CN112331087B

CN112331087B - Display panel and display device

Info

Publication number: CN112331087B
Application number: CN202011229664.7A
Authority: CN
Inventors: 卢丽君; 张振铖; 李静
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2022-09-30
Anticipated expiration: 2040-11-06
Also published as: CN112331087A

Abstract

The embodiment of the application provides a display panel and a display device, wherein the display panel comprises a first substrate, the first substrate comprises a conventional display area and a light-transmitting functional area at least partially surrounded by the conventional display area; a plurality of sub-pixels are arranged in the conventional display area; the density of the sub-pixels in the light-transmitting functional area is less than that of the sub-pixels in the conventional display area; wherein, a blue quantum dot layer is arranged in the light-transmitting functional region; along the thickness direction of the display panel, the blue quantum dot layer covers the light-transmitting functional region; the blue quantum dot layer does not overlap the conventional display region in a plane perpendicular to the thickness direction of the display panel. The display panel and the display device provided by the embodiment of the application balance yellow light of the light transmission functional area by arranging the blue quantum dot layer in the light transmission functional area and exciting the blue quantum dot layer by utilizing external light to emit blue light, and further solve the problem of yellow light of the light transmission functional area. The scheme is simple and easy to implement, and the normal display of the conventional display area AA is not influenced.

Description

Display panel and display device

Technical Field

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

Background

With the rapid development of digital display products, in order to increase the screen occupation ratio, an off-screen optical information acquisition device in a display device needs to be arranged in a display area of the display device. In order to enable light required by the off-screen optical signal acquisition device to penetrate through the display area of the display device, the position of the display area where the off-screen optical signal acquisition device is arranged needs to be set to be a light-permeable functional area. The light-permeable functional area needs to be able to transmit outside light outside the display screen. The problem that a light-permeable functional area in the conventional display device is yellow is solved, and the appearance of the display device is influenced.

Disclosure of Invention

In view of the above, embodiments of the present application provide a display panel and a display device to solve the above problems.

In a first aspect, an embodiment of the present application provides a display panel, which includes a first substrate, where the first substrate includes a normal display area and a light-transmissive functional area at least partially surrounded by the normal display area; a plurality of sub-pixels are arranged in the conventional display area; the density of the sub-pixels in the light-transmitting functional area is less than that of the sub-pixels in the conventional display area; wherein, a blue quantum dot layer is arranged in the light-transmitting functional region; along the thickness direction of the display panel, the blue quantum dot layer covers the light-transmitting functional region; in the plane perpendicular to the thickness direction of the display panel, the blue quantum dot layer has no overlap with the conventional display region.

In one implementation manner of the first aspect, a color filter layer and a black matrix layer are provided in the normal display area; in a plane perpendicular to the thickness direction of the display panel, the color filter layer and the black matrix layer are not overlapped with the light-transmitting functional region.

In one implementation of the first aspect, the blue quantum dot layer extends from the light transmissive functional region to the periphery of the light transmissive functional region.

In one implementation manner of the first aspect, in a plane perpendicular to the thickness direction of the display panel, the radius of the blue quantum dot layer is a first radius R1, and the radius of the light-transmitting functional region is a second radius R2; r1 and R2 satisfy: r2 is not less than R1 (R2 + R2 is 0.5%).

In one implementation manner of the first aspect, the first substrate further comprises a light-tight transition region, and the transition region is arranged between the conventional display region and the light-transmissive functional region; the blue quantum dot layer extends from the light-transmitting functional region to the transition region.

In one implementation manner of the first aspect, the display panel further includes a second substrate and a liquid crystal layer, the second substrate is disposed opposite to the first substrate, and the liquid crystal layer is disposed between the first substrate and the second substrate; a plurality of thin film transistors are arranged on one side of the second substrate facing the first substrate; the conventional display area and the light-transmitting function area of the first substrate are internally provided with surface flat layers, and the surface flat layers are arranged on one sides of the color filter layers and the black matrix layers, which face the second substrate.

In one implementation of the first aspect, the blue quantum dot layer is disposed on a side of the surface planarization layer facing away from the first substrate.

In one implementation of the first aspect, the blue quantum dot layer is disposed on a side of the surface planarization layer adjacent to the first substrate.

