CN114005864A

CN114005864A - Display panel and display device

Info

Publication number: CN114005864A
Application number: CN202111343100.0A
Authority: CN
Inventors: 邓贤柱; 张萌; 杜凌霄; 孙增标; 黄梦; 孙小东
Original assignee: Hefei Visionox Technology Co Ltd
Current assignee: Hefei Visionox Technology Co Ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-02-01

Abstract

The application provides a display panel and a display device, relates to the technical field of display devices, and is used for solving the technical problem that the overall transmittance of the display panel is low. The display panel comprises a light-emitting layer and a composite filter layer, wherein the composite filter layer is positioned on the light-emitting side of the light-emitting layer; the light emitting layer includes a light emitting region and a non-light emitting region; the composite filter layer comprises a first filter layer and a second filter layer, the first filter layer comprises a plurality of filter parts, a light shielding part is formed between every two adjacent filter parts, the orthographic projection of the filter parts on the light-emitting layer covers the light-emitting region, and the orthographic projection of the light shielding part on the light-emitting layer covers the non-light-emitting region; the shading part is provided with a light-transmitting part; the orthographic projection of the second filter layer on the light emitting layer covers the orthographic projection of the light transmission part on the light emitting layer, and the display panel and the display device provided by the application can meet the use requirement of an optical device under a screen, and the display effect of the display panel and the display device is improved.

Description

Display panel and display device

Technical Field

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

Background

Organic Light Emitting Diodes (OLEDs) are increasingly used in high performance display applications because of their characteristics of self-luminescence, fast response, wide viewing angle, and being capable of being fabricated on flexible substrates. In the OLED display panel, a Color filter on Encapsulation layer (COE) technology can reduce power consumption and thickness of the display panel, and is widely used.

The COE technology includes a COE film layer covering a light emitting layer. The COE film layers include a Color Filter (CF) film layer and a Black Matrix (BM) film layer. The CF film layers are arranged in an array mode, the CF film layers correspond to the light emitting areas of the light emitting layers, the BM film layers are located between the adjacent CF film layers, and the BM film layers correspond to the non-light emitting areas of the light emitting layers. The transmittance of the CF film layer is designed, so that the reflectivity of ambient light in the light emitting area is reduced; the film thickness and the optical density value of the BM film layer are controlled to reduce the reflectivity of the ambient light in the non-luminous area, so that the reflectivity of the ambient light in the luminous layer is reduced by utilizing the COE film layer as a whole, and the effect of improving the contrast of the display panel is achieved.

However, in the above technical solution, the transmittance of the external light in the display panel is low, which affects the use effect of the optical device under the screen below the display panel.

Disclosure of Invention

In view of the foregoing problems, embodiments of the present application provide a display panel and a display device, which can meet the use requirement of an optical device under a screen, and improve the display effect of the display panel and the display device.

In order to achieve the above object, the embodiments of the present application provide the following technical solutions:

a first aspect of an embodiment of the present application provides a display panel, the display panel includes a light emitting layer and a composite filter layer, the composite filter layer is located on a light emitting side of the light emitting layer.

The light emitting layer comprises a plurality of light emitting areas, and a non-light emitting area is formed between every two adjacent light emitting areas.

The composite filter layer comprises a first filter layer and a second filter layer, the first filter layer comprises a plurality of filter parts, a light shielding part is formed between every two adjacent filter parts, the orthographic projection of the filter parts on the light emitting layer covers the light emitting region, and the orthographic projection of the light shielding part on the light emitting layer covers the non-light emitting region.

The shading part is provided with a light transmission part.

And the orthographic projection of the second filter layer on the light-emitting layer covers the orthographic projection of the light-transmitting part on the light-emitting layer.

The display device that this application embodiment provided, including luminescent layer and compound filter layer, the luminescent layer includes light-emitting area and non-light emitting area, and the compound filter layer includes first filter layer and second filter layer, and first filter layer includes light filtering part and light shielding part, and the light shielding part is provided with the printing opacity portion, and the orthographic projection of second filter layer on first filter layer covers printing opacity portion. Therefore, the light-transmitting part and the second filter layer are arranged, the defect of low transmittance of the light-shielding part is overcome, the transmittance of light projected to the optical device under the screen through the light-shielding part is improved, integration of the display panel and the optical device under the screen is facilitated, and the use requirement of the incident light quantity of the optical device under the screen is met. Due to the fact that the second filter layer is arranged, external light enters the second filter layer through secondary incidence after primary incidence and screen internal reflection, and the transmittance of the external light can be reduced under the condition that only the light transmission part is arranged relatively, so that the reflectivity of the display panel is effectively reduced, the diffraction and reflection problems on the display panel are reduced, and the display effect of the display panel is improved.

In one implementable embodiment, the light-transmitting portion includes a light-transmitting hole that penetrates the light-shielding portion in a thickness direction of the light-shielding portion.

Therefore, the light transmission space is formed by the light transmission holes, so that the processing is convenient and the realization is easy.

In one implementation, the second filter layer fills at least a portion of the light-transmitting hole along a depth direction of the light-transmitting hole.

