CN115988917A - Display panel and display device - Google Patents

Abstract

The application discloses display panel and display device relates to and shows technical field, can improve display panel's color purity and light guide yield. A display panel, comprising: a first substrate layer; the plurality of sub-pixels are arranged on one side of the first substrate layer, and a pixel defining structure is arranged between every two adjacent sub-pixels; the shading structures are arranged on one side, away from the first substrate layer, of the sub-pixels, light guide layers are arranged between the adjacent shading structures, and the orthographic projection of the shading structures on the first substrate layer falls into the orthographic projection of the pixel defining structures on the first substrate layer; and the light reflection layer is arranged on the side wall of the shading structure in the thickness direction.

Description

Display panel and display device

Technical Field

The application relates to the technical field of display, in particular to a display panel and a display device.

Background

At present, with the continuous development of display technology, the requirements for low power consumption and high color purity of a display screen are higher and higher. The low power consumption corresponds to the environmental protection requirement and is the embodiment of green sustainable development of society. By increasing the light guiding efficiency, less energy is consumed by devices reaching the same display effect, and lower power consumption is realized.

However, in the conventional display panel, the sub-pixels of different colors are separated by the pixel defining layer, but light emission mixing between adjacent sub-pixels cannot be avoided, so that improvement of color purity is limited, and light guide efficiency is difficult to improve.

Disclosure of Invention

The embodiment of the application provides a display panel and a display device, which can improve the color purity and the light guide yield of the display panel.

In a first aspect of embodiments of the present application, a display panel is provided, including:

a first substrate layer;

the plurality of sub-pixels are arranged on one side of the first substrate layer, and a pixel defining structure is arranged between every two adjacent sub-pixels;

the shading structures are arranged on one side, away from the first substrate layer, of the sub-pixels, light guide layers are arranged between the adjacent shading structures, and the orthographic projection of the shading structures on the first substrate layer falls into the orthographic projection of the pixel defining structures on the first substrate layer;

and the light reflection layer is arranged on the side wall of the shading structure in the thickness direction.

In some embodiments, the display panel further includes:

the filter layer is arranged between the adjacent shading structures;

the orthographic projection of the sub-pixels on the first substrate layer falls into the orthographic projection of the filter layer on the first substrate layer;

the orthographic projection of the sub-pixels on the first substrate layer falls within the orthographic projection of the light-deriving layer on the first substrate layer.

In some embodiments, the filter layer is disposed on a side of the light extraction layer remote from the first substrate layer, and/or the filter layer is disposed between the sub-pixels and the light extraction layer.

In some embodiments, the display panel further includes:

a second substrate layer disposed between the sub-pixels and the light-deriving layer;

the second substrate layer has a refractive index less than the refractive index of the light-deriving layer.

In some embodiments, the display panel further includes:

an encapsulation layer disposed between the sub-pixels and the second substrate layer;

the refractive index of the second substrate layer is greater than the refractive index of the encapsulation layer.

In some embodiments, the ratio of the refractive index of the second substrate layer to the refractive index of the encapsulation layer ranges from 1.05 to 1.5; and/or the presence of a gas in the gas,

the ratio of the refractive index of the light-deriving layer to the refractive index of the second substrate layer ranges from 1.05 to 1.5.

In some embodiments, the light-guiding layer covers a side of the light-shielding structure remote from the first substrate layer.

In some embodiments, light rays with an exit angle larger than a first angle, which are emitted from a central position of a light-emitting area formed by the sub-pixels correspondingly, are blocked by the light-shielding structure, and the exit angle is an included angle between the light rays and a direction perpendicular to a plane where the first substrate layer is located;

the size of the first angle is inversely related to the vertical distance between the light shielding structure and the sub-pixel.

In some embodiments, the light rays with an exit angle smaller than the first angle and larger than the second angle, which are emitted from the center of the light-emitting region formed corresponding to the sub-pixel, are reflected by the light-reflecting layer and then exit;

the second angle is smaller than the first angle, and the size of the second angle is in negative correlation with the vertical distance between the light shielding structure and the sub-pixel.

In some embodiments, the light rays with the exit angle smaller than the second angle, which are emitted from the center of the light exit region formed corresponding to the sub-pixel, exit through the light exit layer.

