Display panel and display device

Abstract

A display panel, comprising a substrate, a plurality of light emitting elements located on one side of the substrate, a color film layer located on a side of the light emitting elements away from the substrate, the color film layer comprising a color resistance layer, a second film layer and a first film layer located between the light emitting elements and the color resistance layer, and the second film layer and the first film layer being stacked in sequence in a direction away from the substrate, the refractive index of the color resistance layer being different from the refractive index of the first film layer, the refractive index of the second film layer being greater than, equal to, or less than the refractive index of the first film layer, the orthographic projection of the color resistance layer and the second film layer on the substrate covering the orthographic projection of the light emitting elements on the substrate, and the orthographic projection of the first film layer and at least part of the light emitting elements on the substrate partially overlapping.

Description

Display panel and display device TECHNICAL FIELD

[0001] The embodiments of the present disclosure belong to the technical field of display, and particularly relate to a display panel and a display device. BACKGROUND

[0002] OLED (Organic Light-Emitting Diode) display screens are widely concerned due to their advantages of self-luminous, low power consumption, thinness, flexibility, bright colors, high contrast, fast response rate, etc.

[0003] SUMMARY

[0004] In a first aspect, the embodiments of the present disclosure provide a display panel, comprising a substrate,

[0005] a plurality of light emitting elements located on one side of the substrate;

[0006] a color film layer located on a side of the light emitting elements away from the substrate,

[0007] the color film layer comprises a color resistance layer;

[0008] a second film layer and a first film layer located between the light emitting elements and the color resistance layer, and the second film layer and the first film layer are sequentially stacked in a direction away from the substrate;

[0009] the refractive index of the color resistance layer is different from the refractive index of the first film layer;

[0010] the refractive index of the second film layer is greater than, equal to, or less than the refractive index of the first film layer;

[0011] the orthographic projection of the color resistance layer and the second film layer on the substrate covers the orthographic projection of the light emitting elements on the substrate;

[0012] the orthographic projection of the first film layer and at least part of the light emitting elements on the substrate partially overlaps.

[0013] In some embodiments, the orthographic projection of the light emitting elements on the substrate comprises a middle region and an edge region, and the edge region surrounds the periphery of the middle region.

[0014] the orthographic projection of the first film layer on the substrate at least partially overlaps with the edge region.

[0015] In some embodiments, the orthographic projection of the light emitting elements on the substrate comprises a middle region and an edge region, and the edge region surrounds the periphery of the middle region.

[0016] A projection of the first film layer onto the substrate at least partially overlaps the intermediate region.

[0017] In some embodiments, a projection of the light emitting element onto the substrate includes an intermediate region and an edge region surrounding a periphery of the intermediate region;

[0018] A projection of the first film layer onto the substrate at least partially overlaps the edge region.

[0019] A projection of the first film layer onto the substrate at least partially overlaps the intermediate region.

[0020] In some embodiments, the light emitting element includes a first color light emitting element, a second color light emitting element, and a third color light emitting element,

[0021] A projection of the first film layer and the first color light emitting element onto the substrate partially overlaps.

[0022] And / or, a projection of the first film layer and the second color light emitting element onto the substrate partially overlaps.

[0023] And / or, a projection of the first film layer and the third color light emitting element onto the substrate partially overlaps.

[0024] The first color light emitting element, the second color light emitting element, and the third color light emitting element have different light emitting colors.

[0025] In some embodiments, a projection of the first film layer onto the substrate at least partially overlaps the edge region of the first color light emitting element,

[0026] A projection of the first film layer onto the substrate covers a projection of the second color light emitting element and the third color light emitting element onto the substrate.

[0027] In some embodiments, a projection of the first film layer onto the substrate at least partially overlaps the edge region of the first color light emitting element,

[0028] A projection of the first film layer onto the substrate at least partially overlaps the intermediate region of the second color light emitting element,

[0029] A projection of the first film layer onto the substrate covers a projection of the third color light emitting element onto the substrate.

[0030] In some embodiments, a light emitting color of the first color light emitting element includes red, green, or blue.

[0031] The light-emitting color of the second color light-emitting element comprises red, green or blue;

[0032] The light-emitting color of the third color light-emitting element comprises red, green or blue.

[0033] In some embodiments, the color film layer further comprises a black matrix, located between the first film layer and the color resistance layer,

[0034] The orthographic projection of the first film layer and the black matrix on the substrate at least partially overlaps;

[0035] Alternatively, the black matrix and the first film layer are located in the same layer,

[0036] The orthographic projection of the first film layer and the black matrix on the substrate does not overlap;

[0037] The black matrix has a plurality of openings, and the orthographic projection of the light-emitting element on the substrate is located within the orthographic projection area of the openings on the substrate.

[0038] In some embodiments, further comprising a protective layer, located between the black matrix and the second film layer,

[0039] The first film layer is multiplexed as the protective layer.

[0040] In some embodiments, further comprising a touch layer, located between the light-emitting element and the first film layer,

[0041] The touch layer comprises a first electrode layer, an insulating layer and a second electrode layer, which are sequentially stacked in the direction away from the substrate,

[0042] The orthographic projection of the first electrode layer and the second electrode layer on the substrate is located within the orthographic projection area of the black matrix on the substrate,

[0043] The second film layer is multiplexed as the insulating layer.

