Display panel and display equipment

Abstract

The display panel comprises a display substrate, a black matrix layer, an auxiliary part and a flat layer, the auxiliary part at least covers the side wall of a first opening, the auxiliary part comprises at least one auxiliary layer, each auxiliary layer is provided with a hollowed-out opening, and the hollowed-out opening is formed in the side wall of the first opening. The hollowed-out opening is formed in the area of the first opening, and the hollowed-out opening is filled with the flat layer. The auxiliary part contacts with the flat layer to form a total reflection interface. According to the embodiment of the invention, the auxiliary part covers the side wall of the first opening, so that the contact interface of the auxiliary part and the flat layer forms the total reflection interface, and at the moment, large-angle external light is radiated to the total reflection interface and is reflected to the first opening by the total reflection interface, and cannot be absorbed by the black matrix layer and / or refracted out of the first opening; therefore, the transmittance of external light penetrating through the first opening is improved.

Description

TECHNICAL FIELD

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

[0002] POL Less is an innovative technology that uses a black matrix layer in combination with a color filter layer to replace traditional polarizing plates to improve the performance of display panels. The core of this technology is to reduce light loss and lower power consumption by optimizing the optical structure.

[0003] In under-screen photosensitive technology, an opening is usually provided in the black matrix layer corresponding to the non-pixel area, so that light can enter from the opening to reach the under-screen photosensitive module.

[0004] In the process of research and practice of the prior art, the inventors of the present application found that, as shown in Figure 1 When external light is radiated to the opening sidewall of the black matrix layer BM, refraction occurs, causing part of the light to be absorbed by the black matrix layer BM and part of the light to avoid the photosensitive module Sn, so that most of the light is not sensed by the photosensitive module Sn, resulting in insufficient light available to the under-screen photosensitive module Sn. SUMMARY

[0005] The embodiments of the present application provide a display panel and a display device, which can improve the transmittance of external light at the first opening of the black matrix layer.

[0006] The embodiments of the present application provide a display panel, which comprises:

[0007] A display substrate comprising a photosensitive region configured to transmit external light;

[0008] A black matrix layer disposed on the light-out side of the display substrate, the black matrix layer being provided with a first opening, the first opening being disposed in the photosensitive region;

[0009] An auxiliary portion covering at least the sidewall of the first opening, the auxiliary portion comprising at least one auxiliary layer, each auxiliary layer being provided with a hollow opening, the hollow opening being disposed in the region of the first opening;

[0010] A planar layer covering the side of the black matrix layer and the auxiliary portion away from the display substrate, the planar layer filling the hollow opening;

[0011] Wherein, the contact interface between the auxiliary portion and the planar layer is a total reflection interface.

[0012] Optionally, in some embodiments of the present application, the auxiliary part only includes one auxiliary layer, the auxiliary layer covers at least the sidewall of the first opening, the hollow opening penetrates through the auxiliary layer, the auxiliary layer has a refractive index less than that of the flat layer, and the auxiliary layer and the flat layer contact to form the total reflection interface.

[0013] Optionally, in some embodiments of the present application, the auxiliary layer also covers the side surface of the black matrix layer away from the display substrate.

[0014] Optionally, in some embodiments of the present application, the black matrix layer is provided with a second opening, one second opening corresponds to one sub-pixel of the display substrate, and the display panel further includes a light filtering structure layer, the light filtering structure layer includes a first light filtering part, and one first light filtering part is arranged in one second opening.

[0015] The thickness of the first light filtering part is greater than or equal to the depth of the second opening, and the first light filtering part is integrally connected with the auxiliary layer.

[0016] Optionally, in some embodiments of the present application, the width of the hollow opening is equal to the width of the first opening.

[0017] Optionally, in some embodiments of the present application, the auxiliary part includes at least two auxiliary layers, the at least two auxiliary layers are stacked and cover at least the sidewall of the first opening, in any two adjacent auxiliary layers, the hollow opening opened in the auxiliary layer away from the black matrix layer is arranged in the region of the hollow opening opened in the auxiliary layer close to the black matrix layer.

[0018] The auxiliary layer farthest from the black matrix layer has a refractive index less than that of the flat layer, and the auxiliary layer farthest from the black matrix layer and the flat layer contact to form the total reflection interface.

[0019] Optionally, in some embodiments of the present application, in any two adjacent auxiliary layers, the sidewall slope angle of the hollow opening opened in the auxiliary layer away from the black matrix layer is greater than the sidewall slope angle of the hollow opening opened in the auxiliary layer close to the black matrix layer.

[0020] Optionally, in some embodiments of the present application, each auxiliary layer extends to cover the side of the black matrix layer away from the display substrate.

[0021] Optionally, in some embodiments of the present application, the black matrix layer is provided with a second opening, a third opening and a fourth opening, one of the second openings corresponds to the first sub-pixel of the display substrate, one of the third openings corresponds to the second sub-pixel of the display substrate, and one of the fourth openings corresponds to the third sub-pixel of the display substrate; the display panel further comprises a light filtering structure layer, the light filtering structure layer comprises a first light filtering part, a second light filtering part and a third light filtering part, the first light filtering part is arranged in the second opening, the second light filtering part is arranged in the third opening, and the third light filtering part is arranged in the fourth opening.

[0022] The thickness of the first light filtering part is greater than or equal to the depth of the second opening, the thickness of the second light filtering part is greater than the depth of the third opening, and the thickness of the third light filtering part is greater than or equal to the depth of the fourth opening.

[0023] The number of the auxiliary layers is less than or equal to three, and one of the auxiliary layers is integrally connected to one of the first light filtering part, the second light filtering part and the third light filtering part.

[0024] Optionally, in some embodiments of the present application, the slope angle of the sidewall of the hollowed-out opening of the auxiliary layer in contact with the flat layer is between 45 degrees and 65 degrees.

