CN116234389A - Display panel and display device - Google Patents

Abstract

The application discloses a display panel and a display device. The display device comprises an array substrate, a display layer and a filter layer, wherein the display layer comprises a first light-emitting unit and a second light-emitting unit which have different light-emitting colors, and the brightness decay rate of light rays emitted by the first light-emitting unit is smaller than that of light rays emitted by the second light-emitting unit along with the increase of a visual angle; the optical filter layer is arranged on one side of the display layer, which is away from the array substrate, and comprises an adjusting part, wherein the adjusting part is used for reducing the light-emitting rate of the first light-emitting unit in a wide view angle; and/or for improving the light-emitting efficiency of the second light-emitting unit at a wide viewing angle. According to the method and the device, the attenuation degree of the first light-emitting unit under the large visual angle can be improved, and/or the attenuation degree of the second light-emitting unit under the large visual angle can be reduced, so that the phenomenon of large visual character deviation of the display panel is reduced.

Description

Display panel and display device

Technical Field

The application belongs to the technical field of display, and particularly relates to a display panel and a display device.

Background

An Organic Light Emitting Diode (OLED) is used as a current-type light emitting device, and is widely used in display devices such as mobile phones and tablet computers because of its characteristics of self-luminescence, fast response, wide viewing angle, and being able to be fabricated on flexible substrates.

In an ideal state, the light-emitting brightness of the light-emitting areas with different colors has the same degree of attenuation along with the increase of the viewing angle, so that the color deviation is not generated. However, since the light emission luminance of the light emission regions of different colors is attenuated to different degrees with an increase in viewing angle, a color shift phenomenon occurs when viewed at a large viewing angle.

Disclosure of Invention

The purpose of the present application is to provide a display panel and a display device, which aim to solve the problem that the existing display panel is easy to generate color cast phenomenon when observed under a large viewing angle.

The first aspect of the present application provides a display panel, including an array substrate, a display layer and a filter layer, where the display layer includes a first light emitting unit and a second light emitting unit with different light emitting colors, and as a viewing angle increases, a luminance decay rate of light emitted by the first light emitting unit is smaller than a luminance decay rate of light emitted by the second light emitting unit; the optical filter layer is arranged on one side of the display layer, which is away from the array substrate, and comprises an adjusting part, wherein the adjusting part is used for reducing the light-emitting rate of the first light-emitting unit in a wide view angle; and/or for improving the light-emitting efficiency of the second light-emitting unit at a wide viewing angle.

A second aspect of the present application provides a display device, including the above display panel.

Compared with the prior art, the display panel provided by the embodiment of the application increases along with the viewing angle, and the brightness decay rate of the light rays emitted by the first light-emitting unit is smaller than that of the light rays emitted by the second light-emitting unit. According to the embodiment of the application, the attenuation degree of the second light-emitting unit under a large visual angle can be reduced, so that the phenomenon of large visual character deviation of the display panel is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a film structure of a display panel according to an embodiment of the present application;

fig. 2 is a schematic diagram of another film structure of the display panel according to the embodiment of the present application;

fig. 3 is a schematic view of a film structure of a display panel according to an embodiment of the present disclosure;

fig. 4 is a schematic view of another film structure of the display panel according to the embodiment of the present application;

fig. 5 is a schematic structural diagram of a first color resistance unit according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a second color resist unit according to an embodiment of the present disclosure;

fig. 7 is a schematic view of another film structure of the display panel according to the embodiment of the present application;

fig. 8 is a schematic view of another film structure of the display panel according to the embodiment of the present application;

fig. 9 is a schematic view of another film structure of the display panel according to the embodiment of the present application;

fig. 10 is a schematic view of another film structure of the display panel according to the embodiment of the present application;

fig. 11 is a schematic view of another film structure of the display panel according to the embodiment of the present application;

fig. 12 is a schematic view of another film structure of the display panel according to the embodiment of the present application.

The reference numerals are as follows:

a display panel 100; a light-emitting side 100a; a backlight side 100b; an array substrate 10; a substrate 11; an array layer 12; a display layer 20; a first light emitting unit 20a; a second light emitting unit 20b; an anode 21; a light emitting layer 22; a cathode 23; a pixel definition layer 24; a first pixel opening 241; a second pixel opening 242; a filter layer 30; an adjusting section 31; a first adjuster portion 311; a second adjuster portion 312; a third regulator sub-section 313; a fourth adjuster portion 314; a first color resist unit 32; a first color resist 321; a second color resist region 322; a first color resist portion 323; first doping particles 324; a second color resist unit 33; a third color resist area 331; a fourth color resist region 332; a first inclined surface 333; recess 334; a second color resist portion 334; second doping particles 335; a black matrix 34; a color resist layer 35; a planarization layer 36; a first flat region 361; a second flat region 362; a second ramp 363; an insulating layer 37; an encapsulation layer 40; an inorganic encapsulation layer 41; an organic encapsulation layer 42; a convex portion 50; a first sub-protrusion 51; a second sub-protrusion 52; a touch metal layer 60.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the present application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the present application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art.

