Display panel and display device

Abstract

The application discloses a display panel and a display device. The display panel comprises an array substrate, a display layer and a filter layer. The display layer comprises first light-emitting units and second light-emitting units with different light-emitting colors. With the increase of the viewing angle, the light-emitting units emit light with a brightness attenuation rate smaller than that of the second light-emitting units. The filter layer is arranged on the side of the display layer away from the array substrate. The filter layer comprises an adjusting part. The adjusting part is used for reducing the light-emitting rate of the first light-emitting units at a wide viewing angle and / or for increasing the light-emitting rate of the second light-emitting units at a wide viewing angle. The application can improve the attenuation degree of the first light-emitting units at a wide viewing angle and / or reduce the attenuation degree of the second light-emitting units at a wide viewing angle, thereby reducing the large-viewing-angle color deviation of the display panel.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of display, and particularly relates to a display panel and a display device. BACKGROUND

[0002] Organic light emitting diode (OLED) as a current light emitting device, because it has self-luminous, fast response, wide viewing angle and can be made on flexible substrate, etc. It is widely used in mobile phones, tablet computers and other display devices.

[0003] In an ideal state, the luminance of light emitting areas of different colors decreases with the increase of the viewing angle at the same degree, so as not to produce color deviation. However, due to the different degrees of attenuation of the luminance of light emitting areas of different colors with the increase of the viewing angle, color deviation phenomenon occurs when observed at a large viewing angle. SUMMARY

[0004] The present application aims to provide a display panel and a display device, which aims to solve the problem that the existing display panel is prone to color deviation phenomenon when observed at a large viewing angle.

[0005] The first aspect of the present application provides a display panel, comprising an array substrate, a display layer and a filter layer, the display layer comprising first and second light emitting units with different light emitting colors, the luminance attenuation rate of light emitted by the first light emitting unit being smaller than that of light emitted by the second light emitting unit as the viewing angle increases; the filter layer is arranged on the side of the display layer away from the array substrate, and the filter layer comprises an adjusting part for reducing the light output rate of the first light emitting unit at a wide viewing angle; and / or for increasing the light output rate of the second light emitting unit at a wide viewing angle.

[0006] The second aspect of the present application provides a display device comprising the above display panel.

[0007] Compared with the prior art, the display panel provided by the present application has a smaller luminance attenuation rate of light emitted by the first light emitting unit than that of light emitted by the second light emitting unit as the viewing angle increases. Since the filter layer is provided with an adjusting part for reducing the light output rate of the first light emitting unit at a wide viewing angle and / or for increasing the light output rate of the second light emitting unit at a wide viewing angle, the attenuation degree of the first light emitting unit at a large viewing angle can be improved. The present application can reduce the attenuation degree of the second light emitting unit at a large viewing angle, thereby reducing the large viewing angle color deviation phenomenon of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0009] Figure 1 A schematic diagram of a film layer structure of a display panel provided by the embodiments of the present application is shown in FIG. 2.

[0010] Figure 2 A schematic diagram of another film layer structure of a display panel provided by the embodiments of the present application is shown in FIG. 3.

[0011] Figure 3 A schematic diagram of still another film layer structure of a display panel provided by the embodiments of the present application is shown in FIG. 4.

[0012] Figure 4 A schematic diagram of still another film layer structure of a display panel provided by the embodiments of the present application is shown in FIG. 5.

[0013] Figure 5 A schematic diagram of a structure of a first color resist unit provided by the embodiments of the present application is shown in FIG. 6.

[0014] Figure 6 A schematic diagram of a structure of a second color resist unit provided by the embodiments of the present application is shown in FIG. 7.

[0015] Figure 7 A schematic diagram of still another film layer structure of a display panel provided by the embodiments of the present application is shown in FIG. 8.

[0016] Figure 8 A schematic diagram of still another film layer structure of a display panel provided by the embodiments of the present application is shown in FIG. 9.

[0017] Figure 9 A schematic diagram of still another film layer structure of a display panel provided by the embodiments of the present application is shown in FIG. 10.

[0018] Figure 10 A schematic diagram of still another film layer structure of a display panel provided by the embodiments of the present application is shown in FIG. 11.

[0019] Figure 11 A schematic diagram of still another film layer structure of a display panel provided by the embodiments of the present application is shown in FIG. 12.

[0020] Figure 12 A schematic diagram of still another film layer structure of a display panel provided by the embodiments of the present application is shown in FIG. 13.

