CN120813203A

CN120813203A - Display panel, display module and electronic equipment

Info

Publication number: CN120813203A
Application number: CN202410434240.6A
Authority: CN
Inventors: 唐涛; 李彤彤; 张心月; 倪欢
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2024-04-10
Filing date: 2024-04-10
Publication date: 2025-10-17

Abstract

The present application provides a display panel, a display module, and an electronic device, which relate to the field of display technology and are used to improve the light extraction efficiency of the display panel and reduce the manufacturing cost. The display panel includes a driving backplane, a light-emitting layer, and a touch layer. The touch layer includes a first touch metal layer, a touch insulating layer, a second touch metal layer, and a touch flat layer. The touch insulating layer is arranged between the first touch metal layer and the second touch metal layer. The first touch metal layer includes a first hole; the touch insulating layer includes a second hole; the second touch metal layer includes a third hole. The projections of the first hole, the second hole, and the third hole on the driving backplane cover the projections of the light-emitting device on the driving backplane. The touch flat layer is arranged above the second touch metal layer and the touch insulating layer. The touch flat layer fills the second hole. The optical refractive index of the touch insulating layer is less than that of the touch flat layer. A microlens structure can be formed in the touch layer to improve the light extraction efficiency of the display panel.

Description

Display panel, display module and electronic equipment

Technical Field

The present application relates to the field of display technologies, and in particular, to a display panel, a display module, and an electronic device.

Background

An Organic LIGHT EMITTING Diode (OLED) display screen has the advantages of self-luminescence, wide viewing angle, high contrast, full-color display, light weight, thin thickness, low power consumption, high reaction speed and the like, can realize flexible display, and is a display device with great development potential.

In order to improve the efficiency of the display screen, a micro lens array (micro LENS ARRAY, MLA) or a micro lens layer (micro LENS PANEL, MLP) may be disposed in the display screen, and the propagation direction of the emergent light is improved by the refraction and reflection of the lens, so as to improve the light-emitting efficiency of the display screen. However, the arrangement of the microlenses increases the number of film layers of the display screen, the cost is increased, and the interface between the film layers is increased, which also results in deterioration of the reflectivity of the display screen.

Disclosure of Invention

The embodiment of the application provides a display panel, a display module and electronic equipment, which are used for improving the light emitting efficiency of the display panel and the display module and reducing the preparation cost.

In a first aspect, the embodiment of the application provides a display panel, which comprises a driving backboard, a light-emitting layer and a touch control layer, wherein the light-emitting layer comprises a light-emitting device, the light-emitting device is arranged on the driving backboard, the touch control layer is arranged above the light-emitting layer, the touch control layer comprises a first touch control metal layer, a touch control insulating layer, a second touch control metal layer and a touch control flat layer, the touch control insulating layer is arranged between the first touch control metal layer and the second touch control metal layer, the first touch control metal layer comprises a first hole, the touch control insulating layer comprises a second hole, the second touch control metal layer comprises a third hole, the projection of the first hole, the second hole and the third hole on the driving backboard covers the projection of the light-emitting device on the driving backboard, the touch control flat layer is arranged above the second touch control metal layer and the touch control insulating layer, and the touch control flat layer is filled with the second hole, and the optical refractive index of the touch control insulating layer is smaller than that of the touch control flat layer.

The touch insulating layer of the display panel provided by the embodiment of the application comprises the second hole, the touch flat layer is filled in the second hole, the optical refractive index of the touch insulating layer is smaller than that of the touch flat layer, the refractive index difference of media at two sides of the second hole forms a micro-lens structure, when light rays emitted by the light emitting device pass through the micro-lens structure, the light emitting efficiency of the display panel is improved, in addition, the micro-lens structure is realized by utilizing the touch insulating layer and the touch flat layer, no new film layer is added, the reflectivity can be reduced, and the preparation cost is reduced.

In one possible implementation, the display panel further includes a pixel defining layer disposed over the driving back plate, the pixel defining layer including a fourth aperture including a first opening near the driving back plate and a second opening remote from the driving back plate, the second opening of the fourth aperture being larger than the first opening of the fourth aperture, the light emitting device being disposed in the fourth aperture.

In one possible implementation manner, the pixel defining layer comprises a plurality of fourth holes, the light emitting devices are in one-to-one correspondence with the fourth holes, the touch insulating layer comprises a plurality of second holes, and the light emitting devices are in one-to-one correspondence with the second holes. Each fourth hole of the pixel limiting layer is correspondingly provided with a light emitting device, the plurality of second holes of the touch insulating layer are in one-to-one correspondence with the plurality of light emitting devices, a plurality of micro lenses which are in one-to-one correspondence with the plurality of light emitting devices can be formed, the light emitting efficiency of the light emitting devices can be improved, and the display effect of the display panel can be improved.

In one possible implementation manner, the display panel further comprises a filter layer, the filter layer comprises a black shading matrix and a color filter film, the black shading matrix is arranged above the touch layer, the black shading matrix comprises a fifth hole, the fifth hole comprises a first opening close to the driving backboard and a second opening far away from the driving backboard, the second opening of the fifth hole is larger than the first opening of the fourth hole, projection of the fifth hole on the driving backboard covers projection of the light emitting device on the driving backboard, the plurality of fifth holes are arranged, the plurality of fifth holes correspond to the plurality of light emitting devices one by one, and the color filter film is arranged above the black shading matrix and the touch layer.

In one possible implementation, the filter layer further includes a filter planarization layer disposed over the black light blocking matrix and the color filter film.

In one possible implementation, the second hole includes a first opening near the driving back plate and a second opening far from the driving back plate, the second opening of the second hole being larger than the first opening of the second hole, and the touch insulating layer has a side surface inclined with respect to the driving back plate at the second hole, wherein the side surface forms an included angle with the driving back plate, and the included angle ranges from 20 degrees to 89.9 degrees.

In one possible implementation, the fourth, second and fifth holes are aligned with the light emitting device in a direction perpendicular to the driving backplate.

In one possible implementation, the first opening of the second hole of the touch insulating layer is larger than the first opening of the fourth hole of the pixel defining layer, and the expansion distance of the first opening of the second hole of the touch insulating layer relative to the first opening of the fourth hole of the pixel defining layer is 0-3 micrometers in the direction parallel to the driving back plate.

In one possible implementation, the distance between the surface of the touch insulating layer facing the driving back plate and the surface of the touch flat layer facing away from the driving back plate is 0.5 micrometers to 5 micrometers.

In one possible implementation, the optical refractive index of the touch insulating layer is 1.45-1.55, and the optical refractive index of the touch flat layer is 1.55-1.8.

In one possible implementation, the first opening of the fifth hole of the black light shielding matrix is larger than the first opening of the fourth hole of the pixel defining layer, and the flaring distance of the first opening of the fifth hole relative to the first opening of the fourth hole is 3-7 micrometers.

In one possible implementation, the display panel further includes a filter substrate layer disposed between the touch layer and the filter layer.

In one possible implementation, the display panel further includes an encapsulation layer disposed over the light emitting layer, and the touch layer is disposed over the encapsulation layer.

In one possible implementation, the touch layer further includes a touch buffer layer disposed between the first touch metal layer and the encapsulation layer.

In a second aspect, the embodiment of the application further provides a display panel, which comprises a driving backboard, a light emitting layer, a touch layer and a filter layer, wherein the light emitting layer comprises a light emitting device, the light emitting device is arranged on the driving backboard, the touch layer is arranged above the light emitting layer, the filter layer comprises a black shading matrix, a first refraction layer and a color filter film, the black shading matrix is arranged above the touch layer, the black shading matrix comprises a sixth hole, the first refraction layer is arranged above the black shading matrix, the first refraction layer comprises a seventh hole, projections of the sixth hole and the seventh hole on the driving backboard cover projections of the light emitting device on the driving backboard, the color filter film is arranged above the first refraction layer and the touch layer, the color filter film fills the seventh hole, and the optical refractive index of the first refraction layer is lower than that of the color filter film. According to the embodiment of the application, the first refraction layer is additionally arranged in the filter layer, the micro lens structure is realized in the filter layer by utilizing the first refraction layer and the color filter film, the color filter film in the filter layer is multiplexed to serve as the high refraction layer, and only one low refraction layer is additionally arranged, so that the display performance of the display panel is effectively improved, in addition, 1 mask can be saved, the number of processing procedures is reduced, and the preparation cost is reduced.