A first aspect of the present application provides a display panel. Fig. 1 is a schematic diagram of a film structure of a display panel according to an embodiment of the present application; fig. 2 is a schematic diagram of another film structure of the display panel according to the embodiment of the present application. Referring to fig. 1 and 2 in combination, 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, and the substrate 11 may be a flexible substrate 11 made of Polyimide (PI), polyethylene terephthalate (Polyethylene terephthalate, PET), or the like, so that the non-display area of the display panel 100 may be bendable. A driving circuit for controlling light emission of the display layer 20 is provided in the array layer 12. The array layer 12 is generally formed of inorganic film layers such as a metal layer, a semiconductor layer (active layer), an insulating layer 37, etc., and by patterning these inorganic film layers, a driving circuit for controlling the light emission of the display layer 20 can be formed, and the specific circuit structure thereof has various implementation manners and will not be described herein.

The display layer 20 includes a first light emitting unit 20a and a second light emitting unit 20b that emit light of different colors. Specifically, the display layer 20 includes an anode 21, a light emitting layer 22 on the anode 21, and a cathode 23 on the light emitting layer 22. The light emitting layer 22 includes a plurality of first light emitting units 20a and a plurality of second light emitting units 20b arranged at intervals, and the first light emitting units 20a and the second light emitting units 20b are arranged at intervals. 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, 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 light emitting molecules in the light emitting layer 22, and the excited light emitting molecules radiation transitions so that the corresponding first light emitting unit 20a and second light emitting unit 20b emit light. The material of the anode 21 is generally a material having a high work function in order to improve hole injection efficiency, and may be gold (Au), platinum (Pt), titanium (Ti), silver (Ag), indium Tin Oxide (ITO), zinc tin oxide (IZO), or a transparent conductive polymer (e.g., polyaniline), etc. The cathode 23 is made of a material with a low work function so as to facilitate electron injection, and in addition, heat generated in operation can be reduced, so that the service life of the OLED device is prolonged. The material of the cathode 23 may be one of metal materials such as silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca), or indium (In), and an alloy of the foregoing metal materials, such as magnesium-silver alloy (Mg/Ag), lithium-aluminum alloy (Li/Al), to which the present embodiment is not limited.

Since the light emitting unit has an optical microcavity, the wavelength of the emitted light follows the microcavity effect, that is, mλ=2ndcos θ (m is an integer, λ is a wavelength, n is a refractive index of the microcavity, d is a microcavity length, and θ is an angle). For example, the peak wavelength of the emitted light of the first light emitting unit 20a at a large viewing angle is smaller than the peak wavelength of the emitted light at a front viewing angle, and similar to the first light emitting unit 20a, the peak wavelength and the light intensity of the emitted light of the second light emitting unit 20b at a large viewing angle are both reduced at the front viewing angle, and the chromaticity matching at different viewing angles is caused to be different from the front viewing angle because of the characteristic difference between the first light emitting unit 20a and the second light emitting unit 20b, that is, the degree of variation of the peak wavelength and the light intensity of the emitted light of different colors is different when the same viewing angle is varied, and the color bias of the white light with the variation of the viewing angle is shown to be intensified. When the display panel 100 under the right angle condition is white light, color bias is displayed under a large viewing angle.

As the viewing angle increases, the luminance decay rate of the light emitted from the first light emitting unit 20a is smaller than the luminance decay rate of the light emitted from the second light emitting unit 20b. That is, at a large viewing angle, the decay rate of the first light emitting unit 20a is small, and the decay rate of the second light emitting unit 20b is large. In this way, the brightness of the first light emitting unit 20a is higher, and the brightness of the second light emitting unit 20b is relatively lower, so that the light intensity of the light emitting color of the first light emitting unit 20a is larger than the light intensity of the light emitting color of the second light emitting unit 20b when the user sees the light with the white color at the same large viewing angle, that is, the white screen is biased to the light emitting color of the first light emitting unit 20a at the large viewing angle.

The filter layer 30 in the embodiment of the present application is disposed on a side of the display layer 20 facing away from the array substrate 10, and the filter layer 30 can reduce the ambient light irradiated to the display panel 100. The filter layer 30 includes an adjusting portion 31, and the adjusting portion 31 is configured to reduce the light-emitting rate of the first light-emitting unit 20a at a wide viewing angle. The term "wide viewing angle" means a large viewing angle, i.e., a side viewing angle that deviates from a large forward viewing angle, for example, 30 ° to 89 °.