[0044] In some embodiments, further comprising a touch layer, located between the black matrix and the second film layer,

[0045] The touch layer comprises a first electrode layer, an insulating layer and a second electrode layer, which are sequentially stacked in the direction away from the substrate,

[0046] The orthographic projection of the first electrode layer and the second electrode layer on the substrate is located within the orthographic projection area of the black matrix on the substrate,

[0047] The first film layer is multiplexed as the insulating layer.

[0048] In some embodiments, the first film layer has a refractive index ranging from 1.4 to 1.5.

[0049] The second film layer has a refractive index ranging from 1.7 to 1.85.

[0050] The color resist layer has a refractive index ranging from 1.5 to 1.75.

[0051] In some embodiments, the first film layer has the same outer contour shape as the light-emitting element when projected orthogonally onto the substrate.

[0052] In a second aspect, the present disclosure provides a display device, comprising the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0053] The accompanying drawings are included to provide a further understanding of embodiments of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and serve to explain the principles of the present disclosure, and do not limit the present disclosure. The above and other features and advantages of the present disclosure will become more apparent from the detailed description of the example embodiments taken in conjunction with the accompanying drawings, in which:

[0054] FIG. 1 is a schematic cross-sectional view of a structure in which a COE is disposed on the display side of an OLED display panel according to the related art.

[0055] FIG. 2a is a schematic cross-sectional view of a display panel according to an embodiment of the present disclosure.

[0056] FIG. 2b is a schematic cross-sectional view of another display panel according to an embodiment of the present disclosure.

[0057] FIG. 2c is a schematic cross-sectional view of still another display panel according to an embodiment of the present disclosure.

[0058] FIG. 2d is a schematic cross-sectional view of yet another display panel according to an embodiment of the present disclosure.

[0059] FIG. 2e is a schematic cross-sectional view of still another display panel according to an embodiment of the present disclosure.

[0060] FIG. 2f is a schematic cross-sectional view of yet another display panel according to an embodiment of the present disclosure.

[0061] FIG. 2g is a schematic cross-sectional view of still another display panel according to an embodiment of the present disclosure.

[0062] FIG. 3a is a schematic view of refraction of light rays when the refractive index of a second film layer is equal to the refractive index of a first film layer and the refractive index of the first film layer is less than the refractive index of a color resist layer.

[0063] FIG. 3b is a schematic diagram of refraction of light rays when the refractive index of the first film layer is less than the refractive index of the color resist layer and the refractive index of the color resist layer is less than the refractive index of the second film layer.

[0064] FIG. 3c is a schematic diagram of refraction of light rays when the refractive index of the first film layer is less than the refractive index of the second film layer and the refractive index of the second film layer is less than the refractive index of the color resist layer.

[0065] FIG. 3d is a schematic diagram of refraction of light rays when the refractive index of the second film layer is less than the refractive index of the first film layer and the refractive index of the first film layer is less than the refractive index of the color resist layer.

[0066] FIG. 3e is a schematic diagram of refraction of light rays when the refractive index of the first film layer is less than the refractive index of the second film layer and the refractive index of the second film layer is less than the refractive index of the color resist layer.

[0067] FIG. 4a is a schematic diagram of refraction of light rays when the refractive index of the second film layer is equal to the refractive index of the first film layer and the refractive index of the first film layer is greater than the refractive index of the color resist layer.

[0068] FIG. 4b is a schematic diagram of refraction of light rays when the refractive index of the first film layer is greater than the refractive index of the color resist layer and less than the refractive index of the second film layer.

[0069] FIG. 4c is a schematic diagram of refraction of light rays when the refractive index of the first film layer is greater than the refractive index of the second film layer and the refractive index of the second film layer is greater than the refractive index of the color resist layer.

[0070] FIG. 4d is a schematic diagram of refraction of light rays when the refractive index of the first film layer is greater than the refractive index of the color resist layer and the refractive index of the color resist layer is greater than the refractive index of the second film layer.

[0071] FIG. 4e is a schematic diagram of refraction of light rays when the refractive index of the first film layer is greater than the refractive index of the second film layer and the refractive index of the second film layer is greater than the refractive index of the color resist layer.

[0072] FIG. 5 is a simulation diagram of the improvement effect of the large viewing angle red color shift of the display panel in FIG. 2a relative to the display panel in FIG. 1. DETAILED DESCRIPTION

[0073] In order for those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, a display panel and a display device provided by the embodiments of the present disclosure are further described in detail below with reference to the accompanying drawings and specific embodiments.

[0074] The embodiments shown will be described in greater detail in the following with reference to the accompanying drawings, but the embodiments shown can be embodied in various forms and should not be interpreted as being limited to the embodiments set forth in the present disclosure. Rather, the purpose of providing these embodiments is to make the present disclosure thorough and complete and to fully convey the scope of the present disclosure to those skilled in the art.

[0075] Embodiments of the present disclosure are not limited to the embodiments shown in the drawings, but include modifications of configurations formed based on manufacturing processes. Therefore, the regions illustrated in the drawings have a schematic property, and the shape of the regions shown in the drawings exemplifies a specific shape of the regions, but is not intended to be restrictive.

[0076] With the development of COE (Color film On Encapsulation) technology, the requirement for display effect of display products is getting higher and higher.

