CN112542496A

CN112542496A - Display panel

Info

Publication number: CN112542496A
Application number: CN202011397025.1A
Authority: CN
Inventors: 魏现鹤; 王宏宇; 曹方义
Original assignee: Yungu Guan Technology Co Ltd
Current assignee: Yungu Guan Technology Co Ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-03-23
Anticipated expiration: 2040-12-03
Also published as: CN112542496B

Abstract

The invention discloses a display panel. The display panel includes: the base assembly comprises a substrate and a first adhesive tape layer; the supporting film is positioned on one side, away from the substrate, of the first adhesive tape layer and comprises a first opening, so that the base assembly is provided with a first area corresponding to the first opening and a second area surrounding at least part of the boundary line of the first area, the base assembly is provided with an optical adjusting area at least covering the boundary line of the first area, on the surface parallel to the base assembly, the preset light property of the optical adjusting area is gradually changed in the direction radiating from the center of the first area to the periphery, and the optical property is at least one of light transmittance or refractive index. According to the display panel provided by the embodiment of the invention, the brightness difference between the first area and the second area is visually weakened, so that the visual effect of the display panel when the display screen is displayed is improved.

Description

Display panel

Technical Field

The invention relates to the field of display, in particular to a display panel.

Background

An Active Matrix (AM) driving technique is a display driving technique in which a Thin Film Transistor (TFT) array is used to control each pixel to emit light, and in an AM-driven display panel, each pixel operates independently and is driven continuously, and thus, the AM-driven display panel has the advantages of low driving voltage, low power consumption, long service life, and the like.

Along with the application of technologies such as fingerprint under the present screen, camera under the screen, display panel can include first region and the second area that the luminousness is different, wherein with the multiplexing region of optical function such as fingerprint identification, image acquisition of the first region multiplexing that the luminousness is higher. When the display panel is combined with a fingerprint identification device, an image acquisition device and the like, a light absorption supporting layer is arranged on one side of a substrate of the display panel, and the supporting layer needs to be opened in a corresponding area of a first area. In this case, when the display panel is displaying, the first area and the second area have a significant brightness difference, and a visually significant uneven display phenomenon of brightness and darkness occurs.

Disclosure of Invention

The invention provides a display panel, which alleviates the phenomenon of uneven visual brightness display.

In a first aspect, an embodiment of the present invention provides a display panel, which includes: the base assembly comprises a substrate and a first adhesive tape layer, wherein the substrate comprises a first surface and a second surface which are opposite, and the first adhesive tape layer is positioned on the side of the second surface of the substrate; the supporting film is positioned on one side, away from the substrate, of the first adhesive tape layer and comprises a first opening, so that the base assembly is provided with a first area corresponding to the first opening and a second area surrounding at least part of the boundary line of the first area; the driving array layer is positioned on the side of the first surface of the substrate; and the light-emitting element layer is positioned on one side of the driving array layer, which is far away from the substrate, wherein the base assembly is provided with an optical adjusting area at least covering the boundary line of the first area, on the surface parallel to the base assembly, the preset light property of the optical adjusting area is gradually changed in the direction radiating from the center of the first area to the periphery, and the optical property is at least one of light transmittance or refractive index.

According to the foregoing embodiment of the first aspect of the present invention, the optical adjustment region includes a first optical adjustment region that coincides with the first region, and the optical transmittance of the first optical adjustment region decreases in a direction radiating from the center to the periphery of the first region.

According to any one of the preceding embodiments of the first aspect of the invention, in the first optical adjustment region, the light transmittance of the substrate decreases in a direction radiating from the center to the periphery of the first region.

According to any of the foregoing embodiments of the first aspect of the present invention, the base assembly further includes a second adhesive tape layer, the second adhesive tape layer is located on the second surface side of the substrate, the second adhesive tape layer covers the first area, and the light transmittance of the second adhesive tape layer decreases in a direction from the center of the first area to the periphery.

According to any of the foregoing embodiments of the first aspect of the present invention, the first tape layer includes a second opening corresponding to the first opening.