In some embodiments, the first angle ranges from 70 ° to 85 °; and/or the presence of a gas in the atmosphere,

the second angle is in the range of 40 ° to 50 °.

In some embodiments, the sub-pixel includes a first electrode, a light emitting layer disposed between the first electrode and the second electrode, and a second electrode;

the first electrode is arranged between the first substrate layer and the pixel defining structure, the light emitting layer is arranged between adjacent pixel defining structures, and the second electrode covers the light emitting layer and the pixel defining structures.

In some embodiments, the display panel further includes:

the liquid crystal layer is arranged between the sub-pixels and the shading structure;

the sub-pixels include pixel electrodes.

In some embodiments, the first substrate layer includes a pixel drive circuit electrically connected to the sub-pixels.

In a second aspect of the embodiments of the present application, there is provided a display device including:

the display panel according to the first aspect.

According to the display panel provided by the embodiment of the application, the light guide rate of the sub-pixel emission can be enhanced by arranging the light guide layer; the light emitted by the large angle can be reflected and then emitted by the light reflection layer, so that the effect of relatively converging the light can be achieved, and the light can be converged towards the front view angle of the display panel. The light reflection layer is arranged on the side wall of the shading structure in the thickness direction, and can reflect the light irradiated on the side wall of the shading structure for wide-angle outgoing to the direction outgoing which tends to the normal viewing angle, so that on one hand, the light guide output rate can be improved, the light waste caused by the absorption or shielding of the shading structure for the wide-angle outgoing light is reduced, the drive power consumption of the display panel is not influenced, and even the drive power consumption can be reduced under the condition of higher light guide output rate. On the other hand, the light emitted at a large angle and the light emitted at a large angle of the adjacent sub-pixels can be prevented from mixing, so that the display color cast is avoided, and the light purity is reduced. Therefore, the arrangement of the light reflecting layer and the light guide-out layer can improve the light guide-out rate of the sub-pixels of the display panel for emitting light, improve the display brightness of the display panel, reduce the light mixing of different colors of light among different sub-pixels, avoid the occurrence of display color cast of the display panel and improve the light purity of the display panel.

Drawings

Fig. 1 is a schematic structural diagram of a display panel provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

FIG. 4 is a schematic film structure diagram of a sub-pixel according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a display panel provided in an embodiment of the present application;

fig. 7 is a schematic partial structure diagram of a display panel according to an embodiment of the present application;

fig. 8 is a schematic partial structure diagram of another display panel provided in an embodiment of the present application;

fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present application.

Detailed Description

In order to better understand the technical solutions provided by the embodiments of the present specification, the technical solutions of the embodiments of the present specification are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and are not limitations on the technical solutions of the embodiments of the present specification, and the technical features in the embodiments and examples of the present specification may be combined with each other without conflict.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "...," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element. The term "two or more" includes the case of two or more.

At present, with the continuous development of display technology, the requirements for low power consumption and high color purity of a display screen are higher and higher. The low power consumption corresponds to the environmental protection requirement, and is the embodiment of green and sustainable development of society. By increasing the light guiding efficiency, less energy is consumed by devices reaching the same display effect, and lower power consumption is realized. However, in the conventional display panel, the sub-pixels of different colors are separated by the pixel defining layer, but the light emission mixing between the adjacent sub-pixels cannot be avoided, so that the improvement of color purity is limited, and the light guiding rate is difficult to improve.

In view of the above, embodiments of the present disclosure provide a display panel and a display device, which can improve color purity and light guide yield of the display panel.