[0021] The reference signs are as follows:

[0022] Display panel 100; light-emitting side 100a; backlight side 100b; array substrate 10; substrate 11; array layer 12; display layer 20; first light-emitting unit 20a; second light-emitting unit 20b; anode 21; light-emitting layer 22; cathode 23; pixel definition layer 24; first pixel opening 241; second pixel opening 242; filter layer 30; adjustment section 31; first adjustment subsection 311; second adjustment subsection 312; third adjustment subsection 313; fourth adjustment subsection 314; first color resist unit 32; first color resist area 321; second color resist... Region 322; First color resist portion 323; First doped particle 324; Second color resist unit 33; Third color resist region 331; Fourth color resist region 332; First slope 333; Recess 334; Second color resist portion 334; Second doped particle 335; Black matrix 34; Color resist layer 35; Planarization layer 36; First flat region 361; Second flat region 362; Second slope 363; Insulating layer 37; Encapsulation layer 40; Inorganic encapsulation layer 41; Organic encapsulation layer 42; Protrusion 50; First sub-protrusion 51; Second sub-protrusion 52; Touch metal layer 60. Detailed Implementation

[0023] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0024] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0025] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0026] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] The first aspect of this application provides a display panel. Figure 1 This is a schematic diagram of a film structure of a display panel provided in an embodiment of this application; Figure 2 This is a schematic diagram of another film layer structure for the display panel provided in an embodiment of this application. Please refer to the attached diagram. Figure 1 and Figure 2 The display panel 100 includes an array substrate 10, a display layer 20, and a filter layer 30. The array substrate 10 includes a substrate 11 and an array layer 12. The substrate 11 can be a flexible substrate made of materials such as polyimide (PI) or polyethylene terephthalate (PET) to allow the non-display area of ​​the display panel 100 to be bent. The array layer 12 contains a driving circuit for controlling the light emission of the display layer 20. The array layer 12 is generally composed of inorganic film layers such as a metal layer, a semiconductor layer (active layer), and an insulating layer 37. By patterning these inorganic film layers, a driving circuit for controlling the light emission of the display layer 20 can be formed. There are various ways to implement the specific circuit structure, which will not be described in detail here.

[0028] The display layer 20 includes first light-emitting units 20a and second light-emitting units 20b with different emitting colors. Specifically, the display layer 20 includes an anode 21, a light-emitting layer 22 located on the anode 21, and a cathode 23 located on the light-emitting layer 22. The light-emitting layer 22 includes a plurality of spaced-apart first light-emitting units 20a and a plurality of spaced-apart second light-emitting units 20b, with the first light-emitting units 20a and second light-emitting units 20b arranged alternately. By applying a positive voltage to the anode 21 and a negative voltage to the cathode 23, holes generated by the anode 21 are injected into the light-emitting layer 22, and electrons generated by the cathode 23 are injected into the light-emitting layer 22. The electrons and holes injected into the light-emitting layer 22 recombine and excite the light-emitting molecules in the light-emitting layer 22. The excited light-emitting molecules undergo radiative transitions, causing the corresponding first light-emitting units 20a and second light-emitting units 20b to emit light. The anode 21 is typically made of a material with a high work function to improve hole injection efficiency. It can be gold (Au), platinum (Pt), titanium (Ti), silver (Ag), indium tin oxide (ITO), zinc tin oxide (IZO), or a transparent conductive polymer (such as polyaniline). The cathode 23 is typically made of a material with a low work function to facilitate electron injection and also to reduce heat generated during operation, thus extending the lifespan of the OLED device. The cathode 23 can be one of the following metals: silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca), or indium (In). It can also be an alloy of the aforementioned metals, such as magnesium-silver alloy (Mg / Ag) or lithium-aluminum alloy (Li / Al). This embodiment does not impose any limitations on this.

[0029] Because the light-emitting unit has an optical microcavity, the emitted light wavelength follows the microcavity effect, i.e., mλ = 2ndcosθ (where m is an integer, λ is the wavelength, n is the refractive index of the microcavity, d is the microcavity length, and θ is the angle). For example, the peak wavelength of the emitted light from the first light-emitting unit 20a at a wide viewing angle is smaller than that at a normal viewing angle. Similarly, the peak wavelength and intensity of the emitted light from the second light-emitting unit 20b at a wide viewing angle are both reduced compared to the normal viewing angle. Due to the difference in characteristics between the first light-emitting unit 20a and the second light-emitting unit 20b, i.e., when the viewing angle changes by the same amount, the peak wavelength and intensity of emitted light of different colors change to different degrees, resulting in color matching at different viewing angles that differs from that at the normal viewing angle. This manifests as an aggravated color shift in white light as the viewing angle changes. When the display panel 100 emits white light at a normal viewing angle, color shift will be observed at wide viewing angles.

[0030] As the viewing angle increases, the brightness decay rate of the light emitted by the first light-emitting unit 20a is less than that of the light emitted by the second light-emitting unit 20b. In other words, at a wide viewing angle, the decay rate of the first light-emitting unit 20a is smaller, while that of the second light-emitting unit 20b is larger. This results in the first light-emitting unit 20a having higher brightness and the second light-emitting unit 20b having relatively lower brightness. Consequently, for white light emitted at a normal viewing angle, the user perceives a greater intensity of light emitted by the first light-emitting unit 20a than light emitted by the second light-emitting unit 20b at the same wide viewing angle. In other words, a white image appears more distorted by the color emitted by the first light-emitting unit 20a at a wide viewing angle.

[0031] In this embodiment, the filter layer 30 is disposed on the side of the display layer 20 facing away from the array substrate 10. The filter layer 30 can reduce the ambient light illuminating the display panel 100. The filter layer 30 includes an adjustment section 31, which is used to reduce the light emission rate of the first light-emitting unit 20a over a wide viewing angle. It should be noted that "wide viewing angle" refers to a large viewing angle, that is, a side viewing angle that deviates significantly from the frontal viewing angle, such as 30° to 89°.

