Display panel and display device

Abstract

The display panel and display device provided by the present disclosure belong to the technical field of display. The display panel comprises a substrate, a pixel layer and a light extraction layer which are sequentially stacked; the pixel layer comprises a plurality of sub-pixels; the light extraction layer comprises a light-lean layer and a light-dense layer covering the light-lean layer, the refractive index of the light-lean layer being lower than that of the light-dense layer; the light-lean layer has a plurality of mirror assemblies corresponding to the plurality of sub-pixels one by one, the mirror assemblies having light-out holes overlapping the corresponding sub-pixels; the mirror assemblies comprise outer mirrors surrounding the corresponding sub-pixels; at least part of the mirror assemblies further comprise inner mirrors overlapping the corresponding sub-pixels, the outer mirrors and the inner mirrors forming at least part of the light-out holes. The display panel can improve the light-out efficiency of the display panel.

Description

Technical Field

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

[0002] OLED (Organic Light Emitting Diode) display panels are widely used due to their advantages such as self-illumination, high brightness, wide viewing angle, and fast response. The power consumption and lifespan of OLED display panels are closely related to their light emission efficiency, but the light emission efficiency of current OLED display panels is relatively low.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a display panel and display device that improve the light emission efficiency of the display panel.

[0005] According to one aspect of this disclosure, a display panel is provided, comprising a substrate, a pixel layer, and a light extraction layer stacked sequentially; wherein, the pixel layer includes a plurality of sub-pixels; the light extraction layer includes a light-sparse layer and a light-dense layer covering the light-sparse layer, wherein the refractive index of the light-sparse layer is lower than that of the light-dense layer;

[0006] The light-reducing layer has a plurality of convex mirror assemblies that are arranged one-to-one with the plurality of sub-pixels. The convex mirror assembly has a light-emitting aperture that overlaps with the corresponding sub-pixel. The convex mirror assembly includes an external convex mirror surrounding the corresponding sub-pixel.

[0007] The convex lens assembly at least partially includes an inner convex lens overlapping the corresponding sub-pixel, and at least a portion of the light-emitting aperture is formed between the outer convex lens and the inner convex lens.

[0008] According to one embodiment of this disclosure, the sub-pixel includes a first sub-pixel and a second sub-pixel, wherein the light-emitting area of ​​the first sub-pixel is larger than the light-emitting area of ​​the second sub-pixel; the convex lens assembly includes a first convex lens assembly corresponding to the first sub-pixel and a second convex lens assembly corresponding to the second sub-pixel;

[0009] The first convex lens assembly has the internal convex lens.

[0010] According to one embodiment of this disclosure, the second convex lens assembly does not have the internal convex lens.

[0011] According to one embodiment of this disclosure, the second convex lens assembly also has the internal convex lens;

[0012] The inner convex mirror of the first convex mirror assembly divides its light-emitting aperture into multiple first sub-light-emitting apertures; the inner convex mirror of the second convex mirror assembly divides its light-emitting aperture into multiple second sub-light-emitting apertures;

[0013] The number of the first sub-light-emitting apertures is greater than the number of the second sub-light-emitting apertures.

[0014] According to one embodiment of this disclosure, the second convex lens assembly also has the internal convex lens;

[0015] The edge length of the inner convex lens of the first convex lens assembly is a first length, and the edge length of the inner convex lens of the second convex lens assembly is a second length; the first length is greater than the second length.

[0016] According to one embodiment of this disclosure, the endoscopic mirror is in the form of a closed ring.

[0017] According to one embodiment of this disclosure, the pattern of the inner convex mirror forms a concentric ring structure with the inner edge of the outer convex mirror.

[0018] According to one embodiment of this disclosure, the internal convex mirror divides the light-emitting aperture into 2 to 8 sub-light-emitting apertures.

[0019] According to one embodiment of this disclosure, the endoscopic mirror is axially symmetric, centrally symmetric, or rotationally symmetric.

[0020] According to one embodiment of this disclosure, the pattern of the convex mirror is X-shaped, Y-shaped, linear, or a combination of any two of the above shapes.

[0021] According to one embodiment of the present disclosure, the internal convex mirror includes at least one internal convex strip, at least one end of which is connected to the external convex mirror.

[0022] According to one embodiment of this disclosure, the internal convex mirror includes one or more internal convex strips;

[0023] The slope angle of the side of the inner convex strip is in the range of 45° to 70°.

[0024] According to one embodiment of this disclosure, the internal convex mirror includes one or more internal convex strips;

[0025] The height of the inner convex strip is in the range of 1 to 3 micrometers.

[0026] According to one embodiment of this disclosure, the internal convex mirror includes one or more internal convex strips;

[0027] The width of the inner convex strip is in the range of 3 to 5 micrometers.

[0028] According to one embodiment of the present disclosure, the display panel further includes a thin film encapsulation layer located on the side of the pixel layer away from the substrate.

[0029] The light extraction layer is sandwiched between the pixel layer and the thin film encapsulation layer.

[0030] According to one embodiment of this disclosure, the material of the optically rarefied layer is resin; and the material of the optically dense layer is silicon nitride.

[0031] According to one embodiment of the present disclosure, the display panel further includes a thin film encapsulation layer located on the surface of the pixel layer away from the substrate.

[0032] The light extraction layer is located on the surface of the thin film encapsulation layer away from the substrate.

[0033] According to one embodiment of the present disclosure, the display panel further includes a touch function layer located on the side of the pixel layer away from the substrate.

[0034] The light extraction layer is located on the surface of the touch function layer away from the substrate.

[0035] According to another aspect of this disclosure, a display device is provided, including the display panel described above. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0037] Figure 1 This is a schematic diagram of the structure of the display panel in one embodiment of the present disclosure.

[0038] Figure 2 This is a schematic diagram of the structure of a first sub-pixel and its corresponding first convex lens assembly, and a second sub-pixel and its corresponding second convex lens assembly in one embodiment of this disclosure.