According to any one of the preceding embodiments of the first aspect of the invention, the optical adjustment region comprises a second optical adjustment region covering a border line of the first region and disposed around an outer periphery of the first region, and a reflectance of the second optical adjustment region decreases in a direction radiating from a center of the first region to a periphery.

According to any one of the embodiments of the first aspect of the present invention, the substrate assembly further includes a light reflecting layer disposed on at least one of the first surface and the second surface of the substrate, the light reflecting layer is disposed in the second optical adjustment region, and the reflectivity of the light reflecting layer decreases in a direction radiating from the center to the periphery of the first region.

According to any of the foregoing embodiments of the first aspect of the present invention, in the second optical adjustment region, the reflectivity of the first tape layer decreases in a direction radiating from the center to the periphery of the first region.

According to any one of the embodiments of the first aspect of the present invention, any one of the predetermined points on the outer edge line of the second optical adjustment area is connected to the center of the first area as a virtual line segment, the boundary line of the virtual line segment and the first area intersects at the virtual point, and the distance between the predetermined point and the virtual point is greater than or equal to the distance between the virtual point and the center of the first area.

According to any of the foregoing embodiments of the first aspect of the present invention, the first tape layer is a yellow tape layer.

According to the display panel provided by the embodiment of the invention, the substrate assembly is provided with a first area corresponding to the first opening, and the display panel can transmit light in the first area, so that the first area can be used as a multiplexing area with a photosensitive function. The support film of the display panel is usually a light absorbing layer, and therefore, a first opening needs to be disposed on the support film to meet the photosensitive requirement of the photosensitive element corresponding to the first opening. The first area corresponds to the first opening, at the moment, the substrate of the first area and the air at the first opening generate more reflected light at the interface due to the difference of refractive indexes, and the substrate of the second area has less reflected light due to the existence of the supporting film, so that the irradiation amount of the reflected light on the driving array layer of the first area is different from the irradiation amount of the reflected light on the driving array layer of the second area, and the device characteristics of the first area are different from the device characteristics of the second area. In the embodiment of the invention, the substrate assembly is provided with the optical adjusting area at least covering the boundary line of the first area, on the surface parallel to the substrate assembly, the preset light property of the optical adjusting area is gradually changed in the direction radiating from the center of the first area to the periphery, the optical property is at least one of light transmittance or refractive index, so that the irradiation amount of the reflected light received by the device in the first area is gradually changed near the boundary line of the first area, the display brightness of the display panel is also gradually changed near the boundary line of the first area, the brightness difference between the first area and the second area is visually weakened, and the visual effect of the display panel in displaying the picture is improved.

Drawings

Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.

Fig. 1 is a schematic top view of a display panel according to a first embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic cross-sectional view illustrating a combination of a display panel and a photosensitive element according to a first embodiment of the present invention;

FIG. 4 is a schematic top view of a display panel according to a second embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is a schematic top view of a display panel according to a third embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view taken along line C-C of FIG. 6;

FIG. 8 is an enlarged partial schematic view of region D of FIG. 6;

fig. 9 is a schematic top view of a display panel according to a fourth embodiment of the invention;

fig. 10 is a schematic cross-sectional view taken along line E-E of fig. 9.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.

An embodiment of the present invention provides a display panel, wherein the display panel may be an Organic Light Emitting Diode (OLED) display panel. The display panel may be combined with functional devices such as an optical fingerprint recognition device, an image capture device, and the like. The display panel of the embodiments of the present invention may be presented in various forms, some examples of which will be described below.

Fig. 1 is a schematic top view of a display panel 100 according to a first embodiment of the present invention, and fig. 2 is a schematic cross-sectional view taken along a-a direction in fig. 1. The display panel 100 includes a substrate assembly 110, a support film 170, a driving array layer 120, and a light emitting device layer 130.

The base assembly 110 includes a substrate 111 and a first tape layer 112. The substrate 111 includes a first surface S1 and a second surface S2 opposite to each other, and the first tape layer 112 is located on the second surface S2 side of the substrate 111. The substrate 111 is a light-transmitting layer. The substrate 111 may be a single layer structure, which may be a rigid substrate 111 such as a glass layer, or a flexible substrate 111 such as a Polyimide (PI) layer. The substrate 111 may also be a composite layer, i.e. it may comprise a plurality of sub-layers arranged in a stack, wherein the sub-layers may be organic layers such as PI layers, or inorganic layers such as silicon oxide (SiO) layers, silicon nitride (SiN) layers.