[0032] Because the adjustment unit 31 in this embodiment can reduce the light emission rate of the first light-emitting unit 20a over a wide viewing angle and / or increase the light emission rate of the second light-emitting unit 20b over a wide viewing angle, this embodiment can improve the attenuation degree of the first light-emitting unit 20a at a wide viewing angle, reduce the mixing ratio of the emitted light of the first light-emitting unit 20a at a wide viewing angle; and / or, can reduce the attenuation degree of the second light-emitting unit 20b at a wide viewing angle, increase the mixing ratio of the emitted light of the second light-emitting unit 20b at a wide viewing angle, thereby reducing the wide viewing angle color shift phenomenon of the display panel 100.

[0033] Optionally, the display panel 100 further includes an encapsulation layer 40 located on the side of the display layer 20 away from the substrate 11. A light filter layer 30 is disposed on the encapsulation layer 40, which covers the display layer 20 to protect it from moisture and oxygen corrosion. The encapsulation layer 40 can be a thin-film encapsulation layer 40, comprising an inorganic encapsulation layer 41, an organic encapsulation layer 42, and an inorganic encapsulation layer 43 stacked together to block moisture and oxygen.

[0034] In some embodiments, the filter layer 30 includes a first color resist unit 32, which is correspondingly disposed with the first light-emitting unit 20a in a direction perpendicular to the array substrate X. That is, in the direction perpendicular to the array substrate X, the orthographic projection of the first color resist unit 32 onto the array substrate 10 and the orthographic projection of the first light-emitting unit 20a onto the array substrate 10 at least partially overlap. The side of the display panel 100 that emits light is the light-emitting side 100a, and the side opposite to the light-emitting side 100a is the backlight side 100b. The first color resist unit 32 can allow the emitted light from the first light-emitting unit 20a to pass through and emit light onto the light-emitting side 100a of the display panel 100, and the first color resist unit 32 can filter ambient light.

[0035] Optionally, the first light-emitting unit 20a emits green light, and the second light-emitting unit 20b emits red or blue light. The attenuation rate of green light is less than that of blue or red light. Taking the first light-emitting unit 20a emitting green light and the second light-emitting unit 20b emitting red or blue light as an example, the first color resist unit 32 allows the green light emitted by the first light-emitting unit 20a to pass through, while red or blue light from the external environment cannot pass through the first color resist unit 32, resulting in a smaller amount of green light from the external environment entering the first light-emitting unit 20a.

[0036] The first color resist unit 32 includes a first color resist region 321 and a second color resist region 322 disposed circumferentially around the first color resist region 321. The first color resist region 321 and the first light-emitting unit 20a are disposed correspondingly in the direction X perpendicular to the array substrate. That is, in the direction X perpendicular to the array substrate, the orthographic projection of the first color resist region 321 on the array substrate 10 at least partially overlaps with the orthographic projection of the first light-emitting unit 20a.

[0037] The adjustment unit 31 is located in the second color blocking region 322, which can reduce the attenuation of the luminous brightness of the first light-emitting unit 20a at the positive viewing angle and ensure the luminous brightness at the positive viewing angle.

[0038] In some embodiments, the adjustment portion 31 is a protrusion 50 formed by the second color resist region 322 protruding along a direction X perpendicular to the array substrate; and in the direction X perpendicular to the array substrate, the thickness of the second color resist region 322 is greater than the thickness of the first color resist region 321. For example... Figure 1 As shown, the protrusion 50 can protrude toward the side opposite to the array substrate 10, or it can also be as shown in the diagram. Figure 2 As shown, it protrudes towards one side of the array substrate 10, which only needs to satisfy the condition of increasing the thickness of the second color resist region 322.

[0039] Since the thickness of the second color blocking region 322 is greater than the thickness of the first color blocking region 321, the optical path of the first light-emitting unit 20a through the first color blocking region 32 can be increased under a large viewing angle, thereby improving the attenuation degree of the first light-emitting unit 20a under a large viewing angle and reducing the amount of light emitted by the first light-emitting unit 20a under a large viewing angle.

[0040] In some embodiments, the display layer 20 has a first pixel opening 241, and the first light-emitting unit 20a is located within the first pixel opening 241. Specifically, the display layer 20 includes a pixel definition layer 24, which has the first pixel opening 241 along a direction X perpendicular to the array substrate. By providing the first pixel opening 241, interference between adjacent light-emitting devices can be reduced, thus ensuring the light-emitting effect.

[0041] Along the direction X perpendicular to the array substrate, the projection of the first color resistive region 321 is located within the first pixel opening 241, and the projection of the second color resistive region 322 is arranged circumferentially around the first pixel opening 241. That is, the orthogonal projection of the first color resistive region 321 onto the array substrate 10 falls within the first pixel opening 241, and the orthogonal projection of the second color resistive region 322 onto the array substrate 10 surrounds the orthogonal projection of the first pixel opening 241 onto the array substrate 10. The emitted light from the first light-emitting unit 20a can be emitted at a normal viewing angle through the first color resistive region 321, and the emitted light from the first light-emitting unit 20a can be emitted at a wide viewing angle through the second color resistive region 322. Therefore, this embodiment does not reduce the luminous brightness at a normal viewing angle.