In one possible implementation, the first refractive layer has a side surface inclined with respect to the driving back plate at the seventh hole, wherein the side surface forms an angle with the driving back plate, and the angle ranges from 20 degrees to 89.9 degrees.

In one possible implementation, the optical refractive index of the first refractive layer is 1.45-1.55, and the optical refractive index of the color filter film is 1.55-1.8.

The display panel comprises a driving backboard, a light-emitting layer, a touch layer, a first refraction layer and a color filter film, wherein the light-emitting layer comprises a light-emitting device, the light-emitting device is arranged on the driving backboard, the touch layer comprises a touch buffer layer, a first touch metal layer, a touch insulating layer and a second touch metal layer which are sequentially arranged, the first refraction layer is arranged above the second touch metal layer and the touch insulating layer, the first refraction layer comprises an eighth hole, projection of the eighth hole on the driving backboard covers projection of the light-emitting device on the driving backboard, the color filter film is arranged on the first refraction layer and the touch insulating layer, the eighth hole is filled with the color filter film, and the optical refractive index of the first refraction layer is lower than that of the color filter film. In the embodiment of the application, the microlens structure is realized by using the first refraction layer and the color filter film, the light emitting efficiency of the display panel is improved, the first refraction layer covers the second touch metal layer of the touch layer, the eighth hole is formed, the color filter film with higher optical refractive index than the first refraction layer can cover the first refraction layer, and the eighth hole is filled to form the microlens structure, compared with the scheme of arranging the microlens layer on the filter layer, 2 masks can be saved, the number of processing procedures is reduced, and the preparation cost can be reduced.

In one possible implementation, the display panel further includes a black light shielding matrix disposed on the first refraction layer and the color filter film, the black light shielding matrix including an opening, a projection of the opening of the black light shielding matrix on the driving back plate covering a projection of the light emitting device on the driving back plate.

In one possible implementation, the first refractive layer has a side surface inclined with respect to the driving back plate at the eighth hole, wherein the side surface forms an angle with the driving back plate, and the angle ranges from 20 degrees to 89.9 degrees.

In a fourth aspect, an embodiment of the present application provides a display module, where the display module includes a support layer, a display panel and a cover plate that are sequentially set, the display panel is bonded to the support layer, the display panel is bonded to the cover plate, and the display panel is provided in any one of the first to third aspects and any implementation manner thereof.

In a fifth aspect, an embodiment of the present application provides an electronic device, including a display module and a housing, where the display module is a display module provided in the fourth aspect, and the display module is connected to the housing.

Drawings

Fig. 1 is a schematic diagram of an electronic device according to an embodiment of the present application;

Fig. 2 is a schematic diagram of a display panel according to an embodiment of the application;

FIG. 3 is a schematic diagram of another display panel according to an embodiment of the present application;

FIG. 4 is a schematic diagram of another display panel according to an embodiment of the present application;

FIG. 5 is a schematic diagram of another display panel according to an embodiment of the present application;

FIG. 6 is a schematic diagram of another display panel according to an embodiment of the present application;

FIG. 7 is a schematic diagram of another display panel according to an embodiment of the present application;

FIG. 8 is a schematic diagram of another display panel according to an embodiment of the present application;

FIG. 9 is a schematic diagram of another display panel according to an embodiment of the present application;

FIG. 10 is a schematic diagram of another display panel according to an embodiment of the present application;

FIG. 11 is a schematic view of a display panel with multiple holes on a driving back plate according to an embodiment of the present application;

FIG. 12 is a schematic diagram of another display panel according to an embodiment of the present application;

FIG. 13 is a schematic diagram of another display panel according to an embodiment of the present application;

FIG. 14 is a schematic view of another display panel according to an embodiment of the present application;

Fig. 15 is a schematic diagram of a display module according to an embodiment of the application.

Detailed Description

The following description of the technical solutions according to the embodiments of the present application will be given with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments.

Hereinafter, the terms "first," "second," and the like are used for descriptive convenience only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more. For example, a plurality of processing units refers to two or more processing units.

Furthermore, in the embodiments of the present application, "upper", "lower", "left" and "right" are not limited to the orientation in which the components in the drawings are schematically disposed, and it should be understood that these directional terms may be relative concepts, which are used for descriptive and clarity with respect thereto, and which may be correspondingly varied according to the variation in orientation in which the components in the drawings are disposed. In the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the dimensional relationships between the parts in the drawings do not reflect actual dimensional relationships.

In the embodiments of the present application, unless explicitly specified and limited otherwise, the term "connected" shall be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral unit, and may be directly connected or indirectly connected through an intermediary. Furthermore, the term "electrically connected" may be a direct electrical connection or an indirect electrical connection via an intermediary.

In the embodiment of the present application, the term "module" is generally a functional structure divided according to logic, and the "module" may be implemented by pure hardware or a combination of hardware and software. In the embodiment of the application, the description of the association relation of the association objects means that three relations can exist, for example, A and/or B can mean that A exists alone, B exists alone, and both A and B exist.

In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

The scheme provided by the embodiment of the application can be applied to electronic equipment such as mobile phones (mobile phones), personal computers (personal computer, PCs), tablet computers (pad), intelligent wearable products (such as intelligent watches and intelligent bracelets), virtual Reality (VR) terminal equipment, augmented reality (augmented reality, AR) terminal equipment, vehicle-mounted terminals, displays and other electronic equipment, or can be any electronic equipment needing to be provided with a display screen, and the embodiment of the application does not limit the specific form of the electronic equipment.

Taking a mobile phone as an example, fig. 1 shows a schematic diagram of an electronic device according to an embodiment of the present application, where the electronic device includes a display 110, a middle frame 120, and a rear cover (not shown in the drawings). The display screen 110 and the rear cover are respectively located at both sides of the middle frame 120, the rear surface of the display screen 110 faces the rear cover, and the display screen 110 and the rear cover can be connected through the middle frame 120. The electronic device further includes a main board, where the processor, the external memory interface, the internal memory, the universal serial bus (universal serial bus, USB) interface, the charge management module, the power management module, the battery, the camera, and other devices or functional modules of the electronic device are disposed on the main board, and the main board is accommodated in an accommodating space formed by the middle frame 120, the display screen 110, and the rear cover.

The display screen may have a flat surface capable of displaying an image, or the display screen may have a curved surface capable of displaying an image, for example, the display screen 110 may be a straight panel screen or a curved panel screen, the display screen may further include a foldable surface, for example, the display screen 110 may be a foldable display screen, or the display screen 110 may be a rollable display screen.

The display 110 may be a Liquid Crystal Display (LCD) or an organic light-emitting diode (OLED) display. Taking an OLED display screen as an example, the OLED display device has many advantages of self-luminescence, abundant colors, fast response speed, wide viewing angle, light weight, thin thickness, low power consumption, capability of realizing flexible display and large-area full-color display, and the like, and is considered as a display device with the most development potential in the industry.

OLEDs can be classified into two major categories, passive Matrix OLED (PMOLED) and Active Matrix OLED (AMOLED) according to the driving manner. The active matrix OLED is also called an active OLED, and the AMOLED is driven by integrating a thin film transistor (thin film transistor, TFT) and a capacitor in each pixel and maintaining a voltage by the capacitor, so that a large-sized, high-resolution panel can be realized, and the luminous efficiency is high, which is an important point of current research and the development direction of future display technologies.