In a first aspect of an embodiment of the present application, a display panel is provided, and fig. 1 is a schematic structural diagram of the display panel provided in the embodiment of the present application. As shown in fig. 1, the display panel includes: a first substrate layer 100, a plurality of sub-pixels 200, a light shielding structure 300 and a light reflecting layer 400. The plurality of sub-pixels 200 are arranged on one side of the first substrate layer 100, and a pixel defining structure 500 is arranged between the adjacent sub-pixels 200; the shading structures 300 are arranged on one side of the sub-pixel 200 far away from the first substrate layer 100, a light guide layer 600 is arranged between the adjacent shading structures 300, and the orthographic projection of the shading structures 300 on the first substrate layer 100 falls into the orthographic projection of the pixel defining structure 500 on the first substrate layer 100; the light reflecting layer 400 is disposed on a sidewall of the light shielding structure 300 in the thickness direction. It should be noted that the sub-pixel 200 may actively emit light, for example, light emitted by a light emitting device; the sub-pixel 200 may also emit light passively, and may be a device for controlling the light transmittance of the backlight source, and the light emission of the sub-pixel can be realized regardless of whether the light is emitted actively or transmitted. The light emitted from the sub-pixel 200 may exit from the light exit layer 600, or may exit after being reflected by the light reflection layer 400. Illustratively, the light emitted from the sub-pixel 200 may directly exit through the light guiding layer 600, such as the first light L1 shown in fig. 1; the light emitted from the sub-pixel 200 may pass through the light guiding layer 600 and then be reflected by the light reflecting layer 400 to be emitted, as shown by a second light L2 in fig. 2. The light propagation paths of the first and second light rays L1 and L2 may be different based on the angle at which light exits the sub-pixel 200. The setting of light derivation layer 600 can strengthen the derivation rate of light, and the setting of light reflection layer 400 can reflect the back outgoing with the light of wide-angle outgoing, can play the effect of the relative light that assembles, can assemble the effect that light assembled to display panel's normal view angle's direction promptly. The light reflection layer 400 is disposed on the side wall of the light shielding structure 300 in the thickness direction, and can reflect the light irradiated on the side wall of the light shielding structure 300 from the wide-angle emergent light to the direction of the normal viewing angle, so as to improve the light guide output rate, reduce the light waste caused by the absorption or shielding of the wide-angle emergent light by the light shielding structure 300, not affect the driving power consumption of the display panel, and even reduce the driving power consumption under the condition of high light guide output rate. On the other hand, the light emitted at a large angle can be prevented from mixing with the light emitted at a large angle of the adjacent sub-pixel 200, so that the display color cast is avoided, and the light purity is reduced. Therefore, the arrangement of the light reflecting layer 400 and the light guide-out layer 600 can improve the light guide-out rate of the light emitted by the sub-pixels of the display panel, improve the display brightness of the display panel, reduce the light mixing of different colors of light among different sub-pixels, avoid the occurrence of display color cast of the display panel, and improve the light purity of the display panel.

For example, the sub-pixel 200 shown in fig. 1 includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, and the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B may constitute a pixel unit, and the pixel unit may form white light. Fig. 1 is only schematic, and color matching of different sub-pixels may be performed by a pixel unit according to specific display chromaticity requirements, which is not limited in this embodiment of the present invention. It should be noted that the sub-pixel 200 may also emit white light for being applied to different scenes. The pixel defining structure 500 may serve to separate the sub-pixels 200 to avoid color mixing between sub-pixels of different colors. The orthographic projection of the pixel definition structure 500 on the first substrate layer 100 covers the orthographic projection of the shading structure 300 on the first substrate layer 100, and the arrangement of the shading structure 300 does not shade the emergent light of the sub-pixel 200 and influence the light guiding rate of the display panel. The orthographic projection of the light guide layer 600 on the first substrate layer 100 covers the orthographic projection of the sub-pixels 200 on the first substrate layer 100, so that the light rays emitted by the sub-pixels 200 and entering the light guide layer 600 can be ensured to be totally emitted. It is easy to understand that the pixel defining structure 500 and the light shielding structure 300 are patterned structures and are both provided with hollow portions, so that the sub-pixel 200 is disposed in the hollow portion of the pixel defining structure 500, and the light guiding layer 600 is disposed in the hollow portion of the light shielding structure 300. It is easily understood that the sub-pixel 200 corresponds to the light guide-out layer 600 and the pixel defining structure 500 corresponds to the light blocking structure 300.

It should be noted that, in general, light emitted from a sub-pixel of a display panel with a large viewing angle is blocked or absorbed, so that the light emission rate is reduced, the light guide rate is low, the display luminance is low, and the display luminance is compensated by enhancing a driving signal to increase the display luminance, but the driving power consumption is increased. In addition, there is a portion of light emitted from the sub-pixel with a large viewing angle that mixes with light emitted from an adjacent sub-pixel with a large viewing angle, resulting in mixing of light of different colors, and thus the display chromaticity becomes impure, i.e., the display chromaticity shifts, resulting in color shift of the display, which affects the display effect.

