC2 away from the substrate BS; a second black matrix BM2 located on the side of the insulating layer IN away from the substrate BS; a third cladding layer OC3 located on the side of the second black matrix BM2 away from the substrate BS; and a lens layer LEL located on the side of the third cladding layer OC3 away from the substrate BS. Optionally, the first black matrix BM1 is an integral structure extending in a portion of the display panel having a plurality of first pixels and a portion of the display panel having a plurality of second pixels. Optionally, the portion of the display panel also includes a touch structure located on the side of the encapsulation layer EN away from the substrate BS and on the side of the first cladding layer OC1 close to the substrate BS.

[0181] In some embodiments, in a portion of the display panel having a plurality of second pixels, the orthographic projection of the first black matrix BM1 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS; the orthographic projection of the second black matrix BM2 onto the substrate BS at least partially overlaps with the orthographic projection of the pixel defining layer PDL onto the substrate BS.

[0182] In some embodiments, the lens layer LEL includes a plurality of lenses. In some embodiments, in a portion of the display panel having a plurality of second pixels, the orthographic projection of each of the plurality of lenses onto the substrate BS at least partially overlaps with the orthographic projection of the second light-emitting element LE2 onto the substrate. The inventors of this disclosure have discovered that by providing the lens layer LEL, brightness attenuation can be further reduced.

[0183] Figure 33 Various parameters in a display panel according to some embodiments of this disclosure are shown. Figure 34 Various parameters in a display panel according to some embodiments of this disclosure are shown. Figure 35Various parameters in a display panel according to some embodiments of this disclosure are shown. Figure 36 Various parameters in a display panel according to some embodiments of this disclosure are shown. (Refer to...) Figures 33 to 36 The portion of the first black matrix BM1 located between two adjacent sub-pixels has a third width w3 along a plane that intersects with the two adjacent sub-pixels and the portion of the first black matrix BM1 and is perpendicular to the surface of the substrate BS. The portion of the second black matrix BM2 located between the same two adjacent sub-pixels has a fourth width w4 along a plane that intersects with the two adjacent sub-pixels and the portion of the second black matrix BM2 and is perpendicular to the surface of the substrate BS. The first sub-pixel has a first sub-pixel width d1 along a plane that intersects with the portion of the two adjacent sub-pixels and the pixel defining layer PDL and is perpendicular to the surface of the substrate. The second sub-pixel has a second sub-pixel width d2 along a plane that intersects with the portion of the two adjacent sub-pixels and the pixel defining layer PDL and is perpendicular to the surface of the substrate BS. The third sub-pixel has a third sub-pixel width d3 along a plane that intersects with the portion of the two adjacent sub-pixels and the pixel defining layer PDL and is perpendicular to the surface of the substrate BS. The first black matrix BM1 is spaced apart from the corresponding sub-pixel by a distance h1. The second black matrix BM2 is spaced apart from the first black matrix BM1 by a distance h2. The emission angle θ of each sub-pixel satisfies arctanθ=d / (h1+h2), where d is the width of each sub-pixel along a plane that intersects with the portion of the two adjacent sub-pixels and the pixel definition layer PDL and is perpendicular to the surface of the substrate. Figure 33 The display panel depicted does not include the lens layer. Figures 34 to 36 The display panel depicted includes a lens layer.

[0184] Figure 37 The correlation between luminance attenuation and viewing angle is illustrated in some embodiments according to this disclosure. In Embodiment 4, d1 = d2 = d3 = 9.5 μm; w3 = 7 μm; w4 = 5 μm; h1 = 12 μm; h2 = 7 μm; and θ is 28.9 degrees. As shown in Embodiment 4, when the viewing angle increases from 0 degrees to 40 degrees, the luminance attenuation decreases to near zero.

[0185] In Example 5, d1 = d2 = d3 = 9.5 μm; w3 = 7 μm; w4 = 5 μm; h1 = 12 μm; h2 = 7 μm; and θ is 28.9 degrees. The diameter of the bottom surface of each lens is 14.3 μm. The spacing between the lenses is 2.2 μm. The height of each lens is 5 μm. The refractive index of each lens is 1.7. The refractive index of one or more insulating layers in direct contact with each lens is 1.53.

[0186] In Example 6, d1 = d2 = d3 = 9.5 μm; w3 = 5 μm; w4 = 5 μm; h1 = 12 μm; h2 = 11 μm; and θ is 24.5 degrees. The diameter of the bottom surface of each lens is 14.3 μm. The spacing between the lenses is 2.2 μm. The height of each lens is 5 μm. The refractive index of each lens is 1.7. The refractive index of one or more insulating layers in direct contact with each lens is 1.53.