The support film 170 is located on a side of the first tape layer 112 facing away from the substrate 111. The support film 170 includes the first opening P1 such that the substrate assembly 110 has a first area DA1 corresponding to the first opening P1 and a second area DA2 surrounding at least a portion of a boundary line BD of the first area DA 1.

The driving array layer 120 is located at the first surface S1 side of the substrate 111. In this embodiment, the OLED display panel 100 is an Active Matrix (AM) OLED display panel 100, which uses a Thin Film Transistor (TFT) array to control each light emitting element to emit light. For example, the driving array layer 120 may include a plurality of pixel circuits arranged in an array, and the circuit structure of the pixel circuit is any one of a 2T1C circuit, a 7T1C circuit, a 7T2C circuit, or a 9T1C circuit. Herein, the "2T 1C circuit" refers to a pixel circuit including 2 thin film transistors (T) and 1 capacitor (C) in the pixel circuit, and the other "7T 1C circuit", "7T 2C circuit", "9T 1C circuit", and the like.

The light emitting element layer 130 is located on a side of the driving array layer 120 facing away from the substrate 111. The light emitting element layer 130 may include a plurality of light emitting elements arranged in an array, wherein the light emitting elements are OLED light emitting elements. Alternatively, each light emitting element is electrically connected to a corresponding one of the pixel circuits, so that the pixel circuit drives the corresponding light emitting element to emit light.

A thin film transistor in a pixel circuit generally includes an active layer and a gate electrode disposed to be insulated from the active layer by a gate insulating layer. The active layer has a conductive channel between the source region and the drain region when an on-voltage is applied to the gate electrode. When the conductive channel of the thin film transistor is irradiated by light, a photo-induced leakage current is easily generated, and the characteristics of the thin film transistor are changed by long-time illumination.

According to the display panel 100 of the embodiment of the invention, the substrate assembly 110 has the first area DA1 corresponding to the first opening P1, and the display panel 100 can transmit light in the first area DA1, so that the first area DA1 can serve as a multiplexing area of a photosensitive function. Optionally, the overall light transmittance of the display panel 100 in the first area DA1 is greater than that in the second area DA2, so as to improve the light transmittance of the photosensitive function multiplexing area, i.e., the first area DA1, and facilitate the integration of photosensitive elements in the first area DA 1.

In the present embodiment, the substrate assembly 110 is provided with an optical adjustment region covering at least the boundary line BD of the first area DA1, and on a plane parallel to the substrate assembly 110, the predetermined light property of the optical adjustment region is graded in a direction K1 radiating from the center O1 of the first area DA1 to the periphery, and the optical property is at least one of light transmittance or refractive index. For example, in the first embodiment, the optical adjustment regions include the first optical adjustment region TA1 coinciding with the first area DA1, and the light transmittance of the first optical adjustment region TA1 decreases in the direction K1 radiating from the center O1 of the first area DA1 toward the periphery on the face parallel to the substrate assembly 110.

Fig. 3 is a schematic cross-sectional view illustrating the combination of the display panel 100 and the photosensitive element according to the first embodiment of the present invention.

The photosensitive element 900 is disposed corresponding to the first area DA1, and the photosensitive element 900 is located on the second surface S2 side of the substrate 111. The light sensing element 900 may be an optical fingerprint recognition device such that the first area DA1 is multiplexed as a fingerprint recognition area. Of course, in some other alternative embodiments, the photosensitive element 900 may also be an image capture device or a light sensor, such that the first area DA1 is multiplexed into an area with corresponding functions.

Taking the photosensitive element 900 as an optical fingerprint identification device as an example, the supporting film 170 of the display panel 100 is usually a light absorbing layer, and therefore the first opening P1 needs to be disposed on the supporting film 170 to satisfy the photosensitive requirement of the photosensitive element corresponding to the first opening P1. When fingerprint recognition is performed, external light can reach the photosensitive element 900 through the first area DA1 of the display panel 100 and the first opening P1 of the support film 170, and fingerprint recognition is performed.

