Display panel and display device

Abstract

This disclosure provides a display panel and a display device. The display panel includes a substrate, multiple light-emitting groups, and at least one black matrix. The multiple light-emitting groups are disposed on one side of the substrate, each light-emitting group comprising multiple light-emitting units of various colors spaced apart from each other, arranged along a first direction or a second direction. The first light-emitting unit is the largest light-emitting unit in the first direction within the light-emitting group, and includes at least two sub-light-emitting units spaced apart along the first direction. The black matrix is ​​disposed on the side of the light-emitting group away from the substrate, and includes at least one first light-shielding strip extending along the first direction, whose orthographic projection overlaps with the orthographic projection of the first light-emitting unit. This disclosure reduces the size of individual sub-light-emitting units by dividing the first light-emitting unit, thereby reducing the proportion of light-shielding units obstructed by the light-shielding strip, mitigating brightness decay at small / medium viewing angles, improving color shift, and simultaneously ensuring privacy protection in the second direction, thus balancing privacy protection and display color consistency.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] With the popularization of smart terminals and the diversification of application scenarios, display devices have been widely used in various fields. Users' demand for screen privacy protection is becoming increasingly urgent, and anti-spy function has become one of the core requirements.

[0003] However, existing privacy protection technologies often compromise the display quality of devices while achieving privacy protection, thus reducing the user experience. Meanwhile, users' demands for display quality are constantly increasing, especially in specific application scenarios such as automotive displays, where display quality directly impacts both user experience and security.

[0004] Therefore, how to maximize the display effect of display devices while achieving effective privacy protection has become a pressing technical challenge in the field of display technology. Summary of the Invention

[0005] In view of the above problems, this disclosure provides a display panel and display device. By dividing the first light-emitting unit, which has the largest size in the first direction, into at least two sub-light-emitting units along the first direction, the proportion of the overall light-emitting area of ​​the first light-emitting unit can be increased. While ensuring the privacy protection effect at a large viewing angle, the brightness decay rate at small / medium viewing angles can be reduced, and color deviation can be improved.

[0006] In a first aspect, a display panel is provided, comprising: Substrate; Multiple light-emitting groups are disposed on one side of the substrate; each light-emitting group includes multiple light-emitting units of various light-emitting colors that are spaced apart from each other, and the multiple light-emitting units are arranged at intervals along a first direction or a second direction, wherein the first direction and the second direction are two intersecting directions parallel to the substrate; wherein, the first light-emitting unit includes at least two sub-light-emitting units arranged at intervals along the first direction, and the first light-emitting unit is the light-emitting unit with the largest size in the first direction in the light-emitting group. At least one black matrix is ​​disposed on the side of the plurality of light-emitting units away from the substrate; the black matrix includes at least one first light-shielding strip extending along the first direction, and the orthographic projection of the first light-shielding strip on the substrate overlaps with the orthographic projection of the first light-emitting unit on the substrate.

[0007] In some embodiments, in the first direction, the orthogonal projection of the first light-shielding strip on the substrate does not exceed the orthogonal projection of the first light-emitting unit on the substrate.

[0008] In some embodiments, the first light-emitting unit includes a first sub-light-emitting unit and a second sub-light-emitting unit arranged at intervals along a first direction; the first light-shielding strip includes a first sub-light-shielding strip and a second light-shielding strip arranged at intervals along the first direction. The orthographic projection of the first sub-light-shielding strip on the substrate overlaps with the orthographic projection of the first sub-light-emitting unit on the substrate; the orthographic projection of the second sub-light-shielding strip on the substrate overlaps with the orthographic projection of the second sub-light-emitting unit on the substrate. In the first direction, the orthogonal projection of the first sub-light-shielding strip on the substrate does not exceed the orthogonal projection of the first sub-light-emitting unit on the substrate, and the orthogonal projection of the second sub-light-shielding strip on the substrate does not exceed the orthogonal projection of the second sub-light-emitting unit on the substrate.

[0009] In some embodiments, the display panel includes at least two layers of the black matrix, and the size of the first light-shielding strip in the at least two layers of the black matrix decreases layer by layer in the second direction along a direction away from the substrate.

[0010] In some embodiments, the black matrix includes at least one second light-shielding strip extending along the first direction, wherein the orthographic projection of the second light-shielding strip on the substrate overlaps with the orthographic projection of the second light-emitting unit on the substrate, and in the first direction, the orthographic projection of the second light-shielding strip on the substrate exceeds the orthographic projection of the second light-emitting unit on the substrate. The second light-emitting unit is the smallest light-emitting unit in the first direction among the light-emitting units.

[0011] In some embodiments, the black matrix includes at least one second light-shielding strip extending along the first direction, wherein the orthographic projection of the second light-shielding strip on the substrate overlaps with the orthographic projection of the second light-emitting unit on the substrate, and the size of the second light-shielding strip in the second direction is larger than the size of the first light-shielding strip in the second direction; The second light-emitting unit is the smallest light-emitting unit in the first direction among the light-emitting units.

[0012] In some embodiments, the plurality of light-emitting units in the plurality of light-emitting groups are arranged in a plurality of light-emitting rows along the second direction, and each light-emitting row includes a plurality of light-emitting units arranged along the first direction; The black matrix includes a plurality of main light-shielding strips extending along the first direction, and the orthographic projection of the main light-shielding strips on the substrate overlaps with the orthographic projection of the gap between two adjacent light-emitting rows on the substrate.

[0013] In some embodiments, in two adjacent rows of light emission, the plurality of light emission units in one row of light emission are all the first light emission units, and the plurality of light emission units in the other row of light emission include alternating second light emission units and third light emission units, wherein the first light emission unit is used to emit a first color light, the second light emission unit is used to emit a second color light, and the third light emission unit is used to emit a third color light.

[0014] In some embodiments, the black matrix includes at least one third light-shielding strip extending along the first direction, wherein the orthographic projection of the third light-shielding strip on the substrate overlaps with the orthographic projection of the third light-emitting unit on the substrate; and in the first direction, the orthographic projection of the third light-shielding strip on the substrate does not exceed the orthographic projection of the third light-emitting unit on the substrate.

[0015] In a second aspect, a display device is provided, comprising a display panel as described in the first aspect above.

[0016] The technical solutions provided in this disclosure have at least the following technical effects or advantages: In the display panel and display device provided in this disclosure, when the privacy protection direction is the second direction, the larger the size of the light-emitting unit in the first direction, the larger the proportion of the area of ​​the light-emitting unit blocked by the first light-shielding strip and the smaller the proportion of the light-emitting area. At small / medium viewing angles between the first and second directions, the brightness decay rate of the light-emitting unit is greater. Since the first light-emitting unit has the largest size in the first direction, its brightness decay rate is even greater at small / medium viewing angles, making it prone to color shift. Therefore, this disclosure, by setting the first light-emitting unit to include at least two sub-light-emitting units spaced apart along the first direction, effectively divides the first light-emitting unit into at least two parts in the first direction. Each individual sub-light-emitting unit has a smaller size in the first direction, a smaller proportion of the area blocked by the first light-shielding strip, and a larger proportion of the light-emitting area. This increases the overall proportion of the light-emitting area of ​​the first light-emitting unit, reduces its brightness decay rate at small / medium viewing angles, and improves the color shift problem caused by the excessively rapid brightness decay of the first light-emitting unit at small / medium viewing angles. Furthermore, when viewing the screen in the second direction (i.e., the privacy protection direction), the first light-emitting unit is most affected by the first light-shielding strip, and its large-viewing-angle light emission can be effectively blocked to ensure its privacy protection function. In other words, this disclosure achieves privacy protection in the second direction of the display panel while ensuring the display effect and color consistency of the display panel.