Referring to fig. 2 and 3, fig. 2 is a schematic cross-sectional view illustrating an example of a display panel according to an embodiment of the present application. The display panel includes a driving back plate 210, a pixel defining layer (pixel definition layer, PDL) 211, a light emitting layer 220, a packaging (thin film encapsulation, TFE) layer 230, a touch layer 240, and a planarization layer 250, each of which may be formed by a continuous process, or at least some of the film structures may be bonded to each other by a connection layer, which may include a conventional adhesive or glue.

In which the driving backplate 210 is provided with a pixel circuit, a driving circuit, or the like. The pixel defining layer 211 is disposed over the driving backplate 210, the pixel defining layer 211 includes a plurality of holes, the light emitting layer 220 includes a plurality of light emitting devices 221 disposed on the driving backplate 210, for example, red, green, or blue light emitting devices 221, the light emitting devices 221 are disposed in the holes of the pixel defining layer 211, for example, one light emitting device 221 is disposed per hole of the pixel defining layer 211, and the light emitting devices 221 may be driven to emit light by pixel circuits or driving circuits in the driving backplate 210.

The display panel comprises a plurality of pixels which are arranged in an array, and each pixel comprises a corresponding number of sub-pixels according to the color matching mode of the OLED display panel. For example, in connection with fig. 3, the display panel may employ a red-green-blue (RGB) color scheme, in which case each pixel may include three sub-pixels of red, green, and blue, each sub-pixel includes a light emitting device of a corresponding color, for example, a red light emitting device 221-R, a green light emitting device 221-G, and a blue light emitting device 221-B shown in fig. 3, which emit light of a corresponding color by excitation of excitons formed by combining holes and electrons under the action of a driving circuit, for example, the red light emitting device 221-R may emit red light, the green light emitting device 221-G may emit green light, and the blue light emitting device 221-B may emit blue light.

In practical applications, the display panel may also adopt a red-green-blue-white (RGBW) color scheme, in which case each pixel includes four sub-pixels including a red sub-pixel capable of displaying red light, a green sub-pixel capable of displaying green light, a blue sub-pixel capable of displaying blue light, and a white sub-pixel capable of displaying white light.

The encapsulation layer 230 is located above the light emitting layer 220, or it may be considered that the encapsulation layer 230 is located at one side of the light emitting layer 220 in the light emitting direction, and the encapsulation layer 230 is used for protecting the light emitting layer 220, for example, may be used for blocking moisture or oxygen from penetrating into the light emitting layer 220 to damage the light emitting layer.

The touch layer 240 is disposed on the encapsulation layer 230, and the touch layer 240 may sense a touch or an input to the display screen through an external medium such as a hand or a stylus. The display panel provided by the embodiment of the application adopts a mode of touch (touch on encapsulation, TOE) sensing on film packaging, so the display panel can also be called as a touch integrated display panel, and has the characteristics of low cost, thin thickness and high reliability because no additional touch panel is required.

A planarization (OC) layer 250 is disposed on the touch layer 240, and the planarization layer 250 is used for planarizing (leveling) the touch layer 240, so that other functional film layers, such as a cover plate or a protective film, are disposed on the touch layer 240.

The polarizer arranged in the OLED display panel can reduce the reflectivity of the display panel under strong light, improve the contrast ratio and improve the display effect, the reflectivity can be used for indicating the capability of the display panel to reflect the ambient light, and the higher the reflectivity is, the worse the condition of the display panel to reflect the ambient light is, and the worse the display effect is. The arrangement of the polaroid can reduce the reflectivity of the display panel under strong light, but the polaroid can absorb light rays emitted by pixels in the display panel, so that the light-emitting efficiency of the display panel can be reduced.

In order to solve the above problems, a technology of forming color filters (color filter on thin film encapsulation, COE) on a thin film package structure has been proposed, and by forming Color Filters (CF) (or also referred to as color filters) on a package layer, the reflectivity of a display panel can be reduced and the light extraction efficiency can be improved.

Referring to fig. 4 and 5, fig. 4 is a display panel to which the COE technology is applied according to an embodiment of the present application, the display panel includes a driving back plate 310, a pixel defining layer 311, a light emitting layer 320, an encapsulation layer 330, a touch layer 340, and a filter layer 350, wherein at least a portion of film structures of the light emitting layer 320, the encapsulation layer 330, the touch layer 340, and the filter layer 350 may be formed through a continuous process, or at least some of the film structures may be combined with each other through a connection layer, which may include a conventional adhesive or glue.

In which a pixel circuit or a driving circuit, etc. is provided in the driving back plate 310, the pixel defining layer 311 is provided on the driving back plate 310, the pixel defining layer 311 includes a plurality of holes 3111, the light emitting layer 320 is provided above the driving back plate 310, the light emitting layer 320 includes a plurality of light emitting devices 321, for example, red, green or blue light emitting devices, the light emitting devices 321 are provided in the holes 3111 of the pixel defining layer 311, and the light emitting devices 321 can be driven to emit light by the pixel circuit or the driving circuit in the driving back plate 310, thereby displaying the corresponding contents.

The encapsulation layer 330 is located above the light emitting layer 320, and the encapsulation layer 330 is used to protect the light emitting layer 320, for example, to block moisture or oxygen from penetrating into the light emitting layer 320 to damage the light emitting layer.

The touch layer 340 is disposed over the encapsulation layer 330, and the touch layer 340 may sense touch or input to the display panel through an external medium such as a hand or a stylus.

The touch layer 340 includes a touch Buffer layer 341 (TOE Buffer), a first Touch Metal A (TMA) 342, a touch insulating layer 343, a second Touch Metal B (TMB) 344, and a touch planarization layer 345 (TOE OC). The touch buffer layer 341 is formed on a side of the encapsulation layer 330 facing away from the light emitting layer 320. The first touch metal layer 342 is formed on the surface of the touch buffer layer 341 facing away from the encapsulation layer 330, and the first touch metal layer 342 is patterned to form a specific circuit. The touch insulating layer 343 is formed on the surface of the touch buffer layer 341 facing away from the encapsulation layer 330, and the touch insulating layer 343 covers the first touch metal layer 342. The second touch metal layer 344 is disposed on the surface of the touch insulating layer 343 facing away from the touch buffer layer 341, the second touch metal layer 344 is patterned to form a circuit in a specific form, the touch flat layer 345 is disposed on the touch insulating layer 343 and the second touch metal layer 344, the touch flat layer 345 covers the second touch metal layer 344 and can play a role in leveling and protecting, and the first touch metal layer 342 can be electrically connected with the second touch metal layer 344 through a conductive medium (not shown in the figure) penetrating through the touch insulating layer 343.

A filter layer 350 is disposed on the touch layer 340, the filter layer 350 includes a Black Matrix (BM) 351, color filter films 352 and a filter flat layer 353, the color filter films 352 corresponding to the colors of the light emitting devices are disposed at positions of the filter layer 350 corresponding to the colors of the light emitting devices of the light emitting layer 320, the color filter films 352 are spaced apart by the black matrix 351, and the filter flat layer 353 covers the black matrix 351 and the color filter films 352.

Illustratively, in connection with fig. 5, the light emitting layer 320 includes a red light emitting device 321-R, a green light emitting device 321-G, and a blue light emitting device 321-B, a red color filter film 352-R is disposed at a position of the filter layer 350 corresponding to the red light emitting device 321-R, a green color filter film 352-G is disposed at a position corresponding to the green light emitting device 321-G, a blue color filter film 352-B is disposed at a position corresponding to the blue light emitting device 321-B, and different color filter films are separated by a black light shielding matrix 351. Alternatively, it may be considered that the black light blocking matrix 351 includes a plurality of holes corresponding to positions of the light emitting devices, and color filter films of corresponding colors are filled in the holes, so that external light may be absorbed when passing through the filter layer 350, thereby realizing an anti-reflection function.