[0077] Referring to FIG. 1, it is a structure cross-sectional schematic diagram of setting COE on the display side of an OLED display panel in the related art, wherein the display panel includes a driving substrate 8, a light emitting device layer, an encapsulation layer 6, a buffer layer 7, a touch layer 5, a protection layer 9, a color film layer 3 and a planarization layer 10 which are sequentially stacked on one side of the driving substrate 8; each film layer (such as the buffer layer 7, the touch layer 5, the protection layer 9, the color film layer 3, etc.) located on the side of the encapsulation layer 6 away from the driving substrate 8 is provided on the whole surface. The light emitting device layer includes light emitting elements 2 of different colors, and the display panel further includes a pixel definition layer 4 located between the driving substrate 8 and the encapsulation layer 6, the pixel definition layer 4 is provided with a first opening, and the light emitting elements 2 are located in the first opening of the pixel definition layer 4. The color film layer 3 includes a color resistance layer 32 and a black matrix 33, the color resistance layer 32 is located on the side of the black matrix 33 away from the driving substrate 8, the black matrix 33 is provided with a second opening, the orthographic projection of the light emitting elements 2 on the driving substrate 8 is located in the orthographic projection area of the second opening on the driving substrate 8, that is, the black matrix 33 does not form an obstruction to the light emitting elements 2, and the color resistance layer 32 covers at least the second opening. Setting the color film layer 3 on the display side of the OLED display panel can improve the color gamut of the OLED display panel on the one hand, and the color film layer can replace the polarizer to reduce the reflection of ambient light by the OLED display panel on the other hand.

[0078] In the related art, the OLED display panel has a problem of viewing angle color deviation in display, and the color deviation color and the color deviation viewing angle of different types of OLED display panels are different; how to improve various viewing angle color deviations of the OLED display panel is a problem to be solved at present.

[0079] To solve the above technical problems in the related art, in a first aspect, the display panel is provided, referring to FIGS. 2a-2g, wherein the display panel comprises a substrate 1, a plurality of light emitting elements 2 located on one side of the substrate 1; a color film layer 3 located on a side of the light emitting element 2 away from the substrate 1, the color film layer 3 comprising a color resistance layer 32; a second film layer 34 and a first film layer 31 located between the light emitting element 2 and the color resistance layer 32, and the second film layer 34 and the first film layer 31 are sequentially stacked in a direction away from the substrate 1; the refractive index of the color resistance layer 32 is different from the refractive index of the first film layer 31; the refractive index of the second film layer 34 is greater than, equal to, or less than the refractive index of the first film layer 31; the orthographic projection of the color resistance layer 32 and the second film layer 34 on the substrate 1 covers the orthographic projection of the light emitting element 2 on the substrate 1; and the orthographic projection of the first film layer 31 and at least part of the light emitting element 2 on the substrate 1 partially overlaps.

[0080] The light emitting element 2 can be an OLED light emitting element. The substrate 1 comprises a base and a pixel circuit arranged on one side of the base, and the pixel circuit is a conventional pixel circuit, which will not be described here. The display panel further comprises a pixel definition layer 4 located between the substrate 1 and the color film layer 3, and the pixel definition layer 4 has an opening therein, and the light emitting element 2 is located in the opening. The orthographic projection area of the light emitting element 2 on the substrate 1 refers to the effective light emitting area of the light emitting element 2 or the opening area (i.e., the light emitting opening area) of the opening arranged in the pixel definition layer 4.

[0081] In some embodiments, referring to FIG. 3a, a schematic diagram of light refraction when the refractive index of the second film layer is equal to the refractive index of the first film layer and the refractive index of the first film layer is less than the refractive index of the color resistance layer; FIG. 3b is a schematic diagram of light refraction when the refractive index of the first film layer is less than the refractive index of the color resistance layer and the refractive index of the color resistance layer is less than the refractive index of the second film layer; FIG. 3c is a schematic diagram of light refraction when the refractive index of the first film layer is less than the refractive index of the second film layer and the refractive index of the second film layer is less than the refractive index of the color resistance layer; FIG. 3d is a schematic diagram of light refraction when the refractive index of the second film layer is less than the refractive index of the first film layer and the refractive index of the first film layer is less than the refractive index of the color resistance layer; and FIG. 3e is a schematic diagram of light refraction when the refractive index of the first film layer is less than the refractive index of the second film layer and the refractive index of the second film layer is less than the refractive index of the color resistance layer. As can be seen from FIGS. 3a-3e, when the refractive index of the first film layer 31 is less than the refractive index of the color resistance layer 32, the light L emitted by the light emitting element 2 passing through the contact interfaces of the first film layer 31 and the second film layer 34 and the first film layer 31 and the color resistance layer 32 is shifted to the left relative to the light L' emitted by the light emitting element 2 without passing through the contact interfaces of the first film layer 31 and the second film layer 34 and the first film layer 31 and the color resistance layer 32 (the light L' only passes through the contact interface of the color resistance layer 32 and the second film layer 34), thereby reducing or increasing the light of a certain color emitted from the overlapping area of the light emitting element 2 and the first film layer 31, and further improving or eliminating the viewing angle color deviation of the display panel.