[0187] In Example 7, d1 = d2 = d3 = 9.5 μm; w3 = 5 μm; w4 = 5 μm; h1 = 12 μm; h2 = 11 μm; and θ is 24.5 degrees. The diameter of the bottom surface of each lens is 14.3 μm. The spacing between the lenses is 2.2 μm. The height of each lens is 5 μm. The refractive index of each lens is 1.7. The refractive index of one or more insulating layers in direct contact with each lens is 1.53.

[0188] As shown in Examples 5 to 7, when the viewing angle increases from 0 degrees to an angle of less than 40 degrees (e.g., from 25 degrees to 40 degrees), the brightness attenuation decreases to near zero.

[0189] On the other hand, this disclosure provides a display device including the display panel described herein and one or more integrated circuits connected to the display panel. Examples of suitable display devices include, but are not limited to, electronic paper, mobile phones, tablet computers, televisions, monitors, laptop computers, digital photo albums, GPS, etc.

[0190] For illustrative and descriptive purposes, the foregoing description of embodiments of the invention has been provided. It is not exhaustive, nor is it intended to limit the invention to the precise forms or exemplary embodiments disclosed. Therefore, the foregoing description should be considered illustrative rather than restrictive. Clearly, many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to explain the principles of the invention and its best mode of practical application, thereby enabling those skilled in the art to understand the various embodiments of the invention and the various modifications suitable for the particular use or implementation contemplated. The scope of the invention is intended to be defined by the appended claims and their equivalents, wherein, unless otherwise stated, all terms are to be interpreted in their broadest reasonable sense. Therefore, the terms “the invention,” “the present invention,” etc., do not necessarily limit the scope of the claims to the specific embodiments, and references to exemplary embodiments of the invention do not imply limitation of the invention, nor should such limitation be inferred. The invention is defined only by the spirit and scope of the appended claims. Furthermore, these claims may involve the use of “first,” “second,” etc., followed by nouns or elements. These terms should be understood as nomenclature and should not be construed as limiting the number of elements modified by these nomenclatures unless a specific number has been given. Any advantages and benefits described may not apply to all embodiments of the invention. It should be understood that changes to the described embodiments can be made by those skilled in the art without departing from the scope of the invention as defined by the appended claims. Furthermore, the elements and components in this disclosure are not intended for public distribution, whether or not they are expressly recited in the appended claims.

Claims

1. A display panel, comprising: Multiple first pixels; Multiple second pixels; First black matrix; The second black matrix; Wherein, the first black matrix is ​​at least partially disposed in the region having the plurality of first pixels and the region having the plurality of second pixels; and The second black matrix is ​​at least partially disposed in the region having the plurality of second pixels, and at least partially not disposed in the region having the plurality of first pixels; The second black matrix is ​​not substantially set in the region having the plurality of first pixels; In the region having the plurality of first pixels, the orthographic projection of the first black matrix onto the substrate and the orthographic projection of the second black matrix onto the substrate substantially do not overlap; and In the region having the plurality of second pixels, the orthographic projection of the first black matrix on the substrate and the orthographic projection of the second black matrix on the substrate at least partially overlap; The display panel further includes a pixel defining layer, which defines a plurality of first sub-pixel openings in the region having the plurality of first pixels and a plurality of second sub-pixel openings in the region having the plurality of second pixels; In the region having the plurality of first pixels, the portion of the first black matrix located between two adjacent sub-pixels has a first width along a plane intersecting the two adjacent sub-pixels and the portion of the first black matrix and perpendicular to the surface of the substrate; the portion of the pixel defining layer located between the same two adjacent sub-pixels has a second width along a plane intersecting the two adjacent sub-pixels and the portion of the pixel defining layer and perpendicular to the surface of the substrate, the second width being greater than the first width; and In the region having the plurality of second pixels, the portion of the first black matrix located between two adjacent sub-pixels has a third width along a plane that intersects the two adjacent sub-pixels and the portion of the first black matrix and is perpendicular to the surface of the substrate. The portion of the pixel defining layer located between the same two adjacent sub-pixels has a fifth width along a plane that intersects the two adjacent sub-pixels and the portion of the pixel defining layer and is perpendicular to the surface of the substrate. The third width is substantially the same as the fifth width.

2. The display panel according to claim 1, wherein, The second black matrix includes multiple bars; The display panel includes multiple slits; The plurality of strips and the plurality of slits are arranged alternately; Two adjacent strips of the plurality of strips are separated by slits of the plurality of slits; as well as Two adjacent slits in the plurality of slits are separated by strips in the plurality of strips.

3. The display panel according to claim 1, wherein, In the region having the plurality of second pixels, the portion of the second black matrix located between the same two adjacent sub-pixels has a fourth width along a plane intersecting the two adjacent sub-pixels and the portion of the second black matrix and perpendicular to the surface of the substrate; and The fourth width is greater than the fifth width.

4. The display panel according to claim 1, wherein, In the region having the plurality of second pixels, the portion of the second black matrix located between the same two adjacent sub-pixels has a fourth width along a plane intersecting the two adjacent sub-pixels and the portion of the second black matrix and perpendicular to the surface of the substrate; and The fourth width is substantially the same as the fifth width.