[0039] Figure 3 This is a schematic diagram of the structure of a convex lens assembly with an internal convex lens and its corresponding sub-pixel in one embodiment of the present disclosure.

[0040] Figure 4 This is a schematic diagram of the structure of a convex lens assembly with an internal convex lens and its corresponding sub-pixel in one embodiment of the present disclosure.

[0041] Figure 5This is a schematic diagram of the structure of a convex lens assembly with an internal convex lens and its corresponding sub-pixel in one embodiment of the present disclosure.

[0042] Figure 6 This is a schematic diagram of the structure of a convex lens assembly with an internal convex lens and its corresponding sub-pixel in one embodiment of the present disclosure.

[0043] Figure 7 This is a schematic diagram of the structure of a convex lens assembly with an internal convex lens and its corresponding sub-pixel in one embodiment of the present disclosure.

[0044] Figure 8 This is a schematic diagram of the structure of a convex lens assembly with an internal convex lens and its corresponding sub-pixel in one embodiment of the present disclosure.

[0045] Figure 9 and Figure 10 This is a comparison of the converging effects of two different convex lens components on large-angle light rays; among them, Figure 9 The convex lens assembly in the middle has an internal convex lens. Figure 10 The convex lens assembly in the middle does not have an internal convex lens.

[0046] Figure 11 This is a schematic diagram of the structure of the display panel in one embodiment of the present disclosure.

[0047] Figure 12 This is a schematic diagram of the structure of the display panel in one embodiment of the present disclosure.

[0048] Figure 13 This is a schematic diagram of the structure of the display panel in one embodiment of the present disclosure.

[0049] Figure 14 This is a schematic diagram of the structure of the display panel in one embodiment of the present disclosure.

[0050] Figure 15 This is a schematic diagram of the structure of the display panel in one embodiment of the present disclosure.

[0051] Figure 16 This is a schematic diagram of the structure of an adjacent first convex lens assembly and a second convex lens assembly in one embodiment of the present disclosure. Detailed Implementation

[0052] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0053] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0054] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0055] See Figure 1 This disclosure provides a display panel comprising a substrate F100, a pixel layer F300, and a light extraction layer F600 stacked sequentially. The pixel layer F300 includes a plurality of sub-pixels Psub; the light extraction layer F600 includes a light-sparse layer F601 and a light-dense layer F602 covering the light-sparse layer F601, wherein the refractive index of the light-sparse layer F601 is lower than that of the light-dense layer F602. The light-sparse layer F601 has a plurality of convex mirror assemblies LENS corresponding to each sub-pixel Psub, each convex mirror assembly LENS having a light-emitting aperture overlapping with its corresponding sub-pixel Psub; each convex mirror assembly LENS includes an outer convex mirror Lout surrounding its corresponding sub-pixel Psub. At least a portion of the convex mirror assembly LENS also includes an inner convex mirror Lin overlapping its corresponding sub-pixel Psub, with at least a portion of the light-emitting aperture formed between the outer and inner convex mirrors.

[0056] In the display panel provided in this disclosure, the refractive index of the optical density layer F602 is higher than that of the external convex lens Lut and the internal convex lens Lin. See also Figure 9When light from sub-pixels Psub shines at a large angle from the optical density layer F602 onto the side of the convex lens assembly LENS, the light exceeding the critical angle of total internal reflection will be totally reflected and focused by the side of the convex lens assembly LENS, thereby improving the light extraction efficiency of each sub-pixel Psub in the display panel and achieving the effect of light focusing and brightness enhancement. In this display panel, at least some of the convex lens LENS also include inner convex lenses Lin. The side area of ​​these convex lens LENS is increased and the spacing is reduced, which can increase the proportion of light shining at a large angle onto the side of these convex lens LENS, thereby improving the light extraction efficiency of these convex lens LENS, increasing the light output brightness of the corresponding sub-pixels Psub, and ultimately improving the light output efficiency of the display panel.

[0057] The structure, principle, and effect of the display panel of this disclosure will be further explained and illustrated below with reference to the accompanying drawings.

[0058] In this disclosure, the pixel layer F300 of the display panel may have multiple sub-pixels Psub, which can emit light of different colors to enable the display panel to achieve color display. See also... Figure 2 The sub-pixel Psub on the display panel can include at least a first sub-pixel Psub1 and a second sub-pixel Psub2, wherein the light-emitting area of ​​the first sub-pixel Psub1 is larger than the light-emitting area of ​​the second sub-pixel Psub2. In one embodiment of this disclosure, the first sub-pixel Psub1 can be a blue sub-pixel Psub; the second sub-pixel Psub2 can be a red sub-pixel Psub and a green sub-pixel Psub. For example, the display panel can be a B (blue sub-pixel Psub)G (green sub-pixel Psub)R (red sub-pixel Psub)G (green sub-pixel Psub) architecture display panel, wherein the blue sub-pixel Psub has the largest light-emitting area and serves as the first sub-pixel Psub1, and the green and red sub-pixels Psub have smaller light-emitting areas than the blue sub-pixel Psub and serve as the second sub-pixel Psub2. It is understood that in this disclosure, the sub-pixel Psub of the display panel can also be other colors, such as white sub-pixels Psub, cyan sub-pixels Psub, yellow sub-pixels Psub, magenta sub-pixels Psub, etc., and this disclosure does not limit this.

[0059] To improve the light-emitting brightness of each sub-pixel Psub, the display panel of this disclosure has a light extraction layer F600 on the pixel layer F300. See also Figure 9 and Figure 10 The light extraction layer F600 has convex lens components LENS corresponding one-to-one with each sub-pixel Psub and an optically denser layer F602 covering each convex lens component LENS. In some embodiments, the refractive index of the optically sparser layer F601 can be in the range of 1.4 to 1.5.