[0082] In some embodiments, referring to FIG. 4a, a schematic diagram of light refraction when the refractive index of the second film layer is equal to the refractive index of the first film layer and the refractive index of the first film layer is greater than the refractive index of the color resist layer; FIG. 4b is a schematic diagram of light refraction when the refractive index of the first film layer is greater than the refractive index of the color resist layer and less than the refractive index of the second film layer; FIG. 4c is a schematic diagram of light refraction when the refractive index of the first film layer is greater than the refractive index of the second film layer and the refractive index of the second film layer is greater than the refractive index of the color resist layer; FIG. 4d is a schematic diagram of light refraction when the refractive index of the first film layer is greater than the refractive index of the color resist layer and the refractive index of the color resist layer is greater than the refractive index of the second film layer; FIG. 4e is a schematic diagram of light refraction when the refractive index of the first film layer is greater than the refractive index of the second film layer and the refractive index of the second film layer is greater than the refractive index of the color resist layer; as can be seen from FIGS. 4a-4e, when the refractive index of the first film layer 31 is greater than the refractive index of the color resist layer 32, the light L emitted by the light emitting element 2 passing through the contact interface of the first film layer 31 and the second film layer 34 and the contact interface of the first film layer 31 and the color resist layer 32 is shifted to the right relative to the light L' (the light L' only passes through the contact interface of the color resist layer 32 and the second film layer 34) that does not pass through the contact interface of the first film layer 31 and the second film layer 34 and the contact interface of the first film layer 31 and the color resist layer 32, thereby reducing or increasing the light of a certain color emitted from the overlapping area of the light emitting element 2 and the first film layer 31, and further improving or eliminating the viewing angle color deviation of the display panel.

[0083] In some embodiments, referring to FIGS. 3a-3e and FIGS. 4a-4e, the refractive index of the second film layer 34 is n1, the refractive index of the color resist layer 32 is n2, and the refractive index of the first film layer 31 is n3, the distance of the light emitted by the light emitting element 2 translated after refraction through the first film layer 31 is wherein b is the thickness of the first film layer 31, and a is the incident angle of the light emitted by the light emitting element 2 when incident to the contact interface of the second film layer 34 and the first film layer 31.

[0084] In this embodiment, since the refractive index of the color resist layer 32 is different from the refractive index of the first film layer 31, and the refractive index of the second film layer 34 is greater than, equal to, or less than the refractive index of the first film layer 31; therefore, in the area where the first film layer 31 and the orthographic projection of the light emitting element 2 overlap, when the light emitted by the light emitting element 2 passes through the contact interface between the first film layer 31 and the second film layer 34 and the contact interface between the first film layer 31 and the color resist layer 32, the light will be refracted, and in the area where the first film layer 31 and the orthographic projection of the light emitting element 2 do not overlap, the light emitted by the light emitting element 2 only passes through the contact interface between the color resist layer 32 and the second film layer 34 and is emitted; compared with the light emitted through the area where the first film layer 31 and the orthographic projection of the light emitting element 2 overlap, the light emitted through the area where the first film layer 31 and the orthographic projection of the light emitting element 2 do not overlap is offset; when there is color deviation in a certain viewing angle of the display panel, by setting the first film layer 31 and making it at least partially overlap with the orthographic projection of the light emitting element 2 on the substrate 1, the light emitted by the light emitting element 2 and passing through the overlapping area of the light emitting element 2 and the first film layer 31 is offset, thereby reducing or increasing the light of a certain color emitted through the overlapping area of the light emitting element 2 and the first film layer 31, and further improving or eliminating the color deviation of the display panel at this viewing angle, that is, by using the offset of the light in the overlapping area of the light emitting element 2 and the first film layer 31, the viewing angle color deviation phenomenon of the display panel can be improved or eliminated, and the display effect of the display panel can be improved.

[0085] In some embodiments, referring to FIG. 2a, it is a partial cross-sectional schematic view of a display panel in an embodiment of the present disclosure; wherein the orthographic projection of the light emitting element 2 on the substrate 1 includes a middle area S1 and an edge area S2, and the edge area S2 surrounds the periphery of the middle area S1; the orthographic projection of the first film layer 31 on the substrate 1 at least partially overlaps with the edge area S2.

[0086] The division of the middle area S1 and the edge area S2 of the orthographic projection of the light emitting element 2 on the substrate 1 has no clear boundary and can be arbitrarily divided, as long as the middle area S1 is an area surrounding and covering the center of the orthographic projection area of the light emitting element 2, the edge area S2 is an area closer to the edge of the orthographic projection area of the light emitting element 2 relative to the middle area S1, and the edge area S2 is located on the side of the middle area S1 away from the center of the orthographic projection area of the light emitting element 1. The area of the middle area S1 can be greater than the area of the edge area S2, and the area of the middle area S1 can also be less than or equal to the area of the edge area S2.

[0087] By making the orthographic projection of the first film layer 31 on the substrate 1 at least partially overlap the edge region S2, the large viewing angle color shift phenomenon of the display panel can be improved or eliminated. For example, the viewing angle range of the display panel is ±75°, and there is a red color shift phenomenon in the range of ±60°-±75°, the refractive index of the color resistance layer 32 can be set to be less than the refractive index of the first film layer 31; and the orthographic projection of the first film layer 31 on the substrate 1 at least partially overlaps the edge region S2 of the orthographic projection of the red light emitting element on the substrate 1, the position of the first film layer 31 makes the red light emitted by the red light emitting element deviate to the outside of the edge region S2 and out of the field of view, thereby reducing the red light in the viewing angle range of ±60°-±75° of the display panel, and further improving or eliminating the red color shift phenomenon of the display panel in the large viewing angle (±60°-±75°).