In order to further improve the light-emitting efficiency of the display panel, micro LENS ARRAY (MLA) technology is proposed in the industry, for example, on the basis of fig. 2, referring to fig. 6, a low refractive lens 251 may be disposed outside the light-emitting device, and a microlens array is formed by matching with the full-coating high refractive layer 252, so that when the light emitted by the light-emitting layer passes through the microlens array, the light can be gathered, and the efficiency of the display panel is improved.

Based on fig. 4, referring to fig. 7 in combination, the embodiment of the application further provides a display panel combining the COE technology and the MLA technology, and a microlens layer may be additionally disposed on the filter layer of the display panel, so as to improve the light emitting efficiency of the display panel. The display panel shown in fig. 7 is additionally provided with a lens layer 360, the lens layer 360 includes a first refractive layer 361 and a second refractive layer 362, wherein the first refractive layer 361 is disposed on a surface of the filter layer 350 facing away from the light emitting layer 320, the first refractive layer 361 includes a plurality of holes 3611 corresponding to positions of the light emitting devices 321 on the light emitting layer 320, and a projection of the holes 3611 on the driving back plate 310 may cover a projection of the light emitting devices on the driving back plate 310. The second refractive layer 362 is disposed over the filter layer 350 and the first refractive layer 361, and the second refractive layer 362 may fill the hole 3611 of the first refractive layer 361, and the first refractive layer 361 may have an optical refractive index smaller than that of the second refractive layer 362, for example, the first refractive layer 361 may be formed of a low refractive index resin material, and the second refractive layer 362 may be formed of a high refractive index resin material. When light emitted by the light emitting device passes through the first refractive layer 361 and the second refractive layer 362 with different refractive indexes in the transmission process, the transmission direction of the light can be changed, the first refractive layer 361 with low refractive index is provided with holes 3611, the part of the second refractive layer 362 with high refractive index, which fills the holes 3611, is formed into a micro lens structure, and the micro lens structure can further gather light, so that the forward light emitting efficiency of the display panel is effectively increased.

According to the scheme of the display panel, the light-emitting efficiency of the display panel can be improved, but the number of the film layers of the display panel is increased, interfaces between different film layers are also increased, for example, interfaces between a first refraction layer and a filter layer, interfaces between a second refraction layer and the first refraction layer and the like, the increase of the interfaces can lead to the increase of the reflectivity of the display panel, in addition, masks are needed for imaging the optical film layer structure, and two masks are needed for imaging the first refraction layer and the second refraction layer, so that the preparation cost of the display panel is increased.

In view of improving the light emitting efficiency of the display panel and reducing the preparation cost, the embodiment of the application provides a display panel, which is realized by blending a low refractive lens layer into a display panel adopting a COE technology or by utilizing the refractive index difference between a filter film and the low refractive lens layer, so that the light emitting efficiency of the display panel can be improved, and on the other hand, the addition of a new film layer can be avoided, the reflectivity is reduced, and the cost of using a mask can be reduced.

Referring to fig. 8 and 9, fig. 8 shows a display panel according to an embodiment of the application, which includes a driving back plate 410, a pixel defining layer 411, a light emitting layer 420, an encapsulation layer 430, a touch layer 440, and a filter layer 450.

The touch layer 440 includes a touch buffer layer 441, a first touch metal layer (TMA) 442, a touch insulating layer 443, a second touch metal layer (TMB) 444, and a touch planarization layer (TOE OC) 445.

The touch buffer layer 441 is disposed above the encapsulation layer 430, that is, the encapsulation layer 430 faces away from the surface of the driving back plate 410, the first touch metal layer 442 is disposed above the touch buffer layer 441, and the first touch metal layer 442 includes a plurality of first holes, the projection of the first holes on the driving back plate 410 may cover the projection of the light emitting devices 421 on the driving back plate 410, the touch insulating layer 443 is disposed above the touch buffer layer 441 and the first touch metal layer 442, the touch insulating layer 443 may cover the first touch metal layer 442, and the touch insulating layer 443 includes a plurality of second holes 4431, the second holes 4431 are located right above the light emitting devices 421, the plurality of second holes 4431 are in one-to-one correspondence with the plurality of light emitting devices 421, and the projection of the second holes 4431 on the driving back plate 410 may cover the projection of the light emitting devices 421 on the driving back plate 410. The second touch metal layer 444 is disposed above the touch insulating layer 443, the second touch metal layer 444 includes a plurality of third holes, the projection of the third holes on the driving back plate 410 may cover the projection of the light emitting device 421 on the driving back plate 410, the touch flat layer 445 is disposed above the touch buffer layer 441, the touch insulating layer 443 and the second touch metal layer 444, and the touch flat layer 445 fills the second holes 4431 of the touch insulating layer 443. The optical refractive index of the touch insulating layer 443 is smaller than that of the touch flat layer 445.

In the display panel provided by the embodiment of the application, the refractive index of the touch insulating layer 443 is lower than that of the touch flat layer 445, the touch insulating layer 443 is provided with the second hole 4431 above the light emitting device 421, and the touch flat layer 445 can fill the second hole 4431 of the touch insulating layer 443 to form a micro-lens structure, so that the micro-lens structure is realized by utilizing the touch insulating layer 443 of the touch layer 440 and the touch flat layer 445, and the micro-lens layer and the touch layer 440 are combined together, thereby reducing the cost of the display panel, improving the light emitting efficiency, avoiding the increase of the reflectivity caused by the additional arrangement of the micro-lens layer, and avoiding the increase of the preparation cost caused by the additional arrangement of the micro-lens layer of the display panel.

Referring to fig. 8, the driving back plate 410 includes a driving circuit, and the light emitting device 421 can be driven to emit light by the driving circuit, wherein the driving back plate 410 may include a substrate and a circuit layer disposed on one side of the substrate, the substrate may be a flat structure, the substrate may be a rigid or flexible substrate, and the substrate may be a single-layer or multi-layer structure. The circuit layer may include a driving circuit by which the light emitting device 421 may be driven to emit light.

For example, the display panel may be divided into at least a display area and a peripheral area outside the display area, and the driving circuit may include a pixel circuit located in the pixel area and a peripheral circuit located in the edge area, where the pixel circuit may be a pixel circuit such as a pixel circuit 6T1C, a pixel circuit 7T1C, or a pixel circuit 8T1C, as long as the light emitting device 421 can be driven to emit light, and the structure thereof is not limited in particular. The number of pixel circuits may be the same as the number of light emitting devices 421 of the light emitting layer, and connected to the respective light emitting devices 421 in one-to-one correspondence so as to control the light emission of the respective light emitting devices 421, respectively. Wherein nTmC denotes a pixel circuit including n transistors (denoted by the letter "T") and m capacitors (denoted by the letter "C"). Of course, the same pixel circuit may be connected to a plurality of light emitting devices 421, and the plurality of light emitting devices 421 may be driven to emit light at the same time, which is not particularly limited herein.

The peripheral circuit is connected to the pixel circuit for inputting a driving signal to the pixel circuit so as to control the light emitting device 421 to emit light. The peripheral circuit may include a gate driving circuit and a light emission control circuit, and of course, may also include other circuits, and the specific structure of the peripheral circuit is not particularly limited herein.

Referring to fig. 8 and 9, the pixel defining layer 411 may be made of a light-impermeable material, the pixel defining layer 411 is formed with a plurality of holes (e.g., fourth holes 4111), the light emitting layer 420 includes a plurality of light emitting devices 421, and the light emitting devices 421 are disposed in the fourth holes 4111 of the pixel defining layer 411, e.g., the plurality of light emitting devices 421 are in one-to-one correspondence with the plurality of fourth holes 4111. The light emitted from the light emitting device 421 has a certain diverging effect, and the fourth hole 4111 of the pixel defining layer 411 is generally an inverted cone hole, for example, the fourth hole 4111 includes a first opening near the driving back plate 410 and a second opening far from the driving back plate 410, the second opening is identical to the first opening in shape, the center of the second opening is located on the same axis as the center of the first opening, the axis is perpendicular to the driving back plate, and the second opening is larger than the first opening, so that the side wall of the fourth hole 4111 forms a slope to facilitate the light emission of the light emitting device 421, and the size of the first opening of the fourth hole 4111 determines the light emitting area of the light emitting device 421.