In a possible embodiment, the second filter layer fills the entire light-transmitting hole, or the second filter layer fills a part of the light-transmitting hole in a depth direction of the light-transmitting hole.

Therefore, the second filter layer and the first filter layer are arranged in the same layer, and the thickness of the display panel is reduced under the condition that the use requirement of the optical device under the screen is met.

In an embodiment, a light absorbing member is disposed in the light-transmitting hole, and at least a partial edge of an orthographic projection of the light absorbing member on the light-emitting layer is spaced from an edge of the orthographic projection of the light-transmitting hole on the light-emitting layer.

Therefore, the light absorbing piece is used for absorbing part of diffraction light at the light transmitting holes, and the diffraction problem possibly caused by the arrangement of the light transmitting holes can be reduced.

In one possible embodiment, the second optical filter layer is arranged on top of the first optical filter layer.

In a possible embodiment, the first filter layer is located on a side of the second filter layer close to the light-emitting layer.

Like this, the range upon range of setting of second filter layer and first filter layer can increase the area that the second filter layer covers first filter layer, increases the filtering effect of second filter layer, and structural stability is good, improves optical device's under the screen result of use, optimizes display panel's display effect simultaneously.

In one implementation, an orthographic projection of the second filter layer on the first filter layer covers the light shielding portion.

In one possible embodiment, the second filter layer includes a color filter layer.

Therefore, the light filtering effect on the adjacent position of the light transmitting part and the light shielding part can be ensured to be higher, the reflectivity and the diffraction of the display panel are further reduced, and the display effect of the display panel is optimized. The second filter layer is a color filter film layer, only the light rays in the specific wave band identified by the optical device under the screen are allowed to penetrate through, the using effect of the optical device under the screen is improved, meanwhile, the light rays in the other wave bands are prevented from entering the display panel, and the problems of reflection and diffraction of the display panel are solved.

In a possible embodiment, the orthographic projection of the second optical layer on the first optical layer covers the entire first optical layer.

In a possible embodiment, the second filter layer comprises an insulating cover layer.

Thus, the second filter layer covers the whole first filter layer, and manufacturing and processing are facilitated. The second filter layer is an insulating covering layer, allows the spectrum of the full wave band to penetrate through, and avoids the problem of hue of reflected light of the display panel.

In one implementation, the composite filter layer further includes a third filter layer located on a side of the second filter layer away from the light-emitting layer, and an orthographic projection of the third filter layer on the light-emitting layer covers an orthographic projection of the second filter layer on the light-emitting layer.

In one possible embodiment, the third optical filter layer includes an anti-reflection antireflection film layer and/or an anti-fingerprint film layer.

Therefore, the third filter layer can relieve the hue problem of reflected light caused by the addition of the second filter layer.

In a possible embodiment, the orthographic projection of the third optical filter on the light-emitting layer covers the entire light-emitting layer.

Therefore, the whole layer of the third filter layer is arranged, the problem of the hue of the reflected light of the display panel caused by the addition of the second filter layer can be relieved from the whole display panel, and the processing and the manufacturing are convenient.

In one possible implementation, an encapsulation layer and an adhesive layer are disposed between the second filter layer and the third filter layer, and the adhesive layer is located between the encapsulation layer and the second filter layer.

Therefore, the second filter layer is packaged through the packaging layer and the bonding layer, the third filter layer covers the other side of the packaging layer, the first filter layer and the second filter layer are protected, and the display panel is suitable for structural requirements of the display panel.

A second aspect of the embodiments of the present application provides a display apparatus, including an off-screen optical device and the display panel described above, wherein the off-screen optical device is located on a backlight side of a light emitting layer of the display panel.

The display device provided by the embodiment of the application comprises a display panel and an optical device under a screen. The display device comprises a light-emitting layer and a composite filter layer, wherein the light-emitting layer comprises a light-emitting area and a non-light-emitting area, the composite filter layer comprises a first filter layer and a second filter layer, the first filter layer comprises a light filtering part and a light shielding part, the light shielding part is provided with a light-transmitting part, the light-transmitting part corresponds to an optical device under a screen, and the orthographic projection of the second filter layer on the first filter layer covers the light-transmitting part. Therefore, the light-transmitting part and the second filter layer are arranged, the defect of low transmittance of the light-shielding part is overcome, the transmittance of light projected to the optical device under the screen through the light-shielding part is improved, integration of the display panel and the optical device under the screen is facilitated, and the use requirement of the incident light quantity of the optical device under the screen is met. Due to the fact that the second filter layer is arranged, external light enters the second filter layer through secondary incidence after primary incidence and screen internal reflection, and the transmittance of the external light can be reduced under the condition that only the light transmission part is arranged relatively, so that the reflectivity of the display panel is effectively reduced, the diffraction and reflection problems on the display panel are reduced, and the display effect of the display panel is improved. The display device has the same beneficial effects, and the using effect of the display device is improved.

The construction and other objects and advantages of the present application will be more apparent from the description of the preferred embodiments taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

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

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

fig. 4 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;

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

fig. 11 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;

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

fig. 13 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;

fig. 14 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;

fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present application.