Since the adjusting portion 31 in the embodiment of the present application can reduce the light-emitting rate of the first light-emitting unit 20a with a wide viewing angle and/or improve the light-emitting rate of the second light-emitting unit 20b with a wide viewing angle. The embodiment of the application can improve the attenuation degree of the first light-emitting unit 20a under a large visual angle, and reduce the mixing proportion of the emitted light of the first light-emitting unit 20a under the large visual angle; and/or, the degree of attenuation of the second light emitting unit 20b at a large viewing angle can be reduced, and the mixing ratio of the emitted light of the second light emitting unit 20b at a large viewing angle can be increased, thereby reducing the phenomenon of large viewing angle character deviation of the display panel 100.

Optionally, the display panel 100 further includes an encapsulation layer 40 disposed on a side of the display layer 20 away from the substrate 11, and the filter layer 30 is disposed on the encapsulation layer 40, where the encapsulation layer 40 covers the display layer 20 to protect the display layer 20 from being corroded and damaged by moisture and oxygen. The encapsulation layer 40 may be a thin film encapsulation layer 40 including an inorganic encapsulation layer 41, an organic encapsulation layer 42, and an inorganic encapsulation layer 41 which are stacked to play a role of blocking moisture and oxygen.

In some embodiments, the filter layer 30 includes a first color resist unit 32, where the first color resist unit 32 and the first light emitting unit 20a are disposed corresponding to each other in a direction X perpendicular to the array substrate, that is, in a direction X perpendicular to the array substrate, a front projection of the first color resist unit 32 on the array substrate 10 and a front projection of the first light emitting unit 20a on the array substrate 10 at least partially overlap. The light emitting side of the display panel 100 is a light emitting side 100a, and a backlight side 100b is provided opposite to the light emitting side 100 a. The first color blocking unit 32 may allow the emitted light of the first light emitting unit 20a to pass through, and emit light to the light emitting side 100a of the display panel 100, and the first color blocking unit 32 may filter the external ambient light.

Alternatively, the light emitting color of the first light emitting unit 20a is green, the light emitting color of the second light emitting unit 20b is red or blue, and the decay rate of green light is smaller than that of blue or red. Taking the example that the light emitting color of the first light emitting unit 20a is green and the light emitting color of the second light emitting unit 20b is red or blue, the first color blocking unit 32 may allow the green light emitted from the first light emitting unit 20a to pass through, the red light or the blue light in the external environment cannot pass through the first color blocking unit 32, and the green light in the external environment is less irradiated into the first light emitting unit 20 a.

The first color resist unit 32 includes a first color resist area 321 and a second color resist area 322 circumferentially disposed along the first color resist area 321. The first color resist 321 is disposed corresponding to the first light emitting unit 20a in the direction X perpendicular to the array substrate, that is, the front projection of the first color resist 321 on the array substrate 10 at least partially overlaps the front projection of the first light emitting unit 20a in the direction X perpendicular to the array substrate.

The adjusting portion 31 is located in the second color blocking region 322, so as to reduce the attenuation of the light-emitting brightness of the positive viewing angle of the first light-emitting unit 20a and ensure the light-emitting brightness of the positive viewing angle.

In some embodiments, the adjusting portion 31 is a protrusion 50 formed by protruding the second color resist region 322 along a direction X perpendicular to the array substrate; and the thickness of the second color resistance region 322 is greater than that of the first color resistance region 321 along the direction X perpendicular to the array substrate. The convex portion 50 may protrude toward a side facing away from the array substrate 10 as shown in fig. 1, or may protrude toward a side of the array substrate 10 as shown in fig. 2, only by satisfying the condition of increasing the thickness of the second color resist region 322.

Since the thickness of the second color resist region 322 is greater than that of the first color resist region 321, the optical path of the first light emitting unit 20a passing through the first color resist unit 32 at a large viewing angle can be increased, thereby increasing the attenuation degree of the first light emitting unit 20a at a large viewing angle and reducing the light output of the first light emitting unit 20a at a large viewing angle.

In some embodiments, the display layer 20 is formed with 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 defining layer 24, and the pixel defining layer 24 is provided with a first pixel opening 241 along a direction X perpendicular to the array substrate, and by providing the first pixel opening 241, interference between adjacent light emitting devices can be reduced, and a light emitting effect can be ensured.

In the direction X perpendicular to the array substrate, the projection of the first color resist region 321 is located in the first pixel opening 241, and the projection of the second color resist region 322 is circumferentially disposed along the first pixel opening 241. That is, the front projection of the first color resist 321 on the array substrate 10 falls into the first pixel opening 241, and the front projection of the second color resist 322 on the array substrate 10 is circumferentially surrounded along the front projection of the first pixel opening 241 on the array substrate 10. The light emitted from the first light emitting unit 20a can be emitted at a positive viewing angle through the first color resist region 321, and the light emitted from the first light emitting unit 20a is emitted at a large viewing angle through the second color resist region 322, so that the light emitting brightness at the positive viewing angle is not reduced in the present embodiment.