When the display is performed, the first area DA1 corresponds to the first opening P1, and when the external light L1 irradiates the first area DA1 and the second area DA2 of the display panel 100, the first area DA1 of the substrate 111 and the air at the first opening P1 generate more reflected light at the interface due to the difference in refractive index, and the second area DA2 of the substrate 111 reflects less reflected light due to the existence of the support film 170, so that the irradiation amount of the reflected light to the driving array layer 120 corresponding to the first area DA1 is different from the irradiation amount of the reflected light to the driving array layer 120 corresponding to the second area DA2, and the device characteristics corresponding to the first area DA1 are different from the device characteristics corresponding to the second area DA 2. In the embodiment of the invention, the substrate assembly 110 is provided with the optical adjustment region covering the boundary line BD of the first area DA1, the preset light property of the optical adjustment region is gradually changed in the direction K1 radiating from the center O1 of the first area DA1 to the periphery, the optical property is at least one of light transmittance or refractive index, so that the irradiation amount of the reflected light received by the device corresponding to the first area DA1 is gradually changed near the boundary line BD of the first area DA1, the display brightness of the display panel 100 is gradually changed near the boundary line BD of the first area DA1, the brightness difference between the first area DA1 and the second area DA2 is visually weakened, and the visual effect of the display panel 100 in displaying the picture is improved.

In the first embodiment, the optical adjustment region includes the first optical adjustment region TA1 coinciding with the first area DA1, and the light transmittance of the first optical adjustment region TA1 decreases in the direction K1 radiating from the center O1 of the first area DA1 toward the periphery. When the external light L1 is irradiated to the first and second areas DA1 and DA2 of the display panel 100, the amount of reflected light that the substrate assembly 110 can generate also gradually decreases in the direction K1 that radiates from the center O1 of the first area DA1 to the periphery. Therefore, the irradiation amount of the reflected light received by the devices in the first area DA1 is gradually reduced in the direction K1 radiating from the center O1 of the first area DA1 to the periphery, so that the display brightness is gradually changed from the center O1 of the first area DA1 to the direction of the second area DA2, and the brightness difference between the first area DA1 and the second area DA2 is visually weakened, thereby improving the visual effect of the display panel 100 and the display module when displaying the picture.

Alternatively, in the first optical adjustment region TA1, the light transmittance of the substrate 111 decreases in the direction K1 radiating from the center O1 of the first area DA1 toward the periphery, thereby realizing gradual change in the light transmittance of the first optical adjustment region TA 1.

In order to realize that the transmittance of the substrate 111 of the first optical adjustment region TA1 decreases in the direction K1 radiating from the center O1 of the first area DA1 toward the periphery, the substrate 111 may be subjected to a transparentization process to various degrees, thereby realizing a gradual transmittance change of the substrate 111 in a predetermined area. Taking the substrate 111 as a PI layer as an example, the transparentization process for the substrate 111 is a modification process for a PI material, for example, and when the substrate 111 is manufactured, the modification process is performed to different degrees in the direction K1 in which the portion 111 of the first substrate 111 is radiated from the center O1 of the first area DA1 to the periphery. The process of performing the transparentization treatment to the substrate 111 to different degrees may not be limited to the above example, for example, the substrate 111 is a composite layer, that is, it may include a plurality of sublayers disposed in a stack, and the light transmittance gradation of the substrate 111 may also be realized by configuring different materials and/or thicknesses of the sublayers for different regions of the substrate 111 of the first optical adjustment region TA1 in the direction K1 radiating from the center O1 of the first region DA1 to the periphery.

Optionally, the first tape layer 112 includes a second opening P2 corresponding to the first opening P1, and the first area DA1 corresponds to the first opening P1 and the second opening P2, so that the display panel 100 has a higher light transmittance in the first area DA 1.

In some embodiments, the display panel 100 may further include an encapsulation layer 150 and a cover plate 160, wherein the encapsulation layer 150 is located on a side of the light emitting element layer 130 facing away from the substrate 111, and the encapsulation layer 150 may cover the plurality of light emitting elements of the light emitting element layer 130. The cover plate is located on a side of the encapsulation layer 150 facing away from the substrate 111.