In view of the above problems, the display panel provided in the embodiment of the present application can enhance the light guiding rate of the light emitted from the sub-pixel 200 by disposing the light guiding layer 600; the light reflecting layer 400 can reflect the light emitted from a large angle and then emit the light, so that the light can be relatively converged, namely the light can be converged towards the front view angle of the display panel. The light reflection layer 400 is disposed on the side wall of the light shielding structure 300 in the thickness direction, and can reflect the light irradiated on the side wall of the light shielding structure 300 and emitted in the direction of the normal viewing angle, so that the light guide output rate can be improved, the light waste caused by the absorption or shielding of the light shielding structure 300 by the wide-angle emitted light can be reduced, the driving power consumption of the display panel is not affected, and even the driving power consumption can be reduced under the condition of high light guide output rate. On the other hand, the light emitted at a large angle can be prevented from mixing with the light emitted at a large angle of the adjacent sub-pixel 200, so that the display color cast is avoided, and the light purity is reduced. Therefore, the arrangement of the light reflecting layer 400 and the light guide-out layer 600 can improve the light guide-out rate of the light emitted by the sub-pixels of the display panel, improve the display brightness of the display panel, reduce the light mixing of different colors of light among different sub-pixels, avoid the occurrence of display color cast of the display panel, and improve the light purity of the display panel.

Illustratively, the light shielding structure 300 may employ a black polyimide material. After the light shielding structure 300 is manufactured, a light reflecting layer 400 may be formed on the surface of the light shielding structure 300 by metal sputtering or evaporation, and the light reflecting layer 400 may include metal such as Al, ag, and the like. A reflection increasing film may also be directly attached to the surface of the light-shielding structure 300 to form the light reflection layer 400. The light guide-out layer 600 may be formed between the adjacent light blocking structures 300 using a printing technique, and the light guide-out layer 600 may use an inorganic material having a high transmittance.

Illustratively, the light extraction rate of the display panel provided with the light reflection layer 400 and the light extraction layer 600 may reach 85%.

It should be noted that, the size of the light shielding structure 300 may include thickness, sidewall slope angle and occupied area, which all affect the light output amount, and the size may be specifically set according to the product specification requirement of the display panel, which is not specifically limited in the embodiment of the present application.

In some embodiments, fig. 2 is a schematic structural diagram of another display panel provided in an example of the present application. As shown in fig. 2, the display panel further includes a filter layer 700, wherein the filter layer 700 is disposed between adjacent light-shielding structures 300; the orthographic projection of the sub-pixels 200 on the first substrate layer 100 falls into the orthographic projection of the filter layer 700 on the first substrate layer 100, and the color of light transmitted by the filter layer 700 is the same as that of light emitted by the corresponding sub-pixels; the orthographic projection of the sub-pixel 200 on the first substrate layer 100 falls on the orthographic projection of the light guide layer 600 on the first substrate layer 100. Then, the sub-pixels 200, the light guide-out layer 600, and the filter layer 700 are disposed correspondingly in the thickness direction of the display panel.

Illustratively, as shown in fig. 2, a red filter layer R, a green filter layer G, and a blue filter layer B may be provided corresponding to the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B.

The display panel provided by the embodiment of the application sets up the filter layer 700 of corresponding colour at the light-emitting side of sub-pixel 200, can further play the effect that improves the colour purity of display light, reduces and shows colour cast effect, improves the display effect.

In some embodiments, as shown in fig. 2, the filter layer 700 is disposed on a side of the light guiding layer 600 away from the first substrate layer 100, and can further filter light emitted through the light guiding layer 600, so as to improve color purity of the light.

In some embodiments, the filter layer 700 may be further disposed between the sub-pixel 200 and the light guide-out layer 600, and may filter the light emitted from the sub-pixel 200 first and then guide out the filtered light, without affecting the light guide-out rate.

In some embodiments, the display panel further includes: the second substrate layer is arranged between the sub-pixels and the light guide-out layer, and the refractive index of the second substrate layer is smaller than that of the light guide-out layer; the packaging layer is arranged between the sub-pixels and the second substrate layer, and the refractive index of the second substrate layer is larger than that of the packaging layer.