[0042] Optionally, the area of ​​the orthographic projection of the first color resistive region 321 onto the array substrate 10 is equal to the area of ​​the orthographic projection of the first pixel opening 241 onto the array substrate 10, so as to further improve the luminous brightness of the first light-emitting unit 20a at a positive viewing angle. Optionally, the orthographic projection of the first color resistive region 321 onto the array substrate coincides with the orthographic projection of the first pixel opening 241 onto the array substrate.

[0043] Optionally, the first pixel opening 241 is set to gradually expand from the backlight side 100b of the display panel 100 towards the light-emitting side 100a, that is, the opening area gradually increases to improve the light extraction rate.

[0044] Figure 3 This is a schematic diagram of yet another film layer structure for a display panel provided in an embodiment of this application. For example... Figure 3As shown, in some embodiments, the filter layer 30 further includes a second color resist unit 33, which is correspondingly disposed with the second light-emitting unit 20b in a direction perpendicular to the array substrate X. That is, in the direction perpendicular to the array substrate X, the orthographic projection of the second color resist unit 33 onto the array substrate 10 and the orthographic projection of the second light-emitting unit 20b onto the array substrate 10 at least partially overlap. The second color resist unit 33 allows the emitted light from the second light-emitting unit 20b to pass through and emit light to the light-emitting side 100a of the display panel 100, and the second color resist unit 33 can filter ambient light. Taking the emitted color of the second light-emitting unit 20b as red or blue as an example, the second color resist unit 33 allows the red or blue light emitted by the second light-emitting unit 20b to pass through, while green light from the external environment cannot pass through the second color resist unit 33, and the amount of red or blue light from the external environment that enters the first light-emitting unit 20a is relatively small.

[0045] The second color resist unit 33 includes a third color resist region 331 and a fourth color resist region 332 disposed circumferentially around the third color resist region 331; the thickness of the fourth color resist region 332 is less than the thickness of the third color resist region 331 in the direction X perpendicular to the array substrate.

[0046] The fourth color resist region 332 can be recessed relative to the third color resist region 331 along a direction X perpendicular to the array substrate to form a recess 334, thereby reducing the thickness of the fourth color resist region 332. Specifically, the side of the fourth color resist region 332 facing away from the array substrate 10 can be recessed downwards; and / or, the side of the fourth color resist region 332 facing the array substrate 10 can be recessed upwards, as long as the condition for reducing the thickness of the fourth color resist region 332 is met.

[0047] Since the thickness of the fourth color blocking region 332 is smaller than that of the third color blocking region 331, the optical path of the second light-emitting unit 20b through the second color blocking unit 33 can be reduced at a wide viewing angle, thereby reducing the attenuation of the second light-emitting unit 20b at a wide viewing angle and increasing the light output of the second light-emitting unit 20b at a wide viewing angle.

[0048] Optionally, a black matrix 34 is provided between adjacent first color resist units 32 and second color resist units 33 of the filter layer 30, so that the first color resist unit 32 and the second color resist unit 33 are connected by the black matrix 34. By setting the black matrix 34, the entry of ambient light into the area between adjacent light-emitting units can be reduced or prevented, thereby improving display interference without affecting the light emission of the light-emitting units.

[0049] Optionally, the display layer 20 has a second pixel opening 242, and the second light-emitting unit 20b is located within the second pixel opening 242. Specifically, the display layer 20 includes a pixel definition layer 24, which has a second pixel opening 242 along a direction X perpendicular to the array substrate. By providing the second pixel opening 242, interference between adjacent first light-emitting units 20a and second light-emitting units 20b can be reduced, ensuring the light-emitting effect.

[0050] Along the direction X perpendicular to the array substrate, the projection of the third color resistive region 331 is located within the second pixel opening 242, and the projection of the fourth color resistive region 332 is arranged circumferentially around the second pixel opening 242. That is, the orthogonal projection of the third color resistive region 331 onto the array substrate 10 falls within the second pixel opening 242, and the orthogonal projection of the fourth color resistive region 332 onto the array substrate 10 surrounds the orthogonal projection of the second pixel opening 242 onto the array substrate 10. The emitted light from the second light-emitting unit 20b can be emitted at a normal viewing angle through the third color resistive region 331, and the emitted light from the second light-emitting unit 20b can be emitted at a wide viewing angle through the fourth color resistive region 332. Therefore, this embodiment does not reduce the luminous brightness at a normal viewing angle.

[0051] Optionally, the area of ​​the orthogonal projection of the third color blocking region 331 onto the array substrate 10 is equal to the area of ​​the orthogonal projection of the second pixel opening 242 onto the array substrate 10, so as to further improve the luminous brightness of the second light-emitting unit 20b at the orthogonal viewing angle.