The light emitting layer 420 further includes an anode layer 423 and a cathode layer 424, and the light emitting device 421 is provided with the anode layer 423 on a side facing the driving backplate 410, and the anode layer 423 is also located in the fourth hole 4111 of the pixel defining layer 411. The side of the light emitting device 421 facing away from the driving backplate 410 is provided with a cathode layer 424, which cathode layer 424 has sufficient light transmittance such that light emitted by the light emitting device 421 can be directed to the outside through the cathode layer 424. The cathode layer 424 may be a continuous overall layer structure, for example, the cathode layer 424 may cover a plurality of light emitting devices 421 of the light emitting layer 420, and the light emitting devices 421 at different positions may be connected to the same cathode layer 424, so that the cathode layer 424 may also be referred to as a common cathode (common cathode).

The display panel may be in a red-green-blue (RGB) color scheme, in which case each pixel may include three sub-pixels of red, green, and blue, each sub-pixel including a light emitting device 421 of a corresponding color, for example, the red light emitting device 421-R, the green light emitting device 421-G, and the blue light emitting device 421-B shown in fig. 9, and in other embodiments, the plurality of sub-pixels may further include sub-pixels capable of displaying white light, that is, the display panel may be in an RGBW color scheme. For convenience of description, one light emitting device 421 will be described as an example in the following examples.

With continued reference to fig. 8, the encapsulation layer 430 is located outside the light emitting layer, for example, the encapsulation layer 430 may cover each light emitting device 421 of the light emitting layer, so as to block moisture or oxygen from penetrating into the light emitting layer to damage the light emitting layer.

The encapsulation layer 430 may include a first inorganic layer 431, an organic encapsulation layer 432, and a second inorganic layer 433, wherein the first inorganic layer 431 may cover the light emitting devices 421 of the light emitting layer, i.e., the first inorganic layer 431 may cover the surface of the cathode layer 424 remote from the driving backplate 410. The material of the first inorganic layer 431 may include an inorganic insulating material such as silicon nitride, silicon oxide, or the like. The organic encapsulation layer 432 is disposed on a surface of the first inorganic layer 431 away from the driving backplate 410, and an orthographic projection of the organic encapsulation layer 432 on the driving backplate 410 can cover each light emitting device 421. The second inorganic layer 433 may cover the organic encapsulation layer 432 and the first inorganic layer 431 not entirely covered by the organic encapsulation layer 432, and intrusion of moisture, oxygen, etc. may be blocked by the second inorganic layer 433, and a material of the second inorganic layer 433 may include an inorganic insulating material such as silicon nitride, silicon oxide, etc.

As an example, the first and second inorganic layers 431 and 433 may be chemical vapor deposition (chemical vapor deposition, CVD) layers, the organic encapsulation layer 432 may be an Ink Jet Printing (IJP) layer, and the second inorganic layer 433 may be a CVD layer.

The touch layer 440 is disposed above the encapsulation layer 430, and the touch layer 440 includes a touch buffer layer 441, a first touch metal layer 442, a touch insulating layer 443, a second touch metal layer 444, and a touch planarization layer 445.

The touch buffer layer 441 is formed on a side of the encapsulation layer 430 facing away from the light-emitting layer driving backplate 410, and is used for forming a buffer between the touch layer 440 and the encapsulation layer 430.

The first touch metal layer 442 is formed on the surface of the touch buffer layer 441 facing away from the encapsulation layer 430, the first touch metal layer 442 is patterned to form a circuit of a specific form, for example, the first touch metal layer 442 includes a first hole, a position of the first hole corresponds to a position of the light emitting device 421, a projection of the first hole on the driving back plate 410 covers a projection of the light emitting device 421 on the driving back plate 410, and light emitted by the light emitting device 421 can be emitted through the first hole, so that the light emitted by the light emitting device 421 is not blocked by the first touch metal layer 442.

The touch insulating layer 443 is disposed above the first touch metal layer 442 and the touch buffer layer 441, the touch insulating layer 443 covers the first touch metal layer 442, the touch insulating layer 443 may be made of a material having an optical refractive index that is the first refractive index, the touch insulating layer 443 may be provided with a second hole 4431 corresponding to the position of the light emitting device 421 of the light emitting layer, and the projection of the second hole 4431 on the driving back plate 410 may cover the projection of the light emitting device 421 on the driving back plate 410. The second hole 4431 includes a first opening near the light emitting device 421 and a second opening far from the light emitting device 421, the second opening being the same shape as the first opening, the center of the second opening being on the same axis as the center of the first opening, the axis being perpendicular to the driving back plate, the second opening being larger than the first opening such that the touch insulating layer 443 has a first side surface 4432 inclined with respect to the driving back plate 410 at the second hole 4431, facilitating light emission of the light emitting device 421.

The second touch metal layer 444 is disposed above the touch insulating layer 443, i.e. the surface of the touch insulating layer 443 facing away from the touch buffer layer 441, and the second touch metal layer 444 is patterned to form a specific circuit, for example, the second touch metal layer 444 may form a plurality of electrode blocks distributed in an array. For example, the second touch metal layer 444 includes a third hole corresponding to the position of the light emitting device 421, and the projection of the third hole on the driving back plate 410 may cover the projection of the light emitting device 421 on the driving back plate, so that the light emitted by the light emitting device 421 may exit through the third hole without being blocked by the second touch metal layer 444. For example, the second touch metal layer 444 may form a mesh structure having a plurality of third holes (mesh holes), and one mesh hole (i.e., the third hole) may correspond to one or more light emitting devices 421.

The touch planarization layer 445 is disposed over the touch insulation layer 443 and the second touch metal layer 444, and the touch planarization layer 445 covers the second touch metal layer 444 and the touch insulation layer 443. The touch planarization layer 445 may be made of a material having an optical refractive index of a second refractive index, and the second refractive index is greater than the first refractive index. The touch planarization layer 445 fills the second hole 4431 of the touch insulation layer 443 to form a microlens structure.

The display panel further includes a filter layer 450, the filter layer 450 including a black light-shielding matrix 451, color filter films 452, and a filter planarization layer 453, the filter layer 450 being provided with the color filter films 452 of colors corresponding to the light-emitting devices 421, respectively, at positions corresponding to the respective colors of the light-emitting layers, the respective color filter films 452 being spaced apart from each other by the black light-shielding matrix 451 (BM).

The black light-shielding matrix is made of a light-impermeable material, and the black light-shielding matrix 451 includes a fifth hole 4511 corresponding to the position of the light-emitting device 421, for example, the black light-shielding matrix 451 includes a plurality of fifth holes 4511, the plurality of fifth holes 4511 are in one-to-one correspondence with the plurality of light-emitting devices 421, the projection of the fifth holes 4511 on the driving back plate 410 may cover the projection of the light-emitting device 421 on the driving back plate 410, the fifth holes 4511 also have a first opening facing the light-emitting device 421 and a second opening far from the light-emitting device 421, the second opening is the same shape as the first opening, the center of the second opening is on the same axis as the center of the first opening, the axis is perpendicular to the driving back plate, and the second opening of the fifth holes 4511 is larger than the first opening of the fifth holes 4511 to facilitate the light emission of the light-emitting device 421. The color filter film 452 is disposed over the black light-shielding matrix 451 and the touch layer 440, and may fill the fifth hole 4511 of the black light-shielding matrix 451. Ambient light is absorbed as it passes through the filter layer 450, achieving an anti-reflection function. The filter planarization layer 453 covers the black light-shielding matrix 451 and the color filter film 452, and may be used to planarize the filter layer 450, facilitating the placement of other functional film layers over the filter layer 450, for example, a cover plate or a protective film over the filter planarization layer 453.