For example, fig. 3 is a schematic structural diagram of another display panel provided in an embodiment of the present application. As shown in fig. 3, the encapsulation layer 800 may protect the sub-pixels 200, the second substrate layer 900 may have a flat film structure, and the second substrate layer 900 may further enable the films above the second substrate layer 900 to be attached to the encapsulation layer 800 after being separately prepared, so that different preparation methods of the display panel may be implemented, and the production efficiency of the display panel may be improved. The second substrate layer 900 may be the same as the first substrate layer 100, and embodiments of the present application are not limited in particular. The first substrate layer 100 may be a rigid substrate or a flexible substrate, and the embodiment of the present application is not limited in particular. In case the first substrate layer 100 comprises a flexible substrate layer, a rigid substrate may be arranged below the first substrate layer 100, which substrate is peeled off after the preparation of the display panel is completed.

Referring to fig. 3, the refractive index of the second substrate layer 900 is greater than the refractive index of the encapsulation layer 800, and then the light rays emitted by the sub-pixels after being refracted at the interface between the encapsulation layer 800 and the second substrate layer 900 are shown as a converged light path, so that the light rays emitted from a large viewing angle can be converged toward a front viewing angle, and the light guide efficiency of the display panel can be improved. The refractive index of the second substrate layer 900 is smaller than that of the light guide-out layer 600, and the light guide-out layer can also play a role in converging light, so that the light guide-out rate can be further improved.

In some embodiments, light rays with an exit angle larger than a first angle, which are emitted from the center of a light-emitting area formed corresponding to a sub-pixel, are shielded by a light-shielding structure, and the exit angle is an included angle between the light rays and a direction perpendicular to a plane where the first substrate layer is located; the magnitude of the first angle is inversely related to the vertical distance between the light shielding structure and the sub-pixel. The light rays with the emergence angle smaller than the first angle and larger than the second angle, which are emitted from the center position of the light emergence region formed corresponding to the sub-pixels, are reflected by the light reflection layer and then are emergent; the second angle is smaller than the first angle, and the size of the second angle is inversely related to the vertical distance between the shading structure and the sub-pixel. And light rays with the emergent angle smaller than the second angle emitted from the center position of the light emergent area correspondingly formed by the sub-pixels are emergent through the light guide layer.

For example, referring to fig. 3, the first light L1 directly exits through the light guiding layer 600, the second light L2 exits through the light guiding layer 600 and then reflects through the light reflecting layer 400, and the third light L3 is shielded by the light shielding structure 300 and does not exit. And the normal W is a line perpendicular to the plane of the first substrate layer, and the included angle between the light ray and the normal W is an emergent angle. The emergent angle corresponding to the first light ray L1 is c, the emergent angle corresponding to the second light ray L2 is b, the emergent angle corresponding to the third light ray L3 is a, and a is more than b and more than c. The critical boundary angle between the second light L2 and the third light L3 is a first angle, the light having an exit angle larger than the first angle becomes the third light L3, the light having an exit angle between the first angle and the second angle becomes the second light L2, the critical boundary angle between the first light L1 and the second light L2 is a second angle, and the light having an exit angle smaller than the second angle becomes the first light L1. The light ray having the exit angle equal to the first angle may become the second light ray L2 or the third light ray, and the light ray having the exit angle equal to the second angle may become the second light ray L2 or the first light ray L1. Illustratively, the first angle may be 70 °, 80 °, or 85 °, and the second angle may be 45 °, or 50 °. The third light L3 is shielded or absorbed by the light shielding structure 300, so that the third light L3 emitted from the large viewing angle and the third light emitted from the adjacent sub-pixels can be prevented from mixing, the color shift of the large viewing angle can be improved, and the color purity of the large viewing angle of the display panel can be improved. In fig. 3, m is a center position of the light emitting region formed by the sub-pixel 200.