5. The display panel according to any one of claims 1 to 4, comprising: Multiple first openings extend through the first black matrix; Multiple second openings extend through the first black matrix; as well as Multiple third openings extend through the second black matrix; The plurality of first openings are configured to allow light emitted from a plurality of first light-emitting elements in a plurality of first sub-pixels to pass through; The plurality of second openings are configured to allow light emitted from a plurality of second light-emitting elements in a plurality of second sub-pixels to pass through; as well as The plurality of third openings are configured to allow light emitted from the plurality of second light-emitting elements in the plurality of second sub-pixels to pass through; In the portion of the display panel having the plurality of second pixels, a second opening configured to allow light emitted from a second light-emitting element to pass through has a first opening width along a plane intersecting with two adjacent second sub-pixels and perpendicular to the surface of the substrate, and a third opening configured to allow light emitted from the same second light-emitting element to pass through has a second opening width along the plane intersecting with the two adjacent second sub-pixels and perpendicular to the surface of the substrate.

6. The display panel according to claim 5, wherein, The width of the first opening is greater than the width of the second opening.

7. The display panel according to claim 5, wherein, The orthographic projection of the edge of the second opening onto the substrate substantially surrounds the orthographic projection of the edge of the third opening onto the substrate.

8. The display panel according to claim 5, wherein, The width of the first opening and the width of the second opening are substantially the same.

9. The display panel according to claim 5, wherein, The orthographic projection of the edge of the second opening onto the substrate is substantially the same as the orthographic projection of the edge of the third opening onto the substrate.

10. The display panel according to claim 1, wherein, The region having the plurality of second pixels further includes: An insulating layer that separates the first black matrix and the second black matrix; and A light control structure that extends at least partially through the insulating layer; The light control structure is connected to a portion of the first black matrix and to a portion of the second black matrix.

11. The display panel according to any one of claims 1 to 4, wherein, The second black matrix comprises multiple sub-layers; Two adjacent sublayers of the plurality of sublayers are separated by an insulating layer; and The orthographic projections of the plurality of sublayers onto the substrate substantially overlap each other.

12. The display panel according to any one of claims 1 to 4, further comprising a lens layer, the lens layer comprising a plurality of lenses; in, In the region having the plurality of second pixels, the orthographic projection of each of the plurality of lenses onto the substrate at least partially overlaps with the orthographic projection of the second light-emitting element onto the substrate.

13. The display panel according to claim 12, comprising: First covering layer; The plurality of lenses and the first black matrix are located on the first cladding layer; A second cladding layer is located on the side of the plurality of lenses and the first black matrix that is away from the first cladding layer; and The second black matrix is ​​located on the side of the second cladding layer away from the plurality of lenses and the first black matrix.

14. The display panel according to claim 12, comprising: First covering layer; The first black matrix is ​​located on the first covering layer; A second coating layer is located on the side of the first black matrix away from the first coating layer; and The plurality of lenses and the second black matrix are located on the side of the second cladding layer away from the first black matrix.

15. The display panel according to claim 12, comprising: First covering layer; The first black matrix is ​​located on the first covering layer; The second coating layer is located on the side of the first black matrix that is away from the first coating layer; as well as The second black matrix is ​​located on the side of the second coating layer that is away from the first black matrix; A third coating layer is located on the side of the second black matrix that is away from the second coating layer; and The plurality of lenses are located on the side of the third cladding layer away from the second black matrix.

16. The display panel according to any one of claims 1 to 4, comprising a plurality of alternating first pixel rows and a plurality of second pixel rows; Two adjacent first pixel rows in the plurality of first pixel rows are separated by a single second pixel row in the plurality of second pixel rows; Two adjacent second pixel rows in the plurality of second pixel rows are separated by a single first pixel row in the plurality of first pixel rows; Each of the plurality of first pixel rows includes a plurality of pixels among the plurality of first pixels; Each of the plurality of second pixel rows includes a plurality of second pixels among the plurality of second pixels; Each of the plurality of first pixels includes a first sub-pixel, a second sub-pixel, and a third sub-pixel; and Each of the plurality of second pixels includes a plurality of fourth sub-pixels, a plurality of fifth sub-pixels, and a plurality of sixth sub-pixels.

17. A display panel, comprising: Multiple first pixels; Multiple second pixels; First black matrix; The second black matrix; In the region having the plurality of first pixels, the orthographic projection of the first black matrix on the substrate and the orthographic projection of the second black matrix on the substrate do not substantially overlap. as well as In the region having the plurality of second pixels, the orthographic projection of the first black matrix on the substrate at least partially overlaps with the orthographic projection of the second black matrix on the substrate.

18. A display device comprising a display panel according to any one of claims 1 to 17, and one or more integrated circuits connected to the display panel.

Images