[0088] Referring to FIG. 5, it is a simulation diagram of the improvement effect of the display panel in FIG. 2a on the large viewing angle red color shift of the display panel in FIG. 1; FIG. 5 is a CIE1931 standard chromaticity coordinate, and the JNCD in the figure is an index of color accuracy. The starting point O of the two simulation curves represents the white point coordinate at 0° viewing angle. The simulation curve of the large viewing angle red color shift of the display panel in FIG. 2a and the simulation curve of the large viewing angle red color shift of the display panel in FIG. 1 represent the change of the screen color observed by the human eye with the increase of the viewing angle. Compared with FIG. 1, the simulation curve in FIG. 2a is closer to cyan in the color coordinate with the increase of the viewing angle, so that the red color shift observed by the human eye is obviously improved.

[0089] In some embodiments, referring to FIG. 2b, it is a partial cross-sectional schematic view of another display panel in the embodiments of the present disclosure; wherein the orthographic projection of the light emitting element 2 on the substrate 1 includes the middle region S1 and the edge region S2, and the edge region S2 surrounds the periphery of the middle region S1; the orthographic projection of the first film layer 31 on the substrate 1 at least partially overlaps the middle region S1.

[0090] By making the orthographic projection of the first film layer 31 on the substrate 1 at least partially overlap the middle region S1, the small viewing angle color shift phenomenon of the display panel can be improved or eliminated. For example, the viewing angle range of the display panel is ±75°, and there is a red color shift phenomenon in the range of 0°-±30°, the refractive index of the color resistance layer 32 can be set to be less than the refractive index of the first film layer 31; and the orthographic projection of the first film layer 31 on the substrate 1 at least partially overlaps the middle region S1 of the orthographic projection of the red light emitting element on the substrate 1, the position of the first film layer 31 makes the red light emitted by the red light emitting element deviate to the edge region S2 and deviate to the edge region S2, thereby reducing the red light in the viewing angle range of 0°-±30° of the display panel, and further improving or eliminating the red color shift phenomenon of the display panel in the small viewing angle (0°-±30°).

[0091] In some embodiments, referring to FIG. 2c, a schematic diagram of a partial cross-section of a display panel according to another embodiment of the present disclosure is shown, wherein the orthogonal projection of the light emitting element 2 on the substrate 1 includes a middle region S1 and an edge region S2, the edge region S2 surrounds the periphery of the middle region S1; the orthogonal projection of the first film layer 31 on the substrate 1 partially overlaps with the edge region S2; and the orthogonal projection of the first film layer 31 on the substrate 1 partially overlaps with the middle region S1.

[0092] By partially overlapping the orthogonal projection of the first film layer 31 on the substrate 1 with the middle region S1 and the edge region S2 respectively, the middle viewing angle color cast phenomenon of the display panel can be improved or eliminated. For example, the viewing angle range of the display panel is ±75°, and there is a red color cast phenomenon in the range of ±30° to ±60°, the refractive index of the color resistance layer 32 can be set to be less than the refractive index of the first film layer 31; and the orthogonal projection of the first film layer 31 on the substrate 1 partially overlaps with the middle region S1 and the edge region S2 of the orthogonal projection of the red light emitting element on the substrate 1 respectively, the position of the first film layer 31 makes the red light emitted by the red light emitting element deviate to the edge region S2 farther away from the middle region S1, thereby reducing the red light in the viewing angle range of ±30° to ±60° of the display panel, and further improving or eliminating the red color cast phenomenon of the display panel in the middle viewing angle (±30° to ±60°).

[0093] In the present embodiment, referring to FIGS. 2a-2c, the orthogonal projection of the first film layer 31 on the substrate 1 can overlap with any partial region within the orthogonal projection region of the light emitting element 2 on the substrate 1, thereby improving or eliminating the color cast phenomenon of the display panel at any viewing angle.

[0094] In some embodiments, referring to FIGS. 2a-2c, the light emitting element 2 includes a first color light emitting element, a second color light emitting element, and a third color light emitting element, the orthogonal projection of the first film layer 31 and the first color light emitting element on the substrate 1 partially overlaps; and / or, the orthogonal projection of the first film layer 31 and the second color light emitting element on the substrate 1 partially overlaps; and / or, the orthogonal projection of the first film layer 31 and the third color light emitting element on the substrate 1 partially overlaps; the light emitting colors of the first color light emitting element, the second color light emitting element, and the third color light emitting element are different.

[0095] According to different color deviations of the display panel, the first film layer 31 can be partially overlapped with the normal projection of the light-emitting element of different colors on the substrate 1 to adjust and improve the color deviation of the display panel. For example, if the display panel has red color deviation at a certain viewing angle, the first film layer 31 can be partially overlapped with the normal projection of the red light-emitting element on the substrate 1, so that the red light emitted by the red light-emitting element is deviated and moved out of the viewing angle range, thereby reducing the red light at the viewing angle and improving or eliminating the red color deviation of the display panel at the viewing angle.