In the embodiment of the application, the microlens structure is arranged in the touch layer 440 in a fusion manner, a new film structure is not additionally arranged, the touch insulating layer 443 of the touch layer 440 is formed by using a material with a low refractive index, the touch flat layer 445 of the touch layer 440 is formed by using a material with a high refractive index, the touch insulating layer 443 is subjected to imaging treatment to obtain the second hole 4431, and the touch flat layer 445 can fill the second hole 4431 to form the microlens structure. The microlens scheme provided by the embodiment of the application multiplexes the original structure of the touch layer 440 of the display panel, and does not increase the number of film layers, so that the interface is not increased, the reflectivity of the display panel is not increased, in addition, 2 masks can be saved, the number of processing procedures is reduced, and the preparation cost can be reduced because the MLA is realized by utilizing the original structure of the touch layer in the display panel. In addition, the MLA is formed closer to the light emitting device 421, has better light extraction effect, lower reflectivity, better reflection hue and comparable power consumption benefits than the structure of the MLA above the filter layer.

With continued reference to fig. 8 and 10, the touch insulating layer 443 includes a second hole 4431, and a projection of the second hole 4431 on the driving backplate 410 may cover the light emitting device, and a slope is formed at the second hole 4431. For example, the second hole 4431 includes a first opening toward the light emitting device 421 and a second opening toward the encapsulation layer 430, the second opening being the same shape as the first opening, a center of the second opening being on the same axis as a center of the first opening, the axis being perpendicular to the driving back plate, the second opening of the second hole 4431 being larger than the first opening of the second hole 4431 such that the touch insulating layer 443 has a first side surface 4432 inclined with respect to the driving back plate 410 at the second hole 4431, facilitating light exit of the light emitting device 421. The first side surface 4432 forms a first angle θ with the driving back plate 410, and the first angle θ ranges from 20 degrees to 89.9 degrees. When the light emitted by the light emitting device 421 reaches the micro-lens structure formed by the low-refractive-index touch insulating layer 443 and the high-refractive-index touch flat layer 445, the refractive indexes of the media on the two sides of the first side surface 4432 are different, and the transmission direction of the light is changed under the refraction and reflection effects of the micro-lens structure, so that the light is concentrated in the forward direction of the light emitting device 421, and the scattering to the periphery of the light emitting device 421 is reduced, thereby improving the light emitting efficiency of the display panel.

In the embodiment of the present application, the optical refractive index of the touch flat layer 445 is greater than the optical refractive index of the touch insulating layer 443, and the touch flat layer 445 may fill the second hole 4431 formed by the touch insulating layer 443, and the optical refractive index of the touch insulating layer 443 may be 1.45 to 1.55 and the optical refractive index of the touch flat layer 445 may be 1.55 to 1.8.

Since the filter layer 450 is further provided with the black light-shielding matrix 451 and the black light-shielding matrix 451 is opaque, the size of the fifth hole 4511 of the black light-shielding matrix 451 should be larger than the size of the fourth hole 4111 of the pixel defining layer 422 in order to ensure a good light-condensing effect, to avoid limiting the light emitted from the light-emitting device 421, and the size of the second hole 4431 of the touch insulating layer 443 should be larger than the size of the fourth hole 4111 of the pixel defining layer 422.

In the direction perpendicular to the driving back plate, the fourth hole 4111, the second hole 4431 and the fifth hole 4511 are aligned with the light emitting device 421, i.e., the centers of the fourth hole 4111, the second hole 4431, the fifth hole 4511 and the light emitting device 421 are located on the same axis, so that light emission affecting the light emitting device 421 can be avoided, the opening shape of the second hole 4431 is the same as the opening shape of the fourth hole 4111, and the opening shape of the fifth hole 4511 is the same as the opening shape of the fourth hole 4111.

The first opening of the second hole 4431 may be the same as the first opening of the fourth hole 4111, or the first opening of the second hole 4431 may be larger than the first opening of the fourth hole 4111, and the formed microlens structure may collect the light emitted from the light emitting device 421 at a large angle to the position right above the light emitting device 421 for emitting, so as to improve the light emitting efficiency of the display panel, and the black light shielding matrix 451 is opaque, so as to avoid affecting the light emission of the light emitting device 421, and the first opening of the fifth hole 4511 is larger than the first opening of the fourth hole 4111.

In a direction parallel to the driving back plate, the flaring distance of the first opening of the fifth hole 4511 with respect to the first opening of the fourth hole 4111 is greater than the flaring distance of the first opening of the second hole 4431 with respect to the first opening of the fourth hole 4111. In the embodiment of the present application, the projection profile formed by orthographically projecting the first opening of the fifth hole 4511 onto the driving back plate surrounds the projection profile formed by orthographically projecting the first opening of the fourth hole 4111 onto the driving back plate, and the two projection profiles have a separation distance therebetween, where the separation distance may be defined as the expansion distance of the first opening of the fifth hole 4511 relative to the first opening of the fourth hole 4111, and the expansion distance of the first opening of the fifth hole 4511 relative to the first opening of the fourth hole 4111 at different positions is the same.

The projection profile formed by the front projection of the first opening of the second hole 4431 on the driving back plate surrounds the projection profile formed by the front projection of the first opening of the fourth hole 4111 on the driving back plate, and a certain interval is formed between the two projection profiles, and the interval can be defined as the expansion distance of the first opening of the second hole 4431 relative to the first opening of the fourth hole 4111. The flared distance of the first opening of the second hole 4431 is the same at different positions with respect to the first opening of the fourth hole 4111.

Referring to fig. 11 (a), fig. 11 (a) illustrates a projection view of the first openings of the second hole 4431, the fourth hole 4111 and the fifth hole 4511 on the driving back plate, in a direction parallel to the driving back plate, the expansion distance of the first opening of the fifth hole 4511 of the black light shielding matrix 451 with respect to the first opening of the fourth hole 4111 of the pixel defining layer 422 is a, the expansion distance of the first opening of the second hole 4431 of the touch insulating layer 443 with respect to the first opening of the fourth hole 4111 of the pixel defining layer 422 is b, and in an embodiment of the present application, the value range of a may be 3 to 7um, and the value range of b may be 0 to 3um. The shape of the light emitting device 421, the second hole 4431, the fourth hole 4111, and the fifth hole 4511 in fig. 11 is exemplified by a circle, which may also be an ellipse as shown in the (B) view in fig. 11, a rectangle as shown in the (C) view in fig. 11, a polygon as shown in the (D) view in fig. 11, or other shapes.

For example, in the embodiment of the present application, please continue to refer to fig. 10, the thickness of the micro lens, that is, the distance between the surface of the touch insulating layer 443 facing the driving back plate 410 and the surface of the touch flat layer 445 facing away from the driving back plate 410 is c, and the value of c ranges from 0.5 um to 5um.

The filter layer is generally made of an organic material, and has low contact adhesion with the touch flat layer, so that film peeling (peeling) is easy to occur, fig. 12 shows a schematic view of another display panel provided by the embodiment of the application, the display panel further includes a filter substrate layer (CBL) 460, the filter substrate layer 460 may be disposed above the touch flat layer 445, the filter layer 450 may be disposed above the filter substrate layer 460, the filter substrate layer 460 may be made of an organic material, the adhesion between the touch flat layer 445 and the material of the filter layer 450 may be increased, and the reliability problems of film peeling (peeling) related to the materials are solved.

In the above example, the micro-lens structure is combined in the touch layer, and the micro-lens structure is realized by using the touch insulating layer with low refractive index and the touch flat layer with high refractive index in the touch layer, so that the light emitting efficiency of the display panel is improved, the benefit equivalent to that of arranging the micro-lens layer on the filter layer can be obtained, and the cost is lower. Fig. 13 is a schematic diagram of another display panel according to an embodiment of the present application, where MLA can be implemented by using the refractive index difference between the color filter film with high refractive index and the first refractive layer, which can also improve the light-emitting efficiency and reduce the cost of the display panel.