[0060] In this process, the light-density layer F602 and the side of the convex lens assembly LENS form a light interface. When the light emitted by the sub-pixel Psub shines from the light-density layer F602 onto the light interface, if the incident angle of the light is greater than the critical angle of total internal reflection, the light will be reflected by the light interface to the outside of the display panel, thereby allowing the light to be emitted and increasing the brightness of the sub-pixel Psub. In this way, the convex lens assembly LENS has a light-focusing and brightness-enhancing effect.

[0061] In this disclosure, all convex lens assemblies (LENS) include an external convex lens (Lout) surrounding the corresponding sub-pixel. When the light-emitting aperture formed by the external convex lens (Lout) is relatively large, the distance between the two opposite sides of the external convex lens (Lout) is large. This reduces the relative ratio of the side area of ​​the external convex lens (Lout) to the area of ​​the light-emitting aperture, and also reduces the proportion of light that can be totally internalized. In other words, when the size of the light-emitting aperture of the external convex lens (Lout) is large, the external convex lens (Lout) provides a smaller improvement in the light-emitting brightness of the sub-pixel Psub. In this disclosure, at least some convex lens assemblies (LENS) also include internal convex lenses (Lin) overlapping with the corresponding sub-pixel Psub. These internal convex lenses (Lin) not only provide more light interfaces but also allow a larger proportion of light to be reflected, thereby improving the light-emitting brightness of these sub-pixels Psub. See also... Figure 9 and Figure 10 It is known that without the inner convex mirror (Lin), some large-angle light rays may be emitted from the light extraction layer F600 at a large angle. However, when the inner convex mirror (Lin) is present, these large-angle light rays can be totally reflected by the side of the inner convex mirror (Lin) and focused onto the front of the display panel. In this way, the setting of the inner convex mirror (Lin) can increase the proportion of light rays that are totally reflected and focused by the convex mirror assembly (LENS), thereby improving the light-gathering and brightness enhancement effect of the convex mirror assembly (LENS).

[0062] In the display panel of this disclosure, the convex lens assembly LENS includes a first convex lens assembly LENS1 corresponding to a first sub-pixel Psub1 and a second convex lens assembly LENS2 corresponding to a second sub-pixel Psub2. Both the first convex lens assembly LENS1 and the second convex lens assembly LENS2 include an external convex lens Lout surrounding the sub-pixel Psub. In some embodiments, see [reference needed]. Figure 2The first convex lens assembly LENS1 is provided with an inner convex lens Lin. Because the first sub-pixel Psub1 has a large light-emitting area, the space enclosed by the outer convex lens Lout surrounding the first sub-pixel Psub1 is relatively large. This results in a weak increase in the light emission brightness of the first sub-pixel Psub1 by the outer convex lens Lout, easily causing color shift in the display panel. In this embodiment, an inner convex lens Lin can be provided inside the outer convex lens Lout, thereby increasing the light emission brightness of the first sub-pixel Psub1 and suppressing or eliminating color shift caused by insufficient increase in the light emission brightness of the first sub-pixel Psub1 by the convex lens assembly LENS. Further, see... Figure 2 The first convex lens assembly LENS1 is provided with an inner convex lens Lin, while the second convex lens assembly LENS2 is not provided with an inner convex lens Lin, so as to reduce or eliminate the difference in brightening effect between the first convex lens assembly LENS1 and the second convex lens assembly LENS2, thereby helping to eliminate the color shift of the display panel.

[0063] For example, in an RGBG-arranged display panel, the light-emitting areas of the green sub-pixel (G), red sub-pixel (R), and blue sub-pixel (B) increase sequentially. When the convex lens assembly LENS is only provided with an external convex lens (Lout), the brightness of the green sub-pixel (G) can be increased by 11.84%, the brightness of the red sub-pixel (R) by 8.71%, while the brightness of the blue sub-pixel (B) is only increased by 1.14%. However, in one embodiment of this disclosure, an internal convex lens (Lin) can be provided in the convex lens assembly LENS corresponding to the blue sub-pixel, thereby significantly improving the light-emitting brightness of the blue sub-pixel (B), reducing the difference in light-emitting brightness improvement among the green sub-pixel (G), red sub-pixel (R), and blue sub-pixel (B), thereby reducing or eliminating color shift and helping to extend the lifespan of the blue sub-pixel.

[0064] In other embodiments of this disclosure, an inner convex mirror Lin may also be disposed inside the second convex mirror assembly LENS2. Furthermore, to balance the light emission intensity of the first sub-pixel Psub1 and the second sub-pixel Psub2, the structure of the inner convex mirror Lin of the first convex mirror assembly LENS1 and the inner convex mirror Lin of the second convex mirror assembly LENS2 can be adjusted to give the inner convex mirror Lin of the first convex mirror assembly LENS1 a stronger brightening capability. For example, see [link to example]. Figure 16 The light-emitting aperture HA of the first convex lens assembly LENS1 is divided into multiple first sub-light-emitting apertures HA0 by the inner convex lens Lin, and the light-emitting aperture HB of the second convex lens assembly LENS2 is divided into multiple second sub-light-emitting apertures HB0 by the inner convex lens Lin; wherein the number of first sub-light-emitting apertures HA0 is greater than the number of second sub-light-emitting apertures HB0. As another example, see... Figure 16The internal convex lens Lin includes convex strips; wherein the total length of the convex strips of the internal convex lens Lin of the first convex lens assembly LENS1 is greater than the total length of the convex strips of the internal convex lens Lin of the second convex lens assembly LENS2. See also, as an example... Figure 16 The inner convex mirror of the first convex mirror assembly LENS1 has a first edge length, and the inner convex mirror of the second convex mirror assembly LENS2 has a second edge length; the first length is greater than the second length. The edge length of the inner convex mirror can refer to the length of its side profile, such as the length of the lower edge of the side profile (closer to the substrate). Alternatively, other feasible strategies can be used to adjust the distribution of the inner convex mirrors Lin in the first and second convex mirror LENS1 assemblies to ensure that the brightening effect of the inner convex mirror Lin in the first convex mirror assembly LENS1 is stronger than that in the second convex mirror Lin in the second convex mirror assembly LENS2.