[0096] In some embodiments, referring to FIG. 2d, which is a partial cross-sectional schematic view of another display panel in the embodiments of the present disclosure; the normal projection of the first film layer 31 on the substrate 1 is at least partially overlapped with the edge region S2 of the first color light-emitting element 201, and the normal projection of the first film layer 31 on the substrate 1 covers the normal projection of the second color light-emitting element 202 and the third color light-emitting element 203 on the substrate 1.

[0097] According to the above, the normal projection of the first film layer 31 on the substrate 1 is at least partially overlapped with the edge region S2 of the first color light-emitting element 201, which can improve or eliminate the large viewing angle first color deviation of the display panel; and the second color light-emitting element 202 and the third color light-emitting element 203 do not need to participate in the adjustment of the first color deviation. For example, if the viewing angle range of the display panel is ±75°, and there is red color deviation in the range of ±60° to ±75°, the refractive index of the color resistance layer 32 can be set to be less than the refractive index of the first film layer 31; and the normal projection of the first film layer 31 on the substrate 1 is at least partially overlapped with the edge region S2 of the normal projection of the red light-emitting element on the substrate 1, so that the red light emitted by the red light-emitting element is deviated to the edge region S2 and moved out of the field of view, thereby reducing the red light in the viewing angle range of ±60° to ±75° of the display panel, and improving or eliminating the large viewing angle (±60° to ±75°) red color deviation of the display panel.

[0098] In some embodiments, referring to FIG. 2e, which is a partial cross-sectional schematic view of another display panel in the embodiments of the present disclosure; the normal projection of the first film layer 31 on the substrate 1 is at least partially overlapped with the edge region S2 of the first color light-emitting element 201, and the normal projection of the first film layer 31 on the substrate 1 is at least partially overlapped with the middle region S1 of the second color light-emitting element 202, and the normal projection of the first film layer 31 on the substrate 1 covers the normal projection of the third color light-emitting element 203 on the substrate 1.

[0099] The first film layer 31 can be combined to adjust the color deviation of the display panel at a large viewing angle, thereby improving or eliminating the color deviation of the first color at a large viewing angle of the display panel. For example, the viewing angle range of the display panel is ±75°, and there is a red color deviation phenomenon in the range of ±60° to ±75°, the refractive index of the color resistance layer 32 can be set to be less than the refractive index of the first film layer 31; the first film layer 31 is at least partially overlapped with the edge region S2 of the red light emitting element on the substrate 1, and the first film layer 31 is located at a position to offset the red light emitted by the red light emitting element to the edge region S2 and out of the field of view, thereby reducing the red light in the viewing angle range of ±60° to ±75° of the display panel; at the same time, the first film layer 31 is at least partially overlapped with the middle region S1 of the green light emitting element on the substrate 1, and the first film layer 31 is located at a position to offset the green light emitted by the green light emitting element to the edge region S2, thereby increasing the green light in the viewing angle range of ±60° to ±75° of the display panel; the first film layer 31 is combined to adjust the light emitted by the red light emitting element and the green light emitting element, thereby improving or eliminating the red color deviation phenomenon in the viewing angle range of ±60° to ±75° of the display panel.

[0100] In some embodiments, the light emitting color of the first color light emitting element 201 includes red, green or blue; the light emitting color of the second color light emitting element 202 includes red, green or blue; and the light emitting color of the third color light emitting element 203 includes red, green or blue.

[0101] In some embodiments, referring to FIG. 2a, the color film layer 3 further includes a black matrix 33 between the first film layer 31 and the color resistance layer 32, and the first film layer 31 is at least partially overlapped with the black matrix 33 on the substrate 1; the black matrix 33 is provided with a plurality of openings, and the light emitting element 2 is located in the opening on the substrate 1.

[0102] In some embodiments, the opening of the black matrix 33 on the substrate 1 has an area greater than or equal to the area of the light emitting element 2 on the substrate 1.

[0103] In some embodiments, referring to FIGS. 2b and 2c, the color filter layer 3 further comprises a black matrix 33, the black matrix 33 can be in the same layer as the first film layer 31, and the orthographic projection of the first film layer 31 and the black matrix 33 on the substrate 1 does not overlap; a plurality of openings are formed in the black matrix 33, and the orthographic projection of the light emitting element 2 on the substrate 1 is located in the orthographic projection area of the openings on the substrate 1.

[0104] In some embodiments, the black matrix 33 and the first film layer 31 are in the same layer means that the black matrix and the first film layer 31 are in the same plane, or the distance between the black matrix 33 and the substrate 1 is equal to the distance between the first film layer 31 and the substrate 1.

[0105] In some embodiments, referring to FIG. 3b, the refractive index of the first film layer 31 ranges from 1.4 to 1.5; the refractive index of the second film layer 34 ranges from 1.7 to 1.85; and the refractive index of the color resistance layer 32 ranges from 1.5 to 1.75.

[0106] In some embodiments, referring to FIGS. 2a-2e, the display panel further comprises a touch layer 5 between the light emitting element 2 and the first film layer 31, the touch layer 5 comprises a first electrode layer 51, an insulating layer 52 and a second electrode layer 53, the first electrode layer 51, the insulating layer 52 and the second electrode layer 53 are sequentially stacked in the direction away from the substrate 1, the orthographic projection of the first electrode layer 51 and the second electrode layer 53 on the substrate 1 is located in the orthographic projection area of the black matrix 33 on the substrate 1, and the second film layer 34 is multiplexed as the insulating layer 52.