Optionally, the area of the front projection of the first color blocking area 321 on the array substrate 10 is equal to the area of the front projection of the first pixel opening 241 on the array substrate 10, so as to further improve the light-emitting brightness of the front viewing angle of the first light-emitting unit 20 a. Optionally, the front projection of the first color blocking area 321 on the array substrate coincides with the front projection of the first pixel opening 241 on the array substrate.

Optionally, the first pixel openings 241 are gradually widened from the backlight side 100b of the display panel 100 toward the light emitting side 100a, i.e. the opening area gradually increases, so as to improve the light emitting efficiency.

Fig. 3 is a schematic diagram of a film structure of a display panel according to an embodiment of the present application. As shown in fig. 3, in some embodiments, the filter layer 30 further includes a second color blocking unit 33, where the second color blocking unit 33 and the second light emitting unit 20b are disposed correspondingly in a direction X perpendicular to the array substrate. That is, in the direction X perpendicular to the array substrate, the orthographic projection of the second color resist unit 33 on the array substrate 10 at least partially overlaps with the orthographic projection of the second light emitting unit 20b on the array substrate 10. The second color blocking unit 33 may allow the emitted light of 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 blocking unit 33 may filter the external ambient light. Taking the example that the light emitting color of the second light emitting unit 20b is red or blue, the second color blocking unit 33 may allow the red light or the blue light emitted from the second light emitting unit 20b to pass through, the green light in the external environment cannot pass through the second color blocking unit 33, and the red light or the blue light in the external environment is less irradiated into the first light emitting unit 20 a.

The second color-resisting unit 33 includes a third color-resisting region 331 and a fourth color-resisting region 332 circumferentially disposed along the third color-resisting region 331; the thickness of the fourth color resist region 332 is smaller than the thickness of the third color resist region 331 in the direction X perpendicular to the array substrate.

The fourth color resist region 332 may be recessed with respect to the third color resist region 331 along a direction X perpendicular to the array substrate to form a recess 334 for reducing the thickness of the fourth color resist region 332. Wherein, the side of the fourth color blocking area 332 facing away from the array substrate 10 may be recessed downward; and/or, the fourth color resist region 332 is recessed upward toward one side of the array substrate 10, which only needs to satisfy the condition of thinning the thickness of the fourth color resist region 332.

Since the thickness of the fourth color resist region 332 is smaller than that of the third color resist region 331, the optical path of the second light emitting unit 20b passing through the second color resist unit 33 at a large viewing angle can be reduced, thereby reducing the attenuation degree of the large viewing angle of the second light emitting unit 20b and improving the light output amount of the second light emitting unit 20b at the large viewing angle.

Optionally, a black matrix 34 is disposed between the adjacent first color resistance unit 32 and second color resistance unit 33 of the filter layer 30, so that the first color resistance unit 32 and the second color resistance unit 33 are connected to one another through the black matrix 34. By providing the black matrix 34, the entrance of ambient light into the area between adjacent light emitting units can be reduced or avoided, and display interference can be improved without affecting the light emission of the light emitting units.

Optionally, the display layer 20 is formed with a second pixel opening 242, and the second light emitting unit 20b is located in the second pixel opening 242. Specifically, the display layer 20 includes a pixel defining layer 24, and the pixel defining layer 24 is provided with a second pixel opening 242 along a direction X perpendicular to the array substrate, and by providing the second pixel opening 242, interference between adjacent first light emitting units 20a and second light emitting units 20b can be reduced, so as to ensure a light emitting effect.

In the direction X perpendicular to the array substrate, the projection of the third color blocking area 331 is located in the second pixel opening 242, and the projection of the fourth color blocking area 332 is circumferentially disposed along the second pixel opening 242. That is, the orthographic projection of the third color blocking area 331 on the array substrate 10 falls into the second pixel opening 242, and the orthographic projection of the fourth color blocking area 332 on the array substrate 10 is circumferentially surrounded along the orthographic projection of the second pixel opening 242 on the array substrate 10. The light emitted from the second light emitting unit 20b can be emitted at a positive viewing angle through the third color blocking region 331, and the light emitted from the second light emitting unit 20b can be emitted at a large viewing angle through the fourth color blocking region 332, so that the light emitting brightness at the positive viewing angle is not reduced in the present embodiment.

Optionally, the area of the orthographic projection of the third color blocking area 331 on the array substrate 10 is equal to the area of the orthographic projection of the second pixel opening 242 on the array substrate 10, so as to further improve the light emitting brightness of the second light emitting unit 20b in the forward viewing angle.

Optionally, the second pixel openings 242 are gradually widened from the backlight side 100b of the display panel 100 toward the light emitting side 100a, i.e. the opening area gradually increases, so as to improve the light emitting efficiency.