Description of reference numerals:

10-a display device;

20-a display panel;

30-underscreen optics;

40-the object to be tested;

200-a substrate;

210-driving the array layer;

220-a light emitting layer; 221-a light emitting region; 222-a non-light emitting region;

230-thin film encapsulation layer;

240-touch module layer;

250-a composite filter layer; 251-a first filter layer; 2511-a light filter part; 2512-light shielding part; 25121-a light-transmitting part; 25122-a light absorbing member; 252-a second filter layer; 253-a third filter layer;

260-an adhesive layer;

270-an encapsulation layer;

310-one incident external light; 311-one pass external light; 312-once reflecting external light; 320-secondary reflection of external light; 321-secondary transmission of external light; 322-three times reflecting external light; 330-light emitted by the display panel.

Detailed Description

In the related art, the CF film of the COE film has a high transmittance for red light, green light, and blue light, and absorbs light of other bands. The light wave band of the emergent light of the luminous zone of the luminous layer corresponds to the wave band of the transmitted light of the CF film layer, so the CF film layer has small influence on the intensity of the emergent light of the luminous zone. However, the ambient light is generally visible light including the entire light wavelength band or light having a broad wavelength band spectrum, and most of the incident ambient light and the ambient light reflected by the light emitting region of the light emitting layer can be filtered by the CF layer, so that the CF layer reduces the reflectivity of the ambient light on the light emitting region of the light emitting layer. The BM film layer has strong absorption effect on light, and most of incident ambient light and ambient light reflected by a non-light emitting region of the light emitting layer are absorbed by the BM film layer, so that the reflectivity of the ambient light in the non-light emitting region is reduced by the BM film layer. The COE film layer reduces the reflectivity of ambient light on the luminous layer as a whole, and achieves the effect of improving the contrast of the display panel. However, since all the spaces of the non-light-emitting areas of the light-emitting layer are blocked by the BM film layer, the overall transmittance of the display panel is reduced, and therefore, the off-screen optical devices including the off-screen optical fingerprint identifier, the off-screen camera, and the like cannot receive sufficient light, the use effect of the off-screen optical devices is affected, and the effective integration of the off-screen optical devices and the display panel based on the COE technology is also limited. The related art generally improves the transmittance by opening a hole in the BM film layer to ensure the incident light amount of the optical device under the screen. However, such an arrangement may affect the optical characteristics of the display panel, causing problems such as a high reflectance, a low degree of blackness, and a high degree of diffraction.

In view of the foregoing technical problem, an embodiment of the present application provides a display panel and a display device, where the display panel includes a light emitting layer and a composite filter layer, the light emitting layer includes a light emitting region and a non-light emitting region, the composite filter layer includes a first filter layer and a second filter layer, the first filter layer includes a light filtering portion and a light shielding portion, the light shielding portion is provided with a light transmitting portion, and an orthographic projection of the second filter layer on the first filter layer covers the light transmitting portion. Therefore, the light-transmitting part and the second filter layer are arranged, the defect of low transmittance of the light-shielding part is overcome, the transmittance of light projected to the optical device under the screen through the light-shielding part is improved, integration of the display panel and the optical device under the screen is facilitated, and the use requirement of the incident light quantity of the optical device under the screen is met. Due to the fact that the second filter layer is arranged, external light enters the second filter layer through secondary incidence after primary incidence and screen internal reflection, and the transmittance of the external light can be reduced under the condition that only the light transmission part is arranged relatively, so that the reflectivity of the display panel is effectively reduced, the diffraction and reflection problems on the display panel are reduced, and the using effect of the display panel is improved. The display device comprises the display panel and the optical device under the screen, has the same beneficial effects, and improves the using effect of the display device.

In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. 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.

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure; FIG. 2 is an enlarged view of a portion of FIG. 1 at A; FIG. 3 is an enlarged view of a portion of FIG. 1 at B; fig. 4 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure; fig. 5 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure; fig. 6 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure; fig. 7 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure; fig. 8 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure; fig. 9 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure; fig. 10 is a schematic structural diagram of a display panel according to an embodiment of the present application; fig. 11 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure; fig. 12 is a schematic structural diagram of a display panel according to an embodiment of the present application; fig. 13 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure; fig. 14 is a schematic structural diagram of another display panel according to an embodiment of the present application.

Referring to fig. 1-14, in a first aspect, embodiments of the present application provide a display panel 20, where the display panel 20 is disposed on an off-screen optical device 30 and used in cooperation with the off-screen optical device 30. The display panel includes a light emitting layer 220 and a composite filter layer 250, the composite filter layer 250 is located on a light emitting side of the light emitting layer 220, and the underscreen optical device 30 is located on a backlight side of the light emitting layer 220.

The light emitting layer 220 includes a plurality of light emitting regions 221, and a non-light emitting region 222 is formed between two adjacent light emitting regions 221.

The composite filter layer 250 includes a first filter layer 251 and a second filter layer 252, the first filter layer 251 includes a plurality of filter portions 2511, a light shielding portion 2512 is formed between two adjacent filter portions 2511, an orthogonal projection of the filter portion 2511 on the light-emitting layer 220 covers the light-emitting region 221, and an orthogonal projection of the light shielding portion 2512 on the light-emitting layer 220 covers the non-light-emitting region 222. It is understood that coverage in this application may refer to partial coverage or full coverage.