Referring to fig. 13, the display panel includes a driving backplate 510, a pixel defining layer 511, a light emitting layer, an encapsulation layer 530, a touch layer 540, and a filter layer 550. The filter layer 550 includes a black mask matrix 551, a first refractive layer 552, a color filter film 553, and a filter planarization layer 554.

The structures of the driving backplate 510, the pixel defining layer 511, the light emitting layer, the encapsulation layer 530, and the touch layer 540 have been described in detail in the foregoing examples, and reference may be made to the contents of the examples shown in fig. 2 to 7, which are not described in detail herein. The black mask matrix 551 may be disposed over the touch layer 540, and the black mask matrix 551 has a sixth aperture with the light emitting device 521, the sixth aperture projection onto the driving back plate 510 may cover the light emitting device 521 projection onto the driving back plate 510, the first refractive layer 552 is disposed over the touch layer 540 and the black mask matrix 551, the first refractive layer 552 covers the black mask matrix 551, and the first refractive layer 552 has a seventh aperture 5521, the seventh aperture 5521 projection onto the driving back plate 510 may cover the light emitting device 521 projection onto the driving back plate 510, the color filter film 553 is disposed over the touch layer 540 and the first refractive layer 552, the color filter film 553 covers the first refractive layer 552 and the black mask matrix 551, and the color filter film 553 fills the seventh aperture 5521 of the first refractive layer 552, wherein the first refractive layer 552 may be formed of a material with a low refractive index, the color filter film 553 may be formed of a material with a high refractive index, the optical refractive index of the first refractive layer 552 is lower than the refractive index of the color filter film, thus the optical refractive index of the first refractive layer 552 is formed of the first refractive index film 553 and the micro-lens layer 553 is formed in a flat structure with reference to the micro-filter structure of the touch layer 552 and the micro-filter layer 8 shown in the example structure.

The first refraction layer 552 includes a seventh hole 5521, and a slope is formed at the seventh hole 5521, for example, the seventh hole 5521 includes a first opening toward the light emitting device 521 and a second opening away from the light emitting device 521, the second opening being larger than the first opening, such that the first refraction layer 552 has a second side surface 5522 inclined with respect to the driving rear plate 510 at the seventh hole 5521, wherein the second side surface 5522 forms an angle θ with the driving rear plate 510 in a range of 20 degrees to 89.9 degrees.

When the light emitted from the light emitting device 521 reaches the microlens structure formed by the first refractive layer 552 with low refractive index and the color filter film 553 with high refractive index, the refractive index of the medium on both sides of the second side surface 5522 is different, and the transmission direction of the light is changed under the refraction and reflection effects of the microlens structure, so that the light is concentrated in the forward direction of the light emitting device 521, and the scattering around the light emitting device 521 is reduced, so that the light emitting efficiency of the display panel can be improved.

The first refraction layer 552 is additionally arranged in the optical filter layer 550, and the micro lens structure is realized in the optical filter layer 550 by utilizing the first refraction layer 552 and the color optical filter film 553, so that compared with the micro lens structure formed above the optical filter layer 550, the structure multiplexes the color optical filter film 553 in the optical filter layer 550 as a high refraction layer, only one film structure is required to be additionally arranged, the display performance of the display panel is effectively improved, 1 mask can be saved, the number of manufacturing procedures is reduced, and the preparation cost can be reduced.

In the foregoing examples, the implementation of the microlens structure in the touch layer and the implementation of the microlens structure in the filter layer are described respectively, and fig. 14 shows a schematic structural diagram of another display panel provided in an embodiment of the present application, where the structures of the touch layer and the filter layer are comprehensively utilized to implement the microlens structure, so that the efficiency of the display panel is improved, and the manufacturing cost is reduced.

Referring to fig. 14, the display panel includes a driving back plate 610, a pixel defining layer 611, a light emitting layer, an encapsulation layer 630, a touch layer 640, and a filter layer 650. The structure and principle of the driving backplate 610, the light emitting layer and the encapsulation layer 630 can be referred to the examples provided in fig. 2 to 8, and will not be described here.

The touch layer 640 includes a touch buffer layer 641, a first touch metal layer 642, a touch insulating layer 643 and a second touch metal layer 644, wherein the touch buffer layer 641 is disposed on a side of the encapsulation layer 630 facing away from the light emitting layer, the first touch metal layer 642 is disposed above the touch buffer layer 641, the first touch metal layer 642 includes a plurality of holes, and projections of the holes of the first touch metal layer 642 on the driving back plate 610 can cover projections of the light emitting device 621 on the driving back plate 610. The touch insulating layer 643 is disposed over the touch buffer layer 641 and the first touch metal layer 642, and the touch insulating layer 643 covers the first touch metal layer 642. The second touch metal layer 644 is disposed on the touch insulation layer 643, the second touch metal layer 644 includes a plurality of holes, and a projection of the holes of the second touch metal layer 644 on the driving back plate 610 may cover a projection of the light emitting device 621 on the driving back plate 610.

The display panel further includes a filter layer 650, the filter layer 650 including a first refractive layer 651, a color filter film 652, a black light shielding matrix 653, and a filter flat layer 654, wherein the first refractive layer 651 is disposed over the touch insulating layer 643 and the second touch metal layer 644, the first refractive layer 651 includes an eighth hole 6511, a projection of the eighth hole 6511 onto the driving backplate 610 may cover a projection of the light emitting device 621 onto the driving backplate 610, and the first refractive layer 651 forms a slope at the eighth hole 6511. For example, the eighth hole 6511 includes a first opening near the light emitting device 621 and a second opening far from the light emitting device 621, the second opening being larger than the first opening, such that the eighth hole 6511 has a third side surface 6512 inclined with respect to the driving back plate 610, wherein the third side surface 6512 forms an angle θ with the driving back plate 610 in a range of 20 degrees to 89.9 degrees.

The color filter film 652 is disposed over the touch insulation layer 643 and the first refractive layer 651, and the color filter film 652 fills the eighth hole 6511 of the first refractive layer 651. For example, the optical refractive index of the first refractive layer 651 is smaller than that of the color filter film 652, for example, the optical refractive index of the first refractive layer 651 may be 1.45-1.55, the optical refractive index of the color filter film 652 may be 1.55-1.8, the eighth hole 6511 of the color filter film 652 filled in the first refractive layer 651 forms a microlens structure, when the light emitted by the light emitting device 621 reaches the microlens structure, the transmission direction of the light is changed under the refraction and reflection effects due to the difference of the optical refractive indexes of the mediums at the two sides of the third side surface 6512, so that the light is concentrated in the forward direction of the light emitting device 621, and the light emitting efficiency of the display panel can be improved.

The black light shielding matrix 653 is disposed above the first refractive layer 651 and the color filter film 652, the black light shielding matrix 653 includes a plurality of holes corresponding to positions of the light emitting devices 621, a projection of the holes on the driving back plate 610 covers a projection of the corresponding light emitting devices 621 on the driving back plate 610, light emitted from the light emitting devices 621 can be emitted through the holes of the black light shielding matrix 653, and the filter flat layer 654 is disposed above the black light shielding matrix 653 and the color filter film 652.

In the embodiment of the application, the touch layer 640 and the filter layer 650 are combined together to realize a micro-lens structure, so that the light emitting efficiency of the display panel is improved, the touch layer 640 is not provided with a touch flat layer, the filter layer 650 is additionally provided with the first refractive layer 651, the first refractive layer 651 covers the second touch metal layer 644 of the touch layer 640, the eighth hole 6511 corresponding to the light emitting device 621 is formed, the color filter film 652 with higher optical refractive index than the first refractive layer 651 can cover the first refractive layer 651, and the eighth hole 6511 of the first refractive layer 651 is filled to form the micro-lens structure, so that 2 masks can be saved, the number of processing procedures can be reduced, and the preparation cost can be reduced.