[0107] In some embodiments, referring to FIGS. 2a-2e, the display panel further comprises an encapsulation layer 6, a buffer layer 7 and a planarization layer 10, the encapsulation layer 6 and the buffer layer 7 are between the light emitting element 2 and the second film layer 34, and the encapsulation layer 6 and the buffer layer 7 are sequentially stacked away from the substrate 1. The planarization layer 10 is located on the side of the color filter layer 3 away from the substrate 1, and the planarization layer 10 can make the surface of the side of the color filter layer 3 away from the substrate 1 flat.

[0108] In some embodiments, referring to FIG. 2a, the display panel further comprises a protective layer 9 between the black matrix 33 and the second film layer 34, and the first film layer 31 is multiplexed as the protective layer 9. The protective layer 9 can make the surface of the side of the touch layer 5 away from the substrate 1 flat, thereby facilitating the formation of the color filter layer 3 on the flat surface, and also can protect the touch layer 5. In FIG. 2a, the first film layer 31 is obtained after patterning the protective layer 9.

[0109] In some embodiments, referring to FIG. 2f and FIG. 2g, FIG. 2f is a schematic view of a partial cross section of yet another display panel in embodiments of the present disclosure; FIG. 2g is a schematic view of a partial cross section of yet another display panel in embodiments of the present disclosure; wherein the display panel further comprises a touch layer 5 between the black matrix 33 and the second film layer 34, the touch layer 5 comprises a first electrode layer 51, an insulating layer 52 and a second electrode layer 53, the first electrode layer 51, the insulating layer 52 and the second electrode layer 53 are sequentially stacked in a direction away from the substrate 1, the orthographic projection of the first electrode layer 51 and the second electrode layer 53 on the substrate 1 is located within the orthographic projection area of the black matrix 33 on the substrate 1, and the first film layer 31 is reused as the insulating layer 52.

[0110] In some embodiments, referring to FIG. 2f and FIG. 2g, the insulating layer 52 originally arranged between the first electrode layer 51 and the second electrode layer 53 is reused as the insulating layer 52 between the first electrode layer 51 and the second electrode layer 53 after the protective layer is patterned to form the first film layer 31.

[0111] In some embodiments, referring to FIG. 2f and FIG. 2g, the insulating layer 52 originally arranged between the first electrode layer 51 and the second electrode layer 53 is reused as the first film layer 31 after the protective layer is patterned.

[0112] In some embodiments, referring to FIG. 2f and FIG. 2g, the encapsulation layer 6 and the buffer layer 7 are located between the light emitting element 2 and the first film layer 31, and the second film layer 34 is reused as the buffer layer 7.

[0113] In some embodiments, the thickness of the first film layer 31 ranges from 0.5 to 2 μm.

[0114] In some embodiments, the size of the overlapping area of the orthographic projection of the first film layer 31 and the light emitting element 2 on the substrate 1 can be adjusted according to the specific circumstances of the visual character deviation of the display panel, and the adjustment principle is as follows: the adjustment of the size of the overlapping area of the orthographic projection of the first film layer 31 and the light emitting element 2 on the substrate 1 can adjust the light quantity of the deviated light, for example, when the size of the overlapping area of the orthographic projection of the first film layer 31 and the light emitting element 2 on the substrate 1 is large, the light quantity of the deviated light emitted through the overlapping area of the orthographic projection of the first film layer 31 and the light emitting element 2 is large; when the size of the overlapping area of the orthographic projection of the first film layer 31 and the light emitting element 2 on the substrate 1 is small, the light quantity of the deviated light emitted through the overlapping area of the orthographic projection of the first film layer 31 and the light emitting element 2 is small; thereby the display panel can be adjusted to different degrees of visual character deviation.

[0115] In some embodiments, the material of the second film layer 34 comprises an inorganic insulating transparent material or an organic insulating transparent material; and the material of the first film layer 31 comprises an inorganic insulating transparent material or an organic insulating transparent material.

[0116] The inorganic insulating transparent material is, for example, silicon nitride, silicon oxide, silicon oxynitride, etc.

[0117] In some embodiments, the outer contour shape of the orthographic projection of the first film layer 31 on the substrate 1 is the same as the outer contour shape of the orthographic projection of the light emitting element 2 on the substrate 1.

[0118] In some embodiments, the orthographic projection shape of the first film layer 31 on the substrate 1 comprises any one or more of a ring shape, a circular shape, a rectangular shape, and a regular polygon shape.

[0119] The display panel provided by the embodiments of the present disclosure can make the light emitted by the light emitting element and passing through the overlapping area of the light emitting element and the first film layer deviate, so as to reduce or increase the light of a certain color emitted by the overlapping area of the light emitting element and the first film layer, and further improve or eliminate the visual color deviation of the display panel and improve the display effect of the display panel.

[0120] In a second aspect, the embodiments of the present disclosure further provide a display device comprising the display panel in the above embodiments.

[0121] By using the display panel in the above embodiments, the visual color deviation of the display device can be improved or eliminated, and the display effect of the display device can be improved.