Fig. 4 is a schematic diagram of another film structure of the display panel according to the embodiment of the present application. In some embodiments, as shown in fig. 4, a first inclined plane 333 connected to the third color blocking area 331 is formed on a side of the fourth color blocking area 332 facing away from the display layer 20, the first inclined plane 333 is a curved inclined plane protruding toward a side facing away from the display layer 20, and the protruding curved portion forms a prism structure, which can be used for scattering light, and can increase the light output of the second light emitting unit 20b at a large viewing angle and reduce color cast at the large viewing angle.

In some embodiments, the light emitting color of the first light emitting unit 20a is green, and the light emitting color of the second light emitting unit 20b is blue or red. The first light emitting unit 20a is a green light emitting unit emitting green light, and the second light emitting unit 20b is a blue light emitting unit emitting blue light or a red light emitting unit emitting red light. For the tri-primary light, the display panel 100 includes a plurality of pixel units arranged at intervals, each of which 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 light emitting unit and the red light emitting unit, respectively, the brightness of the green light emitting unit is reduced at the slowest speed along with the increase of the viewing angle, and the display panel 100 displays a greenish phenomenon under a large viewing angle without the adjustment portion 31.

Since the light-emitting rate of the wide viewing angle of the green light-emitting unit can be reduced by the adjusting portion 31, the attenuation degree of the green light-emitting unit under the large viewing angle can be improved, and the mixing proportion of the emitted light of the green light-emitting unit under the large viewing angle can be reduced, thereby reducing the large viewing angle greenish phenomenon of the display panel 100.

Fig. 5 is a schematic structural diagram of a first color resist unit provided in an embodiment of the present application, and fig. 6 is a schematic structural diagram of a second color resist unit provided in an embodiment of the present application. In some embodiments, as shown in fig. 5, the maximum thickness difference between the second color resist region 322 and the first color resist region 321 is D1. As shown in fig. 6, 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.

It should be noted that, the "maximum thickness difference between the second color resist region 322 and the first color resist region 321" refers to: the difference of the thickness value of the second color resistance region 322 along the direction X perpendicular to the array substrate minus the thickness value of the first color resistance region 321 along the direction X perpendicular to the array substrate; the "maximum thickness difference between the fourth color resist region 332 and the third color resist region 331" means: the difference of the maximum thickness value of the third color resist 331 along the direction X perpendicular to the array substrate minus the minimum thickness value of the fourth color resist 332 along the direction X perpendicular to the array substrate.

In the above embodiment, D1 is larger than D2, that is, the optical path difference between the large viewing angle and the front viewing angle of the first light emitting unit 20a is larger than the optical path difference between the large viewing angle and the front viewing angle of the second light emitting unit 20b, and the adjustment degree of the luminance degradation of the first light emitting unit 20a is larger than the adjustment degree of the luminance degradation of the second light emitting unit 20b at the large viewing angle, so as to further alleviate the color cast phenomenon of the display panel 100 at the large viewing angle.

Fig. 7 is a schematic view of another film structure of the display panel according to the embodiment of the present application. In other embodiments, as shown in fig. 7, 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 a surface of the color resist layer 35.

In the direction X perpendicular to the array substrate, the portion of the planarization layer 36 disposed corresponding to the second light emitting unit 20b includes a first flat region 361 and a second flat region 362, the second flat region 362 being disposed circumferentially around the first flat region 361, and the adjustment portion 31 being located in the second flat region 362. The adjustment portion 31 may not be provided to the color resist layer 35, and the adjustment portion 31 may be provided to the second flat region 362. The front projection of the first flat region 361 on the array substrate 10 at least partially overlaps with the front projection of the second light emitting unit 20b on the array substrate 10, and the front projection of the second flat region 362 on the array substrate 10 does not overlap with the front projection of the second light emitting unit 20b on the array substrate 10. Since the second flat region 362 is provided with the adjusting portion 31, the light-emitting rate of the second light-emitting unit 20b at a wide viewing angle can be improved, so that the light-emitting rate of the second light-emitting unit 20b at a wide viewing angle can be improved, the mixing ratio of the light emitted from the second light-emitting unit 20b at a large viewing angle can be improved, and the color cast phenomenon of the display panel 100 at a large viewing angle can be improved.

In some embodiments, the adjusting portion 31 is a protrusion 50 protruding from the second flat region 362 in a direction X perpendicular to the array substrate relative to the first flat region 361, and a second inclined surface 363 connected to the second flat region 362 is formed on a side of the protrusion 50 facing away from the color resist layer 35, and the second inclined surface 363 is a curved inclined surface protruding toward a side facing away from the color resist layer 35. The convexly curved portion forms a prism structure that can be used to scatter light, and can increase the light output of the second light emitting unit 20b at a large viewing angle, reducing the color cast phenomenon at a large viewing angle.