In one implementation manner of the first aspect, the surface planarization layer includes a first subsurface planarization layer and a second subsurface planarization layer disposed along the thickness direction of the display panel, and the blue quantum dot layer is disposed between the first subsurface planarization layer and the second subsurface planarization layer.

In one implementation of the first aspect, the thickness d of the blue quantum dot layer in the thickness direction of the display panel satisfies: d is more than or equal to 32nm and more than or equal to 28 nm.

In one implementation manner of the first aspect, the density of the sub-pixels in the light-transmitting functional region is 0.

In a second aspect, an embodiment of the present application provides a display device, including the display panel provided in the first aspect and an optical device, where the optical device is disposed at a position of the display device corresponding to the light-transmitting functional region.

In one implementation of the second aspect, the optical device is at least one of an optical fingerprint sensor, an iris recognition sensor, a camera.

The display panel and the display device provided by the embodiment of the application can utilize all lights with the wavelength less than the wavelength of the blue light luminous peak in the external light to excite the blue quantum dot layer to emit the blue light to balance the yellow light of the light transmission functional area by arranging the blue quantum dot layer in the light transmission functional area, so that the problem of yellow light emission of the light transmission functional area is solved, other light sources needing to be controlled or excited except the external light are not needed, the scheme is simple and easy to implement, and the normal display of the conventional display area AA is not influenced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of a display panel according to an embodiment of the present disclosure;

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

FIG. 3 is an enlarged view of a portion of the area DD in FIG. 1;

FIG. 4 is another enlarged partial view of the area DD in FIG. 1;

FIG. 5 is a cross-sectional view taken along line MN in FIG. 1;

fig. 6 is a partial cross-sectional view of a display panel according to an embodiment of the present disclosure;

fig. 7 is a partial cross-sectional view of another display panel provided in the embodiments of the present application;

fig. 8 is a schematic partial cross-sectional view of another display panel according to an embodiment of the present disclosure;

fig. 9 is a schematic partial cross-sectional view of another display panel provided in the embodiment of the present application;

fig. 10 is a schematic partial cross-sectional view of another display panel provided in an embodiment of the present application;

fig. 11 is a schematic partial cross-sectional view of another display panel according to an embodiment of the present application;

fig. 12 is a schematic view of a display device according to an embodiment of the present disclosure.

Detailed Description

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

In the description herein, it is to be understood that the terms "substantially", "approximately", "about", "approximately", "substantially" and the like in the claims and the examples are intended to be inclusive and mean that the term "substantially" may be interpreted as an alternative to an exact value within a reasonable process operating range or tolerance.

It should be understood that although the terms first, second, etc. may be used to describe the substrates, etc. in the embodiments of the present application, these substrates, etc. should not be limited to these terms. These terms are only used to distinguish the substrates from each other. For example, the first substrate may also be referred to as a second substrate, and similarly, the second substrate may also be referred to as a first substrate, without departing from the scope of embodiments of the present application.

The applicant provides a solution to the problems of the prior art through intensive research.

The embodiment of the application provides a display panel and a display device.

Fig. 1 is a schematic view of a display panel according to an embodiment of the present disclosure, fig. 2 is a schematic view of another display panel according to an embodiment of the present disclosure, fig. 3 is a partially enlarged view of a DD region in fig. 1, and fig. 4 is another partially enlarged view of the DD region in fig. 1. It should be noted that the specific structure of the DD region illustrated in fig. 3 and 4 is substantially the same as the specific structure in the vicinity of the functional region in fig. 2.

Referring to fig. 1 and fig. 2, a display panel 001 provided in the embodiment of the present disclosure includes a conventional display area AA and a light-transmissive functional area CC, wherein the conventional display area AA at least partially surrounds the light-transmissive functional area CC. As shown in fig. 1, the light transmissive functional region CC may be completely surrounded by the regular display region AA; as shown in fig. 2, the light-transmissive functional region CC may also be partially surrounded by the regular display region AA.