[0025] Optionally, in some embodiments of the present application, the display panel further comprises a light filtering structure layer, and the auxiliary part is formed in the light filtering structure layer.

[0026] Correspondingly, the present application also provides a display device comprising a photosensitive module and the display panel of any one of the above embodiments, and the photosensitive module is arranged on the backlight side of the display panel and corresponds to the photosensitive area.

[0027] The display panel of the present application comprises a display substrate, a black matrix layer, an auxiliary part and a flat layer, and the display substrate comprises a photosensitive area. The first opening of the black matrix layer is arranged in the photosensitive area; the auxiliary part covers at least the sidewall of the first opening, the auxiliary part comprises at least one auxiliary layer, each auxiliary layer is provided with a hollowed-out opening, the hollowed-out opening is arranged in the area of the first opening, and the flat layer fills the hollowed-out opening. The contact interface of the auxiliary part and the flat layer is a total reflection interface, and the flat layer contacts to form a total reflection interface.

[0028] It can be understood that, in the present application, the auxiliary part covers the sidewall of the first opening, so that the contact interface of the auxiliary part and the flat layer forms a total reflection interface. At this time, the external light of a large angle is radiated to the total reflection interface and is reflected to the first opening by the total reflection interface, without being absorbed and / or refracted out of the first opening by the black matrix, thereby improving the transmittance of the external light through the first opening. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic diagram of a display module of related technology;

[0030] Figure 2 is a top view schematic diagram of a display panel provided by an embodiment of the present application;

[0031] Figure 3 is a cross-sectional structural schematic diagram along the MN line of Figure 2

[0032] Figure 4 is an enlarged schematic diagram of the p1 part of Figure 3

[0033] Figure 5 is another cross-sectional structural schematic diagram along the MN line of Figure 2

[0034] Figure 6 is an enlarged schematic diagram of the p2 part of Figure 5

[0035] Figure 7 is still another cross-sectional structural schematic diagram along the MN line of Figure 2

[0036] Figure 8 is an enlarged schematic diagram of the p3 part of Figure 7

[0037] Figure 9 is a structural schematic diagram of a display device provided by an embodiment of the present application.

[0038] BRIEF DESCRIPTION OF DRAWINGS

[0039] Display device 1000; photosensitive module 200; display panel 100; display substrate 11; black matrix layer 12; filter structure layer 13; planarization layer 14; photosensitive area SS; first opening 12a; auxiliary part 131; filter part 132; auxiliary layer 3a; hollow 3c; pixel opening 2a; first filter part 13r; second filter part 13g; third filter part 13b; second opening 2a2; third opening 2a3; fourth opening 2a4; first auxiliary layer 3a1; second auxiliary layer 3a2; third auxiliary layer 3a3; first hollow 3c1; second hollow 3c2; third hollow 3c3. DETAILED DESCRIPTION

[0040] ​​​​​​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of the present application. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the present application, and is not used to limit the present application. In the present application, the embodiments can be combined with each other but are not described one by one, and the positional words such as "upper" and "lower" are used to refer to the upper and lower of the device in the actual use or working state, and the specific is the direction of the drawing surface in the drawing; and "inner" and "outer" are used to refer to the contour of the device; the words "first", "second", "third" and the like are only used as labels, and do not impose numerical requirements or establish sequences.

[0041] The present application provides a display panel and a display device, which are described in detail below. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments.

[0042] Please refer to Figure 2 and Figure 3 The present application provides a display panel 100, which includes a display substrate 11, a black matrix layer 12, an auxiliary part 131, a filter structure layer 13 and a planar layer 14.

[0043] The display substrate 11 includes a photosensitive area SS, and the photosensitive area SS is configured to transmit external light.

[0044] The black matrix layer 12 is arranged on the light-emitting side of the display substrate 11. The black matrix layer 12 is provided with a first opening 12a, and the first opening 12a is arranged in the photosensitive area SS.

[0045] The auxiliary part 131 covers at least the sidewall of the first opening 12a. The auxiliary part 131 includes at least one auxiliary layer 3a, and each auxiliary layer 3a is provided with a hollow opening 3c arranged in the area of the first opening 12a. The planar layer 14 covers the side of the black matrix layer 12 and the auxiliary part 131 away from the display substrate 11, and the planar layer 14 fills the hollow opening 3c.

[0046] The contact interface between the auxiliary part 131 and the planar layer 14 is a total reflection interface.

[0047] It can be understood that the display panel 100 of the embodiment of the present application covers the sidewall of the first opening 12a with the auxiliary part 131, so that the contact interface between the auxiliary part 131 and the flat layer 14 forms a total reflection interface. At this time, the external light with a large angle is radiated to the total reflection interface and reflected to the first opening 12a by the total reflection interface, and will not be absorbed and / or refracted out of the first opening 12a by the black matrix layer 12, thereby improving the transmittance of the external light through the first opening 12a, and further improving the photosensitive capability of the photosensitive module.

[0048] Optionally, the photosensitive area SS is arranged in the display area. A plurality of first openings 12a are arranged in one photosensitive area SS.

[0049] Optionally, the display substrate 11 can be an electroluminescent display substrate, which can be an organic light-emitting display substrate, a quantum dot light-emitting display substrate, or an inorganic light-emitting display substrate.

[0050] Taking the organic light-emitting display substrate as an example, the display substrate 11 includes a driving circuit structure layer, an organic light-emitting layer, and an encapsulation layer. The organic sub-pixel layer is arranged on the driving circuit structure layer, and the encapsulation layer is encapsulated on the light-emitting side of the organic light-emitting layer. The driving circuit structure layer includes a pixel circuit, and the organic light-emitting layer includes a plurality of sub-pixels, such as red light sub-pixels, green light sub-pixels, and blue light sub-pixels.