The light shielding portion 2512 is provided with a light transmitting portion 25121, and the light transmitting portion 25121 corresponds to the underscreen optical device 30.

An orthogonal projection of the second filter layer 252 on the light-emitting layer 220 covers an orthogonal projection of the light-transmitting portion 25121 on the light-emitting layer 220. In some embodiments of the present application, an orthogonal projection of the light-transmitting portion 25121 on the light-emitting layer 220 is wholly or partially located within an orthogonal projection of the second filter layer 252 on the first filter layer 251. The following embodiments describe a structure in which all of the light-transmitting portions 25121 are located in an orthogonal projection of the second filter layer 252 on the first filter layer 251.

As shown in fig. 1-13, the backlight side of the display panel 20 is provided with underscreen optics 30. The display Panel 20 includes a substrate 200, a driving array layer 210, a light emitting layer 220, a Thin Film Encapsulation layer 230 (TFE), a Touch module layer 240(Touch Panel, TP), a first filter layer 251, a second filter layer 252, an adhesive layer 260, an Encapsulation layer 270, and a third filter layer 253.

The driving array layer 210 is located on a side of the substrate 200 away from the under-screen optical device 30, and the driving array layer 210 includes a plurality of driving transistors (Thin-Film transistors, TFT for short) arranged in an array.

The light emitting layer 220 includes a non-light emitting region 222 and a plurality of light emitting regions 221, the number of the light emitting regions 221 and the number of the driving transistors may be equal, and the plurality of light emitting regions 221 and the plurality of driving transistors are disposed in one-to-one correspondence. The non-light emitting regions 222 are located between adjacent light emitting regions 221. Independent non-light-emitting regions 222 may be disposed between adjacent light-emitting regions 221, the plurality of non-light-emitting regions 222 being arranged in an array; alternatively, the non-light-emitting regions 222 between adjacent light-emitting regions 221 may be connected to each other to form a unitary structure. The embodiments of the present application will be mainly explained with the latter.

Specifically, a light emitting stack layer is generally disposed in the light emitting region 221, and the light emitting stack layer may include an anode layer, a hole transport layer, a hole injection layer, an organic light emitting layer, an electron injection layer, an electron transport layer, and a cathode layer, which are sequentially stacked. The driving transistors in the driving array layer 210 are connected to the anode layer or the cathode layer to provide electrical signals for the light emitting stack layer. When an electrical signal is written into the light emitting stack layer, holes of the anode layer are transmitted to the organic light emitting layer through the hole transport layer and the hole injection layer, electrons of the cathode layer are transmitted to the organic light emitting layer through the electron transport layer and the electron injection layer, and the electrons and the holes are combined in the organic light emitting layer to generate photoelectrons, so that the light emitting layer 220 emits light. The non-light-emitting region 222 is generally provided with a light-emitting limiting layer, and the light-emitting limiting layer is generally made of a black light-absorbing resin material and is used for blocking light of two adjacent light-emitting regions 221 from mixing. In some embodiments, the cathode layer and the anode layer within the light emitting region 221 may also extend to the non-light emitting region 222.

The thin film encapsulation layer 230 is located on a side of the light emitting layer 220 away from the under-screen optical device 30, and the thin film encapsulation layer 230 may function to encapsulate the light emitting layer 220, the driving array layer 210, and the substrate 200. The thin film encapsulation layer 230 includes an organic layer and an inorganic layer, which are stacked, and can prevent water vapor and oxygen outside the thin film encapsulation layer 230 from penetrating into the light emitting layer 220 or the driving array layer 210, thereby ensuring structural stability and service life of the light emitting layer 220 or the driving array layer 210.

The touch module layer 240 is located on a side of the thin film encapsulation layer 230 away from the optical device 30 under the screen, and a plurality of touch elements are arranged in an array in the touch module layer 240 to realize a touch function of the display panel.

The first filter layer 251 includes a filter portion 2511 and a light shielding portion 2512. The plurality of light-shielding portions 2511 are arranged in an array corresponding to the structure of the light-emitting layer 220, and the light-shielding portions 2512 are located between adjacent light-shielding portions 2511 and connected to each other to form an integrated structure.

Specifically, the filter 2511 may include a CF film layer, and the light shield 2512 may include a BM film layer. The CF film layer has higher transmittance for red light, green light and blue light, has larger absorption for light rays in other wave bands, and is used for improving the purity of the luminous color of the display panel. The BM film layer has a strong absorption effect on light, is used for reducing light mixing between adjacent light emitting areas and simultaneously absorbs part of reflected light of external light on the light emitting areas.

As shown with reference to fig. 2, the light-transmitting portion 25121 in the present embodiment may include a light-transmitting hole that penetrates the light-shielding portion 2512 in the thickness direction of the light-shielding portion 2512. The position, size and shape of the light hole are set according to the optical device 30 under the screen, which is not limited in this embodiment. For example, the position of the light transmission hole may be located at the center of the light shielding portion 2512 or at the edge of the light shielding portion 2512. The shape of the light-transmitting hole may include a circle, a square, a polygon, or the like. In this way, a light transmitting space is formed in the light shielding portion 2512 by the light transmitting hole, which has the effect of facilitating processing and easy implementation.