Illustratively, the first angle is 80 ° and the second angle is 50 °. The first light ray L1 exists, the exit angle is small, about 0 to 50 °, and the exit angle is not 0 °, and after being refracted by the second substrate layer 900, the first light ray L is not perpendicular to the second substrate layer 900 in a plane. L1 is refracted by the second substrate layer 900 and the light guide layer 600, and then emitted through the light guide layer 600. The second light L2 exists, the exit angle of the second light L2 is about 50 to 80 °, and the second light L2 is refracted by the second substrate layer 900 and the light guiding layer 600, reflected by the light reflecting layer 400, re-enters the light guiding layer 600, and finally exits. After re-entering the light guiding layer 600 after being reflected by the light reflecting layer 400, a part of L2 is reflected by the light reflecting layer 400 for many times and finally emitted. Light rays are emitted from the light emitting layer, and part of the light rays L3 with the outgoing angle larger than 80 degrees exist, and after being refracted by the second substrate layer 900, the L3 reaches the bottom of the light shielding structure 300 and is absorbed by the light shielding structure 300. And the crosstalk of light rays emitted between adjacent sub-pixels is avoided, and color mixing is avoided.

Illustratively, the first angle is 70 ° and the second angle is 45 °. The first light L1 exists, the exit angle is small, about 0 to 45 °, and the exit angle is not 0 °, and after being refracted by the second substrate layer 900, the first light L is not perpendicular to the second substrate layer 900 in a plane. L1 is refracted by the second substrate layer 900 and the light guide layer 600, and then emitted through the light guide layer 600. The second light L2 exists, the exit angle of the second light L2 is about 45 to 70 °, and the second light L2 is refracted by the second substrate layer 900 and the light guiding layer 600, reflected by the light reflecting layer 400, re-enters the light guiding layer 600, and finally exits. After re-entering the light guiding layer 600 after being reflected by the light reflecting layer 400, the part L2 is reflected by the light reflecting layer 400 for many times and finally emitted. Light rays are emitted from the light emitting layer, and part of the light rays L3 with the outgoing angle larger than 70 degrees exist, and after being refracted by the second substrate layer 900, the L3 reaches the bottom of the light shielding structure 300 and is absorbed by the light shielding structure 300. And the crosstalk of light rays emitted between adjacent sub-pixels is avoided, and color mixing is avoided.

Illustratively, the size of the first angle is inversely related to the vertical distance between the light shielding structure and the sub-pixel, that is, the thickness of the second substrate layer 900 may be reduced to increase the value of the first angle, so as to further increase the quantity of emergent light, thereby achieving the effect of improving the light guiding efficiency. Similarly, by decreasing the thickness of the second substrate layer 900, the size of the second angle can be increased, and the light guiding efficiency can also be improved.

In some embodiments, the ratio of the refractive index of the second substrate layer 900 to the refractive index of the encapsulation layer 800 ranges from 1.05 to 1.5. The ratio of the refractive index of the light guide-out layer 600 to the refractive index of the second substrate layer 900 ranges from 1.05 to 1.5.

In some embodiments, as shown in fig. 3, the sub-pixel 200 includes a first electrode 210, a light emitting layer 230, and a second electrode 220, the light emitting layer 230 being disposed between the first electrode 210 and the second electrode 220; the first electrode 210 is disposed between the first substrate layer 100 and the pixel defining structure 500, the light emitting layer 230 is disposed between adjacent pixel defining structures 500, and the second electrode 220 covers the light emitting layer 230 and the pixel defining structures 500.

For example, fig. 4 is a schematic film structure diagram of a sub-pixel provided in an embodiment of the present application. As shown in fig. 4, the light emitting layer 230 may further include a hole injection layer 231, a hole transport layer 232, a light emitting material 233, an electron transport layer 234, and an electron injection layer 235, the first electrode 210 may be an anode, the second electrode 220 may be a cathode, and an electric field is applied to the first electrode 210 and the second electrode 220, so that the light emitting material 233 is excited to emit a color corresponding to the material, and a sub-pixel that emits light actively may be obtained.

The display panel shown in fig. 3 adopts an active light emission type display mode. In some embodiments, the display panel may further include: the liquid crystal layer is arranged between the sub-pixel 200 and the shading structure 300; the sub-pixels include pixel electrodes. The pixel electrode can drive liquid crystal molecules of the liquid crystal layer to turn over, the light transmittance of the sub-pixels can be controlled, the transmitted light can be used for picture display, and a passive light emitting display mode can be realized by utilizing a backlight source. The embodiment of the application can be suitable for the display panel of the active light-emitting mode and the liquid crystal display panel of the passive light-emitting mode for improving the light guide rate.