[0052] Optionally, the second pixel opening 242 is gradually widened from the backlight side 100b of the display panel 100 to the light-emitting side 100a, that is, the opening area gradually increases to improve the light extraction rate.

[0053] Figure 4 This is a schematic diagram of another film layer structure of a display panel provided in an embodiment of this application. In some embodiments, such as Figure 4 As shown, the fourth color blocking region 332 has a first inclined surface 333 connected to the third color blocking region 331 on the side opposite to the display layer 20. The first inclined surface 333 is a curved inclined surface protruding to the side opposite to the display layer 20. The protruding curved part forms a prism structure, which can be used to scatter light, increase the light output of the second light-emitting unit 20b at a wide viewing angle, and reduce the color shift phenomenon at a wide viewing angle.

[0054] In some embodiments, the first light-emitting unit 20a emits green light, and the second light-emitting unit 20b emits blue or red light. The first light-emitting unit 20a is a green light-emitting unit that emits green light, and the second light-emitting unit 20b is a blue light-emitting unit that emits blue light or a red light-emitting unit that emits red light. For the three primary colors of light, the display panel 100 includes a plurality of pixel units arranged at intervals, and each pixel unit includes a green light-emitting unit, a red light-emitting unit, and a blue light-emitting unit arranged in an array. Since the materials of the green light-emitting unit in this embodiment are different from those of the blue and red light-emitting units, the green light-emitting unit has the slowest brightness decay rate as the viewing angle increases. If the adjustment unit 31 is not provided, the display panel 100 will display a greenish tint at large viewing angles.

[0055] Since the adjustment unit 31 in this embodiment can reduce the light emission rate of the green light-emitting unit over a wide viewing angle, it can increase the attenuation of the green light-emitting unit under a wide viewing angle and reduce the mixing ratio of the emitted light of the green light-emitting unit under a wide viewing angle, thereby reducing the green tint phenomenon of the display panel 100 under a wide viewing angle.

[0056] Figure 5 This is a schematic diagram of the structure of the first color resist unit provided in an embodiment of this application. Figure 6 This is a schematic diagram of the structure of the second color resist unit provided in an embodiment of this application. In some embodiments, such as Figure 5 As shown, the maximum thickness difference between the second color resist region 322 and the first color resist region 321 is D1. Figure 6 As shown, the maximum thickness difference between the fourth color resist region 332 and the third color resist region 331 is D2, and D1 is greater than D2.

[0057] It should be noted that "the maximum thickness difference between the second color resistive region 322 and the first color resistive region 321" refers to the difference between the maximum thickness of the second color resistive region 322 along the direction X perpendicular to the array substrate and the minimum thickness of the first color resistive region 321 along the direction X perpendicular to the array substrate; "the maximum thickness difference between the fourth color resistive region 332 and the third color resistive region 331" refers to the difference between the maximum thickness of the third color resistive region 331 along the direction X perpendicular to the array substrate and the minimum thickness of the fourth color resistive region 332 along the direction X perpendicular to the array substrate.

[0058] In the above embodiment, D1 is greater than D2, that is, the optical path difference between the large viewing angle and the normal viewing angle of the first light-emitting unit 20a is greater than the optical path difference between the large viewing angle and the normal viewing angle of the second light-emitting unit 20b, and the degree of brightness attenuation adjustment of the first light-emitting unit 20a under the large viewing angle is greater than the degree of brightness attenuation adjustment of the second light-emitting unit 20b under the large viewing angle, further alleviating the color shift phenomenon of the display panel under the 100-degree large viewing angle.

[0059] Figure 7This is a schematic diagram of another film layer structure for a display panel provided in an embodiment of this application. In other embodiments, such as... Figure 7 As shown, the filter layer 30 includes a color resist layer 35 and a planarization layer 36 disposed on the color resist layer 35. The color resist layer 35 is located between the display layer 20 and the planarization layer 36, and the planarization layer 36 is used to planarize the surface of the color resist layer 35.

[0060] Along the direction X perpendicular to the array substrate, the planarization layer 36, corresponding to the second light-emitting unit 20b, includes a first planarization region 361 and a second planarization region 362. The second planarization region 362 is arranged circumferentially around the first planarization region 361, and the adjustment part 31 is located in the second planarization region 362. The adjustment part 31 can be omitted from the color resist layer 35, but can be provided in the second planarization region 362. The orthographic projection of the first planarization region 361 onto the array substrate 10 at least partially overlaps with the orthographic projection of the second light-emitting unit 20b onto the array substrate 10, while the orthographic projection of the second planarization region 362 onto the array substrate 10 does not overlap with the orthographic projection of the second light-emitting unit 20b onto the array substrate 10. Because the second planarization region 362 is provided with the adjustment part 31, the light emission rate of the second light-emitting unit 20b over a wide viewing angle can be improved. Therefore, the light emission rate of the second light-emitting unit 20b over a wide viewing angle can be improved, thereby increasing the mixing ratio of the emitted light from the second light-emitting unit 20b at a wide viewing angle and improving the color shift phenomenon of the display panel 100 at a wide viewing angle.