[0051] Optionally, one sub-pixel is connected to one pixel circuit. The pixel circuit can be one of a 7T1C, 6T1C, 3T1C, and 8T2C pixel circuit, and the present application does not make any limitation as long as it can drive the sub-pixel to emit light.

[0052] The sub-pixel includes an anode, an organic light-emitting layer, and a cathode. In some embodiments, the sub-pixel further includes a hole injection layer, a hole transport layer, an electron injection layer, and a hole transport layer. The hole injection layer and the hole transport layer are arranged between the organic light-emitting layer and the anode, and the electron injection layer and the hole transport layer are arranged between the organic light-emitting layer and the cathode. However, it is not limited thereto. For example, the sub-pixel can be a single-layer light-emitting layer architecture, or a double-layer light-emitting layer architecture.

[0053] Optionally, in some embodiments, the display substrate 11 can further include a touch structure layer configured to realize a touch function. The touch structure layer is formed on a layer of the encapsulation layer away from the light-emitting device layer. The touch structure layer includes a touch electrode and a touch line connected to the touch electrode. The touch electrode and the touch line are arranged away from the sub-pixel to avoid shielding the sub-pixel.

[0054] The black matrix layer 12 is provided with a plurality of pixel openings 2a. The pixel opening 2a of the black matrix layer 12 is opposite to the sub-pixel, so that the light emitted by the sub-pixel can pass through the pixel opening 2a to realize display. Secondly, the black matrix layer 12 covers the wiring to shield the wiring and improve the appearance and display contrast.

[0055] Optionally, in some embodiments, the auxiliary part 131 is formed in the light filtering structure layer 13. However, it is not limited thereto. For example, the auxiliary part 131 can be additionally prepared by a mask process, and the material of the auxiliary part 131 is different from the material of the light filtering structure layer 13.

[0056] The auxiliary part 131 is formed in the light filtering structure layer 13 to save the mask process. In addition, based on the light absorption of the material of the light filtering structure layer 13, the external light reflectivity of the display panel 100 can be reduced. Hereinafter, the auxiliary part 131 formed in the light filtering structure layer 13 is taken as an example for illustration.

[0057] In some embodiments of the present application, the light filtering structure layer 13 further comprises a light filtering part 132. One light filtering part 132 is arranged in one pixel opening 2a. The light filtering part 132 is configured to filter the light emitted by the sub-pixel.

[0058] The light filtering part 132 is provided in each pixel opening 2a.

[0059] Optionally, in some embodiments, the plurality of light filtering parts 132 can be light filtering parts 132 of multiple colors. The color of the light filtering part 132 corresponds to and is consistent with the light emitting color of the sub-pixel.

[0060] Optionally, in some embodiments, the plurality of light filtering parts 132 comprises a first light filtering part 13r, a second light filtering part 13g and a third light filtering part 13b. The plurality of pixel openings 2a comprises a second opening 2a2, a third opening 2a3 and a fourth opening 2a4. The first light filtering part 13r is arranged in the second opening 2a2, the second light filtering part 13g is arranged in the third opening 2a3, and the third light filtering part 13b is arranged in the fourth opening 2a4.

[0061] The colors of the first light filtering part 13r, the second light filtering part 13g and the third light filtering part 13b are different to realize different color light transmission. That is, the types of the light filtering parts 132 are related to and consistent with the types of the light emitting colors of the actual sub-pixels. For example, three color lights correspond to three types of light filtering parts 132, and four color lights correspond to four types of light filtering parts 132.

[0062] Optionally, in some embodiments, the first filter part 13r is a red filter part to absorb green light and blue light and transmit red light. The second filter part 13g is a green filter part to absorb red light and blue light and transmit green light. The third filter part 13b is a blue filter part to absorb green light and red light and transmit blue light. However, it is not limited to this, for example, the first filter part 13r is a green filter part, the second filter part 13g is a blue filter part, and the color of the third filter part 13b is a red filter part; or, the first filter part 13r is a blue filter part, the second filter part 13g is a red filter part, and the color of the third filter part 13b is a green filter part.

[0063] The first filter part 13r corresponds to a red light sub-pixel, the second filter part 13g corresponds to a green light sub-pixel, and the third filter part 13b corresponds to a blue light sub-pixel.

[0064] It can be understood that the display panel 100 of the embodiment of the present application adopts the black matrix layer 12 in combination with the filter structure layer 13 to replace the polarizing sheet, which can reduce the thickness of the display panel 100.

[0065] Optionally, in some embodiments of the present application, please refer to Figure 2 and Figure 3 The auxiliary part 131 only includes an auxiliary layer 3a. The auxiliary layer 3a covers at least the sidewall of the first opening 12a. The hollow part 3c penetrates through the auxiliary layer 3a. The refractive index of the auxiliary layer 3a is less than the refractive index of the flat layer 14. The auxiliary layer 3a and the flat layer 14 contact to form the total reflection interface.

[0066] It can be understood that the auxiliary part 131 only includes an auxiliary layer 3a, so that the structure of the auxiliary part 131 is relatively simple, and it is also convenient to control the size of the hollow part 3c of the auxiliary part 131, thereby reducing the risk that the auxiliary layer 3a extends into the bottom opening end of the first opening 12a and reduces the effective opening area of the first opening 12a.

[0067] Optionally, the planar shape of the pixel opening 2a and the hollow part 3c can be circular, but is not limited to this, for example, it can be rectangular or rhombic, etc. Among them, the shape of the pixel opening 2a is the same as the shape of the hollow part 3c corresponding to it, for example, both are circular.

[0068] Optionally, the auxiliary layer 3a of the auxiliary part 131 can be formed in the same mask process as one of the first filter part 13r, the second filter part 13g, and the third filter part 13b. The material of the auxiliary part 131 can be the same as one of the first filter part 13r, the second filter part 13g, and the third filter part 13b.