[0017] The above description is merely an overview of the technical solution disclosed herein. In order to better understand the technical means of this disclosure and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure are described below. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a partial cross-sectional view of a display panel provided by related technologies; Figure 2 This is a top view of a display panel provided by related technologies; Figure 3 This is a brightness attenuation characteristic diagram of a display panel provided in related technologies; Figure 4 This is a schematic diagram of color deviation in a display panel provided by related technologies; Figure 5 It is a colorimetric diagram of a display panel provided by related technologies; Figure 6 This is a schematic diagram illustrating the effect of a black matrix on the light emission of a light-emitting part according to an embodiment of this disclosure; Figure 7 This is a top view schematic diagram of a display panel provided in an embodiment of this disclosure; Figure 8 This is one of the partial cross-sectional views of a display panel along a first direction H provided in this embodiment of the disclosure; Figure 9 This is one of the partial cross-sectional views of a display panel along the second direction V provided in the embodiments of this disclosure; Figure 10 This is one of the brightness attenuation characteristic diagrams of a display panel provided in this disclosure embodiment; Figure 11 This is one of the chromaticity diagrams of a display panel provided in this embodiment of the present disclosure; Figure 12 This is one of the color contrast diagrams of a display panel provided in this embodiment of the present disclosure; Figure 13 This is a second partial cross-sectional view of a display panel along the first direction H provided in an embodiment of this disclosure; Figure 14 This is a second partial cross-sectional view of a display panel along the second direction V provided in an embodiment of this disclosure; Figure 15 This is a top view of another display panel provided in an embodiment of this disclosure; Figure 16 This is a partial cross-sectional view along the first direction H of another display panel provided in this embodiment of the present disclosure; Figure 17This is a top view of yet another display panel provided in this embodiment of the disclosure; Figure 18 This is a partial cross-sectional view along the second direction V of another display panel provided in this disclosure embodiment; Figure 19 This is a top view of another display panel provided in an embodiment of this disclosure; Figure 20 This is the second of the brightness attenuation characteristic diagrams of a display panel provided in this embodiment; Figure 21 This is a second chromaticity diagram of a display panel provided in this embodiment of the present disclosure; Figure 22 This is the second color contrast diagram of a display panel provided in this embodiment of the present disclosure; Figure 23 This is a third partial cross-sectional view of a display panel along the first direction H provided in this embodiment of the present disclosure; Figure 24 This is a third partial cross-sectional view of a display panel along the second direction V provided in an embodiment of this disclosure. Detailed Implementation

[0019] To better understand the above technical solutions, the following will describe the above technical solutions in detail with reference to the accompanying drawings and specific implementation methods. It should be understood that the embodiments of this disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of this disclosure, rather than limitations on the technical solutions of this disclosure. In the absence of conflict, the embodiments of this disclosure and the technical features in the embodiments can be combined with each other.

[0020] Organic light-emitting diodes (OLEDs) have been widely used in display technologies such as automotive displays. However, due to the wide viewing angle of OLED displays, windshield reflections can easily occur on automotive display panels, interfering with the driver's vision and posing a safety hazard. Furthermore, the display area can be easily viewed from the side, posing a risk of information leakage.

[0021] Existing automotive OLED display solutions typically integrate structures such as a black matrix (BM) and an edge emission structure (EES) on the device side. This allows for rapid brightness decay in one direction to prevent privacy, while the light emission in another direction remains largely unaffected. However, such solutions generally prioritize privacy performance, often at the expense of display quality, resulting in noticeable viewpoint distortion at certain viewing angles.

[0022] Figure 1 This is a partial cross-sectional view of a display panel provided by related technologies. Figure 2This is a top view of a display panel provided by related technologies, such as... Figure 1 and Figure 2 As shown, the display panel 100 provided in the related art typically includes a substrate 110 and a plurality of light-emitting groups 120 disposed on one side of the substrate 110. The light-emitting group 120 includes a plurality of light-emitting units 121 of various colors and arranged at intervals between each other. Figure 1 The diagram shows a light-emitting group 120 including a green light-emitting unit 121a, a red light-emitting unit 121b, and a blue light-emitting unit 121c. Since the human eye is more sensitive to the brightness of green light and relatively less sensitive to the brightness of blue and red light, to ensure that the frontal brightness meets the standard, the light-emitting area of ​​the green light-emitting unit 121a is usually set to the largest, followed by the blue light-emitting unit 121c, and the light-emitting area of ​​the red light-emitting unit 121b is set to the smallest.

[0023] In this arrangement, multiple light-emitting units 121 can be arrayed along a first direction H and a second direction V on one side of the substrate 110. To achieve privacy protection in the second direction V, related technologies typically divide each light-emitting unit 121 into multiple light-emitting portions 1211, which are arranged at intervals along the second direction V. Each light-emitting portion 1211 extends along the first direction H, and a first gap g1 is formed between adjacent light-emitting portions 1211 in the second direction V, while a second gap g2 is formed between adjacent light-emitting units in the first direction H. Simultaneously, at least two black matrices 130 are formed on the side of the display panel 100 away from the substrate 110. The at least two black matrices 130 are arranged at intervals along a third direction Z perpendicular to the substrate 110. The orthographic projection of the black matrices 130 on the substrate 110 overlaps with the orthographic projection of the first gap g1 to block the large-angle light emitted in the second direction V, causing the brightness in this direction to decrease rapidly as the viewing angle increases, thereby achieving the effects of privacy protection and suppressing windshield reflection. The orthographic projection of the black matrices 130 does not overlap with the orthographic projection of the second gap g2 to ensure that the light in the first direction H is emitted normally and to maintain the normal display viewing angle in this direction.

[0024] Figure 3 This is a brightness attenuation characteristic diagram of a display panel provided in related technologies, such as... Figure 3 As shown in the figure, the horizontal axis represents the viewing angle, indicating the angle between the observer and the normal direction of the display panel. 0° is the frontal viewing angle (direction), negative values ​​(-80 to 0°) are the left-side viewing angle, and positive values ​​(0 to 80°) are the right-side viewing angle. The vertical axis represents the relative brightness percentage, which is the percentage value relative to the brightness at the frontal viewing angle (0°). This characterizes the degree of brightness attenuation; the lower the value, the more severe the attenuation and the worse the visibility. Figure 3It can be seen that the light emitted by the display panel in the second direction V is strongly blocked by the black matrix 130, and the brightness at a wide viewing angle will quickly decrease to less than 5%, with almost no light emitted, thus achieving the privacy protection effect; the light emitted in the first direction H is not blocked by the black matrix and has a wider viewing angle.