When the optical adjustment region includes the first optical adjustment region TA1 coinciding with the first area DA1, the manner of achieving the gradual change of the predetermined light property of the first optical adjustment region TA1 may not be limited to the above example, and the gradual change of the optical property of the first optical adjustment region TA1 of the substrate assembly 110 may be configured in other manners.

Fig. 4 is a schematic top view of a display panel 100 according to a second embodiment of the invention, and fig. 5 is a schematic cross-sectional view taken along the direction B-B in fig. 4. The second embodiment is the same in part structure as the first embodiment, and the differences will be described below, and the same parts will not be described in detail.

In the second embodiment, the base assembly 110 further includes a second tape layer 113, the second tape layer 113 is disposed on the second surface S2 side of the substrate 111, the second tape layer 113 covers the first area DA1, and the light transmittance of the second tape layer 113 decreases in a direction K1 radiating from the center O1 of the first area DA1 to the periphery, so that the light transmittance of the first optical adjustment region TA1 decreases in a direction K1 radiating from the center O1 of the first area DA1 to the periphery.

Optionally, the first tape layer 112 includes a second opening corresponding to the first opening P1, and the second tape layer 113 may be disposed at the second opening. In some embodiments, the first tape layer 112 may not include the second opening, and the second tape layer 113 may be disposed on a side of the first tape layer 112 facing away from the substrate 111.

In the display panel 100 of the embodiment of the invention, the optical adjustment region is not limited to include the first optical adjustment region TA1 coinciding with the first area DA 1. In other embodiments, the optical adjustment region may include a borderline BD covering the first area DA1 and surrounding the second optical adjustment region TA2 disposed at the outer periphery of the first area DA 1. Also, in some embodiments, some of the display panel 100 structures when the optical adjustment region includes the first optical adjustment region TA1 may be combined with some of the display panel 100 structures when the optical adjustment region includes the second optical adjustment region TA2, i.e., the optical adjustment region may include both the first optical adjustment region TA1 and the second optical adjustment region TA 2.

Fig. 6 is a schematic top view of a display panel 100 according to a third embodiment of the present invention, and fig. 7 is a schematic cross-sectional view taken along the direction C-C in fig. 6. The third embodiment is the same in part structure as the first embodiment, and the differences therebetween will be described below, and the same parts will not be described in detail.

In the third embodiment, the optical adjustment region includes the second optical adjustment region TA2 covering the boundary line BD of the first area DA1 and surrounding the outer periphery of the first area DA1, and the reflectance of the second optical adjustment region TA2 decreases in the direction K1 radiating from the center O1 of the first area DA1 to the periphery on the plane parallel to the substrate assembly 110.

When the display panel 100 is irradiated with external light, the light absorbing support film 170 is disposed in the second area DA 2. The substrate 111 of the first area DA1 and the air at the first opening P1 generate more reflected light at the interface due to the difference in refractive index, and the second optical adjustment area TA2 is adjacent to the first area DA1 and disposed around the periphery of the first area DA1, so that at the periphery adjacent to the first area DA1, the base assembly 110 can also generate some reflected light, and the difference between the display brightness of the area adjacent to the first area DA1 in the second area DA2 and the display brightness of the first area DA1 is reduced, so that the brightness difference between the first area DA1 and the second area DA2 is visually reduced, and the visual effect of the display panel 100 when displaying a picture is improved.

Optionally, the base assembly 110 further includes a light reflecting layer 114, the light reflecting layer 114 is disposed on at least one of the first surface S1 and the second surface S2 of the substrate 111, the light reflecting layer 114 is disposed in the second optical adjustment area TA2, and the reflectivity of the light reflecting layer 114 decreases in a direction K1 radiating from the center O1 of the first area DA1 to the periphery.

For example, in the present embodiment, the light reflecting layer 114 is located on the second surface S2 of the substrate 111. The light reflecting layer 114 can reflect light. The light reflecting layer 114 is adjacent to the first area DA1 and surrounds the periphery of the first area DA1, so that at the periphery adjacent to the first area DA1, the substrate assembly 110 can also generate some reflected light and form a gradient of reflectivity change, which visually weakens the brightness difference between the first area DA1 and the second area DA 2.