[0069] Therefore, the auxiliary part 131 also has the function of absorbing external light. When the light with a small angle is radiated to the total reflection interface, part of the light will enter the auxiliary part 131 and be absorbed by the auxiliary part 131, so as to reduce the reflectivity.

[0070] Optionally, in some embodiments of the present application, the width of the hollow opening 3c is equal to the width of the first opening 12a.

[0071] It can be understood that the width of the hollow opening 3c is equal to the width of the first opening 12a, that is, the size of the bottom opening end of the hollow opening 3c is the same as the size of the bottom opening end of the first opening 12a, so as to avoid the risk of reducing the effective opening area of the first opening 12a, thereby ensuring a larger light entering area.

[0072] The hollow opening 3c can be formed by patterning through photolithography.

[0073] Optionally, in some embodiments of the present application, the auxiliary layer 3a also covers the side surface of the black matrix layer 12 away from the display substrate 11.

[0074] It can be understood that the auxiliary layer 3a also covers the surface of the black matrix layer 12, so that the black matrix layer 12 and the auxiliary part 131 form a light-absorbing stacked structure. Although the contact surface of the auxiliary part 131 and the flat layer 14 is a total reflection surface, under the small angle view of the display panel 100, the external light with a small angle will be absorbed by the auxiliary part 131 and the black matrix layer 12, thereby reducing the reflectivity of the small angle view.

[0075] Optionally, in some embodiments of the present application, a second opening 2a2 corresponds to a sub-pixel of the display substrate 11. The light filtering structure layer 13 includes a first light filtering part 13r, and the first light filtering part 13r is arranged in the second opening 2a2. The thickness of the first light filtering part 13r is greater than or equal to the depth of the second opening 2a2, and the first light filtering part 13r is integrally connected with the auxiliary layer 3a.

[0076] It can be understood that the first light filtering part 13r and the auxiliary layer 3a are made of the same material and are formed by the same mask. In the process, the two are formed in the black matrix layer 12 by coating. Based on the leveling property of the organic material, the thickness of the organic material needs to be greater than or equal to the depth of the second opening 2a2, so that the auxiliary layer 3a fully covers the sidewall of the first opening 12a, so that the area of the total reflection interface is maximized, thereby increasing the probability of reflecting external light into the first opening 12a, thereby increasing the light transmittance of the first opening 12a, and thereby improving the light sensing capability of the light sensing module.

[0077] Secondly, the first light filtering part 13r is integrally connected with the auxiliary layer 3a, so that the first light filtering part 13r and the auxiliary layer 3a have continuity, the area of the two covering the black matrix layer 12 is increased, and the reflectivity of the small-angle external light is reduced.

[0078] Optionally, the thickness of the first light filtering part 13r is greater than the depth of the first opening 12a of the black matrix layer 12, so as to improve the continuity of the connection between the first light filtering part 13r and the auxiliary layer 3a.

[0079] Optionally, the thickness of the black matrix layer 12 is between 1 micrometer and 3 micrometers, for example, 1 micrometer, 1.5 micrometers, 2 micrometers, 2.5 micrometers, or 3 micrometers.

[0080] The thickness of the light filtering part 132 can be between 2 micrometers and 4 micrometers. For example, the thickness of the first light filtering part 13r can be between 2 micrometers and 4 micrometers, for example, 2 micrometers, 2.5 micrometers, 3 micrometers, 3.5 micrometers, or 4 micrometers.

[0081] Optionally, in some embodiments of the present application, the side wall slope angle α of the hollowed-out opening 3c of the auxiliary layer 3a in contact with the flat layer 14 is between 45 degrees and 65 degrees.

[0082] It can be understood that the side wall slope angle α of the hollowed-out opening 3c is the side wall slope angle of the hollowed-out opening 3c of the auxiliary part 131, and is also the inclination angle of the total reflection interface. If the inclination angle of the total reflection interface is too steep or too gentle, the reflected light will deviate from the central region of the first opening 12a, or even avoid the bottom opening end of the first opening 12a, thereby reducing the amount of light received by the photosensitive module. That is, if the side wall slope angle α of the hollowed-out opening 3c is too steep or too gentle, the effective reflection area of the total reflection interface will be reduced. The effective reflection area is the area of the total reflection interface that reflects external light and can be received by the photosensitive module.

[0083] Based on this, the present application limits the side wall slope angle α to be between 45 degrees and 65 degrees to improve the effective reflection area of the total reflection interface.

[0084] Optionally, wherein the side wall slope angle α is between 45 degrees and 65 degrees, the effective reflection area of the total reflection interface is greater than or equal to 80% of the total area of the total reflection interface, so as to ensure that most of the large-angle light is received by the photosensitive module.

[0085] Optionally, the side wall slope angle α is 45 degrees, 46 degrees, 47 degrees, 48 degrees, 49 degrees, 50 degrees, 51 degrees, 52 degrees, 53 degrees, 54 degrees, 55 degrees, 56 degrees, 57 degrees, 58 degrees, 59 degrees, 60 degrees, 61 degrees, 62 degrees, 63 degrees, 64 degrees, or 65 degrees, etc.

[0086] Figure 5 is along theFigure 2 Another cross-sectional diagram of the MN line, namely Figure 5 This is a schematic diagram of another structure of the display panel 100 according to an embodiment of this application. Figure 6 for Figure 5 A magnified view of part p2. Figure 5 and Figure 6 The following will describe the parts that differ from the above embodiments in order to avoid redundant description.

[0087] Please refer to Figure 5 and Figure 6 In some embodiments of this application, the auxiliary part 131 includes at least two auxiliary layers 3a, which are stacked and at least cover the sidewall of the first opening 12a. In any two adjacent auxiliary layers 3a, the cutout 3c of the auxiliary layer 3a away from the black matrix layer 12 is located in the area of ​​the cutout 3c of the auxiliary layer 3a close to the black matrix layer 12.