Referring to fig. 3 and 4, the conventional display area AA includes a plurality of sub-pixels PX capable of emitting light for performing a main light-emitting display. The density of the sub-pixels PX in the light-transmitting functional region CC is less than the density of the sub-pixels PX in the conventional display region AA, and the sub-pixels PX are used for transmitting external light, and can realize other functions besides light-emitting display, such as at least one of photographing, biometric identification, illumination and the like. The external light is light other than light that is controlled by the display panel to perform light-emitting display. As shown in fig. 3, the density of the sub-pixels in the light-transmitting functional region CC is 0, that is, the sub-pixels PX for emitting light are not disposed in the light-transmitting functional region CC, and the light-transmitting functional region CC is only used for implementing the above-mentioned other functions; as shown in fig. 4, the sub-pixel density in the light-transmitting functional region CC is greater than 0 and less than the sub-pixel density in the conventional display region AA, so that the light-transmitting functional region CC can perform these other functions and perform light-emitting display.

Fig. 5 is a cross-sectional view taken along MN in fig. 1. It should be noted that fig. 5 is a schematic cross-sectional view of the vicinity of the light-transmitting functional region, and the structure shown in fig. 5 is also applicable to the structure in the vicinity of the light-transmitting functional region CC in the display panel shown in fig. 2.

As shown in fig. 5, a display panel 001 provided in the embodiment of the present application includes a first substrate 01 and a second substrate 02 disposed along a thickness direction Z thereof, and the first substrate 01 is disposed opposite to the second substrate 02. The first substrate 01 includes a normal display area AA for performing light emitting display and a light transmitting functional area CC for transmitting external light, and the normal display area AA at least partially surrounds the light transmitting functional area CC, corresponding to the display panel 001. In addition, a plurality of sub-pixels PX are disposed in the regular display area AA on the first substrate 01 corresponding to the display panel 001, and the density of the sub-pixels PX in the light-transmitting functional area CC is less than that of the sub-pixels PX in the regular display area AA. It should be noted that the sub-pixel PX is the smallest unit for emitting light in the display panel 001 and can be understood as the smallest region of the display panel 001 where the brightness can be adjusted, and the sub-pixel PX in the first substrate 01 is the same smallest region of the display panel 001 where the brightness can be adjusted.

In the embodiment of the present application, as shown in fig. 5, a blue quantum dot layer 13 is provided in the light-transmitting functional region CC. Along the thickness direction Z of the display panel, the blue quantum dot layer 13 covers the light-transmitting functional region CC; and the blue quantum dot layer 13 does not overlap the conventional display area AA in a plane perpendicular to the thickness direction Z of the display panel. That is, the present embodiment provides the blue quantum dot layer 13 in the region of the first substrate 01 corresponding to the light-transmitting functional region CC, and the blue quantum dot layer 13 is not provided in the region of the first substrate 01 corresponding to the conventional display region AA.

The inventor finds that, because the film layer of the region where the light-transmitting functional region CC is located is different from the film layer of the region where the conventional display region AA is located, when the external light irradiates the light-transmitting functional region CC, the light-transmitting functional region CC is yellowed. By arranging the blue quantum dot layer 13 in the light-transmitting functional region CC, the blue quantum dot layer 13 can be excited by external light to emit blue light, so as to balance yellow light of the light-transmitting functional region CC, and further solve the problem of yellowing of the light-transmitting functional region CC.

In addition, the blue light emitted by the blue quantum dot layer 13 for balancing yellow light in the present application is realized by exciting the blue quantum dot layer 13 by using light with a wavelength smaller than that of the blue light in the external light, and there is no need for a light source which needs to be controlled or excited other than the external light, so that the scheme is simple and easy to implement.

In addition, in the embodiment of the present application, the blue quantum dot layer 13 for balancing the light-transmitting functional region CC is not disposed in the conventional display region AA, so that it can be avoided that the blue quantum dot layer 13 emits blue light to affect the chromaticity of the conventional display region, and further affect the normal display.

Referring to fig. 5, a color filter layer 11 and a black matrix layer 12 are disposed in the conventional display area AA. The color filter layer 11 includes a plurality of color resistors corresponding to the sub-pixels PX one to one, and is configured to filter light emitted from the second substrate 02 direction to realize light emission of different colors; the shielding portion in the black matrix layer 12 is disposed between the adjacent sub-pixels PX to prevent crosstalk of light between the adjacent sub-pixels PX. As shown in fig. 5, the color filter layer 11 may include a blue color filter 111, a red color filter 112 and a green color filter 113, so as to make the corresponding sub-pixels PX emit blue light, red light and green light, respectively.