Fig. 8 is a schematic diagram of another film structure of the display panel according to the embodiment of the present application. In other embodiments, as shown in fig. 8, the adjusting portion 31 includes a first adjusting sub-portion 311 and a second adjusting sub-portion 312, where the first adjusting sub-portion 311 is a first sub-protrusion 51 formed by protruding the second color resist region 322 along a direction X perpendicular to the array substrate; and the thickness of the second color resistance region 322 is greater than that of the first color resistance region 321 along the direction X perpendicular to the array substrate. The second adjusting sub-portion 312 is a second sub-protrusion 52 protruding in the direction X perpendicular to the array substrate relative to the first flat region 361 in the second flat region 362, and a second inclined surface 363 connected to the second flat region 362 is formed on a side of the second sub-protrusion 52 facing away from the color resist layer 35, and the second inclined surface 363 is a curved inclined surface protruding toward a side facing away from the color resist layer 35. The present embodiment can simultaneously reduce the light-emitting rate of the first light-emitting unit 20a with a wide viewing angle and improve the light-emitting rate of the second light-emitting unit 20b with a wide viewing angle, and improve the color cast phenomenon of the display panel 100 with a large viewing angle through the cooperation of the first adjuster portion 311 and the second adjuster portion 312.

Fig. 9 is a schematic diagram of another film structure of the display panel according to the embodiment of the present application. In other embodiments, as shown in fig. 9, the filter layer 30 includes a color blocking layer 35 and an insulating layer 37, the display panel 100 further includes a touch metal layer 60 disposed on a side of the display layer 20 facing away from the array substrate 10, and the insulating layer 37 is disposed between the touch metal layer 60 and the color blocking layer 35. The color resist layer 35 includes a first color resist unit 32, and the first color resist unit 32 and the first light emitting unit 20a are disposed in a direction X perpendicular to the array substrate. That is, the front projection of the first color resist unit 32 on the array substrate 10 at least partially overlaps the front projection of the first light emitting unit 20a on the array substrate 10.

The first color resist unit 32 and the insulating layer 37 form the adjustment portion 31, and the first color resist unit 32 includes a first color resist portion 323, and first doping particles 324 doped in the first color resist portion 323, and a refractive index of the first doping particles 324 is smaller than a refractive index of the first color resist portion 323. The insulating layer 37 is made of an inorganic material having a high refractive index of silicon nitride, and the refractive index of the insulating layer 37 is larger than that of the first color resist 323. When light enters a medium of lower refractive index from a medium of higher refractive index, the refracted light will disappear if the angle of incidence is greater than a certain critical angle, and all incident light will be reflected without entering a medium of lower refractive index.

The first doping particles 324 may be low refractive index silicon oxide nanoparticles, and the refractive index of the first color resist unit 32 is reduced because the first color resist portion 323 is doped with the first doping particles 324. Therefore, the refractive index difference between the insulating layer 37 and the first color resist portion 323 increases, the critical angle at which the emitted light of the first light emitting unit 20a is totally reflected at the interface between the first color resist portion 323 and the insulating layer 37 becomes smaller, total reflection is more likely to occur, the reflectivity of the interface between the first color resist portion 323 and the insulating layer 37 of the first light emitting unit 20a is increased, the light emitting brightness of the first light emitting unit 20a at a large viewing angle is reduced, and the color cast phenomenon of the display panel 100 at a large viewing angle is improved.

Optionally, the front projection of the first light emitting unit 20a on the array substrate 10 falls within the front projection range of the first color resistance portion 323 on the array substrate 10, and the front projection area of the first light emitting unit 20a on the array substrate 10 is smaller than the front projection area of the first color resistance portion 323 on the array substrate 10, so that the reflectivity of the interface between the first color resistance portion 323 and the insulating layer 37 of the outgoing light with a large viewing angle of the first light emitting unit 20a can be further improved.

Fig. 10 is a schematic view of another film structure of the display panel according to the embodiment of the present application. In a further embodiment, as shown in fig. 10, the color resist layer 35 further includes a second color resist unit 33, and the second color resist unit 33 and the second light emitting unit 20b are disposed correspondingly in a direction X perpendicular to the array substrate. That is, the front projection of the second color resist unit 33 on the array substrate 10 at least partially overlaps the front projection of the second light emitting unit 20b on the array substrate 10. The second color resist unit 33 and the insulating layer 37 form the adjustment portion 31, specifically, the adjustment portion 31 includes a third adjustment sub-portion 313 and a fourth adjustment sub-portion 314, and the insulating layer 37 forms the third adjustment sub-portion 313 along the direction X perpendicular to the array substrate for the portion corresponding to the first color resist portion 323 and the first color resist portion 323; the insulating layer 37 is used to form a fourth adjustment sub-portion 314 along a direction X perpendicular to the array substrate for a portion corresponding to the second color resist portion 334 and the second color resist portion 334.