[0088] The refractive index of the auxiliary layer 3a, which is furthest from the black matrix layer 12, is less than that of the planarization layer 14. The auxiliary layer 3a, which is furthest from the black matrix layer 12, and the planarization layer 14 come into contact to form the total internal reflection interface.

[0089] It is understood that the auxiliary part 131 is a film layer stacking structure, and the auxiliary part 131 includes at least two auxiliary layers 3a. The tilt angle of the total reflection interface can be adjusted by the subsequent auxiliary layers 3a to increase the effective reflection area of ​​the total reflection interface, thereby improving the photosensitivity of the photosensitive module.

[0090] Secondly, the auxiliary part 131 has a stacked structure, which increases the thickness of the auxiliary part 131 and the range of light absorption of the auxiliary part 131, and can further reduce the reflectivity of the display panel 100 at small viewing angles.

[0091] Optionally, in some embodiments of this application, in any two adjacent auxiliary layers 3a, the sidewall slope angle of the cutout 3c opened in the auxiliary layer 3a farther from the black matrix layer 12 is greater than the sidewall slope angle of the cutout 3c opened in the auxiliary layer 3a closer to the black matrix layer 12.

[0092] It is understandable that, in the thickness direction of the display panel 100, the sidewall slope angle of the cutout 3c of the auxiliary layer 3a that is closer to the flat layer 14 is larger due to the height of the lower auxiliary layer 3a, so as to improve the effective reflective area of ​​the total reflection interface.

[0093] Optionally, in some embodiments of this application, the sidewall slope angle α of the opening 3c of the auxiliary layer 3a that contacts the flat layer 14 is between 45 degrees and 65 degrees.

[0094] It can be understood that the side wall slope angle a of the hollow opening 3c opened by the auxiliary layer 3a in contact with the flat layer 14 is between 45 degrees and 65 degrees, so as to improve the effective reflection area of the total reflection interface.

[0095] Optionally, the side wall slope angle a of the hollow opening 3c opened by the auxiliary layer 3a in contact with the flat layer 14 is between 45 degrees and 65 degrees, and the effective reflection area of the total reflection interface is greater than or equal to 80% of the total area of the total reflection interface, so as to ensure that most of the large-angle light is received by the photosensitive module.

[0096] Optionally, the side wall slope angle a of the hollow opening 3c opened by the auxiliary layer 3a in contact with the flat layer 14 is 45 degrees, 46 degrees, 47 degrees, 48 degrees, 49 degrees, 50 degrees, 51 degrees, 52 degrees, 53 degrees, 54 degrees, 55 degrees, 56 degrees, 57 degrees, 58 degrees, 59 degrees, 60 degrees, 61 degrees, 62 degrees, 63 degrees, 64 degrees or 65 degrees, etc.

[0097] Optionally, in some embodiments of the present application, each auxiliary layer 3a extends to cover the side of the black matrix layer 12 away from the display substrate 11.

[0098] It can be understood that each auxiliary layer 3a also covers the surface of the black matrix layer 12, so that the black matrix layer 12 and the auxiliary part 131 form a multi-layer stacked structure for light absorption. Although the contact surface of the auxiliary part 131 and the flat layer 14 is a total reflection surface, under the small-angle viewing angle of the display panel 100, the small-angle external light will be absorbed by the auxiliary part 131 and the black matrix layer 12. The more auxiliary layers 3a included in the auxiliary part 131, the better the light absorption effect, thereby better reducing the reflectivity of the small-angle viewing angle.

[0099] Optionally, in some embodiments of the present application, a second opening 2a2 corresponds to a first sub-pixel of the display substrate 11, a third opening 2a3 corresponds to a second sub-pixel of the display substrate 11, and a fourth opening 2a4 corresponds to a third sub-pixel of the display substrate 11. The first filter part 13r is arranged in the second opening 2a2, the second filter part 13g is arranged in the third opening 2a3, and the third filter part 13b is arranged in the fourth opening 2a4.

[0100] The thickness of the first filter part 13r is greater than or equal to the depth of the second opening 2a2, the thickness of the second filter part 13g is greater than the depth of the third opening 2a3, and the thickness of the third filter part 13b is greater than or equal to the depth of the fourth opening 2a4.

[0101] The number of auxiliary layers 3a is less than or equal to three, and one auxiliary layer 3a corresponds to one of the first filter part 13r, the second filter part 13g and the third filter part 13b.

[0102] It can be understood that the material of the auxiliary layer 3a is the same as one of the first filter part 13r, the second filter part 13g and the third filter part 13b, and is formed by the same mask. In the process, the two are formed in the black matrix layer 12 by coating. Based on the leveling property of the organic material, the thickness of the organic material needs to be greater than or equal to the thickness of the black matrix layer 12, so that the auxiliary layer 3a fully covers the sidewall of the first opening 12a. Subsequently, the depth of the subsequent organic material is greater than the depth of the hollow part 3c of the previous auxiliary layer 3a, so that the subsequent auxiliary layer 3a can fully cover the sidewall of the hollow part 3c of the previous auxiliary layer 3a, so that the area of the total reflection interface is maximized, thereby improving the probability of reflecting external light into the first opening 12a, thereby improving the light transmittance of the first opening 12a, and thereby improving the light sensing capability of the light sensing module.

[0103] Secondly, one auxiliary layer 3a is connected to one of the first filter part 13r, the second filter part 13g and the third filter part 13b, so that the filter part 132 and the auxiliary layer 3a have connection continuity, thereby improving the area of the two covering the black matrix layer 12, and thereby reducing the reflectivity of small-angle external light.

[0104] Optionally, in some embodiments, in the black matrix layer 12, the auxiliary part 131 and the flat layer 14, the difference between the refractive indexes of any two adjacent film layers is the smallest between the auxiliary layer 3a and the flat layer 14.