[0061] In some embodiments, the adjustment portion 31 is a protrusion 50 protruding from the second flat region 362 relative to the first flat region 361 in a direction perpendicular to the array substrate X. A second inclined surface 363 connected to the second flat region 362 is formed on the side of the protrusion 50 facing away from the color resist layer 35. The second inclined surface 363 is a curved inclined surface protruding towards the side facing away from the color resist layer 35. The protruding curved portion forms a prism structure, which can be used to scatter light, thereby increasing the light output of the second light-emitting unit 20b over a wide viewing angle and reducing color shift phenomena over a wide viewing angle.

[0062] Figure 8 This is a schematic diagram of another film layer structure for a display panel provided in an embodiment of this application. In other embodiments, such as... Figure 8As shown, the adjustment section 31 includes a first adjustment sub-section 311 and a second adjustment sub-section 312. The first adjustment sub-section 311 is a first sub-protrusion 51 formed by the second color resist region 322 protruding along a direction X perpendicular to the array substrate; and the thickness of the second color resist region 322 is greater than the thickness of the first color resist region 321 along the direction X perpendicular to the array substrate. The second adjustment sub-section 312 is a second sub-protrusion 52 protruding from the second flat region 362 relative to the first flat region 361 along a direction X perpendicular to the array substrate. A second inclined surface 363 connected to the second flat region 362 is formed on the side of the second sub-protrusion 52 facing away from the color resist layer 35. The second inclined surface 363 is a curved inclined surface protruding towards the side facing away from the color resist layer 35. This embodiment can simultaneously reduce the light emission rate of the first light-emitting unit 20a over a wide viewing angle and increase the light emission rate of the second light-emitting unit 20b over a wide viewing angle. Through the cooperation of the first adjustment sub-section 311 and the second adjustment sub-section 312, the color shift phenomenon of the display panel 100 at a wide viewing angle is improved.

[0063] Figure 9 This is a schematic diagram of another film layer structure for a display panel provided in an embodiment of this application. In other embodiments, such as... Figure 9 As shown, the filter layer 30 includes a color resist layer 35 and an insulating layer 37. The display panel 100 also includes a touch metal layer 60 disposed on the side of the display layer 20 facing away from the array substrate 10. The insulating layer 37 is disposed between the touch metal layer 60 and the color resist layer 35. The color resist layer 35 includes a first color resist unit 32, which is correspondingly disposed with the first light-emitting unit 20a in a direction X perpendicular to the array substrate. That is, the orthographic projection of the first color resist unit 32 onto the array substrate 10 and the orthographic projection of the first light-emitting unit 20a onto the array substrate 10 at least partially overlap.

[0064] The first color resist unit 32 and the insulating layer 37 form the adjustment section 31. The first color resist unit 32 includes a first color resist portion 323 and first doped particles 324 doped in the first color resist portion 323. The refractive index of the first doped particles 324 is less than that of the first color resist portion 323. The insulating layer 37 is made of an inorganic material with a high refractive index, silicon nitride, and its refractive index is greater than that of the first color resist portion 323. When light enters a medium with a higher refractive index from a medium with a lower refractive index, if the angle of incidence is greater than a certain critical angle, the refracted light will disappear, and all incident light will be reflected and will not enter the medium with a lower refractive index.

[0065] The first doped particle 324 can be a low-refractive-index silicon oxide nanoparticle. Since the first color resist portion 323 is doped with the first doped particle 324, the refractive index of the first color resist unit 32 is reduced. Therefore, the refractive index difference between the insulating layer 37 and the first color resist portion 323 increases, and the critical angle for total internal reflection of the emitted light of the first light-emitting unit 20a at the interface between the first color resist portion 323 and the insulating layer 37 becomes smaller, making total internal reflection easier to occur. This increases the reflectivity of the first light-emitting unit 20a at the interface between the first color resist portion 323 and the insulating layer 37, reduces the luminous brightness of the first light-emitting unit 20a at a large viewing angle, and improves the color shift phenomenon of the display panel at a large viewing angle of 100°.

[0066] Optionally, the orthographic projection of the first light-emitting unit 20a onto the array substrate 10 falls within the orthographic projection range of the first color resist portion 323 onto the array substrate 10, and the orthographic projection area of ​​the first light-emitting unit 20a onto the array substrate 10 is smaller than the orthographic projection area of ​​the first color resist portion 323 onto the array substrate 10, which can further improve the reflectivity of the large-angle emitted light of the first light-emitting unit 20a at the interface between the first color resist portion 323 and the insulating layer 37.

[0067] Figure 10 This is a schematic diagram of another film layer structure of a display panel provided in an embodiment of this application. In a further embodiment, such as Figure 10 As shown, the color resist layer 35 also includes a second color resist unit 33, which is disposed correspondingly to the second light-emitting unit 20b in a direction X perpendicular to the array substrate. That is, the orthographic projection of the second color resist unit 33 onto the array substrate 10 and the orthographic projection of the second light-emitting unit 20b onto the array substrate 10 at least partially overlap. The second color resist unit 33 and the insulating layer 37 form an adjustment portion 31. Specifically, the adjustment portion 31 includes a third adjustment sub-portion 313 and a fourth adjustment sub-portion 314. The portion of the insulating layer 37 perpendicular to the array substrate that corresponds to the first color resist unit 323 forms the third adjustment sub-portion 313 with the first color resist unit 323; the portion of the insulating layer 37 perpendicular to the array substrate that corresponds to the second color resist unit 334 forms the fourth adjustment sub-portion 314 with the second color resist unit 334.