In one possible embodiment, referring to fig. 14, the light-absorbing member 25122 is disposed in the light-transmitting hole, and at least a part of the edge of the orthographic projection of the light-absorbing member 25122 on the light-emitting layer 220 is spaced from the edge of the orthographic projection of the light-transmitting hole on the light-emitting layer 220.

Among other things, the material of the light absorbing member 25122 may include a black light absorbing resin material. The light absorbing member 25122 may be formed in a cubic particle shape, and the cross-sectional shape thereof in the extending direction of the light emitting layer may be a square shape having a side of 1 to 5 μm. Of course, in practical use, the light absorbing member 25122 may be cylindrical, conical, etc., and the structure is not limited in this embodiment. The light absorbing member 25122 may be disposed at an inner wall of the light transmission hole. Of course, in practical use, the light absorbing member 25122 can also be disposed at the center of the light hole, and the specific position thereof is not limited in this embodiment. It should be noted that the light absorbing members 25122 in the plurality of light transmitting holes are not uniformly arranged.

Therefore, the light absorbing piece 25122 is used for absorbing the diffraction light at the light transmitting hole, so that the diffraction problem possibly caused by the arrangement of the light transmitting hole can be reduced, the influence of the diffraction light on the optical device 30 under the screen is improved, and the display effect of the display panel is optimized.

It is understood that the embodiment of the present application is only illustrated in fig. 14, and the second filter layer 252 fills the light-transmitting hole and covers a side of the first filter layer 251 away from the light-emitting layer 220. While fig. 14 shows only one arrangement of the second filter layer 252, the above-described embodiment in which the light absorbing member 25122 is provided in the light-transmitting hole is similarly applicable to other arrangements of the second filter layer, and all of them can reduce diffraction at the light-transmitting hole.

Based on the light-transmitting portion having the above structure, in this embodiment, the second filter layer 252 may include the following three setting modes:

in a first implementation manner of disposing the second filter layer 252, the second filter layer 252 fills at least a portion of the light-transmitting hole along a depth direction of the light-transmitting hole.

Referring to fig. 1, the second filter layer 252 may fill the entire light transmission hole. Alternatively, referring to fig. 4, the second filter layer 252 fills a part of the light transmission holes along the depth direction of the light transmission holes, and the rest of the light transmission holes are filled with light transmission members for supporting the light transmission holes in consideration of the supporting effect of the light transmission holes.

It is understood that the portion of the light hole filled by second filter layer 252 may be the side of the light hole close to the off-screen optical device 30 or the side far from the off-screen optical device 30.

The second filter layer 252 has a filtering effect on external light, and the second filter layer 252 may include an insulating cover layer (OC), which has a filtering effect on light of a full wavelength band. The material of the black insulating cover layer may include an organic material, and the forming manner may include a coating process. Illustratively, the black insulating cover layer optical transmittance range may satisfy: the optical transmittance is more than or equal to 60 percent and less than or equal to 90 percent.

Alternatively, the second filter layer 252 may include a color filter layer that only allows light of a specific wavelength band to pass through and can filter and absorb light of another specific wavelength band. The material of the color filter film layer may include an organic material, and the forming manner may include coating forming or printing forming. Illustratively, the light bands recognizable by the underscreen optics 30 are green and red, and the color filter layer may be made of a material selected to allow only light in the green and red bands to pass therethrough, thereby absorbing and filtering light in the blue band. As shown in fig. 1-3, the solid line arrows indicate red band light, the dashed line arrows indicate green band light, and the dotted line arrows indicate blue band light. It is known that when external light passes through the second filter layer 252, light in red and green wavelength bands can pass through the second filter layer 252, and light in blue wavelength band can be absorbed.

Thus, as shown in fig. 2, the light ray 330 emitted from the display panel propagates to the object 40 to be measured, and the light ray 330 emitted from the display panel is reflected by the object 40 to form a primary incident external light ray 310 to enter the display panel 20.

As shown in the left and right optical paths in fig. 3, the primary incident external light 310 first passes through the second filter layer 252 and the light-transmitting portion 25121. In the first filtering process, a part of the primary incident external light 310 is reflected by the second filter layer 252, and the reflected light exits to the outside of the display panel 20 as the primary reflected external light 312. A portion of the once incident external light 310 is absorbed by the second filter layer 252. A portion of the primary incident external light 310 passes through the second filter layer 252 and propagates to the sub-screen optical device 30 as a primary external light 311.

A part of the light rays 311 passing through the outside at a time are incident on the optical device 30 under the screen, and the incident light rays serve as incident light rays of the optical device 30 under the screen, so that the use requirement of the incident light quantity of the optical device 30 under the screen is met. Another part of the first-pass external light 311 is reflected by the internal structure layer of the display panel 20 or the sub-screen optical device 30, forming a second-pass external light 320.