[0105] It needs to be explained that, for example, the auxiliary part 131 has n (n is an integer greater than 1) auxiliary layers 3a, and the black matrix layer 12, the auxiliary part 131 and the flat layer 14 are stacked to form n+2 film layers, n+1 reflection interfaces, that is, n+1 refractive index differences. Among them, the refractive index difference between the nth auxiliary layer 3a and the flat layer 14 is the smallest.

[0106] It can be understood that the difference between the refractive indexes of the auxiliary layer 3a and the flat layer 14 is the smallest, so that more external light can enter the auxiliary layer 3a in contact with the flat layer 14, and then be absorbed by the auxiliary layer 3a. Among them, based on the fact that any one of the n+1 refractive index differences is smaller than the refractive index difference between the flat layer 14 and the black matrix layer 12, more external light is absorbed by the auxiliary part 131 and the black matrix layer 12, and part of the reflected light is eliminated by interference cancellation, so as to reduce the reflectivity.

[0107] Optionally, in some embodiments, in the black matrix layer 12 and the auxiliary part 131, the difference between the refractive indexes of any two adjacent film layers is less than or equal to 0.1 and greater than 0.

[0108] It can be understood that the smaller the refractive index difference between the two adjacent film layers is, the lower the interface reflectivity is, and the more external light will enter the film layer and be absorbed by the film layer. Therefore, the refractive index difference less than or equal to 0.1 and greater than 0 can better reduce the interface reflectivity, and then reduce the reflectivity.

[0109] It should be noted that, Figure 5 and Figure 6 The embodiments of the auxiliary part 131 include two auxiliary layers 3a as an example, and the following detailed description of Figure 5 and Figure 6

[0110] In Figure 5 and Figure 6 , the auxiliary part 131 includes a first auxiliary layer 3a1 and a second auxiliary layer 3a2, and the first auxiliary layer 3a1 covers at least the side wall of the first opening 12a. The hollow opening 3c opened on the first auxiliary layer 3a1 is a first hollow opening 3c1, and the first hollow opening 3c1 is in the area of the first opening 12a. The second auxiliary layer 3a2 covers at least the side wall of the first hollow opening 3c1, and the hollow opening 3c opened on the second auxiliary layer 3a2 is a second hollow opening 3c2. The second hollow opening 3c2 is in the area of the first hollow opening 3c1.

[0111] The refractive index of the second auxiliary layer 3a2 is less than the refractive index of the flat layer 14, and the second auxiliary layer 3a2 and the flat layer 14 form a total reflection interface.

[0112] It can be understood that the auxiliary part 131 includes the first auxiliary layer 3a1 and the second auxiliary layer 3a2, so that the second auxiliary layer 3a2 is stacked on the first auxiliary layer 3a1 to increase the side wall slope angle α of the second hollow opening 3c2, and then increase the effective reflection area of the total reflection interface.

[0113] Optionally, the side wall slope angle α of the second hollow opening 3c2 is greater than the side wall slope angle β of the first hollow opening 3c1.

[0114] It can be understood that the first auxiliary layer 3a1 is steeply stacked on the second auxiliary layer 3a2, so that the slope angle α of the second hollow opening 3c2 can be increased, and then the effective reflection area of the total reflection interface is increased.

[0115] Optionally, the side wall slope angle α of the second hollow opening 3c2 is between 45 degrees and 65 degrees. At this time, the effective reflection area of the total reflection interface is greater than or equal to 80% of the total area of the total reflection interface, so as to ensure that most of the large-angle light is received by the photosensitive module.

[0116] Optionally, the first auxiliary layer 3a1 also covers the side surface of the black matrix layer 12 away from the display substrate 11, and the second auxiliary layer 3a2 also covers the side surface of the first auxiliary layer 3a1 away from the black matrix layer 12.​

[0117] It can be understood that the first auxiliary layer 3a1 covers the black matrix layer 12, and the second auxiliary layer 3a2 covers the first auxiliary layer 3a1. The stack of the first auxiliary layer 3a1 and the second auxiliary layer 3a2 improves the light absorption performance of the auxiliary part 131, so as to better reduce the reflectivity at a small angle of view.

[0118] The thickness of the first filter part 13r is greater than or equal to the depth of the second opening 2a2, and the thickness of the second filter part 13g is greater than the thickness of the first filter part 13r. The first filter part 13r is integrally connected with the first auxiliary layer 3a1, and the second filter part 13g is integrally connected with the second auxiliary layer 3a2.

[0119] It can be understood that the first auxiliary layer 3a1 can be formed in the same mask process as one of the first filter part 13r, the second filter part 13g and the third filter part 13b. The material of the first auxiliary layer 3a1 can be the same as one of the first filter part 13r, the second filter part 13g and the third filter part 13b. The second auxiliary layer 3a2 can be formed in the same mask process as another one of the first filter part 13r, the second filter part 13g and the third filter part 13b. The material of the second auxiliary layer 3a2 can be the same as another one of the first filter part 13r, the second filter part 13g and the third filter part 13b.

[0120] For example, the material of the first auxiliary layer 3a1 is the same as that of the first filter part 13r, and the material of the second auxiliary layer 3a2 is the same as that of the second filter part 13g.

[0121] It can be understood that the thickness of the first filter part 13r is greater than or equal to the depth of the first opening 12a, so that the first auxiliary layer 3a1 fully covers the sidewall of the first opening 12a. The thickness of the second filter part 13g is greater than the depth of the first hollow part 3c1, so that the second auxiliary layer 3a2 fully covers the sidewall of the first hollow part 3c1, so as to maximize the area of the total reflection interface, thereby improving the probability that external light is reflected into the first opening 12a, thereby improving the light transmittance of the first opening 12a, and thereby improving the light sensing capability of the light sensing module.