[0068] It should be noted that: "The portion of the insulating layer 37 that corresponds to the first color resist 323 along the direction X perpendicular to the array substrate" refers to the portion where the orthographic projection of the insulating layer 37 on the array substrate 10 overlaps with the orthographic projection of the first color resist 323 on the array substrate 10. "The portion of the insulating layer 37 that corresponds to the second color resist 334 along the direction X perpendicular to the array substrate" refers to the portion where the orthographic projection of the insulating layer 37 on the array substrate 10 overlaps with the orthographic projection of the second color resist 334 on the array substrate 10.

[0069] The second color resist unit 33 includes a second color resist portion 334 and second doped particles 335 doped in the second color resist portion 334. The refractive index of the second doped particles 335 is greater than that of the second color resist portion 334. The insulating layer 37 is prepared using an inorganic material with a high refractive index, silicon nitride, and the refractive index of the insulating layer 37 is greater than that of the second color resist portion 334. The second doped particle 335 can be a high-refractive-index zirconium oxide or titanium oxide nanoparticle. Since the second color resist part 334 is doped with the second doped particle 335, the refractive index of the second color resist unit 33 is increased. The refractive index difference between the insulating layer 37 and the second color resist part 334 increases. The critical angle for total internal reflection of the emitted light of the second light-emitting unit 20b at the interface between the second color resist part 334 and the insulating layer 37 becomes larger, making it less likely for total internal reflection to occur. This reduces the reflectivity of the second light-emitting unit 20b at the interface between the second color resist part 334 and the insulating layer 37, improves the luminous brightness of the second light-emitting unit 20b at a wide viewing angle, and improves the color shift phenomenon of the display panel at a wide viewing angle of 100°.

[0070] Optionally, the orthographic projection of the second light-emitting unit 20b onto the array substrate 10 falls within the orthographic projection range of the second color resist portion 334 onto the array substrate 10, and the orthographic projection area of ​​the second light-emitting unit 20b onto the array substrate 10 is smaller than the orthographic projection area of ​​the second color resist portion 334 onto the array substrate 10, which can further reduce the reflectivity of the large-angle emitted light of the second light-emitting unit 20b at the interface between the second color resist portion 334 and the insulating layer 37.

[0071] In some embodiments, the refractive index difference between the first color resist unit 32 and the insulating layer 37 is greater than the refractive index difference between the second color resist unit 33 and the insulating layer 37. The increase in total internal reflection at a wide viewing angle of the first light-emitting unit 20a is greater than the decrease in total internal reflection at a wide viewing angle of the second light-emitting unit 20b. As a result, the adjustment degree of brightness attenuation of the first light-emitting unit 20a at a wide viewing angle is greater than the adjustment degree of brightness attenuation of the second light-emitting unit 20b at a wide viewing angle, further alleviating the color shift phenomenon of the display panel at a wide viewing angle of 100.

[0072] Figure 11 This is a schematic diagram of another film layer structure for a display panel provided in an embodiment of this application. In other embodiments, such as... Figure 11 As shown, the first doped particle 324 is not doped in the first color resist 323, and the second doped particle 335 is doped only in the second color resist 334. The luminous brightness of the first light-emitting unit 20a remains unchanged at a wide viewing angle, and the luminous brightness of the second light-emitting unit 20b at a wide viewing angle is increased, which can also improve the color shift phenomenon of the display panel 100 at a wide viewing angle.

[0073] Figure 12 This is a schematic diagram of another film layer structure of a display panel provided in an embodiment of this application. In yet other embodiments, such asFigure 12 As shown, the adjustment section 31 includes a first adjustment sub-section 311 and a third adjustment sub-section 313. The first adjustment sub-section 311 is a first sub-protrusion 51 formed by the second color resist region 322 protruding along a direction X perpendicular to the array substrate; and along the direction X perpendicular to the array substrate, the thickness of the second color resist region 322 is greater than the thickness of the first color resist region 321. The third adjustment sub-section 313 is formed by the portion of the insulating layer 37 corresponding to the first color resist region 323 along a direction X perpendicular to the array substrate and the first color resist region 323. The first color resist unit 32 includes the first color resist region 323 and a first doped particle 324 doped in the first color resist region 323. The refractive index of the first doped particle 324 is less than the refractive index of the first color resist region 323. The insulating layer 37 is made of an inorganic material with a high refractive index of silicon nitride, and the refractive index of the insulating layer 37 is greater than the refractive index of the first color resist region 323. In this embodiment, the first adjustment sub-section 311 and the third adjustment sub-section 313 can simultaneously reduce the light emission rate of the first light-emitting unit 20a over a wide viewing angle, thereby improving the color shift phenomenon of the display panel over a wide viewing angle.