The secondary reflected external light 320 passes through the second filter layer 252 and the light-transmitting portion 25121 for the second time and returns to the outside of the display panel 20. In the second filtering process, a part of the second reflected external light 320 is reflected by the second filter layer 252, and the reflected external light forms a third reflected external light 322 and is reflected back to the inside of the display panel 20; a part of the secondary reflected external light 320 is absorbed by the second filter layer 252; a part of the secondary reflected external light 320 passes through the second filter layer 252 to form a secondary transmitted external light 321 which exits to the outside of the display panel 20.

In the display panel 20 provided in the embodiment of the application, the external light passes through the second filter layer 252 and the light-transmitting portion 25121 twice, and in the above twice filtering process, the second filter layer 252 can filter light in a partial waveband of the external light, and the light in the waveband that can be sensed by the optical device 30 under the screen can be transmitted through the second filter layer 252, so that the use requirement of the light entering amount of the optical device 30 under the screen can be ensured; and the intensity of light reflected from the inside to the outside of the display panel 20 can be reduced, the problems of excessively high reflectivity and diffraction can be reduced, and the display effect of the display panel 20 can be optimized. Further, when the second filter layer 252 includes a color filter layer, it only allows light of a specific wavelength band to pass through, and the light of the specific wavelength band may be light of a wavelength band that can be sensed by the off-screen optical device, so that the transmittance of the light of the wavelength band that can be sensed can be increased, and the using effect of the off-screen optical device 30 is improved.

Moreover, in the embodiment, the second filter layer 252 is located in the light-transmitting hole, and the second filter layer 252 and the first filter layer 251 are arranged on the same layer, which helps to reduce the overall thickness of the display panel 20.

In an embodiment of disposing the second filter layer 252, which can be implemented in the second manner, as shown in fig. 5 to 7, the second filter layer 252 may be disposed to be stacked on the first filter layer 251.

In this embodiment, the first filter layer 251 may be located on a side of the second filter layer 252 close to the light-emitting layer 220. Alternatively, in other realizable embodiments, the second filter layer 252 may also be located on the side of the first filter layer 251 that is close to the light-emitting layer 220. In the embodiment of the present application, the first filter layer 251 is mainly located on a side of the second filter layer 252 close to the light-emitting layer 220.

In the above two stacked arrangements of the second filter layer 252 and the first filter layer 251, the path of the external light inside the display panel 20 and the interaction with the second filter layer 252 are similar to those of the above first achievable second filter layer arrangement embodiment, and have the same beneficial effects, which are not described in detail herein.

In addition, in the embodiment, the second filter layer 252 is stacked with the first filter layer 251, and the second filter layer 252 is not limited to only cover the light-transmitting portion 25121 of the first filter layer 251, so that the area of the second filter layer 252 covering the first filter layer 251 can be increased, the filtering effect of the second filter layer 252 can be increased, the structural stability is good, the use effect of the off-screen optical device 30 is improved, and the display effect of the display panel 20 is optimized.

In the stacking arrangement of the second filter layer 252 and the first filter layer 251, the arrangement manner may include the following three types:

in a first possible implementation, referring to fig. 5, an orthogonal projection of the second filter layer 252 on the first filter layer 251 covers the light-transmitting portion 25121. The second filter layer 252 is located at an end of the light hole away from the light-emitting layer 220, and the second filter layer 252 blocks the light hole.

In this embodiment, the light-transmitting portion 25121 covering the first filter layer 251 is laminated based on the second filter layer 252, and the second filter layer 252 is located outside the light-transmitting portion 25121 of the first filter layer 251, which can receive more external light. More external light enters the second filter layer 252, so that the filter effect of the second filter layer 252 on the external light entering the second filter layer 252 can be ensured, the optical device 30 under the screen can receive light in an induced waveband with enough light entering amount, the reflected light of the display panel can be reduced, the diffraction problem on the display panel can be relieved, and the display effect of the display panel 20 can be optimized.

In a second possible implementation, as shown in fig. 6, an orthogonal projection of the second filter layer 252 on the first filter layer 251 covers the light shielding portion 2512. The second filter layer 252 covers the entire surface of the light shielding portion 2512 on the side away from the light-emitting layer 220.

In this embodiment, based on that the second filter layer 252 can cover the light-transmitting portion 25121 of the first filter layer 251 and simultaneously cover the light-shielding portion 2512 of the first filter layer 251, more external light can be incident on the second filter layer 252, which has the same beneficial effects as those of the first implementable embodiment described above, and thus, description is omitted.

In a third achievable embodiment, as shown in fig. 7, an orthographic projection of the second filter layer 252 on the first filter layer 251 covers the entire first filter layer 251.

In this embodiment, based on that the second filter layer 252 may cover the entire first filter layer 251, more external light may enter the second filter layer 252, which has the same beneficial effects as those of the first implementation, and thus, the description is omitted.

It should be noted that the filter portion 2511 based on the first filter layer 251 has higher transmittance for light in red, green and blue wavelength bands and greater absorption for light in other wavelength bands, and when the second filter layer 252 covers the whole first filter layer 251, the second filter layer 252 needs to avoid using a color filter layer to prevent the second filter layer 252 from affecting the transmission effect of the specific wavelength band of the first filter layer 251. The second filter layer 252 may include an insulating cover layer, which may have a filtering effect on all bands of light, and only reduce the transmittance of all bands of light, but not filter out a specific band of light, so that the filtering effect of the filtering portion 2511 of the first filter layer 251 is not affected.