It should be noted that: "a portion of the insulating layer 37 for corresponding to the first color resist portion 323 in the direction X perpendicular to the array substrate" means: the insulating layer 37 overlaps the front projection of the array substrate 10 and the front projection of the first color resist 323 on the array substrate 10. "a portion of the insulating layer 37 for corresponding to the second color resist portion 334 along the direction X perpendicular to the array substrate" means: the insulation layer 37 overlaps the orthographic projection of the array substrate 10 and the orthographic projection of the second color resist portion 334 on the array substrate 10.

The second color resist unit 33 includes a second color resist portion 334 and second doping particles 335 doped in the second color resist portion 334, the refractive index of the second doping particles 335 being greater than the refractive index of the second color resist portion 334. The insulating layer 37 is made of an inorganic material with a higher refractive index of silicon nitride, and the refractive index of the insulating layer 37 is larger than that of the second color resistance portion 334. The second doping particles 335 may be zirconia or titania nanoparticles with a high refractive index, and the second color resist portion 334 is doped with the second doping particles 335, so that the refractive index of the second color resist unit 33 is improved, the refractive index difference between the insulating layer 37 and the second color resist portion 334 is increased, the critical angle of total reflection of the emitted light of the second light emitting unit 20b at the interface between the second color resist portion 334 and the insulating layer 37 is increased, total reflection is not easy to occur, the reflectivity of the interface between the second color resist portion 334 and the insulating layer 37 of the second light emitting unit 20b is reduced, the light emitting brightness of the second light emitting unit 20b at a large viewing angle is improved, and the color cast phenomenon of the large viewing angle of the display panel 100 is improved.

Optionally, the front projection of the second light emitting unit 20b on the array substrate 10 falls within the front projection range of the second color blocking portion 334 on the array substrate 10, and the front projection area of the second light emitting unit 20b on the array substrate 10 is smaller than the front projection area of the second color blocking portion 334 on the array substrate 10, so that the reflectivity of the interface between the second color blocking portion 334 and the insulating layer 37 of the outgoing light with a large viewing angle of the second light emitting unit 20b can be further reduced.

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 degree of the large viewing angle total reflection of the first light emitting unit 20a is greater than the decrease degree of the large viewing angle total reflection of the second light emitting unit 20b, so that the adjustment degree of the luminance attenuation of the first light emitting unit 20a under the large viewing angle is greater than the adjustment degree of the luminance attenuation of the second light emitting unit 20b under the large viewing angle, and the color cast phenomenon of the display panel 100 under the large viewing angle is further alleviated.

Fig. 11 is a schematic view of another film structure of the display panel according to the embodiment of the present application. In other embodiments, as shown in fig. 11, the first color resist portion 323 is not doped with the first doping particles 324, and the second color resist portion 334 is doped with the second doping particles 335, so that the light-emitting brightness of the first light-emitting unit 20a under the large viewing angle is kept unchanged, the light-emitting brightness of the second light-emitting unit 20b under the large viewing angle is improved, and the color cast phenomenon of the display panel 100 under the large viewing angle can also be improved.

Fig. 12 is a schematic view of another film structure of the display panel according to the embodiment of the present application. In still other embodiments, as shown in fig. 12, the adjustment portion 31 includes a first adjustment sub-portion 311 and a third adjustment sub-portion 313, where the first adjustment sub-portion 311 is a first sub-protrusion 51 formed by protruding the second color resist region 322 along a direction X perpendicular to the array substrate; and the thickness of the second color resistance region 322 is greater than that of the first color resistance region 321 along the direction X perpendicular to the array substrate. The third adjusting sub-portion 313 is formed by the insulating layer 37 and the first color resistor portion 323 along the direction X perpendicular to the array substrate, the portion corresponding to the first color resistor portion 323, the first color resistor unit 32 includes the first color resistor portion 323 and the first doped particles 324 doped in the first color resistor portion 323, the refractive index of the first doped particles 324 is smaller than that of the first color resistor portion 323, the insulating layer 37 is made of an inorganic material with a higher refractive index of silicon nitride, and the refractive index of the insulating layer 37 is larger than that of the first color resistor portion 323. The first and third adjustment sub-portions 311 and 313 of the present embodiment can simultaneously reduce the light output rate of the first light emitting unit 20a at a wide viewing angle, so as to improve the color cast phenomenon of the display panel 100 at a large viewing angle.

Of course, in other embodiments, the adjusting portion 31 may be configured according to the specific situation, and the first adjusting sub-portion 311, the second adjusting sub-portion 312, the third adjusting sub-portion 313 and the fourth adjusting sub-portion 314 may be arbitrarily selected, that is, the composition of the adjusting portion 31 may have various implementation manners, so long as the condition of improving the color cast phenomenon of the large viewing angle of the display panel 100 can be satisfied, which is not described herein.