In one embodiment of the present application, as shown in fig. 3 and 5, the density of the sub-pixels PX in the light-transmitting functional region CC is 0, that is, the sub-pixels PX are not disposed in the light-transmitting functional region CC. In the area corresponding to the light-transmitting functional region CC, the second substrate 02 does not need to be provided with a corresponding circuit structure, and the first substrate 01 does not need to be provided with the color filter layer 11 and the black matrix layer 12, so that the light transmittance of the light-transmitting functional region CC can be enhanced.

In another embodiment of the present application, as shown in fig. 4, the sub-pixels PX are disposed in the light-transmitting functional region CC and the density of the sub-pixels PX in the light-transmitting functional region CC is less than that in the conventional display region AA. The design may also cause the film layer in the area where the light-transmitting functional region CC is located to be different from the film layer in the area where the conventional display region AA is located, for example, the color resistance density in the light-transmitting functional region CC is small, which causes the thickness of some film layers in the light-transmitting functional region CC to be different from the thickness of some film layers in the conventional display region AA.

The following will describe the technical details of the present application without disposing the sub-pixels PX in the light-transmitting functional region CC, and it should be noted that at least some of the technical details set forth below can also be applied to the case where the sub-pixels PX are disposed in the light-transmitting functional region CC and the density of the sub-pixels PX in the light-transmitting functional region CC is less than the density of the sub-pixels PX in the conventional display region AA. It should be understood that, when the sub-pixels PX are disposed in the light-transmitting functional region CC, the blue quantum dot layer 13 may be disposed to avoid the region where the sub-pixels PX are located, so as to avoid affecting the normal display of the sub-pixels PX.

Fig. 6 is a partial cross-sectional view of a display panel provided in an embodiment of the present application, and fig. 7 is a partial cross-sectional view of another display panel provided in an embodiment of the present application.

In one embodiment of the present application, as shown in fig. 6 and 7, the display panel 001 further includes a liquid crystal layer 03 disposed between the first substrate 01 and the second substrate 02. In addition, a plurality of thin film transistors 21, pixel electrodes 22, and a common electrode 23 are disposed on a side of the second substrate 02 facing the first substrate 01, wherein the thin film transistors 21 may control the pixel electrodes 22 to receive a data voltage for light emitting display. An electric field is formed between the pixel electrode 22 and the common electrode 23 to drive liquid crystal molecules in the liquid crystal layer 03 to deflect, so that light emitted from the second substrate 02 can be controlled to be emitted to the first substrate 01.

In addition, a surface planarization layer 14 is disposed in the normal display area AA and the light-transmitting functional area CC of the first substrate 01, and the surface planarization layer 14 is disposed on the side of the color filter layer 11 and the black matrix layer 12 facing the second substrate 02. In addition, the first substrate 01 further includes a first alignment layer 15 thereon, and the first alignment layer 15 is disposed on a side of the surface planarization layer 14 facing away from the first substrate 01. The surface planarization layer 14 serves to planarize the color filter layer 11 and the black matrix layer 12 and to provide a flat surface for the first alignment layer 15.

However, since the color filter layer 11 and the black matrix layer 12 are not disposed in the light-transmitting functional region CC, even if the surface planarization layer 14 covering the light-transmitting functional region CC and the normal display region AA is disposed on the first substrate 01, there is still a film height difference between the light-transmitting functional region CC and the normal display region AA. This results in the thickness of the first alignment layer 15 in the light-transmitting functional region CC being greater than that of the first alignment layer 15 in the conventional display region AA.

Based on the same reason, since the thin film transistor 21 is not disposed in the light-transmitting functional region CC, a film layer height difference also exists in an area of the second substrate 02 corresponding to the light-transmitting functional region CC and the normal display region AA, and thus the thickness of the second alignment layer 24 disposed on the surface of the second substrate 02 in the light-transmitting functional region CC is too thick. As shown in fig. 7, when a portion of the film layer of the second substrate 02 corresponding to the region of the light-transmitting functional region CC is removed in order to improve the light transmittance of the light-transmitting functional region CC, the problem of the second alignment layer 24 having an excessively thick thickness in the light-transmitting functional region CC is more obvious.