[0025] However, in the aforementioned privacy display panel, the applicant discovered that the display panel's color appeared pinkish at certain angles. Figure 4 This is a schematic diagram of color shift in a display panel provided by related technologies, such as... Figure 4 As shown, at a normal viewing angle (i.e., the angle between the observer's line of sight and the normal direction of the display panel is 0°), the display panel appears white; while at a viewing angle φ on one side (i.e., the angle between the observer's line of sight and the normal direction of the display panel is φ), some areas of the display panel appear pinkish. Figure 5 It is a colorimetric diagram of a display panel provided by related technologies, such as Figure 5 As shown, this figure is a CIE 1931 chromaticity diagram, used to characterize the color shift of a display panel under different viewing angles (φ angle). The horizontal axis represents the x-chromaticity coordinate in the CIE 1931 color space, representing the proportion of red (R) in the color perceived by the human eye; the vertical axis represents the y-chromaticity coordinate in the CIE 1931 color space, representing the proportion of green (G) in the color perceived by the human eye. The figure shows that when the φ angle is 50°, the chromaticity coordinates of the display panel shift significantly along the trajectory towards increasing x and decreasing y, with a significant increase in the chromaticity shift value at large viewing angles. Furthermore, the trajectory direction at this viewing angle differs significantly from the 0° direct viewing state. For large-size display panels, this manifests as color deviation from the baseline state in different areas, resulting in obvious color shift, directly affecting the consistency of the displayed image and the visual experience, demonstrating the color degradation problem caused by viewing angle deviation under privacy protection design.

[0026] Based on the above issues, the applicant discovered that: when φ=0°, i.e., when observing the screen in the first direction H (non-peeping direction), the pixels are completely unaffected by the black matrix; when φ=90°, i.e., when observing the screen in the second direction V (peeping direction), the peeping effect is best, and the influence of the black matrix is ​​greatest. Furthermore, within the φ angle between 0° and 90°, the larger the size b of the light-emitting part 1211 of each light-emitting unit in the first direction H, the greater the degree of influence from the black matrix.

[0027] Figure 6 This is a schematic diagram illustrating the effect of a black matrix on the light emission of a light-emitting part according to an embodiment of this disclosure, as shown below. Figure 6As shown, at an intermediate viewing angle φ between 0° and 90°, the light emitted by the light-emitting part 1211 of the light-emitting unit 121 needs to be emitted at an angle to be observed. At this time, the black matrix 130 blocks the light emitted by the light-emitting part 1211: the intersection of the light propagation path and the edge of the black matrix 130 divides the light-emitting part 1211 into a blocked area and a light-emitting area. Assuming the size of the affected (blocked) portion of the light-emitting part 1211 in the first direction H is x, then x = ba / tanφ, where b is the total size of a single light-emitting part 1211 in the first direction H (see...). Figure 2 Let a be the minimum distance in the second direction V between the orthographic projection of the light-emitting part 1211 on the substrate 110 and the orthographic projection of the black matrix 130 on the substrate 110. In this case, the degree to which the light-emitting part is affected by the black matrix 130 can be characterized by the ratio x / b of the obscured dimension to the total dimension. x / b = 1 - (a / tanφ) * (1 / b); As can be seen from the above formula, at a certain fixed angle φ, the larger b is, the larger the x / b ratio is, which means that the light-emitting part 1211 is blocked by the black matrix to a greater extent. In conventional privacy designs, in order to ensure that the front brightness meets the standard, the size of the light-emitting part of the green light-emitting unit 121b in the first direction H is much larger than the size of the light-emitting parts of the red light-emitting unit 121a and the blue light-emitting unit 121c in the first direction H. Therefore, at the same intermediate viewing angle φ, the green light-emitting unit 121b is blocked by the black matrix 130 to a much greater extent than the red light-emitting unit 121a and the blue light-emitting unit 121c. This causes the brightness of the green light to decay much faster in the second direction than that of the red and blue light, and finally presents a noticeable pinkish tint at a specific viewing angle, degrading the display effect.

[0028] Therefore, to solve the aforementioned technical problems, the inventors of this disclosure provide a display panel. For the first light-emitting unit, which has the largest size in the first direction H within the light-emitting group, the first light-emitting unit is divided into at least two sub-light-emitting units arranged at intervals along the first direction. Each sub-light-emitting unit has a smaller size in the first direction H, a smaller proportion of the area obscured by the black matrix, and a larger proportion of the light-emitting area. This increases the overall light-emitting area (x / b) of the first light-emitting unit, reduces its brightness decay rate at small / medium viewing angles, and improves the color shift problem caused by the rapid brightness decay of the first light-emitting unit at small / medium viewing angles. Furthermore, when viewing the screen in the second direction V (i.e., the privacy direction), the first light-emitting unit is most affected by the black matrix obscuration, and its light emission at large viewing angles can be effectively blocked to ensure its privacy function.

[0029] Figure 7 This is a top view schematic diagram of a display panel provided in an embodiment of this disclosure. Figure 8 This is one of the partial cross-sectional views of a display panel along a first direction H provided in this embodiment of the disclosure, such as... Figure 7and Figure 8 As shown, the display panel 200 includes a substrate 210, a plurality of light-emitting groups 220, and at least one black matrix 230. The plurality of light-emitting groups 220 are disposed on one side of the substrate 210. Each light-emitting group 220 includes a plurality of light-emitting units 221 of various emitting colors spaced apart from each other. The plurality of light-emitting units 221 are arranged at intervals along a first direction H or a second direction V, where the first direction H and the second direction V are two intersecting directions parallel to the substrate 210. A first light-emitting unit 221a includes at least two sub-light-emitting units arranged at intervals along the first direction H, and the first light-emitting unit 221a is the largest light-emitting unit in the light-emitting group 220 along the first direction H. At least one black matrix 230 is disposed on the side of the plurality of light-emitting groups 220 away from the substrate 210. The black matrix 230 includes at least one first light-shielding strip 231 extending along the first direction H, and the orthographic projection of the first light-shielding strip 231 on the substrate 210 overlaps with the orthographic projection of the first light-emitting unit 221a on the substrate 210.

[0030] For example, the second direction V can be perpendicular to the first direction H. Multiple light-emitting units 221 can be arranged in an array along the first direction H and the second direction V on one side of the substrate 210.

[0031] In some embodiments, see Figure 7 Multiple light-emitting units 221 in multiple light-emitting groups 220 are arranged into multiple light-emitting rows 220a along the second direction V. Each light-emitting row 220a includes multiple light-emitting units 221 arranged along the first direction H. The black matrix 230 includes multiple main light-shielding strips 230a extending along the first direction H. The orthographic projection of the main light-shielding strips 230a on the substrate 210 overlaps with the orthographic projection of the gap a0 between two adjacent light-emitting rows 220a on the substrate 210. The main light-shielding strips 230a are used to block the gap area between adjacent light-emitting rows 220a, preventing stray light from escaping between adjacent light-emitting rows, further improving the privacy effect and display contrast of the display panel in the second direction V, while not affecting the normal display viewing angle in the first direction H, ensuring the display effect of the screen.