[0065] In some implementations, see Figure 13 Adjacent convex lenses (Lout) can be connected to form one or more integral units. The side (inner side) of the convex lens Lout facing the light-emitting aperture can be sloped; the smaller the slope, the more significant the brightening effect. In some embodiments, the slope angle of the side of the convex lens Lout facing the light-emitting aperture can be in the range of 45° to 70°, for example, 55°.

[0066] In other implementations, such as Figure 12 The convex lenses (Lout) can be spaced apart from each other. For example, see [link to example]. Figure 3 The convex lens Lout can be a closed ring structure surrounding the corresponding sub-pixel Psub. The pattern of the convex lens Lout (its orthographic projection on the substrate F100) can be circular, elliptical, polygonal, etc., surrounding the sub-pixel Psub. In one embodiment of this disclosure, the pattern of the convex lens Lout has the same shape as the edge of the corresponding sub-pixel Psub and is larger in size than the corresponding sub-pixel Psub. That is, the pattern of the convex lens Lout and the edge of the corresponding sub-pixel Psub form a concentric ring structure. For example, see... Figure 3 If the pattern of the first sub-pixel Psub1 can be hexagonal, then the pattern of the convex lens Lout can also be a closed ring in the form of a hexagon.

[0067] In one embodiment of this disclosure, see Figure 3 The Lout can include multiple convex strips connected end to end in sequence, and the convex strips are spliced ​​together to form the Lout surrounding the sub-pixel Psub.

[0068] Optionally, see Figure 12The sides of the protruding strip can be sloped, making it a raised platform shape that is wider at the bottom (near the substrate F100) and narrower at the top (away from the substrate F100). Furthermore, the slope angle of the side can be in the range of 45° to 70°, for example, 55°. It is understood that the slope angles of any two sides of the protruding lens Lout can be the same or different. In a specific example, the slope angles of all sides of the protruding lens Lout are the same to facilitate the fabrication of the protruding lens Lout.

[0069] Optionally, the height of the protruding strip can be no less than 1 micrometer, for example, in the range of 1 to 3 micrometers. In a specific example, the height of the protruding strip can be 2 micrometers.

[0070] Optionally, the width of the bottom surface (the surface near the substrate) of the convex strip can be no less than 3 micrometers, for example, in the range of 3 to 5 micrometers, to facilitate the fabrication of the convex mirror Lout.

[0071] In some embodiments, for a convex lens assembly (LENS) with an inner convex mirror (Lin), the inner convex mirror (Lin) can divide the light-emitting port of the LENS assembly into multiple sub-light-emitting ports, for example, into 2 to 8 sub-light-emitting ports. Further, the opening size of any one sub-light-emitting port can be between 5 and 21 micrometers, particularly between 5 and 14 micrometers. In one embodiment of this disclosure, the opening size of the sub-light-emitting port can be between 6 and 10.8 micrometers. In some tests, it was found that when the opening sizes of the sub-light-emitting ports are 10.8 micrometers, 10 micrometers, 9 micrometers, 8 micrometers, 7 micrometers, and 6 micrometers, the increase in light output brightness can be 5.4%, 5.8%, 6.3%, 6.9%, 7.5%, and 8.8%, respectively. In this disclosure, the opening size of the sub-light-emitting port is a dimension in a specific direction, such as the dimension in the row or column direction of the display panel; correspondingly, the increase in light output brightness due to this opening size is also an increase in the same direction.

[0072] In some embodiments of this disclosure, see Figures 3-8 The internal convex mirror Lin may include one or more internal convex strips P, and any one of the internal convex strips P may be in the shape of a protrusion that is wider at the bottom (in the direction closer to the substrate F100) and narrower at the top (in the direction away from the substrate F100). In this way, the side of the internal convex strip P can serve as an optical interface, and the incident light can be totally reflected when the critical angle of total internal reflection is reached.

[0073] Optionally, the slope angle of the side surface of the inner convex strip P can be in the range of 45° to 70°, for example, 55°. It is understood that the slope angles of any two sides of each inner convex strip P can be the same or different. In a specific example, the slope angles of the side surfaces of each inner convex strip P are the same to facilitate the fabrication of the inner convex lens Lin. Furthermore, the slope angles of the side surfaces of the inner convex lens Lin and the outer convex lens Lout are the same to facilitate the fabrication of both.

[0074] It is understood that in some other embodiments, the slope angle of the side of the inner convex strip P can be further reduced, for example, so that the slope angle of the side of the inner convex strip P is less than 45°, in order to further enhance the brightening effect of the inner convex strip P.

[0075] Optionally, the height of the inner convex strip P can be no less than 1 micrometer, for example, in the range of 1 to 3 micrometers. In a specific example, the height of the inner convex strip P can be 2 micrometers.

[0076] Optionally, the inner convex strip P can have a smaller width to provide more and denser sides while minimizing obstruction of the sub-pixel Psub. For example, the bottom width of the inner convex strip P (the width of the surface near the substrate F100) can be between 1 and 5 micrometers, for example, between 3 and 5 micrometers, to be fabricated effectively within the limits of the process.

[0077] Optionally, the inner convex strips P can be arranged in different patterns as needed to maximize the brightening effect of the inner convex mirror Lin. In some cases, the direction of the inner convex strips P can be adjusted to regulate the brightening capability of the inner convex mirror Lin in different directions, thereby reducing or eliminating color shift of the display panel in a specific direction.

[0078] In some embodiments, the pattern of the internal convex mirror Lin can be a centrally symmetrical, rotationally symmetrical, or axially symmetrical pattern, such as a centrally symmetrical or rotationally symmetrical X-shape, Y-shape, ring, straight line, polygon, etc., or a combination of the above patterns.