The first alignment layer 15 and the second alignment layer 24 are both film layers for performing initial alignment on liquid crystal molecules in the liquid crystal layer 03.

The inventors found that an excessively thick alignment layer is a main cause of yellowing of the light-transmitting functional region, and particularly, an excessively thick first alignment layer 15 plays a major role. Therefore, the liquid crystal display panel comprising the alignment layer can effectively solve the problem that the light-transmitting functional area CC is yellow by adopting the technical scheme of the application.

In one embodiment of the present application, as shown in fig. 5 and 6, the blue quantum dot layer 13 is disposed on the side of the first alignment layer 15 away from the second substrate 02, that is, the blue quantum dot layer 13 is prepared before the first alignment layer 15 is prepared. The blue quantum dot layer 13 can reduce or even fill up the film layer step difference between the light-transmitting functional region CC and the normal display region AA, in the technical solution of the present application, on one hand, the blue quantum dot layer 13 can receive the external light to excite the blue light to balance the yellow light, and on the other hand, the blue quantum dot layer 13 can reduce the thickness of the first alignment layer 15 in the light-transmitting functional region CC to reduce the yellow light.

In addition, the blue quantum dot layer 13 is disposed on the side of the first substrate 01 close to the second substrate 02, that is, the blue quantum dot layer 13 is disposed in the space formed by the substrate in the first substrate 01 and the substrate in the second substrate 02, so as to prevent the blue quantum dot layer 13 from being corroded by external moisture, oxygen, and the like. And when the blue quantum dot layer 13 is disposed between the first alignment layer 15 and the substrate in the first substrate 01, the performance of the blue quantum dot layer 13 can be more effectively protected.

Fig. 8 is a partial cross-sectional view of another display panel provided in the present application, and fig. 9 is a partial cross-sectional view of another display panel provided in the present application.

In one implementation of the present embodiment, as shown in fig. 5-7, the blue quantum dot layer 13 is disposed on the side of the surface planarization layer 14 near the first substrate 01, that is, the blue quantum dot layer 13 is disposed between the surface planarization layer 14 and the substrate in the first substrate 01.

In another implementation of the present embodiment, as shown in fig. 8, the blue quantum dot layer 13 is disposed on the side of the surface planarization layer 14 facing away from the first substrate 01, that is, the blue quantum dot layer 13 is disposed between the surface planarization layer 14 and the first alignment layer 15.

In yet another implementation manner of the present embodiment, as shown in fig. 9, the surface planarization layer 14 includes a first subsurface planarization layer 141 and a second subsurface planarization layer 142 disposed along the thickness direction Z of the display panel 001, and the blue quantum dot layer 13 is disposed between the first subsurface planarization layer 141 and the second subsurface planarization layer 142. That is, the surface planarization layer 14 is prepared in two times, and the blue quantum dot layer 13 is prepared between the two preparations of the surface planarization layer 14. The surface planarization layer 14 is prepared twice, so that a relatively flat bearing surface can be provided for the first alignment layer 15, and the first alignment layer 15 with a uniform thickness can be obtained, thereby reducing the yellow light problem. Meanwhile, the blue quantum dot layer 13 is disposed in the middle of the surface planarization layer 14, so that the blue quantum dot layer 13 is effectively prevented from being damaged in the subsequent process of the display panel 001, and the blue quantum dot layer 13 is effectively prevented from affecting the flatness of the contact surface between the surface planarization layer 14 and the first alignment layer 15.

With reference to fig. 5 to 9, in a plane perpendicular to the thickness direction Z of the display panel 001, the color filter layer 11 and the black matrix layer 12 are not overlapped with the light-transmitting functional region CC, that is, when the sub-pixel PX is not disposed in the light-transmitting functional region CC, the color filter layer 11 and the black matrix layer 12 affecting the light transmittance are not disposed in the light-transmitting functional region CC, so as to effectively increase the light transmittance of the light-transmitting functional region CC.