Referring to fig. 15, the display module further includes a supporting layer 710, a display panel 720, and a cover plate 730, where the supporting layer 710 is adhered to the display panel 720 by a glue layer, and the display panel 720 is adhered to the cover plate by a glue layer, and the glue layer may be optical glue (OCA).

The supporting layer 710 is used for providing mechanical support and protection for the display panel 720, and can also perform the functions of shielding light, isolating signals, conducting electricity, etc., and the display panel 720 can be the display panel provided by the examples shown in fig. 8-14 in the present application. The cover plate 730 is used to provide protection for the display panel, and the cover plate 730 may be, for example, a glass cover plate.

The embodiment of the application also provides electronic equipment, which comprises a shell and the display module provided by the previous example, wherein the display module is arranged on the shell. The electronic device may be, for example, a mobile phone (mobile phone), a personal computer (personal computer, PC), a tablet (pad), a smart wearable product (e.g., a smart watch, a smart bracelet), a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, an in-vehicle terminal, a display, or the like.

In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A display panel, the display panel comprising:

A drive back plate;

The light-emitting layer comprises a light-emitting device, and the light-emitting device is arranged on the driving backboard;

the touch control layer is positioned above the light-emitting layer and comprises a first touch control metal layer, a touch control insulating layer, a second touch control metal layer and a touch control flat layer, wherein the touch control insulating layer is arranged between the first touch control metal layer and the second touch control metal layer;

The first touch metal layer comprises a first hole, the touch insulating layer comprises a second hole, the second touch metal layer comprises a third hole, and projections of the first hole, the second hole and the third hole on the driving backboard cover projections of the light emitting device on the driving backboard;

The touch control flat layer is arranged above the second touch control metal layer and the touch control insulating layer, the second hole is filled with the touch control flat layer, and the optical refractive index of the touch control insulating layer is smaller than that of the touch control flat layer.

2. The display panel of claim 1, comprising a pixel defining layer disposed over the drive backplate, the pixel defining layer comprising a fourth aperture comprising a first opening proximate to the drive backplate and a second opening distal from the drive backplate, the second opening of the fourth aperture being larger than the first opening of the fourth aperture, the light emitting device disposed in the fourth aperture.

3. The display panel according to claim 2, wherein the light emitting device is plural, the pixel defining layer includes plural fourth holes, the plural light emitting devices are in one-to-one correspondence with the plural fourth holes, and the touch insulating layer includes plural second holes, the plural light emitting devices are in one-to-one correspondence with the plural second holes.

4. The display panel of claim 3, further comprising a filter layer comprising a black light blocking matrix and a color filter film;

The black shading matrix is arranged above the touch control layer, the black shading matrix comprises a fifth hole, the fifth hole comprises a first opening close to the driving back plate and a second opening far away from the driving back plate, the second opening of the fifth hole is larger than the first opening of the fifth hole, and the projection of the fifth hole on the driving back plate covers the projection of the light emitting device on the driving back plate;

the color filter film is arranged above the black shading matrix and the touch control layer.

5. The display panel of claim 4, wherein the filter layer further comprises a filter planarization layer disposed over the black light blocking matrix and the color filter film.

6. The display panel of claim 5, wherein the second hole includes a first opening near the driving back plate and a second opening far from the driving back plate, the second opening of the second hole being larger than the first opening of the second hole, the touch insulating layer having a side surface inclined with respect to the driving back plate at the second hole, wherein the side surface forms an angle with the driving back plate in a range of 20 degrees to 89.9 degrees.

7. The display panel of claim 6, wherein the fourth hole, the second hole, and the fifth hole are aligned with the light emitting device in a direction perpendicular to the driving back plate.

8. The display panel according to claim 7, wherein a first opening of the second hole of the touch insulating layer is larger than a first opening of the fourth hole of the pixel defining layer, and a flaring distance of the first opening of the second hole of the touch insulating layer with respect to the first opening of the fourth hole of the pixel defining layer is 0 to 3 micrometers in a direction parallel to the driving back plate.

9. The display panel according to any one of claims 1 to 8, wherein a distance between a surface of the touch insulating layer facing the driving back plate and a surface of the touch flat layer facing away from the driving back plate is 0.5 micrometers to 5 micrometers.

10. The display panel according to any one of claims 1 to 9, wherein the optical refractive index of the touch insulating layer is 1.45 to 1.55, and the optical refractive index of the touch flat layer is 1.55 to 1.8.

11. The display panel according to claim 7, wherein a first opening of a fifth hole of the black light shielding matrix is larger than a first opening of the fourth hole of the pixel defining layer, and the first opening of the fifth hole is flared by a distance of 3 to 7 μm with respect to the first opening of the fourth hole in a direction parallel to the driving back plate.

12. The display panel according to any one of claims 4 to 11, further comprising a filter substrate layer disposed between the touch layer and the filter layer.

13. The display panel of any one of claims 1-12, further comprising an encapsulation layer disposed over the light emitting layer, the touch layer being disposed over the encapsulation layer.

14. The display panel of claim 13, wherein the touch layer further comprises a touch buffer layer disposed between the first touch metal layer and the encapsulation layer.

15. A display panel, the display panel comprising:

A drive back plate;

the touch control layer is positioned above the light-emitting layer;

The optical filter layer is positioned above the touch control layer and comprises a black shading matrix, a first refraction layer and a color optical filter film;

The black shading matrix is arranged above the touch control layer, the black shading matrix comprises a sixth hole, the first refraction layer is arranged above the black shading matrix, the first refraction layer comprises a seventh hole, and the projection of the sixth hole and the seventh hole on the driving backboard covers the projection of the light emitting device on the driving backboard;

The color filter film is arranged above the first refraction layer and the touch control layer, the seventh hole is filled with the color filter film, and the optical refractive index of the first refraction layer is lower than that of the color filter film.

16. The display panel of claim 15, wherein the first refractive layer has a side surface at the seventh aperture that is inclined with respect to the driving back plate, wherein the side surface forms an angle with the driving back plate, the angle ranging from 20 degrees to 89.9 degrees.

17. The display panel according to claim 15 or 16, wherein the first refractive layer has an optical refractive index of 1.45-1.55, and the color filter film has an optical refractive index of 1.55-1.8.

18. A display panel, the display panel comprising:

A drive back plate;

The touch layer comprises a touch buffer layer, a first touch metal layer, a touch insulating layer and a second touch metal layer which are sequentially arranged;

The first refraction layer is arranged above the second touch metal layer and the touch insulation layer, and comprises an eighth hole, and the projection of the eighth hole on the driving backboard covers the projection of the light-emitting device on the driving backboard;

The color filter film is arranged on the first refraction layer and the touch insulating layer, the eighth hole is filled with the color filter film, and the optical refractive index of the first refraction layer is lower than that of the color filter film.

19. The display panel of claim 18, further comprising a black light-shielding matrix disposed on the first refractive layer and the color filter film, the black light-shielding matrix including openings whose projections onto the driving back plate cover the projections of the light emitting devices onto the driving back plate.

20. The display panel of claim 18 or 19, wherein the first refractive layer has a side surface inclined with respect to the driving back plate at the eighth hole, wherein the side surface forms an angle with the driving back plate, the angle ranging from 20 degrees to 89.9 degrees.

21. The display panel according to any one of claims 18 to 20, wherein the first refractive layer has an optical refractive index of 1.45 to 1.55, and the color filter film has an optical refractive index of 1.55 to 1.8.

22. A display module assembly, characterized in that, the display module assembly includes supporting layer, display panel and the apron that sets gradually, display panel with the supporting layer bonds, display panel with the apron bonds, display panel is the display panel of any one of claims 1~ 21.

23. An electronic device, comprising a display module and a housing, wherein the display module is the display module of claim 22, and the display module is connected to the housing.