[0079] In some implementations, see Figure 3 The inner convex strip P can be wound into a closed ring, such as a triangle, square, pentagon, hexagon, ellipse, or circle. Thus, the pattern of the inner convex mirror Lin is a closed ring. Furthermore, the inner edges of the inner convex mirror Lin and the outer convex mirror Lout form a concentric ring structure, or the edges of the inner convex mirror Lin and the corresponding sub-pixel Psub form a concentric ring structure.

[0080] Of course, the inner convex strip P can also form multiple nested rings to further increase the density of the inner convex strip P. In this way, the pattern of the inner convex mirror Lin consists of multiple nested rings. Furthermore, each ring structure of the inner convex mirror Lin is concentric with the inner edge of the outer convex mirror Lout, or each ring structure of the inner convex mirror Lin is concentric with the edge of the corresponding sub-pixel Psub.

[0081] In some implementations, see Figures 4-8 At least part of the inner convex strip P is connected to the outer convex mirror Lout.

[0082] In one embodiment of this disclosure, see Figure 4 and Figure 8 The inner convex mirror Lin has an X-shaped pattern, which may include intersecting first and second inner convex strips, both extending in a straight line and having their ends connected to the outer convex mirror Lout. In this way, the inner convex mirror Lin can divide the light-emitting aperture into four sub-apertures. In one option, the four sub-apertures have the same area. In another option, the intersection of the first and second inner convex strips P can be located at the geometric center of the pattern formed by the inner edges of the outer convex mirror Lout.

[0083] Optionally, see Figure 4 The first inner convex strip P can be perpendicular to the second inner convex strip P. For example, the outer convex lens Lout can be an axially symmetric hexagon, with any two opposite sides of the hexagon being parallel, and the hexagon including two long sides of equal length and four short sides of equal length. The first inner convex strip P can be perpendicular to the long sides of the hexagon, with its two ends located at the midpoints of the two long sides respectively. One end of the second inner convex strip P is connected to the connection point of two adjacent short sides, and the other end is connected to the connection point of another two adjacent short sides. In a specific application, when the convex lens assembly LENS is positioned above the blue sub-pixel, the brightness of the blue sub-pixel in the horizontal direction can be increased by more than 4.4%.

[0084] Optionally, see Figure 8 The first inner convex strip P can be rotationally symmetrical with the second inner convex strip P. For example, the outer convex mirror Lout can be an axially symmetrical hexagon, with any two opposite sides of the hexagon being parallel, and the hexagon including two long sides of equal length and four short sides of equal length. The connection point between the long and short sides is an anchor point, so the hexagon has four anchor points. The two ends of the first inner convex strip P are connected to two non-adjacent anchor points, and the two ends of the second inner convex strip P are connected to two other non-adjacent anchor points.

[0085] In another embodiment of this disclosure, see [link to relevant documentation]. Figure 7The inner convex lens Lin has a Y-shaped pattern, comprising a first inner convex strip P, a second inner convex strip P, and a third inner convex strip P, all extending in straight lines. The inner edge (facing the light exit aperture) of the outer convex lens Lout of the convex lens assembly LENS is hexagonal, with three non-adjacent vertices of the hexagon serving as anchor points. The outer ends of the first, second, and third inner convex strips P are connected to the three anchor points, and their inner ends are interconnected. In one alternative embodiment, the inner ends of the first, second, and third inner convex strips P are located at the geometric center of the hexagon. In another alternative embodiment, the first, second, and third inner convex strips P have the same length. In yet another alternative embodiment, the first, second, and third inner convex strips P divide the light exit aperture into three sub-light exit apertures, each with the same area.

[0086] In another embodiment of this disclosure, see [link to relevant documentation]. Figure 6 The pattern of the inner convex lens Lin is linear; for example, it may include a linearly extending inner convex strip P, the two ends of which are connected to the inner edges of the outer convex lens Lout. Thus, the light-emitting aperture of the convex lens assembly LENS is divided into two sub-light-emitting apertures by the inner convex strip P. Furthermore, these two sub-light-emitting apertures have the same area.

[0087] In another embodiment of this disclosure, see [link to relevant documentation]. Figure 5 The pattern of the internal convex lens Lin is formed by two Y-shaped joints. The internal convex lens Lin includes a first internal convex strip P, a second internal convex strip P, a third internal convex strip P, a fourth internal convex strip P, a fifth internal convex strip P, and a sixth internal convex strip P. The inner ends of the first, second, and third internal convex strips P are connected to form a first Y-shaped pattern, and the inner ends of the fourth, fifth, and sixth internal convex strips P are connected to form a second Y-shaped pattern. The outer ends of the second and fourth internal convex strips P are connected to each other, and the outer ends of the third and fifth internal convex strips P are connected to each other. Thus, the second, third, fourth, and fifth internal convex strips P are arranged in a quadrilateral.

[0088] In one alternative configuration, the first Y-pattern and the second Y-pattern are arranged symmetrically. In another alternative configuration, the outer ends of the first inner convex strip P, the second inner convex strip P, the third inner convex strip P, the fourth inner convex strip P, the fifth inner convex strip P, and the sixth inner convex strip P are all connected to the outer convex mirror Lout.

[0089] In one alternative approach, see Figure 5The first inner convex strip P is parallel to the sixth inner convex strip P, the second inner convex strip P is parallel to the fifth inner convex strip P, and the third inner convex strip P is parallel to the fourth inner convex strip P. For example, the external convex mirror Lout can be an axisymmetric hexagon, where any two opposite sides of the hexagon are parallel, and it includes two long sides of equal length and four short sides of equal length. Specifically, the outer end of the first inner convex strip P connects to the intersection of two adjacent short sides, and the outer end of the sixth inner convex strip P connects to the intersection of another two adjacent short sides; and the first and sixth inner convex strips P are parallel to the long sides. The outer ends of the second and fourth inner convex strips P connect to the midpoint of one long side, and the outer ends of the third and fifth inner convex strips P connect to the midpoint of another long side; the second and fourth inner convex strips P are parallel to one set of opposite short sides, and the third and fifth inner convex strips P are parallel to another set of opposite short sides.