[0122] The display device provided by the embodiments of the present disclosure can be an OLED panel, an OLED television, an OLED billboard, a display, a mobile phone, a navigator, or any product or component having a display function.

[0123] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also considered to be within the protection scope of the present disclosure.

Claims

1. A display panel, wherein, The substrate, A plurality of light emitting elements are located on one side of the substrate; A color film layer is located on the side of the light emitting elements away from the substrate, and the color film layer includes a color resist layer; A second film layer and a first film layer are located between the light emitting elements and the color resist layer, and the second film layer and the first film layer are sequentially stacked in a direction away from the substrate; The refractive index of the color resist layer is different from the refractive index of the first film layer; The orthographic projection of the color resist layer and the second film layer on the substrate covers the orthographic projection of the light emitting elements on the substrate; The orthographic projection of the first film layer and at least part of the light emitting elements on the substrate partially overlaps.

2. The display panel of claim 1, wherein, The orthographic projection of the light emitting elements on the substrate includes a middle region and an edge region, and the edge region surrounds the periphery of the middle region; The orthographic projection of the first film layer on the substrate at least partially overlaps the edge region.

3. The display panel of claim 1, wherein, The orthographic projection of the light emitting elements on the substrate includes a middle region and an edge region, and the edge region surrounds the periphery of the middle region; The orthographic projection of the first film layer on the substrate at least partially overlaps the middle region.

4. The display panel of claim 1, wherein, The orthographic projection of the light emitting elements on the substrate includes a middle region and an edge region, and the edge region surrounds the periphery of the middle region; The orthographic projection of the first film layer on the substrate partially overlaps the edge region; The orthographic projection of the first film layer on the substrate partially overlaps the middle region.

5. The display panel according to any one of claims 2-4, wherein, The light emitting elements include first color light emitting elements, second color light emitting elements, and third color light emitting elements, The orthographic projection of the first film layer and the first color light emitting elements on the substrate partially overlaps; And / or, the orthographic projection of the first film layer and the second color light emitting elements on the substrate partially overlaps; And / or, the orthographic projection of the first film layer and the third color light emitting elements on the substrate partially overlaps; The light emitting colors of the first color light emitting elements, the second color light emitting elements, and the third color light emitting elements are different.

6. The display panel of claim 5, wherein, The orthographic projection of the first film layer on the substrate at least partially overlaps the edge region of the first color light emitting elements, The orthographic projection of the first film layer on the substrate covers the orthographic projection of the second color light emitting elements and the third color light emitting elements on the substrate.

7. The display panel of claim 5, wherein, The orthographic projection of the first film layer on the substrate at least partially overlaps the edge region of the first color light emitting elements, The orthographic projection of the first film layer on the substrate at least partially overlaps the middle region of the second color light emitting elements, The orthographic projection of the first film layer on the substrate covers the orthographic projection of the third color light emitting elements on the substrate.

8. The display panel of any of claims 6-7, wherein, The light emitting color of the first color light emitting elements includes red, green, or blue; The light emitting color of the second color light emitting elements includes red, green, or blue; The light emitting color of the third color light emitting elements includes red, green, or blue.

9. The display panel of claim 1, wherein, The color film layer further includes a black matrix located between the first film layer and the color resist layer, The orthographic projection of the first film layer and the black matrix on the substrate at least partially overlaps; Or, the black matrix and the first film layer are located in the same layer, The first film layer and the black matrix do not overlap in orthographic projection on the substrate; The black matrix has a plurality of openings, and orthographic projection of the light emitting element on the substrate is located in the orthographic projection area of the openings on the substrate.

10. The display panel of claim 9, wherein, Further comprising a protective layer between the black matrix and the second film layer, The first film layer is multiplexed as the protective layer.

11. The display panel of claim 9, wherein, Further comprising a touch layer between the light emitting element and the first film layer, The touch layer comprises a first electrode layer, an insulating layer and a second electrode layer, the first electrode layer, the insulating layer and the second electrode layer are sequentially stacked in the direction away from the substrate, The orthographic projection of the first electrode layer and the second electrode layer on the substrate is located in the orthographic projection area of the black matrix on the substrate, The second film layer is multiplexed as the insulating layer.

12. The display panel of claim 9, wherein, Further comprising a touch layer between the black matrix and the second film layer, The touch layer comprises a first electrode layer, an insulating layer and a second electrode layer, the first electrode layer, the insulating layer and the second electrode layer are sequentially stacked in the direction away from the substrate, The orthographic projection of the first electrode layer and the second electrode layer on the substrate is located in the orthographic projection area of the black matrix on the substrate, The first film layer is multiplexed as the insulating layer.

13. The display panel of claim 1, wherein, The refractive index of the first film layer ranges from 1.4 to 1.5; The refractive index of the second film layer ranges from 1.7 to 1.85; The refractive index of the color resistance layer ranges from 1.5 to 1.

75.

14. The display panel of claim 1, wherein, The outer contour shape of the orthographic projection of the first film layer on the substrate is the same as the outer contour shape of the orthographic projection of the light emitting element on the substrate.

15. A display device, wherein, The display panel comprises the display panel of any one of claims 1-14. The display panel comprises the display panel of any one of claims 1-14.

Images