[0122] Figure 7 is another cross-sectional structure diagram of the MN line along Figure 2 , that is Figure 7 is another structure diagram of the display panel 100 of the embodiment of the application. Figure 8 is an enlarged view of the p3 part of Figure 7 . In Figure 7 and Figure 8 , the parts different from the parts of the above-mentioned embodiments will be described to avoid redundant description.

[0123] Please refer to Figure 7 andFigure 8 In some embodiments of the present application, the auxiliary part 131 comprises a first auxiliary layer 3a1, a second auxiliary layer 3a2 and a third auxiliary layer 3a3, the first auxiliary layer 3a1 covers at least the sidewall of the first opening 12a. The hollow opening 3c on the first auxiliary layer 3a1 is a first hollow opening 3c1, and the first hollow opening 3c1 is in the area of the first opening 12a. The second auxiliary layer 3a2 covers at least the sidewall of the first hollow opening 3c1, and the hollow opening 3c on the second auxiliary layer 3a2 is a second hollow opening 3c2. The second hollow opening 3c2 is in the area of the first hollow opening 3c1. The third auxiliary layer 3a3 covers at least the sidewall of the second hollow opening 3c2, and the hollow opening 3c on the third auxiliary layer 3a3 is a third hollow opening 3c3. The third hollow opening 3c3 is in the area of the second hollow opening 3c2.

[0124] The refractive index of the third auxiliary layer 3a3 is less than the refractive index of the flat layer 14, and the third auxiliary layer 3a3 and the flat layer 14 form a total reflection interface.

[0125] Optionally, the sidewall slope angle α of the third hollow opening 3c3 is greater than the sidewall slope angle β of the second hollow opening 3c2, and the sidewall slope angle β of the second hollow opening 3c2 is greater than the sidewall slope angle θ of the first hollow opening 3c1.

[0126] It can be understood that the first auxiliary layer 3a1 and the second auxiliary layer 3a2 pad the third auxiliary layer 3a3, so that the sidewall slope angle α of the third hollow opening 3c3 can be increased, thereby increasing the effective reflection area of the total reflection interface.

[0127] Optionally, the sidewall slope angle α of the third hollow opening 3c3 is between 45 degrees and 65 degrees. At this time, the effective reflection area of the total reflection interface is greater than or equal to 80% of the total area of the total reflection interface, so as to ensure that most of the large-angle light is received by the photosensitive module.

[0128] Optionally, the third auxiliary layer 3a3 also covers the side surface of the second auxiliary layer 3a2 away from the first auxiliary layer 3a1.

[0129] It can be understood that the first auxiliary layer 3a1 covers the black matrix layer 12, the second auxiliary layer 3a2 covers the first auxiliary layer 3a1, and the third auxiliary layer 3a3 covers the second auxiliary layer 3a2. The stacking of the first auxiliary layer 3a1, the second auxiliary layer 3a2 and the third auxiliary layer 3a3 improves the light absorption performance of the auxiliary part 131, so as to better reduce the reflectivity of the small-angle view angle.

[0130] Optionally, the thickness of the first filter portion 13r is greater than or equal to the depth of the second opening 2a2, the thickness of the second filter portion 13g is greater than the thickness of the first filter portion 13r, and the thickness of the third filter portion 13b is greater than the thickness of the second filter portion 13g. The first filter portion 13r is integrally connected with the first auxiliary layer 3a1, the second filter portion 13g is integrally connected with the second auxiliary layer 3a2, and the third filter portion 13b is integrally connected with the third auxiliary layer 3a3.

[0131] It can be understood that the first auxiliary layer 3a1 can be formed in the same mask process as the first filter portion 13r. The material of the first auxiliary layer 3a1 can be the same as that of the first filter portion 13r. The second auxiliary layer 3a2 can be formed in the same mask process as the second filter portion 13g. The material of the second auxiliary layer 3a2 can be the same as that of the second filter portion 13g. The third auxiliary layer 3a3 can be formed in the same mask process as the third filter portion 13b. The material of the third auxiliary layer 3a3 can be the same as that of the third filter portion 13b.

[0132] It can be understood that the thickness of the first filter portion 13r is greater than or equal to the depth of the first opening 12a, so that the first auxiliary layer 3a1 fully covers the sidewall of the first opening 12a. The thickness of the second filter portion 13g is greater than the depth of the first hollow opening 3c1, so that the second auxiliary layer 3a2 fully covers the sidewall of the first hollow opening 3c1. The thickness of the third filter portion 13b is greater than the depth of the second hollow opening 3c2, so that the third auxiliary layer 3a3 fully covers the sidewall of the second hollow opening 3c2, so that the area of the total reflection interface is maximized, thereby improving the probability of reflecting external light into the first opening 12a, thereby improving the light transmittance of the first opening 12a, and thereby improving the light sensing capability of the light sensing module.

[0133] Correspondingly, please refer to Figure 9 The display device 1000 provided in the embodiments of the present application also includes a light sensing module 200 and a display panel 100 according to any one of the above embodiments. The light sensing module 200 is arranged on the backlight side of the display panel 100 and corresponds to the light sensing area SS.

[0134] It should be noted that the structure of the display panel 100 of the display device 1000 in the embodiments of the present application is similar or identical to that of the display panel 100 in any one of the above embodiments. For details, please refer to the description of Figures 1 to 8 Therefore, details are not repeated here.

[0135] Optionally, the display apparatus 1000 can be applied to and used in various products, including, for example, televisions, notebook computers, monitors, billboards, Internet of Things devices, and portable electronic devices including mobile phones, smart phones, tablet personal computers, mobile communication terminals, electronic organizers, electronic books, portable multimedia players, navigation, and ultra-mobile personal computers.

[0136] In addition, the display apparatus 1000 according to some embodiments can be applied to and used in wearable devices, including smart watches, watch phones, glasses-type displays, and head-mounted displays. In addition, according to some embodiments, the display apparatus 1000 can be applied to an instrument panel for a car, a display screen in a central instrument panel or a central information display arranged on an instrument panel for a car, an interior mirror display instead of a car side mirror, and a display of an entertainment system arranged on the back of a front seat for a rear seat passenger in a car.