[0090] The following is a further explanation and description of the structure, principle and effect of the display panel disclosed herein from the perspective of the film layer.

[0091] See Figure 11 The display panel may include a substrate F100, a pixel layer F300 and a light extraction layer F600 stacked in sequence.

[0092] The substrate F100 can be an inorganic material or an organic material. For example, in one embodiment of this disclosure, the substrate F100 can be made of glass materials such as soda-lime glass, quartz glass, or sapphire glass, or metal materials such as stainless steel, aluminum, or nickel. In another embodiment of this disclosure, the substrate F100 can be made of polymethyl methacrylate (PMMA), polyvinyl alcohol (PVA), polyvinylphenol (PVP), polyether sulfone (PES), polyimide, polyamide, polyacetal, polycarbonate (PC), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or a combination thereof. In another embodiment of this disclosure, the substrate F100 may also be a flexible substrate F100, for example, the material of the substrate F100 may be polyimide (PI). The substrate F100 may also be a composite of multiple materials. For example, in one embodiment of this disclosure, the substrate F100 may include a bottom film, a pressure-sensitive adhesive layer, a first polyimide layer and a second polyimide layer stacked sequentially.

[0093] In some embodiments, the display panel may also have a driving circuit layer F200 between the substrate F100 and the pixel layer F300, the driving circuit layer being used to drive the sub-pixels in the pixel layer.

[0094] Optionally, in the driving circuit layer F200, any pixel driving circuit may include a transistor F200M and a storage capacitor. Further, the transistor F200M can be a thin-film transistor (TFT), which can be a top-gate TFT, a bottom-gate TFT, or a dual-gate TFT; the material of the active layer of the TFT can be amorphous silicon semiconductor material, low-temperature polycrystalline silicon semiconductor material, metal-oxide semiconductor material, organic semiconductor material, or other types of semiconductor material; the TFT can be an N-type TFT or a P-type TFT. In one embodiment of this disclosure, the TFT is a low-temperature polycrystalline silicon transistor.

[0095] It is understood that any two transistors in a pixel driving circuit can be of the same or different types. For example, in one embodiment, some transistors in a pixel driving circuit can be N-type transistors and some transistors can be P-type transistors. Further exemplarily, in another embodiment of this disclosure, in a pixel driving circuit, the active layer material of some transistors can be low-temperature polycrystalline silicon semiconductor material, and the active layer material of some transistors can be metal-oxide-semiconductor material.

[0096] Optionally, the driving circuit layer F200 may include a semiconductor layer F203, a gate insulating layer F204, a gate layer F205, an interlayer dielectric layer F206, and a source / drain metal layer F207, stacked between the substrate F100 and the pixel layer F300. Each thin-film transistor and storage capacitor may be formed from the semiconductor layer F203, gate insulating layer F204, gate layer F205, interlayer dielectric layer F206, and source / drain metal layer F207. The positional relationship of each layer can be determined based on the thin-film transistor's layer structure. For example, in one embodiment of this disclosure, the driving circuit layer F200 may include a semiconductor layer F203, a gate insulating layer F204, a gate layer F205, an interlayer dielectric layer F206, and a source / drain metal layer F207 stacked sequentially, thus forming a top-gate thin-film transistor. For example, in another embodiment of this disclosure, the driving circuit layer F200 may include a gate layer F205, a gate insulating layer F204, a semiconductor layer F203, an interlayer dielectric layer F206, and a source / drain metal layer F207 stacked sequentially, thus forming a bottom-gate thin-film transistor. The driving circuit layer F200 may also employ a dual-gate layer F205 structure, where the gate layer F205 may include a first gate layer and a second gate layer, and the gate insulating layer F204 may include a first gate insulating layer for isolating the semiconductor layer F203 and the first gate layer, and a second gate insulating layer for isolating the first gate layer and the second gate layer. For example, in one embodiment of this disclosure, the driving circuit layer F200 may include a semiconductor layer F203, a first gate insulating layer, a first gate layer, a second gate insulating layer, a second gate layer, an interlayer dielectric layer F206, and a source / drain metal layer F207 stacked sequentially on one side of the substrate F100.

[0097] Optionally, the driving circuit layer F200 may also include a passivation layer, which may be disposed on the surface of the source / drain metal layer F207 away from the substrate F100 in order to protect the source / drain metal layer F207.

[0098] Optionally, the driving circuit layer F200 may further include a buffer material layer disposed between the substrate F100 and the semiconductor layer F203, wherein the semiconductor layer F203, the gate layer F205, etc., are all located on the side of the buffer material layer away from the substrate F100. The material of the buffer material layer may be an inorganic insulating material such as silicon oxide or silicon nitride. The buffer material layer may be a single inorganic material layer or a multilayer stacked inorganic material layer. Exemplarily, in one embodiment of this disclosure, see... Figure 3 The buffer material layer may include a barrier layer F201 located near the substrate F100 and a buffer layer F202 located away from the substrate F100. The barrier layer F201 prevents components such as ions in the substrate F100 from penetrating into the driving circuit layer F200, thus maintaining the stable performance of the driving circuit layer F200. The buffer layer F202 can improve the adhesion between the driving circuit layer F200 and the substrate F100 and provide a stable environment for the driving circuit layer F200.

[0099] Optionally, the driving circuit layer F200 may further include a planarization layer F208 located between the source / drain metal layer F207 and the pixel layer F300, wherein the planarization layer F208 can provide a planarized surface for the pixel electrode. Optionally, the material of the planarization layer F208 may be an organic material.