[0032] In some embodiments, in two adjacent light-emitting rows 220a, the plurality of light-emitting units 221 in one row of light-emitting row 220a are all first light-emitting units 221a, and the plurality of light-emitting units 221 in the other row of light-emitting row 220a include alternately arranged second light-emitting units 221b and third light-emitting units 221c. The first light-emitting unit 221a is used to emit a first color light, the second light-emitting unit 221b is used to emit a second color light, and the third light-emitting unit 221c is used to emit a third color light.

[0033] The multiple light-emitting units in the light-emitting group 220 can use various color combinations and are not limited to a single combination. The design principle is that the light-emitting unit with the largest size in the first direction H adopts a structure divided into at least two sub-light-emitting units, preferably with a matching... Figure 8 and Figure 9 The structural design may include, but is not limited to, the following situations: the first light-emitting unit 221a is a green light-emitting unit, the second light-emitting unit 221b is a red light-emitting unit, and the third light-emitting unit 221c is a blue light-emitting unit; the first light-emitting unit 221a is a blue light-emitting unit, the second light-emitting unit 221b is a red light-emitting unit, and the third light-emitting unit 221c is a green light-emitting unit; the first light-emitting unit 221a is a red light-emitting unit, the second light-emitting unit 221b is a green light-emitting unit, and the third light-emitting unit 221c is a blue light-emitting unit; the first light-emitting unit 221a is a red light-emitting unit, the second light-emitting unit 221b is a blue light-emitting unit, and the third light-emitting unit 221c is a green light-emitting unit; the first light-emitting unit 221a is a blue light-emitting unit, the second light-emitting unit 221b is a green light-emitting unit, and the third light-emitting unit 221c is a red light-emitting unit; the first light-emitting unit 221a is a green light-emitting unit, the second light-emitting unit 221b is a blue light-emitting unit, and the third light-emitting unit 221c is a red light-emitting unit; the first light-emitting unit 221a is a green light-emitting unit, the second light-emitting unit 221b is a blue light-emitting unit, and the third light-emitting unit 221c is a red light-emitting unit. Regardless of the color combination used, as long as the first light-emitting unit 221a is the largest light-emitting unit in the first direction H of the light-emitting group 220, the problem of its brightness decaying too quickly at small / mid-view angles can be improved through the segmentation structure disclosed herein, thereby alleviating color shift.

[0034] For example, in the display panel provided in this disclosure, the first light-emitting unit 221a is a green light-emitting unit, and the green light-emitting unit has the largest size in the first direction H; the third light-emitting unit 221c is a blue light-emitting unit, and the blue light-emitting unit has the second largest size in the first direction H; the second light-emitting unit 221b is a red light-emitting unit, and the red light-emitting unit has the smallest size in the first direction H. Dividing the green-emitting first light-emitting unit 221a into multiple sub-light-emitting units along the first direction H can solve the problem of pinkish tint in the display panel.

[0035] In some embodiments, the first light-emitting unit 221a includes a first sub-light-emitting unit 2211a and a second sub-light-emitting unit 2212a arranged at intervals along a first direction H. The size of the first light-emitting unit 221a in the first direction H is b1, b1 = b11 + b12, where b11 is the size of the first sub-light-emitting unit 2211a in the first direction H, and b12 is the size of the second sub-light-emitting unit 2212a in the first direction H. The sizes b11 and b12 of a single sub-light-emitting unit in the first direction H are much smaller than the size of the first light-emitting unit in the first direction H. Therefore, the proportion x / b of the area blocked by the first light-shielding strip 231 of a single sub-light-emitting unit is smaller, and the proportion of the light-emitting area is larger, thereby increasing the proportion of the overall light-emitting area of ​​the first light-emitting unit 221a, reducing its brightness decay rate at small / medium viewing angles, and improving the color shift problem caused by the excessive brightness decay of the first light-emitting unit 221a at small / medium viewing angles.

[0036] For example, the spacing D1 between the first sub-light-emitting unit 2211a and the second sub-light-emitting unit 2212a in the first direction H is 3~6μm. If D1 is too large, it will increase the overall space occupied by the first light-emitting unit 221a in the first direction H, thereby affecting the overall arrangement density of the light-emitting group and causing a decrease in the resolution of the display panel. If D1 is too small, it will have limited effect on improving the proportion of the first light-emitting unit 221a obstructed by the black matrix, and will not be able to give full play to the core role of the segmentation design of the first light-emitting unit 221a, that is, it will not be able to effectively alleviate the brightness attenuation problem of the first light-emitting unit 221a, and thus will not be able to effectively improve the color shift of the display panel.

[0037] It should be noted that the first light-emitting unit 221a may also include multiple sub-light-emitting units arranged at intervals along the first direction H. The number of sub-light-emitting units can be set according to actual display requirements, panel size, and manufacturing precision. By adopting a design with multiple sub-light-emitting units, the size of a single sub-light-emitting unit in the first direction H can be further reduced, the occlusion ratio can be more precisely controlled, the brightness decay trend of the first light-emitting unit can be better matched with the other light-emitting units, the color consistency of each intermediate viewing angle can be optimized, and the large-angle privacy protection effect in the second direction V can still be maintained.

[0038] In some embodiments, in the first direction H, the orthographic projection of the first light-shielding strip 231 on the substrate 210 does not exceed the orthographic projection of the first light-emitting unit 221a on the substrate 210. This design avoids the first light-shielding strip 231 from extending excessively, preventing it from blocking the light emission path of adjacent light-emitting units, ensuring normal light emission of the remaining light-emitting units at various viewing angles, and avoiding problems such as overall brightness reduction and color imbalance caused by excessive shading range of the light-shielding strip.

[0039] In some embodiments, when the first light-emitting unit 221a includes a first sub-light-emitting unit 2211a and a second sub-light-emitting unit 2212a arranged at intervals along a first direction, the first light-shielding strip 231 includes a first sub-light-shielding strip 231a and a second sub-light-shielding strip 231b arranged at intervals along a first direction H. The orthographic projection of the first sub-light-shielding strip 231a on the substrate 210 overlaps with the orthographic projection of the first sub-light-emitting unit 2211a on the substrate 210, and the orthographic projection of the second sub-light-shielding strip 231b on the substrate 210 overlaps with the orthographic projection of the second sub-light-emitting unit 2212a on the substrate 210. In the first direction H, the orthographic projection of the first sub-light-shielding strip 231a on the substrate 210 does not exceed the orthographic projection of the first sub-light-emitting unit 2211a on the substrate 210, and the orthographic projection of the second sub-light-shielding strip 231b on the substrate 210 does not exceed the orthographic projection of the second sub-light-emitting unit 2212a on the substrate 210.

[0040] In other words, the first light-shielding strip 231 is divided along with the first light-emitting unit 221a. This design can ensure that each sub-light-emitting unit is subject to precise light-shielding control, guaranteeing a large-angle privacy protection effect in the second direction V, while also minimizing the obstruction of adjacent sub-light-emitting units by the light-shielding strip. This further improves the overall light-emitting ratio of the first light-emitting unit 221a, achieving a dual balance between the privacy protection performance of the black matrix and the display effect of the display panel.