[0074] Of course, in other embodiments, the adjustment unit 31 can be set according to the specific situation. The first adjustment sub-unit 311, the second adjustment sub-unit 312, the third adjustment sub-unit 313 and the fourth adjustment sub-unit 314 can be arbitrarily selected. That is, the composition of the adjustment unit 31 can be implemented in a variety of ways, as long as it can meet the condition of improving the color shift phenomenon of the display panel with a 100-degree wide viewing angle. It will not be elaborated here.

[0075] A second aspect of this application provides a display device including the aforementioned display panel 100. Since this display device employs all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated upon further here. For example, the display device may be an electronic device such as a mobile phone, computer, smart wearable device (e.g., smartwatch), and in-vehicle display device; this application does not limit this to such devices.

[0076] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display panel, characterized in that, include: Array substrate, The display layer includes a first light-emitting unit and a second light-emitting unit with different light-emitting colors. As the viewing angle increases, the brightness decay rate of the light emitted by the first light-emitting unit is less than that of the light emitted by the second light-emitting unit. A filter layer is disposed on the side of the display layer opposite to the array substrate. The filter layer includes an adjustment section for reducing the light extraction efficiency of the first light-emitting unit over a wide viewing angle and / or for increasing the light extraction efficiency of the second light-emitting unit over a wide viewing angle. The adjustment section includes a third adjustment subsection. The filter layer includes a color resist layer and an insulating layer. The display panel further includes a touch metal layer disposed on the side of the display layer opposite to the array substrate. The insulating layer is disposed between the touch metal layer and the color resist layer. The color resist layer includes a first color resist unit, which is disposed corresponding to the first light-emitting unit in a direction perpendicular to the array substrate. The first color resist unit and the insulating layer form the third adjustment sub-section. The first color resist unit includes a first color resist portion and a first doped particle doped in the first color resist portion. The refractive index of the first doped particle is less than the refractive index of the first color resist portion.

2. The display panel according to claim 1, characterized in that, The adjustment unit further includes a first adjustment sub-unit. The first color resist unit includes a first color resist area and a second color resist area arranged circumferentially around the first color resist area. The first adjustment sub-unit is located in the second color resist area.

3. The display panel according to claim 2, characterized in that, The first adjustment sub-part is a protrusion formed by the second color resist region protruding in a direction perpendicular to the array substrate; and in the direction perpendicular to the array substrate, the thickness of the second color resist region is greater than the thickness of the first color resist region.

4. The display panel according to claim 3, characterized in that, The display layer has a first pixel opening, and the first light-emitting unit is located inside the first pixel opening; Along a direction perpendicular to the array substrate, the projection of the first color resist region is located within the first pixel opening, and the projection of the second color resist region is arranged circumferentially around the first pixel opening.

5. The display panel according to claim 3, characterized in that, The filter layer further includes a second color resist unit, which is disposed correspondingly to the second light-emitting unit in a direction perpendicular to the array substrate. The second color resist unit includes a third color resist region and a fourth color resist region disposed circumferentially around the third color resist region. In the direction perpendicular to the array substrate, the thickness of the fourth color resist region is less than the thickness of the third color resist region.

6. The display panel according to claim 5, characterized in that, The fourth color blocking region has a first inclined surface connected to the third color blocking region on the side away from the display layer. The first inclined surface is a curved inclined surface that protrudes to the side away from the display layer.

7. The display panel according to claim 5, characterized in that, The first light-emitting unit emits green light, and the second light-emitting unit emits blue or red light.

8. The display panel according to claim 7, characterized in that, The maximum thickness difference between the second color resist area and the first color resist area is D1, and the maximum thickness difference between the fourth color resist area and the third color resist area is D2, where D1 is greater than D2.

9. The display panel according to claim 1, characterized in that, The filter layer further includes a planarization layer disposed on the color resist layer, the color resist layer being located between the display layer and the planarization layer; in a direction perpendicular to the array substrate, the portion of the planarization layer corresponding to the second light-emitting unit includes a first planarization region and a second planarization region, the second planarization region being disposed circumferentially around the first planarization region, and the adjustment portion being located in the second planarization region.

10. The display panel according to claim 9, characterized in that, The adjustment section further includes a second adjustment subsection, which is a protrusion protruding from the second flat region relative to the first flat region in a direction perpendicular to the array substrate. The side of the protrusion away from the color resist layer has a second inclined surface connected to the second flat region. The second inclined surface is a curved inclined surface protruding towards the side away from the color resist layer.

11. The display panel according to claim 1, characterized in that, The color resist layer further includes a second color resist unit, which is disposed correspondingly to the second light-emitting unit in a direction perpendicular to the array substrate; the second color resist unit and the insulating layer form the adjustment part, and the second color resist unit includes a second color resist part and a second doped particle doped in the second color resist part, wherein the refractive index of the second doped particle is greater than the refractive index of the second color resist part.

12. The display panel according to claim 11, characterized in that, The refractive index difference between the first color resist unit and the insulating layer is greater than the refractive index difference between the second color resist unit and the insulating layer.

13. A display device, characterized in that, Includes the display panel according to any one of claims 1 to 12.

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