[0100] The pixel layer F300 may be provided with light-emitting elements electrically connected to the pixel driving circuit, and the light-emitting elements may serve as sub-pixels of the display panel. Thus, the pixel layer is provided with an array of light-emitting elements, and each light-emitting element emits light under the control of the pixel driving circuit. In this disclosure, the light-emitting elements may be organic light-emitting diodes (OLEDs), micro LEDs, quantum dot-organic light-emitting diodes (QD-OLEDs), or other types of light-emitting elements. Exemplarily, in one embodiment of this disclosure, the light-emitting element is an organic light-emitting diode (OLED), and the display panel is an OLED display panel. Below, taking an organic light-emitting diode as an example, a feasible structure of the pixel layer is described exemplarily.

[0101] Optionally, the pixel layer F300 may include a pixel electrode layer F301, a pixel definition layer F302, a support pillar layer F303, an organic light-emitting functional layer F304, and a common electrode layer F305, which are stacked sequentially. The pixel electrode layer F301 has multiple pixel electrodes in the display area of ​​the display panel; the pixel definition layer F302 has multiple through-holes in the display area, each corresponding to one of the pixel electrodes, with each pixel opening exposing at least a portion of the corresponding pixel electrode. The support pillar layer F303 includes multiple support pillars in the display area, and these pillars are located on the surface of the pixel definition layer F302 away from the substrate F100, to support a fine metal mask (FMM) during the vapor deposition process. The organic light-emitting functional layer F304 at least covers the pixel electrodes exposed by the pixel definition layer F302. The organic light-emitting functional layer F304 may include an organic electroluminescent material layer, and may include one or more of the following: a hole injection layer, a hole transport layer, an electron blocking layer, an electron transport layer, and an electron injection layer. The individual layers of the organic light-emitting functional layer F304 can be prepared by a vapor deposition process, and a fine metal mask or an open mask can be used to define the pattern of each layer during vapor deposition. A common electrode layer F305 can cover the organic light-emitting functional layer F304 in the display area. Thus, the pixel electrode, the common electrode layer F305, and the organic light-emitting functional layer F304 located between the pixel electrode and the common electrode layer F305 form an organic light-emitting diode F300D, and any one of the organic light-emitting diodes can serve as a sub-pixel of the display panel.

[0102] In some embodiments, the display panel may further include a thin-film encapsulation layer F400. The thin-film encapsulation layer F400 is disposed on the surface of the pixel layer F300 away from the substrate F100, and may include alternately stacked inorganic and organic encapsulation layers. The inorganic encapsulation layer effectively blocks external moisture and oxygen, preventing water and oxygen from invading the organic light-emitting functional layer F304 and causing material degradation. Optionally, the edge of the inorganic encapsulation layer may be located in the peripheral region. The organic encapsulation layer is located between two adjacent inorganic encapsulation layers to achieve planarization and reduce stress between the inorganic encapsulation layers. The edge of the organic encapsulation layer may be located between the edge of the display area and the edge of the inorganic encapsulation layer. Exemplarily, the thin-film encapsulation layer F400 includes a first inorganic encapsulation layer F401, an organic encapsulation layer F402, and a second inorganic encapsulation layer F403, sequentially stacked on the side of the pixel layer F300 away from the substrate F100.

[0103] In some embodiments, the display panel may further include a touch function layer F500, which is disposed on the side of the thin film encapsulation layer F400 away from the substrate F100, and is used to realize touch operation of the display panel.

[0104] Further, the touch functional layer F500 may include a first touch metal layer, a touch insulating layer, and a second touch metal layer stacked sequentially; the second touch metal layer is located on the side of the first touch metal layer away from the substrate F100. One or both of the first and second touch metal layers are used to form touch electrodes. In one embodiment of this disclosure, the touch functional layer F500 is disposed on the side of the thin film encapsulation layer F400 away from the substrate.

[0105] Optionally, a touch buffer layer may be included between the first touch metal layer and the thin-film encapsulation layer. The touch buffer layer may be made of an inorganic material, such as silicon nitride, silicon oxide, or silicon oxynitride. It is understood that in other embodiments of this disclosure, the outermost inorganic encapsulation layer of the thin-film encapsulation layer F400 may also be reused as a touch buffer layer.

[0106] In some embodiments of this disclosure, see Figure 15 The light extraction layer F600 is located between the pixel layer F300 and the thin film encapsulation layer F400. For example, the light-sparse layer F601 can be disposed on the common electrode layer, the light-dense layer F602 covers the light-sparse layer F601, and the thin film encapsulation layer F400 covers the light-dense layer F602.

[0107] Furthermore, the material of the optically rarefied layer F601 can be an organic material, for example, the same material as the pixel definition layer. Understandably, the optically rarefied layer F601 can also be doped with inorganic materials as reflective particles, such as nano-titanium dioxide, to adjust the refractive index of the optically rarefied layer F601.

[0108] Furthermore, the optical density layer F602 can be made of inorganic materials, such as silicon nitride, silicon oxynitride, silicon oxide, etc., especially silicon nitride. In this way, the optical density layer F602 can also provide encapsulation protection for the sub-pixels Psub in the pixel layer F300.

[0109] In other embodiments of this disclosure, see [link to relevant documentation]. Figure 12 and Figure 13The light extraction layer F600 can be located on the thin-film encapsulation layer F400 (away from the surface of the substrate F100). The optically dense layer F601 can be disposed on the surface of the thin-film encapsulation layer F400, and its material can be an organic material, such as resin or ink, and particularly an optical adhesive. The high-refractive-index material can be an organic material or a composite of organic and inorganic materials. Exemplarily, in one embodiment of this disclosure, the material of the optically dense layer F602 can be acrylic or the like. Further exemplarily, in another embodiment of this disclosure, the high-refractive-index material can be a resin doped with inorganic reflective particles, such as a resin doped with nano-titanium dioxide.