[0137] The display panel 100 of the display apparatus 1000 according to the embodiments of the present application includes a display substrate 11 including a photosensitive area SS, a black matrix layer 12, an auxiliary portion 131, and a planar layer 14. The first opening 12a of the black matrix layer 12 is disposed in the photosensitive area SS. The auxiliary portion 131 covers at least a sidewall of the first opening 12a. The auxiliary portion 131 includes at least one auxiliary layer 3a, and each auxiliary layer 3a is provided with a hollow 3c. The hollow 3c is disposed in the area of the first opening 12a, and the planar layer 14 fills the hollow 3c. The refractive index of the planar layer 14 is greater than the refractive index of the auxiliary layer 3a in contact with the planar layer 14, and the auxiliary layer 3a in contact with the planar layer 14 and the planar layer 14 form a total reflection interface.

[0138] It can be understood that, in the embodiments of the present application, the auxiliary portion 131 covers the sidewall of the first opening 12a, so that the contact interface between the auxiliary portion 131 and the planar layer 14 forms a total reflection interface. At this time, the external light of a large angle is radiated to the total reflection interface and reflected to the first opening 12a by the total reflection interface, without being absorbed and / or refracted out of the first opening 12a by the black matrix layer 12, thereby improving the transmittance of the external light through the first opening 12a, and further allowing more external light to be received by the photosensitive module 200.

[0139] The above describes in detail a display panel and a display apparatus provided by the embodiments of the present application. The principles and implementation manners of the present application are described by applying specific examples, and the above description of the embodiments is only used to help understand the method and core idea of the present application; meanwhile, for those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the present application, and the above description of the present application should not be understood as a limitation.

Claims

1. A display panel, characterized by, The display substrate comprises a light-sensing area configured to transmit ambient light. A black matrix layer is disposed on the light-emitting side of the display substrate, and the black matrix layer is provided with a first opening, and the first opening is disposed in the light-sensing area. An auxiliary part covers at least the sidewall of the first opening, and the auxiliary part comprises at least one auxiliary layer, each auxiliary layer is provided with a hollow opening, and the hollow opening is disposed in the area of the first opening. A planar layer covers the side of the black matrix layer and the auxiliary part away from the display substrate, and the planar layer fills the hollow opening. The contact interface between the auxiliary part and the planar layer is a total reflection interface. The auxiliary part only comprises one auxiliary layer, the auxiliary layer covers at least the sidewall of the first opening, the hollow opening penetrates through the auxiliary layer, the refractive index of the auxiliary layer is less than the refractive index of the planar layer, and the auxiliary layer and the planar layer form the total reflection interface.

2. The display panel of claim 1, wherein, The auxiliary layer also covers the side surface of the black matrix layer away from the display substrate.

3. The display panel of claim 2, wherein, The black matrix layer is provided with a second opening, one second opening corresponds to one sub-pixel of the display substrate, and the display panel further comprises a light filtering structure layer, and the light filtering structure layer comprises a first light filtering part, and one first light filtering part is arranged in one second opening.

4. The display panel of claim 3, wherein, The thickness of the first light filtering part is greater than or equal to the depth of the second opening, and the first light filtering part is integrally connected with the auxiliary layer. The width of the hollow opening is equal to the width of the first opening.

5. The display panel of claim 2, wherein, The auxiliary part comprises at least two auxiliary layers, and the at least two auxiliary layers are stacked and cover at least the sidewall of the first opening.

6. The display panel of claim 1, wherein, In any two adjacent auxiliary layers, the hollow opening of the auxiliary layer away from the black matrix layer is arranged in the area of the hollow opening of the auxiliary layer close to the black matrix layer. The refractive index of the auxiliary layer farthest from the black matrix layer is less than the refractive index of the planar layer, and the auxiliary layer farthest from the black matrix layer and the planar layer form the total reflection interface.

7. The display panel of claim 6, wherein, In any two adjacent auxiliary layers, the sidewall slope angle of the hollow opening of the auxiliary layer away from the black matrix layer is greater than the sidewall slope angle of the hollow opening of the auxiliary layer close to the black matrix layer.

8. The display panel of claim 6, wherein, Each auxiliary layer extends to cover the side of the black matrix layer away from the display substrate.

9. The display panel of claim 8, wherein, The black matrix layer is provided with a second opening, a third opening and a fourth opening, one second opening corresponds to a first sub-pixel of the display substrate, one third opening corresponds to a second sub-pixel of the display substrate, and one fourth opening corresponds to a third sub-pixel of the display substrate; the display panel further comprises a light filtering structure layer, and the light filtering structure layer comprises a first light filtering part, a second light filtering part and a third light filtering part, the first light filtering part is arranged in the second opening, the second light filtering part is arranged in the third opening, and the third light filtering part is arranged in the fourth opening. The thickness of the first filter part is greater than or equal to the depth of the second opening, the thickness of the second filter part is greater than the depth of the third opening, and the thickness of the third filter part is greater than or equal to the depth of the fourth opening. The number of the auxiliary layers is less than or equal to three, and one of the auxiliary layers is connected to one of the first filter part, the second filter part and the third filter part.

10. The display panel according to any one of claims 1-9, characterized in that, The slope angle of the sidewall of the hollowed-out opening of the auxiliary layer in contact with the flat layer is between 45 degrees and 65 degrees.

11. The display panel according to any one of claims 1-9, wherein, The display panel further comprises a filter structure layer, and the auxiliary part is formed in the filter structure layer.

12. A display device, characterized by comprising: The display panel comprises a photosensitive module and a display panel as claimed in any one of claims 1-11, wherein the photosensitive module is arranged on the backlight side of the display panel and corresponds to the photosensitive area.

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