[0041] In some embodiments, the black matrix 230 includes at least two first light-shielding strips 231 disposed along the second direction V. The at least two first light-shielding strips 231 can partition and block the first light-emitting unit 221a along the second direction V, which can avoid fluctuations in the privacy protection effect caused by uneven blocking by a single light-shielding strip.

[0042] Figure 9 This is one of the partial cross-sectional views of a display panel along the second direction V provided in this disclosure embodiment, such as... Figure 9 As shown, in some embodiments, the display panel 200 includes at least two black matrices 230, and along a third direction Z away from the substrate 210, the size of the first light-shielding strip 231 in the at least two black matrices 230 decreases layer by layer in the second direction V.

[0043] Since the black matrix 230 has a stronger and more concentrated light-blocking effect on a wide viewing angle along the third direction Z away from the substrate 210, while its light-blocking effect on a narrow viewing angle is relatively weak, and the propagation path of light from a wide viewing angle is closer to the outside of the black matrix, by setting the size of the first light-blocking strip 231 to decrease layer by layer in the second direction V, the privacy protection effect on a wide viewing angle will not be weakened, but the light-blocking effect of the first light-blocking strip 231 on light emitted from a narrow viewing angle can be reduced, thereby slowing down the brightness decay of the first light-emitting unit 221a under a narrow viewing angle, and further improving the color shift problem under a narrow viewing angle, thus achieving a dual balance between privacy protection performance and display effect under a narrow viewing angle.

[0044] For example, at least two black matrix layers 230 include a first black matrix layer, a second black matrix layer, and a third black matrix layer arranged sequentially along a third direction Z away from the substrate 210; in the second direction V, the distance d1 between the first light-shielding strip 231 of the second black matrix and the edge of the orthogonal projection of the first light-shielding strip 231 of the first black matrix on the substrate 210 is 1~1.5μm, and the distance d2 between the first light-shielding strip 231 of the third black matrix and the edge of the orthogonal projection of the first light-shielding strip 231 of the second black matrix on the substrate 210 is 1~2μm. Through the aforementioned step-by-step inward shrinkage size design, the first light-shielding strip 231 in the multi-layer black matrix 230 can form a gradient shielding boundary in the second direction V. This ensures that light from a wide viewing angle is reliably blocked and the privacy protection effect remains stable and effective. It also allows for precise control of the transmittance of light from a narrow viewing angle, resulting in a smoother and more uniform brightness decay. This avoids local color shifts or uneven brightness caused by abrupt changes in shielding, further improving the color consistency and display softness of the display panel at different viewing angles. This achieves a better balance between privacy protection performance and frontal and narrow-view display effects.

[0045] In some embodiments, see Figure 9 In the second direction V, there is a gap a01 between the orthographic projection of the main light-shielding strip 230a in at least one layer of black matrix 230 onto the substrate 210 and the orthographic projection of the first light-emitting unit 221a onto the substrate 210. The design of this gap a01 can effectively prevent the main light-shielding strip 230a from excessively blocking the first light-emitting unit 221a, ensuring the light output of the first light-emitting unit 221a at small / medium viewing angles.

[0046] Figure 10 This is one of the brightness attenuation characteristic diagrams of a display panel provided in this disclosure, such as... Figure 10As shown in the figure, the horizontal axis represents the viewing angle, indicating the angle between the observer and the normal direction of the display panel. The vertical axis represents the relative brightness percentage, which is the percentage value relative to the brightness at a normal viewing angle (0°), used to characterize the degree of brightness attenuation. The lower the value, the more severe the attenuation and the worse the visibility. The curve before improvement in the figure is the brightness attenuation trajectory of the green light-emitting unit of the display panel 100 in the second direction V in the related art, and the curve after improvement is the brightness attenuation trajectory of the green light-emitting unit of the display panel 100 in this disclosure. Figure 7 The brightness attenuation trajectory of the first light-emitting unit 221a (i.e., the green light-emitting unit) of the provided display panel 200 in the second direction V. Figure 10 It can be seen that the brightness decay trends of the two curves before and after the improvement are basically the same in the large viewing angle (≥60°) region, both rapidly decaying to less than 5%, with almost no light emitted. This indicates that the technical solution disclosed in this paper does not weaken the privacy protection effect of the display panel in the second direction V, and can still achieve reliable privacy protection. In the small viewing angle (0°~50°) region, the relative brightness of the improved curve is significantly higher than that of the unimproved curve, and the brightness decay rate is significantly slower. This indicates that the display panel design disclosed in this paper effectively reduces the brightness decay (L-Decay) of the first light-emitting unit 221a (i.e., the green light-emitting unit) in the small viewing angle, improves the visibility and brightness uniformity in the small viewing angle, and thus improves the color shift problem caused by the excessive decay of the first light-emitting unit 221a, achieving a dual balance between privacy protection performance and small viewing angle display effect.

[0047] Figure 11 This is one of the chromaticity diagrams of a display panel provided in this embodiment of the disclosure, such as... Figure 11 As shown in the figure, the horizontal axis represents the x-chromaticity coordinate in the CIE 1931 color space, representing the proportion of red (R) component in the color perceived by the human eye; the vertical axis represents the y-chromaticity coordinate in the CIE 1931 color space, representing the proportion of green (G) component in the color perceived by the human eye. Figure 11 It can be seen that when φ is 50°, this disclosure Figure 7 The offset of the 200 chromaticity coordinates of the provided display panel along the trajectory is significantly reduced, with no obvious offset in the direction of increasing x and decreasing y. The color deviation value at large viewing angle is greatly reduced. Moreover, the trajectory direction at this viewing angle is basically consistent with the 0° normal viewing state, and the trajectory fluctuation is smooth. For large-size display panels, the colors in different areas can be close to the reference colors at the normal viewing angle, the color deviation phenomenon is effectively improved, and the consistency of the display and the visual experience are significantly improved.

[0048] Figure 12This is one of the colorimetric comparison diagrams of a display panel provided in this disclosure. The improved φ50° curve represents the colorimetric change trajectory of the display panel 200 provided in this disclosure at a viewing angle of φ=50°, while the unimproved φ50° curve represents the colorimetric change trajectory of the display panel 100 provided in related technologies at a viewing angle of φ=50°. Comparing the two curves, it can be seen that the unimproved φ50° curve is significantly shifted towards increasing x and decreasing y, with a large color deviation value and a significant deviation from the baseline state. In contrast, the improved φ50° curve is closer to the trajectory of the 0° viewing state, with a significantly reduced colorimetric coordinate offset, a significantly lower color deviation value, and a significantly improved color consistency. Therefore, by segmenting the first light-emitting unit 221a, this disclosure effectively improves the problems of severe color deviation and excessively rapid brightness decay in related technologies. While ensuring the privacy function (without changing the black matrix blocking logic), it makes the color performance of the display panel more stable, and significantly improves the consistency of the displayed image and the visual experience.

[0049] In some embodiments, such as Figure 7 As shown, the black matrix 230 includes at least one second light-shielding strip 232 extending along the first direction H. The orthographic projection of the second light-shielding strip 232 on the substrate 210 overlaps with the orthographic projection of the second light-emitting unit 221b on the substrate 210. Furthermore, in the first direction H, the orthographic projection of the second light-shielding strip 232 on the substrate 210 does not exceed the orthographic projection of the second light-emitting unit 221b on the substrate 210. The second light-emitting unit 221b is the smallest light-emitting unit in the light-emitting group 220 in the first direction H.