In one embodiment of the present application, as shown in fig. 5 to 9, the blue quantum dot layer 13 is disposed only on the light-transmitting functional region CC and completely covers the light-transmitting functional region CC. When the blue quantum dot layer 13 is only arranged in the light-transmitting functional region CC, the blue quantum dot layer 13 can be prevented from being excited to emit blue light with a large angle to influence the normal display of the conventional display region AA; when the blue quantum dot layer 13 completely covers the light-transmitting functional region CC, the yellow light problem of the whole light-transmitting functional region CC can be effectively solved.

Fig. 10 is a partial cross-sectional view of another display panel provided in this embodiment of the application, and fig. 11 is a partial cross-sectional view of another display panel provided in this embodiment of the application.

In another embodiment of the present application, as shown in fig. 10 and 11, the area of the blue quantum dot layer 13 is larger than the area of the light-transmitting functional region CC, so that when there is a process error in the manufacturing process of the blue quantum dot layer 13, it can also be ensured that the blue quantum dot layer 13 completely covers the light-transmitting functional region CC. When the area of the blue quantum dot layer 13 is larger than the area of the light-transmitting functional region CC, the blue quantum dot layer 13 extends from the light-transmitting functional region CC to the periphery of the light-transmitting functional region CC.

As shown in fig. 10 and 11, in a plane perpendicular to the thickness direction Z of the display panel 001, the radius of the blue quantum dot layer 13 is the first radius R1, and the radius of the light-transmissive functional region CC is the second radius R2, then R1 and R2 satisfy: r2 is not less than R1 (R2 + R2 0.5%). When the radius of the blue quantum dot layer 13 is set to be within the range, the problem that the blue quantum dot layer 13 cannot cover the light-transmitting functional region CC due to the existing process error can be effectively avoided, and the normal display of the conventional display region AA cannot be influenced.

As shown in fig. 10 and 11, the display panel 001 further includes a transition region GG, and the transition region GG is disposed between the regular display region AA and the light-transmitting functional region CC and surrounds the light-transmitting functional region CC. The transition area GG is a non-luminous and non-light-tight area, and a light shielding structure, such as a black glue and a black matrix layer, is disposed in the area, wherein when the light shielding structure disposed in the transition area GG is a black matrix layer, the black matrix layer 12 disposed in the conventional display area AA extends to the transition area GG. Transition district GG mainly used sets up the wire winding etc. if the data line that lies in the relative both sides of printing opacity functional area CC on second base plate 02 passes through the wire winding and connects and this wire winding can set up in transition district GG, and/or the scanning line that lies in the relative both sides of printing opacity functional area CC on second base plate 02 passes through the wire winding and connects and this wire winding can set up in transition district GG.

Correspondingly, the first substrate 01 includes a transition region GG disposed between the normal display region AA and the light-transmissive functional region CC and being opaque to light, and the blue quantum dot layer 13 extends from the light-transmissive functional region CC to the transition region GG and does not extend to the normal display region AA, for example, the blue quantum dot layer 13 may extend to the transition region GG and cover the middle region of the transition region GG.

In one implementation of the present embodiment, as shown in fig. 10, one side or both sides of the blue quantum dot layer 13 extend to the periphery of the light-transmitting functional region CC.

In another implementation of the present embodiment, as shown in fig. 11, the blue quantum dot layer 13 extends on each side to the periphery of the light-transmitting functional region CC.

Along the thickness direction Z of the display panel 001, the thickness d of the blue quantum dot layer 13 satisfies: d is more than or equal to 32nm and more than or equal to 28 nm. The inventor finds that the existing yellow light of the light-transmitting functional region CC is within 0.01 of the yellow of a white dot, and when the thickness of the blue quantum dot layer 13 is [28nm, 32nm ], the best white light compensation effect can be obtained.

As shown in fig. 12, the display device includes the display panel 001 provided in any one of the above embodiments. The display device provided by the embodiment of the application can be a mobile phone, and in addition, the display device provided by the embodiment of the application can also be a computer, a television and other display devices.

As shown in fig. 12, the display device provided in the embodiment of the present application further includes an optical device 002, and the optical device 002 is disposed at a position of the display device corresponding to the light-transmitting functional region CC of the display panel 001. That is, the optical device 002 is disposed below the light transmitting functional region CC of the display panel 001 in the thickness direction Z of the display panel 001. The optical device 002 can emit light to the light emitting surface side of the display panel 001 through the light transmitting functional region CC, or can receive light from the light emitting surface side of the display panel 001 through the light transmitting functional region CC. Wherein, the optical device 002 is at least one of an optical fingerprint sensor, an iris recognition sensor, a camera and a flashlight.