Optionally, the light reflecting layer 114 includes at least one of a silver reflecting layer, a carbon nanotube layer. For example, a silver reflective layer may be formed on the first surface S1 and/or the second surface S2 of the substrate 111 through an evaporation process, or a carbon nanotube layer may be formed on the first surface S1 and/or the second surface S2 of the substrate 111 through a spin coating process. The silver material or the carbon nanotube can realize a predetermined light reflection capability with a lower film thickness, which facilitates the thinning of the display panel 100.

Fig. 8 is a partially enlarged schematic view of a region D in fig. 6. Alternatively, any one of the preset points H1 on the outer edge line of the second optical adjustment region TA2 is connected to the center O1 of the first area DA1 as a virtual line segment M1, the boundary line BD between the virtual line segment M1 and the first area DA1 intersects at the virtual point H2, and the distance D1 between the preset point H1 and the virtual point H2 is greater than or equal to the distance D2 between the virtual point H2 and the center O1 of the first area DA1, so that the area of the second optical adjustment region TA2 on the display panel 100 has a sufficient width, thereby being capable of more significantly reducing the visual difference in luminance between the second optical adjustment region TA2 and the first area DA 1. In the present embodiment, the first area DA1 is described as an example of a circle, and the distance D2 between the virtual point H2 and the center O1 of the first area DA1 is the radius of the first area DA 1. The orthographic projection of the second optical adjustment region TA2 on the substrate 111 is circular ring-shaped, and the width thereof is the distance D1 between the preset point H1 and the virtual point H2, wherein the width of the circular ring-shaped second optical adjustment region TA2 is greater than or equal to the radius of the first area DA1, for example, equal. In other embodiments, the shape of the first area DA1 and the orthographic projection shape of the second optical adjustment area TA2 on the substrate 111 are not limited to the above examples, and may be other shapes such as an ellipse and a polygon. For example, the first area DA1 has a square shape, the orthogonal projection of the second optical adjustment region TA2 on the substrate 111 has a square ring shape, and the width of the square ring-shaped second optical adjustment region TA2 is equal to the side length of the first area DA 1.

When the optical adjustment region includes the boundary line BD covering the first area DA1 and surrounds the second optical adjustment region TA2 disposed at the outer periphery of the first area DA1, the manner of implementing the preset light property gradation of the second optical adjustment region TA2 may not be limited to the above-described example, and the gradation optical property of the second optical adjustment region TA2 of the substrate assembly 110 may be configured in other manners.

Fig. 9 is a schematic top view of a display panel 100 according to a fourth embodiment of the invention, and fig. 10 is a schematic cross-sectional view taken along the direction E-E in fig. 9. The fourth embodiment is the same in part structure as the third embodiment, and differences therebetween will be described below, and the same portions will not be described in detail.

In the fourth embodiment, in the second optical adjustment region TA2, the reflectance of the first tape layer 112 decreases in the direction K1 of radiating from the center O1 of the first area DA1 to the periphery, thereby achieving that the reflectance of the second optical adjustment region TA2 decreases in the direction K1 of radiating from the center O1 of the first area DA1 to the periphery.

Optionally, first tape layer 112 includes a first tape portion 112a and a second tape portion 112 b. The first tape portion 112a is adjacent to the first area DA1 and surrounds the outer circumference disposed at the first area DA 1. The second tape portion 112b is disposed around the outer periphery of the first tape portion 112 a. The reflectivity of the first tape portion 112a is greater than the reflectivity of the second tape portion 112b, so that the quantity of the reflected light at the first tape portion 112a is greater than the quantity of the reflected light at the second tape portion 112b, and the quantity of the reflected light irradiated from the substrate 111 side to the driving array layer 120 decreases from the first area DA1 to the area corresponding to the first tape portion 112a and the area corresponding to the second tape portion 112b, so as to reduce the difference in the boundary brightness between the first area DA1 and the second area DA2, thereby improving the visual effect of the display panel 100 and the display module when displaying the picture.