In a third implementation manner of disposing the second filter layer 252, referring to fig. 8 to 13, a portion of the second filter layer 252 is filled in at least a portion of the light-transmitting hole, and the remaining portion of the second filter layer 252 covers a side of the first filter layer 251 away from the light-emitting layer 220.

In this embodiment, the second filter layer 252 employs a combination of the first and second achievable second filter layer setting embodiments.

For example, as shown in fig. 8, a portion of the second filter layer 252 is stacked and covers an end of the light-transmitting hole away from the light-emitting layer 220, the second filter layer 252 is located outside the light-transmitting hole, another portion of the second filter layer 252 is filled inside the end of the light-transmitting hole away from the light-emitting layer 220, and two portions of the second filter layer 252 are connected into a whole. As shown in fig. 9, a portion of the second filter layer 252 is stacked to cover an end of the light-transmitting hole away from the light-emitting layer 220, the second filter layer 252 is located outside the light-transmitting hole, another portion of the second filter layer 252 fills the whole light-transmitting hole, and the two portions of the second filter layer 252 are connected into a whole.

As shown in fig. 10, a part of the second filter layer 252 is stacked on the light shielding portion 2512 on the side away from the light emitting layer 220, the other part of the second filter layer 252 is filled in the light transmitting hole at the end away from the light emitting layer 220, and the two parts of the second filter layer 252 are integrally connected. As shown in fig. 11, a part of the second filter layer 252 is stacked on the light shielding portion 2512 on the side away from the light emitting layer 220, the other part of the second filter layer 252 fills the entire light transmitting hole, and the two parts of the second filter layer 252 are connected into a whole.

As shown in fig. 12, a portion of the second filter layer 252 is stacked on the side of the first filter layer 251 away from the light-emitting layer 220, another portion of the second filter layer 252 fills the inside of the end of the light-transmitting hole away from the light-emitting layer 220, and the two portions of the second filter layer 252 are connected into a whole. As shown in fig. 13, a portion of the second filter layer 252 covers the first filter layer 251 on the side away from the light-emitting layer 220, another portion of the second filter layer 252 fills the entire light-transmitting hole, and the two portions of the second filter layer 252 are connected into a whole.

In this way, the second filter layer 252 includes a portion stacked on the first filter layer 251 and a portion filled in the light-transmitting hole, so that more external light can enter the second filter layer 252, and the same advantages as those of the first implementation are achieved, and are not described in detail.

Of course, in the actual preparation process, the orthographic projection of the second filter layer 252 on the light-emitting layer 220 covers the orthographic projection of the light-transmitting portion 25121 on the light-emitting layer 220, and it can also be understood that the orthographic projection of part of the light-transmitting portion 25121 on the light-emitting layer 220 is located inside the orthographic projection of the second filter layer 252 on the light-emitting layer 220, and the orthographic projection of part of the light-transmitting portion 25121 on the light-emitting layer 220 is located outside the orthographic projection of the second filter layer 252 on the light-emitting layer 220.

In one implementation, the composite filter layer 250 further includes a third filter layer 253, the third filter layer 253 is located on a side of the second filter layer 252 away from the light-emitting layer 220, and an orthographic projection of the third filter layer 253 on the light-emitting layer 220 covers an orthographic projection of the second filter layer 252 on the light-emitting layer 220.

It should be noted that the third filter layer 253 may include an Anti-reflection (AR) layer, an Anti-fingerprint (AF) layer, or both of them, which are stacked along a direction away from the light emitting layer 220. The anti-reflection film layer and the anti-fingerprint film layer can be made of organic materials or inorganic materials, and the forming mode can comprise a spray forming process.

In the present embodiment, as shown in fig. 3, the second filter layer 252 includes a color filter layer, which only allows light in a specific wavelength band identified by the off-screen optical device 30 to pass through, and filters and absorbs light in another specific wavelength band. When an incident external light 310 is incident on the display panel 20, the second filter layer 252 filters and absorbs another light with a specific wavelength band due to the filtering effect of the second filter layer 252. The primary reflected external light 312 and the secondary reflected external light 320 emitted to the display panel 20 have hue problems in that the design required color cannot be displayed on the display panel 20 due to the absence of another light of a specific wavelength band.

The third filter layer 253 is arranged at a position where the second filter layer 252 has a color hue problem, and according to the principle of light matching, the third filter layer 253 is arranged to filter out light in other specific wavelength bands which affect the color hue problem, or the third filter layer 253 supplements a lacking color hue through color adding, so that the color hue problem of reflected light caused by the addition of the second filter layer 252 is alleviated.

In one possible implementation, as shown in fig. 1 to 13, an orthographic projection of the third filter layer 253 on the light-emitting layer 220 covers the entire light-emitting layer 220. The third filter layer 253 is disposed in a whole layer, so that the hue of the reflected light generated by the second filter layer 252 can be balanced and increased from the entire light emitting surface side of the light emitting layer, and the processing and manufacturing are facilitated.

In one implementation, as shown in fig. 1-13, an encapsulation layer 270 and an adhesive layer 260 are disposed between the second filter layer 252 and the third filter layer 253, and the adhesive layer 260 is disposed between the encapsulation layer 270 and the second filter layer 252.