In some embodiments, the first substrate layer 100 includes a pixel driving circuit, which is electrically connected to the sub-pixels. The first substrate layer 100 may include a substrate material, and a pixel driving circuit may be disposed between the substrate material and the sub-pixel, and the pixel driving circuit may include a thin film transistor, and the driving circuit is required to provide a driving signal for either the light emitting device or the pixel electrode, which is not particularly limited in this embodiment of the application.

For example, fig. 5 is a schematic structural diagram of another display panel provided in an embodiment of the present application. As shown in fig. 5, the refractive index of the second substrate layer 900 may be greater than the refractive index of the light guiding layer 600, and the fourth light L4 and the fifth light L5 diverge at the interface between the second substrate layer 900 and the light guiding layer 600, so that more light is irradiated on the light reflecting layer 400, and more light is reflected by the light reflecting layer 400 and then emitted, which may also have the effect of further improving the light guiding rate.

For example, fig. 6 is a schematic structural diagram of a display panel provided in an embodiment of the present application. As shown in fig. 6, the filter layer 700 is arranged between the second substrate layer 900 and the light out-guiding layer 600, the light out-guiding layer 600 covering a side of the light shielding structure 300 facing away from the first substrate layer 100. Due to the arrangement of the light shielding structure 300, the color purity is not affected even when the light guiding layer 600 is arranged in the whole layer, and the function of flattening the film layer can be achieved.

For example, fig. 7 is a schematic partial structure diagram of a display panel provided in an embodiment of the present application. As shown in fig. 7, illustrating an arrangement of the red filter layer r, the green filter layer g and the blue filter layer b, the light reflective layer 400 is disposed on the hollow sidewall of the light shielding structure 300 and surrounds the filter layers. It should be noted that the red filter layer R, the green filter layer G, and the blue filter layer B correspond to the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B, respectively, and the sub-pixels are not shown in fig. 7 due to the shielding of the filter layers.

For example, fig. 8 is a schematic partial structure diagram of another display panel provided in an embodiment of the present application. As shown in fig. 8, the filter layer further includes a white filter layer w, the white filter layer w corresponds to a white sub-pixel, and the red sub-pixel, the green sub-pixel, the blue sub-pixel and the white sub-pixel may form a pixel unit, which may satisfy different display chromaticity requirements.

It should be noted that the pixel arrangement and color combination shown in fig. 7 and 8 are only schematic and are not intended to limit the present application in detail.

In a second aspect of the embodiments of the present application, a display device is provided, and fig. 7 is a schematic structural diagram of the display device provided in the embodiments of the present application. As shown in fig. 7, the display device includes: the display panel 1000 according to the first aspect.

It should be noted that the display device provided in the embodiment of the present application may include a display such as a smart phone, a notebook computer, a tablet computer, and a television.

According to the display device provided by the embodiment of the application, the light guide rate of the sub-pixel emission can be enhanced by arranging the light guide layer on the display panel; the light emitted by the large angle can be reflected and then emitted by the light reflection layer, so that the effect of relatively converging the light can be achieved, and the light can be converged towards the front view angle of the display panel. The light reflection layer is arranged on the side wall of the shading structure in the thickness direction, and can reflect the light irradiated on the side wall of the shading structure for wide-angle outgoing to the direction outgoing which tends to the normal viewing angle, so that on one hand, the light guide output rate can be improved, the light waste caused by the absorption or shielding of the shading structure for the wide-angle outgoing light is reduced, the drive power consumption of the display panel is not influenced, and even the drive power consumption can be reduced under the condition of higher light guide output rate. On the other hand, the light emitted at a large angle and the light emitted at a large angle of the adjacent sub-pixels can be prevented from mixing, so that the display color cast is avoided, and the light purity is reduced. Therefore, the arrangement of the light reflection layer and the light guide-out layer can improve the light guide-out rate of the light emitted by the sub-pixels of the display panel, improve the display brightness of the display panel, reduce the mixed light of different colors of light among different sub-pixels, avoid the occurrence of display color cast of the display panel and improve the light purity of the display panel.