Alternatively, the reflectance of the first tape portion 112a decreases in the direction K1 radiating from the center O1 of the first area DA1 toward the periphery, that is, in the direction away from the first area DA1, so that the amount of reflected light generated by the area corresponding to the first tape portion 112a forms a gradual change from the boundary line BD of the first area DA1 toward the periphery. When the display panel 100 is irradiated by the external light, the irradiation amount of the reflected light received by the TFTs in the area corresponding to the first tape portion 112a gradually decreases from the boundary line BD of the first area DA1 toward the peripheral direction, so that the display luminance also gradually changes from the center O1 of the first area DA1 toward the direction K1 of the peripheral radiation, the luminance display difference is graded over a larger display area, the luminance difference between the first area DA1 and the second area DA2 is further visually reduced, and the visual effect when the display screen is displayed is improved.

Optionally, the reflectivity of at least a portion of the first tape layer 112 is greater than the reflectivity of the support film 170. For example, the first tape layer 112 is a yellow tape layer, and an orthographic projection of the first tape layer 112 on the substrate 111 may correspond to the second area DA2, i.e. covering the second area DA2, and the first area DA1 corresponds to the first opening P1. Because the reflectivity of the first tape layer 112 is greater than that of the support film 170, some reflected light can be generated at the substrate 111 of the second area DA2, and the display brightness difference between the second area DA2 and the first area DA1 is reduced, so that the brightness difference between the first area DA1 and the second area DA2 is visually weakened, and the visual effect of the display panel 100 and the display module when displaying the picture is improved.

In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, comprising:

the substrate assembly comprises a substrate and a first adhesive tape layer, wherein the substrate comprises a first surface and a second surface which are opposite, and the first adhesive tape layer is positioned on the side of the second surface of the substrate;

the supporting film is positioned on one side, away from the substrate, of the first adhesive tape layer and comprises a first opening, so that the base assembly is provided with a first area corresponding to the first opening and a second area surrounding at least part of a boundary line of the first area;

the driving array layer is positioned on the side of the first surface of the substrate; and

a light emitting element layer on a side of the driving array layer facing away from the substrate,

the substrate assembly is provided with an optical adjusting area at least covering the boundary line of the first area, on the surface parallel to the substrate assembly, the preset light property of the optical adjusting area is gradually changed in the direction from the center of the first area to the peripheral radiation direction, and the optical property is at least one of light transmittance or refractive index.

2. The display panel according to claim 1, wherein the optical adjustment region includes a first optical adjustment region coinciding with the first region, and wherein a light transmittance of the first optical adjustment region decreases in a direction radiating from a center to a periphery of the first region.

3. The display panel according to claim 2, wherein in the first optical adjustment region, the light transmittance of the substrate decreases in a direction radiating from the center to the periphery of the first region.

4. The display panel of claim 2, wherein the base assembly further comprises a second tape layer, the second tape layer is disposed on the second surface side of the substrate, the second tape layer covers the first area, and the light transmittance of the second tape layer decreases in a direction radiating from the center of the first area to the periphery.

5. The display panel of claim 1, wherein the first tape layer includes a second opening corresponding to the first opening.

6. The display panel according to claim 1, wherein the optical adjustment region includes a second optical adjustment region that covers a boundary line of the first region and surrounds a periphery of the first region, and a reflectance of the second optical adjustment region decreases in a direction radiating from a center of the first region to a periphery thereof.

7. The display panel according to claim 6, wherein the base member further comprises a light reflection layer on at least one of the first surface and the second surface of the substrate, the light reflection layer is disposed in the second optical adjustment region, and the reflectivity of the light reflection layer decreases in a direction radiating from the center to the periphery of the first region.

8. The display panel of claim 6, wherein in the second optical adjustment area, the reflectivity of the first tape layer decreases in a direction radiating from the center to the periphery of the first area.

9. The display panel of claim 6, wherein any predetermined point on the outer edge line of the second optical adjustment area is connected to the center of the first area as a virtual line segment, the virtual line segment intersects with the boundary line of the first area at a virtual point, and the distance between the predetermined point and the virtual point is greater than or equal to the distance between the virtual point and the center of the first area.

10. The display panel of claim 1, wherein the first adhesive tape layer is a yellow adhesive tape layer.