The Adhesive layer 260 may include an Optical Clear Adhesive (OCA) layer.

The encapsulation layer 270 may include a Cover Glass (CG), a Cover Film (CF), or a combination of both, which may have a protective effect on the display panel.

In the embodiment, the second filter layer 252 is encapsulated by the encapsulation layer 270 and the adhesion layer 260, and the third filter layer 253 covers the other side of the encapsulation layer 270, so that the first filter layer 251 and the second filter layer 252 of the composite filter layer 250 are protected, and the structure requirement of the display panel 20 is met.

Referring to fig. 15, on the basis of the above embodiment, in a second aspect, the present embodiment provides a display device 10, which includes the under-screen optical device 30 and the above display panel 20, wherein the under-screen optical device 30 is located on the backlight side of the light-emitting layer 220 of the display panel 20.

It should be noted that the off-screen optical device 30 includes an off-screen optical fingerprint identifier, an off-screen camera, an off-screen bottom identifier, an off-screen distance sensor, and the like.

The display device may be a mobile or fixed terminal such as a mobile phone, a television, a tablet computer, a notebook computer, an ultra-mobile personal computer (UMPC), a Personal Digital Assistant (PDA), a virtual reality device, and the like.

The display device provided by the embodiment of the application comprises a display panel 20 and an optical device 30 under a screen, wherein the display panel is provided with a light-transmitting portion 25121 and a second filter layer 252, the defect of low transmittance of a light-shielding portion 2512 is overcome, the transmittance of light projected to the optical device 30 under the screen through the light-shielding portion 2512 is improved, the integration of the display panel 20 and the optical device 30 under the screen is facilitated, and the use requirement of the light incident quantity of the optical device 30 under the screen is met. Due to the fact that the second filter layer 252 is arranged, external light enters the second filter layer 252 after being incident for the first time and reflected in the screen for the second time, and the transmittance of the external light can be reduced compared with the case that only the light-transmitting portion 25121 is arranged, so that the reflectivity of the display panel 20 is effectively reduced, the diffraction and reflection problems of the display panel are reduced, and the using effect of the display panel is improved. The display device 10 has the same beneficial effects, and the using effect of the display device is improved.

In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be configured in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. In the description of the present application, "a plurality" means two or more unless specifically stated otherwise.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. The display panel is characterized by comprising a light emitting layer and a composite filter layer, wherein the composite filter layer is positioned on the light emitting side of the light emitting layer;

the light emitting layer comprises a plurality of light emitting areas, and a non-light emitting area is formed between every two adjacent light emitting areas;

the composite filter layer comprises a first filter layer and a second filter layer, the first filter layer comprises a plurality of filter parts, a light shielding part is formed between every two adjacent filter parts, the orthographic projection of the filter parts on the light-emitting layer covers the light-emitting region, and the orthographic projection of the light shielding part on the light-emitting layer covers the non-light-emitting region;

the shading part is provided with a light-transmitting part;

2. The display panel according to claim 1, wherein the light-transmitting portion includes a light-transmitting hole that penetrates the light-shielding portion in a thickness direction of the light-shielding portion.

3. The display panel according to claim 2, wherein a light absorbing member is disposed in the light-transmitting hole, and at least a partial edge of an orthographic projection of the light absorbing member on the light-emitting layer is spaced from an edge of the orthographic projection of the light-transmitting hole on the light-emitting layer.

4. The display panel according to any one of claims 2 or 3, wherein the second filter layer fills at least part of the light-transmitting holes in a depth direction of the light-transmitting holes;

preferably, the second filter layer fills the entire light-transmitting hole, or the second filter layer fills a part of the light-transmitting hole in a depth direction of the light-transmitting hole.

5. A display panel as claimed in any one of claims 1-3, characterized in that the second optical filter layer is arranged on top of the first optical filter layer;

preferably, the first filter layer is located on one side of the second filter layer close to the light emitting layer.

6. The display panel according to claim 5, wherein an orthographic projection of the second filter layer on the first filter layer covers the light shielding portion;

preferably, the second filter layer includes a color filter film layer.

7. The display panel according to claim 5, wherein an orthographic projection of the second optical filter on the first optical filter covers the entire first optical filter;

preferably, the second filter layer comprises an insulating cover layer.

8. The display panel of claim 6, wherein the composite filter layer further comprises a third filter layer on a side of the second filter layer away from the light emitting layer, an orthographic projection of the third filter layer on the light emitting layer covering an orthographic projection of the second filter layer on the light emitting layer;

preferably, the third optical filter layer comprises an anti-reflection antireflection film layer and/or an anti-fingerprint film layer;

preferably, an orthographic projection of the third filter layer on the light emitting layer covers the entire light emitting layer.

9. The display panel according to claim 8, wherein an encapsulation layer and an adhesive layer are provided between the second filter layer and the third filter layer, and wherein the adhesive layer is provided between the encapsulation layer and the second filter layer.

10. A display device comprising an underscreen optic and the display panel of any of claims 1-9, the underscreen optic being located on a backlight side of a light emitting layer of the display panel.