A second aspect of the present application provides a display device including the display panel 100 described above. The display device adopts all the technical schemes of all the embodiments, so that the display device has at least all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein. For example, the display device may be an electronic device such as a mobile phone, a computer, a smart wearable device (e.g., a smart watch), and a vehicle-mounted display device, which is not limited in the embodiments of the present application.

While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (14)

1. A display panel, comprising:

an array substrate having a plurality of substrates arranged in a row,

the display layer comprises a first light-emitting unit and a second light-emitting unit which emit light with different colors, and the brightness decay rate of the light emitted by the first light-emitting unit is smaller than that of the light emitted by the second light-emitting unit along with the increase of the visual angle;

the optical filter layer is arranged on one side, away from the array substrate, of the display layer, and comprises an adjusting part, wherein the adjusting part is used for reducing the light-emitting rate of the first light-emitting unit in a wide view angle; and/or, the light-emitting device is used for improving the light-emitting rate of the second light-emitting unit in a wide viewing angle.

2. The display panel according to claim 1, wherein the filter layer includes a first color blocking unit, the first color blocking unit and the first light emitting unit are disposed corresponding to each other in a direction perpendicular to the array substrate, the first color blocking unit includes a first color blocking region and a second color blocking region circumferentially disposed along a circumferential direction of the first color blocking region, and the adjusting portion is disposed in the second color blocking region.

3. The display panel according to claim 2, wherein the adjustment portion is a convex portion of the second color resist region formed to protrude in a direction perpendicular to the array substrate; and the thickness of the second color resistance area is larger than that of the first color resistance area along the direction perpendicular to the array substrate.

4. A display panel according to claim 3, wherein the display layer is formed with a first pixel opening, the first light emitting unit being located within the first pixel opening;

in the direction perpendicular to the array substrate, the projection of the first color resistance region is located in the first pixel opening, and the projection of the second color resistance region is circumferentially arranged along the first pixel opening.

5. The display panel according to claim 3, wherein the filter layer further comprises a second color blocking unit, the second color blocking unit and the second light emitting unit are disposed corresponding to each other in a direction perpendicular to the array substrate, and the second color blocking unit comprises a third color blocking region and a fourth color blocking region disposed circumferentially around the third color blocking region; and the thickness of the fourth color resistance region is smaller than that of the third color resistance region along the direction perpendicular to the array substrate.

6. The display panel according to claim 5, wherein a side of the fourth color blocking region facing away from the display layer is formed with a first inclined surface connected to the third color blocking region, and the first inclined surface is a curved inclined surface protruding toward a side facing away from the display layer.

7. The display panel according to claim 5, wherein the light emitting color of the first light emitting unit is green and the light emitting color of the second light emitting unit is blue or red.

8. The display panel of claim 7, wherein the second color blocker and the first color blocker have a maximum thickness difference of D1, and the fourth color blocker and the third color blocker have a maximum thickness difference of D2, D1 being greater than D2.

9. The display panel of claim 1, wherein the filter layer comprises a color blocking layer and a planarization layer disposed on the color blocking layer, the color blocking layer being between the display layer and the planarization layer; in the direction perpendicular to the array substrate, the part of the planarization layer, which is arranged corresponding to the second light-emitting unit, comprises a first flat area and a second flat area, the second flat area is circumferentially arranged along the circumference of the first flat area, and the adjusting part is positioned in the second flat area.

10. The display panel according to claim 9, wherein the adjustment portion is a protrusion protruding in a direction perpendicular to the array substrate from the second flat region toward the first flat region, a second inclined surface connected to the second flat region is formed on a side of the protrusion facing away from the color resist layer, and the second inclined surface is a curved inclined surface protruding toward a side facing away from the color resist layer.

11. The display panel according to claim 1, wherein the filter layer comprises a color resistance layer and an insulating layer, the display panel further comprises a touch metal layer arranged on one side of the display layer away from the array substrate, the insulating layer is arranged between the touch metal layer and the color resistance layer, the color resistance layer comprises a first color resistance unit, and the first color resistance unit and the first light-emitting unit are correspondingly arranged in a direction perpendicular to the array substrate; the first color resistance unit and the insulating layer form the adjusting part, the first color resistance unit comprises a first color resistance part and first doped particles doped in the first color resistance part, and the refractive index of the first doped particles is smaller than that of the first color resistance part.

12. The display panel according to claim 11, wherein the color resist layer further comprises a second color resist unit disposed in correspondence with the second light emitting unit in a direction perpendicular to the array substrate; the second color resistance unit and the insulating layer form the adjusting part, the second color resistance unit comprises a second color resistance part and second doping particles doped in the second color resistance part, and the refractive index of the second doping particles is larger than that of the second color resistance part.

13. The display panel of claim 12, wherein a refractive index difference between the first color resist unit and the insulating layer is greater than a refractive index difference between the second color resist unit and the insulating layer.

14. A display device characterized by comprising the display panel according to any one of claims 1 to 13.

Images