When the blue quantum dot layer 13 is disposed in the light-transmitting functional region CC, the influence of the blue quantum dot layer 13 on the light emitted and/or received by the optical device 002 can be obtained through software calculation, and then the relevant data of the optical device 002 can be corrected, so as to ensure the normal function of the optical device 002. For example, when the optical device 002 is a camera, the influence of the blue quantum dot layer 13 on the image acquired by the camera can be acquired in advance through software, and the related data of the camera can be corrected in the subsequent work of the camera, so as to ensure the normal function of the camera in the light-transmitting functional region CC.

The display device provided by the embodiment of the application can balance yellow light of the light-transmitting functional region CC by arranging the blue quantum dot layer 13 in the light-transmitting functional region CC and exciting the blue quantum dot layer 13 by using external light to emit blue light, thereby solving the problem of yellowing of the light-transmitting functional region CC. The scheme is simple and feasible and does not influence the normal display of the conventional display area AA.

The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A display panel, comprising: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are oppositely arranged, and the liquid crystal layer is positioned between the first substrate and the second substrate; the first substrate includes:

a regular display area, wherein a plurality of sub-pixels are arranged in the regular display area;

a light transmissive functional region, the regular display region at least partially surrounding the light transmissive functional region; the density of the sub-pixels in the light-transmitting functional area is less than that of the sub-pixels in the conventional display area;

wherein, a blue quantum dot layer is arranged in the light-transmitting functional region; the blue quantum dot layer covers the light-transmitting functional region along the thickness direction of the display panel; the blue quantum dot layer has no overlap with the normal display region in a plane perpendicular to a thickness direction of the display panel.

2. The display panel according to claim 1, wherein a color filter layer and a black matrix layer are provided in the normal display region; in a plane perpendicular to the thickness direction of the display panel, the color filter layer and the black matrix layer are not overlapped with the light-transmitting functional area.

3. The display panel according to claim 1, wherein the blue quantum dot layer extends from the light-transmissive functional region to a periphery of the light-transmissive functional region.

4. The display panel of claim 3, wherein the radius of the blue quantum dot layer is a first radius R1, and the radius of the light-transmissive functional region is a second radius R2 in a plane perpendicular to the thickness direction of the display panel; r1 and R2 satisfy: r2 is not less than R1 (R2 + R2 is 0.5%).

5. The display panel according to claim 3, wherein the first substrate further comprises a light-opaque transition region disposed between the normal display region and the light-transmissive functional region; the blue quantum dot layer extends from the light-transmitting functional region to the transition region.

6. The display panel according to claim 2, wherein a plurality of thin film transistors are provided on a side of the second substrate facing the first substrate;

and surface flat layers are arranged in the conventional display area and the light-transmitting function area of the first substrate and are arranged on one sides, facing the second substrate, of the color filter layer and the black matrix layer.

7. The display panel of claim 6 wherein the blue quantum dot layer is disposed on a side of the surface planar layer facing away from the first substrate.

8. The display panel of claim 6 wherein the blue quantum dot layer is disposed on a side of the surface planar layer adjacent to the first substrate.

9. The display panel of claim 6, wherein the surface planarization layer comprises a first subsurface planarization layer and a second subsurface planarization layer disposed along a thickness direction of the display panel, and wherein the blue quantum dot layer is disposed between the first subsurface planarization layer and the second subsurface planarization layer.

10. The display panel according to claim 1, wherein a thickness d of the blue quantum dot layer in a thickness direction of the display panel satisfies: d is more than or equal to 32nm and more than or equal to 28 nm.

11. The display panel according to claim 1, wherein the density of the sub-pixels in the light-transmitting functional region is 0.

12. A display device, comprising the display panel according to any one of claims 1 to 11 and an optical device, wherein the optical device is disposed at a position of the display device corresponding to the light-transmitting functional region.

13. The display device of claim 12, wherein the optical device is at least one of an optical fingerprint sensor, an iris recognition sensor, and a camera.