[0050] Figure 13 This is a second partial cross-sectional view of a display panel along the first direction H provided in this embodiment of the disclosure, such as... Figure 13 As shown, in the first direction H, the edge of the second light-shielding strip 232 is flush with the edge of the second light-emitting unit 221b. Figure 14 This is a second partial cross-sectional view of a display panel along the second direction V provided in this embodiment of the disclosure, such as... Figure 14 As shown, the second light-shielding strips 232 in at least one layer of black matrix 230 have the same size in the second direction V. This design allows the light emitted by the second light-emitting unit 221b in the second direction V to be stably blocked by the second light-shielding strips 232, ensuring its privacy protection effect in the second direction V (privacy protection direction).

[0051] For example, see Figure 14In the second direction V, there is a gap a02 between the orthographic projection of the main light-shielding strip 230a in at least one layer of black matrix 230 onto the substrate 210 and the orthographic projection of the second light-emitting unit 221b onto the substrate 210. The design of this gap a02 can effectively prevent the main light-shielding strip 230a from excessively blocking the second light-emitting unit 221b, ensuring the light output of the second light-emitting unit 221b at small / medium viewing angles.

[0052] In some embodiments, the black matrix 230 includes at least two second light-shielding strips 232 disposed along the second direction V. The at least two second light-shielding strips 232 can partition and block the second light-emitting unit 221b along the second direction V, which can avoid fluctuations in the privacy protection effect caused by uneven blocking by a single light-shielding strip.

[0053] Figure 15 This is a top view of another display panel provided in this embodiment of the disclosure. Figure 16 This is a partial cross-sectional view along the first direction H of another display panel provided in this embodiment of the present disclosure, such as... Figure 15 and Figure 16 The display panel 200 shown is Figure 7 The display panels shown have essentially the same structure, with the only difference being that, in the first direction H, the orthogonal projection of the second light-shielding strip 232 onto the substrate 210 exceeds the orthogonal projection of the second light-emitting unit 221b onto the substrate 210. By lengthening the second light-shielding strip 232 corresponding to the second light-emitting unit 221b (such as a red light-emitting unit), which has the shortest size in the first direction H, the light-emitting window of the second light-emitting unit 221b can be narrowed, reducing the brightness of that color across the entire viewing angle. This causes the brightness of the second light-emitting unit 221b to decay faster over a wide viewing angle, aligning the brightness decay curve of the second light-emitting unit 221b with the decay curve of the first light-emitting unit 221a (such as a green light-emitting unit). This further balances the brightness ratio of red, green, and blue at different viewing angles, fundamentally improving the color shift problem without affecting the overall privacy protection effect in the second direction V.

[0054] For example, in the first direction H, the distance D0 between the second light-shielding strip 232 and the edge of the orthogonal projection of the second light-emitting unit 221b on the substrate 210 is greater than 3μm, so as to ensure that the second light-shielding strip 232 forms a sufficient narrowing effect on the light-emitting window of the second light-emitting unit 221b.

[0055] Figure 17 This is a top view of yet another display panel provided in this embodiment of the present disclosure. Figure 18 This is a partial cross-sectional view along the second direction V of another display panel provided in this disclosure embodiment, such as... Figure 17 and Figure 18 The display panel 200 shown is Figure 7The structure of the display panel 200 shown is basically the same, the only difference being that the dimension a2 of the second light-shielding strip 232 in the second direction V is larger than the dimension a1 of the first light-shielding strip 231 in the second direction V (see...). Figure 9 ).

[0056] As can be seen from the formula x / b=1-(a / tanφ)*(1 / b) for the proportion of black matrix obstruction of a single sub-light-emitting unit, the smaller the value of a, the larger the value of x / b. Correspondingly, the higher the proportion of black matrix obstruction of the second light-emitting unit 221b, the faster its brightness decay rate in the second direction V. This makes the brightness decay curve of the second light-emitting unit 221b more consistent with the decay rate of the first light-emitting unit 221a, balancing the brightness ratio of different color light-emitting units at various viewing angles, and further improving the viewing angle deviation problem of the display panel.

[0057] It should be noted that when the size of the first light-shielding strip 231 changes layer by layer in the second direction V, the size a2 of the second light-shielding strip 232 in the second direction V is always greater than the maximum size a1 of the first light-shielding strip 231 in the second direction V, thereby ensuring that the second light-emitting unit 221b obtains a larger black matrix blocking ratio, so that its brightness decays faster and is closer to the decay trend of the first light-emitting unit 221a.

[0058] For example, if the black matrix 230 includes a multi-layer structure, the dimension a2 of the second light-shielding strip 232 in the second direction V of each layer of the black matrix can be widened simultaneously, so that the dimension a2 of the second light-shielding strip 232 in the second direction of each layer is the same and is larger than the dimension a1 of the first light-shielding strip 231 in the second direction of the corresponding layer. At this time, it can ensure that the brightness decay rate of the second light-emitting unit 221b in the second direction V is consistent with that of the first light-emitting unit 221a, and can maintain the privacy protection effect at a wide viewing angle. At the same time, it can improve the color consistency and display uniformity of the display panel at different viewing angles, thus achieving dual optimization of privacy protection performance and display effect.

[0059] Figure 19 This is a top view of another display panel provided in this embodiment of the disclosure, such as... Figure 19 The display panel 200 shown is Figure 7 The display panel 200 shown has a basically the same structure, the only difference being that, in the first direction H, the orthogonal projection of the second light-shielding strip 232 on the substrate 210 exceeds the orthogonal projection of the second light-emitting unit 221b on the substrate 210, and the size a2 of the second light-shielding strip 232 in the second direction V is greater than the size a1 of the first light-shielding strip 231 in the second direction V. Figure 19The display panel 200 shown can extend the second light-shielding strip 232 in the first direction H and widen the second light-shielding strip 232 in the second direction V. This allows for coordinated control of the brightness decay characteristics of the second light-emitting unit 221b from two dimensions: the width of the light-emitting window and the occlusion ratio. This accelerates the brightness decay rate of the second light-emitting unit 221b at wide viewing angles, thereby optimizing the color shift problem.