[0110] In other embodiments of this disclosure, see [link to relevant documentation]. Figure 14 and Figure 11 The light extraction layer F600 can be located on the touch functional layer F500 (on a surface away from the substrate F100). The light-dense layer F601 can be disposed on the surface of the second touch metal layer, and its material can be an organic material, such as resin or ink, and particularly optical adhesive. The light-dense layer F602 can be an organic material or a composite of organic and inorganic materials. Exemplarily, in one embodiment of this disclosure, the material of the light-dense layer F602 can be acrylic, etc. Further exemplarily, in another embodiment of this disclosure, the high refractive index material can be a resin doped with inorganic reflective particles, such as a resin doped with nano-titanium dioxide.

[0111] It is understood that in the display panel disclosed herein, the light extraction layer F600 may also be disposed at other film layer positions, such as on the side of the pixel layer F300 away from the substrate F100.

[0112] Optionally, in this disclosure, both the light-dense layer F602 and the light-sparse layer F601 are made of light-transmitting materials.

[0113] Optionally, when forming the light extraction layer F600 of this disclosure, a light-sparse material layer can be formed first, and then the light-sparse material layer can be patterned to form each convex lens component LENS; then, a light-dense layer F602 covering each convex lens component LENS can be formed by spin coating, printing, printing or deposition.

[0114] This disclosure also provides a display device, which includes any of the display panels described in the above-described display panel embodiments. The display device can be a mobile phone screen, computer screen, television screen, or other types of display device. Since this display device has any of the display panels described in the above-described display panel embodiments, it has the same beneficial effects, and will not be repeated here.

[0115] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A display panel, comprising a substrate, a pixel layer, and a light extraction layer sequentially stacked thereon; wherein, The pixel layer includes multiple sub-pixels; the light extraction layer includes a light-sparse layer and a light-dense layer covering the light-sparse layer, wherein the refractive index of the light-sparse layer is lower than that of the light-dense layer. The light-reducing layer has a plurality of convex mirror assemblies that are arranged one-to-one with the plurality of sub-pixels. The convex mirror assembly has a light-emitting aperture that overlaps with the corresponding sub-pixel. The convex mirror assembly includes an external convex mirror surrounding the corresponding sub-pixel. The convex lens assembly at least partially includes an inner convex lens overlapping the corresponding sub-pixel, and at least a portion of the light-emitting aperture is formed between the outer convex lens and the inner convex lens.

2. The display panel according to claim 1, wherein, The sub-pixel includes a first sub-pixel and a second sub-pixel, wherein the light-emitting area of ​​the first sub-pixel is larger than the light-emitting area of ​​the second sub-pixel; the convex lens assembly includes a first convex lens assembly corresponding to the first sub-pixel and a second convex lens assembly corresponding to the second sub-pixel; The first convex lens assembly has the internal convex lens.

3. The display panel according to claim 2, wherein, The second convex lens assembly does not have the internal convex lens.

4. The display panel according to claim 2, wherein, The second convex lens assembly also has the internal convex lens; The inner convex mirror of the first convex mirror assembly divides its light-emitting aperture into multiple first sub-light-emitting apertures; the inner convex mirror of the second convex mirror assembly divides its light-emitting aperture into multiple second sub-light-emitting apertures; The number of the first sub-light-emitting apertures is greater than the number of the second sub-light-emitting apertures.

5. The display panel according to claim 2, wherein, The second convex lens assembly also has the internal convex lens; The edge length of the inner convex lens of the first convex lens assembly is a first length, and the edge length of the inner convex lens of the second convex lens assembly is a second length; the first length is greater than the second length.

6. The display panel according to claim 1, wherein, The internal convex mirror is a closed ring.

7. The display panel according to claim 6, wherein, The pattern of the inner convex mirror forms a concentric ring structure with the inner edge of the outer convex mirror.

8. The display panel according to claim 1, wherein, The internal convex mirror divides the light-emitting aperture into 2 to 8 sub-light-emitting apertures.

9. The display panel according to claim 1, wherein, The internal convex mirror is axially symmetric, centrally symmetric, or rotationally symmetric.

10. The display panel according to claim 1, wherein, The pattern of the convex mirror is X-shaped, Y-shaped, linear, or any combination of two of the above shapes.

11. The display panel according to claim 1, wherein, The internal convex mirror includes at least one internal convex strip, and at least one end of the internal convex strip is connected to the external convex mirror.

12. The display panel according to any one of claims 1 to 11, wherein, The internal convex mirror includes one or more internal convex strips; The slope angle of the side of the inner convex strip is in the range of 45° to 70°.

13. The display panel according to any one of claims 1 to 11, wherein, The internal convex mirror includes one or more internal convex strips; The height of the inner convex strip is in the range of 1 to 3 micrometers.

14. The display panel according to any one of claims 1 to 11, wherein, The internal convex mirror includes one or more internal convex strips; The width of the inner convex strip is in the range of 3 to 5 micrometers.

15. The display panel according to any one of claims 1 to 11, wherein, The display panel also includes a thin-film encapsulation layer located on the side of the pixel layer away from the substrate. The light extraction layer is sandwiched between the pixel layer and the thin film encapsulation layer.

16. The display panel according to claim 15, wherein, The optically rarefied layer is made of resin; the optically dense layer is made of silicon nitride.

17. The display panel according to any one of claims 1 to 11, wherein, The display panel further includes a thin-film encapsulation layer located on the surface of the pixel layer away from the substrate. The light extraction layer is located on the surface of the thin film encapsulation layer away from the substrate.

18. The display panel according to any one of claims 1 to 11, wherein, The display panel also includes a touch function layer located on the side of the pixel layer away from the substrate; The light extraction layer is located on the surface of the touch function layer away from the substrate.

19. A display device comprising the display panel according to any one of claims 1 to 18.

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