It should be noted that, in the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to relevant descriptions of other embodiments for parts that are not described in detail in a certain embodiment.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

While preferred embodiments of the present specification have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all changes and modifications that fall within the scope of the specification.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present specification without departing from the spirit and scope of the specification. Thus, if such modifications and variations of the present specification fall within the scope of the claims of the present specification and their equivalents, then such modifications and variations are also intended to be included in the present specification.

Claims (15)

1. A display panel, comprising:

a first substrate layer;

the plurality of sub-pixels are arranged on one side of the first substrate layer, and a pixel defining structure is arranged between every two adjacent sub-pixels;

the shading structures are arranged on one side, away from the first substrate layer, of the sub-pixels, light guide layers are arranged between the adjacent shading structures, and the orthographic projection of the shading structures on the first substrate layer falls into the orthographic projection of the pixel defining structures on the first substrate layer;

and the light reflection layer is arranged on the side wall of the shading structure in the thickness direction.

2. The display panel according to claim 1, further comprising:

the filter layer is arranged between the adjacent shading structures;

the orthographic projection of the sub-pixels on the first substrate layer falls into the orthographic projection of the filter layer on the first substrate layer;

the orthographic projection of the sub-pixels on the first substrate layer falls within the orthographic projection of the light-deriving layer on the first substrate layer.

3. The display panel according to claim 2,

the filter layer is arranged on one side, far away from the first substrate layer, of the light guide-out layer, and/or the filter layer is arranged between the sub-pixels and the light guide-out layer.

4. The display panel according to claim 1, further comprising:

a second substrate layer disposed between the sub-pixels and the light-deriving layer;

the second substrate layer has a refractive index less than the refractive index of the light-deriving layer.

5. The display panel according to claim 4, further comprising:

an encapsulation layer disposed between the subpixels and the second substrate layer;

the refractive index of the second substrate layer is greater than the refractive index of the encapsulation layer.

6. The display panel according to claim 5,

the ratio of the refractive index of the second substrate layer to the refractive index of the encapsulation layer ranges from 1.05 to 1.5; and/or the presence of a gas in the atmosphere,

the ratio of the refractive index of the light-deriving layer to the refractive index of the second substrate layer ranges from 1.05 to 1.5.

7. The display panel according to claim 1,

the light guide-out layer covers one side, far away from the first substrate layer, of the shading structure.

8. The display panel according to claim 1,

light rays with an emergence angle larger than a first angle, which are emitted from the center position of a light-emitting area formed by the sub-pixels correspondingly, are shielded by the light shielding structure, and the emergence angle is an included angle between the light rays and a direction perpendicular to the plane of the first substrate layer;

the size of the first angle is inversely related to the vertical distance between the light shielding structure and the sub-pixel.

9. The display panel according to claim 8,

the light rays with the emergence angle smaller than the first angle and larger than the second angle, which are emitted from the center position of the light emergence region formed corresponding to the sub-pixel, are reflected by the light reflection layer and then are emergent;

the second angle is smaller than the first angle, and the size of the second angle is in negative correlation with the vertical distance between the light shielding structure and the sub-pixel.

10. The display panel according to claim 9,

and light rays with the outgoing angle smaller than the second angle, which are emitted from the center position of the light outgoing area formed corresponding to the sub-pixel, are emitted through the light outgoing layer.

11. The display panel according to claim 10,

the first angle ranges from 70 ° to 85 °; and/or the presence of a gas in the gas,

the second angle is in the range of 40 ° to 50 °.

12. The display panel according to claim 1,

the sub-pixel comprises a first electrode, a light-emitting layer and a second electrode, wherein the light-emitting layer is arranged between the first electrode and the second electrode;

the first electrode is disposed between the first substrate layer and the pixel defining structures, the light emitting layer is disposed between adjacent pixel defining structures, and the second electrode covers the light emitting layer and the pixel defining structures.

13. The display panel according to claim 1, further comprising:

the liquid crystal layer is arranged between the sub-pixels and the shading structure;

the sub-pixels include pixel electrodes.

14. The display panel according to claim 1,

the first substrate layer includes a pixel drive circuit electrically connected to the sub-pixels.

15. A display device, comprising:

the display panel of any one of claims 1-14.

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