[0060] Figure 20 This is the second of the brightness attenuation characteristic diagrams of a display panel provided in this embodiment of the disclosure, such as... Figure 20 As shown in the figure, the horizontal axis represents the viewing angle, indicating the angle between the observer and the normal direction of the display panel. The vertical axis represents the relative brightness percentage, that is, the percentage value relative to the brightness at a normal viewing angle (0°), used to characterize the degree of brightness attenuation. The lower the value, the more severe the attenuation and the worse the visibility. The curve before improvement in the figure is the brightness attenuation trajectory of the red light emitting unit of the display panel 100 in the second direction V in the related art. The curve after improvement is the brightness attenuation trajectory of the second light-shielding strip 232 in accordance with the present disclosure as follows. Figure 19 After the improvement shown, the brightness attenuation trajectory of the second light-emitting unit 221b (i.e., the red light-emitting unit) of the display panel 200 in the second direction V is [determined]. Figure 20 It can be seen that the brightness decay trends of the two curves before and after the improvement are basically the same in the large viewing angle (≥60°) region, both rapidly decaying to less than 5%, with almost no light emitted. This indicates that the technical solution of this disclosure does not weaken the privacy protection effect of the display panel in the second direction V, and can still achieve reliable privacy protection. However, in the small and medium viewing angle (0°~50°) region, the relative brightness of the improved curve is significantly lower than that of the unimproved curve, and the brightness decay rate is significantly faster. This indicates that the second light-shielding strip 232 of this disclosure is modified according to the following... Figure 19 The improved method effectively accelerates the brightness decay (L-Decay) of the second light-emitting unit 221b at small and medium viewing angles, aligning the brightness decay curve of the second light-emitting unit 221b (i.e., the red light-emitting unit) with the decay curve of the first light-emitting unit 221a (the green light-emitting unit). This balances the brightness ratio of red, green, and blue at different viewing angles, fundamentally improving the viewing angle distortion problem caused by the slow decay of red light and its asynchronous decay with green light. This achieves a dual optimization of privacy protection performance and color consistency across all viewing angles.

[0061] Figure 21 This is a second chromaticity diagram of a display panel provided in this embodiment. The horizontal axis represents the x-chromaticity coordinate in the CIE 1931 color space, indicating the proportion of red (R) component in the color perceived by the human eye; the vertical axis represents the y-chromaticity coordinate in the CIE 1931 color space, indicating the proportion of green (G) component in the color perceived by the human eye. Figure 21 It can be seen that this disclosure specifies the second light-shielding strip 232 in accordance with... Figure 19After the improvement shown, when φ is 50°, the offset of the 200 chromaticity coordinates of the display panel along the trajectory is significantly reduced, and there is no obvious offset in the direction of increasing x and decreasing y. The color deviation value at large viewing angle is greatly reduced. Moreover, the trajectory direction at this viewing angle is basically consistent with the 0° normal viewing state, and the trajectory fluctuation is smooth. For large-size display panels, the colors in different areas can be close to the reference colors at the normal viewing angle, the color deviation phenomenon is effectively improved, and the consistency of the display and the visual experience are significantly improved.

[0062] Figure 22 This is the second color contrast diagram of a display panel provided in this disclosure, wherein the improved φ50° curve is the result of this disclosure adjusting the second light-shielding strip 232 according to... Figure 19 The improved method shown illustrates the chromaticity change trajectory of display panel 200 at a viewing angle of φ=50°. The original φ50° curve represents the chromaticity change trajectory of display panel 100 at a viewing angle of φ=50° provided by related technologies. Comparing the two curves, it can be seen that the original φ50° curve is significantly shifted towards increasing x and decreasing y, with a large color deviation value and a significant deviation from the baseline state. In contrast, the improved φ50° curve is closer to the trajectory of the 0° viewing state, with a significantly reduced chromaticity coordinate offset, a significantly lower color deviation value, and a significantly improved color consistency. Therefore, this disclosure, through the design of the dimensions of the second light-shielding strip 232, effectively improves the problems of severe color deviation and excessively rapid brightness decay in related technologies. While ensuring the privacy function (without changing the black matrix blocking logic), it makes the color performance of the display panel more stable, and significantly improves the consistency of the displayed image and the visual experience.

[0063] In some embodiments, see Figure 7 The black matrix 230 includes at least one third light-shielding strip 233 extending along the first direction H. The orthographic projection of the third light-shielding strip 233 on the substrate 210 overlaps with the orthographic projection of the third light-emitting unit 221c on the substrate 210. Figure 23 This is a third partial cross-sectional view of a display panel along the first direction H provided in this embodiment of the disclosure, such as... Figure 23 As shown, in the first direction H, the orthogonal projection of the third light-shielding strip 233 on the substrate 210 does not exceed the orthogonal projection of the third light-emitting unit 221c on the substrate 210. Figure 24 This is a third partial cross-sectional view of a display panel along the second direction V provided in this embodiment of the disclosure, such as... Figure 24 As shown, in some embodiments, the third light-shielding strips 233 in at least one layer of black matrix 230 have the same size in the second direction V, which is a3. This design allows the light emitted by the third light-emitting unit 221c in the second direction V to be stably blocked by the third light-shielding strips 233, ensuring its privacy protection effect in the second direction V (privacy protection direction).

[0064] For example, see Figure 24 In the second direction V, there is a gap a03 between the orthographic projection of the main light-shielding strip 230a in at least one layer of black matrix 230 onto the substrate 210 and the orthographic projection of the third light-emitting unit 221c onto the substrate 210. The design of this gap a03 can effectively prevent the main light-shielding strip 230a from excessively blocking the third light-emitting unit 221c, ensuring the light output of the third light-emitting unit 221c at small / medium viewing angles.

[0065] In some embodiments, the black matrix 230 includes at least two third light-shielding strips 233 disposed along the second direction V. The at least two third light-shielding strips 233 can partition and block the first light-emitting unit 221a along the second direction V, which can avoid fluctuations in the privacy protection effect caused by uneven blocking by a single light-shielding strip.

[0066] It should be noted that, for the first light-emitting unit 221a, the second light-emitting unit 221b, and the third light-emitting unit 221c of different colors, the cross-sectional arrangement of the light-shielding strips of the multi-layer black matrix 230 in the second direction V can also be flexibly selected. For example, it can adopt... Figure 9 The gradually decreasing arrangement of the light-shielding strips along the third direction Z, with each strip decreasing in size in the second direction V, as shown, can also be adopted as follows: Figure 14 The uniform width arrangement of each layer of light-shielding strips in the second direction V, as shown, can be freely combined and selected according to actual privacy needs and the need for role-shifting adjustment, to achieve matching and adaptation of different structural schemes.

[0067] In some embodiments, such as Figure 8 As shown, the display panel 200 also includes a pixel defining layer 240, which is disposed on the side of the substrate 210 where the light-emitting group 220 is disposed. The pixel defining layer 240 has multiple pixel openings, and the light-emitting units 221 are correspondingly disposed within the pixel openings. When the light-emitting unit 221 includes multiple light-emitting parts, the multiple light-emitting parts can be disposed within the same pixel opening or in different pixel openings. In the actual manufacturing process, the process can be flexibly adjusted according to design requirements and display effects to effectively maintain the aperture ratio of the pixel defining layer 240 while ensuring the display viewing angle in the first direction H. The specific arrangement of the light-emitting units 221 can be designed to adapt to the pixel arrangement of conventional application scenarios such as mobile phones, televisions, and automotive displays, and this disclosure does not further limit it.

[0068] For example, the light-emitting unit 221 includes a first electrode, a second electrode, and an organic functional layer disposed between the first electrode and the second electrode. The organic functional layer includes a light-emitting layer, which may include small molecule organic materials or polymer molecule organic materials, and may be a fluorescent light-emitting material or a phosphorescent light-emitting material. The organic functional layer may also include a hole injection layer, a hole transport layer, an electron injection layer, an electron transport layer, etc. One of the first electrode and the second electrode is a cathode, and the other is an anode.

[0069] In some embodiments, the display panel 200 further includes an encapsulation layer 250 disposed between the light-emitting unit 221 and the black matrix 230. The encapsulation layer 250 is used to seal and protect the light-emitting unit 221, isolate it from external moisture, oxygen and other impurities, prevent the light-emitting unit 221 from aging and being damaged due to external environmental corrosion, ensure the long-term stable display of the display panel 200, and at the same time not affect the light emission efficiency of the light-emitting unit 221 and the light-shielding and privacy protection effect of the black matrix 230.

[0070] In some embodiments, the display panel 200 further includes a protective layer 260 (hereinafter referred to as the OC layer) disposed on the side of the encapsulation layer 250 away from the substrate 210, and the black matrix 230 is embedded in the OC layer 260. The OC layer 260 can provide further protection for the encapsulation layer 250 and the light-emitting unit 221 below it, while providing a stable support substrate for the black matrix 230, ensuring the pattern accuracy and light-shielding performance of the black matrix 230, avoiding problems such as detachment or displacement of the black matrix 230, and taking into account both the protective performance and privacy display effect of the display panel.

[0071] Based on the same inventive concept, this disclosure also provides a display device, including a display panel as described in the above embodiments.

[0072] The technical solutions provided in the above-described embodiments have at least the following technical effects or advantages: In the display panel and display device provided in this disclosure, when the privacy protection direction is the second direction, the larger the size of the light-emitting unit in the first direction, the larger the proportion of the area of ​​the light-emitting unit blocked by the first light-shielding strip and the smaller the proportion of the light-emitting area. At small / medium viewing angles between the first and second directions, the brightness decay rate of the light-emitting unit is greater. Since the first light-emitting unit has the largest size in the first direction, its brightness decay rate is even greater at small / medium viewing angles, making it prone to color shift. Therefore, this disclosure, by setting the first light-emitting unit to include at least two sub-light-emitting units spaced apart along the first direction, effectively divides the first light-emitting unit into at least two parts in the first direction. Each individual sub-light-emitting unit has a smaller size in the first direction, a smaller proportion of the area blocked by the first light-shielding strip, and a larger proportion of the light-emitting area. This increases the overall proportion of the light-emitting area of ​​the first light-emitting unit, reduces its brightness decay rate at small / medium viewing angles, and improves the color shift problem caused by the excessively rapid brightness decay of the first light-emitting unit at small / medium viewing angles. Furthermore, when viewing the screen in the second direction (i.e., the privacy protection direction), the first light-emitting unit is most affected by the first light-shielding strip, and its large-viewing-angle light emission can be effectively blocked to ensure its privacy protection function. In other words, this disclosure achieves privacy protection in the second direction of the display panel while ensuring the display effect and color consistency of the display panel.

[0073] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0074] In the description of this disclosure, it should be understood that the terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” and “counterclockwise” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0075] Furthermore, the use of terms such as "first" and "second" in this disclosure is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this disclosure, "multiple" means two or more, unless otherwise explicitly specified.

[0076] Although embodiments of the present disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A display panel, characterized in that, include: Substrate; Multiple light-emitting groups are disposed on one side of the substrate; each light-emitting group includes multiple light-emitting units of various light-emitting colors that are spaced apart from each other, and the multiple light-emitting units are arranged at intervals along a first direction or a second direction, wherein the first direction and the second direction are two intersecting directions parallel to the substrate; wherein, the first light-emitting unit includes at least two sub-light-emitting units arranged at intervals along the first direction, and the first light-emitting unit is the light-emitting unit with the largest size in the first direction in the light-emitting group. At least one black matrix is ​​disposed on the side of the plurality of light-emitting units away from the substrate; the black matrix includes at least one first light-shielding strip extending along the first direction, and the orthographic projection of the first light-shielding strip on the substrate overlaps with the orthographic projection of the first light-emitting unit on the substrate.

2. The display panel according to claim 1, characterized in that, In the first direction, the orthogonal projection of the first light-shielding strip on the substrate does not exceed the orthogonal projection of the first light-emitting unit on the substrate.

3. The display panel according to claim 1, characterized in that, The first light-emitting unit includes a first sub-light-emitting unit and a second sub-light-emitting unit arranged at intervals along a first direction; the first light-shielding strip includes a first sub-light-shielding strip and a second sub-light-shielding strip arranged at intervals along the first direction; The orthographic projection of the first sub-light-shielding strip on the substrate overlaps with the orthographic projection of the first sub-light-emitting unit on the substrate; the orthographic projection of the second sub-light-shielding strip on the substrate overlaps with the orthographic projection of the second sub-light-emitting unit on the substrate. In the first direction, the orthogonal projection of the first sub-light-shielding strip on the substrate does not exceed the orthogonal projection of the first sub-light-emitting unit on the substrate, and the orthogonal projection of the second sub-light-shielding strip on the substrate does not exceed the orthogonal projection of the second sub-light-emitting unit on the substrate.

4. The display panel according to claim 1, characterized in that, The display panel includes at least two layers of the black matrix, and the size of the first light-shielding strip in the at least two layers of the black matrix decreases layer by layer in the second direction along the direction away from the substrate.

5. The display panel according to claim 1, characterized in that, The black matrix includes at least one second light-shielding strip extending along the first direction. The orthographic projection of the second light-shielding strip on the substrate overlaps with the orthographic projection of the second light-emitting unit on the substrate. In the first direction, the orthographic projection of the second light-shielding strip on the substrate exceeds the orthographic projection of the second light-emitting unit on the substrate. The second light-emitting unit is the smallest light-emitting unit in the first direction among the light-emitting units.

6. The display panel according to claim 1, characterized in that, The black matrix includes at least one second light-shielding strip extending along the first direction, wherein the orthographic projection of the second light-shielding strip on the substrate overlaps with the orthographic projection of the second light-emitting unit on the substrate, and the size of the second light-shielding strip in the second direction is larger than the size of the first light-shielding strip in the second direction; The second light-emitting unit is the smallest light-emitting unit in the first direction among the light-emitting units.

7. The display panel according to claim 1, characterized in that, The plurality of light-emitting units in the plurality of light-emitting groups are arranged in a plurality of light-emitting rows along the second direction, and each light-emitting row includes a plurality of light-emitting units arranged along the first direction; The black matrix includes a plurality of main light-shielding strips extending along the first direction, and the orthographic projection of the main light-shielding strips on the substrate overlaps with the orthographic projection of the gap between two adjacent light-emitting rows on the substrate.

8. The display panel according to claim 7, characterized in that, In two adjacent rows of light emission, the multiple light emission units in one row are all the first light emission units, and the multiple light emission units in the other row include alternating second and third light emission units. The first light emission unit is used to emit a first color light, the second light emission unit is used to emit a second color light, and the third light emission unit is used to emit a third color light.

9. The display panel according to claim 8, characterized in that, The black matrix includes at least one third light-shielding strip extending along the first direction, wherein the orthographic projection of the third light-shielding strip on the substrate overlaps with the orthographic projection of the third light-emitting unit on the substrate; and in the first direction, the orthographic projection of the third light-shielding strip on the substrate does not exceed the orthographic projection of the third light-emitting unit on the substrate.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 9.

Images